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32#include <linux/module.h>
33#include <linux/list.h>
34#include <linux/slab.h>
35#include <linux/workqueue.h>
36#include <linux/skbuff.h>
37#include <linux/timer.h>
38#include <linux/notifier.h>
39#include <linux/inetdevice.h>
40
41#include <net/neighbour.h>
42#include <net/netevent.h>
43#include <net/route.h>
44
45#include "tcb.h"
46#include "cxgb3_offload.h"
47#include "iwch.h"
48#include "iwch_provider.h"
49#include "iwch_cm.h"
50
51static char *states[] = {
52 "idle",
53 "listen",
54 "connecting",
55 "mpa_wait_req",
56 "mpa_req_sent",
57 "mpa_req_rcvd",
58 "mpa_rep_sent",
59 "fpdu_mode",
60 "aborting",
61 "closing",
62 "moribund",
63 "dead",
64 NULL,
65};
66
67int peer2peer = 0;
68module_param(peer2peer, int, 0644);
69MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
70
71static int ep_timeout_secs = 60;
72module_param(ep_timeout_secs, int, 0644);
73MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
74 "in seconds (default=60)");
75
76static int mpa_rev = 1;
77module_param(mpa_rev, int, 0644);
78MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
79 "1 is spec compliant. (default=1)");
80
81static int markers_enabled = 0;
82module_param(markers_enabled, int, 0644);
83MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
84
85static int crc_enabled = 1;
86module_param(crc_enabled, int, 0644);
87MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
88
89static int rcv_win = 256 * 1024;
90module_param(rcv_win, int, 0644);
91MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256)");
92
93static int snd_win = 32 * 1024;
94module_param(snd_win, int, 0644);
95MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)");
96
97static unsigned int nocong = 0;
98module_param(nocong, uint, 0644);
99MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)");
100
101static unsigned int cong_flavor = 1;
102module_param(cong_flavor, uint, 0644);
103MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)");
104
105static struct workqueue_struct *workq;
106
107static struct sk_buff_head rxq;
108
109static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
110static void ep_timeout(unsigned long arg);
111static void connect_reply_upcall(struct iwch_ep *ep, int status);
112
113static void start_ep_timer(struct iwch_ep *ep)
114{
115 pr_debug("%s ep %p\n", __func__, ep);
116 if (timer_pending(&ep->timer)) {
117 pr_debug("%s stopped / restarted timer ep %p\n", __func__, ep);
118 del_timer_sync(&ep->timer);
119 } else
120 get_ep(&ep->com);
121 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
122 ep->timer.data = (unsigned long)ep;
123 ep->timer.function = ep_timeout;
124 add_timer(&ep->timer);
125}
126
127static void stop_ep_timer(struct iwch_ep *ep)
128{
129 pr_debug("%s ep %p\n", __func__, ep);
130 if (!timer_pending(&ep->timer)) {
131 WARN(1, "%s timer stopped when its not running! ep %p state %u\n",
132 __func__, ep, ep->com.state);
133 return;
134 }
135 del_timer_sync(&ep->timer);
136 put_ep(&ep->com);
137}
138
139static int iwch_l2t_send(struct t3cdev *tdev, struct sk_buff *skb, struct l2t_entry *l2e)
140{
141 int error = 0;
142 struct cxio_rdev *rdev;
143
144 rdev = (struct cxio_rdev *)tdev->ulp;
145 if (cxio_fatal_error(rdev)) {
146 kfree_skb(skb);
147 return -EIO;
148 }
149 error = l2t_send(tdev, skb, l2e);
150 if (error < 0)
151 kfree_skb(skb);
152 return error < 0 ? error : 0;
153}
154
155int iwch_cxgb3_ofld_send(struct t3cdev *tdev, struct sk_buff *skb)
156{
157 int error = 0;
158 struct cxio_rdev *rdev;
159
160 rdev = (struct cxio_rdev *)tdev->ulp;
161 if (cxio_fatal_error(rdev)) {
162 kfree_skb(skb);
163 return -EIO;
164 }
165 error = cxgb3_ofld_send(tdev, skb);
166 if (error < 0)
167 kfree_skb(skb);
168 return error < 0 ? error : 0;
169}
170
171static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb)
172{
173 struct cpl_tid_release *req;
174
175 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
176 if (!skb)
177 return;
178 req = skb_put(skb, sizeof(*req));
179 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
180 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
181 skb->priority = CPL_PRIORITY_SETUP;
182 iwch_cxgb3_ofld_send(tdev, skb);
183 return;
184}
185
186int iwch_quiesce_tid(struct iwch_ep *ep)
187{
188 struct cpl_set_tcb_field *req;
189 struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
190
191 if (!skb)
192 return -ENOMEM;
193 req = skb_put(skb, sizeof(*req));
194 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
195 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
196 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
197 req->reply = 0;
198 req->cpu_idx = 0;
199 req->word = htons(W_TCB_RX_QUIESCE);
200 req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
201 req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE);
202
203 skb->priority = CPL_PRIORITY_DATA;
204 return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
205}
206
207int iwch_resume_tid(struct iwch_ep *ep)
208{
209 struct cpl_set_tcb_field *req;
210 struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
211
212 if (!skb)
213 return -ENOMEM;
214 req = skb_put(skb, sizeof(*req));
215 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
216 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
217 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
218 req->reply = 0;
219 req->cpu_idx = 0;
220 req->word = htons(W_TCB_RX_QUIESCE);
221 req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
222 req->val = 0;
223
224 skb->priority = CPL_PRIORITY_DATA;
225 return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
226}
227
228static void set_emss(struct iwch_ep *ep, u16 opt)
229{
230 pr_debug("%s ep %p opt %u\n", __func__, ep, opt);
231 ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40;
232 if (G_TCPOPT_TSTAMP(opt))
233 ep->emss -= 12;
234 if (ep->emss < 128)
235 ep->emss = 128;
236 pr_debug("emss=%d\n", ep->emss);
237}
238
239static enum iwch_ep_state state_read(struct iwch_ep_common *epc)
240{
241 unsigned long flags;
242 enum iwch_ep_state state;
243
244 spin_lock_irqsave(&epc->lock, flags);
245 state = epc->state;
246 spin_unlock_irqrestore(&epc->lock, flags);
247 return state;
248}
249
250static void __state_set(struct iwch_ep_common *epc, enum iwch_ep_state new)
251{
252 epc->state = new;
253}
254
255static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new)
256{
257 unsigned long flags;
258
259 spin_lock_irqsave(&epc->lock, flags);
260 pr_debug("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
261 __state_set(epc, new);
262 spin_unlock_irqrestore(&epc->lock, flags);
263 return;
264}
265
266static void *alloc_ep(int size, gfp_t gfp)
267{
268 struct iwch_ep_common *epc;
269
270 epc = kzalloc(size, gfp);
271 if (epc) {
272 kref_init(&epc->kref);
273 spin_lock_init(&epc->lock);
274 init_waitqueue_head(&epc->waitq);
275 }
276 pr_debug("%s alloc ep %p\n", __func__, epc);
277 return epc;
278}
279
280void __free_ep(struct kref *kref)
281{
282 struct iwch_ep *ep;
283 ep = container_of(container_of(kref, struct iwch_ep_common, kref),
284 struct iwch_ep, com);
285 pr_debug("%s ep %p state %s\n",
286 __func__, ep, states[state_read(&ep->com)]);
287 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
288 cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid);
289 dst_release(ep->dst);
290 l2t_release(ep->com.tdev, ep->l2t);
291 }
292 kfree(ep);
293}
294
295static void release_ep_resources(struct iwch_ep *ep)
296{
297 pr_debug("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
298 set_bit(RELEASE_RESOURCES, &ep->com.flags);
299 put_ep(&ep->com);
300}
301
302static int status2errno(int status)
303{
304 switch (status) {
305 case CPL_ERR_NONE:
306 return 0;
307 case CPL_ERR_CONN_RESET:
308 return -ECONNRESET;
309 case CPL_ERR_ARP_MISS:
310 return -EHOSTUNREACH;
311 case CPL_ERR_CONN_TIMEDOUT:
312 return -ETIMEDOUT;
313 case CPL_ERR_TCAM_FULL:
314 return -ENOMEM;
315 case CPL_ERR_CONN_EXIST:
316 return -EADDRINUSE;
317 default:
318 return -EIO;
319 }
320}
321
322
323
324
325static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
326{
327 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
328 skb_trim(skb, 0);
329 skb_get(skb);
330 } else {
331 skb = alloc_skb(len, gfp);
332 }
333 return skb;
334}
335
336static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip,
337 __be32 peer_ip, __be16 local_port,
338 __be16 peer_port, u8 tos)
339{
340 struct rtable *rt;
341 struct flowi4 fl4;
342
343 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
344 peer_port, local_port, IPPROTO_TCP,
345 tos, 0);
346 if (IS_ERR(rt))
347 return NULL;
348 return rt;
349}
350
351static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu)
352{
353 int i = 0;
354
355 while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu)
356 ++i;
357 return i;
358}
359
360static void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb)
361{
362 pr_debug("%s t3cdev %p\n", __func__, dev);
363 kfree_skb(skb);
364}
365
366
367
368
369static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
370{
371 pr_err("ARP failure during connect\n");
372 kfree_skb(skb);
373}
374
375
376
377
378
379static void abort_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
380{
381 struct cpl_abort_req *req = cplhdr(skb);
382
383 pr_debug("%s t3cdev %p\n", __func__, dev);
384 req->cmd = CPL_ABORT_NO_RST;
385 iwch_cxgb3_ofld_send(dev, skb);
386}
387
388static int send_halfclose(struct iwch_ep *ep, gfp_t gfp)
389{
390 struct cpl_close_con_req *req;
391 struct sk_buff *skb;
392
393 pr_debug("%s ep %p\n", __func__, ep);
394 skb = get_skb(NULL, sizeof(*req), gfp);
395 if (!skb) {
396 pr_err("%s - failed to alloc skb\n", __func__);
397 return -ENOMEM;
398 }
399 skb->priority = CPL_PRIORITY_DATA;
400 set_arp_failure_handler(skb, arp_failure_discard);
401 req = skb_put(skb, sizeof(*req));
402 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON));
403 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
404 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid));
405 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
406}
407
408static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
409{
410 struct cpl_abort_req *req;
411
412 pr_debug("%s ep %p\n", __func__, ep);
413 skb = get_skb(skb, sizeof(*req), gfp);
414 if (!skb) {
415 pr_err("%s - failed to alloc skb\n", __func__);
416 return -ENOMEM;
417 }
418 skb->priority = CPL_PRIORITY_DATA;
419 set_arp_failure_handler(skb, abort_arp_failure);
420 req = (struct cpl_abort_req *) skb_put(skb, sizeof(*req));
421 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ));
422 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
423 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
424 req->cmd = CPL_ABORT_SEND_RST;
425 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
426}
427
428static int send_connect(struct iwch_ep *ep)
429{
430 struct cpl_act_open_req *req;
431 struct sk_buff *skb;
432 u32 opt0h, opt0l, opt2;
433 unsigned int mtu_idx;
434 int wscale;
435
436 pr_debug("%s ep %p\n", __func__, ep);
437
438 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
439 if (!skb) {
440 pr_err("%s - failed to alloc skb\n", __func__);
441 return -ENOMEM;
442 }
443 mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst));
444 wscale = compute_wscale(rcv_win);
445 opt0h = V_NAGLE(0) |
446 V_NO_CONG(nocong) |
447 V_KEEP_ALIVE(1) |
448 F_TCAM_BYPASS |
449 V_WND_SCALE(wscale) |
450 V_MSS_IDX(mtu_idx) |
451 V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx);
452 opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10);
453 opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) |
454 V_CONG_CONTROL_FLAVOR(cong_flavor);
455 skb->priority = CPL_PRIORITY_SETUP;
456 set_arp_failure_handler(skb, act_open_req_arp_failure);
457
458 req = skb_put(skb, sizeof(*req));
459 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
460 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ep->atid));
461 req->local_port = ep->com.local_addr.sin_port;
462 req->peer_port = ep->com.remote_addr.sin_port;
463 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
464 req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
465 req->opt0h = htonl(opt0h);
466 req->opt0l = htonl(opt0l);
467 req->params = 0;
468 req->opt2 = htonl(opt2);
469 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
470}
471
472static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb)
473{
474 int mpalen;
475 struct tx_data_wr *req;
476 struct mpa_message *mpa;
477 int len;
478
479 pr_debug("%s ep %p pd_len %d\n", __func__, ep, ep->plen);
480
481 BUG_ON(skb_cloned(skb));
482
483 mpalen = sizeof(*mpa) + ep->plen;
484 if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) {
485 kfree_skb(skb);
486 skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL);
487 if (!skb) {
488 connect_reply_upcall(ep, -ENOMEM);
489 return;
490 }
491 }
492 skb_trim(skb, 0);
493 skb_reserve(skb, sizeof(*req));
494 skb_put(skb, mpalen);
495 skb->priority = CPL_PRIORITY_DATA;
496 mpa = (struct mpa_message *) skb->data;
497 memset(mpa, 0, sizeof(*mpa));
498 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
499 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
500 (markers_enabled ? MPA_MARKERS : 0);
501 mpa->private_data_size = htons(ep->plen);
502 mpa->revision = mpa_rev;
503
504 if (ep->plen)
505 memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen);
506
507
508
509
510
511
512 skb_get(skb);
513 set_arp_failure_handler(skb, arp_failure_discard);
514 skb_reset_transport_header(skb);
515 len = skb->len;
516 req = skb_push(skb, sizeof(*req));
517 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
518 req->wr_lo = htonl(V_WR_TID(ep->hwtid));
519 req->len = htonl(len);
520 req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
521 V_TX_SNDBUF(snd_win>>15));
522 req->flags = htonl(F_TX_INIT);
523 req->sndseq = htonl(ep->snd_seq);
524 BUG_ON(ep->mpa_skb);
525 ep->mpa_skb = skb;
526 iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
527 start_ep_timer(ep);
528 state_set(&ep->com, MPA_REQ_SENT);
529 return;
530}
531
532static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen)
533{
534 int mpalen;
535 struct tx_data_wr *req;
536 struct mpa_message *mpa;
537 struct sk_buff *skb;
538
539 pr_debug("%s ep %p plen %d\n", __func__, ep, plen);
540
541 mpalen = sizeof(*mpa) + plen;
542
543 skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
544 if (!skb) {
545 pr_err("%s - cannot alloc skb!\n", __func__);
546 return -ENOMEM;
547 }
548 skb_reserve(skb, sizeof(*req));
549 mpa = skb_put(skb, mpalen);
550 memset(mpa, 0, sizeof(*mpa));
551 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
552 mpa->flags = MPA_REJECT;
553 mpa->revision = mpa_rev;
554 mpa->private_data_size = htons(plen);
555 if (plen)
556 memcpy(mpa->private_data, pdata, plen);
557
558
559
560
561
562
563 skb_get(skb);
564 skb->priority = CPL_PRIORITY_DATA;
565 set_arp_failure_handler(skb, arp_failure_discard);
566 skb_reset_transport_header(skb);
567 req = skb_push(skb, sizeof(*req));
568 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
569 req->wr_lo = htonl(V_WR_TID(ep->hwtid));
570 req->len = htonl(mpalen);
571 req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
572 V_TX_SNDBUF(snd_win>>15));
573 req->flags = htonl(F_TX_INIT);
574 req->sndseq = htonl(ep->snd_seq);
575 BUG_ON(ep->mpa_skb);
576 ep->mpa_skb = skb;
577 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
578}
579
580static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen)
581{
582 int mpalen;
583 struct tx_data_wr *req;
584 struct mpa_message *mpa;
585 int len;
586 struct sk_buff *skb;
587
588 pr_debug("%s ep %p plen %d\n", __func__, ep, plen);
589
590 mpalen = sizeof(*mpa) + plen;
591
592 skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
593 if (!skb) {
594 pr_err("%s - cannot alloc skb!\n", __func__);
595 return -ENOMEM;
596 }
597 skb->priority = CPL_PRIORITY_DATA;
598 skb_reserve(skb, sizeof(*req));
599 mpa = skb_put(skb, mpalen);
600 memset(mpa, 0, sizeof(*mpa));
601 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
602 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
603 (markers_enabled ? MPA_MARKERS : 0);
604 mpa->revision = mpa_rev;
605 mpa->private_data_size = htons(plen);
606 if (plen)
607 memcpy(mpa->private_data, pdata, plen);
608
609
610
611
612
613
614 skb_get(skb);
615 set_arp_failure_handler(skb, arp_failure_discard);
616 skb_reset_transport_header(skb);
617 len = skb->len;
618 req = skb_push(skb, sizeof(*req));
619 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
620 req->wr_lo = htonl(V_WR_TID(ep->hwtid));
621 req->len = htonl(len);
622 req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
623 V_TX_SNDBUF(snd_win>>15));
624 req->flags = htonl(F_TX_INIT);
625 req->sndseq = htonl(ep->snd_seq);
626 ep->mpa_skb = skb;
627 state_set(&ep->com, MPA_REP_SENT);
628 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
629}
630
631static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
632{
633 struct iwch_ep *ep = ctx;
634 struct cpl_act_establish *req = cplhdr(skb);
635 unsigned int tid = GET_TID(req);
636
637 pr_debug("%s ep %p tid %d\n", __func__, ep, tid);
638
639 dst_confirm(ep->dst);
640
641
642 ep->hwtid = tid;
643 cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid);
644
645 ep->snd_seq = ntohl(req->snd_isn);
646 ep->rcv_seq = ntohl(req->rcv_isn);
647
648 set_emss(ep, ntohs(req->tcp_opt));
649
650
651 cxgb3_free_atid(ep->com.tdev, ep->atid);
652
653
654 send_mpa_req(ep, skb);
655
656 return 0;
657}
658
659static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
660{
661 pr_debug("%s ep %p\n", __FILE__, ep);
662 state_set(&ep->com, ABORTING);
663 send_abort(ep, skb, gfp);
664}
665
666static void close_complete_upcall(struct iwch_ep *ep)
667{
668 struct iw_cm_event event;
669
670 pr_debug("%s ep %p\n", __func__, ep);
671 memset(&event, 0, sizeof(event));
672 event.event = IW_CM_EVENT_CLOSE;
673 if (ep->com.cm_id) {
674 pr_debug("close complete delivered ep %p cm_id %p tid %d\n",
675 ep, ep->com.cm_id, ep->hwtid);
676 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
677 ep->com.cm_id->rem_ref(ep->com.cm_id);
678 ep->com.cm_id = NULL;
679 ep->com.qp = NULL;
680 }
681}
682
683static void peer_close_upcall(struct iwch_ep *ep)
684{
685 struct iw_cm_event event;
686
687 pr_debug("%s ep %p\n", __func__, ep);
688 memset(&event, 0, sizeof(event));
689 event.event = IW_CM_EVENT_DISCONNECT;
690 if (ep->com.cm_id) {
691 pr_debug("peer close delivered ep %p cm_id %p tid %d\n",
692 ep, ep->com.cm_id, ep->hwtid);
693 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
694 }
695}
696
697static void peer_abort_upcall(struct iwch_ep *ep)
698{
699 struct iw_cm_event event;
700
701 pr_debug("%s ep %p\n", __func__, ep);
702 memset(&event, 0, sizeof(event));
703 event.event = IW_CM_EVENT_CLOSE;
704 event.status = -ECONNRESET;
705 if (ep->com.cm_id) {
706 pr_debug("abort delivered ep %p cm_id %p tid %d\n", ep,
707 ep->com.cm_id, ep->hwtid);
708 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
709 ep->com.cm_id->rem_ref(ep->com.cm_id);
710 ep->com.cm_id = NULL;
711 ep->com.qp = NULL;
712 }
713}
714
715static void connect_reply_upcall(struct iwch_ep *ep, int status)
716{
717 struct iw_cm_event event;
718
719 pr_debug("%s ep %p status %d\n", __func__, ep, status);
720 memset(&event, 0, sizeof(event));
721 event.event = IW_CM_EVENT_CONNECT_REPLY;
722 event.status = status;
723 memcpy(&event.local_addr, &ep->com.local_addr,
724 sizeof(ep->com.local_addr));
725 memcpy(&event.remote_addr, &ep->com.remote_addr,
726 sizeof(ep->com.remote_addr));
727
728 if ((status == 0) || (status == -ECONNREFUSED)) {
729 event.private_data_len = ep->plen;
730 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
731 }
732 if (ep->com.cm_id) {
733 pr_debug("%s ep %p tid %d status %d\n", __func__, ep,
734 ep->hwtid, status);
735 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
736 }
737 if (status < 0) {
738 ep->com.cm_id->rem_ref(ep->com.cm_id);
739 ep->com.cm_id = NULL;
740 ep->com.qp = NULL;
741 }
742}
743
744static void connect_request_upcall(struct iwch_ep *ep)
745{
746 struct iw_cm_event event;
747
748 pr_debug("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
749 memset(&event, 0, sizeof(event));
750 event.event = IW_CM_EVENT_CONNECT_REQUEST;
751 memcpy(&event.local_addr, &ep->com.local_addr,
752 sizeof(ep->com.local_addr));
753 memcpy(&event.remote_addr, &ep->com.remote_addr,
754 sizeof(ep->com.local_addr));
755 event.private_data_len = ep->plen;
756 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
757 event.provider_data = ep;
758
759
760
761
762 event.ird = event.ord = 8;
763 if (state_read(&ep->parent_ep->com) != DEAD) {
764 get_ep(&ep->com);
765 ep->parent_ep->com.cm_id->event_handler(
766 ep->parent_ep->com.cm_id,
767 &event);
768 }
769 put_ep(&ep->parent_ep->com);
770 ep->parent_ep = NULL;
771}
772
773static void established_upcall(struct iwch_ep *ep)
774{
775 struct iw_cm_event event;
776
777 pr_debug("%s ep %p\n", __func__, ep);
778 memset(&event, 0, sizeof(event));
779 event.event = IW_CM_EVENT_ESTABLISHED;
780
781
782
783
784 event.ird = event.ord = 8;
785 if (ep->com.cm_id) {
786 pr_debug("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
787 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
788 }
789}
790
791static int update_rx_credits(struct iwch_ep *ep, u32 credits)
792{
793 struct cpl_rx_data_ack *req;
794 struct sk_buff *skb;
795
796 pr_debug("%s ep %p credits %u\n", __func__, ep, credits);
797 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
798 if (!skb) {
799 pr_err("update_rx_credits - cannot alloc skb!\n");
800 return 0;
801 }
802
803 req = skb_put(skb, sizeof(*req));
804 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
805 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid));
806 req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1));
807 skb->priority = CPL_PRIORITY_ACK;
808 iwch_cxgb3_ofld_send(ep->com.tdev, skb);
809 return credits;
810}
811
812static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb)
813{
814 struct mpa_message *mpa;
815 u16 plen;
816 struct iwch_qp_attributes attrs;
817 enum iwch_qp_attr_mask mask;
818 int err;
819
820 pr_debug("%s ep %p\n", __func__, ep);
821
822
823
824
825
826
827 stop_ep_timer(ep);
828 if (state_read(&ep->com) != MPA_REQ_SENT)
829 return;
830
831
832
833
834
835 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
836 err = -EINVAL;
837 goto err;
838 }
839
840
841
842
843 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
844 skb->len);
845 ep->mpa_pkt_len += skb->len;
846
847
848
849
850 if (ep->mpa_pkt_len < sizeof(*mpa))
851 return;
852 mpa = (struct mpa_message *) ep->mpa_pkt;
853
854
855 if (mpa->revision != mpa_rev) {
856 err = -EPROTO;
857 goto err;
858 }
859 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
860 err = -EPROTO;
861 goto err;
862 }
863
864 plen = ntohs(mpa->private_data_size);
865
866
867
868
869 if (plen > MPA_MAX_PRIVATE_DATA) {
870 err = -EPROTO;
871 goto err;
872 }
873
874
875
876
877 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
878 err = -EPROTO;
879 goto err;
880 }
881
882 ep->plen = (u8) plen;
883
884
885
886
887
888 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
889 return;
890
891 if (mpa->flags & MPA_REJECT) {
892 err = -ECONNREFUSED;
893 goto err;
894 }
895
896
897
898
899
900
901 state_set(&ep->com, FPDU_MODE);
902 ep->mpa_attr.initiator = 1;
903 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
904 ep->mpa_attr.recv_marker_enabled = markers_enabled;
905 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
906 ep->mpa_attr.version = mpa_rev;
907 pr_debug("%s - crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d\n",
908 __func__,
909 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
910 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
911
912 attrs.mpa_attr = ep->mpa_attr;
913 attrs.max_ird = ep->ird;
914 attrs.max_ord = ep->ord;
915 attrs.llp_stream_handle = ep;
916 attrs.next_state = IWCH_QP_STATE_RTS;
917
918 mask = IWCH_QP_ATTR_NEXT_STATE |
919 IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR |
920 IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD;
921
922
923 err = iwch_modify_qp(ep->com.qp->rhp,
924 ep->com.qp, mask, &attrs, 1);
925 if (err)
926 goto err;
927
928 if (peer2peer && iwch_rqes_posted(ep->com.qp) == 0) {
929 iwch_post_zb_read(ep);
930 }
931
932 goto out;
933err:
934 abort_connection(ep, skb, GFP_KERNEL);
935out:
936 connect_reply_upcall(ep, err);
937 return;
938}
939
940static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb)
941{
942 struct mpa_message *mpa;
943 u16 plen;
944
945 pr_debug("%s ep %p\n", __func__, ep);
946
947
948
949
950
951
952 stop_ep_timer(ep);
953 if (state_read(&ep->com) != MPA_REQ_WAIT)
954 return;
955
956
957
958
959
960 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
961 abort_connection(ep, skb, GFP_KERNEL);
962 return;
963 }
964
965 pr_debug("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
966
967
968
969
970 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
971 skb->len);
972 ep->mpa_pkt_len += skb->len;
973
974
975
976
977
978 if (ep->mpa_pkt_len < sizeof(*mpa))
979 return;
980 pr_debug("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
981 mpa = (struct mpa_message *) ep->mpa_pkt;
982
983
984
985
986 if (mpa->revision != mpa_rev) {
987 abort_connection(ep, skb, GFP_KERNEL);
988 return;
989 }
990
991 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
992 abort_connection(ep, skb, GFP_KERNEL);
993 return;
994 }
995
996 plen = ntohs(mpa->private_data_size);
997
998
999
1000
1001 if (plen > MPA_MAX_PRIVATE_DATA) {
1002 abort_connection(ep, skb, GFP_KERNEL);
1003 return;
1004 }
1005
1006
1007
1008
1009 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1010 abort_connection(ep, skb, GFP_KERNEL);
1011 return;
1012 }
1013 ep->plen = (u8) plen;
1014
1015
1016
1017
1018 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1019 return;
1020
1021
1022
1023
1024
1025 ep->mpa_attr.initiator = 0;
1026 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1027 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1028 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1029 ep->mpa_attr.version = mpa_rev;
1030 pr_debug("%s - crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d\n",
1031 __func__,
1032 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1033 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
1034
1035 state_set(&ep->com, MPA_REQ_RCVD);
1036
1037
1038 connect_request_upcall(ep);
1039 return;
1040}
1041
1042static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1043{
1044 struct iwch_ep *ep = ctx;
1045 struct cpl_rx_data *hdr = cplhdr(skb);
1046 unsigned int dlen = ntohs(hdr->len);
1047
1048 pr_debug("%s ep %p dlen %u\n", __func__, ep, dlen);
1049
1050 skb_pull(skb, sizeof(*hdr));
1051 skb_trim(skb, dlen);
1052
1053 ep->rcv_seq += dlen;
1054 BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1055
1056 switch (state_read(&ep->com)) {
1057 case MPA_REQ_SENT:
1058 process_mpa_reply(ep, skb);
1059 break;
1060 case MPA_REQ_WAIT:
1061 process_mpa_request(ep, skb);
1062 break;
1063 case MPA_REP_SENT:
1064 break;
1065 default:
1066 pr_err("%s Unexpected streaming data. ep %p state %d tid %d\n",
1067 __func__, ep, state_read(&ep->com), ep->hwtid);
1068
1069
1070
1071
1072
1073 break;
1074 }
1075
1076
1077 update_rx_credits(ep, dlen);
1078
1079 return CPL_RET_BUF_DONE;
1080}
1081
1082
1083
1084
1085
1086
1087static int tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1088{
1089 struct iwch_ep *ep = ctx;
1090 struct cpl_wr_ack *hdr = cplhdr(skb);
1091 unsigned int credits = ntohs(hdr->credits);
1092 unsigned long flags;
1093 int post_zb = 0;
1094
1095 pr_debug("%s ep %p credits %u\n", __func__, ep, credits);
1096
1097 if (credits == 0) {
1098 pr_debug("%s 0 credit ack ep %p state %u\n",
1099 __func__, ep, state_read(&ep->com));
1100 return CPL_RET_BUF_DONE;
1101 }
1102
1103 spin_lock_irqsave(&ep->com.lock, flags);
1104 BUG_ON(credits != 1);
1105 dst_confirm(ep->dst);
1106 if (!ep->mpa_skb) {
1107 pr_debug("%s rdma_init wr_ack ep %p state %u\n",
1108 __func__, ep, ep->com.state);
1109 if (ep->mpa_attr.initiator) {
1110 pr_debug("%s initiator ep %p state %u\n",
1111 __func__, ep, ep->com.state);
1112 if (peer2peer && ep->com.state == FPDU_MODE)
1113 post_zb = 1;
1114 } else {
1115 pr_debug("%s responder ep %p state %u\n",
1116 __func__, ep, ep->com.state);
1117 if (ep->com.state == MPA_REQ_RCVD) {
1118 ep->com.rpl_done = 1;
1119 wake_up(&ep->com.waitq);
1120 }
1121 }
1122 } else {
1123 pr_debug("%s lsm ack ep %p state %u freeing skb\n",
1124 __func__, ep, ep->com.state);
1125 kfree_skb(ep->mpa_skb);
1126 ep->mpa_skb = NULL;
1127 }
1128 spin_unlock_irqrestore(&ep->com.lock, flags);
1129 if (post_zb)
1130 iwch_post_zb_read(ep);
1131 return CPL_RET_BUF_DONE;
1132}
1133
1134static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1135{
1136 struct iwch_ep *ep = ctx;
1137 unsigned long flags;
1138 int release = 0;
1139
1140 pr_debug("%s ep %p\n", __func__, ep);
1141 BUG_ON(!ep);
1142
1143
1144
1145
1146
1147 if (!test_and_set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags)) {
1148 return CPL_RET_BUF_DONE;
1149 }
1150
1151 spin_lock_irqsave(&ep->com.lock, flags);
1152 switch (ep->com.state) {
1153 case ABORTING:
1154 close_complete_upcall(ep);
1155 __state_set(&ep->com, DEAD);
1156 release = 1;
1157 break;
1158 default:
1159 pr_err("%s ep %p state %d\n", __func__, ep, ep->com.state);
1160 break;
1161 }
1162 spin_unlock_irqrestore(&ep->com.lock, flags);
1163
1164 if (release)
1165 release_ep_resources(ep);
1166 return CPL_RET_BUF_DONE;
1167}
1168
1169
1170
1171
1172static inline int act_open_has_tid(int status)
1173{
1174 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1175 status != CPL_ERR_ARP_MISS;
1176}
1177
1178static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1179{
1180 struct iwch_ep *ep = ctx;
1181 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1182
1183 pr_debug("%s ep %p status %u errno %d\n", __func__, ep, rpl->status,
1184 status2errno(rpl->status));
1185 connect_reply_upcall(ep, status2errno(rpl->status));
1186 state_set(&ep->com, DEAD);
1187 if (ep->com.tdev->type != T3A && act_open_has_tid(rpl->status))
1188 release_tid(ep->com.tdev, GET_TID(rpl), NULL);
1189 cxgb3_free_atid(ep->com.tdev, ep->atid);
1190 dst_release(ep->dst);
1191 l2t_release(ep->com.tdev, ep->l2t);
1192 put_ep(&ep->com);
1193 return CPL_RET_BUF_DONE;
1194}
1195
1196static int listen_start(struct iwch_listen_ep *ep)
1197{
1198 struct sk_buff *skb;
1199 struct cpl_pass_open_req *req;
1200
1201 pr_debug("%s ep %p\n", __func__, ep);
1202 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1203 if (!skb) {
1204 pr_err("t3c_listen_start failed to alloc skb!\n");
1205 return -ENOMEM;
1206 }
1207
1208 req = skb_put(skb, sizeof(*req));
1209 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1210 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, ep->stid));
1211 req->local_port = ep->com.local_addr.sin_port;
1212 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
1213 req->peer_port = 0;
1214 req->peer_ip = 0;
1215 req->peer_netmask = 0;
1216 req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS);
1217 req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10));
1218 req->opt1 = htonl(V_CONN_POLICY(CPL_CONN_POLICY_ASK));
1219
1220 skb->priority = 1;
1221 return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
1222}
1223
1224static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1225{
1226 struct iwch_listen_ep *ep = ctx;
1227 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1228
1229 pr_debug("%s ep %p status %d error %d\n", __func__, ep,
1230 rpl->status, status2errno(rpl->status));
1231 ep->com.rpl_err = status2errno(rpl->status);
1232 ep->com.rpl_done = 1;
1233 wake_up(&ep->com.waitq);
1234
1235 return CPL_RET_BUF_DONE;
1236}
1237
1238static int listen_stop(struct iwch_listen_ep *ep)
1239{
1240 struct sk_buff *skb;
1241 struct cpl_close_listserv_req *req;
1242
1243 pr_debug("%s ep %p\n", __func__, ep);
1244 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1245 if (!skb) {
1246 pr_err("%s - failed to alloc skb\n", __func__);
1247 return -ENOMEM;
1248 }
1249 req = skb_put(skb, sizeof(*req));
1250 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1251 req->cpu_idx = 0;
1252 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid));
1253 skb->priority = 1;
1254 return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
1255}
1256
1257static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb,
1258 void *ctx)
1259{
1260 struct iwch_listen_ep *ep = ctx;
1261 struct cpl_close_listserv_rpl *rpl = cplhdr(skb);
1262
1263 pr_debug("%s ep %p\n", __func__, ep);
1264 ep->com.rpl_err = status2errno(rpl->status);
1265 ep->com.rpl_done = 1;
1266 wake_up(&ep->com.waitq);
1267 return CPL_RET_BUF_DONE;
1268}
1269
1270static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb)
1271{
1272 struct cpl_pass_accept_rpl *rpl;
1273 unsigned int mtu_idx;
1274 u32 opt0h, opt0l, opt2;
1275 int wscale;
1276
1277 pr_debug("%s ep %p\n", __func__, ep);
1278 BUG_ON(skb_cloned(skb));
1279 skb_trim(skb, sizeof(*rpl));
1280 skb_get(skb);
1281 mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst));
1282 wscale = compute_wscale(rcv_win);
1283 opt0h = V_NAGLE(0) |
1284 V_NO_CONG(nocong) |
1285 V_KEEP_ALIVE(1) |
1286 F_TCAM_BYPASS |
1287 V_WND_SCALE(wscale) |
1288 V_MSS_IDX(mtu_idx) |
1289 V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx);
1290 opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10);
1291 opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) |
1292 V_CONG_CONTROL_FLAVOR(cong_flavor);
1293
1294 rpl = cplhdr(skb);
1295 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1296 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid));
1297 rpl->peer_ip = peer_ip;
1298 rpl->opt0h = htonl(opt0h);
1299 rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT);
1300 rpl->opt2 = htonl(opt2);
1301 rpl->rsvd = rpl->opt2;
1302 skb->priority = CPL_PRIORITY_SETUP;
1303 iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
1304
1305 return;
1306}
1307
1308static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip,
1309 struct sk_buff *skb)
1310{
1311 pr_debug("%s t3cdev %p tid %u peer_ip %x\n", __func__, tdev, hwtid,
1312 peer_ip);
1313 BUG_ON(skb_cloned(skb));
1314 skb_trim(skb, sizeof(struct cpl_tid_release));
1315 skb_get(skb);
1316
1317 if (tdev->type != T3A)
1318 release_tid(tdev, hwtid, skb);
1319 else {
1320 struct cpl_pass_accept_rpl *rpl;
1321
1322 rpl = cplhdr(skb);
1323 skb->priority = CPL_PRIORITY_SETUP;
1324 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1325 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1326 hwtid));
1327 rpl->peer_ip = peer_ip;
1328 rpl->opt0h = htonl(F_TCAM_BYPASS);
1329 rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT);
1330 rpl->opt2 = 0;
1331 rpl->rsvd = rpl->opt2;
1332 iwch_cxgb3_ofld_send(tdev, skb);
1333 }
1334}
1335
1336static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1337{
1338 struct iwch_ep *child_ep, *parent_ep = ctx;
1339 struct cpl_pass_accept_req *req = cplhdr(skb);
1340 unsigned int hwtid = GET_TID(req);
1341 struct dst_entry *dst;
1342 struct l2t_entry *l2t;
1343 struct rtable *rt;
1344 struct iff_mac tim;
1345
1346 pr_debug("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
1347
1348 if (state_read(&parent_ep->com) != LISTEN) {
1349 pr_err("%s - listening ep not in LISTEN\n", __func__);
1350 goto reject;
1351 }
1352
1353
1354
1355
1356 tim.mac_addr = req->dst_mac;
1357 tim.vlan_tag = ntohs(req->vlan_tag);
1358 if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) {
1359 pr_err("%s bad dst mac %pM\n", __func__, req->dst_mac);
1360 goto reject;
1361 }
1362
1363
1364 rt = find_route(tdev,
1365 req->local_ip,
1366 req->peer_ip,
1367 req->local_port,
1368 req->peer_port, G_PASS_OPEN_TOS(ntohl(req->tos_tid)));
1369 if (!rt) {
1370 pr_err("%s - failed to find dst entry!\n", __func__);
1371 goto reject;
1372 }
1373 dst = &rt->dst;
1374 l2t = t3_l2t_get(tdev, dst, NULL, &req->peer_ip);
1375 if (!l2t) {
1376 pr_err("%s - failed to allocate l2t entry!\n", __func__);
1377 dst_release(dst);
1378 goto reject;
1379 }
1380 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1381 if (!child_ep) {
1382 pr_err("%s - failed to allocate ep entry!\n", __func__);
1383 l2t_release(tdev, l2t);
1384 dst_release(dst);
1385 goto reject;
1386 }
1387 state_set(&child_ep->com, CONNECTING);
1388 child_ep->com.tdev = tdev;
1389 child_ep->com.cm_id = NULL;
1390 child_ep->com.local_addr.sin_family = AF_INET;
1391 child_ep->com.local_addr.sin_port = req->local_port;
1392 child_ep->com.local_addr.sin_addr.s_addr = req->local_ip;
1393 child_ep->com.remote_addr.sin_family = AF_INET;
1394 child_ep->com.remote_addr.sin_port = req->peer_port;
1395 child_ep->com.remote_addr.sin_addr.s_addr = req->peer_ip;
1396 get_ep(&parent_ep->com);
1397 child_ep->parent_ep = parent_ep;
1398 child_ep->tos = G_PASS_OPEN_TOS(ntohl(req->tos_tid));
1399 child_ep->l2t = l2t;
1400 child_ep->dst = dst;
1401 child_ep->hwtid = hwtid;
1402 init_timer(&child_ep->timer);
1403 cxgb3_insert_tid(tdev, &t3c_client, child_ep, hwtid);
1404 accept_cr(child_ep, req->peer_ip, skb);
1405 goto out;
1406reject:
1407 reject_cr(tdev, hwtid, req->peer_ip, skb);
1408out:
1409 return CPL_RET_BUF_DONE;
1410}
1411
1412static int pass_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1413{
1414 struct iwch_ep *ep = ctx;
1415 struct cpl_pass_establish *req = cplhdr(skb);
1416
1417 pr_debug("%s ep %p\n", __func__, ep);
1418 ep->snd_seq = ntohl(req->snd_isn);
1419 ep->rcv_seq = ntohl(req->rcv_isn);
1420
1421 set_emss(ep, ntohs(req->tcp_opt));
1422
1423 dst_confirm(ep->dst);
1424 state_set(&ep->com, MPA_REQ_WAIT);
1425 start_ep_timer(ep);
1426
1427 return CPL_RET_BUF_DONE;
1428}
1429
1430static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1431{
1432 struct iwch_ep *ep = ctx;
1433 struct iwch_qp_attributes attrs;
1434 unsigned long flags;
1435 int disconnect = 1;
1436 int release = 0;
1437
1438 pr_debug("%s ep %p\n", __func__, ep);
1439 dst_confirm(ep->dst);
1440
1441 spin_lock_irqsave(&ep->com.lock, flags);
1442 switch (ep->com.state) {
1443 case MPA_REQ_WAIT:
1444 __state_set(&ep->com, CLOSING);
1445 break;
1446 case MPA_REQ_SENT:
1447 __state_set(&ep->com, CLOSING);
1448 connect_reply_upcall(ep, -ECONNRESET);
1449 break;
1450 case MPA_REQ_RCVD:
1451
1452
1453
1454
1455
1456
1457
1458 __state_set(&ep->com, CLOSING);
1459 ep->com.rpl_done = 1;
1460 ep->com.rpl_err = -ECONNRESET;
1461 pr_debug("waking up ep %p\n", ep);
1462 wake_up(&ep->com.waitq);
1463 break;
1464 case MPA_REP_SENT:
1465 __state_set(&ep->com, CLOSING);
1466 ep->com.rpl_done = 1;
1467 ep->com.rpl_err = -ECONNRESET;
1468 pr_debug("waking up ep %p\n", ep);
1469 wake_up(&ep->com.waitq);
1470 break;
1471 case FPDU_MODE:
1472 start_ep_timer(ep);
1473 __state_set(&ep->com, CLOSING);
1474 attrs.next_state = IWCH_QP_STATE_CLOSING;
1475 iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
1476 IWCH_QP_ATTR_NEXT_STATE, &attrs, 1);
1477 peer_close_upcall(ep);
1478 break;
1479 case ABORTING:
1480 disconnect = 0;
1481 break;
1482 case CLOSING:
1483 __state_set(&ep->com, MORIBUND);
1484 disconnect = 0;
1485 break;
1486 case MORIBUND:
1487 stop_ep_timer(ep);
1488 if (ep->com.cm_id && ep->com.qp) {
1489 attrs.next_state = IWCH_QP_STATE_IDLE;
1490 iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
1491 IWCH_QP_ATTR_NEXT_STATE, &attrs, 1);
1492 }
1493 close_complete_upcall(ep);
1494 __state_set(&ep->com, DEAD);
1495 release = 1;
1496 disconnect = 0;
1497 break;
1498 case DEAD:
1499 disconnect = 0;
1500 break;
1501 default:
1502 BUG_ON(1);
1503 }
1504 spin_unlock_irqrestore(&ep->com.lock, flags);
1505 if (disconnect)
1506 iwch_ep_disconnect(ep, 0, GFP_KERNEL);
1507 if (release)
1508 release_ep_resources(ep);
1509 return CPL_RET_BUF_DONE;
1510}
1511
1512
1513
1514
1515static int is_neg_adv_abort(unsigned int status)
1516{
1517 return status == CPL_ERR_RTX_NEG_ADVICE ||
1518 status == CPL_ERR_PERSIST_NEG_ADVICE;
1519}
1520
1521static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1522{
1523 struct cpl_abort_req_rss *req = cplhdr(skb);
1524 struct iwch_ep *ep = ctx;
1525 struct cpl_abort_rpl *rpl;
1526 struct sk_buff *rpl_skb;
1527 struct iwch_qp_attributes attrs;
1528 int ret;
1529 int release = 0;
1530 unsigned long flags;
1531
1532 if (is_neg_adv_abort(req->status)) {
1533 pr_debug("%s neg_adv_abort ep %p tid %d\n", __func__, ep,
1534 ep->hwtid);
1535 t3_l2t_send_event(ep->com.tdev, ep->l2t);
1536 return CPL_RET_BUF_DONE;
1537 }
1538
1539
1540
1541
1542
1543 if (!test_and_set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags)) {
1544 return CPL_RET_BUF_DONE;
1545 }
1546
1547 spin_lock_irqsave(&ep->com.lock, flags);
1548 pr_debug("%s ep %p state %u\n", __func__, ep, ep->com.state);
1549 switch (ep->com.state) {
1550 case CONNECTING:
1551 break;
1552 case MPA_REQ_WAIT:
1553 stop_ep_timer(ep);
1554 break;
1555 case MPA_REQ_SENT:
1556 stop_ep_timer(ep);
1557 connect_reply_upcall(ep, -ECONNRESET);
1558 break;
1559 case MPA_REP_SENT:
1560 ep->com.rpl_done = 1;
1561 ep->com.rpl_err = -ECONNRESET;
1562 pr_debug("waking up ep %p\n", ep);
1563 wake_up(&ep->com.waitq);
1564 break;
1565 case MPA_REQ_RCVD:
1566
1567
1568
1569
1570
1571
1572
1573 ep->com.rpl_done = 1;
1574 ep->com.rpl_err = -ECONNRESET;
1575 pr_debug("waking up ep %p\n", ep);
1576 wake_up(&ep->com.waitq);
1577 break;
1578 case MORIBUND:
1579 case CLOSING:
1580 stop_ep_timer(ep);
1581
1582 case FPDU_MODE:
1583 if (ep->com.cm_id && ep->com.qp) {
1584 attrs.next_state = IWCH_QP_STATE_ERROR;
1585 ret = iwch_modify_qp(ep->com.qp->rhp,
1586 ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
1587 &attrs, 1);
1588 if (ret)
1589 pr_err("%s - qp <- error failed!\n", __func__);
1590 }
1591 peer_abort_upcall(ep);
1592 break;
1593 case ABORTING:
1594 break;
1595 case DEAD:
1596 pr_debug("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
1597 spin_unlock_irqrestore(&ep->com.lock, flags);
1598 return CPL_RET_BUF_DONE;
1599 default:
1600 BUG_ON(1);
1601 break;
1602 }
1603 dst_confirm(ep->dst);
1604 if (ep->com.state != ABORTING) {
1605 __state_set(&ep->com, DEAD);
1606 release = 1;
1607 }
1608 spin_unlock_irqrestore(&ep->com.lock, flags);
1609
1610 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
1611 if (!rpl_skb) {
1612 pr_err("%s - cannot allocate skb!\n", __func__);
1613 release = 1;
1614 goto out;
1615 }
1616 rpl_skb->priority = CPL_PRIORITY_DATA;
1617 rpl = skb_put(rpl_skb, sizeof(*rpl));
1618 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
1619 rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
1620 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
1621 rpl->cmd = CPL_ABORT_NO_RST;
1622 iwch_cxgb3_ofld_send(ep->com.tdev, rpl_skb);
1623out:
1624 if (release)
1625 release_ep_resources(ep);
1626 return CPL_RET_BUF_DONE;
1627}
1628
1629static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1630{
1631 struct iwch_ep *ep = ctx;
1632 struct iwch_qp_attributes attrs;
1633 unsigned long flags;
1634 int release = 0;
1635
1636 pr_debug("%s ep %p\n", __func__, ep);
1637 BUG_ON(!ep);
1638
1639
1640 spin_lock_irqsave(&ep->com.lock, flags);
1641 switch (ep->com.state) {
1642 case CLOSING:
1643 __state_set(&ep->com, MORIBUND);
1644 break;
1645 case MORIBUND:
1646 stop_ep_timer(ep);
1647 if ((ep->com.cm_id) && (ep->com.qp)) {
1648 attrs.next_state = IWCH_QP_STATE_IDLE;
1649 iwch_modify_qp(ep->com.qp->rhp,
1650 ep->com.qp,
1651 IWCH_QP_ATTR_NEXT_STATE,
1652 &attrs, 1);
1653 }
1654 close_complete_upcall(ep);
1655 __state_set(&ep->com, DEAD);
1656 release = 1;
1657 break;
1658 case ABORTING:
1659 case DEAD:
1660 break;
1661 default:
1662 BUG_ON(1);
1663 break;
1664 }
1665 spin_unlock_irqrestore(&ep->com.lock, flags);
1666 if (release)
1667 release_ep_resources(ep);
1668 return CPL_RET_BUF_DONE;
1669}
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1684{
1685 struct iwch_ep *ep = ctx;
1686
1687 if (state_read(&ep->com) != FPDU_MODE)
1688 return CPL_RET_BUF_DONE;
1689
1690 pr_debug("%s ep %p\n", __func__, ep);
1691 skb_pull(skb, sizeof(struct cpl_rdma_terminate));
1692 pr_debug("%s saving %d bytes of term msg\n", __func__, skb->len);
1693 skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer,
1694 skb->len);
1695 ep->com.qp->attr.terminate_msg_len = skb->len;
1696 ep->com.qp->attr.is_terminate_local = 0;
1697 return CPL_RET_BUF_DONE;
1698}
1699
1700static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1701{
1702 struct cpl_rdma_ec_status *rep = cplhdr(skb);
1703 struct iwch_ep *ep = ctx;
1704
1705 pr_debug("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid,
1706 rep->status);
1707 if (rep->status) {
1708 struct iwch_qp_attributes attrs;
1709
1710 pr_err("%s BAD CLOSE - Aborting tid %u\n",
1711 __func__, ep->hwtid);
1712 stop_ep_timer(ep);
1713 attrs.next_state = IWCH_QP_STATE_ERROR;
1714 iwch_modify_qp(ep->com.qp->rhp,
1715 ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
1716 &attrs, 1);
1717 abort_connection(ep, NULL, GFP_KERNEL);
1718 }
1719 return CPL_RET_BUF_DONE;
1720}
1721
1722static void ep_timeout(unsigned long arg)
1723{
1724 struct iwch_ep *ep = (struct iwch_ep *)arg;
1725 struct iwch_qp_attributes attrs;
1726 unsigned long flags;
1727 int abort = 1;
1728
1729 spin_lock_irqsave(&ep->com.lock, flags);
1730 pr_debug("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
1731 ep->com.state);
1732 switch (ep->com.state) {
1733 case MPA_REQ_SENT:
1734 __state_set(&ep->com, ABORTING);
1735 connect_reply_upcall(ep, -ETIMEDOUT);
1736 break;
1737 case MPA_REQ_WAIT:
1738 __state_set(&ep->com, ABORTING);
1739 break;
1740 case CLOSING:
1741 case MORIBUND:
1742 if (ep->com.cm_id && ep->com.qp) {
1743 attrs.next_state = IWCH_QP_STATE_ERROR;
1744 iwch_modify_qp(ep->com.qp->rhp,
1745 ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
1746 &attrs, 1);
1747 }
1748 __state_set(&ep->com, ABORTING);
1749 break;
1750 default:
1751 WARN(1, "%s unexpected state ep %p state %u\n",
1752 __func__, ep, ep->com.state);
1753 abort = 0;
1754 }
1755 spin_unlock_irqrestore(&ep->com.lock, flags);
1756 if (abort)
1757 abort_connection(ep, NULL, GFP_ATOMIC);
1758 put_ep(&ep->com);
1759}
1760
1761int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
1762{
1763 int err;
1764 struct iwch_ep *ep = to_ep(cm_id);
1765 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1766
1767 if (state_read(&ep->com) == DEAD) {
1768 put_ep(&ep->com);
1769 return -ECONNRESET;
1770 }
1771 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1772 if (mpa_rev == 0)
1773 abort_connection(ep, NULL, GFP_KERNEL);
1774 else {
1775 err = send_mpa_reject(ep, pdata, pdata_len);
1776 err = iwch_ep_disconnect(ep, 0, GFP_KERNEL);
1777 }
1778 put_ep(&ep->com);
1779 return 0;
1780}
1781
1782int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1783{
1784 int err;
1785 struct iwch_qp_attributes attrs;
1786 enum iwch_qp_attr_mask mask;
1787 struct iwch_ep *ep = to_ep(cm_id);
1788 struct iwch_dev *h = to_iwch_dev(cm_id->device);
1789 struct iwch_qp *qp = get_qhp(h, conn_param->qpn);
1790
1791 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1792 if (state_read(&ep->com) == DEAD) {
1793 err = -ECONNRESET;
1794 goto err;
1795 }
1796
1797 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1798 BUG_ON(!qp);
1799
1800 if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) ||
1801 (conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) {
1802 abort_connection(ep, NULL, GFP_KERNEL);
1803 err = -EINVAL;
1804 goto err;
1805 }
1806
1807 cm_id->add_ref(cm_id);
1808 ep->com.cm_id = cm_id;
1809 ep->com.qp = qp;
1810
1811 ep->ird = conn_param->ird;
1812 ep->ord = conn_param->ord;
1813
1814 if (peer2peer && ep->ird == 0)
1815 ep->ird = 1;
1816
1817 pr_debug("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
1818
1819
1820 attrs.mpa_attr = ep->mpa_attr;
1821 attrs.max_ird = ep->ird;
1822 attrs.max_ord = ep->ord;
1823 attrs.llp_stream_handle = ep;
1824 attrs.next_state = IWCH_QP_STATE_RTS;
1825
1826
1827 mask = IWCH_QP_ATTR_NEXT_STATE |
1828 IWCH_QP_ATTR_LLP_STREAM_HANDLE |
1829 IWCH_QP_ATTR_MPA_ATTR |
1830 IWCH_QP_ATTR_MAX_IRD |
1831 IWCH_QP_ATTR_MAX_ORD;
1832
1833 err = iwch_modify_qp(ep->com.qp->rhp,
1834 ep->com.qp, mask, &attrs, 1);
1835 if (err)
1836 goto err1;
1837
1838
1839 if (iwch_rqes_posted(qp)) {
1840 wait_event(ep->com.waitq, ep->com.rpl_done);
1841 err = ep->com.rpl_err;
1842 if (err)
1843 goto err1;
1844 }
1845
1846 err = send_mpa_reply(ep, conn_param->private_data,
1847 conn_param->private_data_len);
1848 if (err)
1849 goto err1;
1850
1851
1852 state_set(&ep->com, FPDU_MODE);
1853 established_upcall(ep);
1854 put_ep(&ep->com);
1855 return 0;
1856err1:
1857 ep->com.cm_id = NULL;
1858 ep->com.qp = NULL;
1859 cm_id->rem_ref(cm_id);
1860err:
1861 put_ep(&ep->com);
1862 return err;
1863}
1864
1865static int is_loopback_dst(struct iw_cm_id *cm_id)
1866{
1867 struct net_device *dev;
1868 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
1869
1870 dev = ip_dev_find(&init_net, raddr->sin_addr.s_addr);
1871 if (!dev)
1872 return 0;
1873 dev_put(dev);
1874 return 1;
1875}
1876
1877int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1878{
1879 struct iwch_dev *h = to_iwch_dev(cm_id->device);
1880 struct iwch_ep *ep;
1881 struct rtable *rt;
1882 int err = 0;
1883 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
1884 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
1885
1886 if (cm_id->m_remote_addr.ss_family != PF_INET) {
1887 err = -ENOSYS;
1888 goto out;
1889 }
1890
1891 if (is_loopback_dst(cm_id)) {
1892 err = -ENOSYS;
1893 goto out;
1894 }
1895
1896 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1897 if (!ep) {
1898 pr_err("%s - cannot alloc ep\n", __func__);
1899 err = -ENOMEM;
1900 goto out;
1901 }
1902 init_timer(&ep->timer);
1903 ep->plen = conn_param->private_data_len;
1904 if (ep->plen)
1905 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
1906 conn_param->private_data, ep->plen);
1907 ep->ird = conn_param->ird;
1908 ep->ord = conn_param->ord;
1909
1910 if (peer2peer && ep->ord == 0)
1911 ep->ord = 1;
1912
1913 ep->com.tdev = h->rdev.t3cdev_p;
1914
1915 cm_id->add_ref(cm_id);
1916 ep->com.cm_id = cm_id;
1917 ep->com.qp = get_qhp(h, conn_param->qpn);
1918 BUG_ON(!ep->com.qp);
1919 pr_debug("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
1920 ep->com.qp, cm_id);
1921
1922
1923
1924
1925 ep->atid = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep);
1926 if (ep->atid == -1) {
1927 pr_err("%s - cannot alloc atid\n", __func__);
1928 err = -ENOMEM;
1929 goto fail2;
1930 }
1931
1932
1933 rt = find_route(h->rdev.t3cdev_p, laddr->sin_addr.s_addr,
1934 raddr->sin_addr.s_addr, laddr->sin_port,
1935 raddr->sin_port, IPTOS_LOWDELAY);
1936 if (!rt) {
1937 pr_err("%s - cannot find route\n", __func__);
1938 err = -EHOSTUNREACH;
1939 goto fail3;
1940 }
1941 ep->dst = &rt->dst;
1942 ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst, NULL,
1943 &raddr->sin_addr.s_addr);
1944 if (!ep->l2t) {
1945 pr_err("%s - cannot alloc l2e\n", __func__);
1946 err = -ENOMEM;
1947 goto fail4;
1948 }
1949
1950 state_set(&ep->com, CONNECTING);
1951 ep->tos = IPTOS_LOWDELAY;
1952 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
1953 sizeof(ep->com.local_addr));
1954 memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
1955 sizeof(ep->com.remote_addr));
1956
1957
1958 err = send_connect(ep);
1959 if (!err)
1960 goto out;
1961
1962 l2t_release(h->rdev.t3cdev_p, ep->l2t);
1963fail4:
1964 dst_release(ep->dst);
1965fail3:
1966 cxgb3_free_atid(ep->com.tdev, ep->atid);
1967fail2:
1968 cm_id->rem_ref(cm_id);
1969 put_ep(&ep->com);
1970out:
1971 return err;
1972}
1973
1974int iwch_create_listen(struct iw_cm_id *cm_id, int backlog)
1975{
1976 int err = 0;
1977 struct iwch_dev *h = to_iwch_dev(cm_id->device);
1978 struct iwch_listen_ep *ep;
1979
1980
1981 might_sleep();
1982
1983 if (cm_id->m_local_addr.ss_family != PF_INET) {
1984 err = -ENOSYS;
1985 goto fail1;
1986 }
1987
1988 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1989 if (!ep) {
1990 pr_err("%s - cannot alloc ep\n", __func__);
1991 err = -ENOMEM;
1992 goto fail1;
1993 }
1994 pr_debug("%s ep %p\n", __func__, ep);
1995 ep->com.tdev = h->rdev.t3cdev_p;
1996 cm_id->add_ref(cm_id);
1997 ep->com.cm_id = cm_id;
1998 ep->backlog = backlog;
1999 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
2000 sizeof(ep->com.local_addr));
2001
2002
2003
2004
2005 ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep);
2006 if (ep->stid == -1) {
2007 pr_err("%s - cannot alloc atid\n", __func__);
2008 err = -ENOMEM;
2009 goto fail2;
2010 }
2011
2012 state_set(&ep->com, LISTEN);
2013 err = listen_start(ep);
2014 if (err)
2015 goto fail3;
2016
2017
2018 wait_event(ep->com.waitq, ep->com.rpl_done);
2019 err = ep->com.rpl_err;
2020 if (!err) {
2021 cm_id->provider_data = ep;
2022 goto out;
2023 }
2024fail3:
2025 cxgb3_free_stid(ep->com.tdev, ep->stid);
2026fail2:
2027 cm_id->rem_ref(cm_id);
2028 put_ep(&ep->com);
2029fail1:
2030out:
2031 return err;
2032}
2033
2034int iwch_destroy_listen(struct iw_cm_id *cm_id)
2035{
2036 int err;
2037 struct iwch_listen_ep *ep = to_listen_ep(cm_id);
2038
2039 pr_debug("%s ep %p\n", __func__, ep);
2040
2041 might_sleep();
2042 state_set(&ep->com, DEAD);
2043 ep->com.rpl_done = 0;
2044 ep->com.rpl_err = 0;
2045 err = listen_stop(ep);
2046 if (err)
2047 goto done;
2048 wait_event(ep->com.waitq, ep->com.rpl_done);
2049 cxgb3_free_stid(ep->com.tdev, ep->stid);
2050done:
2051 err = ep->com.rpl_err;
2052 cm_id->rem_ref(cm_id);
2053 put_ep(&ep->com);
2054 return err;
2055}
2056
2057int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp)
2058{
2059 int ret=0;
2060 unsigned long flags;
2061 int close = 0;
2062 int fatal = 0;
2063 struct t3cdev *tdev;
2064 struct cxio_rdev *rdev;
2065
2066 spin_lock_irqsave(&ep->com.lock, flags);
2067
2068 pr_debug("%s ep %p state %s, abrupt %d\n", __func__, ep,
2069 states[ep->com.state], abrupt);
2070
2071 tdev = (struct t3cdev *)ep->com.tdev;
2072 rdev = (struct cxio_rdev *)tdev->ulp;
2073 if (cxio_fatal_error(rdev)) {
2074 fatal = 1;
2075 close_complete_upcall(ep);
2076 ep->com.state = DEAD;
2077 }
2078 switch (ep->com.state) {
2079 case MPA_REQ_WAIT:
2080 case MPA_REQ_SENT:
2081 case MPA_REQ_RCVD:
2082 case MPA_REP_SENT:
2083 case FPDU_MODE:
2084 close = 1;
2085 if (abrupt)
2086 ep->com.state = ABORTING;
2087 else {
2088 ep->com.state = CLOSING;
2089 start_ep_timer(ep);
2090 }
2091 set_bit(CLOSE_SENT, &ep->com.flags);
2092 break;
2093 case CLOSING:
2094 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2095 close = 1;
2096 if (abrupt) {
2097 stop_ep_timer(ep);
2098 ep->com.state = ABORTING;
2099 } else
2100 ep->com.state = MORIBUND;
2101 }
2102 break;
2103 case MORIBUND:
2104 case ABORTING:
2105 case DEAD:
2106 pr_debug("%s ignoring disconnect ep %p state %u\n",
2107 __func__, ep, ep->com.state);
2108 break;
2109 default:
2110 BUG();
2111 break;
2112 }
2113
2114 spin_unlock_irqrestore(&ep->com.lock, flags);
2115 if (close) {
2116 if (abrupt)
2117 ret = send_abort(ep, NULL, gfp);
2118 else
2119 ret = send_halfclose(ep, gfp);
2120 if (ret)
2121 fatal = 1;
2122 }
2123 if (fatal)
2124 release_ep_resources(ep);
2125 return ret;
2126}
2127
2128int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
2129 struct l2t_entry *l2t)
2130{
2131 struct iwch_ep *ep = ctx;
2132
2133 if (ep->dst != old)
2134 return 0;
2135
2136 pr_debug("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new,
2137 l2t);
2138 dst_hold(new);
2139 l2t_release(ep->com.tdev, ep->l2t);
2140 ep->l2t = l2t;
2141 dst_release(old);
2142 ep->dst = new;
2143 return 1;
2144}
2145
2146
2147
2148
2149
2150static const cxgb3_cpl_handler_func work_handlers[NUM_CPL_CMDS] = {
2151 [CPL_ACT_ESTABLISH] = act_establish,
2152 [CPL_ACT_OPEN_RPL] = act_open_rpl,
2153 [CPL_RX_DATA] = rx_data,
2154 [CPL_TX_DMA_ACK] = tx_ack,
2155 [CPL_ABORT_RPL_RSS] = abort_rpl,
2156 [CPL_ABORT_RPL] = abort_rpl,
2157 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
2158 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
2159 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
2160 [CPL_PASS_ESTABLISH] = pass_establish,
2161 [CPL_PEER_CLOSE] = peer_close,
2162 [CPL_ABORT_REQ_RSS] = peer_abort,
2163 [CPL_CLOSE_CON_RPL] = close_con_rpl,
2164 [CPL_RDMA_TERMINATE] = terminate,
2165 [CPL_RDMA_EC_STATUS] = ec_status,
2166};
2167
2168static void process_work(struct work_struct *work)
2169{
2170 struct sk_buff *skb = NULL;
2171 void *ep;
2172 struct t3cdev *tdev;
2173 int ret;
2174
2175 while ((skb = skb_dequeue(&rxq))) {
2176 ep = *((void **) (skb->cb));
2177 tdev = *((struct t3cdev **) (skb->cb + sizeof(void *)));
2178 ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep);
2179 if (ret & CPL_RET_BUF_DONE)
2180 kfree_skb(skb);
2181
2182
2183
2184
2185 put_ep((struct iwch_ep_common *)ep);
2186 }
2187}
2188
2189static DECLARE_WORK(skb_work, process_work);
2190
2191static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
2192{
2193 struct iwch_ep_common *epc = ctx;
2194
2195 get_ep(epc);
2196
2197
2198
2199
2200 *((void **) skb->cb) = ctx;
2201 *((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev;
2202
2203
2204
2205
2206 skb_queue_tail(&rxq, skb);
2207 queue_work(workq, &skb_work);
2208 return 0;
2209}
2210
2211static int set_tcb_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
2212{
2213 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
2214
2215 if (rpl->status != CPL_ERR_NONE) {
2216 pr_err("Unexpected SET_TCB_RPL status %u for tid %u\n",
2217 rpl->status, GET_TID(rpl));
2218 }
2219 return CPL_RET_BUF_DONE;
2220}
2221
2222
2223
2224
2225
2226cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS] = {
2227 [CPL_ACT_ESTABLISH] = sched,
2228 [CPL_ACT_OPEN_RPL] = sched,
2229 [CPL_RX_DATA] = sched,
2230 [CPL_TX_DMA_ACK] = sched,
2231 [CPL_ABORT_RPL_RSS] = sched,
2232 [CPL_ABORT_RPL] = sched,
2233 [CPL_PASS_OPEN_RPL] = sched,
2234 [CPL_CLOSE_LISTSRV_RPL] = sched,
2235 [CPL_PASS_ACCEPT_REQ] = sched,
2236 [CPL_PASS_ESTABLISH] = sched,
2237 [CPL_PEER_CLOSE] = sched,
2238 [CPL_CLOSE_CON_RPL] = sched,
2239 [CPL_ABORT_REQ_RSS] = sched,
2240 [CPL_RDMA_TERMINATE] = sched,
2241 [CPL_RDMA_EC_STATUS] = sched,
2242 [CPL_SET_TCB_RPL] = set_tcb_rpl,
2243};
2244
2245int __init iwch_cm_init(void)
2246{
2247 skb_queue_head_init(&rxq);
2248
2249 workq = alloc_ordered_workqueue("iw_cxgb3", WQ_MEM_RECLAIM);
2250 if (!workq)
2251 return -ENOMEM;
2252
2253 return 0;
2254}
2255
2256void __exit iwch_cm_term(void)
2257{
2258 flush_workqueue(workq);
2259 destroy_workqueue(workq);
2260}
2261
