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

   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/in.h>
  32 #include <linux/ip.h>
  33 #include <linux/tcp.h>
  34 #include <linux/udp.h>
  35 #include <linux/if.h>
  36 #include <linux/list.h>
  37 #include <linux/slab.h>
  38 #include <linux/if_ether.h>
  39 #include <linux/notifier.h>
  40 #include <linux/reboot.h>
  41 #include <linux/memory.h>
  42 #include <asm/kexec.h>
  43 #include <linux/mutex.h>
  44 #include <linux/prefetch.h>
  45
  46 #include <net/ip.h>
  47
  48 #include "ehea.h"
  49 #include "ehea_qmr.h"
  50 #include "ehea_phyp.h"
  51
  52
  53 MODULE_LICENSE("GPL");
  54 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  55 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  56 MODULE_VERSION(DRV_VERSION);
  57
  58
  59 static int msg_level = -1;
  60 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  61 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  62 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  63 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  64 static int use_mcs = 1;
  65 static int prop_carrier_state;
  66
  67 module_param(msg_level, int, 0);
  68 module_param(rq1_entries, int, 0);
  69 module_param(rq2_entries, int, 0);
  70 module_param(rq3_entries, int, 0);
  71 module_param(sq_entries, int, 0);
  72 module_param(prop_carrier_state, int, 0);
  73 module_param(use_mcs, int, 0);
  74
  75 MODULE_PARM_DESC(msg_level, "msg_level");
  76 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  77                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  78 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  79                  "[2^x - 1], x = [6..14]. Default = "
  80                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  81 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  82                  "[2^x - 1], x = [6..14]. Default = "
  83                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  84 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  85                  "[2^x - 1], x = [6..14]. Default = "
  86                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  87 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  88                  "[2^x - 1], x = [6..14]. Default = "
  89                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  90 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  91                  "Default = 1");
  92
  93 static int port_name_cnt;
  94 static LIST_HEAD(adapter_list);
  95 static unsigned long ehea_driver_flags;
  96 static DEFINE_MUTEX(dlpar_mem_lock);
  97 struct ehea_fw_handle_array ehea_fw_handles;
  98 struct ehea_bcmc_reg_array ehea_bcmc_regs;
  99
 100
 101 static int __devinit ehea_probe_adapter(struct platform_device *dev,
 102                                         const struct of_device_id *id);
 103
 104 static int __devexit ehea_remove(struct platform_device *dev);
 105
 106 static struct of_device_id ehea_device_table[] = {
 107         {
 108                 .name = "lhea",
 109                 .compatible = "IBM,lhea",
 110         },
 111         {},
 112 };
 113 MODULE_DEVICE_TABLE(of, ehea_device_table);
 114
 115 static struct of_platform_driver ehea_driver = {
 116         .driver = {
 117                 .name = "ehea",
 118                 .owner = THIS_MODULE,
 119                 .of_match_table = ehea_device_table,
 120         },
 121         .probe = ehea_probe_adapter,
 122         .remove = ehea_remove,
 123 };
 124
 125 void ehea_dump(void *adr, int len, char *msg)
 126 {
 127         int x;
 128         unsigned char *deb = adr;
 129         for (x = 0; x < len; x += 16) {
 130                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 131                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 132                 deb += 16;
 133         }
 134 }
 135
 136 void ehea_schedule_port_reset(struct ehea_port *port)
 137 {
 138         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 139                 schedule_work(&port->reset_task);
 140 }
 141
 142 static void ehea_update_firmware_handles(void)
 143 {
 144         struct ehea_fw_handle_entry *arr = NULL;
 145         struct ehea_adapter *adapter;
 146         int num_adapters = 0;
 147         int num_ports = 0;
 148         int num_portres = 0;
 149         int i = 0;
 150         int num_fw_handles, k, l;
 151
 152         /* Determine number of handles */
 153         mutex_lock(&ehea_fw_handles.lock);
 154
 155         list_for_each_entry(adapter, &adapter_list, list) {
 156                 num_adapters++;
 157
 158                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 159                         struct ehea_port *port = adapter->port[k];
 160
 161                         if (!port || (port->state != EHEA_PORT_UP))
 162                                 continue;
 163
 164                         num_ports++;
 165                         num_portres += port->num_def_qps;
 166                 }
 167         }
 168
 169         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 170                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 171                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 172
 173         if (num_fw_handles) {
 174                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 175                 if (!arr)
 176                         goto out;  /* Keep the existing array */
 177         } else
 178                 goto out_update;
 179
 180         list_for_each_entry(adapter, &adapter_list, list) {
 181                 if (num_adapters == 0)
 182                         break;
 183
 184                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 185                         struct ehea_port *port = adapter->port[k];
 186
 187                         if (!port || (port->state != EHEA_PORT_UP) ||
 188                             (num_ports == 0))
 189                                 continue;
 190
 191                         for (l = 0; l < port->num_def_qps; l++) {
 192                                 struct ehea_port_res *pr = &port->port_res[l];
 193
 194                                 arr[i].adh = adapter->handle;
 195                                 arr[i++].fwh = pr->qp->fw_handle;
 196                                 arr[i].adh = adapter->handle;
 197                                 arr[i++].fwh = pr->send_cq->fw_handle;
 198                                 arr[i].adh = adapter->handle;
 199                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 200                                 arr[i].adh = adapter->handle;
 201                                 arr[i++].fwh = pr->eq->fw_handle;
 202                                 arr[i].adh = adapter->handle;
 203                                 arr[i++].fwh = pr->send_mr.handle;
 204                                 arr[i].adh = adapter->handle;
 205                                 arr[i++].fwh = pr->recv_mr.handle;
 206                         }
 207                         arr[i].adh = adapter->handle;
 208                         arr[i++].fwh = port->qp_eq->fw_handle;
 209                         num_ports--;
 210                 }
 211
 212                 arr[i].adh = adapter->handle;
 213                 arr[i++].fwh = adapter->neq->fw_handle;
 214
 215                 if (adapter->mr.handle) {
 216                         arr[i].adh = adapter->handle;
 217                         arr[i++].fwh = adapter->mr.handle;
 218                 }
 219                 num_adapters--;
 220         }
 221
 222 out_update:
 223         kfree(ehea_fw_handles.arr);
 224         ehea_fw_handles.arr = arr;
 225         ehea_fw_handles.num_entries = i;
 226 out:
 227         mutex_unlock(&ehea_fw_handles.lock);
 228 }
 229
 230 static void ehea_update_bcmc_registrations(void)
 231 {
 232         unsigned long flags;
 233         struct ehea_bcmc_reg_entry *arr = NULL;
 234         struct ehea_adapter *adapter;
 235         struct ehea_mc_list *mc_entry;
 236         int num_registrations = 0;
 237         int i = 0;
 238         int k;
 239
 240         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 241
 242         /* Determine number of registrations */
 243         list_for_each_entry(adapter, &adapter_list, list)
 244                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 245                         struct ehea_port *port = adapter->port[k];
 246
 247                         if (!port || (port->state != EHEA_PORT_UP))
 248                                 continue;
 249
 250                         num_registrations += 2; /* Broadcast registrations */
 251
 252                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 253                                 num_registrations += 2;
 254                 }
 255
 256         if (num_registrations) {
 257                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 258                 if (!arr)
 259                         goto out;  /* Keep the existing array */
 260         } else
 261                 goto out_update;
 262
 263         list_for_each_entry(adapter, &adapter_list, list) {
 264                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 265                         struct ehea_port *port = adapter->port[k];
 266
 267                         if (!port || (port->state != EHEA_PORT_UP))
 268                                 continue;
 269
 270                         if (num_registrations == 0)
 271                                 goto out_update;
 272
 273                         arr[i].adh = adapter->handle;
 274                         arr[i].port_id = port->logical_port_id;
 275                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 276                                           EHEA_BCMC_UNTAGGED;
 277                         arr[i++].macaddr = port->mac_addr;
 278
 279                         arr[i].adh = adapter->handle;
 280                         arr[i].port_id = port->logical_port_id;
 281                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 282                                           EHEA_BCMC_VLANID_ALL;
 283                         arr[i++].macaddr = port->mac_addr;
 284                         num_registrations -= 2;
 285
 286                         list_for_each_entry(mc_entry,
 287                                             &port->mc_list->list, list) {
 288                                 if (num_registrations == 0)
 289                                         goto out_update;
 290
 291                                 arr[i].adh = adapter->handle;
 292                                 arr[i].port_id = port->logical_port_id;
 293                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 294                                                   EHEA_BCMC_MULTICAST |
 295                                                   EHEA_BCMC_UNTAGGED;
 296                                 arr[i++].macaddr = mc_entry->macaddr;
 297
 298                                 arr[i].adh = adapter->handle;
 299                                 arr[i].port_id = port->logical_port_id;
 300                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 301                                                   EHEA_BCMC_MULTICAST |
 302                                                   EHEA_BCMC_VLANID_ALL;
 303                                 arr[i++].macaddr = mc_entry->macaddr;
 304                                 num_registrations -= 2;
 305                         }
 306                 }
 307         }
 308
 309 out_update:
 310         kfree(ehea_bcmc_regs.arr);
 311         ehea_bcmc_regs.arr = arr;
 312         ehea_bcmc_regs.num_entries = i;
 313 out:
 314         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 315 }
 316
 317 static struct rtnl_link_stats64 *ehea_get_stats64(struct net_device *dev,
 318                                         struct rtnl_link_stats64 *stats)
 319 {
 320         struct ehea_port *port = netdev_priv(dev);
 321         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 322         int i;
 323
 324         for (i = 0; i < port->num_def_qps; i++) {
 325                 rx_packets += port->port_res[i].rx_packets;
 326                 rx_bytes   += port->port_res[i].rx_bytes;
 327         }
 328
 329         for (i = 0; i < port->num_def_qps; i++) {
 330                 tx_packets += port->port_res[i].tx_packets;
 331                 tx_bytes   += port->port_res[i].tx_bytes;
 332         }
 333
 334         stats->tx_packets = tx_packets;
 335         stats->rx_bytes = rx_bytes;
 336         stats->tx_bytes = tx_bytes;
 337         stats->rx_packets = rx_packets;
 338
 339         return &port->stats;
 340 }
 341
 342 static void ehea_update_stats(struct work_struct *work)
 343 {
 344         struct ehea_port *port =
 345                 container_of(work, struct ehea_port, stats_work.work);
 346         struct net_device *dev = port->netdev;
 347         struct rtnl_link_stats64 *stats = &port->stats;
 348         struct hcp_ehea_port_cb2 *cb2;
 349         u64 hret;
 350
 351         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 352         if (!cb2) {
 353                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 354                 goto resched;
 355         }
 356
 357         hret = ehea_h_query_ehea_port(port->adapter->handle,
 358                                       port->logical_port_id,
 359                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 360         if (hret != H_SUCCESS) {
 361                 netdev_err(dev, "query_ehea_port failed\n");
 362                 goto out_herr;
 363         }
 364
 365         if (netif_msg_hw(port))
 366                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 367
 368         stats->multicast = cb2->rxmcp;
 369         stats->rx_errors = cb2->rxuerr;
 370
 371 out_herr:
 372         free_page((unsigned long)cb2);
 373 resched:
 374         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
 375 }
 376
 377 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 378 {
 379         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 380         struct net_device *dev = pr->port->netdev;
 381         int max_index_mask = pr->rq1_skba.len - 1;
 382         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 383         int adder = 0;
 384         int i;
 385
 386         pr->rq1_skba.os_skbs = 0;
 387
 388         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 389                 if (nr_of_wqes > 0)
 390                         pr->rq1_skba.index = index;
 391                 pr->rq1_skba.os_skbs = fill_wqes;
 392                 return;
 393         }
 394
 395         for (i = 0; i < fill_wqes; i++) {
 396                 if (!skb_arr_rq1[index]) {
 397                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 398                                                               EHEA_L_PKT_SIZE);
 399                         if (!skb_arr_rq1[index]) {
 400                                 netdev_info(dev, "Unable to allocate enough skb in the array\n");
 401                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 402                                 break;
 403                         }
 404                 }
 405                 index--;
 406                 index &= max_index_mask;
 407                 adder++;
 408         }
 409
 410         if (adder == 0)
 411                 return;
 412
 413         /* Ring doorbell */
 414         ehea_update_rq1a(pr->qp, adder);
 415 }
 416
 417 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 418 {
 419         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 420         struct net_device *dev = pr->port->netdev;
 421         int i;
 422
 423         if (nr_rq1a > pr->rq1_skba.len) {
 424                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 425                 return;
 426         }
 427
 428         for (i = 0; i < nr_rq1a; i++) {
 429                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 430                 if (!skb_arr_rq1[i]) {
 431                         netdev_info(dev, "Not enough memory to allocate skb array\n");
 432                         break;
 433                 }
 434         }
 435         /* Ring doorbell */
 436         ehea_update_rq1a(pr->qp, i - 1);
 437 }
 438
 439 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 440                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 441                               int num_wqes, int wqe_type, int packet_size)
 442 {
 443         struct net_device *dev = pr->port->netdev;
 444         struct ehea_qp *qp = pr->qp;
 445         struct sk_buff **skb_arr = q_skba->arr;
 446         struct ehea_rwqe *rwqe;
 447         int i, index, max_index_mask, fill_wqes;
 448         int adder = 0;
 449         int ret = 0;
 450
 451         fill_wqes = q_skba->os_skbs + num_wqes;
 452         q_skba->os_skbs = 0;
 453
 454         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 455                 q_skba->os_skbs = fill_wqes;
 456                 return ret;
 457         }
 458
 459         index = q_skba->index;
 460         max_index_mask = q_skba->len - 1;
 461         for (i = 0; i < fill_wqes; i++) {
 462                 u64 tmp_addr;
 463                 struct sk_buff *skb;
 464
 465                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 466                 if (!skb) {
 467                         q_skba->os_skbs = fill_wqes - i;
 468                         if (q_skba->os_skbs == q_skba->len - 2) {
 469                                 netdev_info(pr->port->netdev,
 470                                             "rq%i ran dry - no mem for skb\n",
 471                                             rq_nr);
 472                                 ret = -ENOMEM;
 473                         }
 474                         break;
 475                 }
 476
 477                 skb_arr[index] = skb;
 478                 tmp_addr = ehea_map_vaddr(skb->data);
 479                 if (tmp_addr == -1) {
 480                         dev_kfree_skb(skb);
 481                         q_skba->os_skbs = fill_wqes - i;
 482                         ret = 0;
 483                         break;
 484                 }
 485
 486                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 487                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 488                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 489                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 490                 rwqe->sg_list[0].vaddr = tmp_addr;
 491                 rwqe->sg_list[0].len = packet_size;
 492                 rwqe->data_segments = 1;
 493
 494                 index++;
 495                 index &= max_index_mask;
 496                 adder++;
 497         }
 498
 499         q_skba->index = index;
 500         if (adder == 0)
 501                 goto out;
 502
 503         /* Ring doorbell */
 504         iosync();
 505         if (rq_nr == 2)
 506                 ehea_update_rq2a(pr->qp, adder);
 507         else
 508                 ehea_update_rq3a(pr->qp, adder);
 509 out:
 510         return ret;
 511 }
 512
 513
 514 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 515 {
 516         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 517                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 518                                   EHEA_RQ2_PKT_SIZE);
 519 }
 520
 521
 522 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 523 {
 524         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 525                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 526                                   EHEA_MAX_PACKET_SIZE);
 527 }
 528
 529 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 530 {
 531         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 532         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 533                 return 0;
 534         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 535             (cqe->header_length == 0))
 536                 return 0;
 537         return -EINVAL;
 538 }
 539
 540 static inline void ehea_fill_skb(struct net_device *dev,
 541                                  struct sk_buff *skb, struct ehea_cqe *cqe,
 542                                  struct ehea_port_res *pr)
 543 {
 544         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 545
 546         skb_put(skb, length);
 547         skb->protocol = eth_type_trans(skb, dev);
 548
 549         /* The packet was not an IPV4 packet so a complemented checksum was
 550            calculated. The value is found in the Internet Checksum field. */
 551         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 552                 skb->ip_summed = CHECKSUM_COMPLETE;
 553                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 554         } else
 555                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 556
 557         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 558 }
 559
 560 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 561                                                int arr_len,
 562                                                struct ehea_cqe *cqe)
 563 {
 564         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 565         struct sk_buff *skb;
 566         void *pref;
 567         int x;
 568
 569         x = skb_index + 1;
 570         x &= (arr_len - 1);
 571
 572         pref = skb_array[x];
 573         if (pref) {
 574                 prefetchw(pref);
 575                 prefetchw(pref + EHEA_CACHE_LINE);
 576
 577                 pref = (skb_array[x]->data);
 578                 prefetch(pref);
 579                 prefetch(pref + EHEA_CACHE_LINE);
 580                 prefetch(pref + EHEA_CACHE_LINE * 2);
 581                 prefetch(pref + EHEA_CACHE_LINE * 3);
 582         }
 583
 584         skb = skb_array[skb_index];
 585         skb_array[skb_index] = NULL;
 586         return skb;
 587 }
 588
 589 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 590                                                   int arr_len, int wqe_index)
 591 {
 592         struct sk_buff *skb;
 593         void *pref;
 594         int x;
 595
 596         x = wqe_index + 1;
 597         x &= (arr_len - 1);
 598
 599         pref = skb_array[x];
 600         if (pref) {
 601                 prefetchw(pref);
 602                 prefetchw(pref + EHEA_CACHE_LINE);
 603
 604                 pref = (skb_array[x]->data);
 605                 prefetchw(pref);
 606                 prefetchw(pref + EHEA_CACHE_LINE);
 607         }
 608
 609         skb = skb_array[wqe_index];
 610         skb_array[wqe_index] = NULL;
 611         return skb;
 612 }
 613
 614 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 615                                  struct ehea_cqe *cqe, int *processed_rq2,
 616                                  int *processed_rq3)
 617 {
 618         struct sk_buff *skb;
 619
 620         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 621                 pr->p_stats.err_tcp_cksum++;
 622         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 623                 pr->p_stats.err_ip_cksum++;
 624         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 625                 pr->p_stats.err_frame_crc++;
 626
 627         if (rq == 2) {
 628                 *processed_rq2 += 1;
 629                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 630                 dev_kfree_skb(skb);
 631         } else if (rq == 3) {
 632                 *processed_rq3 += 1;
 633                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 634                 dev_kfree_skb(skb);
 635         }
 636
 637         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 638                 if (netif_msg_rx_err(pr->port)) {
 639                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 640                                pr->qp->init_attr.qp_nr);
 641                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 642                 }
 643                 ehea_schedule_port_reset(pr->port);
 644                 return 1;
 645         }
 646
 647         return 0;
 648 }
 649
 650 static int ehea_proc_rwqes(struct net_device *dev,
 651                            struct ehea_port_res *pr,
 652                            int budget)
 653 {
 654         struct ehea_port *port = pr->port;
 655         struct ehea_qp *qp = pr->qp;
 656         struct ehea_cqe *cqe;
 657         struct sk_buff *skb;
 658         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 659         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 660         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 661         int skb_arr_rq1_len = pr->rq1_skba.len;
 662         int skb_arr_rq2_len = pr->rq2_skba.len;
 663         int skb_arr_rq3_len = pr->rq3_skba.len;
 664         int processed, processed_rq1, processed_rq2, processed_rq3;
 665         u64 processed_bytes = 0;
 666         int wqe_index, last_wqe_index, rq, port_reset;
 667
 668         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 669         last_wqe_index = 0;
 670
 671         cqe = ehea_poll_rq1(qp, &wqe_index);
 672         while ((processed < budget) && cqe) {
 673                 ehea_inc_rq1(qp);
 674                 processed_rq1++;
 675                 processed++;
 676                 if (netif_msg_rx_status(port))
 677                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 678
 679                 last_wqe_index = wqe_index;
 680                 rmb();
 681                 if (!ehea_check_cqe(cqe, &rq)) {
 682                         if (rq == 1) {
 683                                 /* LL RQ1 */
 684                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 685                                                           skb_arr_rq1_len,
 686                                                           wqe_index);
 687                                 if (unlikely(!skb)) {
 688                                         netif_info(port, rx_err, dev,
 689                                                   "LL rq1: skb=NULL\n");
 690
 691                                         skb = netdev_alloc_skb(dev,
 692                                                                EHEA_L_PKT_SIZE);
 693                                         if (!skb) {
 694                                                 netdev_err(dev, "Not enough memory to allocate skb\n");
 695                                                 break;
 696                                         }
 697                                 }
 698                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 699                                                  cqe->num_bytes_transfered - 4);
 700                                 ehea_fill_skb(dev, skb, cqe, pr);
 701                         } else if (rq == 2) {
 702                                 /* RQ2 */
 703                                 skb = get_skb_by_index(skb_arr_rq2,
 704                                                        skb_arr_rq2_len, cqe);
 705                                 if (unlikely(!skb)) {
 706                                         netif_err(port, rx_err, dev,
 707                                                   "rq2: skb=NULL\n");
 708                                         break;
 709                                 }
 710                                 ehea_fill_skb(dev, skb, cqe, pr);
 711                                 processed_rq2++;
 712                         } else {
 713                                 /* RQ3 */
 714                                 skb = get_skb_by_index(skb_arr_rq3,
 715                                                        skb_arr_rq3_len, cqe);
 716                                 if (unlikely(!skb)) {
 717                                         netif_err(port, rx_err, dev,
 718                                                   "rq3: skb=NULL\n");
 719                                         break;
 720                                 }
 721                                 ehea_fill_skb(dev, skb, cqe, pr);
 722                                 processed_rq3++;
 723                         }
 724
 725                         processed_bytes += skb->len;
 726
 727                         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 728                                 __vlan_hwaccel_put_tag(skb, cqe->vlan_tag);
 729
 730                         napi_gro_receive(&pr->napi, skb);
 731                 } else {
 732                         pr->p_stats.poll_receive_errors++;
 733                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 734                                                            &processed_rq2,
 735                                                            &processed_rq3);
 736                         if (port_reset)
 737                                 break;
 738                 }
 739                 cqe = ehea_poll_rq1(qp, &wqe_index);
 740         }
 741
 742         pr->rx_packets += processed;
 743         pr->rx_bytes += processed_bytes;
 744
 745         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 746         ehea_refill_rq2(pr, processed_rq2);
 747         ehea_refill_rq3(pr, processed_rq3);
 748
 749         return processed;
 750 }
 751
 752 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 753
 754 static void reset_sq_restart_flag(struct ehea_port *port)
 755 {
 756         int i;
 757
 758         for (i = 0; i < port->num_def_qps; i++) {
 759                 struct ehea_port_res *pr = &port->port_res[i];
 760                 pr->sq_restart_flag = 0;
 761         }
 762         wake_up(&port->restart_wq);
 763 }
 764
 765 static void check_sqs(struct ehea_port *port)
 766 {
 767         struct ehea_swqe *swqe;
 768         int swqe_index;
 769         int i, k;
 770
 771         for (i = 0; i < port->num_def_qps; i++) {
 772                 struct ehea_port_res *pr = &port->port_res[i];
 773                 int ret;
 774                 k = 0;
 775                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 776                 memset(swqe, 0, SWQE_HEADER_SIZE);
 777                 atomic_dec(&pr->swqe_avail);
 778
 779                 swqe->tx_control |= EHEA_SWQE_PURGE;
 780                 swqe->wr_id = SWQE_RESTART_CHECK;
 781                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 782                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 783                 swqe->immediate_data_length = 80;
 784
 785                 ehea_post_swqe(pr->qp, swqe);
 786
 787                 ret = wait_event_timeout(port->restart_wq,
 788                                          pr->sq_restart_flag == 0,
 789                                          msecs_to_jiffies(100));
 790
 791                 if (!ret) {
 792                         pr_err("HW/SW queues out of sync\n");
 793                         ehea_schedule_port_reset(pr->port);
 794                         return;
 795                 }
 796         }
 797 }
 798
 799
 800 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 801 {
 802         struct sk_buff *skb;
 803         struct ehea_cq *send_cq = pr->send_cq;
 804         struct ehea_cqe *cqe;
 805         int quota = my_quota;
 806         int cqe_counter = 0;
 807         int swqe_av = 0;
 808         int index;
 809         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 810                                                 pr - &pr->port->port_res[0]);
 811
 812         cqe = ehea_poll_cq(send_cq);
 813         while (cqe && (quota > 0)) {
 814                 ehea_inc_cq(send_cq);
 815
 816                 cqe_counter++;
 817                 rmb();
 818
 819                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 820                         pr->sq_restart_flag = 1;
 821                         swqe_av++;
 822                         break;
 823                 }
 824
 825                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 826                         pr_err("Bad send completion status=0x%04X\n",
 827                                cqe->status);
 828
 829                         if (netif_msg_tx_err(pr->port))
 830                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 831
 832                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 833                                 pr_err("Resetting port\n");
 834                                 ehea_schedule_port_reset(pr->port);
 835                                 break;
 836                         }
 837                 }
 838
 839                 if (netif_msg_tx_done(pr->port))
 840                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 841
 842                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 843                            == EHEA_SWQE2_TYPE)) {
 844
 845                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 846                         skb = pr->sq_skba.arr[index];
 847                         dev_kfree_skb(skb);
 848                         pr->sq_skba.arr[index] = NULL;
 849                 }
 850
 851                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 852                 quota--;
 853
 854                 cqe = ehea_poll_cq(send_cq);
 855         }
 856
 857         ehea_update_feca(send_cq, cqe_counter);
 858         atomic_add(swqe_av, &pr->swqe_avail);
 859
 860         if (unlikely(netif_tx_queue_stopped(txq) &&
 861                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 862                 __netif_tx_lock(txq, smp_processor_id());
 863                 if (netif_tx_queue_stopped(txq) &&
 864                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 865                         netif_tx_wake_queue(txq);
 866                 __netif_tx_unlock(txq);
 867         }
 868
 869         wake_up(&pr->port->swqe_avail_wq);
 870
 871         return cqe;
 872 }
 873
 874 #define EHEA_POLL_MAX_CQES 65535
 875
 876 static int ehea_poll(struct napi_struct *napi, int budget)
 877 {
 878         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 879                                                 napi);
 880         struct net_device *dev = pr->port->netdev;
 881         struct ehea_cqe *cqe;
 882         struct ehea_cqe *cqe_skb = NULL;
 883         int wqe_index;
 884         int rx = 0;
 885
 886         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 887         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 888
 889         while (rx != budget) {
 890                 napi_complete(napi);
 891                 ehea_reset_cq_ep(pr->recv_cq);
 892                 ehea_reset_cq_ep(pr->send_cq);
 893                 ehea_reset_cq_n1(pr->recv_cq);
 894                 ehea_reset_cq_n1(pr->send_cq);
 895                 rmb();
 896                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 897                 cqe_skb = ehea_poll_cq(pr->send_cq);
 898
 899                 if (!cqe && !cqe_skb)
 900                         return rx;
 901
 902                 if (!napi_reschedule(napi))
 903                         return rx;
 904
 905                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 906                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 907         }
 908
 909         return rx;
 910 }
 911
 912 #ifdef CONFIG_NET_POLL_CONTROLLER
 913 static void ehea_netpoll(struct net_device *dev)
 914 {
 915         struct ehea_port *port = netdev_priv(dev);
 916         int i;
 917
 918         for (i = 0; i < port->num_def_qps; i++)
 919                 napi_schedule(&port->port_res[i].napi);
 920 }
 921 #endif
 922
 923 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 924 {
 925         struct ehea_port_res *pr = param;
 926
 927         napi_schedule(&pr->napi);
 928
 929         return IRQ_HANDLED;
 930 }
 931
 932 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 933 {
 934         struct ehea_port *port = param;
 935         struct ehea_eqe *eqe;
 936         struct ehea_qp *qp;
 937         u32 qp_token;
 938         u64 resource_type, aer, aerr;
 939         int reset_port = 0;
 940
 941         eqe = ehea_poll_eq(port->qp_eq);
 942
 943         while (eqe) {
 944                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 945                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 946                        eqe->entry, qp_token);
 947
 948                 qp = port->port_res[qp_token].qp;
 949
 950                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 951                                                 &aer, &aerr);
 952
 953                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 954                         if ((aer & EHEA_AER_RESET_MASK) ||
 955                             (aerr & EHEA_AERR_RESET_MASK))
 956                                  reset_port = 1;
 957                 } else
 958                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 959
 960                 eqe = ehea_poll_eq(port->qp_eq);
 961         }
 962
 963         if (reset_port) {
 964                 pr_err("Resetting port\n");
 965                 ehea_schedule_port_reset(port);
 966         }
 967
 968         return IRQ_HANDLED;
 969 }
 970
 971 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 972                                        int logical_port)
 973 {
 974         int i;
 975
 976         for (i = 0; i < EHEA_MAX_PORTS; i++)
 977                 if (adapter->port[i])
 978                         if (adapter->port[i]->logical_port_id == logical_port)
 979                                 return adapter->port[i];
 980         return NULL;
 981 }
 982
 983 int ehea_sense_port_attr(struct ehea_port *port)
 984 {
 985         int ret;
 986         u64 hret;
 987         struct hcp_ehea_port_cb0 *cb0;
 988
 989         /* may be called via ehea_neq_tasklet() */
 990         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 991         if (!cb0) {
 992                 pr_err("no mem for cb0\n");
 993                 ret = -ENOMEM;
 994                 goto out;
 995         }
 996
 997         hret = ehea_h_query_ehea_port(port->adapter->handle,
 998                                       port->logical_port_id, H_PORT_CB0,
 999                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1000                                       cb0);
1001         if (hret != H_SUCCESS) {
1002                 ret = -EIO;
1003                 goto out_free;
1004         }
1005
1006         /* MAC address */
1007         port->mac_addr = cb0->port_mac_addr << 16;
1008
1009         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1010                 ret = -EADDRNOTAVAIL;
1011                 goto out_free;
1012         }
1013
1014         /* Port speed */
1015         switch (cb0->port_speed) {
1016         case H_SPEED_10M_H:
1017                 port->port_speed = EHEA_SPEED_10M;
1018                 port->full_duplex = 0;
1019                 break;
1020         case H_SPEED_10M_F:
1021                 port->port_speed = EHEA_SPEED_10M;
1022                 port->full_duplex = 1;
1023                 break;
1024         case H_SPEED_100M_H:
1025                 port->port_speed = EHEA_SPEED_100M;
1026                 port->full_duplex = 0;
1027                 break;
1028         case H_SPEED_100M_F:
1029                 port->port_speed = EHEA_SPEED_100M;
1030                 port->full_duplex = 1;
1031                 break;
1032         case H_SPEED_1G_F:
1033                 port->port_speed = EHEA_SPEED_1G;
1034                 port->full_duplex = 1;
1035                 break;
1036         case H_SPEED_10G_F:
1037                 port->port_speed = EHEA_SPEED_10G;
1038                 port->full_duplex = 1;
1039                 break;
1040         default:
1041                 port->port_speed = 0;
1042                 port->full_duplex = 0;
1043                 break;
1044         }
1045
1046         port->autoneg = 1;
1047         port->num_mcs = cb0->num_default_qps;
1048
1049         /* Number of default QPs */
1050         if (use_mcs)
1051                 port->num_def_qps = cb0->num_default_qps;
1052         else
1053                 port->num_def_qps = 1;
1054
1055         if (!port->num_def_qps) {
1056                 ret = -EINVAL;
1057                 goto out_free;
1058         }
1059
1060         ret = 0;
1061 out_free:
1062         if (ret || netif_msg_probe(port))
1063                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1064         free_page((unsigned long)cb0);
1065 out:
1066         return ret;
1067 }
1068
1069 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1070 {
1071         struct hcp_ehea_port_cb4 *cb4;
1072         u64 hret;
1073         int ret = 0;
1074
1075         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1076         if (!cb4) {
1077                 pr_err("no mem for cb4\n");
1078                 ret = -ENOMEM;
1079                 goto out;
1080         }
1081
1082         cb4->port_speed = port_speed;
1083
1084         netif_carrier_off(port->netdev);
1085
1086         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1087                                        port->logical_port_id,
1088                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1089         if (hret == H_SUCCESS) {
1090                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1091
1092                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1093                                               port->logical_port_id,
1094                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1095                                               cb4);
1096                 if (hret == H_SUCCESS) {
1097                         switch (cb4->port_speed) {
1098                         case H_SPEED_10M_H:
1099                                 port->port_speed = EHEA_SPEED_10M;
1100                                 port->full_duplex = 0;
1101                                 break;
1102                         case H_SPEED_10M_F:
1103                                 port->port_speed = EHEA_SPEED_10M;
1104                                 port->full_duplex = 1;
1105                                 break;
1106                         case H_SPEED_100M_H:
1107                                 port->port_speed = EHEA_SPEED_100M;
1108                                 port->full_duplex = 0;
1109                                 break;
1110                         case H_SPEED_100M_F:
1111                                 port->port_speed = EHEA_SPEED_100M;
1112                                 port->full_duplex = 1;
1113                                 break;
1114                         case H_SPEED_1G_F:
1115                                 port->port_speed = EHEA_SPEED_1G;
1116                                 port->full_duplex = 1;
1117                                 break;
1118                         case H_SPEED_10G_F:
1119                                 port->port_speed = EHEA_SPEED_10G;
1120                                 port->full_duplex = 1;
1121                                 break;
1122                         default:
1123                                 port->port_speed = 0;
1124                                 port->full_duplex = 0;
1125                                 break;
1126                         }
1127                 } else {
1128                         pr_err("Failed sensing port speed\n");
1129                         ret = -EIO;
1130                 }
1131         } else {
1132                 if (hret == H_AUTHORITY) {
1133                         pr_info("Hypervisor denied setting port speed\n");
1134                         ret = -EPERM;
1135                 } else {
1136                         ret = -EIO;
1137                         pr_err("Failed setting port speed\n");
1138                 }
1139         }
1140         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1141                 netif_carrier_on(port->netdev);
1142
1143         free_page((unsigned long)cb4);
1144 out:
1145         return ret;
1146 }
1147
1148 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1149 {
1150         int ret;
1151         u8 ec;
1152         u8 portnum;
1153         struct ehea_port *port;
1154         struct net_device *dev;
1155
1156         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1157         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1158         port = ehea_get_port(adapter, portnum);
1159         dev = port->netdev;
1160
1161         switch (ec) {
1162         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1163
1164                 if (!port) {
1165                         netdev_err(dev, "unknown portnum %x\n", portnum);
1166                         break;
1167                 }
1168
1169                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1170                         if (!netif_carrier_ok(dev)) {
1171                                 ret = ehea_sense_port_attr(port);
1172                                 if (ret) {
1173                                         netdev_err(dev, "failed resensing port attributes\n");
1174                                         break;
1175                                 }
1176
1177                                 netif_info(port, link, dev,
1178                                            "Logical port up: %dMbps %s Duplex\n",
1179                                            port->port_speed,
1180                                            port->full_duplex == 1 ?
1181                                            "Full" : "Half");
1182
1183                                 netif_carrier_on(dev);
1184                                 netif_wake_queue(dev);
1185                         }
1186                 } else
1187                         if (netif_carrier_ok(dev)) {
1188                                 netif_info(port, link, dev,
1189                                            "Logical port down\n");
1190                                 netif_carrier_off(dev);
1191                                 netif_tx_disable(dev);
1192                         }
1193
1194                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1195                         port->phy_link = EHEA_PHY_LINK_UP;
1196                         netif_info(port, link, dev,
1197                                    "Physical port up\n");
1198                         if (prop_carrier_state)
1199                                 netif_carrier_on(dev);
1200                 } else {
1201                         port->phy_link = EHEA_PHY_LINK_DOWN;
1202                         netif_info(port, link, dev,
1203                                    "Physical port down\n");
1204                         if (prop_carrier_state)
1205                                 netif_carrier_off(dev);
1206                 }
1207
1208                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1209                         netdev_info(dev,
1210                                     "External switch port is primary port\n");
1211                 else
1212                         netdev_info(dev,
1213                                     "External switch port is backup port\n");
1214
1215                 break;
1216         case EHEA_EC_ADAPTER_MALFUNC:
1217                 netdev_err(dev, "Adapter malfunction\n");
1218                 break;
1219         case EHEA_EC_PORT_MALFUNC:
1220                 netdev_info(dev, "Port malfunction\n");
1221                 netif_carrier_off(dev);
1222                 netif_tx_disable(dev);
1223                 break;
1224         default:
1225                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1226                 break;
1227         }
1228 }
1229
1230 static void ehea_neq_tasklet(unsigned long data)
1231 {
1232         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1233         struct ehea_eqe *eqe;
1234         u64 event_mask;
1235
1236         eqe = ehea_poll_eq(adapter->neq);
1237         pr_debug("eqe=%p\n", eqe);
1238
1239         while (eqe) {
1240                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1241                 ehea_parse_eqe(adapter, eqe->entry);
1242                 eqe = ehea_poll_eq(adapter->neq);
1243                 pr_debug("next eqe=%p\n", eqe);
1244         }
1245
1246         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1247                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1248                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1249
1250         ehea_h_reset_events(adapter->handle,
1251                             adapter->neq->fw_handle, event_mask);
1252 }
1253
1254 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1255 {
1256         struct ehea_adapter *adapter = param;
1257         tasklet_hi_schedule(&adapter->neq_tasklet);
1258         return IRQ_HANDLED;
1259 }
1260
1261
1262 static int ehea_fill_port_res(struct ehea_port_res *pr)
1263 {
1264         int ret;
1265         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1266
1267         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1268
1269         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1270
1271         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1272
1273         return ret;
1274 }
1275
1276 static int ehea_reg_interrupts(struct net_device *dev)
1277 {
1278         struct ehea_port *port = netdev_priv(dev);
1279         struct ehea_port_res *pr;
1280         int i, ret;
1281
1282
1283         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1284                  dev->name);
1285
1286         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1287                                   ehea_qp_aff_irq_handler,
1288                                   IRQF_DISABLED, port->int_aff_name, port);
1289         if (ret) {
1290                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1291                            port->qp_eq->attr.ist1);
1292                 goto out_free_qpeq;
1293         }
1294
1295         netif_info(port, ifup, dev,
1296                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1297                    port->qp_eq->attr.ist1);
1298
1299
1300         for (i = 0; i < port->num_def_qps; i++) {
1301                 pr = &port->port_res[i];
1302                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1303                          "%s-queue%d", dev->name, i);
1304                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1305                                           ehea_recv_irq_handler,
1306                                           IRQF_DISABLED, pr->int_send_name,
1307                                           pr);
1308                 if (ret) {
1309                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1310                                    i, pr->eq->attr.ist1);
1311                         goto out_free_req;
1312                 }
1313                 netif_info(port, ifup, dev,
1314                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1315                            pr->eq->attr.ist1, i);
1316         }
1317 out:
1318         return ret;
1319
1320
1321 out_free_req:
1322         while (--i >= 0) {
1323                 u32 ist = port->port_res[i].eq->attr.ist1;
1324                 ibmebus_free_irq(ist, &port->port_res[i]);
1325         }
1326
1327 out_free_qpeq:
1328         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1329         i = port->num_def_qps;
1330
1331         goto out;
1332
1333 }
1334
1335 static void ehea_free_interrupts(struct net_device *dev)
1336 {
1337         struct ehea_port *port = netdev_priv(dev);
1338         struct ehea_port_res *pr;
1339         int i;
1340
1341         /* send */
1342
1343         for (i = 0; i < port->num_def_qps; i++) {
1344                 pr = &port->port_res[i];
1345                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1346                 netif_info(port, intr, dev,
1347                            "free send irq for res %d with handle 0x%X\n",
1348                            i, pr->eq->attr.ist1);
1349         }
1350
1351         /* associated events */
1352         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1353         netif_info(port, intr, dev,
1354                    "associated event interrupt for handle 0x%X freed\n",
1355                    port->qp_eq->attr.ist1);
1356 }
1357
1358 static int ehea_configure_port(struct ehea_port *port)
1359 {
1360         int ret, i;
1361         u64 hret, mask;
1362         struct hcp_ehea_port_cb0 *cb0;
1363
1364         ret = -ENOMEM;
1365         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1366         if (!cb0)
1367                 goto out;
1368
1369         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1370                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1371                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1372                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1373                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1374                                       PXLY_RC_VLAN_FILTER)
1375                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1376
1377         for (i = 0; i < port->num_mcs; i++)
1378                 if (use_mcs)
1379                         cb0->default_qpn_arr[i] =
1380                                 port->port_res[i].qp->init_attr.qp_nr;
1381                 else
1382                         cb0->default_qpn_arr[i] =
1383                                 port->port_res[0].qp->init_attr.qp_nr;
1384
1385         if (netif_msg_ifup(port))
1386                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1387
1388         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1389              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1390
1391         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1392                                        port->logical_port_id,
1393                                        H_PORT_CB0, mask, cb0);
1394         ret = -EIO;
1395         if (hret != H_SUCCESS)
1396                 goto out_free;
1397
1398         ret = 0;
1399
1400 out_free:
1401         free_page((unsigned long)cb0);
1402 out:
1403         return ret;
1404 }
1405
1406 int ehea_gen_smrs(struct ehea_port_res *pr)
1407 {
1408         int ret;
1409         struct ehea_adapter *adapter = pr->port->adapter;
1410
1411         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1412         if (ret)
1413                 goto out;
1414
1415         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1416         if (ret)
1417                 goto out_free;
1418
1419         return 0;
1420
1421 out_free:
1422         ehea_rem_mr(&pr->send_mr);
1423 out:
1424         pr_err("Generating SMRS failed\n");
1425         return -EIO;
1426 }
1427
1428 int ehea_rem_smrs(struct ehea_port_res *pr)
1429 {
1430         if ((ehea_rem_mr(&pr->send_mr)) ||
1431             (ehea_rem_mr(&pr->recv_mr)))
1432                 return -EIO;
1433         else
1434                 return 0;
1435 }
1436
1437 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1438 {
1439         int arr_size = sizeof(void *) * max_q_entries;
1440
1441         q_skba->arr = vzalloc(arr_size);
1442         if (!q_skba->arr)
1443                 return -ENOMEM;
1444
1445         q_skba->len = max_q_entries;
1446         q_skba->index = 0;
1447         q_skba->os_skbs = 0;
1448
1449         return 0;
1450 }
1451
1452 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1453                               struct port_res_cfg *pr_cfg, int queue_token)
1454 {
1455         struct ehea_adapter *adapter = port->adapter;
1456         enum ehea_eq_type eq_type = EHEA_EQ;
1457         struct ehea_qp_init_attr *init_attr = NULL;
1458         int ret = -EIO;
1459         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1460
1461         tx_bytes = pr->tx_bytes;
1462         tx_packets = pr->tx_packets;
1463         rx_bytes = pr->rx_bytes;
1464         rx_packets = pr->rx_packets;
1465
1466         memset(pr, 0, sizeof(struct ehea_port_res));
1467
1468         pr->tx_bytes = rx_bytes;
1469         pr->tx_packets = tx_packets;
1470         pr->rx_bytes = rx_bytes;
1471         pr->rx_packets = rx_packets;
1472
1473         pr->port = port;
1474
1475         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1476         if (!pr->eq) {
1477                 pr_err("create_eq failed (eq)\n");
1478                 goto out_free;
1479         }
1480
1481         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1482                                      pr->eq->fw_handle,
1483                                      port->logical_port_id);
1484         if (!pr->recv_cq) {
1485                 pr_err("create_cq failed (cq_recv)\n");
1486                 goto out_free;
1487         }
1488
1489         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1490                                      pr->eq->fw_handle,
1491                                      port->logical_port_id);
1492         if (!pr->send_cq) {
1493                 pr_err("create_cq failed (cq_send)\n");
1494                 goto out_free;
1495         }
1496
1497         if (netif_msg_ifup(port))
1498                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1499                         pr->send_cq->attr.act_nr_of_cqes,
1500                         pr->recv_cq->attr.act_nr_of_cqes);
1501
1502         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1503         if (!init_attr) {
1504                 ret = -ENOMEM;
1505                 pr_err("no mem for ehea_qp_init_attr\n");
1506                 goto out_free;
1507         }
1508
1509         init_attr->low_lat_rq1 = 1;
1510         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1511         init_attr->rq_count = 3;
1512         init_attr->qp_token = queue_token;
1513         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1514         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1515         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1516         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1517         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1518         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1519         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1520         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1521         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1522         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1523         init_attr->port_nr = port->logical_port_id;
1524         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1525         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1526         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1527
1528         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1529         if (!pr->qp) {
1530                 pr_err("create_qp failed\n");
1531                 ret = -EIO;
1532                 goto out_free;
1533         }
1534
1535         if (netif_msg_ifup(port))
1536                 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",
1537                         init_attr->qp_nr,
1538                         init_attr->act_nr_send_wqes,
1539                         init_attr->act_nr_rwqes_rq1,
1540                         init_attr->act_nr_rwqes_rq2,
1541                         init_attr->act_nr_rwqes_rq3);
1542
1543         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1544
1545         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1546         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1547         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1548         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1549         if (ret)
1550                 goto out_free;
1551
1552         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1553         if (ehea_gen_smrs(pr) != 0) {
1554                 ret = -EIO;
1555                 goto out_free;
1556         }
1557
1558         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1559
1560         kfree(init_attr);
1561
1562         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1563
1564         ret = 0;
1565         goto out;
1566
1567 out_free:
1568         kfree(init_attr);
1569         vfree(pr->sq_skba.arr);
1570         vfree(pr->rq1_skba.arr);
1571         vfree(pr->rq2_skba.arr);
1572         vfree(pr->rq3_skba.arr);
1573         ehea_destroy_qp(pr->qp);
1574         ehea_destroy_cq(pr->send_cq);
1575         ehea_destroy_cq(pr->recv_cq);
1576         ehea_destroy_eq(pr->eq);
1577 out:
1578         return ret;
1579 }
1580
1581 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1582 {
1583         int ret, i;
1584
1585         if (pr->qp)
1586                 netif_napi_del(&pr->napi);
1587
1588         ret = ehea_destroy_qp(pr->qp);
1589
1590         if (!ret) {
1591                 ehea_destroy_cq(pr->send_cq);
1592                 ehea_destroy_cq(pr->recv_cq);
1593                 ehea_destroy_eq(pr->eq);
1594
1595                 for (i = 0; i < pr->rq1_skba.len; i++)
1596                         if (pr->rq1_skba.arr[i])
1597                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1598
1599                 for (i = 0; i < pr->rq2_skba.len; i++)
1600                         if (pr->rq2_skba.arr[i])
1601                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1602
1603                 for (i = 0; i < pr->rq3_skba.len; i++)
1604                         if (pr->rq3_skba.arr[i])
1605                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1606
1607                 for (i = 0; i < pr->sq_skba.len; i++)
1608                         if (pr->sq_skba.arr[i])
1609                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1610
1611                 vfree(pr->rq1_skba.arr);
1612                 vfree(pr->rq2_skba.arr);
1613                 vfree(pr->rq3_skba.arr);
1614                 vfree(pr->sq_skba.arr);
1615                 ret = ehea_rem_smrs(pr);
1616         }
1617         return ret;
1618 }
1619
1620 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1621                                   u32 lkey)
1622 {
1623         int skb_data_size = skb_headlen(skb);
1624         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1625         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1626         unsigned int immediate_len = SWQE2_MAX_IMM;
1627
1628         swqe->descriptors = 0;
1629
1630         if (skb_is_gso(skb)) {
1631                 swqe->tx_control |= EHEA_SWQE_TSO;
1632                 swqe->mss = skb_shinfo(skb)->gso_size;
1633                 /*
1634                  * For TSO packets we only copy the headers into the
1635                  * immediate area.
1636                  */
1637                 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1638         }
1639
1640         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1641                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1642                 swqe->immediate_data_length = immediate_len;
1643
1644                 if (skb_data_size > immediate_len) {
1645                         sg1entry->l_key = lkey;
1646                         sg1entry->len = skb_data_size - immediate_len;
1647                         sg1entry->vaddr =
1648                                 ehea_map_vaddr(skb->data + immediate_len);
1649                         swqe->descriptors++;
1650                 }
1651         } else {
1652                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1653                 swqe->immediate_data_length = skb_data_size;
1654         }
1655 }
1656
1657 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1658                                     struct ehea_swqe *swqe, u32 lkey)
1659 {
1660         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1661         skb_frag_t *frag;
1662         int nfrags, sg1entry_contains_frag_data, i;
1663
1664         nfrags = skb_shinfo(skb)->nr_frags;
1665         sg1entry = &swqe->u.immdata_desc.sg_entry;
1666         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1667         sg1entry_contains_frag_data = 0;
1668
1669         write_swqe2_immediate(skb, swqe, lkey);
1670
1671         /* write descriptors */
1672         if (nfrags > 0) {
1673                 if (swqe->descriptors == 0) {
1674                         /* sg1entry not yet used */
1675                         frag = &skb_shinfo(skb)->frags[0];
1676
1677                         /* copy sg1entry data */
1678                         sg1entry->l_key = lkey;
1679                         sg1entry->len = frag->size;
1680                         sg1entry->vaddr =
1681                                 ehea_map_vaddr(skb_frag_address(frag));
1682                         swqe->descriptors++;
1683                         sg1entry_contains_frag_data = 1;
1684                 }
1685
1686                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1687
1688                         frag = &skb_shinfo(skb)->frags[i];
1689                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1690
1691                         sgentry->l_key = lkey;
1692                         sgentry->len = frag->size;
1693                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1694                         swqe->descriptors++;
1695                 }
1696         }
1697 }
1698
1699 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1700 {
1701         int ret = 0;
1702         u64 hret;
1703         u8 reg_type;
1704
1705         /* De/Register untagged packets */
1706         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1707         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1708                                      port->logical_port_id,
1709                                      reg_type, port->mac_addr, 0, hcallid);
1710         if (hret != H_SUCCESS) {
1711                 pr_err("%sregistering bc address failed (tagged)\n",
1712                        hcallid == H_REG_BCMC ? "" : "de");
1713                 ret = -EIO;
1714                 goto out_herr;
1715         }
1716
1717         /* De/Register VLAN packets */
1718         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1719         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1720                                      port->logical_port_id,
1721                                      reg_type, port->mac_addr, 0, hcallid);
1722         if (hret != H_SUCCESS) {
1723                 pr_err("%sregistering bc address failed (vlan)\n",
1724                        hcallid == H_REG_BCMC ? "" : "de");
1725                 ret = -EIO;
1726         }
1727 out_herr:
1728         return ret;
1729 }
1730
1731 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1732 {
1733         struct ehea_port *port = netdev_priv(dev);
1734         struct sockaddr *mac_addr = sa;
1735         struct hcp_ehea_port_cb0 *cb0;
1736         int ret;
1737         u64 hret;
1738
1739         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1740                 ret = -EADDRNOTAVAIL;
1741                 goto out;
1742         }
1743
1744         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1745         if (!cb0) {
1746                 pr_err("no mem for cb0\n");
1747                 ret = -ENOMEM;
1748                 goto out;
1749         }
1750
1751         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1752
1753         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1754
1755         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1756                                        port->logical_port_id, H_PORT_CB0,
1757                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1758         if (hret != H_SUCCESS) {
1759                 ret = -EIO;
1760                 goto out_free;
1761         }
1762
1763         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1764
1765         /* Deregister old MAC in pHYP */
1766         if (port->state == EHEA_PORT_UP) {
1767                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1768                 if (ret)
1769                         goto out_upregs;
1770         }
1771
1772         port->mac_addr = cb0->port_mac_addr << 16;
1773
1774         /* Register new MAC in pHYP */
1775         if (port->state == EHEA_PORT_UP) {
1776                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1777                 if (ret)
1778                         goto out_upregs;
1779         }
1780
1781         ret = 0;
1782
1783 out_upregs:
1784         ehea_update_bcmc_registrations();
1785 out_free:
1786         free_page((unsigned long)cb0);
1787 out:
1788         return ret;
1789 }
1790
1791 static void ehea_promiscuous_error(u64 hret, int enable)
1792 {
1793         if (hret == H_AUTHORITY)
1794                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1795                         enable == 1 ? "en" : "dis");
1796         else
1797                 pr_err("failed %sabling promiscuous mode\n",
1798                        enable == 1 ? "en" : "dis");
1799 }
1800
1801 static void ehea_promiscuous(struct net_device *dev, int enable)
1802 {
1803         struct ehea_port *port = netdev_priv(dev);
1804         struct hcp_ehea_port_cb7 *cb7;
1805         u64 hret;
1806
1807         if (enable == port->promisc)
1808                 return;
1809
1810         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1811         if (!cb7) {
1812                 pr_err("no mem for cb7\n");
1813                 goto out;
1814         }
1815
1816         /* Modify Pxs_DUCQPN in CB7 */
1817         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1818
1819         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1820                                        port->logical_port_id,
1821                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1822         if (hret) {
1823                 ehea_promiscuous_error(hret, enable);
1824                 goto out;
1825         }
1826
1827         port->promisc = enable;
1828 out:
1829         free_page((unsigned long)cb7);
1830 }
1831
1832 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1833                                      u32 hcallid)
1834 {
1835         u64 hret;
1836         u8 reg_type;
1837
1838         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1839                  | EHEA_BCMC_UNTAGGED;
1840
1841         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1842                                      port->logical_port_id,
1843                                      reg_type, mc_mac_addr, 0, hcallid);
1844         if (hret)
1845                 goto out;
1846
1847         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1848                  | EHEA_BCMC_VLANID_ALL;
1849
1850         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1851                                      port->logical_port_id,
1852                                      reg_type, mc_mac_addr, 0, hcallid);
1853 out:
1854         return hret;
1855 }
1856
1857 static int ehea_drop_multicast_list(struct net_device *dev)
1858 {
1859         struct ehea_port *port = netdev_priv(dev);
1860         struct ehea_mc_list *mc_entry = port->mc_list;
1861         struct list_head *pos;
1862         struct list_head *temp;
1863         int ret = 0;
1864         u64 hret;
1865
1866         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1867                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1868
1869                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1870                                                  H_DEREG_BCMC);
1871                 if (hret) {
1872                         pr_err("failed deregistering mcast MAC\n");
1873                         ret = -EIO;
1874                 }
1875
1876                 list_del(pos);
1877                 kfree(mc_entry);
1878         }
1879         return ret;
1880 }
1881
1882 static void ehea_allmulti(struct net_device *dev, int enable)
1883 {
1884         struct ehea_port *port = netdev_priv(dev);
1885         u64 hret;
1886
1887         if (!port->allmulti) {
1888                 if (enable) {
1889                         /* Enable ALLMULTI */
1890                         ehea_drop_multicast_list(dev);
1891                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1892                         if (!hret)
1893                                 port->allmulti = 1;
1894                         else
1895                                 netdev_err(dev,
1896                                            "failed enabling IFF_ALLMULTI\n");
1897                 }
1898         } else
1899                 if (!enable) {
1900                         /* Disable ALLMULTI */
1901                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1902                         if (!hret)
1903                                 port->allmulti = 0;
1904                         else
1905                                 netdev_err(dev,
1906                                            "failed disabling IFF_ALLMULTI\n");
1907                 }
1908 }
1909
1910 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1911 {
1912         struct ehea_mc_list *ehea_mcl_entry;
1913         u64 hret;
1914
1915         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1916         if (!ehea_mcl_entry) {
1917                 pr_err("no mem for mcl_entry\n");
1918                 return;
1919         }
1920
1921         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1922
1923         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1924
1925         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1926                                          H_REG_BCMC);
1927         if (!hret)
1928                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1929         else {
1930                 pr_err("failed registering mcast MAC\n");
1931                 kfree(ehea_mcl_entry);
1932         }
1933 }
1934
1935 static void ehea_set_multicast_list(struct net_device *dev)
1936 {
1937         struct ehea_port *port = netdev_priv(dev);
1938         struct netdev_hw_addr *ha;
1939         int ret;
1940
1941         if (port->promisc) {
1942                 ehea_promiscuous(dev, 1);
1943                 return;
1944         }
1945         ehea_promiscuous(dev, 0);
1946
1947         if (dev->flags & IFF_ALLMULTI) {
1948                 ehea_allmulti(dev, 1);
1949                 goto out;
1950         }
1951         ehea_allmulti(dev, 0);
1952
1953         if (!netdev_mc_empty(dev)) {
1954                 ret = ehea_drop_multicast_list(dev);
1955                 if (ret) {
1956                         /* Dropping the current multicast list failed.
1957                          * Enabling ALL_MULTI is the best we can do.
1958                          */
1959                         ehea_allmulti(dev, 1);
1960                 }
1961
1962                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1963                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1964                                 port->adapter->max_mc_mac);
1965                         goto out;
1966                 }
1967
1968                 netdev_for_each_mc_addr(ha, dev)
1969                         ehea_add_multicast_entry(port, ha->addr);
1970
1971         }
1972 out:
1973         ehea_update_bcmc_registrations();
1974 }
1975
1976 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1977 {
1978         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1979                 return -EINVAL;
1980         dev->mtu = new_mtu;
1981         return 0;
1982 }
1983
1984 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1985 {
1986         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1987
1988         if (skb->protocol != htons(ETH_P_IP))
1989                 return;
1990
1991         if (skb->ip_summed == CHECKSUM_PARTIAL)
1992                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1993
1994         swqe->ip_start = skb_network_offset(skb);
1995         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1996
1997         switch (ip_hdr(skb)->protocol) {
1998         case IPPROTO_UDP:
1999                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2000                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2001
2002                 swqe->tcp_offset = swqe->ip_end + 1 +
2003                                    offsetof(struct udphdr, check);
2004                 swqe->tcp_end = skb->len - 1;
2005                 break;
2006
2007         case IPPROTO_TCP:
2008                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2009                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2010
2011                 swqe->tcp_offset = swqe->ip_end + 1 +
2012                                    offsetof(struct tcphdr, check);
2013                 swqe->tcp_end = skb->len - 1;
2014                 break;
2015         }
2016 }
2017
2018 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2019                        struct ehea_swqe *swqe, u32 lkey)
2020 {
2021         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2022
2023         xmit_common(skb, swqe);
2024
2025         write_swqe2_data(skb, dev, swqe, lkey);
2026 }
2027
2028 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2029                        struct ehea_swqe *swqe)
2030 {
2031         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2032
2033         xmit_common(skb, swqe);
2034
2035         if (!skb->data_len)
2036                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2037         else
2038                 skb_copy_bits(skb, 0, imm_data, skb->len);
2039
2040         swqe->immediate_data_length = skb->len;
2041         dev_kfree_skb(skb);
2042 }
2043
2044 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2045 {
2046         struct ehea_port *port = netdev_priv(dev);
2047         struct ehea_swqe *swqe;
2048         u32 lkey;
2049         int swqe_index;
2050         struct ehea_port_res *pr;
2051         struct netdev_queue *txq;
2052
2053         pr = &port->port_res[skb_get_queue_mapping(skb)];
2054         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2055
2056         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2057         memset(swqe, 0, SWQE_HEADER_SIZE);
2058         atomic_dec(&pr->swqe_avail);
2059
2060         if (vlan_tx_tag_present(skb)) {
2061                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2062                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2063         }
2064
2065         pr->tx_packets++;
2066         pr->tx_bytes += skb->len;
2067
2068         if (skb->len <= SWQE3_MAX_IMM) {
2069                 u32 sig_iv = port->sig_comp_iv;
2070                 u32 swqe_num = pr->swqe_id_counter;
2071                 ehea_xmit3(skb, dev, swqe);
2072                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2073                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2074                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2075                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2076                                                       sig_iv);
2077                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2078                         pr->swqe_ll_count = 0;
2079                 } else
2080                         pr->swqe_ll_count += 1;
2081         } else {
2082                 swqe->wr_id =
2083                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2084                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2085                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2086                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2087                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2088
2089                 pr->sq_skba.index++;
2090                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2091
2092                 lkey = pr->send_mr.lkey;
2093                 ehea_xmit2(skb, dev, swqe, lkey);
2094                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2095         }
2096         pr->swqe_id_counter += 1;
2097
2098         netif_info(port, tx_queued, dev,
2099                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2100         if (netif_msg_tx_queued(port))
2101                 ehea_dump(swqe, 512, "swqe");
2102
2103         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2104                 netif_tx_stop_queue(txq);
2105                 swqe->tx_control |= EHEA_SWQE_PURGE;
2106         }
2107
2108         ehea_post_swqe(pr->qp, swqe);
2109
2110         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2111                 pr->p_stats.queue_stopped++;
2112                 netif_tx_stop_queue(txq);
2113         }
2114
2115         return NETDEV_TX_OK;
2116 }
2117
2118 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2119 {
2120         struct ehea_port *port = netdev_priv(dev);
2121         struct ehea_adapter *adapter = port->adapter;
2122         struct hcp_ehea_port_cb1 *cb1;
2123         int index;
2124         u64 hret;
2125
2126         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2127         if (!cb1) {
2128                 pr_err("no mem for cb1\n");
2129                 goto out;
2130         }
2131
2132         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2133                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2134         if (hret != H_SUCCESS) {
2135                 pr_err("query_ehea_port failed\n");
2136                 goto out;
2137         }
2138
2139         index = (vid / 64);
2140         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2141
2142         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2143                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2144         if (hret != H_SUCCESS)
2145                 pr_err("modify_ehea_port failed\n");
2146 out:
2147         free_page((unsigned long)cb1);
2148         return;
2149 }
2150
2151 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2152 {
2153         struct ehea_port *port = netdev_priv(dev);
2154         struct ehea_adapter *adapter = port->adapter;
2155         struct hcp_ehea_port_cb1 *cb1;
2156         int index;
2157         u64 hret;
2158
2159         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2160         if (!cb1) {
2161                 pr_err("no mem for cb1\n");
2162                 goto out;
2163         }
2164
2165         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2166                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2167         if (hret != H_SUCCESS) {
2168                 pr_err("query_ehea_port failed\n");
2169                 goto out;
2170         }
2171
2172         index = (vid / 64);
2173         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2174
2175         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2176                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2177         if (hret != H_SUCCESS)
2178                 pr_err("modify_ehea_port failed\n");
2179 out:
2180         free_page((unsigned long)cb1);
2181 }
2182
2183 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2184 {
2185         int ret = -EIO;
2186         u64 hret;
2187         u16 dummy16 = 0;
2188         u64 dummy64 = 0;
2189         struct hcp_modify_qp_cb0 *cb0;
2190
2191         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2192         if (!cb0) {
2193                 ret = -ENOMEM;
2194                 goto out;
2195         }
2196
2197         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2198                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2199         if (hret != H_SUCCESS) {
2200                 pr_err("query_ehea_qp failed (1)\n");
2201                 goto out;
2202         }
2203
2204         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2205         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2206                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2207                                      &dummy64, &dummy64, &dummy16, &dummy16);
2208         if (hret != H_SUCCESS) {
2209                 pr_err("modify_ehea_qp failed (1)\n");
2210                 goto out;
2211         }
2212
2213         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2214                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2215         if (hret != H_SUCCESS) {
2216                 pr_err("query_ehea_qp failed (2)\n");
2217                 goto out;
2218         }
2219
2220         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2221         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2222                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2223                                      &dummy64, &dummy64, &dummy16, &dummy16);
2224         if (hret != H_SUCCESS) {
2225                 pr_err("modify_ehea_qp failed (2)\n");
2226                 goto out;
2227         }
2228
2229         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2230                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2231         if (hret != H_SUCCESS) {
2232                 pr_err("query_ehea_qp failed (3)\n");
2233                 goto out;
2234         }
2235
2236         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2237         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2238                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2239                                      &dummy64, &dummy64, &dummy16, &dummy16);
2240         if (hret != H_SUCCESS) {
2241                 pr_err("modify_ehea_qp failed (3)\n");
2242                 goto out;
2243         }
2244
2245         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2246                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2247         if (hret != H_SUCCESS) {
2248                 pr_err("query_ehea_qp failed (4)\n");
2249                 goto out;
2250         }
2251
2252         ret = 0;
2253 out:
2254         free_page((unsigned long)cb0);
2255         return ret;
2256 }
2257
2258 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2259 {
2260         int ret, i;
2261         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2262         enum ehea_eq_type eq_type = EHEA_EQ;
2263
2264         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2265                                    EHEA_MAX_ENTRIES_EQ, 1);
2266         if (!port->qp_eq) {
2267                 ret = -EINVAL;
2268                 pr_err("ehea_create_eq failed (qp_eq)\n");
2269                 goto out_kill_eq;
2270         }
2271
2272         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2273         pr_cfg.max_entries_scq = sq_entries * 2;
2274         pr_cfg.max_entries_sq = sq_entries;
2275         pr_cfg.max_entries_rq1 = rq1_entries;
2276         pr_cfg.max_entries_rq2 = rq2_entries;
2277         pr_cfg.max_entries_rq3 = rq3_entries;
2278
2279         pr_cfg_small_rx.max_entries_rcq = 1;
2280         pr_cfg_small_rx.max_entries_scq = sq_entries;
2281         pr_cfg_small_rx.max_entries_sq = sq_entries;
2282         pr_cfg_small_rx.max_entries_rq1 = 1;
2283         pr_cfg_small_rx.max_entries_rq2 = 1;
2284         pr_cfg_small_rx.max_entries_rq3 = 1;
2285
2286         for (i = 0; i < def_qps; i++) {
2287                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2288                 if (ret)
2289                         goto out_clean_pr;
2290         }
2291         for (i = def_qps; i < def_qps; i++) {
2292                 ret = ehea_init_port_res(port, &port->port_res[i],
2293                                          &pr_cfg_small_rx, i);
2294                 if (ret)
2295                         goto out_clean_pr;
2296         }
2297
2298         return 0;
2299
2300 out_clean_pr:
2301         while (--i >= 0)
2302                 ehea_clean_portres(port, &port->port_res[i]);
2303
2304 out_kill_eq:
2305         ehea_destroy_eq(port->qp_eq);
2306         return ret;
2307 }
2308
2309 static int ehea_clean_all_portres(struct ehea_port *port)
2310 {
2311         int ret = 0;
2312         int i;
2313
2314         for (i = 0; i < port->num_def_qps; i++)
2315                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2316
2317         ret |= ehea_destroy_eq(port->qp_eq);
2318
2319         return ret;
2320 }
2321
2322 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2323 {
2324         if (adapter->active_ports)
2325                 return;
2326
2327         ehea_rem_mr(&adapter->mr);
2328 }
2329
2330 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2331 {
2332         if (adapter->active_ports)
2333                 return 0;
2334
2335         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2336 }
2337
2338 static int ehea_up(struct net_device *dev)
2339 {
2340         int ret, i;
2341         struct ehea_port *port = netdev_priv(dev);
2342
2343         if (port->state == EHEA_PORT_UP)
2344                 return 0;
2345
2346         ret = ehea_port_res_setup(port, port->num_def_qps);
2347         if (ret) {
2348                 netdev_err(dev, "port_res_failed\n");
2349                 goto out;
2350         }
2351
2352         /* Set default QP for this port */
2353         ret = ehea_configure_port(port);
2354         if (ret) {
2355                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2356                 goto out_clean_pr;
2357         }
2358
2359         ret = ehea_reg_interrupts(dev);
2360         if (ret) {
2361                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2362                 goto out_clean_pr;
2363         }
2364
2365         for (i = 0; i < port->num_def_qps; i++) {
2366                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2367                 if (ret) {
2368                         netdev_err(dev, "activate_qp failed\n");
2369                         goto out_free_irqs;
2370                 }
2371         }
2372
2373         for (i = 0; i < port->num_def_qps; i++) {
2374                 ret = ehea_fill_port_res(&port->port_res[i]);
2375                 if (ret) {
2376                         netdev_err(dev, "out_free_irqs\n");
2377                         goto out_free_irqs;
2378                 }
2379         }
2380
2381         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2382         if (ret) {
2383                 ret = -EIO;
2384                 goto out_free_irqs;
2385         }
2386
2387         port->state = EHEA_PORT_UP;
2388
2389         ret = 0;
2390         goto out;
2391
2392 out_free_irqs:
2393         ehea_free_interrupts(dev);
2394
2395 out_clean_pr:
2396         ehea_clean_all_portres(port);
2397 out:
2398         if (ret)
2399                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2400
2401         ehea_update_bcmc_registrations();
2402         ehea_update_firmware_handles();
2403
2404         return ret;
2405 }
2406
2407 static void port_napi_disable(struct ehea_port *port)
2408 {
2409         int i;
2410
2411         for (i = 0; i < port->num_def_qps; i++)
2412                 napi_disable(&port->port_res[i].napi);
2413 }
2414
2415 static void port_napi_enable(struct ehea_port *port)
2416 {
2417         int i;
2418
2419         for (i = 0; i < port->num_def_qps; i++)
2420                 napi_enable(&port->port_res[i].napi);
2421 }
2422
2423 static int ehea_open(struct net_device *dev)
2424 {
2425         int ret;
2426         struct ehea_port *port = netdev_priv(dev);
2427
2428         mutex_lock(&port->port_lock);
2429
2430         netif_info(port, ifup, dev, "enabling port\n");
2431
2432         ret = ehea_up(dev);
2433         if (!ret) {
2434                 port_napi_enable(port);
2435                 netif_tx_start_all_queues(dev);
2436         }
2437
2438         mutex_unlock(&port->port_lock);
2439         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
2440
2441         return ret;
2442 }
2443
2444 static int ehea_down(struct net_device *dev)
2445 {
2446         int ret;
2447         struct ehea_port *port = netdev_priv(dev);
2448
2449         if (port->state == EHEA_PORT_DOWN)
2450                 return 0;
2451
2452         ehea_drop_multicast_list(dev);
2453         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2454
2455         ehea_free_interrupts(dev);
2456
2457         port->state = EHEA_PORT_DOWN;
2458
2459         ehea_update_bcmc_registrations();
2460
2461         ret = ehea_clean_all_portres(port);
2462         if (ret)
2463                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2464
2465         ehea_update_firmware_handles();
2466
2467         return ret;
2468 }
2469
2470 static int ehea_stop(struct net_device *dev)
2471 {
2472         int ret;
2473         struct ehea_port *port = netdev_priv(dev);
2474
2475         netif_info(port, ifdown, dev, "disabling port\n");
2476
2477         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2478         cancel_work_sync(&port->reset_task);
2479         cancel_delayed_work_sync(&port->stats_work);
2480         mutex_lock(&port->port_lock);
2481         netif_tx_stop_all_queues(dev);
2482         port_napi_disable(port);
2483         ret = ehea_down(dev);
2484         mutex_unlock(&port->port_lock);
2485         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2486         return ret;
2487 }
2488
2489 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2490 {
2491         struct ehea_qp qp = *orig_qp;
2492         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2493         struct ehea_swqe *swqe;
2494         int wqe_index;
2495         int i;
2496
2497         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2498                 swqe = ehea_get_swqe(&qp, &wqe_index);
2499                 swqe->tx_control |= EHEA_SWQE_PURGE;
2500         }
2501 }
2502
2503 static void ehea_flush_sq(struct ehea_port *port)
2504 {
2505         int i;
2506
2507         for (i = 0; i < port->num_def_qps; i++) {
2508                 struct ehea_port_res *pr = &port->port_res[i];
2509                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2510                 int ret;
2511
2512                 ret = wait_event_timeout(port->swqe_avail_wq,
2513                          atomic_read(&pr->swqe_avail) >= swqe_max,
2514                          msecs_to_jiffies(100));
2515
2516                 if (!ret) {
2517                         pr_err("WARNING: sq not flushed completely\n");
2518                         break;
2519                 }
2520         }
2521 }
2522
2523 int ehea_stop_qps(struct net_device *dev)
2524 {
2525         struct ehea_port *port = netdev_priv(dev);
2526         struct ehea_adapter *adapter = port->adapter;
2527         struct hcp_modify_qp_cb0 *cb0;
2528         int ret = -EIO;
2529         int dret;
2530         int i;
2531         u64 hret;
2532         u64 dummy64 = 0;
2533         u16 dummy16 = 0;
2534
2535         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2536         if (!cb0) {
2537                 ret = -ENOMEM;
2538                 goto out;
2539         }
2540
2541         for (i = 0; i < (port->num_def_qps); i++) {
2542                 struct ehea_port_res *pr =  &port->port_res[i];
2543                 struct ehea_qp *qp = pr->qp;
2544
2545                 /* Purge send queue */
2546                 ehea_purge_sq(qp);
2547
2548                 /* Disable queue pair */
2549                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2550                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2551                                             cb0);
2552                 if (hret != H_SUCCESS) {
2553                         pr_err("query_ehea_qp failed (1)\n");
2554                         goto out;
2555                 }
2556
2557                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2558                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2559
2560                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2561                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2562                                                             1), cb0, &dummy64,
2563                                              &dummy64, &dummy16, &dummy16);
2564                 if (hret != H_SUCCESS) {
2565                         pr_err("modify_ehea_qp failed (1)\n");
2566                         goto out;
2567                 }
2568
2569                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2570                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2571                                             cb0);
2572                 if (hret != H_SUCCESS) {
2573                         pr_err("query_ehea_qp failed (2)\n");
2574                         goto out;
2575                 }
2576
2577                 /* deregister shared memory regions */
2578                 dret = ehea_rem_smrs(pr);
2579                 if (dret) {
2580                         pr_err("unreg shared memory region failed\n");
2581                         goto out;
2582                 }
2583         }
2584
2585         ret = 0;
2586 out:
2587         free_page((unsigned long)cb0);
2588
2589         return ret;
2590 }
2591
2592 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2593 {
2594         struct ehea_qp qp = *orig_qp;
2595         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2596         struct ehea_rwqe *rwqe;
2597         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2598         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2599         struct sk_buff *skb;
2600         u32 lkey = pr->recv_mr.lkey;
2601
2602
2603         int i;
2604         int index;
2605
2606         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2607                 rwqe = ehea_get_next_rwqe(&qp, 2);
2608                 rwqe->sg_list[0].l_key = lkey;
2609                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2610                 skb = skba_rq2[index];
2611                 if (skb)
2612                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2613         }
2614
2615         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2616                 rwqe = ehea_get_next_rwqe(&qp, 3);
2617                 rwqe->sg_list[0].l_key = lkey;
2618                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2619                 skb = skba_rq3[index];
2620                 if (skb)
2621                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2622         }
2623 }
2624
2625 int ehea_restart_qps(struct net_device *dev)
2626 {
2627         struct ehea_port *port = netdev_priv(dev);
2628         struct ehea_adapter *adapter = port->adapter;
2629         int ret = 0;
2630         int i;
2631
2632         struct hcp_modify_qp_cb0 *cb0;
2633         u64 hret;
2634         u64 dummy64 = 0;
2635         u16 dummy16 = 0;
2636
2637         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2638         if (!cb0) {
2639                 ret = -ENOMEM;
2640                 goto out;
2641         }
2642
2643         for (i = 0; i < (port->num_def_qps); i++) {
2644                 struct ehea_port_res *pr =  &port->port_res[i];
2645                 struct ehea_qp *qp = pr->qp;
2646
2647                 ret = ehea_gen_smrs(pr);
2648                 if (ret) {
2649                         netdev_err(dev, "creation of shared memory regions failed\n");
2650                         goto out;
2651                 }
2652
2653                 ehea_update_rqs(qp, pr);
2654
2655                 /* Enable queue pair */
2656                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2657                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2658                                             cb0);
2659                 if (hret != H_SUCCESS) {
2660                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2661                         goto out;
2662                 }
2663
2664                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2665                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2666
2667                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2668                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2669                                                             1), cb0, &dummy64,
2670                                              &dummy64, &dummy16, &dummy16);
2671                 if (hret != H_SUCCESS) {
2672                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2673                         goto out;
2674                 }
2675
2676                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2677                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2678                                             cb0);
2679                 if (hret != H_SUCCESS) {
2680                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2681                         goto out;
2682                 }
2683
2684                 /* refill entire queue */
2685                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2686                 ehea_refill_rq2(pr, 0);
2687                 ehea_refill_rq3(pr, 0);
2688         }
2689 out:
2690         free_page((unsigned long)cb0);
2691
2692         return ret;
2693 }
2694
2695 static void ehea_reset_port(struct work_struct *work)
2696 {
2697         int ret;
2698         struct ehea_port *port =
2699                 container_of(work, struct ehea_port, reset_task);
2700         struct net_device *dev = port->netdev;
2701
2702         mutex_lock(&dlpar_mem_lock);
2703         port->resets++;
2704         mutex_lock(&port->port_lock);
2705         netif_tx_disable(dev);
2706
2707         port_napi_disable(port);
2708
2709         ehea_down(dev);
2710
2711         ret = ehea_up(dev);
2712         if (ret)
2713                 goto out;
2714
2715         ehea_set_multicast_list(dev);
2716
2717         netif_info(port, timer, dev, "reset successful\n");
2718
2719         port_napi_enable(port);
2720
2721         netif_tx_wake_all_queues(dev);
2722 out:
2723         mutex_unlock(&port->port_lock);
2724         mutex_unlock(&dlpar_mem_lock);
2725 }
2726
2727 static void ehea_rereg_mrs(void)
2728 {
2729         int ret, i;
2730         struct ehea_adapter *adapter;
2731
2732         pr_info("LPAR memory changed - re-initializing driver\n");
2733
2734         list_for_each_entry(adapter, &adapter_list, list)
2735                 if (adapter->active_ports) {
2736                         /* Shutdown all ports */
2737                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2738                                 struct ehea_port *port = adapter->port[i];
2739                                 struct net_device *dev;
2740
2741                                 if (!port)
2742                                         continue;
2743
2744                                 dev = port->netdev;
2745
2746                                 if (dev->flags & IFF_UP) {
2747                                         mutex_lock(&port->port_lock);
2748                                         netif_tx_disable(dev);
2749                                         ehea_flush_sq(port);
2750                                         ret = ehea_stop_qps(dev);
2751                                         if (ret) {
2752                                                 mutex_unlock(&port->port_lock);
2753                                                 goto out;
2754                                         }
2755                                         port_napi_disable(port);
2756                                         mutex_unlock(&port->port_lock);
2757                                 }
2758                                 reset_sq_restart_flag(port);
2759                         }
2760
2761                         /* Unregister old memory region */
2762                         ret = ehea_rem_mr(&adapter->mr);
2763                         if (ret) {
2764                                 pr_err("unregister MR failed - driver inoperable!\n");
2765                                 goto out;
2766                         }
2767                 }
2768
2769         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2770
2771         list_for_each_entry(adapter, &adapter_list, list)
2772                 if (adapter->active_ports) {
2773                         /* Register new memory region */
2774                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2775                         if (ret) {
2776                                 pr_err("register MR failed - driver inoperable!\n");
2777                                 goto out;
2778                         }
2779
2780                         /* Restart all ports */
2781                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2782                                 struct ehea_port *port = adapter->port[i];
2783
2784                                 if (port) {
2785                                         struct net_device *dev = port->netdev;
2786
2787                                         if (dev->flags & IFF_UP) {
2788                                                 mutex_lock(&port->port_lock);
2789                                                 ret = ehea_restart_qps(dev);
2790                                                 if (!ret) {
2791                                                         check_sqs(port);
2792                                                         port_napi_enable(port);
2793                                                         netif_tx_wake_all_queues(dev);
2794                                                 } else {
2795                                                         netdev_err(dev, "Unable to restart QPS\n");
2796                                                 }
2797                                                 mutex_unlock(&port->port_lock);
2798                                         }
2799                                 }
2800                         }
2801                 }
2802         pr_info("re-initializing driver complete\n");
2803 out:
2804         return;
2805 }
2806
2807 static void ehea_tx_watchdog(struct net_device *dev)
2808 {
2809         struct ehea_port *port = netdev_priv(dev);
2810
2811         if (netif_carrier_ok(dev) &&
2812             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2813                 ehea_schedule_port_reset(port);
2814 }
2815
2816 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2817 {
2818         struct hcp_query_ehea *cb;
2819         u64 hret;
2820         int ret;
2821
2822         cb = (void *)get_zeroed_page(GFP_KERNEL);
2823         if (!cb) {
2824                 ret = -ENOMEM;
2825                 goto out;
2826         }
2827
2828         hret = ehea_h_query_ehea(adapter->handle, cb);
2829
2830         if (hret != H_SUCCESS) {
2831                 ret = -EIO;
2832                 goto out_herr;
2833         }
2834
2835         adapter->max_mc_mac = cb->max_mc_mac - 1;
2836         ret = 0;
2837
2838 out_herr:
2839         free_page((unsigned long)cb);
2840 out:
2841         return ret;
2842 }
2843
2844 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2845 {
2846         struct hcp_ehea_port_cb4 *cb4;
2847         u64 hret;
2848         int ret = 0;
2849
2850         *jumbo = 0;
2851
2852         /* (Try to) enable *jumbo frames */
2853         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2854         if (!cb4) {
2855                 pr_err("no mem for cb4\n");
2856                 ret = -ENOMEM;
2857                 goto out;
2858         } else {
2859                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2860                                               port->logical_port_id,
2861                                               H_PORT_CB4,
2862                                               H_PORT_CB4_JUMBO, cb4);
2863                 if (hret == H_SUCCESS) {
2864                         if (cb4->jumbo_frame)
2865                                 *jumbo = 1;
2866                         else {
2867                                 cb4->jumbo_frame = 1;
2868                                 hret = ehea_h_modify_ehea_port(port->adapter->
2869                                                                handle,
2870                                                                port->
2871                                                                logical_port_id,
2872                                                                H_PORT_CB4,
2873                                                                H_PORT_CB4_JUMBO,
2874                                                                cb4);
2875                                 if (hret == H_SUCCESS)
2876                                         *jumbo = 1;
2877                         }
2878                 } else
2879                         ret = -EINVAL;
2880
2881                 free_page((unsigned long)cb4);
2882         }
2883 out:
2884         return ret;
2885 }
2886
2887 static ssize_t ehea_show_port_id(struct device *dev,
2888                                  struct device_attribute *attr, char *buf)
2889 {
2890         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2891         return sprintf(buf, "%d", port->logical_port_id);
2892 }
2893
2894 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2895                    NULL);
2896
2897 static void __devinit logical_port_release(struct device *dev)
2898 {
2899         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2900         of_node_put(port->ofdev.dev.of_node);
2901 }
2902
2903 static struct device *ehea_register_port(struct ehea_port *port,
2904                                          struct device_node *dn)
2905 {
2906         int ret;
2907
2908         port->ofdev.dev.of_node = of_node_get(dn);
2909         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2910         port->ofdev.dev.bus = &ibmebus_bus_type;
2911
2912         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2913         port->ofdev.dev.release = logical_port_release;
2914
2915         ret = of_device_register(&port->ofdev);
2916         if (ret) {
2917                 pr_err("failed to register device. ret=%d\n", ret);
2918                 goto out;
2919         }
2920
2921         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2922         if (ret) {
2923                 pr_err("failed to register attributes, ret=%d\n", ret);
2924                 goto out_unreg_of_dev;
2925         }
2926
2927         return &port->ofdev.dev;
2928
2929 out_unreg_of_dev:
2930         of_device_unregister(&port->ofdev);
2931 out:
2932         return NULL;
2933 }
2934
2935 static void ehea_unregister_port(struct ehea_port *port)
2936 {
2937         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2938         of_device_unregister(&port->ofdev);
2939 }
2940
2941 static const struct net_device_ops ehea_netdev_ops = {
2942         .ndo_open               = ehea_open,
2943         .ndo_stop               = ehea_stop,
2944         .ndo_start_xmit         = ehea_start_xmit,
2945 #ifdef CONFIG_NET_POLL_CONTROLLER
2946         .ndo_poll_controller    = ehea_netpoll,
2947 #endif
2948         .ndo_get_stats64        = ehea_get_stats64,
2949         .ndo_set_mac_address    = ehea_set_mac_addr,
2950         .ndo_validate_addr      = eth_validate_addr,
2951         .ndo_set_rx_mode        = ehea_set_multicast_list,
2952         .ndo_change_mtu         = ehea_change_mtu,
2953         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2954         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2955         .ndo_tx_timeout         = ehea_tx_watchdog,
2956 };
2957
2958 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2959                                          u32 logical_port_id,
2960                                          struct device_node *dn)
2961 {
2962         int ret;
2963         struct net_device *dev;
2964         struct ehea_port *port;
2965         struct device *port_dev;
2966         int jumbo;
2967
2968         /* allocate memory for the port structures */
2969         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2970
2971         if (!dev) {
2972                 pr_err("no mem for net_device\n");
2973                 ret = -ENOMEM;
2974                 goto out_err;
2975         }
2976
2977         port = netdev_priv(dev);
2978
2979         mutex_init(&port->port_lock);
2980         port->state = EHEA_PORT_DOWN;
2981         port->sig_comp_iv = sq_entries / 10;
2982
2983         port->adapter = adapter;
2984         port->netdev = dev;
2985         port->logical_port_id = logical_port_id;
2986
2987         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2988
2989         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2990         if (!port->mc_list) {
2991                 ret = -ENOMEM;
2992                 goto out_free_ethdev;
2993         }
2994
2995         INIT_LIST_HEAD(&port->mc_list->list);
2996
2997         ret = ehea_sense_port_attr(port);
2998         if (ret)
2999                 goto out_free_mc_list;
3000
3001         netif_set_real_num_rx_queues(dev, port->num_def_qps);
3002         netif_set_real_num_tx_queues(dev, port->num_def_qps);
3003
3004         port_dev = ehea_register_port(port, dn);
3005         if (!port_dev)
3006                 goto out_free_mc_list;
3007
3008         SET_NETDEV_DEV(dev, port_dev);
3009
3010         /* initialize net_device structure */
3011         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3012
3013         dev->netdev_ops = &ehea_netdev_ops;
3014         ehea_set_ethtool_ops(dev);
3015
3016         dev->hw_features = NETIF_F_SG | NETIF_F_TSO
3017                       | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3018         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3019                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3020                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3021                       | NETIF_F_RXCSUM;
3022         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3023                         NETIF_F_IP_CSUM;
3024         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3025
3026         INIT_WORK(&port->reset_task, ehea_reset_port);
3027         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3028
3029         init_waitqueue_head(&port->swqe_avail_wq);
3030         init_waitqueue_head(&port->restart_wq);
3031
3032         memset(&port->stats, 0, sizeof(struct net_device_stats));
3033         ret = register_netdev(dev);
3034         if (ret) {
3035                 pr_err("register_netdev failed. ret=%d\n", ret);
3036                 goto out_unreg_port;
3037         }
3038
3039         ret = ehea_get_jumboframe_status(port, &jumbo);
3040         if (ret)
3041                 netdev_err(dev, "failed determining jumbo frame status\n");
3042
3043         netdev_info(dev, "Jumbo frames are %sabled\n",
3044                     jumbo == 1 ? "en" : "dis");
3045
3046         adapter->active_ports++;
3047
3048         return port;
3049
3050 out_unreg_port:
3051         ehea_unregister_port(port);
3052
3053 out_free_mc_list:
3054         kfree(port->mc_list);
3055
3056 out_free_ethdev:
3057         free_netdev(dev);
3058
3059 out_err:
3060         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3061                logical_port_id, ret);
3062         return NULL;
3063 }
3064
3065 static void ehea_shutdown_single_port(struct ehea_port *port)
3066 {
3067         struct ehea_adapter *adapter = port->adapter;
3068
3069         cancel_work_sync(&port->reset_task);
3070         cancel_delayed_work_sync(&port->stats_work);
3071         unregister_netdev(port->netdev);
3072         ehea_unregister_port(port);
3073         kfree(port->mc_list);
3074         free_netdev(port->netdev);
3075         adapter->active_ports--;
3076 }
3077
3078 static int ehea_setup_ports(struct ehea_adapter *adapter)
3079 {
3080         struct device_node *lhea_dn;
3081         struct device_node *eth_dn = NULL;
3082
3083         const u32 *dn_log_port_id;
3084         int i = 0;
3085
3086         lhea_dn = adapter->ofdev->dev.of_node;
3087         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3088
3089                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3090                                                  NULL);
3091                 if (!dn_log_port_id) {
3092                         pr_err("bad device node: eth_dn name=%s\n",
3093                                eth_dn->full_name);
3094                         continue;
3095                 }
3096
3097                 if (ehea_add_adapter_mr(adapter)) {
3098                         pr_err("creating MR failed\n");
3099                         of_node_put(eth_dn);
3100                         return -EIO;
3101                 }
3102
3103                 adapter->port[i] = ehea_setup_single_port(adapter,
3104                                                           *dn_log_port_id,
3105                                                           eth_dn);
3106                 if (adapter->port[i])
3107                         netdev_info(adapter->port[i]->netdev,
3108                                     "logical port id #%d\n", *dn_log_port_id);
3109                 else
3110                         ehea_remove_adapter_mr(adapter);
3111
3112                 i++;
3113         }
3114         return 0;
3115 }
3116
3117 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3118                                            u32 logical_port_id)
3119 {
3120         struct device_node *lhea_dn;
3121         struct device_node *eth_dn = NULL;
3122         const u32 *dn_log_port_id;
3123
3124         lhea_dn = adapter->ofdev->dev.of_node;
3125         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3126
3127                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3128                                                  NULL);
3129                 if (dn_log_port_id)
3130                         if (*dn_log_port_id == logical_port_id)
3131                                 return eth_dn;
3132         }
3133
3134         return NULL;
3135 }
3136
3137 static ssize_t ehea_probe_port(struct device *dev,
3138                                struct device_attribute *attr,
3139                                const char *buf, size_t count)
3140 {
3141         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3142         struct ehea_port *port;
3143         struct device_node *eth_dn = NULL;
3144         int i;
3145
3146         u32 logical_port_id;
3147
3148         sscanf(buf, "%d", &logical_port_id);
3149
3150         port = ehea_get_port(adapter, logical_port_id);
3151
3152         if (port) {
3153                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3154                             logical_port_id);
3155                 return -EINVAL;
3156         }
3157
3158         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3159
3160         if (!eth_dn) {
3161                 pr_info("no logical port with id %d found\n", logical_port_id);
3162                 return -EINVAL;
3163         }
3164
3165         if (ehea_add_adapter_mr(adapter)) {
3166                 pr_err("creating MR failed\n");
3167                 return -EIO;
3168         }
3169
3170         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3171
3172         of_node_put(eth_dn);
3173
3174         if (port) {
3175                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3176                         if (!adapter->port[i]) {
3177                                 adapter->port[i] = port;
3178                                 break;
3179                         }
3180
3181                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3182                             logical_port_id);
3183         } else {
3184                 ehea_remove_adapter_mr(adapter);
3185                 return -EIO;
3186         }
3187
3188         return (ssize_t) count;
3189 }
3190
3191 static ssize_t ehea_remove_port(struct device *dev,
3192                                 struct device_attribute *attr,
3193                                 const char *buf, size_t count)
3194 {
3195         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3196         struct ehea_port *port;
3197         int i;
3198         u32 logical_port_id;
3199
3200         sscanf(buf, "%d", &logical_port_id);
3201
3202         port = ehea_get_port(adapter, logical_port_id);
3203
3204         if (port) {
3205                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3206                             logical_port_id);
3207
3208                 ehea_shutdown_single_port(port);
3209
3210                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3211                         if (adapter->port[i] == port) {
3212                                 adapter->port[i] = NULL;
3213                                 break;
3214                         }
3215         } else {
3216                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3217                        logical_port_id);
3218                 return -EINVAL;
3219         }
3220
3221         ehea_remove_adapter_mr(adapter);
3222
3223         return (ssize_t) count;
3224 }
3225
3226 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3227 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3228
3229 int ehea_create_device_sysfs(struct platform_device *dev)
3230 {
3231         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3232         if (ret)
3233                 goto out;
3234
3235         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3236 out:
3237         return ret;
3238 }
3239
3240 void ehea_remove_device_sysfs(struct platform_device *dev)
3241 {
3242         device_remove_file(&dev->dev, &dev_attr_probe_port);
3243         device_remove_file(&dev->dev, &dev_attr_remove_port);
3244 }
3245
3246 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3247                                         const struct of_device_id *id)
3248 {
3249         struct ehea_adapter *adapter;
3250         const u64 *adapter_handle;
3251         int ret;
3252
3253         if (!dev || !dev->dev.of_node) {
3254                 pr_err("Invalid ibmebus device probed\n");
3255                 return -EINVAL;
3256         }
3257
3258         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3259         if (!adapter) {
3260                 ret = -ENOMEM;
3261                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3262                 goto out;
3263         }
3264
3265         list_add(&adapter->list, &adapter_list);
3266
3267         adapter->ofdev = dev;
3268
3269         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3270                                          NULL);
3271         if (adapter_handle)
3272                 adapter->handle = *adapter_handle;
3273
3274         if (!adapter->handle) {
3275                 dev_err(&dev->dev, "failed getting handle for adapter"
3276                         " '%s'\n", dev->dev.of_node->full_name);
3277                 ret = -ENODEV;
3278                 goto out_free_ad;
3279         }
3280
3281         adapter->pd = EHEA_PD_ID;
3282
3283         dev_set_drvdata(&dev->dev, adapter);
3284
3285
3286         /* initialize adapter and ports */
3287         /* get adapter properties */
3288         ret = ehea_sense_adapter_attr(adapter);
3289         if (ret) {
3290                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3291                 goto out_free_ad;
3292         }
3293
3294         adapter->neq = ehea_create_eq(adapter,
3295                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3296         if (!adapter->neq) {
3297                 ret = -EIO;
3298                 dev_err(&dev->dev, "NEQ creation failed\n");
3299                 goto out_free_ad;
3300         }
3301
3302         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3303                      (unsigned long)adapter);
3304
3305         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3306                                   ehea_interrupt_neq, IRQF_DISABLED,
3307                                   "ehea_neq", adapter);
3308         if (ret) {
3309                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3310                 goto out_kill_eq;
3311         }
3312
3313         ret = ehea_create_device_sysfs(dev);
3314         if (ret)
3315                 goto out_free_irq;
3316
3317         ret = ehea_setup_ports(adapter);
3318         if (ret) {
3319                 dev_err(&dev->dev, "setup_ports failed\n");
3320                 goto out_rem_dev_sysfs;
3321         }
3322
3323         ret = 0;
3324         goto out;
3325
3326 out_rem_dev_sysfs:
3327         ehea_remove_device_sysfs(dev);
3328
3329 out_free_irq:
3330         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3331
3332 out_kill_eq:
3333         ehea_destroy_eq(adapter->neq);
3334
3335 out_free_ad:
3336         list_del(&adapter->list);
3337         kfree(adapter);
3338
3339 out:
3340         ehea_update_firmware_handles();
3341
3342         return ret;
3343 }
3344
3345 static int __devexit ehea_remove(struct platform_device *dev)
3346 {
3347         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3348         int i;
3349
3350         for (i = 0; i < EHEA_MAX_PORTS; i++)
3351                 if (adapter->port[i]) {
3352                         ehea_shutdown_single_port(adapter->port[i]);
3353                         adapter->port[i] = NULL;
3354                 }
3355
3356         ehea_remove_device_sysfs(dev);
3357
3358         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3359         tasklet_kill(&adapter->neq_tasklet);
3360
3361         ehea_destroy_eq(adapter->neq);
3362         ehea_remove_adapter_mr(adapter);
3363         list_del(&adapter->list);
3364         kfree(adapter);
3365
3366         ehea_update_firmware_handles();
3367
3368         return 0;
3369 }
3370
3371 void ehea_crash_handler(void)
3372 {
3373         int i;
3374
3375         if (ehea_fw_handles.arr)
3376                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3377                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3378                                              ehea_fw_handles.arr[i].fwh,
3379                                              FORCE_FREE);
3380
3381         if (ehea_bcmc_regs.arr)
3382                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3383                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3384                                               ehea_bcmc_regs.arr[i].port_id,
3385                                               ehea_bcmc_regs.arr[i].reg_type,
3386                                               ehea_bcmc_regs.arr[i].macaddr,
3387                                               0, H_DEREG_BCMC);
3388 }
3389
3390 static int ehea_mem_notifier(struct notifier_block *nb,
3391                              unsigned long action, void *data)
3392 {
3393         int ret = NOTIFY_BAD;
3394         struct memory_notify *arg = data;
3395
3396         mutex_lock(&dlpar_mem_lock);
3397
3398         switch (action) {
3399         case MEM_CANCEL_OFFLINE:
3400                 pr_info("memory offlining canceled");
3401                 /* Readd canceled memory block */
3402         case MEM_ONLINE:
3403                 pr_info("memory is going online");
3404                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3405                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3406                         goto out_unlock;
3407                 ehea_rereg_mrs();
3408                 break;
3409         case MEM_GOING_OFFLINE:
3410                 pr_info("memory is going offline");
3411                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3412                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3413                         goto out_unlock;
3414                 ehea_rereg_mrs();
3415                 break;
3416         default:
3417                 break;
3418         }
3419
3420         ehea_update_firmware_handles();
3421         ret = NOTIFY_OK;
3422
3423 out_unlock:
3424         mutex_unlock(&dlpar_mem_lock);
3425         return ret;
3426 }
3427
3428 static struct notifier_block ehea_mem_nb = {
3429         .notifier_call = ehea_mem_notifier,
3430 };
3431
3432 static int ehea_reboot_notifier(struct notifier_block *nb,
3433                                 unsigned long action, void *unused)
3434 {
3435         if (action == SYS_RESTART) {
3436                 pr_info("Reboot: freeing all eHEA resources\n");
3437                 ibmebus_unregister_driver(&ehea_driver);
3438         }
3439         return NOTIFY_DONE;
3440 }
3441
3442 static struct notifier_block ehea_reboot_nb = {
3443         .notifier_call = ehea_reboot_notifier,
3444 };
3445
3446 static int check_module_parm(void)
3447 {
3448         int ret = 0;
3449
3450         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3451             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3452                 pr_info("Bad parameter: rq1_entries\n");
3453                 ret = -EINVAL;
3454         }
3455         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3456             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3457                 pr_info("Bad parameter: rq2_entries\n");
3458                 ret = -EINVAL;
3459         }
3460         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3461             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3462                 pr_info("Bad parameter: rq3_entries\n");
3463                 ret = -EINVAL;
3464         }
3465         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3466             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3467                 pr_info("Bad parameter: sq_entries\n");
3468                 ret = -EINVAL;
3469         }
3470
3471         return ret;
3472 }
3473
3474 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3475                                       char *buf)
3476 {
3477         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3478 }
3479
3480 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3481                    ehea_show_capabilities, NULL);
3482
3483 int __init ehea_module_init(void)
3484 {
3485         int ret;
3486
3487         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3488
3489         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3490         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3491
3492         mutex_init(&ehea_fw_handles.lock);
3493         spin_lock_init(&ehea_bcmc_regs.lock);
3494
3495         ret = check_module_parm();
3496         if (ret)
3497                 goto out;
3498
3499         ret = ehea_create_busmap();
3500         if (ret)
3501                 goto out;
3502
3503         ret = register_reboot_notifier(&ehea_reboot_nb);
3504         if (ret)
3505                 pr_info("failed registering reboot notifier\n");
3506
3507         ret = register_memory_notifier(&ehea_mem_nb);
3508         if (ret)
3509                 pr_info("failed registering memory remove notifier\n");
3510
3511         ret = crash_shutdown_register(ehea_crash_handler);
3512         if (ret)
3513                 pr_info("failed registering crash handler\n");
3514
3515         ret = ibmebus_register_driver(&ehea_driver);
3516         if (ret) {
3517                 pr_err("failed registering eHEA device driver on ebus\n");
3518                 goto out2;
3519         }
3520
3521         ret = driver_create_file(&ehea_driver.driver,
3522                                  &driver_attr_capabilities);
3523         if (ret) {
3524                 pr_err("failed to register capabilities attribute, ret=%d\n",
3525                        ret);
3526                 goto out3;
3527         }
3528
3529         return ret;
3530
3531 out3:
3532         ibmebus_unregister_driver(&ehea_driver);
3533 out2:
3534         unregister_memory_notifier(&ehea_mem_nb);
3535         unregister_reboot_notifier(&ehea_reboot_nb);
3536         crash_shutdown_unregister(ehea_crash_handler);
3537 out:
3538         return ret;
3539 }
3540
3541 static void __exit ehea_module_exit(void)
3542 {
3543         int ret;
3544
3545         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3546         ibmebus_unregister_driver(&ehea_driver);
3547         unregister_reboot_notifier(&ehea_reboot_nb);
3548         ret = crash_shutdown_unregister(ehea_crash_handler);
3549         if (ret)
3550                 pr_info("failed unregistering crash handler\n");
3551         unregister_memory_notifier(&ehea_mem_nb);
3552         kfree(ehea_fw_handles.arr);
3553         kfree(ehea_bcmc_regs.arr);
3554         ehea_destroy_busmap();
3555 }
3556
3557 module_init(ehea_module_init);
3558 module_exit(ehea_module_exit);