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   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include <linux/in.h>
  30 #include <linux/ip.h>
  31 #include <linux/tcp.h>
  32 #include <linux/udp.h>
  33 #include <linux/if.h>
  34 #include <linux/list.h>
  35 #include <linux/if_ether.h>
  36 #include <linux/notifier.h>
  37 #include <linux/reboot.h>
  38 #include <linux/memory.h>
  39 #include <asm/kexec.h>
  40 #include <linux/mutex.h>
  41
  42 #include <net/ip.h>
  43
  44 #include "ehea.h"
  45 #include "ehea_qmr.h"
  46 #include "ehea_phyp.h"
  47
  48
  49 MODULE_LICENSE("GPL");
  50 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  51 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  52 MODULE_VERSION(DRV_VERSION);
  53
  54
  55 static int msg_level = -1;
  56 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  57 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  58 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  59 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  60 static int use_mcs;
  61 static int use_lro;
  62 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  63 static int num_tx_qps = EHEA_NUM_TX_QP;
  64 static int prop_carrier_state;
  65
  66 module_param(msg_level, int, 0);
  67 module_param(rq1_entries, int, 0);
  68 module_param(rq2_entries, int, 0);
  69 module_param(rq3_entries, int, 0);
  70 module_param(sq_entries, int, 0);
  71 module_param(prop_carrier_state, int, 0);
  72 module_param(use_mcs, int, 0);
  73 module_param(use_lro, int, 0);
  74 module_param(lro_max_aggr, int, 0);
  75 module_param(num_tx_qps, int, 0);
  76
  77 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
  78 MODULE_PARM_DESC(msg_level, "msg_level");
  79 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  80                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  81 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  82                  "[2^x - 1], x = [6..14]. Default = "
  83                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  84 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  85                  "[2^x - 1], x = [6..14]. Default = "
  86                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  87 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  88                  "[2^x - 1], x = [6..14]. Default = "
  89                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  90 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  91                  "[2^x - 1], x = [6..14]. Default = "
  92                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  93 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
  94
  95 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
  96                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
  97 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
  98                  "Default = 0");
  99
 100 static int port_name_cnt;
 101 static LIST_HEAD(adapter_list);
 102 static unsigned long ehea_driver_flags;
 103 struct work_struct ehea_rereg_mr_task;
 104 static DEFINE_MUTEX(dlpar_mem_lock);
 105 struct ehea_fw_handle_array ehea_fw_handles;
 106 struct ehea_bcmc_reg_array ehea_bcmc_regs;
 107
 108
 109 static int __devinit ehea_probe_adapter(struct of_device *dev,
 110                                         const struct of_device_id *id);
 111
 112 static int __devexit ehea_remove(struct of_device *dev);
 113
 114 static struct of_device_id ehea_device_table[] = {
 115         {
 116                 .name = "lhea",
 117                 .compatible = "IBM,lhea",
 118         },
 119         {},
 120 };
 121 MODULE_DEVICE_TABLE(of, ehea_device_table);
 122
 123 static struct of_platform_driver ehea_driver = {
 124         .name = "ehea",
 125         .match_table = ehea_device_table,
 126         .probe = ehea_probe_adapter,
 127         .remove = ehea_remove,
 128 };
 129
 130 void ehea_dump(void *adr, int len, char *msg)
 131 {
 132         int x;
 133         unsigned char *deb = adr;
 134         for (x = 0; x < len; x += 16) {
 135                 printk(DRV_NAME " %s adr=%p ofs=%04x %016llx %016llx\n", msg,
 136                           deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 137                 deb += 16;
 138         }
 139 }
 140
 141 void ehea_schedule_port_reset(struct ehea_port *port)
 142 {
 143         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 144                 schedule_work(&port->reset_task);
 145 }
 146
 147 static void ehea_update_firmware_handles(void)
 148 {
 149         struct ehea_fw_handle_entry *arr = NULL;
 150         struct ehea_adapter *adapter;
 151         int num_adapters = 0;
 152         int num_ports = 0;
 153         int num_portres = 0;
 154         int i = 0;
 155         int num_fw_handles, k, l;
 156
 157         /* Determine number of handles */
 158         mutex_lock(&ehea_fw_handles.lock);
 159
 160         list_for_each_entry(adapter, &adapter_list, list) {
 161                 num_adapters++;
 162
 163                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 164                         struct ehea_port *port = adapter->port[k];
 165
 166                         if (!port || (port->state != EHEA_PORT_UP))
 167                                 continue;
 168
 169                         num_ports++;
 170                         num_portres += port->num_def_qps + port->num_add_tx_qps;
 171                 }
 172         }
 173
 174         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 175                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 176                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 177
 178         if (num_fw_handles) {
 179                 arr = kzalloc(num_fw_handles * sizeof(*arr), GFP_KERNEL);
 180                 if (!arr)
 181                         goto out;  /* Keep the existing array */
 182         } else
 183                 goto out_update;
 184
 185         list_for_each_entry(adapter, &adapter_list, list) {
 186                 if (num_adapters == 0)
 187                         break;
 188
 189                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 190                         struct ehea_port *port = adapter->port[k];
 191
 192                         if (!port || (port->state != EHEA_PORT_UP)
 193                                 || (num_ports == 0))
 194                                 continue;
 195
 196                         for (l = 0;
 197                              l < port->num_def_qps + port->num_add_tx_qps;
 198                              l++) {
 199                                 struct ehea_port_res *pr = &port->port_res[l];
 200
 201                                 arr[i].adh = adapter->handle;
 202                                 arr[i++].fwh = pr->qp->fw_handle;
 203                                 arr[i].adh = adapter->handle;
 204                                 arr[i++].fwh = pr->send_cq->fw_handle;
 205                                 arr[i].adh = adapter->handle;
 206                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 207                                 arr[i].adh = adapter->handle;
 208                                 arr[i++].fwh = pr->eq->fw_handle;
 209                                 arr[i].adh = adapter->handle;
 210                                 arr[i++].fwh = pr->send_mr.handle;
 211                                 arr[i].adh = adapter->handle;
 212                                 arr[i++].fwh = pr->recv_mr.handle;
 213                         }
 214                         arr[i].adh = adapter->handle;
 215                         arr[i++].fwh = port->qp_eq->fw_handle;
 216                         num_ports--;
 217                 }
 218
 219                 arr[i].adh = adapter->handle;
 220                 arr[i++].fwh = adapter->neq->fw_handle;
 221
 222                 if (adapter->mr.handle) {
 223                         arr[i].adh = adapter->handle;
 224                         arr[i++].fwh = adapter->mr.handle;
 225                 }
 226                 num_adapters--;
 227         }
 228
 229 out_update:
 230         kfree(ehea_fw_handles.arr);
 231         ehea_fw_handles.arr = arr;
 232         ehea_fw_handles.num_entries = i;
 233 out:
 234         mutex_unlock(&ehea_fw_handles.lock);
 235 }
 236
 237 static void ehea_update_bcmc_registrations(void)
 238 {
 239         unsigned long flags;
 240         struct ehea_bcmc_reg_entry *arr = NULL;
 241         struct ehea_adapter *adapter;
 242         struct ehea_mc_list *mc_entry;
 243         int num_registrations = 0;
 244         int i = 0;
 245         int k;
 246
 247         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 248
 249         /* Determine number of registrations */
 250         list_for_each_entry(adapter, &adapter_list, list)
 251                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 252                         struct ehea_port *port = adapter->port[k];
 253
 254                         if (!port || (port->state != EHEA_PORT_UP))
 255                                 continue;
 256
 257                         num_registrations += 2; /* Broadcast registrations */
 258
 259                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 260                                 num_registrations += 2;
 261                 }
 262
 263         if (num_registrations) {
 264                 arr = kzalloc(num_registrations * sizeof(*arr), GFP_ATOMIC);
 265                 if (!arr)
 266                         goto out;  /* Keep the existing array */
 267         } else
 268                 goto out_update;
 269
 270         list_for_each_entry(adapter, &adapter_list, list) {
 271                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 272                         struct ehea_port *port = adapter->port[k];
 273
 274                         if (!port || (port->state != EHEA_PORT_UP))
 275                                 continue;
 276
 277                         if (num_registrations == 0)
 278                                 goto out_update;
 279
 280                         arr[i].adh = adapter->handle;
 281                         arr[i].port_id = port->logical_port_id;
 282                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 283                                           EHEA_BCMC_UNTAGGED;
 284                         arr[i++].macaddr = port->mac_addr;
 285
 286                         arr[i].adh = adapter->handle;
 287                         arr[i].port_id = port->logical_port_id;
 288                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 289                                           EHEA_BCMC_VLANID_ALL;
 290                         arr[i++].macaddr = port->mac_addr;
 291                         num_registrations -= 2;
 292
 293                         list_for_each_entry(mc_entry,
 294                                             &port->mc_list->list, list) {
 295                                 if (num_registrations == 0)
 296                                         goto out_update;
 297
 298                                 arr[i].adh = adapter->handle;
 299                                 arr[i].port_id = port->logical_port_id;
 300                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 301                                                   EHEA_BCMC_MULTICAST |
 302                                                   EHEA_BCMC_UNTAGGED;
 303                                 arr[i++].macaddr = mc_entry->macaddr;
 304
 305                                 arr[i].adh = adapter->handle;
 306                                 arr[i].port_id = port->logical_port_id;
 307                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 308                                                   EHEA_BCMC_MULTICAST |
 309                                                   EHEA_BCMC_VLANID_ALL;
 310                                 arr[i++].macaddr = mc_entry->macaddr;
 311                                 num_registrations -= 2;
 312                         }
 313                 }
 314         }
 315
 316 out_update:
 317         kfree(ehea_bcmc_regs.arr);
 318         ehea_bcmc_regs.arr = arr;
 319         ehea_bcmc_regs.num_entries = i;
 320 out:
 321         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 322 }
 323
 324 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 325 {
 326         struct ehea_port *port = netdev_priv(dev);
 327         struct net_device_stats *stats = &port->stats;
 328         struct hcp_ehea_port_cb2 *cb2;
 329         u64 hret, rx_packets, tx_packets;
 330         int i;
 331
 332         memset(stats, 0, sizeof(*stats));
 333
 334         cb2 = (void *)get_zeroed_page(GFP_ATOMIC);
 335         if (!cb2) {
 336                 ehea_error("no mem for cb2");
 337                 goto out;
 338         }
 339
 340         hret = ehea_h_query_ehea_port(port->adapter->handle,
 341                                       port->logical_port_id,
 342                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 343         if (hret != H_SUCCESS) {
 344                 ehea_error("query_ehea_port failed");
 345                 goto out_herr;
 346         }
 347
 348         if (netif_msg_hw(port))
 349                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 350
 351         rx_packets = 0;
 352         for (i = 0; i < port->num_def_qps; i++)
 353                 rx_packets += port->port_res[i].rx_packets;
 354
 355         tx_packets = 0;
 356         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
 357                 tx_packets += port->port_res[i].tx_packets;
 358
 359         stats->tx_packets = tx_packets;
 360         stats->multicast = cb2->rxmcp;
 361         stats->rx_errors = cb2->rxuerr;
 362         stats->rx_bytes = cb2->rxo;
 363         stats->tx_bytes = cb2->txo;
 364         stats->rx_packets = rx_packets;
 365
 366 out_herr:
 367         free_page((unsigned long)cb2);
 368 out:
 369         return stats;
 370 }
 371
 372 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 373 {
 374         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 375         struct net_device *dev = pr->port->netdev;
 376         int max_index_mask = pr->rq1_skba.len - 1;
 377         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 378         int adder = 0;
 379         int i;
 380
 381         pr->rq1_skba.os_skbs = 0;
 382
 383         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 384                 if (nr_of_wqes > 0)
 385                         pr->rq1_skba.index = index;
 386                 pr->rq1_skba.os_skbs = fill_wqes;
 387                 return;
 388         }
 389
 390         for (i = 0; i < fill_wqes; i++) {
 391                 if (!skb_arr_rq1[index]) {
 392                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 393                                                               EHEA_L_PKT_SIZE);
 394                         if (!skb_arr_rq1[index]) {
 395                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 396                                 break;
 397                         }
 398                 }
 399                 index--;
 400                 index &= max_index_mask;
 401                 adder++;
 402         }
 403
 404         if (adder == 0)
 405                 return;
 406
 407         /* Ring doorbell */
 408         ehea_update_rq1a(pr->qp, adder);
 409 }
 410
 411 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 412 {
 413         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 414         struct net_device *dev = pr->port->netdev;
 415         int i;
 416
 417         for (i = 0; i < pr->rq1_skba.len; i++) {
 418                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 419                 if (!skb_arr_rq1[i])
 420                         break;
 421         }
 422         /* Ring doorbell */
 423         ehea_update_rq1a(pr->qp, nr_rq1a);
 424 }
 425
 426 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 427                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 428                               int num_wqes, int wqe_type, int packet_size)
 429 {
 430         struct net_device *dev = pr->port->netdev;
 431         struct ehea_qp *qp = pr->qp;
 432         struct sk_buff **skb_arr = q_skba->arr;
 433         struct ehea_rwqe *rwqe;
 434         int i, index, max_index_mask, fill_wqes;
 435         int adder = 0;
 436         int ret = 0;
 437
 438         fill_wqes = q_skba->os_skbs + num_wqes;
 439         q_skba->os_skbs = 0;
 440
 441         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 442                 q_skba->os_skbs = fill_wqes;
 443                 return ret;
 444         }
 445
 446         index = q_skba->index;
 447         max_index_mask = q_skba->len - 1;
 448         for (i = 0; i < fill_wqes; i++) {
 449                 u64 tmp_addr;
 450                 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
 451                 if (!skb) {
 452                         q_skba->os_skbs = fill_wqes - i;
 453                         if (q_skba->os_skbs == q_skba->len - 2) {
 454                                 ehea_info("%s: rq%i ran dry - no mem for skb",
 455                                           pr->port->netdev->name, rq_nr);
 456                                 ret = -ENOMEM;
 457                         }
 458                         break;
 459                 }
 460                 skb_reserve(skb, NET_IP_ALIGN);
 461
 462                 skb_arr[index] = skb;
 463                 tmp_addr = ehea_map_vaddr(skb->data);
 464                 if (tmp_addr == -1) {
 465                         dev_kfree_skb(skb);
 466                         q_skba->os_skbs = fill_wqes - i;
 467                         ret = 0;
 468                         break;
 469                 }
 470
 471                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 472                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 473                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 474                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 475                 rwqe->sg_list[0].vaddr = tmp_addr;
 476                 rwqe->sg_list[0].len = packet_size;
 477                 rwqe->data_segments = 1;
 478
 479                 index++;
 480                 index &= max_index_mask;
 481                 adder++;
 482         }
 483
 484         q_skba->index = index;
 485         if (adder == 0)
 486                 goto out;
 487
 488         /* Ring doorbell */
 489         iosync();
 490         if (rq_nr == 2)
 491                 ehea_update_rq2a(pr->qp, adder);
 492         else
 493                 ehea_update_rq3a(pr->qp, adder);
 494 out:
 495         return ret;
 496 }
 497
 498
 499 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 500 {
 501         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 502                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 503                                   EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
 504 }
 505
 506
 507 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 508 {
 509         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 510                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 511                                   EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
 512 }
 513
 514 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 515 {
 516         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 517         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 518                 return 0;
 519         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 520             (cqe->header_length == 0))
 521                 return 0;
 522         return -EINVAL;
 523 }
 524
 525 static inline void ehea_fill_skb(struct net_device *dev,
 526                                  struct sk_buff *skb, struct ehea_cqe *cqe)
 527 {
 528         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 529
 530         skb_put(skb, length);
 531         skb->ip_summed = CHECKSUM_UNNECESSARY;
 532         skb->protocol = eth_type_trans(skb, dev);
 533 }
 534
 535 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 536                                                int arr_len,
 537                                                struct ehea_cqe *cqe)
 538 {
 539         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 540         struct sk_buff *skb;
 541         void *pref;
 542         int x;
 543
 544         x = skb_index + 1;
 545         x &= (arr_len - 1);
 546
 547         pref = skb_array[x];
 548         if (pref) {
 549                 prefetchw(pref);
 550                 prefetchw(pref + EHEA_CACHE_LINE);
 551
 552                 pref = (skb_array[x]->data);
 553                 prefetch(pref);
 554                 prefetch(pref + EHEA_CACHE_LINE);
 555                 prefetch(pref + EHEA_CACHE_LINE * 2);
 556                 prefetch(pref + EHEA_CACHE_LINE * 3);
 557         }
 558
 559         skb = skb_array[skb_index];
 560         skb_array[skb_index] = NULL;
 561         return skb;
 562 }
 563
 564 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 565                                                   int arr_len, int wqe_index)
 566 {
 567         struct sk_buff *skb;
 568         void *pref;
 569         int x;
 570
 571         x = wqe_index + 1;
 572         x &= (arr_len - 1);
 573
 574         pref = skb_array[x];
 575         if (pref) {
 576                 prefetchw(pref);
 577                 prefetchw(pref + EHEA_CACHE_LINE);
 578
 579                 pref = (skb_array[x]->data);
 580                 prefetchw(pref);
 581                 prefetchw(pref + EHEA_CACHE_LINE);
 582         }
 583
 584         skb = skb_array[wqe_index];
 585         skb_array[wqe_index] = NULL;
 586         return skb;
 587 }
 588
 589 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 590                                  struct ehea_cqe *cqe, int *processed_rq2,
 591                                  int *processed_rq3)
 592 {
 593         struct sk_buff *skb;
 594
 595         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 596                 pr->p_stats.err_tcp_cksum++;
 597         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 598                 pr->p_stats.err_ip_cksum++;
 599         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 600                 pr->p_stats.err_frame_crc++;
 601
 602         if (rq == 2) {
 603                 *processed_rq2 += 1;
 604                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 605                 dev_kfree_skb(skb);
 606         } else if (rq == 3) {
 607                 *processed_rq3 += 1;
 608                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 609                 dev_kfree_skb(skb);
 610         }
 611
 612         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 613                 if (netif_msg_rx_err(pr->port)) {
 614                         ehea_error("Critical receive error for QP %d. "
 615                                    "Resetting port.", pr->qp->init_attr.qp_nr);
 616                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 617                 }
 618                 ehea_schedule_port_reset(pr->port);
 619                 return 1;
 620         }
 621
 622         return 0;
 623 }
 624
 625 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 626                        void **tcph, u64 *hdr_flags, void *priv)
 627 {
 628         struct ehea_cqe *cqe = priv;
 629         unsigned int ip_len;
 630         struct iphdr *iph;
 631
 632         /* non tcp/udp packets */
 633         if (!cqe->header_length)
 634                 return -1;
 635
 636         /* non tcp packet */
 637         skb_reset_network_header(skb);
 638         iph = ip_hdr(skb);
 639         if (iph->protocol != IPPROTO_TCP)
 640                 return -1;
 641
 642         ip_len = ip_hdrlen(skb);
 643         skb_set_transport_header(skb, ip_len);
 644         *tcph = tcp_hdr(skb);
 645
 646         /* check if ip header and tcp header are complete */
 647         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 648                 return -1;
 649
 650         *hdr_flags = LRO_IPV4 | LRO_TCP;
 651         *iphdr = iph;
 652
 653         return 0;
 654 }
 655
 656 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 657                           struct sk_buff *skb)
 658 {
 659         int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 660                 && pr->port->vgrp;
 661
 662         if (use_lro) {
 663                 if (vlan_extracted)
 664                         lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
 665                                                      pr->port->vgrp,
 666                                                      cqe->vlan_tag,
 667                                                      cqe);
 668                 else
 669                         lro_receive_skb(&pr->lro_mgr, skb, cqe);
 670         } else {
 671                 if (vlan_extracted)
 672                         vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
 673                                                  cqe->vlan_tag);
 674                 else
 675                         netif_receive_skb(skb);
 676         }
 677 }
 678
 679 static int ehea_proc_rwqes(struct net_device *dev,
 680                            struct ehea_port_res *pr,
 681                            int budget)
 682 {
 683         struct ehea_port *port = pr->port;
 684         struct ehea_qp *qp = pr->qp;
 685         struct ehea_cqe *cqe;
 686         struct sk_buff *skb;
 687         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 688         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 689         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 690         int skb_arr_rq1_len = pr->rq1_skba.len;
 691         int skb_arr_rq2_len = pr->rq2_skba.len;
 692         int skb_arr_rq3_len = pr->rq3_skba.len;
 693         int processed, processed_rq1, processed_rq2, processed_rq3;
 694         int wqe_index, last_wqe_index, rq, port_reset;
 695
 696         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 697         last_wqe_index = 0;
 698
 699         cqe = ehea_poll_rq1(qp, &wqe_index);
 700         while ((processed < budget) && cqe) {
 701                 ehea_inc_rq1(qp);
 702                 processed_rq1++;
 703                 processed++;
 704                 if (netif_msg_rx_status(port))
 705                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 706
 707                 last_wqe_index = wqe_index;
 708                 rmb();
 709                 if (!ehea_check_cqe(cqe, &rq)) {
 710                         if (rq == 1) {
 711                                 /* LL RQ1 */
 712                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 713                                                           skb_arr_rq1_len,
 714                                                           wqe_index);
 715                                 if (unlikely(!skb)) {
 716                                         if (netif_msg_rx_err(port))
 717                                                 ehea_error("LL rq1: skb=NULL");
 718
 719                                         skb = netdev_alloc_skb(dev,
 720                                                                EHEA_L_PKT_SIZE);
 721                                         if (!skb)
 722                                                 break;
 723                                 }
 724                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 725                                                  cqe->num_bytes_transfered - 4);
 726                                 ehea_fill_skb(dev, skb, cqe);
 727                         } else if (rq == 2) {
 728                                 /* RQ2 */
 729                                 skb = get_skb_by_index(skb_arr_rq2,
 730                                                        skb_arr_rq2_len, cqe);
 731                                 if (unlikely(!skb)) {
 732                                         if (netif_msg_rx_err(port))
 733                                                 ehea_error("rq2: skb=NULL");
 734                                         break;
 735                                 }
 736                                 ehea_fill_skb(dev, skb, cqe);
 737                                 processed_rq2++;
 738                         } else {
 739                                 /* RQ3 */
 740                                 skb = get_skb_by_index(skb_arr_rq3,
 741                                                        skb_arr_rq3_len, cqe);
 742                                 if (unlikely(!skb)) {
 743                                         if (netif_msg_rx_err(port))
 744                                                 ehea_error("rq3: skb=NULL");
 745                                         break;
 746                                 }
 747                                 ehea_fill_skb(dev, skb, cqe);
 748                                 processed_rq3++;
 749                         }
 750
 751                         ehea_proc_skb(pr, cqe, skb);
 752                 } else {
 753                         pr->p_stats.poll_receive_errors++;
 754                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 755                                                            &processed_rq2,
 756                                                            &processed_rq3);
 757                         if (port_reset)
 758                                 break;
 759                 }
 760                 cqe = ehea_poll_rq1(qp, &wqe_index);
 761         }
 762         if (use_lro)
 763                 lro_flush_all(&pr->lro_mgr);
 764
 765         pr->rx_packets += processed;
 766
 767         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 768         ehea_refill_rq2(pr, processed_rq2);
 769         ehea_refill_rq3(pr, processed_rq3);
 770
 771         return processed;
 772 }
 773
 774 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 775 {
 776         struct sk_buff *skb;
 777         struct ehea_cq *send_cq = pr->send_cq;
 778         struct ehea_cqe *cqe;
 779         int quota = my_quota;
 780         int cqe_counter = 0;
 781         int swqe_av = 0;
 782         int index;
 783         unsigned long flags;
 784
 785         cqe = ehea_poll_cq(send_cq);
 786         while (cqe && (quota > 0)) {
 787                 ehea_inc_cq(send_cq);
 788
 789                 cqe_counter++;
 790                 rmb();
 791                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 792                         ehea_error("Send Completion Error: Resetting port");
 793                         if (netif_msg_tx_err(pr->port))
 794                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 795                         ehea_schedule_port_reset(pr->port);
 796                         break;
 797                 }
 798
 799                 if (netif_msg_tx_done(pr->port))
 800                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 801
 802                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 803                            == EHEA_SWQE2_TYPE)) {
 804
 805                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 806                         skb = pr->sq_skba.arr[index];
 807                         dev_kfree_skb(skb);
 808                         pr->sq_skba.arr[index] = NULL;
 809                 }
 810
 811                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 812                 quota--;
 813
 814                 cqe = ehea_poll_cq(send_cq);
 815         };
 816
 817         ehea_update_feca(send_cq, cqe_counter);
 818         atomic_add(swqe_av, &pr->swqe_avail);
 819
 820         spin_lock_irqsave(&pr->netif_queue, flags);
 821
 822         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 823                                   >= pr->swqe_refill_th)) {
 824                 netif_wake_queue(pr->port->netdev);
 825                 pr->queue_stopped = 0;
 826         }
 827         spin_unlock_irqrestore(&pr->netif_queue, flags);
 828
 829         return cqe;
 830 }
 831
 832 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 833 #define EHEA_POLL_MAX_CQES 65535
 834
 835 static int ehea_poll(struct napi_struct *napi, int budget)
 836 {
 837         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 838                                                 napi);
 839         struct net_device *dev = pr->port->netdev;
 840         struct ehea_cqe *cqe;
 841         struct ehea_cqe *cqe_skb = NULL;
 842         int force_irq, wqe_index;
 843         int rx = 0;
 844
 845         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 846         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 847
 848         if (!force_irq)
 849                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 850
 851         while ((rx != budget) || force_irq) {
 852                 pr->poll_counter = 0;
 853                 force_irq = 0;
 854                 napi_complete(napi);
 855                 ehea_reset_cq_ep(pr->recv_cq);
 856                 ehea_reset_cq_ep(pr->send_cq);
 857                 ehea_reset_cq_n1(pr->recv_cq);
 858                 ehea_reset_cq_n1(pr->send_cq);
 859                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 860                 cqe_skb = ehea_poll_cq(pr->send_cq);
 861
 862                 if (!cqe && !cqe_skb)
 863                         return rx;
 864
 865                 if (!napi_reschedule(napi))
 866                         return rx;
 867
 868                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 869                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 870         }
 871
 872         pr->poll_counter++;
 873         return rx;
 874 }
 875
 876 #ifdef CONFIG_NET_POLL_CONTROLLER
 877 static void ehea_netpoll(struct net_device *dev)
 878 {
 879         struct ehea_port *port = netdev_priv(dev);
 880         int i;
 881
 882         for (i = 0; i < port->num_def_qps; i++)
 883                 napi_schedule(&port->port_res[i].napi);
 884 }
 885 #endif
 886
 887 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 888 {
 889         struct ehea_port_res *pr = param;
 890
 891         napi_schedule(&pr->napi);
 892
 893         return IRQ_HANDLED;
 894 }
 895
 896 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 897 {
 898         struct ehea_port *port = param;
 899         struct ehea_eqe *eqe;
 900         struct ehea_qp *qp;
 901         u32 qp_token;
 902
 903         eqe = ehea_poll_eq(port->qp_eq);
 904
 905         while (eqe) {
 906                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 907                 ehea_error("QP aff_err: entry=0x%llx, token=0x%x",
 908                            eqe->entry, qp_token);
 909
 910                 qp = port->port_res[qp_token].qp;
 911                 ehea_error_data(port->adapter, qp->fw_handle);
 912                 eqe = ehea_poll_eq(port->qp_eq);
 913         }
 914
 915         ehea_schedule_port_reset(port);
 916
 917         return IRQ_HANDLED;
 918 }
 919
 920 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 921                                        int logical_port)
 922 {
 923         int i;
 924
 925         for (i = 0; i < EHEA_MAX_PORTS; i++)
 926                 if (adapter->port[i])
 927                         if (adapter->port[i]->logical_port_id == logical_port)
 928                                 return adapter->port[i];
 929         return NULL;
 930 }
 931
 932 int ehea_sense_port_attr(struct ehea_port *port)
 933 {
 934         int ret;
 935         u64 hret;
 936         struct hcp_ehea_port_cb0 *cb0;
 937
 938         /* may be called via ehea_neq_tasklet() */
 939         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 940         if (!cb0) {
 941                 ehea_error("no mem for cb0");
 942                 ret = -ENOMEM;
 943                 goto out;
 944         }
 945
 946         hret = ehea_h_query_ehea_port(port->adapter->handle,
 947                                       port->logical_port_id, H_PORT_CB0,
 948                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 949                                       cb0);
 950         if (hret != H_SUCCESS) {
 951                 ret = -EIO;
 952                 goto out_free;
 953         }
 954
 955         /* MAC address */
 956         port->mac_addr = cb0->port_mac_addr << 16;
 957
 958         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
 959                 ret = -EADDRNOTAVAIL;
 960                 goto out_free;
 961         }
 962
 963         /* Port speed */
 964         switch (cb0->port_speed) {
 965         case H_SPEED_10M_H:
 966                 port->port_speed = EHEA_SPEED_10M;
 967                 port->full_duplex = 0;
 968                 break;
 969         case H_SPEED_10M_F:
 970                 port->port_speed = EHEA_SPEED_10M;
 971                 port->full_duplex = 1;
 972                 break;
 973         case H_SPEED_100M_H:
 974                 port->port_speed = EHEA_SPEED_100M;
 975                 port->full_duplex = 0;
 976                 break;
 977         case H_SPEED_100M_F:
 978                 port->port_speed = EHEA_SPEED_100M;
 979                 port->full_duplex = 1;
 980                 break;
 981         case H_SPEED_1G_F:
 982                 port->port_speed = EHEA_SPEED_1G;
 983                 port->full_duplex = 1;
 984                 break;
 985         case H_SPEED_10G_F:
 986                 port->port_speed = EHEA_SPEED_10G;
 987                 port->full_duplex = 1;
 988                 break;
 989         default:
 990                 port->port_speed = 0;
 991                 port->full_duplex = 0;
 992                 break;
 993         }
 994
 995         port->autoneg = 1;
 996         port->num_mcs = cb0->num_default_qps;
 997
 998         /* Number of default QPs */
 999         if (use_mcs)
1000                 port->num_def_qps = cb0->num_default_qps;
1001         else
1002                 port->num_def_qps = 1;
1003
1004         if (!port->num_def_qps) {
1005                 ret = -EINVAL;
1006                 goto out_free;
1007         }
1008
1009         port->num_tx_qps = num_tx_qps;
1010
1011         if (port->num_def_qps >= port->num_tx_qps)
1012                 port->num_add_tx_qps = 0;
1013         else
1014                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
1015
1016         ret = 0;
1017 out_free:
1018         if (ret || netif_msg_probe(port))
1019                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1020         free_page((unsigned long)cb0);
1021 out:
1022         return ret;
1023 }
1024
1025 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1026 {
1027         struct hcp_ehea_port_cb4 *cb4;
1028         u64 hret;
1029         int ret = 0;
1030
1031         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1032         if (!cb4) {
1033                 ehea_error("no mem for cb4");
1034                 ret = -ENOMEM;
1035                 goto out;
1036         }
1037
1038         cb4->port_speed = port_speed;
1039
1040         netif_carrier_off(port->netdev);
1041
1042         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1043                                        port->logical_port_id,
1044                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1045         if (hret == H_SUCCESS) {
1046                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1047
1048                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1049                                               port->logical_port_id,
1050                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1051                                               cb4);
1052                 if (hret == H_SUCCESS) {
1053                         switch (cb4->port_speed) {
1054                         case H_SPEED_10M_H:
1055                                 port->port_speed = EHEA_SPEED_10M;
1056                                 port->full_duplex = 0;
1057                                 break;
1058                         case H_SPEED_10M_F:
1059                                 port->port_speed = EHEA_SPEED_10M;
1060                                 port->full_duplex = 1;
1061                                 break;
1062                         case H_SPEED_100M_H:
1063                                 port->port_speed = EHEA_SPEED_100M;
1064                                 port->full_duplex = 0;
1065                                 break;
1066                         case H_SPEED_100M_F:
1067                                 port->port_speed = EHEA_SPEED_100M;
1068                                 port->full_duplex = 1;
1069                                 break;
1070                         case H_SPEED_1G_F:
1071                                 port->port_speed = EHEA_SPEED_1G;
1072                                 port->full_duplex = 1;
1073                                 break;
1074                         case H_SPEED_10G_F:
1075                                 port->port_speed = EHEA_SPEED_10G;
1076                                 port->full_duplex = 1;
1077                                 break;
1078                         default:
1079                                 port->port_speed = 0;
1080                                 port->full_duplex = 0;
1081                                 break;
1082                         }
1083                 } else {
1084                         ehea_error("Failed sensing port speed");
1085                         ret = -EIO;
1086                 }
1087         } else {
1088                 if (hret == H_AUTHORITY) {
1089                         ehea_info("Hypervisor denied setting port speed");
1090                         ret = -EPERM;
1091                 } else {
1092                         ret = -EIO;
1093                         ehea_error("Failed setting port speed");
1094                 }
1095         }
1096         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1097                 netif_carrier_on(port->netdev);
1098
1099         free_page((unsigned long)cb4);
1100 out:
1101         return ret;
1102 }
1103
1104 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1105 {
1106         int ret;
1107         u8 ec;
1108         u8 portnum;
1109         struct ehea_port *port;
1110
1111         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1112         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1113         port = ehea_get_port(adapter, portnum);
1114
1115         switch (ec) {
1116         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1117
1118                 if (!port) {
1119                         ehea_error("unknown portnum %x", portnum);
1120                         break;
1121                 }
1122
1123                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1124                         if (!netif_carrier_ok(port->netdev)) {
1125                                 ret = ehea_sense_port_attr(port);
1126                                 if (ret) {
1127                                         ehea_error("failed resensing port "
1128                                                    "attributes");
1129                                         break;
1130                                 }
1131
1132                                 if (netif_msg_link(port))
1133                                         ehea_info("%s: Logical port up: %dMbps "
1134                                                   "%s Duplex",
1135                                                   port->netdev->name,
1136                                                   port->port_speed,
1137                                                   port->full_duplex ==
1138                                                   1 ? "Full" : "Half");
1139
1140                                 netif_carrier_on(port->netdev);
1141                                 netif_wake_queue(port->netdev);
1142                         }
1143                 } else
1144                         if (netif_carrier_ok(port->netdev)) {
1145                                 if (netif_msg_link(port))
1146                                         ehea_info("%s: Logical port down",
1147                                                   port->netdev->name);
1148                                 netif_carrier_off(port->netdev);
1149                                 netif_stop_queue(port->netdev);
1150                         }
1151
1152                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1153                         port->phy_link = EHEA_PHY_LINK_UP;
1154                         if (netif_msg_link(port))
1155                                 ehea_info("%s: Physical port up",
1156                                           port->netdev->name);
1157                         if (prop_carrier_state)
1158                                 netif_carrier_on(port->netdev);
1159                 } else {
1160                         port->phy_link = EHEA_PHY_LINK_DOWN;
1161                         if (netif_msg_link(port))
1162                                 ehea_info("%s: Physical port down",
1163                                           port->netdev->name);
1164                         if (prop_carrier_state)
1165                                 netif_carrier_off(port->netdev);
1166                 }
1167
1168                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1169                         ehea_info("External switch port is primary port");
1170                 else
1171                         ehea_info("External switch port is backup port");
1172
1173                 break;
1174         case EHEA_EC_ADAPTER_MALFUNC:
1175                 ehea_error("Adapter malfunction");
1176                 break;
1177         case EHEA_EC_PORT_MALFUNC:
1178                 ehea_info("Port malfunction: Device: %s", port->netdev->name);
1179                 netif_carrier_off(port->netdev);
1180                 netif_stop_queue(port->netdev);
1181                 break;
1182         default:
1183                 ehea_error("unknown event code %x, eqe=0x%llX", ec, eqe);
1184                 break;
1185         }
1186 }
1187
1188 static void ehea_neq_tasklet(unsigned long data)
1189 {
1190         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1191         struct ehea_eqe *eqe;
1192         u64 event_mask;
1193
1194         eqe = ehea_poll_eq(adapter->neq);
1195         ehea_debug("eqe=%p", eqe);
1196
1197         while (eqe) {
1198                 ehea_debug("*eqe=%lx", eqe->entry);
1199                 ehea_parse_eqe(adapter, eqe->entry);
1200                 eqe = ehea_poll_eq(adapter->neq);
1201                 ehea_debug("next eqe=%p", eqe);
1202         }
1203
1204         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1205                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1206                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1207
1208         ehea_h_reset_events(adapter->handle,
1209                             adapter->neq->fw_handle, event_mask);
1210 }
1211
1212 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1213 {
1214         struct ehea_adapter *adapter = param;
1215         tasklet_hi_schedule(&adapter->neq_tasklet);
1216         return IRQ_HANDLED;
1217 }
1218
1219
1220 static int ehea_fill_port_res(struct ehea_port_res *pr)
1221 {
1222         int ret;
1223         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1224
1225         ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1226                                - init_attr->act_nr_rwqes_rq2
1227                                - init_attr->act_nr_rwqes_rq3 - 1);
1228
1229         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1230
1231         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1232
1233         return ret;
1234 }
1235
1236 static int ehea_reg_interrupts(struct net_device *dev)
1237 {
1238         struct ehea_port *port = netdev_priv(dev);
1239         struct ehea_port_res *pr;
1240         int i, ret;
1241
1242
1243         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1244                  dev->name);
1245
1246         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1247                                   ehea_qp_aff_irq_handler,
1248                                   IRQF_DISABLED, port->int_aff_name, port);
1249         if (ret) {
1250                 ehea_error("failed registering irq for qp_aff_irq_handler:"
1251                            "ist=%X", port->qp_eq->attr.ist1);
1252                 goto out_free_qpeq;
1253         }
1254
1255         if (netif_msg_ifup(port))
1256                 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1257                           "registered", port->qp_eq->attr.ist1);
1258
1259
1260         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1261                 pr = &port->port_res[i];
1262                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1263                          "%s-queue%d", dev->name, i);
1264                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1265                                           ehea_recv_irq_handler,
1266                                           IRQF_DISABLED, pr->int_send_name,
1267                                           pr);
1268                 if (ret) {
1269                         ehea_error("failed registering irq for ehea_queue "
1270                                    "port_res_nr:%d, ist=%X", i,
1271                                    pr->eq->attr.ist1);
1272                         goto out_free_req;
1273                 }
1274                 if (netif_msg_ifup(port))
1275                         ehea_info("irq_handle 0x%X for function ehea_queue_int "
1276                                   "%d registered", pr->eq->attr.ist1, i);
1277         }
1278 out:
1279         return ret;
1280
1281
1282 out_free_req:
1283         while (--i >= 0) {
1284                 u32 ist = port->port_res[i].eq->attr.ist1;
1285                 ibmebus_free_irq(ist, &port->port_res[i]);
1286         }
1287
1288 out_free_qpeq:
1289         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1290         i = port->num_def_qps;
1291
1292         goto out;
1293
1294 }
1295
1296 static void ehea_free_interrupts(struct net_device *dev)
1297 {
1298         struct ehea_port *port = netdev_priv(dev);
1299         struct ehea_port_res *pr;
1300         int i;
1301
1302         /* send */
1303
1304         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1305                 pr = &port->port_res[i];
1306                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1307                 if (netif_msg_intr(port))
1308                         ehea_info("free send irq for res %d with handle 0x%X",
1309                                   i, pr->eq->attr.ist1);
1310         }
1311
1312         /* associated events */
1313         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1314         if (netif_msg_intr(port))
1315                 ehea_info("associated event interrupt for handle 0x%X freed",
1316                           port->qp_eq->attr.ist1);
1317 }
1318
1319 static int ehea_configure_port(struct ehea_port *port)
1320 {
1321         int ret, i;
1322         u64 hret, mask;
1323         struct hcp_ehea_port_cb0 *cb0;
1324
1325         ret = -ENOMEM;
1326         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1327         if (!cb0)
1328                 goto out;
1329
1330         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1331                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1332                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1333                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1334                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1335                                       PXLY_RC_VLAN_FILTER)
1336                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1337
1338         for (i = 0; i < port->num_mcs; i++)
1339                 if (use_mcs)
1340                         cb0->default_qpn_arr[i] =
1341                                 port->port_res[i].qp->init_attr.qp_nr;
1342                 else
1343                         cb0->default_qpn_arr[i] =
1344                                 port->port_res[0].qp->init_attr.qp_nr;
1345
1346         if (netif_msg_ifup(port))
1347                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1348
1349         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1350              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1351
1352         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1353                                        port->logical_port_id,
1354                                        H_PORT_CB0, mask, cb0);
1355         ret = -EIO;
1356         if (hret != H_SUCCESS)
1357                 goto out_free;
1358
1359         ret = 0;
1360
1361 out_free:
1362         free_page((unsigned long)cb0);
1363 out:
1364         return ret;
1365 }
1366
1367 int ehea_gen_smrs(struct ehea_port_res *pr)
1368 {
1369         int ret;
1370         struct ehea_adapter *adapter = pr->port->adapter;
1371
1372         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1373         if (ret)
1374                 goto out;
1375
1376         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1377         if (ret)
1378                 goto out_free;
1379
1380         return 0;
1381
1382 out_free:
1383         ehea_rem_mr(&pr->send_mr);
1384 out:
1385         ehea_error("Generating SMRS failed\n");
1386         return -EIO;
1387 }
1388
1389 int ehea_rem_smrs(struct ehea_port_res *pr)
1390 {
1391         if ((ehea_rem_mr(&pr->send_mr))
1392             || (ehea_rem_mr(&pr->recv_mr)))
1393                 return -EIO;
1394         else
1395                 return 0;
1396 }
1397
1398 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1399 {
1400         int arr_size = sizeof(void *) * max_q_entries;
1401
1402         q_skba->arr = vmalloc(arr_size);
1403         if (!q_skba->arr)
1404                 return -ENOMEM;
1405
1406         memset(q_skba->arr, 0, arr_size);
1407
1408         q_skba->len = max_q_entries;
1409         q_skba->index = 0;
1410         q_skba->os_skbs = 0;
1411
1412         return 0;
1413 }
1414
1415 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1416                               struct port_res_cfg *pr_cfg, int queue_token)
1417 {
1418         struct ehea_adapter *adapter = port->adapter;
1419         enum ehea_eq_type eq_type = EHEA_EQ;
1420         struct ehea_qp_init_attr *init_attr = NULL;
1421         int ret = -EIO;
1422
1423         memset(pr, 0, sizeof(struct ehea_port_res));
1424
1425         pr->port = port;
1426         spin_lock_init(&pr->xmit_lock);
1427         spin_lock_init(&pr->netif_queue);
1428
1429         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1430         if (!pr->eq) {
1431                 ehea_error("create_eq failed (eq)");
1432                 goto out_free;
1433         }
1434
1435         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1436                                      pr->eq->fw_handle,
1437                                      port->logical_port_id);
1438         if (!pr->recv_cq) {
1439                 ehea_error("create_cq failed (cq_recv)");
1440                 goto out_free;
1441         }
1442
1443         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1444                                      pr->eq->fw_handle,
1445                                      port->logical_port_id);
1446         if (!pr->send_cq) {
1447                 ehea_error("create_cq failed (cq_send)");
1448                 goto out_free;
1449         }
1450
1451         if (netif_msg_ifup(port))
1452                 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1453                           pr->send_cq->attr.act_nr_of_cqes,
1454                           pr->recv_cq->attr.act_nr_of_cqes);
1455
1456         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1457         if (!init_attr) {
1458                 ret = -ENOMEM;
1459                 ehea_error("no mem for ehea_qp_init_attr");
1460                 goto out_free;
1461         }
1462
1463         init_attr->low_lat_rq1 = 1;
1464         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1465         init_attr->rq_count = 3;
1466         init_attr->qp_token = queue_token;
1467         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1468         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1469         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1470         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1471         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1472         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1473         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1474         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1475         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1476         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1477         init_attr->port_nr = port->logical_port_id;
1478         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1479         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1480         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1481
1482         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1483         if (!pr->qp) {
1484                 ehea_error("create_qp failed");
1485                 ret = -EIO;
1486                 goto out_free;
1487         }
1488
1489         if (netif_msg_ifup(port))
1490                 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1491                           "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1492                           init_attr->act_nr_send_wqes,
1493                           init_attr->act_nr_rwqes_rq1,
1494                           init_attr->act_nr_rwqes_rq2,
1495                           init_attr->act_nr_rwqes_rq3);
1496
1497         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1498
1499         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1500         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1501         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1502         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1503         if (ret)
1504                 goto out_free;
1505
1506         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1507         if (ehea_gen_smrs(pr) != 0) {
1508                 ret = -EIO;
1509                 goto out_free;
1510         }
1511
1512         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1513
1514         kfree(init_attr);
1515
1516         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1517
1518         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1519         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1520         pr->lro_mgr.lro_arr = pr->lro_desc;
1521         pr->lro_mgr.get_skb_header = get_skb_hdr;
1522         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1523         pr->lro_mgr.dev = port->netdev;
1524         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1525         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1526
1527         ret = 0;
1528         goto out;
1529
1530 out_free:
1531         kfree(init_attr);
1532         vfree(pr->sq_skba.arr);
1533         vfree(pr->rq1_skba.arr);
1534         vfree(pr->rq2_skba.arr);
1535         vfree(pr->rq3_skba.arr);
1536         ehea_destroy_qp(pr->qp);
1537         ehea_destroy_cq(pr->send_cq);
1538         ehea_destroy_cq(pr->recv_cq);
1539         ehea_destroy_eq(pr->eq);
1540 out:
1541         return ret;
1542 }
1543
1544 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1545 {
1546         int ret, i;
1547
1548         ret = ehea_destroy_qp(pr->qp);
1549
1550         if (!ret) {
1551                 ehea_destroy_cq(pr->send_cq);
1552                 ehea_destroy_cq(pr->recv_cq);
1553                 ehea_destroy_eq(pr->eq);
1554
1555                 for (i = 0; i < pr->rq1_skba.len; i++)
1556                         if (pr->rq1_skba.arr[i])
1557                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1558
1559                 for (i = 0; i < pr->rq2_skba.len; i++)
1560                         if (pr->rq2_skba.arr[i])
1561                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1562
1563                 for (i = 0; i < pr->rq3_skba.len; i++)
1564                         if (pr->rq3_skba.arr[i])
1565                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1566
1567                 for (i = 0; i < pr->sq_skba.len; i++)
1568                         if (pr->sq_skba.arr[i])
1569                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1570
1571                 vfree(pr->rq1_skba.arr);
1572                 vfree(pr->rq2_skba.arr);
1573                 vfree(pr->rq3_skba.arr);
1574                 vfree(pr->sq_skba.arr);
1575                 ret = ehea_rem_smrs(pr);
1576         }
1577         return ret;
1578 }
1579
1580 /*
1581  * The write_* functions store information in swqe which is used by
1582  * the hardware to calculate the ip/tcp/udp checksum
1583  */
1584
1585 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1586                                       const struct sk_buff *skb)
1587 {
1588         swqe->ip_start = skb_network_offset(skb);
1589         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1590 }
1591
1592 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1593                                         const struct sk_buff *skb)
1594 {
1595         swqe->tcp_offset =
1596                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1597
1598         swqe->tcp_end = (u16)skb->len - 1;
1599 }
1600
1601 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1602                                         const struct sk_buff *skb)
1603 {
1604         swqe->tcp_offset =
1605                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1606
1607         swqe->tcp_end = (u16)skb->len - 1;
1608 }
1609
1610
1611 static void write_swqe2_TSO(struct sk_buff *skb,
1612                             struct ehea_swqe *swqe, u32 lkey)
1613 {
1614         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1615         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1616         int skb_data_size = skb->len - skb->data_len;
1617         int headersize;
1618
1619         /* Packet is TCP with TSO enabled */
1620         swqe->tx_control |= EHEA_SWQE_TSO;
1621         swqe->mss = skb_shinfo(skb)->gso_size;
1622         /* copy only eth/ip/tcp headers to immediate data and
1623          * the rest of skb->data to sg1entry
1624          */
1625         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1626
1627         skb_data_size = skb->len - skb->data_len;
1628
1629         if (skb_data_size >= headersize) {
1630                 /* copy immediate data */
1631                 skb_copy_from_linear_data(skb, imm_data, headersize);
1632                 swqe->immediate_data_length = headersize;
1633
1634                 if (skb_data_size > headersize) {
1635                         /* set sg1entry data */
1636                         sg1entry->l_key = lkey;
1637                         sg1entry->len = skb_data_size - headersize;
1638                         sg1entry->vaddr =
1639                                 ehea_map_vaddr(skb->data + headersize);
1640                         swqe->descriptors++;
1641                 }
1642         } else
1643                 ehea_error("cannot handle fragmented headers");
1644 }
1645
1646 static void write_swqe2_nonTSO(struct sk_buff *skb,
1647                                struct ehea_swqe *swqe, u32 lkey)
1648 {
1649         int skb_data_size = skb->len - skb->data_len;
1650         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1651         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1652
1653         /* Packet is any nonTSO type
1654          *
1655          * Copy as much as possible skb->data to immediate data and
1656          * the rest to sg1entry
1657          */
1658         if (skb_data_size >= SWQE2_MAX_IMM) {
1659                 /* copy immediate data */
1660                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1661
1662                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1663
1664                 if (skb_data_size > SWQE2_MAX_IMM) {
1665                         /* copy sg1entry data */
1666                         sg1entry->l_key = lkey;
1667                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1668                         sg1entry->vaddr =
1669                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1670                         swqe->descriptors++;
1671                 }
1672         } else {
1673                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1674                 swqe->immediate_data_length = skb_data_size;
1675         }
1676 }
1677
1678 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1679                                     struct ehea_swqe *swqe, u32 lkey)
1680 {
1681         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1682         skb_frag_t *frag;
1683         int nfrags, sg1entry_contains_frag_data, i;
1684
1685         nfrags = skb_shinfo(skb)->nr_frags;
1686         sg1entry = &swqe->u.immdata_desc.sg_entry;
1687         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1688         swqe->descriptors = 0;
1689         sg1entry_contains_frag_data = 0;
1690
1691         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1692                 write_swqe2_TSO(skb, swqe, lkey);
1693         else
1694                 write_swqe2_nonTSO(skb, swqe, lkey);
1695
1696         /* write descriptors */
1697         if (nfrags > 0) {
1698                 if (swqe->descriptors == 0) {
1699                         /* sg1entry not yet used */
1700                         frag = &skb_shinfo(skb)->frags[0];
1701
1702                         /* copy sg1entry data */
1703                         sg1entry->l_key = lkey;
1704                         sg1entry->len = frag->size;
1705                         sg1entry->vaddr =
1706                                 ehea_map_vaddr(page_address(frag->page)
1707                                                + frag->page_offset);
1708                         swqe->descriptors++;
1709                         sg1entry_contains_frag_data = 1;
1710                 }
1711
1712                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1713
1714                         frag = &skb_shinfo(skb)->frags[i];
1715                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1716
1717                         sgentry->l_key = lkey;
1718                         sgentry->len = frag->size;
1719                         sgentry->vaddr =
1720                                 ehea_map_vaddr(page_address(frag->page)
1721                                                + frag->page_offset);
1722                         swqe->descriptors++;
1723                 }
1724         }
1725 }
1726
1727 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1728 {
1729         int ret = 0;
1730         u64 hret;
1731         u8 reg_type;
1732
1733         /* De/Register untagged packets */
1734         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1735         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1736                                      port->logical_port_id,
1737                                      reg_type, port->mac_addr, 0, hcallid);
1738         if (hret != H_SUCCESS) {
1739                 ehea_error("%sregistering bc address failed (tagged)",
1740                            hcallid == H_REG_BCMC ? "" : "de");
1741                 ret = -EIO;
1742                 goto out_herr;
1743         }
1744
1745         /* De/Register VLAN packets */
1746         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1747         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1748                                      port->logical_port_id,
1749                                      reg_type, port->mac_addr, 0, hcallid);
1750         if (hret != H_SUCCESS) {
1751                 ehea_error("%sregistering bc address failed (vlan)",
1752                            hcallid == H_REG_BCMC ? "" : "de");
1753                 ret = -EIO;
1754         }
1755 out_herr:
1756         return ret;
1757 }
1758
1759 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1760 {
1761         struct ehea_port *port = netdev_priv(dev);
1762         struct sockaddr *mac_addr = sa;
1763         struct hcp_ehea_port_cb0 *cb0;
1764         int ret;
1765         u64 hret;
1766
1767         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1768                 ret = -EADDRNOTAVAIL;
1769                 goto out;
1770         }
1771
1772         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1773         if (!cb0) {
1774                 ehea_error("no mem for cb0");
1775                 ret = -ENOMEM;
1776                 goto out;
1777         }
1778
1779         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1780
1781         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1782
1783         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1784                                        port->logical_port_id, H_PORT_CB0,
1785                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1786         if (hret != H_SUCCESS) {
1787                 ret = -EIO;
1788                 goto out_free;
1789         }
1790
1791         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1792
1793         /* Deregister old MAC in pHYP */
1794         if (port->state == EHEA_PORT_UP) {
1795                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1796                 if (ret)
1797                         goto out_upregs;
1798         }
1799
1800         port->mac_addr = cb0->port_mac_addr << 16;
1801
1802         /* Register new MAC in pHYP */
1803         if (port->state == EHEA_PORT_UP) {
1804                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1805                 if (ret)
1806                         goto out_upregs;
1807         }
1808
1809         ret = 0;
1810
1811 out_upregs:
1812         ehea_update_bcmc_registrations();
1813 out_free:
1814         free_page((unsigned long)cb0);
1815 out:
1816         return ret;
1817 }
1818
1819 static void ehea_promiscuous_error(u64 hret, int enable)
1820 {
1821         if (hret == H_AUTHORITY)
1822                 ehea_info("Hypervisor denied %sabling promiscuous mode",
1823                           enable == 1 ? "en" : "dis");
1824         else
1825                 ehea_error("failed %sabling promiscuous mode",
1826                            enable == 1 ? "en" : "dis");
1827 }
1828
1829 static void ehea_promiscuous(struct net_device *dev, int enable)
1830 {
1831         struct ehea_port *port = netdev_priv(dev);
1832         struct hcp_ehea_port_cb7 *cb7;
1833         u64 hret;
1834
1835         if ((enable && port->promisc) || (!enable && !port->promisc))
1836                 return;
1837
1838         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1839         if (!cb7) {
1840                 ehea_error("no mem for cb7");
1841                 goto out;
1842         }
1843
1844         /* Modify Pxs_DUCQPN in CB7 */
1845         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1846
1847         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1848                                        port->logical_port_id,
1849                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1850         if (hret) {
1851                 ehea_promiscuous_error(hret, enable);
1852                 goto out;
1853         }
1854
1855         port->promisc = enable;
1856 out:
1857         free_page((unsigned long)cb7);
1858         return;
1859 }
1860
1861 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1862                                      u32 hcallid)
1863 {
1864         u64 hret;
1865         u8 reg_type;
1866
1867         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1868                  | EHEA_BCMC_UNTAGGED;
1869
1870         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1871                                      port->logical_port_id,
1872                                      reg_type, mc_mac_addr, 0, hcallid);
1873         if (hret)
1874                 goto out;
1875
1876         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1877                  | EHEA_BCMC_VLANID_ALL;
1878
1879         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1880                                      port->logical_port_id,
1881                                      reg_type, mc_mac_addr, 0, hcallid);
1882 out:
1883         return hret;
1884 }
1885
1886 static int ehea_drop_multicast_list(struct net_device *dev)
1887 {
1888         struct ehea_port *port = netdev_priv(dev);
1889         struct ehea_mc_list *mc_entry = port->mc_list;
1890         struct list_head *pos;
1891         struct list_head *temp;
1892         int ret = 0;
1893         u64 hret;
1894
1895         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1896                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1897
1898                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1899                                                  H_DEREG_BCMC);
1900                 if (hret) {
1901                         ehea_error("failed deregistering mcast MAC");
1902                         ret = -EIO;
1903                 }
1904
1905                 list_del(pos);
1906                 kfree(mc_entry);
1907         }
1908         return ret;
1909 }
1910
1911 static void ehea_allmulti(struct net_device *dev, int enable)
1912 {
1913         struct ehea_port *port = netdev_priv(dev);
1914         u64 hret;
1915
1916         if (!port->allmulti) {
1917                 if (enable) {
1918                         /* Enable ALLMULTI */
1919                         ehea_drop_multicast_list(dev);
1920                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1921                         if (!hret)
1922                                 port->allmulti = 1;
1923                         else
1924                                 ehea_error("failed enabling IFF_ALLMULTI");
1925                 }
1926         } else
1927                 if (!enable) {
1928                         /* Disable ALLMULTI */
1929                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1930                         if (!hret)
1931                                 port->allmulti = 0;
1932                         else
1933                                 ehea_error("failed disabling IFF_ALLMULTI");
1934                 }
1935 }
1936
1937 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1938 {
1939         struct ehea_mc_list *ehea_mcl_entry;
1940         u64 hret;
1941
1942         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1943         if (!ehea_mcl_entry) {
1944                 ehea_error("no mem for mcl_entry");
1945                 return;
1946         }
1947
1948         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1949
1950         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1951
1952         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1953                                          H_REG_BCMC);
1954         if (!hret)
1955                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1956         else {
1957                 ehea_error("failed registering mcast MAC");
1958                 kfree(ehea_mcl_entry);
1959         }
1960 }
1961
1962 static void ehea_set_multicast_list(struct net_device *dev)
1963 {
1964         struct ehea_port *port = netdev_priv(dev);
1965         struct dev_mc_list *k_mcl_entry;
1966         int ret, i;
1967
1968         if (dev->flags & IFF_PROMISC) {
1969                 ehea_promiscuous(dev, 1);
1970                 return;
1971         }
1972         ehea_promiscuous(dev, 0);
1973
1974         if (dev->flags & IFF_ALLMULTI) {
1975                 ehea_allmulti(dev, 1);
1976                 goto out;
1977         }
1978         ehea_allmulti(dev, 0);
1979
1980         if (dev->mc_count) {
1981                 ret = ehea_drop_multicast_list(dev);
1982                 if (ret) {
1983                         /* Dropping the current multicast list failed.
1984                          * Enabling ALL_MULTI is the best we can do.
1985                          */
1986                         ehea_allmulti(dev, 1);
1987                 }
1988
1989                 if (dev->mc_count > port->adapter->max_mc_mac) {
1990                         ehea_info("Mcast registration limit reached (0x%llx). "
1991                                   "Use ALLMULTI!",
1992                                   port->adapter->max_mc_mac);
1993                         goto out;
1994                 }
1995
1996                 for (i = 0, k_mcl_entry = dev->mc_list; i < dev->mc_count; i++,
1997                              k_mcl_entry = k_mcl_entry->next)
1998                         ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1999
2000         }
2001 out:
2002         ehea_update_bcmc_registrations();
2003         return;
2004 }
2005
2006 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2007 {
2008         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2009                 return -EINVAL;
2010         dev->mtu = new_mtu;
2011         return 0;
2012 }
2013
2014 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2015                        struct ehea_swqe *swqe, u32 lkey)
2016 {
2017         if (skb->protocol == htons(ETH_P_IP)) {
2018                 const struct iphdr *iph = ip_hdr(skb);
2019
2020                 /* IPv4 */
2021                 swqe->tx_control |= EHEA_SWQE_CRC
2022                                  | EHEA_SWQE_IP_CHECKSUM
2023                                  | EHEA_SWQE_TCP_CHECKSUM
2024                                  | EHEA_SWQE_IMM_DATA_PRESENT
2025                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2026
2027                 write_ip_start_end(swqe, skb);
2028
2029                 if (iph->protocol == IPPROTO_UDP) {
2030                         if ((iph->frag_off & IP_MF)
2031                             || (iph->frag_off & IP_OFFSET))
2032                                 /* IP fragment, so don't change cs */
2033                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2034                         else
2035                                 write_udp_offset_end(swqe, skb);
2036                 } else if (iph->protocol == IPPROTO_TCP) {
2037                         write_tcp_offset_end(swqe, skb);
2038                 }
2039
2040                 /* icmp (big data) and ip segmentation packets (all other ip
2041                    packets) do not require any special handling */
2042
2043         } else {
2044                 /* Other Ethernet Protocol */
2045                 swqe->tx_control |= EHEA_SWQE_CRC
2046                                  | EHEA_SWQE_IMM_DATA_PRESENT
2047                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2048         }
2049
2050         write_swqe2_data(skb, dev, swqe, lkey);
2051 }
2052
2053 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2054                        struct ehea_swqe *swqe)
2055 {
2056         int nfrags = skb_shinfo(skb)->nr_frags;
2057         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2058         skb_frag_t *frag;
2059         int i;
2060
2061         if (skb->protocol == htons(ETH_P_IP)) {
2062                 const struct iphdr *iph = ip_hdr(skb);
2063
2064                 /* IPv4 */
2065                 write_ip_start_end(swqe, skb);
2066
2067                 if (iph->protocol == IPPROTO_TCP) {
2068                         swqe->tx_control |= EHEA_SWQE_CRC
2069                                          | EHEA_SWQE_IP_CHECKSUM
2070                                          | EHEA_SWQE_TCP_CHECKSUM
2071                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2072
2073                         write_tcp_offset_end(swqe, skb);
2074
2075                 } else if (iph->protocol == IPPROTO_UDP) {
2076                         if ((iph->frag_off & IP_MF)
2077                             || (iph->frag_off & IP_OFFSET))
2078                                 /* IP fragment, so don't change cs */
2079                                 swqe->tx_control |= EHEA_SWQE_CRC
2080                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2081                         else {
2082                                 swqe->tx_control |= EHEA_SWQE_CRC
2083                                                  | EHEA_SWQE_IP_CHECKSUM
2084                                                  | EHEA_SWQE_TCP_CHECKSUM
2085                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2086
2087                                 write_udp_offset_end(swqe, skb);
2088                         }
2089                 } else {
2090                         /* icmp (big data) and
2091                            ip segmentation packets (all other ip packets) */
2092                         swqe->tx_control |= EHEA_SWQE_CRC
2093                                          | EHEA_SWQE_IP_CHECKSUM
2094                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2095                 }
2096         } else {
2097                 /* Other Ethernet Protocol */
2098                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2099         }
2100         /* copy (immediate) data */
2101         if (nfrags == 0) {
2102                 /* data is in a single piece */
2103                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2104         } else {
2105                 /* first copy data from the skb->data buffer ... */
2106                 skb_copy_from_linear_data(skb, imm_data,
2107                                           skb->len - skb->data_len);
2108                 imm_data += skb->len - skb->data_len;
2109
2110                 /* ... then copy data from the fragments */
2111                 for (i = 0; i < nfrags; i++) {
2112                         frag = &skb_shinfo(skb)->frags[i];
2113                         memcpy(imm_data,
2114                                page_address(frag->page) + frag->page_offset,
2115                                frag->size);
2116                         imm_data += frag->size;
2117                 }
2118         }
2119         swqe->immediate_data_length = skb->len;
2120         dev_kfree_skb(skb);
2121 }
2122
2123 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
2124 {
2125         struct tcphdr *tcp;
2126         u32 tmp;
2127
2128         if ((skb->protocol == htons(ETH_P_IP)) &&
2129             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
2130                 tcp = (struct tcphdr *)(skb_network_header(skb) +
2131                                         (ip_hdr(skb)->ihl * 4));
2132                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
2133                 tmp += ip_hdr(skb)->daddr % 31;
2134                 return tmp % num_qps;
2135         } else
2136                 return 0;
2137 }
2138
2139 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2140 {
2141         struct ehea_port *port = netdev_priv(dev);
2142         struct ehea_swqe *swqe;
2143         unsigned long flags;
2144         u32 lkey;
2145         int swqe_index;
2146         struct ehea_port_res *pr;
2147
2148         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
2149
2150         if (!spin_trylock(&pr->xmit_lock))
2151                 return NETDEV_TX_BUSY;
2152
2153         if (pr->queue_stopped) {
2154                 spin_unlock(&pr->xmit_lock);
2155                 return NETDEV_TX_BUSY;
2156         }
2157
2158         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2159         memset(swqe, 0, SWQE_HEADER_SIZE);
2160         atomic_dec(&pr->swqe_avail);
2161
2162         if (skb->len <= SWQE3_MAX_IMM) {
2163                 u32 sig_iv = port->sig_comp_iv;
2164                 u32 swqe_num = pr->swqe_id_counter;
2165                 ehea_xmit3(skb, dev, swqe);
2166                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2167                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2168                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2169                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2170                                                       sig_iv);
2171                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2172                         pr->swqe_ll_count = 0;
2173                 } else
2174                         pr->swqe_ll_count += 1;
2175         } else {
2176                 swqe->wr_id =
2177                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2178                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2179                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2180                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2181                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2182
2183                 pr->sq_skba.index++;
2184                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2185
2186                 lkey = pr->send_mr.lkey;
2187                 ehea_xmit2(skb, dev, swqe, lkey);
2188                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2189         }
2190         pr->swqe_id_counter += 1;
2191
2192         if (port->vgrp && vlan_tx_tag_present(skb)) {
2193                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2194                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2195         }
2196
2197         if (netif_msg_tx_queued(port)) {
2198                 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
2199                 ehea_dump(swqe, 512, "swqe");
2200         }
2201
2202         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2203                 netif_stop_queue(dev);
2204                 swqe->tx_control |= EHEA_SWQE_PURGE;
2205         }
2206
2207         ehea_post_swqe(pr->qp, swqe);
2208         pr->tx_packets++;
2209
2210         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2211                 spin_lock_irqsave(&pr->netif_queue, flags);
2212                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2213                         pr->p_stats.queue_stopped++;
2214                         netif_stop_queue(dev);
2215                         pr->queue_stopped = 1;
2216                 }
2217                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2218         }
2219         dev->trans_start = jiffies;
2220         spin_unlock(&pr->xmit_lock);
2221
2222         return NETDEV_TX_OK;
2223 }
2224
2225 static void ehea_vlan_rx_register(struct net_device *dev,
2226                                   struct vlan_group *grp)
2227 {
2228         struct ehea_port *port = netdev_priv(dev);
2229         struct ehea_adapter *adapter = port->adapter;
2230         struct hcp_ehea_port_cb1 *cb1;
2231         u64 hret;
2232
2233         port->vgrp = grp;
2234
2235         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2236         if (!cb1) {
2237                 ehea_error("no mem for cb1");
2238                 goto out;
2239         }
2240
2241         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2242                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2243         if (hret != H_SUCCESS)
2244                 ehea_error("modify_ehea_port failed");
2245
2246         free_page((unsigned long)cb1);
2247 out:
2248         return;
2249 }
2250
2251 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2252 {
2253         struct ehea_port *port = netdev_priv(dev);
2254         struct ehea_adapter *adapter = port->adapter;
2255         struct hcp_ehea_port_cb1 *cb1;
2256         int index;
2257         u64 hret;
2258
2259         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2260         if (!cb1) {
2261                 ehea_error("no mem for cb1");
2262                 goto out;
2263         }
2264
2265         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2266                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2267         if (hret != H_SUCCESS) {
2268                 ehea_error("query_ehea_port failed");
2269                 goto out;
2270         }
2271
2272         index = (vid / 64);
2273         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2274
2275         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2276                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2277         if (hret != H_SUCCESS)
2278                 ehea_error("modify_ehea_port failed");
2279 out:
2280         free_page((unsigned long)cb1);
2281         return;
2282 }
2283
2284 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2285 {
2286         struct ehea_port *port = netdev_priv(dev);
2287         struct ehea_adapter *adapter = port->adapter;
2288         struct hcp_ehea_port_cb1 *cb1;
2289         int index;
2290         u64 hret;
2291
2292         vlan_group_set_device(port->vgrp, vid, NULL);
2293
2294         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2295         if (!cb1) {
2296                 ehea_error("no mem for cb1");
2297                 goto out;
2298         }
2299
2300         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2301                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2302         if (hret != H_SUCCESS) {
2303                 ehea_error("query_ehea_port failed");
2304                 goto out;
2305         }
2306
2307         index = (vid / 64);
2308         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2309
2310         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2311                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2312         if (hret != H_SUCCESS)
2313                 ehea_error("modify_ehea_port failed");
2314 out:
2315         free_page((unsigned long)cb1);
2316         return;
2317 }
2318
2319 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2320 {
2321         int ret = -EIO;
2322         u64 hret;
2323         u16 dummy16 = 0;
2324         u64 dummy64 = 0;
2325         struct hcp_modify_qp_cb0 *cb0;
2326
2327         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2328         if (!cb0) {
2329                 ret = -ENOMEM;
2330                 goto out;
2331         }
2332
2333         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2334                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2335         if (hret != H_SUCCESS) {
2336                 ehea_error("query_ehea_qp failed (1)");
2337                 goto out;
2338         }
2339
2340         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2341         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2342                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2343                                      &dummy64, &dummy64, &dummy16, &dummy16);
2344         if (hret != H_SUCCESS) {
2345                 ehea_error("modify_ehea_qp failed (1)");
2346                 goto out;
2347         }
2348
2349         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2350                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2351         if (hret != H_SUCCESS) {
2352                 ehea_error("query_ehea_qp failed (2)");
2353                 goto out;
2354         }
2355
2356         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2357         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2358                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2359                                      &dummy64, &dummy64, &dummy16, &dummy16);
2360         if (hret != H_SUCCESS) {
2361                 ehea_error("modify_ehea_qp failed (2)");
2362                 goto out;
2363         }
2364
2365         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2366                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2367         if (hret != H_SUCCESS) {
2368                 ehea_error("query_ehea_qp failed (3)");
2369                 goto out;
2370         }
2371
2372         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2373         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2374                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2375                                      &dummy64, &dummy64, &dummy16, &dummy16);
2376         if (hret != H_SUCCESS) {
2377                 ehea_error("modify_ehea_qp failed (3)");
2378                 goto out;
2379         }
2380
2381         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2382                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2383         if (hret != H_SUCCESS) {
2384                 ehea_error("query_ehea_qp failed (4)");
2385                 goto out;
2386         }
2387
2388         ret = 0;
2389 out:
2390         free_page((unsigned long)cb0);
2391         return ret;
2392 }
2393
2394 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2395                                int add_tx_qps)
2396 {
2397         int ret, i;
2398         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2399         enum ehea_eq_type eq_type = EHEA_EQ;
2400
2401         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2402                                    EHEA_MAX_ENTRIES_EQ, 1);
2403         if (!port->qp_eq) {
2404                 ret = -EINVAL;
2405                 ehea_error("ehea_create_eq failed (qp_eq)");
2406                 goto out_kill_eq;
2407         }
2408
2409         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2410         pr_cfg.max_entries_scq = sq_entries * 2;
2411         pr_cfg.max_entries_sq = sq_entries;
2412         pr_cfg.max_entries_rq1 = rq1_entries;
2413         pr_cfg.max_entries_rq2 = rq2_entries;
2414         pr_cfg.max_entries_rq3 = rq3_entries;
2415
2416         pr_cfg_small_rx.max_entries_rcq = 1;
2417         pr_cfg_small_rx.max_entries_scq = sq_entries;
2418         pr_cfg_small_rx.max_entries_sq = sq_entries;
2419         pr_cfg_small_rx.max_entries_rq1 = 1;
2420         pr_cfg_small_rx.max_entries_rq2 = 1;
2421         pr_cfg_small_rx.max_entries_rq3 = 1;
2422
2423         for (i = 0; i < def_qps; i++) {
2424                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2425                 if (ret)
2426                         goto out_clean_pr;
2427         }
2428         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2429                 ret = ehea_init_port_res(port, &port->port_res[i],
2430                                          &pr_cfg_small_rx, i);
2431                 if (ret)
2432                         goto out_clean_pr;
2433         }
2434
2435         return 0;
2436
2437 out_clean_pr:
2438         while (--i >= 0)
2439                 ehea_clean_portres(port, &port->port_res[i]);
2440
2441 out_kill_eq:
2442         ehea_destroy_eq(port->qp_eq);
2443         return ret;
2444 }
2445
2446 static int ehea_clean_all_portres(struct ehea_port *port)
2447 {
2448         int ret = 0;
2449         int i;
2450
2451         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2452                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2453
2454         ret |= ehea_destroy_eq(port->qp_eq);
2455
2456         return ret;
2457 }
2458
2459 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2460 {
2461         if (adapter->active_ports)
2462                 return;
2463
2464         ehea_rem_mr(&adapter->mr);
2465 }
2466
2467 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2468 {
2469         if (adapter->active_ports)
2470                 return 0;
2471
2472         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2473 }
2474
2475 static int ehea_up(struct net_device *dev)
2476 {
2477         int ret, i;
2478         struct ehea_port *port = netdev_priv(dev);
2479
2480         if (port->state == EHEA_PORT_UP)
2481                 return 0;
2482
2483         ret = ehea_port_res_setup(port, port->num_def_qps,
2484                                   port->num_add_tx_qps);
2485         if (ret) {
2486                 ehea_error("port_res_failed");
2487                 goto out;
2488         }
2489
2490         /* Set default QP for this port */
2491         ret = ehea_configure_port(port);
2492         if (ret) {
2493                 ehea_error("ehea_configure_port failed. ret:%d", ret);
2494                 goto out_clean_pr;
2495         }
2496
2497         ret = ehea_reg_interrupts(dev);
2498         if (ret) {
2499                 ehea_error("reg_interrupts failed. ret:%d", ret);
2500                 goto out_clean_pr;
2501         }
2502
2503         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2504                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2505                 if (ret) {
2506                         ehea_error("activate_qp failed");
2507                         goto out_free_irqs;
2508                 }
2509         }
2510
2511         for (i = 0; i < port->num_def_qps; i++) {
2512                 ret = ehea_fill_port_res(&port->port_res[i]);
2513                 if (ret) {
2514                         ehea_error("out_free_irqs");
2515                         goto out_free_irqs;
2516                 }
2517         }
2518
2519         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2520         if (ret) {
2521                 ret = -EIO;
2522                 goto out_free_irqs;
2523         }
2524
2525         port->state = EHEA_PORT_UP;
2526
2527         ret = 0;
2528         goto out;
2529
2530 out_free_irqs:
2531         ehea_free_interrupts(dev);
2532
2533 out_clean_pr:
2534         ehea_clean_all_portres(port);
2535 out:
2536         if (ret)
2537                 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2538
2539         ehea_update_bcmc_registrations();
2540         ehea_update_firmware_handles();
2541
2542         return ret;
2543 }
2544
2545 static void port_napi_disable(struct ehea_port *port)
2546 {
2547         int i;
2548
2549         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2550                 napi_disable(&port->port_res[i].napi);
2551 }
2552
2553 static void port_napi_enable(struct ehea_port *port)
2554 {
2555         int i;
2556
2557         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2558                 napi_enable(&port->port_res[i].napi);
2559 }
2560
2561 static int ehea_open(struct net_device *dev)
2562 {
2563         int ret;
2564         struct ehea_port *port = netdev_priv(dev);
2565
2566         mutex_lock(&port->port_lock);
2567
2568         if (netif_msg_ifup(port))
2569                 ehea_info("enabling port %s", dev->name);
2570
2571         ret = ehea_up(dev);
2572         if (!ret) {
2573                 port_napi_enable(port);
2574                 netif_start_queue(dev);
2575         }
2576
2577         mutex_unlock(&port->port_lock);
2578
2579         return ret;
2580 }
2581
2582 static int ehea_down(struct net_device *dev)
2583 {
2584         int ret;
2585         struct ehea_port *port = netdev_priv(dev);
2586
2587         if (port->state == EHEA_PORT_DOWN)
2588                 return 0;
2589
2590         ehea_drop_multicast_list(dev);
2591         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2592
2593         ehea_free_interrupts(dev);
2594
2595         port->state = EHEA_PORT_DOWN;
2596
2597         ehea_update_bcmc_registrations();
2598
2599         ret = ehea_clean_all_portres(port);
2600         if (ret)
2601                 ehea_info("Failed freeing resources for %s. ret=%i",
2602                           dev->name, ret);
2603
2604         ehea_update_firmware_handles();
2605
2606         return ret;
2607 }
2608
2609 static int ehea_stop(struct net_device *dev)
2610 {
2611         int ret;
2612         struct ehea_port *port = netdev_priv(dev);
2613
2614         if (netif_msg_ifdown(port))
2615                 ehea_info("disabling port %s", dev->name);
2616
2617         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2618         cancel_work_sync(&port->reset_task);
2619         mutex_lock(&port->port_lock);
2620         netif_stop_queue(dev);
2621         port_napi_disable(port);
2622         ret = ehea_down(dev);
2623         mutex_unlock(&port->port_lock);
2624         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2625         return ret;
2626 }
2627
2628 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2629 {
2630         struct ehea_qp qp = *orig_qp;
2631         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2632         struct ehea_swqe *swqe;
2633         int wqe_index;
2634         int i;
2635
2636         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2637                 swqe = ehea_get_swqe(&qp, &wqe_index);
2638                 swqe->tx_control |= EHEA_SWQE_PURGE;
2639         }
2640 }
2641
2642 static void ehea_flush_sq(struct ehea_port *port)
2643 {
2644         int i;
2645
2646         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2647                 struct ehea_port_res *pr = &port->port_res[i];
2648                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2649                 int k = 0;
2650                 while (atomic_read(&pr->swqe_avail) < swqe_max) {
2651                         msleep(5);
2652                         if (++k == 20)
2653                                 break;
2654                 }
2655         }
2656 }
2657
2658 int ehea_stop_qps(struct net_device *dev)
2659 {
2660         struct ehea_port *port = netdev_priv(dev);
2661         struct ehea_adapter *adapter = port->adapter;
2662         struct hcp_modify_qp_cb0 *cb0;
2663         int ret = -EIO;
2664         int dret;
2665         int i;
2666         u64 hret;
2667         u64 dummy64 = 0;
2668         u16 dummy16 = 0;
2669
2670         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2671         if (!cb0) {
2672                 ret = -ENOMEM;
2673                 goto out;
2674         }
2675
2676         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2677                 struct ehea_port_res *pr =  &port->port_res[i];
2678                 struct ehea_qp *qp = pr->qp;
2679
2680                 /* Purge send queue */
2681                 ehea_purge_sq(qp);
2682
2683                 /* Disable queue pair */
2684                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2685                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2686                                             cb0);
2687                 if (hret != H_SUCCESS) {
2688                         ehea_error("query_ehea_qp failed (1)");
2689                         goto out;
2690                 }
2691
2692                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2693                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2694
2695                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2696                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2697                                                             1), cb0, &dummy64,
2698                                              &dummy64, &dummy16, &dummy16);
2699                 if (hret != H_SUCCESS) {
2700                         ehea_error("modify_ehea_qp failed (1)");
2701                         goto out;
2702                 }
2703
2704                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2705                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2706                                             cb0);
2707                 if (hret != H_SUCCESS) {
2708                         ehea_error("query_ehea_qp failed (2)");
2709                         goto out;
2710                 }
2711
2712                 /* deregister shared memory regions */
2713                 dret = ehea_rem_smrs(pr);
2714                 if (dret) {
2715                         ehea_error("unreg shared memory region failed");
2716                         goto out;
2717                 }
2718         }
2719
2720         ret = 0;
2721 out:
2722         free_page((unsigned long)cb0);
2723
2724         return ret;
2725 }
2726
2727 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2728 {
2729         struct ehea_qp qp = *orig_qp;
2730         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2731         struct ehea_rwqe *rwqe;
2732         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2733         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2734         struct sk_buff *skb;
2735         u32 lkey = pr->recv_mr.lkey;
2736
2737
2738         int i;
2739         int index;
2740
2741         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2742                 rwqe = ehea_get_next_rwqe(&qp, 2);
2743                 rwqe->sg_list[0].l_key = lkey;
2744                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2745                 skb = skba_rq2[index];
2746                 if (skb)
2747                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2748         }
2749
2750         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2751                 rwqe = ehea_get_next_rwqe(&qp, 3);
2752                 rwqe->sg_list[0].l_key = lkey;
2753                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2754                 skb = skba_rq3[index];
2755                 if (skb)
2756                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2757         }
2758 }
2759
2760 int ehea_restart_qps(struct net_device *dev)
2761 {
2762         struct ehea_port *port = netdev_priv(dev);
2763         struct ehea_adapter *adapter = port->adapter;
2764         int ret = 0;
2765         int i;
2766
2767         struct hcp_modify_qp_cb0 *cb0;
2768         u64 hret;
2769         u64 dummy64 = 0;
2770         u16 dummy16 = 0;
2771
2772         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2773         if (!cb0) {
2774                 ret = -ENOMEM;
2775                 goto out;
2776         }
2777
2778         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2779                 struct ehea_port_res *pr =  &port->port_res[i];
2780                 struct ehea_qp *qp = pr->qp;
2781
2782                 ret = ehea_gen_smrs(pr);
2783                 if (ret) {
2784                         ehea_error("creation of shared memory regions failed");
2785                         goto out;
2786                 }
2787
2788                 ehea_update_rqs(qp, pr);
2789
2790                 /* Enable queue pair */
2791                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2792                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2793                                             cb0);
2794                 if (hret != H_SUCCESS) {
2795                         ehea_error("query_ehea_qp failed (1)");
2796                         goto out;
2797                 }
2798
2799                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2800                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2801
2802                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2803                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2804                                                             1), cb0, &dummy64,
2805                                              &dummy64, &dummy16, &dummy16);
2806                 if (hret != H_SUCCESS) {
2807                         ehea_error("modify_ehea_qp failed (1)");
2808                         goto out;
2809                 }
2810
2811                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2812                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2813                                             cb0);
2814                 if (hret != H_SUCCESS) {
2815                         ehea_error("query_ehea_qp failed (2)");
2816                         goto out;
2817                 }
2818
2819                 /* refill entire queue */
2820                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2821                 ehea_refill_rq2(pr, 0);
2822                 ehea_refill_rq3(pr, 0);
2823         }
2824 out:
2825         free_page((unsigned long)cb0);
2826
2827         return ret;
2828 }
2829
2830 static void ehea_reset_port(struct work_struct *work)
2831 {
2832         int ret;
2833         struct ehea_port *port =
2834                 container_of(work, struct ehea_port, reset_task);
2835         struct net_device *dev = port->netdev;
2836
2837         port->resets++;
2838         mutex_lock(&port->port_lock);
2839         netif_stop_queue(dev);
2840
2841         port_napi_disable(port);
2842
2843         ehea_down(dev);
2844
2845         ret = ehea_up(dev);
2846         if (ret)
2847                 goto out;
2848
2849         ehea_set_multicast_list(dev);
2850
2851         if (netif_msg_timer(port))
2852                 ehea_info("Device %s resetted successfully", dev->name);
2853
2854         port_napi_enable(port);
2855
2856         netif_wake_queue(dev);
2857 out:
2858         mutex_unlock(&port->port_lock);
2859         return;
2860 }
2861
2862 static void ehea_rereg_mrs(struct work_struct *work)
2863 {
2864         int ret, i;
2865         struct ehea_adapter *adapter;
2866
2867         mutex_lock(&dlpar_mem_lock);
2868         ehea_info("LPAR memory changed - re-initializing driver");
2869
2870         list_for_each_entry(adapter, &adapter_list, list)
2871                 if (adapter->active_ports) {
2872                         /* Shutdown all ports */
2873                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2874                                 struct ehea_port *port = adapter->port[i];
2875                                 struct net_device *dev;
2876
2877                                 if (!port)
2878                                         continue;
2879
2880                                 dev = port->netdev;
2881
2882                                 if (dev->flags & IFF_UP) {
2883                                         mutex_lock(&port->port_lock);
2884                                         netif_stop_queue(dev);
2885                                         ehea_flush_sq(port);
2886                                         ret = ehea_stop_qps(dev);
2887                                         if (ret) {
2888                                                 mutex_unlock(&port->port_lock);
2889                                                 goto out;
2890                                         }
2891                                         port_napi_disable(port);
2892                                         mutex_unlock(&port->port_lock);
2893                                 }
2894                         }
2895
2896                         /* Unregister old memory region */
2897                         ret = ehea_rem_mr(&adapter->mr);
2898                         if (ret) {
2899                                 ehea_error("unregister MR failed - driver"
2900                                            " inoperable!");
2901                                 goto out;
2902                         }
2903                 }
2904
2905         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2906
2907         list_for_each_entry(adapter, &adapter_list, list)
2908                 if (adapter->active_ports) {
2909                         /* Register new memory region */
2910                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2911                         if (ret) {
2912                                 ehea_error("register MR failed - driver"
2913                                            " inoperable!");
2914                                 goto out;
2915                         }
2916
2917                         /* Restart all ports */
2918                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2919                                 struct ehea_port *port = adapter->port[i];
2920
2921                                 if (port) {
2922                                         struct net_device *dev = port->netdev;
2923
2924                                         if (dev->flags & IFF_UP) {
2925                                                 mutex_lock(&port->port_lock);
2926                                                 port_napi_enable(port);
2927                                                 ret = ehea_restart_qps(dev);
2928                                                 if (!ret)
2929                                                         netif_wake_queue(dev);
2930                                                 mutex_unlock(&port->port_lock);
2931                                         }
2932                                 }
2933                         }
2934                 }
2935         ehea_info("re-initializing driver complete");
2936 out:
2937         mutex_unlock(&dlpar_mem_lock);
2938         return;
2939 }
2940
2941 static void ehea_tx_watchdog(struct net_device *dev)
2942 {
2943         struct ehea_port *port = netdev_priv(dev);
2944
2945         if (netif_carrier_ok(dev) &&
2946             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2947                 ehea_schedule_port_reset(port);
2948 }
2949
2950 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2951 {
2952         struct hcp_query_ehea *cb;
2953         u64 hret;
2954         int ret;
2955
2956         cb = (void *)get_zeroed_page(GFP_KERNEL);
2957         if (!cb) {
2958                 ret = -ENOMEM;
2959                 goto out;
2960         }
2961
2962         hret = ehea_h_query_ehea(adapter->handle, cb);
2963
2964         if (hret != H_SUCCESS) {
2965                 ret = -EIO;
2966                 goto out_herr;
2967         }
2968
2969         adapter->max_mc_mac = cb->max_mc_mac - 1;
2970         ret = 0;
2971
2972 out_herr:
2973         free_page((unsigned long)cb);
2974 out:
2975         return ret;
2976 }
2977
2978 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2979 {
2980         struct hcp_ehea_port_cb4 *cb4;
2981         u64 hret;
2982         int ret = 0;
2983
2984         *jumbo = 0;
2985
2986         /* (Try to) enable *jumbo frames */
2987         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2988         if (!cb4) {
2989                 ehea_error("no mem for cb4");
2990                 ret = -ENOMEM;
2991                 goto out;
2992         } else {
2993                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2994                                               port->logical_port_id,
2995                                               H_PORT_CB4,
2996                                               H_PORT_CB4_JUMBO, cb4);
2997                 if (hret == H_SUCCESS) {
2998                         if (cb4->jumbo_frame)
2999                                 *jumbo = 1;
3000                         else {
3001                                 cb4->jumbo_frame = 1;
3002                                 hret = ehea_h_modify_ehea_port(port->adapter->
3003                                                                handle,
3004                                                                port->
3005                                                                logical_port_id,
3006                                                                H_PORT_CB4,
3007                                                                H_PORT_CB4_JUMBO,
3008                                                                cb4);
3009                                 if (hret == H_SUCCESS)
3010                                         *jumbo = 1;
3011                         }
3012                 } else
3013                         ret = -EINVAL;
3014
3015                 free_page((unsigned long)cb4);
3016         }
3017 out:
3018         return ret;
3019 }
3020
3021 static ssize_t ehea_show_port_id(struct device *dev,
3022                                  struct device_attribute *attr, char *buf)
3023 {
3024         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3025         return sprintf(buf, "%d", port->logical_port_id);
3026 }
3027
3028 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3029                    NULL);
3030
3031 static void __devinit logical_port_release(struct device *dev)
3032 {
3033         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3034         of_node_put(port->ofdev.node);
3035 }
3036
3037 static struct device *ehea_register_port(struct ehea_port *port,
3038                                          struct device_node *dn)
3039 {
3040         int ret;
3041
3042         port->ofdev.node = of_node_get(dn);
3043         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3044         port->ofdev.dev.bus = &ibmebus_bus_type;
3045
3046         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3047         port->ofdev.dev.release = logical_port_release;
3048
3049         ret = of_device_register(&port->ofdev);
3050         if (ret) {
3051                 ehea_error("failed to register device. ret=%d", ret);
3052                 goto out;
3053         }
3054
3055         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3056         if (ret) {
3057                 ehea_error("failed to register attributes, ret=%d", ret);
3058                 goto out_unreg_of_dev;
3059         }
3060
3061         return &port->ofdev.dev;
3062
3063 out_unreg_of_dev:
3064         of_device_unregister(&port->ofdev);
3065 out:
3066         return NULL;
3067 }
3068
3069 static void ehea_unregister_port(struct ehea_port *port)
3070 {
3071         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3072         of_device_unregister(&port->ofdev);
3073 }
3074
3075 static const struct net_device_ops ehea_netdev_ops = {
3076         .ndo_open               = ehea_open,
3077         .ndo_stop               = ehea_stop,
3078         .ndo_start_xmit         = ehea_start_xmit,
3079 #ifdef CONFIG_NET_POLL_CONTROLLER
3080         .ndo_poll_controller    = ehea_netpoll,
3081 #endif
3082         .ndo_get_stats          = ehea_get_stats,
3083         .ndo_set_mac_address    = ehea_set_mac_addr,
3084         .ndo_set_multicast_list = ehea_set_multicast_list,
3085         .ndo_change_mtu         = ehea_change_mtu,
3086         .ndo_vlan_rx_register   = ehea_vlan_rx_register,
3087         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3088         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3089         .ndo_tx_timeout         = ehea_tx_watchdog,
3090 };
3091
3092 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3093                                          u32 logical_port_id,
3094                                          struct device_node *dn)
3095 {
3096         int ret;
3097         struct net_device *dev;
3098         struct ehea_port *port;
3099         struct device *port_dev;
3100         int jumbo;
3101
3102         /* allocate memory for the port structures */
3103         dev = alloc_etherdev(sizeof(struct ehea_port));
3104
3105         if (!dev) {
3106                 ehea_error("no mem for net_device");
3107                 ret = -ENOMEM;
3108                 goto out_err;
3109         }
3110
3111         port = netdev_priv(dev);
3112
3113         mutex_init(&port->port_lock);
3114         port->state = EHEA_PORT_DOWN;
3115         port->sig_comp_iv = sq_entries / 10;
3116
3117         port->adapter = adapter;
3118         port->netdev = dev;
3119         port->logical_port_id = logical_port_id;
3120
3121         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3122
3123         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3124         if (!port->mc_list) {
3125                 ret = -ENOMEM;
3126                 goto out_free_ethdev;
3127         }
3128
3129         INIT_LIST_HEAD(&port->mc_list->list);
3130
3131         ret = ehea_sense_port_attr(port);
3132         if (ret)
3133                 goto out_free_mc_list;
3134
3135         port_dev = ehea_register_port(port, dn);
3136         if (!port_dev)
3137                 goto out_free_mc_list;
3138
3139         SET_NETDEV_DEV(dev, port_dev);
3140
3141         /* initialize net_device structure */
3142         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3143
3144         dev->netdev_ops = &ehea_netdev_ops;
3145         ehea_set_ethtool_ops(dev);
3146
3147         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3148                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3149                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3150                       | NETIF_F_LLTX;
3151         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3152
3153         INIT_WORK(&port->reset_task, ehea_reset_port);
3154
3155         ret = register_netdev(dev);
3156         if (ret) {
3157                 ehea_error("register_netdev failed. ret=%d", ret);
3158                 goto out_unreg_port;
3159         }
3160
3161         port->lro_max_aggr = lro_max_aggr;
3162
3163         ret = ehea_get_jumboframe_status(port, &jumbo);
3164         if (ret)
3165                 ehea_error("failed determining jumbo frame status for %s",
3166                            port->netdev->name);
3167
3168         ehea_info("%s: Jumbo frames are %sabled", dev->name,
3169                   jumbo == 1 ? "en" : "dis");
3170
3171         adapter->active_ports++;
3172
3173         return port;
3174
3175 out_unreg_port:
3176         ehea_unregister_port(port);
3177
3178 out_free_mc_list:
3179         kfree(port->mc_list);
3180
3181 out_free_ethdev:
3182         free_netdev(dev);
3183
3184 out_err:
3185         ehea_error("setting up logical port with id=%d failed, ret=%d",
3186                    logical_port_id, ret);
3187         return NULL;
3188 }
3189
3190 static void ehea_shutdown_single_port(struct ehea_port *port)
3191 {
3192         struct ehea_adapter *adapter = port->adapter;
3193         unregister_netdev(port->netdev);
3194         ehea_unregister_port(port);
3195         kfree(port->mc_list);
3196         free_netdev(port->netdev);
3197         adapter->active_ports--;
3198 }
3199
3200 static int ehea_setup_ports(struct ehea_adapter *adapter)
3201 {
3202         struct device_node *lhea_dn;
3203         struct device_node *eth_dn = NULL;
3204
3205         const u32 *dn_log_port_id;
3206         int i = 0;
3207
3208         lhea_dn = adapter->ofdev->node;
3209         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3210
3211                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3212                                                  NULL);
3213                 if (!dn_log_port_id) {
3214                         ehea_error("bad device node: eth_dn name=%s",
3215                                    eth_dn->full_name);
3216                         continue;
3217                 }
3218
3219                 if (ehea_add_adapter_mr(adapter)) {
3220                         ehea_error("creating MR failed");
3221                         of_node_put(eth_dn);
3222                         return -EIO;
3223                 }
3224
3225                 adapter->port[i] = ehea_setup_single_port(adapter,
3226                                                           *dn_log_port_id,
3227                                                           eth_dn);
3228                 if (adapter->port[i])
3229                         ehea_info("%s -> logical port id #%d",
3230                                   adapter->port[i]->netdev->name,
3231                                   *dn_log_port_id);
3232                 else
3233                         ehea_remove_adapter_mr(adapter);
3234
3235                 i++;
3236         };
3237         return 0;
3238 }
3239
3240 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3241                                            u32 logical_port_id)
3242 {
3243         struct device_node *lhea_dn;
3244         struct device_node *eth_dn = NULL;
3245         const u32 *dn_log_port_id;
3246
3247         lhea_dn = adapter->ofdev->node;
3248         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3249
3250                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3251                                                  NULL);
3252                 if (dn_log_port_id)
3253                         if (*dn_log_port_id == logical_port_id)
3254                                 return eth_dn;
3255         };
3256
3257         return NULL;
3258 }
3259
3260 static ssize_t ehea_probe_port(struct device *dev,
3261                                struct device_attribute *attr,
3262                                const char *buf, size_t count)
3263 {
3264         struct ehea_adapter *adapter = dev->driver_data;
3265         struct ehea_port *port;
3266         struct device_node *eth_dn = NULL;
3267         int i;
3268
3269         u32 logical_port_id;
3270
3271         sscanf(buf, "%d", &logical_port_id);
3272
3273         port = ehea_get_port(adapter, logical_port_id);
3274
3275         if (port) {
3276                 ehea_info("adding port with logical port id=%d failed. port "
3277                           "already configured as %s.", logical_port_id,
3278                           port->netdev->name);
3279                 return -EINVAL;
3280         }
3281
3282         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3283
3284         if (!eth_dn) {
3285                 ehea_info("no logical port with id %d found", logical_port_id);
3286                 return -EINVAL;
3287         }
3288
3289         if (ehea_add_adapter_mr(adapter)) {
3290                 ehea_error("creating MR failed");
3291                 return -EIO;
3292         }
3293
3294         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3295
3296         of_node_put(eth_dn);
3297
3298         if (port) {
3299                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3300                         if (!adapter->port[i]) {
3301                                 adapter->port[i] = port;
3302                                 break;
3303                         }
3304
3305                 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3306                           logical_port_id);
3307         } else {
3308                 ehea_remove_adapter_mr(adapter);
3309                 return -EIO;
3310         }
3311
3312         return (ssize_t) count;
3313 }
3314
3315 static ssize_t ehea_remove_port(struct device *dev,
3316                                 struct device_attribute *attr,
3317                                 const char *buf, size_t count)
3318 {
3319         struct ehea_adapter *adapter = dev->driver_data;
3320         struct ehea_port *port;
3321         int i;
3322         u32 logical_port_id;
3323
3324         sscanf(buf, "%d", &logical_port_id);
3325
3326         port = ehea_get_port(adapter, logical_port_id);
3327
3328         if (port) {
3329                 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3330                           logical_port_id);
3331
3332                 ehea_shutdown_single_port(port);
3333
3334                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3335                         if (adapter->port[i] == port) {
3336                                 adapter->port[i] = NULL;
3337                                 break;
3338                         }
3339         } else {
3340                 ehea_error("removing port with logical port id=%d failed. port "
3341                            "not configured.", logical_port_id);
3342                 return -EINVAL;
3343         }
3344
3345         ehea_remove_adapter_mr(adapter);
3346
3347         return (ssize_t) count;
3348 }
3349
3350 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3351 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3352
3353 int ehea_create_device_sysfs(struct of_device *dev)
3354 {
3355         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3356         if (ret)
3357                 goto out;
3358
3359         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3360 out:
3361         return ret;
3362 }
3363
3364 void ehea_remove_device_sysfs(struct of_device *dev)
3365 {
3366         device_remove_file(&dev->dev, &dev_attr_probe_port);
3367         device_remove_file(&dev->dev, &dev_attr_remove_port);
3368 }
3369
3370 static int __devinit ehea_probe_adapter(struct of_device *dev,
3371                                         const struct of_device_id *id)
3372 {
3373         struct ehea_adapter *adapter;
3374         const u64 *adapter_handle;
3375         int ret;
3376
3377         if (!dev || !dev->node) {
3378                 ehea_error("Invalid ibmebus device probed");
3379                 return -EINVAL;
3380         }
3381
3382         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3383         if (!adapter) {
3384                 ret = -ENOMEM;
3385                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3386                 goto out;
3387         }
3388
3389         list_add(&adapter->list, &adapter_list);
3390
3391         adapter->ofdev = dev;
3392
3393         adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3394                                          NULL);
3395         if (adapter_handle)
3396                 adapter->handle = *adapter_handle;
3397
3398         if (!adapter->handle) {
3399                 dev_err(&dev->dev, "failed getting handle for adapter"
3400                         " '%s'\n", dev->node->full_name);
3401                 ret = -ENODEV;
3402                 goto out_free_ad;
3403         }
3404
3405         adapter->pd = EHEA_PD_ID;
3406
3407         dev->dev.driver_data = adapter;
3408
3409
3410         /* initialize adapter and ports */
3411         /* get adapter properties */
3412         ret = ehea_sense_adapter_attr(adapter);
3413         if (ret) {
3414                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3415                 goto out_free_ad;
3416         }
3417
3418         adapter->neq = ehea_create_eq(adapter,
3419                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3420         if (!adapter->neq) {
3421                 ret = -EIO;
3422                 dev_err(&dev->dev, "NEQ creation failed\n");
3423                 goto out_free_ad;
3424         }
3425
3426         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3427                      (unsigned long)adapter);
3428
3429         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3430                                   ehea_interrupt_neq, IRQF_DISABLED,
3431                                   "ehea_neq", adapter);
3432         if (ret) {
3433                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3434                 goto out_kill_eq;
3435         }
3436
3437         ret = ehea_create_device_sysfs(dev);
3438         if (ret)
3439                 goto out_free_irq;
3440
3441         ret = ehea_setup_ports(adapter);
3442         if (ret) {
3443                 dev_err(&dev->dev, "setup_ports failed\n");
3444                 goto out_rem_dev_sysfs;
3445         }
3446
3447         ret = 0;
3448         goto out;
3449
3450 out_rem_dev_sysfs:
3451         ehea_remove_device_sysfs(dev);
3452
3453 out_free_irq:
3454         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3455
3456 out_kill_eq:
3457         ehea_destroy_eq(adapter->neq);
3458
3459 out_free_ad:
3460         list_del(&adapter->list);
3461         kfree(adapter);
3462
3463 out:
3464         ehea_update_firmware_handles();
3465
3466         return ret;
3467 }
3468
3469 static int __devexit ehea_remove(struct of_device *dev)
3470 {
3471         struct ehea_adapter *adapter = dev->dev.driver_data;
3472         int i;
3473
3474         for (i = 0; i < EHEA_MAX_PORTS; i++)
3475                 if (adapter->port[i]) {
3476                         ehea_shutdown_single_port(adapter->port[i]);
3477                         adapter->port[i] = NULL;
3478                 }
3479
3480         ehea_remove_device_sysfs(dev);
3481
3482         flush_scheduled_work();
3483
3484         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3485         tasklet_kill(&adapter->neq_tasklet);
3486
3487         ehea_destroy_eq(adapter->neq);
3488         ehea_remove_adapter_mr(adapter);
3489         list_del(&adapter->list);
3490         kfree(adapter);
3491
3492         ehea_update_firmware_handles();
3493
3494         return 0;
3495 }
3496
3497 void ehea_crash_handler(void)
3498 {
3499         int i;
3500
3501         if (ehea_fw_handles.arr)
3502                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3503                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3504                                              ehea_fw_handles.arr[i].fwh,
3505                                              FORCE_FREE);
3506
3507         if (ehea_bcmc_regs.arr)
3508                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3509                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3510                                               ehea_bcmc_regs.arr[i].port_id,
3511                                               ehea_bcmc_regs.arr[i].reg_type,
3512                                               ehea_bcmc_regs.arr[i].macaddr,
3513                                               0, H_DEREG_BCMC);
3514 }
3515
3516 static int ehea_mem_notifier(struct notifier_block *nb,
3517                              unsigned long action, void *data)
3518 {
3519         struct memory_notify *arg = data;
3520         switch (action) {
3521         case MEM_CANCEL_OFFLINE:
3522                 ehea_info("memory offlining canceled");
3523                 /* Readd canceled memory block */
3524         case MEM_ONLINE:
3525                 ehea_info("memory is going online");
3526                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3527                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3528                         return NOTIFY_BAD;
3529                 ehea_rereg_mrs(NULL);
3530                 break;
3531         case MEM_GOING_OFFLINE:
3532                 ehea_info("memory is going offline");
3533                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3534                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3535                         return NOTIFY_BAD;
3536                 ehea_rereg_mrs(NULL);
3537                 break;
3538         default:
3539                 break;
3540         }
3541
3542         ehea_update_firmware_handles();
3543
3544         return NOTIFY_OK;
3545 }
3546
3547 static struct notifier_block ehea_mem_nb = {
3548         .notifier_call = ehea_mem_notifier,
3549 };
3550
3551 static int ehea_reboot_notifier(struct notifier_block *nb,
3552                                 unsigned long action, void *unused)
3553 {
3554         if (action == SYS_RESTART) {
3555                 ehea_info("Reboot: freeing all eHEA resources");
3556                 ibmebus_unregister_driver(&ehea_driver);
3557         }
3558         return NOTIFY_DONE;
3559 }
3560
3561 static struct notifier_block ehea_reboot_nb = {
3562         .notifier_call = ehea_reboot_notifier,
3563 };
3564
3565 static int check_module_parm(void)
3566 {
3567         int ret = 0;
3568
3569         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3570             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3571                 ehea_info("Bad parameter: rq1_entries");
3572                 ret = -EINVAL;
3573         }
3574         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3575             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3576                 ehea_info("Bad parameter: rq2_entries");
3577                 ret = -EINVAL;
3578         }
3579         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3580             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3581                 ehea_info("Bad parameter: rq3_entries");
3582                 ret = -EINVAL;
3583         }
3584         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3585             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3586                 ehea_info("Bad parameter: sq_entries");
3587                 ret = -EINVAL;
3588         }
3589
3590         return ret;
3591 }
3592
3593 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3594                                       char *buf)
3595 {
3596         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3597 }
3598
3599 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3600                    ehea_show_capabilities, NULL);
3601
3602 int __init ehea_module_init(void)
3603 {
3604         int ret;
3605
3606         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3607                DRV_VERSION);
3608
3609
3610         INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3611         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3612         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3613
3614         mutex_init(&ehea_fw_handles.lock);
3615         spin_lock_init(&ehea_bcmc_regs.lock);
3616
3617         ret = check_module_parm();
3618         if (ret)
3619                 goto out;
3620
3621         ret = ehea_create_busmap();
3622         if (ret)
3623                 goto out;
3624
3625         ret = register_reboot_notifier(&ehea_reboot_nb);
3626         if (ret)
3627                 ehea_info("failed registering reboot notifier");
3628
3629         ret = register_memory_notifier(&ehea_mem_nb);
3630         if (ret)
3631                 ehea_info("failed registering memory remove notifier");
3632
3633         ret = crash_shutdown_register(&ehea_crash_handler);
3634         if (ret)
3635                 ehea_info("failed registering crash handler");
3636
3637         ret = ibmebus_register_driver(&ehea_driver);
3638         if (ret) {
3639                 ehea_error("failed registering eHEA device driver on ebus");
3640                 goto out2;
3641         }
3642
3643         ret = driver_create_file(&ehea_driver.driver,
3644                                  &driver_attr_capabilities);
3645         if (ret) {
3646                 ehea_error("failed to register capabilities attribute, ret=%d",
3647                            ret);
3648                 goto out3;
3649         }
3650
3651         return ret;
3652
3653 out3:
3654         ibmebus_unregister_driver(&ehea_driver);
3655 out2:
3656         unregister_memory_notifier(&ehea_mem_nb);
3657         unregister_reboot_notifier(&ehea_reboot_nb);
3658         crash_shutdown_unregister(&ehea_crash_handler);
3659 out:
3660         return ret;
3661 }
3662
3663 static void __exit ehea_module_exit(void)
3664 {
3665         int ret;
3666
3667         flush_scheduled_work();
3668         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3669         ibmebus_unregister_driver(&ehea_driver);
3670         unregister_reboot_notifier(&ehea_reboot_nb);
3671         ret = crash_shutdown_unregister(&ehea_crash_handler);
3672         if (ret)
3673                 ehea_info("failed unregistering crash handler");
3674         unregister_memory_notifier(&ehea_mem_nb);
3675         kfree(ehea_fw_handles.arr);
3676         kfree(ehea_bcmc_regs.arr);
3677         ehea_destroy_busmap();
3678 }
3679
3680 module_init(ehea_module_init);
3681 module_exit(ehea_module_exit);