Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2
[linux-2.6] / drivers / net / cxgb3 / cxgb3_offload.c
1 /*
2  * Copyright (c) 2006-2008 Chelsio, Inc. All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *        copyright notice, this list of conditions and the following
16  *        disclaimer.
17  *
18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer in the documentation and/or other materials
21  *        provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  */
32
33 #include <linux/list.h>
34 #include <net/neighbour.h>
35 #include <linux/notifier.h>
36 #include <asm/atomic.h>
37 #include <linux/proc_fs.h>
38 #include <linux/if_vlan.h>
39 #include <net/netevent.h>
40 #include <linux/highmem.h>
41 #include <linux/vmalloc.h>
42
43 #include "common.h"
44 #include "regs.h"
45 #include "cxgb3_ioctl.h"
46 #include "cxgb3_ctl_defs.h"
47 #include "cxgb3_defs.h"
48 #include "l2t.h"
49 #include "firmware_exports.h"
50 #include "cxgb3_offload.h"
51
52 static LIST_HEAD(client_list);
53 static LIST_HEAD(ofld_dev_list);
54 static DEFINE_MUTEX(cxgb3_db_lock);
55
56 static DEFINE_RWLOCK(adapter_list_lock);
57 static LIST_HEAD(adapter_list);
58
59 static const unsigned int MAX_ATIDS = 64 * 1024;
60 static const unsigned int ATID_BASE = 0x10000;
61
62 static inline int offload_activated(struct t3cdev *tdev)
63 {
64         const struct adapter *adapter = tdev2adap(tdev);
65
66         return (test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map));
67 }
68
69 /**
70  *      cxgb3_register_client - register an offload client
71  *      @client: the client
72  *
73  *      Add the client to the client list,
74  *      and call backs the client for each activated offload device
75  */
76 void cxgb3_register_client(struct cxgb3_client *client)
77 {
78         struct t3cdev *tdev;
79
80         mutex_lock(&cxgb3_db_lock);
81         list_add_tail(&client->client_list, &client_list);
82
83         if (client->add) {
84                 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
85                         if (offload_activated(tdev))
86                                 client->add(tdev);
87                 }
88         }
89         mutex_unlock(&cxgb3_db_lock);
90 }
91
92 EXPORT_SYMBOL(cxgb3_register_client);
93
94 /**
95  *      cxgb3_unregister_client - unregister an offload client
96  *      @client: the client
97  *
98  *      Remove the client to the client list,
99  *      and call backs the client for each activated offload device.
100  */
101 void cxgb3_unregister_client(struct cxgb3_client *client)
102 {
103         struct t3cdev *tdev;
104
105         mutex_lock(&cxgb3_db_lock);
106         list_del(&client->client_list);
107
108         if (client->remove) {
109                 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
110                         if (offload_activated(tdev))
111                                 client->remove(tdev);
112                 }
113         }
114         mutex_unlock(&cxgb3_db_lock);
115 }
116
117 EXPORT_SYMBOL(cxgb3_unregister_client);
118
119 /**
120  *      cxgb3_add_clients - activate registered clients for an offload device
121  *      @tdev: the offload device
122  *
123  *      Call backs all registered clients once a offload device is activated
124  */
125 void cxgb3_add_clients(struct t3cdev *tdev)
126 {
127         struct cxgb3_client *client;
128
129         mutex_lock(&cxgb3_db_lock);
130         list_for_each_entry(client, &client_list, client_list) {
131                 if (client->add)
132                         client->add(tdev);
133         }
134         mutex_unlock(&cxgb3_db_lock);
135 }
136
137 /**
138  *      cxgb3_remove_clients - deactivates registered clients
139  *                             for an offload device
140  *      @tdev: the offload device
141  *
142  *      Call backs all registered clients once a offload device is deactivated
143  */
144 void cxgb3_remove_clients(struct t3cdev *tdev)
145 {
146         struct cxgb3_client *client;
147
148         mutex_lock(&cxgb3_db_lock);
149         list_for_each_entry(client, &client_list, client_list) {
150                 if (client->remove)
151                         client->remove(tdev);
152         }
153         mutex_unlock(&cxgb3_db_lock);
154 }
155
156 void cxgb3_err_notify(struct t3cdev *tdev, u32 status, u32 error)
157 {
158         struct cxgb3_client *client;
159
160         mutex_lock(&cxgb3_db_lock);
161         list_for_each_entry(client, &client_list, client_list) {
162                 if (client->err_handler)
163                         client->err_handler(tdev, status, error);
164         }
165         mutex_unlock(&cxgb3_db_lock);
166 }
167
168 static struct net_device *get_iff_from_mac(struct adapter *adapter,
169                                            const unsigned char *mac,
170                                            unsigned int vlan)
171 {
172         int i;
173
174         for_each_port(adapter, i) {
175                 struct vlan_group *grp;
176                 struct net_device *dev = adapter->port[i];
177                 const struct port_info *p = netdev_priv(dev);
178
179                 if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) {
180                         if (vlan && vlan != VLAN_VID_MASK) {
181                                 grp = p->vlan_grp;
182                                 dev = NULL;
183                                 if (grp)
184                                         dev = vlan_group_get_device(grp, vlan);
185                         } else
186                                 while (dev->master)
187                                         dev = dev->master;
188                         return dev;
189                 }
190         }
191         return NULL;
192 }
193
194 static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
195                               void *data)
196 {
197         int i;
198         int ret = 0;
199         unsigned int val = 0;
200         struct ulp_iscsi_info *uiip = data;
201
202         switch (req) {
203         case ULP_ISCSI_GET_PARAMS:
204                 uiip->pdev = adapter->pdev;
205                 uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
206                 uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
207                 uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
208
209                 val = t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ);
210                 for (i = 0; i < 4; i++, val >>= 8)
211                         uiip->pgsz_factor[i] = val & 0xFF;
212
213                 val = t3_read_reg(adapter, A_TP_PARA_REG7);
214                 uiip->max_txsz =
215                 uiip->max_rxsz = min((val >> S_PMMAXXFERLEN0)&M_PMMAXXFERLEN0,
216                                      (val >> S_PMMAXXFERLEN1)&M_PMMAXXFERLEN1);
217                 /*
218                  * On tx, the iscsi pdu has to be <= tx page size and has to
219                  * fit into the Tx PM FIFO.
220                  */
221                 val = min(adapter->params.tp.tx_pg_size,
222                           t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
223                 uiip->max_txsz = min(val, uiip->max_txsz);
224
225                 /* set MaxRxData to 16224 */
226                 val = t3_read_reg(adapter, A_TP_PARA_REG2);
227                 if ((val >> S_MAXRXDATA) != 0x3f60) {
228                         val &= (M_RXCOALESCESIZE << S_RXCOALESCESIZE);
229                         val |= V_MAXRXDATA(0x3f60);
230                         printk(KERN_INFO
231                                 "%s, iscsi set MaxRxData to 16224 (0x%x).\n",
232                                 adapter->name, val);
233                         t3_write_reg(adapter, A_TP_PARA_REG2, val);
234                 }
235
236                 /*
237                  * on rx, the iscsi pdu has to be < rx page size and the
238                  * the max rx data length programmed in TP
239                  */
240                 val = min(adapter->params.tp.rx_pg_size,
241                           ((t3_read_reg(adapter, A_TP_PARA_REG2)) >>
242                                 S_MAXRXDATA) & M_MAXRXDATA);
243                 uiip->max_rxsz = min(val, uiip->max_rxsz);
244                 break;
245         case ULP_ISCSI_SET_PARAMS:
246                 t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
247                 /* program the ddp page sizes */
248                 for (i = 0; i < 4; i++)
249                         val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
250                 if (val && (val != t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ))) {
251                         printk(KERN_INFO
252                                 "%s, setting iscsi pgsz 0x%x, %u,%u,%u,%u.\n",
253                                 adapter->name, val, uiip->pgsz_factor[0],
254                                 uiip->pgsz_factor[1], uiip->pgsz_factor[2],
255                                 uiip->pgsz_factor[3]);
256                         t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
257                 }
258                 break;
259         default:
260                 ret = -EOPNOTSUPP;
261         }
262         return ret;
263 }
264
265 /* Response queue used for RDMA events. */
266 #define ASYNC_NOTIF_RSPQ 0
267
268 static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
269 {
270         int ret = 0;
271
272         switch (req) {
273         case RDMA_GET_PARAMS: {
274                 struct rdma_info *rdma = data;
275                 struct pci_dev *pdev = adapter->pdev;
276
277                 rdma->udbell_physbase = pci_resource_start(pdev, 2);
278                 rdma->udbell_len = pci_resource_len(pdev, 2);
279                 rdma->tpt_base =
280                         t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
281                 rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
282                 rdma->pbl_base =
283                         t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
284                 rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
285                 rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
286                 rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
287                 rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
288                 rdma->pdev = pdev;
289                 break;
290         }
291         case RDMA_CQ_OP:{
292                 unsigned long flags;
293                 struct rdma_cq_op *rdma = data;
294
295                 /* may be called in any context */
296                 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
297                 ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
298                                         rdma->credits);
299                 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
300                 break;
301         }
302         case RDMA_GET_MEM:{
303                 struct ch_mem_range *t = data;
304                 struct mc7 *mem;
305
306                 if ((t->addr & 7) || (t->len & 7))
307                         return -EINVAL;
308                 if (t->mem_id == MEM_CM)
309                         mem = &adapter->cm;
310                 else if (t->mem_id == MEM_PMRX)
311                         mem = &adapter->pmrx;
312                 else if (t->mem_id == MEM_PMTX)
313                         mem = &adapter->pmtx;
314                 else
315                         return -EINVAL;
316
317                 ret =
318                         t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
319                                         (u64 *) t->buf);
320                 if (ret)
321                         return ret;
322                 break;
323         }
324         case RDMA_CQ_SETUP:{
325                 struct rdma_cq_setup *rdma = data;
326
327                 spin_lock_irq(&adapter->sge.reg_lock);
328                 ret =
329                         t3_sge_init_cqcntxt(adapter, rdma->id,
330                                         rdma->base_addr, rdma->size,
331                                         ASYNC_NOTIF_RSPQ,
332                                         rdma->ovfl_mode, rdma->credits,
333                                         rdma->credit_thres);
334                 spin_unlock_irq(&adapter->sge.reg_lock);
335                 break;
336         }
337         case RDMA_CQ_DISABLE:
338                 spin_lock_irq(&adapter->sge.reg_lock);
339                 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
340                 spin_unlock_irq(&adapter->sge.reg_lock);
341                 break;
342         case RDMA_CTRL_QP_SETUP:{
343                 struct rdma_ctrlqp_setup *rdma = data;
344
345                 spin_lock_irq(&adapter->sge.reg_lock);
346                 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
347                                                 SGE_CNTXT_RDMA,
348                                                 ASYNC_NOTIF_RSPQ,
349                                                 rdma->base_addr, rdma->size,
350                                                 FW_RI_TID_START, 1, 0);
351                 spin_unlock_irq(&adapter->sge.reg_lock);
352                 break;
353         }
354         case RDMA_GET_MIB: {
355                 spin_lock(&adapter->stats_lock);
356                 t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
357                 spin_unlock(&adapter->stats_lock);
358                 break;
359         }
360         default:
361                 ret = -EOPNOTSUPP;
362         }
363         return ret;
364 }
365
366 static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
367 {
368         struct adapter *adapter = tdev2adap(tdev);
369         struct tid_range *tid;
370         struct mtutab *mtup;
371         struct iff_mac *iffmacp;
372         struct ddp_params *ddpp;
373         struct adap_ports *ports;
374         struct ofld_page_info *rx_page_info;
375         struct tp_params *tp = &adapter->params.tp;
376         int i;
377
378         switch (req) {
379         case GET_MAX_OUTSTANDING_WR:
380                 *(unsigned int *)data = FW_WR_NUM;
381                 break;
382         case GET_WR_LEN:
383                 *(unsigned int *)data = WR_FLITS;
384                 break;
385         case GET_TX_MAX_CHUNK:
386                 *(unsigned int *)data = 1 << 20;        /* 1MB */
387                 break;
388         case GET_TID_RANGE:
389                 tid = data;
390                 tid->num = t3_mc5_size(&adapter->mc5) -
391                     adapter->params.mc5.nroutes -
392                     adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
393                 tid->base = 0;
394                 break;
395         case GET_STID_RANGE:
396                 tid = data;
397                 tid->num = adapter->params.mc5.nservers;
398                 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
399                     adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
400                 break;
401         case GET_L2T_CAPACITY:
402                 *(unsigned int *)data = 2048;
403                 break;
404         case GET_MTUS:
405                 mtup = data;
406                 mtup->size = NMTUS;
407                 mtup->mtus = adapter->params.mtus;
408                 break;
409         case GET_IFF_FROM_MAC:
410                 iffmacp = data;
411                 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
412                                                 iffmacp->vlan_tag &
413                                                 VLAN_VID_MASK);
414                 break;
415         case GET_DDP_PARAMS:
416                 ddpp = data;
417                 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
418                 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
419                 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
420                 break;
421         case GET_PORTS:
422                 ports = data;
423                 ports->nports = adapter->params.nports;
424                 for_each_port(adapter, i)
425                         ports->lldevs[i] = adapter->port[i];
426                 break;
427         case ULP_ISCSI_GET_PARAMS:
428         case ULP_ISCSI_SET_PARAMS:
429                 if (!offload_running(adapter))
430                         return -EAGAIN;
431                 return cxgb_ulp_iscsi_ctl(adapter, req, data);
432         case RDMA_GET_PARAMS:
433         case RDMA_CQ_OP:
434         case RDMA_CQ_SETUP:
435         case RDMA_CQ_DISABLE:
436         case RDMA_CTRL_QP_SETUP:
437         case RDMA_GET_MEM:
438         case RDMA_GET_MIB:
439                 if (!offload_running(adapter))
440                         return -EAGAIN;
441                 return cxgb_rdma_ctl(adapter, req, data);
442         case GET_RX_PAGE_INFO:
443                 rx_page_info = data;
444                 rx_page_info->page_size = tp->rx_pg_size;
445                 rx_page_info->num = tp->rx_num_pgs;
446                 break;
447         case GET_ISCSI_IPV4ADDR: {
448                 struct iscsi_ipv4addr *p = data;
449                 struct port_info *pi = netdev_priv(p->dev);
450                 p->ipv4addr = pi->iscsi_ipv4addr;
451                 break;
452         }
453         case GET_EMBEDDED_INFO: {
454                 struct ch_embedded_info *e = data;
455
456                 spin_lock(&adapter->stats_lock);
457                 t3_get_fw_version(adapter, &e->fw_vers);
458                 t3_get_tp_version(adapter, &e->tp_vers);
459                 spin_unlock(&adapter->stats_lock);
460                 break;
461         }
462         default:
463                 return -EOPNOTSUPP;
464         }
465         return 0;
466 }
467
468 /*
469  * Dummy handler for Rx offload packets in case we get an offload packet before
470  * proper processing is setup.  This complains and drops the packet as it isn't
471  * normal to get offload packets at this stage.
472  */
473 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
474                                 int n)
475 {
476         while (n--)
477                 dev_kfree_skb_any(skbs[n]);
478         return 0;
479 }
480
481 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
482 {
483 }
484
485 void cxgb3_set_dummy_ops(struct t3cdev *dev)
486 {
487         dev->recv = rx_offload_blackhole;
488         dev->neigh_update = dummy_neigh_update;
489 }
490
491 /*
492  * Free an active-open TID.
493  */
494 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
495 {
496         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
497         union active_open_entry *p = atid2entry(t, atid);
498         void *ctx = p->t3c_tid.ctx;
499
500         spin_lock_bh(&t->atid_lock);
501         p->next = t->afree;
502         t->afree = p;
503         t->atids_in_use--;
504         spin_unlock_bh(&t->atid_lock);
505
506         return ctx;
507 }
508
509 EXPORT_SYMBOL(cxgb3_free_atid);
510
511 /*
512  * Free a server TID and return it to the free pool.
513  */
514 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
515 {
516         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
517         union listen_entry *p = stid2entry(t, stid);
518
519         spin_lock_bh(&t->stid_lock);
520         p->next = t->sfree;
521         t->sfree = p;
522         t->stids_in_use--;
523         spin_unlock_bh(&t->stid_lock);
524 }
525
526 EXPORT_SYMBOL(cxgb3_free_stid);
527
528 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
529                       void *ctx, unsigned int tid)
530 {
531         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
532
533         t->tid_tab[tid].client = client;
534         t->tid_tab[tid].ctx = ctx;
535         atomic_inc(&t->tids_in_use);
536 }
537
538 EXPORT_SYMBOL(cxgb3_insert_tid);
539
540 /*
541  * Populate a TID_RELEASE WR.  The skb must be already propely sized.
542  */
543 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
544 {
545         struct cpl_tid_release *req;
546
547         skb->priority = CPL_PRIORITY_SETUP;
548         req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
549         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
550         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
551 }
552
553 static void t3_process_tid_release_list(struct work_struct *work)
554 {
555         struct t3c_data *td = container_of(work, struct t3c_data,
556                                            tid_release_task);
557         struct sk_buff *skb;
558         struct t3cdev *tdev = td->dev;
559
560
561         spin_lock_bh(&td->tid_release_lock);
562         while (td->tid_release_list) {
563                 struct t3c_tid_entry *p = td->tid_release_list;
564
565                 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
566                 spin_unlock_bh(&td->tid_release_lock);
567
568                 skb = alloc_skb(sizeof(struct cpl_tid_release),
569                                 GFP_KERNEL | __GFP_NOFAIL);
570                 mk_tid_release(skb, p - td->tid_maps.tid_tab);
571                 cxgb3_ofld_send(tdev, skb);
572                 p->ctx = NULL;
573                 spin_lock_bh(&td->tid_release_lock);
574         }
575         spin_unlock_bh(&td->tid_release_lock);
576 }
577
578 /* use ctx as a next pointer in the tid release list */
579 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
580 {
581         struct t3c_data *td = T3C_DATA(tdev);
582         struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
583
584         spin_lock_bh(&td->tid_release_lock);
585         p->ctx = (void *)td->tid_release_list;
586         p->client = NULL;
587         td->tid_release_list = p;
588         if (!p->ctx)
589                 schedule_work(&td->tid_release_task);
590         spin_unlock_bh(&td->tid_release_lock);
591 }
592
593 EXPORT_SYMBOL(cxgb3_queue_tid_release);
594
595 /*
596  * Remove a tid from the TID table.  A client may defer processing its last
597  * CPL message if it is locked at the time it arrives, and while the message
598  * sits in the client's backlog the TID may be reused for another connection.
599  * To handle this we atomically switch the TID association if it still points
600  * to the original client context.
601  */
602 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
603 {
604         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
605
606         BUG_ON(tid >= t->ntids);
607         if (tdev->type == T3A)
608                 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
609         else {
610                 struct sk_buff *skb;
611
612                 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
613                 if (likely(skb)) {
614                         mk_tid_release(skb, tid);
615                         cxgb3_ofld_send(tdev, skb);
616                         t->tid_tab[tid].ctx = NULL;
617                 } else
618                         cxgb3_queue_tid_release(tdev, tid);
619         }
620         atomic_dec(&t->tids_in_use);
621 }
622
623 EXPORT_SYMBOL(cxgb3_remove_tid);
624
625 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
626                      void *ctx)
627 {
628         int atid = -1;
629         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
630
631         spin_lock_bh(&t->atid_lock);
632         if (t->afree &&
633             t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
634             t->ntids) {
635                 union active_open_entry *p = t->afree;
636
637                 atid = (p - t->atid_tab) + t->atid_base;
638                 t->afree = p->next;
639                 p->t3c_tid.ctx = ctx;
640                 p->t3c_tid.client = client;
641                 t->atids_in_use++;
642         }
643         spin_unlock_bh(&t->atid_lock);
644         return atid;
645 }
646
647 EXPORT_SYMBOL(cxgb3_alloc_atid);
648
649 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
650                      void *ctx)
651 {
652         int stid = -1;
653         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
654
655         spin_lock_bh(&t->stid_lock);
656         if (t->sfree) {
657                 union listen_entry *p = t->sfree;
658
659                 stid = (p - t->stid_tab) + t->stid_base;
660                 t->sfree = p->next;
661                 p->t3c_tid.ctx = ctx;
662                 p->t3c_tid.client = client;
663                 t->stids_in_use++;
664         }
665         spin_unlock_bh(&t->stid_lock);
666         return stid;
667 }
668
669 EXPORT_SYMBOL(cxgb3_alloc_stid);
670
671 /* Get the t3cdev associated with a net_device */
672 struct t3cdev *dev2t3cdev(struct net_device *dev)
673 {
674         const struct port_info *pi = netdev_priv(dev);
675
676         return (struct t3cdev *)pi->adapter;
677 }
678
679 EXPORT_SYMBOL(dev2t3cdev);
680
681 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
682 {
683         struct cpl_smt_write_rpl *rpl = cplhdr(skb);
684
685         if (rpl->status != CPL_ERR_NONE)
686                 printk(KERN_ERR
687                        "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
688                        rpl->status, GET_TID(rpl));
689
690         return CPL_RET_BUF_DONE;
691 }
692
693 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
694 {
695         struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
696
697         if (rpl->status != CPL_ERR_NONE)
698                 printk(KERN_ERR
699                        "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
700                        rpl->status, GET_TID(rpl));
701
702         return CPL_RET_BUF_DONE;
703 }
704
705 static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
706 {
707         struct cpl_rte_write_rpl *rpl = cplhdr(skb);
708
709         if (rpl->status != CPL_ERR_NONE)
710                 printk(KERN_ERR
711                        "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
712                        rpl->status, GET_TID(rpl));
713
714         return CPL_RET_BUF_DONE;
715 }
716
717 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
718 {
719         struct cpl_act_open_rpl *rpl = cplhdr(skb);
720         unsigned int atid = G_TID(ntohl(rpl->atid));
721         struct t3c_tid_entry *t3c_tid;
722
723         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
724         if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
725             t3c_tid->client->handlers &&
726             t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
727                 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
728                                                                     t3c_tid->
729                                                                     ctx);
730         } else {
731                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
732                        dev->name, CPL_ACT_OPEN_RPL);
733                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
734         }
735 }
736
737 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
738 {
739         union opcode_tid *p = cplhdr(skb);
740         unsigned int stid = G_TID(ntohl(p->opcode_tid));
741         struct t3c_tid_entry *t3c_tid;
742
743         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
744         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
745             t3c_tid->client->handlers[p->opcode]) {
746                 return t3c_tid->client->handlers[p->opcode] (dev, skb,
747                                                              t3c_tid->ctx);
748         } else {
749                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
750                        dev->name, p->opcode);
751                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
752         }
753 }
754
755 static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
756 {
757         union opcode_tid *p = cplhdr(skb);
758         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
759         struct t3c_tid_entry *t3c_tid;
760
761         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
762         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
763             t3c_tid->client->handlers[p->opcode]) {
764                 return t3c_tid->client->handlers[p->opcode]
765                     (dev, skb, t3c_tid->ctx);
766         } else {
767                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
768                        dev->name, p->opcode);
769                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
770         }
771 }
772
773 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
774 {
775         struct cpl_pass_accept_req *req = cplhdr(skb);
776         unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
777         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
778         struct t3c_tid_entry *t3c_tid;
779         unsigned int tid = GET_TID(req);
780
781         if (unlikely(tid >= t->ntids)) {
782                 printk("%s: passive open TID %u too large\n",
783                        dev->name, tid);
784                 t3_fatal_err(tdev2adap(dev));
785                 return CPL_RET_BUF_DONE;
786         }
787
788         t3c_tid = lookup_stid(t, stid);
789         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
790             t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
791                 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
792                     (dev, skb, t3c_tid->ctx);
793         } else {
794                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
795                        dev->name, CPL_PASS_ACCEPT_REQ);
796                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
797         }
798 }
799
800 /*
801  * Returns an sk_buff for a reply CPL message of size len.  If the input
802  * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
803  * is allocated.  The input skb must be of size at least len.  Note that this
804  * operation does not destroy the original skb data even if it decides to reuse
805  * the buffer.
806  */
807 static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
808                                                gfp_t gfp)
809 {
810         if (likely(!skb_cloned(skb))) {
811                 BUG_ON(skb->len < len);
812                 __skb_trim(skb, len);
813                 skb_get(skb);
814         } else {
815                 skb = alloc_skb(len, gfp);
816                 if (skb)
817                         __skb_put(skb, len);
818         }
819         return skb;
820 }
821
822 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
823 {
824         union opcode_tid *p = cplhdr(skb);
825         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
826         struct t3c_tid_entry *t3c_tid;
827
828         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
829         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
830             t3c_tid->client->handlers[p->opcode]) {
831                 return t3c_tid->client->handlers[p->opcode]
832                     (dev, skb, t3c_tid->ctx);
833         } else {
834                 struct cpl_abort_req_rss *req = cplhdr(skb);
835                 struct cpl_abort_rpl *rpl;
836                 struct sk_buff *reply_skb;
837                 unsigned int tid = GET_TID(req);
838                 u8 cmd = req->status;
839
840                 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
841                     req->status == CPL_ERR_PERSIST_NEG_ADVICE)
842                         goto out;
843
844                 reply_skb = cxgb3_get_cpl_reply_skb(skb,
845                                                     sizeof(struct
846                                                            cpl_abort_rpl),
847                                                     GFP_ATOMIC);
848
849                 if (!reply_skb) {
850                         printk("do_abort_req_rss: couldn't get skb!\n");
851                         goto out;
852                 }
853                 reply_skb->priority = CPL_PRIORITY_DATA;
854                 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
855                 rpl = cplhdr(reply_skb);
856                 rpl->wr.wr_hi =
857                     htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
858                 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
859                 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
860                 rpl->cmd = cmd;
861                 cxgb3_ofld_send(dev, reply_skb);
862 out:
863                 return CPL_RET_BUF_DONE;
864         }
865 }
866
867 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
868 {
869         struct cpl_act_establish *req = cplhdr(skb);
870         unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
871         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
872         struct t3c_tid_entry *t3c_tid;
873         unsigned int tid = GET_TID(req);
874
875         if (unlikely(tid >= t->ntids)) {
876                 printk("%s: active establish TID %u too large\n",
877                        dev->name, tid);
878                 t3_fatal_err(tdev2adap(dev));
879                 return CPL_RET_BUF_DONE;
880         }
881
882         t3c_tid = lookup_atid(t, atid);
883         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
884             t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
885                 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
886                     (dev, skb, t3c_tid->ctx);
887         } else {
888                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
889                        dev->name, CPL_ACT_ESTABLISH);
890                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
891         }
892 }
893
894 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
895 {
896         struct cpl_trace_pkt *p = cplhdr(skb);
897
898         skb->protocol = htons(0xffff);
899         skb->dev = dev->lldev;
900         skb_pull(skb, sizeof(*p));
901         skb_reset_mac_header(skb);
902         netif_receive_skb(skb);
903         return 0;
904 }
905
906 /*
907  * That skb would better have come from process_responses() where we abuse
908  * ->priority and ->csum to carry our data.  NB: if we get to per-arch
909  * ->csum, the things might get really interesting here.
910  */
911
912 static inline u32 get_hwtid(struct sk_buff *skb)
913 {
914         return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
915 }
916
917 static inline u32 get_opcode(struct sk_buff *skb)
918 {
919         return G_OPCODE(ntohl((__force __be32)skb->csum));
920 }
921
922 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
923 {
924         unsigned int hwtid = get_hwtid(skb);
925         unsigned int opcode = get_opcode(skb);
926         struct t3c_tid_entry *t3c_tid;
927
928         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
929         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
930             t3c_tid->client->handlers[opcode]) {
931                 return t3c_tid->client->handlers[opcode] (dev, skb,
932                                                           t3c_tid->ctx);
933         } else {
934                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
935                        dev->name, opcode);
936                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
937         }
938 }
939
940 static int nb_callback(struct notifier_block *self, unsigned long event,
941                        void *ctx)
942 {
943         switch (event) {
944         case (NETEVENT_NEIGH_UPDATE):{
945                 cxgb_neigh_update((struct neighbour *)ctx);
946                 break;
947         }
948         case (NETEVENT_PMTU_UPDATE):
949                 break;
950         case (NETEVENT_REDIRECT):{
951                 struct netevent_redirect *nr = ctx;
952                 cxgb_redirect(nr->old, nr->new);
953                 cxgb_neigh_update(nr->new->neighbour);
954                 break;
955         }
956         default:
957                 break;
958         }
959         return 0;
960 }
961
962 static struct notifier_block nb = {
963         .notifier_call = nb_callback
964 };
965
966 /*
967  * Process a received packet with an unknown/unexpected CPL opcode.
968  */
969 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
970 {
971         printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
972                *skb->data);
973         return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
974 }
975
976 /*
977  * Handlers for each CPL opcode
978  */
979 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
980
981 /*
982  * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
983  * to unregister an existing handler.
984  */
985 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
986 {
987         if (opcode < NUM_CPL_CMDS)
988                 cpl_handlers[opcode] = h ? h : do_bad_cpl;
989         else
990                 printk(KERN_ERR "T3C: handler registration for "
991                        "opcode %x failed\n", opcode);
992 }
993
994 EXPORT_SYMBOL(t3_register_cpl_handler);
995
996 /*
997  * T3CDEV's receive method.
998  */
999 int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
1000 {
1001         while (n--) {
1002                 struct sk_buff *skb = *skbs++;
1003                 unsigned int opcode = get_opcode(skb);
1004                 int ret = cpl_handlers[opcode] (dev, skb);
1005
1006 #if VALIDATE_TID
1007                 if (ret & CPL_RET_UNKNOWN_TID) {
1008                         union opcode_tid *p = cplhdr(skb);
1009
1010                         printk(KERN_ERR "%s: CPL message (opcode %u) had "
1011                                "unknown TID %u\n", dev->name, opcode,
1012                                G_TID(ntohl(p->opcode_tid)));
1013                 }
1014 #endif
1015                 if (ret & CPL_RET_BUF_DONE)
1016                         kfree_skb(skb);
1017         }
1018         return 0;
1019 }
1020
1021 /*
1022  * Sends an sk_buff to a T3C driver after dealing with any active network taps.
1023  */
1024 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
1025 {
1026         int r;
1027
1028         local_bh_disable();
1029         r = dev->send(dev, skb);
1030         local_bh_enable();
1031         return r;
1032 }
1033
1034 EXPORT_SYMBOL(cxgb3_ofld_send);
1035
1036 static int is_offloading(struct net_device *dev)
1037 {
1038         struct adapter *adapter;
1039         int i;
1040
1041         read_lock_bh(&adapter_list_lock);
1042         list_for_each_entry(adapter, &adapter_list, adapter_list) {
1043                 for_each_port(adapter, i) {
1044                         if (dev == adapter->port[i]) {
1045                                 read_unlock_bh(&adapter_list_lock);
1046                                 return 1;
1047                         }
1048                 }
1049         }
1050         read_unlock_bh(&adapter_list_lock);
1051         return 0;
1052 }
1053
1054 void cxgb_neigh_update(struct neighbour *neigh)
1055 {
1056         struct net_device *dev = neigh->dev;
1057
1058         if (dev && (is_offloading(dev))) {
1059                 struct t3cdev *tdev = dev2t3cdev(dev);
1060
1061                 BUG_ON(!tdev);
1062                 t3_l2t_update(tdev, neigh);
1063         }
1064 }
1065
1066 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
1067 {
1068         struct sk_buff *skb;
1069         struct cpl_set_tcb_field *req;
1070
1071         skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
1072         if (!skb) {
1073                 printk(KERN_ERR "%s: cannot allocate skb!\n", __func__);
1074                 return;
1075         }
1076         skb->priority = CPL_PRIORITY_CONTROL;
1077         req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
1078         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1079         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1080         req->reply = 0;
1081         req->cpu_idx = 0;
1082         req->word = htons(W_TCB_L2T_IX);
1083         req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
1084         req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
1085         tdev->send(tdev, skb);
1086 }
1087
1088 void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
1089 {
1090         struct net_device *olddev, *newdev;
1091         struct tid_info *ti;
1092         struct t3cdev *tdev;
1093         u32 tid;
1094         int update_tcb;
1095         struct l2t_entry *e;
1096         struct t3c_tid_entry *te;
1097
1098         olddev = old->neighbour->dev;
1099         newdev = new->neighbour->dev;
1100         if (!is_offloading(olddev))
1101                 return;
1102         if (!is_offloading(newdev)) {
1103                 printk(KERN_WARNING "%s: Redirect to non-offload "
1104                        "device ignored.\n", __func__);
1105                 return;
1106         }
1107         tdev = dev2t3cdev(olddev);
1108         BUG_ON(!tdev);
1109         if (tdev != dev2t3cdev(newdev)) {
1110                 printk(KERN_WARNING "%s: Redirect to different "
1111                        "offload device ignored.\n", __func__);
1112                 return;
1113         }
1114
1115         /* Add new L2T entry */
1116         e = t3_l2t_get(tdev, new->neighbour, newdev);
1117         if (!e) {
1118                 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
1119                        __func__);
1120                 return;
1121         }
1122
1123         /* Walk tid table and notify clients of dst change. */
1124         ti = &(T3C_DATA(tdev))->tid_maps;
1125         for (tid = 0; tid < ti->ntids; tid++) {
1126                 te = lookup_tid(ti, tid);
1127                 BUG_ON(!te);
1128                 if (te && te->ctx && te->client && te->client->redirect) {
1129                         update_tcb = te->client->redirect(te->ctx, old, new, e);
1130                         if (update_tcb) {
1131                                 l2t_hold(L2DATA(tdev), e);
1132                                 set_l2t_ix(tdev, tid, e);
1133                         }
1134                 }
1135         }
1136         l2t_release(L2DATA(tdev), e);
1137 }
1138
1139 /*
1140  * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1141  * The allocated memory is cleared.
1142  */
1143 void *cxgb_alloc_mem(unsigned long size)
1144 {
1145         void *p = kmalloc(size, GFP_KERNEL);
1146
1147         if (!p)
1148                 p = vmalloc(size);
1149         if (p)
1150                 memset(p, 0, size);
1151         return p;
1152 }
1153
1154 /*
1155  * Free memory allocated through t3_alloc_mem().
1156  */
1157 void cxgb_free_mem(void *addr)
1158 {
1159         if (is_vmalloc_addr(addr))
1160                 vfree(addr);
1161         else
1162                 kfree(addr);
1163 }
1164
1165 /*
1166  * Allocate and initialize the TID tables.  Returns 0 on success.
1167  */
1168 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1169                          unsigned int natids, unsigned int nstids,
1170                          unsigned int atid_base, unsigned int stid_base)
1171 {
1172         unsigned long size = ntids * sizeof(*t->tid_tab) +
1173             natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1174
1175         t->tid_tab = cxgb_alloc_mem(size);
1176         if (!t->tid_tab)
1177                 return -ENOMEM;
1178
1179         t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1180         t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1181         t->ntids = ntids;
1182         t->nstids = nstids;
1183         t->stid_base = stid_base;
1184         t->sfree = NULL;
1185         t->natids = natids;
1186         t->atid_base = atid_base;
1187         t->afree = NULL;
1188         t->stids_in_use = t->atids_in_use = 0;
1189         atomic_set(&t->tids_in_use, 0);
1190         spin_lock_init(&t->stid_lock);
1191         spin_lock_init(&t->atid_lock);
1192
1193         /*
1194          * Setup the free lists for stid_tab and atid_tab.
1195          */
1196         if (nstids) {
1197                 while (--nstids)
1198                         t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1199                 t->sfree = t->stid_tab;
1200         }
1201         if (natids) {
1202                 while (--natids)
1203                         t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1204                 t->afree = t->atid_tab;
1205         }
1206         return 0;
1207 }
1208
1209 static void free_tid_maps(struct tid_info *t)
1210 {
1211         cxgb_free_mem(t->tid_tab);
1212 }
1213
1214 static inline void add_adapter(struct adapter *adap)
1215 {
1216         write_lock_bh(&adapter_list_lock);
1217         list_add_tail(&adap->adapter_list, &adapter_list);
1218         write_unlock_bh(&adapter_list_lock);
1219 }
1220
1221 static inline void remove_adapter(struct adapter *adap)
1222 {
1223         write_lock_bh(&adapter_list_lock);
1224         list_del(&adap->adapter_list);
1225         write_unlock_bh(&adapter_list_lock);
1226 }
1227
1228 int cxgb3_offload_activate(struct adapter *adapter)
1229 {
1230         struct t3cdev *dev = &adapter->tdev;
1231         int natids, err;
1232         struct t3c_data *t;
1233         struct tid_range stid_range, tid_range;
1234         struct mtutab mtutab;
1235         unsigned int l2t_capacity;
1236
1237         t = kcalloc(1, sizeof(*t), GFP_KERNEL);
1238         if (!t)
1239                 return -ENOMEM;
1240
1241         err = -EOPNOTSUPP;
1242         if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1243             dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1244             dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1245             dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1246             dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1247             dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1248                 goto out_free;
1249
1250         err = -ENOMEM;
1251         L2DATA(dev) = t3_init_l2t(l2t_capacity);
1252         if (!L2DATA(dev))
1253                 goto out_free;
1254
1255         natids = min(tid_range.num / 2, MAX_ATIDS);
1256         err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1257                             stid_range.num, ATID_BASE, stid_range.base);
1258         if (err)
1259                 goto out_free_l2t;
1260
1261         t->mtus = mtutab.mtus;
1262         t->nmtus = mtutab.size;
1263
1264         INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1265         spin_lock_init(&t->tid_release_lock);
1266         INIT_LIST_HEAD(&t->list_node);
1267         t->dev = dev;
1268
1269         T3C_DATA(dev) = t;
1270         dev->recv = process_rx;
1271         dev->neigh_update = t3_l2t_update;
1272
1273         /* Register netevent handler once */
1274         if (list_empty(&adapter_list))
1275                 register_netevent_notifier(&nb);
1276
1277         add_adapter(adapter);
1278         return 0;
1279
1280 out_free_l2t:
1281         t3_free_l2t(L2DATA(dev));
1282         L2DATA(dev) = NULL;
1283 out_free:
1284         kfree(t);
1285         return err;
1286 }
1287
1288 void cxgb3_offload_deactivate(struct adapter *adapter)
1289 {
1290         struct t3cdev *tdev = &adapter->tdev;
1291         struct t3c_data *t = T3C_DATA(tdev);
1292
1293         remove_adapter(adapter);
1294         if (list_empty(&adapter_list))
1295                 unregister_netevent_notifier(&nb);
1296
1297         free_tid_maps(&t->tid_maps);
1298         T3C_DATA(tdev) = NULL;
1299         t3_free_l2t(L2DATA(tdev));
1300         L2DATA(tdev) = NULL;
1301         kfree(t);
1302 }
1303
1304 static inline void register_tdev(struct t3cdev *tdev)
1305 {
1306         static int unit;
1307
1308         mutex_lock(&cxgb3_db_lock);
1309         snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1310         list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1311         mutex_unlock(&cxgb3_db_lock);
1312 }
1313
1314 static inline void unregister_tdev(struct t3cdev *tdev)
1315 {
1316         mutex_lock(&cxgb3_db_lock);
1317         list_del(&tdev->ofld_dev_list);
1318         mutex_unlock(&cxgb3_db_lock);
1319 }
1320
1321 static inline int adap2type(struct adapter *adapter)
1322 {
1323         int type = 0;
1324
1325         switch (adapter->params.rev) {
1326         case T3_REV_A:
1327                 type = T3A;
1328                 break;
1329         case T3_REV_B:
1330         case T3_REV_B2:
1331                 type = T3B;
1332                 break;
1333         case T3_REV_C:
1334                 type = T3C;
1335                 break;
1336         }
1337         return type;
1338 }
1339
1340 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1341 {
1342         struct t3cdev *tdev = &adapter->tdev;
1343
1344         INIT_LIST_HEAD(&tdev->ofld_dev_list);
1345
1346         cxgb3_set_dummy_ops(tdev);
1347         tdev->send = t3_offload_tx;
1348         tdev->ctl = cxgb_offload_ctl;
1349         tdev->type = adap2type(adapter);
1350
1351         register_tdev(tdev);
1352 }
1353
1354 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1355 {
1356         struct t3cdev *tdev = &adapter->tdev;
1357
1358         tdev->recv = NULL;
1359         tdev->neigh_update = NULL;
1360
1361         unregister_tdev(tdev);
1362 }
1363
1364 void __init cxgb3_offload_init(void)
1365 {
1366         int i;
1367
1368         for (i = 0; i < NUM_CPL_CMDS; ++i)
1369                 cpl_handlers[i] = do_bad_cpl;
1370
1371         t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1372         t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1373         t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
1374         t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1375         t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1376         t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1377         t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1378         t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1379         t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1380         t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1381         t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1382         t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1383         t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1384         t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1385         t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1386         t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1387         t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1388         t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1389         t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1390         t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1391         t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1392         t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1393         t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1394         t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1395         t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1396         t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1397 }