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   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include <linux/in.h>
  30 #include <linux/ip.h>
  31 #include <linux/tcp.h>
  32 #include <linux/udp.h>
  33 #include <linux/if.h>
  34 #include <linux/list.h>
  35 #include <linux/if_ether.h>
  36 #include <linux/notifier.h>
  37 #include <linux/reboot.h>
  38
  39 #include <net/ip.h>
  40
  41 #include "ehea.h"
  42 #include "ehea_qmr.h"
  43 #include "ehea_phyp.h"
  44
  45
  46 MODULE_LICENSE("GPL");
  47 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  48 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  49 MODULE_VERSION(DRV_VERSION);
  50
  51
  52 static int msg_level = -1;
  53 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  54 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  55 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  56 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  57 static int use_mcs = 0;
  58 static int use_lro = 0;
  59 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  60 static int num_tx_qps = EHEA_NUM_TX_QP;
  61 static int prop_carrier_state = 0;
  62
  63 module_param(msg_level, int, 0);
  64 module_param(rq1_entries, int, 0);
  65 module_param(rq2_entries, int, 0);
  66 module_param(rq3_entries, int, 0);
  67 module_param(sq_entries, int, 0);
  68 module_param(prop_carrier_state, int, 0);
  69 module_param(use_mcs, int, 0);
  70 module_param(use_lro, int, 0);
  71 module_param(lro_max_aggr, int, 0);
  72 module_param(num_tx_qps, int, 0);
  73
  74 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
  75 MODULE_PARM_DESC(msg_level, "msg_level");
  76 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  77                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  78 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  79                  "[2^x - 1], x = [6..14]. Default = "
  80                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  81 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  82                  "[2^x - 1], x = [6..14]. Default = "
  83                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  84 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  85                  "[2^x - 1], x = [6..14]. Default = "
  86                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  87 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  88                  "[2^x - 1], x = [6..14]. Default = "
  89                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  90 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
  91
  92 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
  93                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
  94 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
  95                  "Default = 0");
  96
  97 static int port_name_cnt = 0;
  98 static LIST_HEAD(adapter_list);
  99 u64 ehea_driver_flags = 0;
 100 struct work_struct ehea_rereg_mr_task;
 101
 102 struct semaphore dlpar_mem_lock;
 103
 104 static int __devinit ehea_probe_adapter(struct of_device *dev,
 105                                         const struct of_device_id *id);
 106
 107 static int __devexit ehea_remove(struct of_device *dev);
 108
 109 static struct of_device_id ehea_device_table[] = {
 110         {
 111                 .name = "lhea",
 112                 .compatible = "IBM,lhea",
 113         },
 114         {},
 115 };
 116
 117 static struct of_platform_driver ehea_driver = {
 118         .name = "ehea",
 119         .match_table = ehea_device_table,
 120         .probe = ehea_probe_adapter,
 121         .remove = ehea_remove,
 122 };
 123
 124 void ehea_dump(void *adr, int len, char *msg) {
 125         int x;
 126         unsigned char *deb = adr;
 127         for (x = 0; x < len; x += 16) {
 128                 printk(DRV_NAME " %s adr=%p ofs=%04x %016lx %016lx\n", msg,
 129                           deb, x, *((u64*)&deb[0]), *((u64*)&deb[8]));
 130                 deb += 16;
 131         }
 132 }
 133
 134 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 135 {
 136         struct ehea_port *port = netdev_priv(dev);
 137         struct net_device_stats *stats = &port->stats;
 138         struct hcp_ehea_port_cb2 *cb2;
 139         u64 hret, rx_packets, tx_packets;
 140         int i;
 141
 142         memset(stats, 0, sizeof(*stats));
 143
 144         cb2 = kzalloc(PAGE_SIZE, GFP_KERNEL);
 145         if (!cb2) {
 146                 ehea_error("no mem for cb2");
 147                 goto out;
 148         }
 149
 150         hret = ehea_h_query_ehea_port(port->adapter->handle,
 151                                       port->logical_port_id,
 152                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 153         if (hret != H_SUCCESS) {
 154                 ehea_error("query_ehea_port failed");
 155                 goto out_herr;
 156         }
 157
 158         if (netif_msg_hw(port))
 159                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 160
 161         rx_packets = 0;
 162         for (i = 0; i < port->num_def_qps; i++)
 163                 rx_packets += port->port_res[i].rx_packets;
 164
 165         tx_packets = 0;
 166         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
 167                 tx_packets += port->port_res[i].tx_packets;
 168
 169         stats->tx_packets = tx_packets;
 170         stats->multicast = cb2->rxmcp;
 171         stats->rx_errors = cb2->rxuerr;
 172         stats->rx_bytes = cb2->rxo;
 173         stats->tx_bytes = cb2->txo;
 174         stats->rx_packets = rx_packets;
 175
 176 out_herr:
 177         kfree(cb2);
 178 out:
 179         return stats;
 180 }
 181
 182 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 183 {
 184         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 185         struct net_device *dev = pr->port->netdev;
 186         int max_index_mask = pr->rq1_skba.len - 1;
 187         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 188         int adder = 0;
 189         int i;
 190
 191         pr->rq1_skba.os_skbs = 0;
 192
 193         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 194                 pr->rq1_skba.index = index;
 195                 pr->rq1_skba.os_skbs = fill_wqes;
 196                 return;
 197         }
 198
 199         for (i = 0; i < fill_wqes; i++) {
 200                 if (!skb_arr_rq1[index]) {
 201                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 202                                                               EHEA_L_PKT_SIZE);
 203                         if (!skb_arr_rq1[index]) {
 204                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 205                                 ehea_error("%s: no mem for skb/%d wqes filled",
 206                                            dev->name, i);
 207                                 break;
 208                         }
 209                 }
 210                 index--;
 211                 index &= max_index_mask;
 212                 adder++;
 213         }
 214
 215         if (adder == 0)
 216                 return;
 217
 218         /* Ring doorbell */
 219         ehea_update_rq1a(pr->qp, adder);
 220 }
 221
 222 static int ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 223 {
 224         int ret = 0;
 225         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 226         struct net_device *dev = pr->port->netdev;
 227         int i;
 228
 229         for (i = 0; i < pr->rq1_skba.len; i++) {
 230                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 231                 if (!skb_arr_rq1[i]) {
 232                         ehea_error("%s: no mem for skb/%d wqes filled",
 233                                    dev->name, i);
 234                         ret = -ENOMEM;
 235                         goto out;
 236                 }
 237         }
 238         /* Ring doorbell */
 239         ehea_update_rq1a(pr->qp, nr_rq1a);
 240 out:
 241         return ret;
 242 }
 243
 244 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 245                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 246                               int num_wqes, int wqe_type, int packet_size)
 247 {
 248         struct net_device *dev = pr->port->netdev;
 249         struct ehea_qp *qp = pr->qp;
 250         struct sk_buff **skb_arr = q_skba->arr;
 251         struct ehea_rwqe *rwqe;
 252         int i, index, max_index_mask, fill_wqes;
 253         int adder = 0;
 254         int ret = 0;
 255
 256         fill_wqes = q_skba->os_skbs + num_wqes;
 257         q_skba->os_skbs = 0;
 258
 259         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 260                 q_skba->os_skbs = fill_wqes;
 261                 return ret;
 262         }
 263
 264         index = q_skba->index;
 265         max_index_mask = q_skba->len - 1;
 266         for (i = 0; i < fill_wqes; i++) {
 267                 u64 tmp_addr;
 268                 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
 269                 if (!skb) {
 270                         ehea_error("%s: no mem for skb/%d wqes filled",
 271                                    pr->port->netdev->name, i);
 272                         q_skba->os_skbs = fill_wqes - i;
 273                         ret = -ENOMEM;
 274                         break;
 275                 }
 276                 skb_reserve(skb, NET_IP_ALIGN);
 277
 278                 skb_arr[index] = skb;
 279                 tmp_addr = ehea_map_vaddr(skb->data);
 280                 if (tmp_addr == -1) {
 281                         dev_kfree_skb(skb);
 282                         q_skba->os_skbs = fill_wqes - i;
 283                         ret = 0;
 284                         break;
 285                 }
 286
 287                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 288                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 289                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 290                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 291                 rwqe->sg_list[0].vaddr = tmp_addr;
 292                 rwqe->sg_list[0].len = packet_size;
 293                 rwqe->data_segments = 1;
 294
 295                 index++;
 296                 index &= max_index_mask;
 297                 adder++;
 298         }
 299
 300         q_skba->index = index;
 301         if (adder == 0)
 302                 goto out;
 303
 304         /* Ring doorbell */
 305         iosync();
 306         if (rq_nr == 2)
 307                 ehea_update_rq2a(pr->qp, adder);
 308         else
 309                 ehea_update_rq3a(pr->qp, adder);
 310 out:
 311         return ret;
 312 }
 313
 314
 315 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 316 {
 317         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 318                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 319                                   EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
 320 }
 321
 322
 323 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 324 {
 325         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 326                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 327                                   EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
 328 }
 329
 330 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 331 {
 332         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 333         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 334                 return 0;
 335         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 336             (cqe->header_length == 0))
 337                 return 0;
 338         return -EINVAL;
 339 }
 340
 341 static inline void ehea_fill_skb(struct net_device *dev,
 342                                  struct sk_buff *skb, struct ehea_cqe *cqe)
 343 {
 344         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 345
 346         skb_put(skb, length);
 347         skb->ip_summed = CHECKSUM_UNNECESSARY;
 348         skb->protocol = eth_type_trans(skb, dev);
 349 }
 350
 351 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 352                                                int arr_len,
 353                                                struct ehea_cqe *cqe)
 354 {
 355         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 356         struct sk_buff *skb;
 357         void *pref;
 358         int x;
 359
 360         x = skb_index + 1;
 361         x &= (arr_len - 1);
 362
 363         pref = skb_array[x];
 364         prefetchw(pref);
 365         prefetchw(pref + EHEA_CACHE_LINE);
 366
 367         pref = (skb_array[x]->data);
 368         prefetch(pref);
 369         prefetch(pref + EHEA_CACHE_LINE);
 370         prefetch(pref + EHEA_CACHE_LINE * 2);
 371         prefetch(pref + EHEA_CACHE_LINE * 3);
 372         skb = skb_array[skb_index];
 373         skb_array[skb_index] = NULL;
 374         return skb;
 375 }
 376
 377 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 378                                                   int arr_len, int wqe_index)
 379 {
 380         struct sk_buff *skb;
 381         void *pref;
 382         int x;
 383
 384         x = wqe_index + 1;
 385         x &= (arr_len - 1);
 386
 387         pref = skb_array[x];
 388         prefetchw(pref);
 389         prefetchw(pref + EHEA_CACHE_LINE);
 390
 391         pref = (skb_array[x]->data);
 392         prefetchw(pref);
 393         prefetchw(pref + EHEA_CACHE_LINE);
 394
 395         skb = skb_array[wqe_index];
 396         skb_array[wqe_index] = NULL;
 397         return skb;
 398 }
 399
 400 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 401                                  struct ehea_cqe *cqe, int *processed_rq2,
 402                                  int *processed_rq3)
 403 {
 404         struct sk_buff *skb;
 405
 406         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 407                 pr->p_stats.err_tcp_cksum++;
 408         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 409                 pr->p_stats.err_ip_cksum++;
 410         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 411                 pr->p_stats.err_frame_crc++;
 412
 413         if (rq == 2) {
 414                 *processed_rq2 += 1;
 415                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 416                 dev_kfree_skb(skb);
 417         } else if (rq == 3) {
 418                 *processed_rq3 += 1;
 419                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 420                 dev_kfree_skb(skb);
 421         }
 422
 423         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 424                 if (netif_msg_rx_err(pr->port)) {
 425                         ehea_error("Critical receive error for QP %d. "
 426                                    "Resetting port.", pr->qp->init_attr.qp_nr);
 427                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 428                 }
 429                 schedule_work(&pr->port->reset_task);
 430                 return 1;
 431         }
 432
 433         return 0;
 434 }
 435
 436 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 437                        void **tcph, u64 *hdr_flags, void *priv)
 438 {
 439         struct ehea_cqe *cqe = priv;
 440         unsigned int ip_len;
 441         struct iphdr *iph;
 442
 443         /* non tcp/udp packets */
 444         if (!cqe->header_length)
 445                 return -1;
 446
 447         /* non tcp packet */
 448         skb_reset_network_header(skb);
 449         iph = ip_hdr(skb);
 450         if (iph->protocol != IPPROTO_TCP)
 451                 return -1;
 452
 453         ip_len = ip_hdrlen(skb);
 454         skb_set_transport_header(skb, ip_len);
 455         *tcph = tcp_hdr(skb);
 456
 457         /* check if ip header and tcp header are complete */
 458         if (iph->tot_len < ip_len + tcp_hdrlen(skb))
 459                 return -1;
 460
 461         *hdr_flags = LRO_IPV4 | LRO_TCP;
 462         *iphdr = iph;
 463
 464         return 0;
 465 }
 466
 467 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 468                           struct sk_buff *skb)
 469 {
 470         int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 471                 && pr->port->vgrp;
 472
 473         if (use_lro) {
 474                 if (vlan_extracted)
 475                         lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
 476                                                      pr->port->vgrp,
 477                                                      cqe->vlan_tag,
 478                                                      cqe);
 479                 else
 480                         lro_receive_skb(&pr->lro_mgr, skb, cqe);
 481         } else {
 482                 if (vlan_extracted)
 483                         vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
 484                                                  cqe->vlan_tag);
 485                 else
 486                         netif_receive_skb(skb);
 487         }
 488 }
 489
 490 static int ehea_proc_rwqes(struct net_device *dev,
 491                            struct ehea_port_res *pr,
 492                            int budget)
 493 {
 494         struct ehea_port *port = pr->port;
 495         struct ehea_qp *qp = pr->qp;
 496         struct ehea_cqe *cqe;
 497         struct sk_buff *skb;
 498         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 499         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 500         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 501         int skb_arr_rq1_len = pr->rq1_skba.len;
 502         int skb_arr_rq2_len = pr->rq2_skba.len;
 503         int skb_arr_rq3_len = pr->rq3_skba.len;
 504         int processed, processed_rq1, processed_rq2, processed_rq3;
 505         int wqe_index, last_wqe_index, rq, port_reset;
 506
 507         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 508         last_wqe_index = 0;
 509
 510         cqe = ehea_poll_rq1(qp, &wqe_index);
 511         while ((processed < budget) && cqe) {
 512                 ehea_inc_rq1(qp);
 513                 processed_rq1++;
 514                 processed++;
 515                 if (netif_msg_rx_status(port))
 516                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 517
 518                 last_wqe_index = wqe_index;
 519                 rmb();
 520                 if (!ehea_check_cqe(cqe, &rq)) {
 521                         if (rq == 1) {  /* LL RQ1 */
 522                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 523                                                           skb_arr_rq1_len,
 524                                                           wqe_index);
 525                                 if (unlikely(!skb)) {
 526                                         if (netif_msg_rx_err(port))
 527                                                 ehea_error("LL rq1: skb=NULL");
 528
 529                                         skb = netdev_alloc_skb(dev,
 530                                                                EHEA_L_PKT_SIZE);
 531                                         if (!skb)
 532                                                 break;
 533                                 }
 534                                 skb_copy_to_linear_data(skb, ((char*)cqe) + 64,
 535                                                  cqe->num_bytes_transfered - 4);
 536                                 ehea_fill_skb(dev, skb, cqe);
 537                         } else if (rq == 2) {  /* RQ2 */
 538                                 skb = get_skb_by_index(skb_arr_rq2,
 539                                                        skb_arr_rq2_len, cqe);
 540                                 if (unlikely(!skb)) {
 541                                         if (netif_msg_rx_err(port))
 542                                                 ehea_error("rq2: skb=NULL");
 543                                         break;
 544                                 }
 545                                 ehea_fill_skb(dev, skb, cqe);
 546                                 processed_rq2++;
 547                         } else {  /* RQ3 */
 548                                 skb = get_skb_by_index(skb_arr_rq3,
 549                                                        skb_arr_rq3_len, cqe);
 550                                 if (unlikely(!skb)) {
 551                                         if (netif_msg_rx_err(port))
 552                                                 ehea_error("rq3: skb=NULL");
 553                                         break;
 554                                 }
 555                                 ehea_fill_skb(dev, skb, cqe);
 556                                 processed_rq3++;
 557                         }
 558
 559                         ehea_proc_skb(pr, cqe, skb);
 560                         dev->last_rx = jiffies;
 561                 } else {
 562                         pr->p_stats.poll_receive_errors++;
 563                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 564                                                            &processed_rq2,
 565                                                            &processed_rq3);
 566                         if (port_reset)
 567                                 break;
 568                 }
 569                 cqe = ehea_poll_rq1(qp, &wqe_index);
 570         }
 571         if (use_lro)
 572                 lro_flush_all(&pr->lro_mgr);
 573
 574         pr->rx_packets += processed;
 575
 576         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 577         ehea_refill_rq2(pr, processed_rq2);
 578         ehea_refill_rq3(pr, processed_rq3);
 579
 580         return processed;
 581 }
 582
 583 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 584 {
 585         struct sk_buff *skb;
 586         struct ehea_cq *send_cq = pr->send_cq;
 587         struct ehea_cqe *cqe;
 588         int quota = my_quota;
 589         int cqe_counter = 0;
 590         int swqe_av = 0;
 591         int index;
 592         unsigned long flags;
 593
 594         cqe = ehea_poll_cq(send_cq);
 595         while(cqe && (quota > 0)) {
 596                 ehea_inc_cq(send_cq);
 597
 598                 cqe_counter++;
 599                 rmb();
 600                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 601                         ehea_error("Send Completion Error: Resetting port");
 602                         if (netif_msg_tx_err(pr->port))
 603                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 604                         schedule_work(&pr->port->reset_task);
 605                         break;
 606                 }
 607
 608                 if (netif_msg_tx_done(pr->port))
 609                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 610
 611                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 612                            == EHEA_SWQE2_TYPE)) {
 613
 614                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 615                         skb = pr->sq_skba.arr[index];
 616                         dev_kfree_skb(skb);
 617                         pr->sq_skba.arr[index] = NULL;
 618                 }
 619
 620                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 621                 quota--;
 622
 623                 cqe = ehea_poll_cq(send_cq);
 624         };
 625
 626         ehea_update_feca(send_cq, cqe_counter);
 627         atomic_add(swqe_av, &pr->swqe_avail);
 628
 629         spin_lock_irqsave(&pr->netif_queue, flags);
 630
 631         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 632                                   >= pr->swqe_refill_th)) {
 633                 netif_wake_queue(pr->port->netdev);
 634                 pr->queue_stopped = 0;
 635         }
 636         spin_unlock_irqrestore(&pr->netif_queue, flags);
 637
 638         return cqe;
 639 }
 640
 641 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 642 #define EHEA_POLL_MAX_CQES 65535
 643
 644 static int ehea_poll(struct napi_struct *napi, int budget)
 645 {
 646         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, napi);
 647         struct net_device *dev = pr->port->netdev;
 648         struct ehea_cqe *cqe;
 649         struct ehea_cqe *cqe_skb = NULL;
 650         int force_irq, wqe_index;
 651         int rx = 0;
 652
 653         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 654         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 655
 656         if (!force_irq)
 657                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 658
 659         while ((rx != budget) || force_irq) {
 660                 pr->poll_counter = 0;
 661                 force_irq = 0;
 662                 netif_rx_complete(dev, napi);
 663                 ehea_reset_cq_ep(pr->recv_cq);
 664                 ehea_reset_cq_ep(pr->send_cq);
 665                 ehea_reset_cq_n1(pr->recv_cq);
 666                 ehea_reset_cq_n1(pr->send_cq);
 667                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 668                 cqe_skb = ehea_poll_cq(pr->send_cq);
 669
 670                 if (!cqe && !cqe_skb)
 671                         return rx;
 672
 673                 if (!netif_rx_reschedule(dev, napi))
 674                         return rx;
 675
 676                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 677                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 678         }
 679
 680         pr->poll_counter++;
 681         return rx;
 682 }
 683
 684 #ifdef CONFIG_NET_POLL_CONTROLLER
 685 static void ehea_netpoll(struct net_device *dev)
 686 {
 687         struct ehea_port *port = netdev_priv(dev);
 688         int i;
 689
 690         for (i = 0; i < port->num_def_qps; i++)
 691                 netif_rx_schedule(dev, &port->port_res[i].napi);
 692 }
 693 #endif
 694
 695 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 696 {
 697         struct ehea_port_res *pr = param;
 698
 699         netif_rx_schedule(pr->port->netdev, &pr->napi);
 700
 701         return IRQ_HANDLED;
 702 }
 703
 704 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 705 {
 706         struct ehea_port *port = param;
 707         struct ehea_eqe *eqe;
 708         struct ehea_qp *qp;
 709         u32 qp_token;
 710
 711         eqe = ehea_poll_eq(port->qp_eq);
 712
 713         while (eqe) {
 714                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 715                 ehea_error("QP aff_err: entry=0x%lx, token=0x%x",
 716                            eqe->entry, qp_token);
 717
 718                 qp = port->port_res[qp_token].qp;
 719                 ehea_error_data(port->adapter, qp->fw_handle);
 720                 eqe = ehea_poll_eq(port->qp_eq);
 721         }
 722
 723         schedule_work(&port->reset_task);
 724
 725         return IRQ_HANDLED;
 726 }
 727
 728 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 729                                        int logical_port)
 730 {
 731         int i;
 732
 733         for (i = 0; i < EHEA_MAX_PORTS; i++)
 734                 if (adapter->port[i])
 735                         if (adapter->port[i]->logical_port_id == logical_port)
 736                                 return adapter->port[i];
 737         return NULL;
 738 }
 739
 740 int ehea_sense_port_attr(struct ehea_port *port)
 741 {
 742         int ret;
 743         u64 hret;
 744         struct hcp_ehea_port_cb0 *cb0;
 745
 746         cb0 = kzalloc(PAGE_SIZE, GFP_ATOMIC);   /* May be called via */
 747         if (!cb0) {                             /* ehea_neq_tasklet() */
 748                 ehea_error("no mem for cb0");
 749                 ret = -ENOMEM;
 750                 goto out;
 751         }
 752
 753         hret = ehea_h_query_ehea_port(port->adapter->handle,
 754                                       port->logical_port_id, H_PORT_CB0,
 755                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 756                                       cb0);
 757         if (hret != H_SUCCESS) {
 758                 ret = -EIO;
 759                 goto out_free;
 760         }
 761
 762         /* MAC address */
 763         port->mac_addr = cb0->port_mac_addr << 16;
 764
 765         if (!is_valid_ether_addr((u8*)&port->mac_addr)) {
 766                 ret = -EADDRNOTAVAIL;
 767                 goto out_free;
 768         }
 769
 770         /* Port speed */
 771         switch (cb0->port_speed) {
 772         case H_SPEED_10M_H:
 773                 port->port_speed = EHEA_SPEED_10M;
 774                 port->full_duplex = 0;
 775                 break;
 776         case H_SPEED_10M_F:
 777                 port->port_speed = EHEA_SPEED_10M;
 778                 port->full_duplex = 1;
 779                 break;
 780         case H_SPEED_100M_H:
 781                 port->port_speed = EHEA_SPEED_100M;
 782                 port->full_duplex = 0;
 783                 break;
 784         case H_SPEED_100M_F:
 785                 port->port_speed = EHEA_SPEED_100M;
 786                 port->full_duplex = 1;
 787                 break;
 788         case H_SPEED_1G_F:
 789                 port->port_speed = EHEA_SPEED_1G;
 790                 port->full_duplex = 1;
 791                 break;
 792         case H_SPEED_10G_F:
 793                 port->port_speed = EHEA_SPEED_10G;
 794                 port->full_duplex = 1;
 795                 break;
 796         default:
 797                 port->port_speed = 0;
 798                 port->full_duplex = 0;
 799                 break;
 800         }
 801
 802         port->autoneg = 1;
 803         port->num_mcs = cb0->num_default_qps;
 804
 805         /* Number of default QPs */
 806         if (use_mcs)
 807                 port->num_def_qps = cb0->num_default_qps;
 808         else
 809                 port->num_def_qps = 1;
 810
 811         if (!port->num_def_qps) {
 812                 ret = -EINVAL;
 813                 goto out_free;
 814         }
 815
 816         port->num_tx_qps = num_tx_qps;
 817
 818         if (port->num_def_qps >= port->num_tx_qps)
 819                 port->num_add_tx_qps = 0;
 820         else
 821                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
 822
 823         ret = 0;
 824 out_free:
 825         if (ret || netif_msg_probe(port))
 826                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
 827         kfree(cb0);
 828 out:
 829         return ret;
 830 }
 831
 832 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
 833 {
 834         struct hcp_ehea_port_cb4 *cb4;
 835         u64 hret;
 836         int ret = 0;
 837
 838         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
 839         if (!cb4) {
 840                 ehea_error("no mem for cb4");
 841                 ret = -ENOMEM;
 842                 goto out;
 843         }
 844
 845         cb4->port_speed = port_speed;
 846
 847         netif_carrier_off(port->netdev);
 848
 849         hret = ehea_h_modify_ehea_port(port->adapter->handle,
 850                                        port->logical_port_id,
 851                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
 852         if (hret == H_SUCCESS) {
 853                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
 854
 855                 hret = ehea_h_query_ehea_port(port->adapter->handle,
 856                                               port->logical_port_id,
 857                                               H_PORT_CB4, H_PORT_CB4_SPEED,
 858                                               cb4);
 859                 if (hret == H_SUCCESS) {
 860                         switch (cb4->port_speed) {
 861                         case H_SPEED_10M_H:
 862                                 port->port_speed = EHEA_SPEED_10M;
 863                                 port->full_duplex = 0;
 864                                 break;
 865                         case H_SPEED_10M_F:
 866                                 port->port_speed = EHEA_SPEED_10M;
 867                                 port->full_duplex = 1;
 868                                 break;
 869                         case H_SPEED_100M_H:
 870                                 port->port_speed = EHEA_SPEED_100M;
 871                                 port->full_duplex = 0;
 872                                 break;
 873                         case H_SPEED_100M_F:
 874                                 port->port_speed = EHEA_SPEED_100M;
 875                                 port->full_duplex = 1;
 876                                 break;
 877                         case H_SPEED_1G_F:
 878                                 port->port_speed = EHEA_SPEED_1G;
 879                                 port->full_duplex = 1;
 880                                 break;
 881                         case H_SPEED_10G_F:
 882                                 port->port_speed = EHEA_SPEED_10G;
 883                                 port->full_duplex = 1;
 884                                 break;
 885                         default:
 886                                 port->port_speed = 0;
 887                                 port->full_duplex = 0;
 888                                 break;
 889                         }
 890                 } else {
 891                         ehea_error("Failed sensing port speed");
 892                         ret = -EIO;
 893                 }
 894         } else {
 895                 if (hret == H_AUTHORITY) {
 896                         ehea_info("Hypervisor denied setting port speed");
 897                         ret = -EPERM;
 898                 } else {
 899                         ret = -EIO;
 900                         ehea_error("Failed setting port speed");
 901                 }
 902         }
 903         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
 904                 netif_carrier_on(port->netdev);
 905
 906         kfree(cb4);
 907 out:
 908         return ret;
 909 }
 910
 911 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
 912 {
 913         int ret;
 914         u8 ec;
 915         u8 portnum;
 916         struct ehea_port *port;
 917
 918         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
 919         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
 920         port = ehea_get_port(adapter, portnum);
 921
 922         switch (ec) {
 923         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
 924
 925                 if (!port) {
 926                         ehea_error("unknown portnum %x", portnum);
 927                         break;
 928                 }
 929
 930                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
 931                         if (!netif_carrier_ok(port->netdev)) {
 932                                 ret = ehea_sense_port_attr(port);
 933                                 if (ret) {
 934                                         ehea_error("failed resensing port "
 935                                                    "attributes");
 936                                         break;
 937                                 }
 938
 939                                 if (netif_msg_link(port))
 940                                         ehea_info("%s: Logical port up: %dMbps "
 941                                                   "%s Duplex",
 942                                                   port->netdev->name,
 943                                                   port->port_speed,
 944                                                   port->full_duplex ==
 945                                                   1 ? "Full" : "Half");
 946
 947                                 netif_carrier_on(port->netdev);
 948                                 netif_wake_queue(port->netdev);
 949                         }
 950                 } else
 951                         if (netif_carrier_ok(port->netdev)) {
 952                                 if (netif_msg_link(port))
 953                                         ehea_info("%s: Logical port down",
 954                                                   port->netdev->name);
 955                                 netif_carrier_off(port->netdev);
 956                                 netif_stop_queue(port->netdev);
 957                         }
 958
 959                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
 960                         port->phy_link = EHEA_PHY_LINK_UP;
 961                         if (netif_msg_link(port))
 962                                 ehea_info("%s: Physical port up",
 963                                           port->netdev->name);
 964                         if (prop_carrier_state)
 965                                 netif_carrier_on(port->netdev);
 966                 } else {
 967                         port->phy_link = EHEA_PHY_LINK_DOWN;
 968                         if (netif_msg_link(port))
 969                                 ehea_info("%s: Physical port down",
 970                                           port->netdev->name);
 971                         if (prop_carrier_state)
 972                                 netif_carrier_off(port->netdev);
 973                 }
 974
 975                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
 976                         ehea_info("External switch port is primary port");
 977                 else
 978                         ehea_info("External switch port is backup port");
 979
 980                 break;
 981         case EHEA_EC_ADAPTER_MALFUNC:
 982                 ehea_error("Adapter malfunction");
 983                 break;
 984         case EHEA_EC_PORT_MALFUNC:
 985                 ehea_info("Port malfunction: Device: %s", port->netdev->name);
 986                 netif_carrier_off(port->netdev);
 987                 netif_stop_queue(port->netdev);
 988                 break;
 989         default:
 990                 ehea_error("unknown event code %x, eqe=0x%lX", ec, eqe);
 991                 break;
 992         }
 993 }
 994
 995 static void ehea_neq_tasklet(unsigned long data)
 996 {
 997         struct ehea_adapter *adapter = (struct ehea_adapter*)data;
 998         struct ehea_eqe *eqe;
 999         u64 event_mask;
1000
1001         eqe = ehea_poll_eq(adapter->neq);
1002         ehea_debug("eqe=%p", eqe);
1003
1004         while (eqe) {
1005                 ehea_debug("*eqe=%lx", eqe->entry);
1006                 ehea_parse_eqe(adapter, eqe->entry);
1007                 eqe = ehea_poll_eq(adapter->neq);
1008                 ehea_debug("next eqe=%p", eqe);
1009         }
1010
1011         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1012                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1013                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1014
1015         ehea_h_reset_events(adapter->handle,
1016                             adapter->neq->fw_handle, event_mask);
1017 }
1018
1019 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1020 {
1021         struct ehea_adapter *adapter = param;
1022         tasklet_hi_schedule(&adapter->neq_tasklet);
1023         return IRQ_HANDLED;
1024 }
1025
1026
1027 static int ehea_fill_port_res(struct ehea_port_res *pr)
1028 {
1029         int ret;
1030         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1031
1032         ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1033                                      - init_attr->act_nr_rwqes_rq2
1034                                      - init_attr->act_nr_rwqes_rq3 - 1);
1035
1036         ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1037
1038         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1039
1040         return ret;
1041 }
1042
1043 static int ehea_reg_interrupts(struct net_device *dev)
1044 {
1045         struct ehea_port *port = netdev_priv(dev);
1046         struct ehea_port_res *pr;
1047         int i, ret;
1048
1049
1050         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1051                  dev->name);
1052
1053         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1054                                   ehea_qp_aff_irq_handler,
1055                                   IRQF_DISABLED, port->int_aff_name, port);
1056         if (ret) {
1057                 ehea_error("failed registering irq for qp_aff_irq_handler:"
1058                            "ist=%X", port->qp_eq->attr.ist1);
1059                 goto out_free_qpeq;
1060         }
1061
1062         if (netif_msg_ifup(port))
1063                 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1064                           "registered", port->qp_eq->attr.ist1);
1065
1066
1067         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1068                 pr = &port->port_res[i];
1069                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1070                          "%s-queue%d", dev->name, i);
1071                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1072                                           ehea_recv_irq_handler,
1073                                           IRQF_DISABLED, pr->int_send_name,
1074                                           pr);
1075                 if (ret) {
1076                         ehea_error("failed registering irq for ehea_queue "
1077                                    "port_res_nr:%d, ist=%X", i,
1078                                    pr->eq->attr.ist1);
1079                         goto out_free_req;
1080                 }
1081                 if (netif_msg_ifup(port))
1082                         ehea_info("irq_handle 0x%X for function ehea_queue_int "
1083                                   "%d registered", pr->eq->attr.ist1, i);
1084         }
1085 out:
1086         return ret;
1087
1088
1089 out_free_req:
1090         while (--i >= 0) {
1091                 u32 ist = port->port_res[i].eq->attr.ist1;
1092                 ibmebus_free_irq(ist, &port->port_res[i]);
1093         }
1094
1095 out_free_qpeq:
1096         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1097         i = port->num_def_qps;
1098
1099         goto out;
1100
1101 }
1102
1103 static void ehea_free_interrupts(struct net_device *dev)
1104 {
1105         struct ehea_port *port = netdev_priv(dev);
1106         struct ehea_port_res *pr;
1107         int i;
1108
1109         /* send */
1110
1111         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1112                 pr = &port->port_res[i];
1113                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1114                 if (netif_msg_intr(port))
1115                         ehea_info("free send irq for res %d with handle 0x%X",
1116                                   i, pr->eq->attr.ist1);
1117         }
1118
1119         /* associated events */
1120         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1121         if (netif_msg_intr(port))
1122                 ehea_info("associated event interrupt for handle 0x%X freed",
1123                           port->qp_eq->attr.ist1);
1124 }
1125
1126 static int ehea_configure_port(struct ehea_port *port)
1127 {
1128         int ret, i;
1129         u64 hret, mask;
1130         struct hcp_ehea_port_cb0 *cb0;
1131
1132         ret = -ENOMEM;
1133         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1134         if (!cb0)
1135                 goto out;
1136
1137         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1138                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1139                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1140                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1141                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1142                                       PXLY_RC_VLAN_FILTER)
1143                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1144
1145         for (i = 0; i < port->num_mcs; i++)
1146                 if (use_mcs)
1147                         cb0->default_qpn_arr[i] =
1148                                 port->port_res[i].qp->init_attr.qp_nr;
1149                 else
1150                         cb0->default_qpn_arr[i] =
1151                                 port->port_res[0].qp->init_attr.qp_nr;
1152
1153         if (netif_msg_ifup(port))
1154                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1155
1156         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1157              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1158
1159         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1160                                        port->logical_port_id,
1161                                        H_PORT_CB0, mask, cb0);
1162         ret = -EIO;
1163         if (hret != H_SUCCESS)
1164                 goto out_free;
1165
1166         ret = 0;
1167
1168 out_free:
1169         kfree(cb0);
1170 out:
1171         return ret;
1172 }
1173
1174 int ehea_gen_smrs(struct ehea_port_res *pr)
1175 {
1176         int ret;
1177         struct ehea_adapter *adapter = pr->port->adapter;
1178
1179         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1180         if (ret)
1181                 goto out;
1182
1183         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1184         if (ret)
1185                 goto out_free;
1186
1187         return 0;
1188
1189 out_free:
1190         ehea_rem_mr(&pr->send_mr);
1191 out:
1192         ehea_error("Generating SMRS failed\n");
1193         return -EIO;
1194 }
1195
1196 int ehea_rem_smrs(struct ehea_port_res *pr)
1197 {
1198         if ((ehea_rem_mr(&pr->send_mr))
1199             || (ehea_rem_mr(&pr->recv_mr)))
1200                 return -EIO;
1201         else
1202                 return 0;
1203 }
1204
1205 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1206 {
1207         int arr_size = sizeof(void*) * max_q_entries;
1208
1209         q_skba->arr = vmalloc(arr_size);
1210         if (!q_skba->arr)
1211                 return -ENOMEM;
1212
1213         memset(q_skba->arr, 0, arr_size);
1214
1215         q_skba->len = max_q_entries;
1216         q_skba->index = 0;
1217         q_skba->os_skbs = 0;
1218
1219         return 0;
1220 }
1221
1222 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1223                               struct port_res_cfg *pr_cfg, int queue_token)
1224 {
1225         struct ehea_adapter *adapter = port->adapter;
1226         enum ehea_eq_type eq_type = EHEA_EQ;
1227         struct ehea_qp_init_attr *init_attr = NULL;
1228         int ret = -EIO;
1229
1230         memset(pr, 0, sizeof(struct ehea_port_res));
1231
1232         pr->port = port;
1233         spin_lock_init(&pr->xmit_lock);
1234         spin_lock_init(&pr->netif_queue);
1235
1236         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1237         if (!pr->eq) {
1238                 ehea_error("create_eq failed (eq)");
1239                 goto out_free;
1240         }
1241
1242         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1243                                      pr->eq->fw_handle,
1244                                      port->logical_port_id);
1245         if (!pr->recv_cq) {
1246                 ehea_error("create_cq failed (cq_recv)");
1247                 goto out_free;
1248         }
1249
1250         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1251                                      pr->eq->fw_handle,
1252                                      port->logical_port_id);
1253         if (!pr->send_cq) {
1254                 ehea_error("create_cq failed (cq_send)");
1255                 goto out_free;
1256         }
1257
1258         if (netif_msg_ifup(port))
1259                 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1260                           pr->send_cq->attr.act_nr_of_cqes,
1261                           pr->recv_cq->attr.act_nr_of_cqes);
1262
1263         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1264         if (!init_attr) {
1265                 ret = -ENOMEM;
1266                 ehea_error("no mem for ehea_qp_init_attr");
1267                 goto out_free;
1268         }
1269
1270         init_attr->low_lat_rq1 = 1;
1271         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1272         init_attr->rq_count = 3;
1273         init_attr->qp_token = queue_token;
1274         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1275         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1276         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1277         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1278         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1279         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1280         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1281         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1282         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1283         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1284         init_attr->port_nr = port->logical_port_id;
1285         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1286         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1287         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1288
1289         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1290         if (!pr->qp) {
1291                 ehea_error("create_qp failed");
1292                 ret = -EIO;
1293                 goto out_free;
1294         }
1295
1296         if (netif_msg_ifup(port))
1297                 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1298                           "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1299                           init_attr->act_nr_send_wqes,
1300                           init_attr->act_nr_rwqes_rq1,
1301                           init_attr->act_nr_rwqes_rq2,
1302                           init_attr->act_nr_rwqes_rq3);
1303
1304         ret = ehea_init_q_skba(&pr->sq_skba, init_attr->act_nr_send_wqes + 1);
1305         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1306         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1307         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1308         if (ret)
1309                 goto out_free;
1310
1311         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1312         if (ehea_gen_smrs(pr) != 0) {
1313                 ret = -EIO;
1314                 goto out_free;
1315         }
1316
1317         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1318
1319         kfree(init_attr);
1320
1321         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1322
1323         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1324         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1325         pr->lro_mgr.lro_arr = pr->lro_desc;
1326         pr->lro_mgr.get_skb_header = get_skb_hdr;
1327         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1328         pr->lro_mgr.dev = port->netdev;
1329         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1330         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1331
1332         ret = 0;
1333         goto out;
1334
1335 out_free:
1336         kfree(init_attr);
1337         vfree(pr->sq_skba.arr);
1338         vfree(pr->rq1_skba.arr);
1339         vfree(pr->rq2_skba.arr);
1340         vfree(pr->rq3_skba.arr);
1341         ehea_destroy_qp(pr->qp);
1342         ehea_destroy_cq(pr->send_cq);
1343         ehea_destroy_cq(pr->recv_cq);
1344         ehea_destroy_eq(pr->eq);
1345 out:
1346         return ret;
1347 }
1348
1349 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1350 {
1351         int ret, i;
1352
1353         ret = ehea_destroy_qp(pr->qp);
1354
1355         if (!ret) {
1356                 ehea_destroy_cq(pr->send_cq);
1357                 ehea_destroy_cq(pr->recv_cq);
1358                 ehea_destroy_eq(pr->eq);
1359
1360                 for (i = 0; i < pr->rq1_skba.len; i++)
1361                         if (pr->rq1_skba.arr[i])
1362                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1363
1364                 for (i = 0; i < pr->rq2_skba.len; i++)
1365                         if (pr->rq2_skba.arr[i])
1366                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1367
1368                 for (i = 0; i < pr->rq3_skba.len; i++)
1369                         if (pr->rq3_skba.arr[i])
1370                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1371
1372                 for (i = 0; i < pr->sq_skba.len; i++)
1373                         if (pr->sq_skba.arr[i])
1374                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1375
1376                 vfree(pr->rq1_skba.arr);
1377                 vfree(pr->rq2_skba.arr);
1378                 vfree(pr->rq3_skba.arr);
1379                 vfree(pr->sq_skba.arr);
1380                 ret = ehea_rem_smrs(pr);
1381         }
1382         return ret;
1383 }
1384
1385 /*
1386  * The write_* functions store information in swqe which is used by
1387  * the hardware to calculate the ip/tcp/udp checksum
1388  */
1389
1390 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1391                                       const struct sk_buff *skb)
1392 {
1393         swqe->ip_start = skb_network_offset(skb);
1394         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1395 }
1396
1397 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1398                                         const struct sk_buff *skb)
1399 {
1400         swqe->tcp_offset =
1401                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1402
1403         swqe->tcp_end = (u16)skb->len - 1;
1404 }
1405
1406 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1407                                         const struct sk_buff *skb)
1408 {
1409         swqe->tcp_offset =
1410                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1411
1412         swqe->tcp_end = (u16)skb->len - 1;
1413 }
1414
1415
1416 static void write_swqe2_TSO(struct sk_buff *skb,
1417                             struct ehea_swqe *swqe, u32 lkey)
1418 {
1419         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1420         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1421         int skb_data_size = skb->len - skb->data_len;
1422         int headersize;
1423
1424         /* Packet is TCP with TSO enabled */
1425         swqe->tx_control |= EHEA_SWQE_TSO;
1426         swqe->mss = skb_shinfo(skb)->gso_size;
1427         /* copy only eth/ip/tcp headers to immediate data and
1428          * the rest of skb->data to sg1entry
1429          */
1430         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1431
1432         skb_data_size = skb->len - skb->data_len;
1433
1434         if (skb_data_size >= headersize) {
1435                 /* copy immediate data */
1436                 skb_copy_from_linear_data(skb, imm_data, headersize);
1437                 swqe->immediate_data_length = headersize;
1438
1439                 if (skb_data_size > headersize) {
1440                         /* set sg1entry data */
1441                         sg1entry->l_key = lkey;
1442                         sg1entry->len = skb_data_size - headersize;
1443                         sg1entry->vaddr =
1444                                 ehea_map_vaddr(skb->data + headersize);
1445                         swqe->descriptors++;
1446                 }
1447         } else
1448                 ehea_error("cannot handle fragmented headers");
1449 }
1450
1451 static void write_swqe2_nonTSO(struct sk_buff *skb,
1452                                struct ehea_swqe *swqe, u32 lkey)
1453 {
1454         int skb_data_size = skb->len - skb->data_len;
1455         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1456         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1457
1458         /* Packet is any nonTSO type
1459          *
1460          * Copy as much as possible skb->data to immediate data and
1461          * the rest to sg1entry
1462          */
1463         if (skb_data_size >= SWQE2_MAX_IMM) {
1464                 /* copy immediate data */
1465                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1466
1467                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1468
1469                 if (skb_data_size > SWQE2_MAX_IMM) {
1470                         /* copy sg1entry data */
1471                         sg1entry->l_key = lkey;
1472                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1473                         sg1entry->vaddr =
1474                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1475                         swqe->descriptors++;
1476                 }
1477         } else {
1478                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1479                 swqe->immediate_data_length = skb_data_size;
1480         }
1481 }
1482
1483 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1484                                     struct ehea_swqe *swqe, u32 lkey)
1485 {
1486         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1487         skb_frag_t *frag;
1488         int nfrags, sg1entry_contains_frag_data, i;
1489
1490         nfrags = skb_shinfo(skb)->nr_frags;
1491         sg1entry = &swqe->u.immdata_desc.sg_entry;
1492         sg_list = (struct ehea_vsgentry*)&swqe->u.immdata_desc.sg_list;
1493         swqe->descriptors = 0;
1494         sg1entry_contains_frag_data = 0;
1495
1496         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1497                 write_swqe2_TSO(skb, swqe, lkey);
1498         else
1499                 write_swqe2_nonTSO(skb, swqe, lkey);
1500
1501         /* write descriptors */
1502         if (nfrags > 0) {
1503                 if (swqe->descriptors == 0) {
1504                         /* sg1entry not yet used */
1505                         frag = &skb_shinfo(skb)->frags[0];
1506
1507                         /* copy sg1entry data */
1508                         sg1entry->l_key = lkey;
1509                         sg1entry->len = frag->size;
1510                         sg1entry->vaddr =
1511                                 ehea_map_vaddr(page_address(frag->page)
1512                                                + frag->page_offset);
1513                         swqe->descriptors++;
1514                         sg1entry_contains_frag_data = 1;
1515                 }
1516
1517                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1518
1519                         frag = &skb_shinfo(skb)->frags[i];
1520                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1521
1522                         sgentry->l_key = lkey;
1523                         sgentry->len = frag->size;
1524                         sgentry->vaddr =
1525                                 ehea_map_vaddr(page_address(frag->page)
1526                                                + frag->page_offset);
1527                         swqe->descriptors++;
1528                 }
1529         }
1530 }
1531
1532 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1533 {
1534         int ret = 0;
1535         u64 hret;
1536         u8 reg_type;
1537
1538         /* De/Register untagged packets */
1539         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1540         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1541                                      port->logical_port_id,
1542                                      reg_type, port->mac_addr, 0, hcallid);
1543         if (hret != H_SUCCESS) {
1544                 ehea_error("%sregistering bc address failed (tagged)",
1545                            hcallid == H_REG_BCMC ? "" : "de");
1546                 ret = -EIO;
1547                 goto out_herr;
1548         }
1549
1550         /* De/Register VLAN packets */
1551         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1552         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1553                                      port->logical_port_id,
1554                                      reg_type, port->mac_addr, 0, hcallid);
1555         if (hret != H_SUCCESS) {
1556                 ehea_error("%sregistering bc address failed (vlan)",
1557                            hcallid == H_REG_BCMC ? "" : "de");
1558                 ret = -EIO;
1559         }
1560 out_herr:
1561         return ret;
1562 }
1563
1564 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1565 {
1566         struct ehea_port *port = netdev_priv(dev);
1567         struct sockaddr *mac_addr = sa;
1568         struct hcp_ehea_port_cb0 *cb0;
1569         int ret;
1570         u64 hret;
1571
1572         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1573                 ret = -EADDRNOTAVAIL;
1574                 goto out;
1575         }
1576
1577         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1578         if (!cb0) {
1579                 ehea_error("no mem for cb0");
1580                 ret = -ENOMEM;
1581                 goto out;
1582         }
1583
1584         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1585
1586         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1587
1588         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1589                                        port->logical_port_id, H_PORT_CB0,
1590                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1591         if (hret != H_SUCCESS) {
1592                 ret = -EIO;
1593                 goto out_free;
1594         }
1595
1596         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1597
1598         /* Deregister old MAC in pHYP */
1599         ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1600         if (ret)
1601                 goto out_free;
1602
1603         port->mac_addr = cb0->port_mac_addr << 16;
1604
1605         /* Register new MAC in pHYP */
1606         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1607         if (ret)
1608                 goto out_free;
1609
1610         ret = 0;
1611 out_free:
1612         kfree(cb0);
1613 out:
1614         return ret;
1615 }
1616
1617 static void ehea_promiscuous_error(u64 hret, int enable)
1618 {
1619         if (hret == H_AUTHORITY)
1620                 ehea_info("Hypervisor denied %sabling promiscuous mode",
1621                           enable == 1 ? "en" : "dis");
1622         else
1623                 ehea_error("failed %sabling promiscuous mode",
1624                            enable == 1 ? "en" : "dis");
1625 }
1626
1627 static void ehea_promiscuous(struct net_device *dev, int enable)
1628 {
1629         struct ehea_port *port = netdev_priv(dev);
1630         struct hcp_ehea_port_cb7 *cb7;
1631         u64 hret;
1632
1633         if ((enable && port->promisc) || (!enable && !port->promisc))
1634                 return;
1635
1636         cb7 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
1637         if (!cb7) {
1638                 ehea_error("no mem for cb7");
1639                 goto out;
1640         }
1641
1642         /* Modify Pxs_DUCQPN in CB7 */
1643         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1644
1645         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1646                                        port->logical_port_id,
1647                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1648         if (hret) {
1649                 ehea_promiscuous_error(hret, enable);
1650                 goto out;
1651         }
1652
1653         port->promisc = enable;
1654 out:
1655         kfree(cb7);
1656         return;
1657 }
1658
1659 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1660                                      u32 hcallid)
1661 {
1662         u64 hret;
1663         u8 reg_type;
1664
1665         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1666                  | EHEA_BCMC_UNTAGGED;
1667
1668         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1669                                      port->logical_port_id,
1670                                      reg_type, mc_mac_addr, 0, hcallid);
1671         if (hret)
1672                 goto out;
1673
1674         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1675                  | EHEA_BCMC_VLANID_ALL;
1676
1677         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1678                                      port->logical_port_id,
1679                                      reg_type, mc_mac_addr, 0, hcallid);
1680 out:
1681         return hret;
1682 }
1683
1684 static int ehea_drop_multicast_list(struct net_device *dev)
1685 {
1686         struct ehea_port *port = netdev_priv(dev);
1687         struct ehea_mc_list *mc_entry = port->mc_list;
1688         struct list_head *pos;
1689         struct list_head *temp;
1690         int ret = 0;
1691         u64 hret;
1692
1693         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1694                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1695
1696                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1697                                                  H_DEREG_BCMC);
1698                 if (hret) {
1699                         ehea_error("failed deregistering mcast MAC");
1700                         ret = -EIO;
1701                 }
1702
1703                 list_del(pos);
1704                 kfree(mc_entry);
1705         }
1706         return ret;
1707 }
1708
1709 static void ehea_allmulti(struct net_device *dev, int enable)
1710 {
1711         struct ehea_port *port = netdev_priv(dev);
1712         u64 hret;
1713
1714         if (!port->allmulti) {
1715                 if (enable) {
1716                         /* Enable ALLMULTI */
1717                         ehea_drop_multicast_list(dev);
1718                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1719                         if (!hret)
1720                                 port->allmulti = 1;
1721                         else
1722                                 ehea_error("failed enabling IFF_ALLMULTI");
1723                 }
1724         } else
1725                 if (!enable) {
1726                         /* Disable ALLMULTI */
1727                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1728                         if (!hret)
1729                                 port->allmulti = 0;
1730                         else
1731                                 ehea_error("failed disabling IFF_ALLMULTI");
1732                 }
1733 }
1734
1735 static void ehea_add_multicast_entry(struct ehea_port* port, u8* mc_mac_addr)
1736 {
1737         struct ehea_mc_list *ehea_mcl_entry;
1738         u64 hret;
1739
1740         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1741         if (!ehea_mcl_entry) {
1742                 ehea_error("no mem for mcl_entry");
1743                 return;
1744         }
1745
1746         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1747
1748         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1749
1750         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1751                                          H_REG_BCMC);
1752         if (!hret)
1753                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1754         else {
1755                 ehea_error("failed registering mcast MAC");
1756                 kfree(ehea_mcl_entry);
1757         }
1758 }
1759
1760 static void ehea_set_multicast_list(struct net_device *dev)
1761 {
1762         struct ehea_port *port = netdev_priv(dev);
1763         struct dev_mc_list *k_mcl_entry;
1764         int ret, i;
1765
1766         if (dev->flags & IFF_PROMISC) {
1767                 ehea_promiscuous(dev, 1);
1768                 return;
1769         }
1770         ehea_promiscuous(dev, 0);
1771
1772         if (dev->flags & IFF_ALLMULTI) {
1773                 ehea_allmulti(dev, 1);
1774                 return;
1775         }
1776         ehea_allmulti(dev, 0);
1777
1778         if (dev->mc_count) {
1779                 ret = ehea_drop_multicast_list(dev);
1780                 if (ret) {
1781                         /* Dropping the current multicast list failed.
1782                          * Enabling ALL_MULTI is the best we can do.
1783                          */
1784                         ehea_allmulti(dev, 1);
1785                 }
1786
1787                 if (dev->mc_count > port->adapter->max_mc_mac) {
1788                         ehea_info("Mcast registration limit reached (0x%lx). "
1789                                   "Use ALLMULTI!",
1790                                   port->adapter->max_mc_mac);
1791                         goto out;
1792                 }
1793
1794                 for (i = 0, k_mcl_entry = dev->mc_list;
1795                      i < dev->mc_count;
1796                      i++, k_mcl_entry = k_mcl_entry->next) {
1797                         ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1798                 }
1799         }
1800 out:
1801         return;
1802 }
1803
1804 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1805 {
1806         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1807                 return -EINVAL;
1808         dev->mtu = new_mtu;
1809         return 0;
1810 }
1811
1812 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1813                        struct ehea_swqe *swqe, u32 lkey)
1814 {
1815         if (skb->protocol == htons(ETH_P_IP)) {
1816                 const struct iphdr *iph = ip_hdr(skb);
1817
1818                 /* IPv4 */
1819                 swqe->tx_control |= EHEA_SWQE_CRC
1820                                  | EHEA_SWQE_IP_CHECKSUM
1821                                  | EHEA_SWQE_TCP_CHECKSUM
1822                                  | EHEA_SWQE_IMM_DATA_PRESENT
1823                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
1824
1825                 write_ip_start_end(swqe, skb);
1826
1827                 if (iph->protocol == IPPROTO_UDP) {
1828                         if ((iph->frag_off & IP_MF)
1829                             || (iph->frag_off & IP_OFFSET))
1830                                 /* IP fragment, so don't change cs */
1831                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
1832                         else
1833                                 write_udp_offset_end(swqe, skb);
1834                 } else if (iph->protocol == IPPROTO_TCP) {
1835                         write_tcp_offset_end(swqe, skb);
1836                 }
1837
1838                 /* icmp (big data) and ip segmentation packets (all other ip
1839                    packets) do not require any special handling */
1840
1841         } else {
1842                 /* Other Ethernet Protocol */
1843                 swqe->tx_control |= EHEA_SWQE_CRC
1844                                  | EHEA_SWQE_IMM_DATA_PRESENT
1845                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
1846         }
1847
1848         write_swqe2_data(skb, dev, swqe, lkey);
1849 }
1850
1851 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
1852                        struct ehea_swqe *swqe)
1853 {
1854         int nfrags = skb_shinfo(skb)->nr_frags;
1855         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
1856         skb_frag_t *frag;
1857         int i;
1858
1859         if (skb->protocol == htons(ETH_P_IP)) {
1860                 const struct iphdr *iph = ip_hdr(skb);
1861
1862                 /* IPv4 */
1863                 write_ip_start_end(swqe, skb);
1864
1865                 if (iph->protocol == IPPROTO_TCP) {
1866                         swqe->tx_control |= EHEA_SWQE_CRC
1867                                          | EHEA_SWQE_IP_CHECKSUM
1868                                          | EHEA_SWQE_TCP_CHECKSUM
1869                                          | EHEA_SWQE_IMM_DATA_PRESENT;
1870
1871                         write_tcp_offset_end(swqe, skb);
1872
1873                 } else if (iph->protocol == IPPROTO_UDP) {
1874                         if ((iph->frag_off & IP_MF)
1875                             || (iph->frag_off & IP_OFFSET))
1876                                 /* IP fragment, so don't change cs */
1877                                 swqe->tx_control |= EHEA_SWQE_CRC
1878                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
1879                         else {
1880                                 swqe->tx_control |= EHEA_SWQE_CRC
1881                                                  | EHEA_SWQE_IP_CHECKSUM
1882                                                  | EHEA_SWQE_TCP_CHECKSUM
1883                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
1884
1885                                 write_udp_offset_end(swqe, skb);
1886                         }
1887                 } else {
1888                         /* icmp (big data) and
1889                            ip segmentation packets (all other ip packets) */
1890                         swqe->tx_control |= EHEA_SWQE_CRC
1891                                          | EHEA_SWQE_IP_CHECKSUM
1892                                          | EHEA_SWQE_IMM_DATA_PRESENT;
1893                 }
1894         } else {
1895                 /* Other Ethernet Protocol */
1896                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
1897         }
1898         /* copy (immediate) data */
1899         if (nfrags == 0) {
1900                 /* data is in a single piece */
1901                 skb_copy_from_linear_data(skb, imm_data, skb->len);
1902         } else {
1903                 /* first copy data from the skb->data buffer ... */
1904                 skb_copy_from_linear_data(skb, imm_data,
1905                                           skb->len - skb->data_len);
1906                 imm_data += skb->len - skb->data_len;
1907
1908                 /* ... then copy data from the fragments */
1909                 for (i = 0; i < nfrags; i++) {
1910                         frag = &skb_shinfo(skb)->frags[i];
1911                         memcpy(imm_data,
1912                                page_address(frag->page) + frag->page_offset,
1913                                frag->size);
1914                         imm_data += frag->size;
1915                 }
1916         }
1917         swqe->immediate_data_length = skb->len;
1918         dev_kfree_skb(skb);
1919 }
1920
1921 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
1922 {
1923         struct tcphdr *tcp;
1924         u32 tmp;
1925
1926         if ((skb->protocol == htons(ETH_P_IP)) &&
1927             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
1928                 tcp = (struct tcphdr*)(skb_network_header(skb) + (ip_hdr(skb)->ihl * 4));
1929                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
1930                 tmp += ip_hdr(skb)->daddr % 31;
1931                 return tmp % num_qps;
1932         }
1933         else
1934                 return 0;
1935 }
1936
1937 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
1938 {
1939         struct ehea_port *port = netdev_priv(dev);
1940         struct ehea_swqe *swqe;
1941         unsigned long flags;
1942         u32 lkey;
1943         int swqe_index;
1944         struct ehea_port_res *pr;
1945
1946         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
1947
1948         if (!spin_trylock(&pr->xmit_lock))
1949                 return NETDEV_TX_BUSY;
1950
1951         if (pr->queue_stopped) {
1952                 spin_unlock(&pr->xmit_lock);
1953                 return NETDEV_TX_BUSY;
1954         }
1955
1956         swqe = ehea_get_swqe(pr->qp, &swqe_index);
1957         memset(swqe, 0, SWQE_HEADER_SIZE);
1958         atomic_dec(&pr->swqe_avail);
1959
1960         if (skb->len <= SWQE3_MAX_IMM) {
1961                 u32 sig_iv = port->sig_comp_iv;
1962                 u32 swqe_num = pr->swqe_id_counter;
1963                 ehea_xmit3(skb, dev, swqe);
1964                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
1965                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
1966                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
1967                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
1968                                                       sig_iv);
1969                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1970                         pr->swqe_ll_count = 0;
1971                 } else
1972                         pr->swqe_ll_count += 1;
1973         } else {
1974                 swqe->wr_id =
1975                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
1976                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
1977                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
1978                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
1979                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
1980
1981                 pr->sq_skba.index++;
1982                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
1983
1984                 lkey = pr->send_mr.lkey;
1985                 ehea_xmit2(skb, dev, swqe, lkey);
1986                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1987         }
1988         pr->swqe_id_counter += 1;
1989
1990         if (port->vgrp && vlan_tx_tag_present(skb)) {
1991                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
1992                 swqe->vlan_tag = vlan_tx_tag_get(skb);
1993         }
1994
1995         if (netif_msg_tx_queued(port)) {
1996                 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
1997                 ehea_dump(swqe, 512, "swqe");
1998         }
1999
2000         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2001                 netif_stop_queue(dev);
2002                 swqe->tx_control |= EHEA_SWQE_PURGE;
2003         }
2004
2005         ehea_post_swqe(pr->qp, swqe);
2006         pr->tx_packets++;
2007
2008         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2009                 spin_lock_irqsave(&pr->netif_queue, flags);
2010                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2011                         pr->p_stats.queue_stopped++;
2012                         netif_stop_queue(dev);
2013                         pr->queue_stopped = 1;
2014                 }
2015                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2016         }
2017         dev->trans_start = jiffies;
2018         spin_unlock(&pr->xmit_lock);
2019
2020         return NETDEV_TX_OK;
2021 }
2022
2023 static void ehea_vlan_rx_register(struct net_device *dev,
2024                                   struct vlan_group *grp)
2025 {
2026         struct ehea_port *port = netdev_priv(dev);
2027         struct ehea_adapter *adapter = port->adapter;
2028         struct hcp_ehea_port_cb1 *cb1;
2029         u64 hret;
2030
2031         port->vgrp = grp;
2032
2033         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2034         if (!cb1) {
2035                 ehea_error("no mem for cb1");
2036                 goto out;
2037         }
2038
2039         memset(cb1->vlan_filter, 0, sizeof(cb1->vlan_filter));
2040
2041         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2042                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2043         if (hret != H_SUCCESS)
2044                 ehea_error("modify_ehea_port failed");
2045
2046         kfree(cb1);
2047 out:
2048         return;
2049 }
2050
2051 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2052 {
2053         struct ehea_port *port = netdev_priv(dev);
2054         struct ehea_adapter *adapter = port->adapter;
2055         struct hcp_ehea_port_cb1 *cb1;
2056         int index;
2057         u64 hret;
2058
2059         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2060         if (!cb1) {
2061                 ehea_error("no mem for cb1");
2062                 goto out;
2063         }
2064
2065         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2066                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2067         if (hret != H_SUCCESS) {
2068                 ehea_error("query_ehea_port failed");
2069                 goto out;
2070         }
2071
2072         index = (vid / 64);
2073         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2074
2075         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2076                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2077         if (hret != H_SUCCESS)
2078                 ehea_error("modify_ehea_port failed");
2079 out:
2080         kfree(cb1);
2081         return;
2082 }
2083
2084 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2085 {
2086         struct ehea_port *port = netdev_priv(dev);
2087         struct ehea_adapter *adapter = port->adapter;
2088         struct hcp_ehea_port_cb1 *cb1;
2089         int index;
2090         u64 hret;
2091
2092         vlan_group_set_device(port->vgrp, vid, NULL);
2093
2094         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2095         if (!cb1) {
2096                 ehea_error("no mem for cb1");
2097                 goto out;
2098         }
2099
2100         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2101                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2102         if (hret != H_SUCCESS) {
2103                 ehea_error("query_ehea_port failed");
2104                 goto out;
2105         }
2106
2107         index = (vid / 64);
2108         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2109
2110         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2111                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2112         if (hret != H_SUCCESS)
2113                 ehea_error("modify_ehea_port failed");
2114 out:
2115         kfree(cb1);
2116         return;
2117 }
2118
2119 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2120 {
2121         int ret = -EIO;
2122         u64 hret;
2123         u16 dummy16 = 0;
2124         u64 dummy64 = 0;
2125         struct hcp_modify_qp_cb0* cb0;
2126
2127         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2128         if (!cb0) {
2129                 ret = -ENOMEM;
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 (1)");
2137                 goto out;
2138         }
2139
2140         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
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 (1)");
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 (2)");
2153                 goto out;
2154         }
2155
2156         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2157         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2158                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2159                                      &dummy64, &dummy64, &dummy16, &dummy16);
2160         if (hret != H_SUCCESS) {
2161                 ehea_error("modify_ehea_qp failed (2)");
2162                 goto out;
2163         }
2164
2165         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2166                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2167         if (hret != H_SUCCESS) {
2168                 ehea_error("query_ehea_qp failed (3)");
2169                 goto out;
2170         }
2171
2172         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2173         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2174                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2175                                      &dummy64, &dummy64, &dummy16, &dummy16);
2176         if (hret != H_SUCCESS) {
2177                 ehea_error("modify_ehea_qp failed (3)");
2178                 goto out;
2179         }
2180
2181         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2182                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2183         if (hret != H_SUCCESS) {
2184                 ehea_error("query_ehea_qp failed (4)");
2185                 goto out;
2186         }
2187
2188         ret = 0;
2189 out:
2190         kfree(cb0);
2191         return ret;
2192 }
2193
2194 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2195                                int add_tx_qps)
2196 {
2197         int ret, i;
2198         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2199         enum ehea_eq_type eq_type = EHEA_EQ;
2200
2201         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2202                                    EHEA_MAX_ENTRIES_EQ, 1);
2203         if (!port->qp_eq) {
2204                 ret = -EINVAL;
2205                 ehea_error("ehea_create_eq failed (qp_eq)");
2206                 goto out_kill_eq;
2207         }
2208
2209         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2210         pr_cfg.max_entries_scq = sq_entries * 2;
2211         pr_cfg.max_entries_sq = sq_entries;
2212         pr_cfg.max_entries_rq1 = rq1_entries;
2213         pr_cfg.max_entries_rq2 = rq2_entries;
2214         pr_cfg.max_entries_rq3 = rq3_entries;
2215
2216         pr_cfg_small_rx.max_entries_rcq = 1;
2217         pr_cfg_small_rx.max_entries_scq = sq_entries;
2218         pr_cfg_small_rx.max_entries_sq = sq_entries;
2219         pr_cfg_small_rx.max_entries_rq1 = 1;
2220         pr_cfg_small_rx.max_entries_rq2 = 1;
2221         pr_cfg_small_rx.max_entries_rq3 = 1;
2222
2223         for (i = 0; i < def_qps; i++) {
2224                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2225                 if (ret)
2226                         goto out_clean_pr;
2227         }
2228         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2229                 ret = ehea_init_port_res(port, &port->port_res[i],
2230                                          &pr_cfg_small_rx, i);
2231                 if (ret)
2232                         goto out_clean_pr;
2233         }
2234
2235         return 0;
2236
2237 out_clean_pr:
2238         while (--i >= 0)
2239                 ehea_clean_portres(port, &port->port_res[i]);
2240
2241 out_kill_eq:
2242         ehea_destroy_eq(port->qp_eq);
2243         return ret;
2244 }
2245
2246 static int ehea_clean_all_portres(struct ehea_port *port)
2247 {
2248         int ret = 0;
2249         int i;
2250
2251         for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2252                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2253
2254         ret |= ehea_destroy_eq(port->qp_eq);
2255
2256         return ret;
2257 }
2258
2259 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2260 {
2261         if (adapter->active_ports)
2262                 return;
2263
2264         ehea_rem_mr(&adapter->mr);
2265 }
2266
2267 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2268 {
2269         if (adapter->active_ports)
2270                 return 0;
2271
2272         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2273 }
2274
2275 static int ehea_up(struct net_device *dev)
2276 {
2277         int ret, i;
2278         struct ehea_port *port = netdev_priv(dev);
2279
2280         if (port->state == EHEA_PORT_UP)
2281                 return 0;
2282
2283         ret = ehea_port_res_setup(port, port->num_def_qps,
2284                                   port->num_add_tx_qps);
2285         if (ret) {
2286                 ehea_error("port_res_failed");
2287                 goto out;
2288         }
2289
2290         /* Set default QP for this port */
2291         ret = ehea_configure_port(port);
2292         if (ret) {
2293                 ehea_error("ehea_configure_port failed. ret:%d", ret);
2294                 goto out_clean_pr;
2295         }
2296
2297         ret = ehea_reg_interrupts(dev);
2298         if (ret) {
2299                 ehea_error("reg_interrupts failed. ret:%d", ret);
2300                 goto out_clean_pr;
2301         }
2302
2303         for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2304                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2305                 if (ret) {
2306                         ehea_error("activate_qp failed");
2307                         goto out_free_irqs;
2308                 }
2309         }
2310
2311         for(i = 0; i < port->num_def_qps; i++) {
2312                 ret = ehea_fill_port_res(&port->port_res[i]);
2313                 if (ret) {
2314                         ehea_error("out_free_irqs");
2315                         goto out_free_irqs;
2316                 }
2317         }
2318
2319         ret = 0;
2320         port->state = EHEA_PORT_UP;
2321         goto out;
2322
2323 out_free_irqs:
2324         ehea_free_interrupts(dev);
2325
2326 out_clean_pr:
2327         ehea_clean_all_portres(port);
2328 out:
2329         if (ret)
2330                 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2331
2332         return ret;
2333 }
2334
2335 static void port_napi_disable(struct ehea_port *port)
2336 {
2337         int i;
2338
2339         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2340                 napi_disable(&port->port_res[i].napi);
2341 }
2342
2343 static void port_napi_enable(struct ehea_port *port)
2344 {
2345         int i;
2346
2347         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2348                 napi_enable(&port->port_res[i].napi);
2349 }
2350
2351 static int ehea_open(struct net_device *dev)
2352 {
2353         int ret;
2354         struct ehea_port *port = netdev_priv(dev);
2355
2356         down(&port->port_lock);
2357
2358         if (netif_msg_ifup(port))
2359                 ehea_info("enabling port %s", dev->name);
2360
2361         ret = ehea_up(dev);
2362         if (!ret) {
2363                 port_napi_enable(port);
2364                 netif_start_queue(dev);
2365         }
2366
2367         up(&port->port_lock);
2368
2369         return ret;
2370 }
2371
2372 static int ehea_down(struct net_device *dev)
2373 {
2374         int ret;
2375         struct ehea_port *port = netdev_priv(dev);
2376
2377         if (port->state == EHEA_PORT_DOWN)
2378                 return 0;
2379
2380         ehea_drop_multicast_list(dev);
2381         ehea_free_interrupts(dev);
2382
2383         port->state = EHEA_PORT_DOWN;
2384
2385         ret = ehea_clean_all_portres(port);
2386         if (ret)
2387                 ehea_info("Failed freeing resources for %s. ret=%i",
2388                           dev->name, ret);
2389
2390         return ret;
2391 }
2392
2393 static int ehea_stop(struct net_device *dev)
2394 {
2395         int ret;
2396         struct ehea_port *port = netdev_priv(dev);
2397
2398         if (netif_msg_ifdown(port))
2399                 ehea_info("disabling port %s", dev->name);
2400
2401         flush_scheduled_work();
2402         down(&port->port_lock);
2403         netif_stop_queue(dev);
2404         port_napi_disable(port);
2405         ret = ehea_down(dev);
2406         up(&port->port_lock);
2407         return ret;
2408 }
2409
2410 void ehea_purge_sq(struct ehea_qp *orig_qp)
2411 {
2412         struct ehea_qp qp = *orig_qp;
2413         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2414         struct ehea_swqe *swqe;
2415         int wqe_index;
2416         int i;
2417
2418         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2419                 swqe = ehea_get_swqe(&qp, &wqe_index);
2420                 swqe->tx_control |= EHEA_SWQE_PURGE;
2421         }
2422 }
2423
2424 int ehea_stop_qps(struct net_device *dev)
2425 {
2426         struct ehea_port *port = netdev_priv(dev);
2427         struct ehea_adapter *adapter = port->adapter;
2428         struct hcp_modify_qp_cb0* cb0;
2429         int ret = -EIO;
2430         int dret;
2431         int i;
2432         u64 hret;
2433         u64 dummy64 = 0;
2434         u16 dummy16 = 0;
2435
2436         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2437         if (!cb0) {
2438                 ret = -ENOMEM;
2439                 goto out;
2440         }
2441
2442         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2443                 struct ehea_port_res *pr =  &port->port_res[i];
2444                 struct ehea_qp *qp = pr->qp;
2445
2446                 /* Purge send queue */
2447                 ehea_purge_sq(qp);
2448
2449                 /* Disable queue pair */
2450                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2451                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2452                                             cb0);
2453                 if (hret != H_SUCCESS) {
2454                         ehea_error("query_ehea_qp failed (1)");
2455                         goto out;
2456                 }
2457
2458                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2459                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2460
2461                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2462                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2463                                                             1), cb0, &dummy64,
2464                                              &dummy64, &dummy16, &dummy16);
2465                 if (hret != H_SUCCESS) {
2466                         ehea_error("modify_ehea_qp failed (1)");
2467                         goto out;
2468                 }
2469
2470                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2471                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2472                                             cb0);
2473                 if (hret != H_SUCCESS) {
2474                         ehea_error("query_ehea_qp failed (2)");
2475                         goto out;
2476                 }
2477
2478                 /* deregister shared memory regions */
2479                 dret = ehea_rem_smrs(pr);
2480                 if (dret) {
2481                         ehea_error("unreg shared memory region failed");
2482                         goto out;
2483                 }
2484         }
2485
2486         ret = 0;
2487 out:
2488         kfree(cb0);
2489
2490         return ret;
2491 }
2492
2493 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res * pr)
2494 {
2495         struct ehea_qp qp = *orig_qp;
2496         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2497         struct ehea_rwqe *rwqe;
2498         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2499         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2500         struct sk_buff *skb;
2501         u32 lkey = pr->recv_mr.lkey;
2502
2503
2504         int i;
2505         int index;
2506
2507         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2508                 rwqe = ehea_get_next_rwqe(&qp, 2);
2509                 rwqe->sg_list[0].l_key = lkey;
2510                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2511                 skb = skba_rq2[index];
2512                 if (skb)
2513                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2514         }
2515
2516         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2517                 rwqe = ehea_get_next_rwqe(&qp, 3);
2518                 rwqe->sg_list[0].l_key = lkey;
2519                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2520                 skb = skba_rq3[index];
2521                 if (skb)
2522                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2523         }
2524 }
2525
2526 int ehea_restart_qps(struct net_device *dev)
2527 {
2528         struct ehea_port *port = netdev_priv(dev);
2529         struct ehea_adapter *adapter = port->adapter;
2530         int ret = 0;
2531         int i;
2532
2533         struct hcp_modify_qp_cb0* cb0;
2534         u64 hret;
2535         u64 dummy64 = 0;
2536         u16 dummy16 = 0;
2537
2538         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2539         if (!cb0) {
2540                 ret = -ENOMEM;
2541                 goto out;
2542         }
2543
2544         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2545                 struct ehea_port_res *pr =  &port->port_res[i];
2546                 struct ehea_qp *qp = pr->qp;
2547
2548                 ret = ehea_gen_smrs(pr);
2549                 if (ret) {
2550                         ehea_error("creation of shared memory regions failed");
2551                         goto out;
2552                 }
2553
2554                 ehea_update_rqs(qp, pr);
2555
2556                 /* Enable queue pair */
2557                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2558                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2559                                             cb0);
2560                 if (hret != H_SUCCESS) {
2561                         ehea_error("query_ehea_qp failed (1)");
2562                         goto out;
2563                 }
2564
2565                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2566                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2567
2568                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2569                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2570                                                             1), cb0, &dummy64,
2571                                              &dummy64, &dummy16, &dummy16);
2572                 if (hret != H_SUCCESS) {
2573                         ehea_error("modify_ehea_qp failed (1)");
2574                         goto out;
2575                 }
2576
2577                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2578                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2579                                             cb0);
2580                 if (hret != H_SUCCESS) {
2581                         ehea_error("query_ehea_qp failed (2)");
2582                         goto out;
2583                 }
2584
2585                 /* refill entire queue */
2586                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2587                 ehea_refill_rq2(pr, 0);
2588                 ehea_refill_rq3(pr, 0);
2589         }
2590 out:
2591         kfree(cb0);
2592
2593         return ret;
2594 }
2595
2596 static void ehea_reset_port(struct work_struct *work)
2597 {
2598         int ret;
2599         struct ehea_port *port =
2600                 container_of(work, struct ehea_port, reset_task);
2601         struct net_device *dev = port->netdev;
2602
2603         port->resets++;
2604         down(&port->port_lock);
2605         netif_stop_queue(dev);
2606
2607         port_napi_disable(port);
2608
2609         ehea_down(dev);
2610
2611         ret = ehea_up(dev);
2612         if (ret)
2613                 goto out;
2614
2615         ehea_set_multicast_list(dev);
2616
2617         if (netif_msg_timer(port))
2618                 ehea_info("Device %s resetted successfully", dev->name);
2619
2620         port_napi_enable(port);
2621
2622         netif_wake_queue(dev);
2623 out:
2624         up(&port->port_lock);
2625         return;
2626 }
2627
2628 static void ehea_rereg_mrs(struct work_struct *work)
2629 {
2630         int ret, i;
2631         struct ehea_adapter *adapter;
2632
2633         down(&dlpar_mem_lock);
2634         ehea_info("LPAR memory enlarged - re-initializing driver");
2635
2636         list_for_each_entry(adapter, &adapter_list, list)
2637                 if (adapter->active_ports) {
2638                         /* Shutdown all ports */
2639                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2640                                 struct ehea_port *port = adapter->port[i];
2641
2642                                 if (port) {
2643                                         struct net_device *dev = port->netdev;
2644
2645                                         if (dev->flags & IFF_UP) {
2646                                                 down(&port->port_lock);
2647                                                 netif_stop_queue(dev);
2648                                                 ret = ehea_stop_qps(dev);
2649                                                 if (ret) {
2650                                                         up(&port->port_lock);
2651                                                         goto out;
2652                                                 }
2653                                                 port_napi_disable(port);
2654                                                 up(&port->port_lock);
2655                                         }
2656                                 }
2657                         }
2658
2659                         /* Unregister old memory region */
2660                         ret = ehea_rem_mr(&adapter->mr);
2661                         if (ret) {
2662                                 ehea_error("unregister MR failed - driver"
2663                                            " inoperable!");
2664                                 goto out;
2665                         }
2666                 }
2667
2668         ehea_destroy_busmap();
2669         ret = ehea_create_busmap();
2670         if (ret) {
2671                 ehea_error("creating ehea busmap failed");
2672                 goto out;
2673         }
2674
2675         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2676
2677         list_for_each_entry(adapter, &adapter_list, list)
2678                 if (adapter->active_ports) {
2679                         /* Register new memory region */
2680                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2681                         if (ret) {
2682                                 ehea_error("register MR failed - driver"
2683                                            " inoperable!");
2684                                 goto out;
2685                         }
2686
2687                         /* Restart all ports */
2688                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2689                                 struct ehea_port *port = adapter->port[i];
2690
2691                                 if (port) {
2692                                         struct net_device *dev = port->netdev;
2693
2694                                         if (dev->flags & IFF_UP) {
2695                                                 down(&port->port_lock);
2696                                                 port_napi_enable(port);
2697                                                 ret = ehea_restart_qps(dev);
2698                                                 if (!ret)
2699                                                         netif_wake_queue(dev);
2700                                                 up(&port->port_lock);
2701                                         }
2702                                 }
2703                         }
2704                 }
2705        up(&dlpar_mem_lock);
2706        ehea_info("re-initializing driver complete");
2707 out:
2708         return;
2709 }
2710
2711 static void ehea_tx_watchdog(struct net_device *dev)
2712 {
2713         struct ehea_port *port = netdev_priv(dev);
2714
2715         if (netif_carrier_ok(dev) &&
2716             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2717                 schedule_work(&port->reset_task);
2718 }
2719
2720 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2721 {
2722         struct hcp_query_ehea *cb;
2723         u64 hret;
2724         int ret;
2725
2726         cb = kzalloc(PAGE_SIZE, GFP_KERNEL);
2727         if (!cb) {
2728                 ret = -ENOMEM;
2729                 goto out;
2730         }
2731
2732         hret = ehea_h_query_ehea(adapter->handle, cb);
2733
2734         if (hret != H_SUCCESS) {
2735                 ret = -EIO;
2736                 goto out_herr;
2737         }
2738
2739         adapter->max_mc_mac = cb->max_mc_mac - 1;
2740         ret = 0;
2741
2742 out_herr:
2743         kfree(cb);
2744 out:
2745         return ret;
2746 }
2747
2748 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2749 {
2750         struct hcp_ehea_port_cb4 *cb4;
2751         u64 hret;
2752         int ret = 0;
2753
2754         *jumbo = 0;
2755
2756         /* (Try to) enable *jumbo frames */
2757         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2758         if (!cb4) {
2759                 ehea_error("no mem for cb4");
2760                 ret = -ENOMEM;
2761                 goto out;
2762         } else {
2763                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2764                                               port->logical_port_id,
2765                                               H_PORT_CB4,
2766                                               H_PORT_CB4_JUMBO, cb4);
2767                 if (hret == H_SUCCESS) {
2768                         if (cb4->jumbo_frame)
2769                                 *jumbo = 1;
2770                         else {
2771                                 cb4->jumbo_frame = 1;
2772                                 hret = ehea_h_modify_ehea_port(port->adapter->
2773                                                                handle,
2774                                                                port->
2775                                                                logical_port_id,
2776                                                                H_PORT_CB4,
2777                                                                H_PORT_CB4_JUMBO,
2778                                                                cb4);
2779                                 if (hret == H_SUCCESS)
2780                                         *jumbo = 1;
2781                         }
2782                 } else
2783                         ret = -EINVAL;
2784
2785                 kfree(cb4);
2786         }
2787 out:
2788         return ret;
2789 }
2790
2791 static ssize_t ehea_show_port_id(struct device *dev,
2792                                  struct device_attribute *attr, char *buf)
2793 {
2794         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2795         return sprintf(buf, "%d", port->logical_port_id);
2796 }
2797
2798 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2799                    NULL);
2800
2801 static void __devinit logical_port_release(struct device *dev)
2802 {
2803         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2804         of_node_put(port->ofdev.node);
2805 }
2806
2807 static int ehea_driver_sysfs_add(struct device *dev,
2808                                  struct device_driver *driver)
2809 {
2810         int ret;
2811
2812         ret = sysfs_create_link(&driver->kobj, &dev->kobj,
2813                                 kobject_name(&dev->kobj));
2814         if (ret == 0) {
2815                 ret = sysfs_create_link(&dev->kobj, &driver->kobj,
2816                                         "driver");
2817                 if (ret)
2818                         sysfs_remove_link(&driver->kobj,
2819                                           kobject_name(&dev->kobj));
2820         }
2821         return ret;
2822 }
2823
2824 static void ehea_driver_sysfs_remove(struct device *dev,
2825                                      struct device_driver *driver)
2826 {
2827         struct device_driver *drv = driver;
2828
2829         if (drv) {
2830                 sysfs_remove_link(&drv->kobj, kobject_name(&dev->kobj));
2831                 sysfs_remove_link(&dev->kobj, "driver");
2832         }
2833 }
2834
2835 static struct device *ehea_register_port(struct ehea_port *port,
2836                                          struct device_node *dn)
2837 {
2838         int ret;
2839
2840         port->ofdev.node = of_node_get(dn);
2841         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2842         port->ofdev.dev.bus = &ibmebus_bus_type;
2843
2844         sprintf(port->ofdev.dev.bus_id, "port%d", port_name_cnt++);
2845         port->ofdev.dev.release = logical_port_release;
2846
2847         ret = of_device_register(&port->ofdev);
2848         if (ret) {
2849                 ehea_error("failed to register device. ret=%d", ret);
2850                 goto out;
2851         }
2852
2853         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2854         if (ret) {
2855                 ehea_error("failed to register attributes, ret=%d", ret);
2856                 goto out_unreg_of_dev;
2857         }
2858
2859         ret = ehea_driver_sysfs_add(&port->ofdev.dev, &ehea_driver.driver);
2860         if (ret) {
2861                 ehea_error("failed to register sysfs driver link");
2862                 goto out_rem_dev_file;
2863         }
2864
2865         return &port->ofdev.dev;
2866
2867 out_rem_dev_file:
2868         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2869 out_unreg_of_dev:
2870         of_device_unregister(&port->ofdev);
2871 out:
2872         return NULL;
2873 }
2874
2875 static void ehea_unregister_port(struct ehea_port *port)
2876 {
2877         ehea_driver_sysfs_remove(&port->ofdev.dev, &ehea_driver.driver);
2878         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2879         of_device_unregister(&port->ofdev);
2880 }
2881
2882 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2883                                          u32 logical_port_id,
2884                                          struct device_node *dn)
2885 {
2886         int ret;
2887         struct net_device *dev;
2888         struct ehea_port *port;
2889         struct device *port_dev;
2890         int jumbo;
2891
2892         /* allocate memory for the port structures */
2893         dev = alloc_etherdev(sizeof(struct ehea_port));
2894
2895         if (!dev) {
2896                 ehea_error("no mem for net_device");
2897                 ret = -ENOMEM;
2898                 goto out_err;
2899         }
2900
2901         port = netdev_priv(dev);
2902
2903         sema_init(&port->port_lock, 1);
2904         port->state = EHEA_PORT_DOWN;
2905         port->sig_comp_iv = sq_entries / 10;
2906
2907         port->adapter = adapter;
2908         port->netdev = dev;
2909         port->logical_port_id = logical_port_id;
2910
2911         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2912
2913         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2914         if (!port->mc_list) {
2915                 ret = -ENOMEM;
2916                 goto out_free_ethdev;
2917         }
2918
2919         INIT_LIST_HEAD(&port->mc_list->list);
2920
2921         ret = ehea_sense_port_attr(port);
2922         if (ret)
2923                 goto out_free_mc_list;
2924
2925         port_dev = ehea_register_port(port, dn);
2926         if (!port_dev)
2927                 goto out_free_mc_list;
2928
2929         SET_NETDEV_DEV(dev, port_dev);
2930
2931         /* initialize net_device structure */
2932         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
2933
2934         dev->open = ehea_open;
2935 #ifdef CONFIG_NET_POLL_CONTROLLER
2936         dev->poll_controller = ehea_netpoll;
2937 #endif
2938         dev->stop = ehea_stop;
2939         dev->hard_start_xmit = ehea_start_xmit;
2940         dev->get_stats = ehea_get_stats;
2941         dev->set_multicast_list = ehea_set_multicast_list;
2942         dev->set_mac_address = ehea_set_mac_addr;
2943         dev->change_mtu = ehea_change_mtu;
2944         dev->vlan_rx_register = ehea_vlan_rx_register;
2945         dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid;
2946         dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid;
2947         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
2948                       | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX
2949                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
2950                       | NETIF_F_LLTX;
2951         dev->tx_timeout = &ehea_tx_watchdog;
2952         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
2953
2954         INIT_WORK(&port->reset_task, ehea_reset_port);
2955
2956         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2957         if (ret) {
2958                 ret = -EIO;
2959                 goto out_unreg_port;
2960         }
2961
2962         ehea_set_ethtool_ops(dev);
2963
2964         ret = register_netdev(dev);
2965         if (ret) {
2966                 ehea_error("register_netdev failed. ret=%d", ret);
2967                 goto out_dereg_bc;
2968         }
2969
2970         port->lro_max_aggr = lro_max_aggr;
2971
2972         ret = ehea_get_jumboframe_status(port, &jumbo);
2973         if (ret)
2974                 ehea_error("failed determining jumbo frame status for %s",
2975                            port->netdev->name);
2976
2977         ehea_info("%s: Jumbo frames are %sabled", dev->name,
2978                   jumbo == 1 ? "en" : "dis");
2979
2980         adapter->active_ports++;
2981
2982         return port;
2983
2984 out_dereg_bc:
2985         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2986
2987 out_unreg_port:
2988         ehea_unregister_port(port);
2989
2990 out_free_mc_list:
2991         kfree(port->mc_list);
2992
2993 out_free_ethdev:
2994         free_netdev(dev);
2995
2996 out_err:
2997         ehea_error("setting up logical port with id=%d failed, ret=%d",
2998                    logical_port_id, ret);
2999         return NULL;
3000 }
3001
3002 static void ehea_shutdown_single_port(struct ehea_port *port)
3003 {
3004         unregister_netdev(port->netdev);
3005         ehea_unregister_port(port);
3006         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
3007         kfree(port->mc_list);
3008         free_netdev(port->netdev);
3009         port->adapter->active_ports--;
3010 }
3011
3012 static int ehea_setup_ports(struct ehea_adapter *adapter)
3013 {
3014         struct device_node *lhea_dn;
3015         struct device_node *eth_dn = NULL;
3016
3017         const u32 *dn_log_port_id;
3018         int i = 0;
3019
3020         lhea_dn = adapter->ofdev->node;
3021         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3022
3023                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3024                                                  NULL);
3025                 if (!dn_log_port_id) {
3026                         ehea_error("bad device node: eth_dn name=%s",
3027                                    eth_dn->full_name);
3028                         continue;
3029                 }
3030
3031                 if (ehea_add_adapter_mr(adapter)) {
3032                         ehea_error("creating MR failed");
3033                         of_node_put(eth_dn);
3034                         return -EIO;
3035                 }
3036
3037                 adapter->port[i] = ehea_setup_single_port(adapter,
3038                                                           *dn_log_port_id,
3039                                                           eth_dn);
3040                 if (adapter->port[i])
3041                         ehea_info("%s -> logical port id #%d",
3042                                   adapter->port[i]->netdev->name,
3043                                   *dn_log_port_id);
3044                 else
3045                         ehea_remove_adapter_mr(adapter);
3046
3047                 i++;
3048         };
3049
3050         return 0;
3051 }
3052
3053 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3054                                            u32 logical_port_id)
3055 {
3056         struct device_node *lhea_dn;
3057         struct device_node *eth_dn = NULL;
3058         const u32 *dn_log_port_id;
3059
3060         lhea_dn = adapter->ofdev->node;
3061         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3062
3063                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3064                                                  NULL);
3065                 if (dn_log_port_id)
3066                         if (*dn_log_port_id == logical_port_id)
3067                                 return eth_dn;
3068         };
3069
3070         return NULL;
3071 }
3072
3073 static ssize_t ehea_probe_port(struct device *dev,
3074                                struct device_attribute *attr,
3075                                const char *buf, size_t count)
3076 {
3077         struct ehea_adapter *adapter = dev->driver_data;
3078         struct ehea_port *port;
3079         struct device_node *eth_dn = NULL;
3080         int i;
3081
3082         u32 logical_port_id;
3083
3084         sscanf(buf, "%d", &logical_port_id);
3085
3086         port = ehea_get_port(adapter, logical_port_id);
3087
3088         if (port) {
3089                 ehea_info("adding port with logical port id=%d failed. port "
3090                           "already configured as %s.", logical_port_id,
3091                           port->netdev->name);
3092                 return -EINVAL;
3093         }
3094
3095         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3096
3097         if (!eth_dn) {
3098                 ehea_info("no logical port with id %d found", logical_port_id);
3099                 return -EINVAL;
3100         }
3101
3102         if (ehea_add_adapter_mr(adapter)) {
3103                 ehea_error("creating MR failed");
3104                 return -EIO;
3105         }
3106
3107         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3108
3109         of_node_put(eth_dn);
3110
3111         if (port) {
3112                 for (i=0; i < EHEA_MAX_PORTS; i++)
3113                         if (!adapter->port[i]) {
3114                                 adapter->port[i] = port;
3115                                 break;
3116                         }
3117
3118                 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3119                           logical_port_id);
3120         } else {
3121                 ehea_remove_adapter_mr(adapter);
3122                 return -EIO;
3123         }
3124
3125         return (ssize_t) count;
3126 }
3127
3128 static ssize_t ehea_remove_port(struct device *dev,
3129                                 struct device_attribute *attr,
3130                                 const char *buf, size_t count)
3131 {
3132         struct ehea_adapter *adapter = dev->driver_data;
3133         struct ehea_port *port;
3134         int i;
3135         u32 logical_port_id;
3136
3137         sscanf(buf, "%d", &logical_port_id);
3138
3139         port = ehea_get_port(adapter, logical_port_id);
3140
3141         if (port) {
3142                 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3143                           logical_port_id);
3144
3145                 ehea_shutdown_single_port(port);
3146
3147                 for (i=0; i < EHEA_MAX_PORTS; i++)
3148                         if (adapter->port[i] == port) {
3149                                 adapter->port[i] = NULL;
3150                                 break;
3151                         }
3152         } else {
3153                 ehea_error("removing port with logical port id=%d failed. port "
3154                            "not configured.", logical_port_id);
3155                 return -EINVAL;
3156         }
3157
3158         ehea_remove_adapter_mr(adapter);
3159
3160         return (ssize_t) count;
3161 }
3162
3163 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3164 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3165
3166 int ehea_create_device_sysfs(struct of_device *dev)
3167 {
3168         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3169         if (ret)
3170                 goto out;
3171
3172         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3173 out:
3174         return ret;
3175 }
3176
3177 void ehea_remove_device_sysfs(struct of_device *dev)
3178 {
3179         device_remove_file(&dev->dev, &dev_attr_probe_port);
3180         device_remove_file(&dev->dev, &dev_attr_remove_port);
3181 }
3182
3183 static int __devinit ehea_probe_adapter(struct of_device *dev,
3184                                         const struct of_device_id *id)
3185 {
3186         struct ehea_adapter *adapter;
3187         const u64 *adapter_handle;
3188         int ret;
3189
3190         if (!dev || !dev->node) {
3191                 ehea_error("Invalid ibmebus device probed");
3192                 return -EINVAL;
3193         }
3194
3195         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3196         if (!adapter) {
3197                 ret = -ENOMEM;
3198                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3199                 goto out;
3200         }
3201
3202         list_add(&adapter->list, &adapter_list);
3203
3204         adapter->ofdev = dev;
3205
3206         adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3207                                          NULL);
3208         if (adapter_handle)
3209                 adapter->handle = *adapter_handle;
3210
3211         if (!adapter->handle) {
3212                 dev_err(&dev->dev, "failed getting handle for adapter"
3213                         " '%s'\n", dev->node->full_name);
3214                 ret = -ENODEV;
3215                 goto out_free_ad;
3216         }
3217
3218         adapter->pd = EHEA_PD_ID;
3219
3220         dev->dev.driver_data = adapter;
3221
3222
3223         /* initialize adapter and ports */
3224         /* get adapter properties */
3225         ret = ehea_sense_adapter_attr(adapter);
3226         if (ret) {
3227                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3228                 goto out_free_ad;
3229         }
3230
3231         adapter->neq = ehea_create_eq(adapter,
3232                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3233         if (!adapter->neq) {
3234                 ret = -EIO;
3235                 dev_err(&dev->dev, "NEQ creation failed\n");
3236                 goto out_free_ad;
3237         }
3238
3239         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3240                      (unsigned long)adapter);
3241
3242         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3243                                   ehea_interrupt_neq, IRQF_DISABLED,
3244                                   "ehea_neq", adapter);
3245         if (ret) {
3246                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3247                 goto out_kill_eq;
3248         }
3249
3250         ret = ehea_create_device_sysfs(dev);
3251         if (ret)
3252                 goto out_free_irq;
3253
3254         ret = ehea_setup_ports(adapter);
3255         if (ret) {
3256                 dev_err(&dev->dev, "setup_ports failed\n");
3257                 goto out_rem_dev_sysfs;
3258         }
3259
3260         ret = 0;
3261         goto out;
3262
3263 out_rem_dev_sysfs:
3264         ehea_remove_device_sysfs(dev);
3265
3266 out_free_irq:
3267         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3268
3269 out_kill_eq:
3270         ehea_destroy_eq(adapter->neq);
3271
3272 out_free_ad:
3273         kfree(adapter);
3274 out:
3275         return ret;
3276 }
3277
3278 static int __devexit ehea_remove(struct of_device *dev)
3279 {
3280         struct ehea_adapter *adapter = dev->dev.driver_data;
3281         int i;
3282
3283         for (i = 0; i < EHEA_MAX_PORTS; i++)
3284                 if (adapter->port[i]) {
3285                         ehea_shutdown_single_port(adapter->port[i]);
3286                         adapter->port[i] = NULL;
3287                 }
3288
3289         ehea_remove_device_sysfs(dev);
3290
3291         flush_scheduled_work();
3292
3293         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3294         tasklet_kill(&adapter->neq_tasklet);
3295
3296         ehea_destroy_eq(adapter->neq);
3297         ehea_remove_adapter_mr(adapter);
3298         list_del(&adapter->list);
3299
3300         kfree(adapter);
3301
3302         return 0;
3303 }
3304
3305 static int ehea_reboot_notifier(struct notifier_block *nb,
3306                                 unsigned long action, void *unused)
3307 {
3308         if (action == SYS_RESTART) {
3309                 ehea_info("Reboot: freeing all eHEA resources");
3310                 ibmebus_unregister_driver(&ehea_driver);
3311         }
3312         return NOTIFY_DONE;
3313 }
3314
3315 static struct notifier_block ehea_reboot_nb = {
3316         .notifier_call = ehea_reboot_notifier,
3317 };
3318
3319 static int check_module_parm(void)
3320 {
3321         int ret = 0;
3322
3323         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3324             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3325                 ehea_info("Bad parameter: rq1_entries");
3326                 ret = -EINVAL;
3327         }
3328         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3329             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3330                 ehea_info("Bad parameter: rq2_entries");
3331                 ret = -EINVAL;
3332         }
3333         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3334             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3335                 ehea_info("Bad parameter: rq3_entries");
3336                 ret = -EINVAL;
3337         }
3338         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3339             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3340                 ehea_info("Bad parameter: sq_entries");
3341                 ret = -EINVAL;
3342         }
3343
3344         return ret;
3345 }
3346
3347 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3348                                       char *buf)
3349 {
3350         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3351 }
3352
3353 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3354                    ehea_show_capabilities, NULL);
3355
3356 int __init ehea_module_init(void)
3357 {
3358         int ret;
3359
3360         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3361                DRV_VERSION);
3362
3363
3364         INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3365         sema_init(&dlpar_mem_lock, 1);
3366
3367         ret = check_module_parm();
3368         if (ret)
3369                 goto out;
3370
3371         ret = ehea_create_busmap();
3372         if (ret)
3373                 goto out;
3374
3375         register_reboot_notifier(&ehea_reboot_nb);
3376
3377         ret = ibmebus_register_driver(&ehea_driver);
3378         if (ret) {
3379                 ehea_error("failed registering eHEA device driver on ebus");
3380                 goto out;
3381         }
3382
3383         ret = driver_create_file(&ehea_driver.driver,
3384                                  &driver_attr_capabilities);
3385         if (ret) {
3386                 ehea_error("failed to register capabilities attribute, ret=%d",
3387                            ret);
3388                 unregister_reboot_notifier(&ehea_reboot_nb);
3389                 ibmebus_unregister_driver(&ehea_driver);
3390                 goto out;
3391         }
3392
3393 out:
3394         return ret;
3395 }
3396
3397 static void __exit ehea_module_exit(void)
3398 {
3399         flush_scheduled_work();
3400         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3401         ibmebus_unregister_driver(&ehea_driver);
3402         unregister_reboot_notifier(&ehea_reboot_nb);
3403         ehea_destroy_busmap();
3404 }
3405
3406 module_init(ehea_module_init);
3407 module_exit(ehea_module_exit);