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

   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/in.h>
  32 #include <linux/ip.h>
  33 #include <linux/tcp.h>
  34 #include <linux/udp.h>
  35 #include <linux/if.h>
  36 #include <linux/list.h>
  37 #include <linux/slab.h>
  38 #include <linux/if_ether.h>
  39 #include <linux/notifier.h>
  40 #include <linux/reboot.h>
  41 #include <linux/memory.h>
  42 #include <asm/kexec.h>
  43 #include <linux/mutex.h>
  44 #include <linux/prefetch.h>
  45
  46 #include <net/ip.h>
  47
  48 #include "ehea.h"
  49 #include "ehea_qmr.h"
  50 #include "ehea_phyp.h"
  51
  52
  53 MODULE_LICENSE("GPL");
  54 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  55 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  56 MODULE_VERSION(DRV_VERSION);
  57
  58
  59 static int msg_level = -1;
  60 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  61 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  62 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  63 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  64 static int use_mcs = 1;
  65 static int use_lro;
  66 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  67 static int prop_carrier_state;
  68
  69 module_param(msg_level, int, 0);
  70 module_param(rq1_entries, int, 0);
  71 module_param(rq2_entries, int, 0);
  72 module_param(rq3_entries, int, 0);
  73 module_param(sq_entries, int, 0);
  74 module_param(prop_carrier_state, int, 0);
  75 module_param(use_mcs, int, 0);
  76 module_param(use_lro, int, 0);
  77 module_param(lro_max_aggr, int, 0);
  78
  79 MODULE_PARM_DESC(msg_level, "msg_level");
  80 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  81                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  82 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  83                  "[2^x - 1], x = [6..14]. Default = "
  84                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  85 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  86                  "[2^x - 1], x = [6..14]. Default = "
  87                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  88 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  89                  "[2^x - 1], x = [6..14]. Default = "
  90                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  91 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  92                  "[2^x - 1], x = [6..14]. Default = "
  93                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  94 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  95                  "Default = 1");
  96
  97 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
  98                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
  99 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
 100                  "Default = 0");
 101
 102 static int port_name_cnt;
 103 static LIST_HEAD(adapter_list);
 104 static unsigned long ehea_driver_flags;
 105 static DEFINE_MUTEX(dlpar_mem_lock);
 106 struct ehea_fw_handle_array ehea_fw_handles;
 107 struct ehea_bcmc_reg_array ehea_bcmc_regs;
 108
 109
 110 static int __devinit ehea_probe_adapter(struct platform_device *dev,
 111                                         const struct of_device_id *id);
 112
 113 static int __devexit ehea_remove(struct platform_device *dev);
 114
 115 static struct of_device_id ehea_device_table[] = {
 116         {
 117                 .name = "lhea",
 118                 .compatible = "IBM,lhea",
 119         },
 120         {},
 121 };
 122 MODULE_DEVICE_TABLE(of, ehea_device_table);
 123
 124 static struct of_platform_driver ehea_driver = {
 125         .driver = {
 126                 .name = "ehea",
 127                 .owner = THIS_MODULE,
 128                 .of_match_table = ehea_device_table,
 129         },
 130         .probe = ehea_probe_adapter,
 131         .remove = ehea_remove,
 132 };
 133
 134 void ehea_dump(void *adr, int len, char *msg)
 135 {
 136         int x;
 137         unsigned char *deb = adr;
 138         for (x = 0; x < len; x += 16) {
 139                 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 140                         msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 141                 deb += 16;
 142         }
 143 }
 144
 145 void ehea_schedule_port_reset(struct ehea_port *port)
 146 {
 147         if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 148                 schedule_work(&port->reset_task);
 149 }
 150
 151 static void ehea_update_firmware_handles(void)
 152 {
 153         struct ehea_fw_handle_entry *arr = NULL;
 154         struct ehea_adapter *adapter;
 155         int num_adapters = 0;
 156         int num_ports = 0;
 157         int num_portres = 0;
 158         int i = 0;
 159         int num_fw_handles, k, l;
 160
 161         /* Determine number of handles */
 162         mutex_lock(&ehea_fw_handles.lock);
 163
 164         list_for_each_entry(adapter, &adapter_list, list) {
 165                 num_adapters++;
 166
 167                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 168                         struct ehea_port *port = adapter->port[k];
 169
 170                         if (!port || (port->state != EHEA_PORT_UP))
 171                                 continue;
 172
 173                         num_ports++;
 174                         num_portres += port->num_def_qps;
 175                 }
 176         }
 177
 178         num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 179                          num_ports * EHEA_NUM_PORT_FW_HANDLES +
 180                          num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 181
 182         if (num_fw_handles) {
 183                 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 184                 if (!arr)
 185                         goto out;  /* Keep the existing array */
 186         } else
 187                 goto out_update;
 188
 189         list_for_each_entry(adapter, &adapter_list, list) {
 190                 if (num_adapters == 0)
 191                         break;
 192
 193                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 194                         struct ehea_port *port = adapter->port[k];
 195
 196                         if (!port || (port->state != EHEA_PORT_UP) ||
 197                             (num_ports == 0))
 198                                 continue;
 199
 200                         for (l = 0; l < port->num_def_qps; l++) {
 201                                 struct ehea_port_res *pr = &port->port_res[l];
 202
 203                                 arr[i].adh = adapter->handle;
 204                                 arr[i++].fwh = pr->qp->fw_handle;
 205                                 arr[i].adh = adapter->handle;
 206                                 arr[i++].fwh = pr->send_cq->fw_handle;
 207                                 arr[i].adh = adapter->handle;
 208                                 arr[i++].fwh = pr->recv_cq->fw_handle;
 209                                 arr[i].adh = adapter->handle;
 210                                 arr[i++].fwh = pr->eq->fw_handle;
 211                                 arr[i].adh = adapter->handle;
 212                                 arr[i++].fwh = pr->send_mr.handle;
 213                                 arr[i].adh = adapter->handle;
 214                                 arr[i++].fwh = pr->recv_mr.handle;
 215                         }
 216                         arr[i].adh = adapter->handle;
 217                         arr[i++].fwh = port->qp_eq->fw_handle;
 218                         num_ports--;
 219                 }
 220
 221                 arr[i].adh = adapter->handle;
 222                 arr[i++].fwh = adapter->neq->fw_handle;
 223
 224                 if (adapter->mr.handle) {
 225                         arr[i].adh = adapter->handle;
 226                         arr[i++].fwh = adapter->mr.handle;
 227                 }
 228                 num_adapters--;
 229         }
 230
 231 out_update:
 232         kfree(ehea_fw_handles.arr);
 233         ehea_fw_handles.arr = arr;
 234         ehea_fw_handles.num_entries = i;
 235 out:
 236         mutex_unlock(&ehea_fw_handles.lock);
 237 }
 238
 239 static void ehea_update_bcmc_registrations(void)
 240 {
 241         unsigned long flags;
 242         struct ehea_bcmc_reg_entry *arr = NULL;
 243         struct ehea_adapter *adapter;
 244         struct ehea_mc_list *mc_entry;
 245         int num_registrations = 0;
 246         int i = 0;
 247         int k;
 248
 249         spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 250
 251         /* Determine number of registrations */
 252         list_for_each_entry(adapter, &adapter_list, list)
 253                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 254                         struct ehea_port *port = adapter->port[k];
 255
 256                         if (!port || (port->state != EHEA_PORT_UP))
 257                                 continue;
 258
 259                         num_registrations += 2; /* Broadcast registrations */
 260
 261                         list_for_each_entry(mc_entry, &port->mc_list->list,list)
 262                                 num_registrations += 2;
 263                 }
 264
 265         if (num_registrations) {
 266                 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 267                 if (!arr)
 268                         goto out;  /* Keep the existing array */
 269         } else
 270                 goto out_update;
 271
 272         list_for_each_entry(adapter, &adapter_list, list) {
 273                 for (k = 0; k < EHEA_MAX_PORTS; k++) {
 274                         struct ehea_port *port = adapter->port[k];
 275
 276                         if (!port || (port->state != EHEA_PORT_UP))
 277                                 continue;
 278
 279                         if (num_registrations == 0)
 280                                 goto out_update;
 281
 282                         arr[i].adh = adapter->handle;
 283                         arr[i].port_id = port->logical_port_id;
 284                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 285                                           EHEA_BCMC_UNTAGGED;
 286                         arr[i++].macaddr = port->mac_addr;
 287
 288                         arr[i].adh = adapter->handle;
 289                         arr[i].port_id = port->logical_port_id;
 290                         arr[i].reg_type = EHEA_BCMC_BROADCAST |
 291                                           EHEA_BCMC_VLANID_ALL;
 292                         arr[i++].macaddr = port->mac_addr;
 293                         num_registrations -= 2;
 294
 295                         list_for_each_entry(mc_entry,
 296                                             &port->mc_list->list, list) {
 297                                 if (num_registrations == 0)
 298                                         goto out_update;
 299
 300                                 arr[i].adh = adapter->handle;
 301                                 arr[i].port_id = port->logical_port_id;
 302                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 303                                                   EHEA_BCMC_MULTICAST |
 304                                                   EHEA_BCMC_UNTAGGED;
 305                                 arr[i++].macaddr = mc_entry->macaddr;
 306
 307                                 arr[i].adh = adapter->handle;
 308                                 arr[i].port_id = port->logical_port_id;
 309                                 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL |
 310                                                   EHEA_BCMC_MULTICAST |
 311                                                   EHEA_BCMC_VLANID_ALL;
 312                                 arr[i++].macaddr = mc_entry->macaddr;
 313                                 num_registrations -= 2;
 314                         }
 315                 }
 316         }
 317
 318 out_update:
 319         kfree(ehea_bcmc_regs.arr);
 320         ehea_bcmc_regs.arr = arr;
 321         ehea_bcmc_regs.num_entries = i;
 322 out:
 323         spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 324 }
 325
 326 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 327 {
 328         struct ehea_port *port = netdev_priv(dev);
 329         struct net_device_stats *stats = &port->stats;
 330         u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 331         int i;
 332
 333         for (i = 0; i < port->num_def_qps; i++) {
 334                 rx_packets += port->port_res[i].rx_packets;
 335                 rx_bytes   += port->port_res[i].rx_bytes;
 336         }
 337
 338         for (i = 0; i < port->num_def_qps; i++) {
 339                 tx_packets += port->port_res[i].tx_packets;
 340                 tx_bytes   += port->port_res[i].tx_bytes;
 341         }
 342
 343         stats->tx_packets = tx_packets;
 344         stats->rx_bytes = rx_bytes;
 345         stats->tx_bytes = tx_bytes;
 346         stats->rx_packets = rx_packets;
 347
 348         return &port->stats;
 349 }
 350
 351 static void ehea_update_stats(struct work_struct *work)
 352 {
 353         struct ehea_port *port =
 354                 container_of(work, struct ehea_port, stats_work.work);
 355         struct net_device *dev = port->netdev;
 356         struct net_device_stats *stats = &port->stats;
 357         struct hcp_ehea_port_cb2 *cb2;
 358         u64 hret;
 359
 360         cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 361         if (!cb2) {
 362                 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 363                 goto resched;
 364         }
 365
 366         hret = ehea_h_query_ehea_port(port->adapter->handle,
 367                                       port->logical_port_id,
 368                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 369         if (hret != H_SUCCESS) {
 370                 netdev_err(dev, "query_ehea_port failed\n");
 371                 goto out_herr;
 372         }
 373
 374         if (netif_msg_hw(port))
 375                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 376
 377         stats->multicast = cb2->rxmcp;
 378         stats->rx_errors = cb2->rxuerr;
 379
 380 out_herr:
 381         free_page((unsigned long)cb2);
 382 resched:
 383         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
 384 }
 385
 386 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 387 {
 388         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 389         struct net_device *dev = pr->port->netdev;
 390         int max_index_mask = pr->rq1_skba.len - 1;
 391         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 392         int adder = 0;
 393         int i;
 394
 395         pr->rq1_skba.os_skbs = 0;
 396
 397         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 398                 if (nr_of_wqes > 0)
 399                         pr->rq1_skba.index = index;
 400                 pr->rq1_skba.os_skbs = fill_wqes;
 401                 return;
 402         }
 403
 404         for (i = 0; i < fill_wqes; i++) {
 405                 if (!skb_arr_rq1[index]) {
 406                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 407                                                               EHEA_L_PKT_SIZE);
 408                         if (!skb_arr_rq1[index]) {
 409                                 netdev_info(dev, "Unable to allocate enough skb in the array\n");
 410                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 411                                 break;
 412                         }
 413                 }
 414                 index--;
 415                 index &= max_index_mask;
 416                 adder++;
 417         }
 418
 419         if (adder == 0)
 420                 return;
 421
 422         /* Ring doorbell */
 423         ehea_update_rq1a(pr->qp, adder);
 424 }
 425
 426 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 427 {
 428         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 429         struct net_device *dev = pr->port->netdev;
 430         int i;
 431
 432         if (nr_rq1a > pr->rq1_skba.len) {
 433                 netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 434                 return;
 435         }
 436
 437         for (i = 0; i < nr_rq1a; i++) {
 438                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 439                 if (!skb_arr_rq1[i]) {
 440                         netdev_info(dev, "Not enough memory to allocate skb array\n");
 441                         break;
 442                 }
 443         }
 444         /* Ring doorbell */
 445         ehea_update_rq1a(pr->qp, i - 1);
 446 }
 447
 448 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 449                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 450                               int num_wqes, int wqe_type, int packet_size)
 451 {
 452         struct net_device *dev = pr->port->netdev;
 453         struct ehea_qp *qp = pr->qp;
 454         struct sk_buff **skb_arr = q_skba->arr;
 455         struct ehea_rwqe *rwqe;
 456         int i, index, max_index_mask, fill_wqes;
 457         int adder = 0;
 458         int ret = 0;
 459
 460         fill_wqes = q_skba->os_skbs + num_wqes;
 461         q_skba->os_skbs = 0;
 462
 463         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 464                 q_skba->os_skbs = fill_wqes;
 465                 return ret;
 466         }
 467
 468         index = q_skba->index;
 469         max_index_mask = q_skba->len - 1;
 470         for (i = 0; i < fill_wqes; i++) {
 471                 u64 tmp_addr;
 472                 struct sk_buff *skb;
 473
 474                 skb = netdev_alloc_skb_ip_align(dev, packet_size);
 475                 if (!skb) {
 476                         q_skba->os_skbs = fill_wqes - i;
 477                         if (q_skba->os_skbs == q_skba->len - 2) {
 478                                 netdev_info(pr->port->netdev,
 479                                             "rq%i ran dry - no mem for skb\n",
 480                                             rq_nr);
 481                                 ret = -ENOMEM;
 482                         }
 483                         break;
 484                 }
 485
 486                 skb_arr[index] = skb;
 487                 tmp_addr = ehea_map_vaddr(skb->data);
 488                 if (tmp_addr == -1) {
 489                         dev_kfree_skb(skb);
 490                         q_skba->os_skbs = fill_wqes - i;
 491                         ret = 0;
 492                         break;
 493                 }
 494
 495                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 496                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 497                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 498                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 499                 rwqe->sg_list[0].vaddr = tmp_addr;
 500                 rwqe->sg_list[0].len = packet_size;
 501                 rwqe->data_segments = 1;
 502
 503                 index++;
 504                 index &= max_index_mask;
 505                 adder++;
 506         }
 507
 508         q_skba->index = index;
 509         if (adder == 0)
 510                 goto out;
 511
 512         /* Ring doorbell */
 513         iosync();
 514         if (rq_nr == 2)
 515                 ehea_update_rq2a(pr->qp, adder);
 516         else
 517                 ehea_update_rq3a(pr->qp, adder);
 518 out:
 519         return ret;
 520 }
 521
 522
 523 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 524 {
 525         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 526                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 527                                   EHEA_RQ2_PKT_SIZE);
 528 }
 529
 530
 531 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 532 {
 533         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 534                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 535                                   EHEA_MAX_PACKET_SIZE);
 536 }
 537
 538 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 539 {
 540         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 541         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 542                 return 0;
 543         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 544             (cqe->header_length == 0))
 545                 return 0;
 546         return -EINVAL;
 547 }
 548
 549 static inline void ehea_fill_skb(struct net_device *dev,
 550                                  struct sk_buff *skb, struct ehea_cqe *cqe,
 551                                  struct ehea_port_res *pr)
 552 {
 553         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 554
 555         skb_put(skb, length);
 556         skb->protocol = eth_type_trans(skb, dev);
 557
 558         /* The packet was not an IPV4 packet so a complemented checksum was
 559            calculated. The value is found in the Internet Checksum field. */
 560         if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 561                 skb->ip_summed = CHECKSUM_COMPLETE;
 562                 skb->csum = csum_unfold(~cqe->inet_checksum_value);
 563         } else
 564                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 565
 566         skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 567 }
 568
 569 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 570                                                int arr_len,
 571                                                struct ehea_cqe *cqe)
 572 {
 573         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 574         struct sk_buff *skb;
 575         void *pref;
 576         int x;
 577
 578         x = skb_index + 1;
 579         x &= (arr_len - 1);
 580
 581         pref = skb_array[x];
 582         if (pref) {
 583                 prefetchw(pref);
 584                 prefetchw(pref + EHEA_CACHE_LINE);
 585
 586                 pref = (skb_array[x]->data);
 587                 prefetch(pref);
 588                 prefetch(pref + EHEA_CACHE_LINE);
 589                 prefetch(pref + EHEA_CACHE_LINE * 2);
 590                 prefetch(pref + EHEA_CACHE_LINE * 3);
 591         }
 592
 593         skb = skb_array[skb_index];
 594         skb_array[skb_index] = NULL;
 595         return skb;
 596 }
 597
 598 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 599                                                   int arr_len, int wqe_index)
 600 {
 601         struct sk_buff *skb;
 602         void *pref;
 603         int x;
 604
 605         x = wqe_index + 1;
 606         x &= (arr_len - 1);
 607
 608         pref = skb_array[x];
 609         if (pref) {
 610                 prefetchw(pref);
 611                 prefetchw(pref + EHEA_CACHE_LINE);
 612
 613                 pref = (skb_array[x]->data);
 614                 prefetchw(pref);
 615                 prefetchw(pref + EHEA_CACHE_LINE);
 616         }
 617
 618         skb = skb_array[wqe_index];
 619         skb_array[wqe_index] = NULL;
 620         return skb;
 621 }
 622
 623 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 624                                  struct ehea_cqe *cqe, int *processed_rq2,
 625                                  int *processed_rq3)
 626 {
 627         struct sk_buff *skb;
 628
 629         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 630                 pr->p_stats.err_tcp_cksum++;
 631         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 632                 pr->p_stats.err_ip_cksum++;
 633         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 634                 pr->p_stats.err_frame_crc++;
 635
 636         if (rq == 2) {
 637                 *processed_rq2 += 1;
 638                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 639                 dev_kfree_skb(skb);
 640         } else if (rq == 3) {
 641                 *processed_rq3 += 1;
 642                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 643                 dev_kfree_skb(skb);
 644         }
 645
 646         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 647                 if (netif_msg_rx_err(pr->port)) {
 648                         pr_err("Critical receive error for QP %d. Resetting port.\n",
 649                                pr->qp->init_attr.qp_nr);
 650                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 651                 }
 652                 ehea_schedule_port_reset(pr->port);
 653                 return 1;
 654         }
 655
 656         return 0;
 657 }
 658
 659 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 660                        void **tcph, u64 *hdr_flags, void *priv)
 661 {
 662         struct ehea_cqe *cqe = priv;
 663         unsigned int ip_len;
 664         struct iphdr *iph;
 665
 666         /* non tcp/udp packets */
 667         if (!cqe->header_length)
 668                 return -1;
 669
 670         /* non tcp packet */
 671         skb_reset_network_header(skb);
 672         iph = ip_hdr(skb);
 673         if (iph->protocol != IPPROTO_TCP)
 674                 return -1;
 675
 676         ip_len = ip_hdrlen(skb);
 677         skb_set_transport_header(skb, ip_len);
 678         *tcph = tcp_hdr(skb);
 679
 680         /* check if ip header and tcp header are complete */
 681         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
 682                 return -1;
 683
 684         *hdr_flags = LRO_IPV4 | LRO_TCP;
 685         *iphdr = iph;
 686
 687         return 0;
 688 }
 689
 690 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 691                           struct sk_buff *skb)
 692 {
 693         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 694                 __vlan_hwaccel_put_tag(skb, cqe->vlan_tag);
 695
 696         if (skb->dev->features & NETIF_F_LRO)
 697                 lro_receive_skb(&pr->lro_mgr, skb, cqe);
 698         else
 699                 netif_receive_skb(skb);
 700 }
 701
 702 static int ehea_proc_rwqes(struct net_device *dev,
 703                            struct ehea_port_res *pr,
 704                            int budget)
 705 {
 706         struct ehea_port *port = pr->port;
 707         struct ehea_qp *qp = pr->qp;
 708         struct ehea_cqe *cqe;
 709         struct sk_buff *skb;
 710         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 711         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 712         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 713         int skb_arr_rq1_len = pr->rq1_skba.len;
 714         int skb_arr_rq2_len = pr->rq2_skba.len;
 715         int skb_arr_rq3_len = pr->rq3_skba.len;
 716         int processed, processed_rq1, processed_rq2, processed_rq3;
 717         u64 processed_bytes = 0;
 718         int wqe_index, last_wqe_index, rq, port_reset;
 719
 720         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 721         last_wqe_index = 0;
 722
 723         cqe = ehea_poll_rq1(qp, &wqe_index);
 724         while ((processed < budget) && cqe) {
 725                 ehea_inc_rq1(qp);
 726                 processed_rq1++;
 727                 processed++;
 728                 if (netif_msg_rx_status(port))
 729                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 730
 731                 last_wqe_index = wqe_index;
 732                 rmb();
 733                 if (!ehea_check_cqe(cqe, &rq)) {
 734                         if (rq == 1) {
 735                                 /* LL RQ1 */
 736                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 737                                                           skb_arr_rq1_len,
 738                                                           wqe_index);
 739                                 if (unlikely(!skb)) {
 740                                         netif_info(port, rx_err, dev,
 741                                                   "LL rq1: skb=NULL\n");
 742
 743                                         skb = netdev_alloc_skb(dev,
 744                                                                EHEA_L_PKT_SIZE);
 745                                         if (!skb) {
 746                                                 netdev_err(dev, "Not enough memory to allocate skb\n");
 747                                                 break;
 748                                         }
 749                                 }
 750                                 skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 751                                                  cqe->num_bytes_transfered - 4);
 752                                 ehea_fill_skb(dev, skb, cqe, pr);
 753                         } else if (rq == 2) {
 754                                 /* RQ2 */
 755                                 skb = get_skb_by_index(skb_arr_rq2,
 756                                                        skb_arr_rq2_len, cqe);
 757                                 if (unlikely(!skb)) {
 758                                         netif_err(port, rx_err, dev,
 759                                                   "rq2: skb=NULL\n");
 760                                         break;
 761                                 }
 762                                 ehea_fill_skb(dev, skb, cqe, pr);
 763                                 processed_rq2++;
 764                         } else {
 765                                 /* RQ3 */
 766                                 skb = get_skb_by_index(skb_arr_rq3,
 767                                                        skb_arr_rq3_len, cqe);
 768                                 if (unlikely(!skb)) {
 769                                         netif_err(port, rx_err, dev,
 770                                                   "rq3: skb=NULL\n");
 771                                         break;
 772                                 }
 773                                 ehea_fill_skb(dev, skb, cqe, pr);
 774                                 processed_rq3++;
 775                         }
 776
 777                         processed_bytes += skb->len;
 778                         ehea_proc_skb(pr, cqe, skb);
 779                 } else {
 780                         pr->p_stats.poll_receive_errors++;
 781                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 782                                                            &processed_rq2,
 783                                                            &processed_rq3);
 784                         if (port_reset)
 785                                 break;
 786                 }
 787                 cqe = ehea_poll_rq1(qp, &wqe_index);
 788         }
 789         if (dev->features & NETIF_F_LRO)
 790                 lro_flush_all(&pr->lro_mgr);
 791
 792         pr->rx_packets += processed;
 793         pr->rx_bytes += processed_bytes;
 794
 795         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 796         ehea_refill_rq2(pr, processed_rq2);
 797         ehea_refill_rq3(pr, processed_rq3);
 798
 799         return processed;
 800 }
 801
 802 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 803
 804 static void reset_sq_restart_flag(struct ehea_port *port)
 805 {
 806         int i;
 807
 808         for (i = 0; i < port->num_def_qps; i++) {
 809                 struct ehea_port_res *pr = &port->port_res[i];
 810                 pr->sq_restart_flag = 0;
 811         }
 812         wake_up(&port->restart_wq);
 813 }
 814
 815 static void check_sqs(struct ehea_port *port)
 816 {
 817         struct ehea_swqe *swqe;
 818         int swqe_index;
 819         int i, k;
 820
 821         for (i = 0; i < port->num_def_qps; i++) {
 822                 struct ehea_port_res *pr = &port->port_res[i];
 823                 int ret;
 824                 k = 0;
 825                 swqe = ehea_get_swqe(pr->qp, &swqe_index);
 826                 memset(swqe, 0, SWQE_HEADER_SIZE);
 827                 atomic_dec(&pr->swqe_avail);
 828
 829                 swqe->tx_control |= EHEA_SWQE_PURGE;
 830                 swqe->wr_id = SWQE_RESTART_CHECK;
 831                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 832                 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 833                 swqe->immediate_data_length = 80;
 834
 835                 ehea_post_swqe(pr->qp, swqe);
 836
 837                 ret = wait_event_timeout(port->restart_wq,
 838                                          pr->sq_restart_flag == 0,
 839                                          msecs_to_jiffies(100));
 840
 841                 if (!ret) {
 842                         pr_err("HW/SW queues out of sync\n");
 843                         ehea_schedule_port_reset(pr->port);
 844                         return;
 845                 }
 846         }
 847 }
 848
 849
 850 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 851 {
 852         struct sk_buff *skb;
 853         struct ehea_cq *send_cq = pr->send_cq;
 854         struct ehea_cqe *cqe;
 855         int quota = my_quota;
 856         int cqe_counter = 0;
 857         int swqe_av = 0;
 858         int index;
 859         struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 860                                                 pr - &pr->port->port_res[0]);
 861
 862         cqe = ehea_poll_cq(send_cq);
 863         while (cqe && (quota > 0)) {
 864                 ehea_inc_cq(send_cq);
 865
 866                 cqe_counter++;
 867                 rmb();
 868
 869                 if (cqe->wr_id == SWQE_RESTART_CHECK) {
 870                         pr->sq_restart_flag = 1;
 871                         swqe_av++;
 872                         break;
 873                 }
 874
 875                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 876                         pr_err("Bad send completion status=0x%04X\n",
 877                                cqe->status);
 878
 879                         if (netif_msg_tx_err(pr->port))
 880                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 881
 882                         if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 883                                 pr_err("Resetting port\n");
 884                                 ehea_schedule_port_reset(pr->port);
 885                                 break;
 886                         }
 887                 }
 888
 889                 if (netif_msg_tx_done(pr->port))
 890                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 891
 892                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 893                            == EHEA_SWQE2_TYPE)) {
 894
 895                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 896                         skb = pr->sq_skba.arr[index];
 897                         dev_kfree_skb(skb);
 898                         pr->sq_skba.arr[index] = NULL;
 899                 }
 900
 901                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 902                 quota--;
 903
 904                 cqe = ehea_poll_cq(send_cq);
 905         }
 906
 907         ehea_update_feca(send_cq, cqe_counter);
 908         atomic_add(swqe_av, &pr->swqe_avail);
 909
 910         if (unlikely(netif_tx_queue_stopped(txq) &&
 911                      (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 912                 __netif_tx_lock(txq, smp_processor_id());
 913                 if (netif_tx_queue_stopped(txq) &&
 914                     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 915                         netif_tx_wake_queue(txq);
 916                 __netif_tx_unlock(txq);
 917         }
 918
 919         wake_up(&pr->port->swqe_avail_wq);
 920
 921         return cqe;
 922 }
 923
 924 #define EHEA_POLL_MAX_CQES 65535
 925
 926 static int ehea_poll(struct napi_struct *napi, int budget)
 927 {
 928         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 929                                                 napi);
 930         struct net_device *dev = pr->port->netdev;
 931         struct ehea_cqe *cqe;
 932         struct ehea_cqe *cqe_skb = NULL;
 933         int wqe_index;
 934         int rx = 0;
 935
 936         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 937         rx += ehea_proc_rwqes(dev, pr, budget - rx);
 938
 939         while (rx != budget) {
 940                 napi_complete(napi);
 941                 ehea_reset_cq_ep(pr->recv_cq);
 942                 ehea_reset_cq_ep(pr->send_cq);
 943                 ehea_reset_cq_n1(pr->recv_cq);
 944                 ehea_reset_cq_n1(pr->send_cq);
 945                 rmb();
 946                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 947                 cqe_skb = ehea_poll_cq(pr->send_cq);
 948
 949                 if (!cqe && !cqe_skb)
 950                         return rx;
 951
 952                 if (!napi_reschedule(napi))
 953                         return rx;
 954
 955                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 956                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 957         }
 958
 959         return rx;
 960 }
 961
 962 #ifdef CONFIG_NET_POLL_CONTROLLER
 963 static void ehea_netpoll(struct net_device *dev)
 964 {
 965         struct ehea_port *port = netdev_priv(dev);
 966         int i;
 967
 968         for (i = 0; i < port->num_def_qps; i++)
 969                 napi_schedule(&port->port_res[i].napi);
 970 }
 971 #endif
 972
 973 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 974 {
 975         struct ehea_port_res *pr = param;
 976
 977         napi_schedule(&pr->napi);
 978
 979         return IRQ_HANDLED;
 980 }
 981
 982 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 983 {
 984         struct ehea_port *port = param;
 985         struct ehea_eqe *eqe;
 986         struct ehea_qp *qp;
 987         u32 qp_token;
 988         u64 resource_type, aer, aerr;
 989         int reset_port = 0;
 990
 991         eqe = ehea_poll_eq(port->qp_eq);
 992
 993         while (eqe) {
 994                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 995                 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 996                        eqe->entry, qp_token);
 997
 998                 qp = port->port_res[qp_token].qp;
 999
1000                 resource_type = ehea_error_data(port->adapter, qp->fw_handle,
1001                                                 &aer, &aerr);
1002
1003                 if (resource_type == EHEA_AER_RESTYPE_QP) {
1004                         if ((aer & EHEA_AER_RESET_MASK) ||
1005                             (aerr & EHEA_AERR_RESET_MASK))
1006                                  reset_port = 1;
1007                 } else
1008                         reset_port = 1;   /* Reset in case of CQ or EQ error */
1009
1010                 eqe = ehea_poll_eq(port->qp_eq);
1011         }
1012
1013         if (reset_port) {
1014                 pr_err("Resetting port\n");
1015                 ehea_schedule_port_reset(port);
1016         }
1017
1018         return IRQ_HANDLED;
1019 }
1020
1021 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
1022                                        int logical_port)
1023 {
1024         int i;
1025
1026         for (i = 0; i < EHEA_MAX_PORTS; i++)
1027                 if (adapter->port[i])
1028                         if (adapter->port[i]->logical_port_id == logical_port)
1029                                 return adapter->port[i];
1030         return NULL;
1031 }
1032
1033 int ehea_sense_port_attr(struct ehea_port *port)
1034 {
1035         int ret;
1036         u64 hret;
1037         struct hcp_ehea_port_cb0 *cb0;
1038
1039         /* may be called via ehea_neq_tasklet() */
1040         cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1041         if (!cb0) {
1042                 pr_err("no mem for cb0\n");
1043                 ret = -ENOMEM;
1044                 goto out;
1045         }
1046
1047         hret = ehea_h_query_ehea_port(port->adapter->handle,
1048                                       port->logical_port_id, H_PORT_CB0,
1049                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1050                                       cb0);
1051         if (hret != H_SUCCESS) {
1052                 ret = -EIO;
1053                 goto out_free;
1054         }
1055
1056         /* MAC address */
1057         port->mac_addr = cb0->port_mac_addr << 16;
1058
1059         if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1060                 ret = -EADDRNOTAVAIL;
1061                 goto out_free;
1062         }
1063
1064         /* Port speed */
1065         switch (cb0->port_speed) {
1066         case H_SPEED_10M_H:
1067                 port->port_speed = EHEA_SPEED_10M;
1068                 port->full_duplex = 0;
1069                 break;
1070         case H_SPEED_10M_F:
1071                 port->port_speed = EHEA_SPEED_10M;
1072                 port->full_duplex = 1;
1073                 break;
1074         case H_SPEED_100M_H:
1075                 port->port_speed = EHEA_SPEED_100M;
1076                 port->full_duplex = 0;
1077                 break;
1078         case H_SPEED_100M_F:
1079                 port->port_speed = EHEA_SPEED_100M;
1080                 port->full_duplex = 1;
1081                 break;
1082         case H_SPEED_1G_F:
1083                 port->port_speed = EHEA_SPEED_1G;
1084                 port->full_duplex = 1;
1085                 break;
1086         case H_SPEED_10G_F:
1087                 port->port_speed = EHEA_SPEED_10G;
1088                 port->full_duplex = 1;
1089                 break;
1090         default:
1091                 port->port_speed = 0;
1092                 port->full_duplex = 0;
1093                 break;
1094         }
1095
1096         port->autoneg = 1;
1097         port->num_mcs = cb0->num_default_qps;
1098
1099         /* Number of default QPs */
1100         if (use_mcs)
1101                 port->num_def_qps = cb0->num_default_qps;
1102         else
1103                 port->num_def_qps = 1;
1104
1105         if (!port->num_def_qps) {
1106                 ret = -EINVAL;
1107                 goto out_free;
1108         }
1109
1110         ret = 0;
1111 out_free:
1112         if (ret || netif_msg_probe(port))
1113                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1114         free_page((unsigned long)cb0);
1115 out:
1116         return ret;
1117 }
1118
1119 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1120 {
1121         struct hcp_ehea_port_cb4 *cb4;
1122         u64 hret;
1123         int ret = 0;
1124
1125         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1126         if (!cb4) {
1127                 pr_err("no mem for cb4\n");
1128                 ret = -ENOMEM;
1129                 goto out;
1130         }
1131
1132         cb4->port_speed = port_speed;
1133
1134         netif_carrier_off(port->netdev);
1135
1136         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1137                                        port->logical_port_id,
1138                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1139         if (hret == H_SUCCESS) {
1140                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1141
1142                 hret = ehea_h_query_ehea_port(port->adapter->handle,
1143                                               port->logical_port_id,
1144                                               H_PORT_CB4, H_PORT_CB4_SPEED,
1145                                               cb4);
1146                 if (hret == H_SUCCESS) {
1147                         switch (cb4->port_speed) {
1148                         case H_SPEED_10M_H:
1149                                 port->port_speed = EHEA_SPEED_10M;
1150                                 port->full_duplex = 0;
1151                                 break;
1152                         case H_SPEED_10M_F:
1153                                 port->port_speed = EHEA_SPEED_10M;
1154                                 port->full_duplex = 1;
1155                                 break;
1156                         case H_SPEED_100M_H:
1157                                 port->port_speed = EHEA_SPEED_100M;
1158                                 port->full_duplex = 0;
1159                                 break;
1160                         case H_SPEED_100M_F:
1161                                 port->port_speed = EHEA_SPEED_100M;
1162                                 port->full_duplex = 1;
1163                                 break;
1164                         case H_SPEED_1G_F:
1165                                 port->port_speed = EHEA_SPEED_1G;
1166                                 port->full_duplex = 1;
1167                                 break;
1168                         case H_SPEED_10G_F:
1169                                 port->port_speed = EHEA_SPEED_10G;
1170                                 port->full_duplex = 1;
1171                                 break;
1172                         default:
1173                                 port->port_speed = 0;
1174                                 port->full_duplex = 0;
1175                                 break;
1176                         }
1177                 } else {
1178                         pr_err("Failed sensing port speed\n");
1179                         ret = -EIO;
1180                 }
1181         } else {
1182                 if (hret == H_AUTHORITY) {
1183                         pr_info("Hypervisor denied setting port speed\n");
1184                         ret = -EPERM;
1185                 } else {
1186                         ret = -EIO;
1187                         pr_err("Failed setting port speed\n");
1188                 }
1189         }
1190         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1191                 netif_carrier_on(port->netdev);
1192
1193         free_page((unsigned long)cb4);
1194 out:
1195         return ret;
1196 }
1197
1198 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1199 {
1200         int ret;
1201         u8 ec;
1202         u8 portnum;
1203         struct ehea_port *port;
1204         struct net_device *dev;
1205
1206         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1207         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1208         port = ehea_get_port(adapter, portnum);
1209         dev = port->netdev;
1210
1211         switch (ec) {
1212         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
1213
1214                 if (!port) {
1215                         netdev_err(dev, "unknown portnum %x\n", portnum);
1216                         break;
1217                 }
1218
1219                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1220                         if (!netif_carrier_ok(dev)) {
1221                                 ret = ehea_sense_port_attr(port);
1222                                 if (ret) {
1223                                         netdev_err(dev, "failed resensing port attributes\n");
1224                                         break;
1225                                 }
1226
1227                                 netif_info(port, link, dev,
1228                                            "Logical port up: %dMbps %s Duplex\n",
1229                                            port->port_speed,
1230                                            port->full_duplex == 1 ?
1231                                            "Full" : "Half");
1232
1233                                 netif_carrier_on(dev);
1234                                 netif_wake_queue(dev);
1235                         }
1236                 } else
1237                         if (netif_carrier_ok(dev)) {
1238                                 netif_info(port, link, dev,
1239                                            "Logical port down\n");
1240                                 netif_carrier_off(dev);
1241                                 netif_tx_disable(dev);
1242                         }
1243
1244                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1245                         port->phy_link = EHEA_PHY_LINK_UP;
1246                         netif_info(port, link, dev,
1247                                    "Physical port up\n");
1248                         if (prop_carrier_state)
1249                                 netif_carrier_on(dev);
1250                 } else {
1251                         port->phy_link = EHEA_PHY_LINK_DOWN;
1252                         netif_info(port, link, dev,
1253                                    "Physical port down\n");
1254                         if (prop_carrier_state)
1255                                 netif_carrier_off(dev);
1256                 }
1257
1258                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1259                         netdev_info(dev,
1260                                     "External switch port is primary port\n");
1261                 else
1262                         netdev_info(dev,
1263                                     "External switch port is backup port\n");
1264
1265                 break;
1266         case EHEA_EC_ADAPTER_MALFUNC:
1267                 netdev_err(dev, "Adapter malfunction\n");
1268                 break;
1269         case EHEA_EC_PORT_MALFUNC:
1270                 netdev_info(dev, "Port malfunction\n");
1271                 netif_carrier_off(dev);
1272                 netif_tx_disable(dev);
1273                 break;
1274         default:
1275                 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1276                 break;
1277         }
1278 }
1279
1280 static void ehea_neq_tasklet(unsigned long data)
1281 {
1282         struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1283         struct ehea_eqe *eqe;
1284         u64 event_mask;
1285
1286         eqe = ehea_poll_eq(adapter->neq);
1287         pr_debug("eqe=%p\n", eqe);
1288
1289         while (eqe) {
1290                 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1291                 ehea_parse_eqe(adapter, eqe->entry);
1292                 eqe = ehea_poll_eq(adapter->neq);
1293                 pr_debug("next eqe=%p\n", eqe);
1294         }
1295
1296         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1297                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1298                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1299
1300         ehea_h_reset_events(adapter->handle,
1301                             adapter->neq->fw_handle, event_mask);
1302 }
1303
1304 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1305 {
1306         struct ehea_adapter *adapter = param;
1307         tasklet_hi_schedule(&adapter->neq_tasklet);
1308         return IRQ_HANDLED;
1309 }
1310
1311
1312 static int ehea_fill_port_res(struct ehea_port_res *pr)
1313 {
1314         int ret;
1315         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1316
1317         ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1318
1319         ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1320
1321         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1322
1323         return ret;
1324 }
1325
1326 static int ehea_reg_interrupts(struct net_device *dev)
1327 {
1328         struct ehea_port *port = netdev_priv(dev);
1329         struct ehea_port_res *pr;
1330         int i, ret;
1331
1332
1333         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1334                  dev->name);
1335
1336         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1337                                   ehea_qp_aff_irq_handler,
1338                                   IRQF_DISABLED, port->int_aff_name, port);
1339         if (ret) {
1340                 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1341                            port->qp_eq->attr.ist1);
1342                 goto out_free_qpeq;
1343         }
1344
1345         netif_info(port, ifup, dev,
1346                    "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1347                    port->qp_eq->attr.ist1);
1348
1349
1350         for (i = 0; i < port->num_def_qps; i++) {
1351                 pr = &port->port_res[i];
1352                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1353                          "%s-queue%d", dev->name, i);
1354                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1355                                           ehea_recv_irq_handler,
1356                                           IRQF_DISABLED, pr->int_send_name,
1357                                           pr);
1358                 if (ret) {
1359                         netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1360                                    i, pr->eq->attr.ist1);
1361                         goto out_free_req;
1362                 }
1363                 netif_info(port, ifup, dev,
1364                            "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1365                            pr->eq->attr.ist1, i);
1366         }
1367 out:
1368         return ret;
1369
1370
1371 out_free_req:
1372         while (--i >= 0) {
1373                 u32 ist = port->port_res[i].eq->attr.ist1;
1374                 ibmebus_free_irq(ist, &port->port_res[i]);
1375         }
1376
1377 out_free_qpeq:
1378         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1379         i = port->num_def_qps;
1380
1381         goto out;
1382
1383 }
1384
1385 static void ehea_free_interrupts(struct net_device *dev)
1386 {
1387         struct ehea_port *port = netdev_priv(dev);
1388         struct ehea_port_res *pr;
1389         int i;
1390
1391         /* send */
1392
1393         for (i = 0; i < port->num_def_qps; i++) {
1394                 pr = &port->port_res[i];
1395                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1396                 netif_info(port, intr, dev,
1397                            "free send irq for res %d with handle 0x%X\n",
1398                            i, pr->eq->attr.ist1);
1399         }
1400
1401         /* associated events */
1402         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1403         netif_info(port, intr, dev,
1404                    "associated event interrupt for handle 0x%X freed\n",
1405                    port->qp_eq->attr.ist1);
1406 }
1407
1408 static int ehea_configure_port(struct ehea_port *port)
1409 {
1410         int ret, i;
1411         u64 hret, mask;
1412         struct hcp_ehea_port_cb0 *cb0;
1413
1414         ret = -ENOMEM;
1415         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1416         if (!cb0)
1417                 goto out;
1418
1419         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1420                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1421                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1422                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1423                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1424                                       PXLY_RC_VLAN_FILTER)
1425                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1426
1427         for (i = 0; i < port->num_mcs; i++)
1428                 if (use_mcs)
1429                         cb0->default_qpn_arr[i] =
1430                                 port->port_res[i].qp->init_attr.qp_nr;
1431                 else
1432                         cb0->default_qpn_arr[i] =
1433                                 port->port_res[0].qp->init_attr.qp_nr;
1434
1435         if (netif_msg_ifup(port))
1436                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1437
1438         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1439              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1440
1441         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1442                                        port->logical_port_id,
1443                                        H_PORT_CB0, mask, cb0);
1444         ret = -EIO;
1445         if (hret != H_SUCCESS)
1446                 goto out_free;
1447
1448         ret = 0;
1449
1450 out_free:
1451         free_page((unsigned long)cb0);
1452 out:
1453         return ret;
1454 }
1455
1456 int ehea_gen_smrs(struct ehea_port_res *pr)
1457 {
1458         int ret;
1459         struct ehea_adapter *adapter = pr->port->adapter;
1460
1461         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1462         if (ret)
1463                 goto out;
1464
1465         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1466         if (ret)
1467                 goto out_free;
1468
1469         return 0;
1470
1471 out_free:
1472         ehea_rem_mr(&pr->send_mr);
1473 out:
1474         pr_err("Generating SMRS failed\n");
1475         return -EIO;
1476 }
1477
1478 int ehea_rem_smrs(struct ehea_port_res *pr)
1479 {
1480         if ((ehea_rem_mr(&pr->send_mr)) ||
1481             (ehea_rem_mr(&pr->recv_mr)))
1482                 return -EIO;
1483         else
1484                 return 0;
1485 }
1486
1487 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1488 {
1489         int arr_size = sizeof(void *) * max_q_entries;
1490
1491         q_skba->arr = vzalloc(arr_size);
1492         if (!q_skba->arr)
1493                 return -ENOMEM;
1494
1495         q_skba->len = max_q_entries;
1496         q_skba->index = 0;
1497         q_skba->os_skbs = 0;
1498
1499         return 0;
1500 }
1501
1502 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1503                               struct port_res_cfg *pr_cfg, int queue_token)
1504 {
1505         struct ehea_adapter *adapter = port->adapter;
1506         enum ehea_eq_type eq_type = EHEA_EQ;
1507         struct ehea_qp_init_attr *init_attr = NULL;
1508         int ret = -EIO;
1509         u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1510
1511         tx_bytes = pr->tx_bytes;
1512         tx_packets = pr->tx_packets;
1513         rx_bytes = pr->rx_bytes;
1514         rx_packets = pr->rx_packets;
1515
1516         memset(pr, 0, sizeof(struct ehea_port_res));
1517
1518         pr->tx_bytes = rx_bytes;
1519         pr->tx_packets = tx_packets;
1520         pr->rx_bytes = rx_bytes;
1521         pr->rx_packets = rx_packets;
1522
1523         pr->port = port;
1524
1525         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1526         if (!pr->eq) {
1527                 pr_err("create_eq failed (eq)\n");
1528                 goto out_free;
1529         }
1530
1531         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1532                                      pr->eq->fw_handle,
1533                                      port->logical_port_id);
1534         if (!pr->recv_cq) {
1535                 pr_err("create_cq failed (cq_recv)\n");
1536                 goto out_free;
1537         }
1538
1539         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1540                                      pr->eq->fw_handle,
1541                                      port->logical_port_id);
1542         if (!pr->send_cq) {
1543                 pr_err("create_cq failed (cq_send)\n");
1544                 goto out_free;
1545         }
1546
1547         if (netif_msg_ifup(port))
1548                 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1549                         pr->send_cq->attr.act_nr_of_cqes,
1550                         pr->recv_cq->attr.act_nr_of_cqes);
1551
1552         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1553         if (!init_attr) {
1554                 ret = -ENOMEM;
1555                 pr_err("no mem for ehea_qp_init_attr\n");
1556                 goto out_free;
1557         }
1558
1559         init_attr->low_lat_rq1 = 1;
1560         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1561         init_attr->rq_count = 3;
1562         init_attr->qp_token = queue_token;
1563         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1564         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1565         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1566         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1567         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1568         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1569         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1570         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1571         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1572         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1573         init_attr->port_nr = port->logical_port_id;
1574         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1575         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1576         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1577
1578         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1579         if (!pr->qp) {
1580                 pr_err("create_qp failed\n");
1581                 ret = -EIO;
1582                 goto out_free;
1583         }
1584
1585         if (netif_msg_ifup(port))
1586                 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",
1587                         init_attr->qp_nr,
1588                         init_attr->act_nr_send_wqes,
1589                         init_attr->act_nr_rwqes_rq1,
1590                         init_attr->act_nr_rwqes_rq2,
1591                         init_attr->act_nr_rwqes_rq3);
1592
1593         pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1594
1595         ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1596         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1597         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1598         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1599         if (ret)
1600                 goto out_free;
1601
1602         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1603         if (ehea_gen_smrs(pr) != 0) {
1604                 ret = -EIO;
1605                 goto out_free;
1606         }
1607
1608         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1609
1610         kfree(init_attr);
1611
1612         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1613
1614         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1615         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1616         pr->lro_mgr.lro_arr = pr->lro_desc;
1617         pr->lro_mgr.get_skb_header = get_skb_hdr;
1618         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1619         pr->lro_mgr.dev = port->netdev;
1620         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1621         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1622
1623         ret = 0;
1624         goto out;
1625
1626 out_free:
1627         kfree(init_attr);
1628         vfree(pr->sq_skba.arr);
1629         vfree(pr->rq1_skba.arr);
1630         vfree(pr->rq2_skba.arr);
1631         vfree(pr->rq3_skba.arr);
1632         ehea_destroy_qp(pr->qp);
1633         ehea_destroy_cq(pr->send_cq);
1634         ehea_destroy_cq(pr->recv_cq);
1635         ehea_destroy_eq(pr->eq);
1636 out:
1637         return ret;
1638 }
1639
1640 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1641 {
1642         int ret, i;
1643
1644         if (pr->qp)
1645                 netif_napi_del(&pr->napi);
1646
1647         ret = ehea_destroy_qp(pr->qp);
1648
1649         if (!ret) {
1650                 ehea_destroy_cq(pr->send_cq);
1651                 ehea_destroy_cq(pr->recv_cq);
1652                 ehea_destroy_eq(pr->eq);
1653
1654                 for (i = 0; i < pr->rq1_skba.len; i++)
1655                         if (pr->rq1_skba.arr[i])
1656                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1657
1658                 for (i = 0; i < pr->rq2_skba.len; i++)
1659                         if (pr->rq2_skba.arr[i])
1660                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1661
1662                 for (i = 0; i < pr->rq3_skba.len; i++)
1663                         if (pr->rq3_skba.arr[i])
1664                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1665
1666                 for (i = 0; i < pr->sq_skba.len; i++)
1667                         if (pr->sq_skba.arr[i])
1668                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1669
1670                 vfree(pr->rq1_skba.arr);
1671                 vfree(pr->rq2_skba.arr);
1672                 vfree(pr->rq3_skba.arr);
1673                 vfree(pr->sq_skba.arr);
1674                 ret = ehea_rem_smrs(pr);
1675         }
1676         return ret;
1677 }
1678
1679 /*
1680  * The write_* functions store information in swqe which is used by
1681  * the hardware to calculate the ip/tcp/udp checksum
1682  */
1683
1684 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1685                                       const struct sk_buff *skb)
1686 {
1687         swqe->ip_start = skb_network_offset(skb);
1688         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1689 }
1690
1691 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1692                                         const struct sk_buff *skb)
1693 {
1694         swqe->tcp_offset =
1695                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1696
1697         swqe->tcp_end = (u16)skb->len - 1;
1698 }
1699
1700 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1701                                         const struct sk_buff *skb)
1702 {
1703         swqe->tcp_offset =
1704                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1705
1706         swqe->tcp_end = (u16)skb->len - 1;
1707 }
1708
1709
1710 static void write_swqe2_TSO(struct sk_buff *skb,
1711                             struct ehea_swqe *swqe, u32 lkey)
1712 {
1713         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1714         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1715         int skb_data_size = skb_headlen(skb);
1716         int headersize;
1717
1718         /* Packet is TCP with TSO enabled */
1719         swqe->tx_control |= EHEA_SWQE_TSO;
1720         swqe->mss = skb_shinfo(skb)->gso_size;
1721         /* copy only eth/ip/tcp headers to immediate data and
1722          * the rest of skb->data to sg1entry
1723          */
1724         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1725
1726         skb_data_size = skb_headlen(skb);
1727
1728         if (skb_data_size >= headersize) {
1729                 /* copy immediate data */
1730                 skb_copy_from_linear_data(skb, imm_data, headersize);
1731                 swqe->immediate_data_length = headersize;
1732
1733                 if (skb_data_size > headersize) {
1734                         /* set sg1entry data */
1735                         sg1entry->l_key = lkey;
1736                         sg1entry->len = skb_data_size - headersize;
1737                         sg1entry->vaddr =
1738                                 ehea_map_vaddr(skb->data + headersize);
1739                         swqe->descriptors++;
1740                 }
1741         } else
1742                 pr_err("cannot handle fragmented headers\n");
1743 }
1744
1745 static void write_swqe2_nonTSO(struct sk_buff *skb,
1746                                struct ehea_swqe *swqe, u32 lkey)
1747 {
1748         int skb_data_size = skb_headlen(skb);
1749         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1750         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1751
1752         /* Packet is any nonTSO type
1753          *
1754          * Copy as much as possible skb->data to immediate data and
1755          * the rest to sg1entry
1756          */
1757         if (skb_data_size >= SWQE2_MAX_IMM) {
1758                 /* copy immediate data */
1759                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1760
1761                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1762
1763                 if (skb_data_size > SWQE2_MAX_IMM) {
1764                         /* copy sg1entry data */
1765                         sg1entry->l_key = lkey;
1766                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1767                         sg1entry->vaddr =
1768                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1769                         swqe->descriptors++;
1770                 }
1771         } else {
1772                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1773                 swqe->immediate_data_length = skb_data_size;
1774         }
1775 }
1776
1777 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1778                                     struct ehea_swqe *swqe, u32 lkey)
1779 {
1780         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1781         skb_frag_t *frag;
1782         int nfrags, sg1entry_contains_frag_data, i;
1783
1784         nfrags = skb_shinfo(skb)->nr_frags;
1785         sg1entry = &swqe->u.immdata_desc.sg_entry;
1786         sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1787         swqe->descriptors = 0;
1788         sg1entry_contains_frag_data = 0;
1789
1790         if (skb_is_gso(skb))
1791                 write_swqe2_TSO(skb, swqe, lkey);
1792         else
1793                 write_swqe2_nonTSO(skb, swqe, lkey);
1794
1795         /* write descriptors */
1796         if (nfrags > 0) {
1797                 if (swqe->descriptors == 0) {
1798                         /* sg1entry not yet used */
1799                         frag = &skb_shinfo(skb)->frags[0];
1800
1801                         /* copy sg1entry data */
1802                         sg1entry->l_key = lkey;
1803                         sg1entry->len = frag->size;
1804                         sg1entry->vaddr =
1805                                 ehea_map_vaddr(skb_frag_address(frag));
1806                         swqe->descriptors++;
1807                         sg1entry_contains_frag_data = 1;
1808                 }
1809
1810                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1811
1812                         frag = &skb_shinfo(skb)->frags[i];
1813                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1814
1815                         sgentry->l_key = lkey;
1816                         sgentry->len = frag->size;
1817                         sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1818                         swqe->descriptors++;
1819                 }
1820         }
1821 }
1822
1823 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1824 {
1825         int ret = 0;
1826         u64 hret;
1827         u8 reg_type;
1828
1829         /* De/Register untagged packets */
1830         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1831         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1832                                      port->logical_port_id,
1833                                      reg_type, port->mac_addr, 0, hcallid);
1834         if (hret != H_SUCCESS) {
1835                 pr_err("%sregistering bc address failed (tagged)\n",
1836                        hcallid == H_REG_BCMC ? "" : "de");
1837                 ret = -EIO;
1838                 goto out_herr;
1839         }
1840
1841         /* De/Register VLAN packets */
1842         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1843         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1844                                      port->logical_port_id,
1845                                      reg_type, port->mac_addr, 0, hcallid);
1846         if (hret != H_SUCCESS) {
1847                 pr_err("%sregistering bc address failed (vlan)\n",
1848                        hcallid == H_REG_BCMC ? "" : "de");
1849                 ret = -EIO;
1850         }
1851 out_herr:
1852         return ret;
1853 }
1854
1855 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1856 {
1857         struct ehea_port *port = netdev_priv(dev);
1858         struct sockaddr *mac_addr = sa;
1859         struct hcp_ehea_port_cb0 *cb0;
1860         int ret;
1861         u64 hret;
1862
1863         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1864                 ret = -EADDRNOTAVAIL;
1865                 goto out;
1866         }
1867
1868         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1869         if (!cb0) {
1870                 pr_err("no mem for cb0\n");
1871                 ret = -ENOMEM;
1872                 goto out;
1873         }
1874
1875         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1876
1877         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1878
1879         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1880                                        port->logical_port_id, H_PORT_CB0,
1881                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1882         if (hret != H_SUCCESS) {
1883                 ret = -EIO;
1884                 goto out_free;
1885         }
1886
1887         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1888
1889         /* Deregister old MAC in pHYP */
1890         if (port->state == EHEA_PORT_UP) {
1891                 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1892                 if (ret)
1893                         goto out_upregs;
1894         }
1895
1896         port->mac_addr = cb0->port_mac_addr << 16;
1897
1898         /* Register new MAC in pHYP */
1899         if (port->state == EHEA_PORT_UP) {
1900                 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1901                 if (ret)
1902                         goto out_upregs;
1903         }
1904
1905         ret = 0;
1906
1907 out_upregs:
1908         ehea_update_bcmc_registrations();
1909 out_free:
1910         free_page((unsigned long)cb0);
1911 out:
1912         return ret;
1913 }
1914
1915 static void ehea_promiscuous_error(u64 hret, int enable)
1916 {
1917         if (hret == H_AUTHORITY)
1918                 pr_info("Hypervisor denied %sabling promiscuous mode\n",
1919                         enable == 1 ? "en" : "dis");
1920         else
1921                 pr_err("failed %sabling promiscuous mode\n",
1922                        enable == 1 ? "en" : "dis");
1923 }
1924
1925 static void ehea_promiscuous(struct net_device *dev, int enable)
1926 {
1927         struct ehea_port *port = netdev_priv(dev);
1928         struct hcp_ehea_port_cb7 *cb7;
1929         u64 hret;
1930
1931         if (enable == port->promisc)
1932                 return;
1933
1934         cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1935         if (!cb7) {
1936                 pr_err("no mem for cb7\n");
1937                 goto out;
1938         }
1939
1940         /* Modify Pxs_DUCQPN in CB7 */
1941         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1942
1943         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1944                                        port->logical_port_id,
1945                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1946         if (hret) {
1947                 ehea_promiscuous_error(hret, enable);
1948                 goto out;
1949         }
1950
1951         port->promisc = enable;
1952 out:
1953         free_page((unsigned long)cb7);
1954 }
1955
1956 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1957                                      u32 hcallid)
1958 {
1959         u64 hret;
1960         u8 reg_type;
1961
1962         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1963                  | EHEA_BCMC_UNTAGGED;
1964
1965         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1966                                      port->logical_port_id,
1967                                      reg_type, mc_mac_addr, 0, hcallid);
1968         if (hret)
1969                 goto out;
1970
1971         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1972                  | EHEA_BCMC_VLANID_ALL;
1973
1974         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1975                                      port->logical_port_id,
1976                                      reg_type, mc_mac_addr, 0, hcallid);
1977 out:
1978         return hret;
1979 }
1980
1981 static int ehea_drop_multicast_list(struct net_device *dev)
1982 {
1983         struct ehea_port *port = netdev_priv(dev);
1984         struct ehea_mc_list *mc_entry = port->mc_list;
1985         struct list_head *pos;
1986         struct list_head *temp;
1987         int ret = 0;
1988         u64 hret;
1989
1990         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1991                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1992
1993                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1994                                                  H_DEREG_BCMC);
1995                 if (hret) {
1996                         pr_err("failed deregistering mcast MAC\n");
1997                         ret = -EIO;
1998                 }
1999
2000                 list_del(pos);
2001                 kfree(mc_entry);
2002         }
2003         return ret;
2004 }
2005
2006 static void ehea_allmulti(struct net_device *dev, int enable)
2007 {
2008         struct ehea_port *port = netdev_priv(dev);
2009         u64 hret;
2010
2011         if (!port->allmulti) {
2012                 if (enable) {
2013                         /* Enable ALLMULTI */
2014                         ehea_drop_multicast_list(dev);
2015                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
2016                         if (!hret)
2017                                 port->allmulti = 1;
2018                         else
2019                                 netdev_err(dev,
2020                                            "failed enabling IFF_ALLMULTI\n");
2021                 }
2022         } else
2023                 if (!enable) {
2024                         /* Disable ALLMULTI */
2025                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
2026                         if (!hret)
2027                                 port->allmulti = 0;
2028                         else
2029                                 netdev_err(dev,
2030                                            "failed disabling IFF_ALLMULTI\n");
2031                 }
2032 }
2033
2034 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
2035 {
2036         struct ehea_mc_list *ehea_mcl_entry;
2037         u64 hret;
2038
2039         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
2040         if (!ehea_mcl_entry) {
2041                 pr_err("no mem for mcl_entry\n");
2042                 return;
2043         }
2044
2045         INIT_LIST_HEAD(&ehea_mcl_entry->list);
2046
2047         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
2048
2049         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
2050                                          H_REG_BCMC);
2051         if (!hret)
2052                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
2053         else {
2054                 pr_err("failed registering mcast MAC\n");
2055                 kfree(ehea_mcl_entry);
2056         }
2057 }
2058
2059 static void ehea_set_multicast_list(struct net_device *dev)
2060 {
2061         struct ehea_port *port = netdev_priv(dev);
2062         struct netdev_hw_addr *ha;
2063         int ret;
2064
2065         if (port->promisc) {
2066                 ehea_promiscuous(dev, 1);
2067                 return;
2068         }
2069         ehea_promiscuous(dev, 0);
2070
2071         if (dev->flags & IFF_ALLMULTI) {
2072                 ehea_allmulti(dev, 1);
2073                 goto out;
2074         }
2075         ehea_allmulti(dev, 0);
2076
2077         if (!netdev_mc_empty(dev)) {
2078                 ret = ehea_drop_multicast_list(dev);
2079                 if (ret) {
2080                         /* Dropping the current multicast list failed.
2081                          * Enabling ALL_MULTI is the best we can do.
2082                          */
2083                         ehea_allmulti(dev, 1);
2084                 }
2085
2086                 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
2087                         pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
2088                                 port->adapter->max_mc_mac);
2089                         goto out;
2090                 }
2091
2092                 netdev_for_each_mc_addr(ha, dev)
2093                         ehea_add_multicast_entry(port, ha->addr);
2094
2095         }
2096 out:
2097         ehea_update_bcmc_registrations();
2098 }
2099
2100 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
2101 {
2102         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
2103                 return -EINVAL;
2104         dev->mtu = new_mtu;
2105         return 0;
2106 }
2107
2108 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2109                        struct ehea_swqe *swqe, u32 lkey)
2110 {
2111         if (skb->protocol == htons(ETH_P_IP)) {
2112                 const struct iphdr *iph = ip_hdr(skb);
2113
2114                 /* IPv4 */
2115                 swqe->tx_control |= EHEA_SWQE_CRC
2116                                  | EHEA_SWQE_IP_CHECKSUM
2117                                  | EHEA_SWQE_TCP_CHECKSUM
2118                                  | EHEA_SWQE_IMM_DATA_PRESENT
2119                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2120
2121                 write_ip_start_end(swqe, skb);
2122
2123                 if (iph->protocol == IPPROTO_UDP) {
2124                         if ((iph->frag_off & IP_MF) ||
2125                             (iph->frag_off & IP_OFFSET))
2126                                 /* IP fragment, so don't change cs */
2127                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
2128                         else
2129                                 write_udp_offset_end(swqe, skb);
2130                 } else if (iph->protocol == IPPROTO_TCP) {
2131                         write_tcp_offset_end(swqe, skb);
2132                 }
2133
2134                 /* icmp (big data) and ip segmentation packets (all other ip
2135                    packets) do not require any special handling */
2136
2137         } else {
2138                 /* Other Ethernet Protocol */
2139                 swqe->tx_control |= EHEA_SWQE_CRC
2140                                  | EHEA_SWQE_IMM_DATA_PRESENT
2141                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
2142         }
2143
2144         write_swqe2_data(skb, dev, swqe, lkey);
2145 }
2146
2147 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2148                        struct ehea_swqe *swqe)
2149 {
2150         int nfrags = skb_shinfo(skb)->nr_frags;
2151         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2152         skb_frag_t *frag;
2153         int i;
2154
2155         if (skb->protocol == htons(ETH_P_IP)) {
2156                 const struct iphdr *iph = ip_hdr(skb);
2157
2158                 /* IPv4 */
2159                 write_ip_start_end(swqe, skb);
2160
2161                 if (iph->protocol == IPPROTO_TCP) {
2162                         swqe->tx_control |= EHEA_SWQE_CRC
2163                                          | EHEA_SWQE_IP_CHECKSUM
2164                                          | EHEA_SWQE_TCP_CHECKSUM
2165                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2166
2167                         write_tcp_offset_end(swqe, skb);
2168
2169                 } else if (iph->protocol == IPPROTO_UDP) {
2170                         if ((iph->frag_off & IP_MF) ||
2171                             (iph->frag_off & IP_OFFSET))
2172                                 /* IP fragment, so don't change cs */
2173                                 swqe->tx_control |= EHEA_SWQE_CRC
2174                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2175                         else {
2176                                 swqe->tx_control |= EHEA_SWQE_CRC
2177                                                  | EHEA_SWQE_IP_CHECKSUM
2178                                                  | EHEA_SWQE_TCP_CHECKSUM
2179                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
2180
2181                                 write_udp_offset_end(swqe, skb);
2182                         }
2183                 } else {
2184                         /* icmp (big data) and
2185                            ip segmentation packets (all other ip packets) */
2186                         swqe->tx_control |= EHEA_SWQE_CRC
2187                                          | EHEA_SWQE_IP_CHECKSUM
2188                                          | EHEA_SWQE_IMM_DATA_PRESENT;
2189                 }
2190         } else {
2191                 /* Other Ethernet Protocol */
2192                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
2193         }
2194         /* copy (immediate) data */
2195         if (nfrags == 0) {
2196                 /* data is in a single piece */
2197                 skb_copy_from_linear_data(skb, imm_data, skb->len);
2198         } else {
2199                 /* first copy data from the skb->data buffer ... */
2200                 skb_copy_from_linear_data(skb, imm_data,
2201                                           skb_headlen(skb));
2202                 imm_data += skb_headlen(skb);
2203
2204                 /* ... then copy data from the fragments */
2205                 for (i = 0; i < nfrags; i++) {
2206                         frag = &skb_shinfo(skb)->frags[i];
2207                         memcpy(imm_data, skb_frag_address(frag), frag->size);
2208                         imm_data += frag->size;
2209                 }
2210         }
2211         swqe->immediate_data_length = skb->len;
2212         dev_kfree_skb(skb);
2213 }
2214
2215 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2216 {
2217         struct ehea_port *port = netdev_priv(dev);
2218         struct ehea_swqe *swqe;
2219         u32 lkey;
2220         int swqe_index;
2221         struct ehea_port_res *pr;
2222         struct netdev_queue *txq;
2223
2224         pr = &port->port_res[skb_get_queue_mapping(skb)];
2225         txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2226
2227         swqe = ehea_get_swqe(pr->qp, &swqe_index);
2228         memset(swqe, 0, SWQE_HEADER_SIZE);
2229         atomic_dec(&pr->swqe_avail);
2230
2231         if (vlan_tx_tag_present(skb)) {
2232                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2233                 swqe->vlan_tag = vlan_tx_tag_get(skb);
2234         }
2235
2236         pr->tx_packets++;
2237         pr->tx_bytes += skb->len;
2238
2239         if (skb->len <= SWQE3_MAX_IMM) {
2240                 u32 sig_iv = port->sig_comp_iv;
2241                 u32 swqe_num = pr->swqe_id_counter;
2242                 ehea_xmit3(skb, dev, swqe);
2243                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2244                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2245                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
2246                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2247                                                       sig_iv);
2248                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2249                         pr->swqe_ll_count = 0;
2250                 } else
2251                         pr->swqe_ll_count += 1;
2252         } else {
2253                 swqe->wr_id =
2254                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2255                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2256                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2257                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2258                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
2259
2260                 pr->sq_skba.index++;
2261                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
2262
2263                 lkey = pr->send_mr.lkey;
2264                 ehea_xmit2(skb, dev, swqe, lkey);
2265                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2266         }
2267         pr->swqe_id_counter += 1;
2268
2269         netif_info(port, tx_queued, dev,
2270                    "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2271         if (netif_msg_tx_queued(port))
2272                 ehea_dump(swqe, 512, "swqe");
2273
2274         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2275                 netif_tx_stop_queue(txq);
2276                 swqe->tx_control |= EHEA_SWQE_PURGE;
2277         }
2278
2279         ehea_post_swqe(pr->qp, swqe);
2280
2281         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2282                 pr->p_stats.queue_stopped++;
2283                 netif_tx_stop_queue(txq);
2284         }
2285
2286         return NETDEV_TX_OK;
2287 }
2288
2289 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2290 {
2291         struct ehea_port *port = netdev_priv(dev);
2292         struct ehea_adapter *adapter = port->adapter;
2293         struct hcp_ehea_port_cb1 *cb1;
2294         int index;
2295         u64 hret;
2296
2297         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2298         if (!cb1) {
2299                 pr_err("no mem for cb1\n");
2300                 goto out;
2301         }
2302
2303         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2304                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2305         if (hret != H_SUCCESS) {
2306                 pr_err("query_ehea_port failed\n");
2307                 goto out;
2308         }
2309
2310         index = (vid / 64);
2311         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2312
2313         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2314                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2315         if (hret != H_SUCCESS)
2316                 pr_err("modify_ehea_port failed\n");
2317 out:
2318         free_page((unsigned long)cb1);
2319         return;
2320 }
2321
2322 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2323 {
2324         struct ehea_port *port = netdev_priv(dev);
2325         struct ehea_adapter *adapter = port->adapter;
2326         struct hcp_ehea_port_cb1 *cb1;
2327         int index;
2328         u64 hret;
2329
2330         cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2331         if (!cb1) {
2332                 pr_err("no mem for cb1\n");
2333                 goto out;
2334         }
2335
2336         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2337                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2338         if (hret != H_SUCCESS) {
2339                 pr_err("query_ehea_port failed\n");
2340                 goto out;
2341         }
2342
2343         index = (vid / 64);
2344         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2345
2346         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2347                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2348         if (hret != H_SUCCESS)
2349                 pr_err("modify_ehea_port failed\n");
2350 out:
2351         free_page((unsigned long)cb1);
2352 }
2353
2354 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2355 {
2356         int ret = -EIO;
2357         u64 hret;
2358         u16 dummy16 = 0;
2359         u64 dummy64 = 0;
2360         struct hcp_modify_qp_cb0 *cb0;
2361
2362         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2363         if (!cb0) {
2364                 ret = -ENOMEM;
2365                 goto out;
2366         }
2367
2368         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2369                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2370         if (hret != H_SUCCESS) {
2371                 pr_err("query_ehea_qp failed (1)\n");
2372                 goto out;
2373         }
2374
2375         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2376         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2377                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2378                                      &dummy64, &dummy64, &dummy16, &dummy16);
2379         if (hret != H_SUCCESS) {
2380                 pr_err("modify_ehea_qp failed (1)\n");
2381                 goto out;
2382         }
2383
2384         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2385                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2386         if (hret != H_SUCCESS) {
2387                 pr_err("query_ehea_qp failed (2)\n");
2388                 goto out;
2389         }
2390
2391         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2392         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2393                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2394                                      &dummy64, &dummy64, &dummy16, &dummy16);
2395         if (hret != H_SUCCESS) {
2396                 pr_err("modify_ehea_qp failed (2)\n");
2397                 goto out;
2398         }
2399
2400         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2401                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2402         if (hret != H_SUCCESS) {
2403                 pr_err("query_ehea_qp failed (3)\n");
2404                 goto out;
2405         }
2406
2407         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2408         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2409                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2410                                      &dummy64, &dummy64, &dummy16, &dummy16);
2411         if (hret != H_SUCCESS) {
2412                 pr_err("modify_ehea_qp failed (3)\n");
2413                 goto out;
2414         }
2415
2416         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2417                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2418         if (hret != H_SUCCESS) {
2419                 pr_err("query_ehea_qp failed (4)\n");
2420                 goto out;
2421         }
2422
2423         ret = 0;
2424 out:
2425         free_page((unsigned long)cb0);
2426         return ret;
2427 }
2428
2429 static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2430 {
2431         int ret, i;
2432         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2433         enum ehea_eq_type eq_type = EHEA_EQ;
2434
2435         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2436                                    EHEA_MAX_ENTRIES_EQ, 1);
2437         if (!port->qp_eq) {
2438                 ret = -EINVAL;
2439                 pr_err("ehea_create_eq failed (qp_eq)\n");
2440                 goto out_kill_eq;
2441         }
2442
2443         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2444         pr_cfg.max_entries_scq = sq_entries * 2;
2445         pr_cfg.max_entries_sq = sq_entries;
2446         pr_cfg.max_entries_rq1 = rq1_entries;
2447         pr_cfg.max_entries_rq2 = rq2_entries;
2448         pr_cfg.max_entries_rq3 = rq3_entries;
2449
2450         pr_cfg_small_rx.max_entries_rcq = 1;
2451         pr_cfg_small_rx.max_entries_scq = sq_entries;
2452         pr_cfg_small_rx.max_entries_sq = sq_entries;
2453         pr_cfg_small_rx.max_entries_rq1 = 1;
2454         pr_cfg_small_rx.max_entries_rq2 = 1;
2455         pr_cfg_small_rx.max_entries_rq3 = 1;
2456
2457         for (i = 0; i < def_qps; i++) {
2458                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2459                 if (ret)
2460                         goto out_clean_pr;
2461         }
2462         for (i = def_qps; i < def_qps; i++) {
2463                 ret = ehea_init_port_res(port, &port->port_res[i],
2464                                          &pr_cfg_small_rx, i);
2465                 if (ret)
2466                         goto out_clean_pr;
2467         }
2468
2469         return 0;
2470
2471 out_clean_pr:
2472         while (--i >= 0)
2473                 ehea_clean_portres(port, &port->port_res[i]);
2474
2475 out_kill_eq:
2476         ehea_destroy_eq(port->qp_eq);
2477         return ret;
2478 }
2479
2480 static int ehea_clean_all_portres(struct ehea_port *port)
2481 {
2482         int ret = 0;
2483         int i;
2484
2485         for (i = 0; i < port->num_def_qps; i++)
2486                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2487
2488         ret |= ehea_destroy_eq(port->qp_eq);
2489
2490         return ret;
2491 }
2492
2493 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2494 {
2495         if (adapter->active_ports)
2496                 return;
2497
2498         ehea_rem_mr(&adapter->mr);
2499 }
2500
2501 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2502 {
2503         if (adapter->active_ports)
2504                 return 0;
2505
2506         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2507 }
2508
2509 static int ehea_up(struct net_device *dev)
2510 {
2511         int ret, i;
2512         struct ehea_port *port = netdev_priv(dev);
2513
2514         if (port->state == EHEA_PORT_UP)
2515                 return 0;
2516
2517         ret = ehea_port_res_setup(port, port->num_def_qps);
2518         if (ret) {
2519                 netdev_err(dev, "port_res_failed\n");
2520                 goto out;
2521         }
2522
2523         /* Set default QP for this port */
2524         ret = ehea_configure_port(port);
2525         if (ret) {
2526                 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2527                 goto out_clean_pr;
2528         }
2529
2530         ret = ehea_reg_interrupts(dev);
2531         if (ret) {
2532                 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2533                 goto out_clean_pr;
2534         }
2535
2536         for (i = 0; i < port->num_def_qps; i++) {
2537                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2538                 if (ret) {
2539                         netdev_err(dev, "activate_qp failed\n");
2540                         goto out_free_irqs;
2541                 }
2542         }
2543
2544         for (i = 0; i < port->num_def_qps; i++) {
2545                 ret = ehea_fill_port_res(&port->port_res[i]);
2546                 if (ret) {
2547                         netdev_err(dev, "out_free_irqs\n");
2548                         goto out_free_irqs;
2549                 }
2550         }
2551
2552         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2553         if (ret) {
2554                 ret = -EIO;
2555                 goto out_free_irqs;
2556         }
2557
2558         port->state = EHEA_PORT_UP;
2559
2560         ret = 0;
2561         goto out;
2562
2563 out_free_irqs:
2564         ehea_free_interrupts(dev);
2565
2566 out_clean_pr:
2567         ehea_clean_all_portres(port);
2568 out:
2569         if (ret)
2570                 netdev_info(dev, "Failed starting. ret=%i\n", ret);
2571
2572         ehea_update_bcmc_registrations();
2573         ehea_update_firmware_handles();
2574
2575         return ret;
2576 }
2577
2578 static void port_napi_disable(struct ehea_port *port)
2579 {
2580         int i;
2581
2582         for (i = 0; i < port->num_def_qps; i++)
2583                 napi_disable(&port->port_res[i].napi);
2584 }
2585
2586 static void port_napi_enable(struct ehea_port *port)
2587 {
2588         int i;
2589
2590         for (i = 0; i < port->num_def_qps; i++)
2591                 napi_enable(&port->port_res[i].napi);
2592 }
2593
2594 static int ehea_open(struct net_device *dev)
2595 {
2596         int ret;
2597         struct ehea_port *port = netdev_priv(dev);
2598
2599         mutex_lock(&port->port_lock);
2600
2601         netif_info(port, ifup, dev, "enabling port\n");
2602
2603         ret = ehea_up(dev);
2604         if (!ret) {
2605                 port_napi_enable(port);
2606                 netif_tx_start_all_queues(dev);
2607         }
2608
2609         mutex_unlock(&port->port_lock);
2610         schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000));
2611
2612         return ret;
2613 }
2614
2615 static int ehea_down(struct net_device *dev)
2616 {
2617         int ret;
2618         struct ehea_port *port = netdev_priv(dev);
2619
2620         if (port->state == EHEA_PORT_DOWN)
2621                 return 0;
2622
2623         ehea_drop_multicast_list(dev);
2624         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2625
2626         ehea_free_interrupts(dev);
2627
2628         port->state = EHEA_PORT_DOWN;
2629
2630         ehea_update_bcmc_registrations();
2631
2632         ret = ehea_clean_all_portres(port);
2633         if (ret)
2634                 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2635
2636         ehea_update_firmware_handles();
2637
2638         return ret;
2639 }
2640
2641 static int ehea_stop(struct net_device *dev)
2642 {
2643         int ret;
2644         struct ehea_port *port = netdev_priv(dev);
2645
2646         netif_info(port, ifdown, dev, "disabling port\n");
2647
2648         set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2649         cancel_work_sync(&port->reset_task);
2650         cancel_delayed_work_sync(&port->stats_work);
2651         mutex_lock(&port->port_lock);
2652         netif_tx_stop_all_queues(dev);
2653         port_napi_disable(port);
2654         ret = ehea_down(dev);
2655         mutex_unlock(&port->port_lock);
2656         clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2657         return ret;
2658 }
2659
2660 static void ehea_purge_sq(struct ehea_qp *orig_qp)
2661 {
2662         struct ehea_qp qp = *orig_qp;
2663         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2664         struct ehea_swqe *swqe;
2665         int wqe_index;
2666         int i;
2667
2668         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2669                 swqe = ehea_get_swqe(&qp, &wqe_index);
2670                 swqe->tx_control |= EHEA_SWQE_PURGE;
2671         }
2672 }
2673
2674 static void ehea_flush_sq(struct ehea_port *port)
2675 {
2676         int i;
2677
2678         for (i = 0; i < port->num_def_qps; i++) {
2679                 struct ehea_port_res *pr = &port->port_res[i];
2680                 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2681                 int ret;
2682
2683                 ret = wait_event_timeout(port->swqe_avail_wq,
2684                          atomic_read(&pr->swqe_avail) >= swqe_max,
2685                          msecs_to_jiffies(100));
2686
2687                 if (!ret) {
2688                         pr_err("WARNING: sq not flushed completely\n");
2689                         break;
2690                 }
2691         }
2692 }
2693
2694 int ehea_stop_qps(struct net_device *dev)
2695 {
2696         struct ehea_port *port = netdev_priv(dev);
2697         struct ehea_adapter *adapter = port->adapter;
2698         struct hcp_modify_qp_cb0 *cb0;
2699         int ret = -EIO;
2700         int dret;
2701         int i;
2702         u64 hret;
2703         u64 dummy64 = 0;
2704         u16 dummy16 = 0;
2705
2706         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2707         if (!cb0) {
2708                 ret = -ENOMEM;
2709                 goto out;
2710         }
2711
2712         for (i = 0; i < (port->num_def_qps); i++) {
2713                 struct ehea_port_res *pr =  &port->port_res[i];
2714                 struct ehea_qp *qp = pr->qp;
2715
2716                 /* Purge send queue */
2717                 ehea_purge_sq(qp);
2718
2719                 /* Disable queue pair */
2720                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2721                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2722                                             cb0);
2723                 if (hret != H_SUCCESS) {
2724                         pr_err("query_ehea_qp failed (1)\n");
2725                         goto out;
2726                 }
2727
2728                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2729                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2730
2731                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2732                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2733                                                             1), cb0, &dummy64,
2734                                              &dummy64, &dummy16, &dummy16);
2735                 if (hret != H_SUCCESS) {
2736                         pr_err("modify_ehea_qp failed (1)\n");
2737                         goto out;
2738                 }
2739
2740                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2741                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2742                                             cb0);
2743                 if (hret != H_SUCCESS) {
2744                         pr_err("query_ehea_qp failed (2)\n");
2745                         goto out;
2746                 }
2747
2748                 /* deregister shared memory regions */
2749                 dret = ehea_rem_smrs(pr);
2750                 if (dret) {
2751                         pr_err("unreg shared memory region failed\n");
2752                         goto out;
2753                 }
2754         }
2755
2756         ret = 0;
2757 out:
2758         free_page((unsigned long)cb0);
2759
2760         return ret;
2761 }
2762
2763 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2764 {
2765         struct ehea_qp qp = *orig_qp;
2766         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2767         struct ehea_rwqe *rwqe;
2768         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2769         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2770         struct sk_buff *skb;
2771         u32 lkey = pr->recv_mr.lkey;
2772
2773
2774         int i;
2775         int index;
2776
2777         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2778                 rwqe = ehea_get_next_rwqe(&qp, 2);
2779                 rwqe->sg_list[0].l_key = lkey;
2780                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2781                 skb = skba_rq2[index];
2782                 if (skb)
2783                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2784         }
2785
2786         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2787                 rwqe = ehea_get_next_rwqe(&qp, 3);
2788                 rwqe->sg_list[0].l_key = lkey;
2789                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2790                 skb = skba_rq3[index];
2791                 if (skb)
2792                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2793         }
2794 }
2795
2796 int ehea_restart_qps(struct net_device *dev)
2797 {
2798         struct ehea_port *port = netdev_priv(dev);
2799         struct ehea_adapter *adapter = port->adapter;
2800         int ret = 0;
2801         int i;
2802
2803         struct hcp_modify_qp_cb0 *cb0;
2804         u64 hret;
2805         u64 dummy64 = 0;
2806         u16 dummy16 = 0;
2807
2808         cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2809         if (!cb0) {
2810                 ret = -ENOMEM;
2811                 goto out;
2812         }
2813
2814         for (i = 0; i < (port->num_def_qps); i++) {
2815                 struct ehea_port_res *pr =  &port->port_res[i];
2816                 struct ehea_qp *qp = pr->qp;
2817
2818                 ret = ehea_gen_smrs(pr);
2819                 if (ret) {
2820                         netdev_err(dev, "creation of shared memory regions failed\n");
2821                         goto out;
2822                 }
2823
2824                 ehea_update_rqs(qp, pr);
2825
2826                 /* Enable queue pair */
2827                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2828                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2829                                             cb0);
2830                 if (hret != H_SUCCESS) {
2831                         netdev_err(dev, "query_ehea_qp failed (1)\n");
2832                         goto out;
2833                 }
2834
2835                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2836                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2837
2838                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2839                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2840                                                             1), cb0, &dummy64,
2841                                              &dummy64, &dummy16, &dummy16);
2842                 if (hret != H_SUCCESS) {
2843                         netdev_err(dev, "modify_ehea_qp failed (1)\n");
2844                         goto out;
2845                 }
2846
2847                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2848                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2849                                             cb0);
2850                 if (hret != H_SUCCESS) {
2851                         netdev_err(dev, "query_ehea_qp failed (2)\n");
2852                         goto out;
2853                 }
2854
2855                 /* refill entire queue */
2856                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2857                 ehea_refill_rq2(pr, 0);
2858                 ehea_refill_rq3(pr, 0);
2859         }
2860 out:
2861         free_page((unsigned long)cb0);
2862
2863         return ret;
2864 }
2865
2866 static void ehea_reset_port(struct work_struct *work)
2867 {
2868         int ret;
2869         struct ehea_port *port =
2870                 container_of(work, struct ehea_port, reset_task);
2871         struct net_device *dev = port->netdev;
2872
2873         mutex_lock(&dlpar_mem_lock);
2874         port->resets++;
2875         mutex_lock(&port->port_lock);
2876         netif_tx_disable(dev);
2877
2878         port_napi_disable(port);
2879
2880         ehea_down(dev);
2881
2882         ret = ehea_up(dev);
2883         if (ret)
2884                 goto out;
2885
2886         ehea_set_multicast_list(dev);
2887
2888         netif_info(port, timer, dev, "reset successful\n");
2889
2890         port_napi_enable(port);
2891
2892         netif_tx_wake_all_queues(dev);
2893 out:
2894         mutex_unlock(&port->port_lock);
2895         mutex_unlock(&dlpar_mem_lock);
2896 }
2897
2898 static void ehea_rereg_mrs(void)
2899 {
2900         int ret, i;
2901         struct ehea_adapter *adapter;
2902
2903         pr_info("LPAR memory changed - re-initializing driver\n");
2904
2905         list_for_each_entry(adapter, &adapter_list, list)
2906                 if (adapter->active_ports) {
2907                         /* Shutdown all ports */
2908                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2909                                 struct ehea_port *port = adapter->port[i];
2910                                 struct net_device *dev;
2911
2912                                 if (!port)
2913                                         continue;
2914
2915                                 dev = port->netdev;
2916
2917                                 if (dev->flags & IFF_UP) {
2918                                         mutex_lock(&port->port_lock);
2919                                         netif_tx_disable(dev);
2920                                         ehea_flush_sq(port);
2921                                         ret = ehea_stop_qps(dev);
2922                                         if (ret) {
2923                                                 mutex_unlock(&port->port_lock);
2924                                                 goto out;
2925                                         }
2926                                         port_napi_disable(port);
2927                                         mutex_unlock(&port->port_lock);
2928                                 }
2929                                 reset_sq_restart_flag(port);
2930                         }
2931
2932                         /* Unregister old memory region */
2933                         ret = ehea_rem_mr(&adapter->mr);
2934                         if (ret) {
2935                                 pr_err("unregister MR failed - driver inoperable!\n");
2936                                 goto out;
2937                         }
2938                 }
2939
2940         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2941
2942         list_for_each_entry(adapter, &adapter_list, list)
2943                 if (adapter->active_ports) {
2944                         /* Register new memory region */
2945                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2946                         if (ret) {
2947                                 pr_err("register MR failed - driver inoperable!\n");
2948                                 goto out;
2949                         }
2950
2951                         /* Restart all ports */
2952                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2953                                 struct ehea_port *port = adapter->port[i];
2954
2955                                 if (port) {
2956                                         struct net_device *dev = port->netdev;
2957
2958                                         if (dev->flags & IFF_UP) {
2959                                                 mutex_lock(&port->port_lock);
2960                                                 ret = ehea_restart_qps(dev);
2961                                                 if (!ret) {
2962                                                         check_sqs(port);
2963                                                         port_napi_enable(port);
2964                                                         netif_tx_wake_all_queues(dev);
2965                                                 } else {
2966                                                         netdev_err(dev, "Unable to restart QPS\n");
2967                                                 }
2968                                                 mutex_unlock(&port->port_lock);
2969                                         }
2970                                 }
2971                         }
2972                 }
2973         pr_info("re-initializing driver complete\n");
2974 out:
2975         return;
2976 }
2977
2978 static void ehea_tx_watchdog(struct net_device *dev)
2979 {
2980         struct ehea_port *port = netdev_priv(dev);
2981
2982         if (netif_carrier_ok(dev) &&
2983             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2984                 ehea_schedule_port_reset(port);
2985 }
2986
2987 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2988 {
2989         struct hcp_query_ehea *cb;
2990         u64 hret;
2991         int ret;
2992
2993         cb = (void *)get_zeroed_page(GFP_KERNEL);
2994         if (!cb) {
2995                 ret = -ENOMEM;
2996                 goto out;
2997         }
2998
2999         hret = ehea_h_query_ehea(adapter->handle, cb);
3000
3001         if (hret != H_SUCCESS) {
3002                 ret = -EIO;
3003                 goto out_herr;
3004         }
3005
3006         adapter->max_mc_mac = cb->max_mc_mac - 1;
3007         ret = 0;
3008
3009 out_herr:
3010         free_page((unsigned long)cb);
3011 out:
3012         return ret;
3013 }
3014
3015 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
3016 {
3017         struct hcp_ehea_port_cb4 *cb4;
3018         u64 hret;
3019         int ret = 0;
3020
3021         *jumbo = 0;
3022
3023         /* (Try to) enable *jumbo frames */
3024         cb4 = (void *)get_zeroed_page(GFP_KERNEL);
3025         if (!cb4) {
3026                 pr_err("no mem for cb4\n");
3027                 ret = -ENOMEM;
3028                 goto out;
3029         } else {
3030                 hret = ehea_h_query_ehea_port(port->adapter->handle,
3031                                               port->logical_port_id,
3032                                               H_PORT_CB4,
3033                                               H_PORT_CB4_JUMBO, cb4);
3034                 if (hret == H_SUCCESS) {
3035                         if (cb4->jumbo_frame)
3036                                 *jumbo = 1;
3037                         else {
3038                                 cb4->jumbo_frame = 1;
3039                                 hret = ehea_h_modify_ehea_port(port->adapter->
3040                                                                handle,
3041                                                                port->
3042                                                                logical_port_id,
3043                                                                H_PORT_CB4,
3044                                                                H_PORT_CB4_JUMBO,
3045                                                                cb4);
3046                                 if (hret == H_SUCCESS)
3047                                         *jumbo = 1;
3048                         }
3049                 } else
3050                         ret = -EINVAL;
3051
3052                 free_page((unsigned long)cb4);
3053         }
3054 out:
3055         return ret;
3056 }
3057
3058 static ssize_t ehea_show_port_id(struct device *dev,
3059                                  struct device_attribute *attr, char *buf)
3060 {
3061         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3062         return sprintf(buf, "%d", port->logical_port_id);
3063 }
3064
3065 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
3066                    NULL);
3067
3068 static void __devinit logical_port_release(struct device *dev)
3069 {
3070         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
3071         of_node_put(port->ofdev.dev.of_node);
3072 }
3073
3074 static struct device *ehea_register_port(struct ehea_port *port,
3075                                          struct device_node *dn)
3076 {
3077         int ret;
3078
3079         port->ofdev.dev.of_node = of_node_get(dn);
3080         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
3081         port->ofdev.dev.bus = &ibmebus_bus_type;
3082
3083         dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
3084         port->ofdev.dev.release = logical_port_release;
3085
3086         ret = of_device_register(&port->ofdev);
3087         if (ret) {
3088                 pr_err("failed to register device. ret=%d\n", ret);
3089                 goto out;
3090         }
3091
3092         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
3093         if (ret) {
3094                 pr_err("failed to register attributes, ret=%d\n", ret);
3095                 goto out_unreg_of_dev;
3096         }
3097
3098         return &port->ofdev.dev;
3099
3100 out_unreg_of_dev:
3101         of_device_unregister(&port->ofdev);
3102 out:
3103         return NULL;
3104 }
3105
3106 static void ehea_unregister_port(struct ehea_port *port)
3107 {
3108         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
3109         of_device_unregister(&port->ofdev);
3110 }
3111
3112 static const struct net_device_ops ehea_netdev_ops = {
3113         .ndo_open               = ehea_open,
3114         .ndo_stop               = ehea_stop,
3115         .ndo_start_xmit         = ehea_start_xmit,
3116 #ifdef CONFIG_NET_POLL_CONTROLLER
3117         .ndo_poll_controller    = ehea_netpoll,
3118 #endif
3119         .ndo_get_stats          = ehea_get_stats,
3120         .ndo_set_mac_address    = ehea_set_mac_addr,
3121         .ndo_validate_addr      = eth_validate_addr,
3122         .ndo_set_rx_mode        = ehea_set_multicast_list,
3123         .ndo_change_mtu         = ehea_change_mtu,
3124         .ndo_vlan_rx_add_vid    = ehea_vlan_rx_add_vid,
3125         .ndo_vlan_rx_kill_vid   = ehea_vlan_rx_kill_vid,
3126         .ndo_tx_timeout         = ehea_tx_watchdog,
3127 };
3128
3129 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
3130                                          u32 logical_port_id,
3131                                          struct device_node *dn)
3132 {
3133         int ret;
3134         struct net_device *dev;
3135         struct ehea_port *port;
3136         struct device *port_dev;
3137         int jumbo;
3138
3139         /* allocate memory for the port structures */
3140         dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
3141
3142         if (!dev) {
3143                 pr_err("no mem for net_device\n");
3144                 ret = -ENOMEM;
3145                 goto out_err;
3146         }
3147
3148         port = netdev_priv(dev);
3149
3150         mutex_init(&port->port_lock);
3151         port->state = EHEA_PORT_DOWN;
3152         port->sig_comp_iv = sq_entries / 10;
3153
3154         port->adapter = adapter;
3155         port->netdev = dev;
3156         port->logical_port_id = logical_port_id;
3157
3158         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3159
3160         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3161         if (!port->mc_list) {
3162                 ret = -ENOMEM;
3163                 goto out_free_ethdev;
3164         }
3165
3166         INIT_LIST_HEAD(&port->mc_list->list);
3167
3168         ret = ehea_sense_port_attr(port);
3169         if (ret)
3170                 goto out_free_mc_list;
3171
3172         netif_set_real_num_rx_queues(dev, port->num_def_qps);
3173         netif_set_real_num_tx_queues(dev, port->num_def_qps);
3174
3175         port_dev = ehea_register_port(port, dn);
3176         if (!port_dev)
3177                 goto out_free_mc_list;
3178
3179         SET_NETDEV_DEV(dev, port_dev);
3180
3181         /* initialize net_device structure */
3182         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3183
3184         dev->netdev_ops = &ehea_netdev_ops;
3185         ehea_set_ethtool_ops(dev);
3186
3187         dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3188                       | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
3189         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
3190                       | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
3191                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
3192                       | NETIF_F_RXCSUM;
3193         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3194
3195         if (use_lro)
3196                 dev->features |= NETIF_F_LRO;
3197
3198         INIT_WORK(&port->reset_task, ehea_reset_port);
3199         INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3200
3201         init_waitqueue_head(&port->swqe_avail_wq);
3202         init_waitqueue_head(&port->restart_wq);
3203
3204         memset(&port->stats, 0, sizeof(struct net_device_stats));
3205         ret = register_netdev(dev);
3206         if (ret) {
3207                 pr_err("register_netdev failed. ret=%d\n", ret);
3208                 goto out_unreg_port;
3209         }
3210
3211         port->lro_max_aggr = lro_max_aggr;
3212
3213         ret = ehea_get_jumboframe_status(port, &jumbo);
3214         if (ret)
3215                 netdev_err(dev, "failed determining jumbo frame status\n");
3216
3217         netdev_info(dev, "Jumbo frames are %sabled\n",
3218                     jumbo == 1 ? "en" : "dis");
3219
3220         adapter->active_ports++;
3221
3222         return port;
3223
3224 out_unreg_port:
3225         ehea_unregister_port(port);
3226
3227 out_free_mc_list:
3228         kfree(port->mc_list);
3229
3230 out_free_ethdev:
3231         free_netdev(dev);
3232
3233 out_err:
3234         pr_err("setting up logical port with id=%d failed, ret=%d\n",
3235                logical_port_id, ret);
3236         return NULL;
3237 }
3238
3239 static void ehea_shutdown_single_port(struct ehea_port *port)
3240 {
3241         struct ehea_adapter *adapter = port->adapter;
3242
3243         cancel_work_sync(&port->reset_task);
3244         cancel_delayed_work_sync(&port->stats_work);
3245         unregister_netdev(port->netdev);
3246         ehea_unregister_port(port);
3247         kfree(port->mc_list);
3248         free_netdev(port->netdev);
3249         adapter->active_ports--;
3250 }
3251
3252 static int ehea_setup_ports(struct ehea_adapter *adapter)
3253 {
3254         struct device_node *lhea_dn;
3255         struct device_node *eth_dn = NULL;
3256
3257         const u32 *dn_log_port_id;
3258         int i = 0;
3259
3260         lhea_dn = adapter->ofdev->dev.of_node;
3261         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3262
3263                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3264                                                  NULL);
3265                 if (!dn_log_port_id) {
3266                         pr_err("bad device node: eth_dn name=%s\n",
3267                                eth_dn->full_name);
3268                         continue;
3269                 }
3270
3271                 if (ehea_add_adapter_mr(adapter)) {
3272                         pr_err("creating MR failed\n");
3273                         of_node_put(eth_dn);
3274                         return -EIO;
3275                 }
3276
3277                 adapter->port[i] = ehea_setup_single_port(adapter,
3278                                                           *dn_log_port_id,
3279                                                           eth_dn);
3280                 if (adapter->port[i])
3281                         netdev_info(adapter->port[i]->netdev,
3282                                     "logical port id #%d\n", *dn_log_port_id);
3283                 else
3284                         ehea_remove_adapter_mr(adapter);
3285
3286                 i++;
3287         }
3288         return 0;
3289 }
3290
3291 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3292                                            u32 logical_port_id)
3293 {
3294         struct device_node *lhea_dn;
3295         struct device_node *eth_dn = NULL;
3296         const u32 *dn_log_port_id;
3297
3298         lhea_dn = adapter->ofdev->dev.of_node;
3299         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3300
3301                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3302                                                  NULL);
3303                 if (dn_log_port_id)
3304                         if (*dn_log_port_id == logical_port_id)
3305                                 return eth_dn;
3306         }
3307
3308         return NULL;
3309 }
3310
3311 static ssize_t ehea_probe_port(struct device *dev,
3312                                struct device_attribute *attr,
3313                                const char *buf, size_t count)
3314 {
3315         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3316         struct ehea_port *port;
3317         struct device_node *eth_dn = NULL;
3318         int i;
3319
3320         u32 logical_port_id;
3321
3322         sscanf(buf, "%d", &logical_port_id);
3323
3324         port = ehea_get_port(adapter, logical_port_id);
3325
3326         if (port) {
3327                 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3328                             logical_port_id);
3329                 return -EINVAL;
3330         }
3331
3332         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3333
3334         if (!eth_dn) {
3335                 pr_info("no logical port with id %d found\n", logical_port_id);
3336                 return -EINVAL;
3337         }
3338
3339         if (ehea_add_adapter_mr(adapter)) {
3340                 pr_err("creating MR failed\n");
3341                 return -EIO;
3342         }
3343
3344         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3345
3346         of_node_put(eth_dn);
3347
3348         if (port) {
3349                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3350                         if (!adapter->port[i]) {
3351                                 adapter->port[i] = port;
3352                                 break;
3353                         }
3354
3355                 netdev_info(port->netdev, "added: (logical port id=%d)\n",
3356                             logical_port_id);
3357         } else {
3358                 ehea_remove_adapter_mr(adapter);
3359                 return -EIO;
3360         }
3361
3362         return (ssize_t) count;
3363 }
3364
3365 static ssize_t ehea_remove_port(struct device *dev,
3366                                 struct device_attribute *attr,
3367                                 const char *buf, size_t count)
3368 {
3369         struct ehea_adapter *adapter = dev_get_drvdata(dev);
3370         struct ehea_port *port;
3371         int i;
3372         u32 logical_port_id;
3373
3374         sscanf(buf, "%d", &logical_port_id);
3375
3376         port = ehea_get_port(adapter, logical_port_id);
3377
3378         if (port) {
3379                 netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3380                             logical_port_id);
3381
3382                 ehea_shutdown_single_port(port);
3383
3384                 for (i = 0; i < EHEA_MAX_PORTS; i++)
3385                         if (adapter->port[i] == port) {
3386                                 adapter->port[i] = NULL;
3387                                 break;
3388                         }
3389         } else {
3390                 pr_err("removing port with logical port id=%d failed. port not configured.\n",
3391                        logical_port_id);
3392                 return -EINVAL;
3393         }
3394
3395         ehea_remove_adapter_mr(adapter);
3396
3397         return (ssize_t) count;
3398 }
3399
3400 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3401 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3402
3403 int ehea_create_device_sysfs(struct platform_device *dev)
3404 {
3405         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3406         if (ret)
3407                 goto out;
3408
3409         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3410 out:
3411         return ret;
3412 }
3413
3414 void ehea_remove_device_sysfs(struct platform_device *dev)
3415 {
3416         device_remove_file(&dev->dev, &dev_attr_probe_port);
3417         device_remove_file(&dev->dev, &dev_attr_remove_port);
3418 }
3419
3420 static int __devinit ehea_probe_adapter(struct platform_device *dev,
3421                                         const struct of_device_id *id)
3422 {
3423         struct ehea_adapter *adapter;
3424         const u64 *adapter_handle;
3425         int ret;
3426
3427         if (!dev || !dev->dev.of_node) {
3428                 pr_err("Invalid ibmebus device probed\n");
3429                 return -EINVAL;
3430         }
3431
3432         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3433         if (!adapter) {
3434                 ret = -ENOMEM;
3435                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3436                 goto out;
3437         }
3438
3439         list_add(&adapter->list, &adapter_list);
3440
3441         adapter->ofdev = dev;
3442
3443         adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3444                                          NULL);
3445         if (adapter_handle)
3446                 adapter->handle = *adapter_handle;
3447
3448         if (!adapter->handle) {
3449                 dev_err(&dev->dev, "failed getting handle for adapter"
3450                         " '%s'\n", dev->dev.of_node->full_name);
3451                 ret = -ENODEV;
3452                 goto out_free_ad;
3453         }
3454
3455         adapter->pd = EHEA_PD_ID;
3456
3457         dev_set_drvdata(&dev->dev, adapter);
3458
3459
3460         /* initialize adapter and ports */
3461         /* get adapter properties */
3462         ret = ehea_sense_adapter_attr(adapter);
3463         if (ret) {
3464                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3465                 goto out_free_ad;
3466         }
3467
3468         adapter->neq = ehea_create_eq(adapter,
3469                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3470         if (!adapter->neq) {
3471                 ret = -EIO;
3472                 dev_err(&dev->dev, "NEQ creation failed\n");
3473                 goto out_free_ad;
3474         }
3475
3476         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3477                      (unsigned long)adapter);
3478
3479         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3480                                   ehea_interrupt_neq, IRQF_DISABLED,
3481                                   "ehea_neq", adapter);
3482         if (ret) {
3483                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3484                 goto out_kill_eq;
3485         }
3486
3487         ret = ehea_create_device_sysfs(dev);
3488         if (ret)
3489                 goto out_free_irq;
3490
3491         ret = ehea_setup_ports(adapter);
3492         if (ret) {
3493                 dev_err(&dev->dev, "setup_ports failed\n");
3494                 goto out_rem_dev_sysfs;
3495         }
3496
3497         ret = 0;
3498         goto out;
3499
3500 out_rem_dev_sysfs:
3501         ehea_remove_device_sysfs(dev);
3502
3503 out_free_irq:
3504         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3505
3506 out_kill_eq:
3507         ehea_destroy_eq(adapter->neq);
3508
3509 out_free_ad:
3510         list_del(&adapter->list);
3511         kfree(adapter);
3512
3513 out:
3514         ehea_update_firmware_handles();
3515
3516         return ret;
3517 }
3518
3519 static int __devexit ehea_remove(struct platform_device *dev)
3520 {
3521         struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev);
3522         int i;
3523
3524         for (i = 0; i < EHEA_MAX_PORTS; i++)
3525                 if (adapter->port[i]) {
3526                         ehea_shutdown_single_port(adapter->port[i]);
3527                         adapter->port[i] = NULL;
3528                 }
3529
3530         ehea_remove_device_sysfs(dev);
3531
3532         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3533         tasklet_kill(&adapter->neq_tasklet);
3534
3535         ehea_destroy_eq(adapter->neq);
3536         ehea_remove_adapter_mr(adapter);
3537         list_del(&adapter->list);
3538         kfree(adapter);
3539
3540         ehea_update_firmware_handles();
3541
3542         return 0;
3543 }
3544
3545 void ehea_crash_handler(void)
3546 {
3547         int i;
3548
3549         if (ehea_fw_handles.arr)
3550                 for (i = 0; i < ehea_fw_handles.num_entries; i++)
3551                         ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3552                                              ehea_fw_handles.arr[i].fwh,
3553                                              FORCE_FREE);
3554
3555         if (ehea_bcmc_regs.arr)
3556                 for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3557                         ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3558                                               ehea_bcmc_regs.arr[i].port_id,
3559                                               ehea_bcmc_regs.arr[i].reg_type,
3560                                               ehea_bcmc_regs.arr[i].macaddr,
3561                                               0, H_DEREG_BCMC);
3562 }
3563
3564 static int ehea_mem_notifier(struct notifier_block *nb,
3565                              unsigned long action, void *data)
3566 {
3567         int ret = NOTIFY_BAD;
3568         struct memory_notify *arg = data;
3569
3570         mutex_lock(&dlpar_mem_lock);
3571
3572         switch (action) {
3573         case MEM_CANCEL_OFFLINE:
3574                 pr_info("memory offlining canceled");
3575                 /* Readd canceled memory block */
3576         case MEM_ONLINE:
3577                 pr_info("memory is going online");
3578                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3579                 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3580                         goto out_unlock;
3581                 ehea_rereg_mrs();
3582                 break;
3583         case MEM_GOING_OFFLINE:
3584                 pr_info("memory is going offline");
3585                 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3586                 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3587                         goto out_unlock;
3588                 ehea_rereg_mrs();
3589                 break;
3590         default:
3591                 break;
3592         }
3593
3594         ehea_update_firmware_handles();
3595         ret = NOTIFY_OK;
3596
3597 out_unlock:
3598         mutex_unlock(&dlpar_mem_lock);
3599         return ret;
3600 }
3601
3602 static struct notifier_block ehea_mem_nb = {
3603         .notifier_call = ehea_mem_notifier,
3604 };
3605
3606 static int ehea_reboot_notifier(struct notifier_block *nb,
3607                                 unsigned long action, void *unused)
3608 {
3609         if (action == SYS_RESTART) {
3610                 pr_info("Reboot: freeing all eHEA resources\n");
3611                 ibmebus_unregister_driver(&ehea_driver);
3612         }
3613         return NOTIFY_DONE;
3614 }
3615
3616 static struct notifier_block ehea_reboot_nb = {
3617         .notifier_call = ehea_reboot_notifier,
3618 };
3619
3620 static int check_module_parm(void)
3621 {
3622         int ret = 0;
3623
3624         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3625             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3626                 pr_info("Bad parameter: rq1_entries\n");
3627                 ret = -EINVAL;
3628         }
3629         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3630             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3631                 pr_info("Bad parameter: rq2_entries\n");
3632                 ret = -EINVAL;
3633         }
3634         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3635             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3636                 pr_info("Bad parameter: rq3_entries\n");
3637                 ret = -EINVAL;
3638         }
3639         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3640             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3641                 pr_info("Bad parameter: sq_entries\n");
3642                 ret = -EINVAL;
3643         }
3644
3645         return ret;
3646 }
3647
3648 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3649                                       char *buf)
3650 {
3651         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3652 }
3653
3654 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3655                    ehea_show_capabilities, NULL);
3656
3657 int __init ehea_module_init(void)
3658 {
3659         int ret;
3660
3661         pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3662
3663         memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3664         memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3665
3666         mutex_init(&ehea_fw_handles.lock);
3667         spin_lock_init(&ehea_bcmc_regs.lock);
3668
3669         ret = check_module_parm();
3670         if (ret)
3671                 goto out;
3672
3673         ret = ehea_create_busmap();
3674         if (ret)
3675                 goto out;
3676
3677         ret = register_reboot_notifier(&ehea_reboot_nb);
3678         if (ret)
3679                 pr_info("failed registering reboot notifier\n");
3680
3681         ret = register_memory_notifier(&ehea_mem_nb);
3682         if (ret)
3683                 pr_info("failed registering memory remove notifier\n");
3684
3685         ret = crash_shutdown_register(ehea_crash_handler);
3686         if (ret)
3687                 pr_info("failed registering crash handler\n");
3688
3689         ret = ibmebus_register_driver(&ehea_driver);
3690         if (ret) {
3691                 pr_err("failed registering eHEA device driver on ebus\n");
3692                 goto out2;
3693         }
3694
3695         ret = driver_create_file(&ehea_driver.driver,
3696                                  &driver_attr_capabilities);
3697         if (ret) {
3698                 pr_err("failed to register capabilities attribute, ret=%d\n",
3699                        ret);
3700                 goto out3;
3701         }
3702
3703         return ret;
3704
3705 out3:
3706         ibmebus_unregister_driver(&ehea_driver);
3707 out2:
3708         unregister_memory_notifier(&ehea_mem_nb);
3709         unregister_reboot_notifier(&ehea_reboot_nb);
3710         crash_shutdown_unregister(ehea_crash_handler);
3711 out:
3712         return ret;
3713 }
3714
3715 static void __exit ehea_module_exit(void)
3716 {
3717         int ret;
3718
3719         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3720         ibmebus_unregister_driver(&ehea_driver);
3721         unregister_reboot_notifier(&ehea_reboot_nb);
3722         ret = crash_shutdown_unregister(ehea_crash_handler);
3723         if (ret)
3724                 pr_info("failed unregistering crash handler\n");
3725         unregister_memory_notifier(&ehea_mem_nb);
3726         kfree(ehea_fw_handles.arr);
3727         kfree(ehea_bcmc_regs.arr);
3728         ehea_destroy_busmap();
3729 }
3730
3731 module_init(ehea_module_init);
3732 module_exit(ehea_module_exit);