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