SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 <linux/slab.h>
  35 #include <net/neighbour.h>
  36 #include <linux/notifier.h>
  37 #include <asm/atomic.h>
  38 #include <linux/proc_fs.h>
  39 #include <linux/if_vlan.h>
  40 #include <net/netevent.h>
  41 #include <linux/highmem.h>
  42 #include <linux/vmalloc.h>
  43
  44 #include "common.h"
  45 #include "regs.h"
  46 #include "cxgb3_ioctl.h"
  47 #include "cxgb3_ctl_defs.h"
  48 #include "cxgb3_defs.h"
  49 #include "l2t.h"
  50 #include "firmware_exports.h"
  51 #include "cxgb3_offload.h"
  52
  53 static LIST_HEAD(client_list);
  54 static LIST_HEAD(ofld_dev_list);
  55 static DEFINE_MUTEX(cxgb3_db_lock);
  56
  57 static DEFINE_RWLOCK(adapter_list_lock);
  58 static LIST_HEAD(adapter_list);
  59
  60 static const unsigned int MAX_ATIDS = 64 * 1024;
  61 static const unsigned int ATID_BASE = 0x10000;
  62
  63 static inline int offload_activated(struct t3cdev *tdev)
  64 {
  65         const struct adapter *adapter = tdev2adap(tdev);
  66
  67         return (test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map));
  68 }
  69
  70 /**
  71  *      cxgb3_register_client - register an offload client
  72  *      @client: the client
  73  *
  74  *      Add the client to the client list,
  75  *      and call backs the client for each activated offload device
  76  */
  77 void cxgb3_register_client(struct cxgb3_client *client)
  78 {
  79         struct t3cdev *tdev;
  80
  81         mutex_lock(&cxgb3_db_lock);
  82         list_add_tail(&client->client_list, &client_list);
  83
  84         if (client->add) {
  85                 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
  86                         if (offload_activated(tdev))
  87                                 client->add(tdev);
  88                 }
  89         }
  90         mutex_unlock(&cxgb3_db_lock);
  91 }
  92
  93 EXPORT_SYMBOL(cxgb3_register_client);
  94
  95 /**
  96  *      cxgb3_unregister_client - unregister an offload client
  97  *      @client: the client
  98  *
  99  *      Remove the client to the client list,
 100  *      and call backs the client for each activated offload device.
 101  */
 102 void cxgb3_unregister_client(struct cxgb3_client *client)
 103 {
 104         struct t3cdev *tdev;
 105
 106         mutex_lock(&cxgb3_db_lock);
 107         list_del(&client->client_list);
 108
 109         if (client->remove) {
 110                 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
 111                         if (offload_activated(tdev))
 112                                 client->remove(tdev);
 113                 }
 114         }
 115         mutex_unlock(&cxgb3_db_lock);
 116 }
 117
 118 EXPORT_SYMBOL(cxgb3_unregister_client);
 119
 120 /**
 121  *      cxgb3_add_clients - activate registered clients for an offload device
 122  *      @tdev: the offload device
 123  *
 124  *      Call backs all registered clients once a offload device is activated
 125  */
 126 void cxgb3_add_clients(struct t3cdev *tdev)
 127 {
 128         struct cxgb3_client *client;
 129
 130         mutex_lock(&cxgb3_db_lock);
 131         list_for_each_entry(client, &client_list, client_list) {
 132                 if (client->add)
 133                         client->add(tdev);
 134         }
 135         mutex_unlock(&cxgb3_db_lock);
 136 }
 137
 138 /**
 139  *      cxgb3_remove_clients - deactivates registered clients
 140  *                             for an offload device
 141  *      @tdev: the offload device
 142  *
 143  *      Call backs all registered clients once a offload device is deactivated
 144  */
 145 void cxgb3_remove_clients(struct t3cdev *tdev)
 146 {
 147         struct cxgb3_client *client;
 148
 149         mutex_lock(&cxgb3_db_lock);
 150         list_for_each_entry(client, &client_list, client_list) {
 151                 if (client->remove)
 152                         client->remove(tdev);
 153         }
 154         mutex_unlock(&cxgb3_db_lock);
 155 }
 156
 157 void cxgb3_event_notify(struct t3cdev *tdev, u32 event, u32 port)
 158 {
 159         struct cxgb3_client *client;
 160
 161         mutex_lock(&cxgb3_db_lock);
 162         list_for_each_entry(client, &client_list, client_list) {
 163                 if (client->event_handler)
 164                         client->event_handler(tdev, event, port);
 165         }
 166         mutex_unlock(&cxgb3_db_lock);
 167 }
 168
 169 static struct net_device *get_iff_from_mac(struct adapter *adapter,
 170                                            const unsigned char *mac,
 171                                            unsigned int vlan)
 172 {
 173         int i;
 174
 175         for_each_port(adapter, i) {
 176                 struct vlan_group *grp;
 177                 struct net_device *dev = adapter->port[i];
 178                 const struct port_info *p = netdev_priv(dev);
 179
 180                 if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) {
 181                         if (vlan && vlan != VLAN_VID_MASK) {
 182                                 grp = p->vlan_grp;
 183                                 dev = NULL;
 184                                 if (grp)
 185                                         dev = vlan_group_get_device(grp, vlan);
 186                         } else
 187                                 while (dev->master)
 188                                         dev = dev->master;
 189                         return dev;
 190                 }
 191         }
 192         return NULL;
 193 }
 194
 195 static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
 196                               void *data)
 197 {
 198         int i;
 199         int ret = 0;
 200         unsigned int val = 0;
 201         struct ulp_iscsi_info *uiip = data;
 202
 203         switch (req) {
 204         case ULP_ISCSI_GET_PARAMS:
 205                 uiip->pdev = adapter->pdev;
 206                 uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
 207                 uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
 208                 uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
 209
 210                 val = t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ);
 211                 for (i = 0; i < 4; i++, val >>= 8)
 212                         uiip->pgsz_factor[i] = val & 0xFF;
 213
 214                 val = t3_read_reg(adapter, A_TP_PARA_REG7);
 215                 uiip->max_txsz =
 216                 uiip->max_rxsz = min((val >> S_PMMAXXFERLEN0)&M_PMMAXXFERLEN0,
 217                                      (val >> S_PMMAXXFERLEN1)&M_PMMAXXFERLEN1);
 218                 /*
 219                  * On tx, the iscsi pdu has to be <= tx page size and has to
 220                  * fit into the Tx PM FIFO.
 221                  */
 222                 val = min(adapter->params.tp.tx_pg_size,
 223                           t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
 224                 uiip->max_txsz = min(val, uiip->max_txsz);
 225
 226                 /* set MaxRxData to 16224 */
 227                 val = t3_read_reg(adapter, A_TP_PARA_REG2);
 228                 if ((val >> S_MAXRXDATA) != 0x3f60) {
 229                         val &= (M_RXCOALESCESIZE << S_RXCOALESCESIZE);
 230                         val |= V_MAXRXDATA(0x3f60);
 231                         printk(KERN_INFO
 232                                 "%s, iscsi set MaxRxData to 16224 (0x%x).\n",
 233                                 adapter->name, val);
 234                         t3_write_reg(adapter, A_TP_PARA_REG2, val);
 235                 }
 236
 237                 /*
 238                  * on rx, the iscsi pdu has to be < rx page size and the
 239                  * the max rx data length programmed in TP
 240                  */
 241                 val = min(adapter->params.tp.rx_pg_size,
 242                           ((t3_read_reg(adapter, A_TP_PARA_REG2)) >>
 243                                 S_MAXRXDATA) & M_MAXRXDATA);
 244                 uiip->max_rxsz = min(val, uiip->max_rxsz);
 245                 break;
 246         case ULP_ISCSI_SET_PARAMS:
 247                 t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
 248                 /* program the ddp page sizes */
 249                 for (i = 0; i < 4; i++)
 250                         val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
 251                 if (val && (val != t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ))) {
 252                         printk(KERN_INFO
 253                                 "%s, setting iscsi pgsz 0x%x, %u,%u,%u,%u.\n",
 254                                 adapter->name, val, uiip->pgsz_factor[0],
 255                                 uiip->pgsz_factor[1], uiip->pgsz_factor[2],
 256                                 uiip->pgsz_factor[3]);
 257                         t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
 258                 }
 259                 break;
 260         default:
 261                 ret = -EOPNOTSUPP;
 262         }
 263         return ret;
 264 }
 265
 266 /* Response queue used for RDMA events. */
 267 #define ASYNC_NOTIF_RSPQ 0
 268
 269 static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
 270 {
 271         int ret = 0;
 272
 273         switch (req) {
 274         case RDMA_GET_PARAMS: {
 275                 struct rdma_info *rdma = data;
 276                 struct pci_dev *pdev = adapter->pdev;
 277
 278                 rdma->udbell_physbase = pci_resource_start(pdev, 2);
 279                 rdma->udbell_len = pci_resource_len(pdev, 2);
 280                 rdma->tpt_base =
 281                         t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
 282                 rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
 283                 rdma->pbl_base =
 284                         t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
 285                 rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
 286                 rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
 287                 rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
 288                 rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
 289                 rdma->pdev = pdev;
 290                 break;
 291         }
 292         case RDMA_CQ_OP:{
 293                 unsigned long flags;
 294                 struct rdma_cq_op *rdma = data;
 295
 296                 /* may be called in any context */
 297                 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
 298                 ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
 299                                         rdma->credits);
 300                 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
 301                 break;
 302         }
 303         case RDMA_GET_MEM:{
 304                 struct ch_mem_range *t = data;
 305                 struct mc7 *mem;
 306
 307                 if ((t->addr & 7) || (t->len & 7))
 308                         return -EINVAL;
 309                 if (t->mem_id == MEM_CM)
 310                         mem = &adapter->cm;
 311                 else if (t->mem_id == MEM_PMRX)
 312                         mem = &adapter->pmrx;
 313                 else if (t->mem_id == MEM_PMTX)
 314                         mem = &adapter->pmtx;
 315                 else
 316                         return -EINVAL;
 317
 318                 ret =
 319                         t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
 320                                         (u64 *) t->buf);
 321                 if (ret)
 322                         return ret;
 323                 break;
 324         }
 325         case RDMA_CQ_SETUP:{
 326                 struct rdma_cq_setup *rdma = data;
 327
 328                 spin_lock_irq(&adapter->sge.reg_lock);
 329                 ret =
 330                         t3_sge_init_cqcntxt(adapter, rdma->id,
 331                                         rdma->base_addr, rdma->size,
 332                                         ASYNC_NOTIF_RSPQ,
 333                                         rdma->ovfl_mode, rdma->credits,
 334                                         rdma->credit_thres);
 335                 spin_unlock_irq(&adapter->sge.reg_lock);
 336                 break;
 337         }
 338         case RDMA_CQ_DISABLE:
 339                 spin_lock_irq(&adapter->sge.reg_lock);
 340                 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
 341                 spin_unlock_irq(&adapter->sge.reg_lock);
 342                 break;
 343         case RDMA_CTRL_QP_SETUP:{
 344                 struct rdma_ctrlqp_setup *rdma = data;
 345
 346                 spin_lock_irq(&adapter->sge.reg_lock);
 347                 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
 348                                                 SGE_CNTXT_RDMA,
 349                                                 ASYNC_NOTIF_RSPQ,
 350                                                 rdma->base_addr, rdma->size,
 351                                                 FW_RI_TID_START, 1, 0);
 352                 spin_unlock_irq(&adapter->sge.reg_lock);
 353                 break;
 354         }
 355         case RDMA_GET_MIB: {
 356                 spin_lock(&adapter->stats_lock);
 357                 t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
 358                 spin_unlock(&adapter->stats_lock);
 359                 break;
 360         }
 361         default:
 362                 ret = -EOPNOTSUPP;
 363         }
 364         return ret;
 365 }
 366
 367 static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
 368 {
 369         struct adapter *adapter = tdev2adap(tdev);
 370         struct tid_range *tid;
 371         struct mtutab *mtup;
 372         struct iff_mac *iffmacp;
 373         struct ddp_params *ddpp;
 374         struct adap_ports *ports;
 375         struct ofld_page_info *rx_page_info;
 376         struct tp_params *tp = &adapter->params.tp;
 377         int i;
 378
 379         switch (req) {
 380         case GET_MAX_OUTSTANDING_WR:
 381                 *(unsigned int *)data = FW_WR_NUM;
 382                 break;
 383         case GET_WR_LEN:
 384                 *(unsigned int *)data = WR_FLITS;
 385                 break;
 386         case GET_TX_MAX_CHUNK:
 387                 *(unsigned int *)data = 1 << 20;        /* 1MB */
 388                 break;
 389         case GET_TID_RANGE:
 390                 tid = data;
 391                 tid->num = t3_mc5_size(&adapter->mc5) -
 392                     adapter->params.mc5.nroutes -
 393                     adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
 394                 tid->base = 0;
 395                 break;
 396         case GET_STID_RANGE:
 397                 tid = data;
 398                 tid->num = adapter->params.mc5.nservers;
 399                 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
 400                     adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
 401                 break;
 402         case GET_L2T_CAPACITY:
 403                 *(unsigned int *)data = 2048;
 404                 break;
 405         case GET_MTUS:
 406                 mtup = data;
 407                 mtup->size = NMTUS;
 408                 mtup->mtus = adapter->params.mtus;
 409                 break;
 410         case GET_IFF_FROM_MAC:
 411                 iffmacp = data;
 412                 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
 413                                                 iffmacp->vlan_tag &
 414                                                 VLAN_VID_MASK);
 415                 break;
 416         case GET_DDP_PARAMS:
 417                 ddpp = data;
 418                 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
 419                 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
 420                 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
 421                 break;
 422         case GET_PORTS:
 423                 ports = data;
 424                 ports->nports = adapter->params.nports;
 425                 for_each_port(adapter, i)
 426                         ports->lldevs[i] = adapter->port[i];
 427                 break;
 428         case ULP_ISCSI_GET_PARAMS:
 429         case ULP_ISCSI_SET_PARAMS:
 430                 if (!offload_running(adapter))
 431                         return -EAGAIN;
 432                 return cxgb_ulp_iscsi_ctl(adapter, req, data);
 433         case RDMA_GET_PARAMS:
 434         case RDMA_CQ_OP:
 435         case RDMA_CQ_SETUP:
 436         case RDMA_CQ_DISABLE:
 437         case RDMA_CTRL_QP_SETUP:
 438         case RDMA_GET_MEM:
 439         case RDMA_GET_MIB:
 440                 if (!offload_running(adapter))
 441                         return -EAGAIN;
 442                 return cxgb_rdma_ctl(adapter, req, data);
 443         case GET_RX_PAGE_INFO:
 444                 rx_page_info = data;
 445                 rx_page_info->page_size = tp->rx_pg_size;
 446                 rx_page_info->num = tp->rx_num_pgs;
 447                 break;
 448         case GET_ISCSI_IPV4ADDR: {
 449                 struct iscsi_ipv4addr *p = data;
 450                 struct port_info *pi = netdev_priv(p->dev);
 451                 p->ipv4addr = pi->iscsi_ipv4addr;
 452                 break;
 453         }
 454         case GET_EMBEDDED_INFO: {
 455                 struct ch_embedded_info *e = data;
 456
 457                 spin_lock(&adapter->stats_lock);
 458                 t3_get_fw_version(adapter, &e->fw_vers);
 459                 t3_get_tp_version(adapter, &e->tp_vers);
 460                 spin_unlock(&adapter->stats_lock);
 461                 break;
 462         }
 463         default:
 464                 return -EOPNOTSUPP;
 465         }
 466         return 0;
 467 }
 468
 469 /*
 470  * Dummy handler for Rx offload packets in case we get an offload packet before
 471  * proper processing is setup.  This complains and drops the packet as it isn't
 472  * normal to get offload packets at this stage.
 473  */
 474 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
 475                                 int n)
 476 {
 477         while (n--)
 478                 dev_kfree_skb_any(skbs[n]);
 479         return 0;
 480 }
 481
 482 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
 483 {
 484 }
 485
 486 void cxgb3_set_dummy_ops(struct t3cdev *dev)
 487 {
 488         dev->recv = rx_offload_blackhole;
 489         dev->neigh_update = dummy_neigh_update;
 490 }
 491
 492 /*
 493  * Free an active-open TID.
 494  */
 495 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
 496 {
 497         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 498         union active_open_entry *p = atid2entry(t, atid);
 499         void *ctx = p->t3c_tid.ctx;
 500
 501         spin_lock_bh(&t->atid_lock);
 502         p->next = t->afree;
 503         t->afree = p;
 504         t->atids_in_use--;
 505         spin_unlock_bh(&t->atid_lock);
 506
 507         return ctx;
 508 }
 509
 510 EXPORT_SYMBOL(cxgb3_free_atid);
 511
 512 /*
 513  * Free a server TID and return it to the free pool.
 514  */
 515 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
 516 {
 517         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 518         union listen_entry *p = stid2entry(t, stid);
 519
 520         spin_lock_bh(&t->stid_lock);
 521         p->next = t->sfree;
 522         t->sfree = p;
 523         t->stids_in_use--;
 524         spin_unlock_bh(&t->stid_lock);
 525 }
 526
 527 EXPORT_SYMBOL(cxgb3_free_stid);
 528
 529 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
 530                       void *ctx, unsigned int tid)
 531 {
 532         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 533
 534         t->tid_tab[tid].client = client;
 535         t->tid_tab[tid].ctx = ctx;
 536         atomic_inc(&t->tids_in_use);
 537 }
 538
 539 EXPORT_SYMBOL(cxgb3_insert_tid);
 540
 541 /*
 542  * Populate a TID_RELEASE WR.  The skb must be already propely sized.
 543  */
 544 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
 545 {
 546         struct cpl_tid_release *req;
 547
 548         skb->priority = CPL_PRIORITY_SETUP;
 549         req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
 550         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
 551         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
 552 }
 553
 554 static void t3_process_tid_release_list(struct work_struct *work)
 555 {
 556         struct t3c_data *td = container_of(work, struct t3c_data,
 557                                            tid_release_task);
 558         struct sk_buff *skb;
 559         struct t3cdev *tdev = td->dev;
 560
 561
 562         spin_lock_bh(&td->tid_release_lock);
 563         while (td->tid_release_list) {
 564                 struct t3c_tid_entry *p = td->tid_release_list;
 565
 566                 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
 567                 spin_unlock_bh(&td->tid_release_lock);
 568
 569                 skb = alloc_skb(sizeof(struct cpl_tid_release),
 570                                 GFP_KERNEL);
 571                 if (!skb)
 572                         skb = td->nofail_skb;
 573                 if (!skb) {
 574                         spin_lock_bh(&td->tid_release_lock);
 575                         p->ctx = (void *)td->tid_release_list;
 576                         td->tid_release_list = (struct t3c_tid_entry *)p;
 577                         break;
 578                 }
 579                 mk_tid_release(skb, p - td->tid_maps.tid_tab);
 580                 cxgb3_ofld_send(tdev, skb);
 581                 p->ctx = NULL;
 582                 if (skb == td->nofail_skb)
 583                         td->nofail_skb =
 584                                 alloc_skb(sizeof(struct cpl_tid_release),
 585                                         GFP_KERNEL);
 586                 spin_lock_bh(&td->tid_release_lock);
 587         }
 588         td->release_list_incomplete = (td->tid_release_list == NULL) ? 0 : 1;
 589         spin_unlock_bh(&td->tid_release_lock);
 590
 591         if (!td->nofail_skb)
 592                 td->nofail_skb =
 593                         alloc_skb(sizeof(struct cpl_tid_release),
 594                                 GFP_KERNEL);
 595 }
 596
 597 /* use ctx as a next pointer in the tid release list */
 598 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
 599 {
 600         struct t3c_data *td = T3C_DATA(tdev);
 601         struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
 602
 603         spin_lock_bh(&td->tid_release_lock);
 604         p->ctx = (void *)td->tid_release_list;
 605         p->client = NULL;
 606         td->tid_release_list = p;
 607         if (!p->ctx || td->release_list_incomplete)
 608                 schedule_work(&td->tid_release_task);
 609         spin_unlock_bh(&td->tid_release_lock);
 610 }
 611
 612 EXPORT_SYMBOL(cxgb3_queue_tid_release);
 613
 614 /*
 615  * Remove a tid from the TID table.  A client may defer processing its last
 616  * CPL message if it is locked at the time it arrives, and while the message
 617  * sits in the client's backlog the TID may be reused for another connection.
 618  * To handle this we atomically switch the TID association if it still points
 619  * to the original client context.
 620  */
 621 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
 622 {
 623         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 624
 625         BUG_ON(tid >= t->ntids);
 626         if (tdev->type == T3A)
 627                 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
 628         else {
 629                 struct sk_buff *skb;
 630
 631                 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
 632                 if (likely(skb)) {
 633                         mk_tid_release(skb, tid);
 634                         cxgb3_ofld_send(tdev, skb);
 635                         t->tid_tab[tid].ctx = NULL;
 636                 } else
 637                         cxgb3_queue_tid_release(tdev, tid);
 638         }
 639         atomic_dec(&t->tids_in_use);
 640 }
 641
 642 EXPORT_SYMBOL(cxgb3_remove_tid);
 643
 644 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
 645                      void *ctx)
 646 {
 647         int atid = -1;
 648         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 649
 650         spin_lock_bh(&t->atid_lock);
 651         if (t->afree &&
 652             t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
 653             t->ntids) {
 654                 union active_open_entry *p = t->afree;
 655
 656                 atid = (p - t->atid_tab) + t->atid_base;
 657                 t->afree = p->next;
 658                 p->t3c_tid.ctx = ctx;
 659                 p->t3c_tid.client = client;
 660                 t->atids_in_use++;
 661         }
 662         spin_unlock_bh(&t->atid_lock);
 663         return atid;
 664 }
 665
 666 EXPORT_SYMBOL(cxgb3_alloc_atid);
 667
 668 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
 669                      void *ctx)
 670 {
 671         int stid = -1;
 672         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 673
 674         spin_lock_bh(&t->stid_lock);
 675         if (t->sfree) {
 676                 union listen_entry *p = t->sfree;
 677
 678                 stid = (p - t->stid_tab) + t->stid_base;
 679                 t->sfree = p->next;
 680                 p->t3c_tid.ctx = ctx;
 681                 p->t3c_tid.client = client;
 682                 t->stids_in_use++;
 683         }
 684         spin_unlock_bh(&t->stid_lock);
 685         return stid;
 686 }
 687
 688 EXPORT_SYMBOL(cxgb3_alloc_stid);
 689
 690 /* Get the t3cdev associated with a net_device */
 691 struct t3cdev *dev2t3cdev(struct net_device *dev)
 692 {
 693         const struct port_info *pi = netdev_priv(dev);
 694
 695         return (struct t3cdev *)pi->adapter;
 696 }
 697
 698 EXPORT_SYMBOL(dev2t3cdev);
 699
 700 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 701 {
 702         struct cpl_smt_write_rpl *rpl = cplhdr(skb);
 703
 704         if (rpl->status != CPL_ERR_NONE)
 705                 printk(KERN_ERR
 706                        "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
 707                        rpl->status, GET_TID(rpl));
 708
 709         return CPL_RET_BUF_DONE;
 710 }
 711
 712 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 713 {
 714         struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
 715
 716         if (rpl->status != CPL_ERR_NONE)
 717                 printk(KERN_ERR
 718                        "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
 719                        rpl->status, GET_TID(rpl));
 720
 721         return CPL_RET_BUF_DONE;
 722 }
 723
 724 static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 725 {
 726         struct cpl_rte_write_rpl *rpl = cplhdr(skb);
 727
 728         if (rpl->status != CPL_ERR_NONE)
 729                 printk(KERN_ERR
 730                        "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
 731                        rpl->status, GET_TID(rpl));
 732
 733         return CPL_RET_BUF_DONE;
 734 }
 735
 736 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
 737 {
 738         struct cpl_act_open_rpl *rpl = cplhdr(skb);
 739         unsigned int atid = G_TID(ntohl(rpl->atid));
 740         struct t3c_tid_entry *t3c_tid;
 741
 742         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
 743         if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
 744             t3c_tid->client->handlers &&
 745             t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
 746                 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
 747                                                                     t3c_tid->
 748                                                                     ctx);
 749         } else {
 750                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 751                        dev->name, CPL_ACT_OPEN_RPL);
 752                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 753         }
 754 }
 755
 756 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 757 {
 758         union opcode_tid *p = cplhdr(skb);
 759         unsigned int stid = G_TID(ntohl(p->opcode_tid));
 760         struct t3c_tid_entry *t3c_tid;
 761
 762         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
 763         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 764             t3c_tid->client->handlers[p->opcode]) {
 765                 return t3c_tid->client->handlers[p->opcode] (dev, skb,
 766                                                              t3c_tid->ctx);
 767         } else {
 768                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 769                        dev->name, p->opcode);
 770                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 771         }
 772 }
 773
 774 static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 775 {
 776         union opcode_tid *p = cplhdr(skb);
 777         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 778         struct t3c_tid_entry *t3c_tid;
 779
 780         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 781         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 782             t3c_tid->client->handlers[p->opcode]) {
 783                 return t3c_tid->client->handlers[p->opcode]
 784                     (dev, skb, t3c_tid->ctx);
 785         } else {
 786                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 787                        dev->name, p->opcode);
 788                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 789         }
 790 }
 791
 792 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
 793 {
 794         struct cpl_pass_accept_req *req = cplhdr(skb);
 795         unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 796         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 797         struct t3c_tid_entry *t3c_tid;
 798         unsigned int tid = GET_TID(req);
 799
 800         if (unlikely(tid >= t->ntids)) {
 801                 printk("%s: passive open TID %u too large\n",
 802                        dev->name, tid);
 803                 t3_fatal_err(tdev2adap(dev));
 804                 return CPL_RET_BUF_DONE;
 805         }
 806
 807         t3c_tid = lookup_stid(t, stid);
 808         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 809             t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
 810                 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
 811                     (dev, skb, t3c_tid->ctx);
 812         } else {
 813                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 814                        dev->name, CPL_PASS_ACCEPT_REQ);
 815                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 816         }
 817 }
 818
 819 /*
 820  * Returns an sk_buff for a reply CPL message of size len.  If the input
 821  * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
 822  * is allocated.  The input skb must be of size at least len.  Note that this
 823  * operation does not destroy the original skb data even if it decides to reuse
 824  * the buffer.
 825  */
 826 static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
 827                                                gfp_t gfp)
 828 {
 829         if (likely(!skb_cloned(skb))) {
 830                 BUG_ON(skb->len < len);
 831                 __skb_trim(skb, len);
 832                 skb_get(skb);
 833         } else {
 834                 skb = alloc_skb(len, gfp);
 835                 if (skb)
 836                         __skb_put(skb, len);
 837         }
 838         return skb;
 839 }
 840
 841 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
 842 {
 843         union opcode_tid *p = cplhdr(skb);
 844         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 845         struct t3c_tid_entry *t3c_tid;
 846
 847         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 848         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 849             t3c_tid->client->handlers[p->opcode]) {
 850                 return t3c_tid->client->handlers[p->opcode]
 851                     (dev, skb, t3c_tid->ctx);
 852         } else {
 853                 struct cpl_abort_req_rss *req = cplhdr(skb);
 854                 struct cpl_abort_rpl *rpl;
 855                 struct sk_buff *reply_skb;
 856                 unsigned int tid = GET_TID(req);
 857                 u8 cmd = req->status;
 858
 859                 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
 860                     req->status == CPL_ERR_PERSIST_NEG_ADVICE)
 861                         goto out;
 862
 863                 reply_skb = cxgb3_get_cpl_reply_skb(skb,
 864                                                     sizeof(struct
 865                                                            cpl_abort_rpl),
 866                                                     GFP_ATOMIC);
 867
 868                 if (!reply_skb) {
 869                         printk("do_abort_req_rss: couldn't get skb!\n");
 870                         goto out;
 871                 }
 872                 reply_skb->priority = CPL_PRIORITY_DATA;
 873                 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
 874                 rpl = cplhdr(reply_skb);
 875                 rpl->wr.wr_hi =
 876                     htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
 877                 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
 878                 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
 879                 rpl->cmd = cmd;
 880                 cxgb3_ofld_send(dev, reply_skb);
 881 out:
 882                 return CPL_RET_BUF_DONE;
 883         }
 884 }
 885
 886 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
 887 {
 888         struct cpl_act_establish *req = cplhdr(skb);
 889         unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 890         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 891         struct t3c_tid_entry *t3c_tid;
 892         unsigned int tid = GET_TID(req);
 893
 894         if (unlikely(tid >= t->ntids)) {
 895                 printk("%s: active establish TID %u too large\n",
 896                        dev->name, tid);
 897                 t3_fatal_err(tdev2adap(dev));
 898                 return CPL_RET_BUF_DONE;
 899         }
 900
 901         t3c_tid = lookup_atid(t, atid);
 902         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 903             t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
 904                 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
 905                     (dev, skb, t3c_tid->ctx);
 906         } else {
 907                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 908                        dev->name, CPL_ACT_ESTABLISH);
 909                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 910         }
 911 }
 912
 913 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
 914 {
 915         struct cpl_trace_pkt *p = cplhdr(skb);
 916
 917         skb->protocol = htons(0xffff);
 918         skb->dev = dev->lldev;
 919         skb_pull(skb, sizeof(*p));
 920         skb_reset_mac_header(skb);
 921         netif_receive_skb(skb);
 922         return 0;
 923 }
 924
 925 /*
 926  * That skb would better have come from process_responses() where we abuse
 927  * ->priority and ->csum to carry our data.  NB: if we get to per-arch
 928  * ->csum, the things might get really interesting here.
 929  */
 930
 931 static inline u32 get_hwtid(struct sk_buff *skb)
 932 {
 933         return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
 934 }
 935
 936 static inline u32 get_opcode(struct sk_buff *skb)
 937 {
 938         return G_OPCODE(ntohl((__force __be32)skb->csum));
 939 }
 940
 941 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
 942 {
 943         unsigned int hwtid = get_hwtid(skb);
 944         unsigned int opcode = get_opcode(skb);
 945         struct t3c_tid_entry *t3c_tid;
 946
 947         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 948         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 949             t3c_tid->client->handlers[opcode]) {
 950                 return t3c_tid->client->handlers[opcode] (dev, skb,
 951                                                           t3c_tid->ctx);
 952         } else {
 953                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 954                        dev->name, opcode);
 955                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 956         }
 957 }
 958
 959 static int nb_callback(struct notifier_block *self, unsigned long event,
 960                        void *ctx)
 961 {
 962         switch (event) {
 963         case (NETEVENT_NEIGH_UPDATE):{
 964                 cxgb_neigh_update((struct neighbour *)ctx);
 965                 break;
 966         }
 967         case (NETEVENT_PMTU_UPDATE):
 968                 break;
 969         case (NETEVENT_REDIRECT):{
 970                 struct netevent_redirect *nr = ctx;
 971                 cxgb_redirect(nr->old, nr->new);
 972                 cxgb_neigh_update(nr->new->neighbour);
 973                 break;
 974         }
 975         default:
 976                 break;
 977         }
 978         return 0;
 979 }
 980
 981 static struct notifier_block nb = {
 982         .notifier_call = nb_callback
 983 };
 984
 985 /*
 986  * Process a received packet with an unknown/unexpected CPL opcode.
 987  */
 988 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
 989 {
 990         printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
 991                *skb->data);
 992         return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 993 }
 994
 995 /*
 996  * Handlers for each CPL opcode
 997  */
 998 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
 999
1000 /*
1001  * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
1002  * to unregister an existing handler.
1003  */
1004 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
1005 {
1006         if (opcode < NUM_CPL_CMDS)
1007                 cpl_handlers[opcode] = h ? h : do_bad_cpl;
1008         else
1009                 printk(KERN_ERR "T3C: handler registration for "
1010                        "opcode %x failed\n", opcode);
1011 }
1012
1013 EXPORT_SYMBOL(t3_register_cpl_handler);
1014
1015 /*
1016  * T3CDEV's receive method.
1017  */
1018 int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
1019 {
1020         while (n--) {
1021                 struct sk_buff *skb = *skbs++;
1022                 unsigned int opcode = get_opcode(skb);
1023                 int ret = cpl_handlers[opcode] (dev, skb);
1024
1025 #if VALIDATE_TID
1026                 if (ret & CPL_RET_UNKNOWN_TID) {
1027                         union opcode_tid *p = cplhdr(skb);
1028
1029                         printk(KERN_ERR "%s: CPL message (opcode %u) had "
1030                                "unknown TID %u\n", dev->name, opcode,
1031                                G_TID(ntohl(p->opcode_tid)));
1032                 }
1033 #endif
1034                 if (ret & CPL_RET_BUF_DONE)
1035                         kfree_skb(skb);
1036         }
1037         return 0;
1038 }
1039
1040 /*
1041  * Sends an sk_buff to a T3C driver after dealing with any active network taps.
1042  */
1043 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
1044 {
1045         int r;
1046
1047         local_bh_disable();
1048         r = dev->send(dev, skb);
1049         local_bh_enable();
1050         return r;
1051 }
1052
1053 EXPORT_SYMBOL(cxgb3_ofld_send);
1054
1055 static int is_offloading(struct net_device *dev)
1056 {
1057         struct adapter *adapter;
1058         int i;
1059
1060         read_lock_bh(&adapter_list_lock);
1061         list_for_each_entry(adapter, &adapter_list, adapter_list) {
1062                 for_each_port(adapter, i) {
1063                         if (dev == adapter->port[i]) {
1064                                 read_unlock_bh(&adapter_list_lock);
1065                                 return 1;
1066                         }
1067                 }
1068         }
1069         read_unlock_bh(&adapter_list_lock);
1070         return 0;
1071 }
1072
1073 void cxgb_neigh_update(struct neighbour *neigh)
1074 {
1075         struct net_device *dev = neigh->dev;
1076
1077         if (dev && (is_offloading(dev))) {
1078                 struct t3cdev *tdev = dev2t3cdev(dev);
1079
1080                 BUG_ON(!tdev);
1081                 t3_l2t_update(tdev, neigh);
1082         }
1083 }
1084
1085 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
1086 {
1087         struct sk_buff *skb;
1088         struct cpl_set_tcb_field *req;
1089
1090         skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
1091         if (!skb) {
1092                 printk(KERN_ERR "%s: cannot allocate skb!\n", __func__);
1093                 return;
1094         }
1095         skb->priority = CPL_PRIORITY_CONTROL;
1096         req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
1097         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1098         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1099         req->reply = 0;
1100         req->cpu_idx = 0;
1101         req->word = htons(W_TCB_L2T_IX);
1102         req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
1103         req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
1104         tdev->send(tdev, skb);
1105 }
1106
1107 void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
1108 {
1109         struct net_device *olddev, *newdev;
1110         struct tid_info *ti;
1111         struct t3cdev *tdev;
1112         u32 tid;
1113         int update_tcb;
1114         struct l2t_entry *e;
1115         struct t3c_tid_entry *te;
1116
1117         olddev = old->neighbour->dev;
1118         newdev = new->neighbour->dev;
1119         if (!is_offloading(olddev))
1120                 return;
1121         if (!is_offloading(newdev)) {
1122                 printk(KERN_WARNING "%s: Redirect to non-offload "
1123                        "device ignored.\n", __func__);
1124                 return;
1125         }
1126         tdev = dev2t3cdev(olddev);
1127         BUG_ON(!tdev);
1128         if (tdev != dev2t3cdev(newdev)) {
1129                 printk(KERN_WARNING "%s: Redirect to different "
1130                        "offload device ignored.\n", __func__);
1131                 return;
1132         }
1133
1134         /* Add new L2T entry */
1135         e = t3_l2t_get(tdev, new->neighbour, newdev);
1136         if (!e) {
1137                 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
1138                        __func__);
1139                 return;
1140         }
1141
1142         /* Walk tid table and notify clients of dst change. */
1143         ti = &(T3C_DATA(tdev))->tid_maps;
1144         for (tid = 0; tid < ti->ntids; tid++) {
1145                 te = lookup_tid(ti, tid);
1146                 BUG_ON(!te);
1147                 if (te && te->ctx && te->client && te->client->redirect) {
1148                         update_tcb = te->client->redirect(te->ctx, old, new, e);
1149                         if (update_tcb) {
1150                                 l2t_hold(L2DATA(tdev), e);
1151                                 set_l2t_ix(tdev, tid, e);
1152                         }
1153                 }
1154         }
1155         l2t_release(L2DATA(tdev), e);
1156 }
1157
1158 /*
1159  * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1160  * The allocated memory is cleared.
1161  */
1162 void *cxgb_alloc_mem(unsigned long size)
1163 {
1164         void *p = kmalloc(size, GFP_KERNEL);
1165
1166         if (!p)
1167                 p = vmalloc(size);
1168         if (p)
1169                 memset(p, 0, size);
1170         return p;
1171 }
1172
1173 /*
1174  * Free memory allocated through t3_alloc_mem().
1175  */
1176 void cxgb_free_mem(void *addr)
1177 {
1178         if (is_vmalloc_addr(addr))
1179                 vfree(addr);
1180         else
1181                 kfree(addr);
1182 }
1183
1184 /*
1185  * Allocate and initialize the TID tables.  Returns 0 on success.
1186  */
1187 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1188                          unsigned int natids, unsigned int nstids,
1189                          unsigned int atid_base, unsigned int stid_base)
1190 {
1191         unsigned long size = ntids * sizeof(*t->tid_tab) +
1192             natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1193
1194         t->tid_tab = cxgb_alloc_mem(size);
1195         if (!t->tid_tab)
1196                 return -ENOMEM;
1197
1198         t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1199         t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1200         t->ntids = ntids;
1201         t->nstids = nstids;
1202         t->stid_base = stid_base;
1203         t->sfree = NULL;
1204         t->natids = natids;
1205         t->atid_base = atid_base;
1206         t->afree = NULL;
1207         t->stids_in_use = t->atids_in_use = 0;
1208         atomic_set(&t->tids_in_use, 0);
1209         spin_lock_init(&t->stid_lock);
1210         spin_lock_init(&t->atid_lock);
1211
1212         /*
1213          * Setup the free lists for stid_tab and atid_tab.
1214          */
1215         if (nstids) {
1216                 while (--nstids)
1217                         t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1218                 t->sfree = t->stid_tab;
1219         }
1220         if (natids) {
1221                 while (--natids)
1222                         t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1223                 t->afree = t->atid_tab;
1224         }
1225         return 0;
1226 }
1227
1228 static void free_tid_maps(struct tid_info *t)
1229 {
1230         cxgb_free_mem(t->tid_tab);
1231 }
1232
1233 static inline void add_adapter(struct adapter *adap)
1234 {
1235         write_lock_bh(&adapter_list_lock);
1236         list_add_tail(&adap->adapter_list, &adapter_list);
1237         write_unlock_bh(&adapter_list_lock);
1238 }
1239
1240 static inline void remove_adapter(struct adapter *adap)
1241 {
1242         write_lock_bh(&adapter_list_lock);
1243         list_del(&adap->adapter_list);
1244         write_unlock_bh(&adapter_list_lock);
1245 }
1246
1247 int cxgb3_offload_activate(struct adapter *adapter)
1248 {
1249         struct t3cdev *dev = &adapter->tdev;
1250         int natids, err;
1251         struct t3c_data *t;
1252         struct tid_range stid_range, tid_range;
1253         struct mtutab mtutab;
1254         unsigned int l2t_capacity;
1255
1256         t = kzalloc(sizeof(*t), GFP_KERNEL);
1257         if (!t)
1258                 return -ENOMEM;
1259
1260         err = -EOPNOTSUPP;
1261         if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1262             dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1263             dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1264             dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1265             dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1266             dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1267                 goto out_free;
1268
1269         err = -ENOMEM;
1270         L2DATA(dev) = t3_init_l2t(l2t_capacity);
1271         if (!L2DATA(dev))
1272                 goto out_free;
1273
1274         natids = min(tid_range.num / 2, MAX_ATIDS);
1275         err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1276                             stid_range.num, ATID_BASE, stid_range.base);
1277         if (err)
1278                 goto out_free_l2t;
1279
1280         t->mtus = mtutab.mtus;
1281         t->nmtus = mtutab.size;
1282
1283         INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1284         spin_lock_init(&t->tid_release_lock);
1285         INIT_LIST_HEAD(&t->list_node);
1286         t->dev = dev;
1287
1288         T3C_DATA(dev) = t;
1289         dev->recv = process_rx;
1290         dev->neigh_update = t3_l2t_update;
1291
1292         /* Register netevent handler once */
1293         if (list_empty(&adapter_list))
1294                 register_netevent_notifier(&nb);
1295
1296         t->nofail_skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_KERNEL);
1297         t->release_list_incomplete = 0;
1298
1299         add_adapter(adapter);
1300         return 0;
1301
1302 out_free_l2t:
1303         t3_free_l2t(L2DATA(dev));
1304         L2DATA(dev) = NULL;
1305 out_free:
1306         kfree(t);
1307         return err;
1308 }
1309
1310 void cxgb3_offload_deactivate(struct adapter *adapter)
1311 {
1312         struct t3cdev *tdev = &adapter->tdev;
1313         struct t3c_data *t = T3C_DATA(tdev);
1314
1315         remove_adapter(adapter);
1316         if (list_empty(&adapter_list))
1317                 unregister_netevent_notifier(&nb);
1318
1319         free_tid_maps(&t->tid_maps);
1320         T3C_DATA(tdev) = NULL;
1321         t3_free_l2t(L2DATA(tdev));
1322         L2DATA(tdev) = NULL;
1323         if (t->nofail_skb)
1324                 kfree_skb(t->nofail_skb);
1325         kfree(t);
1326 }
1327
1328 static inline void register_tdev(struct t3cdev *tdev)
1329 {
1330         static int unit;
1331
1332         mutex_lock(&cxgb3_db_lock);
1333         snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1334         list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1335         mutex_unlock(&cxgb3_db_lock);
1336 }
1337
1338 static inline void unregister_tdev(struct t3cdev *tdev)
1339 {
1340         mutex_lock(&cxgb3_db_lock);
1341         list_del(&tdev->ofld_dev_list);
1342         mutex_unlock(&cxgb3_db_lock);
1343 }
1344
1345 static inline int adap2type(struct adapter *adapter)
1346 {
1347         int type = 0;
1348
1349         switch (adapter->params.rev) {
1350         case T3_REV_A:
1351                 type = T3A;
1352                 break;
1353         case T3_REV_B:
1354         case T3_REV_B2:
1355                 type = T3B;
1356                 break;
1357         case T3_REV_C:
1358                 type = T3C;
1359                 break;
1360         }
1361         return type;
1362 }
1363
1364 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1365 {
1366         struct t3cdev *tdev = &adapter->tdev;
1367
1368         INIT_LIST_HEAD(&tdev->ofld_dev_list);
1369
1370         cxgb3_set_dummy_ops(tdev);
1371         tdev->send = t3_offload_tx;
1372         tdev->ctl = cxgb_offload_ctl;
1373         tdev->type = adap2type(adapter);
1374
1375         register_tdev(tdev);
1376 }
1377
1378 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1379 {
1380         struct t3cdev *tdev = &adapter->tdev;
1381
1382         tdev->recv = NULL;
1383         tdev->neigh_update = NULL;
1384
1385         unregister_tdev(tdev);
1386 }
1387
1388 void __init cxgb3_offload_init(void)
1389 {
1390         int i;
1391
1392         for (i = 0; i < NUM_CPL_CMDS; ++i)
1393                 cpl_handlers[i] = do_bad_cpl;
1394
1395         t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1396         t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1397         t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
1398         t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1399         t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1400         t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1401         t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1402         t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1403         t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1404         t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1405         t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1406         t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1407         t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1408         t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1409         t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1410         t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1411         t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1412         t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1413         t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1414         t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1415         t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1416         t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1417         t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1418         t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1419         t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1420         t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1421 }