drivers/net/ehea/ehea_main.c

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