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_event_notify(struct t3cdev *tdev, u32 event, u32 port)
 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->event_handler)
 163                         client->event_handler(tdev, event, port);
 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);
 570                 if (!skb)
 571                         skb = td->nofail_skb;
 572                 if (!skb) {
 573                         spin_lock_bh(&td->tid_release_lock);
 574                         p->ctx = (void *)td->tid_release_list;
 575                         td->tid_release_list = (struct t3c_tid_entry *)p;
 576                         break;
 577                 }
 578                 mk_tid_release(skb, p - td->tid_maps.tid_tab);
 579                 cxgb3_ofld_send(tdev, skb);
 580                 p->ctx = NULL;
 581                 if (skb == td->nofail_skb)
 582                         td->nofail_skb =
 583                                 alloc_skb(sizeof(struct cpl_tid_release),
 584                                         GFP_KERNEL);
 585                 spin_lock_bh(&td->tid_release_lock);
 586         }
 587         td->release_list_incomplete = (td->tid_release_list == NULL) ? 0 : 1;
 588         spin_unlock_bh(&td->tid_release_lock);
 589
 590         if (!td->nofail_skb)
 591                 td->nofail_skb =
 592                         alloc_skb(sizeof(struct cpl_tid_release),
 593                                 GFP_KERNEL);
 594 }
 595
 596 /* use ctx as a next pointer in the tid release list */
 597 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
 598 {
 599         struct t3c_data *td = T3C_DATA(tdev);
 600         struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
 601
 602         spin_lock_bh(&td->tid_release_lock);
 603         p->ctx = (void *)td->tid_release_list;
 604         p->client = NULL;
 605         td->tid_release_list = p;
 606         if (!p->ctx || td->release_list_incomplete)
 607                 schedule_work(&td->tid_release_task);
 608         spin_unlock_bh(&td->tid_release_lock);
 609 }
 610
 611 EXPORT_SYMBOL(cxgb3_queue_tid_release);
 612
 613 /*
 614  * Remove a tid from the TID table.  A client may defer processing its last
 615  * CPL message if it is locked at the time it arrives, and while the message
 616  * sits in the client's backlog the TID may be reused for another connection.
 617  * To handle this we atomically switch the TID association if it still points
 618  * to the original client context.
 619  */
 620 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
 621 {
 622         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 623
 624         BUG_ON(tid >= t->ntids);
 625         if (tdev->type == T3A)
 626                 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
 627         else {
 628                 struct sk_buff *skb;
 629
 630                 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
 631                 if (likely(skb)) {
 632                         mk_tid_release(skb, tid);
 633                         cxgb3_ofld_send(tdev, skb);
 634                         t->tid_tab[tid].ctx = NULL;
 635                 } else
 636                         cxgb3_queue_tid_release(tdev, tid);
 637         }
 638         atomic_dec(&t->tids_in_use);
 639 }
 640
 641 EXPORT_SYMBOL(cxgb3_remove_tid);
 642
 643 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
 644                      void *ctx)
 645 {
 646         int atid = -1;
 647         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 648
 649         spin_lock_bh(&t->atid_lock);
 650         if (t->afree &&
 651             t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
 652             t->ntids) {
 653                 union active_open_entry *p = t->afree;
 654
 655                 atid = (p - t->atid_tab) + t->atid_base;
 656                 t->afree = p->next;
 657                 p->t3c_tid.ctx = ctx;
 658                 p->t3c_tid.client = client;
 659                 t->atids_in_use++;
 660         }
 661         spin_unlock_bh(&t->atid_lock);
 662         return atid;
 663 }
 664
 665 EXPORT_SYMBOL(cxgb3_alloc_atid);
 666
 667 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
 668                      void *ctx)
 669 {
 670         int stid = -1;
 671         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 672
 673         spin_lock_bh(&t->stid_lock);
 674         if (t->sfree) {
 675                 union listen_entry *p = t->sfree;
 676
 677                 stid = (p - t->stid_tab) + t->stid_base;
 678                 t->sfree = p->next;
 679                 p->t3c_tid.ctx = ctx;
 680                 p->t3c_tid.client = client;
 681                 t->stids_in_use++;
 682         }
 683         spin_unlock_bh(&t->stid_lock);
 684         return stid;
 685 }
 686
 687 EXPORT_SYMBOL(cxgb3_alloc_stid);
 688
 689 /* Get the t3cdev associated with a net_device */
 690 struct t3cdev *dev2t3cdev(struct net_device *dev)
 691 {
 692         const struct port_info *pi = netdev_priv(dev);
 693
 694         return (struct t3cdev *)pi->adapter;
 695 }
 696
 697 EXPORT_SYMBOL(dev2t3cdev);
 698
 699 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 700 {
 701         struct cpl_smt_write_rpl *rpl = cplhdr(skb);
 702
 703         if (rpl->status != CPL_ERR_NONE)
 704                 printk(KERN_ERR
 705                        "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
 706                        rpl->status, GET_TID(rpl));
 707
 708         return CPL_RET_BUF_DONE;
 709 }
 710
 711 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 712 {
 713         struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
 714
 715         if (rpl->status != CPL_ERR_NONE)
 716                 printk(KERN_ERR
 717                        "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
 718                        rpl->status, GET_TID(rpl));
 719
 720         return CPL_RET_BUF_DONE;
 721 }
 722
 723 static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 724 {
 725         struct cpl_rte_write_rpl *rpl = cplhdr(skb);
 726
 727         if (rpl->status != CPL_ERR_NONE)
 728                 printk(KERN_ERR
 729                        "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
 730                        rpl->status, GET_TID(rpl));
 731
 732         return CPL_RET_BUF_DONE;
 733 }
 734
 735 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
 736 {
 737         struct cpl_act_open_rpl *rpl = cplhdr(skb);
 738         unsigned int atid = G_TID(ntohl(rpl->atid));
 739         struct t3c_tid_entry *t3c_tid;
 740
 741         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
 742         if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
 743             t3c_tid->client->handlers &&
 744             t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
 745                 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
 746                                                                     t3c_tid->
 747                                                                     ctx);
 748         } else {
 749                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 750                        dev->name, CPL_ACT_OPEN_RPL);
 751                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 752         }
 753 }
 754
 755 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 756 {
 757         union opcode_tid *p = cplhdr(skb);
 758         unsigned int stid = G_TID(ntohl(p->opcode_tid));
 759         struct t3c_tid_entry *t3c_tid;
 760
 761         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
 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] (dev, skb,
 765                                                              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_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 774 {
 775         union opcode_tid *p = cplhdr(skb);
 776         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 777         struct t3c_tid_entry *t3c_tid;
 778
 779         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 780         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 781             t3c_tid->client->handlers[p->opcode]) {
 782                 return t3c_tid->client->handlers[p->opcode]
 783                     (dev, skb, t3c_tid->ctx);
 784         } else {
 785                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 786                        dev->name, p->opcode);
 787                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 788         }
 789 }
 790
 791 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
 792 {
 793         struct cpl_pass_accept_req *req = cplhdr(skb);
 794         unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 795         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 796         struct t3c_tid_entry *t3c_tid;
 797         unsigned int tid = GET_TID(req);
 798
 799         if (unlikely(tid >= t->ntids)) {
 800                 printk("%s: passive open TID %u too large\n",
 801                        dev->name, tid);
 802                 t3_fatal_err(tdev2adap(dev));
 803                 return CPL_RET_BUF_DONE;
 804         }
 805
 806         t3c_tid = lookup_stid(t, stid);
 807         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 808             t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
 809                 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
 810                     (dev, skb, t3c_tid->ctx);
 811         } else {
 812                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 813                        dev->name, CPL_PASS_ACCEPT_REQ);
 814                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 815         }
 816 }
 817
 818 /*
 819  * Returns an sk_buff for a reply CPL message of size len.  If the input
 820  * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
 821  * is allocated.  The input skb must be of size at least len.  Note that this
 822  * operation does not destroy the original skb data even if it decides to reuse
 823  * the buffer.
 824  */
 825 static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
 826                                                gfp_t gfp)
 827 {
 828         if (likely(!skb_cloned(skb))) {
 829                 BUG_ON(skb->len < len);
 830                 __skb_trim(skb, len);
 831                 skb_get(skb);
 832         } else {
 833                 skb = alloc_skb(len, gfp);
 834                 if (skb)
 835                         __skb_put(skb, len);
 836         }
 837         return skb;
 838 }
 839
 840 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
 841 {
 842         union opcode_tid *p = cplhdr(skb);
 843         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 844         struct t3c_tid_entry *t3c_tid;
 845
 846         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 847         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 848             t3c_tid->client->handlers[p->opcode]) {
 849                 return t3c_tid->client->handlers[p->opcode]
 850                     (dev, skb, t3c_tid->ctx);
 851         } else {
 852                 struct cpl_abort_req_rss *req = cplhdr(skb);
 853                 struct cpl_abort_rpl *rpl;
 854                 struct sk_buff *reply_skb;
 855                 unsigned int tid = GET_TID(req);
 856                 u8 cmd = req->status;
 857
 858                 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
 859                     req->status == CPL_ERR_PERSIST_NEG_ADVICE)
 860                         goto out;
 861
 862                 reply_skb = cxgb3_get_cpl_reply_skb(skb,
 863                                                     sizeof(struct
 864                                                            cpl_abort_rpl),
 865                                                     GFP_ATOMIC);
 866
 867                 if (!reply_skb) {
 868                         printk("do_abort_req_rss: couldn't get skb!\n");
 869                         goto out;
 870                 }
 871                 reply_skb->priority = CPL_PRIORITY_DATA;
 872                 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
 873                 rpl = cplhdr(reply_skb);
 874                 rpl->wr.wr_hi =
 875                     htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
 876                 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
 877                 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
 878                 rpl->cmd = cmd;
 879                 cxgb3_ofld_send(dev, reply_skb);
 880 out:
 881                 return CPL_RET_BUF_DONE;
 882         }
 883 }
 884
 885 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
 886 {
 887         struct cpl_act_establish *req = cplhdr(skb);
 888         unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 889         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 890         struct t3c_tid_entry *t3c_tid;
 891         unsigned int tid = GET_TID(req);
 892
 893         if (unlikely(tid >= t->ntids)) {
 894                 printk("%s: active establish TID %u too large\n",
 895                        dev->name, tid);
 896                 t3_fatal_err(tdev2adap(dev));
 897                 return CPL_RET_BUF_DONE;
 898         }
 899
 900         t3c_tid = lookup_atid(t, atid);
 901         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 902             t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
 903                 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
 904                     (dev, skb, t3c_tid->ctx);
 905         } else {
 906                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 907                        dev->name, CPL_ACT_ESTABLISH);
 908                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 909         }
 910 }
 911
 912 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
 913 {
 914         struct cpl_trace_pkt *p = cplhdr(skb);
 915
 916         skb->protocol = htons(0xffff);
 917         skb->dev = dev->lldev;
 918         skb_pull(skb, sizeof(*p));
 919         skb_reset_mac_header(skb);
 920         netif_receive_skb(skb);
 921         return 0;
 922 }
 923
 924 /*
 925  * That skb would better have come from process_responses() where we abuse
 926  * ->priority and ->csum to carry our data.  NB: if we get to per-arch
 927  * ->csum, the things might get really interesting here.
 928  */
 929
 930 static inline u32 get_hwtid(struct sk_buff *skb)
 931 {
 932         return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
 933 }
 934
 935 static inline u32 get_opcode(struct sk_buff *skb)
 936 {
 937         return G_OPCODE(ntohl((__force __be32)skb->csum));
 938 }
 939
 940 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
 941 {
 942         unsigned int hwtid = get_hwtid(skb);
 943         unsigned int opcode = get_opcode(skb);
 944         struct t3c_tid_entry *t3c_tid;
 945
 946         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 947         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 948             t3c_tid->client->handlers[opcode]) {
 949                 return t3c_tid->client->handlers[opcode] (dev, skb,
 950                                                           t3c_tid->ctx);
 951         } else {
 952                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 953                        dev->name, opcode);
 954                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 955         }
 956 }
 957
 958 static int nb_callback(struct notifier_block *self, unsigned long event,
 959                        void *ctx)
 960 {
 961         switch (event) {
 962         case (NETEVENT_NEIGH_UPDATE):{
 963                 cxgb_neigh_update((struct neighbour *)ctx);
 964                 break;
 965         }
 966         case (NETEVENT_PMTU_UPDATE):
 967                 break;
 968         case (NETEVENT_REDIRECT):{
 969                 struct netevent_redirect *nr = ctx;
 970                 cxgb_redirect(nr->old, nr->new);
 971                 cxgb_neigh_update(nr->new->neighbour);
 972                 break;
 973         }
 974         default:
 975                 break;
 976         }
 977         return 0;
 978 }
 979
 980 static struct notifier_block nb = {
 981         .notifier_call = nb_callback
 982 };
 983
 984 /*
 985  * Process a received packet with an unknown/unexpected CPL opcode.
 986  */
 987 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
 988 {
 989         printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
 990                *skb->data);
 991         return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 992 }
 993
 994 /*
 995  * Handlers for each CPL opcode
 996  */
 997 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
 998
 999 /*
1000  * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
1001  * to unregister an existing handler.
1002  */
1003 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
1004 {
1005         if (opcode < NUM_CPL_CMDS)
1006                 cpl_handlers[opcode] = h ? h : do_bad_cpl;
1007         else
1008                 printk(KERN_ERR "T3C: handler registration for "
1009                        "opcode %x failed\n", opcode);
1010 }
1011
1012 EXPORT_SYMBOL(t3_register_cpl_handler);
1013
1014 /*
1015  * T3CDEV's receive method.
1016  */
1017 int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
1018 {
1019         while (n--) {
1020                 struct sk_buff *skb = *skbs++;
1021                 unsigned int opcode = get_opcode(skb);
1022                 int ret = cpl_handlers[opcode] (dev, skb);
1023
1024 #if VALIDATE_TID
1025                 if (ret & CPL_RET_UNKNOWN_TID) {
1026                         union opcode_tid *p = cplhdr(skb);
1027
1028                         printk(KERN_ERR "%s: CPL message (opcode %u) had "
1029                                "unknown TID %u\n", dev->name, opcode,
1030                                G_TID(ntohl(p->opcode_tid)));
1031                 }
1032 #endif
1033                 if (ret & CPL_RET_BUF_DONE)
1034                         kfree_skb(skb);
1035         }
1036         return 0;
1037 }
1038
1039 /*
1040  * Sends an sk_buff to a T3C driver after dealing with any active network taps.
1041  */
1042 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
1043 {
1044         int r;
1045
1046         local_bh_disable();
1047         r = dev->send(dev, skb);
1048         local_bh_enable();
1049         return r;
1050 }
1051
1052 EXPORT_SYMBOL(cxgb3_ofld_send);
1053
1054 static int is_offloading(struct net_device *dev)
1055 {
1056         struct adapter *adapter;
1057         int i;
1058
1059         read_lock_bh(&adapter_list_lock);
1060         list_for_each_entry(adapter, &adapter_list, adapter_list) {
1061                 for_each_port(adapter, i) {
1062                         if (dev == adapter->port[i]) {
1063                                 read_unlock_bh(&adapter_list_lock);
1064                                 return 1;
1065                         }
1066                 }
1067         }
1068         read_unlock_bh(&adapter_list_lock);
1069         return 0;
1070 }
1071
1072 void cxgb_neigh_update(struct neighbour *neigh)
1073 {
1074         struct net_device *dev = neigh->dev;
1075
1076         if (dev && (is_offloading(dev))) {
1077                 struct t3cdev *tdev = dev2t3cdev(dev);
1078
1079                 BUG_ON(!tdev);
1080                 t3_l2t_update(tdev, neigh);
1081         }
1082 }
1083
1084 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
1085 {
1086         struct sk_buff *skb;
1087         struct cpl_set_tcb_field *req;
1088
1089         skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
1090         if (!skb) {
1091                 printk(KERN_ERR "%s: cannot allocate skb!\n", __func__);
1092                 return;
1093         }
1094         skb->priority = CPL_PRIORITY_CONTROL;
1095         req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
1096         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1097         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1098         req->reply = 0;
1099         req->cpu_idx = 0;
1100         req->word = htons(W_TCB_L2T_IX);
1101         req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
1102         req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
1103         tdev->send(tdev, skb);
1104 }
1105
1106 void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
1107 {
1108         struct net_device *olddev, *newdev;
1109         struct tid_info *ti;
1110         struct t3cdev *tdev;
1111         u32 tid;
1112         int update_tcb;
1113         struct l2t_entry *e;
1114         struct t3c_tid_entry *te;
1115
1116         olddev = old->neighbour->dev;
1117         newdev = new->neighbour->dev;
1118         if (!is_offloading(olddev))
1119                 return;
1120         if (!is_offloading(newdev)) {
1121                 printk(KERN_WARNING "%s: Redirect to non-offload "
1122                        "device ignored.\n", __func__);
1123                 return;
1124         }
1125         tdev = dev2t3cdev(olddev);
1126         BUG_ON(!tdev);
1127         if (tdev != dev2t3cdev(newdev)) {
1128                 printk(KERN_WARNING "%s: Redirect to different "
1129                        "offload device ignored.\n", __func__);
1130                 return;
1131         }
1132
1133         /* Add new L2T entry */
1134         e = t3_l2t_get(tdev, new->neighbour, newdev);
1135         if (!e) {
1136                 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
1137                        __func__);
1138                 return;
1139         }
1140
1141         /* Walk tid table and notify clients of dst change. */
1142         ti = &(T3C_DATA(tdev))->tid_maps;
1143         for (tid = 0; tid < ti->ntids; tid++) {
1144                 te = lookup_tid(ti, tid);
1145                 BUG_ON(!te);
1146                 if (te && te->ctx && te->client && te->client->redirect) {
1147                         update_tcb = te->client->redirect(te->ctx, old, new, e);
1148                         if (update_tcb) {
1149                                 l2t_hold(L2DATA(tdev), e);
1150                                 set_l2t_ix(tdev, tid, e);
1151                         }
1152                 }
1153         }
1154         l2t_release(L2DATA(tdev), e);
1155 }
1156
1157 /*
1158  * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1159  * The allocated memory is cleared.
1160  */
1161 void *cxgb_alloc_mem(unsigned long size)
1162 {
1163         void *p = kmalloc(size, GFP_KERNEL);
1164
1165         if (!p)
1166                 p = vmalloc(size);
1167         if (p)
1168                 memset(p, 0, size);
1169         return p;
1170 }
1171
1172 /*
1173  * Free memory allocated through t3_alloc_mem().
1174  */
1175 void cxgb_free_mem(void *addr)
1176 {
1177         if (is_vmalloc_addr(addr))
1178                 vfree(addr);
1179         else
1180                 kfree(addr);
1181 }
1182
1183 /*
1184  * Allocate and initialize the TID tables.  Returns 0 on success.
1185  */
1186 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1187                          unsigned int natids, unsigned int nstids,
1188                          unsigned int atid_base, unsigned int stid_base)
1189 {
1190         unsigned long size = ntids * sizeof(*t->tid_tab) +
1191             natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1192
1193         t->tid_tab = cxgb_alloc_mem(size);
1194         if (!t->tid_tab)
1195                 return -ENOMEM;
1196
1197         t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1198         t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1199         t->ntids = ntids;
1200         t->nstids = nstids;
1201         t->stid_base = stid_base;
1202         t->sfree = NULL;
1203         t->natids = natids;
1204         t->atid_base = atid_base;
1205         t->afree = NULL;
1206         t->stids_in_use = t->atids_in_use = 0;
1207         atomic_set(&t->tids_in_use, 0);
1208         spin_lock_init(&t->stid_lock);
1209         spin_lock_init(&t->atid_lock);
1210
1211         /*
1212          * Setup the free lists for stid_tab and atid_tab.
1213          */
1214         if (nstids) {
1215                 while (--nstids)
1216                         t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1217                 t->sfree = t->stid_tab;
1218         }
1219         if (natids) {
1220                 while (--natids)
1221                         t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1222                 t->afree = t->atid_tab;
1223         }
1224         return 0;
1225 }
1226
1227 static void free_tid_maps(struct tid_info *t)
1228 {
1229         cxgb_free_mem(t->tid_tab);
1230 }
1231
1232 static inline void add_adapter(struct adapter *adap)
1233 {
1234         write_lock_bh(&adapter_list_lock);
1235         list_add_tail(&adap->adapter_list, &adapter_list);
1236         write_unlock_bh(&adapter_list_lock);
1237 }
1238
1239 static inline void remove_adapter(struct adapter *adap)
1240 {
1241         write_lock_bh(&adapter_list_lock);
1242         list_del(&adap->adapter_list);
1243         write_unlock_bh(&adapter_list_lock);
1244 }
1245
1246 int cxgb3_offload_activate(struct adapter *adapter)
1247 {
1248         struct t3cdev *dev = &adapter->tdev;
1249         int natids, err;
1250         struct t3c_data *t;
1251         struct tid_range stid_range, tid_range;
1252         struct mtutab mtutab;
1253         unsigned int l2t_capacity;
1254
1255         t = kcalloc(1, sizeof(*t), GFP_KERNEL);
1256         if (!t)
1257                 return -ENOMEM;
1258
1259         err = -EOPNOTSUPP;
1260         if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1261             dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1262             dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1263             dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1264             dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1265             dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1266                 goto out_free;
1267
1268         err = -ENOMEM;
1269         L2DATA(dev) = t3_init_l2t(l2t_capacity);
1270         if (!L2DATA(dev))
1271                 goto out_free;
1272
1273         natids = min(tid_range.num / 2, MAX_ATIDS);
1274         err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1275                             stid_range.num, ATID_BASE, stid_range.base);
1276         if (err)
1277                 goto out_free_l2t;
1278
1279         t->mtus = mtutab.mtus;
1280         t->nmtus = mtutab.size;
1281
1282         INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1283         spin_lock_init(&t->tid_release_lock);
1284         INIT_LIST_HEAD(&t->list_node);
1285         t->dev = dev;
1286
1287         T3C_DATA(dev) = t;
1288         dev->recv = process_rx;
1289         dev->neigh_update = t3_l2t_update;
1290
1291         /* Register netevent handler once */
1292         if (list_empty(&adapter_list))
1293                 register_netevent_notifier(&nb);
1294
1295         t->nofail_skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_KERNEL);
1296         t->release_list_incomplete = 0;
1297
1298         add_adapter(adapter);
1299         return 0;
1300
1301 out_free_l2t:
1302         t3_free_l2t(L2DATA(dev));
1303         L2DATA(dev) = NULL;
1304 out_free:
1305         kfree(t);
1306         return err;
1307 }
1308
1309 void cxgb3_offload_deactivate(struct adapter *adapter)
1310 {
1311         struct t3cdev *tdev = &adapter->tdev;
1312         struct t3c_data *t = T3C_DATA(tdev);
1313
1314         remove_adapter(adapter);
1315         if (list_empty(&adapter_list))
1316                 unregister_netevent_notifier(&nb);
1317
1318         free_tid_maps(&t->tid_maps);
1319         T3C_DATA(tdev) = NULL;
1320         t3_free_l2t(L2DATA(tdev));
1321         L2DATA(tdev) = NULL;
1322         if (t->nofail_skb)
1323                 kfree_skb(t->nofail_skb);
1324         kfree(t);
1325 }
1326
1327 static inline void register_tdev(struct t3cdev *tdev)
1328 {
1329         static int unit;
1330
1331         mutex_lock(&cxgb3_db_lock);
1332         snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1333         list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1334         mutex_unlock(&cxgb3_db_lock);
1335 }
1336
1337 static inline void unregister_tdev(struct t3cdev *tdev)
1338 {
1339         mutex_lock(&cxgb3_db_lock);
1340         list_del(&tdev->ofld_dev_list);
1341         mutex_unlock(&cxgb3_db_lock);
1342 }
1343
1344 static inline int adap2type(struct adapter *adapter)
1345 {
1346         int type = 0;
1347
1348         switch (adapter->params.rev) {
1349         case T3_REV_A:
1350                 type = T3A;
1351                 break;
1352         case T3_REV_B:
1353         case T3_REV_B2:
1354                 type = T3B;
1355                 break;
1356         case T3_REV_C:
1357                 type = T3C;
1358                 break;
1359         }
1360         return type;
1361 }
1362
1363 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1364 {
1365         struct t3cdev *tdev = &adapter->tdev;
1366
1367         INIT_LIST_HEAD(&tdev->ofld_dev_list);
1368
1369         cxgb3_set_dummy_ops(tdev);
1370         tdev->send = t3_offload_tx;
1371         tdev->ctl = cxgb_offload_ctl;
1372         tdev->type = adap2type(adapter);
1373
1374         register_tdev(tdev);
1375 }
1376
1377 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1378 {
1379         struct t3cdev *tdev = &adapter->tdev;
1380
1381         tdev->recv = NULL;
1382         tdev->neigh_update = NULL;
1383
1384         unregister_tdev(tdev);
1385 }
1386
1387 void __init cxgb3_offload_init(void)
1388 {
1389         int i;
1390
1391         for (i = 0; i < NUM_CPL_CMDS; ++i)
1392                 cpl_handlers[i] = do_bad_cpl;
1393
1394         t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1395         t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1396         t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
1397         t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1398         t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1399         t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1400         t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1401         t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1402         t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1403         t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1404         t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1405         t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1406         t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1407         t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1408         t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1409         t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1410         t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1411         t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1412         t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1413         t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1414         t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1415         t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1416         t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1417         t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1418         t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1419         t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1420 }