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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  linux/drivers/net/ethernet/ibm/ehea/ehea_main.c
   4  *
   5  *  eHEA ethernet device driver for IBM eServer System p
   6  *
   7  *  (C) Copyright IBM Corp. 2006
   8  *
   9  *  Authors:
  10  *       Christoph Raisch <raisch@de.ibm.com>
  11  *       Jan-Bernd Themann <themann@de.ibm.com>
  12  *       Thomas Klein <tklein@de.ibm.com>
  13  */
  14
  15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  16
  17 #include <linux/device.h>
  18 #include <linux/in.h>
  19 #include <linux/ip.h>
  20 #include <linux/tcp.h>
  21 #include <linux/udp.h>
  22 #include <linux/if.h>
  23 #include <linux/list.h>
  24 #include <linux/slab.h>
  25 #include <linux/if_ether.h>
  26 #include <linux/notifier.h>
  27 #include <linux/reboot.h>
  28 #include <linux/memory.h>
  29 #include <asm/kexec.h>
  30 #include <linux/mutex.h>
  31 #include <linux/prefetch.h>
  32 #include <linux/of.h>
  33 #include <linux/of_device.h>
  34
  35 #include <net/ip.h>
  36
  37 #include "ehea.h"
  38 #include "ehea_qmr.h"
  39 #include "ehea_phyp.h"
  40
  41
  42 MODULE_LICENSE("GPL");
  43 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  44 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  45 MODULE_VERSION(DRV_VERSION);
  46
  47
  48 static int msg_level = -1;
  49 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  50 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  51 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  52 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  53 static int use_mcs = 1;
  54 static int prop_carrier_state;
  55
  56 module_param(msg_level, int, 0);
  57 module_param(rq1_entries, int, 0);
  58 module_param(rq2_entries, int, 0);
  59 module_param(rq3_entries, int, 0);
  60 module_param(sq_entries, int, 0);
  61 module_param(prop_carrier_state, int, 0);
  62 module_param(use_mcs, int, 0);
  63
  64 MODULE_PARM_DESC(msg_level, "msg_level");
  65 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  66                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  67 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  68                  "[2^x - 1], x = [7..14]. Default = "
  69                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  70 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  71                  "[2^x - 1], x = [7..14]. Default = "
  72                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  73 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  74                  "[2^x - 1], x = [7..14]. Default = "
  75                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  76 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  77                  "[2^x - 1], x = [7..14]. Default = "
  78                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  79 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  80                  "Default = 1");
  81
  82 static int port_name_cnt;
  83 static LIST_HEAD(adapter_list);
  84 static unsigned long ehea_driver_flags;
  85 static DEFINE_MUTEX(dlpar_mem_lock);
  86 static struct ehea_fw_handle_array ehea_fw_handles;
  87 static struct ehea_bcmc_reg_array ehea_bcmc_regs;
  88
  89
  90 static int ehea_probe_adapter(struct platform_device *dev);
  91
  92 static int ehea_remove(struct platform_device *dev);
  93
  94 static const struct of_device_id ehea_module_device_table[] = {
  95         {
  96                 .name = "lhea",
  97                 .compatible = "IBM,lhea",
  98         },
  99         {
 100                 .type = "network",
 101                 .compatible = "IBM,lhea-ethernet",
 102         },
 103         {},
 104 };
 105 MODULE_DEVICE_TABLE(of, ehea_module_device_table);
 106
 107 static const struct of_device_id ehea_device_table[] = {
 108         {
 109                 .name = "lhea",
 110                 .compatible = "IBM,lhea",
 111         },
 112         {},
 113 };
 114 MODULE_DEVICE_TABLE(of, ehea_device_table);
 115
 116 static struct platform_driver ehea_driver = {
 117         .driver = {
 118                 .name = "ehea",
 119                 .owner = THIS_MODULE,
 120                 .of_match_table = ehea_device_table,
 121         },
 122         .probe = ehea_probe_adapter,
 123         .remove = ehea_remove,
 124 };
 125
 126 void ehea_dump(void *adr, int len, char *msg)
 127 {
 128         int x;
 129         unsigned char *deb = adr;
 130         for (x = 0; x < len; x += 16) {
 131                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 132                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 133                 deb += 16;
 134         }
 135 }
 136
 137 static void ehea_schedule_port_reset(struct ehea_port *port)
 138 {
 139         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 140                 schedule_work(&port->reset_task);
 141 }
 142
 143 static void ehea_update_firmware_handles(void)
 144 {
 145         struct ehea_fw_handle_entry *arr = NULL;
 146         struct ehea_adapter *adapter;
 147         int num_adapters = 0;
 148         int num_ports = 0;
 149         int num_portres = 0;
 150         int i = 0;
 151         int num_fw_handles, k, l;
 152
 153         /* Determine number of handles */
 154         mutex_lock(&ehea_fw_handles.lock);
 155
 156         list_for_each_entry(adapter, &adapter_list, list) {
 157                 num_adapters++;
 158
 159                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 160                         struct ehea_port *port = adapter->port[k];
 161
 162                         if (!port || (port->state != EHEA_PORT_UP))
 163                                 continue;
 164
 165                         num_ports++;
 166                         num_portres += port->num_def_qps;
 167                 }
 168         }
 169
 170         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 171                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 172                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 173
 174         if (num_fw_handles) {
 175                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 176                 if (!arr)
 177                         goto out;  /* Keep the existing array */
 178         } else
 179                 goto out_update;
 180
 181         list_for_each_entry(adapter, &adapter_list, list) {
 182                 if (num_adapters == 0)
 183                         break;
 184
 185                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 186                         struct ehea_port *port = adapter->port[k];
 187
 188                         if (!port || (port->state != EHEA_PORT_UP) ||
 189                             (num_ports == 0))
 190                                 continue;
 191
 192                         for (l = 0; l < port->num_def_qps; l++) {
 193                                 struct ehea_port_res *pr = &port->port_res[l];
 194
 195                                 arr[i].adh = adapter->handle;
 196                                 arr[i++].fwh = pr->qp->fw_handle;
 197                                 arr[i].adh = adapter->handle;
 198                                 arr[i++].fwh = pr->send_cq->fw_handle;
 199                                 arr[i].adh = adapter->handle;
 200                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 201                                 arr[i].adh = adapter->handle;
 202                                 arr[i++].fwh = pr->eq->fw_handle;
 203                                 arr[i].adh = adapter->handle;
 204                                 arr[i++].fwh = pr->send_mr.handle;
 205                                 arr[i].adh = adapter->handle;
 206                                 arr[i++].fwh = pr->recv_mr.handle;
 207                         }
 208                         arr[i].adh = adapter->handle;
 209                         arr[i++].fwh = port->qp_eq->fw_handle;
 210                         num_ports--;
 211                 }
 212
 213                 arr[i].adh = adapter->handle;
 214                 arr[i++].fwh = adapter->neq->fw_handle;
 215
 216                 if (adapter->mr.handle) {
 217                         arr[i].adh = adapter->handle;
 218                         arr[i++].fwh = adapter->mr.handle;
 219                 }
 220                 num_adapters--;
 221         }
 222
 223 out_update:
 224         kfree(ehea_fw_handles.arr);
 225         ehea_fw_handles.arr = arr;
 226         ehea_fw_handles.num_entries = i;
 227 out:
 228         mutex_unlock(&ehea_fw_handles.lock);
 229 }
 230
 231 static void ehea_update_bcmc_registrations(void)
 232 {
 233         unsigned long flags;
 234         struct ehea_bcmc_reg_entry *arr = NULL;
 235         struct ehea_adapter *adapter;
 236         struct ehea_mc_list *mc_entry;
 237         int num_registrations = 0;
 238         int i = 0;
 239         int k;
 240
 241         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 242
 243         /* Determine number of registrations */
 244         list_for_each_entry(adapter, &adapter_list, list)
 245                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 246                         struct ehea_port *port = adapter->port[k];
 247
 248                         if (!port || (port->state != EHEA_PORT_UP))
 249                                 continue;
 250
 251                         num_registrations += 2; /* Broadcast registrations */
 252
 253                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 254                                 num_registrations += 2;
 255                 }
 256
 257         if (num_registrations) {
 258                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 259                 if (!arr)
 260                         goto out;  /* Keep the existing array */
 261         } else
 262                 goto out_update;
 263
 264         list_for_each_entry(adapter, &adapter_list, list) {
 265                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 266                         struct ehea_port *port = adapter->port[k];
 267
 268                         if (!port || (port->state != EHEA_PORT_UP))
 269                                 continue;
 270
 271                         if (num_registrations == 0)
 272                                 goto out_update;
 273
 274                         arr[i].adh = adapter->handle;
 275                         arr[i].port_id = port->logical_port_id;
 276                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 277                                           EHEA_BCMC_UNTAGGED;
 278                         arr[i++].macaddr = port->mac_addr;
 279
 280                         arr[i].adh = adapter->handle;
 281                         arr[i].port_id = port->logical_port_id;
 282                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 283                                           EHEA_BCMC_VLANID_ALL;
 284                         arr[i++].macaddr = port->mac_addr;
 285                         num_registrations -= 2;
 286
 287                         list_for_each_entry(mc_entry,
 288                                             &port->mc_list->list, list) {
 289                                 if (num_registrations == 0)
 290                                         goto out_update;
 291
 292                                 arr[i].adh = adapter->handle;
 293                                 arr[i].port_id = port->logical_port_id;
 294                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 295                                                   EHEA_BCMC_UNTAGGED;
 296                                 if (mc_entry->macaddr == 0)
 297                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 298                                 arr[i++].macaddr = mc_entry->macaddr;
 299
 300                                 arr[i].adh = adapter->handle;
 301                                 arr[i].port_id = port->logical_port_id;
 302                                 arr[i].reg_type = EHEA_BCMC_MULTICAST |
 303                                                   EHEA_BCMC_VLANID_ALL;
 304                                 if (mc_entry->macaddr == 0)
 305                                         arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 306                                 arr[i++].macaddr = mc_entry->macaddr;
 307                                 num_registrations -= 2;
 308                         }
 309                 }
 310         }
 311
 312 out_update:
 313         kfree(ehea_bcmc_regs.arr);
 314         ehea_bcmc_regs.arr = arr;
 315         ehea_bcmc_regs.num_entries = i;
 316 out:
 317         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 318 }
 319
 320 static void ehea_get_stats64(struct net_device *dev,
 321                              struct rtnl_link_stats64 *stats)
 322 {
 323         struct ehea_port *port = netdev_priv(dev);
 324         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 325         int i;
 326
 327         for (i = 0; i < port->num_def_qps; i++) {
 328                 rx_packets += port->port_res[i].rx_packets;
 329                 rx_bytes   += port->port_res[i].rx_bytes;
 330         }
 331
 332         for (i = 0; i < port->num_def_qps; i++) {
 333                 tx_packets += port->port_res[i].tx_packets;
 334                 tx_bytes   += port->port_res[i].tx_bytes;
 335         }
 336
 337         stats->tx_packets = tx_packets;
 338         stats->rx_bytes = rx_bytes;
 339         stats->tx_bytes = tx_bytes;
 340         stats->rx_packets = rx_packets;
 341
 342         stats->multicast = port->stats.multicast;
 343         stats->rx_errors = port->stats.rx_errors;
 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_consume_skb_any(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;
 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                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 776                 memset(swqe, 0, SWQE_HEADER_SIZE);
 777                 atomic_dec(&pr->swqe_avail);
 778
 779                 swqe->tx_control |= EHEA_SWQE_PURGE;
 780                 swqe->wr_id = SWQE_RESTART_CHECK;
 781                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 782                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 783                 swqe->immediate_data_length = 80;
 784
 785                 ehea_post_swqe(pr->qp, swqe);
 786
 787                 ret = wait_event_timeout(port->restart_wq,
 788                                          pr->sq_restart_flag == 0,
 789                                          msecs_to_jiffies(100));
 790
 791                 if (!ret) {
 792                         pr_err("HW/SW queues out of sync\n");
 793                         ehea_schedule_port_reset(pr->port);
 794                         return;
 795                 }
 796         }
 797 }
 798
 799
 800 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 801 {
 802         struct sk_buff *skb;
 803         struct ehea_cq *send_cq = pr->send_cq;
 804         struct ehea_cqe *cqe;
 805         int quota = my_quota;
 806         int cqe_counter = 0;
 807         int swqe_av = 0;
 808         int index;
 809         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 810                                                 pr - &pr->port->port_res[0]);
 811
 812         cqe = ehea_poll_cq(send_cq);
 813         while (cqe && (quota > 0)) {
 814                 ehea_inc_cq(send_cq);
 815
 816                 cqe_counter++;
 817                 rmb();
 818
 819                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 820                         pr->sq_restart_flag = 1;
 821                         swqe_av++;
 822                         break;
 823                 }
 824
 825                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 826                         pr_err("Bad send completion status=0x%04X\n",
 827                                cqe->status);
 828
 829                         if (netif_msg_tx_err(pr->port))
 830                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 831
 832                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 833                                 pr_err("Resetting port\n");
 834                                 ehea_schedule_port_reset(pr->port);
 835                                 break;
 836                         }
 837                 }
 838
 839                 if (netif_msg_tx_done(pr->port))
 840                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 841
 842                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 843                            == EHEA_SWQE2_TYPE)) {
 844
 845                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 846                         skb = pr->sq_skba.arr[index];
 847                         dev_consume_skb_any(skb);
 848                         pr->sq_skba.arr[index] = NULL;
 849                 }
 850
 851                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 852                 quota--;
 853
 854                 cqe = ehea_poll_cq(send_cq);
 855         }
 856
 857         ehea_update_feca(send_cq, cqe_counter);
 858         atomic_add(swqe_av, &pr->swqe_avail);
 859
 860         if (unlikely(netif_tx_queue_stopped(txq) &&
 861                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 862                 __netif_tx_lock(txq, smp_processor_id());
 863                 if (netif_tx_queue_stopped(txq) &&
 864                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 865                         netif_tx_wake_queue(txq);
 866                 __netif_tx_unlock(txq);
 867         }
 868
 869         wake_up(&pr->port->swqe_avail_wq);
 870
 871         return cqe;
 872 }
 873
 874 #define EHEA_POLL_MAX_CQES 65535
 875
 876 static int ehea_poll(struct napi_struct *napi, int budget)
 877 {
 878         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 879                                                 napi);
 880         struct net_device *dev = pr->port->netdev;
 881         struct ehea_cqe *cqe;
 882         struct ehea_cqe *cqe_skb = NULL;
 883         int wqe_index;
 884         int rx = 0;
 885
 886         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 887         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 888
 889         while (rx != budget) {
 890                 napi_complete(napi);
 891                 ehea_reset_cq_ep(pr->recv_cq);
 892                 ehea_reset_cq_ep(pr->send_cq);
 893                 ehea_reset_cq_n1(pr->recv_cq);
 894                 ehea_reset_cq_n1(pr->send_cq);
 895                 rmb();
 896                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 897                 cqe_skb = ehea_poll_cq(pr->send_cq);
 898
 899                 if (!cqe && !cqe_skb)
 900                         return rx;
 901
 902                 if (!napi_reschedule(napi))
 903                         return rx;
 904
 905                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 906                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 907         }
 908
 909         return rx;
 910 }
 911
 912 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 913 {
 914         struct ehea_port_res *pr = param;
 915
 916         napi_schedule(&pr->napi);
 917
 918         return IRQ_HANDLED;
 919 }
 920
 921 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 922 {
 923         struct ehea_port *port = param;
 924         struct ehea_eqe *eqe;
 925         struct ehea_qp *qp;
 926         u32 qp_token;
 927         u64 resource_type, aer, aerr;
 928         int reset_port = 0;
 929
 930         eqe = ehea_poll_eq(port->qp_eq);
 931
 932         while (eqe) {
 933                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 934                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 935                        eqe->entry, qp_token);
 936
 937                 qp = port->port_res[qp_token].qp;
 938
 939                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 940                                                 &aer, &aerr);
 941
 942                 if (resource_type == EHEA_AER_RESTYPE_QP) {
 943                         if ((aer & EHEA_AER_RESET_MASK) ||
 944                             (aerr & EHEA_AERR_RESET_MASK))
 945                                  reset_port = 1;
 946                 } else
 947                         reset_port = 1;   /* Reset in case of CQ or EQ error */
 948
 949                 eqe = ehea_poll_eq(port->qp_eq);
 950         }
 951
 952         if (reset_port) {
 953                 pr_err("Resetting port\n");
 954                 ehea_schedule_port_reset(port);
 955         }
 956
 957         return IRQ_HANDLED;
 958 }
 959
 960 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 961                                        int logical_port)
 962 {
 963         int i;
 964
 965         for (i = 0; i < EHEA_MAX_PORTS; i++)
 966                 if (adapter->port[i])
 967                         if (adapter->port[i]->logical_port_id == logical_port)
 968                                 return adapter->port[i];
 969         return NULL;
 970 }
 971
 972 int ehea_sense_port_attr(struct ehea_port *port)
 973 {
 974         int ret;
 975         u64 hret;
 976         struct hcp_ehea_port_cb0 *cb0;
 977
 978         /* may be called via ehea_neq_tasklet() */
 979         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 980         if (!cb0) {
 981                 pr_err("no mem for cb0\n");
 982                 ret = -ENOMEM;
 983                 goto out;
 984         }
 985
 986         hret = ehea_h_query_ehea_port(port->adapter->handle,
 987                                       port->logical_port_id, H_PORT_CB0,
 988                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 989                                       cb0);
 990         if (hret != H_SUCCESS) {
 991                 ret = -EIO;
 992                 goto out_free;
 993         }
 994
 995         /* MAC address */
 996         port->mac_addr = cb0->port_mac_addr << 16;
 997
 998         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
 999                 ret = -EADDRNOTAVAIL;
1000                 goto out_free;
1001         }
1002
1003         /* Port speed */
1004         switch (cb0->port_speed) {
1005         case H_SPEED_10M_H:
1006                 port->port_speed = EHEA_SPEED_10M;
1007                 port->full_duplex = 0;
1008                 break;
1009         case H_SPEED_10M_F:
1010                 port->port_speed = EHEA_SPEED_10M;
1011                 port->full_duplex = 1;
1012                 break;
1013         case H_SPEED_100M_H:
1014                 port->port_speed = EHEA_SPEED_100M;
1015                 port->full_duplex = 0;
1016                 break;
1017         case H_SPEED_100M_F:
1018                 port->port_speed = EHEA_SPEED_100M;
1019                 port->full_duplex = 1;
1020                 break;
1021         case H_SPEED_1G_F:
1022                 port->port_speed = EHEA_SPEED_1G;
1023                 port->full_duplex = 1;
1024                 break;
1025         case H_SPEED_10G_F:
1026                 port->port_speed = EHEA_SPEED_10G;
1027                 port->full_duplex = 1;
1028                 break;
1029         default:
1030                 port->port_speed = 0;
1031                 port->full_duplex = 0;
1032                 break;
1033         }
1034
1035         port->autoneg = 1;
1036         port->num_mcs = cb0->num_default_qps;
1037
1038         /* Number of default QPs */
1039         if (use_mcs)
1040                 port->num_def_qps = cb0->num_default_qps;
1041         else
1042                 port->num_def_qps = 1;
1043
1044         if (!port->num_def_qps) {
1045                 ret = -EINVAL;
1046                 goto out_free;
1047         }
1048
1049         ret = 0;
1050 out_free:
1051         if (ret || netif_msg_probe(port))
1052                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1053         free_page((unsigned long)cb0);
1054 out:
1055         return ret;
1056 }
1057
1058 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1059 {
1060         struct hcp_ehea_port_cb4 *cb4;
1061         u64 hret;
1062         int ret = 0;
1063
1064         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1065         if (!cb4) {
1066                 pr_err("no mem for cb4\n");
1067                 ret = -ENOMEM;
1068                 goto out;
1069         }
1070
1071         cb4->port_speed = port_speed;
1072
1073         netif_carrier_off(port->netdev);
1074
1075         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1076                                        port->logical_port_id,
1077                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1078         if (hret == H_SUCCESS) {
1079                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1080
1081                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1082                                               port->logical_port_id,
1083                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1084                                               cb4);
1085                 if (hret == H_SUCCESS) {
1086                         switch (cb4->port_speed) {
1087                         case H_SPEED_10M_H:
1088                                 port->port_speed = EHEA_SPEED_10M;
1089                                 port->full_duplex = 0;
1090                                 break;
1091                         case H_SPEED_10M_F:
1092                                 port->port_speed = EHEA_SPEED_10M;
1093                                 port->full_duplex = 1;
1094                                 break;
1095                         case H_SPEED_100M_H:
1096                                 port->port_speed = EHEA_SPEED_100M;
1097                                 port->full_duplex = 0;
1098                                 break;
1099                         case H_SPEED_100M_F:
1100                                 port->port_speed = EHEA_SPEED_100M;
1101                                 port->full_duplex = 1;
1102                                 break;
1103                         case H_SPEED_1G_F:
1104                                 port->port_speed = EHEA_SPEED_1G;
1105                                 port->full_duplex = 1;
1106                                 break;
1107                         case H_SPEED_10G_F:
1108                                 port->port_speed = EHEA_SPEED_10G;
1109                                 port->full_duplex = 1;
1110                                 break;
1111                         default:
1112                                 port->port_speed = 0;
1113                                 port->full_duplex = 0;
1114                                 break;
1115                         }
1116                 } else {
1117                         pr_err("Failed sensing port speed\n");
1118                         ret = -EIO;
1119                 }
1120         } else {
1121                 if (hret == H_AUTHORITY) {
1122                         pr_info("Hypervisor denied setting port speed\n");
1123                         ret = -EPERM;
1124                 } else {
1125                         ret = -EIO;
1126                         pr_err("Failed setting port speed\n");
1127                 }
1128         }
1129         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1130                 netif_carrier_on(port->netdev);
1131
1132         free_page((unsigned long)cb4);
1133 out:
1134         return ret;
1135 }
1136
1137 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1138 {
1139         int ret;
1140         u8 ec;
1141         u8 portnum;
1142         struct ehea_port *port;
1143         struct net_device *dev;
1144
1145         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1146         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1147         port = ehea_get_port(adapter, portnum);
1148         if (!port) {
1149                 netdev_err(NULL, "unknown portnum %x\n", portnum);
1150                 return;
1151         }
1152         dev = port->netdev;
1153
1154         switch (ec) {
1155         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1156
1157                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1158                         if (!netif_carrier_ok(dev)) {
1159                                 ret = ehea_sense_port_attr(port);
1160                                 if (ret) {
1161                                         netdev_err(dev, "failed resensing port attributes\n");
1162                                         break;
1163                                 }
1164
1165                                 netif_info(port, link, dev,
1166                                            "Logical port up: %dMbps %s Duplex\n",
1167                                            port->port_speed,
1168                                            port->full_duplex == 1 ?
1169                                            "Full" : "Half");
1170
1171                                 netif_carrier_on(dev);
1172                                 netif_wake_queue(dev);
1173                         }
1174                 } else
1175                         if (netif_carrier_ok(dev)) {
1176                                 netif_info(port, link, dev,
1177                                            "Logical port down\n");
1178                                 netif_carrier_off(dev);
1179                                 netif_tx_disable(dev);
1180                         }
1181
1182                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1183                         port->phy_link = EHEA_PHY_LINK_UP;
1184                         netif_info(port, link, dev,
1185                                    "Physical port up\n");
1186                         if (prop_carrier_state)
1187                                 netif_carrier_on(dev);
1188                 } else {
1189                         port->phy_link = EHEA_PHY_LINK_DOWN;
1190                         netif_info(port, link, dev,
1191                                    "Physical port down\n");
1192                         if (prop_carrier_state)
1193                                 netif_carrier_off(dev);
1194                 }
1195
1196                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1197                         netdev_info(dev,
1198                                     "External switch port is primary port\n");
1199                 else
1200                         netdev_info(dev,
1201                                     "External switch port is backup port\n");
1202
1203                 break;
1204         case EHEA_EC_ADAPTER_MALFUNC:
1205                 netdev_err(dev, "Adapter malfunction\n");
1206                 break;
1207         case EHEA_EC_PORT_MALFUNC:
1208                 netdev_info(dev, "Port malfunction\n");
1209                 netif_carrier_off(dev);
1210                 netif_tx_disable(dev);
1211                 break;
1212         default:
1213                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1214                 break;
1215         }
1216 }
1217
1218 static void ehea_neq_tasklet(struct tasklet_struct *t)
1219 {
1220         struct ehea_adapter *adapter = from_tasklet(adapter, t, neq_tasklet);
1221         struct ehea_eqe *eqe;
1222         u64 event_mask;
1223
1224         eqe = ehea_poll_eq(adapter->neq);
1225         pr_debug("eqe=%p\n", eqe);
1226
1227         while (eqe) {
1228                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1229                 ehea_parse_eqe(adapter, eqe->entry);
1230                 eqe = ehea_poll_eq(adapter->neq);
1231                 pr_debug("next eqe=%p\n", eqe);
1232         }
1233
1234         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1235                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1236                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1237
1238         ehea_h_reset_events(adapter->handle,
1239                             adapter->neq->fw_handle, event_mask);
1240 }
1241
1242 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1243 {
1244         struct ehea_adapter *adapter = param;
1245         tasklet_hi_schedule(&adapter->neq_tasklet);
1246         return IRQ_HANDLED;
1247 }
1248
1249
1250 static int ehea_fill_port_res(struct ehea_port_res *pr)
1251 {
1252         int ret;
1253         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1254
1255         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1256
1257         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1258
1259         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1260
1261         return ret;
1262 }
1263
1264 static int ehea_reg_interrupts(struct net_device *dev)
1265 {
1266         struct ehea_port *port = netdev_priv(dev);
1267         struct ehea_port_res *pr;
1268         int i, ret;
1269
1270
1271         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1272                  dev->name);
1273
1274         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1275                                   ehea_qp_aff_irq_handler,
1276                                   0, port->int_aff_name, port);
1277         if (ret) {
1278                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1279                            port->qp_eq->attr.ist1);
1280                 goto out_free_qpeq;
1281         }
1282
1283         netif_info(port, ifup, dev,
1284                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1285                    port->qp_eq->attr.ist1);
1286
1287
1288         for (i = 0; i < port->num_def_qps; i++) {
1289                 pr = &port->port_res[i];
1290                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1291                          "%s-queue%d", dev->name, i);
1292                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1293                                           ehea_recv_irq_handler,
1294                                           0, pr->int_send_name, pr);
1295                 if (ret) {
1296                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1297                                    i, pr->eq->attr.ist1);
1298                         goto out_free_req;
1299                 }
1300                 netif_info(port, ifup, dev,
1301                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1302                            pr->eq->attr.ist1, i);
1303         }
1304 out:
1305         return ret;
1306
1307
1308 out_free_req:
1309         while (--i >= 0) {
1310                 u32 ist = port->port_res[i].eq->attr.ist1;
1311                 ibmebus_free_irq(ist, &port->port_res[i]);
1312         }
1313
1314 out_free_qpeq:
1315         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1316         i = port->num_def_qps;
1317
1318         goto out;
1319
1320 }
1321
1322 static void ehea_free_interrupts(struct net_device *dev)
1323 {
1324         struct ehea_port *port = netdev_priv(dev);
1325         struct ehea_port_res *pr;
1326         int i;
1327
1328         /* send */
1329
1330         for (i = 0; i < port->num_def_qps; i++) {
1331                 pr = &port->port_res[i];
1332                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1333                 netif_info(port, intr, dev,
1334                            "free send irq for res %d with handle 0x%X\n",
1335                            i, pr->eq->attr.ist1);
1336         }
1337
1338         /* associated events */
1339         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1340         netif_info(port, intr, dev,
1341                    "associated event interrupt for handle 0x%X freed\n",
1342                    port->qp_eq->attr.ist1);
1343 }
1344
1345 static int ehea_configure_port(struct ehea_port *port)
1346 {
1347         int ret, i;
1348         u64 hret, mask;
1349         struct hcp_ehea_port_cb0 *cb0;
1350
1351         ret = -ENOMEM;
1352         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1353         if (!cb0)
1354                 goto out;
1355
1356         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1357                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1358                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1359                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1360                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1361                                       PXLY_RC_VLAN_FILTER)
1362                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1363
1364         for (i = 0; i < port->num_mcs; i++)
1365                 if (use_mcs)
1366                         cb0->default_qpn_arr[i] =
1367                                 port->port_res[i].qp->init_attr.qp_nr;
1368                 else
1369                         cb0->default_qpn_arr[i] =
1370                                 port->port_res[0].qp->init_attr.qp_nr;
1371
1372         if (netif_msg_ifup(port))
1373                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1374
1375         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1376              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1377
1378         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1379                                        port->logical_port_id,
1380                                        H_PORT_CB0, mask, cb0);
1381         ret = -EIO;
1382         if (hret != H_SUCCESS)
1383                 goto out_free;
1384
1385         ret = 0;
1386
1387 out_free:
1388         free_page((unsigned long)cb0);
1389 out:
1390         return ret;
1391 }
1392
1393 static int ehea_gen_smrs(struct ehea_port_res *pr)
1394 {
1395         int ret;
1396         struct ehea_adapter *adapter = pr->port->adapter;
1397
1398         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1399         if (ret)
1400                 goto out;
1401
1402         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1403         if (ret)
1404                 goto out_free;
1405
1406         return 0;
1407
1408 out_free:
1409         ehea_rem_mr(&pr->send_mr);
1410 out:
1411         pr_err("Generating SMRS failed\n");
1412         return -EIO;
1413 }
1414
1415 static int ehea_rem_smrs(struct ehea_port_res *pr)
1416 {
1417         if ((ehea_rem_mr(&pr->send_mr)) ||
1418             (ehea_rem_mr(&pr->recv_mr)))
1419                 return -EIO;
1420         else
1421                 return 0;
1422 }
1423
1424 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1425 {
1426         int arr_size = sizeof(void *) * max_q_entries;
1427
1428         q_skba->arr = vzalloc(arr_size);
1429         if (!q_skba->arr)
1430                 return -ENOMEM;
1431
1432         q_skba->len = max_q_entries;
1433         q_skba->index = 0;
1434         q_skba->os_skbs = 0;
1435
1436         return 0;
1437 }
1438
1439 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1440                               struct port_res_cfg *pr_cfg, int queue_token)
1441 {
1442         struct ehea_adapter *adapter = port->adapter;
1443         enum ehea_eq_type eq_type = EHEA_EQ;
1444         struct ehea_qp_init_attr *init_attr = NULL;
1445         int ret = -EIO;
1446         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1447
1448         tx_bytes = pr->tx_bytes;
1449         tx_packets = pr->tx_packets;
1450         rx_bytes = pr->rx_bytes;
1451         rx_packets = pr->rx_packets;
1452
1453         memset(pr, 0, sizeof(struct ehea_port_res));
1454
1455         pr->tx_bytes = tx_bytes;
1456         pr->tx_packets = tx_packets;
1457         pr->rx_bytes = rx_bytes;
1458         pr->rx_packets = rx_packets;
1459
1460         pr->port = port;
1461
1462         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1463         if (!pr->eq) {
1464                 pr_err("create_eq failed (eq)\n");
1465                 goto out_free;
1466         }
1467
1468         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1469                                      pr->eq->fw_handle,
1470                                      port->logical_port_id);
1471         if (!pr->recv_cq) {
1472                 pr_err("create_cq failed (cq_recv)\n");
1473                 goto out_free;
1474         }
1475
1476         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1477                                      pr->eq->fw_handle,
1478                                      port->logical_port_id);
1479         if (!pr->send_cq) {
1480                 pr_err("create_cq failed (cq_send)\n");
1481                 goto out_free;
1482         }
1483
1484         if (netif_msg_ifup(port))
1485                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1486                         pr->send_cq->attr.act_nr_of_cqes,
1487                         pr->recv_cq->attr.act_nr_of_cqes);
1488
1489         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1490         if (!init_attr) {
1491                 ret = -ENOMEM;
1492                 pr_err("no mem for ehea_qp_init_attr\n");
1493                 goto out_free;
1494         }
1495
1496         init_attr->low_lat_rq1 = 1;
1497         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1498         init_attr->rq_count = 3;
1499         init_attr->qp_token = queue_token;
1500         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1501         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1502         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1503         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1504         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1505         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1506         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1507         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1508         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1509         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1510         init_attr->port_nr = port->logical_port_id;
1511         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1512         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1513         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1514
1515         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1516         if (!pr->qp) {
1517                 pr_err("create_qp failed\n");
1518                 ret = -EIO;
1519                 goto out_free;
1520         }
1521
1522         if (netif_msg_ifup(port))
1523                 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",
1524                         init_attr->qp_nr,
1525                         init_attr->act_nr_send_wqes,
1526                         init_attr->act_nr_rwqes_rq1,
1527                         init_attr->act_nr_rwqes_rq2,
1528                         init_attr->act_nr_rwqes_rq3);
1529
1530         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1531
1532         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1533         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1534         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1535         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1536         if (ret)
1537                 goto out_free;
1538
1539         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1540         if (ehea_gen_smrs(pr) != 0) {
1541                 ret = -EIO;
1542                 goto out_free;
1543         }
1544
1545         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1546
1547         kfree(init_attr);
1548
1549         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1550
1551         ret = 0;
1552         goto out;
1553
1554 out_free:
1555         kfree(init_attr);
1556         vfree(pr->sq_skba.arr);
1557         vfree(pr->rq1_skba.arr);
1558         vfree(pr->rq2_skba.arr);
1559         vfree(pr->rq3_skba.arr);
1560         ehea_destroy_qp(pr->qp);
1561         ehea_destroy_cq(pr->send_cq);
1562         ehea_destroy_cq(pr->recv_cq);
1563         ehea_destroy_eq(pr->eq);
1564 out:
1565         return ret;
1566 }
1567
1568 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1569 {
1570         int ret, i;
1571
1572         if (pr->qp)
1573                 netif_napi_del(&pr->napi);
1574
1575         ret = ehea_destroy_qp(pr->qp);
1576
1577         if (!ret) {
1578                 ehea_destroy_cq(pr->send_cq);
1579                 ehea_destroy_cq(pr->recv_cq);
1580                 ehea_destroy_eq(pr->eq);
1581
1582                 for (i = 0; i < pr->rq1_skba.len; i++)
1583                         dev_kfree_skb(pr->rq1_skba.arr[i]);
1584
1585                 for (i = 0; i < pr->rq2_skba.len; i++)
1586                         dev_kfree_skb(pr->rq2_skba.arr[i]);
1587
1588                 for (i = 0; i < pr->rq3_skba.len; i++)
1589                         dev_kfree_skb(pr->rq3_skba.arr[i]);
1590
1591                 for (i = 0; i < pr->sq_skba.len; i++)
1592                         dev_kfree_skb(pr->sq_skba.arr[i]);
1593
1594                 vfree(pr->rq1_skba.arr);
1595                 vfree(pr->rq2_skba.arr);
1596                 vfree(pr->rq3_skba.arr);
1597                 vfree(pr->sq_skba.arr);
1598                 ret = ehea_rem_smrs(pr);
1599         }
1600         return ret;
1601 }
1602
1603 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1604                                   u32 lkey)
1605 {
1606         int skb_data_size = skb_headlen(skb);
1607         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1608         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1609         unsigned int immediate_len = SWQE2_MAX_IMM;
1610
1611         swqe->descriptors = 0;
1612
1613         if (skb_is_gso(skb)) {
1614                 swqe->tx_control |= EHEA_SWQE_TSO;
1615                 swqe->mss = skb_shinfo(skb)->gso_size;
1616                 /*
1617                  * For TSO packets we only copy the headers into the
1618                  * immediate area.
1619                  */
1620                 immediate_len = skb_tcp_all_headers(skb);
1621         }
1622
1623         if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1624                 skb_copy_from_linear_data(skb, imm_data, immediate_len);
1625                 swqe->immediate_data_length = immediate_len;
1626
1627                 if (skb_data_size > immediate_len) {
1628                         sg1entry->l_key = lkey;
1629                         sg1entry->len = skb_data_size - immediate_len;
1630                         sg1entry->vaddr =
1631                                 ehea_map_vaddr(skb->data + immediate_len);
1632                         swqe->descriptors++;
1633                 }
1634         } else {
1635                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1636                 swqe->immediate_data_length = skb_data_size;
1637         }
1638 }
1639
1640 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1641                                     struct ehea_swqe *swqe, u32 lkey)
1642 {
1643         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1644         skb_frag_t *frag;
1645         int nfrags, sg1entry_contains_frag_data, i;
1646
1647         nfrags = skb_shinfo(skb)->nr_frags;
1648         sg1entry = &swqe->u.immdata_desc.sg_entry;
1649         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1650         sg1entry_contains_frag_data = 0;
1651
1652         write_swqe2_immediate(skb, swqe, lkey);
1653
1654         /* write descriptors */
1655         if (nfrags > 0) {
1656                 if (swqe->descriptors == 0) {
1657                         /* sg1entry not yet used */
1658                         frag = &skb_shinfo(skb)->frags[0];
1659
1660                         /* copy sg1entry data */
1661                         sg1entry->l_key = lkey;
1662                         sg1entry->len = skb_frag_size(frag);
1663                         sg1entry->vaddr =
1664                                 ehea_map_vaddr(skb_frag_address(frag));
1665                         swqe->descriptors++;
1666                         sg1entry_contains_frag_data = 1;
1667                 }
1668
1669                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1670
1671                         frag = &skb_shinfo(skb)->frags[i];
1672                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1673
1674                         sgentry->l_key = lkey;
1675                         sgentry->len = skb_frag_size(frag);
1676                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1677                         swqe->descriptors++;
1678                 }
1679         }
1680 }
1681
1682 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1683 {
1684         int ret = 0;
1685         u64 hret;
1686         u8 reg_type;
1687
1688         /* De/Register untagged packets */
1689         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1690         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1691                                      port->logical_port_id,
1692                                      reg_type, port->mac_addr, 0, hcallid);
1693         if (hret != H_SUCCESS) {
1694                 pr_err("%sregistering bc address failed (tagged)\n",
1695                        hcallid == H_REG_BCMC ? "" : "de");
1696                 ret = -EIO;
1697                 goto out_herr;
1698         }
1699
1700         /* De/Register VLAN packets */
1701         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1702         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1703                                      port->logical_port_id,
1704                                      reg_type, port->mac_addr, 0, hcallid);
1705         if (hret != H_SUCCESS) {
1706                 pr_err("%sregistering bc address failed (vlan)\n",
1707                        hcallid == H_REG_BCMC ? "" : "de");
1708                 ret = -EIO;
1709         }
1710 out_herr:
1711         return ret;
1712 }
1713
1714 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1715 {
1716         struct ehea_port *port = netdev_priv(dev);
1717         struct sockaddr *mac_addr = sa;
1718         struct hcp_ehea_port_cb0 *cb0;
1719         int ret;
1720         u64 hret;
1721
1722         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1723                 ret = -EADDRNOTAVAIL;
1724                 goto out;
1725         }
1726
1727         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1728         if (!cb0) {
1729                 pr_err("no mem for cb0\n");
1730                 ret = -ENOMEM;
1731                 goto out;
1732         }
1733
1734         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1735
1736         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1737
1738         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1739                                        port->logical_port_id, H_PORT_CB0,
1740                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1741         if (hret != H_SUCCESS) {
1742                 ret = -EIO;
1743                 goto out_free;
1744         }
1745
1746         eth_hw_addr_set(dev, mac_addr->sa_data);
1747
1748         /* Deregister old MAC in pHYP */
1749         if (port->state == EHEA_PORT_UP) {
1750                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1751                 if (ret)
1752                         goto out_upregs;
1753         }
1754
1755         port->mac_addr = cb0->port_mac_addr << 16;
1756
1757         /* Register new MAC in pHYP */
1758         if (port->state == EHEA_PORT_UP) {
1759                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1760                 if (ret)
1761                         goto out_upregs;
1762         }
1763
1764         ret = 0;
1765
1766 out_upregs:
1767         ehea_update_bcmc_registrations();
1768 out_free:
1769         free_page((unsigned long)cb0);
1770 out:
1771         return ret;
1772 }
1773
1774 static void ehea_promiscuous_error(u64 hret, int enable)
1775 {
1776         if (hret == H_AUTHORITY)
1777                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1778                         enable == 1 ? "en" : "dis");
1779         else
1780                 pr_err("failed %sabling promiscuous mode\n",
1781                        enable == 1 ? "en" : "dis");
1782 }
1783
1784 static void ehea_promiscuous(struct net_device *dev, int enable)
1785 {
1786         struct ehea_port *port = netdev_priv(dev);
1787         struct hcp_ehea_port_cb7 *cb7;
1788         u64 hret;
1789
1790         if (enable == port->promisc)
1791                 return;
1792
1793         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1794         if (!cb7) {
1795                 pr_err("no mem for cb7\n");
1796                 goto out;
1797         }
1798
1799         /* Modify Pxs_DUCQPN in CB7 */
1800         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1801
1802         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1803                                        port->logical_port_id,
1804                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1805         if (hret) {
1806                 ehea_promiscuous_error(hret, enable);
1807                 goto out;
1808         }
1809
1810         port->promisc = enable;
1811 out:
1812         free_page((unsigned long)cb7);
1813 }
1814
1815 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1816                                      u32 hcallid)
1817 {
1818         u64 hret;
1819         u8 reg_type;
1820
1821         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1822         if (mc_mac_addr == 0)
1823                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1824
1825         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1826                                      port->logical_port_id,
1827                                      reg_type, mc_mac_addr, 0, hcallid);
1828         if (hret)
1829                 goto out;
1830
1831         reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1832         if (mc_mac_addr == 0)
1833                 reg_type |= EHEA_BCMC_SCOPE_ALL;
1834
1835         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1836                                      port->logical_port_id,
1837                                      reg_type, mc_mac_addr, 0, hcallid);
1838 out:
1839         return hret;
1840 }
1841
1842 static int ehea_drop_multicast_list(struct net_device *dev)
1843 {
1844         struct ehea_port *port = netdev_priv(dev);
1845         struct ehea_mc_list *mc_entry = port->mc_list;
1846         struct list_head *pos;
1847         struct list_head *temp;
1848         int ret = 0;
1849         u64 hret;
1850
1851         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1852                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1853
1854                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1855                                                  H_DEREG_BCMC);
1856                 if (hret) {
1857                         pr_err("failed deregistering mcast MAC\n");
1858                         ret = -EIO;
1859                 }
1860
1861                 list_del(pos);
1862                 kfree(mc_entry);
1863         }
1864         return ret;
1865 }
1866
1867 static void ehea_allmulti(struct net_device *dev, int enable)
1868 {
1869         struct ehea_port *port = netdev_priv(dev);
1870         u64 hret;
1871
1872         if (!port->allmulti) {
1873                 if (enable) {
1874                         /* Enable ALLMULTI */
1875                         ehea_drop_multicast_list(dev);
1876                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1877                         if (!hret)
1878                                 port->allmulti = 1;
1879                         else
1880                                 netdev_err(dev,
1881                                            "failed enabling IFF_ALLMULTI\n");
1882                 }
1883         } else {
1884                 if (!enable) {
1885                         /* Disable ALLMULTI */
1886                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1887                         if (!hret)
1888                                 port->allmulti = 0;
1889                         else
1890                                 netdev_err(dev,
1891                                            "failed disabling IFF_ALLMULTI\n");
1892                 }
1893         }
1894 }
1895
1896 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1897 {
1898         struct ehea_mc_list *ehea_mcl_entry;
1899         u64 hret;
1900
1901         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1902         if (!ehea_mcl_entry)
1903                 return;
1904
1905         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1906
1907         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1908
1909         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1910                                          H_REG_BCMC);
1911         if (!hret)
1912                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1913         else {
1914                 pr_err("failed registering mcast MAC\n");
1915                 kfree(ehea_mcl_entry);
1916         }
1917 }
1918
1919 static void ehea_set_multicast_list(struct net_device *dev)
1920 {
1921         struct ehea_port *port = netdev_priv(dev);
1922         struct netdev_hw_addr *ha;
1923         int ret;
1924
1925         ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1926
1927         if (dev->flags & IFF_ALLMULTI) {
1928                 ehea_allmulti(dev, 1);
1929                 goto out;
1930         }
1931         ehea_allmulti(dev, 0);
1932
1933         if (!netdev_mc_empty(dev)) {
1934                 ret = ehea_drop_multicast_list(dev);
1935                 if (ret) {
1936                         /* Dropping the current multicast list failed.
1937                          * Enabling ALL_MULTI is the best we can do.
1938                          */
1939                         ehea_allmulti(dev, 1);
1940                 }
1941
1942                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1943                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1944                                 port->adapter->max_mc_mac);
1945                         goto out;
1946                 }
1947
1948                 netdev_for_each_mc_addr(ha, dev)
1949                         ehea_add_multicast_entry(port, ha->addr);
1950
1951         }
1952 out:
1953         ehea_update_bcmc_registrations();
1954 }
1955
1956 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1957 {
1958         swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1959
1960         if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1961                 return;
1962
1963         if (skb->ip_summed == CHECKSUM_PARTIAL)
1964                 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1965
1966         swqe->ip_start = skb_network_offset(skb);
1967         swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1968
1969         switch (ip_hdr(skb)->protocol) {
1970         case IPPROTO_UDP:
1971                 if (skb->ip_summed == CHECKSUM_PARTIAL)
1972                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1973
1974                 swqe->tcp_offset = swqe->ip_end + 1 +
1975                                    offsetof(struct udphdr, check);
1976                 break;
1977
1978         case IPPROTO_TCP:
1979                 if (skb->ip_summed == CHECKSUM_PARTIAL)
1980                         swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1981
1982                 swqe->tcp_offset = swqe->ip_end + 1 +
1983                                    offsetof(struct tcphdr, check);
1984                 break;
1985         }
1986 }
1987
1988 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1989                        struct ehea_swqe *swqe, u32 lkey)
1990 {
1991         swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
1992
1993         xmit_common(skb, swqe);
1994
1995         write_swqe2_data(skb, dev, swqe, lkey);
1996 }
1997
1998 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
1999                        struct ehea_swqe *swqe)
2000 {
2001         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2002
2003         xmit_common(skb, swqe);
2004
2005         if (!skb->data_len)
2006                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2007         else
2008                 skb_copy_bits(skb, 0, imm_data, skb->len);
2009
2010         swqe->immediate_data_length = skb->len;
2011         dev_consume_skb_any(skb);
2012 }
2013
2014 static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2015 {
2016         struct ehea_port *port = netdev_priv(dev);
2017         struct ehea_swqe *swqe;
2018         u32 lkey;
2019         int swqe_index;
2020         struct ehea_port_res *pr;
2021         struct netdev_queue *txq;
2022
2023         pr = &port->port_res[skb_get_queue_mapping(skb)];
2024         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2025
2026         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2027         memset(swqe, 0, SWQE_HEADER_SIZE);
2028         atomic_dec(&pr->swqe_avail);
2029
2030         if (skb_vlan_tag_present(skb)) {
2031                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2032                 swqe->vlan_tag = skb_vlan_tag_get(skb);
2033         }
2034
2035         pr->tx_packets++;
2036         pr->tx_bytes += skb->len;
2037
2038         if (skb->len <= SWQE3_MAX_IMM) {
2039                 u32 sig_iv = port->sig_comp_iv;
2040                 u32 swqe_num = pr->swqe_id_counter;
2041                 ehea_xmit3(skb, dev, swqe);
2042                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2043                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2044                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2045                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2046                                                       sig_iv);
2047                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2048                         pr->swqe_ll_count = 0;
2049                 } else
2050                         pr->swqe_ll_count += 1;
2051         } else {
2052                 swqe->wr_id =
2053                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2054                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2055                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2056                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2057                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2058
2059                 pr->sq_skba.index++;
2060                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2061
2062                 lkey = pr->send_mr.lkey;
2063                 ehea_xmit2(skb, dev, swqe, lkey);
2064                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2065         }
2066         pr->swqe_id_counter += 1;
2067
2068         netif_info(port, tx_queued, dev,
2069                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2070         if (netif_msg_tx_queued(port))
2071                 ehea_dump(swqe, 512, "swqe");
2072
2073         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2074                 netif_tx_stop_queue(txq);
2075                 swqe->tx_control |= EHEA_SWQE_PURGE;
2076         }
2077
2078         ehea_post_swqe(pr->qp, swqe);
2079
2080         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2081                 pr->p_stats.queue_stopped++;
2082                 netif_tx_stop_queue(txq);
2083         }
2084
2085         return NETDEV_TX_OK;
2086 }
2087
2088 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2089 {
2090         struct ehea_port *port = netdev_priv(dev);
2091         struct ehea_adapter *adapter = port->adapter;
2092         struct hcp_ehea_port_cb1 *cb1;
2093         int index;
2094         u64 hret;
2095         int err = 0;
2096
2097         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2098         if (!cb1) {
2099                 pr_err("no mem for cb1\n");
2100                 err = -ENOMEM;
2101                 goto out;
2102         }
2103
2104         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2105                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2106         if (hret != H_SUCCESS) {
2107                 pr_err("query_ehea_port failed\n");
2108                 err = -EINVAL;
2109                 goto out;
2110         }
2111
2112         index = (vid / 64);
2113         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2114
2115         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2116                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2117         if (hret != H_SUCCESS) {
2118                 pr_err("modify_ehea_port failed\n");
2119                 err = -EINVAL;
2120         }
2121 out:
2122         free_page((unsigned long)cb1);
2123         return err;
2124 }
2125
2126 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2127 {
2128         struct ehea_port *port = netdev_priv(dev);
2129         struct ehea_adapter *adapter = port->adapter;
2130         struct hcp_ehea_port_cb1 *cb1;
2131         int index;
2132         u64 hret;
2133         int err = 0;
2134
2135         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2136         if (!cb1) {
2137                 pr_err("no mem for cb1\n");
2138                 err = -ENOMEM;
2139                 goto out;
2140         }
2141
2142         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2143                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2144         if (hret != H_SUCCESS) {
2145                 pr_err("query_ehea_port failed\n");
2146                 err = -EINVAL;
2147                 goto out;
2148         }
2149
2150         index = (vid / 64);
2151         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2152
2153         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2154                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2155         if (hret != H_SUCCESS) {
2156                 pr_err("modify_ehea_port failed\n");
2157                 err = -EINVAL;
2158         }
2159 out:
2160         free_page((unsigned long)cb1);
2161         return err;
2162 }
2163
2164 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2165 {
2166         int ret = -EIO;
2167         u64 hret;
2168         u16 dummy16 = 0;
2169         u64 dummy64 = 0;
2170         struct hcp_modify_qp_cb0 *cb0;
2171
2172         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2173         if (!cb0) {
2174                 ret = -ENOMEM;
2175                 goto out;
2176         }
2177
2178         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2179                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2180         if (hret != H_SUCCESS) {
2181                 pr_err("query_ehea_qp failed (1)\n");
2182                 goto out;
2183         }
2184
2185         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2186         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2187                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2188                                      &dummy64, &dummy64, &dummy16, &dummy16);
2189         if (hret != H_SUCCESS) {
2190                 pr_err("modify_ehea_qp failed (1)\n");
2191                 goto out;
2192         }
2193
2194         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2195                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2196         if (hret != H_SUCCESS) {
2197                 pr_err("query_ehea_qp failed (2)\n");
2198                 goto out;
2199         }
2200
2201         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2202         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2203                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2204                                      &dummy64, &dummy64, &dummy16, &dummy16);
2205         if (hret != H_SUCCESS) {
2206                 pr_err("modify_ehea_qp failed (2)\n");
2207                 goto out;
2208         }
2209
2210         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2211                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2212         if (hret != H_SUCCESS) {
2213                 pr_err("query_ehea_qp failed (3)\n");
2214                 goto out;
2215         }
2216
2217         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2218         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2219                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2220                                      &dummy64, &dummy64, &dummy16, &dummy16);
2221         if (hret != H_SUCCESS) {
2222                 pr_err("modify_ehea_qp failed (3)\n");
2223                 goto out;
2224         }
2225
2226         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2227                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2228         if (hret != H_SUCCESS) {
2229                 pr_err("query_ehea_qp failed (4)\n");
2230                 goto out;
2231         }
2232
2233         ret = 0;
2234 out:
2235         free_page((unsigned long)cb0);
2236         return ret;
2237 }
2238
2239 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2240 {
2241         int ret, i;
2242         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2243         enum ehea_eq_type eq_type = EHEA_EQ;
2244
2245         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2246                                    EHEA_MAX_ENTRIES_EQ, 1);
2247         if (!port->qp_eq) {
2248                 ret = -EINVAL;
2249                 pr_err("ehea_create_eq failed (qp_eq)\n");
2250                 goto out_kill_eq;
2251         }
2252
2253         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2254         pr_cfg.max_entries_scq = sq_entries * 2;
2255         pr_cfg.max_entries_sq = sq_entries;
2256         pr_cfg.max_entries_rq1 = rq1_entries;
2257         pr_cfg.max_entries_rq2 = rq2_entries;
2258         pr_cfg.max_entries_rq3 = rq3_entries;
2259
2260         pr_cfg_small_rx.max_entries_rcq = 1;
2261         pr_cfg_small_rx.max_entries_scq = sq_entries;
2262         pr_cfg_small_rx.max_entries_sq = sq_entries;
2263         pr_cfg_small_rx.max_entries_rq1 = 1;
2264         pr_cfg_small_rx.max_entries_rq2 = 1;
2265         pr_cfg_small_rx.max_entries_rq3 = 1;
2266
2267         for (i = 0; i < def_qps; i++) {
2268                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2269                 if (ret)
2270                         goto out_clean_pr;
2271         }
2272         for (i = def_qps; i < def_qps; i++) {
2273                 ret = ehea_init_port_res(port, &port->port_res[i],
2274                                          &pr_cfg_small_rx, i);
2275                 if (ret)
2276                         goto out_clean_pr;
2277         }
2278
2279         return 0;
2280
2281 out_clean_pr:
2282         while (--i >= 0)
2283                 ehea_clean_portres(port, &port->port_res[i]);
2284
2285 out_kill_eq:
2286         ehea_destroy_eq(port->qp_eq);
2287         return ret;
2288 }
2289
2290 static int ehea_clean_all_portres(struct ehea_port *port)
2291 {
2292         int ret = 0;
2293         int i;
2294
2295         for (i = 0; i < port->num_def_qps; i++)
2296                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2297
2298         ret |= ehea_destroy_eq(port->qp_eq);
2299
2300         return ret;
2301 }
2302
2303 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2304 {
2305         if (adapter->active_ports)
2306                 return;
2307
2308         ehea_rem_mr(&adapter->mr);
2309 }
2310
2311 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2312 {
2313         if (adapter->active_ports)
2314                 return 0;
2315
2316         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2317 }
2318
2319 static int ehea_up(struct net_device *dev)
2320 {
2321         int ret, i;
2322         struct ehea_port *port = netdev_priv(dev);
2323
2324         if (port->state == EHEA_PORT_UP)
2325                 return 0;
2326
2327         ret = ehea_port_res_setup(port, port->num_def_qps);
2328         if (ret) {
2329                 netdev_err(dev, "port_res_failed\n");
2330                 goto out;
2331         }
2332
2333         /* Set default QP for this port */
2334         ret = ehea_configure_port(port);
2335         if (ret) {
2336                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2337                 goto out_clean_pr;
2338         }
2339
2340         ret = ehea_reg_interrupts(dev);
2341         if (ret) {
2342                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2343                 goto out_clean_pr;
2344         }
2345
2346         for (i = 0; i < port->num_def_qps; i++) {
2347                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2348                 if (ret) {
2349                         netdev_err(dev, "activate_qp failed\n");
2350                         goto out_free_irqs;
2351                 }
2352         }
2353
2354         for (i = 0; i < port->num_def_qps; i++) {
2355                 ret = ehea_fill_port_res(&port->port_res[i]);
2356                 if (ret) {
2357                         netdev_err(dev, "out_free_irqs\n");
2358                         goto out_free_irqs;
2359                 }
2360         }
2361
2362         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2363         if (ret) {
2364                 ret = -EIO;
2365                 goto out_free_irqs;
2366         }
2367
2368         port->state = EHEA_PORT_UP;
2369
2370         ret = 0;
2371         goto out;
2372
2373 out_free_irqs:
2374         ehea_free_interrupts(dev);
2375
2376 out_clean_pr:
2377         ehea_clean_all_portres(port);
2378 out:
2379         if (ret)
2380                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2381
2382         ehea_update_bcmc_registrations();
2383         ehea_update_firmware_handles();
2384
2385         return ret;
2386 }
2387
2388 static void port_napi_disable(struct ehea_port *port)
2389 {
2390         int i;
2391
2392         for (i = 0; i < port->num_def_qps; i++)
2393                 napi_disable(&port->port_res[i].napi);
2394 }
2395
2396 static void port_napi_enable(struct ehea_port *port)
2397 {
2398         int i;
2399
2400         for (i = 0; i < port->num_def_qps; i++)
2401                 napi_enable(&port->port_res[i].napi);
2402 }
2403
2404 static int ehea_open(struct net_device *dev)
2405 {
2406         int ret;
2407         struct ehea_port *port = netdev_priv(dev);
2408
2409         mutex_lock(&port->port_lock);
2410
2411         netif_info(port, ifup, dev, "enabling port\n");
2412
2413         netif_carrier_off(dev);
2414
2415         ret = ehea_up(dev);
2416         if (!ret) {
2417                 port_napi_enable(port);
2418                 netif_tx_start_all_queues(dev);
2419         }
2420
2421         mutex_unlock(&port->port_lock);
2422         schedule_delayed_work(&port->stats_work,
2423                               round_jiffies_relative(msecs_to_jiffies(1000)));
2424
2425         return ret;
2426 }
2427
2428 static int ehea_down(struct net_device *dev)
2429 {
2430         int ret;
2431         struct ehea_port *port = netdev_priv(dev);
2432
2433         if (port->state == EHEA_PORT_DOWN)
2434                 return 0;
2435
2436         ehea_drop_multicast_list(dev);
2437         ehea_allmulti(dev, 0);
2438         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2439
2440         ehea_free_interrupts(dev);
2441
2442         port->state = EHEA_PORT_DOWN;
2443
2444         ehea_update_bcmc_registrations();
2445
2446         ret = ehea_clean_all_portres(port);
2447         if (ret)
2448                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2449
2450         ehea_update_firmware_handles();
2451
2452         return ret;
2453 }
2454
2455 static int ehea_stop(struct net_device *dev)
2456 {
2457         int ret;
2458         struct ehea_port *port = netdev_priv(dev);
2459
2460         netif_info(port, ifdown, dev, "disabling port\n");
2461
2462         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2463         cancel_work_sync(&port->reset_task);
2464         cancel_delayed_work_sync(&port->stats_work);
2465         mutex_lock(&port->port_lock);
2466         netif_tx_stop_all_queues(dev);
2467         port_napi_disable(port);
2468         ret = ehea_down(dev);
2469         mutex_unlock(&port->port_lock);
2470         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2471         return ret;
2472 }
2473
2474 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2475 {
2476         struct ehea_qp qp = *orig_qp;
2477         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2478         struct ehea_swqe *swqe;
2479         int wqe_index;
2480         int i;
2481
2482         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2483                 swqe = ehea_get_swqe(&qp, &wqe_index);
2484                 swqe->tx_control |= EHEA_SWQE_PURGE;
2485         }
2486 }
2487
2488 static void ehea_flush_sq(struct ehea_port *port)
2489 {
2490         int i;
2491
2492         for (i = 0; i < port->num_def_qps; i++) {
2493                 struct ehea_port_res *pr = &port->port_res[i];
2494                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2495                 int ret;
2496
2497                 ret = wait_event_timeout(port->swqe_avail_wq,
2498                          atomic_read(&pr->swqe_avail) >= swqe_max,
2499                          msecs_to_jiffies(100));
2500
2501                 if (!ret) {
2502                         pr_err("WARNING: sq not flushed completely\n");
2503                         break;
2504                 }
2505         }
2506 }
2507
2508 static int ehea_stop_qps(struct net_device *dev)
2509 {
2510         struct ehea_port *port = netdev_priv(dev);
2511         struct ehea_adapter *adapter = port->adapter;
2512         struct hcp_modify_qp_cb0 *cb0;
2513         int ret = -EIO;
2514         int dret;
2515         int i;
2516         u64 hret;
2517         u64 dummy64 = 0;
2518         u16 dummy16 = 0;
2519
2520         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2521         if (!cb0) {
2522                 ret = -ENOMEM;
2523                 goto out;
2524         }
2525
2526         for (i = 0; i < (port->num_def_qps); i++) {
2527                 struct ehea_port_res *pr =  &port->port_res[i];
2528                 struct ehea_qp *qp = pr->qp;
2529
2530                 /* Purge send queue */
2531                 ehea_purge_sq(qp);
2532
2533                 /* Disable queue pair */
2534                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2535                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2536                                             cb0);
2537                 if (hret != H_SUCCESS) {
2538                         pr_err("query_ehea_qp failed (1)\n");
2539                         goto out;
2540                 }
2541
2542                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2543                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2544
2545                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2546                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2547                                                             1), cb0, &dummy64,
2548                                              &dummy64, &dummy16, &dummy16);
2549                 if (hret != H_SUCCESS) {
2550                         pr_err("modify_ehea_qp failed (1)\n");
2551                         goto out;
2552                 }
2553
2554                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2555                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2556                                             cb0);
2557                 if (hret != H_SUCCESS) {
2558                         pr_err("query_ehea_qp failed (2)\n");
2559                         goto out;
2560                 }
2561
2562                 /* deregister shared memory regions */
2563                 dret = ehea_rem_smrs(pr);
2564                 if (dret) {
2565                         pr_err("unreg shared memory region failed\n");
2566                         goto out;
2567                 }
2568         }
2569
2570         ret = 0;
2571 out:
2572         free_page((unsigned long)cb0);
2573
2574         return ret;
2575 }
2576
2577 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2578 {
2579         struct ehea_qp qp = *orig_qp;
2580         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2581         struct ehea_rwqe *rwqe;
2582         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2583         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2584         struct sk_buff *skb;
2585         u32 lkey = pr->recv_mr.lkey;
2586
2587
2588         int i;
2589         int index;
2590
2591         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2592                 rwqe = ehea_get_next_rwqe(&qp, 2);
2593                 rwqe->sg_list[0].l_key = lkey;
2594                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2595                 skb = skba_rq2[index];
2596                 if (skb)
2597                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2598         }
2599
2600         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2601                 rwqe = ehea_get_next_rwqe(&qp, 3);
2602                 rwqe->sg_list[0].l_key = lkey;
2603                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2604                 skb = skba_rq3[index];
2605                 if (skb)
2606                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2607         }
2608 }
2609
2610 static int ehea_restart_qps(struct net_device *dev)
2611 {
2612         struct ehea_port *port = netdev_priv(dev);
2613         struct ehea_adapter *adapter = port->adapter;
2614         int ret = 0;
2615         int i;
2616
2617         struct hcp_modify_qp_cb0 *cb0;
2618         u64 hret;
2619         u64 dummy64 = 0;
2620         u16 dummy16 = 0;
2621
2622         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2623         if (!cb0)
2624                 return -ENOMEM;
2625
2626         for (i = 0; i < (port->num_def_qps); i++) {
2627                 struct ehea_port_res *pr =  &port->port_res[i];
2628                 struct ehea_qp *qp = pr->qp;
2629
2630                 ret = ehea_gen_smrs(pr);
2631                 if (ret) {
2632                         netdev_err(dev, "creation of shared memory regions failed\n");
2633                         goto out;
2634                 }
2635
2636                 ehea_update_rqs(qp, pr);
2637
2638                 /* Enable queue pair */
2639                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2640                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2641                                             cb0);
2642                 if (hret != H_SUCCESS) {
2643                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2644                         ret = -EFAULT;
2645                         goto out;
2646                 }
2647
2648                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2649                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2650
2651                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2652                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2653                                                             1), cb0, &dummy64,
2654                                              &dummy64, &dummy16, &dummy16);
2655                 if (hret != H_SUCCESS) {
2656                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2657                         ret = -EFAULT;
2658                         goto out;
2659                 }
2660
2661                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2662                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2663                                             cb0);
2664                 if (hret != H_SUCCESS) {
2665                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2666                         ret = -EFAULT;
2667                         goto out;
2668                 }
2669
2670                 /* refill entire queue */
2671                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2672                 ehea_refill_rq2(pr, 0);
2673                 ehea_refill_rq3(pr, 0);
2674         }
2675 out:
2676         free_page((unsigned long)cb0);
2677
2678         return ret;
2679 }
2680
2681 static void ehea_reset_port(struct work_struct *work)
2682 {
2683         int ret;
2684         struct ehea_port *port =
2685                 container_of(work, struct ehea_port, reset_task);
2686         struct net_device *dev = port->netdev;
2687
2688         mutex_lock(&dlpar_mem_lock);
2689         port->resets++;
2690         mutex_lock(&port->port_lock);
2691         netif_tx_disable(dev);
2692
2693         port_napi_disable(port);
2694
2695         ehea_down(dev);
2696
2697         ret = ehea_up(dev);
2698         if (ret)
2699                 goto out;
2700
2701         ehea_set_multicast_list(dev);
2702
2703         netif_info(port, timer, dev, "reset successful\n");
2704
2705         port_napi_enable(port);
2706
2707         netif_tx_wake_all_queues(dev);
2708 out:
2709         mutex_unlock(&port->port_lock);
2710         mutex_unlock(&dlpar_mem_lock);
2711 }
2712
2713 static void ehea_rereg_mrs(void)
2714 {
2715         int ret, i;
2716         struct ehea_adapter *adapter;
2717
2718         pr_info("LPAR memory changed - re-initializing driver\n");
2719
2720         list_for_each_entry(adapter, &adapter_list, list)
2721                 if (adapter->active_ports) {
2722                         /* Shutdown all ports */
2723                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2724                                 struct ehea_port *port = adapter->port[i];
2725                                 struct net_device *dev;
2726
2727                                 if (!port)
2728                                         continue;
2729
2730                                 dev = port->netdev;
2731
2732                                 if (dev->flags & IFF_UP) {
2733                                         mutex_lock(&port->port_lock);
2734                                         netif_tx_disable(dev);
2735                                         ehea_flush_sq(port);
2736                                         ret = ehea_stop_qps(dev);
2737                                         if (ret) {
2738                                                 mutex_unlock(&port->port_lock);
2739                                                 goto out;
2740                                         }
2741                                         port_napi_disable(port);
2742                                         mutex_unlock(&port->port_lock);
2743                                 }
2744                                 reset_sq_restart_flag(port);
2745                         }
2746
2747                         /* Unregister old memory region */
2748                         ret = ehea_rem_mr(&adapter->mr);
2749                         if (ret) {
2750                                 pr_err("unregister MR failed - driver inoperable!\n");
2751                                 goto out;
2752                         }
2753                 }
2754
2755         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2756
2757         list_for_each_entry(adapter, &adapter_list, list)
2758                 if (adapter->active_ports) {
2759                         /* Register new memory region */
2760                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2761                         if (ret) {
2762                                 pr_err("register MR failed - driver inoperable!\n");
2763                                 goto out;
2764                         }
2765
2766                         /* Restart all ports */
2767                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2768                                 struct ehea_port *port = adapter->port[i];
2769
2770                                 if (port) {
2771                                         struct net_device *dev = port->netdev;
2772
2773                                         if (dev->flags & IFF_UP) {
2774                                                 mutex_lock(&port->port_lock);
2775                                                 ret = ehea_restart_qps(dev);
2776                                                 if (!ret) {
2777                                                         check_sqs(port);
2778                                                         port_napi_enable(port);
2779                                                         netif_tx_wake_all_queues(dev);
2780                                                 } else {
2781                                                         netdev_err(dev, "Unable to restart QPS\n");
2782                                                 }
2783                                                 mutex_unlock(&port->port_lock);
2784                                         }
2785                                 }
2786                         }
2787                 }
2788         pr_info("re-initializing driver complete\n");
2789 out:
2790         return;
2791 }
2792
2793 static void ehea_tx_watchdog(struct net_device *dev, unsigned int txqueue)
2794 {
2795         struct ehea_port *port = netdev_priv(dev);
2796
2797         if (netif_carrier_ok(dev) &&
2798             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2799                 ehea_schedule_port_reset(port);
2800 }
2801
2802 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2803 {
2804         struct hcp_query_ehea *cb;
2805         u64 hret;
2806         int ret;
2807
2808         cb = (void *)get_zeroed_page(GFP_KERNEL);
2809         if (!cb) {
2810                 ret = -ENOMEM;
2811                 goto out;
2812         }
2813
2814         hret = ehea_h_query_ehea(adapter->handle, cb);
2815
2816         if (hret != H_SUCCESS) {
2817                 ret = -EIO;
2818                 goto out_herr;
2819         }
2820
2821         adapter->max_mc_mac = cb->max_mc_mac - 1;
2822         ret = 0;
2823
2824 out_herr:
2825         free_page((unsigned long)cb);
2826 out:
2827         return ret;
2828 }
2829
2830 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2831 {
2832         struct hcp_ehea_port_cb4 *cb4;
2833         u64 hret;
2834         int ret = 0;
2835
2836         *jumbo = 0;
2837
2838         /* (Try to) enable *jumbo frames */
2839         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2840         if (!cb4) {
2841                 pr_err("no mem for cb4\n");
2842                 ret = -ENOMEM;
2843                 goto out;
2844         } else {
2845                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2846                                               port->logical_port_id,
2847                                               H_PORT_CB4,
2848                                               H_PORT_CB4_JUMBO, cb4);
2849                 if (hret == H_SUCCESS) {
2850                         if (cb4->jumbo_frame)
2851                                 *jumbo = 1;
2852                         else {
2853                                 cb4->jumbo_frame = 1;
2854                                 hret = ehea_h_modify_ehea_port(port->adapter->
2855                                                                handle,
2856                                                                port->
2857                                                                logical_port_id,
2858                                                                H_PORT_CB4,
2859                                                                H_PORT_CB4_JUMBO,
2860                                                                cb4);
2861                                 if (hret == H_SUCCESS)
2862                                         *jumbo = 1;
2863                         }
2864                 } else
2865                         ret = -EINVAL;
2866
2867                 free_page((unsigned long)cb4);
2868         }
2869 out:
2870         return ret;
2871 }
2872
2873 static ssize_t log_port_id_show(struct device *dev,
2874                                 struct device_attribute *attr, char *buf)
2875 {
2876         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2877         return sprintf(buf, "%d", port->logical_port_id);
2878 }
2879
2880 static DEVICE_ATTR_RO(log_port_id);
2881
2882 static void logical_port_release(struct device *dev)
2883 {
2884         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2885         of_node_put(port->ofdev.dev.of_node);
2886 }
2887
2888 static struct device *ehea_register_port(struct ehea_port *port,
2889                                          struct device_node *dn)
2890 {
2891         int ret;
2892
2893         port->ofdev.dev.of_node = of_node_get(dn);
2894         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2895         port->ofdev.dev.bus = &ibmebus_bus_type;
2896
2897         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2898         port->ofdev.dev.release = logical_port_release;
2899
2900         ret = of_device_register(&port->ofdev);
2901         if (ret) {
2902                 pr_err("failed to register device. ret=%d\n", ret);
2903                 goto out;
2904         }
2905
2906         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2907         if (ret) {
2908                 pr_err("failed to register attributes, ret=%d\n", ret);
2909                 goto out_unreg_of_dev;
2910         }
2911
2912         return &port->ofdev.dev;
2913
2914 out_unreg_of_dev:
2915         of_device_unregister(&port->ofdev);
2916 out:
2917         return NULL;
2918 }
2919
2920 static void ehea_unregister_port(struct ehea_port *port)
2921 {
2922         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2923         of_device_unregister(&port->ofdev);
2924 }
2925
2926 static const struct net_device_ops ehea_netdev_ops = {
2927         .ndo_open               = ehea_open,
2928         .ndo_stop               = ehea_stop,
2929         .ndo_start_xmit         = ehea_start_xmit,
2930         .ndo_get_stats64        = ehea_get_stats64,
2931         .ndo_set_mac_address    = ehea_set_mac_addr,
2932         .ndo_validate_addr      = eth_validate_addr,
2933         .ndo_set_rx_mode        = ehea_set_multicast_list,
2934         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
2935         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
2936         .ndo_tx_timeout         = ehea_tx_watchdog,
2937 };
2938
2939 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2940                                          u32 logical_port_id,
2941                                          struct device_node *dn)
2942 {
2943         int ret;
2944         struct net_device *dev;
2945         struct ehea_port *port;
2946         struct device *port_dev;
2947         int jumbo;
2948
2949         /* allocate memory for the port structures */
2950         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2951
2952         if (!dev) {
2953                 ret = -ENOMEM;
2954                 goto out_err;
2955         }
2956
2957         port = netdev_priv(dev);
2958
2959         mutex_init(&port->port_lock);
2960         port->state = EHEA_PORT_DOWN;
2961         port->sig_comp_iv = sq_entries / 10;
2962
2963         port->adapter = adapter;
2964         port->netdev = dev;
2965         port->logical_port_id = logical_port_id;
2966
2967         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2968
2969         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2970         if (!port->mc_list) {
2971                 ret = -ENOMEM;
2972                 goto out_free_ethdev;
2973         }
2974
2975         INIT_LIST_HEAD(&port->mc_list->list);
2976
2977         ret = ehea_sense_port_attr(port);
2978         if (ret)
2979                 goto out_free_mc_list;
2980
2981         netif_set_real_num_rx_queues(dev, port->num_def_qps);
2982         netif_set_real_num_tx_queues(dev, port->num_def_qps);
2983
2984         port_dev = ehea_register_port(port, dn);
2985         if (!port_dev)
2986                 goto out_free_mc_list;
2987
2988         SET_NETDEV_DEV(dev, port_dev);
2989
2990         /* initialize net_device structure */
2991         eth_hw_addr_set(dev, (u8 *)&port->mac_addr);
2992
2993         dev->netdev_ops = &ehea_netdev_ops;
2994         ehea_set_ethtool_ops(dev);
2995
2996         dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
2997                       NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
2998         dev->features = NETIF_F_SG | NETIF_F_TSO |
2999                       NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3000                       NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3001                       NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3002         dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3003                         NETIF_F_IP_CSUM;
3004         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3005
3006         /* MTU range: 68 - 9022 */
3007         dev->min_mtu = ETH_MIN_MTU;
3008         dev->max_mtu = EHEA_MAX_PACKET_SIZE;
3009
3010         INIT_WORK(&port->reset_task, ehea_reset_port);
3011         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3012
3013         init_waitqueue_head(&port->swqe_avail_wq);
3014         init_waitqueue_head(&port->restart_wq);
3015
3016         ret = register_netdev(dev);
3017         if (ret) {
3018                 pr_err("register_netdev failed. ret=%d\n", ret);
3019                 goto out_unreg_port;
3020         }
3021
3022         ret = ehea_get_jumboframe_status(port, &jumbo);
3023         if (ret)
3024                 netdev_err(dev, "failed determining jumbo frame status\n");
3025
3026         netdev_info(dev, "Jumbo frames are %sabled\n",
3027                     jumbo == 1 ? "en" : "dis");
3028
3029         adapter->active_ports++;
3030
3031         return port;
3032
3033 out_unreg_port:
3034         ehea_unregister_port(port);
3035
3036 out_free_mc_list:
3037         kfree(port->mc_list);
3038
3039 out_free_ethdev:
3040         free_netdev(dev);
3041
3042 out_err:
3043         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3044                logical_port_id, ret);
3045         return NULL;
3046 }
3047
3048 static void ehea_shutdown_single_port(struct ehea_port *port)
3049 {
3050         struct ehea_adapter *adapter = port->adapter;
3051
3052         cancel_work_sync(&port->reset_task);
3053         cancel_delayed_work_sync(&port->stats_work);
3054         unregister_netdev(port->netdev);
3055         ehea_unregister_port(port);
3056         kfree(port->mc_list);
3057         free_netdev(port->netdev);
3058         adapter->active_ports--;
3059 }
3060
3061 static int ehea_setup_ports(struct ehea_adapter *adapter)
3062 {
3063         struct device_node *lhea_dn;
3064         struct device_node *eth_dn = NULL;
3065
3066         const u32 *dn_log_port_id;
3067         int i = 0;
3068
3069         lhea_dn = adapter->ofdev->dev.of_node;
3070         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3071
3072                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3073                                                  NULL);
3074                 if (!dn_log_port_id) {
3075                         pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
3076                         continue;
3077                 }
3078
3079                 if (ehea_add_adapter_mr(adapter)) {
3080                         pr_err("creating MR failed\n");
3081                         of_node_put(eth_dn);
3082                         return -EIO;
3083                 }
3084
3085                 adapter->port[i] = ehea_setup_single_port(adapter,
3086                                                           *dn_log_port_id,
3087                                                           eth_dn);
3088                 if (adapter->port[i])
3089                         netdev_info(adapter->port[i]->netdev,
3090                                     "logical port id #%d\n", *dn_log_port_id);
3091                 else
3092                         ehea_remove_adapter_mr(adapter);
3093
3094                 i++;
3095         }
3096         return 0;
3097 }
3098
3099 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3100                                            u32 logical_port_id)
3101 {
3102         struct device_node *lhea_dn;
3103         struct device_node *eth_dn = NULL;
3104         const u32 *dn_log_port_id;
3105
3106         lhea_dn = adapter->ofdev->dev.of_node;
3107         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3108
3109                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3110                                                  NULL);
3111                 if (dn_log_port_id)
3112                         if (*dn_log_port_id == logical_port_id)
3113                                 return eth_dn;
3114         }
3115
3116         return NULL;
3117 }
3118
3119 static ssize_t probe_port_store(struct device *dev,
3120                                struct device_attribute *attr,
3121                                const char *buf, size_t count)
3122 {
3123         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3124         struct ehea_port *port;
3125         struct device_node *eth_dn = NULL;
3126         int i;
3127
3128         u32 logical_port_id;
3129
3130         sscanf(buf, "%d", &logical_port_id);
3131
3132         port = ehea_get_port(adapter, logical_port_id);
3133
3134         if (port) {
3135                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3136                             logical_port_id);
3137                 return -EINVAL;
3138         }
3139
3140         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3141
3142         if (!eth_dn) {
3143                 pr_info("no logical port with id %d found\n", logical_port_id);
3144                 return -EINVAL;
3145         }
3146
3147         if (ehea_add_adapter_mr(adapter)) {
3148                 pr_err("creating MR failed\n");
3149                 of_node_put(eth_dn);
3150                 return -EIO;
3151         }
3152
3153         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3154
3155         of_node_put(eth_dn);
3156
3157         if (port) {
3158                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3159                         if (!adapter->port[i]) {
3160                                 adapter->port[i] = port;
3161                                 break;
3162                         }
3163
3164                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3165                             logical_port_id);
3166         } else {
3167                 ehea_remove_adapter_mr(adapter);
3168                 return -EIO;
3169         }
3170
3171         return (ssize_t) count;
3172 }
3173
3174 static ssize_t remove_port_store(struct device *dev,
3175                                  struct device_attribute *attr,
3176                                  const char *buf, size_t count)
3177 {
3178         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3179         struct ehea_port *port;
3180         int i;
3181         u32 logical_port_id;
3182
3183         sscanf(buf, "%d", &logical_port_id);
3184
3185         port = ehea_get_port(adapter, logical_port_id);
3186
3187         if (port) {
3188                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3189                             logical_port_id);
3190
3191                 ehea_shutdown_single_port(port);
3192
3193                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3194                         if (adapter->port[i] == port) {
3195                                 adapter->port[i] = NULL;
3196                                 break;
3197                         }
3198         } else {
3199                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3200                        logical_port_id);
3201                 return -EINVAL;
3202         }
3203
3204         ehea_remove_adapter_mr(adapter);
3205
3206         return (ssize_t) count;
3207 }
3208
3209 static DEVICE_ATTR_WO(probe_port);
3210 static DEVICE_ATTR_WO(remove_port);
3211
3212 static int ehea_create_device_sysfs(struct platform_device *dev)
3213 {
3214         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3215         if (ret)
3216                 goto out;
3217
3218         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3219 out:
3220         return ret;
3221 }
3222
3223 static void ehea_remove_device_sysfs(struct platform_device *dev)
3224 {
3225         device_remove_file(&dev->dev, &dev_attr_probe_port);
3226         device_remove_file(&dev->dev, &dev_attr_remove_port);
3227 }
3228
3229 static int ehea_reboot_notifier(struct notifier_block *nb,
3230                                 unsigned long action, void *unused)
3231 {
3232         if (action == SYS_RESTART) {
3233                 pr_info("Reboot: freeing all eHEA resources\n");
3234                 ibmebus_unregister_driver(&ehea_driver);
3235         }
3236         return NOTIFY_DONE;
3237 }
3238
3239 static struct notifier_block ehea_reboot_nb = {
3240         .notifier_call = ehea_reboot_notifier,
3241 };
3242
3243 static int ehea_mem_notifier(struct notifier_block *nb,
3244                              unsigned long action, void *data)
3245 {
3246         int ret = NOTIFY_BAD;
3247         struct memory_notify *arg = data;
3248
3249         mutex_lock(&dlpar_mem_lock);
3250
3251         switch (action) {
3252         case MEM_CANCEL_OFFLINE:
3253                 pr_info("memory offlining canceled");
3254                 fallthrough;    /* re-add canceled memory block */
3255
3256         case MEM_ONLINE:
3257                 pr_info("memory is going online");
3258                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3259                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3260                         goto out_unlock;
3261                 ehea_rereg_mrs();
3262                 break;
3263
3264         case MEM_GOING_OFFLINE:
3265                 pr_info("memory is going offline");
3266                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3267                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3268                         goto out_unlock;
3269                 ehea_rereg_mrs();
3270                 break;
3271
3272         default:
3273                 break;
3274         }
3275
3276         ehea_update_firmware_handles();
3277         ret = NOTIFY_OK;
3278
3279 out_unlock:
3280         mutex_unlock(&dlpar_mem_lock);
3281         return ret;
3282 }
3283
3284 static struct notifier_block ehea_mem_nb = {
3285         .notifier_call = ehea_mem_notifier,
3286 };
3287
3288 static void ehea_crash_handler(void)
3289 {
3290         int i;
3291
3292         if (ehea_fw_handles.arr)
3293                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3294                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3295                                              ehea_fw_handles.arr[i].fwh,
3296                                              FORCE_FREE);
3297
3298         if (ehea_bcmc_regs.arr)
3299                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3300                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3301                                               ehea_bcmc_regs.arr[i].port_id,
3302                                               ehea_bcmc_regs.arr[i].reg_type,
3303                                               ehea_bcmc_regs.arr[i].macaddr,
3304                                               0, H_DEREG_BCMC);
3305 }
3306
3307 static atomic_t ehea_memory_hooks_registered;
3308
3309 /* Register memory hooks on probe of first adapter */
3310 static int ehea_register_memory_hooks(void)
3311 {
3312         int ret = 0;
3313
3314         if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
3315                 return 0;
3316
3317         ret = ehea_create_busmap();
3318         if (ret) {
3319                 pr_info("ehea_create_busmap failed\n");
3320                 goto out;
3321         }
3322
3323         ret = register_reboot_notifier(&ehea_reboot_nb);
3324         if (ret) {
3325                 pr_info("register_reboot_notifier failed\n");
3326                 goto out;
3327         }
3328
3329         ret = register_memory_notifier(&ehea_mem_nb);
3330         if (ret) {
3331                 pr_info("register_memory_notifier failed\n");
3332                 goto out2;
3333         }
3334
3335         ret = crash_shutdown_register(ehea_crash_handler);
3336         if (ret) {
3337                 pr_info("crash_shutdown_register failed\n");
3338                 goto out3;
3339         }
3340
3341         return 0;
3342
3343 out3:
3344         unregister_memory_notifier(&ehea_mem_nb);
3345 out2:
3346         unregister_reboot_notifier(&ehea_reboot_nb);
3347 out:
3348         atomic_dec(&ehea_memory_hooks_registered);
3349         return ret;
3350 }
3351
3352 static void ehea_unregister_memory_hooks(void)
3353 {
3354         /* Only remove the hooks if we've registered them */
3355         if (atomic_read(&ehea_memory_hooks_registered) == 0)
3356                 return;
3357
3358         unregister_reboot_notifier(&ehea_reboot_nb);
3359         if (crash_shutdown_unregister(ehea_crash_handler))
3360                 pr_info("failed unregistering crash handler\n");
3361         unregister_memory_notifier(&ehea_mem_nb);
3362 }
3363
3364 static int ehea_probe_adapter(struct platform_device *dev)
3365 {
3366         struct ehea_adapter *adapter;
3367         const u64 *adapter_handle;
3368         int ret;
3369         int i;
3370
3371         ret = ehea_register_memory_hooks();
3372         if (ret)
3373                 return ret;
3374
3375         if (!dev || !dev->dev.of_node) {
3376                 pr_err("Invalid ibmebus device probed\n");
3377                 return -EINVAL;
3378         }
3379
3380         adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3381         if (!adapter) {
3382                 ret = -ENOMEM;
3383                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3384                 goto out;
3385         }
3386
3387         list_add(&adapter->list, &adapter_list);
3388
3389         adapter->ofdev = dev;
3390
3391         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3392                                          NULL);
3393         if (adapter_handle)
3394                 adapter->handle = *adapter_handle;
3395
3396         if (!adapter->handle) {
3397                 dev_err(&dev->dev, "failed getting handle for adapter"
3398                         " '%pOF'\n", dev->dev.of_node);
3399                 ret = -ENODEV;
3400                 goto out_free_ad;
3401         }
3402
3403         adapter->pd = EHEA_PD_ID;
3404
3405         platform_set_drvdata(dev, adapter);
3406
3407
3408         /* initialize adapter and ports */
3409         /* get adapter properties */
3410         ret = ehea_sense_adapter_attr(adapter);
3411         if (ret) {
3412                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3413                 goto out_free_ad;
3414         }
3415
3416         adapter->neq = ehea_create_eq(adapter,
3417                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3418         if (!adapter->neq) {
3419                 ret = -EIO;
3420                 dev_err(&dev->dev, "NEQ creation failed\n");
3421                 goto out_free_ad;
3422         }
3423
3424         tasklet_setup(&adapter->neq_tasklet, ehea_neq_tasklet);
3425
3426         ret = ehea_create_device_sysfs(dev);
3427         if (ret)
3428                 goto out_kill_eq;
3429
3430         ret = ehea_setup_ports(adapter);
3431         if (ret) {
3432                 dev_err(&dev->dev, "setup_ports failed\n");
3433                 goto out_rem_dev_sysfs;
3434         }
3435
3436         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3437                                   ehea_interrupt_neq, 0,
3438                                   "ehea_neq", adapter);
3439         if (ret) {
3440                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3441                 goto out_shutdown_ports;
3442         }
3443
3444         /* Handle any events that might be pending. */
3445         tasklet_hi_schedule(&adapter->neq_tasklet);
3446
3447         ret = 0;
3448         goto out;
3449
3450 out_shutdown_ports:
3451         for (i = 0; i < EHEA_MAX_PORTS; i++)
3452                 if (adapter->port[i]) {
3453                         ehea_shutdown_single_port(adapter->port[i]);
3454                         adapter->port[i] = NULL;
3455                 }
3456
3457 out_rem_dev_sysfs:
3458         ehea_remove_device_sysfs(dev);
3459
3460 out_kill_eq:
3461         ehea_destroy_eq(adapter->neq);
3462
3463 out_free_ad:
3464         list_del(&adapter->list);
3465
3466 out:
3467         ehea_update_firmware_handles();
3468
3469         return ret;
3470 }
3471
3472 static int ehea_remove(struct platform_device *dev)
3473 {
3474         struct ehea_adapter *adapter = platform_get_drvdata(dev);
3475         int i;
3476
3477         for (i = 0; i < EHEA_MAX_PORTS; i++)
3478                 if (adapter->port[i]) {
3479                         ehea_shutdown_single_port(adapter->port[i]);
3480                         adapter->port[i] = NULL;
3481                 }
3482
3483         ehea_remove_device_sysfs(dev);
3484
3485         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3486         tasklet_kill(&adapter->neq_tasklet);
3487
3488         ehea_destroy_eq(adapter->neq);
3489         ehea_remove_adapter_mr(adapter);
3490         list_del(&adapter->list);
3491
3492         ehea_update_firmware_handles();
3493
3494         return 0;
3495 }
3496
3497 static int check_module_parm(void)
3498 {
3499         int ret = 0;
3500
3501         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3502             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3503                 pr_info("Bad parameter: rq1_entries\n");
3504                 ret = -EINVAL;
3505         }
3506         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3507             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3508                 pr_info("Bad parameter: rq2_entries\n");
3509                 ret = -EINVAL;
3510         }
3511         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3512             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3513                 pr_info("Bad parameter: rq3_entries\n");
3514                 ret = -EINVAL;
3515         }
3516         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3517             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3518                 pr_info("Bad parameter: sq_entries\n");
3519                 ret = -EINVAL;
3520         }
3521
3522         return ret;
3523 }
3524
3525 static ssize_t capabilities_show(struct device_driver *drv, char *buf)
3526 {
3527         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3528 }
3529
3530 static DRIVER_ATTR_RO(capabilities);
3531
3532 static int __init ehea_module_init(void)
3533 {
3534         int ret;
3535
3536         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3537
3538         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3539         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3540
3541         mutex_init(&ehea_fw_handles.lock);
3542         spin_lock_init(&ehea_bcmc_regs.lock);
3543
3544         ret = check_module_parm();
3545         if (ret)
3546                 goto out;
3547
3548         ret = ibmebus_register_driver(&ehea_driver);
3549         if (ret) {
3550                 pr_err("failed registering eHEA device driver on ebus\n");
3551                 goto out;
3552         }
3553
3554         ret = driver_create_file(&ehea_driver.driver,
3555                                  &driver_attr_capabilities);
3556         if (ret) {
3557                 pr_err("failed to register capabilities attribute, ret=%d\n",
3558                        ret);
3559                 goto out2;
3560         }
3561
3562         return ret;
3563
3564 out2:
3565         ibmebus_unregister_driver(&ehea_driver);
3566 out:
3567         return ret;
3568 }
3569
3570 static void __exit ehea_module_exit(void)
3571 {
3572         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3573         ibmebus_unregister_driver(&ehea_driver);
3574         ehea_unregister_memory_hooks();
3575         kfree(ehea_fw_handles.arr);
3576         kfree(ehea_bcmc_regs.arr);
3577         ehea_destroy_busmap();
3578 }
3579
3580 module_init(ehea_module_init);
3581 module_exit(ehea_module_exit);