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x86/xen: resume timer irqs early
[linux/fpc-iii.git] / drivers / infiniband / hw / cxgb4 / cm.c
blob12fef76c791c524454bd9a0c48d5b4a967ac19af
1 /*
2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32 #include <linux/module.h>
33 #include <linux/list.h>
34 #include <linux/workqueue.h>
35 #include <linux/skbuff.h>
36 #include <linux/timer.h>
37 #include <linux/notifier.h>
38 #include <linux/inetdevice.h>
39 #include <linux/ip.h>
40 #include <linux/tcp.h>
41 #include <linux/if_vlan.h>
42
43 #include <net/neighbour.h>
44 #include <net/netevent.h>
45 #include <net/route.h>
46 #include <net/tcp.h>
47 #include <net/ip6_route.h>
48 #include <net/addrconf.h>
49
50 #include "iw_cxgb4.h"
51
52 static char *states[] = {
53 "idle",
54 "listen",
55 "connecting",
56 "mpa_wait_req",
57 "mpa_req_sent",
58 "mpa_req_rcvd",
59 "mpa_rep_sent",
60 "fpdu_mode",
61 "aborting",
62 "closing",
63 "moribund",
64 "dead",
65 NULL,
66 };
67
68 static int nocong;
69 module_param(nocong, int, 0644);
70 MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
71
72 static int enable_ecn;
73 module_param(enable_ecn, int, 0644);
74 MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
75
76 static int dack_mode = 1;
77 module_param(dack_mode, int, 0644);
78 MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
79
80 int c4iw_max_read_depth = 8;
81 module_param(c4iw_max_read_depth, int, 0644);
82 MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)");
83
84 static int enable_tcp_timestamps;
85 module_param(enable_tcp_timestamps, int, 0644);
86 MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
87
88 static int enable_tcp_sack;
89 module_param(enable_tcp_sack, int, 0644);
90 MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
91
92 static int enable_tcp_window_scaling = 1;
93 module_param(enable_tcp_window_scaling, int, 0644);
94 MODULE_PARM_DESC(enable_tcp_window_scaling,
95 "Enable tcp window scaling (default=1)");
96
97 int c4iw_debug;
98 module_param(c4iw_debug, int, 0644);
99 MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
100
101 static int peer2peer;
102 module_param(peer2peer, int, 0644);
103 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
104
105 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
106 module_param(p2p_type, int, 0644);
107 MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
108 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
109
110 static int ep_timeout_secs = 60;
111 module_param(ep_timeout_secs, int, 0644);
112 MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
113 "in seconds (default=60)");
114
115 static int mpa_rev = 1;
116 module_param(mpa_rev, int, 0644);
117 MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
118 "1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft"
119 " compliant (default=1)");
120
121 static int markers_enabled;
122 module_param(markers_enabled, int, 0644);
123 MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
124
125 static int crc_enabled = 1;
126 module_param(crc_enabled, int, 0644);
127 MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
128
129 static int rcv_win = 256 * 1024;
130 module_param(rcv_win, int, 0644);
131 MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
132
133 static int snd_win = 128 * 1024;
134 module_param(snd_win, int, 0644);
135 MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
136
137 static struct workqueue_struct *workq;
138
139 static struct sk_buff_head rxq;
140
141 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
142 static void ep_timeout(unsigned long arg);
143 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
144
145 static LIST_HEAD(timeout_list);
146 static spinlock_t timeout_lock;
147
148 static void deref_qp(struct c4iw_ep *ep)
149 {
150 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
151 clear_bit(QP_REFERENCED, &ep->com.flags);
152 }
153
154 static void ref_qp(struct c4iw_ep *ep)
155 {
156 set_bit(QP_REFERENCED, &ep->com.flags);
157 c4iw_qp_add_ref(&ep->com.qp->ibqp);
158 }
159
160 static void start_ep_timer(struct c4iw_ep *ep)
161 {
162 PDBG("%s ep %p\n", __func__, ep);
163 if (timer_pending(&ep->timer)) {
164 pr_err("%s timer already started! ep %p\n",
165 __func__, ep);
166 return;
167 }
168 clear_bit(TIMEOUT, &ep->com.flags);
169 c4iw_get_ep(&ep->com);
170 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
171 ep->timer.data = (unsigned long)ep;
172 ep->timer.function = ep_timeout;
173 add_timer(&ep->timer);
174 }
175
176 static void stop_ep_timer(struct c4iw_ep *ep)
177 {
178 PDBG("%s ep %p stopping\n", __func__, ep);
179 del_timer_sync(&ep->timer);
180 if (!test_and_set_bit(TIMEOUT, &ep->com.flags))
181 c4iw_put_ep(&ep->com);
182 }
183
184 static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
185 struct l2t_entry *l2e)
186 {
187 int error = 0;
188
189 if (c4iw_fatal_error(rdev)) {
190 kfree_skb(skb);
191 PDBG("%s - device in error state - dropping\n", __func__);
192 return -EIO;
193 }
194 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
195 if (error < 0)
196 kfree_skb(skb);
197 return error < 0 ? error : 0;
198 }
199
200 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
201 {
202 int error = 0;
203
204 if (c4iw_fatal_error(rdev)) {
205 kfree_skb(skb);
206 PDBG("%s - device in error state - dropping\n", __func__);
207 return -EIO;
208 }
209 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
210 if (error < 0)
211 kfree_skb(skb);
212 return error < 0 ? error : 0;
213 }
214
215 static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
216 {
217 struct cpl_tid_release *req;
218
219 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
220 if (!skb)
221 return;
222 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
223 INIT_TP_WR(req, hwtid);
224 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
225 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
226 c4iw_ofld_send(rdev, skb);
227 return;
228 }
229
230 static void set_emss(struct c4iw_ep *ep, u16 opt)
231 {
232 ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
233 ep->mss = ep->emss;
234 if (GET_TCPOPT_TSTAMP(opt))
235 ep->emss -= 12;
236 if (ep->emss < 128)
237 ep->emss = 128;
238 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
239 ep->mss, ep->emss);
240 }
241
242 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
243 {
244 enum c4iw_ep_state state;
245
246 mutex_lock(&epc->mutex);
247 state = epc->state;
248 mutex_unlock(&epc->mutex);
249 return state;
250 }
251
252 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
253 {
254 epc->state = new;
255 }
256
257 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
258 {
259 mutex_lock(&epc->mutex);
260 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
261 __state_set(epc, new);
262 mutex_unlock(&epc->mutex);
263 return;
264 }
265
266 static void *alloc_ep(int size, gfp_t gfp)
267 {
268 struct c4iw_ep_common *epc;
269
270 epc = kzalloc(size, gfp);
271 if (epc) {
272 kref_init(&epc->kref);
273 mutex_init(&epc->mutex);
274 c4iw_init_wr_wait(&epc->wr_wait);
275 }
276 PDBG("%s alloc ep %p\n", __func__, epc);
277 return epc;
278 }
279
280 void _c4iw_free_ep(struct kref *kref)
281 {
282 struct c4iw_ep *ep;
283
284 ep = container_of(kref, struct c4iw_ep, com.kref);
285 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
286 if (test_bit(QP_REFERENCED, &ep->com.flags))
287 deref_qp(ep);
288 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
289 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
290 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
291 dst_release(ep->dst);
292 cxgb4_l2t_release(ep->l2t);
293 }
294 kfree(ep);
295 }
296
297 static void release_ep_resources(struct c4iw_ep *ep)
298 {
299 set_bit(RELEASE_RESOURCES, &ep->com.flags);
300 c4iw_put_ep(&ep->com);
301 }
302
303 static int status2errno(int status)
304 {
305 switch (status) {
306 case CPL_ERR_NONE:
307 return 0;
308 case CPL_ERR_CONN_RESET:
309 return -ECONNRESET;
310 case CPL_ERR_ARP_MISS:
311 return -EHOSTUNREACH;
312 case CPL_ERR_CONN_TIMEDOUT:
313 return -ETIMEDOUT;
314 case CPL_ERR_TCAM_FULL:
315 return -ENOMEM;
316 case CPL_ERR_CONN_EXIST:
317 return -EADDRINUSE;
318 default:
319 return -EIO;
320 }
321 }
322
323 /*
324 * Try and reuse skbs already allocated...
325 */
326 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
327 {
328 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
329 skb_trim(skb, 0);
330 skb_get(skb);
331 skb_reset_transport_header(skb);
332 } else {
333 skb = alloc_skb(len, gfp);
334 }
335 t4_set_arp_err_handler(skb, NULL, NULL);
336 return skb;
337 }
338
339 static struct net_device *get_real_dev(struct net_device *egress_dev)
340 {
341 struct net_device *phys_dev = egress_dev;
342 if (egress_dev->priv_flags & IFF_802_1Q_VLAN)
343 phys_dev = vlan_dev_real_dev(egress_dev);
344 return phys_dev;
345 }
346
347 static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
348 {
349 int i;
350
351 egress_dev = get_real_dev(egress_dev);
352 for (i = 0; i < dev->rdev.lldi.nports; i++)
353 if (dev->rdev.lldi.ports[i] == egress_dev)
354 return 1;
355 return 0;
356 }
357
358 static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
359 __u8 *peer_ip, __be16 local_port,
360 __be16 peer_port, u8 tos,
361 __u32 sin6_scope_id)
362 {
363 struct dst_entry *dst = NULL;
364
365 if (IS_ENABLED(CONFIG_IPV6)) {
366 struct flowi6 fl6;
367
368 memset(&fl6, 0, sizeof(fl6));
369 memcpy(&fl6.daddr, peer_ip, 16);
370 memcpy(&fl6.saddr, local_ip, 16);
371 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
372 fl6.flowi6_oif = sin6_scope_id;
373 dst = ip6_route_output(&init_net, NULL, &fl6);
374 if (!dst)
375 goto out;
376 if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
377 !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
378 dst_release(dst);
379 dst = NULL;
380 }
381 }
382
383 out:
384 return dst;
385 }
386
387 static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip,
388 __be32 peer_ip, __be16 local_port,
389 __be16 peer_port, u8 tos)
390 {
391 struct rtable *rt;
392 struct flowi4 fl4;
393 struct neighbour *n;
394
395 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
396 peer_port, local_port, IPPROTO_TCP,
397 tos, 0);
398 if (IS_ERR(rt))
399 return NULL;
400 n = dst_neigh_lookup(&rt->dst, &peer_ip);
401 if (!n)
402 return NULL;
403 if (!our_interface(dev, n->dev)) {
404 dst_release(&rt->dst);
405 return NULL;
406 }
407 neigh_release(n);
408 return &rt->dst;
409 }
410
411 static void arp_failure_discard(void *handle, struct sk_buff *skb)
412 {
413 PDBG("%s c4iw_dev %p\n", __func__, handle);
414 kfree_skb(skb);
415 }
416
417 /*
418 * Handle an ARP failure for an active open.
419 */
420 static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
421 {
422 printk(KERN_ERR MOD "ARP failure duing connect\n");
423 kfree_skb(skb);
424 }
425
426 /*
427 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
428 * and send it along.
429 */
430 static void abort_arp_failure(void *handle, struct sk_buff *skb)
431 {
432 struct c4iw_rdev *rdev = handle;
433 struct cpl_abort_req *req = cplhdr(skb);
434
435 PDBG("%s rdev %p\n", __func__, rdev);
436 req->cmd = CPL_ABORT_NO_RST;
437 c4iw_ofld_send(rdev, skb);
438 }
439
440 static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
441 {
442 unsigned int flowclen = 80;
443 struct fw_flowc_wr *flowc;
444 int i;
445
446 skb = get_skb(skb, flowclen, GFP_KERNEL);
447 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
448
449 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
450 FW_FLOWC_WR_NPARAMS(8));
451 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
452 16)) | FW_WR_FLOWID(ep->hwtid));
453
454 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
455 flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
456 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
457 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
458 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
459 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
460 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
461 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
462 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
463 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
464 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
465 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
466 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
467 flowc->mnemval[6].val = cpu_to_be32(snd_win);
468 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
469 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
470 /* Pad WR to 16 byte boundary */
471 flowc->mnemval[8].mnemonic = 0;
472 flowc->mnemval[8].val = 0;
473 for (i = 0; i < 9; i++) {
474 flowc->mnemval[i].r4[0] = 0;
475 flowc->mnemval[i].r4[1] = 0;
476 flowc->mnemval[i].r4[2] = 0;
477 }
478
479 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
480 c4iw_ofld_send(&ep->com.dev->rdev, skb);
481 }
482
483 static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
484 {
485 struct cpl_close_con_req *req;
486 struct sk_buff *skb;
487 int wrlen = roundup(sizeof *req, 16);
488
489 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
490 skb = get_skb(NULL, wrlen, gfp);
491 if (!skb) {
492 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
493 return -ENOMEM;
494 }
495 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
496 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
497 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
498 memset(req, 0, wrlen);
499 INIT_TP_WR(req, ep->hwtid);
500 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
501 ep->hwtid));
502 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
503 }
504
505 static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
506 {
507 struct cpl_abort_req *req;
508 int wrlen = roundup(sizeof *req, 16);
509
510 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
511 skb = get_skb(skb, wrlen, gfp);
512 if (!skb) {
513 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
514 __func__);
515 return -ENOMEM;
516 }
517 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
518 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
519 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
520 memset(req, 0, wrlen);
521 INIT_TP_WR(req, ep->hwtid);
522 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
523 req->cmd = CPL_ABORT_SEND_RST;
524 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
525 }
526
527 #define VLAN_NONE 0xfff
528 #define FILTER_SEL_VLAN_NONE 0xffff
529 #define FILTER_SEL_WIDTH_P_FC (3+1) /* port uses 3 bits, FCoE one bit */
530 #define FILTER_SEL_WIDTH_VIN_P_FC \
531 (6 + 7 + FILTER_SEL_WIDTH_P_FC) /* 6 bits are unused, VF uses 7 bits*/
532 #define FILTER_SEL_WIDTH_TAG_P_FC \
533 (3 + FILTER_SEL_WIDTH_VIN_P_FC) /* PF uses 3 bits */
534 #define FILTER_SEL_WIDTH_VLD_TAG_P_FC (1 + FILTER_SEL_WIDTH_TAG_P_FC)
535
536 static unsigned int select_ntuple(struct c4iw_dev *dev, struct dst_entry *dst,
537 struct l2t_entry *l2t)
538 {
539 unsigned int ntuple = 0;
540 u32 viid;
541
542 switch (dev->rdev.lldi.filt_mode) {
543
544 /* default filter mode */
545 case HW_TPL_FR_MT_PR_IV_P_FC:
546 if (l2t->vlan == VLAN_NONE)
547 ntuple |= FILTER_SEL_VLAN_NONE << FILTER_SEL_WIDTH_P_FC;
548 else {
549 ntuple |= l2t->vlan << FILTER_SEL_WIDTH_P_FC;
550 ntuple |= 1 << FILTER_SEL_WIDTH_TAG_P_FC;
551 }
552 ntuple |= l2t->lport << S_PORT | IPPROTO_TCP <<
553 FILTER_SEL_WIDTH_VLD_TAG_P_FC;
554 break;
555 case HW_TPL_FR_MT_PR_OV_P_FC: {
556 viid = cxgb4_port_viid(l2t->neigh->dev);
557
558 ntuple |= FW_VIID_VIN_GET(viid) << FILTER_SEL_WIDTH_P_FC;
559 ntuple |= FW_VIID_PFN_GET(viid) << FILTER_SEL_WIDTH_VIN_P_FC;
560 ntuple |= FW_VIID_VIVLD_GET(viid) << FILTER_SEL_WIDTH_TAG_P_FC;
561 ntuple |= l2t->lport << S_PORT | IPPROTO_TCP <<
562 FILTER_SEL_WIDTH_VLD_TAG_P_FC;
563 break;
564 }
565 default:
566 break;
567 }
568 return ntuple;
569 }
570
571 static int send_connect(struct c4iw_ep *ep)
572 {
573 struct cpl_act_open_req *req;
574 struct cpl_t5_act_open_req *t5_req;
575 struct cpl_act_open_req6 *req6;
576 struct cpl_t5_act_open_req6 *t5_req6;
577 struct sk_buff *skb;
578 u64 opt0;
579 u32 opt2;
580 unsigned int mtu_idx;
581 int wscale;
582 int wrlen;
583 int sizev4 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
584 sizeof(struct cpl_act_open_req) :
585 sizeof(struct cpl_t5_act_open_req);
586 int sizev6 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
587 sizeof(struct cpl_act_open_req6) :
588 sizeof(struct cpl_t5_act_open_req6);
589 struct sockaddr_in *la = (struct sockaddr_in *)&ep->com.local_addr;
590 struct sockaddr_in *ra = (struct sockaddr_in *)&ep->com.remote_addr;
591 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
592 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
593
594 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
595 roundup(sizev4, 16) :
596 roundup(sizev6, 16);
597
598 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
599
600 skb = get_skb(NULL, wrlen, GFP_KERNEL);
601 if (!skb) {
602 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
603 __func__);
604 return -ENOMEM;
605 }
606 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
607
608 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
609 wscale = compute_wscale(rcv_win);
610 opt0 = (nocong ? NO_CONG(1) : 0) |
611 KEEP_ALIVE(1) |
612 DELACK(1) |
613 WND_SCALE(wscale) |
614 MSS_IDX(mtu_idx) |
615 L2T_IDX(ep->l2t->idx) |
616 TX_CHAN(ep->tx_chan) |
617 SMAC_SEL(ep->smac_idx) |
618 DSCP(ep->tos) |
619 ULP_MODE(ULP_MODE_TCPDDP) |
620 RCV_BUFSIZ(rcv_win>>10);
621 opt2 = RX_CHANNEL(0) |
622 CCTRL_ECN(enable_ecn) |
623 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
624 if (enable_tcp_timestamps)
625 opt2 |= TSTAMPS_EN(1);
626 if (enable_tcp_sack)
627 opt2 |= SACK_EN(1);
628 if (wscale && enable_tcp_window_scaling)
629 opt2 |= WND_SCALE_EN(1);
630 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
631
632 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
633 if (ep->com.remote_addr.ss_family == AF_INET) {
634 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
635 INIT_TP_WR(req, 0);
636 OPCODE_TID(req) = cpu_to_be32(
637 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
638 ((ep->rss_qid << 14) | ep->atid)));
639 req->local_port = la->sin_port;
640 req->peer_port = ra->sin_port;
641 req->local_ip = la->sin_addr.s_addr;
642 req->peer_ip = ra->sin_addr.s_addr;
643 req->opt0 = cpu_to_be64(opt0);
644 req->params = cpu_to_be32(select_ntuple(ep->com.dev,
645 ep->dst, ep->l2t));
646 req->opt2 = cpu_to_be32(opt2);
647 } else {
648 req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
649
650 INIT_TP_WR(req6, 0);
651 OPCODE_TID(req6) = cpu_to_be32(
652 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
653 ((ep->rss_qid<<14)|ep->atid)));
654 req6->local_port = la6->sin6_port;
655 req6->peer_port = ra6->sin6_port;
656 req6->local_ip_hi = *((__be64 *)
657 (la6->sin6_addr.s6_addr));
658 req6->local_ip_lo = *((__be64 *)
659 (la6->sin6_addr.s6_addr + 8));
660 req6->peer_ip_hi = *((__be64 *)
661 (ra6->sin6_addr.s6_addr));
662 req6->peer_ip_lo = *((__be64 *)
663 (ra6->sin6_addr.s6_addr + 8));
664 req6->opt0 = cpu_to_be64(opt0);
665 req6->params = cpu_to_be32(
666 select_ntuple(ep->com.dev, ep->dst,
667 ep->l2t));
668 req6->opt2 = cpu_to_be32(opt2);
669 }
670 } else {
671 if (ep->com.remote_addr.ss_family == AF_INET) {
672 t5_req = (struct cpl_t5_act_open_req *)
673 skb_put(skb, wrlen);
674 INIT_TP_WR(t5_req, 0);
675 OPCODE_TID(t5_req) = cpu_to_be32(
676 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
677 ((ep->rss_qid << 14) | ep->atid)));
678 t5_req->local_port = la->sin_port;
679 t5_req->peer_port = ra->sin_port;
680 t5_req->local_ip = la->sin_addr.s_addr;
681 t5_req->peer_ip = ra->sin_addr.s_addr;
682 t5_req->opt0 = cpu_to_be64(opt0);
683 t5_req->params = cpu_to_be64(V_FILTER_TUPLE(
684 select_ntuple(ep->com.dev,
685 ep->dst, ep->l2t)));
686 t5_req->opt2 = cpu_to_be32(opt2);
687 } else {
688 t5_req6 = (struct cpl_t5_act_open_req6 *)
689 skb_put(skb, wrlen);
690 INIT_TP_WR(t5_req6, 0);
691 OPCODE_TID(t5_req6) = cpu_to_be32(
692 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
693 ((ep->rss_qid<<14)|ep->atid)));
694 t5_req6->local_port = la6->sin6_port;
695 t5_req6->peer_port = ra6->sin6_port;
696 t5_req6->local_ip_hi = *((__be64 *)
697 (la6->sin6_addr.s6_addr));
698 t5_req6->local_ip_lo = *((__be64 *)
699 (la6->sin6_addr.s6_addr + 8));
700 t5_req6->peer_ip_hi = *((__be64 *)
701 (ra6->sin6_addr.s6_addr));
702 t5_req6->peer_ip_lo = *((__be64 *)
703 (ra6->sin6_addr.s6_addr + 8));
704 t5_req6->opt0 = cpu_to_be64(opt0);
705 t5_req6->params = (__force __be64)cpu_to_be32(
706 select_ntuple(ep->com.dev, ep->dst, ep->l2t));
707 t5_req6->opt2 = cpu_to_be32(opt2);
708 }
709 }
710
711 set_bit(ACT_OPEN_REQ, &ep->com.history);
712 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
713 }
714
715 static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
716 u8 mpa_rev_to_use)
717 {
718 int mpalen, wrlen;
719 struct fw_ofld_tx_data_wr *req;
720 struct mpa_message *mpa;
721 struct mpa_v2_conn_params mpa_v2_params;
722
723 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
724
725 BUG_ON(skb_cloned(skb));
726
727 mpalen = sizeof(*mpa) + ep->plen;
728 if (mpa_rev_to_use == 2)
729 mpalen += sizeof(struct mpa_v2_conn_params);
730 wrlen = roundup(mpalen + sizeof *req, 16);
731 skb = get_skb(skb, wrlen, GFP_KERNEL);
732 if (!skb) {
733 connect_reply_upcall(ep, -ENOMEM);
734 return;
735 }
736 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
737
738 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
739 memset(req, 0, wrlen);
740 req->op_to_immdlen = cpu_to_be32(
741 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
742 FW_WR_COMPL(1) |
743 FW_WR_IMMDLEN(mpalen));
744 req->flowid_len16 = cpu_to_be32(
745 FW_WR_FLOWID(ep->hwtid) |
746 FW_WR_LEN16(wrlen >> 4));
747 req->plen = cpu_to_be32(mpalen);
748 req->tunnel_to_proxy = cpu_to_be32(
749 FW_OFLD_TX_DATA_WR_FLUSH(1) |
750 FW_OFLD_TX_DATA_WR_SHOVE(1));
751
752 mpa = (struct mpa_message *)(req + 1);
753 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
754 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
755 (markers_enabled ? MPA_MARKERS : 0) |
756 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
757 mpa->private_data_size = htons(ep->plen);
758 mpa->revision = mpa_rev_to_use;
759 if (mpa_rev_to_use == 1) {
760 ep->tried_with_mpa_v1 = 1;
761 ep->retry_with_mpa_v1 = 0;
762 }
763
764 if (mpa_rev_to_use == 2) {
765 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
766 sizeof (struct mpa_v2_conn_params));
767 mpa_v2_params.ird = htons((u16)ep->ird);
768 mpa_v2_params.ord = htons((u16)ep->ord);
769
770 if (peer2peer) {
771 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
772 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
773 mpa_v2_params.ord |=
774 htons(MPA_V2_RDMA_WRITE_RTR);
775 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
776 mpa_v2_params.ord |=
777 htons(MPA_V2_RDMA_READ_RTR);
778 }
779 memcpy(mpa->private_data, &mpa_v2_params,
780 sizeof(struct mpa_v2_conn_params));
781
782 if (ep->plen)
783 memcpy(mpa->private_data +
784 sizeof(struct mpa_v2_conn_params),
785 ep->mpa_pkt + sizeof(*mpa), ep->plen);
786 } else
787 if (ep->plen)
788 memcpy(mpa->private_data,
789 ep->mpa_pkt + sizeof(*mpa), ep->plen);
790
791 /*
792 * Reference the mpa skb. This ensures the data area
793 * will remain in memory until the hw acks the tx.
794 * Function fw4_ack() will deref it.
795 */
796 skb_get(skb);
797 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
798 BUG_ON(ep->mpa_skb);
799 ep->mpa_skb = skb;
800 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
801 start_ep_timer(ep);
802 state_set(&ep->com, MPA_REQ_SENT);
803 ep->mpa_attr.initiator = 1;
804 return;
805 }
806
807 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
808 {
809 int mpalen, wrlen;
810 struct fw_ofld_tx_data_wr *req;
811 struct mpa_message *mpa;
812 struct sk_buff *skb;
813 struct mpa_v2_conn_params mpa_v2_params;
814
815 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
816
817 mpalen = sizeof(*mpa) + plen;
818 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
819 mpalen += sizeof(struct mpa_v2_conn_params);
820 wrlen = roundup(mpalen + sizeof *req, 16);
821
822 skb = get_skb(NULL, wrlen, GFP_KERNEL);
823 if (!skb) {
824 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
825 return -ENOMEM;
826 }
827 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
828
829 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
830 memset(req, 0, wrlen);
831 req->op_to_immdlen = cpu_to_be32(
832 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
833 FW_WR_COMPL(1) |
834 FW_WR_IMMDLEN(mpalen));
835 req->flowid_len16 = cpu_to_be32(
836 FW_WR_FLOWID(ep->hwtid) |
837 FW_WR_LEN16(wrlen >> 4));
838 req->plen = cpu_to_be32(mpalen);
839 req->tunnel_to_proxy = cpu_to_be32(
840 FW_OFLD_TX_DATA_WR_FLUSH(1) |
841 FW_OFLD_TX_DATA_WR_SHOVE(1));
842
843 mpa = (struct mpa_message *)(req + 1);
844 memset(mpa, 0, sizeof(*mpa));
845 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
846 mpa->flags = MPA_REJECT;
847 mpa->revision = ep->mpa_attr.version;
848 mpa->private_data_size = htons(plen);
849
850 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
851 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
852 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
853 sizeof (struct mpa_v2_conn_params));
854 mpa_v2_params.ird = htons(((u16)ep->ird) |
855 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
856 0));
857 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
858 (p2p_type ==
859 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
860 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
861 FW_RI_INIT_P2PTYPE_READ_REQ ?
862 MPA_V2_RDMA_READ_RTR : 0) : 0));
863 memcpy(mpa->private_data, &mpa_v2_params,
864 sizeof(struct mpa_v2_conn_params));
865
866 if (ep->plen)
867 memcpy(mpa->private_data +
868 sizeof(struct mpa_v2_conn_params), pdata, plen);
869 } else
870 if (plen)
871 memcpy(mpa->private_data, pdata, plen);
872
873 /*
874 * Reference the mpa skb again. This ensures the data area
875 * will remain in memory until the hw acks the tx.
876 * Function fw4_ack() will deref it.
877 */
878 skb_get(skb);
879 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
880 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
881 BUG_ON(ep->mpa_skb);
882 ep->mpa_skb = skb;
883 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
884 }
885
886 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
887 {
888 int mpalen, wrlen;
889 struct fw_ofld_tx_data_wr *req;
890 struct mpa_message *mpa;
891 struct sk_buff *skb;
892 struct mpa_v2_conn_params mpa_v2_params;
893
894 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
895
896 mpalen = sizeof(*mpa) + plen;
897 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
898 mpalen += sizeof(struct mpa_v2_conn_params);
899 wrlen = roundup(mpalen + sizeof *req, 16);
900
901 skb = get_skb(NULL, wrlen, GFP_KERNEL);
902 if (!skb) {
903 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
904 return -ENOMEM;
905 }
906 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
907
908 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
909 memset(req, 0, wrlen);
910 req->op_to_immdlen = cpu_to_be32(
911 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
912 FW_WR_COMPL(1) |
913 FW_WR_IMMDLEN(mpalen));
914 req->flowid_len16 = cpu_to_be32(
915 FW_WR_FLOWID(ep->hwtid) |
916 FW_WR_LEN16(wrlen >> 4));
917 req->plen = cpu_to_be32(mpalen);
918 req->tunnel_to_proxy = cpu_to_be32(
919 FW_OFLD_TX_DATA_WR_FLUSH(1) |
920 FW_OFLD_TX_DATA_WR_SHOVE(1));
921
922 mpa = (struct mpa_message *)(req + 1);
923 memset(mpa, 0, sizeof(*mpa));
924 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
925 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
926 (markers_enabled ? MPA_MARKERS : 0);
927 mpa->revision = ep->mpa_attr.version;
928 mpa->private_data_size = htons(plen);
929
930 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
931 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
932 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
933 sizeof (struct mpa_v2_conn_params));
934 mpa_v2_params.ird = htons((u16)ep->ird);
935 mpa_v2_params.ord = htons((u16)ep->ord);
936 if (peer2peer && (ep->mpa_attr.p2p_type !=
937 FW_RI_INIT_P2PTYPE_DISABLED)) {
938 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
939
940 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
941 mpa_v2_params.ord |=
942 htons(MPA_V2_RDMA_WRITE_RTR);
943 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
944 mpa_v2_params.ord |=
945 htons(MPA_V2_RDMA_READ_RTR);
946 }
947
948 memcpy(mpa->private_data, &mpa_v2_params,
949 sizeof(struct mpa_v2_conn_params));
950
951 if (ep->plen)
952 memcpy(mpa->private_data +
953 sizeof(struct mpa_v2_conn_params), pdata, plen);
954 } else
955 if (plen)
956 memcpy(mpa->private_data, pdata, plen);
957
958 /*
959 * Reference the mpa skb. This ensures the data area
960 * will remain in memory until the hw acks the tx.
961 * Function fw4_ack() will deref it.
962 */
963 skb_get(skb);
964 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
965 ep->mpa_skb = skb;
966 state_set(&ep->com, MPA_REP_SENT);
967 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
968 }
969
970 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
971 {
972 struct c4iw_ep *ep;
973 struct cpl_act_establish *req = cplhdr(skb);
974 unsigned int tid = GET_TID(req);
975 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
976 struct tid_info *t = dev->rdev.lldi.tids;
977
978 ep = lookup_atid(t, atid);
979
980 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
981 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
982
983 dst_confirm(ep->dst);
984
985 /* setup the hwtid for this connection */
986 ep->hwtid = tid;
987 cxgb4_insert_tid(t, ep, tid);
988 insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
989
990 ep->snd_seq = be32_to_cpu(req->snd_isn);
991 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
992
993 set_emss(ep, ntohs(req->tcp_opt));
994
995 /* dealloc the atid */
996 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
997 cxgb4_free_atid(t, atid);
998 set_bit(ACT_ESTAB, &ep->com.history);
999
1000 /* start MPA negotiation */
1001 send_flowc(ep, NULL);
1002 if (ep->retry_with_mpa_v1)
1003 send_mpa_req(ep, skb, 1);
1004 else
1005 send_mpa_req(ep, skb, mpa_rev);
1006
1007 return 0;
1008 }
1009
1010 static void close_complete_upcall(struct c4iw_ep *ep)
1011 {
1012 struct iw_cm_event event;
1013
1014 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1015 memset(&event, 0, sizeof(event));
1016 event.event = IW_CM_EVENT_CLOSE;
1017 if (ep->com.cm_id) {
1018 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
1019 ep, ep->com.cm_id, ep->hwtid);
1020 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1021 ep->com.cm_id->rem_ref(ep->com.cm_id);
1022 ep->com.cm_id = NULL;
1023 set_bit(CLOSE_UPCALL, &ep->com.history);
1024 }
1025 }
1026
1027 static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
1028 {
1029 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1030 close_complete_upcall(ep);
1031 state_set(&ep->com, ABORTING);
1032 set_bit(ABORT_CONN, &ep->com.history);
1033 return send_abort(ep, skb, gfp);
1034 }
1035
1036 static void peer_close_upcall(struct c4iw_ep *ep)
1037 {
1038 struct iw_cm_event event;
1039
1040 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1041 memset(&event, 0, sizeof(event));
1042 event.event = IW_CM_EVENT_DISCONNECT;
1043 if (ep->com.cm_id) {
1044 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
1045 ep, ep->com.cm_id, ep->hwtid);
1046 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1047 set_bit(DISCONN_UPCALL, &ep->com.history);
1048 }
1049 }
1050
1051 static void peer_abort_upcall(struct c4iw_ep *ep)
1052 {
1053 struct iw_cm_event event;
1054
1055 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1056 memset(&event, 0, sizeof(event));
1057 event.event = IW_CM_EVENT_CLOSE;
1058 event.status = -ECONNRESET;
1059 if (ep->com.cm_id) {
1060 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
1061 ep->com.cm_id, ep->hwtid);
1062 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1063 ep->com.cm_id->rem_ref(ep->com.cm_id);
1064 ep->com.cm_id = NULL;
1065 set_bit(ABORT_UPCALL, &ep->com.history);
1066 }
1067 }
1068
1069 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1070 {
1071 struct iw_cm_event event;
1072
1073 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
1074 memset(&event, 0, sizeof(event));
1075 event.event = IW_CM_EVENT_CONNECT_REPLY;
1076 event.status = status;
1077 memcpy(&event.local_addr, &ep->com.local_addr,
1078 sizeof(ep->com.local_addr));
1079 memcpy(&event.remote_addr, &ep->com.remote_addr,
1080 sizeof(ep->com.remote_addr));
1081
1082 if ((status == 0) || (status == -ECONNREFUSED)) {
1083 if (!ep->tried_with_mpa_v1) {
1084 /* this means MPA_v2 is used */
1085 event.private_data_len = ep->plen -
1086 sizeof(struct mpa_v2_conn_params);
1087 event.private_data = ep->mpa_pkt +
1088 sizeof(struct mpa_message) +
1089 sizeof(struct mpa_v2_conn_params);
1090 } else {
1091 /* this means MPA_v1 is used */
1092 event.private_data_len = ep->plen;
1093 event.private_data = ep->mpa_pkt +
1094 sizeof(struct mpa_message);
1095 }
1096 }
1097
1098 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
1099 ep->hwtid, status);
1100 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1101 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1102
1103 if (status < 0) {
1104 ep->com.cm_id->rem_ref(ep->com.cm_id);
1105 ep->com.cm_id = NULL;
1106 }
1107 }
1108
1109 static void connect_request_upcall(struct c4iw_ep *ep)
1110 {
1111 struct iw_cm_event event;
1112
1113 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1114 memset(&event, 0, sizeof(event));
1115 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1116 memcpy(&event.local_addr, &ep->com.local_addr,
1117 sizeof(ep->com.local_addr));
1118 memcpy(&event.remote_addr, &ep->com.remote_addr,
1119 sizeof(ep->com.remote_addr));
1120 event.provider_data = ep;
1121 if (!ep->tried_with_mpa_v1) {
1122 /* this means MPA_v2 is used */
1123 event.ord = ep->ord;
1124 event.ird = ep->ird;
1125 event.private_data_len = ep->plen -
1126 sizeof(struct mpa_v2_conn_params);
1127 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1128 sizeof(struct mpa_v2_conn_params);
1129 } else {
1130 /* this means MPA_v1 is used. Send max supported */
1131 event.ord = c4iw_max_read_depth;
1132 event.ird = c4iw_max_read_depth;
1133 event.private_data_len = ep->plen;
1134 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1135 }
1136 if (state_read(&ep->parent_ep->com) != DEAD) {
1137 c4iw_get_ep(&ep->com);
1138 ep->parent_ep->com.cm_id->event_handler(
1139 ep->parent_ep->com.cm_id,
1140 &event);
1141 }
1142 set_bit(CONNREQ_UPCALL, &ep->com.history);
1143 c4iw_put_ep(&ep->parent_ep->com);
1144 ep->parent_ep = NULL;
1145 }
1146
1147 static void established_upcall(struct c4iw_ep *ep)
1148 {
1149 struct iw_cm_event event;
1150
1151 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1152 memset(&event, 0, sizeof(event));
1153 event.event = IW_CM_EVENT_ESTABLISHED;
1154 event.ird = ep->ird;
1155 event.ord = ep->ord;
1156 if (ep->com.cm_id) {
1157 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1158 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1159 set_bit(ESTAB_UPCALL, &ep->com.history);
1160 }
1161 }
1162
1163 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1164 {
1165 struct cpl_rx_data_ack *req;
1166 struct sk_buff *skb;
1167 int wrlen = roundup(sizeof *req, 16);
1168
1169 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1170 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1171 if (!skb) {
1172 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
1173 return 0;
1174 }
1175
1176 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
1177 memset(req, 0, wrlen);
1178 INIT_TP_WR(req, ep->hwtid);
1179 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
1180 ep->hwtid));
1181 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
1182 F_RX_DACK_CHANGE |
1183 V_RX_DACK_MODE(dack_mode));
1184 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1185 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1186 return credits;
1187 }
1188
1189 static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1190 {
1191 struct mpa_message *mpa;
1192 struct mpa_v2_conn_params *mpa_v2_params;
1193 u16 plen;
1194 u16 resp_ird, resp_ord;
1195 u8 rtr_mismatch = 0, insuff_ird = 0;
1196 struct c4iw_qp_attributes attrs;
1197 enum c4iw_qp_attr_mask mask;
1198 int err;
1199
1200 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1201
1202 /*
1203 * Stop mpa timer. If it expired, then the state has
1204 * changed and we bail since ep_timeout already aborted
1205 * the connection.
1206 */
1207 stop_ep_timer(ep);
1208 if (state_read(&ep->com) != MPA_REQ_SENT)
1209 return;
1210
1211 /*
1212 * If we get more than the supported amount of private data
1213 * then we must fail this connection.
1214 */
1215 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1216 err = -EINVAL;
1217 goto err;
1218 }
1219
1220 /*
1221 * copy the new data into our accumulation buffer.
1222 */
1223 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1224 skb->len);
1225 ep->mpa_pkt_len += skb->len;
1226
1227 /*
1228 * if we don't even have the mpa message, then bail.
1229 */
1230 if (ep->mpa_pkt_len < sizeof(*mpa))
1231 return;
1232 mpa = (struct mpa_message *) ep->mpa_pkt;
1233
1234 /* Validate MPA header. */
1235 if (mpa->revision > mpa_rev) {
1236 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1237 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1238 err = -EPROTO;
1239 goto err;
1240 }
1241 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1242 err = -EPROTO;
1243 goto err;
1244 }
1245
1246 plen = ntohs(mpa->private_data_size);
1247
1248 /*
1249 * Fail if there's too much private data.
1250 */
1251 if (plen > MPA_MAX_PRIVATE_DATA) {
1252 err = -EPROTO;
1253 goto err;
1254 }
1255
1256 /*
1257 * If plen does not account for pkt size
1258 */
1259 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1260 err = -EPROTO;
1261 goto err;
1262 }
1263
1264 ep->plen = (u8) plen;
1265
1266 /*
1267 * If we don't have all the pdata yet, then bail.
1268 * We'll continue process when more data arrives.
1269 */
1270 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1271 return;
1272
1273 if (mpa->flags & MPA_REJECT) {
1274 err = -ECONNREFUSED;
1275 goto err;
1276 }
1277
1278 /*
1279 * If we get here we have accumulated the entire mpa
1280 * start reply message including private data. And
1281 * the MPA header is valid.
1282 */
1283 state_set(&ep->com, FPDU_MODE);
1284 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1285 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1286 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1287 ep->mpa_attr.version = mpa->revision;
1288 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1289
1290 if (mpa->revision == 2) {
1291 ep->mpa_attr.enhanced_rdma_conn =
1292 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1293 if (ep->mpa_attr.enhanced_rdma_conn) {
1294 mpa_v2_params = (struct mpa_v2_conn_params *)
1295 (ep->mpa_pkt + sizeof(*mpa));
1296 resp_ird = ntohs(mpa_v2_params->ird) &
1297 MPA_V2_IRD_ORD_MASK;
1298 resp_ord = ntohs(mpa_v2_params->ord) &
1299 MPA_V2_IRD_ORD_MASK;
1300
1301 /*
1302 * This is a double-check. Ideally, below checks are
1303 * not required since ird/ord stuff has been taken
1304 * care of in c4iw_accept_cr
1305 */
1306 if ((ep->ird < resp_ord) || (ep->ord > resp_ird)) {
1307 err = -ENOMEM;
1308 ep->ird = resp_ord;
1309 ep->ord = resp_ird;
1310 insuff_ird = 1;
1311 }
1312
1313 if (ntohs(mpa_v2_params->ird) &
1314 MPA_V2_PEER2PEER_MODEL) {
1315 if (ntohs(mpa_v2_params->ord) &
1316 MPA_V2_RDMA_WRITE_RTR)
1317 ep->mpa_attr.p2p_type =
1318 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1319 else if (ntohs(mpa_v2_params->ord) &
1320 MPA_V2_RDMA_READ_RTR)
1321 ep->mpa_attr.p2p_type =
1322 FW_RI_INIT_P2PTYPE_READ_REQ;
1323 }
1324 }
1325 } else if (mpa->revision == 1)
1326 if (peer2peer)
1327 ep->mpa_attr.p2p_type = p2p_type;
1328
1329 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1330 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1331 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1332 ep->mpa_attr.recv_marker_enabled,
1333 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1334 ep->mpa_attr.p2p_type, p2p_type);
1335
1336 /*
1337 * If responder's RTR does not match with that of initiator, assign
1338 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1339 * generated when moving QP to RTS state.
1340 * A TERM message will be sent after QP has moved to RTS state
1341 */
1342 if ((ep->mpa_attr.version == 2) && peer2peer &&
1343 (ep->mpa_attr.p2p_type != p2p_type)) {
1344 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1345 rtr_mismatch = 1;
1346 }
1347
1348 attrs.mpa_attr = ep->mpa_attr;
1349 attrs.max_ird = ep->ird;
1350 attrs.max_ord = ep->ord;
1351 attrs.llp_stream_handle = ep;
1352 attrs.next_state = C4IW_QP_STATE_RTS;
1353
1354 mask = C4IW_QP_ATTR_NEXT_STATE |
1355 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1356 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1357
1358 /* bind QP and TID with INIT_WR */
1359 err = c4iw_modify_qp(ep->com.qp->rhp,
1360 ep->com.qp, mask, &attrs, 1);
1361 if (err)
1362 goto err;
1363
1364 /*
1365 * If responder's RTR requirement did not match with what initiator
1366 * supports, generate TERM message
1367 */
1368 if (rtr_mismatch) {
1369 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1370 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1371 attrs.ecode = MPA_NOMATCH_RTR;
1372 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1373 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1374 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1375 err = -ENOMEM;
1376 goto out;
1377 }
1378
1379 /*
1380 * Generate TERM if initiator IRD is not sufficient for responder
1381 * provided ORD. Currently, we do the same behaviour even when
1382 * responder provided IRD is also not sufficient as regards to
1383 * initiator ORD.
1384 */
1385 if (insuff_ird) {
1386 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1387 __func__);
1388 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1389 attrs.ecode = MPA_INSUFF_IRD;
1390 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1391 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1392 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1393 err = -ENOMEM;
1394 goto out;
1395 }
1396 goto out;
1397 err:
1398 state_set(&ep->com, ABORTING);
1399 send_abort(ep, skb, GFP_KERNEL);
1400 out:
1401 connect_reply_upcall(ep, err);
1402 return;
1403 }
1404
1405 static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1406 {
1407 struct mpa_message *mpa;
1408 struct mpa_v2_conn_params *mpa_v2_params;
1409 u16 plen;
1410
1411 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1412
1413 if (state_read(&ep->com) != MPA_REQ_WAIT)
1414 return;
1415
1416 /*
1417 * If we get more than the supported amount of private data
1418 * then we must fail this connection.
1419 */
1420 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1421 stop_ep_timer(ep);
1422 abort_connection(ep, skb, GFP_KERNEL);
1423 return;
1424 }
1425
1426 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1427
1428 /*
1429 * Copy the new data into our accumulation buffer.
1430 */
1431 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1432 skb->len);
1433 ep->mpa_pkt_len += skb->len;
1434
1435 /*
1436 * If we don't even have the mpa message, then bail.
1437 * We'll continue process when more data arrives.
1438 */
1439 if (ep->mpa_pkt_len < sizeof(*mpa))
1440 return;
1441
1442 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1443 stop_ep_timer(ep);
1444 mpa = (struct mpa_message *) ep->mpa_pkt;
1445
1446 /*
1447 * Validate MPA Header.
1448 */
1449 if (mpa->revision > mpa_rev) {
1450 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1451 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1452 stop_ep_timer(ep);
1453 abort_connection(ep, skb, GFP_KERNEL);
1454 return;
1455 }
1456
1457 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1458 stop_ep_timer(ep);
1459 abort_connection(ep, skb, GFP_KERNEL);
1460 return;
1461 }
1462
1463 plen = ntohs(mpa->private_data_size);
1464
1465 /*
1466 * Fail if there's too much private data.
1467 */
1468 if (plen > MPA_MAX_PRIVATE_DATA) {
1469 stop_ep_timer(ep);
1470 abort_connection(ep, skb, GFP_KERNEL);
1471 return;
1472 }
1473
1474 /*
1475 * If plen does not account for pkt size
1476 */
1477 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1478 stop_ep_timer(ep);
1479 abort_connection(ep, skb, GFP_KERNEL);
1480 return;
1481 }
1482 ep->plen = (u8) plen;
1483
1484 /*
1485 * If we don't have all the pdata yet, then bail.
1486 */
1487 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1488 return;
1489
1490 /*
1491 * If we get here we have accumulated the entire mpa
1492 * start reply message including private data.
1493 */
1494 ep->mpa_attr.initiator = 0;
1495 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1496 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1497 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1498 ep->mpa_attr.version = mpa->revision;
1499 if (mpa->revision == 1)
1500 ep->tried_with_mpa_v1 = 1;
1501 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1502
1503 if (mpa->revision == 2) {
1504 ep->mpa_attr.enhanced_rdma_conn =
1505 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1506 if (ep->mpa_attr.enhanced_rdma_conn) {
1507 mpa_v2_params = (struct mpa_v2_conn_params *)
1508 (ep->mpa_pkt + sizeof(*mpa));
1509 ep->ird = ntohs(mpa_v2_params->ird) &
1510 MPA_V2_IRD_ORD_MASK;
1511 ep->ord = ntohs(mpa_v2_params->ord) &
1512 MPA_V2_IRD_ORD_MASK;
1513 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1514 if (peer2peer) {
1515 if (ntohs(mpa_v2_params->ord) &
1516 MPA_V2_RDMA_WRITE_RTR)
1517 ep->mpa_attr.p2p_type =
1518 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1519 else if (ntohs(mpa_v2_params->ord) &
1520 MPA_V2_RDMA_READ_RTR)
1521 ep->mpa_attr.p2p_type =
1522 FW_RI_INIT_P2PTYPE_READ_REQ;
1523 }
1524 }
1525 } else if (mpa->revision == 1)
1526 if (peer2peer)
1527 ep->mpa_attr.p2p_type = p2p_type;
1528
1529 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1530 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1531 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1532 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1533 ep->mpa_attr.p2p_type);
1534
1535 state_set(&ep->com, MPA_REQ_RCVD);
1536
1537 /* drive upcall */
1538 connect_request_upcall(ep);
1539 return;
1540 }
1541
1542 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1543 {
1544 struct c4iw_ep *ep;
1545 struct cpl_rx_data *hdr = cplhdr(skb);
1546 unsigned int dlen = ntohs(hdr->len);
1547 unsigned int tid = GET_TID(hdr);
1548 struct tid_info *t = dev->rdev.lldi.tids;
1549 __u8 status = hdr->status;
1550
1551 ep = lookup_tid(t, tid);
1552 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1553 skb_pull(skb, sizeof(*hdr));
1554 skb_trim(skb, dlen);
1555
1556 /* update RX credits */
1557 update_rx_credits(ep, dlen);
1558
1559 switch (state_read(&ep->com)) {
1560 case MPA_REQ_SENT:
1561 ep->rcv_seq += dlen;
1562 process_mpa_reply(ep, skb);
1563 break;
1564 case MPA_REQ_WAIT:
1565 ep->rcv_seq += dlen;
1566 process_mpa_request(ep, skb);
1567 break;
1568 case FPDU_MODE: {
1569 struct c4iw_qp_attributes attrs;
1570 BUG_ON(!ep->com.qp);
1571 if (status)
1572 pr_err("%s Unexpected streaming data." \
1573 " qpid %u ep %p state %d tid %u status %d\n",
1574 __func__, ep->com.qp->wq.sq.qid, ep,
1575 state_read(&ep->com), ep->hwtid, status);
1576 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1577 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1578 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1579 break;
1580 }
1581 default:
1582 break;
1583 }
1584 return 0;
1585 }
1586
1587 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1588 {
1589 struct c4iw_ep *ep;
1590 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1591 int release = 0;
1592 unsigned int tid = GET_TID(rpl);
1593 struct tid_info *t = dev->rdev.lldi.tids;
1594
1595 ep = lookup_tid(t, tid);
1596 if (!ep) {
1597 printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
1598 return 0;
1599 }
1600 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1601 mutex_lock(&ep->com.mutex);
1602 switch (ep->com.state) {
1603 case ABORTING:
1604 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1605 __state_set(&ep->com, DEAD);
1606 release = 1;
1607 break;
1608 default:
1609 printk(KERN_ERR "%s ep %p state %d\n",
1610 __func__, ep, ep->com.state);
1611 break;
1612 }
1613 mutex_unlock(&ep->com.mutex);
1614
1615 if (release)
1616 release_ep_resources(ep);
1617 return 0;
1618 }
1619
1620 static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1621 {
1622 struct sk_buff *skb;
1623 struct fw_ofld_connection_wr *req;
1624 unsigned int mtu_idx;
1625 int wscale;
1626 struct sockaddr_in *sin;
1627
1628 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1629 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1630 memset(req, 0, sizeof(*req));
1631 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR));
1632 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
1633 req->le.filter = cpu_to_be32(select_ntuple(ep->com.dev, ep->dst,
1634 ep->l2t));
1635 sin = (struct sockaddr_in *)&ep->com.local_addr;
1636 req->le.lport = sin->sin_port;
1637 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1638 sin = (struct sockaddr_in *)&ep->com.remote_addr;
1639 req->le.pport = sin->sin_port;
1640 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1641 req->tcb.t_state_to_astid =
1642 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_SENT) |
1643 V_FW_OFLD_CONNECTION_WR_ASTID(atid));
1644 req->tcb.cplrxdataack_cplpassacceptrpl =
1645 htons(F_FW_OFLD_CONNECTION_WR_CPLRXDATAACK);
1646 req->tcb.tx_max = (__force __be32) jiffies;
1647 req->tcb.rcv_adv = htons(1);
1648 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1649 wscale = compute_wscale(rcv_win);
1650 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS(1) |
1651 (nocong ? NO_CONG(1) : 0) |
1652 KEEP_ALIVE(1) |
1653 DELACK(1) |
1654 WND_SCALE(wscale) |
1655 MSS_IDX(mtu_idx) |
1656 L2T_IDX(ep->l2t->idx) |
1657 TX_CHAN(ep->tx_chan) |
1658 SMAC_SEL(ep->smac_idx) |
1659 DSCP(ep->tos) |
1660 ULP_MODE(ULP_MODE_TCPDDP) |
1661 RCV_BUFSIZ(rcv_win >> 10));
1662 req->tcb.opt2 = (__force __be32) (PACE(1) |
1663 TX_QUEUE(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
1664 RX_CHANNEL(0) |
1665 CCTRL_ECN(enable_ecn) |
1666 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid));
1667 if (enable_tcp_timestamps)
1668 req->tcb.opt2 |= (__force __be32) TSTAMPS_EN(1);
1669 if (enable_tcp_sack)
1670 req->tcb.opt2 |= (__force __be32) SACK_EN(1);
1671 if (wscale && enable_tcp_window_scaling)
1672 req->tcb.opt2 |= (__force __be32) WND_SCALE_EN(1);
1673 req->tcb.opt0 = cpu_to_be64((__force u64) req->tcb.opt0);
1674 req->tcb.opt2 = cpu_to_be32((__force u32) req->tcb.opt2);
1675 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
1676 set_bit(ACT_OFLD_CONN, &ep->com.history);
1677 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1678 }
1679
1680 /*
1681 * Return whether a failed active open has allocated a TID
1682 */
1683 static inline int act_open_has_tid(int status)
1684 {
1685 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1686 status != CPL_ERR_ARP_MISS;
1687 }
1688
1689 #define ACT_OPEN_RETRY_COUNT 2
1690
1691 static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
1692 struct dst_entry *dst, struct c4iw_dev *cdev,
1693 bool clear_mpa_v1)
1694 {
1695 struct neighbour *n;
1696 int err, step;
1697 struct net_device *pdev;
1698
1699 n = dst_neigh_lookup(dst, peer_ip);
1700 if (!n)
1701 return -ENODEV;
1702
1703 rcu_read_lock();
1704 err = -ENOMEM;
1705 if (n->dev->flags & IFF_LOOPBACK) {
1706 if (iptype == 4)
1707 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
1708 else if (IS_ENABLED(CONFIG_IPV6))
1709 for_each_netdev(&init_net, pdev) {
1710 if (ipv6_chk_addr(&init_net,
1711 (struct in6_addr *)peer_ip,
1712 pdev, 1))
1713 break;
1714 }
1715 else
1716 pdev = NULL;
1717
1718 if (!pdev) {
1719 err = -ENODEV;
1720 goto out;
1721 }
1722 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1723 n, pdev, 0);
1724 if (!ep->l2t)
1725 goto out;
1726 ep->mtu = pdev->mtu;
1727 ep->tx_chan = cxgb4_port_chan(pdev);
1728 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1729 step = cdev->rdev.lldi.ntxq /
1730 cdev->rdev.lldi.nchan;
1731 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1732 step = cdev->rdev.lldi.nrxq /
1733 cdev->rdev.lldi.nchan;
1734 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1735 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1736 cxgb4_port_idx(pdev) * step];
1737 dev_put(pdev);
1738 } else {
1739 pdev = get_real_dev(n->dev);
1740 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1741 n, pdev, 0);
1742 if (!ep->l2t)
1743 goto out;
1744 ep->mtu = dst_mtu(dst);
1745 ep->tx_chan = cxgb4_port_chan(n->dev);
1746 ep->smac_idx = (cxgb4_port_viid(n->dev) & 0x7F) << 1;
1747 step = cdev->rdev.lldi.ntxq /
1748 cdev->rdev.lldi.nchan;
1749 ep->txq_idx = cxgb4_port_idx(n->dev) * step;
1750 ep->ctrlq_idx = cxgb4_port_idx(n->dev);
1751 step = cdev->rdev.lldi.nrxq /
1752 cdev->rdev.lldi.nchan;
1753 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1754 cxgb4_port_idx(n->dev) * step];
1755
1756 if (clear_mpa_v1) {
1757 ep->retry_with_mpa_v1 = 0;
1758 ep->tried_with_mpa_v1 = 0;
1759 }
1760 }
1761 err = 0;
1762 out:
1763 rcu_read_unlock();
1764
1765 neigh_release(n);
1766
1767 return err;
1768 }
1769
1770 static int c4iw_reconnect(struct c4iw_ep *ep)
1771 {
1772 int err = 0;
1773 struct sockaddr_in *laddr = (struct sockaddr_in *)
1774 &ep->com.cm_id->local_addr;
1775 struct sockaddr_in *raddr = (struct sockaddr_in *)
1776 &ep->com.cm_id->remote_addr;
1777 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
1778 &ep->com.cm_id->local_addr;
1779 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
1780 &ep->com.cm_id->remote_addr;
1781 int iptype;
1782 __u8 *ra;
1783
1784 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
1785 init_timer(&ep->timer);
1786
1787 /*
1788 * Allocate an active TID to initiate a TCP connection.
1789 */
1790 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
1791 if (ep->atid == -1) {
1792 pr_err("%s - cannot alloc atid.\n", __func__);
1793 err = -ENOMEM;
1794 goto fail2;
1795 }
1796 insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
1797
1798 /* find a route */
1799 if (ep->com.cm_id->local_addr.ss_family == AF_INET) {
1800 ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
1801 raddr->sin_addr.s_addr, laddr->sin_port,
1802 raddr->sin_port, 0);
1803 iptype = 4;
1804 ra = (__u8 *)&raddr->sin_addr;
1805 } else {
1806 ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
1807 raddr6->sin6_addr.s6_addr,
1808 laddr6->sin6_port, raddr6->sin6_port, 0,
1809 raddr6->sin6_scope_id);
1810 iptype = 6;
1811 ra = (__u8 *)&raddr6->sin6_addr;
1812 }
1813 if (!ep->dst) {
1814 pr_err("%s - cannot find route.\n", __func__);
1815 err = -EHOSTUNREACH;
1816 goto fail3;
1817 }
1818 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false);
1819 if (err) {
1820 pr_err("%s - cannot alloc l2e.\n", __func__);
1821 goto fail4;
1822 }
1823
1824 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1825 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1826 ep->l2t->idx);
1827
1828 state_set(&ep->com, CONNECTING);
1829 ep->tos = 0;
1830
1831 /* send connect request to rnic */
1832 err = send_connect(ep);
1833 if (!err)
1834 goto out;
1835
1836 cxgb4_l2t_release(ep->l2t);
1837 fail4:
1838 dst_release(ep->dst);
1839 fail3:
1840 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
1841 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
1842 fail2:
1843 /*
1844 * remember to send notification to upper layer.
1845 * We are in here so the upper layer is not aware that this is
1846 * re-connect attempt and so, upper layer is still waiting for
1847 * response of 1st connect request.
1848 */
1849 connect_reply_upcall(ep, -ECONNRESET);
1850 c4iw_put_ep(&ep->com);
1851 out:
1852 return err;
1853 }
1854
1855 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1856 {
1857 struct c4iw_ep *ep;
1858 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1859 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1860 ntohl(rpl->atid_status)));
1861 struct tid_info *t = dev->rdev.lldi.tids;
1862 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1863 struct sockaddr_in *la;
1864 struct sockaddr_in *ra;
1865 struct sockaddr_in6 *la6;
1866 struct sockaddr_in6 *ra6;
1867
1868 ep = lookup_atid(t, atid);
1869 la = (struct sockaddr_in *)&ep->com.local_addr;
1870 ra = (struct sockaddr_in *)&ep->com.remote_addr;
1871 la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
1872 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
1873
1874 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1875 status, status2errno(status));
1876
1877 if (status == CPL_ERR_RTX_NEG_ADVICE) {
1878 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1879 atid);
1880 return 0;
1881 }
1882
1883 set_bit(ACT_OPEN_RPL, &ep->com.history);
1884
1885 /*
1886 * Log interesting failures.
1887 */
1888 switch (status) {
1889 case CPL_ERR_CONN_RESET:
1890 case CPL_ERR_CONN_TIMEDOUT:
1891 break;
1892 case CPL_ERR_TCAM_FULL:
1893 mutex_lock(&dev->rdev.stats.lock);
1894 dev->rdev.stats.tcam_full++;
1895 mutex_unlock(&dev->rdev.stats.lock);
1896 if (ep->com.local_addr.ss_family == AF_INET &&
1897 dev->rdev.lldi.enable_fw_ofld_conn) {
1898 send_fw_act_open_req(ep,
1899 GET_TID_TID(GET_AOPEN_ATID(
1900 ntohl(rpl->atid_status))));
1901 return 0;
1902 }
1903 break;
1904 case CPL_ERR_CONN_EXIST:
1905 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
1906 set_bit(ACT_RETRY_INUSE, &ep->com.history);
1907 remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
1908 atid);
1909 cxgb4_free_atid(t, atid);
1910 dst_release(ep->dst);
1911 cxgb4_l2t_release(ep->l2t);
1912 c4iw_reconnect(ep);
1913 return 0;
1914 }
1915 break;
1916 default:
1917 if (ep->com.local_addr.ss_family == AF_INET) {
1918 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
1919 atid, status, status2errno(status),
1920 &la->sin_addr.s_addr, ntohs(la->sin_port),
1921 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
1922 } else {
1923 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
1924 atid, status, status2errno(status),
1925 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
1926 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
1927 }
1928 break;
1929 }
1930
1931 connect_reply_upcall(ep, status2errno(status));
1932 state_set(&ep->com, DEAD);
1933
1934 if (status && act_open_has_tid(status))
1935 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1936
1937 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
1938 cxgb4_free_atid(t, atid);
1939 dst_release(ep->dst);
1940 cxgb4_l2t_release(ep->l2t);
1941 c4iw_put_ep(&ep->com);
1942
1943 return 0;
1944 }
1945
1946 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1947 {
1948 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1949 struct tid_info *t = dev->rdev.lldi.tids;
1950 unsigned int stid = GET_TID(rpl);
1951 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1952
1953 if (!ep) {
1954 PDBG("%s stid %d lookup failure!\n", __func__, stid);
1955 goto out;
1956 }
1957 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1958 rpl->status, status2errno(rpl->status));
1959 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1960
1961 out:
1962 return 0;
1963 }
1964
1965 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1966 {
1967 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1968 struct tid_info *t = dev->rdev.lldi.tids;
1969 unsigned int stid = GET_TID(rpl);
1970 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1971
1972 PDBG("%s ep %p\n", __func__, ep);
1973 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1974 return 0;
1975 }
1976
1977 static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
1978 struct cpl_pass_accept_req *req)
1979 {
1980 struct cpl_pass_accept_rpl *rpl;
1981 unsigned int mtu_idx;
1982 u64 opt0;
1983 u32 opt2;
1984 int wscale;
1985
1986 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1987 BUG_ON(skb_cloned(skb));
1988 skb_trim(skb, sizeof(*rpl));
1989 skb_get(skb);
1990 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1991 wscale = compute_wscale(rcv_win);
1992 opt0 = (nocong ? NO_CONG(1) : 0) |
1993 KEEP_ALIVE(1) |
1994 DELACK(1) |
1995 WND_SCALE(wscale) |
1996 MSS_IDX(mtu_idx) |
1997 L2T_IDX(ep->l2t->idx) |
1998 TX_CHAN(ep->tx_chan) |
1999 SMAC_SEL(ep->smac_idx) |
2000 DSCP(ep->tos >> 2) |
2001 ULP_MODE(ULP_MODE_TCPDDP) |
2002 RCV_BUFSIZ(rcv_win>>10);
2003 opt2 = RX_CHANNEL(0) |
2004 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
2005
2006 if (enable_tcp_timestamps && req->tcpopt.tstamp)
2007 opt2 |= TSTAMPS_EN(1);
2008 if (enable_tcp_sack && req->tcpopt.sack)
2009 opt2 |= SACK_EN(1);
2010 if (wscale && enable_tcp_window_scaling)
2011 opt2 |= WND_SCALE_EN(1);
2012 if (enable_ecn) {
2013 const struct tcphdr *tcph;
2014 u32 hlen = ntohl(req->hdr_len);
2015
2016 tcph = (const void *)(req + 1) + G_ETH_HDR_LEN(hlen) +
2017 G_IP_HDR_LEN(hlen);
2018 if (tcph->ece && tcph->cwr)
2019 opt2 |= CCTRL_ECN(1);
2020 }
2021
2022 rpl = cplhdr(skb);
2023 INIT_TP_WR(rpl, ep->hwtid);
2024 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
2025 ep->hwtid));
2026 rpl->opt0 = cpu_to_be64(opt0);
2027 rpl->opt2 = cpu_to_be32(opt2);
2028 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2029 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
2030 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2031
2032 return;
2033 }
2034
2035 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2036 {
2037 PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
2038 BUG_ON(skb_cloned(skb));
2039 skb_trim(skb, sizeof(struct cpl_tid_release));
2040 skb_get(skb);
2041 release_tid(&dev->rdev, hwtid, skb);
2042 return;
2043 }
2044
2045 static void get_4tuple(struct cpl_pass_accept_req *req, int *iptype,
2046 __u8 *local_ip, __u8 *peer_ip,
2047 __be16 *local_port, __be16 *peer_port)
2048 {
2049 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
2050 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
2051 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
2052 struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
2053 struct tcphdr *tcp = (struct tcphdr *)
2054 ((u8 *)(req + 1) + eth_len + ip_len);
2055
2056 if (ip->version == 4) {
2057 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
2058 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
2059 ntohs(tcp->dest));
2060 *iptype = 4;
2061 memcpy(peer_ip, &ip->saddr, 4);
2062 memcpy(local_ip, &ip->daddr, 4);
2063 } else {
2064 PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
2065 ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
2066 ntohs(tcp->dest));
2067 *iptype = 6;
2068 memcpy(peer_ip, ip6->saddr.s6_addr, 16);
2069 memcpy(local_ip, ip6->daddr.s6_addr, 16);
2070 }
2071 *peer_port = tcp->source;
2072 *local_port = tcp->dest;
2073
2074 return;
2075 }
2076
2077 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2078 {
2079 struct c4iw_ep *child_ep = NULL, *parent_ep;
2080 struct cpl_pass_accept_req *req = cplhdr(skb);
2081 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
2082 struct tid_info *t = dev->rdev.lldi.tids;
2083 unsigned int hwtid = GET_TID(req);
2084 struct dst_entry *dst;
2085 __u8 local_ip[16], peer_ip[16];
2086 __be16 local_port, peer_port;
2087 int err;
2088 u16 peer_mss = ntohs(req->tcpopt.mss);
2089 int iptype;
2090
2091 parent_ep = lookup_stid(t, stid);
2092 if (!parent_ep) {
2093 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
2094 goto reject;
2095 }
2096
2097 if (state_read(&parent_ep->com) != LISTEN) {
2098 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
2099 __func__);
2100 goto reject;
2101 }
2102
2103 get_4tuple(req, &iptype, local_ip, peer_ip, &local_port, &peer_port);
2104
2105 /* Find output route */
2106 if (iptype == 4) {
2107 PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2108 , __func__, parent_ep, hwtid,
2109 local_ip, peer_ip, ntohs(local_port),
2110 ntohs(peer_port), peer_mss);
2111 dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
2112 local_port, peer_port,
2113 GET_POPEN_TOS(ntohl(req->tos_stid)));
2114 } else {
2115 PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2116 , __func__, parent_ep, hwtid,
2117 local_ip, peer_ip, ntohs(local_port),
2118 ntohs(peer_port), peer_mss);
2119 dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
2120 PASS_OPEN_TOS(ntohl(req->tos_stid)),
2121 ((struct sockaddr_in6 *)
2122 &parent_ep->com.local_addr)->sin6_scope_id);
2123 }
2124 if (!dst) {
2125 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
2126 __func__);
2127 goto reject;
2128 }
2129
2130 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2131 if (!child_ep) {
2132 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
2133 __func__);
2134 dst_release(dst);
2135 goto reject;
2136 }
2137
2138 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false);
2139 if (err) {
2140 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
2141 __func__);
2142 dst_release(dst);
2143 kfree(child_ep);
2144 goto reject;
2145 }
2146
2147 if (peer_mss && child_ep->mtu > (peer_mss + 40))
2148 child_ep->mtu = peer_mss + 40;
2149
2150 state_set(&child_ep->com, CONNECTING);
2151 child_ep->com.dev = dev;
2152 child_ep->com.cm_id = NULL;
2153 if (iptype == 4) {
2154 struct sockaddr_in *sin = (struct sockaddr_in *)
2155 &child_ep->com.local_addr;
2156 sin->sin_family = PF_INET;
2157 sin->sin_port = local_port;
2158 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2159 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
2160 sin->sin_family = PF_INET;
2161 sin->sin_port = peer_port;
2162 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2163 } else {
2164 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
2165 &child_ep->com.local_addr;
2166 sin6->sin6_family = PF_INET6;
2167 sin6->sin6_port = local_port;
2168 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2169 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
2170 sin6->sin6_family = PF_INET6;
2171 sin6->sin6_port = peer_port;
2172 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2173 }
2174 c4iw_get_ep(&parent_ep->com);
2175 child_ep->parent_ep = parent_ep;
2176 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
2177 child_ep->dst = dst;
2178 child_ep->hwtid = hwtid;
2179
2180 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
2181 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2182
2183 init_timer(&child_ep->timer);
2184 cxgb4_insert_tid(t, child_ep, hwtid);
2185 insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
2186 accept_cr(child_ep, skb, req);
2187 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2188 goto out;
2189 reject:
2190 reject_cr(dev, hwtid, skb);
2191 out:
2192 return 0;
2193 }
2194
2195 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2196 {
2197 struct c4iw_ep *ep;
2198 struct cpl_pass_establish *req = cplhdr(skb);
2199 struct tid_info *t = dev->rdev.lldi.tids;
2200 unsigned int tid = GET_TID(req);
2201
2202 ep = lookup_tid(t, tid);
2203 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2204 ep->snd_seq = be32_to_cpu(req->snd_isn);
2205 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2206
2207 PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
2208 ntohs(req->tcp_opt));
2209
2210 set_emss(ep, ntohs(req->tcp_opt));
2211
2212 dst_confirm(ep->dst);
2213 state_set(&ep->com, MPA_REQ_WAIT);
2214 start_ep_timer(ep);
2215 send_flowc(ep, skb);
2216 set_bit(PASS_ESTAB, &ep->com.history);
2217
2218 return 0;
2219 }
2220
2221 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2222 {
2223 struct cpl_peer_close *hdr = cplhdr(skb);
2224 struct c4iw_ep *ep;
2225 struct c4iw_qp_attributes attrs;
2226 int disconnect = 1;
2227 int release = 0;
2228 struct tid_info *t = dev->rdev.lldi.tids;
2229 unsigned int tid = GET_TID(hdr);
2230 int ret;
2231
2232 ep = lookup_tid(t, tid);
2233 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2234 dst_confirm(ep->dst);
2235
2236 set_bit(PEER_CLOSE, &ep->com.history);
2237 mutex_lock(&ep->com.mutex);
2238 switch (ep->com.state) {
2239 case MPA_REQ_WAIT:
2240 __state_set(&ep->com, CLOSING);
2241 break;
2242 case MPA_REQ_SENT:
2243 __state_set(&ep->com, CLOSING);
2244 connect_reply_upcall(ep, -ECONNRESET);
2245 break;
2246 case MPA_REQ_RCVD:
2247
2248 /*
2249 * We're gonna mark this puppy DEAD, but keep
2250 * the reference on it until the ULP accepts or
2251 * rejects the CR. Also wake up anyone waiting
2252 * in rdma connection migration (see c4iw_accept_cr()).
2253 */
2254 __state_set(&ep->com, CLOSING);
2255 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2256 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2257 break;
2258 case MPA_REP_SENT:
2259 __state_set(&ep->com, CLOSING);
2260 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2261 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2262 break;
2263 case FPDU_MODE:
2264 start_ep_timer(ep);
2265 __state_set(&ep->com, CLOSING);
2266 attrs.next_state = C4IW_QP_STATE_CLOSING;
2267 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2268 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2269 if (ret != -ECONNRESET) {
2270 peer_close_upcall(ep);
2271 disconnect = 1;
2272 }
2273 break;
2274 case ABORTING:
2275 disconnect = 0;
2276 break;
2277 case CLOSING:
2278 __state_set(&ep->com, MORIBUND);
2279 disconnect = 0;
2280 break;
2281 case MORIBUND:
2282 stop_ep_timer(ep);
2283 if (ep->com.cm_id && ep->com.qp) {
2284 attrs.next_state = C4IW_QP_STATE_IDLE;
2285 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2286 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2287 }
2288 close_complete_upcall(ep);
2289 __state_set(&ep->com, DEAD);
2290 release = 1;
2291 disconnect = 0;
2292 break;
2293 case DEAD:
2294 disconnect = 0;
2295 break;
2296 default:
2297 BUG_ON(1);
2298 }
2299 mutex_unlock(&ep->com.mutex);
2300 if (disconnect)
2301 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2302 if (release)
2303 release_ep_resources(ep);
2304 return 0;
2305 }
2306
2307 /*
2308 * Returns whether an ABORT_REQ_RSS message is a negative advice.
2309 */
2310 static int is_neg_adv_abort(unsigned int status)
2311 {
2312 return status == CPL_ERR_RTX_NEG_ADVICE ||
2313 status == CPL_ERR_PERSIST_NEG_ADVICE;
2314 }
2315
2316 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2317 {
2318 struct cpl_abort_req_rss *req = cplhdr(skb);
2319 struct c4iw_ep *ep;
2320 struct cpl_abort_rpl *rpl;
2321 struct sk_buff *rpl_skb;
2322 struct c4iw_qp_attributes attrs;
2323 int ret;
2324 int release = 0;
2325 struct tid_info *t = dev->rdev.lldi.tids;
2326 unsigned int tid = GET_TID(req);
2327
2328 ep = lookup_tid(t, tid);
2329 if (is_neg_adv_abort(req->status)) {
2330 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
2331 ep->hwtid);
2332 return 0;
2333 }
2334 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2335 ep->com.state);
2336 set_bit(PEER_ABORT, &ep->com.history);
2337
2338 /*
2339 * Wake up any threads in rdma_init() or rdma_fini().
2340 * However, this is not needed if com state is just
2341 * MPA_REQ_SENT
2342 */
2343 if (ep->com.state != MPA_REQ_SENT)
2344 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2345
2346 mutex_lock(&ep->com.mutex);
2347 switch (ep->com.state) {
2348 case CONNECTING:
2349 break;
2350 case MPA_REQ_WAIT:
2351 stop_ep_timer(ep);
2352 break;
2353 case MPA_REQ_SENT:
2354 stop_ep_timer(ep);
2355 if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
2356 connect_reply_upcall(ep, -ECONNRESET);
2357 else {
2358 /*
2359 * we just don't send notification upwards because we
2360 * want to retry with mpa_v1 without upper layers even
2361 * knowing it.
2362 *
2363 * do some housekeeping so as to re-initiate the
2364 * connection
2365 */
2366 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
2367 mpa_rev);
2368 ep->retry_with_mpa_v1 = 1;
2369 }
2370 break;
2371 case MPA_REP_SENT:
2372 break;
2373 case MPA_REQ_RCVD:
2374 break;
2375 case MORIBUND:
2376 case CLOSING:
2377 stop_ep_timer(ep);
2378 /*FALLTHROUGH*/
2379 case FPDU_MODE:
2380 if (ep->com.cm_id && ep->com.qp) {
2381 attrs.next_state = C4IW_QP_STATE_ERROR;
2382 ret = c4iw_modify_qp(ep->com.qp->rhp,
2383 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2384 &attrs, 1);
2385 if (ret)
2386 printk(KERN_ERR MOD
2387 "%s - qp <- error failed!\n",
2388 __func__);
2389 }
2390 peer_abort_upcall(ep);
2391 break;
2392 case ABORTING:
2393 break;
2394 case DEAD:
2395 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2396 mutex_unlock(&ep->com.mutex);
2397 return 0;
2398 default:
2399 BUG_ON(1);
2400 break;
2401 }
2402 dst_confirm(ep->dst);
2403 if (ep->com.state != ABORTING) {
2404 __state_set(&ep->com, DEAD);
2405 /* we don't release if we want to retry with mpa_v1 */
2406 if (!ep->retry_with_mpa_v1)
2407 release = 1;
2408 }
2409 mutex_unlock(&ep->com.mutex);
2410
2411 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2412 if (!rpl_skb) {
2413 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
2414 __func__);
2415 release = 1;
2416 goto out;
2417 }
2418 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2419 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2420 INIT_TP_WR(rpl, ep->hwtid);
2421 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2422 rpl->cmd = CPL_ABORT_NO_RST;
2423 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2424 out:
2425 if (release)
2426 release_ep_resources(ep);
2427 else if (ep->retry_with_mpa_v1) {
2428 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
2429 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2430 dst_release(ep->dst);
2431 cxgb4_l2t_release(ep->l2t);
2432 c4iw_reconnect(ep);
2433 }
2434
2435 return 0;
2436 }
2437
2438 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2439 {
2440 struct c4iw_ep *ep;
2441 struct c4iw_qp_attributes attrs;
2442 struct cpl_close_con_rpl *rpl = cplhdr(skb);
2443 int release = 0;
2444 struct tid_info *t = dev->rdev.lldi.tids;
2445 unsigned int tid = GET_TID(rpl);
2446
2447 ep = lookup_tid(t, tid);
2448
2449 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2450 BUG_ON(!ep);
2451
2452 /* The cm_id may be null if we failed to connect */
2453 mutex_lock(&ep->com.mutex);
2454 switch (ep->com.state) {
2455 case CLOSING:
2456 __state_set(&ep->com, MORIBUND);
2457 break;
2458 case MORIBUND:
2459 stop_ep_timer(ep);
2460 if ((ep->com.cm_id) && (ep->com.qp)) {
2461 attrs.next_state = C4IW_QP_STATE_IDLE;
2462 c4iw_modify_qp(ep->com.qp->rhp,
2463 ep->com.qp,
2464 C4IW_QP_ATTR_NEXT_STATE,
2465 &attrs, 1);
2466 }
2467 close_complete_upcall(ep);
2468 __state_set(&ep->com, DEAD);
2469 release = 1;
2470 break;
2471 case ABORTING:
2472 case DEAD:
2473 break;
2474 default:
2475 BUG_ON(1);
2476 break;
2477 }
2478 mutex_unlock(&ep->com.mutex);
2479 if (release)
2480 release_ep_resources(ep);
2481 return 0;
2482 }
2483
2484 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2485 {
2486 struct cpl_rdma_terminate *rpl = cplhdr(skb);
2487 struct tid_info *t = dev->rdev.lldi.tids;
2488 unsigned int tid = GET_TID(rpl);
2489 struct c4iw_ep *ep;
2490 struct c4iw_qp_attributes attrs;
2491
2492 ep = lookup_tid(t, tid);
2493 BUG_ON(!ep);
2494
2495 if (ep && ep->com.qp) {
2496 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2497 ep->com.qp->wq.sq.qid);
2498 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2499 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2500 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2501 } else
2502 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2503
2504 return 0;
2505 }
2506
2507 /*
2508 * Upcall from the adapter indicating data has been transmitted.
2509 * For us its just the single MPA request or reply. We can now free
2510 * the skb holding the mpa message.
2511 */
2512 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2513 {
2514 struct c4iw_ep *ep;
2515 struct cpl_fw4_ack *hdr = cplhdr(skb);
2516 u8 credits = hdr->credits;
2517 unsigned int tid = GET_TID(hdr);
2518 struct tid_info *t = dev->rdev.lldi.tids;
2519
2520
2521 ep = lookup_tid(t, tid);
2522 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
2523 if (credits == 0) {
2524 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
2525 __func__, ep, ep->hwtid, state_read(&ep->com));
2526 return 0;
2527 }
2528
2529 dst_confirm(ep->dst);
2530 if (ep->mpa_skb) {
2531 PDBG("%s last streaming msg ack ep %p tid %u state %u "
2532 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
2533 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
2534 kfree_skb(ep->mpa_skb);
2535 ep->mpa_skb = NULL;
2536 }
2537 return 0;
2538 }
2539
2540 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2541 {
2542 int err;
2543 struct c4iw_ep *ep = to_ep(cm_id);
2544 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2545
2546 if (state_read(&ep->com) == DEAD) {
2547 c4iw_put_ep(&ep->com);
2548 return -ECONNRESET;
2549 }
2550 set_bit(ULP_REJECT, &ep->com.history);
2551 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
2552 if (mpa_rev == 0)
2553 abort_connection(ep, NULL, GFP_KERNEL);
2554 else {
2555 err = send_mpa_reject(ep, pdata, pdata_len);
2556 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2557 }
2558 c4iw_put_ep(&ep->com);
2559 return 0;
2560 }
2561
2562 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2563 {
2564 int err;
2565 struct c4iw_qp_attributes attrs;
2566 enum c4iw_qp_attr_mask mask;
2567 struct c4iw_ep *ep = to_ep(cm_id);
2568 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2569 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2570
2571 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2572 if (state_read(&ep->com) == DEAD) {
2573 err = -ECONNRESET;
2574 goto err;
2575 }
2576
2577 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
2578 BUG_ON(!qp);
2579
2580 set_bit(ULP_ACCEPT, &ep->com.history);
2581 if ((conn_param->ord > c4iw_max_read_depth) ||
2582 (conn_param->ird > c4iw_max_read_depth)) {
2583 abort_connection(ep, NULL, GFP_KERNEL);
2584 err = -EINVAL;
2585 goto err;
2586 }
2587
2588 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2589 if (conn_param->ord > ep->ird) {
2590 ep->ird = conn_param->ird;
2591 ep->ord = conn_param->ord;
2592 send_mpa_reject(ep, conn_param->private_data,
2593 conn_param->private_data_len);
2594 abort_connection(ep, NULL, GFP_KERNEL);
2595 err = -ENOMEM;
2596 goto err;
2597 }
2598 if (conn_param->ird > ep->ord) {
2599 if (!ep->ord)
2600 conn_param->ird = 1;
2601 else {
2602 abort_connection(ep, NULL, GFP_KERNEL);
2603 err = -ENOMEM;
2604 goto err;
2605 }
2606 }
2607
2608 }
2609 ep->ird = conn_param->ird;
2610 ep->ord = conn_param->ord;
2611
2612 if (ep->mpa_attr.version != 2)
2613 if (peer2peer && ep->ird == 0)
2614 ep->ird = 1;
2615
2616 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
2617
2618 cm_id->add_ref(cm_id);
2619 ep->com.cm_id = cm_id;
2620 ep->com.qp = qp;
2621 ref_qp(ep);
2622
2623 /* bind QP to EP and move to RTS */
2624 attrs.mpa_attr = ep->mpa_attr;
2625 attrs.max_ird = ep->ird;
2626 attrs.max_ord = ep->ord;
2627 attrs.llp_stream_handle = ep;
2628 attrs.next_state = C4IW_QP_STATE_RTS;
2629
2630 /* bind QP and TID with INIT_WR */
2631 mask = C4IW_QP_ATTR_NEXT_STATE |
2632 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2633 C4IW_QP_ATTR_MPA_ATTR |
2634 C4IW_QP_ATTR_MAX_IRD |
2635 C4IW_QP_ATTR_MAX_ORD;
2636
2637 err = c4iw_modify_qp(ep->com.qp->rhp,
2638 ep->com.qp, mask, &attrs, 1);
2639 if (err)
2640 goto err1;
2641 err = send_mpa_reply(ep, conn_param->private_data,
2642 conn_param->private_data_len);
2643 if (err)
2644 goto err1;
2645
2646 state_set(&ep->com, FPDU_MODE);
2647 established_upcall(ep);
2648 c4iw_put_ep(&ep->com);
2649 return 0;
2650 err1:
2651 ep->com.cm_id = NULL;
2652 cm_id->rem_ref(cm_id);
2653 err:
2654 c4iw_put_ep(&ep->com);
2655 return err;
2656 }
2657
2658 static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2659 {
2660 struct in_device *ind;
2661 int found = 0;
2662 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
2663 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
2664
2665 ind = in_dev_get(dev->rdev.lldi.ports[0]);
2666 if (!ind)
2667 return -EADDRNOTAVAIL;
2668 for_primary_ifa(ind) {
2669 laddr->sin_addr.s_addr = ifa->ifa_address;
2670 raddr->sin_addr.s_addr = ifa->ifa_address;
2671 found = 1;
2672 break;
2673 }
2674 endfor_ifa(ind);
2675 in_dev_put(ind);
2676 return found ? 0 : -EADDRNOTAVAIL;
2677 }
2678
2679 static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
2680 unsigned char banned_flags)
2681 {
2682 struct inet6_dev *idev;
2683 int err = -EADDRNOTAVAIL;
2684
2685 rcu_read_lock();
2686 idev = __in6_dev_get(dev);
2687 if (idev != NULL) {
2688 struct inet6_ifaddr *ifp;
2689
2690 read_lock_bh(&idev->lock);
2691 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2692 if (ifp->scope == IFA_LINK &&
2693 !(ifp->flags & banned_flags)) {
2694 memcpy(addr, &ifp->addr, 16);
2695 err = 0;
2696 break;
2697 }
2698 }
2699 read_unlock_bh(&idev->lock);
2700 }
2701 rcu_read_unlock();
2702 return err;
2703 }
2704
2705 static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2706 {
2707 struct in6_addr uninitialized_var(addr);
2708 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->local_addr;
2709 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->remote_addr;
2710
2711 if (get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
2712 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
2713 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
2714 return 0;
2715 }
2716 return -EADDRNOTAVAIL;
2717 }
2718
2719 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2720 {
2721 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2722 struct c4iw_ep *ep;
2723 int err = 0;
2724 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
2725 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
2726 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr;
2727 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
2728 &cm_id->remote_addr;
2729 __u8 *ra;
2730 int iptype;
2731
2732 if ((conn_param->ord > c4iw_max_read_depth) ||
2733 (conn_param->ird > c4iw_max_read_depth)) {
2734 err = -EINVAL;
2735 goto out;
2736 }
2737 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2738 if (!ep) {
2739 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2740 err = -ENOMEM;
2741 goto out;
2742 }
2743 init_timer(&ep->timer);
2744 ep->plen = conn_param->private_data_len;
2745 if (ep->plen)
2746 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
2747 conn_param->private_data, ep->plen);
2748 ep->ird = conn_param->ird;
2749 ep->ord = conn_param->ord;
2750
2751 if (peer2peer && ep->ord == 0)
2752 ep->ord = 1;
2753
2754 cm_id->add_ref(cm_id);
2755 ep->com.dev = dev;
2756 ep->com.cm_id = cm_id;
2757 ep->com.qp = get_qhp(dev, conn_param->qpn);
2758 if (!ep->com.qp) {
2759 PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
2760 err = -EINVAL;
2761 goto fail2;
2762 }
2763 ref_qp(ep);
2764 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
2765 ep->com.qp, cm_id);
2766
2767 /*
2768 * Allocate an active TID to initiate a TCP connection.
2769 */
2770 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
2771 if (ep->atid == -1) {
2772 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
2773 err = -ENOMEM;
2774 goto fail2;
2775 }
2776 insert_handle(dev, &dev->atid_idr, ep, ep->atid);
2777
2778 if (cm_id->remote_addr.ss_family == AF_INET) {
2779 iptype = 4;
2780 ra = (__u8 *)&raddr->sin_addr;
2781
2782 /*
2783 * Handle loopback requests to INADDR_ANY.
2784 */
2785 if ((__force int)raddr->sin_addr.s_addr == INADDR_ANY) {
2786 err = pick_local_ipaddrs(dev, cm_id);
2787 if (err)
2788 goto fail2;
2789 }
2790
2791 /* find a route */
2792 PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
2793 __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
2794 ra, ntohs(raddr->sin_port));
2795 ep->dst = find_route(dev, laddr->sin_addr.s_addr,
2796 raddr->sin_addr.s_addr, laddr->sin_port,
2797 raddr->sin_port, 0);
2798 } else {
2799 iptype = 6;
2800 ra = (__u8 *)&raddr6->sin6_addr;
2801
2802 /*
2803 * Handle loopback requests to INADDR_ANY.
2804 */
2805 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
2806 err = pick_local_ip6addrs(dev, cm_id);
2807 if (err)
2808 goto fail2;
2809 }
2810
2811 /* find a route */
2812 PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
2813 __func__, laddr6->sin6_addr.s6_addr,
2814 ntohs(laddr6->sin6_port),
2815 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
2816 ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
2817 raddr6->sin6_addr.s6_addr,
2818 laddr6->sin6_port, raddr6->sin6_port, 0,
2819 raddr6->sin6_scope_id);
2820 }
2821 if (!ep->dst) {
2822 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
2823 err = -EHOSTUNREACH;
2824 goto fail3;
2825 }
2826
2827 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true);
2828 if (err) {
2829 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
2830 goto fail4;
2831 }
2832
2833 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2834 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2835 ep->l2t->idx);
2836
2837 state_set(&ep->com, CONNECTING);
2838 ep->tos = 0;
2839 memcpy(&ep->com.local_addr, &cm_id->local_addr,
2840 sizeof(ep->com.local_addr));
2841 memcpy(&ep->com.remote_addr, &cm_id->remote_addr,
2842 sizeof(ep->com.remote_addr));
2843
2844 /* send connect request to rnic */
2845 err = send_connect(ep);
2846 if (!err)
2847 goto out;
2848
2849 cxgb4_l2t_release(ep->l2t);
2850 fail4:
2851 dst_release(ep->dst);
2852 fail3:
2853 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
2854 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2855 fail2:
2856 cm_id->rem_ref(cm_id);
2857 c4iw_put_ep(&ep->com);
2858 out:
2859 return err;
2860 }
2861
2862 static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
2863 {
2864 int err;
2865 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
2866
2867 c4iw_init_wr_wait(&ep->com.wr_wait);
2868 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
2869 ep->stid, &sin6->sin6_addr,
2870 sin6->sin6_port,
2871 ep->com.dev->rdev.lldi.rxq_ids[0]);
2872 if (!err)
2873 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
2874 &ep->com.wr_wait,
2875 0, 0, __func__);
2876 if (err)
2877 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
2878 err, ep->stid,
2879 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
2880 return err;
2881 }
2882
2883 static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
2884 {
2885 int err;
2886 struct sockaddr_in *sin = (struct sockaddr_in *)&ep->com.local_addr;
2887
2888 if (dev->rdev.lldi.enable_fw_ofld_conn) {
2889 do {
2890 err = cxgb4_create_server_filter(
2891 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2892 sin->sin_addr.s_addr, sin->sin_port, 0,
2893 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
2894 if (err == -EBUSY) {
2895 set_current_state(TASK_UNINTERRUPTIBLE);
2896 schedule_timeout(usecs_to_jiffies(100));
2897 }
2898 } while (err == -EBUSY);
2899 } else {
2900 c4iw_init_wr_wait(&ep->com.wr_wait);
2901 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
2902 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
2903 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
2904 if (!err)
2905 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
2906 &ep->com.wr_wait,
2907 0, 0, __func__);
2908 }
2909 if (err)
2910 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
2911 , err, ep->stid,
2912 &sin->sin_addr, ntohs(sin->sin_port));
2913 return err;
2914 }
2915
2916 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2917 {
2918 int err = 0;
2919 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2920 struct c4iw_listen_ep *ep;
2921
2922 might_sleep();
2923
2924 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2925 if (!ep) {
2926 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2927 err = -ENOMEM;
2928 goto fail1;
2929 }
2930 PDBG("%s ep %p\n", __func__, ep);
2931 cm_id->add_ref(cm_id);
2932 ep->com.cm_id = cm_id;
2933 ep->com.dev = dev;
2934 ep->backlog = backlog;
2935 memcpy(&ep->com.local_addr, &cm_id->local_addr,
2936 sizeof(ep->com.local_addr));
2937
2938 /*
2939 * Allocate a server TID.
2940 */
2941 if (dev->rdev.lldi.enable_fw_ofld_conn)
2942 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
2943 cm_id->local_addr.ss_family, ep);
2944 else
2945 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
2946 cm_id->local_addr.ss_family, ep);
2947
2948 if (ep->stid == -1) {
2949 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
2950 err = -ENOMEM;
2951 goto fail2;
2952 }
2953 insert_handle(dev, &dev->stid_idr, ep, ep->stid);
2954 state_set(&ep->com, LISTEN);
2955 if (ep->com.local_addr.ss_family == AF_INET)
2956 err = create_server4(dev, ep);
2957 else
2958 err = create_server6(dev, ep);
2959 if (!err) {
2960 cm_id->provider_data = ep;
2961 goto out;
2962 }
2963 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
2964 ep->com.local_addr.ss_family);
2965 fail2:
2966 cm_id->rem_ref(cm_id);
2967 c4iw_put_ep(&ep->com);
2968 fail1:
2969 out:
2970 return err;
2971 }
2972
2973 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2974 {
2975 int err;
2976 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2977
2978 PDBG("%s ep %p\n", __func__, ep);
2979
2980 might_sleep();
2981 state_set(&ep->com, DEAD);
2982 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
2983 ep->com.local_addr.ss_family == AF_INET) {
2984 err = cxgb4_remove_server_filter(
2985 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2986 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
2987 } else {
2988 c4iw_init_wr_wait(&ep->com.wr_wait);
2989 err = cxgb4_remove_server(
2990 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2991 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
2992 if (err)
2993 goto done;
2994 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
2995 0, 0, __func__);
2996 }
2997 remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
2998 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
2999 ep->com.local_addr.ss_family);
3000 done:
3001 cm_id->rem_ref(cm_id);
3002 c4iw_put_ep(&ep->com);
3003 return err;
3004 }
3005
3006 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3007 {
3008 int ret = 0;
3009 int close = 0;
3010 int fatal = 0;
3011 struct c4iw_rdev *rdev;
3012
3013 mutex_lock(&ep->com.mutex);
3014
3015 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
3016 states[ep->com.state], abrupt);
3017
3018 rdev = &ep->com.dev->rdev;
3019 if (c4iw_fatal_error(rdev)) {
3020 fatal = 1;
3021 close_complete_upcall(ep);
3022 ep->com.state = DEAD;
3023 }
3024 switch (ep->com.state) {
3025 case MPA_REQ_WAIT:
3026 case MPA_REQ_SENT:
3027 case MPA_REQ_RCVD:
3028 case MPA_REP_SENT:
3029 case FPDU_MODE:
3030 close = 1;
3031 if (abrupt)
3032 ep->com.state = ABORTING;
3033 else {
3034 ep->com.state = CLOSING;
3035 start_ep_timer(ep);
3036 }
3037 set_bit(CLOSE_SENT, &ep->com.flags);
3038 break;
3039 case CLOSING:
3040 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3041 close = 1;
3042 if (abrupt) {
3043 stop_ep_timer(ep);
3044 ep->com.state = ABORTING;
3045 } else
3046 ep->com.state = MORIBUND;
3047 }
3048 break;
3049 case MORIBUND:
3050 case ABORTING:
3051 case DEAD:
3052 PDBG("%s ignoring disconnect ep %p state %u\n",
3053 __func__, ep, ep->com.state);
3054 break;
3055 default:
3056 BUG();
3057 break;
3058 }
3059
3060 if (close) {
3061 if (abrupt) {
3062 set_bit(EP_DISC_ABORT, &ep->com.history);
3063 close_complete_upcall(ep);
3064 ret = send_abort(ep, NULL, gfp);
3065 } else {
3066 set_bit(EP_DISC_CLOSE, &ep->com.history);
3067 ret = send_halfclose(ep, gfp);
3068 }
3069 if (ret)
3070 fatal = 1;
3071 }
3072 mutex_unlock(&ep->com.mutex);
3073 if (fatal)
3074 release_ep_resources(ep);
3075 return ret;
3076 }
3077
3078 static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3079 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3080 {
3081 struct c4iw_ep *ep;
3082 int atid = be32_to_cpu(req->tid);
3083
3084 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3085 (__force u32) req->tid);
3086 if (!ep)
3087 return;
3088
3089 switch (req->retval) {
3090 case FW_ENOMEM:
3091 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3092 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3093 send_fw_act_open_req(ep, atid);
3094 return;
3095 }
3096 case FW_EADDRINUSE:
3097 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3098 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3099 send_fw_act_open_req(ep, atid);
3100 return;
3101 }
3102 break;
3103 default:
3104 pr_info("%s unexpected ofld conn wr retval %d\n",
3105 __func__, req->retval);
3106 break;
3107 }
3108 pr_err("active ofld_connect_wr failure %d atid %d\n",
3109 req->retval, atid);
3110 mutex_lock(&dev->rdev.stats.lock);
3111 dev->rdev.stats.act_ofld_conn_fails++;
3112 mutex_unlock(&dev->rdev.stats.lock);
3113 connect_reply_upcall(ep, status2errno(req->retval));
3114 state_set(&ep->com, DEAD);
3115 remove_handle(dev, &dev->atid_idr, atid);
3116 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3117 dst_release(ep->dst);
3118 cxgb4_l2t_release(ep->l2t);
3119 c4iw_put_ep(&ep->com);
3120 }
3121
3122 static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3123 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3124 {
3125 struct sk_buff *rpl_skb;
3126 struct cpl_pass_accept_req *cpl;
3127 int ret;
3128
3129 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3130 BUG_ON(!rpl_skb);
3131 if (req->retval) {
3132 PDBG("%s passive open failure %d\n", __func__, req->retval);
3133 mutex_lock(&dev->rdev.stats.lock);
3134 dev->rdev.stats.pas_ofld_conn_fails++;
3135 mutex_unlock(&dev->rdev.stats.lock);
3136 kfree_skb(rpl_skb);
3137 } else {
3138 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3139 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
3140 (__force u32) htonl(
3141 (__force u32) req->tid)));
3142 ret = pass_accept_req(dev, rpl_skb);
3143 if (!ret)
3144 kfree_skb(rpl_skb);
3145 }
3146 return;
3147 }
3148
3149 static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3150 {
3151 struct cpl_fw6_msg *rpl = cplhdr(skb);
3152 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3153
3154 switch (rpl->type) {
3155 case FW6_TYPE_CQE:
3156 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3157 break;
3158 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3159 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3160 switch (req->t_state) {
3161 case TCP_SYN_SENT:
3162 active_ofld_conn_reply(dev, skb, req);
3163 break;
3164 case TCP_SYN_RECV:
3165 passive_ofld_conn_reply(dev, skb, req);
3166 break;
3167 default:
3168 pr_err("%s unexpected ofld conn wr state %d\n",
3169 __func__, req->t_state);
3170 break;
3171 }
3172 break;
3173 }
3174 return 0;
3175 }
3176
3177 static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3178 {
3179 u32 l2info;
3180 u16 vlantag, len, hdr_len, eth_hdr_len;
3181 u8 intf;
3182 struct cpl_rx_pkt *cpl = cplhdr(skb);
3183 struct cpl_pass_accept_req *req;
3184 struct tcp_options_received tmp_opt;
3185 struct c4iw_dev *dev;
3186
3187 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3188 /* Store values from cpl_rx_pkt in temporary location. */
3189 vlantag = (__force u16) cpl->vlan;
3190 len = (__force u16) cpl->len;
3191 l2info = (__force u32) cpl->l2info;
3192 hdr_len = (__force u16) cpl->hdr_len;
3193 intf = cpl->iff;
3194
3195 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3196
3197 /*
3198 * We need to parse the TCP options from SYN packet.
3199 * to generate cpl_pass_accept_req.
3200 */
3201 memset(&tmp_opt, 0, sizeof(tmp_opt));
3202 tcp_clear_options(&tmp_opt);
3203 tcp_parse_options(skb, &tmp_opt, 0, NULL);
3204
3205 req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
3206 memset(req, 0, sizeof(*req));
3207 req->l2info = cpu_to_be16(V_SYN_INTF(intf) |
3208 V_SYN_MAC_IDX(G_RX_MACIDX(
3209 (__force int) htonl(l2info))) |
3210 F_SYN_XACT_MATCH);
3211 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
3212 G_RX_ETHHDR_LEN((__force int) htonl(l2info)) :
3213 G_RX_T5_ETHHDR_LEN((__force int) htonl(l2info));
3214 req->hdr_len = cpu_to_be32(V_SYN_RX_CHAN(G_RX_CHAN(
3215 (__force int) htonl(l2info))) |
3216 V_TCP_HDR_LEN(G_RX_TCPHDR_LEN(
3217 (__force int) htons(hdr_len))) |
3218 V_IP_HDR_LEN(G_RX_IPHDR_LEN(
3219 (__force int) htons(hdr_len))) |
3220 V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(eth_hdr_len)));
3221 req->vlan = (__force __be16) vlantag;
3222 req->len = (__force __be16) len;
3223 req->tos_stid = cpu_to_be32(PASS_OPEN_TID(stid) |
3224 PASS_OPEN_TOS(tos));
3225 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3226 if (tmp_opt.wscale_ok)
3227 req->tcpopt.wsf = tmp_opt.snd_wscale;
3228 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3229 if (tmp_opt.sack_ok)
3230 req->tcpopt.sack = 1;
3231 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3232 return;
3233 }
3234
3235 static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3236 __be32 laddr, __be16 lport,
3237 __be32 raddr, __be16 rport,
3238 u32 rcv_isn, u32 filter, u16 window,
3239 u32 rss_qid, u8 port_id)
3240 {
3241 struct sk_buff *req_skb;
3242 struct fw_ofld_connection_wr *req;
3243 struct cpl_pass_accept_req *cpl = cplhdr(skb);
3244
3245 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
3246 req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
3247 memset(req, 0, sizeof(*req));
3248 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL(1));
3249 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
3250 req->le.version_cpl = htonl(F_FW_OFLD_CONNECTION_WR_CPL);
3251 req->le.filter = (__force __be32) filter;
3252 req->le.lport = lport;
3253 req->le.pport = rport;
3254 req->le.u.ipv4.lip = laddr;
3255 req->le.u.ipv4.pip = raddr;
3256 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
3257 req->tcb.rcv_adv = htons(window);
3258 req->tcb.t_state_to_astid =
3259 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_RECV) |
3260 V_FW_OFLD_CONNECTION_WR_RCV_SCALE(cpl->tcpopt.wsf) |
3261 V_FW_OFLD_CONNECTION_WR_ASTID(
3262 GET_PASS_OPEN_TID(ntohl(cpl->tos_stid))));
3263
3264 /*
3265 * We store the qid in opt2 which will be used by the firmware
3266 * to send us the wr response.
3267 */
3268 req->tcb.opt2 = htonl(V_RSS_QUEUE(rss_qid));
3269
3270 /*
3271 * We initialize the MSS index in TCB to 0xF.
3272 * So that when driver sends cpl_pass_accept_rpl
3273 * TCB picks up the correct value. If this was 0
3274 * TP will ignore any value > 0 for MSS index.
3275 */
3276 req->tcb.opt0 = cpu_to_be64(V_MSS_IDX(0xF));
3277 req->cookie = (unsigned long)skb;
3278
3279 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
3280 cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
3281 }
3282
3283 /*
3284 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
3285 * messages when a filter is being used instead of server to
3286 * redirect a syn packet. When packets hit filter they are redirected
3287 * to the offload queue and driver tries to establish the connection
3288 * using firmware work request.
3289 */
3290 static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
3291 {
3292 int stid;
3293 unsigned int filter;
3294 struct ethhdr *eh = NULL;
3295 struct vlan_ethhdr *vlan_eh = NULL;
3296 struct iphdr *iph;
3297 struct tcphdr *tcph;
3298 struct rss_header *rss = (void *)skb->data;
3299 struct cpl_rx_pkt *cpl = (void *)skb->data;
3300 struct cpl_pass_accept_req *req = (void *)(rss + 1);
3301 struct l2t_entry *e;
3302 struct dst_entry *dst;
3303 struct c4iw_ep *lep;
3304 u16 window;
3305 struct port_info *pi;
3306 struct net_device *pdev;
3307 u16 rss_qid, eth_hdr_len;
3308 int step;
3309 u32 tx_chan;
3310 struct neighbour *neigh;
3311
3312 /* Drop all non-SYN packets */
3313 if (!(cpl->l2info & cpu_to_be32(F_RXF_SYN)))
3314 goto reject;
3315
3316 /*
3317 * Drop all packets which did not hit the filter.
3318 * Unlikely to happen.
3319 */
3320 if (!(rss->filter_hit && rss->filter_tid))
3321 goto reject;
3322
3323 /*
3324 * Calculate the server tid from filter hit index from cpl_rx_pkt.
3325 */
3326 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val)
3327 - dev->rdev.lldi.tids->sftid_base
3328 + dev->rdev.lldi.tids->nstids;
3329
3330 lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid);
3331 if (!lep) {
3332 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
3333 goto reject;
3334 }
3335
3336 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
3337 G_RX_ETHHDR_LEN(htonl(cpl->l2info)) :
3338 G_RX_T5_ETHHDR_LEN(htonl(cpl->l2info));
3339 if (eth_hdr_len == ETH_HLEN) {
3340 eh = (struct ethhdr *)(req + 1);
3341 iph = (struct iphdr *)(eh + 1);
3342 } else {
3343 vlan_eh = (struct vlan_ethhdr *)(req + 1);
3344 iph = (struct iphdr *)(vlan_eh + 1);
3345 skb->vlan_tci = ntohs(cpl->vlan);
3346 }
3347
3348 if (iph->version != 0x4)
3349 goto reject;
3350
3351 tcph = (struct tcphdr *)(iph + 1);
3352 skb_set_network_header(skb, (void *)iph - (void *)rss);
3353 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
3354 skb_get(skb);
3355
3356 PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
3357 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
3358 ntohs(tcph->source), iph->tos);
3359
3360 dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
3361 iph->tos);
3362 if (!dst) {
3363 pr_err("%s - failed to find dst entry!\n",
3364 __func__);
3365 goto reject;
3366 }
3367 neigh = dst_neigh_lookup_skb(dst, skb);
3368
3369 if (!neigh) {
3370 pr_err("%s - failed to allocate neigh!\n",
3371 __func__);
3372 goto free_dst;
3373 }
3374
3375 if (neigh->dev->flags & IFF_LOOPBACK) {
3376 pdev = ip_dev_find(&init_net, iph->daddr);
3377 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3378 pdev, 0);
3379 pi = (struct port_info *)netdev_priv(pdev);
3380 tx_chan = cxgb4_port_chan(pdev);
3381 dev_put(pdev);
3382 } else {
3383 pdev = get_real_dev(neigh->dev);
3384 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3385 pdev, 0);
3386 pi = (struct port_info *)netdev_priv(pdev);
3387 tx_chan = cxgb4_port_chan(pdev);
3388 }
3389 if (!e) {
3390 pr_err("%s - failed to allocate l2t entry!\n",
3391 __func__);
3392 goto free_dst;
3393 }
3394
3395 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
3396 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
3397 window = (__force u16) htons((__force u16)tcph->window);
3398
3399 /* Calcuate filter portion for LE region. */
3400 filter = (__force unsigned int) cpu_to_be32(select_ntuple(dev, dst, e));
3401
3402 /*
3403 * Synthesize the cpl_pass_accept_req. We have everything except the
3404 * TID. Once firmware sends a reply with TID we update the TID field
3405 * in cpl and pass it through the regular cpl_pass_accept_req path.
3406 */
3407 build_cpl_pass_accept_req(skb, stid, iph->tos);
3408 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
3409 tcph->source, ntohl(tcph->seq), filter, window,
3410 rss_qid, pi->port_id);
3411 cxgb4_l2t_release(e);
3412 free_dst:
3413 dst_release(dst);
3414 reject:
3415 return 0;
3416 }
3417
3418 /*
3419 * These are the real handlers that are called from a
3420 * work queue.
3421 */
3422 static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
3423 [CPL_ACT_ESTABLISH] = act_establish,
3424 [CPL_ACT_OPEN_RPL] = act_open_rpl,
3425 [CPL_RX_DATA] = rx_data,
3426 [CPL_ABORT_RPL_RSS] = abort_rpl,
3427 [CPL_ABORT_RPL] = abort_rpl,
3428 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
3429 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
3430 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
3431 [CPL_PASS_ESTABLISH] = pass_establish,
3432 [CPL_PEER_CLOSE] = peer_close,
3433 [CPL_ABORT_REQ_RSS] = peer_abort,
3434 [CPL_CLOSE_CON_RPL] = close_con_rpl,
3435 [CPL_RDMA_TERMINATE] = terminate,
3436 [CPL_FW4_ACK] = fw4_ack,
3437 [CPL_FW6_MSG] = deferred_fw6_msg,
3438 [CPL_RX_PKT] = rx_pkt
3439 };
3440
3441 static void process_timeout(struct c4iw_ep *ep)
3442 {
3443 struct c4iw_qp_attributes attrs;
3444 int abort = 1;
3445
3446 mutex_lock(&ep->com.mutex);
3447 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
3448 ep->com.state);
3449 set_bit(TIMEDOUT, &ep->com.history);
3450 switch (ep->com.state) {
3451 case MPA_REQ_SENT:
3452 __state_set(&ep->com, ABORTING);
3453 connect_reply_upcall(ep, -ETIMEDOUT);
3454 break;
3455 case MPA_REQ_WAIT:
3456 __state_set(&ep->com, ABORTING);
3457 break;
3458 case CLOSING:
3459 case MORIBUND:
3460 if (ep->com.cm_id && ep->com.qp) {
3461 attrs.next_state = C4IW_QP_STATE_ERROR;
3462 c4iw_modify_qp(ep->com.qp->rhp,
3463 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
3464 &attrs, 1);
3465 }
3466 __state_set(&ep->com, ABORTING);
3467 break;
3468 default:
3469 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
3470 __func__, ep, ep->hwtid, ep->com.state);
3471 abort = 0;
3472 }
3473 mutex_unlock(&ep->com.mutex);
3474 if (abort)
3475 abort_connection(ep, NULL, GFP_KERNEL);
3476 c4iw_put_ep(&ep->com);
3477 }
3478
3479 static void process_timedout_eps(void)
3480 {
3481 struct c4iw_ep *ep;
3482
3483 spin_lock_irq(&timeout_lock);
3484 while (!list_empty(&timeout_list)) {
3485 struct list_head *tmp;
3486
3487 tmp = timeout_list.next;
3488 list_del(tmp);
3489 spin_unlock_irq(&timeout_lock);
3490 ep = list_entry(tmp, struct c4iw_ep, entry);
3491 process_timeout(ep);
3492 spin_lock_irq(&timeout_lock);
3493 }
3494 spin_unlock_irq(&timeout_lock);
3495 }
3496
3497 static void process_work(struct work_struct *work)
3498 {
3499 struct sk_buff *skb = NULL;
3500 struct c4iw_dev *dev;
3501 struct cpl_act_establish *rpl;
3502 unsigned int opcode;
3503 int ret;
3504
3505 while ((skb = skb_dequeue(&rxq))) {
3506 rpl = cplhdr(skb);
3507 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3508 opcode = rpl->ot.opcode;
3509
3510 BUG_ON(!work_handlers[opcode]);
3511 ret = work_handlers[opcode](dev, skb);
3512 if (!ret)
3513 kfree_skb(skb);
3514 }
3515 process_timedout_eps();
3516 }
3517
3518 static DECLARE_WORK(skb_work, process_work);
3519
3520 static void ep_timeout(unsigned long arg)
3521 {
3522 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
3523 int kickit = 0;
3524
3525 spin_lock(&timeout_lock);
3526 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
3527 list_add_tail(&ep->entry, &timeout_list);
3528 kickit = 1;
3529 }
3530 spin_unlock(&timeout_lock);
3531 if (kickit)
3532 queue_work(workq, &skb_work);
3533 }
3534
3535 /*
3536 * All the CM events are handled on a work queue to have a safe context.
3537 */
3538 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
3539 {
3540
3541 /*
3542 * Save dev in the skb->cb area.
3543 */
3544 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
3545
3546 /*
3547 * Queue the skb and schedule the worker thread.
3548 */
3549 skb_queue_tail(&rxq, skb);
3550 queue_work(workq, &skb_work);
3551 return 0;
3552 }
3553
3554 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
3555 {
3556 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
3557
3558 if (rpl->status != CPL_ERR_NONE) {
3559 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
3560 "for tid %u\n", rpl->status, GET_TID(rpl));
3561 }
3562 kfree_skb(skb);
3563 return 0;
3564 }
3565
3566 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3567 {
3568 struct cpl_fw6_msg *rpl = cplhdr(skb);
3569 struct c4iw_wr_wait *wr_waitp;
3570 int ret;
3571
3572 PDBG("%s type %u\n", __func__, rpl->type);
3573
3574 switch (rpl->type) {
3575 case FW6_TYPE_WR_RPL:
3576 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
3577 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
3578 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
3579 if (wr_waitp)
3580 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
3581 kfree_skb(skb);
3582 break;
3583 case FW6_TYPE_CQE:
3584 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3585 sched(dev, skb);
3586 break;
3587 default:
3588 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
3589 rpl->type);
3590 kfree_skb(skb);
3591 break;
3592 }
3593 return 0;
3594 }
3595
3596 static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
3597 {
3598 struct cpl_abort_req_rss *req = cplhdr(skb);
3599 struct c4iw_ep *ep;
3600 struct tid_info *t = dev->rdev.lldi.tids;
3601 unsigned int tid = GET_TID(req);
3602
3603 ep = lookup_tid(t, tid);
3604 if (!ep) {
3605 printk(KERN_WARNING MOD
3606 "Abort on non-existent endpoint, tid %d\n", tid);
3607 kfree_skb(skb);
3608 return 0;
3609 }
3610 if (is_neg_adv_abort(req->status)) {
3611 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
3612 ep->hwtid);
3613 kfree_skb(skb);
3614 return 0;
3615 }
3616 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
3617 ep->com.state);
3618
3619 /*
3620 * Wake up any threads in rdma_init() or rdma_fini().
3621 * However, if we are on MPAv2 and want to retry with MPAv1
3622 * then, don't wake up yet.
3623 */
3624 if (mpa_rev == 2 && !ep->tried_with_mpa_v1) {
3625 if (ep->com.state != MPA_REQ_SENT)
3626 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
3627 } else
3628 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
3629 sched(dev, skb);
3630 return 0;
3631 }
3632
3633 /*
3634 * Most upcalls from the T4 Core go to sched() to
3635 * schedule the processing on a work queue.
3636 */
3637 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
3638 [CPL_ACT_ESTABLISH] = sched,
3639 [CPL_ACT_OPEN_RPL] = sched,
3640 [CPL_RX_DATA] = sched,
3641 [CPL_ABORT_RPL_RSS] = sched,
3642 [CPL_ABORT_RPL] = sched,
3643 [CPL_PASS_OPEN_RPL] = sched,
3644 [CPL_CLOSE_LISTSRV_RPL] = sched,
3645 [CPL_PASS_ACCEPT_REQ] = sched,
3646 [CPL_PASS_ESTABLISH] = sched,
3647 [CPL_PEER_CLOSE] = sched,
3648 [CPL_CLOSE_CON_RPL] = sched,
3649 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
3650 [CPL_RDMA_TERMINATE] = sched,
3651 [CPL_FW4_ACK] = sched,
3652 [CPL_SET_TCB_RPL] = set_tcb_rpl,
3653 [CPL_FW6_MSG] = fw6_msg,
3654 [CPL_RX_PKT] = sched
3655 };
3656
3657 int __init c4iw_cm_init(void)
3658 {
3659 spin_lock_init(&timeout_lock);
3660 skb_queue_head_init(&rxq);
3661
3662 workq = create_singlethread_workqueue("iw_cxgb4");
3663 if (!workq)
3664 return -ENOMEM;
3665
3666 return 0;
3667 }
3668
3669 void __exit c4iw_cm_term(void)
3670 {
3671 WARN_ON(!list_empty(&timeout_list));
3672 flush_workqueue(workq);
3673 destroy_workqueue(workq);
3674 }
Linux with added FPC-III support