drivers/net/ehea/ehea_main.c

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