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