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of: MSI: Simplify irqdomain lookup
[linux/fpc-iii.git] / drivers / infiniband / hw / cxgb4 / cm.c
blobc9cffced00ca1df11683b961d0cc48f983056a07
1 /*
2 * Copyright (c) 2009-2014 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 <rdma/ib_addr.h>
51
52 #include "iw_cxgb4.h"
53 #include "clip_tbl.h"
54
55 static char *states[] = {
56 "idle",
57 "listen",
58 "connecting",
59 "mpa_wait_req",
60 "mpa_req_sent",
61 "mpa_req_rcvd",
62 "mpa_rep_sent",
63 "fpdu_mode",
64 "aborting",
65 "closing",
66 "moribund",
67 "dead",
68 NULL,
69 };
70
71 static int nocong;
72 module_param(nocong, int, 0644);
73 MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
74
75 static int enable_ecn;
76 module_param(enable_ecn, int, 0644);
77 MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
78
79 static int dack_mode = 1;
80 module_param(dack_mode, int, 0644);
81 MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
82
83 uint c4iw_max_read_depth = 32;
84 module_param(c4iw_max_read_depth, int, 0644);
85 MODULE_PARM_DESC(c4iw_max_read_depth,
86 "Per-connection max ORD/IRD (default=32)");
87
88 static int enable_tcp_timestamps;
89 module_param(enable_tcp_timestamps, int, 0644);
90 MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
91
92 static int enable_tcp_sack;
93 module_param(enable_tcp_sack, int, 0644);
94 MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
95
96 static int enable_tcp_window_scaling = 1;
97 module_param(enable_tcp_window_scaling, int, 0644);
98 MODULE_PARM_DESC(enable_tcp_window_scaling,
99 "Enable tcp window scaling (default=1)");
100
101 int c4iw_debug;
102 module_param(c4iw_debug, int, 0644);
103 MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
104
105 static int peer2peer = 1;
106 module_param(peer2peer, int, 0644);
107 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
108
109 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
110 module_param(p2p_type, int, 0644);
111 MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
112 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
113
114 static int ep_timeout_secs = 60;
115 module_param(ep_timeout_secs, int, 0644);
116 MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
117 "in seconds (default=60)");
118
119 static int mpa_rev = 2;
120 module_param(mpa_rev, int, 0644);
121 MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
122 "1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft"
123 " compliant (default=2)");
124
125 static int markers_enabled;
126 module_param(markers_enabled, int, 0644);
127 MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
128
129 static int crc_enabled = 1;
130 module_param(crc_enabled, int, 0644);
131 MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
132
133 static int rcv_win = 256 * 1024;
134 module_param(rcv_win, int, 0644);
135 MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
136
137 static int snd_win = 128 * 1024;
138 module_param(snd_win, int, 0644);
139 MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
140
141 static struct workqueue_struct *workq;
142
143 static struct sk_buff_head rxq;
144
145 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
146 static void ep_timeout(unsigned long arg);
147 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
148
149 static LIST_HEAD(timeout_list);
150 static spinlock_t timeout_lock;
151
152 static void deref_qp(struct c4iw_ep *ep)
153 {
154 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
155 clear_bit(QP_REFERENCED, &ep->com.flags);
156 }
157
158 static void ref_qp(struct c4iw_ep *ep)
159 {
160 set_bit(QP_REFERENCED, &ep->com.flags);
161 c4iw_qp_add_ref(&ep->com.qp->ibqp);
162 }
163
164 static void start_ep_timer(struct c4iw_ep *ep)
165 {
166 PDBG("%s ep %p\n", __func__, ep);
167 if (timer_pending(&ep->timer)) {
168 pr_err("%s timer already started! ep %p\n",
169 __func__, ep);
170 return;
171 }
172 clear_bit(TIMEOUT, &ep->com.flags);
173 c4iw_get_ep(&ep->com);
174 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
175 ep->timer.data = (unsigned long)ep;
176 ep->timer.function = ep_timeout;
177 add_timer(&ep->timer);
178 }
179
180 static int stop_ep_timer(struct c4iw_ep *ep)
181 {
182 PDBG("%s ep %p stopping\n", __func__, ep);
183 del_timer_sync(&ep->timer);
184 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
185 c4iw_put_ep(&ep->com);
186 return 0;
187 }
188 return 1;
189 }
190
191 static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
192 struct l2t_entry *l2e)
193 {
194 int error = 0;
195
196 if (c4iw_fatal_error(rdev)) {
197 kfree_skb(skb);
198 PDBG("%s - device in error state - dropping\n", __func__);
199 return -EIO;
200 }
201 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
202 if (error < 0)
203 kfree_skb(skb);
204 return error < 0 ? error : 0;
205 }
206
207 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
208 {
209 int error = 0;
210
211 if (c4iw_fatal_error(rdev)) {
212 kfree_skb(skb);
213 PDBG("%s - device in error state - dropping\n", __func__);
214 return -EIO;
215 }
216 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
217 if (error < 0)
218 kfree_skb(skb);
219 return error < 0 ? error : 0;
220 }
221
222 static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
223 {
224 struct cpl_tid_release *req;
225
226 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
227 if (!skb)
228 return;
229 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
230 INIT_TP_WR(req, hwtid);
231 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
232 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
233 c4iw_ofld_send(rdev, skb);
234 return;
235 }
236
237 static void set_emss(struct c4iw_ep *ep, u16 opt)
238 {
239 ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] -
240 ((AF_INET == ep->com.remote_addr.ss_family) ?
241 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
242 sizeof(struct tcphdr);
243 ep->mss = ep->emss;
244 if (TCPOPT_TSTAMP_G(opt))
245 ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
246 if (ep->emss < 128)
247 ep->emss = 128;
248 if (ep->emss & 7)
249 PDBG("Warning: misaligned mtu idx %u mss %u emss=%u\n",
250 TCPOPT_MSS_G(opt), ep->mss, ep->emss);
251 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt),
252 ep->mss, ep->emss);
253 }
254
255 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
256 {
257 enum c4iw_ep_state state;
258
259 mutex_lock(&epc->mutex);
260 state = epc->state;
261 mutex_unlock(&epc->mutex);
262 return state;
263 }
264
265 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
266 {
267 epc->state = new;
268 }
269
270 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
271 {
272 mutex_lock(&epc->mutex);
273 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
274 __state_set(epc, new);
275 mutex_unlock(&epc->mutex);
276 return;
277 }
278
279 static void *alloc_ep(int size, gfp_t gfp)
280 {
281 struct c4iw_ep_common *epc;
282
283 epc = kzalloc(size, gfp);
284 if (epc) {
285 kref_init(&epc->kref);
286 mutex_init(&epc->mutex);
287 c4iw_init_wr_wait(&epc->wr_wait);
288 }
289 PDBG("%s alloc ep %p\n", __func__, epc);
290 return epc;
291 }
292
293 void _c4iw_free_ep(struct kref *kref)
294 {
295 struct c4iw_ep *ep;
296
297 ep = container_of(kref, struct c4iw_ep, com.kref);
298 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
299 if (test_bit(QP_REFERENCED, &ep->com.flags))
300 deref_qp(ep);
301 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
302 if (ep->com.remote_addr.ss_family == AF_INET6) {
303 struct sockaddr_in6 *sin6 =
304 (struct sockaddr_in6 *)
305 &ep->com.mapped_local_addr;
306
307 cxgb4_clip_release(
308 ep->com.dev->rdev.lldi.ports[0],
309 (const u32 *)&sin6->sin6_addr.s6_addr,
310 1);
311 }
312 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
313 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
314 dst_release(ep->dst);
315 cxgb4_l2t_release(ep->l2t);
316 }
317 if (test_bit(RELEASE_MAPINFO, &ep->com.flags)) {
318 print_addr(&ep->com, __func__, "remove_mapinfo/mapping");
319 iwpm_remove_mapinfo(&ep->com.local_addr,
320 &ep->com.mapped_local_addr);
321 iwpm_remove_mapping(&ep->com.local_addr, RDMA_NL_C4IW);
322 }
323 kfree(ep);
324 }
325
326 static void release_ep_resources(struct c4iw_ep *ep)
327 {
328 set_bit(RELEASE_RESOURCES, &ep->com.flags);
329 c4iw_put_ep(&ep->com);
330 }
331
332 static int status2errno(int status)
333 {
334 switch (status) {
335 case CPL_ERR_NONE:
336 return 0;
337 case CPL_ERR_CONN_RESET:
338 return -ECONNRESET;
339 case CPL_ERR_ARP_MISS:
340 return -EHOSTUNREACH;
341 case CPL_ERR_CONN_TIMEDOUT:
342 return -ETIMEDOUT;
343 case CPL_ERR_TCAM_FULL:
344 return -ENOMEM;
345 case CPL_ERR_CONN_EXIST:
346 return -EADDRINUSE;
347 default:
348 return -EIO;
349 }
350 }
351
352 /*
353 * Try and reuse skbs already allocated...
354 */
355 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
356 {
357 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
358 skb_trim(skb, 0);
359 skb_get(skb);
360 skb_reset_transport_header(skb);
361 } else {
362 skb = alloc_skb(len, gfp);
363 }
364 t4_set_arp_err_handler(skb, NULL, NULL);
365 return skb;
366 }
367
368 static struct net_device *get_real_dev(struct net_device *egress_dev)
369 {
370 return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
371 }
372
373 static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
374 {
375 int i;
376
377 egress_dev = get_real_dev(egress_dev);
378 for (i = 0; i < dev->rdev.lldi.nports; i++)
379 if (dev->rdev.lldi.ports[i] == egress_dev)
380 return 1;
381 return 0;
382 }
383
384 static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
385 __u8 *peer_ip, __be16 local_port,
386 __be16 peer_port, u8 tos,
387 __u32 sin6_scope_id)
388 {
389 struct dst_entry *dst = NULL;
390
391 if (IS_ENABLED(CONFIG_IPV6)) {
392 struct flowi6 fl6;
393
394 memset(&fl6, 0, sizeof(fl6));
395 memcpy(&fl6.daddr, peer_ip, 16);
396 memcpy(&fl6.saddr, local_ip, 16);
397 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
398 fl6.flowi6_oif = sin6_scope_id;
399 dst = ip6_route_output(&init_net, NULL, &fl6);
400 if (!dst)
401 goto out;
402 if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
403 !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
404 dst_release(dst);
405 dst = NULL;
406 }
407 }
408
409 out:
410 return dst;
411 }
412
413 static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip,
414 __be32 peer_ip, __be16 local_port,
415 __be16 peer_port, u8 tos)
416 {
417 struct rtable *rt;
418 struct flowi4 fl4;
419 struct neighbour *n;
420
421 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
422 peer_port, local_port, IPPROTO_TCP,
423 tos, 0);
424 if (IS_ERR(rt))
425 return NULL;
426 n = dst_neigh_lookup(&rt->dst, &peer_ip);
427 if (!n)
428 return NULL;
429 if (!our_interface(dev, n->dev) &&
430 !(n->dev->flags & IFF_LOOPBACK)) {
431 neigh_release(n);
432 dst_release(&rt->dst);
433 return NULL;
434 }
435 neigh_release(n);
436 return &rt->dst;
437 }
438
439 static void arp_failure_discard(void *handle, struct sk_buff *skb)
440 {
441 PDBG("%s c4iw_dev %p\n", __func__, handle);
442 kfree_skb(skb);
443 }
444
445 /*
446 * Handle an ARP failure for an active open.
447 */
448 static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
449 {
450 struct c4iw_ep *ep = handle;
451
452 printk(KERN_ERR MOD "ARP failure duing connect\n");
453 kfree_skb(skb);
454 connect_reply_upcall(ep, -EHOSTUNREACH);
455 state_set(&ep->com, DEAD);
456 if (ep->com.remote_addr.ss_family == AF_INET6) {
457 struct sockaddr_in6 *sin6 =
458 (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
459 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
460 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
461 }
462 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
463 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
464 dst_release(ep->dst);
465 cxgb4_l2t_release(ep->l2t);
466 c4iw_put_ep(&ep->com);
467 }
468
469 /*
470 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
471 * and send it along.
472 */
473 static void abort_arp_failure(void *handle, struct sk_buff *skb)
474 {
475 struct c4iw_rdev *rdev = handle;
476 struct cpl_abort_req *req = cplhdr(skb);
477
478 PDBG("%s rdev %p\n", __func__, rdev);
479 req->cmd = CPL_ABORT_NO_RST;
480 c4iw_ofld_send(rdev, skb);
481 }
482
483 static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
484 {
485 unsigned int flowclen = 80;
486 struct fw_flowc_wr *flowc;
487 int i;
488
489 skb = get_skb(skb, flowclen, GFP_KERNEL);
490 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
491
492 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
493 FW_FLOWC_WR_NPARAMS_V(8));
494 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(DIV_ROUND_UP(flowclen,
495 16)) | FW_WR_FLOWID_V(ep->hwtid));
496
497 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
498 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
499 (ep->com.dev->rdev.lldi.pf));
500 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
501 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
502 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
503 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
504 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
505 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
506 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
507 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
508 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
509 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
510 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
511 flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
512 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
513 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
514 /* Pad WR to 16 byte boundary */
515 flowc->mnemval[8].mnemonic = 0;
516 flowc->mnemval[8].val = 0;
517 for (i = 0; i < 9; i++) {
518 flowc->mnemval[i].r4[0] = 0;
519 flowc->mnemval[i].r4[1] = 0;
520 flowc->mnemval[i].r4[2] = 0;
521 }
522
523 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
524 c4iw_ofld_send(&ep->com.dev->rdev, skb);
525 }
526
527 static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
528 {
529 struct cpl_close_con_req *req;
530 struct sk_buff *skb;
531 int wrlen = roundup(sizeof *req, 16);
532
533 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
534 skb = get_skb(NULL, wrlen, gfp);
535 if (!skb) {
536 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
537 return -ENOMEM;
538 }
539 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
540 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
541 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
542 memset(req, 0, wrlen);
543 INIT_TP_WR(req, ep->hwtid);
544 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
545 ep->hwtid));
546 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
547 }
548
549 static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
550 {
551 struct cpl_abort_req *req;
552 int wrlen = roundup(sizeof *req, 16);
553
554 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
555 skb = get_skb(skb, wrlen, gfp);
556 if (!skb) {
557 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
558 __func__);
559 return -ENOMEM;
560 }
561 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
562 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
563 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
564 memset(req, 0, wrlen);
565 INIT_TP_WR(req, ep->hwtid);
566 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
567 req->cmd = CPL_ABORT_SEND_RST;
568 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
569 }
570
571 /*
572 * c4iw_form_pm_msg - Form a port mapper message with mapping info
573 */
574 static void c4iw_form_pm_msg(struct c4iw_ep *ep,
575 struct iwpm_sa_data *pm_msg)
576 {
577 memcpy(&pm_msg->loc_addr, &ep->com.local_addr,
578 sizeof(ep->com.local_addr));
579 memcpy(&pm_msg->rem_addr, &ep->com.remote_addr,
580 sizeof(ep->com.remote_addr));
581 }
582
583 /*
584 * c4iw_form_reg_msg - Form a port mapper message with dev info
585 */
586 static void c4iw_form_reg_msg(struct c4iw_dev *dev,
587 struct iwpm_dev_data *pm_msg)
588 {
589 memcpy(pm_msg->dev_name, dev->ibdev.name, IWPM_DEVNAME_SIZE);
590 memcpy(pm_msg->if_name, dev->rdev.lldi.ports[0]->name,
591 IWPM_IFNAME_SIZE);
592 }
593
594 static void c4iw_record_pm_msg(struct c4iw_ep *ep,
595 struct iwpm_sa_data *pm_msg)
596 {
597 memcpy(&ep->com.mapped_local_addr, &pm_msg->mapped_loc_addr,
598 sizeof(ep->com.mapped_local_addr));
599 memcpy(&ep->com.mapped_remote_addr, &pm_msg->mapped_rem_addr,
600 sizeof(ep->com.mapped_remote_addr));
601 }
602
603 static int get_remote_addr(struct c4iw_ep *parent_ep, struct c4iw_ep *child_ep)
604 {
605 int ret;
606
607 print_addr(&parent_ep->com, __func__, "get_remote_addr parent_ep ");
608 print_addr(&child_ep->com, __func__, "get_remote_addr child_ep ");
609
610 ret = iwpm_get_remote_info(&parent_ep->com.mapped_local_addr,
611 &child_ep->com.mapped_remote_addr,
612 &child_ep->com.remote_addr, RDMA_NL_C4IW);
613 if (ret)
614 PDBG("Unable to find remote peer addr info - err %d\n", ret);
615
616 return ret;
617 }
618
619 static void best_mtu(const unsigned short *mtus, unsigned short mtu,
620 unsigned int *idx, int use_ts, int ipv6)
621 {
622 unsigned short hdr_size = (ipv6 ?
623 sizeof(struct ipv6hdr) :
624 sizeof(struct iphdr)) +
625 sizeof(struct tcphdr) +
626 (use_ts ?
627 round_up(TCPOLEN_TIMESTAMP, 4) : 0);
628 unsigned short data_size = mtu - hdr_size;
629
630 cxgb4_best_aligned_mtu(mtus, hdr_size, data_size, 8, idx);
631 }
632
633 static int send_connect(struct c4iw_ep *ep)
634 {
635 struct cpl_act_open_req *req = NULL;
636 struct cpl_t5_act_open_req *t5req = NULL;
637 struct cpl_t6_act_open_req *t6req = NULL;
638 struct cpl_act_open_req6 *req6 = NULL;
639 struct cpl_t5_act_open_req6 *t5req6 = NULL;
640 struct cpl_t6_act_open_req6 *t6req6 = NULL;
641 struct sk_buff *skb;
642 u64 opt0;
643 u32 opt2;
644 unsigned int mtu_idx;
645 int wscale;
646 int win, sizev4, sizev6, wrlen;
647 struct sockaddr_in *la = (struct sockaddr_in *)
648 &ep->com.mapped_local_addr;
649 struct sockaddr_in *ra = (struct sockaddr_in *)
650 &ep->com.mapped_remote_addr;
651 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
652 &ep->com.mapped_local_addr;
653 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
654 &ep->com.mapped_remote_addr;
655 int ret;
656 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
657 u32 isn = (prandom_u32() & ~7UL) - 1;
658
659 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
660 case CHELSIO_T4:
661 sizev4 = sizeof(struct cpl_act_open_req);
662 sizev6 = sizeof(struct cpl_act_open_req6);
663 break;
664 case CHELSIO_T5:
665 sizev4 = sizeof(struct cpl_t5_act_open_req);
666 sizev6 = sizeof(struct cpl_t5_act_open_req6);
667 break;
668 case CHELSIO_T6:
669 sizev4 = sizeof(struct cpl_t6_act_open_req);
670 sizev6 = sizeof(struct cpl_t6_act_open_req6);
671 break;
672 default:
673 pr_err("T%d Chip is not supported\n",
674 CHELSIO_CHIP_VERSION(adapter_type));
675 return -EINVAL;
676 }
677
678 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
679 roundup(sizev4, 16) :
680 roundup(sizev6, 16);
681
682 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
683
684 skb = get_skb(NULL, wrlen, GFP_KERNEL);
685 if (!skb) {
686 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
687 __func__);
688 return -ENOMEM;
689 }
690 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
691
692 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
693 enable_tcp_timestamps,
694 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
695 wscale = compute_wscale(rcv_win);
696
697 /*
698 * Specify the largest window that will fit in opt0. The
699 * remainder will be specified in the rx_data_ack.
700 */
701 win = ep->rcv_win >> 10;
702 if (win > RCV_BUFSIZ_M)
703 win = RCV_BUFSIZ_M;
704
705 opt0 = (nocong ? NO_CONG_F : 0) |
706 KEEP_ALIVE_F |
707 DELACK_F |
708 WND_SCALE_V(wscale) |
709 MSS_IDX_V(mtu_idx) |
710 L2T_IDX_V(ep->l2t->idx) |
711 TX_CHAN_V(ep->tx_chan) |
712 SMAC_SEL_V(ep->smac_idx) |
713 DSCP_V(ep->tos) |
714 ULP_MODE_V(ULP_MODE_TCPDDP) |
715 RCV_BUFSIZ_V(win);
716 opt2 = RX_CHANNEL_V(0) |
717 CCTRL_ECN_V(enable_ecn) |
718 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
719 if (enable_tcp_timestamps)
720 opt2 |= TSTAMPS_EN_F;
721 if (enable_tcp_sack)
722 opt2 |= SACK_EN_F;
723 if (wscale && enable_tcp_window_scaling)
724 opt2 |= WND_SCALE_EN_F;
725 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
726 if (peer2peer)
727 isn += 4;
728
729 opt2 |= T5_OPT_2_VALID_F;
730 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
731 opt2 |= T5_ISS_F;
732 }
733
734 if (ep->com.remote_addr.ss_family == AF_INET6)
735 cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
736 (const u32 *)&la6->sin6_addr.s6_addr, 1);
737
738 t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
739
740 if (ep->com.remote_addr.ss_family == AF_INET) {
741 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
742 case CHELSIO_T4:
743 req = (struct cpl_act_open_req *)skb_put(skb, wrlen);
744 INIT_TP_WR(req, 0);
745 break;
746 case CHELSIO_T5:
747 t5req = (struct cpl_t5_act_open_req *)skb_put(skb,
748 wrlen);
749 INIT_TP_WR(t5req, 0);
750 req = (struct cpl_act_open_req *)t5req;
751 break;
752 case CHELSIO_T6:
753 t6req = (struct cpl_t6_act_open_req *)skb_put(skb,
754 wrlen);
755 INIT_TP_WR(t6req, 0);
756 req = (struct cpl_act_open_req *)t6req;
757 t5req = (struct cpl_t5_act_open_req *)t6req;
758 break;
759 default:
760 pr_err("T%d Chip is not supported\n",
761 CHELSIO_CHIP_VERSION(adapter_type));
762 ret = -EINVAL;
763 goto clip_release;
764 }
765
766 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
767 ((ep->rss_qid<<14) | ep->atid)));
768 req->local_port = la->sin_port;
769 req->peer_port = ra->sin_port;
770 req->local_ip = la->sin_addr.s_addr;
771 req->peer_ip = ra->sin_addr.s_addr;
772 req->opt0 = cpu_to_be64(opt0);
773
774 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
775 req->params = cpu_to_be32(cxgb4_select_ntuple(
776 ep->com.dev->rdev.lldi.ports[0],
777 ep->l2t));
778 req->opt2 = cpu_to_be32(opt2);
779 } else {
780 t5req->params = cpu_to_be64(FILTER_TUPLE_V(
781 cxgb4_select_ntuple(
782 ep->com.dev->rdev.lldi.ports[0],
783 ep->l2t)));
784 t5req->rsvd = cpu_to_be32(isn);
785 PDBG("%s snd_isn %u\n", __func__, t5req->rsvd);
786 t5req->opt2 = cpu_to_be32(opt2);
787 }
788 } else {
789 switch (CHELSIO_CHIP_VERSION(adapter_type)) {
790 case CHELSIO_T4:
791 req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
792 INIT_TP_WR(req6, 0);
793 break;
794 case CHELSIO_T5:
795 t5req6 = (struct cpl_t5_act_open_req6 *)skb_put(skb,
796 wrlen);
797 INIT_TP_WR(t5req6, 0);
798 req6 = (struct cpl_act_open_req6 *)t5req6;
799 break;
800 case CHELSIO_T6:
801 t6req6 = (struct cpl_t6_act_open_req6 *)skb_put(skb,
802 wrlen);
803 INIT_TP_WR(t6req6, 0);
804 req6 = (struct cpl_act_open_req6 *)t6req6;
805 t5req6 = (struct cpl_t5_act_open_req6 *)t6req6;
806 break;
807 default:
808 pr_err("T%d Chip is not supported\n",
809 CHELSIO_CHIP_VERSION(adapter_type));
810 ret = -EINVAL;
811 goto clip_release;
812 }
813
814 OPCODE_TID(req6) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
815 ((ep->rss_qid<<14)|ep->atid)));
816 req6->local_port = la6->sin6_port;
817 req6->peer_port = ra6->sin6_port;
818 req6->local_ip_hi = *((__be64 *)(la6->sin6_addr.s6_addr));
819 req6->local_ip_lo = *((__be64 *)(la6->sin6_addr.s6_addr + 8));
820 req6->peer_ip_hi = *((__be64 *)(ra6->sin6_addr.s6_addr));
821 req6->peer_ip_lo = *((__be64 *)(ra6->sin6_addr.s6_addr + 8));
822 req6->opt0 = cpu_to_be64(opt0);
823
824 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
825 req6->params = cpu_to_be32(cxgb4_select_ntuple(
826 ep->com.dev->rdev.lldi.ports[0],
827 ep->l2t));
828 req6->opt2 = cpu_to_be32(opt2);
829 } else {
830 t5req6->params = cpu_to_be64(FILTER_TUPLE_V(
831 cxgb4_select_ntuple(
832 ep->com.dev->rdev.lldi.ports[0],
833 ep->l2t)));
834 t5req6->rsvd = cpu_to_be32(isn);
835 PDBG("%s snd_isn %u\n", __func__, t5req6->rsvd);
836 t5req6->opt2 = cpu_to_be32(opt2);
837 }
838 }
839
840 set_bit(ACT_OPEN_REQ, &ep->com.history);
841 ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
842 clip_release:
843 if (ret && ep->com.remote_addr.ss_family == AF_INET6)
844 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
845 (const u32 *)&la6->sin6_addr.s6_addr, 1);
846 return ret;
847 }
848
849 static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
850 u8 mpa_rev_to_use)
851 {
852 int mpalen, wrlen;
853 struct fw_ofld_tx_data_wr *req;
854 struct mpa_message *mpa;
855 struct mpa_v2_conn_params mpa_v2_params;
856
857 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
858
859 BUG_ON(skb_cloned(skb));
860
861 mpalen = sizeof(*mpa) + ep->plen;
862 if (mpa_rev_to_use == 2)
863 mpalen += sizeof(struct mpa_v2_conn_params);
864 wrlen = roundup(mpalen + sizeof *req, 16);
865 skb = get_skb(skb, wrlen, GFP_KERNEL);
866 if (!skb) {
867 connect_reply_upcall(ep, -ENOMEM);
868 return;
869 }
870 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
871
872 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
873 memset(req, 0, wrlen);
874 req->op_to_immdlen = cpu_to_be32(
875 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
876 FW_WR_COMPL_F |
877 FW_WR_IMMDLEN_V(mpalen));
878 req->flowid_len16 = cpu_to_be32(
879 FW_WR_FLOWID_V(ep->hwtid) |
880 FW_WR_LEN16_V(wrlen >> 4));
881 req->plen = cpu_to_be32(mpalen);
882 req->tunnel_to_proxy = cpu_to_be32(
883 FW_OFLD_TX_DATA_WR_FLUSH_F |
884 FW_OFLD_TX_DATA_WR_SHOVE_F);
885
886 mpa = (struct mpa_message *)(req + 1);
887 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
888 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
889 (markers_enabled ? MPA_MARKERS : 0) |
890 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
891 mpa->private_data_size = htons(ep->plen);
892 mpa->revision = mpa_rev_to_use;
893 if (mpa_rev_to_use == 1) {
894 ep->tried_with_mpa_v1 = 1;
895 ep->retry_with_mpa_v1 = 0;
896 }
897
898 if (mpa_rev_to_use == 2) {
899 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
900 sizeof (struct mpa_v2_conn_params));
901 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
902 ep->ord);
903 mpa_v2_params.ird = htons((u16)ep->ird);
904 mpa_v2_params.ord = htons((u16)ep->ord);
905
906 if (peer2peer) {
907 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
908 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
909 mpa_v2_params.ord |=
910 htons(MPA_V2_RDMA_WRITE_RTR);
911 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
912 mpa_v2_params.ord |=
913 htons(MPA_V2_RDMA_READ_RTR);
914 }
915 memcpy(mpa->private_data, &mpa_v2_params,
916 sizeof(struct mpa_v2_conn_params));
917
918 if (ep->plen)
919 memcpy(mpa->private_data +
920 sizeof(struct mpa_v2_conn_params),
921 ep->mpa_pkt + sizeof(*mpa), ep->plen);
922 } else
923 if (ep->plen)
924 memcpy(mpa->private_data,
925 ep->mpa_pkt + sizeof(*mpa), ep->plen);
926
927 /*
928 * Reference the mpa skb. This ensures the data area
929 * will remain in memory until the hw acks the tx.
930 * Function fw4_ack() will deref it.
931 */
932 skb_get(skb);
933 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
934 BUG_ON(ep->mpa_skb);
935 ep->mpa_skb = skb;
936 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
937 start_ep_timer(ep);
938 __state_set(&ep->com, MPA_REQ_SENT);
939 ep->mpa_attr.initiator = 1;
940 ep->snd_seq += mpalen;
941 return;
942 }
943
944 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
945 {
946 int mpalen, wrlen;
947 struct fw_ofld_tx_data_wr *req;
948 struct mpa_message *mpa;
949 struct sk_buff *skb;
950 struct mpa_v2_conn_params mpa_v2_params;
951
952 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
953
954 mpalen = sizeof(*mpa) + plen;
955 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
956 mpalen += sizeof(struct mpa_v2_conn_params);
957 wrlen = roundup(mpalen + sizeof *req, 16);
958
959 skb = get_skb(NULL, wrlen, GFP_KERNEL);
960 if (!skb) {
961 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
962 return -ENOMEM;
963 }
964 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
965
966 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
967 memset(req, 0, wrlen);
968 req->op_to_immdlen = cpu_to_be32(
969 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
970 FW_WR_COMPL_F |
971 FW_WR_IMMDLEN_V(mpalen));
972 req->flowid_len16 = cpu_to_be32(
973 FW_WR_FLOWID_V(ep->hwtid) |
974 FW_WR_LEN16_V(wrlen >> 4));
975 req->plen = cpu_to_be32(mpalen);
976 req->tunnel_to_proxy = cpu_to_be32(
977 FW_OFLD_TX_DATA_WR_FLUSH_F |
978 FW_OFLD_TX_DATA_WR_SHOVE_F);
979
980 mpa = (struct mpa_message *)(req + 1);
981 memset(mpa, 0, sizeof(*mpa));
982 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
983 mpa->flags = MPA_REJECT;
984 mpa->revision = ep->mpa_attr.version;
985 mpa->private_data_size = htons(plen);
986
987 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
988 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
989 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
990 sizeof (struct mpa_v2_conn_params));
991 mpa_v2_params.ird = htons(((u16)ep->ird) |
992 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
993 0));
994 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
995 (p2p_type ==
996 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
997 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
998 FW_RI_INIT_P2PTYPE_READ_REQ ?
999 MPA_V2_RDMA_READ_RTR : 0) : 0));
1000 memcpy(mpa->private_data, &mpa_v2_params,
1001 sizeof(struct mpa_v2_conn_params));
1002
1003 if (ep->plen)
1004 memcpy(mpa->private_data +
1005 sizeof(struct mpa_v2_conn_params), pdata, plen);
1006 } else
1007 if (plen)
1008 memcpy(mpa->private_data, pdata, plen);
1009
1010 /*
1011 * Reference the mpa skb again. This ensures the data area
1012 * will remain in memory until the hw acks the tx.
1013 * Function fw4_ack() will deref it.
1014 */
1015 skb_get(skb);
1016 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1017 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
1018 BUG_ON(ep->mpa_skb);
1019 ep->mpa_skb = skb;
1020 ep->snd_seq += mpalen;
1021 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1022 }
1023
1024 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
1025 {
1026 int mpalen, wrlen;
1027 struct fw_ofld_tx_data_wr *req;
1028 struct mpa_message *mpa;
1029 struct sk_buff *skb;
1030 struct mpa_v2_conn_params mpa_v2_params;
1031
1032 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
1033
1034 mpalen = sizeof(*mpa) + plen;
1035 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
1036 mpalen += sizeof(struct mpa_v2_conn_params);
1037 wrlen = roundup(mpalen + sizeof *req, 16);
1038
1039 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1040 if (!skb) {
1041 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
1042 return -ENOMEM;
1043 }
1044 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1045
1046 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
1047 memset(req, 0, wrlen);
1048 req->op_to_immdlen = cpu_to_be32(
1049 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
1050 FW_WR_COMPL_F |
1051 FW_WR_IMMDLEN_V(mpalen));
1052 req->flowid_len16 = cpu_to_be32(
1053 FW_WR_FLOWID_V(ep->hwtid) |
1054 FW_WR_LEN16_V(wrlen >> 4));
1055 req->plen = cpu_to_be32(mpalen);
1056 req->tunnel_to_proxy = cpu_to_be32(
1057 FW_OFLD_TX_DATA_WR_FLUSH_F |
1058 FW_OFLD_TX_DATA_WR_SHOVE_F);
1059
1060 mpa = (struct mpa_message *)(req + 1);
1061 memset(mpa, 0, sizeof(*mpa));
1062 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1063 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
1064 (markers_enabled ? MPA_MARKERS : 0);
1065 mpa->revision = ep->mpa_attr.version;
1066 mpa->private_data_size = htons(plen);
1067
1068 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1069 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1070 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1071 sizeof (struct mpa_v2_conn_params));
1072 mpa_v2_params.ird = htons((u16)ep->ird);
1073 mpa_v2_params.ord = htons((u16)ep->ord);
1074 if (peer2peer && (ep->mpa_attr.p2p_type !=
1075 FW_RI_INIT_P2PTYPE_DISABLED)) {
1076 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1077
1078 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1079 mpa_v2_params.ord |=
1080 htons(MPA_V2_RDMA_WRITE_RTR);
1081 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1082 mpa_v2_params.ord |=
1083 htons(MPA_V2_RDMA_READ_RTR);
1084 }
1085
1086 memcpy(mpa->private_data, &mpa_v2_params,
1087 sizeof(struct mpa_v2_conn_params));
1088
1089 if (ep->plen)
1090 memcpy(mpa->private_data +
1091 sizeof(struct mpa_v2_conn_params), pdata, plen);
1092 } else
1093 if (plen)
1094 memcpy(mpa->private_data, pdata, plen);
1095
1096 /*
1097 * Reference the mpa skb. This ensures the data area
1098 * will remain in memory until the hw acks the tx.
1099 * Function fw4_ack() will deref it.
1100 */
1101 skb_get(skb);
1102 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
1103 ep->mpa_skb = skb;
1104 __state_set(&ep->com, MPA_REP_SENT);
1105 ep->snd_seq += mpalen;
1106 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1107 }
1108
1109 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1110 {
1111 struct c4iw_ep *ep;
1112 struct cpl_act_establish *req = cplhdr(skb);
1113 unsigned int tid = GET_TID(req);
1114 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
1115 struct tid_info *t = dev->rdev.lldi.tids;
1116
1117 ep = lookup_atid(t, atid);
1118
1119 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
1120 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
1121
1122 mutex_lock(&ep->com.mutex);
1123 dst_confirm(ep->dst);
1124
1125 /* setup the hwtid for this connection */
1126 ep->hwtid = tid;
1127 cxgb4_insert_tid(t, ep, tid);
1128 insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
1129
1130 ep->snd_seq = be32_to_cpu(req->snd_isn);
1131 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1132
1133 set_emss(ep, ntohs(req->tcp_opt));
1134
1135 /* dealloc the atid */
1136 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
1137 cxgb4_free_atid(t, atid);
1138 set_bit(ACT_ESTAB, &ep->com.history);
1139
1140 /* start MPA negotiation */
1141 send_flowc(ep, NULL);
1142 if (ep->retry_with_mpa_v1)
1143 send_mpa_req(ep, skb, 1);
1144 else
1145 send_mpa_req(ep, skb, mpa_rev);
1146 mutex_unlock(&ep->com.mutex);
1147 return 0;
1148 }
1149
1150 static void close_complete_upcall(struct c4iw_ep *ep, int status)
1151 {
1152 struct iw_cm_event event;
1153
1154 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1155 memset(&event, 0, sizeof(event));
1156 event.event = IW_CM_EVENT_CLOSE;
1157 event.status = status;
1158 if (ep->com.cm_id) {
1159 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
1160 ep, ep->com.cm_id, ep->hwtid);
1161 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1162 ep->com.cm_id->rem_ref(ep->com.cm_id);
1163 ep->com.cm_id = NULL;
1164 set_bit(CLOSE_UPCALL, &ep->com.history);
1165 }
1166 }
1167
1168 static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
1169 {
1170 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1171 __state_set(&ep->com, ABORTING);
1172 set_bit(ABORT_CONN, &ep->com.history);
1173 return send_abort(ep, skb, gfp);
1174 }
1175
1176 static void peer_close_upcall(struct c4iw_ep *ep)
1177 {
1178 struct iw_cm_event event;
1179
1180 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1181 memset(&event, 0, sizeof(event));
1182 event.event = IW_CM_EVENT_DISCONNECT;
1183 if (ep->com.cm_id) {
1184 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
1185 ep, ep->com.cm_id, ep->hwtid);
1186 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1187 set_bit(DISCONN_UPCALL, &ep->com.history);
1188 }
1189 }
1190
1191 static void peer_abort_upcall(struct c4iw_ep *ep)
1192 {
1193 struct iw_cm_event event;
1194
1195 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1196 memset(&event, 0, sizeof(event));
1197 event.event = IW_CM_EVENT_CLOSE;
1198 event.status = -ECONNRESET;
1199 if (ep->com.cm_id) {
1200 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
1201 ep->com.cm_id, ep->hwtid);
1202 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1203 ep->com.cm_id->rem_ref(ep->com.cm_id);
1204 ep->com.cm_id = NULL;
1205 set_bit(ABORT_UPCALL, &ep->com.history);
1206 }
1207 }
1208
1209 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1210 {
1211 struct iw_cm_event event;
1212
1213 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
1214 memset(&event, 0, sizeof(event));
1215 event.event = IW_CM_EVENT_CONNECT_REPLY;
1216 event.status = status;
1217 memcpy(&event.local_addr, &ep->com.local_addr,
1218 sizeof(ep->com.local_addr));
1219 memcpy(&event.remote_addr, &ep->com.remote_addr,
1220 sizeof(ep->com.remote_addr));
1221
1222 if ((status == 0) || (status == -ECONNREFUSED)) {
1223 if (!ep->tried_with_mpa_v1) {
1224 /* this means MPA_v2 is used */
1225 event.ord = ep->ird;
1226 event.ird = ep->ord;
1227 event.private_data_len = ep->plen -
1228 sizeof(struct mpa_v2_conn_params);
1229 event.private_data = ep->mpa_pkt +
1230 sizeof(struct mpa_message) +
1231 sizeof(struct mpa_v2_conn_params);
1232 } else {
1233 /* this means MPA_v1 is used */
1234 event.ord = cur_max_read_depth(ep->com.dev);
1235 event.ird = cur_max_read_depth(ep->com.dev);
1236 event.private_data_len = ep->plen;
1237 event.private_data = ep->mpa_pkt +
1238 sizeof(struct mpa_message);
1239 }
1240 }
1241
1242 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
1243 ep->hwtid, status);
1244 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1245 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1246
1247 if (status < 0) {
1248 ep->com.cm_id->rem_ref(ep->com.cm_id);
1249 ep->com.cm_id = NULL;
1250 }
1251 }
1252
1253 static int connect_request_upcall(struct c4iw_ep *ep)
1254 {
1255 struct iw_cm_event event;
1256 int ret;
1257
1258 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1259 memset(&event, 0, sizeof(event));
1260 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1261 memcpy(&event.local_addr, &ep->com.local_addr,
1262 sizeof(ep->com.local_addr));
1263 memcpy(&event.remote_addr, &ep->com.remote_addr,
1264 sizeof(ep->com.remote_addr));
1265 event.provider_data = ep;
1266 if (!ep->tried_with_mpa_v1) {
1267 /* this means MPA_v2 is used */
1268 event.ord = ep->ord;
1269 event.ird = ep->ird;
1270 event.private_data_len = ep->plen -
1271 sizeof(struct mpa_v2_conn_params);
1272 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1273 sizeof(struct mpa_v2_conn_params);
1274 } else {
1275 /* this means MPA_v1 is used. Send max supported */
1276 event.ord = cur_max_read_depth(ep->com.dev);
1277 event.ird = cur_max_read_depth(ep->com.dev);
1278 event.private_data_len = ep->plen;
1279 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1280 }
1281 c4iw_get_ep(&ep->com);
1282 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1283 &event);
1284 if (ret)
1285 c4iw_put_ep(&ep->com);
1286 set_bit(CONNREQ_UPCALL, &ep->com.history);
1287 c4iw_put_ep(&ep->parent_ep->com);
1288 return ret;
1289 }
1290
1291 static void established_upcall(struct c4iw_ep *ep)
1292 {
1293 struct iw_cm_event event;
1294
1295 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1296 memset(&event, 0, sizeof(event));
1297 event.event = IW_CM_EVENT_ESTABLISHED;
1298 event.ird = ep->ord;
1299 event.ord = ep->ird;
1300 if (ep->com.cm_id) {
1301 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1302 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1303 set_bit(ESTAB_UPCALL, &ep->com.history);
1304 }
1305 }
1306
1307 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1308 {
1309 struct cpl_rx_data_ack *req;
1310 struct sk_buff *skb;
1311 int wrlen = roundup(sizeof *req, 16);
1312
1313 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1314 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1315 if (!skb) {
1316 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
1317 return 0;
1318 }
1319
1320 /*
1321 * If we couldn't specify the entire rcv window at connection setup
1322 * due to the limit in the number of bits in the RCV_BUFSIZ field,
1323 * then add the overage in to the credits returned.
1324 */
1325 if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
1326 credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
1327
1328 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
1329 memset(req, 0, wrlen);
1330 INIT_TP_WR(req, ep->hwtid);
1331 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
1332 ep->hwtid));
1333 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK_F |
1334 RX_DACK_CHANGE_F |
1335 RX_DACK_MODE_V(dack_mode));
1336 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1337 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1338 return credits;
1339 }
1340
1341 #define RELAXED_IRD_NEGOTIATION 1
1342
1343 static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1344 {
1345 struct mpa_message *mpa;
1346 struct mpa_v2_conn_params *mpa_v2_params;
1347 u16 plen;
1348 u16 resp_ird, resp_ord;
1349 u8 rtr_mismatch = 0, insuff_ird = 0;
1350 struct c4iw_qp_attributes attrs;
1351 enum c4iw_qp_attr_mask mask;
1352 int err;
1353 int disconnect = 0;
1354
1355 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1356
1357 /*
1358 * Stop mpa timer. If it expired, then
1359 * we ignore the MPA reply. process_timeout()
1360 * will abort the connection.
1361 */
1362 if (stop_ep_timer(ep))
1363 return 0;
1364
1365 /*
1366 * If we get more than the supported amount of private data
1367 * then we must fail this connection.
1368 */
1369 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1370 err = -EINVAL;
1371 goto err;
1372 }
1373
1374 /*
1375 * copy the new data into our accumulation buffer.
1376 */
1377 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1378 skb->len);
1379 ep->mpa_pkt_len += skb->len;
1380
1381 /*
1382 * if we don't even have the mpa message, then bail.
1383 */
1384 if (ep->mpa_pkt_len < sizeof(*mpa))
1385 return 0;
1386 mpa = (struct mpa_message *) ep->mpa_pkt;
1387
1388 /* Validate MPA header. */
1389 if (mpa->revision > mpa_rev) {
1390 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1391 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1392 err = -EPROTO;
1393 goto err;
1394 }
1395 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1396 err = -EPROTO;
1397 goto err;
1398 }
1399
1400 plen = ntohs(mpa->private_data_size);
1401
1402 /*
1403 * Fail if there's too much private data.
1404 */
1405 if (plen > MPA_MAX_PRIVATE_DATA) {
1406 err = -EPROTO;
1407 goto err;
1408 }
1409
1410 /*
1411 * If plen does not account for pkt size
1412 */
1413 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1414 err = -EPROTO;
1415 goto err;
1416 }
1417
1418 ep->plen = (u8) plen;
1419
1420 /*
1421 * If we don't have all the pdata yet, then bail.
1422 * We'll continue process when more data arrives.
1423 */
1424 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1425 return 0;
1426
1427 if (mpa->flags & MPA_REJECT) {
1428 err = -ECONNREFUSED;
1429 goto err;
1430 }
1431
1432 /*
1433 * If we get here we have accumulated the entire mpa
1434 * start reply message including private data. And
1435 * the MPA header is valid.
1436 */
1437 __state_set(&ep->com, FPDU_MODE);
1438 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1439 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1440 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1441 ep->mpa_attr.version = mpa->revision;
1442 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1443
1444 if (mpa->revision == 2) {
1445 ep->mpa_attr.enhanced_rdma_conn =
1446 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1447 if (ep->mpa_attr.enhanced_rdma_conn) {
1448 mpa_v2_params = (struct mpa_v2_conn_params *)
1449 (ep->mpa_pkt + sizeof(*mpa));
1450 resp_ird = ntohs(mpa_v2_params->ird) &
1451 MPA_V2_IRD_ORD_MASK;
1452 resp_ord = ntohs(mpa_v2_params->ord) &
1453 MPA_V2_IRD_ORD_MASK;
1454 PDBG("%s responder ird %u ord %u ep ird %u ord %u\n",
1455 __func__, resp_ird, resp_ord, ep->ird, ep->ord);
1456
1457 /*
1458 * This is a double-check. Ideally, below checks are
1459 * not required since ird/ord stuff has been taken
1460 * care of in c4iw_accept_cr
1461 */
1462 if (ep->ird < resp_ord) {
1463 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
1464 ep->com.dev->rdev.lldi.max_ordird_qp)
1465 ep->ird = resp_ord;
1466 else
1467 insuff_ird = 1;
1468 } else if (ep->ird > resp_ord) {
1469 ep->ird = resp_ord;
1470 }
1471 if (ep->ord > resp_ird) {
1472 if (RELAXED_IRD_NEGOTIATION)
1473 ep->ord = resp_ird;
1474 else
1475 insuff_ird = 1;
1476 }
1477 if (insuff_ird) {
1478 err = -ENOMEM;
1479 ep->ird = resp_ord;
1480 ep->ord = resp_ird;
1481 }
1482
1483 if (ntohs(mpa_v2_params->ird) &
1484 MPA_V2_PEER2PEER_MODEL) {
1485 if (ntohs(mpa_v2_params->ord) &
1486 MPA_V2_RDMA_WRITE_RTR)
1487 ep->mpa_attr.p2p_type =
1488 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1489 else if (ntohs(mpa_v2_params->ord) &
1490 MPA_V2_RDMA_READ_RTR)
1491 ep->mpa_attr.p2p_type =
1492 FW_RI_INIT_P2PTYPE_READ_REQ;
1493 }
1494 }
1495 } else if (mpa->revision == 1)
1496 if (peer2peer)
1497 ep->mpa_attr.p2p_type = p2p_type;
1498
1499 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1500 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1501 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1502 ep->mpa_attr.recv_marker_enabled,
1503 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1504 ep->mpa_attr.p2p_type, p2p_type);
1505
1506 /*
1507 * If responder's RTR does not match with that of initiator, assign
1508 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1509 * generated when moving QP to RTS state.
1510 * A TERM message will be sent after QP has moved to RTS state
1511 */
1512 if ((ep->mpa_attr.version == 2) && peer2peer &&
1513 (ep->mpa_attr.p2p_type != p2p_type)) {
1514 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1515 rtr_mismatch = 1;
1516 }
1517
1518 attrs.mpa_attr = ep->mpa_attr;
1519 attrs.max_ird = ep->ird;
1520 attrs.max_ord = ep->ord;
1521 attrs.llp_stream_handle = ep;
1522 attrs.next_state = C4IW_QP_STATE_RTS;
1523
1524 mask = C4IW_QP_ATTR_NEXT_STATE |
1525 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1526 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1527
1528 /* bind QP and TID with INIT_WR */
1529 err = c4iw_modify_qp(ep->com.qp->rhp,
1530 ep->com.qp, mask, &attrs, 1);
1531 if (err)
1532 goto err;
1533
1534 /*
1535 * If responder's RTR requirement did not match with what initiator
1536 * supports, generate TERM message
1537 */
1538 if (rtr_mismatch) {
1539 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1540 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1541 attrs.ecode = MPA_NOMATCH_RTR;
1542 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1543 attrs.send_term = 1;
1544 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1545 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1546 err = -ENOMEM;
1547 disconnect = 1;
1548 goto out;
1549 }
1550
1551 /*
1552 * Generate TERM if initiator IRD is not sufficient for responder
1553 * provided ORD. Currently, we do the same behaviour even when
1554 * responder provided IRD is also not sufficient as regards to
1555 * initiator ORD.
1556 */
1557 if (insuff_ird) {
1558 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1559 __func__);
1560 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1561 attrs.ecode = MPA_INSUFF_IRD;
1562 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1563 attrs.send_term = 1;
1564 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1565 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1566 err = -ENOMEM;
1567 disconnect = 1;
1568 goto out;
1569 }
1570 goto out;
1571 err:
1572 __state_set(&ep->com, ABORTING);
1573 send_abort(ep, skb, GFP_KERNEL);
1574 out:
1575 connect_reply_upcall(ep, err);
1576 return disconnect;
1577 }
1578
1579 static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1580 {
1581 struct mpa_message *mpa;
1582 struct mpa_v2_conn_params *mpa_v2_params;
1583 u16 plen;
1584
1585 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1586
1587 /*
1588 * If we get more than the supported amount of private data
1589 * then we must fail this connection.
1590 */
1591 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1592 (void)stop_ep_timer(ep);
1593 abort_connection(ep, skb, GFP_KERNEL);
1594 return;
1595 }
1596
1597 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1598
1599 /*
1600 * Copy the new data into our accumulation buffer.
1601 */
1602 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1603 skb->len);
1604 ep->mpa_pkt_len += skb->len;
1605
1606 /*
1607 * If we don't even have the mpa message, then bail.
1608 * We'll continue process when more data arrives.
1609 */
1610 if (ep->mpa_pkt_len < sizeof(*mpa))
1611 return;
1612
1613 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1614 mpa = (struct mpa_message *) ep->mpa_pkt;
1615
1616 /*
1617 * Validate MPA Header.
1618 */
1619 if (mpa->revision > mpa_rev) {
1620 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1621 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1622 (void)stop_ep_timer(ep);
1623 abort_connection(ep, skb, GFP_KERNEL);
1624 return;
1625 }
1626
1627 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1628 (void)stop_ep_timer(ep);
1629 abort_connection(ep, skb, GFP_KERNEL);
1630 return;
1631 }
1632
1633 plen = ntohs(mpa->private_data_size);
1634
1635 /*
1636 * Fail if there's too much private data.
1637 */
1638 if (plen > MPA_MAX_PRIVATE_DATA) {
1639 (void)stop_ep_timer(ep);
1640 abort_connection(ep, skb, GFP_KERNEL);
1641 return;
1642 }
1643
1644 /*
1645 * If plen does not account for pkt size
1646 */
1647 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1648 (void)stop_ep_timer(ep);
1649 abort_connection(ep, skb, GFP_KERNEL);
1650 return;
1651 }
1652 ep->plen = (u8) plen;
1653
1654 /*
1655 * If we don't have all the pdata yet, then bail.
1656 */
1657 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1658 return;
1659
1660 /*
1661 * If we get here we have accumulated the entire mpa
1662 * start reply message including private data.
1663 */
1664 ep->mpa_attr.initiator = 0;
1665 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1666 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1667 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1668 ep->mpa_attr.version = mpa->revision;
1669 if (mpa->revision == 1)
1670 ep->tried_with_mpa_v1 = 1;
1671 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1672
1673 if (mpa->revision == 2) {
1674 ep->mpa_attr.enhanced_rdma_conn =
1675 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1676 if (ep->mpa_attr.enhanced_rdma_conn) {
1677 mpa_v2_params = (struct mpa_v2_conn_params *)
1678 (ep->mpa_pkt + sizeof(*mpa));
1679 ep->ird = ntohs(mpa_v2_params->ird) &
1680 MPA_V2_IRD_ORD_MASK;
1681 ep->ord = ntohs(mpa_v2_params->ord) &
1682 MPA_V2_IRD_ORD_MASK;
1683 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
1684 ep->ord);
1685 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1686 if (peer2peer) {
1687 if (ntohs(mpa_v2_params->ord) &
1688 MPA_V2_RDMA_WRITE_RTR)
1689 ep->mpa_attr.p2p_type =
1690 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1691 else if (ntohs(mpa_v2_params->ord) &
1692 MPA_V2_RDMA_READ_RTR)
1693 ep->mpa_attr.p2p_type =
1694 FW_RI_INIT_P2PTYPE_READ_REQ;
1695 }
1696 }
1697 } else if (mpa->revision == 1)
1698 if (peer2peer)
1699 ep->mpa_attr.p2p_type = p2p_type;
1700
1701 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1702 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1703 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1704 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1705 ep->mpa_attr.p2p_type);
1706
1707 /*
1708 * If the endpoint timer already expired, then we ignore
1709 * the start request. process_timeout() will abort
1710 * the connection.
1711 */
1712 if (!stop_ep_timer(ep)) {
1713 __state_set(&ep->com, MPA_REQ_RCVD);
1714
1715 /* drive upcall */
1716 mutex_lock_nested(&ep->parent_ep->com.mutex,
1717 SINGLE_DEPTH_NESTING);
1718 if (ep->parent_ep->com.state != DEAD) {
1719 if (connect_request_upcall(ep))
1720 abort_connection(ep, skb, GFP_KERNEL);
1721 } else {
1722 abort_connection(ep, skb, GFP_KERNEL);
1723 }
1724 mutex_unlock(&ep->parent_ep->com.mutex);
1725 }
1726 return;
1727 }
1728
1729 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1730 {
1731 struct c4iw_ep *ep;
1732 struct cpl_rx_data *hdr = cplhdr(skb);
1733 unsigned int dlen = ntohs(hdr->len);
1734 unsigned int tid = GET_TID(hdr);
1735 struct tid_info *t = dev->rdev.lldi.tids;
1736 __u8 status = hdr->status;
1737 int disconnect = 0;
1738
1739 ep = lookup_tid(t, tid);
1740 if (!ep)
1741 return 0;
1742 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1743 skb_pull(skb, sizeof(*hdr));
1744 skb_trim(skb, dlen);
1745 mutex_lock(&ep->com.mutex);
1746
1747 /* update RX credits */
1748 update_rx_credits(ep, dlen);
1749
1750 switch (ep->com.state) {
1751 case MPA_REQ_SENT:
1752 ep->rcv_seq += dlen;
1753 disconnect = process_mpa_reply(ep, skb);
1754 break;
1755 case MPA_REQ_WAIT:
1756 ep->rcv_seq += dlen;
1757 process_mpa_request(ep, skb);
1758 break;
1759 case FPDU_MODE: {
1760 struct c4iw_qp_attributes attrs;
1761 BUG_ON(!ep->com.qp);
1762 if (status)
1763 pr_err("%s Unexpected streaming data." \
1764 " qpid %u ep %p state %d tid %u status %d\n",
1765 __func__, ep->com.qp->wq.sq.qid, ep,
1766 ep->com.state, ep->hwtid, status);
1767 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1768 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1769 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1770 disconnect = 1;
1771 break;
1772 }
1773 default:
1774 break;
1775 }
1776 mutex_unlock(&ep->com.mutex);
1777 if (disconnect)
1778 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1779 return 0;
1780 }
1781
1782 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1783 {
1784 struct c4iw_ep *ep;
1785 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1786 int release = 0;
1787 unsigned int tid = GET_TID(rpl);
1788 struct tid_info *t = dev->rdev.lldi.tids;
1789
1790 ep = lookup_tid(t, tid);
1791 if (!ep) {
1792 printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
1793 return 0;
1794 }
1795 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1796 mutex_lock(&ep->com.mutex);
1797 switch (ep->com.state) {
1798 case ABORTING:
1799 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1800 __state_set(&ep->com, DEAD);
1801 release = 1;
1802 break;
1803 default:
1804 printk(KERN_ERR "%s ep %p state %d\n",
1805 __func__, ep, ep->com.state);
1806 break;
1807 }
1808 mutex_unlock(&ep->com.mutex);
1809
1810 if (release)
1811 release_ep_resources(ep);
1812 return 0;
1813 }
1814
1815 static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1816 {
1817 struct sk_buff *skb;
1818 struct fw_ofld_connection_wr *req;
1819 unsigned int mtu_idx;
1820 int wscale;
1821 struct sockaddr_in *sin;
1822 int win;
1823
1824 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1825 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1826 memset(req, 0, sizeof(*req));
1827 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
1828 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
1829 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1830 ep->com.dev->rdev.lldi.ports[0],
1831 ep->l2t));
1832 sin = (struct sockaddr_in *)&ep->com.mapped_local_addr;
1833 req->le.lport = sin->sin_port;
1834 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1835 sin = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
1836 req->le.pport = sin->sin_port;
1837 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1838 req->tcb.t_state_to_astid =
1839 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
1840 FW_OFLD_CONNECTION_WR_ASTID_V(atid));
1841 req->tcb.cplrxdataack_cplpassacceptrpl =
1842 htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
1843 req->tcb.tx_max = (__force __be32) jiffies;
1844 req->tcb.rcv_adv = htons(1);
1845 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
1846 enable_tcp_timestamps,
1847 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
1848 wscale = compute_wscale(rcv_win);
1849
1850 /*
1851 * Specify the largest window that will fit in opt0. The
1852 * remainder will be specified in the rx_data_ack.
1853 */
1854 win = ep->rcv_win >> 10;
1855 if (win > RCV_BUFSIZ_M)
1856 win = RCV_BUFSIZ_M;
1857
1858 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
1859 (nocong ? NO_CONG_F : 0) |
1860 KEEP_ALIVE_F |
1861 DELACK_F |
1862 WND_SCALE_V(wscale) |
1863 MSS_IDX_V(mtu_idx) |
1864 L2T_IDX_V(ep->l2t->idx) |
1865 TX_CHAN_V(ep->tx_chan) |
1866 SMAC_SEL_V(ep->smac_idx) |
1867 DSCP_V(ep->tos) |
1868 ULP_MODE_V(ULP_MODE_TCPDDP) |
1869 RCV_BUFSIZ_V(win));
1870 req->tcb.opt2 = (__force __be32) (PACE_V(1) |
1871 TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
1872 RX_CHANNEL_V(0) |
1873 CCTRL_ECN_V(enable_ecn) |
1874 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
1875 if (enable_tcp_timestamps)
1876 req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
1877 if (enable_tcp_sack)
1878 req->tcb.opt2 |= (__force __be32)SACK_EN_F;
1879 if (wscale && enable_tcp_window_scaling)
1880 req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
1881 req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
1882 req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
1883 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
1884 set_bit(ACT_OFLD_CONN, &ep->com.history);
1885 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1886 }
1887
1888 /*
1889 * Return whether a failed active open has allocated a TID
1890 */
1891 static inline int act_open_has_tid(int status)
1892 {
1893 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1894 status != CPL_ERR_ARP_MISS;
1895 }
1896
1897 /* Returns whether a CPL status conveys negative advice.
1898 */
1899 static int is_neg_adv(unsigned int status)
1900 {
1901 return status == CPL_ERR_RTX_NEG_ADVICE ||
1902 status == CPL_ERR_PERSIST_NEG_ADVICE ||
1903 status == CPL_ERR_KEEPALV_NEG_ADVICE;
1904 }
1905
1906 static char *neg_adv_str(unsigned int status)
1907 {
1908 switch (status) {
1909 case CPL_ERR_RTX_NEG_ADVICE:
1910 return "Retransmit timeout";
1911 case CPL_ERR_PERSIST_NEG_ADVICE:
1912 return "Persist timeout";
1913 case CPL_ERR_KEEPALV_NEG_ADVICE:
1914 return "Keepalive timeout";
1915 default:
1916 return "Unknown";
1917 }
1918 }
1919
1920 static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
1921 {
1922 ep->snd_win = snd_win;
1923 ep->rcv_win = rcv_win;
1924 PDBG("%s snd_win %d rcv_win %d\n", __func__, ep->snd_win, ep->rcv_win);
1925 }
1926
1927 #define ACT_OPEN_RETRY_COUNT 2
1928
1929 static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
1930 struct dst_entry *dst, struct c4iw_dev *cdev,
1931 bool clear_mpa_v1, enum chip_type adapter_type)
1932 {
1933 struct neighbour *n;
1934 int err, step;
1935 struct net_device *pdev;
1936
1937 n = dst_neigh_lookup(dst, peer_ip);
1938 if (!n)
1939 return -ENODEV;
1940
1941 rcu_read_lock();
1942 err = -ENOMEM;
1943 if (n->dev->flags & IFF_LOOPBACK) {
1944 if (iptype == 4)
1945 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
1946 else if (IS_ENABLED(CONFIG_IPV6))
1947 for_each_netdev(&init_net, pdev) {
1948 if (ipv6_chk_addr(&init_net,
1949 (struct in6_addr *)peer_ip,
1950 pdev, 1))
1951 break;
1952 }
1953 else
1954 pdev = NULL;
1955
1956 if (!pdev) {
1957 err = -ENODEV;
1958 goto out;
1959 }
1960 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1961 n, pdev, 0);
1962 if (!ep->l2t)
1963 goto out;
1964 ep->mtu = pdev->mtu;
1965 ep->tx_chan = cxgb4_port_chan(pdev);
1966 ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
1967 cxgb4_port_viid(pdev));
1968 step = cdev->rdev.lldi.ntxq /
1969 cdev->rdev.lldi.nchan;
1970 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1971 step = cdev->rdev.lldi.nrxq /
1972 cdev->rdev.lldi.nchan;
1973 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1974 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1975 cxgb4_port_idx(pdev) * step];
1976 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
1977 dev_put(pdev);
1978 } else {
1979 pdev = get_real_dev(n->dev);
1980 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1981 n, pdev, 0);
1982 if (!ep->l2t)
1983 goto out;
1984 ep->mtu = dst_mtu(dst);
1985 ep->tx_chan = cxgb4_port_chan(pdev);
1986 ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
1987 cxgb4_port_viid(pdev));
1988 step = cdev->rdev.lldi.ntxq /
1989 cdev->rdev.lldi.nchan;
1990 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1991 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1992 step = cdev->rdev.lldi.nrxq /
1993 cdev->rdev.lldi.nchan;
1994 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1995 cxgb4_port_idx(pdev) * step];
1996 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
1997
1998 if (clear_mpa_v1) {
1999 ep->retry_with_mpa_v1 = 0;
2000 ep->tried_with_mpa_v1 = 0;
2001 }
2002 }
2003 err = 0;
2004 out:
2005 rcu_read_unlock();
2006
2007 neigh_release(n);
2008
2009 return err;
2010 }
2011
2012 static int c4iw_reconnect(struct c4iw_ep *ep)
2013 {
2014 int err = 0;
2015 struct sockaddr_in *laddr = (struct sockaddr_in *)
2016 &ep->com.cm_id->local_addr;
2017 struct sockaddr_in *raddr = (struct sockaddr_in *)
2018 &ep->com.cm_id->remote_addr;
2019 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
2020 &ep->com.cm_id->local_addr;
2021 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
2022 &ep->com.cm_id->remote_addr;
2023 int iptype;
2024 __u8 *ra;
2025
2026 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
2027 init_timer(&ep->timer);
2028
2029 /*
2030 * Allocate an active TID to initiate a TCP connection.
2031 */
2032 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
2033 if (ep->atid == -1) {
2034 pr_err("%s - cannot alloc atid.\n", __func__);
2035 err = -ENOMEM;
2036 goto fail2;
2037 }
2038 insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
2039
2040 /* find a route */
2041 if (ep->com.cm_id->local_addr.ss_family == AF_INET) {
2042 ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
2043 raddr->sin_addr.s_addr, laddr->sin_port,
2044 raddr->sin_port, 0);
2045 iptype = 4;
2046 ra = (__u8 *)&raddr->sin_addr;
2047 } else {
2048 ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
2049 raddr6->sin6_addr.s6_addr,
2050 laddr6->sin6_port, raddr6->sin6_port, 0,
2051 raddr6->sin6_scope_id);
2052 iptype = 6;
2053 ra = (__u8 *)&raddr6->sin6_addr;
2054 }
2055 if (!ep->dst) {
2056 pr_err("%s - cannot find route.\n", __func__);
2057 err = -EHOSTUNREACH;
2058 goto fail3;
2059 }
2060 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false,
2061 ep->com.dev->rdev.lldi.adapter_type);
2062 if (err) {
2063 pr_err("%s - cannot alloc l2e.\n", __func__);
2064 goto fail4;
2065 }
2066
2067 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2068 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2069 ep->l2t->idx);
2070
2071 state_set(&ep->com, CONNECTING);
2072 ep->tos = 0;
2073
2074 /* send connect request to rnic */
2075 err = send_connect(ep);
2076 if (!err)
2077 goto out;
2078
2079 cxgb4_l2t_release(ep->l2t);
2080 fail4:
2081 dst_release(ep->dst);
2082 fail3:
2083 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
2084 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2085 fail2:
2086 /*
2087 * remember to send notification to upper layer.
2088 * We are in here so the upper layer is not aware that this is
2089 * re-connect attempt and so, upper layer is still waiting for
2090 * response of 1st connect request.
2091 */
2092 connect_reply_upcall(ep, -ECONNRESET);
2093 c4iw_put_ep(&ep->com);
2094 out:
2095 return err;
2096 }
2097
2098 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2099 {
2100 struct c4iw_ep *ep;
2101 struct cpl_act_open_rpl *rpl = cplhdr(skb);
2102 unsigned int atid = TID_TID_G(AOPEN_ATID_G(
2103 ntohl(rpl->atid_status)));
2104 struct tid_info *t = dev->rdev.lldi.tids;
2105 int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
2106 struct sockaddr_in *la;
2107 struct sockaddr_in *ra;
2108 struct sockaddr_in6 *la6;
2109 struct sockaddr_in6 *ra6;
2110
2111 ep = lookup_atid(t, atid);
2112 la = (struct sockaddr_in *)&ep->com.mapped_local_addr;
2113 ra = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
2114 la6 = (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
2115 ra6 = (struct sockaddr_in6 *)&ep->com.mapped_remote_addr;
2116
2117 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
2118 status, status2errno(status));
2119
2120 if (is_neg_adv(status)) {
2121 PDBG("%s Connection problems for atid %u status %u (%s)\n",
2122 __func__, atid, status, neg_adv_str(status));
2123 ep->stats.connect_neg_adv++;
2124 mutex_lock(&dev->rdev.stats.lock);
2125 dev->rdev.stats.neg_adv++;
2126 mutex_unlock(&dev->rdev.stats.lock);
2127 return 0;
2128 }
2129
2130 set_bit(ACT_OPEN_RPL, &ep->com.history);
2131
2132 /*
2133 * Log interesting failures.
2134 */
2135 switch (status) {
2136 case CPL_ERR_CONN_RESET:
2137 case CPL_ERR_CONN_TIMEDOUT:
2138 break;
2139 case CPL_ERR_TCAM_FULL:
2140 mutex_lock(&dev->rdev.stats.lock);
2141 dev->rdev.stats.tcam_full++;
2142 mutex_unlock(&dev->rdev.stats.lock);
2143 if (ep->com.local_addr.ss_family == AF_INET &&
2144 dev->rdev.lldi.enable_fw_ofld_conn) {
2145 send_fw_act_open_req(ep,
2146 TID_TID_G(AOPEN_ATID_G(
2147 ntohl(rpl->atid_status))));
2148 return 0;
2149 }
2150 break;
2151 case CPL_ERR_CONN_EXIST:
2152 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
2153 set_bit(ACT_RETRY_INUSE, &ep->com.history);
2154 if (ep->com.remote_addr.ss_family == AF_INET6) {
2155 struct sockaddr_in6 *sin6 =
2156 (struct sockaddr_in6 *)
2157 &ep->com.mapped_local_addr;
2158 cxgb4_clip_release(
2159 ep->com.dev->rdev.lldi.ports[0],
2160 (const u32 *)
2161 &sin6->sin6_addr.s6_addr, 1);
2162 }
2163 remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
2164 atid);
2165 cxgb4_free_atid(t, atid);
2166 dst_release(ep->dst);
2167 cxgb4_l2t_release(ep->l2t);
2168 c4iw_reconnect(ep);
2169 return 0;
2170 }
2171 break;
2172 default:
2173 if (ep->com.local_addr.ss_family == AF_INET) {
2174 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
2175 atid, status, status2errno(status),
2176 &la->sin_addr.s_addr, ntohs(la->sin_port),
2177 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
2178 } else {
2179 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
2180 atid, status, status2errno(status),
2181 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
2182 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
2183 }
2184 break;
2185 }
2186
2187 connect_reply_upcall(ep, status2errno(status));
2188 state_set(&ep->com, DEAD);
2189
2190 if (ep->com.remote_addr.ss_family == AF_INET6) {
2191 struct sockaddr_in6 *sin6 =
2192 (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
2193 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
2194 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2195 }
2196 if (status && act_open_has_tid(status))
2197 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
2198
2199 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
2200 cxgb4_free_atid(t, atid);
2201 dst_release(ep->dst);
2202 cxgb4_l2t_release(ep->l2t);
2203 c4iw_put_ep(&ep->com);
2204
2205 return 0;
2206 }
2207
2208 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2209 {
2210 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
2211 struct tid_info *t = dev->rdev.lldi.tids;
2212 unsigned int stid = GET_TID(rpl);
2213 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
2214
2215 if (!ep) {
2216 PDBG("%s stid %d lookup failure!\n", __func__, stid);
2217 goto out;
2218 }
2219 PDBG("%s ep %p status %d error %d\n", __func__, ep,
2220 rpl->status, status2errno(rpl->status));
2221 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2222
2223 out:
2224 return 0;
2225 }
2226
2227 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2228 {
2229 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
2230 struct tid_info *t = dev->rdev.lldi.tids;
2231 unsigned int stid = GET_TID(rpl);
2232 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
2233
2234 PDBG("%s ep %p\n", __func__, ep);
2235 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2236 return 0;
2237 }
2238
2239 static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
2240 struct cpl_pass_accept_req *req)
2241 {
2242 struct cpl_pass_accept_rpl *rpl;
2243 unsigned int mtu_idx;
2244 u64 opt0;
2245 u32 opt2;
2246 int wscale;
2247 struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
2248 int win;
2249 enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
2250
2251 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2252 BUG_ON(skb_cloned(skb));
2253
2254 skb_get(skb);
2255 rpl = cplhdr(skb);
2256 if (!is_t4(adapter_type)) {
2257 skb_trim(skb, roundup(sizeof(*rpl5), 16));
2258 rpl5 = (void *)rpl;
2259 INIT_TP_WR(rpl5, ep->hwtid);
2260 } else {
2261 skb_trim(skb, sizeof(*rpl));
2262 INIT_TP_WR(rpl, ep->hwtid);
2263 }
2264 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
2265 ep->hwtid));
2266
2267 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
2268 enable_tcp_timestamps && req->tcpopt.tstamp,
2269 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
2270 wscale = compute_wscale(rcv_win);
2271
2272 /*
2273 * Specify the largest window that will fit in opt0. The
2274 * remainder will be specified in the rx_data_ack.
2275 */
2276 win = ep->rcv_win >> 10;
2277 if (win > RCV_BUFSIZ_M)
2278 win = RCV_BUFSIZ_M;
2279 opt0 = (nocong ? NO_CONG_F : 0) |
2280 KEEP_ALIVE_F |
2281 DELACK_F |
2282 WND_SCALE_V(wscale) |
2283 MSS_IDX_V(mtu_idx) |
2284 L2T_IDX_V(ep->l2t->idx) |
2285 TX_CHAN_V(ep->tx_chan) |
2286 SMAC_SEL_V(ep->smac_idx) |
2287 DSCP_V(ep->tos >> 2) |
2288 ULP_MODE_V(ULP_MODE_TCPDDP) |
2289 RCV_BUFSIZ_V(win);
2290 opt2 = RX_CHANNEL_V(0) |
2291 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
2292
2293 if (enable_tcp_timestamps && req->tcpopt.tstamp)
2294 opt2 |= TSTAMPS_EN_F;
2295 if (enable_tcp_sack && req->tcpopt.sack)
2296 opt2 |= SACK_EN_F;
2297 if (wscale && enable_tcp_window_scaling)
2298 opt2 |= WND_SCALE_EN_F;
2299 if (enable_ecn) {
2300 const struct tcphdr *tcph;
2301 u32 hlen = ntohl(req->hdr_len);
2302
2303 if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5)
2304 tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
2305 IP_HDR_LEN_G(hlen);
2306 else
2307 tcph = (const void *)(req + 1) +
2308 T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen);
2309 if (tcph->ece && tcph->cwr)
2310 opt2 |= CCTRL_ECN_V(1);
2311 }
2312 if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
2313 u32 isn = (prandom_u32() & ~7UL) - 1;
2314 opt2 |= T5_OPT_2_VALID_F;
2315 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
2316 opt2 |= T5_ISS_F;
2317 rpl5 = (void *)rpl;
2318 memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16));
2319 if (peer2peer)
2320 isn += 4;
2321 rpl5->iss = cpu_to_be32(isn);
2322 PDBG("%s iss %u\n", __func__, be32_to_cpu(rpl5->iss));
2323 }
2324
2325 rpl->opt0 = cpu_to_be64(opt0);
2326 rpl->opt2 = cpu_to_be32(opt2);
2327 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2328 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
2329 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2330
2331 return;
2332 }
2333
2334 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2335 {
2336 PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
2337 BUG_ON(skb_cloned(skb));
2338 skb_trim(skb, sizeof(struct cpl_tid_release));
2339 release_tid(&dev->rdev, hwtid, skb);
2340 return;
2341 }
2342
2343 static void get_4tuple(struct cpl_pass_accept_req *req, enum chip_type type,
2344 int *iptype, __u8 *local_ip, __u8 *peer_ip,
2345 __be16 *local_port, __be16 *peer_port)
2346 {
2347 int eth_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ?
2348 ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len)) :
2349 T6_ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len));
2350 int ip_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ?
2351 IP_HDR_LEN_G(be32_to_cpu(req->hdr_len)) :
2352 T6_IP_HDR_LEN_G(be32_to_cpu(req->hdr_len));
2353 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
2354 struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
2355 struct tcphdr *tcp = (struct tcphdr *)
2356 ((u8 *)(req + 1) + eth_len + ip_len);
2357
2358 if (ip->version == 4) {
2359 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
2360 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
2361 ntohs(tcp->dest));
2362 *iptype = 4;
2363 memcpy(peer_ip, &ip->saddr, 4);
2364 memcpy(local_ip, &ip->daddr, 4);
2365 } else {
2366 PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
2367 ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
2368 ntohs(tcp->dest));
2369 *iptype = 6;
2370 memcpy(peer_ip, ip6->saddr.s6_addr, 16);
2371 memcpy(local_ip, ip6->daddr.s6_addr, 16);
2372 }
2373 *peer_port = tcp->source;
2374 *local_port = tcp->dest;
2375
2376 return;
2377 }
2378
2379 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2380 {
2381 struct c4iw_ep *child_ep = NULL, *parent_ep;
2382 struct cpl_pass_accept_req *req = cplhdr(skb);
2383 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
2384 struct tid_info *t = dev->rdev.lldi.tids;
2385 unsigned int hwtid = GET_TID(req);
2386 struct dst_entry *dst;
2387 __u8 local_ip[16], peer_ip[16];
2388 __be16 local_port, peer_port;
2389 struct sockaddr_in6 *sin6;
2390 int err;
2391 u16 peer_mss = ntohs(req->tcpopt.mss);
2392 int iptype;
2393 unsigned short hdrs;
2394
2395 parent_ep = lookup_stid(t, stid);
2396 if (!parent_ep) {
2397 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
2398 goto reject;
2399 }
2400
2401 if (state_read(&parent_ep->com) != LISTEN) {
2402 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
2403 __func__);
2404 goto reject;
2405 }
2406
2407 get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type, &iptype,
2408 local_ip, peer_ip, &local_port, &peer_port);
2409
2410 /* Find output route */
2411 if (iptype == 4) {
2412 PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2413 , __func__, parent_ep, hwtid,
2414 local_ip, peer_ip, ntohs(local_port),
2415 ntohs(peer_port), peer_mss);
2416 dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
2417 local_port, peer_port,
2418 PASS_OPEN_TOS_G(ntohl(req->tos_stid)));
2419 } else {
2420 PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2421 , __func__, parent_ep, hwtid,
2422 local_ip, peer_ip, ntohs(local_port),
2423 ntohs(peer_port), peer_mss);
2424 dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
2425 PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
2426 ((struct sockaddr_in6 *)
2427 &parent_ep->com.local_addr)->sin6_scope_id);
2428 }
2429 if (!dst) {
2430 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
2431 __func__);
2432 goto reject;
2433 }
2434
2435 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2436 if (!child_ep) {
2437 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
2438 __func__);
2439 dst_release(dst);
2440 goto reject;
2441 }
2442
2443 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false,
2444 parent_ep->com.dev->rdev.lldi.adapter_type);
2445 if (err) {
2446 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
2447 __func__);
2448 dst_release(dst);
2449 kfree(child_ep);
2450 goto reject;
2451 }
2452
2453 hdrs = sizeof(struct iphdr) + sizeof(struct tcphdr) +
2454 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
2455 if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
2456 child_ep->mtu = peer_mss + hdrs;
2457
2458 state_set(&child_ep->com, CONNECTING);
2459 child_ep->com.dev = dev;
2460 child_ep->com.cm_id = NULL;
2461
2462 /*
2463 * The mapped_local and mapped_remote addresses get setup with
2464 * the actual 4-tuple. The local address will be based on the
2465 * actual local address of the connection, but on the port number
2466 * of the parent listening endpoint. The remote address is
2467 * setup based on a query to the IWPM since we don't know what it
2468 * originally was before mapping. If no mapping was done, then
2469 * mapped_remote == remote, and mapped_local == local.
2470 */
2471 if (iptype == 4) {
2472 struct sockaddr_in *sin = (struct sockaddr_in *)
2473 &child_ep->com.mapped_local_addr;
2474
2475 sin->sin_family = PF_INET;
2476 sin->sin_port = local_port;
2477 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2478
2479 sin = (struct sockaddr_in *)&child_ep->com.local_addr;
2480 sin->sin_family = PF_INET;
2481 sin->sin_port = ((struct sockaddr_in *)
2482 &parent_ep->com.local_addr)->sin_port;
2483 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2484
2485 sin = (struct sockaddr_in *)&child_ep->com.mapped_remote_addr;
2486 sin->sin_family = PF_INET;
2487 sin->sin_port = peer_port;
2488 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2489 } else {
2490 sin6 = (struct sockaddr_in6 *)&child_ep->com.mapped_local_addr;
2491 sin6->sin6_family = PF_INET6;
2492 sin6->sin6_port = local_port;
2493 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2494
2495 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2496 sin6->sin6_family = PF_INET6;
2497 sin6->sin6_port = ((struct sockaddr_in6 *)
2498 &parent_ep->com.local_addr)->sin6_port;
2499 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2500
2501 sin6 = (struct sockaddr_in6 *)&child_ep->com.mapped_remote_addr;
2502 sin6->sin6_family = PF_INET6;
2503 sin6->sin6_port = peer_port;
2504 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2505 }
2506 memcpy(&child_ep->com.remote_addr, &child_ep->com.mapped_remote_addr,
2507 sizeof(child_ep->com.remote_addr));
2508 get_remote_addr(parent_ep, child_ep);
2509
2510 c4iw_get_ep(&parent_ep->com);
2511 child_ep->parent_ep = parent_ep;
2512 child_ep->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
2513 child_ep->dst = dst;
2514 child_ep->hwtid = hwtid;
2515
2516 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
2517 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2518
2519 init_timer(&child_ep->timer);
2520 cxgb4_insert_tid(t, child_ep, hwtid);
2521 insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
2522 accept_cr(child_ep, skb, req);
2523 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2524 if (iptype == 6) {
2525 sin6 = (struct sockaddr_in6 *)&child_ep->com.mapped_local_addr;
2526 cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0],
2527 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
2528 }
2529 goto out;
2530 reject:
2531 reject_cr(dev, hwtid, skb);
2532 out:
2533 return 0;
2534 }
2535
2536 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2537 {
2538 struct c4iw_ep *ep;
2539 struct cpl_pass_establish *req = cplhdr(skb);
2540 struct tid_info *t = dev->rdev.lldi.tids;
2541 unsigned int tid = GET_TID(req);
2542
2543 ep = lookup_tid(t, tid);
2544 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2545 ep->snd_seq = be32_to_cpu(req->snd_isn);
2546 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2547
2548 PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
2549 ntohs(req->tcp_opt));
2550
2551 set_emss(ep, ntohs(req->tcp_opt));
2552
2553 dst_confirm(ep->dst);
2554 state_set(&ep->com, MPA_REQ_WAIT);
2555 start_ep_timer(ep);
2556 send_flowc(ep, skb);
2557 set_bit(PASS_ESTAB, &ep->com.history);
2558
2559 return 0;
2560 }
2561
2562 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2563 {
2564 struct cpl_peer_close *hdr = cplhdr(skb);
2565 struct c4iw_ep *ep;
2566 struct c4iw_qp_attributes attrs;
2567 int disconnect = 1;
2568 int release = 0;
2569 struct tid_info *t = dev->rdev.lldi.tids;
2570 unsigned int tid = GET_TID(hdr);
2571 int ret;
2572
2573 ep = lookup_tid(t, tid);
2574 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2575 dst_confirm(ep->dst);
2576
2577 set_bit(PEER_CLOSE, &ep->com.history);
2578 mutex_lock(&ep->com.mutex);
2579 switch (ep->com.state) {
2580 case MPA_REQ_WAIT:
2581 __state_set(&ep->com, CLOSING);
2582 break;
2583 case MPA_REQ_SENT:
2584 __state_set(&ep->com, CLOSING);
2585 connect_reply_upcall(ep, -ECONNRESET);
2586 break;
2587 case MPA_REQ_RCVD:
2588
2589 /*
2590 * We're gonna mark this puppy DEAD, but keep
2591 * the reference on it until the ULP accepts or
2592 * rejects the CR. Also wake up anyone waiting
2593 * in rdma connection migration (see c4iw_accept_cr()).
2594 */
2595 __state_set(&ep->com, CLOSING);
2596 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2597 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2598 break;
2599 case MPA_REP_SENT:
2600 __state_set(&ep->com, CLOSING);
2601 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2602 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2603 break;
2604 case FPDU_MODE:
2605 start_ep_timer(ep);
2606 __state_set(&ep->com, CLOSING);
2607 attrs.next_state = C4IW_QP_STATE_CLOSING;
2608 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2609 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2610 if (ret != -ECONNRESET) {
2611 peer_close_upcall(ep);
2612 disconnect = 1;
2613 }
2614 break;
2615 case ABORTING:
2616 disconnect = 0;
2617 break;
2618 case CLOSING:
2619 __state_set(&ep->com, MORIBUND);
2620 disconnect = 0;
2621 break;
2622 case MORIBUND:
2623 (void)stop_ep_timer(ep);
2624 if (ep->com.cm_id && ep->com.qp) {
2625 attrs.next_state = C4IW_QP_STATE_IDLE;
2626 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2627 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2628 }
2629 close_complete_upcall(ep, 0);
2630 __state_set(&ep->com, DEAD);
2631 release = 1;
2632 disconnect = 0;
2633 break;
2634 case DEAD:
2635 disconnect = 0;
2636 break;
2637 default:
2638 BUG_ON(1);
2639 }
2640 mutex_unlock(&ep->com.mutex);
2641 if (disconnect)
2642 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2643 if (release)
2644 release_ep_resources(ep);
2645 return 0;
2646 }
2647
2648 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2649 {
2650 struct cpl_abort_req_rss *req = cplhdr(skb);
2651 struct c4iw_ep *ep;
2652 struct cpl_abort_rpl *rpl;
2653 struct sk_buff *rpl_skb;
2654 struct c4iw_qp_attributes attrs;
2655 int ret;
2656 int release = 0;
2657 struct tid_info *t = dev->rdev.lldi.tids;
2658 unsigned int tid = GET_TID(req);
2659
2660 ep = lookup_tid(t, tid);
2661 if (is_neg_adv(req->status)) {
2662 PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
2663 __func__, ep->hwtid, req->status,
2664 neg_adv_str(req->status));
2665 ep->stats.abort_neg_adv++;
2666 mutex_lock(&dev->rdev.stats.lock);
2667 dev->rdev.stats.neg_adv++;
2668 mutex_unlock(&dev->rdev.stats.lock);
2669 return 0;
2670 }
2671 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2672 ep->com.state);
2673 set_bit(PEER_ABORT, &ep->com.history);
2674
2675 /*
2676 * Wake up any threads in rdma_init() or rdma_fini().
2677 * However, this is not needed if com state is just
2678 * MPA_REQ_SENT
2679 */
2680 if (ep->com.state != MPA_REQ_SENT)
2681 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2682
2683 mutex_lock(&ep->com.mutex);
2684 switch (ep->com.state) {
2685 case CONNECTING:
2686 break;
2687 case MPA_REQ_WAIT:
2688 (void)stop_ep_timer(ep);
2689 break;
2690 case MPA_REQ_SENT:
2691 (void)stop_ep_timer(ep);
2692 if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
2693 connect_reply_upcall(ep, -ECONNRESET);
2694 else {
2695 /*
2696 * we just don't send notification upwards because we
2697 * want to retry with mpa_v1 without upper layers even
2698 * knowing it.
2699 *
2700 * do some housekeeping so as to re-initiate the
2701 * connection
2702 */
2703 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
2704 mpa_rev);
2705 ep->retry_with_mpa_v1 = 1;
2706 }
2707 break;
2708 case MPA_REP_SENT:
2709 break;
2710 case MPA_REQ_RCVD:
2711 break;
2712 case MORIBUND:
2713 case CLOSING:
2714 stop_ep_timer(ep);
2715 /*FALLTHROUGH*/
2716 case FPDU_MODE:
2717 if (ep->com.cm_id && ep->com.qp) {
2718 attrs.next_state = C4IW_QP_STATE_ERROR;
2719 ret = c4iw_modify_qp(ep->com.qp->rhp,
2720 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2721 &attrs, 1);
2722 if (ret)
2723 printk(KERN_ERR MOD
2724 "%s - qp <- error failed!\n",
2725 __func__);
2726 }
2727 peer_abort_upcall(ep);
2728 break;
2729 case ABORTING:
2730 break;
2731 case DEAD:
2732 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2733 mutex_unlock(&ep->com.mutex);
2734 return 0;
2735 default:
2736 BUG_ON(1);
2737 break;
2738 }
2739 dst_confirm(ep->dst);
2740 if (ep->com.state != ABORTING) {
2741 __state_set(&ep->com, DEAD);
2742 /* we don't release if we want to retry with mpa_v1 */
2743 if (!ep->retry_with_mpa_v1)
2744 release = 1;
2745 }
2746 mutex_unlock(&ep->com.mutex);
2747
2748 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2749 if (!rpl_skb) {
2750 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
2751 __func__);
2752 release = 1;
2753 goto out;
2754 }
2755 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2756 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2757 INIT_TP_WR(rpl, ep->hwtid);
2758 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2759 rpl->cmd = CPL_ABORT_NO_RST;
2760 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2761 out:
2762 if (release)
2763 release_ep_resources(ep);
2764 else if (ep->retry_with_mpa_v1) {
2765 if (ep->com.remote_addr.ss_family == AF_INET6) {
2766 struct sockaddr_in6 *sin6 =
2767 (struct sockaddr_in6 *)
2768 &ep->com.mapped_local_addr;
2769 cxgb4_clip_release(
2770 ep->com.dev->rdev.lldi.ports[0],
2771 (const u32 *)&sin6->sin6_addr.s6_addr,
2772 1);
2773 }
2774 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
2775 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2776 dst_release(ep->dst);
2777 cxgb4_l2t_release(ep->l2t);
2778 c4iw_reconnect(ep);
2779 }
2780
2781 return 0;
2782 }
2783
2784 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2785 {
2786 struct c4iw_ep *ep;
2787 struct c4iw_qp_attributes attrs;
2788 struct cpl_close_con_rpl *rpl = cplhdr(skb);
2789 int release = 0;
2790 struct tid_info *t = dev->rdev.lldi.tids;
2791 unsigned int tid = GET_TID(rpl);
2792
2793 ep = lookup_tid(t, tid);
2794
2795 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2796 BUG_ON(!ep);
2797
2798 /* The cm_id may be null if we failed to connect */
2799 mutex_lock(&ep->com.mutex);
2800 switch (ep->com.state) {
2801 case CLOSING:
2802 __state_set(&ep->com, MORIBUND);
2803 break;
2804 case MORIBUND:
2805 (void)stop_ep_timer(ep);
2806 if ((ep->com.cm_id) && (ep->com.qp)) {
2807 attrs.next_state = C4IW_QP_STATE_IDLE;
2808 c4iw_modify_qp(ep->com.qp->rhp,
2809 ep->com.qp,
2810 C4IW_QP_ATTR_NEXT_STATE,
2811 &attrs, 1);
2812 }
2813 close_complete_upcall(ep, 0);
2814 __state_set(&ep->com, DEAD);
2815 release = 1;
2816 break;
2817 case ABORTING:
2818 case DEAD:
2819 break;
2820 default:
2821 BUG_ON(1);
2822 break;
2823 }
2824 mutex_unlock(&ep->com.mutex);
2825 if (release)
2826 release_ep_resources(ep);
2827 return 0;
2828 }
2829
2830 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2831 {
2832 struct cpl_rdma_terminate *rpl = cplhdr(skb);
2833 struct tid_info *t = dev->rdev.lldi.tids;
2834 unsigned int tid = GET_TID(rpl);
2835 struct c4iw_ep *ep;
2836 struct c4iw_qp_attributes attrs;
2837
2838 ep = lookup_tid(t, tid);
2839 BUG_ON(!ep);
2840
2841 if (ep && ep->com.qp) {
2842 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2843 ep->com.qp->wq.sq.qid);
2844 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2845 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2846 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2847 } else
2848 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2849
2850 return 0;
2851 }
2852
2853 /*
2854 * Upcall from the adapter indicating data has been transmitted.
2855 * For us its just the single MPA request or reply. We can now free
2856 * the skb holding the mpa message.
2857 */
2858 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2859 {
2860 struct c4iw_ep *ep;
2861 struct cpl_fw4_ack *hdr = cplhdr(skb);
2862 u8 credits = hdr->credits;
2863 unsigned int tid = GET_TID(hdr);
2864 struct tid_info *t = dev->rdev.lldi.tids;
2865
2866
2867 ep = lookup_tid(t, tid);
2868 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
2869 if (credits == 0) {
2870 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
2871 __func__, ep, ep->hwtid, state_read(&ep->com));
2872 return 0;
2873 }
2874
2875 dst_confirm(ep->dst);
2876 if (ep->mpa_skb) {
2877 PDBG("%s last streaming msg ack ep %p tid %u state %u "
2878 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
2879 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
2880 kfree_skb(ep->mpa_skb);
2881 ep->mpa_skb = NULL;
2882 }
2883 return 0;
2884 }
2885
2886 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2887 {
2888 int err = 0;
2889 int disconnect = 0;
2890 struct c4iw_ep *ep = to_ep(cm_id);
2891 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2892
2893 mutex_lock(&ep->com.mutex);
2894 if (ep->com.state == DEAD) {
2895 mutex_unlock(&ep->com.mutex);
2896 c4iw_put_ep(&ep->com);
2897 return -ECONNRESET;
2898 }
2899 set_bit(ULP_REJECT, &ep->com.history);
2900 BUG_ON(ep->com.state != MPA_REQ_RCVD);
2901 if (mpa_rev == 0)
2902 abort_connection(ep, NULL, GFP_KERNEL);
2903 else {
2904 err = send_mpa_reject(ep, pdata, pdata_len);
2905 disconnect = 1;
2906 }
2907 mutex_unlock(&ep->com.mutex);
2908 if (disconnect)
2909 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2910 c4iw_put_ep(&ep->com);
2911 return 0;
2912 }
2913
2914 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2915 {
2916 int err;
2917 struct c4iw_qp_attributes attrs;
2918 enum c4iw_qp_attr_mask mask;
2919 struct c4iw_ep *ep = to_ep(cm_id);
2920 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2921 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2922
2923 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2924
2925 mutex_lock(&ep->com.mutex);
2926 if (ep->com.state == DEAD) {
2927 err = -ECONNRESET;
2928 goto err;
2929 }
2930
2931 BUG_ON(ep->com.state != MPA_REQ_RCVD);
2932 BUG_ON(!qp);
2933
2934 set_bit(ULP_ACCEPT, &ep->com.history);
2935 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
2936 (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
2937 abort_connection(ep, NULL, GFP_KERNEL);
2938 err = -EINVAL;
2939 goto err;
2940 }
2941
2942 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2943 if (conn_param->ord > ep->ird) {
2944 if (RELAXED_IRD_NEGOTIATION) {
2945 ep->ord = ep->ird;
2946 } else {
2947 ep->ird = conn_param->ird;
2948 ep->ord = conn_param->ord;
2949 send_mpa_reject(ep, conn_param->private_data,
2950 conn_param->private_data_len);
2951 abort_connection(ep, NULL, GFP_KERNEL);
2952 err = -ENOMEM;
2953 goto err;
2954 }
2955 }
2956 if (conn_param->ird < ep->ord) {
2957 if (RELAXED_IRD_NEGOTIATION &&
2958 ep->ord <= h->rdev.lldi.max_ordird_qp) {
2959 conn_param->ird = ep->ord;
2960 } else {
2961 abort_connection(ep, NULL, GFP_KERNEL);
2962 err = -ENOMEM;
2963 goto err;
2964 }
2965 }
2966 }
2967 ep->ird = conn_param->ird;
2968 ep->ord = conn_param->ord;
2969
2970 if (ep->mpa_attr.version == 1) {
2971 if (peer2peer && ep->ird == 0)
2972 ep->ird = 1;
2973 } else {
2974 if (peer2peer &&
2975 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
2976 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
2977 ep->ird = 1;
2978 }
2979
2980 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
2981
2982 cm_id->add_ref(cm_id);
2983 ep->com.cm_id = cm_id;
2984 ep->com.qp = qp;
2985 ref_qp(ep);
2986
2987 /* bind QP to EP and move to RTS */
2988 attrs.mpa_attr = ep->mpa_attr;
2989 attrs.max_ird = ep->ird;
2990 attrs.max_ord = ep->ord;
2991 attrs.llp_stream_handle = ep;
2992 attrs.next_state = C4IW_QP_STATE_RTS;
2993
2994 /* bind QP and TID with INIT_WR */
2995 mask = C4IW_QP_ATTR_NEXT_STATE |
2996 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2997 C4IW_QP_ATTR_MPA_ATTR |
2998 C4IW_QP_ATTR_MAX_IRD |
2999 C4IW_QP_ATTR_MAX_ORD;
3000
3001 err = c4iw_modify_qp(ep->com.qp->rhp,
3002 ep->com.qp, mask, &attrs, 1);
3003 if (err)
3004 goto err1;
3005 err = send_mpa_reply(ep, conn_param->private_data,
3006 conn_param->private_data_len);
3007 if (err)
3008 goto err1;
3009
3010 __state_set(&ep->com, FPDU_MODE);
3011 established_upcall(ep);
3012 mutex_unlock(&ep->com.mutex);
3013 c4iw_put_ep(&ep->com);
3014 return 0;
3015 err1:
3016 ep->com.cm_id = NULL;
3017 abort_connection(ep, NULL, GFP_KERNEL);
3018 cm_id->rem_ref(cm_id);
3019 err:
3020 mutex_unlock(&ep->com.mutex);
3021 c4iw_put_ep(&ep->com);
3022 return err;
3023 }
3024
3025 static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3026 {
3027 struct in_device *ind;
3028 int found = 0;
3029 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3030 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3031
3032 ind = in_dev_get(dev->rdev.lldi.ports[0]);
3033 if (!ind)
3034 return -EADDRNOTAVAIL;
3035 for_primary_ifa(ind) {
3036 laddr->sin_addr.s_addr = ifa->ifa_address;
3037 raddr->sin_addr.s_addr = ifa->ifa_address;
3038 found = 1;
3039 break;
3040 }
3041 endfor_ifa(ind);
3042 in_dev_put(ind);
3043 return found ? 0 : -EADDRNOTAVAIL;
3044 }
3045
3046 static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
3047 unsigned char banned_flags)
3048 {
3049 struct inet6_dev *idev;
3050 int err = -EADDRNOTAVAIL;
3051
3052 rcu_read_lock();
3053 idev = __in6_dev_get(dev);
3054 if (idev != NULL) {
3055 struct inet6_ifaddr *ifp;
3056
3057 read_lock_bh(&idev->lock);
3058 list_for_each_entry(ifp, &idev->addr_list, if_list) {
3059 if (ifp->scope == IFA_LINK &&
3060 !(ifp->flags & banned_flags)) {
3061 memcpy(addr, &ifp->addr, 16);
3062 err = 0;
3063 break;
3064 }
3065 }
3066 read_unlock_bh(&idev->lock);
3067 }
3068 rcu_read_unlock();
3069 return err;
3070 }
3071
3072 static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
3073 {
3074 struct in6_addr uninitialized_var(addr);
3075 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->local_addr;
3076 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->remote_addr;
3077
3078 if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
3079 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
3080 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
3081 return 0;
3082 }
3083 return -EADDRNOTAVAIL;
3084 }
3085
3086 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3087 {
3088 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3089 struct c4iw_ep *ep;
3090 int err = 0;
3091 struct sockaddr_in *laddr;
3092 struct sockaddr_in *raddr;
3093 struct sockaddr_in6 *laddr6;
3094 struct sockaddr_in6 *raddr6;
3095 struct iwpm_dev_data pm_reg_msg;
3096 struct iwpm_sa_data pm_msg;
3097 __u8 *ra;
3098 int iptype;
3099 int iwpm_err = 0;
3100
3101 if ((conn_param->ord > cur_max_read_depth(dev)) ||
3102 (conn_param->ird > cur_max_read_depth(dev))) {
3103 err = -EINVAL;
3104 goto out;
3105 }
3106 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3107 if (!ep) {
3108 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
3109 err = -ENOMEM;
3110 goto out;
3111 }
3112 init_timer(&ep->timer);
3113 ep->plen = conn_param->private_data_len;
3114 if (ep->plen)
3115 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
3116 conn_param->private_data, ep->plen);
3117 ep->ird = conn_param->ird;
3118 ep->ord = conn_param->ord;
3119
3120 if (peer2peer && ep->ord == 0)
3121 ep->ord = 1;
3122
3123 cm_id->add_ref(cm_id);
3124 ep->com.dev = dev;
3125 ep->com.cm_id = cm_id;
3126 ep->com.qp = get_qhp(dev, conn_param->qpn);
3127 if (!ep->com.qp) {
3128 PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
3129 err = -EINVAL;
3130 goto fail1;
3131 }
3132 ref_qp(ep);
3133 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
3134 ep->com.qp, cm_id);
3135
3136 /*
3137 * Allocate an active TID to initiate a TCP connection.
3138 */
3139 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
3140 if (ep->atid == -1) {
3141 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
3142 err = -ENOMEM;
3143 goto fail1;
3144 }
3145 insert_handle(dev, &dev->atid_idr, ep, ep->atid);
3146
3147 memcpy(&ep->com.local_addr, &cm_id->local_addr,
3148 sizeof(ep->com.local_addr));
3149 memcpy(&ep->com.remote_addr, &cm_id->remote_addr,
3150 sizeof(ep->com.remote_addr));
3151
3152 /* No port mapper available, go with the specified peer information */
3153 memcpy(&ep->com.mapped_local_addr, &cm_id->local_addr,
3154 sizeof(ep->com.mapped_local_addr));
3155 memcpy(&ep->com.mapped_remote_addr, &cm_id->remote_addr,
3156 sizeof(ep->com.mapped_remote_addr));
3157
3158 c4iw_form_reg_msg(dev, &pm_reg_msg);
3159 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_C4IW);
3160 if (iwpm_err) {
3161 PDBG("%s: Port Mapper reg pid fail (err = %d).\n",
3162 __func__, iwpm_err);
3163 }
3164 if (iwpm_valid_pid() && !iwpm_err) {
3165 c4iw_form_pm_msg(ep, &pm_msg);
3166 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_C4IW);
3167 if (iwpm_err)
3168 PDBG("%s: Port Mapper query fail (err = %d).\n",
3169 __func__, iwpm_err);
3170 else
3171 c4iw_record_pm_msg(ep, &pm_msg);
3172 }
3173 if (iwpm_create_mapinfo(&ep->com.local_addr,
3174 &ep->com.mapped_local_addr, RDMA_NL_C4IW)) {
3175 iwpm_remove_mapping(&ep->com.local_addr, RDMA_NL_C4IW);
3176 err = -ENOMEM;
3177 goto fail1;
3178 }
3179 print_addr(&ep->com, __func__, "add_query/create_mapinfo");
3180 set_bit(RELEASE_MAPINFO, &ep->com.flags);
3181
3182 laddr = (struct sockaddr_in *)&ep->com.mapped_local_addr;
3183 raddr = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
3184 laddr6 = (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
3185 raddr6 = (struct sockaddr_in6 *) &ep->com.mapped_remote_addr;
3186
3187 if (cm_id->remote_addr.ss_family == AF_INET) {
3188 iptype = 4;
3189 ra = (__u8 *)&raddr->sin_addr;
3190
3191 /*
3192 * Handle loopback requests to INADDR_ANY.
3193 */
3194 if ((__force int)raddr->sin_addr.s_addr == INADDR_ANY) {
3195 err = pick_local_ipaddrs(dev, cm_id);
3196 if (err)
3197 goto fail1;
3198 }
3199
3200 /* find a route */
3201 PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
3202 __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
3203 ra, ntohs(raddr->sin_port));
3204 ep->dst = find_route(dev, laddr->sin_addr.s_addr,
3205 raddr->sin_addr.s_addr, laddr->sin_port,
3206 raddr->sin_port, 0);
3207 } else {
3208 iptype = 6;
3209 ra = (__u8 *)&raddr6->sin6_addr;
3210
3211 /*
3212 * Handle loopback requests to INADDR_ANY.
3213 */
3214 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
3215 err = pick_local_ip6addrs(dev, cm_id);
3216 if (err)
3217 goto fail1;
3218 }
3219
3220 /* find a route */
3221 PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
3222 __func__, laddr6->sin6_addr.s6_addr,
3223 ntohs(laddr6->sin6_port),
3224 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
3225 ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
3226 raddr6->sin6_addr.s6_addr,
3227 laddr6->sin6_port, raddr6->sin6_port, 0,
3228 raddr6->sin6_scope_id);
3229 }
3230 if (!ep->dst) {
3231 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
3232 err = -EHOSTUNREACH;
3233 goto fail2;
3234 }
3235
3236 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true,
3237 ep->com.dev->rdev.lldi.adapter_type);
3238 if (err) {
3239 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
3240 goto fail3;
3241 }
3242
3243 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
3244 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
3245 ep->l2t->idx);
3246
3247 state_set(&ep->com, CONNECTING);
3248 ep->tos = 0;
3249
3250 /* send connect request to rnic */
3251 err = send_connect(ep);
3252 if (!err)
3253 goto out;
3254
3255 cxgb4_l2t_release(ep->l2t);
3256 fail3:
3257 dst_release(ep->dst);
3258 fail2:
3259 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
3260 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
3261 fail1:
3262 cm_id->rem_ref(cm_id);
3263 c4iw_put_ep(&ep->com);
3264 out:
3265 return err;
3266 }
3267
3268 static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3269 {
3270 int err;
3271 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
3272 &ep->com.mapped_local_addr;
3273
3274 c4iw_init_wr_wait(&ep->com.wr_wait);
3275 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
3276 ep->stid, &sin6->sin6_addr,
3277 sin6->sin6_port,
3278 ep->com.dev->rdev.lldi.rxq_ids[0]);
3279 if (!err)
3280 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3281 &ep->com.wr_wait,
3282 0, 0, __func__);
3283 else if (err > 0)
3284 err = net_xmit_errno(err);
3285 if (err)
3286 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
3287 err, ep->stid,
3288 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
3289 else
3290 cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
3291 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3292 return err;
3293 }
3294
3295 static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3296 {
3297 int err;
3298 struct sockaddr_in *sin = (struct sockaddr_in *)
3299 &ep->com.mapped_local_addr;
3300
3301 if (dev->rdev.lldi.enable_fw_ofld_conn) {
3302 do {
3303 err = cxgb4_create_server_filter(
3304 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3305 sin->sin_addr.s_addr, sin->sin_port, 0,
3306 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
3307 if (err == -EBUSY) {
3308 if (c4iw_fatal_error(&ep->com.dev->rdev)) {
3309 err = -EIO;
3310 break;
3311 }
3312 set_current_state(TASK_UNINTERRUPTIBLE);
3313 schedule_timeout(usecs_to_jiffies(100));
3314 }
3315 } while (err == -EBUSY);
3316 } else {
3317 c4iw_init_wr_wait(&ep->com.wr_wait);
3318 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
3319 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
3320 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
3321 if (!err)
3322 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3323 &ep->com.wr_wait,
3324 0, 0, __func__);
3325 else if (err > 0)
3326 err = net_xmit_errno(err);
3327 }
3328 if (err)
3329 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
3330 , err, ep->stid,
3331 &sin->sin_addr, ntohs(sin->sin_port));
3332 return err;
3333 }
3334
3335 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3336 {
3337 int err = 0;
3338 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3339 struct c4iw_listen_ep *ep;
3340 struct iwpm_dev_data pm_reg_msg;
3341 struct iwpm_sa_data pm_msg;
3342 int iwpm_err = 0;
3343
3344 might_sleep();
3345
3346 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3347 if (!ep) {
3348 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
3349 err = -ENOMEM;
3350 goto fail1;
3351 }
3352 PDBG("%s ep %p\n", __func__, ep);
3353 cm_id->add_ref(cm_id);
3354 ep->com.cm_id = cm_id;
3355 ep->com.dev = dev;
3356 ep->backlog = backlog;
3357 memcpy(&ep->com.local_addr, &cm_id->local_addr,
3358 sizeof(ep->com.local_addr));
3359
3360 /*
3361 * Allocate a server TID.
3362 */
3363 if (dev->rdev.lldi.enable_fw_ofld_conn &&
3364 ep->com.local_addr.ss_family == AF_INET)
3365 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
3366 cm_id->local_addr.ss_family, ep);
3367 else
3368 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
3369 cm_id->local_addr.ss_family, ep);
3370
3371 if (ep->stid == -1) {
3372 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
3373 err = -ENOMEM;
3374 goto fail2;
3375 }
3376 insert_handle(dev, &dev->stid_idr, ep, ep->stid);
3377
3378 /* No port mapper available, go with the specified info */
3379 memcpy(&ep->com.mapped_local_addr, &cm_id->local_addr,
3380 sizeof(ep->com.mapped_local_addr));
3381
3382 c4iw_form_reg_msg(dev, &pm_reg_msg);
3383 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_C4IW);
3384 if (iwpm_err) {
3385 PDBG("%s: Port Mapper reg pid fail (err = %d).\n",
3386 __func__, iwpm_err);
3387 }
3388 if (iwpm_valid_pid() && !iwpm_err) {
3389 memcpy(&pm_msg.loc_addr, &ep->com.local_addr,
3390 sizeof(ep->com.local_addr));
3391 iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_C4IW);
3392 if (iwpm_err)
3393 PDBG("%s: Port Mapper query fail (err = %d).\n",
3394 __func__, iwpm_err);
3395 else
3396 memcpy(&ep->com.mapped_local_addr,
3397 &pm_msg.mapped_loc_addr,
3398 sizeof(ep->com.mapped_local_addr));
3399 }
3400 if (iwpm_create_mapinfo(&ep->com.local_addr,
3401 &ep->com.mapped_local_addr, RDMA_NL_C4IW)) {
3402 err = -ENOMEM;
3403 goto fail3;
3404 }
3405 print_addr(&ep->com, __func__, "add_mapping/create_mapinfo");
3406
3407 set_bit(RELEASE_MAPINFO, &ep->com.flags);
3408 state_set(&ep->com, LISTEN);
3409 if (ep->com.local_addr.ss_family == AF_INET)
3410 err = create_server4(dev, ep);
3411 else
3412 err = create_server6(dev, ep);
3413 if (!err) {
3414 cm_id->provider_data = ep;
3415 goto out;
3416 }
3417
3418 fail3:
3419 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3420 ep->com.local_addr.ss_family);
3421 fail2:
3422 cm_id->rem_ref(cm_id);
3423 c4iw_put_ep(&ep->com);
3424 fail1:
3425 out:
3426 return err;
3427 }
3428
3429 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
3430 {
3431 int err;
3432 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
3433
3434 PDBG("%s ep %p\n", __func__, ep);
3435
3436 might_sleep();
3437 state_set(&ep->com, DEAD);
3438 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
3439 ep->com.local_addr.ss_family == AF_INET) {
3440 err = cxgb4_remove_server_filter(
3441 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3442 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3443 } else {
3444 struct sockaddr_in6 *sin6;
3445 c4iw_init_wr_wait(&ep->com.wr_wait);
3446 err = cxgb4_remove_server(
3447 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3448 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3449 if (err)
3450 goto done;
3451 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
3452 0, 0, __func__);
3453 sin6 = (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
3454 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3455 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3456 }
3457 remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
3458 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3459 ep->com.local_addr.ss_family);
3460 done:
3461 cm_id->rem_ref(cm_id);
3462 c4iw_put_ep(&ep->com);
3463 return err;
3464 }
3465
3466 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3467 {
3468 int ret = 0;
3469 int close = 0;
3470 int fatal = 0;
3471 struct c4iw_rdev *rdev;
3472
3473 mutex_lock(&ep->com.mutex);
3474
3475 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
3476 states[ep->com.state], abrupt);
3477
3478 rdev = &ep->com.dev->rdev;
3479 if (c4iw_fatal_error(rdev)) {
3480 fatal = 1;
3481 close_complete_upcall(ep, -EIO);
3482 ep->com.state = DEAD;
3483 }
3484 switch (ep->com.state) {
3485 case MPA_REQ_WAIT:
3486 case MPA_REQ_SENT:
3487 case MPA_REQ_RCVD:
3488 case MPA_REP_SENT:
3489 case FPDU_MODE:
3490 close = 1;
3491 if (abrupt)
3492 ep->com.state = ABORTING;
3493 else {
3494 ep->com.state = CLOSING;
3495 start_ep_timer(ep);
3496 }
3497 set_bit(CLOSE_SENT, &ep->com.flags);
3498 break;
3499 case CLOSING:
3500 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3501 close = 1;
3502 if (abrupt) {
3503 (void)stop_ep_timer(ep);
3504 ep->com.state = ABORTING;
3505 } else
3506 ep->com.state = MORIBUND;
3507 }
3508 break;
3509 case MORIBUND:
3510 case ABORTING:
3511 case DEAD:
3512 PDBG("%s ignoring disconnect ep %p state %u\n",
3513 __func__, ep, ep->com.state);
3514 break;
3515 default:
3516 BUG();
3517 break;
3518 }
3519
3520 if (close) {
3521 if (abrupt) {
3522 set_bit(EP_DISC_ABORT, &ep->com.history);
3523 close_complete_upcall(ep, -ECONNRESET);
3524 ret = send_abort(ep, NULL, gfp);
3525 } else {
3526 set_bit(EP_DISC_CLOSE, &ep->com.history);
3527 ret = send_halfclose(ep, gfp);
3528 }
3529 if (ret)
3530 fatal = 1;
3531 }
3532 mutex_unlock(&ep->com.mutex);
3533 if (fatal)
3534 release_ep_resources(ep);
3535 return ret;
3536 }
3537
3538 static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3539 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3540 {
3541 struct c4iw_ep *ep;
3542 int atid = be32_to_cpu(req->tid);
3543
3544 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3545 (__force u32) req->tid);
3546 if (!ep)
3547 return;
3548
3549 switch (req->retval) {
3550 case FW_ENOMEM:
3551 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3552 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3553 send_fw_act_open_req(ep, atid);
3554 return;
3555 }
3556 case FW_EADDRINUSE:
3557 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3558 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3559 send_fw_act_open_req(ep, atid);
3560 return;
3561 }
3562 break;
3563 default:
3564 pr_info("%s unexpected ofld conn wr retval %d\n",
3565 __func__, req->retval);
3566 break;
3567 }
3568 pr_err("active ofld_connect_wr failure %d atid %d\n",
3569 req->retval, atid);
3570 mutex_lock(&dev->rdev.stats.lock);
3571 dev->rdev.stats.act_ofld_conn_fails++;
3572 mutex_unlock(&dev->rdev.stats.lock);
3573 connect_reply_upcall(ep, status2errno(req->retval));
3574 state_set(&ep->com, DEAD);
3575 if (ep->com.remote_addr.ss_family == AF_INET6) {
3576 struct sockaddr_in6 *sin6 =
3577 (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
3578 cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
3579 (const u32 *)&sin6->sin6_addr.s6_addr, 1);
3580 }
3581 remove_handle(dev, &dev->atid_idr, atid);
3582 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3583 dst_release(ep->dst);
3584 cxgb4_l2t_release(ep->l2t);
3585 c4iw_put_ep(&ep->com);
3586 }
3587
3588 static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3589 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3590 {
3591 struct sk_buff *rpl_skb;
3592 struct cpl_pass_accept_req *cpl;
3593 int ret;
3594
3595 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3596 BUG_ON(!rpl_skb);
3597 if (req->retval) {
3598 PDBG("%s passive open failure %d\n", __func__, req->retval);
3599 mutex_lock(&dev->rdev.stats.lock);
3600 dev->rdev.stats.pas_ofld_conn_fails++;
3601 mutex_unlock(&dev->rdev.stats.lock);
3602 kfree_skb(rpl_skb);
3603 } else {
3604 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3605 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
3606 (__force u32) htonl(
3607 (__force u32) req->tid)));
3608 ret = pass_accept_req(dev, rpl_skb);
3609 if (!ret)
3610 kfree_skb(rpl_skb);
3611 }
3612 return;
3613 }
3614
3615 static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3616 {
3617 struct cpl_fw6_msg *rpl = cplhdr(skb);
3618 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3619
3620 switch (rpl->type) {
3621 case FW6_TYPE_CQE:
3622 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3623 break;
3624 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3625 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3626 switch (req->t_state) {
3627 case TCP_SYN_SENT:
3628 active_ofld_conn_reply(dev, skb, req);
3629 break;
3630 case TCP_SYN_RECV:
3631 passive_ofld_conn_reply(dev, skb, req);
3632 break;
3633 default:
3634 pr_err("%s unexpected ofld conn wr state %d\n",
3635 __func__, req->t_state);
3636 break;
3637 }
3638 break;
3639 }
3640 return 0;
3641 }
3642
3643 static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3644 {
3645 __be32 l2info;
3646 __be16 hdr_len, vlantag, len;
3647 u16 eth_hdr_len;
3648 int tcp_hdr_len, ip_hdr_len;
3649 u8 intf;
3650 struct cpl_rx_pkt *cpl = cplhdr(skb);
3651 struct cpl_pass_accept_req *req;
3652 struct tcp_options_received tmp_opt;
3653 struct c4iw_dev *dev;
3654 enum chip_type type;
3655
3656 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3657 /* Store values from cpl_rx_pkt in temporary location. */
3658 vlantag = cpl->vlan;
3659 len = cpl->len;
3660 l2info = cpl->l2info;
3661 hdr_len = cpl->hdr_len;
3662 intf = cpl->iff;
3663
3664 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3665
3666 /*
3667 * We need to parse the TCP options from SYN packet.
3668 * to generate cpl_pass_accept_req.
3669 */
3670 memset(&tmp_opt, 0, sizeof(tmp_opt));
3671 tcp_clear_options(&tmp_opt);
3672 tcp_parse_options(skb, &tmp_opt, 0, NULL);
3673
3674 req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
3675 memset(req, 0, sizeof(*req));
3676 req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
3677 SYN_MAC_IDX_V(RX_MACIDX_G(
3678 be32_to_cpu(l2info))) |
3679 SYN_XACT_MATCH_F);
3680 type = dev->rdev.lldi.adapter_type;
3681 tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len));
3682 ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len));
3683 req->hdr_len =
3684 cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info))));
3685 if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) {
3686 eth_hdr_len = is_t4(type) ?
3687 RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) :
3688 RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info));
3689 req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) |
3690 IP_HDR_LEN_V(ip_hdr_len) |
3691 ETH_HDR_LEN_V(eth_hdr_len));
3692 } else { /* T6 and later */
3693 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info));
3694 req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) |
3695 T6_IP_HDR_LEN_V(ip_hdr_len) |
3696 T6_ETH_HDR_LEN_V(eth_hdr_len));
3697 }
3698 req->vlan = vlantag;
3699 req->len = len;
3700 req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
3701 PASS_OPEN_TOS_V(tos));
3702 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3703 if (tmp_opt.wscale_ok)
3704 req->tcpopt.wsf = tmp_opt.snd_wscale;
3705 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3706 if (tmp_opt.sack_ok)
3707 req->tcpopt.sack = 1;
3708 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3709 return;
3710 }
3711
3712 static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3713 __be32 laddr, __be16 lport,
3714 __be32 raddr, __be16 rport,
3715 u32 rcv_isn, u32 filter, u16 window,
3716 u32 rss_qid, u8 port_id)
3717 {
3718 struct sk_buff *req_skb;
3719 struct fw_ofld_connection_wr *req;
3720 struct cpl_pass_accept_req *cpl = cplhdr(skb);
3721 int ret;
3722
3723 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
3724 req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
3725 memset(req, 0, sizeof(*req));
3726 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
3727 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
3728 req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
3729 req->le.filter = (__force __be32) filter;
3730 req->le.lport = lport;
3731 req->le.pport = rport;
3732 req->le.u.ipv4.lip = laddr;
3733 req->le.u.ipv4.pip = raddr;
3734 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
3735 req->tcb.rcv_adv = htons(window);
3736 req->tcb.t_state_to_astid =
3737 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
3738 FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
3739 FW_OFLD_CONNECTION_WR_ASTID_V(
3740 PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
3741
3742 /*
3743 * We store the qid in opt2 which will be used by the firmware
3744 * to send us the wr response.
3745 */
3746 req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
3747
3748 /*
3749 * We initialize the MSS index in TCB to 0xF.
3750 * So that when driver sends cpl_pass_accept_rpl
3751 * TCB picks up the correct value. If this was 0
3752 * TP will ignore any value > 0 for MSS index.
3753 */
3754 req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
3755 req->cookie = (uintptr_t)skb;
3756
3757 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
3758 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
3759 if (ret < 0) {
3760 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
3761 ret);
3762 kfree_skb(skb);
3763 kfree_skb(req_skb);
3764 }
3765 }
3766
3767 /*
3768 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
3769 * messages when a filter is being used instead of server to
3770 * redirect a syn packet. When packets hit filter they are redirected
3771 * to the offload queue and driver tries to establish the connection
3772 * using firmware work request.
3773 */
3774 static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
3775 {
3776 int stid;
3777 unsigned int filter;
3778 struct ethhdr *eh = NULL;
3779 struct vlan_ethhdr *vlan_eh = NULL;
3780 struct iphdr *iph;
3781 struct tcphdr *tcph;
3782 struct rss_header *rss = (void *)skb->data;
3783 struct cpl_rx_pkt *cpl = (void *)skb->data;
3784 struct cpl_pass_accept_req *req = (void *)(rss + 1);
3785 struct l2t_entry *e;
3786 struct dst_entry *dst;
3787 struct c4iw_ep *lep;
3788 u16 window;
3789 struct port_info *pi;
3790 struct net_device *pdev;
3791 u16 rss_qid, eth_hdr_len;
3792 int step;
3793 u32 tx_chan;
3794 struct neighbour *neigh;
3795
3796 /* Drop all non-SYN packets */
3797 if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
3798 goto reject;
3799
3800 /*
3801 * Drop all packets which did not hit the filter.
3802 * Unlikely to happen.
3803 */
3804 if (!(rss->filter_hit && rss->filter_tid))
3805 goto reject;
3806
3807 /*
3808 * Calculate the server tid from filter hit index from cpl_rx_pkt.
3809 */
3810 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
3811
3812 lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid);
3813 if (!lep) {
3814 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
3815 goto reject;
3816 }
3817
3818 switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) {
3819 case CHELSIO_T4:
3820 eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
3821 break;
3822 case CHELSIO_T5:
3823 eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
3824 break;
3825 case CHELSIO_T6:
3826 eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
3827 break;
3828 default:
3829 pr_err("T%d Chip is not supported\n",
3830 CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type));
3831 goto reject;
3832 }
3833
3834 if (eth_hdr_len == ETH_HLEN) {
3835 eh = (struct ethhdr *)(req + 1);
3836 iph = (struct iphdr *)(eh + 1);
3837 } else {
3838 vlan_eh = (struct vlan_ethhdr *)(req + 1);
3839 iph = (struct iphdr *)(vlan_eh + 1);
3840 skb->vlan_tci = ntohs(cpl->vlan);
3841 }
3842
3843 if (iph->version != 0x4)
3844 goto reject;
3845
3846 tcph = (struct tcphdr *)(iph + 1);
3847 skb_set_network_header(skb, (void *)iph - (void *)rss);
3848 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
3849 skb_get(skb);
3850
3851 PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
3852 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
3853 ntohs(tcph->source), iph->tos);
3854
3855 dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
3856 iph->tos);
3857 if (!dst) {
3858 pr_err("%s - failed to find dst entry!\n",
3859 __func__);
3860 goto reject;
3861 }
3862 neigh = dst_neigh_lookup_skb(dst, skb);
3863
3864 if (!neigh) {
3865 pr_err("%s - failed to allocate neigh!\n",
3866 __func__);
3867 goto free_dst;
3868 }
3869
3870 if (neigh->dev->flags & IFF_LOOPBACK) {
3871 pdev = ip_dev_find(&init_net, iph->daddr);
3872 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3873 pdev, 0);
3874 pi = (struct port_info *)netdev_priv(pdev);
3875 tx_chan = cxgb4_port_chan(pdev);
3876 dev_put(pdev);
3877 } else {
3878 pdev = get_real_dev(neigh->dev);
3879 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3880 pdev, 0);
3881 pi = (struct port_info *)netdev_priv(pdev);
3882 tx_chan = cxgb4_port_chan(pdev);
3883 }
3884 neigh_release(neigh);
3885 if (!e) {
3886 pr_err("%s - failed to allocate l2t entry!\n",
3887 __func__);
3888 goto free_dst;
3889 }
3890
3891 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
3892 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
3893 window = (__force u16) htons((__force u16)tcph->window);
3894
3895 /* Calcuate filter portion for LE region. */
3896 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
3897 dev->rdev.lldi.ports[0],
3898 e));
3899
3900 /*
3901 * Synthesize the cpl_pass_accept_req. We have everything except the
3902 * TID. Once firmware sends a reply with TID we update the TID field
3903 * in cpl and pass it through the regular cpl_pass_accept_req path.
3904 */
3905 build_cpl_pass_accept_req(skb, stid, iph->tos);
3906 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
3907 tcph->source, ntohl(tcph->seq), filter, window,
3908 rss_qid, pi->port_id);
3909 cxgb4_l2t_release(e);
3910 free_dst:
3911 dst_release(dst);
3912 reject:
3913 return 0;
3914 }
3915
3916 /*
3917 * These are the real handlers that are called from a
3918 * work queue.
3919 */
3920 static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
3921 [CPL_ACT_ESTABLISH] = act_establish,
3922 [CPL_ACT_OPEN_RPL] = act_open_rpl,
3923 [CPL_RX_DATA] = rx_data,
3924 [CPL_ABORT_RPL_RSS] = abort_rpl,
3925 [CPL_ABORT_RPL] = abort_rpl,
3926 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
3927 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
3928 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
3929 [CPL_PASS_ESTABLISH] = pass_establish,
3930 [CPL_PEER_CLOSE] = peer_close,
3931 [CPL_ABORT_REQ_RSS] = peer_abort,
3932 [CPL_CLOSE_CON_RPL] = close_con_rpl,
3933 [CPL_RDMA_TERMINATE] = terminate,
3934 [CPL_FW4_ACK] = fw4_ack,
3935 [CPL_FW6_MSG] = deferred_fw6_msg,
3936 [CPL_RX_PKT] = rx_pkt
3937 };
3938
3939 static void process_timeout(struct c4iw_ep *ep)
3940 {
3941 struct c4iw_qp_attributes attrs;
3942 int abort = 1;
3943
3944 mutex_lock(&ep->com.mutex);
3945 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
3946 ep->com.state);
3947 set_bit(TIMEDOUT, &ep->com.history);
3948 switch (ep->com.state) {
3949 case MPA_REQ_SENT:
3950 __state_set(&ep->com, ABORTING);
3951 connect_reply_upcall(ep, -ETIMEDOUT);
3952 break;
3953 case MPA_REQ_WAIT:
3954 __state_set(&ep->com, ABORTING);
3955 break;
3956 case CLOSING:
3957 case MORIBUND:
3958 if (ep->com.cm_id && ep->com.qp) {
3959 attrs.next_state = C4IW_QP_STATE_ERROR;
3960 c4iw_modify_qp(ep->com.qp->rhp,
3961 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
3962 &attrs, 1);
3963 }
3964 __state_set(&ep->com, ABORTING);
3965 close_complete_upcall(ep, -ETIMEDOUT);
3966 break;
3967 case ABORTING:
3968 case DEAD:
3969
3970 /*
3971 * These states are expected if the ep timed out at the same
3972 * time as another thread was calling stop_ep_timer().
3973 * So we silently do nothing for these states.
3974 */
3975 abort = 0;
3976 break;
3977 default:
3978 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
3979 __func__, ep, ep->hwtid, ep->com.state);
3980 abort = 0;
3981 }
3982 if (abort)
3983 abort_connection(ep, NULL, GFP_KERNEL);
3984 mutex_unlock(&ep->com.mutex);
3985 c4iw_put_ep(&ep->com);
3986 }
3987
3988 static void process_timedout_eps(void)
3989 {
3990 struct c4iw_ep *ep;
3991
3992 spin_lock_irq(&timeout_lock);
3993 while (!list_empty(&timeout_list)) {
3994 struct list_head *tmp;
3995
3996 tmp = timeout_list.next;
3997 list_del(tmp);
3998 tmp->next = NULL;
3999 tmp->prev = NULL;
4000 spin_unlock_irq(&timeout_lock);
4001 ep = list_entry(tmp, struct c4iw_ep, entry);
4002 process_timeout(ep);
4003 spin_lock_irq(&timeout_lock);
4004 }
4005 spin_unlock_irq(&timeout_lock);
4006 }
4007
4008 static void process_work(struct work_struct *work)
4009 {
4010 struct sk_buff *skb = NULL;
4011 struct c4iw_dev *dev;
4012 struct cpl_act_establish *rpl;
4013 unsigned int opcode;
4014 int ret;
4015
4016 process_timedout_eps();
4017 while ((skb = skb_dequeue(&rxq))) {
4018 rpl = cplhdr(skb);
4019 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
4020 opcode = rpl->ot.opcode;
4021
4022 BUG_ON(!work_handlers[opcode]);
4023 ret = work_handlers[opcode](dev, skb);
4024 if (!ret)
4025 kfree_skb(skb);
4026 process_timedout_eps();
4027 }
4028 }
4029
4030 static DECLARE_WORK(skb_work, process_work);
4031
4032 static void ep_timeout(unsigned long arg)
4033 {
4034 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
4035 int kickit = 0;
4036
4037 spin_lock(&timeout_lock);
4038 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
4039 /*
4040 * Only insert if it is not already on the list.
4041 */
4042 if (!ep->entry.next) {
4043 list_add_tail(&ep->entry, &timeout_list);
4044 kickit = 1;
4045 }
4046 }
4047 spin_unlock(&timeout_lock);
4048 if (kickit)
4049 queue_work(workq, &skb_work);
4050 }
4051
4052 /*
4053 * All the CM events are handled on a work queue to have a safe context.
4054 */
4055 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
4056 {
4057
4058 /*
4059 * Save dev in the skb->cb area.
4060 */
4061 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
4062
4063 /*
4064 * Queue the skb and schedule the worker thread.
4065 */
4066 skb_queue_tail(&rxq, skb);
4067 queue_work(workq, &skb_work);
4068 return 0;
4069 }
4070
4071 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
4072 {
4073 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
4074
4075 if (rpl->status != CPL_ERR_NONE) {
4076 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
4077 "for tid %u\n", rpl->status, GET_TID(rpl));
4078 }
4079 kfree_skb(skb);
4080 return 0;
4081 }
4082
4083 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
4084 {
4085 struct cpl_fw6_msg *rpl = cplhdr(skb);
4086 struct c4iw_wr_wait *wr_waitp;
4087 int ret;
4088
4089 PDBG("%s type %u\n", __func__, rpl->type);
4090
4091 switch (rpl->type) {
4092 case FW6_TYPE_WR_RPL:
4093 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
4094 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
4095 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
4096 if (wr_waitp)
4097 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
4098 kfree_skb(skb);
4099 break;
4100 case FW6_TYPE_CQE:
4101 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
4102 sched(dev, skb);
4103 break;
4104 default:
4105 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
4106 rpl->type);
4107 kfree_skb(skb);
4108 break;
4109 }
4110 return 0;
4111 }
4112
4113 static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
4114 {
4115 struct cpl_abort_req_rss *req = cplhdr(skb);
4116 struct c4iw_ep *ep;
4117 struct tid_info *t = dev->rdev.lldi.tids;
4118 unsigned int tid = GET_TID(req);
4119
4120 ep = lookup_tid(t, tid);
4121 if (!ep) {
4122 printk(KERN_WARNING MOD
4123 "Abort on non-existent endpoint, tid %d\n", tid);
4124 kfree_skb(skb);
4125 return 0;
4126 }
4127 if (is_neg_adv(req->status)) {
4128 PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
4129 __func__, ep->hwtid, req->status,
4130 neg_adv_str(req->status));
4131 ep->stats.abort_neg_adv++;
4132 dev->rdev.stats.neg_adv++;
4133 kfree_skb(skb);
4134 return 0;
4135 }
4136 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
4137 ep->com.state);
4138
4139 /*
4140 * Wake up any threads in rdma_init() or rdma_fini().
4141 * However, if we are on MPAv2 and want to retry with MPAv1
4142 * then, don't wake up yet.
4143 */
4144 if (mpa_rev == 2 && !ep->tried_with_mpa_v1) {
4145 if (ep->com.state != MPA_REQ_SENT)
4146 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
4147 } else
4148 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
4149 sched(dev, skb);
4150 return 0;
4151 }
4152
4153 /*
4154 * Most upcalls from the T4 Core go to sched() to
4155 * schedule the processing on a work queue.
4156 */
4157 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
4158 [CPL_ACT_ESTABLISH] = sched,
4159 [CPL_ACT_OPEN_RPL] = sched,
4160 [CPL_RX_DATA] = sched,
4161 [CPL_ABORT_RPL_RSS] = sched,
4162 [CPL_ABORT_RPL] = sched,
4163 [CPL_PASS_OPEN_RPL] = sched,
4164 [CPL_CLOSE_LISTSRV_RPL] = sched,
4165 [CPL_PASS_ACCEPT_REQ] = sched,
4166 [CPL_PASS_ESTABLISH] = sched,
4167 [CPL_PEER_CLOSE] = sched,
4168 [CPL_CLOSE_CON_RPL] = sched,
4169 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
4170 [CPL_RDMA_TERMINATE] = sched,
4171 [CPL_FW4_ACK] = sched,
4172 [CPL_SET_TCB_RPL] = set_tcb_rpl,
4173 [CPL_FW6_MSG] = fw6_msg,
4174 [CPL_RX_PKT] = sched
4175 };
4176
4177 int __init c4iw_cm_init(void)
4178 {
4179 spin_lock_init(&timeout_lock);
4180 skb_queue_head_init(&rxq);
4181
4182 workq = create_singlethread_workqueue("iw_cxgb4");
4183 if (!workq)
4184 return -ENOMEM;
4185
4186 return 0;
4187 }
4188
4189 void c4iw_cm_term(void)
4190 {
4191 WARN_ON(!list_empty(&timeout_list));
4192 flush_workqueue(workq);
4193 destroy_workqueue(workq);
4194 }
Linux with added FPC-III support