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         case RDMA_GET_MIB: {
 307                 spin_lock(&adapter->stats_lock);
 308                 t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
 309                 spin_unlock(&adapter->stats_lock);
 310                 break;
 311         }
 312         default:
 313                 ret = -EOPNOTSUPP;
 314         }
 315         return ret;
 316 }
 317
 318 static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
 319 {
 320         struct adapter *adapter = tdev2adap(tdev);
 321         struct tid_range *tid;
 322         struct mtutab *mtup;
 323         struct iff_mac *iffmacp;
 324         struct ddp_params *ddpp;
 325         struct adap_ports *ports;
 326         struct ofld_page_info *rx_page_info;
 327         struct tp_params *tp = &adapter->params.tp;
 328         int i;
 329
 330         switch (req) {
 331         case GET_MAX_OUTSTANDING_WR:
 332                 *(unsigned int *)data = FW_WR_NUM;
 333                 break;
 334         case GET_WR_LEN:
 335                 *(unsigned int *)data = WR_FLITS;
 336                 break;
 337         case GET_TX_MAX_CHUNK:
 338                 *(unsigned int *)data = 1 << 20;        /* 1MB */
 339                 break;
 340         case GET_TID_RANGE:
 341                 tid = data;
 342                 tid->num = t3_mc5_size(&adapter->mc5) -
 343                     adapter->params.mc5.nroutes -
 344                     adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
 345                 tid->base = 0;
 346                 break;
 347         case GET_STID_RANGE:
 348                 tid = data;
 349                 tid->num = adapter->params.mc5.nservers;
 350                 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
 351                     adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
 352                 break;
 353         case GET_L2T_CAPACITY:
 354                 *(unsigned int *)data = 2048;
 355                 break;
 356         case GET_MTUS:
 357                 mtup = data;
 358                 mtup->size = NMTUS;
 359                 mtup->mtus = adapter->params.mtus;
 360                 break;
 361         case GET_IFF_FROM_MAC:
 362                 iffmacp = data;
 363                 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
 364                                                 iffmacp->vlan_tag &
 365                                                 VLAN_VID_MASK);
 366                 break;
 367         case GET_DDP_PARAMS:
 368                 ddpp = data;
 369                 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
 370                 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
 371                 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
 372                 break;
 373         case GET_PORTS:
 374                 ports = data;
 375                 ports->nports = adapter->params.nports;
 376                 for_each_port(adapter, i)
 377                         ports->lldevs[i] = adapter->port[i];
 378                 break;
 379         case ULP_ISCSI_GET_PARAMS:
 380         case ULP_ISCSI_SET_PARAMS:
 381                 if (!offload_running(adapter))
 382                         return -EAGAIN;
 383                 return cxgb_ulp_iscsi_ctl(adapter, req, data);
 384         case RDMA_GET_PARAMS:
 385         case RDMA_CQ_OP:
 386         case RDMA_CQ_SETUP:
 387         case RDMA_CQ_DISABLE:
 388         case RDMA_CTRL_QP_SETUP:
 389         case RDMA_GET_MEM:
 390         case RDMA_GET_MIB:
 391                 if (!offload_running(adapter))
 392                         return -EAGAIN;
 393                 return cxgb_rdma_ctl(adapter, req, data);
 394         case GET_RX_PAGE_INFO:
 395                 rx_page_info = data;
 396                 rx_page_info->page_size = tp->rx_pg_size;
 397                 rx_page_info->num = tp->rx_num_pgs;
 398                 break;
 399         default:
 400                 return -EOPNOTSUPP;
 401         }
 402         return 0;
 403 }
 404
 405 /*
 406  * Dummy handler for Rx offload packets in case we get an offload packet before
 407  * proper processing is setup.  This complains and drops the packet as it isn't
 408  * normal to get offload packets at this stage.
 409  */
 410 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
 411                                 int n)
 412 {
 413         while (n--)
 414                 dev_kfree_skb_any(skbs[n]);
 415         return 0;
 416 }
 417
 418 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
 419 {
 420 }
 421
 422 void cxgb3_set_dummy_ops(struct t3cdev *dev)
 423 {
 424         dev->recv = rx_offload_blackhole;
 425         dev->neigh_update = dummy_neigh_update;
 426 }
 427
 428 /*
 429  * Free an active-open TID.
 430  */
 431 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
 432 {
 433         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 434         union active_open_entry *p = atid2entry(t, atid);
 435         void *ctx = p->t3c_tid.ctx;
 436
 437         spin_lock_bh(&t->atid_lock);
 438         p->next = t->afree;
 439         t->afree = p;
 440         t->atids_in_use--;
 441         spin_unlock_bh(&t->atid_lock);
 442
 443         return ctx;
 444 }
 445
 446 EXPORT_SYMBOL(cxgb3_free_atid);
 447
 448 /*
 449  * Free a server TID and return it to the free pool.
 450  */
 451 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
 452 {
 453         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 454         union listen_entry *p = stid2entry(t, stid);
 455
 456         spin_lock_bh(&t->stid_lock);
 457         p->next = t->sfree;
 458         t->sfree = p;
 459         t->stids_in_use--;
 460         spin_unlock_bh(&t->stid_lock);
 461 }
 462
 463 EXPORT_SYMBOL(cxgb3_free_stid);
 464
 465 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
 466                       void *ctx, unsigned int tid)
 467 {
 468         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 469
 470         t->tid_tab[tid].client = client;
 471         t->tid_tab[tid].ctx = ctx;
 472         atomic_inc(&t->tids_in_use);
 473 }
 474
 475 EXPORT_SYMBOL(cxgb3_insert_tid);
 476
 477 /*
 478  * Populate a TID_RELEASE WR.  The skb must be already propely sized.
 479  */
 480 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
 481 {
 482         struct cpl_tid_release *req;
 483
 484         skb->priority = CPL_PRIORITY_SETUP;
 485         req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
 486         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
 487         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
 488 }
 489
 490 static void t3_process_tid_release_list(struct work_struct *work)
 491 {
 492         struct t3c_data *td = container_of(work, struct t3c_data,
 493                                            tid_release_task);
 494         struct sk_buff *skb;
 495         struct t3cdev *tdev = td->dev;
 496
 497
 498         spin_lock_bh(&td->tid_release_lock);
 499         while (td->tid_release_list) {
 500                 struct t3c_tid_entry *p = td->tid_release_list;
 501
 502                 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
 503                 spin_unlock_bh(&td->tid_release_lock);
 504
 505                 skb = alloc_skb(sizeof(struct cpl_tid_release),
 506                                 GFP_KERNEL | __GFP_NOFAIL);
 507                 mk_tid_release(skb, p - td->tid_maps.tid_tab);
 508                 cxgb3_ofld_send(tdev, skb);
 509                 p->ctx = NULL;
 510                 spin_lock_bh(&td->tid_release_lock);
 511         }
 512         spin_unlock_bh(&td->tid_release_lock);
 513 }
 514
 515 /* use ctx as a next pointer in the tid release list */
 516 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
 517 {
 518         struct t3c_data *td = T3C_DATA(tdev);
 519         struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
 520
 521         spin_lock_bh(&td->tid_release_lock);
 522         p->ctx = (void *)td->tid_release_list;
 523         p->client = NULL;
 524         td->tid_release_list = p;
 525         if (!p->ctx)
 526                 schedule_work(&td->tid_release_task);
 527         spin_unlock_bh(&td->tid_release_lock);
 528 }
 529
 530 EXPORT_SYMBOL(cxgb3_queue_tid_release);
 531
 532 /*
 533  * Remove a tid from the TID table.  A client may defer processing its last
 534  * CPL message if it is locked at the time it arrives, and while the message
 535  * sits in the client's backlog the TID may be reused for another connection.
 536  * To handle this we atomically switch the TID association if it still points
 537  * to the original client context.
 538  */
 539 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
 540 {
 541         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 542
 543         BUG_ON(tid >= t->ntids);
 544         if (tdev->type == T3A)
 545                 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
 546         else {
 547                 struct sk_buff *skb;
 548
 549                 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
 550                 if (likely(skb)) {
 551                         mk_tid_release(skb, tid);
 552                         cxgb3_ofld_send(tdev, skb);
 553                         t->tid_tab[tid].ctx = NULL;
 554                 } else
 555                         cxgb3_queue_tid_release(tdev, tid);
 556         }
 557         atomic_dec(&t->tids_in_use);
 558 }
 559
 560 EXPORT_SYMBOL(cxgb3_remove_tid);
 561
 562 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
 563                      void *ctx)
 564 {
 565         int atid = -1;
 566         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 567
 568         spin_lock_bh(&t->atid_lock);
 569         if (t->afree &&
 570             t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
 571             t->ntids) {
 572                 union active_open_entry *p = t->afree;
 573
 574                 atid = (p - t->atid_tab) + t->atid_base;
 575                 t->afree = p->next;
 576                 p->t3c_tid.ctx = ctx;
 577                 p->t3c_tid.client = client;
 578                 t->atids_in_use++;
 579         }
 580         spin_unlock_bh(&t->atid_lock);
 581         return atid;
 582 }
 583
 584 EXPORT_SYMBOL(cxgb3_alloc_atid);
 585
 586 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
 587                      void *ctx)
 588 {
 589         int stid = -1;
 590         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 591
 592         spin_lock_bh(&t->stid_lock);
 593         if (t->sfree) {
 594                 union listen_entry *p = t->sfree;
 595
 596                 stid = (p - t->stid_tab) + t->stid_base;
 597                 t->sfree = p->next;
 598                 p->t3c_tid.ctx = ctx;
 599                 p->t3c_tid.client = client;
 600                 t->stids_in_use++;
 601         }
 602         spin_unlock_bh(&t->stid_lock);
 603         return stid;
 604 }
 605
 606 EXPORT_SYMBOL(cxgb3_alloc_stid);
 607
 608 /* Get the t3cdev associated with a net_device */
 609 struct t3cdev *dev2t3cdev(struct net_device *dev)
 610 {
 611         const struct port_info *pi = netdev_priv(dev);
 612
 613         return (struct t3cdev *)pi->adapter;
 614 }
 615
 616 EXPORT_SYMBOL(dev2t3cdev);
 617
 618 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 619 {
 620         struct cpl_smt_write_rpl *rpl = cplhdr(skb);
 621
 622         if (rpl->status != CPL_ERR_NONE)
 623                 printk(KERN_ERR
 624                        "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
 625                        rpl->status, GET_TID(rpl));
 626
 627         return CPL_RET_BUF_DONE;
 628 }
 629
 630 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 631 {
 632         struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
 633
 634         if (rpl->status != CPL_ERR_NONE)
 635                 printk(KERN_ERR
 636                        "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
 637                        rpl->status, GET_TID(rpl));
 638
 639         return CPL_RET_BUF_DONE;
 640 }
 641
 642 static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 643 {
 644         struct cpl_rte_write_rpl *rpl = cplhdr(skb);
 645
 646         if (rpl->status != CPL_ERR_NONE)
 647                 printk(KERN_ERR
 648                        "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
 649                        rpl->status, GET_TID(rpl));
 650
 651         return CPL_RET_BUF_DONE;
 652 }
 653
 654 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
 655 {
 656         struct cpl_act_open_rpl *rpl = cplhdr(skb);
 657         unsigned int atid = G_TID(ntohl(rpl->atid));
 658         struct t3c_tid_entry *t3c_tid;
 659
 660         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
 661         if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
 662             t3c_tid->client->handlers &&
 663             t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
 664                 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
 665                                                                     t3c_tid->
 666                                                                     ctx);
 667         } else {
 668                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 669                        dev->name, CPL_ACT_OPEN_RPL);
 670                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 671         }
 672 }
 673
 674 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 675 {
 676         union opcode_tid *p = cplhdr(skb);
 677         unsigned int stid = G_TID(ntohl(p->opcode_tid));
 678         struct t3c_tid_entry *t3c_tid;
 679
 680         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
 681         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 682             t3c_tid->client->handlers[p->opcode]) {
 683                 return t3c_tid->client->handlers[p->opcode] (dev, skb,
 684                                                              t3c_tid->ctx);
 685         } else {
 686                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 687                        dev->name, p->opcode);
 688                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 689         }
 690 }
 691
 692 static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 693 {
 694         union opcode_tid *p = cplhdr(skb);
 695         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 696         struct t3c_tid_entry *t3c_tid;
 697
 698         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 699         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 700             t3c_tid->client->handlers[p->opcode]) {
 701                 return t3c_tid->client->handlers[p->opcode]
 702                     (dev, skb, t3c_tid->ctx);
 703         } else {
 704                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 705                        dev->name, p->opcode);
 706                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 707         }
 708 }
 709
 710 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
 711 {
 712         struct cpl_pass_accept_req *req = cplhdr(skb);
 713         unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 714         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 715         struct t3c_tid_entry *t3c_tid;
 716         unsigned int tid = GET_TID(req);
 717
 718         if (unlikely(tid >= t->ntids)) {
 719                 printk("%s: passive open TID %u too large\n",
 720                        dev->name, tid);
 721                 t3_fatal_err(tdev2adap(dev));
 722                 return CPL_RET_BUF_DONE;
 723         }
 724
 725         t3c_tid = lookup_stid(t, stid);
 726         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 727             t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
 728                 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
 729                     (dev, skb, t3c_tid->ctx);
 730         } else {
 731                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 732                        dev->name, CPL_PASS_ACCEPT_REQ);
 733                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 734         }
 735 }
 736
 737 /*
 738  * Returns an sk_buff for a reply CPL message of size len.  If the input
 739  * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
 740  * is allocated.  The input skb must be of size at least len.  Note that this
 741  * operation does not destroy the original skb data even if it decides to reuse
 742  * the buffer.
 743  */
 744 static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
 745                                                gfp_t gfp)
 746 {
 747         if (likely(!skb_cloned(skb))) {
 748                 BUG_ON(skb->len < len);
 749                 __skb_trim(skb, len);
 750                 skb_get(skb);
 751         } else {
 752                 skb = alloc_skb(len, gfp);
 753                 if (skb)
 754                         __skb_put(skb, len);
 755         }
 756         return skb;
 757 }
 758
 759 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
 760 {
 761         union opcode_tid *p = cplhdr(skb);
 762         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 763         struct t3c_tid_entry *t3c_tid;
 764
 765         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 766         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 767             t3c_tid->client->handlers[p->opcode]) {
 768                 return t3c_tid->client->handlers[p->opcode]
 769                     (dev, skb, t3c_tid->ctx);
 770         } else {
 771                 struct cpl_abort_req_rss *req = cplhdr(skb);
 772                 struct cpl_abort_rpl *rpl;
 773                 struct sk_buff *reply_skb;
 774                 unsigned int tid = GET_TID(req);
 775                 u8 cmd = req->status;
 776
 777                 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
 778                     req->status == CPL_ERR_PERSIST_NEG_ADVICE)
 779                         goto out;
 780
 781                 reply_skb = cxgb3_get_cpl_reply_skb(skb,
 782                                                     sizeof(struct
 783                                                            cpl_abort_rpl),
 784                                                     GFP_ATOMIC);
 785
 786                 if (!reply_skb) {
 787                         printk("do_abort_req_rss: couldn't get skb!\n");
 788                         goto out;
 789                 }
 790                 reply_skb->priority = CPL_PRIORITY_DATA;
 791                 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
 792                 rpl = cplhdr(reply_skb);
 793                 rpl->wr.wr_hi =
 794                     htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
 795                 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
 796                 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
 797                 rpl->cmd = cmd;
 798                 cxgb3_ofld_send(dev, reply_skb);
 799 out:
 800                 return CPL_RET_BUF_DONE;
 801         }
 802 }
 803
 804 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
 805 {
 806         struct cpl_act_establish *req = cplhdr(skb);
 807         unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 808         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 809         struct t3c_tid_entry *t3c_tid;
 810         unsigned int tid = GET_TID(req);
 811
 812         if (unlikely(tid >= t->ntids)) {
 813                 printk("%s: active establish TID %u too large\n",
 814                        dev->name, tid);
 815                 t3_fatal_err(tdev2adap(dev));
 816                 return CPL_RET_BUF_DONE;
 817         }
 818
 819         t3c_tid = lookup_atid(t, atid);
 820         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 821             t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
 822                 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
 823                     (dev, skb, t3c_tid->ctx);
 824         } else {
 825                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 826                        dev->name, CPL_ACT_ESTABLISH);
 827                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 828         }
 829 }
 830
 831 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
 832 {
 833         struct cpl_trace_pkt *p = cplhdr(skb);
 834
 835         skb->protocol = htons(0xffff);
 836         skb->dev = dev->lldev;
 837         skb_pull(skb, sizeof(*p));
 838         skb_reset_mac_header(skb);
 839         netif_receive_skb(skb);
 840         return 0;
 841 }
 842
 843 /*
 844  * That skb would better have come from process_responses() where we abuse
 845  * ->priority and ->csum to carry our data.  NB: if we get to per-arch
 846  * ->csum, the things might get really interesting here.
 847  */
 848
 849 static inline u32 get_hwtid(struct sk_buff *skb)
 850 {
 851         return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
 852 }
 853
 854 static inline u32 get_opcode(struct sk_buff *skb)
 855 {
 856         return G_OPCODE(ntohl((__force __be32)skb->csum));
 857 }
 858
 859 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
 860 {
 861         unsigned int hwtid = get_hwtid(skb);
 862         unsigned int opcode = get_opcode(skb);
 863         struct t3c_tid_entry *t3c_tid;
 864
 865         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 866         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 867             t3c_tid->client->handlers[opcode]) {
 868                 return t3c_tid->client->handlers[opcode] (dev, skb,
 869                                                           t3c_tid->ctx);
 870         } else {
 871                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 872                        dev->name, opcode);
 873                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 874         }
 875 }
 876
 877 static int nb_callback(struct notifier_block *self, unsigned long event,
 878                        void *ctx)
 879 {
 880         switch (event) {
 881         case (NETEVENT_NEIGH_UPDATE):{
 882                 cxgb_neigh_update((struct neighbour *)ctx);
 883                 break;
 884         }
 885         case (NETEVENT_PMTU_UPDATE):
 886                 break;
 887         case (NETEVENT_REDIRECT):{
 888                 struct netevent_redirect *nr = ctx;
 889                 cxgb_redirect(nr->old, nr->new);
 890                 cxgb_neigh_update(nr->new->neighbour);
 891                 break;
 892         }
 893         default:
 894                 break;
 895         }
 896         return 0;
 897 }
 898
 899 static struct notifier_block nb = {
 900         .notifier_call = nb_callback
 901 };
 902
 903 /*
 904  * Process a received packet with an unknown/unexpected CPL opcode.
 905  */
 906 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
 907 {
 908         printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
 909                *skb->data);
 910         return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 911 }
 912
 913 /*
 914  * Handlers for each CPL opcode
 915  */
 916 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
 917
 918 /*
 919  * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
 920  * to unregister an existing handler.
 921  */
 922 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
 923 {
 924         if (opcode < NUM_CPL_CMDS)
 925                 cpl_handlers[opcode] = h ? h : do_bad_cpl;
 926         else
 927                 printk(KERN_ERR "T3C: handler registration for "
 928                        "opcode %x failed\n", opcode);
 929 }
 930
 931 EXPORT_SYMBOL(t3_register_cpl_handler);
 932
 933 /*
 934  * T3CDEV's receive method.
 935  */
 936 int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
 937 {
 938         while (n--) {
 939                 struct sk_buff *skb = *skbs++;
 940                 unsigned int opcode = get_opcode(skb);
 941                 int ret = cpl_handlers[opcode] (dev, skb);
 942
 943 #if VALIDATE_TID
 944                 if (ret & CPL_RET_UNKNOWN_TID) {
 945                         union opcode_tid *p = cplhdr(skb);
 946
 947                         printk(KERN_ERR "%s: CPL message (opcode %u) had "
 948                                "unknown TID %u\n", dev->name, opcode,
 949                                G_TID(ntohl(p->opcode_tid)));
 950                 }
 951 #endif
 952                 if (ret & CPL_RET_BUF_DONE)
 953                         kfree_skb(skb);
 954         }
 955         return 0;
 956 }
 957
 958 /*
 959  * Sends an sk_buff to a T3C driver after dealing with any active network taps.
 960  */
 961 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
 962 {
 963         int r;
 964
 965         local_bh_disable();
 966         r = dev->send(dev, skb);
 967         local_bh_enable();
 968         return r;
 969 }
 970
 971 EXPORT_SYMBOL(cxgb3_ofld_send);
 972
 973 static int is_offloading(struct net_device *dev)
 974 {
 975         struct adapter *adapter;
 976         int i;
 977
 978         read_lock_bh(&adapter_list_lock);
 979         list_for_each_entry(adapter, &adapter_list, adapter_list) {
 980                 for_each_port(adapter, i) {
 981                         if (dev == adapter->port[i]) {
 982                                 read_unlock_bh(&adapter_list_lock);
 983                                 return 1;
 984                         }
 985                 }
 986         }
 987         read_unlock_bh(&adapter_list_lock);
 988         return 0;
 989 }
 990
 991 void cxgb_neigh_update(struct neighbour *neigh)
 992 {
 993         struct net_device *dev = neigh->dev;
 994
 995         if (dev && (is_offloading(dev))) {
 996                 struct t3cdev *tdev = dev2t3cdev(dev);
 997
 998                 BUG_ON(!tdev);
 999                 t3_l2t_update(tdev, neigh);
1000         }
1001 }
1002
1003 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
1004 {
1005         struct sk_buff *skb;
1006         struct cpl_set_tcb_field *req;
1007
1008         skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
1009         if (!skb) {
1010                 printk(KERN_ERR "%s: cannot allocate skb!\n", __FUNCTION__);
1011                 return;
1012         }
1013         skb->priority = CPL_PRIORITY_CONTROL;
1014         req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
1015         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1016         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1017         req->reply = 0;
1018         req->cpu_idx = 0;
1019         req->word = htons(W_TCB_L2T_IX);
1020         req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
1021         req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
1022         tdev->send(tdev, skb);
1023 }
1024
1025 void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
1026 {
1027         struct net_device *olddev, *newdev;
1028         struct tid_info *ti;
1029         struct t3cdev *tdev;
1030         u32 tid;
1031         int update_tcb;
1032         struct l2t_entry *e;
1033         struct t3c_tid_entry *te;
1034
1035         olddev = old->neighbour->dev;
1036         newdev = new->neighbour->dev;
1037         if (!is_offloading(olddev))
1038                 return;
1039         if (!is_offloading(newdev)) {
1040                 printk(KERN_WARNING "%s: Redirect to non-offload "
1041                        "device ignored.\n", __FUNCTION__);
1042                 return;
1043         }
1044         tdev = dev2t3cdev(olddev);
1045         BUG_ON(!tdev);
1046         if (tdev != dev2t3cdev(newdev)) {
1047                 printk(KERN_WARNING "%s: Redirect to different "
1048                        "offload device ignored.\n", __FUNCTION__);
1049                 return;
1050         }
1051
1052         /* Add new L2T entry */
1053         e = t3_l2t_get(tdev, new->neighbour, newdev);
1054         if (!e) {
1055                 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
1056                        __FUNCTION__);
1057                 return;
1058         }
1059
1060         /* Walk tid table and notify clients of dst change. */
1061         ti = &(T3C_DATA(tdev))->tid_maps;
1062         for (tid = 0; tid < ti->ntids; tid++) {
1063                 te = lookup_tid(ti, tid);
1064                 BUG_ON(!te);
1065                 if (te && te->ctx && te->client && te->client->redirect) {
1066                         update_tcb = te->client->redirect(te->ctx, old, new, e);
1067                         if (update_tcb) {
1068                                 l2t_hold(L2DATA(tdev), e);
1069                                 set_l2t_ix(tdev, tid, e);
1070                         }
1071                 }
1072         }
1073         l2t_release(L2DATA(tdev), e);
1074 }
1075
1076 /*
1077  * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1078  * The allocated memory is cleared.
1079  */
1080 void *cxgb_alloc_mem(unsigned long size)
1081 {
1082         void *p = kmalloc(size, GFP_KERNEL);
1083
1084         if (!p)
1085                 p = vmalloc(size);
1086         if (p)
1087                 memset(p, 0, size);
1088         return p;
1089 }
1090
1091 /*
1092  * Free memory allocated through t3_alloc_mem().
1093  */
1094 void cxgb_free_mem(void *addr)
1095 {
1096         if (is_vmalloc_addr(addr))
1097                 vfree(addr);
1098         else
1099                 kfree(addr);
1100 }
1101
1102 /*
1103  * Allocate and initialize the TID tables.  Returns 0 on success.
1104  */
1105 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1106                          unsigned int natids, unsigned int nstids,
1107                          unsigned int atid_base, unsigned int stid_base)
1108 {
1109         unsigned long size = ntids * sizeof(*t->tid_tab) +
1110             natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1111
1112         t->tid_tab = cxgb_alloc_mem(size);
1113         if (!t->tid_tab)
1114                 return -ENOMEM;
1115
1116         t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1117         t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1118         t->ntids = ntids;
1119         t->nstids = nstids;
1120         t->stid_base = stid_base;
1121         t->sfree = NULL;
1122         t->natids = natids;
1123         t->atid_base = atid_base;
1124         t->afree = NULL;
1125         t->stids_in_use = t->atids_in_use = 0;
1126         atomic_set(&t->tids_in_use, 0);
1127         spin_lock_init(&t->stid_lock);
1128         spin_lock_init(&t->atid_lock);
1129
1130         /*
1131          * Setup the free lists for stid_tab and atid_tab.
1132          */
1133         if (nstids) {
1134                 while (--nstids)
1135                         t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1136                 t->sfree = t->stid_tab;
1137         }
1138         if (natids) {
1139                 while (--natids)
1140                         t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1141                 t->afree = t->atid_tab;
1142         }
1143         return 0;
1144 }
1145
1146 static void free_tid_maps(struct tid_info *t)
1147 {
1148         cxgb_free_mem(t->tid_tab);
1149 }
1150
1151 static inline void add_adapter(struct adapter *adap)
1152 {
1153         write_lock_bh(&adapter_list_lock);
1154         list_add_tail(&adap->adapter_list, &adapter_list);
1155         write_unlock_bh(&adapter_list_lock);
1156 }
1157
1158 static inline void remove_adapter(struct adapter *adap)
1159 {
1160         write_lock_bh(&adapter_list_lock);
1161         list_del(&adap->adapter_list);
1162         write_unlock_bh(&adapter_list_lock);
1163 }
1164
1165 int cxgb3_offload_activate(struct adapter *adapter)
1166 {
1167         struct t3cdev *dev = &adapter->tdev;
1168         int natids, err;
1169         struct t3c_data *t;
1170         struct tid_range stid_range, tid_range;
1171         struct mtutab mtutab;
1172         unsigned int l2t_capacity;
1173
1174         t = kcalloc(1, sizeof(*t), GFP_KERNEL);
1175         if (!t)
1176                 return -ENOMEM;
1177
1178         err = -EOPNOTSUPP;
1179         if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1180             dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1181             dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1182             dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1183             dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1184             dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1185                 goto out_free;
1186
1187         err = -ENOMEM;
1188         L2DATA(dev) = t3_init_l2t(l2t_capacity);
1189         if (!L2DATA(dev))
1190                 goto out_free;
1191
1192         natids = min(tid_range.num / 2, MAX_ATIDS);
1193         err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1194                             stid_range.num, ATID_BASE, stid_range.base);
1195         if (err)
1196                 goto out_free_l2t;
1197
1198         t->mtus = mtutab.mtus;
1199         t->nmtus = mtutab.size;
1200
1201         INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1202         spin_lock_init(&t->tid_release_lock);
1203         INIT_LIST_HEAD(&t->list_node);
1204         t->dev = dev;
1205
1206         T3C_DATA(dev) = t;
1207         dev->recv = process_rx;
1208         dev->neigh_update = t3_l2t_update;
1209
1210         /* Register netevent handler once */
1211         if (list_empty(&adapter_list))
1212                 register_netevent_notifier(&nb);
1213
1214         add_adapter(adapter);
1215         return 0;
1216
1217 out_free_l2t:
1218         t3_free_l2t(L2DATA(dev));
1219         L2DATA(dev) = NULL;
1220 out_free:
1221         kfree(t);
1222         return err;
1223 }
1224
1225 void cxgb3_offload_deactivate(struct adapter *adapter)
1226 {
1227         struct t3cdev *tdev = &adapter->tdev;
1228         struct t3c_data *t = T3C_DATA(tdev);
1229
1230         remove_adapter(adapter);
1231         if (list_empty(&adapter_list))
1232                 unregister_netevent_notifier(&nb);
1233
1234         free_tid_maps(&t->tid_maps);
1235         T3C_DATA(tdev) = NULL;
1236         t3_free_l2t(L2DATA(tdev));
1237         L2DATA(tdev) = NULL;
1238         kfree(t);
1239 }
1240
1241 static inline void register_tdev(struct t3cdev *tdev)
1242 {
1243         static int unit;
1244
1245         mutex_lock(&cxgb3_db_lock);
1246         snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1247         list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1248         mutex_unlock(&cxgb3_db_lock);
1249 }
1250
1251 static inline void unregister_tdev(struct t3cdev *tdev)
1252 {
1253         mutex_lock(&cxgb3_db_lock);
1254         list_del(&tdev->ofld_dev_list);
1255         mutex_unlock(&cxgb3_db_lock);
1256 }
1257
1258 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1259 {
1260         struct t3cdev *tdev = &adapter->tdev;
1261
1262         INIT_LIST_HEAD(&tdev->ofld_dev_list);
1263
1264         cxgb3_set_dummy_ops(tdev);
1265         tdev->send = t3_offload_tx;
1266         tdev->ctl = cxgb_offload_ctl;
1267         tdev->type = adapter->params.rev == 0 ? T3A : T3B;
1268
1269         register_tdev(tdev);
1270 }
1271
1272 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1273 {
1274         struct t3cdev *tdev = &adapter->tdev;
1275
1276         tdev->recv = NULL;
1277         tdev->neigh_update = NULL;
1278
1279         unregister_tdev(tdev);
1280 }
1281
1282 void __init cxgb3_offload_init(void)
1283 {
1284         int i;
1285
1286         for (i = 0; i < NUM_CPL_CMDS; ++i)
1287                 cpl_handlers[i] = do_bad_cpl;
1288
1289         t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1290         t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1291         t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
1292         t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1293         t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1294         t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1295         t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1296         t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1297         t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1298         t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1299         t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1300         t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1301         t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1302         t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1303         t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1304         t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1305         t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1306         t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1307         t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1308         t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1309         t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1310         t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1311         t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1312         t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1313         t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1314         t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1315 }