drivers/net/ehea/ehea_main.c

   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include <linux/in.h>
  30 #include <linux/ip.h>
  31 #include <linux/tcp.h>
  32 #include <linux/udp.h>
  33 #include <linux/if.h>
  34 #include <linux/list.h>
  35 #include <linux/if_ether.h>
  36 #include <net/ip.h>
  37
  38 #include "ehea.h"
  39 #include "ehea_qmr.h"
  40 #include "ehea_phyp.h"
  41
  42
  43 MODULE_LICENSE("GPL");
  44 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  45 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  46 MODULE_VERSION(DRV_VERSION);
  47
  48
  49 static int msg_level = -1;
  50 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  51 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  52 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  53 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  54 static int use_mcs = 0;
  55 static int use_lro = 0;
  56 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  57 static int num_tx_qps = EHEA_NUM_TX_QP;
  58 static int prop_carrier_state = 0;
  59
  60 module_param(msg_level, int, 0);
  61 module_param(rq1_entries, int, 0);
  62 module_param(rq2_entries, int, 0);
  63 module_param(rq3_entries, int, 0);
  64 module_param(sq_entries, int, 0);
  65 module_param(prop_carrier_state, int, 0);
  66 module_param(use_mcs, int, 0);
  67 module_param(use_lro, int, 0);
  68 module_param(lro_max_aggr, int, 0);
  69 module_param(num_tx_qps, int, 0);
  70
  71 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
  72 MODULE_PARM_DESC(msg_level, "msg_level");
  73 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  74                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  75 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  76                  "[2^x - 1], x = [6..14]. Default = "
  77                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  78 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  79                  "[2^x - 1], x = [6..14]. Default = "
  80                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  81 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  82                  "[2^x - 1], x = [6..14]. Default = "
  83                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  84 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  85                  "[2^x - 1], x = [6..14]. Default = "
  86                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  87 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
  88
  89 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
  90                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
  91 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
  92                  "Default = 0");
  93
  94 static int port_name_cnt = 0;
  95 static LIST_HEAD(adapter_list);
  96 u64 ehea_driver_flags = 0;
  97 struct workqueue_struct *ehea_driver_wq;
  98 struct work_struct ehea_rereg_mr_task;
  99
 100
 101 static int __devinit ehea_probe_adapter(struct ibmebus_dev *dev,
 102                                         const struct of_device_id *id);
 103
 104 static int __devexit ehea_remove(struct ibmebus_dev *dev);
 105
 106 static struct of_device_id ehea_device_table[] = {
 107         {
 108                 .name = "lhea",
 109                 .compatible = "IBM,lhea",
 110         },
 111         {},
 112 };
 113
 114 static struct ibmebus_driver ehea_driver = {
 115         .name = "ehea",
 116         .id_table = ehea_device_table,
 117         .probe = ehea_probe_adapter,
 118         .remove = ehea_remove,
 119 };
 120
 121 void ehea_dump(void *adr, int len, char *msg) {
 122         int x;
 123         unsigned char *deb = adr;
 124         for (x = 0; x < len; x += 16) {
 125                 printk(DRV_NAME " %s adr=%p ofs=%04x %016lx %016lx\n", msg,
 126                           deb, x, *((u64*)&deb[0]), *((u64*)&deb[8]));
 127                 deb += 16;
 128         }
 129 }
 130
 131 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 132 {
 133         struct ehea_port *port = netdev_priv(dev);
 134         struct net_device_stats *stats = &port->stats;
 135         struct hcp_ehea_port_cb2 *cb2;
 136         u64 hret, rx_packets;
 137         int i;
 138
 139         memset(stats, 0, sizeof(*stats));
 140
 141         cb2 = kzalloc(PAGE_SIZE, GFP_KERNEL);
 142         if (!cb2) {
 143                 ehea_error("no mem for cb2");
 144                 goto out;
 145         }
 146
 147         hret = ehea_h_query_ehea_port(port->adapter->handle,
 148                                       port->logical_port_id,
 149                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 150         if (hret != H_SUCCESS) {
 151                 ehea_error("query_ehea_port failed");
 152                 goto out_herr;
 153         }
 154
 155         if (netif_msg_hw(port))
 156                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 157
 158         rx_packets = 0;
 159         for (i = 0; i < port->num_def_qps; i++)
 160                 rx_packets += port->port_res[i].rx_packets;
 161
 162         stats->tx_packets = cb2->txucp + cb2->txmcp + cb2->txbcp;
 163         stats->multicast = cb2->rxmcp;
 164         stats->rx_errors = cb2->rxuerr;
 165         stats->rx_bytes = cb2->rxo;
 166         stats->tx_bytes = cb2->txo;
 167         stats->rx_packets = rx_packets;
 168
 169 out_herr:
 170         kfree(cb2);
 171 out:
 172         return stats;
 173 }
 174
 175 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 176 {
 177         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 178         struct net_device *dev = pr->port->netdev;
 179         int max_index_mask = pr->rq1_skba.len - 1;
 180         int i;
 181
 182         if (!nr_of_wqes)
 183                 return;
 184
 185         for (i = 0; i < nr_of_wqes; i++) {
 186                 if (!skb_arr_rq1[index]) {
 187                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 188                                                               EHEA_L_PKT_SIZE);
 189                         if (!skb_arr_rq1[index]) {
 190                                 ehea_error("%s: no mem for skb/%d wqes filled",
 191                                            dev->name, i);
 192                                 break;
 193                         }
 194                 }
 195                 index--;
 196                 index &= max_index_mask;
 197         }
 198         /* Ring doorbell */
 199         ehea_update_rq1a(pr->qp, i);
 200 }
 201
 202 static int ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 203 {
 204         int ret = 0;
 205         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 206         struct net_device *dev = pr->port->netdev;
 207         int i;
 208
 209         for (i = 0; i < pr->rq1_skba.len; i++) {
 210                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 211                 if (!skb_arr_rq1[i]) {
 212                         ehea_error("%s: no mem for skb/%d wqes filled",
 213                                    dev->name, i);
 214                         ret = -ENOMEM;
 215                         goto out;
 216                 }
 217         }
 218         /* Ring doorbell */
 219         ehea_update_rq1a(pr->qp, nr_rq1a);
 220 out:
 221         return ret;
 222 }
 223
 224 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 225                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 226                               int num_wqes, int wqe_type, int packet_size)
 227 {
 228         struct net_device *dev = pr->port->netdev;
 229         struct ehea_qp *qp = pr->qp;
 230         struct sk_buff **skb_arr = q_skba->arr;
 231         struct ehea_rwqe *rwqe;
 232         int i, index, max_index_mask, fill_wqes;
 233         int ret = 0;
 234
 235         fill_wqes = q_skba->os_skbs + num_wqes;
 236
 237         if (!fill_wqes)
 238                 return ret;
 239
 240         index = q_skba->index;
 241         max_index_mask = q_skba->len - 1;
 242         for (i = 0; i < fill_wqes; i++) {
 243                 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
 244                 if (!skb) {
 245                         ehea_error("%s: no mem for skb/%d wqes filled",
 246                                    pr->port->netdev->name, i);
 247                         q_skba->os_skbs = fill_wqes - i;
 248                         ret = -ENOMEM;
 249                         break;
 250                 }
 251                 skb_reserve(skb, NET_IP_ALIGN);
 252
 253                 skb_arr[index] = skb;
 254
 255                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 256                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 257                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 258                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 259                 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
 260                 rwqe->sg_list[0].len = packet_size;
 261                 rwqe->data_segments = 1;
 262
 263                 index++;
 264                 index &= max_index_mask;
 265
 266                 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)))
 267                         goto out;
 268         }
 269
 270         q_skba->index = index;
 271
 272         /* Ring doorbell */
 273         iosync();
 274         if (rq_nr == 2)
 275                 ehea_update_rq2a(pr->qp, i);
 276         else
 277                 ehea_update_rq3a(pr->qp, i);
 278 out:
 279         return ret;
 280 }
 281
 282
 283 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 284 {
 285         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 286                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 287                                   EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
 288 }
 289
 290
 291 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 292 {
 293         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 294                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 295                                   EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
 296 }
 297
 298 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 299 {
 300         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 301         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 302                 return 0;
 303         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 304             (cqe->header_length == 0))
 305                 return 0;
 306         return -EINVAL;
 307 }
 308
 309 static inline void ehea_fill_skb(struct net_device *dev,
 310                                  struct sk_buff *skb, struct ehea_cqe *cqe)
 311 {
 312         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 313
 314         skb_put(skb, length);
 315         skb->ip_summed = CHECKSUM_UNNECESSARY;
 316         skb->protocol = eth_type_trans(skb, dev);
 317 }
 318
 319 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 320                                                int arr_len,
 321                                                struct ehea_cqe *cqe)
 322 {
 323         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 324         struct sk_buff *skb;
 325         void *pref;
 326         int x;
 327
 328         x = skb_index + 1;
 329         x &= (arr_len - 1);
 330
 331         pref = skb_array[x];
 332         prefetchw(pref);
 333         prefetchw(pref + EHEA_CACHE_LINE);
 334
 335         pref = (skb_array[x]->data);
 336         prefetch(pref);
 337         prefetch(pref + EHEA_CACHE_LINE);
 338         prefetch(pref + EHEA_CACHE_LINE * 2);
 339         prefetch(pref + EHEA_CACHE_LINE * 3);
 340         skb = skb_array[skb_index];
 341         skb_array[skb_index] = NULL;
 342         return skb;
 343 }
 344
 345 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 346                                                   int arr_len, int wqe_index)
 347 {
 348         struct sk_buff *skb;
 349         void *pref;
 350         int x;
 351
 352         x = wqe_index + 1;
 353         x &= (arr_len - 1);
 354
 355         pref = skb_array[x];
 356         prefetchw(pref);
 357         prefetchw(pref + EHEA_CACHE_LINE);
 358
 359         pref = (skb_array[x]->data);
 360         prefetchw(pref);
 361         prefetchw(pref + EHEA_CACHE_LINE);
 362
 363         skb = skb_array[wqe_index];
 364         skb_array[wqe_index] = NULL;
 365         return skb;
 366 }
 367
 368 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 369                                  struct ehea_cqe *cqe, int *processed_rq2,
 370                                  int *processed_rq3)
 371 {
 372         struct sk_buff *skb;
 373
 374         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 375                 pr->p_stats.err_tcp_cksum++;
 376         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 377                 pr->p_stats.err_ip_cksum++;
 378         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 379                 pr->p_stats.err_frame_crc++;
 380
 381         if (netif_msg_rx_err(pr->port)) {
 382                 ehea_error("CQE Error for QP %d", pr->qp->init_attr.qp_nr);
 383                 ehea_dump(cqe, sizeof(*cqe), "CQE");
 384         }
 385
 386         if (rq == 2) {
 387                 *processed_rq2 += 1;
 388                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 389                 dev_kfree_skb(skb);
 390         } else if (rq == 3) {
 391                 *processed_rq3 += 1;
 392                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 393                 dev_kfree_skb(skb);
 394         }
 395
 396         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 397                 ehea_error("Critical receive error. Resetting port.");
 398                 queue_work(pr->port->adapter->ehea_wq, &pr->port->reset_task);
 399                 return 1;
 400         }
 401
 402         return 0;
 403 }
 404
 405 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 406                        void **tcph, u64 *hdr_flags, void *priv)
 407 {
 408         struct ehea_cqe *cqe = priv;
 409         unsigned int ip_len;
 410         struct iphdr *iph;
 411
 412         /* non tcp/udp packets */
 413         if (!cqe->header_length)
 414                 return -1;
 415
 416         /* non tcp packet */
 417         skb_reset_network_header(skb);
 418         iph = ip_hdr(skb);
 419         if (iph->protocol != IPPROTO_TCP)
 420                 return -1;
 421
 422         ip_len = ip_hdrlen(skb);
 423         skb_set_transport_header(skb, ip_len);
 424         *tcph = tcp_hdr(skb);
 425
 426         /* check if ip header and tcp header are complete */
 427         if (iph->tot_len < ip_len + tcp_hdrlen(skb))
 428                 return -1;
 429
 430         *hdr_flags = LRO_IPV4 | LRO_TCP;
 431         *iphdr = iph;
 432
 433         return 0;
 434 }
 435
 436 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 437                           struct sk_buff *skb)
 438 {
 439         int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 440                 && pr->port->vgrp;
 441
 442         if (use_lro) {
 443                 if (vlan_extracted)
 444                         lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
 445                                                      pr->port->vgrp,
 446                                                      cqe->vlan_tag,
 447                                                      cqe);
 448                 else
 449                         lro_receive_skb(&pr->lro_mgr, skb, cqe);
 450         } else {
 451                 if (vlan_extracted)
 452                         vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
 453                                                  cqe->vlan_tag);
 454                 else
 455                         netif_receive_skb(skb);
 456         }
 457 }
 458
 459 static int ehea_proc_rwqes(struct net_device *dev,
 460                            struct ehea_port_res *pr,
 461                            int budget)
 462 {
 463         struct ehea_port *port = pr->port;
 464         struct ehea_qp *qp = pr->qp;
 465         struct ehea_cqe *cqe;
 466         struct sk_buff *skb;
 467         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 468         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 469         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 470         int skb_arr_rq1_len = pr->rq1_skba.len;
 471         int skb_arr_rq2_len = pr->rq2_skba.len;
 472         int skb_arr_rq3_len = pr->rq3_skba.len;
 473         int processed, processed_rq1, processed_rq2, processed_rq3;
 474         int wqe_index, last_wqe_index, rq, port_reset;
 475
 476         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 477         last_wqe_index = 0;
 478
 479         cqe = ehea_poll_rq1(qp, &wqe_index);
 480         while ((processed < budget) && cqe) {
 481                 ehea_inc_rq1(qp);
 482                 processed_rq1++;
 483                 processed++;
 484                 if (netif_msg_rx_status(port))
 485                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 486
 487                 last_wqe_index = wqe_index;
 488                 rmb();
 489                 if (!ehea_check_cqe(cqe, &rq)) {
 490                         if (rq == 1) {  /* LL RQ1 */
 491                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 492                                                           skb_arr_rq1_len,
 493                                                           wqe_index);
 494                                 if (unlikely(!skb)) {
 495                                         if (netif_msg_rx_err(port))
 496                                                 ehea_error("LL rq1: skb=NULL");
 497
 498                                         skb = netdev_alloc_skb(dev,
 499                                                                EHEA_L_PKT_SIZE);
 500                                         if (!skb)
 501                                                 break;
 502                                 }
 503                                 skb_copy_to_linear_data(skb, ((char*)cqe) + 64,
 504                                                  cqe->num_bytes_transfered - 4);
 505                                 ehea_fill_skb(dev, skb, cqe);
 506                         } else if (rq == 2) {  /* RQ2 */
 507                                 skb = get_skb_by_index(skb_arr_rq2,
 508                                                        skb_arr_rq2_len, cqe);
 509                                 if (unlikely(!skb)) {
 510                                         if (netif_msg_rx_err(port))
 511                                                 ehea_error("rq2: skb=NULL");
 512                                         break;
 513                                 }
 514                                 ehea_fill_skb(dev, skb, cqe);
 515                                 processed_rq2++;
 516                         } else {  /* RQ3 */
 517                                 skb = get_skb_by_index(skb_arr_rq3,
 518                                                        skb_arr_rq3_len, cqe);
 519                                 if (unlikely(!skb)) {
 520                                         if (netif_msg_rx_err(port))
 521                                                 ehea_error("rq3: skb=NULL");
 522                                         break;
 523                                 }
 524                                 ehea_fill_skb(dev, skb, cqe);
 525                                 processed_rq3++;
 526                         }
 527
 528                         ehea_proc_skb(pr, cqe, skb);
 529                         dev->last_rx = jiffies;
 530                 } else {
 531                         pr->p_stats.poll_receive_errors++;
 532                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 533                                                            &processed_rq2,
 534                                                            &processed_rq3);
 535                         if (port_reset)
 536                                 break;
 537                 }
 538                 cqe = ehea_poll_rq1(qp, &wqe_index);
 539         }
 540         if (use_lro)
 541                 lro_flush_all(&pr->lro_mgr);
 542
 543         pr->rx_packets += processed;
 544
 545         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 546         ehea_refill_rq2(pr, processed_rq2);
 547         ehea_refill_rq3(pr, processed_rq3);
 548
 549         return processed;
 550 }
 551
 552 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 553 {
 554         struct sk_buff *skb;
 555         struct ehea_cq *send_cq = pr->send_cq;
 556         struct ehea_cqe *cqe;
 557         int quota = my_quota;
 558         int cqe_counter = 0;
 559         int swqe_av = 0;
 560         int index;
 561         unsigned long flags;
 562
 563         cqe = ehea_poll_cq(send_cq);
 564         while(cqe && (quota > 0)) {
 565                 ehea_inc_cq(send_cq);
 566
 567                 cqe_counter++;
 568                 rmb();
 569                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 570                         ehea_error("Send Completion Error: Resetting port");
 571                         if (netif_msg_tx_err(pr->port))
 572                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 573                         queue_work(pr->port->adapter->ehea_wq,
 574                                    &pr->port->reset_task);
 575                         break;
 576                 }
 577
 578                 if (netif_msg_tx_done(pr->port))
 579                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 580
 581                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 582                            == EHEA_SWQE2_TYPE)) {
 583
 584                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 585                         skb = pr->sq_skba.arr[index];
 586                         dev_kfree_skb(skb);
 587                         pr->sq_skba.arr[index] = NULL;
 588                 }
 589
 590                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 591                 quota--;
 592
 593                 cqe = ehea_poll_cq(send_cq);
 594         };
 595
 596         ehea_update_feca(send_cq, cqe_counter);
 597         atomic_add(swqe_av, &pr->swqe_avail);
 598
 599         spin_lock_irqsave(&pr->netif_queue, flags);
 600
 601         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 602                                   >= pr->swqe_refill_th)) {
 603                 netif_wake_queue(pr->port->netdev);
 604                 pr->queue_stopped = 0;
 605         }
 606         spin_unlock_irqrestore(&pr->netif_queue, flags);
 607
 608         return cqe;
 609 }
 610
 611 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 612 #define EHEA_POLL_MAX_CQES 65535
 613
 614 static int ehea_poll(struct napi_struct *napi, int budget)
 615 {
 616         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, napi);
 617         struct net_device *dev = pr->port->netdev;
 618         struct ehea_cqe *cqe;
 619         struct ehea_cqe *cqe_skb = NULL;
 620         int force_irq, wqe_index;
 621         int rx = 0;
 622
 623         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 624         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 625
 626         if (!force_irq)
 627                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 628
 629         while ((rx != budget) || force_irq) {
 630                 pr->poll_counter = 0;
 631                 force_irq = 0;
 632                 netif_rx_complete(dev, napi);
 633                 ehea_reset_cq_ep(pr->recv_cq);
 634                 ehea_reset_cq_ep(pr->send_cq);
 635                 ehea_reset_cq_n1(pr->recv_cq);
 636                 ehea_reset_cq_n1(pr->send_cq);
 637                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 638                 cqe_skb = ehea_poll_cq(pr->send_cq);
 639
 640                 if (!cqe && !cqe_skb)
 641                         return rx;
 642
 643                 if (!netif_rx_reschedule(dev, napi))
 644                         return rx;
 645
 646                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 647                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 648         }
 649
 650         pr->poll_counter++;
 651         return rx;
 652 }
 653
 654 #ifdef CONFIG_NET_POLL_CONTROLLER
 655 static void ehea_netpoll(struct net_device *dev)
 656 {
 657         struct ehea_port *port = netdev_priv(dev);
 658         int i;
 659
 660         for (i = 0; i < port->num_def_qps; i++)
 661                 netif_rx_schedule(dev, &port->port_res[i].napi);
 662 }
 663 #endif
 664
 665 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 666 {
 667         struct ehea_port_res *pr = param;
 668
 669         netif_rx_schedule(pr->port->netdev, &pr->napi);
 670
 671         return IRQ_HANDLED;
 672 }
 673
 674 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 675 {
 676         struct ehea_port *port = param;
 677         struct ehea_eqe *eqe;
 678         struct ehea_qp *qp;
 679         u32 qp_token;
 680
 681         eqe = ehea_poll_eq(port->qp_eq);
 682
 683         while (eqe) {
 684                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 685                 ehea_error("QP aff_err: entry=0x%lx, token=0x%x",
 686                            eqe->entry, qp_token);
 687
 688                 qp = port->port_res[qp_token].qp;
 689                 ehea_error_data(port->adapter, qp->fw_handle);
 690                 eqe = ehea_poll_eq(port->qp_eq);
 691         }
 692
 693         queue_work(port->adapter->ehea_wq, &port->reset_task);
 694
 695         return IRQ_HANDLED;
 696 }
 697
 698 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 699                                        int logical_port)
 700 {
 701         int i;
 702
 703         for (i = 0; i < EHEA_MAX_PORTS; i++)
 704                 if (adapter->port[i])
 705                         if (adapter->port[i]->logical_port_id == logical_port)
 706                                 return adapter->port[i];
 707         return NULL;
 708 }
 709
 710 int ehea_sense_port_attr(struct ehea_port *port)
 711 {
 712         int ret;
 713         u64 hret;
 714         struct hcp_ehea_port_cb0 *cb0;
 715
 716         cb0 = kzalloc(PAGE_SIZE, GFP_ATOMIC);   /* May be called via */
 717         if (!cb0) {                             /* ehea_neq_tasklet() */
 718                 ehea_error("no mem for cb0");
 719                 ret = -ENOMEM;
 720                 goto out;
 721         }
 722
 723         hret = ehea_h_query_ehea_port(port->adapter->handle,
 724                                       port->logical_port_id, H_PORT_CB0,
 725                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 726                                       cb0);
 727         if (hret != H_SUCCESS) {
 728                 ret = -EIO;
 729                 goto out_free;
 730         }
 731
 732         /* MAC address */
 733         port->mac_addr = cb0->port_mac_addr << 16;
 734
 735         if (!is_valid_ether_addr((u8*)&port->mac_addr)) {
 736                 ret = -EADDRNOTAVAIL;
 737                 goto out_free;
 738         }
 739
 740         /* Port speed */
 741         switch (cb0->port_speed) {
 742         case H_SPEED_10M_H:
 743                 port->port_speed = EHEA_SPEED_10M;
 744                 port->full_duplex = 0;
 745                 break;
 746         case H_SPEED_10M_F:
 747                 port->port_speed = EHEA_SPEED_10M;
 748                 port->full_duplex = 1;
 749                 break;
 750         case H_SPEED_100M_H:
 751                 port->port_speed = EHEA_SPEED_100M;
 752                 port->full_duplex = 0;
 753                 break;
 754         case H_SPEED_100M_F:
 755                 port->port_speed = EHEA_SPEED_100M;
 756                 port->full_duplex = 1;
 757                 break;
 758         case H_SPEED_1G_F:
 759                 port->port_speed = EHEA_SPEED_1G;
 760                 port->full_duplex = 1;
 761                 break;
 762         case H_SPEED_10G_F:
 763                 port->port_speed = EHEA_SPEED_10G;
 764                 port->full_duplex = 1;
 765                 break;
 766         default:
 767                 port->port_speed = 0;
 768                 port->full_duplex = 0;
 769                 break;
 770         }
 771
 772         port->autoneg = 1;
 773         port->num_mcs = cb0->num_default_qps;
 774
 775         /* Number of default QPs */
 776         if (use_mcs)
 777                 port->num_def_qps = cb0->num_default_qps;
 778         else
 779                 port->num_def_qps = 1;
 780
 781         if (!port->num_def_qps) {
 782                 ret = -EINVAL;
 783                 goto out_free;
 784         }
 785
 786         port->num_tx_qps = num_tx_qps;
 787
 788         if (port->num_def_qps >= port->num_tx_qps)
 789                 port->num_add_tx_qps = 0;
 790         else
 791                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
 792
 793         ret = 0;
 794 out_free:
 795         if (ret || netif_msg_probe(port))
 796                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
 797         kfree(cb0);
 798 out:
 799         return ret;
 800 }
 801
 802 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
 803 {
 804         struct hcp_ehea_port_cb4 *cb4;
 805         u64 hret;
 806         int ret = 0;
 807
 808         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
 809         if (!cb4) {
 810                 ehea_error("no mem for cb4");
 811                 ret = -ENOMEM;
 812                 goto out;
 813         }
 814
 815         cb4->port_speed = port_speed;
 816
 817         netif_carrier_off(port->netdev);
 818
 819         hret = ehea_h_modify_ehea_port(port->adapter->handle,
 820                                        port->logical_port_id,
 821                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
 822         if (hret == H_SUCCESS) {
 823                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
 824
 825                 hret = ehea_h_query_ehea_port(port->adapter->handle,
 826                                               port->logical_port_id,
 827                                               H_PORT_CB4, H_PORT_CB4_SPEED,
 828                                               cb4);
 829                 if (hret == H_SUCCESS) {
 830                         switch (cb4->port_speed) {
 831                         case H_SPEED_10M_H:
 832                                 port->port_speed = EHEA_SPEED_10M;
 833                                 port->full_duplex = 0;
 834                                 break;
 835                         case H_SPEED_10M_F:
 836                                 port->port_speed = EHEA_SPEED_10M;
 837                                 port->full_duplex = 1;
 838                                 break;
 839                         case H_SPEED_100M_H:
 840                                 port->port_speed = EHEA_SPEED_100M;
 841                                 port->full_duplex = 0;
 842                                 break;
 843                         case H_SPEED_100M_F:
 844                                 port->port_speed = EHEA_SPEED_100M;
 845                                 port->full_duplex = 1;
 846                                 break;
 847                         case H_SPEED_1G_F:
 848                                 port->port_speed = EHEA_SPEED_1G;
 849                                 port->full_duplex = 1;
 850                                 break;
 851                         case H_SPEED_10G_F:
 852                                 port->port_speed = EHEA_SPEED_10G;
 853                                 port->full_duplex = 1;
 854                                 break;
 855                         default:
 856                                 port->port_speed = 0;
 857                                 port->full_duplex = 0;
 858                                 break;
 859                         }
 860                 } else {
 861                         ehea_error("Failed sensing port speed");
 862                         ret = -EIO;
 863                 }
 864         } else {
 865                 if (hret == H_AUTHORITY) {
 866                         ehea_info("Hypervisor denied setting port speed");
 867                         ret = -EPERM;
 868                 } else {
 869                         ret = -EIO;
 870                         ehea_error("Failed setting port speed");
 871                 }
 872         }
 873         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
 874                 netif_carrier_on(port->netdev);
 875
 876         kfree(cb4);
 877 out:
 878         return ret;
 879 }
 880
 881 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
 882 {
 883         int ret;
 884         u8 ec;
 885         u8 portnum;
 886         struct ehea_port *port;
 887
 888         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
 889         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
 890         port = ehea_get_port(adapter, portnum);
 891
 892         switch (ec) {
 893         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
 894
 895                 if (!port) {
 896                         ehea_error("unknown portnum %x", portnum);
 897                         break;
 898                 }
 899
 900                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
 901                         if (!netif_carrier_ok(port->netdev)) {
 902                                 ret = ehea_sense_port_attr(port);
 903                                 if (ret) {
 904                                         ehea_error("failed resensing port "
 905                                                    "attributes");
 906                                         break;
 907                                 }
 908
 909                                 if (netif_msg_link(port))
 910                                         ehea_info("%s: Logical port up: %dMbps "
 911                                                   "%s Duplex",
 912                                                   port->netdev->name,
 913                                                   port->port_speed,
 914                                                   port->full_duplex ==
 915                                                   1 ? "Full" : "Half");
 916
 917                                 netif_carrier_on(port->netdev);
 918                                 netif_wake_queue(port->netdev);
 919                         }
 920                 } else
 921                         if (netif_carrier_ok(port->netdev)) {
 922                                 if (netif_msg_link(port))
 923                                         ehea_info("%s: Logical port down",
 924                                                   port->netdev->name);
 925                                 netif_carrier_off(port->netdev);
 926                                 netif_stop_queue(port->netdev);
 927                         }
 928
 929                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
 930                         port->phy_link = EHEA_PHY_LINK_UP;
 931                         if (netif_msg_link(port))
 932                                 ehea_info("%s: Physical port up",
 933                                           port->netdev->name);
 934                         if (prop_carrier_state)
 935                                 netif_carrier_on(port->netdev);
 936                 } else {
 937                         port->phy_link = EHEA_PHY_LINK_DOWN;
 938                         if (netif_msg_link(port))
 939                                 ehea_info("%s: Physical port down",
 940                                           port->netdev->name);
 941                         if (prop_carrier_state)
 942                                 netif_carrier_off(port->netdev);
 943                 }
 944
 945                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
 946                         ehea_info("External switch port is primary port");
 947                 else
 948                         ehea_info("External switch port is backup port");
 949
 950                 break;
 951         case EHEA_EC_ADAPTER_MALFUNC:
 952                 ehea_error("Adapter malfunction");
 953                 break;
 954         case EHEA_EC_PORT_MALFUNC:
 955                 ehea_info("Port malfunction: Device: %s", port->netdev->name);
 956                 netif_carrier_off(port->netdev);
 957                 netif_stop_queue(port->netdev);
 958                 break;
 959         default:
 960                 ehea_error("unknown event code %x, eqe=0x%lX", ec, eqe);
 961                 break;
 962         }
 963 }
 964
 965 static void ehea_neq_tasklet(unsigned long data)
 966 {
 967         struct ehea_adapter *adapter = (struct ehea_adapter*)data;
 968         struct ehea_eqe *eqe;
 969         u64 event_mask;
 970
 971         eqe = ehea_poll_eq(adapter->neq);
 972         ehea_debug("eqe=%p", eqe);
 973
 974         while (eqe) {
 975                 ehea_debug("*eqe=%lx", eqe->entry);
 976                 ehea_parse_eqe(adapter, eqe->entry);
 977                 eqe = ehea_poll_eq(adapter->neq);
 978                 ehea_debug("next eqe=%p", eqe);
 979         }
 980
 981         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
 982                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
 983                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
 984
 985         ehea_h_reset_events(adapter->handle,
 986                             adapter->neq->fw_handle, event_mask);
 987 }
 988
 989 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
 990 {
 991         struct ehea_adapter *adapter = param;
 992         tasklet_hi_schedule(&adapter->neq_tasklet);
 993         return IRQ_HANDLED;
 994 }
 995
 996
 997 static int ehea_fill_port_res(struct ehea_port_res *pr)
 998 {
 999         int ret;
1000         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1001
1002         ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1003                                      - init_attr->act_nr_rwqes_rq2
1004                                      - init_attr->act_nr_rwqes_rq3 - 1);
1005
1006         ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1007
1008         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1009
1010         return ret;
1011 }
1012
1013 static int ehea_reg_interrupts(struct net_device *dev)
1014 {
1015         struct ehea_port *port = netdev_priv(dev);
1016         struct ehea_port_res *pr;
1017         int i, ret;
1018
1019
1020         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1021                  dev->name);
1022
1023         ret = ibmebus_request_irq(NULL, port->qp_eq->attr.ist1,
1024                                   ehea_qp_aff_irq_handler,
1025                                   IRQF_DISABLED, port->int_aff_name, port);
1026         if (ret) {
1027                 ehea_error("failed registering irq for qp_aff_irq_handler:"
1028                            "ist=%X", port->qp_eq->attr.ist1);
1029                 goto out_free_qpeq;
1030         }
1031
1032         if (netif_msg_ifup(port))
1033                 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1034                           "registered", port->qp_eq->attr.ist1);
1035
1036
1037         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1038                 pr = &port->port_res[i];
1039                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1040                          "%s-queue%d", dev->name, i);
1041                 ret = ibmebus_request_irq(NULL, pr->eq->attr.ist1,
1042                                           ehea_recv_irq_handler,
1043                                           IRQF_DISABLED, pr->int_send_name,
1044                                           pr);
1045                 if (ret) {
1046                         ehea_error("failed registering irq for ehea_queue "
1047                                    "port_res_nr:%d, ist=%X", i,
1048                                    pr->eq->attr.ist1);
1049                         goto out_free_req;
1050                 }
1051                 if (netif_msg_ifup(port))
1052                         ehea_info("irq_handle 0x%X for function ehea_queue_int "
1053                                   "%d registered", pr->eq->attr.ist1, i);
1054         }
1055 out:
1056         return ret;
1057
1058
1059 out_free_req:
1060         while (--i >= 0) {
1061                 u32 ist = port->port_res[i].eq->attr.ist1;
1062                 ibmebus_free_irq(NULL, ist, &port->port_res[i]);
1063         }
1064
1065 out_free_qpeq:
1066         ibmebus_free_irq(NULL, port->qp_eq->attr.ist1, port);
1067         i = port->num_def_qps;
1068
1069         goto out;
1070
1071 }
1072
1073 static void ehea_free_interrupts(struct net_device *dev)
1074 {
1075         struct ehea_port *port = netdev_priv(dev);
1076         struct ehea_port_res *pr;
1077         int i;
1078
1079         /* send */
1080
1081         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1082                 pr = &port->port_res[i];
1083                 ibmebus_free_irq(NULL, pr->eq->attr.ist1, pr);
1084                 if (netif_msg_intr(port))
1085                         ehea_info("free send irq for res %d with handle 0x%X",
1086                                   i, pr->eq->attr.ist1);
1087         }
1088
1089         /* associated events */
1090         ibmebus_free_irq(NULL, port->qp_eq->attr.ist1, port);
1091         if (netif_msg_intr(port))
1092                 ehea_info("associated event interrupt for handle 0x%X freed",
1093                           port->qp_eq->attr.ist1);
1094 }
1095
1096 static int ehea_configure_port(struct ehea_port *port)
1097 {
1098         int ret, i;
1099         u64 hret, mask;
1100         struct hcp_ehea_port_cb0 *cb0;
1101
1102         ret = -ENOMEM;
1103         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1104         if (!cb0)
1105                 goto out;
1106
1107         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1108                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1109                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1110                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1111                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1112                                       PXLY_RC_VLAN_FILTER)
1113                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1114
1115         for (i = 0; i < port->num_mcs; i++)
1116                 if (use_mcs)
1117                         cb0->default_qpn_arr[i] =
1118                                 port->port_res[i].qp->init_attr.qp_nr;
1119                 else
1120                         cb0->default_qpn_arr[i] =
1121                                 port->port_res[0].qp->init_attr.qp_nr;
1122
1123         if (netif_msg_ifup(port))
1124                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1125
1126         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1127              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1128
1129         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1130                                        port->logical_port_id,
1131                                        H_PORT_CB0, mask, cb0);
1132         ret = -EIO;
1133         if (hret != H_SUCCESS)
1134                 goto out_free;
1135
1136         ret = 0;
1137
1138 out_free:
1139         kfree(cb0);
1140 out:
1141         return ret;
1142 }
1143
1144 int ehea_gen_smrs(struct ehea_port_res *pr)
1145 {
1146         int ret;
1147         struct ehea_adapter *adapter = pr->port->adapter;
1148
1149         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1150         if (ret)
1151                 goto out;
1152
1153         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1154         if (ret)
1155                 goto out_free;
1156
1157         return 0;
1158
1159 out_free:
1160         ehea_rem_mr(&pr->send_mr);
1161 out:
1162         ehea_error("Generating SMRS failed\n");
1163         return -EIO;
1164 }
1165
1166 int ehea_rem_smrs(struct ehea_port_res *pr)
1167 {
1168         if ((ehea_rem_mr(&pr->send_mr))
1169             || (ehea_rem_mr(&pr->recv_mr)))
1170                 return -EIO;
1171         else
1172                 return 0;
1173 }
1174
1175 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1176 {
1177         int arr_size = sizeof(void*) * max_q_entries;
1178
1179         q_skba->arr = vmalloc(arr_size);
1180         if (!q_skba->arr)
1181                 return -ENOMEM;
1182
1183         memset(q_skba->arr, 0, arr_size);
1184
1185         q_skba->len = max_q_entries;
1186         q_skba->index = 0;
1187         q_skba->os_skbs = 0;
1188
1189         return 0;
1190 }
1191
1192 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1193                               struct port_res_cfg *pr_cfg, int queue_token)
1194 {
1195         struct ehea_adapter *adapter = port->adapter;
1196         enum ehea_eq_type eq_type = EHEA_EQ;
1197         struct ehea_qp_init_attr *init_attr = NULL;
1198         int ret = -EIO;
1199
1200         memset(pr, 0, sizeof(struct ehea_port_res));
1201
1202         pr->port = port;
1203         spin_lock_init(&pr->xmit_lock);
1204         spin_lock_init(&pr->netif_queue);
1205
1206         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1207         if (!pr->eq) {
1208                 ehea_error("create_eq failed (eq)");
1209                 goto out_free;
1210         }
1211
1212         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1213                                      pr->eq->fw_handle,
1214                                      port->logical_port_id);
1215         if (!pr->recv_cq) {
1216                 ehea_error("create_cq failed (cq_recv)");
1217                 goto out_free;
1218         }
1219
1220         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1221                                      pr->eq->fw_handle,
1222                                      port->logical_port_id);
1223         if (!pr->send_cq) {
1224                 ehea_error("create_cq failed (cq_send)");
1225                 goto out_free;
1226         }
1227
1228         if (netif_msg_ifup(port))
1229                 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1230                           pr->send_cq->attr.act_nr_of_cqes,
1231                           pr->recv_cq->attr.act_nr_of_cqes);
1232
1233         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1234         if (!init_attr) {
1235                 ret = -ENOMEM;
1236                 ehea_error("no mem for ehea_qp_init_attr");
1237                 goto out_free;
1238         }
1239
1240         init_attr->low_lat_rq1 = 1;
1241         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1242         init_attr->rq_count = 3;
1243         init_attr->qp_token = queue_token;
1244         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1245         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1246         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1247         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1248         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1249         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1250         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1251         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1252         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1253         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1254         init_attr->port_nr = port->logical_port_id;
1255         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1256         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1257         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1258
1259         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1260         if (!pr->qp) {
1261                 ehea_error("create_qp failed");
1262                 ret = -EIO;
1263                 goto out_free;
1264         }
1265
1266         if (netif_msg_ifup(port))
1267                 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1268                           "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1269                           init_attr->act_nr_send_wqes,
1270                           init_attr->act_nr_rwqes_rq1,
1271                           init_attr->act_nr_rwqes_rq2,
1272                           init_attr->act_nr_rwqes_rq3);
1273
1274         ret = ehea_init_q_skba(&pr->sq_skba, init_attr->act_nr_send_wqes + 1);
1275         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1276         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1277         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1278         if (ret)
1279                 goto out_free;
1280
1281         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1282         if (ehea_gen_smrs(pr) != 0) {
1283                 ret = -EIO;
1284                 goto out_free;
1285         }
1286
1287         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1288
1289         kfree(init_attr);
1290
1291         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1292
1293         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1294         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1295         pr->lro_mgr.lro_arr = pr->lro_desc;
1296         pr->lro_mgr.get_skb_header = get_skb_hdr;
1297         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1298         pr->lro_mgr.dev = port->netdev;
1299         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1300         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1301
1302         ret = 0;
1303         goto out;
1304
1305 out_free:
1306         kfree(init_attr);
1307         vfree(pr->sq_skba.arr);
1308         vfree(pr->rq1_skba.arr);
1309         vfree(pr->rq2_skba.arr);
1310         vfree(pr->rq3_skba.arr);
1311         ehea_destroy_qp(pr->qp);
1312         ehea_destroy_cq(pr->send_cq);
1313         ehea_destroy_cq(pr->recv_cq);
1314         ehea_destroy_eq(pr->eq);
1315 out:
1316         return ret;
1317 }
1318
1319 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1320 {
1321         int ret, i;
1322
1323         ret = ehea_destroy_qp(pr->qp);
1324
1325         if (!ret) {
1326                 ehea_destroy_cq(pr->send_cq);
1327                 ehea_destroy_cq(pr->recv_cq);
1328                 ehea_destroy_eq(pr->eq);
1329
1330                 for (i = 0; i < pr->rq1_skba.len; i++)
1331                         if (pr->rq1_skba.arr[i])
1332                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1333
1334                 for (i = 0; i < pr->rq2_skba.len; i++)
1335                         if (pr->rq2_skba.arr[i])
1336                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1337
1338                 for (i = 0; i < pr->rq3_skba.len; i++)
1339                         if (pr->rq3_skba.arr[i])
1340                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1341
1342                 for (i = 0; i < pr->sq_skba.len; i++)
1343                         if (pr->sq_skba.arr[i])
1344                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1345
1346                 vfree(pr->rq1_skba.arr);
1347                 vfree(pr->rq2_skba.arr);
1348                 vfree(pr->rq3_skba.arr);
1349                 vfree(pr->sq_skba.arr);
1350                 ret = ehea_rem_smrs(pr);
1351         }
1352         return ret;
1353 }
1354
1355 /*
1356  * The write_* functions store information in swqe which is used by
1357  * the hardware to calculate the ip/tcp/udp checksum
1358  */
1359
1360 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1361                                       const struct sk_buff *skb)
1362 {
1363         swqe->ip_start = skb_network_offset(skb);
1364         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1365 }
1366
1367 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1368                                         const struct sk_buff *skb)
1369 {
1370         swqe->tcp_offset =
1371                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1372
1373         swqe->tcp_end = (u16)skb->len - 1;
1374 }
1375
1376 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1377                                         const struct sk_buff *skb)
1378 {
1379         swqe->tcp_offset =
1380                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1381
1382         swqe->tcp_end = (u16)skb->len - 1;
1383 }
1384
1385
1386 static void write_swqe2_TSO(struct sk_buff *skb,
1387                             struct ehea_swqe *swqe, u32 lkey)
1388 {
1389         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1390         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1391         int skb_data_size = skb->len - skb->data_len;
1392         int headersize;
1393
1394         /* Packet is TCP with TSO enabled */
1395         swqe->tx_control |= EHEA_SWQE_TSO;
1396         swqe->mss = skb_shinfo(skb)->gso_size;
1397         /* copy only eth/ip/tcp headers to immediate data and
1398          * the rest of skb->data to sg1entry
1399          */
1400         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1401
1402         skb_data_size = skb->len - skb->data_len;
1403
1404         if (skb_data_size >= headersize) {
1405                 /* copy immediate data */
1406                 skb_copy_from_linear_data(skb, imm_data, headersize);
1407                 swqe->immediate_data_length = headersize;
1408
1409                 if (skb_data_size > headersize) {
1410                         /* set sg1entry data */
1411                         sg1entry->l_key = lkey;
1412                         sg1entry->len = skb_data_size - headersize;
1413                         sg1entry->vaddr =
1414                                 ehea_map_vaddr(skb->data + headersize);
1415                         swqe->descriptors++;
1416                 }
1417         } else
1418                 ehea_error("cannot handle fragmented headers");
1419 }
1420
1421 static void write_swqe2_nonTSO(struct sk_buff *skb,
1422                                struct ehea_swqe *swqe, u32 lkey)
1423 {
1424         int skb_data_size = skb->len - skb->data_len;
1425         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1426         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1427
1428         /* Packet is any nonTSO type
1429          *
1430          * Copy as much as possible skb->data to immediate data and
1431          * the rest to sg1entry
1432          */
1433         if (skb_data_size >= SWQE2_MAX_IMM) {
1434                 /* copy immediate data */
1435                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1436
1437                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1438
1439                 if (skb_data_size > SWQE2_MAX_IMM) {
1440                         /* copy sg1entry data */
1441                         sg1entry->l_key = lkey;
1442                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1443                         sg1entry->vaddr =
1444                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1445                         swqe->descriptors++;
1446                 }
1447         } else {
1448                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1449                 swqe->immediate_data_length = skb_data_size;
1450         }
1451 }
1452
1453 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1454                                     struct ehea_swqe *swqe, u32 lkey)
1455 {
1456         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1457         skb_frag_t *frag;
1458         int nfrags, sg1entry_contains_frag_data, i;
1459
1460         nfrags = skb_shinfo(skb)->nr_frags;
1461         sg1entry = &swqe->u.immdata_desc.sg_entry;
1462         sg_list = (struct ehea_vsgentry*)&swqe->u.immdata_desc.sg_list;
1463         swqe->descriptors = 0;
1464         sg1entry_contains_frag_data = 0;
1465
1466         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1467                 write_swqe2_TSO(skb, swqe, lkey);
1468         else
1469                 write_swqe2_nonTSO(skb, swqe, lkey);
1470
1471         /* write descriptors */
1472         if (nfrags > 0) {
1473                 if (swqe->descriptors == 0) {
1474                         /* sg1entry not yet used */
1475                         frag = &skb_shinfo(skb)->frags[0];
1476
1477                         /* copy sg1entry data */
1478                         sg1entry->l_key = lkey;
1479                         sg1entry->len = frag->size;
1480                         sg1entry->vaddr =
1481                                 ehea_map_vaddr(page_address(frag->page)
1482                                                + frag->page_offset);
1483                         swqe->descriptors++;
1484                         sg1entry_contains_frag_data = 1;
1485                 }
1486
1487                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1488
1489                         frag = &skb_shinfo(skb)->frags[i];
1490                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1491
1492                         sgentry->l_key = lkey;
1493                         sgentry->len = frag->size;
1494                         sgentry->vaddr =
1495                                 ehea_map_vaddr(page_address(frag->page)
1496                                                + frag->page_offset);
1497                         swqe->descriptors++;
1498                 }
1499         }
1500 }
1501
1502 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1503 {
1504         int ret = 0;
1505         u64 hret;
1506         u8 reg_type;
1507
1508         /* De/Register untagged packets */
1509         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1510         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1511                                      port->logical_port_id,
1512                                      reg_type, port->mac_addr, 0, hcallid);
1513         if (hret != H_SUCCESS) {
1514                 ehea_error("%sregistering bc address failed (tagged)",
1515                            hcallid == H_REG_BCMC ? "" : "de");
1516                 ret = -EIO;
1517                 goto out_herr;
1518         }
1519
1520         /* De/Register VLAN packets */
1521         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1522         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1523                                      port->logical_port_id,
1524                                      reg_type, port->mac_addr, 0, hcallid);
1525         if (hret != H_SUCCESS) {
1526                 ehea_error("%sregistering bc address failed (vlan)",
1527                            hcallid == H_REG_BCMC ? "" : "de");
1528                 ret = -EIO;
1529         }
1530 out_herr:
1531         return ret;
1532 }
1533
1534 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1535 {
1536         struct ehea_port *port = netdev_priv(dev);
1537         struct sockaddr *mac_addr = sa;
1538         struct hcp_ehea_port_cb0 *cb0;
1539         int ret;
1540         u64 hret;
1541
1542         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1543                 ret = -EADDRNOTAVAIL;
1544                 goto out;
1545         }
1546
1547         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1548         if (!cb0) {
1549                 ehea_error("no mem for cb0");
1550                 ret = -ENOMEM;
1551                 goto out;
1552         }
1553
1554         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1555
1556         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1557
1558         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1559                                        port->logical_port_id, H_PORT_CB0,
1560                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1561         if (hret != H_SUCCESS) {
1562                 ret = -EIO;
1563                 goto out_free;
1564         }
1565
1566         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1567
1568         /* Deregister old MAC in pHYP */
1569         ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1570         if (ret)
1571                 goto out_free;
1572
1573         port->mac_addr = cb0->port_mac_addr << 16;
1574
1575         /* Register new MAC in pHYP */
1576         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1577         if (ret)
1578                 goto out_free;
1579
1580         ret = 0;
1581 out_free:
1582         kfree(cb0);
1583 out:
1584         return ret;
1585 }
1586
1587 static void ehea_promiscuous_error(u64 hret, int enable)
1588 {
1589         if (hret == H_AUTHORITY)
1590                 ehea_info("Hypervisor denied %sabling promiscuous mode",
1591                           enable == 1 ? "en" : "dis");
1592         else
1593                 ehea_error("failed %sabling promiscuous mode",
1594                            enable == 1 ? "en" : "dis");
1595 }
1596
1597 static void ehea_promiscuous(struct net_device *dev, int enable)
1598 {
1599         struct ehea_port *port = netdev_priv(dev);
1600         struct hcp_ehea_port_cb7 *cb7;
1601         u64 hret;
1602
1603         if ((enable && port->promisc) || (!enable && !port->promisc))
1604                 return;
1605
1606         cb7 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
1607         if (!cb7) {
1608                 ehea_error("no mem for cb7");
1609                 goto out;
1610         }
1611
1612         /* Modify Pxs_DUCQPN in CB7 */
1613         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1614
1615         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1616                                        port->logical_port_id,
1617                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1618         if (hret) {
1619                 ehea_promiscuous_error(hret, enable);
1620                 goto out;
1621         }
1622
1623         port->promisc = enable;
1624 out:
1625         kfree(cb7);
1626         return;
1627 }
1628
1629 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1630                                      u32 hcallid)
1631 {
1632         u64 hret;
1633         u8 reg_type;
1634
1635         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1636                  | EHEA_BCMC_UNTAGGED;
1637
1638         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1639                                      port->logical_port_id,
1640                                      reg_type, mc_mac_addr, 0, hcallid);
1641         if (hret)
1642                 goto out;
1643
1644         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1645                  | EHEA_BCMC_VLANID_ALL;
1646
1647         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1648                                      port->logical_port_id,
1649                                      reg_type, mc_mac_addr, 0, hcallid);
1650 out:
1651         return hret;
1652 }
1653
1654 static int ehea_drop_multicast_list(struct net_device *dev)
1655 {
1656         struct ehea_port *port = netdev_priv(dev);
1657         struct ehea_mc_list *mc_entry = port->mc_list;
1658         struct list_head *pos;
1659         struct list_head *temp;
1660         int ret = 0;
1661         u64 hret;
1662
1663         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1664                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1665
1666                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1667                                                  H_DEREG_BCMC);
1668                 if (hret) {
1669                         ehea_error("failed deregistering mcast MAC");
1670                         ret = -EIO;
1671                 }
1672
1673                 list_del(pos);
1674                 kfree(mc_entry);
1675         }
1676         return ret;
1677 }
1678
1679 static void ehea_allmulti(struct net_device *dev, int enable)
1680 {
1681         struct ehea_port *port = netdev_priv(dev);
1682         u64 hret;
1683
1684         if (!port->allmulti) {
1685                 if (enable) {
1686                         /* Enable ALLMULTI */
1687                         ehea_drop_multicast_list(dev);
1688                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1689                         if (!hret)
1690                                 port->allmulti = 1;
1691                         else
1692                                 ehea_error("failed enabling IFF_ALLMULTI");
1693                 }
1694         } else
1695                 if (!enable) {
1696                         /* Disable ALLMULTI */
1697                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1698                         if (!hret)
1699                                 port->allmulti = 0;
1700                         else
1701                                 ehea_error("failed disabling IFF_ALLMULTI");
1702                 }
1703 }
1704
1705 static void ehea_add_multicast_entry(struct ehea_port* port, u8* mc_mac_addr)
1706 {
1707         struct ehea_mc_list *ehea_mcl_entry;
1708         u64 hret;
1709
1710         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1711         if (!ehea_mcl_entry) {
1712                 ehea_error("no mem for mcl_entry");
1713                 return;
1714         }
1715
1716         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1717
1718         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1719
1720         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1721                                          H_REG_BCMC);
1722         if (!hret)
1723                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1724         else {
1725                 ehea_error("failed registering mcast MAC");
1726                 kfree(ehea_mcl_entry);
1727         }
1728 }
1729
1730 static void ehea_set_multicast_list(struct net_device *dev)
1731 {
1732         struct ehea_port *port = netdev_priv(dev);
1733         struct dev_mc_list *k_mcl_entry;
1734         int ret, i;
1735
1736         if (dev->flags & IFF_PROMISC) {
1737                 ehea_promiscuous(dev, 1);
1738                 return;
1739         }
1740         ehea_promiscuous(dev, 0);
1741
1742         if (dev->flags & IFF_ALLMULTI) {
1743                 ehea_allmulti(dev, 1);
1744                 return;
1745         }
1746         ehea_allmulti(dev, 0);
1747
1748         if (dev->mc_count) {
1749                 ret = ehea_drop_multicast_list(dev);
1750                 if (ret) {
1751                         /* Dropping the current multicast list failed.
1752                          * Enabling ALL_MULTI is the best we can do.
1753                          */
1754                         ehea_allmulti(dev, 1);
1755                 }
1756
1757                 if (dev->mc_count > port->adapter->max_mc_mac) {
1758                         ehea_info("Mcast registration limit reached (0x%lx). "
1759                                   "Use ALLMULTI!",
1760                                   port->adapter->max_mc_mac);
1761                         goto out;
1762                 }
1763
1764                 for (i = 0, k_mcl_entry = dev->mc_list;
1765                      i < dev->mc_count;
1766                      i++, k_mcl_entry = k_mcl_entry->next) {
1767                         ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1768                 }
1769         }
1770 out:
1771         return;
1772 }
1773
1774 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1775 {
1776         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1777                 return -EINVAL;
1778         dev->mtu = new_mtu;
1779         return 0;
1780 }
1781
1782 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1783                        struct ehea_swqe *swqe, u32 lkey)
1784 {
1785         if (skb->protocol == htons(ETH_P_IP)) {
1786                 const struct iphdr *iph = ip_hdr(skb);
1787
1788                 /* IPv4 */
1789                 swqe->tx_control |= EHEA_SWQE_CRC
1790                                  | EHEA_SWQE_IP_CHECKSUM
1791                                  | EHEA_SWQE_TCP_CHECKSUM
1792                                  | EHEA_SWQE_IMM_DATA_PRESENT
1793                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
1794
1795                 write_ip_start_end(swqe, skb);
1796
1797                 if (iph->protocol == IPPROTO_UDP) {
1798                         if ((iph->frag_off & IP_MF)
1799                             || (iph->frag_off & IP_OFFSET))
1800                                 /* IP fragment, so don't change cs */
1801                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
1802                         else
1803                                 write_udp_offset_end(swqe, skb);
1804                 } else if (iph->protocol == IPPROTO_TCP) {
1805                         write_tcp_offset_end(swqe, skb);
1806                 }
1807
1808                 /* icmp (big data) and ip segmentation packets (all other ip
1809                    packets) do not require any special handling */
1810
1811         } else {
1812                 /* Other Ethernet Protocol */
1813                 swqe->tx_control |= EHEA_SWQE_CRC
1814                                  | EHEA_SWQE_IMM_DATA_PRESENT
1815                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
1816         }
1817
1818         write_swqe2_data(skb, dev, swqe, lkey);
1819 }
1820
1821 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
1822                        struct ehea_swqe *swqe)
1823 {
1824         int nfrags = skb_shinfo(skb)->nr_frags;
1825         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
1826         skb_frag_t *frag;
1827         int i;
1828
1829         if (skb->protocol == htons(ETH_P_IP)) {
1830                 const struct iphdr *iph = ip_hdr(skb);
1831
1832                 /* IPv4 */
1833                 write_ip_start_end(swqe, skb);
1834
1835                 if (iph->protocol == IPPROTO_TCP) {
1836                         swqe->tx_control |= EHEA_SWQE_CRC
1837                                          | EHEA_SWQE_IP_CHECKSUM
1838                                          | EHEA_SWQE_TCP_CHECKSUM
1839                                          | EHEA_SWQE_IMM_DATA_PRESENT;
1840
1841                         write_tcp_offset_end(swqe, skb);
1842
1843                 } else if (iph->protocol == IPPROTO_UDP) {
1844                         if ((iph->frag_off & IP_MF)
1845                             || (iph->frag_off & IP_OFFSET))
1846                                 /* IP fragment, so don't change cs */
1847                                 swqe->tx_control |= EHEA_SWQE_CRC
1848                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
1849                         else {
1850                                 swqe->tx_control |= EHEA_SWQE_CRC
1851                                                  | EHEA_SWQE_IP_CHECKSUM
1852                                                  | EHEA_SWQE_TCP_CHECKSUM
1853                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
1854
1855                                 write_udp_offset_end(swqe, skb);
1856                         }
1857                 } else {
1858                         /* icmp (big data) and
1859                            ip segmentation packets (all other ip packets) */
1860                         swqe->tx_control |= EHEA_SWQE_CRC
1861                                          | EHEA_SWQE_IP_CHECKSUM
1862                                          | EHEA_SWQE_IMM_DATA_PRESENT;
1863                 }
1864         } else {
1865                 /* Other Ethernet Protocol */
1866                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
1867         }
1868         /* copy (immediate) data */
1869         if (nfrags == 0) {
1870                 /* data is in a single piece */
1871                 skb_copy_from_linear_data(skb, imm_data, skb->len);
1872         } else {
1873                 /* first copy data from the skb->data buffer ... */
1874                 skb_copy_from_linear_data(skb, imm_data,
1875                                           skb->len - skb->data_len);
1876                 imm_data += skb->len - skb->data_len;
1877
1878                 /* ... then copy data from the fragments */
1879                 for (i = 0; i < nfrags; i++) {
1880                         frag = &skb_shinfo(skb)->frags[i];
1881                         memcpy(imm_data,
1882                                page_address(frag->page) + frag->page_offset,
1883                                frag->size);
1884                         imm_data += frag->size;
1885                 }
1886         }
1887         swqe->immediate_data_length = skb->len;
1888         dev_kfree_skb(skb);
1889 }
1890
1891 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
1892 {
1893         struct tcphdr *tcp;
1894         u32 tmp;
1895
1896         if ((skb->protocol == htons(ETH_P_IP)) &&
1897             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
1898                 tcp = (struct tcphdr*)(skb_network_header(skb) + (ip_hdr(skb)->ihl * 4));
1899                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
1900                 tmp += ip_hdr(skb)->daddr % 31;
1901                 return tmp % num_qps;
1902         }
1903         else
1904                 return 0;
1905 }
1906
1907 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
1908 {
1909         struct ehea_port *port = netdev_priv(dev);
1910         struct ehea_swqe *swqe;
1911         unsigned long flags;
1912         u32 lkey;
1913         int swqe_index;
1914         struct ehea_port_res *pr;
1915
1916         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
1917
1918         if (!spin_trylock(&pr->xmit_lock))
1919                 return NETDEV_TX_BUSY;
1920
1921         if (pr->queue_stopped) {
1922                 spin_unlock(&pr->xmit_lock);
1923                 return NETDEV_TX_BUSY;
1924         }
1925
1926         swqe = ehea_get_swqe(pr->qp, &swqe_index);
1927         memset(swqe, 0, SWQE_HEADER_SIZE);
1928         atomic_dec(&pr->swqe_avail);
1929
1930         if (skb->len <= SWQE3_MAX_IMM) {
1931                 u32 sig_iv = port->sig_comp_iv;
1932                 u32 swqe_num = pr->swqe_id_counter;
1933                 ehea_xmit3(skb, dev, swqe);
1934                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
1935                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
1936                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
1937                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
1938                                                       sig_iv);
1939                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1940                         pr->swqe_ll_count = 0;
1941                 } else
1942                         pr->swqe_ll_count += 1;
1943         } else {
1944                 swqe->wr_id =
1945                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
1946                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
1947                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
1948                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
1949                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
1950
1951                 pr->sq_skba.index++;
1952                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
1953
1954                 lkey = pr->send_mr.lkey;
1955                 ehea_xmit2(skb, dev, swqe, lkey);
1956                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1957         }
1958         pr->swqe_id_counter += 1;
1959
1960         if (port->vgrp && vlan_tx_tag_present(skb)) {
1961                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
1962                 swqe->vlan_tag = vlan_tx_tag_get(skb);
1963         }
1964
1965         if (netif_msg_tx_queued(port)) {
1966                 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
1967                 ehea_dump(swqe, 512, "swqe");
1968         }
1969
1970         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)))
1971                 goto out;
1972
1973         ehea_post_swqe(pr->qp, swqe);
1974         pr->tx_packets++;
1975
1976         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
1977                 spin_lock_irqsave(&pr->netif_queue, flags);
1978                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
1979                         pr->p_stats.queue_stopped++;
1980                         netif_stop_queue(dev);
1981                         pr->queue_stopped = 1;
1982                 }
1983                 spin_unlock_irqrestore(&pr->netif_queue, flags);
1984         }
1985         dev->trans_start = jiffies;
1986         spin_unlock(&pr->xmit_lock);
1987 out:
1988         return NETDEV_TX_OK;
1989 }
1990
1991 static void ehea_vlan_rx_register(struct net_device *dev,
1992                                   struct vlan_group *grp)
1993 {
1994         struct ehea_port *port = netdev_priv(dev);
1995         struct ehea_adapter *adapter = port->adapter;
1996         struct hcp_ehea_port_cb1 *cb1;
1997         u64 hret;
1998
1999         port->vgrp = grp;
2000
2001         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2002         if (!cb1) {
2003                 ehea_error("no mem for cb1");
2004                 goto out;
2005         }
2006
2007         memset(cb1->vlan_filter, 0, sizeof(cb1->vlan_filter));
2008
2009         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2010                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2011         if (hret != H_SUCCESS)
2012                 ehea_error("modify_ehea_port failed");
2013
2014         kfree(cb1);
2015 out:
2016         return;
2017 }
2018
2019 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2020 {
2021         struct ehea_port *port = netdev_priv(dev);
2022         struct ehea_adapter *adapter = port->adapter;
2023         struct hcp_ehea_port_cb1 *cb1;
2024         int index;
2025         u64 hret;
2026
2027         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2028         if (!cb1) {
2029                 ehea_error("no mem for cb1");
2030                 goto out;
2031         }
2032
2033         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2034                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2035         if (hret != H_SUCCESS) {
2036                 ehea_error("query_ehea_port failed");
2037                 goto out;
2038         }
2039
2040         index = (vid / 64);
2041         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2042
2043         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2044                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2045         if (hret != H_SUCCESS)
2046                 ehea_error("modify_ehea_port failed");
2047 out:
2048         kfree(cb1);
2049         return;
2050 }
2051
2052 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2053 {
2054         struct ehea_port *port = netdev_priv(dev);
2055         struct ehea_adapter *adapter = port->adapter;
2056         struct hcp_ehea_port_cb1 *cb1;
2057         int index;
2058         u64 hret;
2059
2060         vlan_group_set_device(port->vgrp, vid, NULL);
2061
2062         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2063         if (!cb1) {
2064                 ehea_error("no mem for cb1");
2065                 goto out;
2066         }
2067
2068         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2069                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2070         if (hret != H_SUCCESS) {
2071                 ehea_error("query_ehea_port failed");
2072                 goto out;
2073         }
2074
2075         index = (vid / 64);
2076         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2077
2078         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2079                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2080         if (hret != H_SUCCESS)
2081                 ehea_error("modify_ehea_port failed");
2082 out:
2083         kfree(cb1);
2084         return;
2085 }
2086
2087 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2088 {
2089         int ret = -EIO;
2090         u64 hret;
2091         u16 dummy16 = 0;
2092         u64 dummy64 = 0;
2093         struct hcp_modify_qp_cb0* cb0;
2094
2095         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2096         if (!cb0) {
2097                 ret = -ENOMEM;
2098                 goto out;
2099         }
2100
2101         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2102                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2103         if (hret != H_SUCCESS) {
2104                 ehea_error("query_ehea_qp failed (1)");
2105                 goto out;
2106         }
2107
2108         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2109         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2110                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2111                                      &dummy64, &dummy64, &dummy16, &dummy16);
2112         if (hret != H_SUCCESS) {
2113                 ehea_error("modify_ehea_qp failed (1)");
2114                 goto out;
2115         }
2116
2117         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2118                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2119         if (hret != H_SUCCESS) {
2120                 ehea_error("query_ehea_qp failed (2)");
2121                 goto out;
2122         }
2123
2124         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2125         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2126                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2127                                      &dummy64, &dummy64, &dummy16, &dummy16);
2128         if (hret != H_SUCCESS) {
2129                 ehea_error("modify_ehea_qp failed (2)");
2130                 goto out;
2131         }
2132
2133         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2134                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2135         if (hret != H_SUCCESS) {
2136                 ehea_error("query_ehea_qp failed (3)");
2137                 goto out;
2138         }
2139
2140         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2141         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2142                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2143                                      &dummy64, &dummy64, &dummy16, &dummy16);
2144         if (hret != H_SUCCESS) {
2145                 ehea_error("modify_ehea_qp failed (3)");
2146                 goto out;
2147         }
2148
2149         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2150                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2151         if (hret != H_SUCCESS) {
2152                 ehea_error("query_ehea_qp failed (4)");
2153                 goto out;
2154         }
2155
2156         ret = 0;
2157 out:
2158         kfree(cb0);
2159         return ret;
2160 }
2161
2162 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2163                                int add_tx_qps)
2164 {
2165         int ret, i;
2166         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2167         enum ehea_eq_type eq_type = EHEA_EQ;
2168
2169         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2170                                    EHEA_MAX_ENTRIES_EQ, 1);
2171         if (!port->qp_eq) {
2172                 ret = -EINVAL;
2173                 ehea_error("ehea_create_eq failed (qp_eq)");
2174                 goto out_kill_eq;
2175         }
2176
2177         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2178         pr_cfg.max_entries_scq = sq_entries * 2;
2179         pr_cfg.max_entries_sq = sq_entries;
2180         pr_cfg.max_entries_rq1 = rq1_entries;
2181         pr_cfg.max_entries_rq2 = rq2_entries;
2182         pr_cfg.max_entries_rq3 = rq3_entries;
2183
2184         pr_cfg_small_rx.max_entries_rcq = 1;
2185         pr_cfg_small_rx.max_entries_scq = sq_entries;
2186         pr_cfg_small_rx.max_entries_sq = sq_entries;
2187         pr_cfg_small_rx.max_entries_rq1 = 1;
2188         pr_cfg_small_rx.max_entries_rq2 = 1;
2189         pr_cfg_small_rx.max_entries_rq3 = 1;
2190
2191         for (i = 0; i < def_qps; i++) {
2192                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2193                 if (ret)
2194                         goto out_clean_pr;
2195         }
2196         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2197                 ret = ehea_init_port_res(port, &port->port_res[i],
2198                                          &pr_cfg_small_rx, i);
2199                 if (ret)
2200                         goto out_clean_pr;
2201         }
2202
2203         return 0;
2204
2205 out_clean_pr:
2206         while (--i >= 0)
2207                 ehea_clean_portres(port, &port->port_res[i]);
2208
2209 out_kill_eq:
2210         ehea_destroy_eq(port->qp_eq);
2211         return ret;
2212 }
2213
2214 static int ehea_clean_all_portres(struct ehea_port *port)
2215 {
2216         int ret = 0;
2217         int i;
2218
2219         for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2220                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2221
2222         ret |= ehea_destroy_eq(port->qp_eq);
2223
2224         return ret;
2225 }
2226
2227 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2228 {
2229         if (adapter->active_ports)
2230                 return;
2231
2232         ehea_rem_mr(&adapter->mr);
2233 }
2234
2235 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2236 {
2237         if (adapter->active_ports)
2238                 return 0;
2239
2240         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2241 }
2242
2243 static int ehea_up(struct net_device *dev)
2244 {
2245         int ret, i;
2246         struct ehea_port *port = netdev_priv(dev);
2247
2248         if (port->state == EHEA_PORT_UP)
2249                 return 0;
2250
2251         ret = ehea_port_res_setup(port, port->num_def_qps,
2252                                   port->num_add_tx_qps);
2253         if (ret) {
2254                 ehea_error("port_res_failed");
2255                 goto out;
2256         }
2257
2258         /* Set default QP for this port */
2259         ret = ehea_configure_port(port);
2260         if (ret) {
2261                 ehea_error("ehea_configure_port failed. ret:%d", ret);
2262                 goto out_clean_pr;
2263         }
2264
2265         ret = ehea_reg_interrupts(dev);
2266         if (ret) {
2267                 ehea_error("reg_interrupts failed. ret:%d", ret);
2268                 goto out_clean_pr;
2269         }
2270
2271         for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2272                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2273                 if (ret) {
2274                         ehea_error("activate_qp failed");
2275                         goto out_free_irqs;
2276                 }
2277         }
2278
2279         for(i = 0; i < port->num_def_qps; i++) {
2280                 ret = ehea_fill_port_res(&port->port_res[i]);
2281                 if (ret) {
2282                         ehea_error("out_free_irqs");
2283                         goto out_free_irqs;
2284                 }
2285         }
2286
2287         ret = 0;
2288         port->state = EHEA_PORT_UP;
2289         goto out;
2290
2291 out_free_irqs:
2292         ehea_free_interrupts(dev);
2293
2294 out_clean_pr:
2295         ehea_clean_all_portres(port);
2296 out:
2297         if (ret)
2298                 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2299
2300         return ret;
2301 }
2302
2303 static void port_napi_disable(struct ehea_port *port)
2304 {
2305         int i;
2306
2307         for (i = 0; i < port->num_def_qps; i++)
2308                 napi_disable(&port->port_res[i].napi);
2309 }
2310
2311 static void port_napi_enable(struct ehea_port *port)
2312 {
2313         int i;
2314
2315         for (i = 0; i < port->num_def_qps; i++)
2316                 napi_enable(&port->port_res[i].napi);
2317 }
2318
2319 static int ehea_open(struct net_device *dev)
2320 {
2321         int ret;
2322         struct ehea_port *port = netdev_priv(dev);
2323
2324         down(&port->port_lock);
2325
2326         if (netif_msg_ifup(port))
2327                 ehea_info("enabling port %s", dev->name);
2328
2329         ret = ehea_up(dev);
2330         if (!ret) {
2331                 port_napi_enable(port);
2332                 netif_start_queue(dev);
2333         }
2334
2335         up(&port->port_lock);
2336
2337         return ret;
2338 }
2339
2340 static int ehea_down(struct net_device *dev)
2341 {
2342         int ret;
2343         struct ehea_port *port = netdev_priv(dev);
2344
2345         if (port->state == EHEA_PORT_DOWN)
2346                 return 0;
2347
2348         ehea_drop_multicast_list(dev);
2349         ehea_free_interrupts(dev);
2350
2351         port_napi_disable(port);
2352
2353         port->state = EHEA_PORT_DOWN;
2354
2355         ret = ehea_clean_all_portres(port);
2356         if (ret)
2357                 ehea_info("Failed freeing resources for %s. ret=%i",
2358                           dev->name, ret);
2359
2360         return ret;
2361 }
2362
2363 static int ehea_stop(struct net_device *dev)
2364 {
2365         int ret;
2366         struct ehea_port *port = netdev_priv(dev);
2367
2368         if (netif_msg_ifdown(port))
2369                 ehea_info("disabling port %s", dev->name);
2370
2371         flush_workqueue(port->adapter->ehea_wq);
2372         down(&port->port_lock);
2373         netif_stop_queue(dev);
2374         ret = ehea_down(dev);
2375         up(&port->port_lock);
2376         return ret;
2377 }
2378
2379 static void ehea_reset_port(struct work_struct *work)
2380 {
2381         int ret;
2382         struct ehea_port *port =
2383                 container_of(work, struct ehea_port, reset_task);
2384         struct net_device *dev = port->netdev;
2385
2386         port->resets++;
2387         down(&port->port_lock);
2388         netif_stop_queue(dev);
2389
2390         port_napi_disable(port);
2391
2392         ehea_down(dev);
2393
2394         ret = ehea_up(dev);
2395         if (ret)
2396                 goto out;
2397
2398         if (netif_msg_timer(port))
2399                 ehea_info("Device %s resetted successfully", dev->name);
2400
2401         port_napi_enable(port);
2402
2403         netif_wake_queue(dev);
2404 out:
2405         up(&port->port_lock);
2406         return;
2407 }
2408
2409 static void ehea_rereg_mrs(struct work_struct *work)
2410 {
2411         int ret, i;
2412         struct ehea_adapter *adapter;
2413
2414         ehea_info("LPAR memory enlarged - re-initializing driver");
2415
2416         list_for_each_entry(adapter, &adapter_list, list)
2417                 if (adapter->active_ports) {
2418                         /* Shutdown all ports */
2419                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2420                                 struct ehea_port *port = adapter->port[i];
2421
2422                                 if (port) {
2423                                         struct net_device *dev = port->netdev;
2424
2425                                         if (dev->flags & IFF_UP) {
2426                                                 ehea_info("stopping %s",
2427                                                           dev->name);
2428                                                 down(&port->port_lock);
2429                                                 netif_stop_queue(dev);
2430
2431                                                 port_napi_disable(port);
2432
2433                                                 ehea_down(dev);
2434                                                 up(&port->port_lock);
2435                                         }
2436                                 }
2437                         }
2438
2439                         /* Unregister old memory region */
2440                         ret = ehea_rem_mr(&adapter->mr);
2441                         if (ret) {
2442                                 ehea_error("unregister MR failed - driver"
2443                                            " inoperable!");
2444                                 goto out;
2445                         }
2446                 }
2447
2448         ehea_destroy_busmap();
2449
2450         ret = ehea_create_busmap();
2451         if (ret)
2452                 goto out;
2453
2454         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2455
2456         list_for_each_entry(adapter, &adapter_list, list)
2457                 if (adapter->active_ports) {
2458                         /* Register new memory region */
2459                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2460                         if (ret) {
2461                                 ehea_error("register MR failed - driver"
2462                                            " inoperable!");
2463                                 goto out;
2464                         }
2465
2466                         /* Restart all ports */
2467                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2468                                 struct ehea_port *port = adapter->port[i];
2469
2470                                 if (port) {
2471                                         struct net_device *dev = port->netdev;
2472
2473                                         if (dev->flags & IFF_UP) {
2474                                                 ehea_info("restarting %s",
2475                                                           dev->name);
2476                                                 down(&port->port_lock);
2477
2478                                                 ret = ehea_up(dev);
2479                                                 if (!ret) {
2480                                                         port_napi_enable(port);
2481                                                         netif_wake_queue(dev);
2482                                                 }
2483
2484                                                 up(&port->port_lock);
2485                                         }
2486                                 }
2487                         }
2488                 }
2489 out:
2490         return;
2491 }
2492
2493 static void ehea_tx_watchdog(struct net_device *dev)
2494 {
2495         struct ehea_port *port = netdev_priv(dev);
2496
2497         if (netif_carrier_ok(dev))
2498                 queue_work(port->adapter->ehea_wq, &port->reset_task);
2499 }
2500
2501 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2502 {
2503         struct hcp_query_ehea *cb;
2504         u64 hret;
2505         int ret;
2506
2507         cb = kzalloc(PAGE_SIZE, GFP_KERNEL);
2508         if (!cb) {
2509                 ret = -ENOMEM;
2510                 goto out;
2511         }
2512
2513         hret = ehea_h_query_ehea(adapter->handle, cb);
2514
2515         if (hret != H_SUCCESS) {
2516                 ret = -EIO;
2517                 goto out_herr;
2518         }
2519
2520         adapter->max_mc_mac = cb->max_mc_mac - 1;
2521         ret = 0;
2522
2523 out_herr:
2524         kfree(cb);
2525 out:
2526         return ret;
2527 }
2528
2529 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2530 {
2531         struct hcp_ehea_port_cb4 *cb4;
2532         u64 hret;
2533         int ret = 0;
2534
2535         *jumbo = 0;
2536
2537         /* (Try to) enable *jumbo frames */
2538         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2539         if (!cb4) {
2540                 ehea_error("no mem for cb4");
2541                 ret = -ENOMEM;
2542                 goto out;
2543         } else {
2544                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2545                                               port->logical_port_id,
2546                                               H_PORT_CB4,
2547                                               H_PORT_CB4_JUMBO, cb4);
2548                 if (hret == H_SUCCESS) {
2549                         if (cb4->jumbo_frame)
2550                                 *jumbo = 1;
2551                         else {
2552                                 cb4->jumbo_frame = 1;
2553                                 hret = ehea_h_modify_ehea_port(port->adapter->
2554                                                                handle,
2555                                                                port->
2556                                                                logical_port_id,
2557                                                                H_PORT_CB4,
2558                                                                H_PORT_CB4_JUMBO,
2559                                                                cb4);
2560                                 if (hret == H_SUCCESS)
2561                                         *jumbo = 1;
2562                         }
2563                 } else
2564                         ret = -EINVAL;
2565
2566                 kfree(cb4);
2567         }
2568 out:
2569         return ret;
2570 }
2571
2572 static ssize_t ehea_show_port_id(struct device *dev,
2573                                  struct device_attribute *attr, char *buf)
2574 {
2575         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2576         return sprintf(buf, "%d", port->logical_port_id);
2577 }
2578
2579 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2580                    NULL);
2581
2582 static void __devinit logical_port_release(struct device *dev)
2583 {
2584         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2585         of_node_put(port->ofdev.node);
2586 }
2587
2588 static int ehea_driver_sysfs_add(struct device *dev,
2589                                  struct device_driver *driver)
2590 {
2591         int ret;
2592
2593         ret = sysfs_create_link(&driver->kobj, &dev->kobj,
2594                                 kobject_name(&dev->kobj));
2595         if (ret == 0) {
2596                 ret = sysfs_create_link(&dev->kobj, &driver->kobj,
2597                                         "driver");
2598                 if (ret)
2599                         sysfs_remove_link(&driver->kobj,
2600                                           kobject_name(&dev->kobj));
2601         }
2602         return ret;
2603 }
2604
2605 static void ehea_driver_sysfs_remove(struct device *dev,
2606                                      struct device_driver *driver)
2607 {
2608         struct device_driver *drv = driver;
2609
2610         if (drv) {
2611                 sysfs_remove_link(&drv->kobj, kobject_name(&dev->kobj));
2612                 sysfs_remove_link(&dev->kobj, "driver");
2613         }
2614 }
2615
2616 static struct device *ehea_register_port(struct ehea_port *port,
2617                                          struct device_node *dn)
2618 {
2619         int ret;
2620
2621         port->ofdev.node = of_node_get(dn);
2622         port->ofdev.dev.parent = &port->adapter->ebus_dev->ofdev.dev;
2623         port->ofdev.dev.bus = &ibmebus_bus_type;
2624
2625         sprintf(port->ofdev.dev.bus_id, "port%d", port_name_cnt++);
2626         port->ofdev.dev.release = logical_port_release;
2627
2628         ret = of_device_register(&port->ofdev);
2629         if (ret) {
2630                 ehea_error("failed to register device. ret=%d", ret);
2631                 goto out;
2632         }
2633
2634         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2635         if (ret) {
2636                 ehea_error("failed to register attributes, ret=%d", ret);
2637                 goto out_unreg_of_dev;
2638         }
2639
2640         ret = ehea_driver_sysfs_add(&port->ofdev.dev, &ehea_driver.driver);
2641         if (ret) {
2642                 ehea_error("failed to register sysfs driver link");
2643                 goto out_rem_dev_file;
2644         }
2645
2646         return &port->ofdev.dev;
2647
2648 out_rem_dev_file:
2649         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2650 out_unreg_of_dev:
2651         of_device_unregister(&port->ofdev);
2652 out:
2653         return NULL;
2654 }
2655
2656 static void ehea_unregister_port(struct ehea_port *port)
2657 {
2658         ehea_driver_sysfs_remove(&port->ofdev.dev, &ehea_driver.driver);
2659         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2660         of_device_unregister(&port->ofdev);
2661 }
2662
2663 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2664                                          u32 logical_port_id,
2665                                          struct device_node *dn)
2666 {
2667         int ret;
2668         struct net_device *dev;
2669         struct ehea_port *port;
2670         struct device *port_dev;
2671         int jumbo;
2672
2673         /* allocate memory for the port structures */
2674         dev = alloc_etherdev(sizeof(struct ehea_port));
2675
2676         if (!dev) {
2677                 ehea_error("no mem for net_device");
2678                 ret = -ENOMEM;
2679                 goto out_err;
2680         }
2681
2682         port = netdev_priv(dev);
2683
2684         sema_init(&port->port_lock, 1);
2685         port->state = EHEA_PORT_DOWN;
2686         port->sig_comp_iv = sq_entries / 10;
2687
2688         port->adapter = adapter;
2689         port->netdev = dev;
2690         port->logical_port_id = logical_port_id;
2691
2692         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2693
2694         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2695         if (!port->mc_list) {
2696                 ret = -ENOMEM;
2697                 goto out_free_ethdev;
2698         }
2699
2700         INIT_LIST_HEAD(&port->mc_list->list);
2701
2702         ret = ehea_sense_port_attr(port);
2703         if (ret)
2704                 goto out_free_mc_list;
2705
2706         port_dev = ehea_register_port(port, dn);
2707         if (!port_dev)
2708                 goto out_free_mc_list;
2709
2710         SET_NETDEV_DEV(dev, port_dev);
2711
2712         /* initialize net_device structure */
2713         SET_MODULE_OWNER(dev);
2714
2715         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
2716
2717         dev->open = ehea_open;
2718 #ifdef CONFIG_NET_POLL_CONTROLLER
2719         dev->poll_controller = ehea_netpoll;
2720 #endif
2721         dev->stop = ehea_stop;
2722         dev->hard_start_xmit = ehea_start_xmit;
2723         dev->get_stats = ehea_get_stats;
2724         dev->set_multicast_list = ehea_set_multicast_list;
2725         dev->set_mac_address = ehea_set_mac_addr;
2726         dev->change_mtu = ehea_change_mtu;
2727         dev->vlan_rx_register = ehea_vlan_rx_register;
2728         dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid;
2729         dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid;
2730         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
2731                       | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX
2732                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
2733                       | NETIF_F_LLTX;
2734         dev->tx_timeout = &ehea_tx_watchdog;
2735         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
2736
2737         INIT_WORK(&port->reset_task, ehea_reset_port);
2738
2739         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2740         if (ret) {
2741                 ret = -EIO;
2742                 goto out_unreg_port;
2743         }
2744
2745         ehea_set_ethtool_ops(dev);
2746
2747         ret = register_netdev(dev);
2748         if (ret) {
2749                 ehea_error("register_netdev failed. ret=%d", ret);
2750                 goto out_dereg_bc;
2751         }
2752
2753         port->lro_max_aggr = lro_max_aggr;
2754
2755         ret = ehea_get_jumboframe_status(port, &jumbo);
2756         if (ret)
2757                 ehea_error("failed determining jumbo frame status for %s",
2758                            port->netdev->name);
2759
2760         ehea_info("%s: Jumbo frames are %sabled", dev->name,
2761                   jumbo == 1 ? "en" : "dis");
2762
2763         adapter->active_ports++;
2764
2765         return port;
2766
2767 out_dereg_bc:
2768         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2769
2770 out_unreg_port:
2771         ehea_unregister_port(port);
2772
2773 out_free_mc_list:
2774         kfree(port->mc_list);
2775
2776 out_free_ethdev:
2777         free_netdev(dev);
2778
2779 out_err:
2780         ehea_error("setting up logical port with id=%d failed, ret=%d",
2781                    logical_port_id, ret);
2782         return NULL;
2783 }
2784
2785 static void ehea_shutdown_single_port(struct ehea_port *port)
2786 {
2787         unregister_netdev(port->netdev);
2788         ehea_unregister_port(port);
2789         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2790         kfree(port->mc_list);
2791         free_netdev(port->netdev);
2792         port->adapter->active_ports--;
2793 }
2794
2795 static int ehea_setup_ports(struct ehea_adapter *adapter)
2796 {
2797         struct device_node *lhea_dn;
2798         struct device_node *eth_dn = NULL;
2799
2800         const u32 *dn_log_port_id;
2801         int i = 0;
2802
2803         lhea_dn = adapter->ebus_dev->ofdev.node;
2804         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
2805
2806                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
2807                                                  NULL);
2808                 if (!dn_log_port_id) {
2809                         ehea_error("bad device node: eth_dn name=%s",
2810                                    eth_dn->full_name);
2811                         continue;
2812                 }
2813
2814                 if (ehea_add_adapter_mr(adapter)) {
2815                         ehea_error("creating MR failed");
2816                         of_node_put(eth_dn);
2817                         return -EIO;
2818                 }
2819
2820                 adapter->port[i] = ehea_setup_single_port(adapter,
2821                                                           *dn_log_port_id,
2822                                                           eth_dn);
2823                 if (adapter->port[i])
2824                         ehea_info("%s -> logical port id #%d",
2825                                   adapter->port[i]->netdev->name,
2826                                   *dn_log_port_id);
2827                 else
2828                         ehea_remove_adapter_mr(adapter);
2829
2830                 i++;
2831         };
2832
2833         return 0;
2834 }
2835
2836 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
2837                                            u32 logical_port_id)
2838 {
2839         struct device_node *lhea_dn;
2840         struct device_node *eth_dn = NULL;
2841         const u32 *dn_log_port_id;
2842
2843         lhea_dn = adapter->ebus_dev->ofdev.node;
2844         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
2845
2846                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
2847                                                  NULL);
2848                 if (dn_log_port_id)
2849                         if (*dn_log_port_id == logical_port_id)
2850                                 return eth_dn;
2851         };
2852
2853         return NULL;
2854 }
2855
2856 static ssize_t ehea_probe_port(struct device *dev,
2857                                struct device_attribute *attr,
2858                                const char *buf, size_t count)
2859 {
2860         struct ehea_adapter *adapter = dev->driver_data;
2861         struct ehea_port *port;
2862         struct device_node *eth_dn = NULL;
2863         int i;
2864
2865         u32 logical_port_id;
2866
2867         sscanf(buf, "%d", &logical_port_id);
2868
2869         port = ehea_get_port(adapter, logical_port_id);
2870
2871         if (port) {
2872                 ehea_info("adding port with logical port id=%d failed. port "
2873                           "already configured as %s.", logical_port_id,
2874                           port->netdev->name);
2875                 return -EINVAL;
2876         }
2877
2878         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
2879
2880         if (!eth_dn) {
2881                 ehea_info("no logical port with id %d found", logical_port_id);
2882                 return -EINVAL;
2883         }
2884
2885         if (ehea_add_adapter_mr(adapter)) {
2886                 ehea_error("creating MR failed");
2887                 return -EIO;
2888         }
2889
2890         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
2891
2892         of_node_put(eth_dn);
2893
2894         if (port) {
2895                 for (i=0; i < EHEA_MAX_PORTS; i++)
2896                         if (!adapter->port[i]) {
2897                                 adapter->port[i] = port;
2898                                 break;
2899                         }
2900
2901                 ehea_info("added %s (logical port id=%d)", port->netdev->name,
2902                           logical_port_id);
2903         } else {
2904                 ehea_remove_adapter_mr(adapter);
2905                 return -EIO;
2906         }
2907
2908         return (ssize_t) count;
2909 }
2910
2911 static ssize_t ehea_remove_port(struct device *dev,
2912                                 struct device_attribute *attr,
2913                                 const char *buf, size_t count)
2914 {
2915         struct ehea_adapter *adapter = dev->driver_data;
2916         struct ehea_port *port;
2917         int i;
2918         u32 logical_port_id;
2919
2920         sscanf(buf, "%d", &logical_port_id);
2921
2922         port = ehea_get_port(adapter, logical_port_id);
2923
2924         if (port) {
2925                 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
2926                           logical_port_id);
2927
2928                 ehea_shutdown_single_port(port);
2929
2930                 for (i=0; i < EHEA_MAX_PORTS; i++)
2931                         if (adapter->port[i] == port) {
2932                                 adapter->port[i] = NULL;
2933                                 break;
2934                         }
2935         } else {
2936                 ehea_error("removing port with logical port id=%d failed. port "
2937                            "not configured.", logical_port_id);
2938                 return -EINVAL;
2939         }
2940
2941         ehea_remove_adapter_mr(adapter);
2942
2943         return (ssize_t) count;
2944 }
2945
2946 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
2947 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
2948
2949 int ehea_create_device_sysfs(struct ibmebus_dev *dev)
2950 {
2951         int ret = device_create_file(&dev->ofdev.dev, &dev_attr_probe_port);
2952         if (ret)
2953                 goto out;
2954
2955         ret = device_create_file(&dev->ofdev.dev, &dev_attr_remove_port);
2956 out:
2957         return ret;
2958 }
2959
2960 void ehea_remove_device_sysfs(struct ibmebus_dev *dev)
2961 {
2962         device_remove_file(&dev->ofdev.dev, &dev_attr_probe_port);
2963         device_remove_file(&dev->ofdev.dev, &dev_attr_remove_port);
2964 }
2965
2966 static int __devinit ehea_probe_adapter(struct ibmebus_dev *dev,
2967                                         const struct of_device_id *id)
2968 {
2969         struct ehea_adapter *adapter;
2970         const u64 *adapter_handle;
2971         int ret;
2972
2973         if (!dev || !dev->ofdev.node) {
2974                 ehea_error("Invalid ibmebus device probed");
2975                 return -EINVAL;
2976         }
2977
2978         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
2979         if (!adapter) {
2980                 ret = -ENOMEM;
2981                 dev_err(&dev->ofdev.dev, "no mem for ehea_adapter\n");
2982                 goto out;
2983         }
2984
2985         list_add(&adapter->list, &adapter_list);
2986
2987         adapter->ebus_dev = dev;
2988
2989         adapter_handle = of_get_property(dev->ofdev.node, "ibm,hea-handle",
2990                                          NULL);
2991         if (adapter_handle)
2992                 adapter->handle = *adapter_handle;
2993
2994         if (!adapter->handle) {
2995                 dev_err(&dev->ofdev.dev, "failed getting handle for adapter"
2996                         " '%s'\n", dev->ofdev.node->full_name);
2997                 ret = -ENODEV;
2998                 goto out_free_ad;
2999         }
3000
3001         adapter->pd = EHEA_PD_ID;
3002
3003         dev->ofdev.dev.driver_data = adapter;
3004
3005
3006         /* initialize adapter and ports */
3007         /* get adapter properties */
3008         ret = ehea_sense_adapter_attr(adapter);
3009         if (ret) {
3010                 dev_err(&dev->ofdev.dev, "sense_adapter_attr failed: %d", ret);
3011                 goto out_free_ad;
3012         }
3013
3014         adapter->neq = ehea_create_eq(adapter,
3015                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3016         if (!adapter->neq) {
3017                 ret = -EIO;
3018                 dev_err(&dev->ofdev.dev, "NEQ creation failed");
3019                 goto out_free_ad;
3020         }
3021
3022         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3023                      (unsigned long)adapter);
3024
3025         ret = ibmebus_request_irq(NULL, adapter->neq->attr.ist1,
3026                                   ehea_interrupt_neq, IRQF_DISABLED,
3027                                   "ehea_neq", adapter);
3028         if (ret) {
3029                 dev_err(&dev->ofdev.dev, "requesting NEQ IRQ failed");
3030                 goto out_kill_eq;
3031         }
3032
3033         adapter->ehea_wq = create_workqueue("ehea_wq");
3034         if (!adapter->ehea_wq) {
3035                 ret = -EIO;
3036                 goto out_free_irq;
3037         }
3038
3039         ret = ehea_create_device_sysfs(dev);
3040         if (ret)
3041                 goto out_kill_wq;
3042
3043         ret = ehea_setup_ports(adapter);
3044         if (ret) {
3045                 dev_err(&dev->ofdev.dev, "setup_ports failed");
3046                 goto out_rem_dev_sysfs;
3047         }
3048
3049         ret = 0;
3050         goto out;
3051
3052 out_rem_dev_sysfs:
3053         ehea_remove_device_sysfs(dev);
3054
3055 out_kill_wq:
3056         destroy_workqueue(adapter->ehea_wq);
3057
3058 out_free_irq:
3059         ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter);
3060
3061 out_kill_eq:
3062         ehea_destroy_eq(adapter->neq);
3063
3064 out_free_ad:
3065         kfree(adapter);
3066 out:
3067         return ret;
3068 }
3069
3070 static int __devexit ehea_remove(struct ibmebus_dev *dev)
3071 {
3072         struct ehea_adapter *adapter = dev->ofdev.dev.driver_data;
3073         int i;
3074
3075         for (i = 0; i < EHEA_MAX_PORTS; i++)
3076                 if (adapter->port[i]) {
3077                         ehea_shutdown_single_port(adapter->port[i]);
3078                         adapter->port[i] = NULL;
3079                 }
3080
3081         ehea_remove_device_sysfs(dev);
3082
3083         destroy_workqueue(adapter->ehea_wq);
3084
3085         ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter);
3086         tasklet_kill(&adapter->neq_tasklet);
3087
3088         ehea_destroy_eq(adapter->neq);
3089         ehea_remove_adapter_mr(adapter);
3090         list_del(&adapter->list);
3091
3092         kfree(adapter);
3093
3094         return 0;
3095 }
3096
3097 static int check_module_parm(void)
3098 {
3099         int ret = 0;
3100
3101         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3102             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3103                 ehea_info("Bad parameter: rq1_entries");
3104                 ret = -EINVAL;
3105         }
3106         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3107             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3108                 ehea_info("Bad parameter: rq2_entries");
3109                 ret = -EINVAL;
3110         }
3111         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3112             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3113                 ehea_info("Bad parameter: rq3_entries");
3114                 ret = -EINVAL;
3115         }
3116         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3117             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3118                 ehea_info("Bad parameter: sq_entries");
3119                 ret = -EINVAL;
3120         }
3121
3122         return ret;
3123 }
3124
3125 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3126                                       char *buf)
3127 {
3128         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3129 }
3130
3131 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3132                    ehea_show_capabilities, NULL);
3133
3134 int __init ehea_module_init(void)
3135 {
3136         int ret;
3137
3138         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3139                DRV_VERSION);
3140
3141         ehea_driver_wq = create_workqueue("ehea_driver_wq");
3142
3143         INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3144
3145         ret = check_module_parm();
3146         if (ret)
3147                 goto out;
3148
3149         ret = ehea_create_busmap();
3150         if (ret)
3151                 goto out;
3152
3153         ret = ibmebus_register_driver(&ehea_driver);
3154         if (ret) {
3155                 ehea_error("failed registering eHEA device driver on ebus");
3156                 goto out;
3157         }
3158
3159         ret = driver_create_file(&ehea_driver.driver,
3160                                  &driver_attr_capabilities);
3161         if (ret) {
3162                 ehea_error("failed to register capabilities attribute, ret=%d",
3163                            ret);
3164                 ibmebus_unregister_driver(&ehea_driver);
3165                 goto out;
3166         }
3167
3168 out:
3169         return ret;
3170 }
3171
3172 static void __exit ehea_module_exit(void)
3173 {
3174         destroy_workqueue(ehea_driver_wq);
3175         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3176         ibmebus_unregister_driver(&ehea_driver);
3177         ehea_destroy_busmap();
3178 }
3179
3180 module_init(ehea_module_init);
3181 module_exit(ehea_module_exit);