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,
 375                               round_jiffies_relative(msecs_to_jiffies(1000)));
 376 }
 377
 378 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 379 {
 380         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 381         struct net_device *dev = pr->port->netdev;
 382         int max_index_mask = pr->rq1_skba.len - 1;
 383         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 384         int adder = 0;
 385         int i;
 386
 387         pr->rq1_skba.os_skbs = 0;
 388
 389         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 390                 if (nr_of_wqes > 0)
 391                         pr->rq1_skba.index = index;
 392                 pr->rq1_skba.os_skbs = fill_wqes;
 393                 return;
 394         }
 395
 396         for (i = 0; i < fill_wqes; i++) {
 397                 if (!skb_arr_rq1[index]) {
 398                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 399                                                               EHEA_L_PKT_SIZE);
 400                         if (!skb_arr_rq1[index]) {
 401                                 netdev_info(dev, "Unable to allocate enough skb in the array\n");
 402                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 403                                 break;
 404                         }
 405                 }
 406                 index--;
 407                 index &= max_index_mask;
 408                 adder++;
 409         }
 410
 411         if (adder == 0)
 412                 return;
 413
 414         /* Ring doorbell */
 415         ehea_update_rq1a(pr->qp, adder);
 416 }
 417
 418 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 419 {
 420         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 421         struct net_device *dev = pr->port->netdev;
 422         int i;
 423
 424         if (nr_rq1a > pr->rq1_skba.len) {
 425                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 426                 return;
 427         }
 428
 429         for (i = 0; i < nr_rq1a; i++) {
 430                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 431                 if (!skb_arr_rq1[i]) {
 432                         netdev_info(dev, "Not enough memory to allocate skb array\n");
 433                         break;
 434                 }
 435         }
 436         /* Ring doorbell */
 437         ehea_update_rq1a(pr->qp, i - 1);
 438 }
 439
 440 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 441                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 442                               int num_wqes, int wqe_type, int packet_size)
 443 {
 444         struct net_device *dev = pr->port->netdev;
 445         struct ehea_qp *qp = pr->qp;
 446         struct sk_buff **skb_arr = q_skba->arr;
 447         struct ehea_rwqe *rwqe;
 448         int i, index, max_index_mask, fill_wqes;
 449         int adder = 0;
 450         int ret = 0;
 451
 452         fill_wqes = q_skba->os_skbs + num_wqes;
 453         q_skba->os_skbs = 0;
 454
 455         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 456                 q_skba->os_skbs = fill_wqes;
 457                 return ret;
 458         }
 459
 460         index = q_skba->index;
 461         max_index_mask = q_skba->len - 1;
 462         for (i = 0; i < fill_wqes; i++) {
 463                 u64 tmp_addr;
 464                 struct sk_buff *skb;
 465
 466                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 467                 if (!skb) {
 468                         q_skba->os_skbs = fill_wqes - i;
 469                         if (q_skba->os_skbs == q_skba->len - 2) {
 470                                 netdev_info(pr->port->netdev,
 471                                             "rq%i ran dry - no mem for skb\n",
 472                                             rq_nr);
 473                                 ret = -ENOMEM;
 474                         }
 475                         break;
 476                 }
 477
 478                 skb_arr[index] = skb;
 479                 tmp_addr = ehea_map_vaddr(skb->data);
 480                 if (tmp_addr == -1) {
 481                         dev_kfree_skb(skb);
 482                         q_skba->os_skbs = fill_wqes - i;
 483                         ret = 0;
 484                         break;
 485                 }
 486
 487                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 488                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 489                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 490                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 491                 rwqe->sg_list[0].vaddr = tmp_addr;
 492                 rwqe->sg_list[0].len = packet_size;
 493                 rwqe->data_segments = 1;
 494
 495                 index++;
 496                 index &= max_index_mask;
 497                 adder++;
 498         }
 499
 500         q_skba->index = index;
 501         if (adder == 0)
 502                 goto out;
 503
 504         /* Ring doorbell */
 505         iosync();
 506         if (rq_nr == 2)
 507                 ehea_update_rq2a(pr->qp, adder);
 508         else
 509                 ehea_update_rq3a(pr->qp, adder);
 510 out:
 511         return ret;
 512 }
 513
 514
 515 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 516 {
 517         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 518                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 519                                   EHEA_RQ2_PKT_SIZE);
 520 }
 521
 522
 523 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 524 {
 525         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 526                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 527                                   EHEA_MAX_PACKET_SIZE);
 528 }
 529
 530 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 531 {
 532         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 533         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 534                 return 0;
 535         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 536             (cqe->header_length == 0))
 537                 return 0;
 538         return -EINVAL;
 539 }
 540
 541 static inline void ehea_fill_skb(struct net_device *dev,
 542                                  struct sk_buff *skb, struct ehea_cqe *cqe,
 543                                  struct ehea_port_res *pr)
 544 {
 545         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 546
 547         skb_put(skb, length);
 548         skb->protocol = eth_type_trans(skb, dev);
 549
 550         /* The packet was not an IPV4 packet so a complemented checksum was
 551            calculated. The value is found in the Internet Checksum field. */
 552         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 553                 skb->ip_summed = CHECKSUM_COMPLETE;
 554                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 555         } else
 556                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 557
 558         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 559 }
 560
 561 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 562                                                int arr_len,
 563                                                struct ehea_cqe *cqe)
 564 {
 565         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 566         struct sk_buff *skb;
 567         void *pref;
 568         int x;
 569
 570         x = skb_index + 1;
 571         x &= (arr_len - 1);
 572
 573         pref = skb_array[x];
 574         if (pref) {
 575                 prefetchw(pref);
 576                 prefetchw(pref + EHEA_CACHE_LINE);
 577
 578                 pref = (skb_array[x]->data);
 579                 prefetch(pref);
 580                 prefetch(pref + EHEA_CACHE_LINE);
 581                 prefetch(pref + EHEA_CACHE_LINE * 2);
 582                 prefetch(pref + EHEA_CACHE_LINE * 3);
 583         }
 584
 585         skb = skb_array[skb_index];
 586         skb_array[skb_index] = NULL;
 587         return skb;
 588 }
 589
 590 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 591                                                   int arr_len, int wqe_index)
 592 {
 593         struct sk_buff *skb;
 594         void *pref;
 595         int x;
 596
 597         x = wqe_index + 1;
 598         x &= (arr_len - 1);
 599
 600         pref = skb_array[x];
 601         if (pref) {
 602                 prefetchw(pref);
 603                 prefetchw(pref + EHEA_CACHE_LINE);
 604
 605                 pref = (skb_array[x]->data);
 606                 prefetchw(pref);
 607                 prefetchw(pref + EHEA_CACHE_LINE);
 608         }
 609
 610         skb = skb_array[wqe_index];
 611         skb_array[wqe_index] = NULL;
 612         return skb;
 613 }
 614
 615 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 616                                  struct ehea_cqe *cqe, int *processed_rq2,
 617                                  int *processed_rq3)
 618 {
 619         struct sk_buff *skb;
 620
 621         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 622                 pr->p_stats.err_tcp_cksum++;
 623         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 624                 pr->p_stats.err_ip_cksum++;
 625         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 626                 pr->p_stats.err_frame_crc++;
 627
 628         if (rq == 2) {
 629                 *processed_rq2 += 1;
 630                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 631                 dev_kfree_skb(skb);
 632         } else if (rq == 3) {
 633                 *processed_rq3 += 1;
 634                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 635                 dev_kfree_skb(skb);
 636         }
 637
 638         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 639                 if (netif_msg_rx_err(pr->port)) {
 640                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 641                                pr->qp->init_attr.qp_nr);
 642                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 643                 }
 644                 ehea_schedule_port_reset(pr->port);
 645                 return 1;
 646         }
 647
 648         return 0;
 649 }
 650
 651 static int ehea_proc_rwqes(struct net_device *dev,
 652                            struct ehea_port_res *pr,
 653                            int budget)
 654 {
 655         struct ehea_port *port = pr->port;
 656         struct ehea_qp *qp = pr->qp;
 657         struct ehea_cqe *cqe;
 658         struct sk_buff *skb;
 659         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 660         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 661         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 662         int skb_arr_rq1_len = pr->rq1_skba.len;
 663         int skb_arr_rq2_len = pr->rq2_skba.len;
 664         int skb_arr_rq3_len = pr->rq3_skba.len;
 665         int processed, processed_rq1, processed_rq2, processed_rq3;
 666         u64 processed_bytes = 0;
 667         int wqe_index, last_wqe_index, rq, port_reset;
 668
 669         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 670         last_wqe_index = 0;
 671
 672         cqe = ehea_poll_rq1(qp, &wqe_index);
 673         while ((processed < budget) && cqe) {
 674                 ehea_inc_rq1(qp);
 675                 processed_rq1++;
 676                 processed++;
 677                 if (netif_msg_rx_status(port))
 678                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 679
 680                 last_wqe_index = wqe_index;
 681                 rmb();
 682                 if (!ehea_check_cqe(cqe, &rq)) {
 683                         if (rq == 1) {
 684                                 /* LL RQ1 */
 685                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 686                                                           skb_arr_rq1_len,
 687                                                           wqe_index);
 688                                 if (unlikely(!skb)) {
 689                                         netif_info(port, rx_err, dev,
 690                                                   "LL rq1: skb=NULL\n");
 691
 692                                         skb = netdev_alloc_skb(dev,
 693                                                                EHEA_L_PKT_SIZE);
 694                                         if (!skb) {
 695                                                 netdev_err(dev, "Not enough memory to allocate skb\n");
 696                                                 break;
 697                                         }
 698                                 }
 699                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 700                                                  cqe->num_bytes_transfered - 4);
 701                                 ehea_fill_skb(dev, skb, cqe, pr);
 702                         } else if (rq == 2) {
 703                                 /* RQ2 */
 704                                 skb = get_skb_by_index(skb_arr_rq2,
 705                                                        skb_arr_rq2_len, cqe);
 706                                 if (unlikely(!skb)) {
 707                                         netif_err(port, rx_err, dev,
 708                                                   "rq2: skb=NULL\n");
 709                                         break;
 710                                 }
 711                                 ehea_fill_skb(dev, skb, cqe, pr);
 712                                 processed_rq2++;
 713                         } else {
 714                                 /* RQ3 */
 715                                 skb = get_skb_by_index(skb_arr_rq3,
 716                                                        skb_arr_rq3_len, cqe);
 717                                 if (unlikely(!skb)) {
 718                                         netif_err(port, rx_err, dev,
 719                                                   "rq3: skb=NULL\n");
 720                                         break;
 721                                 }
 722                                 ehea_fill_skb(dev, skb, cqe, pr);
 723                                 processed_rq3++;
 724                         }
 725
 726                         processed_bytes += skb->len;
 727
 728                         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 729                                 __vlan_hwaccel_put_tag(skb, cqe->vlan_tag);
 730
 731                         napi_gro_receive(&pr->napi, skb);
 732                 } else {
 733                         pr->p_stats.poll_receive_errors++;
 734                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 735                                                            &processed_rq2,
 736                                                            &processed_rq3);
 737                         if (port_reset)
 738                                 break;
 739                 }
 740                 cqe = ehea_poll_rq1(qp, &wqe_index);
 741         }
 742
 743         pr->rx_packets += processed;
 744         pr->rx_bytes += processed_bytes;
 745
 746         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 747         ehea_refill_rq2(pr, processed_rq2);
 748         ehea_refill_rq3(pr, processed_rq3);
 749
 750         return processed;
 751 }
 752
 753 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 754
 755 static void reset_sq_restart_flag(struct ehea_port *port)
 756 {
 757         int i;
 758
 759         for (i = 0; i < port->num_def_qps; i++) {
 760                 struct ehea_port_res *pr = &port->port_res[i];
 761                 pr->sq_restart_flag = 0;
 762         }
 763         wake_up(&port->restart_wq);
 764 }
 765
 766 static void check_sqs(struct ehea_port *port)
 767 {
 768         struct ehea_swqe *swqe;
 769         int swqe_index;
 770         int i, k;
 771
 772         for (i = 0; i < port->num_def_qps; i++) {
 773                 struct ehea_port_res *pr = &port->port_res[i];
 774                 int ret;
 775                 k = 0;
 776                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 777                 memset(swqe, 0, SWQE_HEADER_SIZE);
 778                 atomic_dec(&pr->swqe_avail);
 779
 780                 swqe->tx_control |= EHEA_SWQE_PURGE;
 781                 swqe->wr_id = SWQE_RESTART_CHECK;
 782                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 783                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 784                 swqe->immediate_data_length = 80;
 785
 786                 ehea_post_swqe(pr->qp, swqe);
 787
 788                 ret = wait_event_timeout(port->restart_wq,
 789                                          pr->sq_restart_flag == 0,
 790                                          msecs_to_jiffies(100));
 791
 792                 if (!ret) {
 793                         pr_err("HW/SW queues out of sync\n");
 794                         ehea_schedule_port_reset(pr->port);
 795                         return;
 796                 }
 797         }
 798 }
 799
 800
 801 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 802 {
 803         struct sk_buff *skb;
 804         struct ehea_cq *send_cq = pr->send_cq;
 805         struct ehea_cqe *cqe;
 806         int quota = my_quota;
 807         int cqe_counter = 0;
 808         int swqe_av = 0;
 809         int index;
 810         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 811                                                 pr - &pr->port->port_res[0]);
 812
 813         cqe = ehea_poll_cq(send_cq);
 814         while (cqe && (quota > 0)) {
 815                 ehea_inc_cq(send_cq);
 816
 817                 cqe_counter++;
 818                 rmb();
 819
 820                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 821                         pr->sq_restart_flag = 1;
 822                         swqe_av++;
 823                         break;
 824                 }
 825
 826                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 827                         pr_err("Bad send completion status=0x%04X\n",
 828                                cqe->status);
 829
 830                         if (netif_msg_tx_err(pr->port))
 831                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 832
 833                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 834                                 pr_err("Resetting port\n");
 835                                 ehea_schedule_port_reset(pr->port);
 836                                 break;
 837                         }
 838                 }
 839
 840                 if (netif_msg_tx_done(pr->port))
 841                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 842
 843                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 844                            == EHEA_SWQE2_TYPE)) {
 845
 846                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 847                         skb = pr->sq_skba.arr[index];
 848                         dev_kfree_skb(skb);
 849                         pr->sq_skba.arr[index] = NULL;
 850                 }
 851
 852                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 853                 quota--;
 854
 855                 cqe = ehea_poll_cq(send_cq);
 856         }
 857
 858         ehea_update_feca(send_cq, cqe_counter);
 859         atomic_add(swqe_av, &pr->swqe_avail);
 860
 861         if (unlikely(netif_tx_queue_stopped(txq) &&
 862                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 863                 __netif_tx_lock(txq, smp_processor_id());
 864                 if (netif_tx_queue_stopped(txq) &&
 865                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 866                         netif_tx_wake_queue(txq);
 867                 __netif_tx_unlock(txq);
 868         }
 869
 870         wake_up(&pr->port->swqe_avail_wq);
 871
 872         return cqe;
 873 }
 874
 875 #define EHEA_POLL_MAX_CQES 65535
 876
 877 static int ehea_poll(struct napi_struct *napi, int budget)
 878 {
 879         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 880                                                 napi);
 881         struct net_device *dev = pr->port->netdev;
 882         struct ehea_cqe *cqe;
 883         struct ehea_cqe *cqe_skb = NULL;
 884         int wqe_index;
 885         int rx = 0;
 886
 887         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 888         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 889
 890         while (rx != budget) {
 891                 napi_complete(napi);
 892                 ehea_reset_cq_ep(pr->recv_cq);
 893                 ehea_reset_cq_ep(pr->send_cq);
 894                 ehea_reset_cq_n1(pr->recv_cq);
 895                 ehea_reset_cq_n1(pr->send_cq);
 896                 rmb();
 897                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 898                 cqe_skb = ehea_poll_cq(pr->send_cq);
 899
 900                 if (!cqe && !cqe_skb)
 901                         return rx;
 902
 903                 if (!napi_reschedule(napi))
 904                         return rx;
 905
 906                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 907                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 908         }
 909
 910         return rx;
 911 }
 912
 913 #ifdef CONFIG_NET_POLL_CONTROLLER
 914 static void ehea_netpoll(struct net_device *dev)
 915 {
 916         struct ehea_port *port = netdev_priv(dev);
 917         int i;
 918
 919         for (i = 0; i < port->num_def_qps; i++)
 920                 napi_schedule(&port->port_res[i].napi);
 921 }
 922 #endif
 923
 924 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 925 {
 926         struct ehea_port_res *pr = param;
 927
 928         napi_schedule(&pr->napi);
 929
 930         return IRQ_HANDLED;
 931 }
 932
 933 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 934 {
 935         struct ehea_port *port = param;
 936         struct ehea_eqe *eqe;
 937         struct ehea_qp *qp;
 938         u32 qp_token;
 939         u64 resource_type, aer, aerr;
 940         int reset_port = 0;
 941
 942         eqe = ehea_poll_eq(port->qp_eq);
 943
 944         while (eqe) {
 945                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 946                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 947                        eqe->entry, qp_token);
 948
 949                 qp = port->port_res[qp_token].qp;
 950
 951                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 952                                                 &aer, &aerr);
 953
 954                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 955                         if ((aer & EHEA_AER_RESET_MASK) ||
 956                             (aerr & EHEA_AERR_RESET_MASK))
 957                                  reset_port = 1;
 958                 } else
 959                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 960
 961                 eqe = ehea_poll_eq(port->qp_eq);
 962         }
 963
 964         if (reset_port) {
 965                 pr_err("Resetting port\n");
 966                 ehea_schedule_port_reset(port);
 967         }
 968
 969         return IRQ_HANDLED;
 970 }
 971
 972 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 973                                        int logical_port)
 974 {
 975         int i;
 976
 977         for (i = 0; i < EHEA_MAX_PORTS; i++)
 978                 if (adapter->port[i])
 979                         if (adapter->port[i]->logical_port_id == logical_port)
 980                                 return adapter->port[i];
 981         return NULL;
 982 }
 983
 984 int ehea_sense_port_attr(struct ehea_port *port)
 985 {
 986         int ret;
 987         u64 hret;
 988         struct hcp_ehea_port_cb0 *cb0;
 989
 990         /* may be called via ehea_neq_tasklet() */
 991         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 992         if (!cb0) {
 993                 pr_err("no mem for cb0\n");
 994                 ret = -ENOMEM;
 995                 goto out;
 996         }
 997
 998         hret = ehea_h_query_ehea_port(port->adapter->handle,
 999                                       port->logical_port_id, H_PORT_CB0,
1000                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1001                                       cb0);
1002         if (hret != H_SUCCESS) {
1003                 ret = -EIO;
1004                 goto out_free;
1005         }
1006
1007         /* MAC address */
1008         port->mac_addr = cb0->port_mac_addr << 16;
1009
1010         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1011                 ret = -EADDRNOTAVAIL;
1012                 goto out_free;
1013         }
1014
1015         /* Port speed */
1016         switch (cb0->port_speed) {
1017         case H_SPEED_10M_H:
1018                 port->port_speed = EHEA_SPEED_10M;
1019                 port->full_duplex = 0;
1020                 break;
1021         case H_SPEED_10M_F:
1022                 port->port_speed = EHEA_SPEED_10M;
1023                 port->full_duplex = 1;
1024                 break;
1025         case H_SPEED_100M_H:
1026                 port->port_speed = EHEA_SPEED_100M;
1027                 port->full_duplex = 0;
1028                 break;
1029         case H_SPEED_100M_F:
1030                 port->port_speed = EHEA_SPEED_100M;
1031                 port->full_duplex = 1;
1032                 break;
1033         case H_SPEED_1G_F:
1034                 port->port_speed = EHEA_SPEED_1G;
1035                 port->full_duplex = 1;
1036                 break;
1037         case H_SPEED_10G_F:
1038                 port->port_speed = EHEA_SPEED_10G;
1039                 port->full_duplex = 1;
1040                 break;
1041         default:
1042                 port->port_speed = 0;
1043                 port->full_duplex = 0;
1044                 break;
1045         }
1046
1047         port->autoneg = 1;
1048         port->num_mcs = cb0->num_default_qps;
1049
1050         /* Number of default QPs */
1051         if (use_mcs)
1052                 port->num_def_qps = cb0->num_default_qps;
1053         else
1054                 port->num_def_qps = 1;
1055
1056         if (!port->num_def_qps) {
1057                 ret = -EINVAL;
1058                 goto out_free;
1059         }
1060
1061         ret = 0;
1062 out_free:
1063         if (ret || netif_msg_probe(port))
1064                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1065         free_page((unsigned long)cb0);
1066 out:
1067         return ret;
1068 }
1069
1070 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1071 {
1072         struct hcp_ehea_port_cb4 *cb4;
1073         u64 hret;
1074         int ret = 0;
1075
1076         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1077         if (!cb4) {
1078                 pr_err("no mem for cb4\n");
1079                 ret = -ENOMEM;
1080                 goto out;
1081         }
1082
1083         cb4->port_speed = port_speed;
1084
1085         netif_carrier_off(port->netdev);
1086
1087         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1088                                        port->logical_port_id,
1089                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1090         if (hret == H_SUCCESS) {
1091                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1092
1093                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1094                                               port->logical_port_id,
1095                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1096                                               cb4);
1097                 if (hret == H_SUCCESS) {
1098                         switch (cb4->port_speed) {
1099                         case H_SPEED_10M_H:
1100                                 port->port_speed = EHEA_SPEED_10M;
1101                                 port->full_duplex = 0;
1102                                 break;
1103                         case H_SPEED_10M_F:
1104                                 port->port_speed = EHEA_SPEED_10M;
1105                                 port->full_duplex = 1;
1106                                 break;
1107                         case H_SPEED_100M_H:
1108                                 port->port_speed = EHEA_SPEED_100M;
1109                                 port->full_duplex = 0;
1110                                 break;
1111                         case H_SPEED_100M_F:
1112                                 port->port_speed = EHEA_SPEED_100M;
1113                                 port->full_duplex = 1;
1114                                 break;
1115                         case H_SPEED_1G_F:
1116                                 port->port_speed = EHEA_SPEED_1G;
1117                                 port->full_duplex = 1;
1118                                 break;
1119                         case H_SPEED_10G_F:
1120                                 port->port_speed = EHEA_SPEED_10G;
1121                                 port->full_duplex = 1;
1122                                 break;
1123                         default:
1124                                 port->port_speed = 0;
1125                                 port->full_duplex = 0;
1126                                 break;
1127                         }
1128                 } else {
1129                         pr_err("Failed sensing port speed\n");
1130                         ret = -EIO;
1131                 }
1132         } else {
1133                 if (hret == H_AUTHORITY) {
1134                         pr_info("Hypervisor denied setting port speed\n");
1135                         ret = -EPERM;
1136                 } else {
1137                         ret = -EIO;
1138                         pr_err("Failed setting port speed\n");
1139                 }
1140         }
1141         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1142                 netif_carrier_on(port->netdev);
1143
1144         free_page((unsigned long)cb4);
1145 out:
1146         return ret;
1147 }
1148
1149 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1150 {
1151         int ret;
1152         u8 ec;
1153         u8 portnum;
1154         struct ehea_port *port;
1155         struct net_device *dev;
1156
1157         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1158         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1159         port = ehea_get_port(adapter, portnum);
1160         if (!port) {
1161                 netdev_err(NULL, "unknown portnum %x\n", portnum);
1162                 return;
1163         }
1164         dev = port->netdev;
1165
1166         switch (ec) {
1167         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
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 = skb_frag_size(frag);
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 = skb_frag_size(frag);
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                 break;
2005
2006         case IPPROTO_TCP:
2007                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2008                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2009
2010                 swqe->tcp_offset = swqe->ip_end + 1 +
2011                                    offsetof(struct tcphdr, check);
2012                 break;
2013         }
2014 }
2015
2016 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2017                        struct ehea_swqe *swqe, u32 lkey)
2018 {
2019         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2020
2021         xmit_common(skb, swqe);
2022
2023         write_swqe2_data(skb, dev, swqe, lkey);
2024 }
2025
2026 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2027                        struct ehea_swqe *swqe)
2028 {
2029         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2030
2031         xmit_common(skb, swqe);
2032
2033         if (!skb->data_len)
2034                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2035         else
2036                 skb_copy_bits(skb, 0, imm_data, skb->len);
2037
2038         swqe->immediate_data_length = skb->len;
2039         dev_kfree_skb(skb);
2040 }
2041
2042 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2043 {
2044         struct ehea_port *port = netdev_priv(dev);
2045         struct ehea_swqe *swqe;
2046         u32 lkey;
2047         int swqe_index;
2048         struct ehea_port_res *pr;
2049         struct netdev_queue *txq;
2050
2051         pr = &port->port_res[skb_get_queue_mapping(skb)];
2052         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2053
2054         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2055         memset(swqe, 0, SWQE_HEADER_SIZE);
2056         atomic_dec(&pr->swqe_avail);
2057
2058         if (vlan_tx_tag_present(skb)) {
2059                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2060                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2061         }
2062
2063         pr->tx_packets++;
2064         pr->tx_bytes += skb->len;
2065
2066         if (skb->len <= SWQE3_MAX_IMM) {
2067                 u32 sig_iv = port->sig_comp_iv;
2068                 u32 swqe_num = pr->swqe_id_counter;
2069                 ehea_xmit3(skb, dev, swqe);
2070                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2071                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2072                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2073                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2074                                                       sig_iv);
2075                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2076                         pr->swqe_ll_count = 0;
2077                 } else
2078                         pr->swqe_ll_count += 1;
2079         } else {
2080                 swqe->wr_id =
2081                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2082                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2083                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2084                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2085                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2086
2087                 pr->sq_skba.index++;
2088                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2089
2090                 lkey = pr->send_mr.lkey;
2091                 ehea_xmit2(skb, dev, swqe, lkey);
2092                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2093         }
2094         pr->swqe_id_counter += 1;
2095
2096         netif_info(port, tx_queued, dev,
2097                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2098         if (netif_msg_tx_queued(port))
2099                 ehea_dump(swqe, 512, "swqe");
2100
2101         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2102                 netif_tx_stop_queue(txq);
2103                 swqe->tx_control |= EHEA_SWQE_PURGE;
2104         }
2105
2106         ehea_post_swqe(pr->qp, swqe);
2107
2108         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2109                 pr->p_stats.queue_stopped++;
2110                 netif_tx_stop_queue(txq);
2111         }
2112
2113         return NETDEV_TX_OK;
2114 }
2115
2116 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2117 {
2118         struct ehea_port *port = netdev_priv(dev);
2119         struct ehea_adapter *adapter = port->adapter;
2120         struct hcp_ehea_port_cb1 *cb1;
2121         int index;
2122         u64 hret;
2123
2124         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2125         if (!cb1) {
2126                 pr_err("no mem for cb1\n");
2127                 goto out;
2128         }
2129
2130         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2131                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2132         if (hret != H_SUCCESS) {
2133                 pr_err("query_ehea_port failed\n");
2134                 goto out;
2135         }
2136
2137         index = (vid / 64);
2138         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2139
2140         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2141                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2142         if (hret != H_SUCCESS)
2143                 pr_err("modify_ehea_port failed\n");
2144 out:
2145         free_page((unsigned long)cb1);
2146         return;
2147 }
2148
2149 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2150 {
2151         struct ehea_port *port = netdev_priv(dev);
2152         struct ehea_adapter *adapter = port->adapter;
2153         struct hcp_ehea_port_cb1 *cb1;
2154         int index;
2155         u64 hret;
2156
2157         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2158         if (!cb1) {
2159                 pr_err("no mem for cb1\n");
2160                 goto out;
2161         }
2162
2163         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2164                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2165         if (hret != H_SUCCESS) {
2166                 pr_err("query_ehea_port failed\n");
2167                 goto out;
2168         }
2169
2170         index = (vid / 64);
2171         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2172
2173         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2174                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2175         if (hret != H_SUCCESS)
2176                 pr_err("modify_ehea_port failed\n");
2177 out:
2178         free_page((unsigned long)cb1);
2179 }
2180
2181 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2182 {
2183         int ret = -EIO;
2184         u64 hret;
2185         u16 dummy16 = 0;
2186         u64 dummy64 = 0;
2187         struct hcp_modify_qp_cb0 *cb0;
2188
2189         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2190         if (!cb0) {
2191                 ret = -ENOMEM;
2192                 goto out;
2193         }
2194
2195         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2196                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2197         if (hret != H_SUCCESS) {
2198                 pr_err("query_ehea_qp failed (1)\n");
2199                 goto out;
2200         }
2201
2202         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2203         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2204                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2205                                      &dummy64, &dummy64, &dummy16, &dummy16);
2206         if (hret != H_SUCCESS) {
2207                 pr_err("modify_ehea_qp failed (1)\n");
2208                 goto out;
2209         }
2210
2211         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2212                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2213         if (hret != H_SUCCESS) {
2214                 pr_err("query_ehea_qp failed (2)\n");
2215                 goto out;
2216         }
2217
2218         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2219         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2220                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2221                                      &dummy64, &dummy64, &dummy16, &dummy16);
2222         if (hret != H_SUCCESS) {
2223                 pr_err("modify_ehea_qp failed (2)\n");
2224                 goto out;
2225         }
2226
2227         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2228                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2229         if (hret != H_SUCCESS) {
2230                 pr_err("query_ehea_qp failed (3)\n");
2231                 goto out;
2232         }
2233
2234         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2235         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2236                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2237                                      &dummy64, &dummy64, &dummy16, &dummy16);
2238         if (hret != H_SUCCESS) {
2239                 pr_err("modify_ehea_qp failed (3)\n");
2240                 goto out;
2241         }
2242
2243         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2244                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2245         if (hret != H_SUCCESS) {
2246                 pr_err("query_ehea_qp failed (4)\n");
2247                 goto out;
2248         }
2249
2250         ret = 0;
2251 out:
2252         free_page((unsigned long)cb0);
2253         return ret;
2254 }
2255
2256 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2257 {
2258         int ret, i;
2259         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2260         enum ehea_eq_type eq_type = EHEA_EQ;
2261
2262         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2263                                    EHEA_MAX_ENTRIES_EQ, 1);
2264         if (!port->qp_eq) {
2265                 ret = -EINVAL;
2266                 pr_err("ehea_create_eq failed (qp_eq)\n");
2267                 goto out_kill_eq;
2268         }
2269
2270         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2271         pr_cfg.max_entries_scq = sq_entries * 2;
2272         pr_cfg.max_entries_sq = sq_entries;
2273         pr_cfg.max_entries_rq1 = rq1_entries;
2274         pr_cfg.max_entries_rq2 = rq2_entries;
2275         pr_cfg.max_entries_rq3 = rq3_entries;
2276
2277         pr_cfg_small_rx.max_entries_rcq = 1;
2278         pr_cfg_small_rx.max_entries_scq = sq_entries;
2279         pr_cfg_small_rx.max_entries_sq = sq_entries;
2280         pr_cfg_small_rx.max_entries_rq1 = 1;
2281         pr_cfg_small_rx.max_entries_rq2 = 1;
2282         pr_cfg_small_rx.max_entries_rq3 = 1;
2283
2284         for (i = 0; i < def_qps; i++) {
2285                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2286                 if (ret)
2287                         goto out_clean_pr;
2288         }
2289         for (i = def_qps; i < def_qps; i++) {
2290                 ret = ehea_init_port_res(port, &port->port_res[i],
2291                                          &pr_cfg_small_rx, i);
2292                 if (ret)
2293                         goto out_clean_pr;
2294         }
2295
2296         return 0;
2297
2298 out_clean_pr:
2299         while (--i >= 0)
2300                 ehea_clean_portres(port, &port->port_res[i]);
2301
2302 out_kill_eq:
2303         ehea_destroy_eq(port->qp_eq);
2304         return ret;
2305 }
2306
2307 static int ehea_clean_all_portres(struct ehea_port *port)
2308 {
2309         int ret = 0;
2310         int i;
2311
2312         for (i = 0; i < port->num_def_qps; i++)
2313                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2314
2315         ret |= ehea_destroy_eq(port->qp_eq);
2316
2317         return ret;
2318 }
2319
2320 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2321 {
2322         if (adapter->active_ports)
2323                 return;
2324
2325         ehea_rem_mr(&adapter->mr);
2326 }
2327
2328 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2329 {
2330         if (adapter->active_ports)
2331                 return 0;
2332
2333         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2334 }
2335
2336 static int ehea_up(struct net_device *dev)
2337 {
2338         int ret, i;
2339         struct ehea_port *port = netdev_priv(dev);
2340
2341         if (port->state == EHEA_PORT_UP)
2342                 return 0;
2343
2344         ret = ehea_port_res_setup(port, port->num_def_qps);
2345         if (ret) {
2346                 netdev_err(dev, "port_res_failed\n");
2347                 goto out;
2348         }
2349
2350         /* Set default QP for this port */
2351         ret = ehea_configure_port(port);
2352         if (ret) {
2353                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2354                 goto out_clean_pr;
2355         }
2356
2357         ret = ehea_reg_interrupts(dev);
2358         if (ret) {
2359                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2360                 goto out_clean_pr;
2361         }
2362
2363         for (i = 0; i < port->num_def_qps; i++) {
2364                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2365                 if (ret) {
2366                         netdev_err(dev, "activate_qp failed\n");
2367                         goto out_free_irqs;
2368                 }
2369         }
2370
2371         for (i = 0; i < port->num_def_qps; i++) {
2372                 ret = ehea_fill_port_res(&port->port_res[i]);
2373                 if (ret) {
2374                         netdev_err(dev, "out_free_irqs\n");
2375                         goto out_free_irqs;
2376                 }
2377         }
2378
2379         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2380         if (ret) {
2381                 ret = -EIO;
2382                 goto out_free_irqs;
2383         }
2384
2385         port->state = EHEA_PORT_UP;
2386
2387         ret = 0;
2388         goto out;
2389
2390 out_free_irqs:
2391         ehea_free_interrupts(dev);
2392
2393 out_clean_pr:
2394         ehea_clean_all_portres(port);
2395 out:
2396         if (ret)
2397                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2398
2399         ehea_update_bcmc_registrations();
2400         ehea_update_firmware_handles();
2401
2402         return ret;
2403 }
2404
2405 static void port_napi_disable(struct ehea_port *port)
2406 {
2407         int i;
2408
2409         for (i = 0; i < port->num_def_qps; i++)
2410                 napi_disable(&port->port_res[i].napi);
2411 }
2412
2413 static void port_napi_enable(struct ehea_port *port)
2414 {
2415         int i;
2416
2417         for (i = 0; i < port->num_def_qps; i++)
2418                 napi_enable(&port->port_res[i].napi);
2419 }
2420
2421 static int ehea_open(struct net_device *dev)
2422 {
2423         int ret;
2424         struct ehea_port *port = netdev_priv(dev);
2425
2426         mutex_lock(&port->port_lock);
2427
2428         netif_info(port, ifup, dev, "enabling port\n");
2429
2430         ret = ehea_up(dev);
2431         if (!ret) {
2432                 port_napi_enable(port);
2433                 netif_tx_start_all_queues(dev);
2434         }
2435
2436         mutex_unlock(&port->port_lock);
2437         schedule_delayed_work(&port->stats_work,
2438                               round_jiffies_relative(msecs_to_jiffies(1000)));
2439
2440         return ret;
2441 }
2442
2443 static int ehea_down(struct net_device *dev)
2444 {
2445         int ret;
2446         struct ehea_port *port = netdev_priv(dev);
2447
2448         if (port->state == EHEA_PORT_DOWN)
2449                 return 0;
2450
2451         ehea_drop_multicast_list(dev);
2452         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2453
2454         ehea_free_interrupts(dev);
2455
2456         port->state = EHEA_PORT_DOWN;
2457
2458         ehea_update_bcmc_registrations();
2459
2460         ret = ehea_clean_all_portres(port);
2461         if (ret)
2462                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2463
2464         ehea_update_firmware_handles();
2465
2466         return ret;
2467 }
2468
2469 static int ehea_stop(struct net_device *dev)
2470 {
2471         int ret;
2472         struct ehea_port *port = netdev_priv(dev);
2473
2474         netif_info(port, ifdown, dev, "disabling port\n");
2475
2476         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2477         cancel_work_sync(&port->reset_task);
2478         cancel_delayed_work_sync(&port->stats_work);
2479         mutex_lock(&port->port_lock);
2480         netif_tx_stop_all_queues(dev);
2481         port_napi_disable(port);
2482         ret = ehea_down(dev);
2483         mutex_unlock(&port->port_lock);
2484         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2485         return ret;
2486 }
2487
2488 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2489 {
2490         struct ehea_qp qp = *orig_qp;
2491         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2492         struct ehea_swqe *swqe;
2493         int wqe_index;
2494         int i;
2495
2496         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2497                 swqe = ehea_get_swqe(&qp, &wqe_index);
2498                 swqe->tx_control |= EHEA_SWQE_PURGE;
2499         }
2500 }
2501
2502 static void ehea_flush_sq(struct ehea_port *port)
2503 {
2504         int i;
2505
2506         for (i = 0; i < port->num_def_qps; i++) {
2507                 struct ehea_port_res *pr = &port->port_res[i];
2508                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2509                 int ret;
2510
2511                 ret = wait_event_timeout(port->swqe_avail_wq,
2512                          atomic_read(&pr->swqe_avail) >= swqe_max,
2513                          msecs_to_jiffies(100));
2514
2515                 if (!ret) {
2516                         pr_err("WARNING: sq not flushed completely\n");
2517                         break;
2518                 }
2519         }
2520 }
2521
2522 int ehea_stop_qps(struct net_device *dev)
2523 {
2524         struct ehea_port *port = netdev_priv(dev);
2525         struct ehea_adapter *adapter = port->adapter;
2526         struct hcp_modify_qp_cb0 *cb0;
2527         int ret = -EIO;
2528         int dret;
2529         int i;
2530         u64 hret;
2531         u64 dummy64 = 0;
2532         u16 dummy16 = 0;
2533
2534         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2535         if (!cb0) {
2536                 ret = -ENOMEM;
2537                 goto out;
2538         }
2539
2540         for (i = 0; i < (port->num_def_qps); i++) {
2541                 struct ehea_port_res *pr =  &port->port_res[i];
2542                 struct ehea_qp *qp = pr->qp;
2543
2544                 /* Purge send queue */
2545                 ehea_purge_sq(qp);
2546
2547                 /* Disable queue pair */
2548                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2549                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2550                                             cb0);
2551                 if (hret != H_SUCCESS) {
2552                         pr_err("query_ehea_qp failed (1)\n");
2553                         goto out;
2554                 }
2555
2556                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2557                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2558
2559                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2560                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2561                                                             1), cb0, &dummy64,
2562                                              &dummy64, &dummy16, &dummy16);
2563                 if (hret != H_SUCCESS) {
2564                         pr_err("modify_ehea_qp failed (1)\n");
2565                         goto out;
2566                 }
2567
2568                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2569                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2570                                             cb0);
2571                 if (hret != H_SUCCESS) {
2572                         pr_err("query_ehea_qp failed (2)\n");
2573                         goto out;
2574                 }
2575
2576                 /* deregister shared memory regions */
2577                 dret = ehea_rem_smrs(pr);
2578                 if (dret) {
2579                         pr_err("unreg shared memory region failed\n");
2580                         goto out;
2581                 }
2582         }
2583
2584         ret = 0;
2585 out:
2586         free_page((unsigned long)cb0);
2587
2588         return ret;
2589 }
2590
2591 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2592 {
2593         struct ehea_qp qp = *orig_qp;
2594         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2595         struct ehea_rwqe *rwqe;
2596         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2597         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2598         struct sk_buff *skb;
2599         u32 lkey = pr->recv_mr.lkey;
2600
2601
2602         int i;
2603         int index;
2604
2605         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2606                 rwqe = ehea_get_next_rwqe(&qp, 2);
2607                 rwqe->sg_list[0].l_key = lkey;
2608                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2609                 skb = skba_rq2[index];
2610                 if (skb)
2611                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2612         }
2613
2614         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2615                 rwqe = ehea_get_next_rwqe(&qp, 3);
2616                 rwqe->sg_list[0].l_key = lkey;
2617                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2618                 skb = skba_rq3[index];
2619                 if (skb)
2620                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2621         }
2622 }
2623
2624 int ehea_restart_qps(struct net_device *dev)
2625 {
2626         struct ehea_port *port = netdev_priv(dev);
2627         struct ehea_adapter *adapter = port->adapter;
2628         int ret = 0;
2629         int i;
2630
2631         struct hcp_modify_qp_cb0 *cb0;
2632         u64 hret;
2633         u64 dummy64 = 0;
2634         u16 dummy16 = 0;
2635
2636         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2637         if (!cb0) {
2638                 ret = -ENOMEM;
2639                 goto out;
2640         }
2641
2642         for (i = 0; i < (port->num_def_qps); i++) {
2643                 struct ehea_port_res *pr =  &port->port_res[i];
2644                 struct ehea_qp *qp = pr->qp;
2645
2646                 ret = ehea_gen_smrs(pr);
2647                 if (ret) {
2648                         netdev_err(dev, "creation of shared memory regions failed\n");
2649                         goto out;
2650                 }
2651
2652                 ehea_update_rqs(qp, pr);
2653
2654                 /* Enable queue pair */
2655                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2656                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2657                                             cb0);
2658                 if (hret != H_SUCCESS) {
2659                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2660                         goto out;
2661                 }
2662
2663                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2664                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2665
2666                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2667                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2668                                                             1), cb0, &dummy64,
2669                                              &dummy64, &dummy16, &dummy16);
2670                 if (hret != H_SUCCESS) {
2671                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2672                         goto out;
2673                 }
2674
2675                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2676                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2677                                             cb0);
2678                 if (hret != H_SUCCESS) {
2679                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2680                         goto out;
2681                 }
2682
2683                 /* refill entire queue */
2684                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2685                 ehea_refill_rq2(pr, 0);
2686                 ehea_refill_rq3(pr, 0);
2687         }
2688 out:
2689         free_page((unsigned long)cb0);
2690
2691         return ret;
2692 }
2693
2694 static void ehea_reset_port(struct work_struct *work)
2695 {
2696         int ret;
2697         struct ehea_port *port =
2698                 container_of(work, struct ehea_port, reset_task);
2699         struct net_device *dev = port->netdev;
2700
2701         mutex_lock(&dlpar_mem_lock);
2702         port->resets++;
2703         mutex_lock(&port->port_lock);
2704         netif_tx_disable(dev);
2705
2706         port_napi_disable(port);
2707
2708         ehea_down(dev);
2709
2710         ret = ehea_up(dev);
2711         if (ret)
2712                 goto out;
2713
2714         ehea_set_multicast_list(dev);
2715
2716         netif_info(port, timer, dev, "reset successful\n");
2717
2718         port_napi_enable(port);
2719
2720         netif_tx_wake_all_queues(dev);
2721 out:
2722         mutex_unlock(&port->port_lock);
2723         mutex_unlock(&dlpar_mem_lock);
2724 }
2725
2726 static void ehea_rereg_mrs(void)
2727 {
2728         int ret, i;
2729         struct ehea_adapter *adapter;
2730
2731         pr_info("LPAR memory changed - re-initializing driver\n");
2732
2733         list_for_each_entry(adapter, &adapter_list, list)
2734                 if (adapter->active_ports) {
2735                         /* Shutdown all ports */
2736                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2737                                 struct ehea_port *port = adapter->port[i];
2738                                 struct net_device *dev;
2739
2740                                 if (!port)
2741                                         continue;
2742
2743                                 dev = port->netdev;
2744
2745                                 if (dev->flags & IFF_UP) {
2746                                         mutex_lock(&port->port_lock);
2747                                         netif_tx_disable(dev);
2748                                         ehea_flush_sq(port);
2749                                         ret = ehea_stop_qps(dev);
2750                                         if (ret) {
2751                                                 mutex_unlock(&port->port_lock);
2752                                                 goto out;
2753                                         }
2754                                         port_napi_disable(port);
2755                                         mutex_unlock(&port->port_lock);
2756                                 }
2757                                 reset_sq_restart_flag(port);
2758                         }
2759
2760                         /* Unregister old memory region */
2761                         ret = ehea_rem_mr(&adapter->mr);
2762                         if (ret) {
2763                                 pr_err("unregister MR failed - driver inoperable!\n");
2764                                 goto out;
2765                         }
2766                 }
2767
2768         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2769
2770         list_for_each_entry(adapter, &adapter_list, list)
2771                 if (adapter->active_ports) {
2772                         /* Register new memory region */
2773                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2774                         if (ret) {
2775                                 pr_err("register MR failed - driver inoperable!\n");
2776                                 goto out;
2777                         }
2778
2779                         /* Restart all ports */
2780                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2781                                 struct ehea_port *port = adapter->port[i];
2782
2783                                 if (port) {
2784                                         struct net_device *dev = port->netdev;
2785
2786                                         if (dev->flags & IFF_UP) {
2787                                                 mutex_lock(&port->port_lock);
2788                                                 ret = ehea_restart_qps(dev);
2789                                                 if (!ret) {
2790                                                         check_sqs(port);
2791                                                         port_napi_enable(port);
2792                                                         netif_tx_wake_all_queues(dev);
2793                                                 } else {
2794                                                         netdev_err(dev, "Unable to restart QPS\n");
2795                                                 }
2796                                                 mutex_unlock(&port->port_lock);
2797                                         }
2798                                 }
2799                         }
2800                 }
2801         pr_info("re-initializing driver complete\n");
2802 out:
2803         return;
2804 }
2805
2806 static void ehea_tx_watchdog(struct net_device *dev)
2807 {
2808         struct ehea_port *port = netdev_priv(dev);
2809
2810         if (netif_carrier_ok(dev) &&
2811             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2812                 ehea_schedule_port_reset(port);
2813 }
2814
2815 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2816 {
2817         struct hcp_query_ehea *cb;
2818         u64 hret;
2819         int ret;
2820
2821         cb = (void *)get_zeroed_page(GFP_KERNEL);
2822         if (!cb) {
2823                 ret = -ENOMEM;
2824                 goto out;
2825         }
2826
2827         hret = ehea_h_query_ehea(adapter->handle, cb);
2828
2829         if (hret != H_SUCCESS) {
2830                 ret = -EIO;
2831                 goto out_herr;
2832         }
2833
2834         adapter->max_mc_mac = cb->max_mc_mac - 1;
2835         ret = 0;
2836
2837 out_herr:
2838         free_page((unsigned long)cb);
2839 out:
2840         return ret;
2841 }
2842
2843 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2844 {
2845         struct hcp_ehea_port_cb4 *cb4;
2846         u64 hret;
2847         int ret = 0;
2848
2849         *jumbo = 0;
2850
2851         /* (Try to) enable *jumbo frames */
2852         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2853         if (!cb4) {
2854                 pr_err("no mem for cb4\n");
2855                 ret = -ENOMEM;
2856                 goto out;
2857         } else {
2858                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2859                                               port->logical_port_id,
2860                                               H_PORT_CB4,
2861                                               H_PORT_CB4_JUMBO, cb4);
2862                 if (hret == H_SUCCESS) {
2863                         if (cb4->jumbo_frame)
2864                                 *jumbo = 1;
2865                         else {
2866                                 cb4->jumbo_frame = 1;
2867                                 hret = ehea_h_modify_ehea_port(port->adapter->
2868                                                                handle,
2869                                                                port->
2870                                                                logical_port_id,
2871                                                                H_PORT_CB4,
2872                                                                H_PORT_CB4_JUMBO,
2873                                                                cb4);
2874                                 if (hret == H_SUCCESS)
2875                                         *jumbo = 1;
2876                         }
2877                 } else
2878                         ret = -EINVAL;
2879
2880                 free_page((unsigned long)cb4);
2881         }
2882 out:
2883         return ret;
2884 }
2885
2886 static ssize_t ehea_show_port_id(struct device *dev,
2887                                  struct device_attribute *attr, char *buf)
2888 {
2889         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2890         return sprintf(buf, "%d", port->logical_port_id);
2891 }
2892
2893 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2894                    NULL);
2895
2896 static void __devinit logical_port_release(struct device *dev)
2897 {
2898         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2899         of_node_put(port->ofdev.dev.of_node);
2900 }
2901
2902 static struct device *ehea_register_port(struct ehea_port *port,
2903                                          struct device_node *dn)
2904 {
2905         int ret;
2906
2907         port->ofdev.dev.of_node = of_node_get(dn);
2908         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2909         port->ofdev.dev.bus = &ibmebus_bus_type;
2910
2911         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2912         port->ofdev.dev.release = logical_port_release;
2913
2914         ret = of_device_register(&port->ofdev);
2915         if (ret) {
2916                 pr_err("failed to register device. ret=%d\n", ret);
2917                 goto out;
2918         }
2919
2920         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2921         if (ret) {
2922                 pr_err("failed to register attributes, ret=%d\n", ret);
2923                 goto out_unreg_of_dev;
2924         }
2925
2926         return &port->ofdev.dev;
2927
2928 out_unreg_of_dev:
2929         of_device_unregister(&port->ofdev);
2930 out:
2931         return NULL;
2932 }
2933
2934 static void ehea_unregister_port(struct ehea_port *port)
2935 {
2936         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2937         of_device_unregister(&port->ofdev);
2938 }
2939
2940 static const struct net_device_ops ehea_netdev_ops = {
2941         .ndo_open               = ehea_open,
2942         .ndo_stop               = ehea_stop,
2943         .ndo_start_xmit         = ehea_start_xmit,
2944 #ifdef CONFIG_NET_POLL_CONTROLLER
2945         .ndo_poll_controller    = ehea_netpoll,
2946 #endif
2947         .ndo_get_stats64        = ehea_get_stats64,
2948         .ndo_set_mac_address    = ehea_set_mac_addr,
2949         .ndo_validate_addr      = eth_validate_addr,
2950         .ndo_set_rx_mode        = ehea_set_multicast_list,
2951         .ndo_change_mtu         = ehea_change_mtu,
2952         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2953         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2954         .ndo_tx_timeout         = ehea_tx_watchdog,
2955 };
2956
2957 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2958                                          u32 logical_port_id,
2959                                          struct device_node *dn)
2960 {
2961         int ret;
2962         struct net_device *dev;
2963         struct ehea_port *port;
2964         struct device *port_dev;
2965         int jumbo;
2966
2967         /* allocate memory for the port structures */
2968         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2969
2970         if (!dev) {
2971                 pr_err("no mem for net_device\n");
2972                 ret = -ENOMEM;
2973                 goto out_err;
2974         }
2975
2976         port = netdev_priv(dev);
2977
2978         mutex_init(&port->port_lock);
2979         port->state = EHEA_PORT_DOWN;
2980         port->sig_comp_iv = sq_entries / 10;
2981
2982         port->adapter = adapter;
2983         port->netdev = dev;
2984         port->logical_port_id = logical_port_id;
2985
2986         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2987
2988         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2989         if (!port->mc_list) {
2990                 ret = -ENOMEM;
2991                 goto out_free_ethdev;
2992         }
2993
2994         INIT_LIST_HEAD(&port->mc_list->list);
2995
2996         ret = ehea_sense_port_attr(port);
2997         if (ret)
2998                 goto out_free_mc_list;
2999
3000         netif_set_real_num_rx_queues(dev, port->num_def_qps);
3001         netif_set_real_num_tx_queues(dev, port->num_def_qps);
3002
3003         port_dev = ehea_register_port(port, dn);
3004         if (!port_dev)
3005                 goto out_free_mc_list;
3006
3007         SET_NETDEV_DEV(dev, port_dev);
3008
3009         /* initialize net_device structure */
3010         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3011
3012         dev->netdev_ops = &ehea_netdev_ops;
3013         ehea_set_ethtool_ops(dev);
3014
3015         dev->hw_features = NETIF_F_SG | NETIF_F_TSO
3016                       | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3017         dev->features = NETIF_F_SG | NETIF_F_TSO
3018                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3019                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3020                       | NETIF_F_RXCSUM;
3021         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3022                         NETIF_F_IP_CSUM;
3023         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3024
3025         INIT_WORK(&port->reset_task, ehea_reset_port);
3026         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3027
3028         init_waitqueue_head(&port->swqe_avail_wq);
3029         init_waitqueue_head(&port->restart_wq);
3030
3031         memset(&port->stats, 0, sizeof(struct net_device_stats));
3032         ret = register_netdev(dev);
3033         if (ret) {
3034                 pr_err("register_netdev failed. ret=%d\n", ret);
3035                 goto out_unreg_port;
3036         }
3037
3038         ret = ehea_get_jumboframe_status(port, &jumbo);
3039         if (ret)
3040                 netdev_err(dev, "failed determining jumbo frame status\n");
3041
3042         netdev_info(dev, "Jumbo frames are %sabled\n",
3043                     jumbo == 1 ? "en" : "dis");
3044
3045         adapter->active_ports++;
3046
3047         return port;
3048
3049 out_unreg_port:
3050         ehea_unregister_port(port);
3051
3052 out_free_mc_list:
3053         kfree(port->mc_list);
3054
3055 out_free_ethdev:
3056         free_netdev(dev);
3057
3058 out_err:
3059         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3060                logical_port_id, ret);
3061         return NULL;
3062 }
3063
3064 static void ehea_shutdown_single_port(struct ehea_port *port)
3065 {
3066         struct ehea_adapter *adapter = port->adapter;
3067
3068         cancel_work_sync(&port->reset_task);
3069         cancel_delayed_work_sync(&port->stats_work);
3070         unregister_netdev(port->netdev);
3071         ehea_unregister_port(port);
3072         kfree(port->mc_list);
3073         free_netdev(port->netdev);
3074         adapter->active_ports--;
3075 }
3076
3077 static int ehea_setup_ports(struct ehea_adapter *adapter)
3078 {
3079         struct device_node *lhea_dn;
3080         struct device_node *eth_dn = NULL;
3081
3082         const u32 *dn_log_port_id;
3083         int i = 0;
3084
3085         lhea_dn = adapter->ofdev->dev.of_node;
3086         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3087
3088                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3089                                                  NULL);
3090                 if (!dn_log_port_id) {
3091                         pr_err("bad device node: eth_dn name=%s\n",
3092                                eth_dn->full_name);
3093                         continue;
3094                 }
3095
3096                 if (ehea_add_adapter_mr(adapter)) {
3097                         pr_err("creating MR failed\n");
3098                         of_node_put(eth_dn);
3099                         return -EIO;
3100                 }
3101
3102                 adapter->port[i] = ehea_setup_single_port(adapter,
3103                                                           *dn_log_port_id,
3104                                                           eth_dn);
3105                 if (adapter->port[i])
3106                         netdev_info(adapter->port[i]->netdev,
3107                                     "logical port id #%d\n", *dn_log_port_id);
3108                 else
3109                         ehea_remove_adapter_mr(adapter);
3110
3111                 i++;
3112         }
3113         return 0;
3114 }
3115
3116 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3117                                            u32 logical_port_id)
3118 {
3119         struct device_node *lhea_dn;
3120         struct device_node *eth_dn = NULL;
3121         const u32 *dn_log_port_id;
3122
3123         lhea_dn = adapter->ofdev->dev.of_node;
3124         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3125
3126                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3127                                                  NULL);
3128                 if (dn_log_port_id)
3129                         if (*dn_log_port_id == logical_port_id)
3130                                 return eth_dn;
3131         }
3132
3133         return NULL;
3134 }
3135
3136 static ssize_t ehea_probe_port(struct device *dev,
3137                                struct device_attribute *attr,
3138                                const char *buf, size_t count)
3139 {
3140         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3141         struct ehea_port *port;
3142         struct device_node *eth_dn = NULL;
3143         int i;
3144
3145         u32 logical_port_id;
3146
3147         sscanf(buf, "%d", &logical_port_id);
3148
3149         port = ehea_get_port(adapter, logical_port_id);
3150
3151         if (port) {
3152                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3153                             logical_port_id);
3154                 return -EINVAL;
3155         }
3156
3157         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3158
3159         if (!eth_dn) {
3160                 pr_info("no logical port with id %d found\n", logical_port_id);
3161                 return -EINVAL;
3162         }
3163
3164         if (ehea_add_adapter_mr(adapter)) {
3165                 pr_err("creating MR failed\n");
3166                 return -EIO;
3167         }
3168
3169         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3170
3171         of_node_put(eth_dn);
3172
3173         if (port) {
3174                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3175                         if (!adapter->port[i]) {
3176                                 adapter->port[i] = port;
3177                                 break;
3178                         }
3179
3180                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3181                             logical_port_id);
3182         } else {
3183                 ehea_remove_adapter_mr(adapter);
3184                 return -EIO;
3185         }
3186
3187         return (ssize_t) count;
3188 }
3189
3190 static ssize_t ehea_remove_port(struct device *dev,
3191                                 struct device_attribute *attr,
3192                                 const char *buf, size_t count)
3193 {
3194         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3195         struct ehea_port *port;
3196         int i;
3197         u32 logical_port_id;
3198
3199         sscanf(buf, "%d", &logical_port_id);
3200
3201         port = ehea_get_port(adapter, logical_port_id);
3202
3203         if (port) {
3204                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3205                             logical_port_id);
3206
3207                 ehea_shutdown_single_port(port);
3208
3209                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3210                         if (adapter->port[i] == port) {
3211                                 adapter->port[i] = NULL;
3212                                 break;
3213                         }
3214         } else {
3215                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3216                        logical_port_id);
3217                 return -EINVAL;
3218         }
3219
3220         ehea_remove_adapter_mr(adapter);
3221
3222         return (ssize_t) count;
3223 }
3224
3225 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3226 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3227
3228 int ehea_create_device_sysfs(struct platform_device *dev)
3229 {
3230         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3231         if (ret)
3232                 goto out;
3233
3234         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3235 out:
3236         return ret;
3237 }
3238
3239 void ehea_remove_device_sysfs(struct platform_device *dev)
3240 {
3241         device_remove_file(&dev->dev, &dev_attr_probe_port);
3242         device_remove_file(&dev->dev, &dev_attr_remove_port);
3243 }
3244
3245 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3246                                         const struct of_device_id *id)
3247 {
3248         struct ehea_adapter *adapter;
3249         const u64 *adapter_handle;
3250         int ret;
3251
3252         if (!dev || !dev->dev.of_node) {
3253                 pr_err("Invalid ibmebus device probed\n");
3254                 return -EINVAL;
3255         }
3256
3257         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3258         if (!adapter) {
3259                 ret = -ENOMEM;
3260                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3261                 goto out;
3262         }
3263
3264         list_add(&adapter->list, &adapter_list);
3265
3266         adapter->ofdev = dev;
3267
3268         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3269                                          NULL);
3270         if (adapter_handle)
3271                 adapter->handle = *adapter_handle;
3272
3273         if (!adapter->handle) {
3274                 dev_err(&dev->dev, "failed getting handle for adapter"
3275                         " '%s'\n", dev->dev.of_node->full_name);
3276                 ret = -ENODEV;
3277                 goto out_free_ad;
3278         }
3279
3280         adapter->pd = EHEA_PD_ID;
3281
3282         dev_set_drvdata(&dev->dev, adapter);
3283
3284
3285         /* initialize adapter and ports */
3286         /* get adapter properties */
3287         ret = ehea_sense_adapter_attr(adapter);
3288         if (ret) {
3289                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3290                 goto out_free_ad;
3291         }
3292
3293         adapter->neq = ehea_create_eq(adapter,
3294                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3295         if (!adapter->neq) {
3296                 ret = -EIO;
3297                 dev_err(&dev->dev, "NEQ creation failed\n");
3298                 goto out_free_ad;
3299         }
3300
3301         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3302                      (unsigned long)adapter);
3303
3304         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3305                                   ehea_interrupt_neq, IRQF_DISABLED,
3306                                   "ehea_neq", adapter);
3307         if (ret) {
3308                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3309                 goto out_kill_eq;
3310         }
3311
3312         ret = ehea_create_device_sysfs(dev);
3313         if (ret)
3314                 goto out_free_irq;
3315
3316         ret = ehea_setup_ports(adapter);
3317         if (ret) {
3318                 dev_err(&dev->dev, "setup_ports failed\n");
3319                 goto out_rem_dev_sysfs;
3320         }
3321
3322         ret = 0;
3323         goto out;
3324
3325 out_rem_dev_sysfs:
3326         ehea_remove_device_sysfs(dev);
3327
3328 out_free_irq:
3329         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3330
3331 out_kill_eq:
3332         ehea_destroy_eq(adapter->neq);
3333
3334 out_free_ad:
3335         list_del(&adapter->list);
3336         kfree(adapter);
3337
3338 out:
3339         ehea_update_firmware_handles();
3340
3341         return ret;
3342 }
3343
3344 static int __devexit ehea_remove(struct platform_device *dev)
3345 {
3346         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3347         int i;
3348
3349         for (i = 0; i < EHEA_MAX_PORTS; i++)
3350                 if (adapter->port[i]) {
3351                         ehea_shutdown_single_port(adapter->port[i]);
3352                         adapter->port[i] = NULL;
3353                 }
3354
3355         ehea_remove_device_sysfs(dev);
3356
3357         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3358         tasklet_kill(&adapter->neq_tasklet);
3359
3360         ehea_destroy_eq(adapter->neq);
3361         ehea_remove_adapter_mr(adapter);
3362         list_del(&adapter->list);
3363         kfree(adapter);
3364
3365         ehea_update_firmware_handles();
3366
3367         return 0;
3368 }
3369
3370 void ehea_crash_handler(void)
3371 {
3372         int i;
3373
3374         if (ehea_fw_handles.arr)
3375                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3376                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3377                                              ehea_fw_handles.arr[i].fwh,
3378                                              FORCE_FREE);
3379
3380         if (ehea_bcmc_regs.arr)
3381                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3382                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3383                                               ehea_bcmc_regs.arr[i].port_id,
3384                                               ehea_bcmc_regs.arr[i].reg_type,
3385                                               ehea_bcmc_regs.arr[i].macaddr,
3386                                               0, H_DEREG_BCMC);
3387 }
3388
3389 static int ehea_mem_notifier(struct notifier_block *nb,
3390                              unsigned long action, void *data)
3391 {
3392         int ret = NOTIFY_BAD;
3393         struct memory_notify *arg = data;
3394
3395         mutex_lock(&dlpar_mem_lock);
3396
3397         switch (action) {
3398         case MEM_CANCEL_OFFLINE:
3399                 pr_info("memory offlining canceled");
3400                 /* Readd canceled memory block */
3401         case MEM_ONLINE:
3402                 pr_info("memory is going online");
3403                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3404                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3405                         goto out_unlock;
3406                 ehea_rereg_mrs();
3407                 break;
3408         case MEM_GOING_OFFLINE:
3409                 pr_info("memory is going offline");
3410                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3411                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3412                         goto out_unlock;
3413                 ehea_rereg_mrs();
3414                 break;
3415         default:
3416                 break;
3417         }
3418
3419         ehea_update_firmware_handles();
3420         ret = NOTIFY_OK;
3421
3422 out_unlock:
3423         mutex_unlock(&dlpar_mem_lock);
3424         return ret;
3425 }
3426
3427 static struct notifier_block ehea_mem_nb = {
3428         .notifier_call = ehea_mem_notifier,
3429 };
3430
3431 static int ehea_reboot_notifier(struct notifier_block *nb,
3432                                 unsigned long action, void *unused)
3433 {
3434         if (action == SYS_RESTART) {
3435                 pr_info("Reboot: freeing all eHEA resources\n");
3436                 ibmebus_unregister_driver(&ehea_driver);
3437         }
3438         return NOTIFY_DONE;
3439 }
3440
3441 static struct notifier_block ehea_reboot_nb = {
3442         .notifier_call = ehea_reboot_notifier,
3443 };
3444
3445 static int check_module_parm(void)
3446 {
3447         int ret = 0;
3448
3449         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3450             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3451                 pr_info("Bad parameter: rq1_entries\n");
3452                 ret = -EINVAL;
3453         }
3454         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3455             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3456                 pr_info("Bad parameter: rq2_entries\n");
3457                 ret = -EINVAL;
3458         }
3459         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3460             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3461                 pr_info("Bad parameter: rq3_entries\n");
3462                 ret = -EINVAL;
3463         }
3464         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3465             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3466                 pr_info("Bad parameter: sq_entries\n");
3467                 ret = -EINVAL;
3468         }
3469
3470         return ret;
3471 }
3472
3473 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3474                                       char *buf)
3475 {
3476         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3477 }
3478
3479 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3480                    ehea_show_capabilities, NULL);
3481
3482 int __init ehea_module_init(void)
3483 {
3484         int ret;
3485
3486         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3487
3488         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3489         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3490
3491         mutex_init(&ehea_fw_handles.lock);
3492         spin_lock_init(&ehea_bcmc_regs.lock);
3493
3494         ret = check_module_parm();
3495         if (ret)
3496                 goto out;
3497
3498         ret = ehea_create_busmap();
3499         if (ret)
3500                 goto out;
3501
3502         ret = register_reboot_notifier(&ehea_reboot_nb);
3503         if (ret)
3504                 pr_info("failed registering reboot notifier\n");
3505
3506         ret = register_memory_notifier(&ehea_mem_nb);
3507         if (ret)
3508                 pr_info("failed registering memory remove notifier\n");
3509
3510         ret = crash_shutdown_register(ehea_crash_handler);
3511         if (ret)
3512                 pr_info("failed registering crash handler\n");
3513
3514         ret = ibmebus_register_driver(&ehea_driver);
3515         if (ret) {
3516                 pr_err("failed registering eHEA device driver on ebus\n");
3517                 goto out2;
3518         }
3519
3520         ret = driver_create_file(&ehea_driver.driver,
3521                                  &driver_attr_capabilities);
3522         if (ret) {
3523                 pr_err("failed to register capabilities attribute, ret=%d\n",
3524                        ret);
3525                 goto out3;
3526         }
3527
3528         return ret;
3529
3530 out3:
3531         ibmebus_unregister_driver(&ehea_driver);
3532 out2:
3533         unregister_memory_notifier(&ehea_mem_nb);
3534         unregister_reboot_notifier(&ehea_reboot_nb);
3535         crash_shutdown_unregister(ehea_crash_handler);
3536 out:
3537         return ret;
3538 }
3539
3540 static void __exit ehea_module_exit(void)
3541 {
3542         int ret;
3543
3544         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3545         ibmebus_unregister_driver(&ehea_driver);
3546         unregister_reboot_notifier(&ehea_reboot_nb);
3547         ret = crash_shutdown_unregister(ehea_crash_handler);
3548         if (ret)
3549                 pr_info("failed unregistering crash handler\n");
3550         unregister_memory_notifier(&ehea_mem_nb);
3551         kfree(ehea_fw_handles.arr);
3552         kfree(ehea_bcmc_regs.arr);
3553         ehea_destroy_busmap();
3554 }
3555
3556 module_init(ehea_module_init);
3557 module_exit(ehea_module_exit);