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

   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/in.h>
  32 #include <linux/ip.h>
  33 #include <linux/tcp.h>
  34 #include <linux/udp.h>
  35 #include <linux/if.h>
  36 #include <linux/list.h>
  37 #include <linux/slab.h>
  38 #include <linux/if_ether.h>
  39 #include <linux/notifier.h>
  40 #include <linux/reboot.h>
  41 #include <linux/memory.h>
  42 #include <asm/kexec.h>
  43 #include <linux/mutex.h>
  44 #include <linux/prefetch.h>
  45
  46 #include <net/ip.h>
  47
  48 #include "ehea.h"
  49 #include "ehea_qmr.h"
  50 #include "ehea_phyp.h"
  51
  52
  53 MODULE_LICENSE("GPL");
  54 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  55 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  56 MODULE_VERSION(DRV_VERSION);
  57
  58
  59 static int msg_level = -1;
  60 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  61 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  62 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  63 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  64 static int use_mcs = 1;
  65 static int use_lro;
  66 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  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
  79 MODULE_PARM_DESC(msg_level, "msg_level");
  80 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  81                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  82 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  83                  "[2^x - 1], x = [6..14]. Default = "
  84                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  85 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  86                  "[2^x - 1], x = [6..14]. Default = "
  87                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  88 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  89                  "[2^x - 1], x = [6..14]. Default = "
  90                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  91 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  92                  "[2^x - 1], x = [6..14]. Default = "
  93                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  94 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  95                  "Default = 1");
  96
  97 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
  98                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
  99 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
 100                  "Default = 0");
 101
 102 static int port_name_cnt;
 103 static LIST_HEAD(adapter_list);
 104 static unsigned long ehea_driver_flags;
 105 static DEFINE_MUTEX(dlpar_mem_lock);
 106 struct ehea_fw_handle_array ehea_fw_handles;
 107 struct ehea_bcmc_reg_array ehea_bcmc_regs;
 108
 109
 110 static int __devinit ehea_probe_adapter(struct platform_device *dev,
 111                                         const struct of_device_id *id);
 112
 113 static int __devexit ehea_remove(struct platform_device *dev);
 114
 115 static struct of_device_id ehea_device_table[] = {
 116         {
 117                 .name = "lhea",
 118                 .compatible = "IBM,lhea",
 119         },
 120         {},
 121 };
 122 MODULE_DEVICE_TABLE(of, ehea_device_table);
 123
 124 static struct of_platform_driver ehea_driver = {
 125         .driver = {
 126                 .name = "ehea",
 127                 .owner = THIS_MODULE,
 128                 .of_match_table = ehea_device_table,
 129         },
 130         .probe = ehea_probe_adapter,
 131         .remove = ehea_remove,
 132 };
 133
 134 void ehea_dump(void *adr, int len, char *msg)
 135 {
 136         int x;
 137         unsigned char *deb = adr;
 138         for (x = 0; x < len; x += 16) {
 139                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 140                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 141                 deb += 16;
 142         }
 143 }
 144
 145 void ehea_schedule_port_reset(struct ehea_port *port)
 146 {
 147         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 148                 schedule_work(&port->reset_task);
 149 }
 150
 151 static void ehea_update_firmware_handles(void)
 152 {
 153         struct ehea_fw_handle_entry *arr = NULL;
 154         struct ehea_adapter *adapter;
 155         int num_adapters = 0;
 156         int num_ports = 0;
 157         int num_portres = 0;
 158         int i = 0;
 159         int num_fw_handles, k, l;
 160
 161         /* Determine number of handles */
 162         mutex_lock(&ehea_fw_handles.lock);
 163
 164         list_for_each_entry(adapter, &adapter_list, list) {
 165                 num_adapters++;
 166
 167                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 168                         struct ehea_port *port = adapter->port[k];
 169
 170                         if (!port || (port->state != EHEA_PORT_UP))
 171                                 continue;
 172
 173                         num_ports++;
 174                         num_portres += port->num_def_qps;
 175                 }
 176         }
 177
 178         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 179                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 180                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 181
 182         if (num_fw_handles) {
 183                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 184                 if (!arr)
 185                         goto out;  /* Keep the existing array */
 186         } else
 187                 goto out_update;
 188
 189         list_for_each_entry(adapter, &adapter_list, list) {
 190                 if (num_adapters == 0)
 191                         break;
 192
 193                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 194                         struct ehea_port *port = adapter->port[k];
 195
 196                         if (!port || (port->state != EHEA_PORT_UP) ||
 197                             (num_ports == 0))
 198                                 continue;
 199
 200                         for (l = 0; l < port->num_def_qps; l++) {
 201                                 struct ehea_port_res *pr = &port->port_res[l];
 202
 203                                 arr[i].adh = adapter->handle;
 204                                 arr[i++].fwh = pr->qp->fw_handle;
 205                                 arr[i].adh = adapter->handle;
 206                                 arr[i++].fwh = pr->send_cq->fw_handle;
 207                                 arr[i].adh = adapter->handle;
 208                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 209                                 arr[i].adh = adapter->handle;
 210                                 arr[i++].fwh = pr->eq->fw_handle;
 211                                 arr[i].adh = adapter->handle;
 212                                 arr[i++].fwh = pr->send_mr.handle;
 213                                 arr[i].adh = adapter->handle;
 214                                 arr[i++].fwh = pr->recv_mr.handle;
 215                         }
 216                         arr[i].adh = adapter->handle;
 217                         arr[i++].fwh = port->qp_eq->fw_handle;
 218                         num_ports--;
 219                 }
 220
 221                 arr[i].adh = adapter->handle;
 222                 arr[i++].fwh = adapter->neq->fw_handle;
 223
 224                 if (adapter->mr.handle) {
 225                         arr[i].adh = adapter->handle;
 226                         arr[i++].fwh = adapter->mr.handle;
 227                 }
 228                 num_adapters--;
 229         }
 230
 231 out_update:
 232         kfree(ehea_fw_handles.arr);
 233         ehea_fw_handles.arr = arr;
 234         ehea_fw_handles.num_entries = i;
 235 out:
 236         mutex_unlock(&ehea_fw_handles.lock);
 237 }
 238
 239 static void ehea_update_bcmc_registrations(void)
 240 {
 241         unsigned long flags;
 242         struct ehea_bcmc_reg_entry *arr = NULL;
 243         struct ehea_adapter *adapter;
 244         struct ehea_mc_list *mc_entry;
 245         int num_registrations = 0;
 246         int i = 0;
 247         int k;
 248
 249         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 250
 251         /* Determine number of registrations */
 252         list_for_each_entry(adapter, &adapter_list, list)
 253                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 254                         struct ehea_port *port = adapter->port[k];
 255
 256                         if (!port || (port->state != EHEA_PORT_UP))
 257                                 continue;
 258
 259                         num_registrations += 2; /* Broadcast registrations */
 260
 261                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 262                                 num_registrations += 2;
 263                 }
 264
 265         if (num_registrations) {
 266                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 267                 if (!arr)
 268                         goto out;  /* Keep the existing array */
 269         } else
 270                 goto out_update;
 271
 272         list_for_each_entry(adapter, &adapter_list, list) {
 273                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 274                         struct ehea_port *port = adapter->port[k];
 275
 276                         if (!port || (port->state != EHEA_PORT_UP))
 277                                 continue;
 278
 279                         if (num_registrations == 0)
 280                                 goto out_update;
 281
 282                         arr[i].adh = adapter->handle;
 283                         arr[i].port_id = port->logical_port_id;
 284                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 285                                           EHEA_BCMC_UNTAGGED;
 286                         arr[i++].macaddr = port->mac_addr;
 287
 288                         arr[i].adh = adapter->handle;
 289                         arr[i].port_id = port->logical_port_id;
 290                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 291                                           EHEA_BCMC_VLANID_ALL;
 292                         arr[i++].macaddr = port->mac_addr;
 293                         num_registrations -= 2;
 294
 295                         list_for_each_entry(mc_entry,
 296                                             &port->mc_list->list, list) {
 297                                 if (num_registrations == 0)
 298                                         goto out_update;
 299
 300                                 arr[i].adh = adapter->handle;
 301                                 arr[i].port_id = port->logical_port_id;
 302                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 303                                                   EHEA_BCMC_MULTICAST |
 304                                                   EHEA_BCMC_UNTAGGED;
 305                                 arr[i++].macaddr = mc_entry->macaddr;
 306
 307                                 arr[i].adh = adapter->handle;
 308                                 arr[i].port_id = port->logical_port_id;
 309                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 310                                                   EHEA_BCMC_MULTICAST |
 311                                                   EHEA_BCMC_VLANID_ALL;
 312                                 arr[i++].macaddr = mc_entry->macaddr;
 313                                 num_registrations -= 2;
 314                         }
 315                 }
 316         }
 317
 318 out_update:
 319         kfree(ehea_bcmc_regs.arr);
 320         ehea_bcmc_regs.arr = arr;
 321         ehea_bcmc_regs.num_entries = i;
 322 out:
 323         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 324 }
 325
 326 static struct rtnl_link_stats64 *ehea_get_stats64(struct net_device *dev,
 327                                         struct rtnl_link_stats64 *stats)
 328 {
 329         struct ehea_port *port = netdev_priv(dev);
 330         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 331         int i;
 332
 333         for (i = 0; i < port->num_def_qps; i++) {
 334                 rx_packets += port->port_res[i].rx_packets;
 335                 rx_bytes   += port->port_res[i].rx_bytes;
 336         }
 337
 338         for (i = 0; i < port->num_def_qps; i++) {
 339                 tx_packets += port->port_res[i].tx_packets;
 340                 tx_bytes   += port->port_res[i].tx_bytes;
 341         }
 342
 343         stats->tx_packets = tx_packets;
 344         stats->rx_bytes = rx_bytes;
 345         stats->tx_bytes = tx_bytes;
 346         stats->rx_packets = rx_packets;
 347
 348         return &port->stats;
 349 }
 350
 351 static void ehea_update_stats(struct work_struct *work)
 352 {
 353         struct ehea_port *port =
 354                 container_of(work, struct ehea_port, stats_work.work);
 355         struct net_device *dev = port->netdev;
 356         struct rtnl_link_stats64 *stats = &port->stats;
 357         struct hcp_ehea_port_cb2 *cb2;
 358         u64 hret;
 359
 360         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 361         if (!cb2) {
 362                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 363                 goto resched;
 364         }
 365
 366         hret = ehea_h_query_ehea_port(port->adapter->handle,
 367                                       port->logical_port_id,
 368                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 369         if (hret != H_SUCCESS) {
 370                 netdev_err(dev, "query_ehea_port failed\n");
 371                 goto out_herr;
 372         }
 373
 374         if (netif_msg_hw(port))
 375                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 376
 377         stats->multicast = cb2->rxmcp;
 378         stats->rx_errors = cb2->rxuerr;
 379
 380 out_herr:
 381         free_page((unsigned long)cb2);
 382 resched:
 383         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
 384 }
 385
 386 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 387 {
 388         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 389         struct net_device *dev = pr->port->netdev;
 390         int max_index_mask = pr->rq1_skba.len - 1;
 391         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 392         int adder = 0;
 393         int i;
 394
 395         pr->rq1_skba.os_skbs = 0;
 396
 397         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 398                 if (nr_of_wqes > 0)
 399                         pr->rq1_skba.index = index;
 400                 pr->rq1_skba.os_skbs = fill_wqes;
 401                 return;
 402         }
 403
 404         for (i = 0; i < fill_wqes; i++) {
 405                 if (!skb_arr_rq1[index]) {
 406                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 407                                                               EHEA_L_PKT_SIZE);
 408                         if (!skb_arr_rq1[index]) {
 409                                 netdev_info(dev, "Unable to allocate enough skb in the array\n");
 410                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 411                                 break;
 412                         }
 413                 }
 414                 index--;
 415                 index &= max_index_mask;
 416                 adder++;
 417         }
 418
 419         if (adder == 0)
 420                 return;
 421
 422         /* Ring doorbell */
 423         ehea_update_rq1a(pr->qp, adder);
 424 }
 425
 426 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 427 {
 428         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 429         struct net_device *dev = pr->port->netdev;
 430         int i;
 431
 432         if (nr_rq1a > pr->rq1_skba.len) {
 433                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 434                 return;
 435         }
 436
 437         for (i = 0; i < nr_rq1a; i++) {
 438                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 439                 if (!skb_arr_rq1[i]) {
 440                         netdev_info(dev, "Not enough memory to allocate skb array\n");
 441                         break;
 442                 }
 443         }
 444         /* Ring doorbell */
 445         ehea_update_rq1a(pr->qp, i - 1);
 446 }
 447
 448 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 449                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 450                               int num_wqes, int wqe_type, int packet_size)
 451 {
 452         struct net_device *dev = pr->port->netdev;
 453         struct ehea_qp *qp = pr->qp;
 454         struct sk_buff **skb_arr = q_skba->arr;
 455         struct ehea_rwqe *rwqe;
 456         int i, index, max_index_mask, fill_wqes;
 457         int adder = 0;
 458         int ret = 0;
 459
 460         fill_wqes = q_skba->os_skbs + num_wqes;
 461         q_skba->os_skbs = 0;
 462
 463         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 464                 q_skba->os_skbs = fill_wqes;
 465                 return ret;
 466         }
 467
 468         index = q_skba->index;
 469         max_index_mask = q_skba->len - 1;
 470         for (i = 0; i < fill_wqes; i++) {
 471                 u64 tmp_addr;
 472                 struct sk_buff *skb;
 473
 474                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 475                 if (!skb) {
 476                         q_skba->os_skbs = fill_wqes - i;
 477                         if (q_skba->os_skbs == q_skba->len - 2) {
 478                                 netdev_info(pr->port->netdev,
 479                                             "rq%i ran dry - no mem for skb\n",
 480                                             rq_nr);
 481                                 ret = -ENOMEM;
 482                         }
 483                         break;
 484                 }
 485
 486                 skb_arr[index] = skb;
 487                 tmp_addr = ehea_map_vaddr(skb->data);
 488                 if (tmp_addr == -1) {
 489                         dev_kfree_skb(skb);
 490                         q_skba->os_skbs = fill_wqes - i;
 491                         ret = 0;
 492                         break;
 493                 }
 494
 495                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 496                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 497                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 498                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 499                 rwqe->sg_list[0].vaddr = tmp_addr;
 500                 rwqe->sg_list[0].len = packet_size;
 501                 rwqe->data_segments = 1;
 502
 503                 index++;
 504                 index &= max_index_mask;
 505                 adder++;
 506         }
 507
 508         q_skba->index = index;
 509         if (adder == 0)
 510                 goto out;
 511
 512         /* Ring doorbell */
 513         iosync();
 514         if (rq_nr == 2)
 515                 ehea_update_rq2a(pr->qp, adder);
 516         else
 517                 ehea_update_rq3a(pr->qp, adder);
 518 out:
 519         return ret;
 520 }
 521
 522
 523 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 524 {
 525         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 526                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 527                                   EHEA_RQ2_PKT_SIZE);
 528 }
 529
 530
 531 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 532 {
 533         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 534                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 535                                   EHEA_MAX_PACKET_SIZE);
 536 }
 537
 538 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 539 {
 540         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 541         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 542                 return 0;
 543         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 544             (cqe->header_length == 0))
 545                 return 0;
 546         return -EINVAL;
 547 }
 548
 549 static inline void ehea_fill_skb(struct net_device *dev,
 550                                  struct sk_buff *skb, struct ehea_cqe *cqe,
 551                                  struct ehea_port_res *pr)
 552 {
 553         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 554
 555         skb_put(skb, length);
 556         skb->protocol = eth_type_trans(skb, dev);
 557
 558         /* The packet was not an IPV4 packet so a complemented checksum was
 559            calculated. The value is found in the Internet Checksum field. */
 560         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 561                 skb->ip_summed = CHECKSUM_COMPLETE;
 562                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 563         } else
 564                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 565
 566         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 567 }
 568
 569 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 570                                                int arr_len,
 571                                                struct ehea_cqe *cqe)
 572 {
 573         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 574         struct sk_buff *skb;
 575         void *pref;
 576         int x;
 577
 578         x = skb_index + 1;
 579         x &= (arr_len - 1);
 580
 581         pref = skb_array[x];
 582         if (pref) {
 583                 prefetchw(pref);
 584                 prefetchw(pref + EHEA_CACHE_LINE);
 585
 586                 pref = (skb_array[x]->data);
 587                 prefetch(pref);
 588                 prefetch(pref + EHEA_CACHE_LINE);
 589                 prefetch(pref + EHEA_CACHE_LINE * 2);
 590                 prefetch(pref + EHEA_CACHE_LINE * 3);
 591         }
 592
 593         skb = skb_array[skb_index];
 594         skb_array[skb_index] = NULL;
 595         return skb;
 596 }
 597
 598 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 599                                                   int arr_len, int wqe_index)
 600 {
 601         struct sk_buff *skb;
 602         void *pref;
 603         int x;
 604
 605         x = wqe_index + 1;
 606         x &= (arr_len - 1);
 607
 608         pref = skb_array[x];
 609         if (pref) {
 610                 prefetchw(pref);
 611                 prefetchw(pref + EHEA_CACHE_LINE);
 612
 613                 pref = (skb_array[x]->data);
 614                 prefetchw(pref);
 615                 prefetchw(pref + EHEA_CACHE_LINE);
 616         }
 617
 618         skb = skb_array[wqe_index];
 619         skb_array[wqe_index] = NULL;
 620         return skb;
 621 }
 622
 623 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 624                                  struct ehea_cqe *cqe, int *processed_rq2,
 625                                  int *processed_rq3)
 626 {
 627         struct sk_buff *skb;
 628
 629         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 630                 pr->p_stats.err_tcp_cksum++;
 631         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 632                 pr->p_stats.err_ip_cksum++;
 633         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 634                 pr->p_stats.err_frame_crc++;
 635
 636         if (rq == 2) {
 637                 *processed_rq2 += 1;
 638                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 639                 dev_kfree_skb(skb);
 640         } else if (rq == 3) {
 641                 *processed_rq3 += 1;
 642                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 643                 dev_kfree_skb(skb);
 644         }
 645
 646         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 647                 if (netif_msg_rx_err(pr->port)) {
 648                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 649                                pr->qp->init_attr.qp_nr);
 650                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 651                 }
 652                 ehea_schedule_port_reset(pr->port);
 653                 return 1;
 654         }
 655
 656         return 0;
 657 }
 658
 659 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 660                        void **tcph, u64 *hdr_flags, void *priv)
 661 {
 662         struct ehea_cqe *cqe = priv;
 663         unsigned int ip_len;
 664         struct iphdr *iph;
 665
 666         /* non tcp/udp packets */
 667         if (!cqe->header_length)
 668                 return -1;
 669
 670         /* non tcp packet */
 671         skb_reset_network_header(skb);
 672         iph = ip_hdr(skb);
 673         if (iph->protocol != IPPROTO_TCP)
 674                 return -1;
 675
 676         ip_len = ip_hdrlen(skb);
 677         skb_set_transport_header(skb, ip_len);
 678         *tcph = tcp_hdr(skb);
 679
 680         /* check if ip header and tcp header are complete */
 681         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 682                 return -1;
 683
 684         *hdr_flags = LRO_IPV4 | LRO_TCP;
 685         *iphdr = iph;
 686
 687         return 0;
 688 }
 689
 690 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 691                           struct sk_buff *skb)
 692 {
 693         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 694                 __vlan_hwaccel_put_tag(skb, cqe->vlan_tag);
 695
 696         if (skb->dev->features & NETIF_F_LRO)
 697                 lro_receive_skb(&pr->lro_mgr, skb, cqe);
 698         else
 699                 netif_receive_skb(skb);
 700 }
 701
 702 static int ehea_proc_rwqes(struct net_device *dev,
 703                            struct ehea_port_res *pr,
 704                            int budget)
 705 {
 706         struct ehea_port *port = pr->port;
 707         struct ehea_qp *qp = pr->qp;
 708         struct ehea_cqe *cqe;
 709         struct sk_buff *skb;
 710         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 711         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 712         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 713         int skb_arr_rq1_len = pr->rq1_skba.len;
 714         int skb_arr_rq2_len = pr->rq2_skba.len;
 715         int skb_arr_rq3_len = pr->rq3_skba.len;
 716         int processed, processed_rq1, processed_rq2, processed_rq3;
 717         u64 processed_bytes = 0;
 718         int wqe_index, last_wqe_index, rq, port_reset;
 719
 720         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 721         last_wqe_index = 0;
 722
 723         cqe = ehea_poll_rq1(qp, &wqe_index);
 724         while ((processed < budget) && cqe) {
 725                 ehea_inc_rq1(qp);
 726                 processed_rq1++;
 727                 processed++;
 728                 if (netif_msg_rx_status(port))
 729                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 730
 731                 last_wqe_index = wqe_index;
 732                 rmb();
 733                 if (!ehea_check_cqe(cqe, &rq)) {
 734                         if (rq == 1) {
 735                                 /* LL RQ1 */
 736                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 737                                                           skb_arr_rq1_len,
 738                                                           wqe_index);
 739                                 if (unlikely(!skb)) {
 740                                         netif_info(port, rx_err, dev,
 741                                                   "LL rq1: skb=NULL\n");
 742
 743                                         skb = netdev_alloc_skb(dev,
 744                                                                EHEA_L_PKT_SIZE);
 745                                         if (!skb) {
 746                                                 netdev_err(dev, "Not enough memory to allocate skb\n");
 747                                                 break;
 748                                         }
 749                                 }
 750                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 751                                                  cqe->num_bytes_transfered - 4);
 752                                 ehea_fill_skb(dev, skb, cqe, pr);
 753                         } else if (rq == 2) {
 754                                 /* RQ2 */
 755                                 skb = get_skb_by_index(skb_arr_rq2,
 756                                                        skb_arr_rq2_len, cqe);
 757                                 if (unlikely(!skb)) {
 758                                         netif_err(port, rx_err, dev,
 759                                                   "rq2: skb=NULL\n");
 760                                         break;
 761                                 }
 762                                 ehea_fill_skb(dev, skb, cqe, pr);
 763                                 processed_rq2++;
 764                         } else {
 765                                 /* RQ3 */
 766                                 skb = get_skb_by_index(skb_arr_rq3,
 767                                                        skb_arr_rq3_len, cqe);
 768                                 if (unlikely(!skb)) {
 769                                         netif_err(port, rx_err, dev,
 770                                                   "rq3: skb=NULL\n");
 771                                         break;
 772                                 }
 773                                 ehea_fill_skb(dev, skb, cqe, pr);
 774                                 processed_rq3++;
 775                         }
 776
 777                         processed_bytes += skb->len;
 778                         ehea_proc_skb(pr, cqe, skb);
 779                 } else {
 780                         pr->p_stats.poll_receive_errors++;
 781                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 782                                                            &processed_rq2,
 783                                                            &processed_rq3);
 784                         if (port_reset)
 785                                 break;
 786                 }
 787                 cqe = ehea_poll_rq1(qp, &wqe_index);
 788         }
 789         if (dev->features & NETIF_F_LRO)
 790                 lro_flush_all(&pr->lro_mgr);
 791
 792         pr->rx_packets += processed;
 793         pr->rx_bytes += processed_bytes;
 794
 795         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 796         ehea_refill_rq2(pr, processed_rq2);
 797         ehea_refill_rq3(pr, processed_rq3);
 798
 799         return processed;
 800 }
 801
 802 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 803
 804 static void reset_sq_restart_flag(struct ehea_port *port)
 805 {
 806         int i;
 807
 808         for (i = 0; i < port->num_def_qps; i++) {
 809                 struct ehea_port_res *pr = &port->port_res[i];
 810                 pr->sq_restart_flag = 0;
 811         }
 812         wake_up(&port->restart_wq);
 813 }
 814
 815 static void check_sqs(struct ehea_port *port)
 816 {
 817         struct ehea_swqe *swqe;
 818         int swqe_index;
 819         int i, k;
 820
 821         for (i = 0; i < port->num_def_qps; i++) {
 822                 struct ehea_port_res *pr = &port->port_res[i];
 823                 int ret;
 824                 k = 0;
 825                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 826                 memset(swqe, 0, SWQE_HEADER_SIZE);
 827                 atomic_dec(&pr->swqe_avail);
 828
 829                 swqe->tx_control |= EHEA_SWQE_PURGE;
 830                 swqe->wr_id = SWQE_RESTART_CHECK;
 831                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 832                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 833                 swqe->immediate_data_length = 80;
 834
 835                 ehea_post_swqe(pr->qp, swqe);
 836
 837                 ret = wait_event_timeout(port->restart_wq,
 838                                          pr->sq_restart_flag == 0,
 839                                          msecs_to_jiffies(100));
 840
 841                 if (!ret) {
 842                         pr_err("HW/SW queues out of sync\n");
 843                         ehea_schedule_port_reset(pr->port);
 844                         return;
 845                 }
 846         }
 847 }
 848
 849
 850 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 851 {
 852         struct sk_buff *skb;
 853         struct ehea_cq *send_cq = pr->send_cq;
 854         struct ehea_cqe *cqe;
 855         int quota = my_quota;
 856         int cqe_counter = 0;
 857         int swqe_av = 0;
 858         int index;
 859         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 860                                                 pr - &pr->port->port_res[0]);
 861
 862         cqe = ehea_poll_cq(send_cq);
 863         while (cqe && (quota > 0)) {
 864                 ehea_inc_cq(send_cq);
 865
 866                 cqe_counter++;
 867                 rmb();
 868
 869                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 870                         pr->sq_restart_flag = 1;
 871                         swqe_av++;
 872                         break;
 873                 }
 874
 875                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 876                         pr_err("Bad send completion status=0x%04X\n",
 877                                cqe->status);
 878
 879                         if (netif_msg_tx_err(pr->port))
 880                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 881
 882                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 883                                 pr_err("Resetting port\n");
 884                                 ehea_schedule_port_reset(pr->port);
 885                                 break;
 886                         }
 887                 }
 888
 889                 if (netif_msg_tx_done(pr->port))
 890                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 891
 892                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 893                            == EHEA_SWQE2_TYPE)) {
 894
 895                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 896                         skb = pr->sq_skba.arr[index];
 897                         dev_kfree_skb(skb);
 898                         pr->sq_skba.arr[index] = NULL;
 899                 }
 900
 901                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 902                 quota--;
 903
 904                 cqe = ehea_poll_cq(send_cq);
 905         }
 906
 907         ehea_update_feca(send_cq, cqe_counter);
 908         atomic_add(swqe_av, &pr->swqe_avail);
 909
 910         if (unlikely(netif_tx_queue_stopped(txq) &&
 911                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 912                 __netif_tx_lock(txq, smp_processor_id());
 913                 if (netif_tx_queue_stopped(txq) &&
 914                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 915                         netif_tx_wake_queue(txq);
 916                 __netif_tx_unlock(txq);
 917         }
 918
 919         wake_up(&pr->port->swqe_avail_wq);
 920
 921         return cqe;
 922 }
 923
 924 #define EHEA_POLL_MAX_CQES 65535
 925
 926 static int ehea_poll(struct napi_struct *napi, int budget)
 927 {
 928         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 929                                                 napi);
 930         struct net_device *dev = pr->port->netdev;
 931         struct ehea_cqe *cqe;
 932         struct ehea_cqe *cqe_skb = NULL;
 933         int wqe_index;
 934         int rx = 0;
 935
 936         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 937         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 938
 939         while (rx != budget) {
 940                 napi_complete(napi);
 941                 ehea_reset_cq_ep(pr->recv_cq);
 942                 ehea_reset_cq_ep(pr->send_cq);
 943                 ehea_reset_cq_n1(pr->recv_cq);
 944                 ehea_reset_cq_n1(pr->send_cq);
 945                 rmb();
 946                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 947                 cqe_skb = ehea_poll_cq(pr->send_cq);
 948
 949                 if (!cqe && !cqe_skb)
 950                         return rx;
 951
 952                 if (!napi_reschedule(napi))
 953                         return rx;
 954
 955                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 956                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 957         }
 958
 959         return rx;
 960 }
 961
 962 #ifdef CONFIG_NET_POLL_CONTROLLER
 963 static void ehea_netpoll(struct net_device *dev)
 964 {
 965         struct ehea_port *port = netdev_priv(dev);
 966         int i;
 967
 968         for (i = 0; i < port->num_def_qps; i++)
 969                 napi_schedule(&port->port_res[i].napi);
 970 }
 971 #endif
 972
 973 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 974 {
 975         struct ehea_port_res *pr = param;
 976
 977         napi_schedule(&pr->napi);
 978
 979         return IRQ_HANDLED;
 980 }
 981
 982 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 983 {
 984         struct ehea_port *port = param;
 985         struct ehea_eqe *eqe;
 986         struct ehea_qp *qp;
 987         u32 qp_token;
 988         u64 resource_type, aer, aerr;
 989         int reset_port = 0;
 990
 991         eqe = ehea_poll_eq(port->qp_eq);
 992
 993         while (eqe) {
 994                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 995                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 996                        eqe->entry, qp_token);
 997
 998                 qp = port->port_res[qp_token].qp;
 999
1000                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
1001                                                 &aer, &aerr);
1002
1003                 if (resource_type == EHEA_AER_RESTYPE_QP) {
1004                         if ((aer & EHEA_AER_RESET_MASK) ||
1005                             (aerr & EHEA_AERR_RESET_MASK))
1006                                  reset_port = 1;
1007                 } else
1008                         reset_port = 1;   /* Reset in case of CQ or EQ error */
1009
1010                 eqe = ehea_poll_eq(port->qp_eq);
1011         }
1012
1013         if (reset_port) {
1014                 pr_err("Resetting port\n");
1015                 ehea_schedule_port_reset(port);
1016         }
1017
1018         return IRQ_HANDLED;
1019 }
1020
1021 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
1022                                        int logical_port)
1023 {
1024         int i;
1025
1026         for (i = 0; i < EHEA_MAX_PORTS; i++)
1027                 if (adapter->port[i])
1028                         if (adapter->port[i]->logical_port_id == logical_port)
1029                                 return adapter->port[i];
1030         return NULL;
1031 }
1032
1033 int ehea_sense_port_attr(struct ehea_port *port)
1034 {
1035         int ret;
1036         u64 hret;
1037         struct hcp_ehea_port_cb0 *cb0;
1038
1039         /* may be called via ehea_neq_tasklet() */
1040         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1041         if (!cb0) {
1042                 pr_err("no mem for cb0\n");
1043                 ret = -ENOMEM;
1044                 goto out;
1045         }
1046
1047         hret = ehea_h_query_ehea_port(port->adapter->handle,
1048                                       port->logical_port_id, H_PORT_CB0,
1049                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1050                                       cb0);
1051         if (hret != H_SUCCESS) {
1052                 ret = -EIO;
1053                 goto out_free;
1054         }
1055
1056         /* MAC address */
1057         port->mac_addr = cb0->port_mac_addr << 16;
1058
1059         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1060                 ret = -EADDRNOTAVAIL;
1061                 goto out_free;
1062         }
1063
1064         /* Port speed */
1065         switch (cb0->port_speed) {
1066         case H_SPEED_10M_H:
1067                 port->port_speed = EHEA_SPEED_10M;
1068                 port->full_duplex = 0;
1069                 break;
1070         case H_SPEED_10M_F:
1071                 port->port_speed = EHEA_SPEED_10M;
1072                 port->full_duplex = 1;
1073                 break;
1074         case H_SPEED_100M_H:
1075                 port->port_speed = EHEA_SPEED_100M;
1076                 port->full_duplex = 0;
1077                 break;
1078         case H_SPEED_100M_F:
1079                 port->port_speed = EHEA_SPEED_100M;
1080                 port->full_duplex = 1;
1081                 break;
1082         case H_SPEED_1G_F:
1083                 port->port_speed = EHEA_SPEED_1G;
1084                 port->full_duplex = 1;
1085                 break;
1086         case H_SPEED_10G_F:
1087                 port->port_speed = EHEA_SPEED_10G;
1088                 port->full_duplex = 1;
1089                 break;
1090         default:
1091                 port->port_speed = 0;
1092                 port->full_duplex = 0;
1093                 break;
1094         }
1095
1096         port->autoneg = 1;
1097         port->num_mcs = cb0->num_default_qps;
1098
1099         /* Number of default QPs */
1100         if (use_mcs)
1101                 port->num_def_qps = cb0->num_default_qps;
1102         else
1103                 port->num_def_qps = 1;
1104
1105         if (!port->num_def_qps) {
1106                 ret = -EINVAL;
1107                 goto out_free;
1108         }
1109
1110         ret = 0;
1111 out_free:
1112         if (ret || netif_msg_probe(port))
1113                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1114         free_page((unsigned long)cb0);
1115 out:
1116         return ret;
1117 }
1118
1119 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1120 {
1121         struct hcp_ehea_port_cb4 *cb4;
1122         u64 hret;
1123         int ret = 0;
1124
1125         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1126         if (!cb4) {
1127                 pr_err("no mem for cb4\n");
1128                 ret = -ENOMEM;
1129                 goto out;
1130         }
1131
1132         cb4->port_speed = port_speed;
1133
1134         netif_carrier_off(port->netdev);
1135
1136         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1137                                        port->logical_port_id,
1138                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1139         if (hret == H_SUCCESS) {
1140                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1141
1142                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1143                                               port->logical_port_id,
1144                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1145                                               cb4);
1146                 if (hret == H_SUCCESS) {
1147                         switch (cb4->port_speed) {
1148                         case H_SPEED_10M_H:
1149                                 port->port_speed = EHEA_SPEED_10M;
1150                                 port->full_duplex = 0;
1151                                 break;
1152                         case H_SPEED_10M_F:
1153                                 port->port_speed = EHEA_SPEED_10M;
1154                                 port->full_duplex = 1;
1155                                 break;
1156                         case H_SPEED_100M_H:
1157                                 port->port_speed = EHEA_SPEED_100M;
1158                                 port->full_duplex = 0;
1159                                 break;
1160                         case H_SPEED_100M_F:
1161                                 port->port_speed = EHEA_SPEED_100M;
1162                                 port->full_duplex = 1;
1163                                 break;
1164                         case H_SPEED_1G_F:
1165                                 port->port_speed = EHEA_SPEED_1G;
1166                                 port->full_duplex = 1;
1167                                 break;
1168                         case H_SPEED_10G_F:
1169                                 port->port_speed = EHEA_SPEED_10G;
1170                                 port->full_duplex = 1;
1171                                 break;
1172                         default:
1173                                 port->port_speed = 0;
1174                                 port->full_duplex = 0;
1175                                 break;
1176                         }
1177                 } else {
1178                         pr_err("Failed sensing port speed\n");
1179                         ret = -EIO;
1180                 }
1181         } else {
1182                 if (hret == H_AUTHORITY) {
1183                         pr_info("Hypervisor denied setting port speed\n");
1184                         ret = -EPERM;
1185                 } else {
1186                         ret = -EIO;
1187                         pr_err("Failed setting port speed\n");
1188                 }
1189         }
1190         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1191                 netif_carrier_on(port->netdev);
1192
1193         free_page((unsigned long)cb4);
1194 out:
1195         return ret;
1196 }
1197
1198 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1199 {
1200         int ret;
1201         u8 ec;
1202         u8 portnum;
1203         struct ehea_port *port;
1204         struct net_device *dev;
1205
1206         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1207         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1208         port = ehea_get_port(adapter, portnum);
1209         dev = port->netdev;
1210
1211         switch (ec) {
1212         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1213
1214                 if (!port) {
1215                         netdev_err(dev, "unknown portnum %x\n", portnum);
1216                         break;
1217                 }
1218
1219                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1220                         if (!netif_carrier_ok(dev)) {
1221                                 ret = ehea_sense_port_attr(port);
1222                                 if (ret) {
1223                                         netdev_err(dev, "failed resensing port attributes\n");
1224                                         break;
1225                                 }
1226
1227                                 netif_info(port, link, dev,
1228                                            "Logical port up: %dMbps %s Duplex\n",
1229                                            port->port_speed,
1230                                            port->full_duplex == 1 ?
1231                                            "Full" : "Half");
1232
1233                                 netif_carrier_on(dev);
1234                                 netif_wake_queue(dev);
1235                         }
1236                 } else
1237                         if (netif_carrier_ok(dev)) {
1238                                 netif_info(port, link, dev,
1239                                            "Logical port down\n");
1240                                 netif_carrier_off(dev);
1241                                 netif_tx_disable(dev);
1242                         }
1243
1244                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1245                         port->phy_link = EHEA_PHY_LINK_UP;
1246                         netif_info(port, link, dev,
1247                                    "Physical port up\n");
1248                         if (prop_carrier_state)
1249                                 netif_carrier_on(dev);
1250                 } else {
1251                         port->phy_link = EHEA_PHY_LINK_DOWN;
1252                         netif_info(port, link, dev,
1253                                    "Physical port down\n");
1254                         if (prop_carrier_state)
1255                                 netif_carrier_off(dev);
1256                 }
1257
1258                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1259                         netdev_info(dev,
1260                                     "External switch port is primary port\n");
1261                 else
1262                         netdev_info(dev,
1263                                     "External switch port is backup port\n");
1264
1265                 break;
1266         case EHEA_EC_ADAPTER_MALFUNC:
1267                 netdev_err(dev, "Adapter malfunction\n");
1268                 break;
1269         case EHEA_EC_PORT_MALFUNC:
1270                 netdev_info(dev, "Port malfunction\n");
1271                 netif_carrier_off(dev);
1272                 netif_tx_disable(dev);
1273                 break;
1274         default:
1275                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1276                 break;
1277         }
1278 }
1279
1280 static void ehea_neq_tasklet(unsigned long data)
1281 {
1282         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1283         struct ehea_eqe *eqe;
1284         u64 event_mask;
1285
1286         eqe = ehea_poll_eq(adapter->neq);
1287         pr_debug("eqe=%p\n", eqe);
1288
1289         while (eqe) {
1290                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1291                 ehea_parse_eqe(adapter, eqe->entry);
1292                 eqe = ehea_poll_eq(adapter->neq);
1293                 pr_debug("next eqe=%p\n", eqe);
1294         }
1295
1296         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1297                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1298                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1299
1300         ehea_h_reset_events(adapter->handle,
1301                             adapter->neq->fw_handle, event_mask);
1302 }
1303
1304 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1305 {
1306         struct ehea_adapter *adapter = param;
1307         tasklet_hi_schedule(&adapter->neq_tasklet);
1308         return IRQ_HANDLED;
1309 }
1310
1311
1312 static int ehea_fill_port_res(struct ehea_port_res *pr)
1313 {
1314         int ret;
1315         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1316
1317         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1318
1319         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1320
1321         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1322
1323         return ret;
1324 }
1325
1326 static int ehea_reg_interrupts(struct net_device *dev)
1327 {
1328         struct ehea_port *port = netdev_priv(dev);
1329         struct ehea_port_res *pr;
1330         int i, ret;
1331
1332
1333         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1334                  dev->name);
1335
1336         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1337                                   ehea_qp_aff_irq_handler,
1338                                   IRQF_DISABLED, port->int_aff_name, port);
1339         if (ret) {
1340                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1341                            port->qp_eq->attr.ist1);
1342                 goto out_free_qpeq;
1343         }
1344
1345         netif_info(port, ifup, dev,
1346                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1347                    port->qp_eq->attr.ist1);
1348
1349
1350         for (i = 0; i < port->num_def_qps; i++) {
1351                 pr = &port->port_res[i];
1352                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1353                          "%s-queue%d", dev->name, i);
1354                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1355                                           ehea_recv_irq_handler,
1356                                           IRQF_DISABLED, pr->int_send_name,
1357                                           pr);
1358                 if (ret) {
1359                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1360                                    i, pr->eq->attr.ist1);
1361                         goto out_free_req;
1362                 }
1363                 netif_info(port, ifup, dev,
1364                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1365                            pr->eq->attr.ist1, i);
1366         }
1367 out:
1368         return ret;
1369
1370
1371 out_free_req:
1372         while (--i >= 0) {
1373                 u32 ist = port->port_res[i].eq->attr.ist1;
1374                 ibmebus_free_irq(ist, &port->port_res[i]);
1375         }
1376
1377 out_free_qpeq:
1378         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1379         i = port->num_def_qps;
1380
1381         goto out;
1382
1383 }
1384
1385 static void ehea_free_interrupts(struct net_device *dev)
1386 {
1387         struct ehea_port *port = netdev_priv(dev);
1388         struct ehea_port_res *pr;
1389         int i;
1390
1391         /* send */
1392
1393         for (i = 0; i < port->num_def_qps; i++) {
1394                 pr = &port->port_res[i];
1395                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1396                 netif_info(port, intr, dev,
1397                            "free send irq for res %d with handle 0x%X\n",
1398                            i, pr->eq->attr.ist1);
1399         }
1400
1401         /* associated events */
1402         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1403         netif_info(port, intr, dev,
1404                    "associated event interrupt for handle 0x%X freed\n",
1405                    port->qp_eq->attr.ist1);
1406 }
1407
1408 static int ehea_configure_port(struct ehea_port *port)
1409 {
1410         int ret, i;
1411         u64 hret, mask;
1412         struct hcp_ehea_port_cb0 *cb0;
1413
1414         ret = -ENOMEM;
1415         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1416         if (!cb0)
1417                 goto out;
1418
1419         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1420                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1421                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1422                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1423                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1424                                       PXLY_RC_VLAN_FILTER)
1425                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1426
1427         for (i = 0; i < port->num_mcs; i++)
1428                 if (use_mcs)
1429                         cb0->default_qpn_arr[i] =
1430                                 port->port_res[i].qp->init_attr.qp_nr;
1431                 else
1432                         cb0->default_qpn_arr[i] =
1433                                 port->port_res[0].qp->init_attr.qp_nr;
1434
1435         if (netif_msg_ifup(port))
1436                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1437
1438         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1439              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1440
1441         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1442                                        port->logical_port_id,
1443                                        H_PORT_CB0, mask, cb0);
1444         ret = -EIO;
1445         if (hret != H_SUCCESS)
1446                 goto out_free;
1447
1448         ret = 0;
1449
1450 out_free:
1451         free_page((unsigned long)cb0);
1452 out:
1453         return ret;
1454 }
1455
1456 int ehea_gen_smrs(struct ehea_port_res *pr)
1457 {
1458         int ret;
1459         struct ehea_adapter *adapter = pr->port->adapter;
1460
1461         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1462         if (ret)
1463                 goto out;
1464
1465         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1466         if (ret)
1467                 goto out_free;
1468
1469         return 0;
1470
1471 out_free:
1472         ehea_rem_mr(&pr->send_mr);
1473 out:
1474         pr_err("Generating SMRS failed\n");
1475         return -EIO;
1476 }
1477
1478 int ehea_rem_smrs(struct ehea_port_res *pr)
1479 {
1480         if ((ehea_rem_mr(&pr->send_mr)) ||
1481             (ehea_rem_mr(&pr->recv_mr)))
1482                 return -EIO;
1483         else
1484                 return 0;
1485 }
1486
1487 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1488 {
1489         int arr_size = sizeof(void *) * max_q_entries;
1490
1491         q_skba->arr = vzalloc(arr_size);
1492         if (!q_skba->arr)
1493                 return -ENOMEM;
1494
1495         q_skba->len = max_q_entries;
1496         q_skba->index = 0;
1497         q_skba->os_skbs = 0;
1498
1499         return 0;
1500 }
1501
1502 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1503                               struct port_res_cfg *pr_cfg, int queue_token)
1504 {
1505         struct ehea_adapter *adapter = port->adapter;
1506         enum ehea_eq_type eq_type = EHEA_EQ;
1507         struct ehea_qp_init_attr *init_attr = NULL;
1508         int ret = -EIO;
1509         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1510
1511         tx_bytes = pr->tx_bytes;
1512         tx_packets = pr->tx_packets;
1513         rx_bytes = pr->rx_bytes;
1514         rx_packets = pr->rx_packets;
1515
1516         memset(pr, 0, sizeof(struct ehea_port_res));
1517
1518         pr->tx_bytes = rx_bytes;
1519         pr->tx_packets = tx_packets;
1520         pr->rx_bytes = rx_bytes;
1521         pr->rx_packets = rx_packets;
1522
1523         pr->port = port;
1524
1525         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1526         if (!pr->eq) {
1527                 pr_err("create_eq failed (eq)\n");
1528                 goto out_free;
1529         }
1530
1531         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1532                                      pr->eq->fw_handle,
1533                                      port->logical_port_id);
1534         if (!pr->recv_cq) {
1535                 pr_err("create_cq failed (cq_recv)\n");
1536                 goto out_free;
1537         }
1538
1539         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1540                                      pr->eq->fw_handle,
1541                                      port->logical_port_id);
1542         if (!pr->send_cq) {
1543                 pr_err("create_cq failed (cq_send)\n");
1544                 goto out_free;
1545         }
1546
1547         if (netif_msg_ifup(port))
1548                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1549                         pr->send_cq->attr.act_nr_of_cqes,
1550                         pr->recv_cq->attr.act_nr_of_cqes);
1551
1552         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1553         if (!init_attr) {
1554                 ret = -ENOMEM;
1555                 pr_err("no mem for ehea_qp_init_attr\n");
1556                 goto out_free;
1557         }
1558
1559         init_attr->low_lat_rq1 = 1;
1560         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1561         init_attr->rq_count = 3;
1562         init_attr->qp_token = queue_token;
1563         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1564         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1565         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1566         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1567         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1568         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1569         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1570         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1571         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1572         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1573         init_attr->port_nr = port->logical_port_id;
1574         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1575         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1576         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1577
1578         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1579         if (!pr->qp) {
1580                 pr_err("create_qp failed\n");
1581                 ret = -EIO;
1582                 goto out_free;
1583         }
1584
1585         if (netif_msg_ifup(port))
1586                 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",
1587                         init_attr->qp_nr,
1588                         init_attr->act_nr_send_wqes,
1589                         init_attr->act_nr_rwqes_rq1,
1590                         init_attr->act_nr_rwqes_rq2,
1591                         init_attr->act_nr_rwqes_rq3);
1592
1593         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1594
1595         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1596         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1597         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1598         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1599         if (ret)
1600                 goto out_free;
1601
1602         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1603         if (ehea_gen_smrs(pr) != 0) {
1604                 ret = -EIO;
1605                 goto out_free;
1606         }
1607
1608         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1609
1610         kfree(init_attr);
1611
1612         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1613
1614         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1615         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1616         pr->lro_mgr.lro_arr = pr->lro_desc;
1617         pr->lro_mgr.get_skb_header = get_skb_hdr;
1618         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1619         pr->lro_mgr.dev = port->netdev;
1620         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1621         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1622
1623         ret = 0;
1624         goto out;
1625
1626 out_free:
1627         kfree(init_attr);
1628         vfree(pr->sq_skba.arr);
1629         vfree(pr->rq1_skba.arr);
1630         vfree(pr->rq2_skba.arr);
1631         vfree(pr->rq3_skba.arr);
1632         ehea_destroy_qp(pr->qp);
1633         ehea_destroy_cq(pr->send_cq);
1634         ehea_destroy_cq(pr->recv_cq);
1635         ehea_destroy_eq(pr->eq);
1636 out:
1637         return ret;
1638 }
1639
1640 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1641 {
1642         int ret, i;
1643
1644         if (pr->qp)
1645                 netif_napi_del(&pr->napi);
1646
1647         ret = ehea_destroy_qp(pr->qp);
1648
1649         if (!ret) {
1650                 ehea_destroy_cq(pr->send_cq);
1651                 ehea_destroy_cq(pr->recv_cq);
1652                 ehea_destroy_eq(pr->eq);
1653
1654                 for (i = 0; i < pr->rq1_skba.len; i++)
1655                         if (pr->rq1_skba.arr[i])
1656                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1657
1658                 for (i = 0; i < pr->rq2_skba.len; i++)
1659                         if (pr->rq2_skba.arr[i])
1660                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1661
1662                 for (i = 0; i < pr->rq3_skba.len; i++)
1663                         if (pr->rq3_skba.arr[i])
1664                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1665
1666                 for (i = 0; i < pr->sq_skba.len; i++)
1667                         if (pr->sq_skba.arr[i])
1668                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1669
1670                 vfree(pr->rq1_skba.arr);
1671                 vfree(pr->rq2_skba.arr);
1672                 vfree(pr->rq3_skba.arr);
1673                 vfree(pr->sq_skba.arr);
1674                 ret = ehea_rem_smrs(pr);
1675         }
1676         return ret;
1677 }
1678
1679 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1680                                   u32 lkey)
1681 {
1682         int skb_data_size = skb_headlen(skb);
1683         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1684         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1685         unsigned int immediate_len = SWQE2_MAX_IMM;
1686
1687         swqe->descriptors = 0;
1688
1689         if (skb_is_gso(skb)) {
1690                 swqe->tx_control |= EHEA_SWQE_TSO;
1691                 swqe->mss = skb_shinfo(skb)->gso_size;
1692                 /*
1693                  * For TSO packets we only copy the headers into the
1694                  * immediate area.
1695                  */
1696                 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1697         }
1698
1699         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1700                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1701                 swqe->immediate_data_length = immediate_len;
1702
1703                 if (skb_data_size > immediate_len) {
1704                         sg1entry->l_key = lkey;
1705                         sg1entry->len = skb_data_size - immediate_len;
1706                         sg1entry->vaddr =
1707                                 ehea_map_vaddr(skb->data + immediate_len);
1708                         swqe->descriptors++;
1709                 }
1710         } else {
1711                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1712                 swqe->immediate_data_length = skb_data_size;
1713         }
1714 }
1715
1716 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1717                                     struct ehea_swqe *swqe, u32 lkey)
1718 {
1719         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1720         skb_frag_t *frag;
1721         int nfrags, sg1entry_contains_frag_data, i;
1722
1723         nfrags = skb_shinfo(skb)->nr_frags;
1724         sg1entry = &swqe->u.immdata_desc.sg_entry;
1725         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1726         sg1entry_contains_frag_data = 0;
1727
1728         write_swqe2_immediate(skb, swqe, lkey);
1729
1730         /* write descriptors */
1731         if (nfrags > 0) {
1732                 if (swqe->descriptors == 0) {
1733                         /* sg1entry not yet used */
1734                         frag = &skb_shinfo(skb)->frags[0];
1735
1736                         /* copy sg1entry data */
1737                         sg1entry->l_key = lkey;
1738                         sg1entry->len = frag->size;
1739                         sg1entry->vaddr =
1740                                 ehea_map_vaddr(skb_frag_address(frag));
1741                         swqe->descriptors++;
1742                         sg1entry_contains_frag_data = 1;
1743                 }
1744
1745                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1746
1747                         frag = &skb_shinfo(skb)->frags[i];
1748                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1749
1750                         sgentry->l_key = lkey;
1751                         sgentry->len = frag->size;
1752                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1753                         swqe->descriptors++;
1754                 }
1755         }
1756 }
1757
1758 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1759 {
1760         int ret = 0;
1761         u64 hret;
1762         u8 reg_type;
1763
1764         /* De/Register untagged packets */
1765         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1766         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1767                                      port->logical_port_id,
1768                                      reg_type, port->mac_addr, 0, hcallid);
1769         if (hret != H_SUCCESS) {
1770                 pr_err("%sregistering bc address failed (tagged)\n",
1771                        hcallid == H_REG_BCMC ? "" : "de");
1772                 ret = -EIO;
1773                 goto out_herr;
1774         }
1775
1776         /* De/Register VLAN packets */
1777         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1778         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1779                                      port->logical_port_id,
1780                                      reg_type, port->mac_addr, 0, hcallid);
1781         if (hret != H_SUCCESS) {
1782                 pr_err("%sregistering bc address failed (vlan)\n",
1783                        hcallid == H_REG_BCMC ? "" : "de");
1784                 ret = -EIO;
1785         }
1786 out_herr:
1787         return ret;
1788 }
1789
1790 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1791 {
1792         struct ehea_port *port = netdev_priv(dev);
1793         struct sockaddr *mac_addr = sa;
1794         struct hcp_ehea_port_cb0 *cb0;
1795         int ret;
1796         u64 hret;
1797
1798         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1799                 ret = -EADDRNOTAVAIL;
1800                 goto out;
1801         }
1802
1803         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1804         if (!cb0) {
1805                 pr_err("no mem for cb0\n");
1806                 ret = -ENOMEM;
1807                 goto out;
1808         }
1809
1810         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1811
1812         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1813
1814         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1815                                        port->logical_port_id, H_PORT_CB0,
1816                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1817         if (hret != H_SUCCESS) {
1818                 ret = -EIO;
1819                 goto out_free;
1820         }
1821
1822         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1823
1824         /* Deregister old MAC in pHYP */
1825         if (port->state == EHEA_PORT_UP) {
1826                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1827                 if (ret)
1828                         goto out_upregs;
1829         }
1830
1831         port->mac_addr = cb0->port_mac_addr << 16;
1832
1833         /* Register new MAC in pHYP */
1834         if (port->state == EHEA_PORT_UP) {
1835                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1836                 if (ret)
1837                         goto out_upregs;
1838         }
1839
1840         ret = 0;
1841
1842 out_upregs:
1843         ehea_update_bcmc_registrations();
1844 out_free:
1845         free_page((unsigned long)cb0);
1846 out:
1847         return ret;
1848 }
1849
1850 static void ehea_promiscuous_error(u64 hret, int enable)
1851 {
1852         if (hret == H_AUTHORITY)
1853                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1854                         enable == 1 ? "en" : "dis");
1855         else
1856                 pr_err("failed %sabling promiscuous mode\n",
1857                        enable == 1 ? "en" : "dis");
1858 }
1859
1860 static void ehea_promiscuous(struct net_device *dev, int enable)
1861 {
1862         struct ehea_port *port = netdev_priv(dev);
1863         struct hcp_ehea_port_cb7 *cb7;
1864         u64 hret;
1865
1866         if (enable == port->promisc)
1867                 return;
1868
1869         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1870         if (!cb7) {
1871                 pr_err("no mem for cb7\n");
1872                 goto out;
1873         }
1874
1875         /* Modify Pxs_DUCQPN in CB7 */
1876         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1877
1878         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1879                                        port->logical_port_id,
1880                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1881         if (hret) {
1882                 ehea_promiscuous_error(hret, enable);
1883                 goto out;
1884         }
1885
1886         port->promisc = enable;
1887 out:
1888         free_page((unsigned long)cb7);
1889 }
1890
1891 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1892                                      u32 hcallid)
1893 {
1894         u64 hret;
1895         u8 reg_type;
1896
1897         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1898                  | EHEA_BCMC_UNTAGGED;
1899
1900         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1901                                      port->logical_port_id,
1902                                      reg_type, mc_mac_addr, 0, hcallid);
1903         if (hret)
1904                 goto out;
1905
1906         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1907                  | EHEA_BCMC_VLANID_ALL;
1908
1909         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1910                                      port->logical_port_id,
1911                                      reg_type, mc_mac_addr, 0, hcallid);
1912 out:
1913         return hret;
1914 }
1915
1916 static int ehea_drop_multicast_list(struct net_device *dev)
1917 {
1918         struct ehea_port *port = netdev_priv(dev);
1919         struct ehea_mc_list *mc_entry = port->mc_list;
1920         struct list_head *pos;
1921         struct list_head *temp;
1922         int ret = 0;
1923         u64 hret;
1924
1925         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1926                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1927
1928                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1929                                                  H_DEREG_BCMC);
1930                 if (hret) {
1931                         pr_err("failed deregistering mcast MAC\n");
1932                         ret = -EIO;
1933                 }
1934
1935                 list_del(pos);
1936                 kfree(mc_entry);
1937         }
1938         return ret;
1939 }
1940
1941 static void ehea_allmulti(struct net_device *dev, int enable)
1942 {
1943         struct ehea_port *port = netdev_priv(dev);
1944         u64 hret;
1945
1946         if (!port->allmulti) {
1947                 if (enable) {
1948                         /* Enable ALLMULTI */
1949                         ehea_drop_multicast_list(dev);
1950                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1951                         if (!hret)
1952                                 port->allmulti = 1;
1953                         else
1954                                 netdev_err(dev,
1955                                            "failed enabling IFF_ALLMULTI\n");
1956                 }
1957         } else
1958                 if (!enable) {
1959                         /* Disable ALLMULTI */
1960                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1961                         if (!hret)
1962                                 port->allmulti = 0;
1963                         else
1964                                 netdev_err(dev,
1965                                            "failed disabling IFF_ALLMULTI\n");
1966                 }
1967 }
1968
1969 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1970 {
1971         struct ehea_mc_list *ehea_mcl_entry;
1972         u64 hret;
1973
1974         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1975         if (!ehea_mcl_entry) {
1976                 pr_err("no mem for mcl_entry\n");
1977                 return;
1978         }
1979
1980         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1981
1982         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1983
1984         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1985                                          H_REG_BCMC);
1986         if (!hret)
1987                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1988         else {
1989                 pr_err("failed registering mcast MAC\n");
1990                 kfree(ehea_mcl_entry);
1991         }
1992 }
1993
1994 static void ehea_set_multicast_list(struct net_device *dev)
1995 {
1996         struct ehea_port *port = netdev_priv(dev);
1997         struct netdev_hw_addr *ha;
1998         int ret;
1999
2000         if (port->promisc) {
2001                 ehea_promiscuous(dev, 1);
2002                 return;
2003         }
2004         ehea_promiscuous(dev, 0);
2005
2006         if (dev->flags & IFF_ALLMULTI) {
2007                 ehea_allmulti(dev, 1);
2008                 goto out;
2009         }
2010         ehea_allmulti(dev, 0);
2011
2012         if (!netdev_mc_empty(dev)) {
2013                 ret = ehea_drop_multicast_list(dev);
2014                 if (ret) {
2015                         /* Dropping the current multicast list failed.
2016                          * Enabling ALL_MULTI is the best we can do.
2017                          */
2018                         ehea_allmulti(dev, 1);
2019                 }
2020
2021                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2022                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
2023                                 port->adapter->max_mc_mac);
2024                         goto out;
2025                 }
2026
2027                 netdev_for_each_mc_addr(ha, dev)
2028                         ehea_add_multicast_entry(port, ha->addr);
2029
2030         }
2031 out:
2032         ehea_update_bcmc_registrations();
2033 }
2034
2035 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2036 {
2037         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2038                 return -EINVAL;
2039         dev->mtu = new_mtu;
2040         return 0;
2041 }
2042
2043 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
2044 {
2045         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
2046
2047         if (skb->protocol != htons(ETH_P_IP))
2048                 return;
2049
2050         if (skb->ip_summed == CHECKSUM_PARTIAL)
2051                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
2052
2053         swqe->ip_start = skb_network_offset(skb);
2054         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
2055
2056         switch (ip_hdr(skb)->protocol) {
2057         case IPPROTO_UDP:
2058                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2059                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2060
2061                 swqe->tcp_offset = swqe->ip_end + 1 +
2062                                    offsetof(struct udphdr, check);
2063                 swqe->tcp_end = skb->len - 1;
2064                 break;
2065
2066         case IPPROTO_TCP:
2067                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2068                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2069
2070                 swqe->tcp_offset = swqe->ip_end + 1 +
2071                                    offsetof(struct tcphdr, check);
2072                 swqe->tcp_end = skb->len - 1;
2073                 break;
2074         }
2075 }
2076
2077 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2078                        struct ehea_swqe *swqe, u32 lkey)
2079 {
2080         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2081
2082         xmit_common(skb, swqe);
2083
2084         write_swqe2_data(skb, dev, swqe, lkey);
2085 }
2086
2087 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2088                        struct ehea_swqe *swqe)
2089 {
2090         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2091
2092         xmit_common(skb, swqe);
2093
2094         if (!skb->data_len)
2095                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2096         else
2097                 skb_copy_bits(skb, 0, imm_data, skb->len);
2098
2099         swqe->immediate_data_length = skb->len;
2100         dev_kfree_skb(skb);
2101 }
2102
2103 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2104 {
2105         struct ehea_port *port = netdev_priv(dev);
2106         struct ehea_swqe *swqe;
2107         u32 lkey;
2108         int swqe_index;
2109         struct ehea_port_res *pr;
2110         struct netdev_queue *txq;
2111
2112         pr = &port->port_res[skb_get_queue_mapping(skb)];
2113         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2114
2115         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2116         memset(swqe, 0, SWQE_HEADER_SIZE);
2117         atomic_dec(&pr->swqe_avail);
2118
2119         if (vlan_tx_tag_present(skb)) {
2120                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2121                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2122         }
2123
2124         pr->tx_packets++;
2125         pr->tx_bytes += skb->len;
2126
2127         if (skb->len <= SWQE3_MAX_IMM) {
2128                 u32 sig_iv = port->sig_comp_iv;
2129                 u32 swqe_num = pr->swqe_id_counter;
2130                 ehea_xmit3(skb, dev, swqe);
2131                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2132                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2133                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2134                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2135                                                       sig_iv);
2136                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2137                         pr->swqe_ll_count = 0;
2138                 } else
2139                         pr->swqe_ll_count += 1;
2140         } else {
2141                 swqe->wr_id =
2142                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2143                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2144                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2145                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2146                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2147
2148                 pr->sq_skba.index++;
2149                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2150
2151                 lkey = pr->send_mr.lkey;
2152                 ehea_xmit2(skb, dev, swqe, lkey);
2153                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2154         }
2155         pr->swqe_id_counter += 1;
2156
2157         netif_info(port, tx_queued, dev,
2158                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2159         if (netif_msg_tx_queued(port))
2160                 ehea_dump(swqe, 512, "swqe");
2161
2162         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2163                 netif_tx_stop_queue(txq);
2164                 swqe->tx_control |= EHEA_SWQE_PURGE;
2165         }
2166
2167         ehea_post_swqe(pr->qp, swqe);
2168
2169         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2170                 pr->p_stats.queue_stopped++;
2171                 netif_tx_stop_queue(txq);
2172         }
2173
2174         return NETDEV_TX_OK;
2175 }
2176
2177 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2178 {
2179         struct ehea_port *port = netdev_priv(dev);
2180         struct ehea_adapter *adapter = port->adapter;
2181         struct hcp_ehea_port_cb1 *cb1;
2182         int index;
2183         u64 hret;
2184
2185         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2186         if (!cb1) {
2187                 pr_err("no mem for cb1\n");
2188                 goto out;
2189         }
2190
2191         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2192                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2193         if (hret != H_SUCCESS) {
2194                 pr_err("query_ehea_port failed\n");
2195                 goto out;
2196         }
2197
2198         index = (vid / 64);
2199         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2200
2201         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2202                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2203         if (hret != H_SUCCESS)
2204                 pr_err("modify_ehea_port failed\n");
2205 out:
2206         free_page((unsigned long)cb1);
2207         return;
2208 }
2209
2210 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2211 {
2212         struct ehea_port *port = netdev_priv(dev);
2213         struct ehea_adapter *adapter = port->adapter;
2214         struct hcp_ehea_port_cb1 *cb1;
2215         int index;
2216         u64 hret;
2217
2218         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2219         if (!cb1) {
2220                 pr_err("no mem for cb1\n");
2221                 goto out;
2222         }
2223
2224         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2225                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2226         if (hret != H_SUCCESS) {
2227                 pr_err("query_ehea_port failed\n");
2228                 goto out;
2229         }
2230
2231         index = (vid / 64);
2232         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2233
2234         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2235                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2236         if (hret != H_SUCCESS)
2237                 pr_err("modify_ehea_port failed\n");
2238 out:
2239         free_page((unsigned long)cb1);
2240 }
2241
2242 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2243 {
2244         int ret = -EIO;
2245         u64 hret;
2246         u16 dummy16 = 0;
2247         u64 dummy64 = 0;
2248         struct hcp_modify_qp_cb0 *cb0;
2249
2250         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2251         if (!cb0) {
2252                 ret = -ENOMEM;
2253                 goto out;
2254         }
2255
2256         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2257                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2258         if (hret != H_SUCCESS) {
2259                 pr_err("query_ehea_qp failed (1)\n");
2260                 goto out;
2261         }
2262
2263         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2264         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2265                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2266                                      &dummy64, &dummy64, &dummy16, &dummy16);
2267         if (hret != H_SUCCESS) {
2268                 pr_err("modify_ehea_qp failed (1)\n");
2269                 goto out;
2270         }
2271
2272         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2273                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2274         if (hret != H_SUCCESS) {
2275                 pr_err("query_ehea_qp failed (2)\n");
2276                 goto out;
2277         }
2278
2279         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2280         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2281                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2282                                      &dummy64, &dummy64, &dummy16, &dummy16);
2283         if (hret != H_SUCCESS) {
2284                 pr_err("modify_ehea_qp failed (2)\n");
2285                 goto out;
2286         }
2287
2288         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2289                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2290         if (hret != H_SUCCESS) {
2291                 pr_err("query_ehea_qp failed (3)\n");
2292                 goto out;
2293         }
2294
2295         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2296         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2297                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2298                                      &dummy64, &dummy64, &dummy16, &dummy16);
2299         if (hret != H_SUCCESS) {
2300                 pr_err("modify_ehea_qp failed (3)\n");
2301                 goto out;
2302         }
2303
2304         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2305                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2306         if (hret != H_SUCCESS) {
2307                 pr_err("query_ehea_qp failed (4)\n");
2308                 goto out;
2309         }
2310
2311         ret = 0;
2312 out:
2313         free_page((unsigned long)cb0);
2314         return ret;
2315 }
2316
2317 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2318 {
2319         int ret, i;
2320         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2321         enum ehea_eq_type eq_type = EHEA_EQ;
2322
2323         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2324                                    EHEA_MAX_ENTRIES_EQ, 1);
2325         if (!port->qp_eq) {
2326                 ret = -EINVAL;
2327                 pr_err("ehea_create_eq failed (qp_eq)\n");
2328                 goto out_kill_eq;
2329         }
2330
2331         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2332         pr_cfg.max_entries_scq = sq_entries * 2;
2333         pr_cfg.max_entries_sq = sq_entries;
2334         pr_cfg.max_entries_rq1 = rq1_entries;
2335         pr_cfg.max_entries_rq2 = rq2_entries;
2336         pr_cfg.max_entries_rq3 = rq3_entries;
2337
2338         pr_cfg_small_rx.max_entries_rcq = 1;
2339         pr_cfg_small_rx.max_entries_scq = sq_entries;
2340         pr_cfg_small_rx.max_entries_sq = sq_entries;
2341         pr_cfg_small_rx.max_entries_rq1 = 1;
2342         pr_cfg_small_rx.max_entries_rq2 = 1;
2343         pr_cfg_small_rx.max_entries_rq3 = 1;
2344
2345         for (i = 0; i < def_qps; i++) {
2346                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2347                 if (ret)
2348                         goto out_clean_pr;
2349         }
2350         for (i = def_qps; i < def_qps; i++) {
2351                 ret = ehea_init_port_res(port, &port->port_res[i],
2352                                          &pr_cfg_small_rx, i);
2353                 if (ret)
2354                         goto out_clean_pr;
2355         }
2356
2357         return 0;
2358
2359 out_clean_pr:
2360         while (--i >= 0)
2361                 ehea_clean_portres(port, &port->port_res[i]);
2362
2363 out_kill_eq:
2364         ehea_destroy_eq(port->qp_eq);
2365         return ret;
2366 }
2367
2368 static int ehea_clean_all_portres(struct ehea_port *port)
2369 {
2370         int ret = 0;
2371         int i;
2372
2373         for (i = 0; i < port->num_def_qps; i++)
2374                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2375
2376         ret |= ehea_destroy_eq(port->qp_eq);
2377
2378         return ret;
2379 }
2380
2381 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2382 {
2383         if (adapter->active_ports)
2384                 return;
2385
2386         ehea_rem_mr(&adapter->mr);
2387 }
2388
2389 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2390 {
2391         if (adapter->active_ports)
2392                 return 0;
2393
2394         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2395 }
2396
2397 static int ehea_up(struct net_device *dev)
2398 {
2399         int ret, i;
2400         struct ehea_port *port = netdev_priv(dev);
2401
2402         if (port->state == EHEA_PORT_UP)
2403                 return 0;
2404
2405         ret = ehea_port_res_setup(port, port->num_def_qps);
2406         if (ret) {
2407                 netdev_err(dev, "port_res_failed\n");
2408                 goto out;
2409         }
2410
2411         /* Set default QP for this port */
2412         ret = ehea_configure_port(port);
2413         if (ret) {
2414                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2415                 goto out_clean_pr;
2416         }
2417
2418         ret = ehea_reg_interrupts(dev);
2419         if (ret) {
2420                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2421                 goto out_clean_pr;
2422         }
2423
2424         for (i = 0; i < port->num_def_qps; i++) {
2425                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2426                 if (ret) {
2427                         netdev_err(dev, "activate_qp failed\n");
2428                         goto out_free_irqs;
2429                 }
2430         }
2431
2432         for (i = 0; i < port->num_def_qps; i++) {
2433                 ret = ehea_fill_port_res(&port->port_res[i]);
2434                 if (ret) {
2435                         netdev_err(dev, "out_free_irqs\n");
2436                         goto out_free_irqs;
2437                 }
2438         }
2439
2440         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2441         if (ret) {
2442                 ret = -EIO;
2443                 goto out_free_irqs;
2444         }
2445
2446         port->state = EHEA_PORT_UP;
2447
2448         ret = 0;
2449         goto out;
2450
2451 out_free_irqs:
2452         ehea_free_interrupts(dev);
2453
2454 out_clean_pr:
2455         ehea_clean_all_portres(port);
2456 out:
2457         if (ret)
2458                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2459
2460         ehea_update_bcmc_registrations();
2461         ehea_update_firmware_handles();
2462
2463         return ret;
2464 }
2465
2466 static void port_napi_disable(struct ehea_port *port)
2467 {
2468         int i;
2469
2470         for (i = 0; i < port->num_def_qps; i++)
2471                 napi_disable(&port->port_res[i].napi);
2472 }
2473
2474 static void port_napi_enable(struct ehea_port *port)
2475 {
2476         int i;
2477
2478         for (i = 0; i < port->num_def_qps; i++)
2479                 napi_enable(&port->port_res[i].napi);
2480 }
2481
2482 static int ehea_open(struct net_device *dev)
2483 {
2484         int ret;
2485         struct ehea_port *port = netdev_priv(dev);
2486
2487         mutex_lock(&port->port_lock);
2488
2489         netif_info(port, ifup, dev, "enabling port\n");
2490
2491         ret = ehea_up(dev);
2492         if (!ret) {
2493                 port_napi_enable(port);
2494                 netif_tx_start_all_queues(dev);
2495         }
2496
2497         mutex_unlock(&port->port_lock);
2498         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
2499
2500         return ret;
2501 }
2502
2503 static int ehea_down(struct net_device *dev)
2504 {
2505         int ret;
2506         struct ehea_port *port = netdev_priv(dev);
2507
2508         if (port->state == EHEA_PORT_DOWN)
2509                 return 0;
2510
2511         ehea_drop_multicast_list(dev);
2512         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2513
2514         ehea_free_interrupts(dev);
2515
2516         port->state = EHEA_PORT_DOWN;
2517
2518         ehea_update_bcmc_registrations();
2519
2520         ret = ehea_clean_all_portres(port);
2521         if (ret)
2522                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2523
2524         ehea_update_firmware_handles();
2525
2526         return ret;
2527 }
2528
2529 static int ehea_stop(struct net_device *dev)
2530 {
2531         int ret;
2532         struct ehea_port *port = netdev_priv(dev);
2533
2534         netif_info(port, ifdown, dev, "disabling port\n");
2535
2536         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2537         cancel_work_sync(&port->reset_task);
2538         cancel_delayed_work_sync(&port->stats_work);
2539         mutex_lock(&port->port_lock);
2540         netif_tx_stop_all_queues(dev);
2541         port_napi_disable(port);
2542         ret = ehea_down(dev);
2543         mutex_unlock(&port->port_lock);
2544         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2545         return ret;
2546 }
2547
2548 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2549 {
2550         struct ehea_qp qp = *orig_qp;
2551         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2552         struct ehea_swqe *swqe;
2553         int wqe_index;
2554         int i;
2555
2556         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2557                 swqe = ehea_get_swqe(&qp, &wqe_index);
2558                 swqe->tx_control |= EHEA_SWQE_PURGE;
2559         }
2560 }
2561
2562 static void ehea_flush_sq(struct ehea_port *port)
2563 {
2564         int i;
2565
2566         for (i = 0; i < port->num_def_qps; i++) {
2567                 struct ehea_port_res *pr = &port->port_res[i];
2568                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2569                 int ret;
2570
2571                 ret = wait_event_timeout(port->swqe_avail_wq,
2572                          atomic_read(&pr->swqe_avail) >= swqe_max,
2573                          msecs_to_jiffies(100));
2574
2575                 if (!ret) {
2576                         pr_err("WARNING: sq not flushed completely\n");
2577                         break;
2578                 }
2579         }
2580 }
2581
2582 int ehea_stop_qps(struct net_device *dev)
2583 {
2584         struct ehea_port *port = netdev_priv(dev);
2585         struct ehea_adapter *adapter = port->adapter;
2586         struct hcp_modify_qp_cb0 *cb0;
2587         int ret = -EIO;
2588         int dret;
2589         int i;
2590         u64 hret;
2591         u64 dummy64 = 0;
2592         u16 dummy16 = 0;
2593
2594         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2595         if (!cb0) {
2596                 ret = -ENOMEM;
2597                 goto out;
2598         }
2599
2600         for (i = 0; i < (port->num_def_qps); i++) {
2601                 struct ehea_port_res *pr =  &port->port_res[i];
2602                 struct ehea_qp *qp = pr->qp;
2603
2604                 /* Purge send queue */
2605                 ehea_purge_sq(qp);
2606
2607                 /* Disable queue pair */
2608                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2609                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2610                                             cb0);
2611                 if (hret != H_SUCCESS) {
2612                         pr_err("query_ehea_qp failed (1)\n");
2613                         goto out;
2614                 }
2615
2616                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2617                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2618
2619                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2620                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2621                                                             1), cb0, &dummy64,
2622                                              &dummy64, &dummy16, &dummy16);
2623                 if (hret != H_SUCCESS) {
2624                         pr_err("modify_ehea_qp failed (1)\n");
2625                         goto out;
2626                 }
2627
2628                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2629                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2630                                             cb0);
2631                 if (hret != H_SUCCESS) {
2632                         pr_err("query_ehea_qp failed (2)\n");
2633                         goto out;
2634                 }
2635
2636                 /* deregister shared memory regions */
2637                 dret = ehea_rem_smrs(pr);
2638                 if (dret) {
2639                         pr_err("unreg shared memory region failed\n");
2640                         goto out;
2641                 }
2642         }
2643
2644         ret = 0;
2645 out:
2646         free_page((unsigned long)cb0);
2647
2648         return ret;
2649 }
2650
2651 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2652 {
2653         struct ehea_qp qp = *orig_qp;
2654         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2655         struct ehea_rwqe *rwqe;
2656         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2657         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2658         struct sk_buff *skb;
2659         u32 lkey = pr->recv_mr.lkey;
2660
2661
2662         int i;
2663         int index;
2664
2665         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2666                 rwqe = ehea_get_next_rwqe(&qp, 2);
2667                 rwqe->sg_list[0].l_key = lkey;
2668                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2669                 skb = skba_rq2[index];
2670                 if (skb)
2671                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2672         }
2673
2674         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2675                 rwqe = ehea_get_next_rwqe(&qp, 3);
2676                 rwqe->sg_list[0].l_key = lkey;
2677                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2678                 skb = skba_rq3[index];
2679                 if (skb)
2680                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2681         }
2682 }
2683
2684 int ehea_restart_qps(struct net_device *dev)
2685 {
2686         struct ehea_port *port = netdev_priv(dev);
2687         struct ehea_adapter *adapter = port->adapter;
2688         int ret = 0;
2689         int i;
2690
2691         struct hcp_modify_qp_cb0 *cb0;
2692         u64 hret;
2693         u64 dummy64 = 0;
2694         u16 dummy16 = 0;
2695
2696         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2697         if (!cb0) {
2698                 ret = -ENOMEM;
2699                 goto out;
2700         }
2701
2702         for (i = 0; i < (port->num_def_qps); i++) {
2703                 struct ehea_port_res *pr =  &port->port_res[i];
2704                 struct ehea_qp *qp = pr->qp;
2705
2706                 ret = ehea_gen_smrs(pr);
2707                 if (ret) {
2708                         netdev_err(dev, "creation of shared memory regions failed\n");
2709                         goto out;
2710                 }
2711
2712                 ehea_update_rqs(qp, pr);
2713
2714                 /* Enable queue pair */
2715                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2716                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2717                                             cb0);
2718                 if (hret != H_SUCCESS) {
2719                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2720                         goto out;
2721                 }
2722
2723                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2724                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2725
2726                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2727                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2728                                                             1), cb0, &dummy64,
2729                                              &dummy64, &dummy16, &dummy16);
2730                 if (hret != H_SUCCESS) {
2731                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2732                         goto out;
2733                 }
2734
2735                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2736                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2737                                             cb0);
2738                 if (hret != H_SUCCESS) {
2739                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2740                         goto out;
2741                 }
2742
2743                 /* refill entire queue */
2744                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2745                 ehea_refill_rq2(pr, 0);
2746                 ehea_refill_rq3(pr, 0);
2747         }
2748 out:
2749         free_page((unsigned long)cb0);
2750
2751         return ret;
2752 }
2753
2754 static void ehea_reset_port(struct work_struct *work)
2755 {
2756         int ret;
2757         struct ehea_port *port =
2758                 container_of(work, struct ehea_port, reset_task);
2759         struct net_device *dev = port->netdev;
2760
2761         mutex_lock(&dlpar_mem_lock);
2762         port->resets++;
2763         mutex_lock(&port->port_lock);
2764         netif_tx_disable(dev);
2765
2766         port_napi_disable(port);
2767
2768         ehea_down(dev);
2769
2770         ret = ehea_up(dev);
2771         if (ret)
2772                 goto out;
2773
2774         ehea_set_multicast_list(dev);
2775
2776         netif_info(port, timer, dev, "reset successful\n");
2777
2778         port_napi_enable(port);
2779
2780         netif_tx_wake_all_queues(dev);
2781 out:
2782         mutex_unlock(&port->port_lock);
2783         mutex_unlock(&dlpar_mem_lock);
2784 }
2785
2786 static void ehea_rereg_mrs(void)
2787 {
2788         int ret, i;
2789         struct ehea_adapter *adapter;
2790
2791         pr_info("LPAR memory changed - re-initializing driver\n");
2792
2793         list_for_each_entry(adapter, &adapter_list, list)
2794                 if (adapter->active_ports) {
2795                         /* Shutdown all ports */
2796                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2797                                 struct ehea_port *port = adapter->port[i];
2798                                 struct net_device *dev;
2799
2800                                 if (!port)
2801                                         continue;
2802
2803                                 dev = port->netdev;
2804
2805                                 if (dev->flags & IFF_UP) {
2806                                         mutex_lock(&port->port_lock);
2807                                         netif_tx_disable(dev);
2808                                         ehea_flush_sq(port);
2809                                         ret = ehea_stop_qps(dev);
2810                                         if (ret) {
2811                                                 mutex_unlock(&port->port_lock);
2812                                                 goto out;
2813                                         }
2814                                         port_napi_disable(port);
2815                                         mutex_unlock(&port->port_lock);
2816                                 }
2817                                 reset_sq_restart_flag(port);
2818                         }
2819
2820                         /* Unregister old memory region */
2821                         ret = ehea_rem_mr(&adapter->mr);
2822                         if (ret) {
2823                                 pr_err("unregister MR failed - driver inoperable!\n");
2824                                 goto out;
2825                         }
2826                 }
2827
2828         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2829
2830         list_for_each_entry(adapter, &adapter_list, list)
2831                 if (adapter->active_ports) {
2832                         /* Register new memory region */
2833                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2834                         if (ret) {
2835                                 pr_err("register MR failed - driver inoperable!\n");
2836                                 goto out;
2837                         }
2838
2839                         /* Restart all ports */
2840                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2841                                 struct ehea_port *port = adapter->port[i];
2842
2843                                 if (port) {
2844                                         struct net_device *dev = port->netdev;
2845
2846                                         if (dev->flags & IFF_UP) {
2847                                                 mutex_lock(&port->port_lock);
2848                                                 ret = ehea_restart_qps(dev);
2849                                                 if (!ret) {
2850                                                         check_sqs(port);
2851                                                         port_napi_enable(port);
2852                                                         netif_tx_wake_all_queues(dev);
2853                                                 } else {
2854                                                         netdev_err(dev, "Unable to restart QPS\n");
2855                                                 }
2856                                                 mutex_unlock(&port->port_lock);
2857                                         }
2858                                 }
2859                         }
2860                 }
2861         pr_info("re-initializing driver complete\n");
2862 out:
2863         return;
2864 }
2865
2866 static void ehea_tx_watchdog(struct net_device *dev)
2867 {
2868         struct ehea_port *port = netdev_priv(dev);
2869
2870         if (netif_carrier_ok(dev) &&
2871             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2872                 ehea_schedule_port_reset(port);
2873 }
2874
2875 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2876 {
2877         struct hcp_query_ehea *cb;
2878         u64 hret;
2879         int ret;
2880
2881         cb = (void *)get_zeroed_page(GFP_KERNEL);
2882         if (!cb) {
2883                 ret = -ENOMEM;
2884                 goto out;
2885         }
2886
2887         hret = ehea_h_query_ehea(adapter->handle, cb);
2888
2889         if (hret != H_SUCCESS) {
2890                 ret = -EIO;
2891                 goto out_herr;
2892         }
2893
2894         adapter->max_mc_mac = cb->max_mc_mac - 1;
2895         ret = 0;
2896
2897 out_herr:
2898         free_page((unsigned long)cb);
2899 out:
2900         return ret;
2901 }
2902
2903 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2904 {
2905         struct hcp_ehea_port_cb4 *cb4;
2906         u64 hret;
2907         int ret = 0;
2908
2909         *jumbo = 0;
2910
2911         /* (Try to) enable *jumbo frames */
2912         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2913         if (!cb4) {
2914                 pr_err("no mem for cb4\n");
2915                 ret = -ENOMEM;
2916                 goto out;
2917         } else {
2918                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2919                                               port->logical_port_id,
2920                                               H_PORT_CB4,
2921                                               H_PORT_CB4_JUMBO, cb4);
2922                 if (hret == H_SUCCESS) {
2923                         if (cb4->jumbo_frame)
2924                                 *jumbo = 1;
2925                         else {
2926                                 cb4->jumbo_frame = 1;
2927                                 hret = ehea_h_modify_ehea_port(port->adapter->
2928                                                                handle,
2929                                                                port->
2930                                                                logical_port_id,
2931                                                                H_PORT_CB4,
2932                                                                H_PORT_CB4_JUMBO,
2933                                                                cb4);
2934                                 if (hret == H_SUCCESS)
2935                                         *jumbo = 1;
2936                         }
2937                 } else
2938                         ret = -EINVAL;
2939
2940                 free_page((unsigned long)cb4);
2941         }
2942 out:
2943         return ret;
2944 }
2945
2946 static ssize_t ehea_show_port_id(struct device *dev,
2947                                  struct device_attribute *attr, char *buf)
2948 {
2949         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2950         return sprintf(buf, "%d", port->logical_port_id);
2951 }
2952
2953 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2954                    NULL);
2955
2956 static void __devinit logical_port_release(struct device *dev)
2957 {
2958         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2959         of_node_put(port->ofdev.dev.of_node);
2960 }
2961
2962 static struct device *ehea_register_port(struct ehea_port *port,
2963                                          struct device_node *dn)
2964 {
2965         int ret;
2966
2967         port->ofdev.dev.of_node = of_node_get(dn);
2968         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2969         port->ofdev.dev.bus = &ibmebus_bus_type;
2970
2971         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2972         port->ofdev.dev.release = logical_port_release;
2973
2974         ret = of_device_register(&port->ofdev);
2975         if (ret) {
2976                 pr_err("failed to register device. ret=%d\n", ret);
2977                 goto out;
2978         }
2979
2980         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2981         if (ret) {
2982                 pr_err("failed to register attributes, ret=%d\n", ret);
2983                 goto out_unreg_of_dev;
2984         }
2985
2986         return &port->ofdev.dev;
2987
2988 out_unreg_of_dev:
2989         of_device_unregister(&port->ofdev);
2990 out:
2991         return NULL;
2992 }
2993
2994 static void ehea_unregister_port(struct ehea_port *port)
2995 {
2996         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2997         of_device_unregister(&port->ofdev);
2998 }
2999
3000 static const struct net_device_ops ehea_netdev_ops = {
3001         .ndo_open               = ehea_open,
3002         .ndo_stop               = ehea_stop,
3003         .ndo_start_xmit         = ehea_start_xmit,
3004 #ifdef CONFIG_NET_POLL_CONTROLLER
3005         .ndo_poll_controller    = ehea_netpoll,
3006 #endif
3007         .ndo_get_stats64        = ehea_get_stats64,
3008         .ndo_set_mac_address    = ehea_set_mac_addr,
3009         .ndo_validate_addr      = eth_validate_addr,
3010         .ndo_set_rx_mode        = ehea_set_multicast_list,
3011         .ndo_change_mtu         = ehea_change_mtu,
3012         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3013         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3014         .ndo_tx_timeout         = ehea_tx_watchdog,
3015 };
3016
3017 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3018                                          u32 logical_port_id,
3019                                          struct device_node *dn)
3020 {
3021         int ret;
3022         struct net_device *dev;
3023         struct ehea_port *port;
3024         struct device *port_dev;
3025         int jumbo;
3026
3027         /* allocate memory for the port structures */
3028         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
3029
3030         if (!dev) {
3031                 pr_err("no mem for net_device\n");
3032                 ret = -ENOMEM;
3033                 goto out_err;
3034         }
3035
3036         port = netdev_priv(dev);
3037
3038         mutex_init(&port->port_lock);
3039         port->state = EHEA_PORT_DOWN;
3040         port->sig_comp_iv = sq_entries / 10;
3041
3042         port->adapter = adapter;
3043         port->netdev = dev;
3044         port->logical_port_id = logical_port_id;
3045
3046         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3047
3048         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3049         if (!port->mc_list) {
3050                 ret = -ENOMEM;
3051                 goto out_free_ethdev;
3052         }
3053
3054         INIT_LIST_HEAD(&port->mc_list->list);
3055
3056         ret = ehea_sense_port_attr(port);
3057         if (ret)
3058                 goto out_free_mc_list;
3059
3060         netif_set_real_num_rx_queues(dev, port->num_def_qps);
3061         netif_set_real_num_tx_queues(dev, port->num_def_qps);
3062
3063         port_dev = ehea_register_port(port, dn);
3064         if (!port_dev)
3065                 goto out_free_mc_list;
3066
3067         SET_NETDEV_DEV(dev, port_dev);
3068
3069         /* initialize net_device structure */
3070         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3071
3072         dev->netdev_ops = &ehea_netdev_ops;
3073         ehea_set_ethtool_ops(dev);
3074
3075         dev->hw_features = NETIF_F_SG | NETIF_F_TSO
3076                       | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3077         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3078                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3079                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3080                       | NETIF_F_RXCSUM;
3081         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3082                         NETIF_F_IP_CSUM;
3083         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3084
3085         if (use_lro)
3086                 dev->features |= NETIF_F_LRO;
3087
3088         INIT_WORK(&port->reset_task, ehea_reset_port);
3089         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3090
3091         init_waitqueue_head(&port->swqe_avail_wq);
3092         init_waitqueue_head(&port->restart_wq);
3093
3094         memset(&port->stats, 0, sizeof(struct net_device_stats));
3095         ret = register_netdev(dev);
3096         if (ret) {
3097                 pr_err("register_netdev failed. ret=%d\n", ret);
3098                 goto out_unreg_port;
3099         }
3100
3101         port->lro_max_aggr = lro_max_aggr;
3102
3103         ret = ehea_get_jumboframe_status(port, &jumbo);
3104         if (ret)
3105                 netdev_err(dev, "failed determining jumbo frame status\n");
3106
3107         netdev_info(dev, "Jumbo frames are %sabled\n",
3108                     jumbo == 1 ? "en" : "dis");
3109
3110         adapter->active_ports++;
3111
3112         return port;
3113
3114 out_unreg_port:
3115         ehea_unregister_port(port);
3116
3117 out_free_mc_list:
3118         kfree(port->mc_list);
3119
3120 out_free_ethdev:
3121         free_netdev(dev);
3122
3123 out_err:
3124         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3125                logical_port_id, ret);
3126         return NULL;
3127 }
3128
3129 static void ehea_shutdown_single_port(struct ehea_port *port)
3130 {
3131         struct ehea_adapter *adapter = port->adapter;
3132
3133         cancel_work_sync(&port->reset_task);
3134         cancel_delayed_work_sync(&port->stats_work);
3135         unregister_netdev(port->netdev);
3136         ehea_unregister_port(port);
3137         kfree(port->mc_list);
3138         free_netdev(port->netdev);
3139         adapter->active_ports--;
3140 }
3141
3142 static int ehea_setup_ports(struct ehea_adapter *adapter)
3143 {
3144         struct device_node *lhea_dn;
3145         struct device_node *eth_dn = NULL;
3146
3147         const u32 *dn_log_port_id;
3148         int i = 0;
3149
3150         lhea_dn = adapter->ofdev->dev.of_node;
3151         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3152
3153                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3154                                                  NULL);
3155                 if (!dn_log_port_id) {
3156                         pr_err("bad device node: eth_dn name=%s\n",
3157                                eth_dn->full_name);
3158                         continue;
3159                 }
3160
3161                 if (ehea_add_adapter_mr(adapter)) {
3162                         pr_err("creating MR failed\n");
3163                         of_node_put(eth_dn);
3164                         return -EIO;
3165                 }
3166
3167                 adapter->port[i] = ehea_setup_single_port(adapter,
3168                                                           *dn_log_port_id,
3169                                                           eth_dn);
3170                 if (adapter->port[i])
3171                         netdev_info(adapter->port[i]->netdev,
3172                                     "logical port id #%d\n", *dn_log_port_id);
3173                 else
3174                         ehea_remove_adapter_mr(adapter);
3175
3176                 i++;
3177         }
3178         return 0;
3179 }
3180
3181 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3182                                            u32 logical_port_id)
3183 {
3184         struct device_node *lhea_dn;
3185         struct device_node *eth_dn = NULL;
3186         const u32 *dn_log_port_id;
3187
3188         lhea_dn = adapter->ofdev->dev.of_node;
3189         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3190
3191                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3192                                                  NULL);
3193                 if (dn_log_port_id)
3194                         if (*dn_log_port_id == logical_port_id)
3195                                 return eth_dn;
3196         }
3197
3198         return NULL;
3199 }
3200
3201 static ssize_t ehea_probe_port(struct device *dev,
3202                                struct device_attribute *attr,
3203                                const char *buf, size_t count)
3204 {
3205         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3206         struct ehea_port *port;
3207         struct device_node *eth_dn = NULL;
3208         int i;
3209
3210         u32 logical_port_id;
3211
3212         sscanf(buf, "%d", &logical_port_id);
3213
3214         port = ehea_get_port(adapter, logical_port_id);
3215
3216         if (port) {
3217                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3218                             logical_port_id);
3219                 return -EINVAL;
3220         }
3221
3222         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3223
3224         if (!eth_dn) {
3225                 pr_info("no logical port with id %d found\n", logical_port_id);
3226                 return -EINVAL;
3227         }
3228
3229         if (ehea_add_adapter_mr(adapter)) {
3230                 pr_err("creating MR failed\n");
3231                 return -EIO;
3232         }
3233
3234         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3235
3236         of_node_put(eth_dn);
3237
3238         if (port) {
3239                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3240                         if (!adapter->port[i]) {
3241                                 adapter->port[i] = port;
3242                                 break;
3243                         }
3244
3245                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3246                             logical_port_id);
3247         } else {
3248                 ehea_remove_adapter_mr(adapter);
3249                 return -EIO;
3250         }
3251
3252         return (ssize_t) count;
3253 }
3254
3255 static ssize_t ehea_remove_port(struct device *dev,
3256                                 struct device_attribute *attr,
3257                                 const char *buf, size_t count)
3258 {
3259         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3260         struct ehea_port *port;
3261         int i;
3262         u32 logical_port_id;
3263
3264         sscanf(buf, "%d", &logical_port_id);
3265
3266         port = ehea_get_port(adapter, logical_port_id);
3267
3268         if (port) {
3269                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3270                             logical_port_id);
3271
3272                 ehea_shutdown_single_port(port);
3273
3274                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3275                         if (adapter->port[i] == port) {
3276                                 adapter->port[i] = NULL;
3277                                 break;
3278                         }
3279         } else {
3280                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3281                        logical_port_id);
3282                 return -EINVAL;
3283         }
3284
3285         ehea_remove_adapter_mr(adapter);
3286
3287         return (ssize_t) count;
3288 }
3289
3290 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3291 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3292
3293 int ehea_create_device_sysfs(struct platform_device *dev)
3294 {
3295         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3296         if (ret)
3297                 goto out;
3298
3299         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3300 out:
3301         return ret;
3302 }
3303
3304 void ehea_remove_device_sysfs(struct platform_device *dev)
3305 {
3306         device_remove_file(&dev->dev, &dev_attr_probe_port);
3307         device_remove_file(&dev->dev, &dev_attr_remove_port);
3308 }
3309
3310 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3311                                         const struct of_device_id *id)
3312 {
3313         struct ehea_adapter *adapter;
3314         const u64 *adapter_handle;
3315         int ret;
3316
3317         if (!dev || !dev->dev.of_node) {
3318                 pr_err("Invalid ibmebus device probed\n");
3319                 return -EINVAL;
3320         }
3321
3322         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3323         if (!adapter) {
3324                 ret = -ENOMEM;
3325                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3326                 goto out;
3327         }
3328
3329         list_add(&adapter->list, &adapter_list);
3330
3331         adapter->ofdev = dev;
3332
3333         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3334                                          NULL);
3335         if (adapter_handle)
3336                 adapter->handle = *adapter_handle;
3337
3338         if (!adapter->handle) {
3339                 dev_err(&dev->dev, "failed getting handle for adapter"
3340                         " '%s'\n", dev->dev.of_node->full_name);
3341                 ret = -ENODEV;
3342                 goto out_free_ad;
3343         }
3344
3345         adapter->pd = EHEA_PD_ID;
3346
3347         dev_set_drvdata(&dev->dev, adapter);
3348
3349
3350         /* initialize adapter and ports */
3351         /* get adapter properties */
3352         ret = ehea_sense_adapter_attr(adapter);
3353         if (ret) {
3354                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3355                 goto out_free_ad;
3356         }
3357
3358         adapter->neq = ehea_create_eq(adapter,
3359                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3360         if (!adapter->neq) {
3361                 ret = -EIO;
3362                 dev_err(&dev->dev, "NEQ creation failed\n");
3363                 goto out_free_ad;
3364         }
3365
3366         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3367                      (unsigned long)adapter);
3368
3369         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3370                                   ehea_interrupt_neq, IRQF_DISABLED,
3371                                   "ehea_neq", adapter);
3372         if (ret) {
3373                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3374                 goto out_kill_eq;
3375         }
3376
3377         ret = ehea_create_device_sysfs(dev);
3378         if (ret)
3379                 goto out_free_irq;
3380
3381         ret = ehea_setup_ports(adapter);
3382         if (ret) {
3383                 dev_err(&dev->dev, "setup_ports failed\n");
3384                 goto out_rem_dev_sysfs;
3385         }
3386
3387         ret = 0;
3388         goto out;
3389
3390 out_rem_dev_sysfs:
3391         ehea_remove_device_sysfs(dev);
3392
3393 out_free_irq:
3394         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3395
3396 out_kill_eq:
3397         ehea_destroy_eq(adapter->neq);
3398
3399 out_free_ad:
3400         list_del(&adapter->list);
3401         kfree(adapter);
3402
3403 out:
3404         ehea_update_firmware_handles();
3405
3406         return ret;
3407 }
3408
3409 static int __devexit ehea_remove(struct platform_device *dev)
3410 {
3411         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3412         int i;
3413
3414         for (i = 0; i < EHEA_MAX_PORTS; i++)
3415                 if (adapter->port[i]) {
3416                         ehea_shutdown_single_port(adapter->port[i]);
3417                         adapter->port[i] = NULL;
3418                 }
3419
3420         ehea_remove_device_sysfs(dev);
3421
3422         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3423         tasklet_kill(&adapter->neq_tasklet);
3424
3425         ehea_destroy_eq(adapter->neq);
3426         ehea_remove_adapter_mr(adapter);
3427         list_del(&adapter->list);
3428         kfree(adapter);
3429
3430         ehea_update_firmware_handles();
3431
3432         return 0;
3433 }
3434
3435 void ehea_crash_handler(void)
3436 {
3437         int i;
3438
3439         if (ehea_fw_handles.arr)
3440                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3441                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3442                                              ehea_fw_handles.arr[i].fwh,
3443                                              FORCE_FREE);
3444
3445         if (ehea_bcmc_regs.arr)
3446                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3447                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3448                                               ehea_bcmc_regs.arr[i].port_id,
3449                                               ehea_bcmc_regs.arr[i].reg_type,
3450                                               ehea_bcmc_regs.arr[i].macaddr,
3451                                               0, H_DEREG_BCMC);
3452 }
3453
3454 static int ehea_mem_notifier(struct notifier_block *nb,
3455                              unsigned long action, void *data)
3456 {
3457         int ret = NOTIFY_BAD;
3458         struct memory_notify *arg = data;
3459
3460         mutex_lock(&dlpar_mem_lock);
3461
3462         switch (action) {
3463         case MEM_CANCEL_OFFLINE:
3464                 pr_info("memory offlining canceled");
3465                 /* Readd canceled memory block */
3466         case MEM_ONLINE:
3467                 pr_info("memory is going online");
3468                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3469                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3470                         goto out_unlock;
3471                 ehea_rereg_mrs();
3472                 break;
3473         case MEM_GOING_OFFLINE:
3474                 pr_info("memory is going offline");
3475                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3476                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3477                         goto out_unlock;
3478                 ehea_rereg_mrs();
3479                 break;
3480         default:
3481                 break;
3482         }
3483
3484         ehea_update_firmware_handles();
3485         ret = NOTIFY_OK;
3486
3487 out_unlock:
3488         mutex_unlock(&dlpar_mem_lock);
3489         return ret;
3490 }
3491
3492 static struct notifier_block ehea_mem_nb = {
3493         .notifier_call = ehea_mem_notifier,
3494 };
3495
3496 static int ehea_reboot_notifier(struct notifier_block *nb,
3497                                 unsigned long action, void *unused)
3498 {
3499         if (action == SYS_RESTART) {
3500                 pr_info("Reboot: freeing all eHEA resources\n");
3501                 ibmebus_unregister_driver(&ehea_driver);
3502         }
3503         return NOTIFY_DONE;
3504 }
3505
3506 static struct notifier_block ehea_reboot_nb = {
3507         .notifier_call = ehea_reboot_notifier,
3508 };
3509
3510 static int check_module_parm(void)
3511 {
3512         int ret = 0;
3513
3514         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3515             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3516                 pr_info("Bad parameter: rq1_entries\n");
3517                 ret = -EINVAL;
3518         }
3519         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3520             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3521                 pr_info("Bad parameter: rq2_entries\n");
3522                 ret = -EINVAL;
3523         }
3524         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3525             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3526                 pr_info("Bad parameter: rq3_entries\n");
3527                 ret = -EINVAL;
3528         }
3529         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3530             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3531                 pr_info("Bad parameter: sq_entries\n");
3532                 ret = -EINVAL;
3533         }
3534
3535         return ret;
3536 }
3537
3538 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3539                                       char *buf)
3540 {
3541         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3542 }
3543
3544 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3545                    ehea_show_capabilities, NULL);
3546
3547 int __init ehea_module_init(void)
3548 {
3549         int ret;
3550
3551         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3552
3553         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3554         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3555
3556         mutex_init(&ehea_fw_handles.lock);
3557         spin_lock_init(&ehea_bcmc_regs.lock);
3558
3559         ret = check_module_parm();
3560         if (ret)
3561                 goto out;
3562
3563         ret = ehea_create_busmap();
3564         if (ret)
3565                 goto out;
3566
3567         ret = register_reboot_notifier(&ehea_reboot_nb);
3568         if (ret)
3569                 pr_info("failed registering reboot notifier\n");
3570
3571         ret = register_memory_notifier(&ehea_mem_nb);
3572         if (ret)
3573                 pr_info("failed registering memory remove notifier\n");
3574
3575         ret = crash_shutdown_register(ehea_crash_handler);
3576         if (ret)
3577                 pr_info("failed registering crash handler\n");
3578
3579         ret = ibmebus_register_driver(&ehea_driver);
3580         if (ret) {
3581                 pr_err("failed registering eHEA device driver on ebus\n");
3582                 goto out2;
3583         }
3584
3585         ret = driver_create_file(&ehea_driver.driver,
3586                                  &driver_attr_capabilities);
3587         if (ret) {
3588                 pr_err("failed to register capabilities attribute, ret=%d\n",
3589                        ret);
3590                 goto out3;
3591         }
3592
3593         return ret;
3594
3595 out3:
3596         ibmebus_unregister_driver(&ehea_driver);
3597 out2:
3598         unregister_memory_notifier(&ehea_mem_nb);
3599         unregister_reboot_notifier(&ehea_reboot_nb);
3600         crash_shutdown_unregister(ehea_crash_handler);
3601 out:
3602         return ret;
3603 }
3604
3605 static void __exit ehea_module_exit(void)
3606 {
3607         int ret;
3608
3609         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3610         ibmebus_unregister_driver(&ehea_driver);
3611         unregister_reboot_notifier(&ehea_reboot_nb);
3612         ret = crash_shutdown_unregister(ehea_crash_handler);
3613         if (ret)
3614                 pr_info("failed unregistering crash handler\n");
3615         unregister_memory_notifier(&ehea_mem_nb);
3616         kfree(ehea_fw_handles.arr);
3617         kfree(ehea_bcmc_regs.arr);
3618         ehea_destroy_busmap();
3619 }
3620
3621 module_init(ehea_module_init);
3622 module_exit(ehea_module_exit);