Add support for the latest 1G/10G Chelsio adapter, T3.
[linux-2.6.git] / drivers / net / cxgb3 / cxgb3_offload.c
1 /*
2  * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
3  * Copyright (c) 2006 Open Grid Computing, Inc. All rights reserved.
4  *
5  * This software is available to you under a choice of one of two
6  * licenses.  You may choose to be licensed under the terms of the GNU
7  * General Public License (GPL) Version 2, available from the file
8  * COPYING in the main directory of this source tree, or the
9  * OpenIB.org BSD license below:
10  *
11  *     Redistribution and use in source and binary forms, with or
12  *     without modification, are permitted provided that the following
13  *     conditions are met:
14  *
15  *      - Redistributions of source code must retain the above
16  *        copyright notice, this list of conditions and the following
17  *        disclaimer.
18  *
19  *      - Redistributions in binary form must reproduce the above
20  *        copyright notice, this list of conditions and the following
21  *        disclaimer in the documentation and/or other materials
22  *        provided with the distribution.
23  *
24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31  * SOFTWARE.
32  */
33
34 #include <linux/list.h>
35 #include <net/neighbour.h>
36 #include <linux/notifier.h>
37 #include <asm/atomic.h>
38 #include <linux/proc_fs.h>
39 #include <linux/if_vlan.h>
40 #include <net/netevent.h>
41 #include <linux/highmem.h>
42 #include <linux/vmalloc.h>
43
44 #include "common.h"
45 #include "regs.h"
46 #include "cxgb3_ioctl.h"
47 #include "cxgb3_ctl_defs.h"
48 #include "cxgb3_defs.h"
49 #include "l2t.h"
50 #include "firmware_exports.h"
51 #include "cxgb3_offload.h"
52
53 static LIST_HEAD(client_list);
54 static LIST_HEAD(ofld_dev_list);
55 static DEFINE_MUTEX(cxgb3_db_lock);
56
57 static DEFINE_RWLOCK(adapter_list_lock);
58 static LIST_HEAD(adapter_list);
59
60 static const unsigned int MAX_ATIDS = 64 * 1024;
61 static const unsigned int ATID_BASE = 0x100000;
62
63 static inline int offload_activated(struct t3cdev *tdev)
64 {
65         const struct adapter *adapter = tdev2adap(tdev);
66
67         return (test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map));
68 }
69
70 /**
71  *      cxgb3_register_client - register an offload client
72  *      @client: the client
73  *
74  *      Add the client to the client list,
75  *      and call backs the client for each activated offload device
76  */
77 void cxgb3_register_client(struct cxgb3_client *client)
78 {
79         struct t3cdev *tdev;
80
81         mutex_lock(&cxgb3_db_lock);
82         list_add_tail(&client->client_list, &client_list);
83
84         if (client->add) {
85                 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
86                         if (offload_activated(tdev))
87                                 client->add(tdev);
88                 }
89         }
90         mutex_unlock(&cxgb3_db_lock);
91 }
92
93 EXPORT_SYMBOL(cxgb3_register_client);
94
95 /**
96  *      cxgb3_unregister_client - unregister an offload client
97  *      @client: the client
98  *
99  *      Remove the client to the client list,
100  *      and call backs the client for each activated offload device.
101  */
102 void cxgb3_unregister_client(struct cxgb3_client *client)
103 {
104         struct t3cdev *tdev;
105
106         mutex_lock(&cxgb3_db_lock);
107         list_del(&client->client_list);
108
109         if (client->remove) {
110                 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
111                         if (offload_activated(tdev))
112                                 client->remove(tdev);
113                 }
114         }
115         mutex_unlock(&cxgb3_db_lock);
116 }
117
118 EXPORT_SYMBOL(cxgb3_unregister_client);
119
120 /**
121  *      cxgb3_add_clients - activate registered clients for an offload device
122  *      @tdev: the offload device
123  *
124  *      Call backs all registered clients once a offload device is activated
125  */
126 void cxgb3_add_clients(struct t3cdev *tdev)
127 {
128         struct cxgb3_client *client;
129
130         mutex_lock(&cxgb3_db_lock);
131         list_for_each_entry(client, &client_list, client_list) {
132                 if (client->add)
133                         client->add(tdev);
134         }
135         mutex_unlock(&cxgb3_db_lock);
136 }
137
138 /**
139  *      cxgb3_remove_clients - deactivates registered clients
140  *                             for an offload device
141  *      @tdev: the offload device
142  *
143  *      Call backs all registered clients once a offload device is deactivated
144  */
145 void cxgb3_remove_clients(struct t3cdev *tdev)
146 {
147         struct cxgb3_client *client;
148
149         mutex_lock(&cxgb3_db_lock);
150         list_for_each_entry(client, &client_list, client_list) {
151                 if (client->remove)
152                         client->remove(tdev);
153         }
154         mutex_unlock(&cxgb3_db_lock);
155 }
156
157 static struct net_device *get_iff_from_mac(struct adapter *adapter,
158                                            const unsigned char *mac,
159                                            unsigned int vlan)
160 {
161         int i;
162
163         for_each_port(adapter, i) {
164                 const struct vlan_group *grp;
165                 struct net_device *dev = adapter->port[i];
166                 const struct port_info *p = netdev_priv(dev);
167
168                 if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) {
169                         if (vlan && vlan != VLAN_VID_MASK) {
170                                 grp = p->vlan_grp;
171                                 dev = grp ? grp->vlan_devices[vlan] : NULL;
172                         } else
173                                 while (dev->master)
174                                         dev = dev->master;
175                         return dev;
176                 }
177         }
178         return NULL;
179 }
180
181 static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
182                               void *data)
183 {
184         int ret = 0;
185         struct ulp_iscsi_info *uiip = data;
186
187         switch (req) {
188         case ULP_ISCSI_GET_PARAMS:
189                 uiip->pdev = adapter->pdev;
190                 uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
191                 uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
192                 uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
193                 /*
194                  * On tx, the iscsi pdu has to be <= tx page size and has to
195                  * fit into the Tx PM FIFO.
196                  */
197                 uiip->max_txsz = min(adapter->params.tp.tx_pg_size,
198                                      t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
199                 /* on rx, the iscsi pdu has to be < rx page size and the
200                    whole pdu + cpl headers has to fit into one sge buffer */
201                 uiip->max_rxsz = min_t(unsigned int,
202                                        adapter->params.tp.rx_pg_size,
203                                        (adapter->sge.qs[0].fl[1].buf_size -
204                                         sizeof(struct cpl_rx_data) * 2 -
205                                         sizeof(struct cpl_rx_data_ddp)));
206                 break;
207         case ULP_ISCSI_SET_PARAMS:
208                 t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
209                 break;
210         default:
211                 ret = -EOPNOTSUPP;
212         }
213         return ret;
214 }
215
216 /* Response queue used for RDMA events. */
217 #define ASYNC_NOTIF_RSPQ 0
218
219 static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
220 {
221         int ret = 0;
222
223         switch (req) {
224         case RDMA_GET_PARAMS:{
225                 struct rdma_info *req = data;
226                 struct pci_dev *pdev = adapter->pdev;
227
228                 req->udbell_physbase = pci_resource_start(pdev, 2);
229                 req->udbell_len = pci_resource_len(pdev, 2);
230                 req->tpt_base =
231                         t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
232                 req->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
233                 req->pbl_base =
234                         t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
235                 req->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
236                 req->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
237                 req->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
238                 req->kdb_addr = adapter->regs + A_SG_KDOORBELL;
239                 req->pdev = pdev;
240                 break;
241         }
242         case RDMA_CQ_OP:{
243                 unsigned long flags;
244                 struct rdma_cq_op *req = data;
245
246                 /* may be called in any context */
247                 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
248                 ret = t3_sge_cqcntxt_op(adapter, req->id, req->op,
249                                         req->credits);
250                 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
251                 break;
252         }
253         case RDMA_GET_MEM:{
254                 struct ch_mem_range *t = data;
255                 struct mc7 *mem;
256
257                 if ((t->addr & 7) || (t->len & 7))
258                         return -EINVAL;
259                 if (t->mem_id == MEM_CM)
260                         mem = &adapter->cm;
261                 else if (t->mem_id == MEM_PMRX)
262                         mem = &adapter->pmrx;
263                 else if (t->mem_id == MEM_PMTX)
264                         mem = &adapter->pmtx;
265                 else
266                         return -EINVAL;
267
268                 ret =
269                         t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
270                                         (u64 *) t->buf);
271                 if (ret)
272                         return ret;
273                 break;
274         }
275         case RDMA_CQ_SETUP:{
276                 struct rdma_cq_setup *req = data;
277
278                 spin_lock_irq(&adapter->sge.reg_lock);
279                 ret =
280                         t3_sge_init_cqcntxt(adapter, req->id,
281                                         req->base_addr, req->size,
282                                         ASYNC_NOTIF_RSPQ,
283                                         req->ovfl_mode, req->credits,
284                                         req->credit_thres);
285                 spin_unlock_irq(&adapter->sge.reg_lock);
286                 break;
287         }
288         case RDMA_CQ_DISABLE:
289                 spin_lock_irq(&adapter->sge.reg_lock);
290                 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
291                 spin_unlock_irq(&adapter->sge.reg_lock);
292                 break;
293         case RDMA_CTRL_QP_SETUP:{
294                 struct rdma_ctrlqp_setup *req = data;
295
296                 spin_lock_irq(&adapter->sge.reg_lock);
297                 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
298                                                 SGE_CNTXT_RDMA,
299                                                 ASYNC_NOTIF_RSPQ,
300                                                 req->base_addr, req->size,
301                                                 FW_RI_TID_START, 1, 0);
302                 spin_unlock_irq(&adapter->sge.reg_lock);
303                 break;
304         }
305         default:
306                 ret = -EOPNOTSUPP;
307         }
308         return ret;
309 }
310
311 static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
312 {
313         struct adapter *adapter = tdev2adap(tdev);
314         struct tid_range *tid;
315         struct mtutab *mtup;
316         struct iff_mac *iffmacp;
317         struct ddp_params *ddpp;
318         struct adap_ports *ports;
319         int i;
320
321         switch (req) {
322         case GET_MAX_OUTSTANDING_WR:
323                 *(unsigned int *)data = FW_WR_NUM;
324                 break;
325         case GET_WR_LEN:
326                 *(unsigned int *)data = WR_FLITS;
327                 break;
328         case GET_TX_MAX_CHUNK:
329                 *(unsigned int *)data = 1 << 20;        /* 1MB */
330                 break;
331         case GET_TID_RANGE:
332                 tid = data;
333                 tid->num = t3_mc5_size(&adapter->mc5) -
334                     adapter->params.mc5.nroutes -
335                     adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
336                 tid->base = 0;
337                 break;
338         case GET_STID_RANGE:
339                 tid = data;
340                 tid->num = adapter->params.mc5.nservers;
341                 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
342                     adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
343                 break;
344         case GET_L2T_CAPACITY:
345                 *(unsigned int *)data = 2048;
346                 break;
347         case GET_MTUS:
348                 mtup = data;
349                 mtup->size = NMTUS;
350                 mtup->mtus = adapter->params.mtus;
351                 break;
352         case GET_IFF_FROM_MAC:
353                 iffmacp = data;
354                 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
355                                                 iffmacp->vlan_tag &
356                                                 VLAN_VID_MASK);
357                 break;
358         case GET_DDP_PARAMS:
359                 ddpp = data;
360                 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
361                 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
362                 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
363                 break;
364         case GET_PORTS:
365                 ports = data;
366                 ports->nports = adapter->params.nports;
367                 for_each_port(adapter, i)
368                         ports->lldevs[i] = adapter->port[i];
369                 break;
370         case ULP_ISCSI_GET_PARAMS:
371         case ULP_ISCSI_SET_PARAMS:
372                 if (!offload_running(adapter))
373                         return -EAGAIN;
374                 return cxgb_ulp_iscsi_ctl(adapter, req, data);
375         case RDMA_GET_PARAMS:
376         case RDMA_CQ_OP:
377         case RDMA_CQ_SETUP:
378         case RDMA_CQ_DISABLE:
379         case RDMA_CTRL_QP_SETUP:
380         case RDMA_GET_MEM:
381                 if (!offload_running(adapter))
382                         return -EAGAIN;
383                 return cxgb_rdma_ctl(adapter, req, data);
384         default:
385                 return -EOPNOTSUPP;
386         }
387         return 0;
388 }
389
390 /*
391  * Dummy handler for Rx offload packets in case we get an offload packet before
392  * proper processing is setup.  This complains and drops the packet as it isn't
393  * normal to get offload packets at this stage.
394  */
395 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
396                                 int n)
397 {
398         CH_ERR(tdev2adap(dev), "%d unexpected offload packets, first data %u\n",
399                n, ntohl(*(u32 *)skbs[0]->data));
400         while (n--)
401                 dev_kfree_skb_any(skbs[n]);
402         return 0;
403 }
404
405 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
406 {
407 }
408
409 void cxgb3_set_dummy_ops(struct t3cdev *dev)
410 {
411         dev->recv = rx_offload_blackhole;
412         dev->neigh_update = dummy_neigh_update;
413 }
414
415 /*
416  * Free an active-open TID.
417  */
418 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
419 {
420         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
421         union active_open_entry *p = atid2entry(t, atid);
422         void *ctx = p->t3c_tid.ctx;
423
424         spin_lock_bh(&t->atid_lock);
425         p->next = t->afree;
426         t->afree = p;
427         t->atids_in_use--;
428         spin_unlock_bh(&t->atid_lock);
429
430         return ctx;
431 }
432
433 EXPORT_SYMBOL(cxgb3_free_atid);
434
435 /*
436  * Free a server TID and return it to the free pool.
437  */
438 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
439 {
440         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
441         union listen_entry *p = stid2entry(t, stid);
442
443         spin_lock_bh(&t->stid_lock);
444         p->next = t->sfree;
445         t->sfree = p;
446         t->stids_in_use--;
447         spin_unlock_bh(&t->stid_lock);
448 }
449
450 EXPORT_SYMBOL(cxgb3_free_stid);
451
452 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
453                       void *ctx, unsigned int tid)
454 {
455         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
456
457         t->tid_tab[tid].client = client;
458         t->tid_tab[tid].ctx = ctx;
459         atomic_inc(&t->tids_in_use);
460 }
461
462 EXPORT_SYMBOL(cxgb3_insert_tid);
463
464 /*
465  * Populate a TID_RELEASE WR.  The skb must be already propely sized.
466  */
467 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
468 {
469         struct cpl_tid_release *req;
470
471         skb->priority = CPL_PRIORITY_SETUP;
472         req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
473         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
474         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
475 }
476
477 static void t3_process_tid_release_list(struct work_struct *work)
478 {
479         struct t3c_data *td = container_of(work, struct t3c_data,
480                                            tid_release_task);
481         struct sk_buff *skb;
482         struct t3cdev *tdev = td->dev;
483         
484
485         spin_lock_bh(&td->tid_release_lock);
486         while (td->tid_release_list) {
487                 struct t3c_tid_entry *p = td->tid_release_list;
488
489                 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
490                 spin_unlock_bh(&td->tid_release_lock);
491
492                 skb = alloc_skb(sizeof(struct cpl_tid_release),
493                                 GFP_KERNEL | __GFP_NOFAIL);
494                 mk_tid_release(skb, p - td->tid_maps.tid_tab);
495                 cxgb3_ofld_send(tdev, skb);
496                 p->ctx = NULL;
497                 spin_lock_bh(&td->tid_release_lock);
498         }
499         spin_unlock_bh(&td->tid_release_lock);
500 }
501
502 /* use ctx as a next pointer in the tid release list */
503 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
504 {
505         struct t3c_data *td = T3C_DATA(tdev);
506         struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
507
508         spin_lock_bh(&td->tid_release_lock);
509         p->ctx = (void *)td->tid_release_list;
510         td->tid_release_list = p;
511         if (!p->ctx)
512                 schedule_work(&td->tid_release_task);
513         spin_unlock_bh(&td->tid_release_lock);
514 }
515
516 EXPORT_SYMBOL(cxgb3_queue_tid_release);
517
518 /*
519  * Remove a tid from the TID table.  A client may defer processing its last
520  * CPL message if it is locked at the time it arrives, and while the message
521  * sits in the client's backlog the TID may be reused for another connection.
522  * To handle this we atomically switch the TID association if it still points
523  * to the original client context.
524  */
525 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
526 {
527         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
528
529         BUG_ON(tid >= t->ntids);
530         if (tdev->type == T3A)
531                 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
532         else {
533                 struct sk_buff *skb;
534
535                 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
536                 if (likely(skb)) {
537                         mk_tid_release(skb, tid);
538                         cxgb3_ofld_send(tdev, skb);
539                         t->tid_tab[tid].ctx = NULL;
540                 } else
541                         cxgb3_queue_tid_release(tdev, tid);
542         }
543         atomic_dec(&t->tids_in_use);
544 }
545
546 EXPORT_SYMBOL(cxgb3_remove_tid);
547
548 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
549                      void *ctx)
550 {
551         int atid = -1;
552         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
553
554         spin_lock_bh(&t->atid_lock);
555         if (t->afree) {
556                 union active_open_entry *p = t->afree;
557
558                 atid = (p - t->atid_tab) + t->atid_base;
559                 t->afree = p->next;
560                 p->t3c_tid.ctx = ctx;
561                 p->t3c_tid.client = client;
562                 t->atids_in_use++;
563         }
564         spin_unlock_bh(&t->atid_lock);
565         return atid;
566 }
567
568 EXPORT_SYMBOL(cxgb3_alloc_atid);
569
570 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
571                      void *ctx)
572 {
573         int stid = -1;
574         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
575
576         spin_lock_bh(&t->stid_lock);
577         if (t->sfree) {
578                 union listen_entry *p = t->sfree;
579
580                 stid = (p - t->stid_tab) + t->stid_base;
581                 t->sfree = p->next;
582                 p->t3c_tid.ctx = ctx;
583                 p->t3c_tid.client = client;
584                 t->stids_in_use++;
585         }
586         spin_unlock_bh(&t->stid_lock);
587         return stid;
588 }
589
590 EXPORT_SYMBOL(cxgb3_alloc_stid);
591
592 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
593 {
594         struct cpl_smt_write_rpl *rpl = cplhdr(skb);
595
596         if (rpl->status != CPL_ERR_NONE)
597                 printk(KERN_ERR
598                        "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
599                        rpl->status, GET_TID(rpl));
600
601         return CPL_RET_BUF_DONE;
602 }
603
604 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
605 {
606         struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
607
608         if (rpl->status != CPL_ERR_NONE)
609                 printk(KERN_ERR
610                        "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
611                        rpl->status, GET_TID(rpl));
612
613         return CPL_RET_BUF_DONE;
614 }
615
616 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
617 {
618         struct cpl_act_open_rpl *rpl = cplhdr(skb);
619         unsigned int atid = G_TID(ntohl(rpl->atid));
620         struct t3c_tid_entry *t3c_tid;
621
622         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
623         if (t3c_tid->ctx && t3c_tid->client && t3c_tid->client->handlers &&
624             t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
625                 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
626                                                                     t3c_tid->
627                                                                     ctx);
628         } else {
629                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
630                        dev->name, CPL_ACT_OPEN_RPL);
631                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
632         }
633 }
634
635 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
636 {
637         union opcode_tid *p = cplhdr(skb);
638         unsigned int stid = G_TID(ntohl(p->opcode_tid));
639         struct t3c_tid_entry *t3c_tid;
640
641         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
642         if (t3c_tid->ctx && t3c_tid->client->handlers &&
643             t3c_tid->client->handlers[p->opcode]) {
644                 return t3c_tid->client->handlers[p->opcode] (dev, skb,
645                                                              t3c_tid->ctx);
646         } else {
647                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
648                        dev->name, p->opcode);
649                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
650         }
651 }
652
653 static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
654 {
655         union opcode_tid *p = cplhdr(skb);
656         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
657         struct t3c_tid_entry *t3c_tid;
658
659         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
660         if (t3c_tid->ctx && t3c_tid->client->handlers &&
661             t3c_tid->client->handlers[p->opcode]) {
662                 return t3c_tid->client->handlers[p->opcode]
663                     (dev, skb, t3c_tid->ctx);
664         } else {
665                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
666                        dev->name, p->opcode);
667                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
668         }
669 }
670
671 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
672 {
673         struct cpl_pass_accept_req *req = cplhdr(skb);
674         unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
675         struct t3c_tid_entry *t3c_tid;
676
677         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
678         if (t3c_tid->ctx && t3c_tid->client->handlers &&
679             t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
680                 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
681                     (dev, skb, t3c_tid->ctx);
682         } else {
683                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
684                        dev->name, CPL_PASS_ACCEPT_REQ);
685                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
686         }
687 }
688
689 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
690 {
691         union opcode_tid *p = cplhdr(skb);
692         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
693         struct t3c_tid_entry *t3c_tid;
694
695         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
696         if (t3c_tid->ctx && t3c_tid->client->handlers &&
697             t3c_tid->client->handlers[p->opcode]) {
698                 return t3c_tid->client->handlers[p->opcode]
699                     (dev, skb, t3c_tid->ctx);
700         } else {
701                 struct cpl_abort_req_rss *req = cplhdr(skb);
702                 struct cpl_abort_rpl *rpl;
703
704                 struct sk_buff *skb =
705                     alloc_skb(sizeof(struct cpl_abort_rpl), GFP_ATOMIC);
706                 if (!skb) {
707                         printk("do_abort_req_rss: couldn't get skb!\n");
708                         goto out;
709                 }
710                 skb->priority = CPL_PRIORITY_DATA;
711                 __skb_put(skb, sizeof(struct cpl_abort_rpl));
712                 rpl = cplhdr(skb);
713                 rpl->wr.wr_hi =
714                     htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
715                 rpl->wr.wr_lo = htonl(V_WR_TID(GET_TID(req)));
716                 OPCODE_TID(rpl) =
717                     htonl(MK_OPCODE_TID(CPL_ABORT_RPL, GET_TID(req)));
718                 rpl->cmd = req->status;
719                 cxgb3_ofld_send(dev, skb);
720 out:
721                 return CPL_RET_BUF_DONE;
722         }
723 }
724
725 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
726 {
727         struct cpl_act_establish *req = cplhdr(skb);
728         unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
729         struct t3c_tid_entry *t3c_tid;
730
731         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
732         if (t3c_tid->ctx && t3c_tid->client->handlers &&
733             t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
734                 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
735                     (dev, skb, t3c_tid->ctx);
736         } else {
737                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
738                        dev->name, CPL_PASS_ACCEPT_REQ);
739                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
740         }
741 }
742
743 static int do_set_tcb_rpl(struct t3cdev *dev, struct sk_buff *skb)
744 {
745         struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
746
747         if (rpl->status != CPL_ERR_NONE)
748                 printk(KERN_ERR
749                        "Unexpected SET_TCB_RPL status %u for tid %u\n",
750                        rpl->status, GET_TID(rpl));
751         return CPL_RET_BUF_DONE;
752 }
753
754 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
755 {
756         struct cpl_trace_pkt *p = cplhdr(skb);
757
758         skb->protocol = 0xffff;
759         skb->dev = dev->lldev;
760         skb_pull(skb, sizeof(*p));
761         skb->mac.raw = skb->data;
762         netif_receive_skb(skb);
763         return 0;
764 }
765
766 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
767 {
768         unsigned int hwtid = ntohl(skb->priority) >> 8 & 0xfffff;
769         unsigned int opcode = G_OPCODE(ntohl(skb->csum));
770         struct t3c_tid_entry *t3c_tid;
771
772         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
773         if (t3c_tid->ctx && t3c_tid->client->handlers &&
774             t3c_tid->client->handlers[opcode]) {
775                 return t3c_tid->client->handlers[opcode] (dev, skb,
776                                                           t3c_tid->ctx);
777         } else {
778                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
779                        dev->name, opcode);
780                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
781         }
782 }
783
784 static int nb_callback(struct notifier_block *self, unsigned long event,
785                        void *ctx)
786 {
787         switch (event) {
788         case (NETEVENT_NEIGH_UPDATE):{
789                 cxgb_neigh_update((struct neighbour *)ctx);
790                 break;
791         }
792         case (NETEVENT_PMTU_UPDATE):
793                 break;
794         case (NETEVENT_REDIRECT):{
795                 struct netevent_redirect *nr = ctx;
796                 cxgb_redirect(nr->old, nr->new);
797                 cxgb_neigh_update(nr->new->neighbour);
798                 break;
799         }
800         default:
801                 break;
802         }
803         return 0;
804 }
805
806 static struct notifier_block nb = {
807         .notifier_call = nb_callback
808 };
809
810 /*
811  * Process a received packet with an unknown/unexpected CPL opcode.
812  */
813 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
814 {
815         printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
816                *skb->data);
817         return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
818 }
819
820 /*
821  * Handlers for each CPL opcode
822  */
823 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
824
825 /*
826  * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
827  * to unregister an existing handler.
828  */
829 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
830 {
831         if (opcode < NUM_CPL_CMDS)
832                 cpl_handlers[opcode] = h ? h : do_bad_cpl;
833         else
834                 printk(KERN_ERR "T3C: handler registration for "
835                        "opcode %x failed\n", opcode);
836 }
837
838 EXPORT_SYMBOL(t3_register_cpl_handler);
839
840 /*
841  * T3CDEV's receive method.
842  */
843 int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
844 {
845         while (n--) {
846                 struct sk_buff *skb = *skbs++;
847                 unsigned int opcode = G_OPCODE(ntohl(skb->csum));
848                 int ret = cpl_handlers[opcode] (dev, skb);
849
850 #if VALIDATE_TID
851                 if (ret & CPL_RET_UNKNOWN_TID) {
852                         union opcode_tid *p = cplhdr(skb);
853
854                         printk(KERN_ERR "%s: CPL message (opcode %u) had "
855                                "unknown TID %u\n", dev->name, opcode,
856                                G_TID(ntohl(p->opcode_tid)));
857                 }
858 #endif
859                 if (ret & CPL_RET_BUF_DONE)
860                         kfree_skb(skb);
861         }
862         return 0;
863 }
864
865 /*
866  * Sends an sk_buff to a T3C driver after dealing with any active network taps.
867  */
868 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
869 {
870         int r;
871
872         local_bh_disable();
873         r = dev->send(dev, skb);
874         local_bh_enable();
875         return r;
876 }
877
878 EXPORT_SYMBOL(cxgb3_ofld_send);
879
880 static int is_offloading(struct net_device *dev)
881 {
882         struct adapter *adapter;
883         int i;
884
885         read_lock_bh(&adapter_list_lock);
886         list_for_each_entry(adapter, &adapter_list, adapter_list) {
887                 for_each_port(adapter, i) {
888                         if (dev == adapter->port[i]) {
889                                 read_unlock_bh(&adapter_list_lock);
890                                 return 1;
891                         }
892                 }
893         }
894         read_unlock_bh(&adapter_list_lock);
895         return 0;
896 }
897
898 void cxgb_neigh_update(struct neighbour *neigh)
899 {
900         struct net_device *dev = neigh->dev;
901
902         if (dev && (is_offloading(dev))) {
903                 struct t3cdev *tdev = T3CDEV(dev);
904
905                 BUG_ON(!tdev);
906                 t3_l2t_update(tdev, neigh);
907         }
908 }
909
910 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
911 {
912         struct sk_buff *skb;
913         struct cpl_set_tcb_field *req;
914
915         skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
916         if (!skb) {
917                 printk(KERN_ERR "%s: cannot allocate skb!\n", __FUNCTION__);
918                 return;
919         }
920         skb->priority = CPL_PRIORITY_CONTROL;
921         req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
922         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
923         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
924         req->reply = 0;
925         req->cpu_idx = 0;
926         req->word = htons(W_TCB_L2T_IX);
927         req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
928         req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
929         tdev->send(tdev, skb);
930 }
931
932 void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
933 {
934         struct net_device *olddev, *newdev;
935         struct tid_info *ti;
936         struct t3cdev *tdev;
937         u32 tid;
938         int update_tcb;
939         struct l2t_entry *e;
940         struct t3c_tid_entry *te;
941
942         olddev = old->neighbour->dev;
943         newdev = new->neighbour->dev;
944         if (!is_offloading(olddev))
945                 return;
946         if (!is_offloading(newdev)) {
947                 printk(KERN_WARNING "%s: Redirect to non-offload"
948                        "device ignored.\n", __FUNCTION__);
949                 return;
950         }
951         tdev = T3CDEV(olddev);
952         BUG_ON(!tdev);
953         if (tdev != T3CDEV(newdev)) {
954                 printk(KERN_WARNING "%s: Redirect to different "
955                        "offload device ignored.\n", __FUNCTION__);
956                 return;
957         }
958
959         /* Add new L2T entry */
960         e = t3_l2t_get(tdev, new->neighbour, newdev);
961         if (!e) {
962                 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
963                        __FUNCTION__);
964                 return;
965         }
966
967         /* Walk tid table and notify clients of dst change. */
968         ti = &(T3C_DATA(tdev))->tid_maps;
969         for (tid = 0; tid < ti->ntids; tid++) {
970                 te = lookup_tid(ti, tid);
971                 BUG_ON(!te);
972                 if (te->ctx && te->client && te->client->redirect) {
973                         update_tcb = te->client->redirect(te->ctx, old, new, e);
974                         if (update_tcb) {
975                                 l2t_hold(L2DATA(tdev), e);
976                                 set_l2t_ix(tdev, tid, e);
977                         }
978                 }
979         }
980         l2t_release(L2DATA(tdev), e);
981 }
982
983 /*
984  * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
985  * The allocated memory is cleared.
986  */
987 void *cxgb_alloc_mem(unsigned long size)
988 {
989         void *p = kmalloc(size, GFP_KERNEL);
990
991         if (!p)
992                 p = vmalloc(size);
993         if (p)
994                 memset(p, 0, size);
995         return p;
996 }
997
998 /*
999  * Free memory allocated through t3_alloc_mem().
1000  */
1001 void cxgb_free_mem(void *addr)
1002 {
1003         unsigned long p = (unsigned long)addr;
1004
1005         if (p >= VMALLOC_START && p < VMALLOC_END)
1006                 vfree(addr);
1007         else
1008                 kfree(addr);
1009 }
1010
1011 /*
1012  * Allocate and initialize the TID tables.  Returns 0 on success.
1013  */
1014 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1015                          unsigned int natids, unsigned int nstids,
1016                          unsigned int atid_base, unsigned int stid_base)
1017 {
1018         unsigned long size = ntids * sizeof(*t->tid_tab) +
1019             natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1020
1021         t->tid_tab = cxgb_alloc_mem(size);
1022         if (!t->tid_tab)
1023                 return -ENOMEM;
1024
1025         t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1026         t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1027         t->ntids = ntids;
1028         t->nstids = nstids;
1029         t->stid_base = stid_base;
1030         t->sfree = NULL;
1031         t->natids = natids;
1032         t->atid_base = atid_base;
1033         t->afree = NULL;
1034         t->stids_in_use = t->atids_in_use = 0;
1035         atomic_set(&t->tids_in_use, 0);
1036         spin_lock_init(&t->stid_lock);
1037         spin_lock_init(&t->atid_lock);
1038
1039         /*
1040          * Setup the free lists for stid_tab and atid_tab.
1041          */
1042         if (nstids) {
1043                 while (--nstids)
1044                         t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1045                 t->sfree = t->stid_tab;
1046         }
1047         if (natids) {
1048                 while (--natids)
1049                         t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1050                 t->afree = t->atid_tab;
1051         }
1052         return 0;
1053 }
1054
1055 static void free_tid_maps(struct tid_info *t)
1056 {
1057         cxgb_free_mem(t->tid_tab);
1058 }
1059
1060 static inline void add_adapter(struct adapter *adap)
1061 {
1062         write_lock_bh(&adapter_list_lock);
1063         list_add_tail(&adap->adapter_list, &adapter_list);
1064         write_unlock_bh(&adapter_list_lock);
1065 }
1066
1067 static inline void remove_adapter(struct adapter *adap)
1068 {
1069         write_lock_bh(&adapter_list_lock);
1070         list_del(&adap->adapter_list);
1071         write_unlock_bh(&adapter_list_lock);
1072 }
1073
1074 int cxgb3_offload_activate(struct adapter *adapter)
1075 {
1076         struct t3cdev *dev = &adapter->tdev;
1077         int natids, err;
1078         struct t3c_data *t;
1079         struct tid_range stid_range, tid_range;
1080         struct mtutab mtutab;
1081         unsigned int l2t_capacity;
1082
1083         t = kcalloc(1, sizeof(*t), GFP_KERNEL);
1084         if (!t)
1085                 return -ENOMEM;
1086
1087         err = -EOPNOTSUPP;
1088         if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1089             dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1090             dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1091             dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1092             dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1093             dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1094                 goto out_free;
1095
1096         err = -ENOMEM;
1097         L2DATA(dev) = t3_init_l2t(l2t_capacity);
1098         if (!L2DATA(dev))
1099                 goto out_free;
1100
1101         natids = min(tid_range.num / 2, MAX_ATIDS);
1102         err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1103                             stid_range.num, ATID_BASE, stid_range.base);
1104         if (err)
1105                 goto out_free_l2t;
1106
1107         t->mtus = mtutab.mtus;
1108         t->nmtus = mtutab.size;
1109
1110         INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1111         spin_lock_init(&t->tid_release_lock);
1112         INIT_LIST_HEAD(&t->list_node);
1113         t->dev = dev;
1114
1115         T3C_DATA(dev) = t;
1116         dev->recv = process_rx;
1117         dev->neigh_update = t3_l2t_update;
1118
1119         /* Register netevent handler once */
1120         if (list_empty(&adapter_list))
1121                 register_netevent_notifier(&nb);
1122
1123         add_adapter(adapter);
1124         return 0;
1125
1126 out_free_l2t:
1127         t3_free_l2t(L2DATA(dev));
1128         L2DATA(dev) = NULL;
1129 out_free:
1130         kfree(t);
1131         return err;
1132 }
1133
1134 void cxgb3_offload_deactivate(struct adapter *adapter)
1135 {
1136         struct t3cdev *tdev = &adapter->tdev;
1137         struct t3c_data *t = T3C_DATA(tdev);
1138
1139         remove_adapter(adapter);
1140         if (list_empty(&adapter_list))
1141                 unregister_netevent_notifier(&nb);
1142
1143         free_tid_maps(&t->tid_maps);
1144         T3C_DATA(tdev) = NULL;
1145         t3_free_l2t(L2DATA(tdev));
1146         L2DATA(tdev) = NULL;
1147         kfree(t);
1148 }
1149
1150 static inline void register_tdev(struct t3cdev *tdev)
1151 {
1152         static int unit;
1153
1154         mutex_lock(&cxgb3_db_lock);
1155         snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1156         list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1157         mutex_unlock(&cxgb3_db_lock);
1158 }
1159
1160 static inline void unregister_tdev(struct t3cdev *tdev)
1161 {
1162         mutex_lock(&cxgb3_db_lock);
1163         list_del(&tdev->ofld_dev_list);
1164         mutex_unlock(&cxgb3_db_lock);
1165 }
1166
1167 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1168 {
1169         struct t3cdev *tdev = &adapter->tdev;
1170
1171         INIT_LIST_HEAD(&tdev->ofld_dev_list);
1172
1173         cxgb3_set_dummy_ops(tdev);
1174         tdev->send = t3_offload_tx;
1175         tdev->ctl = cxgb_offload_ctl;
1176         tdev->type = adapter->params.rev == 0 ? T3A : T3B;
1177
1178         register_tdev(tdev);
1179 }
1180
1181 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1182 {
1183         struct t3cdev *tdev = &adapter->tdev;
1184
1185         tdev->recv = NULL;
1186         tdev->neigh_update = NULL;
1187
1188         unregister_tdev(tdev);
1189 }
1190
1191 void __init cxgb3_offload_init(void)
1192 {
1193         int i;
1194
1195         for (i = 0; i < NUM_CPL_CMDS; ++i)
1196                 cpl_handlers[i] = do_bad_cpl;
1197
1198         t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1199         t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1200         t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1201         t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1202         t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1203         t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1204         t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1205         t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1206         t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1207         t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1208         t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1209         t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1210         t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1211         t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1212         t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1213         t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1214         t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1215         t3_register_cpl_handler(CPL_SET_TCB_RPL, do_set_tcb_rpl);
1216         t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1217         t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1218         t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1219         t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1220         t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1221         t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1222 }