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

   1 /*
   2  *  linux/drivers/net/ethernet/ibm/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/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 static struct ehea_fw_handle_array ehea_fw_handles;
  98 static 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 static 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_MULTICAST |
 294                                                   EHEA_BCMC_UNTAGGED;
 295                                 if (mc_entry->macaddr == 0)
 296                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 297                                 arr[i++].macaddr = mc_entry->macaddr;
 298
 299                                 arr[i].adh = adapter->handle;
 300                                 arr[i].port_id = port->logical_port_id;
 301                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 302                                                   EHEA_BCMC_VLANID_ALL;
 303                                 if (mc_entry->macaddr == 0)
 304                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 305                                 arr[i++].macaddr = mc_entry->macaddr;
 306                                 num_registrations -= 2;
 307                         }
 308                 }
 309         }
 310
 311 out_update:
 312         kfree(ehea_bcmc_regs.arr);
 313         ehea_bcmc_regs.arr = arr;
 314         ehea_bcmc_regs.num_entries = i;
 315 out:
 316         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 317 }
 318
 319 static struct rtnl_link_stats64 *ehea_get_stats64(struct net_device *dev,
 320                                         struct rtnl_link_stats64 *stats)
 321 {
 322         struct ehea_port *port = netdev_priv(dev);
 323         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 324         int i;
 325
 326         for (i = 0; i < port->num_def_qps; i++) {
 327                 rx_packets += port->port_res[i].rx_packets;
 328                 rx_bytes   += port->port_res[i].rx_bytes;
 329         }
 330
 331         for (i = 0; i < port->num_def_qps; i++) {
 332                 tx_packets += port->port_res[i].tx_packets;
 333                 tx_bytes   += port->port_res[i].tx_bytes;
 334         }
 335
 336         stats->tx_packets = tx_packets;
 337         stats->rx_bytes = rx_bytes;
 338         stats->tx_bytes = tx_bytes;
 339         stats->rx_packets = rx_packets;
 340
 341         stats->multicast = port->stats.multicast;
 342         stats->rx_errors = port->stats.rx_errors;
 343         return stats;
 344 }
 345
 346 static void ehea_update_stats(struct work_struct *work)
 347 {
 348         struct ehea_port *port =
 349                 container_of(work, struct ehea_port, stats_work.work);
 350         struct net_device *dev = port->netdev;
 351         struct rtnl_link_stats64 *stats = &port->stats;
 352         struct hcp_ehea_port_cb2 *cb2;
 353         u64 hret;
 354
 355         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 356         if (!cb2) {
 357                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 358                 goto resched;
 359         }
 360
 361         hret = ehea_h_query_ehea_port(port->adapter->handle,
 362                                       port->logical_port_id,
 363                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 364         if (hret != H_SUCCESS) {
 365                 netdev_err(dev, "query_ehea_port failed\n");
 366                 goto out_herr;
 367         }
 368
 369         if (netif_msg_hw(port))
 370                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 371
 372         stats->multicast = cb2->rxmcp;
 373         stats->rx_errors = cb2->rxuerr;
 374
 375 out_herr:
 376         free_page((unsigned long)cb2);
 377 resched:
 378         schedule_delayed_work(&port->stats_work,
 379                               round_jiffies_relative(msecs_to_jiffies(1000)));
 380 }
 381
 382 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 383 {
 384         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 385         struct net_device *dev = pr->port->netdev;
 386         int max_index_mask = pr->rq1_skba.len - 1;
 387         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 388         int adder = 0;
 389         int i;
 390
 391         pr->rq1_skba.os_skbs = 0;
 392
 393         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 394                 if (nr_of_wqes > 0)
 395                         pr->rq1_skba.index = index;
 396                 pr->rq1_skba.os_skbs = fill_wqes;
 397                 return;
 398         }
 399
 400         for (i = 0; i < fill_wqes; i++) {
 401                 if (!skb_arr_rq1[index]) {
 402                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 403                                                               EHEA_L_PKT_SIZE);
 404                         if (!skb_arr_rq1[index]) {
 405                                 netdev_info(dev, "Unable to allocate enough skb in the array\n");
 406                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 407                                 break;
 408                         }
 409                 }
 410                 index--;
 411                 index &= max_index_mask;
 412                 adder++;
 413         }
 414
 415         if (adder == 0)
 416                 return;
 417
 418         /* Ring doorbell */
 419         ehea_update_rq1a(pr->qp, adder);
 420 }
 421
 422 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 423 {
 424         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 425         struct net_device *dev = pr->port->netdev;
 426         int i;
 427
 428         if (nr_rq1a > pr->rq1_skba.len) {
 429                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 430                 return;
 431         }
 432
 433         for (i = 0; i < nr_rq1a; i++) {
 434                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 435                 if (!skb_arr_rq1[i]) {
 436                         netdev_info(dev, "Not enough memory to allocate skb array\n");
 437                         break;
 438                 }
 439         }
 440         /* Ring doorbell */
 441         ehea_update_rq1a(pr->qp, i - 1);
 442 }
 443
 444 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 445                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 446                               int num_wqes, int wqe_type, int packet_size)
 447 {
 448         struct net_device *dev = pr->port->netdev;
 449         struct ehea_qp *qp = pr->qp;
 450         struct sk_buff **skb_arr = q_skba->arr;
 451         struct ehea_rwqe *rwqe;
 452         int i, index, max_index_mask, fill_wqes;
 453         int adder = 0;
 454         int ret = 0;
 455
 456         fill_wqes = q_skba->os_skbs + num_wqes;
 457         q_skba->os_skbs = 0;
 458
 459         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 460                 q_skba->os_skbs = fill_wqes;
 461                 return ret;
 462         }
 463
 464         index = q_skba->index;
 465         max_index_mask = q_skba->len - 1;
 466         for (i = 0; i < fill_wqes; i++) {
 467                 u64 tmp_addr;
 468                 struct sk_buff *skb;
 469
 470                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 471                 if (!skb) {
 472                         q_skba->os_skbs = fill_wqes - i;
 473                         if (q_skba->os_skbs == q_skba->len - 2) {
 474                                 netdev_info(pr->port->netdev,
 475                                             "rq%i ran dry - no mem for skb\n",
 476                                             rq_nr);
 477                                 ret = -ENOMEM;
 478                         }
 479                         break;
 480                 }
 481
 482                 skb_arr[index] = skb;
 483                 tmp_addr = ehea_map_vaddr(skb->data);
 484                 if (tmp_addr == -1) {
 485                         dev_kfree_skb(skb);
 486                         q_skba->os_skbs = fill_wqes - i;
 487                         ret = 0;
 488                         break;
 489                 }
 490
 491                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 492                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 493                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 494                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 495                 rwqe->sg_list[0].vaddr = tmp_addr;
 496                 rwqe->sg_list[0].len = packet_size;
 497                 rwqe->data_segments = 1;
 498
 499                 index++;
 500                 index &= max_index_mask;
 501                 adder++;
 502         }
 503
 504         q_skba->index = index;
 505         if (adder == 0)
 506                 goto out;
 507
 508         /* Ring doorbell */
 509         iosync();
 510         if (rq_nr == 2)
 511                 ehea_update_rq2a(pr->qp, adder);
 512         else
 513                 ehea_update_rq3a(pr->qp, adder);
 514 out:
 515         return ret;
 516 }
 517
 518
 519 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 520 {
 521         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 522                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 523                                   EHEA_RQ2_PKT_SIZE);
 524 }
 525
 526
 527 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 528 {
 529         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 530                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 531                                   EHEA_MAX_PACKET_SIZE);
 532 }
 533
 534 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 535 {
 536         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 537         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 538                 return 0;
 539         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 540             (cqe->header_length == 0))
 541                 return 0;
 542         return -EINVAL;
 543 }
 544
 545 static inline void ehea_fill_skb(struct net_device *dev,
 546                                  struct sk_buff *skb, struct ehea_cqe *cqe,
 547                                  struct ehea_port_res *pr)
 548 {
 549         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 550
 551         skb_put(skb, length);
 552         skb->protocol = eth_type_trans(skb, dev);
 553
 554         /* The packet was not an IPV4 packet so a complemented checksum was
 555            calculated. The value is found in the Internet Checksum field. */
 556         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 557                 skb->ip_summed = CHECKSUM_COMPLETE;
 558                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 559         } else
 560                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 561
 562         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 563 }
 564
 565 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 566                                                int arr_len,
 567                                                struct ehea_cqe *cqe)
 568 {
 569         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 570         struct sk_buff *skb;
 571         void *pref;
 572         int x;
 573
 574         x = skb_index + 1;
 575         x &= (arr_len - 1);
 576
 577         pref = skb_array[x];
 578         if (pref) {
 579                 prefetchw(pref);
 580                 prefetchw(pref + EHEA_CACHE_LINE);
 581
 582                 pref = (skb_array[x]->data);
 583                 prefetch(pref);
 584                 prefetch(pref + EHEA_CACHE_LINE);
 585                 prefetch(pref + EHEA_CACHE_LINE * 2);
 586                 prefetch(pref + EHEA_CACHE_LINE * 3);
 587         }
 588
 589         skb = skb_array[skb_index];
 590         skb_array[skb_index] = NULL;
 591         return skb;
 592 }
 593
 594 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 595                                                   int arr_len, int wqe_index)
 596 {
 597         struct sk_buff *skb;
 598         void *pref;
 599         int x;
 600
 601         x = wqe_index + 1;
 602         x &= (arr_len - 1);
 603
 604         pref = skb_array[x];
 605         if (pref) {
 606                 prefetchw(pref);
 607                 prefetchw(pref + EHEA_CACHE_LINE);
 608
 609                 pref = (skb_array[x]->data);
 610                 prefetchw(pref);
 611                 prefetchw(pref + EHEA_CACHE_LINE);
 612         }
 613
 614         skb = skb_array[wqe_index];
 615         skb_array[wqe_index] = NULL;
 616         return skb;
 617 }
 618
 619 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 620                                  struct ehea_cqe *cqe, int *processed_rq2,
 621                                  int *processed_rq3)
 622 {
 623         struct sk_buff *skb;
 624
 625         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 626                 pr->p_stats.err_tcp_cksum++;
 627         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 628                 pr->p_stats.err_ip_cksum++;
 629         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 630                 pr->p_stats.err_frame_crc++;
 631
 632         if (rq == 2) {
 633                 *processed_rq2 += 1;
 634                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 635                 dev_kfree_skb(skb);
 636         } else if (rq == 3) {
 637                 *processed_rq3 += 1;
 638                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 639                 dev_kfree_skb(skb);
 640         }
 641
 642         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 643                 if (netif_msg_rx_err(pr->port)) {
 644                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 645                                pr->qp->init_attr.qp_nr);
 646                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 647                 }
 648                 ehea_schedule_port_reset(pr->port);
 649                 return 1;
 650         }
 651
 652         return 0;
 653 }
 654
 655 static int ehea_proc_rwqes(struct net_device *dev,
 656                            struct ehea_port_res *pr,
 657                            int budget)
 658 {
 659         struct ehea_port *port = pr->port;
 660         struct ehea_qp *qp = pr->qp;
 661         struct ehea_cqe *cqe;
 662         struct sk_buff *skb;
 663         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 664         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 665         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 666         int skb_arr_rq1_len = pr->rq1_skba.len;
 667         int skb_arr_rq2_len = pr->rq2_skba.len;
 668         int skb_arr_rq3_len = pr->rq3_skba.len;
 669         int processed, processed_rq1, processed_rq2, processed_rq3;
 670         u64 processed_bytes = 0;
 671         int wqe_index, last_wqe_index, rq, port_reset;
 672
 673         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 674         last_wqe_index = 0;
 675
 676         cqe = ehea_poll_rq1(qp, &wqe_index);
 677         while ((processed < budget) && cqe) {
 678                 ehea_inc_rq1(qp);
 679                 processed_rq1++;
 680                 processed++;
 681                 if (netif_msg_rx_status(port))
 682                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 683
 684                 last_wqe_index = wqe_index;
 685                 rmb();
 686                 if (!ehea_check_cqe(cqe, &rq)) {
 687                         if (rq == 1) {
 688                                 /* LL RQ1 */
 689                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 690                                                           skb_arr_rq1_len,
 691                                                           wqe_index);
 692                                 if (unlikely(!skb)) {
 693                                         netif_info(port, rx_err, dev,
 694                                                   "LL rq1: skb=NULL\n");
 695
 696                                         skb = netdev_alloc_skb(dev,
 697                                                                EHEA_L_PKT_SIZE);
 698                                         if (!skb) {
 699                                                 netdev_err(dev, "Not enough memory to allocate skb\n");
 700                                                 break;
 701                                         }
 702                                 }
 703                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 704                                                  cqe->num_bytes_transfered - 4);
 705                                 ehea_fill_skb(dev, skb, cqe, pr);
 706                         } else if (rq == 2) {
 707                                 /* RQ2 */
 708                                 skb = get_skb_by_index(skb_arr_rq2,
 709                                                        skb_arr_rq2_len, cqe);
 710                                 if (unlikely(!skb)) {
 711                                         netif_err(port, rx_err, dev,
 712                                                   "rq2: skb=NULL\n");
 713                                         break;
 714                                 }
 715                                 ehea_fill_skb(dev, skb, cqe, pr);
 716                                 processed_rq2++;
 717                         } else {
 718                                 /* RQ3 */
 719                                 skb = get_skb_by_index(skb_arr_rq3,
 720                                                        skb_arr_rq3_len, cqe);
 721                                 if (unlikely(!skb)) {
 722                                         netif_err(port, rx_err, dev,
 723                                                   "rq3: skb=NULL\n");
 724                                         break;
 725                                 }
 726                                 ehea_fill_skb(dev, skb, cqe, pr);
 727                                 processed_rq3++;
 728                         }
 729
 730                         processed_bytes += skb->len;
 731
 732                         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 733                                 __vlan_hwaccel_put_tag(skb, cqe->vlan_tag);
 734
 735                         napi_gro_receive(&pr->napi, skb);
 736                 } else {
 737                         pr->p_stats.poll_receive_errors++;
 738                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 739                                                            &processed_rq2,
 740                                                            &processed_rq3);
 741                         if (port_reset)
 742                                 break;
 743                 }
 744                 cqe = ehea_poll_rq1(qp, &wqe_index);
 745         }
 746
 747         pr->rx_packets += processed;
 748         pr->rx_bytes += processed_bytes;
 749
 750         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 751         ehea_refill_rq2(pr, processed_rq2);
 752         ehea_refill_rq3(pr, processed_rq3);
 753
 754         return processed;
 755 }
 756
 757 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 758
 759 static void reset_sq_restart_flag(struct ehea_port *port)
 760 {
 761         int i;
 762
 763         for (i = 0; i < port->num_def_qps; i++) {
 764                 struct ehea_port_res *pr = &port->port_res[i];
 765                 pr->sq_restart_flag = 0;
 766         }
 767         wake_up(&port->restart_wq);
 768 }
 769
 770 static void check_sqs(struct ehea_port *port)
 771 {
 772         struct ehea_swqe *swqe;
 773         int swqe_index;
 774         int i, k;
 775
 776         for (i = 0; i < port->num_def_qps; i++) {
 777                 struct ehea_port_res *pr = &port->port_res[i];
 778                 int ret;
 779                 k = 0;
 780                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 781                 memset(swqe, 0, SWQE_HEADER_SIZE);
 782                 atomic_dec(&pr->swqe_avail);
 783
 784                 swqe->tx_control |= EHEA_SWQE_PURGE;
 785                 swqe->wr_id = SWQE_RESTART_CHECK;
 786                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 787                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 788                 swqe->immediate_data_length = 80;
 789
 790                 ehea_post_swqe(pr->qp, swqe);
 791
 792                 ret = wait_event_timeout(port->restart_wq,
 793                                          pr->sq_restart_flag == 0,
 794                                          msecs_to_jiffies(100));
 795
 796                 if (!ret) {
 797                         pr_err("HW/SW queues out of sync\n");
 798                         ehea_schedule_port_reset(pr->port);
 799                         return;
 800                 }
 801         }
 802 }
 803
 804
 805 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 806 {
 807         struct sk_buff *skb;
 808         struct ehea_cq *send_cq = pr->send_cq;
 809         struct ehea_cqe *cqe;
 810         int quota = my_quota;
 811         int cqe_counter = 0;
 812         int swqe_av = 0;
 813         int index;
 814         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 815                                                 pr - &pr->port->port_res[0]);
 816
 817         cqe = ehea_poll_cq(send_cq);
 818         while (cqe && (quota > 0)) {
 819                 ehea_inc_cq(send_cq);
 820
 821                 cqe_counter++;
 822                 rmb();
 823
 824                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 825                         pr->sq_restart_flag = 1;
 826                         swqe_av++;
 827                         break;
 828                 }
 829
 830                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 831                         pr_err("Bad send completion status=0x%04X\n",
 832                                cqe->status);
 833
 834                         if (netif_msg_tx_err(pr->port))
 835                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 836
 837                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 838                                 pr_err("Resetting port\n");
 839                                 ehea_schedule_port_reset(pr->port);
 840                                 break;
 841                         }
 842                 }
 843
 844                 if (netif_msg_tx_done(pr->port))
 845                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 846
 847                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 848                            == EHEA_SWQE2_TYPE)) {
 849
 850                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 851                         skb = pr->sq_skba.arr[index];
 852                         dev_kfree_skb(skb);
 853                         pr->sq_skba.arr[index] = NULL;
 854                 }
 855
 856                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 857                 quota--;
 858
 859                 cqe = ehea_poll_cq(send_cq);
 860         }
 861
 862         ehea_update_feca(send_cq, cqe_counter);
 863         atomic_add(swqe_av, &pr->swqe_avail);
 864
 865         if (unlikely(netif_tx_queue_stopped(txq) &&
 866                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 867                 __netif_tx_lock(txq, smp_processor_id());
 868                 if (netif_tx_queue_stopped(txq) &&
 869                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 870                         netif_tx_wake_queue(txq);
 871                 __netif_tx_unlock(txq);
 872         }
 873
 874         wake_up(&pr->port->swqe_avail_wq);
 875
 876         return cqe;
 877 }
 878
 879 #define EHEA_POLL_MAX_CQES 65535
 880
 881 static int ehea_poll(struct napi_struct *napi, int budget)
 882 {
 883         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 884                                                 napi);
 885         struct net_device *dev = pr->port->netdev;
 886         struct ehea_cqe *cqe;
 887         struct ehea_cqe *cqe_skb = NULL;
 888         int wqe_index;
 889         int rx = 0;
 890
 891         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 892         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 893
 894         while (rx != budget) {
 895                 napi_complete(napi);
 896                 ehea_reset_cq_ep(pr->recv_cq);
 897                 ehea_reset_cq_ep(pr->send_cq);
 898                 ehea_reset_cq_n1(pr->recv_cq);
 899                 ehea_reset_cq_n1(pr->send_cq);
 900                 rmb();
 901                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 902                 cqe_skb = ehea_poll_cq(pr->send_cq);
 903
 904                 if (!cqe && !cqe_skb)
 905                         return rx;
 906
 907                 if (!napi_reschedule(napi))
 908                         return rx;
 909
 910                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 911                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 912         }
 913
 914         return rx;
 915 }
 916
 917 #ifdef CONFIG_NET_POLL_CONTROLLER
 918 static void ehea_netpoll(struct net_device *dev)
 919 {
 920         struct ehea_port *port = netdev_priv(dev);
 921         int i;
 922
 923         for (i = 0; i < port->num_def_qps; i++)
 924                 napi_schedule(&port->port_res[i].napi);
 925 }
 926 #endif
 927
 928 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 929 {
 930         struct ehea_port_res *pr = param;
 931
 932         napi_schedule(&pr->napi);
 933
 934         return IRQ_HANDLED;
 935 }
 936
 937 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 938 {
 939         struct ehea_port *port = param;
 940         struct ehea_eqe *eqe;
 941         struct ehea_qp *qp;
 942         u32 qp_token;
 943         u64 resource_type, aer, aerr;
 944         int reset_port = 0;
 945
 946         eqe = ehea_poll_eq(port->qp_eq);
 947
 948         while (eqe) {
 949                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 950                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 951                        eqe->entry, qp_token);
 952
 953                 qp = port->port_res[qp_token].qp;
 954
 955                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 956                                                 &aer, &aerr);
 957
 958                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 959                         if ((aer & EHEA_AER_RESET_MASK) ||
 960                             (aerr & EHEA_AERR_RESET_MASK))
 961                                  reset_port = 1;
 962                 } else
 963                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 964
 965                 eqe = ehea_poll_eq(port->qp_eq);
 966         }
 967
 968         if (reset_port) {
 969                 pr_err("Resetting port\n");
 970                 ehea_schedule_port_reset(port);
 971         }
 972
 973         return IRQ_HANDLED;
 974 }
 975
 976 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 977                                        int logical_port)
 978 {
 979         int i;
 980
 981         for (i = 0; i < EHEA_MAX_PORTS; i++)
 982                 if (adapter->port[i])
 983                         if (adapter->port[i]->logical_port_id == logical_port)
 984                                 return adapter->port[i];
 985         return NULL;
 986 }
 987
 988 int ehea_sense_port_attr(struct ehea_port *port)
 989 {
 990         int ret;
 991         u64 hret;
 992         struct hcp_ehea_port_cb0 *cb0;
 993
 994         /* may be called via ehea_neq_tasklet() */
 995         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 996         if (!cb0) {
 997                 pr_err("no mem for cb0\n");
 998                 ret = -ENOMEM;
 999                 goto out;
1000         }
1001
1002         hret = ehea_h_query_ehea_port(port->adapter->handle,
1003                                       port->logical_port_id, H_PORT_CB0,
1004                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1005                                       cb0);
1006         if (hret != H_SUCCESS) {
1007                 ret = -EIO;
1008                 goto out_free;
1009         }
1010
1011         /* MAC address */
1012         port->mac_addr = cb0->port_mac_addr << 16;
1013
1014         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1015                 ret = -EADDRNOTAVAIL;
1016                 goto out_free;
1017         }
1018
1019         /* Port speed */
1020         switch (cb0->port_speed) {
1021         case H_SPEED_10M_H:
1022                 port->port_speed = EHEA_SPEED_10M;
1023                 port->full_duplex = 0;
1024                 break;
1025         case H_SPEED_10M_F:
1026                 port->port_speed = EHEA_SPEED_10M;
1027                 port->full_duplex = 1;
1028                 break;
1029         case H_SPEED_100M_H:
1030                 port->port_speed = EHEA_SPEED_100M;
1031                 port->full_duplex = 0;
1032                 break;
1033         case H_SPEED_100M_F:
1034                 port->port_speed = EHEA_SPEED_100M;
1035                 port->full_duplex = 1;
1036                 break;
1037         case H_SPEED_1G_F:
1038                 port->port_speed = EHEA_SPEED_1G;
1039                 port->full_duplex = 1;
1040                 break;
1041         case H_SPEED_10G_F:
1042                 port->port_speed = EHEA_SPEED_10G;
1043                 port->full_duplex = 1;
1044                 break;
1045         default:
1046                 port->port_speed = 0;
1047                 port->full_duplex = 0;
1048                 break;
1049         }
1050
1051         port->autoneg = 1;
1052         port->num_mcs = cb0->num_default_qps;
1053
1054         /* Number of default QPs */
1055         if (use_mcs)
1056                 port->num_def_qps = cb0->num_default_qps;
1057         else
1058                 port->num_def_qps = 1;
1059
1060         if (!port->num_def_qps) {
1061                 ret = -EINVAL;
1062                 goto out_free;
1063         }
1064
1065         ret = 0;
1066 out_free:
1067         if (ret || netif_msg_probe(port))
1068                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1069         free_page((unsigned long)cb0);
1070 out:
1071         return ret;
1072 }
1073
1074 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1075 {
1076         struct hcp_ehea_port_cb4 *cb4;
1077         u64 hret;
1078         int ret = 0;
1079
1080         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1081         if (!cb4) {
1082                 pr_err("no mem for cb4\n");
1083                 ret = -ENOMEM;
1084                 goto out;
1085         }
1086
1087         cb4->port_speed = port_speed;
1088
1089         netif_carrier_off(port->netdev);
1090
1091         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1092                                        port->logical_port_id,
1093                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1094         if (hret == H_SUCCESS) {
1095                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1096
1097                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1098                                               port->logical_port_id,
1099                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1100                                               cb4);
1101                 if (hret == H_SUCCESS) {
1102                         switch (cb4->port_speed) {
1103                         case H_SPEED_10M_H:
1104                                 port->port_speed = EHEA_SPEED_10M;
1105                                 port->full_duplex = 0;
1106                                 break;
1107                         case H_SPEED_10M_F:
1108                                 port->port_speed = EHEA_SPEED_10M;
1109                                 port->full_duplex = 1;
1110                                 break;
1111                         case H_SPEED_100M_H:
1112                                 port->port_speed = EHEA_SPEED_100M;
1113                                 port->full_duplex = 0;
1114                                 break;
1115                         case H_SPEED_100M_F:
1116                                 port->port_speed = EHEA_SPEED_100M;
1117                                 port->full_duplex = 1;
1118                                 break;
1119                         case H_SPEED_1G_F:
1120                                 port->port_speed = EHEA_SPEED_1G;
1121                                 port->full_duplex = 1;
1122                                 break;
1123                         case H_SPEED_10G_F:
1124                                 port->port_speed = EHEA_SPEED_10G;
1125                                 port->full_duplex = 1;
1126                                 break;
1127                         default:
1128                                 port->port_speed = 0;
1129                                 port->full_duplex = 0;
1130                                 break;
1131                         }
1132                 } else {
1133                         pr_err("Failed sensing port speed\n");
1134                         ret = -EIO;
1135                 }
1136         } else {
1137                 if (hret == H_AUTHORITY) {
1138                         pr_info("Hypervisor denied setting port speed\n");
1139                         ret = -EPERM;
1140                 } else {
1141                         ret = -EIO;
1142                         pr_err("Failed setting port speed\n");
1143                 }
1144         }
1145         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1146                 netif_carrier_on(port->netdev);
1147
1148         free_page((unsigned long)cb4);
1149 out:
1150         return ret;
1151 }
1152
1153 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1154 {
1155         int ret;
1156         u8 ec;
1157         u8 portnum;
1158         struct ehea_port *port;
1159         struct net_device *dev;
1160
1161         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1162         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1163         port = ehea_get_port(adapter, portnum);
1164         dev = port->netdev;
1165
1166         switch (ec) {
1167         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1168
1169                 if (!port) {
1170                         netdev_err(dev, "unknown portnum %x\n", portnum);
1171                         break;
1172                 }
1173
1174                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1175                         if (!netif_carrier_ok(dev)) {
1176                                 ret = ehea_sense_port_attr(port);
1177                                 if (ret) {
1178                                         netdev_err(dev, "failed resensing port attributes\n");
1179                                         break;
1180                                 }
1181
1182                                 netif_info(port, link, dev,
1183                                            "Logical port up: %dMbps %s Duplex\n",
1184                                            port->port_speed,
1185                                            port->full_duplex == 1 ?
1186                                            "Full" : "Half");
1187
1188                                 netif_carrier_on(dev);
1189                                 netif_wake_queue(dev);
1190                         }
1191                 } else
1192                         if (netif_carrier_ok(dev)) {
1193                                 netif_info(port, link, dev,
1194                                            "Logical port down\n");
1195                                 netif_carrier_off(dev);
1196                                 netif_tx_disable(dev);
1197                         }
1198
1199                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1200                         port->phy_link = EHEA_PHY_LINK_UP;
1201                         netif_info(port, link, dev,
1202                                    "Physical port up\n");
1203                         if (prop_carrier_state)
1204                                 netif_carrier_on(dev);
1205                 } else {
1206                         port->phy_link = EHEA_PHY_LINK_DOWN;
1207                         netif_info(port, link, dev,
1208                                    "Physical port down\n");
1209                         if (prop_carrier_state)
1210                                 netif_carrier_off(dev);
1211                 }
1212
1213                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1214                         netdev_info(dev,
1215                                     "External switch port is primary port\n");
1216                 else
1217                         netdev_info(dev,
1218                                     "External switch port is backup port\n");
1219
1220                 break;
1221         case EHEA_EC_ADAPTER_MALFUNC:
1222                 netdev_err(dev, "Adapter malfunction\n");
1223                 break;
1224         case EHEA_EC_PORT_MALFUNC:
1225                 netdev_info(dev, "Port malfunction\n");
1226                 netif_carrier_off(dev);
1227                 netif_tx_disable(dev);
1228                 break;
1229         default:
1230                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1231                 break;
1232         }
1233 }
1234
1235 static void ehea_neq_tasklet(unsigned long data)
1236 {
1237         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1238         struct ehea_eqe *eqe;
1239         u64 event_mask;
1240
1241         eqe = ehea_poll_eq(adapter->neq);
1242         pr_debug("eqe=%p\n", eqe);
1243
1244         while (eqe) {
1245                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1246                 ehea_parse_eqe(adapter, eqe->entry);
1247                 eqe = ehea_poll_eq(adapter->neq);
1248                 pr_debug("next eqe=%p\n", eqe);
1249         }
1250
1251         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1252                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1253                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1254
1255         ehea_h_reset_events(adapter->handle,
1256                             adapter->neq->fw_handle, event_mask);
1257 }
1258
1259 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1260 {
1261         struct ehea_adapter *adapter = param;
1262         tasklet_hi_schedule(&adapter->neq_tasklet);
1263         return IRQ_HANDLED;
1264 }
1265
1266
1267 static int ehea_fill_port_res(struct ehea_port_res *pr)
1268 {
1269         int ret;
1270         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1271
1272         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1273
1274         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1275
1276         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1277
1278         return ret;
1279 }
1280
1281 static int ehea_reg_interrupts(struct net_device *dev)
1282 {
1283         struct ehea_port *port = netdev_priv(dev);
1284         struct ehea_port_res *pr;
1285         int i, ret;
1286
1287
1288         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1289                  dev->name);
1290
1291         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1292                                   ehea_qp_aff_irq_handler,
1293                                   IRQF_DISABLED, port->int_aff_name, port);
1294         if (ret) {
1295                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1296                            port->qp_eq->attr.ist1);
1297                 goto out_free_qpeq;
1298         }
1299
1300         netif_info(port, ifup, dev,
1301                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1302                    port->qp_eq->attr.ist1);
1303
1304
1305         for (i = 0; i < port->num_def_qps; i++) {
1306                 pr = &port->port_res[i];
1307                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1308                          "%s-queue%d", dev->name, i);
1309                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1310                                           ehea_recv_irq_handler,
1311                                           IRQF_DISABLED, pr->int_send_name,
1312                                           pr);
1313                 if (ret) {
1314                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1315                                    i, pr->eq->attr.ist1);
1316                         goto out_free_req;
1317                 }
1318                 netif_info(port, ifup, dev,
1319                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1320                            pr->eq->attr.ist1, i);
1321         }
1322 out:
1323         return ret;
1324
1325
1326 out_free_req:
1327         while (--i >= 0) {
1328                 u32 ist = port->port_res[i].eq->attr.ist1;
1329                 ibmebus_free_irq(ist, &port->port_res[i]);
1330         }
1331
1332 out_free_qpeq:
1333         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1334         i = port->num_def_qps;
1335
1336         goto out;
1337
1338 }
1339
1340 static void ehea_free_interrupts(struct net_device *dev)
1341 {
1342         struct ehea_port *port = netdev_priv(dev);
1343         struct ehea_port_res *pr;
1344         int i;
1345
1346         /* send */
1347
1348         for (i = 0; i < port->num_def_qps; i++) {
1349                 pr = &port->port_res[i];
1350                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1351                 netif_info(port, intr, dev,
1352                            "free send irq for res %d with handle 0x%X\n",
1353                            i, pr->eq->attr.ist1);
1354         }
1355
1356         /* associated events */
1357         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1358         netif_info(port, intr, dev,
1359                    "associated event interrupt for handle 0x%X freed\n",
1360                    port->qp_eq->attr.ist1);
1361 }
1362
1363 static int ehea_configure_port(struct ehea_port *port)
1364 {
1365         int ret, i;
1366         u64 hret, mask;
1367         struct hcp_ehea_port_cb0 *cb0;
1368
1369         ret = -ENOMEM;
1370         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1371         if (!cb0)
1372                 goto out;
1373
1374         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1375                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1376                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1377                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1378                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1379                                       PXLY_RC_VLAN_FILTER)
1380                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1381
1382         for (i = 0; i < port->num_mcs; i++)
1383                 if (use_mcs)
1384                         cb0->default_qpn_arr[i] =
1385                                 port->port_res[i].qp->init_attr.qp_nr;
1386                 else
1387                         cb0->default_qpn_arr[i] =
1388                                 port->port_res[0].qp->init_attr.qp_nr;
1389
1390         if (netif_msg_ifup(port))
1391                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1392
1393         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1394              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1395
1396         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1397                                        port->logical_port_id,
1398                                        H_PORT_CB0, mask, cb0);
1399         ret = -EIO;
1400         if (hret != H_SUCCESS)
1401                 goto out_free;
1402
1403         ret = 0;
1404
1405 out_free:
1406         free_page((unsigned long)cb0);
1407 out:
1408         return ret;
1409 }
1410
1411 static int ehea_gen_smrs(struct ehea_port_res *pr)
1412 {
1413         int ret;
1414         struct ehea_adapter *adapter = pr->port->adapter;
1415
1416         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1417         if (ret)
1418                 goto out;
1419
1420         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1421         if (ret)
1422                 goto out_free;
1423
1424         return 0;
1425
1426 out_free:
1427         ehea_rem_mr(&pr->send_mr);
1428 out:
1429         pr_err("Generating SMRS failed\n");
1430         return -EIO;
1431 }
1432
1433 static int ehea_rem_smrs(struct ehea_port_res *pr)
1434 {
1435         if ((ehea_rem_mr(&pr->send_mr)) ||
1436             (ehea_rem_mr(&pr->recv_mr)))
1437                 return -EIO;
1438         else
1439                 return 0;
1440 }
1441
1442 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1443 {
1444         int arr_size = sizeof(void *) * max_q_entries;
1445
1446         q_skba->arr = vzalloc(arr_size);
1447         if (!q_skba->arr)
1448                 return -ENOMEM;
1449
1450         q_skba->len = max_q_entries;
1451         q_skba->index = 0;
1452         q_skba->os_skbs = 0;
1453
1454         return 0;
1455 }
1456
1457 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1458                               struct port_res_cfg *pr_cfg, int queue_token)
1459 {
1460         struct ehea_adapter *adapter = port->adapter;
1461         enum ehea_eq_type eq_type = EHEA_EQ;
1462         struct ehea_qp_init_attr *init_attr = NULL;
1463         int ret = -EIO;
1464         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1465
1466         tx_bytes = pr->tx_bytes;
1467         tx_packets = pr->tx_packets;
1468         rx_bytes = pr->rx_bytes;
1469         rx_packets = pr->rx_packets;
1470
1471         memset(pr, 0, sizeof(struct ehea_port_res));
1472
1473         pr->tx_bytes = rx_bytes;
1474         pr->tx_packets = tx_packets;
1475         pr->rx_bytes = rx_bytes;
1476         pr->rx_packets = rx_packets;
1477
1478         pr->port = port;
1479
1480         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1481         if (!pr->eq) {
1482                 pr_err("create_eq failed (eq)\n");
1483                 goto out_free;
1484         }
1485
1486         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1487                                      pr->eq->fw_handle,
1488                                      port->logical_port_id);
1489         if (!pr->recv_cq) {
1490                 pr_err("create_cq failed (cq_recv)\n");
1491                 goto out_free;
1492         }
1493
1494         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1495                                      pr->eq->fw_handle,
1496                                      port->logical_port_id);
1497         if (!pr->send_cq) {
1498                 pr_err("create_cq failed (cq_send)\n");
1499                 goto out_free;
1500         }
1501
1502         if (netif_msg_ifup(port))
1503                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1504                         pr->send_cq->attr.act_nr_of_cqes,
1505                         pr->recv_cq->attr.act_nr_of_cqes);
1506
1507         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1508         if (!init_attr) {
1509                 ret = -ENOMEM;
1510                 pr_err("no mem for ehea_qp_init_attr\n");
1511                 goto out_free;
1512         }
1513
1514         init_attr->low_lat_rq1 = 1;
1515         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1516         init_attr->rq_count = 3;
1517         init_attr->qp_token = queue_token;
1518         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1519         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1520         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1521         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1522         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1523         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1524         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1525         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1526         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1527         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1528         init_attr->port_nr = port->logical_port_id;
1529         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1530         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1531         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1532
1533         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1534         if (!pr->qp) {
1535                 pr_err("create_qp failed\n");
1536                 ret = -EIO;
1537                 goto out_free;
1538         }
1539
1540         if (netif_msg_ifup(port))
1541                 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",
1542                         init_attr->qp_nr,
1543                         init_attr->act_nr_send_wqes,
1544                         init_attr->act_nr_rwqes_rq1,
1545                         init_attr->act_nr_rwqes_rq2,
1546                         init_attr->act_nr_rwqes_rq3);
1547
1548         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1549
1550         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1551         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1552         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1553         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1554         if (ret)
1555                 goto out_free;
1556
1557         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1558         if (ehea_gen_smrs(pr) != 0) {
1559                 ret = -EIO;
1560                 goto out_free;
1561         }
1562
1563         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1564
1565         kfree(init_attr);
1566
1567         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1568
1569         ret = 0;
1570         goto out;
1571
1572 out_free:
1573         kfree(init_attr);
1574         vfree(pr->sq_skba.arr);
1575         vfree(pr->rq1_skba.arr);
1576         vfree(pr->rq2_skba.arr);
1577         vfree(pr->rq3_skba.arr);
1578         ehea_destroy_qp(pr->qp);
1579         ehea_destroy_cq(pr->send_cq);
1580         ehea_destroy_cq(pr->recv_cq);
1581         ehea_destroy_eq(pr->eq);
1582 out:
1583         return ret;
1584 }
1585
1586 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1587 {
1588         int ret, i;
1589
1590         if (pr->qp)
1591                 netif_napi_del(&pr->napi);
1592
1593         ret = ehea_destroy_qp(pr->qp);
1594
1595         if (!ret) {
1596                 ehea_destroy_cq(pr->send_cq);
1597                 ehea_destroy_cq(pr->recv_cq);
1598                 ehea_destroy_eq(pr->eq);
1599
1600                 for (i = 0; i < pr->rq1_skba.len; i++)
1601                         if (pr->rq1_skba.arr[i])
1602                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1603
1604                 for (i = 0; i < pr->rq2_skba.len; i++)
1605                         if (pr->rq2_skba.arr[i])
1606                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1607
1608                 for (i = 0; i < pr->rq3_skba.len; i++)
1609                         if (pr->rq3_skba.arr[i])
1610                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1611
1612                 for (i = 0; i < pr->sq_skba.len; i++)
1613                         if (pr->sq_skba.arr[i])
1614                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1615
1616                 vfree(pr->rq1_skba.arr);
1617                 vfree(pr->rq2_skba.arr);
1618                 vfree(pr->rq3_skba.arr);
1619                 vfree(pr->sq_skba.arr);
1620                 ret = ehea_rem_smrs(pr);
1621         }
1622         return ret;
1623 }
1624
1625 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1626                                   u32 lkey)
1627 {
1628         int skb_data_size = skb_headlen(skb);
1629         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1630         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1631         unsigned int immediate_len = SWQE2_MAX_IMM;
1632
1633         swqe->descriptors = 0;
1634
1635         if (skb_is_gso(skb)) {
1636                 swqe->tx_control |= EHEA_SWQE_TSO;
1637                 swqe->mss = skb_shinfo(skb)->gso_size;
1638                 /*
1639                  * For TSO packets we only copy the headers into the
1640                  * immediate area.
1641                  */
1642                 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1643         }
1644
1645         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1646                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1647                 swqe->immediate_data_length = immediate_len;
1648
1649                 if (skb_data_size > immediate_len) {
1650                         sg1entry->l_key = lkey;
1651                         sg1entry->len = skb_data_size - immediate_len;
1652                         sg1entry->vaddr =
1653                                 ehea_map_vaddr(skb->data + immediate_len);
1654                         swqe->descriptors++;
1655                 }
1656         } else {
1657                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1658                 swqe->immediate_data_length = skb_data_size;
1659         }
1660 }
1661
1662 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1663                                     struct ehea_swqe *swqe, u32 lkey)
1664 {
1665         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1666         skb_frag_t *frag;
1667         int nfrags, sg1entry_contains_frag_data, i;
1668
1669         nfrags = skb_shinfo(skb)->nr_frags;
1670         sg1entry = &swqe->u.immdata_desc.sg_entry;
1671         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1672         sg1entry_contains_frag_data = 0;
1673
1674         write_swqe2_immediate(skb, swqe, lkey);
1675
1676         /* write descriptors */
1677         if (nfrags > 0) {
1678                 if (swqe->descriptors == 0) {
1679                         /* sg1entry not yet used */
1680                         frag = &skb_shinfo(skb)->frags[0];
1681
1682                         /* copy sg1entry data */
1683                         sg1entry->l_key = lkey;
1684                         sg1entry->len = skb_frag_size(frag);
1685                         sg1entry->vaddr =
1686                                 ehea_map_vaddr(skb_frag_address(frag));
1687                         swqe->descriptors++;
1688                         sg1entry_contains_frag_data = 1;
1689                 }
1690
1691                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1692
1693                         frag = &skb_shinfo(skb)->frags[i];
1694                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1695
1696                         sgentry->l_key = lkey;
1697                         sgentry->len = skb_frag_size(frag);
1698                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1699                         swqe->descriptors++;
1700                 }
1701         }
1702 }
1703
1704 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1705 {
1706         int ret = 0;
1707         u64 hret;
1708         u8 reg_type;
1709
1710         /* De/Register untagged packets */
1711         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1712         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1713                                      port->logical_port_id,
1714                                      reg_type, port->mac_addr, 0, hcallid);
1715         if (hret != H_SUCCESS) {
1716                 pr_err("%sregistering bc address failed (tagged)\n",
1717                        hcallid == H_REG_BCMC ? "" : "de");
1718                 ret = -EIO;
1719                 goto out_herr;
1720         }
1721
1722         /* De/Register VLAN packets */
1723         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1724         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1725                                      port->logical_port_id,
1726                                      reg_type, port->mac_addr, 0, hcallid);
1727         if (hret != H_SUCCESS) {
1728                 pr_err("%sregistering bc address failed (vlan)\n",
1729                        hcallid == H_REG_BCMC ? "" : "de");
1730                 ret = -EIO;
1731         }
1732 out_herr:
1733         return ret;
1734 }
1735
1736 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1737 {
1738         struct ehea_port *port = netdev_priv(dev);
1739         struct sockaddr *mac_addr = sa;
1740         struct hcp_ehea_port_cb0 *cb0;
1741         int ret;
1742         u64 hret;
1743
1744         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1745                 ret = -EADDRNOTAVAIL;
1746                 goto out;
1747         }
1748
1749         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1750         if (!cb0) {
1751                 pr_err("no mem for cb0\n");
1752                 ret = -ENOMEM;
1753                 goto out;
1754         }
1755
1756         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1757
1758         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1759
1760         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1761                                        port->logical_port_id, H_PORT_CB0,
1762                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1763         if (hret != H_SUCCESS) {
1764                 ret = -EIO;
1765                 goto out_free;
1766         }
1767
1768         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1769
1770         /* Deregister old MAC in pHYP */
1771         if (port->state == EHEA_PORT_UP) {
1772                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1773                 if (ret)
1774                         goto out_upregs;
1775         }
1776
1777         port->mac_addr = cb0->port_mac_addr << 16;
1778
1779         /* Register new MAC in pHYP */
1780         if (port->state == EHEA_PORT_UP) {
1781                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1782                 if (ret)
1783                         goto out_upregs;
1784         }
1785
1786         ret = 0;
1787
1788 out_upregs:
1789         ehea_update_bcmc_registrations();
1790 out_free:
1791         free_page((unsigned long)cb0);
1792 out:
1793         return ret;
1794 }
1795
1796 static void ehea_promiscuous_error(u64 hret, int enable)
1797 {
1798         if (hret == H_AUTHORITY)
1799                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1800                         enable == 1 ? "en" : "dis");
1801         else
1802                 pr_err("failed %sabling promiscuous mode\n",
1803                        enable == 1 ? "en" : "dis");
1804 }
1805
1806 static void ehea_promiscuous(struct net_device *dev, int enable)
1807 {
1808         struct ehea_port *port = netdev_priv(dev);
1809         struct hcp_ehea_port_cb7 *cb7;
1810         u64 hret;
1811
1812         if (enable == port->promisc)
1813                 return;
1814
1815         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1816         if (!cb7) {
1817                 pr_err("no mem for cb7\n");
1818                 goto out;
1819         }
1820
1821         /* Modify Pxs_DUCQPN in CB7 */
1822         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1823
1824         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1825                                        port->logical_port_id,
1826                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1827         if (hret) {
1828                 ehea_promiscuous_error(hret, enable);
1829                 goto out;
1830         }
1831
1832         port->promisc = enable;
1833 out:
1834         free_page((unsigned long)cb7);
1835 }
1836
1837 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1838                                      u32 hcallid)
1839 {
1840         u64 hret;
1841         u8 reg_type;
1842
1843         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1844         if (mc_mac_addr == 0)
1845                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1846
1847         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1848                                      port->logical_port_id,
1849                                      reg_type, mc_mac_addr, 0, hcallid);
1850         if (hret)
1851                 goto out;
1852
1853         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1854         if (mc_mac_addr == 0)
1855                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1856
1857         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1858                                      port->logical_port_id,
1859                                      reg_type, mc_mac_addr, 0, hcallid);
1860 out:
1861         return hret;
1862 }
1863
1864 static int ehea_drop_multicast_list(struct net_device *dev)
1865 {
1866         struct ehea_port *port = netdev_priv(dev);
1867         struct ehea_mc_list *mc_entry = port->mc_list;
1868         struct list_head *pos;
1869         struct list_head *temp;
1870         int ret = 0;
1871         u64 hret;
1872
1873         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1874                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1875
1876                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1877                                                  H_DEREG_BCMC);
1878                 if (hret) {
1879                         pr_err("failed deregistering mcast MAC\n");
1880                         ret = -EIO;
1881                 }
1882
1883                 list_del(pos);
1884                 kfree(mc_entry);
1885         }
1886         return ret;
1887 }
1888
1889 static void ehea_allmulti(struct net_device *dev, int enable)
1890 {
1891         struct ehea_port *port = netdev_priv(dev);
1892         u64 hret;
1893
1894         if (!port->allmulti) {
1895                 if (enable) {
1896                         /* Enable ALLMULTI */
1897                         ehea_drop_multicast_list(dev);
1898                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1899                         if (!hret)
1900                                 port->allmulti = 1;
1901                         else
1902                                 netdev_err(dev,
1903                                            "failed enabling IFF_ALLMULTI\n");
1904                 }
1905         } else {
1906                 if (!enable) {
1907                         /* Disable ALLMULTI */
1908                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1909                         if (!hret)
1910                                 port->allmulti = 0;
1911                         else
1912                                 netdev_err(dev,
1913                                            "failed disabling IFF_ALLMULTI\n");
1914                 }
1915         }
1916 }
1917
1918 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1919 {
1920         struct ehea_mc_list *ehea_mcl_entry;
1921         u64 hret;
1922
1923         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1924         if (!ehea_mcl_entry) {
1925                 pr_err("no mem for mcl_entry\n");
1926                 return;
1927         }
1928
1929         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1930
1931         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1932
1933         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1934                                          H_REG_BCMC);
1935         if (!hret)
1936                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1937         else {
1938                 pr_err("failed registering mcast MAC\n");
1939                 kfree(ehea_mcl_entry);
1940         }
1941 }
1942
1943 static void ehea_set_multicast_list(struct net_device *dev)
1944 {
1945         struct ehea_port *port = netdev_priv(dev);
1946         struct netdev_hw_addr *ha;
1947         int ret;
1948
1949         ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1950
1951         if (dev->flags & IFF_ALLMULTI) {
1952                 ehea_allmulti(dev, 1);
1953                 goto out;
1954         }
1955         ehea_allmulti(dev, 0);
1956
1957         if (!netdev_mc_empty(dev)) {
1958                 ret = ehea_drop_multicast_list(dev);
1959                 if (ret) {
1960                         /* Dropping the current multicast list failed.
1961                          * Enabling ALL_MULTI is the best we can do.
1962                          */
1963                         ehea_allmulti(dev, 1);
1964                 }
1965
1966                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1967                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1968                                 port->adapter->max_mc_mac);
1969                         goto out;
1970                 }
1971
1972                 netdev_for_each_mc_addr(ha, dev)
1973                         ehea_add_multicast_entry(port, ha->addr);
1974
1975         }
1976 out:
1977         ehea_update_bcmc_registrations();
1978 }
1979
1980 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1981 {
1982         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1983                 return -EINVAL;
1984         dev->mtu = new_mtu;
1985         return 0;
1986 }
1987
1988 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1989 {
1990         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1991
1992         if (skb->protocol != htons(ETH_P_IP))
1993                 return;
1994
1995         if (skb->ip_summed == CHECKSUM_PARTIAL)
1996                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1997
1998         swqe->ip_start = skb_network_offset(skb);
1999         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
2000
2001         switch (ip_hdr(skb)->protocol) {
2002         case IPPROTO_UDP:
2003                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2004                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2005
2006                 swqe->tcp_offset = swqe->ip_end + 1 +
2007                                    offsetof(struct udphdr, check);
2008                 break;
2009
2010         case IPPROTO_TCP:
2011                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2012                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2013
2014                 swqe->tcp_offset = swqe->ip_end + 1 +
2015                                    offsetof(struct tcphdr, check);
2016                 break;
2017         }
2018 }
2019
2020 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2021                        struct ehea_swqe *swqe, u32 lkey)
2022 {
2023         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2024
2025         xmit_common(skb, swqe);
2026
2027         write_swqe2_data(skb, dev, swqe, lkey);
2028 }
2029
2030 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2031                        struct ehea_swqe *swqe)
2032 {
2033         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2034
2035         xmit_common(skb, swqe);
2036
2037         if (!skb->data_len)
2038                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2039         else
2040                 skb_copy_bits(skb, 0, imm_data, skb->len);
2041
2042         swqe->immediate_data_length = skb->len;
2043         dev_kfree_skb(skb);
2044 }
2045
2046 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2047 {
2048         struct ehea_port *port = netdev_priv(dev);
2049         struct ehea_swqe *swqe;
2050         u32 lkey;
2051         int swqe_index;
2052         struct ehea_port_res *pr;
2053         struct netdev_queue *txq;
2054
2055         pr = &port->port_res[skb_get_queue_mapping(skb)];
2056         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2057
2058         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2059         memset(swqe, 0, SWQE_HEADER_SIZE);
2060         atomic_dec(&pr->swqe_avail);
2061
2062         if (vlan_tx_tag_present(skb)) {
2063                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2064                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2065         }
2066
2067         pr->tx_packets++;
2068         pr->tx_bytes += skb->len;
2069
2070         if (skb->len <= SWQE3_MAX_IMM) {
2071                 u32 sig_iv = port->sig_comp_iv;
2072                 u32 swqe_num = pr->swqe_id_counter;
2073                 ehea_xmit3(skb, dev, swqe);
2074                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2075                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2076                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2077                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2078                                                       sig_iv);
2079                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2080                         pr->swqe_ll_count = 0;
2081                 } else
2082                         pr->swqe_ll_count += 1;
2083         } else {
2084                 swqe->wr_id =
2085                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2086                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2087                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2088                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2089                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2090
2091                 pr->sq_skba.index++;
2092                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2093
2094                 lkey = pr->send_mr.lkey;
2095                 ehea_xmit2(skb, dev, swqe, lkey);
2096                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2097         }
2098         pr->swqe_id_counter += 1;
2099
2100         netif_info(port, tx_queued, dev,
2101                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2102         if (netif_msg_tx_queued(port))
2103                 ehea_dump(swqe, 512, "swqe");
2104
2105         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2106                 netif_tx_stop_queue(txq);
2107                 swqe->tx_control |= EHEA_SWQE_PURGE;
2108         }
2109
2110         ehea_post_swqe(pr->qp, swqe);
2111
2112         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2113                 pr->p_stats.queue_stopped++;
2114                 netif_tx_stop_queue(txq);
2115         }
2116
2117         return NETDEV_TX_OK;
2118 }
2119
2120 static int ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2121 {
2122         struct ehea_port *port = netdev_priv(dev);
2123         struct ehea_adapter *adapter = port->adapter;
2124         struct hcp_ehea_port_cb1 *cb1;
2125         int index;
2126         u64 hret;
2127         int err = 0;
2128
2129         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2130         if (!cb1) {
2131                 pr_err("no mem for cb1\n");
2132                 err = -ENOMEM;
2133                 goto out;
2134         }
2135
2136         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2137                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2138         if (hret != H_SUCCESS) {
2139                 pr_err("query_ehea_port failed\n");
2140                 err = -EINVAL;
2141                 goto out;
2142         }
2143
2144         index = (vid / 64);
2145         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2146
2147         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2148                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2149         if (hret != H_SUCCESS) {
2150                 pr_err("modify_ehea_port failed\n");
2151                 err = -EINVAL;
2152         }
2153 out:
2154         free_page((unsigned long)cb1);
2155         return err;
2156 }
2157
2158 static int ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2159 {
2160         struct ehea_port *port = netdev_priv(dev);
2161         struct ehea_adapter *adapter = port->adapter;
2162         struct hcp_ehea_port_cb1 *cb1;
2163         int index;
2164         u64 hret;
2165         int err = 0;
2166
2167         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2168         if (!cb1) {
2169                 pr_err("no mem for cb1\n");
2170                 err = -ENOMEM;
2171                 goto out;
2172         }
2173
2174         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2175                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2176         if (hret != H_SUCCESS) {
2177                 pr_err("query_ehea_port failed\n");
2178                 err = -EINVAL;
2179                 goto out;
2180         }
2181
2182         index = (vid / 64);
2183         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2184
2185         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2186                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2187         if (hret != H_SUCCESS) {
2188                 pr_err("modify_ehea_port failed\n");
2189                 err = -EINVAL;
2190         }
2191 out:
2192         free_page((unsigned long)cb1);
2193         return err;
2194 }
2195
2196 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2197 {
2198         int ret = -EIO;
2199         u64 hret;
2200         u16 dummy16 = 0;
2201         u64 dummy64 = 0;
2202         struct hcp_modify_qp_cb0 *cb0;
2203
2204         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2205         if (!cb0) {
2206                 ret = -ENOMEM;
2207                 goto out;
2208         }
2209
2210         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2211                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2212         if (hret != H_SUCCESS) {
2213                 pr_err("query_ehea_qp failed (1)\n");
2214                 goto out;
2215         }
2216
2217         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2218         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2219                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2220                                      &dummy64, &dummy64, &dummy16, &dummy16);
2221         if (hret != H_SUCCESS) {
2222                 pr_err("modify_ehea_qp failed (1)\n");
2223                 goto out;
2224         }
2225
2226         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2227                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2228         if (hret != H_SUCCESS) {
2229                 pr_err("query_ehea_qp failed (2)\n");
2230                 goto out;
2231         }
2232
2233         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2234         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2235                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2236                                      &dummy64, &dummy64, &dummy16, &dummy16);
2237         if (hret != H_SUCCESS) {
2238                 pr_err("modify_ehea_qp failed (2)\n");
2239                 goto out;
2240         }
2241
2242         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2243                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2244         if (hret != H_SUCCESS) {
2245                 pr_err("query_ehea_qp failed (3)\n");
2246                 goto out;
2247         }
2248
2249         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2250         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2251                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2252                                      &dummy64, &dummy64, &dummy16, &dummy16);
2253         if (hret != H_SUCCESS) {
2254                 pr_err("modify_ehea_qp failed (3)\n");
2255                 goto out;
2256         }
2257
2258         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2259                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2260         if (hret != H_SUCCESS) {
2261                 pr_err("query_ehea_qp failed (4)\n");
2262                 goto out;
2263         }
2264
2265         ret = 0;
2266 out:
2267         free_page((unsigned long)cb0);
2268         return ret;
2269 }
2270
2271 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2272 {
2273         int ret, i;
2274         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2275         enum ehea_eq_type eq_type = EHEA_EQ;
2276
2277         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2278                                    EHEA_MAX_ENTRIES_EQ, 1);
2279         if (!port->qp_eq) {
2280                 ret = -EINVAL;
2281                 pr_err("ehea_create_eq failed (qp_eq)\n");
2282                 goto out_kill_eq;
2283         }
2284
2285         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2286         pr_cfg.max_entries_scq = sq_entries * 2;
2287         pr_cfg.max_entries_sq = sq_entries;
2288         pr_cfg.max_entries_rq1 = rq1_entries;
2289         pr_cfg.max_entries_rq2 = rq2_entries;
2290         pr_cfg.max_entries_rq3 = rq3_entries;
2291
2292         pr_cfg_small_rx.max_entries_rcq = 1;
2293         pr_cfg_small_rx.max_entries_scq = sq_entries;
2294         pr_cfg_small_rx.max_entries_sq = sq_entries;
2295         pr_cfg_small_rx.max_entries_rq1 = 1;
2296         pr_cfg_small_rx.max_entries_rq2 = 1;
2297         pr_cfg_small_rx.max_entries_rq3 = 1;
2298
2299         for (i = 0; i < def_qps; i++) {
2300                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2301                 if (ret)
2302                         goto out_clean_pr;
2303         }
2304         for (i = def_qps; i < def_qps; i++) {
2305                 ret = ehea_init_port_res(port, &port->port_res[i],
2306                                          &pr_cfg_small_rx, i);
2307                 if (ret)
2308                         goto out_clean_pr;
2309         }
2310
2311         return 0;
2312
2313 out_clean_pr:
2314         while (--i >= 0)
2315                 ehea_clean_portres(port, &port->port_res[i]);
2316
2317 out_kill_eq:
2318         ehea_destroy_eq(port->qp_eq);
2319         return ret;
2320 }
2321
2322 static int ehea_clean_all_portres(struct ehea_port *port)
2323 {
2324         int ret = 0;
2325         int i;
2326
2327         for (i = 0; i < port->num_def_qps; i++)
2328                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2329
2330         ret |= ehea_destroy_eq(port->qp_eq);
2331
2332         return ret;
2333 }
2334
2335 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2336 {
2337         if (adapter->active_ports)
2338                 return;
2339
2340         ehea_rem_mr(&adapter->mr);
2341 }
2342
2343 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2344 {
2345         if (adapter->active_ports)
2346                 return 0;
2347
2348         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2349 }
2350
2351 static int ehea_up(struct net_device *dev)
2352 {
2353         int ret, i;
2354         struct ehea_port *port = netdev_priv(dev);
2355
2356         if (port->state == EHEA_PORT_UP)
2357                 return 0;
2358
2359         ret = ehea_port_res_setup(port, port->num_def_qps);
2360         if (ret) {
2361                 netdev_err(dev, "port_res_failed\n");
2362                 goto out;
2363         }
2364
2365         /* Set default QP for this port */
2366         ret = ehea_configure_port(port);
2367         if (ret) {
2368                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2369                 goto out_clean_pr;
2370         }
2371
2372         ret = ehea_reg_interrupts(dev);
2373         if (ret) {
2374                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2375                 goto out_clean_pr;
2376         }
2377
2378         for (i = 0; i < port->num_def_qps; i++) {
2379                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2380                 if (ret) {
2381                         netdev_err(dev, "activate_qp failed\n");
2382                         goto out_free_irqs;
2383                 }
2384         }
2385
2386         for (i = 0; i < port->num_def_qps; i++) {
2387                 ret = ehea_fill_port_res(&port->port_res[i]);
2388                 if (ret) {
2389                         netdev_err(dev, "out_free_irqs\n");
2390                         goto out_free_irqs;
2391                 }
2392         }
2393
2394         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2395         if (ret) {
2396                 ret = -EIO;
2397                 goto out_free_irqs;
2398         }
2399
2400         port->state = EHEA_PORT_UP;
2401
2402         ret = 0;
2403         goto out;
2404
2405 out_free_irqs:
2406         ehea_free_interrupts(dev);
2407
2408 out_clean_pr:
2409         ehea_clean_all_portres(port);
2410 out:
2411         if (ret)
2412                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2413
2414         ehea_update_bcmc_registrations();
2415         ehea_update_firmware_handles();
2416
2417         return ret;
2418 }
2419
2420 static void port_napi_disable(struct ehea_port *port)
2421 {
2422         int i;
2423
2424         for (i = 0; i < port->num_def_qps; i++)
2425                 napi_disable(&port->port_res[i].napi);
2426 }
2427
2428 static void port_napi_enable(struct ehea_port *port)
2429 {
2430         int i;
2431
2432         for (i = 0; i < port->num_def_qps; i++)
2433                 napi_enable(&port->port_res[i].napi);
2434 }
2435
2436 static int ehea_open(struct net_device *dev)
2437 {
2438         int ret;
2439         struct ehea_port *port = netdev_priv(dev);
2440
2441         mutex_lock(&port->port_lock);
2442
2443         netif_info(port, ifup, dev, "enabling port\n");
2444
2445         ret = ehea_up(dev);
2446         if (!ret) {
2447                 port_napi_enable(port);
2448                 netif_tx_start_all_queues(dev);
2449         }
2450
2451         mutex_unlock(&port->port_lock);
2452         schedule_delayed_work(&port->stats_work,
2453                               round_jiffies_relative(msecs_to_jiffies(1000)));
2454
2455         return ret;
2456 }
2457
2458 static int ehea_down(struct net_device *dev)
2459 {
2460         int ret;
2461         struct ehea_port *port = netdev_priv(dev);
2462
2463         if (port->state == EHEA_PORT_DOWN)
2464                 return 0;
2465
2466         ehea_drop_multicast_list(dev);
2467         ehea_allmulti(dev, 0);
2468         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2469
2470         ehea_free_interrupts(dev);
2471
2472         port->state = EHEA_PORT_DOWN;
2473
2474         ehea_update_bcmc_registrations();
2475
2476         ret = ehea_clean_all_portres(port);
2477         if (ret)
2478                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2479
2480         ehea_update_firmware_handles();
2481
2482         return ret;
2483 }
2484
2485 static int ehea_stop(struct net_device *dev)
2486 {
2487         int ret;
2488         struct ehea_port *port = netdev_priv(dev);
2489
2490         netif_info(port, ifdown, dev, "disabling port\n");
2491
2492         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2493         cancel_work_sync(&port->reset_task);
2494         cancel_delayed_work_sync(&port->stats_work);
2495         mutex_lock(&port->port_lock);
2496         netif_tx_stop_all_queues(dev);
2497         port_napi_disable(port);
2498         ret = ehea_down(dev);
2499         mutex_unlock(&port->port_lock);
2500         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2501         return ret;
2502 }
2503
2504 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2505 {
2506         struct ehea_qp qp = *orig_qp;
2507         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2508         struct ehea_swqe *swqe;
2509         int wqe_index;
2510         int i;
2511
2512         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2513                 swqe = ehea_get_swqe(&qp, &wqe_index);
2514                 swqe->tx_control |= EHEA_SWQE_PURGE;
2515         }
2516 }
2517
2518 static void ehea_flush_sq(struct ehea_port *port)
2519 {
2520         int i;
2521
2522         for (i = 0; i < port->num_def_qps; i++) {
2523                 struct ehea_port_res *pr = &port->port_res[i];
2524                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2525                 int ret;
2526
2527                 ret = wait_event_timeout(port->swqe_avail_wq,
2528                          atomic_read(&pr->swqe_avail) >= swqe_max,
2529                          msecs_to_jiffies(100));
2530
2531                 if (!ret) {
2532                         pr_err("WARNING: sq not flushed completely\n");
2533                         break;
2534                 }
2535         }
2536 }
2537
2538 static int ehea_stop_qps(struct net_device *dev)
2539 {
2540         struct ehea_port *port = netdev_priv(dev);
2541         struct ehea_adapter *adapter = port->adapter;
2542         struct hcp_modify_qp_cb0 *cb0;
2543         int ret = -EIO;
2544         int dret;
2545         int i;
2546         u64 hret;
2547         u64 dummy64 = 0;
2548         u16 dummy16 = 0;
2549
2550         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2551         if (!cb0) {
2552                 ret = -ENOMEM;
2553                 goto out;
2554         }
2555
2556         for (i = 0; i < (port->num_def_qps); i++) {
2557                 struct ehea_port_res *pr =  &port->port_res[i];
2558                 struct ehea_qp *qp = pr->qp;
2559
2560                 /* Purge send queue */
2561                 ehea_purge_sq(qp);
2562
2563                 /* Disable queue pair */
2564                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2565                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2566                                             cb0);
2567                 if (hret != H_SUCCESS) {
2568                         pr_err("query_ehea_qp failed (1)\n");
2569                         goto out;
2570                 }
2571
2572                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2573                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2574
2575                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2576                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2577                                                             1), cb0, &dummy64,
2578                                              &dummy64, &dummy16, &dummy16);
2579                 if (hret != H_SUCCESS) {
2580                         pr_err("modify_ehea_qp failed (1)\n");
2581                         goto out;
2582                 }
2583
2584                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2585                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2586                                             cb0);
2587                 if (hret != H_SUCCESS) {
2588                         pr_err("query_ehea_qp failed (2)\n");
2589                         goto out;
2590                 }
2591
2592                 /* deregister shared memory regions */
2593                 dret = ehea_rem_smrs(pr);
2594                 if (dret) {
2595                         pr_err("unreg shared memory region failed\n");
2596                         goto out;
2597                 }
2598         }
2599
2600         ret = 0;
2601 out:
2602         free_page((unsigned long)cb0);
2603
2604         return ret;
2605 }
2606
2607 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2608 {
2609         struct ehea_qp qp = *orig_qp;
2610         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2611         struct ehea_rwqe *rwqe;
2612         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2613         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2614         struct sk_buff *skb;
2615         u32 lkey = pr->recv_mr.lkey;
2616
2617
2618         int i;
2619         int index;
2620
2621         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2622                 rwqe = ehea_get_next_rwqe(&qp, 2);
2623                 rwqe->sg_list[0].l_key = lkey;
2624                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2625                 skb = skba_rq2[index];
2626                 if (skb)
2627                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2628         }
2629
2630         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2631                 rwqe = ehea_get_next_rwqe(&qp, 3);
2632                 rwqe->sg_list[0].l_key = lkey;
2633                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2634                 skb = skba_rq3[index];
2635                 if (skb)
2636                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2637         }
2638 }
2639
2640 static int ehea_restart_qps(struct net_device *dev)
2641 {
2642         struct ehea_port *port = netdev_priv(dev);
2643         struct ehea_adapter *adapter = port->adapter;
2644         int ret = 0;
2645         int i;
2646
2647         struct hcp_modify_qp_cb0 *cb0;
2648         u64 hret;
2649         u64 dummy64 = 0;
2650         u16 dummy16 = 0;
2651
2652         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2653         if (!cb0) {
2654                 ret = -ENOMEM;
2655                 goto out;
2656         }
2657
2658         for (i = 0; i < (port->num_def_qps); i++) {
2659                 struct ehea_port_res *pr =  &port->port_res[i];
2660                 struct ehea_qp *qp = pr->qp;
2661
2662                 ret = ehea_gen_smrs(pr);
2663                 if (ret) {
2664                         netdev_err(dev, "creation of shared memory regions failed\n");
2665                         goto out;
2666                 }
2667
2668                 ehea_update_rqs(qp, pr);
2669
2670                 /* Enable queue pair */
2671                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2672                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2673                                             cb0);
2674                 if (hret != H_SUCCESS) {
2675                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2676                         goto out;
2677                 }
2678
2679                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2680                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2681
2682                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2683                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2684                                                             1), cb0, &dummy64,
2685                                              &dummy64, &dummy16, &dummy16);
2686                 if (hret != H_SUCCESS) {
2687                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2688                         goto out;
2689                 }
2690
2691                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2692                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2693                                             cb0);
2694                 if (hret != H_SUCCESS) {
2695                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2696                         goto out;
2697                 }
2698
2699                 /* refill entire queue */
2700                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2701                 ehea_refill_rq2(pr, 0);
2702                 ehea_refill_rq3(pr, 0);
2703         }
2704 out:
2705         free_page((unsigned long)cb0);
2706
2707         return ret;
2708 }
2709
2710 static void ehea_reset_port(struct work_struct *work)
2711 {
2712         int ret;
2713         struct ehea_port *port =
2714                 container_of(work, struct ehea_port, reset_task);
2715         struct net_device *dev = port->netdev;
2716
2717         mutex_lock(&dlpar_mem_lock);
2718         port->resets++;
2719         mutex_lock(&port->port_lock);
2720         netif_tx_disable(dev);
2721
2722         port_napi_disable(port);
2723
2724         ehea_down(dev);
2725
2726         ret = ehea_up(dev);
2727         if (ret)
2728                 goto out;
2729
2730         ehea_set_multicast_list(dev);
2731
2732         netif_info(port, timer, dev, "reset successful\n");
2733
2734         port_napi_enable(port);
2735
2736         netif_tx_wake_all_queues(dev);
2737 out:
2738         mutex_unlock(&port->port_lock);
2739         mutex_unlock(&dlpar_mem_lock);
2740 }
2741
2742 static void ehea_rereg_mrs(void)
2743 {
2744         int ret, i;
2745         struct ehea_adapter *adapter;
2746
2747         pr_info("LPAR memory changed - re-initializing driver\n");
2748
2749         list_for_each_entry(adapter, &adapter_list, list)
2750                 if (adapter->active_ports) {
2751                         /* Shutdown all ports */
2752                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2753                                 struct ehea_port *port = adapter->port[i];
2754                                 struct net_device *dev;
2755
2756                                 if (!port)
2757                                         continue;
2758
2759                                 dev = port->netdev;
2760
2761                                 if (dev->flags & IFF_UP) {
2762                                         mutex_lock(&port->port_lock);
2763                                         netif_tx_disable(dev);
2764                                         ehea_flush_sq(port);
2765                                         ret = ehea_stop_qps(dev);
2766                                         if (ret) {
2767                                                 mutex_unlock(&port->port_lock);
2768                                                 goto out;
2769                                         }
2770                                         port_napi_disable(port);
2771                                         mutex_unlock(&port->port_lock);
2772                                 }
2773                                 reset_sq_restart_flag(port);
2774                         }
2775
2776                         /* Unregister old memory region */
2777                         ret = ehea_rem_mr(&adapter->mr);
2778                         if (ret) {
2779                                 pr_err("unregister MR failed - driver inoperable!\n");
2780                                 goto out;
2781                         }
2782                 }
2783
2784         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2785
2786         list_for_each_entry(adapter, &adapter_list, list)
2787                 if (adapter->active_ports) {
2788                         /* Register new memory region */
2789                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2790                         if (ret) {
2791                                 pr_err("register MR failed - driver inoperable!\n");
2792                                 goto out;
2793                         }
2794
2795                         /* Restart all ports */
2796                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2797                                 struct ehea_port *port = adapter->port[i];
2798
2799                                 if (port) {
2800                                         struct net_device *dev = port->netdev;
2801
2802                                         if (dev->flags & IFF_UP) {
2803                                                 mutex_lock(&port->port_lock);
2804                                                 ret = ehea_restart_qps(dev);
2805                                                 if (!ret) {
2806                                                         check_sqs(port);
2807                                                         port_napi_enable(port);
2808                                                         netif_tx_wake_all_queues(dev);
2809                                                 } else {
2810                                                         netdev_err(dev, "Unable to restart QPS\n");
2811                                                 }
2812                                                 mutex_unlock(&port->port_lock);
2813                                         }
2814                                 }
2815                         }
2816                 }
2817         pr_info("re-initializing driver complete\n");
2818 out:
2819         return;
2820 }
2821
2822 static void ehea_tx_watchdog(struct net_device *dev)
2823 {
2824         struct ehea_port *port = netdev_priv(dev);
2825
2826         if (netif_carrier_ok(dev) &&
2827             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2828                 ehea_schedule_port_reset(port);
2829 }
2830
2831 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2832 {
2833         struct hcp_query_ehea *cb;
2834         u64 hret;
2835         int ret;
2836
2837         cb = (void *)get_zeroed_page(GFP_KERNEL);
2838         if (!cb) {
2839                 ret = -ENOMEM;
2840                 goto out;
2841         }
2842
2843         hret = ehea_h_query_ehea(adapter->handle, cb);
2844
2845         if (hret != H_SUCCESS) {
2846                 ret = -EIO;
2847                 goto out_herr;
2848         }
2849
2850         adapter->max_mc_mac = cb->max_mc_mac - 1;
2851         ret = 0;
2852
2853 out_herr:
2854         free_page((unsigned long)cb);
2855 out:
2856         return ret;
2857 }
2858
2859 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2860 {
2861         struct hcp_ehea_port_cb4 *cb4;
2862         u64 hret;
2863         int ret = 0;
2864
2865         *jumbo = 0;
2866
2867         /* (Try to) enable *jumbo frames */
2868         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2869         if (!cb4) {
2870                 pr_err("no mem for cb4\n");
2871                 ret = -ENOMEM;
2872                 goto out;
2873         } else {
2874                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2875                                               port->logical_port_id,
2876                                               H_PORT_CB4,
2877                                               H_PORT_CB4_JUMBO, cb4);
2878                 if (hret == H_SUCCESS) {
2879                         if (cb4->jumbo_frame)
2880                                 *jumbo = 1;
2881                         else {
2882                                 cb4->jumbo_frame = 1;
2883                                 hret = ehea_h_modify_ehea_port(port->adapter->
2884                                                                handle,
2885                                                                port->
2886                                                                logical_port_id,
2887                                                                H_PORT_CB4,
2888                                                                H_PORT_CB4_JUMBO,
2889                                                                cb4);
2890                                 if (hret == H_SUCCESS)
2891                                         *jumbo = 1;
2892                         }
2893                 } else
2894                         ret = -EINVAL;
2895
2896                 free_page((unsigned long)cb4);
2897         }
2898 out:
2899         return ret;
2900 }
2901
2902 static ssize_t ehea_show_port_id(struct device *dev,
2903                                  struct device_attribute *attr, char *buf)
2904 {
2905         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2906         return sprintf(buf, "%d", port->logical_port_id);
2907 }
2908
2909 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2910                    NULL);
2911
2912 static void __devinit logical_port_release(struct device *dev)
2913 {
2914         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2915         of_node_put(port->ofdev.dev.of_node);
2916 }
2917
2918 static struct device *ehea_register_port(struct ehea_port *port,
2919                                          struct device_node *dn)
2920 {
2921         int ret;
2922
2923         port->ofdev.dev.of_node = of_node_get(dn);
2924         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2925         port->ofdev.dev.bus = &ibmebus_bus_type;
2926
2927         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2928         port->ofdev.dev.release = logical_port_release;
2929
2930         ret = of_device_register(&port->ofdev);
2931         if (ret) {
2932                 pr_err("failed to register device. ret=%d\n", ret);
2933                 goto out;
2934         }
2935
2936         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2937         if (ret) {
2938                 pr_err("failed to register attributes, ret=%d\n", ret);
2939                 goto out_unreg_of_dev;
2940         }
2941
2942         return &port->ofdev.dev;
2943
2944 out_unreg_of_dev:
2945         of_device_unregister(&port->ofdev);
2946 out:
2947         return NULL;
2948 }
2949
2950 static void ehea_unregister_port(struct ehea_port *port)
2951 {
2952         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2953         of_device_unregister(&port->ofdev);
2954 }
2955
2956 static const struct net_device_ops ehea_netdev_ops = {
2957         .ndo_open               = ehea_open,
2958         .ndo_stop               = ehea_stop,
2959         .ndo_start_xmit         = ehea_start_xmit,
2960 #ifdef CONFIG_NET_POLL_CONTROLLER
2961         .ndo_poll_controller    = ehea_netpoll,
2962 #endif
2963         .ndo_get_stats64        = ehea_get_stats64,
2964         .ndo_set_mac_address    = ehea_set_mac_addr,
2965         .ndo_validate_addr      = eth_validate_addr,
2966         .ndo_set_rx_mode        = ehea_set_multicast_list,
2967         .ndo_change_mtu         = ehea_change_mtu,
2968         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2969         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2970         .ndo_tx_timeout         = ehea_tx_watchdog,
2971 };
2972
2973 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2974                                          u32 logical_port_id,
2975                                          struct device_node *dn)
2976 {
2977         int ret;
2978         struct net_device *dev;
2979         struct ehea_port *port;
2980         struct device *port_dev;
2981         int jumbo;
2982
2983         /* allocate memory for the port structures */
2984         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2985
2986         if (!dev) {
2987                 ret = -ENOMEM;
2988                 goto out_err;
2989         }
2990
2991         port = netdev_priv(dev);
2992
2993         mutex_init(&port->port_lock);
2994         port->state = EHEA_PORT_DOWN;
2995         port->sig_comp_iv = sq_entries / 10;
2996
2997         port->adapter = adapter;
2998         port->netdev = dev;
2999         port->logical_port_id = logical_port_id;
3000
3001         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3002
3003         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3004         if (!port->mc_list) {
3005                 ret = -ENOMEM;
3006                 goto out_free_ethdev;
3007         }
3008
3009         INIT_LIST_HEAD(&port->mc_list->list);
3010
3011         ret = ehea_sense_port_attr(port);
3012         if (ret)
3013                 goto out_free_mc_list;
3014
3015         netif_set_real_num_rx_queues(dev, port->num_def_qps);
3016         netif_set_real_num_tx_queues(dev, port->num_def_qps);
3017
3018         port_dev = ehea_register_port(port, dn);
3019         if (!port_dev)
3020                 goto out_free_mc_list;
3021
3022         SET_NETDEV_DEV(dev, port_dev);
3023
3024         /* initialize net_device structure */
3025         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3026
3027         dev->netdev_ops = &ehea_netdev_ops;
3028         ehea_set_ethtool_ops(dev);
3029
3030         dev->hw_features = NETIF_F_SG | NETIF_F_TSO
3031                       | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3032         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3033                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3034                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3035                       | NETIF_F_RXCSUM;
3036         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3037                         NETIF_F_IP_CSUM;
3038         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3039
3040         INIT_WORK(&port->reset_task, ehea_reset_port);
3041         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3042
3043         init_waitqueue_head(&port->swqe_avail_wq);
3044         init_waitqueue_head(&port->restart_wq);
3045
3046         memset(&port->stats, 0, sizeof(struct net_device_stats));
3047         ret = register_netdev(dev);
3048         if (ret) {
3049                 pr_err("register_netdev failed. ret=%d\n", ret);
3050                 goto out_unreg_port;
3051         }
3052
3053         ret = ehea_get_jumboframe_status(port, &jumbo);
3054         if (ret)
3055                 netdev_err(dev, "failed determining jumbo frame status\n");
3056
3057         netdev_info(dev, "Jumbo frames are %sabled\n",
3058                     jumbo == 1 ? "en" : "dis");
3059
3060         adapter->active_ports++;
3061
3062         return port;
3063
3064 out_unreg_port:
3065         ehea_unregister_port(port);
3066
3067 out_free_mc_list:
3068         kfree(port->mc_list);
3069
3070 out_free_ethdev:
3071         free_netdev(dev);
3072
3073 out_err:
3074         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3075                logical_port_id, ret);
3076         return NULL;
3077 }
3078
3079 static void ehea_shutdown_single_port(struct ehea_port *port)
3080 {
3081         struct ehea_adapter *adapter = port->adapter;
3082
3083         cancel_work_sync(&port->reset_task);
3084         cancel_delayed_work_sync(&port->stats_work);
3085         unregister_netdev(port->netdev);
3086         ehea_unregister_port(port);
3087         kfree(port->mc_list);
3088         free_netdev(port->netdev);
3089         adapter->active_ports--;
3090 }
3091
3092 static int ehea_setup_ports(struct ehea_adapter *adapter)
3093 {
3094         struct device_node *lhea_dn;
3095         struct device_node *eth_dn = NULL;
3096
3097         const u32 *dn_log_port_id;
3098         int i = 0;
3099
3100         lhea_dn = adapter->ofdev->dev.of_node;
3101         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3102
3103                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3104                                                  NULL);
3105                 if (!dn_log_port_id) {
3106                         pr_err("bad device node: eth_dn name=%s\n",
3107                                eth_dn->full_name);
3108                         continue;
3109                 }
3110
3111                 if (ehea_add_adapter_mr(adapter)) {
3112                         pr_err("creating MR failed\n");
3113                         of_node_put(eth_dn);
3114                         return -EIO;
3115                 }
3116
3117                 adapter->port[i] = ehea_setup_single_port(adapter,
3118                                                           *dn_log_port_id,
3119                                                           eth_dn);
3120                 if (adapter->port[i])
3121                         netdev_info(adapter->port[i]->netdev,
3122                                     "logical port id #%d\n", *dn_log_port_id);
3123                 else
3124                         ehea_remove_adapter_mr(adapter);
3125
3126                 i++;
3127         }
3128         return 0;
3129 }
3130
3131 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3132                                            u32 logical_port_id)
3133 {
3134         struct device_node *lhea_dn;
3135         struct device_node *eth_dn = NULL;
3136         const u32 *dn_log_port_id;
3137
3138         lhea_dn = adapter->ofdev->dev.of_node;
3139         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3140
3141                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3142                                                  NULL);
3143                 if (dn_log_port_id)
3144                         if (*dn_log_port_id == logical_port_id)
3145                                 return eth_dn;
3146         }
3147
3148         return NULL;
3149 }
3150
3151 static ssize_t ehea_probe_port(struct device *dev,
3152                                struct device_attribute *attr,
3153                                const char *buf, size_t count)
3154 {
3155         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3156         struct ehea_port *port;
3157         struct device_node *eth_dn = NULL;
3158         int i;
3159
3160         u32 logical_port_id;
3161
3162         sscanf(buf, "%d", &logical_port_id);
3163
3164         port = ehea_get_port(adapter, logical_port_id);
3165
3166         if (port) {
3167                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3168                             logical_port_id);
3169                 return -EINVAL;
3170         }
3171
3172         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3173
3174         if (!eth_dn) {
3175                 pr_info("no logical port with id %d found\n", logical_port_id);
3176                 return -EINVAL;
3177         }
3178
3179         if (ehea_add_adapter_mr(adapter)) {
3180                 pr_err("creating MR failed\n");
3181                 return -EIO;
3182         }
3183
3184         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3185
3186         of_node_put(eth_dn);
3187
3188         if (port) {
3189                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3190                         if (!adapter->port[i]) {
3191                                 adapter->port[i] = port;
3192                                 break;
3193                         }
3194
3195                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3196                             logical_port_id);
3197         } else {
3198                 ehea_remove_adapter_mr(adapter);
3199                 return -EIO;
3200         }
3201
3202         return (ssize_t) count;
3203 }
3204
3205 static ssize_t ehea_remove_port(struct device *dev,
3206                                 struct device_attribute *attr,
3207                                 const char *buf, size_t count)
3208 {
3209         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3210         struct ehea_port *port;
3211         int i;
3212         u32 logical_port_id;
3213
3214         sscanf(buf, "%d", &logical_port_id);
3215
3216         port = ehea_get_port(adapter, logical_port_id);
3217
3218         if (port) {
3219                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3220                             logical_port_id);
3221
3222                 ehea_shutdown_single_port(port);
3223
3224                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3225                         if (adapter->port[i] == port) {
3226                                 adapter->port[i] = NULL;
3227                                 break;
3228                         }
3229         } else {
3230                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3231                        logical_port_id);
3232                 return -EINVAL;
3233         }
3234
3235         ehea_remove_adapter_mr(adapter);
3236
3237         return (ssize_t) count;
3238 }
3239
3240 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3241 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3242
3243 static int ehea_create_device_sysfs(struct platform_device *dev)
3244 {
3245         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3246         if (ret)
3247                 goto out;
3248
3249         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3250 out:
3251         return ret;
3252 }
3253
3254 static void ehea_remove_device_sysfs(struct platform_device *dev)
3255 {
3256         device_remove_file(&dev->dev, &dev_attr_probe_port);
3257         device_remove_file(&dev->dev, &dev_attr_remove_port);
3258 }
3259
3260 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3261                                         const struct of_device_id *id)
3262 {
3263         struct ehea_adapter *adapter;
3264         const u64 *adapter_handle;
3265         int ret;
3266         int i;
3267
3268         if (!dev || !dev->dev.of_node) {
3269                 pr_err("Invalid ibmebus device probed\n");
3270                 return -EINVAL;
3271         }
3272
3273         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3274         if (!adapter) {
3275                 ret = -ENOMEM;
3276                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3277                 goto out;
3278         }
3279
3280         list_add(&adapter->list, &adapter_list);
3281
3282         adapter->ofdev = dev;
3283
3284         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3285                                          NULL);
3286         if (adapter_handle)
3287                 adapter->handle = *adapter_handle;
3288
3289         if (!adapter->handle) {
3290                 dev_err(&dev->dev, "failed getting handle for adapter"
3291                         " '%s'\n", dev->dev.of_node->full_name);
3292                 ret = -ENODEV;
3293                 goto out_free_ad;
3294         }
3295
3296         adapter->pd = EHEA_PD_ID;
3297
3298         dev_set_drvdata(&dev->dev, adapter);
3299
3300
3301         /* initialize adapter and ports */
3302         /* get adapter properties */
3303         ret = ehea_sense_adapter_attr(adapter);
3304         if (ret) {
3305                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3306                 goto out_free_ad;
3307         }
3308
3309         adapter->neq = ehea_create_eq(adapter,
3310                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3311         if (!adapter->neq) {
3312                 ret = -EIO;
3313                 dev_err(&dev->dev, "NEQ creation failed\n");
3314                 goto out_free_ad;
3315         }
3316
3317         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3318                      (unsigned long)adapter);
3319
3320         ret = ehea_create_device_sysfs(dev);
3321         if (ret)
3322                 goto out_kill_eq;
3323
3324         ret = ehea_setup_ports(adapter);
3325         if (ret) {
3326                 dev_err(&dev->dev, "setup_ports failed\n");
3327                 goto out_rem_dev_sysfs;
3328         }
3329
3330         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3331                                   ehea_interrupt_neq, IRQF_DISABLED,
3332                                   "ehea_neq", adapter);
3333         if (ret) {
3334                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3335                 goto out_shutdown_ports;
3336         }
3337
3338         /* Handle any events that might be pending. */
3339         tasklet_hi_schedule(&adapter->neq_tasklet);
3340
3341         ret = 0;
3342         goto out;
3343
3344 out_shutdown_ports:
3345         for (i = 0; i < EHEA_MAX_PORTS; i++)
3346                 if (adapter->port[i]) {
3347                         ehea_shutdown_single_port(adapter->port[i]);
3348                         adapter->port[i] = NULL;
3349                 }
3350
3351 out_rem_dev_sysfs:
3352         ehea_remove_device_sysfs(dev);
3353
3354 out_kill_eq:
3355         ehea_destroy_eq(adapter->neq);
3356
3357 out_free_ad:
3358         list_del(&adapter->list);
3359         kfree(adapter);
3360
3361 out:
3362         ehea_update_firmware_handles();
3363
3364         return ret;
3365 }
3366
3367 static int __devexit ehea_remove(struct platform_device *dev)
3368 {
3369         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3370         int i;
3371
3372         for (i = 0; i < EHEA_MAX_PORTS; i++)
3373                 if (adapter->port[i]) {
3374                         ehea_shutdown_single_port(adapter->port[i]);
3375                         adapter->port[i] = NULL;
3376                 }
3377
3378         ehea_remove_device_sysfs(dev);
3379
3380         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3381         tasklet_kill(&adapter->neq_tasklet);
3382
3383         ehea_destroy_eq(adapter->neq);
3384         ehea_remove_adapter_mr(adapter);
3385         list_del(&adapter->list);
3386         kfree(adapter);
3387
3388         ehea_update_firmware_handles();
3389
3390         return 0;
3391 }
3392
3393 static void ehea_crash_handler(void)
3394 {
3395         int i;
3396
3397         if (ehea_fw_handles.arr)
3398                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3399                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3400                                              ehea_fw_handles.arr[i].fwh,
3401                                              FORCE_FREE);
3402
3403         if (ehea_bcmc_regs.arr)
3404                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3405                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3406                                               ehea_bcmc_regs.arr[i].port_id,
3407                                               ehea_bcmc_regs.arr[i].reg_type,
3408                                               ehea_bcmc_regs.arr[i].macaddr,
3409                                               0, H_DEREG_BCMC);
3410 }
3411
3412 static int ehea_mem_notifier(struct notifier_block *nb,
3413                              unsigned long action, void *data)
3414 {
3415         int ret = NOTIFY_BAD;
3416         struct memory_notify *arg = data;
3417
3418         mutex_lock(&dlpar_mem_lock);
3419
3420         switch (action) {
3421         case MEM_CANCEL_OFFLINE:
3422                 pr_info("memory offlining canceled");
3423                 /* Readd canceled memory block */
3424         case MEM_ONLINE:
3425                 pr_info("memory is going online");
3426                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3427                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3428                         goto out_unlock;
3429                 ehea_rereg_mrs();
3430                 break;
3431         case MEM_GOING_OFFLINE:
3432                 pr_info("memory is going offline");
3433                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3434                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3435                         goto out_unlock;
3436                 ehea_rereg_mrs();
3437                 break;
3438         default:
3439                 break;
3440         }
3441
3442         ehea_update_firmware_handles();
3443         ret = NOTIFY_OK;
3444
3445 out_unlock:
3446         mutex_unlock(&dlpar_mem_lock);
3447         return ret;
3448 }
3449
3450 static struct notifier_block ehea_mem_nb = {
3451         .notifier_call = ehea_mem_notifier,
3452 };
3453
3454 static int ehea_reboot_notifier(struct notifier_block *nb,
3455                                 unsigned long action, void *unused)
3456 {
3457         if (action == SYS_RESTART) {
3458                 pr_info("Reboot: freeing all eHEA resources\n");
3459                 ibmebus_unregister_driver(&ehea_driver);
3460         }
3461         return NOTIFY_DONE;
3462 }
3463
3464 static struct notifier_block ehea_reboot_nb = {
3465         .notifier_call = ehea_reboot_notifier,
3466 };
3467
3468 static int check_module_parm(void)
3469 {
3470         int ret = 0;
3471
3472         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3473             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3474                 pr_info("Bad parameter: rq1_entries\n");
3475                 ret = -EINVAL;
3476         }
3477         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3478             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3479                 pr_info("Bad parameter: rq2_entries\n");
3480                 ret = -EINVAL;
3481         }
3482         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3483             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3484                 pr_info("Bad parameter: rq3_entries\n");
3485                 ret = -EINVAL;
3486         }
3487         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3488             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3489                 pr_info("Bad parameter: sq_entries\n");
3490                 ret = -EINVAL;
3491         }
3492
3493         return ret;
3494 }
3495
3496 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3497                                       char *buf)
3498 {
3499         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3500 }
3501
3502 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3503                    ehea_show_capabilities, NULL);
3504
3505 static int __init ehea_module_init(void)
3506 {
3507         int ret;
3508
3509         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3510
3511         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3512         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3513
3514         mutex_init(&ehea_fw_handles.lock);
3515         spin_lock_init(&ehea_bcmc_regs.lock);
3516
3517         ret = check_module_parm();
3518         if (ret)
3519                 goto out;
3520
3521         ret = ehea_create_busmap();
3522         if (ret)
3523                 goto out;
3524
3525         ret = register_reboot_notifier(&ehea_reboot_nb);
3526         if (ret)
3527                 pr_info("failed registering reboot notifier\n");
3528
3529         ret = register_memory_notifier(&ehea_mem_nb);
3530         if (ret)
3531                 pr_info("failed registering memory remove notifier\n");
3532
3533         ret = crash_shutdown_register(ehea_crash_handler);
3534         if (ret)
3535                 pr_info("failed registering crash handler\n");
3536
3537         ret = ibmebus_register_driver(&ehea_driver);
3538         if (ret) {
3539                 pr_err("failed registering eHEA device driver on ebus\n");
3540                 goto out2;
3541         }
3542
3543         ret = driver_create_file(&ehea_driver.driver,
3544                                  &driver_attr_capabilities);
3545         if (ret) {
3546                 pr_err("failed to register capabilities attribute, ret=%d\n",
3547                        ret);
3548                 goto out3;
3549         }
3550
3551         return ret;
3552
3553 out3:
3554         ibmebus_unregister_driver(&ehea_driver);
3555 out2:
3556         unregister_memory_notifier(&ehea_mem_nb);
3557         unregister_reboot_notifier(&ehea_reboot_nb);
3558         crash_shutdown_unregister(ehea_crash_handler);
3559 out:
3560         return ret;
3561 }
3562
3563 static void __exit ehea_module_exit(void)
3564 {
3565         int ret;
3566
3567         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3568         ibmebus_unregister_driver(&ehea_driver);
3569         unregister_reboot_notifier(&ehea_reboot_nb);
3570         ret = crash_shutdown_unregister(ehea_crash_handler);
3571         if (ret)
3572                 pr_info("failed unregistering crash handler\n");
3573         unregister_memory_notifier(&ehea_mem_nb);
3574         kfree(ehea_fw_handles.arr);
3575         kfree(ehea_bcmc_regs.arr);
3576         ehea_destroy_busmap();
3577 }
3578
3579 module_init(ehea_module_init);
3580 module_exit(ehea_module_exit);