Merge branch 'master' into next
[linux-2.6] / 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 static struct net_device *get_iff_from_mac(struct adapter *adapter,
157                                            const unsigned char *mac,
158                                            unsigned int vlan)
159 {
160         int i;
161
162         for_each_port(adapter, i) {
163                 struct vlan_group *grp;
164                 struct net_device *dev = adapter->port[i];
165                 const struct port_info *p = netdev_priv(dev);
166
167                 if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) {
168                         if (vlan && vlan != VLAN_VID_MASK) {
169                                 grp = p->vlan_grp;
170                                 dev = NULL;
171                                 if (grp)
172                                         dev = vlan_group_get_device(grp, vlan);
173                         } else
174                                 while (dev->master)
175                                         dev = dev->master;
176                         return dev;
177                 }
178         }
179         return NULL;
180 }
181
182 static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
183                               void *data)
184 {
185         int ret = 0;
186         struct ulp_iscsi_info *uiip = data;
187
188         switch (req) {
189         case ULP_ISCSI_GET_PARAMS:
190                 uiip->pdev = adapter->pdev;
191                 uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
192                 uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
193                 uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
194                 /*
195                  * On tx, the iscsi pdu has to be <= tx page size and has to
196                  * fit into the Tx PM FIFO.
197                  */
198                 uiip->max_txsz = min(adapter->params.tp.tx_pg_size,
199                                      t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
200                 /* on rx, the iscsi pdu has to be < rx page size and the
201                    whole pdu + cpl headers has to fit into one sge buffer */
202                 uiip->max_rxsz = min_t(unsigned int,
203                                        adapter->params.tp.rx_pg_size,
204                                        (adapter->sge.qs[0].fl[1].buf_size -
205                                         sizeof(struct cpl_rx_data) * 2 -
206                                         sizeof(struct cpl_rx_data_ddp)));
207                 break;
208         case ULP_ISCSI_SET_PARAMS:
209                 t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
210                 /* set MaxRxData and MaxCoalesceSize to 16224 */
211                 t3_write_reg(adapter, A_TP_PARA_REG2, 0x3f603f60);
212                 /* program the ddp page sizes */
213                 {
214                         int i;
215                         unsigned int val = 0;
216                         for (i = 0; i < 4; i++)
217                                 val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
218                         if (val)
219                                 t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
220                 }
221                 break;
222         default:
223                 ret = -EOPNOTSUPP;
224         }
225         return ret;
226 }
227
228 /* Response queue used for RDMA events. */
229 #define ASYNC_NOTIF_RSPQ 0
230
231 static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
232 {
233         int ret = 0;
234
235         switch (req) {
236         case RDMA_GET_PARAMS: {
237                 struct rdma_info *rdma = data;
238                 struct pci_dev *pdev = adapter->pdev;
239
240                 rdma->udbell_physbase = pci_resource_start(pdev, 2);
241                 rdma->udbell_len = pci_resource_len(pdev, 2);
242                 rdma->tpt_base =
243                         t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
244                 rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
245                 rdma->pbl_base =
246                         t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
247                 rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
248                 rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
249                 rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
250                 rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
251                 rdma->pdev = pdev;
252                 break;
253         }
254         case RDMA_CQ_OP:{
255                 unsigned long flags;
256                 struct rdma_cq_op *rdma = data;
257
258                 /* may be called in any context */
259                 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
260                 ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
261                                         rdma->credits);
262                 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
263                 break;
264         }
265         case RDMA_GET_MEM:{
266                 struct ch_mem_range *t = data;
267                 struct mc7 *mem;
268
269                 if ((t->addr & 7) || (t->len & 7))
270                         return -EINVAL;
271                 if (t->mem_id == MEM_CM)
272                         mem = &adapter->cm;
273                 else if (t->mem_id == MEM_PMRX)
274                         mem = &adapter->pmrx;
275                 else if (t->mem_id == MEM_PMTX)
276                         mem = &adapter->pmtx;
277                 else
278                         return -EINVAL;
279
280                 ret =
281                         t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
282                                         (u64 *) t->buf);
283                 if (ret)
284                         return ret;
285                 break;
286         }
287         case RDMA_CQ_SETUP:{
288                 struct rdma_cq_setup *rdma = data;
289
290                 spin_lock_irq(&adapter->sge.reg_lock);
291                 ret =
292                         t3_sge_init_cqcntxt(adapter, rdma->id,
293                                         rdma->base_addr, rdma->size,
294                                         ASYNC_NOTIF_RSPQ,
295                                         rdma->ovfl_mode, rdma->credits,
296                                         rdma->credit_thres);
297                 spin_unlock_irq(&adapter->sge.reg_lock);
298                 break;
299         }
300         case RDMA_CQ_DISABLE:
301                 spin_lock_irq(&adapter->sge.reg_lock);
302                 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
303                 spin_unlock_irq(&adapter->sge.reg_lock);
304                 break;
305         case RDMA_CTRL_QP_SETUP:{
306                 struct rdma_ctrlqp_setup *rdma = data;
307
308                 spin_lock_irq(&adapter->sge.reg_lock);
309                 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
310                                                 SGE_CNTXT_RDMA,
311                                                 ASYNC_NOTIF_RSPQ,
312                                                 rdma->base_addr, rdma->size,
313                                                 FW_RI_TID_START, 1, 0);
314                 spin_unlock_irq(&adapter->sge.reg_lock);
315                 break;
316         }
317         case RDMA_GET_MIB: {
318                 spin_lock(&adapter->stats_lock);
319                 t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
320                 spin_unlock(&adapter->stats_lock);
321                 break;
322         }
323         default:
324                 ret = -EOPNOTSUPP;
325         }
326         return ret;
327 }
328
329 static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
330 {
331         struct adapter *adapter = tdev2adap(tdev);
332         struct tid_range *tid;
333         struct mtutab *mtup;
334         struct iff_mac *iffmacp;
335         struct ddp_params *ddpp;
336         struct adap_ports *ports;
337         struct ofld_page_info *rx_page_info;
338         struct tp_params *tp = &adapter->params.tp;
339         int i;
340
341         switch (req) {
342         case GET_MAX_OUTSTANDING_WR:
343                 *(unsigned int *)data = FW_WR_NUM;
344                 break;
345         case GET_WR_LEN:
346                 *(unsigned int *)data = WR_FLITS;
347                 break;
348         case GET_TX_MAX_CHUNK:
349                 *(unsigned int *)data = 1 << 20;        /* 1MB */
350                 break;
351         case GET_TID_RANGE:
352                 tid = data;
353                 tid->num = t3_mc5_size(&adapter->mc5) -
354                     adapter->params.mc5.nroutes -
355                     adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
356                 tid->base = 0;
357                 break;
358         case GET_STID_RANGE:
359                 tid = data;
360                 tid->num = adapter->params.mc5.nservers;
361                 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
362                     adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
363                 break;
364         case GET_L2T_CAPACITY:
365                 *(unsigned int *)data = 2048;
366                 break;
367         case GET_MTUS:
368                 mtup = data;
369                 mtup->size = NMTUS;
370                 mtup->mtus = adapter->params.mtus;
371                 break;
372         case GET_IFF_FROM_MAC:
373                 iffmacp = data;
374                 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
375                                                 iffmacp->vlan_tag &
376                                                 VLAN_VID_MASK);
377                 break;
378         case GET_DDP_PARAMS:
379                 ddpp = data;
380                 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
381                 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
382                 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
383                 break;
384         case GET_PORTS:
385                 ports = data;
386                 ports->nports = adapter->params.nports;
387                 for_each_port(adapter, i)
388                         ports->lldevs[i] = adapter->port[i];
389                 break;
390         case ULP_ISCSI_GET_PARAMS:
391         case ULP_ISCSI_SET_PARAMS:
392                 if (!offload_running(adapter))
393                         return -EAGAIN;
394                 return cxgb_ulp_iscsi_ctl(adapter, req, data);
395         case RDMA_GET_PARAMS:
396         case RDMA_CQ_OP:
397         case RDMA_CQ_SETUP:
398         case RDMA_CQ_DISABLE:
399         case RDMA_CTRL_QP_SETUP:
400         case RDMA_GET_MEM:
401         case RDMA_GET_MIB:
402                 if (!offload_running(adapter))
403                         return -EAGAIN;
404                 return cxgb_rdma_ctl(adapter, req, data);
405         case GET_RX_PAGE_INFO:
406                 rx_page_info = data;
407                 rx_page_info->page_size = tp->rx_pg_size;
408                 rx_page_info->num = tp->rx_num_pgs;
409                 break;
410         default:
411                 return -EOPNOTSUPP;
412         }
413         return 0;
414 }
415
416 /*
417  * Dummy handler for Rx offload packets in case we get an offload packet before
418  * proper processing is setup.  This complains and drops the packet as it isn't
419  * normal to get offload packets at this stage.
420  */
421 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
422                                 int n)
423 {
424         while (n--)
425                 dev_kfree_skb_any(skbs[n]);
426         return 0;
427 }
428
429 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
430 {
431 }
432
433 void cxgb3_set_dummy_ops(struct t3cdev *dev)
434 {
435         dev->recv = rx_offload_blackhole;
436         dev->neigh_update = dummy_neigh_update;
437 }
438
439 /*
440  * Free an active-open TID.
441  */
442 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
443 {
444         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
445         union active_open_entry *p = atid2entry(t, atid);
446         void *ctx = p->t3c_tid.ctx;
447
448         spin_lock_bh(&t->atid_lock);
449         p->next = t->afree;
450         t->afree = p;
451         t->atids_in_use--;
452         spin_unlock_bh(&t->atid_lock);
453
454         return ctx;
455 }
456
457 EXPORT_SYMBOL(cxgb3_free_atid);
458
459 /*
460  * Free a server TID and return it to the free pool.
461  */
462 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
463 {
464         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
465         union listen_entry *p = stid2entry(t, stid);
466
467         spin_lock_bh(&t->stid_lock);
468         p->next = t->sfree;
469         t->sfree = p;
470         t->stids_in_use--;
471         spin_unlock_bh(&t->stid_lock);
472 }
473
474 EXPORT_SYMBOL(cxgb3_free_stid);
475
476 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
477                       void *ctx, unsigned int tid)
478 {
479         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
480
481         t->tid_tab[tid].client = client;
482         t->tid_tab[tid].ctx = ctx;
483         atomic_inc(&t->tids_in_use);
484 }
485
486 EXPORT_SYMBOL(cxgb3_insert_tid);
487
488 /*
489  * Populate a TID_RELEASE WR.  The skb must be already propely sized.
490  */
491 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
492 {
493         struct cpl_tid_release *req;
494
495         skb->priority = CPL_PRIORITY_SETUP;
496         req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
497         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
498         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
499 }
500
501 static void t3_process_tid_release_list(struct work_struct *work)
502 {
503         struct t3c_data *td = container_of(work, struct t3c_data,
504                                            tid_release_task);
505         struct sk_buff *skb;
506         struct t3cdev *tdev = td->dev;
507
508
509         spin_lock_bh(&td->tid_release_lock);
510         while (td->tid_release_list) {
511                 struct t3c_tid_entry *p = td->tid_release_list;
512
513                 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
514                 spin_unlock_bh(&td->tid_release_lock);
515
516                 skb = alloc_skb(sizeof(struct cpl_tid_release),
517                                 GFP_KERNEL | __GFP_NOFAIL);
518                 mk_tid_release(skb, p - td->tid_maps.tid_tab);
519                 cxgb3_ofld_send(tdev, skb);
520                 p->ctx = NULL;
521                 spin_lock_bh(&td->tid_release_lock);
522         }
523         spin_unlock_bh(&td->tid_release_lock);
524 }
525
526 /* use ctx as a next pointer in the tid release list */
527 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
528 {
529         struct t3c_data *td = T3C_DATA(tdev);
530         struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
531
532         spin_lock_bh(&td->tid_release_lock);
533         p->ctx = (void *)td->tid_release_list;
534         p->client = NULL;
535         td->tid_release_list = p;
536         if (!p->ctx)
537                 schedule_work(&td->tid_release_task);
538         spin_unlock_bh(&td->tid_release_lock);
539 }
540
541 EXPORT_SYMBOL(cxgb3_queue_tid_release);
542
543 /*
544  * Remove a tid from the TID table.  A client may defer processing its last
545  * CPL message if it is locked at the time it arrives, and while the message
546  * sits in the client's backlog the TID may be reused for another connection.
547  * To handle this we atomically switch the TID association if it still points
548  * to the original client context.
549  */
550 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
551 {
552         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
553
554         BUG_ON(tid >= t->ntids);
555         if (tdev->type == T3A)
556                 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
557         else {
558                 struct sk_buff *skb;
559
560                 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
561                 if (likely(skb)) {
562                         mk_tid_release(skb, tid);
563                         cxgb3_ofld_send(tdev, skb);
564                         t->tid_tab[tid].ctx = NULL;
565                 } else
566                         cxgb3_queue_tid_release(tdev, tid);
567         }
568         atomic_dec(&t->tids_in_use);
569 }
570
571 EXPORT_SYMBOL(cxgb3_remove_tid);
572
573 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
574                      void *ctx)
575 {
576         int atid = -1;
577         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
578
579         spin_lock_bh(&t->atid_lock);
580         if (t->afree &&
581             t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
582             t->ntids) {
583                 union active_open_entry *p = t->afree;
584
585                 atid = (p - t->atid_tab) + t->atid_base;
586                 t->afree = p->next;
587                 p->t3c_tid.ctx = ctx;
588                 p->t3c_tid.client = client;
589                 t->atids_in_use++;
590         }
591         spin_unlock_bh(&t->atid_lock);
592         return atid;
593 }
594
595 EXPORT_SYMBOL(cxgb3_alloc_atid);
596
597 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
598                      void *ctx)
599 {
600         int stid = -1;
601         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
602
603         spin_lock_bh(&t->stid_lock);
604         if (t->sfree) {
605                 union listen_entry *p = t->sfree;
606
607                 stid = (p - t->stid_tab) + t->stid_base;
608                 t->sfree = p->next;
609                 p->t3c_tid.ctx = ctx;
610                 p->t3c_tid.client = client;
611                 t->stids_in_use++;
612         }
613         spin_unlock_bh(&t->stid_lock);
614         return stid;
615 }
616
617 EXPORT_SYMBOL(cxgb3_alloc_stid);
618
619 /* Get the t3cdev associated with a net_device */
620 struct t3cdev *dev2t3cdev(struct net_device *dev)
621 {
622         const struct port_info *pi = netdev_priv(dev);
623
624         return (struct t3cdev *)pi->adapter;
625 }
626
627 EXPORT_SYMBOL(dev2t3cdev);
628
629 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
630 {
631         struct cpl_smt_write_rpl *rpl = cplhdr(skb);
632
633         if (rpl->status != CPL_ERR_NONE)
634                 printk(KERN_ERR
635                        "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
636                        rpl->status, GET_TID(rpl));
637
638         return CPL_RET_BUF_DONE;
639 }
640
641 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
642 {
643         struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
644
645         if (rpl->status != CPL_ERR_NONE)
646                 printk(KERN_ERR
647                        "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
648                        rpl->status, GET_TID(rpl));
649
650         return CPL_RET_BUF_DONE;
651 }
652
653 static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
654 {
655         struct cpl_rte_write_rpl *rpl = cplhdr(skb);
656
657         if (rpl->status != CPL_ERR_NONE)
658                 printk(KERN_ERR
659                        "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
660                        rpl->status, GET_TID(rpl));
661
662         return CPL_RET_BUF_DONE;
663 }
664
665 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
666 {
667         struct cpl_act_open_rpl *rpl = cplhdr(skb);
668         unsigned int atid = G_TID(ntohl(rpl->atid));
669         struct t3c_tid_entry *t3c_tid;
670
671         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
672         if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
673             t3c_tid->client->handlers &&
674             t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
675                 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
676                                                                     t3c_tid->
677                                                                     ctx);
678         } else {
679                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
680                        dev->name, CPL_ACT_OPEN_RPL);
681                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
682         }
683 }
684
685 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
686 {
687         union opcode_tid *p = cplhdr(skb);
688         unsigned int stid = G_TID(ntohl(p->opcode_tid));
689         struct t3c_tid_entry *t3c_tid;
690
691         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
692         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
693             t3c_tid->client->handlers[p->opcode]) {
694                 return t3c_tid->client->handlers[p->opcode] (dev, skb,
695                                                              t3c_tid->ctx);
696         } else {
697                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
698                        dev->name, p->opcode);
699                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
700         }
701 }
702
703 static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
704 {
705         union opcode_tid *p = cplhdr(skb);
706         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
707         struct t3c_tid_entry *t3c_tid;
708
709         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
710         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
711             t3c_tid->client->handlers[p->opcode]) {
712                 return t3c_tid->client->handlers[p->opcode]
713                     (dev, skb, t3c_tid->ctx);
714         } else {
715                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
716                        dev->name, p->opcode);
717                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
718         }
719 }
720
721 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
722 {
723         struct cpl_pass_accept_req *req = cplhdr(skb);
724         unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
725         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
726         struct t3c_tid_entry *t3c_tid;
727         unsigned int tid = GET_TID(req);
728
729         if (unlikely(tid >= t->ntids)) {
730                 printk("%s: passive open TID %u too large\n",
731                        dev->name, tid);
732                 t3_fatal_err(tdev2adap(dev));
733                 return CPL_RET_BUF_DONE;
734         }
735
736         t3c_tid = lookup_stid(t, stid);
737         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
738             t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
739                 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
740                     (dev, skb, t3c_tid->ctx);
741         } else {
742                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
743                        dev->name, CPL_PASS_ACCEPT_REQ);
744                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
745         }
746 }
747
748 /*
749  * Returns an sk_buff for a reply CPL message of size len.  If the input
750  * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
751  * is allocated.  The input skb must be of size at least len.  Note that this
752  * operation does not destroy the original skb data even if it decides to reuse
753  * the buffer.
754  */
755 static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
756                                                gfp_t gfp)
757 {
758         if (likely(!skb_cloned(skb))) {
759                 BUG_ON(skb->len < len);
760                 __skb_trim(skb, len);
761                 skb_get(skb);
762         } else {
763                 skb = alloc_skb(len, gfp);
764                 if (skb)
765                         __skb_put(skb, len);
766         }
767         return skb;
768 }
769
770 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
771 {
772         union opcode_tid *p = cplhdr(skb);
773         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
774         struct t3c_tid_entry *t3c_tid;
775
776         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
777         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
778             t3c_tid->client->handlers[p->opcode]) {
779                 return t3c_tid->client->handlers[p->opcode]
780                     (dev, skb, t3c_tid->ctx);
781         } else {
782                 struct cpl_abort_req_rss *req = cplhdr(skb);
783                 struct cpl_abort_rpl *rpl;
784                 struct sk_buff *reply_skb;
785                 unsigned int tid = GET_TID(req);
786                 u8 cmd = req->status;
787
788                 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
789                     req->status == CPL_ERR_PERSIST_NEG_ADVICE)
790                         goto out;
791
792                 reply_skb = cxgb3_get_cpl_reply_skb(skb,
793                                                     sizeof(struct
794                                                            cpl_abort_rpl),
795                                                     GFP_ATOMIC);
796
797                 if (!reply_skb) {
798                         printk("do_abort_req_rss: couldn't get skb!\n");
799                         goto out;
800                 }
801                 reply_skb->priority = CPL_PRIORITY_DATA;
802                 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
803                 rpl = cplhdr(reply_skb);
804                 rpl->wr.wr_hi =
805                     htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
806                 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
807                 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
808                 rpl->cmd = cmd;
809                 cxgb3_ofld_send(dev, reply_skb);
810 out:
811                 return CPL_RET_BUF_DONE;
812         }
813 }
814
815 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
816 {
817         struct cpl_act_establish *req = cplhdr(skb);
818         unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
819         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
820         struct t3c_tid_entry *t3c_tid;
821         unsigned int tid = GET_TID(req);
822
823         if (unlikely(tid >= t->ntids)) {
824                 printk("%s: active establish TID %u too large\n",
825                        dev->name, tid);
826                 t3_fatal_err(tdev2adap(dev));
827                 return CPL_RET_BUF_DONE;
828         }
829
830         t3c_tid = lookup_atid(t, atid);
831         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
832             t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
833                 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
834                     (dev, skb, t3c_tid->ctx);
835         } else {
836                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
837                        dev->name, CPL_ACT_ESTABLISH);
838                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
839         }
840 }
841
842 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
843 {
844         struct cpl_trace_pkt *p = cplhdr(skb);
845
846         skb->protocol = htons(0xffff);
847         skb->dev = dev->lldev;
848         skb_pull(skb, sizeof(*p));
849         skb_reset_mac_header(skb);
850         netif_receive_skb(skb);
851         return 0;
852 }
853
854 /*
855  * That skb would better have come from process_responses() where we abuse
856  * ->priority and ->csum to carry our data.  NB: if we get to per-arch
857  * ->csum, the things might get really interesting here.
858  */
859
860 static inline u32 get_hwtid(struct sk_buff *skb)
861 {
862         return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
863 }
864
865 static inline u32 get_opcode(struct sk_buff *skb)
866 {
867         return G_OPCODE(ntohl((__force __be32)skb->csum));
868 }
869
870 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
871 {
872         unsigned int hwtid = get_hwtid(skb);
873         unsigned int opcode = get_opcode(skb);
874         struct t3c_tid_entry *t3c_tid;
875
876         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
877         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
878             t3c_tid->client->handlers[opcode]) {
879                 return t3c_tid->client->handlers[opcode] (dev, skb,
880                                                           t3c_tid->ctx);
881         } else {
882                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
883                        dev->name, opcode);
884                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
885         }
886 }
887
888 static int nb_callback(struct notifier_block *self, unsigned long event,
889                        void *ctx)
890 {
891         switch (event) {
892         case (NETEVENT_NEIGH_UPDATE):{
893                 cxgb_neigh_update((struct neighbour *)ctx);
894                 break;
895         }
896         case (NETEVENT_PMTU_UPDATE):
897                 break;
898         case (NETEVENT_REDIRECT):{
899                 struct netevent_redirect *nr = ctx;
900                 cxgb_redirect(nr->old, nr->new);
901                 cxgb_neigh_update(nr->new->neighbour);
902                 break;
903         }
904         default:
905                 break;
906         }
907         return 0;
908 }
909
910 static struct notifier_block nb = {
911         .notifier_call = nb_callback
912 };
913
914 /*
915  * Process a received packet with an unknown/unexpected CPL opcode.
916  */
917 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
918 {
919         printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
920                *skb->data);
921         return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
922 }
923
924 /*
925  * Handlers for each CPL opcode
926  */
927 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
928
929 /*
930  * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
931  * to unregister an existing handler.
932  */
933 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
934 {
935         if (opcode < NUM_CPL_CMDS)
936                 cpl_handlers[opcode] = h ? h : do_bad_cpl;
937         else
938                 printk(KERN_ERR "T3C: handler registration for "
939                        "opcode %x failed\n", opcode);
940 }
941
942 EXPORT_SYMBOL(t3_register_cpl_handler);
943
944 /*
945  * T3CDEV's receive method.
946  */
947 int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
948 {
949         while (n--) {
950                 struct sk_buff *skb = *skbs++;
951                 unsigned int opcode = get_opcode(skb);
952                 int ret = cpl_handlers[opcode] (dev, skb);
953
954 #if VALIDATE_TID
955                 if (ret & CPL_RET_UNKNOWN_TID) {
956                         union opcode_tid *p = cplhdr(skb);
957
958                         printk(KERN_ERR "%s: CPL message (opcode %u) had "
959                                "unknown TID %u\n", dev->name, opcode,
960                                G_TID(ntohl(p->opcode_tid)));
961                 }
962 #endif
963                 if (ret & CPL_RET_BUF_DONE)
964                         kfree_skb(skb);
965         }
966         return 0;
967 }
968
969 /*
970  * Sends an sk_buff to a T3C driver after dealing with any active network taps.
971  */
972 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
973 {
974         int r;
975
976         local_bh_disable();
977         r = dev->send(dev, skb);
978         local_bh_enable();
979         return r;
980 }
981
982 EXPORT_SYMBOL(cxgb3_ofld_send);
983
984 static int is_offloading(struct net_device *dev)
985 {
986         struct adapter *adapter;
987         int i;
988
989         read_lock_bh(&adapter_list_lock);
990         list_for_each_entry(adapter, &adapter_list, adapter_list) {
991                 for_each_port(adapter, i) {
992                         if (dev == adapter->port[i]) {
993                                 read_unlock_bh(&adapter_list_lock);
994                                 return 1;
995                         }
996                 }
997         }
998         read_unlock_bh(&adapter_list_lock);
999         return 0;
1000 }
1001
1002 void cxgb_neigh_update(struct neighbour *neigh)
1003 {
1004         struct net_device *dev = neigh->dev;
1005
1006         if (dev && (is_offloading(dev))) {
1007                 struct t3cdev *tdev = dev2t3cdev(dev);
1008
1009                 BUG_ON(!tdev);
1010                 t3_l2t_update(tdev, neigh);
1011         }
1012 }
1013
1014 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
1015 {
1016         struct sk_buff *skb;
1017         struct cpl_set_tcb_field *req;
1018
1019         skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
1020         if (!skb) {
1021                 printk(KERN_ERR "%s: cannot allocate skb!\n", __func__);
1022                 return;
1023         }
1024         skb->priority = CPL_PRIORITY_CONTROL;
1025         req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
1026         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1027         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1028         req->reply = 0;
1029         req->cpu_idx = 0;
1030         req->word = htons(W_TCB_L2T_IX);
1031         req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
1032         req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
1033         tdev->send(tdev, skb);
1034 }
1035
1036 void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
1037 {
1038         struct net_device *olddev, *newdev;
1039         struct tid_info *ti;
1040         struct t3cdev *tdev;
1041         u32 tid;
1042         int update_tcb;
1043         struct l2t_entry *e;
1044         struct t3c_tid_entry *te;
1045
1046         olddev = old->neighbour->dev;
1047         newdev = new->neighbour->dev;
1048         if (!is_offloading(olddev))
1049                 return;
1050         if (!is_offloading(newdev)) {
1051                 printk(KERN_WARNING "%s: Redirect to non-offload "
1052                        "device ignored.\n", __func__);
1053                 return;
1054         }
1055         tdev = dev2t3cdev(olddev);
1056         BUG_ON(!tdev);
1057         if (tdev != dev2t3cdev(newdev)) {
1058                 printk(KERN_WARNING "%s: Redirect to different "
1059                        "offload device ignored.\n", __func__);
1060                 return;
1061         }
1062
1063         /* Add new L2T entry */
1064         e = t3_l2t_get(tdev, new->neighbour, newdev);
1065         if (!e) {
1066                 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
1067                        __func__);
1068                 return;
1069         }
1070
1071         /* Walk tid table and notify clients of dst change. */
1072         ti = &(T3C_DATA(tdev))->tid_maps;
1073         for (tid = 0; tid < ti->ntids; tid++) {
1074                 te = lookup_tid(ti, tid);
1075                 BUG_ON(!te);
1076                 if (te && te->ctx && te->client && te->client->redirect) {
1077                         update_tcb = te->client->redirect(te->ctx, old, new, e);
1078                         if (update_tcb) {
1079                                 l2t_hold(L2DATA(tdev), e);
1080                                 set_l2t_ix(tdev, tid, e);
1081                         }
1082                 }
1083         }
1084         l2t_release(L2DATA(tdev), e);
1085 }
1086
1087 /*
1088  * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1089  * The allocated memory is cleared.
1090  */
1091 void *cxgb_alloc_mem(unsigned long size)
1092 {
1093         void *p = kmalloc(size, GFP_KERNEL);
1094
1095         if (!p)
1096                 p = vmalloc(size);
1097         if (p)
1098                 memset(p, 0, size);
1099         return p;
1100 }
1101
1102 /*
1103  * Free memory allocated through t3_alloc_mem().
1104  */
1105 void cxgb_free_mem(void *addr)
1106 {
1107         if (is_vmalloc_addr(addr))
1108                 vfree(addr);
1109         else
1110                 kfree(addr);
1111 }
1112
1113 /*
1114  * Allocate and initialize the TID tables.  Returns 0 on success.
1115  */
1116 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1117                          unsigned int natids, unsigned int nstids,
1118                          unsigned int atid_base, unsigned int stid_base)
1119 {
1120         unsigned long size = ntids * sizeof(*t->tid_tab) +
1121             natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1122
1123         t->tid_tab = cxgb_alloc_mem(size);
1124         if (!t->tid_tab)
1125                 return -ENOMEM;
1126
1127         t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1128         t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1129         t->ntids = ntids;
1130         t->nstids = nstids;
1131         t->stid_base = stid_base;
1132         t->sfree = NULL;
1133         t->natids = natids;
1134         t->atid_base = atid_base;
1135         t->afree = NULL;
1136         t->stids_in_use = t->atids_in_use = 0;
1137         atomic_set(&t->tids_in_use, 0);
1138         spin_lock_init(&t->stid_lock);
1139         spin_lock_init(&t->atid_lock);
1140
1141         /*
1142          * Setup the free lists for stid_tab and atid_tab.
1143          */
1144         if (nstids) {
1145                 while (--nstids)
1146                         t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1147                 t->sfree = t->stid_tab;
1148         }
1149         if (natids) {
1150                 while (--natids)
1151                         t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1152                 t->afree = t->atid_tab;
1153         }
1154         return 0;
1155 }
1156
1157 static void free_tid_maps(struct tid_info *t)
1158 {
1159         cxgb_free_mem(t->tid_tab);
1160 }
1161
1162 static inline void add_adapter(struct adapter *adap)
1163 {
1164         write_lock_bh(&adapter_list_lock);
1165         list_add_tail(&adap->adapter_list, &adapter_list);
1166         write_unlock_bh(&adapter_list_lock);
1167 }
1168
1169 static inline void remove_adapter(struct adapter *adap)
1170 {
1171         write_lock_bh(&adapter_list_lock);
1172         list_del(&adap->adapter_list);
1173         write_unlock_bh(&adapter_list_lock);
1174 }
1175
1176 int cxgb3_offload_activate(struct adapter *adapter)
1177 {
1178         struct t3cdev *dev = &adapter->tdev;
1179         int natids, err;
1180         struct t3c_data *t;
1181         struct tid_range stid_range, tid_range;
1182         struct mtutab mtutab;
1183         unsigned int l2t_capacity;
1184
1185         t = kcalloc(1, sizeof(*t), GFP_KERNEL);
1186         if (!t)
1187                 return -ENOMEM;
1188
1189         err = -EOPNOTSUPP;
1190         if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1191             dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1192             dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1193             dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1194             dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1195             dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1196                 goto out_free;
1197
1198         err = -ENOMEM;
1199         L2DATA(dev) = t3_init_l2t(l2t_capacity);
1200         if (!L2DATA(dev))
1201                 goto out_free;
1202
1203         natids = min(tid_range.num / 2, MAX_ATIDS);
1204         err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1205                             stid_range.num, ATID_BASE, stid_range.base);
1206         if (err)
1207                 goto out_free_l2t;
1208
1209         t->mtus = mtutab.mtus;
1210         t->nmtus = mtutab.size;
1211
1212         INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1213         spin_lock_init(&t->tid_release_lock);
1214         INIT_LIST_HEAD(&t->list_node);
1215         t->dev = dev;
1216
1217         T3C_DATA(dev) = t;
1218         dev->recv = process_rx;
1219         dev->neigh_update = t3_l2t_update;
1220
1221         /* Register netevent handler once */
1222         if (list_empty(&adapter_list))
1223                 register_netevent_notifier(&nb);
1224
1225         add_adapter(adapter);
1226         return 0;
1227
1228 out_free_l2t:
1229         t3_free_l2t(L2DATA(dev));
1230         L2DATA(dev) = NULL;
1231 out_free:
1232         kfree(t);
1233         return err;
1234 }
1235
1236 void cxgb3_offload_deactivate(struct adapter *adapter)
1237 {
1238         struct t3cdev *tdev = &adapter->tdev;
1239         struct t3c_data *t = T3C_DATA(tdev);
1240
1241         remove_adapter(adapter);
1242         if (list_empty(&adapter_list))
1243                 unregister_netevent_notifier(&nb);
1244
1245         free_tid_maps(&t->tid_maps);
1246         T3C_DATA(tdev) = NULL;
1247         t3_free_l2t(L2DATA(tdev));
1248         L2DATA(tdev) = NULL;
1249         kfree(t);
1250 }
1251
1252 static inline void register_tdev(struct t3cdev *tdev)
1253 {
1254         static int unit;
1255
1256         mutex_lock(&cxgb3_db_lock);
1257         snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1258         list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1259         mutex_unlock(&cxgb3_db_lock);
1260 }
1261
1262 static inline void unregister_tdev(struct t3cdev *tdev)
1263 {
1264         mutex_lock(&cxgb3_db_lock);
1265         list_del(&tdev->ofld_dev_list);
1266         mutex_unlock(&cxgb3_db_lock);
1267 }
1268
1269 static inline int adap2type(struct adapter *adapter)
1270 {
1271         int type = 0;
1272
1273         switch (adapter->params.rev) {
1274         case T3_REV_A:
1275                 type = T3A;
1276                 break;
1277         case T3_REV_B:
1278         case T3_REV_B2:
1279                 type = T3B;
1280                 break;
1281         case T3_REV_C:
1282                 type = T3C;
1283                 break;
1284         }
1285         return type;
1286 }
1287
1288 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1289 {
1290         struct t3cdev *tdev = &adapter->tdev;
1291
1292         INIT_LIST_HEAD(&tdev->ofld_dev_list);
1293
1294         cxgb3_set_dummy_ops(tdev);
1295         tdev->send = t3_offload_tx;
1296         tdev->ctl = cxgb_offload_ctl;
1297         tdev->type = adap2type(adapter);
1298
1299         register_tdev(tdev);
1300 }
1301
1302 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1303 {
1304         struct t3cdev *tdev = &adapter->tdev;
1305
1306         tdev->recv = NULL;
1307         tdev->neigh_update = NULL;
1308
1309         unregister_tdev(tdev);
1310 }
1311
1312 void __init cxgb3_offload_init(void)
1313 {
1314         int i;
1315
1316         for (i = 0; i < NUM_CPL_CMDS; ++i)
1317                 cpl_handlers[i] = do_bad_cpl;
1318
1319         t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1320         t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1321         t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
1322         t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1323         t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1324         t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1325         t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1326         t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1327         t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1328         t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1329         t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1330         t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1331         t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1332         t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1333         t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1334         t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1335         t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1336         t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1337         t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1338         t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1339         t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1340         t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1341         t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1342         t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1343         t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1344         t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1345 }