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   1 /*
   2  *  linux/drivers/net/ehea/ehea_main.c
   3  *
   4  *  eHEA ethernet device driver for IBM eServer System p
   5  *
   6  *  (C) Copyright IBM Corp. 2006
   7  *
   8  *  Authors:
   9  *       Christoph Raisch <raisch@de.ibm.com>
  10  *       Jan-Bernd Themann <themann@de.ibm.com>
  11  *       Thomas Klein <tklein@de.ibm.com>
  12  *
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include <linux/in.h>
  30 #include <linux/ip.h>
  31 #include <linux/tcp.h>
  32 #include <linux/udp.h>
  33 #include <linux/if.h>
  34 #include <linux/list.h>
  35 #include <linux/if_ether.h>
  36 #include <net/ip.h>
  37
  38 #include "ehea.h"
  39 #include "ehea_qmr.h"
  40 #include "ehea_phyp.h"
  41
  42
  43 MODULE_LICENSE("GPL");
  44 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  45 MODULE_DESCRIPTION("IBM eServer HEA Driver");
  46 MODULE_VERSION(DRV_VERSION);
  47
  48
  49 static int msg_level = -1;
  50 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  51 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  52 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  53 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  54 static int use_mcs = 0;
  55 static int use_lro = 0;
  56 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
  57 static int num_tx_qps = EHEA_NUM_TX_QP;
  58 static int prop_carrier_state = 0;
  59
  60 module_param(msg_level, int, 0);
  61 module_param(rq1_entries, int, 0);
  62 module_param(rq2_entries, int, 0);
  63 module_param(rq3_entries, int, 0);
  64 module_param(sq_entries, int, 0);
  65 module_param(prop_carrier_state, int, 0);
  66 module_param(use_mcs, int, 0);
  67 module_param(use_lro, int, 0);
  68 module_param(lro_max_aggr, int, 0);
  69 module_param(num_tx_qps, int, 0);
  70
  71 MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
  72 MODULE_PARM_DESC(msg_level, "msg_level");
  73 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  74                  "port to stack. 1:yes, 0:no.  Default = 0 ");
  75 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  76                  "[2^x - 1], x = [6..14]. Default = "
  77                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  78 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  79                  "[2^x - 1], x = [6..14]. Default = "
  80                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  81 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  82                  "[2^x - 1], x = [6..14]. Default = "
  83                  __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  84 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  85                  "[2^x - 1], x = [6..14]. Default = "
  86                  __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  87 MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
  88
  89 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
  90                  __MODULE_STRING(EHEA_LRO_MAX_AGGR));
  91 MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
  92                  "Default = 0");
  93
  94 static int port_name_cnt = 0;
  95 static LIST_HEAD(adapter_list);
  96 u64 ehea_driver_flags = 0;
  97 struct work_struct ehea_rereg_mr_task;
  98
  99 struct semaphore dlpar_mem_lock;
 100
 101 static int __devinit ehea_probe_adapter(struct of_device *dev,
 102                                         const struct of_device_id *id);
 103
 104 static int __devexit ehea_remove(struct of_device *dev);
 105
 106 static struct of_device_id ehea_device_table[] = {
 107         {
 108                 .name = "lhea",
 109                 .compatible = "IBM,lhea",
 110         },
 111         {},
 112 };
 113
 114 static struct of_platform_driver ehea_driver = {
 115         .name = "ehea",
 116         .match_table = ehea_device_table,
 117         .probe = ehea_probe_adapter,
 118         .remove = ehea_remove,
 119 };
 120
 121 void ehea_dump(void *adr, int len, char *msg) {
 122         int x;
 123         unsigned char *deb = adr;
 124         for (x = 0; x < len; x += 16) {
 125                 printk(DRV_NAME " %s adr=%p ofs=%04x %016lx %016lx\n", msg,
 126                           deb, x, *((u64*)&deb[0]), *((u64*)&deb[8]));
 127                 deb += 16;
 128         }
 129 }
 130
 131 static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 132 {
 133         struct ehea_port *port = netdev_priv(dev);
 134         struct net_device_stats *stats = &port->stats;
 135         struct hcp_ehea_port_cb2 *cb2;
 136         u64 hret, rx_packets;
 137         int i;
 138
 139         memset(stats, 0, sizeof(*stats));
 140
 141         cb2 = kzalloc(PAGE_SIZE, GFP_KERNEL);
 142         if (!cb2) {
 143                 ehea_error("no mem for cb2");
 144                 goto out;
 145         }
 146
 147         hret = ehea_h_query_ehea_port(port->adapter->handle,
 148                                       port->logical_port_id,
 149                                       H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 150         if (hret != H_SUCCESS) {
 151                 ehea_error("query_ehea_port failed");
 152                 goto out_herr;
 153         }
 154
 155         if (netif_msg_hw(port))
 156                 ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 157
 158         rx_packets = 0;
 159         for (i = 0; i < port->num_def_qps; i++)
 160                 rx_packets += port->port_res[i].rx_packets;
 161
 162         stats->tx_packets = cb2->txucp + cb2->txmcp + cb2->txbcp;
 163         stats->multicast = cb2->rxmcp;
 164         stats->rx_errors = cb2->rxuerr;
 165         stats->rx_bytes = cb2->rxo;
 166         stats->tx_bytes = cb2->txo;
 167         stats->rx_packets = rx_packets;
 168
 169 out_herr:
 170         kfree(cb2);
 171 out:
 172         return stats;
 173 }
 174
 175 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 176 {
 177         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 178         struct net_device *dev = pr->port->netdev;
 179         int max_index_mask = pr->rq1_skba.len - 1;
 180         int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 181         int adder = 0;
 182         int i;
 183
 184         pr->rq1_skba.os_skbs = 0;
 185
 186         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 187                 pr->rq1_skba.index = index;
 188                 pr->rq1_skba.os_skbs = fill_wqes;
 189                 return;
 190         }
 191
 192         for (i = 0; i < fill_wqes; i++) {
 193                 if (!skb_arr_rq1[index]) {
 194                         skb_arr_rq1[index] = netdev_alloc_skb(dev,
 195                                                               EHEA_L_PKT_SIZE);
 196                         if (!skb_arr_rq1[index]) {
 197                                 pr->rq1_skba.os_skbs = fill_wqes - i;
 198                                 ehea_error("%s: no mem for skb/%d wqes filled",
 199                                            dev->name, i);
 200                                 break;
 201                         }
 202                 }
 203                 index--;
 204                 index &= max_index_mask;
 205                 adder++;
 206         }
 207
 208         if (adder == 0)
 209                 return;
 210
 211         /* Ring doorbell */
 212         ehea_update_rq1a(pr->qp, adder);
 213 }
 214
 215 static int ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 216 {
 217         int ret = 0;
 218         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 219         struct net_device *dev = pr->port->netdev;
 220         int i;
 221
 222         for (i = 0; i < pr->rq1_skba.len; i++) {
 223                 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 224                 if (!skb_arr_rq1[i]) {
 225                         ehea_error("%s: no mem for skb/%d wqes filled",
 226                                    dev->name, i);
 227                         ret = -ENOMEM;
 228                         goto out;
 229                 }
 230         }
 231         /* Ring doorbell */
 232         ehea_update_rq1a(pr->qp, nr_rq1a);
 233 out:
 234         return ret;
 235 }
 236
 237 static int ehea_refill_rq_def(struct ehea_port_res *pr,
 238                               struct ehea_q_skb_arr *q_skba, int rq_nr,
 239                               int num_wqes, int wqe_type, int packet_size)
 240 {
 241         struct net_device *dev = pr->port->netdev;
 242         struct ehea_qp *qp = pr->qp;
 243         struct sk_buff **skb_arr = q_skba->arr;
 244         struct ehea_rwqe *rwqe;
 245         int i, index, max_index_mask, fill_wqes;
 246         int adder = 0;
 247         int ret = 0;
 248
 249         fill_wqes = q_skba->os_skbs + num_wqes;
 250         q_skba->os_skbs = 0;
 251
 252         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 253                 q_skba->os_skbs = fill_wqes;
 254                 return ret;
 255         }
 256
 257         index = q_skba->index;
 258         max_index_mask = q_skba->len - 1;
 259         for (i = 0; i < fill_wqes; i++) {
 260                 u64 tmp_addr;
 261                 struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
 262                 if (!skb) {
 263                         ehea_error("%s: no mem for skb/%d wqes filled",
 264                                    pr->port->netdev->name, i);
 265                         q_skba->os_skbs = fill_wqes - i;
 266                         ret = -ENOMEM;
 267                         break;
 268                 }
 269                 skb_reserve(skb, NET_IP_ALIGN);
 270
 271                 skb_arr[index] = skb;
 272                 tmp_addr = ehea_map_vaddr(skb->data);
 273                 if (tmp_addr == -1) {
 274                         dev_kfree_skb(skb);
 275                         q_skba->os_skbs = fill_wqes - i;
 276                         ret = 0;
 277                         break;
 278                 }
 279
 280                 rwqe = ehea_get_next_rwqe(qp, rq_nr);
 281                 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 282                             | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 283                 rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 284                 rwqe->sg_list[0].vaddr = tmp_addr;
 285                 rwqe->sg_list[0].len = packet_size;
 286                 rwqe->data_segments = 1;
 287
 288                 index++;
 289                 index &= max_index_mask;
 290                 adder++;
 291         }
 292
 293         q_skba->index = index;
 294         if (adder == 0)
 295                 goto out;
 296
 297         /* Ring doorbell */
 298         iosync();
 299         if (rq_nr == 2)
 300                 ehea_update_rq2a(pr->qp, adder);
 301         else
 302                 ehea_update_rq3a(pr->qp, adder);
 303 out:
 304         return ret;
 305 }
 306
 307
 308 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 309 {
 310         return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 311                                   nr_of_wqes, EHEA_RWQE2_TYPE,
 312                                   EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
 313 }
 314
 315
 316 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 317 {
 318         return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 319                                   nr_of_wqes, EHEA_RWQE3_TYPE,
 320                                   EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
 321 }
 322
 323 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 324 {
 325         *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 326         if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 327                 return 0;
 328         if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 329             (cqe->header_length == 0))
 330                 return 0;
 331         return -EINVAL;
 332 }
 333
 334 static inline void ehea_fill_skb(struct net_device *dev,
 335                                  struct sk_buff *skb, struct ehea_cqe *cqe)
 336 {
 337         int length = cqe->num_bytes_transfered - 4;     /*remove CRC */
 338
 339         skb_put(skb, length);
 340         skb->ip_summed = CHECKSUM_UNNECESSARY;
 341         skb->protocol = eth_type_trans(skb, dev);
 342 }
 343
 344 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 345                                                int arr_len,
 346                                                struct ehea_cqe *cqe)
 347 {
 348         int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 349         struct sk_buff *skb;
 350         void *pref;
 351         int x;
 352
 353         x = skb_index + 1;
 354         x &= (arr_len - 1);
 355
 356         pref = skb_array[x];
 357         prefetchw(pref);
 358         prefetchw(pref + EHEA_CACHE_LINE);
 359
 360         pref = (skb_array[x]->data);
 361         prefetch(pref);
 362         prefetch(pref + EHEA_CACHE_LINE);
 363         prefetch(pref + EHEA_CACHE_LINE * 2);
 364         prefetch(pref + EHEA_CACHE_LINE * 3);
 365         skb = skb_array[skb_index];
 366         skb_array[skb_index] = NULL;
 367         return skb;
 368 }
 369
 370 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 371                                                   int arr_len, int wqe_index)
 372 {
 373         struct sk_buff *skb;
 374         void *pref;
 375         int x;
 376
 377         x = wqe_index + 1;
 378         x &= (arr_len - 1);
 379
 380         pref = skb_array[x];
 381         prefetchw(pref);
 382         prefetchw(pref + EHEA_CACHE_LINE);
 383
 384         pref = (skb_array[x]->data);
 385         prefetchw(pref);
 386         prefetchw(pref + EHEA_CACHE_LINE);
 387
 388         skb = skb_array[wqe_index];
 389         skb_array[wqe_index] = NULL;
 390         return skb;
 391 }
 392
 393 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 394                                  struct ehea_cqe *cqe, int *processed_rq2,
 395                                  int *processed_rq3)
 396 {
 397         struct sk_buff *skb;
 398
 399         if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 400                 pr->p_stats.err_tcp_cksum++;
 401         if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 402                 pr->p_stats.err_ip_cksum++;
 403         if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 404                 pr->p_stats.err_frame_crc++;
 405
 406         if (netif_msg_rx_err(pr->port)) {
 407                 ehea_error("CQE Error for QP %d", pr->qp->init_attr.qp_nr);
 408                 ehea_dump(cqe, sizeof(*cqe), "CQE");
 409         }
 410
 411         if (rq == 2) {
 412                 *processed_rq2 += 1;
 413                 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 414                 dev_kfree_skb(skb);
 415         } else if (rq == 3) {
 416                 *processed_rq3 += 1;
 417                 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 418                 dev_kfree_skb(skb);
 419         }
 420
 421         if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 422                 ehea_error("Critical receive error. Resetting port.");
 423                 schedule_work(&pr->port->reset_task);
 424                 return 1;
 425         }
 426
 427         return 0;
 428 }
 429
 430 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
 431                        void **tcph, u64 *hdr_flags, void *priv)
 432 {
 433         struct ehea_cqe *cqe = priv;
 434         unsigned int ip_len;
 435         struct iphdr *iph;
 436
 437         /* non tcp/udp packets */
 438         if (!cqe->header_length)
 439                 return -1;
 440
 441         /* non tcp packet */
 442         skb_reset_network_header(skb);
 443         iph = ip_hdr(skb);
 444         if (iph->protocol != IPPROTO_TCP)
 445                 return -1;
 446
 447         ip_len = ip_hdrlen(skb);
 448         skb_set_transport_header(skb, ip_len);
 449         *tcph = tcp_hdr(skb);
 450
 451         /* check if ip header and tcp header are complete */
 452         if (iph->tot_len < ip_len + tcp_hdrlen(skb))
 453                 return -1;
 454
 455         *hdr_flags = LRO_IPV4 | LRO_TCP;
 456         *iphdr = iph;
 457
 458         return 0;
 459 }
 460
 461 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 462                           struct sk_buff *skb)
 463 {
 464         int vlan_extracted = (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 465                 && pr->port->vgrp;
 466
 467         if (use_lro) {
 468                 if (vlan_extracted)
 469                         lro_vlan_hwaccel_receive_skb(&pr->lro_mgr, skb,
 470                                                      pr->port->vgrp,
 471                                                      cqe->vlan_tag,
 472                                                      cqe);
 473                 else
 474                         lro_receive_skb(&pr->lro_mgr, skb, cqe);
 475         } else {
 476                 if (vlan_extracted)
 477                         vlan_hwaccel_receive_skb(skb, pr->port->vgrp,
 478                                                  cqe->vlan_tag);
 479                 else
 480                         netif_receive_skb(skb);
 481         }
 482 }
 483
 484 static int ehea_proc_rwqes(struct net_device *dev,
 485                            struct ehea_port_res *pr,
 486                            int budget)
 487 {
 488         struct ehea_port *port = pr->port;
 489         struct ehea_qp *qp = pr->qp;
 490         struct ehea_cqe *cqe;
 491         struct sk_buff *skb;
 492         struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 493         struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 494         struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 495         int skb_arr_rq1_len = pr->rq1_skba.len;
 496         int skb_arr_rq2_len = pr->rq2_skba.len;
 497         int skb_arr_rq3_len = pr->rq3_skba.len;
 498         int processed, processed_rq1, processed_rq2, processed_rq3;
 499         int wqe_index, last_wqe_index, rq, port_reset;
 500
 501         processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 502         last_wqe_index = 0;
 503
 504         cqe = ehea_poll_rq1(qp, &wqe_index);
 505         while ((processed < budget) && cqe) {
 506                 ehea_inc_rq1(qp);
 507                 processed_rq1++;
 508                 processed++;
 509                 if (netif_msg_rx_status(port))
 510                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 511
 512                 last_wqe_index = wqe_index;
 513                 rmb();
 514                 if (!ehea_check_cqe(cqe, &rq)) {
 515                         if (rq == 1) {  /* LL RQ1 */
 516                                 skb = get_skb_by_index_ll(skb_arr_rq1,
 517                                                           skb_arr_rq1_len,
 518                                                           wqe_index);
 519                                 if (unlikely(!skb)) {
 520                                         if (netif_msg_rx_err(port))
 521                                                 ehea_error("LL rq1: skb=NULL");
 522
 523                                         skb = netdev_alloc_skb(dev,
 524                                                                EHEA_L_PKT_SIZE);
 525                                         if (!skb)
 526                                                 break;
 527                                 }
 528                                 skb_copy_to_linear_data(skb, ((char*)cqe) + 64,
 529                                                  cqe->num_bytes_transfered - 4);
 530                                 ehea_fill_skb(dev, skb, cqe);
 531                         } else if (rq == 2) {  /* RQ2 */
 532                                 skb = get_skb_by_index(skb_arr_rq2,
 533                                                        skb_arr_rq2_len, cqe);
 534                                 if (unlikely(!skb)) {
 535                                         if (netif_msg_rx_err(port))
 536                                                 ehea_error("rq2: skb=NULL");
 537                                         break;
 538                                 }
 539                                 ehea_fill_skb(dev, skb, cqe);
 540                                 processed_rq2++;
 541                         } else {  /* RQ3 */
 542                                 skb = get_skb_by_index(skb_arr_rq3,
 543                                                        skb_arr_rq3_len, cqe);
 544                                 if (unlikely(!skb)) {
 545                                         if (netif_msg_rx_err(port))
 546                                                 ehea_error("rq3: skb=NULL");
 547                                         break;
 548                                 }
 549                                 ehea_fill_skb(dev, skb, cqe);
 550                                 processed_rq3++;
 551                         }
 552
 553                         ehea_proc_skb(pr, cqe, skb);
 554                         dev->last_rx = jiffies;
 555                 } else {
 556                         pr->p_stats.poll_receive_errors++;
 557                         port_reset = ehea_treat_poll_error(pr, rq, cqe,
 558                                                            &processed_rq2,
 559                                                            &processed_rq3);
 560                         if (port_reset)
 561                                 break;
 562                 }
 563                 cqe = ehea_poll_rq1(qp, &wqe_index);
 564         }
 565         if (use_lro)
 566                 lro_flush_all(&pr->lro_mgr);
 567
 568         pr->rx_packets += processed;
 569
 570         ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 571         ehea_refill_rq2(pr, processed_rq2);
 572         ehea_refill_rq3(pr, processed_rq3);
 573
 574         return processed;
 575 }
 576
 577 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 578 {
 579         struct sk_buff *skb;
 580         struct ehea_cq *send_cq = pr->send_cq;
 581         struct ehea_cqe *cqe;
 582         int quota = my_quota;
 583         int cqe_counter = 0;
 584         int swqe_av = 0;
 585         int index;
 586         unsigned long flags;
 587
 588         cqe = ehea_poll_cq(send_cq);
 589         while(cqe && (quota > 0)) {
 590                 ehea_inc_cq(send_cq);
 591
 592                 cqe_counter++;
 593                 rmb();
 594                 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 595                         ehea_error("Send Completion Error: Resetting port");
 596                         if (netif_msg_tx_err(pr->port))
 597                                 ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 598                         schedule_work(&pr->port->reset_task);
 599                         break;
 600                 }
 601
 602                 if (netif_msg_tx_done(pr->port))
 603                         ehea_dump(cqe, sizeof(*cqe), "CQE");
 604
 605                 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 606                            == EHEA_SWQE2_TYPE)) {
 607
 608                         index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 609                         skb = pr->sq_skba.arr[index];
 610                         dev_kfree_skb(skb);
 611                         pr->sq_skba.arr[index] = NULL;
 612                 }
 613
 614                 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 615                 quota--;
 616
 617                 cqe = ehea_poll_cq(send_cq);
 618         };
 619
 620         ehea_update_feca(send_cq, cqe_counter);
 621         atomic_add(swqe_av, &pr->swqe_avail);
 622
 623         spin_lock_irqsave(&pr->netif_queue, flags);
 624
 625         if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
 626                                   >= pr->swqe_refill_th)) {
 627                 netif_wake_queue(pr->port->netdev);
 628                 pr->queue_stopped = 0;
 629         }
 630         spin_unlock_irqrestore(&pr->netif_queue, flags);
 631
 632         return cqe;
 633 }
 634
 635 #define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 636 #define EHEA_POLL_MAX_CQES 65535
 637
 638 static int ehea_poll(struct napi_struct *napi, int budget)
 639 {
 640         struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, napi);
 641         struct net_device *dev = pr->port->netdev;
 642         struct ehea_cqe *cqe;
 643         struct ehea_cqe *cqe_skb = NULL;
 644         int force_irq, wqe_index;
 645         int rx = 0;
 646
 647         force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 648         cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 649
 650         if (!force_irq)
 651                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 652
 653         while ((rx != budget) || force_irq) {
 654                 pr->poll_counter = 0;
 655                 force_irq = 0;
 656                 netif_rx_complete(dev, napi);
 657                 ehea_reset_cq_ep(pr->recv_cq);
 658                 ehea_reset_cq_ep(pr->send_cq);
 659                 ehea_reset_cq_n1(pr->recv_cq);
 660                 ehea_reset_cq_n1(pr->send_cq);
 661                 cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 662                 cqe_skb = ehea_poll_cq(pr->send_cq);
 663
 664                 if (!cqe && !cqe_skb)
 665                         return rx;
 666
 667                 if (!netif_rx_reschedule(dev, napi))
 668                         return rx;
 669
 670                 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 671                 rx += ehea_proc_rwqes(dev, pr, budget - rx);
 672         }
 673
 674         pr->poll_counter++;
 675         return rx;
 676 }
 677
 678 #ifdef CONFIG_NET_POLL_CONTROLLER
 679 static void ehea_netpoll(struct net_device *dev)
 680 {
 681         struct ehea_port *port = netdev_priv(dev);
 682         int i;
 683
 684         for (i = 0; i < port->num_def_qps; i++)
 685                 netif_rx_schedule(dev, &port->port_res[i].napi);
 686 }
 687 #endif
 688
 689 static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 690 {
 691         struct ehea_port_res *pr = param;
 692
 693         netif_rx_schedule(pr->port->netdev, &pr->napi);
 694
 695         return IRQ_HANDLED;
 696 }
 697
 698 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 699 {
 700         struct ehea_port *port = param;
 701         struct ehea_eqe *eqe;
 702         struct ehea_qp *qp;
 703         u32 qp_token;
 704
 705         eqe = ehea_poll_eq(port->qp_eq);
 706
 707         while (eqe) {
 708                 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 709                 ehea_error("QP aff_err: entry=0x%lx, token=0x%x",
 710                            eqe->entry, qp_token);
 711
 712                 qp = port->port_res[qp_token].qp;
 713                 ehea_error_data(port->adapter, qp->fw_handle);
 714                 eqe = ehea_poll_eq(port->qp_eq);
 715         }
 716
 717         schedule_work(&port->reset_task);
 718
 719         return IRQ_HANDLED;
 720 }
 721
 722 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 723                                        int logical_port)
 724 {
 725         int i;
 726
 727         for (i = 0; i < EHEA_MAX_PORTS; i++)
 728                 if (adapter->port[i])
 729                         if (adapter->port[i]->logical_port_id == logical_port)
 730                                 return adapter->port[i];
 731         return NULL;
 732 }
 733
 734 int ehea_sense_port_attr(struct ehea_port *port)
 735 {
 736         int ret;
 737         u64 hret;
 738         struct hcp_ehea_port_cb0 *cb0;
 739
 740         cb0 = kzalloc(PAGE_SIZE, GFP_ATOMIC);   /* May be called via */
 741         if (!cb0) {                             /* ehea_neq_tasklet() */
 742                 ehea_error("no mem for cb0");
 743                 ret = -ENOMEM;
 744                 goto out;
 745         }
 746
 747         hret = ehea_h_query_ehea_port(port->adapter->handle,
 748                                       port->logical_port_id, H_PORT_CB0,
 749                                       EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 750                                       cb0);
 751         if (hret != H_SUCCESS) {
 752                 ret = -EIO;
 753                 goto out_free;
 754         }
 755
 756         /* MAC address */
 757         port->mac_addr = cb0->port_mac_addr << 16;
 758
 759         if (!is_valid_ether_addr((u8*)&port->mac_addr)) {
 760                 ret = -EADDRNOTAVAIL;
 761                 goto out_free;
 762         }
 763
 764         /* Port speed */
 765         switch (cb0->port_speed) {
 766         case H_SPEED_10M_H:
 767                 port->port_speed = EHEA_SPEED_10M;
 768                 port->full_duplex = 0;
 769                 break;
 770         case H_SPEED_10M_F:
 771                 port->port_speed = EHEA_SPEED_10M;
 772                 port->full_duplex = 1;
 773                 break;
 774         case H_SPEED_100M_H:
 775                 port->port_speed = EHEA_SPEED_100M;
 776                 port->full_duplex = 0;
 777                 break;
 778         case H_SPEED_100M_F:
 779                 port->port_speed = EHEA_SPEED_100M;
 780                 port->full_duplex = 1;
 781                 break;
 782         case H_SPEED_1G_F:
 783                 port->port_speed = EHEA_SPEED_1G;
 784                 port->full_duplex = 1;
 785                 break;
 786         case H_SPEED_10G_F:
 787                 port->port_speed = EHEA_SPEED_10G;
 788                 port->full_duplex = 1;
 789                 break;
 790         default:
 791                 port->port_speed = 0;
 792                 port->full_duplex = 0;
 793                 break;
 794         }
 795
 796         port->autoneg = 1;
 797         port->num_mcs = cb0->num_default_qps;
 798
 799         /* Number of default QPs */
 800         if (use_mcs)
 801                 port->num_def_qps = cb0->num_default_qps;
 802         else
 803                 port->num_def_qps = 1;
 804
 805         if (!port->num_def_qps) {
 806                 ret = -EINVAL;
 807                 goto out_free;
 808         }
 809
 810         port->num_tx_qps = num_tx_qps;
 811
 812         if (port->num_def_qps >= port->num_tx_qps)
 813                 port->num_add_tx_qps = 0;
 814         else
 815                 port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
 816
 817         ret = 0;
 818 out_free:
 819         if (ret || netif_msg_probe(port))
 820                 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
 821         kfree(cb0);
 822 out:
 823         return ret;
 824 }
 825
 826 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
 827 {
 828         struct hcp_ehea_port_cb4 *cb4;
 829         u64 hret;
 830         int ret = 0;
 831
 832         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
 833         if (!cb4) {
 834                 ehea_error("no mem for cb4");
 835                 ret = -ENOMEM;
 836                 goto out;
 837         }
 838
 839         cb4->port_speed = port_speed;
 840
 841         netif_carrier_off(port->netdev);
 842
 843         hret = ehea_h_modify_ehea_port(port->adapter->handle,
 844                                        port->logical_port_id,
 845                                        H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
 846         if (hret == H_SUCCESS) {
 847                 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
 848
 849                 hret = ehea_h_query_ehea_port(port->adapter->handle,
 850                                               port->logical_port_id,
 851                                               H_PORT_CB4, H_PORT_CB4_SPEED,
 852                                               cb4);
 853                 if (hret == H_SUCCESS) {
 854                         switch (cb4->port_speed) {
 855                         case H_SPEED_10M_H:
 856                                 port->port_speed = EHEA_SPEED_10M;
 857                                 port->full_duplex = 0;
 858                                 break;
 859                         case H_SPEED_10M_F:
 860                                 port->port_speed = EHEA_SPEED_10M;
 861                                 port->full_duplex = 1;
 862                                 break;
 863                         case H_SPEED_100M_H:
 864                                 port->port_speed = EHEA_SPEED_100M;
 865                                 port->full_duplex = 0;
 866                                 break;
 867                         case H_SPEED_100M_F:
 868                                 port->port_speed = EHEA_SPEED_100M;
 869                                 port->full_duplex = 1;
 870                                 break;
 871                         case H_SPEED_1G_F:
 872                                 port->port_speed = EHEA_SPEED_1G;
 873                                 port->full_duplex = 1;
 874                                 break;
 875                         case H_SPEED_10G_F:
 876                                 port->port_speed = EHEA_SPEED_10G;
 877                                 port->full_duplex = 1;
 878                                 break;
 879                         default:
 880                                 port->port_speed = 0;
 881                                 port->full_duplex = 0;
 882                                 break;
 883                         }
 884                 } else {
 885                         ehea_error("Failed sensing port speed");
 886                         ret = -EIO;
 887                 }
 888         } else {
 889                 if (hret == H_AUTHORITY) {
 890                         ehea_info("Hypervisor denied setting port speed");
 891                         ret = -EPERM;
 892                 } else {
 893                         ret = -EIO;
 894                         ehea_error("Failed setting port speed");
 895                 }
 896         }
 897         if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
 898                 netif_carrier_on(port->netdev);
 899
 900         kfree(cb4);
 901 out:
 902         return ret;
 903 }
 904
 905 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
 906 {
 907         int ret;
 908         u8 ec;
 909         u8 portnum;
 910         struct ehea_port *port;
 911
 912         ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
 913         portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
 914         port = ehea_get_port(adapter, portnum);
 915
 916         switch (ec) {
 917         case EHEA_EC_PORTSTATE_CHG:     /* port state change */
 918
 919                 if (!port) {
 920                         ehea_error("unknown portnum %x", portnum);
 921                         break;
 922                 }
 923
 924                 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
 925                         if (!netif_carrier_ok(port->netdev)) {
 926                                 ret = ehea_sense_port_attr(port);
 927                                 if (ret) {
 928                                         ehea_error("failed resensing port "
 929                                                    "attributes");
 930                                         break;
 931                                 }
 932
 933                                 if (netif_msg_link(port))
 934                                         ehea_info("%s: Logical port up: %dMbps "
 935                                                   "%s Duplex",
 936                                                   port->netdev->name,
 937                                                   port->port_speed,
 938                                                   port->full_duplex ==
 939                                                   1 ? "Full" : "Half");
 940
 941                                 netif_carrier_on(port->netdev);
 942                                 netif_wake_queue(port->netdev);
 943                         }
 944                 } else
 945                         if (netif_carrier_ok(port->netdev)) {
 946                                 if (netif_msg_link(port))
 947                                         ehea_info("%s: Logical port down",
 948                                                   port->netdev->name);
 949                                 netif_carrier_off(port->netdev);
 950                                 netif_stop_queue(port->netdev);
 951                         }
 952
 953                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
 954                         port->phy_link = EHEA_PHY_LINK_UP;
 955                         if (netif_msg_link(port))
 956                                 ehea_info("%s: Physical port up",
 957                                           port->netdev->name);
 958                         if (prop_carrier_state)
 959                                 netif_carrier_on(port->netdev);
 960                 } else {
 961                         port->phy_link = EHEA_PHY_LINK_DOWN;
 962                         if (netif_msg_link(port))
 963                                 ehea_info("%s: Physical port down",
 964                                           port->netdev->name);
 965                         if (prop_carrier_state)
 966                                 netif_carrier_off(port->netdev);
 967                 }
 968
 969                 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
 970                         ehea_info("External switch port is primary port");
 971                 else
 972                         ehea_info("External switch port is backup port");
 973
 974                 break;
 975         case EHEA_EC_ADAPTER_MALFUNC:
 976                 ehea_error("Adapter malfunction");
 977                 break;
 978         case EHEA_EC_PORT_MALFUNC:
 979                 ehea_info("Port malfunction: Device: %s", port->netdev->name);
 980                 netif_carrier_off(port->netdev);
 981                 netif_stop_queue(port->netdev);
 982                 break;
 983         default:
 984                 ehea_error("unknown event code %x, eqe=0x%lX", ec, eqe);
 985                 break;
 986         }
 987 }
 988
 989 static void ehea_neq_tasklet(unsigned long data)
 990 {
 991         struct ehea_adapter *adapter = (struct ehea_adapter*)data;
 992         struct ehea_eqe *eqe;
 993         u64 event_mask;
 994
 995         eqe = ehea_poll_eq(adapter->neq);
 996         ehea_debug("eqe=%p", eqe);
 997
 998         while (eqe) {
 999                 ehea_debug("*eqe=%lx", eqe->entry);
1000                 ehea_parse_eqe(adapter, eqe->entry);
1001                 eqe = ehea_poll_eq(adapter->neq);
1002                 ehea_debug("next eqe=%p", eqe);
1003         }
1004
1005         event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1006                    | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1007                    | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1008
1009         ehea_h_reset_events(adapter->handle,
1010                             adapter->neq->fw_handle, event_mask);
1011 }
1012
1013 static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1014 {
1015         struct ehea_adapter *adapter = param;
1016         tasklet_hi_schedule(&adapter->neq_tasklet);
1017         return IRQ_HANDLED;
1018 }
1019
1020
1021 static int ehea_fill_port_res(struct ehea_port_res *pr)
1022 {
1023         int ret;
1024         struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1025
1026         ret = ehea_init_fill_rq1(pr, init_attr->act_nr_rwqes_rq1
1027                                      - init_attr->act_nr_rwqes_rq2
1028                                      - init_attr->act_nr_rwqes_rq3 - 1);
1029
1030         ret |= ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1031
1032         ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1033
1034         return ret;
1035 }
1036
1037 static int ehea_reg_interrupts(struct net_device *dev)
1038 {
1039         struct ehea_port *port = netdev_priv(dev);
1040         struct ehea_port_res *pr;
1041         int i, ret;
1042
1043
1044         snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1045                  dev->name);
1046
1047         ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1048                                   ehea_qp_aff_irq_handler,
1049                                   IRQF_DISABLED, port->int_aff_name, port);
1050         if (ret) {
1051                 ehea_error("failed registering irq for qp_aff_irq_handler:"
1052                            "ist=%X", port->qp_eq->attr.ist1);
1053                 goto out_free_qpeq;
1054         }
1055
1056         if (netif_msg_ifup(port))
1057                 ehea_info("irq_handle 0x%X for function qp_aff_irq_handler "
1058                           "registered", port->qp_eq->attr.ist1);
1059
1060
1061         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1062                 pr = &port->port_res[i];
1063                 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1064                          "%s-queue%d", dev->name, i);
1065                 ret = ibmebus_request_irq(pr->eq->attr.ist1,
1066                                           ehea_recv_irq_handler,
1067                                           IRQF_DISABLED, pr->int_send_name,
1068                                           pr);
1069                 if (ret) {
1070                         ehea_error("failed registering irq for ehea_queue "
1071                                    "port_res_nr:%d, ist=%X", i,
1072                                    pr->eq->attr.ist1);
1073                         goto out_free_req;
1074                 }
1075                 if (netif_msg_ifup(port))
1076                         ehea_info("irq_handle 0x%X for function ehea_queue_int "
1077                                   "%d registered", pr->eq->attr.ist1, i);
1078         }
1079 out:
1080         return ret;
1081
1082
1083 out_free_req:
1084         while (--i >= 0) {
1085                 u32 ist = port->port_res[i].eq->attr.ist1;
1086                 ibmebus_free_irq(ist, &port->port_res[i]);
1087         }
1088
1089 out_free_qpeq:
1090         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1091         i = port->num_def_qps;
1092
1093         goto out;
1094
1095 }
1096
1097 static void ehea_free_interrupts(struct net_device *dev)
1098 {
1099         struct ehea_port *port = netdev_priv(dev);
1100         struct ehea_port_res *pr;
1101         int i;
1102
1103         /* send */
1104
1105         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
1106                 pr = &port->port_res[i];
1107                 ibmebus_free_irq(pr->eq->attr.ist1, pr);
1108                 if (netif_msg_intr(port))
1109                         ehea_info("free send irq for res %d with handle 0x%X",
1110                                   i, pr->eq->attr.ist1);
1111         }
1112
1113         /* associated events */
1114         ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1115         if (netif_msg_intr(port))
1116                 ehea_info("associated event interrupt for handle 0x%X freed",
1117                           port->qp_eq->attr.ist1);
1118 }
1119
1120 static int ehea_configure_port(struct ehea_port *port)
1121 {
1122         int ret, i;
1123         u64 hret, mask;
1124         struct hcp_ehea_port_cb0 *cb0;
1125
1126         ret = -ENOMEM;
1127         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1128         if (!cb0)
1129                 goto out;
1130
1131         cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1132                      | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1133                      | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1134                      | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1135                      | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1136                                       PXLY_RC_VLAN_FILTER)
1137                      | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1138
1139         for (i = 0; i < port->num_mcs; i++)
1140                 if (use_mcs)
1141                         cb0->default_qpn_arr[i] =
1142                                 port->port_res[i].qp->init_attr.qp_nr;
1143                 else
1144                         cb0->default_qpn_arr[i] =
1145                                 port->port_res[0].qp->init_attr.qp_nr;
1146
1147         if (netif_msg_ifup(port))
1148                 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1149
1150         mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1151              | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1152
1153         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1154                                        port->logical_port_id,
1155                                        H_PORT_CB0, mask, cb0);
1156         ret = -EIO;
1157         if (hret != H_SUCCESS)
1158                 goto out_free;
1159
1160         ret = 0;
1161
1162 out_free:
1163         kfree(cb0);
1164 out:
1165         return ret;
1166 }
1167
1168 int ehea_gen_smrs(struct ehea_port_res *pr)
1169 {
1170         int ret;
1171         struct ehea_adapter *adapter = pr->port->adapter;
1172
1173         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1174         if (ret)
1175                 goto out;
1176
1177         ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1178         if (ret)
1179                 goto out_free;
1180
1181         return 0;
1182
1183 out_free:
1184         ehea_rem_mr(&pr->send_mr);
1185 out:
1186         ehea_error("Generating SMRS failed\n");
1187         return -EIO;
1188 }
1189
1190 int ehea_rem_smrs(struct ehea_port_res *pr)
1191 {
1192         if ((ehea_rem_mr(&pr->send_mr))
1193             || (ehea_rem_mr(&pr->recv_mr)))
1194                 return -EIO;
1195         else
1196                 return 0;
1197 }
1198
1199 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1200 {
1201         int arr_size = sizeof(void*) * max_q_entries;
1202
1203         q_skba->arr = vmalloc(arr_size);
1204         if (!q_skba->arr)
1205                 return -ENOMEM;
1206
1207         memset(q_skba->arr, 0, arr_size);
1208
1209         q_skba->len = max_q_entries;
1210         q_skba->index = 0;
1211         q_skba->os_skbs = 0;
1212
1213         return 0;
1214 }
1215
1216 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1217                               struct port_res_cfg *pr_cfg, int queue_token)
1218 {
1219         struct ehea_adapter *adapter = port->adapter;
1220         enum ehea_eq_type eq_type = EHEA_EQ;
1221         struct ehea_qp_init_attr *init_attr = NULL;
1222         int ret = -EIO;
1223
1224         memset(pr, 0, sizeof(struct ehea_port_res));
1225
1226         pr->port = port;
1227         spin_lock_init(&pr->xmit_lock);
1228         spin_lock_init(&pr->netif_queue);
1229
1230         pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1231         if (!pr->eq) {
1232                 ehea_error("create_eq failed (eq)");
1233                 goto out_free;
1234         }
1235
1236         pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1237                                      pr->eq->fw_handle,
1238                                      port->logical_port_id);
1239         if (!pr->recv_cq) {
1240                 ehea_error("create_cq failed (cq_recv)");
1241                 goto out_free;
1242         }
1243
1244         pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1245                                      pr->eq->fw_handle,
1246                                      port->logical_port_id);
1247         if (!pr->send_cq) {
1248                 ehea_error("create_cq failed (cq_send)");
1249                 goto out_free;
1250         }
1251
1252         if (netif_msg_ifup(port))
1253                 ehea_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d",
1254                           pr->send_cq->attr.act_nr_of_cqes,
1255                           pr->recv_cq->attr.act_nr_of_cqes);
1256
1257         init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1258         if (!init_attr) {
1259                 ret = -ENOMEM;
1260                 ehea_error("no mem for ehea_qp_init_attr");
1261                 goto out_free;
1262         }
1263
1264         init_attr->low_lat_rq1 = 1;
1265         init_attr->signalingtype = 1;   /* generate CQE if specified in WQE */
1266         init_attr->rq_count = 3;
1267         init_attr->qp_token = queue_token;
1268         init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1269         init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1270         init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1271         init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1272         init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1273         init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1274         init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1275         init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1276         init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1277         init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1278         init_attr->port_nr = port->logical_port_id;
1279         init_attr->send_cq_handle = pr->send_cq->fw_handle;
1280         init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1281         init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1282
1283         pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1284         if (!pr->qp) {
1285                 ehea_error("create_qp failed");
1286                 ret = -EIO;
1287                 goto out_free;
1288         }
1289
1290         if (netif_msg_ifup(port))
1291                 ehea_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n "
1292                           "nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d", init_attr->qp_nr,
1293                           init_attr->act_nr_send_wqes,
1294                           init_attr->act_nr_rwqes_rq1,
1295                           init_attr->act_nr_rwqes_rq2,
1296                           init_attr->act_nr_rwqes_rq3);
1297
1298         ret = ehea_init_q_skba(&pr->sq_skba, init_attr->act_nr_send_wqes + 1);
1299         ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1300         ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1301         ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1302         if (ret)
1303                 goto out_free;
1304
1305         pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1306         if (ehea_gen_smrs(pr) != 0) {
1307                 ret = -EIO;
1308                 goto out_free;
1309         }
1310
1311         atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1312
1313         kfree(init_attr);
1314
1315         netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1316
1317         pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
1318         pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1319         pr->lro_mgr.lro_arr = pr->lro_desc;
1320         pr->lro_mgr.get_skb_header = get_skb_hdr;
1321         pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1322         pr->lro_mgr.dev = port->netdev;
1323         pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1324         pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1325
1326         ret = 0;
1327         goto out;
1328
1329 out_free:
1330         kfree(init_attr);
1331         vfree(pr->sq_skba.arr);
1332         vfree(pr->rq1_skba.arr);
1333         vfree(pr->rq2_skba.arr);
1334         vfree(pr->rq3_skba.arr);
1335         ehea_destroy_qp(pr->qp);
1336         ehea_destroy_cq(pr->send_cq);
1337         ehea_destroy_cq(pr->recv_cq);
1338         ehea_destroy_eq(pr->eq);
1339 out:
1340         return ret;
1341 }
1342
1343 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1344 {
1345         int ret, i;
1346
1347         ret = ehea_destroy_qp(pr->qp);
1348
1349         if (!ret) {
1350                 ehea_destroy_cq(pr->send_cq);
1351                 ehea_destroy_cq(pr->recv_cq);
1352                 ehea_destroy_eq(pr->eq);
1353
1354                 for (i = 0; i < pr->rq1_skba.len; i++)
1355                         if (pr->rq1_skba.arr[i])
1356                                 dev_kfree_skb(pr->rq1_skba.arr[i]);
1357
1358                 for (i = 0; i < pr->rq2_skba.len; i++)
1359                         if (pr->rq2_skba.arr[i])
1360                                 dev_kfree_skb(pr->rq2_skba.arr[i]);
1361
1362                 for (i = 0; i < pr->rq3_skba.len; i++)
1363                         if (pr->rq3_skba.arr[i])
1364                                 dev_kfree_skb(pr->rq3_skba.arr[i]);
1365
1366                 for (i = 0; i < pr->sq_skba.len; i++)
1367                         if (pr->sq_skba.arr[i])
1368                                 dev_kfree_skb(pr->sq_skba.arr[i]);
1369
1370                 vfree(pr->rq1_skba.arr);
1371                 vfree(pr->rq2_skba.arr);
1372                 vfree(pr->rq3_skba.arr);
1373                 vfree(pr->sq_skba.arr);
1374                 ret = ehea_rem_smrs(pr);
1375         }
1376         return ret;
1377 }
1378
1379 /*
1380  * The write_* functions store information in swqe which is used by
1381  * the hardware to calculate the ip/tcp/udp checksum
1382  */
1383
1384 static inline void write_ip_start_end(struct ehea_swqe *swqe,
1385                                       const struct sk_buff *skb)
1386 {
1387         swqe->ip_start = skb_network_offset(skb);
1388         swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
1389 }
1390
1391 static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
1392                                         const struct sk_buff *skb)
1393 {
1394         swqe->tcp_offset =
1395                 (u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
1396
1397         swqe->tcp_end = (u16)skb->len - 1;
1398 }
1399
1400 static inline void write_udp_offset_end(struct ehea_swqe *swqe,
1401                                         const struct sk_buff *skb)
1402 {
1403         swqe->tcp_offset =
1404                 (u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
1405
1406         swqe->tcp_end = (u16)skb->len - 1;
1407 }
1408
1409
1410 static void write_swqe2_TSO(struct sk_buff *skb,
1411                             struct ehea_swqe *swqe, u32 lkey)
1412 {
1413         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1414         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1415         int skb_data_size = skb->len - skb->data_len;
1416         int headersize;
1417
1418         /* Packet is TCP with TSO enabled */
1419         swqe->tx_control |= EHEA_SWQE_TSO;
1420         swqe->mss = skb_shinfo(skb)->gso_size;
1421         /* copy only eth/ip/tcp headers to immediate data and
1422          * the rest of skb->data to sg1entry
1423          */
1424         headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1425
1426         skb_data_size = skb->len - skb->data_len;
1427
1428         if (skb_data_size >= headersize) {
1429                 /* copy immediate data */
1430                 skb_copy_from_linear_data(skb, imm_data, headersize);
1431                 swqe->immediate_data_length = headersize;
1432
1433                 if (skb_data_size > headersize) {
1434                         /* set sg1entry data */
1435                         sg1entry->l_key = lkey;
1436                         sg1entry->len = skb_data_size - headersize;
1437                         sg1entry->vaddr =
1438                                 ehea_map_vaddr(skb->data + headersize);
1439                         swqe->descriptors++;
1440                 }
1441         } else
1442                 ehea_error("cannot handle fragmented headers");
1443 }
1444
1445 static void write_swqe2_nonTSO(struct sk_buff *skb,
1446                                struct ehea_swqe *swqe, u32 lkey)
1447 {
1448         int skb_data_size = skb->len - skb->data_len;
1449         u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1450         struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1451
1452         /* Packet is any nonTSO type
1453          *
1454          * Copy as much as possible skb->data to immediate data and
1455          * the rest to sg1entry
1456          */
1457         if (skb_data_size >= SWQE2_MAX_IMM) {
1458                 /* copy immediate data */
1459                 skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
1460
1461                 swqe->immediate_data_length = SWQE2_MAX_IMM;
1462
1463                 if (skb_data_size > SWQE2_MAX_IMM) {
1464                         /* copy sg1entry data */
1465                         sg1entry->l_key = lkey;
1466                         sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
1467                         sg1entry->vaddr =
1468                                 ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
1469                         swqe->descriptors++;
1470                 }
1471         } else {
1472                 skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1473                 swqe->immediate_data_length = skb_data_size;
1474         }
1475 }
1476
1477 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1478                                     struct ehea_swqe *swqe, u32 lkey)
1479 {
1480         struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1481         skb_frag_t *frag;
1482         int nfrags, sg1entry_contains_frag_data, i;
1483
1484         nfrags = skb_shinfo(skb)->nr_frags;
1485         sg1entry = &swqe->u.immdata_desc.sg_entry;
1486         sg_list = (struct ehea_vsgentry*)&swqe->u.immdata_desc.sg_list;
1487         swqe->descriptors = 0;
1488         sg1entry_contains_frag_data = 0;
1489
1490         if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
1491                 write_swqe2_TSO(skb, swqe, lkey);
1492         else
1493                 write_swqe2_nonTSO(skb, swqe, lkey);
1494
1495         /* write descriptors */
1496         if (nfrags > 0) {
1497                 if (swqe->descriptors == 0) {
1498                         /* sg1entry not yet used */
1499                         frag = &skb_shinfo(skb)->frags[0];
1500
1501                         /* copy sg1entry data */
1502                         sg1entry->l_key = lkey;
1503                         sg1entry->len = frag->size;
1504                         sg1entry->vaddr =
1505                                 ehea_map_vaddr(page_address(frag->page)
1506                                                + frag->page_offset);
1507                         swqe->descriptors++;
1508                         sg1entry_contains_frag_data = 1;
1509                 }
1510
1511                 for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1512
1513                         frag = &skb_shinfo(skb)->frags[i];
1514                         sgentry = &sg_list[i - sg1entry_contains_frag_data];
1515
1516                         sgentry->l_key = lkey;
1517                         sgentry->len = frag->size;
1518                         sgentry->vaddr =
1519                                 ehea_map_vaddr(page_address(frag->page)
1520                                                + frag->page_offset);
1521                         swqe->descriptors++;
1522                 }
1523         }
1524 }
1525
1526 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1527 {
1528         int ret = 0;
1529         u64 hret;
1530         u8 reg_type;
1531
1532         /* De/Register untagged packets */
1533         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1534         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1535                                      port->logical_port_id,
1536                                      reg_type, port->mac_addr, 0, hcallid);
1537         if (hret != H_SUCCESS) {
1538                 ehea_error("%sregistering bc address failed (tagged)",
1539                            hcallid == H_REG_BCMC ? "" : "de");
1540                 ret = -EIO;
1541                 goto out_herr;
1542         }
1543
1544         /* De/Register VLAN packets */
1545         reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1546         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1547                                      port->logical_port_id,
1548                                      reg_type, port->mac_addr, 0, hcallid);
1549         if (hret != H_SUCCESS) {
1550                 ehea_error("%sregistering bc address failed (vlan)",
1551                            hcallid == H_REG_BCMC ? "" : "de");
1552                 ret = -EIO;
1553         }
1554 out_herr:
1555         return ret;
1556 }
1557
1558 static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1559 {
1560         struct ehea_port *port = netdev_priv(dev);
1561         struct sockaddr *mac_addr = sa;
1562         struct hcp_ehea_port_cb0 *cb0;
1563         int ret;
1564         u64 hret;
1565
1566         if (!is_valid_ether_addr(mac_addr->sa_data)) {
1567                 ret = -EADDRNOTAVAIL;
1568                 goto out;
1569         }
1570
1571         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
1572         if (!cb0) {
1573                 ehea_error("no mem for cb0");
1574                 ret = -ENOMEM;
1575                 goto out;
1576         }
1577
1578         memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1579
1580         cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1581
1582         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1583                                        port->logical_port_id, H_PORT_CB0,
1584                                        EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1585         if (hret != H_SUCCESS) {
1586                 ret = -EIO;
1587                 goto out_free;
1588         }
1589
1590         memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1591
1592         /* Deregister old MAC in pHYP */
1593         ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1594         if (ret)
1595                 goto out_free;
1596
1597         port->mac_addr = cb0->port_mac_addr << 16;
1598
1599         /* Register new MAC in pHYP */
1600         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1601         if (ret)
1602                 goto out_free;
1603
1604         ret = 0;
1605 out_free:
1606         kfree(cb0);
1607 out:
1608         return ret;
1609 }
1610
1611 static void ehea_promiscuous_error(u64 hret, int enable)
1612 {
1613         if (hret == H_AUTHORITY)
1614                 ehea_info("Hypervisor denied %sabling promiscuous mode",
1615                           enable == 1 ? "en" : "dis");
1616         else
1617                 ehea_error("failed %sabling promiscuous mode",
1618                            enable == 1 ? "en" : "dis");
1619 }
1620
1621 static void ehea_promiscuous(struct net_device *dev, int enable)
1622 {
1623         struct ehea_port *port = netdev_priv(dev);
1624         struct hcp_ehea_port_cb7 *cb7;
1625         u64 hret;
1626
1627         if ((enable && port->promisc) || (!enable && !port->promisc))
1628                 return;
1629
1630         cb7 = kzalloc(PAGE_SIZE, GFP_ATOMIC);
1631         if (!cb7) {
1632                 ehea_error("no mem for cb7");
1633                 goto out;
1634         }
1635
1636         /* Modify Pxs_DUCQPN in CB7 */
1637         cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1638
1639         hret = ehea_h_modify_ehea_port(port->adapter->handle,
1640                                        port->logical_port_id,
1641                                        H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1642         if (hret) {
1643                 ehea_promiscuous_error(hret, enable);
1644                 goto out;
1645         }
1646
1647         port->promisc = enable;
1648 out:
1649         kfree(cb7);
1650         return;
1651 }
1652
1653 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1654                                      u32 hcallid)
1655 {
1656         u64 hret;
1657         u8 reg_type;
1658
1659         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1660                  | EHEA_BCMC_UNTAGGED;
1661
1662         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1663                                      port->logical_port_id,
1664                                      reg_type, mc_mac_addr, 0, hcallid);
1665         if (hret)
1666                 goto out;
1667
1668         reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST
1669                  | EHEA_BCMC_VLANID_ALL;
1670
1671         hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1672                                      port->logical_port_id,
1673                                      reg_type, mc_mac_addr, 0, hcallid);
1674 out:
1675         return hret;
1676 }
1677
1678 static int ehea_drop_multicast_list(struct net_device *dev)
1679 {
1680         struct ehea_port *port = netdev_priv(dev);
1681         struct ehea_mc_list *mc_entry = port->mc_list;
1682         struct list_head *pos;
1683         struct list_head *temp;
1684         int ret = 0;
1685         u64 hret;
1686
1687         list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1688                 mc_entry = list_entry(pos, struct ehea_mc_list, list);
1689
1690                 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1691                                                  H_DEREG_BCMC);
1692                 if (hret) {
1693                         ehea_error("failed deregistering mcast MAC");
1694                         ret = -EIO;
1695                 }
1696
1697                 list_del(pos);
1698                 kfree(mc_entry);
1699         }
1700         return ret;
1701 }
1702
1703 static void ehea_allmulti(struct net_device *dev, int enable)
1704 {
1705         struct ehea_port *port = netdev_priv(dev);
1706         u64 hret;
1707
1708         if (!port->allmulti) {
1709                 if (enable) {
1710                         /* Enable ALLMULTI */
1711                         ehea_drop_multicast_list(dev);
1712                         hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1713                         if (!hret)
1714                                 port->allmulti = 1;
1715                         else
1716                                 ehea_error("failed enabling IFF_ALLMULTI");
1717                 }
1718         } else
1719                 if (!enable) {
1720                         /* Disable ALLMULTI */
1721                         hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1722                         if (!hret)
1723                                 port->allmulti = 0;
1724                         else
1725                                 ehea_error("failed disabling IFF_ALLMULTI");
1726                 }
1727 }
1728
1729 static void ehea_add_multicast_entry(struct ehea_port* port, u8* mc_mac_addr)
1730 {
1731         struct ehea_mc_list *ehea_mcl_entry;
1732         u64 hret;
1733
1734         ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1735         if (!ehea_mcl_entry) {
1736                 ehea_error("no mem for mcl_entry");
1737                 return;
1738         }
1739
1740         INIT_LIST_HEAD(&ehea_mcl_entry->list);
1741
1742         memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1743
1744         hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1745                                          H_REG_BCMC);
1746         if (!hret)
1747                 list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1748         else {
1749                 ehea_error("failed registering mcast MAC");
1750                 kfree(ehea_mcl_entry);
1751         }
1752 }
1753
1754 static void ehea_set_multicast_list(struct net_device *dev)
1755 {
1756         struct ehea_port *port = netdev_priv(dev);
1757         struct dev_mc_list *k_mcl_entry;
1758         int ret, i;
1759
1760         if (dev->flags & IFF_PROMISC) {
1761                 ehea_promiscuous(dev, 1);
1762                 return;
1763         }
1764         ehea_promiscuous(dev, 0);
1765
1766         if (dev->flags & IFF_ALLMULTI) {
1767                 ehea_allmulti(dev, 1);
1768                 return;
1769         }
1770         ehea_allmulti(dev, 0);
1771
1772         if (dev->mc_count) {
1773                 ret = ehea_drop_multicast_list(dev);
1774                 if (ret) {
1775                         /* Dropping the current multicast list failed.
1776                          * Enabling ALL_MULTI is the best we can do.
1777                          */
1778                         ehea_allmulti(dev, 1);
1779                 }
1780
1781                 if (dev->mc_count > port->adapter->max_mc_mac) {
1782                         ehea_info("Mcast registration limit reached (0x%lx). "
1783                                   "Use ALLMULTI!",
1784                                   port->adapter->max_mc_mac);
1785                         goto out;
1786                 }
1787
1788                 for (i = 0, k_mcl_entry = dev->mc_list;
1789                      i < dev->mc_count;
1790                      i++, k_mcl_entry = k_mcl_entry->next) {
1791                         ehea_add_multicast_entry(port, k_mcl_entry->dmi_addr);
1792                 }
1793         }
1794 out:
1795         return;
1796 }
1797
1798 static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1799 {
1800         if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1801                 return -EINVAL;
1802         dev->mtu = new_mtu;
1803         return 0;
1804 }
1805
1806 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1807                        struct ehea_swqe *swqe, u32 lkey)
1808 {
1809         if (skb->protocol == htons(ETH_P_IP)) {
1810                 const struct iphdr *iph = ip_hdr(skb);
1811
1812                 /* IPv4 */
1813                 swqe->tx_control |= EHEA_SWQE_CRC
1814                                  | EHEA_SWQE_IP_CHECKSUM
1815                                  | EHEA_SWQE_TCP_CHECKSUM
1816                                  | EHEA_SWQE_IMM_DATA_PRESENT
1817                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
1818
1819                 write_ip_start_end(swqe, skb);
1820
1821                 if (iph->protocol == IPPROTO_UDP) {
1822                         if ((iph->frag_off & IP_MF)
1823                             || (iph->frag_off & IP_OFFSET))
1824                                 /* IP fragment, so don't change cs */
1825                                 swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
1826                         else
1827                                 write_udp_offset_end(swqe, skb);
1828                 } else if (iph->protocol == IPPROTO_TCP) {
1829                         write_tcp_offset_end(swqe, skb);
1830                 }
1831
1832                 /* icmp (big data) and ip segmentation packets (all other ip
1833                    packets) do not require any special handling */
1834
1835         } else {
1836                 /* Other Ethernet Protocol */
1837                 swqe->tx_control |= EHEA_SWQE_CRC
1838                                  | EHEA_SWQE_IMM_DATA_PRESENT
1839                                  | EHEA_SWQE_DESCRIPTORS_PRESENT;
1840         }
1841
1842         write_swqe2_data(skb, dev, swqe, lkey);
1843 }
1844
1845 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
1846                        struct ehea_swqe *swqe)
1847 {
1848         int nfrags = skb_shinfo(skb)->nr_frags;
1849         u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
1850         skb_frag_t *frag;
1851         int i;
1852
1853         if (skb->protocol == htons(ETH_P_IP)) {
1854                 const struct iphdr *iph = ip_hdr(skb);
1855
1856                 /* IPv4 */
1857                 write_ip_start_end(swqe, skb);
1858
1859                 if (iph->protocol == IPPROTO_TCP) {
1860                         swqe->tx_control |= EHEA_SWQE_CRC
1861                                          | EHEA_SWQE_IP_CHECKSUM
1862                                          | EHEA_SWQE_TCP_CHECKSUM
1863                                          | EHEA_SWQE_IMM_DATA_PRESENT;
1864
1865                         write_tcp_offset_end(swqe, skb);
1866
1867                 } else if (iph->protocol == IPPROTO_UDP) {
1868                         if ((iph->frag_off & IP_MF)
1869                             || (iph->frag_off & IP_OFFSET))
1870                                 /* IP fragment, so don't change cs */
1871                                 swqe->tx_control |= EHEA_SWQE_CRC
1872                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
1873                         else {
1874                                 swqe->tx_control |= EHEA_SWQE_CRC
1875                                                  | EHEA_SWQE_IP_CHECKSUM
1876                                                  | EHEA_SWQE_TCP_CHECKSUM
1877                                                  | EHEA_SWQE_IMM_DATA_PRESENT;
1878
1879                                 write_udp_offset_end(swqe, skb);
1880                         }
1881                 } else {
1882                         /* icmp (big data) and
1883                            ip segmentation packets (all other ip packets) */
1884                         swqe->tx_control |= EHEA_SWQE_CRC
1885                                          | EHEA_SWQE_IP_CHECKSUM
1886                                          | EHEA_SWQE_IMM_DATA_PRESENT;
1887                 }
1888         } else {
1889                 /* Other Ethernet Protocol */
1890                 swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
1891         }
1892         /* copy (immediate) data */
1893         if (nfrags == 0) {
1894                 /* data is in a single piece */
1895                 skb_copy_from_linear_data(skb, imm_data, skb->len);
1896         } else {
1897                 /* first copy data from the skb->data buffer ... */
1898                 skb_copy_from_linear_data(skb, imm_data,
1899                                           skb->len - skb->data_len);
1900                 imm_data += skb->len - skb->data_len;
1901
1902                 /* ... then copy data from the fragments */
1903                 for (i = 0; i < nfrags; i++) {
1904                         frag = &skb_shinfo(skb)->frags[i];
1905                         memcpy(imm_data,
1906                                page_address(frag->page) + frag->page_offset,
1907                                frag->size);
1908                         imm_data += frag->size;
1909                 }
1910         }
1911         swqe->immediate_data_length = skb->len;
1912         dev_kfree_skb(skb);
1913 }
1914
1915 static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
1916 {
1917         struct tcphdr *tcp;
1918         u32 tmp;
1919
1920         if ((skb->protocol == htons(ETH_P_IP)) &&
1921             (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
1922                 tcp = (struct tcphdr*)(skb_network_header(skb) + (ip_hdr(skb)->ihl * 4));
1923                 tmp = (tcp->source + (tcp->dest << 16)) % 31;
1924                 tmp += ip_hdr(skb)->daddr % 31;
1925                 return tmp % num_qps;
1926         }
1927         else
1928                 return 0;
1929 }
1930
1931 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
1932 {
1933         struct ehea_port *port = netdev_priv(dev);
1934         struct ehea_swqe *swqe;
1935         unsigned long flags;
1936         u32 lkey;
1937         int swqe_index;
1938         struct ehea_port_res *pr;
1939
1940         pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
1941
1942         if (!spin_trylock(&pr->xmit_lock))
1943                 return NETDEV_TX_BUSY;
1944
1945         if (pr->queue_stopped) {
1946                 spin_unlock(&pr->xmit_lock);
1947                 return NETDEV_TX_BUSY;
1948         }
1949
1950         swqe = ehea_get_swqe(pr->qp, &swqe_index);
1951         memset(swqe, 0, SWQE_HEADER_SIZE);
1952         atomic_dec(&pr->swqe_avail);
1953
1954         if (skb->len <= SWQE3_MAX_IMM) {
1955                 u32 sig_iv = port->sig_comp_iv;
1956                 u32 swqe_num = pr->swqe_id_counter;
1957                 ehea_xmit3(skb, dev, swqe);
1958                 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
1959                         | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
1960                 if (pr->swqe_ll_count >= (sig_iv - 1)) {
1961                         swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
1962                                                       sig_iv);
1963                         swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1964                         pr->swqe_ll_count = 0;
1965                 } else
1966                         pr->swqe_ll_count += 1;
1967         } else {
1968                 swqe->wr_id =
1969                         EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
1970                       | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
1971                       | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
1972                       | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
1973                 pr->sq_skba.arr[pr->sq_skba.index] = skb;
1974
1975                 pr->sq_skba.index++;
1976                 pr->sq_skba.index &= (pr->sq_skba.len - 1);
1977
1978                 lkey = pr->send_mr.lkey;
1979                 ehea_xmit2(skb, dev, swqe, lkey);
1980                 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
1981         }
1982         pr->swqe_id_counter += 1;
1983
1984         if (port->vgrp && vlan_tx_tag_present(skb)) {
1985                 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
1986                 swqe->vlan_tag = vlan_tx_tag_get(skb);
1987         }
1988
1989         if (netif_msg_tx_queued(port)) {
1990                 ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr);
1991                 ehea_dump(swqe, 512, "swqe");
1992         }
1993
1994         if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
1995                 netif_stop_queue(dev);
1996                 swqe->tx_control |= EHEA_SWQE_PURGE;
1997         }
1998
1999         ehea_post_swqe(pr->qp, swqe);
2000
2001         if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2002                 spin_lock_irqsave(&pr->netif_queue, flags);
2003                 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2004                         pr->p_stats.queue_stopped++;
2005                         netif_stop_queue(dev);
2006                         pr->queue_stopped = 1;
2007                 }
2008                 spin_unlock_irqrestore(&pr->netif_queue, flags);
2009         }
2010         dev->trans_start = jiffies;
2011         spin_unlock(&pr->xmit_lock);
2012
2013         return NETDEV_TX_OK;
2014 }
2015
2016 static void ehea_vlan_rx_register(struct net_device *dev,
2017                                   struct vlan_group *grp)
2018 {
2019         struct ehea_port *port = netdev_priv(dev);
2020         struct ehea_adapter *adapter = port->adapter;
2021         struct hcp_ehea_port_cb1 *cb1;
2022         u64 hret;
2023
2024         port->vgrp = grp;
2025
2026         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2027         if (!cb1) {
2028                 ehea_error("no mem for cb1");
2029                 goto out;
2030         }
2031
2032         memset(cb1->vlan_filter, 0, sizeof(cb1->vlan_filter));
2033
2034         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2035                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2036         if (hret != H_SUCCESS)
2037                 ehea_error("modify_ehea_port failed");
2038
2039         kfree(cb1);
2040 out:
2041         return;
2042 }
2043
2044 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
2045 {
2046         struct ehea_port *port = netdev_priv(dev);
2047         struct ehea_adapter *adapter = port->adapter;
2048         struct hcp_ehea_port_cb1 *cb1;
2049         int index;
2050         u64 hret;
2051
2052         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2053         if (!cb1) {
2054                 ehea_error("no mem for cb1");
2055                 goto out;
2056         }
2057
2058         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2059                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2060         if (hret != H_SUCCESS) {
2061                 ehea_error("query_ehea_port failed");
2062                 goto out;
2063         }
2064
2065         index = (vid / 64);
2066         cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2067
2068         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2069                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2070         if (hret != H_SUCCESS)
2071                 ehea_error("modify_ehea_port failed");
2072 out:
2073         kfree(cb1);
2074         return;
2075 }
2076
2077 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
2078 {
2079         struct ehea_port *port = netdev_priv(dev);
2080         struct ehea_adapter *adapter = port->adapter;
2081         struct hcp_ehea_port_cb1 *cb1;
2082         int index;
2083         u64 hret;
2084
2085         vlan_group_set_device(port->vgrp, vid, NULL);
2086
2087         cb1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2088         if (!cb1) {
2089                 ehea_error("no mem for cb1");
2090                 goto out;
2091         }
2092
2093         hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2094                                       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2095         if (hret != H_SUCCESS) {
2096                 ehea_error("query_ehea_port failed");
2097                 goto out;
2098         }
2099
2100         index = (vid / 64);
2101         cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2102
2103         hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2104                                        H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2105         if (hret != H_SUCCESS)
2106                 ehea_error("modify_ehea_port failed");
2107 out:
2108         kfree(cb1);
2109         return;
2110 }
2111
2112 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2113 {
2114         int ret = -EIO;
2115         u64 hret;
2116         u16 dummy16 = 0;
2117         u64 dummy64 = 0;
2118         struct hcp_modify_qp_cb0* cb0;
2119
2120         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2121         if (!cb0) {
2122                 ret = -ENOMEM;
2123                 goto out;
2124         }
2125
2126         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2127                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2128         if (hret != H_SUCCESS) {
2129                 ehea_error("query_ehea_qp failed (1)");
2130                 goto out;
2131         }
2132
2133         cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2134         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2135                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2136                                      &dummy64, &dummy64, &dummy16, &dummy16);
2137         if (hret != H_SUCCESS) {
2138                 ehea_error("modify_ehea_qp failed (1)");
2139                 goto out;
2140         }
2141
2142         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2143                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2144         if (hret != H_SUCCESS) {
2145                 ehea_error("query_ehea_qp failed (2)");
2146                 goto out;
2147         }
2148
2149         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2150         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2151                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2152                                      &dummy64, &dummy64, &dummy16, &dummy16);
2153         if (hret != H_SUCCESS) {
2154                 ehea_error("modify_ehea_qp failed (2)");
2155                 goto out;
2156         }
2157
2158         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2159                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2160         if (hret != H_SUCCESS) {
2161                 ehea_error("query_ehea_qp failed (3)");
2162                 goto out;
2163         }
2164
2165         cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2166         hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2167                                      EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2168                                      &dummy64, &dummy64, &dummy16, &dummy16);
2169         if (hret != H_SUCCESS) {
2170                 ehea_error("modify_ehea_qp failed (3)");
2171                 goto out;
2172         }
2173
2174         hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2175                                     EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2176         if (hret != H_SUCCESS) {
2177                 ehea_error("query_ehea_qp failed (4)");
2178                 goto out;
2179         }
2180
2181         ret = 0;
2182 out:
2183         kfree(cb0);
2184         return ret;
2185 }
2186
2187 static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
2188                                int add_tx_qps)
2189 {
2190         int ret, i;
2191         struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2192         enum ehea_eq_type eq_type = EHEA_EQ;
2193
2194         port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2195                                    EHEA_MAX_ENTRIES_EQ, 1);
2196         if (!port->qp_eq) {
2197                 ret = -EINVAL;
2198                 ehea_error("ehea_create_eq failed (qp_eq)");
2199                 goto out_kill_eq;
2200         }
2201
2202         pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2203         pr_cfg.max_entries_scq = sq_entries * 2;
2204         pr_cfg.max_entries_sq = sq_entries;
2205         pr_cfg.max_entries_rq1 = rq1_entries;
2206         pr_cfg.max_entries_rq2 = rq2_entries;
2207         pr_cfg.max_entries_rq3 = rq3_entries;
2208
2209         pr_cfg_small_rx.max_entries_rcq = 1;
2210         pr_cfg_small_rx.max_entries_scq = sq_entries;
2211         pr_cfg_small_rx.max_entries_sq = sq_entries;
2212         pr_cfg_small_rx.max_entries_rq1 = 1;
2213         pr_cfg_small_rx.max_entries_rq2 = 1;
2214         pr_cfg_small_rx.max_entries_rq3 = 1;
2215
2216         for (i = 0; i < def_qps; i++) {
2217                 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2218                 if (ret)
2219                         goto out_clean_pr;
2220         }
2221         for (i = def_qps; i < def_qps + add_tx_qps; i++) {
2222                 ret = ehea_init_port_res(port, &port->port_res[i],
2223                                          &pr_cfg_small_rx, i);
2224                 if (ret)
2225                         goto out_clean_pr;
2226         }
2227
2228         return 0;
2229
2230 out_clean_pr:
2231         while (--i >= 0)
2232                 ehea_clean_portres(port, &port->port_res[i]);
2233
2234 out_kill_eq:
2235         ehea_destroy_eq(port->qp_eq);
2236         return ret;
2237 }
2238
2239 static int ehea_clean_all_portres(struct ehea_port *port)
2240 {
2241         int ret = 0;
2242         int i;
2243
2244         for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2245                 ret |= ehea_clean_portres(port, &port->port_res[i]);
2246
2247         ret |= ehea_destroy_eq(port->qp_eq);
2248
2249         return ret;
2250 }
2251
2252 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2253 {
2254         if (adapter->active_ports)
2255                 return;
2256
2257         ehea_rem_mr(&adapter->mr);
2258 }
2259
2260 static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2261 {
2262         if (adapter->active_ports)
2263                 return 0;
2264
2265         return ehea_reg_kernel_mr(adapter, &adapter->mr);
2266 }
2267
2268 static int ehea_up(struct net_device *dev)
2269 {
2270         int ret, i;
2271         struct ehea_port *port = netdev_priv(dev);
2272
2273         if (port->state == EHEA_PORT_UP)
2274                 return 0;
2275
2276         ret = ehea_port_res_setup(port, port->num_def_qps,
2277                                   port->num_add_tx_qps);
2278         if (ret) {
2279                 ehea_error("port_res_failed");
2280                 goto out;
2281         }
2282
2283         /* Set default QP for this port */
2284         ret = ehea_configure_port(port);
2285         if (ret) {
2286                 ehea_error("ehea_configure_port failed. ret:%d", ret);
2287                 goto out_clean_pr;
2288         }
2289
2290         ret = ehea_reg_interrupts(dev);
2291         if (ret) {
2292                 ehea_error("reg_interrupts failed. ret:%d", ret);
2293                 goto out_clean_pr;
2294         }
2295
2296         for(i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
2297                 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2298                 if (ret) {
2299                         ehea_error("activate_qp failed");
2300                         goto out_free_irqs;
2301                 }
2302         }
2303
2304         for(i = 0; i < port->num_def_qps; i++) {
2305                 ret = ehea_fill_port_res(&port->port_res[i]);
2306                 if (ret) {
2307                         ehea_error("out_free_irqs");
2308                         goto out_free_irqs;
2309                 }
2310         }
2311
2312         ret = 0;
2313         port->state = EHEA_PORT_UP;
2314         goto out;
2315
2316 out_free_irqs:
2317         ehea_free_interrupts(dev);
2318
2319 out_clean_pr:
2320         ehea_clean_all_portres(port);
2321 out:
2322         if (ret)
2323                 ehea_info("Failed starting %s. ret=%i", dev->name, ret);
2324
2325         return ret;
2326 }
2327
2328 static void port_napi_disable(struct ehea_port *port)
2329 {
2330         int i;
2331
2332         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2333                 napi_disable(&port->port_res[i].napi);
2334 }
2335
2336 static void port_napi_enable(struct ehea_port *port)
2337 {
2338         int i;
2339
2340         for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
2341                 napi_enable(&port->port_res[i].napi);
2342 }
2343
2344 static int ehea_open(struct net_device *dev)
2345 {
2346         int ret;
2347         struct ehea_port *port = netdev_priv(dev);
2348
2349         down(&port->port_lock);
2350
2351         if (netif_msg_ifup(port))
2352                 ehea_info("enabling port %s", dev->name);
2353
2354         ret = ehea_up(dev);
2355         if (!ret) {
2356                 port_napi_enable(port);
2357                 netif_start_queue(dev);
2358         }
2359
2360         up(&port->port_lock);
2361
2362         return ret;
2363 }
2364
2365 static int ehea_down(struct net_device *dev)
2366 {
2367         int ret;
2368         struct ehea_port *port = netdev_priv(dev);
2369
2370         if (port->state == EHEA_PORT_DOWN)
2371                 return 0;
2372
2373         ehea_drop_multicast_list(dev);
2374         ehea_free_interrupts(dev);
2375
2376         port->state = EHEA_PORT_DOWN;
2377
2378         ret = ehea_clean_all_portres(port);
2379         if (ret)
2380                 ehea_info("Failed freeing resources for %s. ret=%i",
2381                           dev->name, ret);
2382
2383         return ret;
2384 }
2385
2386 static int ehea_stop(struct net_device *dev)
2387 {
2388         int ret;
2389         struct ehea_port *port = netdev_priv(dev);
2390
2391         if (netif_msg_ifdown(port))
2392                 ehea_info("disabling port %s", dev->name);
2393
2394         flush_scheduled_work();
2395         down(&port->port_lock);
2396         netif_stop_queue(dev);
2397         port_napi_disable(port);
2398         ret = ehea_down(dev);
2399         up(&port->port_lock);
2400         return ret;
2401 }
2402
2403 void ehea_purge_sq(struct ehea_qp *orig_qp)
2404 {
2405         struct ehea_qp qp = *orig_qp;
2406         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2407         struct ehea_swqe *swqe;
2408         int wqe_index;
2409         int i;
2410
2411         for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2412                 swqe = ehea_get_swqe(&qp, &wqe_index);
2413                 swqe->tx_control |= EHEA_SWQE_PURGE;
2414         }
2415 }
2416
2417 int ehea_stop_qps(struct net_device *dev)
2418 {
2419         struct ehea_port *port = netdev_priv(dev);
2420         struct ehea_adapter *adapter = port->adapter;
2421         struct hcp_modify_qp_cb0* cb0;
2422         int ret = -EIO;
2423         int dret;
2424         int i;
2425         u64 hret;
2426         u64 dummy64 = 0;
2427         u16 dummy16 = 0;
2428
2429         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2430         if (!cb0) {
2431                 ret = -ENOMEM;
2432                 goto out;
2433         }
2434
2435         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2436                 struct ehea_port_res *pr =  &port->port_res[i];
2437                 struct ehea_qp *qp = pr->qp;
2438
2439                 /* Purge send queue */
2440                 ehea_purge_sq(qp);
2441
2442                 /* Disable queue pair */
2443                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2444                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2445                                             cb0);
2446                 if (hret != H_SUCCESS) {
2447                         ehea_error("query_ehea_qp failed (1)");
2448                         goto out;
2449                 }
2450
2451                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2452                 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2453
2454                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2455                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2456                                                             1), cb0, &dummy64,
2457                                              &dummy64, &dummy16, &dummy16);
2458                 if (hret != H_SUCCESS) {
2459                         ehea_error("modify_ehea_qp failed (1)");
2460                         goto out;
2461                 }
2462
2463                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2464                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2465                                             cb0);
2466                 if (hret != H_SUCCESS) {
2467                         ehea_error("query_ehea_qp failed (2)");
2468                         goto out;
2469                 }
2470
2471                 /* deregister shared memory regions */
2472                 dret = ehea_rem_smrs(pr);
2473                 if (dret) {
2474                         ehea_error("unreg shared memory region failed");
2475                         goto out;
2476                 }
2477         }
2478
2479         ret = 0;
2480 out:
2481         kfree(cb0);
2482
2483         return ret;
2484 }
2485
2486 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res * pr)
2487 {
2488         struct ehea_qp qp = *orig_qp;
2489         struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2490         struct ehea_rwqe *rwqe;
2491         struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2492         struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2493         struct sk_buff *skb;
2494         u32 lkey = pr->recv_mr.lkey;
2495
2496
2497         int i;
2498         int index;
2499
2500         for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2501                 rwqe = ehea_get_next_rwqe(&qp, 2);
2502                 rwqe->sg_list[0].l_key = lkey;
2503                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2504                 skb = skba_rq2[index];
2505                 if (skb)
2506                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2507         }
2508
2509         for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2510                 rwqe = ehea_get_next_rwqe(&qp, 3);
2511                 rwqe->sg_list[0].l_key = lkey;
2512                 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2513                 skb = skba_rq3[index];
2514                 if (skb)
2515                         rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2516         }
2517 }
2518
2519 int ehea_restart_qps(struct net_device *dev)
2520 {
2521         struct ehea_port *port = netdev_priv(dev);
2522         struct ehea_adapter *adapter = port->adapter;
2523         int ret = 0;
2524         int i;
2525
2526         struct hcp_modify_qp_cb0* cb0;
2527         u64 hret;
2528         u64 dummy64 = 0;
2529         u16 dummy16 = 0;
2530
2531         cb0 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2532         if (!cb0) {
2533                 ret = -ENOMEM;
2534                 goto out;
2535         }
2536
2537         for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
2538                 struct ehea_port_res *pr =  &port->port_res[i];
2539                 struct ehea_qp *qp = pr->qp;
2540
2541                 ret = ehea_gen_smrs(pr);
2542                 if (ret) {
2543                         ehea_error("creation of shared memory regions failed");
2544                         goto out;
2545                 }
2546
2547                 ehea_update_rqs(qp, pr);
2548
2549                 /* Enable queue pair */
2550                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2551                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2552                                             cb0);
2553                 if (hret != H_SUCCESS) {
2554                         ehea_error("query_ehea_qp failed (1)");
2555                         goto out;
2556                 }
2557
2558                 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2559                 cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2560
2561                 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2562                                              EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2563                                                             1), cb0, &dummy64,
2564                                              &dummy64, &dummy16, &dummy16);
2565                 if (hret != H_SUCCESS) {
2566                         ehea_error("modify_ehea_qp failed (1)");
2567                         goto out;
2568                 }
2569
2570                 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2571                                             EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2572                                             cb0);
2573                 if (hret != H_SUCCESS) {
2574                         ehea_error("query_ehea_qp failed (2)");
2575                         goto out;
2576                 }
2577
2578                 /* refill entire queue */
2579                 ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2580                 ehea_refill_rq2(pr, 0);
2581                 ehea_refill_rq3(pr, 0);
2582         }
2583 out:
2584         kfree(cb0);
2585
2586         return ret;
2587 }
2588
2589 static void ehea_reset_port(struct work_struct *work)
2590 {
2591         int ret;
2592         struct ehea_port *port =
2593                 container_of(work, struct ehea_port, reset_task);
2594         struct net_device *dev = port->netdev;
2595
2596         port->resets++;
2597         down(&port->port_lock);
2598         netif_stop_queue(dev);
2599
2600         port_napi_disable(port);
2601
2602         ehea_down(dev);
2603
2604         ret = ehea_up(dev);
2605         if (ret)
2606                 goto out;
2607
2608         ehea_set_multicast_list(dev);
2609
2610         if (netif_msg_timer(port))
2611                 ehea_info("Device %s resetted successfully", dev->name);
2612
2613         port_napi_enable(port);
2614
2615         netif_wake_queue(dev);
2616 out:
2617         up(&port->port_lock);
2618         return;
2619 }
2620
2621 static void ehea_rereg_mrs(struct work_struct *work)
2622 {
2623         int ret, i;
2624         struct ehea_adapter *adapter;
2625
2626         down(&dlpar_mem_lock);
2627         ehea_info("LPAR memory enlarged - re-initializing driver");
2628
2629         list_for_each_entry(adapter, &adapter_list, list)
2630                 if (adapter->active_ports) {
2631                         /* Shutdown all ports */
2632                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2633                                 struct ehea_port *port = adapter->port[i];
2634
2635                                 if (port) {
2636                                         struct net_device *dev = port->netdev;
2637
2638                                         if (dev->flags & IFF_UP) {
2639                                                 down(&port->port_lock);
2640                                                 netif_stop_queue(dev);
2641                                                 ret = ehea_stop_qps(dev);
2642                                                 if (ret) {
2643                                                         up(&port->port_lock);
2644                                                         goto out;
2645                                                 }
2646                                                 port_napi_disable(port);
2647                                                 up(&port->port_lock);
2648                                         }
2649                                 }
2650                         }
2651
2652                         /* Unregister old memory region */
2653                         ret = ehea_rem_mr(&adapter->mr);
2654                         if (ret) {
2655                                 ehea_error("unregister MR failed - driver"
2656                                            " inoperable!");
2657                                 goto out;
2658                         }
2659                 }
2660
2661         ehea_destroy_busmap();
2662         ret = ehea_create_busmap();
2663         if (ret) {
2664                 ehea_error("creating ehea busmap failed");
2665                 goto out;
2666         }
2667
2668         clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2669
2670         list_for_each_entry(adapter, &adapter_list, list)
2671                 if (adapter->active_ports) {
2672                         /* Register new memory region */
2673                         ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2674                         if (ret) {
2675                                 ehea_error("register MR failed - driver"
2676                                            " inoperable!");
2677                                 goto out;
2678                         }
2679
2680                         /* Restart all ports */
2681                         for (i = 0; i < EHEA_MAX_PORTS; i++) {
2682                                 struct ehea_port *port = adapter->port[i];
2683
2684                                 if (port) {
2685                                         struct net_device *dev = port->netdev;
2686
2687                                         if (dev->flags & IFF_UP) {
2688                                                 down(&port->port_lock);
2689                                                 port_napi_enable(port);
2690                                                 ret = ehea_restart_qps(dev);
2691                                                 if (!ret)
2692                                                         netif_wake_queue(dev);
2693                                                 up(&port->port_lock);
2694                                         }
2695                                 }
2696                         }
2697                 }
2698        up(&dlpar_mem_lock);
2699        ehea_info("re-initializing driver complete");
2700 out:
2701         return;
2702 }
2703
2704 static void ehea_tx_watchdog(struct net_device *dev)
2705 {
2706         struct ehea_port *port = netdev_priv(dev);
2707
2708         if (netif_carrier_ok(dev) &&
2709             !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2710                 schedule_work(&port->reset_task);
2711 }
2712
2713 int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2714 {
2715         struct hcp_query_ehea *cb;
2716         u64 hret;
2717         int ret;
2718
2719         cb = kzalloc(PAGE_SIZE, GFP_KERNEL);
2720         if (!cb) {
2721                 ret = -ENOMEM;
2722                 goto out;
2723         }
2724
2725         hret = ehea_h_query_ehea(adapter->handle, cb);
2726
2727         if (hret != H_SUCCESS) {
2728                 ret = -EIO;
2729                 goto out_herr;
2730         }
2731
2732         adapter->max_mc_mac = cb->max_mc_mac - 1;
2733         ret = 0;
2734
2735 out_herr:
2736         kfree(cb);
2737 out:
2738         return ret;
2739 }
2740
2741 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2742 {
2743         struct hcp_ehea_port_cb4 *cb4;
2744         u64 hret;
2745         int ret = 0;
2746
2747         *jumbo = 0;
2748
2749         /* (Try to) enable *jumbo frames */
2750         cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
2751         if (!cb4) {
2752                 ehea_error("no mem for cb4");
2753                 ret = -ENOMEM;
2754                 goto out;
2755         } else {
2756                 hret = ehea_h_query_ehea_port(port->adapter->handle,
2757                                               port->logical_port_id,
2758                                               H_PORT_CB4,
2759                                               H_PORT_CB4_JUMBO, cb4);
2760                 if (hret == H_SUCCESS) {
2761                         if (cb4->jumbo_frame)
2762                                 *jumbo = 1;
2763                         else {
2764                                 cb4->jumbo_frame = 1;
2765                                 hret = ehea_h_modify_ehea_port(port->adapter->
2766                                                                handle,
2767                                                                port->
2768                                                                logical_port_id,
2769                                                                H_PORT_CB4,
2770                                                                H_PORT_CB4_JUMBO,
2771                                                                cb4);
2772                                 if (hret == H_SUCCESS)
2773                                         *jumbo = 1;
2774                         }
2775                 } else
2776                         ret = -EINVAL;
2777
2778                 kfree(cb4);
2779         }
2780 out:
2781         return ret;
2782 }
2783
2784 static ssize_t ehea_show_port_id(struct device *dev,
2785                                  struct device_attribute *attr, char *buf)
2786 {
2787         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2788         return sprintf(buf, "%d", port->logical_port_id);
2789 }
2790
2791 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2792                    NULL);
2793
2794 static void __devinit logical_port_release(struct device *dev)
2795 {
2796         struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2797         of_node_put(port->ofdev.node);
2798 }
2799
2800 static int ehea_driver_sysfs_add(struct device *dev,
2801                                  struct device_driver *driver)
2802 {
2803         int ret;
2804
2805         ret = sysfs_create_link(&driver->kobj, &dev->kobj,
2806                                 kobject_name(&dev->kobj));
2807         if (ret == 0) {
2808                 ret = sysfs_create_link(&dev->kobj, &driver->kobj,
2809                                         "driver");
2810                 if (ret)
2811                         sysfs_remove_link(&driver->kobj,
2812                                           kobject_name(&dev->kobj));
2813         }
2814         return ret;
2815 }
2816
2817 static void ehea_driver_sysfs_remove(struct device *dev,
2818                                      struct device_driver *driver)
2819 {
2820         struct device_driver *drv = driver;
2821
2822         if (drv) {
2823                 sysfs_remove_link(&drv->kobj, kobject_name(&dev->kobj));
2824                 sysfs_remove_link(&dev->kobj, "driver");
2825         }
2826 }
2827
2828 static struct device *ehea_register_port(struct ehea_port *port,
2829                                          struct device_node *dn)
2830 {
2831         int ret;
2832
2833         port->ofdev.node = of_node_get(dn);
2834         port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2835         port->ofdev.dev.bus = &ibmebus_bus_type;
2836
2837         sprintf(port->ofdev.dev.bus_id, "port%d", port_name_cnt++);
2838         port->ofdev.dev.release = logical_port_release;
2839
2840         ret = of_device_register(&port->ofdev);
2841         if (ret) {
2842                 ehea_error("failed to register device. ret=%d", ret);
2843                 goto out;
2844         }
2845
2846         ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2847         if (ret) {
2848                 ehea_error("failed to register attributes, ret=%d", ret);
2849                 goto out_unreg_of_dev;
2850         }
2851
2852         ret = ehea_driver_sysfs_add(&port->ofdev.dev, &ehea_driver.driver);
2853         if (ret) {
2854                 ehea_error("failed to register sysfs driver link");
2855                 goto out_rem_dev_file;
2856         }
2857
2858         return &port->ofdev.dev;
2859
2860 out_rem_dev_file:
2861         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2862 out_unreg_of_dev:
2863         of_device_unregister(&port->ofdev);
2864 out:
2865         return NULL;
2866 }
2867
2868 static void ehea_unregister_port(struct ehea_port *port)
2869 {
2870         ehea_driver_sysfs_remove(&port->ofdev.dev, &ehea_driver.driver);
2871         device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2872         of_device_unregister(&port->ofdev);
2873 }
2874
2875 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2876                                          u32 logical_port_id,
2877                                          struct device_node *dn)
2878 {
2879         int ret;
2880         struct net_device *dev;
2881         struct ehea_port *port;
2882         struct device *port_dev;
2883         int jumbo;
2884
2885         /* allocate memory for the port structures */
2886         dev = alloc_etherdev(sizeof(struct ehea_port));
2887
2888         if (!dev) {
2889                 ehea_error("no mem for net_device");
2890                 ret = -ENOMEM;
2891                 goto out_err;
2892         }
2893
2894         port = netdev_priv(dev);
2895
2896         sema_init(&port->port_lock, 1);
2897         port->state = EHEA_PORT_DOWN;
2898         port->sig_comp_iv = sq_entries / 10;
2899
2900         port->adapter = adapter;
2901         port->netdev = dev;
2902         port->logical_port_id = logical_port_id;
2903
2904         port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2905
2906         port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2907         if (!port->mc_list) {
2908                 ret = -ENOMEM;
2909                 goto out_free_ethdev;
2910         }
2911
2912         INIT_LIST_HEAD(&port->mc_list->list);
2913
2914         ret = ehea_sense_port_attr(port);
2915         if (ret)
2916                 goto out_free_mc_list;
2917
2918         port_dev = ehea_register_port(port, dn);
2919         if (!port_dev)
2920                 goto out_free_mc_list;
2921
2922         SET_NETDEV_DEV(dev, port_dev);
2923
2924         /* initialize net_device structure */
2925         memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
2926
2927         dev->open = ehea_open;
2928 #ifdef CONFIG_NET_POLL_CONTROLLER
2929         dev->poll_controller = ehea_netpoll;
2930 #endif
2931         dev->stop = ehea_stop;
2932         dev->hard_start_xmit = ehea_start_xmit;
2933         dev->get_stats = ehea_get_stats;
2934         dev->set_multicast_list = ehea_set_multicast_list;
2935         dev->set_mac_address = ehea_set_mac_addr;
2936         dev->change_mtu = ehea_change_mtu;
2937         dev->vlan_rx_register = ehea_vlan_rx_register;
2938         dev->vlan_rx_add_vid = ehea_vlan_rx_add_vid;
2939         dev->vlan_rx_kill_vid = ehea_vlan_rx_kill_vid;
2940         dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
2941                       | NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX
2942                       | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
2943                       | NETIF_F_LLTX;
2944         dev->tx_timeout = &ehea_tx_watchdog;
2945         dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
2946
2947         INIT_WORK(&port->reset_task, ehea_reset_port);
2948
2949         ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2950         if (ret) {
2951                 ret = -EIO;
2952                 goto out_unreg_port;
2953         }
2954
2955         ehea_set_ethtool_ops(dev);
2956
2957         ret = register_netdev(dev);
2958         if (ret) {
2959                 ehea_error("register_netdev failed. ret=%d", ret);
2960                 goto out_dereg_bc;
2961         }
2962
2963         port->lro_max_aggr = lro_max_aggr;
2964
2965         ret = ehea_get_jumboframe_status(port, &jumbo);
2966         if (ret)
2967                 ehea_error("failed determining jumbo frame status for %s",
2968                            port->netdev->name);
2969
2970         ehea_info("%s: Jumbo frames are %sabled", dev->name,
2971                   jumbo == 1 ? "en" : "dis");
2972
2973         adapter->active_ports++;
2974
2975         return port;
2976
2977 out_dereg_bc:
2978         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2979
2980 out_unreg_port:
2981         ehea_unregister_port(port);
2982
2983 out_free_mc_list:
2984         kfree(port->mc_list);
2985
2986 out_free_ethdev:
2987         free_netdev(dev);
2988
2989 out_err:
2990         ehea_error("setting up logical port with id=%d failed, ret=%d",
2991                    logical_port_id, ret);
2992         return NULL;
2993 }
2994
2995 static void ehea_shutdown_single_port(struct ehea_port *port)
2996 {
2997         unregister_netdev(port->netdev);
2998         ehea_unregister_port(port);
2999         ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
3000         kfree(port->mc_list);
3001         free_netdev(port->netdev);
3002         port->adapter->active_ports--;
3003 }
3004
3005 static int ehea_setup_ports(struct ehea_adapter *adapter)
3006 {
3007         struct device_node *lhea_dn;
3008         struct device_node *eth_dn = NULL;
3009
3010         const u32 *dn_log_port_id;
3011         int i = 0;
3012
3013         lhea_dn = adapter->ofdev->node;
3014         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3015
3016                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3017                                                  NULL);
3018                 if (!dn_log_port_id) {
3019                         ehea_error("bad device node: eth_dn name=%s",
3020                                    eth_dn->full_name);
3021                         continue;
3022                 }
3023
3024                 if (ehea_add_adapter_mr(adapter)) {
3025                         ehea_error("creating MR failed");
3026                         of_node_put(eth_dn);
3027                         return -EIO;
3028                 }
3029
3030                 adapter->port[i] = ehea_setup_single_port(adapter,
3031                                                           *dn_log_port_id,
3032                                                           eth_dn);
3033                 if (adapter->port[i])
3034                         ehea_info("%s -> logical port id #%d",
3035                                   adapter->port[i]->netdev->name,
3036                                   *dn_log_port_id);
3037                 else
3038                         ehea_remove_adapter_mr(adapter);
3039
3040                 i++;
3041         };
3042
3043         return 0;
3044 }
3045
3046 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3047                                            u32 logical_port_id)
3048 {
3049         struct device_node *lhea_dn;
3050         struct device_node *eth_dn = NULL;
3051         const u32 *dn_log_port_id;
3052
3053         lhea_dn = adapter->ofdev->node;
3054         while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3055
3056                 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3057                                                  NULL);
3058                 if (dn_log_port_id)
3059                         if (*dn_log_port_id == logical_port_id)
3060                                 return eth_dn;
3061         };
3062
3063         return NULL;
3064 }
3065
3066 static ssize_t ehea_probe_port(struct device *dev,
3067                                struct device_attribute *attr,
3068                                const char *buf, size_t count)
3069 {
3070         struct ehea_adapter *adapter = dev->driver_data;
3071         struct ehea_port *port;
3072         struct device_node *eth_dn = NULL;
3073         int i;
3074
3075         u32 logical_port_id;
3076
3077         sscanf(buf, "%d", &logical_port_id);
3078
3079         port = ehea_get_port(adapter, logical_port_id);
3080
3081         if (port) {
3082                 ehea_info("adding port with logical port id=%d failed. port "
3083                           "already configured as %s.", logical_port_id,
3084                           port->netdev->name);
3085                 return -EINVAL;
3086         }
3087
3088         eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3089
3090         if (!eth_dn) {
3091                 ehea_info("no logical port with id %d found", logical_port_id);
3092                 return -EINVAL;
3093         }
3094
3095         if (ehea_add_adapter_mr(adapter)) {
3096                 ehea_error("creating MR failed");
3097                 return -EIO;
3098         }
3099
3100         port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3101
3102         of_node_put(eth_dn);
3103
3104         if (port) {
3105                 for (i=0; i < EHEA_MAX_PORTS; i++)
3106                         if (!adapter->port[i]) {
3107                                 adapter->port[i] = port;
3108                                 break;
3109                         }
3110
3111                 ehea_info("added %s (logical port id=%d)", port->netdev->name,
3112                           logical_port_id);
3113         } else {
3114                 ehea_remove_adapter_mr(adapter);
3115                 return -EIO;
3116         }
3117
3118         return (ssize_t) count;
3119 }
3120
3121 static ssize_t ehea_remove_port(struct device *dev,
3122                                 struct device_attribute *attr,
3123                                 const char *buf, size_t count)
3124 {
3125         struct ehea_adapter *adapter = dev->driver_data;
3126         struct ehea_port *port;
3127         int i;
3128         u32 logical_port_id;
3129
3130         sscanf(buf, "%d", &logical_port_id);
3131
3132         port = ehea_get_port(adapter, logical_port_id);
3133
3134         if (port) {
3135                 ehea_info("removed %s (logical port id=%d)", port->netdev->name,
3136                           logical_port_id);
3137
3138                 ehea_shutdown_single_port(port);
3139
3140                 for (i=0; i < EHEA_MAX_PORTS; i++)
3141                         if (adapter->port[i] == port) {
3142                                 adapter->port[i] = NULL;
3143                                 break;
3144                         }
3145         } else {
3146                 ehea_error("removing port with logical port id=%d failed. port "
3147                            "not configured.", logical_port_id);
3148                 return -EINVAL;
3149         }
3150
3151         ehea_remove_adapter_mr(adapter);
3152
3153         return (ssize_t) count;
3154 }
3155
3156 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3157 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3158
3159 int ehea_create_device_sysfs(struct of_device *dev)
3160 {
3161         int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3162         if (ret)
3163                 goto out;
3164
3165         ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3166 out:
3167         return ret;
3168 }
3169
3170 void ehea_remove_device_sysfs(struct of_device *dev)
3171 {
3172         device_remove_file(&dev->dev, &dev_attr_probe_port);
3173         device_remove_file(&dev->dev, &dev_attr_remove_port);
3174 }
3175
3176 static int __devinit ehea_probe_adapter(struct of_device *dev,
3177                                         const struct of_device_id *id)
3178 {
3179         struct ehea_adapter *adapter;
3180         const u64 *adapter_handle;
3181         int ret;
3182
3183         if (!dev || !dev->node) {
3184                 ehea_error("Invalid ibmebus device probed");
3185                 return -EINVAL;
3186         }
3187
3188         adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3189         if (!adapter) {
3190                 ret = -ENOMEM;
3191                 dev_err(&dev->dev, "no mem for ehea_adapter\n");
3192                 goto out;
3193         }
3194
3195         list_add(&adapter->list, &adapter_list);
3196
3197         adapter->ofdev = dev;
3198
3199         adapter_handle = of_get_property(dev->node, "ibm,hea-handle",
3200                                          NULL);
3201         if (adapter_handle)
3202                 adapter->handle = *adapter_handle;
3203
3204         if (!adapter->handle) {
3205                 dev_err(&dev->dev, "failed getting handle for adapter"
3206                         " '%s'\n", dev->node->full_name);
3207                 ret = -ENODEV;
3208                 goto out_free_ad;
3209         }
3210
3211         adapter->pd = EHEA_PD_ID;
3212
3213         dev->dev.driver_data = adapter;
3214
3215
3216         /* initialize adapter and ports */
3217         /* get adapter properties */
3218         ret = ehea_sense_adapter_attr(adapter);
3219         if (ret) {
3220                 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3221                 goto out_free_ad;
3222         }
3223
3224         adapter->neq = ehea_create_eq(adapter,
3225                                       EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3226         if (!adapter->neq) {
3227                 ret = -EIO;
3228                 dev_err(&dev->dev, "NEQ creation failed\n");
3229                 goto out_free_ad;
3230         }
3231
3232         tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3233                      (unsigned long)adapter);
3234
3235         ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3236                                   ehea_interrupt_neq, IRQF_DISABLED,
3237                                   "ehea_neq", adapter);
3238         if (ret) {
3239                 dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3240                 goto out_kill_eq;
3241         }
3242
3243         ret = ehea_create_device_sysfs(dev);
3244         if (ret)
3245                 goto out_free_irq;
3246
3247         ret = ehea_setup_ports(adapter);
3248         if (ret) {
3249                 dev_err(&dev->dev, "setup_ports failed\n");
3250                 goto out_rem_dev_sysfs;
3251         }
3252
3253         ret = 0;
3254         goto out;
3255
3256 out_rem_dev_sysfs:
3257         ehea_remove_device_sysfs(dev);
3258
3259 out_free_irq:
3260         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3261
3262 out_kill_eq:
3263         ehea_destroy_eq(adapter->neq);
3264
3265 out_free_ad:
3266         kfree(adapter);
3267 out:
3268         return ret;
3269 }
3270
3271 static int __devexit ehea_remove(struct of_device *dev)
3272 {
3273         struct ehea_adapter *adapter = dev->dev.driver_data;
3274         int i;
3275
3276         for (i = 0; i < EHEA_MAX_PORTS; i++)
3277                 if (adapter->port[i]) {
3278                         ehea_shutdown_single_port(adapter->port[i]);
3279                         adapter->port[i] = NULL;
3280                 }
3281
3282         ehea_remove_device_sysfs(dev);
3283
3284         flush_scheduled_work();
3285
3286         ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3287         tasklet_kill(&adapter->neq_tasklet);
3288
3289         ehea_destroy_eq(adapter->neq);
3290         ehea_remove_adapter_mr(adapter);
3291         list_del(&adapter->list);
3292
3293         kfree(adapter);
3294
3295         return 0;
3296 }
3297
3298 static int check_module_parm(void)
3299 {
3300         int ret = 0;
3301
3302         if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3303             (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3304                 ehea_info("Bad parameter: rq1_entries");
3305                 ret = -EINVAL;
3306         }
3307         if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3308             (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3309                 ehea_info("Bad parameter: rq2_entries");
3310                 ret = -EINVAL;
3311         }
3312         if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3313             (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3314                 ehea_info("Bad parameter: rq3_entries");
3315                 ret = -EINVAL;
3316         }
3317         if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3318             (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3319                 ehea_info("Bad parameter: sq_entries");
3320                 ret = -EINVAL;
3321         }
3322
3323         return ret;
3324 }
3325
3326 static ssize_t ehea_show_capabilities(struct device_driver *drv,
3327                                       char *buf)
3328 {
3329         return sprintf(buf, "%d", EHEA_CAPABILITIES);
3330 }
3331
3332 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3333                    ehea_show_capabilities, NULL);
3334
3335 int __init ehea_module_init(void)
3336 {
3337         int ret;
3338
3339         printk(KERN_INFO "IBM eHEA ethernet device driver (Release %s)\n",
3340                DRV_VERSION);
3341
3342
3343         INIT_WORK(&ehea_rereg_mr_task, ehea_rereg_mrs);
3344         sema_init(&dlpar_mem_lock, 1);
3345
3346         ret = check_module_parm();
3347         if (ret)
3348                 goto out;
3349
3350         ret = ehea_create_busmap();
3351         if (ret)
3352                 goto out;
3353
3354         ret = ibmebus_register_driver(&ehea_driver);
3355         if (ret) {
3356                 ehea_error("failed registering eHEA device driver on ebus");
3357                 goto out;
3358         }
3359
3360         ret = driver_create_file(&ehea_driver.driver,
3361                                  &driver_attr_capabilities);
3362         if (ret) {
3363                 ehea_error("failed to register capabilities attribute, ret=%d",
3364                            ret);
3365                 ibmebus_unregister_driver(&ehea_driver);
3366                 goto out;
3367         }
3368
3369 out:
3370         return ret;
3371 }
3372
3373 static void __exit ehea_module_exit(void)
3374 {
3375         flush_scheduled_work();
3376         driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3377         ibmebus_unregister_driver(&ehea_driver);
3378         ehea_destroy_busmap();
3379 }
3380
3381 module_init(ehea_module_init);
3382 module_exit(ehea_module_exit);