git.oblomov.eu Git - linux-2.6/blob - drivers/net/ehea/ehea_main.c

   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include <linux/in.h>
  30 #include <linux/ip.h>
  31 #include <linux/tcp.h>
  32 #include <linux/udp.h>
  33 #include <linux/if.h>
  34 #include <linux/list.h>
  35 #include <linux/if_ether.h>
  36 #include <linux/notifier.h>
  37 #include <linux/reboot.h>
  38 #include <linux/memory.h>
  39 #include <asm/kexec.h>
  40 #include <linux/mutex.h>
  41
  42 #include <net/ip.h>
  43
  44 #include "ehea.h"
  45 #include "ehea_qmr.h"
  46 #include "ehea_phyp.h"
  47
  48
  49 MODULE_LICENSE("GPL");
  50 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  51 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  52 MODULE_VERSION(DRV_VERSION);
  53
  54
  55 static int msg_level = -1;
  56 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  57 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  58 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  59 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  60 static int use_mcs;
  61 static int use_lro;
  62 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  63 static int num_tx_qps = EHEA_NUM_TX_QP;
  64 static int prop_carrier_state;
  65
  66 module_param(msg_level, int, 0);
  67 module_param(rq1_entries, int, 0);
  68 module_param(rq2_entries, int, 0);
  69 module_param(rq3_entries, int, 0);
  70 module_param(sq_entries, int, 0);
  71 module_param(prop_carrier_state, int, 0);
  72 module_param(use_mcs, int, 0);
  73 module_param(use_lro, int, 0);
  74 module_param(lro_max_aggr, int, 0);
  75 module_param(num_tx_qps, int, 0);
  76
  77 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
  78 MODULE_PARM_DESC(msg_level, "msg_level");
  79 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  80                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  81 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  82                  "[2^x - 1], x = [6..14]. Default = "
  83                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  84 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  85                  "[2^x - 1], x = [6..14]. Default = "
  86                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  87 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  88                  "[2^x - 1], x = [6..14]. Default = "
  89                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  90 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  91                  "[2^x - 1], x = [6..14]. Default = "
  92                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  93 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
  94
  95 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
  96                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
  97 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
  98                  "Default = 0");
  99
 100 static int port_name_cnt;
 101 static LIST_HEAD(adapter_list);
 102 u64 ehea_driver_flags;
 103 struct work_struct ehea_rereg_mr_task;
 104 static DEFINE_MUTEX(dlpar_mem_lock);
 105 struct ehea_fw_handle_array ehea_fw_handles;
 106 struct ehea_bcmc_reg_array ehea_bcmc_regs;
 107
 108
 109 static int __devinit ehea_probe_adapter(struct of_device *dev,
 110                                         const struct of_device_id *id);
 111
 112 static int __devexit ehea_remove(struct of_device *dev);
 113
 114 static struct of_device_id ehea_device_table[] = {
 115         {
 116                 .name = "lhea",
 117                 .compatible = "IBM,lhea",
 118         },
 119         {},
 120 };
 121 MODULE_DEVICE_TABLE(of, ehea_device_table);
 122
 123 static struct of_platform_driver ehea_driver = {
 124         .name = "ehea",
 125         .match_table = ehea_device_table,
 126         .probe = ehea_probe_adapter,
 127         .remove = ehea_remove,
 128 };
 129
 130 void ehea_dump(void *adr, int len, char *msg)
 131 {
 132         int x;
 133         unsigned char *deb = adr;
 134         for (x = 0; x < len; x += 16) {
 135                 printk(DRV_NAME " %s adr=%p ofs=%04x %016lx %016lx\n", msg,
 136                           deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 137                 deb += 16;
 138         }
 139 }
 140
 141 void ehea_schedule_port_reset(struct ehea_port *port)
 142 {
 143         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 144                 schedule_work(&port->reset_task);
 145 }
 146
 147 static void ehea_update_firmware_handles(void)
 148 {
 149         struct ehea_fw_handle_entry *arr = NULL;
 150         struct ehea_adapter *adapter;
 151         int num_adapters = 0;
 152         int num_ports = 0;
 153         int num_portres = 0;
 154         int i = 0;
 155         int num_fw_handles, k, l;
 156
 157         /* Determine number of handles */
 158         list_for_each_entry(adapter, &adapter_list, list) {
 159                 num_adapters++;
 160
 161                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 162                         struct ehea_port *port = adapter->port[k];
 163
 164                         if (!port || (port->state != EHEA_PORT_UP))
 165                                 continue;
 166
 167                         num_ports++;
 168                         num_portres += port->num_def_qps + port->num_add_tx_qps;
 169                 }
 170         }
 171
 172         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 173                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 174                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 175
 176         if (num_fw_handles) {
 177                 arr = kzalloc(num_fw_handles * sizeof(*arr), GFP_KERNEL);
 178                 if (!arr)
 179                         return;  /* Keep the existing array */
 180         } else
 181                 goto out_update;
 182
 183         list_for_each_entry(adapter, &adapter_list, list) {
 184                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 185                         struct ehea_port *port = adapter->port[k];
 186
 187                         if (!port || (port->state != EHEA_PORT_UP))
 188                                 continue;
 189
 190                         for (l = 0;
 191                              l < port->num_def_qps + port->num_add_tx_qps;
 192                              l++) {
 193                                 struct ehea_port_res *pr = &port->port_res[l];
 194
 195                                 arr[i].adh = adapter->handle;
 196                                 arr[i++].fwh = pr->qp->fw_handle;
 197                                 arr[i].adh = adapter->handle;
 198                                 arr[i++].fwh = pr->send_cq->fw_handle;
 199                                 arr[i].adh = adapter->handle;
 200                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 201                                 arr[i].adh = adapter->handle;
 202                                 arr[i++].fwh = pr->eq->fw_handle;
 203                                 arr[i].adh = adapter->handle;
 204                                 arr[i++].fwh = pr->send_mr.handle;
 205                                 arr[i].adh = adapter->handle;
 206                                 arr[i++].fwh = pr->recv_mr.handle;
 207                         }
 208                         arr[i].adh = adapter->handle;
 209                         arr[i++].fwh = port->qp_eq->fw_handle;
 210                 }
 211
 212                 arr[i].adh = adapter->handle;
 213                 arr[i++].fwh = adapter->neq->fw_handle;
 214
 215                 if (adapter->mr.handle) {
 216                         arr[i].adh = adapter->handle;
 217                         arr[i++].fwh = adapter->mr.handle;
 218                 }
 219         }
 220
 221 out_update:
 222         kfree(ehea_fw_handles.arr);
 223         ehea_fw_handles.arr = arr;
 224         ehea_fw_handles.num_entries = i;
 225 }
 226
 227 static void ehea_update_bcmc_registrations(void)
 228 {
 229         struct ehea_bcmc_reg_entry *arr = NULL;
 230         struct ehea_adapter *adapter;
 231         struct ehea_mc_list *mc_entry;
 232         int num_registrations = 0;
 233         int i = 0;
 234         int k;
 235
 236         /* Determine number of registrations */
 237         list_for_each_entry(adapter, &adapter_list, list)
 238                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 239                         struct ehea_port *port = adapter->port[k];
 240
 241                         if (!port || (port->state != EHEA_PORT_UP))
 242                                 continue;
 243
 244                         num_registrations += 2; /* Broadcast registrations */
 245
 246                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 247                                 num_registrations += 2;
 248                 }
 249
 250         if (num_registrations) {
 251                 arr = kzalloc(num_registrations * sizeof(*arr), GFP_ATOMIC);
 252                 if (!arr)
 253                         return;  /* Keep the existing array */
 254         } else
 255                 goto out_update;
 256
 257         list_for_each_entry(adapter, &adapter_list, list) {
 258                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 259                         struct ehea_port *port = adapter->port[k];
 260
 261                         if (!port || (port->state != EHEA_PORT_UP))
 262                                 continue;
 263
 264                         arr[i].adh = adapter->handle;
 265                         arr[i].port_id = port->logical_port_id;
 266                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 267                                           EHEA_BCMC_UNTAGGED;
 268                         arr[i++].macaddr = port->mac_addr;
 269
 270                         arr[i].adh = adapter->handle;
 271                         arr[i].port_id = port->logical_port_id;
 272                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 273                                           EHEA_BCMC_VLANID_ALL;
 274                         arr[i++].macaddr = port->mac_addr;
 275
 276                         list_for_each_entry(mc_entry,
 277                                             &port->mc_list->list, list) {
 278                                 arr[i].adh = adapter->handle;
 279                                 arr[i].port_id = port->logical_port_id;
 280                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 281                                                   EHEA_BCMC_MULTICAST |
 282                                                   EHEA_BCMC_UNTAGGED;
 283                                 arr[i++].macaddr = mc_entry->macaddr;
 284
 285                                 arr[i].adh = adapter->handle;
 286                                 arr[i].port_id = port->logical_port_id;
 287                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 288                                                   EHEA_BCMC_MULTICAST |
 289                                                   EHEA_BCMC_VLANID_ALL;
 290                                 arr[i++].macaddr = mc_entry->macaddr;
 291                         }
 292                 }
 293         }
 294
 295 out_update:
 296         kfree(ehea_bcmc_regs.arr);
 297         ehea_bcmc_regs.arr = arr;
 298         ehea_bcmc_regs.num_entries = i;
 299 }
 300
 301 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 302 {
 303         struct ehea_port *port = netdev_priv(dev);
 304         struct net_device_stats *stats = &port->stats;
 305         struct hcp_ehea_port_cb2 *cb2;
 306         u64 hret, rx_packets, tx_packets;
 307         int i;
 308
 309         memset(stats, 0, sizeof(*stats));
 310
 311         cb2 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
 312         if (!cb2) {
 313                 ehea_error("no mem for cb2");
 314                 goto out;
 315         }
 316
 317         hret = ehea_h_query_ehea_port(port->adapter->handle,
 318                                       port->logical_port_id,
 319                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 320         if (hret != H_SUCCESS) {
 321                 ehea_error("query_ehea_port failed");
 322                 goto out_herr;
 323         }
 324
 325         if (netif_msg_hw(port))
 326                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 327
 328         rx_packets = 0;
 329         for (i = 0; i < port->num_def_qps; i++)
 330                 rx_packets += port->port_res[i].rx_packets;
 331
 332         tx_packets = 0;
 333         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
 334                 tx_packets += port->port_res[i].tx_packets;
 335
 336         stats->tx_packets = tx_packets;
 337         stats->multicast = cb2->rxmcp;
 338         stats->rx_errors = cb2->rxuerr;
 339         stats->rx_bytes = cb2->rxo;
 340         stats->tx_bytes = cb2->txo;
 341         stats->rx_packets = rx_packets;
 342
 343 out_herr:
 344         kfree(cb2);
 345 out:
 346         return stats;
 347 }
 348
 349 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 350 {
 351         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 352         struct net_device *dev = pr->port->netdev;
 353         int max_index_mask = pr->rq1_skba.len - 1;
 354         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 355         int adder = 0;
 356         int i;
 357
 358         pr->rq1_skba.os_skbs = 0;
 359
 360         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 361                 if (nr_of_wqes > 0)
 362                         pr->rq1_skba.index = index;
 363                 pr->rq1_skba.os_skbs = fill_wqes;
 364                 return;
 365         }
 366
 367         for (i = 0; i < fill_wqes; i++) {
 368                 if (!skb_arr_rq1[index]) {
 369                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 370                                                               EHEA_L_PKT_SIZE);
 371                         if (!skb_arr_rq1[index]) {
 372                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 373                                 ehea_error("%s: no mem for skb/%d wqes filled",
 374                                            dev->name, i);
 375                                 break;
 376                         }
 377                 }
 378                 index--;
 379                 index &= max_index_mask;
 380                 adder++;
 381         }
 382
 383         if (adder == 0)
 384                 return;
 385
 386         /* Ring doorbell */
 387         ehea_update_rq1a(pr->qp, adder);
 388 }
 389
 390 static int ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 391 {
 392         int ret = 0;
 393         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 394         struct net_device *dev = pr->port->netdev;
 395         int i;
 396
 397         for (i = 0; i < pr->rq1_skba.len; i++) {
 398                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 399                 if (!skb_arr_rq1[i]) {
 400                         ehea_error("%s: no mem for skb/%d wqes filled",
 401                                    dev->name, i);
 402                         ret = -ENOMEM;
 403                         goto out;
 404                 }
 405         }
 406         /* Ring doorbell */
 407         ehea_update_rq1a(pr->qp, nr_rq1a);
 408 out:
 409         return ret;
 410 }
 411
 412 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 413                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 414                               int num_wqes, int wqe_type, int packet_size)
 415 {
 416         struct net_device *dev = pr->port->netdev;
 417         struct ehea_qp *qp = pr->qp;
 418         struct sk_buff **skb_arr = q_skba->arr;
 419         struct ehea_rwqe *rwqe;
 420         int i, index, max_index_mask, fill_wqes;
 421         int adder = 0;
 422         int ret = 0;
 423
 424         fill_wqes = q_skba->os_skbs + num_wqes;
 425         q_skba->os_skbs = 0;
 426
 427         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 428                 q_skba->os_skbs = fill_wqes;
 429                 return ret;
 430         }
 431
 432         index = q_skba->index;
 433         max_index_mask = q_skba->len - 1;
 434         for (i = 0; i < fill_wqes; i++) {
 435                 u64 tmp_addr;
 436                 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
 437                 if (!skb) {
 438                         ehea_error("%s: no mem for skb/%d wqes filled",
 439                                    pr->port->netdev->name, i);
 440                         q_skba->os_skbs = fill_wqes - i;
 441                         ret = -ENOMEM;
 442                         break;
 443                 }
 444                 skb_reserve(skb, NET_IP_ALIGN);
 445
 446                 skb_arr[index] = skb;
 447                 tmp_addr = ehea_map_vaddr(skb->data);
 448                 if (tmp_addr == -1) {
 449                         dev_kfree_skb(skb);
 450                         q_skba->os_skbs = fill_wqes - i;
 451                         ret = 0;
 452                         break;
 453                 }
 454
 455                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 456                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 457                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 458                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 459                 rwqe->sg_list[0].vaddr = tmp_addr;
 460                 rwqe->sg_list[0].len = packet_size;
 461                 rwqe->data_segments = 1;
 462
 463                 index++;
 464                 index &= max_index_mask;
 465                 adder++;
 466         }
 467
 468         q_skba->index = index;
 469         if (adder == 0)
 470                 goto out;
 471
 472         /* Ring doorbell */
 473         iosync();
 474         if (rq_nr == 2)
 475                 ehea_update_rq2a(pr->qp, adder);
 476         else
 477                 ehea_update_rq3a(pr->qp, adder);
 478 out:
 479         return ret;
 480 }
 481
 482
 483 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 484 {
 485         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 486                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 487                                   EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
 488 }
 489
 490
 491 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 492 {
 493         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 494                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 495                                   EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
 496 }
 497
 498 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 499 {
 500         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 501         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 502                 return 0;
 503         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 504             (cqe->header_length == 0))
 505                 return 0;
 506         return -EINVAL;
 507 }
 508
 509 static inline void ehea_fill_skb(struct net_device *dev,
 510                                  struct sk_buff *skb, struct ehea_cqe *cqe)
 511 {
 512         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 513
 514         skb_put(skb, length);
 515         skb->ip_summed = CHECKSUM_UNNECESSARY;
 516         skb->protocol = eth_type_trans(skb, dev);
 517 }
 518
 519 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 520                                                int arr_len,
 521                                                struct ehea_cqe *cqe)
 522 {
 523         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 524         struct sk_buff *skb;
 525         void *pref;
 526         int x;
 527
 528         x = skb_index + 1;
 529         x &= (arr_len - 1);
 530
 531         pref = skb_array[x];
 532         prefetchw(pref);
 533         prefetchw(pref + EHEA_CACHE_LINE);
 534
 535         pref = (skb_array[x]->data);
 536         prefetch(pref);
 537         prefetch(pref + EHEA_CACHE_LINE);
 538         prefetch(pref + EHEA_CACHE_LINE * 2);
 539         prefetch(pref + EHEA_CACHE_LINE * 3);
 540         skb = skb_array[skb_index];
 541         skb_array[skb_index] = NULL;
 542         return skb;
 543 }
 544
 545 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 546                                                   int arr_len, int wqe_index)
 547 {
 548         struct sk_buff *skb;
 549         void *pref;
 550         int x;
 551
 552         x = wqe_index + 1;
 553         x &= (arr_len - 1);
 554
 555         pref = skb_array[x];
 556         prefetchw(pref);
 557         prefetchw(pref + EHEA_CACHE_LINE);
 558
 559         pref = (skb_array[x]->data);
 560         prefetchw(pref);
 561         prefetchw(pref + EHEA_CACHE_LINE);
 562
 563         skb = skb_array[wqe_index];
 564         skb_array[wqe_index] = NULL;
 565         return skb;
 566 }
 567
 568 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 569                                  struct ehea_cqe *cqe, int *processed_rq2,
 570                                  int *processed_rq3)
 571 {
 572         struct sk_buff *skb;
 573
 574         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 575                 pr->p_stats.err_tcp_cksum++;
 576         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 577                 pr->p_stats.err_ip_cksum++;
 578         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 579                 pr->p_stats.err_frame_crc++;
 580
 581         if (rq == 2) {
 582                 *processed_rq2 += 1;
 583                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 584                 dev_kfree_skb(skb);
 585         } else if (rq == 3) {
 586                 *processed_rq3 += 1;
 587                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 588                 dev_kfree_skb(skb);
 589         }
 590
 591         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 592                 if (netif_msg_rx_err(pr->port)) {
 593                         ehea_error("Critical receive error for QP %d. "
 594                                    "Resetting port.", pr->qp->init_attr.qp_nr);
 595                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 596                 }
 597                 ehea_schedule_port_reset(pr->port);
 598                 return 1;
 599         }
 600
 601         return 0;
 602 }
 603
 604 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 605                        void **tcph, u64 *hdr_flags, void *priv)
 606 {
 607         struct ehea_cqe *cqe = priv;
 608         unsigned int ip_len;
 609         struct iphdr *iph;
 610
 611         /* non tcp/udp packets */
 612         if (!cqe->header_length)
 613                 return -1;
 614
 615         /* non tcp packet */
 616         skb_reset_network_header(skb);
 617         iph = ip_hdr(skb);
 618         if (iph->protocol != IPPROTO_TCP)
 619                 return -1;
 620
 621         ip_len = ip_hdrlen(skb);
 622         skb_set_transport_header(skb, ip_len);
 623         *tcph = tcp_hdr(skb);
 624
 625         /* check if ip header and tcp header are complete */
 626         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 627                 return -1;
 628
 629         *hdr_flags = LRO_IPV4 | LRO_TCP;
 630         *iphdr = iph;
 631
 632         return 0;
 633 }
 634
 635 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 636                           struct sk_buff *skb)
 637 {
 638         int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 639                 && pr->port->vgrp;
 640
 641         if (use_lro) {
 642                 if (vlan_extracted)
 643                         lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
 644                                                      pr->port->vgrp,
 645                                                      cqe->vlan_tag,
 646                                                      cqe);
 647                 else
 648                         lro_receive_skb(&pr->lro_mgr, skb, cqe);
 649         } else {
 650                 if (vlan_extracted)
 651                         vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
 652                                                  cqe->vlan_tag);
 653                 else
 654                         netif_receive_skb(skb);
 655         }
 656 }
 657
 658 static int ehea_proc_rwqes(struct net_device *dev,
 659                            struct ehea_port_res *pr,
 660                            int budget)
 661 {
 662         struct ehea_port *port = pr->port;
 663         struct ehea_qp *qp = pr->qp;
 664         struct ehea_cqe *cqe;
 665         struct sk_buff *skb;
 666         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 667         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 668         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 669         int skb_arr_rq1_len = pr->rq1_skba.len;
 670         int skb_arr_rq2_len = pr->rq2_skba.len;
 671         int skb_arr_rq3_len = pr->rq3_skba.len;
 672         int processed, processed_rq1, processed_rq2, processed_rq3;
 673         int wqe_index, last_wqe_index, rq, port_reset;
 674
 675         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 676         last_wqe_index = 0;
 677
 678         cqe = ehea_poll_rq1(qp, &wqe_index);
 679         while ((processed < budget) && cqe) {
 680                 ehea_inc_rq1(qp);
 681                 processed_rq1++;
 682                 processed++;
 683                 if (netif_msg_rx_status(port))
 684                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 685
 686                 last_wqe_index = wqe_index;
 687                 rmb();
 688                 if (!ehea_check_cqe(cqe, &rq)) {
 689                         if (rq == 1) {
 690                                 /* LL RQ1 */
 691                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 692                                                           skb_arr_rq1_len,
 693                                                           wqe_index);
 694                                 if (unlikely(!skb)) {
 695                                         if (netif_msg_rx_err(port))
 696                                                 ehea_error("LL rq1: skb=NULL");
 697
 698                                         skb = netdev_alloc_skb(dev,
 699                                                                EHEA_L_PKT_SIZE);
 700                                         if (!skb)
 701                                                 break;
 702                                 }
 703                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 704                                                  cqe->num_bytes_transfered - 4);
 705                                 ehea_fill_skb(dev, skb, cqe);
 706                         } else if (rq == 2) {
 707                                 /* RQ2 */
 708                                 skb = get_skb_by_index(skb_arr_rq2,
 709                                                        skb_arr_rq2_len, cqe);
 710                                 if (unlikely(!skb)) {
 711                                         if (netif_msg_rx_err(port))
 712                                                 ehea_error("rq2: skb=NULL");
 713                                         break;
 714                                 }
 715                                 ehea_fill_skb(dev, skb, cqe);
 716                                 processed_rq2++;
 717                         } else {
 718                                 /* RQ3 */
 719                                 skb = get_skb_by_index(skb_arr_rq3,
 720                                                        skb_arr_rq3_len, cqe);
 721                                 if (unlikely(!skb)) {
 722                                         if (netif_msg_rx_err(port))
 723                                                 ehea_error("rq3: skb=NULL");
 724                                         break;
 725                                 }
 726                                 ehea_fill_skb(dev, skb, cqe);
 727                                 processed_rq3++;
 728                         }
 729
 730                         ehea_proc_skb(pr, cqe, skb);
 731                         dev->last_rx = jiffies;
 732                 } else {
 733                         pr->p_stats.poll_receive_errors++;
 734                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 735                                                            &processed_rq2,
 736                                                            &processed_rq3);
 737                         if (port_reset)
 738                                 break;
 739                 }
 740                 cqe = ehea_poll_rq1(qp, &wqe_index);
 741         }
 742         if (use_lro)
 743                 lro_flush_all(&pr->lro_mgr);
 744
 745         pr->rx_packets += processed;
 746
 747         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 748         ehea_refill_rq2(pr, processed_rq2);
 749         ehea_refill_rq3(pr, processed_rq3);
 750
 751         return processed;
 752 }
 753
 754 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 755 {
 756         struct sk_buff *skb;
 757         struct ehea_cq *send_cq = pr->send_cq;
 758         struct ehea_cqe *cqe;
 759         int quota = my_quota;
 760         int cqe_counter = 0;
 761         int swqe_av = 0;
 762         int index;
 763         unsigned long flags;
 764
 765         cqe = ehea_poll_cq(send_cq);
 766         while (cqe && (quota > 0)) {
 767                 ehea_inc_cq(send_cq);
 768
 769                 cqe_counter++;
 770                 rmb();
 771                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 772                         ehea_error("Send Completion Error: Resetting port");
 773                         if (netif_msg_tx_err(pr->port))
 774                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 775                         ehea_schedule_port_reset(pr->port);
 776                         break;
 777                 }
 778
 779                 if (netif_msg_tx_done(pr->port))
 780                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 781
 782                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 783                            == EHEA_SWQE2_TYPE)) {
 784
 785                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 786                         skb = pr->sq_skba.arr[index];
 787                         dev_kfree_skb(skb);
 788                         pr->sq_skba.arr[index] = NULL;
 789                 }
 790
 791                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 792                 quota--;
 793
 794                 cqe = ehea_poll_cq(send_cq);
 795         };
 796
 797         ehea_update_feca(send_cq, cqe_counter);
 798         atomic_add(swqe_av, &pr->swqe_avail);
 799
 800         spin_lock_irqsave(&pr->netif_queue, flags);
 801
 802         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 803                                   >= pr->swqe_refill_th)) {
 804                 netif_wake_queue(pr->port->netdev);
 805                 pr->queue_stopped = 0;
 806         }
 807         spin_unlock_irqrestore(&pr->netif_queue, flags);
 808
 809         return cqe;
 810 }
 811
 812 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 813 #define EHEA_POLL_MAX_CQES 65535
 814
 815 static int ehea_poll(struct napi_struct *napi, int budget)
 816 {
 817         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 818                                                 napi);
 819         struct net_device *dev = pr->port->netdev;
 820         struct ehea_cqe *cqe;
 821         struct ehea_cqe *cqe_skb = NULL;
 822         int force_irq, wqe_index;
 823         int rx = 0;
 824
 825         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 826         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 827
 828         if (!force_irq)
 829                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 830
 831         while ((rx != budget) || force_irq) {
 832                 pr->poll_counter = 0;
 833                 force_irq = 0;
 834                 netif_rx_complete(dev, napi);
 835                 ehea_reset_cq_ep(pr->recv_cq);
 836                 ehea_reset_cq_ep(pr->send_cq);
 837                 ehea_reset_cq_n1(pr->recv_cq);
 838                 ehea_reset_cq_n1(pr->send_cq);
 839                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 840                 cqe_skb = ehea_poll_cq(pr->send_cq);
 841
 842                 if (!cqe && !cqe_skb)
 843                         return rx;
 844
 845                 if (!netif_rx_reschedule(dev, napi))
 846                         return rx;
 847
 848                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 849                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 850         }
 851
 852         pr->poll_counter++;
 853         return rx;
 854 }
 855
 856 #ifdef CONFIG_NET_POLL_CONTROLLER
 857 static void ehea_netpoll(struct net_device *dev)
 858 {
 859         struct ehea_port *port = netdev_priv(dev);
 860         int i;
 861
 862         for (i = 0; i < port->num_def_qps; i++)
 863                 netif_rx_schedule(dev, &port->port_res[i].napi);
 864 }
 865 #endif
 866
 867 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 868 {
 869         struct ehea_port_res *pr = param;
 870
 871         netif_rx_schedule(pr->port->netdev, &pr->napi);
 872
 873         return IRQ_HANDLED;
 874 }
 875
 876 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 877 {
 878         struct ehea_port *port = param;
 879         struct ehea_eqe *eqe;
 880         struct ehea_qp *qp;
 881         u32 qp_token;
 882
 883         eqe = ehea_poll_eq(port->qp_eq);
 884
 885         while (eqe) {
 886                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 887                 ehea_error("QP aff_err: entry=0x%lx, token=0x%x",
 888                            eqe->entry, qp_token);
 889
 890                 qp = port->port_res[qp_token].qp;
 891                 ehea_error_data(port->adapter, qp->fw_handle);
 892                 eqe = ehea_poll_eq(port->qp_eq);
 893         }
 894
 895         ehea_schedule_port_reset(port);
 896
 897         return IRQ_HANDLED;
 898 }
 899
 900 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 901                                        int logical_port)
 902 {
 903         int i;
 904
 905         for (i = 0; i < EHEA_MAX_PORTS; i++)
 906                 if (adapter->port[i])
 907                         if (adapter->port[i]->logical_port_id == logical_port)
 908                                 return adapter->port[i];
 909         return NULL;
 910 }
 911
 912 int ehea_sense_port_attr(struct ehea_port *port)
 913 {
 914         int ret;
 915         u64 hret;
 916         struct hcp_ehea_port_cb0 *cb0;
 917
 918         /* may be called via ehea_neq_tasklet() */
 919         cb0 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
 920         if (!cb0) {
 921                 ehea_error("no mem for cb0");
 922                 ret = -ENOMEM;
 923                 goto out;
 924         }
 925
 926         hret = ehea_h_query_ehea_port(port->adapter->handle,
 927                                       port->logical_port_id, H_PORT_CB0,
 928                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 929                                       cb0);
 930         if (hret != H_SUCCESS) {
 931                 ret = -EIO;
 932                 goto out_free;
 933         }
 934
 935         /* MAC address */
 936         port->mac_addr = cb0->port_mac_addr << 16;
 937
 938         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
 939                 ret = -EADDRNOTAVAIL;
 940                 goto out_free;
 941         }
 942
 943         /* Port speed */
 944         switch (cb0->port_speed) {
 945         case H_SPEED_10M_H:
 946                 port->port_speed = EHEA_SPEED_10M;
 947                 port->full_duplex = 0;
 948                 break;
 949         case H_SPEED_10M_F:
 950                 port->port_speed = EHEA_SPEED_10M;
 951                 port->full_duplex = 1;
 952                 break;
 953         case H_SPEED_100M_H:
 954                 port->port_speed = EHEA_SPEED_100M;
 955                 port->full_duplex = 0;
 956                 break;
 957         case H_SPEED_100M_F:
 958                 port->port_speed = EHEA_SPEED_100M;
 959                 port->full_duplex = 1;
 960                 break;
 961         case H_SPEED_1G_F:
 962                 port->port_speed = EHEA_SPEED_1G;
 963                 port->full_duplex = 1;
 964                 break;
 965         case H_SPEED_10G_F:
 966                 port->port_speed = EHEA_SPEED_10G;
 967                 port->full_duplex = 1;
 968                 break;
 969         default:
 970                 port->port_speed = 0;
 971                 port->full_duplex = 0;
 972                 break;
 973         }
 974
 975         port->autoneg = 1;
 976         port->num_mcs = cb0->num_default_qps;
 977
 978         /* Number of default QPs */
 979         if (use_mcs)
 980                 port->num_def_qps = cb0->num_default_qps;
 981         else
 982                 port->num_def_qps = 1;
 983
 984         if (!port->num_def_qps) {
 985                 ret = -EINVAL;
 986                 goto out_free;
 987         }
 988
 989         port->num_tx_qps = num_tx_qps;
 990
 991         if (port->num_def_qps >= port->num_tx_qps)
 992                 port->num_add_tx_qps = 0;
 993         else
 994                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
 995
 996         ret = 0;
 997 out_free:
 998         if (ret || netif_msg_probe(port))
 999                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1000         kfree(cb0);
1001 out:
1002         return ret;
1003 }
1004
1005 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1006 {
1007         struct hcp_ehea_port_cb4 *cb4;
1008         u64 hret;
1009         int ret = 0;
1010
1011         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1012         if (!cb4) {
1013                 ehea_error("no mem for cb4");
1014                 ret = -ENOMEM;
1015                 goto out;
1016         }
1017
1018         cb4->port_speed = port_speed;
1019
1020         netif_carrier_off(port->netdev);
1021
1022         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1023                                        port->logical_port_id,
1024                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1025         if (hret == H_SUCCESS) {
1026                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1027
1028                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1029                                               port->logical_port_id,
1030                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1031                                               cb4);
1032                 if (hret == H_SUCCESS) {
1033                         switch (cb4->port_speed) {
1034                         case H_SPEED_10M_H:
1035                                 port->port_speed = EHEA_SPEED_10M;
1036                                 port->full_duplex = 0;
1037                                 break;
1038                         case H_SPEED_10M_F:
1039                                 port->port_speed = EHEA_SPEED_10M;
1040                                 port->full_duplex = 1;
1041                                 break;
1042                         case H_SPEED_100M_H:
1043                                 port->port_speed = EHEA_SPEED_100M;
1044                                 port->full_duplex = 0;
1045                                 break;
1046                         case H_SPEED_100M_F:
1047                                 port->port_speed = EHEA_SPEED_100M;
1048                                 port->full_duplex = 1;
1049                                 break;
1050                         case H_SPEED_1G_F:
1051                                 port->port_speed = EHEA_SPEED_1G;
1052                                 port->full_duplex = 1;
1053                                 break;
1054                         case H_SPEED_10G_F:
1055                                 port->port_speed = EHEA_SPEED_10G;
1056                                 port->full_duplex = 1;
1057                                 break;
1058                         default:
1059                                 port->port_speed = 0;
1060                                 port->full_duplex = 0;
1061                                 break;
1062                         }
1063                 } else {
1064                         ehea_error("Failed sensing port speed");
1065                         ret = -EIO;
1066                 }
1067         } else {
1068                 if (hret == H_AUTHORITY) {
1069                         ehea_info("Hypervisor denied setting port speed");
1070                         ret = -EPERM;
1071                 } else {
1072                         ret = -EIO;
1073                         ehea_error("Failed setting port speed");
1074                 }
1075         }
1076         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1077                 netif_carrier_on(port->netdev);
1078
1079         kfree(cb4);
1080 out:
1081         return ret;
1082 }
1083
1084 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1085 {
1086         int ret;
1087         u8 ec;
1088         u8 portnum;
1089         struct ehea_port *port;
1090
1091         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1092         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1093         port = ehea_get_port(adapter, portnum);
1094
1095         switch (ec) {
1096         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1097
1098                 if (!port) {
1099                         ehea_error("unknown portnum %x", portnum);
1100                         break;
1101                 }
1102
1103                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1104                         if (!netif_carrier_ok(port->netdev)) {
1105                                 ret = ehea_sense_port_attr(port);
1106                                 if (ret) {
1107                                         ehea_error("failed resensing port "
1108                                                    "attributes");
1109                                         break;
1110                                 }
1111
1112                                 if (netif_msg_link(port))
1113                                         ehea_info("%s: Logical port up: %dMbps "
1114                                                   "%s Duplex",
1115                                                   port->netdev->name,
1116                                                   port->port_speed,
1117                                                   port->full_duplex ==
1118                                                   1 ? "Full" : "Half");
1119
1120                                 netif_carrier_on(port->netdev);
1121                                 netif_wake_queue(port->netdev);
1122                         }
1123                 } else
1124                         if (netif_carrier_ok(port->netdev)) {
1125                                 if (netif_msg_link(port))
1126                                         ehea_info("%s: Logical port down",
1127                                                   port->netdev->name);
1128                                 netif_carrier_off(port->netdev);
1129                                 netif_stop_queue(port->netdev);
1130                         }
1131
1132                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1133                         port->phy_link = EHEA_PHY_LINK_UP;
1134                         if (netif_msg_link(port))
1135                                 ehea_info("%s: Physical port up",
1136                                           port->netdev->name);
1137                         if (prop_carrier_state)
1138                                 netif_carrier_on(port->netdev);
1139                 } else {
1140                         port->phy_link = EHEA_PHY_LINK_DOWN;
1141                         if (netif_msg_link(port))
1142                                 ehea_info("%s: Physical port down",
1143                                           port->netdev->name);
1144                         if (prop_carrier_state)
1145                                 netif_carrier_off(port->netdev);
1146                 }
1147
1148                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1149                         ehea_info("External switch port is primary port");
1150                 else
1151                         ehea_info("External switch port is backup port");
1152
1153                 break;
1154         case EHEA_EC_ADAPTER_MALFUNC:
1155                 ehea_error("Adapter malfunction");
1156                 break;
1157         case EHEA_EC_PORT_MALFUNC:
1158                 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1159                 netif_carrier_off(port->netdev);
1160                 netif_stop_queue(port->netdev);
1161                 break;
1162         default:
1163                 ehea_error("unknown event code %x, eqe=0x%lX", ec, eqe);
1164                 break;
1165         }
1166 }
1167
1168 static void ehea_neq_tasklet(unsigned long data)
1169 {
1170         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1171         struct ehea_eqe *eqe;
1172         u64 event_mask;
1173
1174         eqe = ehea_poll_eq(adapter->neq);
1175         ehea_debug("eqe=%p", eqe);
1176
1177         while (eqe) {
1178                 ehea_debug("*eqe=%lx", eqe->entry);
1179                 ehea_parse_eqe(adapter, eqe->entry);
1180                 eqe = ehea_poll_eq(adapter->neq);
1181                 ehea_debug("next eqe=%p", eqe);
1182         }
1183
1184         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1185                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1186                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1187
1188         ehea_h_reset_events(adapter->handle,
1189                             adapter->neq->fw_handle, event_mask);
1190 }
1191
1192 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1193 {
1194         struct ehea_adapter *adapter = param;
1195         tasklet_hi_schedule(&adapter->neq_tasklet);
1196         return IRQ_HANDLED;
1197 }
1198
1199
1200 static int ehea_fill_port_res(struct ehea_port_res *pr)
1201 {
1202         int ret;
1203         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1204
1205         ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1206                                      - init_attr->act_nr_rwqes_rq2
1207                                      - init_attr->act_nr_rwqes_rq3 - 1);
1208
1209         ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1210
1211         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1212
1213         return ret;
1214 }
1215
1216 static int ehea_reg_interrupts(struct net_device *dev)
1217 {
1218         struct ehea_port *port = netdev_priv(dev);
1219         struct ehea_port_res *pr;
1220         int i, ret;
1221
1222
1223         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1224                  dev->name);
1225
1226         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1227                                   ehea_qp_aff_irq_handler,
1228                                   IRQF_DISABLED, port->int_aff_name, port);
1229         if (ret) {
1230                 ehea_error("failed registering irq for qp_aff_irq_handler:"
1231                            "ist=%X", port->qp_eq->attr.ist1);
1232                 goto out_free_qpeq;
1233         }
1234
1235         if (netif_msg_ifup(port))
1236                 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1237                           "registered", port->qp_eq->attr.ist1);
1238
1239
1240         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1241                 pr = &port->port_res[i];
1242                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1243                          "%s-queue%d", dev->name, i);
1244                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1245                                           ehea_recv_irq_handler,
1246                                           IRQF_DISABLED, pr->int_send_name,
1247                                           pr);
1248                 if (ret) {
1249                         ehea_error("failed registering irq for ehea_queue "
1250                                    "port_res_nr:%d, ist=%X", i,
1251                                    pr->eq->attr.ist1);
1252                         goto out_free_req;
1253                 }
1254                 if (netif_msg_ifup(port))
1255                         ehea_info("irq_handle 0x%X for function ehea_queue_int "
1256                                   "%d registered", pr->eq->attr.ist1, i);
1257         }
1258 out:
1259         return ret;
1260
1261
1262 out_free_req:
1263         while (--i >= 0) {
1264                 u32 ist = port->port_res[i].eq->attr.ist1;
1265                 ibmebus_free_irq(ist, &port->port_res[i]);
1266         }
1267
1268 out_free_qpeq:
1269         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1270         i = port->num_def_qps;
1271
1272         goto out;
1273
1274 }
1275
1276 static void ehea_free_interrupts(struct net_device *dev)
1277 {
1278         struct ehea_port *port = netdev_priv(dev);
1279         struct ehea_port_res *pr;
1280         int i;
1281
1282         /* send */
1283
1284         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1285                 pr = &port->port_res[i];
1286                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1287                 if (netif_msg_intr(port))
1288                         ehea_info("free send irq for res %d with handle 0x%X",
1289                                   i, pr->eq->attr.ist1);
1290         }
1291
1292         /* associated events */
1293         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1294         if (netif_msg_intr(port))
1295                 ehea_info("associated event interrupt for handle 0x%X freed",
1296                           port->qp_eq->attr.ist1);
1297 }
1298
1299 static int ehea_configure_port(struct ehea_port *port)
1300 {
1301         int ret, i;
1302         u64 hret, mask;
1303         struct hcp_ehea_port_cb0 *cb0;
1304
1305         ret = -ENOMEM;
1306         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1307         if (!cb0)
1308                 goto out;
1309
1310         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1311                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1312                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1313                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1314                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1315                                       PXLY_RC_VLAN_FILTER)
1316                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1317
1318         for (i = 0; i < port->num_mcs; i++)
1319                 if (use_mcs)
1320                         cb0->default_qpn_arr[i] =
1321                                 port->port_res[i].qp->init_attr.qp_nr;
1322                 else
1323                         cb0->default_qpn_arr[i] =
1324                                 port->port_res[0].qp->init_attr.qp_nr;
1325
1326         if (netif_msg_ifup(port))
1327                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1328
1329         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1330              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1331
1332         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1333                                        port->logical_port_id,
1334                                        H_PORT_CB0, mask, cb0);
1335         ret = -EIO;
1336         if (hret != H_SUCCESS)
1337                 goto out_free;
1338
1339         ret = 0;
1340
1341 out_free:
1342         kfree(cb0);
1343 out:
1344         return ret;
1345 }
1346
1347 int ehea_gen_smrs(struct ehea_port_res *pr)
1348 {
1349         int ret;
1350         struct ehea_adapter *adapter = pr->port->adapter;
1351
1352         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1353         if (ret)
1354                 goto out;
1355
1356         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1357         if (ret)
1358                 goto out_free;
1359
1360         return 0;
1361
1362 out_free:
1363         ehea_rem_mr(&pr->send_mr);
1364 out:
1365         ehea_error("Generating SMRS failed\n");
1366         return -EIO;
1367 }
1368
1369 int ehea_rem_smrs(struct ehea_port_res *pr)
1370 {
1371         if ((ehea_rem_mr(&pr->send_mr))
1372             || (ehea_rem_mr(&pr->recv_mr)))
1373                 return -EIO;
1374         else
1375                 return 0;
1376 }
1377
1378 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1379 {
1380         int arr_size = sizeof(void *) * max_q_entries;
1381
1382         q_skba->arr = vmalloc(arr_size);
1383         if (!q_skba->arr)
1384                 return -ENOMEM;
1385
1386         memset(q_skba->arr, 0, arr_size);
1387
1388         q_skba->len = max_q_entries;
1389         q_skba->index = 0;
1390         q_skba->os_skbs = 0;
1391
1392         return 0;
1393 }
1394
1395 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1396                               struct port_res_cfg *pr_cfg, int queue_token)
1397 {
1398         struct ehea_adapter *adapter = port->adapter;
1399         enum ehea_eq_type eq_type = EHEA_EQ;
1400         struct ehea_qp_init_attr *init_attr = NULL;
1401         int ret = -EIO;
1402
1403         memset(pr, 0, sizeof(struct ehea_port_res));
1404
1405         pr->port = port;
1406         spin_lock_init(&pr->xmit_lock);
1407         spin_lock_init(&pr->netif_queue);
1408
1409         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1410         if (!pr->eq) {
1411                 ehea_error("create_eq failed (eq)");
1412                 goto out_free;
1413         }
1414
1415         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1416                                      pr->eq->fw_handle,
1417                                      port->logical_port_id);
1418         if (!pr->recv_cq) {
1419                 ehea_error("create_cq failed (cq_recv)");
1420                 goto out_free;
1421         }
1422
1423         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1424                                      pr->eq->fw_handle,
1425                                      port->logical_port_id);
1426         if (!pr->send_cq) {
1427                 ehea_error("create_cq failed (cq_send)");
1428                 goto out_free;
1429         }
1430
1431         if (netif_msg_ifup(port))
1432                 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1433                           pr->send_cq->attr.act_nr_of_cqes,
1434                           pr->recv_cq->attr.act_nr_of_cqes);
1435
1436         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1437         if (!init_attr) {
1438                 ret = -ENOMEM;
1439                 ehea_error("no mem for ehea_qp_init_attr");
1440                 goto out_free;
1441         }
1442
1443         init_attr->low_lat_rq1 = 1;
1444         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1445         init_attr->rq_count = 3;
1446         init_attr->qp_token = queue_token;
1447         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1448         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1449         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1450         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1451         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1452         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1453         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1454         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1455         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1456         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1457         init_attr->port_nr = port->logical_port_id;
1458         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1459         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1460         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1461
1462         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1463         if (!pr->qp) {
1464                 ehea_error("create_qp failed");
1465                 ret = -EIO;
1466                 goto out_free;
1467         }
1468
1469         if (netif_msg_ifup(port))
1470                 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1471                           "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1472                           init_attr->act_nr_send_wqes,
1473                           init_attr->act_nr_rwqes_rq1,
1474                           init_attr->act_nr_rwqes_rq2,
1475                           init_attr->act_nr_rwqes_rq3);
1476
1477         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1478
1479         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1480         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1481         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1482         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1483         if (ret)
1484                 goto out_free;
1485
1486         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1487         if (ehea_gen_smrs(pr) != 0) {
1488                 ret = -EIO;
1489                 goto out_free;
1490         }
1491
1492         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1493
1494         kfree(init_attr);
1495
1496         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1497
1498         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1499         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1500         pr->lro_mgr.lro_arr = pr->lro_desc;
1501         pr->lro_mgr.get_skb_header = get_skb_hdr;
1502         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1503         pr->lro_mgr.dev = port->netdev;
1504         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1505         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1506
1507         ret = 0;
1508         goto out;
1509
1510 out_free:
1511         kfree(init_attr);
1512         vfree(pr->sq_skba.arr);
1513         vfree(pr->rq1_skba.arr);
1514         vfree(pr->rq2_skba.arr);
1515         vfree(pr->rq3_skba.arr);
1516         ehea_destroy_qp(pr->qp);
1517         ehea_destroy_cq(pr->send_cq);
1518         ehea_destroy_cq(pr->recv_cq);
1519         ehea_destroy_eq(pr->eq);
1520 out:
1521         return ret;
1522 }
1523
1524 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1525 {
1526         int ret, i;
1527
1528         ret = ehea_destroy_qp(pr->qp);
1529
1530         if (!ret) {
1531                 ehea_destroy_cq(pr->send_cq);
1532                 ehea_destroy_cq(pr->recv_cq);
1533                 ehea_destroy_eq(pr->eq);
1534
1535                 for (i = 0; i < pr->rq1_skba.len; i++)
1536                         if (pr->rq1_skba.arr[i])
1537                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1538
1539                 for (i = 0; i < pr->rq2_skba.len; i++)
1540                         if (pr->rq2_skba.arr[i])
1541                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1542
1543                 for (i = 0; i < pr->rq3_skba.len; i++)
1544                         if (pr->rq3_skba.arr[i])
1545                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1546
1547                 for (i = 0; i < pr->sq_skba.len; i++)
1548                         if (pr->sq_skba.arr[i])
1549                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1550
1551                 vfree(pr->rq1_skba.arr);
1552                 vfree(pr->rq2_skba.arr);
1553                 vfree(pr->rq3_skba.arr);
1554                 vfree(pr->sq_skba.arr);
1555                 ret = ehea_rem_smrs(pr);
1556         }
1557         return ret;
1558 }
1559
1560 /*
1561  * The write_* functions store information in swqe which is used by
1562  * the hardware to calculate the ip/tcp/udp checksum
1563  */
1564
1565 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1566                                       const struct sk_buff *skb)
1567 {
1568         swqe->ip_start = skb_network_offset(skb);
1569         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1570 }
1571
1572 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1573                                         const struct sk_buff *skb)
1574 {
1575         swqe->tcp_offset =
1576                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1577
1578         swqe->tcp_end = (u16)skb->len - 1;
1579 }
1580
1581 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1582                                         const struct sk_buff *skb)
1583 {
1584         swqe->tcp_offset =
1585                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1586
1587         swqe->tcp_end = (u16)skb->len - 1;
1588 }
1589
1590
1591 static void write_swqe2_TSO(struct sk_buff *skb,
1592                             struct ehea_swqe *swqe, u32 lkey)
1593 {
1594         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1595         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1596         int skb_data_size = skb->len - skb->data_len;
1597         int headersize;
1598
1599         /* Packet is TCP with TSO enabled */
1600         swqe->tx_control |= EHEA_SWQE_TSO;
1601         swqe->mss = skb_shinfo(skb)->gso_size;
1602         /* copy only eth/ip/tcp headers to immediate data and
1603          * the rest of skb->data to sg1entry
1604          */
1605         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1606
1607         skb_data_size = skb->len - skb->data_len;
1608
1609         if (skb_data_size >= headersize) {
1610                 /* copy immediate data */
1611                 skb_copy_from_linear_data(skb, imm_data, headersize);
1612                 swqe->immediate_data_length = headersize;
1613
1614                 if (skb_data_size > headersize) {
1615                         /* set sg1entry data */
1616                         sg1entry->l_key = lkey;
1617                         sg1entry->len = skb_data_size - headersize;
1618                         sg1entry->vaddr =
1619                                 ehea_map_vaddr(skb->data + headersize);
1620                         swqe->descriptors++;
1621                 }
1622         } else
1623                 ehea_error("cannot handle fragmented headers");
1624 }
1625
1626 static void write_swqe2_nonTSO(struct sk_buff *skb,
1627                                struct ehea_swqe *swqe, u32 lkey)
1628 {
1629         int skb_data_size = skb->len - skb->data_len;
1630         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1631         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1632
1633         /* Packet is any nonTSO type
1634          *
1635          * Copy as much as possible skb->data to immediate data and
1636          * the rest to sg1entry
1637          */
1638         if (skb_data_size >= SWQE2_MAX_IMM) {
1639                 /* copy immediate data */
1640                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1641
1642                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1643
1644                 if (skb_data_size > SWQE2_MAX_IMM) {
1645                         /* copy sg1entry data */
1646                         sg1entry->l_key = lkey;
1647                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1648                         sg1entry->vaddr =
1649                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1650                         swqe->descriptors++;
1651                 }
1652         } else {
1653                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1654                 swqe->immediate_data_length = skb_data_size;
1655         }
1656 }
1657
1658 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1659                                     struct ehea_swqe *swqe, u32 lkey)
1660 {
1661         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1662         skb_frag_t *frag;
1663         int nfrags, sg1entry_contains_frag_data, i;
1664
1665         nfrags = skb_shinfo(skb)->nr_frags;
1666         sg1entry = &swqe->u.immdata_desc.sg_entry;
1667         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1668         swqe->descriptors = 0;
1669         sg1entry_contains_frag_data = 0;
1670
1671         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1672                 write_swqe2_TSO(skb, swqe, lkey);
1673         else
1674                 write_swqe2_nonTSO(skb, swqe, lkey);
1675
1676         /* write descriptors */
1677         if (nfrags > 0) {
1678                 if (swqe->descriptors == 0) {
1679                         /* sg1entry not yet used */
1680                         frag = &skb_shinfo(skb)->frags[0];
1681
1682                         /* copy sg1entry data */
1683                         sg1entry->l_key = lkey;
1684                         sg1entry->len = frag->size;
1685                         sg1entry->vaddr =
1686                                 ehea_map_vaddr(page_address(frag->page)
1687                                                + frag->page_offset);
1688                         swqe->descriptors++;
1689                         sg1entry_contains_frag_data = 1;
1690                 }
1691
1692                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1693
1694                         frag = &skb_shinfo(skb)->frags[i];
1695                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1696
1697                         sgentry->l_key = lkey;
1698                         sgentry->len = frag->size;
1699                         sgentry->vaddr =
1700                                 ehea_map_vaddr(page_address(frag->page)
1701                                                + frag->page_offset);
1702                         swqe->descriptors++;
1703                 }
1704         }
1705 }
1706
1707 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1708 {
1709         int ret = 0;
1710         u64 hret;
1711         u8 reg_type;
1712
1713         /* De/Register untagged packets */
1714         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1715         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1716                                      port->logical_port_id,
1717                                      reg_type, port->mac_addr, 0, hcallid);
1718         if (hret != H_SUCCESS) {
1719                 ehea_error("%sregistering bc address failed (tagged)",
1720                            hcallid == H_REG_BCMC ? "" : "de");
1721                 ret = -EIO;
1722                 goto out_herr;
1723         }
1724
1725         /* De/Register VLAN packets */
1726         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1727         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1728                                      port->logical_port_id,
1729                                      reg_type, port->mac_addr, 0, hcallid);
1730         if (hret != H_SUCCESS) {
1731                 ehea_error("%sregistering bc address failed (vlan)",
1732                            hcallid == H_REG_BCMC ? "" : "de");
1733                 ret = -EIO;
1734         }
1735 out_herr:
1736         return ret;
1737 }
1738
1739 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1740 {
1741         struct ehea_port *port = netdev_priv(dev);
1742         struct sockaddr *mac_addr = sa;
1743         struct hcp_ehea_port_cb0 *cb0;
1744         int ret;
1745         u64 hret;
1746
1747         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1748                 ret = -EADDRNOTAVAIL;
1749                 goto out;
1750         }
1751
1752         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1753         if (!cb0) {
1754                 ehea_error("no mem for cb0");
1755                 ret = -ENOMEM;
1756                 goto out;
1757         }
1758
1759         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1760
1761         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1762
1763         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1764                                        port->logical_port_id, H_PORT_CB0,
1765                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1766         if (hret != H_SUCCESS) {
1767                 ret = -EIO;
1768                 goto out_free;
1769         }
1770
1771         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1772
1773         spin_lock(&ehea_bcmc_regs.lock);
1774
1775         /* Deregister old MAC in pHYP */
1776         if (port->state == EHEA_PORT_UP) {
1777                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1778                 if (ret)
1779                         goto out_upregs;
1780         }
1781
1782         port->mac_addr = cb0->port_mac_addr << 16;
1783
1784         /* Register new MAC in pHYP */
1785         if (port->state == EHEA_PORT_UP) {
1786                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1787                 if (ret)
1788                         goto out_upregs;
1789         }
1790
1791         ret = 0;
1792
1793 out_upregs:
1794         ehea_update_bcmc_registrations();
1795         spin_unlock(&ehea_bcmc_regs.lock);
1796 out_free:
1797         kfree(cb0);
1798 out:
1799         return ret;
1800 }
1801
1802 static void ehea_promiscuous_error(u64 hret, int enable)
1803 {
1804         if (hret == H_AUTHORITY)
1805                 ehea_info("Hypervisor denied %sabling promiscuous mode",
1806                           enable == 1 ? "en" : "dis");
1807         else
1808                 ehea_error("failed %sabling promiscuous mode",
1809                            enable == 1 ? "en" : "dis");
1810 }
1811
1812 static void ehea_promiscuous(struct net_device *dev, int enable)
1813 {
1814         struct ehea_port *port = netdev_priv(dev);
1815         struct hcp_ehea_port_cb7 *cb7;
1816         u64 hret;
1817
1818         if ((enable && port->promisc) || (!enable && !port->promisc))
1819                 return;
1820
1821         cb7 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
1822         if (!cb7) {
1823                 ehea_error("no mem for cb7");
1824                 goto out;
1825         }
1826
1827         /* Modify Pxs_DUCQPN in CB7 */
1828         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1829
1830         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1831                                        port->logical_port_id,
1832                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1833         if (hret) {
1834                 ehea_promiscuous_error(hret, enable);
1835                 goto out;
1836         }
1837
1838         port->promisc = enable;
1839 out:
1840         kfree(cb7);
1841         return;
1842 }
1843
1844 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1845                                      u32 hcallid)
1846 {
1847         u64 hret;
1848         u8 reg_type;
1849
1850         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1851                  | EHEA_BCMC_UNTAGGED;
1852
1853         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1854                                      port->logical_port_id,
1855                                      reg_type, mc_mac_addr, 0, hcallid);
1856         if (hret)
1857                 goto out;
1858
1859         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1860                  | EHEA_BCMC_VLANID_ALL;
1861
1862         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1863                                      port->logical_port_id,
1864                                      reg_type, mc_mac_addr, 0, hcallid);
1865 out:
1866         return hret;
1867 }
1868
1869 static int ehea_drop_multicast_list(struct net_device *dev)
1870 {
1871         struct ehea_port *port = netdev_priv(dev);
1872         struct ehea_mc_list *mc_entry = port->mc_list;
1873         struct list_head *pos;
1874         struct list_head *temp;
1875         int ret = 0;
1876         u64 hret;
1877
1878         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1879                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1880
1881                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1882                                                  H_DEREG_BCMC);
1883                 if (hret) {
1884                         ehea_error("failed deregistering mcast MAC");
1885                         ret = -EIO;
1886                 }
1887
1888                 list_del(pos);
1889                 kfree(mc_entry);
1890         }
1891         return ret;
1892 }
1893
1894 static void ehea_allmulti(struct net_device *dev, int enable)
1895 {
1896         struct ehea_port *port = netdev_priv(dev);
1897         u64 hret;
1898
1899         if (!port->allmulti) {
1900                 if (enable) {
1901                         /* Enable ALLMULTI */
1902                         ehea_drop_multicast_list(dev);
1903                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1904                         if (!hret)
1905                                 port->allmulti = 1;
1906                         else
1907                                 ehea_error("failed enabling IFF_ALLMULTI");
1908                 }
1909         } else
1910                 if (!enable) {
1911                         /* Disable ALLMULTI */
1912                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1913                         if (!hret)
1914                                 port->allmulti = 0;
1915                         else
1916                                 ehea_error("failed disabling IFF_ALLMULTI");
1917                 }
1918 }
1919
1920 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1921 {
1922         struct ehea_mc_list *ehea_mcl_entry;
1923         u64 hret;
1924
1925         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1926         if (!ehea_mcl_entry) {
1927                 ehea_error("no mem for mcl_entry");
1928                 return;
1929         }
1930
1931         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1932
1933         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1934
1935         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1936                                          H_REG_BCMC);
1937         if (!hret)
1938                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1939         else {
1940                 ehea_error("failed registering mcast MAC");
1941                 kfree(ehea_mcl_entry);
1942         }
1943 }
1944
1945 static void ehea_set_multicast_list(struct net_device *dev)
1946 {
1947         struct ehea_port *port = netdev_priv(dev);
1948         struct dev_mc_list *k_mcl_entry;
1949         int ret, i;
1950
1951         if (dev->flags & IFF_PROMISC) {
1952                 ehea_promiscuous(dev, 1);
1953                 return;
1954         }
1955         ehea_promiscuous(dev, 0);
1956
1957         spin_lock(&ehea_bcmc_regs.lock);
1958
1959         if (dev->flags & IFF_ALLMULTI) {
1960                 ehea_allmulti(dev, 1);
1961                 goto out;
1962         }
1963         ehea_allmulti(dev, 0);
1964
1965         if (dev->mc_count) {
1966                 ret = ehea_drop_multicast_list(dev);
1967                 if (ret) {
1968                         /* Dropping the current multicast list failed.
1969                          * Enabling ALL_MULTI is the best we can do.
1970                          */
1971                         ehea_allmulti(dev, 1);
1972                 }
1973
1974                 if (dev->mc_count > port->adapter->max_mc_mac) {
1975                         ehea_info("Mcast registration limit reached (0x%lx). "
1976                                   "Use ALLMULTI!",
1977                                   port->adapter->max_mc_mac);
1978                         goto out;
1979                 }
1980
1981                 for (i = 0, k_mcl_entry = dev->mc_list; i < dev->mc_count; i++,
1982                              k_mcl_entry = k_mcl_entry->next)
1983                         ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1984
1985         }
1986 out:
1987         ehea_update_bcmc_registrations();
1988         spin_unlock(&ehea_bcmc_regs.lock);
1989         return;
1990 }
1991
1992 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1993 {
1994         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1995                 return -EINVAL;
1996         dev->mtu = new_mtu;
1997         return 0;
1998 }
1999
2000 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2001                        struct ehea_swqe *swqe, u32 lkey)
2002 {
2003         if (skb->protocol == htons(ETH_P_IP)) {
2004                 const struct iphdr *iph = ip_hdr(skb);
2005
2006                 /* IPv4 */
2007                 swqe->tx_control |= EHEA_SWQE_CRC
2008                                  | EHEA_SWQE_IP_CHECKSUM
2009                                  | EHEA_SWQE_TCP_CHECKSUM
2010                                  | EHEA_SWQE_IMM_DATA_PRESENT
2011                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2012
2013                 write_ip_start_end(swqe, skb);
2014
2015                 if (iph->protocol == IPPROTO_UDP) {
2016                         if ((iph->frag_off & IP_MF)
2017                             || (iph->frag_off & IP_OFFSET))
2018                                 /* IP fragment, so don't change cs */
2019                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2020                         else
2021                                 write_udp_offset_end(swqe, skb);
2022                 } else if (iph->protocol == IPPROTO_TCP) {
2023                         write_tcp_offset_end(swqe, skb);
2024                 }
2025
2026                 /* icmp (big data) and ip segmentation packets (all other ip
2027                    packets) do not require any special handling */
2028
2029         } else {
2030                 /* Other Ethernet Protocol */
2031                 swqe->tx_control |= EHEA_SWQE_CRC
2032                                  | EHEA_SWQE_IMM_DATA_PRESENT
2033                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2034         }
2035
2036         write_swqe2_data(skb, dev, swqe, lkey);
2037 }
2038
2039 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2040                        struct ehea_swqe *swqe)
2041 {
2042         int nfrags = skb_shinfo(skb)->nr_frags;
2043         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2044         skb_frag_t *frag;
2045         int i;
2046
2047         if (skb->protocol == htons(ETH_P_IP)) {
2048                 const struct iphdr *iph = ip_hdr(skb);
2049
2050                 /* IPv4 */
2051                 write_ip_start_end(swqe, skb);
2052
2053                 if (iph->protocol == IPPROTO_TCP) {
2054                         swqe->tx_control |= EHEA_SWQE_CRC
2055                                          | EHEA_SWQE_IP_CHECKSUM
2056                                          | EHEA_SWQE_TCP_CHECKSUM
2057                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2058
2059                         write_tcp_offset_end(swqe, skb);
2060
2061                 } else if (iph->protocol == IPPROTO_UDP) {
2062                         if ((iph->frag_off & IP_MF)
2063                             || (iph->frag_off & IP_OFFSET))
2064                                 /* IP fragment, so don't change cs */
2065                                 swqe->tx_control |= EHEA_SWQE_CRC
2066                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2067                         else {
2068                                 swqe->tx_control |= EHEA_SWQE_CRC
2069                                                  | EHEA_SWQE_IP_CHECKSUM
2070                                                  | EHEA_SWQE_TCP_CHECKSUM
2071                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2072
2073                                 write_udp_offset_end(swqe, skb);
2074                         }
2075                 } else {
2076                         /* icmp (big data) and
2077                            ip segmentation packets (all other ip packets) */
2078                         swqe->tx_control |= EHEA_SWQE_CRC
2079                                          | EHEA_SWQE_IP_CHECKSUM
2080                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2081                 }
2082         } else {
2083                 /* Other Ethernet Protocol */
2084                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2085         }
2086         /* copy (immediate) data */
2087         if (nfrags == 0) {
2088                 /* data is in a single piece */
2089                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2090         } else {
2091                 /* first copy data from the skb->data buffer ... */
2092                 skb_copy_from_linear_data(skb, imm_data,
2093                                           skb->len - skb->data_len);
2094                 imm_data += skb->len - skb->data_len;
2095
2096                 /* ... then copy data from the fragments */
2097                 for (i = 0; i < nfrags; i++) {
2098                         frag = &skb_shinfo(skb)->frags[i];
2099                         memcpy(imm_data,
2100                                page_address(frag->page) + frag->page_offset,
2101                                frag->size);
2102                         imm_data += frag->size;
2103                 }
2104         }
2105         swqe->immediate_data_length = skb->len;
2106         dev_kfree_skb(skb);
2107 }
2108
2109 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2110 {
2111         struct tcphdr *tcp;
2112         u32 tmp;
2113
2114         if ((skb->protocol == htons(ETH_P_IP)) &&
2115             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2116                 tcp = (struct tcphdr *)(skb_network_header(skb) +
2117                                         (ip_hdr(skb)->ihl * 4));
2118                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2119                 tmp += ip_hdr(skb)->daddr % 31;
2120                 return tmp % num_qps;
2121         } else
2122                 return 0;
2123 }
2124
2125 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2126 {
2127         struct ehea_port *port = netdev_priv(dev);
2128         struct ehea_swqe *swqe;
2129         unsigned long flags;
2130         u32 lkey;
2131         int swqe_index;
2132         struct ehea_port_res *pr;
2133
2134         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2135
2136         if (!spin_trylock(&pr->xmit_lock))
2137                 return NETDEV_TX_BUSY;
2138
2139         if (pr->queue_stopped) {
2140                 spin_unlock(&pr->xmit_lock);
2141                 return NETDEV_TX_BUSY;
2142         }
2143
2144         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2145         memset(swqe, 0, SWQE_HEADER_SIZE);
2146         atomic_dec(&pr->swqe_avail);
2147
2148         if (skb->len <= SWQE3_MAX_IMM) {
2149                 u32 sig_iv = port->sig_comp_iv;
2150                 u32 swqe_num = pr->swqe_id_counter;
2151                 ehea_xmit3(skb, dev, swqe);
2152                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2153                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2154                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2155                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2156                                                       sig_iv);
2157                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2158                         pr->swqe_ll_count = 0;
2159                 } else
2160                         pr->swqe_ll_count += 1;
2161         } else {
2162                 swqe->wr_id =
2163                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2164                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2165                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2166                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2167                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2168
2169                 pr->sq_skba.index++;
2170                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2171
2172                 lkey = pr->send_mr.lkey;
2173                 ehea_xmit2(skb, dev, swqe, lkey);
2174                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2175         }
2176         pr->swqe_id_counter += 1;
2177
2178         if (port->vgrp && vlan_tx_tag_present(skb)) {
2179                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2180                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2181         }
2182
2183         if (netif_msg_tx_queued(port)) {
2184                 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2185                 ehea_dump(swqe, 512, "swqe");
2186         }
2187
2188         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2189                 netif_stop_queue(dev);
2190                 swqe->tx_control |= EHEA_SWQE_PURGE;
2191         }
2192
2193         ehea_post_swqe(pr->qp, swqe);
2194         pr->tx_packets++;
2195
2196         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2197                 spin_lock_irqsave(&pr->netif_queue, flags);
2198                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2199                         pr->p_stats.queue_stopped++;
2200                         netif_stop_queue(dev);
2201                         pr->queue_stopped = 1;
2202                 }
2203                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2204         }
2205         dev->trans_start = jiffies;
2206         spin_unlock(&pr->xmit_lock);
2207
2208         return NETDEV_TX_OK;
2209 }
2210
2211 static void ehea_vlan_rx_register(struct net_device *dev,
2212                                   struct vlan_group *grp)
2213 {
2214         struct ehea_port *port = netdev_priv(dev);
2215         struct ehea_adapter *adapter = port->adapter;
2216         struct hcp_ehea_port_cb1 *cb1;
2217         u64 hret;
2218
2219         port->vgrp = grp;
2220
2221         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2222         if (!cb1) {
2223                 ehea_error("no mem for cb1");
2224                 goto out;
2225         }
2226
2227         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2228                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2229         if (hret != H_SUCCESS)
2230                 ehea_error("modify_ehea_port failed");
2231
2232         kfree(cb1);
2233 out:
2234         return;
2235 }
2236
2237 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2238 {
2239         struct ehea_port *port = netdev_priv(dev);
2240         struct ehea_adapter *adapter = port->adapter;
2241         struct hcp_ehea_port_cb1 *cb1;
2242         int index;
2243         u64 hret;
2244
2245         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2246         if (!cb1) {
2247                 ehea_error("no mem for cb1");
2248                 goto out;
2249         }
2250
2251         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2252                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2253         if (hret != H_SUCCESS) {
2254                 ehea_error("query_ehea_port failed");
2255                 goto out;
2256         }
2257
2258         index = (vid / 64);
2259         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2260
2261         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2262                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2263         if (hret != H_SUCCESS)
2264                 ehea_error("modify_ehea_port failed");
2265 out:
2266         kfree(cb1);
2267         return;
2268 }
2269
2270 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2271 {
2272         struct ehea_port *port = netdev_priv(dev);
2273         struct ehea_adapter *adapter = port->adapter;
2274         struct hcp_ehea_port_cb1 *cb1;
2275         int index;
2276         u64 hret;
2277
2278         vlan_group_set_device(port->vgrp, vid, NULL);
2279
2280         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2281         if (!cb1) {
2282                 ehea_error("no mem for cb1");
2283                 goto out;
2284         }
2285
2286         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2287                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2288         if (hret != H_SUCCESS) {
2289                 ehea_error("query_ehea_port failed");
2290                 goto out;
2291         }
2292
2293         index = (vid / 64);
2294         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2295
2296         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2297                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2298         if (hret != H_SUCCESS)
2299                 ehea_error("modify_ehea_port failed");
2300 out:
2301         kfree(cb1);
2302         return;
2303 }
2304
2305 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2306 {
2307         int ret = -EIO;
2308         u64 hret;
2309         u16 dummy16 = 0;
2310         u64 dummy64 = 0;
2311         struct hcp_modify_qp_cb0 *cb0;
2312
2313         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2314         if (!cb0) {
2315                 ret = -ENOMEM;
2316                 goto out;
2317         }
2318
2319         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2320                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2321         if (hret != H_SUCCESS) {
2322                 ehea_error("query_ehea_qp failed (1)");
2323                 goto out;
2324         }
2325
2326         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2327         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2328                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2329                                      &dummy64, &dummy64, &dummy16, &dummy16);
2330         if (hret != H_SUCCESS) {
2331                 ehea_error("modify_ehea_qp failed (1)");
2332                 goto out;
2333         }
2334
2335         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2336                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2337         if (hret != H_SUCCESS) {
2338                 ehea_error("query_ehea_qp failed (2)");
2339                 goto out;
2340         }
2341
2342         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2343         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2344                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2345                                      &dummy64, &dummy64, &dummy16, &dummy16);
2346         if (hret != H_SUCCESS) {
2347                 ehea_error("modify_ehea_qp failed (2)");
2348                 goto out;
2349         }
2350
2351         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2352                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2353         if (hret != H_SUCCESS) {
2354                 ehea_error("query_ehea_qp failed (3)");
2355                 goto out;
2356         }
2357
2358         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2359         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2360                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2361                                      &dummy64, &dummy64, &dummy16, &dummy16);
2362         if (hret != H_SUCCESS) {
2363                 ehea_error("modify_ehea_qp failed (3)");
2364                 goto out;
2365         }
2366
2367         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2368                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2369         if (hret != H_SUCCESS) {
2370                 ehea_error("query_ehea_qp failed (4)");
2371                 goto out;
2372         }
2373
2374         ret = 0;
2375 out:
2376         kfree(cb0);
2377         return ret;
2378 }
2379
2380 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2381                                int add_tx_qps)
2382 {
2383         int ret, i;
2384         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2385         enum ehea_eq_type eq_type = EHEA_EQ;
2386
2387         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2388                                    EHEA_MAX_ENTRIES_EQ, 1);
2389         if (!port->qp_eq) {
2390                 ret = -EINVAL;
2391                 ehea_error("ehea_create_eq failed (qp_eq)");
2392                 goto out_kill_eq;
2393         }
2394
2395         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2396         pr_cfg.max_entries_scq = sq_entries * 2;
2397         pr_cfg.max_entries_sq = sq_entries;
2398         pr_cfg.max_entries_rq1 = rq1_entries;
2399         pr_cfg.max_entries_rq2 = rq2_entries;
2400         pr_cfg.max_entries_rq3 = rq3_entries;
2401
2402         pr_cfg_small_rx.max_entries_rcq = 1;
2403         pr_cfg_small_rx.max_entries_scq = sq_entries;
2404         pr_cfg_small_rx.max_entries_sq = sq_entries;
2405         pr_cfg_small_rx.max_entries_rq1 = 1;
2406         pr_cfg_small_rx.max_entries_rq2 = 1;
2407         pr_cfg_small_rx.max_entries_rq3 = 1;
2408
2409         for (i = 0; i < def_qps; i++) {
2410                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2411                 if (ret)
2412                         goto out_clean_pr;
2413         }
2414         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2415                 ret = ehea_init_port_res(port, &port->port_res[i],
2416                                          &pr_cfg_small_rx, i);
2417                 if (ret)
2418                         goto out_clean_pr;
2419         }
2420
2421         return 0;
2422
2423 out_clean_pr:
2424         while (--i >= 0)
2425                 ehea_clean_portres(port, &port->port_res[i]);
2426
2427 out_kill_eq:
2428         ehea_destroy_eq(port->qp_eq);
2429         return ret;
2430 }
2431
2432 static int ehea_clean_all_portres(struct ehea_port *port)
2433 {
2434         int ret = 0;
2435         int i;
2436
2437         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2438                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2439
2440         ret |= ehea_destroy_eq(port->qp_eq);
2441
2442         return ret;
2443 }
2444
2445 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2446 {
2447         if (adapter->active_ports)
2448                 return;
2449
2450         ehea_rem_mr(&adapter->mr);
2451 }
2452
2453 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2454 {
2455         if (adapter->active_ports)
2456                 return 0;
2457
2458         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2459 }
2460
2461 static int ehea_up(struct net_device *dev)
2462 {
2463         int ret, i;
2464         struct ehea_port *port = netdev_priv(dev);
2465
2466         if (port->state == EHEA_PORT_UP)
2467                 return 0;
2468
2469         mutex_lock(&ehea_fw_handles.lock);
2470
2471         ret = ehea_port_res_setup(port, port->num_def_qps,
2472                                   port->num_add_tx_qps);
2473         if (ret) {
2474                 ehea_error("port_res_failed");
2475                 goto out;
2476         }
2477
2478         /* Set default QP for this port */
2479         ret = ehea_configure_port(port);
2480         if (ret) {
2481                 ehea_error("ehea_configure_port failed. ret:%d", ret);
2482                 goto out_clean_pr;
2483         }
2484
2485         ret = ehea_reg_interrupts(dev);
2486         if (ret) {
2487                 ehea_error("reg_interrupts failed. ret:%d", ret);
2488                 goto out_clean_pr;
2489         }
2490
2491         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2492                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2493                 if (ret) {
2494                         ehea_error("activate_qp failed");
2495                         goto out_free_irqs;
2496                 }
2497         }
2498
2499         for (i = 0; i < port->num_def_qps; i++) {
2500                 ret = ehea_fill_port_res(&port->port_res[i]);
2501                 if (ret) {
2502                         ehea_error("out_free_irqs");
2503                         goto out_free_irqs;
2504                 }
2505         }
2506
2507         spin_lock(&ehea_bcmc_regs.lock);
2508
2509         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2510         if (ret) {
2511                 ret = -EIO;
2512                 goto out_free_irqs;
2513         }
2514
2515         port->state = EHEA_PORT_UP;
2516
2517         ret = 0;
2518         goto out;
2519
2520 out_free_irqs:
2521         ehea_free_interrupts(dev);
2522
2523 out_clean_pr:
2524         ehea_clean_all_portres(port);
2525 out:
2526         if (ret)
2527                 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2528
2529         ehea_update_bcmc_registrations();
2530         spin_unlock(&ehea_bcmc_regs.lock);
2531
2532         ehea_update_firmware_handles();
2533         mutex_unlock(&ehea_fw_handles.lock);
2534
2535         return ret;
2536 }
2537
2538 static void port_napi_disable(struct ehea_port *port)
2539 {
2540         int i;
2541
2542         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2543                 napi_disable(&port->port_res[i].napi);
2544 }
2545
2546 static void port_napi_enable(struct ehea_port *port)
2547 {
2548         int i;
2549
2550         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2551                 napi_enable(&port->port_res[i].napi);
2552 }
2553
2554 static int ehea_open(struct net_device *dev)
2555 {
2556         int ret;
2557         struct ehea_port *port = netdev_priv(dev);
2558
2559         mutex_lock(&port->port_lock);
2560
2561         if (netif_msg_ifup(port))
2562                 ehea_info("enabling port %s", dev->name);
2563
2564         ret = ehea_up(dev);
2565         if (!ret) {
2566                 port_napi_enable(port);
2567                 netif_start_queue(dev);
2568         }
2569
2570         mutex_unlock(&port->port_lock);
2571
2572         return ret;
2573 }
2574
2575 static int ehea_down(struct net_device *dev)
2576 {
2577         int ret;
2578         struct ehea_port *port = netdev_priv(dev);
2579
2580         if (port->state == EHEA_PORT_DOWN)
2581                 return 0;
2582
2583         mutex_lock(&ehea_fw_handles.lock);
2584
2585         spin_lock(&ehea_bcmc_regs.lock);
2586         ehea_drop_multicast_list(dev);
2587         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2588
2589         ehea_free_interrupts(dev);
2590
2591         port->state = EHEA_PORT_DOWN;
2592
2593         ehea_update_bcmc_registrations();
2594         spin_unlock(&ehea_bcmc_regs.lock);
2595
2596         ret = ehea_clean_all_portres(port);
2597         if (ret)
2598                 ehea_info("Failed freeing resources for %s. ret=%i",
2599                           dev->name, ret);
2600
2601         ehea_update_firmware_handles();
2602         mutex_unlock(&ehea_fw_handles.lock);
2603
2604         return ret;
2605 }
2606
2607 static int ehea_stop(struct net_device *dev)
2608 {
2609         int ret;
2610         struct ehea_port *port = netdev_priv(dev);
2611
2612         if (netif_msg_ifdown(port))
2613                 ehea_info("disabling port %s", dev->name);
2614
2615         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2616         cancel_work_sync(&port->reset_task);
2617         mutex_lock(&port->port_lock);
2618         netif_stop_queue(dev);
2619         port_napi_disable(port);
2620         ret = ehea_down(dev);
2621         mutex_unlock(&port->port_lock);
2622         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2623         return ret;
2624 }
2625
2626 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2627 {
2628         struct ehea_qp qp = *orig_qp;
2629         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2630         struct ehea_swqe *swqe;
2631         int wqe_index;
2632         int i;
2633
2634         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2635                 swqe = ehea_get_swqe(&qp, &wqe_index);
2636                 swqe->tx_control |= EHEA_SWQE_PURGE;
2637         }
2638 }
2639
2640 static void ehea_flush_sq(struct ehea_port *port)
2641 {
2642         int i;
2643
2644         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2645                 struct ehea_port_res *pr = &port->port_res[i];
2646                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2647                 int k = 0;
2648                 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2649                         msleep(5);
2650                         if (++k == 20)
2651                                 break;
2652                 }
2653         }
2654 }
2655
2656 int ehea_stop_qps(struct net_device *dev)
2657 {
2658         struct ehea_port *port = netdev_priv(dev);
2659         struct ehea_adapter *adapter = port->adapter;
2660         struct hcp_modify_qp_cb0 *cb0;
2661         int ret = -EIO;
2662         int dret;
2663         int i;
2664         u64 hret;
2665         u64 dummy64 = 0;
2666         u16 dummy16 = 0;
2667
2668         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2669         if (!cb0) {
2670                 ret = -ENOMEM;
2671                 goto out;
2672         }
2673
2674         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2675                 struct ehea_port_res *pr =  &port->port_res[i];
2676                 struct ehea_qp *qp = pr->qp;
2677
2678                 /* Purge send queue */
2679                 ehea_purge_sq(qp);
2680
2681                 /* Disable queue pair */
2682                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2683                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2684                                             cb0);
2685                 if (hret != H_SUCCESS) {
2686                         ehea_error("query_ehea_qp failed (1)");
2687                         goto out;
2688                 }
2689
2690                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2691                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2692
2693                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2694                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2695                                                             1), cb0, &dummy64,
2696                                              &dummy64, &dummy16, &dummy16);
2697                 if (hret != H_SUCCESS) {
2698                         ehea_error("modify_ehea_qp failed (1)");
2699                         goto out;
2700                 }
2701
2702                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2703                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2704                                             cb0);
2705                 if (hret != H_SUCCESS) {
2706                         ehea_error("query_ehea_qp failed (2)");
2707                         goto out;
2708                 }
2709
2710                 /* deregister shared memory regions */
2711                 dret = ehea_rem_smrs(pr);
2712                 if (dret) {
2713                         ehea_error("unreg shared memory region failed");
2714                         goto out;
2715                 }
2716         }
2717
2718         ret = 0;
2719 out:
2720         kfree(cb0);
2721
2722         return ret;
2723 }
2724
2725 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2726 {
2727         struct ehea_qp qp = *orig_qp;
2728         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2729         struct ehea_rwqe *rwqe;
2730         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2731         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2732         struct sk_buff *skb;
2733         u32 lkey = pr->recv_mr.lkey;
2734
2735
2736         int i;
2737         int index;
2738
2739         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2740                 rwqe = ehea_get_next_rwqe(&qp, 2);
2741                 rwqe->sg_list[0].l_key = lkey;
2742                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2743                 skb = skba_rq2[index];
2744                 if (skb)
2745                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2746         }
2747
2748         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2749                 rwqe = ehea_get_next_rwqe(&qp, 3);
2750                 rwqe->sg_list[0].l_key = lkey;
2751                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2752                 skb = skba_rq3[index];
2753                 if (skb)
2754                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2755         }
2756 }
2757
2758 int ehea_restart_qps(struct net_device *dev)
2759 {
2760         struct ehea_port *port = netdev_priv(dev);
2761         struct ehea_adapter *adapter = port->adapter;
2762         int ret = 0;
2763         int i;
2764
2765         struct hcp_modify_qp_cb0 *cb0;
2766         u64 hret;
2767         u64 dummy64 = 0;
2768         u16 dummy16 = 0;
2769
2770         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2771         if (!cb0) {
2772                 ret = -ENOMEM;
2773                 goto out;
2774         }
2775
2776         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2777                 struct ehea_port_res *pr =  &port->port_res[i];
2778                 struct ehea_qp *qp = pr->qp;
2779
2780                 ret = ehea_gen_smrs(pr);
2781                 if (ret) {
2782                         ehea_error("creation of shared memory regions failed");
2783                         goto out;
2784                 }
2785
2786                 ehea_update_rqs(qp, pr);
2787
2788                 /* Enable queue pair */
2789                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2790                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2791                                             cb0);
2792                 if (hret != H_SUCCESS) {
2793                         ehea_error("query_ehea_qp failed (1)");
2794                         goto out;
2795                 }
2796
2797                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2798                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2799
2800                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2801                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2802                                                             1), cb0, &dummy64,
2803                                              &dummy64, &dummy16, &dummy16);
2804                 if (hret != H_SUCCESS) {
2805                         ehea_error("modify_ehea_qp failed (1)");
2806                         goto out;
2807                 }
2808
2809                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2810                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2811                                             cb0);
2812                 if (hret != H_SUCCESS) {
2813                         ehea_error("query_ehea_qp failed (2)");
2814                         goto out;
2815                 }
2816
2817                 /* refill entire queue */
2818                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2819                 ehea_refill_rq2(pr, 0);
2820                 ehea_refill_rq3(pr, 0);
2821         }
2822 out:
2823         kfree(cb0);
2824
2825         return ret;
2826 }
2827
2828 static void ehea_reset_port(struct work_struct *work)
2829 {
2830         int ret;
2831         struct ehea_port *port =
2832                 container_of(work, struct ehea_port, reset_task);
2833         struct net_device *dev = port->netdev;
2834
2835         port->resets++;
2836         mutex_lock(&port->port_lock);
2837         netif_stop_queue(dev);
2838
2839         port_napi_disable(port);
2840
2841         ehea_down(dev);
2842
2843         ret = ehea_up(dev);
2844         if (ret)
2845                 goto out;
2846
2847         ehea_set_multicast_list(dev);
2848
2849         if (netif_msg_timer(port))
2850                 ehea_info("Device %s resetted successfully", dev->name);
2851
2852         port_napi_enable(port);
2853
2854         netif_wake_queue(dev);
2855 out:
2856         mutex_unlock(&port->port_lock);
2857         return;
2858 }
2859
2860 static void ehea_rereg_mrs(struct work_struct *work)
2861 {
2862         int ret, i;
2863         struct ehea_adapter *adapter;
2864
2865         mutex_lock(&dlpar_mem_lock);
2866         ehea_info("LPAR memory enlarged - re-initializing driver");
2867
2868         list_for_each_entry(adapter, &adapter_list, list)
2869                 if (adapter->active_ports) {
2870                         /* Shutdown all ports */
2871                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2872                                 struct ehea_port *port = adapter->port[i];
2873                                 struct net_device *dev;
2874
2875                                 if (!port)
2876                                         continue;
2877
2878                                 dev = port->netdev;
2879
2880                                 if (dev->flags & IFF_UP) {
2881                                         mutex_lock(&port->port_lock);
2882                                         netif_stop_queue(dev);
2883                                         ehea_flush_sq(port);
2884                                         ret = ehea_stop_qps(dev);
2885                                         if (ret) {
2886                                                 mutex_unlock(&port->port_lock);
2887                                                 goto out;
2888                                         }
2889                                         port_napi_disable(port);
2890                                         mutex_unlock(&port->port_lock);
2891                                 }
2892                         }
2893
2894                         /* Unregister old memory region */
2895                         ret = ehea_rem_mr(&adapter->mr);
2896                         if (ret) {
2897                                 ehea_error("unregister MR failed - driver"
2898                                            " inoperable!");
2899                                 goto out;
2900                         }
2901                 }
2902
2903         ehea_destroy_busmap();
2904         ret = ehea_create_busmap();
2905         if (ret) {
2906                 ehea_error("creating ehea busmap failed");
2907                 goto out;
2908         }
2909
2910         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2911
2912         list_for_each_entry(adapter, &adapter_list, list)
2913                 if (adapter->active_ports) {
2914                         /* Register new memory region */
2915                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2916                         if (ret) {
2917                                 ehea_error("register MR failed - driver"
2918                                            " inoperable!");
2919                                 goto out;
2920                         }
2921
2922                         /* Restart all ports */
2923                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2924                                 struct ehea_port *port = adapter->port[i];
2925
2926                                 if (port) {
2927                                         struct net_device *dev = port->netdev;
2928
2929                                         if (dev->flags & IFF_UP) {
2930                                                 mutex_lock(&port->port_lock);
2931                                                 port_napi_enable(port);
2932                                                 ret = ehea_restart_qps(dev);
2933                                                 if (!ret)
2934                                                         netif_wake_queue(dev);
2935                                                 mutex_unlock(&port->port_lock);
2936                                         }
2937                                 }
2938                         }
2939                 }
2940         ehea_info("re-initializing driver complete");
2941 out:
2942         mutex_unlock(&dlpar_mem_lock);
2943         return;
2944 }
2945
2946 static void ehea_tx_watchdog(struct net_device *dev)
2947 {
2948         struct ehea_port *port = netdev_priv(dev);
2949
2950         if (netif_carrier_ok(dev) &&
2951             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2952                 ehea_schedule_port_reset(port);
2953 }
2954
2955 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2956 {
2957         struct hcp_query_ehea *cb;
2958         u64 hret;
2959         int ret;
2960
2961         cb = kzalloc(PAGE_SIZE, GFP_KERNEL);
2962         if (!cb) {
2963                 ret = -ENOMEM;
2964                 goto out;
2965         }
2966
2967         hret = ehea_h_query_ehea(adapter->handle, cb);
2968
2969         if (hret != H_SUCCESS) {
2970                 ret = -EIO;
2971                 goto out_herr;
2972         }
2973
2974         adapter->max_mc_mac = cb->max_mc_mac - 1;
2975         ret = 0;
2976
2977 out_herr:
2978         kfree(cb);
2979 out:
2980         return ret;
2981 }
2982
2983 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2984 {
2985         struct hcp_ehea_port_cb4 *cb4;
2986         u64 hret;
2987         int ret = 0;
2988
2989         *jumbo = 0;
2990
2991         /* (Try to) enable *jumbo frames */
2992         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2993         if (!cb4) {
2994                 ehea_error("no mem for cb4");
2995                 ret = -ENOMEM;
2996                 goto out;
2997         } else {
2998                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2999                                               port->logical_port_id,
3000                                               H_PORT_CB4,
3001                                               H_PORT_CB4_JUMBO, cb4);
3002                 if (hret == H_SUCCESS) {
3003                         if (cb4->jumbo_frame)
3004                                 *jumbo = 1;
3005                         else {
3006                                 cb4->jumbo_frame = 1;
3007                                 hret = ehea_h_modify_ehea_port(port->adapter->
3008                                                                handle,
3009                                                                port->
3010                                                                logical_port_id,
3011                                                                H_PORT_CB4,
3012                                                                H_PORT_CB4_JUMBO,
3013                                                                cb4);
3014                                 if (hret == H_SUCCESS)
3015                                         *jumbo = 1;
3016                         }
3017                 } else
3018                         ret = -EINVAL;
3019
3020                 kfree(cb4);
3021         }
3022 out:
3023         return ret;
3024 }
3025
3026 static ssize_t ehea_show_port_id(struct device *dev,
3027                                  struct device_attribute *attr, char *buf)
3028 {
3029         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3030         return sprintf(buf, "%d", port->logical_port_id);
3031 }
3032
3033 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3034                    NULL);
3035
3036 static void __devinit logical_port_release(struct device *dev)
3037 {
3038         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3039         of_node_put(port->ofdev.node);
3040 }
3041
3042 static struct device *ehea_register_port(struct ehea_port *port,
3043                                          struct device_node *dn)
3044 {
3045         int ret;
3046
3047         port->ofdev.node = of_node_get(dn);
3048         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3049         port->ofdev.dev.bus = &ibmebus_bus_type;
3050
3051         sprintf(port->ofdev.dev.bus_id, "port%d", port_name_cnt++);
3052         port->ofdev.dev.release = logical_port_release;
3053
3054         ret = of_device_register(&port->ofdev);
3055         if (ret) {
3056                 ehea_error("failed to register device. ret=%d", ret);
3057                 goto out;
3058         }
3059
3060         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3061         if (ret) {
3062                 ehea_error("failed to register attributes, ret=%d", ret);
3063                 goto out_unreg_of_dev;
3064         }
3065
3066         return &port->ofdev.dev;
3067
3068 out_unreg_of_dev:
3069         of_device_unregister(&port->ofdev);
3070 out:
3071         return NULL;
3072 }
3073
3074 static void ehea_unregister_port(struct ehea_port *port)
3075 {
3076         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3077         of_device_unregister(&port->ofdev);
3078 }
3079
3080 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3081                                          u32 logical_port_id,
3082                                          struct device_node *dn)
3083 {
3084         int ret;
3085         struct net_device *dev;
3086         struct ehea_port *port;
3087         struct device *port_dev;
3088         int jumbo;
3089
3090         /* allocate memory for the port structures */
3091         dev = alloc_etherdev(sizeof(struct ehea_port));
3092
3093         if (!dev) {
3094                 ehea_error("no mem for net_device");
3095                 ret = -ENOMEM;
3096                 goto out_err;
3097         }
3098
3099         port = netdev_priv(dev);
3100
3101         mutex_init(&port->port_lock);
3102         port->state = EHEA_PORT_DOWN;
3103         port->sig_comp_iv = sq_entries / 10;
3104
3105         port->adapter = adapter;
3106         port->netdev = dev;
3107         port->logical_port_id = logical_port_id;
3108
3109         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3110
3111         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3112         if (!port->mc_list) {
3113                 ret = -ENOMEM;
3114                 goto out_free_ethdev;
3115         }
3116
3117         INIT_LIST_HEAD(&port->mc_list->list);
3118
3119         ret = ehea_sense_port_attr(port);
3120         if (ret)
3121                 goto out_free_mc_list;
3122
3123         port_dev = ehea_register_port(port, dn);
3124         if (!port_dev)
3125                 goto out_free_mc_list;
3126
3127         SET_NETDEV_DEV(dev, port_dev);
3128
3129         /* initialize net_device structure */
3130         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3131
3132         dev->open = ehea_open;
3133 #ifdef CONFIG_NET_POLL_CONTROLLER
3134         dev->poll_controller = ehea_netpoll;
3135 #endif
3136         dev->stop = ehea_stop;
3137         dev->hard_start_xmit = ehea_start_xmit;
3138         dev->get_stats = ehea_get_stats;
3139         dev->set_multicast_list = ehea_set_multicast_list;
3140         dev->set_mac_address = ehea_set_mac_addr;
3141         dev->change_mtu = ehea_change_mtu;
3142         dev->vlan_rx_register = ehea_vlan_rx_register;
3143         dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid;
3144         dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid;
3145         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3146                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3147                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3148                       | NETIF_F_LLTX;
3149         dev->tx_timeout = &ehea_tx_watchdog;
3150         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3151
3152         INIT_WORK(&port->reset_task, ehea_reset_port);
3153         ehea_set_ethtool_ops(dev);
3154
3155         ret = register_netdev(dev);
3156         if (ret) {
3157                 ehea_error("register_netdev failed. ret=%d", ret);
3158                 goto out_unreg_port;
3159         }
3160
3161         port->lro_max_aggr = lro_max_aggr;
3162
3163         ret = ehea_get_jumboframe_status(port, &jumbo);
3164         if (ret)
3165                 ehea_error("failed determining jumbo frame status for %s",
3166                            port->netdev->name);
3167
3168         ehea_info("%s: Jumbo frames are %sabled", dev->name,
3169                   jumbo == 1 ? "en" : "dis");
3170
3171         adapter->active_ports++;
3172
3173         return port;
3174
3175 out_unreg_port:
3176         ehea_unregister_port(port);
3177
3178 out_free_mc_list:
3179         kfree(port->mc_list);
3180
3181 out_free_ethdev:
3182         free_netdev(dev);
3183
3184 out_err:
3185         ehea_error("setting up logical port with id=%d failed, ret=%d",
3186                    logical_port_id, ret);
3187         return NULL;
3188 }
3189
3190 static void ehea_shutdown_single_port(struct ehea_port *port)
3191 {
3192         struct ehea_adapter *adapter = port->adapter;
3193         unregister_netdev(port->netdev);
3194         ehea_unregister_port(port);
3195         kfree(port->mc_list);
3196         free_netdev(port->netdev);
3197         adapter->active_ports--;
3198 }
3199
3200 static int ehea_setup_ports(struct ehea_adapter *adapter)
3201 {
3202         struct device_node *lhea_dn;
3203         struct device_node *eth_dn = NULL;
3204
3205         const u32 *dn_log_port_id;
3206         int i = 0;
3207
3208         lhea_dn = adapter->ofdev->node;
3209         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3210
3211                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3212                                                  NULL);
3213                 if (!dn_log_port_id) {
3214                         ehea_error("bad device node: eth_dn name=%s",
3215                                    eth_dn->full_name);
3216                         continue;
3217                 }
3218
3219                 if (ehea_add_adapter_mr(adapter)) {
3220                         ehea_error("creating MR failed");
3221                         of_node_put(eth_dn);
3222                         return -EIO;
3223                 }
3224
3225                 adapter->port[i] = ehea_setup_single_port(adapter,
3226                                                           *dn_log_port_id,
3227                                                           eth_dn);
3228                 if (adapter->port[i])
3229                         ehea_info("%s -> logical port id #%d",
3230                                   adapter->port[i]->netdev->name,
3231                                   *dn_log_port_id);
3232                 else
3233                         ehea_remove_adapter_mr(adapter);
3234
3235                 i++;
3236         };
3237         return 0;
3238 }
3239
3240 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3241                                            u32 logical_port_id)
3242 {
3243         struct device_node *lhea_dn;
3244         struct device_node *eth_dn = NULL;
3245         const u32 *dn_log_port_id;
3246
3247         lhea_dn = adapter->ofdev->node;
3248         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3249
3250                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3251                                                  NULL);
3252                 if (dn_log_port_id)
3253                         if (*dn_log_port_id == logical_port_id)
3254                                 return eth_dn;
3255         };
3256
3257         return NULL;
3258 }
3259
3260 static ssize_t ehea_probe_port(struct device *dev,
3261                                struct device_attribute *attr,
3262                                const char *buf, size_t count)
3263 {
3264         struct ehea_adapter *adapter = dev->driver_data;
3265         struct ehea_port *port;
3266         struct device_node *eth_dn = NULL;
3267         int i;
3268
3269         u32 logical_port_id;
3270
3271         sscanf(buf, "%d", &logical_port_id);
3272
3273         port = ehea_get_port(adapter, logical_port_id);
3274
3275         if (port) {
3276                 ehea_info("adding port with logical port id=%d failed. port "
3277                           "already configured as %s.", logical_port_id,
3278                           port->netdev->name);
3279                 return -EINVAL;
3280         }
3281
3282         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3283
3284         if (!eth_dn) {
3285                 ehea_info("no logical port with id %d found", logical_port_id);
3286                 return -EINVAL;
3287         }
3288
3289         if (ehea_add_adapter_mr(adapter)) {
3290                 ehea_error("creating MR failed");
3291                 return -EIO;
3292         }
3293
3294         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3295
3296         of_node_put(eth_dn);
3297
3298         if (port) {
3299                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3300                         if (!adapter->port[i]) {
3301                                 adapter->port[i] = port;
3302                                 break;
3303                         }
3304
3305                 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3306                           logical_port_id);
3307         } else {
3308                 ehea_remove_adapter_mr(adapter);
3309                 return -EIO;
3310         }
3311
3312         return (ssize_t) count;
3313 }
3314
3315 static ssize_t ehea_remove_port(struct device *dev,
3316                                 struct device_attribute *attr,
3317                                 const char *buf, size_t count)
3318 {
3319         struct ehea_adapter *adapter = dev->driver_data;
3320         struct ehea_port *port;
3321         int i;
3322         u32 logical_port_id;
3323
3324         sscanf(buf, "%d", &logical_port_id);
3325
3326         port = ehea_get_port(adapter, logical_port_id);
3327
3328         if (port) {
3329                 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3330                           logical_port_id);
3331
3332                 ehea_shutdown_single_port(port);
3333
3334                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3335                         if (adapter->port[i] == port) {
3336                                 adapter->port[i] = NULL;
3337                                 break;
3338                         }
3339         } else {
3340                 ehea_error("removing port with logical port id=%d failed. port "
3341                            "not configured.", logical_port_id);
3342                 return -EINVAL;
3343         }
3344
3345         ehea_remove_adapter_mr(adapter);
3346
3347         return (ssize_t) count;
3348 }
3349
3350 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3351 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3352
3353 int ehea_create_device_sysfs(struct of_device *dev)
3354 {
3355         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3356         if (ret)
3357                 goto out;
3358
3359         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3360 out:
3361         return ret;
3362 }
3363
3364 void ehea_remove_device_sysfs(struct of_device *dev)
3365 {
3366         device_remove_file(&dev->dev, &dev_attr_probe_port);
3367         device_remove_file(&dev->dev, &dev_attr_remove_port);
3368 }
3369
3370 static int __devinit ehea_probe_adapter(struct of_device *dev,
3371                                         const struct of_device_id *id)
3372 {
3373         struct ehea_adapter *adapter;
3374         const u64 *adapter_handle;
3375         int ret;
3376
3377         if (!dev || !dev->node) {
3378                 ehea_error("Invalid ibmebus device probed");
3379                 return -EINVAL;
3380         }
3381         mutex_lock(&ehea_fw_handles.lock);
3382
3383         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3384         if (!adapter) {
3385                 ret = -ENOMEM;
3386                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3387                 goto out;
3388         }
3389
3390         list_add(&adapter->list, &adapter_list);
3391
3392         adapter->ofdev = dev;
3393
3394         adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3395                                          NULL);
3396         if (adapter_handle)
3397                 adapter->handle = *adapter_handle;
3398
3399         if (!adapter->handle) {
3400                 dev_err(&dev->dev, "failed getting handle for adapter"
3401                         " '%s'\n", dev->node->full_name);
3402                 ret = -ENODEV;
3403                 goto out_free_ad;
3404         }
3405
3406         adapter->pd = EHEA_PD_ID;
3407
3408         dev->dev.driver_data = adapter;
3409
3410
3411         /* initialize adapter and ports */
3412         /* get adapter properties */
3413         ret = ehea_sense_adapter_attr(adapter);
3414         if (ret) {
3415                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3416                 goto out_free_ad;
3417         }
3418
3419         adapter->neq = ehea_create_eq(adapter,
3420                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3421         if (!adapter->neq) {
3422                 ret = -EIO;
3423                 dev_err(&dev->dev, "NEQ creation failed\n");
3424                 goto out_free_ad;
3425         }
3426
3427         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3428                      (unsigned long)adapter);
3429
3430         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3431                                   ehea_interrupt_neq, IRQF_DISABLED,
3432                                   "ehea_neq", adapter);
3433         if (ret) {
3434                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3435                 goto out_kill_eq;
3436         }
3437
3438         ret = ehea_create_device_sysfs(dev);
3439         if (ret)
3440                 goto out_free_irq;
3441
3442         ret = ehea_setup_ports(adapter);
3443         if (ret) {
3444                 dev_err(&dev->dev, "setup_ports failed\n");
3445                 goto out_rem_dev_sysfs;
3446         }
3447
3448         ret = 0;
3449         goto out;
3450
3451 out_rem_dev_sysfs:
3452         ehea_remove_device_sysfs(dev);
3453
3454 out_free_irq:
3455         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3456
3457 out_kill_eq:
3458         ehea_destroy_eq(adapter->neq);
3459
3460 out_free_ad:
3461         kfree(adapter);
3462
3463 out:
3464         ehea_update_firmware_handles();
3465         mutex_unlock(&ehea_fw_handles.lock);
3466         return ret;
3467 }
3468
3469 static int __devexit ehea_remove(struct of_device *dev)
3470 {
3471         struct ehea_adapter *adapter = dev->dev.driver_data;
3472         int i;
3473
3474         for (i = 0; i < EHEA_MAX_PORTS; i++)
3475                 if (adapter->port[i]) {
3476                         ehea_shutdown_single_port(adapter->port[i]);
3477                         adapter->port[i] = NULL;
3478                 }
3479
3480         ehea_remove_device_sysfs(dev);
3481
3482         flush_scheduled_work();
3483
3484         mutex_lock(&ehea_fw_handles.lock);
3485
3486         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3487         tasklet_kill(&adapter->neq_tasklet);
3488
3489         ehea_destroy_eq(adapter->neq);
3490         ehea_remove_adapter_mr(adapter);
3491         list_del(&adapter->list);
3492         kfree(adapter);
3493
3494         ehea_update_firmware_handles();
3495         mutex_unlock(&ehea_fw_handles.lock);
3496
3497         return 0;
3498 }
3499
3500 void ehea_crash_handler(void)
3501 {
3502         int i;
3503
3504         if (ehea_fw_handles.arr)
3505                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3506                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3507                                              ehea_fw_handles.arr[i].fwh,
3508                                              FORCE_FREE);
3509
3510         if (ehea_bcmc_regs.arr)
3511                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3512                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3513                                               ehea_bcmc_regs.arr[i].port_id,
3514                                               ehea_bcmc_regs.arr[i].reg_type,
3515                                               ehea_bcmc_regs.arr[i].macaddr,
3516                                               0, H_DEREG_BCMC);
3517 }
3518
3519 static int ehea_mem_notifier(struct notifier_block *nb,
3520                              unsigned long action, void *data)
3521 {
3522         switch (action) {
3523         case MEM_OFFLINE:
3524                 ehea_info("memory has been removed");
3525                 ehea_rereg_mrs(NULL);
3526                 break;
3527         default:
3528                 break;
3529         }
3530         return NOTIFY_OK;
3531 }
3532
3533 static struct notifier_block ehea_mem_nb = {
3534         .notifier_call = ehea_mem_notifier,
3535 };
3536
3537 static int ehea_reboot_notifier(struct notifier_block *nb,
3538                                 unsigned long action, void *unused)
3539 {
3540         if (action == SYS_RESTART) {
3541                 ehea_info("Reboot: freeing all eHEA resources");
3542                 ibmebus_unregister_driver(&ehea_driver);
3543         }
3544         return NOTIFY_DONE;
3545 }
3546
3547 static struct notifier_block ehea_reboot_nb = {
3548         .notifier_call = ehea_reboot_notifier,
3549 };
3550
3551 static int check_module_parm(void)
3552 {
3553         int ret = 0;
3554
3555         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3556             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3557                 ehea_info("Bad parameter: rq1_entries");
3558                 ret = -EINVAL;
3559         }
3560         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3561             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3562                 ehea_info("Bad parameter: rq2_entries");
3563                 ret = -EINVAL;
3564         }
3565         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3566             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3567                 ehea_info("Bad parameter: rq3_entries");
3568                 ret = -EINVAL;
3569         }
3570         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3571             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3572                 ehea_info("Bad parameter: sq_entries");
3573                 ret = -EINVAL;
3574         }
3575
3576         return ret;
3577 }
3578
3579 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3580                                       char *buf)
3581 {
3582         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3583 }
3584
3585 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3586                    ehea_show_capabilities, NULL);
3587
3588 int __init ehea_module_init(void)
3589 {
3590         int ret;
3591
3592         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3593                DRV_VERSION);
3594
3595
3596         INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3597         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3598         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3599
3600         mutex_init(&ehea_fw_handles.lock);
3601         spin_lock_init(&ehea_bcmc_regs.lock);
3602
3603         ret = check_module_parm();
3604         if (ret)
3605                 goto out;
3606
3607         ret = ehea_create_busmap();
3608         if (ret)
3609                 goto out;
3610
3611         ret = register_reboot_notifier(&ehea_reboot_nb);
3612         if (ret)
3613                 ehea_info("failed registering reboot notifier");
3614
3615         ret = register_memory_notifier(&ehea_mem_nb);
3616         if (ret)
3617                 ehea_info("failed registering memory remove notifier");
3618
3619         ret = crash_shutdown_register(&ehea_crash_handler);
3620         if (ret)
3621                 ehea_info("failed registering crash handler");
3622
3623         ret = ibmebus_register_driver(&ehea_driver);
3624         if (ret) {
3625                 ehea_error("failed registering eHEA device driver on ebus");
3626                 goto out2;
3627         }
3628
3629         ret = driver_create_file(&ehea_driver.driver,
3630                                  &driver_attr_capabilities);
3631         if (ret) {
3632                 ehea_error("failed to register capabilities attribute, ret=%d",
3633                            ret);
3634                 goto out3;
3635         }
3636
3637         return ret;
3638
3639 out3:
3640         ibmebus_unregister_driver(&ehea_driver);
3641 out2:
3642         unregister_memory_notifier(&ehea_mem_nb);
3643         unregister_reboot_notifier(&ehea_reboot_nb);
3644         crash_shutdown_unregister(&ehea_crash_handler);
3645 out:
3646         return ret;
3647 }
3648
3649 static void __exit ehea_module_exit(void)
3650 {
3651         int ret;
3652
3653         flush_scheduled_work();
3654         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3655         ibmebus_unregister_driver(&ehea_driver);
3656         unregister_reboot_notifier(&ehea_reboot_nb);
3657         ret = crash_shutdown_unregister(&ehea_crash_handler);
3658         if (ret)
3659                 ehea_info("failed unregistering crash handler");
3660         unregister_memory_notifier(&ehea_mem_nb);
3661         kfree(ehea_fw_handles.arr);
3662         kfree(ehea_bcmc_regs.arr);
3663         ehea_destroy_busmap();
3664 }
3665
3666 module_init(ehea_module_init);
3667 module_exit(ehea_module_exit);