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 = 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                 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 *rdma = data;
 227                 struct pci_dev *pdev = adapter->pdev;
 228
 229                 rdma->udbell_physbase = pci_resource_start(pdev, 2);
 230                 rdma->udbell_len = pci_resource_len(pdev, 2);
 231                 rdma->tpt_base =
 232                         t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
 233                 rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
 234                 rdma->pbl_base =
 235                         t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
 236                 rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
 237                 rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
 238                 rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
 239                 rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
 240                 rdma->pdev = pdev;
 241                 break;
 242         }
 243         case RDMA_CQ_OP:{
 244                 unsigned long flags;
 245                 struct rdma_cq_op *rdma = 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, rdma->id, rdma->op,
 250                                         rdma->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 *rdma = data;
 278
 279                 spin_lock_irq(&adapter->sge.reg_lock);
 280                 ret =
 281                         t3_sge_init_cqcntxt(adapter, rdma->id,
 282                                         rdma->base_addr, rdma->size,
 283                                         ASYNC_NOTIF_RSPQ,
 284                                         rdma->ovfl_mode, rdma->credits,
 285                                         rdma->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 *rdma = 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                                                 rdma->base_addr, rdma->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         struct ofld_page_info *rx_page_info;
 321         struct tp_params *tp = &adapter->params.tp;
 322         int i;
 323
 324         switch (req) {
 325         case GET_MAX_OUTSTANDING_WR:
 326                 *(unsigned int *)data = FW_WR_NUM;
 327                 break;
 328         case GET_WR_LEN:
 329                 *(unsigned int *)data = WR_FLITS;
 330                 break;
 331         case GET_TX_MAX_CHUNK:
 332                 *(unsigned int *)data = 1 << 20;        /* 1MB */
 333                 break;
 334         case GET_TID_RANGE:
 335                 tid = data;
 336                 tid->num = t3_mc5_size(&adapter->mc5) -
 337                     adapter->params.mc5.nroutes -
 338                     adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
 339                 tid->base = 0;
 340                 break;
 341         case GET_STID_RANGE:
 342                 tid = data;
 343                 tid->num = adapter->params.mc5.nservers;
 344                 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
 345                     adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
 346                 break;
 347         case GET_L2T_CAPACITY:
 348                 *(unsigned int *)data = 2048;
 349                 break;
 350         case GET_MTUS:
 351                 mtup = data;
 352                 mtup->size = NMTUS;
 353                 mtup->mtus = adapter->params.mtus;
 354                 break;
 355         case GET_IFF_FROM_MAC:
 356                 iffmacp = data;
 357                 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
 358                                                 iffmacp->vlan_tag &
 359                                                 VLAN_VID_MASK);
 360                 break;
 361         case GET_DDP_PARAMS:
 362                 ddpp = data;
 363                 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
 364                 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
 365                 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
 366                 break;
 367         case GET_PORTS:
 368                 ports = data;
 369                 ports->nports = adapter->params.nports;
 370                 for_each_port(adapter, i)
 371                         ports->lldevs[i] = adapter->port[i];
 372                 break;
 373         case ULP_ISCSI_GET_PARAMS:
 374         case ULP_ISCSI_SET_PARAMS:
 375                 if (!offload_running(adapter))
 376                         return -EAGAIN;
 377                 return cxgb_ulp_iscsi_ctl(adapter, req, data);
 378         case RDMA_GET_PARAMS:
 379         case RDMA_CQ_OP:
 380         case RDMA_CQ_SETUP:
 381         case RDMA_CQ_DISABLE:
 382         case RDMA_CTRL_QP_SETUP:
 383         case RDMA_GET_MEM:
 384                 if (!offload_running(adapter))
 385                         return -EAGAIN;
 386                 return cxgb_rdma_ctl(adapter, req, data);
 387         case GET_RX_PAGE_INFO:
 388                 rx_page_info = data;
 389                 rx_page_info->page_size = tp->rx_pg_size;
 390                 rx_page_info->num = tp->rx_num_pgs;
 391                 break;
 392         default:
 393                 return -EOPNOTSUPP;
 394         }
 395         return 0;
 396 }
 397
 398 /*
 399  * Dummy handler for Rx offload packets in case we get an offload packet before
 400  * proper processing is setup.  This complains and drops the packet as it isn't
 401  * normal to get offload packets at this stage.
 402  */
 403 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
 404                                 int n)
 405 {
 406         while (n--)
 407                 dev_kfree_skb_any(skbs[n]);
 408         return 0;
 409 }
 410
 411 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
 412 {
 413 }
 414
 415 void cxgb3_set_dummy_ops(struct t3cdev *dev)
 416 {
 417         dev->recv = rx_offload_blackhole;
 418         dev->neigh_update = dummy_neigh_update;
 419 }
 420
 421 /*
 422  * Free an active-open TID.
 423  */
 424 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
 425 {
 426         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 427         union active_open_entry *p = atid2entry(t, atid);
 428         void *ctx = p->t3c_tid.ctx;
 429
 430         spin_lock_bh(&t->atid_lock);
 431         p->next = t->afree;
 432         t->afree = p;
 433         t->atids_in_use--;
 434         spin_unlock_bh(&t->atid_lock);
 435
 436         return ctx;
 437 }
 438
 439 EXPORT_SYMBOL(cxgb3_free_atid);
 440
 441 /*
 442  * Free a server TID and return it to the free pool.
 443  */
 444 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
 445 {
 446         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 447         union listen_entry *p = stid2entry(t, stid);
 448
 449         spin_lock_bh(&t->stid_lock);
 450         p->next = t->sfree;
 451         t->sfree = p;
 452         t->stids_in_use--;
 453         spin_unlock_bh(&t->stid_lock);
 454 }
 455
 456 EXPORT_SYMBOL(cxgb3_free_stid);
 457
 458 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
 459                       void *ctx, unsigned int tid)
 460 {
 461         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 462
 463         t->tid_tab[tid].client = client;
 464         t->tid_tab[tid].ctx = ctx;
 465         atomic_inc(&t->tids_in_use);
 466 }
 467
 468 EXPORT_SYMBOL(cxgb3_insert_tid);
 469
 470 /*
 471  * Populate a TID_RELEASE WR.  The skb must be already propely sized.
 472  */
 473 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
 474 {
 475         struct cpl_tid_release *req;
 476
 477         skb->priority = CPL_PRIORITY_SETUP;
 478         req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
 479         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
 480         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
 481 }
 482
 483 static void t3_process_tid_release_list(struct work_struct *work)
 484 {
 485         struct t3c_data *td = container_of(work, struct t3c_data,
 486                                            tid_release_task);
 487         struct sk_buff *skb;
 488         struct t3cdev *tdev = td->dev;
 489
 490
 491         spin_lock_bh(&td->tid_release_lock);
 492         while (td->tid_release_list) {
 493                 struct t3c_tid_entry *p = td->tid_release_list;
 494
 495                 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
 496                 spin_unlock_bh(&td->tid_release_lock);
 497
 498                 skb = alloc_skb(sizeof(struct cpl_tid_release),
 499                                 GFP_KERNEL | __GFP_NOFAIL);
 500                 mk_tid_release(skb, p - td->tid_maps.tid_tab);
 501                 cxgb3_ofld_send(tdev, skb);
 502                 p->ctx = NULL;
 503                 spin_lock_bh(&td->tid_release_lock);
 504         }
 505         spin_unlock_bh(&td->tid_release_lock);
 506 }
 507
 508 /* use ctx as a next pointer in the tid release list */
 509 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
 510 {
 511         struct t3c_data *td = T3C_DATA(tdev);
 512         struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
 513
 514         spin_lock_bh(&td->tid_release_lock);
 515         p->ctx = (void *)td->tid_release_list;
 516         p->client = NULL;
 517         td->tid_release_list = p;
 518         if (!p->ctx)
 519                 schedule_work(&td->tid_release_task);
 520         spin_unlock_bh(&td->tid_release_lock);
 521 }
 522
 523 EXPORT_SYMBOL(cxgb3_queue_tid_release);
 524
 525 /*
 526  * Remove a tid from the TID table.  A client may defer processing its last
 527  * CPL message if it is locked at the time it arrives, and while the message
 528  * sits in the client's backlog the TID may be reused for another connection.
 529  * To handle this we atomically switch the TID association if it still points
 530  * to the original client context.
 531  */
 532 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
 533 {
 534         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 535
 536         BUG_ON(tid >= t->ntids);
 537         if (tdev->type == T3A)
 538                 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
 539         else {
 540                 struct sk_buff *skb;
 541
 542                 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
 543                 if (likely(skb)) {
 544                         mk_tid_release(skb, tid);
 545                         cxgb3_ofld_send(tdev, skb);
 546                         t->tid_tab[tid].ctx = NULL;
 547                 } else
 548                         cxgb3_queue_tid_release(tdev, tid);
 549         }
 550         atomic_dec(&t->tids_in_use);
 551 }
 552
 553 EXPORT_SYMBOL(cxgb3_remove_tid);
 554
 555 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
 556                      void *ctx)
 557 {
 558         int atid = -1;
 559         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 560
 561         spin_lock_bh(&t->atid_lock);
 562         if (t->afree &&
 563             t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
 564             t->ntids) {
 565                 union active_open_entry *p = t->afree;
 566
 567                 atid = (p - t->atid_tab) + t->atid_base;
 568                 t->afree = p->next;
 569                 p->t3c_tid.ctx = ctx;
 570                 p->t3c_tid.client = client;
 571                 t->atids_in_use++;
 572         }
 573         spin_unlock_bh(&t->atid_lock);
 574         return atid;
 575 }
 576
 577 EXPORT_SYMBOL(cxgb3_alloc_atid);
 578
 579 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
 580                      void *ctx)
 581 {
 582         int stid = -1;
 583         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 584
 585         spin_lock_bh(&t->stid_lock);
 586         if (t->sfree) {
 587                 union listen_entry *p = t->sfree;
 588
 589                 stid = (p - t->stid_tab) + t->stid_base;
 590                 t->sfree = p->next;
 591                 p->t3c_tid.ctx = ctx;
 592                 p->t3c_tid.client = client;
 593                 t->stids_in_use++;
 594         }
 595         spin_unlock_bh(&t->stid_lock);
 596         return stid;
 597 }
 598
 599 EXPORT_SYMBOL(cxgb3_alloc_stid);
 600
 601 /* Get the t3cdev associated with a net_device */
 602 struct t3cdev *dev2t3cdev(struct net_device *dev)
 603 {
 604         const struct port_info *pi = netdev_priv(dev);
 605
 606         return (struct t3cdev *)pi->adapter;
 607 }
 608
 609 EXPORT_SYMBOL(dev2t3cdev);
 610
 611 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 612 {
 613         struct cpl_smt_write_rpl *rpl = cplhdr(skb);
 614
 615         if (rpl->status != CPL_ERR_NONE)
 616                 printk(KERN_ERR
 617                        "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
 618                        rpl->status, GET_TID(rpl));
 619
 620         return CPL_RET_BUF_DONE;
 621 }
 622
 623 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 624 {
 625         struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
 626
 627         if (rpl->status != CPL_ERR_NONE)
 628                 printk(KERN_ERR
 629                        "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
 630                        rpl->status, GET_TID(rpl));
 631
 632         return CPL_RET_BUF_DONE;
 633 }
 634
 635 static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 636 {
 637         struct cpl_rte_write_rpl *rpl = cplhdr(skb);
 638
 639         if (rpl->status != CPL_ERR_NONE)
 640                 printk(KERN_ERR
 641                        "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
 642                        rpl->status, GET_TID(rpl));
 643
 644         return CPL_RET_BUF_DONE;
 645 }
 646
 647 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
 648 {
 649         struct cpl_act_open_rpl *rpl = cplhdr(skb);
 650         unsigned int atid = G_TID(ntohl(rpl->atid));
 651         struct t3c_tid_entry *t3c_tid;
 652
 653         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
 654         if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
 655             t3c_tid->client->handlers &&
 656             t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
 657                 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
 658                                                                     t3c_tid->
 659                                                                     ctx);
 660         } else {
 661                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 662                        dev->name, CPL_ACT_OPEN_RPL);
 663                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 664         }
 665 }
 666
 667 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 668 {
 669         union opcode_tid *p = cplhdr(skb);
 670         unsigned int stid = G_TID(ntohl(p->opcode_tid));
 671         struct t3c_tid_entry *t3c_tid;
 672
 673         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
 674         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 675             t3c_tid->client->handlers[p->opcode]) {
 676                 return t3c_tid->client->handlers[p->opcode] (dev, skb,
 677                                                              t3c_tid->ctx);
 678         } else {
 679                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 680                        dev->name, p->opcode);
 681                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 682         }
 683 }
 684
 685 static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 686 {
 687         union opcode_tid *p = cplhdr(skb);
 688         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 689         struct t3c_tid_entry *t3c_tid;
 690
 691         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 692         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 693             t3c_tid->client->handlers[p->opcode]) {
 694                 return t3c_tid->client->handlers[p->opcode]
 695                     (dev, skb, t3c_tid->ctx);
 696         } else {
 697                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 698                        dev->name, p->opcode);
 699                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 700         }
 701 }
 702
 703 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
 704 {
 705         struct cpl_pass_accept_req *req = cplhdr(skb);
 706         unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 707         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 708         struct t3c_tid_entry *t3c_tid;
 709         unsigned int tid = GET_TID(req);
 710
 711         if (unlikely(tid >= t->ntids)) {
 712                 printk("%s: passive open TID %u too large\n",
 713                        dev->name, tid);
 714                 t3_fatal_err(tdev2adap(dev));
 715                 return CPL_RET_BUF_DONE;
 716         }
 717
 718         t3c_tid = lookup_stid(t, stid);
 719         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 720             t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
 721                 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
 722                     (dev, skb, t3c_tid->ctx);
 723         } else {
 724                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 725                        dev->name, CPL_PASS_ACCEPT_REQ);
 726                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 727         }
 728 }
 729
 730 /*
 731  * Returns an sk_buff for a reply CPL message of size len.  If the input
 732  * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
 733  * is allocated.  The input skb must be of size at least len.  Note that this
 734  * operation does not destroy the original skb data even if it decides to reuse
 735  * the buffer.
 736  */
 737 static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
 738                                                gfp_t gfp)
 739 {
 740         if (likely(!skb_cloned(skb))) {
 741                 BUG_ON(skb->len < len);
 742                 __skb_trim(skb, len);
 743                 skb_get(skb);
 744         } else {
 745                 skb = alloc_skb(len, gfp);
 746                 if (skb)
 747                         __skb_put(skb, len);
 748         }
 749         return skb;
 750 }
 751
 752 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
 753 {
 754         union opcode_tid *p = cplhdr(skb);
 755         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 756         struct t3c_tid_entry *t3c_tid;
 757
 758         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 759         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 760             t3c_tid->client->handlers[p->opcode]) {
 761                 return t3c_tid->client->handlers[p->opcode]
 762                     (dev, skb, t3c_tid->ctx);
 763         } else {
 764                 struct cpl_abort_req_rss *req = cplhdr(skb);
 765                 struct cpl_abort_rpl *rpl;
 766                 struct sk_buff *reply_skb;
 767                 unsigned int tid = GET_TID(req);
 768                 u8 cmd = req->status;
 769
 770                 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
 771                     req->status == CPL_ERR_PERSIST_NEG_ADVICE)
 772                         goto out;
 773
 774                 reply_skb = cxgb3_get_cpl_reply_skb(skb,
 775                                                     sizeof(struct
 776                                                            cpl_abort_rpl),
 777                                                     GFP_ATOMIC);
 778
 779                 if (!reply_skb) {
 780                         printk("do_abort_req_rss: couldn't get skb!\n");
 781                         goto out;
 782                 }
 783                 reply_skb->priority = CPL_PRIORITY_DATA;
 784                 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
 785                 rpl = cplhdr(reply_skb);
 786                 rpl->wr.wr_hi =
 787                     htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
 788                 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
 789                 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
 790                 rpl->cmd = cmd;
 791                 cxgb3_ofld_send(dev, reply_skb);
 792 out:
 793                 return CPL_RET_BUF_DONE;
 794         }
 795 }
 796
 797 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
 798 {
 799         struct cpl_act_establish *req = cplhdr(skb);
 800         unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 801         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 802         struct t3c_tid_entry *t3c_tid;
 803         unsigned int tid = GET_TID(req);
 804
 805         if (unlikely(tid >= t->ntids)) {
 806                 printk("%s: active establish TID %u too large\n",
 807                        dev->name, tid);
 808                 t3_fatal_err(tdev2adap(dev));
 809                 return CPL_RET_BUF_DONE;
 810         }
 811
 812         t3c_tid = lookup_atid(t, atid);
 813         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 814             t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
 815                 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
 816                     (dev, skb, t3c_tid->ctx);
 817         } else {
 818                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 819                        dev->name, CPL_ACT_ESTABLISH);
 820                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 821         }
 822 }
 823
 824 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
 825 {
 826         struct cpl_trace_pkt *p = cplhdr(skb);
 827
 828         skb->protocol = htons(0xffff);
 829         skb->dev = dev->lldev;
 830         skb_pull(skb, sizeof(*p));
 831         skb_reset_mac_header(skb);
 832         netif_receive_skb(skb);
 833         return 0;
 834 }
 835
 836 /*
 837  * That skb would better have come from process_responses() where we abuse
 838  * ->priority and ->csum to carry our data.  NB: if we get to per-arch
 839  * ->csum, the things might get really interesting here.
 840  */
 841
 842 static inline u32 get_hwtid(struct sk_buff *skb)
 843 {
 844         return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
 845 }
 846
 847 static inline u32 get_opcode(struct sk_buff *skb)
 848 {
 849         return G_OPCODE(ntohl((__force __be32)skb->csum));
 850 }
 851
 852 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
 853 {
 854         unsigned int hwtid = get_hwtid(skb);
 855         unsigned int opcode = get_opcode(skb);
 856         struct t3c_tid_entry *t3c_tid;
 857
 858         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 859         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 860             t3c_tid->client->handlers[opcode]) {
 861                 return t3c_tid->client->handlers[opcode] (dev, skb,
 862                                                           t3c_tid->ctx);
 863         } else {
 864                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 865                        dev->name, opcode);
 866                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 867         }
 868 }
 869
 870 static int nb_callback(struct notifier_block *self, unsigned long event,
 871                        void *ctx)
 872 {
 873         switch (event) {
 874         case (NETEVENT_NEIGH_UPDATE):{
 875                 cxgb_neigh_update((struct neighbour *)ctx);
 876                 break;
 877         }
 878         case (NETEVENT_PMTU_UPDATE):
 879                 break;
 880         case (NETEVENT_REDIRECT):{
 881                 struct netevent_redirect *nr = ctx;
 882                 cxgb_redirect(nr->old, nr->new);
 883                 cxgb_neigh_update(nr->new->neighbour);
 884                 break;
 885         }
 886         default:
 887                 break;
 888         }
 889         return 0;
 890 }
 891
 892 static struct notifier_block nb = {
 893         .notifier_call = nb_callback
 894 };
 895
 896 /*
 897  * Process a received packet with an unknown/unexpected CPL opcode.
 898  */
 899 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
 900 {
 901         printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
 902                *skb->data);
 903         return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 904 }
 905
 906 /*
 907  * Handlers for each CPL opcode
 908  */
 909 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
 910
 911 /*
 912  * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
 913  * to unregister an existing handler.
 914  */
 915 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
 916 {
 917         if (opcode < NUM_CPL_CMDS)
 918                 cpl_handlers[opcode] = h ? h : do_bad_cpl;
 919         else
 920                 printk(KERN_ERR "T3C: handler registration for "
 921                        "opcode %x failed\n", opcode);
 922 }
 923
 924 EXPORT_SYMBOL(t3_register_cpl_handler);
 925
 926 /*
 927  * T3CDEV's receive method.
 928  */
 929 int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
 930 {
 931         while (n--) {
 932                 struct sk_buff *skb = *skbs++;
 933                 unsigned int opcode = get_opcode(skb);
 934                 int ret = cpl_handlers[opcode] (dev, skb);
 935
 936 #if VALIDATE_TID
 937                 if (ret & CPL_RET_UNKNOWN_TID) {
 938                         union opcode_tid *p = cplhdr(skb);
 939
 940                         printk(KERN_ERR "%s: CPL message (opcode %u) had "
 941                                "unknown TID %u\n", dev->name, opcode,
 942                                G_TID(ntohl(p->opcode_tid)));
 943                 }
 944 #endif
 945                 if (ret & CPL_RET_BUF_DONE)
 946                         kfree_skb(skb);
 947         }
 948         return 0;
 949 }
 950
 951 /*
 952  * Sends an sk_buff to a T3C driver after dealing with any active network taps.
 953  */
 954 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
 955 {
 956         int r;
 957
 958         local_bh_disable();
 959         r = dev->send(dev, skb);
 960         local_bh_enable();
 961         return r;
 962 }
 963
 964 EXPORT_SYMBOL(cxgb3_ofld_send);
 965
 966 static int is_offloading(struct net_device *dev)
 967 {
 968         struct adapter *adapter;
 969         int i;
 970
 971         read_lock_bh(&adapter_list_lock);
 972         list_for_each_entry(adapter, &adapter_list, adapter_list) {
 973                 for_each_port(adapter, i) {
 974                         if (dev == adapter->port[i]) {
 975                                 read_unlock_bh(&adapter_list_lock);
 976                                 return 1;
 977                         }
 978                 }
 979         }
 980         read_unlock_bh(&adapter_list_lock);
 981         return 0;
 982 }
 983
 984 void cxgb_neigh_update(struct neighbour *neigh)
 985 {
 986         struct net_device *dev = neigh->dev;
 987
 988         if (dev && (is_offloading(dev))) {
 989                 struct t3cdev *tdev = dev2t3cdev(dev);
 990
 991                 BUG_ON(!tdev);
 992                 t3_l2t_update(tdev, neigh);
 993         }
 994 }
 995
 996 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
 997 {
 998         struct sk_buff *skb;
 999         struct cpl_set_tcb_field *req;
1000
1001         skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
1002         if (!skb) {
1003                 printk(KERN_ERR "%s: cannot allocate skb!\n", __FUNCTION__);
1004                 return;
1005         }
1006         skb->priority = CPL_PRIORITY_CONTROL;
1007         req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
1008         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1009         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1010         req->reply = 0;
1011         req->cpu_idx = 0;
1012         req->word = htons(W_TCB_L2T_IX);
1013         req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
1014         req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
1015         tdev->send(tdev, skb);
1016 }
1017
1018 void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
1019 {
1020         struct net_device *olddev, *newdev;
1021         struct tid_info *ti;
1022         struct t3cdev *tdev;
1023         u32 tid;
1024         int update_tcb;
1025         struct l2t_entry *e;
1026         struct t3c_tid_entry *te;
1027
1028         olddev = old->neighbour->dev;
1029         newdev = new->neighbour->dev;
1030         if (!is_offloading(olddev))
1031                 return;
1032         if (!is_offloading(newdev)) {
1033                 printk(KERN_WARNING "%s: Redirect to non-offload "
1034                        "device ignored.\n", __FUNCTION__);
1035                 return;
1036         }
1037         tdev = dev2t3cdev(olddev);
1038         BUG_ON(!tdev);
1039         if (tdev != dev2t3cdev(newdev)) {
1040                 printk(KERN_WARNING "%s: Redirect to different "
1041                        "offload device ignored.\n", __FUNCTION__);
1042                 return;
1043         }
1044
1045         /* Add new L2T entry */
1046         e = t3_l2t_get(tdev, new->neighbour, newdev);
1047         if (!e) {
1048                 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
1049                        __FUNCTION__);
1050                 return;
1051         }
1052
1053         /* Walk tid table and notify clients of dst change. */
1054         ti = &(T3C_DATA(tdev))->tid_maps;
1055         for (tid = 0; tid < ti->ntids; tid++) {
1056                 te = lookup_tid(ti, tid);
1057                 BUG_ON(!te);
1058                 if (te && te->ctx && te->client && te->client->redirect) {
1059                         update_tcb = te->client->redirect(te->ctx, old, new, e);
1060                         if (update_tcb) {
1061                                 l2t_hold(L2DATA(tdev), e);
1062                                 set_l2t_ix(tdev, tid, e);
1063                         }
1064                 }
1065         }
1066         l2t_release(L2DATA(tdev), e);
1067 }
1068
1069 /*
1070  * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1071  * The allocated memory is cleared.
1072  */
1073 void *cxgb_alloc_mem(unsigned long size)
1074 {
1075         void *p = kmalloc(size, GFP_KERNEL);
1076
1077         if (!p)
1078                 p = vmalloc(size);
1079         if (p)
1080                 memset(p, 0, size);
1081         return p;
1082 }
1083
1084 /*
1085  * Free memory allocated through t3_alloc_mem().
1086  */
1087 void cxgb_free_mem(void *addr)
1088 {
1089         if (is_vmalloc_addr(addr))
1090                 vfree(addr);
1091         else
1092                 kfree(addr);
1093 }
1094
1095 /*
1096  * Allocate and initialize the TID tables.  Returns 0 on success.
1097  */
1098 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1099                          unsigned int natids, unsigned int nstids,
1100                          unsigned int atid_base, unsigned int stid_base)
1101 {
1102         unsigned long size = ntids * sizeof(*t->tid_tab) +
1103             natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1104
1105         t->tid_tab = cxgb_alloc_mem(size);
1106         if (!t->tid_tab)
1107                 return -ENOMEM;
1108
1109         t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1110         t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1111         t->ntids = ntids;
1112         t->nstids = nstids;
1113         t->stid_base = stid_base;
1114         t->sfree = NULL;
1115         t->natids = natids;
1116         t->atid_base = atid_base;
1117         t->afree = NULL;
1118         t->stids_in_use = t->atids_in_use = 0;
1119         atomic_set(&t->tids_in_use, 0);
1120         spin_lock_init(&t->stid_lock);
1121         spin_lock_init(&t->atid_lock);
1122
1123         /*
1124          * Setup the free lists for stid_tab and atid_tab.
1125          */
1126         if (nstids) {
1127                 while (--nstids)
1128                         t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1129                 t->sfree = t->stid_tab;
1130         }
1131         if (natids) {
1132                 while (--natids)
1133                         t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1134                 t->afree = t->atid_tab;
1135         }
1136         return 0;
1137 }
1138
1139 static void free_tid_maps(struct tid_info *t)
1140 {
1141         cxgb_free_mem(t->tid_tab);
1142 }
1143
1144 static inline void add_adapter(struct adapter *adap)
1145 {
1146         write_lock_bh(&adapter_list_lock);
1147         list_add_tail(&adap->adapter_list, &adapter_list);
1148         write_unlock_bh(&adapter_list_lock);
1149 }
1150
1151 static inline void remove_adapter(struct adapter *adap)
1152 {
1153         write_lock_bh(&adapter_list_lock);
1154         list_del(&adap->adapter_list);
1155         write_unlock_bh(&adapter_list_lock);
1156 }
1157
1158 int cxgb3_offload_activate(struct adapter *adapter)
1159 {
1160         struct t3cdev *dev = &adapter->tdev;
1161         int natids, err;
1162         struct t3c_data *t;
1163         struct tid_range stid_range, tid_range;
1164         struct mtutab mtutab;
1165         unsigned int l2t_capacity;
1166
1167         t = kcalloc(1, sizeof(*t), GFP_KERNEL);
1168         if (!t)
1169                 return -ENOMEM;
1170
1171         err = -EOPNOTSUPP;
1172         if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1173             dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1174             dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1175             dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1176             dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1177             dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1178                 goto out_free;
1179
1180         err = -ENOMEM;
1181         L2DATA(dev) = t3_init_l2t(l2t_capacity);
1182         if (!L2DATA(dev))
1183                 goto out_free;
1184
1185         natids = min(tid_range.num / 2, MAX_ATIDS);
1186         err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1187                             stid_range.num, ATID_BASE, stid_range.base);
1188         if (err)
1189                 goto out_free_l2t;
1190
1191         t->mtus = mtutab.mtus;
1192         t->nmtus = mtutab.size;
1193
1194         INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1195         spin_lock_init(&t->tid_release_lock);
1196         INIT_LIST_HEAD(&t->list_node);
1197         t->dev = dev;
1198
1199         T3C_DATA(dev) = t;
1200         dev->recv = process_rx;
1201         dev->neigh_update = t3_l2t_update;
1202
1203         /* Register netevent handler once */
1204         if (list_empty(&adapter_list))
1205                 register_netevent_notifier(&nb);
1206
1207         add_adapter(adapter);
1208         return 0;
1209
1210 out_free_l2t:
1211         t3_free_l2t(L2DATA(dev));
1212         L2DATA(dev) = NULL;
1213 out_free:
1214         kfree(t);
1215         return err;
1216 }
1217
1218 void cxgb3_offload_deactivate(struct adapter *adapter)
1219 {
1220         struct t3cdev *tdev = &adapter->tdev;
1221         struct t3c_data *t = T3C_DATA(tdev);
1222
1223         remove_adapter(adapter);
1224         if (list_empty(&adapter_list))
1225                 unregister_netevent_notifier(&nb);
1226
1227         free_tid_maps(&t->tid_maps);
1228         T3C_DATA(tdev) = NULL;
1229         t3_free_l2t(L2DATA(tdev));
1230         L2DATA(tdev) = NULL;
1231         kfree(t);
1232 }
1233
1234 static inline void register_tdev(struct t3cdev *tdev)
1235 {
1236         static int unit;
1237
1238         mutex_lock(&cxgb3_db_lock);
1239         snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1240         list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1241         mutex_unlock(&cxgb3_db_lock);
1242 }
1243
1244 static inline void unregister_tdev(struct t3cdev *tdev)
1245 {
1246         mutex_lock(&cxgb3_db_lock);
1247         list_del(&tdev->ofld_dev_list);
1248         mutex_unlock(&cxgb3_db_lock);
1249 }
1250
1251 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1252 {
1253         struct t3cdev *tdev = &adapter->tdev;
1254
1255         INIT_LIST_HEAD(&tdev->ofld_dev_list);
1256
1257         cxgb3_set_dummy_ops(tdev);
1258         tdev->send = t3_offload_tx;
1259         tdev->ctl = cxgb_offload_ctl;
1260         tdev->type = adapter->params.rev == 0 ? T3A : T3B;
1261
1262         register_tdev(tdev);
1263 }
1264
1265 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1266 {
1267         struct t3cdev *tdev = &adapter->tdev;
1268
1269         tdev->recv = NULL;
1270         tdev->neigh_update = NULL;
1271
1272         unregister_tdev(tdev);
1273 }
1274
1275 void __init cxgb3_offload_init(void)
1276 {
1277         int i;
1278
1279         for (i = 0; i < NUM_CPL_CMDS; ++i)
1280                 cpl_handlers[i] = do_bad_cpl;
1281
1282         t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1283         t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1284         t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
1285         t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1286         t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1287         t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1288         t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1289         t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1290         t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1291         t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1292         t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1293         t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1294         t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1295         t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1296         t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1297         t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1298         t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1299         t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1300         t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1301         t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1302         t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1303         t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1304         t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1305         t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1306         t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1307         t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1308 }