cxgb3 Fix copyrights in the cxgb3 driver.
[linux-2.6.git] / drivers / net / cxgb3 / cxgb3_offload.c
1 /*
2  * Copyright (c) 2006-2007 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 = 0x100000;
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                 const 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 = grp ? grp->vlan_devices[vlan] : NULL;
171                         } else
172                                 while (dev->master)
173                                         dev = dev->master;
174                         return dev;
175                 }
176         }
177         return NULL;
178 }
179
180 static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
181                               void *data)
182 {
183         int ret = 0;
184         struct ulp_iscsi_info *uiip = data;
185
186         switch (req) {
187         case ULP_ISCSI_GET_PARAMS:
188                 uiip->pdev = adapter->pdev;
189                 uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
190                 uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
191                 uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
192                 /*
193                  * On tx, the iscsi pdu has to be <= tx page size and has to
194                  * fit into the Tx PM FIFO.
195                  */
196                 uiip->max_txsz = min(adapter->params.tp.tx_pg_size,
197                                      t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
198                 /* on rx, the iscsi pdu has to be < rx page size and the
199                    whole pdu + cpl headers has to fit into one sge buffer */
200                 uiip->max_rxsz = min_t(unsigned int,
201                                        adapter->params.tp.rx_pg_size,
202                                        (adapter->sge.qs[0].fl[1].buf_size -
203                                         sizeof(struct cpl_rx_data) * 2 -
204                                         sizeof(struct cpl_rx_data_ddp)));
205                 break;
206         case ULP_ISCSI_SET_PARAMS:
207                 t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
208                 break;
209         default:
210                 ret = -EOPNOTSUPP;
211         }
212         return ret;
213 }
214
215 /* Response queue used for RDMA events. */
216 #define ASYNC_NOTIF_RSPQ 0
217
218 static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
219 {
220         int ret = 0;
221
222         switch (req) {
223         case RDMA_GET_PARAMS:{
224                 struct rdma_info *req = data;
225                 struct pci_dev *pdev = adapter->pdev;
226
227                 req->udbell_physbase = pci_resource_start(pdev, 2);
228                 req->udbell_len = pci_resource_len(pdev, 2);
229                 req->tpt_base =
230                         t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
231                 req->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
232                 req->pbl_base =
233                         t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
234                 req->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
235                 req->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
236                 req->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
237                 req->kdb_addr = adapter->regs + A_SG_KDOORBELL;
238                 req->pdev = pdev;
239                 break;
240         }
241         case RDMA_CQ_OP:{
242                 unsigned long flags;
243                 struct rdma_cq_op *req = data;
244
245                 /* may be called in any context */
246                 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
247                 ret = t3_sge_cqcntxt_op(adapter, req->id, req->op,
248                                         req->credits);
249                 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
250                 break;
251         }
252         case RDMA_GET_MEM:{
253                 struct ch_mem_range *t = data;
254                 struct mc7 *mem;
255
256                 if ((t->addr & 7) || (t->len & 7))
257                         return -EINVAL;
258                 if (t->mem_id == MEM_CM)
259                         mem = &adapter->cm;
260                 else if (t->mem_id == MEM_PMRX)
261                         mem = &adapter->pmrx;
262                 else if (t->mem_id == MEM_PMTX)
263                         mem = &adapter->pmtx;
264                 else
265                         return -EINVAL;
266
267                 ret =
268                         t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
269                                         (u64 *) t->buf);
270                 if (ret)
271                         return ret;
272                 break;
273         }
274         case RDMA_CQ_SETUP:{
275                 struct rdma_cq_setup *req = data;
276
277                 spin_lock_irq(&adapter->sge.reg_lock);
278                 ret =
279                         t3_sge_init_cqcntxt(adapter, req->id,
280                                         req->base_addr, req->size,
281                                         ASYNC_NOTIF_RSPQ,
282                                         req->ovfl_mode, req->credits,
283                                         req->credit_thres);
284                 spin_unlock_irq(&adapter->sge.reg_lock);
285                 break;
286         }
287         case RDMA_CQ_DISABLE:
288                 spin_lock_irq(&adapter->sge.reg_lock);
289                 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
290                 spin_unlock_irq(&adapter->sge.reg_lock);
291                 break;
292         case RDMA_CTRL_QP_SETUP:{
293                 struct rdma_ctrlqp_setup *req = data;
294
295                 spin_lock_irq(&adapter->sge.reg_lock);
296                 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
297                                                 SGE_CNTXT_RDMA,
298                                                 ASYNC_NOTIF_RSPQ,
299                                                 req->base_addr, req->size,
300                                                 FW_RI_TID_START, 1, 0);
301                 spin_unlock_irq(&adapter->sge.reg_lock);
302                 break;
303         }
304         default:
305                 ret = -EOPNOTSUPP;
306         }
307         return ret;
308 }
309
310 static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
311 {
312         struct adapter *adapter = tdev2adap(tdev);
313         struct tid_range *tid;
314         struct mtutab *mtup;
315         struct iff_mac *iffmacp;
316         struct ddp_params *ddpp;
317         struct adap_ports *ports;
318         int i;
319
320         switch (req) {
321         case GET_MAX_OUTSTANDING_WR:
322                 *(unsigned int *)data = FW_WR_NUM;
323                 break;
324         case GET_WR_LEN:
325                 *(unsigned int *)data = WR_FLITS;
326                 break;
327         case GET_TX_MAX_CHUNK:
328                 *(unsigned int *)data = 1 << 20;        /* 1MB */
329                 break;
330         case GET_TID_RANGE:
331                 tid = data;
332                 tid->num = t3_mc5_size(&adapter->mc5) -
333                     adapter->params.mc5.nroutes -
334                     adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
335                 tid->base = 0;
336                 break;
337         case GET_STID_RANGE:
338                 tid = data;
339                 tid->num = adapter->params.mc5.nservers;
340                 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
341                     adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
342                 break;
343         case GET_L2T_CAPACITY:
344                 *(unsigned int *)data = 2048;
345                 break;
346         case GET_MTUS:
347                 mtup = data;
348                 mtup->size = NMTUS;
349                 mtup->mtus = adapter->params.mtus;
350                 break;
351         case GET_IFF_FROM_MAC:
352                 iffmacp = data;
353                 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
354                                                 iffmacp->vlan_tag &
355                                                 VLAN_VID_MASK);
356                 break;
357         case GET_DDP_PARAMS:
358                 ddpp = data;
359                 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
360                 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
361                 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
362                 break;
363         case GET_PORTS:
364                 ports = data;
365                 ports->nports = adapter->params.nports;
366                 for_each_port(adapter, i)
367                         ports->lldevs[i] = adapter->port[i];
368                 break;
369         case ULP_ISCSI_GET_PARAMS:
370         case ULP_ISCSI_SET_PARAMS:
371                 if (!offload_running(adapter))
372                         return -EAGAIN;
373                 return cxgb_ulp_iscsi_ctl(adapter, req, data);
374         case RDMA_GET_PARAMS:
375         case RDMA_CQ_OP:
376         case RDMA_CQ_SETUP:
377         case RDMA_CQ_DISABLE:
378         case RDMA_CTRL_QP_SETUP:
379         case RDMA_GET_MEM:
380                 if (!offload_running(adapter))
381                         return -EAGAIN;
382                 return cxgb_rdma_ctl(adapter, req, data);
383         default:
384                 return -EOPNOTSUPP;
385         }
386         return 0;
387 }
388
389 /*
390  * Dummy handler for Rx offload packets in case we get an offload packet before
391  * proper processing is setup.  This complains and drops the packet as it isn't
392  * normal to get offload packets at this stage.
393  */
394 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
395                                 int n)
396 {
397         CH_ERR(tdev2adap(dev), "%d unexpected offload packets, first data %u\n",
398                n, ntohl(*(__be32 *)skbs[0]->data));
399         while (n--)
400                 dev_kfree_skb_any(skbs[n]);
401         return 0;
402 }
403
404 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
405 {
406 }
407
408 void cxgb3_set_dummy_ops(struct t3cdev *dev)
409 {
410         dev->recv = rx_offload_blackhole;
411         dev->neigh_update = dummy_neigh_update;
412 }
413
414 /*
415  * Free an active-open TID.
416  */
417 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
418 {
419         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
420         union active_open_entry *p = atid2entry(t, atid);
421         void *ctx = p->t3c_tid.ctx;
422
423         spin_lock_bh(&t->atid_lock);
424         p->next = t->afree;
425         t->afree = p;
426         t->atids_in_use--;
427         spin_unlock_bh(&t->atid_lock);
428
429         return ctx;
430 }
431
432 EXPORT_SYMBOL(cxgb3_free_atid);
433
434 /*
435  * Free a server TID and return it to the free pool.
436  */
437 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
438 {
439         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
440         union listen_entry *p = stid2entry(t, stid);
441
442         spin_lock_bh(&t->stid_lock);
443         p->next = t->sfree;
444         t->sfree = p;
445         t->stids_in_use--;
446         spin_unlock_bh(&t->stid_lock);
447 }
448
449 EXPORT_SYMBOL(cxgb3_free_stid);
450
451 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
452                       void *ctx, unsigned int tid)
453 {
454         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
455
456         t->tid_tab[tid].client = client;
457         t->tid_tab[tid].ctx = ctx;
458         atomic_inc(&t->tids_in_use);
459 }
460
461 EXPORT_SYMBOL(cxgb3_insert_tid);
462
463 /*
464  * Populate a TID_RELEASE WR.  The skb must be already propely sized.
465  */
466 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
467 {
468         struct cpl_tid_release *req;
469
470         skb->priority = CPL_PRIORITY_SETUP;
471         req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
472         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
473         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
474 }
475
476 static void t3_process_tid_release_list(struct work_struct *work)
477 {
478         struct t3c_data *td = container_of(work, struct t3c_data,
479                                            tid_release_task);
480         struct sk_buff *skb;
481         struct t3cdev *tdev = td->dev;
482         
483
484         spin_lock_bh(&td->tid_release_lock);
485         while (td->tid_release_list) {
486                 struct t3c_tid_entry *p = td->tid_release_list;
487
488                 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
489                 spin_unlock_bh(&td->tid_release_lock);
490
491                 skb = alloc_skb(sizeof(struct cpl_tid_release),
492                                 GFP_KERNEL | __GFP_NOFAIL);
493                 mk_tid_release(skb, p - td->tid_maps.tid_tab);
494                 cxgb3_ofld_send(tdev, skb);
495                 p->ctx = NULL;
496                 spin_lock_bh(&td->tid_release_lock);
497         }
498         spin_unlock_bh(&td->tid_release_lock);
499 }
500
501 /* use ctx as a next pointer in the tid release list */
502 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
503 {
504         struct t3c_data *td = T3C_DATA(tdev);
505         struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
506
507         spin_lock_bh(&td->tid_release_lock);
508         p->ctx = (void *)td->tid_release_list;
509         td->tid_release_list = p;
510         if (!p->ctx)
511                 schedule_work(&td->tid_release_task);
512         spin_unlock_bh(&td->tid_release_lock);
513 }
514
515 EXPORT_SYMBOL(cxgb3_queue_tid_release);
516
517 /*
518  * Remove a tid from the TID table.  A client may defer processing its last
519  * CPL message if it is locked at the time it arrives, and while the message
520  * sits in the client's backlog the TID may be reused for another connection.
521  * To handle this we atomically switch the TID association if it still points
522  * to the original client context.
523  */
524 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
525 {
526         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
527
528         BUG_ON(tid >= t->ntids);
529         if (tdev->type == T3A)
530                 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
531         else {
532                 struct sk_buff *skb;
533
534                 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
535                 if (likely(skb)) {
536                         mk_tid_release(skb, tid);
537                         cxgb3_ofld_send(tdev, skb);
538                         t->tid_tab[tid].ctx = NULL;
539                 } else
540                         cxgb3_queue_tid_release(tdev, tid);
541         }
542         atomic_dec(&t->tids_in_use);
543 }
544
545 EXPORT_SYMBOL(cxgb3_remove_tid);
546
547 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
548                      void *ctx)
549 {
550         int atid = -1;
551         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
552
553         spin_lock_bh(&t->atid_lock);
554         if (t->afree) {
555                 union active_open_entry *p = t->afree;
556
557                 atid = (p - t->atid_tab) + t->atid_base;
558                 t->afree = p->next;
559                 p->t3c_tid.ctx = ctx;
560                 p->t3c_tid.client = client;
561                 t->atids_in_use++;
562         }
563         spin_unlock_bh(&t->atid_lock);
564         return atid;
565 }
566
567 EXPORT_SYMBOL(cxgb3_alloc_atid);
568
569 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
570                      void *ctx)
571 {
572         int stid = -1;
573         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
574
575         spin_lock_bh(&t->stid_lock);
576         if (t->sfree) {
577                 union listen_entry *p = t->sfree;
578
579                 stid = (p - t->stid_tab) + t->stid_base;
580                 t->sfree = p->next;
581                 p->t3c_tid.ctx = ctx;
582                 p->t3c_tid.client = client;
583                 t->stids_in_use++;
584         }
585         spin_unlock_bh(&t->stid_lock);
586         return stid;
587 }
588
589 EXPORT_SYMBOL(cxgb3_alloc_stid);
590
591 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
592 {
593         struct cpl_smt_write_rpl *rpl = cplhdr(skb);
594
595         if (rpl->status != CPL_ERR_NONE)
596                 printk(KERN_ERR
597                        "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
598                        rpl->status, GET_TID(rpl));
599
600         return CPL_RET_BUF_DONE;
601 }
602
603 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
604 {
605         struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
606
607         if (rpl->status != CPL_ERR_NONE)
608                 printk(KERN_ERR
609                        "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
610                        rpl->status, GET_TID(rpl));
611
612         return CPL_RET_BUF_DONE;
613 }
614
615 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
616 {
617         struct cpl_act_open_rpl *rpl = cplhdr(skb);
618         unsigned int atid = G_TID(ntohl(rpl->atid));
619         struct t3c_tid_entry *t3c_tid;
620
621         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
622         if (t3c_tid->ctx && t3c_tid->client && t3c_tid->client->handlers &&
623             t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
624                 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
625                                                                     t3c_tid->
626                                                                     ctx);
627         } else {
628                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
629                        dev->name, CPL_ACT_OPEN_RPL);
630                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
631         }
632 }
633
634 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
635 {
636         union opcode_tid *p = cplhdr(skb);
637         unsigned int stid = G_TID(ntohl(p->opcode_tid));
638         struct t3c_tid_entry *t3c_tid;
639
640         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
641         if (t3c_tid->ctx && t3c_tid->client->handlers &&
642             t3c_tid->client->handlers[p->opcode]) {
643                 return t3c_tid->client->handlers[p->opcode] (dev, skb,
644                                                              t3c_tid->ctx);
645         } else {
646                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
647                        dev->name, p->opcode);
648                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
649         }
650 }
651
652 static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
653 {
654         union opcode_tid *p = cplhdr(skb);
655         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
656         struct t3c_tid_entry *t3c_tid;
657
658         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
659         if (t3c_tid->ctx && t3c_tid->client->handlers &&
660             t3c_tid->client->handlers[p->opcode]) {
661                 return t3c_tid->client->handlers[p->opcode]
662                     (dev, skb, t3c_tid->ctx);
663         } else {
664                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
665                        dev->name, p->opcode);
666                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
667         }
668 }
669
670 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
671 {
672         struct cpl_pass_accept_req *req = cplhdr(skb);
673         unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
674         struct t3c_tid_entry *t3c_tid;
675
676         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
677         if (t3c_tid->ctx && t3c_tid->client->handlers &&
678             t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
679                 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
680                     (dev, skb, t3c_tid->ctx);
681         } else {
682                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
683                        dev->name, CPL_PASS_ACCEPT_REQ);
684                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
685         }
686 }
687
688 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
689 {
690         union opcode_tid *p = cplhdr(skb);
691         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
692         struct t3c_tid_entry *t3c_tid;
693
694         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
695         if (t3c_tid->ctx && t3c_tid->client->handlers &&
696             t3c_tid->client->handlers[p->opcode]) {
697                 return t3c_tid->client->handlers[p->opcode]
698                     (dev, skb, t3c_tid->ctx);
699         } else {
700                 struct cpl_abort_req_rss *req = cplhdr(skb);
701                 struct cpl_abort_rpl *rpl;
702
703                 struct sk_buff *skb =
704                     alloc_skb(sizeof(struct cpl_abort_rpl), GFP_ATOMIC);
705                 if (!skb) {
706                         printk("do_abort_req_rss: couldn't get skb!\n");
707                         goto out;
708                 }
709                 skb->priority = CPL_PRIORITY_DATA;
710                 __skb_put(skb, sizeof(struct cpl_abort_rpl));
711                 rpl = cplhdr(skb);
712                 rpl->wr.wr_hi =
713                     htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
714                 rpl->wr.wr_lo = htonl(V_WR_TID(GET_TID(req)));
715                 OPCODE_TID(rpl) =
716                     htonl(MK_OPCODE_TID(CPL_ABORT_RPL, GET_TID(req)));
717                 rpl->cmd = req->status;
718                 cxgb3_ofld_send(dev, skb);
719 out:
720                 return CPL_RET_BUF_DONE;
721         }
722 }
723
724 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
725 {
726         struct cpl_act_establish *req = cplhdr(skb);
727         unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
728         struct t3c_tid_entry *t3c_tid;
729
730         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
731         if (t3c_tid->ctx && t3c_tid->client->handlers &&
732             t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
733                 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
734                     (dev, skb, t3c_tid->ctx);
735         } else {
736                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
737                        dev->name, CPL_PASS_ACCEPT_REQ);
738                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
739         }
740 }
741
742 static int do_set_tcb_rpl(struct t3cdev *dev, struct sk_buff *skb)
743 {
744         struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
745
746         if (rpl->status != CPL_ERR_NONE)
747                 printk(KERN_ERR
748                        "Unexpected SET_TCB_RPL status %u for tid %u\n",
749                        rpl->status, GET_TID(rpl));
750         return CPL_RET_BUF_DONE;
751 }
752
753 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
754 {
755         struct cpl_trace_pkt *p = cplhdr(skb);
756
757         skb->protocol = htons(0xffff);
758         skb->dev = dev->lldev;
759         skb_pull(skb, sizeof(*p));
760         skb->mac.raw = skb->data;
761         netif_receive_skb(skb);
762         return 0;
763 }
764
765 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
766 {
767         unsigned int hwtid = ntohl(skb->priority) >> 8 & 0xfffff;
768         unsigned int opcode = G_OPCODE(ntohl(skb->csum));
769         struct t3c_tid_entry *t3c_tid;
770
771         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
772         if (t3c_tid->ctx && t3c_tid->client->handlers &&
773             t3c_tid->client->handlers[opcode]) {
774                 return t3c_tid->client->handlers[opcode] (dev, skb,
775                                                           t3c_tid->ctx);
776         } else {
777                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
778                        dev->name, opcode);
779                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
780         }
781 }
782
783 static int nb_callback(struct notifier_block *self, unsigned long event,
784                        void *ctx)
785 {
786         switch (event) {
787         case (NETEVENT_NEIGH_UPDATE):{
788                 cxgb_neigh_update((struct neighbour *)ctx);
789                 break;
790         }
791         case (NETEVENT_PMTU_UPDATE):
792                 break;
793         case (NETEVENT_REDIRECT):{
794                 struct netevent_redirect *nr = ctx;
795                 cxgb_redirect(nr->old, nr->new);
796                 cxgb_neigh_update(nr->new->neighbour);
797                 break;
798         }
799         default:
800                 break;
801         }
802         return 0;
803 }
804
805 static struct notifier_block nb = {
806         .notifier_call = nb_callback
807 };
808
809 /*
810  * Process a received packet with an unknown/unexpected CPL opcode.
811  */
812 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
813 {
814         printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
815                *skb->data);
816         return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
817 }
818
819 /*
820  * Handlers for each CPL opcode
821  */
822 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
823
824 /*
825  * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
826  * to unregister an existing handler.
827  */
828 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
829 {
830         if (opcode < NUM_CPL_CMDS)
831                 cpl_handlers[opcode] = h ? h : do_bad_cpl;
832         else
833                 printk(KERN_ERR "T3C: handler registration for "
834                        "opcode %x failed\n", opcode);
835 }
836
837 EXPORT_SYMBOL(t3_register_cpl_handler);
838
839 /*
840  * T3CDEV's receive method.
841  */
842 int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
843 {
844         while (n--) {
845                 struct sk_buff *skb = *skbs++;
846                 unsigned int opcode = G_OPCODE(ntohl(skb->csum));
847                 int ret = cpl_handlers[opcode] (dev, skb);
848
849 #if VALIDATE_TID
850                 if (ret & CPL_RET_UNKNOWN_TID) {
851                         union opcode_tid *p = cplhdr(skb);
852
853                         printk(KERN_ERR "%s: CPL message (opcode %u) had "
854                                "unknown TID %u\n", dev->name, opcode,
855                                G_TID(ntohl(p->opcode_tid)));
856                 }
857 #endif
858                 if (ret & CPL_RET_BUF_DONE)
859                         kfree_skb(skb);
860         }
861         return 0;
862 }
863
864 /*
865  * Sends an sk_buff to a T3C driver after dealing with any active network taps.
866  */
867 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
868 {
869         int r;
870
871         local_bh_disable();
872         r = dev->send(dev, skb);
873         local_bh_enable();
874         return r;
875 }
876
877 EXPORT_SYMBOL(cxgb3_ofld_send);
878
879 static int is_offloading(struct net_device *dev)
880 {
881         struct adapter *adapter;
882         int i;
883
884         read_lock_bh(&adapter_list_lock);
885         list_for_each_entry(adapter, &adapter_list, adapter_list) {
886                 for_each_port(adapter, i) {
887                         if (dev == adapter->port[i]) {
888                                 read_unlock_bh(&adapter_list_lock);
889                                 return 1;
890                         }
891                 }
892         }
893         read_unlock_bh(&adapter_list_lock);
894         return 0;
895 }
896
897 void cxgb_neigh_update(struct neighbour *neigh)
898 {
899         struct net_device *dev = neigh->dev;
900
901         if (dev && (is_offloading(dev))) {
902                 struct t3cdev *tdev = T3CDEV(dev);
903
904                 BUG_ON(!tdev);
905                 t3_l2t_update(tdev, neigh);
906         }
907 }
908
909 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
910 {
911         struct sk_buff *skb;
912         struct cpl_set_tcb_field *req;
913
914         skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
915         if (!skb) {
916                 printk(KERN_ERR "%s: cannot allocate skb!\n", __FUNCTION__);
917                 return;
918         }
919         skb->priority = CPL_PRIORITY_CONTROL;
920         req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
921         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
922         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
923         req->reply = 0;
924         req->cpu_idx = 0;
925         req->word = htons(W_TCB_L2T_IX);
926         req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
927         req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
928         tdev->send(tdev, skb);
929 }
930
931 void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
932 {
933         struct net_device *olddev, *newdev;
934         struct tid_info *ti;
935         struct t3cdev *tdev;
936         u32 tid;
937         int update_tcb;
938         struct l2t_entry *e;
939         struct t3c_tid_entry *te;
940
941         olddev = old->neighbour->dev;
942         newdev = new->neighbour->dev;
943         if (!is_offloading(olddev))
944                 return;
945         if (!is_offloading(newdev)) {
946                 printk(KERN_WARNING "%s: Redirect to non-offload"
947                        "device ignored.\n", __FUNCTION__);
948                 return;
949         }
950         tdev = T3CDEV(olddev);
951         BUG_ON(!tdev);
952         if (tdev != T3CDEV(newdev)) {
953                 printk(KERN_WARNING "%s: Redirect to different "
954                        "offload device ignored.\n", __FUNCTION__);
955                 return;
956         }
957
958         /* Add new L2T entry */
959         e = t3_l2t_get(tdev, new->neighbour, newdev);
960         if (!e) {
961                 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
962                        __FUNCTION__);
963                 return;
964         }
965
966         /* Walk tid table and notify clients of dst change. */
967         ti = &(T3C_DATA(tdev))->tid_maps;
968         for (tid = 0; tid < ti->ntids; tid++) {
969                 te = lookup_tid(ti, tid);
970                 BUG_ON(!te);
971                 if (te->ctx && te->client && te->client->redirect) {
972                         update_tcb = te->client->redirect(te->ctx, old, new, e);
973                         if (update_tcb) {
974                                 l2t_hold(L2DATA(tdev), e);
975                                 set_l2t_ix(tdev, tid, e);
976                         }
977                 }
978         }
979         l2t_release(L2DATA(tdev), e);
980 }
981
982 /*
983  * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
984  * The allocated memory is cleared.
985  */
986 void *cxgb_alloc_mem(unsigned long size)
987 {
988         void *p = kmalloc(size, GFP_KERNEL);
989
990         if (!p)
991                 p = vmalloc(size);
992         if (p)
993                 memset(p, 0, size);
994         return p;
995 }
996
997 /*
998  * Free memory allocated through t3_alloc_mem().
999  */
1000 void cxgb_free_mem(void *addr)
1001 {
1002         unsigned long p = (unsigned long)addr;
1003
1004         if (p >= VMALLOC_START && p < VMALLOC_END)
1005                 vfree(addr);
1006         else
1007                 kfree(addr);
1008 }
1009
1010 /*
1011  * Allocate and initialize the TID tables.  Returns 0 on success.
1012  */
1013 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1014                          unsigned int natids, unsigned int nstids,
1015                          unsigned int atid_base, unsigned int stid_base)
1016 {
1017         unsigned long size = ntids * sizeof(*t->tid_tab) +
1018             natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1019
1020         t->tid_tab = cxgb_alloc_mem(size);
1021         if (!t->tid_tab)
1022                 return -ENOMEM;
1023
1024         t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1025         t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1026         t->ntids = ntids;
1027         t->nstids = nstids;
1028         t->stid_base = stid_base;
1029         t->sfree = NULL;
1030         t->natids = natids;
1031         t->atid_base = atid_base;
1032         t->afree = NULL;
1033         t->stids_in_use = t->atids_in_use = 0;
1034         atomic_set(&t->tids_in_use, 0);
1035         spin_lock_init(&t->stid_lock);
1036         spin_lock_init(&t->atid_lock);
1037
1038         /*
1039          * Setup the free lists for stid_tab and atid_tab.
1040          */
1041         if (nstids) {
1042                 while (--nstids)
1043                         t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1044                 t->sfree = t->stid_tab;
1045         }
1046         if (natids) {
1047                 while (--natids)
1048                         t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1049                 t->afree = t->atid_tab;
1050         }
1051         return 0;
1052 }
1053
1054 static void free_tid_maps(struct tid_info *t)
1055 {
1056         cxgb_free_mem(t->tid_tab);
1057 }
1058
1059 static inline void add_adapter(struct adapter *adap)
1060 {
1061         write_lock_bh(&adapter_list_lock);
1062         list_add_tail(&adap->adapter_list, &adapter_list);
1063         write_unlock_bh(&adapter_list_lock);
1064 }
1065
1066 static inline void remove_adapter(struct adapter *adap)
1067 {
1068         write_lock_bh(&adapter_list_lock);
1069         list_del(&adap->adapter_list);
1070         write_unlock_bh(&adapter_list_lock);
1071 }
1072
1073 int cxgb3_offload_activate(struct adapter *adapter)
1074 {
1075         struct t3cdev *dev = &adapter->tdev;
1076         int natids, err;
1077         struct t3c_data *t;
1078         struct tid_range stid_range, tid_range;
1079         struct mtutab mtutab;
1080         unsigned int l2t_capacity;
1081
1082         t = kcalloc(1, sizeof(*t), GFP_KERNEL);
1083         if (!t)
1084                 return -ENOMEM;
1085
1086         err = -EOPNOTSUPP;
1087         if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1088             dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1089             dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1090             dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1091             dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1092             dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1093                 goto out_free;
1094
1095         err = -ENOMEM;
1096         L2DATA(dev) = t3_init_l2t(l2t_capacity);
1097         if (!L2DATA(dev))
1098                 goto out_free;
1099
1100         natids = min(tid_range.num / 2, MAX_ATIDS);
1101         err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1102                             stid_range.num, ATID_BASE, stid_range.base);
1103         if (err)
1104                 goto out_free_l2t;
1105
1106         t->mtus = mtutab.mtus;
1107         t->nmtus = mtutab.size;
1108
1109         INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1110         spin_lock_init(&t->tid_release_lock);
1111         INIT_LIST_HEAD(&t->list_node);
1112         t->dev = dev;
1113
1114         T3C_DATA(dev) = t;
1115         dev->recv = process_rx;
1116         dev->neigh_update = t3_l2t_update;
1117
1118         /* Register netevent handler once */
1119         if (list_empty(&adapter_list))
1120                 register_netevent_notifier(&nb);
1121
1122         add_adapter(adapter);
1123         return 0;
1124
1125 out_free_l2t:
1126         t3_free_l2t(L2DATA(dev));
1127         L2DATA(dev) = NULL;
1128 out_free:
1129         kfree(t);
1130         return err;
1131 }
1132
1133 void cxgb3_offload_deactivate(struct adapter *adapter)
1134 {
1135         struct t3cdev *tdev = &adapter->tdev;
1136         struct t3c_data *t = T3C_DATA(tdev);
1137
1138         remove_adapter(adapter);
1139         if (list_empty(&adapter_list))
1140                 unregister_netevent_notifier(&nb);
1141
1142         free_tid_maps(&t->tid_maps);
1143         T3C_DATA(tdev) = NULL;
1144         t3_free_l2t(L2DATA(tdev));
1145         L2DATA(tdev) = NULL;
1146         kfree(t);
1147 }
1148
1149 static inline void register_tdev(struct t3cdev *tdev)
1150 {
1151         static int unit;
1152
1153         mutex_lock(&cxgb3_db_lock);
1154         snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1155         list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1156         mutex_unlock(&cxgb3_db_lock);
1157 }
1158
1159 static inline void unregister_tdev(struct t3cdev *tdev)
1160 {
1161         mutex_lock(&cxgb3_db_lock);
1162         list_del(&tdev->ofld_dev_list);
1163         mutex_unlock(&cxgb3_db_lock);
1164 }
1165
1166 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1167 {
1168         struct t3cdev *tdev = &adapter->tdev;
1169
1170         INIT_LIST_HEAD(&tdev->ofld_dev_list);
1171
1172         cxgb3_set_dummy_ops(tdev);
1173         tdev->send = t3_offload_tx;
1174         tdev->ctl = cxgb_offload_ctl;
1175         tdev->type = adapter->params.rev == 0 ? T3A : T3B;
1176
1177         register_tdev(tdev);
1178 }
1179
1180 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1181 {
1182         struct t3cdev *tdev = &adapter->tdev;
1183
1184         tdev->recv = NULL;
1185         tdev->neigh_update = NULL;
1186
1187         unregister_tdev(tdev);
1188 }
1189
1190 void __init cxgb3_offload_init(void)
1191 {
1192         int i;
1193
1194         for (i = 0; i < NUM_CPL_CMDS; ++i)
1195                 cpl_handlers[i] = do_bad_cpl;
1196
1197         t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1198         t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1199         t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1200         t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1201         t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1202         t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1203         t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1204         t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1205         t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1206         t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1207         t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1208         t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1209         t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1210         t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1211         t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1212         t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1213         t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1214         t3_register_cpl_handler(CPL_SET_TCB_RPL, do_set_tcb_rpl);
1215         t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1216         t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1217         t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1218         t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1219         t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1220         t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1221 }