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 net_device_stats *ehea_get_stats(struct net_device *dev)
 327 {
 328         struct ehea_port *port = netdev_priv(dev);
 329         struct net_device_stats *stats = &port->stats;
 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 net_device_stats *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         int nfrags = skb_shinfo(skb)->nr_frags;
2091         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2092         skb_frag_t *frag;
2093         int i;
2094
2095         xmit_common(skb, swqe);
2096
2097         if (nfrags == 0) {
2098                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2099         } else {
2100                 skb_copy_from_linear_data(skb, imm_data,
2101                                           skb_headlen(skb));
2102                 imm_data += skb_headlen(skb);
2103
2104                 /* ... then copy data from the fragments */
2105                 for (i = 0; i < nfrags; i++) {
2106                         frag = &skb_shinfo(skb)->frags[i];
2107                         memcpy(imm_data, skb_frag_address(frag), frag->size);
2108                         imm_data += frag->size;
2109                 }
2110         }
2111
2112         swqe->immediate_data_length = skb->len;
2113         dev_kfree_skb(skb);
2114 }
2115
2116 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2117 {
2118         struct ehea_port *port = netdev_priv(dev);
2119         struct ehea_swqe *swqe;
2120         u32 lkey;
2121         int swqe_index;
2122         struct ehea_port_res *pr;
2123         struct netdev_queue *txq;
2124
2125         pr = &port->port_res[skb_get_queue_mapping(skb)];
2126         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2127
2128         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2129         memset(swqe, 0, SWQE_HEADER_SIZE);
2130         atomic_dec(&pr->swqe_avail);
2131
2132         if (vlan_tx_tag_present(skb)) {
2133                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2134                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2135         }
2136
2137         pr->tx_packets++;
2138         pr->tx_bytes += skb->len;
2139
2140         if (skb->len <= SWQE3_MAX_IMM) {
2141                 u32 sig_iv = port->sig_comp_iv;
2142                 u32 swqe_num = pr->swqe_id_counter;
2143                 ehea_xmit3(skb, dev, swqe);
2144                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2145                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2146                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2147                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2148                                                       sig_iv);
2149                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2150                         pr->swqe_ll_count = 0;
2151                 } else
2152                         pr->swqe_ll_count += 1;
2153         } else {
2154                 swqe->wr_id =
2155                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2156                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2157                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2158                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2159                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2160
2161                 pr->sq_skba.index++;
2162                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2163
2164                 lkey = pr->send_mr.lkey;
2165                 ehea_xmit2(skb, dev, swqe, lkey);
2166                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2167         }
2168         pr->swqe_id_counter += 1;
2169
2170         netif_info(port, tx_queued, dev,
2171                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2172         if (netif_msg_tx_queued(port))
2173                 ehea_dump(swqe, 512, "swqe");
2174
2175         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2176                 netif_tx_stop_queue(txq);
2177                 swqe->tx_control |= EHEA_SWQE_PURGE;
2178         }
2179
2180         ehea_post_swqe(pr->qp, swqe);
2181
2182         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2183                 pr->p_stats.queue_stopped++;
2184                 netif_tx_stop_queue(txq);
2185         }
2186
2187         return NETDEV_TX_OK;
2188 }
2189
2190 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2191 {
2192         struct ehea_port *port = netdev_priv(dev);
2193         struct ehea_adapter *adapter = port->adapter;
2194         struct hcp_ehea_port_cb1 *cb1;
2195         int index;
2196         u64 hret;
2197
2198         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2199         if (!cb1) {
2200                 pr_err("no mem for cb1\n");
2201                 goto out;
2202         }
2203
2204         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2205                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2206         if (hret != H_SUCCESS) {
2207                 pr_err("query_ehea_port failed\n");
2208                 goto out;
2209         }
2210
2211         index = (vid / 64);
2212         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2213
2214         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2215                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2216         if (hret != H_SUCCESS)
2217                 pr_err("modify_ehea_port failed\n");
2218 out:
2219         free_page((unsigned long)cb1);
2220         return;
2221 }
2222
2223 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2224 {
2225         struct ehea_port *port = netdev_priv(dev);
2226         struct ehea_adapter *adapter = port->adapter;
2227         struct hcp_ehea_port_cb1 *cb1;
2228         int index;
2229         u64 hret;
2230
2231         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2232         if (!cb1) {
2233                 pr_err("no mem for cb1\n");
2234                 goto out;
2235         }
2236
2237         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2238                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2239         if (hret != H_SUCCESS) {
2240                 pr_err("query_ehea_port failed\n");
2241                 goto out;
2242         }
2243
2244         index = (vid / 64);
2245         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2246
2247         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2248                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2249         if (hret != H_SUCCESS)
2250                 pr_err("modify_ehea_port failed\n");
2251 out:
2252         free_page((unsigned long)cb1);
2253 }
2254
2255 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2256 {
2257         int ret = -EIO;
2258         u64 hret;
2259         u16 dummy16 = 0;
2260         u64 dummy64 = 0;
2261         struct hcp_modify_qp_cb0 *cb0;
2262
2263         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2264         if (!cb0) {
2265                 ret = -ENOMEM;
2266                 goto out;
2267         }
2268
2269         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2270                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2271         if (hret != H_SUCCESS) {
2272                 pr_err("query_ehea_qp failed (1)\n");
2273                 goto out;
2274         }
2275
2276         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2277         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2278                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2279                                      &dummy64, &dummy64, &dummy16, &dummy16);
2280         if (hret != H_SUCCESS) {
2281                 pr_err("modify_ehea_qp failed (1)\n");
2282                 goto out;
2283         }
2284
2285         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2286                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2287         if (hret != H_SUCCESS) {
2288                 pr_err("query_ehea_qp failed (2)\n");
2289                 goto out;
2290         }
2291
2292         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2293         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2294                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2295                                      &dummy64, &dummy64, &dummy16, &dummy16);
2296         if (hret != H_SUCCESS) {
2297                 pr_err("modify_ehea_qp failed (2)\n");
2298                 goto out;
2299         }
2300
2301         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2302                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2303         if (hret != H_SUCCESS) {
2304                 pr_err("query_ehea_qp failed (3)\n");
2305                 goto out;
2306         }
2307
2308         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2309         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2310                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2311                                      &dummy64, &dummy64, &dummy16, &dummy16);
2312         if (hret != H_SUCCESS) {
2313                 pr_err("modify_ehea_qp failed (3)\n");
2314                 goto out;
2315         }
2316
2317         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2318                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2319         if (hret != H_SUCCESS) {
2320                 pr_err("query_ehea_qp failed (4)\n");
2321                 goto out;
2322         }
2323
2324         ret = 0;
2325 out:
2326         free_page((unsigned long)cb0);
2327         return ret;
2328 }
2329
2330 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2331 {
2332         int ret, i;
2333         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2334         enum ehea_eq_type eq_type = EHEA_EQ;
2335
2336         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2337                                    EHEA_MAX_ENTRIES_EQ, 1);
2338         if (!port->qp_eq) {
2339                 ret = -EINVAL;
2340                 pr_err("ehea_create_eq failed (qp_eq)\n");
2341                 goto out_kill_eq;
2342         }
2343
2344         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2345         pr_cfg.max_entries_scq = sq_entries * 2;
2346         pr_cfg.max_entries_sq = sq_entries;
2347         pr_cfg.max_entries_rq1 = rq1_entries;
2348         pr_cfg.max_entries_rq2 = rq2_entries;
2349         pr_cfg.max_entries_rq3 = rq3_entries;
2350
2351         pr_cfg_small_rx.max_entries_rcq = 1;
2352         pr_cfg_small_rx.max_entries_scq = sq_entries;
2353         pr_cfg_small_rx.max_entries_sq = sq_entries;
2354         pr_cfg_small_rx.max_entries_rq1 = 1;
2355         pr_cfg_small_rx.max_entries_rq2 = 1;
2356         pr_cfg_small_rx.max_entries_rq3 = 1;
2357
2358         for (i = 0; i < def_qps; i++) {
2359                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2360                 if (ret)
2361                         goto out_clean_pr;
2362         }
2363         for (i = def_qps; i < def_qps; i++) {
2364                 ret = ehea_init_port_res(port, &port->port_res[i],
2365                                          &pr_cfg_small_rx, i);
2366                 if (ret)
2367                         goto out_clean_pr;
2368         }
2369
2370         return 0;
2371
2372 out_clean_pr:
2373         while (--i >= 0)
2374                 ehea_clean_portres(port, &port->port_res[i]);
2375
2376 out_kill_eq:
2377         ehea_destroy_eq(port->qp_eq);
2378         return ret;
2379 }
2380
2381 static int ehea_clean_all_portres(struct ehea_port *port)
2382 {
2383         int ret = 0;
2384         int i;
2385
2386         for (i = 0; i < port->num_def_qps; i++)
2387                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2388
2389         ret |= ehea_destroy_eq(port->qp_eq);
2390
2391         return ret;
2392 }
2393
2394 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2395 {
2396         if (adapter->active_ports)
2397                 return;
2398
2399         ehea_rem_mr(&adapter->mr);
2400 }
2401
2402 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2403 {
2404         if (adapter->active_ports)
2405                 return 0;
2406
2407         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2408 }
2409
2410 static int ehea_up(struct net_device *dev)
2411 {
2412         int ret, i;
2413         struct ehea_port *port = netdev_priv(dev);
2414
2415         if (port->state == EHEA_PORT_UP)
2416                 return 0;
2417
2418         ret = ehea_port_res_setup(port, port->num_def_qps);
2419         if (ret) {
2420                 netdev_err(dev, "port_res_failed\n");
2421                 goto out;
2422         }
2423
2424         /* Set default QP for this port */
2425         ret = ehea_configure_port(port);
2426         if (ret) {
2427                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2428                 goto out_clean_pr;
2429         }
2430
2431         ret = ehea_reg_interrupts(dev);
2432         if (ret) {
2433                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2434                 goto out_clean_pr;
2435         }
2436
2437         for (i = 0; i < port->num_def_qps; i++) {
2438                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2439                 if (ret) {
2440                         netdev_err(dev, "activate_qp failed\n");
2441                         goto out_free_irqs;
2442                 }
2443         }
2444
2445         for (i = 0; i < port->num_def_qps; i++) {
2446                 ret = ehea_fill_port_res(&port->port_res[i]);
2447                 if (ret) {
2448                         netdev_err(dev, "out_free_irqs\n");
2449                         goto out_free_irqs;
2450                 }
2451         }
2452
2453         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2454         if (ret) {
2455                 ret = -EIO;
2456                 goto out_free_irqs;
2457         }
2458
2459         port->state = EHEA_PORT_UP;
2460
2461         ret = 0;
2462         goto out;
2463
2464 out_free_irqs:
2465         ehea_free_interrupts(dev);
2466
2467 out_clean_pr:
2468         ehea_clean_all_portres(port);
2469 out:
2470         if (ret)
2471                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2472
2473         ehea_update_bcmc_registrations();
2474         ehea_update_firmware_handles();
2475
2476         return ret;
2477 }
2478
2479 static void port_napi_disable(struct ehea_port *port)
2480 {
2481         int i;
2482
2483         for (i = 0; i < port->num_def_qps; i++)
2484                 napi_disable(&port->port_res[i].napi);
2485 }
2486
2487 static void port_napi_enable(struct ehea_port *port)
2488 {
2489         int i;
2490
2491         for (i = 0; i < port->num_def_qps; i++)
2492                 napi_enable(&port->port_res[i].napi);
2493 }
2494
2495 static int ehea_open(struct net_device *dev)
2496 {
2497         int ret;
2498         struct ehea_port *port = netdev_priv(dev);
2499
2500         mutex_lock(&port->port_lock);
2501
2502         netif_info(port, ifup, dev, "enabling port\n");
2503
2504         ret = ehea_up(dev);
2505         if (!ret) {
2506                 port_napi_enable(port);
2507                 netif_tx_start_all_queues(dev);
2508         }
2509
2510         mutex_unlock(&port->port_lock);
2511         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
2512
2513         return ret;
2514 }
2515
2516 static int ehea_down(struct net_device *dev)
2517 {
2518         int ret;
2519         struct ehea_port *port = netdev_priv(dev);
2520
2521         if (port->state == EHEA_PORT_DOWN)
2522                 return 0;
2523
2524         ehea_drop_multicast_list(dev);
2525         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2526
2527         ehea_free_interrupts(dev);
2528
2529         port->state = EHEA_PORT_DOWN;
2530
2531         ehea_update_bcmc_registrations();
2532
2533         ret = ehea_clean_all_portres(port);
2534         if (ret)
2535                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2536
2537         ehea_update_firmware_handles();
2538
2539         return ret;
2540 }
2541
2542 static int ehea_stop(struct net_device *dev)
2543 {
2544         int ret;
2545         struct ehea_port *port = netdev_priv(dev);
2546
2547         netif_info(port, ifdown, dev, "disabling port\n");
2548
2549         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2550         cancel_work_sync(&port->reset_task);
2551         cancel_delayed_work_sync(&port->stats_work);
2552         mutex_lock(&port->port_lock);
2553         netif_tx_stop_all_queues(dev);
2554         port_napi_disable(port);
2555         ret = ehea_down(dev);
2556         mutex_unlock(&port->port_lock);
2557         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2558         return ret;
2559 }
2560
2561 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2562 {
2563         struct ehea_qp qp = *orig_qp;
2564         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2565         struct ehea_swqe *swqe;
2566         int wqe_index;
2567         int i;
2568
2569         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2570                 swqe = ehea_get_swqe(&qp, &wqe_index);
2571                 swqe->tx_control |= EHEA_SWQE_PURGE;
2572         }
2573 }
2574
2575 static void ehea_flush_sq(struct ehea_port *port)
2576 {
2577         int i;
2578
2579         for (i = 0; i < port->num_def_qps; i++) {
2580                 struct ehea_port_res *pr = &port->port_res[i];
2581                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2582                 int ret;
2583
2584                 ret = wait_event_timeout(port->swqe_avail_wq,
2585                          atomic_read(&pr->swqe_avail) >= swqe_max,
2586                          msecs_to_jiffies(100));
2587
2588                 if (!ret) {
2589                         pr_err("WARNING: sq not flushed completely\n");
2590                         break;
2591                 }
2592         }
2593 }
2594
2595 int ehea_stop_qps(struct net_device *dev)
2596 {
2597         struct ehea_port *port = netdev_priv(dev);
2598         struct ehea_adapter *adapter = port->adapter;
2599         struct hcp_modify_qp_cb0 *cb0;
2600         int ret = -EIO;
2601         int dret;
2602         int i;
2603         u64 hret;
2604         u64 dummy64 = 0;
2605         u16 dummy16 = 0;
2606
2607         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2608         if (!cb0) {
2609                 ret = -ENOMEM;
2610                 goto out;
2611         }
2612
2613         for (i = 0; i < (port->num_def_qps); i++) {
2614                 struct ehea_port_res *pr =  &port->port_res[i];
2615                 struct ehea_qp *qp = pr->qp;
2616
2617                 /* Purge send queue */
2618                 ehea_purge_sq(qp);
2619
2620                 /* Disable queue pair */
2621                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2622                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2623                                             cb0);
2624                 if (hret != H_SUCCESS) {
2625                         pr_err("query_ehea_qp failed (1)\n");
2626                         goto out;
2627                 }
2628
2629                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2630                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2631
2632                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2633                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2634                                                             1), cb0, &dummy64,
2635                                              &dummy64, &dummy16, &dummy16);
2636                 if (hret != H_SUCCESS) {
2637                         pr_err("modify_ehea_qp failed (1)\n");
2638                         goto out;
2639                 }
2640
2641                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2642                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2643                                             cb0);
2644                 if (hret != H_SUCCESS) {
2645                         pr_err("query_ehea_qp failed (2)\n");
2646                         goto out;
2647                 }
2648
2649                 /* deregister shared memory regions */
2650                 dret = ehea_rem_smrs(pr);
2651                 if (dret) {
2652                         pr_err("unreg shared memory region failed\n");
2653                         goto out;
2654                 }
2655         }
2656
2657         ret = 0;
2658 out:
2659         free_page((unsigned long)cb0);
2660
2661         return ret;
2662 }
2663
2664 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2665 {
2666         struct ehea_qp qp = *orig_qp;
2667         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2668         struct ehea_rwqe *rwqe;
2669         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2670         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2671         struct sk_buff *skb;
2672         u32 lkey = pr->recv_mr.lkey;
2673
2674
2675         int i;
2676         int index;
2677
2678         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2679                 rwqe = ehea_get_next_rwqe(&qp, 2);
2680                 rwqe->sg_list[0].l_key = lkey;
2681                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2682                 skb = skba_rq2[index];
2683                 if (skb)
2684                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2685         }
2686
2687         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2688                 rwqe = ehea_get_next_rwqe(&qp, 3);
2689                 rwqe->sg_list[0].l_key = lkey;
2690                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2691                 skb = skba_rq3[index];
2692                 if (skb)
2693                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2694         }
2695 }
2696
2697 int ehea_restart_qps(struct net_device *dev)
2698 {
2699         struct ehea_port *port = netdev_priv(dev);
2700         struct ehea_adapter *adapter = port->adapter;
2701         int ret = 0;
2702         int i;
2703
2704         struct hcp_modify_qp_cb0 *cb0;
2705         u64 hret;
2706         u64 dummy64 = 0;
2707         u16 dummy16 = 0;
2708
2709         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2710         if (!cb0) {
2711                 ret = -ENOMEM;
2712                 goto out;
2713         }
2714
2715         for (i = 0; i < (port->num_def_qps); i++) {
2716                 struct ehea_port_res *pr =  &port->port_res[i];
2717                 struct ehea_qp *qp = pr->qp;
2718
2719                 ret = ehea_gen_smrs(pr);
2720                 if (ret) {
2721                         netdev_err(dev, "creation of shared memory regions failed\n");
2722                         goto out;
2723                 }
2724
2725                 ehea_update_rqs(qp, pr);
2726
2727                 /* Enable queue pair */
2728                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2729                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2730                                             cb0);
2731                 if (hret != H_SUCCESS) {
2732                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2733                         goto out;
2734                 }
2735
2736                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2737                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2738
2739                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2740                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2741                                                             1), cb0, &dummy64,
2742                                              &dummy64, &dummy16, &dummy16);
2743                 if (hret != H_SUCCESS) {
2744                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2745                         goto out;
2746                 }
2747
2748                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2749                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2750                                             cb0);
2751                 if (hret != H_SUCCESS) {
2752                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2753                         goto out;
2754                 }
2755
2756                 /* refill entire queue */
2757                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2758                 ehea_refill_rq2(pr, 0);
2759                 ehea_refill_rq3(pr, 0);
2760         }
2761 out:
2762         free_page((unsigned long)cb0);
2763
2764         return ret;
2765 }
2766
2767 static void ehea_reset_port(struct work_struct *work)
2768 {
2769         int ret;
2770         struct ehea_port *port =
2771                 container_of(work, struct ehea_port, reset_task);
2772         struct net_device *dev = port->netdev;
2773
2774         mutex_lock(&dlpar_mem_lock);
2775         port->resets++;
2776         mutex_lock(&port->port_lock);
2777         netif_tx_disable(dev);
2778
2779         port_napi_disable(port);
2780
2781         ehea_down(dev);
2782
2783         ret = ehea_up(dev);
2784         if (ret)
2785                 goto out;
2786
2787         ehea_set_multicast_list(dev);
2788
2789         netif_info(port, timer, dev, "reset successful\n");
2790
2791         port_napi_enable(port);
2792
2793         netif_tx_wake_all_queues(dev);
2794 out:
2795         mutex_unlock(&port->port_lock);
2796         mutex_unlock(&dlpar_mem_lock);
2797 }
2798
2799 static void ehea_rereg_mrs(void)
2800 {
2801         int ret, i;
2802         struct ehea_adapter *adapter;
2803
2804         pr_info("LPAR memory changed - re-initializing driver\n");
2805
2806         list_for_each_entry(adapter, &adapter_list, list)
2807                 if (adapter->active_ports) {
2808                         /* Shutdown all ports */
2809                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2810                                 struct ehea_port *port = adapter->port[i];
2811                                 struct net_device *dev;
2812
2813                                 if (!port)
2814                                         continue;
2815
2816                                 dev = port->netdev;
2817
2818                                 if (dev->flags & IFF_UP) {
2819                                         mutex_lock(&port->port_lock);
2820                                         netif_tx_disable(dev);
2821                                         ehea_flush_sq(port);
2822                                         ret = ehea_stop_qps(dev);
2823                                         if (ret) {
2824                                                 mutex_unlock(&port->port_lock);
2825                                                 goto out;
2826                                         }
2827                                         port_napi_disable(port);
2828                                         mutex_unlock(&port->port_lock);
2829                                 }
2830                                 reset_sq_restart_flag(port);
2831                         }
2832
2833                         /* Unregister old memory region */
2834                         ret = ehea_rem_mr(&adapter->mr);
2835                         if (ret) {
2836                                 pr_err("unregister MR failed - driver inoperable!\n");
2837                                 goto out;
2838                         }
2839                 }
2840
2841         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2842
2843         list_for_each_entry(adapter, &adapter_list, list)
2844                 if (adapter->active_ports) {
2845                         /* Register new memory region */
2846                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2847                         if (ret) {
2848                                 pr_err("register MR failed - driver inoperable!\n");
2849                                 goto out;
2850                         }
2851
2852                         /* Restart all ports */
2853                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2854                                 struct ehea_port *port = adapter->port[i];
2855
2856                                 if (port) {
2857                                         struct net_device *dev = port->netdev;
2858
2859                                         if (dev->flags & IFF_UP) {
2860                                                 mutex_lock(&port->port_lock);
2861                                                 ret = ehea_restart_qps(dev);
2862                                                 if (!ret) {
2863                                                         check_sqs(port);
2864                                                         port_napi_enable(port);
2865                                                         netif_tx_wake_all_queues(dev);
2866                                                 } else {
2867                                                         netdev_err(dev, "Unable to restart QPS\n");
2868                                                 }
2869                                                 mutex_unlock(&port->port_lock);
2870                                         }
2871                                 }
2872                         }
2873                 }
2874         pr_info("re-initializing driver complete\n");
2875 out:
2876         return;
2877 }
2878
2879 static void ehea_tx_watchdog(struct net_device *dev)
2880 {
2881         struct ehea_port *port = netdev_priv(dev);
2882
2883         if (netif_carrier_ok(dev) &&
2884             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2885                 ehea_schedule_port_reset(port);
2886 }
2887
2888 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2889 {
2890         struct hcp_query_ehea *cb;
2891         u64 hret;
2892         int ret;
2893
2894         cb = (void *)get_zeroed_page(GFP_KERNEL);
2895         if (!cb) {
2896                 ret = -ENOMEM;
2897                 goto out;
2898         }
2899
2900         hret = ehea_h_query_ehea(adapter->handle, cb);
2901
2902         if (hret != H_SUCCESS) {
2903                 ret = -EIO;
2904                 goto out_herr;
2905         }
2906
2907         adapter->max_mc_mac = cb->max_mc_mac - 1;
2908         ret = 0;
2909
2910 out_herr:
2911         free_page((unsigned long)cb);
2912 out:
2913         return ret;
2914 }
2915
2916 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2917 {
2918         struct hcp_ehea_port_cb4 *cb4;
2919         u64 hret;
2920         int ret = 0;
2921
2922         *jumbo = 0;
2923
2924         /* (Try to) enable *jumbo frames */
2925         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2926         if (!cb4) {
2927                 pr_err("no mem for cb4\n");
2928                 ret = -ENOMEM;
2929                 goto out;
2930         } else {
2931                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2932                                               port->logical_port_id,
2933                                               H_PORT_CB4,
2934                                               H_PORT_CB4_JUMBO, cb4);
2935                 if (hret == H_SUCCESS) {
2936                         if (cb4->jumbo_frame)
2937                                 *jumbo = 1;
2938                         else {
2939                                 cb4->jumbo_frame = 1;
2940                                 hret = ehea_h_modify_ehea_port(port->adapter->
2941                                                                handle,
2942                                                                port->
2943                                                                logical_port_id,
2944                                                                H_PORT_CB4,
2945                                                                H_PORT_CB4_JUMBO,
2946                                                                cb4);
2947                                 if (hret == H_SUCCESS)
2948                                         *jumbo = 1;
2949                         }
2950                 } else
2951                         ret = -EINVAL;
2952
2953                 free_page((unsigned long)cb4);
2954         }
2955 out:
2956         return ret;
2957 }
2958
2959 static ssize_t ehea_show_port_id(struct device *dev,
2960                                  struct device_attribute *attr, char *buf)
2961 {
2962         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2963         return sprintf(buf, "%d", port->logical_port_id);
2964 }
2965
2966 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2967                    NULL);
2968
2969 static void __devinit logical_port_release(struct device *dev)
2970 {
2971         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2972         of_node_put(port->ofdev.dev.of_node);
2973 }
2974
2975 static struct device *ehea_register_port(struct ehea_port *port,
2976                                          struct device_node *dn)
2977 {
2978         int ret;
2979
2980         port->ofdev.dev.of_node = of_node_get(dn);
2981         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2982         port->ofdev.dev.bus = &ibmebus_bus_type;
2983
2984         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2985         port->ofdev.dev.release = logical_port_release;
2986
2987         ret = of_device_register(&port->ofdev);
2988         if (ret) {
2989                 pr_err("failed to register device. ret=%d\n", ret);
2990                 goto out;
2991         }
2992
2993         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2994         if (ret) {
2995                 pr_err("failed to register attributes, ret=%d\n", ret);
2996                 goto out_unreg_of_dev;
2997         }
2998
2999         return &port->ofdev.dev;
3000
3001 out_unreg_of_dev:
3002         of_device_unregister(&port->ofdev);
3003 out:
3004         return NULL;
3005 }
3006
3007 static void ehea_unregister_port(struct ehea_port *port)
3008 {
3009         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3010         of_device_unregister(&port->ofdev);
3011 }
3012
3013 static const struct net_device_ops ehea_netdev_ops = {
3014         .ndo_open               = ehea_open,
3015         .ndo_stop               = ehea_stop,
3016         .ndo_start_xmit         = ehea_start_xmit,
3017 #ifdef CONFIG_NET_POLL_CONTROLLER
3018         .ndo_poll_controller    = ehea_netpoll,
3019 #endif
3020         .ndo_get_stats          = ehea_get_stats,
3021         .ndo_set_mac_address    = ehea_set_mac_addr,
3022         .ndo_validate_addr      = eth_validate_addr,
3023         .ndo_set_rx_mode        = ehea_set_multicast_list,
3024         .ndo_change_mtu         = ehea_change_mtu,
3025         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3026         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3027         .ndo_tx_timeout         = ehea_tx_watchdog,
3028 };
3029
3030 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3031                                          u32 logical_port_id,
3032                                          struct device_node *dn)
3033 {
3034         int ret;
3035         struct net_device *dev;
3036         struct ehea_port *port;
3037         struct device *port_dev;
3038         int jumbo;
3039
3040         /* allocate memory for the port structures */
3041         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
3042
3043         if (!dev) {
3044                 pr_err("no mem for net_device\n");
3045                 ret = -ENOMEM;
3046                 goto out_err;
3047         }
3048
3049         port = netdev_priv(dev);
3050
3051         mutex_init(&port->port_lock);
3052         port->state = EHEA_PORT_DOWN;
3053         port->sig_comp_iv = sq_entries / 10;
3054
3055         port->adapter = adapter;
3056         port->netdev = dev;
3057         port->logical_port_id = logical_port_id;
3058
3059         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3060
3061         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3062         if (!port->mc_list) {
3063                 ret = -ENOMEM;
3064                 goto out_free_ethdev;
3065         }
3066
3067         INIT_LIST_HEAD(&port->mc_list->list);
3068
3069         ret = ehea_sense_port_attr(port);
3070         if (ret)
3071                 goto out_free_mc_list;
3072
3073         netif_set_real_num_rx_queues(dev, port->num_def_qps);
3074         netif_set_real_num_tx_queues(dev, port->num_def_qps);
3075
3076         port_dev = ehea_register_port(port, dn);
3077         if (!port_dev)
3078                 goto out_free_mc_list;
3079
3080         SET_NETDEV_DEV(dev, port_dev);
3081
3082         /* initialize net_device structure */
3083         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3084
3085         dev->netdev_ops = &ehea_netdev_ops;
3086         ehea_set_ethtool_ops(dev);
3087
3088         dev->hw_features = NETIF_F_SG | NETIF_F_TSO
3089                       | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3090         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3091                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3092                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3093                       | NETIF_F_RXCSUM;
3094         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3095                         NETIF_F_IP_CSUM;
3096         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3097
3098         if (use_lro)
3099                 dev->features |= NETIF_F_LRO;
3100
3101         INIT_WORK(&port->reset_task, ehea_reset_port);
3102         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3103
3104         init_waitqueue_head(&port->swqe_avail_wq);
3105         init_waitqueue_head(&port->restart_wq);
3106
3107         memset(&port->stats, 0, sizeof(struct net_device_stats));
3108         ret = register_netdev(dev);
3109         if (ret) {
3110                 pr_err("register_netdev failed. ret=%d\n", ret);
3111                 goto out_unreg_port;
3112         }
3113
3114         port->lro_max_aggr = lro_max_aggr;
3115
3116         ret = ehea_get_jumboframe_status(port, &jumbo);
3117         if (ret)
3118                 netdev_err(dev, "failed determining jumbo frame status\n");
3119
3120         netdev_info(dev, "Jumbo frames are %sabled\n",
3121                     jumbo == 1 ? "en" : "dis");
3122
3123         adapter->active_ports++;
3124
3125         return port;
3126
3127 out_unreg_port:
3128         ehea_unregister_port(port);
3129
3130 out_free_mc_list:
3131         kfree(port->mc_list);
3132
3133 out_free_ethdev:
3134         free_netdev(dev);
3135
3136 out_err:
3137         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3138                logical_port_id, ret);
3139         return NULL;
3140 }
3141
3142 static void ehea_shutdown_single_port(struct ehea_port *port)
3143 {
3144         struct ehea_adapter *adapter = port->adapter;
3145
3146         cancel_work_sync(&port->reset_task);
3147         cancel_delayed_work_sync(&port->stats_work);
3148         unregister_netdev(port->netdev);
3149         ehea_unregister_port(port);
3150         kfree(port->mc_list);
3151         free_netdev(port->netdev);
3152         adapter->active_ports--;
3153 }
3154
3155 static int ehea_setup_ports(struct ehea_adapter *adapter)
3156 {
3157         struct device_node *lhea_dn;
3158         struct device_node *eth_dn = NULL;
3159
3160         const u32 *dn_log_port_id;
3161         int i = 0;
3162
3163         lhea_dn = adapter->ofdev->dev.of_node;
3164         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3165
3166                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3167                                                  NULL);
3168                 if (!dn_log_port_id) {
3169                         pr_err("bad device node: eth_dn name=%s\n",
3170                                eth_dn->full_name);
3171                         continue;
3172                 }
3173
3174                 if (ehea_add_adapter_mr(adapter)) {
3175                         pr_err("creating MR failed\n");
3176                         of_node_put(eth_dn);
3177                         return -EIO;
3178                 }
3179
3180                 adapter->port[i] = ehea_setup_single_port(adapter,
3181                                                           *dn_log_port_id,
3182                                                           eth_dn);
3183                 if (adapter->port[i])
3184                         netdev_info(adapter->port[i]->netdev,
3185                                     "logical port id #%d\n", *dn_log_port_id);
3186                 else
3187                         ehea_remove_adapter_mr(adapter);
3188
3189                 i++;
3190         }
3191         return 0;
3192 }
3193
3194 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3195                                            u32 logical_port_id)
3196 {
3197         struct device_node *lhea_dn;
3198         struct device_node *eth_dn = NULL;
3199         const u32 *dn_log_port_id;
3200
3201         lhea_dn = adapter->ofdev->dev.of_node;
3202         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3203
3204                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3205                                                  NULL);
3206                 if (dn_log_port_id)
3207                         if (*dn_log_port_id == logical_port_id)
3208                                 return eth_dn;
3209         }
3210
3211         return NULL;
3212 }
3213
3214 static ssize_t ehea_probe_port(struct device *dev,
3215                                struct device_attribute *attr,
3216                                const char *buf, size_t count)
3217 {
3218         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3219         struct ehea_port *port;
3220         struct device_node *eth_dn = NULL;
3221         int i;
3222
3223         u32 logical_port_id;
3224
3225         sscanf(buf, "%d", &logical_port_id);
3226
3227         port = ehea_get_port(adapter, logical_port_id);
3228
3229         if (port) {
3230                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3231                             logical_port_id);
3232                 return -EINVAL;
3233         }
3234
3235         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3236
3237         if (!eth_dn) {
3238                 pr_info("no logical port with id %d found\n", logical_port_id);
3239                 return -EINVAL;
3240         }
3241
3242         if (ehea_add_adapter_mr(adapter)) {
3243                 pr_err("creating MR failed\n");
3244                 return -EIO;
3245         }
3246
3247         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3248
3249         of_node_put(eth_dn);
3250
3251         if (port) {
3252                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3253                         if (!adapter->port[i]) {
3254                                 adapter->port[i] = port;
3255                                 break;
3256                         }
3257
3258                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3259                             logical_port_id);
3260         } else {
3261                 ehea_remove_adapter_mr(adapter);
3262                 return -EIO;
3263         }
3264
3265         return (ssize_t) count;
3266 }
3267
3268 static ssize_t ehea_remove_port(struct device *dev,
3269                                 struct device_attribute *attr,
3270                                 const char *buf, size_t count)
3271 {
3272         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3273         struct ehea_port *port;
3274         int i;
3275         u32 logical_port_id;
3276
3277         sscanf(buf, "%d", &logical_port_id);
3278
3279         port = ehea_get_port(adapter, logical_port_id);
3280
3281         if (port) {
3282                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3283                             logical_port_id);
3284
3285                 ehea_shutdown_single_port(port);
3286
3287                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3288                         if (adapter->port[i] == port) {
3289                                 adapter->port[i] = NULL;
3290                                 break;
3291                         }
3292         } else {
3293                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3294                        logical_port_id);
3295                 return -EINVAL;
3296         }
3297
3298         ehea_remove_adapter_mr(adapter);
3299
3300         return (ssize_t) count;
3301 }
3302
3303 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3304 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3305
3306 int ehea_create_device_sysfs(struct platform_device *dev)
3307 {
3308         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3309         if (ret)
3310                 goto out;
3311
3312         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3313 out:
3314         return ret;
3315 }
3316
3317 void ehea_remove_device_sysfs(struct platform_device *dev)
3318 {
3319         device_remove_file(&dev->dev, &dev_attr_probe_port);
3320         device_remove_file(&dev->dev, &dev_attr_remove_port);
3321 }
3322
3323 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3324                                         const struct of_device_id *id)
3325 {
3326         struct ehea_adapter *adapter;
3327         const u64 *adapter_handle;
3328         int ret;
3329
3330         if (!dev || !dev->dev.of_node) {
3331                 pr_err("Invalid ibmebus device probed\n");
3332                 return -EINVAL;
3333         }
3334
3335         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3336         if (!adapter) {
3337                 ret = -ENOMEM;
3338                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3339                 goto out;
3340         }
3341
3342         list_add(&adapter->list, &adapter_list);
3343
3344         adapter->ofdev = dev;
3345
3346         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3347                                          NULL);
3348         if (adapter_handle)
3349                 adapter->handle = *adapter_handle;
3350
3351         if (!adapter->handle) {
3352                 dev_err(&dev->dev, "failed getting handle for adapter"
3353                         " '%s'\n", dev->dev.of_node->full_name);
3354                 ret = -ENODEV;
3355                 goto out_free_ad;
3356         }
3357
3358         adapter->pd = EHEA_PD_ID;
3359
3360         dev_set_drvdata(&dev->dev, adapter);
3361
3362
3363         /* initialize adapter and ports */
3364         /* get adapter properties */
3365         ret = ehea_sense_adapter_attr(adapter);
3366         if (ret) {
3367                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3368                 goto out_free_ad;
3369         }
3370
3371         adapter->neq = ehea_create_eq(adapter,
3372                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3373         if (!adapter->neq) {
3374                 ret = -EIO;
3375                 dev_err(&dev->dev, "NEQ creation failed\n");
3376                 goto out_free_ad;
3377         }
3378
3379         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3380                      (unsigned long)adapter);
3381
3382         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3383                                   ehea_interrupt_neq, IRQF_DISABLED,
3384                                   "ehea_neq", adapter);
3385         if (ret) {
3386                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3387                 goto out_kill_eq;
3388         }
3389
3390         ret = ehea_create_device_sysfs(dev);
3391         if (ret)
3392                 goto out_free_irq;
3393
3394         ret = ehea_setup_ports(adapter);
3395         if (ret) {
3396                 dev_err(&dev->dev, "setup_ports failed\n");
3397                 goto out_rem_dev_sysfs;
3398         }
3399
3400         ret = 0;
3401         goto out;
3402
3403 out_rem_dev_sysfs:
3404         ehea_remove_device_sysfs(dev);
3405
3406 out_free_irq:
3407         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3408
3409 out_kill_eq:
3410         ehea_destroy_eq(adapter->neq);
3411
3412 out_free_ad:
3413         list_del(&adapter->list);
3414         kfree(adapter);
3415
3416 out:
3417         ehea_update_firmware_handles();
3418
3419         return ret;
3420 }
3421
3422 static int __devexit ehea_remove(struct platform_device *dev)
3423 {
3424         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3425         int i;
3426
3427         for (i = 0; i < EHEA_MAX_PORTS; i++)
3428                 if (adapter->port[i]) {
3429                         ehea_shutdown_single_port(adapter->port[i]);
3430                         adapter->port[i] = NULL;
3431                 }
3432
3433         ehea_remove_device_sysfs(dev);
3434
3435         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3436         tasklet_kill(&adapter->neq_tasklet);
3437
3438         ehea_destroy_eq(adapter->neq);
3439         ehea_remove_adapter_mr(adapter);
3440         list_del(&adapter->list);
3441         kfree(adapter);
3442
3443         ehea_update_firmware_handles();
3444
3445         return 0;
3446 }
3447
3448 void ehea_crash_handler(void)
3449 {
3450         int i;
3451
3452         if (ehea_fw_handles.arr)
3453                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3454                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3455                                              ehea_fw_handles.arr[i].fwh,
3456                                              FORCE_FREE);
3457
3458         if (ehea_bcmc_regs.arr)
3459                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3460                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3461                                               ehea_bcmc_regs.arr[i].port_id,
3462                                               ehea_bcmc_regs.arr[i].reg_type,
3463                                               ehea_bcmc_regs.arr[i].macaddr,
3464                                               0, H_DEREG_BCMC);
3465 }
3466
3467 static int ehea_mem_notifier(struct notifier_block *nb,
3468                              unsigned long action, void *data)
3469 {
3470         int ret = NOTIFY_BAD;
3471         struct memory_notify *arg = data;
3472
3473         mutex_lock(&dlpar_mem_lock);
3474
3475         switch (action) {
3476         case MEM_CANCEL_OFFLINE:
3477                 pr_info("memory offlining canceled");
3478                 /* Readd canceled memory block */
3479         case MEM_ONLINE:
3480                 pr_info("memory is going online");
3481                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3482                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3483                         goto out_unlock;
3484                 ehea_rereg_mrs();
3485                 break;
3486         case MEM_GOING_OFFLINE:
3487                 pr_info("memory is going offline");
3488                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3489                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3490                         goto out_unlock;
3491                 ehea_rereg_mrs();
3492                 break;
3493         default:
3494                 break;
3495         }
3496
3497         ehea_update_firmware_handles();
3498         ret = NOTIFY_OK;
3499
3500 out_unlock:
3501         mutex_unlock(&dlpar_mem_lock);
3502         return ret;
3503 }
3504
3505 static struct notifier_block ehea_mem_nb = {
3506         .notifier_call = ehea_mem_notifier,
3507 };
3508
3509 static int ehea_reboot_notifier(struct notifier_block *nb,
3510                                 unsigned long action, void *unused)
3511 {
3512         if (action == SYS_RESTART) {
3513                 pr_info("Reboot: freeing all eHEA resources\n");
3514                 ibmebus_unregister_driver(&ehea_driver);
3515         }
3516         return NOTIFY_DONE;
3517 }
3518
3519 static struct notifier_block ehea_reboot_nb = {
3520         .notifier_call = ehea_reboot_notifier,
3521 };
3522
3523 static int check_module_parm(void)
3524 {
3525         int ret = 0;
3526
3527         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3528             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3529                 pr_info("Bad parameter: rq1_entries\n");
3530                 ret = -EINVAL;
3531         }
3532         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3533             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3534                 pr_info("Bad parameter: rq2_entries\n");
3535                 ret = -EINVAL;
3536         }
3537         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3538             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3539                 pr_info("Bad parameter: rq3_entries\n");
3540                 ret = -EINVAL;
3541         }
3542         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3543             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3544                 pr_info("Bad parameter: sq_entries\n");
3545                 ret = -EINVAL;
3546         }
3547
3548         return ret;
3549 }
3550
3551 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3552                                       char *buf)
3553 {
3554         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3555 }
3556
3557 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3558                    ehea_show_capabilities, NULL);
3559
3560 int __init ehea_module_init(void)
3561 {
3562         int ret;
3563
3564         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3565
3566         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3567         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3568
3569         mutex_init(&ehea_fw_handles.lock);
3570         spin_lock_init(&ehea_bcmc_regs.lock);
3571
3572         ret = check_module_parm();
3573         if (ret)
3574                 goto out;
3575
3576         ret = ehea_create_busmap();
3577         if (ret)
3578                 goto out;
3579
3580         ret = register_reboot_notifier(&ehea_reboot_nb);
3581         if (ret)
3582                 pr_info("failed registering reboot notifier\n");
3583
3584         ret = register_memory_notifier(&ehea_mem_nb);
3585         if (ret)
3586                 pr_info("failed registering memory remove notifier\n");
3587
3588         ret = crash_shutdown_register(ehea_crash_handler);
3589         if (ret)
3590                 pr_info("failed registering crash handler\n");
3591
3592         ret = ibmebus_register_driver(&ehea_driver);
3593         if (ret) {
3594                 pr_err("failed registering eHEA device driver on ebus\n");
3595                 goto out2;
3596         }
3597
3598         ret = driver_create_file(&ehea_driver.driver,
3599                                  &driver_attr_capabilities);
3600         if (ret) {
3601                 pr_err("failed to register capabilities attribute, ret=%d\n",
3602                        ret);
3603                 goto out3;
3604         }
3605
3606         return ret;
3607
3608 out3:
3609         ibmebus_unregister_driver(&ehea_driver);
3610 out2:
3611         unregister_memory_notifier(&ehea_mem_nb);
3612         unregister_reboot_notifier(&ehea_reboot_nb);
3613         crash_shutdown_unregister(ehea_crash_handler);
3614 out:
3615         return ret;
3616 }
3617
3618 static void __exit ehea_module_exit(void)
3619 {
3620         int ret;
3621
3622         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3623         ibmebus_unregister_driver(&ehea_driver);
3624         unregister_reboot_notifier(&ehea_reboot_nb);
3625         ret = crash_shutdown_unregister(ehea_crash_handler);
3626         if (ret)
3627                 pr_info("failed unregistering crash handler\n");
3628         unregister_memory_notifier(&ehea_mem_nb);
3629         kfree(ehea_fw_handles.arr);
3630         kfree(ehea_bcmc_regs.arr);
3631         ehea_destroy_busmap();
3632 }
3633
3634 module_init(ehea_module_init);
3635 module_exit(ehea_module_exit);