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(port->netdev, 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                             && port->vgrp)
 456                                 vlan_hwaccel_receive_skb(skb, port->vgrp,
 457                                                          cqe->vlan_tag);
 458                         else
 459                                 netif_receive_skb(skb);
 460                 } else {
 461                         pr->p_stats.poll_receive_errors++;
 462                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 463                                                            &processed_rq2,
 464                                                            &processed_rq3);
 465                         if (port_reset)
 466                                 break;
 467                 }
 468                 cqe = ehea_poll_rq1(qp, &wqe_index);
 469         }
 470
 471         pr->rx_packets += processed;
 472         *budget -= processed;
 473
 474         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 475         ehea_refill_rq2(pr, processed_rq2);
 476         ehea_refill_rq3(pr, processed_rq3);
 477
 478         cqe = ehea_poll_rq1(qp, &wqe_index);
 479         return cqe;
 480 }
 481
 482 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 483 {
 484         struct sk_buff *skb;
 485         struct ehea_cq *send_cq = pr->send_cq;
 486         struct ehea_cqe *cqe;
 487         int quota = my_quota;
 488         int cqe_counter = 0;
 489         int swqe_av = 0;
 490         int index;
 491         unsigned long flags;
 492
 493         cqe = ehea_poll_cq(send_cq);
 494         while(cqe && (quota > 0)) {
 495                 ehea_inc_cq(send_cq);
 496
 497                 cqe_counter++;
 498                 rmb();
 499                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 500                         ehea_error("Send Completion Error: Resetting port");
 501                         if (netif_msg_tx_err(pr->port))
 502                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 503                         queue_work(pr->port->adapter->ehea_wq,
 504                                    &pr->port->reset_task);
 505                         break;
 506                 }
 507
 508                 if (netif_msg_tx_done(pr->port))
 509                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 510
 511                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 512                            == EHEA_SWQE2_TYPE)) {
 513
 514                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 515                         skb = pr->sq_skba.arr[index];
 516                         dev_kfree_skb(skb);
 517                         pr->sq_skba.arr[index] = NULL;
 518                 }
 519
 520                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 521                 quota--;
 522
 523                 cqe = ehea_poll_cq(send_cq);
 524         };
 525
 526         ehea_update_feca(send_cq, cqe_counter);
 527         atomic_add(swqe_av, &pr->swqe_avail);
 528
 529         spin_lock_irqsave(&pr->netif_queue, flags);
 530
 531         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 532                                   >= pr->swqe_refill_th)) {
 533                 netif_wake_queue(pr->port->netdev);
 534                 pr->queue_stopped = 0;
 535         }
 536         spin_unlock_irqrestore(&pr->netif_queue, flags);
 537
 538         return cqe;
 539 }
 540
 541 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 542
 543 static int ehea_poll(struct net_device *dev, int *budget)
 544 {
 545         struct ehea_port_res *pr = dev->priv;
 546         struct ehea_cqe *cqe;
 547         struct ehea_cqe *cqe_skb = NULL;
 548         int force_irq, wqe_index;
 549
 550         cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 551         cqe_skb = ehea_poll_cq(pr->send_cq);
 552
 553         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 554
 555         if ((!cqe && !cqe_skb) || force_irq) {
 556                 pr->poll_counter = 0;
 557                 netif_rx_complete(dev);
 558                 ehea_reset_cq_ep(pr->recv_cq);
 559                 ehea_reset_cq_ep(pr->send_cq);
 560                 ehea_reset_cq_n1(pr->recv_cq);
 561                 ehea_reset_cq_n1(pr->send_cq);
 562                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 563                 cqe_skb = ehea_poll_cq(pr->send_cq);
 564
 565                 if (!cqe && !cqe_skb)
 566                         return 0;
 567
 568                 if (!netif_rx_reschedule(dev, dev->quota))
 569                         return 0;
 570         }
 571
 572         cqe = ehea_proc_rwqes(dev, pr, budget);
 573         cqe_skb = ehea_proc_cqes(pr, 300);
 574
 575         if (cqe || cqe_skb)
 576                 pr->poll_counter++;
 577
 578         return 1;
 579 }
 580
 581 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 582 {
 583         struct ehea_port_res *pr = param;
 584
 585         netif_rx_schedule(pr->d_netdev);
 586
 587         return IRQ_HANDLED;
 588 }
 589
 590 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 591 {
 592         struct ehea_port *port = param;
 593         struct ehea_eqe *eqe;
 594         struct ehea_qp *qp;
 595         u32 qp_token;
 596
 597         eqe = ehea_poll_eq(port->qp_eq);
 598
 599         while (eqe) {
 600                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 601                 ehea_error("QP aff_err: entry=0x%lx, token=0x%x",
 602                            eqe->entry, qp_token);
 603
 604                 qp = port->port_res[qp_token].qp;
 605                 ehea_error_data(port->adapter, qp->fw_handle);
 606                 eqe = ehea_poll_eq(port->qp_eq);
 607         }
 608
 609         queue_work(port->adapter->ehea_wq, &port->reset_task);
 610
 611         return IRQ_HANDLED;
 612 }
 613
 614 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 615                                        int logical_port)
 616 {
 617         int i;
 618
 619         for (i = 0; i < EHEA_MAX_PORTS; i++)
 620                 if (adapter->port[i])
 621                         if (adapter->port[i]->logical_port_id == logical_port)
 622                                 return adapter->port[i];
 623         return NULL;
 624 }
 625
 626 int ehea_sense_port_attr(struct ehea_port *port)
 627 {
 628         int ret;
 629         u64 hret;
 630         struct hcp_ehea_port_cb0 *cb0;
 631
 632         cb0 = kzalloc(PAGE_SIZE, GFP_ATOMIC);   /* May be called via */
 633         if (!cb0) {                             /* ehea_neq_tasklet() */
 634                 ehea_error("no mem for cb0");
 635                 ret = -ENOMEM;
 636                 goto out;
 637         }
 638
 639         hret = ehea_h_query_ehea_port(port->adapter->handle,
 640                                       port->logical_port_id, H_PORT_CB0,
 641                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 642                                       cb0);
 643         if (hret != H_SUCCESS) {
 644                 ret = -EIO;
 645                 goto out_free;
 646         }
 647
 648         /* MAC address */
 649         port->mac_addr = cb0->port_mac_addr << 16;
 650
 651         if (!is_valid_ether_addr((u8*)&port->mac_addr)) {
 652                 ret = -EADDRNOTAVAIL;
 653                 goto out_free;
 654         }
 655
 656         /* Port speed */
 657         switch (cb0->port_speed) {
 658         case H_SPEED_10M_H:
 659                 port->port_speed = EHEA_SPEED_10M;
 660                 port->full_duplex = 0;
 661                 break;
 662         case H_SPEED_10M_F:
 663                 port->port_speed = EHEA_SPEED_10M;
 664                 port->full_duplex = 1;
 665                 break;
 666         case H_SPEED_100M_H:
 667                 port->port_speed = EHEA_SPEED_100M;
 668                 port->full_duplex = 0;
 669                 break;
 670         case H_SPEED_100M_F:
 671                 port->port_speed = EHEA_SPEED_100M;
 672                 port->full_duplex = 1;
 673                 break;
 674         case H_SPEED_1G_F:
 675                 port->port_speed = EHEA_SPEED_1G;
 676                 port->full_duplex = 1;
 677                 break;
 678         case H_SPEED_10G_F:
 679                 port->port_speed = EHEA_SPEED_10G;
 680                 port->full_duplex = 1;
 681                 break;
 682         default:
 683                 port->port_speed = 0;
 684                 port->full_duplex = 0;
 685                 break;
 686         }
 687
 688         port->autoneg = 1;
 689         port->num_mcs = cb0->num_default_qps;
 690
 691         /* Number of default QPs */
 692         if (use_mcs)
 693                 port->num_def_qps = cb0->num_default_qps;
 694         else
 695                 port->num_def_qps = 1;
 696
 697         if (!port->num_def_qps) {
 698                 ret = -EINVAL;
 699                 goto out_free;
 700         }
 701
 702         port->num_tx_qps = num_tx_qps;
 703
 704         if (port->num_def_qps >= port->num_tx_qps)
 705                 port->num_add_tx_qps = 0;
 706         else
 707                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
 708
 709         ret = 0;
 710 out_free:
 711         if (ret || netif_msg_probe(port))
 712                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
 713         kfree(cb0);
 714 out:
 715         return ret;
 716 }
 717
 718 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
 719 {
 720         struct hcp_ehea_port_cb4 *cb4;
 721         u64 hret;
 722         int ret = 0;
 723
 724         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
 725         if (!cb4) {
 726                 ehea_error("no mem for cb4");
 727                 ret = -ENOMEM;
 728                 goto out;
 729         }
 730
 731         cb4->port_speed = port_speed;
 732
 733         netif_carrier_off(port->netdev);
 734
 735         hret = ehea_h_modify_ehea_port(port->adapter->handle,
 736                                        port->logical_port_id,
 737                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
 738         if (hret == H_SUCCESS) {
 739                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
 740
 741                 hret = ehea_h_query_ehea_port(port->adapter->handle,
 742                                               port->logical_port_id,
 743                                               H_PORT_CB4, H_PORT_CB4_SPEED,
 744                                               cb4);
 745                 if (hret == H_SUCCESS) {
 746                         switch (cb4->port_speed) {
 747                         case H_SPEED_10M_H:
 748                                 port->port_speed = EHEA_SPEED_10M;
 749                                 port->full_duplex = 0;
 750                                 break;
 751                         case H_SPEED_10M_F:
 752                                 port->port_speed = EHEA_SPEED_10M;
 753                                 port->full_duplex = 1;
 754                                 break;
 755                         case H_SPEED_100M_H:
 756                                 port->port_speed = EHEA_SPEED_100M;
 757                                 port->full_duplex = 0;
 758                                 break;
 759                         case H_SPEED_100M_F:
 760                                 port->port_speed = EHEA_SPEED_100M;
 761                                 port->full_duplex = 1;
 762                                 break;
 763                         case H_SPEED_1G_F:
 764                                 port->port_speed = EHEA_SPEED_1G;
 765                                 port->full_duplex = 1;
 766                                 break;
 767                         case H_SPEED_10G_F:
 768                                 port->port_speed = EHEA_SPEED_10G;
 769                                 port->full_duplex = 1;
 770                                 break;
 771                         default:
 772                                 port->port_speed = 0;
 773                                 port->full_duplex = 0;
 774                                 break;
 775                         }
 776                 } else {
 777                         ehea_error("Failed sensing port speed");
 778                         ret = -EIO;
 779                 }
 780         } else {
 781                 if (hret == H_AUTHORITY) {
 782                         ehea_info("Hypervisor denied setting port speed");
 783                         ret = -EPERM;
 784                 } else {
 785                         ret = -EIO;
 786                         ehea_error("Failed setting port speed");
 787                 }
 788         }
 789         netif_carrier_on(port->netdev);
 790         kfree(cb4);
 791 out:
 792         return ret;
 793 }
 794
 795 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
 796 {
 797         int ret;
 798         u8 ec;
 799         u8 portnum;
 800         struct ehea_port *port;
 801
 802         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
 803         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
 804         port = ehea_get_port(adapter, portnum);
 805
 806         switch (ec) {
 807         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
 808
 809                 if (!port) {
 810                         ehea_error("unknown portnum %x", portnum);
 811                         break;
 812                 }
 813
 814                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
 815                         if (!netif_carrier_ok(port->netdev)) {
 816                                 ret = ehea_sense_port_attr(port);
 817                                 if (ret) {
 818                                         ehea_error("failed resensing port "
 819                                                    "attributes");
 820                                         break;
 821                                 }
 822
 823                                 if (netif_msg_link(port))
 824                                         ehea_info("%s: Logical port up: %dMbps "
 825                                                   "%s Duplex",
 826                                                   port->netdev->name,
 827                                                   port->port_speed,
 828                                                   port->full_duplex ==
 829                                                   1 ? "Full" : "Half");
 830
 831                                 netif_carrier_on(port->netdev);
 832                                 netif_wake_queue(port->netdev);
 833                         }
 834                 } else
 835                         if (netif_carrier_ok(port->netdev)) {
 836                                 if (netif_msg_link(port))
 837                                         ehea_info("%s: Logical port down",
 838                                                   port->netdev->name);
 839                                 netif_carrier_off(port->netdev);
 840                                 netif_stop_queue(port->netdev);
 841                         }
 842
 843                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
 844                         if (netif_msg_link(port))
 845                                 ehea_info("%s: Physical port up",
 846                                           port->netdev->name);
 847                 } else {
 848                         if (netif_msg_link(port))
 849                                 ehea_info("%s: Physical port down",
 850                                           port->netdev->name);
 851                 }
 852
 853                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
 854                         ehea_info("External switch port is primary port");
 855                 else
 856                         ehea_info("External switch port is backup port");
 857
 858                 break;
 859         case EHEA_EC_ADAPTER_MALFUNC:
 860                 ehea_error("Adapter malfunction");
 861                 break;
 862         case EHEA_EC_PORT_MALFUNC:
 863                 ehea_info("Port malfunction: Device: %s", port->netdev->name);
 864                 netif_carrier_off(port->netdev);
 865                 netif_stop_queue(port->netdev);
 866                 break;
 867         default:
 868                 ehea_error("unknown event code %x, eqe=0x%lX", ec, eqe);
 869                 break;
 870         }
 871 }
 872
 873 static void ehea_neq_tasklet(unsigned long data)
 874 {
 875         struct ehea_adapter *adapter = (struct ehea_adapter*)data;
 876         struct ehea_eqe *eqe;
 877         u64 event_mask;
 878
 879         eqe = ehea_poll_eq(adapter->neq);
 880         ehea_debug("eqe=%p", eqe);
 881
 882         while (eqe) {
 883                 ehea_debug("*eqe=%lx", eqe->entry);
 884                 ehea_parse_eqe(adapter, eqe->entry);
 885                 eqe = ehea_poll_eq(adapter->neq);
 886                 ehea_debug("next eqe=%p", eqe);
 887         }
 888
 889         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
 890                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
 891                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
 892
 893         ehea_h_reset_events(adapter->handle,
 894                             adapter->neq->fw_handle, event_mask);
 895 }
 896
 897 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
 898 {
 899         struct ehea_adapter *adapter = param;
 900         tasklet_hi_schedule(&adapter->neq_tasklet);
 901         return IRQ_HANDLED;
 902 }
 903
 904
 905 static int ehea_fill_port_res(struct ehea_port_res *pr)
 906 {
 907         int ret;
 908         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
 909
 910         ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
 911                                      - init_attr->act_nr_rwqes_rq2
 912                                      - init_attr->act_nr_rwqes_rq3 - 1);
 913
 914         ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
 915
 916         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
 917
 918         return ret;
 919 }
 920
 921 static int ehea_reg_interrupts(struct net_device *dev)
 922 {
 923         struct ehea_port *port = netdev_priv(dev);
 924         struct ehea_port_res *pr;
 925         int i, ret;
 926
 927
 928         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
 929                  dev->name);
 930
 931         ret = ibmebus_request_irq(NULL, port->qp_eq->attr.ist1,
 932                                   ehea_qp_aff_irq_handler,
 933                                   IRQF_DISABLED, port->int_aff_name, port);
 934         if (ret) {
 935                 ehea_error("failed registering irq for qp_aff_irq_handler:"
 936                            "ist=%X", port->qp_eq->attr.ist1);
 937                 goto out_free_qpeq;
 938         }
 939
 940         if (netif_msg_ifup(port))
 941                 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
 942                           "registered", port->qp_eq->attr.ist1);
 943
 944
 945         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 946                 pr = &port->port_res[i];
 947                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
 948                          "%s-queue%d", dev->name, i);
 949                 ret = ibmebus_request_irq(NULL, pr->eq->attr.ist1,
 950                                           ehea_recv_irq_handler,
 951                                           IRQF_DISABLED, pr->int_send_name,
 952                                           pr);
 953                 if (ret) {
 954                         ehea_error("failed registering irq for ehea_queue "
 955                                    "port_res_nr:%d, ist=%X", i,
 956                                    pr->eq->attr.ist1);
 957                         goto out_free_req;
 958                 }
 959                 if (netif_msg_ifup(port))
 960                         ehea_info("irq_handle 0x%X for function ehea_queue_int "
 961                                   "%d registered", pr->eq->attr.ist1, i);
 962         }
 963 out:
 964         return ret;
 965
 966
 967 out_free_req:
 968         while (--i >= 0) {
 969                 u32 ist = port->port_res[i].eq->attr.ist1;
 970                 ibmebus_free_irq(NULL, ist, &port->port_res[i]);
 971         }
 972
 973 out_free_qpeq:
 974         ibmebus_free_irq(NULL, port->qp_eq->attr.ist1, port);
 975         i = port->num_def_qps;
 976
 977         goto out;
 978
 979 }
 980
 981 static void ehea_free_interrupts(struct net_device *dev)
 982 {
 983         struct ehea_port *port = netdev_priv(dev);
 984         struct ehea_port_res *pr;
 985         int i;
 986
 987         /* send */
 988
 989         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 990                 pr = &port->port_res[i];
 991                 ibmebus_free_irq(NULL, pr->eq->attr.ist1, pr);
 992                 if (netif_msg_intr(port))
 993                         ehea_info("free send irq for res %d with handle 0x%X",
 994                                   i, pr->eq->attr.ist1);
 995         }
 996
 997         /* associated events */
 998         ibmebus_free_irq(NULL, port->qp_eq->attr.ist1, port);
 999         if (netif_msg_intr(port))
1000                 ehea_info("associated event interrupt for handle 0x%X freed",
1001                           port->qp_eq->attr.ist1);
1002 }
1003
1004 static int ehea_configure_port(struct ehea_port *port)
1005 {
1006         int ret, i;
1007         u64 hret, mask;
1008         struct hcp_ehea_port_cb0 *cb0;
1009
1010         ret = -ENOMEM;
1011         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1012         if (!cb0)
1013                 goto out;
1014
1015         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1016                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1017                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1018                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1019                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1020                                       PXLY_RC_VLAN_FILTER)
1021                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1022
1023         for (i = 0; i < port->num_mcs; i++)
1024                 if (use_mcs)
1025                         cb0->default_qpn_arr[i] =
1026                                 port->port_res[i].qp->init_attr.qp_nr;
1027                 else
1028                         cb0->default_qpn_arr[i] =
1029                                 port->port_res[0].qp->init_attr.qp_nr;
1030
1031         if (netif_msg_ifup(port))
1032                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1033
1034         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1035              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1036
1037         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1038                                        port->logical_port_id,
1039                                        H_PORT_CB0, mask, cb0);
1040         ret = -EIO;
1041         if (hret != H_SUCCESS)
1042                 goto out_free;
1043
1044         ret = 0;
1045
1046 out_free:
1047         kfree(cb0);
1048 out:
1049         return ret;
1050 }
1051
1052 int ehea_gen_smrs(struct ehea_port_res *pr)
1053 {
1054         int ret;
1055         struct ehea_adapter *adapter = pr->port->adapter;
1056
1057         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1058         if (ret)
1059                 goto out;
1060
1061         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1062         if (ret)
1063                 goto out_free;
1064
1065         return 0;
1066
1067 out_free:
1068         ehea_rem_mr(&pr->send_mr);
1069 out:
1070         ehea_error("Generating SMRS failed\n");
1071         return -EIO;
1072 }
1073
1074 int ehea_rem_smrs(struct ehea_port_res *pr)
1075 {
1076         if ((ehea_rem_mr(&pr->send_mr))
1077             || (ehea_rem_mr(&pr->recv_mr)))
1078                 return -EIO;
1079         else
1080                 return 0;
1081 }
1082
1083 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1084 {
1085         int arr_size = sizeof(void*) * max_q_entries;
1086
1087         q_skba->arr = vmalloc(arr_size);
1088         if (!q_skba->arr)
1089                 return -ENOMEM;
1090
1091         memset(q_skba->arr, 0, arr_size);
1092
1093         q_skba->len = max_q_entries;
1094         q_skba->index = 0;
1095         q_skba->os_skbs = 0;
1096
1097         return 0;
1098 }
1099
1100 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1101                               struct port_res_cfg *pr_cfg, int queue_token)
1102 {
1103         struct ehea_adapter *adapter = port->adapter;
1104         enum ehea_eq_type eq_type = EHEA_EQ;
1105         struct ehea_qp_init_attr *init_attr = NULL;
1106         int ret = -EIO;
1107
1108         memset(pr, 0, sizeof(struct ehea_port_res));
1109
1110         pr->port = port;
1111         spin_lock_init(&pr->xmit_lock);
1112         spin_lock_init(&pr->netif_queue);
1113
1114         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1115         if (!pr->eq) {
1116                 ehea_error("create_eq failed (eq)");
1117                 goto out_free;
1118         }
1119
1120         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1121                                      pr->eq->fw_handle,
1122                                      port->logical_port_id);
1123         if (!pr->recv_cq) {
1124                 ehea_error("create_cq failed (cq_recv)");
1125                 goto out_free;
1126         }
1127
1128         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1129                                      pr->eq->fw_handle,
1130                                      port->logical_port_id);
1131         if (!pr->send_cq) {
1132                 ehea_error("create_cq failed (cq_send)");
1133                 goto out_free;
1134         }
1135
1136         if (netif_msg_ifup(port))
1137                 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1138                           pr->send_cq->attr.act_nr_of_cqes,
1139                           pr->recv_cq->attr.act_nr_of_cqes);
1140
1141         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1142         if (!init_attr) {
1143                 ret = -ENOMEM;
1144                 ehea_error("no mem for ehea_qp_init_attr");
1145                 goto out_free;
1146         }
1147
1148         init_attr->low_lat_rq1 = 1;
1149         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1150         init_attr->rq_count = 3;
1151         init_attr->qp_token = queue_token;
1152         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1153         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1154         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1155         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1156         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1157         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1158         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1159         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1160         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1161         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1162         init_attr->port_nr = port->logical_port_id;
1163         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1164         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1165         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1166
1167         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1168         if (!pr->qp) {
1169                 ehea_error("create_qp failed");
1170                 ret = -EIO;
1171                 goto out_free;
1172         }
1173
1174         if (netif_msg_ifup(port))
1175                 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1176                           "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1177                           init_attr->act_nr_send_wqes,
1178                           init_attr->act_nr_rwqes_rq1,
1179                           init_attr->act_nr_rwqes_rq2,
1180                           init_attr->act_nr_rwqes_rq3);
1181
1182         ret = ehea_init_q_skba(&pr->sq_skba, init_attr->act_nr_send_wqes + 1);
1183         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1184         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1185         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1186         if (ret)
1187                 goto out_free;
1188
1189         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1190         if (ehea_gen_smrs(pr) != 0) {
1191                 ret = -EIO;
1192                 goto out_free;
1193         }
1194
1195         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1196
1197         kfree(init_attr);
1198
1199         pr->d_netdev = alloc_netdev(0, "", ether_setup);
1200         if (!pr->d_netdev)
1201                 goto out_free;
1202         pr->d_netdev->priv = pr;
1203         pr->d_netdev->weight = 64;
1204         pr->d_netdev->poll = ehea_poll;
1205         set_bit(__LINK_STATE_START, &pr->d_netdev->state);
1206         strcpy(pr->d_netdev->name, port->netdev->name);
1207
1208         ret = 0;
1209         goto out;
1210
1211 out_free:
1212         kfree(init_attr);
1213         vfree(pr->sq_skba.arr);
1214         vfree(pr->rq1_skba.arr);
1215         vfree(pr->rq2_skba.arr);
1216         vfree(pr->rq3_skba.arr);
1217         ehea_destroy_qp(pr->qp);
1218         ehea_destroy_cq(pr->send_cq);
1219         ehea_destroy_cq(pr->recv_cq);
1220         ehea_destroy_eq(pr->eq);
1221 out:
1222         return ret;
1223 }
1224
1225 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1226 {
1227         int ret, i;
1228
1229         free_netdev(pr->d_netdev);
1230
1231         ret = ehea_destroy_qp(pr->qp);
1232
1233         if (!ret) {
1234                 ehea_destroy_cq(pr->send_cq);
1235                 ehea_destroy_cq(pr->recv_cq);
1236                 ehea_destroy_eq(pr->eq);
1237
1238                 for (i = 0; i < pr->rq1_skba.len; i++)
1239                         if (pr->rq1_skba.arr[i])
1240                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1241
1242                 for (i = 0; i < pr->rq2_skba.len; i++)
1243                         if (pr->rq2_skba.arr[i])
1244                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1245
1246                 for (i = 0; i < pr->rq3_skba.len; i++)
1247                         if (pr->rq3_skba.arr[i])
1248                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1249
1250                 for (i = 0; i < pr->sq_skba.len; i++)
1251                         if (pr->sq_skba.arr[i])
1252                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1253
1254                 vfree(pr->rq1_skba.arr);
1255                 vfree(pr->rq2_skba.arr);
1256                 vfree(pr->rq3_skba.arr);
1257                 vfree(pr->sq_skba.arr);
1258                 ret = ehea_rem_smrs(pr);
1259         }
1260         return ret;
1261 }
1262
1263 /*
1264  * The write_* functions store information in swqe which is used by
1265  * the hardware to calculate the ip/tcp/udp checksum
1266  */
1267
1268 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1269                                       const struct sk_buff *skb)
1270 {
1271         swqe->ip_start = skb_network_offset(skb);
1272         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1273 }
1274
1275 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1276                                         const struct sk_buff *skb)
1277 {
1278         swqe->tcp_offset =
1279                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1280
1281         swqe->tcp_end = (u16)skb->len - 1;
1282 }
1283
1284 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1285                                         const struct sk_buff *skb)
1286 {
1287         swqe->tcp_offset =
1288                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1289
1290         swqe->tcp_end = (u16)skb->len - 1;
1291 }
1292
1293
1294 static void write_swqe2_TSO(struct sk_buff *skb,
1295                             struct ehea_swqe *swqe, u32 lkey)
1296 {
1297         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1298         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1299         int skb_data_size = skb->len - skb->data_len;
1300         int headersize;
1301         u64 tmp_addr;
1302
1303         /* Packet is TCP with TSO enabled */
1304         swqe->tx_control |= EHEA_SWQE_TSO;
1305         swqe->mss = skb_shinfo(skb)->gso_size;
1306         /* copy only eth/ip/tcp headers to immediate data and
1307          * the rest of skb->data to sg1entry
1308          */
1309         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1310
1311         skb_data_size = skb->len - skb->data_len;
1312
1313         if (skb_data_size >= headersize) {
1314                 /* copy immediate data */
1315                 skb_copy_from_linear_data(skb, imm_data, headersize);
1316                 swqe->immediate_data_length = headersize;
1317
1318                 if (skb_data_size > headersize) {
1319                         /* set sg1entry data */
1320                         sg1entry->l_key = lkey;
1321                         sg1entry->len = skb_data_size - headersize;
1322
1323                         tmp_addr = (u64)(skb->data + headersize);
1324                         sg1entry->vaddr = tmp_addr;
1325                         swqe->descriptors++;
1326                 }
1327         } else
1328                 ehea_error("cannot handle fragmented headers");
1329 }
1330
1331 static void write_swqe2_nonTSO(struct sk_buff *skb,
1332                                struct ehea_swqe *swqe, u32 lkey)
1333 {
1334         int skb_data_size = skb->len - skb->data_len;
1335         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1336         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1337         u64 tmp_addr;
1338
1339         /* Packet is any nonTSO type
1340          *
1341          * Copy as much as possible skb->data to immediate data and
1342          * the rest to sg1entry
1343          */
1344         if (skb_data_size >= SWQE2_MAX_IMM) {
1345                 /* copy immediate data */
1346                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1347
1348                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1349
1350                 if (skb_data_size > SWQE2_MAX_IMM) {
1351                         /* copy sg1entry data */
1352                         sg1entry->l_key = lkey;
1353                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1354                         tmp_addr = (u64)(skb->data + SWQE2_MAX_IMM);
1355                         sg1entry->vaddr = tmp_addr;
1356                         swqe->descriptors++;
1357                 }
1358         } else {
1359                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1360                 swqe->immediate_data_length = skb_data_size;
1361         }
1362 }
1363
1364 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1365                                     struct ehea_swqe *swqe, u32 lkey)
1366 {
1367         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1368         skb_frag_t *frag;
1369         int nfrags, sg1entry_contains_frag_data, i;
1370         u64 tmp_addr;
1371
1372         nfrags = skb_shinfo(skb)->nr_frags;
1373         sg1entry = &swqe->u.immdata_desc.sg_entry;
1374         sg_list = (struct ehea_vsgentry*)&swqe->u.immdata_desc.sg_list;
1375         swqe->descriptors = 0;
1376         sg1entry_contains_frag_data = 0;
1377
1378         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1379                 write_swqe2_TSO(skb, swqe, lkey);
1380         else
1381                 write_swqe2_nonTSO(skb, swqe, lkey);
1382
1383         /* write descriptors */
1384         if (nfrags > 0) {
1385                 if (swqe->descriptors == 0) {
1386                         /* sg1entry not yet used */
1387                         frag = &skb_shinfo(skb)->frags[0];
1388
1389                         /* copy sg1entry data */
1390                         sg1entry->l_key = lkey;
1391                         sg1entry->len = frag->size;
1392                         tmp_addr =  (u64)(page_address(frag->page)
1393                                           + frag->page_offset);
1394                         sg1entry->vaddr = tmp_addr;
1395                         swqe->descriptors++;
1396                         sg1entry_contains_frag_data = 1;
1397                 }
1398
1399                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1400
1401                         frag = &skb_shinfo(skb)->frags[i];
1402                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1403
1404                         sgentry->l_key = lkey;
1405                         sgentry->len = frag->size;
1406
1407                         tmp_addr = (u64)(page_address(frag->page)
1408                                          + frag->page_offset);
1409                         sgentry->vaddr = tmp_addr;
1410                         swqe->descriptors++;
1411                 }
1412         }
1413 }
1414
1415 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1416 {
1417         int ret = 0;
1418         u64 hret;
1419         u8 reg_type;
1420
1421         /* De/Register untagged packets */
1422         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1423         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1424                                      port->logical_port_id,
1425                                      reg_type, port->mac_addr, 0, hcallid);
1426         if (hret != H_SUCCESS) {
1427                 ehea_error("reg_dereg_bcmc failed (tagged)");
1428                 ret = -EIO;
1429                 goto out_herr;
1430         }
1431
1432         /* De/Register VLAN packets */
1433         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1434         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1435                                      port->logical_port_id,
1436                                      reg_type, port->mac_addr, 0, hcallid);
1437         if (hret != H_SUCCESS) {
1438                 ehea_error("reg_dereg_bcmc failed (vlan)");
1439                 ret = -EIO;
1440         }
1441 out_herr:
1442         return ret;
1443 }
1444
1445 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1446 {
1447         struct ehea_port *port = netdev_priv(dev);
1448         struct sockaddr *mac_addr = sa;
1449         struct hcp_ehea_port_cb0 *cb0;
1450         int ret;
1451         u64 hret;
1452
1453         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1454                 ret = -EADDRNOTAVAIL;
1455                 goto out;
1456         }
1457
1458         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1459         if (!cb0) {
1460                 ehea_error("no mem for cb0");
1461                 ret = -ENOMEM;
1462                 goto out;
1463         }
1464
1465         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1466
1467         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1468
1469         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1470                                        port->logical_port_id, H_PORT_CB0,
1471                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1472         if (hret != H_SUCCESS) {
1473                 ret = -EIO;
1474                 goto out_free;
1475         }
1476
1477         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1478
1479         /* Deregister old MAC in pHYP */
1480         ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1481         if (ret)
1482                 goto out_free;
1483
1484         port->mac_addr = cb0->port_mac_addr << 16;
1485
1486         /* Register new MAC in pHYP */
1487         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1488         if (ret)
1489                 goto out_free;
1490
1491         ret = 0;
1492 out_free:
1493         kfree(cb0);
1494 out:
1495         return ret;
1496 }
1497
1498 static void ehea_promiscuous_error(u64 hret, int enable)
1499 {
1500         if (hret == H_AUTHORITY)
1501                 ehea_info("Hypervisor denied %sabling promiscuous mode",
1502                           enable == 1 ? "en" : "dis");
1503         else
1504                 ehea_error("failed %sabling promiscuous mode",
1505                            enable == 1 ? "en" : "dis");
1506 }
1507
1508 static void ehea_promiscuous(struct net_device *dev, int enable)
1509 {
1510         struct ehea_port *port = netdev_priv(dev);
1511         struct hcp_ehea_port_cb7 *cb7;
1512         u64 hret;
1513
1514         if ((enable && port->promisc) || (!enable && !port->promisc))
1515                 return;
1516
1517         cb7 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
1518         if (!cb7) {
1519                 ehea_error("no mem for cb7");
1520                 goto out;
1521         }
1522
1523         /* Modify Pxs_DUCQPN in CB7 */
1524         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1525
1526         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1527                                        port->logical_port_id,
1528                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1529         if (hret) {
1530                 ehea_promiscuous_error(hret, enable);
1531                 goto out;
1532         }
1533
1534         port->promisc = enable;
1535 out:
1536         kfree(cb7);
1537         return;
1538 }
1539
1540 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1541                                      u32 hcallid)
1542 {
1543         u64 hret;
1544         u8 reg_type;
1545
1546         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1547                  | EHEA_BCMC_UNTAGGED;
1548
1549         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1550                                      port->logical_port_id,
1551                                      reg_type, mc_mac_addr, 0, hcallid);
1552         if (hret)
1553                 goto out;
1554
1555         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1556                  | EHEA_BCMC_VLANID_ALL;
1557
1558         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1559                                      port->logical_port_id,
1560                                      reg_type, mc_mac_addr, 0, hcallid);
1561 out:
1562         return hret;
1563 }
1564
1565 static int ehea_drop_multicast_list(struct net_device *dev)
1566 {
1567         struct ehea_port *port = netdev_priv(dev);
1568         struct ehea_mc_list *mc_entry = port->mc_list;
1569         struct list_head *pos;
1570         struct list_head *temp;
1571         int ret = 0;
1572         u64 hret;
1573
1574         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1575                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1576
1577                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1578                                                  H_DEREG_BCMC);
1579                 if (hret) {
1580                         ehea_error("failed deregistering mcast MAC");
1581                         ret = -EIO;
1582                 }
1583
1584                 list_del(pos);
1585                 kfree(mc_entry);
1586         }
1587         return ret;
1588 }
1589
1590 static void ehea_allmulti(struct net_device *dev, int enable)
1591 {
1592         struct ehea_port *port = netdev_priv(dev);
1593         u64 hret;
1594
1595         if (!port->allmulti) {
1596                 if (enable) {
1597                         /* Enable ALLMULTI */
1598                         ehea_drop_multicast_list(dev);
1599                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1600                         if (!hret)
1601                                 port->allmulti = 1;
1602                         else
1603                                 ehea_error("failed enabling IFF_ALLMULTI");
1604                 }
1605         } else
1606                 if (!enable) {
1607                         /* Disable ALLMULTI */
1608                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1609                         if (!hret)
1610                                 port->allmulti = 0;
1611                         else
1612                                 ehea_error("failed disabling IFF_ALLMULTI");
1613                 }
1614 }
1615
1616 static void ehea_add_multicast_entry(struct ehea_port* port, u8* mc_mac_addr)
1617 {
1618         struct ehea_mc_list *ehea_mcl_entry;
1619         u64 hret;
1620
1621         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1622         if (!ehea_mcl_entry) {
1623                 ehea_error("no mem for mcl_entry");
1624                 return;
1625         }
1626
1627         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1628
1629         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1630
1631         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1632                                          H_REG_BCMC);
1633         if (!hret)
1634                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1635         else {
1636                 ehea_error("failed registering mcast MAC");
1637                 kfree(ehea_mcl_entry);
1638         }
1639 }
1640
1641 static void ehea_set_multicast_list(struct net_device *dev)
1642 {
1643         struct ehea_port *port = netdev_priv(dev);
1644         struct dev_mc_list *k_mcl_entry;
1645         int ret, i;
1646
1647         if (dev->flags & IFF_PROMISC) {
1648                 ehea_promiscuous(dev, 1);
1649                 return;
1650         }
1651         ehea_promiscuous(dev, 0);
1652
1653         if (dev->flags & IFF_ALLMULTI) {
1654                 ehea_allmulti(dev, 1);
1655                 return;
1656         }
1657         ehea_allmulti(dev, 0);
1658
1659         if (dev->mc_count) {
1660                 ret = ehea_drop_multicast_list(dev);
1661                 if (ret) {
1662                         /* Dropping the current multicast list failed.
1663                          * Enabling ALL_MULTI is the best we can do.
1664                          */
1665                         ehea_allmulti(dev, 1);
1666                 }
1667
1668                 if (dev->mc_count > port->adapter->max_mc_mac) {
1669                         ehea_info("Mcast registration limit reached (0x%lx). "
1670                                   "Use ALLMULTI!",
1671                                   port->adapter->max_mc_mac);
1672                         goto out;
1673                 }
1674
1675                 for (i = 0, k_mcl_entry = dev->mc_list;
1676                      i < dev->mc_count;
1677                      i++, k_mcl_entry = k_mcl_entry->next) {
1678                         ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1679                 }
1680         }
1681 out:
1682         return;
1683 }
1684
1685 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1686 {
1687         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1688                 return -EINVAL;
1689         dev->mtu = new_mtu;
1690         return 0;
1691 }
1692
1693 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1694                        struct ehea_swqe *swqe, u32 lkey)
1695 {
1696         if (skb->protocol == htons(ETH_P_IP)) {
1697                 const struct iphdr *iph = ip_hdr(skb);
1698                 /* IPv4 */
1699                 swqe->tx_control |= EHEA_SWQE_CRC
1700                                  | EHEA_SWQE_IP_CHECKSUM
1701                                  | EHEA_SWQE_TCP_CHECKSUM
1702                                  | EHEA_SWQE_IMM_DATA_PRESENT
1703                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
1704
1705                 write_ip_start_end(swqe, skb);
1706
1707                 if (iph->protocol == IPPROTO_UDP) {
1708                         if ((iph->frag_off & IP_MF) ||
1709                             (iph->frag_off & IP_OFFSET))
1710                                 /* IP fragment, so don't change cs */
1711                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
1712                         else
1713                                 write_udp_offset_end(swqe, skb);
1714
1715                 } else if (iph->protocol == IPPROTO_TCP) {
1716                         write_tcp_offset_end(swqe, skb);
1717                 }
1718
1719                 /* icmp (big data) and ip segmentation packets (all other ip
1720                    packets) do not require any special handling */
1721
1722         } else {
1723                 /* Other Ethernet Protocol */
1724                 swqe->tx_control |= EHEA_SWQE_CRC
1725                                  | EHEA_SWQE_IMM_DATA_PRESENT
1726                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
1727         }
1728
1729         write_swqe2_data(skb, dev, swqe, lkey);
1730 }
1731
1732 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
1733                        struct ehea_swqe *swqe)
1734 {
1735         int nfrags = skb_shinfo(skb)->nr_frags;
1736         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
1737         skb_frag_t *frag;
1738         int i;
1739
1740         if (skb->protocol == htons(ETH_P_IP)) {
1741                 const struct iphdr *iph = ip_hdr(skb);
1742                 /* IPv4 */
1743                 write_ip_start_end(swqe, skb);
1744
1745                 if (iph->protocol == IPPROTO_TCP) {
1746                         swqe->tx_control |= EHEA_SWQE_CRC
1747                                          | EHEA_SWQE_IP_CHECKSUM
1748                                          | EHEA_SWQE_TCP_CHECKSUM
1749                                          | EHEA_SWQE_IMM_DATA_PRESENT;
1750
1751                         write_tcp_offset_end(swqe, skb);
1752
1753                 } else if (iph->protocol == IPPROTO_UDP) {
1754                         if ((iph->frag_off & IP_MF) ||
1755                             (iph->frag_off & IP_OFFSET))
1756                                 /* IP fragment, so don't change cs */
1757                                 swqe->tx_control |= EHEA_SWQE_CRC
1758                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
1759                         else {
1760                                 swqe->tx_control |= EHEA_SWQE_CRC
1761                                                  | EHEA_SWQE_IP_CHECKSUM
1762                                                  | EHEA_SWQE_TCP_CHECKSUM
1763                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
1764
1765                                 write_udp_offset_end(swqe, skb);
1766                         }
1767                 } else {
1768                         /* icmp (big data) and
1769                            ip segmentation packets (all other ip packets) */
1770                         swqe->tx_control |= EHEA_SWQE_CRC
1771                                          | EHEA_SWQE_IP_CHECKSUM
1772                                          | EHEA_SWQE_IMM_DATA_PRESENT;
1773                 }
1774         } else {
1775                 /* Other Ethernet Protocol */
1776                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
1777         }
1778         /* copy (immediate) data */
1779         if (nfrags == 0) {
1780                 /* data is in a single piece */
1781                 skb_copy_from_linear_data(skb, imm_data, skb->len);
1782         } else {
1783                 /* first copy data from the skb->data buffer ... */
1784                 skb_copy_from_linear_data(skb, imm_data,
1785                                           skb->len - skb->data_len);
1786                 imm_data += skb->len - skb->data_len;
1787
1788                 /* ... then copy data from the fragments */
1789                 for (i = 0; i < nfrags; i++) {
1790                         frag = &skb_shinfo(skb)->frags[i];
1791                         memcpy(imm_data,
1792                                page_address(frag->page) + frag->page_offset,
1793                                frag->size);
1794                         imm_data += frag->size;
1795                 }
1796         }
1797         swqe->immediate_data_length = skb->len;
1798         dev_kfree_skb(skb);
1799 }
1800
1801 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
1802 {
1803         struct tcphdr *tcp;
1804         u32 tmp;
1805
1806         if ((skb->protocol == htons(ETH_P_IP)) &&
1807             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
1808                 tcp = (struct tcphdr*)(skb_network_header(skb) + (ip_hdr(skb)->ihl * 4));
1809                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
1810                 tmp += ip_hdr(skb)->daddr % 31;
1811                 return tmp % num_qps;
1812         }
1813         else
1814                 return 0;
1815 }
1816
1817 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
1818 {
1819         struct ehea_port *port = netdev_priv(dev);
1820         struct ehea_swqe *swqe;
1821         unsigned long flags;
1822         u32 lkey;
1823         int swqe_index;
1824         struct ehea_port_res *pr;
1825
1826         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
1827
1828         if (!spin_trylock(&pr->xmit_lock))
1829                 return NETDEV_TX_BUSY;
1830
1831         if (pr->queue_stopped) {
1832                 spin_unlock(&pr->xmit_lock);
1833                 return NETDEV_TX_BUSY;
1834         }
1835
1836         swqe = ehea_get_swqe(pr->qp, &swqe_index);
1837         memset(swqe, 0, SWQE_HEADER_SIZE);
1838         atomic_dec(&pr->swqe_avail);
1839
1840         if (skb->len <= SWQE3_MAX_IMM) {
1841                 u32 sig_iv = port->sig_comp_iv;
1842                 u32 swqe_num = pr->swqe_id_counter;
1843                 ehea_xmit3(skb, dev, swqe);
1844                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
1845                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
1846                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
1847                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
1848                                                       sig_iv);
1849                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1850                         pr->swqe_ll_count = 0;
1851                 } else
1852                         pr->swqe_ll_count += 1;
1853         } else {
1854                 swqe->wr_id =
1855                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
1856                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
1857                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
1858                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
1859                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
1860
1861                 pr->sq_skba.index++;
1862                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
1863
1864                 lkey = pr->send_mr.lkey;
1865                 ehea_xmit2(skb, dev, swqe, lkey);
1866                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1867         }
1868         pr->swqe_id_counter += 1;
1869
1870         if (port->vgrp && vlan_tx_tag_present(skb)) {
1871                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
1872                 swqe->vlan_tag = vlan_tx_tag_get(skb);
1873         }
1874
1875         if (netif_msg_tx_queued(port)) {
1876                 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
1877                 ehea_dump(swqe, 512, "swqe");
1878         }
1879
1880         ehea_post_swqe(pr->qp, swqe);
1881         pr->tx_packets++;
1882
1883         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
1884                 spin_lock_irqsave(&pr->netif_queue, flags);
1885                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
1886                         pr->p_stats.queue_stopped++;
1887                         netif_stop_queue(dev);
1888                         pr->queue_stopped = 1;
1889                 }
1890                 spin_unlock_irqrestore(&pr->netif_queue, flags);
1891         }
1892         dev->trans_start = jiffies;
1893         spin_unlock(&pr->xmit_lock);
1894
1895         return NETDEV_TX_OK;
1896 }
1897
1898 static void ehea_vlan_rx_register(struct net_device *dev,
1899                                   struct vlan_group *grp)
1900 {
1901         struct ehea_port *port = netdev_priv(dev);
1902         struct ehea_adapter *adapter = port->adapter;
1903         struct hcp_ehea_port_cb1 *cb1;
1904         u64 hret;
1905
1906         port->vgrp = grp;
1907
1908         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1909         if (!cb1) {
1910                 ehea_error("no mem for cb1");
1911                 goto out;
1912         }
1913
1914         memset(cb1->vlan_filter, 0, sizeof(cb1->vlan_filter));
1915
1916         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
1917                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
1918         if (hret != H_SUCCESS)
1919                 ehea_error("modify_ehea_port failed");
1920
1921         kfree(cb1);
1922 out:
1923         return;
1924 }
1925
1926 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
1927 {
1928         struct ehea_port *port = netdev_priv(dev);
1929         struct ehea_adapter *adapter = port->adapter;
1930         struct hcp_ehea_port_cb1 *cb1;
1931         int index;
1932         u64 hret;
1933
1934         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1935         if (!cb1) {
1936                 ehea_error("no mem for cb1");
1937                 goto out;
1938         }
1939
1940         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
1941                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
1942         if (hret != H_SUCCESS) {
1943                 ehea_error("query_ehea_port failed");
1944                 goto out;
1945         }
1946
1947         index = (vid / 64);
1948         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
1949
1950         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
1951                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
1952         if (hret != H_SUCCESS)
1953                 ehea_error("modify_ehea_port failed");
1954 out:
1955         kfree(cb1);
1956         return;
1957 }
1958
1959 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
1960 {
1961         struct ehea_port *port = netdev_priv(dev);
1962         struct ehea_adapter *adapter = port->adapter;
1963         struct hcp_ehea_port_cb1 *cb1;
1964         int index;
1965         u64 hret;
1966
1967         vlan_group_set_device(port->vgrp, vid, NULL);
1968
1969         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1970         if (!cb1) {
1971                 ehea_error("no mem for cb1");
1972                 goto out;
1973         }
1974
1975         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
1976                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
1977         if (hret != H_SUCCESS) {
1978                 ehea_error("query_ehea_port failed");
1979                 goto out;
1980         }
1981
1982         index = (vid / 64);
1983         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
1984
1985         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
1986                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
1987         if (hret != H_SUCCESS)
1988                 ehea_error("modify_ehea_port failed");
1989 out:
1990         kfree(cb1);
1991         return;
1992 }
1993
1994 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
1995 {
1996         int ret = -EIO;
1997         u64 hret;
1998         u16 dummy16 = 0;
1999         u64 dummy64 = 0;
2000         struct hcp_modify_qp_cb0* cb0;
2001
2002         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2003         if (!cb0) {
2004                 ret = -ENOMEM;
2005                 goto out;
2006         }
2007
2008         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2009                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2010         if (hret != H_SUCCESS) {
2011                 ehea_error("query_ehea_qp failed (1)");
2012                 goto out;
2013         }
2014
2015         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2016         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2017                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2018                                      &dummy64, &dummy64, &dummy16, &dummy16);
2019         if (hret != H_SUCCESS) {
2020                 ehea_error("modify_ehea_qp failed (1)");
2021                 goto out;
2022         }
2023
2024         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2025                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2026         if (hret != H_SUCCESS) {
2027                 ehea_error("query_ehea_qp failed (2)");
2028                 goto out;
2029         }
2030
2031         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2032         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2033                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2034                                      &dummy64, &dummy64, &dummy16, &dummy16);
2035         if (hret != H_SUCCESS) {
2036                 ehea_error("modify_ehea_qp failed (2)");
2037                 goto out;
2038         }
2039
2040         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2041                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2042         if (hret != H_SUCCESS) {
2043                 ehea_error("query_ehea_qp failed (3)");
2044                 goto out;
2045         }
2046
2047         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2048         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2049                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2050                                      &dummy64, &dummy64, &dummy16, &dummy16);
2051         if (hret != H_SUCCESS) {
2052                 ehea_error("modify_ehea_qp failed (3)");
2053                 goto out;
2054         }
2055
2056         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2057                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2058         if (hret != H_SUCCESS) {
2059                 ehea_error("query_ehea_qp failed (4)");
2060                 goto out;
2061         }
2062
2063         ret = 0;
2064 out:
2065         kfree(cb0);
2066         return ret;
2067 }
2068
2069 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2070                                int add_tx_qps)
2071 {
2072         int ret, i;
2073         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2074         enum ehea_eq_type eq_type = EHEA_EQ;
2075
2076         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2077                                    EHEA_MAX_ENTRIES_EQ, 1);
2078         if (!port->qp_eq) {
2079                 ret = -EINVAL;
2080                 ehea_error("ehea_create_eq failed (qp_eq)");
2081                 goto out_kill_eq;
2082         }
2083
2084         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2085         pr_cfg.max_entries_scq = sq_entries * 2;
2086         pr_cfg.max_entries_sq = sq_entries;
2087         pr_cfg.max_entries_rq1 = rq1_entries;
2088         pr_cfg.max_entries_rq2 = rq2_entries;
2089         pr_cfg.max_entries_rq3 = rq3_entries;
2090
2091         pr_cfg_small_rx.max_entries_rcq = 1;
2092         pr_cfg_small_rx.max_entries_scq = sq_entries;
2093         pr_cfg_small_rx.max_entries_sq = sq_entries;
2094         pr_cfg_small_rx.max_entries_rq1 = 1;
2095         pr_cfg_small_rx.max_entries_rq2 = 1;
2096         pr_cfg_small_rx.max_entries_rq3 = 1;
2097
2098         for (i = 0; i < def_qps; i++) {
2099                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2100                 if (ret)
2101                         goto out_clean_pr;
2102         }
2103         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2104                 ret = ehea_init_port_res(port, &port->port_res[i],
2105                                          &pr_cfg_small_rx, i);
2106                 if (ret)
2107                         goto out_clean_pr;
2108         }
2109
2110         return 0;
2111
2112 out_clean_pr:
2113         while (--i >= 0)
2114                 ehea_clean_portres(port, &port->port_res[i]);
2115
2116 out_kill_eq:
2117         ehea_destroy_eq(port->qp_eq);
2118         return ret;
2119 }
2120
2121 static int ehea_clean_all_portres(struct ehea_port *port)
2122 {
2123         int ret = 0;
2124         int i;
2125
2126         for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2127                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2128
2129         ret |= ehea_destroy_eq(port->qp_eq);
2130
2131         return ret;
2132 }
2133
2134 static void ehea_remove_adapter_mr (struct ehea_adapter *adapter)
2135 {
2136         int i;
2137
2138         for (i=0; i < EHEA_MAX_PORTS; i++)
2139                 if (adapter->port[i])
2140                         return;
2141
2142         ehea_rem_mr(&adapter->mr);
2143 }
2144
2145 static int ehea_add_adapter_mr (struct ehea_adapter *adapter)
2146 {
2147         int i;
2148
2149         for (i=0; i < EHEA_MAX_PORTS; i++)
2150                 if (adapter->port[i])
2151                         return 0;
2152
2153         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2154 }
2155
2156 static int ehea_up(struct net_device *dev)
2157 {
2158         int ret, i;
2159         struct ehea_port *port = netdev_priv(dev);
2160         u64 mac_addr = 0;
2161
2162         if (port->state == EHEA_PORT_UP)
2163                 return 0;
2164
2165         ret = ehea_port_res_setup(port, port->num_def_qps,
2166                                   port->num_add_tx_qps);
2167         if (ret) {
2168                 ehea_error("port_res_failed");
2169                 goto out;
2170         }
2171
2172         /* Set default QP for this port */
2173         ret = ehea_configure_port(port);
2174         if (ret) {
2175                 ehea_error("ehea_configure_port failed. ret:%d", ret);
2176                 goto out_clean_pr;
2177         }
2178
2179         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2180         if (ret) {
2181                 ret = -EIO;
2182                 ehea_error("out_clean_pr");
2183                 goto out_clean_pr;
2184         }
2185         mac_addr = (*(u64*)dev->dev_addr) >> 16;
2186
2187         ret = ehea_reg_interrupts(dev);
2188         if (ret) {
2189                 ehea_error("out_dereg_bc");
2190                 goto out_dereg_bc;
2191         }
2192
2193         for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2194                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2195                 if (ret) {
2196                         ehea_error("activate_qp failed");
2197                         goto out_free_irqs;
2198                 }
2199         }
2200
2201         for(i = 0; i < port->num_def_qps; i++) {
2202                 ret = ehea_fill_port_res(&port->port_res[i]);
2203                 if (ret) {
2204                         ehea_error("out_free_irqs");
2205                         goto out_free_irqs;
2206                 }
2207         }
2208
2209         ret = 0;
2210         port->state = EHEA_PORT_UP;
2211         goto out;
2212
2213 out_free_irqs:
2214         ehea_free_interrupts(dev);
2215
2216 out_dereg_bc:
2217         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2218
2219 out_clean_pr:
2220         ehea_clean_all_portres(port);
2221 out:
2222         return ret;
2223 }
2224
2225 static int ehea_open(struct net_device *dev)
2226 {
2227         int ret;
2228         struct ehea_port *port = netdev_priv(dev);
2229
2230         down(&port->port_lock);
2231
2232         if (netif_msg_ifup(port))
2233                 ehea_info("enabling port %s", dev->name);
2234
2235         ret = ehea_up(dev);
2236         if (!ret)
2237                 netif_start_queue(dev);
2238
2239         up(&port->port_lock);
2240
2241         return ret;
2242 }
2243
2244 static int ehea_down(struct net_device *dev)
2245 {
2246         int ret, i;
2247         struct ehea_port *port = netdev_priv(dev);
2248
2249         if (port->state == EHEA_PORT_DOWN)
2250                 return 0;
2251
2252         ehea_drop_multicast_list(dev);
2253         ehea_free_interrupts(dev);
2254
2255         for (i = 0; i < port->num_def_qps; i++)
2256                 while (test_bit(__LINK_STATE_RX_SCHED,
2257                                 &port->port_res[i].d_netdev->state))
2258                         msleep(1);
2259
2260         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2261         ret = ehea_clean_all_portres(port);
2262         port->state = EHEA_PORT_DOWN;
2263         return ret;
2264 }
2265
2266 static int ehea_stop(struct net_device *dev)
2267 {
2268         int ret;
2269         struct ehea_port *port = netdev_priv(dev);
2270
2271         if (netif_msg_ifdown(port))
2272                 ehea_info("disabling port %s", dev->name);
2273
2274         flush_workqueue(port->adapter->ehea_wq);
2275         down(&port->port_lock);
2276         netif_stop_queue(dev);
2277         ret = ehea_down(dev);
2278         up(&port->port_lock);
2279         return ret;
2280 }
2281
2282 static void ehea_reset_port(struct work_struct *work)
2283 {
2284         int ret;
2285         struct ehea_port *port =
2286                 container_of(work, struct ehea_port, reset_task);
2287         struct net_device *dev = port->netdev;
2288
2289         port->resets++;
2290         down(&port->port_lock);
2291         netif_stop_queue(dev);
2292         netif_poll_disable(dev);
2293
2294         ret = ehea_down(dev);
2295         if (ret)
2296                 ehea_error("ehea_down failed. not all resources are freed");
2297
2298         ret = ehea_up(dev);
2299         if (ret) {
2300                 ehea_error("Reset device %s failed: ret=%d", dev->name, ret);
2301                 goto out;
2302         }
2303
2304         if (netif_msg_timer(port))
2305                 ehea_info("Device %s resetted successfully", dev->name);
2306
2307         netif_poll_enable(dev);
2308         netif_wake_queue(dev);
2309 out:
2310         up(&port->port_lock);
2311         return;
2312 }
2313
2314 static void ehea_tx_watchdog(struct net_device *dev)
2315 {
2316         struct ehea_port *port = netdev_priv(dev);
2317
2318         if (netif_carrier_ok(dev))
2319                 queue_work(port->adapter->ehea_wq, &port->reset_task);
2320 }
2321
2322 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2323 {
2324         struct hcp_query_ehea *cb;
2325         u64 hret;
2326         int ret;
2327
2328         cb = kzalloc(PAGE_SIZE, GFP_KERNEL);
2329         if (!cb) {
2330                 ret = -ENOMEM;
2331                 goto out;
2332         }
2333
2334         hret = ehea_h_query_ehea(adapter->handle, cb);
2335
2336         if (hret != H_SUCCESS) {
2337                 ret = -EIO;
2338                 goto out_herr;
2339         }
2340
2341         adapter->max_mc_mac = cb->max_mc_mac - 1;
2342         ret = 0;
2343
2344 out_herr:
2345         kfree(cb);
2346 out:
2347         return ret;
2348 }
2349
2350 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2351 {
2352         struct hcp_ehea_port_cb4 *cb4;
2353         u64 hret;
2354         int ret = 0;
2355
2356         *jumbo = 0;
2357
2358         /* (Try to) enable *jumbo frames */
2359         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2360         if (!cb4) {
2361                 ehea_error("no mem for cb4");
2362                 ret = -ENOMEM;
2363                 goto out;
2364         } else {
2365                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2366                                               port->logical_port_id,
2367                                               H_PORT_CB4,
2368                                               H_PORT_CB4_JUMBO, cb4);
2369                 if (hret == H_SUCCESS) {
2370                         if (cb4->jumbo_frame)
2371                                 *jumbo = 1;
2372                         else {
2373                                 cb4->jumbo_frame = 1;
2374                                 hret = ehea_h_modify_ehea_port(port->adapter->
2375                                                                handle,
2376                                                                port->
2377                                                                logical_port_id,
2378                                                                H_PORT_CB4,
2379                                                                H_PORT_CB4_JUMBO,
2380                                                                cb4);
2381                                 if (hret == H_SUCCESS)
2382                                         *jumbo = 1;
2383                         }
2384                 } else
2385                         ret = -EINVAL;
2386
2387                 kfree(cb4);
2388         }
2389 out:
2390         return ret;
2391 }
2392
2393 static ssize_t ehea_show_port_id(struct device *dev,
2394                                  struct device_attribute *attr, char *buf)
2395 {
2396         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2397         return sprintf(buf, "0x%X", port->logical_port_id);
2398 }
2399
2400 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2401                    NULL);
2402
2403 static void __devinit logical_port_release(struct device *dev)
2404 {
2405         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2406         of_node_put(port->ofdev.node);
2407 }
2408
2409 static int ehea_driver_sysfs_add(struct device *dev,
2410                                  struct device_driver *driver)
2411 {
2412         int ret;
2413
2414         ret = sysfs_create_link(&driver->kobj, &dev->kobj,
2415                                 kobject_name(&dev->kobj));
2416         if (ret == 0) {
2417                 ret = sysfs_create_link(&dev->kobj, &driver->kobj,
2418                                         "driver");
2419                 if (ret)
2420                         sysfs_remove_link(&driver->kobj,
2421                                           kobject_name(&dev->kobj));
2422         }
2423         return ret;
2424 }
2425
2426 static void ehea_driver_sysfs_remove(struct device *dev,
2427                                      struct device_driver *driver)
2428 {
2429         struct device_driver *drv = driver;
2430
2431         if (drv) {
2432                 sysfs_remove_link(&drv->kobj, kobject_name(&dev->kobj));
2433                 sysfs_remove_link(&dev->kobj, "driver");
2434         }
2435 }
2436
2437 static struct device *ehea_register_port(struct ehea_port *port,
2438                                          struct device_node *dn)
2439 {
2440         int ret;
2441
2442         port->ofdev.node = of_node_get(dn);
2443         port->ofdev.dev.parent = &port->adapter->ebus_dev->ofdev.dev;
2444         port->ofdev.dev.bus = &ibmebus_bus_type;
2445
2446         sprintf(port->ofdev.dev.bus_id, "port%d", port_name_cnt++);
2447         port->ofdev.dev.release = logical_port_release;
2448
2449         ret = of_device_register(&port->ofdev);
2450         if (ret) {
2451                 ehea_error("failed to register device. ret=%d", ret);
2452                 goto out;
2453         }
2454
2455         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2456         if (ret) {
2457                 ehea_error("failed to register attributes, ret=%d", ret);
2458                 goto out_unreg_of_dev;
2459         }
2460
2461         ret = ehea_driver_sysfs_add(&port->ofdev.dev, &ehea_driver.driver);
2462         if (ret) {
2463                 ehea_error("failed to register sysfs driver link");
2464                 goto out_rem_dev_file;
2465         }
2466
2467         return &port->ofdev.dev;
2468
2469 out_rem_dev_file:
2470         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2471 out_unreg_of_dev:
2472         of_device_unregister(&port->ofdev);
2473 out:
2474         return NULL;
2475 }
2476
2477 static void ehea_unregister_port(struct ehea_port *port)
2478 {
2479         ehea_driver_sysfs_remove(&port->ofdev.dev, &ehea_driver.driver);
2480         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2481         of_device_unregister(&port->ofdev);
2482 }
2483
2484 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2485                                          u32 logical_port_id,
2486                                          struct device_node *dn)
2487 {
2488         int ret;
2489         struct net_device *dev;
2490         struct ehea_port *port;
2491         struct device *port_dev;
2492         int jumbo;
2493
2494         /* allocate memory for the port structures */
2495         dev = alloc_etherdev(sizeof(struct ehea_port));
2496
2497         if (!dev) {
2498                 ehea_error("no mem for net_device");
2499                 ret = -ENOMEM;
2500                 goto out_err;
2501         }
2502
2503         port = netdev_priv(dev);
2504
2505         sema_init(&port->port_lock, 1);
2506         port->state = EHEA_PORT_DOWN;
2507         port->sig_comp_iv = sq_entries / 10;
2508
2509         port->adapter = adapter;
2510         port->netdev = dev;
2511         port->logical_port_id = logical_port_id;
2512
2513         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2514
2515         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2516         if (!port->mc_list) {
2517                 ret = -ENOMEM;
2518                 goto out_free_ethdev;
2519         }
2520
2521         INIT_LIST_HEAD(&port->mc_list->list);
2522
2523         ret = ehea_sense_port_attr(port);
2524         if (ret)
2525                 goto out_free_mc_list;
2526
2527         port_dev = ehea_register_port(port, dn);
2528         if (!port_dev)
2529                 goto out_free_mc_list;
2530
2531         SET_NETDEV_DEV(dev, port_dev);
2532
2533         /* initialize net_device structure */
2534         SET_MODULE_OWNER(dev);
2535
2536         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
2537
2538         dev->open = ehea_open;
2539         dev->poll = ehea_poll;
2540         dev->weight = 64;
2541         dev->stop = ehea_stop;
2542         dev->hard_start_xmit = ehea_start_xmit;
2543         dev->get_stats = ehea_get_stats;
2544         dev->set_multicast_list = ehea_set_multicast_list;
2545         dev->set_mac_address = ehea_set_mac_addr;
2546         dev->change_mtu = ehea_change_mtu;
2547         dev->vlan_rx_register = ehea_vlan_rx_register;
2548         dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid;
2549         dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid;
2550         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
2551                       | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX
2552                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
2553                       | NETIF_F_LLTX;
2554         dev->tx_timeout = &ehea_tx_watchdog;
2555         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
2556
2557         INIT_WORK(&port->reset_task, ehea_reset_port);
2558
2559         ehea_set_ethtool_ops(dev);
2560
2561         ret = register_netdev(dev);
2562         if (ret) {
2563                 ehea_error("register_netdev failed. ret=%d", ret);
2564                 goto out_unreg_port;
2565         }
2566
2567         ret = ehea_get_jumboframe_status(port, &jumbo);
2568         if (ret)
2569                 ehea_error("failed determining jumbo frame status for %s",
2570                            port->netdev->name);
2571
2572         ehea_info("%s: Jumbo frames are %sabled", dev->name,
2573                   jumbo == 1 ? "en" : "dis");
2574
2575         return port;
2576
2577 out_unreg_port:
2578         ehea_unregister_port(port);
2579
2580 out_free_mc_list:
2581         kfree(port->mc_list);
2582
2583 out_free_ethdev:
2584         free_netdev(dev);
2585
2586 out_err:
2587         ehea_error("setting up logical port with id=%d failed, ret=%d",
2588                    logical_port_id, ret);
2589         return NULL;
2590 }
2591
2592 static void ehea_shutdown_single_port(struct ehea_port *port)
2593 {
2594         unregister_netdev(port->netdev);
2595         ehea_unregister_port(port);
2596         kfree(port->mc_list);
2597         free_netdev(port->netdev);
2598 }
2599
2600 static int ehea_setup_ports(struct ehea_adapter *adapter)
2601 {
2602         struct device_node *lhea_dn;
2603         struct device_node *eth_dn = NULL;
2604         const u32 *dn_log_port_id;
2605         int i = 0;
2606
2607         lhea_dn = adapter->ebus_dev->ofdev.node;
2608         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
2609
2610                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
2611                                                     NULL);
2612                 if (!dn_log_port_id) {
2613                         ehea_error("bad device node: eth_dn name=%s",
2614                                    eth_dn->full_name);
2615                         continue;
2616                 }
2617
2618                 if (ehea_add_adapter_mr(adapter)) {
2619                         ehea_error("creating MR failed");
2620                         of_node_put(eth_dn);
2621                         return -EIO;
2622                 }
2623
2624                 adapter->port[i] = ehea_setup_single_port(adapter,
2625                                                           *dn_log_port_id,
2626                                                           eth_dn);
2627                 if (adapter->port[i])
2628                         ehea_info("%s -> logical port id #%d",
2629                                   adapter->port[i]->netdev->name,
2630                                   *dn_log_port_id);
2631                 else
2632                         ehea_remove_adapter_mr(adapter);
2633
2634                 i++;
2635         };
2636
2637         return 0;
2638 }
2639
2640 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
2641                                            u32 logical_port_id)
2642 {
2643         struct device_node *lhea_dn;
2644         struct device_node *eth_dn = NULL;
2645         const u32 *dn_log_port_id;
2646
2647         lhea_dn = adapter->ebus_dev->ofdev.node;
2648         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
2649
2650                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
2651                                                     NULL);
2652                 if (dn_log_port_id)
2653                         if (*dn_log_port_id == logical_port_id)
2654                                 return eth_dn;
2655         };
2656
2657         return NULL;
2658 }
2659
2660 static ssize_t ehea_probe_port(struct device *dev,
2661                                struct device_attribute *attr,
2662                                const char *buf, size_t count)
2663 {
2664         struct ehea_adapter *adapter = dev->driver_data;
2665         struct ehea_port *port;
2666         struct device_node *eth_dn = NULL;
2667         int i;
2668
2669         u32 logical_port_id;
2670
2671         sscanf(buf, "%X", &logical_port_id);
2672
2673         port = ehea_get_port(adapter, logical_port_id);
2674
2675         if (port) {
2676                 ehea_info("adding port with logical port id=%d failed. port "
2677                           "already configured as %s.", logical_port_id,
2678                           port->netdev->name);
2679                 return -EINVAL;
2680         }
2681
2682         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
2683
2684         if (!eth_dn) {
2685                 ehea_info("no logical port with id %d found", logical_port_id);
2686                 return -EINVAL;
2687         }
2688
2689         if (ehea_add_adapter_mr(adapter)) {
2690                 ehea_error("creating MR failed");
2691                 return -EIO;
2692         }
2693
2694         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
2695
2696         of_node_put(eth_dn);
2697
2698         if (port) {
2699                 for (i=0; i < EHEA_MAX_PORTS; i++)
2700                         if (!adapter->port[i]) {
2701                                 adapter->port[i] = port;
2702                                 break;
2703                         }
2704
2705                 ehea_info("added %s (logical port id=%d)", port->netdev->name,
2706                           logical_port_id);
2707         } else {
2708                 ehea_remove_adapter_mr(adapter);
2709                 return -EIO;
2710         }
2711
2712         return (ssize_t) count;
2713 }
2714
2715 static ssize_t ehea_remove_port(struct device *dev,
2716                                 struct device_attribute *attr,
2717                                 const char *buf, size_t count)
2718 {
2719         struct ehea_adapter *adapter = dev->driver_data;
2720         struct ehea_port *port;
2721         int i;
2722         u32 logical_port_id;
2723
2724         sscanf(buf, "%X", &logical_port_id);
2725
2726         port = ehea_get_port(adapter, logical_port_id);
2727
2728         if (port) {
2729                 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
2730                           logical_port_id);
2731
2732                 ehea_shutdown_single_port(port);
2733
2734                 for (i=0; i < EHEA_MAX_PORTS; i++)
2735                         if (adapter->port[i] == port) {
2736                                 adapter->port[i] = NULL;
2737                                 break;
2738                         }
2739         } else {
2740                 ehea_error("removing port with logical port id=%d failed. port "
2741                            "not configured.", logical_port_id);
2742                 return -EINVAL;
2743         }
2744
2745         ehea_remove_adapter_mr(adapter);
2746
2747         return (ssize_t) count;
2748 }
2749
2750 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
2751 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
2752
2753 int ehea_create_device_sysfs(struct ibmebus_dev *dev)
2754 {
2755         int ret = device_create_file(&dev->ofdev.dev, &dev_attr_probe_port);
2756         if (ret)
2757                 goto out;
2758
2759         ret = device_create_file(&dev->ofdev.dev, &dev_attr_remove_port);
2760 out:
2761         return ret;
2762 }
2763
2764 void ehea_remove_device_sysfs(struct ibmebus_dev *dev)
2765 {
2766         device_remove_file(&dev->ofdev.dev, &dev_attr_probe_port);
2767         device_remove_file(&dev->ofdev.dev, &dev_attr_remove_port);
2768 }
2769
2770 static int __devinit ehea_probe_adapter(struct ibmebus_dev *dev,
2771                                         const struct of_device_id *id)
2772 {
2773         struct ehea_adapter *adapter;
2774         const u64 *adapter_handle;
2775         int ret;
2776
2777         if (!dev || !dev->ofdev.node) {
2778                 ehea_error("Invalid ibmebus device probed");
2779                 return -EINVAL;
2780         }
2781
2782         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
2783         if (!adapter) {
2784                 ret = -ENOMEM;
2785                 dev_err(&dev->ofdev.dev, "no mem for ehea_adapter\n");
2786                 goto out;
2787         }
2788
2789         adapter->ebus_dev = dev;
2790
2791         adapter_handle = of_get_property(dev->ofdev.node, "ibm,hea-handle",
2792                                             NULL);
2793         if (adapter_handle)
2794                 adapter->handle = *adapter_handle;
2795
2796         if (!adapter->handle) {
2797                 dev_err(&dev->ofdev.dev, "failed getting handle for adapter"
2798                         " '%s'\n", dev->ofdev.node->full_name);
2799                 ret = -ENODEV;
2800                 goto out_free_ad;
2801         }
2802
2803         adapter->pd = EHEA_PD_ID;
2804
2805         dev->ofdev.dev.driver_data = adapter;
2806
2807
2808         /* initialize adapter and ports */
2809         /* get adapter properties */
2810         ret = ehea_sense_adapter_attr(adapter);
2811         if (ret) {
2812                 dev_err(&dev->ofdev.dev, "sense_adapter_attr failed: %d", ret);
2813                 goto out_free_ad;
2814         }
2815
2816         adapter->neq = ehea_create_eq(adapter,
2817                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
2818         if (!adapter->neq) {
2819                 ret = -EIO;
2820                 dev_err(&dev->ofdev.dev, "NEQ creation failed");
2821                 goto out_free_ad;
2822         }
2823
2824         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
2825                      (unsigned long)adapter);
2826
2827         ret = ibmebus_request_irq(NULL, adapter->neq->attr.ist1,
2828                                   ehea_interrupt_neq, IRQF_DISABLED,
2829                                   "ehea_neq", adapter);
2830         if (ret) {
2831                 dev_err(&dev->ofdev.dev, "requesting NEQ IRQ failed");
2832                 goto out_kill_eq;
2833         }
2834
2835         adapter->ehea_wq = create_workqueue("ehea_wq");
2836         if (!adapter->ehea_wq) {
2837                 ret = -EIO;
2838                 goto out_free_irq;
2839         }
2840
2841         ret = ehea_create_device_sysfs(dev);
2842         if (ret)
2843                 goto out_kill_wq;
2844
2845         ret = ehea_setup_ports(adapter);
2846         if (ret) {
2847                 dev_err(&dev->ofdev.dev, "setup_ports failed");
2848                 goto out_rem_dev_sysfs;
2849         }
2850
2851         ret = 0;
2852         goto out;
2853
2854 out_rem_dev_sysfs:
2855         ehea_remove_device_sysfs(dev);
2856
2857 out_kill_wq:
2858         destroy_workqueue(adapter->ehea_wq);
2859
2860 out_free_irq:
2861         ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter);
2862
2863 out_kill_eq:
2864         ehea_destroy_eq(adapter->neq);
2865
2866 out_free_ad:
2867         kfree(adapter);
2868 out:
2869         return ret;
2870 }
2871
2872 static int __devexit ehea_remove(struct ibmebus_dev *dev)
2873 {
2874         struct ehea_adapter *adapter = dev->ofdev.dev.driver_data;
2875         int i;
2876
2877         for (i = 0; i < EHEA_MAX_PORTS; i++)
2878                 if (adapter->port[i]) {
2879                         ehea_shutdown_single_port(adapter->port[i]);
2880                         adapter->port[i] = NULL;
2881                 }
2882
2883         ehea_remove_device_sysfs(dev);
2884
2885         destroy_workqueue(adapter->ehea_wq);
2886
2887         ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter);
2888         tasklet_kill(&adapter->neq_tasklet);
2889
2890         ehea_destroy_eq(adapter->neq);
2891         ehea_remove_adapter_mr(adapter);
2892         kfree(adapter);
2893         return 0;
2894 }
2895
2896 static int check_module_parm(void)
2897 {
2898         int ret = 0;
2899
2900         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
2901             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
2902                 ehea_info("Bad parameter: rq1_entries");
2903                 ret = -EINVAL;
2904         }
2905         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
2906             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
2907                 ehea_info("Bad parameter: rq2_entries");
2908                 ret = -EINVAL;
2909         }
2910         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
2911             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
2912                 ehea_info("Bad parameter: rq3_entries");
2913                 ret = -EINVAL;
2914         }
2915         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
2916             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
2917                 ehea_info("Bad parameter: sq_entries");
2918                 ret = -EINVAL;
2919         }
2920
2921         return ret;
2922 }
2923
2924 int __init ehea_module_init(void)
2925 {
2926         int ret;
2927
2928         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
2929                DRV_VERSION);
2930
2931         ret = check_module_parm();
2932         if (ret)
2933                 goto out;
2934         ret = ibmebus_register_driver(&ehea_driver);
2935         if (ret)
2936                 ehea_error("failed registering eHEA device driver on ebus");
2937
2938 out:
2939         return ret;
2940 }
2941
2942 static void __exit ehea_module_exit(void)
2943 {
2944         ibmebus_unregister_driver(&ehea_driver);
2945 }
2946
2947 module_init(ehea_module_init);
2948 module_exit(ehea_module_exit);