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                               const struct of_device_id *id);
 103
 104 static int ehea_remove(struct platform_device *dev);
 105
 106 static struct of_device_id ehea_device_table[] = {
 107         {
 108                 .name = "lhea",
 109                 .compatible = "IBM,lhea",
 110         },
 111         {},
 112 };
 113 MODULE_DEVICE_TABLE(of, ehea_device_table);
 114
 115 static struct of_platform_driver ehea_driver = {
 116         .driver = {
 117                 .name = "ehea",
 118                 .owner = THIS_MODULE,
 119                 .of_match_table = ehea_device_table,
 120         },
 121         .probe = ehea_probe_adapter,
 122         .remove = ehea_remove,
 123 };
 124
 125 void ehea_dump(void *adr, int len, char *msg)
 126 {
 127         int x;
 128         unsigned char *deb = adr;
 129         for (x = 0; x < len; x += 16) {
 130                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 131                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 132                 deb += 16;
 133         }
 134 }
 135
 136 static void ehea_schedule_port_reset(struct ehea_port *port)
 137 {
 138         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 139                 schedule_work(&port->reset_task);
 140 }
 141
 142 static void ehea_update_firmware_handles(void)
 143 {
 144         struct ehea_fw_handle_entry *arr = NULL;
 145         struct ehea_adapter *adapter;
 146         int num_adapters = 0;
 147         int num_ports = 0;
 148         int num_portres = 0;
 149         int i = 0;
 150         int num_fw_handles, k, l;
 151
 152         /* Determine number of handles */
 153         mutex_lock(&ehea_fw_handles.lock);
 154
 155         list_for_each_entry(adapter, &adapter_list, list) {
 156                 num_adapters++;
 157
 158                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 159                         struct ehea_port *port = adapter->port[k];
 160
 161                         if (!port || (port->state != EHEA_PORT_UP))
 162                                 continue;
 163
 164                         num_ports++;
 165                         num_portres += port->num_def_qps;
 166                 }
 167         }
 168
 169         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 170                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 171                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 172
 173         if (num_fw_handles) {
 174                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 175                 if (!arr)
 176                         goto out;  /* Keep the existing array */
 177         } else
 178                 goto out_update;
 179
 180         list_for_each_entry(adapter, &adapter_list, list) {
 181                 if (num_adapters == 0)
 182                         break;
 183
 184                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 185                         struct ehea_port *port = adapter->port[k];
 186
 187                         if (!port || (port->state != EHEA_PORT_UP) ||
 188                             (num_ports == 0))
 189                                 continue;
 190
 191                         for (l = 0; l < port->num_def_qps; l++) {
 192                                 struct ehea_port_res *pr = &port->port_res[l];
 193
 194                                 arr[i].adh = adapter->handle;
 195                                 arr[i++].fwh = pr->qp->fw_handle;
 196                                 arr[i].adh = adapter->handle;
 197                                 arr[i++].fwh = pr->send_cq->fw_handle;
 198                                 arr[i].adh = adapter->handle;
 199                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 200                                 arr[i].adh = adapter->handle;
 201                                 arr[i++].fwh = pr->eq->fw_handle;
 202                                 arr[i].adh = adapter->handle;
 203                                 arr[i++].fwh = pr->send_mr.handle;
 204                                 arr[i].adh = adapter->handle;
 205                                 arr[i++].fwh = pr->recv_mr.handle;
 206                         }
 207                         arr[i].adh = adapter->handle;
 208                         arr[i++].fwh = port->qp_eq->fw_handle;
 209                         num_ports--;
 210                 }
 211
 212                 arr[i].adh = adapter->handle;
 213                 arr[i++].fwh = adapter->neq->fw_handle;
 214
 215                 if (adapter->mr.handle) {
 216                         arr[i].adh = adapter->handle;
 217                         arr[i++].fwh = adapter->mr.handle;
 218                 }
 219                 num_adapters--;
 220         }
 221
 222 out_update:
 223         kfree(ehea_fw_handles.arr);
 224         ehea_fw_handles.arr = arr;
 225         ehea_fw_handles.num_entries = i;
 226 out:
 227         mutex_unlock(&ehea_fw_handles.lock);
 228 }
 229
 230 static void ehea_update_bcmc_registrations(void)
 231 {
 232         unsigned long flags;
 233         struct ehea_bcmc_reg_entry *arr = NULL;
 234         struct ehea_adapter *adapter;
 235         struct ehea_mc_list *mc_entry;
 236         int num_registrations = 0;
 237         int i = 0;
 238         int k;
 239
 240         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 241
 242         /* Determine number of registrations */
 243         list_for_each_entry(adapter, &adapter_list, list)
 244                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 245                         struct ehea_port *port = adapter->port[k];
 246
 247                         if (!port || (port->state != EHEA_PORT_UP))
 248                                 continue;
 249
 250                         num_registrations += 2; /* Broadcast registrations */
 251
 252                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 253                                 num_registrations += 2;
 254                 }
 255
 256         if (num_registrations) {
 257                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 258                 if (!arr)
 259                         goto out;  /* Keep the existing array */
 260         } else
 261                 goto out_update;
 262
 263         list_for_each_entry(adapter, &adapter_list, list) {
 264                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 265                         struct ehea_port *port = adapter->port[k];
 266
 267                         if (!port || (port->state != EHEA_PORT_UP))
 268                                 continue;
 269
 270                         if (num_registrations == 0)
 271                                 goto out_update;
 272
 273                         arr[i].adh = adapter->handle;
 274                         arr[i].port_id = port->logical_port_id;
 275                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 276                                           EHEA_BCMC_UNTAGGED;
 277                         arr[i++].macaddr = port->mac_addr;
 278
 279                         arr[i].adh = adapter->handle;
 280                         arr[i].port_id = port->logical_port_id;
 281                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 282                                           EHEA_BCMC_VLANID_ALL;
 283                         arr[i++].macaddr = port->mac_addr;
 284                         num_registrations -= 2;
 285
 286                         list_for_each_entry(mc_entry,
 287                                             &port->mc_list->list, list) {
 288                                 if (num_registrations == 0)
 289                                         goto out_update;
 290
 291                                 arr[i].adh = adapter->handle;
 292                                 arr[i].port_id = port->logical_port_id;
 293                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 294                                                   EHEA_BCMC_UNTAGGED;
 295                                 if (mc_entry->macaddr == 0)
 296                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 297                                 arr[i++].macaddr = mc_entry->macaddr;
 298
 299                                 arr[i].adh = adapter->handle;
 300                                 arr[i].port_id = port->logical_port_id;
 301                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 302                                                   EHEA_BCMC_VLANID_ALL;
 303                                 if (mc_entry->macaddr == 0)
 304                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 305                                 arr[i++].macaddr = mc_entry->macaddr;
 306                                 num_registrations -= 2;
 307                         }
 308                 }
 309         }
 310
 311 out_update:
 312         kfree(ehea_bcmc_regs.arr);
 313         ehea_bcmc_regs.arr = arr;
 314         ehea_bcmc_regs.num_entries = i;
 315 out:
 316         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 317 }
 318
 319 static struct rtnl_link_stats64 *ehea_get_stats64(struct net_device *dev,
 320                                         struct rtnl_link_stats64 *stats)
 321 {
 322         struct ehea_port *port = netdev_priv(dev);
 323         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 324         int i;
 325
 326         for (i = 0; i < port->num_def_qps; i++) {
 327                 rx_packets += port->port_res[i].rx_packets;
 328                 rx_bytes   += port->port_res[i].rx_bytes;
 329         }
 330
 331         for (i = 0; i < port->num_def_qps; i++) {
 332                 tx_packets += port->port_res[i].tx_packets;
 333                 tx_bytes   += port->port_res[i].tx_bytes;
 334         }
 335
 336         stats->tx_packets = tx_packets;
 337         stats->rx_bytes = rx_bytes;
 338         stats->tx_bytes = tx_bytes;
 339         stats->rx_packets = rx_packets;
 340
 341         stats->multicast = port->stats.multicast;
 342         stats->rx_errors = port->stats.rx_errors;
 343         return stats;
 344 }
 345
 346 static void ehea_update_stats(struct work_struct *work)
 347 {
 348         struct ehea_port *port =
 349                 container_of(work, struct ehea_port, stats_work.work);
 350         struct net_device *dev = port->netdev;
 351         struct rtnl_link_stats64 *stats = &port->stats;
 352         struct hcp_ehea_port_cb2 *cb2;
 353         u64 hret;
 354
 355         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 356         if (!cb2) {
 357                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 358                 goto resched;
 359         }
 360
 361         hret = ehea_h_query_ehea_port(port->adapter->handle,
 362                                       port->logical_port_id,
 363                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 364         if (hret != H_SUCCESS) {
 365                 netdev_err(dev, "query_ehea_port failed\n");
 366                 goto out_herr;
 367         }
 368
 369         if (netif_msg_hw(port))
 370                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 371
 372         stats->multicast = cb2->rxmcp;
 373         stats->rx_errors = cb2->rxuerr;
 374
 375 out_herr:
 376         free_page((unsigned long)cb2);
 377 resched:
 378         schedule_delayed_work(&port->stats_work,
 379                               round_jiffies_relative(msecs_to_jiffies(1000)));
 380 }
 381
 382 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 383 {
 384         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 385         struct net_device *dev = pr->port->netdev;
 386         int max_index_mask = pr->rq1_skba.len - 1;
 387         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 388         int adder = 0;
 389         int i;
 390
 391         pr->rq1_skba.os_skbs = 0;
 392
 393         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 394                 if (nr_of_wqes > 0)
 395                         pr->rq1_skba.index = index;
 396                 pr->rq1_skba.os_skbs = fill_wqes;
 397                 return;
 398         }
 399
 400         for (i = 0; i < fill_wqes; i++) {
 401                 if (!skb_arr_rq1[index]) {
 402                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 403                                                               EHEA_L_PKT_SIZE);
 404                         if (!skb_arr_rq1[index]) {
 405                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 406                                 break;
 407                         }
 408                 }
 409                 index--;
 410                 index &= max_index_mask;
 411                 adder++;
 412         }
 413
 414         if (adder == 0)
 415                 return;
 416
 417         /* Ring doorbell */
 418         ehea_update_rq1a(pr->qp, adder);
 419 }
 420
 421 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 422 {
 423         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 424         struct net_device *dev = pr->port->netdev;
 425         int i;
 426
 427         if (nr_rq1a > pr->rq1_skba.len) {
 428                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 429                 return;
 430         }
 431
 432         for (i = 0; i < nr_rq1a; i++) {
 433                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 434                 if (!skb_arr_rq1[i])
 435                         break;
 436         }
 437         /* Ring doorbell */
 438         ehea_update_rq1a(pr->qp, i - 1);
 439 }
 440
 441 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 442                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 443                               int num_wqes, int wqe_type, int packet_size)
 444 {
 445         struct net_device *dev = pr->port->netdev;
 446         struct ehea_qp *qp = pr->qp;
 447         struct sk_buff **skb_arr = q_skba->arr;
 448         struct ehea_rwqe *rwqe;
 449         int i, index, max_index_mask, fill_wqes;
 450         int adder = 0;
 451         int ret = 0;
 452
 453         fill_wqes = q_skba->os_skbs + num_wqes;
 454         q_skba->os_skbs = 0;
 455
 456         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 457                 q_skba->os_skbs = fill_wqes;
 458                 return ret;
 459         }
 460
 461         index = q_skba->index;
 462         max_index_mask = q_skba->len - 1;
 463         for (i = 0; i < fill_wqes; i++) {
 464                 u64 tmp_addr;
 465                 struct sk_buff *skb;
 466
 467                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 468                 if (!skb) {
 469                         q_skba->os_skbs = fill_wqes - i;
 470                         if (q_skba->os_skbs == q_skba->len - 2) {
 471                                 netdev_info(pr->port->netdev,
 472                                             "rq%i ran dry - no mem for skb\n",
 473                                             rq_nr);
 474                                 ret = -ENOMEM;
 475                         }
 476                         break;
 477                 }
 478
 479                 skb_arr[index] = skb;
 480                 tmp_addr = ehea_map_vaddr(skb->data);
 481                 if (tmp_addr == -1) {
 482                         dev_kfree_skb(skb);
 483                         q_skba->os_skbs = fill_wqes - i;
 484                         ret = 0;
 485                         break;
 486                 }
 487
 488                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 489                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 490                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 491                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 492                 rwqe->sg_list[0].vaddr = tmp_addr;
 493                 rwqe->sg_list[0].len = packet_size;
 494                 rwqe->data_segments = 1;
 495
 496                 index++;
 497                 index &= max_index_mask;
 498                 adder++;
 499         }
 500
 501         q_skba->index = index;
 502         if (adder == 0)
 503                 goto out;
 504
 505         /* Ring doorbell */
 506         iosync();
 507         if (rq_nr == 2)
 508                 ehea_update_rq2a(pr->qp, adder);
 509         else
 510                 ehea_update_rq3a(pr->qp, adder);
 511 out:
 512         return ret;
 513 }
 514
 515
 516 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 517 {
 518         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 519                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 520                                   EHEA_RQ2_PKT_SIZE);
 521 }
 522
 523
 524 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 525 {
 526         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 527                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 528                                   EHEA_MAX_PACKET_SIZE);
 529 }
 530
 531 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 532 {
 533         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 534         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 535                 return 0;
 536         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 537             (cqe->header_length == 0))
 538                 return 0;
 539         return -EINVAL;
 540 }
 541
 542 static inline void ehea_fill_skb(struct net_device *dev,
 543                                  struct sk_buff *skb, struct ehea_cqe *cqe,
 544                                  struct ehea_port_res *pr)
 545 {
 546         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 547
 548         skb_put(skb, length);
 549         skb->protocol = eth_type_trans(skb, dev);
 550
 551         /* The packet was not an IPV4 packet so a complemented checksum was
 552            calculated. The value is found in the Internet Checksum field. */
 553         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 554                 skb->ip_summed = CHECKSUM_COMPLETE;
 555                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 556         } else
 557                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 558
 559         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 560 }
 561
 562 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 563                                                int arr_len,
 564                                                struct ehea_cqe *cqe)
 565 {
 566         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 567         struct sk_buff *skb;
 568         void *pref;
 569         int x;
 570
 571         x = skb_index + 1;
 572         x &= (arr_len - 1);
 573
 574         pref = skb_array[x];
 575         if (pref) {
 576                 prefetchw(pref);
 577                 prefetchw(pref + EHEA_CACHE_LINE);
 578
 579                 pref = (skb_array[x]->data);
 580                 prefetch(pref);
 581                 prefetch(pref + EHEA_CACHE_LINE);
 582                 prefetch(pref + EHEA_CACHE_LINE * 2);
 583                 prefetch(pref + EHEA_CACHE_LINE * 3);
 584         }
 585
 586         skb = skb_array[skb_index];
 587         skb_array[skb_index] = NULL;
 588         return skb;
 589 }
 590
 591 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 592                                                   int arr_len, int wqe_index)
 593 {
 594         struct sk_buff *skb;
 595         void *pref;
 596         int x;
 597
 598         x = wqe_index + 1;
 599         x &= (arr_len - 1);
 600
 601         pref = skb_array[x];
 602         if (pref) {
 603                 prefetchw(pref);
 604                 prefetchw(pref + EHEA_CACHE_LINE);
 605
 606                 pref = (skb_array[x]->data);
 607                 prefetchw(pref);
 608                 prefetchw(pref + EHEA_CACHE_LINE);
 609         }
 610
 611         skb = skb_array[wqe_index];
 612         skb_array[wqe_index] = NULL;
 613         return skb;
 614 }
 615
 616 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 617                                  struct ehea_cqe *cqe, int *processed_rq2,
 618                                  int *processed_rq3)
 619 {
 620         struct sk_buff *skb;
 621
 622         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 623                 pr->p_stats.err_tcp_cksum++;
 624         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 625                 pr->p_stats.err_ip_cksum++;
 626         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 627                 pr->p_stats.err_frame_crc++;
 628
 629         if (rq == 2) {
 630                 *processed_rq2 += 1;
 631                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 632                 dev_kfree_skb(skb);
 633         } else if (rq == 3) {
 634                 *processed_rq3 += 1;
 635                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 636                 dev_kfree_skb(skb);
 637         }
 638
 639         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 640                 if (netif_msg_rx_err(pr->port)) {
 641                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 642                                pr->qp->init_attr.qp_nr);
 643                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 644                 }
 645                 ehea_schedule_port_reset(pr->port);
 646                 return 1;
 647         }
 648
 649         return 0;
 650 }
 651
 652 static int ehea_proc_rwqes(struct net_device *dev,
 653                            struct ehea_port_res *pr,
 654                            int budget)
 655 {
 656         struct ehea_port *port = pr->port;
 657         struct ehea_qp *qp = pr->qp;
 658         struct ehea_cqe *cqe;
 659         struct sk_buff *skb;
 660         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 661         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 662         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 663         int skb_arr_rq1_len = pr->rq1_skba.len;
 664         int skb_arr_rq2_len = pr->rq2_skba.len;
 665         int skb_arr_rq3_len = pr->rq3_skba.len;
 666         int processed, processed_rq1, processed_rq2, processed_rq3;
 667         u64 processed_bytes = 0;
 668         int wqe_index, last_wqe_index, rq, port_reset;
 669
 670         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 671         last_wqe_index = 0;
 672
 673         cqe = ehea_poll_rq1(qp, &wqe_index);
 674         while ((processed < budget) && cqe) {
 675                 ehea_inc_rq1(qp);
 676                 processed_rq1++;
 677                 processed++;
 678                 if (netif_msg_rx_status(port))
 679                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 680
 681                 last_wqe_index = wqe_index;
 682                 rmb();
 683                 if (!ehea_check_cqe(cqe, &rq)) {
 684                         if (rq == 1) {
 685                                 /* LL RQ1 */
 686                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 687                                                           skb_arr_rq1_len,
 688                                                           wqe_index);
 689                                 if (unlikely(!skb)) {
 690                                         netif_info(port, rx_err, dev,
 691                                                   "LL rq1: skb=NULL\n");
 692
 693                                         skb = netdev_alloc_skb(dev,
 694                                                                EHEA_L_PKT_SIZE);
 695                                         if (!skb)
 696                                                 break;
 697                                 }
 698                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 699                                                  cqe->num_bytes_transfered - 4);
 700                                 ehea_fill_skb(dev, skb, cqe, pr);
 701                         } else if (rq == 2) {
 702                                 /* RQ2 */
 703                                 skb = get_skb_by_index(skb_arr_rq2,
 704                                                        skb_arr_rq2_len, cqe);
 705                                 if (unlikely(!skb)) {
 706                                         netif_err(port, rx_err, dev,
 707                                                   "rq2: skb=NULL\n");
 708                                         break;
 709                                 }
 710                                 ehea_fill_skb(dev, skb, cqe, pr);
 711                                 processed_rq2++;
 712                         } else {
 713                                 /* RQ3 */
 714                                 skb = get_skb_by_index(skb_arr_rq3,
 715                                                        skb_arr_rq3_len, cqe);
 716                                 if (unlikely(!skb)) {
 717                                         netif_err(port, rx_err, dev,
 718                                                   "rq3: skb=NULL\n");
 719                                         break;
 720                                 }
 721                                 ehea_fill_skb(dev, skb, cqe, pr);
 722                                 processed_rq3++;
 723                         }
 724
 725                         processed_bytes += skb->len;
 726
 727                         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 728                                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 729                                                        cqe->vlan_tag);
 730
 731                         napi_gro_receive(&pr->napi, skb);
 732                 } else {
 733                         pr->p_stats.poll_receive_errors++;
 734                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 735                                                            &processed_rq2,
 736                                                            &processed_rq3);
 737                         if (port_reset)
 738                                 break;
 739                 }
 740                 cqe = ehea_poll_rq1(qp, &wqe_index);
 741         }
 742
 743         pr->rx_packets += processed;
 744         pr->rx_bytes += processed_bytes;
 745
 746         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 747         ehea_refill_rq2(pr, processed_rq2);
 748         ehea_refill_rq3(pr, processed_rq3);
 749
 750         return processed;
 751 }
 752
 753 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 754
 755 static void reset_sq_restart_flag(struct ehea_port *port)
 756 {
 757         int i;
 758
 759         for (i = 0; i < port->num_def_qps; i++) {
 760                 struct ehea_port_res *pr = &port->port_res[i];
 761                 pr->sq_restart_flag = 0;
 762         }
 763         wake_up(&port->restart_wq);
 764 }
 765
 766 static void check_sqs(struct ehea_port *port)
 767 {
 768         struct ehea_swqe *swqe;
 769         int swqe_index;
 770         int i, k;
 771
 772         for (i = 0; i < port->num_def_qps; i++) {
 773                 struct ehea_port_res *pr = &port->port_res[i];
 774                 int ret;
 775                 k = 0;
 776                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 777                 memset(swqe, 0, SWQE_HEADER_SIZE);
 778                 atomic_dec(&pr->swqe_avail);
 779
 780                 swqe->tx_control |= EHEA_SWQE_PURGE;
 781                 swqe->wr_id = SWQE_RESTART_CHECK;
 782                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 783                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 784                 swqe->immediate_data_length = 80;
 785
 786                 ehea_post_swqe(pr->qp, swqe);
 787
 788                 ret = wait_event_timeout(port->restart_wq,
 789                                          pr->sq_restart_flag == 0,
 790                                          msecs_to_jiffies(100));
 791
 792                 if (!ret) {
 793                         pr_err("HW/SW queues out of sync\n");
 794                         ehea_schedule_port_reset(pr->port);
 795                         return;
 796                 }
 797         }
 798 }
 799
 800
 801 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 802 {
 803         struct sk_buff *skb;
 804         struct ehea_cq *send_cq = pr->send_cq;
 805         struct ehea_cqe *cqe;
 806         int quota = my_quota;
 807         int cqe_counter = 0;
 808         int swqe_av = 0;
 809         int index;
 810         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 811                                                 pr - &pr->port->port_res[0]);
 812
 813         cqe = ehea_poll_cq(send_cq);
 814         while (cqe && (quota > 0)) {
 815                 ehea_inc_cq(send_cq);
 816
 817                 cqe_counter++;
 818                 rmb();
 819
 820                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 821                         pr->sq_restart_flag = 1;
 822                         swqe_av++;
 823                         break;
 824                 }
 825
 826                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 827                         pr_err("Bad send completion status=0x%04X\n",
 828                                cqe->status);
 829
 830                         if (netif_msg_tx_err(pr->port))
 831                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 832
 833                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 834                                 pr_err("Resetting port\n");
 835                                 ehea_schedule_port_reset(pr->port);
 836                                 break;
 837                         }
 838                 }
 839
 840                 if (netif_msg_tx_done(pr->port))
 841                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 842
 843                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 844                            == EHEA_SWQE2_TYPE)) {
 845
 846                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 847                         skb = pr->sq_skba.arr[index];
 848                         dev_kfree_skb(skb);
 849                         pr->sq_skba.arr[index] = NULL;
 850                 }
 851
 852                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 853                 quota--;
 854
 855                 cqe = ehea_poll_cq(send_cq);
 856         }
 857
 858         ehea_update_feca(send_cq, cqe_counter);
 859         atomic_add(swqe_av, &pr->swqe_avail);
 860
 861         if (unlikely(netif_tx_queue_stopped(txq) &&
 862                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 863                 __netif_tx_lock(txq, smp_processor_id());
 864                 if (netif_tx_queue_stopped(txq) &&
 865                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 866                         netif_tx_wake_queue(txq);
 867                 __netif_tx_unlock(txq);
 868         }
 869
 870         wake_up(&pr->port->swqe_avail_wq);
 871
 872         return cqe;
 873 }
 874
 875 #define EHEA_POLL_MAX_CQES 65535
 876
 877 static int ehea_poll(struct napi_struct *napi, int budget)
 878 {
 879         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 880                                                 napi);
 881         struct net_device *dev = pr->port->netdev;
 882         struct ehea_cqe *cqe;
 883         struct ehea_cqe *cqe_skb = NULL;
 884         int wqe_index;
 885         int rx = 0;
 886
 887         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 888         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 889
 890         while (rx != budget) {
 891                 napi_complete(napi);
 892                 ehea_reset_cq_ep(pr->recv_cq);
 893                 ehea_reset_cq_ep(pr->send_cq);
 894                 ehea_reset_cq_n1(pr->recv_cq);
 895                 ehea_reset_cq_n1(pr->send_cq);
 896                 rmb();
 897                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 898                 cqe_skb = ehea_poll_cq(pr->send_cq);
 899
 900                 if (!cqe && !cqe_skb)
 901                         return rx;
 902
 903                 if (!napi_reschedule(napi))
 904                         return rx;
 905
 906                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 907                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 908         }
 909
 910         return rx;
 911 }
 912
 913 #ifdef CONFIG_NET_POLL_CONTROLLER
 914 static void ehea_netpoll(struct net_device *dev)
 915 {
 916         struct ehea_port *port = netdev_priv(dev);
 917         int i;
 918
 919         for (i = 0; i < port->num_def_qps; i++)
 920                 napi_schedule(&port->port_res[i].napi);
 921 }
 922 #endif
 923
 924 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 925 {
 926         struct ehea_port_res *pr = param;
 927
 928         napi_schedule(&pr->napi);
 929
 930         return IRQ_HANDLED;
 931 }
 932
 933 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 934 {
 935         struct ehea_port *port = param;
 936         struct ehea_eqe *eqe;
 937         struct ehea_qp *qp;
 938         u32 qp_token;
 939         u64 resource_type, aer, aerr;
 940         int reset_port = 0;
 941
 942         eqe = ehea_poll_eq(port->qp_eq);
 943
 944         while (eqe) {
 945                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 946                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 947                        eqe->entry, qp_token);
 948
 949                 qp = port->port_res[qp_token].qp;
 950
 951                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 952                                                 &aer, &aerr);
 953
 954                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 955                         if ((aer & EHEA_AER_RESET_MASK) ||
 956                             (aerr & EHEA_AERR_RESET_MASK))
 957                                  reset_port = 1;
 958                 } else
 959                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 960
 961                 eqe = ehea_poll_eq(port->qp_eq);
 962         }
 963
 964         if (reset_port) {
 965                 pr_err("Resetting port\n");
 966                 ehea_schedule_port_reset(port);
 967         }
 968
 969         return IRQ_HANDLED;
 970 }
 971
 972 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 973                                        int logical_port)
 974 {
 975         int i;
 976
 977         for (i = 0; i < EHEA_MAX_PORTS; i++)
 978                 if (adapter->port[i])
 979                         if (adapter->port[i]->logical_port_id == logical_port)
 980                                 return adapter->port[i];
 981         return NULL;
 982 }
 983
 984 int ehea_sense_port_attr(struct ehea_port *port)
 985 {
 986         int ret;
 987         u64 hret;
 988         struct hcp_ehea_port_cb0 *cb0;
 989
 990         /* may be called via ehea_neq_tasklet() */
 991         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 992         if (!cb0) {
 993                 pr_err("no mem for cb0\n");
 994                 ret = -ENOMEM;
 995                 goto out;
 996         }
 997
 998         hret = ehea_h_query_ehea_port(port->adapter->handle,
 999                                       port->logical_port_id, H_PORT_CB0,
1000                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1001                                       cb0);
1002         if (hret != H_SUCCESS) {
1003                 ret = -EIO;
1004                 goto out_free;
1005         }
1006
1007         /* MAC address */
1008         port->mac_addr = cb0->port_mac_addr << 16;
1009
1010         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1011                 ret = -EADDRNOTAVAIL;
1012                 goto out_free;
1013         }
1014
1015         /* Port speed */
1016         switch (cb0->port_speed) {
1017         case H_SPEED_10M_H:
1018                 port->port_speed = EHEA_SPEED_10M;
1019                 port->full_duplex = 0;
1020                 break;
1021         case H_SPEED_10M_F:
1022                 port->port_speed = EHEA_SPEED_10M;
1023                 port->full_duplex = 1;
1024                 break;
1025         case H_SPEED_100M_H:
1026                 port->port_speed = EHEA_SPEED_100M;
1027                 port->full_duplex = 0;
1028                 break;
1029         case H_SPEED_100M_F:
1030                 port->port_speed = EHEA_SPEED_100M;
1031                 port->full_duplex = 1;
1032                 break;
1033         case H_SPEED_1G_F:
1034                 port->port_speed = EHEA_SPEED_1G;
1035                 port->full_duplex = 1;
1036                 break;
1037         case H_SPEED_10G_F:
1038                 port->port_speed = EHEA_SPEED_10G;
1039                 port->full_duplex = 1;
1040                 break;
1041         default:
1042                 port->port_speed = 0;
1043                 port->full_duplex = 0;
1044                 break;
1045         }
1046
1047         port->autoneg = 1;
1048         port->num_mcs = cb0->num_default_qps;
1049
1050         /* Number of default QPs */
1051         if (use_mcs)
1052                 port->num_def_qps = cb0->num_default_qps;
1053         else
1054                 port->num_def_qps = 1;
1055
1056         if (!port->num_def_qps) {
1057                 ret = -EINVAL;
1058                 goto out_free;
1059         }
1060
1061         ret = 0;
1062 out_free:
1063         if (ret || netif_msg_probe(port))
1064                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1065         free_page((unsigned long)cb0);
1066 out:
1067         return ret;
1068 }
1069
1070 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1071 {
1072         struct hcp_ehea_port_cb4 *cb4;
1073         u64 hret;
1074         int ret = 0;
1075
1076         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1077         if (!cb4) {
1078                 pr_err("no mem for cb4\n");
1079                 ret = -ENOMEM;
1080                 goto out;
1081         }
1082
1083         cb4->port_speed = port_speed;
1084
1085         netif_carrier_off(port->netdev);
1086
1087         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1088                                        port->logical_port_id,
1089                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1090         if (hret == H_SUCCESS) {
1091                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1092
1093                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1094                                               port->logical_port_id,
1095                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1096                                               cb4);
1097                 if (hret == H_SUCCESS) {
1098                         switch (cb4->port_speed) {
1099                         case H_SPEED_10M_H:
1100                                 port->port_speed = EHEA_SPEED_10M;
1101                                 port->full_duplex = 0;
1102                                 break;
1103                         case H_SPEED_10M_F:
1104                                 port->port_speed = EHEA_SPEED_10M;
1105                                 port->full_duplex = 1;
1106                                 break;
1107                         case H_SPEED_100M_H:
1108                                 port->port_speed = EHEA_SPEED_100M;
1109                                 port->full_duplex = 0;
1110                                 break;
1111                         case H_SPEED_100M_F:
1112                                 port->port_speed = EHEA_SPEED_100M;
1113                                 port->full_duplex = 1;
1114                                 break;
1115                         case H_SPEED_1G_F:
1116                                 port->port_speed = EHEA_SPEED_1G;
1117                                 port->full_duplex = 1;
1118                                 break;
1119                         case H_SPEED_10G_F:
1120                                 port->port_speed = EHEA_SPEED_10G;
1121                                 port->full_duplex = 1;
1122                                 break;
1123                         default:
1124                                 port->port_speed = 0;
1125                                 port->full_duplex = 0;
1126                                 break;
1127                         }
1128                 } else {
1129                         pr_err("Failed sensing port speed\n");
1130                         ret = -EIO;
1131                 }
1132         } else {
1133                 if (hret == H_AUTHORITY) {
1134                         pr_info("Hypervisor denied setting port speed\n");
1135                         ret = -EPERM;
1136                 } else {
1137                         ret = -EIO;
1138                         pr_err("Failed setting port speed\n");
1139                 }
1140         }
1141         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1142                 netif_carrier_on(port->netdev);
1143
1144         free_page((unsigned long)cb4);
1145 out:
1146         return ret;
1147 }
1148
1149 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1150 {
1151         int ret;
1152         u8 ec;
1153         u8 portnum;
1154         struct ehea_port *port;
1155         struct net_device *dev;
1156
1157         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1158         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1159         port = ehea_get_port(adapter, portnum);
1160         dev = port->netdev;
1161
1162         switch (ec) {
1163         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1164
1165                 if (!port) {
1166                         netdev_err(dev, "unknown portnum %x\n", portnum);
1167                         break;
1168                 }
1169
1170                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1171                         if (!netif_carrier_ok(dev)) {
1172                                 ret = ehea_sense_port_attr(port);
1173                                 if (ret) {
1174                                         netdev_err(dev, "failed resensing port attributes\n");
1175                                         break;
1176                                 }
1177
1178                                 netif_info(port, link, dev,
1179                                            "Logical port up: %dMbps %s Duplex\n",
1180                                            port->port_speed,
1181                                            port->full_duplex == 1 ?
1182                                            "Full" : "Half");
1183
1184                                 netif_carrier_on(dev);
1185                                 netif_wake_queue(dev);
1186                         }
1187                 } else
1188                         if (netif_carrier_ok(dev)) {
1189                                 netif_info(port, link, dev,
1190                                            "Logical port down\n");
1191                                 netif_carrier_off(dev);
1192                                 netif_tx_disable(dev);
1193                         }
1194
1195                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1196                         port->phy_link = EHEA_PHY_LINK_UP;
1197                         netif_info(port, link, dev,
1198                                    "Physical port up\n");
1199                         if (prop_carrier_state)
1200                                 netif_carrier_on(dev);
1201                 } else {
1202                         port->phy_link = EHEA_PHY_LINK_DOWN;
1203                         netif_info(port, link, dev,
1204                                    "Physical port down\n");
1205                         if (prop_carrier_state)
1206                                 netif_carrier_off(dev);
1207                 }
1208
1209                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1210                         netdev_info(dev,
1211                                     "External switch port is primary port\n");
1212                 else
1213                         netdev_info(dev,
1214                                     "External switch port is backup port\n");
1215
1216                 break;
1217         case EHEA_EC_ADAPTER_MALFUNC:
1218                 netdev_err(dev, "Adapter malfunction\n");
1219                 break;
1220         case EHEA_EC_PORT_MALFUNC:
1221                 netdev_info(dev, "Port malfunction\n");
1222                 netif_carrier_off(dev);
1223                 netif_tx_disable(dev);
1224                 break;
1225         default:
1226                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1227                 break;
1228         }
1229 }
1230
1231 static void ehea_neq_tasklet(unsigned long data)
1232 {
1233         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1234         struct ehea_eqe *eqe;
1235         u64 event_mask;
1236
1237         eqe = ehea_poll_eq(adapter->neq);
1238         pr_debug("eqe=%p\n", eqe);
1239
1240         while (eqe) {
1241                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1242                 ehea_parse_eqe(adapter, eqe->entry);
1243                 eqe = ehea_poll_eq(adapter->neq);
1244                 pr_debug("next eqe=%p\n", eqe);
1245         }
1246
1247         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1248                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1249                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1250
1251         ehea_h_reset_events(adapter->handle,
1252                             adapter->neq->fw_handle, event_mask);
1253 }
1254
1255 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1256 {
1257         struct ehea_adapter *adapter = param;
1258         tasklet_hi_schedule(&adapter->neq_tasklet);
1259         return IRQ_HANDLED;
1260 }
1261
1262
1263 static int ehea_fill_port_res(struct ehea_port_res *pr)
1264 {
1265         int ret;
1266         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1267
1268         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1269
1270         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1271
1272         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1273
1274         return ret;
1275 }
1276
1277 static int ehea_reg_interrupts(struct net_device *dev)
1278 {
1279         struct ehea_port *port = netdev_priv(dev);
1280         struct ehea_port_res *pr;
1281         int i, ret;
1282
1283
1284         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1285                  dev->name);
1286
1287         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1288                                   ehea_qp_aff_irq_handler,
1289                                   IRQF_DISABLED, port->int_aff_name, port);
1290         if (ret) {
1291                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1292                            port->qp_eq->attr.ist1);
1293                 goto out_free_qpeq;
1294         }
1295
1296         netif_info(port, ifup, dev,
1297                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1298                    port->qp_eq->attr.ist1);
1299
1300
1301         for (i = 0; i < port->num_def_qps; i++) {
1302                 pr = &port->port_res[i];
1303                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1304                          "%s-queue%d", dev->name, i);
1305                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1306                                           ehea_recv_irq_handler,
1307                                           IRQF_DISABLED, pr->int_send_name,
1308                                           pr);
1309                 if (ret) {
1310                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1311                                    i, pr->eq->attr.ist1);
1312                         goto out_free_req;
1313                 }
1314                 netif_info(port, ifup, dev,
1315                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1316                            pr->eq->attr.ist1, i);
1317         }
1318 out:
1319         return ret;
1320
1321
1322 out_free_req:
1323         while (--i >= 0) {
1324                 u32 ist = port->port_res[i].eq->attr.ist1;
1325                 ibmebus_free_irq(ist, &port->port_res[i]);
1326         }
1327
1328 out_free_qpeq:
1329         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1330         i = port->num_def_qps;
1331
1332         goto out;
1333
1334 }
1335
1336 static void ehea_free_interrupts(struct net_device *dev)
1337 {
1338         struct ehea_port *port = netdev_priv(dev);
1339         struct ehea_port_res *pr;
1340         int i;
1341
1342         /* send */
1343
1344         for (i = 0; i < port->num_def_qps; i++) {
1345                 pr = &port->port_res[i];
1346                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1347                 netif_info(port, intr, dev,
1348                            "free send irq for res %d with handle 0x%X\n",
1349                            i, pr->eq->attr.ist1);
1350         }
1351
1352         /* associated events */
1353         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1354         netif_info(port, intr, dev,
1355                    "associated event interrupt for handle 0x%X freed\n",
1356                    port->qp_eq->attr.ist1);
1357 }
1358
1359 static int ehea_configure_port(struct ehea_port *port)
1360 {
1361         int ret, i;
1362         u64 hret, mask;
1363         struct hcp_ehea_port_cb0 *cb0;
1364
1365         ret = -ENOMEM;
1366         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1367         if (!cb0)
1368                 goto out;
1369
1370         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1371                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1372                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1373                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1374                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1375                                       PXLY_RC_VLAN_FILTER)
1376                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1377
1378         for (i = 0; i < port->num_mcs; i++)
1379                 if (use_mcs)
1380                         cb0->default_qpn_arr[i] =
1381                                 port->port_res[i].qp->init_attr.qp_nr;
1382                 else
1383                         cb0->default_qpn_arr[i] =
1384                                 port->port_res[0].qp->init_attr.qp_nr;
1385
1386         if (netif_msg_ifup(port))
1387                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1388
1389         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1390              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1391
1392         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1393                                        port->logical_port_id,
1394                                        H_PORT_CB0, mask, cb0);
1395         ret = -EIO;
1396         if (hret != H_SUCCESS)
1397                 goto out_free;
1398
1399         ret = 0;
1400
1401 out_free:
1402         free_page((unsigned long)cb0);
1403 out:
1404         return ret;
1405 }
1406
1407 static int ehea_gen_smrs(struct ehea_port_res *pr)
1408 {
1409         int ret;
1410         struct ehea_adapter *adapter = pr->port->adapter;
1411
1412         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1413         if (ret)
1414                 goto out;
1415
1416         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1417         if (ret)
1418                 goto out_free;
1419
1420         return 0;
1421
1422 out_free:
1423         ehea_rem_mr(&pr->send_mr);
1424 out:
1425         pr_err("Generating SMRS failed\n");
1426         return -EIO;
1427 }
1428
1429 static int ehea_rem_smrs(struct ehea_port_res *pr)
1430 {
1431         if ((ehea_rem_mr(&pr->send_mr)) ||
1432             (ehea_rem_mr(&pr->recv_mr)))
1433                 return -EIO;
1434         else
1435                 return 0;
1436 }
1437
1438 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1439 {
1440         int arr_size = sizeof(void *) * max_q_entries;
1441
1442         q_skba->arr = vzalloc(arr_size);
1443         if (!q_skba->arr)
1444                 return -ENOMEM;
1445
1446         q_skba->len = max_q_entries;
1447         q_skba->index = 0;
1448         q_skba->os_skbs = 0;
1449
1450         return 0;
1451 }
1452
1453 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1454                               struct port_res_cfg *pr_cfg, int queue_token)
1455 {
1456         struct ehea_adapter *adapter = port->adapter;
1457         enum ehea_eq_type eq_type = EHEA_EQ;
1458         struct ehea_qp_init_attr *init_attr = NULL;
1459         int ret = -EIO;
1460         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1461
1462         tx_bytes = pr->tx_bytes;
1463         tx_packets = pr->tx_packets;
1464         rx_bytes = pr->rx_bytes;
1465         rx_packets = pr->rx_packets;
1466
1467         memset(pr, 0, sizeof(struct ehea_port_res));
1468
1469         pr->tx_bytes = rx_bytes;
1470         pr->tx_packets = tx_packets;
1471         pr->rx_bytes = rx_bytes;
1472         pr->rx_packets = rx_packets;
1473
1474         pr->port = port;
1475
1476         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1477         if (!pr->eq) {
1478                 pr_err("create_eq failed (eq)\n");
1479                 goto out_free;
1480         }
1481
1482         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1483                                      pr->eq->fw_handle,
1484                                      port->logical_port_id);
1485         if (!pr->recv_cq) {
1486                 pr_err("create_cq failed (cq_recv)\n");
1487                 goto out_free;
1488         }
1489
1490         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1491                                      pr->eq->fw_handle,
1492                                      port->logical_port_id);
1493         if (!pr->send_cq) {
1494                 pr_err("create_cq failed (cq_send)\n");
1495                 goto out_free;
1496         }
1497
1498         if (netif_msg_ifup(port))
1499                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1500                         pr->send_cq->attr.act_nr_of_cqes,
1501                         pr->recv_cq->attr.act_nr_of_cqes);
1502
1503         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1504         if (!init_attr) {
1505                 ret = -ENOMEM;
1506                 pr_err("no mem for ehea_qp_init_attr\n");
1507                 goto out_free;
1508         }
1509
1510         init_attr->low_lat_rq1 = 1;
1511         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1512         init_attr->rq_count = 3;
1513         init_attr->qp_token = queue_token;
1514         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1515         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1516         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1517         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1518         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1519         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1520         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1521         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1522         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1523         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1524         init_attr->port_nr = port->logical_port_id;
1525         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1526         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1527         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1528
1529         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1530         if (!pr->qp) {
1531                 pr_err("create_qp failed\n");
1532                 ret = -EIO;
1533                 goto out_free;
1534         }
1535
1536         if (netif_msg_ifup(port))
1537                 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",
1538                         init_attr->qp_nr,
1539                         init_attr->act_nr_send_wqes,
1540                         init_attr->act_nr_rwqes_rq1,
1541                         init_attr->act_nr_rwqes_rq2,
1542                         init_attr->act_nr_rwqes_rq3);
1543
1544         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1545
1546         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1547         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1548         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1549         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1550         if (ret)
1551                 goto out_free;
1552
1553         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1554         if (ehea_gen_smrs(pr) != 0) {
1555                 ret = -EIO;
1556                 goto out_free;
1557         }
1558
1559         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1560
1561         kfree(init_attr);
1562
1563         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1564
1565         ret = 0;
1566         goto out;
1567
1568 out_free:
1569         kfree(init_attr);
1570         vfree(pr->sq_skba.arr);
1571         vfree(pr->rq1_skba.arr);
1572         vfree(pr->rq2_skba.arr);
1573         vfree(pr->rq3_skba.arr);
1574         ehea_destroy_qp(pr->qp);
1575         ehea_destroy_cq(pr->send_cq);
1576         ehea_destroy_cq(pr->recv_cq);
1577         ehea_destroy_eq(pr->eq);
1578 out:
1579         return ret;
1580 }
1581
1582 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1583 {
1584         int ret, i;
1585
1586         if (pr->qp)
1587                 netif_napi_del(&pr->napi);
1588
1589         ret = ehea_destroy_qp(pr->qp);
1590
1591         if (!ret) {
1592                 ehea_destroy_cq(pr->send_cq);
1593                 ehea_destroy_cq(pr->recv_cq);
1594                 ehea_destroy_eq(pr->eq);
1595
1596                 for (i = 0; i < pr->rq1_skba.len; i++)
1597                         if (pr->rq1_skba.arr[i])
1598                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1599
1600                 for (i = 0; i < pr->rq2_skba.len; i++)
1601                         if (pr->rq2_skba.arr[i])
1602                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1603
1604                 for (i = 0; i < pr->rq3_skba.len; i++)
1605                         if (pr->rq3_skba.arr[i])
1606                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1607
1608                 for (i = 0; i < pr->sq_skba.len; i++)
1609                         if (pr->sq_skba.arr[i])
1610                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1611
1612                 vfree(pr->rq1_skba.arr);
1613                 vfree(pr->rq2_skba.arr);
1614                 vfree(pr->rq3_skba.arr);
1615                 vfree(pr->sq_skba.arr);
1616                 ret = ehea_rem_smrs(pr);
1617         }
1618         return ret;
1619 }
1620
1621 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1622                                   u32 lkey)
1623 {
1624         int skb_data_size = skb_headlen(skb);
1625         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1626         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1627         unsigned int immediate_len = SWQE2_MAX_IMM;
1628
1629         swqe->descriptors = 0;
1630
1631         if (skb_is_gso(skb)) {
1632                 swqe->tx_control |= EHEA_SWQE_TSO;
1633                 swqe->mss = skb_shinfo(skb)->gso_size;
1634                 /*
1635                  * For TSO packets we only copy the headers into the
1636                  * immediate area.
1637                  */
1638                 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1639         }
1640
1641         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1642                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1643                 swqe->immediate_data_length = immediate_len;
1644
1645                 if (skb_data_size > immediate_len) {
1646                         sg1entry->l_key = lkey;
1647                         sg1entry->len = skb_data_size - immediate_len;
1648                         sg1entry->vaddr =
1649                                 ehea_map_vaddr(skb->data + immediate_len);
1650                         swqe->descriptors++;
1651                 }
1652         } else {
1653                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1654                 swqe->immediate_data_length = skb_data_size;
1655         }
1656 }
1657
1658 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1659                                     struct ehea_swqe *swqe, u32 lkey)
1660 {
1661         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1662         skb_frag_t *frag;
1663         int nfrags, sg1entry_contains_frag_data, i;
1664
1665         nfrags = skb_shinfo(skb)->nr_frags;
1666         sg1entry = &swqe->u.immdata_desc.sg_entry;
1667         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1668         sg1entry_contains_frag_data = 0;
1669
1670         write_swqe2_immediate(skb, swqe, lkey);
1671
1672         /* write descriptors */
1673         if (nfrags > 0) {
1674                 if (swqe->descriptors == 0) {
1675                         /* sg1entry not yet used */
1676                         frag = &skb_shinfo(skb)->frags[0];
1677
1678                         /* copy sg1entry data */
1679                         sg1entry->l_key = lkey;
1680                         sg1entry->len = skb_frag_size(frag);
1681                         sg1entry->vaddr =
1682                                 ehea_map_vaddr(skb_frag_address(frag));
1683                         swqe->descriptors++;
1684                         sg1entry_contains_frag_data = 1;
1685                 }
1686
1687                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1688
1689                         frag = &skb_shinfo(skb)->frags[i];
1690                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1691
1692                         sgentry->l_key = lkey;
1693                         sgentry->len = skb_frag_size(frag);
1694                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1695                         swqe->descriptors++;
1696                 }
1697         }
1698 }
1699
1700 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1701 {
1702         int ret = 0;
1703         u64 hret;
1704         u8 reg_type;
1705
1706         /* De/Register untagged packets */
1707         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1708         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1709                                      port->logical_port_id,
1710                                      reg_type, port->mac_addr, 0, hcallid);
1711         if (hret != H_SUCCESS) {
1712                 pr_err("%sregistering bc address failed (tagged)\n",
1713                        hcallid == H_REG_BCMC ? "" : "de");
1714                 ret = -EIO;
1715                 goto out_herr;
1716         }
1717
1718         /* De/Register VLAN packets */
1719         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1720         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1721                                      port->logical_port_id,
1722                                      reg_type, port->mac_addr, 0, hcallid);
1723         if (hret != H_SUCCESS) {
1724                 pr_err("%sregistering bc address failed (vlan)\n",
1725                        hcallid == H_REG_BCMC ? "" : "de");
1726                 ret = -EIO;
1727         }
1728 out_herr:
1729         return ret;
1730 }
1731
1732 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1733 {
1734         struct ehea_port *port = netdev_priv(dev);
1735         struct sockaddr *mac_addr = sa;
1736         struct hcp_ehea_port_cb0 *cb0;
1737         int ret;
1738         u64 hret;
1739
1740         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1741                 ret = -EADDRNOTAVAIL;
1742                 goto out;
1743         }
1744
1745         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1746         if (!cb0) {
1747                 pr_err("no mem for cb0\n");
1748                 ret = -ENOMEM;
1749                 goto out;
1750         }
1751
1752         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1753
1754         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1755
1756         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1757                                        port->logical_port_id, H_PORT_CB0,
1758                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1759         if (hret != H_SUCCESS) {
1760                 ret = -EIO;
1761                 goto out_free;
1762         }
1763
1764         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1765
1766         /* Deregister old MAC in pHYP */
1767         if (port->state == EHEA_PORT_UP) {
1768                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1769                 if (ret)
1770                         goto out_upregs;
1771         }
1772
1773         port->mac_addr = cb0->port_mac_addr << 16;
1774
1775         /* Register new MAC in pHYP */
1776         if (port->state == EHEA_PORT_UP) {
1777                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1778                 if (ret)
1779                         goto out_upregs;
1780         }
1781
1782         ret = 0;
1783
1784 out_upregs:
1785         ehea_update_bcmc_registrations();
1786 out_free:
1787         free_page((unsigned long)cb0);
1788 out:
1789         return ret;
1790 }
1791
1792 static void ehea_promiscuous_error(u64 hret, int enable)
1793 {
1794         if (hret == H_AUTHORITY)
1795                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1796                         enable == 1 ? "en" : "dis");
1797         else
1798                 pr_err("failed %sabling promiscuous mode\n",
1799                        enable == 1 ? "en" : "dis");
1800 }
1801
1802 static void ehea_promiscuous(struct net_device *dev, int enable)
1803 {
1804         struct ehea_port *port = netdev_priv(dev);
1805         struct hcp_ehea_port_cb7 *cb7;
1806         u64 hret;
1807
1808         if (enable == port->promisc)
1809                 return;
1810
1811         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1812         if (!cb7) {
1813                 pr_err("no mem for cb7\n");
1814                 goto out;
1815         }
1816
1817         /* Modify Pxs_DUCQPN in CB7 */
1818         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1819
1820         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1821                                        port->logical_port_id,
1822                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1823         if (hret) {
1824                 ehea_promiscuous_error(hret, enable);
1825                 goto out;
1826         }
1827
1828         port->promisc = enable;
1829 out:
1830         free_page((unsigned long)cb7);
1831 }
1832
1833 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1834                                      u32 hcallid)
1835 {
1836         u64 hret;
1837         u8 reg_type;
1838
1839         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1840         if (mc_mac_addr == 0)
1841                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1842
1843         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1844                                      port->logical_port_id,
1845                                      reg_type, mc_mac_addr, 0, hcallid);
1846         if (hret)
1847                 goto out;
1848
1849         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1850         if (mc_mac_addr == 0)
1851                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1852
1853         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1854                                      port->logical_port_id,
1855                                      reg_type, mc_mac_addr, 0, hcallid);
1856 out:
1857         return hret;
1858 }
1859
1860 static int ehea_drop_multicast_list(struct net_device *dev)
1861 {
1862         struct ehea_port *port = netdev_priv(dev);
1863         struct ehea_mc_list *mc_entry = port->mc_list;
1864         struct list_head *pos;
1865         struct list_head *temp;
1866         int ret = 0;
1867         u64 hret;
1868
1869         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1870                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1871
1872                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1873                                                  H_DEREG_BCMC);
1874                 if (hret) {
1875                         pr_err("failed deregistering mcast MAC\n");
1876                         ret = -EIO;
1877                 }
1878
1879                 list_del(pos);
1880                 kfree(mc_entry);
1881         }
1882         return ret;
1883 }
1884
1885 static void ehea_allmulti(struct net_device *dev, int enable)
1886 {
1887         struct ehea_port *port = netdev_priv(dev);
1888         u64 hret;
1889
1890         if (!port->allmulti) {
1891                 if (enable) {
1892                         /* Enable ALLMULTI */
1893                         ehea_drop_multicast_list(dev);
1894                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1895                         if (!hret)
1896                                 port->allmulti = 1;
1897                         else
1898                                 netdev_err(dev,
1899                                            "failed enabling IFF_ALLMULTI\n");
1900                 }
1901         } else {
1902                 if (!enable) {
1903                         /* Disable ALLMULTI */
1904                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1905                         if (!hret)
1906                                 port->allmulti = 0;
1907                         else
1908                                 netdev_err(dev,
1909                                            "failed disabling IFF_ALLMULTI\n");
1910                 }
1911         }
1912 }
1913
1914 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1915 {
1916         struct ehea_mc_list *ehea_mcl_entry;
1917         u64 hret;
1918
1919         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1920         if (!ehea_mcl_entry)
1921                 return;
1922
1923         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1924
1925         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1926
1927         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1928                                          H_REG_BCMC);
1929         if (!hret)
1930                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1931         else {
1932                 pr_err("failed registering mcast MAC\n");
1933                 kfree(ehea_mcl_entry);
1934         }
1935 }
1936
1937 static void ehea_set_multicast_list(struct net_device *dev)
1938 {
1939         struct ehea_port *port = netdev_priv(dev);
1940         struct netdev_hw_addr *ha;
1941         int ret;
1942
1943         ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1944
1945         if (dev->flags & IFF_ALLMULTI) {
1946                 ehea_allmulti(dev, 1);
1947                 goto out;
1948         }
1949         ehea_allmulti(dev, 0);
1950
1951         if (!netdev_mc_empty(dev)) {
1952                 ret = ehea_drop_multicast_list(dev);
1953                 if (ret) {
1954                         /* Dropping the current multicast list failed.
1955                          * Enabling ALL_MULTI is the best we can do.
1956                          */
1957                         ehea_allmulti(dev, 1);
1958                 }
1959
1960                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1961                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1962                                 port->adapter->max_mc_mac);
1963                         goto out;
1964                 }
1965
1966                 netdev_for_each_mc_addr(ha, dev)
1967                         ehea_add_multicast_entry(port, ha->addr);
1968
1969         }
1970 out:
1971         ehea_update_bcmc_registrations();
1972 }
1973
1974 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1975 {
1976         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1977                 return -EINVAL;
1978         dev->mtu = new_mtu;
1979         return 0;
1980 }
1981
1982 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1983 {
1984         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1985
1986         if (skb->protocol != htons(ETH_P_IP))
1987                 return;
1988
1989         if (skb->ip_summed == CHECKSUM_PARTIAL)
1990                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1991
1992         swqe->ip_start = skb_network_offset(skb);
1993         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1994
1995         switch (ip_hdr(skb)->protocol) {
1996         case IPPROTO_UDP:
1997                 if (skb->ip_summed == CHECKSUM_PARTIAL)
1998                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1999
2000                 swqe->tcp_offset = swqe->ip_end + 1 +
2001                                    offsetof(struct udphdr, check);
2002                 break;
2003
2004         case IPPROTO_TCP:
2005                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2006                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2007
2008                 swqe->tcp_offset = swqe->ip_end + 1 +
2009                                    offsetof(struct tcphdr, check);
2010                 break;
2011         }
2012 }
2013
2014 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2015                        struct ehea_swqe *swqe, u32 lkey)
2016 {
2017         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2018
2019         xmit_common(skb, swqe);
2020
2021         write_swqe2_data(skb, dev, swqe, lkey);
2022 }
2023
2024 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2025                        struct ehea_swqe *swqe)
2026 {
2027         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2028
2029         xmit_common(skb, swqe);
2030
2031         if (!skb->data_len)
2032                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2033         else
2034                 skb_copy_bits(skb, 0, imm_data, skb->len);
2035
2036         swqe->immediate_data_length = skb->len;
2037         dev_kfree_skb(skb);
2038 }
2039
2040 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2041 {
2042         struct ehea_port *port = netdev_priv(dev);
2043         struct ehea_swqe *swqe;
2044         u32 lkey;
2045         int swqe_index;
2046         struct ehea_port_res *pr;
2047         struct netdev_queue *txq;
2048
2049         pr = &port->port_res[skb_get_queue_mapping(skb)];
2050         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2051
2052         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2053         memset(swqe, 0, SWQE_HEADER_SIZE);
2054         atomic_dec(&pr->swqe_avail);
2055
2056         if (vlan_tx_tag_present(skb)) {
2057                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2058                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2059         }
2060
2061         pr->tx_packets++;
2062         pr->tx_bytes += skb->len;
2063
2064         if (skb->len <= SWQE3_MAX_IMM) {
2065                 u32 sig_iv = port->sig_comp_iv;
2066                 u32 swqe_num = pr->swqe_id_counter;
2067                 ehea_xmit3(skb, dev, swqe);
2068                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2069                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2070                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2071                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2072                                                       sig_iv);
2073                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2074                         pr->swqe_ll_count = 0;
2075                 } else
2076                         pr->swqe_ll_count += 1;
2077         } else {
2078                 swqe->wr_id =
2079                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2080                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2081                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2082                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2083                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2084
2085                 pr->sq_skba.index++;
2086                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2087
2088                 lkey = pr->send_mr.lkey;
2089                 ehea_xmit2(skb, dev, swqe, lkey);
2090                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2091         }
2092         pr->swqe_id_counter += 1;
2093
2094         netif_info(port, tx_queued, dev,
2095                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2096         if (netif_msg_tx_queued(port))
2097                 ehea_dump(swqe, 512, "swqe");
2098
2099         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2100                 netif_tx_stop_queue(txq);
2101                 swqe->tx_control |= EHEA_SWQE_PURGE;
2102         }
2103
2104         ehea_post_swqe(pr->qp, swqe);
2105
2106         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2107                 pr->p_stats.queue_stopped++;
2108                 netif_tx_stop_queue(txq);
2109         }
2110
2111         return NETDEV_TX_OK;
2112 }
2113
2114 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2115 {
2116         struct ehea_port *port = netdev_priv(dev);
2117         struct ehea_adapter *adapter = port->adapter;
2118         struct hcp_ehea_port_cb1 *cb1;
2119         int index;
2120         u64 hret;
2121         int err = 0;
2122
2123         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2124         if (!cb1) {
2125                 pr_err("no mem for cb1\n");
2126                 err = -ENOMEM;
2127                 goto out;
2128         }
2129
2130         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2131                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2132         if (hret != H_SUCCESS) {
2133                 pr_err("query_ehea_port failed\n");
2134                 err = -EINVAL;
2135                 goto out;
2136         }
2137
2138         index = (vid / 64);
2139         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2140
2141         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2142                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2143         if (hret != H_SUCCESS) {
2144                 pr_err("modify_ehea_port failed\n");
2145                 err = -EINVAL;
2146         }
2147 out:
2148         free_page((unsigned long)cb1);
2149         return err;
2150 }
2151
2152 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2153 {
2154         struct ehea_port *port = netdev_priv(dev);
2155         struct ehea_adapter *adapter = port->adapter;
2156         struct hcp_ehea_port_cb1 *cb1;
2157         int index;
2158         u64 hret;
2159         int err = 0;
2160
2161         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2162         if (!cb1) {
2163                 pr_err("no mem for cb1\n");
2164                 err = -ENOMEM;
2165                 goto out;
2166         }
2167
2168         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2169                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2170         if (hret != H_SUCCESS) {
2171                 pr_err("query_ehea_port failed\n");
2172                 err = -EINVAL;
2173                 goto out;
2174         }
2175
2176         index = (vid / 64);
2177         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2178
2179         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2180                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2181         if (hret != H_SUCCESS) {
2182                 pr_err("modify_ehea_port failed\n");
2183                 err = -EINVAL;
2184         }
2185 out:
2186         free_page((unsigned long)cb1);
2187         return err;
2188 }
2189
2190 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2191 {
2192         int ret = -EIO;
2193         u64 hret;
2194         u16 dummy16 = 0;
2195         u64 dummy64 = 0;
2196         struct hcp_modify_qp_cb0 *cb0;
2197
2198         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2199         if (!cb0) {
2200                 ret = -ENOMEM;
2201                 goto out;
2202         }
2203
2204         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2205                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2206         if (hret != H_SUCCESS) {
2207                 pr_err("query_ehea_qp failed (1)\n");
2208                 goto out;
2209         }
2210
2211         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2212         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2213                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2214                                      &dummy64, &dummy64, &dummy16, &dummy16);
2215         if (hret != H_SUCCESS) {
2216                 pr_err("modify_ehea_qp failed (1)\n");
2217                 goto out;
2218         }
2219
2220         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2221                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2222         if (hret != H_SUCCESS) {
2223                 pr_err("query_ehea_qp failed (2)\n");
2224                 goto out;
2225         }
2226
2227         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2228         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2229                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2230                                      &dummy64, &dummy64, &dummy16, &dummy16);
2231         if (hret != H_SUCCESS) {
2232                 pr_err("modify_ehea_qp failed (2)\n");
2233                 goto out;
2234         }
2235
2236         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2237                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2238         if (hret != H_SUCCESS) {
2239                 pr_err("query_ehea_qp failed (3)\n");
2240                 goto out;
2241         }
2242
2243         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2244         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2245                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2246                                      &dummy64, &dummy64, &dummy16, &dummy16);
2247         if (hret != H_SUCCESS) {
2248                 pr_err("modify_ehea_qp failed (3)\n");
2249                 goto out;
2250         }
2251
2252         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2253                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2254         if (hret != H_SUCCESS) {
2255                 pr_err("query_ehea_qp failed (4)\n");
2256                 goto out;
2257         }
2258
2259         ret = 0;
2260 out:
2261         free_page((unsigned long)cb0);
2262         return ret;
2263 }
2264
2265 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2266 {
2267         int ret, i;
2268         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2269         enum ehea_eq_type eq_type = EHEA_EQ;
2270
2271         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2272                                    EHEA_MAX_ENTRIES_EQ, 1);
2273         if (!port->qp_eq) {
2274                 ret = -EINVAL;
2275                 pr_err("ehea_create_eq failed (qp_eq)\n");
2276                 goto out_kill_eq;
2277         }
2278
2279         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2280         pr_cfg.max_entries_scq = sq_entries * 2;
2281         pr_cfg.max_entries_sq = sq_entries;
2282         pr_cfg.max_entries_rq1 = rq1_entries;
2283         pr_cfg.max_entries_rq2 = rq2_entries;
2284         pr_cfg.max_entries_rq3 = rq3_entries;
2285
2286         pr_cfg_small_rx.max_entries_rcq = 1;
2287         pr_cfg_small_rx.max_entries_scq = sq_entries;
2288         pr_cfg_small_rx.max_entries_sq = sq_entries;
2289         pr_cfg_small_rx.max_entries_rq1 = 1;
2290         pr_cfg_small_rx.max_entries_rq2 = 1;
2291         pr_cfg_small_rx.max_entries_rq3 = 1;
2292
2293         for (i = 0; i < def_qps; i++) {
2294                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2295                 if (ret)
2296                         goto out_clean_pr;
2297         }
2298         for (i = def_qps; i < def_qps; i++) {
2299                 ret = ehea_init_port_res(port, &port->port_res[i],
2300                                          &pr_cfg_small_rx, i);
2301                 if (ret)
2302                         goto out_clean_pr;
2303         }
2304
2305         return 0;
2306
2307 out_clean_pr:
2308         while (--i >= 0)
2309                 ehea_clean_portres(port, &port->port_res[i]);
2310
2311 out_kill_eq:
2312         ehea_destroy_eq(port->qp_eq);
2313         return ret;
2314 }
2315
2316 static int ehea_clean_all_portres(struct ehea_port *port)
2317 {
2318         int ret = 0;
2319         int i;
2320
2321         for (i = 0; i < port->num_def_qps; i++)
2322                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2323
2324         ret |= ehea_destroy_eq(port->qp_eq);
2325
2326         return ret;
2327 }
2328
2329 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2330 {
2331         if (adapter->active_ports)
2332                 return;
2333
2334         ehea_rem_mr(&adapter->mr);
2335 }
2336
2337 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2338 {
2339         if (adapter->active_ports)
2340                 return 0;
2341
2342         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2343 }
2344
2345 static int ehea_up(struct net_device *dev)
2346 {
2347         int ret, i;
2348         struct ehea_port *port = netdev_priv(dev);
2349
2350         if (port->state == EHEA_PORT_UP)
2351                 return 0;
2352
2353         ret = ehea_port_res_setup(port, port->num_def_qps);
2354         if (ret) {
2355                 netdev_err(dev, "port_res_failed\n");
2356                 goto out;
2357         }
2358
2359         /* Set default QP for this port */
2360         ret = ehea_configure_port(port);
2361         if (ret) {
2362                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2363                 goto out_clean_pr;
2364         }
2365
2366         ret = ehea_reg_interrupts(dev);
2367         if (ret) {
2368                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2369                 goto out_clean_pr;
2370         }
2371
2372         for (i = 0; i < port->num_def_qps; i++) {
2373                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2374                 if (ret) {
2375                         netdev_err(dev, "activate_qp failed\n");
2376                         goto out_free_irqs;
2377                 }
2378         }
2379
2380         for (i = 0; i < port->num_def_qps; i++) {
2381                 ret = ehea_fill_port_res(&port->port_res[i]);
2382                 if (ret) {
2383                         netdev_err(dev, "out_free_irqs\n");
2384                         goto out_free_irqs;
2385                 }
2386         }
2387
2388         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2389         if (ret) {
2390                 ret = -EIO;
2391                 goto out_free_irqs;
2392         }
2393
2394         port->state = EHEA_PORT_UP;
2395
2396         ret = 0;
2397         goto out;
2398
2399 out_free_irqs:
2400         ehea_free_interrupts(dev);
2401
2402 out_clean_pr:
2403         ehea_clean_all_portres(port);
2404 out:
2405         if (ret)
2406                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2407
2408         ehea_update_bcmc_registrations();
2409         ehea_update_firmware_handles();
2410
2411         return ret;
2412 }
2413
2414 static void port_napi_disable(struct ehea_port *port)
2415 {
2416         int i;
2417
2418         for (i = 0; i < port->num_def_qps; i++)
2419                 napi_disable(&port->port_res[i].napi);
2420 }
2421
2422 static void port_napi_enable(struct ehea_port *port)
2423 {
2424         int i;
2425
2426         for (i = 0; i < port->num_def_qps; i++)
2427                 napi_enable(&port->port_res[i].napi);
2428 }
2429
2430 static int ehea_open(struct net_device *dev)
2431 {
2432         int ret;
2433         struct ehea_port *port = netdev_priv(dev);
2434
2435         mutex_lock(&port->port_lock);
2436
2437         netif_info(port, ifup, dev, "enabling port\n");
2438
2439         ret = ehea_up(dev);
2440         if (!ret) {
2441                 port_napi_enable(port);
2442                 netif_tx_start_all_queues(dev);
2443         }
2444
2445         mutex_unlock(&port->port_lock);
2446         schedule_delayed_work(&port->stats_work,
2447                               round_jiffies_relative(msecs_to_jiffies(1000)));
2448
2449         return ret;
2450 }
2451
2452 static int ehea_down(struct net_device *dev)
2453 {
2454         int ret;
2455         struct ehea_port *port = netdev_priv(dev);
2456
2457         if (port->state == EHEA_PORT_DOWN)
2458                 return 0;
2459
2460         ehea_drop_multicast_list(dev);
2461         ehea_allmulti(dev, 0);
2462         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2463
2464         ehea_free_interrupts(dev);
2465
2466         port->state = EHEA_PORT_DOWN;
2467
2468         ehea_update_bcmc_registrations();
2469
2470         ret = ehea_clean_all_portres(port);
2471         if (ret)
2472                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2473
2474         ehea_update_firmware_handles();
2475
2476         return ret;
2477 }
2478
2479 static int ehea_stop(struct net_device *dev)
2480 {
2481         int ret;
2482         struct ehea_port *port = netdev_priv(dev);
2483
2484         netif_info(port, ifdown, dev, "disabling port\n");
2485
2486         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2487         cancel_work_sync(&port->reset_task);
2488         cancel_delayed_work_sync(&port->stats_work);
2489         mutex_lock(&port->port_lock);
2490         netif_tx_stop_all_queues(dev);
2491         port_napi_disable(port);
2492         ret = ehea_down(dev);
2493         mutex_unlock(&port->port_lock);
2494         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2495         return ret;
2496 }
2497
2498 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2499 {
2500         struct ehea_qp qp = *orig_qp;
2501         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2502         struct ehea_swqe *swqe;
2503         int wqe_index;
2504         int i;
2505
2506         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2507                 swqe = ehea_get_swqe(&qp, &wqe_index);
2508                 swqe->tx_control |= EHEA_SWQE_PURGE;
2509         }
2510 }
2511
2512 static void ehea_flush_sq(struct ehea_port *port)
2513 {
2514         int i;
2515
2516         for (i = 0; i < port->num_def_qps; i++) {
2517                 struct ehea_port_res *pr = &port->port_res[i];
2518                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2519                 int ret;
2520
2521                 ret = wait_event_timeout(port->swqe_avail_wq,
2522                          atomic_read(&pr->swqe_avail) >= swqe_max,
2523                          msecs_to_jiffies(100));
2524
2525                 if (!ret) {
2526                         pr_err("WARNING: sq not flushed completely\n");
2527                         break;
2528                 }
2529         }
2530 }
2531
2532 static int ehea_stop_qps(struct net_device *dev)
2533 {
2534         struct ehea_port *port = netdev_priv(dev);
2535         struct ehea_adapter *adapter = port->adapter;
2536         struct hcp_modify_qp_cb0 *cb0;
2537         int ret = -EIO;
2538         int dret;
2539         int i;
2540         u64 hret;
2541         u64 dummy64 = 0;
2542         u16 dummy16 = 0;
2543
2544         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2545         if (!cb0) {
2546                 ret = -ENOMEM;
2547                 goto out;
2548         }
2549
2550         for (i = 0; i < (port->num_def_qps); i++) {
2551                 struct ehea_port_res *pr =  &port->port_res[i];
2552                 struct ehea_qp *qp = pr->qp;
2553
2554                 /* Purge send queue */
2555                 ehea_purge_sq(qp);
2556
2557                 /* Disable queue pair */
2558                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2559                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2560                                             cb0);
2561                 if (hret != H_SUCCESS) {
2562                         pr_err("query_ehea_qp failed (1)\n");
2563                         goto out;
2564                 }
2565
2566                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2567                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2568
2569                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2570                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2571                                                             1), cb0, &dummy64,
2572                                              &dummy64, &dummy16, &dummy16);
2573                 if (hret != H_SUCCESS) {
2574                         pr_err("modify_ehea_qp failed (1)\n");
2575                         goto out;
2576                 }
2577
2578                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2579                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2580                                             cb0);
2581                 if (hret != H_SUCCESS) {
2582                         pr_err("query_ehea_qp failed (2)\n");
2583                         goto out;
2584                 }
2585
2586                 /* deregister shared memory regions */
2587                 dret = ehea_rem_smrs(pr);
2588                 if (dret) {
2589                         pr_err("unreg shared memory region failed\n");
2590                         goto out;
2591                 }
2592         }
2593
2594         ret = 0;
2595 out:
2596         free_page((unsigned long)cb0);
2597
2598         return ret;
2599 }
2600
2601 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2602 {
2603         struct ehea_qp qp = *orig_qp;
2604         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2605         struct ehea_rwqe *rwqe;
2606         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2607         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2608         struct sk_buff *skb;
2609         u32 lkey = pr->recv_mr.lkey;
2610
2611
2612         int i;
2613         int index;
2614
2615         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2616                 rwqe = ehea_get_next_rwqe(&qp, 2);
2617                 rwqe->sg_list[0].l_key = lkey;
2618                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2619                 skb = skba_rq2[index];
2620                 if (skb)
2621                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2622         }
2623
2624         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2625                 rwqe = ehea_get_next_rwqe(&qp, 3);
2626                 rwqe->sg_list[0].l_key = lkey;
2627                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2628                 skb = skba_rq3[index];
2629                 if (skb)
2630                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2631         }
2632 }
2633
2634 static int ehea_restart_qps(struct net_device *dev)
2635 {
2636         struct ehea_port *port = netdev_priv(dev);
2637         struct ehea_adapter *adapter = port->adapter;
2638         int ret = 0;
2639         int i;
2640
2641         struct hcp_modify_qp_cb0 *cb0;
2642         u64 hret;
2643         u64 dummy64 = 0;
2644         u16 dummy16 = 0;
2645
2646         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2647         if (!cb0) {
2648                 ret = -ENOMEM;
2649                 goto out;
2650         }
2651
2652         for (i = 0; i < (port->num_def_qps); i++) {
2653                 struct ehea_port_res *pr =  &port->port_res[i];
2654                 struct ehea_qp *qp = pr->qp;
2655
2656                 ret = ehea_gen_smrs(pr);
2657                 if (ret) {
2658                         netdev_err(dev, "creation of shared memory regions failed\n");
2659                         goto out;
2660                 }
2661
2662                 ehea_update_rqs(qp, pr);
2663
2664                 /* Enable queue pair */
2665                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2666                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2667                                             cb0);
2668                 if (hret != H_SUCCESS) {
2669                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2670                         goto out;
2671                 }
2672
2673                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2674                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2675
2676                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2677                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2678                                                             1), cb0, &dummy64,
2679                                              &dummy64, &dummy16, &dummy16);
2680                 if (hret != H_SUCCESS) {
2681                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2682                         goto out;
2683                 }
2684
2685                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2686                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2687                                             cb0);
2688                 if (hret != H_SUCCESS) {
2689                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2690                         goto out;
2691                 }
2692
2693                 /* refill entire queue */
2694                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2695                 ehea_refill_rq2(pr, 0);
2696                 ehea_refill_rq3(pr, 0);
2697         }
2698 out:
2699         free_page((unsigned long)cb0);
2700
2701         return ret;
2702 }
2703
2704 static void ehea_reset_port(struct work_struct *work)
2705 {
2706         int ret;
2707         struct ehea_port *port =
2708                 container_of(work, struct ehea_port, reset_task);
2709         struct net_device *dev = port->netdev;
2710
2711         mutex_lock(&dlpar_mem_lock);
2712         port->resets++;
2713         mutex_lock(&port->port_lock);
2714         netif_tx_disable(dev);
2715
2716         port_napi_disable(port);
2717
2718         ehea_down(dev);
2719
2720         ret = ehea_up(dev);
2721         if (ret)
2722                 goto out;
2723
2724         ehea_set_multicast_list(dev);
2725
2726         netif_info(port, timer, dev, "reset successful\n");
2727
2728         port_napi_enable(port);
2729
2730         netif_tx_wake_all_queues(dev);
2731 out:
2732         mutex_unlock(&port->port_lock);
2733         mutex_unlock(&dlpar_mem_lock);
2734 }
2735
2736 static void ehea_rereg_mrs(void)
2737 {
2738         int ret, i;
2739         struct ehea_adapter *adapter;
2740
2741         pr_info("LPAR memory changed - re-initializing driver\n");
2742
2743         list_for_each_entry(adapter, &adapter_list, list)
2744                 if (adapter->active_ports) {
2745                         /* Shutdown all ports */
2746                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2747                                 struct ehea_port *port = adapter->port[i];
2748                                 struct net_device *dev;
2749
2750                                 if (!port)
2751                                         continue;
2752
2753                                 dev = port->netdev;
2754
2755                                 if (dev->flags & IFF_UP) {
2756                                         mutex_lock(&port->port_lock);
2757                                         netif_tx_disable(dev);
2758                                         ehea_flush_sq(port);
2759                                         ret = ehea_stop_qps(dev);
2760                                         if (ret) {
2761                                                 mutex_unlock(&port->port_lock);
2762                                                 goto out;
2763                                         }
2764                                         port_napi_disable(port);
2765                                         mutex_unlock(&port->port_lock);
2766                                 }
2767                                 reset_sq_restart_flag(port);
2768                         }
2769
2770                         /* Unregister old memory region */
2771                         ret = ehea_rem_mr(&adapter->mr);
2772                         if (ret) {
2773                                 pr_err("unregister MR failed - driver inoperable!\n");
2774                                 goto out;
2775                         }
2776                 }
2777
2778         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2779
2780         list_for_each_entry(adapter, &adapter_list, list)
2781                 if (adapter->active_ports) {
2782                         /* Register new memory region */
2783                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2784                         if (ret) {
2785                                 pr_err("register MR failed - driver inoperable!\n");
2786                                 goto out;
2787                         }
2788
2789                         /* Restart all ports */
2790                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2791                                 struct ehea_port *port = adapter->port[i];
2792
2793                                 if (port) {
2794                                         struct net_device *dev = port->netdev;
2795
2796                                         if (dev->flags & IFF_UP) {
2797                                                 mutex_lock(&port->port_lock);
2798                                                 ret = ehea_restart_qps(dev);
2799                                                 if (!ret) {
2800                                                         check_sqs(port);
2801                                                         port_napi_enable(port);
2802                                                         netif_tx_wake_all_queues(dev);
2803                                                 } else {
2804                                                         netdev_err(dev, "Unable to restart QPS\n");
2805                                                 }
2806                                                 mutex_unlock(&port->port_lock);
2807                                         }
2808                                 }
2809                         }
2810                 }
2811         pr_info("re-initializing driver complete\n");
2812 out:
2813         return;
2814 }
2815
2816 static void ehea_tx_watchdog(struct net_device *dev)
2817 {
2818         struct ehea_port *port = netdev_priv(dev);
2819
2820         if (netif_carrier_ok(dev) &&
2821             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2822                 ehea_schedule_port_reset(port);
2823 }
2824
2825 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2826 {
2827         struct hcp_query_ehea *cb;
2828         u64 hret;
2829         int ret;
2830
2831         cb = (void *)get_zeroed_page(GFP_KERNEL);
2832         if (!cb) {
2833                 ret = -ENOMEM;
2834                 goto out;
2835         }
2836
2837         hret = ehea_h_query_ehea(adapter->handle, cb);
2838
2839         if (hret != H_SUCCESS) {
2840                 ret = -EIO;
2841                 goto out_herr;
2842         }
2843
2844         adapter->max_mc_mac = cb->max_mc_mac - 1;
2845         ret = 0;
2846
2847 out_herr:
2848         free_page((unsigned long)cb);
2849 out:
2850         return ret;
2851 }
2852
2853 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2854 {
2855         struct hcp_ehea_port_cb4 *cb4;
2856         u64 hret;
2857         int ret = 0;
2858
2859         *jumbo = 0;
2860
2861         /* (Try to) enable *jumbo frames */
2862         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2863         if (!cb4) {
2864                 pr_err("no mem for cb4\n");
2865                 ret = -ENOMEM;
2866                 goto out;
2867         } else {
2868                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2869                                               port->logical_port_id,
2870                                               H_PORT_CB4,
2871                                               H_PORT_CB4_JUMBO, cb4);
2872                 if (hret == H_SUCCESS) {
2873                         if (cb4->jumbo_frame)
2874                                 *jumbo = 1;
2875                         else {
2876                                 cb4->jumbo_frame = 1;
2877                                 hret = ehea_h_modify_ehea_port(port->adapter->
2878                                                                handle,
2879                                                                port->
2880                                                                logical_port_id,
2881                                                                H_PORT_CB4,
2882                                                                H_PORT_CB4_JUMBO,
2883                                                                cb4);
2884                                 if (hret == H_SUCCESS)
2885                                         *jumbo = 1;
2886                         }
2887                 } else
2888                         ret = -EINVAL;
2889
2890                 free_page((unsigned long)cb4);
2891         }
2892 out:
2893         return ret;
2894 }
2895
2896 static ssize_t ehea_show_port_id(struct device *dev,
2897                                  struct device_attribute *attr, char *buf)
2898 {
2899         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2900         return sprintf(buf, "%d", port->logical_port_id);
2901 }
2902
2903 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2904                    NULL);
2905
2906 static void logical_port_release(struct device *dev)
2907 {
2908         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2909         of_node_put(port->ofdev.dev.of_node);
2910 }
2911
2912 static struct device *ehea_register_port(struct ehea_port *port,
2913                                          struct device_node *dn)
2914 {
2915         int ret;
2916
2917         port->ofdev.dev.of_node = of_node_get(dn);
2918         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2919         port->ofdev.dev.bus = &ibmebus_bus_type;
2920
2921         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2922         port->ofdev.dev.release = logical_port_release;
2923
2924         ret = of_device_register(&port->ofdev);
2925         if (ret) {
2926                 pr_err("failed to register device. ret=%d\n", ret);
2927                 goto out;
2928         }
2929
2930         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2931         if (ret) {
2932                 pr_err("failed to register attributes, ret=%d\n", ret);
2933                 goto out_unreg_of_dev;
2934         }
2935
2936         return &port->ofdev.dev;
2937
2938 out_unreg_of_dev:
2939         of_device_unregister(&port->ofdev);
2940 out:
2941         return NULL;
2942 }
2943
2944 static void ehea_unregister_port(struct ehea_port *port)
2945 {
2946         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2947         of_device_unregister(&port->ofdev);
2948 }
2949
2950 static const struct net_device_ops ehea_netdev_ops = {
2951         .ndo_open               = ehea_open,
2952         .ndo_stop               = ehea_stop,
2953         .ndo_start_xmit         = ehea_start_xmit,
2954 #ifdef CONFIG_NET_POLL_CONTROLLER
2955         .ndo_poll_controller    = ehea_netpoll,
2956 #endif
2957         .ndo_get_stats64        = ehea_get_stats64,
2958         .ndo_set_mac_address    = ehea_set_mac_addr,
2959         .ndo_validate_addr      = eth_validate_addr,
2960         .ndo_set_rx_mode        = ehea_set_multicast_list,
2961         .ndo_change_mtu         = ehea_change_mtu,
2962         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2963         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2964         .ndo_tx_timeout         = ehea_tx_watchdog,
2965 };
2966
2967 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2968                                          u32 logical_port_id,
2969                                          struct device_node *dn)
2970 {
2971         int ret;
2972         struct net_device *dev;
2973         struct ehea_port *port;
2974         struct device *port_dev;
2975         int jumbo;
2976
2977         /* allocate memory for the port structures */
2978         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2979
2980         if (!dev) {
2981                 ret = -ENOMEM;
2982                 goto out_err;
2983         }
2984
2985         port = netdev_priv(dev);
2986
2987         mutex_init(&port->port_lock);
2988         port->state = EHEA_PORT_DOWN;
2989         port->sig_comp_iv = sq_entries / 10;
2990
2991         port->adapter = adapter;
2992         port->netdev = dev;
2993         port->logical_port_id = logical_port_id;
2994
2995         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2996
2997         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2998         if (!port->mc_list) {
2999                 ret = -ENOMEM;
3000                 goto out_free_ethdev;
3001         }
3002
3003         INIT_LIST_HEAD(&port->mc_list->list);
3004
3005         ret = ehea_sense_port_attr(port);
3006         if (ret)
3007                 goto out_free_mc_list;
3008
3009         netif_set_real_num_rx_queues(dev, port->num_def_qps);
3010         netif_set_real_num_tx_queues(dev, port->num_def_qps);
3011
3012         port_dev = ehea_register_port(port, dn);
3013         if (!port_dev)
3014                 goto out_free_mc_list;
3015
3016         SET_NETDEV_DEV(dev, port_dev);
3017
3018         /* initialize net_device structure */
3019         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3020
3021         dev->netdev_ops = &ehea_netdev_ops;
3022         ehea_set_ethtool_ops(dev);
3023
3024         dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
3025                       NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3026         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO |
3027                       NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3028                       NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3029                       NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3030         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3031                         NETIF_F_IP_CSUM;
3032         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3033
3034         INIT_WORK(&port->reset_task, ehea_reset_port);
3035         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3036
3037         init_waitqueue_head(&port->swqe_avail_wq);
3038         init_waitqueue_head(&port->restart_wq);
3039
3040         memset(&port->stats, 0, sizeof(struct net_device_stats));
3041         ret = register_netdev(dev);
3042         if (ret) {
3043                 pr_err("register_netdev failed. ret=%d\n", ret);
3044                 goto out_unreg_port;
3045         }
3046
3047         ret = ehea_get_jumboframe_status(port, &jumbo);
3048         if (ret)
3049                 netdev_err(dev, "failed determining jumbo frame status\n");
3050
3051         netdev_info(dev, "Jumbo frames are %sabled\n",
3052                     jumbo == 1 ? "en" : "dis");
3053
3054         adapter->active_ports++;
3055
3056         return port;
3057
3058 out_unreg_port:
3059         ehea_unregister_port(port);
3060
3061 out_free_mc_list:
3062         kfree(port->mc_list);
3063
3064 out_free_ethdev:
3065         free_netdev(dev);
3066
3067 out_err:
3068         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3069                logical_port_id, ret);
3070         return NULL;
3071 }
3072
3073 static void ehea_shutdown_single_port(struct ehea_port *port)
3074 {
3075         struct ehea_adapter *adapter = port->adapter;
3076
3077         cancel_work_sync(&port->reset_task);
3078         cancel_delayed_work_sync(&port->stats_work);
3079         unregister_netdev(port->netdev);
3080         ehea_unregister_port(port);
3081         kfree(port->mc_list);
3082         free_netdev(port->netdev);
3083         adapter->active_ports--;
3084 }
3085
3086 static int ehea_setup_ports(struct ehea_adapter *adapter)
3087 {
3088         struct device_node *lhea_dn;
3089         struct device_node *eth_dn = NULL;
3090
3091         const u32 *dn_log_port_id;
3092         int i = 0;
3093
3094         lhea_dn = adapter->ofdev->dev.of_node;
3095         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3096
3097                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3098                                                  NULL);
3099                 if (!dn_log_port_id) {
3100                         pr_err("bad device node: eth_dn name=%s\n",
3101                                eth_dn->full_name);
3102                         continue;
3103                 }
3104
3105                 if (ehea_add_adapter_mr(adapter)) {
3106                         pr_err("creating MR failed\n");
3107                         of_node_put(eth_dn);
3108                         return -EIO;
3109                 }
3110
3111                 adapter->port[i] = ehea_setup_single_port(adapter,
3112                                                           *dn_log_port_id,
3113                                                           eth_dn);
3114                 if (adapter->port[i])
3115                         netdev_info(adapter->port[i]->netdev,
3116                                     "logical port id #%d\n", *dn_log_port_id);
3117                 else
3118                         ehea_remove_adapter_mr(adapter);
3119
3120                 i++;
3121         }
3122         return 0;
3123 }
3124
3125 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3126                                            u32 logical_port_id)
3127 {
3128         struct device_node *lhea_dn;
3129         struct device_node *eth_dn = NULL;
3130         const u32 *dn_log_port_id;
3131
3132         lhea_dn = adapter->ofdev->dev.of_node;
3133         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3134
3135                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3136                                                  NULL);
3137                 if (dn_log_port_id)
3138                         if (*dn_log_port_id == logical_port_id)
3139                                 return eth_dn;
3140         }
3141
3142         return NULL;
3143 }
3144
3145 static ssize_t ehea_probe_port(struct device *dev,
3146                                struct device_attribute *attr,
3147                                const char *buf, size_t count)
3148 {
3149         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3150         struct ehea_port *port;
3151         struct device_node *eth_dn = NULL;
3152         int i;
3153
3154         u32 logical_port_id;
3155
3156         sscanf(buf, "%d", &logical_port_id);
3157
3158         port = ehea_get_port(adapter, logical_port_id);
3159
3160         if (port) {
3161                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3162                             logical_port_id);
3163                 return -EINVAL;
3164         }
3165
3166         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3167
3168         if (!eth_dn) {
3169                 pr_info("no logical port with id %d found\n", logical_port_id);
3170                 return -EINVAL;
3171         }
3172
3173         if (ehea_add_adapter_mr(adapter)) {
3174                 pr_err("creating MR failed\n");
3175                 return -EIO;
3176         }
3177
3178         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3179
3180         of_node_put(eth_dn);
3181
3182         if (port) {
3183                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3184                         if (!adapter->port[i]) {
3185                                 adapter->port[i] = port;
3186                                 break;
3187                         }
3188
3189                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3190                             logical_port_id);
3191         } else {
3192                 ehea_remove_adapter_mr(adapter);
3193                 return -EIO;
3194         }
3195
3196         return (ssize_t) count;
3197 }
3198
3199 static ssize_t ehea_remove_port(struct device *dev,
3200                                 struct device_attribute *attr,
3201                                 const char *buf, size_t count)
3202 {
3203         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3204         struct ehea_port *port;
3205         int i;
3206         u32 logical_port_id;
3207
3208         sscanf(buf, "%d", &logical_port_id);
3209
3210         port = ehea_get_port(adapter, logical_port_id);
3211
3212         if (port) {
3213                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3214                             logical_port_id);
3215
3216                 ehea_shutdown_single_port(port);
3217
3218                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3219                         if (adapter->port[i] == port) {
3220                                 adapter->port[i] = NULL;
3221                                 break;
3222                         }
3223         } else {
3224                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3225                        logical_port_id);
3226                 return -EINVAL;
3227         }
3228
3229         ehea_remove_adapter_mr(adapter);
3230
3231         return (ssize_t) count;
3232 }
3233
3234 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3235 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3236
3237 static int ehea_create_device_sysfs(struct platform_device *dev)
3238 {
3239         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3240         if (ret)
3241                 goto out;
3242
3243         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3244 out:
3245         return ret;
3246 }
3247
3248 static void ehea_remove_device_sysfs(struct platform_device *dev)
3249 {
3250         device_remove_file(&dev->dev, &dev_attr_probe_port);
3251         device_remove_file(&dev->dev, &dev_attr_remove_port);
3252 }
3253
3254 static int ehea_probe_adapter(struct platform_device *dev,
3255                               const struct of_device_id *id)
3256 {
3257         struct ehea_adapter *adapter;
3258         const u64 *adapter_handle;
3259         int ret;
3260         int i;
3261
3262         if (!dev || !dev->dev.of_node) {
3263                 pr_err("Invalid ibmebus device probed\n");
3264                 return -EINVAL;
3265         }
3266
3267         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3268         if (!adapter) {
3269                 ret = -ENOMEM;
3270                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3271                 goto out;
3272         }
3273
3274         list_add(&adapter->list, &adapter_list);
3275
3276         adapter->ofdev = dev;
3277
3278         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3279                                          NULL);
3280         if (adapter_handle)
3281                 adapter->handle = *adapter_handle;
3282
3283         if (!adapter->handle) {
3284                 dev_err(&dev->dev, "failed getting handle for adapter"
3285                         " '%s'\n", dev->dev.of_node->full_name);
3286                 ret = -ENODEV;
3287                 goto out_free_ad;
3288         }
3289
3290         adapter->pd = EHEA_PD_ID;
3291
3292         dev_set_drvdata(&dev->dev, adapter);
3293
3294
3295         /* initialize adapter and ports */
3296         /* get adapter properties */
3297         ret = ehea_sense_adapter_attr(adapter);
3298         if (ret) {
3299                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3300                 goto out_free_ad;
3301         }
3302
3303         adapter->neq = ehea_create_eq(adapter,
3304                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3305         if (!adapter->neq) {
3306                 ret = -EIO;
3307                 dev_err(&dev->dev, "NEQ creation failed\n");
3308                 goto out_free_ad;
3309         }
3310
3311         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3312                      (unsigned long)adapter);
3313
3314         ret = ehea_create_device_sysfs(dev);
3315         if (ret)
3316                 goto out_kill_eq;
3317
3318         ret = ehea_setup_ports(adapter);
3319         if (ret) {
3320                 dev_err(&dev->dev, "setup_ports failed\n");
3321                 goto out_rem_dev_sysfs;
3322         }
3323
3324         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3325                                   ehea_interrupt_neq, IRQF_DISABLED,
3326                                   "ehea_neq", adapter);
3327         if (ret) {
3328                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3329                 goto out_shutdown_ports;
3330         }
3331
3332         /* Handle any events that might be pending. */
3333         tasklet_hi_schedule(&adapter->neq_tasklet);
3334
3335         ret = 0;
3336         goto out;
3337
3338 out_shutdown_ports:
3339         for (i = 0; i < EHEA_MAX_PORTS; i++)
3340                 if (adapter->port[i]) {
3341                         ehea_shutdown_single_port(adapter->port[i]);
3342                         adapter->port[i] = NULL;
3343                 }
3344
3345 out_rem_dev_sysfs:
3346         ehea_remove_device_sysfs(dev);
3347
3348 out_kill_eq:
3349         ehea_destroy_eq(adapter->neq);
3350
3351 out_free_ad:
3352         list_del(&adapter->list);
3353         kfree(adapter);
3354
3355 out:
3356         ehea_update_firmware_handles();
3357
3358         return ret;
3359 }
3360
3361 static int ehea_remove(struct platform_device *dev)
3362 {
3363         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3364         int i;
3365
3366         for (i = 0; i < EHEA_MAX_PORTS; i++)
3367                 if (adapter->port[i]) {
3368                         ehea_shutdown_single_port(adapter->port[i]);
3369                         adapter->port[i] = NULL;
3370                 }
3371
3372         ehea_remove_device_sysfs(dev);
3373
3374         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3375         tasklet_kill(&adapter->neq_tasklet);
3376
3377         ehea_destroy_eq(adapter->neq);
3378         ehea_remove_adapter_mr(adapter);
3379         list_del(&adapter->list);
3380         kfree(adapter);
3381
3382         ehea_update_firmware_handles();
3383
3384         return 0;
3385 }
3386
3387 static void ehea_crash_handler(void)
3388 {
3389         int i;
3390
3391         if (ehea_fw_handles.arr)
3392                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3393                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3394                                              ehea_fw_handles.arr[i].fwh,
3395                                              FORCE_FREE);
3396
3397         if (ehea_bcmc_regs.arr)
3398                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3399                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3400                                               ehea_bcmc_regs.arr[i].port_id,
3401                                               ehea_bcmc_regs.arr[i].reg_type,
3402                                               ehea_bcmc_regs.arr[i].macaddr,
3403                                               0, H_DEREG_BCMC);
3404 }
3405
3406 static int ehea_mem_notifier(struct notifier_block *nb,
3407                              unsigned long action, void *data)
3408 {
3409         int ret = NOTIFY_BAD;
3410         struct memory_notify *arg = data;
3411
3412         mutex_lock(&dlpar_mem_lock);
3413
3414         switch (action) {
3415         case MEM_CANCEL_OFFLINE:
3416                 pr_info("memory offlining canceled");
3417                 /* Readd canceled memory block */
3418         case MEM_ONLINE:
3419                 pr_info("memory is going online");
3420                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3421                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3422                         goto out_unlock;
3423                 ehea_rereg_mrs();
3424                 break;
3425         case MEM_GOING_OFFLINE:
3426                 pr_info("memory is going offline");
3427                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3428                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3429                         goto out_unlock;
3430                 ehea_rereg_mrs();
3431                 break;
3432         default:
3433                 break;
3434         }
3435
3436         ehea_update_firmware_handles();
3437         ret = NOTIFY_OK;
3438
3439 out_unlock:
3440         mutex_unlock(&dlpar_mem_lock);
3441         return ret;
3442 }
3443
3444 static struct notifier_block ehea_mem_nb = {
3445         .notifier_call = ehea_mem_notifier,
3446 };
3447
3448 static int ehea_reboot_notifier(struct notifier_block *nb,
3449                                 unsigned long action, void *unused)
3450 {
3451         if (action == SYS_RESTART) {
3452                 pr_info("Reboot: freeing all eHEA resources\n");
3453                 ibmebus_unregister_driver(&ehea_driver);
3454         }
3455         return NOTIFY_DONE;
3456 }
3457
3458 static struct notifier_block ehea_reboot_nb = {
3459         .notifier_call = ehea_reboot_notifier,
3460 };
3461
3462 static int check_module_parm(void)
3463 {
3464         int ret = 0;
3465
3466         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3467             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3468                 pr_info("Bad parameter: rq1_entries\n");
3469                 ret = -EINVAL;
3470         }
3471         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3472             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3473                 pr_info("Bad parameter: rq2_entries\n");
3474                 ret = -EINVAL;
3475         }
3476         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3477             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3478                 pr_info("Bad parameter: rq3_entries\n");
3479                 ret = -EINVAL;
3480         }
3481         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3482             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3483                 pr_info("Bad parameter: sq_entries\n");
3484                 ret = -EINVAL;
3485         }
3486
3487         return ret;
3488 }
3489
3490 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3491                                       char *buf)
3492 {
3493         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3494 }
3495
3496 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3497                    ehea_show_capabilities, NULL);
3498
3499 static int __init ehea_module_init(void)
3500 {
3501         int ret;
3502
3503         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3504
3505         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3506         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3507
3508         mutex_init(&ehea_fw_handles.lock);
3509         spin_lock_init(&ehea_bcmc_regs.lock);
3510
3511         ret = check_module_parm();
3512         if (ret)
3513                 goto out;
3514
3515         ret = ehea_create_busmap();
3516         if (ret)
3517                 goto out;
3518
3519         ret = register_reboot_notifier(&ehea_reboot_nb);
3520         if (ret)
3521                 pr_info("failed registering reboot notifier\n");
3522
3523         ret = register_memory_notifier(&ehea_mem_nb);
3524         if (ret)
3525                 pr_info("failed registering memory remove notifier\n");
3526
3527         ret = crash_shutdown_register(ehea_crash_handler);
3528         if (ret)
3529                 pr_info("failed registering crash handler\n");
3530
3531         ret = ibmebus_register_driver(&ehea_driver);
3532         if (ret) {
3533                 pr_err("failed registering eHEA device driver on ebus\n");
3534                 goto out2;
3535         }
3536
3537         ret = driver_create_file(&ehea_driver.driver,
3538                                  &driver_attr_capabilities);
3539         if (ret) {
3540                 pr_err("failed to register capabilities attribute, ret=%d\n",
3541                        ret);
3542                 goto out3;
3543         }
3544
3545         return ret;
3546
3547 out3:
3548         ibmebus_unregister_driver(&ehea_driver);
3549 out2:
3550         unregister_memory_notifier(&ehea_mem_nb);
3551         unregister_reboot_notifier(&ehea_reboot_nb);
3552         crash_shutdown_unregister(ehea_crash_handler);
3553 out:
3554         return ret;
3555 }
3556
3557 static void __exit ehea_module_exit(void)
3558 {
3559         int ret;
3560
3561         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3562         ibmebus_unregister_driver(&ehea_driver);
3563         unregister_reboot_notifier(&ehea_reboot_nb);
3564         ret = crash_shutdown_unregister(ehea_crash_handler);
3565         if (ret)
3566                 pr_info("failed unregistering crash handler\n");
3567         unregister_memory_notifier(&ehea_mem_nb);
3568         kfree(ehea_fw_handles.arr);
3569         kfree(ehea_bcmc_regs.arr);
3570         ehea_destroy_busmap();
3571 }
3572
3573 module_init(ehea_module_init);
3574 module_exit(ehea_module_exit);