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ethernet: Remove casts to same type
[deliverable/linux.git] / drivers / net / ethernet / chelsio / cxgb3 / cxgb3_offload.c
CommitLineData
4d22de3e 1/*
a02d44a0 2 * Copyright (c) 2006-2008 Chelsio, Inc. All rights reserved.
4d22de3e
DLR		 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>
5a0e3ad6 34#include <linux/slab.h>
4d22de3e
DLR		 35#include <net/neighbour.h>
36#include <linux/notifier.h>
60063497 37#include <linux/atomic.h>
4d22de3e
DLR		 38#include <linux/proc_fs.h>
39#include <linux/if_vlan.h>
40#include <net/netevent.h>
41#include <linux/highmem.h>
42#include <linux/vmalloc.h>
ee40fa06 43#include <linux/export.h>
4d22de3e
DLR		 44
45#include "common.h"
46#include "regs.h"
47#include "cxgb3_ioctl.h"
48#include "cxgb3_ctl_defs.h"
49#include "cxgb3_defs.h"
50#include "l2t.h"
51#include "firmware_exports.h"
52#include "cxgb3_offload.h"
53
54static LIST_HEAD(client_list);
55static LIST_HEAD(ofld_dev_list);
56static DEFINE_MUTEX(cxgb3_db_lock);
57
58static DEFINE_RWLOCK(adapter_list_lock);
59static LIST_HEAD(adapter_list);
60
61static const unsigned int MAX_ATIDS = 64 * 1024;
c9a6ce50 62static const unsigned int ATID_BASE = 0x10000;
4d22de3e 63
a5190b4e 64static void cxgb_neigh_update(struct neighbour *neigh);
65static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new);
66
4d22de3e
DLR		 67static inline int offload_activated(struct t3cdev *tdev)
68{
69 const struct adapter *adapter = tdev2adap(tdev);
70
807540ba 71 return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
4d22de3e
DLR		 72}
73
74/**
75 * cxgb3_register_client - register an offload client
76 * @client: the client
77 *
78 * Add the client to the client list,
79 * and call backs the client for each activated offload device
80 */
81void cxgb3_register_client(struct cxgb3_client *client)
82{
83 struct t3cdev *tdev;
84
85 mutex_lock(&cxgb3_db_lock);
86 list_add_tail(&client->client_list, &client_list);
87
88 if (client->add) {
89 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
90 if (offload_activated(tdev))
91 client->add(tdev);
92 }
93 }
94 mutex_unlock(&cxgb3_db_lock);
95}
96
97EXPORT_SYMBOL(cxgb3_register_client);
98
99/**
100 * cxgb3_unregister_client - unregister an offload client
101 * @client: the client
102 *
103 * Remove the client to the client list,
104 * and call backs the client for each activated offload device.
105 */
106void cxgb3_unregister_client(struct cxgb3_client *client)
107{
108 struct t3cdev *tdev;
109
110 mutex_lock(&cxgb3_db_lock);
111 list_del(&client->client_list);
112
113 if (client->remove) {
114 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
115 if (offload_activated(tdev))
116 client->remove(tdev);
117 }
118 }
119 mutex_unlock(&cxgb3_db_lock);
120}
121
122EXPORT_SYMBOL(cxgb3_unregister_client);
123
124/**
125 * cxgb3_add_clients - activate registered clients for an offload device
126 * @tdev: the offload device
127 *
128 * Call backs all registered clients once a offload device is activated
129 */
130void cxgb3_add_clients(struct t3cdev *tdev)
131{
132 struct cxgb3_client *client;
133
134 mutex_lock(&cxgb3_db_lock);
135 list_for_each_entry(client, &client_list, client_list) {
136 if (client->add)
137 client->add(tdev);
138 }
139 mutex_unlock(&cxgb3_db_lock);
140}
141
142/**
143 * cxgb3_remove_clients - deactivates registered clients
144 * for an offload device
145 * @tdev: the offload device
146 *
147 * Call backs all registered clients once a offload device is deactivated
148 */
149void cxgb3_remove_clients(struct t3cdev *tdev)
150{
151 struct cxgb3_client *client;
152
153 mutex_lock(&cxgb3_db_lock);
154 list_for_each_entry(client, &client_list, client_list) {
155 if (client->remove)
156 client->remove(tdev);
157 }
158 mutex_unlock(&cxgb3_db_lock);
159}
160
fa0d4c11 161void cxgb3_event_notify(struct t3cdev *tdev, u32 event, u32 port)
cb0bc205
DLR		 162{
163 struct cxgb3_client *client;
164
165 mutex_lock(&cxgb3_db_lock);
166 list_for_each_entry(client, &client_list, client_list) {
fa0d4c11
SW		 167 if (client->event_handler)
168 client->event_handler(tdev, event, port);
cb0bc205
DLR		 169 }
170 mutex_unlock(&cxgb3_db_lock);
171}
172
4d22de3e
DLR		 173static struct net_device *get_iff_from_mac(struct adapter *adapter,
174 const unsigned char *mac,
175 unsigned int vlan)
176{
177 int i;
178
179 for_each_port(adapter, i) {
4d22de3e 180 struct net_device *dev = adapter->port[i];
4d22de3e
DLR		 181
182 if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) {
183 if (vlan && vlan != VLAN_VID_MASK) {
892ef5d8
JP		 184 rcu_read_lock();
185 dev = __vlan_find_dev_deep(dev, vlan);
186 rcu_read_unlock();
1765a575 187 } else if (netif_is_bond_slave(dev)) {
4d22de3e
DLR		 188 while (dev->master)
189 dev = dev->master;
1765a575 190 }
4d22de3e
DLR		 191 return dev;
192 }
193 }
194 return NULL;
195}
196
197static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
198 void *data)
199{
a109a5b9 200 int i;
4d22de3e 201 int ret = 0;
a109a5b9 202 unsigned int val = 0;
4d22de3e
DLR		 203 struct ulp_iscsi_info *uiip = data;
204
205 switch (req) {
206 case ULP_ISCSI_GET_PARAMS:
207 uiip->pdev = adapter->pdev;
208 uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
209 uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
210 uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
a109a5b9
KX		 211
212 val = t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ);
213 for (i = 0; i < 4; i++, val >>= 8)
214 uiip->pgsz_factor[i] = val & 0xFF;
215
216 val = t3_read_reg(adapter, A_TP_PARA_REG7);
217 uiip->max_txsz =
218 uiip->max_rxsz = min((val >> S_PMMAXXFERLEN0)&M_PMMAXXFERLEN0,
219 (val >> S_PMMAXXFERLEN1)&M_PMMAXXFERLEN1);
4d22de3e
DLR		 220 /*
221 * On tx, the iscsi pdu has to be <= tx page size and has to
222 * fit into the Tx PM FIFO.
223 */
a109a5b9
KX		 224 val = min(adapter->params.tp.tx_pg_size,
225 t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
226 uiip->max_txsz = min(val, uiip->max_txsz);
227
228 /* set MaxRxData to 16224 */
229 val = t3_read_reg(adapter, A_TP_PARA_REG2);
230 if ((val >> S_MAXRXDATA) != 0x3f60) {
231 val &= (M_RXCOALESCESIZE << S_RXCOALESCESIZE);
232 val |= V_MAXRXDATA(0x3f60);
233 printk(KERN_INFO
234 "%s, iscsi set MaxRxData to 16224 (0x%x).\n",
235 adapter->name, val);
236 t3_write_reg(adapter, A_TP_PARA_REG2, val);
237 }
238
239 /*
240 * on rx, the iscsi pdu has to be < rx page size and the
241 * the max rx data length programmed in TP
242 */
243 val = min(adapter->params.tp.rx_pg_size,
244 ((t3_read_reg(adapter, A_TP_PARA_REG2)) >>
245 S_MAXRXDATA) & M_MAXRXDATA);
246 uiip->max_rxsz = min(val, uiip->max_rxsz);
4d22de3e
DLR		 247 break;
248 case ULP_ISCSI_SET_PARAMS:
249 t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
9439f749 250 /* program the ddp page sizes */
a109a5b9
KX		 251 for (i = 0; i < 4; i++)
252 val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
253 if (val && (val != t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ))) {
254 printk(KERN_INFO
255 "%s, setting iscsi pgsz 0x%x, %u,%u,%u,%u.\n",
256 adapter->name, val, uiip->pgsz_factor[0],
257 uiip->pgsz_factor[1], uiip->pgsz_factor[2],
258 uiip->pgsz_factor[3]);
259 t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
9439f749 260 }
4d22de3e
DLR		 261 break;
262 default:
263 ret = -EOPNOTSUPP;
264 }
265 return ret;
266}
267
268/* Response queue used for RDMA events. */
269#define ASYNC_NOTIF_RSPQ 0
270
271static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
272{
273 int ret = 0;
274
275 switch (req) {
9265fabf
SH		 276 case RDMA_GET_PARAMS: {
277 struct rdma_info *rdma = data;
4d22de3e
DLR		 278 struct pci_dev *pdev = adapter->pdev;
279
9265fabf
SH		 280 rdma->udbell_physbase = pci_resource_start(pdev, 2);
281 rdma->udbell_len = pci_resource_len(pdev, 2);
282 rdma->tpt_base =
4d22de3e 283 t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
9265fabf
SH		 284 rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
285 rdma->pbl_base =
4d22de3e 286 t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
9265fabf
SH		 287 rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
288 rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
289 rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
290 rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
291 rdma->pdev = pdev;
4d22de3e
DLR		 292 break;
293 }
294 case RDMA_CQ_OP:{
295 unsigned long flags;
9265fabf 296 struct rdma_cq_op *rdma = data;
4d22de3e
DLR		 297
298 /* may be called in any context */
299 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
9265fabf
SH		 300 ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
301 rdma->credits);
4d22de3e
DLR		 302 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
303 break;
304 }
305 case RDMA_GET_MEM:{
306 struct ch_mem_range *t = data;
307 struct mc7 *mem;
308
309 if ((t->addr & 7) || (t->len & 7))
310 return -EINVAL;
311 if (t->mem_id == MEM_CM)
312 mem = &adapter->cm;
313 else if (t->mem_id == MEM_PMRX)
314 mem = &adapter->pmrx;
315 else if (t->mem_id == MEM_PMTX)
316 mem = &adapter->pmtx;
317 else
318 return -EINVAL;
319
320 ret =
321 t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
322 (u64 *) t->buf);
323 if (ret)
324 return ret;
325 break;
326 }
327 case RDMA_CQ_SETUP:{
9265fabf 328 struct rdma_cq_setup *rdma = data;
4d22de3e
DLR		 329
330 spin_lock_irq(&adapter->sge.reg_lock);
331 ret =
9265fabf
SH		 332 t3_sge_init_cqcntxt(adapter, rdma->id,
333 rdma->base_addr, rdma->size,
4d22de3e 334 ASYNC_NOTIF_RSPQ,
9265fabf
SH		 335 rdma->ovfl_mode, rdma->credits,
336 rdma->credit_thres);
4d22de3e
DLR		 337 spin_unlock_irq(&adapter->sge.reg_lock);
338 break;
339 }
340 case RDMA_CQ_DISABLE:
341 spin_lock_irq(&adapter->sge.reg_lock);
342 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
343 spin_unlock_irq(&adapter->sge.reg_lock);
344 break;
345 case RDMA_CTRL_QP_SETUP:{
9265fabf 346 struct rdma_ctrlqp_setup *rdma = data;
4d22de3e
DLR		 347
348 spin_lock_irq(&adapter->sge.reg_lock);
349 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
350 SGE_CNTXT_RDMA,
351 ASYNC_NOTIF_RSPQ,
9265fabf 352 rdma->base_addr, rdma->size,
4d22de3e
DLR		 353 FW_RI_TID_START, 1, 0);
354 spin_unlock_irq(&adapter->sge.reg_lock);
355 break;
356 }
14cc180f
SW		 357 case RDMA_GET_MIB: {
358 spin_lock(&adapter->stats_lock);
359 t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
360 spin_unlock(&adapter->stats_lock);
361 break;
362 }
4d22de3e
DLR		 363 default:
364 ret = -EOPNOTSUPP;
365 }
366 return ret;
367}
368
369static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
370{
371 struct adapter *adapter = tdev2adap(tdev);
372 struct tid_range *tid;
373 struct mtutab *mtup;
374 struct iff_mac *iffmacp;
375 struct ddp_params *ddpp;
376 struct adap_ports *ports;
e22bb45d
DLR		 377 struct ofld_page_info *rx_page_info;
378 struct tp_params *tp = &adapter->params.tp;
4d22de3e
DLR		 379 int i;
380
381 switch (req) {
382 case GET_MAX_OUTSTANDING_WR:
383 *(unsigned int *)data = FW_WR_NUM;
384 break;
385 case GET_WR_LEN:
386 *(unsigned int *)data = WR_FLITS;
387 break;
388 case GET_TX_MAX_CHUNK:
389 *(unsigned int *)data = 1 << 20; /* 1MB */
390 break;
391 case GET_TID_RANGE:
392 tid = data;
393 tid->num = t3_mc5_size(&adapter->mc5) -
394 adapter->params.mc5.nroutes -
395 adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
396 tid->base = 0;
397 break;
398 case GET_STID_RANGE:
399 tid = data;
400 tid->num = adapter->params.mc5.nservers;
401 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
402 adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
403 break;
404 case GET_L2T_CAPACITY:
405 *(unsigned int *)data = 2048;
406 break;
407 case GET_MTUS:
408 mtup = data;
409 mtup->size = NMTUS;
410 mtup->mtus = adapter->params.mtus;
411 break;
412 case GET_IFF_FROM_MAC:
413 iffmacp = data;
414 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
415 iffmacp->vlan_tag &
416 VLAN_VID_MASK);
417 break;
418 case GET_DDP_PARAMS:
419 ddpp = data;
420 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
421 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
422 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
423 break;
424 case GET_PORTS:
425 ports = data;
426 ports->nports = adapter->params.nports;
427 for_each_port(adapter, i)
428 ports->lldevs[i] = adapter->port[i];
429 break;
430 case ULP_ISCSI_GET_PARAMS:
431 case ULP_ISCSI_SET_PARAMS:
432 if (!offload_running(adapter))
433 return -EAGAIN;
434 return cxgb_ulp_iscsi_ctl(adapter, req, data);
435 case RDMA_GET_PARAMS:
436 case RDMA_CQ_OP:
437 case RDMA_CQ_SETUP:
438 case RDMA_CQ_DISABLE:
439 case RDMA_CTRL_QP_SETUP:
440 case RDMA_GET_MEM:
14cc180f 441 case RDMA_GET_MIB:
4d22de3e
DLR		 442 if (!offload_running(adapter))
443 return -EAGAIN;
444 return cxgb_rdma_ctl(adapter, req, data);
e22bb45d
DLR		 445 case GET_RX_PAGE_INFO:
446 rx_page_info = data;
447 rx_page_info->page_size = tp->rx_pg_size;
448 rx_page_info->num = tp->rx_num_pgs;
449 break;
a109a5b9
KX		 450 case GET_ISCSI_IPV4ADDR: {
451 struct iscsi_ipv4addr *p = data;
452 struct port_info *pi = netdev_priv(p->dev);
453 p->ipv4addr = pi->iscsi_ipv4addr;
454 break;
455 }
4d8cd002
DLR		 456 case GET_EMBEDDED_INFO: {
457 struct ch_embedded_info *e = data;
458
459 spin_lock(&adapter->stats_lock);
460 t3_get_fw_version(adapter, &e->fw_vers);
461 t3_get_tp_version(adapter, &e->tp_vers);
462 spin_unlock(&adapter->stats_lock);
463 break;
464 }
4d22de3e
DLR		 465 default:
466 return -EOPNOTSUPP;
467 }
468 return 0;
469}
470
471/*
472 * Dummy handler for Rx offload packets in case we get an offload packet before
473 * proper processing is setup. This complains and drops the packet as it isn't
474 * normal to get offload packets at this stage.
475 */
476static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
477 int n)
478{
4d22de3e
DLR		 479 while (n--)
480 dev_kfree_skb_any(skbs[n]);
481 return 0;
482}
483
484static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
485{
486}
487
488void cxgb3_set_dummy_ops(struct t3cdev *dev)
489{
490 dev->recv = rx_offload_blackhole;
491 dev->neigh_update = dummy_neigh_update;
492}
493
494/*
495 * Free an active-open TID.
496 */
497void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
498{
499 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
500 union active_open_entry *p = atid2entry(t, atid);
501 void *ctx = p->t3c_tid.ctx;
502
503 spin_lock_bh(&t->atid_lock);
504 p->next = t->afree;
505 t->afree = p;
506 t->atids_in_use--;
507 spin_unlock_bh(&t->atid_lock);
508
509 return ctx;
510}
511
512EXPORT_SYMBOL(cxgb3_free_atid);
513
514/*
515 * Free a server TID and return it to the free pool.
516 */
517void cxgb3_free_stid(struct t3cdev *tdev, int stid)
518{
519 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
520 union listen_entry *p = stid2entry(t, stid);
521
522 spin_lock_bh(&t->stid_lock);
523 p->next = t->sfree;
524 t->sfree = p;
525 t->stids_in_use--;
526 spin_unlock_bh(&t->stid_lock);
527}
528
529EXPORT_SYMBOL(cxgb3_free_stid);
530
531void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
532 void *ctx, unsigned int tid)
533{
534 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
535
536 t->tid_tab[tid].client = client;
537 t->tid_tab[tid].ctx = ctx;
538 atomic_inc(&t->tids_in_use);
539}
540
541EXPORT_SYMBOL(cxgb3_insert_tid);
542
543/*
544 * Populate a TID_RELEASE WR. The skb must be already propely sized.
545 */
546static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
547{
548 struct cpl_tid_release *req;
549
550 skb->priority = CPL_PRIORITY_SETUP;
551 req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
552 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
553 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
554}
555
556static void t3_process_tid_release_list(struct work_struct *work)
557{
558 struct t3c_data *td = container_of(work, struct t3c_data,
559 tid_release_task);
560 struct sk_buff *skb;
561 struct t3cdev *tdev = td->dev;
2eab17ab 562
4d22de3e
DLR		 563
564 spin_lock_bh(&td->tid_release_lock);
565 while (td->tid_release_list) {
566 struct t3c_tid_entry *p = td->tid_release_list;
567
43d620c8 568 td->tid_release_list = p->ctx;
4d22de3e
DLR		 569 spin_unlock_bh(&td->tid_release_lock);
570
571 skb = alloc_skb(sizeof(struct cpl_tid_release),
74b793e1
DLR		 572 GFP_KERNEL);
573 if (!skb)
574 skb = td->nofail_skb;
575 if (!skb) {
576 spin_lock_bh(&td->tid_release_lock);
577 p->ctx = (void *)td->tid_release_list;
64699336 578 td->tid_release_list = p;
74b793e1
DLR		 579 break;
580 }
4d22de3e
DLR		 581 mk_tid_release(skb, p - td->tid_maps.tid_tab);
582 cxgb3_ofld_send(tdev, skb);
583 p->ctx = NULL;
74b793e1
DLR		 584 if (skb == td->nofail_skb)
585 td->nofail_skb =
586 alloc_skb(sizeof(struct cpl_tid_release),
587 GFP_KERNEL);
4d22de3e
DLR		 588 spin_lock_bh(&td->tid_release_lock);
589 }
74b793e1 590 td->release_list_incomplete = (td->tid_release_list == NULL) ? 0 : 1;
4d22de3e 591 spin_unlock_bh(&td->tid_release_lock);
74b793e1
DLR		 592
593 if (!td->nofail_skb)
594 td->nofail_skb =
595 alloc_skb(sizeof(struct cpl_tid_release),
596 GFP_KERNEL);
4d22de3e
DLR		 597}
598
599/* use ctx as a next pointer in the tid release list */
600void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
601{
602 struct t3c_data *td = T3C_DATA(tdev);
603 struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
604
605 spin_lock_bh(&td->tid_release_lock);
606 p->ctx = (void *)td->tid_release_list;
606fcd0b 607 p->client = NULL;
4d22de3e 608 td->tid_release_list = p;
74b793e1 609 if (!p->ctx || td->release_list_incomplete)
4d22de3e
DLR		 610 schedule_work(&td->tid_release_task);
611 spin_unlock_bh(&td->tid_release_lock);
612}
613
614EXPORT_SYMBOL(cxgb3_queue_tid_release);
615
616/*
617 * Remove a tid from the TID table. A client may defer processing its last
618 * CPL message if it is locked at the time it arrives, and while the message
619 * sits in the client's backlog the TID may be reused for another connection.
620 * To handle this we atomically switch the TID association if it still points
621 * to the original client context.
622 */
623void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
624{
625 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
626
627 BUG_ON(tid >= t->ntids);
628 if (tdev->type == T3A)
629 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
630 else {
631 struct sk_buff *skb;
632
633 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
634 if (likely(skb)) {
635 mk_tid_release(skb, tid);
636 cxgb3_ofld_send(tdev, skb);
637 t->tid_tab[tid].ctx = NULL;
638 } else
639 cxgb3_queue_tid_release(tdev, tid);
640 }
641 atomic_dec(&t->tids_in_use);
642}
643
644EXPORT_SYMBOL(cxgb3_remove_tid);
645
646int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
647 void *ctx)
648{
649 int atid = -1;
650 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
651
652 spin_lock_bh(&t->atid_lock);
9f238486
DLR		 653 if (t->afree &&
654 t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
655 t->ntids) {
4d22de3e
DLR		 656 union active_open_entry *p = t->afree;
657
658 atid = (p - t->atid_tab) + t->atid_base;
659 t->afree = p->next;
660 p->t3c_tid.ctx = ctx;
661 p->t3c_tid.client = client;
662 t->atids_in_use++;
663 }
664 spin_unlock_bh(&t->atid_lock);
665 return atid;
666}
667
668EXPORT_SYMBOL(cxgb3_alloc_atid);
669
670int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
671 void *ctx)
672{
673 int stid = -1;
674 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
675
676 spin_lock_bh(&t->stid_lock);
677 if (t->sfree) {
678 union listen_entry *p = t->sfree;
679
680 stid = (p - t->stid_tab) + t->stid_base;
681 t->sfree = p->next;
682 p->t3c_tid.ctx = ctx;
683 p->t3c_tid.client = client;
684 t->stids_in_use++;
685 }
686 spin_unlock_bh(&t->stid_lock);
687 return stid;
688}
689
690EXPORT_SYMBOL(cxgb3_alloc_stid);
691
5fbf816f
DLR		 692/* Get the t3cdev associated with a net_device */
693struct t3cdev *dev2t3cdev(struct net_device *dev)
694{
695 const struct port_info *pi = netdev_priv(dev);
696
697 return (struct t3cdev *)pi->adapter;
698}
699
700EXPORT_SYMBOL(dev2t3cdev);
701
4d22de3e
DLR		 702static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
703{
704 struct cpl_smt_write_rpl *rpl = cplhdr(skb);
705
706 if (rpl->status != CPL_ERR_NONE)
707 printk(KERN_ERR
708 "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
709 rpl->status, GET_TID(rpl));
710
711 return CPL_RET_BUF_DONE;
712}
713
714static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
715{
716 struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
717
718 if (rpl->status != CPL_ERR_NONE)
719 printk(KERN_ERR
720 "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
721 rpl->status, GET_TID(rpl));
722
723 return CPL_RET_BUF_DONE;
724}
725
b881955b
DLR		 726static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
727{
728 struct cpl_rte_write_rpl *rpl = cplhdr(skb);
729
730 if (rpl->status != CPL_ERR_NONE)
731 printk(KERN_ERR
732 "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
733 rpl->status, GET_TID(rpl));
734
735 return CPL_RET_BUF_DONE;
736}
737
4d22de3e
DLR		 738static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
739{
740 struct cpl_act_open_rpl *rpl = cplhdr(skb);
741 unsigned int atid = G_TID(ntohl(rpl->atid));
742 struct t3c_tid_entry *t3c_tid;
743
744 t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
606fcd0b
DLR		 745 if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
746 t3c_tid->client->handlers &&
4d22de3e
DLR		 747 t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
748 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
749 t3c_tid->
750 ctx);
751 } else {
752 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
753 dev->name, CPL_ACT_OPEN_RPL);
754 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
755 }
756}
757
758static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
759{
760 union opcode_tid *p = cplhdr(skb);
761 unsigned int stid = G_TID(ntohl(p->opcode_tid));
762 struct t3c_tid_entry *t3c_tid;
763
764 t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
606fcd0b 765 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
4d22de3e
DLR		 766 t3c_tid->client->handlers[p->opcode]) {
767 return t3c_tid->client->handlers[p->opcode] (dev, skb,
768 t3c_tid->ctx);
769 } else {
770 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
771 dev->name, p->opcode);
772 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
773 }
774}
775
776static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
777{
778 union opcode_tid *p = cplhdr(skb);
779 unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
780 struct t3c_tid_entry *t3c_tid;
781
782 t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
606fcd0b 783 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
4d22de3e
DLR		 784 t3c_tid->client->handlers[p->opcode]) {
785 return t3c_tid->client->handlers[p->opcode]
786 (dev, skb, t3c_tid->ctx);
787 } else {
788 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
789 dev->name, p->opcode);
790 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
791 }
792}
793
794static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
795{
796 struct cpl_pass_accept_req *req = cplhdr(skb);
797 unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
c9a6ce50 798 struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
4d22de3e 799 struct t3c_tid_entry *t3c_tid;
c9a6ce50 800 unsigned int tid = GET_TID(req);
4d22de3e 801
c9a6ce50
DLR		 802 if (unlikely(tid >= t->ntids)) {
803 printk("%s: passive open TID %u too large\n",
804 dev->name, tid);
805 t3_fatal_err(tdev2adap(dev));
806 return CPL_RET_BUF_DONE;
807 }
808
809 t3c_tid = lookup_stid(t, stid);
810 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
4d22de3e
DLR		 811 t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
812 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
813 (dev, skb, t3c_tid->ctx);
814 } else {
815 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
816 dev->name, CPL_PASS_ACCEPT_REQ);
817 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
818 }
819}
820
606fcd0b
DLR		 821/*
822 * Returns an sk_buff for a reply CPL message of size len. If the input
823 * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
824 * is allocated. The input skb must be of size at least len. Note that this
825 * operation does not destroy the original skb data even if it decides to reuse
826 * the buffer.
827 */
828static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
1f41bb3a 829 gfp_t gfp)
606fcd0b
DLR		 830{
831 if (likely(!skb_cloned(skb))) {
832 BUG_ON(skb->len < len);
833 __skb_trim(skb, len);
834 skb_get(skb);
835 } else {
836 skb = alloc_skb(len, gfp);
837 if (skb)
838 __skb_put(skb, len);
839 }
840 return skb;
841}
842
4d22de3e
DLR		 843static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
844{
845 union opcode_tid *p = cplhdr(skb);
846 unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
847 struct t3c_tid_entry *t3c_tid;
848
849 t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
606fcd0b 850 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
4d22de3e
DLR		 851 t3c_tid->client->handlers[p->opcode]) {
852 return t3c_tid->client->handlers[p->opcode]
853 (dev, skb, t3c_tid->ctx);
854 } else {
855 struct cpl_abort_req_rss *req = cplhdr(skb);
856 struct cpl_abort_rpl *rpl;
606fcd0b
DLR		 857 struct sk_buff *reply_skb;
858 unsigned int tid = GET_TID(req);
859 u8 cmd = req->status;
860
861 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
862 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
863 goto out;
4d22de3e 864
606fcd0b
DLR		 865 reply_skb = cxgb3_get_cpl_reply_skb(skb,
866 sizeof(struct
867 cpl_abort_rpl),
868 GFP_ATOMIC);
869
870 if (!reply_skb) {
4d22de3e
DLR		 871 printk("do_abort_req_rss: couldn't get skb!\n");
872 goto out;
873 }
606fcd0b
DLR		 874 reply_skb->priority = CPL_PRIORITY_DATA;
875 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
876 rpl = cplhdr(reply_skb);
4d22de3e
DLR		 877 rpl->wr.wr_hi =
878 htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
606fcd0b
DLR		 879 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
880 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
881 rpl->cmd = cmd;
882 cxgb3_ofld_send(dev, reply_skb);
4d22de3e
DLR		 883out:
884 return CPL_RET_BUF_DONE;
885 }
886}
887
888static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
889{
890 struct cpl_act_establish *req = cplhdr(skb);
891 unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
c9a6ce50 892 struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
4d22de3e 893 struct t3c_tid_entry *t3c_tid;
c9a6ce50 894 unsigned int tid = GET_TID(req);
4d22de3e 895
c9a6ce50
DLR		 896 if (unlikely(tid >= t->ntids)) {
897 printk("%s: active establish TID %u too large\n",
898 dev->name, tid);
899 t3_fatal_err(tdev2adap(dev));
900 return CPL_RET_BUF_DONE;
901 }
902
903 t3c_tid = lookup_atid(t, atid);
606fcd0b 904 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
4d22de3e
DLR		 905 t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
906 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
907 (dev, skb, t3c_tid->ctx);
908 } else {
909 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
c9a6ce50 910 dev->name, CPL_ACT_ESTABLISH);
4d22de3e
DLR		 911 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
912 }
913}
914
4d22de3e
DLR		 915static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
916{
917 struct cpl_trace_pkt *p = cplhdr(skb);
918
b5344972 919 skb->protocol = htons(0xffff);
4d22de3e
DLR		 920 skb->dev = dev->lldev;
921 skb_pull(skb, sizeof(*p));
459a98ed 922 skb_reset_mac_header(skb);
4d22de3e
DLR		 923 netif_receive_skb(skb);
924 return 0;
925}
926
fa3a6cb4
AV		 927/*
928 * That skb would better have come from process_responses() where we abuse
929 * ->priority and ->csum to carry our data. NB: if we get to per-arch
930 * ->csum, the things might get really interesting here.
931 */
932
933static inline u32 get_hwtid(struct sk_buff *skb)
934{
935 return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
936}
937
938static inline u32 get_opcode(struct sk_buff *skb)
939{
940 return G_OPCODE(ntohl((__force __be32)skb->csum));
941}
942
4d22de3e
DLR		 943static int do_term(struct t3cdev *dev, struct sk_buff *skb)
944{
fa3a6cb4
AV		 945 unsigned int hwtid = get_hwtid(skb);
946 unsigned int opcode = get_opcode(skb);
4d22de3e
DLR		 947 struct t3c_tid_entry *t3c_tid;
948
949 t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
606fcd0b 950 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
4d22de3e
DLR		 951 t3c_tid->client->handlers[opcode]) {
952 return t3c_tid->client->handlers[opcode] (dev, skb,
953 t3c_tid->ctx);
954 } else {
955 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
956 dev->name, opcode);
957 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
958 }
959}
960
961static int nb_callback(struct notifier_block *self, unsigned long event,
962 void *ctx)
963{
964 switch (event) {
965 case (NETEVENT_NEIGH_UPDATE):{
966 cxgb_neigh_update((struct neighbour *)ctx);
967 break;
968 }
4d22de3e
DLR		 969 case (NETEVENT_REDIRECT):{
970 struct netevent_redirect *nr = ctx;
971 cxgb_redirect(nr->old, nr->new);
27217455 972 cxgb_neigh_update(dst_get_neighbour_noref(nr->new));
4d22de3e
DLR		 973 break;
974 }
975 default:
976 break;
977 }
978 return 0;
979}
980
981static struct notifier_block nb = {
982 .notifier_call = nb_callback
983};
984
985/*
986 * Process a received packet with an unknown/unexpected CPL opcode.
987 */
988static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
989{
990 printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
991 *skb->data);
992 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
993}
994
995/*
996 * Handlers for each CPL opcode
997 */
998static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
999
1000/*
1001 * Add a new handler to the CPL dispatch table. A NULL handler may be supplied
1002 * to unregister an existing handler.
1003 */
1004void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
1005{
1006 if (opcode < NUM_CPL_CMDS)
1007 cpl_handlers[opcode] = h ? h : do_bad_cpl;
1008 else
1009 printk(KERN_ERR "T3C: handler registration for "
1010 "opcode %x failed\n", opcode);
1011}
1012
1013EXPORT_SYMBOL(t3_register_cpl_handler);
1014
1015/*
1016 * T3CDEV's receive method.
1017 */
a5190b4e 1018static int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
4d22de3e
DLR		 1019{
1020 while (n--) {
1021 struct sk_buff *skb = *skbs++;
fa3a6cb4 1022 unsigned int opcode = get_opcode(skb);
4d22de3e
DLR		 1023 int ret = cpl_handlers[opcode] (dev, skb);
1024
1025#if VALIDATE_TID
1026 if (ret & CPL_RET_UNKNOWN_TID) {
1027 union opcode_tid *p = cplhdr(skb);
1028
1029 printk(KERN_ERR "%s: CPL message (opcode %u) had "
1030 "unknown TID %u\n", dev->name, opcode,
1031 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
a5190b4e 1073static void cxgb_neigh_update(struct neighbour *neigh)
4d22de3e 1074{
c4be62a4 1075 struct net_device *dev;
4d22de3e 1076
c4be62a4
DM		 1077 if (!neigh)
1078 return;
1079 dev = neigh->dev;
4d22de3e 1080 if (dev && (is_offloading(dev))) {
5fbf816f 1081 struct t3cdev *tdev = dev2t3cdev(dev);
4d22de3e
DLR		 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) {
b39d66a8 1095 printk(KERN_ERR "%s: cannot allocate skb!\n", __func__);
4d22de3e
DLR		 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
a5190b4e 1110static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
4d22de3e
DLR		 1111{
1112 struct net_device *olddev, *newdev;
c4be62a4 1113 struct neighbour *n;
4d22de3e
DLR		 1114 struct tid_info *ti;
1115 struct t3cdev *tdev;
1116 u32 tid;
1117 int update_tcb;
1118 struct l2t_entry *e;
1119 struct t3c_tid_entry *te;
1120
c4be62a4
DM		 1121 n = dst_get_neighbour_noref(old);
1122 if (!n)
1123 return;
1124 olddev = n->dev;
1125
1126 n = dst_get_neighbour_noref(new);
1127 if (!n)
1128 return;
1129 newdev = n->dev;
1130
4d22de3e
DLR		 1131 if (!is_offloading(olddev))
1132 return;
1133 if (!is_offloading(newdev)) {
f07b2e40 1134 printk(KERN_WARNING "%s: Redirect to non-offload "
b39d66a8 1135 "device ignored.\n", __func__);
4d22de3e
DLR		 1136 return;
1137 }
5fbf816f 1138 tdev = dev2t3cdev(olddev);
4d22de3e 1139 BUG_ON(!tdev);
5fbf816f 1140 if (tdev != dev2t3cdev(newdev)) {
4d22de3e 1141 printk(KERN_WARNING "%s: Redirect to different "
b39d66a8 1142 "offload device ignored.\n", __func__);
4d22de3e
DLR		 1143 return;
1144 }
1145
1146 /* Add new L2T entry */
a4757123 1147 e = t3_l2t_get(tdev, new, newdev);
4d22de3e
DLR		 1148 if (!e) {
1149 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
b39d66a8 1150 __func__);
4d22de3e
DLR		 1151 return;
1152 }
1153
1154 /* Walk tid table and notify clients of dst change. */
1155 ti = &(T3C_DATA(tdev))->tid_maps;
1156 for (tid = 0; tid < ti->ntids; tid++) {
1157 te = lookup_tid(ti, tid);
1158 BUG_ON(!te);
606fcd0b 1159 if (te && te->ctx && te->client && te->client->redirect) {
4d22de3e
DLR		 1160 update_tcb = te->client->redirect(te->ctx, old, new, e);
1161 if (update_tcb) {
e48f129c 1162 rcu_read_lock();
4d22de3e 1163 l2t_hold(L2DATA(tdev), e);
e48f129c 1164 rcu_read_unlock();
4d22de3e
DLR		 1165 set_l2t_ix(tdev, tid, e);
1166 }
1167 }
1168 }
e48f129c 1169 l2t_release(tdev, e);
4d22de3e
DLR		 1170}
1171
1172/*
1173 * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1174 * The allocated memory is cleared.
1175 */
1176void *cxgb_alloc_mem(unsigned long size)
1177{
89bf67f1 1178 void *p = kzalloc(size, GFP_KERNEL);
4d22de3e
DLR		 1179
1180 if (!p)
89bf67f1 1181 p = vzalloc(size);
4d22de3e
DLR		 1182 return p;
1183}
1184
1185/*
1186 * Free memory allocated through t3_alloc_mem().
1187 */
1188void cxgb_free_mem(void *addr)
1189{
9e2779fa 1190 if (is_vmalloc_addr(addr))
4d22de3e
DLR		 1191 vfree(addr);
1192 else
1193 kfree(addr);
1194}
1195
1196/*
1197 * Allocate and initialize the TID tables. Returns 0 on success.
1198 */
1199static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1200 unsigned int natids, unsigned int nstids,
1201 unsigned int atid_base, unsigned int stid_base)
1202{
1203 unsigned long size = ntids * sizeof(*t->tid_tab) +
1204 natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1205
1206 t->tid_tab = cxgb_alloc_mem(size);
1207 if (!t->tid_tab)
1208 return -ENOMEM;
1209
1210 t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1211 t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1212 t->ntids = ntids;
1213 t->nstids = nstids;
1214 t->stid_base = stid_base;
1215 t->sfree = NULL;
1216 t->natids = natids;
1217 t->atid_base = atid_base;
1218 t->afree = NULL;
1219 t->stids_in_use = t->atids_in_use = 0;
1220 atomic_set(&t->tids_in_use, 0);
1221 spin_lock_init(&t->stid_lock);
1222 spin_lock_init(&t->atid_lock);
1223
1224 /*
1225 * Setup the free lists for stid_tab and atid_tab.
1226 */
1227 if (nstids) {
1228 while (--nstids)
1229 t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1230 t->sfree = t->stid_tab;
1231 }
1232 if (natids) {
1233 while (--natids)
1234 t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1235 t->afree = t->atid_tab;
1236 }
1237 return 0;
1238}
1239
1240static void free_tid_maps(struct tid_info *t)
1241{
1242 cxgb_free_mem(t->tid_tab);
1243}
1244
1245static inline void add_adapter(struct adapter *adap)
1246{
1247 write_lock_bh(&adapter_list_lock);
1248 list_add_tail(&adap->adapter_list, &adapter_list);
1249 write_unlock_bh(&adapter_list_lock);
1250}
1251
1252static inline void remove_adapter(struct adapter *adap)
1253{
1254 write_lock_bh(&adapter_list_lock);
1255 list_del(&adap->adapter_list);
1256 write_unlock_bh(&adapter_list_lock);
1257}
1258
1259int cxgb3_offload_activate(struct adapter *adapter)
1260{
1261 struct t3cdev *dev = &adapter->tdev;
1262 int natids, err;
1263 struct t3c_data *t;
1264 struct tid_range stid_range, tid_range;
1265 struct mtutab mtutab;
1266 unsigned int l2t_capacity;
1267
75ed0a89 1268 t = kzalloc(sizeof(*t), GFP_KERNEL);
4d22de3e
DLR		 1269 if (!t)
1270 return -ENOMEM;
1271
1272 err = -EOPNOTSUPP;
1273 if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1274 dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1275 dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1276 dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1277 dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1278 dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1279 goto out_free;
1280
1281 err = -ENOMEM;
e48f129c 1282 RCU_INIT_POINTER(dev->l2opt, t3_init_l2t(l2t_capacity));
4d22de3e
DLR		 1283 if (!L2DATA(dev))
1284 goto out_free;
1285
1286 natids = min(tid_range.num / 2, MAX_ATIDS);
1287 err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1288 stid_range.num, ATID_BASE, stid_range.base);
1289 if (err)
1290 goto out_free_l2t;
1291
1292 t->mtus = mtutab.mtus;
1293 t->nmtus = mtutab.size;
1294
1295 INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1296 spin_lock_init(&t->tid_release_lock);
1297 INIT_LIST_HEAD(&t->list_node);
1298 t->dev = dev;
1299
1300 T3C_DATA(dev) = t;
1301 dev->recv = process_rx;
1302 dev->neigh_update = t3_l2t_update;
1303
1304 /* Register netevent handler once */
1305 if (list_empty(&adapter_list))
1306 register_netevent_notifier(&nb);
1307
74b793e1
DLR		 1308 t->nofail_skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_KERNEL);
1309 t->release_list_incomplete = 0;
1310
4d22de3e
DLR		 1311 add_adapter(adapter);
1312 return 0;
1313
1314out_free_l2t:
1315 t3_free_l2t(L2DATA(dev));
2cfa5a04 1316 RCU_INIT_POINTER(dev->l2opt, NULL);
4d22de3e
DLR		 1317out_free:
1318 kfree(t);
1319 return err;
1320}
1321
e48f129c
NH		 1322static void clean_l2_data(struct rcu_head *head)
1323{
1324 struct l2t_data *d = container_of(head, struct l2t_data, rcu_head);
1325 t3_free_l2t(d);
1326}
1327
1328
4d22de3e
DLR		 1329void cxgb3_offload_deactivate(struct adapter *adapter)
1330{
1331 struct t3cdev *tdev = &adapter->tdev;
1332 struct t3c_data *t = T3C_DATA(tdev);
e48f129c 1333 struct l2t_data *d;
4d22de3e
DLR		 1334
1335 remove_adapter(adapter);
1336 if (list_empty(&adapter_list))
1337 unregister_netevent_notifier(&nb);
1338
1339 free_tid_maps(&t->tid_maps);
1340 T3C_DATA(tdev) = NULL;
e48f129c
NH		 1341 rcu_read_lock();
1342 d = L2DATA(tdev);
1343 rcu_read_unlock();
2cfa5a04 1344 RCU_INIT_POINTER(tdev->l2opt, NULL);
e48f129c 1345 call_rcu(&d->rcu_head, clean_l2_data);
74b793e1
DLR		 1346 if (t->nofail_skb)
1347 kfree_skb(t->nofail_skb);
4d22de3e
DLR		 1348 kfree(t);
1349}
1350
1351static inline void register_tdev(struct t3cdev *tdev)
1352{
1353 static int unit;
1354
1355 mutex_lock(&cxgb3_db_lock);
1356 snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1357 list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1358 mutex_unlock(&cxgb3_db_lock);
1359}
1360
1361static inline void unregister_tdev(struct t3cdev *tdev)
1362{
1363 mutex_lock(&cxgb3_db_lock);
1364 list_del(&tdev->ofld_dev_list);
1365 mutex_unlock(&cxgb3_db_lock);
1366}
1367
8f85cd7f
DLR		 1368static inline int adap2type(struct adapter *adapter)
1369{
1370 int type = 0;
1371
1372 switch (adapter->params.rev) {
1373 case T3_REV_A:
1374 type = T3A;
1375 break;
1376 case T3_REV_B:
1377 case T3_REV_B2:
1378 type = T3B;
1379 break;
1380 case T3_REV_C:
1381 type = T3C;
1382 break;
1383 }
1384 return type;
1385}
1386
4d22de3e
DLR		 1387void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1388{
1389 struct t3cdev *tdev = &adapter->tdev;
1390
1391 INIT_LIST_HEAD(&tdev->ofld_dev_list);
1392
1393 cxgb3_set_dummy_ops(tdev);
1394 tdev->send = t3_offload_tx;
1395 tdev->ctl = cxgb_offload_ctl;
8f85cd7f 1396 tdev->type = adap2type(adapter);
4d22de3e
DLR		 1397
1398 register_tdev(tdev);
1399}
1400
1401void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1402{
1403 struct t3cdev *tdev = &adapter->tdev;
1404
1405 tdev->recv = NULL;
1406 tdev->neigh_update = NULL;
1407
1408 unregister_tdev(tdev);
1409}
1410
1411void __init cxgb3_offload_init(void)
1412{
1413 int i;
1414
1415 for (i = 0; i < NUM_CPL_CMDS; ++i)
1416 cpl_handlers[i] = do_bad_cpl;
1417
1418 t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1419 t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
b881955b 1420 t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
4d22de3e
DLR		 1421 t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1422 t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1423 t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1424 t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1425 t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1426 t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1427 t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1428 t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1429 t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1430 t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1431 t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1432 t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1433 t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1434 t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1435 t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
6cdbd77e
DLR		 1436 t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1437 t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
4d22de3e
DLR		 1438 t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1439 t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1440 t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1441 t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1442 t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1443 t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1444}
Linux kernel - Deliverables
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