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