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3c2d774c GS |
1 | /* |
2 | * Copyright (c) 2006 - 2008 NetEffect, Inc. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | * | |
32 | */ | |
33 | ||
34 | ||
35 | #define TCPOPT_TIMESTAMP 8 | |
36 | ||
37 | #include <asm/atomic.h> | |
38 | #include <linux/skbuff.h> | |
39 | #include <linux/ip.h> | |
40 | #include <linux/tcp.h> | |
41 | #include <linux/init.h> | |
42 | #include <linux/if_arp.h> | |
43 | #include <linux/notifier.h> | |
44 | #include <linux/net.h> | |
45 | #include <linux/types.h> | |
46 | #include <linux/timer.h> | |
47 | #include <linux/time.h> | |
48 | #include <linux/delay.h> | |
49 | #include <linux/etherdevice.h> | |
50 | #include <linux/netdevice.h> | |
51 | #include <linux/random.h> | |
52 | #include <linux/list.h> | |
53 | #include <linux/threads.h> | |
54 | ||
55 | #include <net/neighbour.h> | |
56 | #include <net/route.h> | |
57 | #include <net/ip_fib.h> | |
58 | ||
59 | #include "nes.h" | |
60 | ||
61 | u32 cm_packets_sent; | |
62 | u32 cm_packets_bounced; | |
63 | u32 cm_packets_dropped; | |
64 | u32 cm_packets_retrans; | |
65 | u32 cm_packets_created; | |
66 | u32 cm_packets_received; | |
67 | u32 cm_listens_created; | |
68 | u32 cm_listens_destroyed; | |
69 | u32 cm_backlog_drops; | |
70 | atomic_t cm_loopbacks; | |
71 | atomic_t cm_nodes_created; | |
72 | atomic_t cm_nodes_destroyed; | |
73 | atomic_t cm_accel_dropped_pkts; | |
74 | atomic_t cm_resets_recvd; | |
75 | ||
76 | static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *); | |
77 | static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, | |
78 | struct nes_vnic *, struct nes_cm_info *); | |
79 | static int add_ref_cm_node(struct nes_cm_node *); | |
80 | static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *); | |
81 | static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *); | |
82 | ||
83 | ||
84 | /* External CM API Interface */ | |
85 | /* instance of function pointers for client API */ | |
86 | /* set address of this instance to cm_core->cm_ops at cm_core alloc */ | |
87 | static struct nes_cm_ops nes_cm_api = { | |
88 | mini_cm_accelerated, | |
89 | mini_cm_listen, | |
90 | mini_cm_del_listen, | |
91 | mini_cm_connect, | |
92 | mini_cm_close, | |
93 | mini_cm_accept, | |
94 | mini_cm_reject, | |
95 | mini_cm_recv_pkt, | |
96 | mini_cm_dealloc_core, | |
97 | mini_cm_get, | |
98 | mini_cm_set | |
99 | }; | |
100 | ||
101 | struct nes_cm_core *g_cm_core; | |
102 | ||
103 | atomic_t cm_connects; | |
104 | atomic_t cm_accepts; | |
105 | atomic_t cm_disconnects; | |
106 | atomic_t cm_closes; | |
107 | atomic_t cm_connecteds; | |
108 | atomic_t cm_connect_reqs; | |
109 | atomic_t cm_rejects; | |
110 | ||
111 | ||
112 | /** | |
113 | * create_event | |
114 | */ | |
115 | static struct nes_cm_event *create_event(struct nes_cm_node *cm_node, | |
116 | enum nes_cm_event_type type) | |
117 | { | |
118 | struct nes_cm_event *event; | |
119 | ||
120 | if (!cm_node->cm_id) | |
121 | return NULL; | |
122 | ||
123 | /* allocate an empty event */ | |
124 | event = kzalloc(sizeof(*event), GFP_ATOMIC); | |
125 | ||
126 | if (!event) | |
127 | return NULL; | |
128 | ||
129 | event->type = type; | |
130 | event->cm_node = cm_node; | |
131 | event->cm_info.rem_addr = cm_node->rem_addr; | |
132 | event->cm_info.loc_addr = cm_node->loc_addr; | |
133 | event->cm_info.rem_port = cm_node->rem_port; | |
134 | event->cm_info.loc_port = cm_node->loc_port; | |
135 | event->cm_info.cm_id = cm_node->cm_id; | |
136 | ||
137 | nes_debug(NES_DBG_CM, "Created event=%p, type=%u, dst_addr=%08x[%x]," | |
138 | " src_addr=%08x[%x]\n", | |
139 | event, type, | |
140 | event->cm_info.loc_addr, event->cm_info.loc_port, | |
141 | event->cm_info.rem_addr, event->cm_info.rem_port); | |
142 | ||
143 | nes_cm_post_event(event); | |
144 | return event; | |
145 | } | |
146 | ||
147 | ||
148 | /** | |
149 | * send_mpa_request | |
150 | */ | |
151 | int send_mpa_request(struct nes_cm_node *cm_node) | |
152 | { | |
153 | struct sk_buff *skb; | |
154 | int ret; | |
155 | ||
156 | skb = get_free_pkt(cm_node); | |
157 | if (!skb) { | |
158 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
159 | return -1; | |
160 | } | |
161 | ||
162 | /* send an MPA Request frame */ | |
163 | form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame, | |
164 | cm_node->mpa_frame_size, SET_ACK); | |
165 | ||
166 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
167 | if (ret < 0) { | |
168 | return ret; | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | ||
175 | /** | |
176 | * recv_mpa - process a received TCP pkt, we are expecting an | |
177 | * IETF MPA frame | |
178 | */ | |
179 | static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 len) | |
180 | { | |
181 | struct ietf_mpa_frame *mpa_frame; | |
182 | ||
183 | /* assume req frame is in tcp data payload */ | |
184 | if (len < sizeof(struct ietf_mpa_frame)) { | |
185 | nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len); | |
186 | return -1; | |
187 | } | |
188 | ||
189 | mpa_frame = (struct ietf_mpa_frame *)buffer; | |
190 | cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len); | |
191 | ||
192 | if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) { | |
193 | nes_debug(NES_DBG_CM, "The received ietf buffer was not right" | |
194 | " complete (%x + %x != %x)\n", | |
195 | cm_node->mpa_frame_size, (u32)sizeof(struct ietf_mpa_frame), len); | |
196 | return -1; | |
197 | } | |
198 | ||
199 | /* copy entire MPA frame to our cm_node's frame */ | |
200 | memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame), | |
201 | cm_node->mpa_frame_size); | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
206 | ||
207 | /** | |
208 | * handle_exception_pkt - process an exception packet. | |
209 | * We have been in a TSA state, and we have now received SW | |
210 | * TCP/IP traffic should be a FIN request or IP pkt with options | |
211 | */ | |
212 | static int handle_exception_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb) | |
213 | { | |
214 | int ret = 0; | |
215 | struct tcphdr *tcph = tcp_hdr(skb); | |
216 | ||
217 | /* first check to see if this a FIN pkt */ | |
218 | if (tcph->fin) { | |
219 | /* we need to ACK the FIN request */ | |
220 | send_ack(cm_node); | |
221 | ||
222 | /* check which side we are (client/server) and set next state accordingly */ | |
223 | if (cm_node->tcp_cntxt.client) | |
224 | cm_node->state = NES_CM_STATE_CLOSING; | |
225 | else { | |
226 | /* we are the server side */ | |
227 | cm_node->state = NES_CM_STATE_CLOSE_WAIT; | |
228 | /* since this is a self contained CM we don't wait for */ | |
229 | /* an APP to close us, just send final FIN immediately */ | |
230 | ret = send_fin(cm_node, NULL); | |
231 | cm_node->state = NES_CM_STATE_LAST_ACK; | |
232 | } | |
233 | } else { | |
234 | ret = -EINVAL; | |
235 | } | |
236 | ||
237 | return ret; | |
238 | } | |
239 | ||
240 | ||
241 | /** | |
242 | * form_cm_frame - get a free packet and build empty frame Use | |
243 | * node info to build. | |
244 | */ | |
245 | struct sk_buff *form_cm_frame(struct sk_buff *skb, struct nes_cm_node *cm_node, | |
246 | void *options, u32 optionsize, void *data, u32 datasize, u8 flags) | |
247 | { | |
248 | struct tcphdr *tcph; | |
249 | struct iphdr *iph; | |
250 | struct ethhdr *ethh; | |
251 | u8 *buf; | |
252 | u16 packetsize = sizeof(*iph); | |
253 | ||
254 | packetsize += sizeof(*tcph); | |
255 | packetsize += optionsize + datasize; | |
256 | ||
257 | memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph)); | |
258 | ||
259 | skb->len = 0; | |
260 | buf = skb_put(skb, packetsize + ETH_HLEN); | |
261 | ||
262 | ethh = (struct ethhdr *) buf; | |
263 | buf += ETH_HLEN; | |
264 | ||
265 | iph = (struct iphdr *)buf; | |
266 | buf += sizeof(*iph); | |
267 | tcph = (struct tcphdr *)buf; | |
268 | skb_reset_mac_header(skb); | |
269 | skb_set_network_header(skb, ETH_HLEN); | |
270 | skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph)); | |
271 | buf += sizeof(*tcph); | |
272 | ||
273 | skb->ip_summed = CHECKSUM_PARTIAL; | |
274 | skb->protocol = htons(0x800); | |
275 | skb->data_len = 0; | |
276 | skb->mac_len = ETH_HLEN; | |
277 | ||
278 | memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN); | |
279 | memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN); | |
280 | ethh->h_proto = htons(0x0800); | |
281 | ||
282 | iph->version = IPVERSION; | |
283 | iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ | |
284 | iph->tos = 0; | |
285 | iph->tot_len = htons(packetsize); | |
286 | iph->id = htons(++cm_node->tcp_cntxt.loc_id); | |
287 | ||
288 | iph->frag_off = htons(0x4000); | |
289 | iph->ttl = 0x40; | |
290 | iph->protocol = 0x06; /* IPPROTO_TCP */ | |
291 | ||
292 | iph->saddr = htonl(cm_node->loc_addr); | |
293 | iph->daddr = htonl(cm_node->rem_addr); | |
294 | ||
295 | tcph->source = htons(cm_node->loc_port); | |
296 | tcph->dest = htons(cm_node->rem_port); | |
297 | tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); | |
298 | ||
299 | if (flags & SET_ACK) { | |
300 | cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; | |
301 | tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); | |
302 | tcph->ack = 1; | |
303 | } else | |
304 | tcph->ack_seq = 0; | |
305 | ||
306 | if (flags & SET_SYN) { | |
307 | cm_node->tcp_cntxt.loc_seq_num++; | |
308 | tcph->syn = 1; | |
309 | } else | |
310 | cm_node->tcp_cntxt.loc_seq_num += datasize; /* data (no headers) */ | |
311 | ||
312 | if (flags & SET_FIN) | |
313 | tcph->fin = 1; | |
314 | ||
315 | if (flags & SET_RST) | |
316 | tcph->rst = 1; | |
317 | ||
318 | tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2); | |
319 | tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); | |
320 | tcph->urg_ptr = 0; | |
321 | if (optionsize) | |
322 | memcpy(buf, options, optionsize); | |
323 | buf += optionsize; | |
324 | if (datasize) | |
325 | memcpy(buf, data, datasize); | |
326 | ||
327 | skb_shinfo(skb)->nr_frags = 0; | |
328 | cm_packets_created++; | |
329 | ||
330 | return skb; | |
331 | } | |
332 | ||
333 | ||
334 | /** | |
335 | * print_core - dump a cm core | |
336 | */ | |
337 | static void print_core(struct nes_cm_core *core) | |
338 | { | |
339 | nes_debug(NES_DBG_CM, "---------------------------------------------\n"); | |
340 | nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core); | |
341 | if (!core) | |
342 | return; | |
343 | nes_debug(NES_DBG_CM, "---------------------------------------------\n"); | |
344 | nes_debug(NES_DBG_CM, "Session ID : %u \n", atomic_read(&core->session_id)); | |
345 | ||
346 | nes_debug(NES_DBG_CM, "State : %u \n", core->state); | |
347 | ||
348 | nes_debug(NES_DBG_CM, "Tx Free cnt : %u \n", skb_queue_len(&core->tx_free_list)); | |
349 | nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt)); | |
350 | nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt)); | |
351 | ||
352 | nes_debug(NES_DBG_CM, "core : %p \n", core); | |
353 | ||
354 | nes_debug(NES_DBG_CM, "-------------- end core ---------------\n"); | |
355 | } | |
356 | ||
357 | ||
358 | /** | |
359 | * schedule_nes_timer | |
360 | * note - cm_node needs to be protected before calling this. Encase in: | |
361 | * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node); | |
362 | */ | |
363 | int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb, | |
364 | enum nes_timer_type type, int send_retrans, | |
365 | int close_when_complete) | |
366 | { | |
367 | unsigned long flags; | |
368 | struct nes_cm_core *cm_core; | |
369 | struct nes_timer_entry *new_send; | |
370 | int ret = 0; | |
371 | u32 was_timer_set; | |
372 | ||
ed0ba33d AB |
373 | if (!cm_node) |
374 | return -EINVAL; | |
3c2d774c GS |
375 | new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); |
376 | if (!new_send) | |
377 | return -1; | |
3c2d774c GS |
378 | |
379 | /* new_send->timetosend = currenttime */ | |
380 | new_send->retrycount = NES_DEFAULT_RETRYS; | |
381 | new_send->retranscount = NES_DEFAULT_RETRANS; | |
382 | new_send->skb = skb; | |
383 | new_send->timetosend = jiffies; | |
384 | new_send->type = type; | |
385 | new_send->netdev = cm_node->netdev; | |
386 | new_send->send_retrans = send_retrans; | |
387 | new_send->close_when_complete = close_when_complete; | |
388 | ||
389 | if (type == NES_TIMER_TYPE_CLOSE) { | |
390 | new_send->timetosend += (HZ/2); /* TODO: decide on the correct value here */ | |
391 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
392 | list_add_tail(&new_send->list, &cm_node->recv_list); | |
393 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
394 | } | |
395 | ||
396 | if (type == NES_TIMER_TYPE_SEND) { | |
397 | new_send->seq_num = htonl(tcp_hdr(skb)->seq); | |
398 | atomic_inc(&new_send->skb->users); | |
399 | ||
400 | ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev); | |
401 | if (ret != NETDEV_TX_OK) { | |
402 | nes_debug(NES_DBG_CM, "Error sending packet %p (jiffies = %lu)\n", | |
403 | new_send, jiffies); | |
404 | atomic_dec(&new_send->skb->users); | |
405 | new_send->timetosend = jiffies; | |
406 | } else { | |
407 | cm_packets_sent++; | |
408 | if (!send_retrans) { | |
409 | if (close_when_complete) | |
410 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
411 | dev_kfree_skb_any(new_send->skb); | |
412 | kfree(new_send); | |
413 | return ret; | |
414 | } | |
415 | new_send->timetosend = jiffies + NES_RETRY_TIMEOUT; | |
416 | } | |
417 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
418 | list_add_tail(&new_send->list, &cm_node->retrans_list); | |
419 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
420 | } | |
421 | if (type == NES_TIMER_TYPE_RECV) { | |
422 | new_send->seq_num = htonl(tcp_hdr(skb)->seq); | |
423 | new_send->timetosend = jiffies; | |
424 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
425 | list_add_tail(&new_send->list, &cm_node->recv_list); | |
426 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
427 | } | |
428 | cm_core = cm_node->cm_core; | |
429 | ||
430 | was_timer_set = timer_pending(&cm_core->tcp_timer); | |
431 | ||
432 | if (!was_timer_set) { | |
433 | cm_core->tcp_timer.expires = new_send->timetosend; | |
434 | add_timer(&cm_core->tcp_timer); | |
435 | } | |
436 | ||
437 | return ret; | |
438 | } | |
439 | ||
440 | ||
441 | /** | |
442 | * nes_cm_timer_tick | |
443 | */ | |
444 | void nes_cm_timer_tick(unsigned long pass) | |
445 | { | |
446 | unsigned long flags, qplockflags; | |
447 | unsigned long nexttimeout = jiffies + NES_LONG_TIME; | |
448 | struct iw_cm_id *cm_id; | |
449 | struct nes_cm_node *cm_node; | |
450 | struct nes_timer_entry *send_entry, *recv_entry; | |
451 | struct list_head *list_core, *list_core_temp; | |
452 | struct list_head *list_node, *list_node_temp; | |
453 | struct nes_cm_core *cm_core = g_cm_core; | |
454 | struct nes_qp *nesqp; | |
455 | struct sk_buff *skb; | |
456 | u32 settimer = 0; | |
457 | int ret = NETDEV_TX_OK; | |
458 | int node_done; | |
459 | ||
460 | spin_lock_irqsave(&cm_core->ht_lock, flags); | |
461 | ||
462 | list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) { | |
463 | cm_node = container_of(list_node, struct nes_cm_node, list); | |
464 | add_ref_cm_node(cm_node); | |
465 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
466 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
467 | list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) { | |
468 | recv_entry = container_of(list_core, struct nes_timer_entry, list); | |
469 | if ((time_after(recv_entry->timetosend, jiffies)) && | |
470 | (recv_entry->type == NES_TIMER_TYPE_CLOSE)) { | |
471 | if (nexttimeout > recv_entry->timetosend || !settimer) { | |
472 | nexttimeout = recv_entry->timetosend; | |
473 | settimer = 1; | |
474 | } | |
475 | continue; | |
476 | } | |
477 | list_del(&recv_entry->list); | |
478 | cm_id = cm_node->cm_id; | |
479 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
480 | if (recv_entry->type == NES_TIMER_TYPE_CLOSE) { | |
481 | nesqp = (struct nes_qp *)recv_entry->skb; | |
482 | spin_lock_irqsave(&nesqp->lock, qplockflags); | |
483 | if (nesqp->cm_id) { | |
484 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, refcount = %d: " | |
485 | "****** HIT A NES_TIMER_TYPE_CLOSE" | |
486 | " with something to do!!! ******\n", | |
487 | nesqp->hwqp.qp_id, cm_id, | |
488 | atomic_read(&nesqp->refcount)); | |
489 | nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED; | |
490 | nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT; | |
491 | nesqp->ibqp_state = IB_QPS_ERR; | |
492 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); | |
493 | nes_cm_disconn(nesqp); | |
494 | } else { | |
495 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); | |
496 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, refcount = %d:" | |
497 | " ****** HIT A NES_TIMER_TYPE_CLOSE" | |
498 | " with nothing to do!!! ******\n", | |
499 | nesqp->hwqp.qp_id, cm_id, | |
500 | atomic_read(&nesqp->refcount)); | |
501 | nes_rem_ref(&nesqp->ibqp); | |
502 | } | |
503 | if (cm_id) | |
504 | cm_id->rem_ref(cm_id); | |
505 | } | |
506 | kfree(recv_entry); | |
507 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
508 | } | |
509 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
510 | ||
511 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
512 | node_done = 0; | |
513 | list_for_each_safe(list_core, list_node_temp, &cm_node->retrans_list) { | |
514 | if (node_done) { | |
515 | break; | |
516 | } | |
517 | send_entry = container_of(list_core, struct nes_timer_entry, list); | |
518 | if (time_after(send_entry->timetosend, jiffies)) { | |
519 | if (cm_node->state != NES_CM_STATE_TSA) { | |
520 | if ((nexttimeout > send_entry->timetosend) || !settimer) { | |
521 | nexttimeout = send_entry->timetosend; | |
522 | settimer = 1; | |
523 | } | |
524 | node_done = 1; | |
525 | continue; | |
526 | } else { | |
527 | list_del(&send_entry->list); | |
528 | skb = send_entry->skb; | |
529 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
530 | dev_kfree_skb_any(skb); | |
531 | kfree(send_entry); | |
532 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
533 | continue; | |
534 | } | |
535 | } | |
536 | if (send_entry->type == NES_TIMER_NODE_CLEANUP) { | |
537 | list_del(&send_entry->list); | |
538 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
539 | kfree(send_entry); | |
540 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
541 | continue; | |
542 | } | |
543 | if ((send_entry->seq_num < cm_node->tcp_cntxt.rem_ack_num) || | |
544 | (cm_node->state == NES_CM_STATE_TSA) || | |
545 | (cm_node->state == NES_CM_STATE_CLOSED)) { | |
546 | skb = send_entry->skb; | |
547 | list_del(&send_entry->list); | |
548 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
549 | kfree(send_entry); | |
550 | dev_kfree_skb_any(skb); | |
551 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
552 | continue; | |
553 | } | |
554 | ||
555 | if (!send_entry->retranscount || !send_entry->retrycount) { | |
556 | cm_packets_dropped++; | |
557 | skb = send_entry->skb; | |
558 | list_del(&send_entry->list); | |
559 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
560 | dev_kfree_skb_any(skb); | |
561 | kfree(send_entry); | |
562 | if (cm_node->state == NES_CM_STATE_SYN_RCVD) { | |
563 | /* this node never even generated an indication up to the cm */ | |
564 | rem_ref_cm_node(cm_core, cm_node); | |
565 | } else { | |
566 | cm_node->state = NES_CM_STATE_CLOSED; | |
567 | create_event(cm_node, NES_CM_EVENT_ABORTED); | |
568 | } | |
569 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
570 | continue; | |
571 | } | |
572 | /* this seems like the correct place, but leave send entry unprotected */ | |
573 | // spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
574 | atomic_inc(&send_entry->skb->users); | |
575 | cm_packets_retrans++; | |
576 | nes_debug(NES_DBG_CM, "Retransmitting send_entry %p for node %p," | |
577 | " jiffies = %lu, time to send = %lu, retranscount = %u, " | |
578 | "send_entry->seq_num = 0x%08X, cm_node->tcp_cntxt.rem_ack_num = 0x%08X\n", | |
579 | send_entry, cm_node, jiffies, send_entry->timetosend, send_entry->retranscount, | |
580 | send_entry->seq_num, cm_node->tcp_cntxt.rem_ack_num); | |
581 | ||
582 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
583 | ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev); | |
584 | if (ret != NETDEV_TX_OK) { | |
585 | cm_packets_bounced++; | |
586 | atomic_dec(&send_entry->skb->users); | |
587 | send_entry->retrycount--; | |
588 | nexttimeout = jiffies + NES_SHORT_TIME; | |
589 | settimer = 1; | |
590 | node_done = 1; | |
591 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
592 | continue; | |
593 | } else { | |
594 | cm_packets_sent++; | |
595 | } | |
596 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
597 | list_del(&send_entry->list); | |
598 | nes_debug(NES_DBG_CM, "Packet Sent: retrans count = %u, retry count = %u.\n", | |
599 | send_entry->retranscount, send_entry->retrycount); | |
600 | if (send_entry->send_retrans) { | |
601 | send_entry->retranscount--; | |
602 | send_entry->timetosend = jiffies + NES_RETRY_TIMEOUT; | |
603 | if (nexttimeout > send_entry->timetosend || !settimer) { | |
604 | nexttimeout = send_entry->timetosend; | |
605 | settimer = 1; | |
606 | } | |
607 | list_add(&send_entry->list, &cm_node->retrans_list); | |
608 | continue; | |
609 | } else { | |
610 | int close_when_complete; | |
611 | skb = send_entry->skb; | |
612 | close_when_complete = send_entry->close_when_complete; | |
613 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
614 | if (close_when_complete) { | |
615 | BUG_ON(atomic_read(&cm_node->ref_count) == 1); | |
616 | rem_ref_cm_node(cm_core, cm_node); | |
617 | } | |
618 | dev_kfree_skb_any(skb); | |
619 | kfree(send_entry); | |
620 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
621 | continue; | |
622 | } | |
623 | } | |
624 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
625 | ||
626 | rem_ref_cm_node(cm_core, cm_node); | |
627 | ||
628 | spin_lock_irqsave(&cm_core->ht_lock, flags); | |
629 | if (ret != NETDEV_TX_OK) | |
630 | break; | |
631 | } | |
632 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
633 | ||
634 | if (settimer) { | |
635 | if (!timer_pending(&cm_core->tcp_timer)) { | |
636 | cm_core->tcp_timer.expires = nexttimeout; | |
637 | add_timer(&cm_core->tcp_timer); | |
638 | } | |
639 | } | |
640 | } | |
641 | ||
642 | ||
643 | /** | |
644 | * send_syn | |
645 | */ | |
646 | int send_syn(struct nes_cm_node *cm_node, u32 sendack) | |
647 | { | |
648 | int ret; | |
649 | int flags = SET_SYN; | |
650 | struct sk_buff *skb; | |
651 | char optionsbuffer[sizeof(struct option_mss) + | |
652 | sizeof(struct option_windowscale) + | |
653 | sizeof(struct option_base) + 1]; | |
654 | ||
655 | int optionssize = 0; | |
656 | /* Sending MSS option */ | |
657 | union all_known_options *options; | |
658 | ||
659 | if (!cm_node) | |
660 | return -EINVAL; | |
661 | ||
662 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
663 | options->as_mss.optionnum = OPTION_NUMBER_MSS; | |
664 | options->as_mss.length = sizeof(struct option_mss); | |
665 | options->as_mss.mss = htons(cm_node->tcp_cntxt.mss); | |
666 | optionssize += sizeof(struct option_mss); | |
667 | ||
668 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
669 | options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE; | |
670 | options->as_windowscale.length = sizeof(struct option_windowscale); | |
671 | options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; | |
672 | optionssize += sizeof(struct option_windowscale); | |
673 | ||
674 | if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt) | |
675 | ) { | |
676 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
677 | options->as_base.optionnum = OPTION_NUMBER_WRITE0; | |
678 | options->as_base.length = sizeof(struct option_base); | |
679 | optionssize += sizeof(struct option_base); | |
680 | /* we need the size to be a multiple of 4 */ | |
681 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
682 | options->as_end = 1; | |
683 | optionssize += 1; | |
684 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
685 | options->as_end = 1; | |
686 | optionssize += 1; | |
687 | } | |
688 | ||
689 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
690 | options->as_end = OPTION_NUMBER_END; | |
691 | optionssize += 1; | |
692 | ||
693 | skb = get_free_pkt(cm_node); | |
694 | if (!skb) { | |
695 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
696 | return -1; | |
697 | } | |
698 | ||
699 | if (sendack) | |
700 | flags |= SET_ACK; | |
701 | ||
702 | form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags); | |
703 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
704 | ||
705 | return ret; | |
706 | } | |
707 | ||
708 | ||
709 | /** | |
710 | * send_reset | |
711 | */ | |
712 | int send_reset(struct nes_cm_node *cm_node) | |
713 | { | |
714 | int ret; | |
715 | struct sk_buff *skb = get_free_pkt(cm_node); | |
716 | int flags = SET_RST | SET_ACK; | |
717 | ||
718 | if (!skb) { | |
719 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
720 | return -1; | |
721 | } | |
722 | ||
723 | add_ref_cm_node(cm_node); | |
724 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags); | |
725 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1); | |
726 | ||
727 | return ret; | |
728 | } | |
729 | ||
730 | ||
731 | /** | |
732 | * send_ack | |
733 | */ | |
734 | int send_ack(struct nes_cm_node *cm_node) | |
735 | { | |
736 | int ret; | |
737 | struct sk_buff *skb = get_free_pkt(cm_node); | |
738 | ||
739 | if (!skb) { | |
740 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
741 | return -1; | |
742 | } | |
743 | ||
744 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK); | |
745 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0); | |
746 | ||
747 | return ret; | |
748 | } | |
749 | ||
750 | ||
751 | /** | |
752 | * send_fin | |
753 | */ | |
754 | int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb) | |
755 | { | |
756 | int ret; | |
757 | ||
758 | /* if we didn't get a frame get one */ | |
759 | if (!skb) | |
760 | skb = get_free_pkt(cm_node); | |
761 | ||
762 | if (!skb) { | |
763 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
764 | return -1; | |
765 | } | |
766 | ||
767 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN); | |
768 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
769 | ||
770 | return ret; | |
771 | } | |
772 | ||
773 | ||
774 | /** | |
775 | * get_free_pkt | |
776 | */ | |
777 | struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node) | |
778 | { | |
779 | struct sk_buff *skb, *new_skb; | |
780 | ||
781 | /* check to see if we need to repopulate the free tx pkt queue */ | |
782 | if (skb_queue_len(&cm_node->cm_core->tx_free_list) < NES_CM_FREE_PKT_LO_WATERMARK) { | |
783 | while (skb_queue_len(&cm_node->cm_core->tx_free_list) < | |
784 | cm_node->cm_core->free_tx_pkt_max) { | |
785 | /* replace the frame we took, we won't get it back */ | |
786 | new_skb = dev_alloc_skb(cm_node->cm_core->mtu); | |
787 | BUG_ON(!new_skb); | |
788 | /* add a replacement frame to the free tx list head */ | |
789 | skb_queue_head(&cm_node->cm_core->tx_free_list, new_skb); | |
790 | } | |
791 | } | |
792 | ||
793 | skb = skb_dequeue(&cm_node->cm_core->tx_free_list); | |
794 | ||
795 | return skb; | |
796 | } | |
797 | ||
798 | ||
799 | /** | |
800 | * make_hashkey - generate hash key from node tuple | |
801 | */ | |
802 | static inline int make_hashkey(u16 loc_port, nes_addr_t loc_addr, u16 rem_port, | |
803 | nes_addr_t rem_addr) | |
804 | { | |
805 | u32 hashkey = 0; | |
806 | ||
807 | hashkey = loc_addr + rem_addr + loc_port + rem_port; | |
808 | hashkey = (hashkey % NES_CM_HASHTABLE_SIZE); | |
809 | ||
810 | return hashkey; | |
811 | } | |
812 | ||
813 | ||
814 | /** | |
815 | * find_node - find a cm node that matches the reference cm node | |
816 | */ | |
817 | static struct nes_cm_node *find_node(struct nes_cm_core *cm_core, | |
818 | u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr) | |
819 | { | |
820 | unsigned long flags; | |
821 | u32 hashkey; | |
822 | struct list_head *list_pos; | |
823 | struct list_head *hte; | |
824 | struct nes_cm_node *cm_node; | |
825 | ||
826 | /* make a hash index key for this packet */ | |
827 | hashkey = make_hashkey(loc_port, loc_addr, rem_port, rem_addr); | |
828 | ||
829 | /* get a handle on the hte */ | |
830 | hte = &cm_core->connected_nodes; | |
831 | ||
832 | nes_debug(NES_DBG_CM, "Searching for an owner node:%x:%x from core %p->%p\n", | |
833 | loc_addr, loc_port, cm_core, hte); | |
834 | ||
835 | /* walk list and find cm_node associated with this session ID */ | |
836 | spin_lock_irqsave(&cm_core->ht_lock, flags); | |
837 | list_for_each(list_pos, hte) { | |
838 | cm_node = container_of(list_pos, struct nes_cm_node, list); | |
839 | /* compare quad, return node handle if a match */ | |
840 | nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n", | |
841 | cm_node->loc_addr, cm_node->loc_port, | |
842 | loc_addr, loc_port, | |
843 | cm_node->rem_addr, cm_node->rem_port, | |
844 | rem_addr, rem_port); | |
845 | if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) && | |
846 | (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) { | |
847 | add_ref_cm_node(cm_node); | |
848 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
849 | return cm_node; | |
850 | } | |
851 | } | |
852 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
853 | ||
854 | /* no owner node */ | |
855 | return NULL; | |
856 | } | |
857 | ||
858 | ||
859 | /** | |
860 | * find_listener - find a cm node listening on this addr-port pair | |
861 | */ | |
862 | static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core, | |
863 | nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state) | |
864 | { | |
865 | unsigned long flags; | |
866 | struct list_head *listen_list; | |
867 | struct nes_cm_listener *listen_node; | |
868 | ||
869 | /* walk list and find cm_node associated with this session ID */ | |
870 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); | |
871 | list_for_each(listen_list, &cm_core->listen_list.list) { | |
872 | listen_node = container_of(listen_list, struct nes_cm_listener, list); | |
873 | /* compare node pair, return node handle if a match */ | |
874 | if (((listen_node->loc_addr == dst_addr) || | |
875 | listen_node->loc_addr == 0x00000000) && | |
876 | (listen_node->loc_port == dst_port) && | |
877 | (listener_state & listen_node->listener_state)) { | |
878 | atomic_inc(&listen_node->ref_count); | |
879 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
880 | return listen_node; | |
881 | } | |
882 | } | |
883 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
884 | ||
885 | nes_debug(NES_DBG_CM, "Unable to find listener- %x:%x\n", | |
886 | dst_addr, dst_port); | |
887 | ||
888 | /* no listener */ | |
889 | return NULL; | |
890 | } | |
891 | ||
892 | ||
893 | /** | |
894 | * add_hte_node - add a cm node to the hash table | |
895 | */ | |
896 | static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node) | |
897 | { | |
898 | unsigned long flags; | |
899 | u32 hashkey; | |
900 | struct list_head *hte; | |
901 | ||
902 | if (!cm_node || !cm_core) | |
903 | return -EINVAL; | |
904 | ||
905 | nes_debug(NES_DBG_CM, "Adding Node to Active Connection HT\n"); | |
906 | ||
907 | /* first, make an index into our hash table */ | |
908 | hashkey = make_hashkey(cm_node->loc_port, cm_node->loc_addr, | |
909 | cm_node->rem_port, cm_node->rem_addr); | |
910 | cm_node->hashkey = hashkey; | |
911 | ||
912 | spin_lock_irqsave(&cm_core->ht_lock, flags); | |
913 | ||
914 | /* get a handle on the hash table element (list head for this slot) */ | |
915 | hte = &cm_core->connected_nodes; | |
916 | list_add_tail(&cm_node->list, hte); | |
917 | atomic_inc(&cm_core->ht_node_cnt); | |
918 | ||
919 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
920 | ||
921 | return 0; | |
922 | } | |
923 | ||
924 | ||
925 | /** | |
926 | * mini_cm_dec_refcnt_listen | |
927 | */ | |
928 | static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core, | |
929 | struct nes_cm_listener *listener, int free_hanging_nodes) | |
930 | { | |
931 | int ret = 1; | |
932 | unsigned long flags; | |
933 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); | |
934 | if (!atomic_dec_return(&listener->ref_count)) { | |
935 | list_del(&listener->list); | |
936 | ||
937 | /* decrement our listen node count */ | |
938 | atomic_dec(&cm_core->listen_node_cnt); | |
939 | ||
940 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
941 | ||
942 | if (listener->nesvnic) { | |
943 | nes_manage_apbvt(listener->nesvnic, listener->loc_port, | |
944 | PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL); | |
945 | } | |
946 | ||
947 | nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener); | |
948 | ||
949 | kfree(listener); | |
950 | ret = 0; | |
951 | cm_listens_destroyed++; | |
952 | } else { | |
953 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
954 | } | |
955 | if (listener) { | |
956 | if (atomic_read(&listener->pend_accepts_cnt) > 0) | |
957 | nes_debug(NES_DBG_CM, "destroying listener (%p)" | |
958 | " with non-zero pending accepts=%u\n", | |
959 | listener, atomic_read(&listener->pend_accepts_cnt)); | |
960 | } | |
961 | ||
962 | return ret; | |
963 | } | |
964 | ||
965 | ||
966 | /** | |
967 | * mini_cm_del_listen | |
968 | */ | |
969 | static int mini_cm_del_listen(struct nes_cm_core *cm_core, | |
970 | struct nes_cm_listener *listener) | |
971 | { | |
972 | listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE; | |
973 | listener->cm_id = NULL; /* going to be destroyed pretty soon */ | |
974 | return mini_cm_dec_refcnt_listen(cm_core, listener, 1); | |
975 | } | |
976 | ||
977 | ||
978 | /** | |
979 | * mini_cm_accelerated | |
980 | */ | |
981 | static inline int mini_cm_accelerated(struct nes_cm_core *cm_core, | |
982 | struct nes_cm_node *cm_node) | |
983 | { | |
984 | u32 was_timer_set; | |
985 | cm_node->accelerated = 1; | |
986 | ||
987 | if (cm_node->accept_pend) { | |
988 | BUG_ON(!cm_node->listener); | |
989 | atomic_dec(&cm_node->listener->pend_accepts_cnt); | |
990 | BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0); | |
991 | } | |
992 | ||
993 | was_timer_set = timer_pending(&cm_core->tcp_timer); | |
994 | if (!was_timer_set) { | |
995 | cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME; | |
996 | add_timer(&cm_core->tcp_timer); | |
997 | } | |
998 | ||
999 | return 0; | |
1000 | } | |
1001 | ||
1002 | ||
1003 | /** | |
1004 | * nes_addr_send_arp | |
1005 | */ | |
1006 | static void nes_addr_send_arp(u32 dst_ip) | |
1007 | { | |
1008 | struct rtable *rt; | |
1009 | struct flowi fl; | |
1010 | ||
1011 | memset(&fl, 0, sizeof fl); | |
1012 | fl.nl_u.ip4_u.daddr = htonl(dst_ip); | |
1013 | if (ip_route_output_key(&init_net, &rt, &fl)) { | |
1014 | printk("%s: ip_route_output_key failed for 0x%08X\n", | |
1015 | __FUNCTION__, dst_ip); | |
1016 | return; | |
1017 | } | |
1018 | ||
1019 | neigh_event_send(rt->u.dst.neighbour, NULL); | |
1020 | ip_rt_put(rt); | |
1021 | } | |
1022 | ||
1023 | ||
1024 | /** | |
1025 | * make_cm_node - create a new instance of a cm node | |
1026 | */ | |
1027 | static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core, | |
1028 | struct nes_vnic *nesvnic, struct nes_cm_info *cm_info, | |
1029 | struct nes_cm_listener *listener) | |
1030 | { | |
1031 | struct nes_cm_node *cm_node; | |
1032 | struct timespec ts; | |
1033 | int arpindex = 0; | |
1034 | struct nes_device *nesdev; | |
1035 | struct nes_adapter *nesadapter; | |
1036 | ||
1037 | /* create an hte and cm_node for this instance */ | |
1038 | cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); | |
1039 | if (!cm_node) | |
1040 | return NULL; | |
1041 | ||
1042 | /* set our node specific transport info */ | |
1043 | cm_node->loc_addr = cm_info->loc_addr; | |
1044 | cm_node->rem_addr = cm_info->rem_addr; | |
1045 | cm_node->loc_port = cm_info->loc_port; | |
1046 | cm_node->rem_port = cm_info->rem_port; | |
1047 | cm_node->send_write0 = send_first; | |
1048 | nes_debug(NES_DBG_CM, "Make node addresses : loc = %x:%x, rem = %x:%x\n", | |
1049 | cm_node->loc_addr, cm_node->loc_port, cm_node->rem_addr, cm_node->rem_port); | |
1050 | cm_node->listener = listener; | |
1051 | cm_node->netdev = nesvnic->netdev; | |
1052 | cm_node->cm_id = cm_info->cm_id; | |
1053 | memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN); | |
1054 | ||
1055 | nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", | |
1056 | cm_node->listener, cm_node->cm_id); | |
1057 | ||
1058 | INIT_LIST_HEAD(&cm_node->retrans_list); | |
1059 | spin_lock_init(&cm_node->retrans_list_lock); | |
1060 | INIT_LIST_HEAD(&cm_node->recv_list); | |
1061 | spin_lock_init(&cm_node->recv_list_lock); | |
1062 | ||
1063 | cm_node->loopbackpartner = NULL; | |
1064 | atomic_set(&cm_node->ref_count, 1); | |
1065 | /* associate our parent CM core */ | |
1066 | cm_node->cm_core = cm_core; | |
1067 | cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID; | |
1068 | cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE; | |
1069 | cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >> | |
1070 | NES_CM_DEFAULT_RCV_WND_SCALE; | |
1071 | ts = current_kernel_time(); | |
1072 | cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec); | |
1073 | cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) - | |
1074 | sizeof(struct tcphdr) - ETH_HLEN; | |
1075 | cm_node->tcp_cntxt.rcv_nxt = 0; | |
1076 | /* get a unique session ID , add thread_id to an upcounter to handle race */ | |
1077 | atomic_inc(&cm_core->node_cnt); | |
1078 | atomic_inc(&cm_core->session_id); | |
1079 | cm_node->session_id = (u32)(atomic_read(&cm_core->session_id) + current->tgid); | |
1080 | cm_node->conn_type = cm_info->conn_type; | |
1081 | cm_node->apbvt_set = 0; | |
1082 | cm_node->accept_pend = 0; | |
1083 | ||
1084 | cm_node->nesvnic = nesvnic; | |
1085 | /* get some device handles, for arp lookup */ | |
1086 | nesdev = nesvnic->nesdev; | |
1087 | nesadapter = nesdev->nesadapter; | |
1088 | ||
1089 | cm_node->loopbackpartner = NULL; | |
1090 | /* get the mac addr for the remote node */ | |
1091 | arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE); | |
1092 | if (arpindex < 0) { | |
1093 | kfree(cm_node); | |
1094 | nes_addr_send_arp(cm_info->rem_addr); | |
1095 | return NULL; | |
1096 | } | |
1097 | ||
1098 | /* copy the mac addr to node context */ | |
1099 | memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN); | |
1100 | nes_debug(NES_DBG_CM, "Remote mac addr from arp table:%02x," | |
1101 | " %02x, %02x, %02x, %02x, %02x\n", | |
1102 | cm_node->rem_mac[0], cm_node->rem_mac[1], | |
1103 | cm_node->rem_mac[2], cm_node->rem_mac[3], | |
1104 | cm_node->rem_mac[4], cm_node->rem_mac[5]); | |
1105 | ||
1106 | add_hte_node(cm_core, cm_node); | |
1107 | atomic_inc(&cm_nodes_created); | |
1108 | ||
1109 | return cm_node; | |
1110 | } | |
1111 | ||
1112 | ||
1113 | /** | |
1114 | * add_ref_cm_node - destroy an instance of a cm node | |
1115 | */ | |
1116 | static int add_ref_cm_node(struct nes_cm_node *cm_node) | |
1117 | { | |
1118 | atomic_inc(&cm_node->ref_count); | |
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | ||
1123 | /** | |
1124 | * rem_ref_cm_node - destroy an instance of a cm node | |
1125 | */ | |
1126 | static int rem_ref_cm_node(struct nes_cm_core *cm_core, | |
1127 | struct nes_cm_node *cm_node) | |
1128 | { | |
1129 | unsigned long flags, qplockflags; | |
1130 | struct nes_timer_entry *send_entry; | |
1131 | struct nes_timer_entry *recv_entry; | |
1132 | struct iw_cm_id *cm_id; | |
1133 | struct list_head *list_core, *list_node_temp; | |
1134 | struct nes_qp *nesqp; | |
1135 | ||
1136 | if (!cm_node) | |
1137 | return -EINVAL; | |
1138 | ||
1139 | spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags); | |
1140 | if (atomic_dec_return(&cm_node->ref_count)) { | |
1141 | spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); | |
1142 | return 0; | |
1143 | } | |
1144 | list_del(&cm_node->list); | |
1145 | atomic_dec(&cm_core->ht_node_cnt); | |
1146 | spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); | |
1147 | ||
1148 | /* if the node is destroyed before connection was accelerated */ | |
1149 | if (!cm_node->accelerated && cm_node->accept_pend) { | |
1150 | BUG_ON(!cm_node->listener); | |
1151 | atomic_dec(&cm_node->listener->pend_accepts_cnt); | |
1152 | BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0); | |
1153 | } | |
1154 | ||
1155 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
1156 | list_for_each_safe(list_core, list_node_temp, &cm_node->retrans_list) { | |
1157 | send_entry = container_of(list_core, struct nes_timer_entry, list); | |
1158 | list_del(&send_entry->list); | |
1159 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
1160 | dev_kfree_skb_any(send_entry->skb); | |
1161 | kfree(send_entry); | |
1162 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
1163 | continue; | |
1164 | } | |
1165 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
1166 | ||
1167 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
1168 | list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) { | |
1169 | recv_entry = container_of(list_core, struct nes_timer_entry, list); | |
1170 | list_del(&recv_entry->list); | |
1171 | cm_id = cm_node->cm_id; | |
1172 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
1173 | if (recv_entry->type == NES_TIMER_TYPE_CLOSE) { | |
1174 | nesqp = (struct nes_qp *)recv_entry->skb; | |
1175 | spin_lock_irqsave(&nesqp->lock, qplockflags); | |
1176 | if (nesqp->cm_id) { | |
1177 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: ****** HIT A NES_TIMER_TYPE_CLOSE" | |
1178 | " with something to do!!! ******\n", | |
1179 | nesqp->hwqp.qp_id, cm_id); | |
1180 | nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED; | |
1181 | nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT; | |
1182 | nesqp->ibqp_state = IB_QPS_ERR; | |
1183 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); | |
1184 | nes_cm_disconn(nesqp); | |
1185 | } else { | |
1186 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); | |
1187 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: ****** HIT A NES_TIMER_TYPE_CLOSE" | |
1188 | " with nothing to do!!! ******\n", | |
1189 | nesqp->hwqp.qp_id, cm_id); | |
1190 | nes_rem_ref(&nesqp->ibqp); | |
1191 | } | |
1192 | cm_id->rem_ref(cm_id); | |
1193 | } else if (recv_entry->type == NES_TIMER_TYPE_RECV) { | |
1194 | dev_kfree_skb_any(recv_entry->skb); | |
1195 | } | |
1196 | kfree(recv_entry); | |
1197 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
1198 | } | |
1199 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
1200 | ||
1201 | if (cm_node->listener) { | |
1202 | mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0); | |
1203 | } else { | |
1204 | if (cm_node->apbvt_set && cm_node->nesvnic) { | |
1205 | nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port, | |
1206 | PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn), | |
1207 | NES_MANAGE_APBVT_DEL); | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | kfree(cm_node); | |
1212 | atomic_dec(&cm_core->node_cnt); | |
1213 | atomic_inc(&cm_nodes_destroyed); | |
1214 | ||
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | ||
1219 | /** | |
1220 | * process_options | |
1221 | */ | |
1222 | static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc, u32 optionsize, u32 syn_packet) | |
1223 | { | |
1224 | u32 tmp; | |
1225 | u32 offset = 0; | |
1226 | union all_known_options *all_options; | |
1227 | char got_mss_option = 0; | |
1228 | ||
1229 | while (offset < optionsize) { | |
1230 | all_options = (union all_known_options *)(optionsloc + offset); | |
1231 | switch (all_options->as_base.optionnum) { | |
1232 | case OPTION_NUMBER_END: | |
1233 | offset = optionsize; | |
1234 | break; | |
1235 | case OPTION_NUMBER_NONE: | |
1236 | offset += 1; | |
1237 | continue; | |
1238 | case OPTION_NUMBER_MSS: | |
1239 | nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d Size: %d\n", | |
1240 | __FUNCTION__, | |
1241 | all_options->as_mss.length, offset, optionsize); | |
1242 | got_mss_option = 1; | |
1243 | if (all_options->as_mss.length != 4) { | |
1244 | return 1; | |
1245 | } else { | |
1246 | tmp = ntohs(all_options->as_mss.mss); | |
1247 | if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss) | |
1248 | cm_node->tcp_cntxt.mss = tmp; | |
1249 | } | |
1250 | break; | |
1251 | case OPTION_NUMBER_WINDOW_SCALE: | |
1252 | cm_node->tcp_cntxt.snd_wscale = all_options->as_windowscale.shiftcount; | |
1253 | break; | |
1254 | case OPTION_NUMBER_WRITE0: | |
1255 | cm_node->send_write0 = 1; | |
1256 | break; | |
1257 | default: | |
1258 | nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n", | |
1259 | all_options->as_base.optionnum); | |
1260 | break; | |
1261 | } | |
1262 | offset += all_options->as_base.length; | |
1263 | } | |
1264 | if ((!got_mss_option) && (syn_packet)) | |
1265 | cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS; | |
1266 | return 0; | |
1267 | } | |
1268 | ||
1269 | ||
1270 | /** | |
1271 | * process_packet | |
1272 | */ | |
1273 | int process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb, | |
1274 | struct nes_cm_core *cm_core) | |
1275 | { | |
1276 | int optionsize; | |
1277 | int datasize; | |
1278 | int ret = 0; | |
1279 | struct tcphdr *tcph = tcp_hdr(skb); | |
1280 | u32 inc_sequence; | |
1281 | if (cm_node->state == NES_CM_STATE_SYN_SENT && tcph->syn) { | |
1282 | inc_sequence = ntohl(tcph->seq); | |
1283 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence; | |
1284 | } | |
1285 | ||
1286 | if ((!tcph) || (cm_node->state == NES_CM_STATE_TSA)) { | |
1287 | BUG_ON(!tcph); | |
1288 | atomic_inc(&cm_accel_dropped_pkts); | |
1289 | return -1; | |
1290 | } | |
1291 | ||
1292 | if (tcph->rst) { | |
1293 | atomic_inc(&cm_resets_recvd); | |
1294 | nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u. refcnt=%d\n", | |
1295 | cm_node, cm_node->state, atomic_read(&cm_node->ref_count)); | |
1296 | switch (cm_node->state) { | |
1297 | case NES_CM_STATE_LISTENING: | |
1298 | rem_ref_cm_node(cm_core, cm_node); | |
1299 | break; | |
1300 | case NES_CM_STATE_TSA: | |
1301 | case NES_CM_STATE_CLOSED: | |
1302 | break; | |
1303 | case NES_CM_STATE_SYN_RCVD: | |
1304 | nes_debug(NES_DBG_CM, "Received a reset for local 0x%08X:%04X," | |
1305 | " remote 0x%08X:%04X, node state = %u\n", | |
1306 | cm_node->loc_addr, cm_node->loc_port, | |
1307 | cm_node->rem_addr, cm_node->rem_port, | |
1308 | cm_node->state); | |
1309 | rem_ref_cm_node(cm_core, cm_node); | |
1310 | break; | |
1311 | case NES_CM_STATE_ONE_SIDE_ESTABLISHED: | |
1312 | case NES_CM_STATE_ESTABLISHED: | |
1313 | case NES_CM_STATE_MPAREQ_SENT: | |
1314 | default: | |
1315 | nes_debug(NES_DBG_CM, "Received a reset for local 0x%08X:%04X," | |
1316 | " remote 0x%08X:%04X, node state = %u refcnt=%d\n", | |
1317 | cm_node->loc_addr, cm_node->loc_port, | |
1318 | cm_node->rem_addr, cm_node->rem_port, | |
1319 | cm_node->state, atomic_read(&cm_node->ref_count)); | |
1320 | // create event | |
1321 | cm_node->state = NES_CM_STATE_CLOSED; | |
1322 | ||
1323 | create_event(cm_node, NES_CM_EVENT_ABORTED); | |
1324 | break; | |
1325 | ||
1326 | } | |
1327 | return -1; | |
1328 | } | |
1329 | ||
1330 | optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); | |
1331 | ||
1332 | skb_pull(skb, ip_hdr(skb)->ihl << 2); | |
1333 | skb_pull(skb, tcph->doff << 2); | |
1334 | ||
1335 | datasize = skb->len; | |
1336 | inc_sequence = ntohl(tcph->seq); | |
1337 | nes_debug(NES_DBG_CM, "datasize = %u, sequence = 0x%08X, ack_seq = 0x%08X," | |
1338 | " rcv_nxt = 0x%08X Flags: %s %s.\n", | |
1339 | datasize, inc_sequence, ntohl(tcph->ack_seq), | |
1340 | cm_node->tcp_cntxt.rcv_nxt, (tcph->syn ? "SYN":""), | |
1341 | (tcph->ack ? "ACK":"")); | |
1342 | ||
1343 | if (!tcph->syn && (inc_sequence != cm_node->tcp_cntxt.rcv_nxt) | |
1344 | ) { | |
1345 | nes_debug(NES_DBG_CM, "dropping packet, datasize = %u, sequence = 0x%08X," | |
1346 | " ack_seq = 0x%08X, rcv_nxt = 0x%08X Flags: %s.\n", | |
1347 | datasize, inc_sequence, ntohl(tcph->ack_seq), | |
1348 | cm_node->tcp_cntxt.rcv_nxt, (tcph->ack ? "ACK":"")); | |
1349 | if (cm_node->state == NES_CM_STATE_LISTENING) { | |
1350 | rem_ref_cm_node(cm_core, cm_node); | |
1351 | } | |
1352 | return -1; | |
1353 | } | |
1354 | ||
1355 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; | |
1356 | ||
1357 | ||
1358 | if (optionsize) { | |
1359 | u8 *optionsloc = (u8 *)&tcph[1]; | |
1360 | if (process_options(cm_node, optionsloc, optionsize, (u32)tcph->syn)) { | |
1361 | nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n", __FUNCTION__, cm_node); | |
1362 | send_reset(cm_node); | |
1363 | if (cm_node->state != NES_CM_STATE_SYN_SENT) | |
1364 | rem_ref_cm_node(cm_core, cm_node); | |
1365 | return 0; | |
1366 | } | |
1367 | } else if (tcph->syn) | |
1368 | cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS; | |
1369 | ||
1370 | cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) << | |
1371 | cm_node->tcp_cntxt.snd_wscale; | |
1372 | ||
1373 | if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) { | |
1374 | cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; | |
1375 | } | |
1376 | ||
1377 | if (tcph->ack) { | |
1378 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); | |
1379 | switch (cm_node->state) { | |
1380 | case NES_CM_STATE_SYN_RCVD: | |
1381 | case NES_CM_STATE_SYN_SENT: | |
1382 | /* read and stash current sequence number */ | |
1383 | if (cm_node->tcp_cntxt.rem_ack_num != cm_node->tcp_cntxt.loc_seq_num) { | |
1384 | nes_debug(NES_DBG_CM, "ERROR - cm_node->tcp_cntxt.rem_ack_num !=" | |
1385 | " cm_node->tcp_cntxt.loc_seq_num\n"); | |
1386 | send_reset(cm_node); | |
1387 | return 0; | |
1388 | } | |
1389 | if (cm_node->state == NES_CM_STATE_SYN_SENT) | |
1390 | cm_node->state = NES_CM_STATE_ONE_SIDE_ESTABLISHED; | |
1391 | else { | |
1392 | cm_node->state = NES_CM_STATE_ESTABLISHED; | |
1393 | } | |
1394 | break; | |
1395 | case NES_CM_STATE_LAST_ACK: | |
1396 | cm_node->state = NES_CM_STATE_CLOSED; | |
1397 | break; | |
1398 | case NES_CM_STATE_FIN_WAIT1: | |
1399 | cm_node->state = NES_CM_STATE_FIN_WAIT2; | |
1400 | break; | |
1401 | case NES_CM_STATE_CLOSING: | |
1402 | cm_node->state = NES_CM_STATE_TIME_WAIT; | |
1403 | /* need to schedule this to happen in 2MSL timeouts */ | |
1404 | cm_node->state = NES_CM_STATE_CLOSED; | |
1405 | break; | |
1406 | case NES_CM_STATE_ONE_SIDE_ESTABLISHED: | |
1407 | case NES_CM_STATE_ESTABLISHED: | |
1408 | case NES_CM_STATE_MPAREQ_SENT: | |
1409 | case NES_CM_STATE_CLOSE_WAIT: | |
1410 | case NES_CM_STATE_TIME_WAIT: | |
1411 | case NES_CM_STATE_CLOSED: | |
1412 | break; | |
1413 | case NES_CM_STATE_LISTENING: | |
1414 | nes_debug(NES_DBG_CM, "Received an ACK on a listening port (SYN %d)\n", tcph->syn); | |
1415 | cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); | |
1416 | send_reset(cm_node); | |
1417 | /* send_reset bumps refcount, this should have been a new node */ | |
1418 | rem_ref_cm_node(cm_core, cm_node); | |
1419 | return -1; | |
1420 | break; | |
1421 | case NES_CM_STATE_TSA: | |
1422 | nes_debug(NES_DBG_CM, "Received a packet with the ack bit set while in TSA state\n"); | |
1423 | break; | |
1424 | case NES_CM_STATE_UNKNOWN: | |
1425 | case NES_CM_STATE_INITED: | |
1426 | case NES_CM_STATE_ACCEPTING: | |
1427 | case NES_CM_STATE_FIN_WAIT2: | |
1428 | default: | |
1429 | nes_debug(NES_DBG_CM, "Received ack from unknown state: %x\n", | |
1430 | cm_node->state); | |
1431 | send_reset(cm_node); | |
1432 | break; | |
1433 | } | |
1434 | } | |
1435 | ||
1436 | if (tcph->syn) { | |
1437 | if (cm_node->state == NES_CM_STATE_LISTENING) { | |
1438 | /* do not exceed backlog */ | |
1439 | atomic_inc(&cm_node->listener->pend_accepts_cnt); | |
1440 | if (atomic_read(&cm_node->listener->pend_accepts_cnt) > | |
1441 | cm_node->listener->backlog) { | |
1442 | nes_debug(NES_DBG_CM, "drop syn due to backlog pressure \n"); | |
1443 | cm_backlog_drops++; | |
1444 | atomic_dec(&cm_node->listener->pend_accepts_cnt); | |
1445 | rem_ref_cm_node(cm_core, cm_node); | |
1446 | return 0; | |
1447 | } | |
1448 | cm_node->accept_pend = 1; | |
1449 | ||
1450 | } | |
1451 | if (datasize == 0) | |
1452 | cm_node->tcp_cntxt.rcv_nxt ++; | |
1453 | ||
1454 | if (cm_node->state == NES_CM_STATE_LISTENING) { | |
1455 | cm_node->state = NES_CM_STATE_SYN_RCVD; | |
1456 | send_syn(cm_node, 1); | |
1457 | } | |
1458 | if (cm_node->state == NES_CM_STATE_ONE_SIDE_ESTABLISHED) { | |
1459 | cm_node->state = NES_CM_STATE_ESTABLISHED; | |
1460 | /* send final handshake ACK */ | |
1461 | ret = send_ack(cm_node); | |
1462 | if (ret < 0) | |
1463 | return ret; | |
1464 | ||
1465 | cm_node->state = NES_CM_STATE_MPAREQ_SENT; | |
1466 | ret = send_mpa_request(cm_node); | |
1467 | if (ret < 0) | |
1468 | return ret; | |
1469 | } | |
1470 | } | |
1471 | ||
1472 | if (tcph->fin) { | |
1473 | cm_node->tcp_cntxt.rcv_nxt++; | |
1474 | switch (cm_node->state) { | |
1475 | case NES_CM_STATE_SYN_RCVD: | |
1476 | case NES_CM_STATE_SYN_SENT: | |
1477 | case NES_CM_STATE_ONE_SIDE_ESTABLISHED: | |
1478 | case NES_CM_STATE_ESTABLISHED: | |
1479 | case NES_CM_STATE_ACCEPTING: | |
1480 | case NES_CM_STATE_MPAREQ_SENT: | |
1481 | cm_node->state = NES_CM_STATE_CLOSE_WAIT; | |
1482 | cm_node->state = NES_CM_STATE_LAST_ACK; | |
1483 | ret = send_fin(cm_node, NULL); | |
1484 | break; | |
1485 | case NES_CM_STATE_FIN_WAIT1: | |
1486 | cm_node->state = NES_CM_STATE_CLOSING; | |
1487 | ret = send_ack(cm_node); | |
1488 | break; | |
1489 | case NES_CM_STATE_FIN_WAIT2: | |
1490 | cm_node->state = NES_CM_STATE_TIME_WAIT; | |
1491 | cm_node->tcp_cntxt.loc_seq_num ++; | |
1492 | ret = send_ack(cm_node); | |
1493 | /* need to schedule this to happen in 2MSL timeouts */ | |
1494 | cm_node->state = NES_CM_STATE_CLOSED; | |
1495 | break; | |
1496 | case NES_CM_STATE_CLOSE_WAIT: | |
1497 | case NES_CM_STATE_LAST_ACK: | |
1498 | case NES_CM_STATE_CLOSING: | |
1499 | case NES_CM_STATE_TSA: | |
1500 | default: | |
1501 | nes_debug(NES_DBG_CM, "Received a fin while in %x state\n", | |
1502 | cm_node->state); | |
1503 | ret = -EINVAL; | |
1504 | break; | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | if (datasize) { | |
1509 | u8 *dataloc = skb->data; | |
1510 | /* figure out what state we are in and handle transition to next state */ | |
1511 | switch (cm_node->state) { | |
1512 | case NES_CM_STATE_LISTENING: | |
1513 | case NES_CM_STATE_SYN_RCVD: | |
1514 | case NES_CM_STATE_SYN_SENT: | |
1515 | case NES_CM_STATE_FIN_WAIT1: | |
1516 | case NES_CM_STATE_FIN_WAIT2: | |
1517 | case NES_CM_STATE_CLOSE_WAIT: | |
1518 | case NES_CM_STATE_LAST_ACK: | |
1519 | case NES_CM_STATE_CLOSING: | |
1520 | break; | |
1521 | case NES_CM_STATE_MPAREQ_SENT: | |
1522 | /* recv the mpa res frame, ret=frame len (incl priv data) */ | |
1523 | ret = parse_mpa(cm_node, dataloc, datasize); | |
1524 | if (ret < 0) | |
1525 | break; | |
1526 | /* set the req frame payload len in skb */ | |
1527 | /* we are done handling this state, set node to a TSA state */ | |
1528 | cm_node->state = NES_CM_STATE_TSA; | |
1529 | send_ack(cm_node); | |
1530 | create_event(cm_node, NES_CM_EVENT_CONNECTED); | |
1531 | break; | |
1532 | ||
1533 | case NES_CM_STATE_ESTABLISHED: | |
1534 | /* we are expecting an MPA req frame */ | |
1535 | ret = parse_mpa(cm_node, dataloc, datasize); | |
1536 | if (ret < 0) { | |
1537 | break; | |
1538 | } | |
1539 | cm_node->state = NES_CM_STATE_TSA; | |
1540 | send_ack(cm_node); | |
1541 | /* we got a valid MPA request, create an event */ | |
1542 | create_event(cm_node, NES_CM_EVENT_MPA_REQ); | |
1543 | break; | |
1544 | case NES_CM_STATE_TSA: | |
1545 | handle_exception_pkt(cm_node, skb); | |
1546 | break; | |
1547 | case NES_CM_STATE_UNKNOWN: | |
1548 | case NES_CM_STATE_INITED: | |
1549 | default: | |
1550 | ret = -1; | |
1551 | } | |
1552 | } | |
1553 | ||
1554 | return ret; | |
1555 | } | |
1556 | ||
1557 | ||
1558 | /** | |
1559 | * mini_cm_listen - create a listen node with params | |
1560 | */ | |
1561 | static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core, | |
1562 | struct nes_vnic *nesvnic, struct nes_cm_info *cm_info) | |
1563 | { | |
1564 | struct nes_cm_listener *listener; | |
1565 | unsigned long flags; | |
1566 | ||
1567 | nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n", | |
1568 | cm_info->loc_addr, cm_info->loc_port); | |
1569 | ||
1570 | /* cannot have multiple matching listeners */ | |
1571 | listener = find_listener(cm_core, htonl(cm_info->loc_addr), | |
1572 | htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE); | |
1573 | if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) { | |
1574 | /* find automatically incs ref count ??? */ | |
1575 | atomic_dec(&listener->ref_count); | |
1576 | nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n"); | |
1577 | return NULL; | |
1578 | } | |
1579 | ||
1580 | if (!listener) { | |
1581 | /* create a CM listen node (1/2 node to compare incoming traffic to) */ | |
1582 | listener = kzalloc(sizeof(*listener), GFP_ATOMIC); | |
1583 | if (!listener) { | |
1584 | nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n"); | |
1585 | return NULL; | |
1586 | } | |
1587 | ||
1588 | memset(listener, 0, sizeof(struct nes_cm_listener)); | |
1589 | listener->loc_addr = htonl(cm_info->loc_addr); | |
1590 | listener->loc_port = htons(cm_info->loc_port); | |
1591 | listener->reused_node = 0; | |
1592 | ||
1593 | atomic_set(&listener->ref_count, 1); | |
1594 | } | |
1595 | /* pasive case */ | |
1596 | /* find already inc'ed the ref count */ | |
1597 | else { | |
1598 | listener->reused_node = 1; | |
1599 | } | |
1600 | ||
1601 | listener->cm_id = cm_info->cm_id; | |
1602 | atomic_set(&listener->pend_accepts_cnt, 0); | |
1603 | listener->cm_core = cm_core; | |
1604 | listener->nesvnic = nesvnic; | |
1605 | atomic_inc(&cm_core->node_cnt); | |
1606 | atomic_inc(&cm_core->session_id); | |
1607 | ||
1608 | listener->session_id = (u32)(atomic_read(&cm_core->session_id) + current->tgid); | |
1609 | listener->conn_type = cm_info->conn_type; | |
1610 | listener->backlog = cm_info->backlog; | |
1611 | listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE; | |
1612 | ||
1613 | if (!listener->reused_node) { | |
1614 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); | |
1615 | list_add(&listener->list, &cm_core->listen_list.list); | |
1616 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
1617 | atomic_inc(&cm_core->listen_node_cnt); | |
1618 | } | |
1619 | ||
1620 | nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x," | |
1621 | " listener = %p, backlog = %d, cm_id = %p.\n", | |
1622 | cm_info->loc_addr, cm_info->loc_port, | |
1623 | listener, listener->backlog, listener->cm_id); | |
1624 | ||
1625 | return listener; | |
1626 | } | |
1627 | ||
1628 | ||
1629 | /** | |
1630 | * mini_cm_connect - make a connection node with params | |
1631 | */ | |
1632 | struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core, | |
1633 | struct nes_vnic *nesvnic, struct ietf_mpa_frame *mpa_frame, | |
1634 | struct nes_cm_info *cm_info) | |
1635 | { | |
1636 | int ret = 0; | |
1637 | struct nes_cm_node *cm_node; | |
1638 | struct nes_cm_listener *loopbackremotelistener; | |
1639 | struct nes_cm_node *loopbackremotenode; | |
1640 | struct nes_cm_info loopback_cm_info; | |
1641 | ||
1642 | u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + | |
1643 | ntohs(mpa_frame->priv_data_len); | |
1644 | ||
1645 | cm_info->loc_addr = htonl(cm_info->loc_addr); | |
1646 | cm_info->rem_addr = htonl(cm_info->rem_addr); | |
1647 | cm_info->loc_port = htons(cm_info->loc_port); | |
1648 | cm_info->rem_port = htons(cm_info->rem_port); | |
1649 | ||
1650 | /* create a CM connection node */ | |
1651 | cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL); | |
1652 | if (!cm_node) | |
1653 | return NULL; | |
1654 | ||
1655 | // set our node side to client (active) side | |
1656 | cm_node->tcp_cntxt.client = 1; | |
1657 | cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE; | |
1658 | ||
1659 | if (cm_info->loc_addr == cm_info->rem_addr) { | |
1660 | loopbackremotelistener = find_listener(cm_core, cm_node->rem_addr, | |
1661 | cm_node->rem_port, NES_CM_LISTENER_ACTIVE_STATE); | |
1662 | if (loopbackremotelistener == NULL) { | |
1663 | create_event(cm_node, NES_CM_EVENT_ABORTED); | |
1664 | } else { | |
1665 | atomic_inc(&cm_loopbacks); | |
1666 | loopback_cm_info = *cm_info; | |
1667 | loopback_cm_info.loc_port = cm_info->rem_port; | |
1668 | loopback_cm_info.rem_port = cm_info->loc_port; | |
1669 | loopback_cm_info.cm_id = loopbackremotelistener->cm_id; | |
1670 | loopbackremotenode = make_cm_node(cm_core, nesvnic, &loopback_cm_info, | |
1671 | loopbackremotelistener); | |
1672 | loopbackremotenode->loopbackpartner = cm_node; | |
1673 | loopbackremotenode->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE; | |
1674 | cm_node->loopbackpartner = loopbackremotenode; | |
1675 | memcpy(loopbackremotenode->mpa_frame_buf, &mpa_frame->priv_data, | |
1676 | mpa_frame_size); | |
1677 | loopbackremotenode->mpa_frame_size = mpa_frame_size - | |
1678 | sizeof(struct ietf_mpa_frame); | |
1679 | ||
1680 | // we are done handling this state, set node to a TSA state | |
1681 | cm_node->state = NES_CM_STATE_TSA; | |
1682 | cm_node->tcp_cntxt.rcv_nxt = loopbackremotenode->tcp_cntxt.loc_seq_num; | |
1683 | loopbackremotenode->tcp_cntxt.rcv_nxt = cm_node->tcp_cntxt.loc_seq_num; | |
1684 | cm_node->tcp_cntxt.max_snd_wnd = loopbackremotenode->tcp_cntxt.rcv_wnd; | |
1685 | loopbackremotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd; | |
1686 | cm_node->tcp_cntxt.snd_wnd = loopbackremotenode->tcp_cntxt.rcv_wnd; | |
1687 | loopbackremotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd; | |
1688 | cm_node->tcp_cntxt.snd_wscale = loopbackremotenode->tcp_cntxt.rcv_wscale; | |
1689 | loopbackremotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale; | |
1690 | ||
1691 | create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ); | |
1692 | } | |
1693 | return cm_node; | |
1694 | } | |
1695 | ||
1696 | /* set our node side to client (active) side */ | |
1697 | cm_node->tcp_cntxt.client = 1; | |
1698 | /* init our MPA frame ptr */ | |
1699 | memcpy(&cm_node->mpa_frame, mpa_frame, mpa_frame_size); | |
1700 | cm_node->mpa_frame_size = mpa_frame_size; | |
1701 | ||
1702 | /* send a syn and goto syn sent state */ | |
1703 | cm_node->state = NES_CM_STATE_SYN_SENT; | |
1704 | ret = send_syn(cm_node, 0); | |
1705 | ||
1706 | nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X, port=0x%04x," | |
1707 | " cm_node=%p, cm_id = %p.\n", | |
1708 | cm_node->rem_addr, cm_node->rem_port, cm_node, cm_node->cm_id); | |
1709 | ||
1710 | return cm_node; | |
1711 | } | |
1712 | ||
1713 | ||
1714 | /** | |
1715 | * mini_cm_accept - accept a connection | |
1716 | * This function is never called | |
1717 | */ | |
1718 | int mini_cm_accept(struct nes_cm_core *cm_core, struct ietf_mpa_frame *mpa_frame, | |
1719 | struct nes_cm_node *cm_node) | |
1720 | { | |
1721 | return 0; | |
1722 | } | |
1723 | ||
1724 | ||
1725 | /** | |
1726 | * mini_cm_reject - reject and teardown a connection | |
1727 | */ | |
1728 | int mini_cm_reject(struct nes_cm_core *cm_core, | |
1729 | struct ietf_mpa_frame *mpa_frame, | |
1730 | struct nes_cm_node *cm_node) | |
1731 | { | |
1732 | int ret = 0; | |
1733 | struct sk_buff *skb; | |
1734 | u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + | |
1735 | ntohs(mpa_frame->priv_data_len); | |
1736 | ||
1737 | skb = get_free_pkt(cm_node); | |
1738 | if (!skb) { | |
1739 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
1740 | return -1; | |
1741 | } | |
1742 | ||
1743 | /* send an MPA Request frame */ | |
1744 | form_cm_frame(skb, cm_node, NULL, 0, mpa_frame, mpa_frame_size, SET_ACK | SET_FIN); | |
1745 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
1746 | ||
1747 | cm_node->state = NES_CM_STATE_CLOSED; | |
1748 | ret = send_fin(cm_node, NULL); | |
1749 | ||
1750 | if (ret < 0) { | |
1751 | printk(KERN_INFO PFX "failed to send MPA Reply (reject)\n"); | |
1752 | return ret; | |
1753 | } | |
1754 | ||
1755 | return ret; | |
1756 | } | |
1757 | ||
1758 | ||
1759 | /** | |
1760 | * mini_cm_close | |
1761 | */ | |
1762 | int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node) | |
1763 | { | |
1764 | int ret = 0; | |
1765 | ||
1766 | if (!cm_core || !cm_node) | |
1767 | return -EINVAL; | |
1768 | ||
1769 | switch (cm_node->state) { | |
1770 | /* if passed in node is null, create a reference key node for node search */ | |
1771 | /* check if we found an owner node for this pkt */ | |
1772 | case NES_CM_STATE_SYN_RCVD: | |
1773 | case NES_CM_STATE_SYN_SENT: | |
1774 | case NES_CM_STATE_ONE_SIDE_ESTABLISHED: | |
1775 | case NES_CM_STATE_ESTABLISHED: | |
1776 | case NES_CM_STATE_ACCEPTING: | |
1777 | case NES_CM_STATE_MPAREQ_SENT: | |
1778 | cm_node->state = NES_CM_STATE_FIN_WAIT1; | |
1779 | send_fin(cm_node, NULL); | |
1780 | break; | |
1781 | case NES_CM_STATE_CLOSE_WAIT: | |
1782 | cm_node->state = NES_CM_STATE_LAST_ACK; | |
1783 | send_fin(cm_node, NULL); | |
1784 | break; | |
1785 | case NES_CM_STATE_FIN_WAIT1: | |
1786 | case NES_CM_STATE_FIN_WAIT2: | |
1787 | case NES_CM_STATE_LAST_ACK: | |
1788 | case NES_CM_STATE_TIME_WAIT: | |
1789 | case NES_CM_STATE_CLOSING: | |
1790 | ret = -1; | |
1791 | break; | |
1792 | case NES_CM_STATE_LISTENING: | |
1793 | case NES_CM_STATE_UNKNOWN: | |
1794 | case NES_CM_STATE_INITED: | |
1795 | case NES_CM_STATE_CLOSED: | |
1796 | case NES_CM_STATE_TSA: | |
1797 | ret = rem_ref_cm_node(cm_core, cm_node); | |
1798 | break; | |
1799 | } | |
1800 | cm_node->cm_id = NULL; | |
1801 | return ret; | |
1802 | } | |
1803 | ||
1804 | ||
1805 | /** | |
1806 | * recv_pkt - recv an ETHERNET packet, and process it through CM | |
1807 | * node state machine | |
1808 | */ | |
1809 | int mini_cm_recv_pkt(struct nes_cm_core *cm_core, struct nes_vnic *nesvnic, | |
1810 | struct sk_buff *skb) | |
1811 | { | |
1812 | struct nes_cm_node *cm_node = NULL; | |
1813 | struct nes_cm_listener *listener = NULL; | |
1814 | struct iphdr *iph; | |
1815 | struct tcphdr *tcph; | |
1816 | struct nes_cm_info nfo; | |
1817 | int ret = 0; | |
1818 | ||
1819 | if (!skb || skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) { | |
1820 | ret = -EINVAL; | |
1821 | goto out; | |
1822 | } | |
1823 | ||
1824 | iph = (struct iphdr *)skb->data; | |
1825 | tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr)); | |
1826 | skb_reset_network_header(skb); | |
1827 | skb_set_transport_header(skb, sizeof(*tcph)); | |
1828 | skb->len = ntohs(iph->tot_len); | |
1829 | ||
1830 | nfo.loc_addr = ntohl(iph->daddr); | |
1831 | nfo.loc_port = ntohs(tcph->dest); | |
1832 | nfo.rem_addr = ntohl(iph->saddr); | |
1833 | nfo.rem_port = ntohs(tcph->source); | |
1834 | ||
1835 | nes_debug(NES_DBG_CM, "Received packet: dest=0x%08X:0x%04X src=0x%08X:0x%04X\n", | |
1836 | iph->daddr, tcph->dest, iph->saddr, tcph->source); | |
1837 | ||
1838 | /* note: this call is going to increment cm_node ref count */ | |
1839 | cm_node = find_node(cm_core, | |
1840 | nfo.rem_port, nfo.rem_addr, | |
1841 | nfo.loc_port, nfo.loc_addr); | |
1842 | ||
1843 | if (!cm_node) { | |
1844 | listener = find_listener(cm_core, nfo.loc_addr, nfo.loc_port, | |
1845 | NES_CM_LISTENER_ACTIVE_STATE); | |
1846 | if (listener) { | |
1847 | nfo.cm_id = listener->cm_id; | |
1848 | nfo.conn_type = listener->conn_type; | |
1849 | } else { | |
1850 | nfo.cm_id = NULL; | |
1851 | nfo.conn_type = 0; | |
1852 | } | |
1853 | ||
1854 | cm_node = make_cm_node(cm_core, nesvnic, &nfo, listener); | |
1855 | if (!cm_node) { | |
1856 | nes_debug(NES_DBG_CM, "Unable to allocate node\n"); | |
1857 | if (listener) { | |
1858 | nes_debug(NES_DBG_CM, "unable to allocate node and decrementing listener refcount\n"); | |
1859 | atomic_dec(&listener->ref_count); | |
1860 | } | |
1861 | ret = -1; | |
1862 | goto out; | |
1863 | } | |
1864 | if (!listener) { | |
1865 | nes_debug(NES_DBG_CM, "Packet found for unknown port %x refcnt=%d\n", | |
1866 | nfo.loc_port, atomic_read(&cm_node->ref_count)); | |
1867 | if (!tcph->rst) { | |
1868 | nes_debug(NES_DBG_CM, "Packet found for unknown port=%d" | |
1869 | " rem_port=%d refcnt=%d\n", | |
1870 | nfo.loc_port, nfo.rem_port, atomic_read(&cm_node->ref_count)); | |
1871 | ||
1872 | cm_node->tcp_cntxt.rcv_nxt = ntohl(tcph->seq); | |
1873 | cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); | |
1874 | send_reset(cm_node); | |
1875 | } | |
1876 | rem_ref_cm_node(cm_core, cm_node); | |
1877 | ret = -1; | |
1878 | goto out; | |
1879 | } | |
1880 | add_ref_cm_node(cm_node); | |
1881 | cm_node->state = NES_CM_STATE_LISTENING; | |
1882 | } | |
1883 | ||
1884 | nes_debug(NES_DBG_CM, "Processing Packet for node %p, data = (%p):\n", | |
1885 | cm_node, skb->data); | |
1886 | process_packet(cm_node, skb, cm_core); | |
1887 | ||
1888 | rem_ref_cm_node(cm_core, cm_node); | |
1889 | out: | |
1890 | if (skb) | |
1891 | dev_kfree_skb_any(skb); | |
1892 | return ret; | |
1893 | } | |
1894 | ||
1895 | ||
1896 | /** | |
1897 | * nes_cm_alloc_core - allocate a top level instance of a cm core | |
1898 | */ | |
1899 | struct nes_cm_core *nes_cm_alloc_core(void) | |
1900 | { | |
1901 | int i; | |
1902 | ||
1903 | struct nes_cm_core *cm_core; | |
1904 | struct sk_buff *skb = NULL; | |
1905 | ||
1906 | /* setup the CM core */ | |
1907 | /* alloc top level core control structure */ | |
1908 | cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL); | |
1909 | if (!cm_core) | |
1910 | return NULL; | |
1911 | ||
1912 | INIT_LIST_HEAD(&cm_core->connected_nodes); | |
1913 | init_timer(&cm_core->tcp_timer); | |
1914 | cm_core->tcp_timer.function = nes_cm_timer_tick; | |
1915 | ||
1916 | cm_core->mtu = NES_CM_DEFAULT_MTU; | |
1917 | cm_core->state = NES_CM_STATE_INITED; | |
1918 | cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS; | |
1919 | ||
1920 | atomic_set(&cm_core->session_id, 0); | |
1921 | atomic_set(&cm_core->events_posted, 0); | |
1922 | ||
1923 | /* init the packet lists */ | |
1924 | skb_queue_head_init(&cm_core->tx_free_list); | |
1925 | ||
1926 | for (i = 0; i < NES_CM_DEFAULT_FRAME_CNT; i++) { | |
1927 | skb = dev_alloc_skb(cm_core->mtu); | |
1928 | if (!skb) { | |
1929 | kfree(cm_core); | |
1930 | return NULL; | |
1931 | } | |
1932 | /* add 'raw' skb to free frame list */ | |
1933 | skb_queue_head(&cm_core->tx_free_list, skb); | |
1934 | } | |
1935 | ||
1936 | cm_core->api = &nes_cm_api; | |
1937 | ||
1938 | spin_lock_init(&cm_core->ht_lock); | |
1939 | spin_lock_init(&cm_core->listen_list_lock); | |
1940 | ||
1941 | INIT_LIST_HEAD(&cm_core->listen_list.list); | |
1942 | ||
1943 | nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core); | |
1944 | ||
1945 | nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n"); | |
1946 | cm_core->event_wq = create_singlethread_workqueue("nesewq"); | |
1947 | cm_core->post_event = nes_cm_post_event; | |
1948 | nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n"); | |
1949 | cm_core->disconn_wq = create_singlethread_workqueue("nesdwq"); | |
1950 | ||
1951 | print_core(cm_core); | |
1952 | return cm_core; | |
1953 | } | |
1954 | ||
1955 | ||
1956 | /** | |
1957 | * mini_cm_dealloc_core - deallocate a top level instance of a cm core | |
1958 | */ | |
1959 | int mini_cm_dealloc_core(struct nes_cm_core *cm_core) | |
1960 | { | |
1961 | nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core); | |
1962 | ||
1963 | if (!cm_core) | |
1964 | return -EINVAL; | |
1965 | ||
1966 | barrier(); | |
1967 | ||
1968 | if (timer_pending(&cm_core->tcp_timer)) { | |
1969 | del_timer(&cm_core->tcp_timer); | |
1970 | } | |
1971 | ||
1972 | destroy_workqueue(cm_core->event_wq); | |
1973 | destroy_workqueue(cm_core->disconn_wq); | |
1974 | nes_debug(NES_DBG_CM, "\n"); | |
1975 | kfree(cm_core); | |
1976 | ||
1977 | return 0; | |
1978 | } | |
1979 | ||
1980 | ||
1981 | /** | |
1982 | * mini_cm_get | |
1983 | */ | |
1984 | int mini_cm_get(struct nes_cm_core *cm_core) | |
1985 | { | |
1986 | return cm_core->state; | |
1987 | } | |
1988 | ||
1989 | ||
1990 | /** | |
1991 | * mini_cm_set | |
1992 | */ | |
1993 | int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value) | |
1994 | { | |
1995 | int ret = 0; | |
1996 | ||
1997 | switch (type) { | |
1998 | case NES_CM_SET_PKT_SIZE: | |
1999 | cm_core->mtu = value; | |
2000 | break; | |
2001 | case NES_CM_SET_FREE_PKT_Q_SIZE: | |
2002 | cm_core->free_tx_pkt_max = value; | |
2003 | break; | |
2004 | default: | |
2005 | /* unknown set option */ | |
2006 | ret = -EINVAL; | |
2007 | } | |
2008 | ||
2009 | return ret; | |
2010 | } | |
2011 | ||
2012 | ||
2013 | /** | |
2014 | * nes_cm_init_tsa_conn setup HW; MPA frames must be | |
2015 | * successfully exchanged when this is called | |
2016 | */ | |
2017 | static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node) | |
2018 | { | |
2019 | int ret = 0; | |
2020 | ||
2021 | if (!nesqp) | |
2022 | return -EINVAL; | |
2023 | ||
2024 | nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 | | |
2025 | NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG | | |
2026 | NES_QPCONTEXT_MISC_DROS); | |
2027 | ||
2028 | if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale) | |
2029 | nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE); | |
2030 | ||
2031 | nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT); | |
2032 | ||
2033 | nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16); | |
2034 | ||
2035 | nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32( | |
2036 | (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT); | |
2037 | ||
2038 | nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32( | |
2039 | (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) & | |
2040 | NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK); | |
2041 | ||
2042 | nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32( | |
2043 | (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) & | |
2044 | NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK); | |
2045 | ||
2046 | nesqp->nesqp_context->keepalive = cpu_to_le32(0x80); | |
2047 | nesqp->nesqp_context->ts_recent = 0; | |
2048 | nesqp->nesqp_context->ts_age = 0; | |
2049 | nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2050 | nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd); | |
2051 | nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); | |
2052 | nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd << | |
2053 | cm_node->tcp_cntxt.rcv_wscale); | |
2054 | nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2055 | nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2056 | nesqp->nesqp_context->srtt = 0; | |
2057 | nesqp->nesqp_context->rttvar = cpu_to_le32(0x6); | |
2058 | nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000); | |
2059 | nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss); | |
2060 | nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); | |
2061 | nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2062 | nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd); | |
2063 | ||
2064 | nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X," | |
2065 | " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n", | |
2066 | nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt), | |
2067 | le32_to_cpu(nesqp->nesqp_context->snd_nxt), | |
2068 | cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale), | |
2069 | le32_to_cpu(nesqp->nesqp_context->rcv_wnd), | |
2070 | le32_to_cpu(nesqp->nesqp_context->misc)); | |
2071 | nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd)); | |
2072 | nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd)); | |
2073 | nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd)); | |
2074 | ||
2075 | nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n"); | |
2076 | cm_node->state = NES_CM_STATE_TSA; | |
2077 | ||
2078 | return ret; | |
2079 | } | |
2080 | ||
2081 | ||
2082 | /** | |
2083 | * nes_cm_disconn | |
2084 | */ | |
2085 | int nes_cm_disconn(struct nes_qp *nesqp) | |
2086 | { | |
2087 | unsigned long flags; | |
2088 | ||
2089 | spin_lock_irqsave(&nesqp->lock, flags); | |
2090 | if (nesqp->disconn_pending == 0) { | |
2091 | nesqp->disconn_pending++; | |
2092 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2093 | /* nes_add_ref(&nesqp->ibqp); */ | |
2094 | /* init our disconnect work element, to */ | |
2095 | INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker); | |
2096 | ||
2097 | queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work); | |
2098 | } else { | |
2099 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2100 | nes_rem_ref(&nesqp->ibqp); | |
2101 | } | |
2102 | ||
2103 | return 0; | |
2104 | } | |
2105 | ||
2106 | ||
2107 | /** | |
2108 | * nes_disconnect_worker | |
2109 | */ | |
2110 | void nes_disconnect_worker(struct work_struct *work) | |
2111 | { | |
2112 | struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work); | |
2113 | ||
2114 | nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n", | |
2115 | nesqp->last_aeq, nesqp->hwqp.qp_id); | |
2116 | nes_cm_disconn_true(nesqp); | |
2117 | } | |
2118 | ||
2119 | ||
2120 | /** | |
2121 | * nes_cm_disconn_true | |
2122 | */ | |
2123 | int nes_cm_disconn_true(struct nes_qp *nesqp) | |
2124 | { | |
2125 | unsigned long flags; | |
2126 | int ret = 0; | |
2127 | struct iw_cm_id *cm_id; | |
2128 | struct iw_cm_event cm_event; | |
2129 | struct nes_vnic *nesvnic; | |
2130 | u16 last_ae; | |
2131 | u8 original_hw_tcp_state; | |
2132 | u8 original_ibqp_state; | |
2133 | u8 issued_disconnect_reset = 0; | |
2134 | ||
2135 | if (!nesqp) { | |
2136 | nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n"); | |
2137 | return -1; | |
2138 | } | |
2139 | ||
2140 | spin_lock_irqsave(&nesqp->lock, flags); | |
2141 | cm_id = nesqp->cm_id; | |
2142 | /* make sure we havent already closed this connection */ | |
2143 | if (!cm_id) { | |
2144 | nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n", | |
2145 | nesqp->hwqp.qp_id); | |
2146 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2147 | nes_rem_ref(&nesqp->ibqp); | |
2148 | return -1; | |
2149 | } | |
2150 | ||
2151 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2152 | nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id); | |
2153 | ||
2154 | original_hw_tcp_state = nesqp->hw_tcp_state; | |
2155 | original_ibqp_state = nesqp->ibqp_state; | |
2156 | last_ae = nesqp->last_aeq; | |
2157 | ||
2158 | ||
2159 | nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state); | |
2160 | ||
2161 | if ((nesqp->cm_id) && (cm_id->event_handler)) { | |
2162 | if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) || | |
2163 | ((original_ibqp_state == IB_QPS_RTS) && | |
2164 | (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) { | |
2165 | atomic_inc(&cm_disconnects); | |
2166 | cm_event.event = IW_CM_EVENT_DISCONNECT; | |
2167 | if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) { | |
2168 | issued_disconnect_reset = 1; | |
2169 | cm_event.status = IW_CM_EVENT_STATUS_RESET; | |
2170 | nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event (status reset) for " | |
2171 | " QP%u, cm_id = %p. \n", | |
2172 | nesqp->hwqp.qp_id, cm_id); | |
2173 | } else { | |
2174 | cm_event.status = IW_CM_EVENT_STATUS_OK; | |
2175 | } | |
2176 | ||
2177 | cm_event.local_addr = cm_id->local_addr; | |
2178 | cm_event.remote_addr = cm_id->remote_addr; | |
2179 | cm_event.private_data = NULL; | |
2180 | cm_event.private_data_len = 0; | |
2181 | ||
2182 | nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event for " | |
2183 | " QP%u, SQ Head = %u, SQ Tail = %u. cm_id = %p, refcount = %u.\n", | |
2184 | nesqp->hwqp.qp_id, | |
2185 | nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail, cm_id, | |
2186 | atomic_read(&nesqp->refcount)); | |
2187 | ||
2188 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2189 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2190 | if (ret) | |
2191 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
2192 | spin_lock_irqsave(&nesqp->lock, flags); | |
2193 | } | |
2194 | ||
2195 | nesqp->disconn_pending = 0; | |
2196 | /* There might have been another AE while the lock was released */ | |
2197 | original_hw_tcp_state = nesqp->hw_tcp_state; | |
2198 | original_ibqp_state = nesqp->ibqp_state; | |
2199 | last_ae = nesqp->last_aeq; | |
2200 | ||
2201 | if ((issued_disconnect_reset == 0) && (nesqp->cm_id) && | |
2202 | ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) || | |
2203 | (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) || | |
2204 | (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) || | |
2205 | (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) { | |
2206 | atomic_inc(&cm_closes); | |
2207 | nesqp->cm_id = NULL; | |
2208 | nesqp->in_disconnect = 0; | |
2209 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2210 | nes_disconnect(nesqp, 1); | |
2211 | ||
2212 | cm_id->provider_data = nesqp; | |
2213 | /* Send up the close complete event */ | |
2214 | cm_event.event = IW_CM_EVENT_CLOSE; | |
2215 | cm_event.status = IW_CM_EVENT_STATUS_OK; | |
2216 | cm_event.provider_data = cm_id->provider_data; | |
2217 | cm_event.local_addr = cm_id->local_addr; | |
2218 | cm_event.remote_addr = cm_id->remote_addr; | |
2219 | cm_event.private_data = NULL; | |
2220 | cm_event.private_data_len = 0; | |
2221 | ||
2222 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2223 | if (ret) { | |
2224 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
2225 | } | |
2226 | ||
2227 | cm_id->rem_ref(cm_id); | |
2228 | ||
2229 | spin_lock_irqsave(&nesqp->lock, flags); | |
2230 | if (nesqp->flush_issued == 0) { | |
2231 | nesqp->flush_issued = 1; | |
2232 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2233 | flush_wqes(nesvnic->nesdev, nesqp, NES_CQP_FLUSH_RQ, 1); | |
2234 | } else { | |
2235 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2236 | } | |
2237 | ||
2238 | /* This reference is from either ModifyQP or the AE processing, | |
2239 | there is still a race here with modifyqp */ | |
2240 | nes_rem_ref(&nesqp->ibqp); | |
2241 | ||
2242 | } else { | |
2243 | cm_id = nesqp->cm_id; | |
2244 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2245 | /* check to see if the inbound reset beat the outbound reset */ | |
2246 | if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) { | |
2247 | nes_debug(NES_DBG_CM, "QP%u: Decing refcount due to inbound reset" | |
2248 | " beating the outbound reset.\n", | |
2249 | nesqp->hwqp.qp_id); | |
2250 | nes_rem_ref(&nesqp->ibqp); | |
2251 | } | |
2252 | } | |
2253 | } else { | |
2254 | nesqp->disconn_pending = 0; | |
2255 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2256 | } | |
2257 | nes_rem_ref(&nesqp->ibqp); | |
2258 | ||
2259 | return 0; | |
2260 | } | |
2261 | ||
2262 | ||
2263 | /** | |
2264 | * nes_disconnect | |
2265 | */ | |
2266 | int nes_disconnect(struct nes_qp *nesqp, int abrupt) | |
2267 | { | |
2268 | int ret = 0; | |
2269 | struct nes_vnic *nesvnic; | |
2270 | struct nes_device *nesdev; | |
2271 | ||
2272 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2273 | if (!nesvnic) | |
2274 | return -EINVAL; | |
2275 | ||
2276 | nesdev = nesvnic->nesdev; | |
2277 | ||
2278 | nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n", | |
2279 | atomic_read(&nesvnic->netdev->refcnt)); | |
2280 | ||
2281 | if (nesqp->active_conn) { | |
2282 | ||
2283 | /* indicate this connection is NOT active */ | |
2284 | nesqp->active_conn = 0; | |
2285 | } else { | |
2286 | /* Need to free the Last Streaming Mode Message */ | |
2287 | if (nesqp->ietf_frame) { | |
2288 | pci_free_consistent(nesdev->pcidev, | |
2289 | nesqp->private_data_len+sizeof(struct ietf_mpa_frame), | |
2290 | nesqp->ietf_frame, nesqp->ietf_frame_pbase); | |
2291 | } | |
2292 | } | |
2293 | ||
2294 | /* close the CM node down if it is still active */ | |
2295 | if (nesqp->cm_node) { | |
2296 | nes_debug(NES_DBG_CM, "Call close API\n"); | |
2297 | ||
2298 | g_cm_core->api->close(g_cm_core, nesqp->cm_node); | |
2299 | nesqp->cm_node = NULL; | |
2300 | } | |
2301 | ||
2302 | return ret; | |
2303 | } | |
2304 | ||
2305 | ||
2306 | /** | |
2307 | * nes_accept | |
2308 | */ | |
2309 | int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
2310 | { | |
2311 | u64 u64temp; | |
2312 | struct ib_qp *ibqp; | |
2313 | struct nes_qp *nesqp; | |
2314 | struct nes_vnic *nesvnic; | |
2315 | struct nes_device *nesdev; | |
2316 | struct nes_cm_node *cm_node; | |
2317 | struct nes_adapter *adapter; | |
2318 | struct ib_qp_attr attr; | |
2319 | struct iw_cm_event cm_event; | |
2320 | struct nes_hw_qp_wqe *wqe; | |
2321 | struct nes_v4_quad nes_quad; | |
2322 | int ret; | |
2323 | ||
2324 | ibqp = nes_get_qp(cm_id->device, conn_param->qpn); | |
2325 | if (!ibqp) | |
2326 | return -EINVAL; | |
2327 | ||
2328 | /* get all our handles */ | |
2329 | nesqp = to_nesqp(ibqp); | |
2330 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2331 | nesdev = nesvnic->nesdev; | |
2332 | adapter = nesdev->nesadapter; | |
2333 | ||
2334 | nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n", | |
2335 | nesvnic, nesvnic->netdev, nesvnic->netdev->name); | |
2336 | ||
2337 | /* since this is from a listen, we were able to put node handle into cm_id */ | |
2338 | cm_node = (struct nes_cm_node *)cm_id->provider_data; | |
2339 | ||
2340 | /* associate the node with the QP */ | |
2341 | nesqp->cm_node = (void *)cm_node; | |
2342 | ||
2343 | nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu\n", | |
2344 | nesqp->hwqp.qp_id, cm_node, jiffies); | |
2345 | atomic_inc(&cm_accepts); | |
2346 | ||
2347 | nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n", | |
2348 | atomic_read(&nesvnic->netdev->refcnt)); | |
2349 | ||
2350 | /* allocate the ietf frame and space for private data */ | |
2351 | nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev, | |
2352 | sizeof(struct ietf_mpa_frame) + conn_param->private_data_len, | |
2353 | &nesqp->ietf_frame_pbase); | |
2354 | ||
2355 | if (!nesqp->ietf_frame) { | |
2356 | nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n"); | |
2357 | return -ENOMEM; | |
2358 | } | |
2359 | ||
2360 | ||
2361 | /* setup the MPA frame */ | |
2362 | nesqp->private_data_len = conn_param->private_data_len; | |
2363 | memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); | |
2364 | ||
2365 | memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data, | |
2366 | conn_param->private_data_len); | |
2367 | ||
2368 | nesqp->ietf_frame->priv_data_len = cpu_to_be16(conn_param->private_data_len); | |
2369 | nesqp->ietf_frame->rev = mpa_version; | |
2370 | nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC; | |
2371 | ||
2372 | /* setup our first outgoing iWarp send WQE (the IETF frame response) */ | |
2373 | wqe = &nesqp->hwqp.sq_vbase[0]; | |
2374 | ||
2375 | if (cm_id->remote_addr.sin_addr.s_addr != cm_id->local_addr.sin_addr.s_addr) { | |
2376 | u64temp = (unsigned long)nesqp; | |
2377 | u64temp |= NES_SW_CONTEXT_ALIGN>>1; | |
2378 | set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, | |
2379 | u64temp); | |
2380 | wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = | |
2381 | cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING | NES_IWARP_SQ_WQE_WRPDU); | |
2382 | wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = | |
2383 | cpu_to_le32(conn_param->private_data_len + sizeof(struct ietf_mpa_frame)); | |
2384 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = | |
2385 | cpu_to_le32((u32)nesqp->ietf_frame_pbase); | |
2386 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = | |
2387 | cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32)); | |
2388 | wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = | |
2389 | cpu_to_le32(conn_param->private_data_len + sizeof(struct ietf_mpa_frame)); | |
2390 | wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0; | |
2391 | ||
2392 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32( | |
2393 | NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | NES_QPCONTEXT_ORDIRD_WRPDU); | |
2394 | } else { | |
2395 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | | |
2396 | NES_QPCONTEXT_ORDIRD_WRPDU | NES_QPCONTEXT_ORDIRD_ALSMM)); | |
2397 | } | |
2398 | nesqp->skip_lsmm = 1; | |
2399 | ||
2400 | ||
2401 | /* Cache the cm_id in the qp */ | |
2402 | nesqp->cm_id = cm_id; | |
2403 | cm_node->cm_id = cm_id; | |
2404 | ||
2405 | /* nesqp->cm_node = (void *)cm_id->provider_data; */ | |
2406 | cm_id->provider_data = nesqp; | |
2407 | nesqp->active_conn = 0; | |
2408 | ||
2409 | nes_cm_init_tsa_conn(nesqp, cm_node); | |
2410 | ||
2411 | nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(cm_id->local_addr.sin_port)); | |
2412 | nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(cm_id->remote_addr.sin_port)); | |
2413 | nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr)); | |
2414 | ||
2415 | nesqp->nesqp_context->misc2 |= cpu_to_le32( | |
2416 | (u32)PCI_FUNC(nesdev->pcidev->devfn) << NES_QPCONTEXT_MISC2_SRC_IP_SHIFT); | |
2417 | ||
2418 | nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32( | |
2419 | nes_arp_table(nesdev, le32_to_cpu(nesqp->nesqp_context->ip0), NULL, | |
2420 | NES_ARP_RESOLVE) << 16); | |
2421 | ||
2422 | nesqp->nesqp_context->ts_val_delta = cpu_to_le32( | |
2423 | jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW)); | |
2424 | ||
2425 | nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id); | |
2426 | ||
2427 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32( | |
2428 | ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT)); | |
2429 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord); | |
2430 | ||
2431 | memset(&nes_quad, 0, sizeof(nes_quad)); | |
2432 | nes_quad.DstIpAdrIndex = cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24); | |
2433 | nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr; | |
2434 | nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port; | |
2435 | nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port; | |
2436 | ||
2437 | /* Produce hash key */ | |
2438 | nesqp->hte_index = cpu_to_be32( | |
2439 | crc32c(~0, (void *)&nes_quad, sizeof(nes_quad)) ^ 0xffffffff); | |
2440 | nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n", | |
2441 | nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask); | |
2442 | ||
2443 | nesqp->hte_index &= adapter->hte_index_mask; | |
2444 | nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index); | |
2445 | ||
2446 | cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node); | |
2447 | ||
2448 | nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = 0x%08X:0x%04X," | |
2449 | " rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + private data length=%zu.\n", | |
2450 | nesqp->hwqp.qp_id, | |
2451 | ntohl(cm_id->remote_addr.sin_addr.s_addr), | |
2452 | ntohs(cm_id->remote_addr.sin_port), | |
2453 | ntohl(cm_id->local_addr.sin_addr.s_addr), | |
2454 | ntohs(cm_id->local_addr.sin_port), | |
2455 | le32_to_cpu(nesqp->nesqp_context->rcv_nxt), | |
2456 | le32_to_cpu(nesqp->nesqp_context->snd_nxt), | |
2457 | conn_param->private_data_len+sizeof(struct ietf_mpa_frame)); | |
2458 | ||
2459 | attr.qp_state = IB_QPS_RTS; | |
2460 | nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL); | |
2461 | ||
2462 | /* notify OF layer that accept event was successfull */ | |
2463 | cm_id->add_ref(cm_id); | |
2464 | ||
2465 | cm_event.event = IW_CM_EVENT_ESTABLISHED; | |
2466 | cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED; | |
2467 | cm_event.provider_data = (void *)nesqp; | |
2468 | cm_event.local_addr = cm_id->local_addr; | |
2469 | cm_event.remote_addr = cm_id->remote_addr; | |
2470 | cm_event.private_data = NULL; | |
2471 | cm_event.private_data_len = 0; | |
2472 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2473 | if (cm_node->loopbackpartner) { | |
2474 | cm_node->loopbackpartner->mpa_frame_size = nesqp->private_data_len; | |
2475 | /* copy entire MPA frame to our cm_node's frame */ | |
2476 | memcpy(cm_node->loopbackpartner->mpa_frame_buf, nesqp->ietf_frame->priv_data, | |
2477 | nesqp->private_data_len); | |
2478 | create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED); | |
2479 | } | |
2480 | if (ret) | |
2481 | printk("%s[%u] OFA CM event_handler returned, ret=%d\n", | |
2482 | __FUNCTION__, __LINE__, ret); | |
2483 | ||
2484 | return 0; | |
2485 | } | |
2486 | ||
2487 | ||
2488 | /** | |
2489 | * nes_reject | |
2490 | */ | |
2491 | int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) | |
2492 | { | |
2493 | struct nes_cm_node *cm_node; | |
2494 | struct nes_cm_core *cm_core; | |
2495 | ||
2496 | atomic_inc(&cm_rejects); | |
2497 | cm_node = (struct nes_cm_node *) cm_id->provider_data; | |
2498 | cm_core = cm_node->cm_core; | |
2499 | cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len; | |
2500 | ||
2501 | strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP); | |
2502 | memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len); | |
2503 | ||
2504 | cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len); | |
2505 | cm_node->mpa_frame.rev = mpa_version; | |
2506 | cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT; | |
2507 | ||
2508 | cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node); | |
2509 | ||
2510 | return 0; | |
2511 | } | |
2512 | ||
2513 | ||
2514 | /** | |
2515 | * nes_connect | |
2516 | * setup and launch cm connect node | |
2517 | */ | |
2518 | int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
2519 | { | |
2520 | struct ib_qp *ibqp; | |
2521 | struct nes_qp *nesqp; | |
2522 | struct nes_vnic *nesvnic; | |
2523 | struct nes_device *nesdev; | |
2524 | struct nes_cm_node *cm_node; | |
2525 | struct nes_cm_info cm_info; | |
2526 | ||
2527 | ibqp = nes_get_qp(cm_id->device, conn_param->qpn); | |
2528 | if (!ibqp) | |
2529 | return -EINVAL; | |
2530 | nesqp = to_nesqp(ibqp); | |
2531 | if (!nesqp) | |
2532 | return -EINVAL; | |
2533 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2534 | if (!nesvnic) | |
2535 | return -EINVAL; | |
2536 | nesdev = nesvnic->nesdev; | |
2537 | if (!nesdev) | |
2538 | return -EINVAL; | |
2539 | ||
2540 | atomic_inc(&cm_connects); | |
2541 | ||
2542 | nesqp->ietf_frame = kzalloc(sizeof(struct ietf_mpa_frame) + | |
2543 | conn_param->private_data_len, GFP_KERNEL); | |
2544 | if (!nesqp->ietf_frame) | |
2545 | return -ENOMEM; | |
2546 | ||
2547 | /* set qp as having an active connection */ | |
2548 | nesqp->active_conn = 1; | |
2549 | ||
2550 | nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", | |
2551 | nesqp->hwqp.qp_id, | |
2552 | ntohl(cm_id->remote_addr.sin_addr.s_addr), | |
2553 | ntohs(cm_id->remote_addr.sin_port), | |
2554 | ntohl(cm_id->local_addr.sin_addr.s_addr), | |
2555 | ntohs(cm_id->local_addr.sin_port)); | |
2556 | ||
2557 | /* cache the cm_id in the qp */ | |
2558 | nesqp->cm_id = cm_id; | |
2559 | ||
2560 | cm_id->provider_data = nesqp; | |
2561 | ||
2562 | /* copy the private data */ | |
2563 | if (conn_param->private_data_len) { | |
2564 | memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data, | |
2565 | conn_param->private_data_len); | |
2566 | } | |
2567 | ||
2568 | nesqp->private_data_len = conn_param->private_data_len; | |
2569 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord); | |
2570 | nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord); | |
2571 | nes_debug(NES_DBG_CM, "mpa private data len =%u\n", conn_param->private_data_len); | |
2572 | ||
2573 | strcpy(&nesqp->ietf_frame->key[0], IEFT_MPA_KEY_REQ); | |
2574 | nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC; | |
2575 | nesqp->ietf_frame->rev = IETF_MPA_VERSION; | |
2576 | nesqp->ietf_frame->priv_data_len = htons(conn_param->private_data_len); | |
2577 | ||
2578 | if (cm_id->local_addr.sin_addr.s_addr != cm_id->remote_addr.sin_addr.s_addr) | |
2579 | nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port), | |
2580 | PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD); | |
2581 | ||
2582 | /* set up the connection params for the node */ | |
2583 | cm_info.loc_addr = (cm_id->local_addr.sin_addr.s_addr); | |
2584 | cm_info.loc_port = (cm_id->local_addr.sin_port); | |
2585 | cm_info.rem_addr = (cm_id->remote_addr.sin_addr.s_addr); | |
2586 | cm_info.rem_port = (cm_id->remote_addr.sin_port); | |
2587 | cm_info.cm_id = cm_id; | |
2588 | cm_info.conn_type = NES_CM_IWARP_CONN_TYPE; | |
2589 | ||
2590 | cm_id->add_ref(cm_id); | |
2591 | nes_add_ref(&nesqp->ibqp); | |
2592 | ||
2593 | /* create a connect CM node connection */ | |
2594 | cm_node = g_cm_core->api->connect(g_cm_core, nesvnic, nesqp->ietf_frame, &cm_info); | |
2595 | if (!cm_node) { | |
2596 | if (cm_id->local_addr.sin_addr.s_addr != cm_id->remote_addr.sin_addr.s_addr) | |
2597 | nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port), | |
2598 | PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL); | |
2599 | nes_rem_ref(&nesqp->ibqp); | |
2600 | kfree(nesqp->ietf_frame); | |
2601 | nesqp->ietf_frame = NULL; | |
2602 | cm_id->rem_ref(cm_id); | |
2603 | return -ENOMEM; | |
2604 | } | |
2605 | ||
2606 | cm_node->apbvt_set = 1; | |
2607 | nesqp->cm_node = cm_node; | |
2608 | ||
2609 | return 0; | |
2610 | } | |
2611 | ||
2612 | ||
2613 | /** | |
2614 | * nes_create_listen | |
2615 | */ | |
2616 | int nes_create_listen(struct iw_cm_id *cm_id, int backlog) | |
2617 | { | |
2618 | struct nes_vnic *nesvnic; | |
2619 | struct nes_cm_listener *cm_node; | |
2620 | struct nes_cm_info cm_info; | |
2621 | struct nes_adapter *adapter; | |
2622 | int err; | |
2623 | ||
2624 | ||
2625 | nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n", | |
2626 | cm_id, ntohs(cm_id->local_addr.sin_port)); | |
2627 | ||
2628 | nesvnic = to_nesvnic(cm_id->device); | |
2629 | if (!nesvnic) | |
2630 | return -EINVAL; | |
2631 | adapter = nesvnic->nesdev->nesadapter; | |
2632 | nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n", | |
2633 | nesvnic, nesvnic->netdev, nesvnic->netdev->name); | |
2634 | ||
2635 | nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n", | |
2636 | nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr); | |
2637 | ||
2638 | /* setup listen params in our api call struct */ | |
2639 | cm_info.loc_addr = nesvnic->local_ipaddr; | |
2640 | cm_info.loc_port = cm_id->local_addr.sin_port; | |
2641 | cm_info.backlog = backlog; | |
2642 | cm_info.cm_id = cm_id; | |
2643 | ||
2644 | cm_info.conn_type = NES_CM_IWARP_CONN_TYPE; | |
2645 | ||
2646 | ||
2647 | cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info); | |
2648 | if (!cm_node) { | |
2649 | printk("%s[%u] Error returned from listen API call\n", | |
2650 | __FUNCTION__, __LINE__); | |
2651 | return -ENOMEM; | |
2652 | } | |
2653 | ||
2654 | cm_id->provider_data = cm_node; | |
2655 | ||
2656 | if (!cm_node->reused_node) { | |
2657 | err = nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port), | |
2658 | PCI_FUNC(nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD); | |
2659 | if (err) { | |
2660 | printk("nes_manage_apbvt call returned %d.\n", err); | |
2661 | g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node); | |
2662 | return err; | |
2663 | } | |
2664 | cm_listens_created++; | |
2665 | } | |
2666 | ||
2667 | cm_id->add_ref(cm_id); | |
2668 | cm_id->provider_data = (void *)cm_node; | |
2669 | ||
2670 | ||
2671 | return 0; | |
2672 | } | |
2673 | ||
2674 | ||
2675 | /** | |
2676 | * nes_destroy_listen | |
2677 | */ | |
2678 | int nes_destroy_listen(struct iw_cm_id *cm_id) | |
2679 | { | |
2680 | if (cm_id->provider_data) | |
2681 | g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data); | |
2682 | else | |
2683 | nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n"); | |
2684 | ||
2685 | cm_id->rem_ref(cm_id); | |
2686 | ||
2687 | return 0; | |
2688 | } | |
2689 | ||
2690 | ||
2691 | /** | |
2692 | * nes_cm_recv | |
2693 | */ | |
2694 | int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice) | |
2695 | { | |
2696 | cm_packets_received++; | |
2697 | if ((g_cm_core) && (g_cm_core->api)) { | |
2698 | g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb); | |
2699 | } else { | |
2700 | nes_debug(NES_DBG_CM, "Unable to process packet for CM," | |
2701 | " cm is not setup properly.\n"); | |
2702 | } | |
2703 | ||
2704 | return 0; | |
2705 | } | |
2706 | ||
2707 | ||
2708 | /** | |
2709 | * nes_cm_start | |
2710 | * Start and init a cm core module | |
2711 | */ | |
2712 | int nes_cm_start(void) | |
2713 | { | |
2714 | nes_debug(NES_DBG_CM, "\n"); | |
2715 | /* create the primary CM core, pass this handle to subsequent core inits */ | |
2716 | g_cm_core = nes_cm_alloc_core(); | |
2717 | if (g_cm_core) { | |
2718 | return 0; | |
2719 | } else { | |
2720 | return -ENOMEM; | |
2721 | } | |
2722 | } | |
2723 | ||
2724 | ||
2725 | /** | |
2726 | * nes_cm_stop | |
2727 | * stop and dealloc all cm core instances | |
2728 | */ | |
2729 | int nes_cm_stop(void) | |
2730 | { | |
2731 | g_cm_core->api->destroy_cm_core(g_cm_core); | |
2732 | return 0; | |
2733 | } | |
2734 | ||
2735 | ||
2736 | /** | |
2737 | * cm_event_connected | |
2738 | * handle a connected event, setup QPs and HW | |
2739 | */ | |
2740 | void cm_event_connected(struct nes_cm_event *event) | |
2741 | { | |
2742 | u64 u64temp; | |
2743 | struct nes_qp *nesqp; | |
2744 | struct nes_vnic *nesvnic; | |
2745 | struct nes_device *nesdev; | |
2746 | struct nes_cm_node *cm_node; | |
2747 | struct nes_adapter *nesadapter; | |
2748 | struct ib_qp_attr attr; | |
2749 | struct iw_cm_id *cm_id; | |
2750 | struct iw_cm_event cm_event; | |
2751 | struct nes_hw_qp_wqe *wqe; | |
2752 | struct nes_v4_quad nes_quad; | |
2753 | int ret; | |
2754 | ||
2755 | /* get all our handles */ | |
2756 | cm_node = event->cm_node; | |
2757 | cm_id = cm_node->cm_id; | |
2758 | nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id); | |
2759 | nesqp = (struct nes_qp *)cm_id->provider_data; | |
2760 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2761 | nesdev = nesvnic->nesdev; | |
2762 | nesadapter = nesdev->nesadapter; | |
2763 | ||
2764 | if (nesqp->destroyed) { | |
2765 | return; | |
2766 | } | |
2767 | atomic_inc(&cm_connecteds); | |
2768 | nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on" | |
2769 | " local port 0x%04X. jiffies = %lu.\n", | |
2770 | nesqp->hwqp.qp_id, | |
2771 | ntohl(cm_id->remote_addr.sin_addr.s_addr), | |
2772 | ntohs(cm_id->remote_addr.sin_port), | |
2773 | ntohs(cm_id->local_addr.sin_port), | |
2774 | jiffies); | |
2775 | ||
2776 | nes_cm_init_tsa_conn(nesqp, cm_node); | |
2777 | ||
2778 | /* set the QP tsa context */ | |
2779 | nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(cm_id->local_addr.sin_port)); | |
2780 | nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(cm_id->remote_addr.sin_port)); | |
2781 | nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr)); | |
2782 | ||
2783 | nesqp->nesqp_context->misc2 |= cpu_to_le32( | |
2784 | (u32)PCI_FUNC(nesdev->pcidev->devfn) << NES_QPCONTEXT_MISC2_SRC_IP_SHIFT); | |
2785 | nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32( | |
2786 | nes_arp_table(nesdev, le32_to_cpu(nesqp->nesqp_context->ip0), | |
2787 | NULL, NES_ARP_RESOLVE) << 16); | |
2788 | nesqp->nesqp_context->ts_val_delta = cpu_to_le32( | |
2789 | jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW)); | |
2790 | nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id); | |
2791 | nesqp->nesqp_context->ird_ord_sizes |= | |
2792 | cpu_to_le32((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT); | |
2793 | ||
2794 | /* Adjust tail for not having a LSMM */ | |
2795 | nesqp->hwqp.sq_tail = 1; | |
2796 | ||
2797 | #if defined(NES_SEND_FIRST_WRITE) | |
2798 | if (cm_node->send_write0) { | |
2799 | nes_debug(NES_DBG_CM, "Sending first write.\n"); | |
2800 | wqe = &nesqp->hwqp.sq_vbase[0]; | |
2801 | u64temp = (unsigned long)nesqp; | |
2802 | u64temp |= NES_SW_CONTEXT_ALIGN>>1; | |
2803 | set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, | |
2804 | u64temp); | |
2805 | wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(NES_IWARP_SQ_OP_RDMAW); | |
2806 | wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0; | |
2807 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0; | |
2808 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0; | |
2809 | wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0; | |
2810 | wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0; | |
2811 | ||
2812 | /* use the reserved spot on the WQ for the extra first WQE */ | |
2813 | nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | | |
2814 | NES_QPCONTEXT_ORDIRD_WRPDU | NES_QPCONTEXT_ORDIRD_ALSMM)); | |
2815 | nesqp->skip_lsmm = 1; | |
2816 | nesqp->hwqp.sq_tail = 0; | |
2817 | nes_write32(nesdev->regs + NES_WQE_ALLOC, | |
2818 | (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id); | |
2819 | } | |
2820 | #endif | |
2821 | ||
2822 | memset(&nes_quad, 0, sizeof(nes_quad)); | |
2823 | ||
2824 | nes_quad.DstIpAdrIndex = cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24); | |
2825 | nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr; | |
2826 | nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port; | |
2827 | nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port; | |
2828 | ||
2829 | /* Produce hash key */ | |
2830 | nesqp->hte_index = cpu_to_be32( | |
2831 | crc32c(~0, (void *)&nes_quad, sizeof(nes_quad)) ^ 0xffffffff); | |
2832 | nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n", | |
2833 | nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask); | |
2834 | ||
2835 | nesqp->hte_index &= nesadapter->hte_index_mask; | |
2836 | nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index); | |
2837 | ||
2838 | nesqp->ietf_frame = &cm_node->mpa_frame; | |
2839 | nesqp->private_data_len = (u8) cm_node->mpa_frame_size; | |
2840 | cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node); | |
2841 | ||
2842 | /* modify QP state to rts */ | |
2843 | attr.qp_state = IB_QPS_RTS; | |
2844 | nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL); | |
2845 | ||
2846 | /* notify OF layer we successfully created the requested connection */ | |
2847 | cm_event.event = IW_CM_EVENT_CONNECT_REPLY; | |
2848 | cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED; | |
2849 | cm_event.provider_data = cm_id->provider_data; | |
2850 | cm_event.local_addr.sin_family = AF_INET; | |
2851 | cm_event.local_addr.sin_port = cm_id->local_addr.sin_port; | |
2852 | cm_event.remote_addr = cm_id->remote_addr; | |
2853 | ||
2854 | cm_event.private_data = (void *)event->cm_node->mpa_frame_buf; | |
2855 | cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size; | |
2856 | ||
2857 | cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr; | |
2858 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2859 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
2860 | ||
2861 | if (ret) | |
2862 | printk("%s[%u] OFA CM event_handler returned, ret=%d\n", | |
2863 | __FUNCTION__, __LINE__, ret); | |
2864 | nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = %lu\n", | |
2865 | nesqp->hwqp.qp_id, jiffies ); | |
2866 | ||
2867 | nes_rem_ref(&nesqp->ibqp); | |
2868 | ||
2869 | return; | |
2870 | } | |
2871 | ||
2872 | ||
2873 | /** | |
2874 | * cm_event_connect_error | |
2875 | */ | |
2876 | void cm_event_connect_error(struct nes_cm_event *event) | |
2877 | { | |
2878 | struct nes_qp *nesqp; | |
2879 | struct iw_cm_id *cm_id; | |
2880 | struct iw_cm_event cm_event; | |
2881 | /* struct nes_cm_info cm_info; */ | |
2882 | int ret; | |
2883 | ||
2884 | if (!event->cm_node) | |
2885 | return; | |
2886 | ||
2887 | cm_id = event->cm_node->cm_id; | |
2888 | if (!cm_id) { | |
2889 | return; | |
2890 | } | |
2891 | ||
2892 | nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id); | |
2893 | nesqp = cm_id->provider_data; | |
2894 | ||
2895 | if (!nesqp) { | |
2896 | return; | |
2897 | } | |
2898 | ||
2899 | /* notify OF layer about this connection error event */ | |
2900 | /* cm_id->rem_ref(cm_id); */ | |
2901 | nesqp->cm_id = NULL; | |
2902 | cm_id->provider_data = NULL; | |
2903 | cm_event.event = IW_CM_EVENT_CONNECT_REPLY; | |
2904 | cm_event.status = IW_CM_EVENT_STATUS_REJECTED; | |
2905 | cm_event.provider_data = cm_id->provider_data; | |
2906 | cm_event.local_addr = cm_id->local_addr; | |
2907 | cm_event.remote_addr = cm_id->remote_addr; | |
2908 | cm_event.private_data = NULL; | |
2909 | cm_event.private_data_len = 0; | |
2910 | ||
2911 | nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remove_addr=%08x\n", | |
2912 | cm_event.local_addr.sin_addr.s_addr, cm_event.remote_addr.sin_addr.s_addr); | |
2913 | ||
2914 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2915 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
2916 | if (ret) | |
2917 | printk("%s[%u] OFA CM event_handler returned, ret=%d\n", | |
2918 | __FUNCTION__, __LINE__, ret); | |
2919 | nes_rem_ref(&nesqp->ibqp); | |
2920 | cm_id->rem_ref(cm_id); | |
2921 | ||
2922 | return; | |
2923 | } | |
2924 | ||
2925 | ||
2926 | /** | |
2927 | * cm_event_reset | |
2928 | */ | |
2929 | void cm_event_reset(struct nes_cm_event *event) | |
2930 | { | |
2931 | struct nes_qp *nesqp; | |
2932 | struct iw_cm_id *cm_id; | |
2933 | struct iw_cm_event cm_event; | |
2934 | /* struct nes_cm_info cm_info; */ | |
2935 | int ret; | |
2936 | ||
2937 | if (!event->cm_node) | |
2938 | return; | |
2939 | ||
2940 | if (!event->cm_node->cm_id) | |
2941 | return; | |
2942 | ||
2943 | cm_id = event->cm_node->cm_id; | |
2944 | ||
2945 | nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id); | |
2946 | nesqp = cm_id->provider_data; | |
2947 | ||
2948 | nesqp->cm_id = NULL; | |
2949 | /* cm_id->provider_data = NULL; */ | |
2950 | cm_event.event = IW_CM_EVENT_DISCONNECT; | |
2951 | cm_event.status = IW_CM_EVENT_STATUS_RESET; | |
2952 | cm_event.provider_data = cm_id->provider_data; | |
2953 | cm_event.local_addr = cm_id->local_addr; | |
2954 | cm_event.remote_addr = cm_id->remote_addr; | |
2955 | cm_event.private_data = NULL; | |
2956 | cm_event.private_data_len = 0; | |
2957 | ||
2958 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2959 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
2960 | ||
2961 | ||
2962 | /* notify OF layer about this connection error event */ | |
2963 | cm_id->rem_ref(cm_id); | |
2964 | ||
2965 | return; | |
2966 | } | |
2967 | ||
2968 | ||
2969 | /** | |
2970 | * cm_event_mpa_req | |
2971 | */ | |
2972 | void cm_event_mpa_req(struct nes_cm_event *event) | |
2973 | { | |
2974 | struct iw_cm_id *cm_id; | |
2975 | struct iw_cm_event cm_event; | |
2976 | int ret; | |
2977 | struct nes_cm_node *cm_node; | |
2978 | ||
2979 | cm_node = event->cm_node; | |
2980 | if (!cm_node) | |
2981 | return; | |
2982 | cm_id = cm_node->cm_id; | |
2983 | ||
2984 | atomic_inc(&cm_connect_reqs); | |
2985 | nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n", | |
2986 | cm_node, cm_id, jiffies); | |
2987 | ||
2988 | cm_event.event = IW_CM_EVENT_CONNECT_REQUEST; | |
2989 | cm_event.status = IW_CM_EVENT_STATUS_OK; | |
2990 | cm_event.provider_data = (void *)cm_node; | |
2991 | ||
2992 | cm_event.local_addr.sin_family = AF_INET; | |
2993 | cm_event.local_addr.sin_port = htons(event->cm_info.loc_port); | |
2994 | cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr); | |
2995 | ||
2996 | cm_event.remote_addr.sin_family = AF_INET; | |
2997 | cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port); | |
2998 | cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr); | |
2999 | ||
3000 | cm_event.private_data = cm_node->mpa_frame_buf; | |
3001 | cm_event.private_data_len = (u8) cm_node->mpa_frame_size; | |
3002 | ||
3003 | ret = cm_id->event_handler(cm_id, &cm_event); | |
3004 | if (ret) | |
3005 | printk("%s[%u] OFA CM event_handler returned, ret=%d\n", | |
3006 | __FUNCTION__, __LINE__, ret); | |
3007 | ||
3008 | return; | |
3009 | } | |
3010 | ||
3011 | ||
3012 | static void nes_cm_event_handler(struct work_struct *); | |
3013 | ||
3014 | /** | |
3015 | * nes_cm_post_event | |
3016 | * post an event to the cm event handler | |
3017 | */ | |
3018 | int nes_cm_post_event(struct nes_cm_event *event) | |
3019 | { | |
3020 | atomic_inc(&event->cm_node->cm_core->events_posted); | |
3021 | add_ref_cm_node(event->cm_node); | |
3022 | event->cm_info.cm_id->add_ref(event->cm_info.cm_id); | |
3023 | INIT_WORK(&event->event_work, nes_cm_event_handler); | |
3024 | nes_debug(NES_DBG_CM, "queue_work, event=%p\n", event); | |
3025 | ||
3026 | queue_work(event->cm_node->cm_core->event_wq, &event->event_work); | |
3027 | ||
3028 | nes_debug(NES_DBG_CM, "Exit\n"); | |
3029 | return 0; | |
3030 | } | |
3031 | ||
3032 | ||
3033 | /** | |
3034 | * nes_cm_event_handler | |
3035 | * worker function to handle cm events | |
3036 | * will free instance of nes_cm_event | |
3037 | */ | |
3038 | static void nes_cm_event_handler(struct work_struct *work) | |
3039 | { | |
3040 | struct nes_cm_event *event = container_of(work, struct nes_cm_event, event_work); | |
3041 | struct nes_cm_core *cm_core; | |
3042 | ||
3043 | if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core)) { | |
3044 | return; | |
3045 | } | |
3046 | cm_core = event->cm_node->cm_core; | |
3047 | nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n", | |
3048 | event, event->type, atomic_read(&cm_core->events_posted)); | |
3049 | ||
3050 | switch (event->type) { | |
3051 | case NES_CM_EVENT_MPA_REQ: | |
3052 | cm_event_mpa_req(event); | |
3053 | nes_debug(NES_DBG_CM, "CM Event: MPA REQUEST\n"); | |
3054 | break; | |
3055 | case NES_CM_EVENT_RESET: | |
3056 | nes_debug(NES_DBG_CM, "CM Event: RESET\n"); | |
3057 | cm_event_reset(event); | |
3058 | break; | |
3059 | case NES_CM_EVENT_CONNECTED: | |
3060 | if ((!event->cm_node->cm_id) || | |
3061 | (event->cm_node->state != NES_CM_STATE_TSA)) { | |
3062 | break; | |
3063 | } | |
3064 | cm_event_connected(event); | |
3065 | nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n"); | |
3066 | break; | |
3067 | case NES_CM_EVENT_ABORTED: | |
3068 | if ((!event->cm_node->cm_id) || (event->cm_node->state == NES_CM_STATE_TSA)) { | |
3069 | break; | |
3070 | } | |
3071 | cm_event_connect_error(event); | |
3072 | nes_debug(NES_DBG_CM, "CM Event: ABORTED\n"); | |
3073 | break; | |
3074 | case NES_CM_EVENT_DROPPED_PKT: | |
3075 | nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n"); | |
3076 | break; | |
3077 | default: | |
3078 | nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n"); | |
3079 | break; | |
3080 | } | |
3081 | ||
3082 | atomic_dec(&cm_core->events_posted); | |
3083 | event->cm_info.cm_id->rem_ref(event->cm_info.cm_id); | |
3084 | rem_ref_cm_node(cm_core, event->cm_node); | |
3085 | kfree(event); | |
3086 | ||
3087 | return; | |
3088 | } |