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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
34
35#include <linux/list.h>
36#include <linux/slab.h>
37#include <net/neighbour.h>
38#include <linux/notifier.h>
39#include <linux/atomic.h>
40#include <linux/proc_fs.h>
41#include <linux/if_vlan.h>
42#include <net/netevent.h>
43#include <linux/highmem.h>
44#include <linux/vmalloc.h>
45#include <linux/export.h>
46
47#include "common.h"
48#include "regs.h"
49#include "cxgb3_ioctl.h"
50#include "cxgb3_ctl_defs.h"
51#include "cxgb3_defs.h"
52#include "l2t.h"
53#include "firmware_exports.h"
54#include "cxgb3_offload.h"
55
56static LIST_HEAD(client_list);
57static LIST_HEAD(ofld_dev_list);
58static DEFINE_MUTEX(cxgb3_db_lock);
59
60static DEFINE_RWLOCK(adapter_list_lock);
61static LIST_HEAD(adapter_list);
62
63static const unsigned int MAX_ATIDS = 64 * 1024;
64static const unsigned int ATID_BASE = 0x10000;
65
66static void cxgb_neigh_update(struct neighbour *neigh);
67static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new,
68			  struct neighbour *neigh, const void *daddr);
69
70static inline int offload_activated(struct t3cdev *tdev)
71{
72	const struct adapter *adapter = tdev2adap(tdev);
73
74	return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
75}
76
77/**
78 *	cxgb3_register_client - register an offload client
79 *	@client: the client
80 *
81 *	Add the client to the client list,
82 *	and call backs the client for each activated offload device
83 */
84void cxgb3_register_client(struct cxgb3_client *client)
85{
86	struct t3cdev *tdev;
87
88	mutex_lock(&cxgb3_db_lock);
89	list_add_tail(&client->client_list, &client_list);
90
91	if (client->add) {
92		list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
93			if (offload_activated(tdev))
94				client->add(tdev);
95		}
96	}
97	mutex_unlock(&cxgb3_db_lock);
98}
99
100EXPORT_SYMBOL(cxgb3_register_client);
101
102/**
103 *	cxgb3_unregister_client - unregister an offload client
104 *	@client: the client
105 *
106 *	Remove the client to the client list,
107 *	and call backs the client for each activated offload device.
108 */
109void cxgb3_unregister_client(struct cxgb3_client *client)
110{
111	struct t3cdev *tdev;
112
113	mutex_lock(&cxgb3_db_lock);
114	list_del(&client->client_list);
115
116	if (client->remove) {
117		list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
118			if (offload_activated(tdev))
119				client->remove(tdev);
120		}
121	}
122	mutex_unlock(&cxgb3_db_lock);
123}
124
125EXPORT_SYMBOL(cxgb3_unregister_client);
126
127/**
128 *	cxgb3_add_clients - activate registered clients for an offload device
129 *	@tdev: the offload device
130 *
131 *	Call backs all registered clients once a offload device is activated
132 */
133void cxgb3_add_clients(struct t3cdev *tdev)
134{
135	struct cxgb3_client *client;
136
137	mutex_lock(&cxgb3_db_lock);
138	list_for_each_entry(client, &client_list, client_list) {
139		if (client->add)
140			client->add(tdev);
141	}
142	mutex_unlock(&cxgb3_db_lock);
143}
144
145/**
146 *	cxgb3_remove_clients - deactivates registered clients
147 *			       for an offload device
148 *	@tdev: the offload device
149 *
150 *	Call backs all registered clients once a offload device is deactivated
151 */
152void cxgb3_remove_clients(struct t3cdev *tdev)
153{
154	struct cxgb3_client *client;
155
156	mutex_lock(&cxgb3_db_lock);
157	list_for_each_entry(client, &client_list, client_list) {
158		if (client->remove)
159			client->remove(tdev);
160	}
161	mutex_unlock(&cxgb3_db_lock);
162}
163
164void cxgb3_event_notify(struct t3cdev *tdev, u32 event, u32 port)
165{
166	struct cxgb3_client *client;
167
168	mutex_lock(&cxgb3_db_lock);
169	list_for_each_entry(client, &client_list, client_list) {
170		if (client->event_handler)
171			client->event_handler(tdev, event, port);
172	}
173	mutex_unlock(&cxgb3_db_lock);
174}
175
176static struct net_device *get_iff_from_mac(struct adapter *adapter,
177					   const unsigned char *mac,
178					   unsigned int vlan)
179{
180	int i;
181
182	for_each_port(adapter, i) {
183		struct net_device *dev = adapter->port[i];
184
185		if (ether_addr_equal(dev->dev_addr, mac)) {
186			rcu_read_lock();
187			if (vlan && vlan != VLAN_VID_MASK) {
188				dev = __vlan_find_dev_deep_rcu(dev, htons(ETH_P_8021Q), vlan);
189			} else if (netif_is_bond_slave(dev)) {
190				struct net_device *upper_dev;
191
192				while ((upper_dev =
193					netdev_master_upper_dev_get_rcu(dev)))
194					dev = upper_dev;
195			}
196			rcu_read_unlock();
197			return dev;
198		}
199	}
200	return NULL;
201}
202
203static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
204			      void *data)
205{
206	int i;
207	int ret = 0;
208	unsigned int val = 0;
209	struct ulp_iscsi_info *uiip = data;
210
211	switch (req) {
212	case ULP_ISCSI_GET_PARAMS:
213		uiip->pdev = adapter->pdev;
214		uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
215		uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
216		uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
217
218		val = t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ);
219		for (i = 0; i < 4; i++, val >>= 8)
220			uiip->pgsz_factor[i] = val & 0xFF;
221
222		val = t3_read_reg(adapter, A_TP_PARA_REG7);
223		uiip->max_txsz =
224		uiip->max_rxsz = min((val >> S_PMMAXXFERLEN0)&M_PMMAXXFERLEN0,
225				     (val >> S_PMMAXXFERLEN1)&M_PMMAXXFERLEN1);
226		/*
227		 * On tx, the iscsi pdu has to be <= tx page size and has to
228		 * fit into the Tx PM FIFO.
229		 */
230		val = min(adapter->params.tp.tx_pg_size,
231			  t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
232		uiip->max_txsz = min(val, uiip->max_txsz);
233
234		/* set MaxRxData to 16224 */
235		val = t3_read_reg(adapter, A_TP_PARA_REG2);
236		if ((val >> S_MAXRXDATA) != 0x3f60) {
237			val &= (M_RXCOALESCESIZE << S_RXCOALESCESIZE);
238			val |= V_MAXRXDATA(0x3f60);
239			pr_info("%s, iscsi set MaxRxData to 16224 (0x%x)\n",
240				adapter->name, val);
241			t3_write_reg(adapter, A_TP_PARA_REG2, val);
242		}
243
244		/*
245		 * on rx, the iscsi pdu has to be < rx page size and the
246		 * the max rx data length programmed in TP
247		 */
248		val = min(adapter->params.tp.rx_pg_size,
249			  ((t3_read_reg(adapter, A_TP_PARA_REG2)) >>
250				S_MAXRXDATA) & M_MAXRXDATA);
251		uiip->max_rxsz = min(val, uiip->max_rxsz);
252		break;
253	case ULP_ISCSI_SET_PARAMS:
254		t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
255		/* program the ddp page sizes */
256		for (i = 0; i < 4; i++)
257			val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
258		if (val && (val != t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ))) {
259			pr_info("%s, setting iscsi pgsz 0x%x, %u,%u,%u,%u\n",
260				adapter->name, val, uiip->pgsz_factor[0],
261				uiip->pgsz_factor[1], uiip->pgsz_factor[2],
262				uiip->pgsz_factor[3]);
263			t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
264		}
265		break;
266	default:
267		ret = -EOPNOTSUPP;
268	}
269	return ret;
270}
271
272/* Response queue used for RDMA events. */
273#define ASYNC_NOTIF_RSPQ 0
274
275static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
276{
277	int ret = 0;
278
279	switch (req) {
280	case RDMA_GET_PARAMS: {
281		struct rdma_info *rdma = data;
282		struct pci_dev *pdev = adapter->pdev;
283
284		rdma->udbell_physbase = pci_resource_start(pdev, 2);
285		rdma->udbell_len = pci_resource_len(pdev, 2);
286		rdma->tpt_base =
287			t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
288		rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
289		rdma->pbl_base =
290			t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
291		rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
292		rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
293		rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
294		rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
295		rdma->pdev = pdev;
296		break;
297	}
298	case RDMA_CQ_OP:{
299		unsigned long flags;
300		struct rdma_cq_op *rdma = data;
301
302		/* may be called in any context */
303		spin_lock_irqsave(&adapter->sge.reg_lock, flags);
304		ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
305					rdma->credits);
306		spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
307		break;
308	}
309	case RDMA_GET_MEM:{
310		struct ch_mem_range *t = data;
311		struct mc7 *mem;
312
313		if ((t->addr & 7) || (t->len & 7))
314			return -EINVAL;
315		if (t->mem_id == MEM_CM)
316			mem = &adapter->cm;
317		else if (t->mem_id == MEM_PMRX)
318			mem = &adapter->pmrx;
319		else if (t->mem_id == MEM_PMTX)
320			mem = &adapter->pmtx;
321		else
322			return -EINVAL;
323
324		ret =
325			t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
326					(u64 *) t->buf);
327		if (ret)
328			return ret;
329		break;
330	}
331	case RDMA_CQ_SETUP:{
332		struct rdma_cq_setup *rdma = data;
333
334		spin_lock_irq(&adapter->sge.reg_lock);
335		ret =
336			t3_sge_init_cqcntxt(adapter, rdma->id,
337					rdma->base_addr, rdma->size,
338					ASYNC_NOTIF_RSPQ,
339					rdma->ovfl_mode, rdma->credits,
340					rdma->credit_thres);
341		spin_unlock_irq(&adapter->sge.reg_lock);
342		break;
343	}
344	case RDMA_CQ_DISABLE:
345		spin_lock_irq(&adapter->sge.reg_lock);
346		ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
347		spin_unlock_irq(&adapter->sge.reg_lock);
348		break;
349	case RDMA_CTRL_QP_SETUP:{
350		struct rdma_ctrlqp_setup *rdma = data;
351
352		spin_lock_irq(&adapter->sge.reg_lock);
353		ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
354						SGE_CNTXT_RDMA,
355						ASYNC_NOTIF_RSPQ,
356						rdma->base_addr, rdma->size,
357						FW_RI_TID_START, 1, 0);
358		spin_unlock_irq(&adapter->sge.reg_lock);
359		break;
360	}
361	case RDMA_GET_MIB: {
362		spin_lock(&adapter->stats_lock);
363		t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
364		spin_unlock(&adapter->stats_lock);
365		break;
366	}
367	default:
368		ret = -EOPNOTSUPP;
369	}
370	return ret;
371}
372
373static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
374{
375	struct adapter *adapter = tdev2adap(tdev);
376	struct tid_range *tid;
377	struct mtutab *mtup;
378	struct iff_mac *iffmacp;
379	struct ddp_params *ddpp;
380	struct adap_ports *ports;
381	struct ofld_page_info *rx_page_info;
382	struct tp_params *tp = &adapter->params.tp;
383	int i;
384
385	switch (req) {
386	case GET_MAX_OUTSTANDING_WR:
387		*(unsigned int *)data = FW_WR_NUM;
388		break;
389	case GET_WR_LEN:
390		*(unsigned int *)data = WR_FLITS;
391		break;
392	case GET_TX_MAX_CHUNK:
393		*(unsigned int *)data = 1 << 20;	/* 1MB */
394		break;
395	case GET_TID_RANGE:
396		tid = data;
397		tid->num = t3_mc5_size(&adapter->mc5) -
398		    adapter->params.mc5.nroutes -
399		    adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
400		tid->base = 0;
401		break;
402	case GET_STID_RANGE:
403		tid = data;
404		tid->num = adapter->params.mc5.nservers;
405		tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
406		    adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
407		break;
408	case GET_L2T_CAPACITY:
409		*(unsigned int *)data = 2048;
410		break;
411	case GET_MTUS:
412		mtup = data;
413		mtup->size = NMTUS;
414		mtup->mtus = adapter->params.mtus;
415		break;
416	case GET_IFF_FROM_MAC:
417		iffmacp = data;
418		iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
419						iffmacp->vlan_tag &
420						VLAN_VID_MASK);
421		break;
422	case GET_DDP_PARAMS:
423		ddpp = data;
424		ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
425		ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
426		ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
427		break;
428	case GET_PORTS:
429		ports = data;
430		ports->nports = adapter->params.nports;
431		for_each_port(adapter, i)
432			ports->lldevs[i] = adapter->port[i];
433		break;
434	case ULP_ISCSI_GET_PARAMS:
435	case ULP_ISCSI_SET_PARAMS:
436		if (!offload_running(adapter))
437			return -EAGAIN;
438		return cxgb_ulp_iscsi_ctl(adapter, req, data);
439	case RDMA_GET_PARAMS:
440	case RDMA_CQ_OP:
441	case RDMA_CQ_SETUP:
442	case RDMA_CQ_DISABLE:
443	case RDMA_CTRL_QP_SETUP:
444	case RDMA_GET_MEM:
445	case RDMA_GET_MIB:
446		if (!offload_running(adapter))
447			return -EAGAIN;
448		return cxgb_rdma_ctl(adapter, req, data);
449	case GET_RX_PAGE_INFO:
450		rx_page_info = data;
451		rx_page_info->page_size = tp->rx_pg_size;
452		rx_page_info->num = tp->rx_num_pgs;
453		break;
454	case GET_ISCSI_IPV4ADDR: {
455		struct iscsi_ipv4addr *p = data;
456		struct port_info *pi = netdev_priv(p->dev);
457		p->ipv4addr = pi->iscsi_ipv4addr;
458		break;
459	}
460	case GET_EMBEDDED_INFO: {
461		struct ch_embedded_info *e = data;
462
463		spin_lock(&adapter->stats_lock);
464		t3_get_fw_version(adapter, &e->fw_vers);
465		t3_get_tp_version(adapter, &e->tp_vers);
466		spin_unlock(&adapter->stats_lock);
467		break;
468	}
469	default:
470		return -EOPNOTSUPP;
471	}
472	return 0;
473}
474
475/*
476 * Dummy handler for Rx offload packets in case we get an offload packet before
477 * proper processing is setup.  This complains and drops the packet as it isn't
478 * normal to get offload packets at this stage.
479 */
480static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
481				int n)
482{
483	while (n--)
484		dev_kfree_skb_any(skbs[n]);
485	return 0;
486}
487
488static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
489{
490}
491
492void cxgb3_set_dummy_ops(struct t3cdev *dev)
493{
494	dev->recv = rx_offload_blackhole;
495	dev->neigh_update = dummy_neigh_update;
496}
497
498/*
499 * Free an active-open TID.
500 */
501void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
502{
503	struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
504	union active_open_entry *p = atid2entry(t, atid);
505	void *ctx = p->t3c_tid.ctx;
506
507	spin_lock_bh(&t->atid_lock);
508	p->next = t->afree;
509	t->afree = p;
510	t->atids_in_use--;
511	spin_unlock_bh(&t->atid_lock);
512
513	return ctx;
514}
515
516EXPORT_SYMBOL(cxgb3_free_atid);
517
518/*
519 * Free a server TID and return it to the free pool.
520 */
521void cxgb3_free_stid(struct t3cdev *tdev, int stid)
522{
523	struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
524	union listen_entry *p = stid2entry(t, stid);
525
526	spin_lock_bh(&t->stid_lock);
527	p->next = t->sfree;
528	t->sfree = p;
529	t->stids_in_use--;
530	spin_unlock_bh(&t->stid_lock);
531}
532
533EXPORT_SYMBOL(cxgb3_free_stid);
534
535void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
536		      void *ctx, unsigned int tid)
537{
538	struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
539
540	t->tid_tab[tid].client = client;
541	t->tid_tab[tid].ctx = ctx;
542	atomic_inc(&t->tids_in_use);
543}
544
545EXPORT_SYMBOL(cxgb3_insert_tid);
546
547/*
548 * Populate a TID_RELEASE WR.  The skb must be already propely sized.
549 */
550static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
551{
552	struct cpl_tid_release *req;
553
554	skb->priority = CPL_PRIORITY_SETUP;
555	req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
556	req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
557	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
558}
559
560static void t3_process_tid_release_list(struct work_struct *work)
561{
562	struct t3c_data *td = container_of(work, struct t3c_data,
563					   tid_release_task);
564	struct sk_buff *skb;
565	struct t3cdev *tdev = td->dev;
566
567
568	spin_lock_bh(&td->tid_release_lock);
569	while (td->tid_release_list) {
570		struct t3c_tid_entry *p = td->tid_release_list;
571
572		td->tid_release_list = p->ctx;
573		spin_unlock_bh(&td->tid_release_lock);
574
575		skb = alloc_skb(sizeof(struct cpl_tid_release),
576				GFP_KERNEL);
577		if (!skb)
578			skb = td->nofail_skb;
579		if (!skb) {
580			spin_lock_bh(&td->tid_release_lock);
581			p->ctx = (void *)td->tid_release_list;
582			td->tid_release_list = p;
583			break;
584		}
585		mk_tid_release(skb, p - td->tid_maps.tid_tab);
586		cxgb3_ofld_send(tdev, skb);
587		p->ctx = NULL;
588		if (skb == td->nofail_skb)
589			td->nofail_skb =
590				alloc_skb(sizeof(struct cpl_tid_release),
591					GFP_KERNEL);
592		spin_lock_bh(&td->tid_release_lock);
593	}
594	td->release_list_incomplete = (td->tid_release_list == NULL) ? 0 : 1;
595	spin_unlock_bh(&td->tid_release_lock);
596
597	if (!td->nofail_skb)
598		td->nofail_skb =
599			alloc_skb(sizeof(struct cpl_tid_release),
600				GFP_KERNEL);
601}
602
603/* use ctx as a next pointer in the tid release list */
604void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
605{
606	struct t3c_data *td = T3C_DATA(tdev);
607	struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
608
609	spin_lock_bh(&td->tid_release_lock);
610	p->ctx = (void *)td->tid_release_list;
611	p->client = NULL;
612	td->tid_release_list = p;
613	if (!p->ctx || td->release_list_incomplete)
614		schedule_work(&td->tid_release_task);
615	spin_unlock_bh(&td->tid_release_lock);
616}
617
618EXPORT_SYMBOL(cxgb3_queue_tid_release);
619
620/*
621 * Remove a tid from the TID table.  A client may defer processing its last
622 * CPL message if it is locked at the time it arrives, and while the message
623 * sits in the client's backlog the TID may be reused for another connection.
624 * To handle this we atomically switch the TID association if it still points
625 * to the original client context.
626 */
627void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
628{
629	struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
630
631	BUG_ON(tid >= t->ntids);
632	if (tdev->type == T3A)
633		(void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
634	else {
635		struct sk_buff *skb;
636
637		skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
638		if (likely(skb)) {
639			mk_tid_release(skb, tid);
640			cxgb3_ofld_send(tdev, skb);
641			t->tid_tab[tid].ctx = NULL;
642		} else
643			cxgb3_queue_tid_release(tdev, tid);
644	}
645	atomic_dec(&t->tids_in_use);
646}
647
648EXPORT_SYMBOL(cxgb3_remove_tid);
649
650int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
651		     void *ctx)
652{
653	int atid = -1;
654	struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
655
656	spin_lock_bh(&t->atid_lock);
657	if (t->afree &&
658	    t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
659	    t->ntids) {
660		union active_open_entry *p = t->afree;
661
662		atid = (p - t->atid_tab) + t->atid_base;
663		t->afree = p->next;
664		p->t3c_tid.ctx = ctx;
665		p->t3c_tid.client = client;
666		t->atids_in_use++;
667	}
668	spin_unlock_bh(&t->atid_lock);
669	return atid;
670}
671
672EXPORT_SYMBOL(cxgb3_alloc_atid);
673
674int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
675		     void *ctx)
676{
677	int stid = -1;
678	struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
679
680	spin_lock_bh(&t->stid_lock);
681	if (t->sfree) {
682		union listen_entry *p = t->sfree;
683
684		stid = (p - t->stid_tab) + t->stid_base;
685		t->sfree = p->next;
686		p->t3c_tid.ctx = ctx;
687		p->t3c_tid.client = client;
688		t->stids_in_use++;
689	}
690	spin_unlock_bh(&t->stid_lock);
691	return stid;
692}
693
694EXPORT_SYMBOL(cxgb3_alloc_stid);
695
696/* Get the t3cdev associated with a net_device */
697struct t3cdev *dev2t3cdev(struct net_device *dev)
698{
699	const struct port_info *pi = netdev_priv(dev);
700
701	return (struct t3cdev *)pi->adapter;
702}
703
704EXPORT_SYMBOL(dev2t3cdev);
705
706static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
707{
708	struct cpl_smt_write_rpl *rpl = cplhdr(skb);
709
710	if (rpl->status != CPL_ERR_NONE)
711		pr_err("Unexpected SMT_WRITE_RPL status %u for entry %u\n",
712		       rpl->status, GET_TID(rpl));
713
714	return CPL_RET_BUF_DONE;
715}
716
717static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
718{
719	struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
720
721	if (rpl->status != CPL_ERR_NONE)
722		pr_err("Unexpected L2T_WRITE_RPL status %u for entry %u\n",
723		       rpl->status, GET_TID(rpl));
724
725	return CPL_RET_BUF_DONE;
726}
727
728static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
729{
730	struct cpl_rte_write_rpl *rpl = cplhdr(skb);
731
732	if (rpl->status != CPL_ERR_NONE)
733		pr_err("Unexpected RTE_WRITE_RPL status %u for entry %u\n",
734		       rpl->status, GET_TID(rpl));
735
736	return CPL_RET_BUF_DONE;
737}
738
739static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
740{
741	struct cpl_act_open_rpl *rpl = cplhdr(skb);
742	unsigned int atid = G_TID(ntohl(rpl->atid));
743	struct t3c_tid_entry *t3c_tid;
744
745	t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
746	if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
747	    t3c_tid->client->handlers &&
748	    t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
749		return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
750								    t3c_tid->
751								    ctx);
752	} else {
753		pr_err("%s: received clientless CPL command 0x%x\n",
754		       dev->name, CPL_ACT_OPEN_RPL);
755		return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
756	}
757}
758
759static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
760{
761	union opcode_tid *p = cplhdr(skb);
762	unsigned int stid = G_TID(ntohl(p->opcode_tid));
763	struct t3c_tid_entry *t3c_tid;
764
765	t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
766	if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
767	    t3c_tid->client->handlers[p->opcode]) {
768		return t3c_tid->client->handlers[p->opcode] (dev, skb,
769							     t3c_tid->ctx);
770	} else {
771		pr_err("%s: received clientless CPL command 0x%x\n",
772		       dev->name, p->opcode);
773		return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
774	}
775}
776
777static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
778{
779	union opcode_tid *p = cplhdr(skb);
780	unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
781	struct t3c_tid_entry *t3c_tid;
782
783	t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
784	if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
785	    t3c_tid->client->handlers[p->opcode]) {
786		return t3c_tid->client->handlers[p->opcode]
787		    (dev, skb, t3c_tid->ctx);
788	} else {
789		pr_err("%s: received clientless CPL command 0x%x\n",
790		       dev->name, p->opcode);
791		return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
792	}
793}
794
795static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
796{
797	struct cpl_pass_accept_req *req = cplhdr(skb);
798	unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
799	struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
800	struct t3c_tid_entry *t3c_tid;
801	unsigned int tid = GET_TID(req);
802
803	if (unlikely(tid >= t->ntids)) {
804		printk("%s: passive open TID %u too large\n",
805		       dev->name, tid);
806		t3_fatal_err(tdev2adap(dev));
807		return CPL_RET_BUF_DONE;
808	}
809
810	t3c_tid = lookup_stid(t, stid);
811	if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
812	    t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
813		return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
814		    (dev, skb, t3c_tid->ctx);
815	} else {
816		pr_err("%s: received clientless CPL command 0x%x\n",
817		       dev->name, CPL_PASS_ACCEPT_REQ);
818		return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
819	}
820}
821
822/*
823 * Returns an sk_buff for a reply CPL message of size len.  If the input
824 * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
825 * is allocated.  The input skb must be of size at least len.  Note that this
826 * operation does not destroy the original skb data even if it decides to reuse
827 * the buffer.
828 */
829static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
830					       gfp_t gfp)
831{
832	if (likely(!skb_cloned(skb))) {
833		BUG_ON(skb->len < len);
834		__skb_trim(skb, len);
835		skb_get(skb);
836	} else {
837		skb = alloc_skb(len, gfp);
838		if (skb)
839			__skb_put(skb, len);
840	}
841	return skb;
842}
843
844static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
845{
846	union opcode_tid *p = cplhdr(skb);
847	unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
848	struct t3c_tid_entry *t3c_tid;
849
850	t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
851	if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
852	    t3c_tid->client->handlers[p->opcode]) {
853		return t3c_tid->client->handlers[p->opcode]
854		    (dev, skb, t3c_tid->ctx);
855	} else {
856		struct cpl_abort_req_rss *req = cplhdr(skb);
857		struct cpl_abort_rpl *rpl;
858		struct sk_buff *reply_skb;
859		unsigned int tid = GET_TID(req);
860		u8 cmd = req->status;
861
862		if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
863		    req->status == CPL_ERR_PERSIST_NEG_ADVICE)
864			goto out;
865
866		reply_skb = cxgb3_get_cpl_reply_skb(skb,
867						    sizeof(struct
868							   cpl_abort_rpl),
869						    GFP_ATOMIC);
870
871		if (!reply_skb) {
872			printk("do_abort_req_rss: couldn't get skb!\n");
873			goto out;
874		}
875		reply_skb->priority = CPL_PRIORITY_DATA;
876		__skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
877		rpl = cplhdr(reply_skb);
878		rpl->wr.wr_hi =
879		    htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
880		rpl->wr.wr_lo = htonl(V_WR_TID(tid));
881		OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
882		rpl->cmd = cmd;
883		cxgb3_ofld_send(dev, reply_skb);
884out:
885		return CPL_RET_BUF_DONE;
886	}
887}
888
889static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
890{
891	struct cpl_act_establish *req = cplhdr(skb);
892	unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
893	struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
894	struct t3c_tid_entry *t3c_tid;
895	unsigned int tid = GET_TID(req);
896
897	if (unlikely(tid >= t->ntids)) {
898		printk("%s: active establish TID %u too large\n",
899		       dev->name, tid);
900		t3_fatal_err(tdev2adap(dev));
901		return CPL_RET_BUF_DONE;
902	}
903
904	t3c_tid = lookup_atid(t, atid);
905	if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
906	    t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
907		return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
908		    (dev, skb, t3c_tid->ctx);
909	} else {
910		pr_err("%s: received clientless CPL command 0x%x\n",
911		       dev->name, CPL_ACT_ESTABLISH);
912		return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
913	}
914}
915
916static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
917{
918	struct cpl_trace_pkt *p = cplhdr(skb);
919
920	skb->protocol = htons(0xffff);
921	skb->dev = dev->lldev;
922	skb_pull(skb, sizeof(*p));
923	skb_reset_mac_header(skb);
924	netif_receive_skb(skb);
925	return 0;
926}
927
928/*
929 * That skb would better have come from process_responses() where we abuse
930 * ->priority and ->csum to carry our data.  NB: if we get to per-arch
931 * ->csum, the things might get really interesting here.
932 */
933
934static inline u32 get_hwtid(struct sk_buff *skb)
935{
936	return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
937}
938
939static inline u32 get_opcode(struct sk_buff *skb)
940{
941	return G_OPCODE(ntohl((__force __be32)skb->csum));
942}
943
944static int do_term(struct t3cdev *dev, struct sk_buff *skb)
945{
946	unsigned int hwtid = get_hwtid(skb);
947	unsigned int opcode = get_opcode(skb);
948	struct t3c_tid_entry *t3c_tid;
949
950	t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
951	if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
952	    t3c_tid->client->handlers[opcode]) {
953		return t3c_tid->client->handlers[opcode] (dev, skb,
954							  t3c_tid->ctx);
955	} else {
956		pr_err("%s: received clientless CPL command 0x%x\n",
957		       dev->name, opcode);
958		return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
959	}
960}
961
962static int nb_callback(struct notifier_block *self, unsigned long event,
963		       void *ctx)
964{
965	switch (event) {
966	case (NETEVENT_NEIGH_UPDATE):{
967		cxgb_neigh_update((struct neighbour *)ctx);
968		break;
969	}
970	case (NETEVENT_REDIRECT):{
971		struct netevent_redirect *nr = ctx;
972		cxgb_redirect(nr->old, nr->new, nr->neigh,
973			      nr->daddr);
974		cxgb_neigh_update(nr->neigh);
975		break;
976	}
977	default:
978		break;
979	}
980	return 0;
981}
982
983static struct notifier_block nb = {
984	.notifier_call = nb_callback
985};
986
987/*
988 * Process a received packet with an unknown/unexpected CPL opcode.
989 */
990static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
991{
992	pr_err("%s: received bad CPL command 0x%x\n", dev->name, *skb->data);
993	return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
994}
995
996/*
997 * Handlers for each CPL opcode
998 */
999static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
1000
1001/*
1002 * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
1003 * to unregister an existing handler.
1004 */
1005void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
1006{
1007	if (opcode < NUM_CPL_CMDS)
1008		cpl_handlers[opcode] = h ? h : do_bad_cpl;
1009	else
1010		pr_err("T3C: handler registration for opcode %x failed\n",
1011		       opcode);
1012}
1013
1014EXPORT_SYMBOL(t3_register_cpl_handler);
1015
1016/*
1017 * T3CDEV's receive method.
1018 */
1019static int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
1020{
1021	while (n--) {
1022		struct sk_buff *skb = *skbs++;
1023		unsigned int opcode = get_opcode(skb);
1024		int ret = cpl_handlers[opcode] (dev, skb);
1025
1026#if VALIDATE_TID
1027		if (ret & CPL_RET_UNKNOWN_TID) {
1028			union opcode_tid *p = cplhdr(skb);
1029
1030			pr_err("%s: CPL message (opcode %u) had unknown TID %u\n",
1031			       dev->name, opcode, G_TID(ntohl(p->opcode_tid)));
1032		}
1033#endif
1034		if (ret & CPL_RET_BUF_DONE)
1035			kfree_skb(skb);
1036	}
1037	return 0;
1038}
1039
1040/*
1041 * Sends an sk_buff to a T3C driver after dealing with any active network taps.
1042 */
1043int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
1044{
1045	int r;
1046
1047	local_bh_disable();
1048	r = dev->send(dev, skb);
1049	local_bh_enable();
1050	return r;
1051}
1052
1053EXPORT_SYMBOL(cxgb3_ofld_send);
1054
1055static int is_offloading(struct net_device *dev)
1056{
1057	struct adapter *adapter;
1058	int i;
1059
1060	read_lock_bh(&adapter_list_lock);
1061	list_for_each_entry(adapter, &adapter_list, adapter_list) {
1062		for_each_port(adapter, i) {
1063			if (dev == adapter->port[i]) {
1064				read_unlock_bh(&adapter_list_lock);
1065				return 1;
1066			}
1067		}
1068	}
1069	read_unlock_bh(&adapter_list_lock);
1070	return 0;
1071}
1072
1073static void cxgb_neigh_update(struct neighbour *neigh)
1074{
1075	struct net_device *dev;
1076
1077	if (!neigh)
1078		return;
1079	dev = neigh->dev;
1080	if (dev && (is_offloading(dev))) {
1081		struct t3cdev *tdev = dev2t3cdev(dev);
1082
1083		BUG_ON(!tdev);
1084		t3_l2t_update(tdev, neigh);
1085	}
1086}
1087
1088static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
1089{
1090	struct sk_buff *skb;
1091	struct cpl_set_tcb_field *req;
1092
1093	skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
1094	if (!skb) {
1095		pr_err("%s: cannot allocate skb!\n", __func__);
1096		return;
1097	}
1098	skb->priority = CPL_PRIORITY_CONTROL;
1099	req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
1100	req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1101	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1102	req->reply = 0;
1103	req->cpu_idx = 0;
1104	req->word = htons(W_TCB_L2T_IX);
1105	req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
1106	req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
1107	tdev->send(tdev, skb);
1108}
1109
1110static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new,
1111			  struct neighbour *neigh,
1112			  const void *daddr)
1113{
1114	struct net_device *dev;
1115	struct tid_info *ti;
1116	struct t3cdev *tdev;
1117	u32 tid;
1118	int update_tcb;
1119	struct l2t_entry *e;
1120	struct t3c_tid_entry *te;
1121
1122	dev = neigh->dev;
1123
1124	if (!is_offloading(dev))
1125		return;
1126	tdev = dev2t3cdev(dev);
1127	BUG_ON(!tdev);
1128
1129	/* Add new L2T entry */
1130	e = t3_l2t_get(tdev, new, dev, daddr);
1131	if (!e) {
1132		pr_err("%s: couldn't allocate new l2t entry!\n", __func__);
1133		return;
1134	}
1135
1136	/* Walk tid table and notify clients of dst change. */
1137	ti = &(T3C_DATA(tdev))->tid_maps;
1138	for (tid = 0; tid < ti->ntids; tid++) {
1139		te = lookup_tid(ti, tid);
1140		BUG_ON(!te);
1141		if (te && te->ctx && te->client && te->client->redirect) {
1142			update_tcb = te->client->redirect(te->ctx, old, new, e);
1143			if (update_tcb) {
1144				rcu_read_lock();
1145				l2t_hold(L2DATA(tdev), e);
1146				rcu_read_unlock();
1147				set_l2t_ix(tdev, tid, e);
1148			}
1149		}
1150	}
1151	l2t_release(tdev, e);
1152}
1153
1154/*
1155 * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1156 * The allocated memory is cleared.
1157 */
1158void *cxgb_alloc_mem(unsigned long size)
1159{
1160	void *p = kzalloc(size, GFP_KERNEL | __GFP_NOWARN);
1161
1162	if (!p)
1163		p = vzalloc(size);
1164	return p;
1165}
1166
1167/*
1168 * Free memory allocated through t3_alloc_mem().
1169 */
1170void cxgb_free_mem(void *addr)
1171{
1172	if (is_vmalloc_addr(addr))
1173		vfree(addr);
1174	else
1175		kfree(addr);
1176}
1177
1178/*
1179 * Allocate and initialize the TID tables.  Returns 0 on success.
1180 */
1181static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1182			 unsigned int natids, unsigned int nstids,
1183			 unsigned int atid_base, unsigned int stid_base)
1184{
1185	unsigned long size = ntids * sizeof(*t->tid_tab) +
1186	    natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1187
1188	t->tid_tab = cxgb_alloc_mem(size);
1189	if (!t->tid_tab)
1190		return -ENOMEM;
1191
1192	t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1193	t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1194	t->ntids = ntids;
1195	t->nstids = nstids;
1196	t->stid_base = stid_base;
1197	t->sfree = NULL;
1198	t->natids = natids;
1199	t->atid_base = atid_base;
1200	t->afree = NULL;
1201	t->stids_in_use = t->atids_in_use = 0;
1202	atomic_set(&t->tids_in_use, 0);
1203	spin_lock_init(&t->stid_lock);
1204	spin_lock_init(&t->atid_lock);
1205
1206	/*
1207	 * Setup the free lists for stid_tab and atid_tab.
1208	 */
1209	if (nstids) {
1210		while (--nstids)
1211			t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1212		t->sfree = t->stid_tab;
1213	}
1214	if (natids) {
1215		while (--natids)
1216			t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1217		t->afree = t->atid_tab;
1218	}
1219	return 0;
1220}
1221
1222static void free_tid_maps(struct tid_info *t)
1223{
1224	cxgb_free_mem(t->tid_tab);
1225}
1226
1227static inline void add_adapter(struct adapter *adap)
1228{
1229	write_lock_bh(&adapter_list_lock);
1230	list_add_tail(&adap->adapter_list, &adapter_list);
1231	write_unlock_bh(&adapter_list_lock);
1232}
1233
1234static inline void remove_adapter(struct adapter *adap)
1235{
1236	write_lock_bh(&adapter_list_lock);
1237	list_del(&adap->adapter_list);
1238	write_unlock_bh(&adapter_list_lock);
1239}
1240
1241int cxgb3_offload_activate(struct adapter *adapter)
1242{
1243	struct t3cdev *dev = &adapter->tdev;
1244	int natids, err;
1245	struct t3c_data *t;
1246	struct tid_range stid_range, tid_range;
1247	struct mtutab mtutab;
1248	unsigned int l2t_capacity;
1249	struct l2t_data *l2td;
1250
1251	t = kzalloc(sizeof(*t), GFP_KERNEL);
1252	if (!t)
1253		return -ENOMEM;
1254
1255	err = -EOPNOTSUPP;
1256	if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1257	    dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1258	    dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1259	    dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1260	    dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1261	    dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1262		goto out_free;
1263
1264	err = -ENOMEM;
1265	l2td = t3_init_l2t(l2t_capacity);
1266	if (!l2td)
1267		goto out_free;
1268
1269	natids = min(tid_range.num / 2, MAX_ATIDS);
1270	err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1271			    stid_range.num, ATID_BASE, stid_range.base);
1272	if (err)
1273		goto out_free_l2t;
1274
1275	t->mtus = mtutab.mtus;
1276	t->nmtus = mtutab.size;
1277
1278	INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1279	spin_lock_init(&t->tid_release_lock);
1280	INIT_LIST_HEAD(&t->list_node);
1281	t->dev = dev;
1282
1283	RCU_INIT_POINTER(dev->l2opt, l2td);
1284	T3C_DATA(dev) = t;
1285	dev->recv = process_rx;
1286	dev->neigh_update = t3_l2t_update;
1287
1288	/* Register netevent handler once */
1289	if (list_empty(&adapter_list))
1290		register_netevent_notifier(&nb);
1291
1292	t->nofail_skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_KERNEL);
1293	t->release_list_incomplete = 0;
1294
1295	add_adapter(adapter);
1296	return 0;
1297
1298out_free_l2t:
1299	t3_free_l2t(l2td);
1300out_free:
1301	kfree(t);
1302	return err;
1303}
1304
1305static void clean_l2_data(struct rcu_head *head)
1306{
1307	struct l2t_data *d = container_of(head, struct l2t_data, rcu_head);
1308	t3_free_l2t(d);
1309}
1310
1311
1312void cxgb3_offload_deactivate(struct adapter *adapter)
1313{
1314	struct t3cdev *tdev = &adapter->tdev;
1315	struct t3c_data *t = T3C_DATA(tdev);
1316	struct l2t_data *d;
1317
1318	remove_adapter(adapter);
1319	if (list_empty(&adapter_list))
1320		unregister_netevent_notifier(&nb);
1321
1322	free_tid_maps(&t->tid_maps);
1323	T3C_DATA(tdev) = NULL;
1324	rcu_read_lock();
1325	d = L2DATA(tdev);
1326	rcu_read_unlock();
1327	RCU_INIT_POINTER(tdev->l2opt, NULL);
1328	call_rcu(&d->rcu_head, clean_l2_data);
1329	if (t->nofail_skb)
1330		kfree_skb(t->nofail_skb);
1331	kfree(t);
1332}
1333
1334static inline void register_tdev(struct t3cdev *tdev)
1335{
1336	static int unit;
1337
1338	mutex_lock(&cxgb3_db_lock);
1339	snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1340	list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1341	mutex_unlock(&cxgb3_db_lock);
1342}
1343
1344static inline void unregister_tdev(struct t3cdev *tdev)
1345{
1346	mutex_lock(&cxgb3_db_lock);
1347	list_del(&tdev->ofld_dev_list);
1348	mutex_unlock(&cxgb3_db_lock);
1349}
1350
1351static inline int adap2type(struct adapter *adapter)
1352{
1353	int type = 0;
1354
1355	switch (adapter->params.rev) {
1356	case T3_REV_A:
1357		type = T3A;
1358		break;
1359	case T3_REV_B:
1360	case T3_REV_B2:
1361		type = T3B;
1362		break;
1363	case T3_REV_C:
1364		type = T3C;
1365		break;
1366	}
1367	return type;
1368}
1369
1370void cxgb3_adapter_ofld(struct adapter *adapter)
1371{
1372	struct t3cdev *tdev = &adapter->tdev;
1373
1374	INIT_LIST_HEAD(&tdev->ofld_dev_list);
1375
1376	cxgb3_set_dummy_ops(tdev);
1377	tdev->send = t3_offload_tx;
1378	tdev->ctl = cxgb_offload_ctl;
1379	tdev->type = adap2type(adapter);
1380
1381	register_tdev(tdev);
1382}
1383
1384void cxgb3_adapter_unofld(struct adapter *adapter)
1385{
1386	struct t3cdev *tdev = &adapter->tdev;
1387
1388	tdev->recv = NULL;
1389	tdev->neigh_update = NULL;
1390
1391	unregister_tdev(tdev);
1392}
1393
1394void __init cxgb3_offload_init(void)
1395{
1396	int i;
1397
1398	for (i = 0; i < NUM_CPL_CMDS; ++i)
1399		cpl_handlers[i] = do_bad_cpl;
1400
1401	t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1402	t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1403	t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
1404	t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1405	t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1406	t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1407	t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1408	t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1409	t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1410	t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1411	t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1412	t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1413	t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1414	t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1415	t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1416	t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1417	t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1418	t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1419	t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1420	t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1421	t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1422	t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1423	t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1424	t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1425	t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1426	t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1427}
1428