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                 /* set MaxRxData and MaxCoalesceSize to 16224 */
 211                 t3_write_reg(adapter, A_TP_PARA_REG2, 0x3f603f60);
 212                 /* program the ddp page sizes */
 213                 {
 214                         int i;
 215                         unsigned int val = 0;
 216                         for (i = 0; i < 4; i++)
 217                                 val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
 218                         if (val)
 219                                 t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
 220                 }
 221                 break;
 222         default:
 223                 ret = -EOPNOTSUPP;
 224         }
 225         return ret;
 226 }
 227
 228 /* Response queue used for RDMA events. */
 229 #define ASYNC_NOTIF_RSPQ 0
 230
 231 static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
 232 {
 233         int ret = 0;
 234
 235         switch (req) {
 236         case RDMA_GET_PARAMS: {
 237                 struct rdma_info *rdma = data;
 238                 struct pci_dev *pdev = adapter->pdev;
 239
 240                 rdma->udbell_physbase = pci_resource_start(pdev, 2);
 241                 rdma->udbell_len = pci_resource_len(pdev, 2);
 242                 rdma->tpt_base =
 243                         t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
 244                 rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
 245                 rdma->pbl_base =
 246                         t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
 247                 rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
 248                 rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
 249                 rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
 250                 rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
 251                 rdma->pdev = pdev;
 252                 break;
 253         }
 254         case RDMA_CQ_OP:{
 255                 unsigned long flags;
 256                 struct rdma_cq_op *rdma = data;
 257
 258                 /* may be called in any context */
 259                 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
 260                 ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
 261                                         rdma->credits);
 262                 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
 263                 break;
 264         }
 265         case RDMA_GET_MEM:{
 266                 struct ch_mem_range *t = data;
 267                 struct mc7 *mem;
 268
 269                 if ((t->addr & 7) || (t->len & 7))
 270                         return -EINVAL;
 271                 if (t->mem_id == MEM_CM)
 272                         mem = &adapter->cm;
 273                 else if (t->mem_id == MEM_PMRX)
 274                         mem = &adapter->pmrx;
 275                 else if (t->mem_id == MEM_PMTX)
 276                         mem = &adapter->pmtx;
 277                 else
 278                         return -EINVAL;
 279
 280                 ret =
 281                         t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
 282                                         (u64 *) t->buf);
 283                 if (ret)
 284                         return ret;
 285                 break;
 286         }
 287         case RDMA_CQ_SETUP:{
 288                 struct rdma_cq_setup *rdma = data;
 289
 290                 spin_lock_irq(&adapter->sge.reg_lock);
 291                 ret =
 292                         t3_sge_init_cqcntxt(adapter, rdma->id,
 293                                         rdma->base_addr, rdma->size,
 294                                         ASYNC_NOTIF_RSPQ,
 295                                         rdma->ovfl_mode, rdma->credits,
 296                                         rdma->credit_thres);
 297                 spin_unlock_irq(&adapter->sge.reg_lock);
 298                 break;
 299         }
 300         case RDMA_CQ_DISABLE:
 301                 spin_lock_irq(&adapter->sge.reg_lock);
 302                 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
 303                 spin_unlock_irq(&adapter->sge.reg_lock);
 304                 break;
 305         case RDMA_CTRL_QP_SETUP:{
 306                 struct rdma_ctrlqp_setup *rdma = data;
 307
 308                 spin_lock_irq(&adapter->sge.reg_lock);
 309                 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
 310                                                 SGE_CNTXT_RDMA,
 311                                                 ASYNC_NOTIF_RSPQ,
 312                                                 rdma->base_addr, rdma->size,
 313                                                 FW_RI_TID_START, 1, 0);
 314                 spin_unlock_irq(&adapter->sge.reg_lock);
 315                 break;
 316         }
 317         case RDMA_GET_MIB: {
 318                 spin_lock(&adapter->stats_lock);
 319                 t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
 320                 spin_unlock(&adapter->stats_lock);
 321                 break;
 322         }
 323         default:
 324                 ret = -EOPNOTSUPP;
 325         }
 326         return ret;
 327 }
 328
 329 static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
 330 {
 331         struct adapter *adapter = tdev2adap(tdev);
 332         struct tid_range *tid;
 333         struct mtutab *mtup;
 334         struct iff_mac *iffmacp;
 335         struct ddp_params *ddpp;
 336         struct adap_ports *ports;
 337         struct ofld_page_info *rx_page_info;
 338         struct tp_params *tp = &adapter->params.tp;
 339         int i;
 340
 341         switch (req) {
 342         case GET_MAX_OUTSTANDING_WR:
 343                 *(unsigned int *)data = FW_WR_NUM;
 344                 break;
 345         case GET_WR_LEN:
 346                 *(unsigned int *)data = WR_FLITS;
 347                 break;
 348         case GET_TX_MAX_CHUNK:
 349                 *(unsigned int *)data = 1 << 20;        /* 1MB */
 350                 break;
 351         case GET_TID_RANGE:
 352                 tid = data;
 353                 tid->num = t3_mc5_size(&adapter->mc5) -
 354                     adapter->params.mc5.nroutes -
 355                     adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
 356                 tid->base = 0;
 357                 break;
 358         case GET_STID_RANGE:
 359                 tid = data;
 360                 tid->num = adapter->params.mc5.nservers;
 361                 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
 362                     adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
 363                 break;
 364         case GET_L2T_CAPACITY:
 365                 *(unsigned int *)data = 2048;
 366                 break;
 367         case GET_MTUS:
 368                 mtup = data;
 369                 mtup->size = NMTUS;
 370                 mtup->mtus = adapter->params.mtus;
 371                 break;
 372         case GET_IFF_FROM_MAC:
 373                 iffmacp = data;
 374                 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
 375                                                 iffmacp->vlan_tag &
 376                                                 VLAN_VID_MASK);
 377                 break;
 378         case GET_DDP_PARAMS:
 379                 ddpp = data;
 380                 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
 381                 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
 382                 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
 383                 break;
 384         case GET_PORTS:
 385                 ports = data;
 386                 ports->nports = adapter->params.nports;
 387                 for_each_port(adapter, i)
 388                         ports->lldevs[i] = adapter->port[i];
 389                 break;
 390         case ULP_ISCSI_GET_PARAMS:
 391         case ULP_ISCSI_SET_PARAMS:
 392                 if (!offload_running(adapter))
 393                         return -EAGAIN;
 394                 return cxgb_ulp_iscsi_ctl(adapter, req, data);
 395         case RDMA_GET_PARAMS:
 396         case RDMA_CQ_OP:
 397         case RDMA_CQ_SETUP:
 398         case RDMA_CQ_DISABLE:
 399         case RDMA_CTRL_QP_SETUP:
 400         case RDMA_GET_MEM:
 401         case RDMA_GET_MIB:
 402                 if (!offload_running(adapter))
 403                         return -EAGAIN;
 404                 return cxgb_rdma_ctl(adapter, req, data);
 405         case GET_RX_PAGE_INFO:
 406                 rx_page_info = data;
 407                 rx_page_info->page_size = tp->rx_pg_size;
 408                 rx_page_info->num = tp->rx_num_pgs;
 409                 break;
 410         default:
 411                 return -EOPNOTSUPP;
 412         }
 413         return 0;
 414 }
 415
 416 /*
 417  * Dummy handler for Rx offload packets in case we get an offload packet before
 418  * proper processing is setup.  This complains and drops the packet as it isn't
 419  * normal to get offload packets at this stage.
 420  */
 421 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
 422                                 int n)
 423 {
 424         while (n--)
 425                 dev_kfree_skb_any(skbs[n]);
 426         return 0;
 427 }
 428
 429 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
 430 {
 431 }
 432
 433 void cxgb3_set_dummy_ops(struct t3cdev *dev)
 434 {
 435         dev->recv = rx_offload_blackhole;
 436         dev->neigh_update = dummy_neigh_update;
 437 }
 438
 439 /*
 440  * Free an active-open TID.
 441  */
 442 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
 443 {
 444         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 445         union active_open_entry *p = atid2entry(t, atid);
 446         void *ctx = p->t3c_tid.ctx;
 447
 448         spin_lock_bh(&t->atid_lock);
 449         p->next = t->afree;
 450         t->afree = p;
 451         t->atids_in_use--;
 452         spin_unlock_bh(&t->atid_lock);
 453
 454         return ctx;
 455 }
 456
 457 EXPORT_SYMBOL(cxgb3_free_atid);
 458
 459 /*
 460  * Free a server TID and return it to the free pool.
 461  */
 462 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
 463 {
 464         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 465         union listen_entry *p = stid2entry(t, stid);
 466
 467         spin_lock_bh(&t->stid_lock);
 468         p->next = t->sfree;
 469         t->sfree = p;
 470         t->stids_in_use--;
 471         spin_unlock_bh(&t->stid_lock);
 472 }
 473
 474 EXPORT_SYMBOL(cxgb3_free_stid);
 475
 476 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
 477                       void *ctx, unsigned int tid)
 478 {
 479         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 480
 481         t->tid_tab[tid].client = client;
 482         t->tid_tab[tid].ctx = ctx;
 483         atomic_inc(&t->tids_in_use);
 484 }
 485
 486 EXPORT_SYMBOL(cxgb3_insert_tid);
 487
 488 /*
 489  * Populate a TID_RELEASE WR.  The skb must be already propely sized.
 490  */
 491 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
 492 {
 493         struct cpl_tid_release *req;
 494
 495         skb->priority = CPL_PRIORITY_SETUP;
 496         req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
 497         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
 498         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
 499 }
 500
 501 static void t3_process_tid_release_list(struct work_struct *work)
 502 {
 503         struct t3c_data *td = container_of(work, struct t3c_data,
 504                                            tid_release_task);
 505         struct sk_buff *skb;
 506         struct t3cdev *tdev = td->dev;
 507
 508
 509         spin_lock_bh(&td->tid_release_lock);
 510         while (td->tid_release_list) {
 511                 struct t3c_tid_entry *p = td->tid_release_list;
 512
 513                 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
 514                 spin_unlock_bh(&td->tid_release_lock);
 515
 516                 skb = alloc_skb(sizeof(struct cpl_tid_release),
 517                                 GFP_KERNEL | __GFP_NOFAIL);
 518                 mk_tid_release(skb, p - td->tid_maps.tid_tab);
 519                 cxgb3_ofld_send(tdev, skb);
 520                 p->ctx = NULL;
 521                 spin_lock_bh(&td->tid_release_lock);
 522         }
 523         spin_unlock_bh(&td->tid_release_lock);
 524 }
 525
 526 /* use ctx as a next pointer in the tid release list */
 527 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
 528 {
 529         struct t3c_data *td = T3C_DATA(tdev);
 530         struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
 531
 532         spin_lock_bh(&td->tid_release_lock);
 533         p->ctx = (void *)td->tid_release_list;
 534         p->client = NULL;
 535         td->tid_release_list = p;
 536         if (!p->ctx)
 537                 schedule_work(&td->tid_release_task);
 538         spin_unlock_bh(&td->tid_release_lock);
 539 }
 540
 541 EXPORT_SYMBOL(cxgb3_queue_tid_release);
 542
 543 /*
 544  * Remove a tid from the TID table.  A client may defer processing its last
 545  * CPL message if it is locked at the time it arrives, and while the message
 546  * sits in the client's backlog the TID may be reused for another connection.
 547  * To handle this we atomically switch the TID association if it still points
 548  * to the original client context.
 549  */
 550 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
 551 {
 552         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 553
 554         BUG_ON(tid >= t->ntids);
 555         if (tdev->type == T3A)
 556                 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
 557         else {
 558                 struct sk_buff *skb;
 559
 560                 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
 561                 if (likely(skb)) {
 562                         mk_tid_release(skb, tid);
 563                         cxgb3_ofld_send(tdev, skb);
 564                         t->tid_tab[tid].ctx = NULL;
 565                 } else
 566                         cxgb3_queue_tid_release(tdev, tid);
 567         }
 568         atomic_dec(&t->tids_in_use);
 569 }
 570
 571 EXPORT_SYMBOL(cxgb3_remove_tid);
 572
 573 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
 574                      void *ctx)
 575 {
 576         int atid = -1;
 577         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 578
 579         spin_lock_bh(&t->atid_lock);
 580         if (t->afree &&
 581             t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
 582             t->ntids) {
 583                 union active_open_entry *p = t->afree;
 584
 585                 atid = (p - t->atid_tab) + t->atid_base;
 586                 t->afree = p->next;
 587                 p->t3c_tid.ctx = ctx;
 588                 p->t3c_tid.client = client;
 589                 t->atids_in_use++;
 590         }
 591         spin_unlock_bh(&t->atid_lock);
 592         return atid;
 593 }
 594
 595 EXPORT_SYMBOL(cxgb3_alloc_atid);
 596
 597 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
 598                      void *ctx)
 599 {
 600         int stid = -1;
 601         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 602
 603         spin_lock_bh(&t->stid_lock);
 604         if (t->sfree) {
 605                 union listen_entry *p = t->sfree;
 606
 607                 stid = (p - t->stid_tab) + t->stid_base;
 608                 t->sfree = p->next;
 609                 p->t3c_tid.ctx = ctx;
 610                 p->t3c_tid.client = client;
 611                 t->stids_in_use++;
 612         }
 613         spin_unlock_bh(&t->stid_lock);
 614         return stid;
 615 }
 616
 617 EXPORT_SYMBOL(cxgb3_alloc_stid);
 618
 619 /* Get the t3cdev associated with a net_device */
 620 struct t3cdev *dev2t3cdev(struct net_device *dev)
 621 {
 622         const struct port_info *pi = netdev_priv(dev);
 623
 624         return (struct t3cdev *)pi->adapter;
 625 }
 626
 627 EXPORT_SYMBOL(dev2t3cdev);
 628
 629 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 630 {
 631         struct cpl_smt_write_rpl *rpl = cplhdr(skb);
 632
 633         if (rpl->status != CPL_ERR_NONE)
 634                 printk(KERN_ERR
 635                        "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
 636                        rpl->status, GET_TID(rpl));
 637
 638         return CPL_RET_BUF_DONE;
 639 }
 640
 641 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 642 {
 643         struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
 644
 645         if (rpl->status != CPL_ERR_NONE)
 646                 printk(KERN_ERR
 647                        "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
 648                        rpl->status, GET_TID(rpl));
 649
 650         return CPL_RET_BUF_DONE;
 651 }
 652
 653 static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 654 {
 655         struct cpl_rte_write_rpl *rpl = cplhdr(skb);
 656
 657         if (rpl->status != CPL_ERR_NONE)
 658                 printk(KERN_ERR
 659                        "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
 660                        rpl->status, GET_TID(rpl));
 661
 662         return CPL_RET_BUF_DONE;
 663 }
 664
 665 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
 666 {
 667         struct cpl_act_open_rpl *rpl = cplhdr(skb);
 668         unsigned int atid = G_TID(ntohl(rpl->atid));
 669         struct t3c_tid_entry *t3c_tid;
 670
 671         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
 672         if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
 673             t3c_tid->client->handlers &&
 674             t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
 675                 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
 676                                                                     t3c_tid->
 677                                                                     ctx);
 678         } else {
 679                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 680                        dev->name, CPL_ACT_OPEN_RPL);
 681                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 682         }
 683 }
 684
 685 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 686 {
 687         union opcode_tid *p = cplhdr(skb);
 688         unsigned int stid = G_TID(ntohl(p->opcode_tid));
 689         struct t3c_tid_entry *t3c_tid;
 690
 691         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
 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] (dev, skb,
 695                                                              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_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 704 {
 705         union opcode_tid *p = cplhdr(skb);
 706         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 707         struct t3c_tid_entry *t3c_tid;
 708
 709         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 710         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 711             t3c_tid->client->handlers[p->opcode]) {
 712                 return t3c_tid->client->handlers[p->opcode]
 713                     (dev, skb, t3c_tid->ctx);
 714         } else {
 715                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 716                        dev->name, p->opcode);
 717                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 718         }
 719 }
 720
 721 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
 722 {
 723         struct cpl_pass_accept_req *req = cplhdr(skb);
 724         unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 725         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 726         struct t3c_tid_entry *t3c_tid;
 727         unsigned int tid = GET_TID(req);
 728
 729         if (unlikely(tid >= t->ntids)) {
 730                 printk("%s: passive open TID %u too large\n",
 731                        dev->name, tid);
 732                 t3_fatal_err(tdev2adap(dev));
 733                 return CPL_RET_BUF_DONE;
 734         }
 735
 736         t3c_tid = lookup_stid(t, stid);
 737         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 738             t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
 739                 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
 740                     (dev, skb, t3c_tid->ctx);
 741         } else {
 742                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 743                        dev->name, CPL_PASS_ACCEPT_REQ);
 744                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 745         }
 746 }
 747
 748 /*
 749  * Returns an sk_buff for a reply CPL message of size len.  If the input
 750  * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
 751  * is allocated.  The input skb must be of size at least len.  Note that this
 752  * operation does not destroy the original skb data even if it decides to reuse
 753  * the buffer.
 754  */
 755 static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
 756                                                gfp_t gfp)
 757 {
 758         if (likely(!skb_cloned(skb))) {
 759                 BUG_ON(skb->len < len);
 760                 __skb_trim(skb, len);
 761                 skb_get(skb);
 762         } else {
 763                 skb = alloc_skb(len, gfp);
 764                 if (skb)
 765                         __skb_put(skb, len);
 766         }
 767         return skb;
 768 }
 769
 770 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
 771 {
 772         union opcode_tid *p = cplhdr(skb);
 773         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 774         struct t3c_tid_entry *t3c_tid;
 775
 776         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 777         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 778             t3c_tid->client->handlers[p->opcode]) {
 779                 return t3c_tid->client->handlers[p->opcode]
 780                     (dev, skb, t3c_tid->ctx);
 781         } else {
 782                 struct cpl_abort_req_rss *req = cplhdr(skb);
 783                 struct cpl_abort_rpl *rpl;
 784                 struct sk_buff *reply_skb;
 785                 unsigned int tid = GET_TID(req);
 786                 u8 cmd = req->status;
 787
 788                 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
 789                     req->status == CPL_ERR_PERSIST_NEG_ADVICE)
 790                         goto out;
 791
 792                 reply_skb = cxgb3_get_cpl_reply_skb(skb,
 793                                                     sizeof(struct
 794                                                            cpl_abort_rpl),
 795                                                     GFP_ATOMIC);
 796
 797                 if (!reply_skb) {
 798                         printk("do_abort_req_rss: couldn't get skb!\n");
 799                         goto out;
 800                 }
 801                 reply_skb->priority = CPL_PRIORITY_DATA;
 802                 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
 803                 rpl = cplhdr(reply_skb);
 804                 rpl->wr.wr_hi =
 805                     htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
 806                 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
 807                 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
 808                 rpl->cmd = cmd;
 809                 cxgb3_ofld_send(dev, reply_skb);
 810 out:
 811                 return CPL_RET_BUF_DONE;
 812         }
 813 }
 814
 815 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
 816 {
 817         struct cpl_act_establish *req = cplhdr(skb);
 818         unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 819         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 820         struct t3c_tid_entry *t3c_tid;
 821         unsigned int tid = GET_TID(req);
 822
 823         if (unlikely(tid >= t->ntids)) {
 824                 printk("%s: active establish TID %u too large\n",
 825                        dev->name, tid);
 826                 t3_fatal_err(tdev2adap(dev));
 827                 return CPL_RET_BUF_DONE;
 828         }
 829
 830         t3c_tid = lookup_atid(t, atid);
 831         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 832             t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
 833                 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
 834                     (dev, skb, t3c_tid->ctx);
 835         } else {
 836                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 837                        dev->name, CPL_ACT_ESTABLISH);
 838                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 839         }
 840 }
 841
 842 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
 843 {
 844         struct cpl_trace_pkt *p = cplhdr(skb);
 845
 846         skb->protocol = htons(0xffff);
 847         skb->dev = dev->lldev;
 848         skb_pull(skb, sizeof(*p));
 849         skb_reset_mac_header(skb);
 850         netif_receive_skb(skb);
 851         return 0;
 852 }
 853
 854 /*
 855  * That skb would better have come from process_responses() where we abuse
 856  * ->priority and ->csum to carry our data.  NB: if we get to per-arch
 857  * ->csum, the things might get really interesting here.
 858  */
 859
 860 static inline u32 get_hwtid(struct sk_buff *skb)
 861 {
 862         return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
 863 }
 864
 865 static inline u32 get_opcode(struct sk_buff *skb)
 866 {
 867         return G_OPCODE(ntohl((__force __be32)skb->csum));
 868 }
 869
 870 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
 871 {
 872         unsigned int hwtid = get_hwtid(skb);
 873         unsigned int opcode = get_opcode(skb);
 874         struct t3c_tid_entry *t3c_tid;
 875
 876         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 877         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 878             t3c_tid->client->handlers[opcode]) {
 879                 return t3c_tid->client->handlers[opcode] (dev, skb,
 880                                                           t3c_tid->ctx);
 881         } else {
 882                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 883                        dev->name, opcode);
 884                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 885         }
 886 }
 887
 888 static int nb_callback(struct notifier_block *self, unsigned long event,
 889                        void *ctx)
 890 {
 891         switch (event) {
 892         case (NETEVENT_NEIGH_UPDATE):{
 893                 cxgb_neigh_update((struct neighbour *)ctx);
 894                 break;
 895         }
 896         case (NETEVENT_PMTU_UPDATE):
 897                 break;
 898         case (NETEVENT_REDIRECT):{
 899                 struct netevent_redirect *nr = ctx;
 900                 cxgb_redirect(nr->old, nr->new);
 901                 cxgb_neigh_update(nr->new->neighbour);
 902                 break;
 903         }
 904         default:
 905                 break;
 906         }
 907         return 0;
 908 }
 909
 910 static struct notifier_block nb = {
 911         .notifier_call = nb_callback
 912 };
 913
 914 /*
 915  * Process a received packet with an unknown/unexpected CPL opcode.
 916  */
 917 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
 918 {
 919         printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
 920                *skb->data);
 921         return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 922 }
 923
 924 /*
 925  * Handlers for each CPL opcode
 926  */
 927 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
 928
 929 /*
 930  * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
 931  * to unregister an existing handler.
 932  */
 933 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
 934 {
 935         if (opcode < NUM_CPL_CMDS)
 936                 cpl_handlers[opcode] = h ? h : do_bad_cpl;
 937         else
 938                 printk(KERN_ERR "T3C: handler registration for "
 939                        "opcode %x failed\n", opcode);
 940 }
 941
 942 EXPORT_SYMBOL(t3_register_cpl_handler);
 943
 944 /*
 945  * T3CDEV's receive method.
 946  */
 947 int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
 948 {
 949         while (n--) {
 950                 struct sk_buff *skb = *skbs++;
 951                 unsigned int opcode = get_opcode(skb);
 952                 int ret = cpl_handlers[opcode] (dev, skb);
 953
 954 #if VALIDATE_TID
 955                 if (ret & CPL_RET_UNKNOWN_TID) {
 956                         union opcode_tid *p = cplhdr(skb);
 957
 958                         printk(KERN_ERR "%s: CPL message (opcode %u) had "
 959                                "unknown TID %u\n", dev->name, opcode,
 960                                G_TID(ntohl(p->opcode_tid)));
 961                 }
 962 #endif
 963                 if (ret & CPL_RET_BUF_DONE)
 964                         kfree_skb(skb);
 965         }
 966         return 0;
 967 }
 968
 969 /*
 970  * Sends an sk_buff to a T3C driver after dealing with any active network taps.
 971  */
 972 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
 973 {
 974         int r;
 975
 976         local_bh_disable();
 977         r = dev->send(dev, skb);
 978         local_bh_enable();
 979         return r;
 980 }
 981
 982 EXPORT_SYMBOL(cxgb3_ofld_send);
 983
 984 static int is_offloading(struct net_device *dev)
 985 {
 986         struct adapter *adapter;
 987         int i;
 988
 989         read_lock_bh(&adapter_list_lock);
 990         list_for_each_entry(adapter, &adapter_list, adapter_list) {
 991                 for_each_port(adapter, i) {
 992                         if (dev == adapter->port[i]) {
 993                                 read_unlock_bh(&adapter_list_lock);
 994                                 return 1;
 995                         }
 996                 }
 997         }
 998         read_unlock_bh(&adapter_list_lock);
 999         return 0;
1000 }
1001
1002 void cxgb_neigh_update(struct neighbour *neigh)
1003 {
1004         struct net_device *dev = neigh->dev;
1005
1006         if (dev && (is_offloading(dev))) {
1007                 struct t3cdev *tdev = dev2t3cdev(dev);
1008
1009                 BUG_ON(!tdev);
1010                 t3_l2t_update(tdev, neigh);
1011         }
1012 }
1013
1014 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
1015 {
1016         struct sk_buff *skb;
1017         struct cpl_set_tcb_field *req;
1018
1019         skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
1020         if (!skb) {
1021                 printk(KERN_ERR "%s: cannot allocate skb!\n", __func__);
1022                 return;
1023         }
1024         skb->priority = CPL_PRIORITY_CONTROL;
1025         req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
1026         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1027         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1028         req->reply = 0;
1029         req->cpu_idx = 0;
1030         req->word = htons(W_TCB_L2T_IX);
1031         req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
1032         req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
1033         tdev->send(tdev, skb);
1034 }
1035
1036 void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
1037 {
1038         struct net_device *olddev, *newdev;
1039         struct tid_info *ti;
1040         struct t3cdev *tdev;
1041         u32 tid;
1042         int update_tcb;
1043         struct l2t_entry *e;
1044         struct t3c_tid_entry *te;
1045
1046         olddev = old->neighbour->dev;
1047         newdev = new->neighbour->dev;
1048         if (!is_offloading(olddev))
1049                 return;
1050         if (!is_offloading(newdev)) {
1051                 printk(KERN_WARNING "%s: Redirect to non-offload "
1052                        "device ignored.\n", __func__);
1053                 return;
1054         }
1055         tdev = dev2t3cdev(olddev);
1056         BUG_ON(!tdev);
1057         if (tdev != dev2t3cdev(newdev)) {
1058                 printk(KERN_WARNING "%s: Redirect to different "
1059                        "offload device ignored.\n", __func__);
1060                 return;
1061         }
1062
1063         /* Add new L2T entry */
1064         e = t3_l2t_get(tdev, new->neighbour, newdev);
1065         if (!e) {
1066                 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
1067                        __func__);
1068                 return;
1069         }
1070
1071         /* Walk tid table and notify clients of dst change. */
1072         ti = &(T3C_DATA(tdev))->tid_maps;
1073         for (tid = 0; tid < ti->ntids; tid++) {
1074                 te = lookup_tid(ti, tid);
1075                 BUG_ON(!te);
1076                 if (te && te->ctx && te->client && te->client->redirect) {
1077                         update_tcb = te->client->redirect(te->ctx, old, new, e);
1078                         if (update_tcb) {
1079                                 l2t_hold(L2DATA(tdev), e);
1080                                 set_l2t_ix(tdev, tid, e);
1081                         }
1082                 }
1083         }
1084         l2t_release(L2DATA(tdev), e);
1085 }
1086
1087 /*
1088  * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1089  * The allocated memory is cleared.
1090  */
1091 void *cxgb_alloc_mem(unsigned long size)
1092 {
1093         void *p = kmalloc(size, GFP_KERNEL);
1094
1095         if (!p)
1096                 p = vmalloc(size);
1097         if (p)
1098                 memset(p, 0, size);
1099         return p;
1100 }
1101
1102 /*
1103  * Free memory allocated through t3_alloc_mem().
1104  */
1105 void cxgb_free_mem(void *addr)
1106 {
1107         if (is_vmalloc_addr(addr))
1108                 vfree(addr);
1109         else
1110                 kfree(addr);
1111 }
1112
1113 /*
1114  * Allocate and initialize the TID tables.  Returns 0 on success.
1115  */
1116 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1117                          unsigned int natids, unsigned int nstids,
1118                          unsigned int atid_base, unsigned int stid_base)
1119 {
1120         unsigned long size = ntids * sizeof(*t->tid_tab) +
1121             natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1122
1123         t->tid_tab = cxgb_alloc_mem(size);
1124         if (!t->tid_tab)
1125                 return -ENOMEM;
1126
1127         t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1128         t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1129         t->ntids = ntids;
1130         t->nstids = nstids;
1131         t->stid_base = stid_base;
1132         t->sfree = NULL;
1133         t->natids = natids;
1134         t->atid_base = atid_base;
1135         t->afree = NULL;
1136         t->stids_in_use = t->atids_in_use = 0;
1137         atomic_set(&t->tids_in_use, 0);
1138         spin_lock_init(&t->stid_lock);
1139         spin_lock_init(&t->atid_lock);
1140
1141         /*
1142          * Setup the free lists for stid_tab and atid_tab.
1143          */
1144         if (nstids) {
1145                 while (--nstids)
1146                         t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1147                 t->sfree = t->stid_tab;
1148         }
1149         if (natids) {
1150                 while (--natids)
1151                         t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1152                 t->afree = t->atid_tab;
1153         }
1154         return 0;
1155 }
1156
1157 static void free_tid_maps(struct tid_info *t)
1158 {
1159         cxgb_free_mem(t->tid_tab);
1160 }
1161
1162 static inline void add_adapter(struct adapter *adap)
1163 {
1164         write_lock_bh(&adapter_list_lock);
1165         list_add_tail(&adap->adapter_list, &adapter_list);
1166         write_unlock_bh(&adapter_list_lock);
1167 }
1168
1169 static inline void remove_adapter(struct adapter *adap)
1170 {
1171         write_lock_bh(&adapter_list_lock);
1172         list_del(&adap->adapter_list);
1173         write_unlock_bh(&adapter_list_lock);
1174 }
1175
1176 int cxgb3_offload_activate(struct adapter *adapter)
1177 {
1178         struct t3cdev *dev = &adapter->tdev;
1179         int natids, err;
1180         struct t3c_data *t;
1181         struct tid_range stid_range, tid_range;
1182         struct mtutab mtutab;
1183         unsigned int l2t_capacity;
1184
1185         t = kcalloc(1, sizeof(*t), GFP_KERNEL);
1186         if (!t)
1187                 return -ENOMEM;
1188
1189         err = -EOPNOTSUPP;
1190         if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1191             dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1192             dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1193             dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1194             dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1195             dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1196                 goto out_free;
1197
1198         err = -ENOMEM;
1199         L2DATA(dev) = t3_init_l2t(l2t_capacity);
1200         if (!L2DATA(dev))
1201                 goto out_free;
1202
1203         natids = min(tid_range.num / 2, MAX_ATIDS);
1204         err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1205                             stid_range.num, ATID_BASE, stid_range.base);
1206         if (err)
1207                 goto out_free_l2t;
1208
1209         t->mtus = mtutab.mtus;
1210         t->nmtus = mtutab.size;
1211
1212         INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1213         spin_lock_init(&t->tid_release_lock);
1214         INIT_LIST_HEAD(&t->list_node);
1215         t->dev = dev;
1216
1217         T3C_DATA(dev) = t;
1218         dev->recv = process_rx;
1219         dev->neigh_update = t3_l2t_update;
1220
1221         /* Register netevent handler once */
1222         if (list_empty(&adapter_list))
1223                 register_netevent_notifier(&nb);
1224
1225         add_adapter(adapter);
1226         return 0;
1227
1228 out_free_l2t:
1229         t3_free_l2t(L2DATA(dev));
1230         L2DATA(dev) = NULL;
1231 out_free:
1232         kfree(t);
1233         return err;
1234 }
1235
1236 void cxgb3_offload_deactivate(struct adapter *adapter)
1237 {
1238         struct t3cdev *tdev = &adapter->tdev;
1239         struct t3c_data *t = T3C_DATA(tdev);
1240
1241         remove_adapter(adapter);
1242         if (list_empty(&adapter_list))
1243                 unregister_netevent_notifier(&nb);
1244
1245         free_tid_maps(&t->tid_maps);
1246         T3C_DATA(tdev) = NULL;
1247         t3_free_l2t(L2DATA(tdev));
1248         L2DATA(tdev) = NULL;
1249         kfree(t);
1250 }
1251
1252 static inline void register_tdev(struct t3cdev *tdev)
1253 {
1254         static int unit;
1255
1256         mutex_lock(&cxgb3_db_lock);
1257         snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1258         list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1259         mutex_unlock(&cxgb3_db_lock);
1260 }
1261
1262 static inline void unregister_tdev(struct t3cdev *tdev)
1263 {
1264         mutex_lock(&cxgb3_db_lock);
1265         list_del(&tdev->ofld_dev_list);
1266         mutex_unlock(&cxgb3_db_lock);
1267 }
1268
1269 static inline int adap2type(struct adapter *adapter)
1270 {
1271         int type = 0;
1272
1273         switch (adapter->params.rev) {
1274         case T3_REV_A:
1275                 type = T3A;
1276                 break;
1277         case T3_REV_B:
1278         case T3_REV_B2:
1279                 type = T3B;
1280                 break;
1281         case T3_REV_C:
1282                 type = T3C;
1283                 break;
1284         }
1285         return type;
1286 }
1287
1288 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1289 {
1290         struct t3cdev *tdev = &adapter->tdev;
1291
1292         INIT_LIST_HEAD(&tdev->ofld_dev_list);
1293
1294         cxgb3_set_dummy_ops(tdev);
1295         tdev->send = t3_offload_tx;
1296         tdev->ctl = cxgb_offload_ctl;
1297         tdev->type = adap2type(adapter);
1298
1299         register_tdev(tdev);
1300 }
1301
1302 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1303 {
1304         struct t3cdev *tdev = &adapter->tdev;
1305
1306         tdev->recv = NULL;
1307         tdev->neigh_update = NULL;
1308
1309         unregister_tdev(tdev);
1310 }
1311
1312 void __init cxgb3_offload_init(void)
1313 {
1314         int i;
1315
1316         for (i = 0; i < NUM_CPL_CMDS; ++i)
1317                 cpl_handlers[i] = do_bad_cpl;
1318
1319         t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1320         t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1321         t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
1322         t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1323         t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1324         t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1325         t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1326         t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1327         t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1328         t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1329         t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1330         t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1331         t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1332         t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1333         t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1334         t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1335         t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1336         t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1337         t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1338         t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1339         t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1340         t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1341         t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1342         t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1343         t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1344         t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1345 }