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   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include <linux/in.h>
  30 #include <linux/ip.h>
  31 #include <linux/tcp.h>
  32 #include <linux/udp.h>
  33 #include <linux/if.h>
  34 #include <linux/list.h>
  35 #include <linux/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("Send Completion Error: Resetting port");
 795                         if (netif_msg_tx_err(pr->port))
 796                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 797                         ehea_schedule_port_reset(pr->port);
 798                         break;
 799                 }
 800
 801                 if (netif_msg_tx_done(pr->port))
 802                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 803
 804                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 805                            == EHEA_SWQE2_TYPE)) {
 806
 807                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 808                         skb = pr->sq_skba.arr[index];
 809                         dev_kfree_skb(skb);
 810                         pr->sq_skba.arr[index] = NULL;
 811                 }
 812
 813                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 814                 quota--;
 815
 816                 cqe = ehea_poll_cq(send_cq);
 817         };
 818
 819         ehea_update_feca(send_cq, cqe_counter);
 820         atomic_add(swqe_av, &pr->swqe_avail);
 821
 822         spin_lock_irqsave(&pr->netif_queue, flags);
 823
 824         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 825                                   >= pr->swqe_refill_th)) {
 826                 netif_wake_queue(pr->port->netdev);
 827                 pr->queue_stopped = 0;
 828         }
 829         spin_unlock_irqrestore(&pr->netif_queue, flags);
 830
 831         return cqe;
 832 }
 833
 834 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 835 #define EHEA_POLL_MAX_CQES 65535
 836
 837 static int ehea_poll(struct napi_struct *napi, int budget)
 838 {
 839         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 840                                                 napi);
 841         struct net_device *dev = pr->port->netdev;
 842         struct ehea_cqe *cqe;
 843         struct ehea_cqe *cqe_skb = NULL;
 844         int force_irq, wqe_index;
 845         int rx = 0;
 846
 847         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 848         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 849
 850         if (!force_irq)
 851                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 852
 853         while ((rx != budget) || force_irq) {
 854                 pr->poll_counter = 0;
 855                 force_irq = 0;
 856                 napi_complete(napi);
 857                 ehea_reset_cq_ep(pr->recv_cq);
 858                 ehea_reset_cq_ep(pr->send_cq);
 859                 ehea_reset_cq_n1(pr->recv_cq);
 860                 ehea_reset_cq_n1(pr->send_cq);
 861                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 862                 cqe_skb = ehea_poll_cq(pr->send_cq);
 863
 864                 if (!cqe && !cqe_skb)
 865                         return rx;
 866
 867                 if (!napi_reschedule(napi))
 868                         return rx;
 869
 870                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 871                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 872         }
 873
 874         pr->poll_counter++;
 875         return rx;
 876 }
 877
 878 #ifdef CONFIG_NET_POLL_CONTROLLER
 879 static void ehea_netpoll(struct net_device *dev)
 880 {
 881         struct ehea_port *port = netdev_priv(dev);
 882         int i;
 883
 884         for (i = 0; i < port->num_def_qps; i++)
 885                 napi_schedule(&port->port_res[i].napi);
 886 }
 887 #endif
 888
 889 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 890 {
 891         struct ehea_port_res *pr = param;
 892
 893         napi_schedule(&pr->napi);
 894
 895         return IRQ_HANDLED;
 896 }
 897
 898 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 899 {
 900         struct ehea_port *port = param;
 901         struct ehea_eqe *eqe;
 902         struct ehea_qp *qp;
 903         u32 qp_token;
 904
 905         eqe = ehea_poll_eq(port->qp_eq);
 906
 907         while (eqe) {
 908                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 909                 ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
 910                            eqe->entry, qp_token);
 911
 912                 qp = port->port_res[qp_token].qp;
 913                 ehea_error_data(port->adapter, qp->fw_handle);
 914                 eqe = ehea_poll_eq(port->qp_eq);
 915         }
 916
 917         ehea_schedule_port_reset(port);
 918
 919         return IRQ_HANDLED;
 920 }
 921
 922 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 923                                        int logical_port)
 924 {
 925         int i;
 926
 927         for (i = 0; i < EHEA_MAX_PORTS; i++)
 928                 if (adapter->port[i])
 929                         if (adapter->port[i]->logical_port_id == logical_port)
 930                                 return adapter->port[i];
 931         return NULL;
 932 }
 933
 934 int ehea_sense_port_attr(struct ehea_port *port)
 935 {
 936         int ret;
 937         u64 hret;
 938         struct hcp_ehea_port_cb0 *cb0;
 939
 940         /* may be called via ehea_neq_tasklet() */
 941         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 942         if (!cb0) {
 943                 ehea_error("no mem for cb0");
 944                 ret = -ENOMEM;
 945                 goto out;
 946         }
 947
 948         hret = ehea_h_query_ehea_port(port->adapter->handle,
 949                                       port->logical_port_id, H_PORT_CB0,
 950                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 951                                       cb0);
 952         if (hret != H_SUCCESS) {
 953                 ret = -EIO;
 954                 goto out_free;
 955         }
 956
 957         /* MAC address */
 958         port->mac_addr = cb0->port_mac_addr << 16;
 959
 960         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
 961                 ret = -EADDRNOTAVAIL;
 962                 goto out_free;
 963         }
 964
 965         /* Port speed */
 966         switch (cb0->port_speed) {
 967         case H_SPEED_10M_H:
 968                 port->port_speed = EHEA_SPEED_10M;
 969                 port->full_duplex = 0;
 970                 break;
 971         case H_SPEED_10M_F:
 972                 port->port_speed = EHEA_SPEED_10M;
 973                 port->full_duplex = 1;
 974                 break;
 975         case H_SPEED_100M_H:
 976                 port->port_speed = EHEA_SPEED_100M;
 977                 port->full_duplex = 0;
 978                 break;
 979         case H_SPEED_100M_F:
 980                 port->port_speed = EHEA_SPEED_100M;
 981                 port->full_duplex = 1;
 982                 break;
 983         case H_SPEED_1G_F:
 984                 port->port_speed = EHEA_SPEED_1G;
 985                 port->full_duplex = 1;
 986                 break;
 987         case H_SPEED_10G_F:
 988                 port->port_speed = EHEA_SPEED_10G;
 989                 port->full_duplex = 1;
 990                 break;
 991         default:
 992                 port->port_speed = 0;
 993                 port->full_duplex = 0;
 994                 break;
 995         }
 996
 997         port->autoneg = 1;
 998         port->num_mcs = cb0->num_default_qps;
 999
1000         /* Number of default QPs */
1001         if (use_mcs)
1002                 port->num_def_qps = cb0->num_default_qps;
1003         else
1004                 port->num_def_qps = 1;
1005
1006         if (!port->num_def_qps) {
1007                 ret = -EINVAL;
1008                 goto out_free;
1009         }
1010
1011         port->num_tx_qps = num_tx_qps;
1012
1013         if (port->num_def_qps >= port->num_tx_qps)
1014                 port->num_add_tx_qps = 0;
1015         else
1016                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1017
1018         ret = 0;
1019 out_free:
1020         if (ret || netif_msg_probe(port))
1021                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1022         free_page((unsigned long)cb0);
1023 out:
1024         return ret;
1025 }
1026
1027 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1028 {
1029         struct hcp_ehea_port_cb4 *cb4;
1030         u64 hret;
1031         int ret = 0;
1032
1033         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1034         if (!cb4) {
1035                 ehea_error("no mem for cb4");
1036                 ret = -ENOMEM;
1037                 goto out;
1038         }
1039
1040         cb4->port_speed = port_speed;
1041
1042         netif_carrier_off(port->netdev);
1043
1044         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1045                                        port->logical_port_id,
1046                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1047         if (hret == H_SUCCESS) {
1048                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1049
1050                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1051                                               port->logical_port_id,
1052                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1053                                               cb4);
1054                 if (hret == H_SUCCESS) {
1055                         switch (cb4->port_speed) {
1056                         case H_SPEED_10M_H:
1057                                 port->port_speed = EHEA_SPEED_10M;
1058                                 port->full_duplex = 0;
1059                                 break;
1060                         case H_SPEED_10M_F:
1061                                 port->port_speed = EHEA_SPEED_10M;
1062                                 port->full_duplex = 1;
1063                                 break;
1064                         case H_SPEED_100M_H:
1065                                 port->port_speed = EHEA_SPEED_100M;
1066                                 port->full_duplex = 0;
1067                                 break;
1068                         case H_SPEED_100M_F:
1069                                 port->port_speed = EHEA_SPEED_100M;
1070                                 port->full_duplex = 1;
1071                                 break;
1072                         case H_SPEED_1G_F:
1073                                 port->port_speed = EHEA_SPEED_1G;
1074                                 port->full_duplex = 1;
1075                                 break;
1076                         case H_SPEED_10G_F:
1077                                 port->port_speed = EHEA_SPEED_10G;
1078                                 port->full_duplex = 1;
1079                                 break;
1080                         default:
1081                                 port->port_speed = 0;
1082                                 port->full_duplex = 0;
1083                                 break;
1084                         }
1085                 } else {
1086                         ehea_error("Failed sensing port speed");
1087                         ret = -EIO;
1088                 }
1089         } else {
1090                 if (hret == H_AUTHORITY) {
1091                         ehea_info("Hypervisor denied setting port speed");
1092                         ret = -EPERM;
1093                 } else {
1094                         ret = -EIO;
1095                         ehea_error("Failed setting port speed");
1096                 }
1097         }
1098         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1099                 netif_carrier_on(port->netdev);
1100
1101         free_page((unsigned long)cb4);
1102 out:
1103         return ret;
1104 }
1105
1106 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1107 {
1108         int ret;
1109         u8 ec;
1110         u8 portnum;
1111         struct ehea_port *port;
1112
1113         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1114         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1115         port = ehea_get_port(adapter, portnum);
1116
1117         switch (ec) {
1118         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1119
1120                 if (!port) {
1121                         ehea_error("unknown portnum %x", portnum);
1122                         break;
1123                 }
1124
1125                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1126                         if (!netif_carrier_ok(port->netdev)) {
1127                                 ret = ehea_sense_port_attr(port);
1128                                 if (ret) {
1129                                         ehea_error("failed resensing port "
1130                                                    "attributes");
1131                                         break;
1132                                 }
1133
1134                                 if (netif_msg_link(port))
1135                                         ehea_info("%s: Logical port up: %dMbps "
1136                                                   "%s Duplex",
1137                                                   port->netdev->name,
1138                                                   port->port_speed,
1139                                                   port->full_duplex ==
1140                                                   1 ? "Full" : "Half");
1141
1142                                 netif_carrier_on(port->netdev);
1143                                 netif_wake_queue(port->netdev);
1144                         }
1145                 } else
1146                         if (netif_carrier_ok(port->netdev)) {
1147                                 if (netif_msg_link(port))
1148                                         ehea_info("%s: Logical port down",
1149                                                   port->netdev->name);
1150                                 netif_carrier_off(port->netdev);
1151                                 netif_stop_queue(port->netdev);
1152                         }
1153
1154                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1155                         port->phy_link = EHEA_PHY_LINK_UP;
1156                         if (netif_msg_link(port))
1157                                 ehea_info("%s: Physical port up",
1158                                           port->netdev->name);
1159                         if (prop_carrier_state)
1160                                 netif_carrier_on(port->netdev);
1161                 } else {
1162                         port->phy_link = EHEA_PHY_LINK_DOWN;
1163                         if (netif_msg_link(port))
1164                                 ehea_info("%s: Physical port down",
1165                                           port->netdev->name);
1166                         if (prop_carrier_state)
1167                                 netif_carrier_off(port->netdev);
1168                 }
1169
1170                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1171                         ehea_info("External switch port is primary port");
1172                 else
1173                         ehea_info("External switch port is backup port");
1174
1175                 break;
1176         case EHEA_EC_ADAPTER_MALFUNC:
1177                 ehea_error("Adapter malfunction");
1178                 break;
1179         case EHEA_EC_PORT_MALFUNC:
1180                 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1181                 netif_carrier_off(port->netdev);
1182                 netif_stop_queue(port->netdev);
1183                 break;
1184         default:
1185                 ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
1186                 break;
1187         }
1188 }
1189
1190 static void ehea_neq_tasklet(unsigned long data)
1191 {
1192         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1193         struct ehea_eqe *eqe;
1194         u64 event_mask;
1195
1196         eqe = ehea_poll_eq(adapter->neq);
1197         ehea_debug("eqe=%p", eqe);
1198
1199         while (eqe) {
1200                 ehea_debug("*eqe=%lx", eqe->entry);
1201                 ehea_parse_eqe(adapter, eqe->entry);
1202                 eqe = ehea_poll_eq(adapter->neq);
1203                 ehea_debug("next eqe=%p", eqe);
1204         }
1205
1206         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1207                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1208                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1209
1210         ehea_h_reset_events(adapter->handle,
1211                             adapter->neq->fw_handle, event_mask);
1212 }
1213
1214 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1215 {
1216         struct ehea_adapter *adapter = param;
1217         tasklet_hi_schedule(&adapter->neq_tasklet);
1218         return IRQ_HANDLED;
1219 }
1220
1221
1222 static int ehea_fill_port_res(struct ehea_port_res *pr)
1223 {
1224         int ret;
1225         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1226
1227         ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1228                                - init_attr->act_nr_rwqes_rq2
1229                                - init_attr->act_nr_rwqes_rq3 - 1);
1230
1231         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1232
1233         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1234
1235         return ret;
1236 }
1237
1238 static int ehea_reg_interrupts(struct net_device *dev)
1239 {
1240         struct ehea_port *port = netdev_priv(dev);
1241         struct ehea_port_res *pr;
1242         int i, ret;
1243
1244
1245         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1246                  dev->name);
1247
1248         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1249                                   ehea_qp_aff_irq_handler,
1250                                   IRQF_DISABLED, port->int_aff_name, port);
1251         if (ret) {
1252                 ehea_error("failed registering irq for qp_aff_irq_handler:"
1253                            "ist=%X", port->qp_eq->attr.ist1);
1254                 goto out_free_qpeq;
1255         }
1256
1257         if (netif_msg_ifup(port))
1258                 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1259                           "registered", port->qp_eq->attr.ist1);
1260
1261
1262         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1263                 pr = &port->port_res[i];
1264                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1265                          "%s-queue%d", dev->name, i);
1266                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1267                                           ehea_recv_irq_handler,
1268                                           IRQF_DISABLED, pr->int_send_name,
1269                                           pr);
1270                 if (ret) {
1271                         ehea_error("failed registering irq for ehea_queue "
1272                                    "port_res_nr:%d, ist=%X", i,
1273                                    pr->eq->attr.ist1);
1274                         goto out_free_req;
1275                 }
1276                 if (netif_msg_ifup(port))
1277                         ehea_info("irq_handle 0x%X for function ehea_queue_int "
1278                                   "%d registered", pr->eq->attr.ist1, i);
1279         }
1280 out:
1281         return ret;
1282
1283
1284 out_free_req:
1285         while (--i >= 0) {
1286                 u32 ist = port->port_res[i].eq->attr.ist1;
1287                 ibmebus_free_irq(ist, &port->port_res[i]);
1288         }
1289
1290 out_free_qpeq:
1291         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1292         i = port->num_def_qps;
1293
1294         goto out;
1295
1296 }
1297
1298 static void ehea_free_interrupts(struct net_device *dev)
1299 {
1300         struct ehea_port *port = netdev_priv(dev);
1301         struct ehea_port_res *pr;
1302         int i;
1303
1304         /* send */
1305
1306         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1307                 pr = &port->port_res[i];
1308                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1309                 if (netif_msg_intr(port))
1310                         ehea_info("free send irq for res %d with handle 0x%X",
1311                                   i, pr->eq->attr.ist1);
1312         }
1313
1314         /* associated events */
1315         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1316         if (netif_msg_intr(port))
1317                 ehea_info("associated event interrupt for handle 0x%X freed",
1318                           port->qp_eq->attr.ist1);
1319 }
1320
1321 static int ehea_configure_port(struct ehea_port *port)
1322 {
1323         int ret, i;
1324         u64 hret, mask;
1325         struct hcp_ehea_port_cb0 *cb0;
1326
1327         ret = -ENOMEM;
1328         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1329         if (!cb0)
1330                 goto out;
1331
1332         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1333                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1334                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1335                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1336                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1337                                       PXLY_RC_VLAN_FILTER)
1338                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1339
1340         for (i = 0; i < port->num_mcs; i++)
1341                 if (use_mcs)
1342                         cb0->default_qpn_arr[i] =
1343                                 port->port_res[i].qp->init_attr.qp_nr;
1344                 else
1345                         cb0->default_qpn_arr[i] =
1346                                 port->port_res[0].qp->init_attr.qp_nr;
1347
1348         if (netif_msg_ifup(port))
1349                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1350
1351         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1352              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1353
1354         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1355                                        port->logical_port_id,
1356                                        H_PORT_CB0, mask, cb0);
1357         ret = -EIO;
1358         if (hret != H_SUCCESS)
1359                 goto out_free;
1360
1361         ret = 0;
1362
1363 out_free:
1364         free_page((unsigned long)cb0);
1365 out:
1366         return ret;
1367 }
1368
1369 int ehea_gen_smrs(struct ehea_port_res *pr)
1370 {
1371         int ret;
1372         struct ehea_adapter *adapter = pr->port->adapter;
1373
1374         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1375         if (ret)
1376                 goto out;
1377
1378         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1379         if (ret)
1380                 goto out_free;
1381
1382         return 0;
1383
1384 out_free:
1385         ehea_rem_mr(&pr->send_mr);
1386 out:
1387         ehea_error("Generating SMRS failed\n");
1388         return -EIO;
1389 }
1390
1391 int ehea_rem_smrs(struct ehea_port_res *pr)
1392 {
1393         if ((ehea_rem_mr(&pr->send_mr)) ||
1394             (ehea_rem_mr(&pr->recv_mr)))
1395                 return -EIO;
1396         else
1397                 return 0;
1398 }
1399
1400 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1401 {
1402         int arr_size = sizeof(void *) * max_q_entries;
1403
1404         q_skba->arr = vmalloc(arr_size);
1405         if (!q_skba->arr)
1406                 return -ENOMEM;
1407
1408         memset(q_skba->arr, 0, arr_size);
1409
1410         q_skba->len = max_q_entries;
1411         q_skba->index = 0;
1412         q_skba->os_skbs = 0;
1413
1414         return 0;
1415 }
1416
1417 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1418                               struct port_res_cfg *pr_cfg, int queue_token)
1419 {
1420         struct ehea_adapter *adapter = port->adapter;
1421         enum ehea_eq_type eq_type = EHEA_EQ;
1422         struct ehea_qp_init_attr *init_attr = NULL;
1423         int ret = -EIO;
1424
1425         memset(pr, 0, sizeof(struct ehea_port_res));
1426
1427         pr->port = port;
1428         spin_lock_init(&pr->xmit_lock);
1429         spin_lock_init(&pr->netif_queue);
1430
1431         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1432         if (!pr->eq) {
1433                 ehea_error("create_eq failed (eq)");
1434                 goto out_free;
1435         }
1436
1437         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1438                                      pr->eq->fw_handle,
1439                                      port->logical_port_id);
1440         if (!pr->recv_cq) {
1441                 ehea_error("create_cq failed (cq_recv)");
1442                 goto out_free;
1443         }
1444
1445         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1446                                      pr->eq->fw_handle,
1447                                      port->logical_port_id);
1448         if (!pr->send_cq) {
1449                 ehea_error("create_cq failed (cq_send)");
1450                 goto out_free;
1451         }
1452
1453         if (netif_msg_ifup(port))
1454                 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1455                           pr->send_cq->attr.act_nr_of_cqes,
1456                           pr->recv_cq->attr.act_nr_of_cqes);
1457
1458         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1459         if (!init_attr) {
1460                 ret = -ENOMEM;
1461                 ehea_error("no mem for ehea_qp_init_attr");
1462                 goto out_free;
1463         }
1464
1465         init_attr->low_lat_rq1 = 1;
1466         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1467         init_attr->rq_count = 3;
1468         init_attr->qp_token = queue_token;
1469         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1470         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1471         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1472         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1473         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1474         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1475         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1476         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1477         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1478         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1479         init_attr->port_nr = port->logical_port_id;
1480         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1481         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1482         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1483
1484         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1485         if (!pr->qp) {
1486                 ehea_error("create_qp failed");
1487                 ret = -EIO;
1488                 goto out_free;
1489         }
1490
1491         if (netif_msg_ifup(port))
1492                 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1493                           "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1494                           init_attr->act_nr_send_wqes,
1495                           init_attr->act_nr_rwqes_rq1,
1496                           init_attr->act_nr_rwqes_rq2,
1497                           init_attr->act_nr_rwqes_rq3);
1498
1499         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1500
1501         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1502         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1503         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1504         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1505         if (ret)
1506                 goto out_free;
1507
1508         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1509         if (ehea_gen_smrs(pr) != 0) {
1510                 ret = -EIO;
1511                 goto out_free;
1512         }
1513
1514         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1515
1516         kfree(init_attr);
1517
1518         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1519
1520         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1521         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1522         pr->lro_mgr.lro_arr = pr->lro_desc;
1523         pr->lro_mgr.get_skb_header = get_skb_hdr;
1524         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1525         pr->lro_mgr.dev = port->netdev;
1526         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1527         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1528
1529         ret = 0;
1530         goto out;
1531
1532 out_free:
1533         kfree(init_attr);
1534         vfree(pr->sq_skba.arr);
1535         vfree(pr->rq1_skba.arr);
1536         vfree(pr->rq2_skba.arr);
1537         vfree(pr->rq3_skba.arr);
1538         ehea_destroy_qp(pr->qp);
1539         ehea_destroy_cq(pr->send_cq);
1540         ehea_destroy_cq(pr->recv_cq);
1541         ehea_destroy_eq(pr->eq);
1542 out:
1543         return ret;
1544 }
1545
1546 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1547 {
1548         int ret, i;
1549
1550         if (pr->qp)
1551                 netif_napi_del(&pr->napi);
1552
1553         ret = ehea_destroy_qp(pr->qp);
1554
1555         if (!ret) {
1556                 ehea_destroy_cq(pr->send_cq);
1557                 ehea_destroy_cq(pr->recv_cq);
1558                 ehea_destroy_eq(pr->eq);
1559
1560                 for (i = 0; i < pr->rq1_skba.len; i++)
1561                         if (pr->rq1_skba.arr[i])
1562                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1563
1564                 for (i = 0; i < pr->rq2_skba.len; i++)
1565                         if (pr->rq2_skba.arr[i])
1566                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1567
1568                 for (i = 0; i < pr->rq3_skba.len; i++)
1569                         if (pr->rq3_skba.arr[i])
1570                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1571
1572                 for (i = 0; i < pr->sq_skba.len; i++)
1573                         if (pr->sq_skba.arr[i])
1574                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1575
1576                 vfree(pr->rq1_skba.arr);
1577                 vfree(pr->rq2_skba.arr);
1578                 vfree(pr->rq3_skba.arr);
1579                 vfree(pr->sq_skba.arr);
1580                 ret = ehea_rem_smrs(pr);
1581         }
1582         return ret;
1583 }
1584
1585 /*
1586  * The write_* functions store information in swqe which is used by
1587  * the hardware to calculate the ip/tcp/udp checksum
1588  */
1589
1590 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1591                                       const struct sk_buff *skb)
1592 {
1593         swqe->ip_start = skb_network_offset(skb);
1594         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1595 }
1596
1597 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1598                                         const struct sk_buff *skb)
1599 {
1600         swqe->tcp_offset =
1601                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1602
1603         swqe->tcp_end = (u16)skb->len - 1;
1604 }
1605
1606 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1607                                         const struct sk_buff *skb)
1608 {
1609         swqe->tcp_offset =
1610                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1611
1612         swqe->tcp_end = (u16)skb->len - 1;
1613 }
1614
1615
1616 static void write_swqe2_TSO(struct sk_buff *skb,
1617                             struct ehea_swqe *swqe, u32 lkey)
1618 {
1619         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1620         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1621         int skb_data_size = skb->len - skb->data_len;
1622         int headersize;
1623
1624         /* Packet is TCP with TSO enabled */
1625         swqe->tx_control |= EHEA_SWQE_TSO;
1626         swqe->mss = skb_shinfo(skb)->gso_size;
1627         /* copy only eth/ip/tcp headers to immediate data and
1628          * the rest of skb->data to sg1entry
1629          */
1630         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1631
1632         skb_data_size = skb->len - skb->data_len;
1633
1634         if (skb_data_size >= headersize) {
1635                 /* copy immediate data */
1636                 skb_copy_from_linear_data(skb, imm_data, headersize);
1637                 swqe->immediate_data_length = headersize;
1638
1639                 if (skb_data_size > headersize) {
1640                         /* set sg1entry data */
1641                         sg1entry->l_key = lkey;
1642                         sg1entry->len = skb_data_size - headersize;
1643                         sg1entry->vaddr =
1644                                 ehea_map_vaddr(skb->data + headersize);
1645                         swqe->descriptors++;
1646                 }
1647         } else
1648                 ehea_error("cannot handle fragmented headers");
1649 }
1650
1651 static void write_swqe2_nonTSO(struct sk_buff *skb,
1652                                struct ehea_swqe *swqe, u32 lkey)
1653 {
1654         int skb_data_size = skb->len - skb->data_len;
1655         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1656         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1657
1658         /* Packet is any nonTSO type
1659          *
1660          * Copy as much as possible skb->data to immediate data and
1661          * the rest to sg1entry
1662          */
1663         if (skb_data_size >= SWQE2_MAX_IMM) {
1664                 /* copy immediate data */
1665                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1666
1667                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1668
1669                 if (skb_data_size > SWQE2_MAX_IMM) {
1670                         /* copy sg1entry data */
1671                         sg1entry->l_key = lkey;
1672                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1673                         sg1entry->vaddr =
1674                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1675                         swqe->descriptors++;
1676                 }
1677         } else {
1678                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1679                 swqe->immediate_data_length = skb_data_size;
1680         }
1681 }
1682
1683 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1684                                     struct ehea_swqe *swqe, u32 lkey)
1685 {
1686         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1687         skb_frag_t *frag;
1688         int nfrags, sg1entry_contains_frag_data, i;
1689
1690         nfrags = skb_shinfo(skb)->nr_frags;
1691         sg1entry = &swqe->u.immdata_desc.sg_entry;
1692         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1693         swqe->descriptors = 0;
1694         sg1entry_contains_frag_data = 0;
1695
1696         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1697                 write_swqe2_TSO(skb, swqe, lkey);
1698         else
1699                 write_swqe2_nonTSO(skb, swqe, lkey);
1700
1701         /* write descriptors */
1702         if (nfrags > 0) {
1703                 if (swqe->descriptors == 0) {
1704                         /* sg1entry not yet used */
1705                         frag = &skb_shinfo(skb)->frags[0];
1706
1707                         /* copy sg1entry data */
1708                         sg1entry->l_key = lkey;
1709                         sg1entry->len = frag->size;
1710                         sg1entry->vaddr =
1711                                 ehea_map_vaddr(page_address(frag->page)
1712                                                + frag->page_offset);
1713                         swqe->descriptors++;
1714                         sg1entry_contains_frag_data = 1;
1715                 }
1716
1717                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1718
1719                         frag = &skb_shinfo(skb)->frags[i];
1720                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1721
1722                         sgentry->l_key = lkey;
1723                         sgentry->len = frag->size;
1724                         sgentry->vaddr =
1725                                 ehea_map_vaddr(page_address(frag->page)
1726                                                + frag->page_offset);
1727                         swqe->descriptors++;
1728                 }
1729         }
1730 }
1731
1732 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1733 {
1734         int ret = 0;
1735         u64 hret;
1736         u8 reg_type;
1737
1738         /* De/Register untagged packets */
1739         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1740         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1741                                      port->logical_port_id,
1742                                      reg_type, port->mac_addr, 0, hcallid);
1743         if (hret != H_SUCCESS) {
1744                 ehea_error("%sregistering bc address failed (tagged)",
1745                            hcallid == H_REG_BCMC ? "" : "de");
1746                 ret = -EIO;
1747                 goto out_herr;
1748         }
1749
1750         /* De/Register VLAN packets */
1751         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1752         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1753                                      port->logical_port_id,
1754                                      reg_type, port->mac_addr, 0, hcallid);
1755         if (hret != H_SUCCESS) {
1756                 ehea_error("%sregistering bc address failed (vlan)",
1757                            hcallid == H_REG_BCMC ? "" : "de");
1758                 ret = -EIO;
1759         }
1760 out_herr:
1761         return ret;
1762 }
1763
1764 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1765 {
1766         struct ehea_port *port = netdev_priv(dev);
1767         struct sockaddr *mac_addr = sa;
1768         struct hcp_ehea_port_cb0 *cb0;
1769         int ret;
1770         u64 hret;
1771
1772         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1773                 ret = -EADDRNOTAVAIL;
1774                 goto out;
1775         }
1776
1777         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1778         if (!cb0) {
1779                 ehea_error("no mem for cb0");
1780                 ret = -ENOMEM;
1781                 goto out;
1782         }
1783
1784         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1785
1786         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1787
1788         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1789                                        port->logical_port_id, H_PORT_CB0,
1790                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1791         if (hret != H_SUCCESS) {
1792                 ret = -EIO;
1793                 goto out_free;
1794         }
1795
1796         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1797
1798         /* Deregister old MAC in pHYP */
1799         if (port->state == EHEA_PORT_UP) {
1800                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1801                 if (ret)
1802                         goto out_upregs;
1803         }
1804
1805         port->mac_addr = cb0->port_mac_addr << 16;
1806
1807         /* Register new MAC in pHYP */
1808         if (port->state == EHEA_PORT_UP) {
1809                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1810                 if (ret)
1811                         goto out_upregs;
1812         }
1813
1814         ret = 0;
1815
1816 out_upregs:
1817         ehea_update_bcmc_registrations();
1818 out_free:
1819         free_page((unsigned long)cb0);
1820 out:
1821         return ret;
1822 }
1823
1824 static void ehea_promiscuous_error(u64 hret, int enable)
1825 {
1826         if (hret == H_AUTHORITY)
1827                 ehea_info("Hypervisor denied %sabling promiscuous mode",
1828                           enable == 1 ? "en" : "dis");
1829         else
1830                 ehea_error("failed %sabling promiscuous mode",
1831                            enable == 1 ? "en" : "dis");
1832 }
1833
1834 static void ehea_promiscuous(struct net_device *dev, int enable)
1835 {
1836         struct ehea_port *port = netdev_priv(dev);
1837         struct hcp_ehea_port_cb7 *cb7;
1838         u64 hret;
1839
1840         if ((enable && port->promisc) || (!enable && !port->promisc))
1841                 return;
1842
1843         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1844         if (!cb7) {
1845                 ehea_error("no mem for cb7");
1846                 goto out;
1847         }
1848
1849         /* Modify Pxs_DUCQPN in CB7 */
1850         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1851
1852         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1853                                        port->logical_port_id,
1854                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1855         if (hret) {
1856                 ehea_promiscuous_error(hret, enable);
1857                 goto out;
1858         }
1859
1860         port->promisc = enable;
1861 out:
1862         free_page((unsigned long)cb7);
1863         return;
1864 }
1865
1866 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1867                                      u32 hcallid)
1868 {
1869         u64 hret;
1870         u8 reg_type;
1871
1872         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1873                  | EHEA_BCMC_UNTAGGED;
1874
1875         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1876                                      port->logical_port_id,
1877                                      reg_type, mc_mac_addr, 0, hcallid);
1878         if (hret)
1879                 goto out;
1880
1881         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1882                  | EHEA_BCMC_VLANID_ALL;
1883
1884         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1885                                      port->logical_port_id,
1886                                      reg_type, mc_mac_addr, 0, hcallid);
1887 out:
1888         return hret;
1889 }
1890
1891 static int ehea_drop_multicast_list(struct net_device *dev)
1892 {
1893         struct ehea_port *port = netdev_priv(dev);
1894         struct ehea_mc_list *mc_entry = port->mc_list;
1895         struct list_head *pos;
1896         struct list_head *temp;
1897         int ret = 0;
1898         u64 hret;
1899
1900         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1901                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1902
1903                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1904                                                  H_DEREG_BCMC);
1905                 if (hret) {
1906                         ehea_error("failed deregistering mcast MAC");
1907                         ret = -EIO;
1908                 }
1909
1910                 list_del(pos);
1911                 kfree(mc_entry);
1912         }
1913         return ret;
1914 }
1915
1916 static void ehea_allmulti(struct net_device *dev, int enable)
1917 {
1918         struct ehea_port *port = netdev_priv(dev);
1919         u64 hret;
1920
1921         if (!port->allmulti) {
1922                 if (enable) {
1923                         /* Enable ALLMULTI */
1924                         ehea_drop_multicast_list(dev);
1925                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1926                         if (!hret)
1927                                 port->allmulti = 1;
1928                         else
1929                                 ehea_error("failed enabling IFF_ALLMULTI");
1930                 }
1931         } else
1932                 if (!enable) {
1933                         /* Disable ALLMULTI */
1934                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1935                         if (!hret)
1936                                 port->allmulti = 0;
1937                         else
1938                                 ehea_error("failed disabling IFF_ALLMULTI");
1939                 }
1940 }
1941
1942 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1943 {
1944         struct ehea_mc_list *ehea_mcl_entry;
1945         u64 hret;
1946
1947         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1948         if (!ehea_mcl_entry) {
1949                 ehea_error("no mem for mcl_entry");
1950                 return;
1951         }
1952
1953         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1954
1955         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1956
1957         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1958                                          H_REG_BCMC);
1959         if (!hret)
1960                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1961         else {
1962                 ehea_error("failed registering mcast MAC");
1963                 kfree(ehea_mcl_entry);
1964         }
1965 }
1966
1967 static void ehea_set_multicast_list(struct net_device *dev)
1968 {
1969         struct ehea_port *port = netdev_priv(dev);
1970         struct dev_mc_list *k_mcl_entry;
1971         int ret;
1972
1973         if (dev->flags & IFF_PROMISC) {
1974                 ehea_promiscuous(dev, 1);
1975                 return;
1976         }
1977         ehea_promiscuous(dev, 0);
1978
1979         if (dev->flags & IFF_ALLMULTI) {
1980                 ehea_allmulti(dev, 1);
1981                 goto out;
1982         }
1983         ehea_allmulti(dev, 0);
1984
1985         if (!netdev_mc_empty(dev)) {
1986                 ret = ehea_drop_multicast_list(dev);
1987                 if (ret) {
1988                         /* Dropping the current multicast list failed.
1989                          * Enabling ALL_MULTI is the best we can do.
1990                          */
1991                         ehea_allmulti(dev, 1);
1992                 }
1993
1994                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1995                         ehea_info("Mcast registration limit reached (0x%llx). "
1996                                   "Use ALLMULTI!",
1997                                   port->adapter->max_mc_mac);
1998                         goto out;
1999                 }
2000
2001                 netdev_for_each_mc_addr(k_mcl_entry, dev)
2002                         ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
2003
2004         }
2005 out:
2006         ehea_update_bcmc_registrations();
2007         return;
2008 }
2009
2010 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2011 {
2012         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2013                 return -EINVAL;
2014         dev->mtu = new_mtu;
2015         return 0;
2016 }
2017
2018 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2019                        struct ehea_swqe *swqe, u32 lkey)
2020 {
2021         if (skb->protocol == htons(ETH_P_IP)) {
2022                 const struct iphdr *iph = ip_hdr(skb);
2023
2024                 /* IPv4 */
2025                 swqe->tx_control |= EHEA_SWQE_CRC
2026                                  | EHEA_SWQE_IP_CHECKSUM
2027                                  | EHEA_SWQE_TCP_CHECKSUM
2028                                  | EHEA_SWQE_IMM_DATA_PRESENT
2029                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2030
2031                 write_ip_start_end(swqe, skb);
2032
2033                 if (iph->protocol == IPPROTO_UDP) {
2034                         if ((iph->frag_off & IP_MF) ||
2035                             (iph->frag_off & IP_OFFSET))
2036                                 /* IP fragment, so don't change cs */
2037                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2038                         else
2039                                 write_udp_offset_end(swqe, skb);
2040                 } else if (iph->protocol == IPPROTO_TCP) {
2041                         write_tcp_offset_end(swqe, skb);
2042                 }
2043
2044                 /* icmp (big data) and ip segmentation packets (all other ip
2045                    packets) do not require any special handling */
2046
2047         } else {
2048                 /* Other Ethernet Protocol */
2049                 swqe->tx_control |= EHEA_SWQE_CRC
2050                                  | EHEA_SWQE_IMM_DATA_PRESENT
2051                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2052         }
2053
2054         write_swqe2_data(skb, dev, swqe, lkey);
2055 }
2056
2057 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2058                        struct ehea_swqe *swqe)
2059 {
2060         int nfrags = skb_shinfo(skb)->nr_frags;
2061         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2062         skb_frag_t *frag;
2063         int i;
2064
2065         if (skb->protocol == htons(ETH_P_IP)) {
2066                 const struct iphdr *iph = ip_hdr(skb);
2067
2068                 /* IPv4 */
2069                 write_ip_start_end(swqe, skb);
2070
2071                 if (iph->protocol == IPPROTO_TCP) {
2072                         swqe->tx_control |= EHEA_SWQE_CRC
2073                                          | EHEA_SWQE_IP_CHECKSUM
2074                                          | EHEA_SWQE_TCP_CHECKSUM
2075                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2076
2077                         write_tcp_offset_end(swqe, skb);
2078
2079                 } else if (iph->protocol == IPPROTO_UDP) {
2080                         if ((iph->frag_off & IP_MF) ||
2081                             (iph->frag_off & IP_OFFSET))
2082                                 /* IP fragment, so don't change cs */
2083                                 swqe->tx_control |= EHEA_SWQE_CRC
2084                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2085                         else {
2086                                 swqe->tx_control |= EHEA_SWQE_CRC
2087                                                  | EHEA_SWQE_IP_CHECKSUM
2088                                                  | EHEA_SWQE_TCP_CHECKSUM
2089                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2090
2091                                 write_udp_offset_end(swqe, skb);
2092                         }
2093                 } else {
2094                         /* icmp (big data) and
2095                            ip segmentation packets (all other ip packets) */
2096                         swqe->tx_control |= EHEA_SWQE_CRC
2097                                          | EHEA_SWQE_IP_CHECKSUM
2098                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2099                 }
2100         } else {
2101                 /* Other Ethernet Protocol */
2102                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2103         }
2104         /* copy (immediate) data */
2105         if (nfrags == 0) {
2106                 /* data is in a single piece */
2107                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2108         } else {
2109                 /* first copy data from the skb->data buffer ... */
2110                 skb_copy_from_linear_data(skb, imm_data,
2111                                           skb->len - skb->data_len);
2112                 imm_data += skb->len - skb->data_len;
2113
2114                 /* ... then copy data from the fragments */
2115                 for (i = 0; i < nfrags; i++) {
2116                         frag = &skb_shinfo(skb)->frags[i];
2117                         memcpy(imm_data,
2118                                page_address(frag->page) + frag->page_offset,
2119                                frag->size);
2120                         imm_data += frag->size;
2121                 }
2122         }
2123         swqe->immediate_data_length = skb->len;
2124         dev_kfree_skb(skb);
2125 }
2126
2127 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2128 {
2129         struct tcphdr *tcp;
2130         u32 tmp;
2131
2132         if ((skb->protocol == htons(ETH_P_IP)) &&
2133             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2134                 tcp = (struct tcphdr *)(skb_network_header(skb) +
2135                                         (ip_hdr(skb)->ihl * 4));
2136                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2137                 tmp += ip_hdr(skb)->daddr % 31;
2138                 return tmp % num_qps;
2139         } else
2140                 return 0;
2141 }
2142
2143 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2144 {
2145         struct ehea_port *port = netdev_priv(dev);
2146         struct ehea_swqe *swqe;
2147         unsigned long flags;
2148         u32 lkey;
2149         int swqe_index;
2150         struct ehea_port_res *pr;
2151
2152         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2153
2154         if (!spin_trylock(&pr->xmit_lock))
2155                 return NETDEV_TX_BUSY;
2156
2157         if (pr->queue_stopped) {
2158                 spin_unlock(&pr->xmit_lock);
2159                 return NETDEV_TX_BUSY;
2160         }
2161
2162         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2163         memset(swqe, 0, SWQE_HEADER_SIZE);
2164         atomic_dec(&pr->swqe_avail);
2165
2166         if (skb->len <= SWQE3_MAX_IMM) {
2167                 u32 sig_iv = port->sig_comp_iv;
2168                 u32 swqe_num = pr->swqe_id_counter;
2169                 ehea_xmit3(skb, dev, swqe);
2170                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2171                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2172                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2173                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2174                                                       sig_iv);
2175                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2176                         pr->swqe_ll_count = 0;
2177                 } else
2178                         pr->swqe_ll_count += 1;
2179         } else {
2180                 swqe->wr_id =
2181                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2182                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2183                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2184                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2185                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2186
2187                 pr->sq_skba.index++;
2188                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2189
2190                 lkey = pr->send_mr.lkey;
2191                 ehea_xmit2(skb, dev, swqe, lkey);
2192                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2193         }
2194         pr->swqe_id_counter += 1;
2195
2196         if (port->vgrp && vlan_tx_tag_present(skb)) {
2197                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2198                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2199         }
2200
2201         if (netif_msg_tx_queued(port)) {
2202                 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2203                 ehea_dump(swqe, 512, "swqe");
2204         }
2205
2206         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2207                 netif_stop_queue(dev);
2208                 swqe->tx_control |= EHEA_SWQE_PURGE;
2209         }
2210
2211         ehea_post_swqe(pr->qp, swqe);
2212         pr->tx_packets++;
2213
2214         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2215                 spin_lock_irqsave(&pr->netif_queue, flags);
2216                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2217                         pr->p_stats.queue_stopped++;
2218                         netif_stop_queue(dev);
2219                         pr->queue_stopped = 1;
2220                 }
2221                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2222         }
2223         dev->trans_start = jiffies;
2224         spin_unlock(&pr->xmit_lock);
2225
2226         return NETDEV_TX_OK;
2227 }
2228
2229 static void ehea_vlan_rx_register(struct net_device *dev,
2230                                   struct vlan_group *grp)
2231 {
2232         struct ehea_port *port = netdev_priv(dev);
2233         struct ehea_adapter *adapter = port->adapter;
2234         struct hcp_ehea_port_cb1 *cb1;
2235         u64 hret;
2236
2237         port->vgrp = grp;
2238
2239         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2240         if (!cb1) {
2241                 ehea_error("no mem for cb1");
2242                 goto out;
2243         }
2244
2245         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2246                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2247         if (hret != H_SUCCESS)
2248                 ehea_error("modify_ehea_port failed");
2249
2250         free_page((unsigned long)cb1);
2251 out:
2252         return;
2253 }
2254
2255 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2256 {
2257         struct ehea_port *port = netdev_priv(dev);
2258         struct ehea_adapter *adapter = port->adapter;
2259         struct hcp_ehea_port_cb1 *cb1;
2260         int index;
2261         u64 hret;
2262
2263         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2264         if (!cb1) {
2265                 ehea_error("no mem for cb1");
2266                 goto out;
2267         }
2268
2269         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2270                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2271         if (hret != H_SUCCESS) {
2272                 ehea_error("query_ehea_port failed");
2273                 goto out;
2274         }
2275
2276         index = (vid / 64);
2277         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2278
2279         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2280                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2281         if (hret != H_SUCCESS)
2282                 ehea_error("modify_ehea_port failed");
2283 out:
2284         free_page((unsigned long)cb1);
2285         return;
2286 }
2287
2288 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2289 {
2290         struct ehea_port *port = netdev_priv(dev);
2291         struct ehea_adapter *adapter = port->adapter;
2292         struct hcp_ehea_port_cb1 *cb1;
2293         int index;
2294         u64 hret;
2295
2296         vlan_group_set_device(port->vgrp, vid, NULL);
2297
2298         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2299         if (!cb1) {
2300                 ehea_error("no mem for cb1");
2301                 goto out;
2302         }
2303
2304         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2305                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2306         if (hret != H_SUCCESS) {
2307                 ehea_error("query_ehea_port failed");
2308                 goto out;
2309         }
2310
2311         index = (vid / 64);
2312         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2313
2314         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2315                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2316         if (hret != H_SUCCESS)
2317                 ehea_error("modify_ehea_port failed");
2318 out:
2319         free_page((unsigned long)cb1);
2320         return;
2321 }
2322
2323 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2324 {
2325         int ret = -EIO;
2326         u64 hret;
2327         u16 dummy16 = 0;
2328         u64 dummy64 = 0;
2329         struct hcp_modify_qp_cb0 *cb0;
2330
2331         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2332         if (!cb0) {
2333                 ret = -ENOMEM;
2334                 goto out;
2335         }
2336
2337         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2338                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2339         if (hret != H_SUCCESS) {
2340                 ehea_error("query_ehea_qp failed (1)");
2341                 goto out;
2342         }
2343
2344         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2345         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2346                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2347                                      &dummy64, &dummy64, &dummy16, &dummy16);
2348         if (hret != H_SUCCESS) {
2349                 ehea_error("modify_ehea_qp failed (1)");
2350                 goto out;
2351         }
2352
2353         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2354                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2355         if (hret != H_SUCCESS) {
2356                 ehea_error("query_ehea_qp failed (2)");
2357                 goto out;
2358         }
2359
2360         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2361         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2362                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2363                                      &dummy64, &dummy64, &dummy16, &dummy16);
2364         if (hret != H_SUCCESS) {
2365                 ehea_error("modify_ehea_qp failed (2)");
2366                 goto out;
2367         }
2368
2369         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2370                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2371         if (hret != H_SUCCESS) {
2372                 ehea_error("query_ehea_qp failed (3)");
2373                 goto out;
2374         }
2375
2376         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2377         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2378                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2379                                      &dummy64, &dummy64, &dummy16, &dummy16);
2380         if (hret != H_SUCCESS) {
2381                 ehea_error("modify_ehea_qp failed (3)");
2382                 goto out;
2383         }
2384
2385         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2386                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2387         if (hret != H_SUCCESS) {
2388                 ehea_error("query_ehea_qp failed (4)");
2389                 goto out;
2390         }
2391
2392         ret = 0;
2393 out:
2394         free_page((unsigned long)cb0);
2395         return ret;
2396 }
2397
2398 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2399                                int add_tx_qps)
2400 {
2401         int ret, i;
2402         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2403         enum ehea_eq_type eq_type = EHEA_EQ;
2404
2405         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2406                                    EHEA_MAX_ENTRIES_EQ, 1);
2407         if (!port->qp_eq) {
2408                 ret = -EINVAL;
2409                 ehea_error("ehea_create_eq failed (qp_eq)");
2410                 goto out_kill_eq;
2411         }
2412
2413         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2414         pr_cfg.max_entries_scq = sq_entries * 2;
2415         pr_cfg.max_entries_sq = sq_entries;
2416         pr_cfg.max_entries_rq1 = rq1_entries;
2417         pr_cfg.max_entries_rq2 = rq2_entries;
2418         pr_cfg.max_entries_rq3 = rq3_entries;
2419
2420         pr_cfg_small_rx.max_entries_rcq = 1;
2421         pr_cfg_small_rx.max_entries_scq = sq_entries;
2422         pr_cfg_small_rx.max_entries_sq = sq_entries;
2423         pr_cfg_small_rx.max_entries_rq1 = 1;
2424         pr_cfg_small_rx.max_entries_rq2 = 1;
2425         pr_cfg_small_rx.max_entries_rq3 = 1;
2426
2427         for (i = 0; i < def_qps; i++) {
2428                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2429                 if (ret)
2430                         goto out_clean_pr;
2431         }
2432         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2433                 ret = ehea_init_port_res(port, &port->port_res[i],
2434                                          &pr_cfg_small_rx, i);
2435                 if (ret)
2436                         goto out_clean_pr;
2437         }
2438
2439         return 0;
2440
2441 out_clean_pr:
2442         while (--i >= 0)
2443                 ehea_clean_portres(port, &port->port_res[i]);
2444
2445 out_kill_eq:
2446         ehea_destroy_eq(port->qp_eq);
2447         return ret;
2448 }
2449
2450 static int ehea_clean_all_portres(struct ehea_port *port)
2451 {
2452         int ret = 0;
2453         int i;
2454
2455         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2456                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2457
2458         ret |= ehea_destroy_eq(port->qp_eq);
2459
2460         return ret;
2461 }
2462
2463 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2464 {
2465         if (adapter->active_ports)
2466                 return;
2467
2468         ehea_rem_mr(&adapter->mr);
2469 }
2470
2471 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2472 {
2473         if (adapter->active_ports)
2474                 return 0;
2475
2476         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2477 }
2478
2479 static int ehea_up(struct net_device *dev)
2480 {
2481         int ret, i;
2482         struct ehea_port *port = netdev_priv(dev);
2483
2484         if (port->state == EHEA_PORT_UP)
2485                 return 0;
2486
2487         ret = ehea_port_res_setup(port, port->num_def_qps,
2488                                   port->num_add_tx_qps);
2489         if (ret) {
2490                 ehea_error("port_res_failed");
2491                 goto out;
2492         }
2493
2494         /* Set default QP for this port */
2495         ret = ehea_configure_port(port);
2496         if (ret) {
2497                 ehea_error("ehea_configure_port failed. ret:%d", ret);
2498                 goto out_clean_pr;
2499         }
2500
2501         ret = ehea_reg_interrupts(dev);
2502         if (ret) {
2503                 ehea_error("reg_interrupts failed. ret:%d", ret);
2504                 goto out_clean_pr;
2505         }
2506
2507         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2508                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2509                 if (ret) {
2510                         ehea_error("activate_qp failed");
2511                         goto out_free_irqs;
2512                 }
2513         }
2514
2515         for (i = 0; i < port->num_def_qps; i++) {
2516                 ret = ehea_fill_port_res(&port->port_res[i]);
2517                 if (ret) {
2518                         ehea_error("out_free_irqs");
2519                         goto out_free_irqs;
2520                 }
2521         }
2522
2523         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2524         if (ret) {
2525                 ret = -EIO;
2526                 goto out_free_irqs;
2527         }
2528
2529         port->state = EHEA_PORT_UP;
2530
2531         ret = 0;
2532         goto out;
2533
2534 out_free_irqs:
2535         ehea_free_interrupts(dev);
2536
2537 out_clean_pr:
2538         ehea_clean_all_portres(port);
2539 out:
2540         if (ret)
2541                 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2542
2543         ehea_update_bcmc_registrations();
2544         ehea_update_firmware_handles();
2545
2546         return ret;
2547 }
2548
2549 static void port_napi_disable(struct ehea_port *port)
2550 {
2551         int i;
2552
2553         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2554                 napi_disable(&port->port_res[i].napi);
2555 }
2556
2557 static void port_napi_enable(struct ehea_port *port)
2558 {
2559         int i;
2560
2561         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2562                 napi_enable(&port->port_res[i].napi);
2563 }
2564
2565 static int ehea_open(struct net_device *dev)
2566 {
2567         int ret;
2568         struct ehea_port *port = netdev_priv(dev);
2569
2570         mutex_lock(&port->port_lock);
2571
2572         if (netif_msg_ifup(port))
2573                 ehea_info("enabling port %s", dev->name);
2574
2575         ret = ehea_up(dev);
2576         if (!ret) {
2577                 port_napi_enable(port);
2578                 netif_start_queue(dev);
2579         }
2580
2581         mutex_unlock(&port->port_lock);
2582
2583         return ret;
2584 }
2585
2586 static int ehea_down(struct net_device *dev)
2587 {
2588         int ret;
2589         struct ehea_port *port = netdev_priv(dev);
2590
2591         if (port->state == EHEA_PORT_DOWN)
2592                 return 0;
2593
2594         ehea_drop_multicast_list(dev);
2595         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2596
2597         ehea_free_interrupts(dev);
2598
2599         port->state = EHEA_PORT_DOWN;
2600
2601         ehea_update_bcmc_registrations();
2602
2603         ret = ehea_clean_all_portres(port);
2604         if (ret)
2605                 ehea_info("Failed freeing resources for %s. ret=%i",
2606                           dev->name, ret);
2607
2608         ehea_update_firmware_handles();
2609
2610         return ret;
2611 }
2612
2613 static int ehea_stop(struct net_device *dev)
2614 {
2615         int ret;
2616         struct ehea_port *port = netdev_priv(dev);
2617
2618         if (netif_msg_ifdown(port))
2619                 ehea_info("disabling port %s", dev->name);
2620
2621         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2622         cancel_work_sync(&port->reset_task);
2623         mutex_lock(&port->port_lock);
2624         netif_stop_queue(dev);
2625         port_napi_disable(port);
2626         ret = ehea_down(dev);
2627         mutex_unlock(&port->port_lock);
2628         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2629         return ret;
2630 }
2631
2632 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2633 {
2634         struct ehea_qp qp = *orig_qp;
2635         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2636         struct ehea_swqe *swqe;
2637         int wqe_index;
2638         int i;
2639
2640         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2641                 swqe = ehea_get_swqe(&qp, &wqe_index);
2642                 swqe->tx_control |= EHEA_SWQE_PURGE;
2643         }
2644 }
2645
2646 static void ehea_flush_sq(struct ehea_port *port)
2647 {
2648         int i;
2649
2650         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2651                 struct ehea_port_res *pr = &port->port_res[i];
2652                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2653                 int k = 0;
2654                 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2655                         msleep(5);
2656                         if (++k == 20)
2657                                 break;
2658                 }
2659         }
2660 }
2661
2662 int ehea_stop_qps(struct net_device *dev)
2663 {
2664         struct ehea_port *port = netdev_priv(dev);
2665         struct ehea_adapter *adapter = port->adapter;
2666         struct hcp_modify_qp_cb0 *cb0;
2667         int ret = -EIO;
2668         int dret;
2669         int i;
2670         u64 hret;
2671         u64 dummy64 = 0;
2672         u16 dummy16 = 0;
2673
2674         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2675         if (!cb0) {
2676                 ret = -ENOMEM;
2677                 goto out;
2678         }
2679
2680         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2681                 struct ehea_port_res *pr =  &port->port_res[i];
2682                 struct ehea_qp *qp = pr->qp;
2683
2684                 /* Purge send queue */
2685                 ehea_purge_sq(qp);
2686
2687                 /* Disable queue pair */
2688                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2689                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2690                                             cb0);
2691                 if (hret != H_SUCCESS) {
2692                         ehea_error("query_ehea_qp failed (1)");
2693                         goto out;
2694                 }
2695
2696                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2697                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2698
2699                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2700                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2701                                                             1), cb0, &dummy64,
2702                                              &dummy64, &dummy16, &dummy16);
2703                 if (hret != H_SUCCESS) {
2704                         ehea_error("modify_ehea_qp failed (1)");
2705                         goto out;
2706                 }
2707
2708                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2709                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2710                                             cb0);
2711                 if (hret != H_SUCCESS) {
2712                         ehea_error("query_ehea_qp failed (2)");
2713                         goto out;
2714                 }
2715
2716                 /* deregister shared memory regions */
2717                 dret = ehea_rem_smrs(pr);
2718                 if (dret) {
2719                         ehea_error("unreg shared memory region failed");
2720                         goto out;
2721                 }
2722         }
2723
2724         ret = 0;
2725 out:
2726         free_page((unsigned long)cb0);
2727
2728         return ret;
2729 }
2730
2731 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2732 {
2733         struct ehea_qp qp = *orig_qp;
2734         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2735         struct ehea_rwqe *rwqe;
2736         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2737         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2738         struct sk_buff *skb;
2739         u32 lkey = pr->recv_mr.lkey;
2740
2741
2742         int i;
2743         int index;
2744
2745         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2746                 rwqe = ehea_get_next_rwqe(&qp, 2);
2747                 rwqe->sg_list[0].l_key = lkey;
2748                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2749                 skb = skba_rq2[index];
2750                 if (skb)
2751                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2752         }
2753
2754         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2755                 rwqe = ehea_get_next_rwqe(&qp, 3);
2756                 rwqe->sg_list[0].l_key = lkey;
2757                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2758                 skb = skba_rq3[index];
2759                 if (skb)
2760                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2761         }
2762 }
2763
2764 int ehea_restart_qps(struct net_device *dev)
2765 {
2766         struct ehea_port *port = netdev_priv(dev);
2767         struct ehea_adapter *adapter = port->adapter;
2768         int ret = 0;
2769         int i;
2770
2771         struct hcp_modify_qp_cb0 *cb0;
2772         u64 hret;
2773         u64 dummy64 = 0;
2774         u16 dummy16 = 0;
2775
2776         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2777         if (!cb0) {
2778                 ret = -ENOMEM;
2779                 goto out;
2780         }
2781
2782         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2783                 struct ehea_port_res *pr =  &port->port_res[i];
2784                 struct ehea_qp *qp = pr->qp;
2785
2786                 ret = ehea_gen_smrs(pr);
2787                 if (ret) {
2788                         ehea_error("creation of shared memory regions failed");
2789                         goto out;
2790                 }
2791
2792                 ehea_update_rqs(qp, pr);
2793
2794                 /* Enable queue pair */
2795                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2796                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2797                                             cb0);
2798                 if (hret != H_SUCCESS) {
2799                         ehea_error("query_ehea_qp failed (1)");
2800                         goto out;
2801                 }
2802
2803                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2804                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2805
2806                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2807                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2808                                                             1), cb0, &dummy64,
2809                                              &dummy64, &dummy16, &dummy16);
2810                 if (hret != H_SUCCESS) {
2811                         ehea_error("modify_ehea_qp failed (1)");
2812                         goto out;
2813                 }
2814
2815                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2816                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2817                                             cb0);
2818                 if (hret != H_SUCCESS) {
2819                         ehea_error("query_ehea_qp failed (2)");
2820                         goto out;
2821                 }
2822
2823                 /* refill entire queue */
2824                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2825                 ehea_refill_rq2(pr, 0);
2826                 ehea_refill_rq3(pr, 0);
2827         }
2828 out:
2829         free_page((unsigned long)cb0);
2830
2831         return ret;
2832 }
2833
2834 static void ehea_reset_port(struct work_struct *work)
2835 {
2836         int ret;
2837         struct ehea_port *port =
2838                 container_of(work, struct ehea_port, reset_task);
2839         struct net_device *dev = port->netdev;
2840
2841         port->resets++;
2842         mutex_lock(&port->port_lock);
2843         netif_stop_queue(dev);
2844
2845         port_napi_disable(port);
2846
2847         ehea_down(dev);
2848
2849         ret = ehea_up(dev);
2850         if (ret)
2851                 goto out;
2852
2853         ehea_set_multicast_list(dev);
2854
2855         if (netif_msg_timer(port))
2856                 ehea_info("Device %s resetted successfully", dev->name);
2857
2858         port_napi_enable(port);
2859
2860         netif_wake_queue(dev);
2861 out:
2862         mutex_unlock(&port->port_lock);
2863         return;
2864 }
2865
2866 static void ehea_rereg_mrs(struct work_struct *work)
2867 {
2868         int ret, i;
2869         struct ehea_adapter *adapter;
2870
2871         mutex_lock(&dlpar_mem_lock);
2872         ehea_info("LPAR memory changed - re-initializing driver");
2873
2874         list_for_each_entry(adapter, &adapter_list, list)
2875                 if (adapter->active_ports) {
2876                         /* Shutdown all ports */
2877                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2878                                 struct ehea_port *port = adapter->port[i];
2879                                 struct net_device *dev;
2880
2881                                 if (!port)
2882                                         continue;
2883
2884                                 dev = port->netdev;
2885
2886                                 if (dev->flags & IFF_UP) {
2887                                         mutex_lock(&port->port_lock);
2888                                         netif_stop_queue(dev);
2889                                         ehea_flush_sq(port);
2890                                         ret = ehea_stop_qps(dev);
2891                                         if (ret) {
2892                                                 mutex_unlock(&port->port_lock);
2893                                                 goto out;
2894                                         }
2895                                         port_napi_disable(port);
2896                                         mutex_unlock(&port->port_lock);
2897                                 }
2898                         }
2899
2900                         /* Unregister old memory region */
2901                         ret = ehea_rem_mr(&adapter->mr);
2902                         if (ret) {
2903                                 ehea_error("unregister MR failed - driver"
2904                                            " inoperable!");
2905                                 goto out;
2906                         }
2907                 }
2908
2909         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2910
2911         list_for_each_entry(adapter, &adapter_list, list)
2912                 if (adapter->active_ports) {
2913                         /* Register new memory region */
2914                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2915                         if (ret) {
2916                                 ehea_error("register MR failed - driver"
2917                                            " inoperable!");
2918                                 goto out;
2919                         }
2920
2921                         /* Restart all ports */
2922                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2923                                 struct ehea_port *port = adapter->port[i];
2924
2925                                 if (port) {
2926                                         struct net_device *dev = port->netdev;
2927
2928                                         if (dev->flags & IFF_UP) {
2929                                                 mutex_lock(&port->port_lock);
2930                                                 port_napi_enable(port);
2931                                                 ret = ehea_restart_qps(dev);
2932                                                 if (!ret)
2933                                                         netif_wake_queue(dev);
2934                                                 mutex_unlock(&port->port_lock);
2935                                         }
2936                                 }
2937                         }
2938                 }
2939         ehea_info("re-initializing driver complete");
2940 out:
2941         mutex_unlock(&dlpar_mem_lock);
2942         return;
2943 }
2944
2945 static void ehea_tx_watchdog(struct net_device *dev)
2946 {
2947         struct ehea_port *port = netdev_priv(dev);
2948
2949         if (netif_carrier_ok(dev) &&
2950             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2951                 ehea_schedule_port_reset(port);
2952 }
2953
2954 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2955 {
2956         struct hcp_query_ehea *cb;
2957         u64 hret;
2958         int ret;
2959
2960         cb = (void *)get_zeroed_page(GFP_KERNEL);
2961         if (!cb) {
2962                 ret = -ENOMEM;
2963                 goto out;
2964         }
2965
2966         hret = ehea_h_query_ehea(adapter->handle, cb);
2967
2968         if (hret != H_SUCCESS) {
2969                 ret = -EIO;
2970                 goto out_herr;
2971         }
2972
2973         adapter->max_mc_mac = cb->max_mc_mac - 1;
2974         ret = 0;
2975
2976 out_herr:
2977         free_page((unsigned long)cb);
2978 out:
2979         return ret;
2980 }
2981
2982 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2983 {
2984         struct hcp_ehea_port_cb4 *cb4;
2985         u64 hret;
2986         int ret = 0;
2987
2988         *jumbo = 0;
2989
2990         /* (Try to) enable *jumbo frames */
2991         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2992         if (!cb4) {
2993                 ehea_error("no mem for cb4");
2994                 ret = -ENOMEM;
2995                 goto out;
2996         } else {
2997                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2998                                               port->logical_port_id,
2999                                               H_PORT_CB4,
3000                                               H_PORT_CB4_JUMBO, cb4);
3001                 if (hret == H_SUCCESS) {
3002                         if (cb4->jumbo_frame)
3003                                 *jumbo = 1;
3004                         else {
3005                                 cb4->jumbo_frame = 1;
3006                                 hret = ehea_h_modify_ehea_port(port->adapter->
3007                                                                handle,
3008                                                                port->
3009                                                                logical_port_id,
3010                                                                H_PORT_CB4,
3011                                                                H_PORT_CB4_JUMBO,
3012                                                                cb4);
3013                                 if (hret == H_SUCCESS)
3014                                         *jumbo = 1;
3015                         }
3016                 } else
3017                         ret = -EINVAL;
3018
3019                 free_page((unsigned long)cb4);
3020         }
3021 out:
3022         return ret;
3023 }
3024
3025 static ssize_t ehea_show_port_id(struct device *dev,
3026                                  struct device_attribute *attr, char *buf)
3027 {
3028         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3029         return sprintf(buf, "%d", port->logical_port_id);
3030 }
3031
3032 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3033                    NULL);
3034
3035 static void __devinit logical_port_release(struct device *dev)
3036 {
3037         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3038         of_node_put(port->ofdev.dev.of_node);
3039 }
3040
3041 static struct device *ehea_register_port(struct ehea_port *port,
3042                                          struct device_node *dn)
3043 {
3044         int ret;
3045
3046         port->ofdev.dev.of_node = of_node_get(dn);
3047         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3048         port->ofdev.dev.bus = &ibmebus_bus_type;
3049
3050         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3051         port->ofdev.dev.release = logical_port_release;
3052
3053         ret = of_device_register(&port->ofdev);
3054         if (ret) {
3055                 ehea_error("failed to register device. ret=%d", ret);
3056                 goto out;
3057         }
3058
3059         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3060         if (ret) {
3061                 ehea_error("failed to register attributes, ret=%d", ret);
3062                 goto out_unreg_of_dev;
3063         }
3064
3065         return &port->ofdev.dev;
3066
3067 out_unreg_of_dev:
3068         of_device_unregister(&port->ofdev);
3069 out:
3070         return NULL;
3071 }
3072
3073 static void ehea_unregister_port(struct ehea_port *port)
3074 {
3075         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3076         of_device_unregister(&port->ofdev);
3077 }
3078
3079 static const struct net_device_ops ehea_netdev_ops = {
3080         .ndo_open               = ehea_open,
3081         .ndo_stop               = ehea_stop,
3082         .ndo_start_xmit         = ehea_start_xmit,
3083 #ifdef CONFIG_NET_POLL_CONTROLLER
3084         .ndo_poll_controller    = ehea_netpoll,
3085 #endif
3086         .ndo_get_stats          = ehea_get_stats,
3087         .ndo_set_mac_address    = ehea_set_mac_addr,
3088         .ndo_validate_addr      = eth_validate_addr,
3089         .ndo_set_multicast_list = ehea_set_multicast_list,
3090         .ndo_change_mtu         = ehea_change_mtu,
3091         .ndo_vlan_rx_register   = ehea_vlan_rx_register,
3092         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3093         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3094         .ndo_tx_timeout         = ehea_tx_watchdog,
3095 };
3096
3097 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3098                                          u32 logical_port_id,
3099                                          struct device_node *dn)
3100 {
3101         int ret;
3102         struct net_device *dev;
3103         struct ehea_port *port;
3104         struct device *port_dev;
3105         int jumbo;
3106
3107         /* allocate memory for the port structures */
3108         dev = alloc_etherdev(sizeof(struct ehea_port));
3109
3110         if (!dev) {
3111                 ehea_error("no mem for net_device");
3112                 ret = -ENOMEM;
3113                 goto out_err;
3114         }
3115
3116         port = netdev_priv(dev);
3117
3118         mutex_init(&port->port_lock);
3119         port->state = EHEA_PORT_DOWN;
3120         port->sig_comp_iv = sq_entries / 10;
3121
3122         port->adapter = adapter;
3123         port->netdev = dev;
3124         port->logical_port_id = logical_port_id;
3125
3126         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3127
3128         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3129         if (!port->mc_list) {
3130                 ret = -ENOMEM;
3131                 goto out_free_ethdev;
3132         }
3133
3134         INIT_LIST_HEAD(&port->mc_list->list);
3135
3136         ret = ehea_sense_port_attr(port);
3137         if (ret)
3138                 goto out_free_mc_list;
3139
3140         port_dev = ehea_register_port(port, dn);
3141         if (!port_dev)
3142                 goto out_free_mc_list;
3143
3144         SET_NETDEV_DEV(dev, port_dev);
3145
3146         /* initialize net_device structure */
3147         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3148
3149         dev->netdev_ops = &ehea_netdev_ops;
3150         ehea_set_ethtool_ops(dev);
3151
3152         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3153                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3154                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3155                       | NETIF_F_LLTX;
3156         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3157
3158         INIT_WORK(&port->reset_task, ehea_reset_port);
3159
3160         ret = register_netdev(dev);
3161         if (ret) {
3162                 ehea_error("register_netdev failed. ret=%d", ret);
3163                 goto out_unreg_port;
3164         }
3165
3166         port->lro_max_aggr = lro_max_aggr;
3167
3168         ret = ehea_get_jumboframe_status(port, &jumbo);
3169         if (ret)
3170                 ehea_error("failed determining jumbo frame status for %s",
3171                            port->netdev->name);
3172
3173         ehea_info("%s: Jumbo frames are %sabled", dev->name,
3174                   jumbo == 1 ? "en" : "dis");
3175
3176         adapter->active_ports++;
3177
3178         return port;
3179
3180 out_unreg_port:
3181         ehea_unregister_port(port);
3182
3183 out_free_mc_list:
3184         kfree(port->mc_list);
3185
3186 out_free_ethdev:
3187         free_netdev(dev);
3188
3189 out_err:
3190         ehea_error("setting up logical port with id=%d failed, ret=%d",
3191                    logical_port_id, ret);
3192         return NULL;
3193 }
3194
3195 static void ehea_shutdown_single_port(struct ehea_port *port)
3196 {
3197         struct ehea_adapter *adapter = port->adapter;
3198         unregister_netdev(port->netdev);
3199         ehea_unregister_port(port);
3200         kfree(port->mc_list);
3201         free_netdev(port->netdev);
3202         adapter->active_ports--;
3203 }
3204
3205 static int ehea_setup_ports(struct ehea_adapter *adapter)
3206 {
3207         struct device_node *lhea_dn;
3208         struct device_node *eth_dn = NULL;
3209
3210         const u32 *dn_log_port_id;
3211         int i = 0;
3212
3213         lhea_dn = adapter->ofdev->dev.of_node;
3214         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3215
3216                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3217                                                  NULL);
3218                 if (!dn_log_port_id) {
3219                         ehea_error("bad device node: eth_dn name=%s",
3220                                    eth_dn->full_name);
3221                         continue;
3222                 }
3223
3224                 if (ehea_add_adapter_mr(adapter)) {
3225                         ehea_error("creating MR failed");
3226                         of_node_put(eth_dn);
3227                         return -EIO;
3228                 }
3229
3230                 adapter->port[i] = ehea_setup_single_port(adapter,
3231                                                           *dn_log_port_id,
3232                                                           eth_dn);
3233                 if (adapter->port[i])
3234                         ehea_info("%s -> logical port id #%d",
3235                                   adapter->port[i]->netdev->name,
3236                                   *dn_log_port_id);
3237                 else
3238                         ehea_remove_adapter_mr(adapter);
3239
3240                 i++;
3241         };
3242         return 0;
3243 }
3244
3245 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3246                                            u32 logical_port_id)
3247 {
3248         struct device_node *lhea_dn;
3249         struct device_node *eth_dn = NULL;
3250         const u32 *dn_log_port_id;
3251
3252         lhea_dn = adapter->ofdev->dev.of_node;
3253         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3254
3255                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3256                                                  NULL);
3257                 if (dn_log_port_id)
3258                         if (*dn_log_port_id == logical_port_id)
3259                                 return eth_dn;
3260         };
3261
3262         return NULL;
3263 }
3264
3265 static ssize_t ehea_probe_port(struct device *dev,
3266                                struct device_attribute *attr,
3267                                const char *buf, size_t count)
3268 {
3269         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3270         struct ehea_port *port;
3271         struct device_node *eth_dn = NULL;
3272         int i;
3273
3274         u32 logical_port_id;
3275
3276         sscanf(buf, "%d", &logical_port_id);
3277
3278         port = ehea_get_port(adapter, logical_port_id);
3279
3280         if (port) {
3281                 ehea_info("adding port with logical port id=%d failed. port "
3282                           "already configured as %s.", logical_port_id,
3283                           port->netdev->name);
3284                 return -EINVAL;
3285         }
3286
3287         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3288
3289         if (!eth_dn) {
3290                 ehea_info("no logical port with id %d found", logical_port_id);
3291                 return -EINVAL;
3292         }
3293
3294         if (ehea_add_adapter_mr(adapter)) {
3295                 ehea_error("creating MR failed");
3296                 return -EIO;
3297         }
3298
3299         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3300
3301         of_node_put(eth_dn);
3302
3303         if (port) {
3304                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3305                         if (!adapter->port[i]) {
3306                                 adapter->port[i] = port;
3307                                 break;
3308                         }
3309
3310                 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3311                           logical_port_id);
3312         } else {
3313                 ehea_remove_adapter_mr(adapter);
3314                 return -EIO;
3315         }
3316
3317         return (ssize_t) count;
3318 }
3319
3320 static ssize_t ehea_remove_port(struct device *dev,
3321                                 struct device_attribute *attr,
3322                                 const char *buf, size_t count)
3323 {
3324         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3325         struct ehea_port *port;
3326         int i;
3327         u32 logical_port_id;
3328
3329         sscanf(buf, "%d", &logical_port_id);
3330
3331         port = ehea_get_port(adapter, logical_port_id);
3332
3333         if (port) {
3334                 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3335                           logical_port_id);
3336
3337                 ehea_shutdown_single_port(port);
3338
3339                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3340                         if (adapter->port[i] == port) {
3341                                 adapter->port[i] = NULL;
3342                                 break;
3343                         }
3344         } else {
3345                 ehea_error("removing port with logical port id=%d failed. port "
3346                            "not configured.", logical_port_id);
3347                 return -EINVAL;
3348         }
3349
3350         ehea_remove_adapter_mr(adapter);
3351
3352         return (ssize_t) count;
3353 }
3354
3355 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3356 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3357
3358 int ehea_create_device_sysfs(struct of_device *dev)
3359 {
3360         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3361         if (ret)
3362                 goto out;
3363
3364         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3365 out:
3366         return ret;
3367 }
3368
3369 void ehea_remove_device_sysfs(struct of_device *dev)
3370 {
3371         device_remove_file(&dev->dev, &dev_attr_probe_port);
3372         device_remove_file(&dev->dev, &dev_attr_remove_port);
3373 }
3374
3375 static int __devinit ehea_probe_adapter(struct of_device *dev,
3376                                         const struct of_device_id *id)
3377 {
3378         struct ehea_adapter *adapter;
3379         const u64 *adapter_handle;
3380         int ret;
3381
3382         if (!dev || !dev->dev.of_node) {
3383                 ehea_error("Invalid ibmebus device probed");
3384                 return -EINVAL;
3385         }
3386
3387         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3388         if (!adapter) {
3389                 ret = -ENOMEM;
3390                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3391                 goto out;
3392         }
3393
3394         list_add(&adapter->list, &adapter_list);
3395
3396         adapter->ofdev = dev;
3397
3398         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3399                                          NULL);
3400         if (adapter_handle)
3401                 adapter->handle = *adapter_handle;
3402
3403         if (!adapter->handle) {
3404                 dev_err(&dev->dev, "failed getting handle for adapter"
3405                         " '%s'\n", dev->dev.of_node->full_name);
3406                 ret = -ENODEV;
3407                 goto out_free_ad;
3408         }
3409
3410         adapter->pd = EHEA_PD_ID;
3411
3412         dev_set_drvdata(&dev->dev, adapter);
3413
3414
3415         /* initialize adapter and ports */
3416         /* get adapter properties */
3417         ret = ehea_sense_adapter_attr(adapter);
3418         if (ret) {
3419                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3420                 goto out_free_ad;
3421         }
3422
3423         adapter->neq = ehea_create_eq(adapter,
3424                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3425         if (!adapter->neq) {
3426                 ret = -EIO;
3427                 dev_err(&dev->dev, "NEQ creation failed\n");
3428                 goto out_free_ad;
3429         }
3430
3431         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3432                      (unsigned long)adapter);
3433
3434         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3435                                   ehea_interrupt_neq, IRQF_DISABLED,
3436                                   "ehea_neq", adapter);
3437         if (ret) {
3438                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3439                 goto out_kill_eq;
3440         }
3441
3442         ret = ehea_create_device_sysfs(dev);
3443         if (ret)
3444                 goto out_free_irq;
3445
3446         ret = ehea_setup_ports(adapter);
3447         if (ret) {
3448                 dev_err(&dev->dev, "setup_ports failed\n");
3449                 goto out_rem_dev_sysfs;
3450         }
3451
3452         ret = 0;
3453         goto out;
3454
3455 out_rem_dev_sysfs:
3456         ehea_remove_device_sysfs(dev);
3457
3458 out_free_irq:
3459         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3460
3461 out_kill_eq:
3462         ehea_destroy_eq(adapter->neq);
3463
3464 out_free_ad:
3465         list_del(&adapter->list);
3466         kfree(adapter);
3467
3468 out:
3469         ehea_update_firmware_handles();
3470
3471         return ret;
3472 }
3473
3474 static int __devexit ehea_remove(struct of_device *dev)
3475 {
3476         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3477         int i;
3478
3479         for (i = 0; i < EHEA_MAX_PORTS; i++)
3480                 if (adapter->port[i]) {
3481                         ehea_shutdown_single_port(adapter->port[i]);
3482                         adapter->port[i] = NULL;
3483                 }
3484
3485         ehea_remove_device_sysfs(dev);
3486
3487         flush_scheduled_work();
3488
3489         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3490         tasklet_kill(&adapter->neq_tasklet);
3491
3492         ehea_destroy_eq(adapter->neq);
3493         ehea_remove_adapter_mr(adapter);
3494         list_del(&adapter->list);
3495         kfree(adapter);
3496
3497         ehea_update_firmware_handles();
3498
3499         return 0;
3500 }
3501
3502 void ehea_crash_handler(void)
3503 {
3504         int i;
3505
3506         if (ehea_fw_handles.arr)
3507                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3508                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3509                                              ehea_fw_handles.arr[i].fwh,
3510                                              FORCE_FREE);
3511
3512         if (ehea_bcmc_regs.arr)
3513                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3514                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3515                                               ehea_bcmc_regs.arr[i].port_id,
3516                                               ehea_bcmc_regs.arr[i].reg_type,
3517                                               ehea_bcmc_regs.arr[i].macaddr,
3518                                               0, H_DEREG_BCMC);
3519 }
3520
3521 static int ehea_mem_notifier(struct notifier_block *nb,
3522                              unsigned long action, void *data)
3523 {
3524         struct memory_notify *arg = data;
3525         switch (action) {
3526         case MEM_CANCEL_OFFLINE:
3527                 ehea_info("memory offlining canceled");
3528                 /* Readd canceled memory block */
3529         case MEM_ONLINE:
3530                 ehea_info("memory is going online");
3531                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3532                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3533                         return NOTIFY_BAD;
3534                 ehea_rereg_mrs(NULL);
3535                 break;
3536         case MEM_GOING_OFFLINE:
3537                 ehea_info("memory is going offline");
3538                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3539                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3540                         return NOTIFY_BAD;
3541                 ehea_rereg_mrs(NULL);
3542                 break;
3543         default:
3544                 break;
3545         }
3546
3547         ehea_update_firmware_handles();
3548
3549         return NOTIFY_OK;
3550 }
3551
3552 static struct notifier_block ehea_mem_nb = {
3553         .notifier_call = ehea_mem_notifier,
3554 };
3555
3556 static int ehea_reboot_notifier(struct notifier_block *nb,
3557                                 unsigned long action, void *unused)
3558 {
3559         if (action == SYS_RESTART) {
3560                 ehea_info("Reboot: freeing all eHEA resources");
3561                 ibmebus_unregister_driver(&ehea_driver);
3562         }
3563         return NOTIFY_DONE;
3564 }
3565
3566 static struct notifier_block ehea_reboot_nb = {
3567         .notifier_call = ehea_reboot_notifier,
3568 };
3569
3570 static int check_module_parm(void)
3571 {
3572         int ret = 0;
3573
3574         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3575             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3576                 ehea_info("Bad parameter: rq1_entries");
3577                 ret = -EINVAL;
3578         }
3579         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3580             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3581                 ehea_info("Bad parameter: rq2_entries");
3582                 ret = -EINVAL;
3583         }
3584         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3585             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3586                 ehea_info("Bad parameter: rq3_entries");
3587                 ret = -EINVAL;
3588         }
3589         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3590             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3591                 ehea_info("Bad parameter: sq_entries");
3592                 ret = -EINVAL;
3593         }
3594
3595         return ret;
3596 }
3597
3598 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3599                                       char *buf)
3600 {
3601         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3602 }
3603
3604 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3605                    ehea_show_capabilities, NULL);
3606
3607 int __init ehea_module_init(void)
3608 {
3609         int ret;
3610
3611         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3612                DRV_VERSION);
3613
3614
3615         INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3616         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3617         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3618
3619         mutex_init(&ehea_fw_handles.lock);
3620         spin_lock_init(&ehea_bcmc_regs.lock);
3621
3622         ret = check_module_parm();
3623         if (ret)
3624                 goto out;
3625
3626         ret = ehea_create_busmap();
3627         if (ret)
3628                 goto out;
3629
3630         ret = register_reboot_notifier(&ehea_reboot_nb);
3631         if (ret)
3632                 ehea_info("failed registering reboot notifier");
3633
3634         ret = register_memory_notifier(&ehea_mem_nb);
3635         if (ret)
3636                 ehea_info("failed registering memory remove notifier");
3637
3638         ret = crash_shutdown_register(&ehea_crash_handler);
3639         if (ret)
3640                 ehea_info("failed registering crash handler");
3641
3642         ret = ibmebus_register_driver(&ehea_driver);
3643         if (ret) {
3644                 ehea_error("failed registering eHEA device driver on ebus");
3645                 goto out2;
3646         }
3647
3648         ret = driver_create_file(&ehea_driver.driver,
3649                                  &driver_attr_capabilities);
3650         if (ret) {
3651                 ehea_error("failed to register capabilities attribute, ret=%d",
3652                            ret);
3653                 goto out3;
3654         }
3655
3656         return ret;
3657
3658 out3:
3659         ibmebus_unregister_driver(&ehea_driver);
3660 out2:
3661         unregister_memory_notifier(&ehea_mem_nb);
3662         unregister_reboot_notifier(&ehea_reboot_nb);
3663         crash_shutdown_unregister(&ehea_crash_handler);
3664 out:
3665         return ret;
3666 }
3667
3668 static void __exit ehea_module_exit(void)
3669 {
3670         int ret;
3671
3672         flush_scheduled_work();
3673         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3674         ibmebus_unregister_driver(&ehea_driver);
3675         unregister_reboot_notifier(&ehea_reboot_nb);
3676         ret = crash_shutdown_unregister(&ehea_crash_handler);
3677         if (ret)
3678                 ehea_info("failed unregistering crash handler");
3679         unregister_memory_notifier(&ehea_mem_nb);
3680         kfree(ehea_fw_handles.arr);
3681         kfree(ehea_bcmc_regs.arr);
3682         ehea_destroy_busmap();
3683 }
3684
3685 module_init(ehea_module_init);
3686 module_exit(ehea_module_exit);