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/slab.h>
  36 #include <linux/if_ether.h>
  37 #include <linux/notifier.h>
  38 #include <linux/reboot.h>
  39 #include <linux/memory.h>
  40 #include <asm/kexec.h>
  41 #include <linux/mutex.h>
  42
  43 #include <net/ip.h>
  44
  45 #include "ehea.h"
  46 #include "ehea_qmr.h"
  47 #include "ehea_phyp.h"
  48
  49
  50 MODULE_LICENSE("GPL");
  51 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  52 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  53 MODULE_VERSION(DRV_VERSION);
  54
  55
  56 static int msg_level = -1;
  57 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  58 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  59 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  60 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  61 static int use_mcs;
  62 static int use_lro;
  63 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  64 static int num_tx_qps = EHEA_NUM_TX_QP;
  65 static int prop_carrier_state;
  66
  67 module_param(msg_level, int, 0);
  68 module_param(rq1_entries, int, 0);
  69 module_param(rq2_entries, int, 0);
  70 module_param(rq3_entries, int, 0);
  71 module_param(sq_entries, int, 0);
  72 module_param(prop_carrier_state, int, 0);
  73 module_param(use_mcs, int, 0);
  74 module_param(use_lro, int, 0);
  75 module_param(lro_max_aggr, int, 0);
  76 module_param(num_tx_qps, int, 0);
  77
  78 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
  79 MODULE_PARM_DESC(msg_level, "msg_level");
  80 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  81                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  82 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  83                  "[2^x - 1], x = [6..14]. Default = "
  84                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  85 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  86                  "[2^x - 1], x = [6..14]. Default = "
  87                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  88 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  89                  "[2^x - 1], x = [6..14]. Default = "
  90                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  91 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  92                  "[2^x - 1], x = [6..14]. Default = "
  93                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  94 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
  95
  96 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
  97                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
  98 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
  99                  "Default = 0");
 100
 101 static int port_name_cnt;
 102 static LIST_HEAD(adapter_list);
 103 static unsigned long ehea_driver_flags;
 104 struct work_struct ehea_rereg_mr_task;
 105 static DEFINE_MUTEX(dlpar_mem_lock);
 106 struct ehea_fw_handle_array ehea_fw_handles;
 107 struct ehea_bcmc_reg_array ehea_bcmc_regs;
 108
 109
 110 static int __devinit ehea_probe_adapter(struct of_device *dev,
 111                                         const struct of_device_id *id);
 112
 113 static int __devexit ehea_remove(struct of_device *dev);
 114
 115 static struct of_device_id ehea_device_table[] = {
 116         {
 117                 .name = "lhea",
 118                 .compatible = "IBM,lhea",
 119         },
 120         {},
 121 };
 122 MODULE_DEVICE_TABLE(of, ehea_device_table);
 123
 124 static struct of_platform_driver ehea_driver = {
 125         .name = "ehea",
 126         .match_table = ehea_device_table,
 127         .probe = ehea_probe_adapter,
 128         .remove = ehea_remove,
 129 };
 130
 131 void ehea_dump(void *adr, int len, char *msg)
 132 {
 133         int x;
 134         unsigned char *deb = adr;
 135         for (x = 0; x < len; x += 16) {
 136                 printk(DRV_NAME " %s adr=%p ofs=%04x %016llx %016llx\n", msg,
 137                           deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 138                 deb += 16;
 139         }
 140 }
 141
 142 void ehea_schedule_port_reset(struct ehea_port *port)
 143 {
 144         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 145                 schedule_work(&port->reset_task);
 146 }
 147
 148 static void ehea_update_firmware_handles(void)
 149 {
 150         struct ehea_fw_handle_entry *arr = NULL;
 151         struct ehea_adapter *adapter;
 152         int num_adapters = 0;
 153         int num_ports = 0;
 154         int num_portres = 0;
 155         int i = 0;
 156         int num_fw_handles, k, l;
 157
 158         /* Determine number of handles */
 159         mutex_lock(&ehea_fw_handles.lock);
 160
 161         list_for_each_entry(adapter, &adapter_list, list) {
 162                 num_adapters++;
 163
 164                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 165                         struct ehea_port *port = adapter->port[k];
 166
 167                         if (!port || (port->state != EHEA_PORT_UP))
 168                                 continue;
 169
 170                         num_ports++;
 171                         num_portres += port->num_def_qps + port->num_add_tx_qps;
 172                 }
 173         }
 174
 175         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 176                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 177                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 178
 179         if (num_fw_handles) {
 180                 arr = kzalloc(num_fw_handles * sizeof(*arr), GFP_KERNEL);
 181                 if (!arr)
 182                         goto out;  /* Keep the existing array */
 183         } else
 184                 goto out_update;
 185
 186         list_for_each_entry(adapter, &adapter_list, list) {
 187                 if (num_adapters == 0)
 188                         break;
 189
 190                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 191                         struct ehea_port *port = adapter->port[k];
 192
 193                         if (!port || (port->state != EHEA_PORT_UP) ||
 194                             (num_ports == 0))
 195                                 continue;
 196
 197                         for (l = 0;
 198                              l < port->num_def_qps + port->num_add_tx_qps;
 199                              l++) {
 200                                 struct ehea_port_res *pr = &port->port_res[l];
 201
 202                                 arr[i].adh = adapter->handle;
 203                                 arr[i++].fwh = pr->qp->fw_handle;
 204                                 arr[i].adh = adapter->handle;
 205                                 arr[i++].fwh = pr->send_cq->fw_handle;
 206                                 arr[i].adh = adapter->handle;
 207                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 208                                 arr[i].adh = adapter->handle;
 209                                 arr[i++].fwh = pr->eq->fw_handle;
 210                                 arr[i].adh = adapter->handle;
 211                                 arr[i++].fwh = pr->send_mr.handle;
 212                                 arr[i].adh = adapter->handle;
 213                                 arr[i++].fwh = pr->recv_mr.handle;
 214                         }
 215                         arr[i].adh = adapter->handle;
 216                         arr[i++].fwh = port->qp_eq->fw_handle;
 217                         num_ports--;
 218                 }
 219
 220                 arr[i].adh = adapter->handle;
 221                 arr[i++].fwh = adapter->neq->fw_handle;
 222
 223                 if (adapter->mr.handle) {
 224                         arr[i].adh = adapter->handle;
 225                         arr[i++].fwh = adapter->mr.handle;
 226                 }
 227                 num_adapters--;
 228         }
 229
 230 out_update:
 231         kfree(ehea_fw_handles.arr);
 232         ehea_fw_handles.arr = arr;
 233         ehea_fw_handles.num_entries = i;
 234 out:
 235         mutex_unlock(&ehea_fw_handles.lock);
 236 }
 237
 238 static void ehea_update_bcmc_registrations(void)
 239 {
 240         unsigned long flags;
 241         struct ehea_bcmc_reg_entry *arr = NULL;
 242         struct ehea_adapter *adapter;
 243         struct ehea_mc_list *mc_entry;
 244         int num_registrations = 0;
 245         int i = 0;
 246         int k;
 247
 248         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 249
 250         /* Determine number of registrations */
 251         list_for_each_entry(adapter, &adapter_list, list)
 252                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 253                         struct ehea_port *port = adapter->port[k];
 254
 255                         if (!port || (port->state != EHEA_PORT_UP))
 256                                 continue;
 257
 258                         num_registrations += 2; /* Broadcast registrations */
 259
 260                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 261                                 num_registrations += 2;
 262                 }
 263
 264         if (num_registrations) {
 265                 arr = kzalloc(num_registrations * sizeof(*arr), GFP_ATOMIC);
 266                 if (!arr)
 267                         goto out;  /* Keep the existing array */
 268         } else
 269                 goto out_update;
 270
 271         list_for_each_entry(adapter, &adapter_list, list) {
 272                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 273                         struct ehea_port *port = adapter->port[k];
 274
 275                         if (!port || (port->state != EHEA_PORT_UP))
 276                                 continue;
 277
 278                         if (num_registrations == 0)
 279                                 goto out_update;
 280
 281                         arr[i].adh = adapter->handle;
 282                         arr[i].port_id = port->logical_port_id;
 283                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 284                                           EHEA_BCMC_UNTAGGED;
 285                         arr[i++].macaddr = port->mac_addr;
 286
 287                         arr[i].adh = adapter->handle;
 288                         arr[i].port_id = port->logical_port_id;
 289                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 290                                           EHEA_BCMC_VLANID_ALL;
 291                         arr[i++].macaddr = port->mac_addr;
 292                         num_registrations -= 2;
 293
 294                         list_for_each_entry(mc_entry,
 295                                             &port->mc_list->list, list) {
 296                                 if (num_registrations == 0)
 297                                         goto out_update;
 298
 299                                 arr[i].adh = adapter->handle;
 300                                 arr[i].port_id = port->logical_port_id;
 301                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 302                                                   EHEA_BCMC_MULTICAST |
 303                                                   EHEA_BCMC_UNTAGGED;
 304                                 arr[i++].macaddr = mc_entry->macaddr;
 305
 306                                 arr[i].adh = adapter->handle;
 307                                 arr[i].port_id = port->logical_port_id;
 308                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 309                                                   EHEA_BCMC_MULTICAST |
 310                                                   EHEA_BCMC_VLANID_ALL;
 311                                 arr[i++].macaddr = mc_entry->macaddr;
 312                                 num_registrations -= 2;
 313                         }
 314                 }
 315         }
 316
 317 out_update:
 318         kfree(ehea_bcmc_regs.arr);
 319         ehea_bcmc_regs.arr = arr;
 320         ehea_bcmc_regs.num_entries = i;
 321 out:
 322         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 323 }
 324
 325 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 326 {
 327         struct ehea_port *port = netdev_priv(dev);
 328         struct net_device_stats *stats = &port->stats;
 329         struct hcp_ehea_port_cb2 *cb2;
 330         u64 hret, rx_packets, tx_packets;
 331         int i;
 332
 333         memset(stats, 0, sizeof(*stats));
 334
 335         cb2 = (void *)get_zeroed_page(GFP_ATOMIC);
 336         if (!cb2) {
 337                 ehea_error("no mem for cb2");
 338                 goto out;
 339         }
 340
 341         hret = ehea_h_query_ehea_port(port->adapter->handle,
 342                                       port->logical_port_id,
 343                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 344         if (hret != H_SUCCESS) {
 345                 ehea_error("query_ehea_port failed");
 346                 goto out_herr;
 347         }
 348
 349         if (netif_msg_hw(port))
 350                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 351
 352         rx_packets = 0;
 353         for (i = 0; i < port->num_def_qps; i++)
 354                 rx_packets += port->port_res[i].rx_packets;
 355
 356         tx_packets = 0;
 357         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
 358                 tx_packets += port->port_res[i].tx_packets;
 359
 360         stats->tx_packets = tx_packets;
 361         stats->multicast = cb2->rxmcp;
 362         stats->rx_errors = cb2->rxuerr;
 363         stats->rx_bytes = cb2->rxo;
 364         stats->tx_bytes = cb2->txo;
 365         stats->rx_packets = rx_packets;
 366
 367 out_herr:
 368         free_page((unsigned long)cb2);
 369 out:
 370         return stats;
 371 }
 372
 373 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 374 {
 375         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 376         struct net_device *dev = pr->port->netdev;
 377         int max_index_mask = pr->rq1_skba.len - 1;
 378         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 379         int adder = 0;
 380         int i;
 381
 382         pr->rq1_skba.os_skbs = 0;
 383
 384         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 385                 if (nr_of_wqes > 0)
 386                         pr->rq1_skba.index = index;
 387                 pr->rq1_skba.os_skbs = fill_wqes;
 388                 return;
 389         }
 390
 391         for (i = 0; i < fill_wqes; i++) {
 392                 if (!skb_arr_rq1[index]) {
 393                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 394                                                               EHEA_L_PKT_SIZE);
 395                         if (!skb_arr_rq1[index]) {
 396                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 397                                 break;
 398                         }
 399                 }
 400                 index--;
 401                 index &= max_index_mask;
 402                 adder++;
 403         }
 404
 405         if (adder == 0)
 406                 return;
 407
 408         /* Ring doorbell */
 409         ehea_update_rq1a(pr->qp, adder);
 410 }
 411
 412 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 413 {
 414         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 415         struct net_device *dev = pr->port->netdev;
 416         int i;
 417
 418         for (i = 0; i < pr->rq1_skba.len; i++) {
 419                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 420                 if (!skb_arr_rq1[i])
 421                         break;
 422         }
 423         /* Ring doorbell */
 424         ehea_update_rq1a(pr->qp, nr_rq1a);
 425 }
 426
 427 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 428                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 429                               int num_wqes, int wqe_type, int packet_size)
 430 {
 431         struct net_device *dev = pr->port->netdev;
 432         struct ehea_qp *qp = pr->qp;
 433         struct sk_buff **skb_arr = q_skba->arr;
 434         struct ehea_rwqe *rwqe;
 435         int i, index, max_index_mask, fill_wqes;
 436         int adder = 0;
 437         int ret = 0;
 438
 439         fill_wqes = q_skba->os_skbs + num_wqes;
 440         q_skba->os_skbs = 0;
 441
 442         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 443                 q_skba->os_skbs = fill_wqes;
 444                 return ret;
 445         }
 446
 447         index = q_skba->index;
 448         max_index_mask = q_skba->len - 1;
 449         for (i = 0; i < fill_wqes; i++) {
 450                 u64 tmp_addr;
 451                 struct sk_buff *skb;
 452
 453                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 454                 if (!skb) {
 455                         q_skba->os_skbs = fill_wqes - i;
 456                         if (q_skba->os_skbs == q_skba->len - 2) {
 457                                 ehea_info("%s: rq%i ran dry - no mem for skb",
 458                                           pr->port->netdev->name, rq_nr);
 459                                 ret = -ENOMEM;
 460                         }
 461                         break;
 462                 }
 463
 464                 skb_arr[index] = skb;
 465                 tmp_addr = ehea_map_vaddr(skb->data);
 466                 if (tmp_addr == -1) {
 467                         dev_kfree_skb(skb);
 468                         q_skba->os_skbs = fill_wqes - i;
 469                         ret = 0;
 470                         break;
 471                 }
 472
 473                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 474                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 475                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 476                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 477                 rwqe->sg_list[0].vaddr = tmp_addr;
 478                 rwqe->sg_list[0].len = packet_size;
 479                 rwqe->data_segments = 1;
 480
 481                 index++;
 482                 index &= max_index_mask;
 483                 adder++;
 484         }
 485
 486         q_skba->index = index;
 487         if (adder == 0)
 488                 goto out;
 489
 490         /* Ring doorbell */
 491         iosync();
 492         if (rq_nr == 2)
 493                 ehea_update_rq2a(pr->qp, adder);
 494         else
 495                 ehea_update_rq3a(pr->qp, adder);
 496 out:
 497         return ret;
 498 }
 499
 500
 501 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 502 {
 503         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 504                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 505                                   EHEA_RQ2_PKT_SIZE);
 506 }
 507
 508
 509 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 510 {
 511         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 512                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 513                                   EHEA_MAX_PACKET_SIZE);
 514 }
 515
 516 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 517 {
 518         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 519         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 520                 return 0;
 521         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 522             (cqe->header_length == 0))
 523                 return 0;
 524         return -EINVAL;
 525 }
 526
 527 static inline void ehea_fill_skb(struct net_device *dev,
 528                                  struct sk_buff *skb, struct ehea_cqe *cqe)
 529 {
 530         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 531
 532         skb_put(skb, length);
 533         skb->ip_summed = CHECKSUM_UNNECESSARY;
 534         skb->protocol = eth_type_trans(skb, dev);
 535 }
 536
 537 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 538                                                int arr_len,
 539                                                struct ehea_cqe *cqe)
 540 {
 541         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 542         struct sk_buff *skb;
 543         void *pref;
 544         int x;
 545
 546         x = skb_index + 1;
 547         x &= (arr_len - 1);
 548
 549         pref = skb_array[x];
 550         if (pref) {
 551                 prefetchw(pref);
 552                 prefetchw(pref + EHEA_CACHE_LINE);
 553
 554                 pref = (skb_array[x]->data);
 555                 prefetch(pref);
 556                 prefetch(pref + EHEA_CACHE_LINE);
 557                 prefetch(pref + EHEA_CACHE_LINE * 2);
 558                 prefetch(pref + EHEA_CACHE_LINE * 3);
 559         }
 560
 561         skb = skb_array[skb_index];
 562         skb_array[skb_index] = NULL;
 563         return skb;
 564 }
 565
 566 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 567                                                   int arr_len, int wqe_index)
 568 {
 569         struct sk_buff *skb;
 570         void *pref;
 571         int x;
 572
 573         x = wqe_index + 1;
 574         x &= (arr_len - 1);
 575
 576         pref = skb_array[x];
 577         if (pref) {
 578                 prefetchw(pref);
 579                 prefetchw(pref + EHEA_CACHE_LINE);
 580
 581                 pref = (skb_array[x]->data);
 582                 prefetchw(pref);
 583                 prefetchw(pref + EHEA_CACHE_LINE);
 584         }
 585
 586         skb = skb_array[wqe_index];
 587         skb_array[wqe_index] = NULL;
 588         return skb;
 589 }
 590
 591 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 592                                  struct ehea_cqe *cqe, int *processed_rq2,
 593                                  int *processed_rq3)
 594 {
 595         struct sk_buff *skb;
 596
 597         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 598                 pr->p_stats.err_tcp_cksum++;
 599         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 600                 pr->p_stats.err_ip_cksum++;
 601         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 602                 pr->p_stats.err_frame_crc++;
 603
 604         if (rq == 2) {
 605                 *processed_rq2 += 1;
 606                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 607                 dev_kfree_skb(skb);
 608         } else if (rq == 3) {
 609                 *processed_rq3 += 1;
 610                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 611                 dev_kfree_skb(skb);
 612         }
 613
 614         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 615                 if (netif_msg_rx_err(pr->port)) {
 616                         ehea_error("Critical receive error for QP %d. "
 617                                    "Resetting port.", pr->qp->init_attr.qp_nr);
 618                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 619                 }
 620                 ehea_schedule_port_reset(pr->port);
 621                 return 1;
 622         }
 623
 624         return 0;
 625 }
 626
 627 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 628                        void **tcph, u64 *hdr_flags, void *priv)
 629 {
 630         struct ehea_cqe *cqe = priv;
 631         unsigned int ip_len;
 632         struct iphdr *iph;
 633
 634         /* non tcp/udp packets */
 635         if (!cqe->header_length)
 636                 return -1;
 637
 638         /* non tcp packet */
 639         skb_reset_network_header(skb);
 640         iph = ip_hdr(skb);
 641         if (iph->protocol != IPPROTO_TCP)
 642                 return -1;
 643
 644         ip_len = ip_hdrlen(skb);
 645         skb_set_transport_header(skb, ip_len);
 646         *tcph = tcp_hdr(skb);
 647
 648         /* check if ip header and tcp header are complete */
 649         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 650                 return -1;
 651
 652         *hdr_flags = LRO_IPV4 | LRO_TCP;
 653         *iphdr = iph;
 654
 655         return 0;
 656 }
 657
 658 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 659                           struct sk_buff *skb)
 660 {
 661         int vlan_extracted = ((cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) &&
 662                               pr->port->vgrp);
 663
 664         if (use_lro) {
 665                 if (vlan_extracted)
 666                         lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
 667                                                      pr->port->vgrp,
 668                                                      cqe->vlan_tag,
 669                                                      cqe);
 670                 else
 671                         lro_receive_skb(&pr->lro_mgr, skb, cqe);
 672         } else {
 673                 if (vlan_extracted)
 674                         vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
 675                                                  cqe->vlan_tag);
 676                 else
 677                         netif_receive_skb(skb);
 678         }
 679 }
 680
 681 static int ehea_proc_rwqes(struct net_device *dev,
 682                            struct ehea_port_res *pr,
 683                            int budget)
 684 {
 685         struct ehea_port *port = pr->port;
 686         struct ehea_qp *qp = pr->qp;
 687         struct ehea_cqe *cqe;
 688         struct sk_buff *skb;
 689         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 690         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 691         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 692         int skb_arr_rq1_len = pr->rq1_skba.len;
 693         int skb_arr_rq2_len = pr->rq2_skba.len;
 694         int skb_arr_rq3_len = pr->rq3_skba.len;
 695         int processed, processed_rq1, processed_rq2, processed_rq3;
 696         int wqe_index, last_wqe_index, rq, port_reset;
 697
 698         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 699         last_wqe_index = 0;
 700
 701         cqe = ehea_poll_rq1(qp, &wqe_index);
 702         while ((processed < budget) && cqe) {
 703                 ehea_inc_rq1(qp);
 704                 processed_rq1++;
 705                 processed++;
 706                 if (netif_msg_rx_status(port))
 707                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 708
 709                 last_wqe_index = wqe_index;
 710                 rmb();
 711                 if (!ehea_check_cqe(cqe, &rq)) {
 712                         if (rq == 1) {
 713                                 /* LL RQ1 */
 714                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 715                                                           skb_arr_rq1_len,
 716                                                           wqe_index);
 717                                 if (unlikely(!skb)) {
 718                                         if (netif_msg_rx_err(port))
 719                                                 ehea_error("LL rq1: skb=NULL");
 720
 721                                         skb = netdev_alloc_skb(dev,
 722                                                                EHEA_L_PKT_SIZE);
 723                                         if (!skb)
 724                                                 break;
 725                                 }
 726                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 727                                                  cqe->num_bytes_transfered - 4);
 728                                 ehea_fill_skb(dev, skb, cqe);
 729                         } else if (rq == 2) {
 730                                 /* RQ2 */
 731                                 skb = get_skb_by_index(skb_arr_rq2,
 732                                                        skb_arr_rq2_len, cqe);
 733                                 if (unlikely(!skb)) {
 734                                         if (netif_msg_rx_err(port))
 735                                                 ehea_error("rq2: skb=NULL");
 736                                         break;
 737                                 }
 738                                 ehea_fill_skb(dev, skb, cqe);
 739                                 processed_rq2++;
 740                         } else {
 741                                 /* RQ3 */
 742                                 skb = get_skb_by_index(skb_arr_rq3,
 743                                                        skb_arr_rq3_len, cqe);
 744                                 if (unlikely(!skb)) {
 745                                         if (netif_msg_rx_err(port))
 746                                                 ehea_error("rq3: skb=NULL");
 747                                         break;
 748                                 }
 749                                 ehea_fill_skb(dev, skb, cqe);
 750                                 processed_rq3++;
 751                         }
 752
 753                         ehea_proc_skb(pr, cqe, skb);
 754                 } else {
 755                         pr->p_stats.poll_receive_errors++;
 756                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 757                                                            &processed_rq2,
 758                                                            &processed_rq3);
 759                         if (port_reset)
 760                                 break;
 761                 }
 762                 cqe = ehea_poll_rq1(qp, &wqe_index);
 763         }
 764         if (use_lro)
 765                 lro_flush_all(&pr->lro_mgr);
 766
 767         pr->rx_packets += processed;
 768
 769         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 770         ehea_refill_rq2(pr, processed_rq2);
 771         ehea_refill_rq3(pr, processed_rq3);
 772
 773         return processed;
 774 }
 775
 776 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 777 {
 778         struct sk_buff *skb;
 779         struct ehea_cq *send_cq = pr->send_cq;
 780         struct ehea_cqe *cqe;
 781         int quota = my_quota;
 782         int cqe_counter = 0;
 783         int swqe_av = 0;
 784         int index;
 785         unsigned long flags;
 786
 787         cqe = ehea_poll_cq(send_cq);
 788         while (cqe && (quota > 0)) {
 789                 ehea_inc_cq(send_cq);
 790
 791                 cqe_counter++;
 792                 rmb();
 793                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 794                         ehea_error("Bad send completion status=0x%04X",
 795                                    cqe->status);
 796
 797                         if (netif_msg_tx_err(pr->port))
 798                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 799
 800                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 801                                 ehea_error("Resetting port");
 802                                 ehea_schedule_port_reset(pr->port);
 803                                 break;
 804                         }
 805                 }
 806
 807                 if (netif_msg_tx_done(pr->port))
 808                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 809
 810                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 811                            == EHEA_SWQE2_TYPE)) {
 812
 813                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 814                         skb = pr->sq_skba.arr[index];
 815                         dev_kfree_skb(skb);
 816                         pr->sq_skba.arr[index] = NULL;
 817                 }
 818
 819                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 820                 quota--;
 821
 822                 cqe = ehea_poll_cq(send_cq);
 823         };
 824
 825         ehea_update_feca(send_cq, cqe_counter);
 826         atomic_add(swqe_av, &pr->swqe_avail);
 827
 828         spin_lock_irqsave(&pr->netif_queue, flags);
 829
 830         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 831                                   >= pr->swqe_refill_th)) {
 832                 netif_wake_queue(pr->port->netdev);
 833                 pr->queue_stopped = 0;
 834         }
 835         spin_unlock_irqrestore(&pr->netif_queue, flags);
 836
 837         return cqe;
 838 }
 839
 840 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 841 #define EHEA_POLL_MAX_CQES 65535
 842
 843 static int ehea_poll(struct napi_struct *napi, int budget)
 844 {
 845         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 846                                                 napi);
 847         struct net_device *dev = pr->port->netdev;
 848         struct ehea_cqe *cqe;
 849         struct ehea_cqe *cqe_skb = NULL;
 850         int force_irq, wqe_index;
 851         int rx = 0;
 852
 853         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 854         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 855
 856         if (!force_irq)
 857                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 858
 859         while ((rx != budget) || force_irq) {
 860                 pr->poll_counter = 0;
 861                 force_irq = 0;
 862                 napi_complete(napi);
 863                 ehea_reset_cq_ep(pr->recv_cq);
 864                 ehea_reset_cq_ep(pr->send_cq);
 865                 ehea_reset_cq_n1(pr->recv_cq);
 866                 ehea_reset_cq_n1(pr->send_cq);
 867                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 868                 cqe_skb = ehea_poll_cq(pr->send_cq);
 869
 870                 if (!cqe && !cqe_skb)
 871                         return rx;
 872
 873                 if (!napi_reschedule(napi))
 874                         return rx;
 875
 876                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 877                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 878         }
 879
 880         pr->poll_counter++;
 881         return rx;
 882 }
 883
 884 #ifdef CONFIG_NET_POLL_CONTROLLER
 885 static void ehea_netpoll(struct net_device *dev)
 886 {
 887         struct ehea_port *port = netdev_priv(dev);
 888         int i;
 889
 890         for (i = 0; i < port->num_def_qps; i++)
 891                 napi_schedule(&port->port_res[i].napi);
 892 }
 893 #endif
 894
 895 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 896 {
 897         struct ehea_port_res *pr = param;
 898
 899         napi_schedule(&pr->napi);
 900
 901         return IRQ_HANDLED;
 902 }
 903
 904 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 905 {
 906         struct ehea_port *port = param;
 907         struct ehea_eqe *eqe;
 908         struct ehea_qp *qp;
 909         u32 qp_token;
 910         u64 resource_type, aer, aerr;
 911         int reset_port = 0;
 912
 913         eqe = ehea_poll_eq(port->qp_eq);
 914
 915         while (eqe) {
 916                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 917                 ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
 918                            eqe->entry, qp_token);
 919
 920                 qp = port->port_res[qp_token].qp;
 921
 922                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 923                                                 &aer, &aerr);
 924
 925                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 926                         if ((aer & EHEA_AER_RESET_MASK) ||
 927                             (aerr & EHEA_AERR_RESET_MASK))
 928                                  reset_port = 1;
 929                 } else
 930                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 931
 932                 eqe = ehea_poll_eq(port->qp_eq);
 933         }
 934
 935         if (reset_port) {
 936                 ehea_error("Resetting port");
 937                 ehea_schedule_port_reset(port);
 938         }
 939
 940         return IRQ_HANDLED;
 941 }
 942
 943 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 944                                        int logical_port)
 945 {
 946         int i;
 947
 948         for (i = 0; i < EHEA_MAX_PORTS; i++)
 949                 if (adapter->port[i])
 950                         if (adapter->port[i]->logical_port_id == logical_port)
 951                                 return adapter->port[i];
 952         return NULL;
 953 }
 954
 955 int ehea_sense_port_attr(struct ehea_port *port)
 956 {
 957         int ret;
 958         u64 hret;
 959         struct hcp_ehea_port_cb0 *cb0;
 960
 961         /* may be called via ehea_neq_tasklet() */
 962         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 963         if (!cb0) {
 964                 ehea_error("no mem for cb0");
 965                 ret = -ENOMEM;
 966                 goto out;
 967         }
 968
 969         hret = ehea_h_query_ehea_port(port->adapter->handle,
 970                                       port->logical_port_id, H_PORT_CB0,
 971                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 972                                       cb0);
 973         if (hret != H_SUCCESS) {
 974                 ret = -EIO;
 975                 goto out_free;
 976         }
 977
 978         /* MAC address */
 979         port->mac_addr = cb0->port_mac_addr << 16;
 980
 981         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
 982                 ret = -EADDRNOTAVAIL;
 983                 goto out_free;
 984         }
 985
 986         /* Port speed */
 987         switch (cb0->port_speed) {
 988         case H_SPEED_10M_H:
 989                 port->port_speed = EHEA_SPEED_10M;
 990                 port->full_duplex = 0;
 991                 break;
 992         case H_SPEED_10M_F:
 993                 port->port_speed = EHEA_SPEED_10M;
 994                 port->full_duplex = 1;
 995                 break;
 996         case H_SPEED_100M_H:
 997                 port->port_speed = EHEA_SPEED_100M;
 998                 port->full_duplex = 0;
 999                 break;
1000         case H_SPEED_100M_F:
1001                 port->port_speed = EHEA_SPEED_100M;
1002                 port->full_duplex = 1;
1003                 break;
1004         case H_SPEED_1G_F:
1005                 port->port_speed = EHEA_SPEED_1G;
1006                 port->full_duplex = 1;
1007                 break;
1008         case H_SPEED_10G_F:
1009                 port->port_speed = EHEA_SPEED_10G;
1010                 port->full_duplex = 1;
1011                 break;
1012         default:
1013                 port->port_speed = 0;
1014                 port->full_duplex = 0;
1015                 break;
1016         }
1017
1018         port->autoneg = 1;
1019         port->num_mcs = cb0->num_default_qps;
1020
1021         /* Number of default QPs */
1022         if (use_mcs)
1023                 port->num_def_qps = cb0->num_default_qps;
1024         else
1025                 port->num_def_qps = 1;
1026
1027         if (!port->num_def_qps) {
1028                 ret = -EINVAL;
1029                 goto out_free;
1030         }
1031
1032         port->num_tx_qps = num_tx_qps;
1033
1034         if (port->num_def_qps >= port->num_tx_qps)
1035                 port->num_add_tx_qps = 0;
1036         else
1037                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1038
1039         ret = 0;
1040 out_free:
1041         if (ret || netif_msg_probe(port))
1042                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1043         free_page((unsigned long)cb0);
1044 out:
1045         return ret;
1046 }
1047
1048 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1049 {
1050         struct hcp_ehea_port_cb4 *cb4;
1051         u64 hret;
1052         int ret = 0;
1053
1054         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1055         if (!cb4) {
1056                 ehea_error("no mem for cb4");
1057                 ret = -ENOMEM;
1058                 goto out;
1059         }
1060
1061         cb4->port_speed = port_speed;
1062
1063         netif_carrier_off(port->netdev);
1064
1065         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1066                                        port->logical_port_id,
1067                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1068         if (hret == H_SUCCESS) {
1069                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1070
1071                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1072                                               port->logical_port_id,
1073                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1074                                               cb4);
1075                 if (hret == H_SUCCESS) {
1076                         switch (cb4->port_speed) {
1077                         case H_SPEED_10M_H:
1078                                 port->port_speed = EHEA_SPEED_10M;
1079                                 port->full_duplex = 0;
1080                                 break;
1081                         case H_SPEED_10M_F:
1082                                 port->port_speed = EHEA_SPEED_10M;
1083                                 port->full_duplex = 1;
1084                                 break;
1085                         case H_SPEED_100M_H:
1086                                 port->port_speed = EHEA_SPEED_100M;
1087                                 port->full_duplex = 0;
1088                                 break;
1089                         case H_SPEED_100M_F:
1090                                 port->port_speed = EHEA_SPEED_100M;
1091                                 port->full_duplex = 1;
1092                                 break;
1093                         case H_SPEED_1G_F:
1094                                 port->port_speed = EHEA_SPEED_1G;
1095                                 port->full_duplex = 1;
1096                                 break;
1097                         case H_SPEED_10G_F:
1098                                 port->port_speed = EHEA_SPEED_10G;
1099                                 port->full_duplex = 1;
1100                                 break;
1101                         default:
1102                                 port->port_speed = 0;
1103                                 port->full_duplex = 0;
1104                                 break;
1105                         }
1106                 } else {
1107                         ehea_error("Failed sensing port speed");
1108                         ret = -EIO;
1109                 }
1110         } else {
1111                 if (hret == H_AUTHORITY) {
1112                         ehea_info("Hypervisor denied setting port speed");
1113                         ret = -EPERM;
1114                 } else {
1115                         ret = -EIO;
1116                         ehea_error("Failed setting port speed");
1117                 }
1118         }
1119         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1120                 netif_carrier_on(port->netdev);
1121
1122         free_page((unsigned long)cb4);
1123 out:
1124         return ret;
1125 }
1126
1127 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1128 {
1129         int ret;
1130         u8 ec;
1131         u8 portnum;
1132         struct ehea_port *port;
1133
1134         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1135         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1136         port = ehea_get_port(adapter, portnum);
1137
1138         switch (ec) {
1139         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1140
1141                 if (!port) {
1142                         ehea_error("unknown portnum %x", portnum);
1143                         break;
1144                 }
1145
1146                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1147                         if (!netif_carrier_ok(port->netdev)) {
1148                                 ret = ehea_sense_port_attr(port);
1149                                 if (ret) {
1150                                         ehea_error("failed resensing port "
1151                                                    "attributes");
1152                                         break;
1153                                 }
1154
1155                                 if (netif_msg_link(port))
1156                                         ehea_info("%s: Logical port up: %dMbps "
1157                                                   "%s Duplex",
1158                                                   port->netdev->name,
1159                                                   port->port_speed,
1160                                                   port->full_duplex ==
1161                                                   1 ? "Full" : "Half");
1162
1163                                 netif_carrier_on(port->netdev);
1164                                 netif_wake_queue(port->netdev);
1165                         }
1166                 } else
1167                         if (netif_carrier_ok(port->netdev)) {
1168                                 if (netif_msg_link(port))
1169                                         ehea_info("%s: Logical port down",
1170                                                   port->netdev->name);
1171                                 netif_carrier_off(port->netdev);
1172                                 netif_stop_queue(port->netdev);
1173                         }
1174
1175                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1176                         port->phy_link = EHEA_PHY_LINK_UP;
1177                         if (netif_msg_link(port))
1178                                 ehea_info("%s: Physical port up",
1179                                           port->netdev->name);
1180                         if (prop_carrier_state)
1181                                 netif_carrier_on(port->netdev);
1182                 } else {
1183                         port->phy_link = EHEA_PHY_LINK_DOWN;
1184                         if (netif_msg_link(port))
1185                                 ehea_info("%s: Physical port down",
1186                                           port->netdev->name);
1187                         if (prop_carrier_state)
1188                                 netif_carrier_off(port->netdev);
1189                 }
1190
1191                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1192                         ehea_info("External switch port is primary port");
1193                 else
1194                         ehea_info("External switch port is backup port");
1195
1196                 break;
1197         case EHEA_EC_ADAPTER_MALFUNC:
1198                 ehea_error("Adapter malfunction");
1199                 break;
1200         case EHEA_EC_PORT_MALFUNC:
1201                 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1202                 netif_carrier_off(port->netdev);
1203                 netif_stop_queue(port->netdev);
1204                 break;
1205         default:
1206                 ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
1207                 break;
1208         }
1209 }
1210
1211 static void ehea_neq_tasklet(unsigned long data)
1212 {
1213         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1214         struct ehea_eqe *eqe;
1215         u64 event_mask;
1216
1217         eqe = ehea_poll_eq(adapter->neq);
1218         ehea_debug("eqe=%p", eqe);
1219
1220         while (eqe) {
1221                 ehea_debug("*eqe=%lx", eqe->entry);
1222                 ehea_parse_eqe(adapter, eqe->entry);
1223                 eqe = ehea_poll_eq(adapter->neq);
1224                 ehea_debug("next eqe=%p", eqe);
1225         }
1226
1227         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1228                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1229                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1230
1231         ehea_h_reset_events(adapter->handle,
1232                             adapter->neq->fw_handle, event_mask);
1233 }
1234
1235 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1236 {
1237         struct ehea_adapter *adapter = param;
1238         tasklet_hi_schedule(&adapter->neq_tasklet);
1239         return IRQ_HANDLED;
1240 }
1241
1242
1243 static int ehea_fill_port_res(struct ehea_port_res *pr)
1244 {
1245         int ret;
1246         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1247
1248         ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1249                                - init_attr->act_nr_rwqes_rq2
1250                                - init_attr->act_nr_rwqes_rq3 - 1);
1251
1252         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1253
1254         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1255
1256         return ret;
1257 }
1258
1259 static int ehea_reg_interrupts(struct net_device *dev)
1260 {
1261         struct ehea_port *port = netdev_priv(dev);
1262         struct ehea_port_res *pr;
1263         int i, ret;
1264
1265
1266         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1267                  dev->name);
1268
1269         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1270                                   ehea_qp_aff_irq_handler,
1271                                   IRQF_DISABLED, port->int_aff_name, port);
1272         if (ret) {
1273                 ehea_error("failed registering irq for qp_aff_irq_handler:"
1274                            "ist=%X", port->qp_eq->attr.ist1);
1275                 goto out_free_qpeq;
1276         }
1277
1278         if (netif_msg_ifup(port))
1279                 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1280                           "registered", port->qp_eq->attr.ist1);
1281
1282
1283         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1284                 pr = &port->port_res[i];
1285                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1286                          "%s-queue%d", dev->name, i);
1287                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1288                                           ehea_recv_irq_handler,
1289                                           IRQF_DISABLED, pr->int_send_name,
1290                                           pr);
1291                 if (ret) {
1292                         ehea_error("failed registering irq for ehea_queue "
1293                                    "port_res_nr:%d, ist=%X", i,
1294                                    pr->eq->attr.ist1);
1295                         goto out_free_req;
1296                 }
1297                 if (netif_msg_ifup(port))
1298                         ehea_info("irq_handle 0x%X for function ehea_queue_int "
1299                                   "%d registered", pr->eq->attr.ist1, i);
1300         }
1301 out:
1302         return ret;
1303
1304
1305 out_free_req:
1306         while (--i >= 0) {
1307                 u32 ist = port->port_res[i].eq->attr.ist1;
1308                 ibmebus_free_irq(ist, &port->port_res[i]);
1309         }
1310
1311 out_free_qpeq:
1312         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1313         i = port->num_def_qps;
1314
1315         goto out;
1316
1317 }
1318
1319 static void ehea_free_interrupts(struct net_device *dev)
1320 {
1321         struct ehea_port *port = netdev_priv(dev);
1322         struct ehea_port_res *pr;
1323         int i;
1324
1325         /* send */
1326
1327         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1328                 pr = &port->port_res[i];
1329                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1330                 if (netif_msg_intr(port))
1331                         ehea_info("free send irq for res %d with handle 0x%X",
1332                                   i, pr->eq->attr.ist1);
1333         }
1334
1335         /* associated events */
1336         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1337         if (netif_msg_intr(port))
1338                 ehea_info("associated event interrupt for handle 0x%X freed",
1339                           port->qp_eq->attr.ist1);
1340 }
1341
1342 static int ehea_configure_port(struct ehea_port *port)
1343 {
1344         int ret, i;
1345         u64 hret, mask;
1346         struct hcp_ehea_port_cb0 *cb0;
1347
1348         ret = -ENOMEM;
1349         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1350         if (!cb0)
1351                 goto out;
1352
1353         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1354                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1355                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1356                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1357                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1358                                       PXLY_RC_VLAN_FILTER)
1359                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1360
1361         for (i = 0; i < port->num_mcs; i++)
1362                 if (use_mcs)
1363                         cb0->default_qpn_arr[i] =
1364                                 port->port_res[i].qp->init_attr.qp_nr;
1365                 else
1366                         cb0->default_qpn_arr[i] =
1367                                 port->port_res[0].qp->init_attr.qp_nr;
1368
1369         if (netif_msg_ifup(port))
1370                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1371
1372         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1373              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1374
1375         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1376                                        port->logical_port_id,
1377                                        H_PORT_CB0, mask, cb0);
1378         ret = -EIO;
1379         if (hret != H_SUCCESS)
1380                 goto out_free;
1381
1382         ret = 0;
1383
1384 out_free:
1385         free_page((unsigned long)cb0);
1386 out:
1387         return ret;
1388 }
1389
1390 int ehea_gen_smrs(struct ehea_port_res *pr)
1391 {
1392         int ret;
1393         struct ehea_adapter *adapter = pr->port->adapter;
1394
1395         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1396         if (ret)
1397                 goto out;
1398
1399         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1400         if (ret)
1401                 goto out_free;
1402
1403         return 0;
1404
1405 out_free:
1406         ehea_rem_mr(&pr->send_mr);
1407 out:
1408         ehea_error("Generating SMRS failed\n");
1409         return -EIO;
1410 }
1411
1412 int ehea_rem_smrs(struct ehea_port_res *pr)
1413 {
1414         if ((ehea_rem_mr(&pr->send_mr)) ||
1415             (ehea_rem_mr(&pr->recv_mr)))
1416                 return -EIO;
1417         else
1418                 return 0;
1419 }
1420
1421 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1422 {
1423         int arr_size = sizeof(void *) * max_q_entries;
1424
1425         q_skba->arr = vmalloc(arr_size);
1426         if (!q_skba->arr)
1427                 return -ENOMEM;
1428
1429         memset(q_skba->arr, 0, arr_size);
1430
1431         q_skba->len = max_q_entries;
1432         q_skba->index = 0;
1433         q_skba->os_skbs = 0;
1434
1435         return 0;
1436 }
1437
1438 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1439                               struct port_res_cfg *pr_cfg, int queue_token)
1440 {
1441         struct ehea_adapter *adapter = port->adapter;
1442         enum ehea_eq_type eq_type = EHEA_EQ;
1443         struct ehea_qp_init_attr *init_attr = NULL;
1444         int ret = -EIO;
1445
1446         memset(pr, 0, sizeof(struct ehea_port_res));
1447
1448         pr->port = port;
1449         spin_lock_init(&pr->xmit_lock);
1450         spin_lock_init(&pr->netif_queue);
1451
1452         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1453         if (!pr->eq) {
1454                 ehea_error("create_eq failed (eq)");
1455                 goto out_free;
1456         }
1457
1458         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1459                                      pr->eq->fw_handle,
1460                                      port->logical_port_id);
1461         if (!pr->recv_cq) {
1462                 ehea_error("create_cq failed (cq_recv)");
1463                 goto out_free;
1464         }
1465
1466         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1467                                      pr->eq->fw_handle,
1468                                      port->logical_port_id);
1469         if (!pr->send_cq) {
1470                 ehea_error("create_cq failed (cq_send)");
1471                 goto out_free;
1472         }
1473
1474         if (netif_msg_ifup(port))
1475                 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1476                           pr->send_cq->attr.act_nr_of_cqes,
1477                           pr->recv_cq->attr.act_nr_of_cqes);
1478
1479         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1480         if (!init_attr) {
1481                 ret = -ENOMEM;
1482                 ehea_error("no mem for ehea_qp_init_attr");
1483                 goto out_free;
1484         }
1485
1486         init_attr->low_lat_rq1 = 1;
1487         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1488         init_attr->rq_count = 3;
1489         init_attr->qp_token = queue_token;
1490         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1491         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1492         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1493         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1494         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1495         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1496         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1497         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1498         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1499         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1500         init_attr->port_nr = port->logical_port_id;
1501         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1502         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1503         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1504
1505         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1506         if (!pr->qp) {
1507                 ehea_error("create_qp failed");
1508                 ret = -EIO;
1509                 goto out_free;
1510         }
1511
1512         if (netif_msg_ifup(port))
1513                 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1514                           "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1515                           init_attr->act_nr_send_wqes,
1516                           init_attr->act_nr_rwqes_rq1,
1517                           init_attr->act_nr_rwqes_rq2,
1518                           init_attr->act_nr_rwqes_rq3);
1519
1520         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1521
1522         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1523         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1524         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1525         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1526         if (ret)
1527                 goto out_free;
1528
1529         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1530         if (ehea_gen_smrs(pr) != 0) {
1531                 ret = -EIO;
1532                 goto out_free;
1533         }
1534
1535         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1536
1537         kfree(init_attr);
1538
1539         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1540
1541         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1542         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1543         pr->lro_mgr.lro_arr = pr->lro_desc;
1544         pr->lro_mgr.get_skb_header = get_skb_hdr;
1545         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1546         pr->lro_mgr.dev = port->netdev;
1547         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1548         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1549
1550         ret = 0;
1551         goto out;
1552
1553 out_free:
1554         kfree(init_attr);
1555         vfree(pr->sq_skba.arr);
1556         vfree(pr->rq1_skba.arr);
1557         vfree(pr->rq2_skba.arr);
1558         vfree(pr->rq3_skba.arr);
1559         ehea_destroy_qp(pr->qp);
1560         ehea_destroy_cq(pr->send_cq);
1561         ehea_destroy_cq(pr->recv_cq);
1562         ehea_destroy_eq(pr->eq);
1563 out:
1564         return ret;
1565 }
1566
1567 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1568 {
1569         int ret, i;
1570
1571         if (pr->qp)
1572                 netif_napi_del(&pr->napi);
1573
1574         ret = ehea_destroy_qp(pr->qp);
1575
1576         if (!ret) {
1577                 ehea_destroy_cq(pr->send_cq);
1578                 ehea_destroy_cq(pr->recv_cq);
1579                 ehea_destroy_eq(pr->eq);
1580
1581                 for (i = 0; i < pr->rq1_skba.len; i++)
1582                         if (pr->rq1_skba.arr[i])
1583                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1584
1585                 for (i = 0; i < pr->rq2_skba.len; i++)
1586                         if (pr->rq2_skba.arr[i])
1587                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1588
1589                 for (i = 0; i < pr->rq3_skba.len; i++)
1590                         if (pr->rq3_skba.arr[i])
1591                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1592
1593                 for (i = 0; i < pr->sq_skba.len; i++)
1594                         if (pr->sq_skba.arr[i])
1595                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1596
1597                 vfree(pr->rq1_skba.arr);
1598                 vfree(pr->rq2_skba.arr);
1599                 vfree(pr->rq3_skba.arr);
1600                 vfree(pr->sq_skba.arr);
1601                 ret = ehea_rem_smrs(pr);
1602         }
1603         return ret;
1604 }
1605
1606 /*
1607  * The write_* functions store information in swqe which is used by
1608  * the hardware to calculate the ip/tcp/udp checksum
1609  */
1610
1611 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1612                                       const struct sk_buff *skb)
1613 {
1614         swqe->ip_start = skb_network_offset(skb);
1615         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1616 }
1617
1618 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1619                                         const struct sk_buff *skb)
1620 {
1621         swqe->tcp_offset =
1622                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1623
1624         swqe->tcp_end = (u16)skb->len - 1;
1625 }
1626
1627 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1628                                         const struct sk_buff *skb)
1629 {
1630         swqe->tcp_offset =
1631                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1632
1633         swqe->tcp_end = (u16)skb->len - 1;
1634 }
1635
1636
1637 static void write_swqe2_TSO(struct sk_buff *skb,
1638                             struct ehea_swqe *swqe, u32 lkey)
1639 {
1640         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1641         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1642         int skb_data_size = skb_headlen(skb);
1643         int headersize;
1644
1645         /* Packet is TCP with TSO enabled */
1646         swqe->tx_control |= EHEA_SWQE_TSO;
1647         swqe->mss = skb_shinfo(skb)->gso_size;
1648         /* copy only eth/ip/tcp headers to immediate data and
1649          * the rest of skb->data to sg1entry
1650          */
1651         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1652
1653         skb_data_size = skb_headlen(skb);
1654
1655         if (skb_data_size >= headersize) {
1656                 /* copy immediate data */
1657                 skb_copy_from_linear_data(skb, imm_data, headersize);
1658                 swqe->immediate_data_length = headersize;
1659
1660                 if (skb_data_size > headersize) {
1661                         /* set sg1entry data */
1662                         sg1entry->l_key = lkey;
1663                         sg1entry->len = skb_data_size - headersize;
1664                         sg1entry->vaddr =
1665                                 ehea_map_vaddr(skb->data + headersize);
1666                         swqe->descriptors++;
1667                 }
1668         } else
1669                 ehea_error("cannot handle fragmented headers");
1670 }
1671
1672 static void write_swqe2_nonTSO(struct sk_buff *skb,
1673                                struct ehea_swqe *swqe, u32 lkey)
1674 {
1675         int skb_data_size = skb_headlen(skb);
1676         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1677         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1678
1679         /* Packet is any nonTSO type
1680          *
1681          * Copy as much as possible skb->data to immediate data and
1682          * the rest to sg1entry
1683          */
1684         if (skb_data_size >= SWQE2_MAX_IMM) {
1685                 /* copy immediate data */
1686                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1687
1688                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1689
1690                 if (skb_data_size > SWQE2_MAX_IMM) {
1691                         /* copy sg1entry data */
1692                         sg1entry->l_key = lkey;
1693                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1694                         sg1entry->vaddr =
1695                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1696                         swqe->descriptors++;
1697                 }
1698         } else {
1699                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1700                 swqe->immediate_data_length = skb_data_size;
1701         }
1702 }
1703
1704 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1705                                     struct ehea_swqe *swqe, u32 lkey)
1706 {
1707         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1708         skb_frag_t *frag;
1709         int nfrags, sg1entry_contains_frag_data, i;
1710
1711         nfrags = skb_shinfo(skb)->nr_frags;
1712         sg1entry = &swqe->u.immdata_desc.sg_entry;
1713         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1714         swqe->descriptors = 0;
1715         sg1entry_contains_frag_data = 0;
1716
1717         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1718                 write_swqe2_TSO(skb, swqe, lkey);
1719         else
1720                 write_swqe2_nonTSO(skb, swqe, lkey);
1721
1722         /* write descriptors */
1723         if (nfrags > 0) {
1724                 if (swqe->descriptors == 0) {
1725                         /* sg1entry not yet used */
1726                         frag = &skb_shinfo(skb)->frags[0];
1727
1728                         /* copy sg1entry data */
1729                         sg1entry->l_key = lkey;
1730                         sg1entry->len = frag->size;
1731                         sg1entry->vaddr =
1732                                 ehea_map_vaddr(page_address(frag->page)
1733                                                + frag->page_offset);
1734                         swqe->descriptors++;
1735                         sg1entry_contains_frag_data = 1;
1736                 }
1737
1738                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1739
1740                         frag = &skb_shinfo(skb)->frags[i];
1741                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1742
1743                         sgentry->l_key = lkey;
1744                         sgentry->len = frag->size;
1745                         sgentry->vaddr =
1746                                 ehea_map_vaddr(page_address(frag->page)
1747                                                + frag->page_offset);
1748                         swqe->descriptors++;
1749                 }
1750         }
1751 }
1752
1753 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1754 {
1755         int ret = 0;
1756         u64 hret;
1757         u8 reg_type;
1758
1759         /* De/Register untagged packets */
1760         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1761         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1762                                      port->logical_port_id,
1763                                      reg_type, port->mac_addr, 0, hcallid);
1764         if (hret != H_SUCCESS) {
1765                 ehea_error("%sregistering bc address failed (tagged)",
1766                            hcallid == H_REG_BCMC ? "" : "de");
1767                 ret = -EIO;
1768                 goto out_herr;
1769         }
1770
1771         /* De/Register VLAN packets */
1772         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1773         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1774                                      port->logical_port_id,
1775                                      reg_type, port->mac_addr, 0, hcallid);
1776         if (hret != H_SUCCESS) {
1777                 ehea_error("%sregistering bc address failed (vlan)",
1778                            hcallid == H_REG_BCMC ? "" : "de");
1779                 ret = -EIO;
1780         }
1781 out_herr:
1782         return ret;
1783 }
1784
1785 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1786 {
1787         struct ehea_port *port = netdev_priv(dev);
1788         struct sockaddr *mac_addr = sa;
1789         struct hcp_ehea_port_cb0 *cb0;
1790         int ret;
1791         u64 hret;
1792
1793         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1794                 ret = -EADDRNOTAVAIL;
1795                 goto out;
1796         }
1797
1798         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1799         if (!cb0) {
1800                 ehea_error("no mem for cb0");
1801                 ret = -ENOMEM;
1802                 goto out;
1803         }
1804
1805         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1806
1807         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1808
1809         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1810                                        port->logical_port_id, H_PORT_CB0,
1811                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1812         if (hret != H_SUCCESS) {
1813                 ret = -EIO;
1814                 goto out_free;
1815         }
1816
1817         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1818
1819         /* Deregister old MAC in pHYP */
1820         if (port->state == EHEA_PORT_UP) {
1821                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1822                 if (ret)
1823                         goto out_upregs;
1824         }
1825
1826         port->mac_addr = cb0->port_mac_addr << 16;
1827
1828         /* Register new MAC in pHYP */
1829         if (port->state == EHEA_PORT_UP) {
1830                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1831                 if (ret)
1832                         goto out_upregs;
1833         }
1834
1835         ret = 0;
1836
1837 out_upregs:
1838         ehea_update_bcmc_registrations();
1839 out_free:
1840         free_page((unsigned long)cb0);
1841 out:
1842         return ret;
1843 }
1844
1845 static void ehea_promiscuous_error(u64 hret, int enable)
1846 {
1847         if (hret == H_AUTHORITY)
1848                 ehea_info("Hypervisor denied %sabling promiscuous mode",
1849                           enable == 1 ? "en" : "dis");
1850         else
1851                 ehea_error("failed %sabling promiscuous mode",
1852                            enable == 1 ? "en" : "dis");
1853 }
1854
1855 static void ehea_promiscuous(struct net_device *dev, int enable)
1856 {
1857         struct ehea_port *port = netdev_priv(dev);
1858         struct hcp_ehea_port_cb7 *cb7;
1859         u64 hret;
1860
1861         if ((enable && port->promisc) || (!enable && !port->promisc))
1862                 return;
1863
1864         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1865         if (!cb7) {
1866                 ehea_error("no mem for cb7");
1867                 goto out;
1868         }
1869
1870         /* Modify Pxs_DUCQPN in CB7 */
1871         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1872
1873         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1874                                        port->logical_port_id,
1875                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1876         if (hret) {
1877                 ehea_promiscuous_error(hret, enable);
1878                 goto out;
1879         }
1880
1881         port->promisc = enable;
1882 out:
1883         free_page((unsigned long)cb7);
1884         return;
1885 }
1886
1887 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1888                                      u32 hcallid)
1889 {
1890         u64 hret;
1891         u8 reg_type;
1892
1893         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1894                  | EHEA_BCMC_UNTAGGED;
1895
1896         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1897                                      port->logical_port_id,
1898                                      reg_type, mc_mac_addr, 0, hcallid);
1899         if (hret)
1900                 goto out;
1901
1902         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1903                  | EHEA_BCMC_VLANID_ALL;
1904
1905         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1906                                      port->logical_port_id,
1907                                      reg_type, mc_mac_addr, 0, hcallid);
1908 out:
1909         return hret;
1910 }
1911
1912 static int ehea_drop_multicast_list(struct net_device *dev)
1913 {
1914         struct ehea_port *port = netdev_priv(dev);
1915         struct ehea_mc_list *mc_entry = port->mc_list;
1916         struct list_head *pos;
1917         struct list_head *temp;
1918         int ret = 0;
1919         u64 hret;
1920
1921         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1922                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1923
1924                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1925                                                  H_DEREG_BCMC);
1926                 if (hret) {
1927                         ehea_error("failed deregistering mcast MAC");
1928                         ret = -EIO;
1929                 }
1930
1931                 list_del(pos);
1932                 kfree(mc_entry);
1933         }
1934         return ret;
1935 }
1936
1937 static void ehea_allmulti(struct net_device *dev, int enable)
1938 {
1939         struct ehea_port *port = netdev_priv(dev);
1940         u64 hret;
1941
1942         if (!port->allmulti) {
1943                 if (enable) {
1944                         /* Enable ALLMULTI */
1945                         ehea_drop_multicast_list(dev);
1946                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1947                         if (!hret)
1948                                 port->allmulti = 1;
1949                         else
1950                                 ehea_error("failed enabling IFF_ALLMULTI");
1951                 }
1952         } else
1953                 if (!enable) {
1954                         /* Disable ALLMULTI */
1955                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1956                         if (!hret)
1957                                 port->allmulti = 0;
1958                         else
1959                                 ehea_error("failed disabling IFF_ALLMULTI");
1960                 }
1961 }
1962
1963 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1964 {
1965         struct ehea_mc_list *ehea_mcl_entry;
1966         u64 hret;
1967
1968         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1969         if (!ehea_mcl_entry) {
1970                 ehea_error("no mem for mcl_entry");
1971                 return;
1972         }
1973
1974         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1975
1976         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1977
1978         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1979                                          H_REG_BCMC);
1980         if (!hret)
1981                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1982         else {
1983                 ehea_error("failed registering mcast MAC");
1984                 kfree(ehea_mcl_entry);
1985         }
1986 }
1987
1988 static void ehea_set_multicast_list(struct net_device *dev)
1989 {
1990         struct ehea_port *port = netdev_priv(dev);
1991         struct netdev_hw_addr *ha;
1992         int ret;
1993
1994         if (dev->flags & IFF_PROMISC) {
1995                 ehea_promiscuous(dev, 1);
1996                 return;
1997         }
1998         ehea_promiscuous(dev, 0);
1999
2000         if (dev->flags & IFF_ALLMULTI) {
2001                 ehea_allmulti(dev, 1);
2002                 goto out;
2003         }
2004         ehea_allmulti(dev, 0);
2005
2006         if (!netdev_mc_empty(dev)) {
2007                 ret = ehea_drop_multicast_list(dev);
2008                 if (ret) {
2009                         /* Dropping the current multicast list failed.
2010                          * Enabling ALL_MULTI is the best we can do.
2011                          */
2012                         ehea_allmulti(dev, 1);
2013                 }
2014
2015                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2016                         ehea_info("Mcast registration limit reached (0x%llx). "
2017                                   "Use ALLMULTI!",
2018                                   port->adapter->max_mc_mac);
2019                         goto out;
2020                 }
2021
2022                 netdev_for_each_mc_addr(ha, dev)
2023                         ehea_add_multicast_entry(port, ha->addr);
2024
2025         }
2026 out:
2027         ehea_update_bcmc_registrations();
2028         return;
2029 }
2030
2031 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2032 {
2033         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2034                 return -EINVAL;
2035         dev->mtu = new_mtu;
2036         return 0;
2037 }
2038
2039 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2040                        struct ehea_swqe *swqe, u32 lkey)
2041 {
2042         if (skb->protocol == htons(ETH_P_IP)) {
2043                 const struct iphdr *iph = ip_hdr(skb);
2044
2045                 /* IPv4 */
2046                 swqe->tx_control |= EHEA_SWQE_CRC
2047                                  | EHEA_SWQE_IP_CHECKSUM
2048                                  | EHEA_SWQE_TCP_CHECKSUM
2049                                  | EHEA_SWQE_IMM_DATA_PRESENT
2050                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2051
2052                 write_ip_start_end(swqe, skb);
2053
2054                 if (iph->protocol == IPPROTO_UDP) {
2055                         if ((iph->frag_off & IP_MF) ||
2056                             (iph->frag_off & IP_OFFSET))
2057                                 /* IP fragment, so don't change cs */
2058                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2059                         else
2060                                 write_udp_offset_end(swqe, skb);
2061                 } else if (iph->protocol == IPPROTO_TCP) {
2062                         write_tcp_offset_end(swqe, skb);
2063                 }
2064
2065                 /* icmp (big data) and ip segmentation packets (all other ip
2066                    packets) do not require any special handling */
2067
2068         } else {
2069                 /* Other Ethernet Protocol */
2070                 swqe->tx_control |= EHEA_SWQE_CRC
2071                                  | EHEA_SWQE_IMM_DATA_PRESENT
2072                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2073         }
2074
2075         write_swqe2_data(skb, dev, swqe, lkey);
2076 }
2077
2078 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2079                        struct ehea_swqe *swqe)
2080 {
2081         int nfrags = skb_shinfo(skb)->nr_frags;
2082         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2083         skb_frag_t *frag;
2084         int i;
2085
2086         if (skb->protocol == htons(ETH_P_IP)) {
2087                 const struct iphdr *iph = ip_hdr(skb);
2088
2089                 /* IPv4 */
2090                 write_ip_start_end(swqe, skb);
2091
2092                 if (iph->protocol == IPPROTO_TCP) {
2093                         swqe->tx_control |= EHEA_SWQE_CRC
2094                                          | EHEA_SWQE_IP_CHECKSUM
2095                                          | EHEA_SWQE_TCP_CHECKSUM
2096                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2097
2098                         write_tcp_offset_end(swqe, skb);
2099
2100                 } else if (iph->protocol == IPPROTO_UDP) {
2101                         if ((iph->frag_off & IP_MF) ||
2102                             (iph->frag_off & IP_OFFSET))
2103                                 /* IP fragment, so don't change cs */
2104                                 swqe->tx_control |= EHEA_SWQE_CRC
2105                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2106                         else {
2107                                 swqe->tx_control |= EHEA_SWQE_CRC
2108                                                  | EHEA_SWQE_IP_CHECKSUM
2109                                                  | EHEA_SWQE_TCP_CHECKSUM
2110                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2111
2112                                 write_udp_offset_end(swqe, skb);
2113                         }
2114                 } else {
2115                         /* icmp (big data) and
2116                            ip segmentation packets (all other ip packets) */
2117                         swqe->tx_control |= EHEA_SWQE_CRC
2118                                          | EHEA_SWQE_IP_CHECKSUM
2119                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2120                 }
2121         } else {
2122                 /* Other Ethernet Protocol */
2123                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2124         }
2125         /* copy (immediate) data */
2126         if (nfrags == 0) {
2127                 /* data is in a single piece */
2128                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2129         } else {
2130                 /* first copy data from the skb->data buffer ... */
2131                 skb_copy_from_linear_data(skb, imm_data,
2132                                           skb_headlen(skb));
2133                 imm_data += skb_headlen(skb);
2134
2135                 /* ... then copy data from the fragments */
2136                 for (i = 0; i < nfrags; i++) {
2137                         frag = &skb_shinfo(skb)->frags[i];
2138                         memcpy(imm_data,
2139                                page_address(frag->page) + frag->page_offset,
2140                                frag->size);
2141                         imm_data += frag->size;
2142                 }
2143         }
2144         swqe->immediate_data_length = skb->len;
2145         dev_kfree_skb(skb);
2146 }
2147
2148 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2149 {
2150         struct tcphdr *tcp;
2151         u32 tmp;
2152
2153         if ((skb->protocol == htons(ETH_P_IP)) &&
2154             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2155                 tcp = (struct tcphdr *)(skb_network_header(skb) +
2156                                         (ip_hdr(skb)->ihl * 4));
2157                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2158                 tmp += ip_hdr(skb)->daddr % 31;
2159                 return tmp % num_qps;
2160         } else
2161                 return 0;
2162 }
2163
2164 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2165 {
2166         struct ehea_port *port = netdev_priv(dev);
2167         struct ehea_swqe *swqe;
2168         unsigned long flags;
2169         u32 lkey;
2170         int swqe_index;
2171         struct ehea_port_res *pr;
2172
2173         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2174
2175         if (!spin_trylock(&pr->xmit_lock))
2176                 return NETDEV_TX_BUSY;
2177
2178         if (pr->queue_stopped) {
2179                 spin_unlock(&pr->xmit_lock);
2180                 return NETDEV_TX_BUSY;
2181         }
2182
2183         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2184         memset(swqe, 0, SWQE_HEADER_SIZE);
2185         atomic_dec(&pr->swqe_avail);
2186
2187         if (skb->len <= SWQE3_MAX_IMM) {
2188                 u32 sig_iv = port->sig_comp_iv;
2189                 u32 swqe_num = pr->swqe_id_counter;
2190                 ehea_xmit3(skb, dev, swqe);
2191                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2192                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2193                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2194                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2195                                                       sig_iv);
2196                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2197                         pr->swqe_ll_count = 0;
2198                 } else
2199                         pr->swqe_ll_count += 1;
2200         } else {
2201                 swqe->wr_id =
2202                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2203                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2204                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2205                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2206                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2207
2208                 pr->sq_skba.index++;
2209                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2210
2211                 lkey = pr->send_mr.lkey;
2212                 ehea_xmit2(skb, dev, swqe, lkey);
2213                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2214         }
2215         pr->swqe_id_counter += 1;
2216
2217         if (port->vgrp && vlan_tx_tag_present(skb)) {
2218                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2219                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2220         }
2221
2222         if (netif_msg_tx_queued(port)) {
2223                 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2224                 ehea_dump(swqe, 512, "swqe");
2225         }
2226
2227         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2228                 netif_stop_queue(dev);
2229                 swqe->tx_control |= EHEA_SWQE_PURGE;
2230         }
2231
2232         ehea_post_swqe(pr->qp, swqe);
2233         pr->tx_packets++;
2234
2235         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2236                 spin_lock_irqsave(&pr->netif_queue, flags);
2237                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2238                         pr->p_stats.queue_stopped++;
2239                         netif_stop_queue(dev);
2240                         pr->queue_stopped = 1;
2241                 }
2242                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2243         }
2244         dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
2245         spin_unlock(&pr->xmit_lock);
2246
2247         return NETDEV_TX_OK;
2248 }
2249
2250 static void ehea_vlan_rx_register(struct net_device *dev,
2251                                   struct vlan_group *grp)
2252 {
2253         struct ehea_port *port = netdev_priv(dev);
2254         struct ehea_adapter *adapter = port->adapter;
2255         struct hcp_ehea_port_cb1 *cb1;
2256         u64 hret;
2257
2258         port->vgrp = grp;
2259
2260         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2261         if (!cb1) {
2262                 ehea_error("no mem for cb1");
2263                 goto out;
2264         }
2265
2266         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2267                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2268         if (hret != H_SUCCESS)
2269                 ehea_error("modify_ehea_port failed");
2270
2271         free_page((unsigned long)cb1);
2272 out:
2273         return;
2274 }
2275
2276 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2277 {
2278         struct ehea_port *port = netdev_priv(dev);
2279         struct ehea_adapter *adapter = port->adapter;
2280         struct hcp_ehea_port_cb1 *cb1;
2281         int index;
2282         u64 hret;
2283
2284         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2285         if (!cb1) {
2286                 ehea_error("no mem for cb1");
2287                 goto out;
2288         }
2289
2290         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2291                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2292         if (hret != H_SUCCESS) {
2293                 ehea_error("query_ehea_port failed");
2294                 goto out;
2295         }
2296
2297         index = (vid / 64);
2298         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2299
2300         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2301                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2302         if (hret != H_SUCCESS)
2303                 ehea_error("modify_ehea_port failed");
2304 out:
2305         free_page((unsigned long)cb1);
2306         return;
2307 }
2308
2309 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2310 {
2311         struct ehea_port *port = netdev_priv(dev);
2312         struct ehea_adapter *adapter = port->adapter;
2313         struct hcp_ehea_port_cb1 *cb1;
2314         int index;
2315         u64 hret;
2316
2317         vlan_group_set_device(port->vgrp, vid, NULL);
2318
2319         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2320         if (!cb1) {
2321                 ehea_error("no mem for cb1");
2322                 goto out;
2323         }
2324
2325         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2326                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2327         if (hret != H_SUCCESS) {
2328                 ehea_error("query_ehea_port failed");
2329                 goto out;
2330         }
2331
2332         index = (vid / 64);
2333         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2334
2335         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2336                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2337         if (hret != H_SUCCESS)
2338                 ehea_error("modify_ehea_port failed");
2339 out:
2340         free_page((unsigned long)cb1);
2341         return;
2342 }
2343
2344 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2345 {
2346         int ret = -EIO;
2347         u64 hret;
2348         u16 dummy16 = 0;
2349         u64 dummy64 = 0;
2350         struct hcp_modify_qp_cb0 *cb0;
2351
2352         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2353         if (!cb0) {
2354                 ret = -ENOMEM;
2355                 goto out;
2356         }
2357
2358         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2359                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2360         if (hret != H_SUCCESS) {
2361                 ehea_error("query_ehea_qp failed (1)");
2362                 goto out;
2363         }
2364
2365         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2366         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2367                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2368                                      &dummy64, &dummy64, &dummy16, &dummy16);
2369         if (hret != H_SUCCESS) {
2370                 ehea_error("modify_ehea_qp failed (1)");
2371                 goto out;
2372         }
2373
2374         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2375                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2376         if (hret != H_SUCCESS) {
2377                 ehea_error("query_ehea_qp failed (2)");
2378                 goto out;
2379         }
2380
2381         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2382         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2383                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2384                                      &dummy64, &dummy64, &dummy16, &dummy16);
2385         if (hret != H_SUCCESS) {
2386                 ehea_error("modify_ehea_qp failed (2)");
2387                 goto out;
2388         }
2389
2390         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2391                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2392         if (hret != H_SUCCESS) {
2393                 ehea_error("query_ehea_qp failed (3)");
2394                 goto out;
2395         }
2396
2397         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2398         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2399                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2400                                      &dummy64, &dummy64, &dummy16, &dummy16);
2401         if (hret != H_SUCCESS) {
2402                 ehea_error("modify_ehea_qp failed (3)");
2403                 goto out;
2404         }
2405
2406         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2407                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2408         if (hret != H_SUCCESS) {
2409                 ehea_error("query_ehea_qp failed (4)");
2410                 goto out;
2411         }
2412
2413         ret = 0;
2414 out:
2415         free_page((unsigned long)cb0);
2416         return ret;
2417 }
2418
2419 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2420                                int add_tx_qps)
2421 {
2422         int ret, i;
2423         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2424         enum ehea_eq_type eq_type = EHEA_EQ;
2425
2426         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2427                                    EHEA_MAX_ENTRIES_EQ, 1);
2428         if (!port->qp_eq) {
2429                 ret = -EINVAL;
2430                 ehea_error("ehea_create_eq failed (qp_eq)");
2431                 goto out_kill_eq;
2432         }
2433
2434         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2435         pr_cfg.max_entries_scq = sq_entries * 2;
2436         pr_cfg.max_entries_sq = sq_entries;
2437         pr_cfg.max_entries_rq1 = rq1_entries;
2438         pr_cfg.max_entries_rq2 = rq2_entries;
2439         pr_cfg.max_entries_rq3 = rq3_entries;
2440
2441         pr_cfg_small_rx.max_entries_rcq = 1;
2442         pr_cfg_small_rx.max_entries_scq = sq_entries;
2443         pr_cfg_small_rx.max_entries_sq = sq_entries;
2444         pr_cfg_small_rx.max_entries_rq1 = 1;
2445         pr_cfg_small_rx.max_entries_rq2 = 1;
2446         pr_cfg_small_rx.max_entries_rq3 = 1;
2447
2448         for (i = 0; i < def_qps; i++) {
2449                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2450                 if (ret)
2451                         goto out_clean_pr;
2452         }
2453         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2454                 ret = ehea_init_port_res(port, &port->port_res[i],
2455                                          &pr_cfg_small_rx, i);
2456                 if (ret)
2457                         goto out_clean_pr;
2458         }
2459
2460         return 0;
2461
2462 out_clean_pr:
2463         while (--i >= 0)
2464                 ehea_clean_portres(port, &port->port_res[i]);
2465
2466 out_kill_eq:
2467         ehea_destroy_eq(port->qp_eq);
2468         return ret;
2469 }
2470
2471 static int ehea_clean_all_portres(struct ehea_port *port)
2472 {
2473         int ret = 0;
2474         int i;
2475
2476         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2477                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2478
2479         ret |= ehea_destroy_eq(port->qp_eq);
2480
2481         return ret;
2482 }
2483
2484 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2485 {
2486         if (adapter->active_ports)
2487                 return;
2488
2489         ehea_rem_mr(&adapter->mr);
2490 }
2491
2492 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2493 {
2494         if (adapter->active_ports)
2495                 return 0;
2496
2497         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2498 }
2499
2500 static int ehea_up(struct net_device *dev)
2501 {
2502         int ret, i;
2503         struct ehea_port *port = netdev_priv(dev);
2504
2505         if (port->state == EHEA_PORT_UP)
2506                 return 0;
2507
2508         ret = ehea_port_res_setup(port, port->num_def_qps,
2509                                   port->num_add_tx_qps);
2510         if (ret) {
2511                 ehea_error("port_res_failed");
2512                 goto out;
2513         }
2514
2515         /* Set default QP for this port */
2516         ret = ehea_configure_port(port);
2517         if (ret) {
2518                 ehea_error("ehea_configure_port failed. ret:%d", ret);
2519                 goto out_clean_pr;
2520         }
2521
2522         ret = ehea_reg_interrupts(dev);
2523         if (ret) {
2524                 ehea_error("reg_interrupts failed. ret:%d", ret);
2525                 goto out_clean_pr;
2526         }
2527
2528         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2529                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2530                 if (ret) {
2531                         ehea_error("activate_qp failed");
2532                         goto out_free_irqs;
2533                 }
2534         }
2535
2536         for (i = 0; i < port->num_def_qps; i++) {
2537                 ret = ehea_fill_port_res(&port->port_res[i]);
2538                 if (ret) {
2539                         ehea_error("out_free_irqs");
2540                         goto out_free_irqs;
2541                 }
2542         }
2543
2544         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2545         if (ret) {
2546                 ret = -EIO;
2547                 goto out_free_irqs;
2548         }
2549
2550         port->state = EHEA_PORT_UP;
2551
2552         ret = 0;
2553         goto out;
2554
2555 out_free_irqs:
2556         ehea_free_interrupts(dev);
2557
2558 out_clean_pr:
2559         ehea_clean_all_portres(port);
2560 out:
2561         if (ret)
2562                 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2563
2564         ehea_update_bcmc_registrations();
2565         ehea_update_firmware_handles();
2566
2567         return ret;
2568 }
2569
2570 static void port_napi_disable(struct ehea_port *port)
2571 {
2572         int i;
2573
2574         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2575                 napi_disable(&port->port_res[i].napi);
2576 }
2577
2578 static void port_napi_enable(struct ehea_port *port)
2579 {
2580         int i;
2581
2582         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2583                 napi_enable(&port->port_res[i].napi);
2584 }
2585
2586 static int ehea_open(struct net_device *dev)
2587 {
2588         int ret;
2589         struct ehea_port *port = netdev_priv(dev);
2590
2591         mutex_lock(&port->port_lock);
2592
2593         if (netif_msg_ifup(port))
2594                 ehea_info("enabling port %s", dev->name);
2595
2596         ret = ehea_up(dev);
2597         if (!ret) {
2598                 port_napi_enable(port);
2599                 netif_start_queue(dev);
2600         }
2601
2602         mutex_unlock(&port->port_lock);
2603
2604         return ret;
2605 }
2606
2607 static int ehea_down(struct net_device *dev)
2608 {
2609         int ret;
2610         struct ehea_port *port = netdev_priv(dev);
2611
2612         if (port->state == EHEA_PORT_DOWN)
2613                 return 0;
2614
2615         ehea_drop_multicast_list(dev);
2616         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2617
2618         ehea_free_interrupts(dev);
2619
2620         port->state = EHEA_PORT_DOWN;
2621
2622         ehea_update_bcmc_registrations();
2623
2624         ret = ehea_clean_all_portres(port);
2625         if (ret)
2626                 ehea_info("Failed freeing resources for %s. ret=%i",
2627                           dev->name, ret);
2628
2629         ehea_update_firmware_handles();
2630
2631         return ret;
2632 }
2633
2634 static int ehea_stop(struct net_device *dev)
2635 {
2636         int ret;
2637         struct ehea_port *port = netdev_priv(dev);
2638
2639         if (netif_msg_ifdown(port))
2640                 ehea_info("disabling port %s", dev->name);
2641
2642         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2643         cancel_work_sync(&port->reset_task);
2644         mutex_lock(&port->port_lock);
2645         netif_stop_queue(dev);
2646         port_napi_disable(port);
2647         ret = ehea_down(dev);
2648         mutex_unlock(&port->port_lock);
2649         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2650         return ret;
2651 }
2652
2653 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2654 {
2655         struct ehea_qp qp = *orig_qp;
2656         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2657         struct ehea_swqe *swqe;
2658         int wqe_index;
2659         int i;
2660
2661         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2662                 swqe = ehea_get_swqe(&qp, &wqe_index);
2663                 swqe->tx_control |= EHEA_SWQE_PURGE;
2664         }
2665 }
2666
2667 static void ehea_flush_sq(struct ehea_port *port)
2668 {
2669         int i;
2670
2671         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2672                 struct ehea_port_res *pr = &port->port_res[i];
2673                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2674                 int k = 0;
2675                 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2676                         msleep(5);
2677                         if (++k == 20)
2678                                 break;
2679                 }
2680         }
2681 }
2682
2683 int ehea_stop_qps(struct net_device *dev)
2684 {
2685         struct ehea_port *port = netdev_priv(dev);
2686         struct ehea_adapter *adapter = port->adapter;
2687         struct hcp_modify_qp_cb0 *cb0;
2688         int ret = -EIO;
2689         int dret;
2690         int i;
2691         u64 hret;
2692         u64 dummy64 = 0;
2693         u16 dummy16 = 0;
2694
2695         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2696         if (!cb0) {
2697                 ret = -ENOMEM;
2698                 goto out;
2699         }
2700
2701         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2702                 struct ehea_port_res *pr =  &port->port_res[i];
2703                 struct ehea_qp *qp = pr->qp;
2704
2705                 /* Purge send queue */
2706                 ehea_purge_sq(qp);
2707
2708                 /* Disable queue pair */
2709                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2710                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2711                                             cb0);
2712                 if (hret != H_SUCCESS) {
2713                         ehea_error("query_ehea_qp failed (1)");
2714                         goto out;
2715                 }
2716
2717                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2718                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2719
2720                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2721                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2722                                                             1), cb0, &dummy64,
2723                                              &dummy64, &dummy16, &dummy16);
2724                 if (hret != H_SUCCESS) {
2725                         ehea_error("modify_ehea_qp failed (1)");
2726                         goto out;
2727                 }
2728
2729                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2730                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2731                                             cb0);
2732                 if (hret != H_SUCCESS) {
2733                         ehea_error("query_ehea_qp failed (2)");
2734                         goto out;
2735                 }
2736
2737                 /* deregister shared memory regions */
2738                 dret = ehea_rem_smrs(pr);
2739                 if (dret) {
2740                         ehea_error("unreg shared memory region failed");
2741                         goto out;
2742                 }
2743         }
2744
2745         ret = 0;
2746 out:
2747         free_page((unsigned long)cb0);
2748
2749         return ret;
2750 }
2751
2752 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2753 {
2754         struct ehea_qp qp = *orig_qp;
2755         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2756         struct ehea_rwqe *rwqe;
2757         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2758         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2759         struct sk_buff *skb;
2760         u32 lkey = pr->recv_mr.lkey;
2761
2762
2763         int i;
2764         int index;
2765
2766         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2767                 rwqe = ehea_get_next_rwqe(&qp, 2);
2768                 rwqe->sg_list[0].l_key = lkey;
2769                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2770                 skb = skba_rq2[index];
2771                 if (skb)
2772                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2773         }
2774
2775         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2776                 rwqe = ehea_get_next_rwqe(&qp, 3);
2777                 rwqe->sg_list[0].l_key = lkey;
2778                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2779                 skb = skba_rq3[index];
2780                 if (skb)
2781                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2782         }
2783 }
2784
2785 int ehea_restart_qps(struct net_device *dev)
2786 {
2787         struct ehea_port *port = netdev_priv(dev);
2788         struct ehea_adapter *adapter = port->adapter;
2789         int ret = 0;
2790         int i;
2791
2792         struct hcp_modify_qp_cb0 *cb0;
2793         u64 hret;
2794         u64 dummy64 = 0;
2795         u16 dummy16 = 0;
2796
2797         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2798         if (!cb0) {
2799                 ret = -ENOMEM;
2800                 goto out;
2801         }
2802
2803         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2804                 struct ehea_port_res *pr =  &port->port_res[i];
2805                 struct ehea_qp *qp = pr->qp;
2806
2807                 ret = ehea_gen_smrs(pr);
2808                 if (ret) {
2809                         ehea_error("creation of shared memory regions failed");
2810                         goto out;
2811                 }
2812
2813                 ehea_update_rqs(qp, pr);
2814
2815                 /* Enable queue pair */
2816                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2817                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2818                                             cb0);
2819                 if (hret != H_SUCCESS) {
2820                         ehea_error("query_ehea_qp failed (1)");
2821                         goto out;
2822                 }
2823
2824                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2825                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2826
2827                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2828                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2829                                                             1), cb0, &dummy64,
2830                                              &dummy64, &dummy16, &dummy16);
2831                 if (hret != H_SUCCESS) {
2832                         ehea_error("modify_ehea_qp failed (1)");
2833                         goto out;
2834                 }
2835
2836                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2837                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2838                                             cb0);
2839                 if (hret != H_SUCCESS) {
2840                         ehea_error("query_ehea_qp failed (2)");
2841                         goto out;
2842                 }
2843
2844                 /* refill entire queue */
2845                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2846                 ehea_refill_rq2(pr, 0);
2847                 ehea_refill_rq3(pr, 0);
2848         }
2849 out:
2850         free_page((unsigned long)cb0);
2851
2852         return ret;
2853 }
2854
2855 static void ehea_reset_port(struct work_struct *work)
2856 {
2857         int ret;
2858         struct ehea_port *port =
2859                 container_of(work, struct ehea_port, reset_task);
2860         struct net_device *dev = port->netdev;
2861
2862         port->resets++;
2863         mutex_lock(&port->port_lock);
2864         netif_stop_queue(dev);
2865
2866         port_napi_disable(port);
2867
2868         ehea_down(dev);
2869
2870         ret = ehea_up(dev);
2871         if (ret)
2872                 goto out;
2873
2874         ehea_set_multicast_list(dev);
2875
2876         if (netif_msg_timer(port))
2877                 ehea_info("Device %s resetted successfully", dev->name);
2878
2879         port_napi_enable(port);
2880
2881         netif_wake_queue(dev);
2882 out:
2883         mutex_unlock(&port->port_lock);
2884         return;
2885 }
2886
2887 static void ehea_rereg_mrs(struct work_struct *work)
2888 {
2889         int ret, i;
2890         struct ehea_adapter *adapter;
2891
2892         ehea_info("LPAR memory changed - re-initializing driver");
2893
2894         list_for_each_entry(adapter, &adapter_list, list)
2895                 if (adapter->active_ports) {
2896                         /* Shutdown all ports */
2897                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2898                                 struct ehea_port *port = adapter->port[i];
2899                                 struct net_device *dev;
2900
2901                                 if (!port)
2902                                         continue;
2903
2904                                 dev = port->netdev;
2905
2906                                 if (dev->flags & IFF_UP) {
2907                                         mutex_lock(&port->port_lock);
2908                                         netif_stop_queue(dev);
2909                                         ehea_flush_sq(port);
2910                                         ret = ehea_stop_qps(dev);
2911                                         if (ret) {
2912                                                 mutex_unlock(&port->port_lock);
2913                                                 goto out;
2914                                         }
2915                                         port_napi_disable(port);
2916                                         mutex_unlock(&port->port_lock);
2917                                 }
2918                         }
2919
2920                         /* Unregister old memory region */
2921                         ret = ehea_rem_mr(&adapter->mr);
2922                         if (ret) {
2923                                 ehea_error("unregister MR failed - driver"
2924                                            " inoperable!");
2925                                 goto out;
2926                         }
2927                 }
2928
2929         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2930
2931         list_for_each_entry(adapter, &adapter_list, list)
2932                 if (adapter->active_ports) {
2933                         /* Register new memory region */
2934                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2935                         if (ret) {
2936                                 ehea_error("register MR failed - driver"
2937                                            " inoperable!");
2938                                 goto out;
2939                         }
2940
2941                         /* Restart all ports */
2942                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2943                                 struct ehea_port *port = adapter->port[i];
2944
2945                                 if (port) {
2946                                         struct net_device *dev = port->netdev;
2947
2948                                         if (dev->flags & IFF_UP) {
2949                                                 mutex_lock(&port->port_lock);
2950                                                 port_napi_enable(port);
2951                                                 ret = ehea_restart_qps(dev);
2952                                                 if (!ret)
2953                                                         netif_wake_queue(dev);
2954                                                 mutex_unlock(&port->port_lock);
2955                                         }
2956                                 }
2957                         }
2958                 }
2959         ehea_info("re-initializing driver complete");
2960 out:
2961         return;
2962 }
2963
2964 static void ehea_tx_watchdog(struct net_device *dev)
2965 {
2966         struct ehea_port *port = netdev_priv(dev);
2967
2968         if (netif_carrier_ok(dev) &&
2969             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2970                 ehea_schedule_port_reset(port);
2971 }
2972
2973 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2974 {
2975         struct hcp_query_ehea *cb;
2976         u64 hret;
2977         int ret;
2978
2979         cb = (void *)get_zeroed_page(GFP_KERNEL);
2980         if (!cb) {
2981                 ret = -ENOMEM;
2982                 goto out;
2983         }
2984
2985         hret = ehea_h_query_ehea(adapter->handle, cb);
2986
2987         if (hret != H_SUCCESS) {
2988                 ret = -EIO;
2989                 goto out_herr;
2990         }
2991
2992         adapter->max_mc_mac = cb->max_mc_mac - 1;
2993         ret = 0;
2994
2995 out_herr:
2996         free_page((unsigned long)cb);
2997 out:
2998         return ret;
2999 }
3000
3001 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3002 {
3003         struct hcp_ehea_port_cb4 *cb4;
3004         u64 hret;
3005         int ret = 0;
3006
3007         *jumbo = 0;
3008
3009         /* (Try to) enable *jumbo frames */
3010         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3011         if (!cb4) {
3012                 ehea_error("no mem for cb4");
3013                 ret = -ENOMEM;
3014                 goto out;
3015         } else {
3016                 hret = ehea_h_query_ehea_port(port->adapter->handle,
3017                                               port->logical_port_id,
3018                                               H_PORT_CB4,
3019                                               H_PORT_CB4_JUMBO, cb4);
3020                 if (hret == H_SUCCESS) {
3021                         if (cb4->jumbo_frame)
3022                                 *jumbo = 1;
3023                         else {
3024                                 cb4->jumbo_frame = 1;
3025                                 hret = ehea_h_modify_ehea_port(port->adapter->
3026                                                                handle,
3027                                                                port->
3028                                                                logical_port_id,
3029                                                                H_PORT_CB4,
3030                                                                H_PORT_CB4_JUMBO,
3031                                                                cb4);
3032                                 if (hret == H_SUCCESS)
3033                                         *jumbo = 1;
3034                         }
3035                 } else
3036                         ret = -EINVAL;
3037
3038                 free_page((unsigned long)cb4);
3039         }
3040 out:
3041         return ret;
3042 }
3043
3044 static ssize_t ehea_show_port_id(struct device *dev,
3045                                  struct device_attribute *attr, char *buf)
3046 {
3047         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3048         return sprintf(buf, "%d", port->logical_port_id);
3049 }
3050
3051 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3052                    NULL);
3053
3054 static void __devinit logical_port_release(struct device *dev)
3055 {
3056         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3057         of_node_put(port->ofdev.node);
3058 }
3059
3060 static struct device *ehea_register_port(struct ehea_port *port,
3061                                          struct device_node *dn)
3062 {
3063         int ret;
3064
3065         port->ofdev.node = of_node_get(dn);
3066         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3067         port->ofdev.dev.bus = &ibmebus_bus_type;
3068
3069         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3070         port->ofdev.dev.release = logical_port_release;
3071
3072         ret = of_device_register(&port->ofdev);
3073         if (ret) {
3074                 ehea_error("failed to register device. ret=%d", ret);
3075                 goto out;
3076         }
3077
3078         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3079         if (ret) {
3080                 ehea_error("failed to register attributes, ret=%d", ret);
3081                 goto out_unreg_of_dev;
3082         }
3083
3084         return &port->ofdev.dev;
3085
3086 out_unreg_of_dev:
3087         of_device_unregister(&port->ofdev);
3088 out:
3089         return NULL;
3090 }
3091
3092 static void ehea_unregister_port(struct ehea_port *port)
3093 {
3094         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3095         of_device_unregister(&port->ofdev);
3096 }
3097
3098 static const struct net_device_ops ehea_netdev_ops = {
3099         .ndo_open               = ehea_open,
3100         .ndo_stop               = ehea_stop,
3101         .ndo_start_xmit         = ehea_start_xmit,
3102 #ifdef CONFIG_NET_POLL_CONTROLLER
3103         .ndo_poll_controller    = ehea_netpoll,
3104 #endif
3105         .ndo_get_stats          = ehea_get_stats,
3106         .ndo_set_mac_address    = ehea_set_mac_addr,
3107         .ndo_validate_addr      = eth_validate_addr,
3108         .ndo_set_multicast_list = ehea_set_multicast_list,
3109         .ndo_change_mtu         = ehea_change_mtu,
3110         .ndo_vlan_rx_register   = ehea_vlan_rx_register,
3111         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3112         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3113         .ndo_tx_timeout         = ehea_tx_watchdog,
3114 };
3115
3116 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3117                                          u32 logical_port_id,
3118                                          struct device_node *dn)
3119 {
3120         int ret;
3121         struct net_device *dev;
3122         struct ehea_port *port;
3123         struct device *port_dev;
3124         int jumbo;
3125
3126         /* allocate memory for the port structures */
3127         dev = alloc_etherdev(sizeof(struct ehea_port));
3128
3129         if (!dev) {
3130                 ehea_error("no mem for net_device");
3131                 ret = -ENOMEM;
3132                 goto out_err;
3133         }
3134
3135         port = netdev_priv(dev);
3136
3137         mutex_init(&port->port_lock);
3138         port->state = EHEA_PORT_DOWN;
3139         port->sig_comp_iv = sq_entries / 10;
3140
3141         port->adapter = adapter;
3142         port->netdev = dev;
3143         port->logical_port_id = logical_port_id;
3144
3145         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3146
3147         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3148         if (!port->mc_list) {
3149                 ret = -ENOMEM;
3150                 goto out_free_ethdev;
3151         }
3152
3153         INIT_LIST_HEAD(&port->mc_list->list);
3154
3155         ret = ehea_sense_port_attr(port);
3156         if (ret)
3157                 goto out_free_mc_list;
3158
3159         port_dev = ehea_register_port(port, dn);
3160         if (!port_dev)
3161                 goto out_free_mc_list;
3162
3163         SET_NETDEV_DEV(dev, port_dev);
3164
3165         /* initialize net_device structure */
3166         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3167
3168         dev->netdev_ops = &ehea_netdev_ops;
3169         ehea_set_ethtool_ops(dev);
3170
3171         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3172                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3173                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3174                       | NETIF_F_LLTX;
3175         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3176
3177         INIT_WORK(&port->reset_task, ehea_reset_port);
3178
3179         ret = register_netdev(dev);
3180         if (ret) {
3181                 ehea_error("register_netdev failed. ret=%d", ret);
3182                 goto out_unreg_port;
3183         }
3184
3185         port->lro_max_aggr = lro_max_aggr;
3186
3187         ret = ehea_get_jumboframe_status(port, &jumbo);
3188         if (ret)
3189                 ehea_error("failed determining jumbo frame status for %s",
3190                            port->netdev->name);
3191
3192         ehea_info("%s: Jumbo frames are %sabled", dev->name,
3193                   jumbo == 1 ? "en" : "dis");
3194
3195         adapter->active_ports++;
3196
3197         return port;
3198
3199 out_unreg_port:
3200         ehea_unregister_port(port);
3201
3202 out_free_mc_list:
3203         kfree(port->mc_list);
3204
3205 out_free_ethdev:
3206         free_netdev(dev);
3207
3208 out_err:
3209         ehea_error("setting up logical port with id=%d failed, ret=%d",
3210                    logical_port_id, ret);
3211         return NULL;
3212 }
3213
3214 static void ehea_shutdown_single_port(struct ehea_port *port)
3215 {
3216         struct ehea_adapter *adapter = port->adapter;
3217         unregister_netdev(port->netdev);
3218         ehea_unregister_port(port);
3219         kfree(port->mc_list);
3220         free_netdev(port->netdev);
3221         adapter->active_ports--;
3222 }
3223
3224 static int ehea_setup_ports(struct ehea_adapter *adapter)
3225 {
3226         struct device_node *lhea_dn;
3227         struct device_node *eth_dn = NULL;
3228
3229         const u32 *dn_log_port_id;
3230         int i = 0;
3231
3232         lhea_dn = adapter->ofdev->node;
3233         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3234
3235                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3236                                                  NULL);
3237                 if (!dn_log_port_id) {
3238                         ehea_error("bad device node: eth_dn name=%s",
3239                                    eth_dn->full_name);
3240                         continue;
3241                 }
3242
3243                 if (ehea_add_adapter_mr(adapter)) {
3244                         ehea_error("creating MR failed");
3245                         of_node_put(eth_dn);
3246                         return -EIO;
3247                 }
3248
3249                 adapter->port[i] = ehea_setup_single_port(adapter,
3250                                                           *dn_log_port_id,
3251                                                           eth_dn);
3252                 if (adapter->port[i])
3253                         ehea_info("%s -> logical port id #%d",
3254                                   adapter->port[i]->netdev->name,
3255                                   *dn_log_port_id);
3256                 else
3257                         ehea_remove_adapter_mr(adapter);
3258
3259                 i++;
3260         };
3261         return 0;
3262 }
3263
3264 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3265                                            u32 logical_port_id)
3266 {
3267         struct device_node *lhea_dn;
3268         struct device_node *eth_dn = NULL;
3269         const u32 *dn_log_port_id;
3270
3271         lhea_dn = adapter->ofdev->node;
3272         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3273
3274                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3275                                                  NULL);
3276                 if (dn_log_port_id)
3277                         if (*dn_log_port_id == logical_port_id)
3278                                 return eth_dn;
3279         };
3280
3281         return NULL;
3282 }
3283
3284 static ssize_t ehea_probe_port(struct device *dev,
3285                                struct device_attribute *attr,
3286                                const char *buf, size_t count)
3287 {
3288         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3289         struct ehea_port *port;
3290         struct device_node *eth_dn = NULL;
3291         int i;
3292
3293         u32 logical_port_id;
3294
3295         sscanf(buf, "%d", &logical_port_id);
3296
3297         port = ehea_get_port(adapter, logical_port_id);
3298
3299         if (port) {
3300                 ehea_info("adding port with logical port id=%d failed. port "
3301                           "already configured as %s.", logical_port_id,
3302                           port->netdev->name);
3303                 return -EINVAL;
3304         }
3305
3306         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3307
3308         if (!eth_dn) {
3309                 ehea_info("no logical port with id %d found", logical_port_id);
3310                 return -EINVAL;
3311         }
3312
3313         if (ehea_add_adapter_mr(adapter)) {
3314                 ehea_error("creating MR failed");
3315                 return -EIO;
3316         }
3317
3318         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3319
3320         of_node_put(eth_dn);
3321
3322         if (port) {
3323                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3324                         if (!adapter->port[i]) {
3325                                 adapter->port[i] = port;
3326                                 break;
3327                         }
3328
3329                 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3330                           logical_port_id);
3331         } else {
3332                 ehea_remove_adapter_mr(adapter);
3333                 return -EIO;
3334         }
3335
3336         return (ssize_t) count;
3337 }
3338
3339 static ssize_t ehea_remove_port(struct device *dev,
3340                                 struct device_attribute *attr,
3341                                 const char *buf, size_t count)
3342 {
3343         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3344         struct ehea_port *port;
3345         int i;
3346         u32 logical_port_id;
3347
3348         sscanf(buf, "%d", &logical_port_id);
3349
3350         port = ehea_get_port(adapter, logical_port_id);
3351
3352         if (port) {
3353                 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3354                           logical_port_id);
3355
3356                 ehea_shutdown_single_port(port);
3357
3358                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3359                         if (adapter->port[i] == port) {
3360                                 adapter->port[i] = NULL;
3361                                 break;
3362                         }
3363         } else {
3364                 ehea_error("removing port with logical port id=%d failed. port "
3365                            "not configured.", logical_port_id);
3366                 return -EINVAL;
3367         }
3368
3369         ehea_remove_adapter_mr(adapter);
3370
3371         return (ssize_t) count;
3372 }
3373
3374 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3375 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3376
3377 int ehea_create_device_sysfs(struct of_device *dev)
3378 {
3379         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3380         if (ret)
3381                 goto out;
3382
3383         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3384 out:
3385         return ret;
3386 }
3387
3388 void ehea_remove_device_sysfs(struct of_device *dev)
3389 {
3390         device_remove_file(&dev->dev, &dev_attr_probe_port);
3391         device_remove_file(&dev->dev, &dev_attr_remove_port);
3392 }
3393
3394 static int __devinit ehea_probe_adapter(struct of_device *dev,
3395                                         const struct of_device_id *id)
3396 {
3397         struct ehea_adapter *adapter;
3398         const u64 *adapter_handle;
3399         int ret;
3400
3401         if (!dev || !dev->node) {
3402                 ehea_error("Invalid ibmebus device probed");
3403                 return -EINVAL;
3404         }
3405
3406         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3407         if (!adapter) {
3408                 ret = -ENOMEM;
3409                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3410                 goto out;
3411         }
3412
3413         list_add(&adapter->list, &adapter_list);
3414
3415         adapter->ofdev = dev;
3416
3417         adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3418                                          NULL);
3419         if (adapter_handle)
3420                 adapter->handle = *adapter_handle;
3421
3422         if (!adapter->handle) {
3423                 dev_err(&dev->dev, "failed getting handle for adapter"
3424                         " '%s'\n", dev->node->full_name);
3425                 ret = -ENODEV;
3426                 goto out_free_ad;
3427         }
3428
3429         adapter->pd = EHEA_PD_ID;
3430
3431         dev_set_drvdata(&dev->dev, adapter);
3432
3433
3434         /* initialize adapter and ports */
3435         /* get adapter properties */
3436         ret = ehea_sense_adapter_attr(adapter);
3437         if (ret) {
3438                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3439                 goto out_free_ad;
3440         }
3441
3442         adapter->neq = ehea_create_eq(adapter,
3443                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3444         if (!adapter->neq) {
3445                 ret = -EIO;
3446                 dev_err(&dev->dev, "NEQ creation failed\n");
3447                 goto out_free_ad;
3448         }
3449
3450         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3451                      (unsigned long)adapter);
3452
3453         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3454                                   ehea_interrupt_neq, IRQF_DISABLED,
3455                                   "ehea_neq", adapter);
3456         if (ret) {
3457                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3458                 goto out_kill_eq;
3459         }
3460
3461         ret = ehea_create_device_sysfs(dev);
3462         if (ret)
3463                 goto out_free_irq;
3464
3465         ret = ehea_setup_ports(adapter);
3466         if (ret) {
3467                 dev_err(&dev->dev, "setup_ports failed\n");
3468                 goto out_rem_dev_sysfs;
3469         }
3470
3471         ret = 0;
3472         goto out;
3473
3474 out_rem_dev_sysfs:
3475         ehea_remove_device_sysfs(dev);
3476
3477 out_free_irq:
3478         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3479
3480 out_kill_eq:
3481         ehea_destroy_eq(adapter->neq);
3482
3483 out_free_ad:
3484         list_del(&adapter->list);
3485         kfree(adapter);
3486
3487 out:
3488         ehea_update_firmware_handles();
3489
3490         return ret;
3491 }
3492
3493 static int __devexit ehea_remove(struct of_device *dev)
3494 {
3495         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3496         int i;
3497
3498         for (i = 0; i < EHEA_MAX_PORTS; i++)
3499                 if (adapter->port[i]) {
3500                         ehea_shutdown_single_port(adapter->port[i]);
3501                         adapter->port[i] = NULL;
3502                 }
3503
3504         ehea_remove_device_sysfs(dev);
3505
3506         flush_scheduled_work();
3507
3508         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3509         tasklet_kill(&adapter->neq_tasklet);
3510
3511         ehea_destroy_eq(adapter->neq);
3512         ehea_remove_adapter_mr(adapter);
3513         list_del(&adapter->list);
3514         kfree(adapter);
3515
3516         ehea_update_firmware_handles();
3517
3518         return 0;
3519 }
3520
3521 void ehea_crash_handler(void)
3522 {
3523         int i;
3524
3525         if (ehea_fw_handles.arr)
3526                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3527                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3528                                              ehea_fw_handles.arr[i].fwh,
3529                                              FORCE_FREE);
3530
3531         if (ehea_bcmc_regs.arr)
3532                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3533                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3534                                               ehea_bcmc_regs.arr[i].port_id,
3535                                               ehea_bcmc_regs.arr[i].reg_type,
3536                                               ehea_bcmc_regs.arr[i].macaddr,
3537                                               0, H_DEREG_BCMC);
3538 }
3539
3540 static int ehea_mem_notifier(struct notifier_block *nb,
3541                              unsigned long action, void *data)
3542 {
3543         int ret = NOTIFY_BAD;
3544         struct memory_notify *arg = data;
3545
3546         if (!mutex_trylock(&dlpar_mem_lock)) {
3547                 ehea_info("ehea_mem_notifier must not be called parallelized");
3548                 goto out;
3549         }
3550
3551         switch (action) {
3552         case MEM_CANCEL_OFFLINE:
3553                 ehea_info("memory offlining canceled");
3554                 /* Readd canceled memory block */
3555         case MEM_ONLINE:
3556                 ehea_info("memory is going online");
3557                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3558                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3559                         goto out_unlock;
3560                 ehea_rereg_mrs(NULL);
3561                 break;
3562         case MEM_GOING_OFFLINE:
3563                 ehea_info("memory is going offline");
3564                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3565                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3566                         goto out_unlock;
3567                 ehea_rereg_mrs(NULL);
3568                 break;
3569         default:
3570                 break;
3571         }
3572
3573         ehea_update_firmware_handles();
3574         ret = NOTIFY_OK;
3575
3576 out_unlock:
3577         mutex_unlock(&dlpar_mem_lock);
3578 out:
3579         return ret;
3580 }
3581
3582 static struct notifier_block ehea_mem_nb = {
3583         .notifier_call = ehea_mem_notifier,
3584 };
3585
3586 static int ehea_reboot_notifier(struct notifier_block *nb,
3587                                 unsigned long action, void *unused)
3588 {
3589         if (action == SYS_RESTART) {
3590                 ehea_info("Reboot: freeing all eHEA resources");
3591                 ibmebus_unregister_driver(&ehea_driver);
3592         }
3593         return NOTIFY_DONE;
3594 }
3595
3596 static struct notifier_block ehea_reboot_nb = {
3597         .notifier_call = ehea_reboot_notifier,
3598 };
3599
3600 static int check_module_parm(void)
3601 {
3602         int ret = 0;
3603
3604         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3605             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3606                 ehea_info("Bad parameter: rq1_entries");
3607                 ret = -EINVAL;
3608         }
3609         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3610             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3611                 ehea_info("Bad parameter: rq2_entries");
3612                 ret = -EINVAL;
3613         }
3614         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3615             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3616                 ehea_info("Bad parameter: rq3_entries");
3617                 ret = -EINVAL;
3618         }
3619         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3620             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3621                 ehea_info("Bad parameter: sq_entries");
3622                 ret = -EINVAL;
3623         }
3624
3625         return ret;
3626 }
3627
3628 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3629                                       char *buf)
3630 {
3631         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3632 }
3633
3634 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3635                    ehea_show_capabilities, NULL);
3636
3637 int __init ehea_module_init(void)
3638 {
3639         int ret;
3640
3641         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3642                DRV_VERSION);
3643
3644
3645         INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3646         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3647         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3648
3649         mutex_init(&ehea_fw_handles.lock);
3650         spin_lock_init(&ehea_bcmc_regs.lock);
3651
3652         ret = check_module_parm();
3653         if (ret)
3654                 goto out;
3655
3656         ret = ehea_create_busmap();
3657         if (ret)
3658                 goto out;
3659
3660         ret = register_reboot_notifier(&ehea_reboot_nb);
3661         if (ret)
3662                 ehea_info("failed registering reboot notifier");
3663
3664         ret = register_memory_notifier(&ehea_mem_nb);
3665         if (ret)
3666                 ehea_info("failed registering memory remove notifier");
3667
3668         ret = crash_shutdown_register(&ehea_crash_handler);
3669         if (ret)
3670                 ehea_info("failed registering crash handler");
3671
3672         ret = ibmebus_register_driver(&ehea_driver);
3673         if (ret) {
3674                 ehea_error("failed registering eHEA device driver on ebus");
3675                 goto out2;
3676         }
3677
3678         ret = driver_create_file(&ehea_driver.driver,
3679                                  &driver_attr_capabilities);
3680         if (ret) {
3681                 ehea_error("failed to register capabilities attribute, ret=%d",
3682                            ret);
3683                 goto out3;
3684         }
3685
3686         return ret;
3687
3688 out3:
3689         ibmebus_unregister_driver(&ehea_driver);
3690 out2:
3691         unregister_memory_notifier(&ehea_mem_nb);
3692         unregister_reboot_notifier(&ehea_reboot_nb);
3693         crash_shutdown_unregister(&ehea_crash_handler);
3694 out:
3695         return ret;
3696 }
3697
3698 static void __exit ehea_module_exit(void)
3699 {
3700         int ret;
3701
3702         flush_scheduled_work();
3703         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3704         ibmebus_unregister_driver(&ehea_driver);
3705         unregister_reboot_notifier(&ehea_reboot_nb);
3706         ret = crash_shutdown_unregister(&ehea_crash_handler);
3707         if (ret)
3708                 ehea_info("failed unregistering crash handler");
3709         unregister_memory_notifier(&ehea_mem_nb);
3710         kfree(ehea_fw_handles.arr);
3711         kfree(ehea_bcmc_regs.arr);
3712         ehea_destroy_busmap();
3713 }
3714
3715 module_init(ehea_module_init);
3716 module_exit(ehea_module_exit);