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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> | |
f2b2b59b | 43 | #include <linux/if_vlan.h> |
3c2d774c GS |
44 | #include <linux/notifier.h> |
45 | #include <linux/net.h> | |
46 | #include <linux/types.h> | |
47 | #include <linux/timer.h> | |
48 | #include <linux/time.h> | |
49 | #include <linux/delay.h> | |
50 | #include <linux/etherdevice.h> | |
51 | #include <linux/netdevice.h> | |
52 | #include <linux/random.h> | |
53 | #include <linux/list.h> | |
54 | #include <linux/threads.h> | |
55 | ||
56 | #include <net/neighbour.h> | |
57 | #include <net/route.h> | |
58 | #include <net/ip_fib.h> | |
59 | ||
60 | #include "nes.h" | |
61 | ||
62 | u32 cm_packets_sent; | |
63 | u32 cm_packets_bounced; | |
64 | u32 cm_packets_dropped; | |
65 | u32 cm_packets_retrans; | |
66 | u32 cm_packets_created; | |
67 | u32 cm_packets_received; | |
68 | u32 cm_listens_created; | |
69 | u32 cm_listens_destroyed; | |
70 | u32 cm_backlog_drops; | |
71 | atomic_t cm_loopbacks; | |
72 | atomic_t cm_nodes_created; | |
73 | atomic_t cm_nodes_destroyed; | |
74 | atomic_t cm_accel_dropped_pkts; | |
75 | atomic_t cm_resets_recvd; | |
76 | ||
77 | static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *); | |
78 | static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, | |
79 | struct nes_vnic *, struct nes_cm_info *); | |
80 | static int add_ref_cm_node(struct nes_cm_node *); | |
81 | static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *); | |
82 | static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *); | |
1a855fbf RD |
83 | static struct sk_buff *form_cm_frame(struct sk_buff *, struct nes_cm_node *, |
84 | void *, u32, void *, u32, u8); | |
85 | static struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node); | |
86 | ||
87 | static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, | |
88 | struct nes_vnic *, | |
89 | struct ietf_mpa_frame *, | |
90 | struct nes_cm_info *); | |
91 | static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *, | |
92 | struct nes_cm_node *); | |
93 | static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *, | |
94 | struct nes_cm_node *); | |
95 | static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *); | |
96 | static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, | |
97 | struct sk_buff *); | |
98 | static int mini_cm_dealloc_core(struct nes_cm_core *); | |
99 | static int mini_cm_get(struct nes_cm_core *); | |
100 | static int mini_cm_set(struct nes_cm_core *, u32, u32); | |
101 | static int nes_cm_disconn_true(struct nes_qp *); | |
102 | static int nes_cm_post_event(struct nes_cm_event *event); | |
103 | static int nes_disconnect(struct nes_qp *nesqp, int abrupt); | |
104 | static void nes_disconnect_worker(struct work_struct *work); | |
105 | static int send_ack(struct nes_cm_node *cm_node); | |
106 | static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb); | |
3c2d774c GS |
107 | |
108 | /* External CM API Interface */ | |
109 | /* instance of function pointers for client API */ | |
110 | /* set address of this instance to cm_core->cm_ops at cm_core alloc */ | |
111 | static struct nes_cm_ops nes_cm_api = { | |
112 | mini_cm_accelerated, | |
113 | mini_cm_listen, | |
114 | mini_cm_del_listen, | |
115 | mini_cm_connect, | |
116 | mini_cm_close, | |
117 | mini_cm_accept, | |
118 | mini_cm_reject, | |
119 | mini_cm_recv_pkt, | |
120 | mini_cm_dealloc_core, | |
121 | mini_cm_get, | |
122 | mini_cm_set | |
123 | }; | |
124 | ||
1a855fbf | 125 | static struct nes_cm_core *g_cm_core; |
3c2d774c GS |
126 | |
127 | atomic_t cm_connects; | |
128 | atomic_t cm_accepts; | |
129 | atomic_t cm_disconnects; | |
130 | atomic_t cm_closes; | |
131 | atomic_t cm_connecteds; | |
132 | atomic_t cm_connect_reqs; | |
133 | atomic_t cm_rejects; | |
134 | ||
135 | ||
136 | /** | |
137 | * create_event | |
138 | */ | |
139 | static struct nes_cm_event *create_event(struct nes_cm_node *cm_node, | |
140 | enum nes_cm_event_type type) | |
141 | { | |
142 | struct nes_cm_event *event; | |
143 | ||
144 | if (!cm_node->cm_id) | |
145 | return NULL; | |
146 | ||
147 | /* allocate an empty event */ | |
148 | event = kzalloc(sizeof(*event), GFP_ATOMIC); | |
149 | ||
150 | if (!event) | |
151 | return NULL; | |
152 | ||
153 | event->type = type; | |
154 | event->cm_node = cm_node; | |
155 | event->cm_info.rem_addr = cm_node->rem_addr; | |
156 | event->cm_info.loc_addr = cm_node->loc_addr; | |
157 | event->cm_info.rem_port = cm_node->rem_port; | |
158 | event->cm_info.loc_port = cm_node->loc_port; | |
159 | event->cm_info.cm_id = cm_node->cm_id; | |
160 | ||
161 | nes_debug(NES_DBG_CM, "Created event=%p, type=%u, dst_addr=%08x[%x]," | |
162 | " src_addr=%08x[%x]\n", | |
163 | event, type, | |
164 | event->cm_info.loc_addr, event->cm_info.loc_port, | |
165 | event->cm_info.rem_addr, event->cm_info.rem_port); | |
166 | ||
167 | nes_cm_post_event(event); | |
168 | return event; | |
169 | } | |
170 | ||
171 | ||
172 | /** | |
173 | * send_mpa_request | |
174 | */ | |
1a855fbf | 175 | static int send_mpa_request(struct nes_cm_node *cm_node) |
3c2d774c GS |
176 | { |
177 | struct sk_buff *skb; | |
178 | int ret; | |
179 | ||
180 | skb = get_free_pkt(cm_node); | |
181 | if (!skb) { | |
182 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
183 | return -1; | |
184 | } | |
185 | ||
186 | /* send an MPA Request frame */ | |
187 | form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame, | |
188 | cm_node->mpa_frame_size, SET_ACK); | |
189 | ||
190 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
191 | if (ret < 0) { | |
192 | return ret; | |
193 | } | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | ||
199 | /** | |
200 | * recv_mpa - process a received TCP pkt, we are expecting an | |
201 | * IETF MPA frame | |
202 | */ | |
203 | static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 len) | |
204 | { | |
205 | struct ietf_mpa_frame *mpa_frame; | |
206 | ||
207 | /* assume req frame is in tcp data payload */ | |
208 | if (len < sizeof(struct ietf_mpa_frame)) { | |
209 | nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len); | |
210 | return -1; | |
211 | } | |
212 | ||
213 | mpa_frame = (struct ietf_mpa_frame *)buffer; | |
214 | cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len); | |
215 | ||
216 | if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) { | |
217 | nes_debug(NES_DBG_CM, "The received ietf buffer was not right" | |
218 | " complete (%x + %x != %x)\n", | |
219 | cm_node->mpa_frame_size, (u32)sizeof(struct ietf_mpa_frame), len); | |
220 | return -1; | |
221 | } | |
222 | ||
223 | /* copy entire MPA frame to our cm_node's frame */ | |
224 | memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame), | |
225 | cm_node->mpa_frame_size); | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
230 | ||
231 | /** | |
232 | * handle_exception_pkt - process an exception packet. | |
233 | * We have been in a TSA state, and we have now received SW | |
234 | * TCP/IP traffic should be a FIN request or IP pkt with options | |
235 | */ | |
236 | static int handle_exception_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb) | |
237 | { | |
238 | int ret = 0; | |
239 | struct tcphdr *tcph = tcp_hdr(skb); | |
240 | ||
241 | /* first check to see if this a FIN pkt */ | |
242 | if (tcph->fin) { | |
243 | /* we need to ACK the FIN request */ | |
244 | send_ack(cm_node); | |
245 | ||
246 | /* check which side we are (client/server) and set next state accordingly */ | |
247 | if (cm_node->tcp_cntxt.client) | |
248 | cm_node->state = NES_CM_STATE_CLOSING; | |
249 | else { | |
250 | /* we are the server side */ | |
251 | cm_node->state = NES_CM_STATE_CLOSE_WAIT; | |
252 | /* since this is a self contained CM we don't wait for */ | |
253 | /* an APP to close us, just send final FIN immediately */ | |
254 | ret = send_fin(cm_node, NULL); | |
255 | cm_node->state = NES_CM_STATE_LAST_ACK; | |
256 | } | |
257 | } else { | |
258 | ret = -EINVAL; | |
259 | } | |
260 | ||
261 | return ret; | |
262 | } | |
263 | ||
264 | ||
265 | /** | |
266 | * form_cm_frame - get a free packet and build empty frame Use | |
267 | * node info to build. | |
268 | */ | |
1a855fbf RD |
269 | static struct sk_buff *form_cm_frame(struct sk_buff *skb, struct nes_cm_node *cm_node, |
270 | void *options, u32 optionsize, void *data, | |
271 | u32 datasize, u8 flags) | |
3c2d774c GS |
272 | { |
273 | struct tcphdr *tcph; | |
274 | struct iphdr *iph; | |
275 | struct ethhdr *ethh; | |
276 | u8 *buf; | |
277 | u16 packetsize = sizeof(*iph); | |
278 | ||
279 | packetsize += sizeof(*tcph); | |
280 | packetsize += optionsize + datasize; | |
281 | ||
282 | memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph)); | |
283 | ||
284 | skb->len = 0; | |
285 | buf = skb_put(skb, packetsize + ETH_HLEN); | |
286 | ||
287 | ethh = (struct ethhdr *) buf; | |
288 | buf += ETH_HLEN; | |
289 | ||
290 | iph = (struct iphdr *)buf; | |
291 | buf += sizeof(*iph); | |
292 | tcph = (struct tcphdr *)buf; | |
293 | skb_reset_mac_header(skb); | |
294 | skb_set_network_header(skb, ETH_HLEN); | |
295 | skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph)); | |
296 | buf += sizeof(*tcph); | |
297 | ||
298 | skb->ip_summed = CHECKSUM_PARTIAL; | |
299 | skb->protocol = htons(0x800); | |
300 | skb->data_len = 0; | |
301 | skb->mac_len = ETH_HLEN; | |
302 | ||
303 | memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN); | |
304 | memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN); | |
305 | ethh->h_proto = htons(0x0800); | |
306 | ||
307 | iph->version = IPVERSION; | |
308 | iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ | |
309 | iph->tos = 0; | |
310 | iph->tot_len = htons(packetsize); | |
311 | iph->id = htons(++cm_node->tcp_cntxt.loc_id); | |
312 | ||
313 | iph->frag_off = htons(0x4000); | |
314 | iph->ttl = 0x40; | |
315 | iph->protocol = 0x06; /* IPPROTO_TCP */ | |
316 | ||
317 | iph->saddr = htonl(cm_node->loc_addr); | |
318 | iph->daddr = htonl(cm_node->rem_addr); | |
319 | ||
320 | tcph->source = htons(cm_node->loc_port); | |
321 | tcph->dest = htons(cm_node->rem_port); | |
322 | tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); | |
323 | ||
324 | if (flags & SET_ACK) { | |
325 | cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; | |
326 | tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); | |
327 | tcph->ack = 1; | |
328 | } else | |
329 | tcph->ack_seq = 0; | |
330 | ||
331 | if (flags & SET_SYN) { | |
332 | cm_node->tcp_cntxt.loc_seq_num++; | |
333 | tcph->syn = 1; | |
334 | } else | |
335 | cm_node->tcp_cntxt.loc_seq_num += datasize; /* data (no headers) */ | |
336 | ||
337 | if (flags & SET_FIN) | |
338 | tcph->fin = 1; | |
339 | ||
340 | if (flags & SET_RST) | |
341 | tcph->rst = 1; | |
342 | ||
343 | tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2); | |
344 | tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); | |
345 | tcph->urg_ptr = 0; | |
346 | if (optionsize) | |
347 | memcpy(buf, options, optionsize); | |
348 | buf += optionsize; | |
349 | if (datasize) | |
350 | memcpy(buf, data, datasize); | |
351 | ||
352 | skb_shinfo(skb)->nr_frags = 0; | |
353 | cm_packets_created++; | |
354 | ||
355 | return skb; | |
356 | } | |
357 | ||
358 | ||
359 | /** | |
360 | * print_core - dump a cm core | |
361 | */ | |
362 | static void print_core(struct nes_cm_core *core) | |
363 | { | |
364 | nes_debug(NES_DBG_CM, "---------------------------------------------\n"); | |
365 | nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core); | |
366 | if (!core) | |
367 | return; | |
368 | nes_debug(NES_DBG_CM, "---------------------------------------------\n"); | |
369 | nes_debug(NES_DBG_CM, "Session ID : %u \n", atomic_read(&core->session_id)); | |
370 | ||
371 | nes_debug(NES_DBG_CM, "State : %u \n", core->state); | |
372 | ||
373 | nes_debug(NES_DBG_CM, "Tx Free cnt : %u \n", skb_queue_len(&core->tx_free_list)); | |
374 | nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt)); | |
375 | nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt)); | |
376 | ||
377 | nes_debug(NES_DBG_CM, "core : %p \n", core); | |
378 | ||
379 | nes_debug(NES_DBG_CM, "-------------- end core ---------------\n"); | |
380 | } | |
381 | ||
382 | ||
383 | /** | |
384 | * schedule_nes_timer | |
385 | * note - cm_node needs to be protected before calling this. Encase in: | |
386 | * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node); | |
387 | */ | |
388 | int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb, | |
389 | enum nes_timer_type type, int send_retrans, | |
390 | int close_when_complete) | |
391 | { | |
392 | unsigned long flags; | |
393 | struct nes_cm_core *cm_core; | |
394 | struct nes_timer_entry *new_send; | |
395 | int ret = 0; | |
396 | u32 was_timer_set; | |
397 | ||
ed0ba33d AB |
398 | if (!cm_node) |
399 | return -EINVAL; | |
3c2d774c GS |
400 | new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); |
401 | if (!new_send) | |
402 | return -1; | |
3c2d774c GS |
403 | |
404 | /* new_send->timetosend = currenttime */ | |
405 | new_send->retrycount = NES_DEFAULT_RETRYS; | |
406 | new_send->retranscount = NES_DEFAULT_RETRANS; | |
407 | new_send->skb = skb; | |
408 | new_send->timetosend = jiffies; | |
409 | new_send->type = type; | |
410 | new_send->netdev = cm_node->netdev; | |
411 | new_send->send_retrans = send_retrans; | |
412 | new_send->close_when_complete = close_when_complete; | |
413 | ||
414 | if (type == NES_TIMER_TYPE_CLOSE) { | |
415 | new_send->timetosend += (HZ/2); /* TODO: decide on the correct value here */ | |
416 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
417 | list_add_tail(&new_send->list, &cm_node->recv_list); | |
418 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
419 | } | |
420 | ||
421 | if (type == NES_TIMER_TYPE_SEND) { | |
b30db1c1 | 422 | new_send->seq_num = ntohl(tcp_hdr(skb)->seq); |
3c2d774c GS |
423 | atomic_inc(&new_send->skb->users); |
424 | ||
425 | ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev); | |
426 | if (ret != NETDEV_TX_OK) { | |
427 | nes_debug(NES_DBG_CM, "Error sending packet %p (jiffies = %lu)\n", | |
428 | new_send, jiffies); | |
429 | atomic_dec(&new_send->skb->users); | |
430 | new_send->timetosend = jiffies; | |
431 | } else { | |
432 | cm_packets_sent++; | |
433 | if (!send_retrans) { | |
434 | if (close_when_complete) | |
435 | rem_ref_cm_node(cm_node->cm_core, cm_node); | |
436 | dev_kfree_skb_any(new_send->skb); | |
437 | kfree(new_send); | |
438 | return ret; | |
439 | } | |
440 | new_send->timetosend = jiffies + NES_RETRY_TIMEOUT; | |
441 | } | |
442 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
443 | list_add_tail(&new_send->list, &cm_node->retrans_list); | |
444 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
445 | } | |
446 | if (type == NES_TIMER_TYPE_RECV) { | |
b30db1c1 | 447 | new_send->seq_num = ntohl(tcp_hdr(skb)->seq); |
3c2d774c GS |
448 | new_send->timetosend = jiffies; |
449 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
450 | list_add_tail(&new_send->list, &cm_node->recv_list); | |
451 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
452 | } | |
453 | cm_core = cm_node->cm_core; | |
454 | ||
455 | was_timer_set = timer_pending(&cm_core->tcp_timer); | |
456 | ||
457 | if (!was_timer_set) { | |
458 | cm_core->tcp_timer.expires = new_send->timetosend; | |
459 | add_timer(&cm_core->tcp_timer); | |
460 | } | |
461 | ||
462 | return ret; | |
463 | } | |
464 | ||
465 | ||
466 | /** | |
467 | * nes_cm_timer_tick | |
468 | */ | |
1a855fbf | 469 | static void nes_cm_timer_tick(unsigned long pass) |
3c2d774c GS |
470 | { |
471 | unsigned long flags, qplockflags; | |
472 | unsigned long nexttimeout = jiffies + NES_LONG_TIME; | |
473 | struct iw_cm_id *cm_id; | |
474 | struct nes_cm_node *cm_node; | |
475 | struct nes_timer_entry *send_entry, *recv_entry; | |
476 | struct list_head *list_core, *list_core_temp; | |
477 | struct list_head *list_node, *list_node_temp; | |
478 | struct nes_cm_core *cm_core = g_cm_core; | |
479 | struct nes_qp *nesqp; | |
480 | struct sk_buff *skb; | |
481 | u32 settimer = 0; | |
482 | int ret = NETDEV_TX_OK; | |
483 | int node_done; | |
484 | ||
485 | spin_lock_irqsave(&cm_core->ht_lock, flags); | |
486 | ||
487 | list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) { | |
488 | cm_node = container_of(list_node, struct nes_cm_node, list); | |
489 | add_ref_cm_node(cm_node); | |
490 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
491 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
492 | list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) { | |
493 | recv_entry = container_of(list_core, struct nes_timer_entry, list); | |
494 | if ((time_after(recv_entry->timetosend, jiffies)) && | |
495 | (recv_entry->type == NES_TIMER_TYPE_CLOSE)) { | |
496 | if (nexttimeout > recv_entry->timetosend || !settimer) { | |
497 | nexttimeout = recv_entry->timetosend; | |
498 | settimer = 1; | |
499 | } | |
500 | continue; | |
501 | } | |
502 | list_del(&recv_entry->list); | |
503 | cm_id = cm_node->cm_id; | |
504 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
505 | if (recv_entry->type == NES_TIMER_TYPE_CLOSE) { | |
506 | nesqp = (struct nes_qp *)recv_entry->skb; | |
507 | spin_lock_irqsave(&nesqp->lock, qplockflags); | |
508 | if (nesqp->cm_id) { | |
509 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, refcount = %d: " | |
510 | "****** HIT A NES_TIMER_TYPE_CLOSE" | |
511 | " with something to do!!! ******\n", | |
512 | nesqp->hwqp.qp_id, cm_id, | |
513 | atomic_read(&nesqp->refcount)); | |
514 | nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED; | |
515 | nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT; | |
516 | nesqp->ibqp_state = IB_QPS_ERR; | |
517 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); | |
518 | nes_cm_disconn(nesqp); | |
519 | } else { | |
520 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); | |
521 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, refcount = %d:" | |
522 | " ****** HIT A NES_TIMER_TYPE_CLOSE" | |
523 | " with nothing to do!!! ******\n", | |
524 | nesqp->hwqp.qp_id, cm_id, | |
525 | atomic_read(&nesqp->refcount)); | |
526 | nes_rem_ref(&nesqp->ibqp); | |
527 | } | |
528 | if (cm_id) | |
529 | cm_id->rem_ref(cm_id); | |
530 | } | |
531 | kfree(recv_entry); | |
532 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
533 | } | |
534 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
535 | ||
536 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
537 | node_done = 0; | |
538 | list_for_each_safe(list_core, list_node_temp, &cm_node->retrans_list) { | |
539 | if (node_done) { | |
540 | break; | |
541 | } | |
542 | send_entry = container_of(list_core, struct nes_timer_entry, list); | |
543 | if (time_after(send_entry->timetosend, jiffies)) { | |
544 | if (cm_node->state != NES_CM_STATE_TSA) { | |
545 | if ((nexttimeout > send_entry->timetosend) || !settimer) { | |
546 | nexttimeout = send_entry->timetosend; | |
547 | settimer = 1; | |
548 | } | |
549 | node_done = 1; | |
550 | continue; | |
551 | } else { | |
552 | list_del(&send_entry->list); | |
553 | skb = send_entry->skb; | |
554 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
555 | dev_kfree_skb_any(skb); | |
556 | kfree(send_entry); | |
557 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
558 | continue; | |
559 | } | |
560 | } | |
561 | if (send_entry->type == NES_TIMER_NODE_CLEANUP) { | |
562 | list_del(&send_entry->list); | |
563 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
564 | kfree(send_entry); | |
565 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
566 | continue; | |
567 | } | |
568 | if ((send_entry->seq_num < cm_node->tcp_cntxt.rem_ack_num) || | |
569 | (cm_node->state == NES_CM_STATE_TSA) || | |
570 | (cm_node->state == NES_CM_STATE_CLOSED)) { | |
571 | skb = send_entry->skb; | |
572 | list_del(&send_entry->list); | |
573 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
574 | kfree(send_entry); | |
575 | dev_kfree_skb_any(skb); | |
576 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
577 | continue; | |
578 | } | |
579 | ||
580 | if (!send_entry->retranscount || !send_entry->retrycount) { | |
581 | cm_packets_dropped++; | |
582 | skb = send_entry->skb; | |
583 | list_del(&send_entry->list); | |
584 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
585 | dev_kfree_skb_any(skb); | |
586 | kfree(send_entry); | |
587 | if (cm_node->state == NES_CM_STATE_SYN_RCVD) { | |
588 | /* this node never even generated an indication up to the cm */ | |
589 | rem_ref_cm_node(cm_core, cm_node); | |
590 | } else { | |
591 | cm_node->state = NES_CM_STATE_CLOSED; | |
592 | create_event(cm_node, NES_CM_EVENT_ABORTED); | |
593 | } | |
594 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
595 | continue; | |
596 | } | |
597 | /* this seems like the correct place, but leave send entry unprotected */ | |
598 | // spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
599 | atomic_inc(&send_entry->skb->users); | |
600 | cm_packets_retrans++; | |
601 | nes_debug(NES_DBG_CM, "Retransmitting send_entry %p for node %p," | |
602 | " jiffies = %lu, time to send = %lu, retranscount = %u, " | |
603 | "send_entry->seq_num = 0x%08X, cm_node->tcp_cntxt.rem_ack_num = 0x%08X\n", | |
604 | send_entry, cm_node, jiffies, send_entry->timetosend, send_entry->retranscount, | |
605 | send_entry->seq_num, cm_node->tcp_cntxt.rem_ack_num); | |
606 | ||
607 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
608 | ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev); | |
609 | if (ret != NETDEV_TX_OK) { | |
610 | cm_packets_bounced++; | |
611 | atomic_dec(&send_entry->skb->users); | |
612 | send_entry->retrycount--; | |
613 | nexttimeout = jiffies + NES_SHORT_TIME; | |
614 | settimer = 1; | |
615 | node_done = 1; | |
616 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
617 | continue; | |
618 | } else { | |
619 | cm_packets_sent++; | |
620 | } | |
621 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
622 | list_del(&send_entry->list); | |
623 | nes_debug(NES_DBG_CM, "Packet Sent: retrans count = %u, retry count = %u.\n", | |
624 | send_entry->retranscount, send_entry->retrycount); | |
625 | if (send_entry->send_retrans) { | |
626 | send_entry->retranscount--; | |
627 | send_entry->timetosend = jiffies + NES_RETRY_TIMEOUT; | |
628 | if (nexttimeout > send_entry->timetosend || !settimer) { | |
629 | nexttimeout = send_entry->timetosend; | |
630 | settimer = 1; | |
631 | } | |
632 | list_add(&send_entry->list, &cm_node->retrans_list); | |
633 | continue; | |
634 | } else { | |
635 | int close_when_complete; | |
636 | skb = send_entry->skb; | |
637 | close_when_complete = send_entry->close_when_complete; | |
638 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
639 | if (close_when_complete) { | |
640 | BUG_ON(atomic_read(&cm_node->ref_count) == 1); | |
641 | rem_ref_cm_node(cm_core, cm_node); | |
642 | } | |
643 | dev_kfree_skb_any(skb); | |
644 | kfree(send_entry); | |
645 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
646 | continue; | |
647 | } | |
648 | } | |
649 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
650 | ||
651 | rem_ref_cm_node(cm_core, cm_node); | |
652 | ||
653 | spin_lock_irqsave(&cm_core->ht_lock, flags); | |
654 | if (ret != NETDEV_TX_OK) | |
655 | break; | |
656 | } | |
657 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
658 | ||
659 | if (settimer) { | |
660 | if (!timer_pending(&cm_core->tcp_timer)) { | |
661 | cm_core->tcp_timer.expires = nexttimeout; | |
662 | add_timer(&cm_core->tcp_timer); | |
663 | } | |
664 | } | |
665 | } | |
666 | ||
667 | ||
668 | /** | |
669 | * send_syn | |
670 | */ | |
1a855fbf | 671 | static int send_syn(struct nes_cm_node *cm_node, u32 sendack) |
3c2d774c GS |
672 | { |
673 | int ret; | |
674 | int flags = SET_SYN; | |
675 | struct sk_buff *skb; | |
676 | char optionsbuffer[sizeof(struct option_mss) + | |
677 | sizeof(struct option_windowscale) + | |
678 | sizeof(struct option_base) + 1]; | |
679 | ||
680 | int optionssize = 0; | |
681 | /* Sending MSS option */ | |
682 | union all_known_options *options; | |
683 | ||
684 | if (!cm_node) | |
685 | return -EINVAL; | |
686 | ||
687 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
688 | options->as_mss.optionnum = OPTION_NUMBER_MSS; | |
689 | options->as_mss.length = sizeof(struct option_mss); | |
690 | options->as_mss.mss = htons(cm_node->tcp_cntxt.mss); | |
691 | optionssize += sizeof(struct option_mss); | |
692 | ||
693 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
694 | options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE; | |
695 | options->as_windowscale.length = sizeof(struct option_windowscale); | |
696 | options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; | |
697 | optionssize += sizeof(struct option_windowscale); | |
698 | ||
699 | if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt) | |
700 | ) { | |
701 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
702 | options->as_base.optionnum = OPTION_NUMBER_WRITE0; | |
703 | options->as_base.length = sizeof(struct option_base); | |
704 | optionssize += sizeof(struct option_base); | |
705 | /* we need the size to be a multiple of 4 */ | |
706 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
707 | options->as_end = 1; | |
708 | optionssize += 1; | |
709 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
710 | options->as_end = 1; | |
711 | optionssize += 1; | |
712 | } | |
713 | ||
714 | options = (union all_known_options *)&optionsbuffer[optionssize]; | |
715 | options->as_end = OPTION_NUMBER_END; | |
716 | optionssize += 1; | |
717 | ||
718 | skb = get_free_pkt(cm_node); | |
719 | if (!skb) { | |
720 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
721 | return -1; | |
722 | } | |
723 | ||
724 | if (sendack) | |
725 | flags |= SET_ACK; | |
726 | ||
727 | form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags); | |
728 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
729 | ||
730 | return ret; | |
731 | } | |
732 | ||
733 | ||
734 | /** | |
735 | * send_reset | |
736 | */ | |
1a855fbf | 737 | static int send_reset(struct nes_cm_node *cm_node) |
3c2d774c GS |
738 | { |
739 | int ret; | |
740 | struct sk_buff *skb = get_free_pkt(cm_node); | |
741 | int flags = SET_RST | SET_ACK; | |
742 | ||
743 | if (!skb) { | |
744 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
745 | return -1; | |
746 | } | |
747 | ||
748 | add_ref_cm_node(cm_node); | |
749 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags); | |
750 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1); | |
751 | ||
752 | return ret; | |
753 | } | |
754 | ||
755 | ||
756 | /** | |
757 | * send_ack | |
758 | */ | |
1a855fbf | 759 | static int send_ack(struct nes_cm_node *cm_node) |
3c2d774c GS |
760 | { |
761 | int ret; | |
762 | struct sk_buff *skb = get_free_pkt(cm_node); | |
763 | ||
764 | if (!skb) { | |
765 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
766 | return -1; | |
767 | } | |
768 | ||
769 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK); | |
770 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0); | |
771 | ||
772 | return ret; | |
773 | } | |
774 | ||
775 | ||
776 | /** | |
777 | * send_fin | |
778 | */ | |
1a855fbf | 779 | static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb) |
3c2d774c GS |
780 | { |
781 | int ret; | |
782 | ||
783 | /* if we didn't get a frame get one */ | |
784 | if (!skb) | |
785 | skb = get_free_pkt(cm_node); | |
786 | ||
787 | if (!skb) { | |
788 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
789 | return -1; | |
790 | } | |
791 | ||
792 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN); | |
793 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
794 | ||
795 | return ret; | |
796 | } | |
797 | ||
798 | ||
799 | /** | |
800 | * get_free_pkt | |
801 | */ | |
1a855fbf | 802 | static struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node) |
3c2d774c GS |
803 | { |
804 | struct sk_buff *skb, *new_skb; | |
805 | ||
806 | /* check to see if we need to repopulate the free tx pkt queue */ | |
807 | if (skb_queue_len(&cm_node->cm_core->tx_free_list) < NES_CM_FREE_PKT_LO_WATERMARK) { | |
808 | while (skb_queue_len(&cm_node->cm_core->tx_free_list) < | |
809 | cm_node->cm_core->free_tx_pkt_max) { | |
810 | /* replace the frame we took, we won't get it back */ | |
811 | new_skb = dev_alloc_skb(cm_node->cm_core->mtu); | |
812 | BUG_ON(!new_skb); | |
813 | /* add a replacement frame to the free tx list head */ | |
814 | skb_queue_head(&cm_node->cm_core->tx_free_list, new_skb); | |
815 | } | |
816 | } | |
817 | ||
818 | skb = skb_dequeue(&cm_node->cm_core->tx_free_list); | |
819 | ||
820 | return skb; | |
821 | } | |
822 | ||
823 | ||
824 | /** | |
825 | * make_hashkey - generate hash key from node tuple | |
826 | */ | |
827 | static inline int make_hashkey(u16 loc_port, nes_addr_t loc_addr, u16 rem_port, | |
828 | nes_addr_t rem_addr) | |
829 | { | |
830 | u32 hashkey = 0; | |
831 | ||
832 | hashkey = loc_addr + rem_addr + loc_port + rem_port; | |
833 | hashkey = (hashkey % NES_CM_HASHTABLE_SIZE); | |
834 | ||
835 | return hashkey; | |
836 | } | |
837 | ||
838 | ||
839 | /** | |
840 | * find_node - find a cm node that matches the reference cm node | |
841 | */ | |
842 | static struct nes_cm_node *find_node(struct nes_cm_core *cm_core, | |
843 | u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr) | |
844 | { | |
845 | unsigned long flags; | |
846 | u32 hashkey; | |
847 | struct list_head *list_pos; | |
848 | struct list_head *hte; | |
849 | struct nes_cm_node *cm_node; | |
850 | ||
851 | /* make a hash index key for this packet */ | |
852 | hashkey = make_hashkey(loc_port, loc_addr, rem_port, rem_addr); | |
853 | ||
854 | /* get a handle on the hte */ | |
855 | hte = &cm_core->connected_nodes; | |
856 | ||
857 | nes_debug(NES_DBG_CM, "Searching for an owner node:%x:%x from core %p->%p\n", | |
858 | loc_addr, loc_port, cm_core, hte); | |
859 | ||
860 | /* walk list and find cm_node associated with this session ID */ | |
861 | spin_lock_irqsave(&cm_core->ht_lock, flags); | |
862 | list_for_each(list_pos, hte) { | |
863 | cm_node = container_of(list_pos, struct nes_cm_node, list); | |
864 | /* compare quad, return node handle if a match */ | |
865 | nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n", | |
866 | cm_node->loc_addr, cm_node->loc_port, | |
867 | loc_addr, loc_port, | |
868 | cm_node->rem_addr, cm_node->rem_port, | |
869 | rem_addr, rem_port); | |
870 | if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) && | |
871 | (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) { | |
872 | add_ref_cm_node(cm_node); | |
873 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
874 | return cm_node; | |
875 | } | |
876 | } | |
877 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
878 | ||
879 | /* no owner node */ | |
880 | return NULL; | |
881 | } | |
882 | ||
883 | ||
884 | /** | |
885 | * find_listener - find a cm node listening on this addr-port pair | |
886 | */ | |
887 | static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core, | |
888 | nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state) | |
889 | { | |
890 | unsigned long flags; | |
891 | struct list_head *listen_list; | |
892 | struct nes_cm_listener *listen_node; | |
893 | ||
894 | /* walk list and find cm_node associated with this session ID */ | |
895 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); | |
896 | list_for_each(listen_list, &cm_core->listen_list.list) { | |
897 | listen_node = container_of(listen_list, struct nes_cm_listener, list); | |
898 | /* compare node pair, return node handle if a match */ | |
899 | if (((listen_node->loc_addr == dst_addr) || | |
900 | listen_node->loc_addr == 0x00000000) && | |
901 | (listen_node->loc_port == dst_port) && | |
902 | (listener_state & listen_node->listener_state)) { | |
903 | atomic_inc(&listen_node->ref_count); | |
904 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
905 | return listen_node; | |
906 | } | |
907 | } | |
908 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
909 | ||
910 | nes_debug(NES_DBG_CM, "Unable to find listener- %x:%x\n", | |
911 | dst_addr, dst_port); | |
912 | ||
913 | /* no listener */ | |
914 | return NULL; | |
915 | } | |
916 | ||
917 | ||
918 | /** | |
919 | * add_hte_node - add a cm node to the hash table | |
920 | */ | |
921 | static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node) | |
922 | { | |
923 | unsigned long flags; | |
924 | u32 hashkey; | |
925 | struct list_head *hte; | |
926 | ||
927 | if (!cm_node || !cm_core) | |
928 | return -EINVAL; | |
929 | ||
930 | nes_debug(NES_DBG_CM, "Adding Node to Active Connection HT\n"); | |
931 | ||
932 | /* first, make an index into our hash table */ | |
933 | hashkey = make_hashkey(cm_node->loc_port, cm_node->loc_addr, | |
934 | cm_node->rem_port, cm_node->rem_addr); | |
935 | cm_node->hashkey = hashkey; | |
936 | ||
937 | spin_lock_irqsave(&cm_core->ht_lock, flags); | |
938 | ||
939 | /* get a handle on the hash table element (list head for this slot) */ | |
940 | hte = &cm_core->connected_nodes; | |
941 | list_add_tail(&cm_node->list, hte); | |
942 | atomic_inc(&cm_core->ht_node_cnt); | |
943 | ||
944 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); | |
945 | ||
946 | return 0; | |
947 | } | |
948 | ||
949 | ||
950 | /** | |
951 | * mini_cm_dec_refcnt_listen | |
952 | */ | |
953 | static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core, | |
954 | struct nes_cm_listener *listener, int free_hanging_nodes) | |
955 | { | |
956 | int ret = 1; | |
957 | unsigned long flags; | |
958 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); | |
959 | if (!atomic_dec_return(&listener->ref_count)) { | |
960 | list_del(&listener->list); | |
961 | ||
962 | /* decrement our listen node count */ | |
963 | atomic_dec(&cm_core->listen_node_cnt); | |
964 | ||
965 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
966 | ||
967 | if (listener->nesvnic) { | |
968 | nes_manage_apbvt(listener->nesvnic, listener->loc_port, | |
969 | PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL); | |
970 | } | |
971 | ||
972 | nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener); | |
973 | ||
974 | kfree(listener); | |
a2e9c384 | 975 | listener = NULL; |
3c2d774c GS |
976 | ret = 0; |
977 | cm_listens_destroyed++; | |
978 | } else { | |
979 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
980 | } | |
981 | if (listener) { | |
982 | if (atomic_read(&listener->pend_accepts_cnt) > 0) | |
983 | nes_debug(NES_DBG_CM, "destroying listener (%p)" | |
984 | " with non-zero pending accepts=%u\n", | |
985 | listener, atomic_read(&listener->pend_accepts_cnt)); | |
986 | } | |
987 | ||
988 | return ret; | |
989 | } | |
990 | ||
991 | ||
992 | /** | |
993 | * mini_cm_del_listen | |
994 | */ | |
995 | static int mini_cm_del_listen(struct nes_cm_core *cm_core, | |
996 | struct nes_cm_listener *listener) | |
997 | { | |
998 | listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE; | |
999 | listener->cm_id = NULL; /* going to be destroyed pretty soon */ | |
1000 | return mini_cm_dec_refcnt_listen(cm_core, listener, 1); | |
1001 | } | |
1002 | ||
1003 | ||
1004 | /** | |
1005 | * mini_cm_accelerated | |
1006 | */ | |
1007 | static inline int mini_cm_accelerated(struct nes_cm_core *cm_core, | |
1008 | struct nes_cm_node *cm_node) | |
1009 | { | |
1010 | u32 was_timer_set; | |
1011 | cm_node->accelerated = 1; | |
1012 | ||
1013 | if (cm_node->accept_pend) { | |
1014 | BUG_ON(!cm_node->listener); | |
1015 | atomic_dec(&cm_node->listener->pend_accepts_cnt); | |
1016 | BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0); | |
1017 | } | |
1018 | ||
1019 | was_timer_set = timer_pending(&cm_core->tcp_timer); | |
1020 | if (!was_timer_set) { | |
1021 | cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME; | |
1022 | add_timer(&cm_core->tcp_timer); | |
1023 | } | |
1024 | ||
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | ||
1029 | /** | |
1030 | * nes_addr_send_arp | |
1031 | */ | |
1032 | static void nes_addr_send_arp(u32 dst_ip) | |
1033 | { | |
1034 | struct rtable *rt; | |
1035 | struct flowi fl; | |
1036 | ||
1037 | memset(&fl, 0, sizeof fl); | |
1038 | fl.nl_u.ip4_u.daddr = htonl(dst_ip); | |
1039 | if (ip_route_output_key(&init_net, &rt, &fl)) { | |
1040 | printk("%s: ip_route_output_key failed for 0x%08X\n", | |
1041 | __FUNCTION__, dst_ip); | |
1042 | return; | |
1043 | } | |
1044 | ||
1045 | neigh_event_send(rt->u.dst.neighbour, NULL); | |
1046 | ip_rt_put(rt); | |
1047 | } | |
1048 | ||
1049 | ||
1050 | /** | |
1051 | * make_cm_node - create a new instance of a cm node | |
1052 | */ | |
1053 | static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core, | |
1054 | struct nes_vnic *nesvnic, struct nes_cm_info *cm_info, | |
1055 | struct nes_cm_listener *listener) | |
1056 | { | |
1057 | struct nes_cm_node *cm_node; | |
1058 | struct timespec ts; | |
1059 | int arpindex = 0; | |
1060 | struct nes_device *nesdev; | |
1061 | struct nes_adapter *nesadapter; | |
1062 | ||
1063 | /* create an hte and cm_node for this instance */ | |
1064 | cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); | |
1065 | if (!cm_node) | |
1066 | return NULL; | |
1067 | ||
1068 | /* set our node specific transport info */ | |
1069 | cm_node->loc_addr = cm_info->loc_addr; | |
1070 | cm_node->rem_addr = cm_info->rem_addr; | |
1071 | cm_node->loc_port = cm_info->loc_port; | |
1072 | cm_node->rem_port = cm_info->rem_port; | |
1073 | cm_node->send_write0 = send_first; | |
1074 | nes_debug(NES_DBG_CM, "Make node addresses : loc = %x:%x, rem = %x:%x\n", | |
1075 | cm_node->loc_addr, cm_node->loc_port, cm_node->rem_addr, cm_node->rem_port); | |
1076 | cm_node->listener = listener; | |
1077 | cm_node->netdev = nesvnic->netdev; | |
1078 | cm_node->cm_id = cm_info->cm_id; | |
1079 | memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN); | |
1080 | ||
1081 | nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", | |
1082 | cm_node->listener, cm_node->cm_id); | |
1083 | ||
1084 | INIT_LIST_HEAD(&cm_node->retrans_list); | |
1085 | spin_lock_init(&cm_node->retrans_list_lock); | |
1086 | INIT_LIST_HEAD(&cm_node->recv_list); | |
1087 | spin_lock_init(&cm_node->recv_list_lock); | |
1088 | ||
1089 | cm_node->loopbackpartner = NULL; | |
1090 | atomic_set(&cm_node->ref_count, 1); | |
1091 | /* associate our parent CM core */ | |
1092 | cm_node->cm_core = cm_core; | |
1093 | cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID; | |
1094 | cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE; | |
1095 | cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >> | |
1096 | NES_CM_DEFAULT_RCV_WND_SCALE; | |
1097 | ts = current_kernel_time(); | |
1098 | cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec); | |
1099 | cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) - | |
f2b2b59b | 1100 | sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN; |
3c2d774c GS |
1101 | cm_node->tcp_cntxt.rcv_nxt = 0; |
1102 | /* get a unique session ID , add thread_id to an upcounter to handle race */ | |
1103 | atomic_inc(&cm_core->node_cnt); | |
1104 | atomic_inc(&cm_core->session_id); | |
1105 | cm_node->session_id = (u32)(atomic_read(&cm_core->session_id) + current->tgid); | |
1106 | cm_node->conn_type = cm_info->conn_type; | |
1107 | cm_node->apbvt_set = 0; | |
1108 | cm_node->accept_pend = 0; | |
1109 | ||
1110 | cm_node->nesvnic = nesvnic; | |
1111 | /* get some device handles, for arp lookup */ | |
1112 | nesdev = nesvnic->nesdev; | |
1113 | nesadapter = nesdev->nesadapter; | |
1114 | ||
1115 | cm_node->loopbackpartner = NULL; | |
1116 | /* get the mac addr for the remote node */ | |
1117 | arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE); | |
1118 | if (arpindex < 0) { | |
1119 | kfree(cm_node); | |
1120 | nes_addr_send_arp(cm_info->rem_addr); | |
1121 | return NULL; | |
1122 | } | |
1123 | ||
1124 | /* copy the mac addr to node context */ | |
1125 | memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN); | |
1126 | nes_debug(NES_DBG_CM, "Remote mac addr from arp table:%02x," | |
1127 | " %02x, %02x, %02x, %02x, %02x\n", | |
1128 | cm_node->rem_mac[0], cm_node->rem_mac[1], | |
1129 | cm_node->rem_mac[2], cm_node->rem_mac[3], | |
1130 | cm_node->rem_mac[4], cm_node->rem_mac[5]); | |
1131 | ||
1132 | add_hte_node(cm_core, cm_node); | |
1133 | atomic_inc(&cm_nodes_created); | |
1134 | ||
1135 | return cm_node; | |
1136 | } | |
1137 | ||
1138 | ||
1139 | /** | |
1140 | * add_ref_cm_node - destroy an instance of a cm node | |
1141 | */ | |
1142 | static int add_ref_cm_node(struct nes_cm_node *cm_node) | |
1143 | { | |
1144 | atomic_inc(&cm_node->ref_count); | |
1145 | return 0; | |
1146 | } | |
1147 | ||
1148 | ||
1149 | /** | |
1150 | * rem_ref_cm_node - destroy an instance of a cm node | |
1151 | */ | |
1152 | static int rem_ref_cm_node(struct nes_cm_core *cm_core, | |
1153 | struct nes_cm_node *cm_node) | |
1154 | { | |
1155 | unsigned long flags, qplockflags; | |
1156 | struct nes_timer_entry *send_entry; | |
1157 | struct nes_timer_entry *recv_entry; | |
1158 | struct iw_cm_id *cm_id; | |
1159 | struct list_head *list_core, *list_node_temp; | |
1160 | struct nes_qp *nesqp; | |
1161 | ||
1162 | if (!cm_node) | |
1163 | return -EINVAL; | |
1164 | ||
1165 | spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags); | |
1166 | if (atomic_dec_return(&cm_node->ref_count)) { | |
1167 | spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); | |
1168 | return 0; | |
1169 | } | |
1170 | list_del(&cm_node->list); | |
1171 | atomic_dec(&cm_core->ht_node_cnt); | |
1172 | spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); | |
1173 | ||
1174 | /* if the node is destroyed before connection was accelerated */ | |
1175 | if (!cm_node->accelerated && cm_node->accept_pend) { | |
1176 | BUG_ON(!cm_node->listener); | |
1177 | atomic_dec(&cm_node->listener->pend_accepts_cnt); | |
1178 | BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0); | |
1179 | } | |
1180 | ||
1181 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
1182 | list_for_each_safe(list_core, list_node_temp, &cm_node->retrans_list) { | |
1183 | send_entry = container_of(list_core, struct nes_timer_entry, list); | |
1184 | list_del(&send_entry->list); | |
1185 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
1186 | dev_kfree_skb_any(send_entry->skb); | |
1187 | kfree(send_entry); | |
1188 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); | |
1189 | continue; | |
1190 | } | |
1191 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); | |
1192 | ||
1193 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
1194 | list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) { | |
1195 | recv_entry = container_of(list_core, struct nes_timer_entry, list); | |
1196 | list_del(&recv_entry->list); | |
1197 | cm_id = cm_node->cm_id; | |
1198 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
1199 | if (recv_entry->type == NES_TIMER_TYPE_CLOSE) { | |
1200 | nesqp = (struct nes_qp *)recv_entry->skb; | |
1201 | spin_lock_irqsave(&nesqp->lock, qplockflags); | |
1202 | if (nesqp->cm_id) { | |
1203 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: ****** HIT A NES_TIMER_TYPE_CLOSE" | |
1204 | " with something to do!!! ******\n", | |
1205 | nesqp->hwqp.qp_id, cm_id); | |
1206 | nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED; | |
1207 | nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT; | |
1208 | nesqp->ibqp_state = IB_QPS_ERR; | |
1209 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); | |
1210 | nes_cm_disconn(nesqp); | |
1211 | } else { | |
1212 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); | |
1213 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: ****** HIT A NES_TIMER_TYPE_CLOSE" | |
1214 | " with nothing to do!!! ******\n", | |
1215 | nesqp->hwqp.qp_id, cm_id); | |
1216 | nes_rem_ref(&nesqp->ibqp); | |
1217 | } | |
1218 | cm_id->rem_ref(cm_id); | |
1219 | } else if (recv_entry->type == NES_TIMER_TYPE_RECV) { | |
1220 | dev_kfree_skb_any(recv_entry->skb); | |
1221 | } | |
1222 | kfree(recv_entry); | |
1223 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); | |
1224 | } | |
1225 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); | |
1226 | ||
1227 | if (cm_node->listener) { | |
1228 | mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0); | |
1229 | } else { | |
1230 | if (cm_node->apbvt_set && cm_node->nesvnic) { | |
1231 | nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port, | |
1232 | PCI_FUNC(cm_node->nesvnic->nesdev->pcidev->devfn), | |
1233 | NES_MANAGE_APBVT_DEL); | |
1234 | } | |
1235 | } | |
1236 | ||
1237 | kfree(cm_node); | |
1238 | atomic_dec(&cm_core->node_cnt); | |
1239 | atomic_inc(&cm_nodes_destroyed); | |
1240 | ||
1241 | return 0; | |
1242 | } | |
1243 | ||
1244 | ||
1245 | /** | |
1246 | * process_options | |
1247 | */ | |
1248 | static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc, u32 optionsize, u32 syn_packet) | |
1249 | { | |
1250 | u32 tmp; | |
1251 | u32 offset = 0; | |
1252 | union all_known_options *all_options; | |
1253 | char got_mss_option = 0; | |
1254 | ||
1255 | while (offset < optionsize) { | |
1256 | all_options = (union all_known_options *)(optionsloc + offset); | |
1257 | switch (all_options->as_base.optionnum) { | |
1258 | case OPTION_NUMBER_END: | |
1259 | offset = optionsize; | |
1260 | break; | |
1261 | case OPTION_NUMBER_NONE: | |
1262 | offset += 1; | |
1263 | continue; | |
1264 | case OPTION_NUMBER_MSS: | |
1265 | nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d Size: %d\n", | |
1266 | __FUNCTION__, | |
1267 | all_options->as_mss.length, offset, optionsize); | |
1268 | got_mss_option = 1; | |
1269 | if (all_options->as_mss.length != 4) { | |
1270 | return 1; | |
1271 | } else { | |
1272 | tmp = ntohs(all_options->as_mss.mss); | |
1273 | if (tmp > 0 && tmp < cm_node->tcp_cntxt.mss) | |
1274 | cm_node->tcp_cntxt.mss = tmp; | |
1275 | } | |
1276 | break; | |
1277 | case OPTION_NUMBER_WINDOW_SCALE: | |
1278 | cm_node->tcp_cntxt.snd_wscale = all_options->as_windowscale.shiftcount; | |
1279 | break; | |
1280 | case OPTION_NUMBER_WRITE0: | |
1281 | cm_node->send_write0 = 1; | |
1282 | break; | |
1283 | default: | |
1284 | nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n", | |
1285 | all_options->as_base.optionnum); | |
1286 | break; | |
1287 | } | |
1288 | offset += all_options->as_base.length; | |
1289 | } | |
1290 | if ((!got_mss_option) && (syn_packet)) | |
1291 | cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS; | |
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | ||
1296 | /** | |
1297 | * process_packet | |
1298 | */ | |
1a855fbf RD |
1299 | static int process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb, |
1300 | struct nes_cm_core *cm_core) | |
3c2d774c GS |
1301 | { |
1302 | int optionsize; | |
1303 | int datasize; | |
1304 | int ret = 0; | |
1305 | struct tcphdr *tcph = tcp_hdr(skb); | |
1306 | u32 inc_sequence; | |
1307 | if (cm_node->state == NES_CM_STATE_SYN_SENT && tcph->syn) { | |
1308 | inc_sequence = ntohl(tcph->seq); | |
1309 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence; | |
1310 | } | |
1311 | ||
1312 | if ((!tcph) || (cm_node->state == NES_CM_STATE_TSA)) { | |
1313 | BUG_ON(!tcph); | |
1314 | atomic_inc(&cm_accel_dropped_pkts); | |
1315 | return -1; | |
1316 | } | |
1317 | ||
1318 | if (tcph->rst) { | |
1319 | atomic_inc(&cm_resets_recvd); | |
1320 | nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u. refcnt=%d\n", | |
1321 | cm_node, cm_node->state, atomic_read(&cm_node->ref_count)); | |
1322 | switch (cm_node->state) { | |
1323 | case NES_CM_STATE_LISTENING: | |
1324 | rem_ref_cm_node(cm_core, cm_node); | |
1325 | break; | |
1326 | case NES_CM_STATE_TSA: | |
1327 | case NES_CM_STATE_CLOSED: | |
1328 | break; | |
1329 | case NES_CM_STATE_SYN_RCVD: | |
1330 | nes_debug(NES_DBG_CM, "Received a reset for local 0x%08X:%04X," | |
1331 | " remote 0x%08X:%04X, node state = %u\n", | |
1332 | cm_node->loc_addr, cm_node->loc_port, | |
1333 | cm_node->rem_addr, cm_node->rem_port, | |
1334 | cm_node->state); | |
1335 | rem_ref_cm_node(cm_core, cm_node); | |
1336 | break; | |
1337 | case NES_CM_STATE_ONE_SIDE_ESTABLISHED: | |
1338 | case NES_CM_STATE_ESTABLISHED: | |
1339 | case NES_CM_STATE_MPAREQ_SENT: | |
1340 | default: | |
1341 | nes_debug(NES_DBG_CM, "Received a reset for local 0x%08X:%04X," | |
1342 | " remote 0x%08X:%04X, node state = %u refcnt=%d\n", | |
1343 | cm_node->loc_addr, cm_node->loc_port, | |
1344 | cm_node->rem_addr, cm_node->rem_port, | |
1345 | cm_node->state, atomic_read(&cm_node->ref_count)); | |
1346 | // create event | |
1347 | cm_node->state = NES_CM_STATE_CLOSED; | |
1348 | ||
1349 | create_event(cm_node, NES_CM_EVENT_ABORTED); | |
1350 | break; | |
1351 | ||
1352 | } | |
1353 | return -1; | |
1354 | } | |
1355 | ||
1356 | optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); | |
1357 | ||
1358 | skb_pull(skb, ip_hdr(skb)->ihl << 2); | |
1359 | skb_pull(skb, tcph->doff << 2); | |
1360 | ||
1361 | datasize = skb->len; | |
1362 | inc_sequence = ntohl(tcph->seq); | |
1363 | nes_debug(NES_DBG_CM, "datasize = %u, sequence = 0x%08X, ack_seq = 0x%08X," | |
1364 | " rcv_nxt = 0x%08X Flags: %s %s.\n", | |
1365 | datasize, inc_sequence, ntohl(tcph->ack_seq), | |
1366 | cm_node->tcp_cntxt.rcv_nxt, (tcph->syn ? "SYN":""), | |
1367 | (tcph->ack ? "ACK":"")); | |
1368 | ||
1369 | if (!tcph->syn && (inc_sequence != cm_node->tcp_cntxt.rcv_nxt) | |
1370 | ) { | |
1371 | nes_debug(NES_DBG_CM, "dropping packet, datasize = %u, sequence = 0x%08X," | |
1372 | " ack_seq = 0x%08X, rcv_nxt = 0x%08X Flags: %s.\n", | |
1373 | datasize, inc_sequence, ntohl(tcph->ack_seq), | |
1374 | cm_node->tcp_cntxt.rcv_nxt, (tcph->ack ? "ACK":"")); | |
1375 | if (cm_node->state == NES_CM_STATE_LISTENING) { | |
1376 | rem_ref_cm_node(cm_core, cm_node); | |
1377 | } | |
1378 | return -1; | |
1379 | } | |
1380 | ||
1381 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; | |
1382 | ||
1383 | ||
1384 | if (optionsize) { | |
1385 | u8 *optionsloc = (u8 *)&tcph[1]; | |
1386 | if (process_options(cm_node, optionsloc, optionsize, (u32)tcph->syn)) { | |
1387 | nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n", __FUNCTION__, cm_node); | |
1388 | send_reset(cm_node); | |
1389 | if (cm_node->state != NES_CM_STATE_SYN_SENT) | |
1390 | rem_ref_cm_node(cm_core, cm_node); | |
1391 | return 0; | |
1392 | } | |
1393 | } else if (tcph->syn) | |
1394 | cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS; | |
1395 | ||
1396 | cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) << | |
1397 | cm_node->tcp_cntxt.snd_wscale; | |
1398 | ||
1399 | if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) { | |
1400 | cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; | |
1401 | } | |
1402 | ||
1403 | if (tcph->ack) { | |
1404 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); | |
1405 | switch (cm_node->state) { | |
1406 | case NES_CM_STATE_SYN_RCVD: | |
1407 | case NES_CM_STATE_SYN_SENT: | |
1408 | /* read and stash current sequence number */ | |
1409 | if (cm_node->tcp_cntxt.rem_ack_num != cm_node->tcp_cntxt.loc_seq_num) { | |
1410 | nes_debug(NES_DBG_CM, "ERROR - cm_node->tcp_cntxt.rem_ack_num !=" | |
1411 | " cm_node->tcp_cntxt.loc_seq_num\n"); | |
1412 | send_reset(cm_node); | |
1413 | return 0; | |
1414 | } | |
1415 | if (cm_node->state == NES_CM_STATE_SYN_SENT) | |
1416 | cm_node->state = NES_CM_STATE_ONE_SIDE_ESTABLISHED; | |
1417 | else { | |
1418 | cm_node->state = NES_CM_STATE_ESTABLISHED; | |
1419 | } | |
1420 | break; | |
1421 | case NES_CM_STATE_LAST_ACK: | |
1422 | cm_node->state = NES_CM_STATE_CLOSED; | |
1423 | break; | |
1424 | case NES_CM_STATE_FIN_WAIT1: | |
1425 | cm_node->state = NES_CM_STATE_FIN_WAIT2; | |
1426 | break; | |
1427 | case NES_CM_STATE_CLOSING: | |
1428 | cm_node->state = NES_CM_STATE_TIME_WAIT; | |
1429 | /* need to schedule this to happen in 2MSL timeouts */ | |
1430 | cm_node->state = NES_CM_STATE_CLOSED; | |
1431 | break; | |
1432 | case NES_CM_STATE_ONE_SIDE_ESTABLISHED: | |
1433 | case NES_CM_STATE_ESTABLISHED: | |
1434 | case NES_CM_STATE_MPAREQ_SENT: | |
1435 | case NES_CM_STATE_CLOSE_WAIT: | |
1436 | case NES_CM_STATE_TIME_WAIT: | |
1437 | case NES_CM_STATE_CLOSED: | |
1438 | break; | |
1439 | case NES_CM_STATE_LISTENING: | |
1440 | nes_debug(NES_DBG_CM, "Received an ACK on a listening port (SYN %d)\n", tcph->syn); | |
1441 | cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); | |
1442 | send_reset(cm_node); | |
1443 | /* send_reset bumps refcount, this should have been a new node */ | |
1444 | rem_ref_cm_node(cm_core, cm_node); | |
1445 | return -1; | |
1446 | break; | |
1447 | case NES_CM_STATE_TSA: | |
1448 | nes_debug(NES_DBG_CM, "Received a packet with the ack bit set while in TSA state\n"); | |
1449 | break; | |
1450 | case NES_CM_STATE_UNKNOWN: | |
1451 | case NES_CM_STATE_INITED: | |
1452 | case NES_CM_STATE_ACCEPTING: | |
1453 | case NES_CM_STATE_FIN_WAIT2: | |
1454 | default: | |
1455 | nes_debug(NES_DBG_CM, "Received ack from unknown state: %x\n", | |
1456 | cm_node->state); | |
1457 | send_reset(cm_node); | |
1458 | break; | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | if (tcph->syn) { | |
1463 | if (cm_node->state == NES_CM_STATE_LISTENING) { | |
1464 | /* do not exceed backlog */ | |
1465 | atomic_inc(&cm_node->listener->pend_accepts_cnt); | |
1466 | if (atomic_read(&cm_node->listener->pend_accepts_cnt) > | |
1467 | cm_node->listener->backlog) { | |
1468 | nes_debug(NES_DBG_CM, "drop syn due to backlog pressure \n"); | |
1469 | cm_backlog_drops++; | |
1470 | atomic_dec(&cm_node->listener->pend_accepts_cnt); | |
1471 | rem_ref_cm_node(cm_core, cm_node); | |
1472 | return 0; | |
1473 | } | |
1474 | cm_node->accept_pend = 1; | |
1475 | ||
1476 | } | |
1477 | if (datasize == 0) | |
1478 | cm_node->tcp_cntxt.rcv_nxt ++; | |
1479 | ||
1480 | if (cm_node->state == NES_CM_STATE_LISTENING) { | |
1481 | cm_node->state = NES_CM_STATE_SYN_RCVD; | |
1482 | send_syn(cm_node, 1); | |
1483 | } | |
1484 | if (cm_node->state == NES_CM_STATE_ONE_SIDE_ESTABLISHED) { | |
1485 | cm_node->state = NES_CM_STATE_ESTABLISHED; | |
1486 | /* send final handshake ACK */ | |
1487 | ret = send_ack(cm_node); | |
1488 | if (ret < 0) | |
1489 | return ret; | |
1490 | ||
1491 | cm_node->state = NES_CM_STATE_MPAREQ_SENT; | |
1492 | ret = send_mpa_request(cm_node); | |
1493 | if (ret < 0) | |
1494 | return ret; | |
1495 | } | |
1496 | } | |
1497 | ||
1498 | if (tcph->fin) { | |
1499 | cm_node->tcp_cntxt.rcv_nxt++; | |
1500 | switch (cm_node->state) { | |
1501 | case NES_CM_STATE_SYN_RCVD: | |
1502 | case NES_CM_STATE_SYN_SENT: | |
1503 | case NES_CM_STATE_ONE_SIDE_ESTABLISHED: | |
1504 | case NES_CM_STATE_ESTABLISHED: | |
1505 | case NES_CM_STATE_ACCEPTING: | |
1506 | case NES_CM_STATE_MPAREQ_SENT: | |
1507 | cm_node->state = NES_CM_STATE_CLOSE_WAIT; | |
1508 | cm_node->state = NES_CM_STATE_LAST_ACK; | |
1509 | ret = send_fin(cm_node, NULL); | |
1510 | break; | |
1511 | case NES_CM_STATE_FIN_WAIT1: | |
1512 | cm_node->state = NES_CM_STATE_CLOSING; | |
1513 | ret = send_ack(cm_node); | |
1514 | break; | |
1515 | case NES_CM_STATE_FIN_WAIT2: | |
1516 | cm_node->state = NES_CM_STATE_TIME_WAIT; | |
1517 | cm_node->tcp_cntxt.loc_seq_num ++; | |
1518 | ret = send_ack(cm_node); | |
1519 | /* need to schedule this to happen in 2MSL timeouts */ | |
1520 | cm_node->state = NES_CM_STATE_CLOSED; | |
1521 | break; | |
1522 | case NES_CM_STATE_CLOSE_WAIT: | |
1523 | case NES_CM_STATE_LAST_ACK: | |
1524 | case NES_CM_STATE_CLOSING: | |
1525 | case NES_CM_STATE_TSA: | |
1526 | default: | |
1527 | nes_debug(NES_DBG_CM, "Received a fin while in %x state\n", | |
1528 | cm_node->state); | |
1529 | ret = -EINVAL; | |
1530 | break; | |
1531 | } | |
1532 | } | |
1533 | ||
1534 | if (datasize) { | |
1535 | u8 *dataloc = skb->data; | |
1536 | /* figure out what state we are in and handle transition to next state */ | |
1537 | switch (cm_node->state) { | |
1538 | case NES_CM_STATE_LISTENING: | |
1539 | case NES_CM_STATE_SYN_RCVD: | |
1540 | case NES_CM_STATE_SYN_SENT: | |
1541 | case NES_CM_STATE_FIN_WAIT1: | |
1542 | case NES_CM_STATE_FIN_WAIT2: | |
1543 | case NES_CM_STATE_CLOSE_WAIT: | |
1544 | case NES_CM_STATE_LAST_ACK: | |
1545 | case NES_CM_STATE_CLOSING: | |
1546 | break; | |
1547 | case NES_CM_STATE_MPAREQ_SENT: | |
1548 | /* recv the mpa res frame, ret=frame len (incl priv data) */ | |
1549 | ret = parse_mpa(cm_node, dataloc, datasize); | |
1550 | if (ret < 0) | |
1551 | break; | |
1552 | /* set the req frame payload len in skb */ | |
1553 | /* we are done handling this state, set node to a TSA state */ | |
1554 | cm_node->state = NES_CM_STATE_TSA; | |
1555 | send_ack(cm_node); | |
1556 | create_event(cm_node, NES_CM_EVENT_CONNECTED); | |
1557 | break; | |
1558 | ||
1559 | case NES_CM_STATE_ESTABLISHED: | |
1560 | /* we are expecting an MPA req frame */ | |
1561 | ret = parse_mpa(cm_node, dataloc, datasize); | |
1562 | if (ret < 0) { | |
1563 | break; | |
1564 | } | |
1565 | cm_node->state = NES_CM_STATE_TSA; | |
1566 | send_ack(cm_node); | |
1567 | /* we got a valid MPA request, create an event */ | |
1568 | create_event(cm_node, NES_CM_EVENT_MPA_REQ); | |
1569 | break; | |
1570 | case NES_CM_STATE_TSA: | |
1571 | handle_exception_pkt(cm_node, skb); | |
1572 | break; | |
1573 | case NES_CM_STATE_UNKNOWN: | |
1574 | case NES_CM_STATE_INITED: | |
1575 | default: | |
1576 | ret = -1; | |
1577 | } | |
1578 | } | |
1579 | ||
1580 | return ret; | |
1581 | } | |
1582 | ||
1583 | ||
1584 | /** | |
1585 | * mini_cm_listen - create a listen node with params | |
1586 | */ | |
1587 | static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core, | |
1588 | struct nes_vnic *nesvnic, struct nes_cm_info *cm_info) | |
1589 | { | |
1590 | struct nes_cm_listener *listener; | |
1591 | unsigned long flags; | |
1592 | ||
1593 | nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n", | |
1594 | cm_info->loc_addr, cm_info->loc_port); | |
1595 | ||
1596 | /* cannot have multiple matching listeners */ | |
1597 | listener = find_listener(cm_core, htonl(cm_info->loc_addr), | |
1598 | htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE); | |
1599 | if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) { | |
1600 | /* find automatically incs ref count ??? */ | |
1601 | atomic_dec(&listener->ref_count); | |
1602 | nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n"); | |
1603 | return NULL; | |
1604 | } | |
1605 | ||
1606 | if (!listener) { | |
1607 | /* create a CM listen node (1/2 node to compare incoming traffic to) */ | |
1608 | listener = kzalloc(sizeof(*listener), GFP_ATOMIC); | |
1609 | if (!listener) { | |
1610 | nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n"); | |
1611 | return NULL; | |
1612 | } | |
1613 | ||
1614 | memset(listener, 0, sizeof(struct nes_cm_listener)); | |
1615 | listener->loc_addr = htonl(cm_info->loc_addr); | |
1616 | listener->loc_port = htons(cm_info->loc_port); | |
1617 | listener->reused_node = 0; | |
1618 | ||
1619 | atomic_set(&listener->ref_count, 1); | |
1620 | } | |
1621 | /* pasive case */ | |
1622 | /* find already inc'ed the ref count */ | |
1623 | else { | |
1624 | listener->reused_node = 1; | |
1625 | } | |
1626 | ||
1627 | listener->cm_id = cm_info->cm_id; | |
1628 | atomic_set(&listener->pend_accepts_cnt, 0); | |
1629 | listener->cm_core = cm_core; | |
1630 | listener->nesvnic = nesvnic; | |
1631 | atomic_inc(&cm_core->node_cnt); | |
1632 | atomic_inc(&cm_core->session_id); | |
1633 | ||
1634 | listener->session_id = (u32)(atomic_read(&cm_core->session_id) + current->tgid); | |
1635 | listener->conn_type = cm_info->conn_type; | |
1636 | listener->backlog = cm_info->backlog; | |
1637 | listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE; | |
1638 | ||
1639 | if (!listener->reused_node) { | |
1640 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); | |
1641 | list_add(&listener->list, &cm_core->listen_list.list); | |
1642 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); | |
1643 | atomic_inc(&cm_core->listen_node_cnt); | |
1644 | } | |
1645 | ||
1646 | nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x," | |
1647 | " listener = %p, backlog = %d, cm_id = %p.\n", | |
1648 | cm_info->loc_addr, cm_info->loc_port, | |
1649 | listener, listener->backlog, listener->cm_id); | |
1650 | ||
1651 | return listener; | |
1652 | } | |
1653 | ||
1654 | ||
1655 | /** | |
1656 | * mini_cm_connect - make a connection node with params | |
1657 | */ | |
1a855fbf RD |
1658 | static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core, |
1659 | struct nes_vnic *nesvnic, | |
1660 | struct ietf_mpa_frame *mpa_frame, | |
1661 | struct nes_cm_info *cm_info) | |
3c2d774c GS |
1662 | { |
1663 | int ret = 0; | |
1664 | struct nes_cm_node *cm_node; | |
1665 | struct nes_cm_listener *loopbackremotelistener; | |
1666 | struct nes_cm_node *loopbackremotenode; | |
1667 | struct nes_cm_info loopback_cm_info; | |
1668 | ||
1669 | u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + | |
1670 | ntohs(mpa_frame->priv_data_len); | |
1671 | ||
1672 | cm_info->loc_addr = htonl(cm_info->loc_addr); | |
1673 | cm_info->rem_addr = htonl(cm_info->rem_addr); | |
1674 | cm_info->loc_port = htons(cm_info->loc_port); | |
1675 | cm_info->rem_port = htons(cm_info->rem_port); | |
1676 | ||
1677 | /* create a CM connection node */ | |
1678 | cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL); | |
1679 | if (!cm_node) | |
1680 | return NULL; | |
1681 | ||
1682 | // set our node side to client (active) side | |
1683 | cm_node->tcp_cntxt.client = 1; | |
1684 | cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE; | |
1685 | ||
1686 | if (cm_info->loc_addr == cm_info->rem_addr) { | |
1687 | loopbackremotelistener = find_listener(cm_core, cm_node->rem_addr, | |
1688 | cm_node->rem_port, NES_CM_LISTENER_ACTIVE_STATE); | |
1689 | if (loopbackremotelistener == NULL) { | |
1690 | create_event(cm_node, NES_CM_EVENT_ABORTED); | |
1691 | } else { | |
1692 | atomic_inc(&cm_loopbacks); | |
1693 | loopback_cm_info = *cm_info; | |
1694 | loopback_cm_info.loc_port = cm_info->rem_port; | |
1695 | loopback_cm_info.rem_port = cm_info->loc_port; | |
1696 | loopback_cm_info.cm_id = loopbackremotelistener->cm_id; | |
1697 | loopbackremotenode = make_cm_node(cm_core, nesvnic, &loopback_cm_info, | |
1698 | loopbackremotelistener); | |
1699 | loopbackremotenode->loopbackpartner = cm_node; | |
1700 | loopbackremotenode->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE; | |
1701 | cm_node->loopbackpartner = loopbackremotenode; | |
1702 | memcpy(loopbackremotenode->mpa_frame_buf, &mpa_frame->priv_data, | |
1703 | mpa_frame_size); | |
1704 | loopbackremotenode->mpa_frame_size = mpa_frame_size - | |
1705 | sizeof(struct ietf_mpa_frame); | |
1706 | ||
1707 | // we are done handling this state, set node to a TSA state | |
1708 | cm_node->state = NES_CM_STATE_TSA; | |
1709 | cm_node->tcp_cntxt.rcv_nxt = loopbackremotenode->tcp_cntxt.loc_seq_num; | |
1710 | loopbackremotenode->tcp_cntxt.rcv_nxt = cm_node->tcp_cntxt.loc_seq_num; | |
1711 | cm_node->tcp_cntxt.max_snd_wnd = loopbackremotenode->tcp_cntxt.rcv_wnd; | |
1712 | loopbackremotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd; | |
1713 | cm_node->tcp_cntxt.snd_wnd = loopbackremotenode->tcp_cntxt.rcv_wnd; | |
1714 | loopbackremotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd; | |
1715 | cm_node->tcp_cntxt.snd_wscale = loopbackremotenode->tcp_cntxt.rcv_wscale; | |
1716 | loopbackremotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale; | |
1717 | ||
1718 | create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ); | |
1719 | } | |
1720 | return cm_node; | |
1721 | } | |
1722 | ||
1723 | /* set our node side to client (active) side */ | |
1724 | cm_node->tcp_cntxt.client = 1; | |
1725 | /* init our MPA frame ptr */ | |
1726 | memcpy(&cm_node->mpa_frame, mpa_frame, mpa_frame_size); | |
1727 | cm_node->mpa_frame_size = mpa_frame_size; | |
1728 | ||
1729 | /* send a syn and goto syn sent state */ | |
1730 | cm_node->state = NES_CM_STATE_SYN_SENT; | |
1731 | ret = send_syn(cm_node, 0); | |
1732 | ||
1733 | nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X, port=0x%04x," | |
1734 | " cm_node=%p, cm_id = %p.\n", | |
1735 | cm_node->rem_addr, cm_node->rem_port, cm_node, cm_node->cm_id); | |
1736 | ||
1737 | return cm_node; | |
1738 | } | |
1739 | ||
1740 | ||
1741 | /** | |
1742 | * mini_cm_accept - accept a connection | |
1743 | * This function is never called | |
1744 | */ | |
1a855fbf RD |
1745 | static int mini_cm_accept(struct nes_cm_core *cm_core, struct ietf_mpa_frame *mpa_frame, |
1746 | struct nes_cm_node *cm_node) | |
3c2d774c GS |
1747 | { |
1748 | return 0; | |
1749 | } | |
1750 | ||
1751 | ||
1752 | /** | |
1753 | * mini_cm_reject - reject and teardown a connection | |
1754 | */ | |
1a855fbf RD |
1755 | static int mini_cm_reject(struct nes_cm_core *cm_core, |
1756 | struct ietf_mpa_frame *mpa_frame, | |
1757 | struct nes_cm_node *cm_node) | |
3c2d774c GS |
1758 | { |
1759 | int ret = 0; | |
1760 | struct sk_buff *skb; | |
1761 | u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + | |
1762 | ntohs(mpa_frame->priv_data_len); | |
1763 | ||
1764 | skb = get_free_pkt(cm_node); | |
1765 | if (!skb) { | |
1766 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); | |
1767 | return -1; | |
1768 | } | |
1769 | ||
1770 | /* send an MPA Request frame */ | |
1771 | form_cm_frame(skb, cm_node, NULL, 0, mpa_frame, mpa_frame_size, SET_ACK | SET_FIN); | |
1772 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); | |
1773 | ||
1774 | cm_node->state = NES_CM_STATE_CLOSED; | |
1775 | ret = send_fin(cm_node, NULL); | |
1776 | ||
1777 | if (ret < 0) { | |
1778 | printk(KERN_INFO PFX "failed to send MPA Reply (reject)\n"); | |
1779 | return ret; | |
1780 | } | |
1781 | ||
1782 | return ret; | |
1783 | } | |
1784 | ||
1785 | ||
1786 | /** | |
1787 | * mini_cm_close | |
1788 | */ | |
1a855fbf | 1789 | static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node) |
3c2d774c GS |
1790 | { |
1791 | int ret = 0; | |
1792 | ||
1793 | if (!cm_core || !cm_node) | |
1794 | return -EINVAL; | |
1795 | ||
1796 | switch (cm_node->state) { | |
1797 | /* if passed in node is null, create a reference key node for node search */ | |
1798 | /* check if we found an owner node for this pkt */ | |
1799 | case NES_CM_STATE_SYN_RCVD: | |
1800 | case NES_CM_STATE_SYN_SENT: | |
1801 | case NES_CM_STATE_ONE_SIDE_ESTABLISHED: | |
1802 | case NES_CM_STATE_ESTABLISHED: | |
1803 | case NES_CM_STATE_ACCEPTING: | |
1804 | case NES_CM_STATE_MPAREQ_SENT: | |
1805 | cm_node->state = NES_CM_STATE_FIN_WAIT1; | |
1806 | send_fin(cm_node, NULL); | |
1807 | break; | |
1808 | case NES_CM_STATE_CLOSE_WAIT: | |
1809 | cm_node->state = NES_CM_STATE_LAST_ACK; | |
1810 | send_fin(cm_node, NULL); | |
1811 | break; | |
1812 | case NES_CM_STATE_FIN_WAIT1: | |
1813 | case NES_CM_STATE_FIN_WAIT2: | |
1814 | case NES_CM_STATE_LAST_ACK: | |
1815 | case NES_CM_STATE_TIME_WAIT: | |
1816 | case NES_CM_STATE_CLOSING: | |
1817 | ret = -1; | |
1818 | break; | |
1819 | case NES_CM_STATE_LISTENING: | |
1820 | case NES_CM_STATE_UNKNOWN: | |
1821 | case NES_CM_STATE_INITED: | |
1822 | case NES_CM_STATE_CLOSED: | |
1823 | case NES_CM_STATE_TSA: | |
1824 | ret = rem_ref_cm_node(cm_core, cm_node); | |
1825 | break; | |
1826 | } | |
1827 | cm_node->cm_id = NULL; | |
1828 | return ret; | |
1829 | } | |
1830 | ||
1831 | ||
1832 | /** | |
1833 | * recv_pkt - recv an ETHERNET packet, and process it through CM | |
1834 | * node state machine | |
1835 | */ | |
1a855fbf RD |
1836 | static int mini_cm_recv_pkt(struct nes_cm_core *cm_core, struct nes_vnic *nesvnic, |
1837 | struct sk_buff *skb) | |
3c2d774c GS |
1838 | { |
1839 | struct nes_cm_node *cm_node = NULL; | |
1840 | struct nes_cm_listener *listener = NULL; | |
1841 | struct iphdr *iph; | |
1842 | struct tcphdr *tcph; | |
1843 | struct nes_cm_info nfo; | |
1844 | int ret = 0; | |
1845 | ||
1846 | if (!skb || skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) { | |
1847 | ret = -EINVAL; | |
1848 | goto out; | |
1849 | } | |
1850 | ||
1851 | iph = (struct iphdr *)skb->data; | |
1852 | tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr)); | |
1853 | skb_reset_network_header(skb); | |
1854 | skb_set_transport_header(skb, sizeof(*tcph)); | |
1855 | skb->len = ntohs(iph->tot_len); | |
1856 | ||
1857 | nfo.loc_addr = ntohl(iph->daddr); | |
1858 | nfo.loc_port = ntohs(tcph->dest); | |
1859 | nfo.rem_addr = ntohl(iph->saddr); | |
1860 | nfo.rem_port = ntohs(tcph->source); | |
1861 | ||
1862 | nes_debug(NES_DBG_CM, "Received packet: dest=0x%08X:0x%04X src=0x%08X:0x%04X\n", | |
1863 | iph->daddr, tcph->dest, iph->saddr, tcph->source); | |
1864 | ||
1865 | /* note: this call is going to increment cm_node ref count */ | |
1866 | cm_node = find_node(cm_core, | |
1867 | nfo.rem_port, nfo.rem_addr, | |
1868 | nfo.loc_port, nfo.loc_addr); | |
1869 | ||
1870 | if (!cm_node) { | |
1871 | listener = find_listener(cm_core, nfo.loc_addr, nfo.loc_port, | |
1872 | NES_CM_LISTENER_ACTIVE_STATE); | |
1873 | if (listener) { | |
1874 | nfo.cm_id = listener->cm_id; | |
1875 | nfo.conn_type = listener->conn_type; | |
1876 | } else { | |
1877 | nfo.cm_id = NULL; | |
1878 | nfo.conn_type = 0; | |
1879 | } | |
1880 | ||
1881 | cm_node = make_cm_node(cm_core, nesvnic, &nfo, listener); | |
1882 | if (!cm_node) { | |
1883 | nes_debug(NES_DBG_CM, "Unable to allocate node\n"); | |
1884 | if (listener) { | |
1885 | nes_debug(NES_DBG_CM, "unable to allocate node and decrementing listener refcount\n"); | |
1886 | atomic_dec(&listener->ref_count); | |
1887 | } | |
1888 | ret = -1; | |
1889 | goto out; | |
1890 | } | |
1891 | if (!listener) { | |
1892 | nes_debug(NES_DBG_CM, "Packet found for unknown port %x refcnt=%d\n", | |
1893 | nfo.loc_port, atomic_read(&cm_node->ref_count)); | |
1894 | if (!tcph->rst) { | |
1895 | nes_debug(NES_DBG_CM, "Packet found for unknown port=%d" | |
1896 | " rem_port=%d refcnt=%d\n", | |
1897 | nfo.loc_port, nfo.rem_port, atomic_read(&cm_node->ref_count)); | |
1898 | ||
1899 | cm_node->tcp_cntxt.rcv_nxt = ntohl(tcph->seq); | |
1900 | cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); | |
1901 | send_reset(cm_node); | |
1902 | } | |
1903 | rem_ref_cm_node(cm_core, cm_node); | |
1904 | ret = -1; | |
1905 | goto out; | |
1906 | } | |
1907 | add_ref_cm_node(cm_node); | |
1908 | cm_node->state = NES_CM_STATE_LISTENING; | |
1909 | } | |
1910 | ||
1911 | nes_debug(NES_DBG_CM, "Processing Packet for node %p, data = (%p):\n", | |
1912 | cm_node, skb->data); | |
1913 | process_packet(cm_node, skb, cm_core); | |
1914 | ||
1915 | rem_ref_cm_node(cm_core, cm_node); | |
1916 | out: | |
1917 | if (skb) | |
1918 | dev_kfree_skb_any(skb); | |
1919 | return ret; | |
1920 | } | |
1921 | ||
1922 | ||
1923 | /** | |
1924 | * nes_cm_alloc_core - allocate a top level instance of a cm core | |
1925 | */ | |
1a855fbf | 1926 | static struct nes_cm_core *nes_cm_alloc_core(void) |
3c2d774c GS |
1927 | { |
1928 | int i; | |
1929 | ||
1930 | struct nes_cm_core *cm_core; | |
1931 | struct sk_buff *skb = NULL; | |
1932 | ||
1933 | /* setup the CM core */ | |
1934 | /* alloc top level core control structure */ | |
1935 | cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL); | |
1936 | if (!cm_core) | |
1937 | return NULL; | |
1938 | ||
1939 | INIT_LIST_HEAD(&cm_core->connected_nodes); | |
1940 | init_timer(&cm_core->tcp_timer); | |
1941 | cm_core->tcp_timer.function = nes_cm_timer_tick; | |
1942 | ||
1943 | cm_core->mtu = NES_CM_DEFAULT_MTU; | |
1944 | cm_core->state = NES_CM_STATE_INITED; | |
1945 | cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS; | |
1946 | ||
1947 | atomic_set(&cm_core->session_id, 0); | |
1948 | atomic_set(&cm_core->events_posted, 0); | |
1949 | ||
1950 | /* init the packet lists */ | |
1951 | skb_queue_head_init(&cm_core->tx_free_list); | |
1952 | ||
1953 | for (i = 0; i < NES_CM_DEFAULT_FRAME_CNT; i++) { | |
1954 | skb = dev_alloc_skb(cm_core->mtu); | |
1955 | if (!skb) { | |
1956 | kfree(cm_core); | |
1957 | return NULL; | |
1958 | } | |
1959 | /* add 'raw' skb to free frame list */ | |
1960 | skb_queue_head(&cm_core->tx_free_list, skb); | |
1961 | } | |
1962 | ||
1963 | cm_core->api = &nes_cm_api; | |
1964 | ||
1965 | spin_lock_init(&cm_core->ht_lock); | |
1966 | spin_lock_init(&cm_core->listen_list_lock); | |
1967 | ||
1968 | INIT_LIST_HEAD(&cm_core->listen_list.list); | |
1969 | ||
1970 | nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core); | |
1971 | ||
1972 | nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n"); | |
1973 | cm_core->event_wq = create_singlethread_workqueue("nesewq"); | |
1974 | cm_core->post_event = nes_cm_post_event; | |
1975 | nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n"); | |
1976 | cm_core->disconn_wq = create_singlethread_workqueue("nesdwq"); | |
1977 | ||
1978 | print_core(cm_core); | |
1979 | return cm_core; | |
1980 | } | |
1981 | ||
1982 | ||
1983 | /** | |
1984 | * mini_cm_dealloc_core - deallocate a top level instance of a cm core | |
1985 | */ | |
1a855fbf | 1986 | static int mini_cm_dealloc_core(struct nes_cm_core *cm_core) |
3c2d774c GS |
1987 | { |
1988 | nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core); | |
1989 | ||
1990 | if (!cm_core) | |
1991 | return -EINVAL; | |
1992 | ||
1993 | barrier(); | |
1994 | ||
1995 | if (timer_pending(&cm_core->tcp_timer)) { | |
1996 | del_timer(&cm_core->tcp_timer); | |
1997 | } | |
1998 | ||
1999 | destroy_workqueue(cm_core->event_wq); | |
2000 | destroy_workqueue(cm_core->disconn_wq); | |
2001 | nes_debug(NES_DBG_CM, "\n"); | |
2002 | kfree(cm_core); | |
2003 | ||
2004 | return 0; | |
2005 | } | |
2006 | ||
2007 | ||
2008 | /** | |
2009 | * mini_cm_get | |
2010 | */ | |
1a855fbf | 2011 | static int mini_cm_get(struct nes_cm_core *cm_core) |
3c2d774c GS |
2012 | { |
2013 | return cm_core->state; | |
2014 | } | |
2015 | ||
2016 | ||
2017 | /** | |
2018 | * mini_cm_set | |
2019 | */ | |
1a855fbf | 2020 | static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value) |
3c2d774c GS |
2021 | { |
2022 | int ret = 0; | |
2023 | ||
2024 | switch (type) { | |
2025 | case NES_CM_SET_PKT_SIZE: | |
2026 | cm_core->mtu = value; | |
2027 | break; | |
2028 | case NES_CM_SET_FREE_PKT_Q_SIZE: | |
2029 | cm_core->free_tx_pkt_max = value; | |
2030 | break; | |
2031 | default: | |
2032 | /* unknown set option */ | |
2033 | ret = -EINVAL; | |
2034 | } | |
2035 | ||
2036 | return ret; | |
2037 | } | |
2038 | ||
2039 | ||
2040 | /** | |
2041 | * nes_cm_init_tsa_conn setup HW; MPA frames must be | |
2042 | * successfully exchanged when this is called | |
2043 | */ | |
2044 | static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node) | |
2045 | { | |
2046 | int ret = 0; | |
2047 | ||
2048 | if (!nesqp) | |
2049 | return -EINVAL; | |
2050 | ||
2051 | nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 | | |
2052 | NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG | | |
2053 | NES_QPCONTEXT_MISC_DROS); | |
2054 | ||
2055 | if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale) | |
2056 | nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE); | |
2057 | ||
2058 | nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT); | |
2059 | ||
2060 | nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16); | |
2061 | ||
2062 | nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32( | |
2063 | (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT); | |
2064 | ||
2065 | nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32( | |
2066 | (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) & | |
2067 | NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK); | |
2068 | ||
2069 | nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32( | |
2070 | (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) & | |
2071 | NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK); | |
2072 | ||
2073 | nesqp->nesqp_context->keepalive = cpu_to_le32(0x80); | |
2074 | nesqp->nesqp_context->ts_recent = 0; | |
2075 | nesqp->nesqp_context->ts_age = 0; | |
2076 | nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2077 | nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd); | |
2078 | nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); | |
2079 | nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd << | |
2080 | cm_node->tcp_cntxt.rcv_wscale); | |
2081 | nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2082 | nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2083 | nesqp->nesqp_context->srtt = 0; | |
2084 | nesqp->nesqp_context->rttvar = cpu_to_le32(0x6); | |
2085 | nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000); | |
2086 | nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss); | |
2087 | nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); | |
2088 | nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); | |
2089 | nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd); | |
2090 | ||
2091 | nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X," | |
2092 | " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n", | |
2093 | nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt), | |
2094 | le32_to_cpu(nesqp->nesqp_context->snd_nxt), | |
2095 | cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale), | |
2096 | le32_to_cpu(nesqp->nesqp_context->rcv_wnd), | |
2097 | le32_to_cpu(nesqp->nesqp_context->misc)); | |
2098 | nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd)); | |
2099 | nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd)); | |
2100 | nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd)); | |
2101 | ||
2102 | nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n"); | |
2103 | cm_node->state = NES_CM_STATE_TSA; | |
2104 | ||
2105 | return ret; | |
2106 | } | |
2107 | ||
2108 | ||
2109 | /** | |
2110 | * nes_cm_disconn | |
2111 | */ | |
2112 | int nes_cm_disconn(struct nes_qp *nesqp) | |
2113 | { | |
2114 | unsigned long flags; | |
2115 | ||
2116 | spin_lock_irqsave(&nesqp->lock, flags); | |
2117 | if (nesqp->disconn_pending == 0) { | |
2118 | nesqp->disconn_pending++; | |
2119 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2120 | /* nes_add_ref(&nesqp->ibqp); */ | |
2121 | /* init our disconnect work element, to */ | |
2122 | INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker); | |
2123 | ||
2124 | queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work); | |
2125 | } else { | |
2126 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2127 | nes_rem_ref(&nesqp->ibqp); | |
2128 | } | |
2129 | ||
2130 | return 0; | |
2131 | } | |
2132 | ||
2133 | ||
2134 | /** | |
2135 | * nes_disconnect_worker | |
2136 | */ | |
1a855fbf | 2137 | static void nes_disconnect_worker(struct work_struct *work) |
3c2d774c GS |
2138 | { |
2139 | struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work); | |
2140 | ||
2141 | nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n", | |
2142 | nesqp->last_aeq, nesqp->hwqp.qp_id); | |
2143 | nes_cm_disconn_true(nesqp); | |
2144 | } | |
2145 | ||
2146 | ||
2147 | /** | |
2148 | * nes_cm_disconn_true | |
2149 | */ | |
1a855fbf | 2150 | static int nes_cm_disconn_true(struct nes_qp *nesqp) |
3c2d774c GS |
2151 | { |
2152 | unsigned long flags; | |
2153 | int ret = 0; | |
2154 | struct iw_cm_id *cm_id; | |
2155 | struct iw_cm_event cm_event; | |
2156 | struct nes_vnic *nesvnic; | |
2157 | u16 last_ae; | |
2158 | u8 original_hw_tcp_state; | |
2159 | u8 original_ibqp_state; | |
2160 | u8 issued_disconnect_reset = 0; | |
2161 | ||
2162 | if (!nesqp) { | |
2163 | nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n"); | |
2164 | return -1; | |
2165 | } | |
2166 | ||
2167 | spin_lock_irqsave(&nesqp->lock, flags); | |
2168 | cm_id = nesqp->cm_id; | |
2169 | /* make sure we havent already closed this connection */ | |
2170 | if (!cm_id) { | |
2171 | nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n", | |
2172 | nesqp->hwqp.qp_id); | |
2173 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2174 | nes_rem_ref(&nesqp->ibqp); | |
2175 | return -1; | |
2176 | } | |
2177 | ||
2178 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2179 | nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id); | |
2180 | ||
2181 | original_hw_tcp_state = nesqp->hw_tcp_state; | |
2182 | original_ibqp_state = nesqp->ibqp_state; | |
2183 | last_ae = nesqp->last_aeq; | |
2184 | ||
2185 | ||
2186 | nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state); | |
2187 | ||
2188 | if ((nesqp->cm_id) && (cm_id->event_handler)) { | |
2189 | if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) || | |
2190 | ((original_ibqp_state == IB_QPS_RTS) && | |
2191 | (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) { | |
2192 | atomic_inc(&cm_disconnects); | |
2193 | cm_event.event = IW_CM_EVENT_DISCONNECT; | |
2194 | if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) { | |
2195 | issued_disconnect_reset = 1; | |
2196 | cm_event.status = IW_CM_EVENT_STATUS_RESET; | |
2197 | nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event (status reset) for " | |
2198 | " QP%u, cm_id = %p. \n", | |
2199 | nesqp->hwqp.qp_id, cm_id); | |
2200 | } else { | |
2201 | cm_event.status = IW_CM_EVENT_STATUS_OK; | |
2202 | } | |
2203 | ||
2204 | cm_event.local_addr = cm_id->local_addr; | |
2205 | cm_event.remote_addr = cm_id->remote_addr; | |
2206 | cm_event.private_data = NULL; | |
2207 | cm_event.private_data_len = 0; | |
2208 | ||
2209 | nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event for " | |
2210 | " QP%u, SQ Head = %u, SQ Tail = %u. cm_id = %p, refcount = %u.\n", | |
2211 | nesqp->hwqp.qp_id, | |
2212 | nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail, cm_id, | |
2213 | atomic_read(&nesqp->refcount)); | |
2214 | ||
2215 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2216 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2217 | if (ret) | |
2218 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
2219 | spin_lock_irqsave(&nesqp->lock, flags); | |
2220 | } | |
2221 | ||
2222 | nesqp->disconn_pending = 0; | |
2223 | /* There might have been another AE while the lock was released */ | |
2224 | original_hw_tcp_state = nesqp->hw_tcp_state; | |
2225 | original_ibqp_state = nesqp->ibqp_state; | |
2226 | last_ae = nesqp->last_aeq; | |
2227 | ||
2228 | if ((issued_disconnect_reset == 0) && (nesqp->cm_id) && | |
2229 | ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) || | |
2230 | (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) || | |
2231 | (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) || | |
2232 | (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) { | |
2233 | atomic_inc(&cm_closes); | |
2234 | nesqp->cm_id = NULL; | |
2235 | nesqp->in_disconnect = 0; | |
2236 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2237 | nes_disconnect(nesqp, 1); | |
2238 | ||
2239 | cm_id->provider_data = nesqp; | |
2240 | /* Send up the close complete event */ | |
2241 | cm_event.event = IW_CM_EVENT_CLOSE; | |
2242 | cm_event.status = IW_CM_EVENT_STATUS_OK; | |
2243 | cm_event.provider_data = cm_id->provider_data; | |
2244 | cm_event.local_addr = cm_id->local_addr; | |
2245 | cm_event.remote_addr = cm_id->remote_addr; | |
2246 | cm_event.private_data = NULL; | |
2247 | cm_event.private_data_len = 0; | |
2248 | ||
2249 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2250 | if (ret) { | |
2251 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
2252 | } | |
2253 | ||
2254 | cm_id->rem_ref(cm_id); | |
2255 | ||
2256 | spin_lock_irqsave(&nesqp->lock, flags); | |
2257 | if (nesqp->flush_issued == 0) { | |
2258 | nesqp->flush_issued = 1; | |
2259 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2260 | flush_wqes(nesvnic->nesdev, nesqp, NES_CQP_FLUSH_RQ, 1); | |
2261 | } else { | |
2262 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2263 | } | |
2264 | ||
2265 | /* This reference is from either ModifyQP or the AE processing, | |
2266 | there is still a race here with modifyqp */ | |
2267 | nes_rem_ref(&nesqp->ibqp); | |
2268 | ||
2269 | } else { | |
2270 | cm_id = nesqp->cm_id; | |
2271 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2272 | /* check to see if the inbound reset beat the outbound reset */ | |
2273 | if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) { | |
2274 | nes_debug(NES_DBG_CM, "QP%u: Decing refcount due to inbound reset" | |
2275 | " beating the outbound reset.\n", | |
2276 | nesqp->hwqp.qp_id); | |
2277 | nes_rem_ref(&nesqp->ibqp); | |
2278 | } | |
2279 | } | |
2280 | } else { | |
2281 | nesqp->disconn_pending = 0; | |
2282 | spin_unlock_irqrestore(&nesqp->lock, flags); | |
2283 | } | |
2284 | nes_rem_ref(&nesqp->ibqp); | |
2285 | ||
2286 | return 0; | |
2287 | } | |
2288 | ||
2289 | ||
2290 | /** | |
2291 | * nes_disconnect | |
2292 | */ | |
1a855fbf | 2293 | static int nes_disconnect(struct nes_qp *nesqp, int abrupt) |
3c2d774c GS |
2294 | { |
2295 | int ret = 0; | |
2296 | struct nes_vnic *nesvnic; | |
2297 | struct nes_device *nesdev; | |
2298 | ||
2299 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2300 | if (!nesvnic) | |
2301 | return -EINVAL; | |
2302 | ||
2303 | nesdev = nesvnic->nesdev; | |
2304 | ||
2305 | nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n", | |
2306 | atomic_read(&nesvnic->netdev->refcnt)); | |
2307 | ||
2308 | if (nesqp->active_conn) { | |
2309 | ||
2310 | /* indicate this connection is NOT active */ | |
2311 | nesqp->active_conn = 0; | |
2312 | } else { | |
2313 | /* Need to free the Last Streaming Mode Message */ | |
2314 | if (nesqp->ietf_frame) { | |
2315 | pci_free_consistent(nesdev->pcidev, | |
2316 | nesqp->private_data_len+sizeof(struct ietf_mpa_frame), | |
2317 | nesqp->ietf_frame, nesqp->ietf_frame_pbase); | |
2318 | } | |
2319 | } | |
2320 | ||
2321 | /* close the CM node down if it is still active */ | |
2322 | if (nesqp->cm_node) { | |
2323 | nes_debug(NES_DBG_CM, "Call close API\n"); | |
2324 | ||
2325 | g_cm_core->api->close(g_cm_core, nesqp->cm_node); | |
2326 | nesqp->cm_node = NULL; | |
2327 | } | |
2328 | ||
2329 | return ret; | |
2330 | } | |
2331 | ||
2332 | ||
2333 | /** | |
2334 | * nes_accept | |
2335 | */ | |
2336 | int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
2337 | { | |
2338 | u64 u64temp; | |
2339 | struct ib_qp *ibqp; | |
2340 | struct nes_qp *nesqp; | |
2341 | struct nes_vnic *nesvnic; | |
2342 | struct nes_device *nesdev; | |
2343 | struct nes_cm_node *cm_node; | |
2344 | struct nes_adapter *adapter; | |
2345 | struct ib_qp_attr attr; | |
2346 | struct iw_cm_event cm_event; | |
2347 | struct nes_hw_qp_wqe *wqe; | |
2348 | struct nes_v4_quad nes_quad; | |
30da7cff | 2349 | u32 crc_value; |
3c2d774c GS |
2350 | int ret; |
2351 | ||
2352 | ibqp = nes_get_qp(cm_id->device, conn_param->qpn); | |
2353 | if (!ibqp) | |
2354 | return -EINVAL; | |
2355 | ||
2356 | /* get all our handles */ | |
2357 | nesqp = to_nesqp(ibqp); | |
2358 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2359 | nesdev = nesvnic->nesdev; | |
2360 | adapter = nesdev->nesadapter; | |
2361 | ||
2362 | nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n", | |
2363 | nesvnic, nesvnic->netdev, nesvnic->netdev->name); | |
2364 | ||
2365 | /* since this is from a listen, we were able to put node handle into cm_id */ | |
2366 | cm_node = (struct nes_cm_node *)cm_id->provider_data; | |
2367 | ||
2368 | /* associate the node with the QP */ | |
2369 | nesqp->cm_node = (void *)cm_node; | |
2370 | ||
2371 | nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu\n", | |
2372 | nesqp->hwqp.qp_id, cm_node, jiffies); | |
2373 | atomic_inc(&cm_accepts); | |
2374 | ||
2375 | nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n", | |
2376 | atomic_read(&nesvnic->netdev->refcnt)); | |
2377 | ||
2378 | /* allocate the ietf frame and space for private data */ | |
2379 | nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev, | |
2380 | sizeof(struct ietf_mpa_frame) + conn_param->private_data_len, | |
2381 | &nesqp->ietf_frame_pbase); | |
2382 | ||
2383 | if (!nesqp->ietf_frame) { | |
2384 | nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n"); | |
2385 | return -ENOMEM; | |
2386 | } | |
2387 | ||
2388 | ||
2389 | /* setup the MPA frame */ | |
2390 | nesqp->private_data_len = conn_param->private_data_len; | |
2391 | memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); | |
2392 | ||
2393 | memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data, | |
2394 | conn_param->private_data_len); | |
2395 | ||
2396 | nesqp->ietf_frame->priv_data_len = cpu_to_be16(conn_param->private_data_len); | |
2397 | nesqp->ietf_frame->rev = mpa_version; | |
2398 | nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC; | |
2399 | ||
2400 | /* setup our first outgoing iWarp send WQE (the IETF frame response) */ | |
2401 | wqe = &nesqp->hwqp.sq_vbase[0]; | |
2402 | ||
2403 | if (cm_id->remote_addr.sin_addr.s_addr != cm_id->local_addr.sin_addr.s_addr) { | |
2404 | u64temp = (unsigned long)nesqp; | |
2405 | u64temp |= NES_SW_CONTEXT_ALIGN>>1; | |
2406 | set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, | |
2407 | u64temp); | |
2408 | wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = | |
2409 | cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING | NES_IWARP_SQ_WQE_WRPDU); | |
2410 | wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = | |
2411 | cpu_to_le32(conn_param->private_data_len + sizeof(struct ietf_mpa_frame)); | |
2412 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = | |
2413 | cpu_to_le32((u32)nesqp->ietf_frame_pbase); | |
2414 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = | |
2415 | cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32)); | |
2416 | wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = | |
2417 | cpu_to_le32(conn_param->private_data_len + sizeof(struct ietf_mpa_frame)); | |
2418 | wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0; | |
2419 | ||
2420 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32( | |
2421 | NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | NES_QPCONTEXT_ORDIRD_WRPDU); | |
2422 | } else { | |
2423 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | | |
2424 | NES_QPCONTEXT_ORDIRD_WRPDU | NES_QPCONTEXT_ORDIRD_ALSMM)); | |
2425 | } | |
2426 | nesqp->skip_lsmm = 1; | |
2427 | ||
2428 | ||
2429 | /* Cache the cm_id in the qp */ | |
2430 | nesqp->cm_id = cm_id; | |
2431 | cm_node->cm_id = cm_id; | |
2432 | ||
2433 | /* nesqp->cm_node = (void *)cm_id->provider_data; */ | |
2434 | cm_id->provider_data = nesqp; | |
2435 | nesqp->active_conn = 0; | |
2436 | ||
2437 | nes_cm_init_tsa_conn(nesqp, cm_node); | |
2438 | ||
2439 | nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(cm_id->local_addr.sin_port)); | |
2440 | nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(cm_id->remote_addr.sin_port)); | |
2441 | nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr)); | |
2442 | ||
2443 | nesqp->nesqp_context->misc2 |= cpu_to_le32( | |
2444 | (u32)PCI_FUNC(nesdev->pcidev->devfn) << NES_QPCONTEXT_MISC2_SRC_IP_SHIFT); | |
2445 | ||
2446 | nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32( | |
2447 | nes_arp_table(nesdev, le32_to_cpu(nesqp->nesqp_context->ip0), NULL, | |
2448 | NES_ARP_RESOLVE) << 16); | |
2449 | ||
2450 | nesqp->nesqp_context->ts_val_delta = cpu_to_le32( | |
2451 | jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW)); | |
2452 | ||
2453 | nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id); | |
2454 | ||
2455 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32( | |
2456 | ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT)); | |
2457 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord); | |
2458 | ||
2459 | memset(&nes_quad, 0, sizeof(nes_quad)); | |
2460 | nes_quad.DstIpAdrIndex = cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24); | |
2461 | nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr; | |
2462 | nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port; | |
2463 | nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port; | |
2464 | ||
2465 | /* Produce hash key */ | |
30da7cff FL |
2466 | crc_value = get_crc_value(&nes_quad); |
2467 | nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff); | |
3c2d774c GS |
2468 | nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n", |
2469 | nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask); | |
2470 | ||
2471 | nesqp->hte_index &= adapter->hte_index_mask; | |
2472 | nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index); | |
2473 | ||
2474 | cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node); | |
2475 | ||
2476 | nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = 0x%08X:0x%04X," | |
2477 | " rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + private data length=%zu.\n", | |
2478 | nesqp->hwqp.qp_id, | |
2479 | ntohl(cm_id->remote_addr.sin_addr.s_addr), | |
2480 | ntohs(cm_id->remote_addr.sin_port), | |
2481 | ntohl(cm_id->local_addr.sin_addr.s_addr), | |
2482 | ntohs(cm_id->local_addr.sin_port), | |
2483 | le32_to_cpu(nesqp->nesqp_context->rcv_nxt), | |
2484 | le32_to_cpu(nesqp->nesqp_context->snd_nxt), | |
2485 | conn_param->private_data_len+sizeof(struct ietf_mpa_frame)); | |
2486 | ||
2487 | attr.qp_state = IB_QPS_RTS; | |
2488 | nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL); | |
2489 | ||
2490 | /* notify OF layer that accept event was successfull */ | |
2491 | cm_id->add_ref(cm_id); | |
2492 | ||
2493 | cm_event.event = IW_CM_EVENT_ESTABLISHED; | |
2494 | cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED; | |
2495 | cm_event.provider_data = (void *)nesqp; | |
2496 | cm_event.local_addr = cm_id->local_addr; | |
2497 | cm_event.remote_addr = cm_id->remote_addr; | |
2498 | cm_event.private_data = NULL; | |
2499 | cm_event.private_data_len = 0; | |
2500 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2501 | if (cm_node->loopbackpartner) { | |
2502 | cm_node->loopbackpartner->mpa_frame_size = nesqp->private_data_len; | |
2503 | /* copy entire MPA frame to our cm_node's frame */ | |
2504 | memcpy(cm_node->loopbackpartner->mpa_frame_buf, nesqp->ietf_frame->priv_data, | |
2505 | nesqp->private_data_len); | |
2506 | create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED); | |
2507 | } | |
2508 | if (ret) | |
2509 | printk("%s[%u] OFA CM event_handler returned, ret=%d\n", | |
2510 | __FUNCTION__, __LINE__, ret); | |
2511 | ||
2512 | return 0; | |
2513 | } | |
2514 | ||
2515 | ||
2516 | /** | |
2517 | * nes_reject | |
2518 | */ | |
2519 | int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) | |
2520 | { | |
2521 | struct nes_cm_node *cm_node; | |
2522 | struct nes_cm_core *cm_core; | |
2523 | ||
2524 | atomic_inc(&cm_rejects); | |
2525 | cm_node = (struct nes_cm_node *) cm_id->provider_data; | |
2526 | cm_core = cm_node->cm_core; | |
2527 | cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len; | |
2528 | ||
2529 | strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP); | |
2530 | memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len); | |
2531 | ||
2532 | cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len); | |
2533 | cm_node->mpa_frame.rev = mpa_version; | |
2534 | cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT; | |
2535 | ||
2536 | cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node); | |
2537 | ||
2538 | return 0; | |
2539 | } | |
2540 | ||
2541 | ||
2542 | /** | |
2543 | * nes_connect | |
2544 | * setup and launch cm connect node | |
2545 | */ | |
2546 | int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
2547 | { | |
2548 | struct ib_qp *ibqp; | |
2549 | struct nes_qp *nesqp; | |
2550 | struct nes_vnic *nesvnic; | |
2551 | struct nes_device *nesdev; | |
2552 | struct nes_cm_node *cm_node; | |
2553 | struct nes_cm_info cm_info; | |
2554 | ||
2555 | ibqp = nes_get_qp(cm_id->device, conn_param->qpn); | |
2556 | if (!ibqp) | |
2557 | return -EINVAL; | |
2558 | nesqp = to_nesqp(ibqp); | |
2559 | if (!nesqp) | |
2560 | return -EINVAL; | |
2561 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2562 | if (!nesvnic) | |
2563 | return -EINVAL; | |
2564 | nesdev = nesvnic->nesdev; | |
2565 | if (!nesdev) | |
2566 | return -EINVAL; | |
2567 | ||
2568 | atomic_inc(&cm_connects); | |
2569 | ||
2570 | nesqp->ietf_frame = kzalloc(sizeof(struct ietf_mpa_frame) + | |
2571 | conn_param->private_data_len, GFP_KERNEL); | |
2572 | if (!nesqp->ietf_frame) | |
2573 | return -ENOMEM; | |
2574 | ||
2575 | /* set qp as having an active connection */ | |
2576 | nesqp->active_conn = 1; | |
2577 | ||
2578 | nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", | |
2579 | nesqp->hwqp.qp_id, | |
2580 | ntohl(cm_id->remote_addr.sin_addr.s_addr), | |
2581 | ntohs(cm_id->remote_addr.sin_port), | |
2582 | ntohl(cm_id->local_addr.sin_addr.s_addr), | |
2583 | ntohs(cm_id->local_addr.sin_port)); | |
2584 | ||
2585 | /* cache the cm_id in the qp */ | |
2586 | nesqp->cm_id = cm_id; | |
2587 | ||
2588 | cm_id->provider_data = nesqp; | |
2589 | ||
2590 | /* copy the private data */ | |
2591 | if (conn_param->private_data_len) { | |
2592 | memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data, | |
2593 | conn_param->private_data_len); | |
2594 | } | |
2595 | ||
2596 | nesqp->private_data_len = conn_param->private_data_len; | |
2597 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord); | |
2598 | nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord); | |
2599 | nes_debug(NES_DBG_CM, "mpa private data len =%u\n", conn_param->private_data_len); | |
2600 | ||
2601 | strcpy(&nesqp->ietf_frame->key[0], IEFT_MPA_KEY_REQ); | |
2602 | nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC; | |
2603 | nesqp->ietf_frame->rev = IETF_MPA_VERSION; | |
2604 | nesqp->ietf_frame->priv_data_len = htons(conn_param->private_data_len); | |
2605 | ||
2606 | if (cm_id->local_addr.sin_addr.s_addr != cm_id->remote_addr.sin_addr.s_addr) | |
2607 | nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port), | |
2608 | PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD); | |
2609 | ||
2610 | /* set up the connection params for the node */ | |
2611 | cm_info.loc_addr = (cm_id->local_addr.sin_addr.s_addr); | |
2612 | cm_info.loc_port = (cm_id->local_addr.sin_port); | |
2613 | cm_info.rem_addr = (cm_id->remote_addr.sin_addr.s_addr); | |
2614 | cm_info.rem_port = (cm_id->remote_addr.sin_port); | |
2615 | cm_info.cm_id = cm_id; | |
2616 | cm_info.conn_type = NES_CM_IWARP_CONN_TYPE; | |
2617 | ||
2618 | cm_id->add_ref(cm_id); | |
2619 | nes_add_ref(&nesqp->ibqp); | |
2620 | ||
2621 | /* create a connect CM node connection */ | |
2622 | cm_node = g_cm_core->api->connect(g_cm_core, nesvnic, nesqp->ietf_frame, &cm_info); | |
2623 | if (!cm_node) { | |
2624 | if (cm_id->local_addr.sin_addr.s_addr != cm_id->remote_addr.sin_addr.s_addr) | |
2625 | nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port), | |
2626 | PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL); | |
2627 | nes_rem_ref(&nesqp->ibqp); | |
2628 | kfree(nesqp->ietf_frame); | |
2629 | nesqp->ietf_frame = NULL; | |
2630 | cm_id->rem_ref(cm_id); | |
2631 | return -ENOMEM; | |
2632 | } | |
2633 | ||
2634 | cm_node->apbvt_set = 1; | |
2635 | nesqp->cm_node = cm_node; | |
2636 | ||
2637 | return 0; | |
2638 | } | |
2639 | ||
2640 | ||
2641 | /** | |
2642 | * nes_create_listen | |
2643 | */ | |
2644 | int nes_create_listen(struct iw_cm_id *cm_id, int backlog) | |
2645 | { | |
2646 | struct nes_vnic *nesvnic; | |
2647 | struct nes_cm_listener *cm_node; | |
2648 | struct nes_cm_info cm_info; | |
2649 | struct nes_adapter *adapter; | |
2650 | int err; | |
2651 | ||
2652 | ||
2653 | nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n", | |
2654 | cm_id, ntohs(cm_id->local_addr.sin_port)); | |
2655 | ||
2656 | nesvnic = to_nesvnic(cm_id->device); | |
2657 | if (!nesvnic) | |
2658 | return -EINVAL; | |
2659 | adapter = nesvnic->nesdev->nesadapter; | |
2660 | nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n", | |
2661 | nesvnic, nesvnic->netdev, nesvnic->netdev->name); | |
2662 | ||
2663 | nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n", | |
2664 | nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr); | |
2665 | ||
2666 | /* setup listen params in our api call struct */ | |
2667 | cm_info.loc_addr = nesvnic->local_ipaddr; | |
2668 | cm_info.loc_port = cm_id->local_addr.sin_port; | |
2669 | cm_info.backlog = backlog; | |
2670 | cm_info.cm_id = cm_id; | |
2671 | ||
2672 | cm_info.conn_type = NES_CM_IWARP_CONN_TYPE; | |
2673 | ||
2674 | ||
2675 | cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info); | |
2676 | if (!cm_node) { | |
2677 | printk("%s[%u] Error returned from listen API call\n", | |
2678 | __FUNCTION__, __LINE__); | |
2679 | return -ENOMEM; | |
2680 | } | |
2681 | ||
2682 | cm_id->provider_data = cm_node; | |
2683 | ||
2684 | if (!cm_node->reused_node) { | |
2685 | err = nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port), | |
2686 | PCI_FUNC(nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD); | |
2687 | if (err) { | |
2688 | printk("nes_manage_apbvt call returned %d.\n", err); | |
2689 | g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node); | |
2690 | return err; | |
2691 | } | |
2692 | cm_listens_created++; | |
2693 | } | |
2694 | ||
2695 | cm_id->add_ref(cm_id); | |
2696 | cm_id->provider_data = (void *)cm_node; | |
2697 | ||
2698 | ||
2699 | return 0; | |
2700 | } | |
2701 | ||
2702 | ||
2703 | /** | |
2704 | * nes_destroy_listen | |
2705 | */ | |
2706 | int nes_destroy_listen(struct iw_cm_id *cm_id) | |
2707 | { | |
2708 | if (cm_id->provider_data) | |
2709 | g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data); | |
2710 | else | |
2711 | nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n"); | |
2712 | ||
2713 | cm_id->rem_ref(cm_id); | |
2714 | ||
2715 | return 0; | |
2716 | } | |
2717 | ||
2718 | ||
2719 | /** | |
2720 | * nes_cm_recv | |
2721 | */ | |
2722 | int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice) | |
2723 | { | |
2724 | cm_packets_received++; | |
2725 | if ((g_cm_core) && (g_cm_core->api)) { | |
2726 | g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb); | |
2727 | } else { | |
2728 | nes_debug(NES_DBG_CM, "Unable to process packet for CM," | |
2729 | " cm is not setup properly.\n"); | |
2730 | } | |
2731 | ||
2732 | return 0; | |
2733 | } | |
2734 | ||
2735 | ||
2736 | /** | |
2737 | * nes_cm_start | |
2738 | * Start and init a cm core module | |
2739 | */ | |
2740 | int nes_cm_start(void) | |
2741 | { | |
2742 | nes_debug(NES_DBG_CM, "\n"); | |
2743 | /* create the primary CM core, pass this handle to subsequent core inits */ | |
2744 | g_cm_core = nes_cm_alloc_core(); | |
2745 | if (g_cm_core) { | |
2746 | return 0; | |
2747 | } else { | |
2748 | return -ENOMEM; | |
2749 | } | |
2750 | } | |
2751 | ||
2752 | ||
2753 | /** | |
2754 | * nes_cm_stop | |
2755 | * stop and dealloc all cm core instances | |
2756 | */ | |
2757 | int nes_cm_stop(void) | |
2758 | { | |
2759 | g_cm_core->api->destroy_cm_core(g_cm_core); | |
2760 | return 0; | |
2761 | } | |
2762 | ||
2763 | ||
2764 | /** | |
2765 | * cm_event_connected | |
2766 | * handle a connected event, setup QPs and HW | |
2767 | */ | |
1a855fbf | 2768 | static void cm_event_connected(struct nes_cm_event *event) |
3c2d774c GS |
2769 | { |
2770 | u64 u64temp; | |
2771 | struct nes_qp *nesqp; | |
2772 | struct nes_vnic *nesvnic; | |
2773 | struct nes_device *nesdev; | |
2774 | struct nes_cm_node *cm_node; | |
2775 | struct nes_adapter *nesadapter; | |
2776 | struct ib_qp_attr attr; | |
2777 | struct iw_cm_id *cm_id; | |
2778 | struct iw_cm_event cm_event; | |
2779 | struct nes_hw_qp_wqe *wqe; | |
2780 | struct nes_v4_quad nes_quad; | |
30da7cff | 2781 | u32 crc_value; |
3c2d774c GS |
2782 | int ret; |
2783 | ||
2784 | /* get all our handles */ | |
2785 | cm_node = event->cm_node; | |
2786 | cm_id = cm_node->cm_id; | |
2787 | nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id); | |
2788 | nesqp = (struct nes_qp *)cm_id->provider_data; | |
2789 | nesvnic = to_nesvnic(nesqp->ibqp.device); | |
2790 | nesdev = nesvnic->nesdev; | |
2791 | nesadapter = nesdev->nesadapter; | |
2792 | ||
2793 | if (nesqp->destroyed) { | |
2794 | return; | |
2795 | } | |
2796 | atomic_inc(&cm_connecteds); | |
2797 | nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on" | |
2798 | " local port 0x%04X. jiffies = %lu.\n", | |
2799 | nesqp->hwqp.qp_id, | |
2800 | ntohl(cm_id->remote_addr.sin_addr.s_addr), | |
2801 | ntohs(cm_id->remote_addr.sin_port), | |
2802 | ntohs(cm_id->local_addr.sin_port), | |
2803 | jiffies); | |
2804 | ||
2805 | nes_cm_init_tsa_conn(nesqp, cm_node); | |
2806 | ||
2807 | /* set the QP tsa context */ | |
2808 | nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(cm_id->local_addr.sin_port)); | |
2809 | nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(cm_id->remote_addr.sin_port)); | |
2810 | nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr)); | |
2811 | ||
2812 | nesqp->nesqp_context->misc2 |= cpu_to_le32( | |
2813 | (u32)PCI_FUNC(nesdev->pcidev->devfn) << NES_QPCONTEXT_MISC2_SRC_IP_SHIFT); | |
2814 | nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32( | |
2815 | nes_arp_table(nesdev, le32_to_cpu(nesqp->nesqp_context->ip0), | |
2816 | NULL, NES_ARP_RESOLVE) << 16); | |
2817 | nesqp->nesqp_context->ts_val_delta = cpu_to_le32( | |
2818 | jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW)); | |
2819 | nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id); | |
2820 | nesqp->nesqp_context->ird_ord_sizes |= | |
2821 | cpu_to_le32((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT); | |
2822 | ||
2823 | /* Adjust tail for not having a LSMM */ | |
2824 | nesqp->hwqp.sq_tail = 1; | |
2825 | ||
2826 | #if defined(NES_SEND_FIRST_WRITE) | |
2827 | if (cm_node->send_write0) { | |
2828 | nes_debug(NES_DBG_CM, "Sending first write.\n"); | |
2829 | wqe = &nesqp->hwqp.sq_vbase[0]; | |
2830 | u64temp = (unsigned long)nesqp; | |
2831 | u64temp |= NES_SW_CONTEXT_ALIGN>>1; | |
2832 | set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, | |
2833 | u64temp); | |
2834 | wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(NES_IWARP_SQ_OP_RDMAW); | |
2835 | wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0; | |
2836 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0; | |
2837 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0; | |
2838 | wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0; | |
2839 | wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0; | |
2840 | ||
2841 | /* use the reserved spot on the WQ for the extra first WQE */ | |
2842 | nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | | |
2843 | NES_QPCONTEXT_ORDIRD_WRPDU | NES_QPCONTEXT_ORDIRD_ALSMM)); | |
2844 | nesqp->skip_lsmm = 1; | |
2845 | nesqp->hwqp.sq_tail = 0; | |
2846 | nes_write32(nesdev->regs + NES_WQE_ALLOC, | |
2847 | (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id); | |
2848 | } | |
2849 | #endif | |
2850 | ||
2851 | memset(&nes_quad, 0, sizeof(nes_quad)); | |
2852 | ||
2853 | nes_quad.DstIpAdrIndex = cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24); | |
2854 | nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr; | |
2855 | nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port; | |
2856 | nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port; | |
2857 | ||
2858 | /* Produce hash key */ | |
30da7cff FL |
2859 | crc_value = get_crc_value(&nes_quad); |
2860 | nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff); | |
3c2d774c GS |
2861 | nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n", |
2862 | nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask); | |
2863 | ||
2864 | nesqp->hte_index &= nesadapter->hte_index_mask; | |
2865 | nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index); | |
2866 | ||
2867 | nesqp->ietf_frame = &cm_node->mpa_frame; | |
2868 | nesqp->private_data_len = (u8) cm_node->mpa_frame_size; | |
2869 | cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node); | |
2870 | ||
2871 | /* modify QP state to rts */ | |
2872 | attr.qp_state = IB_QPS_RTS; | |
2873 | nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL); | |
2874 | ||
2875 | /* notify OF layer we successfully created the requested connection */ | |
2876 | cm_event.event = IW_CM_EVENT_CONNECT_REPLY; | |
2877 | cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED; | |
2878 | cm_event.provider_data = cm_id->provider_data; | |
2879 | cm_event.local_addr.sin_family = AF_INET; | |
2880 | cm_event.local_addr.sin_port = cm_id->local_addr.sin_port; | |
2881 | cm_event.remote_addr = cm_id->remote_addr; | |
2882 | ||
2883 | cm_event.private_data = (void *)event->cm_node->mpa_frame_buf; | |
2884 | cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size; | |
2885 | ||
2886 | cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr; | |
2887 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2888 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
2889 | ||
2890 | if (ret) | |
2891 | printk("%s[%u] OFA CM event_handler returned, ret=%d\n", | |
2892 | __FUNCTION__, __LINE__, ret); | |
2893 | nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = %lu\n", | |
2894 | nesqp->hwqp.qp_id, jiffies ); | |
2895 | ||
2896 | nes_rem_ref(&nesqp->ibqp); | |
2897 | ||
2898 | return; | |
2899 | } | |
2900 | ||
2901 | ||
2902 | /** | |
2903 | * cm_event_connect_error | |
2904 | */ | |
1a855fbf | 2905 | static void cm_event_connect_error(struct nes_cm_event *event) |
3c2d774c GS |
2906 | { |
2907 | struct nes_qp *nesqp; | |
2908 | struct iw_cm_id *cm_id; | |
2909 | struct iw_cm_event cm_event; | |
2910 | /* struct nes_cm_info cm_info; */ | |
2911 | int ret; | |
2912 | ||
2913 | if (!event->cm_node) | |
2914 | return; | |
2915 | ||
2916 | cm_id = event->cm_node->cm_id; | |
2917 | if (!cm_id) { | |
2918 | return; | |
2919 | } | |
2920 | ||
2921 | nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id); | |
2922 | nesqp = cm_id->provider_data; | |
2923 | ||
2924 | if (!nesqp) { | |
2925 | return; | |
2926 | } | |
2927 | ||
2928 | /* notify OF layer about this connection error event */ | |
2929 | /* cm_id->rem_ref(cm_id); */ | |
2930 | nesqp->cm_id = NULL; | |
2931 | cm_id->provider_data = NULL; | |
2932 | cm_event.event = IW_CM_EVENT_CONNECT_REPLY; | |
2933 | cm_event.status = IW_CM_EVENT_STATUS_REJECTED; | |
2934 | cm_event.provider_data = cm_id->provider_data; | |
2935 | cm_event.local_addr = cm_id->local_addr; | |
2936 | cm_event.remote_addr = cm_id->remote_addr; | |
2937 | cm_event.private_data = NULL; | |
2938 | cm_event.private_data_len = 0; | |
2939 | ||
2940 | nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remove_addr=%08x\n", | |
2941 | cm_event.local_addr.sin_addr.s_addr, cm_event.remote_addr.sin_addr.s_addr); | |
2942 | ||
2943 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2944 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
2945 | if (ret) | |
2946 | printk("%s[%u] OFA CM event_handler returned, ret=%d\n", | |
2947 | __FUNCTION__, __LINE__, ret); | |
2948 | nes_rem_ref(&nesqp->ibqp); | |
2949 | cm_id->rem_ref(cm_id); | |
2950 | ||
2951 | return; | |
2952 | } | |
2953 | ||
2954 | ||
2955 | /** | |
2956 | * cm_event_reset | |
2957 | */ | |
1a855fbf | 2958 | static void cm_event_reset(struct nes_cm_event *event) |
3c2d774c GS |
2959 | { |
2960 | struct nes_qp *nesqp; | |
2961 | struct iw_cm_id *cm_id; | |
2962 | struct iw_cm_event cm_event; | |
2963 | /* struct nes_cm_info cm_info; */ | |
2964 | int ret; | |
2965 | ||
2966 | if (!event->cm_node) | |
2967 | return; | |
2968 | ||
2969 | if (!event->cm_node->cm_id) | |
2970 | return; | |
2971 | ||
2972 | cm_id = event->cm_node->cm_id; | |
2973 | ||
2974 | nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id); | |
2975 | nesqp = cm_id->provider_data; | |
2976 | ||
2977 | nesqp->cm_id = NULL; | |
2978 | /* cm_id->provider_data = NULL; */ | |
2979 | cm_event.event = IW_CM_EVENT_DISCONNECT; | |
2980 | cm_event.status = IW_CM_EVENT_STATUS_RESET; | |
2981 | cm_event.provider_data = cm_id->provider_data; | |
2982 | cm_event.local_addr = cm_id->local_addr; | |
2983 | cm_event.remote_addr = cm_id->remote_addr; | |
2984 | cm_event.private_data = NULL; | |
2985 | cm_event.private_data_len = 0; | |
2986 | ||
2987 | ret = cm_id->event_handler(cm_id, &cm_event); | |
2988 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); | |
2989 | ||
2990 | ||
2991 | /* notify OF layer about this connection error event */ | |
2992 | cm_id->rem_ref(cm_id); | |
2993 | ||
2994 | return; | |
2995 | } | |
2996 | ||
2997 | ||
2998 | /** | |
2999 | * cm_event_mpa_req | |
3000 | */ | |
1a855fbf | 3001 | static void cm_event_mpa_req(struct nes_cm_event *event) |
3c2d774c GS |
3002 | { |
3003 | struct iw_cm_id *cm_id; | |
3004 | struct iw_cm_event cm_event; | |
3005 | int ret; | |
3006 | struct nes_cm_node *cm_node; | |
3007 | ||
3008 | cm_node = event->cm_node; | |
3009 | if (!cm_node) | |
3010 | return; | |
3011 | cm_id = cm_node->cm_id; | |
3012 | ||
3013 | atomic_inc(&cm_connect_reqs); | |
3014 | nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n", | |
3015 | cm_node, cm_id, jiffies); | |
3016 | ||
3017 | cm_event.event = IW_CM_EVENT_CONNECT_REQUEST; | |
3018 | cm_event.status = IW_CM_EVENT_STATUS_OK; | |
3019 | cm_event.provider_data = (void *)cm_node; | |
3020 | ||
3021 | cm_event.local_addr.sin_family = AF_INET; | |
3022 | cm_event.local_addr.sin_port = htons(event->cm_info.loc_port); | |
3023 | cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr); | |
3024 | ||
3025 | cm_event.remote_addr.sin_family = AF_INET; | |
3026 | cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port); | |
3027 | cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr); | |
3028 | ||
3029 | cm_event.private_data = cm_node->mpa_frame_buf; | |
3030 | cm_event.private_data_len = (u8) cm_node->mpa_frame_size; | |
3031 | ||
3032 | ret = cm_id->event_handler(cm_id, &cm_event); | |
3033 | if (ret) | |
3034 | printk("%s[%u] OFA CM event_handler returned, ret=%d\n", | |
3035 | __FUNCTION__, __LINE__, ret); | |
3036 | ||
3037 | return; | |
3038 | } | |
3039 | ||
3040 | ||
3041 | static void nes_cm_event_handler(struct work_struct *); | |
3042 | ||
3043 | /** | |
3044 | * nes_cm_post_event | |
3045 | * post an event to the cm event handler | |
3046 | */ | |
1a855fbf | 3047 | static int nes_cm_post_event(struct nes_cm_event *event) |
3c2d774c GS |
3048 | { |
3049 | atomic_inc(&event->cm_node->cm_core->events_posted); | |
3050 | add_ref_cm_node(event->cm_node); | |
3051 | event->cm_info.cm_id->add_ref(event->cm_info.cm_id); | |
3052 | INIT_WORK(&event->event_work, nes_cm_event_handler); | |
3053 | nes_debug(NES_DBG_CM, "queue_work, event=%p\n", event); | |
3054 | ||
3055 | queue_work(event->cm_node->cm_core->event_wq, &event->event_work); | |
3056 | ||
3057 | nes_debug(NES_DBG_CM, "Exit\n"); | |
3058 | return 0; | |
3059 | } | |
3060 | ||
3061 | ||
3062 | /** | |
3063 | * nes_cm_event_handler | |
3064 | * worker function to handle cm events | |
3065 | * will free instance of nes_cm_event | |
3066 | */ | |
3067 | static void nes_cm_event_handler(struct work_struct *work) | |
3068 | { | |
3069 | struct nes_cm_event *event = container_of(work, struct nes_cm_event, event_work); | |
3070 | struct nes_cm_core *cm_core; | |
3071 | ||
3072 | if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core)) { | |
3073 | return; | |
3074 | } | |
3075 | cm_core = event->cm_node->cm_core; | |
3076 | nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n", | |
3077 | event, event->type, atomic_read(&cm_core->events_posted)); | |
3078 | ||
3079 | switch (event->type) { | |
3080 | case NES_CM_EVENT_MPA_REQ: | |
3081 | cm_event_mpa_req(event); | |
3082 | nes_debug(NES_DBG_CM, "CM Event: MPA REQUEST\n"); | |
3083 | break; | |
3084 | case NES_CM_EVENT_RESET: | |
3085 | nes_debug(NES_DBG_CM, "CM Event: RESET\n"); | |
3086 | cm_event_reset(event); | |
3087 | break; | |
3088 | case NES_CM_EVENT_CONNECTED: | |
3089 | if ((!event->cm_node->cm_id) || | |
3090 | (event->cm_node->state != NES_CM_STATE_TSA)) { | |
3091 | break; | |
3092 | } | |
3093 | cm_event_connected(event); | |
3094 | nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n"); | |
3095 | break; | |
3096 | case NES_CM_EVENT_ABORTED: | |
3097 | if ((!event->cm_node->cm_id) || (event->cm_node->state == NES_CM_STATE_TSA)) { | |
3098 | break; | |
3099 | } | |
3100 | cm_event_connect_error(event); | |
3101 | nes_debug(NES_DBG_CM, "CM Event: ABORTED\n"); | |
3102 | break; | |
3103 | case NES_CM_EVENT_DROPPED_PKT: | |
3104 | nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n"); | |
3105 | break; | |
3106 | default: | |
3107 | nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n"); | |
3108 | break; | |
3109 | } | |
3110 | ||
3111 | atomic_dec(&cm_core->events_posted); | |
3112 | event->cm_info.cm_id->rem_ref(event->cm_info.cm_id); | |
3113 | rem_ref_cm_node(cm_core, event->cm_node); | |
3114 | kfree(event); | |
3115 | ||
3116 | return; | |
3117 | } |