drivers/net/ehea/ehea_main.c

   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/in.h>
  32 #include <linux/ip.h>
  33 #include <linux/tcp.h>
  34 #include <linux/udp.h>
  35 #include <linux/if.h>
  36 #include <linux/list.h>
  37 #include <linux/slab.h>
  38 #include <linux/if_ether.h>
  39 #include <linux/notifier.h>
  40 #include <linux/reboot.h>
  41 #include <linux/memory.h>
  42 #include <asm/kexec.h>
  43 #include <linux/mutex.h>
  44
  45 #include <net/ip.h>
  46
  47 #include "ehea.h"
  48 #include "ehea_qmr.h"
  49 #include "ehea_phyp.h"
  50
  51
  52 MODULE_LICENSE("GPL");
  53 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  54 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  55 MODULE_VERSION(DRV_VERSION);
  56
  57
  58 static int msg_level = -1;
  59 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  60 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  61 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  62 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  63 static int use_mcs;
  64 static int use_lro;
  65 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  66 static int num_tx_qps = EHEA_NUM_TX_QP;
  67 static int prop_carrier_state;
  68
  69 module_param(msg_level, int, 0);
  70 module_param(rq1_entries, int, 0);
  71 module_param(rq2_entries, int, 0);
  72 module_param(rq3_entries, int, 0);
  73 module_param(sq_entries, int, 0);
  74 module_param(prop_carrier_state, int, 0);
  75 module_param(use_mcs, int, 0);
  76 module_param(use_lro, int, 0);
  77 module_param(lro_max_aggr, int, 0);
  78 module_param(num_tx_qps, int, 0);
  79
  80 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
  81 MODULE_PARM_DESC(msg_level, "msg_level");
  82 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  83                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  84 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  85                  "[2^x - 1], x = [6..14]. Default = "
  86                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  87 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  88                  "[2^x - 1], x = [6..14]. Default = "
  89                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  90 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  91                  "[2^x - 1], x = [6..14]. Default = "
  92                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  93 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  94                  "[2^x - 1], x = [6..14]. Default = "
  95                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  96 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
  97
  98 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
  99                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
 100 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
 101                  "Default = 0");
 102
 103 static int port_name_cnt;
 104 static LIST_HEAD(adapter_list);
 105 static unsigned long ehea_driver_flags;
 106 static DEFINE_MUTEX(dlpar_mem_lock);
 107 struct ehea_fw_handle_array ehea_fw_handles;
 108 struct ehea_bcmc_reg_array ehea_bcmc_regs;
 109
 110
 111 static int __devinit ehea_probe_adapter(struct platform_device *dev,
 112                                         const struct of_device_id *id);
 113
 114 static int __devexit ehea_remove(struct platform_device *dev);
 115
 116 static struct of_device_id ehea_device_table[] = {
 117         {
 118                 .name = "lhea",
 119                 .compatible = "IBM,lhea",
 120         },
 121         {},
 122 };
 123 MODULE_DEVICE_TABLE(of, ehea_device_table);
 124
 125 static struct of_platform_driver ehea_driver = {
 126         .driver = {
 127                 .name = "ehea",
 128                 .owner = THIS_MODULE,
 129                 .of_match_table = ehea_device_table,
 130         },
 131         .probe = ehea_probe_adapter,
 132         .remove = ehea_remove,
 133 };
 134
 135 void ehea_dump(void *adr, int len, char *msg)
 136 {
 137         int x;
 138         unsigned char *deb = adr;
 139         for (x = 0; x < len; x += 16) {
 140                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 141                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 142                 deb += 16;
 143         }
 144 }
 145
 146 void ehea_schedule_port_reset(struct ehea_port *port)
 147 {
 148         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 149                 schedule_work(&port->reset_task);
 150 }
 151
 152 static void ehea_update_firmware_handles(void)
 153 {
 154         struct ehea_fw_handle_entry *arr = NULL;
 155         struct ehea_adapter *adapter;
 156         int num_adapters = 0;
 157         int num_ports = 0;
 158         int num_portres = 0;
 159         int i = 0;
 160         int num_fw_handles, k, l;
 161
 162         /* Determine number of handles */
 163         mutex_lock(&ehea_fw_handles.lock);
 164
 165         list_for_each_entry(adapter, &adapter_list, list) {
 166                 num_adapters++;
 167
 168                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 169                         struct ehea_port *port = adapter->port[k];
 170
 171                         if (!port || (port->state != EHEA_PORT_UP))
 172                                 continue;
 173
 174                         num_ports++;
 175                         num_portres += port->num_def_qps + port->num_add_tx_qps;
 176                 }
 177         }
 178
 179         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 180                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 181                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 182
 183         if (num_fw_handles) {
 184                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 185                 if (!arr)
 186                         goto out;  /* Keep the existing array */
 187         } else
 188                 goto out_update;
 189
 190         list_for_each_entry(adapter, &adapter_list, list) {
 191                 if (num_adapters == 0)
 192                         break;
 193
 194                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 195                         struct ehea_port *port = adapter->port[k];
 196
 197                         if (!port || (port->state != EHEA_PORT_UP) ||
 198                             (num_ports == 0))
 199                                 continue;
 200
 201                         for (l = 0;
 202                              l < port->num_def_qps + port->num_add_tx_qps;
 203                              l++) {
 204                                 struct ehea_port_res *pr = &port->port_res[l];
 205
 206                                 arr[i].adh = adapter->handle;
 207                                 arr[i++].fwh = pr->qp->fw_handle;
 208                                 arr[i].adh = adapter->handle;
 209                                 arr[i++].fwh = pr->send_cq->fw_handle;
 210                                 arr[i].adh = adapter->handle;
 211                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 212                                 arr[i].adh = adapter->handle;
 213                                 arr[i++].fwh = pr->eq->fw_handle;
 214                                 arr[i].adh = adapter->handle;
 215                                 arr[i++].fwh = pr->send_mr.handle;
 216                                 arr[i].adh = adapter->handle;
 217                                 arr[i++].fwh = pr->recv_mr.handle;
 218                         }
 219                         arr[i].adh = adapter->handle;
 220                         arr[i++].fwh = port->qp_eq->fw_handle;
 221                         num_ports--;
 222                 }
 223
 224                 arr[i].adh = adapter->handle;
 225                 arr[i++].fwh = adapter->neq->fw_handle;
 226
 227                 if (adapter->mr.handle) {
 228                         arr[i].adh = adapter->handle;
 229                         arr[i++].fwh = adapter->mr.handle;
 230                 }
 231                 num_adapters--;
 232         }
 233
 234 out_update:
 235         kfree(ehea_fw_handles.arr);
 236         ehea_fw_handles.arr = arr;
 237         ehea_fw_handles.num_entries = i;
 238 out:
 239         mutex_unlock(&ehea_fw_handles.lock);
 240 }
 241
 242 static void ehea_update_bcmc_registrations(void)
 243 {
 244         unsigned long flags;
 245         struct ehea_bcmc_reg_entry *arr = NULL;
 246         struct ehea_adapter *adapter;
 247         struct ehea_mc_list *mc_entry;
 248         int num_registrations = 0;
 249         int i = 0;
 250         int k;
 251
 252         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 253
 254         /* Determine number of registrations */
 255         list_for_each_entry(adapter, &adapter_list, list)
 256                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 257                         struct ehea_port *port = adapter->port[k];
 258
 259                         if (!port || (port->state != EHEA_PORT_UP))
 260                                 continue;
 261
 262                         num_registrations += 2; /* Broadcast registrations */
 263
 264                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 265                                 num_registrations += 2;
 266                 }
 267
 268         if (num_registrations) {
 269                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 270                 if (!arr)
 271                         goto out;  /* Keep the existing array */
 272         } else
 273                 goto out_update;
 274
 275         list_for_each_entry(adapter, &adapter_list, list) {
 276                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 277                         struct ehea_port *port = adapter->port[k];
 278
 279                         if (!port || (port->state != EHEA_PORT_UP))
 280                                 continue;
 281
 282                         if (num_registrations == 0)
 283                                 goto out_update;
 284
 285                         arr[i].adh = adapter->handle;
 286                         arr[i].port_id = port->logical_port_id;
 287                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 288                                           EHEA_BCMC_UNTAGGED;
 289                         arr[i++].macaddr = port->mac_addr;
 290
 291                         arr[i].adh = adapter->handle;
 292                         arr[i].port_id = port->logical_port_id;
 293                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 294                                           EHEA_BCMC_VLANID_ALL;
 295                         arr[i++].macaddr = port->mac_addr;
 296                         num_registrations -= 2;
 297
 298                         list_for_each_entry(mc_entry,
 299                                             &port->mc_list->list, list) {
 300                                 if (num_registrations == 0)
 301                                         goto out_update;
 302
 303                                 arr[i].adh = adapter->handle;
 304                                 arr[i].port_id = port->logical_port_id;
 305                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 306                                                   EHEA_BCMC_MULTICAST |
 307                                                   EHEA_BCMC_UNTAGGED;
 308                                 arr[i++].macaddr = mc_entry->macaddr;
 309
 310                                 arr[i].adh = adapter->handle;
 311                                 arr[i].port_id = port->logical_port_id;
 312                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 313                                                   EHEA_BCMC_MULTICAST |
 314                                                   EHEA_BCMC_VLANID_ALL;
 315                                 arr[i++].macaddr = mc_entry->macaddr;
 316                                 num_registrations -= 2;
 317                         }
 318                 }
 319         }
 320
 321 out_update:
 322         kfree(ehea_bcmc_regs.arr);
 323         ehea_bcmc_regs.arr = arr;
 324         ehea_bcmc_regs.num_entries = i;
 325 out:
 326         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 327 }
 328
 329 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 330 {
 331         struct ehea_port *port = netdev_priv(dev);
 332         struct net_device_stats *stats = &port->stats;
 333         struct hcp_ehea_port_cb2 *cb2;
 334         u64 hret, rx_packets, tx_packets, rx_bytes = 0, tx_bytes = 0;
 335         int i;
 336
 337         memset(stats, 0, sizeof(*stats));
 338
 339         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 340         if (!cb2) {
 341                 netdev_err(dev, "no mem for cb2\n");
 342                 goto out;
 343         }
 344
 345         hret = ehea_h_query_ehea_port(port->adapter->handle,
 346                                       port->logical_port_id,
 347                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 348         if (hret != H_SUCCESS) {
 349                 netdev_err(dev, "query_ehea_port failed\n");
 350                 goto out_herr;
 351         }
 352
 353         if (netif_msg_hw(port))
 354                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 355
 356         rx_packets = 0;
 357         for (i = 0; i < port->num_def_qps; i++) {
 358                 rx_packets += port->port_res[i].rx_packets;
 359                 rx_bytes   += port->port_res[i].rx_bytes;
 360         }
 361
 362         tx_packets = 0;
 363         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 364                 tx_packets += port->port_res[i].tx_packets;
 365                 tx_bytes   += port->port_res[i].tx_bytes;
 366         }
 367
 368         stats->tx_packets = tx_packets;
 369         stats->multicast = cb2->rxmcp;
 370         stats->rx_errors = cb2->rxuerr;
 371         stats->rx_bytes = rx_bytes;
 372         stats->tx_bytes = tx_bytes;
 373         stats->rx_packets = rx_packets;
 374
 375 out_herr:
 376         free_page((unsigned long)cb2);
 377 out:
 378         return stats;
 379 }
 380
 381 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 382 {
 383         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 384         struct net_device *dev = pr->port->netdev;
 385         int max_index_mask = pr->rq1_skba.len - 1;
 386         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 387         int adder = 0;
 388         int i;
 389
 390         pr->rq1_skba.os_skbs = 0;
 391
 392         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 393                 if (nr_of_wqes > 0)
 394                         pr->rq1_skba.index = index;
 395                 pr->rq1_skba.os_skbs = fill_wqes;
 396                 return;
 397         }
 398
 399         for (i = 0; i < fill_wqes; i++) {
 400                 if (!skb_arr_rq1[index]) {
 401                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 402                                                               EHEA_L_PKT_SIZE);
 403                         if (!skb_arr_rq1[index]) {
 404                                 netdev_info(dev, "Unable to allocate enough skb in the array\n");
 405                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 406                                 break;
 407                         }
 408                 }
 409                 index--;
 410                 index &= max_index_mask;
 411                 adder++;
 412         }
 413
 414         if (adder == 0)
 415                 return;
 416
 417         /* Ring doorbell */
 418         ehea_update_rq1a(pr->qp, adder);
 419 }
 420
 421 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 422 {
 423         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 424         struct net_device *dev = pr->port->netdev;
 425         int i;
 426
 427         if (nr_rq1a > pr->rq1_skba.len) {
 428                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 429                 return;
 430         }
 431
 432         for (i = 0; i < nr_rq1a; i++) {
 433                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 434                 if (!skb_arr_rq1[i]) {
 435                         netdev_info(dev, "Not enough memory to allocate skb array\n");
 436                         break;
 437                 }
 438         }
 439         /* Ring doorbell */
 440         ehea_update_rq1a(pr->qp, i);
 441 }
 442
 443 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 444                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 445                               int num_wqes, int wqe_type, int packet_size)
 446 {
 447         struct net_device *dev = pr->port->netdev;
 448         struct ehea_qp *qp = pr->qp;
 449         struct sk_buff **skb_arr = q_skba->arr;
 450         struct ehea_rwqe *rwqe;
 451         int i, index, max_index_mask, fill_wqes;
 452         int adder = 0;
 453         int ret = 0;
 454
 455         fill_wqes = q_skba->os_skbs + num_wqes;
 456         q_skba->os_skbs = 0;
 457
 458         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 459                 q_skba->os_skbs = fill_wqes;
 460                 return ret;
 461         }
 462
 463         index = q_skba->index;
 464         max_index_mask = q_skba->len - 1;
 465         for (i = 0; i < fill_wqes; i++) {
 466                 u64 tmp_addr;
 467                 struct sk_buff *skb;
 468
 469                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 470                 if (!skb) {
 471                         q_skba->os_skbs = fill_wqes - i;
 472                         if (q_skba->os_skbs == q_skba->len - 2) {
 473                                 netdev_info(pr->port->netdev,
 474                                             "rq%i ran dry - no mem for skb\n",
 475                                             rq_nr);
 476                                 ret = -ENOMEM;
 477                         }
 478                         break;
 479                 }
 480
 481                 skb_arr[index] = skb;
 482                 tmp_addr = ehea_map_vaddr(skb->data);
 483                 if (tmp_addr == -1) {
 484                         dev_kfree_skb(skb);
 485                         q_skba->os_skbs = fill_wqes - i;
 486                         ret = 0;
 487                         break;
 488                 }
 489
 490                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 491                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 492                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 493                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 494                 rwqe->sg_list[0].vaddr = tmp_addr;
 495                 rwqe->sg_list[0].len = packet_size;
 496                 rwqe->data_segments = 1;
 497
 498                 index++;
 499                 index &= max_index_mask;
 500                 adder++;
 501         }
 502
 503         q_skba->index = index;
 504         if (adder == 0)
 505                 goto out;
 506
 507         /* Ring doorbell */
 508         iosync();
 509         if (rq_nr == 2)
 510                 ehea_update_rq2a(pr->qp, adder);
 511         else
 512                 ehea_update_rq3a(pr->qp, adder);
 513 out:
 514         return ret;
 515 }
 516
 517
 518 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 519 {
 520         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 521                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 522                                   EHEA_RQ2_PKT_SIZE);
 523 }
 524
 525
 526 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 527 {
 528         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 529                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 530                                   EHEA_MAX_PACKET_SIZE);
 531 }
 532
 533 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 534 {
 535         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 536         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 537                 return 0;
 538         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 539             (cqe->header_length == 0))
 540                 return 0;
 541         return -EINVAL;
 542 }
 543
 544 static inline void ehea_fill_skb(struct net_device *dev,
 545                                  struct sk_buff *skb, struct ehea_cqe *cqe)
 546 {
 547         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 548
 549         skb_put(skb, length);
 550         skb->protocol = eth_type_trans(skb, dev);
 551
 552         /* The packet was not an IPV4 packet so a complemented checksum was
 553            calculated. The value is found in the Internet Checksum field. */
 554         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 555                 skb->ip_summed = CHECKSUM_COMPLETE;
 556                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 557         } else
 558                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 559 }
 560
 561 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 562                                                int arr_len,
 563                                                struct ehea_cqe *cqe)
 564 {
 565         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 566         struct sk_buff *skb;
 567         void *pref;
 568         int x;
 569
 570         x = skb_index + 1;
 571         x &= (arr_len - 1);
 572
 573         pref = skb_array[x];
 574         if (pref) {
 575                 prefetchw(pref);
 576                 prefetchw(pref + EHEA_CACHE_LINE);
 577
 578                 pref = (skb_array[x]->data);
 579                 prefetch(pref);
 580                 prefetch(pref + EHEA_CACHE_LINE);
 581                 prefetch(pref + EHEA_CACHE_LINE * 2);
 582                 prefetch(pref + EHEA_CACHE_LINE * 3);
 583         }
 584
 585         skb = skb_array[skb_index];
 586         skb_array[skb_index] = NULL;
 587         return skb;
 588 }
 589
 590 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 591                                                   int arr_len, int wqe_index)
 592 {
 593         struct sk_buff *skb;
 594         void *pref;
 595         int x;
 596
 597         x = wqe_index + 1;
 598         x &= (arr_len - 1);
 599
 600         pref = skb_array[x];
 601         if (pref) {
 602                 prefetchw(pref);
 603                 prefetchw(pref + EHEA_CACHE_LINE);
 604
 605                 pref = (skb_array[x]->data);
 606                 prefetchw(pref);
 607                 prefetchw(pref + EHEA_CACHE_LINE);
 608         }
 609
 610         skb = skb_array[wqe_index];
 611         skb_array[wqe_index] = NULL;
 612         return skb;
 613 }
 614
 615 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 616                                  struct ehea_cqe *cqe, int *processed_rq2,
 617                                  int *processed_rq3)
 618 {
 619         struct sk_buff *skb;
 620
 621         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 622                 pr->p_stats.err_tcp_cksum++;
 623         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 624                 pr->p_stats.err_ip_cksum++;
 625         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 626                 pr->p_stats.err_frame_crc++;
 627
 628         if (rq == 2) {
 629                 *processed_rq2 += 1;
 630                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 631                 dev_kfree_skb(skb);
 632         } else if (rq == 3) {
 633                 *processed_rq3 += 1;
 634                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 635                 dev_kfree_skb(skb);
 636         }
 637
 638         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 639                 if (netif_msg_rx_err(pr->port)) {
 640                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 641                                pr->qp->init_attr.qp_nr);
 642                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 643                 }
 644                 ehea_schedule_port_reset(pr->port);
 645                 return 1;
 646         }
 647
 648         return 0;
 649 }
 650
 651 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 652                        void **tcph, u64 *hdr_flags, void *priv)
 653 {
 654         struct ehea_cqe *cqe = priv;
 655         unsigned int ip_len;
 656         struct iphdr *iph;
 657
 658         /* non tcp/udp packets */
 659         if (!cqe->header_length)
 660                 return -1;
 661
 662         /* non tcp packet */
 663         skb_reset_network_header(skb);
 664         iph = ip_hdr(skb);
 665         if (iph->protocol != IPPROTO_TCP)
 666                 return -1;
 667
 668         ip_len = ip_hdrlen(skb);
 669         skb_set_transport_header(skb, ip_len);
 670         *tcph = tcp_hdr(skb);
 671
 672         /* check if ip header and tcp header are complete */
 673         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 674                 return -1;
 675
 676         *hdr_flags = LRO_IPV4 | LRO_TCP;
 677         *iphdr = iph;
 678
 679         return 0;
 680 }
 681
 682 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 683                           struct sk_buff *skb)
 684 {
 685         int vlan_extracted = ((cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) &&
 686                               pr->port->vgrp);
 687
 688         if (skb->dev->features & NETIF_F_LRO) {
 689                 if (vlan_extracted)
 690                         lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
 691                                                      pr->port->vgrp,
 692                                                      cqe->vlan_tag,
 693                                                      cqe);
 694                 else
 695                         lro_receive_skb(&pr->lro_mgr, skb, cqe);
 696         } else {
 697                 if (vlan_extracted)
 698                         vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
 699                                                  cqe->vlan_tag);
 700                 else
 701                         netif_receive_skb(skb);
 702         }
 703 }
 704
 705 static int ehea_proc_rwqes(struct net_device *dev,
 706                            struct ehea_port_res *pr,
 707                            int budget)
 708 {
 709         struct ehea_port *port = pr->port;
 710         struct ehea_qp *qp = pr->qp;
 711         struct ehea_cqe *cqe;
 712         struct sk_buff *skb;
 713         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 714         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 715         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 716         int skb_arr_rq1_len = pr->rq1_skba.len;
 717         int skb_arr_rq2_len = pr->rq2_skba.len;
 718         int skb_arr_rq3_len = pr->rq3_skba.len;
 719         int processed, processed_rq1, processed_rq2, processed_rq3;
 720         u64 processed_bytes = 0;
 721         int wqe_index, last_wqe_index, rq, port_reset;
 722
 723         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 724         last_wqe_index = 0;
 725
 726         cqe = ehea_poll_rq1(qp, &wqe_index);
 727         while ((processed < budget) && cqe) {
 728                 ehea_inc_rq1(qp);
 729                 processed_rq1++;
 730                 processed++;
 731                 if (netif_msg_rx_status(port))
 732                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 733
 734                 last_wqe_index = wqe_index;
 735                 rmb();
 736                 if (!ehea_check_cqe(cqe, &rq)) {
 737                         if (rq == 1) {
 738                                 /* LL RQ1 */
 739                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 740                                                           skb_arr_rq1_len,
 741                                                           wqe_index);
 742                                 if (unlikely(!skb)) {
 743                                         netif_info(port, rx_err, dev,
 744                                                   "LL rq1: skb=NULL\n");
 745
 746                                         skb = netdev_alloc_skb(dev,
 747                                                                EHEA_L_PKT_SIZE);
 748                                         if (!skb) {
 749                                                 netdev_err(dev, "Not enough memory to allocate skb\n");
 750                                                 break;
 751                                         }
 752                                 }
 753                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 754                                                  cqe->num_bytes_transfered - 4);
 755                                 ehea_fill_skb(dev, skb, cqe);
 756                         } else if (rq == 2) {
 757                                 /* RQ2 */
 758                                 skb = get_skb_by_index(skb_arr_rq2,
 759                                                        skb_arr_rq2_len, cqe);
 760                                 if (unlikely(!skb)) {
 761                                         netif_err(port, rx_err, dev,
 762                                                   "rq2: skb=NULL\n");
 763                                         break;
 764                                 }
 765                                 ehea_fill_skb(dev, skb, cqe);
 766                                 processed_rq2++;
 767                         } else {
 768                                 /* RQ3 */
 769                                 skb = get_skb_by_index(skb_arr_rq3,
 770                                                        skb_arr_rq3_len, cqe);
 771                                 if (unlikely(!skb)) {
 772                                         netif_err(port, rx_err, dev,
 773                                                   "rq3: skb=NULL\n");
 774                                         break;
 775                                 }
 776                                 ehea_fill_skb(dev, skb, cqe);
 777                                 processed_rq3++;
 778                         }
 779
 780                         processed_bytes += skb->len;
 781                         ehea_proc_skb(pr, cqe, skb);
 782                 } else {
 783                         pr->p_stats.poll_receive_errors++;
 784                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 785                                                            &processed_rq2,
 786                                                            &processed_rq3);
 787                         if (port_reset)
 788                                 break;
 789                 }
 790                 cqe = ehea_poll_rq1(qp, &wqe_index);
 791         }
 792         if (dev->features & NETIF_F_LRO)
 793                 lro_flush_all(&pr->lro_mgr);
 794
 795         pr->rx_packets += processed;
 796         pr->rx_bytes += processed_bytes;
 797
 798         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 799         ehea_refill_rq2(pr, processed_rq2);
 800         ehea_refill_rq3(pr, processed_rq3);
 801
 802         return processed;
 803 }
 804
 805 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 806
 807 static void reset_sq_restart_flag(struct ehea_port *port)
 808 {
 809         int i;
 810
 811         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 812                 struct ehea_port_res *pr = &port->port_res[i];
 813                 pr->sq_restart_flag = 0;
 814         }
 815         wake_up(&port->restart_wq);
 816 }
 817
 818 static void check_sqs(struct ehea_port *port)
 819 {
 820         struct ehea_swqe *swqe;
 821         int swqe_index;
 822         int i, k;
 823
 824         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 825                 struct ehea_port_res *pr = &port->port_res[i];
 826                 int ret;
 827                 k = 0;
 828                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 829                 memset(swqe, 0, SWQE_HEADER_SIZE);
 830                 atomic_dec(&pr->swqe_avail);
 831
 832                 swqe->tx_control |= EHEA_SWQE_PURGE;
 833                 swqe->wr_id = SWQE_RESTART_CHECK;
 834                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 835                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 836                 swqe->immediate_data_length = 80;
 837
 838                 ehea_post_swqe(pr->qp, swqe);
 839
 840                 ret = wait_event_timeout(port->restart_wq,
 841                                          pr->sq_restart_flag == 0,
 842                                          msecs_to_jiffies(100));
 843
 844                 if (!ret) {
 845                         pr_err("HW/SW queues out of sync\n");
 846                         ehea_schedule_port_reset(pr->port);
 847                         return;
 848                 }
 849         }
 850 }
 851
 852
 853 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 854 {
 855         struct sk_buff *skb;
 856         struct ehea_cq *send_cq = pr->send_cq;
 857         struct ehea_cqe *cqe;
 858         int quota = my_quota;
 859         int cqe_counter = 0;
 860         int swqe_av = 0;
 861         int index;
 862         unsigned long flags;
 863
 864         cqe = ehea_poll_cq(send_cq);
 865         while (cqe && (quota > 0)) {
 866                 ehea_inc_cq(send_cq);
 867
 868                 cqe_counter++;
 869                 rmb();
 870
 871                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 872                         pr->sq_restart_flag = 1;
 873                         swqe_av++;
 874                         break;
 875                 }
 876
 877                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 878                         pr_err("Bad send completion status=0x%04X\n",
 879                                cqe->status);
 880
 881                         if (netif_msg_tx_err(pr->port))
 882                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 883
 884                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 885                                 pr_err("Resetting port\n");
 886                                 ehea_schedule_port_reset(pr->port);
 887                                 break;
 888                         }
 889                 }
 890
 891                 if (netif_msg_tx_done(pr->port))
 892                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 893
 894                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 895                            == EHEA_SWQE2_TYPE)) {
 896
 897                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 898                         skb = pr->sq_skba.arr[index];
 899                         dev_kfree_skb(skb);
 900                         pr->sq_skba.arr[index] = NULL;
 901                 }
 902
 903                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 904                 quota--;
 905
 906                 cqe = ehea_poll_cq(send_cq);
 907         }
 908
 909         ehea_update_feca(send_cq, cqe_counter);
 910         atomic_add(swqe_av, &pr->swqe_avail);
 911
 912         spin_lock_irqsave(&pr->netif_queue, flags);
 913
 914         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 915                                   >= pr->swqe_refill_th)) {
 916                 netif_wake_queue(pr->port->netdev);
 917                 pr->queue_stopped = 0;
 918         }
 919         spin_unlock_irqrestore(&pr->netif_queue, flags);
 920         wake_up(&pr->port->swqe_avail_wq);
 921
 922         return cqe;
 923 }
 924
 925 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 926 #define EHEA_POLL_MAX_CQES 65535
 927
 928 static int ehea_poll(struct napi_struct *napi, int budget)
 929 {
 930         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 931                                                 napi);
 932         struct net_device *dev = pr->port->netdev;
 933         struct ehea_cqe *cqe;
 934         struct ehea_cqe *cqe_skb = NULL;
 935         int force_irq, wqe_index;
 936         int rx = 0;
 937
 938         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 939         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 940
 941         if (!force_irq)
 942                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 943
 944         while ((rx != budget) || force_irq) {
 945                 pr->poll_counter = 0;
 946                 force_irq = 0;
 947                 napi_complete(napi);
 948                 ehea_reset_cq_ep(pr->recv_cq);
 949                 ehea_reset_cq_ep(pr->send_cq);
 950                 ehea_reset_cq_n1(pr->recv_cq);
 951                 ehea_reset_cq_n1(pr->send_cq);
 952                 rmb();
 953                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 954                 cqe_skb = ehea_poll_cq(pr->send_cq);
 955
 956                 if (!cqe && !cqe_skb)
 957                         return rx;
 958
 959                 if (!napi_reschedule(napi))
 960                         return rx;
 961
 962                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 963                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 964         }
 965
 966         pr->poll_counter++;
 967         return rx;
 968 }
 969
 970 #ifdef CONFIG_NET_POLL_CONTROLLER
 971 static void ehea_netpoll(struct net_device *dev)
 972 {
 973         struct ehea_port *port = netdev_priv(dev);
 974         int i;
 975
 976         for (i = 0; i < port->num_def_qps; i++)
 977                 napi_schedule(&port->port_res[i].napi);
 978 }
 979 #endif
 980
 981 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 982 {
 983         struct ehea_port_res *pr = param;
 984
 985         napi_schedule(&pr->napi);
 986
 987         return IRQ_HANDLED;
 988 }
 989
 990 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 991 {
 992         struct ehea_port *port = param;
 993         struct ehea_eqe *eqe;
 994         struct ehea_qp *qp;
 995         u32 qp_token;
 996         u64 resource_type, aer, aerr;
 997         int reset_port = 0;
 998
 999         eqe = ehea_poll_eq(port->qp_eq);
1000
1001         while (eqe) {
1002                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
1003                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
1004                        eqe->entry, qp_token);
1005
1006                 qp = port->port_res[qp_token].qp;
1007
1008                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
1009                                                 &aer, &aerr);
1010
1011                 if (resource_type == EHEA_AER_RESTYPE_QP) {
1012                         if ((aer & EHEA_AER_RESET_MASK) ||
1013                             (aerr & EHEA_AERR_RESET_MASK))
1014                                  reset_port = 1;
1015                 } else
1016                         reset_port = 1;   /* Reset in case of CQ or EQ error */
1017
1018                 eqe = ehea_poll_eq(port->qp_eq);
1019         }
1020
1021         if (reset_port) {
1022                 pr_err("Resetting port\n");
1023                 ehea_schedule_port_reset(port);
1024         }
1025
1026         return IRQ_HANDLED;
1027 }
1028
1029 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
1030                                        int logical_port)
1031 {
1032         int i;
1033
1034         for (i = 0; i < EHEA_MAX_PORTS; i++)
1035                 if (adapter->port[i])
1036                         if (adapter->port[i]->logical_port_id == logical_port)
1037                                 return adapter->port[i];
1038         return NULL;
1039 }
1040
1041 int ehea_sense_port_attr(struct ehea_port *port)
1042 {
1043         int ret;
1044         u64 hret;
1045         struct hcp_ehea_port_cb0 *cb0;
1046
1047         /* may be called via ehea_neq_tasklet() */
1048         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1049         if (!cb0) {
1050                 pr_err("no mem for cb0\n");
1051                 ret = -ENOMEM;
1052                 goto out;
1053         }
1054
1055         hret = ehea_h_query_ehea_port(port->adapter->handle,
1056                                       port->logical_port_id, H_PORT_CB0,
1057                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1058                                       cb0);
1059         if (hret != H_SUCCESS) {
1060                 ret = -EIO;
1061                 goto out_free;
1062         }
1063
1064         /* MAC address */
1065         port->mac_addr = cb0->port_mac_addr << 16;
1066
1067         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1068                 ret = -EADDRNOTAVAIL;
1069                 goto out_free;
1070         }
1071
1072         /* Port speed */
1073         switch (cb0->port_speed) {
1074         case H_SPEED_10M_H:
1075                 port->port_speed = EHEA_SPEED_10M;
1076                 port->full_duplex = 0;
1077                 break;
1078         case H_SPEED_10M_F:
1079                 port->port_speed = EHEA_SPEED_10M;
1080                 port->full_duplex = 1;
1081                 break;
1082         case H_SPEED_100M_H:
1083                 port->port_speed = EHEA_SPEED_100M;
1084                 port->full_duplex = 0;
1085                 break;
1086         case H_SPEED_100M_F:
1087                 port->port_speed = EHEA_SPEED_100M;
1088                 port->full_duplex = 1;
1089                 break;
1090         case H_SPEED_1G_F:
1091                 port->port_speed = EHEA_SPEED_1G;
1092                 port->full_duplex = 1;
1093                 break;
1094         case H_SPEED_10G_F:
1095                 port->port_speed = EHEA_SPEED_10G;
1096                 port->full_duplex = 1;
1097                 break;
1098         default:
1099                 port->port_speed = 0;
1100                 port->full_duplex = 0;
1101                 break;
1102         }
1103
1104         port->autoneg = 1;
1105         port->num_mcs = cb0->num_default_qps;
1106
1107         /* Number of default QPs */
1108         if (use_mcs)
1109                 port->num_def_qps = cb0->num_default_qps;
1110         else
1111                 port->num_def_qps = 1;
1112
1113         if (!port->num_def_qps) {
1114                 ret = -EINVAL;
1115                 goto out_free;
1116         }
1117
1118         port->num_tx_qps = num_tx_qps;
1119
1120         if (port->num_def_qps >= port->num_tx_qps)
1121                 port->num_add_tx_qps = 0;
1122         else
1123                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1124
1125         ret = 0;
1126 out_free:
1127         if (ret || netif_msg_probe(port))
1128                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1129         free_page((unsigned long)cb0);
1130 out:
1131         return ret;
1132 }
1133
1134 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1135 {
1136         struct hcp_ehea_port_cb4 *cb4;
1137         u64 hret;
1138         int ret = 0;
1139
1140         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1141         if (!cb4) {
1142                 pr_err("no mem for cb4\n");
1143                 ret = -ENOMEM;
1144                 goto out;
1145         }
1146
1147         cb4->port_speed = port_speed;
1148
1149         netif_carrier_off(port->netdev);
1150
1151         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1152                                        port->logical_port_id,
1153                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1154         if (hret == H_SUCCESS) {
1155                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1156
1157                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1158                                               port->logical_port_id,
1159                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1160                                               cb4);
1161                 if (hret == H_SUCCESS) {
1162                         switch (cb4->port_speed) {
1163                         case H_SPEED_10M_H:
1164                                 port->port_speed = EHEA_SPEED_10M;
1165                                 port->full_duplex = 0;
1166                                 break;
1167                         case H_SPEED_10M_F:
1168                                 port->port_speed = EHEA_SPEED_10M;
1169                                 port->full_duplex = 1;
1170                                 break;
1171                         case H_SPEED_100M_H:
1172                                 port->port_speed = EHEA_SPEED_100M;
1173                                 port->full_duplex = 0;
1174                                 break;
1175                         case H_SPEED_100M_F:
1176                                 port->port_speed = EHEA_SPEED_100M;
1177                                 port->full_duplex = 1;
1178                                 break;
1179                         case H_SPEED_1G_F:
1180                                 port->port_speed = EHEA_SPEED_1G;
1181                                 port->full_duplex = 1;
1182                                 break;
1183                         case H_SPEED_10G_F:
1184                                 port->port_speed = EHEA_SPEED_10G;
1185                                 port->full_duplex = 1;
1186                                 break;
1187                         default:
1188                                 port->port_speed = 0;
1189                                 port->full_duplex = 0;
1190                                 break;
1191                         }
1192                 } else {
1193                         pr_err("Failed sensing port speed\n");
1194                         ret = -EIO;
1195                 }
1196         } else {
1197                 if (hret == H_AUTHORITY) {
1198                         pr_info("Hypervisor denied setting port speed\n");
1199                         ret = -EPERM;
1200                 } else {
1201                         ret = -EIO;
1202                         pr_err("Failed setting port speed\n");
1203                 }
1204         }
1205         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1206                 netif_carrier_on(port->netdev);
1207
1208         free_page((unsigned long)cb4);
1209 out:
1210         return ret;
1211 }
1212
1213 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1214 {
1215         int ret;
1216         u8 ec;
1217         u8 portnum;
1218         struct ehea_port *port;
1219         struct net_device *dev;
1220
1221         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1222         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1223         port = ehea_get_port(adapter, portnum);
1224         dev = port->netdev;
1225
1226         switch (ec) {
1227         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1228
1229                 if (!port) {
1230                         netdev_err(dev, "unknown portnum %x\n", portnum);
1231                         break;
1232                 }
1233
1234                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1235                         if (!netif_carrier_ok(dev)) {
1236                                 ret = ehea_sense_port_attr(port);
1237                                 if (ret) {
1238                                         netdev_err(dev, "failed resensing port attributes\n");
1239                                         break;
1240                                 }
1241
1242                                 netif_info(port, link, dev,
1243                                            "Logical port up: %dMbps %s Duplex\n",
1244                                            port->port_speed,
1245                                            port->full_duplex == 1 ?
1246                                            "Full" : "Half");
1247
1248                                 netif_carrier_on(dev);
1249                                 netif_wake_queue(dev);
1250                         }
1251                 } else
1252                         if (netif_carrier_ok(dev)) {
1253                                 netif_info(port, link, dev,
1254                                            "Logical port down\n");
1255                                 netif_carrier_off(dev);
1256                                 netif_stop_queue(dev);
1257                         }
1258
1259                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1260                         port->phy_link = EHEA_PHY_LINK_UP;
1261                         netif_info(port, link, dev,
1262                                    "Physical port up\n");
1263                         if (prop_carrier_state)
1264                                 netif_carrier_on(dev);
1265                 } else {
1266                         port->phy_link = EHEA_PHY_LINK_DOWN;
1267                         netif_info(port, link, dev,
1268                                    "Physical port down\n");
1269                         if (prop_carrier_state)
1270                                 netif_carrier_off(dev);
1271                 }
1272
1273                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1274                         netdev_info(dev,
1275                                     "External switch port is primary port\n");
1276                 else
1277                         netdev_info(dev,
1278                                     "External switch port is backup port\n");
1279
1280                 break;
1281         case EHEA_EC_ADAPTER_MALFUNC:
1282                 netdev_err(dev, "Adapter malfunction\n");
1283                 break;
1284         case EHEA_EC_PORT_MALFUNC:
1285                 netdev_info(dev, "Port malfunction\n");
1286                 netif_carrier_off(dev);
1287                 netif_stop_queue(dev);
1288                 break;
1289         default:
1290                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1291                 break;
1292         }
1293 }
1294
1295 static void ehea_neq_tasklet(unsigned long data)
1296 {
1297         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1298         struct ehea_eqe *eqe;
1299         u64 event_mask;
1300
1301         eqe = ehea_poll_eq(adapter->neq);
1302         pr_debug("eqe=%p\n", eqe);
1303
1304         while (eqe) {
1305                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1306                 ehea_parse_eqe(adapter, eqe->entry);
1307                 eqe = ehea_poll_eq(adapter->neq);
1308                 pr_debug("next eqe=%p\n", eqe);
1309         }
1310
1311         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1312                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1313                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1314
1315         ehea_h_reset_events(adapter->handle,
1316                             adapter->neq->fw_handle, event_mask);
1317 }
1318
1319 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1320 {
1321         struct ehea_adapter *adapter = param;
1322         tasklet_hi_schedule(&adapter->neq_tasklet);
1323         return IRQ_HANDLED;
1324 }
1325
1326
1327 static int ehea_fill_port_res(struct ehea_port_res *pr)
1328 {
1329         int ret;
1330         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1331
1332         ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1333                                - init_attr->act_nr_rwqes_rq2
1334                                - init_attr->act_nr_rwqes_rq3 - 1);
1335
1336         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1337
1338         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1339
1340         return ret;
1341 }
1342
1343 static int ehea_reg_interrupts(struct net_device *dev)
1344 {
1345         struct ehea_port *port = netdev_priv(dev);
1346         struct ehea_port_res *pr;
1347         int i, ret;
1348
1349
1350         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1351                  dev->name);
1352
1353         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1354                                   ehea_qp_aff_irq_handler,
1355                                   IRQF_DISABLED, port->int_aff_name, port);
1356         if (ret) {
1357                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1358                            port->qp_eq->attr.ist1);
1359                 goto out_free_qpeq;
1360         }
1361
1362         netif_info(port, ifup, dev,
1363                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1364                    port->qp_eq->attr.ist1);
1365
1366
1367         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1368                 pr = &port->port_res[i];
1369                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1370                          "%s-queue%d", dev->name, i);
1371                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1372                                           ehea_recv_irq_handler,
1373                                           IRQF_DISABLED, pr->int_send_name,
1374                                           pr);
1375                 if (ret) {
1376                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1377                                    i, pr->eq->attr.ist1);
1378                         goto out_free_req;
1379                 }
1380                 netif_info(port, ifup, dev,
1381                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1382                            pr->eq->attr.ist1, i);
1383         }
1384 out:
1385         return ret;
1386
1387
1388 out_free_req:
1389         while (--i >= 0) {
1390                 u32 ist = port->port_res[i].eq->attr.ist1;
1391                 ibmebus_free_irq(ist, &port->port_res[i]);
1392         }
1393
1394 out_free_qpeq:
1395         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1396         i = port->num_def_qps;
1397
1398         goto out;
1399
1400 }
1401
1402 static void ehea_free_interrupts(struct net_device *dev)
1403 {
1404         struct ehea_port *port = netdev_priv(dev);
1405         struct ehea_port_res *pr;
1406         int i;
1407
1408         /* send */
1409
1410         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1411                 pr = &port->port_res[i];
1412                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1413                 netif_info(port, intr, dev,
1414                            "free send irq for res %d with handle 0x%X\n",
1415                            i, pr->eq->attr.ist1);
1416         }
1417
1418         /* associated events */
1419         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1420         netif_info(port, intr, dev,
1421                    "associated event interrupt for handle 0x%X freed\n",
1422                    port->qp_eq->attr.ist1);
1423 }
1424
1425 static int ehea_configure_port(struct ehea_port *port)
1426 {
1427         int ret, i;
1428         u64 hret, mask;
1429         struct hcp_ehea_port_cb0 *cb0;
1430
1431         ret = -ENOMEM;
1432         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1433         if (!cb0)
1434                 goto out;
1435
1436         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1437                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1438                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1439                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1440                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1441                                       PXLY_RC_VLAN_FILTER)
1442                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1443
1444         for (i = 0; i < port->num_mcs; i++)
1445                 if (use_mcs)
1446                         cb0->default_qpn_arr[i] =
1447                                 port->port_res[i].qp->init_attr.qp_nr;
1448                 else
1449                         cb0->default_qpn_arr[i] =
1450                                 port->port_res[0].qp->init_attr.qp_nr;
1451
1452         if (netif_msg_ifup(port))
1453                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1454
1455         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1456              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1457
1458         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1459                                        port->logical_port_id,
1460                                        H_PORT_CB0, mask, cb0);
1461         ret = -EIO;
1462         if (hret != H_SUCCESS)
1463                 goto out_free;
1464
1465         ret = 0;
1466
1467 out_free:
1468         free_page((unsigned long)cb0);
1469 out:
1470         return ret;
1471 }
1472
1473 int ehea_gen_smrs(struct ehea_port_res *pr)
1474 {
1475         int ret;
1476         struct ehea_adapter *adapter = pr->port->adapter;
1477
1478         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1479         if (ret)
1480                 goto out;
1481
1482         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1483         if (ret)
1484                 goto out_free;
1485
1486         return 0;
1487
1488 out_free:
1489         ehea_rem_mr(&pr->send_mr);
1490 out:
1491         pr_err("Generating SMRS failed\n");
1492         return -EIO;
1493 }
1494
1495 int ehea_rem_smrs(struct ehea_port_res *pr)
1496 {
1497         if ((ehea_rem_mr(&pr->send_mr)) ||
1498             (ehea_rem_mr(&pr->recv_mr)))
1499                 return -EIO;
1500         else
1501                 return 0;
1502 }
1503
1504 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1505 {
1506         int arr_size = sizeof(void *) * max_q_entries;
1507
1508         q_skba->arr = vzalloc(arr_size);
1509         if (!q_skba->arr)
1510                 return -ENOMEM;
1511
1512         q_skba->len = max_q_entries;
1513         q_skba->index = 0;
1514         q_skba->os_skbs = 0;
1515
1516         return 0;
1517 }
1518
1519 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1520                               struct port_res_cfg *pr_cfg, int queue_token)
1521 {
1522         struct ehea_adapter *adapter = port->adapter;
1523         enum ehea_eq_type eq_type = EHEA_EQ;
1524         struct ehea_qp_init_attr *init_attr = NULL;
1525         int ret = -EIO;
1526         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1527
1528         tx_bytes = pr->tx_bytes;
1529         tx_packets = pr->tx_packets;
1530         rx_bytes = pr->rx_bytes;
1531         rx_packets = pr->rx_packets;
1532
1533         memset(pr, 0, sizeof(struct ehea_port_res));
1534
1535         pr->tx_bytes = rx_bytes;
1536         pr->tx_packets = tx_packets;
1537         pr->rx_bytes = rx_bytes;
1538         pr->rx_packets = rx_packets;
1539
1540         pr->port = port;
1541         spin_lock_init(&pr->xmit_lock);
1542         spin_lock_init(&pr->netif_queue);
1543
1544         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1545         if (!pr->eq) {
1546                 pr_err("create_eq failed (eq)\n");
1547                 goto out_free;
1548         }
1549
1550         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1551                                      pr->eq->fw_handle,
1552                                      port->logical_port_id);
1553         if (!pr->recv_cq) {
1554                 pr_err("create_cq failed (cq_recv)\n");
1555                 goto out_free;
1556         }
1557
1558         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1559                                      pr->eq->fw_handle,
1560                                      port->logical_port_id);
1561         if (!pr->send_cq) {
1562                 pr_err("create_cq failed (cq_send)\n");
1563                 goto out_free;
1564         }
1565
1566         if (netif_msg_ifup(port))
1567                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1568                         pr->send_cq->attr.act_nr_of_cqes,
1569                         pr->recv_cq->attr.act_nr_of_cqes);
1570
1571         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1572         if (!init_attr) {
1573                 ret = -ENOMEM;
1574                 pr_err("no mem for ehea_qp_init_attr\n");
1575                 goto out_free;
1576         }
1577
1578         init_attr->low_lat_rq1 = 1;
1579         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1580         init_attr->rq_count = 3;
1581         init_attr->qp_token = queue_token;
1582         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1583         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1584         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1585         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1586         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1587         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1588         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1589         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1590         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1591         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1592         init_attr->port_nr = port->logical_port_id;
1593         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1594         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1595         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1596
1597         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1598         if (!pr->qp) {
1599                 pr_err("create_qp failed\n");
1600                 ret = -EIO;
1601                 goto out_free;
1602         }
1603
1604         if (netif_msg_ifup(port))
1605                 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",
1606                         init_attr->qp_nr,
1607                         init_attr->act_nr_send_wqes,
1608                         init_attr->act_nr_rwqes_rq1,
1609                         init_attr->act_nr_rwqes_rq2,
1610                         init_attr->act_nr_rwqes_rq3);
1611
1612         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1613
1614         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1615         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1616         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1617         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1618         if (ret)
1619                 goto out_free;
1620
1621         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1622         if (ehea_gen_smrs(pr) != 0) {
1623                 ret = -EIO;
1624                 goto out_free;
1625         }
1626
1627         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1628
1629         kfree(init_attr);
1630
1631         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1632
1633         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1634         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1635         pr->lro_mgr.lro_arr = pr->lro_desc;
1636         pr->lro_mgr.get_skb_header = get_skb_hdr;
1637         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1638         pr->lro_mgr.dev = port->netdev;
1639         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1640         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1641
1642         ret = 0;
1643         goto out;
1644
1645 out_free:
1646         kfree(init_attr);
1647         vfree(pr->sq_skba.arr);
1648         vfree(pr->rq1_skba.arr);
1649         vfree(pr->rq2_skba.arr);
1650         vfree(pr->rq3_skba.arr);
1651         ehea_destroy_qp(pr->qp);
1652         ehea_destroy_cq(pr->send_cq);
1653         ehea_destroy_cq(pr->recv_cq);
1654         ehea_destroy_eq(pr->eq);
1655 out:
1656         return ret;
1657 }
1658
1659 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1660 {
1661         int ret, i;
1662
1663         if (pr->qp)
1664                 netif_napi_del(&pr->napi);
1665
1666         ret = ehea_destroy_qp(pr->qp);
1667
1668         if (!ret) {
1669                 ehea_destroy_cq(pr->send_cq);
1670                 ehea_destroy_cq(pr->recv_cq);
1671                 ehea_destroy_eq(pr->eq);
1672
1673                 for (i = 0; i < pr->rq1_skba.len; i++)
1674                         if (pr->rq1_skba.arr[i])
1675                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1676
1677                 for (i = 0; i < pr->rq2_skba.len; i++)
1678                         if (pr->rq2_skba.arr[i])
1679                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1680
1681                 for (i = 0; i < pr->rq3_skba.len; i++)
1682                         if (pr->rq3_skba.arr[i])
1683                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1684
1685                 for (i = 0; i < pr->sq_skba.len; i++)
1686                         if (pr->sq_skba.arr[i])
1687                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1688
1689                 vfree(pr->rq1_skba.arr);
1690                 vfree(pr->rq2_skba.arr);
1691                 vfree(pr->rq3_skba.arr);
1692                 vfree(pr->sq_skba.arr);
1693                 ret = ehea_rem_smrs(pr);
1694         }
1695         return ret;
1696 }
1697
1698 /*
1699  * The write_* functions store information in swqe which is used by
1700  * the hardware to calculate the ip/tcp/udp checksum
1701  */
1702
1703 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1704                                       const struct sk_buff *skb)
1705 {
1706         swqe->ip_start = skb_network_offset(skb);
1707         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1708 }
1709
1710 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1711                                         const struct sk_buff *skb)
1712 {
1713         swqe->tcp_offset =
1714                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1715
1716         swqe->tcp_end = (u16)skb->len - 1;
1717 }
1718
1719 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1720                                         const struct sk_buff *skb)
1721 {
1722         swqe->tcp_offset =
1723                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1724
1725         swqe->tcp_end = (u16)skb->len - 1;
1726 }
1727
1728
1729 static void write_swqe2_TSO(struct sk_buff *skb,
1730                             struct ehea_swqe *swqe, u32 lkey)
1731 {
1732         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1733         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1734         int skb_data_size = skb_headlen(skb);
1735         int headersize;
1736
1737         /* Packet is TCP with TSO enabled */
1738         swqe->tx_control |= EHEA_SWQE_TSO;
1739         swqe->mss = skb_shinfo(skb)->gso_size;
1740         /* copy only eth/ip/tcp headers to immediate data and
1741          * the rest of skb->data to sg1entry
1742          */
1743         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1744
1745         skb_data_size = skb_headlen(skb);
1746
1747         if (skb_data_size >= headersize) {
1748                 /* copy immediate data */
1749                 skb_copy_from_linear_data(skb, imm_data, headersize);
1750                 swqe->immediate_data_length = headersize;
1751
1752                 if (skb_data_size > headersize) {
1753                         /* set sg1entry data */
1754                         sg1entry->l_key = lkey;
1755                         sg1entry->len = skb_data_size - headersize;
1756                         sg1entry->vaddr =
1757                                 ehea_map_vaddr(skb->data + headersize);
1758                         swqe->descriptors++;
1759                 }
1760         } else
1761                 pr_err("cannot handle fragmented headers\n");
1762 }
1763
1764 static void write_swqe2_nonTSO(struct sk_buff *skb,
1765                                struct ehea_swqe *swqe, u32 lkey)
1766 {
1767         int skb_data_size = skb_headlen(skb);
1768         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1769         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1770
1771         /* Packet is any nonTSO type
1772          *
1773          * Copy as much as possible skb->data to immediate data and
1774          * the rest to sg1entry
1775          */
1776         if (skb_data_size >= SWQE2_MAX_IMM) {
1777                 /* copy immediate data */
1778                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1779
1780                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1781
1782                 if (skb_data_size > SWQE2_MAX_IMM) {
1783                         /* copy sg1entry data */
1784                         sg1entry->l_key = lkey;
1785                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1786                         sg1entry->vaddr =
1787                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1788                         swqe->descriptors++;
1789                 }
1790         } else {
1791                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1792                 swqe->immediate_data_length = skb_data_size;
1793         }
1794 }
1795
1796 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1797                                     struct ehea_swqe *swqe, u32 lkey)
1798 {
1799         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1800         skb_frag_t *frag;
1801         int nfrags, sg1entry_contains_frag_data, i;
1802
1803         nfrags = skb_shinfo(skb)->nr_frags;
1804         sg1entry = &swqe->u.immdata_desc.sg_entry;
1805         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1806         swqe->descriptors = 0;
1807         sg1entry_contains_frag_data = 0;
1808
1809         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1810                 write_swqe2_TSO(skb, swqe, lkey);
1811         else
1812                 write_swqe2_nonTSO(skb, swqe, lkey);
1813
1814         /* write descriptors */
1815         if (nfrags > 0) {
1816                 if (swqe->descriptors == 0) {
1817                         /* sg1entry not yet used */
1818                         frag = &skb_shinfo(skb)->frags[0];
1819
1820                         /* copy sg1entry data */
1821                         sg1entry->l_key = lkey;
1822                         sg1entry->len = frag->size;
1823                         sg1entry->vaddr =
1824                                 ehea_map_vaddr(page_address(frag->page)
1825                                                + frag->page_offset);
1826                         swqe->descriptors++;
1827                         sg1entry_contains_frag_data = 1;
1828                 }
1829
1830                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1831
1832                         frag = &skb_shinfo(skb)->frags[i];
1833                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1834
1835                         sgentry->l_key = lkey;
1836                         sgentry->len = frag->size;
1837                         sgentry->vaddr =
1838                                 ehea_map_vaddr(page_address(frag->page)
1839                                                + frag->page_offset);
1840                         swqe->descriptors++;
1841                 }
1842         }
1843 }
1844
1845 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1846 {
1847         int ret = 0;
1848         u64 hret;
1849         u8 reg_type;
1850
1851         /* De/Register untagged packets */
1852         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1853         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1854                                      port->logical_port_id,
1855                                      reg_type, port->mac_addr, 0, hcallid);
1856         if (hret != H_SUCCESS) {
1857                 pr_err("%sregistering bc address failed (tagged)\n",
1858                        hcallid == H_REG_BCMC ? "" : "de");
1859                 ret = -EIO;
1860                 goto out_herr;
1861         }
1862
1863         /* De/Register VLAN packets */
1864         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1865         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1866                                      port->logical_port_id,
1867                                      reg_type, port->mac_addr, 0, hcallid);
1868         if (hret != H_SUCCESS) {
1869                 pr_err("%sregistering bc address failed (vlan)\n",
1870                        hcallid == H_REG_BCMC ? "" : "de");
1871                 ret = -EIO;
1872         }
1873 out_herr:
1874         return ret;
1875 }
1876
1877 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1878 {
1879         struct ehea_port *port = netdev_priv(dev);
1880         struct sockaddr *mac_addr = sa;
1881         struct hcp_ehea_port_cb0 *cb0;
1882         int ret;
1883         u64 hret;
1884
1885         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1886                 ret = -EADDRNOTAVAIL;
1887                 goto out;
1888         }
1889
1890         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1891         if (!cb0) {
1892                 pr_err("no mem for cb0\n");
1893                 ret = -ENOMEM;
1894                 goto out;
1895         }
1896
1897         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1898
1899         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1900
1901         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1902                                        port->logical_port_id, H_PORT_CB0,
1903                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1904         if (hret != H_SUCCESS) {
1905                 ret = -EIO;
1906                 goto out_free;
1907         }
1908
1909         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1910
1911         /* Deregister old MAC in pHYP */
1912         if (port->state == EHEA_PORT_UP) {
1913                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1914                 if (ret)
1915                         goto out_upregs;
1916         }
1917
1918         port->mac_addr = cb0->port_mac_addr << 16;
1919
1920         /* Register new MAC in pHYP */
1921         if (port->state == EHEA_PORT_UP) {
1922                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1923                 if (ret)
1924                         goto out_upregs;
1925         }
1926
1927         ret = 0;
1928
1929 out_upregs:
1930         ehea_update_bcmc_registrations();
1931 out_free:
1932         free_page((unsigned long)cb0);
1933 out:
1934         return ret;
1935 }
1936
1937 static void ehea_promiscuous_error(u64 hret, int enable)
1938 {
1939         if (hret == H_AUTHORITY)
1940                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1941                         enable == 1 ? "en" : "dis");
1942         else
1943                 pr_err("failed %sabling promiscuous mode\n",
1944                        enable == 1 ? "en" : "dis");
1945 }
1946
1947 static void ehea_promiscuous(struct net_device *dev, int enable)
1948 {
1949         struct ehea_port *port = netdev_priv(dev);
1950         struct hcp_ehea_port_cb7 *cb7;
1951         u64 hret;
1952
1953         if (enable == port->promisc)
1954                 return;
1955
1956         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1957         if (!cb7) {
1958                 pr_err("no mem for cb7\n");
1959                 goto out;
1960         }
1961
1962         /* Modify Pxs_DUCQPN in CB7 */
1963         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1964
1965         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1966                                        port->logical_port_id,
1967                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1968         if (hret) {
1969                 ehea_promiscuous_error(hret, enable);
1970                 goto out;
1971         }
1972
1973         port->promisc = enable;
1974 out:
1975         free_page((unsigned long)cb7);
1976 }
1977
1978 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1979                                      u32 hcallid)
1980 {
1981         u64 hret;
1982         u8 reg_type;
1983
1984         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1985                  | EHEA_BCMC_UNTAGGED;
1986
1987         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1988                                      port->logical_port_id,
1989                                      reg_type, mc_mac_addr, 0, hcallid);
1990         if (hret)
1991                 goto out;
1992
1993         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1994                  | EHEA_BCMC_VLANID_ALL;
1995
1996         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1997                                      port->logical_port_id,
1998                                      reg_type, mc_mac_addr, 0, hcallid);
1999 out:
2000         return hret;
2001 }
2002
2003 static int ehea_drop_multicast_list(struct net_device *dev)
2004 {
2005         struct ehea_port *port = netdev_priv(dev);
2006         struct ehea_mc_list *mc_entry = port->mc_list;
2007         struct list_head *pos;
2008         struct list_head *temp;
2009         int ret = 0;
2010         u64 hret;
2011
2012         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
2013                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
2014
2015                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
2016                                                  H_DEREG_BCMC);
2017                 if (hret) {
2018                         pr_err("failed deregistering mcast MAC\n");
2019                         ret = -EIO;
2020                 }
2021
2022                 list_del(pos);
2023                 kfree(mc_entry);
2024         }
2025         return ret;
2026 }
2027
2028 static void ehea_allmulti(struct net_device *dev, int enable)
2029 {
2030         struct ehea_port *port = netdev_priv(dev);
2031         u64 hret;
2032
2033         if (!port->allmulti) {
2034                 if (enable) {
2035                         /* Enable ALLMULTI */
2036                         ehea_drop_multicast_list(dev);
2037                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
2038                         if (!hret)
2039                                 port->allmulti = 1;
2040                         else
2041                                 netdev_err(dev,
2042                                            "failed enabling IFF_ALLMULTI\n");
2043                 }
2044         } else
2045                 if (!enable) {
2046                         /* Disable ALLMULTI */
2047                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
2048                         if (!hret)
2049                                 port->allmulti = 0;
2050                         else
2051                                 netdev_err(dev,
2052                                            "failed disabling IFF_ALLMULTI\n");
2053                 }
2054 }
2055
2056 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
2057 {
2058         struct ehea_mc_list *ehea_mcl_entry;
2059         u64 hret;
2060
2061         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
2062         if (!ehea_mcl_entry) {
2063                 pr_err("no mem for mcl_entry\n");
2064                 return;
2065         }
2066
2067         INIT_LIST_HEAD(&ehea_mcl_entry->list);
2068
2069         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
2070
2071         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
2072                                          H_REG_BCMC);
2073         if (!hret)
2074                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
2075         else {
2076                 pr_err("failed registering mcast MAC\n");
2077                 kfree(ehea_mcl_entry);
2078         }
2079 }
2080
2081 static void ehea_set_multicast_list(struct net_device *dev)
2082 {
2083         struct ehea_port *port = netdev_priv(dev);
2084         struct netdev_hw_addr *ha;
2085         int ret;
2086
2087         if (dev->flags & IFF_PROMISC) {
2088                 ehea_promiscuous(dev, 1);
2089                 return;
2090         }
2091         ehea_promiscuous(dev, 0);
2092
2093         if (dev->flags & IFF_ALLMULTI) {
2094                 ehea_allmulti(dev, 1);
2095                 goto out;
2096         }
2097         ehea_allmulti(dev, 0);
2098
2099         if (!netdev_mc_empty(dev)) {
2100                 ret = ehea_drop_multicast_list(dev);
2101                 if (ret) {
2102                         /* Dropping the current multicast list failed.
2103                          * Enabling ALL_MULTI is the best we can do.
2104                          */
2105                         ehea_allmulti(dev, 1);
2106                 }
2107
2108                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2109                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
2110                                 port->adapter->max_mc_mac);
2111                         goto out;
2112                 }
2113
2114                 netdev_for_each_mc_addr(ha, dev)
2115                         ehea_add_multicast_entry(port, ha->addr);
2116
2117         }
2118 out:
2119         ehea_update_bcmc_registrations();
2120 }
2121
2122 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2123 {
2124         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2125                 return -EINVAL;
2126         dev->mtu = new_mtu;
2127         return 0;
2128 }
2129
2130 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2131                        struct ehea_swqe *swqe, u32 lkey)
2132 {
2133         if (skb->protocol == htons(ETH_P_IP)) {
2134                 const struct iphdr *iph = ip_hdr(skb);
2135
2136                 /* IPv4 */
2137                 swqe->tx_control |= EHEA_SWQE_CRC
2138                                  | EHEA_SWQE_IP_CHECKSUM
2139                                  | EHEA_SWQE_TCP_CHECKSUM
2140                                  | EHEA_SWQE_IMM_DATA_PRESENT
2141                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2142
2143                 write_ip_start_end(swqe, skb);
2144
2145                 if (iph->protocol == IPPROTO_UDP) {
2146                         if ((iph->frag_off & IP_MF) ||
2147                             (iph->frag_off & IP_OFFSET))
2148                                 /* IP fragment, so don't change cs */
2149                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2150                         else
2151                                 write_udp_offset_end(swqe, skb);
2152                 } else if (iph->protocol == IPPROTO_TCP) {
2153                         write_tcp_offset_end(swqe, skb);
2154                 }
2155
2156                 /* icmp (big data) and ip segmentation packets (all other ip
2157                    packets) do not require any special handling */
2158
2159         } else {
2160                 /* Other Ethernet Protocol */
2161                 swqe->tx_control |= EHEA_SWQE_CRC
2162                                  | EHEA_SWQE_IMM_DATA_PRESENT
2163                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2164         }
2165
2166         write_swqe2_data(skb, dev, swqe, lkey);
2167 }
2168
2169 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2170                        struct ehea_swqe *swqe)
2171 {
2172         int nfrags = skb_shinfo(skb)->nr_frags;
2173         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2174         skb_frag_t *frag;
2175         int i;
2176
2177         if (skb->protocol == htons(ETH_P_IP)) {
2178                 const struct iphdr *iph = ip_hdr(skb);
2179
2180                 /* IPv4 */
2181                 write_ip_start_end(swqe, skb);
2182
2183                 if (iph->protocol == IPPROTO_TCP) {
2184                         swqe->tx_control |= EHEA_SWQE_CRC
2185                                          | EHEA_SWQE_IP_CHECKSUM
2186                                          | EHEA_SWQE_TCP_CHECKSUM
2187                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2188
2189                         write_tcp_offset_end(swqe, skb);
2190
2191                 } else if (iph->protocol == IPPROTO_UDP) {
2192                         if ((iph->frag_off & IP_MF) ||
2193                             (iph->frag_off & IP_OFFSET))
2194                                 /* IP fragment, so don't change cs */
2195                                 swqe->tx_control |= EHEA_SWQE_CRC
2196                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2197                         else {
2198                                 swqe->tx_control |= EHEA_SWQE_CRC
2199                                                  | EHEA_SWQE_IP_CHECKSUM
2200                                                  | EHEA_SWQE_TCP_CHECKSUM
2201                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2202
2203                                 write_udp_offset_end(swqe, skb);
2204                         }
2205                 } else {
2206                         /* icmp (big data) and
2207                            ip segmentation packets (all other ip packets) */
2208                         swqe->tx_control |= EHEA_SWQE_CRC
2209                                          | EHEA_SWQE_IP_CHECKSUM
2210                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2211                 }
2212         } else {
2213                 /* Other Ethernet Protocol */
2214                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2215         }
2216         /* copy (immediate) data */
2217         if (nfrags == 0) {
2218                 /* data is in a single piece */
2219                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2220         } else {
2221                 /* first copy data from the skb->data buffer ... */
2222                 skb_copy_from_linear_data(skb, imm_data,
2223                                           skb_headlen(skb));
2224                 imm_data += skb_headlen(skb);
2225
2226                 /* ... then copy data from the fragments */
2227                 for (i = 0; i < nfrags; i++) {
2228                         frag = &skb_shinfo(skb)->frags[i];
2229                         memcpy(imm_data,
2230                                page_address(frag->page) + frag->page_offset,
2231                                frag->size);
2232                         imm_data += frag->size;
2233                 }
2234         }
2235         swqe->immediate_data_length = skb->len;
2236         dev_kfree_skb(skb);
2237 }
2238
2239 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2240 {
2241         struct tcphdr *tcp;
2242         u32 tmp;
2243
2244         if ((skb->protocol == htons(ETH_P_IP)) &&
2245             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2246                 tcp = (struct tcphdr *)(skb_network_header(skb) +
2247                                         (ip_hdr(skb)->ihl * 4));
2248                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2249                 tmp += ip_hdr(skb)->daddr % 31;
2250                 return tmp % num_qps;
2251         } else
2252                 return 0;
2253 }
2254
2255 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2256 {
2257         struct ehea_port *port = netdev_priv(dev);
2258         struct ehea_swqe *swqe;
2259         unsigned long flags;
2260         u32 lkey;
2261         int swqe_index;
2262         struct ehea_port_res *pr;
2263
2264         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2265
2266         if (!spin_trylock(&pr->xmit_lock))
2267                 return NETDEV_TX_BUSY;
2268
2269         if (pr->queue_stopped) {
2270                 spin_unlock(&pr->xmit_lock);
2271                 return NETDEV_TX_BUSY;
2272         }
2273
2274         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2275         memset(swqe, 0, SWQE_HEADER_SIZE);
2276         atomic_dec(&pr->swqe_avail);
2277
2278         if (vlan_tx_tag_present(skb)) {
2279                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2280                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2281         }
2282
2283         pr->tx_packets++;
2284         pr->tx_bytes += skb->len;
2285
2286         if (skb->len <= SWQE3_MAX_IMM) {
2287                 u32 sig_iv = port->sig_comp_iv;
2288                 u32 swqe_num = pr->swqe_id_counter;
2289                 ehea_xmit3(skb, dev, swqe);
2290                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2291                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2292                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2293                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2294                                                       sig_iv);
2295                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2296                         pr->swqe_ll_count = 0;
2297                 } else
2298                         pr->swqe_ll_count += 1;
2299         } else {
2300                 swqe->wr_id =
2301                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2302                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2303                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2304                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2305                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2306
2307                 pr->sq_skba.index++;
2308                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2309
2310                 lkey = pr->send_mr.lkey;
2311                 ehea_xmit2(skb, dev, swqe, lkey);
2312                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2313         }
2314         pr->swqe_id_counter += 1;
2315
2316         netif_info(port, tx_queued, dev,
2317                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2318         if (netif_msg_tx_queued(port))
2319                 ehea_dump(swqe, 512, "swqe");
2320
2321         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2322                 netif_stop_queue(dev);
2323                 swqe->tx_control |= EHEA_SWQE_PURGE;
2324         }
2325
2326         ehea_post_swqe(pr->qp, swqe);
2327
2328         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2329                 spin_lock_irqsave(&pr->netif_queue, flags);
2330                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2331                         pr->p_stats.queue_stopped++;
2332                         netif_stop_queue(dev);
2333                         pr->queue_stopped = 1;
2334                 }
2335                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2336         }
2337         dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
2338         spin_unlock(&pr->xmit_lock);
2339
2340         return NETDEV_TX_OK;
2341 }
2342
2343 static void ehea_vlan_rx_register(struct net_device *dev,
2344                                   struct vlan_group *grp)
2345 {
2346         struct ehea_port *port = netdev_priv(dev);
2347         struct ehea_adapter *adapter = port->adapter;
2348         struct hcp_ehea_port_cb1 *cb1;
2349         u64 hret;
2350
2351         port->vgrp = grp;
2352
2353         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2354         if (!cb1) {
2355                 pr_err("no mem for cb1\n");
2356                 goto out;
2357         }
2358
2359         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2360                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2361         if (hret != H_SUCCESS)
2362                 pr_err("modify_ehea_port failed\n");
2363
2364         free_page((unsigned long)cb1);
2365 out:
2366         return;
2367 }
2368
2369 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2370 {
2371         struct ehea_port *port = netdev_priv(dev);
2372         struct ehea_adapter *adapter = port->adapter;
2373         struct hcp_ehea_port_cb1 *cb1;
2374         int index;
2375         u64 hret;
2376
2377         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2378         if (!cb1) {
2379                 pr_err("no mem for cb1\n");
2380                 goto out;
2381         }
2382
2383         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2384                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2385         if (hret != H_SUCCESS) {
2386                 pr_err("query_ehea_port failed\n");
2387                 goto out;
2388         }
2389
2390         index = (vid / 64);
2391         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2392
2393         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2394                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2395         if (hret != H_SUCCESS)
2396                 pr_err("modify_ehea_port failed\n");
2397 out:
2398         free_page((unsigned long)cb1);
2399         return;
2400 }
2401
2402 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2403 {
2404         struct ehea_port *port = netdev_priv(dev);
2405         struct ehea_adapter *adapter = port->adapter;
2406         struct hcp_ehea_port_cb1 *cb1;
2407         int index;
2408         u64 hret;
2409
2410         vlan_group_set_device(port->vgrp, vid, NULL);
2411
2412         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2413         if (!cb1) {
2414                 pr_err("no mem for cb1\n");
2415                 goto out;
2416         }
2417
2418         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2419                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2420         if (hret != H_SUCCESS) {
2421                 pr_err("query_ehea_port failed\n");
2422                 goto out;
2423         }
2424
2425         index = (vid / 64);
2426         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2427
2428         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2429                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2430         if (hret != H_SUCCESS)
2431                 pr_err("modify_ehea_port failed\n");
2432 out:
2433         free_page((unsigned long)cb1);
2434 }
2435
2436 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2437 {
2438         int ret = -EIO;
2439         u64 hret;
2440         u16 dummy16 = 0;
2441         u64 dummy64 = 0;
2442         struct hcp_modify_qp_cb0 *cb0;
2443
2444         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2445         if (!cb0) {
2446                 ret = -ENOMEM;
2447                 goto out;
2448         }
2449
2450         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2451                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2452         if (hret != H_SUCCESS) {
2453                 pr_err("query_ehea_qp failed (1)\n");
2454                 goto out;
2455         }
2456
2457         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2458         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2459                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2460                                      &dummy64, &dummy64, &dummy16, &dummy16);
2461         if (hret != H_SUCCESS) {
2462                 pr_err("modify_ehea_qp failed (1)\n");
2463                 goto out;
2464         }
2465
2466         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2467                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2468         if (hret != H_SUCCESS) {
2469                 pr_err("query_ehea_qp failed (2)\n");
2470                 goto out;
2471         }
2472
2473         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2474         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2475                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2476                                      &dummy64, &dummy64, &dummy16, &dummy16);
2477         if (hret != H_SUCCESS) {
2478                 pr_err("modify_ehea_qp failed (2)\n");
2479                 goto out;
2480         }
2481
2482         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2483                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2484         if (hret != H_SUCCESS) {
2485                 pr_err("query_ehea_qp failed (3)\n");
2486                 goto out;
2487         }
2488
2489         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2490         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2491                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2492                                      &dummy64, &dummy64, &dummy16, &dummy16);
2493         if (hret != H_SUCCESS) {
2494                 pr_err("modify_ehea_qp failed (3)\n");
2495                 goto out;
2496         }
2497
2498         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2499                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2500         if (hret != H_SUCCESS) {
2501                 pr_err("query_ehea_qp failed (4)\n");
2502                 goto out;
2503         }
2504
2505         ret = 0;
2506 out:
2507         free_page((unsigned long)cb0);
2508         return ret;
2509 }
2510
2511 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2512                                int add_tx_qps)
2513 {
2514         int ret, i;
2515         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2516         enum ehea_eq_type eq_type = EHEA_EQ;
2517
2518         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2519                                    EHEA_MAX_ENTRIES_EQ, 1);
2520         if (!port->qp_eq) {
2521                 ret = -EINVAL;
2522                 pr_err("ehea_create_eq failed (qp_eq)\n");
2523                 goto out_kill_eq;
2524         }
2525
2526         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2527         pr_cfg.max_entries_scq = sq_entries * 2;
2528         pr_cfg.max_entries_sq = sq_entries;
2529         pr_cfg.max_entries_rq1 = rq1_entries;
2530         pr_cfg.max_entries_rq2 = rq2_entries;
2531         pr_cfg.max_entries_rq3 = rq3_entries;
2532
2533         pr_cfg_small_rx.max_entries_rcq = 1;
2534         pr_cfg_small_rx.max_entries_scq = sq_entries;
2535         pr_cfg_small_rx.max_entries_sq = sq_entries;
2536         pr_cfg_small_rx.max_entries_rq1 = 1;
2537         pr_cfg_small_rx.max_entries_rq2 = 1;
2538         pr_cfg_small_rx.max_entries_rq3 = 1;
2539
2540         for (i = 0; i < def_qps; i++) {
2541                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2542                 if (ret)
2543                         goto out_clean_pr;
2544         }
2545         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2546                 ret = ehea_init_port_res(port, &port->port_res[i],
2547                                          &pr_cfg_small_rx, i);
2548                 if (ret)
2549                         goto out_clean_pr;
2550         }
2551
2552         return 0;
2553
2554 out_clean_pr:
2555         while (--i >= 0)
2556                 ehea_clean_portres(port, &port->port_res[i]);
2557
2558 out_kill_eq:
2559         ehea_destroy_eq(port->qp_eq);
2560         return ret;
2561 }
2562
2563 static int ehea_clean_all_portres(struct ehea_port *port)
2564 {
2565         int ret = 0;
2566         int i;
2567
2568         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2569                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2570
2571         ret |= ehea_destroy_eq(port->qp_eq);
2572
2573         return ret;
2574 }
2575
2576 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2577 {
2578         if (adapter->active_ports)
2579                 return;
2580
2581         ehea_rem_mr(&adapter->mr);
2582 }
2583
2584 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2585 {
2586         if (adapter->active_ports)
2587                 return 0;
2588
2589         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2590 }
2591
2592 static int ehea_up(struct net_device *dev)
2593 {
2594         int ret, i;
2595         struct ehea_port *port = netdev_priv(dev);
2596
2597         if (port->state == EHEA_PORT_UP)
2598                 return 0;
2599
2600         ret = ehea_port_res_setup(port, port->num_def_qps,
2601                                   port->num_add_tx_qps);
2602         if (ret) {
2603                 netdev_err(dev, "port_res_failed\n");
2604                 goto out;
2605         }
2606
2607         /* Set default QP for this port */
2608         ret = ehea_configure_port(port);
2609         if (ret) {
2610                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2611                 goto out_clean_pr;
2612         }
2613
2614         ret = ehea_reg_interrupts(dev);
2615         if (ret) {
2616                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2617                 goto out_clean_pr;
2618         }
2619
2620         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2621                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2622                 if (ret) {
2623                         netdev_err(dev, "activate_qp failed\n");
2624                         goto out_free_irqs;
2625                 }
2626         }
2627
2628         for (i = 0; i < port->num_def_qps; i++) {
2629                 ret = ehea_fill_port_res(&port->port_res[i]);
2630                 if (ret) {
2631                         netdev_err(dev, "out_free_irqs\n");
2632                         goto out_free_irqs;
2633                 }
2634         }
2635
2636         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2637         if (ret) {
2638                 ret = -EIO;
2639                 goto out_free_irqs;
2640         }
2641
2642         port->state = EHEA_PORT_UP;
2643
2644         ret = 0;
2645         goto out;
2646
2647 out_free_irqs:
2648         ehea_free_interrupts(dev);
2649
2650 out_clean_pr:
2651         ehea_clean_all_portres(port);
2652 out:
2653         if (ret)
2654                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2655
2656         ehea_update_bcmc_registrations();
2657         ehea_update_firmware_handles();
2658
2659         return ret;
2660 }
2661
2662 static void port_napi_disable(struct ehea_port *port)
2663 {
2664         int i;
2665
2666         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2667                 napi_disable(&port->port_res[i].napi);
2668 }
2669
2670 static void port_napi_enable(struct ehea_port *port)
2671 {
2672         int i;
2673
2674         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2675                 napi_enable(&port->port_res[i].napi);
2676 }
2677
2678 static int ehea_open(struct net_device *dev)
2679 {
2680         int ret;
2681         struct ehea_port *port = netdev_priv(dev);
2682
2683         mutex_lock(&port->port_lock);
2684
2685         netif_info(port, ifup, dev, "enabling port\n");
2686
2687         ret = ehea_up(dev);
2688         if (!ret) {
2689                 port_napi_enable(port);
2690                 netif_start_queue(dev);
2691         }
2692
2693         init_waitqueue_head(&port->swqe_avail_wq);
2694         init_waitqueue_head(&port->restart_wq);
2695
2696         mutex_unlock(&port->port_lock);
2697
2698         return ret;
2699 }
2700
2701 static int ehea_down(struct net_device *dev)
2702 {
2703         int ret;
2704         struct ehea_port *port = netdev_priv(dev);
2705
2706         if (port->state == EHEA_PORT_DOWN)
2707                 return 0;
2708
2709         ehea_drop_multicast_list(dev);
2710         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2711
2712         ehea_free_interrupts(dev);
2713
2714         port->state = EHEA_PORT_DOWN;
2715
2716         ehea_update_bcmc_registrations();
2717
2718         ret = ehea_clean_all_portres(port);
2719         if (ret)
2720                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2721
2722         ehea_update_firmware_handles();
2723
2724         return ret;
2725 }
2726
2727 static int ehea_stop(struct net_device *dev)
2728 {
2729         int ret;
2730         struct ehea_port *port = netdev_priv(dev);
2731
2732         netif_info(port, ifdown, dev, "disabling port\n");
2733
2734         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2735         cancel_work_sync(&port->reset_task);
2736         mutex_lock(&port->port_lock);
2737         netif_stop_queue(dev);
2738         port_napi_disable(port);
2739         ret = ehea_down(dev);
2740         mutex_unlock(&port->port_lock);
2741         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2742         return ret;
2743 }
2744
2745 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2746 {
2747         struct ehea_qp qp = *orig_qp;
2748         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2749         struct ehea_swqe *swqe;
2750         int wqe_index;
2751         int i;
2752
2753         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2754                 swqe = ehea_get_swqe(&qp, &wqe_index);
2755                 swqe->tx_control |= EHEA_SWQE_PURGE;
2756         }
2757 }
2758
2759 static void ehea_flush_sq(struct ehea_port *port)
2760 {
2761         int i;
2762
2763         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2764                 struct ehea_port_res *pr = &port->port_res[i];
2765                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2766                 int ret;
2767
2768                 ret = wait_event_timeout(port->swqe_avail_wq,
2769                          atomic_read(&pr->swqe_avail) >= swqe_max,
2770                          msecs_to_jiffies(100));
2771
2772                 if (!ret) {
2773                         pr_err("WARNING: sq not flushed completely\n");
2774                         break;
2775                 }
2776         }
2777 }
2778
2779 int ehea_stop_qps(struct net_device *dev)
2780 {
2781         struct ehea_port *port = netdev_priv(dev);
2782         struct ehea_adapter *adapter = port->adapter;
2783         struct hcp_modify_qp_cb0 *cb0;
2784         int ret = -EIO;
2785         int dret;
2786         int i;
2787         u64 hret;
2788         u64 dummy64 = 0;
2789         u16 dummy16 = 0;
2790
2791         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2792         if (!cb0) {
2793                 ret = -ENOMEM;
2794                 goto out;
2795         }
2796
2797         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2798                 struct ehea_port_res *pr =  &port->port_res[i];
2799                 struct ehea_qp *qp = pr->qp;
2800
2801                 /* Purge send queue */
2802                 ehea_purge_sq(qp);
2803
2804                 /* Disable queue pair */
2805                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2806                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2807                                             cb0);
2808                 if (hret != H_SUCCESS) {
2809                         pr_err("query_ehea_qp failed (1)\n");
2810                         goto out;
2811                 }
2812
2813                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2814                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2815
2816                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2817                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2818                                                             1), cb0, &dummy64,
2819                                              &dummy64, &dummy16, &dummy16);
2820                 if (hret != H_SUCCESS) {
2821                         pr_err("modify_ehea_qp failed (1)\n");
2822                         goto out;
2823                 }
2824
2825                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2826                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2827                                             cb0);
2828                 if (hret != H_SUCCESS) {
2829                         pr_err("query_ehea_qp failed (2)\n");
2830                         goto out;
2831                 }
2832
2833                 /* deregister shared memory regions */
2834                 dret = ehea_rem_smrs(pr);
2835                 if (dret) {
2836                         pr_err("unreg shared memory region failed\n");
2837                         goto out;
2838                 }
2839         }
2840
2841         ret = 0;
2842 out:
2843         free_page((unsigned long)cb0);
2844
2845         return ret;
2846 }
2847
2848 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2849 {
2850         struct ehea_qp qp = *orig_qp;
2851         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2852         struct ehea_rwqe *rwqe;
2853         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2854         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2855         struct sk_buff *skb;
2856         u32 lkey = pr->recv_mr.lkey;
2857
2858
2859         int i;
2860         int index;
2861
2862         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2863                 rwqe = ehea_get_next_rwqe(&qp, 2);
2864                 rwqe->sg_list[0].l_key = lkey;
2865                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2866                 skb = skba_rq2[index];
2867                 if (skb)
2868                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2869         }
2870
2871         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2872                 rwqe = ehea_get_next_rwqe(&qp, 3);
2873                 rwqe->sg_list[0].l_key = lkey;
2874                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2875                 skb = skba_rq3[index];
2876                 if (skb)
2877                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2878         }
2879 }
2880
2881 int ehea_restart_qps(struct net_device *dev)
2882 {
2883         struct ehea_port *port = netdev_priv(dev);
2884         struct ehea_adapter *adapter = port->adapter;
2885         int ret = 0;
2886         int i;
2887
2888         struct hcp_modify_qp_cb0 *cb0;
2889         u64 hret;
2890         u64 dummy64 = 0;
2891         u16 dummy16 = 0;
2892
2893         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2894         if (!cb0) {
2895                 ret = -ENOMEM;
2896                 goto out;
2897         }
2898
2899         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2900                 struct ehea_port_res *pr =  &port->port_res[i];
2901                 struct ehea_qp *qp = pr->qp;
2902
2903                 ret = ehea_gen_smrs(pr);
2904                 if (ret) {
2905                         netdev_err(dev, "creation of shared memory regions failed\n");
2906                         goto out;
2907                 }
2908
2909                 ehea_update_rqs(qp, pr);
2910
2911                 /* Enable queue pair */
2912                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2913                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2914                                             cb0);
2915                 if (hret != H_SUCCESS) {
2916                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2917                         goto out;
2918                 }
2919
2920                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2921                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2922
2923                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2924                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2925                                                             1), cb0, &dummy64,
2926                                              &dummy64, &dummy16, &dummy16);
2927                 if (hret != H_SUCCESS) {
2928                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2929                         goto out;
2930                 }
2931
2932                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2933                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2934                                             cb0);
2935                 if (hret != H_SUCCESS) {
2936                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2937                         goto out;
2938                 }
2939
2940                 /* refill entire queue */
2941                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2942                 ehea_refill_rq2(pr, 0);
2943                 ehea_refill_rq3(pr, 0);
2944         }
2945 out:
2946         free_page((unsigned long)cb0);
2947
2948         return ret;
2949 }
2950
2951 static void ehea_reset_port(struct work_struct *work)
2952 {
2953         int ret;
2954         struct ehea_port *port =
2955                 container_of(work, struct ehea_port, reset_task);
2956         struct net_device *dev = port->netdev;
2957
2958         mutex_lock(&dlpar_mem_lock);
2959         port->resets++;
2960         mutex_lock(&port->port_lock);
2961         netif_stop_queue(dev);
2962
2963         port_napi_disable(port);
2964
2965         ehea_down(dev);
2966
2967         ret = ehea_up(dev);
2968         if (ret)
2969                 goto out;
2970
2971         ehea_set_multicast_list(dev);
2972
2973         netif_info(port, timer, dev, "reset successful\n");
2974
2975         port_napi_enable(port);
2976
2977         netif_wake_queue(dev);
2978 out:
2979         mutex_unlock(&port->port_lock);
2980         mutex_unlock(&dlpar_mem_lock);
2981 }
2982
2983 static void ehea_rereg_mrs(void)
2984 {
2985         int ret, i;
2986         struct ehea_adapter *adapter;
2987
2988         pr_info("LPAR memory changed - re-initializing driver\n");
2989
2990         list_for_each_entry(adapter, &adapter_list, list)
2991                 if (adapter->active_ports) {
2992                         /* Shutdown all ports */
2993                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2994                                 struct ehea_port *port = adapter->port[i];
2995                                 struct net_device *dev;
2996
2997                                 if (!port)
2998                                         continue;
2999
3000                                 dev = port->netdev;
3001
3002                                 if (dev->flags & IFF_UP) {
3003                                         mutex_lock(&port->port_lock);
3004                                         netif_stop_queue(dev);
3005                                         ehea_flush_sq(port);
3006                                         ret = ehea_stop_qps(dev);
3007                                         if (ret) {
3008                                                 mutex_unlock(&port->port_lock);
3009                                                 goto out;
3010                                         }
3011                                         port_napi_disable(port);
3012                                         mutex_unlock(&port->port_lock);
3013                                 }
3014                                 reset_sq_restart_flag(port);
3015                         }
3016
3017                         /* Unregister old memory region */
3018                         ret = ehea_rem_mr(&adapter->mr);
3019                         if (ret) {
3020                                 pr_err("unregister MR failed - driver inoperable!\n");
3021                                 goto out;
3022                         }
3023                 }
3024
3025         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3026
3027         list_for_each_entry(adapter, &adapter_list, list)
3028                 if (adapter->active_ports) {
3029                         /* Register new memory region */
3030                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
3031                         if (ret) {
3032                                 pr_err("register MR failed - driver inoperable!\n");
3033                                 goto out;
3034                         }
3035
3036                         /* Restart all ports */
3037                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
3038                                 struct ehea_port *port = adapter->port[i];
3039
3040                                 if (port) {
3041                                         struct net_device *dev = port->netdev;
3042
3043                                         if (dev->flags & IFF_UP) {
3044                                                 mutex_lock(&port->port_lock);
3045                                                 port_napi_enable(port);
3046                                                 ret = ehea_restart_qps(dev);
3047                                                 check_sqs(port);
3048                                                 if (!ret)
3049                                                         netif_wake_queue(dev);
3050                                                 mutex_unlock(&port->port_lock);
3051                                         }
3052                                 }
3053                         }
3054                 }
3055         pr_info("re-initializing driver complete\n");
3056 out:
3057         return;
3058 }
3059
3060 static void ehea_tx_watchdog(struct net_device *dev)
3061 {
3062         struct ehea_port *port = netdev_priv(dev);
3063
3064         if (netif_carrier_ok(dev) &&
3065             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
3066                 ehea_schedule_port_reset(port);
3067 }
3068
3069 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
3070 {
3071         struct hcp_query_ehea *cb;
3072         u64 hret;
3073         int ret;
3074
3075         cb = (void *)get_zeroed_page(GFP_KERNEL);
3076         if (!cb) {
3077                 ret = -ENOMEM;
3078                 goto out;
3079         }
3080
3081         hret = ehea_h_query_ehea(adapter->handle, cb);
3082
3083         if (hret != H_SUCCESS) {
3084                 ret = -EIO;
3085                 goto out_herr;
3086         }
3087
3088         adapter->max_mc_mac = cb->max_mc_mac - 1;
3089         ret = 0;
3090
3091 out_herr:
3092         free_page((unsigned long)cb);
3093 out:
3094         return ret;
3095 }
3096
3097 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3098 {
3099         struct hcp_ehea_port_cb4 *cb4;
3100         u64 hret;
3101         int ret = 0;
3102
3103         *jumbo = 0;
3104
3105         /* (Try to) enable *jumbo frames */
3106         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3107         if (!cb4) {
3108                 pr_err("no mem for cb4\n");
3109                 ret = -ENOMEM;
3110                 goto out;
3111         } else {
3112                 hret = ehea_h_query_ehea_port(port->adapter->handle,
3113                                               port->logical_port_id,
3114                                               H_PORT_CB4,
3115                                               H_PORT_CB4_JUMBO, cb4);
3116                 if (hret == H_SUCCESS) {
3117                         if (cb4->jumbo_frame)
3118                                 *jumbo = 1;
3119                         else {
3120                                 cb4->jumbo_frame = 1;
3121                                 hret = ehea_h_modify_ehea_port(port->adapter->
3122                                                                handle,
3123                                                                port->
3124                                                                logical_port_id,
3125                                                                H_PORT_CB4,
3126                                                                H_PORT_CB4_JUMBO,
3127                                                                cb4);
3128                                 if (hret == H_SUCCESS)
3129                                         *jumbo = 1;
3130                         }
3131                 } else
3132                         ret = -EINVAL;
3133
3134                 free_page((unsigned long)cb4);
3135         }
3136 out:
3137         return ret;
3138 }
3139
3140 static ssize_t ehea_show_port_id(struct device *dev,
3141                                  struct device_attribute *attr, char *buf)
3142 {
3143         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3144         return sprintf(buf, "%d", port->logical_port_id);
3145 }
3146
3147 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3148                    NULL);
3149
3150 static void __devinit logical_port_release(struct device *dev)
3151 {
3152         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3153         of_node_put(port->ofdev.dev.of_node);
3154 }
3155
3156 static struct device *ehea_register_port(struct ehea_port *port,
3157                                          struct device_node *dn)
3158 {
3159         int ret;
3160
3161         port->ofdev.dev.of_node = of_node_get(dn);
3162         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3163         port->ofdev.dev.bus = &ibmebus_bus_type;
3164
3165         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3166         port->ofdev.dev.release = logical_port_release;
3167
3168         ret = of_device_register(&port->ofdev);
3169         if (ret) {
3170                 pr_err("failed to register device. ret=%d\n", ret);
3171                 goto out;
3172         }
3173
3174         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3175         if (ret) {
3176                 pr_err("failed to register attributes, ret=%d\n", ret);
3177                 goto out_unreg_of_dev;
3178         }
3179
3180         return &port->ofdev.dev;
3181
3182 out_unreg_of_dev:
3183         of_device_unregister(&port->ofdev);
3184 out:
3185         return NULL;
3186 }
3187
3188 static void ehea_unregister_port(struct ehea_port *port)
3189 {
3190         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3191         of_device_unregister(&port->ofdev);
3192 }
3193
3194 static const struct net_device_ops ehea_netdev_ops = {
3195         .ndo_open               = ehea_open,
3196         .ndo_stop               = ehea_stop,
3197         .ndo_start_xmit         = ehea_start_xmit,
3198 #ifdef CONFIG_NET_POLL_CONTROLLER
3199         .ndo_poll_controller    = ehea_netpoll,
3200 #endif
3201         .ndo_get_stats          = ehea_get_stats,
3202         .ndo_set_mac_address    = ehea_set_mac_addr,
3203         .ndo_validate_addr      = eth_validate_addr,
3204         .ndo_set_multicast_list = ehea_set_multicast_list,
3205         .ndo_change_mtu         = ehea_change_mtu,
3206         .ndo_vlan_rx_register   = ehea_vlan_rx_register,
3207         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3208         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3209         .ndo_tx_timeout         = ehea_tx_watchdog,
3210 };
3211
3212 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3213                                          u32 logical_port_id,
3214                                          struct device_node *dn)
3215 {
3216         int ret;
3217         struct net_device *dev;
3218         struct ehea_port *port;
3219         struct device *port_dev;
3220         int jumbo;
3221
3222         /* allocate memory for the port structures */
3223         dev = alloc_etherdev(sizeof(struct ehea_port));
3224
3225         if (!dev) {
3226                 pr_err("no mem for net_device\n");
3227                 ret = -ENOMEM;
3228                 goto out_err;
3229         }
3230
3231         port = netdev_priv(dev);
3232
3233         mutex_init(&port->port_lock);
3234         port->state = EHEA_PORT_DOWN;
3235         port->sig_comp_iv = sq_entries / 10;
3236
3237         port->adapter = adapter;
3238         port->netdev = dev;
3239         port->logical_port_id = logical_port_id;
3240
3241         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3242
3243         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3244         if (!port->mc_list) {
3245                 ret = -ENOMEM;
3246                 goto out_free_ethdev;
3247         }
3248
3249         INIT_LIST_HEAD(&port->mc_list->list);
3250
3251         ret = ehea_sense_port_attr(port);
3252         if (ret)
3253                 goto out_free_mc_list;
3254
3255         port_dev = ehea_register_port(port, dn);
3256         if (!port_dev)
3257                 goto out_free_mc_list;
3258
3259         SET_NETDEV_DEV(dev, port_dev);
3260
3261         /* initialize net_device structure */
3262         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3263
3264         dev->netdev_ops = &ehea_netdev_ops;
3265         ehea_set_ethtool_ops(dev);
3266
3267         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3268                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3269                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3270                       | NETIF_F_LLTX;
3271         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3272
3273         if (use_lro)
3274                 dev->features |= NETIF_F_LRO;
3275
3276         INIT_WORK(&port->reset_task, ehea_reset_port);
3277
3278         ret = register_netdev(dev);
3279         if (ret) {
3280                 pr_err("register_netdev failed. ret=%d\n", ret);
3281                 goto out_unreg_port;
3282         }
3283
3284         port->lro_max_aggr = lro_max_aggr;
3285
3286         ret = ehea_get_jumboframe_status(port, &jumbo);
3287         if (ret)
3288                 netdev_err(dev, "failed determining jumbo frame status\n");
3289
3290         netdev_info(dev, "Jumbo frames are %sabled\n",
3291                     jumbo == 1 ? "en" : "dis");
3292
3293         adapter->active_ports++;
3294
3295         return port;
3296
3297 out_unreg_port:
3298         ehea_unregister_port(port);
3299
3300 out_free_mc_list:
3301         kfree(port->mc_list);
3302
3303 out_free_ethdev:
3304         free_netdev(dev);
3305
3306 out_err:
3307         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3308                logical_port_id, ret);
3309         return NULL;
3310 }
3311
3312 static void ehea_shutdown_single_port(struct ehea_port *port)
3313 {
3314         struct ehea_adapter *adapter = port->adapter;
3315
3316         cancel_work_sync(&port->reset_task);
3317         unregister_netdev(port->netdev);
3318         ehea_unregister_port(port);
3319         kfree(port->mc_list);
3320         free_netdev(port->netdev);
3321         adapter->active_ports--;
3322 }
3323
3324 static int ehea_setup_ports(struct ehea_adapter *adapter)
3325 {
3326         struct device_node *lhea_dn;
3327         struct device_node *eth_dn = NULL;
3328
3329         const u32 *dn_log_port_id;
3330         int i = 0;
3331
3332         lhea_dn = adapter->ofdev->dev.of_node;
3333         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3334
3335                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3336                                                  NULL);
3337                 if (!dn_log_port_id) {
3338                         pr_err("bad device node: eth_dn name=%s\n",
3339                                eth_dn->full_name);
3340                         continue;
3341                 }
3342
3343                 if (ehea_add_adapter_mr(adapter)) {
3344                         pr_err("creating MR failed\n");
3345                         of_node_put(eth_dn);
3346                         return -EIO;
3347                 }
3348
3349                 adapter->port[i] = ehea_setup_single_port(adapter,
3350                                                           *dn_log_port_id,
3351                                                           eth_dn);
3352                 if (adapter->port[i])
3353                         netdev_info(adapter->port[i]->netdev,
3354                                     "logical port id #%d\n", *dn_log_port_id);
3355                 else
3356                         ehea_remove_adapter_mr(adapter);
3357
3358                 i++;
3359         }
3360         return 0;
3361 }
3362
3363 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3364                                            u32 logical_port_id)
3365 {
3366         struct device_node *lhea_dn;
3367         struct device_node *eth_dn = NULL;
3368         const u32 *dn_log_port_id;
3369
3370         lhea_dn = adapter->ofdev->dev.of_node;
3371         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3372
3373                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3374                                                  NULL);
3375                 if (dn_log_port_id)
3376                         if (*dn_log_port_id == logical_port_id)
3377                                 return eth_dn;
3378         }
3379
3380         return NULL;
3381 }
3382
3383 static ssize_t ehea_probe_port(struct device *dev,
3384                                struct device_attribute *attr,
3385                                const char *buf, size_t count)
3386 {
3387         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3388         struct ehea_port *port;
3389         struct device_node *eth_dn = NULL;
3390         int i;
3391
3392         u32 logical_port_id;
3393
3394         sscanf(buf, "%d", &logical_port_id);
3395
3396         port = ehea_get_port(adapter, logical_port_id);
3397
3398         if (port) {
3399                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3400                             logical_port_id);
3401                 return -EINVAL;
3402         }
3403
3404         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3405
3406         if (!eth_dn) {
3407                 pr_info("no logical port with id %d found\n", logical_port_id);
3408                 return -EINVAL;
3409         }
3410
3411         if (ehea_add_adapter_mr(adapter)) {
3412                 pr_err("creating MR failed\n");
3413                 return -EIO;
3414         }
3415
3416         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3417
3418         of_node_put(eth_dn);
3419
3420         if (port) {
3421                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3422                         if (!adapter->port[i]) {
3423                                 adapter->port[i] = port;
3424                                 break;
3425                         }
3426
3427                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3428                             logical_port_id);
3429         } else {
3430                 ehea_remove_adapter_mr(adapter);
3431                 return -EIO;
3432         }
3433
3434         return (ssize_t) count;
3435 }
3436
3437 static ssize_t ehea_remove_port(struct device *dev,
3438                                 struct device_attribute *attr,
3439                                 const char *buf, size_t count)
3440 {
3441         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3442         struct ehea_port *port;
3443         int i;
3444         u32 logical_port_id;
3445
3446         sscanf(buf, "%d", &logical_port_id);
3447
3448         port = ehea_get_port(adapter, logical_port_id);
3449
3450         if (port) {
3451                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3452                             logical_port_id);
3453
3454                 ehea_shutdown_single_port(port);
3455
3456                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3457                         if (adapter->port[i] == port) {
3458                                 adapter->port[i] = NULL;
3459                                 break;
3460                         }
3461         } else {
3462                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3463                        logical_port_id);
3464                 return -EINVAL;
3465         }
3466
3467         ehea_remove_adapter_mr(adapter);
3468
3469         return (ssize_t) count;
3470 }
3471
3472 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3473 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3474
3475 int ehea_create_device_sysfs(struct platform_device *dev)
3476 {
3477         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3478         if (ret)
3479                 goto out;
3480
3481         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3482 out:
3483         return ret;
3484 }
3485
3486 void ehea_remove_device_sysfs(struct platform_device *dev)
3487 {
3488         device_remove_file(&dev->dev, &dev_attr_probe_port);
3489         device_remove_file(&dev->dev, &dev_attr_remove_port);
3490 }
3491
3492 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3493                                         const struct of_device_id *id)
3494 {
3495         struct ehea_adapter *adapter;
3496         const u64 *adapter_handle;
3497         int ret;
3498
3499         if (!dev || !dev->dev.of_node) {
3500                 pr_err("Invalid ibmebus device probed\n");
3501                 return -EINVAL;
3502         }
3503
3504         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3505         if (!adapter) {
3506                 ret = -ENOMEM;
3507                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3508                 goto out;
3509         }
3510
3511         list_add(&adapter->list, &adapter_list);
3512
3513         adapter->ofdev = dev;
3514
3515         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3516                                          NULL);
3517         if (adapter_handle)
3518                 adapter->handle = *adapter_handle;
3519
3520         if (!adapter->handle) {
3521                 dev_err(&dev->dev, "failed getting handle for adapter"
3522                         " '%s'\n", dev->dev.of_node->full_name);
3523                 ret = -ENODEV;
3524                 goto out_free_ad;
3525         }
3526
3527         adapter->pd = EHEA_PD_ID;
3528
3529         dev_set_drvdata(&dev->dev, adapter);
3530
3531
3532         /* initialize adapter and ports */
3533         /* get adapter properties */
3534         ret = ehea_sense_adapter_attr(adapter);
3535         if (ret) {
3536                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3537                 goto out_free_ad;
3538         }
3539
3540         adapter->neq = ehea_create_eq(adapter,
3541                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3542         if (!adapter->neq) {
3543                 ret = -EIO;
3544                 dev_err(&dev->dev, "NEQ creation failed\n");
3545                 goto out_free_ad;
3546         }
3547
3548         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3549                      (unsigned long)adapter);
3550
3551         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3552                                   ehea_interrupt_neq, IRQF_DISABLED,
3553                                   "ehea_neq", adapter);
3554         if (ret) {
3555                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3556                 goto out_kill_eq;
3557         }
3558
3559         ret = ehea_create_device_sysfs(dev);
3560         if (ret)
3561                 goto out_free_irq;
3562
3563         ret = ehea_setup_ports(adapter);
3564         if (ret) {
3565                 dev_err(&dev->dev, "setup_ports failed\n");
3566                 goto out_rem_dev_sysfs;
3567         }
3568
3569         ret = 0;
3570         goto out;
3571
3572 out_rem_dev_sysfs:
3573         ehea_remove_device_sysfs(dev);
3574
3575 out_free_irq:
3576         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3577
3578 out_kill_eq:
3579         ehea_destroy_eq(adapter->neq);
3580
3581 out_free_ad:
3582         list_del(&adapter->list);
3583         kfree(adapter);
3584
3585 out:
3586         ehea_update_firmware_handles();
3587
3588         return ret;
3589 }
3590
3591 static int __devexit ehea_remove(struct platform_device *dev)
3592 {
3593         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3594         int i;
3595
3596         for (i = 0; i < EHEA_MAX_PORTS; i++)
3597                 if (adapter->port[i]) {
3598                         ehea_shutdown_single_port(adapter->port[i]);
3599                         adapter->port[i] = NULL;
3600                 }
3601
3602         ehea_remove_device_sysfs(dev);
3603
3604         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3605         tasklet_kill(&adapter->neq_tasklet);
3606
3607         ehea_destroy_eq(adapter->neq);
3608         ehea_remove_adapter_mr(adapter);
3609         list_del(&adapter->list);
3610         kfree(adapter);
3611
3612         ehea_update_firmware_handles();
3613
3614         return 0;
3615 }
3616
3617 void ehea_crash_handler(void)
3618 {
3619         int i;
3620
3621         if (ehea_fw_handles.arr)
3622                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3623                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3624                                              ehea_fw_handles.arr[i].fwh,
3625                                              FORCE_FREE);
3626
3627         if (ehea_bcmc_regs.arr)
3628                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3629                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3630                                               ehea_bcmc_regs.arr[i].port_id,
3631                                               ehea_bcmc_regs.arr[i].reg_type,
3632                                               ehea_bcmc_regs.arr[i].macaddr,
3633                                               0, H_DEREG_BCMC);
3634 }
3635
3636 static int ehea_mem_notifier(struct notifier_block *nb,
3637                              unsigned long action, void *data)
3638 {
3639         int ret = NOTIFY_BAD;
3640         struct memory_notify *arg = data;
3641
3642         mutex_lock(&dlpar_mem_lock);
3643
3644         switch (action) {
3645         case MEM_CANCEL_OFFLINE:
3646                 pr_info("memory offlining canceled");
3647                 /* Readd canceled memory block */
3648         case MEM_ONLINE:
3649                 pr_info("memory is going online");
3650                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3651                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3652                         goto out_unlock;
3653                 ehea_rereg_mrs();
3654                 break;
3655         case MEM_GOING_OFFLINE:
3656                 pr_info("memory is going offline");
3657                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3658                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3659                         goto out_unlock;
3660                 ehea_rereg_mrs();
3661                 break;
3662         default:
3663                 break;
3664         }
3665
3666         ehea_update_firmware_handles();
3667         ret = NOTIFY_OK;
3668
3669 out_unlock:
3670         mutex_unlock(&dlpar_mem_lock);
3671         return ret;
3672 }
3673
3674 static struct notifier_block ehea_mem_nb = {
3675         .notifier_call = ehea_mem_notifier,
3676 };
3677
3678 static int ehea_reboot_notifier(struct notifier_block *nb,
3679                                 unsigned long action, void *unused)
3680 {
3681         if (action == SYS_RESTART) {
3682                 pr_info("Reboot: freeing all eHEA resources\n");
3683                 ibmebus_unregister_driver(&ehea_driver);
3684         }
3685         return NOTIFY_DONE;
3686 }
3687
3688 static struct notifier_block ehea_reboot_nb = {
3689         .notifier_call = ehea_reboot_notifier,
3690 };
3691
3692 static int check_module_parm(void)
3693 {
3694         int ret = 0;
3695
3696         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3697             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3698                 pr_info("Bad parameter: rq1_entries\n");
3699                 ret = -EINVAL;
3700         }
3701         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3702             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3703                 pr_info("Bad parameter: rq2_entries\n");
3704                 ret = -EINVAL;
3705         }
3706         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3707             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3708                 pr_info("Bad parameter: rq3_entries\n");
3709                 ret = -EINVAL;
3710         }
3711         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3712             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3713                 pr_info("Bad parameter: sq_entries\n");
3714                 ret = -EINVAL;
3715         }
3716
3717         return ret;
3718 }
3719
3720 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3721                                       char *buf)
3722 {
3723         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3724 }
3725
3726 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3727                    ehea_show_capabilities, NULL);
3728
3729 int __init ehea_module_init(void)
3730 {
3731         int ret;
3732
3733         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3734
3735         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3736         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3737
3738         mutex_init(&ehea_fw_handles.lock);
3739         spin_lock_init(&ehea_bcmc_regs.lock);
3740
3741         ret = check_module_parm();
3742         if (ret)
3743                 goto out;
3744
3745         ret = ehea_create_busmap();
3746         if (ret)
3747                 goto out;
3748
3749         ret = register_reboot_notifier(&ehea_reboot_nb);
3750         if (ret)
3751                 pr_info("failed registering reboot notifier\n");
3752
3753         ret = register_memory_notifier(&ehea_mem_nb);
3754         if (ret)
3755                 pr_info("failed registering memory remove notifier\n");
3756
3757         ret = crash_shutdown_register(ehea_crash_handler);
3758         if (ret)
3759                 pr_info("failed registering crash handler\n");
3760
3761         ret = ibmebus_register_driver(&ehea_driver);
3762         if (ret) {
3763                 pr_err("failed registering eHEA device driver on ebus\n");
3764                 goto out2;
3765         }
3766
3767         ret = driver_create_file(&ehea_driver.driver,
3768                                  &driver_attr_capabilities);
3769         if (ret) {
3770                 pr_err("failed to register capabilities attribute, ret=%d\n",
3771                        ret);
3772                 goto out3;
3773         }
3774
3775         return ret;
3776
3777 out3:
3778         ibmebus_unregister_driver(&ehea_driver);
3779 out2:
3780         unregister_memory_notifier(&ehea_mem_nb);
3781         unregister_reboot_notifier(&ehea_reboot_nb);
3782         crash_shutdown_unregister(ehea_crash_handler);
3783 out:
3784         return ret;
3785 }
3786
3787 static void __exit ehea_module_exit(void)
3788 {
3789         int ret;
3790
3791         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3792         ibmebus_unregister_driver(&ehea_driver);
3793         unregister_reboot_notifier(&ehea_reboot_nb);
3794         ret = crash_shutdown_unregister(ehea_crash_handler);
3795         if (ret)
3796                 pr_info("failed unregistering crash handler\n");
3797         unregister_memory_notifier(&ehea_mem_nb);
3798         kfree(ehea_fw_handles.arr);
3799         kfree(ehea_bcmc_regs.arr);
3800         ehea_destroy_busmap();
3801 }
3802
3803 module_init(ehea_module_init);
3804 module_exit(ehea_module_exit);