git.oblomov.eu 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 = 0x100000;
  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                 break;
 211         default:
 212                 ret = -EOPNOTSUPP;
 213         }
 214         return ret;
 215 }
 216
 217 /* Response queue used for RDMA events. */
 218 #define ASYNC_NOTIF_RSPQ 0
 219
 220 static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
 221 {
 222         int ret = 0;
 223
 224         switch (req) {
 225         case RDMA_GET_PARAMS:{
 226                 struct rdma_info *req = data;
 227                 struct pci_dev *pdev = adapter->pdev;
 228
 229                 req->udbell_physbase = pci_resource_start(pdev, 2);
 230                 req->udbell_len = pci_resource_len(pdev, 2);
 231                 req->tpt_base =
 232                         t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
 233                 req->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
 234                 req->pbl_base =
 235                         t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
 236                 req->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
 237                 req->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
 238                 req->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
 239                 req->kdb_addr = adapter->regs + A_SG_KDOORBELL;
 240                 req->pdev = pdev;
 241                 break;
 242         }
 243         case RDMA_CQ_OP:{
 244                 unsigned long flags;
 245                 struct rdma_cq_op *req = data;
 246
 247                 /* may be called in any context */
 248                 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
 249                 ret = t3_sge_cqcntxt_op(adapter, req->id, req->op,
 250                                         req->credits);
 251                 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
 252                 break;
 253         }
 254         case RDMA_GET_MEM:{
 255                 struct ch_mem_range *t = data;
 256                 struct mc7 *mem;
 257
 258                 if ((t->addr & 7) || (t->len & 7))
 259                         return -EINVAL;
 260                 if (t->mem_id == MEM_CM)
 261                         mem = &adapter->cm;
 262                 else if (t->mem_id == MEM_PMRX)
 263                         mem = &adapter->pmrx;
 264                 else if (t->mem_id == MEM_PMTX)
 265                         mem = &adapter->pmtx;
 266                 else
 267                         return -EINVAL;
 268
 269                 ret =
 270                         t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
 271                                         (u64 *) t->buf);
 272                 if (ret)
 273                         return ret;
 274                 break;
 275         }
 276         case RDMA_CQ_SETUP:{
 277                 struct rdma_cq_setup *req = data;
 278
 279                 spin_lock_irq(&adapter->sge.reg_lock);
 280                 ret =
 281                         t3_sge_init_cqcntxt(adapter, req->id,
 282                                         req->base_addr, req->size,
 283                                         ASYNC_NOTIF_RSPQ,
 284                                         req->ovfl_mode, req->credits,
 285                                         req->credit_thres);
 286                 spin_unlock_irq(&adapter->sge.reg_lock);
 287                 break;
 288         }
 289         case RDMA_CQ_DISABLE:
 290                 spin_lock_irq(&adapter->sge.reg_lock);
 291                 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
 292                 spin_unlock_irq(&adapter->sge.reg_lock);
 293                 break;
 294         case RDMA_CTRL_QP_SETUP:{
 295                 struct rdma_ctrlqp_setup *req = data;
 296
 297                 spin_lock_irq(&adapter->sge.reg_lock);
 298                 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
 299                                                 SGE_CNTXT_RDMA,
 300                                                 ASYNC_NOTIF_RSPQ,
 301                                                 req->base_addr, req->size,
 302                                                 FW_RI_TID_START, 1, 0);
 303                 spin_unlock_irq(&adapter->sge.reg_lock);
 304                 break;
 305         }
 306         default:
 307                 ret = -EOPNOTSUPP;
 308         }
 309         return ret;
 310 }
 311
 312 static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
 313 {
 314         struct adapter *adapter = tdev2adap(tdev);
 315         struct tid_range *tid;
 316         struct mtutab *mtup;
 317         struct iff_mac *iffmacp;
 318         struct ddp_params *ddpp;
 319         struct adap_ports *ports;
 320         int i;
 321
 322         switch (req) {
 323         case GET_MAX_OUTSTANDING_WR:
 324                 *(unsigned int *)data = FW_WR_NUM;
 325                 break;
 326         case GET_WR_LEN:
 327                 *(unsigned int *)data = WR_FLITS;
 328                 break;
 329         case GET_TX_MAX_CHUNK:
 330                 *(unsigned int *)data = 1 << 20;        /* 1MB */
 331                 break;
 332         case GET_TID_RANGE:
 333                 tid = data;
 334                 tid->num = t3_mc5_size(&adapter->mc5) -
 335                     adapter->params.mc5.nroutes -
 336                     adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
 337                 tid->base = 0;
 338                 break;
 339         case GET_STID_RANGE:
 340                 tid = data;
 341                 tid->num = adapter->params.mc5.nservers;
 342                 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
 343                     adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
 344                 break;
 345         case GET_L2T_CAPACITY:
 346                 *(unsigned int *)data = 2048;
 347                 break;
 348         case GET_MTUS:
 349                 mtup = data;
 350                 mtup->size = NMTUS;
 351                 mtup->mtus = adapter->params.mtus;
 352                 break;
 353         case GET_IFF_FROM_MAC:
 354                 iffmacp = data;
 355                 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
 356                                                 iffmacp->vlan_tag &
 357                                                 VLAN_VID_MASK);
 358                 break;
 359         case GET_DDP_PARAMS:
 360                 ddpp = data;
 361                 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
 362                 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
 363                 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
 364                 break;
 365         case GET_PORTS:
 366                 ports = data;
 367                 ports->nports = adapter->params.nports;
 368                 for_each_port(adapter, i)
 369                         ports->lldevs[i] = adapter->port[i];
 370                 break;
 371         case ULP_ISCSI_GET_PARAMS:
 372         case ULP_ISCSI_SET_PARAMS:
 373                 if (!offload_running(adapter))
 374                         return -EAGAIN;
 375                 return cxgb_ulp_iscsi_ctl(adapter, req, data);
 376         case RDMA_GET_PARAMS:
 377         case RDMA_CQ_OP:
 378         case RDMA_CQ_SETUP:
 379         case RDMA_CQ_DISABLE:
 380         case RDMA_CTRL_QP_SETUP:
 381         case RDMA_GET_MEM:
 382                 if (!offload_running(adapter))
 383                         return -EAGAIN;
 384                 return cxgb_rdma_ctl(adapter, req, data);
 385         default:
 386                 return -EOPNOTSUPP;
 387         }
 388         return 0;
 389 }
 390
 391 /*
 392  * Dummy handler for Rx offload packets in case we get an offload packet before
 393  * proper processing is setup.  This complains and drops the packet as it isn't
 394  * normal to get offload packets at this stage.
 395  */
 396 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
 397                                 int n)
 398 {
 399         CH_ERR(tdev2adap(dev), "%d unexpected offload packets, first data %u\n",
 400                n, ntohl(*(__be32 *)skbs[0]->data));
 401         while (n--)
 402                 dev_kfree_skb_any(skbs[n]);
 403         return 0;
 404 }
 405
 406 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
 407 {
 408 }
 409
 410 void cxgb3_set_dummy_ops(struct t3cdev *dev)
 411 {
 412         dev->recv = rx_offload_blackhole;
 413         dev->neigh_update = dummy_neigh_update;
 414 }
 415
 416 /*
 417  * Free an active-open TID.
 418  */
 419 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
 420 {
 421         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 422         union active_open_entry *p = atid2entry(t, atid);
 423         void *ctx = p->t3c_tid.ctx;
 424
 425         spin_lock_bh(&t->atid_lock);
 426         p->next = t->afree;
 427         t->afree = p;
 428         t->atids_in_use--;
 429         spin_unlock_bh(&t->atid_lock);
 430
 431         return ctx;
 432 }
 433
 434 EXPORT_SYMBOL(cxgb3_free_atid);
 435
 436 /*
 437  * Free a server TID and return it to the free pool.
 438  */
 439 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
 440 {
 441         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 442         union listen_entry *p = stid2entry(t, stid);
 443
 444         spin_lock_bh(&t->stid_lock);
 445         p->next = t->sfree;
 446         t->sfree = p;
 447         t->stids_in_use--;
 448         spin_unlock_bh(&t->stid_lock);
 449 }
 450
 451 EXPORT_SYMBOL(cxgb3_free_stid);
 452
 453 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
 454                       void *ctx, unsigned int tid)
 455 {
 456         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 457
 458         t->tid_tab[tid].client = client;
 459         t->tid_tab[tid].ctx = ctx;
 460         atomic_inc(&t->tids_in_use);
 461 }
 462
 463 EXPORT_SYMBOL(cxgb3_insert_tid);
 464
 465 /*
 466  * Populate a TID_RELEASE WR.  The skb must be already propely sized.
 467  */
 468 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
 469 {
 470         struct cpl_tid_release *req;
 471
 472         skb->priority = CPL_PRIORITY_SETUP;
 473         req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
 474         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
 475         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
 476 }
 477
 478 static void t3_process_tid_release_list(struct work_struct *work)
 479 {
 480         struct t3c_data *td = container_of(work, struct t3c_data,
 481                                            tid_release_task);
 482         struct sk_buff *skb;
 483         struct t3cdev *tdev = td->dev;
 484
 485
 486         spin_lock_bh(&td->tid_release_lock);
 487         while (td->tid_release_list) {
 488                 struct t3c_tid_entry *p = td->tid_release_list;
 489
 490                 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
 491                 spin_unlock_bh(&td->tid_release_lock);
 492
 493                 skb = alloc_skb(sizeof(struct cpl_tid_release),
 494                                 GFP_KERNEL | __GFP_NOFAIL);
 495                 mk_tid_release(skb, p - td->tid_maps.tid_tab);
 496                 cxgb3_ofld_send(tdev, skb);
 497                 p->ctx = NULL;
 498                 spin_lock_bh(&td->tid_release_lock);
 499         }
 500         spin_unlock_bh(&td->tid_release_lock);
 501 }
 502
 503 /* use ctx as a next pointer in the tid release list */
 504 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
 505 {
 506         struct t3c_data *td = T3C_DATA(tdev);
 507         struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
 508
 509         spin_lock_bh(&td->tid_release_lock);
 510         p->ctx = (void *)td->tid_release_list;
 511         p->client = NULL;
 512         td->tid_release_list = p;
 513         if (!p->ctx)
 514                 schedule_work(&td->tid_release_task);
 515         spin_unlock_bh(&td->tid_release_lock);
 516 }
 517
 518 EXPORT_SYMBOL(cxgb3_queue_tid_release);
 519
 520 /*
 521  * Remove a tid from the TID table.  A client may defer processing its last
 522  * CPL message if it is locked at the time it arrives, and while the message
 523  * sits in the client's backlog the TID may be reused for another connection.
 524  * To handle this we atomically switch the TID association if it still points
 525  * to the original client context.
 526  */
 527 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
 528 {
 529         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 530
 531         BUG_ON(tid >= t->ntids);
 532         if (tdev->type == T3A)
 533                 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
 534         else {
 535                 struct sk_buff *skb;
 536
 537                 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
 538                 if (likely(skb)) {
 539                         mk_tid_release(skb, tid);
 540                         cxgb3_ofld_send(tdev, skb);
 541                         t->tid_tab[tid].ctx = NULL;
 542                 } else
 543                         cxgb3_queue_tid_release(tdev, tid);
 544         }
 545         atomic_dec(&t->tids_in_use);
 546 }
 547
 548 EXPORT_SYMBOL(cxgb3_remove_tid);
 549
 550 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
 551                      void *ctx)
 552 {
 553         int atid = -1;
 554         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 555
 556         spin_lock_bh(&t->atid_lock);
 557         if (t->afree &&
 558             t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
 559             t->ntids) {
 560                 union active_open_entry *p = t->afree;
 561
 562                 atid = (p - t->atid_tab) + t->atid_base;
 563                 t->afree = p->next;
 564                 p->t3c_tid.ctx = ctx;
 565                 p->t3c_tid.client = client;
 566                 t->atids_in_use++;
 567         }
 568         spin_unlock_bh(&t->atid_lock);
 569         return atid;
 570 }
 571
 572 EXPORT_SYMBOL(cxgb3_alloc_atid);
 573
 574 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
 575                      void *ctx)
 576 {
 577         int stid = -1;
 578         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 579
 580         spin_lock_bh(&t->stid_lock);
 581         if (t->sfree) {
 582                 union listen_entry *p = t->sfree;
 583
 584                 stid = (p - t->stid_tab) + t->stid_base;
 585                 t->sfree = p->next;
 586                 p->t3c_tid.ctx = ctx;
 587                 p->t3c_tid.client = client;
 588                 t->stids_in_use++;
 589         }
 590         spin_unlock_bh(&t->stid_lock);
 591         return stid;
 592 }
 593
 594 EXPORT_SYMBOL(cxgb3_alloc_stid);
 595
 596 /* Get the t3cdev associated with a net_device */
 597 struct t3cdev *dev2t3cdev(struct net_device *dev)
 598 {
 599         const struct port_info *pi = netdev_priv(dev);
 600
 601         return (struct t3cdev *)pi->adapter;
 602 }
 603
 604 EXPORT_SYMBOL(dev2t3cdev);
 605
 606 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 607 {
 608         struct cpl_smt_write_rpl *rpl = cplhdr(skb);
 609
 610         if (rpl->status != CPL_ERR_NONE)
 611                 printk(KERN_ERR
 612                        "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
 613                        rpl->status, GET_TID(rpl));
 614
 615         return CPL_RET_BUF_DONE;
 616 }
 617
 618 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 619 {
 620         struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
 621
 622         if (rpl->status != CPL_ERR_NONE)
 623                 printk(KERN_ERR
 624                        "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
 625                        rpl->status, GET_TID(rpl));
 626
 627         return CPL_RET_BUF_DONE;
 628 }
 629
 630 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
 631 {
 632         struct cpl_act_open_rpl *rpl = cplhdr(skb);
 633         unsigned int atid = G_TID(ntohl(rpl->atid));
 634         struct t3c_tid_entry *t3c_tid;
 635
 636         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
 637         if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
 638             t3c_tid->client->handlers &&
 639             t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
 640                 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
 641                                                                     t3c_tid->
 642                                                                     ctx);
 643         } else {
 644                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 645                        dev->name, CPL_ACT_OPEN_RPL);
 646                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 647         }
 648 }
 649
 650 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 651 {
 652         union opcode_tid *p = cplhdr(skb);
 653         unsigned int stid = G_TID(ntohl(p->opcode_tid));
 654         struct t3c_tid_entry *t3c_tid;
 655
 656         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
 657         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 658             t3c_tid->client->handlers[p->opcode]) {
 659                 return t3c_tid->client->handlers[p->opcode] (dev, skb,
 660                                                              t3c_tid->ctx);
 661         } else {
 662                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 663                        dev->name, p->opcode);
 664                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 665         }
 666 }
 667
 668 static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 669 {
 670         union opcode_tid *p = cplhdr(skb);
 671         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 672         struct t3c_tid_entry *t3c_tid;
 673
 674         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 675         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 676             t3c_tid->client->handlers[p->opcode]) {
 677                 return t3c_tid->client->handlers[p->opcode]
 678                     (dev, skb, t3c_tid->ctx);
 679         } else {
 680                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 681                        dev->name, p->opcode);
 682                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 683         }
 684 }
 685
 686 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
 687 {
 688         struct cpl_pass_accept_req *req = cplhdr(skb);
 689         unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 690         struct t3c_tid_entry *t3c_tid;
 691
 692         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
 693         if (t3c_tid->ctx && t3c_tid->client->handlers &&
 694             t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
 695                 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
 696                     (dev, skb, t3c_tid->ctx);
 697         } else {
 698                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 699                        dev->name, CPL_PASS_ACCEPT_REQ);
 700                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 701         }
 702 }
 703
 704 /*
 705  * Returns an sk_buff for a reply CPL message of size len.  If the input
 706  * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
 707  * is allocated.  The input skb must be of size at least len.  Note that this
 708  * operation does not destroy the original skb data even if it decides to reuse
 709  * the buffer.
 710  */
 711 static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
 712                                                gfp_t gfp)
 713 {
 714         if (likely(!skb_cloned(skb))) {
 715                 BUG_ON(skb->len < len);
 716                 __skb_trim(skb, len);
 717                 skb_get(skb);
 718         } else {
 719                 skb = alloc_skb(len, gfp);
 720                 if (skb)
 721                         __skb_put(skb, len);
 722         }
 723         return skb;
 724 }
 725
 726 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
 727 {
 728         union opcode_tid *p = cplhdr(skb);
 729         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 730         struct t3c_tid_entry *t3c_tid;
 731
 732         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 733         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 734             t3c_tid->client->handlers[p->opcode]) {
 735                 return t3c_tid->client->handlers[p->opcode]
 736                     (dev, skb, t3c_tid->ctx);
 737         } else {
 738                 struct cpl_abort_req_rss *req = cplhdr(skb);
 739                 struct cpl_abort_rpl *rpl;
 740                 struct sk_buff *reply_skb;
 741                 unsigned int tid = GET_TID(req);
 742                 u8 cmd = req->status;
 743
 744                 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
 745                     req->status == CPL_ERR_PERSIST_NEG_ADVICE)
 746                         goto out;
 747
 748                 reply_skb = cxgb3_get_cpl_reply_skb(skb,
 749                                                     sizeof(struct
 750                                                            cpl_abort_rpl),
 751                                                     GFP_ATOMIC);
 752
 753                 if (!reply_skb) {
 754                         printk("do_abort_req_rss: couldn't get skb!\n");
 755                         goto out;
 756                 }
 757                 reply_skb->priority = CPL_PRIORITY_DATA;
 758                 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
 759                 rpl = cplhdr(reply_skb);
 760                 rpl->wr.wr_hi =
 761                     htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
 762                 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
 763                 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
 764                 rpl->cmd = cmd;
 765                 cxgb3_ofld_send(dev, reply_skb);
 766 out:
 767                 return CPL_RET_BUF_DONE;
 768         }
 769 }
 770
 771 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
 772 {
 773         struct cpl_act_establish *req = cplhdr(skb);
 774         unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 775         struct t3c_tid_entry *t3c_tid;
 776
 777         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
 778         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 779             t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
 780                 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
 781                     (dev, skb, t3c_tid->ctx);
 782         } else {
 783                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 784                        dev->name, CPL_PASS_ACCEPT_REQ);
 785                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 786         }
 787 }
 788
 789 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
 790 {
 791         struct cpl_trace_pkt *p = cplhdr(skb);
 792
 793         skb->protocol = htons(0xffff);
 794         skb->dev = dev->lldev;
 795         skb_pull(skb, sizeof(*p));
 796         skb_reset_mac_header(skb);
 797         netif_receive_skb(skb);
 798         return 0;
 799 }
 800
 801 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
 802 {
 803         unsigned int hwtid = ntohl(skb->priority) >> 8 & 0xfffff;
 804         unsigned int opcode = G_OPCODE(ntohl(skb->csum));
 805         struct t3c_tid_entry *t3c_tid;
 806
 807         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 808         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 809             t3c_tid->client->handlers[opcode]) {
 810                 return t3c_tid->client->handlers[opcode] (dev, skb,
 811                                                           t3c_tid->ctx);
 812         } else {
 813                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 814                        dev->name, opcode);
 815                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 816         }
 817 }
 818
 819 static int nb_callback(struct notifier_block *self, unsigned long event,
 820                        void *ctx)
 821 {
 822         switch (event) {
 823         case (NETEVENT_NEIGH_UPDATE):{
 824                 cxgb_neigh_update((struct neighbour *)ctx);
 825                 break;
 826         }
 827         case (NETEVENT_PMTU_UPDATE):
 828                 break;
 829         case (NETEVENT_REDIRECT):{
 830                 struct netevent_redirect *nr = ctx;
 831                 cxgb_redirect(nr->old, nr->new);
 832                 cxgb_neigh_update(nr->new->neighbour);
 833                 break;
 834         }
 835         default:
 836                 break;
 837         }
 838         return 0;
 839 }
 840
 841 static struct notifier_block nb = {
 842         .notifier_call = nb_callback
 843 };
 844
 845 /*
 846  * Process a received packet with an unknown/unexpected CPL opcode.
 847  */
 848 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
 849 {
 850         printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
 851                *skb->data);
 852         return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 853 }
 854
 855 /*
 856  * Handlers for each CPL opcode
 857  */
 858 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
 859
 860 /*
 861  * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
 862  * to unregister an existing handler.
 863  */
 864 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
 865 {
 866         if (opcode < NUM_CPL_CMDS)
 867                 cpl_handlers[opcode] = h ? h : do_bad_cpl;
 868         else
 869                 printk(KERN_ERR "T3C: handler registration for "
 870                        "opcode %x failed\n", opcode);
 871 }
 872
 873 EXPORT_SYMBOL(t3_register_cpl_handler);
 874
 875 /*
 876  * T3CDEV's receive method.
 877  */
 878 int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
 879 {
 880         while (n--) {
 881                 struct sk_buff *skb = *skbs++;
 882                 unsigned int opcode = G_OPCODE(ntohl(skb->csum));
 883                 int ret = cpl_handlers[opcode] (dev, skb);
 884
 885 #if VALIDATE_TID
 886                 if (ret & CPL_RET_UNKNOWN_TID) {
 887                         union opcode_tid *p = cplhdr(skb);
 888
 889                         printk(KERN_ERR "%s: CPL message (opcode %u) had "
 890                                "unknown TID %u\n", dev->name, opcode,
 891                                G_TID(ntohl(p->opcode_tid)));
 892                 }
 893 #endif
 894                 if (ret & CPL_RET_BUF_DONE)
 895                         kfree_skb(skb);
 896         }
 897         return 0;
 898 }
 899
 900 /*
 901  * Sends an sk_buff to a T3C driver after dealing with any active network taps.
 902  */
 903 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
 904 {
 905         int r;
 906
 907         local_bh_disable();
 908         r = dev->send(dev, skb);
 909         local_bh_enable();
 910         return r;
 911 }
 912
 913 EXPORT_SYMBOL(cxgb3_ofld_send);
 914
 915 static int is_offloading(struct net_device *dev)
 916 {
 917         struct adapter *adapter;
 918         int i;
 919
 920         read_lock_bh(&adapter_list_lock);
 921         list_for_each_entry(adapter, &adapter_list, adapter_list) {
 922                 for_each_port(adapter, i) {
 923                         if (dev == adapter->port[i]) {
 924                                 read_unlock_bh(&adapter_list_lock);
 925                                 return 1;
 926                         }
 927                 }
 928         }
 929         read_unlock_bh(&adapter_list_lock);
 930         return 0;
 931 }
 932
 933 void cxgb_neigh_update(struct neighbour *neigh)
 934 {
 935         struct net_device *dev = neigh->dev;
 936
 937         if (dev && (is_offloading(dev))) {
 938                 struct t3cdev *tdev = dev2t3cdev(dev);
 939
 940                 BUG_ON(!tdev);
 941                 t3_l2t_update(tdev, neigh);
 942         }
 943 }
 944
 945 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
 946 {
 947         struct sk_buff *skb;
 948         struct cpl_set_tcb_field *req;
 949
 950         skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
 951         if (!skb) {
 952                 printk(KERN_ERR "%s: cannot allocate skb!\n", __FUNCTION__);
 953                 return;
 954         }
 955         skb->priority = CPL_PRIORITY_CONTROL;
 956         req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
 957         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
 958         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
 959         req->reply = 0;
 960         req->cpu_idx = 0;
 961         req->word = htons(W_TCB_L2T_IX);
 962         req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
 963         req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
 964         tdev->send(tdev, skb);
 965 }
 966
 967 void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
 968 {
 969         struct net_device *olddev, *newdev;
 970         struct tid_info *ti;
 971         struct t3cdev *tdev;
 972         u32 tid;
 973         int update_tcb;
 974         struct l2t_entry *e;
 975         struct t3c_tid_entry *te;
 976
 977         olddev = old->neighbour->dev;
 978         newdev = new->neighbour->dev;
 979         if (!is_offloading(olddev))
 980                 return;
 981         if (!is_offloading(newdev)) {
 982                 printk(KERN_WARNING "%s: Redirect to non-offload"
 983                        "device ignored.\n", __FUNCTION__);
 984                 return;
 985         }
 986         tdev = dev2t3cdev(olddev);
 987         BUG_ON(!tdev);
 988         if (tdev != dev2t3cdev(newdev)) {
 989                 printk(KERN_WARNING "%s: Redirect to different "
 990                        "offload device ignored.\n", __FUNCTION__);
 991                 return;
 992         }
 993
 994         /* Add new L2T entry */
 995         e = t3_l2t_get(tdev, new->neighbour, newdev);
 996         if (!e) {
 997                 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
 998                        __FUNCTION__);
 999                 return;
1000         }
1001
1002         /* Walk tid table and notify clients of dst change. */
1003         ti = &(T3C_DATA(tdev))->tid_maps;
1004         for (tid = 0; tid < ti->ntids; tid++) {
1005                 te = lookup_tid(ti, tid);
1006                 BUG_ON(!te);
1007                 if (te && te->ctx && te->client && te->client->redirect) {
1008                         update_tcb = te->client->redirect(te->ctx, old, new, e);
1009                         if (update_tcb) {
1010                                 l2t_hold(L2DATA(tdev), e);
1011                                 set_l2t_ix(tdev, tid, e);
1012                         }
1013                 }
1014         }
1015         l2t_release(L2DATA(tdev), e);
1016 }
1017
1018 /*
1019  * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1020  * The allocated memory is cleared.
1021  */
1022 void *cxgb_alloc_mem(unsigned long size)
1023 {
1024         void *p = kmalloc(size, GFP_KERNEL);
1025
1026         if (!p)
1027                 p = vmalloc(size);
1028         if (p)
1029                 memset(p, 0, size);
1030         return p;
1031 }
1032
1033 /*
1034  * Free memory allocated through t3_alloc_mem().
1035  */
1036 void cxgb_free_mem(void *addr)
1037 {
1038         unsigned long p = (unsigned long)addr;
1039
1040         if (p >= VMALLOC_START && p < VMALLOC_END)
1041                 vfree(addr);
1042         else
1043                 kfree(addr);
1044 }
1045
1046 /*
1047  * Allocate and initialize the TID tables.  Returns 0 on success.
1048  */
1049 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1050                          unsigned int natids, unsigned int nstids,
1051                          unsigned int atid_base, unsigned int stid_base)
1052 {
1053         unsigned long size = ntids * sizeof(*t->tid_tab) +
1054             natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1055
1056         t->tid_tab = cxgb_alloc_mem(size);
1057         if (!t->tid_tab)
1058                 return -ENOMEM;
1059
1060         t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1061         t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1062         t->ntids = ntids;
1063         t->nstids = nstids;
1064         t->stid_base = stid_base;
1065         t->sfree = NULL;
1066         t->natids = natids;
1067         t->atid_base = atid_base;
1068         t->afree = NULL;
1069         t->stids_in_use = t->atids_in_use = 0;
1070         atomic_set(&t->tids_in_use, 0);
1071         spin_lock_init(&t->stid_lock);
1072         spin_lock_init(&t->atid_lock);
1073
1074         /*
1075          * Setup the free lists for stid_tab and atid_tab.
1076          */
1077         if (nstids) {
1078                 while (--nstids)
1079                         t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1080                 t->sfree = t->stid_tab;
1081         }
1082         if (natids) {
1083                 while (--natids)
1084                         t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1085                 t->afree = t->atid_tab;
1086         }
1087         return 0;
1088 }
1089
1090 static void free_tid_maps(struct tid_info *t)
1091 {
1092         cxgb_free_mem(t->tid_tab);
1093 }
1094
1095 static inline void add_adapter(struct adapter *adap)
1096 {
1097         write_lock_bh(&adapter_list_lock);
1098         list_add_tail(&adap->adapter_list, &adapter_list);
1099         write_unlock_bh(&adapter_list_lock);
1100 }
1101
1102 static inline void remove_adapter(struct adapter *adap)
1103 {
1104         write_lock_bh(&adapter_list_lock);
1105         list_del(&adap->adapter_list);
1106         write_unlock_bh(&adapter_list_lock);
1107 }
1108
1109 int cxgb3_offload_activate(struct adapter *adapter)
1110 {
1111         struct t3cdev *dev = &adapter->tdev;
1112         int natids, err;
1113         struct t3c_data *t;
1114         struct tid_range stid_range, tid_range;
1115         struct mtutab mtutab;
1116         unsigned int l2t_capacity;
1117
1118         t = kcalloc(1, sizeof(*t), GFP_KERNEL);
1119         if (!t)
1120                 return -ENOMEM;
1121
1122         err = -EOPNOTSUPP;
1123         if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1124             dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1125             dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1126             dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1127             dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1128             dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1129                 goto out_free;
1130
1131         err = -ENOMEM;
1132         L2DATA(dev) = t3_init_l2t(l2t_capacity);
1133         if (!L2DATA(dev))
1134                 goto out_free;
1135
1136         natids = min(tid_range.num / 2, MAX_ATIDS);
1137         err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1138                             stid_range.num, ATID_BASE, stid_range.base);
1139         if (err)
1140                 goto out_free_l2t;
1141
1142         t->mtus = mtutab.mtus;
1143         t->nmtus = mtutab.size;
1144
1145         INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1146         spin_lock_init(&t->tid_release_lock);
1147         INIT_LIST_HEAD(&t->list_node);
1148         t->dev = dev;
1149
1150         T3C_DATA(dev) = t;
1151         dev->recv = process_rx;
1152         dev->neigh_update = t3_l2t_update;
1153
1154         /* Register netevent handler once */
1155         if (list_empty(&adapter_list))
1156                 register_netevent_notifier(&nb);
1157
1158         add_adapter(adapter);
1159         return 0;
1160
1161 out_free_l2t:
1162         t3_free_l2t(L2DATA(dev));
1163         L2DATA(dev) = NULL;
1164 out_free:
1165         kfree(t);
1166         return err;
1167 }
1168
1169 void cxgb3_offload_deactivate(struct adapter *adapter)
1170 {
1171         struct t3cdev *tdev = &adapter->tdev;
1172         struct t3c_data *t = T3C_DATA(tdev);
1173
1174         remove_adapter(adapter);
1175         if (list_empty(&adapter_list))
1176                 unregister_netevent_notifier(&nb);
1177
1178         free_tid_maps(&t->tid_maps);
1179         T3C_DATA(tdev) = NULL;
1180         t3_free_l2t(L2DATA(tdev));
1181         L2DATA(tdev) = NULL;
1182         kfree(t);
1183 }
1184
1185 static inline void register_tdev(struct t3cdev *tdev)
1186 {
1187         static int unit;
1188
1189         mutex_lock(&cxgb3_db_lock);
1190         snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1191         list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1192         mutex_unlock(&cxgb3_db_lock);
1193 }
1194
1195 static inline void unregister_tdev(struct t3cdev *tdev)
1196 {
1197         mutex_lock(&cxgb3_db_lock);
1198         list_del(&tdev->ofld_dev_list);
1199         mutex_unlock(&cxgb3_db_lock);
1200 }
1201
1202 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1203 {
1204         struct t3cdev *tdev = &adapter->tdev;
1205
1206         INIT_LIST_HEAD(&tdev->ofld_dev_list);
1207
1208         cxgb3_set_dummy_ops(tdev);
1209         tdev->send = t3_offload_tx;
1210         tdev->ctl = cxgb_offload_ctl;
1211         tdev->type = adapter->params.rev == 0 ? T3A : T3B;
1212
1213         register_tdev(tdev);
1214 }
1215
1216 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1217 {
1218         struct t3cdev *tdev = &adapter->tdev;
1219
1220         tdev->recv = NULL;
1221         tdev->neigh_update = NULL;
1222
1223         unregister_tdev(tdev);
1224 }
1225
1226 void __init cxgb3_offload_init(void)
1227 {
1228         int i;
1229
1230         for (i = 0; i < NUM_CPL_CMDS; ++i)
1231                 cpl_handlers[i] = do_bad_cpl;
1232
1233         t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1234         t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1235         t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1236         t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1237         t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1238         t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1239         t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1240         t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1241         t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1242         t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1243         t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1244         t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1245         t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1246         t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1247         t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1248         t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1249         t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1250         t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1251         t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1252         t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1253         t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1254         t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1255         t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1256         t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1257         t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1258 }