drivers/net/cxgb3/cxgb3_offload.c

   1 /*
   2  * Copyright (c) 2006-2008 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 void cxgb3_err_notify(struct t3cdev *tdev, u32 status, u32 error)
 157 {
 158         struct cxgb3_client *client;
 159
 160         mutex_lock(&cxgb3_db_lock);
 161         list_for_each_entry(client, &client_list, client_list) {
 162                 if (client->err_handler)
 163                         client->err_handler(tdev, status, error);
 164         }
 165         mutex_unlock(&cxgb3_db_lock);
 166 }
 167
 168 static struct net_device *get_iff_from_mac(struct adapter *adapter,
 169                                            const unsigned char *mac,
 170                                            unsigned int vlan)
 171 {
 172         int i;
 173
 174         for_each_port(adapter, i) {
 175                 struct vlan_group *grp;
 176                 struct net_device *dev = adapter->port[i];
 177                 const struct port_info *p = netdev_priv(dev);
 178
 179                 if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) {
 180                         if (vlan && vlan != VLAN_VID_MASK) {
 181                                 grp = p->vlan_grp;
 182                                 dev = NULL;
 183                                 if (grp)
 184                                         dev = vlan_group_get_device(grp, vlan);
 185                         } else
 186                                 while (dev->master)
 187                                         dev = dev->master;
 188                         return dev;
 189                 }
 190         }
 191         return NULL;
 192 }
 193
 194 static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
 195                               void *data)
 196 {
 197         int i;
 198         int ret = 0;
 199         unsigned int val = 0;
 200         struct ulp_iscsi_info *uiip = data;
 201
 202         switch (req) {
 203         case ULP_ISCSI_GET_PARAMS:
 204                 uiip->pdev = adapter->pdev;
 205                 uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
 206                 uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
 207                 uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
 208
 209                 val = t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ);
 210                 for (i = 0; i < 4; i++, val >>= 8)
 211                         uiip->pgsz_factor[i] = val & 0xFF;
 212
 213                 val = t3_read_reg(adapter, A_TP_PARA_REG7);
 214                 uiip->max_txsz =
 215                 uiip->max_rxsz = min((val >> S_PMMAXXFERLEN0)&M_PMMAXXFERLEN0,
 216                                      (val >> S_PMMAXXFERLEN1)&M_PMMAXXFERLEN1);
 217                 /*
 218                  * On tx, the iscsi pdu has to be <= tx page size and has to
 219                  * fit into the Tx PM FIFO.
 220                  */
 221                 val = min(adapter->params.tp.tx_pg_size,
 222                           t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
 223                 uiip->max_txsz = min(val, uiip->max_txsz);
 224
 225                 /* set MaxRxData to 16224 */
 226                 val = t3_read_reg(adapter, A_TP_PARA_REG2);
 227                 if ((val >> S_MAXRXDATA) != 0x3f60) {
 228                         val &= (M_RXCOALESCESIZE << S_RXCOALESCESIZE);
 229                         val |= V_MAXRXDATA(0x3f60);
 230                         printk(KERN_INFO
 231                                 "%s, iscsi set MaxRxData to 16224 (0x%x).\n",
 232                                 adapter->name, val);
 233                         t3_write_reg(adapter, A_TP_PARA_REG2, val);
 234                 }
 235
 236                 /*
 237                  * on rx, the iscsi pdu has to be < rx page size and the
 238                  * the max rx data length programmed in TP
 239                  */
 240                 val = min(adapter->params.tp.rx_pg_size,
 241                           ((t3_read_reg(adapter, A_TP_PARA_REG2)) >>
 242                                 S_MAXRXDATA) & M_MAXRXDATA);
 243                 uiip->max_rxsz = min(val, uiip->max_rxsz);
 244                 break;
 245         case ULP_ISCSI_SET_PARAMS:
 246                 t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
 247                 /* program the ddp page sizes */
 248                 for (i = 0; i < 4; i++)
 249                         val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
 250                 if (val && (val != t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ))) {
 251                         printk(KERN_INFO
 252                                 "%s, setting iscsi pgsz 0x%x, %u,%u,%u,%u.\n",
 253                                 adapter->name, val, uiip->pgsz_factor[0],
 254                                 uiip->pgsz_factor[1], uiip->pgsz_factor[2],
 255                                 uiip->pgsz_factor[3]);
 256                         t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
 257                 }
 258                 break;
 259         default:
 260                 ret = -EOPNOTSUPP;
 261         }
 262         return ret;
 263 }
 264
 265 /* Response queue used for RDMA events. */
 266 #define ASYNC_NOTIF_RSPQ 0
 267
 268 static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
 269 {
 270         int ret = 0;
 271
 272         switch (req) {
 273         case RDMA_GET_PARAMS: {
 274                 struct rdma_info *rdma = data;
 275                 struct pci_dev *pdev = adapter->pdev;
 276
 277                 rdma->udbell_physbase = pci_resource_start(pdev, 2);
 278                 rdma->udbell_len = pci_resource_len(pdev, 2);
 279                 rdma->tpt_base =
 280                         t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
 281                 rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
 282                 rdma->pbl_base =
 283                         t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
 284                 rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
 285                 rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
 286                 rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
 287                 rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
 288                 rdma->pdev = pdev;
 289                 break;
 290         }
 291         case RDMA_CQ_OP:{
 292                 unsigned long flags;
 293                 struct rdma_cq_op *rdma = data;
 294
 295                 /* may be called in any context */
 296                 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
 297                 ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
 298                                         rdma->credits);
 299                 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
 300                 break;
 301         }
 302         case RDMA_GET_MEM:{
 303                 struct ch_mem_range *t = data;
 304                 struct mc7 *mem;
 305
 306                 if ((t->addr & 7) || (t->len & 7))
 307                         return -EINVAL;
 308                 if (t->mem_id == MEM_CM)
 309                         mem = &adapter->cm;
 310                 else if (t->mem_id == MEM_PMRX)
 311                         mem = &adapter->pmrx;
 312                 else if (t->mem_id == MEM_PMTX)
 313                         mem = &adapter->pmtx;
 314                 else
 315                         return -EINVAL;
 316
 317                 ret =
 318                         t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
 319                                         (u64 *) t->buf);
 320                 if (ret)
 321                         return ret;
 322                 break;
 323         }
 324         case RDMA_CQ_SETUP:{
 325                 struct rdma_cq_setup *rdma = data;
 326
 327                 spin_lock_irq(&adapter->sge.reg_lock);
 328                 ret =
 329                         t3_sge_init_cqcntxt(adapter, rdma->id,
 330                                         rdma->base_addr, rdma->size,
 331                                         ASYNC_NOTIF_RSPQ,
 332                                         rdma->ovfl_mode, rdma->credits,
 333                                         rdma->credit_thres);
 334                 spin_unlock_irq(&adapter->sge.reg_lock);
 335                 break;
 336         }
 337         case RDMA_CQ_DISABLE:
 338                 spin_lock_irq(&adapter->sge.reg_lock);
 339                 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
 340                 spin_unlock_irq(&adapter->sge.reg_lock);
 341                 break;
 342         case RDMA_CTRL_QP_SETUP:{
 343                 struct rdma_ctrlqp_setup *rdma = data;
 344
 345                 spin_lock_irq(&adapter->sge.reg_lock);
 346                 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
 347                                                 SGE_CNTXT_RDMA,
 348                                                 ASYNC_NOTIF_RSPQ,
 349                                                 rdma->base_addr, rdma->size,
 350                                                 FW_RI_TID_START, 1, 0);
 351                 spin_unlock_irq(&adapter->sge.reg_lock);
 352                 break;
 353         }
 354         case RDMA_GET_MIB: {
 355                 spin_lock(&adapter->stats_lock);
 356                 t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
 357                 spin_unlock(&adapter->stats_lock);
 358                 break;
 359         }
 360         default:
 361                 ret = -EOPNOTSUPP;
 362         }
 363         return ret;
 364 }
 365
 366 static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
 367 {
 368         struct adapter *adapter = tdev2adap(tdev);
 369         struct tid_range *tid;
 370         struct mtutab *mtup;
 371         struct iff_mac *iffmacp;
 372         struct ddp_params *ddpp;
 373         struct adap_ports *ports;
 374         struct ofld_page_info *rx_page_info;
 375         struct tp_params *tp = &adapter->params.tp;
 376         int i;
 377
 378         switch (req) {
 379         case GET_MAX_OUTSTANDING_WR:
 380                 *(unsigned int *)data = FW_WR_NUM;
 381                 break;
 382         case GET_WR_LEN:
 383                 *(unsigned int *)data = WR_FLITS;
 384                 break;
 385         case GET_TX_MAX_CHUNK:
 386                 *(unsigned int *)data = 1 << 20;        /* 1MB */
 387                 break;
 388         case GET_TID_RANGE:
 389                 tid = data;
 390                 tid->num = t3_mc5_size(&adapter->mc5) -
 391                     adapter->params.mc5.nroutes -
 392                     adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
 393                 tid->base = 0;
 394                 break;
 395         case GET_STID_RANGE:
 396                 tid = data;
 397                 tid->num = adapter->params.mc5.nservers;
 398                 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
 399                     adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
 400                 break;
 401         case GET_L2T_CAPACITY:
 402                 *(unsigned int *)data = 2048;
 403                 break;
 404         case GET_MTUS:
 405                 mtup = data;
 406                 mtup->size = NMTUS;
 407                 mtup->mtus = adapter->params.mtus;
 408                 break;
 409         case GET_IFF_FROM_MAC:
 410                 iffmacp = data;
 411                 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
 412                                                 iffmacp->vlan_tag &
 413                                                 VLAN_VID_MASK);
 414                 break;
 415         case GET_DDP_PARAMS:
 416                 ddpp = data;
 417                 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
 418                 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
 419                 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
 420                 break;
 421         case GET_PORTS:
 422                 ports = data;
 423                 ports->nports = adapter->params.nports;
 424                 for_each_port(adapter, i)
 425                         ports->lldevs[i] = adapter->port[i];
 426                 break;
 427         case ULP_ISCSI_GET_PARAMS:
 428         case ULP_ISCSI_SET_PARAMS:
 429                 if (!offload_running(adapter))
 430                         return -EAGAIN;
 431                 return cxgb_ulp_iscsi_ctl(adapter, req, data);
 432         case RDMA_GET_PARAMS:
 433         case RDMA_CQ_OP:
 434         case RDMA_CQ_SETUP:
 435         case RDMA_CQ_DISABLE:
 436         case RDMA_CTRL_QP_SETUP:
 437         case RDMA_GET_MEM:
 438         case RDMA_GET_MIB:
 439                 if (!offload_running(adapter))
 440                         return -EAGAIN;
 441                 return cxgb_rdma_ctl(adapter, req, data);
 442         case GET_RX_PAGE_INFO:
 443                 rx_page_info = data;
 444                 rx_page_info->page_size = tp->rx_pg_size;
 445                 rx_page_info->num = tp->rx_num_pgs;
 446                 break;
 447         case GET_ISCSI_IPV4ADDR: {
 448                 struct iscsi_ipv4addr *p = data;
 449                 struct port_info *pi = netdev_priv(p->dev);
 450                 p->ipv4addr = pi->iscsi_ipv4addr;
 451                 break;
 452         }
 453         case GET_EMBEDDED_INFO: {
 454                 struct ch_embedded_info *e = data;
 455
 456                 spin_lock(&adapter->stats_lock);
 457                 t3_get_fw_version(adapter, &e->fw_vers);
 458                 t3_get_tp_version(adapter, &e->tp_vers);
 459                 spin_unlock(&adapter->stats_lock);
 460                 break;
 461         }
 462         default:
 463                 return -EOPNOTSUPP;
 464         }
 465         return 0;
 466 }
 467
 468 /*
 469  * Dummy handler for Rx offload packets in case we get an offload packet before
 470  * proper processing is setup.  This complains and drops the packet as it isn't
 471  * normal to get offload packets at this stage.
 472  */
 473 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
 474                                 int n)
 475 {
 476         while (n--)
 477                 dev_kfree_skb_any(skbs[n]);
 478         return 0;
 479 }
 480
 481 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
 482 {
 483 }
 484
 485 void cxgb3_set_dummy_ops(struct t3cdev *dev)
 486 {
 487         dev->recv = rx_offload_blackhole;
 488         dev->neigh_update = dummy_neigh_update;
 489 }
 490
 491 /*
 492  * Free an active-open TID.
 493  */
 494 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
 495 {
 496         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 497         union active_open_entry *p = atid2entry(t, atid);
 498         void *ctx = p->t3c_tid.ctx;
 499
 500         spin_lock_bh(&t->atid_lock);
 501         p->next = t->afree;
 502         t->afree = p;
 503         t->atids_in_use--;
 504         spin_unlock_bh(&t->atid_lock);
 505
 506         return ctx;
 507 }
 508
 509 EXPORT_SYMBOL(cxgb3_free_atid);
 510
 511 /*
 512  * Free a server TID and return it to the free pool.
 513  */
 514 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
 515 {
 516         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 517         union listen_entry *p = stid2entry(t, stid);
 518
 519         spin_lock_bh(&t->stid_lock);
 520         p->next = t->sfree;
 521         t->sfree = p;
 522         t->stids_in_use--;
 523         spin_unlock_bh(&t->stid_lock);
 524 }
 525
 526 EXPORT_SYMBOL(cxgb3_free_stid);
 527
 528 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
 529                       void *ctx, unsigned int tid)
 530 {
 531         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 532
 533         t->tid_tab[tid].client = client;
 534         t->tid_tab[tid].ctx = ctx;
 535         atomic_inc(&t->tids_in_use);
 536 }
 537
 538 EXPORT_SYMBOL(cxgb3_insert_tid);
 539
 540 /*
 541  * Populate a TID_RELEASE WR.  The skb must be already propely sized.
 542  */
 543 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
 544 {
 545         struct cpl_tid_release *req;
 546
 547         skb->priority = CPL_PRIORITY_SETUP;
 548         req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
 549         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
 550         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
 551 }
 552
 553 static void t3_process_tid_release_list(struct work_struct *work)
 554 {
 555         struct t3c_data *td = container_of(work, struct t3c_data,
 556                                            tid_release_task);
 557         struct sk_buff *skb;
 558         struct t3cdev *tdev = td->dev;
 559
 560
 561         spin_lock_bh(&td->tid_release_lock);
 562         while (td->tid_release_list) {
 563                 struct t3c_tid_entry *p = td->tid_release_list;
 564
 565                 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
 566                 spin_unlock_bh(&td->tid_release_lock);
 567
 568                 skb = alloc_skb(sizeof(struct cpl_tid_release),
 569                                 GFP_KERNEL | __GFP_NOFAIL);
 570                 mk_tid_release(skb, p - td->tid_maps.tid_tab);
 571                 cxgb3_ofld_send(tdev, skb);
 572                 p->ctx = NULL;
 573                 spin_lock_bh(&td->tid_release_lock);
 574         }
 575         spin_unlock_bh(&td->tid_release_lock);
 576 }
 577
 578 /* use ctx as a next pointer in the tid release list */
 579 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
 580 {
 581         struct t3c_data *td = T3C_DATA(tdev);
 582         struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
 583
 584         spin_lock_bh(&td->tid_release_lock);
 585         p->ctx = (void *)td->tid_release_list;
 586         p->client = NULL;
 587         td->tid_release_list = p;
 588         if (!p->ctx)
 589                 schedule_work(&td->tid_release_task);
 590         spin_unlock_bh(&td->tid_release_lock);
 591 }
 592
 593 EXPORT_SYMBOL(cxgb3_queue_tid_release);
 594
 595 /*
 596  * Remove a tid from the TID table.  A client may defer processing its last
 597  * CPL message if it is locked at the time it arrives, and while the message
 598  * sits in the client's backlog the TID may be reused for another connection.
 599  * To handle this we atomically switch the TID association if it still points
 600  * to the original client context.
 601  */
 602 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
 603 {
 604         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 605
 606         BUG_ON(tid >= t->ntids);
 607         if (tdev->type == T3A)
 608                 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
 609         else {
 610                 struct sk_buff *skb;
 611
 612                 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
 613                 if (likely(skb)) {
 614                         mk_tid_release(skb, tid);
 615                         cxgb3_ofld_send(tdev, skb);
 616                         t->tid_tab[tid].ctx = NULL;
 617                 } else
 618                         cxgb3_queue_tid_release(tdev, tid);
 619         }
 620         atomic_dec(&t->tids_in_use);
 621 }
 622
 623 EXPORT_SYMBOL(cxgb3_remove_tid);
 624
 625 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
 626                      void *ctx)
 627 {
 628         int atid = -1;
 629         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 630
 631         spin_lock_bh(&t->atid_lock);
 632         if (t->afree &&
 633             t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
 634             t->ntids) {
 635                 union active_open_entry *p = t->afree;
 636
 637                 atid = (p - t->atid_tab) + t->atid_base;
 638                 t->afree = p->next;
 639                 p->t3c_tid.ctx = ctx;
 640                 p->t3c_tid.client = client;
 641                 t->atids_in_use++;
 642         }
 643         spin_unlock_bh(&t->atid_lock);
 644         return atid;
 645 }
 646
 647 EXPORT_SYMBOL(cxgb3_alloc_atid);
 648
 649 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
 650                      void *ctx)
 651 {
 652         int stid = -1;
 653         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 654
 655         spin_lock_bh(&t->stid_lock);
 656         if (t->sfree) {
 657                 union listen_entry *p = t->sfree;
 658
 659                 stid = (p - t->stid_tab) + t->stid_base;
 660                 t->sfree = p->next;
 661                 p->t3c_tid.ctx = ctx;
 662                 p->t3c_tid.client = client;
 663                 t->stids_in_use++;
 664         }
 665         spin_unlock_bh(&t->stid_lock);
 666         return stid;
 667 }
 668
 669 EXPORT_SYMBOL(cxgb3_alloc_stid);
 670
 671 /* Get the t3cdev associated with a net_device */
 672 struct t3cdev *dev2t3cdev(struct net_device *dev)
 673 {
 674         const struct port_info *pi = netdev_priv(dev);
 675
 676         return (struct t3cdev *)pi->adapter;
 677 }
 678
 679 EXPORT_SYMBOL(dev2t3cdev);
 680
 681 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 682 {
 683         struct cpl_smt_write_rpl *rpl = cplhdr(skb);
 684
 685         if (rpl->status != CPL_ERR_NONE)
 686                 printk(KERN_ERR
 687                        "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
 688                        rpl->status, GET_TID(rpl));
 689
 690         return CPL_RET_BUF_DONE;
 691 }
 692
 693 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 694 {
 695         struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
 696
 697         if (rpl->status != CPL_ERR_NONE)
 698                 printk(KERN_ERR
 699                        "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
 700                        rpl->status, GET_TID(rpl));
 701
 702         return CPL_RET_BUF_DONE;
 703 }
 704
 705 static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 706 {
 707         struct cpl_rte_write_rpl *rpl = cplhdr(skb);
 708
 709         if (rpl->status != CPL_ERR_NONE)
 710                 printk(KERN_ERR
 711                        "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
 712                        rpl->status, GET_TID(rpl));
 713
 714         return CPL_RET_BUF_DONE;
 715 }
 716
 717 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
 718 {
 719         struct cpl_act_open_rpl *rpl = cplhdr(skb);
 720         unsigned int atid = G_TID(ntohl(rpl->atid));
 721         struct t3c_tid_entry *t3c_tid;
 722
 723         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
 724         if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
 725             t3c_tid->client->handlers &&
 726             t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
 727                 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
 728                                                                     t3c_tid->
 729                                                                     ctx);
 730         } else {
 731                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 732                        dev->name, CPL_ACT_OPEN_RPL);
 733                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 734         }
 735 }
 736
 737 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 738 {
 739         union opcode_tid *p = cplhdr(skb);
 740         unsigned int stid = G_TID(ntohl(p->opcode_tid));
 741         struct t3c_tid_entry *t3c_tid;
 742
 743         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
 744         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 745             t3c_tid->client->handlers[p->opcode]) {
 746                 return t3c_tid->client->handlers[p->opcode] (dev, skb,
 747                                                              t3c_tid->ctx);
 748         } else {
 749                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 750                        dev->name, p->opcode);
 751                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 752         }
 753 }
 754
 755 static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 756 {
 757         union opcode_tid *p = cplhdr(skb);
 758         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 759         struct t3c_tid_entry *t3c_tid;
 760
 761         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 762         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 763             t3c_tid->client->handlers[p->opcode]) {
 764                 return t3c_tid->client->handlers[p->opcode]
 765                     (dev, skb, t3c_tid->ctx);
 766         } else {
 767                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 768                        dev->name, p->opcode);
 769                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 770         }
 771 }
 772
 773 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
 774 {
 775         struct cpl_pass_accept_req *req = cplhdr(skb);
 776         unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 777         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 778         struct t3c_tid_entry *t3c_tid;
 779         unsigned int tid = GET_TID(req);
 780
 781         if (unlikely(tid >= t->ntids)) {
 782                 printk("%s: passive open TID %u too large\n",
 783                        dev->name, tid);
 784                 t3_fatal_err(tdev2adap(dev));
 785                 return CPL_RET_BUF_DONE;
 786         }
 787
 788         t3c_tid = lookup_stid(t, stid);
 789         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 790             t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
 791                 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
 792                     (dev, skb, t3c_tid->ctx);
 793         } else {
 794                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 795                        dev->name, CPL_PASS_ACCEPT_REQ);
 796                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 797         }
 798 }
 799
 800 /*
 801  * Returns an sk_buff for a reply CPL message of size len.  If the input
 802  * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
 803  * is allocated.  The input skb must be of size at least len.  Note that this
 804  * operation does not destroy the original skb data even if it decides to reuse
 805  * the buffer.
 806  */
 807 static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
 808                                                gfp_t gfp)
 809 {
 810         if (likely(!skb_cloned(skb))) {
 811                 BUG_ON(skb->len < len);
 812                 __skb_trim(skb, len);
 813                 skb_get(skb);
 814         } else {
 815                 skb = alloc_skb(len, gfp);
 816                 if (skb)
 817                         __skb_put(skb, len);
 818         }
 819         return skb;
 820 }
 821
 822 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
 823 {
 824         union opcode_tid *p = cplhdr(skb);
 825         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 826         struct t3c_tid_entry *t3c_tid;
 827
 828         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 829         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 830             t3c_tid->client->handlers[p->opcode]) {
 831                 return t3c_tid->client->handlers[p->opcode]
 832                     (dev, skb, t3c_tid->ctx);
 833         } else {
 834                 struct cpl_abort_req_rss *req = cplhdr(skb);
 835                 struct cpl_abort_rpl *rpl;
 836                 struct sk_buff *reply_skb;
 837                 unsigned int tid = GET_TID(req);
 838                 u8 cmd = req->status;
 839
 840                 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
 841                     req->status == CPL_ERR_PERSIST_NEG_ADVICE)
 842                         goto out;
 843
 844                 reply_skb = cxgb3_get_cpl_reply_skb(skb,
 845                                                     sizeof(struct
 846                                                            cpl_abort_rpl),
 847                                                     GFP_ATOMIC);
 848
 849                 if (!reply_skb) {
 850                         printk("do_abort_req_rss: couldn't get skb!\n");
 851                         goto out;
 852                 }
 853                 reply_skb->priority = CPL_PRIORITY_DATA;
 854                 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
 855                 rpl = cplhdr(reply_skb);
 856                 rpl->wr.wr_hi =
 857                     htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
 858                 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
 859                 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
 860                 rpl->cmd = cmd;
 861                 cxgb3_ofld_send(dev, reply_skb);
 862 out:
 863                 return CPL_RET_BUF_DONE;
 864         }
 865 }
 866
 867 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
 868 {
 869         struct cpl_act_establish *req = cplhdr(skb);
 870         unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 871         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 872         struct t3c_tid_entry *t3c_tid;
 873         unsigned int tid = GET_TID(req);
 874
 875         if (unlikely(tid >= t->ntids)) {
 876                 printk("%s: active establish TID %u too large\n",
 877                        dev->name, tid);
 878                 t3_fatal_err(tdev2adap(dev));
 879                 return CPL_RET_BUF_DONE;
 880         }
 881
 882         t3c_tid = lookup_atid(t, atid);
 883         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 884             t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
 885                 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
 886                     (dev, skb, t3c_tid->ctx);
 887         } else {
 888                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 889                        dev->name, CPL_ACT_ESTABLISH);
 890                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 891         }
 892 }
 893
 894 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
 895 {
 896         struct cpl_trace_pkt *p = cplhdr(skb);
 897
 898         skb->protocol = htons(0xffff);
 899         skb->dev = dev->lldev;
 900         skb_pull(skb, sizeof(*p));
 901         skb_reset_mac_header(skb);
 902         netif_receive_skb(skb);
 903         return 0;
 904 }
 905
 906 /*
 907  * That skb would better have come from process_responses() where we abuse
 908  * ->priority and ->csum to carry our data.  NB: if we get to per-arch
 909  * ->csum, the things might get really interesting here.
 910  */
 911
 912 static inline u32 get_hwtid(struct sk_buff *skb)
 913 {
 914         return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
 915 }
 916
 917 static inline u32 get_opcode(struct sk_buff *skb)
 918 {
 919         return G_OPCODE(ntohl((__force __be32)skb->csum));
 920 }
 921
 922 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
 923 {
 924         unsigned int hwtid = get_hwtid(skb);
 925         unsigned int opcode = get_opcode(skb);
 926         struct t3c_tid_entry *t3c_tid;
 927
 928         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 929         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 930             t3c_tid->client->handlers[opcode]) {
 931                 return t3c_tid->client->handlers[opcode] (dev, skb,
 932                                                           t3c_tid->ctx);
 933         } else {
 934                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 935                        dev->name, opcode);
 936                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 937         }
 938 }
 939
 940 static int nb_callback(struct notifier_block *self, unsigned long event,
 941                        void *ctx)
 942 {
 943         switch (event) {
 944         case (NETEVENT_NEIGH_UPDATE):{
 945                 cxgb_neigh_update((struct neighbour *)ctx);
 946                 break;
 947         }
 948         case (NETEVENT_PMTU_UPDATE):
 949                 break;
 950         case (NETEVENT_REDIRECT):{
 951                 struct netevent_redirect *nr = ctx;
 952                 cxgb_redirect(nr->old, nr->new);
 953                 cxgb_neigh_update(nr->new->neighbour);
 954                 break;
 955         }
 956         default:
 957                 break;
 958         }
 959         return 0;
 960 }
 961
 962 static struct notifier_block nb = {
 963         .notifier_call = nb_callback
 964 };
 965
 966 /*
 967  * Process a received packet with an unknown/unexpected CPL opcode.
 968  */
 969 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
 970 {
 971         printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
 972                *skb->data);
 973         return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 974 }
 975
 976 /*
 977  * Handlers for each CPL opcode
 978  */
 979 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
 980
 981 /*
 982  * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
 983  * to unregister an existing handler.
 984  */
 985 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
 986 {
 987         if (opcode < NUM_CPL_CMDS)
 988                 cpl_handlers[opcode] = h ? h : do_bad_cpl;
 989         else
 990                 printk(KERN_ERR "T3C: handler registration for "
 991                        "opcode %x failed\n", opcode);
 992 }
 993
 994 EXPORT_SYMBOL(t3_register_cpl_handler);
 995
 996 /*
 997  * T3CDEV's receive method.
 998  */
 999 int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
1000 {
1001         while (n--) {
1002                 struct sk_buff *skb = *skbs++;
1003                 unsigned int opcode = get_opcode(skb);
1004                 int ret = cpl_handlers[opcode] (dev, skb);
1005
1006 #if VALIDATE_TID
1007                 if (ret & CPL_RET_UNKNOWN_TID) {
1008                         union opcode_tid *p = cplhdr(skb);
1009
1010                         printk(KERN_ERR "%s: CPL message (opcode %u) had "
1011                                "unknown TID %u\n", dev->name, opcode,
1012                                G_TID(ntohl(p->opcode_tid)));
1013                 }
1014 #endif
1015                 if (ret & CPL_RET_BUF_DONE)
1016                         kfree_skb(skb);
1017         }
1018         return 0;
1019 }
1020
1021 /*
1022  * Sends an sk_buff to a T3C driver after dealing with any active network taps.
1023  */
1024 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
1025 {
1026         int r;
1027
1028         local_bh_disable();
1029         r = dev->send(dev, skb);
1030         local_bh_enable();
1031         return r;
1032 }
1033
1034 EXPORT_SYMBOL(cxgb3_ofld_send);
1035
1036 static int is_offloading(struct net_device *dev)
1037 {
1038         struct adapter *adapter;
1039         int i;
1040
1041         read_lock_bh(&adapter_list_lock);
1042         list_for_each_entry(adapter, &adapter_list, adapter_list) {
1043                 for_each_port(adapter, i) {
1044                         if (dev == adapter->port[i]) {
1045                                 read_unlock_bh(&adapter_list_lock);
1046                                 return 1;
1047                         }
1048                 }
1049         }
1050         read_unlock_bh(&adapter_list_lock);
1051         return 0;
1052 }
1053
1054 void cxgb_neigh_update(struct neighbour *neigh)
1055 {
1056         struct net_device *dev = neigh->dev;
1057
1058         if (dev && (is_offloading(dev))) {
1059                 struct t3cdev *tdev = dev2t3cdev(dev);
1060
1061                 BUG_ON(!tdev);
1062                 t3_l2t_update(tdev, neigh);
1063         }
1064 }
1065
1066 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
1067 {
1068         struct sk_buff *skb;
1069         struct cpl_set_tcb_field *req;
1070
1071         skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
1072         if (!skb) {
1073                 printk(KERN_ERR "%s: cannot allocate skb!\n", __func__);
1074                 return;
1075         }
1076         skb->priority = CPL_PRIORITY_CONTROL;
1077         req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
1078         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1079         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1080         req->reply = 0;
1081         req->cpu_idx = 0;
1082         req->word = htons(W_TCB_L2T_IX);
1083         req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
1084         req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
1085         tdev->send(tdev, skb);
1086 }
1087
1088 void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
1089 {
1090         struct net_device *olddev, *newdev;
1091         struct tid_info *ti;
1092         struct t3cdev *tdev;
1093         u32 tid;
1094         int update_tcb;
1095         struct l2t_entry *e;
1096         struct t3c_tid_entry *te;
1097
1098         olddev = old->neighbour->dev;
1099         newdev = new->neighbour->dev;
1100         if (!is_offloading(olddev))
1101                 return;
1102         if (!is_offloading(newdev)) {
1103                 printk(KERN_WARNING "%s: Redirect to non-offload "
1104                        "device ignored.\n", __func__);
1105                 return;
1106         }
1107         tdev = dev2t3cdev(olddev);
1108         BUG_ON(!tdev);
1109         if (tdev != dev2t3cdev(newdev)) {
1110                 printk(KERN_WARNING "%s: Redirect to different "
1111                        "offload device ignored.\n", __func__);
1112                 return;
1113         }
1114
1115         /* Add new L2T entry */
1116         e = t3_l2t_get(tdev, new->neighbour, newdev);
1117         if (!e) {
1118                 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
1119                        __func__);
1120                 return;
1121         }
1122
1123         /* Walk tid table and notify clients of dst change. */
1124         ti = &(T3C_DATA(tdev))->tid_maps;
1125         for (tid = 0; tid < ti->ntids; tid++) {
1126                 te = lookup_tid(ti, tid);
1127                 BUG_ON(!te);
1128                 if (te && te->ctx && te->client && te->client->redirect) {
1129                         update_tcb = te->client->redirect(te->ctx, old, new, e);
1130                         if (update_tcb) {
1131                                 l2t_hold(L2DATA(tdev), e);
1132                                 set_l2t_ix(tdev, tid, e);
1133                         }
1134                 }
1135         }
1136         l2t_release(L2DATA(tdev), e);
1137 }
1138
1139 /*
1140  * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1141  * The allocated memory is cleared.
1142  */
1143 void *cxgb_alloc_mem(unsigned long size)
1144 {
1145         void *p = kmalloc(size, GFP_KERNEL);
1146
1147         if (!p)
1148                 p = vmalloc(size);
1149         if (p)
1150                 memset(p, 0, size);
1151         return p;
1152 }
1153
1154 /*
1155  * Free memory allocated through t3_alloc_mem().
1156  */
1157 void cxgb_free_mem(void *addr)
1158 {
1159         if (is_vmalloc_addr(addr))
1160                 vfree(addr);
1161         else
1162                 kfree(addr);
1163 }
1164
1165 /*
1166  * Allocate and initialize the TID tables.  Returns 0 on success.
1167  */
1168 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1169                          unsigned int natids, unsigned int nstids,
1170                          unsigned int atid_base, unsigned int stid_base)
1171 {
1172         unsigned long size = ntids * sizeof(*t->tid_tab) +
1173             natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1174
1175         t->tid_tab = cxgb_alloc_mem(size);
1176         if (!t->tid_tab)
1177                 return -ENOMEM;
1178
1179         t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1180         t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1181         t->ntids = ntids;
1182         t->nstids = nstids;
1183         t->stid_base = stid_base;
1184         t->sfree = NULL;
1185         t->natids = natids;
1186         t->atid_base = atid_base;
1187         t->afree = NULL;
1188         t->stids_in_use = t->atids_in_use = 0;
1189         atomic_set(&t->tids_in_use, 0);
1190         spin_lock_init(&t->stid_lock);
1191         spin_lock_init(&t->atid_lock);
1192
1193         /*
1194          * Setup the free lists for stid_tab and atid_tab.
1195          */
1196         if (nstids) {
1197                 while (--nstids)
1198                         t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1199                 t->sfree = t->stid_tab;
1200         }
1201         if (natids) {
1202                 while (--natids)
1203                         t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1204                 t->afree = t->atid_tab;
1205         }
1206         return 0;
1207 }
1208
1209 static void free_tid_maps(struct tid_info *t)
1210 {
1211         cxgb_free_mem(t->tid_tab);
1212 }
1213
1214 static inline void add_adapter(struct adapter *adap)
1215 {
1216         write_lock_bh(&adapter_list_lock);
1217         list_add_tail(&adap->adapter_list, &adapter_list);
1218         write_unlock_bh(&adapter_list_lock);
1219 }
1220
1221 static inline void remove_adapter(struct adapter *adap)
1222 {
1223         write_lock_bh(&adapter_list_lock);
1224         list_del(&adap->adapter_list);
1225         write_unlock_bh(&adapter_list_lock);
1226 }
1227
1228 int cxgb3_offload_activate(struct adapter *adapter)
1229 {
1230         struct t3cdev *dev = &adapter->tdev;
1231         int natids, err;
1232         struct t3c_data *t;
1233         struct tid_range stid_range, tid_range;
1234         struct mtutab mtutab;
1235         unsigned int l2t_capacity;
1236
1237         t = kcalloc(1, sizeof(*t), GFP_KERNEL);
1238         if (!t)
1239                 return -ENOMEM;
1240
1241         err = -EOPNOTSUPP;
1242         if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1243             dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1244             dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1245             dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1246             dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1247             dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1248                 goto out_free;
1249
1250         err = -ENOMEM;
1251         L2DATA(dev) = t3_init_l2t(l2t_capacity);
1252         if (!L2DATA(dev))
1253                 goto out_free;
1254
1255         natids = min(tid_range.num / 2, MAX_ATIDS);
1256         err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1257                             stid_range.num, ATID_BASE, stid_range.base);
1258         if (err)
1259                 goto out_free_l2t;
1260
1261         t->mtus = mtutab.mtus;
1262         t->nmtus = mtutab.size;
1263
1264         INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1265         spin_lock_init(&t->tid_release_lock);
1266         INIT_LIST_HEAD(&t->list_node);
1267         t->dev = dev;
1268
1269         T3C_DATA(dev) = t;
1270         dev->recv = process_rx;
1271         dev->neigh_update = t3_l2t_update;
1272
1273         /* Register netevent handler once */
1274         if (list_empty(&adapter_list))
1275                 register_netevent_notifier(&nb);
1276
1277         add_adapter(adapter);
1278         return 0;
1279
1280 out_free_l2t:
1281         t3_free_l2t(L2DATA(dev));
1282         L2DATA(dev) = NULL;
1283 out_free:
1284         kfree(t);
1285         return err;
1286 }
1287
1288 void cxgb3_offload_deactivate(struct adapter *adapter)
1289 {
1290         struct t3cdev *tdev = &adapter->tdev;
1291         struct t3c_data *t = T3C_DATA(tdev);
1292
1293         remove_adapter(adapter);
1294         if (list_empty(&adapter_list))
1295                 unregister_netevent_notifier(&nb);
1296
1297         free_tid_maps(&t->tid_maps);
1298         T3C_DATA(tdev) = NULL;
1299         t3_free_l2t(L2DATA(tdev));
1300         L2DATA(tdev) = NULL;
1301         kfree(t);
1302 }
1303
1304 static inline void register_tdev(struct t3cdev *tdev)
1305 {
1306         static int unit;
1307
1308         mutex_lock(&cxgb3_db_lock);
1309         snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1310         list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1311         mutex_unlock(&cxgb3_db_lock);
1312 }
1313
1314 static inline void unregister_tdev(struct t3cdev *tdev)
1315 {
1316         mutex_lock(&cxgb3_db_lock);
1317         list_del(&tdev->ofld_dev_list);
1318         mutex_unlock(&cxgb3_db_lock);
1319 }
1320
1321 static inline int adap2type(struct adapter *adapter)
1322 {
1323         int type = 0;
1324
1325         switch (adapter->params.rev) {
1326         case T3_REV_A:
1327                 type = T3A;
1328                 break;
1329         case T3_REV_B:
1330         case T3_REV_B2:
1331                 type = T3B;
1332                 break;
1333         case T3_REV_C:
1334                 type = T3C;
1335                 break;
1336         }
1337         return type;
1338 }
1339
1340 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1341 {
1342         struct t3cdev *tdev = &adapter->tdev;
1343
1344         INIT_LIST_HEAD(&tdev->ofld_dev_list);
1345
1346         cxgb3_set_dummy_ops(tdev);
1347         tdev->send = t3_offload_tx;
1348         tdev->ctl = cxgb_offload_ctl;
1349         tdev->type = adap2type(adapter);
1350
1351         register_tdev(tdev);
1352 }
1353
1354 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1355 {
1356         struct t3cdev *tdev = &adapter->tdev;
1357
1358         tdev->recv = NULL;
1359         tdev->neigh_update = NULL;
1360
1361         unregister_tdev(tdev);
1362 }
1363
1364 void __init cxgb3_offload_init(void)
1365 {
1366         int i;
1367
1368         for (i = 0; i < NUM_CPL_CMDS; ++i)
1369                 cpl_handlers[i] = do_bad_cpl;
1370
1371         t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1372         t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1373         t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
1374         t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1375         t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1376         t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1377         t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1378         t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1379         t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1380         t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1381         t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1382         t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1383         t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1384         t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1385         t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1386         t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1387         t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1388         t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1389         t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1390         t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1391         t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1392         t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1393         t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1394         t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1395         t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1396         t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1397 }