drivers/net/ehea/ehea_main.c

   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include <linux/in.h>
  30 #include <linux/ip.h>
  31 #include <linux/tcp.h>
  32 #include <linux/udp.h>
  33 #include <linux/if.h>
  34 #include <linux/list.h>
  35 #include <linux/if_ether.h>
  36 #include <net/ip.h>
  37
  38 #include "ehea.h"
  39 #include "ehea_qmr.h"
  40 #include "ehea_phyp.h"
  41
  42
  43 MODULE_LICENSE("GPL");
  44 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  45 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  46 MODULE_VERSION(DRV_VERSION);
  47
  48
  49 static int msg_level = -1;
  50 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  51 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  52 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  53 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  54
  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
 562         while (eqe) {
 563                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 564                 ehea_error("QP aff_err: entry=0x%lx, token=0x%x",
 565                            eqe->entry, qp_token);
 566                 eqe = ehea_poll_eq(port->qp_eq);
 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         port->autoneg = 1;
 646
 647         /* Number of default QPs */
 648         port->num_def_qps = cb0->num_default_qps;
 649
 650         if (!port->num_def_qps) {
 651                 ret = -EINVAL;
 652                 goto out_free;
 653         }
 654
 655         if (port->num_def_qps >= EHEA_NUM_TX_QP)
 656                 port->num_add_tx_qps = 0;
 657         else
 658                 port->num_add_tx_qps = EHEA_NUM_TX_QP - port->num_def_qps;
 659
 660         ret = 0;
 661 out_free:
 662         if (ret || netif_msg_probe(port))
 663                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
 664         kfree(cb0);
 665 out:
 666         return ret;
 667 }
 668
 669 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
 670 {
 671         struct hcp_ehea_port_cb4 *cb4;
 672         u64 hret;
 673         int ret = 0;
 674
 675         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
 676         if (!cb4) {
 677                 ehea_error("no mem for cb4");
 678                 ret = -ENOMEM;
 679                 goto out;
 680         }
 681
 682         cb4->port_speed = port_speed;
 683
 684         netif_carrier_off(port->netdev);
 685
 686         hret = ehea_h_modify_ehea_port(port->adapter->handle,
 687                                        port->logical_port_id,
 688                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
 689         if (hret == H_SUCCESS) {
 690                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
 691
 692                 hret = ehea_h_query_ehea_port(port->adapter->handle,
 693                                               port->logical_port_id,
 694                                               H_PORT_CB4, H_PORT_CB4_SPEED,
 695                                               cb4);
 696                 if (hret == H_SUCCESS) {
 697                         switch (cb4->port_speed) {
 698                         case H_SPEED_10M_H:
 699                                 port->port_speed = EHEA_SPEED_10M;
 700                                 port->full_duplex = 0;
 701                                 break;
 702                         case H_SPEED_10M_F:
 703                                 port->port_speed = EHEA_SPEED_10M;
 704                                 port->full_duplex = 1;
 705                                 break;
 706                         case H_SPEED_100M_H:
 707                                 port->port_speed = EHEA_SPEED_100M;
 708                                 port->full_duplex = 0;
 709                                 break;
 710                         case H_SPEED_100M_F:
 711                                 port->port_speed = EHEA_SPEED_100M;
 712                                 port->full_duplex = 1;
 713                                 break;
 714                         case H_SPEED_1G_F:
 715                                 port->port_speed = EHEA_SPEED_1G;
 716                                 port->full_duplex = 1;
 717                                 break;
 718                         case H_SPEED_10G_F:
 719                                 port->port_speed = EHEA_SPEED_10G;
 720                                 port->full_duplex = 1;
 721                                 break;
 722                         default:
 723                                 port->port_speed = 0;
 724                                 port->full_duplex = 0;
 725                                 break;
 726                         }
 727                 } else {
 728                         ehea_error("Failed sensing port speed");
 729                         ret = -EIO;
 730                 }
 731         } else {
 732                 if (hret == H_AUTHORITY) {
 733                         ehea_info("Hypervisor denied setting port speed");
 734                         ret = -EPERM;
 735                 } else {
 736                         ret = -EIO;
 737                         ehea_error("Failed setting port speed");
 738                 }
 739         }
 740         netif_carrier_on(port->netdev);
 741         kfree(cb4);
 742 out:
 743         return ret;
 744 }
 745
 746 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
 747 {
 748         int ret;
 749         u8 ec;
 750         u8 portnum;
 751         struct ehea_port *port;
 752
 753         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
 754         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
 755         port = ehea_get_port(adapter, portnum);
 756
 757         switch (ec) {
 758         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
 759
 760                 if (!port) {
 761                         ehea_error("unknown portnum %x", portnum);
 762                         break;
 763                 }
 764
 765                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
 766                         if (!netif_carrier_ok(port->netdev)) {
 767                                 ret = ehea_sense_port_attr(port);
 768                                 if (ret) {
 769                                         ehea_error("failed resensing port "
 770                                                    "attributes");
 771                                         break;
 772                                 }
 773
 774                                 if (netif_msg_link(port))
 775                                         ehea_info("%s: Logical port up: %dMbps "
 776                                                   "%s Duplex",
 777                                                   port->netdev->name,
 778                                                   port->port_speed,
 779                                                   port->full_duplex ==
 780                                                   1 ? "Full" : "Half");
 781
 782                                 netif_carrier_on(port->netdev);
 783                                 netif_wake_queue(port->netdev);
 784                         }
 785                 } else
 786                         if (netif_carrier_ok(port->netdev)) {
 787                                 if (netif_msg_link(port))
 788                                         ehea_info("%s: Logical port down",
 789                                                   port->netdev->name);
 790                                 netif_carrier_off(port->netdev);
 791                                 netif_stop_queue(port->netdev);
 792                         }
 793
 794                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
 795                         if (netif_msg_link(port))
 796                                 ehea_info("%s: Physical port up",
 797                                           port->netdev->name);
 798                 } else {
 799                         if (netif_msg_link(port))
 800                                 ehea_info("%s: Physical port down",
 801                                           port->netdev->name);
 802                 }
 803
 804                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
 805                         ehea_info("External switch port is primary port");
 806                 else
 807                         ehea_info("External switch port is backup port");
 808
 809                 break;
 810         case EHEA_EC_ADAPTER_MALFUNC:
 811                 ehea_error("Adapter malfunction");
 812                 break;
 813         case EHEA_EC_PORT_MALFUNC:
 814                 ehea_info("Port malfunction: Device: %s", port->netdev->name);
 815                 netif_carrier_off(port->netdev);
 816                 netif_stop_queue(port->netdev);
 817                 break;
 818         default:
 819                 ehea_error("unknown event code %x, eqe=0x%lX", ec, eqe);
 820                 break;
 821         }
 822 }
 823
 824 static void ehea_neq_tasklet(unsigned long data)
 825 {
 826         struct ehea_adapter *adapter = (struct ehea_adapter*)data;
 827         struct ehea_eqe *eqe;
 828         u64 event_mask;
 829
 830         eqe = ehea_poll_eq(adapter->neq);
 831         ehea_debug("eqe=%p", eqe);
 832
 833         while (eqe) {
 834                 ehea_debug("*eqe=%lx", eqe->entry);
 835                 ehea_parse_eqe(adapter, eqe->entry);
 836                 eqe = ehea_poll_eq(adapter->neq);
 837                 ehea_debug("next eqe=%p", eqe);
 838         }
 839
 840         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
 841                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
 842                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
 843
 844         ehea_h_reset_events(adapter->handle,
 845                             adapter->neq->fw_handle, event_mask);
 846 }
 847
 848 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
 849 {
 850         struct ehea_adapter *adapter = param;
 851         tasklet_hi_schedule(&adapter->neq_tasklet);
 852         return IRQ_HANDLED;
 853 }
 854
 855
 856 static int ehea_fill_port_res(struct ehea_port_res *pr)
 857 {
 858         int ret;
 859         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
 860
 861         ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
 862                                      - init_attr->act_nr_rwqes_rq2
 863                                      - init_attr->act_nr_rwqes_rq3 - 1);
 864
 865         ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
 866
 867         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
 868
 869         return ret;
 870 }
 871
 872 static int ehea_reg_interrupts(struct net_device *dev)
 873 {
 874         struct ehea_port *port = netdev_priv(dev);
 875         struct ehea_port_res *pr;
 876         int i, ret;
 877
 878         for (i = 0; i < port->num_def_qps; i++) {
 879                 pr = &port->port_res[i];
 880                 snprintf(pr->int_recv_name, EHEA_IRQ_NAME_SIZE - 1
 881                          , "%s-recv%d", dev->name, i);
 882                 ret = ibmebus_request_irq(NULL, pr->recv_eq->attr.ist1,
 883                                           ehea_recv_irq_handler,
 884                                           SA_INTERRUPT, pr->int_recv_name, pr);
 885                 if (ret) {
 886                         ehea_error("failed registering irq for ehea_recv_int:"
 887                                    "port_res_nr:%d, ist=%X", i,
 888                                    pr->recv_eq->attr.ist1);
 889                         goto out_free_seq;
 890                 }
 891                 if (netif_msg_ifup(port))
 892                         ehea_info("irq_handle 0x%X for funct ehea_recv_int %d "
 893                                   "registered", pr->recv_eq->attr.ist1, i);
 894         }
 895
 896         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
 897                  dev->name);
 898
 899         ret = ibmebus_request_irq(NULL, port->qp_eq->attr.ist1,
 900                                   ehea_qp_aff_irq_handler,
 901                                   SA_INTERRUPT, port->int_aff_name, port);
 902         if (ret) {
 903                 ehea_error("failed registering irq for qp_aff_irq_handler:"
 904                            "ist=%X", port->qp_eq->attr.ist1);
 905                 goto out_free_qpeq;
 906         }
 907
 908         if (netif_msg_ifup(port))
 909                 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
 910                           "registered", port->qp_eq->attr.ist1);
 911
 912         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 913                 pr = &port->port_res[i];
 914                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
 915                          "%s-send%d", dev->name, i);
 916                 ret = ibmebus_request_irq(NULL, pr->send_eq->attr.ist1,
 917                                           ehea_send_irq_handler,
 918                                           SA_INTERRUPT, pr->int_send_name,
 919                                           pr);
 920                 if (ret) {
 921                         ehea_error("failed registering irq for ehea_send "
 922                                    "port_res_nr:%d, ist=%X", i,
 923                                    pr->send_eq->attr.ist1);
 924                         goto out_free_req;
 925                 }
 926                 if (netif_msg_ifup(port))
 927                         ehea_info("irq_handle 0x%X for function ehea_send_int "
 928                                   "%d registered", pr->send_eq->attr.ist1, i);
 929         }
 930 out:
 931         return ret;
 932
 933 out_free_req:
 934         while (--i >= 0) {
 935                 u32 ist = port->port_res[i].send_eq->attr.ist1;
 936                 ibmebus_free_irq(NULL, ist, &port->port_res[i]);
 937         }
 938 out_free_qpeq:
 939         ibmebus_free_irq(NULL, port->qp_eq->attr.ist1, port);
 940         i = port->num_def_qps;
 941 out_free_seq:
 942         while (--i >= 0) {
 943                 u32 ist = port->port_res[i].recv_eq->attr.ist1;
 944                 ibmebus_free_irq(NULL, ist, &port->port_res[i]);
 945         }
 946         goto out;
 947 }
 948
 949 static void ehea_free_interrupts(struct net_device *dev)
 950 {
 951         struct ehea_port *port = netdev_priv(dev);
 952         struct ehea_port_res *pr;
 953         int i;
 954
 955         /* send */
 956         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
 957                 pr = &port->port_res[i];
 958                 ibmebus_free_irq(NULL, pr->send_eq->attr.ist1, pr);
 959                 if (netif_msg_intr(port))
 960                         ehea_info("free send irq for res %d with handle 0x%X",
 961                                   i, pr->send_eq->attr.ist1);
 962         }
 963
 964         /* receive */
 965         for (i = 0; i < port->num_def_qps; i++) {
 966                 pr = &port->port_res[i];
 967                 ibmebus_free_irq(NULL, pr->recv_eq->attr.ist1, pr);
 968                 if (netif_msg_intr(port))
 969                         ehea_info("free recv irq for res %d with handle 0x%X",
 970                                   i, pr->recv_eq->attr.ist1);
 971         }
 972
 973         /* associated events */
 974         ibmebus_free_irq(NULL, port->qp_eq->attr.ist1, port);
 975         if (netif_msg_intr(port))
 976                 ehea_info("associated event interrupt for handle 0x%X freed",
 977                           port->qp_eq->attr.ist1);
 978 }
 979
 980 static int ehea_configure_port(struct ehea_port *port)
 981 {
 982         int ret, i;
 983         u64 hret, mask;
 984         struct hcp_ehea_port_cb0 *cb0;
 985
 986         ret = -ENOMEM;
 987         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
 988         if (!cb0)
 989                 goto out;
 990
 991         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
 992                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
 993                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
 994                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
 995                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
 996                                       PXLY_RC_VLAN_FILTER)
 997                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
 998
 999         for (i = 0; i < port->num_def_qps; i++)
1000                 cb0->default_qpn_arr[i] = port->port_res[0].qp->init_attr.qp_nr;
1001
1002         if (netif_msg_ifup(port))
1003                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1004
1005         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1006              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1007
1008         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1009                                        port->logical_port_id,
1010                                        H_PORT_CB0, mask, cb0);
1011         ret = -EIO;
1012         if (hret != H_SUCCESS)
1013                 goto out_free;
1014
1015         ret = 0;
1016
1017 out_free:
1018         kfree(cb0);
1019 out:
1020         return ret;
1021 }
1022
1023 static int ehea_gen_smrs(struct ehea_port_res *pr)
1024 {
1025         u64 hret;
1026         struct ehea_adapter *adapter = pr->port->adapter;
1027
1028         hret = ehea_h_register_smr(adapter->handle, adapter->mr.handle,
1029                                    adapter->mr.vaddr, EHEA_MR_ACC_CTRL,
1030                                    adapter->pd, &pr->send_mr);
1031         if (hret != H_SUCCESS)
1032                 goto out;
1033
1034         hret = ehea_h_register_smr(adapter->handle, adapter->mr.handle,
1035                                    adapter->mr.vaddr, EHEA_MR_ACC_CTRL,
1036                                    adapter->pd, &pr->recv_mr);
1037         if (hret != H_SUCCESS)
1038                 goto out_freeres;
1039
1040         return 0;
1041
1042 out_freeres:
1043         hret = ehea_h_free_resource(adapter->handle, pr->send_mr.handle);
1044         if (hret != H_SUCCESS)
1045                 ehea_error("failed freeing SMR");
1046 out:
1047         return -EIO;
1048 }
1049
1050 static int ehea_rem_smrs(struct ehea_port_res *pr)
1051 {
1052         struct ehea_adapter *adapter = pr->port->adapter;
1053         int ret = 0;
1054         u64 hret;
1055
1056         hret = ehea_h_free_resource(adapter->handle, pr->send_mr.handle);
1057         if (hret != H_SUCCESS) {
1058                 ret = -EIO;
1059                 ehea_error("failed freeing send SMR for pr=%p", pr);
1060         }
1061
1062         hret = ehea_h_free_resource(adapter->handle, pr->recv_mr.handle);
1063         if (hret != H_SUCCESS) {
1064                 ret = -EIO;
1065                 ehea_error("failed freeing recv SMR for pr=%p", pr);
1066         }
1067
1068         return ret;
1069 }
1070
1071 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1072 {
1073         int arr_size = sizeof(void*) * max_q_entries;
1074
1075         q_skba->arr = vmalloc(arr_size);
1076         if (!q_skba->arr)
1077                 return -ENOMEM;
1078
1079         memset(q_skba->arr, 0, arr_size);
1080
1081         q_skba->len = max_q_entries;
1082         q_skba->index = 0;
1083         q_skba->os_skbs = 0;
1084
1085         return 0;
1086 }
1087
1088 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1089                               struct port_res_cfg *pr_cfg, int queue_token)
1090 {
1091         struct ehea_adapter *adapter = port->adapter;
1092         enum ehea_eq_type eq_type = EHEA_EQ;
1093         struct ehea_qp_init_attr *init_attr = NULL;
1094         int ret = -EIO;
1095
1096         memset(pr, 0, sizeof(struct ehea_port_res));
1097
1098         pr->port = port;
1099         spin_lock_init(&pr->send_lock);
1100         spin_lock_init(&pr->recv_lock);
1101         spin_lock_init(&pr->xmit_lock);
1102         spin_lock_init(&pr->netif_queue);
1103
1104         pr->recv_eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1105         if (!pr->recv_eq) {
1106                 ehea_error("create_eq failed (recv_eq)");
1107                 goto out_free;
1108         }
1109
1110         pr->send_eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1111         if (!pr->send_eq) {
1112                 ehea_error("create_eq failed (send_eq)");
1113                 goto out_free;
1114         }
1115
1116         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1117                                      pr->recv_eq->fw_handle,
1118                                      port->logical_port_id);
1119         if (!pr->recv_cq) {
1120                 ehea_error("create_cq failed (cq_recv)");
1121                 goto out_free;
1122         }
1123
1124         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1125                                      pr->send_eq->fw_handle,
1126                                      port->logical_port_id);
1127         if (!pr->send_cq) {
1128                 ehea_error("create_cq failed (cq_send)");
1129                 goto out_free;
1130         }
1131
1132         if (netif_msg_ifup(port))
1133                 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1134                           pr->send_cq->attr.act_nr_of_cqes,
1135                           pr->recv_cq->attr.act_nr_of_cqes);
1136
1137         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1138         if (!init_attr) {
1139                 ret = -ENOMEM;
1140                 ehea_error("no mem for ehea_qp_init_attr");
1141                 goto out_free;
1142         }
1143
1144         init_attr->low_lat_rq1 = 1;
1145         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1146         init_attr->rq_count = 3;
1147         init_attr->qp_token = queue_token;
1148         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1149         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1150         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1151         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1152         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1153         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1154         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1155         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1156         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1157         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1158         init_attr->port_nr = port->logical_port_id;
1159         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1160         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1161         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1162
1163         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1164         if (!pr->qp) {
1165                 ehea_error("create_qp failed");
1166                 ret = -EIO;
1167                 goto out_free;
1168         }
1169
1170         if (netif_msg_ifup(port))
1171                 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1172                           "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1173                           init_attr->act_nr_send_wqes,
1174                           init_attr->act_nr_rwqes_rq1,
1175                           init_attr->act_nr_rwqes_rq2,
1176                           init_attr->act_nr_rwqes_rq3);
1177
1178         ret = ehea_init_q_skba(&pr->sq_skba, init_attr->act_nr_send_wqes + 1);
1179         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1180         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1181         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1182         if (ret)
1183                 goto out_free;
1184
1185         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1186         if (ehea_gen_smrs(pr) != 0) {
1187                 ret = -EIO;
1188                 goto out_free;
1189         }
1190         tasklet_init(&pr->send_comp_task, ehea_send_irq_tasklet,
1191                      (unsigned long)pr);
1192         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1193
1194         kfree(init_attr);
1195         ret = 0;
1196         goto out;
1197
1198 out_free:
1199         kfree(init_attr);
1200         vfree(pr->sq_skba.arr);
1201         vfree(pr->rq1_skba.arr);
1202         vfree(pr->rq2_skba.arr);
1203         vfree(pr->rq3_skba.arr);
1204         ehea_destroy_qp(pr->qp);
1205         ehea_destroy_cq(pr->send_cq);
1206         ehea_destroy_cq(pr->recv_cq);
1207         ehea_destroy_eq(pr->send_eq);
1208         ehea_destroy_eq(pr->recv_eq);
1209 out:
1210         return ret;
1211 }
1212
1213 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1214 {
1215         int ret, i;
1216
1217         ret = ehea_destroy_qp(pr->qp);
1218
1219         if (!ret) {
1220                 ehea_destroy_cq(pr->send_cq);
1221                 ehea_destroy_cq(pr->recv_cq);
1222                 ehea_destroy_eq(pr->send_eq);
1223                 ehea_destroy_eq(pr->recv_eq);
1224
1225                 for (i = 0; i < pr->rq1_skba.len; i++)
1226                         if (pr->rq1_skba.arr[i])
1227                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1228
1229                 for (i = 0; i < pr->rq2_skba.len; i++)
1230                         if (pr->rq2_skba.arr[i])
1231                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1232
1233                 for (i = 0; i < pr->rq3_skba.len; i++)
1234                         if (pr->rq3_skba.arr[i])
1235                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1236
1237                 for (i = 0; i < pr->sq_skba.len; i++)
1238                         if (pr->sq_skba.arr[i])
1239                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1240
1241                 vfree(pr->rq1_skba.arr);
1242                 vfree(pr->rq2_skba.arr);
1243                 vfree(pr->rq3_skba.arr);
1244                 vfree(pr->sq_skba.arr);
1245                 ret = ehea_rem_smrs(pr);
1246         }
1247         return ret;
1248 }
1249
1250 /*
1251  * The write_* functions store information in swqe which is used by
1252  * the hardware to calculate the ip/tcp/udp checksum
1253  */
1254
1255 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1256                                       const struct sk_buff *skb)
1257 {
1258         swqe->ip_start = (u8)(((u64)skb->nh.iph) - ((u64)skb->data));
1259         swqe->ip_end = (u8)(swqe->ip_start + skb->nh.iph->ihl * 4 - 1);
1260 }
1261
1262 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1263                                         const struct sk_buff *skb)
1264 {
1265         swqe->tcp_offset =
1266                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1267
1268         swqe->tcp_end = (u16)skb->len - 1;
1269 }
1270
1271 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1272                                         const struct sk_buff *skb)
1273 {
1274         swqe->tcp_offset =
1275                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1276
1277         swqe->tcp_end = (u16)skb->len - 1;
1278 }
1279
1280
1281 static void write_swqe2_TSO(struct sk_buff *skb,
1282                             struct ehea_swqe *swqe, u32 lkey)
1283 {
1284         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1285         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1286         int skb_data_size = skb->len - skb->data_len;
1287         int headersize;
1288         u64 tmp_addr;
1289
1290         /* Packet is TCP with TSO enabled */
1291         swqe->tx_control |= EHEA_SWQE_TSO;
1292         swqe->mss = skb_shinfo(skb)->gso_size;
1293         /* copy only eth/ip/tcp headers to immediate data and
1294          * the rest of skb->data to sg1entry
1295          */
1296         headersize = ETH_HLEN + (skb->nh.iph->ihl * 4) + (skb->h.th->doff * 4);
1297
1298         skb_data_size = skb->len - skb->data_len;
1299
1300         if (skb_data_size >= headersize) {
1301                 /* copy immediate data */
1302                 memcpy(imm_data, skb->data, headersize);
1303                 swqe->immediate_data_length = headersize;
1304
1305                 if (skb_data_size > headersize) {
1306                         /* set sg1entry data */
1307                         sg1entry->l_key = lkey;
1308                         sg1entry->len = skb_data_size - headersize;
1309
1310                         tmp_addr = (u64)(skb->data + headersize);
1311                         sg1entry->vaddr = tmp_addr;
1312                         swqe->descriptors++;
1313                 }
1314         } else
1315                 ehea_error("cannot handle fragmented headers");
1316 }
1317
1318 static void write_swqe2_nonTSO(struct sk_buff *skb,
1319                                struct ehea_swqe *swqe, u32 lkey)
1320 {
1321         int skb_data_size = skb->len - skb->data_len;
1322         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1323         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1324         u64 tmp_addr;
1325
1326         /* Packet is any nonTSO type
1327          *
1328          * Copy as much as possible skb->data to immediate data and
1329          * the rest to sg1entry
1330          */
1331         if (skb_data_size >= SWQE2_MAX_IMM) {
1332                 /* copy immediate data */
1333                 memcpy(imm_data, skb->data, SWQE2_MAX_IMM);
1334
1335                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1336
1337                 if (skb_data_size > SWQE2_MAX_IMM) {
1338                         /* copy sg1entry data */
1339                         sg1entry->l_key = lkey;
1340                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1341                         tmp_addr = (u64)(skb->data + SWQE2_MAX_IMM);
1342                         sg1entry->vaddr = tmp_addr;
1343                         swqe->descriptors++;
1344                 }
1345         } else {
1346                 memcpy(imm_data, skb->data, skb_data_size);
1347                 swqe->immediate_data_length = skb_data_size;
1348         }
1349 }
1350
1351 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1352                                     struct ehea_swqe *swqe, u32 lkey)
1353 {
1354         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1355         skb_frag_t *frag;
1356         int nfrags, sg1entry_contains_frag_data, i;
1357         u64 tmp_addr;
1358
1359         nfrags = skb_shinfo(skb)->nr_frags;
1360         sg1entry = &swqe->u.immdata_desc.sg_entry;
1361         sg_list = (struct ehea_vsgentry*)&swqe->u.immdata_desc.sg_list;
1362         swqe->descriptors = 0;
1363         sg1entry_contains_frag_data = 0;
1364
1365         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1366                 write_swqe2_TSO(skb, swqe, lkey);
1367         else
1368                 write_swqe2_nonTSO(skb, swqe, lkey);
1369
1370         /* write descriptors */
1371         if (nfrags > 0) {
1372                 if (swqe->descriptors == 0) {
1373                         /* sg1entry not yet used */
1374                         frag = &skb_shinfo(skb)->frags[0];
1375
1376                         /* copy sg1entry data */
1377                         sg1entry->l_key = lkey;
1378                         sg1entry->len = frag->size;
1379                         tmp_addr =  (u64)(page_address(frag->page)
1380                                           + frag->page_offset);
1381                         sg1entry->vaddr = tmp_addr;
1382                         swqe->descriptors++;
1383                         sg1entry_contains_frag_data = 1;
1384                 }
1385
1386                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1387
1388                         frag = &skb_shinfo(skb)->frags[i];
1389                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1390
1391                         sgentry->l_key = lkey;
1392                         sgentry->len = frag->size;
1393
1394                         tmp_addr = (u64)(page_address(frag->page)
1395                                          + frag->page_offset);
1396                         sgentry->vaddr = tmp_addr;
1397                         swqe->descriptors++;
1398                 }
1399         }
1400 }
1401
1402 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1403 {
1404         int ret = 0;
1405         u64 hret;
1406         u8 reg_type;
1407
1408         /* De/Register untagged packets */
1409         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1410         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1411                                      port->logical_port_id,
1412                                      reg_type, port->mac_addr, 0, hcallid);
1413         if (hret != H_SUCCESS) {
1414                 ehea_error("reg_dereg_bcmc failed (tagged)");
1415                 ret = -EIO;
1416                 goto out_herr;
1417         }
1418
1419         /* De/Register VLAN packets */
1420         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1421         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1422                                      port->logical_port_id,
1423                                      reg_type, port->mac_addr, 0, hcallid);
1424         if (hret != H_SUCCESS) {
1425                 ehea_error("reg_dereg_bcmc failed (vlan)");
1426                 ret = -EIO;
1427         }
1428 out_herr:
1429         return ret;
1430 }
1431
1432 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1433 {
1434         struct ehea_port *port = netdev_priv(dev);
1435         struct sockaddr *mac_addr = sa;
1436         struct hcp_ehea_port_cb0 *cb0;
1437         int ret;
1438         u64 hret;
1439
1440         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1441                 ret = -EADDRNOTAVAIL;
1442                 goto out;
1443         }
1444
1445         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1446         if (!cb0) {
1447                 ehea_error("no mem for cb0");
1448                 ret = -ENOMEM;
1449                 goto out;
1450         }
1451
1452         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1453
1454         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1455
1456         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1457                                        port->logical_port_id, H_PORT_CB0,
1458                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1459         if (hret != H_SUCCESS) {
1460                 ret = -EIO;
1461                 goto out_free;
1462         }
1463
1464         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1465
1466         /* Deregister old MAC in pHYP */
1467         ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1468         if (ret)
1469                 goto out_free;
1470
1471         port->mac_addr = cb0->port_mac_addr << 16;
1472
1473         /* Register new MAC in pHYP */
1474         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1475         if (ret)
1476                 goto out_free;
1477
1478         ret = 0;
1479 out_free:
1480         kfree(cb0);
1481 out:
1482         return ret;
1483 }
1484
1485 static void ehea_promiscuous_error(u64 hret, int enable)
1486 {
1487         if (hret == H_AUTHORITY)
1488                 ehea_info("Hypervisor denied %sabling promiscuous mode",
1489                           enable == 1 ? "en" : "dis");
1490         else
1491                 ehea_error("failed %sabling promiscuous mode",
1492                            enable == 1 ? "en" : "dis");
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(struct work_struct *work)
2228 {
2229         int ret;
2230         struct ehea_port *port =
2231                 container_of(work, struct ehea_port, reset_task);
2232         struct net_device *dev = port->netdev;
2233
2234         port->resets++;
2235         down(&port->port_lock);
2236         netif_stop_queue(dev);
2237         netif_poll_disable(dev);
2238
2239         ret = ehea_down(dev);
2240         if (ret)
2241                 ehea_error("ehea_down failed. not all resources are freed");
2242
2243         ret = ehea_up(dev);
2244         if (ret) {
2245                 ehea_error("Reset device %s failed: ret=%d", dev->name, ret);
2246                 goto out;
2247         }
2248
2249         if (netif_msg_timer(port))
2250                 ehea_info("Device %s resetted successfully", dev->name);
2251
2252         netif_poll_enable(dev);
2253         netif_wake_queue(dev);
2254 out:
2255         up(&port->port_lock);
2256         return;
2257 }
2258
2259 static void ehea_tx_watchdog(struct net_device *dev)
2260 {
2261         struct ehea_port *port = netdev_priv(dev);
2262
2263         if (netif_carrier_ok(dev))
2264                 queue_work(port->adapter->ehea_wq, &port->reset_task);
2265 }
2266
2267 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2268 {
2269         struct hcp_query_ehea *cb;
2270         struct device_node *lhea_dn = NULL;
2271         struct device_node *eth_dn = NULL;
2272         u64 hret;
2273         int ret;
2274
2275         cb = kzalloc(PAGE_SIZE, GFP_KERNEL);
2276         if (!cb) {
2277                 ret = -ENOMEM;
2278                 goto out;
2279         }
2280
2281         hret = ehea_h_query_ehea(adapter->handle, cb);
2282
2283         if (hret != H_SUCCESS) {
2284                 ret = -EIO;
2285                 goto out_herr;
2286         }
2287
2288         /* Determine the number of available logical ports
2289          * by counting the child nodes of the lhea OFDT entry
2290          */
2291         adapter->num_ports = 0;
2292         lhea_dn = of_find_node_by_name(lhea_dn, "lhea");
2293         do {
2294                 eth_dn = of_get_next_child(lhea_dn, eth_dn);
2295                 if (eth_dn)
2296                         adapter->num_ports++;
2297         } while ( eth_dn );
2298         of_node_put(lhea_dn);
2299
2300         adapter->max_mc_mac = cb->max_mc_mac - 1;
2301         ret = 0;
2302
2303 out_herr:
2304         kfree(cb);
2305 out:
2306         return ret;
2307 }
2308
2309 static int ehea_setup_single_port(struct ehea_port *port,
2310                                   struct device_node *dn)
2311 {
2312         int ret;
2313         u64 hret;
2314         struct net_device *dev = port->netdev;
2315         struct ehea_adapter *adapter = port->adapter;
2316         struct hcp_ehea_port_cb4 *cb4;
2317         u32 *dn_log_port_id;
2318
2319         sema_init(&port->port_lock, 1);
2320         port->state = EHEA_PORT_DOWN;
2321         port->sig_comp_iv = sq_entries / 10;
2322
2323         if (!dn) {
2324                 ehea_error("bad device node: dn=%p", dn);
2325                 ret = -EINVAL;
2326                 goto out;
2327         }
2328
2329         port->of_dev_node = dn;
2330
2331         /* Determine logical port id */
2332         dn_log_port_id = (u32*)get_property(dn, "ibm,hea-port-no", NULL);
2333
2334         if (!dn_log_port_id) {
2335                 ehea_error("bad device node: dn_log_port_id=%p",
2336                            dn_log_port_id);
2337                 ret = -EINVAL;
2338                 goto out;
2339         }
2340         port->logical_port_id = *dn_log_port_id;
2341
2342         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2343         if (!port->mc_list) {
2344                 ret = -ENOMEM;
2345                 goto out;
2346         }
2347
2348         INIT_LIST_HEAD(&port->mc_list->list);
2349
2350         ret = ehea_sense_port_attr(port);
2351         if (ret)
2352                 goto out;
2353
2354         /* Enable Jumbo frames */
2355         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2356         if (!cb4) {
2357                 ehea_error("no mem for cb4");
2358         } else {
2359                 cb4->jumbo_frame = 1;
2360                 hret = ehea_h_modify_ehea_port(adapter->handle,
2361                                                port->logical_port_id,
2362                                                H_PORT_CB4, H_PORT_CB4_JUMBO,
2363                                                cb4);
2364                 if (hret != H_SUCCESS) {
2365                         ehea_info("Jumbo frames not activated");
2366                 }
2367                 kfree(cb4);
2368         }
2369
2370         /* initialize net_device structure */
2371         SET_MODULE_OWNER(dev);
2372
2373         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
2374
2375         dev->open = ehea_open;
2376         dev->poll = ehea_poll;
2377         dev->weight = 64;
2378         dev->stop = ehea_stop;
2379         dev->hard_start_xmit = ehea_start_xmit;
2380         dev->get_stats = ehea_get_stats;
2381         dev->set_multicast_list = ehea_set_multicast_list;
2382         dev->set_mac_address = ehea_set_mac_addr;
2383         dev->change_mtu = ehea_change_mtu;
2384         dev->vlan_rx_register = ehea_vlan_rx_register;
2385         dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid;
2386         dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid;
2387         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
2388                       | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX
2389                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
2390                       | NETIF_F_LLTX;
2391         dev->tx_timeout = &ehea_tx_watchdog;
2392         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
2393
2394         INIT_WORK(&port->reset_task, ehea_reset_port);
2395
2396         ehea_set_ethtool_ops(dev);
2397
2398         ret = register_netdev(dev);
2399         if (ret) {
2400                 ehea_error("register_netdev failed. ret=%d", ret);
2401                 goto out_free;
2402         }
2403
2404         port->netdev = dev;
2405         ret = 0;
2406         goto out;
2407
2408 out_free:
2409         kfree(port->mc_list);
2410 out:
2411         return ret;
2412 }
2413
2414 static int ehea_setup_ports(struct ehea_adapter *adapter)
2415 {
2416         int ret;
2417         int port_setup_ok = 0;
2418         struct ehea_port *port;
2419         struct device_node *dn = NULL;
2420         struct net_device *dev;
2421         int i;
2422
2423         /* get port properties for all ports */
2424         for (i = 0; i < adapter->num_ports; i++) {
2425
2426                 if (adapter->port[i])
2427                         continue;       /* port already up and running */
2428
2429                 /* allocate memory for the port structures */
2430                 dev = alloc_etherdev(sizeof(struct ehea_port));
2431
2432                 if (!dev) {
2433                         ehea_error("no mem for net_device");
2434                         break;
2435                 }
2436
2437                 port = netdev_priv(dev);
2438                 port->adapter = adapter;
2439                 port->netdev = dev;
2440                 adapter->port[i] = port;
2441                 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2442
2443                 dn = of_find_node_by_name(dn, "ethernet");
2444                 ret = ehea_setup_single_port(port, dn);
2445                 if (ret) {
2446                         /* Free mem for this port struct. The others will be
2447                            processed on rollback */
2448                         free_netdev(dev);
2449                         adapter->port[i] = NULL;
2450                         ehea_error("eHEA port %d setup failed, ret=%d", i, ret);
2451                 }
2452         }
2453
2454         of_node_put(dn);
2455
2456         /* Check for succesfully set up ports */
2457         for (i = 0; i < adapter->num_ports; i++)
2458                 if (adapter->port[i])
2459                         port_setup_ok++;
2460
2461         if (port_setup_ok)
2462                 ret = 0;        /* At least some ports are setup correctly */
2463         else
2464                 ret = -EINVAL;
2465
2466         return ret;
2467 }
2468
2469 static int __devinit ehea_probe(struct ibmebus_dev *dev,
2470                                 const struct of_device_id *id)
2471 {
2472         struct ehea_adapter *adapter;
2473         u64 *adapter_handle;
2474         int ret;
2475
2476         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
2477         if (!adapter) {
2478                 ret = -ENOMEM;
2479                 dev_err(&dev->ofdev.dev, "no mem for ehea_adapter\n");
2480                 goto out;
2481         }
2482
2483         adapter_handle = (u64*)get_property(dev->ofdev.node, "ibm,hea-handle",
2484                                             NULL);
2485         if (adapter_handle)
2486                 adapter->handle = *adapter_handle;
2487
2488         if (!adapter->handle) {
2489                 dev_err(&dev->ofdev.dev, "failed getting handle for adapter"
2490                         " '%s'\n", dev->ofdev.node->full_name);
2491                 ret = -ENODEV;
2492                 goto out_free_ad;
2493         }
2494
2495         adapter->pd = EHEA_PD_ID;
2496
2497         dev->ofdev.dev.driver_data = adapter;
2498
2499         ret = ehea_reg_mr_adapter(adapter);
2500         if (ret) {
2501                 dev_err(&dev->ofdev.dev, "reg_mr_adapter failed\n");
2502                 goto out_free_ad;
2503         }
2504
2505         /* initialize adapter and ports */
2506         /* get adapter properties */
2507         ret = ehea_sense_adapter_attr(adapter);
2508         if (ret) {
2509                 dev_err(&dev->ofdev.dev, "sense_adapter_attr failed: %d", ret);
2510                 goto out_free_res;
2511         }
2512         dev_info(&dev->ofdev.dev, "%d eHEA ports found\n", adapter->num_ports);
2513
2514         adapter->neq = ehea_create_eq(adapter,
2515                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
2516         if (!adapter->neq) {
2517                 dev_err(&dev->ofdev.dev, "NEQ creation failed");
2518                 goto out_free_res;
2519         }
2520
2521         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
2522                      (unsigned long)adapter);
2523
2524         ret = ibmebus_request_irq(NULL, adapter->neq->attr.ist1,
2525                                   ehea_interrupt_neq, SA_INTERRUPT,
2526                                   "ehea_neq", adapter);
2527         if (ret) {
2528                 dev_err(&dev->ofdev.dev, "requesting NEQ IRQ failed");
2529                 goto out_kill_eq;
2530         }
2531
2532         adapter->ehea_wq = create_workqueue("ehea_wq");
2533         if (!adapter->ehea_wq)
2534                 goto out_free_irq;
2535
2536         ret = ehea_setup_ports(adapter);
2537         if (ret) {
2538                 dev_err(&dev->ofdev.dev, "setup_ports failed");
2539                 goto out_kill_wq;
2540         }
2541
2542         ret = 0;
2543         goto out;
2544
2545 out_kill_wq:
2546         destroy_workqueue(adapter->ehea_wq);
2547
2548 out_free_irq:
2549         ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter);
2550
2551 out_kill_eq:
2552         ehea_destroy_eq(adapter->neq);
2553
2554 out_free_res:
2555         ehea_h_free_resource(adapter->handle, adapter->mr.handle);
2556
2557 out_free_ad:
2558         kfree(adapter);
2559 out:
2560         return ret;
2561 }
2562
2563 static void ehea_shutdown_single_port(struct ehea_port *port)
2564 {
2565         unregister_netdev(port->netdev);
2566         kfree(port->mc_list);
2567         free_netdev(port->netdev);
2568 }
2569
2570 static int __devexit ehea_remove(struct ibmebus_dev *dev)
2571 {
2572         struct ehea_adapter *adapter = dev->ofdev.dev.driver_data;
2573         u64 hret;
2574         int i;
2575
2576         for (i = 0; i < adapter->num_ports; i++)
2577                 if (adapter->port[i]) {
2578                         ehea_shutdown_single_port(adapter->port[i]);
2579                         adapter->port[i] = NULL;
2580                 }
2581         destroy_workqueue(adapter->ehea_wq);
2582
2583         ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter);
2584
2585         ehea_destroy_eq(adapter->neq);
2586
2587         hret = ehea_h_free_resource(adapter->handle, adapter->mr.handle);
2588         if (hret) {
2589                 dev_err(&dev->ofdev.dev, "free_resource_mr failed");
2590                 return -EIO;
2591         }
2592         kfree(adapter);
2593         return 0;
2594 }
2595
2596 static int check_module_parm(void)
2597 {
2598         int ret = 0;
2599
2600         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
2601             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
2602                 ehea_info("Bad parameter: rq1_entries");
2603                 ret = -EINVAL;
2604         }
2605         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
2606             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
2607                 ehea_info("Bad parameter: rq2_entries");
2608                 ret = -EINVAL;
2609         }
2610         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
2611             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
2612                 ehea_info("Bad parameter: rq3_entries");
2613                 ret = -EINVAL;
2614         }
2615         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
2616             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
2617                 ehea_info("Bad parameter: sq_entries");
2618                 ret = -EINVAL;
2619         }
2620
2621         return ret;
2622 }
2623
2624 static struct of_device_id ehea_device_table[] = {
2625         {
2626                 .name = "lhea",
2627                 .compatible = "IBM,lhea",
2628         },
2629         {},
2630 };
2631
2632 static struct ibmebus_driver ehea_driver = {
2633         .name = "ehea",
2634         .id_table = ehea_device_table,
2635         .probe = ehea_probe,
2636         .remove = ehea_remove,
2637 };
2638
2639 int __init ehea_module_init(void)
2640 {
2641         int ret;
2642
2643         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
2644                DRV_VERSION);
2645
2646         ret = check_module_parm();
2647         if (ret)
2648                 goto out;
2649         ret = ibmebus_register_driver(&ehea_driver);
2650         if (ret)
2651                 ehea_error("failed registering eHEA device driver on ebus");
2652
2653 out:
2654         return ret;
2655 }
2656
2657 static void __exit ehea_module_exit(void)
2658 {
2659         ibmebus_unregister_driver(&ehea_driver);
2660 }
2661
2662 module_init(ehea_module_init);
2663 module_exit(ehea_module_exit);