err.no Git - linux-2.6/blob - drivers/net/cxgb3/cxgb3_offload.c

   1 /*
   2  * Copyright (c) 2006-2007 Chelsio, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/list.h>
  34 #include <net/neighbour.h>
  35 #include <linux/notifier.h>
  36 #include <asm/atomic.h>
  37 #include <linux/proc_fs.h>
  38 #include <linux/if_vlan.h>
  39 #include <net/netevent.h>
  40 #include <linux/highmem.h>
  41 #include <linux/vmalloc.h>
  42
  43 #include "common.h"
  44 #include "regs.h"
  45 #include "cxgb3_ioctl.h"
  46 #include "cxgb3_ctl_defs.h"
  47 #include "cxgb3_defs.h"
  48 #include "l2t.h"
  49 #include "firmware_exports.h"
  50 #include "cxgb3_offload.h"
  51
  52 static LIST_HEAD(client_list);
  53 static LIST_HEAD(ofld_dev_list);
  54 static DEFINE_MUTEX(cxgb3_db_lock);
  55
  56 static DEFINE_RWLOCK(adapter_list_lock);
  57 static LIST_HEAD(adapter_list);
  58
  59 static const unsigned int MAX_ATIDS = 64 * 1024;
  60 static const unsigned int ATID_BASE = 0x10000;
  61
  62 static inline int offload_activated(struct t3cdev *tdev)
  63 {
  64         const struct adapter *adapter = tdev2adap(tdev);
  65
  66         return (test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map));
  67 }
  68
  69 /**
  70  *      cxgb3_register_client - register an offload client
  71  *      @client: the client
  72  *
  73  *      Add the client to the client list,
  74  *      and call backs the client for each activated offload device
  75  */
  76 void cxgb3_register_client(struct cxgb3_client *client)
  77 {
  78         struct t3cdev *tdev;
  79
  80         mutex_lock(&cxgb3_db_lock);
  81         list_add_tail(&client->client_list, &client_list);
  82
  83         if (client->add) {
  84                 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
  85                         if (offload_activated(tdev))
  86                                 client->add(tdev);
  87                 }
  88         }
  89         mutex_unlock(&cxgb3_db_lock);
  90 }
  91
  92 EXPORT_SYMBOL(cxgb3_register_client);
  93
  94 /**
  95  *      cxgb3_unregister_client - unregister an offload client
  96  *      @client: the client
  97  *
  98  *      Remove the client to the client list,
  99  *      and call backs the client for each activated offload device.
 100  */
 101 void cxgb3_unregister_client(struct cxgb3_client *client)
 102 {
 103         struct t3cdev *tdev;
 104
 105         mutex_lock(&cxgb3_db_lock);
 106         list_del(&client->client_list);
 107
 108         if (client->remove) {
 109                 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
 110                         if (offload_activated(tdev))
 111                                 client->remove(tdev);
 112                 }
 113         }
 114         mutex_unlock(&cxgb3_db_lock);
 115 }
 116
 117 EXPORT_SYMBOL(cxgb3_unregister_client);
 118
 119 /**
 120  *      cxgb3_add_clients - activate registered clients for an offload device
 121  *      @tdev: the offload device
 122  *
 123  *      Call backs all registered clients once a offload device is activated
 124  */
 125 void cxgb3_add_clients(struct t3cdev *tdev)
 126 {
 127         struct cxgb3_client *client;
 128
 129         mutex_lock(&cxgb3_db_lock);
 130         list_for_each_entry(client, &client_list, client_list) {
 131                 if (client->add)
 132                         client->add(tdev);
 133         }
 134         mutex_unlock(&cxgb3_db_lock);
 135 }
 136
 137 /**
 138  *      cxgb3_remove_clients - deactivates registered clients
 139  *                             for an offload device
 140  *      @tdev: the offload device
 141  *
 142  *      Call backs all registered clients once a offload device is deactivated
 143  */
 144 void cxgb3_remove_clients(struct t3cdev *tdev)
 145 {
 146         struct cxgb3_client *client;
 147
 148         mutex_lock(&cxgb3_db_lock);
 149         list_for_each_entry(client, &client_list, client_list) {
 150                 if (client->remove)
 151                         client->remove(tdev);
 152         }
 153         mutex_unlock(&cxgb3_db_lock);
 154 }
 155
 156 static struct net_device *get_iff_from_mac(struct adapter *adapter,
 157                                            const unsigned char *mac,
 158                                            unsigned int vlan)
 159 {
 160         int i;
 161
 162         for_each_port(adapter, i) {
 163                 struct vlan_group *grp;
 164                 struct net_device *dev = adapter->port[i];
 165                 const struct port_info *p = netdev_priv(dev);
 166
 167                 if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) {
 168                         if (vlan && vlan != VLAN_VID_MASK) {
 169                                 grp = p->vlan_grp;
 170                                 dev = NULL;
 171                                 if (grp)
 172                                         dev = vlan_group_get_device(grp, vlan);
 173                         } else
 174                                 while (dev->master)
 175                                         dev = dev->master;
 176                         return dev;
 177                 }
 178         }
 179         return NULL;
 180 }
 181
 182 static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
 183                               void *data)
 184 {
 185         int ret = 0;
 186         struct ulp_iscsi_info *uiip = data;
 187
 188         switch (req) {
 189         case ULP_ISCSI_GET_PARAMS:
 190                 uiip->pdev = adapter->pdev;
 191                 uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
 192                 uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
 193                 uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
 194                 /*
 195                  * On tx, the iscsi pdu has to be <= tx page size and has to
 196                  * fit into the Tx PM FIFO.
 197                  */
 198                 uiip->max_txsz = min(adapter->params.tp.tx_pg_size,
 199                                      t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
 200                 /* on rx, the iscsi pdu has to be < rx page size and the
 201                    whole pdu + cpl headers has to fit into one sge buffer */
 202                 uiip->max_rxsz = min_t(unsigned int,
 203                                        adapter->params.tp.rx_pg_size,
 204                                        (adapter->sge.qs[0].fl[1].buf_size -
 205                                         sizeof(struct cpl_rx_data) * 2 -
 206                                         sizeof(struct cpl_rx_data_ddp)));
 207                 break;
 208         case ULP_ISCSI_SET_PARAMS:
 209                 t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
 210                 /* set MaxRxData and MaxCoalesceSize to 16224 */
 211                 t3_write_reg(adapter, A_TP_PARA_REG2, 0x3f603f60);
 212                 /* program the ddp page sizes */
 213                 {
 214                         int i;
 215                         unsigned int val = 0;
 216                         for (i = 0; i < 4; i++)
 217                                 val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
 218                         if (val)
 219                                 t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
 220                 }
 221                 break;
 222         default:
 223                 ret = -EOPNOTSUPP;
 224         }
 225         return ret;
 226 }
 227
 228 /* Response queue used for RDMA events. */
 229 #define ASYNC_NOTIF_RSPQ 0
 230
 231 static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
 232 {
 233         int ret = 0;
 234
 235         switch (req) {
 236         case RDMA_GET_PARAMS: {
 237                 struct rdma_info *rdma = data;
 238                 struct pci_dev *pdev = adapter->pdev;
 239
 240                 rdma->udbell_physbase = pci_resource_start(pdev, 2);
 241                 rdma->udbell_len = pci_resource_len(pdev, 2);
 242                 rdma->tpt_base =
 243                         t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
 244                 rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
 245                 rdma->pbl_base =
 246                         t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
 247                 rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
 248                 rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
 249                 rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
 250                 rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
 251                 rdma->pdev = pdev;
 252                 break;
 253         }
 254         case RDMA_CQ_OP:{
 255                 unsigned long flags;
 256                 struct rdma_cq_op *rdma = data;
 257
 258                 /* may be called in any context */
 259                 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
 260                 ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
 261                                         rdma->credits);
 262                 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
 263                 break;
 264         }
 265         case RDMA_GET_MEM:{
 266                 struct ch_mem_range *t = data;
 267                 struct mc7 *mem;
 268
 269                 if ((t->addr & 7) || (t->len & 7))
 270                         return -EINVAL;
 271                 if (t->mem_id == MEM_CM)
 272                         mem = &adapter->cm;
 273                 else if (t->mem_id == MEM_PMRX)
 274                         mem = &adapter->pmrx;
 275                 else if (t->mem_id == MEM_PMTX)
 276                         mem = &adapter->pmtx;
 277                 else
 278                         return -EINVAL;
 279
 280                 ret =
 281                         t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
 282                                         (u64 *) t->buf);
 283                 if (ret)
 284                         return ret;
 285                 break;
 286         }
 287         case RDMA_CQ_SETUP:{
 288                 struct rdma_cq_setup *rdma = data;
 289
 290                 spin_lock_irq(&adapter->sge.reg_lock);
 291                 ret =
 292                         t3_sge_init_cqcntxt(adapter, rdma->id,
 293                                         rdma->base_addr, rdma->size,
 294                                         ASYNC_NOTIF_RSPQ,
 295                                         rdma->ovfl_mode, rdma->credits,
 296                                         rdma->credit_thres);
 297                 spin_unlock_irq(&adapter->sge.reg_lock);
 298                 break;
 299         }
 300         case RDMA_CQ_DISABLE:
 301                 spin_lock_irq(&adapter->sge.reg_lock);
 302                 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
 303                 spin_unlock_irq(&adapter->sge.reg_lock);
 304                 break;
 305         case RDMA_CTRL_QP_SETUP:{
 306                 struct rdma_ctrlqp_setup *rdma = data;
 307
 308                 spin_lock_irq(&adapter->sge.reg_lock);
 309                 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
 310                                                 SGE_CNTXT_RDMA,
 311                                                 ASYNC_NOTIF_RSPQ,
 312                                                 rdma->base_addr, rdma->size,
 313                                                 FW_RI_TID_START, 1, 0);
 314                 spin_unlock_irq(&adapter->sge.reg_lock);
 315                 break;
 316         }
 317         default:
 318                 ret = -EOPNOTSUPP;
 319         }
 320         return ret;
 321 }
 322
 323 static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
 324 {
 325         struct adapter *adapter = tdev2adap(tdev);
 326         struct tid_range *tid;
 327         struct mtutab *mtup;
 328         struct iff_mac *iffmacp;
 329         struct ddp_params *ddpp;
 330         struct adap_ports *ports;
 331         struct ofld_page_info *rx_page_info;
 332         struct tp_params *tp = &adapter->params.tp;
 333         int i;
 334
 335         switch (req) {
 336         case GET_MAX_OUTSTANDING_WR:
 337                 *(unsigned int *)data = FW_WR_NUM;
 338                 break;
 339         case GET_WR_LEN:
 340                 *(unsigned int *)data = WR_FLITS;
 341                 break;
 342         case GET_TX_MAX_CHUNK:
 343                 *(unsigned int *)data = 1 << 20;        /* 1MB */
 344                 break;
 345         case GET_TID_RANGE:
 346                 tid = data;
 347                 tid->num = t3_mc5_size(&adapter->mc5) -
 348                     adapter->params.mc5.nroutes -
 349                     adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
 350                 tid->base = 0;
 351                 break;
 352         case GET_STID_RANGE:
 353                 tid = data;
 354                 tid->num = adapter->params.mc5.nservers;
 355                 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
 356                     adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
 357                 break;
 358         case GET_L2T_CAPACITY:
 359                 *(unsigned int *)data = 2048;
 360                 break;
 361         case GET_MTUS:
 362                 mtup = data;
 363                 mtup->size = NMTUS;
 364                 mtup->mtus = adapter->params.mtus;
 365                 break;
 366         case GET_IFF_FROM_MAC:
 367                 iffmacp = data;
 368                 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
 369                                                 iffmacp->vlan_tag &
 370                                                 VLAN_VID_MASK);
 371                 break;
 372         case GET_DDP_PARAMS:
 373                 ddpp = data;
 374                 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
 375                 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
 376                 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
 377                 break;
 378         case GET_PORTS:
 379                 ports = data;
 380                 ports->nports = adapter->params.nports;
 381                 for_each_port(adapter, i)
 382                         ports->lldevs[i] = adapter->port[i];
 383                 break;
 384         case ULP_ISCSI_GET_PARAMS:
 385         case ULP_ISCSI_SET_PARAMS:
 386                 if (!offload_running(adapter))
 387                         return -EAGAIN;
 388                 return cxgb_ulp_iscsi_ctl(adapter, req, data);
 389         case RDMA_GET_PARAMS:
 390         case RDMA_CQ_OP:
 391         case RDMA_CQ_SETUP:
 392         case RDMA_CQ_DISABLE:
 393         case RDMA_CTRL_QP_SETUP:
 394         case RDMA_GET_MEM:
 395                 if (!offload_running(adapter))
 396                         return -EAGAIN;
 397                 return cxgb_rdma_ctl(adapter, req, data);
 398         case GET_RX_PAGE_INFO:
 399                 rx_page_info = data;
 400                 rx_page_info->page_size = tp->rx_pg_size;
 401                 rx_page_info->num = tp->rx_num_pgs;
 402                 break;
 403         default:
 404                 return -EOPNOTSUPP;
 405         }
 406         return 0;
 407 }
 408
 409 /*
 410  * Dummy handler for Rx offload packets in case we get an offload packet before
 411  * proper processing is setup.  This complains and drops the packet as it isn't
 412  * normal to get offload packets at this stage.
 413  */
 414 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
 415                                 int n)
 416 {
 417         while (n--)
 418                 dev_kfree_skb_any(skbs[n]);
 419         return 0;
 420 }
 421
 422 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
 423 {
 424 }
 425
 426 void cxgb3_set_dummy_ops(struct t3cdev *dev)
 427 {
 428         dev->recv = rx_offload_blackhole;
 429         dev->neigh_update = dummy_neigh_update;
 430 }
 431
 432 /*
 433  * Free an active-open TID.
 434  */
 435 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
 436 {
 437         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 438         union active_open_entry *p = atid2entry(t, atid);
 439         void *ctx = p->t3c_tid.ctx;
 440
 441         spin_lock_bh(&t->atid_lock);
 442         p->next = t->afree;
 443         t->afree = p;
 444         t->atids_in_use--;
 445         spin_unlock_bh(&t->atid_lock);
 446
 447         return ctx;
 448 }
 449
 450 EXPORT_SYMBOL(cxgb3_free_atid);
 451
 452 /*
 453  * Free a server TID and return it to the free pool.
 454  */
 455 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
 456 {
 457         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 458         union listen_entry *p = stid2entry(t, stid);
 459
 460         spin_lock_bh(&t->stid_lock);
 461         p->next = t->sfree;
 462         t->sfree = p;
 463         t->stids_in_use--;
 464         spin_unlock_bh(&t->stid_lock);
 465 }
 466
 467 EXPORT_SYMBOL(cxgb3_free_stid);
 468
 469 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
 470                       void *ctx, unsigned int tid)
 471 {
 472         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 473
 474         t->tid_tab[tid].client = client;
 475         t->tid_tab[tid].ctx = ctx;
 476         atomic_inc(&t->tids_in_use);
 477 }
 478
 479 EXPORT_SYMBOL(cxgb3_insert_tid);
 480
 481 /*
 482  * Populate a TID_RELEASE WR.  The skb must be already propely sized.
 483  */
 484 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
 485 {
 486         struct cpl_tid_release *req;
 487
 488         skb->priority = CPL_PRIORITY_SETUP;
 489         req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
 490         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
 491         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
 492 }
 493
 494 static void t3_process_tid_release_list(struct work_struct *work)
 495 {
 496         struct t3c_data *td = container_of(work, struct t3c_data,
 497                                            tid_release_task);
 498         struct sk_buff *skb;
 499         struct t3cdev *tdev = td->dev;
 500
 501
 502         spin_lock_bh(&td->tid_release_lock);
 503         while (td->tid_release_list) {
 504                 struct t3c_tid_entry *p = td->tid_release_list;
 505
 506                 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
 507                 spin_unlock_bh(&td->tid_release_lock);
 508
 509                 skb = alloc_skb(sizeof(struct cpl_tid_release),
 510                                 GFP_KERNEL | __GFP_NOFAIL);
 511                 mk_tid_release(skb, p - td->tid_maps.tid_tab);
 512                 cxgb3_ofld_send(tdev, skb);
 513                 p->ctx = NULL;
 514                 spin_lock_bh(&td->tid_release_lock);
 515         }
 516         spin_unlock_bh(&td->tid_release_lock);
 517 }
 518
 519 /* use ctx as a next pointer in the tid release list */
 520 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
 521 {
 522         struct t3c_data *td = T3C_DATA(tdev);
 523         struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
 524
 525         spin_lock_bh(&td->tid_release_lock);
 526         p->ctx = (void *)td->tid_release_list;
 527         p->client = NULL;
 528         td->tid_release_list = p;
 529         if (!p->ctx)
 530                 schedule_work(&td->tid_release_task);
 531         spin_unlock_bh(&td->tid_release_lock);
 532 }
 533
 534 EXPORT_SYMBOL(cxgb3_queue_tid_release);
 535
 536 /*
 537  * Remove a tid from the TID table.  A client may defer processing its last
 538  * CPL message if it is locked at the time it arrives, and while the message
 539  * sits in the client's backlog the TID may be reused for another connection.
 540  * To handle this we atomically switch the TID association if it still points
 541  * to the original client context.
 542  */
 543 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
 544 {
 545         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 546
 547         BUG_ON(tid >= t->ntids);
 548         if (tdev->type == T3A)
 549                 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
 550         else {
 551                 struct sk_buff *skb;
 552
 553                 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
 554                 if (likely(skb)) {
 555                         mk_tid_release(skb, tid);
 556                         cxgb3_ofld_send(tdev, skb);
 557                         t->tid_tab[tid].ctx = NULL;
 558                 } else
 559                         cxgb3_queue_tid_release(tdev, tid);
 560         }
 561         atomic_dec(&t->tids_in_use);
 562 }
 563
 564 EXPORT_SYMBOL(cxgb3_remove_tid);
 565
 566 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
 567                      void *ctx)
 568 {
 569         int atid = -1;
 570         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 571
 572         spin_lock_bh(&t->atid_lock);
 573         if (t->afree &&
 574             t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
 575             t->ntids) {
 576                 union active_open_entry *p = t->afree;
 577
 578                 atid = (p - t->atid_tab) + t->atid_base;
 579                 t->afree = p->next;
 580                 p->t3c_tid.ctx = ctx;
 581                 p->t3c_tid.client = client;
 582                 t->atids_in_use++;
 583         }
 584         spin_unlock_bh(&t->atid_lock);
 585         return atid;
 586 }
 587
 588 EXPORT_SYMBOL(cxgb3_alloc_atid);
 589
 590 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
 591                      void *ctx)
 592 {
 593         int stid = -1;
 594         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 595
 596         spin_lock_bh(&t->stid_lock);
 597         if (t->sfree) {
 598                 union listen_entry *p = t->sfree;
 599
 600                 stid = (p - t->stid_tab) + t->stid_base;
 601                 t->sfree = p->next;
 602                 p->t3c_tid.ctx = ctx;
 603                 p->t3c_tid.client = client;
 604                 t->stids_in_use++;
 605         }
 606         spin_unlock_bh(&t->stid_lock);
 607         return stid;
 608 }
 609
 610 EXPORT_SYMBOL(cxgb3_alloc_stid);
 611
 612 /* Get the t3cdev associated with a net_device */
 613 struct t3cdev *dev2t3cdev(struct net_device *dev)
 614 {
 615         const struct port_info *pi = netdev_priv(dev);
 616
 617         return (struct t3cdev *)pi->adapter;
 618 }
 619
 620 EXPORT_SYMBOL(dev2t3cdev);
 621
 622 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 623 {
 624         struct cpl_smt_write_rpl *rpl = cplhdr(skb);
 625
 626         if (rpl->status != CPL_ERR_NONE)
 627                 printk(KERN_ERR
 628                        "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
 629                        rpl->status, GET_TID(rpl));
 630
 631         return CPL_RET_BUF_DONE;
 632 }
 633
 634 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 635 {
 636         struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
 637
 638         if (rpl->status != CPL_ERR_NONE)
 639                 printk(KERN_ERR
 640                        "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
 641                        rpl->status, GET_TID(rpl));
 642
 643         return CPL_RET_BUF_DONE;
 644 }
 645
 646 static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 647 {
 648         struct cpl_rte_write_rpl *rpl = cplhdr(skb);
 649
 650         if (rpl->status != CPL_ERR_NONE)
 651                 printk(KERN_ERR
 652                        "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
 653                        rpl->status, GET_TID(rpl));
 654
 655         return CPL_RET_BUF_DONE;
 656 }
 657
 658 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
 659 {
 660         struct cpl_act_open_rpl *rpl = cplhdr(skb);
 661         unsigned int atid = G_TID(ntohl(rpl->atid));
 662         struct t3c_tid_entry *t3c_tid;
 663
 664         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
 665         if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
 666             t3c_tid->client->handlers &&
 667             t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
 668                 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
 669                                                                     t3c_tid->
 670                                                                     ctx);
 671         } else {
 672                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 673                        dev->name, CPL_ACT_OPEN_RPL);
 674                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 675         }
 676 }
 677
 678 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 679 {
 680         union opcode_tid *p = cplhdr(skb);
 681         unsigned int stid = G_TID(ntohl(p->opcode_tid));
 682         struct t3c_tid_entry *t3c_tid;
 683
 684         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
 685         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 686             t3c_tid->client->handlers[p->opcode]) {
 687                 return t3c_tid->client->handlers[p->opcode] (dev, skb,
 688                                                              t3c_tid->ctx);
 689         } else {
 690                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 691                        dev->name, p->opcode);
 692                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 693         }
 694 }
 695
 696 static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 697 {
 698         union opcode_tid *p = cplhdr(skb);
 699         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 700         struct t3c_tid_entry *t3c_tid;
 701
 702         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 703         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 704             t3c_tid->client->handlers[p->opcode]) {
 705                 return t3c_tid->client->handlers[p->opcode]
 706                     (dev, skb, t3c_tid->ctx);
 707         } else {
 708                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 709                        dev->name, p->opcode);
 710                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 711         }
 712 }
 713
 714 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
 715 {
 716         struct cpl_pass_accept_req *req = cplhdr(skb);
 717         unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 718         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 719         struct t3c_tid_entry *t3c_tid;
 720         unsigned int tid = GET_TID(req);
 721
 722         if (unlikely(tid >= t->ntids)) {
 723                 printk("%s: passive open TID %u too large\n",
 724                        dev->name, tid);
 725                 t3_fatal_err(tdev2adap(dev));
 726                 return CPL_RET_BUF_DONE;
 727         }
 728
 729         t3c_tid = lookup_stid(t, stid);
 730         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 731             t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
 732                 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
 733                     (dev, skb, t3c_tid->ctx);
 734         } else {
 735                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 736                        dev->name, CPL_PASS_ACCEPT_REQ);
 737                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 738         }
 739 }
 740
 741 /*
 742  * Returns an sk_buff for a reply CPL message of size len.  If the input
 743  * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
 744  * is allocated.  The input skb must be of size at least len.  Note that this
 745  * operation does not destroy the original skb data even if it decides to reuse
 746  * the buffer.
 747  */
 748 static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
 749                                                gfp_t gfp)
 750 {
 751         if (likely(!skb_cloned(skb))) {
 752                 BUG_ON(skb->len < len);
 753                 __skb_trim(skb, len);
 754                 skb_get(skb);
 755         } else {
 756                 skb = alloc_skb(len, gfp);
 757                 if (skb)
 758                         __skb_put(skb, len);
 759         }
 760         return skb;
 761 }
 762
 763 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
 764 {
 765         union opcode_tid *p = cplhdr(skb);
 766         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 767         struct t3c_tid_entry *t3c_tid;
 768
 769         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 770         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 771             t3c_tid->client->handlers[p->opcode]) {
 772                 return t3c_tid->client->handlers[p->opcode]
 773                     (dev, skb, t3c_tid->ctx);
 774         } else {
 775                 struct cpl_abort_req_rss *req = cplhdr(skb);
 776                 struct cpl_abort_rpl *rpl;
 777                 struct sk_buff *reply_skb;
 778                 unsigned int tid = GET_TID(req);
 779                 u8 cmd = req->status;
 780
 781                 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
 782                     req->status == CPL_ERR_PERSIST_NEG_ADVICE)
 783                         goto out;
 784
 785                 reply_skb = cxgb3_get_cpl_reply_skb(skb,
 786                                                     sizeof(struct
 787                                                            cpl_abort_rpl),
 788                                                     GFP_ATOMIC);
 789
 790                 if (!reply_skb) {
 791                         printk("do_abort_req_rss: couldn't get skb!\n");
 792                         goto out;
 793                 }
 794                 reply_skb->priority = CPL_PRIORITY_DATA;
 795                 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
 796                 rpl = cplhdr(reply_skb);
 797                 rpl->wr.wr_hi =
 798                     htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
 799                 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
 800                 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
 801                 rpl->cmd = cmd;
 802                 cxgb3_ofld_send(dev, reply_skb);
 803 out:
 804                 return CPL_RET_BUF_DONE;
 805         }
 806 }
 807
 808 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
 809 {
 810         struct cpl_act_establish *req = cplhdr(skb);
 811         unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 812         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 813         struct t3c_tid_entry *t3c_tid;
 814         unsigned int tid = GET_TID(req);
 815
 816         if (unlikely(tid >= t->ntids)) {
 817                 printk("%s: active establish TID %u too large\n",
 818                        dev->name, tid);
 819                 t3_fatal_err(tdev2adap(dev));
 820                 return CPL_RET_BUF_DONE;
 821         }
 822
 823         t3c_tid = lookup_atid(t, atid);
 824         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 825             t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
 826                 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
 827                     (dev, skb, t3c_tid->ctx);
 828         } else {
 829                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 830                        dev->name, CPL_ACT_ESTABLISH);
 831                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 832         }
 833 }
 834
 835 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
 836 {
 837         struct cpl_trace_pkt *p = cplhdr(skb);
 838
 839         skb->protocol = htons(0xffff);
 840         skb->dev = dev->lldev;
 841         skb_pull(skb, sizeof(*p));
 842         skb_reset_mac_header(skb);
 843         netif_receive_skb(skb);
 844         return 0;
 845 }
 846
 847 /*
 848  * That skb would better have come from process_responses() where we abuse
 849  * ->priority and ->csum to carry our data.  NB: if we get to per-arch
 850  * ->csum, the things might get really interesting here.
 851  */
 852
 853 static inline u32 get_hwtid(struct sk_buff *skb)
 854 {
 855         return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
 856 }
 857
 858 static inline u32 get_opcode(struct sk_buff *skb)
 859 {
 860         return G_OPCODE(ntohl((__force __be32)skb->csum));
 861 }
 862
 863 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
 864 {
 865         unsigned int hwtid = get_hwtid(skb);
 866         unsigned int opcode = get_opcode(skb);
 867         struct t3c_tid_entry *t3c_tid;
 868
 869         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 870         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 871             t3c_tid->client->handlers[opcode]) {
 872                 return t3c_tid->client->handlers[opcode] (dev, skb,
 873                                                           t3c_tid->ctx);
 874         } else {
 875                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 876                        dev->name, opcode);
 877                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 878         }
 879 }
 880
 881 static int nb_callback(struct notifier_block *self, unsigned long event,
 882                        void *ctx)
 883 {
 884         switch (event) {
 885         case (NETEVENT_NEIGH_UPDATE):{
 886                 cxgb_neigh_update((struct neighbour *)ctx);
 887                 break;
 888         }
 889         case (NETEVENT_PMTU_UPDATE):
 890                 break;
 891         case (NETEVENT_REDIRECT):{
 892                 struct netevent_redirect *nr = ctx;
 893                 cxgb_redirect(nr->old, nr->new);
 894                 cxgb_neigh_update(nr->new->neighbour);
 895                 break;
 896         }
 897         default:
 898                 break;
 899         }
 900         return 0;
 901 }
 902
 903 static struct notifier_block nb = {
 904         .notifier_call = nb_callback
 905 };
 906
 907 /*
 908  * Process a received packet with an unknown/unexpected CPL opcode.
 909  */
 910 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
 911 {
 912         printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
 913                *skb->data);
 914         return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 915 }
 916
 917 /*
 918  * Handlers for each CPL opcode
 919  */
 920 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
 921
 922 /*
 923  * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
 924  * to unregister an existing handler.
 925  */
 926 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
 927 {
 928         if (opcode < NUM_CPL_CMDS)
 929                 cpl_handlers[opcode] = h ? h : do_bad_cpl;
 930         else
 931                 printk(KERN_ERR "T3C: handler registration for "
 932                        "opcode %x failed\n", opcode);
 933 }
 934
 935 EXPORT_SYMBOL(t3_register_cpl_handler);
 936
 937 /*
 938  * T3CDEV's receive method.
 939  */
 940 int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
 941 {
 942         while (n--) {
 943                 struct sk_buff *skb = *skbs++;
 944                 unsigned int opcode = get_opcode(skb);
 945                 int ret = cpl_handlers[opcode] (dev, skb);
 946
 947 #if VALIDATE_TID
 948                 if (ret & CPL_RET_UNKNOWN_TID) {
 949                         union opcode_tid *p = cplhdr(skb);
 950
 951                         printk(KERN_ERR "%s: CPL message (opcode %u) had "
 952                                "unknown TID %u\n", dev->name, opcode,
 953                                G_TID(ntohl(p->opcode_tid)));
 954                 }
 955 #endif
 956                 if (ret & CPL_RET_BUF_DONE)
 957                         kfree_skb(skb);
 958         }
 959         return 0;
 960 }
 961
 962 /*
 963  * Sends an sk_buff to a T3C driver after dealing with any active network taps.
 964  */
 965 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
 966 {
 967         int r;
 968
 969         local_bh_disable();
 970         r = dev->send(dev, skb);
 971         local_bh_enable();
 972         return r;
 973 }
 974
 975 EXPORT_SYMBOL(cxgb3_ofld_send);
 976
 977 static int is_offloading(struct net_device *dev)
 978 {
 979         struct adapter *adapter;
 980         int i;
 981
 982         read_lock_bh(&adapter_list_lock);
 983         list_for_each_entry(adapter, &adapter_list, adapter_list) {
 984                 for_each_port(adapter, i) {
 985                         if (dev == adapter->port[i]) {
 986                                 read_unlock_bh(&adapter_list_lock);
 987                                 return 1;
 988                         }
 989                 }
 990         }
 991         read_unlock_bh(&adapter_list_lock);
 992         return 0;
 993 }
 994
 995 void cxgb_neigh_update(struct neighbour *neigh)
 996 {
 997         struct net_device *dev = neigh->dev;
 998
 999         if (dev && (is_offloading(dev))) {
1000                 struct t3cdev *tdev = dev2t3cdev(dev);
1001
1002                 BUG_ON(!tdev);
1003                 t3_l2t_update(tdev, neigh);
1004         }
1005 }
1006
1007 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
1008 {
1009         struct sk_buff *skb;
1010         struct cpl_set_tcb_field *req;
1011
1012         skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
1013         if (!skb) {
1014                 printk(KERN_ERR "%s: cannot allocate skb!\n", __FUNCTION__);
1015                 return;
1016         }
1017         skb->priority = CPL_PRIORITY_CONTROL;
1018         req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
1019         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1020         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1021         req->reply = 0;
1022         req->cpu_idx = 0;
1023         req->word = htons(W_TCB_L2T_IX);
1024         req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
1025         req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
1026         tdev->send(tdev, skb);
1027 }
1028
1029 void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
1030 {
1031         struct net_device *olddev, *newdev;
1032         struct tid_info *ti;
1033         struct t3cdev *tdev;
1034         u32 tid;
1035         int update_tcb;
1036         struct l2t_entry *e;
1037         struct t3c_tid_entry *te;
1038
1039         olddev = old->neighbour->dev;
1040         newdev = new->neighbour->dev;
1041         if (!is_offloading(olddev))
1042                 return;
1043         if (!is_offloading(newdev)) {
1044                 printk(KERN_WARNING "%s: Redirect to non-offload "
1045                        "device ignored.\n", __FUNCTION__);
1046                 return;
1047         }
1048         tdev = dev2t3cdev(olddev);
1049         BUG_ON(!tdev);
1050         if (tdev != dev2t3cdev(newdev)) {
1051                 printk(KERN_WARNING "%s: Redirect to different "
1052                        "offload device ignored.\n", __FUNCTION__);
1053                 return;
1054         }
1055
1056         /* Add new L2T entry */
1057         e = t3_l2t_get(tdev, new->neighbour, newdev);
1058         if (!e) {
1059                 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
1060                        __FUNCTION__);
1061                 return;
1062         }
1063
1064         /* Walk tid table and notify clients of dst change. */
1065         ti = &(T3C_DATA(tdev))->tid_maps;
1066         for (tid = 0; tid < ti->ntids; tid++) {
1067                 te = lookup_tid(ti, tid);
1068                 BUG_ON(!te);
1069                 if (te && te->ctx && te->client && te->client->redirect) {
1070                         update_tcb = te->client->redirect(te->ctx, old, new, e);
1071                         if (update_tcb) {
1072                                 l2t_hold(L2DATA(tdev), e);
1073                                 set_l2t_ix(tdev, tid, e);
1074                         }
1075                 }
1076         }
1077         l2t_release(L2DATA(tdev), e);
1078 }
1079
1080 /*
1081  * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1082  * The allocated memory is cleared.
1083  */
1084 void *cxgb_alloc_mem(unsigned long size)
1085 {
1086         void *p = kmalloc(size, GFP_KERNEL);
1087
1088         if (!p)
1089                 p = vmalloc(size);
1090         if (p)
1091                 memset(p, 0, size);
1092         return p;
1093 }
1094
1095 /*
1096  * Free memory allocated through t3_alloc_mem().
1097  */
1098 void cxgb_free_mem(void *addr)
1099 {
1100         if (is_vmalloc_addr(addr))
1101                 vfree(addr);
1102         else
1103                 kfree(addr);
1104 }
1105
1106 /*
1107  * Allocate and initialize the TID tables.  Returns 0 on success.
1108  */
1109 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1110                          unsigned int natids, unsigned int nstids,
1111                          unsigned int atid_base, unsigned int stid_base)
1112 {
1113         unsigned long size = ntids * sizeof(*t->tid_tab) +
1114             natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1115
1116         t->tid_tab = cxgb_alloc_mem(size);
1117         if (!t->tid_tab)
1118                 return -ENOMEM;
1119
1120         t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1121         t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1122         t->ntids = ntids;
1123         t->nstids = nstids;
1124         t->stid_base = stid_base;
1125         t->sfree = NULL;
1126         t->natids = natids;
1127         t->atid_base = atid_base;
1128         t->afree = NULL;
1129         t->stids_in_use = t->atids_in_use = 0;
1130         atomic_set(&t->tids_in_use, 0);
1131         spin_lock_init(&t->stid_lock);
1132         spin_lock_init(&t->atid_lock);
1133
1134         /*
1135          * Setup the free lists for stid_tab and atid_tab.
1136          */
1137         if (nstids) {
1138                 while (--nstids)
1139                         t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1140                 t->sfree = t->stid_tab;
1141         }
1142         if (natids) {
1143                 while (--natids)
1144                         t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1145                 t->afree = t->atid_tab;
1146         }
1147         return 0;
1148 }
1149
1150 static void free_tid_maps(struct tid_info *t)
1151 {
1152         cxgb_free_mem(t->tid_tab);
1153 }
1154
1155 static inline void add_adapter(struct adapter *adap)
1156 {
1157         write_lock_bh(&adapter_list_lock);
1158         list_add_tail(&adap->adapter_list, &adapter_list);
1159         write_unlock_bh(&adapter_list_lock);
1160 }
1161
1162 static inline void remove_adapter(struct adapter *adap)
1163 {
1164         write_lock_bh(&adapter_list_lock);
1165         list_del(&adap->adapter_list);
1166         write_unlock_bh(&adapter_list_lock);
1167 }
1168
1169 int cxgb3_offload_activate(struct adapter *adapter)
1170 {
1171         struct t3cdev *dev = &adapter->tdev;
1172         int natids, err;
1173         struct t3c_data *t;
1174         struct tid_range stid_range, tid_range;
1175         struct mtutab mtutab;
1176         unsigned int l2t_capacity;
1177
1178         t = kcalloc(1, sizeof(*t), GFP_KERNEL);
1179         if (!t)
1180                 return -ENOMEM;
1181
1182         err = -EOPNOTSUPP;
1183         if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1184             dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1185             dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1186             dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1187             dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1188             dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1189                 goto out_free;
1190
1191         err = -ENOMEM;
1192         L2DATA(dev) = t3_init_l2t(l2t_capacity);
1193         if (!L2DATA(dev))
1194                 goto out_free;
1195
1196         natids = min(tid_range.num / 2, MAX_ATIDS);
1197         err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1198                             stid_range.num, ATID_BASE, stid_range.base);
1199         if (err)
1200                 goto out_free_l2t;
1201
1202         t->mtus = mtutab.mtus;
1203         t->nmtus = mtutab.size;
1204
1205         INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1206         spin_lock_init(&t->tid_release_lock);
1207         INIT_LIST_HEAD(&t->list_node);
1208         t->dev = dev;
1209
1210         T3C_DATA(dev) = t;
1211         dev->recv = process_rx;
1212         dev->neigh_update = t3_l2t_update;
1213
1214         /* Register netevent handler once */
1215         if (list_empty(&adapter_list))
1216                 register_netevent_notifier(&nb);
1217
1218         add_adapter(adapter);
1219         return 0;
1220
1221 out_free_l2t:
1222         t3_free_l2t(L2DATA(dev));
1223         L2DATA(dev) = NULL;
1224 out_free:
1225         kfree(t);
1226         return err;
1227 }
1228
1229 void cxgb3_offload_deactivate(struct adapter *adapter)
1230 {
1231         struct t3cdev *tdev = &adapter->tdev;
1232         struct t3c_data *t = T3C_DATA(tdev);
1233
1234         remove_adapter(adapter);
1235         if (list_empty(&adapter_list))
1236                 unregister_netevent_notifier(&nb);
1237
1238         free_tid_maps(&t->tid_maps);
1239         T3C_DATA(tdev) = NULL;
1240         t3_free_l2t(L2DATA(tdev));
1241         L2DATA(tdev) = NULL;
1242         kfree(t);
1243 }
1244
1245 static inline void register_tdev(struct t3cdev *tdev)
1246 {
1247         static int unit;
1248
1249         mutex_lock(&cxgb3_db_lock);
1250         snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1251         list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1252         mutex_unlock(&cxgb3_db_lock);
1253 }
1254
1255 static inline void unregister_tdev(struct t3cdev *tdev)
1256 {
1257         mutex_lock(&cxgb3_db_lock);
1258         list_del(&tdev->ofld_dev_list);
1259         mutex_unlock(&cxgb3_db_lock);
1260 }
1261
1262 static inline int adap2type(struct adapter *adapter)
1263 {
1264         int type = 0;
1265
1266         switch (adapter->params.rev) {
1267         case T3_REV_A:
1268                 type = T3A;
1269                 break;
1270         case T3_REV_B:
1271         case T3_REV_B2:
1272                 type = T3B;
1273                 break;
1274         case T3_REV_C:
1275                 type = T3C;
1276                 break;
1277         }
1278         return type;
1279 }
1280
1281 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1282 {
1283         struct t3cdev *tdev = &adapter->tdev;
1284
1285         INIT_LIST_HEAD(&tdev->ofld_dev_list);
1286
1287         cxgb3_set_dummy_ops(tdev);
1288         tdev->send = t3_offload_tx;
1289         tdev->ctl = cxgb_offload_ctl;
1290         tdev->type = adap2type(adapter);
1291
1292         register_tdev(tdev);
1293 }
1294
1295 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1296 {
1297         struct t3cdev *tdev = &adapter->tdev;
1298
1299         tdev->recv = NULL;
1300         tdev->neigh_update = NULL;
1301
1302         unregister_tdev(tdev);
1303 }
1304
1305 void __init cxgb3_offload_init(void)
1306 {
1307         int i;
1308
1309         for (i = 0; i < NUM_CPL_CMDS; ++i)
1310                 cpl_handlers[i] = do_bad_cpl;
1311
1312         t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1313         t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1314         t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
1315         t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1316         t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1317         t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1318         t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1319         t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1320         t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1321         t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1322         t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1323         t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1324         t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1325         t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1326         t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1327         t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1328         t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1329         t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1330         t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1331         t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1332         t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1333         t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1334         t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1335         t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1336         t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1337         t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1338 }