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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
  55 module_param(msg_level, int, 0);
  56 module_param(rq1_entries, int, 0);
  57 module_param(rq2_entries, int, 0);
  58 module_param(rq3_entries, int, 0);
  59 module_param(sq_entries, int, 0);
  60
  61 MODULE_PARM_DESC(msg_level, "msg_level");
  62 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  63                  "[2^x - 1], x = [6..14]. Default = "
  64                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  65 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  66                  "[2^x - 1], x = [6..14]. Default = "
  67                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  68 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  69                  "[2^x - 1], x = [6..14]. Default = "
  70                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  71 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  72                  "[2^x - 1], x = [6..14]. Default = "
  73                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  74
  75 void ehea_dump(void *adr, int len, char *msg) {
  76         int x;
  77         unsigned char *deb = adr;
  78         for (x = 0; x < len; x += 16) {
  79                 printk(DRV_NAME "%s adr=%p ofs=%04x %016lx %016lx\n", msg,
  80                           deb, x, *((u64*)&deb[0]), *((u64*)&deb[8]));
  81                 deb += 16;
  82         }
  83 }
  84
  85 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
  86 {
  87         struct ehea_port *port = netdev_priv(dev);
  88         struct net_device_stats *stats = &port->stats;
  89         struct hcp_ehea_port_cb2 *cb2;
  90         u64 hret, rx_packets;
  91         int i;
  92
  93         memset(stats, 0, sizeof(*stats));
  94
  95         cb2 = kzalloc(PAGE_SIZE, GFP_KERNEL);
  96         if (!cb2) {
  97                 ehea_error("no mem for cb2");
  98                 goto out;
  99         }
 100
 101         hret = ehea_h_query_ehea_port(port->adapter->handle,
 102                                       port->logical_port_id,
 103                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 104         if (hret != H_SUCCESS) {
 105                 ehea_error("query_ehea_port failed");
 106                 goto out_herr;
 107         }
 108
 109         if (netif_msg_hw(port))
 110                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 111
 112         rx_packets = 0;
 113         for (i = 0; i < port->num_def_qps; i++)
 114                 rx_packets += port->port_res[i].rx_packets;
 115
 116         stats->tx_packets = cb2->txucp + cb2->txmcp + cb2->txbcp;
 117         stats->multicast = cb2->rxmcp;
 118         stats->rx_errors = cb2->rxuerr;
 119         stats->rx_bytes = cb2->rxo;
 120         stats->tx_bytes = cb2->txo;
 121         stats->rx_packets = rx_packets;
 122
 123 out_herr:
 124         kfree(cb2);
 125 out:
 126         return stats;
 127 }
 128
 129 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 130 {
 131         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 132         struct net_device *dev = pr->port->netdev;
 133         int max_index_mask = pr->rq1_skba.len - 1;
 134         int i;
 135
 136         if (!nr_of_wqes)
 137                 return;
 138
 139         for (i = 0; i < nr_of_wqes; i++) {
 140                 if (!skb_arr_rq1[index]) {
 141                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 142                                                               EHEA_L_PKT_SIZE);
 143                         if (!skb_arr_rq1[index]) {
 144                                 ehea_error("%s: no mem for skb/%d wqes filled",
 145                                            dev->name, i);
 146                                 break;
 147                         }
 148                 }
 149                 index--;
 150                 index &= max_index_mask;
 151         }
 152         /* Ring doorbell */
 153         ehea_update_rq1a(pr->qp, i);
 154 }
 155
 156 static int ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 157 {
 158         int ret = 0;
 159         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 160         struct net_device *dev = pr->port->netdev;
 161         int i;
 162
 163         for (i = 0; i < pr->rq1_skba.len; i++) {
 164                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 165                 if (!skb_arr_rq1[i]) {
 166                         ehea_error("%s: no mem for skb/%d wqes filled",
 167                                    dev->name, i);
 168                         ret = -ENOMEM;
 169                         goto out;
 170                 }
 171         }
 172         /* Ring doorbell */
 173         ehea_update_rq1a(pr->qp, nr_rq1a);
 174 out:
 175         return ret;
 176 }
 177
 178 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 179                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 180                               int num_wqes, int wqe_type, int packet_size)
 181 {
 182         struct net_device *dev = pr->port->netdev;
 183         struct ehea_qp *qp = pr->qp;
 184         struct sk_buff **skb_arr = q_skba->arr;
 185         struct ehea_rwqe *rwqe;
 186         int i, index, max_index_mask, fill_wqes;
 187         int ret = 0;
 188
 189         fill_wqes = q_skba->os_skbs + num_wqes;
 190
 191         if (!fill_wqes)
 192                 return ret;
 193
 194         index = q_skba->index;
 195         max_index_mask = q_skba->len - 1;
 196         for (i = 0; i < fill_wqes; i++) {
 197                 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
 198                 if (!skb) {
 199                         ehea_error("%s: no mem for skb/%d wqes filled",
 200                                    dev->name, i);
 201                         q_skba->os_skbs = fill_wqes - i;
 202                         ret = -ENOMEM;
 203                         break;
 204                 }
 205                 skb_reserve(skb, NET_IP_ALIGN);
 206
 207                 skb_arr[index] = skb;
 208
 209                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 210                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 211                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 212                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 213                 rwqe->sg_list[0].vaddr = (u64)skb->data;
 214                 rwqe->sg_list[0].len = packet_size;
 215                 rwqe->data_segments = 1;
 216
 217                 index++;
 218                 index &= max_index_mask;
 219         }
 220         q_skba->index = index;
 221
 222         /* Ring doorbell */
 223         iosync();
 224         if (rq_nr == 2)
 225                 ehea_update_rq2a(pr->qp, i);
 226         else
 227                 ehea_update_rq3a(pr->qp, i);
 228
 229         return ret;
 230 }
 231
 232
 233 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 234 {
 235         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 236                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 237                                   EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
 238 }
 239
 240
 241 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 242 {
 243         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 244                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 245                                   EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
 246 }
 247
 248 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 249 {
 250         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 251         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 252                 return 0;
 253         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 254             (cqe->header_length == 0))
 255                 return 0;
 256         return -EINVAL;
 257 }
 258
 259 static inline void ehea_fill_skb(struct net_device *dev,
 260                                  struct sk_buff *skb, struct ehea_cqe *cqe)
 261 {
 262         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 263
 264         skb_put(skb, length);
 265         skb->ip_summed = CHECKSUM_UNNECESSARY;
 266         skb->protocol = eth_type_trans(skb, dev);
 267 }
 268
 269 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 270                                                int arr_len,
 271                                                struct ehea_cqe *cqe)
 272 {
 273         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 274         struct sk_buff *skb;
 275         void *pref;
 276         int x;
 277
 278         x = skb_index + 1;
 279         x &= (arr_len - 1);
 280
 281         pref = skb_array[x];
 282         prefetchw(pref);
 283         prefetchw(pref + EHEA_CACHE_LINE);
 284
 285         pref = (skb_array[x]->data);
 286         prefetch(pref);
 287         prefetch(pref + EHEA_CACHE_LINE);
 288         prefetch(pref + EHEA_CACHE_LINE * 2);
 289         prefetch(pref + EHEA_CACHE_LINE * 3);
 290         skb = skb_array[skb_index];
 291         skb_array[skb_index] = NULL;
 292         return skb;
 293 }
 294
 295 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 296                                                   int arr_len, int wqe_index)
 297 {
 298         struct sk_buff *skb;
 299         void *pref;
 300         int x;
 301
 302         x = wqe_index + 1;
 303         x &= (arr_len - 1);
 304
 305         pref = skb_array[x];
 306         prefetchw(pref);
 307         prefetchw(pref + EHEA_CACHE_LINE);
 308
 309         pref = (skb_array[x]->data);
 310         prefetchw(pref);
 311         prefetchw(pref + EHEA_CACHE_LINE);
 312
 313         skb = skb_array[wqe_index];
 314         skb_array[wqe_index] = NULL;
 315         return skb;
 316 }
 317
 318 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 319                                  struct ehea_cqe *cqe, int *processed_rq2,
 320                                  int *processed_rq3)
 321 {
 322         struct sk_buff *skb;
 323
 324         if (netif_msg_rx_err(pr->port)) {
 325                 ehea_error("CQE Error for QP %d", pr->qp->init_attr.qp_nr);
 326                 ehea_dump(cqe, sizeof(*cqe), "CQE");
 327         }
 328
 329         if (rq == 2) {
 330                 *processed_rq2 += 1;
 331                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 332                 dev_kfree_skb(skb);
 333         } else if (rq == 3) {
 334                 *processed_rq3 += 1;
 335                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 336                 dev_kfree_skb(skb);
 337         }
 338
 339         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 340                 ehea_error("Critical receive error. Resetting port.");
 341                 queue_work(pr->port->adapter->ehea_wq, &pr->port->reset_task);
 342                 return 1;
 343         }
 344
 345         return 0;
 346 }
 347
 348 static int ehea_poll(struct net_device *dev, int *budget)
 349 {
 350         struct ehea_port *port = netdev_priv(dev);
 351         struct ehea_port_res *pr = &port->port_res[0];
 352         struct ehea_qp *qp = pr->qp;
 353         struct ehea_cqe *cqe;
 354         struct sk_buff *skb;
 355         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 356         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 357         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 358         int skb_arr_rq1_len = pr->rq1_skba.len;
 359         int skb_arr_rq2_len = pr->rq2_skba.len;
 360         int skb_arr_rq3_len = pr->rq3_skba.len;
 361         int processed, processed_rq1, processed_rq2, processed_rq3;
 362         int wqe_index, last_wqe_index, rq, intreq, my_quota, port_reset;
 363
 364         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 365         last_wqe_index = 0;
 366         my_quota = min(*budget, dev->quota);
 367         my_quota = min(my_quota, EHEA_POLL_MAX_RWQE);
 368
 369         /* rq0 is low latency RQ */
 370         cqe = ehea_poll_rq1(qp, &wqe_index);
 371         while ((my_quota > 0) && cqe) {
 372                 ehea_inc_rq1(qp);
 373                 processed_rq1++;
 374                 processed++;
 375                 my_quota--;
 376                 if (netif_msg_rx_status(port))
 377                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 378
 379                 last_wqe_index = wqe_index;
 380                 rmb();
 381                 if (!ehea_check_cqe(cqe, &rq)) {
 382                         if (rq == 1) {  /* LL RQ1 */
 383                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 384                                                           skb_arr_rq1_len,
 385                                                           wqe_index);
 386                                 if (unlikely(!skb)) {
 387                                         if (netif_msg_rx_err(port))
 388                                                 ehea_error("LL rq1: skb=NULL");
 389                                         skb = netdev_alloc_skb(dev,
 390                                                                EHEA_L_PKT_SIZE);
 391                                         if (!skb)
 392                                                 break;
 393                                 }
 394                                 memcpy(skb->data, ((char*)cqe) + 64,
 395                                        cqe->num_bytes_transfered - 4);
 396                                 ehea_fill_skb(dev, skb, cqe);
 397                         } else if (rq == 2) {  /* RQ2 */
 398                                 skb = get_skb_by_index(skb_arr_rq2,
 399                                                        skb_arr_rq2_len, cqe);
 400                                 if (unlikely(!skb)) {
 401                                         if (netif_msg_rx_err(port))
 402                                                 ehea_error("rq2: skb=NULL");
 403                                         break;
 404                                 }
 405                                 ehea_fill_skb(dev, skb, cqe);
 406                                 processed_rq2++;
 407                         } else {  /* RQ3 */
 408                                 skb = get_skb_by_index(skb_arr_rq3,
 409                                                        skb_arr_rq3_len, cqe);
 410                                 if (unlikely(!skb)) {
 411                                         if (netif_msg_rx_err(port))
 412                                                 ehea_error("rq3: skb=NULL");
 413                                         break;
 414                                 }
 415                                 ehea_fill_skb(dev, skb, cqe);
 416                                 processed_rq3++;
 417                         }
 418
 419                         if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 420                                 vlan_hwaccel_receive_skb(skb, port->vgrp,
 421                                                          cqe->vlan_tag);
 422                         else
 423                                 netif_receive_skb(skb);
 424
 425                 } else { /* Error occured */
 426                         pr->p_state.poll_receive_errors++;
 427                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 428                                                            &processed_rq2,
 429                                                            &processed_rq3);
 430                         if (port_reset)
 431                                 break;
 432                 }
 433                 cqe = ehea_poll_rq1(qp, &wqe_index);
 434         }
 435
 436         dev->quota -= processed;
 437         *budget -= processed;
 438
 439         pr->p_state.ehea_poll += 1;
 440         pr->rx_packets += processed;
 441
 442         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 443         ehea_refill_rq2(pr, processed_rq2);
 444         ehea_refill_rq3(pr, processed_rq3);
 445
 446         intreq = ((pr->p_state.ehea_poll & 0xF) == 0xF);
 447
 448         if (!cqe || intreq) {
 449                 netif_rx_complete(dev);
 450                 ehea_reset_cq_ep(pr->recv_cq);
 451                 ehea_reset_cq_n1(pr->recv_cq);
 452                 cqe = hw_qeit_get_valid(&qp->hw_rqueue1);
 453                 if (!cqe || intreq)
 454                         return 0;
 455                 if (!netif_rx_reschedule(dev, my_quota))
 456                         return 0;
 457         }
 458         return 1;
 459 }
 460
 461 void free_sent_skbs(struct ehea_cqe *cqe, struct ehea_port_res *pr)
 462 {
 463         struct sk_buff *skb;
 464         int index, max_index_mask, i;
 465
 466         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 467         max_index_mask = pr->sq_skba.len - 1;
 468         for (i = 0; i < EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); i++) {
 469                 skb = pr->sq_skba.arr[index];
 470                 if (likely(skb)) {
 471                         dev_kfree_skb(skb);
 472                         pr->sq_skba.arr[index] = NULL;
 473                 } else {
 474                         ehea_error("skb=NULL, wr_id=%lX, loop=%d, index=%d",
 475                                    cqe->wr_id, i, index);
 476                 }
 477                 index--;
 478                 index &= max_index_mask;
 479         }
 480 }
 481
 482 #define MAX_SENDCOMP_QUOTA 400
 483 void ehea_send_irq_tasklet(unsigned long data)
 484 {
 485         struct ehea_port_res *pr = (struct ehea_port_res*)data;
 486         struct ehea_cq *send_cq = pr->send_cq;
 487         struct ehea_cqe *cqe;
 488         int quota = MAX_SENDCOMP_QUOTA;
 489         int cqe_counter = 0;
 490         int swqe_av = 0;
 491         unsigned long flags;
 492
 493         do {
 494                 cqe = ehea_poll_cq(send_cq);
 495                 if (!cqe) {
 496                         ehea_reset_cq_ep(send_cq);
 497                         ehea_reset_cq_n1(send_cq);
 498                         cqe = ehea_poll_cq(send_cq);
 499                         if (!cqe)
 500                                 break;
 501                 }
 502                 cqe_counter++;
 503                 rmb();
 504                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 505                         ehea_error("Send Completion Error: Resetting port");
 506                         if (netif_msg_tx_err(pr->port))
 507                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 508                         queue_work(pr->port->adapter->ehea_wq,
 509                                    &pr->port->reset_task);
 510                         break;
 511                 }
 512
 513                 if (netif_msg_tx_done(pr->port))
 514                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 515
 516                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 517                            == EHEA_SWQE2_TYPE))
 518                         free_sent_skbs(cqe, pr);
 519
 520                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 521                 quota--;
 522         } while (quota > 0);
 523
 524         ehea_update_feca(send_cq, cqe_counter);
 525         atomic_add(swqe_av, &pr->swqe_avail);
 526
 527         spin_lock_irqsave(&pr->netif_queue, flags);
 528         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 529                                   >= pr->swqe_refill_th)) {
 530                 netif_wake_queue(pr->port->netdev);
 531                 pr->queue_stopped = 0;
 532         }
 533         spin_unlock_irqrestore(&pr->netif_queue, flags);
 534
 535         if (unlikely(cqe))
 536                 tasklet_hi_schedule(&pr->send_comp_task);
 537 }
 538
 539 static irqreturn_t ehea_send_irq_handler(int irq, void *param)
 540 {
 541         struct ehea_port_res *pr = param;
 542         tasklet_hi_schedule(&pr->send_comp_task);
 543         return IRQ_HANDLED;
 544 }
 545
 546 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 547 {
 548         struct ehea_port_res *pr = param;
 549         struct ehea_port *port = pr->port;
 550         netif_rx_schedule(port->netdev);
 551         return IRQ_HANDLED;
 552 }
 553
 554 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 555 {
 556         struct ehea_port *port = param;
 557         struct ehea_eqe *eqe;
 558         u32 qp_token;
 559
 560         eqe = ehea_poll_eq(port->qp_eq);
 561         ehea_debug("eqe=%p", eqe);
 562         while (eqe) {
 563                 ehea_debug("*eqe=%lx", *(u64*)eqe);
 564                 eqe = ehea_poll_eq(port->qp_eq);
 565                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 566                 ehea_debug("next eqe=%p", eqe);
 567         }
 568
 569         return IRQ_HANDLED;
 570 }
 571
 572 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 573                                        int logical_port)
 574 {
 575         int i;
 576
 577         for (i = 0; i < adapter->num_ports; i++)
 578                 if (adapter->port[i]->logical_port_id == logical_port)
 579                         return adapter->port[i];
 580         return NULL;
 581 }
 582
 583 int ehea_sense_port_attr(struct ehea_port *port)
 584 {
 585         int ret;
 586         u64 hret;
 587         struct hcp_ehea_port_cb0 *cb0;
 588
 589         cb0 = kzalloc(PAGE_SIZE, GFP_ATOMIC);   /* May be called via */
 590         if (!cb0) {                             /* ehea_neq_tasklet() */
 591                 ehea_error("no mem for cb0");
 592                 ret = -ENOMEM;
 593                 goto out;
 594         }
 595
 596         hret = ehea_h_query_ehea_port(port->adapter->handle,
 597                                       port->logical_port_id, H_PORT_CB0,
 598                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 599                                       cb0);
 600         if (hret != H_SUCCESS) {
 601                 ret = -EIO;
 602                 goto out_free;
 603         }
 604
 605         /* MAC address */
 606         port->mac_addr = cb0->port_mac_addr << 16;
 607
 608         if (!is_valid_ether_addr((u8*)&port->mac_addr)) {
 609                 ret = -EADDRNOTAVAIL;
 610                 goto out_free;
 611         }
 612
 613         /* Port speed */
 614         switch (cb0->port_speed) {
 615         case H_SPEED_10M_H:
 616                 port->port_speed = EHEA_SPEED_10M;
 617                 port->full_duplex = 0;
 618                 break;
 619         case H_SPEED_10M_F:
 620                 port->port_speed = EHEA_SPEED_10M;
 621                 port->full_duplex = 1;
 622                 break;
 623         case H_SPEED_100M_H:
 624                 port->port_speed = EHEA_SPEED_100M;
 625                 port->full_duplex = 0;
 626                 break;
 627         case H_SPEED_100M_F:
 628                 port->port_speed = EHEA_SPEED_100M;
 629                 port->full_duplex = 1;
 630                 break;
 631         case H_SPEED_1G_F:
 632                 port->port_speed = EHEA_SPEED_1G;
 633                 port->full_duplex = 1;
 634                 break;
 635         case H_SPEED_10G_F:
 636                 port->port_speed = EHEA_SPEED_10G;
 637                 port->full_duplex = 1;
 638                 break;
 639         default:
 640                 port->port_speed = 0;
 641                 port->full_duplex = 0;
 642                 break;
 643         }
 644
 645         /* Number of default QPs */
 646         port->num_def_qps = cb0->num_default_qps;
 647
 648         if (!port->num_def_qps) {
 649                 ret = -EINVAL;
 650                 goto out_free;
 651         }
 652
 653         if (port->num_def_qps >= EHEA_NUM_TX_QP)
 654                 port->num_add_tx_qps = 0;
 655         else
 656                 port->num_add_tx_qps = EHEA_NUM_TX_QP - port->num_def_qps;
 657
 658         ret = 0;
 659 out_free:
 660         if (ret || netif_msg_probe(port))
 661                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
 662         kfree(cb0);
 663 out:
 664         return ret;
 665 }
 666
 667 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
 668 {
 669         struct hcp_ehea_port_cb4 *cb4;
 670         u64 hret;
 671         int ret = 0;
 672
 673         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
 674         if (!cb4) {
 675                 ehea_error("no mem for cb4");
 676                 ret = -ENOMEM;
 677                 goto out;
 678         }
 679
 680         cb4->port_speed = port_speed;
 681
 682         netif_carrier_off(port->netdev);
 683
 684         hret = ehea_h_modify_ehea_port(port->adapter->handle,
 685                                        port->logical_port_id,
 686                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
 687         if (hret == H_SUCCESS) {
 688                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
 689
 690                 hret = ehea_h_query_ehea_port(port->adapter->handle,
 691                                               port->logical_port_id,
 692                                               H_PORT_CB4, H_PORT_CB4_SPEED,
 693                                               cb4);
 694                 if (hret == H_SUCCESS) {
 695                         switch (cb4->port_speed) {
 696                         case H_SPEED_10M_H:
 697                                 port->port_speed = EHEA_SPEED_10M;
 698                                 port->full_duplex = 0;
 699                                 break;
 700                         case H_SPEED_10M_F:
 701                                 port->port_speed = EHEA_SPEED_10M;
 702                                 port->full_duplex = 1;
 703                                 break;
 704                         case H_SPEED_100M_H:
 705                                 port->port_speed = EHEA_SPEED_100M;
 706                                 port->full_duplex = 0;
 707                                 break;
 708                         case H_SPEED_100M_F:
 709                                 port->port_speed = EHEA_SPEED_100M;
 710                                 port->full_duplex = 1;
 711                                 break;
 712                         case H_SPEED_1G_F:
 713                                 port->port_speed = EHEA_SPEED_1G;
 714                                 port->full_duplex = 1;
 715                                 break;
 716                         case H_SPEED_10G_F:
 717                                 port->port_speed = EHEA_SPEED_10G;
 718                                 port->full_duplex = 1;
 719                                 break;
 720                         default:
 721                                 port->port_speed = 0;
 722                                 port->full_duplex = 0;
 723                                 break;
 724                         }
 725                 } else {
 726                         ehea_error("Failed sensing port speed");
 727                         ret = -EIO;
 728                 }
 729         } else {
 730                 if (hret == H_AUTHORITY) {
 731                         ehea_info("Hypervisor denied setting port speed. Either"
 732                                   " this partition is not authorized to set "
 733                                   "port speed or another partition has modified"
 734                                   " port speed first.");
 735                         ret = -EPERM;
 736                 } else {
 737                         ret = -EIO;
 738                         ehea_error("Failed setting port speed");
 739                 }
 740         }
 741         netif_carrier_on(port->netdev);
 742         kfree(cb4);
 743 out:
 744         return ret;
 745 }
 746
 747 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
 748 {
 749         int ret;
 750         u8 ec;
 751         u8 portnum;
 752         struct ehea_port *port;
 753
 754         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
 755         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
 756         port = ehea_get_port(adapter, portnum);
 757
 758         switch (ec) {
 759         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
 760
 761                 if (!port) {
 762                         ehea_error("unknown portnum %x", portnum);
 763                         break;
 764                 }
 765
 766                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
 767                         if (!netif_carrier_ok(port->netdev)) {
 768                                 ret = ehea_sense_port_attr(port);
 769                                 if (ret) {
 770                                         ehea_error("failed resensing port "
 771                                                    "attributes");
 772                                         break;
 773                                 }
 774
 775                                 if (netif_msg_link(port))
 776                                         ehea_info("%s: Logical port up: %dMbps "
 777                                                   "%s Duplex",
 778                                                   port->netdev->name,
 779                                                   port->port_speed,
 780                                                   port->full_duplex ==
 781                                                   1 ? "Full" : "Half");
 782
 783                                 netif_carrier_on(port->netdev);
 784                                 netif_wake_queue(port->netdev);
 785                         }
 786                 } else
 787                         if (netif_carrier_ok(port->netdev)) {
 788                                 if (netif_msg_link(port))
 789                                         ehea_info("%s: Logical port down",
 790                                                   port->netdev->name);
 791                                 netif_carrier_off(port->netdev);
 792                                 netif_stop_queue(port->netdev);
 793                         }
 794
 795                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
 796                         if (netif_msg_link(port))
 797                                 ehea_info("%s: Physical port up",
 798                                           port->netdev->name);
 799                 } else {
 800                         if (netif_msg_link(port))
 801                                 ehea_info("%s: Physical port down",
 802                                           port->netdev->name);
 803                 }
 804
 805                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
 806                         ehea_info("External switch port is primary port");
 807                 else
 808                         ehea_info("External switch port is backup port");
 809
 810                 break;
 811         case EHEA_EC_ADAPTER_MALFUNC:
 812                 ehea_error("Adapter malfunction");
 813                 break;
 814         case EHEA_EC_PORT_MALFUNC:
 815                 ehea_info("Port malfunction: Device: %s", port->netdev->name);
 816                 netif_carrier_off(port->netdev);
 817                 netif_stop_queue(port->netdev);
 818                 break;
 819         default:
 820                 ehea_error("unknown event code %x, eqe=0x%lX", ec, eqe);
 821                 break;
 822         }
 823 }
 824
 825 static void ehea_neq_tasklet(unsigned long data)
 826 {
 827         struct ehea_adapter *adapter = (struct ehea_adapter*)data;
 828         struct ehea_eqe *eqe;
 829         u64 event_mask;
 830
 831         eqe = ehea_poll_eq(adapter->neq);
 832         ehea_debug("eqe=%p", eqe);
 833
 834         while (eqe) {
 835                 ehea_debug("*eqe=%lx", eqe->entry);
 836                 ehea_parse_eqe(adapter, eqe->entry);
 837                 eqe = ehea_poll_eq(adapter->neq);
 838                 ehea_debug("next eqe=%p", eqe);
 839         }
 840
 841         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
 842                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
 843                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
 844
 845         ehea_h_reset_events(adapter->handle,
 846                             adapter->neq->fw_handle, event_mask);
 847 }
 848
 849 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
 850 {
 851         struct ehea_adapter *adapter = param;
 852         tasklet_hi_schedule(&adapter->neq_tasklet);
 853         return IRQ_HANDLED;
 854 }
 855
 856
 857 static int ehea_fill_port_res(struct ehea_port_res *pr)
 858 {
 859         int ret;
 860         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
 861
 862         ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
 863                                      - init_attr->act_nr_rwqes_rq2
 864                                      - init_attr->act_nr_rwqes_rq3 - 1);
 865
 866         ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
 867
 868         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
 869
 870         return ret;
 871 }
 872
 873 static int ehea_reg_interrupts(struct net_device *dev)
 874 {
 875         struct ehea_port *port = netdev_priv(dev);
 876         struct ehea_port_res *pr;
 877         int i, ret;
 878
 879         for (i = 0; i < port->num_def_qps; i++) {
 880                 pr = &port->port_res[i];
 881                 snprintf(pr->int_recv_name, EHEA_IRQ_NAME_SIZE - 1
 882                          , "%s-recv%d", dev->name, i);
 883                 ret = ibmebus_request_irq(NULL, pr->recv_eq->attr.ist1,
 884                                           ehea_recv_irq_handler,
 885                                           SA_INTERRUPT, pr->int_recv_name, pr);
 886                 if (ret) {
 887                         ehea_error("failed registering irq for ehea_recv_int:"
 888                                    "port_res_nr:%d, ist=%X", i,
 889                                    pr->recv_eq->attr.ist1);
 890                         goto out_free_seq;
 891                 }
 892                 if (netif_msg_ifup(port))
 893                         ehea_info("irq_handle 0x%X for funct ehea_recv_int %d "
 894                                   "registered", pr->recv_eq->attr.ist1, i);
 895         }
 896
 897         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
 898                  dev->name);
 899
 900         ret = ibmebus_request_irq(NULL, port->qp_eq->attr.ist1,
 901                                   ehea_qp_aff_irq_handler,
 902                                   SA_INTERRUPT, port->int_aff_name, port);
 903         if (ret) {
 904                 ehea_error("failed registering irq for qp_aff_irq_handler:"
 905                            "ist=%X", port->qp_eq->attr.ist1);
 906                 goto out_free_qpeq;
 907         }
 908
 909         if (netif_msg_ifup(port))
 910                 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
 911                           "registered", port->qp_eq->attr.ist1);
 912
 913         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 914                 pr = &port->port_res[i];
 915                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
 916                          "%s-send%d", dev->name, i);
 917                 ret = ibmebus_request_irq(NULL, pr->send_eq->attr.ist1,
 918                                           ehea_send_irq_handler,
 919                                           SA_INTERRUPT, pr->int_send_name,
 920                                           pr);
 921                 if (ret) {
 922                         ehea_error("failed registering irq for ehea_send "
 923                                    "port_res_nr:%d, ist=%X", i,
 924                                    pr->send_eq->attr.ist1);
 925                         goto out_free_req;
 926                 }
 927                 if (netif_msg_ifup(port))
 928                         ehea_info("irq_handle 0x%X for function ehea_send_int "
 929                                   "%d registered", pr->send_eq->attr.ist1, i);
 930         }
 931 out:
 932         return ret;
 933
 934 out_free_req:
 935         while (--i >= 0) {
 936                 u32 ist = port->port_res[i].send_eq->attr.ist1;
 937                 ibmebus_free_irq(NULL, ist, &port->port_res[i]);
 938         }
 939 out_free_qpeq:
 940         ibmebus_free_irq(NULL, port->qp_eq->attr.ist1, port);
 941         i = port->num_def_qps;
 942 out_free_seq:
 943         while (--i >= 0) {
 944                 u32 ist = port->port_res[i].recv_eq->attr.ist1;
 945                 ibmebus_free_irq(NULL, ist, &port->port_res[i]);
 946         }
 947         goto out;
 948 }
 949
 950 static void ehea_free_interrupts(struct net_device *dev)
 951 {
 952         struct ehea_port *port = netdev_priv(dev);
 953         struct ehea_port_res *pr;
 954         int i;
 955
 956         /* send */
 957         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 958                 pr = &port->port_res[i];
 959                 ibmebus_free_irq(NULL, pr->send_eq->attr.ist1, pr);
 960                 if (netif_msg_intr(port))
 961                         ehea_info("free send irq for res %d with handle 0x%X",
 962                                   i, pr->send_eq->attr.ist1);
 963         }
 964
 965         /* receive */
 966         for (i = 0; i < port->num_def_qps; i++) {
 967                 pr = &port->port_res[i];
 968                 ibmebus_free_irq(NULL, pr->recv_eq->attr.ist1, pr);
 969                 if (netif_msg_intr(port))
 970                         ehea_info("free recv irq for res %d with handle 0x%X",
 971                                   i, pr->recv_eq->attr.ist1);
 972         }
 973
 974         /* associated events */
 975         ibmebus_free_irq(NULL, port->qp_eq->attr.ist1, port);
 976         if (netif_msg_intr(port))
 977                 ehea_info("associated event interrupt for handle 0x%X freed",
 978                           port->qp_eq->attr.ist1);
 979 }
 980
 981 static int ehea_configure_port(struct ehea_port *port)
 982 {
 983         int ret, i;
 984         u64 hret, mask;
 985         struct hcp_ehea_port_cb0 *cb0;
 986
 987         ret = -ENOMEM;
 988         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
 989         if (!cb0)
 990                 goto out;
 991
 992         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
 993                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
 994                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
 995                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
 996                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
 997                                       PXLY_RC_VLAN_FILTER)
 998                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
 999
1000         for (i = 0; i < port->num_def_qps; i++)
1001                 cb0->default_qpn_arr[i] = port->port_res[i].qp->init_attr.qp_nr;
1002
1003         if (netif_msg_ifup(port))
1004                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1005
1006         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1007              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1008
1009         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1010                                        port->logical_port_id,
1011                                        H_PORT_CB0, mask, cb0);
1012         ret = -EIO;
1013         if (hret != H_SUCCESS)
1014                 goto out_free;
1015
1016         ret = 0;
1017
1018 out_free:
1019         kfree(cb0);
1020 out:
1021         return ret;
1022 }
1023
1024 static int ehea_gen_smrs(struct ehea_port_res *pr)
1025 {
1026         u64 hret;
1027         struct ehea_adapter *adapter = pr->port->adapter;
1028
1029         hret = ehea_h_register_smr(adapter->handle, adapter->mr.handle,
1030                                    adapter->mr.vaddr, EHEA_MR_ACC_CTRL,
1031                                    adapter->pd, &pr->send_mr);
1032         if (hret != H_SUCCESS)
1033                 goto out;
1034
1035         hret = ehea_h_register_smr(adapter->handle, adapter->mr.handle,
1036                                    adapter->mr.vaddr, EHEA_MR_ACC_CTRL,
1037                                    adapter->pd, &pr->recv_mr);
1038         if (hret != H_SUCCESS)
1039                 goto out_freeres;
1040
1041         return 0;
1042
1043 out_freeres:
1044         hret = ehea_h_free_resource(adapter->handle, pr->send_mr.handle);
1045         if (hret != H_SUCCESS)
1046                 ehea_error("failed freeing SMR");
1047 out:
1048         return -EIO;
1049 }
1050
1051 static int ehea_rem_smrs(struct ehea_port_res *pr)
1052 {
1053         struct ehea_adapter *adapter = pr->port->adapter;
1054         int ret = 0;
1055         u64 hret;
1056
1057         hret = ehea_h_free_resource(adapter->handle, pr->send_mr.handle);
1058         if (hret != H_SUCCESS) {
1059                 ret = -EIO;
1060                 ehea_error("failed freeing send SMR for pr=%p", pr);
1061         }
1062
1063         hret = ehea_h_free_resource(adapter->handle, pr->recv_mr.handle);
1064         if (hret != H_SUCCESS) {
1065                 ret = -EIO;
1066                 ehea_error("failed freeing recv SMR for pr=%p", pr);
1067         }
1068
1069         return ret;
1070 }
1071
1072 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1073 {
1074         int arr_size = sizeof(void*) * max_q_entries;
1075
1076         q_skba->arr = vmalloc(arr_size);
1077         if (!q_skba->arr)
1078                 return -ENOMEM;
1079
1080         memset(q_skba->arr, 0, arr_size);
1081
1082         q_skba->len = max_q_entries;
1083         q_skba->index = 0;
1084         q_skba->os_skbs = 0;
1085
1086         return 0;
1087 }
1088
1089 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1090                               struct port_res_cfg *pr_cfg, int queue_token)
1091 {
1092         struct ehea_adapter *adapter = port->adapter;
1093         enum ehea_eq_type eq_type = EHEA_EQ;
1094         struct ehea_qp_init_attr *init_attr = NULL;
1095         int ret = -EIO;
1096
1097         memset(pr, 0, sizeof(struct ehea_port_res));
1098
1099         pr->port = port;
1100         spin_lock_init(&pr->send_lock);
1101         spin_lock_init(&pr->recv_lock);
1102         spin_lock_init(&pr->xmit_lock);
1103         spin_lock_init(&pr->netif_queue);
1104
1105         pr->recv_eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1106         if (!pr->recv_eq) {
1107                 ehea_error("create_eq failed (recv_eq)");
1108                 goto out_free;
1109         }
1110
1111         pr->send_eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1112         if (!pr->send_eq) {
1113                 ehea_error("create_eq failed (send_eq)");
1114                 goto out_free;
1115         }
1116
1117         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1118                                      pr->recv_eq->fw_handle,
1119                                      port->logical_port_id);
1120         if (!pr->recv_cq) {
1121                 ehea_error("create_cq failed (cq_recv)");
1122                 goto out_free;
1123         }
1124
1125         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1126                                      pr->send_eq->fw_handle,
1127                                      port->logical_port_id);
1128         if (!pr->send_cq) {
1129                 ehea_error("create_cq failed (cq_send)");
1130                 goto out_free;
1131         }
1132
1133         if (netif_msg_ifup(port))
1134                 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1135                           pr->send_cq->attr.act_nr_of_cqes,
1136                           pr->recv_cq->attr.act_nr_of_cqes);
1137
1138         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1139         if (!init_attr) {
1140                 ret = -ENOMEM;
1141                 ehea_error("no mem for ehea_qp_init_attr");
1142                 goto out_free;
1143         }
1144
1145         init_attr->low_lat_rq1 = 1;
1146         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1147         init_attr->rq_count = 3;
1148         init_attr->qp_token = queue_token;
1149         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1150         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1151         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1152         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1153         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1154         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1155         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1156         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1157         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1158         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1159         init_attr->port_nr = port->logical_port_id;
1160         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1161         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1162         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1163
1164         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1165         if (!pr->qp) {
1166                 ehea_error("create_qp failed");
1167                 ret = -EIO;
1168                 goto out_free;
1169         }
1170
1171         if (netif_msg_ifup(port))
1172                 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1173                           "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1174                           init_attr->act_nr_send_wqes,
1175                           init_attr->act_nr_rwqes_rq1,
1176                           init_attr->act_nr_rwqes_rq2,
1177                           init_attr->act_nr_rwqes_rq3);
1178
1179         ret = ehea_init_q_skba(&pr->sq_skba, init_attr->act_nr_send_wqes + 1);
1180         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1181         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1182         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1183         if (ret)
1184                 goto out_free;
1185
1186         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1187         if (ehea_gen_smrs(pr) != 0) {
1188                 ret = -EIO;
1189                 goto out_free;
1190         }
1191         tasklet_init(&pr->send_comp_task, ehea_send_irq_tasklet,
1192                      (unsigned long)pr);
1193         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1194
1195         kfree(init_attr);
1196         ret = 0;
1197         goto out;
1198
1199 out_free:
1200         kfree(init_attr);
1201         vfree(pr->sq_skba.arr);
1202         vfree(pr->rq1_skba.arr);
1203         vfree(pr->rq2_skba.arr);
1204         vfree(pr->rq3_skba.arr);
1205         ehea_destroy_qp(pr->qp);
1206         ehea_destroy_cq(pr->send_cq);
1207         ehea_destroy_cq(pr->recv_cq);
1208         ehea_destroy_eq(pr->send_eq);
1209         ehea_destroy_eq(pr->recv_eq);
1210 out:
1211         return ret;
1212 }
1213
1214 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1215 {
1216         int ret, i;
1217
1218         ret = ehea_destroy_qp(pr->qp);
1219
1220         if (!ret) {
1221                 ehea_destroy_cq(pr->send_cq);
1222                 ehea_destroy_cq(pr->recv_cq);
1223                 ehea_destroy_eq(pr->send_eq);
1224                 ehea_destroy_eq(pr->recv_eq);
1225
1226                 for (i = 0; i < pr->rq1_skba.len; i++)
1227                         if (pr->rq1_skba.arr[i])
1228                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1229
1230                 for (i = 0; i < pr->rq2_skba.len; i++)
1231                         if (pr->rq2_skba.arr[i])
1232                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1233
1234                 for (i = 0; i < pr->rq3_skba.len; i++)
1235                         if (pr->rq3_skba.arr[i])
1236                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1237
1238                 for (i = 0; i < pr->sq_skba.len; i++)
1239                         if (pr->sq_skba.arr[i])
1240                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1241
1242                 vfree(pr->rq1_skba.arr);
1243                 vfree(pr->rq2_skba.arr);
1244                 vfree(pr->rq3_skba.arr);
1245                 vfree(pr->sq_skba.arr);
1246                 ret = ehea_rem_smrs(pr);
1247         }
1248         return ret;
1249 }
1250
1251 /*
1252  * The write_* functions store information in swqe which is used by
1253  * the hardware to calculate the ip/tcp/udp checksum
1254  */
1255
1256 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1257                                       const struct sk_buff *skb)
1258 {
1259         swqe->ip_start = (u8)(((u64)skb->nh.iph) - ((u64)skb->data));
1260         swqe->ip_end = (u8)(swqe->ip_start + skb->nh.iph->ihl * 4 - 1);
1261 }
1262
1263 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1264                                         const struct sk_buff *skb)
1265 {
1266         swqe->tcp_offset =
1267                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1268
1269         swqe->tcp_end = (u16)skb->len - 1;
1270 }
1271
1272 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1273                                         const struct sk_buff *skb)
1274 {
1275         swqe->tcp_offset =
1276                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1277
1278         swqe->tcp_end = (u16)skb->len - 1;
1279 }
1280
1281
1282 static void write_swqe2_TSO(struct sk_buff *skb,
1283                             struct ehea_swqe *swqe, u32 lkey)
1284 {
1285         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1286         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1287         int skb_data_size = skb->len - skb->data_len;
1288         int headersize;
1289         u64 tmp_addr;
1290
1291         /* Packet is TCP with TSO enabled */
1292         swqe->tx_control |= EHEA_SWQE_TSO;
1293         swqe->mss = skb_shinfo(skb)->gso_size;
1294         /* copy only eth/ip/tcp headers to immediate data and
1295          * the rest of skb->data to sg1entry
1296          */
1297         headersize = ETH_HLEN + (skb->nh.iph->ihl * 4) + (skb->h.th->doff * 4);
1298
1299         skb_data_size = skb->len - skb->data_len;
1300
1301         if (skb_data_size >= headersize) {
1302                 /* copy immediate data */
1303                 memcpy(imm_data, skb->data, headersize);
1304                 swqe->immediate_data_length = headersize;
1305
1306                 if (skb_data_size > headersize) {
1307                         /* set sg1entry data */
1308                         sg1entry->l_key = lkey;
1309                         sg1entry->len = skb_data_size - headersize;
1310
1311                         tmp_addr = (u64)(skb->data + headersize);
1312                         sg1entry->vaddr = tmp_addr;
1313                         swqe->descriptors++;
1314                 }
1315         } else
1316                 ehea_error("cannot handle fragmented headers");
1317 }
1318
1319 static void write_swqe2_nonTSO(struct sk_buff *skb,
1320                                struct ehea_swqe *swqe, u32 lkey)
1321 {
1322         int skb_data_size = skb->len - skb->data_len;
1323         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1324         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1325         u64 tmp_addr;
1326
1327         /* Packet is any nonTSO type
1328          *
1329          * Copy as much as possible skb->data to immediate data and
1330          * the rest to sg1entry
1331          */
1332         if (skb_data_size >= SWQE2_MAX_IMM) {
1333                 /* copy immediate data */
1334                 memcpy(imm_data, skb->data, SWQE2_MAX_IMM);
1335
1336                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1337
1338                 if (skb_data_size > SWQE2_MAX_IMM) {
1339                         /* copy sg1entry data */
1340                         sg1entry->l_key = lkey;
1341                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1342                         tmp_addr = (u64)(skb->data + SWQE2_MAX_IMM);
1343                         sg1entry->vaddr = tmp_addr;
1344                         swqe->descriptors++;
1345                 }
1346         } else {
1347                 memcpy(imm_data, skb->data, skb_data_size);
1348                 swqe->immediate_data_length = skb_data_size;
1349         }
1350 }
1351
1352 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1353                                     struct ehea_swqe *swqe, u32 lkey)
1354 {
1355         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1356         skb_frag_t *frag;
1357         int nfrags, sg1entry_contains_frag_data, i;
1358         u64 tmp_addr;
1359
1360         nfrags = skb_shinfo(skb)->nr_frags;
1361         sg1entry = &swqe->u.immdata_desc.sg_entry;
1362         sg_list = (struct ehea_vsgentry*)&swqe->u.immdata_desc.sg_list;
1363         swqe->descriptors = 0;
1364         sg1entry_contains_frag_data = 0;
1365
1366         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1367                 write_swqe2_TSO(skb, swqe, lkey);
1368         else
1369                 write_swqe2_nonTSO(skb, swqe, lkey);
1370
1371         /* write descriptors */
1372         if (nfrags > 0) {
1373                 if (swqe->descriptors == 0) {
1374                         /* sg1entry not yet used */
1375                         frag = &skb_shinfo(skb)->frags[0];
1376
1377                         /* copy sg1entry data */
1378                         sg1entry->l_key = lkey;
1379                         sg1entry->len = frag->size;
1380                         tmp_addr =  (u64)(page_address(frag->page)
1381                                           + frag->page_offset);
1382                         sg1entry->vaddr = tmp_addr;
1383                         swqe->descriptors++;
1384                         sg1entry_contains_frag_data = 1;
1385                 }
1386
1387                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1388
1389                         frag = &skb_shinfo(skb)->frags[i];
1390                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1391
1392                         sgentry->l_key = lkey;
1393                         sgentry->len = frag->size;
1394
1395                         tmp_addr = (u64)(page_address(frag->page)
1396                                          + frag->page_offset);
1397                         sgentry->vaddr = tmp_addr;
1398                         swqe->descriptors++;
1399                 }
1400         }
1401 }
1402
1403 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1404 {
1405         int ret = 0;
1406         u64 hret;
1407         u8 reg_type;
1408
1409         /* De/Register untagged packets */
1410         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1411         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1412                                      port->logical_port_id,
1413                                      reg_type, port->mac_addr, 0, hcallid);
1414         if (hret != H_SUCCESS) {
1415                 ehea_error("reg_dereg_bcmc failed (tagged)");
1416                 ret = -EIO;
1417                 goto out_herr;
1418         }
1419
1420         /* De/Register VLAN packets */
1421         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1422         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1423                                      port->logical_port_id,
1424                                      reg_type, port->mac_addr, 0, hcallid);
1425         if (hret != H_SUCCESS) {
1426                 ehea_error("reg_dereg_bcmc failed (vlan)");
1427                 ret = -EIO;
1428         }
1429 out_herr:
1430         return ret;
1431 }
1432
1433 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1434 {
1435         struct ehea_port *port = netdev_priv(dev);
1436         struct sockaddr *mac_addr = sa;
1437         struct hcp_ehea_port_cb0 *cb0;
1438         int ret;
1439         u64 hret;
1440
1441         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1442                 ret = -EADDRNOTAVAIL;
1443                 goto out;
1444         }
1445
1446         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1447         if (!cb0) {
1448                 ehea_error("no mem for cb0");
1449                 ret = -ENOMEM;
1450                 goto out;
1451         }
1452
1453         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1454
1455         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1456
1457         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1458                                        port->logical_port_id, H_PORT_CB0,
1459                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1460         if (hret != H_SUCCESS) {
1461                 ret = -EIO;
1462                 goto out_free;
1463         }
1464
1465         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1466
1467         /* Deregister old MAC in pHYP */
1468         ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1469         if (ret)
1470                 goto out_free;
1471
1472         port->mac_addr = cb0->port_mac_addr << 16;
1473
1474         /* Register new MAC in pHYP */
1475         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1476         if (ret)
1477                 goto out_free;
1478
1479         ret = 0;
1480 out_free:
1481         kfree(cb0);
1482 out:
1483         return ret;
1484 }
1485
1486 static void ehea_promiscuous_error(u64 hret, int enable)
1487 {
1488         ehea_info("Hypervisor denied %sabling promiscuous mode.%s",
1489                   enable == 1 ? "en" : "dis",
1490                   hret != H_AUTHORITY ? "" : " Another partition owning a "
1491                   "logical port on the same physical port might have altered "
1492                   "promiscuous mode first.");
1493 }
1494
1495 static void ehea_promiscuous(struct net_device *dev, int enable)
1496 {
1497         struct ehea_port *port = netdev_priv(dev);
1498         struct hcp_ehea_port_cb7 *cb7;
1499         u64 hret;
1500
1501         if ((enable && port->promisc) || (!enable && !port->promisc))
1502                 return;
1503
1504         cb7 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
1505         if (!cb7) {
1506                 ehea_error("no mem for cb7");
1507                 goto out;
1508         }
1509
1510         /* Modify Pxs_DUCQPN in CB7 */
1511         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1512
1513         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1514                                        port->logical_port_id,
1515                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1516         if (hret) {
1517                 ehea_promiscuous_error(hret, enable);
1518                 goto out;
1519         }
1520
1521         port->promisc = enable;
1522 out:
1523         kfree(cb7);
1524         return;
1525 }
1526
1527 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1528                                      u32 hcallid)
1529 {
1530         u64 hret;
1531         u8 reg_type;
1532
1533         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1534                  | EHEA_BCMC_UNTAGGED;
1535
1536         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1537                                      port->logical_port_id,
1538                                      reg_type, mc_mac_addr, 0, hcallid);
1539         if (hret)
1540                 goto out;
1541
1542         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1543                  | EHEA_BCMC_VLANID_ALL;
1544
1545         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1546                                      port->logical_port_id,
1547                                      reg_type, mc_mac_addr, 0, hcallid);
1548 out:
1549         return hret;
1550 }
1551
1552 static int ehea_drop_multicast_list(struct net_device *dev)
1553 {
1554         struct ehea_port *port = netdev_priv(dev);
1555         struct ehea_mc_list *mc_entry = port->mc_list;
1556         struct list_head *pos;
1557         struct list_head *temp;
1558         int ret = 0;
1559         u64 hret;
1560
1561         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1562                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1563
1564                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1565                                                  H_DEREG_BCMC);
1566                 if (hret) {
1567                         ehea_error("failed deregistering mcast MAC");
1568                         ret = -EIO;
1569                 }
1570
1571                 list_del(pos);
1572                 kfree(mc_entry);
1573         }
1574         return ret;
1575 }
1576
1577 static void ehea_allmulti(struct net_device *dev, int enable)
1578 {
1579         struct ehea_port *port = netdev_priv(dev);
1580         u64 hret;
1581
1582         if (!port->allmulti) {
1583                 if (enable) {
1584                         /* Enable ALLMULTI */
1585                         ehea_drop_multicast_list(dev);
1586                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1587                         if (!hret)
1588                                 port->allmulti = 1;
1589                         else
1590                                 ehea_error("failed enabling IFF_ALLMULTI");
1591                 }
1592         } else
1593                 if (!enable) {
1594                         /* Disable ALLMULTI */
1595                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1596                         if (!hret)
1597                                 port->allmulti = 0;
1598                         else
1599                                 ehea_error("failed disabling IFF_ALLMULTI");
1600                 }
1601 }
1602
1603 static void ehea_add_multicast_entry(struct ehea_port* port, u8* mc_mac_addr)
1604 {
1605         struct ehea_mc_list *ehea_mcl_entry;
1606         u64 hret;
1607
1608         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1609         if (!ehea_mcl_entry) {
1610                 ehea_error("no mem for mcl_entry");
1611                 return;
1612         }
1613
1614         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1615
1616         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1617
1618         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1619                                          H_REG_BCMC);
1620         if (!hret)
1621                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1622         else {
1623                 ehea_error("failed registering mcast MAC");
1624                 kfree(ehea_mcl_entry);
1625         }
1626 }
1627
1628 static void ehea_set_multicast_list(struct net_device *dev)
1629 {
1630         struct ehea_port *port = netdev_priv(dev);
1631         struct dev_mc_list *k_mcl_entry;
1632         int ret, i;
1633
1634         if (dev->flags & IFF_PROMISC) {
1635                 ehea_promiscuous(dev, 1);
1636                 return;
1637         }
1638         ehea_promiscuous(dev, 0);
1639
1640         if (dev->flags & IFF_ALLMULTI) {
1641                 ehea_allmulti(dev, 1);
1642                 return;
1643         }
1644         ehea_allmulti(dev, 0);
1645
1646         if (dev->mc_count) {
1647                 ret = ehea_drop_multicast_list(dev);
1648                 if (ret) {
1649                         /* Dropping the current multicast list failed.
1650                          * Enabling ALL_MULTI is the best we can do.
1651                          */
1652                         ehea_allmulti(dev, 1);
1653                 }
1654
1655                 if (dev->mc_count > port->adapter->max_mc_mac) {
1656                         ehea_info("Mcast registration limit reached (0x%lx). "
1657                                   "Use ALLMULTI!",
1658                                   port->adapter->max_mc_mac);
1659                         goto out;
1660                 }
1661
1662                 for (i = 0, k_mcl_entry = dev->mc_list;
1663                      i < dev->mc_count;
1664                      i++, k_mcl_entry = k_mcl_entry->next) {
1665                         ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1666                 }
1667         }
1668 out:
1669         return;
1670 }
1671
1672 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1673 {
1674         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1675                 return -EINVAL;
1676         dev->mtu = new_mtu;
1677         return 0;
1678 }
1679
1680 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1681                        struct ehea_swqe *swqe, u32 lkey)
1682 {
1683         if (skb->protocol == htons(ETH_P_IP)) {
1684                 /* IPv4 */
1685                 swqe->tx_control |= EHEA_SWQE_CRC
1686                                  | EHEA_SWQE_IP_CHECKSUM
1687                                  | EHEA_SWQE_TCP_CHECKSUM
1688                                  | EHEA_SWQE_IMM_DATA_PRESENT
1689                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
1690
1691                 write_ip_start_end(swqe, skb);
1692
1693                 if (skb->nh.iph->protocol == IPPROTO_UDP) {
1694                         if ((skb->nh.iph->frag_off & IP_MF) ||
1695                             (skb->nh.iph->frag_off & IP_OFFSET))
1696                                 /* IP fragment, so don't change cs */
1697                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
1698                         else
1699                                 write_udp_offset_end(swqe, skb);
1700
1701                 } else if (skb->nh.iph->protocol == IPPROTO_TCP) {
1702                         write_tcp_offset_end(swqe, skb);
1703                 }
1704
1705                 /* icmp (big data) and ip segmentation packets (all other ip
1706                    packets) do not require any special handling */
1707
1708         } else {
1709                 /* Other Ethernet Protocol */
1710                 swqe->tx_control |= EHEA_SWQE_CRC
1711                                  | EHEA_SWQE_IMM_DATA_PRESENT
1712                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
1713         }
1714
1715         write_swqe2_data(skb, dev, swqe, lkey);
1716 }
1717
1718 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
1719                        struct ehea_swqe *swqe)
1720 {
1721         int nfrags = skb_shinfo(skb)->nr_frags;
1722         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
1723         skb_frag_t *frag;
1724         int i;
1725
1726         if (skb->protocol == htons(ETH_P_IP)) {
1727                 /* IPv4 */
1728                 write_ip_start_end(swqe, skb);
1729
1730                 if (skb->nh.iph->protocol == IPPROTO_TCP) {
1731                         swqe->tx_control |= EHEA_SWQE_CRC
1732                                          | EHEA_SWQE_IP_CHECKSUM
1733                                          | EHEA_SWQE_TCP_CHECKSUM
1734                                          | EHEA_SWQE_IMM_DATA_PRESENT;
1735
1736                         write_tcp_offset_end(swqe, skb);
1737
1738                 } else if (skb->nh.iph->protocol == IPPROTO_UDP) {
1739                         if ((skb->nh.iph->frag_off & IP_MF) ||
1740                             (skb->nh.iph->frag_off & IP_OFFSET))
1741                                 /* IP fragment, so don't change cs */
1742                                 swqe->tx_control |= EHEA_SWQE_CRC
1743                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
1744                         else {
1745                                 swqe->tx_control |= EHEA_SWQE_CRC
1746                                                  | EHEA_SWQE_IP_CHECKSUM
1747                                                  | EHEA_SWQE_TCP_CHECKSUM
1748                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
1749
1750                                 write_udp_offset_end(swqe, skb);
1751                         }
1752                 } else {
1753                         /* icmp (big data) and
1754                            ip segmentation packets (all other ip packets) */
1755                         swqe->tx_control |= EHEA_SWQE_CRC
1756                                          | EHEA_SWQE_IP_CHECKSUM
1757                                          | EHEA_SWQE_IMM_DATA_PRESENT;
1758                 }
1759         } else {
1760                 /* Other Ethernet Protocol */
1761                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
1762         }
1763         /* copy (immediate) data */
1764         if (nfrags == 0) {
1765                 /* data is in a single piece */
1766                 memcpy(imm_data, skb->data, skb->len);
1767         } else {
1768                 /* first copy data from the skb->data buffer ... */
1769                 memcpy(imm_data, skb->data, skb->len - skb->data_len);
1770                 imm_data += skb->len - skb->data_len;
1771
1772                 /* ... then copy data from the fragments */
1773                 for (i = 0; i < nfrags; i++) {
1774                         frag = &skb_shinfo(skb)->frags[i];
1775                         memcpy(imm_data,
1776                                page_address(frag->page) + frag->page_offset,
1777                                frag->size);
1778                         imm_data += frag->size;
1779                 }
1780         }
1781         swqe->immediate_data_length = skb->len;
1782         dev_kfree_skb(skb);
1783 }
1784
1785 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
1786 {
1787         struct ehea_port *port = netdev_priv(dev);
1788         struct ehea_swqe *swqe;
1789         unsigned long flags;
1790         u32 lkey;
1791         int swqe_index;
1792         struct ehea_port_res *pr = &port->port_res[0];
1793
1794         spin_lock(&pr->xmit_lock);
1795
1796         swqe = ehea_get_swqe(pr->qp, &swqe_index);
1797         memset(swqe, 0, SWQE_HEADER_SIZE);
1798         atomic_dec(&pr->swqe_avail);
1799
1800         if (skb->len <= SWQE3_MAX_IMM) {
1801                 u32 sig_iv = port->sig_comp_iv;
1802                 u32 swqe_num = pr->swqe_id_counter;
1803                 ehea_xmit3(skb, dev, swqe);
1804                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
1805                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
1806                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
1807                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
1808                                                       sig_iv);
1809                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1810                         pr->swqe_ll_count = 0;
1811                 } else
1812                         pr->swqe_ll_count += 1;
1813         } else {
1814                 swqe->wr_id =
1815                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
1816                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
1817                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
1818                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
1819
1820                 pr->sq_skba.index++;
1821                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
1822
1823                 lkey = pr->send_mr.lkey;
1824                 ehea_xmit2(skb, dev, swqe, lkey);
1825
1826                 if (pr->swqe_count >= (EHEA_SIG_IV_LONG - 1)) {
1827                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
1828                                                       EHEA_SIG_IV_LONG);
1829                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1830                         pr->swqe_count = 0;
1831                 } else
1832                         pr->swqe_count += 1;
1833         }
1834         pr->swqe_id_counter += 1;
1835
1836         if (port->vgrp && vlan_tx_tag_present(skb)) {
1837                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
1838                 swqe->vlan_tag = vlan_tx_tag_get(skb);
1839         }
1840
1841         if (netif_msg_tx_queued(port)) {
1842                 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
1843                 ehea_dump(swqe, 512, "swqe");
1844         }
1845
1846         ehea_post_swqe(pr->qp, swqe);
1847         pr->tx_packets++;
1848
1849         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
1850                 spin_lock_irqsave(&pr->netif_queue, flags);
1851                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
1852                         netif_stop_queue(dev);
1853                         pr->queue_stopped = 1;
1854                 }
1855                 spin_unlock_irqrestore(&pr->netif_queue, flags);
1856         }
1857         dev->trans_start = jiffies;
1858         spin_unlock(&pr->xmit_lock);
1859
1860         return NETDEV_TX_OK;
1861 }
1862
1863 static void ehea_vlan_rx_register(struct net_device *dev,
1864                                   struct vlan_group *grp)
1865 {
1866         struct ehea_port *port = netdev_priv(dev);
1867         struct ehea_adapter *adapter = port->adapter;
1868         struct hcp_ehea_port_cb1 *cb1;
1869         u64 hret;
1870
1871         port->vgrp = grp;
1872
1873         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1874         if (!cb1) {
1875                 ehea_error("no mem for cb1");
1876                 goto out;
1877         }
1878
1879         if (grp)
1880                 memset(cb1->vlan_filter, 0, sizeof(cb1->vlan_filter));
1881         else
1882                 memset(cb1->vlan_filter, 0xFF, sizeof(cb1->vlan_filter));
1883
1884         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
1885                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
1886         if (hret != H_SUCCESS)
1887                 ehea_error("modify_ehea_port failed");
1888
1889         kfree(cb1);
1890 out:
1891         return;
1892 }
1893
1894 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
1895 {
1896         struct ehea_port *port = netdev_priv(dev);
1897         struct ehea_adapter *adapter = port->adapter;
1898         struct hcp_ehea_port_cb1 *cb1;
1899         int index;
1900         u64 hret;
1901
1902         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1903         if (!cb1) {
1904                 ehea_error("no mem for cb1");
1905                 goto out;
1906         }
1907
1908         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
1909                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
1910         if (hret != H_SUCCESS) {
1911                 ehea_error("query_ehea_port failed");
1912                 goto out;
1913         }
1914
1915         index = (vid / 64);
1916         cb1->vlan_filter[index] |= ((u64)(1 << (vid & 0x3F)));
1917
1918         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
1919                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
1920         if (hret != H_SUCCESS)
1921                 ehea_error("modify_ehea_port failed");
1922 out:
1923         kfree(cb1);
1924         return;
1925 }
1926
1927 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
1928 {
1929         struct ehea_port *port = netdev_priv(dev);
1930         struct ehea_adapter *adapter = port->adapter;
1931         struct hcp_ehea_port_cb1 *cb1;
1932         int index;
1933         u64 hret;
1934
1935         if (port->vgrp)
1936                 port->vgrp->vlan_devices[vid] = NULL;
1937
1938         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1939         if (!cb1) {
1940                 ehea_error("no mem for cb1");
1941                 goto out;
1942         }
1943
1944         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
1945                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
1946         if (hret != H_SUCCESS) {
1947                 ehea_error("query_ehea_port failed");
1948                 goto out;
1949         }
1950
1951         index = (vid / 64);
1952         cb1->vlan_filter[index] &= ~((u64)(1 << (vid & 0x3F)));
1953
1954         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
1955                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
1956         if (hret != H_SUCCESS)
1957                 ehea_error("modify_ehea_port failed");
1958 out:
1959         kfree(cb1);
1960         return;
1961 }
1962
1963 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
1964 {
1965         int ret = -EIO;
1966         u64 hret;
1967         u16 dummy16 = 0;
1968         u64 dummy64 = 0;
1969         struct hcp_modify_qp_cb0* cb0;
1970
1971         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1972         if (!cb0) {
1973                 ret = -ENOMEM;
1974                 goto out;
1975         }
1976
1977         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
1978                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
1979         if (hret != H_SUCCESS) {
1980                 ehea_error("query_ehea_qp failed (1)");
1981                 goto out;
1982         }
1983
1984         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
1985         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
1986                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
1987                                      &dummy64, &dummy64, &dummy16, &dummy16);
1988         if (hret != H_SUCCESS) {
1989                 ehea_error("modify_ehea_qp failed (1)");
1990                 goto out;
1991         }
1992
1993         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
1994                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
1995         if (hret != H_SUCCESS) {
1996                 ehea_error("query_ehea_qp failed (2)");
1997                 goto out;
1998         }
1999
2000         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2001         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2002                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2003                                      &dummy64, &dummy64, &dummy16, &dummy16);
2004         if (hret != H_SUCCESS) {
2005                 ehea_error("modify_ehea_qp failed (2)");
2006                 goto out;
2007         }
2008
2009         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2010                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2011         if (hret != H_SUCCESS) {
2012                 ehea_error("query_ehea_qp failed (3)");
2013                 goto out;
2014         }
2015
2016         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2017         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2018                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2019                                      &dummy64, &dummy64, &dummy16, &dummy16);
2020         if (hret != H_SUCCESS) {
2021                 ehea_error("modify_ehea_qp failed (3)");
2022                 goto out;
2023         }
2024
2025         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2026                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2027         if (hret != H_SUCCESS) {
2028                 ehea_error("query_ehea_qp failed (4)");
2029                 goto out;
2030         }
2031
2032         ret = 0;
2033 out:
2034         kfree(cb0);
2035         return ret;
2036 }
2037
2038 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2039                                int add_tx_qps)
2040 {
2041         int ret, i;
2042         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2043         enum ehea_eq_type eq_type = EHEA_EQ;
2044
2045         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2046                                    EHEA_MAX_ENTRIES_EQ, 1);
2047         if (!port->qp_eq) {
2048                 ret = -EINVAL;
2049                 ehea_error("ehea_create_eq failed (qp_eq)");
2050                 goto out_kill_eq;
2051         }
2052
2053         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2054         pr_cfg.max_entries_scq = sq_entries;
2055         pr_cfg.max_entries_sq = sq_entries;
2056         pr_cfg.max_entries_rq1 = rq1_entries;
2057         pr_cfg.max_entries_rq2 = rq2_entries;
2058         pr_cfg.max_entries_rq3 = rq3_entries;
2059
2060         pr_cfg_small_rx.max_entries_rcq = 1;
2061         pr_cfg_small_rx.max_entries_scq = sq_entries;
2062         pr_cfg_small_rx.max_entries_sq = sq_entries;
2063         pr_cfg_small_rx.max_entries_rq1 = 1;
2064         pr_cfg_small_rx.max_entries_rq2 = 1;
2065         pr_cfg_small_rx.max_entries_rq3 = 1;
2066
2067         for (i = 0; i < def_qps; i++) {
2068                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2069                 if (ret)
2070                         goto out_clean_pr;
2071         }
2072         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2073                 ret = ehea_init_port_res(port, &port->port_res[i],
2074                                          &pr_cfg_small_rx, i);
2075                 if (ret)
2076                         goto out_clean_pr;
2077         }
2078
2079         return 0;
2080
2081 out_clean_pr:
2082         while (--i >= 0)
2083                 ehea_clean_portres(port, &port->port_res[i]);
2084
2085 out_kill_eq:
2086         ehea_destroy_eq(port->qp_eq);
2087         return ret;
2088 }
2089
2090 static int ehea_clean_all_portres(struct ehea_port *port)
2091 {
2092         int ret = 0;
2093         int i;
2094
2095         for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2096                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2097
2098         ret |= ehea_destroy_eq(port->qp_eq);
2099
2100         return ret;
2101 }
2102
2103 static int ehea_up(struct net_device *dev)
2104 {
2105         int ret, i;
2106         struct ehea_port *port = netdev_priv(dev);
2107         u64 mac_addr = 0;
2108
2109         if (port->state == EHEA_PORT_UP)
2110                 return 0;
2111
2112         ret = ehea_port_res_setup(port, port->num_def_qps,
2113                                   port->num_add_tx_qps);
2114         if (ret) {
2115                 ehea_error("port_res_failed");
2116                 goto out;
2117         }
2118
2119         /* Set default QP for this port */
2120         ret = ehea_configure_port(port);
2121         if (ret) {
2122                 ehea_error("ehea_configure_port failed. ret:%d", ret);
2123                 goto out_clean_pr;
2124         }
2125
2126         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2127         if (ret) {
2128                 ret = -EIO;
2129                 ehea_error("out_clean_pr");
2130                 goto out_clean_pr;
2131         }
2132         mac_addr = (*(u64*)dev->dev_addr) >> 16;
2133
2134         ret = ehea_reg_interrupts(dev);
2135         if (ret) {
2136                 ehea_error("out_dereg_bc");
2137                 goto out_dereg_bc;
2138         }
2139
2140         for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2141                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2142                 if (ret) {
2143                         ehea_error("activate_qp failed");
2144                         goto out_free_irqs;
2145                 }
2146         }
2147
2148         for(i = 0; i < port->num_def_qps; i++) {
2149                 ret = ehea_fill_port_res(&port->port_res[i]);
2150                 if (ret) {
2151                         ehea_error("out_free_irqs");
2152                         goto out_free_irqs;
2153                 }
2154         }
2155
2156         ret = 0;
2157         port->state = EHEA_PORT_UP;
2158         goto out;
2159
2160 out_free_irqs:
2161         ehea_free_interrupts(dev);
2162
2163 out_dereg_bc:
2164         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2165
2166 out_clean_pr:
2167         ehea_clean_all_portres(port);
2168 out:
2169         return ret;
2170 }
2171
2172 static int ehea_open(struct net_device *dev)
2173 {
2174         int ret;
2175         struct ehea_port *port = netdev_priv(dev);
2176
2177         down(&port->port_lock);
2178
2179         if (netif_msg_ifup(port))
2180                 ehea_info("enabling port %s", dev->name);
2181
2182         ret = ehea_up(dev);
2183         if (!ret)
2184                 netif_start_queue(dev);
2185
2186         up(&port->port_lock);
2187
2188         return ret;
2189 }
2190
2191 static int ehea_down(struct net_device *dev)
2192 {
2193         int ret, i;
2194         struct ehea_port *port = netdev_priv(dev);
2195
2196         if (port->state == EHEA_PORT_DOWN)
2197                 return 0;
2198
2199         ehea_drop_multicast_list(dev);
2200         ehea_free_interrupts(dev);
2201
2202         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2203                 tasklet_kill(&port->port_res[i].send_comp_task);
2204
2205         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2206         ret = ehea_clean_all_portres(port);
2207         port->state = EHEA_PORT_DOWN;
2208         return ret;
2209 }
2210
2211 static int ehea_stop(struct net_device *dev)
2212 {
2213         int ret;
2214         struct ehea_port *port = netdev_priv(dev);
2215
2216         if (netif_msg_ifdown(port))
2217                 ehea_info("disabling port %s", dev->name);
2218
2219         flush_workqueue(port->adapter->ehea_wq);
2220         down(&port->port_lock);
2221         netif_stop_queue(dev);
2222         ret = ehea_down(dev);
2223         up(&port->port_lock);
2224         return ret;
2225 }
2226
2227 static void ehea_reset_port(void *data)
2228 {
2229         int ret;
2230         struct net_device *dev = data;
2231         struct ehea_port *port = netdev_priv(dev);
2232
2233         port->resets++;
2234         down(&port->port_lock);
2235         netif_stop_queue(dev);
2236         netif_poll_disable(dev);
2237
2238         ret = ehea_down(dev);
2239         if (ret)
2240                 ehea_error("ehea_down failed. not all resources are freed");
2241
2242         ret = ehea_up(dev);
2243         if (ret) {
2244                 ehea_error("Reset device %s failed: ret=%d", dev->name, ret);
2245                 goto out;
2246         }
2247
2248         if (netif_msg_timer(port))
2249                 ehea_info("Device %s resetted successfully", dev->name);
2250
2251         netif_poll_enable(dev);
2252         netif_wake_queue(dev);
2253 out:
2254         up(&port->port_lock);
2255         return;
2256 }
2257
2258 static void ehea_tx_watchdog(struct net_device *dev)
2259 {
2260         struct ehea_port *port = netdev_priv(dev);
2261
2262         if (netif_carrier_ok(dev))
2263                 queue_work(port->adapter->ehea_wq, &port->reset_task);
2264 }
2265
2266 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2267 {
2268         struct hcp_query_ehea *cb;
2269         u64 hret;
2270         int ret;
2271
2272         cb = kzalloc(PAGE_SIZE, GFP_KERNEL);
2273         if (!cb) {
2274                 ret = -ENOMEM;
2275                 goto out;
2276         }
2277
2278         hret = ehea_h_query_ehea(adapter->handle, cb);
2279
2280         if (hret != H_SUCCESS) {
2281                 ret = -EIO;
2282                 goto out_herr;
2283         }
2284
2285         adapter->num_ports = cb->num_ports;
2286         adapter->max_mc_mac = cb->max_mc_mac - 1;
2287         ret = 0;
2288
2289 out_herr:
2290         kfree(cb);
2291 out:
2292         return ret;
2293 }
2294
2295 static int ehea_setup_single_port(struct ehea_port *port,
2296                                   struct device_node *dn)
2297 {
2298         int ret;
2299         u64 hret;
2300         struct net_device *dev = port->netdev;
2301         struct ehea_adapter *adapter = port->adapter;
2302         struct hcp_ehea_port_cb4 *cb4;
2303         u32 *dn_log_port_id;
2304
2305         sema_init(&port->port_lock, 1);
2306         port->state = EHEA_PORT_DOWN;
2307         port->sig_comp_iv = sq_entries / 10;
2308
2309         if (!dn) {
2310                 ehea_error("bad device node: dn=%p", dn);
2311                 ret = -EINVAL;
2312                 goto out;
2313         }
2314
2315         port->of_dev_node = dn;
2316
2317         /* Determine logical port id */
2318         dn_log_port_id = (u32*)get_property(dn, "ibm,hea-port-no", NULL);
2319
2320         if (!dn_log_port_id) {
2321                 ehea_error("bad device node: dn_log_port_id=%p",
2322                            dn_log_port_id);
2323                 ret = -EINVAL;
2324                 goto out;
2325         }
2326         port->logical_port_id = *dn_log_port_id;
2327
2328         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2329         if (!port->mc_list) {
2330                 ret = -ENOMEM;
2331                 goto out;
2332         }
2333
2334         INIT_LIST_HEAD(&port->mc_list->list);
2335
2336         ehea_set_portspeed(port, EHEA_SPEED_AUTONEG);
2337
2338         ret = ehea_sense_port_attr(port);
2339         if (ret)
2340                 goto out;
2341
2342         /* Enable Jumbo frames */
2343         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2344         if (!cb4) {
2345                 ehea_error("no mem for cb4");
2346         } else {
2347                 cb4->jumbo_frame = 1;
2348                 hret = ehea_h_modify_ehea_port(adapter->handle,
2349                                                port->logical_port_id,
2350                                                H_PORT_CB4, H_PORT_CB4_JUMBO,
2351                                                cb4);
2352                 if (hret != H_SUCCESS) {
2353                         ehea_info("Jumbo frames not activated");
2354                 }
2355                 kfree(cb4);
2356         }
2357
2358         /* initialize net_device structure */
2359         SET_MODULE_OWNER(dev);
2360
2361         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
2362
2363         dev->open = ehea_open;
2364         dev->poll = ehea_poll;
2365         dev->weight = 64;
2366         dev->stop = ehea_stop;
2367         dev->hard_start_xmit = ehea_start_xmit;
2368         dev->get_stats = ehea_get_stats;
2369         dev->set_multicast_list = ehea_set_multicast_list;
2370         dev->set_mac_address = ehea_set_mac_addr;
2371         dev->change_mtu = ehea_change_mtu;
2372         dev->vlan_rx_register = ehea_vlan_rx_register;
2373         dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid;
2374         dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid;
2375         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
2376                       | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX
2377                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
2378                       | NETIF_F_LLTX;
2379         dev->tx_timeout = &ehea_tx_watchdog;
2380         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
2381
2382         INIT_WORK(&port->reset_task, ehea_reset_port, dev);
2383
2384         ehea_set_ethtool_ops(dev);
2385
2386         ret = register_netdev(dev);
2387         if (ret) {
2388                 ehea_error("register_netdev failed. ret=%d", ret);
2389                 goto out_free;
2390         }
2391
2392         port->netdev = dev;
2393         ret = 0;
2394         goto out;
2395
2396 out_free:
2397         kfree(port->mc_list);
2398 out:
2399         return ret;
2400 }
2401
2402 static int ehea_setup_ports(struct ehea_adapter *adapter)
2403 {
2404         int ret;
2405         int port_setup_ok = 0;
2406         struct ehea_port *port;
2407         struct device_node *dn = NULL;
2408         struct net_device *dev;
2409         int i;
2410
2411         /* get port properties for all ports */
2412         for (i = 0; i < adapter->num_ports; i++) {
2413
2414                 if (adapter->port[i])
2415                         continue;       /* port already up and running */
2416
2417                 /* allocate memory for the port structures */
2418                 dev = alloc_etherdev(sizeof(struct ehea_port));
2419
2420                 if (!dev) {
2421                         ehea_error("no mem for net_device");
2422                         break;
2423                 }
2424
2425                 port = netdev_priv(dev);
2426                 port->adapter = adapter;
2427                 port->netdev = dev;
2428                 adapter->port[i] = port;
2429                 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2430
2431                 dn = of_find_node_by_name(dn, "ethernet");
2432                 ret = ehea_setup_single_port(port, dn);
2433                 if (ret) {
2434                         /* Free mem for this port struct. The others will be
2435                            processed on rollback */
2436                         free_netdev(dev);
2437                         adapter->port[i] = NULL;
2438                         ehea_error("eHEA port %d setup failed, ret=%d", i, ret);
2439                 }
2440         }
2441
2442         of_node_put(dn);
2443
2444         /* Check for succesfully set up ports */
2445         for (i = 0; i < adapter->num_ports; i++)
2446                 if (adapter->port[i])
2447                         port_setup_ok++;
2448
2449         if (port_setup_ok)
2450                 ret = 0;        /* At least some ports are setup correctly */
2451         else
2452                 ret = -EINVAL;
2453
2454         return ret;
2455 }
2456
2457 static int __devinit ehea_probe(struct ibmebus_dev *dev,
2458                                 const struct of_device_id *id)
2459 {
2460         struct ehea_adapter *adapter;
2461         u64 *adapter_handle;
2462         int ret;
2463
2464         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
2465         if (!adapter) {
2466                 ret = -ENOMEM;
2467                 dev_err(&dev->ofdev.dev, "no mem for ehea_adapter\n");
2468                 goto out;
2469         }
2470
2471         adapter_handle = (u64*)get_property(dev->ofdev.node, "ibm,hea-handle",
2472                                             NULL);
2473         if (!adapter_handle) {
2474                 dev_err(&dev->ofdev.dev, "failed getting handle for adapter"
2475                         " '%s'\n", dev->ofdev.node->full_name);
2476                 ret = -ENODEV;
2477                 goto out_free_ad;
2478         }
2479
2480         adapter->handle = *adapter_handle;
2481         adapter->pd = EHEA_PD_ID;
2482
2483         dev->ofdev.dev.driver_data = adapter;
2484
2485         ret = ehea_reg_mr_adapter(adapter);
2486         if (ret) {
2487                 dev_err(&dev->ofdev.dev, "reg_mr_adapter failed\n");
2488                 goto out_free_ad;
2489         }
2490
2491         /* initialize adapter and ports */
2492         /* get adapter properties */
2493         ret = ehea_sense_adapter_attr(adapter);
2494         if (ret) {
2495                 dev_err(&dev->ofdev.dev, "sense_adapter_attr failed: %d", ret);
2496                 goto out_free_res;
2497         }
2498         dev_info(&dev->ofdev.dev, "%d eHEA ports found\n", adapter->num_ports);
2499
2500         adapter->neq = ehea_create_eq(adapter,
2501                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
2502         if (!adapter->neq) {
2503                 dev_err(&dev->ofdev.dev, "NEQ creation failed");
2504                 goto out_free_res;
2505         }
2506
2507         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
2508                      (unsigned long)adapter);
2509
2510         ret = ibmebus_request_irq(NULL, adapter->neq->attr.ist1,
2511                                   ehea_interrupt_neq, SA_INTERRUPT,
2512                                   "ehea_neq", adapter);
2513         if (ret) {
2514                 dev_err(&dev->ofdev.dev, "requesting NEQ IRQ failed");
2515                 goto out_kill_eq;
2516         }
2517
2518         adapter->ehea_wq = create_workqueue("ehea_wq");
2519         if (!adapter->ehea_wq)
2520                 goto out_free_irq;
2521
2522         ret = ehea_setup_ports(adapter);
2523         if (ret) {
2524                 dev_err(&dev->ofdev.dev, "setup_ports failed");
2525                 goto out_kill_wq;
2526         }
2527
2528         ret = 0;
2529         goto out;
2530
2531 out_kill_wq:
2532         destroy_workqueue(adapter->ehea_wq);
2533
2534 out_free_irq:
2535         ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter);
2536
2537 out_kill_eq:
2538         ehea_destroy_eq(adapter->neq);
2539
2540 out_free_res:
2541         ehea_h_free_resource(adapter->handle, adapter->mr.handle);
2542
2543 out_free_ad:
2544         kfree(adapter);
2545 out:
2546         return ret;
2547 }
2548
2549 static void ehea_shutdown_single_port(struct ehea_port *port)
2550 {
2551         unregister_netdev(port->netdev);
2552         kfree(port->mc_list);
2553         free_netdev(port->netdev);
2554 }
2555
2556 static int __devexit ehea_remove(struct ibmebus_dev *dev)
2557 {
2558         struct ehea_adapter *adapter = dev->ofdev.dev.driver_data;
2559         u64 hret;
2560         int i;
2561
2562         for (i = 0; i < adapter->num_ports; i++)
2563                 if (adapter->port[i]) {
2564                         ehea_shutdown_single_port(adapter->port[i]);
2565                         adapter->port[i] = NULL;
2566                 }
2567         destroy_workqueue(adapter->ehea_wq);
2568
2569         ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter);
2570
2571         ehea_destroy_eq(adapter->neq);
2572
2573         hret = ehea_h_free_resource(adapter->handle, adapter->mr.handle);
2574         if (hret) {
2575                 dev_err(&dev->ofdev.dev, "free_resource_mr failed");
2576                 return -EIO;
2577         }
2578         kfree(adapter);
2579         return 0;
2580 }
2581
2582 static int check_module_parm(void)
2583 {
2584         int ret = 0;
2585
2586         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
2587             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
2588                 ehea_info("Bad parameter: rq1_entries");
2589                 ret = -EINVAL;
2590         }
2591         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
2592             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
2593                 ehea_info("Bad parameter: rq2_entries");
2594                 ret = -EINVAL;
2595         }
2596         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
2597             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
2598                 ehea_info("Bad parameter: rq3_entries");
2599                 ret = -EINVAL;
2600         }
2601         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
2602             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
2603                 ehea_info("Bad parameter: sq_entries");
2604                 ret = -EINVAL;
2605         }
2606
2607         return ret;
2608 }
2609
2610 static struct of_device_id ehea_device_table[] = {
2611         {
2612                 .name = "lhea",
2613                 .compatible = "IBM,lhea",
2614         },
2615         {},
2616 };
2617
2618 static struct ibmebus_driver ehea_driver = {
2619         .name = "ehea",
2620         .id_table = ehea_device_table,
2621         .probe = ehea_probe,
2622         .remove = ehea_remove,
2623 };
2624
2625 int __init ehea_module_init(void)
2626 {
2627         int ret;
2628
2629         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
2630                DRV_VERSION);
2631
2632         ret = check_module_parm();
2633         if (ret)
2634                 goto out;
2635         ret = ibmebus_register_driver(&ehea_driver);
2636         if (ret)
2637                 ehea_error("failed registering eHEA device driver on ebus");
2638
2639 out:
2640         return ret;
2641 }
2642
2643 static void __exit ehea_module_exit(void)
2644 {
2645         ibmebus_unregister_driver(&ehea_driver);
2646 }
2647
2648 module_init(ehea_module_init);
2649 module_exit(ehea_module_exit);