drivers/net/ethernet/ibm/ehea/ehea_main.c

   1 /*
   2  *  linux/drivers/net/ethernet/ibm/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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/in.h>
  32 #include <linux/ip.h>
  33 #include <linux/tcp.h>
  34 #include <linux/udp.h>
  35 #include <linux/if.h>
  36 #include <linux/list.h>
  37 #include <linux/slab.h>
  38 #include <linux/if_ether.h>
  39 #include <linux/notifier.h>
  40 #include <linux/reboot.h>
  41 #include <linux/memory.h>
  42 #include <asm/kexec.h>
  43 #include <linux/mutex.h>
  44 #include <linux/prefetch.h>
  45
  46 #include <net/ip.h>
  47
  48 #include "ehea.h"
  49 #include "ehea_qmr.h"
  50 #include "ehea_phyp.h"
  51
  52
  53 MODULE_LICENSE("GPL");
  54 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  55 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  56 MODULE_VERSION(DRV_VERSION);
  57
  58
  59 static int msg_level = -1;
  60 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  61 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  62 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  63 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  64 static int use_mcs = 1;
  65 static int prop_carrier_state;
  66
  67 module_param(msg_level, int, 0);
  68 module_param(rq1_entries, int, 0);
  69 module_param(rq2_entries, int, 0);
  70 module_param(rq3_entries, int, 0);
  71 module_param(sq_entries, int, 0);
  72 module_param(prop_carrier_state, int, 0);
  73 module_param(use_mcs, int, 0);
  74
  75 MODULE_PARM_DESC(msg_level, "msg_level");
  76 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  77                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  78 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  79                  "[2^x - 1], x = [7..14]. Default = "
  80                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  81 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  82                  "[2^x - 1], x = [7..14]. Default = "
  83                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  84 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  85                  "[2^x - 1], x = [7..14]. Default = "
  86                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  87 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  88                  "[2^x - 1], x = [7..14]. Default = "
  89                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  90 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  91                  "Default = 1");
  92
  93 static int port_name_cnt;
  94 static LIST_HEAD(adapter_list);
  95 static unsigned long ehea_driver_flags;
  96 static DEFINE_MUTEX(dlpar_mem_lock);
  97 static struct ehea_fw_handle_array ehea_fw_handles;
  98 static struct ehea_bcmc_reg_array ehea_bcmc_regs;
  99
 100
 101 static int ehea_probe_adapter(struct platform_device *dev);
 102
 103 static int ehea_remove(struct platform_device *dev);
 104
 105 static struct of_device_id ehea_device_table[] = {
 106         {
 107                 .name = "lhea",
 108                 .compatible = "IBM,lhea",
 109         },
 110         {},
 111 };
 112 MODULE_DEVICE_TABLE(of, ehea_device_table);
 113
 114 static struct platform_driver ehea_driver = {
 115         .driver = {
 116                 .name = "ehea",
 117                 .owner = THIS_MODULE,
 118                 .of_match_table = ehea_device_table,
 119         },
 120         .probe = ehea_probe_adapter,
 121         .remove = ehea_remove,
 122 };
 123
 124 void ehea_dump(void *adr, int len, char *msg)
 125 {
 126         int x;
 127         unsigned char *deb = adr;
 128         for (x = 0; x < len; x += 16) {
 129                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 130                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 131                 deb += 16;
 132         }
 133 }
 134
 135 static void ehea_schedule_port_reset(struct ehea_port *port)
 136 {
 137         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 138                 schedule_work(&port->reset_task);
 139 }
 140
 141 static void ehea_update_firmware_handles(void)
 142 {
 143         struct ehea_fw_handle_entry *arr = NULL;
 144         struct ehea_adapter *adapter;
 145         int num_adapters = 0;
 146         int num_ports = 0;
 147         int num_portres = 0;
 148         int i = 0;
 149         int num_fw_handles, k, l;
 150
 151         /* Determine number of handles */
 152         mutex_lock(&ehea_fw_handles.lock);
 153
 154         list_for_each_entry(adapter, &adapter_list, list) {
 155                 num_adapters++;
 156
 157                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 158                         struct ehea_port *port = adapter->port[k];
 159
 160                         if (!port || (port->state != EHEA_PORT_UP))
 161                                 continue;
 162
 163                         num_ports++;
 164                         num_portres += port->num_def_qps;
 165                 }
 166         }
 167
 168         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 169                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 170                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 171
 172         if (num_fw_handles) {
 173                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 174                 if (!arr)
 175                         goto out;  /* Keep the existing array */
 176         } else
 177                 goto out_update;
 178
 179         list_for_each_entry(adapter, &adapter_list, list) {
 180                 if (num_adapters == 0)
 181                         break;
 182
 183                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 184                         struct ehea_port *port = adapter->port[k];
 185
 186                         if (!port || (port->state != EHEA_PORT_UP) ||
 187                             (num_ports == 0))
 188                                 continue;
 189
 190                         for (l = 0; l < port->num_def_qps; l++) {
 191                                 struct ehea_port_res *pr = &port->port_res[l];
 192
 193                                 arr[i].adh = adapter->handle;
 194                                 arr[i++].fwh = pr->qp->fw_handle;
 195                                 arr[i].adh = adapter->handle;
 196                                 arr[i++].fwh = pr->send_cq->fw_handle;
 197                                 arr[i].adh = adapter->handle;
 198                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 199                                 arr[i].adh = adapter->handle;
 200                                 arr[i++].fwh = pr->eq->fw_handle;
 201                                 arr[i].adh = adapter->handle;
 202                                 arr[i++].fwh = pr->send_mr.handle;
 203                                 arr[i].adh = adapter->handle;
 204                                 arr[i++].fwh = pr->recv_mr.handle;
 205                         }
 206                         arr[i].adh = adapter->handle;
 207                         arr[i++].fwh = port->qp_eq->fw_handle;
 208                         num_ports--;
 209                 }
 210
 211                 arr[i].adh = adapter->handle;
 212                 arr[i++].fwh = adapter->neq->fw_handle;
 213
 214                 if (adapter->mr.handle) {
 215                         arr[i].adh = adapter->handle;
 216                         arr[i++].fwh = adapter->mr.handle;
 217                 }
 218                 num_adapters--;
 219         }
 220
 221 out_update:
 222         kfree(ehea_fw_handles.arr);
 223         ehea_fw_handles.arr = arr;
 224         ehea_fw_handles.num_entries = i;
 225 out:
 226         mutex_unlock(&ehea_fw_handles.lock);
 227 }
 228
 229 static void ehea_update_bcmc_registrations(void)
 230 {
 231         unsigned long flags;
 232         struct ehea_bcmc_reg_entry *arr = NULL;
 233         struct ehea_adapter *adapter;
 234         struct ehea_mc_list *mc_entry;
 235         int num_registrations = 0;
 236         int i = 0;
 237         int k;
 238
 239         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 240
 241         /* Determine number of registrations */
 242         list_for_each_entry(adapter, &adapter_list, list)
 243                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 244                         struct ehea_port *port = adapter->port[k];
 245
 246                         if (!port || (port->state != EHEA_PORT_UP))
 247                                 continue;
 248
 249                         num_registrations += 2; /* Broadcast registrations */
 250
 251                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 252                                 num_registrations += 2;
 253                 }
 254
 255         if (num_registrations) {
 256                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 257                 if (!arr)
 258                         goto out;  /* Keep the existing array */
 259         } else
 260                 goto out_update;
 261
 262         list_for_each_entry(adapter, &adapter_list, list) {
 263                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 264                         struct ehea_port *port = adapter->port[k];
 265
 266                         if (!port || (port->state != EHEA_PORT_UP))
 267                                 continue;
 268
 269                         if (num_registrations == 0)
 270                                 goto out_update;
 271
 272                         arr[i].adh = adapter->handle;
 273                         arr[i].port_id = port->logical_port_id;
 274                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 275                                           EHEA_BCMC_UNTAGGED;
 276                         arr[i++].macaddr = port->mac_addr;
 277
 278                         arr[i].adh = adapter->handle;
 279                         arr[i].port_id = port->logical_port_id;
 280                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 281                                           EHEA_BCMC_VLANID_ALL;
 282                         arr[i++].macaddr = port->mac_addr;
 283                         num_registrations -= 2;
 284
 285                         list_for_each_entry(mc_entry,
 286                                             &port->mc_list->list, list) {
 287                                 if (num_registrations == 0)
 288                                         goto out_update;
 289
 290                                 arr[i].adh = adapter->handle;
 291                                 arr[i].port_id = port->logical_port_id;
 292                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 293                                                   EHEA_BCMC_UNTAGGED;
 294                                 if (mc_entry->macaddr == 0)
 295                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 296                                 arr[i++].macaddr = mc_entry->macaddr;
 297
 298                                 arr[i].adh = adapter->handle;
 299                                 arr[i].port_id = port->logical_port_id;
 300                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 301                                                   EHEA_BCMC_VLANID_ALL;
 302                                 if (mc_entry->macaddr == 0)
 303                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 304                                 arr[i++].macaddr = mc_entry->macaddr;
 305                                 num_registrations -= 2;
 306                         }
 307                 }
 308         }
 309
 310 out_update:
 311         kfree(ehea_bcmc_regs.arr);
 312         ehea_bcmc_regs.arr = arr;
 313         ehea_bcmc_regs.num_entries = i;
 314 out:
 315         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 316 }
 317
 318 static struct rtnl_link_stats64 *ehea_get_stats64(struct net_device *dev,
 319                                         struct rtnl_link_stats64 *stats)
 320 {
 321         struct ehea_port *port = netdev_priv(dev);
 322         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 323         int i;
 324
 325         for (i = 0; i < port->num_def_qps; i++) {
 326                 rx_packets += port->port_res[i].rx_packets;
 327                 rx_bytes   += port->port_res[i].rx_bytes;
 328         }
 329
 330         for (i = 0; i < port->num_def_qps; i++) {
 331                 tx_packets += port->port_res[i].tx_packets;
 332                 tx_bytes   += port->port_res[i].tx_bytes;
 333         }
 334
 335         stats->tx_packets = tx_packets;
 336         stats->rx_bytes = rx_bytes;
 337         stats->tx_bytes = tx_bytes;
 338         stats->rx_packets = rx_packets;
 339
 340         stats->multicast = port->stats.multicast;
 341         stats->rx_errors = port->stats.rx_errors;
 342         return stats;
 343 }
 344
 345 static void ehea_update_stats(struct work_struct *work)
 346 {
 347         struct ehea_port *port =
 348                 container_of(work, struct ehea_port, stats_work.work);
 349         struct net_device *dev = port->netdev;
 350         struct rtnl_link_stats64 *stats = &port->stats;
 351         struct hcp_ehea_port_cb2 *cb2;
 352         u64 hret;
 353
 354         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 355         if (!cb2) {
 356                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 357                 goto resched;
 358         }
 359
 360         hret = ehea_h_query_ehea_port(port->adapter->handle,
 361                                       port->logical_port_id,
 362                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 363         if (hret != H_SUCCESS) {
 364                 netdev_err(dev, "query_ehea_port failed\n");
 365                 goto out_herr;
 366         }
 367
 368         if (netif_msg_hw(port))
 369                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 370
 371         stats->multicast = cb2->rxmcp;
 372         stats->rx_errors = cb2->rxuerr;
 373
 374 out_herr:
 375         free_page((unsigned long)cb2);
 376 resched:
 377         schedule_delayed_work(&port->stats_work,
 378                               round_jiffies_relative(msecs_to_jiffies(1000)));
 379 }
 380
 381 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 382 {
 383         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 384         struct net_device *dev = pr->port->netdev;
 385         int max_index_mask = pr->rq1_skba.len - 1;
 386         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 387         int adder = 0;
 388         int i;
 389
 390         pr->rq1_skba.os_skbs = 0;
 391
 392         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 393                 if (nr_of_wqes > 0)
 394                         pr->rq1_skba.index = index;
 395                 pr->rq1_skba.os_skbs = fill_wqes;
 396                 return;
 397         }
 398
 399         for (i = 0; i < fill_wqes; i++) {
 400                 if (!skb_arr_rq1[index]) {
 401                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 402                                                               EHEA_L_PKT_SIZE);
 403                         if (!skb_arr_rq1[index]) {
 404                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 405                                 break;
 406                         }
 407                 }
 408                 index--;
 409                 index &= max_index_mask;
 410                 adder++;
 411         }
 412
 413         if (adder == 0)
 414                 return;
 415
 416         /* Ring doorbell */
 417         ehea_update_rq1a(pr->qp, adder);
 418 }
 419
 420 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 421 {
 422         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 423         struct net_device *dev = pr->port->netdev;
 424         int i;
 425
 426         if (nr_rq1a > pr->rq1_skba.len) {
 427                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 428                 return;
 429         }
 430
 431         for (i = 0; i < nr_rq1a; i++) {
 432                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 433                 if (!skb_arr_rq1[i])
 434                         break;
 435         }
 436         /* Ring doorbell */
 437         ehea_update_rq1a(pr->qp, i - 1);
 438 }
 439
 440 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 441                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 442                               int num_wqes, int wqe_type, int packet_size)
 443 {
 444         struct net_device *dev = pr->port->netdev;
 445         struct ehea_qp *qp = pr->qp;
 446         struct sk_buff **skb_arr = q_skba->arr;
 447         struct ehea_rwqe *rwqe;
 448         int i, index, max_index_mask, fill_wqes;
 449         int adder = 0;
 450         int ret = 0;
 451
 452         fill_wqes = q_skba->os_skbs + num_wqes;
 453         q_skba->os_skbs = 0;
 454
 455         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 456                 q_skba->os_skbs = fill_wqes;
 457                 return ret;
 458         }
 459
 460         index = q_skba->index;
 461         max_index_mask = q_skba->len - 1;
 462         for (i = 0; i < fill_wqes; i++) {
 463                 u64 tmp_addr;
 464                 struct sk_buff *skb;
 465
 466                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 467                 if (!skb) {
 468                         q_skba->os_skbs = fill_wqes - i;
 469                         if (q_skba->os_skbs == q_skba->len - 2) {
 470                                 netdev_info(pr->port->netdev,
 471                                             "rq%i ran dry - no mem for skb\n",
 472                                             rq_nr);
 473                                 ret = -ENOMEM;
 474                         }
 475                         break;
 476                 }
 477
 478                 skb_arr[index] = skb;
 479                 tmp_addr = ehea_map_vaddr(skb->data);
 480                 if (tmp_addr == -1) {
 481                         dev_kfree_skb(skb);
 482                         q_skba->os_skbs = fill_wqes - i;
 483                         ret = 0;
 484                         break;
 485                 }
 486
 487                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 488                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 489                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 490                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 491                 rwqe->sg_list[0].vaddr = tmp_addr;
 492                 rwqe->sg_list[0].len = packet_size;
 493                 rwqe->data_segments = 1;
 494
 495                 index++;
 496                 index &= max_index_mask;
 497                 adder++;
 498         }
 499
 500         q_skba->index = index;
 501         if (adder == 0)
 502                 goto out;
 503
 504         /* Ring doorbell */
 505         iosync();
 506         if (rq_nr == 2)
 507                 ehea_update_rq2a(pr->qp, adder);
 508         else
 509                 ehea_update_rq3a(pr->qp, adder);
 510 out:
 511         return ret;
 512 }
 513
 514
 515 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 516 {
 517         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 518                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 519                                   EHEA_RQ2_PKT_SIZE);
 520 }
 521
 522
 523 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 524 {
 525         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 526                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 527                                   EHEA_MAX_PACKET_SIZE);
 528 }
 529
 530 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 531 {
 532         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 533         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 534                 return 0;
 535         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 536             (cqe->header_length == 0))
 537                 return 0;
 538         return -EINVAL;
 539 }
 540
 541 static inline void ehea_fill_skb(struct net_device *dev,
 542                                  struct sk_buff *skb, struct ehea_cqe *cqe,
 543                                  struct ehea_port_res *pr)
 544 {
 545         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 546
 547         skb_put(skb, length);
 548         skb->protocol = eth_type_trans(skb, dev);
 549
 550         /* The packet was not an IPV4 packet so a complemented checksum was
 551            calculated. The value is found in the Internet Checksum field. */
 552         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 553                 skb->ip_summed = CHECKSUM_COMPLETE;
 554                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 555         } else
 556                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 557
 558         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 559 }
 560
 561 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 562                                                int arr_len,
 563                                                struct ehea_cqe *cqe)
 564 {
 565         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 566         struct sk_buff *skb;
 567         void *pref;
 568         int x;
 569
 570         x = skb_index + 1;
 571         x &= (arr_len - 1);
 572
 573         pref = skb_array[x];
 574         if (pref) {
 575                 prefetchw(pref);
 576                 prefetchw(pref + EHEA_CACHE_LINE);
 577
 578                 pref = (skb_array[x]->data);
 579                 prefetch(pref);
 580                 prefetch(pref + EHEA_CACHE_LINE);
 581                 prefetch(pref + EHEA_CACHE_LINE * 2);
 582                 prefetch(pref + EHEA_CACHE_LINE * 3);
 583         }
 584
 585         skb = skb_array[skb_index];
 586         skb_array[skb_index] = NULL;
 587         return skb;
 588 }
 589
 590 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 591                                                   int arr_len, int wqe_index)
 592 {
 593         struct sk_buff *skb;
 594         void *pref;
 595         int x;
 596
 597         x = wqe_index + 1;
 598         x &= (arr_len - 1);
 599
 600         pref = skb_array[x];
 601         if (pref) {
 602                 prefetchw(pref);
 603                 prefetchw(pref + EHEA_CACHE_LINE);
 604
 605                 pref = (skb_array[x]->data);
 606                 prefetchw(pref);
 607                 prefetchw(pref + EHEA_CACHE_LINE);
 608         }
 609
 610         skb = skb_array[wqe_index];
 611         skb_array[wqe_index] = NULL;
 612         return skb;
 613 }
 614
 615 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 616                                  struct ehea_cqe *cqe, int *processed_rq2,
 617                                  int *processed_rq3)
 618 {
 619         struct sk_buff *skb;
 620
 621         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 622                 pr->p_stats.err_tcp_cksum++;
 623         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 624                 pr->p_stats.err_ip_cksum++;
 625         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 626                 pr->p_stats.err_frame_crc++;
 627
 628         if (rq == 2) {
 629                 *processed_rq2 += 1;
 630                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 631                 dev_kfree_skb(skb);
 632         } else if (rq == 3) {
 633                 *processed_rq3 += 1;
 634                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 635                 dev_kfree_skb(skb);
 636         }
 637
 638         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 639                 if (netif_msg_rx_err(pr->port)) {
 640                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 641                                pr->qp->init_attr.qp_nr);
 642                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 643                 }
 644                 ehea_schedule_port_reset(pr->port);
 645                 return 1;
 646         }
 647
 648         return 0;
 649 }
 650
 651 static int ehea_proc_rwqes(struct net_device *dev,
 652                            struct ehea_port_res *pr,
 653                            int budget)
 654 {
 655         struct ehea_port *port = pr->port;
 656         struct ehea_qp *qp = pr->qp;
 657         struct ehea_cqe *cqe;
 658         struct sk_buff *skb;
 659         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 660         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 661         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 662         int skb_arr_rq1_len = pr->rq1_skba.len;
 663         int skb_arr_rq2_len = pr->rq2_skba.len;
 664         int skb_arr_rq3_len = pr->rq3_skba.len;
 665         int processed, processed_rq1, processed_rq2, processed_rq3;
 666         u64 processed_bytes = 0;
 667         int wqe_index, last_wqe_index, rq, port_reset;
 668
 669         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 670         last_wqe_index = 0;
 671
 672         cqe = ehea_poll_rq1(qp, &wqe_index);
 673         while ((processed < budget) && cqe) {
 674                 ehea_inc_rq1(qp);
 675                 processed_rq1++;
 676                 processed++;
 677                 if (netif_msg_rx_status(port))
 678                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 679
 680                 last_wqe_index = wqe_index;
 681                 rmb();
 682                 if (!ehea_check_cqe(cqe, &rq)) {
 683                         if (rq == 1) {
 684                                 /* LL RQ1 */
 685                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 686                                                           skb_arr_rq1_len,
 687                                                           wqe_index);
 688                                 if (unlikely(!skb)) {
 689                                         netif_info(port, rx_err, dev,
 690                                                   "LL rq1: skb=NULL\n");
 691
 692                                         skb = netdev_alloc_skb(dev,
 693                                                                EHEA_L_PKT_SIZE);
 694                                         if (!skb)
 695                                                 break;
 696                                 }
 697                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 698                                                  cqe->num_bytes_transfered - 4);
 699                                 ehea_fill_skb(dev, skb, cqe, pr);
 700                         } else if (rq == 2) {
 701                                 /* RQ2 */
 702                                 skb = get_skb_by_index(skb_arr_rq2,
 703                                                        skb_arr_rq2_len, cqe);
 704                                 if (unlikely(!skb)) {
 705                                         netif_err(port, rx_err, dev,
 706                                                   "rq2: skb=NULL\n");
 707                                         break;
 708                                 }
 709                                 ehea_fill_skb(dev, skb, cqe, pr);
 710                                 processed_rq2++;
 711                         } else {
 712                                 /* RQ3 */
 713                                 skb = get_skb_by_index(skb_arr_rq3,
 714                                                        skb_arr_rq3_len, cqe);
 715                                 if (unlikely(!skb)) {
 716                                         netif_err(port, rx_err, dev,
 717                                                   "rq3: skb=NULL\n");
 718                                         break;
 719                                 }
 720                                 ehea_fill_skb(dev, skb, cqe, pr);
 721                                 processed_rq3++;
 722                         }
 723
 724                         processed_bytes += skb->len;
 725
 726                         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 727                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 728                                                        cqe->vlan_tag);
 729
 730                         napi_gro_receive(&pr->napi, skb);
 731                 } else {
 732                         pr->p_stats.poll_receive_errors++;
 733                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 734                                                            &processed_rq2,
 735                                                            &processed_rq3);
 736                         if (port_reset)
 737                                 break;
 738                 }
 739                 cqe = ehea_poll_rq1(qp, &wqe_index);
 740         }
 741
 742         pr->rx_packets += processed;
 743         pr->rx_bytes += processed_bytes;
 744
 745         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 746         ehea_refill_rq2(pr, processed_rq2);
 747         ehea_refill_rq3(pr, processed_rq3);
 748
 749         return processed;
 750 }
 751
 752 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 753
 754 static void reset_sq_restart_flag(struct ehea_port *port)
 755 {
 756         int i;
 757
 758         for (i = 0; i < port->num_def_qps; i++) {
 759                 struct ehea_port_res *pr = &port->port_res[i];
 760                 pr->sq_restart_flag = 0;
 761         }
 762         wake_up(&port->restart_wq);
 763 }
 764
 765 static void check_sqs(struct ehea_port *port)
 766 {
 767         struct ehea_swqe *swqe;
 768         int swqe_index;
 769         int i, k;
 770
 771         for (i = 0; i < port->num_def_qps; i++) {
 772                 struct ehea_port_res *pr = &port->port_res[i];
 773                 int ret;
 774                 k = 0;
 775                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 776                 memset(swqe, 0, SWQE_HEADER_SIZE);
 777                 atomic_dec(&pr->swqe_avail);
 778
 779                 swqe->tx_control |= EHEA_SWQE_PURGE;
 780                 swqe->wr_id = SWQE_RESTART_CHECK;
 781                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 782                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 783                 swqe->immediate_data_length = 80;
 784
 785                 ehea_post_swqe(pr->qp, swqe);
 786
 787                 ret = wait_event_timeout(port->restart_wq,
 788                                          pr->sq_restart_flag == 0,
 789                                          msecs_to_jiffies(100));
 790
 791                 if (!ret) {
 792                         pr_err("HW/SW queues out of sync\n");
 793                         ehea_schedule_port_reset(pr->port);
 794                         return;
 795                 }
 796         }
 797 }
 798
 799
 800 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 801 {
 802         struct sk_buff *skb;
 803         struct ehea_cq *send_cq = pr->send_cq;
 804         struct ehea_cqe *cqe;
 805         int quota = my_quota;
 806         int cqe_counter = 0;
 807         int swqe_av = 0;
 808         int index;
 809         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 810                                                 pr - &pr->port->port_res[0]);
 811
 812         cqe = ehea_poll_cq(send_cq);
 813         while (cqe && (quota > 0)) {
 814                 ehea_inc_cq(send_cq);
 815
 816                 cqe_counter++;
 817                 rmb();
 818
 819                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 820                         pr->sq_restart_flag = 1;
 821                         swqe_av++;
 822                         break;
 823                 }
 824
 825                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 826                         pr_err("Bad send completion status=0x%04X\n",
 827                                cqe->status);
 828
 829                         if (netif_msg_tx_err(pr->port))
 830                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 831
 832                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 833                                 pr_err("Resetting port\n");
 834                                 ehea_schedule_port_reset(pr->port);
 835                                 break;
 836                         }
 837                 }
 838
 839                 if (netif_msg_tx_done(pr->port))
 840                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 841
 842                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 843                            == EHEA_SWQE2_TYPE)) {
 844
 845                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 846                         skb = pr->sq_skba.arr[index];
 847                         dev_kfree_skb(skb);
 848                         pr->sq_skba.arr[index] = NULL;
 849                 }
 850
 851                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 852                 quota--;
 853
 854                 cqe = ehea_poll_cq(send_cq);
 855         }
 856
 857         ehea_update_feca(send_cq, cqe_counter);
 858         atomic_add(swqe_av, &pr->swqe_avail);
 859
 860         if (unlikely(netif_tx_queue_stopped(txq) &&
 861                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 862                 __netif_tx_lock(txq, smp_processor_id());
 863                 if (netif_tx_queue_stopped(txq) &&
 864                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 865                         netif_tx_wake_queue(txq);
 866                 __netif_tx_unlock(txq);
 867         }
 868
 869         wake_up(&pr->port->swqe_avail_wq);
 870
 871         return cqe;
 872 }
 873
 874 #define EHEA_POLL_MAX_CQES 65535
 875
 876 static int ehea_poll(struct napi_struct *napi, int budget)
 877 {
 878         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 879                                                 napi);
 880         struct net_device *dev = pr->port->netdev;
 881         struct ehea_cqe *cqe;
 882         struct ehea_cqe *cqe_skb = NULL;
 883         int wqe_index;
 884         int rx = 0;
 885
 886         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 887         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 888
 889         while (rx != budget) {
 890                 napi_complete(napi);
 891                 ehea_reset_cq_ep(pr->recv_cq);
 892                 ehea_reset_cq_ep(pr->send_cq);
 893                 ehea_reset_cq_n1(pr->recv_cq);
 894                 ehea_reset_cq_n1(pr->send_cq);
 895                 rmb();
 896                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 897                 cqe_skb = ehea_poll_cq(pr->send_cq);
 898
 899                 if (!cqe && !cqe_skb)
 900                         return rx;
 901
 902                 if (!napi_reschedule(napi))
 903                         return rx;
 904
 905                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 906                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 907         }
 908
 909         return rx;
 910 }
 911
 912 #ifdef CONFIG_NET_POLL_CONTROLLER
 913 static void ehea_netpoll(struct net_device *dev)
 914 {
 915         struct ehea_port *port = netdev_priv(dev);
 916         int i;
 917
 918         for (i = 0; i < port->num_def_qps; i++)
 919                 napi_schedule(&port->port_res[i].napi);
 920 }
 921 #endif
 922
 923 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 924 {
 925         struct ehea_port_res *pr = param;
 926
 927         napi_schedule(&pr->napi);
 928
 929         return IRQ_HANDLED;
 930 }
 931
 932 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 933 {
 934         struct ehea_port *port = param;
 935         struct ehea_eqe *eqe;
 936         struct ehea_qp *qp;
 937         u32 qp_token;
 938         u64 resource_type, aer, aerr;
 939         int reset_port = 0;
 940
 941         eqe = ehea_poll_eq(port->qp_eq);
 942
 943         while (eqe) {
 944                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 945                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 946                        eqe->entry, qp_token);
 947
 948                 qp = port->port_res[qp_token].qp;
 949
 950                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 951                                                 &aer, &aerr);
 952
 953                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 954                         if ((aer & EHEA_AER_RESET_MASK) ||
 955                             (aerr & EHEA_AERR_RESET_MASK))
 956                                  reset_port = 1;
 957                 } else
 958                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 959
 960                 eqe = ehea_poll_eq(port->qp_eq);
 961         }
 962
 963         if (reset_port) {
 964                 pr_err("Resetting port\n");
 965                 ehea_schedule_port_reset(port);
 966         }
 967
 968         return IRQ_HANDLED;
 969 }
 970
 971 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 972                                        int logical_port)
 973 {
 974         int i;
 975
 976         for (i = 0; i < EHEA_MAX_PORTS; i++)
 977                 if (adapter->port[i])
 978                         if (adapter->port[i]->logical_port_id == logical_port)
 979                                 return adapter->port[i];
 980         return NULL;
 981 }
 982
 983 int ehea_sense_port_attr(struct ehea_port *port)
 984 {
 985         int ret;
 986         u64 hret;
 987         struct hcp_ehea_port_cb0 *cb0;
 988
 989         /* may be called via ehea_neq_tasklet() */
 990         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 991         if (!cb0) {
 992                 pr_err("no mem for cb0\n");
 993                 ret = -ENOMEM;
 994                 goto out;
 995         }
 996
 997         hret = ehea_h_query_ehea_port(port->adapter->handle,
 998                                       port->logical_port_id, H_PORT_CB0,
 999                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1000                                       cb0);
1001         if (hret != H_SUCCESS) {
1002                 ret = -EIO;
1003                 goto out_free;
1004         }
1005
1006         /* MAC address */
1007         port->mac_addr = cb0->port_mac_addr << 16;
1008
1009         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1010                 ret = -EADDRNOTAVAIL;
1011                 goto out_free;
1012         }
1013
1014         /* Port speed */
1015         switch (cb0->port_speed) {
1016         case H_SPEED_10M_H:
1017                 port->port_speed = EHEA_SPEED_10M;
1018                 port->full_duplex = 0;
1019                 break;
1020         case H_SPEED_10M_F:
1021                 port->port_speed = EHEA_SPEED_10M;
1022                 port->full_duplex = 1;
1023                 break;
1024         case H_SPEED_100M_H:
1025                 port->port_speed = EHEA_SPEED_100M;
1026                 port->full_duplex = 0;
1027                 break;
1028         case H_SPEED_100M_F:
1029                 port->port_speed = EHEA_SPEED_100M;
1030                 port->full_duplex = 1;
1031                 break;
1032         case H_SPEED_1G_F:
1033                 port->port_speed = EHEA_SPEED_1G;
1034                 port->full_duplex = 1;
1035                 break;
1036         case H_SPEED_10G_F:
1037                 port->port_speed = EHEA_SPEED_10G;
1038                 port->full_duplex = 1;
1039                 break;
1040         default:
1041                 port->port_speed = 0;
1042                 port->full_duplex = 0;
1043                 break;
1044         }
1045
1046         port->autoneg = 1;
1047         port->num_mcs = cb0->num_default_qps;
1048
1049         /* Number of default QPs */
1050         if (use_mcs)
1051                 port->num_def_qps = cb0->num_default_qps;
1052         else
1053                 port->num_def_qps = 1;
1054
1055         if (!port->num_def_qps) {
1056                 ret = -EINVAL;
1057                 goto out_free;
1058         }
1059
1060         ret = 0;
1061 out_free:
1062         if (ret || netif_msg_probe(port))
1063                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1064         free_page((unsigned long)cb0);
1065 out:
1066         return ret;
1067 }
1068
1069 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1070 {
1071         struct hcp_ehea_port_cb4 *cb4;
1072         u64 hret;
1073         int ret = 0;
1074
1075         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1076         if (!cb4) {
1077                 pr_err("no mem for cb4\n");
1078                 ret = -ENOMEM;
1079                 goto out;
1080         }
1081
1082         cb4->port_speed = port_speed;
1083
1084         netif_carrier_off(port->netdev);
1085
1086         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1087                                        port->logical_port_id,
1088                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1089         if (hret == H_SUCCESS) {
1090                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1091
1092                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1093                                               port->logical_port_id,
1094                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1095                                               cb4);
1096                 if (hret == H_SUCCESS) {
1097                         switch (cb4->port_speed) {
1098                         case H_SPEED_10M_H:
1099                                 port->port_speed = EHEA_SPEED_10M;
1100                                 port->full_duplex = 0;
1101                                 break;
1102                         case H_SPEED_10M_F:
1103                                 port->port_speed = EHEA_SPEED_10M;
1104                                 port->full_duplex = 1;
1105                                 break;
1106                         case H_SPEED_100M_H:
1107                                 port->port_speed = EHEA_SPEED_100M;
1108                                 port->full_duplex = 0;
1109                                 break;
1110                         case H_SPEED_100M_F:
1111                                 port->port_speed = EHEA_SPEED_100M;
1112                                 port->full_duplex = 1;
1113                                 break;
1114                         case H_SPEED_1G_F:
1115                                 port->port_speed = EHEA_SPEED_1G;
1116                                 port->full_duplex = 1;
1117                                 break;
1118                         case H_SPEED_10G_F:
1119                                 port->port_speed = EHEA_SPEED_10G;
1120                                 port->full_duplex = 1;
1121                                 break;
1122                         default:
1123                                 port->port_speed = 0;
1124                                 port->full_duplex = 0;
1125                                 break;
1126                         }
1127                 } else {
1128                         pr_err("Failed sensing port speed\n");
1129                         ret = -EIO;
1130                 }
1131         } else {
1132                 if (hret == H_AUTHORITY) {
1133                         pr_info("Hypervisor denied setting port speed\n");
1134                         ret = -EPERM;
1135                 } else {
1136                         ret = -EIO;
1137                         pr_err("Failed setting port speed\n");
1138                 }
1139         }
1140         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1141                 netif_carrier_on(port->netdev);
1142
1143         free_page((unsigned long)cb4);
1144 out:
1145         return ret;
1146 }
1147
1148 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1149 {
1150         int ret;
1151         u8 ec;
1152         u8 portnum;
1153         struct ehea_port *port;
1154         struct net_device *dev;
1155
1156         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1157         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1158         port = ehea_get_port(adapter, portnum);
1159         dev = port->netdev;
1160
1161         switch (ec) {
1162         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1163
1164                 if (!port) {
1165                         netdev_err(dev, "unknown portnum %x\n", portnum);
1166                         break;
1167                 }
1168
1169                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1170                         if (!netif_carrier_ok(dev)) {
1171                                 ret = ehea_sense_port_attr(port);
1172                                 if (ret) {
1173                                         netdev_err(dev, "failed resensing port attributes\n");
1174                                         break;
1175                                 }
1176
1177                                 netif_info(port, link, dev,
1178                                            "Logical port up: %dMbps %s Duplex\n",
1179                                            port->port_speed,
1180                                            port->full_duplex == 1 ?
1181                                            "Full" : "Half");
1182
1183                                 netif_carrier_on(dev);
1184                                 netif_wake_queue(dev);
1185                         }
1186                 } else
1187                         if (netif_carrier_ok(dev)) {
1188                                 netif_info(port, link, dev,
1189                                            "Logical port down\n");
1190                                 netif_carrier_off(dev);
1191                                 netif_tx_disable(dev);
1192                         }
1193
1194                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1195                         port->phy_link = EHEA_PHY_LINK_UP;
1196                         netif_info(port, link, dev,
1197                                    "Physical port up\n");
1198                         if (prop_carrier_state)
1199                                 netif_carrier_on(dev);
1200                 } else {
1201                         port->phy_link = EHEA_PHY_LINK_DOWN;
1202                         netif_info(port, link, dev,
1203                                    "Physical port down\n");
1204                         if (prop_carrier_state)
1205                                 netif_carrier_off(dev);
1206                 }
1207
1208                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1209                         netdev_info(dev,
1210                                     "External switch port is primary port\n");
1211                 else
1212                         netdev_info(dev,
1213                                     "External switch port is backup port\n");
1214
1215                 break;
1216         case EHEA_EC_ADAPTER_MALFUNC:
1217                 netdev_err(dev, "Adapter malfunction\n");
1218                 break;
1219         case EHEA_EC_PORT_MALFUNC:
1220                 netdev_info(dev, "Port malfunction\n");
1221                 netif_carrier_off(dev);
1222                 netif_tx_disable(dev);
1223                 break;
1224         default:
1225                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1226                 break;
1227         }
1228 }
1229
1230 static void ehea_neq_tasklet(unsigned long data)
1231 {
1232         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1233         struct ehea_eqe *eqe;
1234         u64 event_mask;
1235
1236         eqe = ehea_poll_eq(adapter->neq);
1237         pr_debug("eqe=%p\n", eqe);
1238
1239         while (eqe) {
1240                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1241                 ehea_parse_eqe(adapter, eqe->entry);
1242                 eqe = ehea_poll_eq(adapter->neq);
1243                 pr_debug("next eqe=%p\n", eqe);
1244         }
1245
1246         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1247                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1248                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1249
1250         ehea_h_reset_events(adapter->handle,
1251                             adapter->neq->fw_handle, event_mask);
1252 }
1253
1254 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1255 {
1256         struct ehea_adapter *adapter = param;
1257         tasklet_hi_schedule(&adapter->neq_tasklet);
1258         return IRQ_HANDLED;
1259 }
1260
1261
1262 static int ehea_fill_port_res(struct ehea_port_res *pr)
1263 {
1264         int ret;
1265         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1266
1267         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1268
1269         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1270
1271         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1272
1273         return ret;
1274 }
1275
1276 static int ehea_reg_interrupts(struct net_device *dev)
1277 {
1278         struct ehea_port *port = netdev_priv(dev);
1279         struct ehea_port_res *pr;
1280         int i, ret;
1281
1282
1283         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1284                  dev->name);
1285
1286         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1287                                   ehea_qp_aff_irq_handler,
1288                                   IRQF_DISABLED, port->int_aff_name, port);
1289         if (ret) {
1290                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1291                            port->qp_eq->attr.ist1);
1292                 goto out_free_qpeq;
1293         }
1294
1295         netif_info(port, ifup, dev,
1296                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1297                    port->qp_eq->attr.ist1);
1298
1299
1300         for (i = 0; i < port->num_def_qps; i++) {
1301                 pr = &port->port_res[i];
1302                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1303                          "%s-queue%d", dev->name, i);
1304                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1305                                           ehea_recv_irq_handler,
1306                                           IRQF_DISABLED, pr->int_send_name,
1307                                           pr);
1308                 if (ret) {
1309                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1310                                    i, pr->eq->attr.ist1);
1311                         goto out_free_req;
1312                 }
1313                 netif_info(port, ifup, dev,
1314                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1315                            pr->eq->attr.ist1, i);
1316         }
1317 out:
1318         return ret;
1319
1320
1321 out_free_req:
1322         while (--i >= 0) {
1323                 u32 ist = port->port_res[i].eq->attr.ist1;
1324                 ibmebus_free_irq(ist, &port->port_res[i]);
1325         }
1326
1327 out_free_qpeq:
1328         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1329         i = port->num_def_qps;
1330
1331         goto out;
1332
1333 }
1334
1335 static void ehea_free_interrupts(struct net_device *dev)
1336 {
1337         struct ehea_port *port = netdev_priv(dev);
1338         struct ehea_port_res *pr;
1339         int i;
1340
1341         /* send */
1342
1343         for (i = 0; i < port->num_def_qps; i++) {
1344                 pr = &port->port_res[i];
1345                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1346                 netif_info(port, intr, dev,
1347                            "free send irq for res %d with handle 0x%X\n",
1348                            i, pr->eq->attr.ist1);
1349         }
1350
1351         /* associated events */
1352         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1353         netif_info(port, intr, dev,
1354                    "associated event interrupt for handle 0x%X freed\n",
1355                    port->qp_eq->attr.ist1);
1356 }
1357
1358 static int ehea_configure_port(struct ehea_port *port)
1359 {
1360         int ret, i;
1361         u64 hret, mask;
1362         struct hcp_ehea_port_cb0 *cb0;
1363
1364         ret = -ENOMEM;
1365         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1366         if (!cb0)
1367                 goto out;
1368
1369         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1370                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1371                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1372                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1373                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1374                                       PXLY_RC_VLAN_FILTER)
1375                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1376
1377         for (i = 0; i < port->num_mcs; i++)
1378                 if (use_mcs)
1379                         cb0->default_qpn_arr[i] =
1380                                 port->port_res[i].qp->init_attr.qp_nr;
1381                 else
1382                         cb0->default_qpn_arr[i] =
1383                                 port->port_res[0].qp->init_attr.qp_nr;
1384
1385         if (netif_msg_ifup(port))
1386                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1387
1388         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1389              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1390
1391         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1392                                        port->logical_port_id,
1393                                        H_PORT_CB0, mask, cb0);
1394         ret = -EIO;
1395         if (hret != H_SUCCESS)
1396                 goto out_free;
1397
1398         ret = 0;
1399
1400 out_free:
1401         free_page((unsigned long)cb0);
1402 out:
1403         return ret;
1404 }
1405
1406 static int ehea_gen_smrs(struct ehea_port_res *pr)
1407 {
1408         int ret;
1409         struct ehea_adapter *adapter = pr->port->adapter;
1410
1411         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1412         if (ret)
1413                 goto out;
1414
1415         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1416         if (ret)
1417                 goto out_free;
1418
1419         return 0;
1420
1421 out_free:
1422         ehea_rem_mr(&pr->send_mr);
1423 out:
1424         pr_err("Generating SMRS failed\n");
1425         return -EIO;
1426 }
1427
1428 static int ehea_rem_smrs(struct ehea_port_res *pr)
1429 {
1430         if ((ehea_rem_mr(&pr->send_mr)) ||
1431             (ehea_rem_mr(&pr->recv_mr)))
1432                 return -EIO;
1433         else
1434                 return 0;
1435 }
1436
1437 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1438 {
1439         int arr_size = sizeof(void *) * max_q_entries;
1440
1441         q_skba->arr = vzalloc(arr_size);
1442         if (!q_skba->arr)
1443                 return -ENOMEM;
1444
1445         q_skba->len = max_q_entries;
1446         q_skba->index = 0;
1447         q_skba->os_skbs = 0;
1448
1449         return 0;
1450 }
1451
1452 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1453                               struct port_res_cfg *pr_cfg, int queue_token)
1454 {
1455         struct ehea_adapter *adapter = port->adapter;
1456         enum ehea_eq_type eq_type = EHEA_EQ;
1457         struct ehea_qp_init_attr *init_attr = NULL;
1458         int ret = -EIO;
1459         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1460
1461         tx_bytes = pr->tx_bytes;
1462         tx_packets = pr->tx_packets;
1463         rx_bytes = pr->rx_bytes;
1464         rx_packets = pr->rx_packets;
1465
1466         memset(pr, 0, sizeof(struct ehea_port_res));
1467
1468         pr->tx_bytes = rx_bytes;
1469         pr->tx_packets = tx_packets;
1470         pr->rx_bytes = rx_bytes;
1471         pr->rx_packets = rx_packets;
1472
1473         pr->port = port;
1474
1475         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1476         if (!pr->eq) {
1477                 pr_err("create_eq failed (eq)\n");
1478                 goto out_free;
1479         }
1480
1481         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1482                                      pr->eq->fw_handle,
1483                                      port->logical_port_id);
1484         if (!pr->recv_cq) {
1485                 pr_err("create_cq failed (cq_recv)\n");
1486                 goto out_free;
1487         }
1488
1489         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1490                                      pr->eq->fw_handle,
1491                                      port->logical_port_id);
1492         if (!pr->send_cq) {
1493                 pr_err("create_cq failed (cq_send)\n");
1494                 goto out_free;
1495         }
1496
1497         if (netif_msg_ifup(port))
1498                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1499                         pr->send_cq->attr.act_nr_of_cqes,
1500                         pr->recv_cq->attr.act_nr_of_cqes);
1501
1502         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1503         if (!init_attr) {
1504                 ret = -ENOMEM;
1505                 pr_err("no mem for ehea_qp_init_attr\n");
1506                 goto out_free;
1507         }
1508
1509         init_attr->low_lat_rq1 = 1;
1510         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1511         init_attr->rq_count = 3;
1512         init_attr->qp_token = queue_token;
1513         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1514         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1515         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1516         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1517         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1518         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1519         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1520         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1521         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1522         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1523         init_attr->port_nr = port->logical_port_id;
1524         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1525         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1526         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1527
1528         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1529         if (!pr->qp) {
1530                 pr_err("create_qp failed\n");
1531                 ret = -EIO;
1532                 goto out_free;
1533         }
1534
1535         if (netif_msg_ifup(port))
1536                 pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",
1537                         init_attr->qp_nr,
1538                         init_attr->act_nr_send_wqes,
1539                         init_attr->act_nr_rwqes_rq1,
1540                         init_attr->act_nr_rwqes_rq2,
1541                         init_attr->act_nr_rwqes_rq3);
1542
1543         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1544
1545         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1546         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1547         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1548         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1549         if (ret)
1550                 goto out_free;
1551
1552         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1553         if (ehea_gen_smrs(pr) != 0) {
1554                 ret = -EIO;
1555                 goto out_free;
1556         }
1557
1558         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1559
1560         kfree(init_attr);
1561
1562         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1563
1564         ret = 0;
1565         goto out;
1566
1567 out_free:
1568         kfree(init_attr);
1569         vfree(pr->sq_skba.arr);
1570         vfree(pr->rq1_skba.arr);
1571         vfree(pr->rq2_skba.arr);
1572         vfree(pr->rq3_skba.arr);
1573         ehea_destroy_qp(pr->qp);
1574         ehea_destroy_cq(pr->send_cq);
1575         ehea_destroy_cq(pr->recv_cq);
1576         ehea_destroy_eq(pr->eq);
1577 out:
1578         return ret;
1579 }
1580
1581 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1582 {
1583         int ret, i;
1584
1585         if (pr->qp)
1586                 netif_napi_del(&pr->napi);
1587
1588         ret = ehea_destroy_qp(pr->qp);
1589
1590         if (!ret) {
1591                 ehea_destroy_cq(pr->send_cq);
1592                 ehea_destroy_cq(pr->recv_cq);
1593                 ehea_destroy_eq(pr->eq);
1594
1595                 for (i = 0; i < pr->rq1_skba.len; i++)
1596                         if (pr->rq1_skba.arr[i])
1597                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1598
1599                 for (i = 0; i < pr->rq2_skba.len; i++)
1600                         if (pr->rq2_skba.arr[i])
1601                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1602
1603                 for (i = 0; i < pr->rq3_skba.len; i++)
1604                         if (pr->rq3_skba.arr[i])
1605                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1606
1607                 for (i = 0; i < pr->sq_skba.len; i++)
1608                         if (pr->sq_skba.arr[i])
1609                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1610
1611                 vfree(pr->rq1_skba.arr);
1612                 vfree(pr->rq2_skba.arr);
1613                 vfree(pr->rq3_skba.arr);
1614                 vfree(pr->sq_skba.arr);
1615                 ret = ehea_rem_smrs(pr);
1616         }
1617         return ret;
1618 }
1619
1620 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1621                                   u32 lkey)
1622 {
1623         int skb_data_size = skb_headlen(skb);
1624         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1625         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1626         unsigned int immediate_len = SWQE2_MAX_IMM;
1627
1628         swqe->descriptors = 0;
1629
1630         if (skb_is_gso(skb)) {
1631                 swqe->tx_control |= EHEA_SWQE_TSO;
1632                 swqe->mss = skb_shinfo(skb)->gso_size;
1633                 /*
1634                  * For TSO packets we only copy the headers into the
1635                  * immediate area.
1636                  */
1637                 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1638         }
1639
1640         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1641                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1642                 swqe->immediate_data_length = immediate_len;
1643
1644                 if (skb_data_size > immediate_len) {
1645                         sg1entry->l_key = lkey;
1646                         sg1entry->len = skb_data_size - immediate_len;
1647                         sg1entry->vaddr =
1648                                 ehea_map_vaddr(skb->data + immediate_len);
1649                         swqe->descriptors++;
1650                 }
1651         } else {
1652                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1653                 swqe->immediate_data_length = skb_data_size;
1654         }
1655 }
1656
1657 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1658                                     struct ehea_swqe *swqe, u32 lkey)
1659 {
1660         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1661         skb_frag_t *frag;
1662         int nfrags, sg1entry_contains_frag_data, i;
1663
1664         nfrags = skb_shinfo(skb)->nr_frags;
1665         sg1entry = &swqe->u.immdata_desc.sg_entry;
1666         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1667         sg1entry_contains_frag_data = 0;
1668
1669         write_swqe2_immediate(skb, swqe, lkey);
1670
1671         /* write descriptors */
1672         if (nfrags > 0) {
1673                 if (swqe->descriptors == 0) {
1674                         /* sg1entry not yet used */
1675                         frag = &skb_shinfo(skb)->frags[0];
1676
1677                         /* copy sg1entry data */
1678                         sg1entry->l_key = lkey;
1679                         sg1entry->len = skb_frag_size(frag);
1680                         sg1entry->vaddr =
1681                                 ehea_map_vaddr(skb_frag_address(frag));
1682                         swqe->descriptors++;
1683                         sg1entry_contains_frag_data = 1;
1684                 }
1685
1686                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1687
1688                         frag = &skb_shinfo(skb)->frags[i];
1689                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1690
1691                         sgentry->l_key = lkey;
1692                         sgentry->len = skb_frag_size(frag);
1693                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1694                         swqe->descriptors++;
1695                 }
1696         }
1697 }
1698
1699 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1700 {
1701         int ret = 0;
1702         u64 hret;
1703         u8 reg_type;
1704
1705         /* De/Register untagged packets */
1706         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1707         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1708                                      port->logical_port_id,
1709                                      reg_type, port->mac_addr, 0, hcallid);
1710         if (hret != H_SUCCESS) {
1711                 pr_err("%sregistering bc address failed (tagged)\n",
1712                        hcallid == H_REG_BCMC ? "" : "de");
1713                 ret = -EIO;
1714                 goto out_herr;
1715         }
1716
1717         /* De/Register VLAN packets */
1718         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1719         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1720                                      port->logical_port_id,
1721                                      reg_type, port->mac_addr, 0, hcallid);
1722         if (hret != H_SUCCESS) {
1723                 pr_err("%sregistering bc address failed (vlan)\n",
1724                        hcallid == H_REG_BCMC ? "" : "de");
1725                 ret = -EIO;
1726         }
1727 out_herr:
1728         return ret;
1729 }
1730
1731 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1732 {
1733         struct ehea_port *port = netdev_priv(dev);
1734         struct sockaddr *mac_addr = sa;
1735         struct hcp_ehea_port_cb0 *cb0;
1736         int ret;
1737         u64 hret;
1738
1739         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1740                 ret = -EADDRNOTAVAIL;
1741                 goto out;
1742         }
1743
1744         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1745         if (!cb0) {
1746                 pr_err("no mem for cb0\n");
1747                 ret = -ENOMEM;
1748                 goto out;
1749         }
1750
1751         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1752
1753         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1754
1755         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1756                                        port->logical_port_id, H_PORT_CB0,
1757                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1758         if (hret != H_SUCCESS) {
1759                 ret = -EIO;
1760                 goto out_free;
1761         }
1762
1763         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1764
1765         /* Deregister old MAC in pHYP */
1766         if (port->state == EHEA_PORT_UP) {
1767                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1768                 if (ret)
1769                         goto out_upregs;
1770         }
1771
1772         port->mac_addr = cb0->port_mac_addr << 16;
1773
1774         /* Register new MAC in pHYP */
1775         if (port->state == EHEA_PORT_UP) {
1776                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1777                 if (ret)
1778                         goto out_upregs;
1779         }
1780
1781         ret = 0;
1782
1783 out_upregs:
1784         ehea_update_bcmc_registrations();
1785 out_free:
1786         free_page((unsigned long)cb0);
1787 out:
1788         return ret;
1789 }
1790
1791 static void ehea_promiscuous_error(u64 hret, int enable)
1792 {
1793         if (hret == H_AUTHORITY)
1794                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1795                         enable == 1 ? "en" : "dis");
1796         else
1797                 pr_err("failed %sabling promiscuous mode\n",
1798                        enable == 1 ? "en" : "dis");
1799 }
1800
1801 static void ehea_promiscuous(struct net_device *dev, int enable)
1802 {
1803         struct ehea_port *port = netdev_priv(dev);
1804         struct hcp_ehea_port_cb7 *cb7;
1805         u64 hret;
1806
1807         if (enable == port->promisc)
1808                 return;
1809
1810         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1811         if (!cb7) {
1812                 pr_err("no mem for cb7\n");
1813                 goto out;
1814         }
1815
1816         /* Modify Pxs_DUCQPN in CB7 */
1817         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1818
1819         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1820                                        port->logical_port_id,
1821                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1822         if (hret) {
1823                 ehea_promiscuous_error(hret, enable);
1824                 goto out;
1825         }
1826
1827         port->promisc = enable;
1828 out:
1829         free_page((unsigned long)cb7);
1830 }
1831
1832 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1833                                      u32 hcallid)
1834 {
1835         u64 hret;
1836         u8 reg_type;
1837
1838         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1839         if (mc_mac_addr == 0)
1840                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1841
1842         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1843                                      port->logical_port_id,
1844                                      reg_type, mc_mac_addr, 0, hcallid);
1845         if (hret)
1846                 goto out;
1847
1848         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1849         if (mc_mac_addr == 0)
1850                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1851
1852         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1853                                      port->logical_port_id,
1854                                      reg_type, mc_mac_addr, 0, hcallid);
1855 out:
1856         return hret;
1857 }
1858
1859 static int ehea_drop_multicast_list(struct net_device *dev)
1860 {
1861         struct ehea_port *port = netdev_priv(dev);
1862         struct ehea_mc_list *mc_entry = port->mc_list;
1863         struct list_head *pos;
1864         struct list_head *temp;
1865         int ret = 0;
1866         u64 hret;
1867
1868         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1869                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1870
1871                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1872                                                  H_DEREG_BCMC);
1873                 if (hret) {
1874                         pr_err("failed deregistering mcast MAC\n");
1875                         ret = -EIO;
1876                 }
1877
1878                 list_del(pos);
1879                 kfree(mc_entry);
1880         }
1881         return ret;
1882 }
1883
1884 static void ehea_allmulti(struct net_device *dev, int enable)
1885 {
1886         struct ehea_port *port = netdev_priv(dev);
1887         u64 hret;
1888
1889         if (!port->allmulti) {
1890                 if (enable) {
1891                         /* Enable ALLMULTI */
1892                         ehea_drop_multicast_list(dev);
1893                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1894                         if (!hret)
1895                                 port->allmulti = 1;
1896                         else
1897                                 netdev_err(dev,
1898                                            "failed enabling IFF_ALLMULTI\n");
1899                 }
1900         } else {
1901                 if (!enable) {
1902                         /* Disable ALLMULTI */
1903                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1904                         if (!hret)
1905                                 port->allmulti = 0;
1906                         else
1907                                 netdev_err(dev,
1908                                            "failed disabling IFF_ALLMULTI\n");
1909                 }
1910         }
1911 }
1912
1913 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1914 {
1915         struct ehea_mc_list *ehea_mcl_entry;
1916         u64 hret;
1917
1918         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1919         if (!ehea_mcl_entry)
1920                 return;
1921
1922         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1923
1924         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1925
1926         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1927                                          H_REG_BCMC);
1928         if (!hret)
1929                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1930         else {
1931                 pr_err("failed registering mcast MAC\n");
1932                 kfree(ehea_mcl_entry);
1933         }
1934 }
1935
1936 static void ehea_set_multicast_list(struct net_device *dev)
1937 {
1938         struct ehea_port *port = netdev_priv(dev);
1939         struct netdev_hw_addr *ha;
1940         int ret;
1941
1942         ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1943
1944         if (dev->flags & IFF_ALLMULTI) {
1945                 ehea_allmulti(dev, 1);
1946                 goto out;
1947         }
1948         ehea_allmulti(dev, 0);
1949
1950         if (!netdev_mc_empty(dev)) {
1951                 ret = ehea_drop_multicast_list(dev);
1952                 if (ret) {
1953                         /* Dropping the current multicast list failed.
1954                          * Enabling ALL_MULTI is the best we can do.
1955                          */
1956                         ehea_allmulti(dev, 1);
1957                 }
1958
1959                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1960                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1961                                 port->adapter->max_mc_mac);
1962                         goto out;
1963                 }
1964
1965                 netdev_for_each_mc_addr(ha, dev)
1966                         ehea_add_multicast_entry(port, ha->addr);
1967
1968         }
1969 out:
1970         ehea_update_bcmc_registrations();
1971 }
1972
1973 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1974 {
1975         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1976                 return -EINVAL;
1977         dev->mtu = new_mtu;
1978         return 0;
1979 }
1980
1981 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1982 {
1983         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1984
1985         if (skb->protocol != htons(ETH_P_IP))
1986                 return;
1987
1988         if (skb->ip_summed == CHECKSUM_PARTIAL)
1989                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1990
1991         swqe->ip_start = skb_network_offset(skb);
1992         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1993
1994         switch (ip_hdr(skb)->protocol) {
1995         case IPPROTO_UDP:
1996                 if (skb->ip_summed == CHECKSUM_PARTIAL)
1997                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1998
1999                 swqe->tcp_offset = swqe->ip_end + 1 +
2000                                    offsetof(struct udphdr, check);
2001                 break;
2002
2003         case IPPROTO_TCP:
2004                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2005                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2006
2007                 swqe->tcp_offset = swqe->ip_end + 1 +
2008                                    offsetof(struct tcphdr, check);
2009                 break;
2010         }
2011 }
2012
2013 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2014                        struct ehea_swqe *swqe, u32 lkey)
2015 {
2016         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2017
2018         xmit_common(skb, swqe);
2019
2020         write_swqe2_data(skb, dev, swqe, lkey);
2021 }
2022
2023 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2024                        struct ehea_swqe *swqe)
2025 {
2026         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2027
2028         xmit_common(skb, swqe);
2029
2030         if (!skb->data_len)
2031                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2032         else
2033                 skb_copy_bits(skb, 0, imm_data, skb->len);
2034
2035         swqe->immediate_data_length = skb->len;
2036         dev_kfree_skb(skb);
2037 }
2038
2039 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2040 {
2041         struct ehea_port *port = netdev_priv(dev);
2042         struct ehea_swqe *swqe;
2043         u32 lkey;
2044         int swqe_index;
2045         struct ehea_port_res *pr;
2046         struct netdev_queue *txq;
2047
2048         pr = &port->port_res[skb_get_queue_mapping(skb)];
2049         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2050
2051         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2052         memset(swqe, 0, SWQE_HEADER_SIZE);
2053         atomic_dec(&pr->swqe_avail);
2054
2055         if (vlan_tx_tag_present(skb)) {
2056                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2057                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2058         }
2059
2060         pr->tx_packets++;
2061         pr->tx_bytes += skb->len;
2062
2063         if (skb->len <= SWQE3_MAX_IMM) {
2064                 u32 sig_iv = port->sig_comp_iv;
2065                 u32 swqe_num = pr->swqe_id_counter;
2066                 ehea_xmit3(skb, dev, swqe);
2067                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2068                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2069                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2070                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2071                                                       sig_iv);
2072                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2073                         pr->swqe_ll_count = 0;
2074                 } else
2075                         pr->swqe_ll_count += 1;
2076         } else {
2077                 swqe->wr_id =
2078                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2079                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2080                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2081                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2082                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2083
2084                 pr->sq_skba.index++;
2085                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2086
2087                 lkey = pr->send_mr.lkey;
2088                 ehea_xmit2(skb, dev, swqe, lkey);
2089                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2090         }
2091         pr->swqe_id_counter += 1;
2092
2093         netif_info(port, tx_queued, dev,
2094                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2095         if (netif_msg_tx_queued(port))
2096                 ehea_dump(swqe, 512, "swqe");
2097
2098         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2099                 netif_tx_stop_queue(txq);
2100                 swqe->tx_control |= EHEA_SWQE_PURGE;
2101         }
2102
2103         ehea_post_swqe(pr->qp, swqe);
2104
2105         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2106                 pr->p_stats.queue_stopped++;
2107                 netif_tx_stop_queue(txq);
2108         }
2109
2110         return NETDEV_TX_OK;
2111 }
2112
2113 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2114 {
2115         struct ehea_port *port = netdev_priv(dev);
2116         struct ehea_adapter *adapter = port->adapter;
2117         struct hcp_ehea_port_cb1 *cb1;
2118         int index;
2119         u64 hret;
2120         int err = 0;
2121
2122         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2123         if (!cb1) {
2124                 pr_err("no mem for cb1\n");
2125                 err = -ENOMEM;
2126                 goto out;
2127         }
2128
2129         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2130                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2131         if (hret != H_SUCCESS) {
2132                 pr_err("query_ehea_port failed\n");
2133                 err = -EINVAL;
2134                 goto out;
2135         }
2136
2137         index = (vid / 64);
2138         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2139
2140         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2141                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2142         if (hret != H_SUCCESS) {
2143                 pr_err("modify_ehea_port failed\n");
2144                 err = -EINVAL;
2145         }
2146 out:
2147         free_page((unsigned long)cb1);
2148         return err;
2149 }
2150
2151 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2152 {
2153         struct ehea_port *port = netdev_priv(dev);
2154         struct ehea_adapter *adapter = port->adapter;
2155         struct hcp_ehea_port_cb1 *cb1;
2156         int index;
2157         u64 hret;
2158         int err = 0;
2159
2160         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2161         if (!cb1) {
2162                 pr_err("no mem for cb1\n");
2163                 err = -ENOMEM;
2164                 goto out;
2165         }
2166
2167         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2168                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2169         if (hret != H_SUCCESS) {
2170                 pr_err("query_ehea_port failed\n");
2171                 err = -EINVAL;
2172                 goto out;
2173         }
2174
2175         index = (vid / 64);
2176         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2177
2178         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2179                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2180         if (hret != H_SUCCESS) {
2181                 pr_err("modify_ehea_port failed\n");
2182                 err = -EINVAL;
2183         }
2184 out:
2185         free_page((unsigned long)cb1);
2186         return err;
2187 }
2188
2189 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2190 {
2191         int ret = -EIO;
2192         u64 hret;
2193         u16 dummy16 = 0;
2194         u64 dummy64 = 0;
2195         struct hcp_modify_qp_cb0 *cb0;
2196
2197         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2198         if (!cb0) {
2199                 ret = -ENOMEM;
2200                 goto out;
2201         }
2202
2203         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2204                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2205         if (hret != H_SUCCESS) {
2206                 pr_err("query_ehea_qp failed (1)\n");
2207                 goto out;
2208         }
2209
2210         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2211         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2212                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2213                                      &dummy64, &dummy64, &dummy16, &dummy16);
2214         if (hret != H_SUCCESS) {
2215                 pr_err("modify_ehea_qp failed (1)\n");
2216                 goto out;
2217         }
2218
2219         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2220                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2221         if (hret != H_SUCCESS) {
2222                 pr_err("query_ehea_qp failed (2)\n");
2223                 goto out;
2224         }
2225
2226         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2227         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2228                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2229                                      &dummy64, &dummy64, &dummy16, &dummy16);
2230         if (hret != H_SUCCESS) {
2231                 pr_err("modify_ehea_qp failed (2)\n");
2232                 goto out;
2233         }
2234
2235         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2236                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2237         if (hret != H_SUCCESS) {
2238                 pr_err("query_ehea_qp failed (3)\n");
2239                 goto out;
2240         }
2241
2242         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2243         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2244                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2245                                      &dummy64, &dummy64, &dummy16, &dummy16);
2246         if (hret != H_SUCCESS) {
2247                 pr_err("modify_ehea_qp failed (3)\n");
2248                 goto out;
2249         }
2250
2251         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2252                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2253         if (hret != H_SUCCESS) {
2254                 pr_err("query_ehea_qp failed (4)\n");
2255                 goto out;
2256         }
2257
2258         ret = 0;
2259 out:
2260         free_page((unsigned long)cb0);
2261         return ret;
2262 }
2263
2264 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2265 {
2266         int ret, i;
2267         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2268         enum ehea_eq_type eq_type = EHEA_EQ;
2269
2270         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2271                                    EHEA_MAX_ENTRIES_EQ, 1);
2272         if (!port->qp_eq) {
2273                 ret = -EINVAL;
2274                 pr_err("ehea_create_eq failed (qp_eq)\n");
2275                 goto out_kill_eq;
2276         }
2277
2278         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2279         pr_cfg.max_entries_scq = sq_entries * 2;
2280         pr_cfg.max_entries_sq = sq_entries;
2281         pr_cfg.max_entries_rq1 = rq1_entries;
2282         pr_cfg.max_entries_rq2 = rq2_entries;
2283         pr_cfg.max_entries_rq3 = rq3_entries;
2284
2285         pr_cfg_small_rx.max_entries_rcq = 1;
2286         pr_cfg_small_rx.max_entries_scq = sq_entries;
2287         pr_cfg_small_rx.max_entries_sq = sq_entries;
2288         pr_cfg_small_rx.max_entries_rq1 = 1;
2289         pr_cfg_small_rx.max_entries_rq2 = 1;
2290         pr_cfg_small_rx.max_entries_rq3 = 1;
2291
2292         for (i = 0; i < def_qps; i++) {
2293                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2294                 if (ret)
2295                         goto out_clean_pr;
2296         }
2297         for (i = def_qps; i < def_qps; i++) {
2298                 ret = ehea_init_port_res(port, &port->port_res[i],
2299                                          &pr_cfg_small_rx, i);
2300                 if (ret)
2301                         goto out_clean_pr;
2302         }
2303
2304         return 0;
2305
2306 out_clean_pr:
2307         while (--i >= 0)
2308                 ehea_clean_portres(port, &port->port_res[i]);
2309
2310 out_kill_eq:
2311         ehea_destroy_eq(port->qp_eq);
2312         return ret;
2313 }
2314
2315 static int ehea_clean_all_portres(struct ehea_port *port)
2316 {
2317         int ret = 0;
2318         int i;
2319
2320         for (i = 0; i < port->num_def_qps; i++)
2321                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2322
2323         ret |= ehea_destroy_eq(port->qp_eq);
2324
2325         return ret;
2326 }
2327
2328 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2329 {
2330         if (adapter->active_ports)
2331                 return;
2332
2333         ehea_rem_mr(&adapter->mr);
2334 }
2335
2336 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2337 {
2338         if (adapter->active_ports)
2339                 return 0;
2340
2341         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2342 }
2343
2344 static int ehea_up(struct net_device *dev)
2345 {
2346         int ret, i;
2347         struct ehea_port *port = netdev_priv(dev);
2348
2349         if (port->state == EHEA_PORT_UP)
2350                 return 0;
2351
2352         ret = ehea_port_res_setup(port, port->num_def_qps);
2353         if (ret) {
2354                 netdev_err(dev, "port_res_failed\n");
2355                 goto out;
2356         }
2357
2358         /* Set default QP for this port */
2359         ret = ehea_configure_port(port);
2360         if (ret) {
2361                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2362                 goto out_clean_pr;
2363         }
2364
2365         ret = ehea_reg_interrupts(dev);
2366         if (ret) {
2367                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2368                 goto out_clean_pr;
2369         }
2370
2371         for (i = 0; i < port->num_def_qps; i++) {
2372                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2373                 if (ret) {
2374                         netdev_err(dev, "activate_qp failed\n");
2375                         goto out_free_irqs;
2376                 }
2377         }
2378
2379         for (i = 0; i < port->num_def_qps; i++) {
2380                 ret = ehea_fill_port_res(&port->port_res[i]);
2381                 if (ret) {
2382                         netdev_err(dev, "out_free_irqs\n");
2383                         goto out_free_irqs;
2384                 }
2385         }
2386
2387         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2388         if (ret) {
2389                 ret = -EIO;
2390                 goto out_free_irqs;
2391         }
2392
2393         port->state = EHEA_PORT_UP;
2394
2395         ret = 0;
2396         goto out;
2397
2398 out_free_irqs:
2399         ehea_free_interrupts(dev);
2400
2401 out_clean_pr:
2402         ehea_clean_all_portres(port);
2403 out:
2404         if (ret)
2405                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2406
2407         ehea_update_bcmc_registrations();
2408         ehea_update_firmware_handles();
2409
2410         return ret;
2411 }
2412
2413 static void port_napi_disable(struct ehea_port *port)
2414 {
2415         int i;
2416
2417         for (i = 0; i < port->num_def_qps; i++)
2418                 napi_disable(&port->port_res[i].napi);
2419 }
2420
2421 static void port_napi_enable(struct ehea_port *port)
2422 {
2423         int i;
2424
2425         for (i = 0; i < port->num_def_qps; i++)
2426                 napi_enable(&port->port_res[i].napi);
2427 }
2428
2429 static int ehea_open(struct net_device *dev)
2430 {
2431         int ret;
2432         struct ehea_port *port = netdev_priv(dev);
2433
2434         mutex_lock(&port->port_lock);
2435
2436         netif_info(port, ifup, dev, "enabling port\n");
2437
2438         ret = ehea_up(dev);
2439         if (!ret) {
2440                 port_napi_enable(port);
2441                 netif_tx_start_all_queues(dev);
2442         }
2443
2444         mutex_unlock(&port->port_lock);
2445         schedule_delayed_work(&port->stats_work,
2446                               round_jiffies_relative(msecs_to_jiffies(1000)));
2447
2448         return ret;
2449 }
2450
2451 static int ehea_down(struct net_device *dev)
2452 {
2453         int ret;
2454         struct ehea_port *port = netdev_priv(dev);
2455
2456         if (port->state == EHEA_PORT_DOWN)
2457                 return 0;
2458
2459         ehea_drop_multicast_list(dev);
2460         ehea_allmulti(dev, 0);
2461         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2462
2463         ehea_free_interrupts(dev);
2464
2465         port->state = EHEA_PORT_DOWN;
2466
2467         ehea_update_bcmc_registrations();
2468
2469         ret = ehea_clean_all_portres(port);
2470         if (ret)
2471                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2472
2473         ehea_update_firmware_handles();
2474
2475         return ret;
2476 }
2477
2478 static int ehea_stop(struct net_device *dev)
2479 {
2480         int ret;
2481         struct ehea_port *port = netdev_priv(dev);
2482
2483         netif_info(port, ifdown, dev, "disabling port\n");
2484
2485         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2486         cancel_work_sync(&port->reset_task);
2487         cancel_delayed_work_sync(&port->stats_work);
2488         mutex_lock(&port->port_lock);
2489         netif_tx_stop_all_queues(dev);
2490         port_napi_disable(port);
2491         ret = ehea_down(dev);
2492         mutex_unlock(&port->port_lock);
2493         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2494         return ret;
2495 }
2496
2497 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2498 {
2499         struct ehea_qp qp = *orig_qp;
2500         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2501         struct ehea_swqe *swqe;
2502         int wqe_index;
2503         int i;
2504
2505         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2506                 swqe = ehea_get_swqe(&qp, &wqe_index);
2507                 swqe->tx_control |= EHEA_SWQE_PURGE;
2508         }
2509 }
2510
2511 static void ehea_flush_sq(struct ehea_port *port)
2512 {
2513         int i;
2514
2515         for (i = 0; i < port->num_def_qps; i++) {
2516                 struct ehea_port_res *pr = &port->port_res[i];
2517                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2518                 int ret;
2519
2520                 ret = wait_event_timeout(port->swqe_avail_wq,
2521                          atomic_read(&pr->swqe_avail) >= swqe_max,
2522                          msecs_to_jiffies(100));
2523
2524                 if (!ret) {
2525                         pr_err("WARNING: sq not flushed completely\n");
2526                         break;
2527                 }
2528         }
2529 }
2530
2531 static int ehea_stop_qps(struct net_device *dev)
2532 {
2533         struct ehea_port *port = netdev_priv(dev);
2534         struct ehea_adapter *adapter = port->adapter;
2535         struct hcp_modify_qp_cb0 *cb0;
2536         int ret = -EIO;
2537         int dret;
2538         int i;
2539         u64 hret;
2540         u64 dummy64 = 0;
2541         u16 dummy16 = 0;
2542
2543         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2544         if (!cb0) {
2545                 ret = -ENOMEM;
2546                 goto out;
2547         }
2548
2549         for (i = 0; i < (port->num_def_qps); i++) {
2550                 struct ehea_port_res *pr =  &port->port_res[i];
2551                 struct ehea_qp *qp = pr->qp;
2552
2553                 /* Purge send queue */
2554                 ehea_purge_sq(qp);
2555
2556                 /* Disable queue pair */
2557                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2558                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2559                                             cb0);
2560                 if (hret != H_SUCCESS) {
2561                         pr_err("query_ehea_qp failed (1)\n");
2562                         goto out;
2563                 }
2564
2565                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2566                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2567
2568                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2569                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2570                                                             1), cb0, &dummy64,
2571                                              &dummy64, &dummy16, &dummy16);
2572                 if (hret != H_SUCCESS) {
2573                         pr_err("modify_ehea_qp failed (1)\n");
2574                         goto out;
2575                 }
2576
2577                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2578                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2579                                             cb0);
2580                 if (hret != H_SUCCESS) {
2581                         pr_err("query_ehea_qp failed (2)\n");
2582                         goto out;
2583                 }
2584
2585                 /* deregister shared memory regions */
2586                 dret = ehea_rem_smrs(pr);
2587                 if (dret) {
2588                         pr_err("unreg shared memory region failed\n");
2589                         goto out;
2590                 }
2591         }
2592
2593         ret = 0;
2594 out:
2595         free_page((unsigned long)cb0);
2596
2597         return ret;
2598 }
2599
2600 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2601 {
2602         struct ehea_qp qp = *orig_qp;
2603         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2604         struct ehea_rwqe *rwqe;
2605         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2606         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2607         struct sk_buff *skb;
2608         u32 lkey = pr->recv_mr.lkey;
2609
2610
2611         int i;
2612         int index;
2613
2614         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2615                 rwqe = ehea_get_next_rwqe(&qp, 2);
2616                 rwqe->sg_list[0].l_key = lkey;
2617                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2618                 skb = skba_rq2[index];
2619                 if (skb)
2620                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2621         }
2622
2623         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2624                 rwqe = ehea_get_next_rwqe(&qp, 3);
2625                 rwqe->sg_list[0].l_key = lkey;
2626                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2627                 skb = skba_rq3[index];
2628                 if (skb)
2629                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2630         }
2631 }
2632
2633 static int ehea_restart_qps(struct net_device *dev)
2634 {
2635         struct ehea_port *port = netdev_priv(dev);
2636         struct ehea_adapter *adapter = port->adapter;
2637         int ret = 0;
2638         int i;
2639
2640         struct hcp_modify_qp_cb0 *cb0;
2641         u64 hret;
2642         u64 dummy64 = 0;
2643         u16 dummy16 = 0;
2644
2645         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2646         if (!cb0) {
2647                 ret = -ENOMEM;
2648                 goto out;
2649         }
2650
2651         for (i = 0; i < (port->num_def_qps); i++) {
2652                 struct ehea_port_res *pr =  &port->port_res[i];
2653                 struct ehea_qp *qp = pr->qp;
2654
2655                 ret = ehea_gen_smrs(pr);
2656                 if (ret) {
2657                         netdev_err(dev, "creation of shared memory regions failed\n");
2658                         goto out;
2659                 }
2660
2661                 ehea_update_rqs(qp, pr);
2662
2663                 /* Enable queue pair */
2664                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2665                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2666                                             cb0);
2667                 if (hret != H_SUCCESS) {
2668                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2669                         goto out;
2670                 }
2671
2672                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2673                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2674
2675                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2676                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2677                                                             1), cb0, &dummy64,
2678                                              &dummy64, &dummy16, &dummy16);
2679                 if (hret != H_SUCCESS) {
2680                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2681                         goto out;
2682                 }
2683
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                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2689                         goto out;
2690                 }
2691
2692                 /* refill entire queue */
2693                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2694                 ehea_refill_rq2(pr, 0);
2695                 ehea_refill_rq3(pr, 0);
2696         }
2697 out:
2698         free_page((unsigned long)cb0);
2699
2700         return ret;
2701 }
2702
2703 static void ehea_reset_port(struct work_struct *work)
2704 {
2705         int ret;
2706         struct ehea_port *port =
2707                 container_of(work, struct ehea_port, reset_task);
2708         struct net_device *dev = port->netdev;
2709
2710         mutex_lock(&dlpar_mem_lock);
2711         port->resets++;
2712         mutex_lock(&port->port_lock);
2713         netif_tx_disable(dev);
2714
2715         port_napi_disable(port);
2716
2717         ehea_down(dev);
2718
2719         ret = ehea_up(dev);
2720         if (ret)
2721                 goto out;
2722
2723         ehea_set_multicast_list(dev);
2724
2725         netif_info(port, timer, dev, "reset successful\n");
2726
2727         port_napi_enable(port);
2728
2729         netif_tx_wake_all_queues(dev);
2730 out:
2731         mutex_unlock(&port->port_lock);
2732         mutex_unlock(&dlpar_mem_lock);
2733 }
2734
2735 static void ehea_rereg_mrs(void)
2736 {
2737         int ret, i;
2738         struct ehea_adapter *adapter;
2739
2740         pr_info("LPAR memory changed - re-initializing driver\n");
2741
2742         list_for_each_entry(adapter, &adapter_list, list)
2743                 if (adapter->active_ports) {
2744                         /* Shutdown all ports */
2745                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2746                                 struct ehea_port *port = adapter->port[i];
2747                                 struct net_device *dev;
2748
2749                                 if (!port)
2750                                         continue;
2751
2752                                 dev = port->netdev;
2753
2754                                 if (dev->flags & IFF_UP) {
2755                                         mutex_lock(&port->port_lock);
2756                                         netif_tx_disable(dev);
2757                                         ehea_flush_sq(port);
2758                                         ret = ehea_stop_qps(dev);
2759                                         if (ret) {
2760                                                 mutex_unlock(&port->port_lock);
2761                                                 goto out;
2762                                         }
2763                                         port_napi_disable(port);
2764                                         mutex_unlock(&port->port_lock);
2765                                 }
2766                                 reset_sq_restart_flag(port);
2767                         }
2768
2769                         /* Unregister old memory region */
2770                         ret = ehea_rem_mr(&adapter->mr);
2771                         if (ret) {
2772                                 pr_err("unregister MR failed - driver inoperable!\n");
2773                                 goto out;
2774                         }
2775                 }
2776
2777         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2778
2779         list_for_each_entry(adapter, &adapter_list, list)
2780                 if (adapter->active_ports) {
2781                         /* Register new memory region */
2782                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2783                         if (ret) {
2784                                 pr_err("register MR failed - driver inoperable!\n");
2785                                 goto out;
2786                         }
2787
2788                         /* Restart all ports */
2789                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2790                                 struct ehea_port *port = adapter->port[i];
2791
2792                                 if (port) {
2793                                         struct net_device *dev = port->netdev;
2794
2795                                         if (dev->flags & IFF_UP) {
2796                                                 mutex_lock(&port->port_lock);
2797                                                 ret = ehea_restart_qps(dev);
2798                                                 if (!ret) {
2799                                                         check_sqs(port);
2800                                                         port_napi_enable(port);
2801                                                         netif_tx_wake_all_queues(dev);
2802                                                 } else {
2803                                                         netdev_err(dev, "Unable to restart QPS\n");
2804                                                 }
2805                                                 mutex_unlock(&port->port_lock);
2806                                         }
2807                                 }
2808                         }
2809                 }
2810         pr_info("re-initializing driver complete\n");
2811 out:
2812         return;
2813 }
2814
2815 static void ehea_tx_watchdog(struct net_device *dev)
2816 {
2817         struct ehea_port *port = netdev_priv(dev);
2818
2819         if (netif_carrier_ok(dev) &&
2820             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2821                 ehea_schedule_port_reset(port);
2822 }
2823
2824 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2825 {
2826         struct hcp_query_ehea *cb;
2827         u64 hret;
2828         int ret;
2829
2830         cb = (void *)get_zeroed_page(GFP_KERNEL);
2831         if (!cb) {
2832                 ret = -ENOMEM;
2833                 goto out;
2834         }
2835
2836         hret = ehea_h_query_ehea(adapter->handle, cb);
2837
2838         if (hret != H_SUCCESS) {
2839                 ret = -EIO;
2840                 goto out_herr;
2841         }
2842
2843         adapter->max_mc_mac = cb->max_mc_mac - 1;
2844         ret = 0;
2845
2846 out_herr:
2847         free_page((unsigned long)cb);
2848 out:
2849         return ret;
2850 }
2851
2852 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2853 {
2854         struct hcp_ehea_port_cb4 *cb4;
2855         u64 hret;
2856         int ret = 0;
2857
2858         *jumbo = 0;
2859
2860         /* (Try to) enable *jumbo frames */
2861         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2862         if (!cb4) {
2863                 pr_err("no mem for cb4\n");
2864                 ret = -ENOMEM;
2865                 goto out;
2866         } else {
2867                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2868                                               port->logical_port_id,
2869                                               H_PORT_CB4,
2870                                               H_PORT_CB4_JUMBO, cb4);
2871                 if (hret == H_SUCCESS) {
2872                         if (cb4->jumbo_frame)
2873                                 *jumbo = 1;
2874                         else {
2875                                 cb4->jumbo_frame = 1;
2876                                 hret = ehea_h_modify_ehea_port(port->adapter->
2877                                                                handle,
2878                                                                port->
2879                                                                logical_port_id,
2880                                                                H_PORT_CB4,
2881                                                                H_PORT_CB4_JUMBO,
2882                                                                cb4);
2883                                 if (hret == H_SUCCESS)
2884                                         *jumbo = 1;
2885                         }
2886                 } else
2887                         ret = -EINVAL;
2888
2889                 free_page((unsigned long)cb4);
2890         }
2891 out:
2892         return ret;
2893 }
2894
2895 static ssize_t ehea_show_port_id(struct device *dev,
2896                                  struct device_attribute *attr, char *buf)
2897 {
2898         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2899         return sprintf(buf, "%d", port->logical_port_id);
2900 }
2901
2902 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2903                    NULL);
2904
2905 static void logical_port_release(struct device *dev)
2906 {
2907         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2908         of_node_put(port->ofdev.dev.of_node);
2909 }
2910
2911 static struct device *ehea_register_port(struct ehea_port *port,
2912                                          struct device_node *dn)
2913 {
2914         int ret;
2915
2916         port->ofdev.dev.of_node = of_node_get(dn);
2917         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2918         port->ofdev.dev.bus = &ibmebus_bus_type;
2919
2920         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2921         port->ofdev.dev.release = logical_port_release;
2922
2923         ret = of_device_register(&port->ofdev);
2924         if (ret) {
2925                 pr_err("failed to register device. ret=%d\n", ret);
2926                 goto out;
2927         }
2928
2929         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2930         if (ret) {
2931                 pr_err("failed to register attributes, ret=%d\n", ret);
2932                 goto out_unreg_of_dev;
2933         }
2934
2935         return &port->ofdev.dev;
2936
2937 out_unreg_of_dev:
2938         of_device_unregister(&port->ofdev);
2939 out:
2940         return NULL;
2941 }
2942
2943 static void ehea_unregister_port(struct ehea_port *port)
2944 {
2945         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2946         of_device_unregister(&port->ofdev);
2947 }
2948
2949 static const struct net_device_ops ehea_netdev_ops = {
2950         .ndo_open               = ehea_open,
2951         .ndo_stop               = ehea_stop,
2952         .ndo_start_xmit         = ehea_start_xmit,
2953 #ifdef CONFIG_NET_POLL_CONTROLLER
2954         .ndo_poll_controller    = ehea_netpoll,
2955 #endif
2956         .ndo_get_stats64        = ehea_get_stats64,
2957         .ndo_set_mac_address    = ehea_set_mac_addr,
2958         .ndo_validate_addr      = eth_validate_addr,
2959         .ndo_set_rx_mode        = ehea_set_multicast_list,
2960         .ndo_change_mtu         = ehea_change_mtu,
2961         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2962         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2963         .ndo_tx_timeout         = ehea_tx_watchdog,
2964 };
2965
2966 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2967                                          u32 logical_port_id,
2968                                          struct device_node *dn)
2969 {
2970         int ret;
2971         struct net_device *dev;
2972         struct ehea_port *port;
2973         struct device *port_dev;
2974         int jumbo;
2975
2976         /* allocate memory for the port structures */
2977         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2978
2979         if (!dev) {
2980                 ret = -ENOMEM;
2981                 goto out_err;
2982         }
2983
2984         port = netdev_priv(dev);
2985
2986         mutex_init(&port->port_lock);
2987         port->state = EHEA_PORT_DOWN;
2988         port->sig_comp_iv = sq_entries / 10;
2989
2990         port->adapter = adapter;
2991         port->netdev = dev;
2992         port->logical_port_id = logical_port_id;
2993
2994         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2995
2996         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2997         if (!port->mc_list) {
2998                 ret = -ENOMEM;
2999                 goto out_free_ethdev;
3000         }
3001
3002         INIT_LIST_HEAD(&port->mc_list->list);
3003
3004         ret = ehea_sense_port_attr(port);
3005         if (ret)
3006                 goto out_free_mc_list;
3007
3008         netif_set_real_num_rx_queues(dev, port->num_def_qps);
3009         netif_set_real_num_tx_queues(dev, port->num_def_qps);
3010
3011         port_dev = ehea_register_port(port, dn);
3012         if (!port_dev)
3013                 goto out_free_mc_list;
3014
3015         SET_NETDEV_DEV(dev, port_dev);
3016
3017         /* initialize net_device structure */
3018         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3019
3020         dev->netdev_ops = &ehea_netdev_ops;
3021         ehea_set_ethtool_ops(dev);
3022
3023         dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
3024                       NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3025         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO |
3026                       NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3027                       NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3028                       NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3029         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3030                         NETIF_F_IP_CSUM;
3031         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3032
3033         INIT_WORK(&port->reset_task, ehea_reset_port);
3034         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3035
3036         init_waitqueue_head(&port->swqe_avail_wq);
3037         init_waitqueue_head(&port->restart_wq);
3038
3039         memset(&port->stats, 0, sizeof(struct net_device_stats));
3040         ret = register_netdev(dev);
3041         if (ret) {
3042                 pr_err("register_netdev failed. ret=%d\n", ret);
3043                 goto out_unreg_port;
3044         }
3045
3046         ret = ehea_get_jumboframe_status(port, &jumbo);
3047         if (ret)
3048                 netdev_err(dev, "failed determining jumbo frame status\n");
3049
3050         netdev_info(dev, "Jumbo frames are %sabled\n",
3051                     jumbo == 1 ? "en" : "dis");
3052
3053         adapter->active_ports++;
3054
3055         return port;
3056
3057 out_unreg_port:
3058         ehea_unregister_port(port);
3059
3060 out_free_mc_list:
3061         kfree(port->mc_list);
3062
3063 out_free_ethdev:
3064         free_netdev(dev);
3065
3066 out_err:
3067         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3068                logical_port_id, ret);
3069         return NULL;
3070 }
3071
3072 static void ehea_shutdown_single_port(struct ehea_port *port)
3073 {
3074         struct ehea_adapter *adapter = port->adapter;
3075
3076         cancel_work_sync(&port->reset_task);
3077         cancel_delayed_work_sync(&port->stats_work);
3078         unregister_netdev(port->netdev);
3079         ehea_unregister_port(port);
3080         kfree(port->mc_list);
3081         free_netdev(port->netdev);
3082         adapter->active_ports--;
3083 }
3084
3085 static int ehea_setup_ports(struct ehea_adapter *adapter)
3086 {
3087         struct device_node *lhea_dn;
3088         struct device_node *eth_dn = NULL;
3089
3090         const u32 *dn_log_port_id;
3091         int i = 0;
3092
3093         lhea_dn = adapter->ofdev->dev.of_node;
3094         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3095
3096                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3097                                                  NULL);
3098                 if (!dn_log_port_id) {
3099                         pr_err("bad device node: eth_dn name=%s\n",
3100                                eth_dn->full_name);
3101                         continue;
3102                 }
3103
3104                 if (ehea_add_adapter_mr(adapter)) {
3105                         pr_err("creating MR failed\n");
3106                         of_node_put(eth_dn);
3107                         return -EIO;
3108                 }
3109
3110                 adapter->port[i] = ehea_setup_single_port(adapter,
3111                                                           *dn_log_port_id,
3112                                                           eth_dn);
3113                 if (adapter->port[i])
3114                         netdev_info(adapter->port[i]->netdev,
3115                                     "logical port id #%d\n", *dn_log_port_id);
3116                 else
3117                         ehea_remove_adapter_mr(adapter);
3118
3119                 i++;
3120         }
3121         return 0;
3122 }
3123
3124 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3125                                            u32 logical_port_id)
3126 {
3127         struct device_node *lhea_dn;
3128         struct device_node *eth_dn = NULL;
3129         const u32 *dn_log_port_id;
3130
3131         lhea_dn = adapter->ofdev->dev.of_node;
3132         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3133
3134                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3135                                                  NULL);
3136                 if (dn_log_port_id)
3137                         if (*dn_log_port_id == logical_port_id)
3138                                 return eth_dn;
3139         }
3140
3141         return NULL;
3142 }
3143
3144 static ssize_t ehea_probe_port(struct device *dev,
3145                                struct device_attribute *attr,
3146                                const char *buf, size_t count)
3147 {
3148         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3149         struct ehea_port *port;
3150         struct device_node *eth_dn = NULL;
3151         int i;
3152
3153         u32 logical_port_id;
3154
3155         sscanf(buf, "%d", &logical_port_id);
3156
3157         port = ehea_get_port(adapter, logical_port_id);
3158
3159         if (port) {
3160                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3161                             logical_port_id);
3162                 return -EINVAL;
3163         }
3164
3165         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3166
3167         if (!eth_dn) {
3168                 pr_info("no logical port with id %d found\n", logical_port_id);
3169                 return -EINVAL;
3170         }
3171
3172         if (ehea_add_adapter_mr(adapter)) {
3173                 pr_err("creating MR failed\n");
3174                 return -EIO;
3175         }
3176
3177         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3178
3179         of_node_put(eth_dn);
3180
3181         if (port) {
3182                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3183                         if (!adapter->port[i]) {
3184                                 adapter->port[i] = port;
3185                                 break;
3186                         }
3187
3188                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3189                             logical_port_id);
3190         } else {
3191                 ehea_remove_adapter_mr(adapter);
3192                 return -EIO;
3193         }
3194
3195         return (ssize_t) count;
3196 }
3197
3198 static ssize_t ehea_remove_port(struct device *dev,
3199                                 struct device_attribute *attr,
3200                                 const char *buf, size_t count)
3201 {
3202         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3203         struct ehea_port *port;
3204         int i;
3205         u32 logical_port_id;
3206
3207         sscanf(buf, "%d", &logical_port_id);
3208
3209         port = ehea_get_port(adapter, logical_port_id);
3210
3211         if (port) {
3212                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3213                             logical_port_id);
3214
3215                 ehea_shutdown_single_port(port);
3216
3217                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3218                         if (adapter->port[i] == port) {
3219                                 adapter->port[i] = NULL;
3220                                 break;
3221                         }
3222         } else {
3223                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3224                        logical_port_id);
3225                 return -EINVAL;
3226         }
3227
3228         ehea_remove_adapter_mr(adapter);
3229
3230         return (ssize_t) count;
3231 }
3232
3233 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3234 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3235
3236 static int ehea_create_device_sysfs(struct platform_device *dev)
3237 {
3238         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3239         if (ret)
3240                 goto out;
3241
3242         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3243 out:
3244         return ret;
3245 }
3246
3247 static void ehea_remove_device_sysfs(struct platform_device *dev)
3248 {
3249         device_remove_file(&dev->dev, &dev_attr_probe_port);
3250         device_remove_file(&dev->dev, &dev_attr_remove_port);
3251 }
3252
3253 static int ehea_probe_adapter(struct platform_device *dev)
3254 {
3255         struct ehea_adapter *adapter;
3256         const u64 *adapter_handle;
3257         int ret;
3258         int i;
3259
3260         if (!dev || !dev->dev.of_node) {
3261                 pr_err("Invalid ibmebus device probed\n");
3262                 return -EINVAL;
3263         }
3264
3265         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3266         if (!adapter) {
3267                 ret = -ENOMEM;
3268                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3269                 goto out;
3270         }
3271
3272         list_add(&adapter->list, &adapter_list);
3273
3274         adapter->ofdev = dev;
3275
3276         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3277                                          NULL);
3278         if (adapter_handle)
3279                 adapter->handle = *adapter_handle;
3280
3281         if (!adapter->handle) {
3282                 dev_err(&dev->dev, "failed getting handle for adapter"
3283                         " '%s'\n", dev->dev.of_node->full_name);
3284                 ret = -ENODEV;
3285                 goto out_free_ad;
3286         }
3287
3288         adapter->pd = EHEA_PD_ID;
3289
3290         platform_set_drvdata(dev, adapter);
3291
3292
3293         /* initialize adapter and ports */
3294         /* get adapter properties */
3295         ret = ehea_sense_adapter_attr(adapter);
3296         if (ret) {
3297                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3298                 goto out_free_ad;
3299         }
3300
3301         adapter->neq = ehea_create_eq(adapter,
3302                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3303         if (!adapter->neq) {
3304                 ret = -EIO;
3305                 dev_err(&dev->dev, "NEQ creation failed\n");
3306                 goto out_free_ad;
3307         }
3308
3309         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3310                      (unsigned long)adapter);
3311
3312         ret = ehea_create_device_sysfs(dev);
3313         if (ret)
3314                 goto out_kill_eq;
3315
3316         ret = ehea_setup_ports(adapter);
3317         if (ret) {
3318                 dev_err(&dev->dev, "setup_ports failed\n");
3319                 goto out_rem_dev_sysfs;
3320         }
3321
3322         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3323                                   ehea_interrupt_neq, IRQF_DISABLED,
3324                                   "ehea_neq", adapter);
3325         if (ret) {
3326                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3327                 goto out_shutdown_ports;
3328         }
3329
3330         /* Handle any events that might be pending. */
3331         tasklet_hi_schedule(&adapter->neq_tasklet);
3332
3333         ret = 0;
3334         goto out;
3335
3336 out_shutdown_ports:
3337         for (i = 0; i < EHEA_MAX_PORTS; i++)
3338                 if (adapter->port[i]) {
3339                         ehea_shutdown_single_port(adapter->port[i]);
3340                         adapter->port[i] = NULL;
3341                 }
3342
3343 out_rem_dev_sysfs:
3344         ehea_remove_device_sysfs(dev);
3345
3346 out_kill_eq:
3347         ehea_destroy_eq(adapter->neq);
3348
3349 out_free_ad:
3350         list_del(&adapter->list);
3351         kfree(adapter);
3352
3353 out:
3354         ehea_update_firmware_handles();
3355
3356         return ret;
3357 }
3358
3359 static int ehea_remove(struct platform_device *dev)
3360 {
3361         struct ehea_adapter *adapter = platform_get_drvdata(dev);
3362         int i;
3363
3364         for (i = 0; i < EHEA_MAX_PORTS; i++)
3365                 if (adapter->port[i]) {
3366                         ehea_shutdown_single_port(adapter->port[i]);
3367                         adapter->port[i] = NULL;
3368                 }
3369
3370         ehea_remove_device_sysfs(dev);
3371
3372         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3373         tasklet_kill(&adapter->neq_tasklet);
3374
3375         ehea_destroy_eq(adapter->neq);
3376         ehea_remove_adapter_mr(adapter);
3377         list_del(&adapter->list);
3378         kfree(adapter);
3379
3380         ehea_update_firmware_handles();
3381
3382         return 0;
3383 }
3384
3385 static void ehea_crash_handler(void)
3386 {
3387         int i;
3388
3389         if (ehea_fw_handles.arr)
3390                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3391                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3392                                              ehea_fw_handles.arr[i].fwh,
3393                                              FORCE_FREE);
3394
3395         if (ehea_bcmc_regs.arr)
3396                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3397                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3398                                               ehea_bcmc_regs.arr[i].port_id,
3399                                               ehea_bcmc_regs.arr[i].reg_type,
3400                                               ehea_bcmc_regs.arr[i].macaddr,
3401                                               0, H_DEREG_BCMC);
3402 }
3403
3404 static int ehea_mem_notifier(struct notifier_block *nb,
3405                              unsigned long action, void *data)
3406 {
3407         int ret = NOTIFY_BAD;
3408         struct memory_notify *arg = data;
3409
3410         mutex_lock(&dlpar_mem_lock);
3411
3412         switch (action) {
3413         case MEM_CANCEL_OFFLINE:
3414                 pr_info("memory offlining canceled");
3415                 /* Readd canceled memory block */
3416         case MEM_ONLINE:
3417                 pr_info("memory is going online");
3418                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3419                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3420                         goto out_unlock;
3421                 ehea_rereg_mrs();
3422                 break;
3423         case MEM_GOING_OFFLINE:
3424                 pr_info("memory is going offline");
3425                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3426                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3427                         goto out_unlock;
3428                 ehea_rereg_mrs();
3429                 break;
3430         default:
3431                 break;
3432         }
3433
3434         ehea_update_firmware_handles();
3435         ret = NOTIFY_OK;
3436
3437 out_unlock:
3438         mutex_unlock(&dlpar_mem_lock);
3439         return ret;
3440 }
3441
3442 static struct notifier_block ehea_mem_nb = {
3443         .notifier_call = ehea_mem_notifier,
3444 };
3445
3446 static int ehea_reboot_notifier(struct notifier_block *nb,
3447                                 unsigned long action, void *unused)
3448 {
3449         if (action == SYS_RESTART) {
3450                 pr_info("Reboot: freeing all eHEA resources\n");
3451                 ibmebus_unregister_driver(&ehea_driver);
3452         }
3453         return NOTIFY_DONE;
3454 }
3455
3456 static struct notifier_block ehea_reboot_nb = {
3457         .notifier_call = ehea_reboot_notifier,
3458 };
3459
3460 static int check_module_parm(void)
3461 {
3462         int ret = 0;
3463
3464         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3465             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3466                 pr_info("Bad parameter: rq1_entries\n");
3467                 ret = -EINVAL;
3468         }
3469         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3470             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3471                 pr_info("Bad parameter: rq2_entries\n");
3472                 ret = -EINVAL;
3473         }
3474         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3475             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3476                 pr_info("Bad parameter: rq3_entries\n");
3477                 ret = -EINVAL;
3478         }
3479         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3480             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3481                 pr_info("Bad parameter: sq_entries\n");
3482                 ret = -EINVAL;
3483         }
3484
3485         return ret;
3486 }
3487
3488 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3489                                       char *buf)
3490 {
3491         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3492 }
3493
3494 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3495                    ehea_show_capabilities, NULL);
3496
3497 static int __init ehea_module_init(void)
3498 {
3499         int ret;
3500
3501         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3502
3503         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3504         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3505
3506         mutex_init(&ehea_fw_handles.lock);
3507         spin_lock_init(&ehea_bcmc_regs.lock);
3508
3509         ret = check_module_parm();
3510         if (ret)
3511                 goto out;
3512
3513         ret = ehea_create_busmap();
3514         if (ret)
3515                 goto out;
3516
3517         ret = register_reboot_notifier(&ehea_reboot_nb);
3518         if (ret)
3519                 pr_info("failed registering reboot notifier\n");
3520
3521         ret = register_memory_notifier(&ehea_mem_nb);
3522         if (ret)
3523                 pr_info("failed registering memory remove notifier\n");
3524
3525         ret = crash_shutdown_register(ehea_crash_handler);
3526         if (ret)
3527                 pr_info("failed registering crash handler\n");
3528
3529         ret = ibmebus_register_driver(&ehea_driver);
3530         if (ret) {
3531                 pr_err("failed registering eHEA device driver on ebus\n");
3532                 goto out2;
3533         }
3534
3535         ret = driver_create_file(&ehea_driver.driver,
3536                                  &driver_attr_capabilities);
3537         if (ret) {
3538                 pr_err("failed to register capabilities attribute, ret=%d\n",
3539                        ret);
3540                 goto out3;
3541         }
3542
3543         return ret;
3544
3545 out3:
3546         ibmebus_unregister_driver(&ehea_driver);
3547 out2:
3548         unregister_memory_notifier(&ehea_mem_nb);
3549         unregister_reboot_notifier(&ehea_reboot_nb);
3550         crash_shutdown_unregister(ehea_crash_handler);
3551 out:
3552         return ret;
3553 }
3554
3555 static void __exit ehea_module_exit(void)
3556 {
3557         int ret;
3558
3559         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3560         ibmebus_unregister_driver(&ehea_driver);
3561         unregister_reboot_notifier(&ehea_reboot_nb);
3562         ret = crash_shutdown_unregister(ehea_crash_handler);
3563         if (ret)
3564                 pr_info("failed unregistering crash handler\n");
3565         unregister_memory_notifier(&ehea_mem_nb);
3566         kfree(ehea_fw_handles.arr);
3567         kfree(ehea_bcmc_regs.arr);
3568         ehea_destroy_busmap();
3569 }
3570
3571 module_init(ehea_module_init);
3572 module_exit(ehea_module_exit);