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