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x86/xen: resume timer irqs early
[linux/fpc-iii.git] / drivers / infiniband / hw / nes / nes_cm.c
blob6b29249aa85a9ed59b24df4c5fc42636371b9181
1 /*
2 * Copyright (c) 2006 - 2011 Intel Corporation. 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 <linux/atomic.h>
38 #include <linux/skbuff.h>
39 #include <linux/ip.h>
40 #include <linux/tcp.h>
41 #include <linux/init.h>
42 #include <linux/if_arp.h>
43 #include <linux/if_vlan.h>
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 #include <linux/highmem.h>
56 #include <linux/slab.h>
57 #include <net/arp.h>
58 #include <net/neighbour.h>
59 #include <net/route.h>
60 #include <net/ip_fib.h>
61 #include <net/tcp.h>
62
63 #include "nes.h"
64
65 u32 cm_packets_sent;
66 u32 cm_packets_bounced;
67 u32 cm_packets_dropped;
68 u32 cm_packets_retrans;
69 u32 cm_packets_created;
70 u32 cm_packets_received;
71 atomic_t cm_listens_created;
72 atomic_t cm_listens_destroyed;
73 u32 cm_backlog_drops;
74 atomic_t cm_loopbacks;
75 atomic_t cm_nodes_created;
76 atomic_t cm_nodes_destroyed;
77 atomic_t cm_accel_dropped_pkts;
78 atomic_t cm_resets_recvd;
79
80 static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *);
81 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, struct nes_vnic *, struct nes_cm_info *);
82 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
83 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, struct nes_vnic *, u16, void *, struct nes_cm_info *);
84 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
85 static int mini_cm_accept(struct nes_cm_core *, struct nes_cm_node *);
86 static int mini_cm_reject(struct nes_cm_core *, struct nes_cm_node *);
87 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, struct sk_buff *);
88 static int mini_cm_dealloc_core(struct nes_cm_core *);
89 static int mini_cm_get(struct nes_cm_core *);
90 static int mini_cm_set(struct nes_cm_core *, u32, u32);
91
92 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *, void *, u32, void *, u32, u8);
93 static int add_ref_cm_node(struct nes_cm_node *);
94 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
95
96 static int nes_cm_disconn_true(struct nes_qp *);
97 static int nes_cm_post_event(struct nes_cm_event *event);
98 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
99 static void nes_disconnect_worker(struct work_struct *work);
100
101 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
102 static int send_mpa_reject(struct nes_cm_node *);
103 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
104 static int send_reset(struct nes_cm_node *, struct sk_buff *);
105 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
106 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
107 static void process_packet(struct nes_cm_node *, struct sk_buff *, struct nes_cm_core *);
108
109 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
110 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
111 static void cleanup_retrans_entry(struct nes_cm_node *);
112 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
113 static void free_retrans_entry(struct nes_cm_node *cm_node);
114 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, struct sk_buff *skb, int optionsize, int passive);
115
116 /* CM event handler functions */
117 static void cm_event_connected(struct nes_cm_event *);
118 static void cm_event_connect_error(struct nes_cm_event *);
119 static void cm_event_reset(struct nes_cm_event *);
120 static void cm_event_mpa_req(struct nes_cm_event *);
121 static void cm_event_mpa_reject(struct nes_cm_event *);
122 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
123
124 /* MPA build functions */
125 static int cm_build_mpa_frame(struct nes_cm_node *, u8 **, u16 *, u8 *, u8);
126 static void build_mpa_v2(struct nes_cm_node *, void *, u8);
127 static void build_mpa_v1(struct nes_cm_node *, void *, u8);
128 static void build_rdma0_msg(struct nes_cm_node *, struct nes_qp **);
129
130 static void print_core(struct nes_cm_core *core);
131
132 /* External CM API Interface */
133 /* instance of function pointers for client API */
134 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
135 static struct nes_cm_ops nes_cm_api = {
136 mini_cm_accelerated,
137 mini_cm_listen,
138 mini_cm_del_listen,
139 mini_cm_connect,
140 mini_cm_close,
141 mini_cm_accept,
142 mini_cm_reject,
143 mini_cm_recv_pkt,
144 mini_cm_dealloc_core,
145 mini_cm_get,
146 mini_cm_set
147 };
148
149 static struct nes_cm_core *g_cm_core;
150
151 atomic_t cm_connects;
152 atomic_t cm_accepts;
153 atomic_t cm_disconnects;
154 atomic_t cm_closes;
155 atomic_t cm_connecteds;
156 atomic_t cm_connect_reqs;
157 atomic_t cm_rejects;
158
159 int nes_add_ref_cm_node(struct nes_cm_node *cm_node)
160 {
161 return add_ref_cm_node(cm_node);
162 }
163
164 int nes_rem_ref_cm_node(struct nes_cm_node *cm_node)
165 {
166 return rem_ref_cm_node(cm_node->cm_core, cm_node);
167 }
168
169 /**
170 * create_event
171 */
172 static struct nes_cm_event *create_event(struct nes_cm_node * cm_node,
173 enum nes_cm_event_type type)
174 {
175 struct nes_cm_event *event;
176
177 if (!cm_node->cm_id)
178 return NULL;
179
180 /* allocate an empty event */
181 event = kzalloc(sizeof(*event), GFP_ATOMIC);
182
183 if (!event)
184 return NULL;
185
186 event->type = type;
187 event->cm_node = cm_node;
188 event->cm_info.rem_addr = cm_node->rem_addr;
189 event->cm_info.loc_addr = cm_node->loc_addr;
190 event->cm_info.rem_port = cm_node->rem_port;
191 event->cm_info.loc_port = cm_node->loc_port;
192 event->cm_info.cm_id = cm_node->cm_id;
193
194 nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
195 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
196 cm_node, event, type, event->cm_info.loc_addr,
197 event->cm_info.loc_port, event->cm_info.rem_addr,
198 event->cm_info.rem_port);
199
200 nes_cm_post_event(event);
201 return event;
202 }
203
204
205 /**
206 * send_mpa_request
207 */
208 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
209 {
210 u8 start_addr = 0;
211 u8 *start_ptr = &start_addr;
212 u8 **start_buff = &start_ptr;
213 u16 buff_len = 0;
214
215 if (!skb) {
216 nes_debug(NES_DBG_CM, "skb set to NULL\n");
217 return -1;
218 }
219
220 /* send an MPA Request frame */
221 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REQUEST);
222 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK);
223
224 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
225 }
226
227
228
229 static int send_mpa_reject(struct nes_cm_node *cm_node)
230 {
231 struct sk_buff *skb = NULL;
232 u8 start_addr = 0;
233 u8 *start_ptr = &start_addr;
234 u8 **start_buff = &start_ptr;
235 u16 buff_len = 0;
236 struct ietf_mpa_v1 *mpa_frame;
237
238 skb = dev_alloc_skb(MAX_CM_BUFFER);
239 if (!skb) {
240 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
241 return -ENOMEM;
242 }
243
244 /* send an MPA reject frame */
245 cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REPLY);
246 mpa_frame = (struct ietf_mpa_v1 *)*start_buff;
247 mpa_frame->flags |= IETF_MPA_FLAGS_REJECT;
248 form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK | SET_FIN);
249
250 cm_node->state = NES_CM_STATE_FIN_WAIT1;
251 return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
252 }
253
254
255 /**
256 * recv_mpa - process a received TCP pkt, we are expecting an
257 * IETF MPA frame
258 */
259 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
260 u32 len)
261 {
262 struct ietf_mpa_v1 *mpa_frame;
263 struct ietf_mpa_v2 *mpa_v2_frame;
264 struct ietf_rtr_msg *rtr_msg;
265 int mpa_hdr_len;
266 int priv_data_len;
267
268 *type = NES_MPA_REQUEST_ACCEPT;
269
270 /* assume req frame is in tcp data payload */
271 if (len < sizeof(struct ietf_mpa_v1)) {
272 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
273 return -EINVAL;
274 }
275
276 /* points to the beginning of the frame, which could be MPA V1 or V2 */
277 mpa_frame = (struct ietf_mpa_v1 *)buffer;
278 mpa_hdr_len = sizeof(struct ietf_mpa_v1);
279 priv_data_len = ntohs(mpa_frame->priv_data_len);
280
281 /* make sure mpa private data len is less than 512 bytes */
282 if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) {
283 nes_debug(NES_DBG_CM, "The received Length of Private"
284 " Data field exceeds 512 octets\n");
285 return -EINVAL;
286 }
287 /*
288 * make sure MPA receiver interoperate with the
289 * received MPA version and MPA key information
290 *
291 */
292 if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) {
293 nes_debug(NES_DBG_CM, "The received mpa version"
294 " is not supported\n");
295 return -EINVAL;
296 }
297 /*
298 * backwards compatibility only
299 */
300 if (mpa_frame->rev > cm_node->mpa_frame_rev) {
301 nes_debug(NES_DBG_CM, "The received mpa version"
302 " can not be interoperated\n");
303 return -EINVAL;
304 } else {
305 cm_node->mpa_frame_rev = mpa_frame->rev;
306 }
307
308 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
309 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
310 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
311 return -EINVAL;
312 }
313 } else {
314 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
315 nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
316 return -EINVAL;
317 }
318 }
319
320
321 if (priv_data_len + mpa_hdr_len != len) {
322 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
323 " complete (%x + %x != %x)\n",
324 priv_data_len, mpa_hdr_len, len);
325 return -EINVAL;
326 }
327 /* make sure it does not exceed the max size */
328 if (len > MAX_CM_BUFFER) {
329 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
330 " (%x + %x != %x)\n",
331 priv_data_len, mpa_hdr_len, len);
332 return -EINVAL;
333 }
334
335 cm_node->mpa_frame_size = priv_data_len;
336
337 switch (mpa_frame->rev) {
338 case IETF_MPA_V2: {
339 u16 ird_size;
340 u16 ord_size;
341 u16 rtr_ctrl_ird;
342 u16 rtr_ctrl_ord;
343
344 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
345 mpa_hdr_len += IETF_RTR_MSG_SIZE;
346 cm_node->mpa_frame_size -= IETF_RTR_MSG_SIZE;
347 rtr_msg = &mpa_v2_frame->rtr_msg;
348
349 /* parse rtr message */
350 rtr_ctrl_ird = ntohs(rtr_msg->ctrl_ird);
351 rtr_ctrl_ord = ntohs(rtr_msg->ctrl_ord);
352 ird_size = rtr_ctrl_ird & IETF_NO_IRD_ORD;
353 ord_size = rtr_ctrl_ord & IETF_NO_IRD_ORD;
354
355 if (!(rtr_ctrl_ird & IETF_PEER_TO_PEER)) {
356 /* send reset */
357 return -EINVAL;
358 }
359
360 if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
361 /* responder */
362 if (cm_node->ord_size > ird_size)
363 cm_node->ord_size = ird_size;
364 } else {
365 /* initiator */
366 if (cm_node->ord_size > ird_size)
367 cm_node->ord_size = ird_size;
368
369 if (cm_node->ird_size < ord_size) {
370 /* no resources available */
371 /* send terminate message */
372 return -EINVAL;
373 }
374 }
375
376 if (rtr_ctrl_ord & IETF_RDMA0_READ) {
377 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
378 } else if (rtr_ctrl_ord & IETF_RDMA0_WRITE) {
379 cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
380 } else { /* Not supported RDMA0 operation */
381 return -EINVAL;
382 }
383 break;
384 }
385 case IETF_MPA_V1:
386 default:
387 break;
388 }
389
390 /* copy entire MPA frame to our cm_node's frame */
391 memcpy(cm_node->mpa_frame_buf, buffer + mpa_hdr_len, cm_node->mpa_frame_size);
392
393 if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
394 *type = NES_MPA_REQUEST_REJECT;
395 return 0;
396 }
397
398
399 /**
400 * form_cm_frame - get a free packet and build empty frame Use
401 * node info to build.
402 */
403 static void form_cm_frame(struct sk_buff *skb,
404 struct nes_cm_node *cm_node, void *options, u32 optionsize,
405 void *data, u32 datasize, u8 flags)
406 {
407 struct tcphdr *tcph;
408 struct iphdr *iph;
409 struct ethhdr *ethh;
410 u8 *buf;
411 u16 packetsize = sizeof(*iph);
412
413 packetsize += sizeof(*tcph);
414 packetsize += optionsize + datasize;
415
416 skb_trim(skb, 0);
417 memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
418
419 buf = skb_put(skb, packetsize + ETH_HLEN);
420
421 ethh = (struct ethhdr *)buf;
422 buf += ETH_HLEN;
423
424 iph = (struct iphdr *)buf;
425 buf += sizeof(*iph);
426 tcph = (struct tcphdr *)buf;
427 skb_reset_mac_header(skb);
428 skb_set_network_header(skb, ETH_HLEN);
429 skb_set_transport_header(skb, ETH_HLEN + sizeof(*iph));
430 buf += sizeof(*tcph);
431
432 skb->ip_summed = CHECKSUM_PARTIAL;
433 if (!(cm_node->netdev->features & NETIF_F_IP_CSUM))
434 skb->ip_summed = CHECKSUM_NONE;
435 skb->protocol = htons(0x800);
436 skb->data_len = 0;
437 skb->mac_len = ETH_HLEN;
438
439 memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
440 memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
441 ethh->h_proto = htons(0x0800);
442
443 iph->version = IPVERSION;
444 iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
445 iph->tos = 0;
446 iph->tot_len = htons(packetsize);
447 iph->id = htons(++cm_node->tcp_cntxt.loc_id);
448
449 iph->frag_off = htons(0x4000);
450 iph->ttl = 0x40;
451 iph->protocol = 0x06; /* IPPROTO_TCP */
452
453 iph->saddr = htonl(cm_node->loc_addr);
454 iph->daddr = htonl(cm_node->rem_addr);
455
456 tcph->source = htons(cm_node->loc_port);
457 tcph->dest = htons(cm_node->rem_port);
458 tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
459
460 if (flags & SET_ACK) {
461 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
462 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
463 tcph->ack = 1;
464 } else {
465 tcph->ack_seq = 0;
466 }
467
468 if (flags & SET_SYN) {
469 cm_node->tcp_cntxt.loc_seq_num++;
470 tcph->syn = 1;
471 } else {
472 cm_node->tcp_cntxt.loc_seq_num += datasize;
473 }
474
475 if (flags & SET_FIN) {
476 cm_node->tcp_cntxt.loc_seq_num++;
477 tcph->fin = 1;
478 }
479
480 if (flags & SET_RST)
481 tcph->rst = 1;
482
483 tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
484 tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
485 tcph->urg_ptr = 0;
486 if (optionsize)
487 memcpy(buf, options, optionsize);
488 buf += optionsize;
489 if (datasize)
490 memcpy(buf, data, datasize);
491
492 skb_shinfo(skb)->nr_frags = 0;
493 cm_packets_created++;
494 }
495
496 /**
497 * print_core - dump a cm core
498 */
499 static void print_core(struct nes_cm_core *core)
500 {
501 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
502 nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
503 if (!core)
504 return;
505 nes_debug(NES_DBG_CM, "---------------------------------------------\n");
506
507 nes_debug(NES_DBG_CM, "State : %u \n", core->state);
508
509 nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
510 nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
511
512 nes_debug(NES_DBG_CM, "core : %p \n", core);
513
514 nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
515 }
516
517 /**
518 * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame
519 */
520 static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff,
521 u16 *buff_len, u8 *pci_mem, u8 mpa_key)
522 {
523 int ret = 0;
524
525 *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0];
526
527 switch (cm_node->mpa_frame_rev) {
528 case IETF_MPA_V1:
529 *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg);
530 *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size;
531 build_mpa_v1(cm_node, *start_buff, mpa_key);
532 break;
533 case IETF_MPA_V2:
534 *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size;
535 build_mpa_v2(cm_node, *start_buff, mpa_key);
536 break;
537 default:
538 ret = -EINVAL;
539 }
540 return ret;
541 }
542
543 /**
544 * build_mpa_v2 - build a MPA V2 frame
545 */
546 static void build_mpa_v2(struct nes_cm_node *cm_node,
547 void *start_addr, u8 mpa_key)
548 {
549 struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
550 struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
551 u16 ctrl_ird;
552 u16 ctrl_ord;
553
554 /* initialize the upper 5 bytes of the frame */
555 build_mpa_v1(cm_node, start_addr, mpa_key);
556 mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */
557 mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
558
559 /* initialize RTR msg */
560 ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
561 IETF_NO_IRD_ORD : cm_node->ird_size;
562 ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
563 IETF_NO_IRD_ORD : cm_node->ord_size;
564
565 ctrl_ird |= IETF_PEER_TO_PEER;
566 ctrl_ird |= IETF_FLPDU_ZERO_LEN;
567
568 switch (mpa_key) {
569 case MPA_KEY_REQUEST:
570 ctrl_ord |= IETF_RDMA0_WRITE;
571 ctrl_ord |= IETF_RDMA0_READ;
572 break;
573 case MPA_KEY_REPLY:
574 switch (cm_node->send_rdma0_op) {
575 case SEND_RDMA_WRITE_ZERO:
576 ctrl_ord |= IETF_RDMA0_WRITE;
577 break;
578 case SEND_RDMA_READ_ZERO:
579 ctrl_ord |= IETF_RDMA0_READ;
580 break;
581 }
582 }
583 rtr_msg->ctrl_ird = htons(ctrl_ird);
584 rtr_msg->ctrl_ord = htons(ctrl_ord);
585 }
586
587 /**
588 * build_mpa_v1 - build a MPA V1 frame
589 */
590 static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key)
591 {
592 struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr;
593
594 switch (mpa_key) {
595 case MPA_KEY_REQUEST:
596 memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
597 break;
598 case MPA_KEY_REPLY:
599 memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
600 break;
601 }
602 mpa_frame->flags = IETF_MPA_FLAGS_CRC;
603 mpa_frame->rev = cm_node->mpa_frame_rev;
604 mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size);
605 }
606
607 static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr)
608 {
609 u64 u64temp;
610 struct nes_qp *nesqp = *nesqp_addr;
611 struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0];
612
613 u64temp = (unsigned long)nesqp;
614 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
615 set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
616
617 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
618 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
619
620 switch (cm_node->send_rdma0_op) {
621 case SEND_RDMA_WRITE_ZERO:
622 nes_debug(NES_DBG_CM, "Sending first write.\n");
623 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
624 cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
625 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
626 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
627 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
628 break;
629
630 case SEND_RDMA_READ_ZERO:
631 default:
632 if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO)
633 WARN(1, "Unsupported RDMA0 len operation=%u\n",
634 cm_node->send_rdma0_op);
635 nes_debug(NES_DBG_CM, "Sending first rdma operation.\n");
636 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
637 cpu_to_le32(NES_IWARP_SQ_OP_RDMAR);
638 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1;
639 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0;
640 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0;
641 wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1;
642 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1;
643 break;
644 }
645
646 if (nesqp->sq_kmapped) {
647 nesqp->sq_kmapped = 0;
648 kunmap(nesqp->page);
649 }
650
651 /*use the reserved spot on the WQ for the extra first WQE*/
652 nesqp->nesqp_context->ird_ord_sizes &= cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
653 NES_QPCONTEXT_ORDIRD_WRPDU |
654 NES_QPCONTEXT_ORDIRD_ALSMM));
655 nesqp->skip_lsmm = 1;
656 nesqp->hwqp.sq_tail = 0;
657 }
658
659 /**
660 * schedule_nes_timer
661 * note - cm_node needs to be protected before calling this. Encase in:
662 * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
663 */
664 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
665 enum nes_timer_type type, int send_retrans,
666 int close_when_complete)
667 {
668 unsigned long flags;
669 struct nes_cm_core *cm_core = cm_node->cm_core;
670 struct nes_timer_entry *new_send;
671 int ret = 0;
672
673 new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
674 if (!new_send)
675 return -ENOMEM;
676
677 /* new_send->timetosend = currenttime */
678 new_send->retrycount = NES_DEFAULT_RETRYS;
679 new_send->retranscount = NES_DEFAULT_RETRANS;
680 new_send->skb = skb;
681 new_send->timetosend = jiffies;
682 new_send->type = type;
683 new_send->netdev = cm_node->netdev;
684 new_send->send_retrans = send_retrans;
685 new_send->close_when_complete = close_when_complete;
686
687 if (type == NES_TIMER_TYPE_CLOSE) {
688 new_send->timetosend += (HZ / 10);
689 if (cm_node->recv_entry) {
690 kfree(new_send);
691 WARN_ON(1);
692 return -EINVAL;
693 }
694 cm_node->recv_entry = new_send;
695 }
696
697 if (type == NES_TIMER_TYPE_SEND) {
698 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
699 atomic_inc(&new_send->skb->users);
700 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
701 cm_node->send_entry = new_send;
702 add_ref_cm_node(cm_node);
703 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
704 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
705
706 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
707 if (ret != NETDEV_TX_OK) {
708 nes_debug(NES_DBG_CM, "Error sending packet %p "
709 "(jiffies = %lu)\n", new_send, jiffies);
710 new_send->timetosend = jiffies;
711 ret = NETDEV_TX_OK;
712 } else {
713 cm_packets_sent++;
714 if (!send_retrans) {
715 cleanup_retrans_entry(cm_node);
716 if (close_when_complete)
717 rem_ref_cm_node(cm_core, cm_node);
718 return ret;
719 }
720 }
721 }
722
723 if (!timer_pending(&cm_core->tcp_timer))
724 mod_timer(&cm_core->tcp_timer, new_send->timetosend);
725
726 return ret;
727 }
728
729 static void nes_retrans_expired(struct nes_cm_node *cm_node)
730 {
731 struct iw_cm_id *cm_id = cm_node->cm_id;
732 enum nes_cm_node_state state = cm_node->state;
733 cm_node->state = NES_CM_STATE_CLOSED;
734
735 switch (state) {
736 case NES_CM_STATE_SYN_RCVD:
737 case NES_CM_STATE_CLOSING:
738 rem_ref_cm_node(cm_node->cm_core, cm_node);
739 break;
740 case NES_CM_STATE_LAST_ACK:
741 case NES_CM_STATE_FIN_WAIT1:
742 if (cm_node->cm_id)
743 cm_id->rem_ref(cm_id);
744 send_reset(cm_node, NULL);
745 break;
746 default:
747 add_ref_cm_node(cm_node);
748 send_reset(cm_node, NULL);
749 create_event(cm_node, NES_CM_EVENT_ABORTED);
750 }
751 }
752
753 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
754 {
755 struct nes_timer_entry *recv_entry = cm_node->recv_entry;
756 struct iw_cm_id *cm_id = cm_node->cm_id;
757 struct nes_qp *nesqp;
758 unsigned long qplockflags;
759
760 if (!recv_entry)
761 return;
762 nesqp = (struct nes_qp *)recv_entry->skb;
763 if (nesqp) {
764 spin_lock_irqsave(&nesqp->lock, qplockflags);
765 if (nesqp->cm_id) {
766 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
767 "refcount = %d: HIT A "
768 "NES_TIMER_TYPE_CLOSE with something "
769 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
770 atomic_read(&nesqp->refcount));
771 nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
772 nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
773 nesqp->ibqp_state = IB_QPS_ERR;
774 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
775 nes_cm_disconn(nesqp);
776 } else {
777 spin_unlock_irqrestore(&nesqp->lock, qplockflags);
778 nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
779 "refcount = %d: HIT A "
780 "NES_TIMER_TYPE_CLOSE with nothing "
781 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
782 atomic_read(&nesqp->refcount));
783 }
784 } else if (rem_node) {
785 /* TIME_WAIT state */
786 rem_ref_cm_node(cm_node->cm_core, cm_node);
787 }
788 if (cm_node->cm_id)
789 cm_id->rem_ref(cm_id);
790 kfree(recv_entry);
791 cm_node->recv_entry = NULL;
792 }
793
794 /**
795 * nes_cm_timer_tick
796 */
797 static void nes_cm_timer_tick(unsigned long pass)
798 {
799 unsigned long flags;
800 unsigned long nexttimeout = jiffies + NES_LONG_TIME;
801 struct nes_cm_node *cm_node;
802 struct nes_timer_entry *send_entry, *recv_entry;
803 struct list_head *list_core_temp;
804 struct list_head *list_node;
805 struct nes_cm_core *cm_core = g_cm_core;
806 u32 settimer = 0;
807 unsigned long timetosend;
808 int ret = NETDEV_TX_OK;
809
810 struct list_head timer_list;
811
812 INIT_LIST_HEAD(&timer_list);
813 spin_lock_irqsave(&cm_core->ht_lock, flags);
814
815 list_for_each_safe(list_node, list_core_temp,
816 &cm_core->connected_nodes) {
817 cm_node = container_of(list_node, struct nes_cm_node, list);
818 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
819 add_ref_cm_node(cm_node);
820 list_add(&cm_node->timer_entry, &timer_list);
821 }
822 }
823 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
824
825 list_for_each_safe(list_node, list_core_temp, &timer_list) {
826 cm_node = container_of(list_node, struct nes_cm_node,
827 timer_entry);
828 recv_entry = cm_node->recv_entry;
829
830 if (recv_entry) {
831 if (time_after(recv_entry->timetosend, jiffies)) {
832 if (nexttimeout > recv_entry->timetosend ||
833 !settimer) {
834 nexttimeout = recv_entry->timetosend;
835 settimer = 1;
836 }
837 } else {
838 handle_recv_entry(cm_node, 1);
839 }
840 }
841
842 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
843 do {
844 send_entry = cm_node->send_entry;
845 if (!send_entry)
846 break;
847 if (time_after(send_entry->timetosend, jiffies)) {
848 if (cm_node->state != NES_CM_STATE_TSA) {
849 if ((nexttimeout >
850 send_entry->timetosend) ||
851 !settimer) {
852 nexttimeout =
853 send_entry->timetosend;
854 settimer = 1;
855 }
856 } else {
857 free_retrans_entry(cm_node);
858 }
859 break;
860 }
861
862 if ((cm_node->state == NES_CM_STATE_TSA) ||
863 (cm_node->state == NES_CM_STATE_CLOSED)) {
864 free_retrans_entry(cm_node);
865 break;
866 }
867
868 if (!send_entry->retranscount ||
869 !send_entry->retrycount) {
870 cm_packets_dropped++;
871 free_retrans_entry(cm_node);
872
873 spin_unlock_irqrestore(
874 &cm_node->retrans_list_lock, flags);
875 nes_retrans_expired(cm_node);
876 cm_node->state = NES_CM_STATE_CLOSED;
877 spin_lock_irqsave(&cm_node->retrans_list_lock,
878 flags);
879 break;
880 }
881 atomic_inc(&send_entry->skb->users);
882 cm_packets_retrans++;
883 nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
884 "for node %p, jiffies = %lu, time to send = "
885 "%lu, retranscount = %u, send_entry->seq_num = "
886 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
887 "0x%08X\n", send_entry, cm_node, jiffies,
888 send_entry->timetosend,
889 send_entry->retranscount,
890 send_entry->seq_num,
891 cm_node->tcp_cntxt.rem_ack_num);
892
893 spin_unlock_irqrestore(&cm_node->retrans_list_lock,
894 flags);
895 ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
896 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
897 if (ret != NETDEV_TX_OK) {
898 nes_debug(NES_DBG_CM, "rexmit failed for "
899 "node=%p\n", cm_node);
900 cm_packets_bounced++;
901 send_entry->retrycount--;
902 nexttimeout = jiffies + NES_SHORT_TIME;
903 settimer = 1;
904 break;
905 } else {
906 cm_packets_sent++;
907 }
908 nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
909 "%u, retry count = %u.\n",
910 send_entry->retranscount,
911 send_entry->retrycount);
912 if (send_entry->send_retrans) {
913 send_entry->retranscount--;
914 timetosend = (NES_RETRY_TIMEOUT <<
915 (NES_DEFAULT_RETRANS - send_entry->retranscount));
916
917 send_entry->timetosend = jiffies +
918 min(timetosend, NES_MAX_TIMEOUT);
919 if (nexttimeout > send_entry->timetosend ||
920 !settimer) {
921 nexttimeout = send_entry->timetosend;
922 settimer = 1;
923 }
924 } else {
925 int close_when_complete;
926 close_when_complete =
927 send_entry->close_when_complete;
928 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
929 cm_node, cm_node->state);
930 free_retrans_entry(cm_node);
931 if (close_when_complete)
932 rem_ref_cm_node(cm_node->cm_core,
933 cm_node);
934 }
935 } while (0);
936
937 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
938 rem_ref_cm_node(cm_node->cm_core, cm_node);
939 }
940
941 if (settimer) {
942 if (!timer_pending(&cm_core->tcp_timer))
943 mod_timer(&cm_core->tcp_timer, nexttimeout);
944 }
945 }
946
947
948 /**
949 * send_syn
950 */
951 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
952 struct sk_buff *skb)
953 {
954 int ret;
955 int flags = SET_SYN;
956 char optionsbuffer[sizeof(struct option_mss) +
957 sizeof(struct option_windowscale) + sizeof(struct option_base) +
958 TCP_OPTIONS_PADDING];
959
960 int optionssize = 0;
961 /* Sending MSS option */
962 union all_known_options *options;
963
964 if (!cm_node)
965 return -EINVAL;
966
967 options = (union all_known_options *)&optionsbuffer[optionssize];
968 options->as_mss.optionnum = OPTION_NUMBER_MSS;
969 options->as_mss.length = sizeof(struct option_mss);
970 options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
971 optionssize += sizeof(struct option_mss);
972
973 options = (union all_known_options *)&optionsbuffer[optionssize];
974 options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
975 options->as_windowscale.length = sizeof(struct option_windowscale);
976 options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
977 optionssize += sizeof(struct option_windowscale);
978
979 if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
980 options = (union all_known_options *)&optionsbuffer[optionssize];
981 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
982 options->as_base.length = sizeof(struct option_base);
983 optionssize += sizeof(struct option_base);
984 /* we need the size to be a multiple of 4 */
985 options = (union all_known_options *)&optionsbuffer[optionssize];
986 options->as_end = 1;
987 optionssize += 1;
988 options = (union all_known_options *)&optionsbuffer[optionssize];
989 options->as_end = 1;
990 optionssize += 1;
991 }
992
993 options = (union all_known_options *)&optionsbuffer[optionssize];
994 options->as_end = OPTION_NUMBER_END;
995 optionssize += 1;
996
997 if (!skb)
998 skb = dev_alloc_skb(MAX_CM_BUFFER);
999 if (!skb) {
1000 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1001 return -1;
1002 }
1003
1004 if (sendack)
1005 flags |= SET_ACK;
1006
1007 form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
1008 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1009
1010 return ret;
1011 }
1012
1013
1014 /**
1015 * send_reset
1016 */
1017 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
1018 {
1019 int ret;
1020 int flags = SET_RST | SET_ACK;
1021
1022 if (!skb)
1023 skb = dev_alloc_skb(MAX_CM_BUFFER);
1024 if (!skb) {
1025 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1026 return -ENOMEM;
1027 }
1028
1029 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
1030 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
1031
1032 return ret;
1033 }
1034
1035
1036 /**
1037 * send_ack
1038 */
1039 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
1040 {
1041 int ret;
1042
1043 if (!skb)
1044 skb = dev_alloc_skb(MAX_CM_BUFFER);
1045
1046 if (!skb) {
1047 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1048 return -1;
1049 }
1050
1051 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
1052 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
1053
1054 return ret;
1055 }
1056
1057
1058 /**
1059 * send_fin
1060 */
1061 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
1062 {
1063 int ret;
1064
1065 /* if we didn't get a frame get one */
1066 if (!skb)
1067 skb = dev_alloc_skb(MAX_CM_BUFFER);
1068
1069 if (!skb) {
1070 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
1071 return -1;
1072 }
1073
1074 form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
1075 ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
1076
1077 return ret;
1078 }
1079
1080
1081 /**
1082 * find_node - find a cm node that matches the reference cm node
1083 */
1084 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
1085 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
1086 {
1087 unsigned long flags;
1088 struct list_head *hte;
1089 struct nes_cm_node *cm_node;
1090
1091 /* get a handle on the hte */
1092 hte = &cm_core->connected_nodes;
1093
1094 /* walk list and find cm_node associated with this session ID */
1095 spin_lock_irqsave(&cm_core->ht_lock, flags);
1096 list_for_each_entry(cm_node, hte, list) {
1097 /* compare quad, return node handle if a match */
1098 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
1099 cm_node->loc_addr, cm_node->loc_port,
1100 loc_addr, loc_port,
1101 cm_node->rem_addr, cm_node->rem_port,
1102 rem_addr, rem_port);
1103 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
1104 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
1105 add_ref_cm_node(cm_node);
1106 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1107 return cm_node;
1108 }
1109 }
1110 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1111
1112 /* no owner node */
1113 return NULL;
1114 }
1115
1116
1117 /**
1118 * find_listener - find a cm node listening on this addr-port pair
1119 */
1120 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
1121 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
1122 {
1123 unsigned long flags;
1124 struct nes_cm_listener *listen_node;
1125
1126 /* walk list and find cm_node associated with this session ID */
1127 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1128 list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
1129 /* compare node pair, return node handle if a match */
1130 if (((listen_node->loc_addr == dst_addr) ||
1131 listen_node->loc_addr == 0x00000000) &&
1132 (listen_node->loc_port == dst_port) &&
1133 (listener_state & listen_node->listener_state)) {
1134 atomic_inc(&listen_node->ref_count);
1135 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1136 return listen_node;
1137 }
1138 }
1139 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1140
1141 /* no listener */
1142 return NULL;
1143 }
1144
1145
1146 /**
1147 * add_hte_node - add a cm node to the hash table
1148 */
1149 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
1150 {
1151 unsigned long flags;
1152 struct list_head *hte;
1153
1154 if (!cm_node || !cm_core)
1155 return -EINVAL;
1156
1157 nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
1158 cm_node);
1159
1160 spin_lock_irqsave(&cm_core->ht_lock, flags);
1161
1162 /* get a handle on the hash table element (list head for this slot) */
1163 hte = &cm_core->connected_nodes;
1164 list_add_tail(&cm_node->list, hte);
1165 atomic_inc(&cm_core->ht_node_cnt);
1166
1167 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1168
1169 return 0;
1170 }
1171
1172
1173 /**
1174 * mini_cm_dec_refcnt_listen
1175 */
1176 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
1177 struct nes_cm_listener *listener, int free_hanging_nodes)
1178 {
1179 int ret = -EINVAL;
1180 int err = 0;
1181 unsigned long flags;
1182 struct list_head *list_pos = NULL;
1183 struct list_head *list_temp = NULL;
1184 struct nes_cm_node *cm_node = NULL;
1185 struct list_head reset_list;
1186
1187 nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
1188 "refcnt=%d\n", listener, free_hanging_nodes,
1189 atomic_read(&listener->ref_count));
1190 /* free non-accelerated child nodes for this listener */
1191 INIT_LIST_HEAD(&reset_list);
1192 if (free_hanging_nodes) {
1193 spin_lock_irqsave(&cm_core->ht_lock, flags);
1194 list_for_each_safe(list_pos, list_temp,
1195 &g_cm_core->connected_nodes) {
1196 cm_node = container_of(list_pos, struct nes_cm_node,
1197 list);
1198 if ((cm_node->listener == listener) &&
1199 (!cm_node->accelerated)) {
1200 add_ref_cm_node(cm_node);
1201 list_add(&cm_node->reset_entry, &reset_list);
1202 }
1203 }
1204 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
1205 }
1206
1207 list_for_each_safe(list_pos, list_temp, &reset_list) {
1208 cm_node = container_of(list_pos, struct nes_cm_node,
1209 reset_entry);
1210 {
1211 struct nes_cm_node *loopback = cm_node->loopbackpartner;
1212 enum nes_cm_node_state old_state;
1213 if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
1214 rem_ref_cm_node(cm_node->cm_core, cm_node);
1215 } else {
1216 if (!loopback) {
1217 cleanup_retrans_entry(cm_node);
1218 err = send_reset(cm_node, NULL);
1219 if (err) {
1220 cm_node->state =
1221 NES_CM_STATE_CLOSED;
1222 WARN_ON(1);
1223 } else {
1224 old_state = cm_node->state;
1225 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1226 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
1227 rem_ref_cm_node(
1228 cm_node->cm_core,
1229 cm_node);
1230 }
1231 } else {
1232 struct nes_cm_event event;
1233
1234 event.cm_node = loopback;
1235 event.cm_info.rem_addr =
1236 loopback->rem_addr;
1237 event.cm_info.loc_addr =
1238 loopback->loc_addr;
1239 event.cm_info.rem_port =
1240 loopback->rem_port;
1241 event.cm_info.loc_port =
1242 loopback->loc_port;
1243 event.cm_info.cm_id = loopback->cm_id;
1244 add_ref_cm_node(loopback);
1245 loopback->state = NES_CM_STATE_CLOSED;
1246 cm_event_connect_error(&event);
1247 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1248
1249 rem_ref_cm_node(cm_node->cm_core,
1250 cm_node);
1251
1252 }
1253 }
1254 }
1255 }
1256
1257 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1258 if (!atomic_dec_return(&listener->ref_count)) {
1259 list_del(&listener->list);
1260
1261 /* decrement our listen node count */
1262 atomic_dec(&cm_core->listen_node_cnt);
1263
1264 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1265
1266 if (listener->nesvnic)
1267 nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1268 PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1269
1270 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1271
1272 kfree(listener);
1273 listener = NULL;
1274 ret = 0;
1275 atomic_inc(&cm_listens_destroyed);
1276 } else {
1277 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1278 }
1279 if (listener) {
1280 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1281 nes_debug(NES_DBG_CM, "destroying listener (%p)"
1282 " with non-zero pending accepts=%u\n",
1283 listener, atomic_read(&listener->pend_accepts_cnt));
1284 }
1285
1286 return ret;
1287 }
1288
1289
1290 /**
1291 * mini_cm_del_listen
1292 */
1293 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1294 struct nes_cm_listener *listener)
1295 {
1296 listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1297 listener->cm_id = NULL; /* going to be destroyed pretty soon */
1298 return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1299 }
1300
1301
1302 /**
1303 * mini_cm_accelerated
1304 */
1305 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1306 struct nes_cm_node *cm_node)
1307 {
1308 cm_node->accelerated = 1;
1309
1310 if (cm_node->accept_pend) {
1311 BUG_ON(!cm_node->listener);
1312 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1313 cm_node->accept_pend = 0;
1314 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1315 }
1316
1317 if (!timer_pending(&cm_core->tcp_timer))
1318 mod_timer(&cm_core->tcp_timer, (jiffies + NES_SHORT_TIME));
1319
1320 return 0;
1321 }
1322
1323
1324 /**
1325 * nes_addr_resolve_neigh
1326 */
1327 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1328 {
1329 struct rtable *rt;
1330 struct neighbour *neigh;
1331 int rc = arpindex;
1332 struct net_device *netdev;
1333 struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1334
1335 rt = ip_route_output(&init_net, htonl(dst_ip), 0, 0, 0);
1336 if (IS_ERR(rt)) {
1337 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1338 __func__, dst_ip);
1339 return rc;
1340 }
1341
1342 if (netif_is_bond_slave(nesvnic->netdev))
1343 netdev = netdev_master_upper_dev_get(nesvnic->netdev);
1344 else
1345 netdev = nesvnic->netdev;
1346
1347 neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, netdev);
1348
1349 rcu_read_lock();
1350 if (neigh) {
1351 if (neigh->nud_state & NUD_VALID) {
1352 nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1353 " is %pM, Gateway is 0x%08X \n", dst_ip,
1354 neigh->ha, ntohl(rt->rt_gateway));
1355
1356 if (arpindex >= 0) {
1357 if (!memcmp(nesadapter->arp_table[arpindex].mac_addr,
1358 neigh->ha, ETH_ALEN)) {
1359 /* Mac address same as in nes_arp_table */
1360 goto out;
1361 }
1362
1363 nes_manage_arp_cache(nesvnic->netdev,
1364 nesadapter->arp_table[arpindex].mac_addr,
1365 dst_ip, NES_ARP_DELETE);
1366 }
1367
1368 nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1369 dst_ip, NES_ARP_ADD);
1370 rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1371 NES_ARP_RESOLVE);
1372 } else {
1373 neigh_event_send(neigh, NULL);
1374 }
1375 }
1376 out:
1377 rcu_read_unlock();
1378
1379 if (neigh)
1380 neigh_release(neigh);
1381
1382 ip_rt_put(rt);
1383 return rc;
1384 }
1385
1386 /**
1387 * make_cm_node - create a new instance of a cm node
1388 */
1389 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1390 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1391 struct nes_cm_listener *listener)
1392 {
1393 struct nes_cm_node *cm_node;
1394 struct timespec ts;
1395 int oldarpindex = 0;
1396 int arpindex = 0;
1397 struct nes_device *nesdev;
1398 struct nes_adapter *nesadapter;
1399
1400 /* create an hte and cm_node for this instance */
1401 cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1402 if (!cm_node)
1403 return NULL;
1404
1405 /* set our node specific transport info */
1406 cm_node->loc_addr = cm_info->loc_addr;
1407 cm_node->rem_addr = cm_info->rem_addr;
1408 cm_node->loc_port = cm_info->loc_port;
1409 cm_node->rem_port = cm_info->rem_port;
1410
1411 cm_node->mpa_frame_rev = mpa_version;
1412 cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
1413 cm_node->ird_size = IETF_NO_IRD_ORD;
1414 cm_node->ord_size = IETF_NO_IRD_ORD;
1415
1416 nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1417 &cm_node->loc_addr, cm_node->loc_port,
1418 &cm_node->rem_addr, cm_node->rem_port);
1419 cm_node->listener = listener;
1420 cm_node->netdev = nesvnic->netdev;
1421 cm_node->cm_id = cm_info->cm_id;
1422 memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1423
1424 nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1425 cm_node->cm_id);
1426
1427 spin_lock_init(&cm_node->retrans_list_lock);
1428
1429 cm_node->loopbackpartner = NULL;
1430 atomic_set(&cm_node->ref_count, 1);
1431 /* associate our parent CM core */
1432 cm_node->cm_core = cm_core;
1433 cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1434 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1435 cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1436 NES_CM_DEFAULT_RCV_WND_SCALE;
1437 ts = current_kernel_time();
1438 cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1439 cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1440 sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1441 cm_node->tcp_cntxt.rcv_nxt = 0;
1442 /* get a unique session ID , add thread_id to an upcounter to handle race */
1443 atomic_inc(&cm_core->node_cnt);
1444 cm_node->conn_type = cm_info->conn_type;
1445 cm_node->apbvt_set = 0;
1446 cm_node->accept_pend = 0;
1447
1448 cm_node->nesvnic = nesvnic;
1449 /* get some device handles, for arp lookup */
1450 nesdev = nesvnic->nesdev;
1451 nesadapter = nesdev->nesadapter;
1452
1453 cm_node->loopbackpartner = NULL;
1454
1455 /* get the mac addr for the remote node */
1456 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1457 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr, oldarpindex);
1458 if (arpindex < 0) {
1459 kfree(cm_node);
1460 return NULL;
1461 }
1462
1463 /* copy the mac addr to node context */
1464 memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1465 nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1466 cm_node->rem_mac);
1467
1468 add_hte_node(cm_core, cm_node);
1469 atomic_inc(&cm_nodes_created);
1470
1471 return cm_node;
1472 }
1473
1474
1475 /**
1476 * add_ref_cm_node - destroy an instance of a cm node
1477 */
1478 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1479 {
1480 atomic_inc(&cm_node->ref_count);
1481 return 0;
1482 }
1483
1484
1485 /**
1486 * rem_ref_cm_node - destroy an instance of a cm node
1487 */
1488 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1489 struct nes_cm_node *cm_node)
1490 {
1491 unsigned long flags;
1492 struct nes_qp *nesqp;
1493
1494 if (!cm_node)
1495 return -EINVAL;
1496
1497 spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1498 if (atomic_dec_return(&cm_node->ref_count)) {
1499 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1500 return 0;
1501 }
1502 list_del(&cm_node->list);
1503 atomic_dec(&cm_core->ht_node_cnt);
1504 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1505
1506 /* if the node is destroyed before connection was accelerated */
1507 if (!cm_node->accelerated && cm_node->accept_pend) {
1508 BUG_ON(!cm_node->listener);
1509 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1510 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1511 }
1512 WARN_ON(cm_node->send_entry);
1513 if (cm_node->recv_entry)
1514 handle_recv_entry(cm_node, 0);
1515 if (cm_node->listener) {
1516 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1517 } else {
1518 if (cm_node->apbvt_set && cm_node->nesvnic) {
1519 nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1520 PCI_FUNC(
1521 cm_node->nesvnic->nesdev->pcidev->devfn),
1522 NES_MANAGE_APBVT_DEL);
1523 }
1524 }
1525
1526 atomic_dec(&cm_core->node_cnt);
1527 atomic_inc(&cm_nodes_destroyed);
1528 nesqp = cm_node->nesqp;
1529 if (nesqp) {
1530 nesqp->cm_node = NULL;
1531 nes_rem_ref(&nesqp->ibqp);
1532 cm_node->nesqp = NULL;
1533 }
1534
1535 kfree(cm_node);
1536 return 0;
1537 }
1538
1539 /**
1540 * process_options
1541 */
1542 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1543 u32 optionsize, u32 syn_packet)
1544 {
1545 u32 tmp;
1546 u32 offset = 0;
1547 union all_known_options *all_options;
1548 char got_mss_option = 0;
1549
1550 while (offset < optionsize) {
1551 all_options = (union all_known_options *)(optionsloc + offset);
1552 switch (all_options->as_base.optionnum) {
1553 case OPTION_NUMBER_END:
1554 offset = optionsize;
1555 break;
1556 case OPTION_NUMBER_NONE:
1557 offset += 1;
1558 continue;
1559 case OPTION_NUMBER_MSS:
1560 nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1561 "Size: %d\n", __func__,
1562 all_options->as_mss.length, offset, optionsize);
1563 got_mss_option = 1;
1564 if (all_options->as_mss.length != 4) {
1565 return 1;
1566 } else {
1567 tmp = ntohs(all_options->as_mss.mss);
1568 if (tmp > 0 && tmp <
1569 cm_node->tcp_cntxt.mss)
1570 cm_node->tcp_cntxt.mss = tmp;
1571 }
1572 break;
1573 case OPTION_NUMBER_WINDOW_SCALE:
1574 cm_node->tcp_cntxt.snd_wscale =
1575 all_options->as_windowscale.shiftcount;
1576 break;
1577 default:
1578 nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1579 all_options->as_base.optionnum);
1580 break;
1581 }
1582 offset += all_options->as_base.length;
1583 }
1584 if ((!got_mss_option) && (syn_packet))
1585 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1586 return 0;
1587 }
1588
1589 static void drop_packet(struct sk_buff *skb)
1590 {
1591 atomic_inc(&cm_accel_dropped_pkts);
1592 dev_kfree_skb_any(skb);
1593 }
1594
1595 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1596 {
1597 nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1598 "refcnt=%d\n", cm_node, cm_node->state,
1599 atomic_read(&cm_node->ref_count));
1600 switch (cm_node->state) {
1601 case NES_CM_STATE_SYN_RCVD:
1602 case NES_CM_STATE_SYN_SENT:
1603 case NES_CM_STATE_ESTABLISHED:
1604 case NES_CM_STATE_MPAREJ_RCVD:
1605 cm_node->tcp_cntxt.rcv_nxt++;
1606 cleanup_retrans_entry(cm_node);
1607 cm_node->state = NES_CM_STATE_LAST_ACK;
1608 send_fin(cm_node, NULL);
1609 break;
1610 case NES_CM_STATE_MPAREQ_SENT:
1611 create_event(cm_node, NES_CM_EVENT_ABORTED);
1612 cm_node->tcp_cntxt.rcv_nxt++;
1613 cleanup_retrans_entry(cm_node);
1614 cm_node->state = NES_CM_STATE_CLOSED;
1615 add_ref_cm_node(cm_node);
1616 send_reset(cm_node, NULL);
1617 break;
1618 case NES_CM_STATE_FIN_WAIT1:
1619 cm_node->tcp_cntxt.rcv_nxt++;
1620 cleanup_retrans_entry(cm_node);
1621 cm_node->state = NES_CM_STATE_CLOSING;
1622 send_ack(cm_node, NULL);
1623 /* Wait for ACK as this is simultaneous close..
1624 * After we receive ACK, do not send anything..
1625 * Just rm the node.. Done.. */
1626 break;
1627 case NES_CM_STATE_FIN_WAIT2:
1628 cm_node->tcp_cntxt.rcv_nxt++;
1629 cleanup_retrans_entry(cm_node);
1630 cm_node->state = NES_CM_STATE_TIME_WAIT;
1631 send_ack(cm_node, NULL);
1632 schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0);
1633 break;
1634 case NES_CM_STATE_TIME_WAIT:
1635 cm_node->tcp_cntxt.rcv_nxt++;
1636 cleanup_retrans_entry(cm_node);
1637 cm_node->state = NES_CM_STATE_CLOSED;
1638 rem_ref_cm_node(cm_node->cm_core, cm_node);
1639 break;
1640 case NES_CM_STATE_TSA:
1641 default:
1642 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1643 cm_node, cm_node->state);
1644 break;
1645 }
1646 }
1647
1648
1649 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1650 struct tcphdr *tcph)
1651 {
1652
1653 int reset = 0; /* whether to send reset in case of err.. */
1654 atomic_inc(&cm_resets_recvd);
1655 nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1656 " refcnt=%d\n", cm_node, cm_node->state,
1657 atomic_read(&cm_node->ref_count));
1658 cleanup_retrans_entry(cm_node);
1659 switch (cm_node->state) {
1660 case NES_CM_STATE_SYN_SENT:
1661 case NES_CM_STATE_MPAREQ_SENT:
1662 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1663 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1664 cm_node->listener, cm_node->state);
1665 switch (cm_node->mpa_frame_rev) {
1666 case IETF_MPA_V2:
1667 cm_node->mpa_frame_rev = IETF_MPA_V1;
1668 /* send a syn and goto syn sent state */
1669 cm_node->state = NES_CM_STATE_SYN_SENT;
1670 if (send_syn(cm_node, 0, NULL)) {
1671 active_open_err(cm_node, skb, reset);
1672 }
1673 break;
1674 case IETF_MPA_V1:
1675 default:
1676 active_open_err(cm_node, skb, reset);
1677 break;
1678 }
1679 break;
1680 case NES_CM_STATE_MPAREQ_RCVD:
1681 atomic_inc(&cm_node->passive_state);
1682 dev_kfree_skb_any(skb);
1683 break;
1684 case NES_CM_STATE_ESTABLISHED:
1685 case NES_CM_STATE_SYN_RCVD:
1686 case NES_CM_STATE_LISTENING:
1687 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1688 passive_open_err(cm_node, skb, reset);
1689 break;
1690 case NES_CM_STATE_TSA:
1691 active_open_err(cm_node, skb, reset);
1692 break;
1693 case NES_CM_STATE_CLOSED:
1694 drop_packet(skb);
1695 break;
1696 case NES_CM_STATE_FIN_WAIT2:
1697 case NES_CM_STATE_FIN_WAIT1:
1698 case NES_CM_STATE_LAST_ACK:
1699 cm_node->cm_id->rem_ref(cm_node->cm_id);
1700 case NES_CM_STATE_TIME_WAIT:
1701 cm_node->state = NES_CM_STATE_CLOSED;
1702 rem_ref_cm_node(cm_node->cm_core, cm_node);
1703 drop_packet(skb);
1704 break;
1705 default:
1706 drop_packet(skb);
1707 break;
1708 }
1709 }
1710
1711
1712 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1713 {
1714 int ret = 0;
1715 int datasize = skb->len;
1716 u8 *dataloc = skb->data;
1717
1718 enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1719 u32 res_type;
1720
1721 ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1722 if (ret) {
1723 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1724 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1725 nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1726 "cm_node=%p listener=%p state=%d\n", __func__,
1727 __LINE__, cm_node, cm_node->listener,
1728 cm_node->state);
1729 active_open_err(cm_node, skb, 1);
1730 } else {
1731 passive_open_err(cm_node, skb, 1);
1732 }
1733 return;
1734 }
1735
1736 switch (cm_node->state) {
1737 case NES_CM_STATE_ESTABLISHED:
1738 if (res_type == NES_MPA_REQUEST_REJECT)
1739 /*BIG problem as we are receiving the MPA.. So should
1740 * not be REJECT.. This is Passive Open.. We can
1741 * only receive it Reject for Active Open...*/
1742 WARN_ON(1);
1743 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1744 type = NES_CM_EVENT_MPA_REQ;
1745 atomic_set(&cm_node->passive_state,
1746 NES_PASSIVE_STATE_INDICATED);
1747 break;
1748 case NES_CM_STATE_MPAREQ_SENT:
1749 cleanup_retrans_entry(cm_node);
1750 if (res_type == NES_MPA_REQUEST_REJECT) {
1751 type = NES_CM_EVENT_MPA_REJECT;
1752 cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1753 } else {
1754 type = NES_CM_EVENT_CONNECTED;
1755 cm_node->state = NES_CM_STATE_TSA;
1756 }
1757
1758 break;
1759 default:
1760 WARN_ON(1);
1761 break;
1762 }
1763 dev_kfree_skb_any(skb);
1764 create_event(cm_node, type);
1765 }
1766
1767 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1768 {
1769 switch (cm_node->state) {
1770 case NES_CM_STATE_SYN_SENT:
1771 case NES_CM_STATE_MPAREQ_SENT:
1772 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1773 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1774 cm_node->listener, cm_node->state);
1775 active_open_err(cm_node, skb, 1);
1776 break;
1777 case NES_CM_STATE_ESTABLISHED:
1778 case NES_CM_STATE_SYN_RCVD:
1779 passive_open_err(cm_node, skb, 1);
1780 break;
1781 case NES_CM_STATE_TSA:
1782 default:
1783 drop_packet(skb);
1784 }
1785 }
1786
1787 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1788 struct sk_buff *skb)
1789 {
1790 int err;
1791
1792 err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;
1793 if (err)
1794 active_open_err(cm_node, skb, 1);
1795
1796 return err;
1797 }
1798
1799 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1800 struct sk_buff *skb)
1801 {
1802 int err = 0;
1803 u32 seq;
1804 u32 ack_seq;
1805 u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1806 u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1807 u32 rcv_wnd;
1808
1809 seq = ntohl(tcph->seq);
1810 ack_seq = ntohl(tcph->ack_seq);
1811 rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1812 if (ack_seq != loc_seq_num)
1813 err = 1;
1814 else if (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd)))
1815 err = 1;
1816 if (err) {
1817 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1818 "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1819 cm_node->listener, cm_node->state);
1820 indicate_pkt_err(cm_node, skb);
1821 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1822 "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1823 rcv_wnd);
1824 }
1825 return err;
1826 }
1827
1828 /*
1829 * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1830 * is created with a listener or it may comein as rexmitted packet which in
1831 * that case will be just dropped.
1832 */
1833 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1834 struct tcphdr *tcph)
1835 {
1836 int ret;
1837 u32 inc_sequence;
1838 int optionsize;
1839
1840 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1841 skb_trim(skb, 0);
1842 inc_sequence = ntohl(tcph->seq);
1843
1844 switch (cm_node->state) {
1845 case NES_CM_STATE_SYN_SENT:
1846 case NES_CM_STATE_MPAREQ_SENT:
1847 /* Rcvd syn on active open connection*/
1848 active_open_err(cm_node, skb, 1);
1849 break;
1850 case NES_CM_STATE_LISTENING:
1851 /* Passive OPEN */
1852 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1853 cm_node->listener->backlog) {
1854 nes_debug(NES_DBG_CM, "drop syn due to backlog "
1855 "pressure \n");
1856 cm_backlog_drops++;
1857 passive_open_err(cm_node, skb, 0);
1858 break;
1859 }
1860 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1861 1);
1862 if (ret) {
1863 passive_open_err(cm_node, skb, 0);
1864 /* drop pkt */
1865 break;
1866 }
1867 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1868 BUG_ON(cm_node->send_entry);
1869 cm_node->accept_pend = 1;
1870 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1871
1872 cm_node->state = NES_CM_STATE_SYN_RCVD;
1873 send_syn(cm_node, 1, skb);
1874 break;
1875 case NES_CM_STATE_CLOSED:
1876 cleanup_retrans_entry(cm_node);
1877 add_ref_cm_node(cm_node);
1878 send_reset(cm_node, skb);
1879 break;
1880 case NES_CM_STATE_TSA:
1881 case NES_CM_STATE_ESTABLISHED:
1882 case NES_CM_STATE_FIN_WAIT1:
1883 case NES_CM_STATE_FIN_WAIT2:
1884 case NES_CM_STATE_MPAREQ_RCVD:
1885 case NES_CM_STATE_LAST_ACK:
1886 case NES_CM_STATE_CLOSING:
1887 case NES_CM_STATE_UNKNOWN:
1888 default:
1889 drop_packet(skb);
1890 break;
1891 }
1892 }
1893
1894 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1895 struct tcphdr *tcph)
1896 {
1897 int ret;
1898 u32 inc_sequence;
1899 int optionsize;
1900
1901 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1902 skb_trim(skb, 0);
1903 inc_sequence = ntohl(tcph->seq);
1904 switch (cm_node->state) {
1905 case NES_CM_STATE_SYN_SENT:
1906 cleanup_retrans_entry(cm_node);
1907 /* active open */
1908 if (check_syn(cm_node, tcph, skb))
1909 return;
1910 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1911 /* setup options */
1912 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1913 if (ret) {
1914 nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1915 cm_node);
1916 break;
1917 }
1918 cleanup_retrans_entry(cm_node);
1919 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1920 send_mpa_request(cm_node, skb);
1921 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1922 break;
1923 case NES_CM_STATE_MPAREQ_RCVD:
1924 /* passive open, so should not be here */
1925 passive_open_err(cm_node, skb, 1);
1926 break;
1927 case NES_CM_STATE_LISTENING:
1928 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1929 cleanup_retrans_entry(cm_node);
1930 cm_node->state = NES_CM_STATE_CLOSED;
1931 send_reset(cm_node, skb);
1932 break;
1933 case NES_CM_STATE_CLOSED:
1934 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1935 cleanup_retrans_entry(cm_node);
1936 add_ref_cm_node(cm_node);
1937 send_reset(cm_node, skb);
1938 break;
1939 case NES_CM_STATE_ESTABLISHED:
1940 case NES_CM_STATE_FIN_WAIT1:
1941 case NES_CM_STATE_FIN_WAIT2:
1942 case NES_CM_STATE_LAST_ACK:
1943 case NES_CM_STATE_TSA:
1944 case NES_CM_STATE_CLOSING:
1945 case NES_CM_STATE_UNKNOWN:
1946 case NES_CM_STATE_MPAREQ_SENT:
1947 default:
1948 drop_packet(skb);
1949 break;
1950 }
1951 }
1952
1953 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1954 struct tcphdr *tcph)
1955 {
1956 int datasize = 0;
1957 u32 inc_sequence;
1958 int ret = 0;
1959 int optionsize;
1960
1961 optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1962
1963 if (check_seq(cm_node, tcph, skb))
1964 return -EINVAL;
1965
1966 skb_pull(skb, tcph->doff << 2);
1967 inc_sequence = ntohl(tcph->seq);
1968 datasize = skb->len;
1969 switch (cm_node->state) {
1970 case NES_CM_STATE_SYN_RCVD:
1971 /* Passive OPEN */
1972 cleanup_retrans_entry(cm_node);
1973 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1974 if (ret)
1975 break;
1976 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1977 cm_node->state = NES_CM_STATE_ESTABLISHED;
1978 if (datasize) {
1979 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1980 handle_rcv_mpa(cm_node, skb);
1981 } else { /* rcvd ACK only */
1982 dev_kfree_skb_any(skb);
1983 }
1984 break;
1985 case NES_CM_STATE_ESTABLISHED:
1986 /* Passive OPEN */
1987 cleanup_retrans_entry(cm_node);
1988 if (datasize) {
1989 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1990 handle_rcv_mpa(cm_node, skb);
1991 } else {
1992 drop_packet(skb);
1993 }
1994 break;
1995 case NES_CM_STATE_MPAREQ_SENT:
1996 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1997 if (datasize) {
1998 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1999 handle_rcv_mpa(cm_node, skb);
2000 } else { /* Could be just an ack pkt.. */
2001 dev_kfree_skb_any(skb);
2002 }
2003 break;
2004 case NES_CM_STATE_LISTENING:
2005 cleanup_retrans_entry(cm_node);
2006 cm_node->state = NES_CM_STATE_CLOSED;
2007 send_reset(cm_node, skb);
2008 break;
2009 case NES_CM_STATE_CLOSED:
2010 cleanup_retrans_entry(cm_node);
2011 add_ref_cm_node(cm_node);
2012 send_reset(cm_node, skb);
2013 break;
2014 case NES_CM_STATE_LAST_ACK:
2015 case NES_CM_STATE_CLOSING:
2016 cleanup_retrans_entry(cm_node);
2017 cm_node->state = NES_CM_STATE_CLOSED;
2018 cm_node->cm_id->rem_ref(cm_node->cm_id);
2019 rem_ref_cm_node(cm_node->cm_core, cm_node);
2020 drop_packet(skb);
2021 break;
2022 case NES_CM_STATE_FIN_WAIT1:
2023 cleanup_retrans_entry(cm_node);
2024 drop_packet(skb);
2025 cm_node->state = NES_CM_STATE_FIN_WAIT2;
2026 break;
2027 case NES_CM_STATE_SYN_SENT:
2028 case NES_CM_STATE_FIN_WAIT2:
2029 case NES_CM_STATE_TSA:
2030 case NES_CM_STATE_MPAREQ_RCVD:
2031 case NES_CM_STATE_UNKNOWN:
2032 default:
2033 cleanup_retrans_entry(cm_node);
2034 drop_packet(skb);
2035 break;
2036 }
2037 return ret;
2038 }
2039
2040
2041
2042 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
2043 struct sk_buff *skb, int optionsize, int passive)
2044 {
2045 u8 *optionsloc = (u8 *)&tcph[1];
2046
2047 if (optionsize) {
2048 if (process_options(cm_node, optionsloc, optionsize,
2049 (u32)tcph->syn)) {
2050 nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
2051 __func__, cm_node);
2052 if (passive)
2053 passive_open_err(cm_node, skb, 1);
2054 else
2055 active_open_err(cm_node, skb, 1);
2056 return 1;
2057 }
2058 }
2059
2060 cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
2061 cm_node->tcp_cntxt.snd_wscale;
2062
2063 if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
2064 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
2065 return 0;
2066 }
2067
2068 /*
2069 * active_open_err() will send reset() if flag set..
2070 * It will also send ABORT event.
2071 */
2072 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2073 int reset)
2074 {
2075 cleanup_retrans_entry(cm_node);
2076 if (reset) {
2077 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
2078 "state=%d\n", cm_node, cm_node->state);
2079 add_ref_cm_node(cm_node);
2080 send_reset(cm_node, skb);
2081 } else {
2082 dev_kfree_skb_any(skb);
2083 }
2084
2085 cm_node->state = NES_CM_STATE_CLOSED;
2086 create_event(cm_node, NES_CM_EVENT_ABORTED);
2087 }
2088
2089 /*
2090 * passive_open_err() will either do a reset() or will free up the skb and
2091 * remove the cm_node.
2092 */
2093 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
2094 int reset)
2095 {
2096 cleanup_retrans_entry(cm_node);
2097 cm_node->state = NES_CM_STATE_CLOSED;
2098 if (reset) {
2099 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
2100 "cm_node=%p state =%d\n", cm_node, cm_node->state);
2101 send_reset(cm_node, skb);
2102 } else {
2103 dev_kfree_skb_any(skb);
2104 rem_ref_cm_node(cm_node->cm_core, cm_node);
2105 }
2106 }
2107
2108 /*
2109 * free_retrans_entry() routines assumes that the retrans_list_lock has
2110 * been acquired before calling.
2111 */
2112 static void free_retrans_entry(struct nes_cm_node *cm_node)
2113 {
2114 struct nes_timer_entry *send_entry;
2115
2116 send_entry = cm_node->send_entry;
2117 if (send_entry) {
2118 cm_node->send_entry = NULL;
2119 dev_kfree_skb_any(send_entry->skb);
2120 kfree(send_entry);
2121 rem_ref_cm_node(cm_node->cm_core, cm_node);
2122 }
2123 }
2124
2125 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
2126 {
2127 unsigned long flags;
2128
2129 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
2130 free_retrans_entry(cm_node);
2131 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
2132 }
2133
2134 /**
2135 * process_packet
2136 * Returns skb if to be freed, else it will return NULL if already used..
2137 */
2138 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
2139 struct nes_cm_core *cm_core)
2140 {
2141 enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
2142 struct tcphdr *tcph = tcp_hdr(skb);
2143 u32 fin_set = 0;
2144 int ret = 0;
2145
2146 skb_pull(skb, ip_hdr(skb)->ihl << 2);
2147
2148 nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
2149 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
2150 tcph->ack, tcph->rst, tcph->fin);
2151
2152 if (tcph->rst) {
2153 pkt_type = NES_PKT_TYPE_RST;
2154 } else if (tcph->syn) {
2155 pkt_type = NES_PKT_TYPE_SYN;
2156 if (tcph->ack)
2157 pkt_type = NES_PKT_TYPE_SYNACK;
2158 } else if (tcph->ack) {
2159 pkt_type = NES_PKT_TYPE_ACK;
2160 }
2161 if (tcph->fin)
2162 fin_set = 1;
2163
2164 switch (pkt_type) {
2165 case NES_PKT_TYPE_SYN:
2166 handle_syn_pkt(cm_node, skb, tcph);
2167 break;
2168 case NES_PKT_TYPE_SYNACK:
2169 handle_synack_pkt(cm_node, skb, tcph);
2170 break;
2171 case NES_PKT_TYPE_ACK:
2172 ret = handle_ack_pkt(cm_node, skb, tcph);
2173 if (fin_set && !ret)
2174 handle_fin_pkt(cm_node);
2175 break;
2176 case NES_PKT_TYPE_RST:
2177 handle_rst_pkt(cm_node, skb, tcph);
2178 break;
2179 default:
2180 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
2181 handle_fin_pkt(cm_node);
2182 drop_packet(skb);
2183 break;
2184 }
2185 }
2186
2187 /**
2188 * mini_cm_listen - create a listen node with params
2189 */
2190 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
2191 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
2192 {
2193 struct nes_cm_listener *listener;
2194 unsigned long flags;
2195
2196 nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
2197 cm_info->loc_addr, cm_info->loc_port);
2198
2199 /* cannot have multiple matching listeners */
2200 listener = find_listener(cm_core, htonl(cm_info->loc_addr),
2201 htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
2202 if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
2203 /* find automatically incs ref count ??? */
2204 atomic_dec(&listener->ref_count);
2205 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
2206 return NULL;
2207 }
2208
2209 if (!listener) {
2210 /* create a CM listen node (1/2 node to compare incoming traffic to) */
2211 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
2212 if (!listener) {
2213 nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
2214 return NULL;
2215 }
2216
2217 listener->loc_addr = htonl(cm_info->loc_addr);
2218 listener->loc_port = htons(cm_info->loc_port);
2219 listener->reused_node = 0;
2220
2221 atomic_set(&listener->ref_count, 1);
2222 }
2223 /* pasive case */
2224 /* find already inc'ed the ref count */
2225 else {
2226 listener->reused_node = 1;
2227 }
2228
2229 listener->cm_id = cm_info->cm_id;
2230 atomic_set(&listener->pend_accepts_cnt, 0);
2231 listener->cm_core = cm_core;
2232 listener->nesvnic = nesvnic;
2233 atomic_inc(&cm_core->node_cnt);
2234
2235 listener->conn_type = cm_info->conn_type;
2236 listener->backlog = cm_info->backlog;
2237 listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
2238
2239 if (!listener->reused_node) {
2240 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2241 list_add(&listener->list, &cm_core->listen_list.list);
2242 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2243 atomic_inc(&cm_core->listen_node_cnt);
2244 }
2245
2246 nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2247 " listener = %p, backlog = %d, cm_id = %p.\n",
2248 cm_info->loc_addr, cm_info->loc_port,
2249 listener, listener->backlog, listener->cm_id);
2250
2251 return listener;
2252 }
2253
2254
2255 /**
2256 * mini_cm_connect - make a connection node with params
2257 */
2258 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2259 struct nes_vnic *nesvnic, u16 private_data_len,
2260 void *private_data, struct nes_cm_info *cm_info)
2261 {
2262 int ret = 0;
2263 struct nes_cm_node *cm_node;
2264 struct nes_cm_listener *loopbackremotelistener;
2265 struct nes_cm_node *loopbackremotenode;
2266 struct nes_cm_info loopback_cm_info;
2267 u8 *start_buff;
2268
2269 /* create a CM connection node */
2270 cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2271 if (!cm_node)
2272 return NULL;
2273
2274 /* set our node side to client (active) side */
2275 cm_node->tcp_cntxt.client = 1;
2276 cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2277
2278 if (cm_info->loc_addr == cm_info->rem_addr) {
2279 loopbackremotelistener = find_listener(cm_core,
2280 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2281 NES_CM_LISTENER_ACTIVE_STATE);
2282 if (loopbackremotelistener == NULL) {
2283 create_event(cm_node, NES_CM_EVENT_ABORTED);
2284 } else {
2285 loopback_cm_info = *cm_info;
2286 loopback_cm_info.loc_port = cm_info->rem_port;
2287 loopback_cm_info.rem_port = cm_info->loc_port;
2288 loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2289 loopbackremotenode = make_cm_node(cm_core, nesvnic,
2290 &loopback_cm_info, loopbackremotelistener);
2291 if (!loopbackremotenode) {
2292 rem_ref_cm_node(cm_node->cm_core, cm_node);
2293 return NULL;
2294 }
2295 atomic_inc(&cm_loopbacks);
2296 loopbackremotenode->loopbackpartner = cm_node;
2297 loopbackremotenode->tcp_cntxt.rcv_wscale =
2298 NES_CM_DEFAULT_RCV_WND_SCALE;
2299 cm_node->loopbackpartner = loopbackremotenode;
2300 memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2301 private_data_len);
2302 loopbackremotenode->mpa_frame_size = private_data_len;
2303
2304 /* we are done handling this state. */
2305 /* set node to a TSA state */
2306 cm_node->state = NES_CM_STATE_TSA;
2307 cm_node->tcp_cntxt.rcv_nxt =
2308 loopbackremotenode->tcp_cntxt.loc_seq_num;
2309 loopbackremotenode->tcp_cntxt.rcv_nxt =
2310 cm_node->tcp_cntxt.loc_seq_num;
2311 cm_node->tcp_cntxt.max_snd_wnd =
2312 loopbackremotenode->tcp_cntxt.rcv_wnd;
2313 loopbackremotenode->tcp_cntxt.max_snd_wnd =
2314 cm_node->tcp_cntxt.rcv_wnd;
2315 cm_node->tcp_cntxt.snd_wnd =
2316 loopbackremotenode->tcp_cntxt.rcv_wnd;
2317 loopbackremotenode->tcp_cntxt.snd_wnd =
2318 cm_node->tcp_cntxt.rcv_wnd;
2319 cm_node->tcp_cntxt.snd_wscale =
2320 loopbackremotenode->tcp_cntxt.rcv_wscale;
2321 loopbackremotenode->tcp_cntxt.snd_wscale =
2322 cm_node->tcp_cntxt.rcv_wscale;
2323 loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2324 create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2325 }
2326 return cm_node;
2327 }
2328
2329 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
2330 cm_node->mpa_frame_size = private_data_len;
2331
2332 memcpy(start_buff, private_data, private_data_len);
2333
2334 /* send a syn and goto syn sent state */
2335 cm_node->state = NES_CM_STATE_SYN_SENT;
2336 ret = send_syn(cm_node, 0, NULL);
2337
2338 if (ret) {
2339 /* error in sending the syn free up the cm_node struct */
2340 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2341 "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2342 cm_node->rem_addr, cm_node->rem_port, cm_node,
2343 cm_node->cm_id);
2344 rem_ref_cm_node(cm_node->cm_core, cm_node);
2345 cm_node = NULL;
2346 }
2347
2348 if (cm_node) {
2349 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2350 "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2351 cm_node->rem_addr, cm_node->rem_port, cm_node,
2352 cm_node->cm_id);
2353 }
2354
2355 return cm_node;
2356 }
2357
2358
2359 /**
2360 * mini_cm_accept - accept a connection
2361 * This function is never called
2362 */
2363 static int mini_cm_accept(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2364 {
2365 return 0;
2366 }
2367
2368
2369 /**
2370 * mini_cm_reject - reject and teardown a connection
2371 */
2372 static int mini_cm_reject(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2373 {
2374 int ret = 0;
2375 int err = 0;
2376 int passive_state;
2377 struct nes_cm_event event;
2378 struct iw_cm_id *cm_id = cm_node->cm_id;
2379 struct nes_cm_node *loopback = cm_node->loopbackpartner;
2380
2381 nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2382 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2383
2384 if (cm_node->tcp_cntxt.client)
2385 return ret;
2386 cleanup_retrans_entry(cm_node);
2387
2388 if (!loopback) {
2389 passive_state = atomic_add_return(1, &cm_node->passive_state);
2390 if (passive_state == NES_SEND_RESET_EVENT) {
2391 cm_node->state = NES_CM_STATE_CLOSED;
2392 rem_ref_cm_node(cm_core, cm_node);
2393 } else {
2394 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2395 rem_ref_cm_node(cm_core, cm_node);
2396 } else {
2397 ret = send_mpa_reject(cm_node);
2398 if (ret) {
2399 cm_node->state = NES_CM_STATE_CLOSED;
2400 err = send_reset(cm_node, NULL);
2401 if (err)
2402 WARN_ON(1);
2403 } else {
2404 cm_id->add_ref(cm_id);
2405 }
2406 }
2407 }
2408 } else {
2409 cm_node->cm_id = NULL;
2410 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2411 rem_ref_cm_node(cm_core, cm_node);
2412 rem_ref_cm_node(cm_core, loopback);
2413 } else {
2414 event.cm_node = loopback;
2415 event.cm_info.rem_addr = loopback->rem_addr;
2416 event.cm_info.loc_addr = loopback->loc_addr;
2417 event.cm_info.rem_port = loopback->rem_port;
2418 event.cm_info.loc_port = loopback->loc_port;
2419 event.cm_info.cm_id = loopback->cm_id;
2420 cm_event_mpa_reject(&event);
2421 rem_ref_cm_node(cm_core, cm_node);
2422 loopback->state = NES_CM_STATE_CLOSING;
2423
2424 cm_id = loopback->cm_id;
2425 rem_ref_cm_node(cm_core, loopback);
2426 cm_id->rem_ref(cm_id);
2427 }
2428 }
2429
2430 return ret;
2431 }
2432
2433
2434 /**
2435 * mini_cm_close
2436 */
2437 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2438 {
2439 int ret = 0;
2440
2441 if (!cm_core || !cm_node)
2442 return -EINVAL;
2443
2444 switch (cm_node->state) {
2445 case NES_CM_STATE_SYN_RCVD:
2446 case NES_CM_STATE_SYN_SENT:
2447 case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2448 case NES_CM_STATE_ESTABLISHED:
2449 case NES_CM_STATE_ACCEPTING:
2450 case NES_CM_STATE_MPAREQ_SENT:
2451 case NES_CM_STATE_MPAREQ_RCVD:
2452 cleanup_retrans_entry(cm_node);
2453 send_reset(cm_node, NULL);
2454 break;
2455 case NES_CM_STATE_CLOSE_WAIT:
2456 cm_node->state = NES_CM_STATE_LAST_ACK;
2457 send_fin(cm_node, NULL);
2458 break;
2459 case NES_CM_STATE_FIN_WAIT1:
2460 case NES_CM_STATE_FIN_WAIT2:
2461 case NES_CM_STATE_LAST_ACK:
2462 case NES_CM_STATE_TIME_WAIT:
2463 case NES_CM_STATE_CLOSING:
2464 ret = -1;
2465 break;
2466 case NES_CM_STATE_LISTENING:
2467 cleanup_retrans_entry(cm_node);
2468 send_reset(cm_node, NULL);
2469 break;
2470 case NES_CM_STATE_MPAREJ_RCVD:
2471 case NES_CM_STATE_UNKNOWN:
2472 case NES_CM_STATE_INITED:
2473 case NES_CM_STATE_CLOSED:
2474 case NES_CM_STATE_LISTENER_DESTROYED:
2475 ret = rem_ref_cm_node(cm_core, cm_node);
2476 break;
2477 case NES_CM_STATE_TSA:
2478 if (cm_node->send_entry)
2479 printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2480 "send_entry=%p\n", cm_node->send_entry);
2481 ret = rem_ref_cm_node(cm_core, cm_node);
2482 break;
2483 }
2484 return ret;
2485 }
2486
2487
2488 /**
2489 * recv_pkt - recv an ETHERNET packet, and process it through CM
2490 * node state machine
2491 */
2492 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2493 struct nes_vnic *nesvnic, struct sk_buff *skb)
2494 {
2495 struct nes_cm_node *cm_node = NULL;
2496 struct nes_cm_listener *listener = NULL;
2497 struct iphdr *iph;
2498 struct tcphdr *tcph;
2499 struct nes_cm_info nfo;
2500 int skb_handled = 1;
2501 __be32 tmp_daddr, tmp_saddr;
2502
2503 if (!skb)
2504 return 0;
2505 if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr))
2506 return 0;
2507
2508 iph = (struct iphdr *)skb->data;
2509 tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2510
2511 nfo.loc_addr = ntohl(iph->daddr);
2512 nfo.loc_port = ntohs(tcph->dest);
2513 nfo.rem_addr = ntohl(iph->saddr);
2514 nfo.rem_port = ntohs(tcph->source);
2515
2516 tmp_daddr = cpu_to_be32(iph->daddr);
2517 tmp_saddr = cpu_to_be32(iph->saddr);
2518
2519 nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2520 &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2521
2522 do {
2523 cm_node = find_node(cm_core,
2524 nfo.rem_port, nfo.rem_addr,
2525 nfo.loc_port, nfo.loc_addr);
2526
2527 if (!cm_node) {
2528 /* Only type of packet accepted are for */
2529 /* the PASSIVE open (syn only) */
2530 if ((!tcph->syn) || (tcph->ack)) {
2531 skb_handled = 0;
2532 break;
2533 }
2534 listener = find_listener(cm_core, nfo.loc_addr,
2535 nfo.loc_port,
2536 NES_CM_LISTENER_ACTIVE_STATE);
2537 if (!listener) {
2538 nfo.cm_id = NULL;
2539 nfo.conn_type = 0;
2540 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2541 skb_handled = 0;
2542 break;
2543 }
2544 nfo.cm_id = listener->cm_id;
2545 nfo.conn_type = listener->conn_type;
2546 cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2547 listener);
2548 if (!cm_node) {
2549 nes_debug(NES_DBG_CM, "Unable to allocate "
2550 "node\n");
2551 cm_packets_dropped++;
2552 atomic_dec(&listener->ref_count);
2553 dev_kfree_skb_any(skb);
2554 break;
2555 }
2556 if (!tcph->rst && !tcph->fin) {
2557 cm_node->state = NES_CM_STATE_LISTENING;
2558 } else {
2559 cm_packets_dropped++;
2560 rem_ref_cm_node(cm_core, cm_node);
2561 dev_kfree_skb_any(skb);
2562 break;
2563 }
2564 add_ref_cm_node(cm_node);
2565 } else if (cm_node->state == NES_CM_STATE_TSA) {
2566 if (cm_node->nesqp->pau_mode)
2567 nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp);
2568 else {
2569 rem_ref_cm_node(cm_core, cm_node);
2570 atomic_inc(&cm_accel_dropped_pkts);
2571 dev_kfree_skb_any(skb);
2572 }
2573 break;
2574 }
2575 skb_reset_network_header(skb);
2576 skb_set_transport_header(skb, sizeof(*tcph));
2577 skb->len = ntohs(iph->tot_len);
2578 process_packet(cm_node, skb, cm_core);
2579 rem_ref_cm_node(cm_core, cm_node);
2580 } while (0);
2581 return skb_handled;
2582 }
2583
2584
2585 /**
2586 * nes_cm_alloc_core - allocate a top level instance of a cm core
2587 */
2588 static struct nes_cm_core *nes_cm_alloc_core(void)
2589 {
2590 struct nes_cm_core *cm_core;
2591
2592 /* setup the CM core */
2593 /* alloc top level core control structure */
2594 cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2595 if (!cm_core)
2596 return NULL;
2597
2598 INIT_LIST_HEAD(&cm_core->connected_nodes);
2599 init_timer(&cm_core->tcp_timer);
2600 cm_core->tcp_timer.function = nes_cm_timer_tick;
2601
2602 cm_core->mtu = NES_CM_DEFAULT_MTU;
2603 cm_core->state = NES_CM_STATE_INITED;
2604 cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2605
2606 atomic_set(&cm_core->events_posted, 0);
2607
2608 cm_core->api = &nes_cm_api;
2609
2610 spin_lock_init(&cm_core->ht_lock);
2611 spin_lock_init(&cm_core->listen_list_lock);
2612
2613 INIT_LIST_HEAD(&cm_core->listen_list.list);
2614
2615 nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2616
2617 nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2618 cm_core->event_wq = create_singlethread_workqueue("nesewq");
2619 cm_core->post_event = nes_cm_post_event;
2620 nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2621 cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2622
2623 print_core(cm_core);
2624 return cm_core;
2625 }
2626
2627
2628 /**
2629 * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2630 */
2631 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2632 {
2633 nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2634
2635 if (!cm_core)
2636 return -EINVAL;
2637
2638 barrier();
2639
2640 if (timer_pending(&cm_core->tcp_timer))
2641 del_timer(&cm_core->tcp_timer);
2642
2643 destroy_workqueue(cm_core->event_wq);
2644 destroy_workqueue(cm_core->disconn_wq);
2645 nes_debug(NES_DBG_CM, "\n");
2646 kfree(cm_core);
2647
2648 return 0;
2649 }
2650
2651
2652 /**
2653 * mini_cm_get
2654 */
2655 static int mini_cm_get(struct nes_cm_core *cm_core)
2656 {
2657 return cm_core->state;
2658 }
2659
2660
2661 /**
2662 * mini_cm_set
2663 */
2664 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2665 {
2666 int ret = 0;
2667
2668 switch (type) {
2669 case NES_CM_SET_PKT_SIZE:
2670 cm_core->mtu = value;
2671 break;
2672 case NES_CM_SET_FREE_PKT_Q_SIZE:
2673 cm_core->free_tx_pkt_max = value;
2674 break;
2675 default:
2676 /* unknown set option */
2677 ret = -EINVAL;
2678 }
2679
2680 return ret;
2681 }
2682
2683
2684 /**
2685 * nes_cm_init_tsa_conn setup HW; MPA frames must be
2686 * successfully exchanged when this is called
2687 */
2688 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2689 {
2690 int ret = 0;
2691
2692 if (!nesqp)
2693 return -EINVAL;
2694
2695 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2696 NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2697 NES_QPCONTEXT_MISC_DROS);
2698
2699 if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2700 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2701
2702 nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2703
2704 nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2705
2706 nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2707 (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2708
2709 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2710 (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2711 NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2712
2713 nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2714 (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2715 NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2716
2717 nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2718 nesqp->nesqp_context->ts_recent = 0;
2719 nesqp->nesqp_context->ts_age = 0;
2720 nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2721 nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2722 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2723 nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2724 cm_node->tcp_cntxt.rcv_wscale);
2725 nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2726 nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2727 nesqp->nesqp_context->srtt = 0;
2728 nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2729 nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2730 nesqp->nesqp_context->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss);
2731 nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2732 nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2733 nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2734
2735 nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2736 " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2737 nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2738 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2739 cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2740 le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2741 le32_to_cpu(nesqp->nesqp_context->misc));
2742 nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2743 nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2744 nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2745
2746 nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2747 cm_node->state = NES_CM_STATE_TSA;
2748
2749 return ret;
2750 }
2751
2752
2753 /**
2754 * nes_cm_disconn
2755 */
2756 int nes_cm_disconn(struct nes_qp *nesqp)
2757 {
2758 struct disconn_work *work;
2759
2760 work = kzalloc(sizeof *work, GFP_ATOMIC);
2761 if (!work)
2762 return -ENOMEM; /* Timer will clean up */
2763
2764 nes_add_ref(&nesqp->ibqp);
2765 work->nesqp = nesqp;
2766 INIT_WORK(&work->work, nes_disconnect_worker);
2767 queue_work(g_cm_core->disconn_wq, &work->work);
2768 return 0;
2769 }
2770
2771
2772 /**
2773 * nes_disconnect_worker
2774 */
2775 static void nes_disconnect_worker(struct work_struct *work)
2776 {
2777 struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2778 struct nes_qp *nesqp = dwork->nesqp;
2779
2780 kfree(dwork);
2781 nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2782 nesqp->last_aeq, nesqp->hwqp.qp_id);
2783 nes_cm_disconn_true(nesqp);
2784 nes_rem_ref(&nesqp->ibqp);
2785 }
2786
2787
2788 /**
2789 * nes_cm_disconn_true
2790 */
2791 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2792 {
2793 unsigned long flags;
2794 int ret = 0;
2795 struct iw_cm_id *cm_id;
2796 struct iw_cm_event cm_event;
2797 struct nes_vnic *nesvnic;
2798 u16 last_ae;
2799 u8 original_hw_tcp_state;
2800 u8 original_ibqp_state;
2801 int disconn_status = 0;
2802 int issue_disconn = 0;
2803 int issue_close = 0;
2804 int issue_flush = 0;
2805 u32 flush_q = NES_CQP_FLUSH_RQ;
2806 struct ib_event ibevent;
2807
2808 if (!nesqp) {
2809 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2810 return -1;
2811 }
2812
2813 spin_lock_irqsave(&nesqp->lock, flags);
2814 cm_id = nesqp->cm_id;
2815 /* make sure we havent already closed this connection */
2816 if (!cm_id) {
2817 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2818 nesqp->hwqp.qp_id);
2819 spin_unlock_irqrestore(&nesqp->lock, flags);
2820 return -1;
2821 }
2822
2823 nesvnic = to_nesvnic(nesqp->ibqp.device);
2824 nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2825
2826 original_hw_tcp_state = nesqp->hw_tcp_state;
2827 original_ibqp_state = nesqp->ibqp_state;
2828 last_ae = nesqp->last_aeq;
2829
2830 if (nesqp->term_flags) {
2831 issue_disconn = 1;
2832 issue_close = 1;
2833 nesqp->cm_id = NULL;
2834 del_timer(&nesqp->terminate_timer);
2835 if (nesqp->flush_issued == 0) {
2836 nesqp->flush_issued = 1;
2837 issue_flush = 1;
2838 }
2839 } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2840 ((original_ibqp_state == IB_QPS_RTS) &&
2841 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2842 issue_disconn = 1;
2843 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2844 disconn_status = -ECONNRESET;
2845 }
2846
2847 if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2848 (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2849 (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2850 (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2851 issue_close = 1;
2852 nesqp->cm_id = NULL;
2853 if (nesqp->flush_issued == 0) {
2854 nesqp->flush_issued = 1;
2855 issue_flush = 1;
2856 }
2857 }
2858
2859 spin_unlock_irqrestore(&nesqp->lock, flags);
2860
2861 if ((issue_flush) && (nesqp->destroyed == 0)) {
2862 /* Flush the queue(s) */
2863 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2864 flush_q |= NES_CQP_FLUSH_SQ;
2865 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2866
2867 if (nesqp->term_flags) {
2868 ibevent.device = nesqp->ibqp.device;
2869 ibevent.event = nesqp->terminate_eventtype;
2870 ibevent.element.qp = &nesqp->ibqp;
2871 if (nesqp->ibqp.event_handler)
2872 nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2873 }
2874 }
2875
2876 if ((cm_id) && (cm_id->event_handler)) {
2877 if (issue_disconn) {
2878 atomic_inc(&cm_disconnects);
2879 cm_event.event = IW_CM_EVENT_DISCONNECT;
2880 cm_event.status = disconn_status;
2881 cm_event.local_addr = cm_id->local_addr;
2882 cm_event.remote_addr = cm_id->remote_addr;
2883 cm_event.private_data = NULL;
2884 cm_event.private_data_len = 0;
2885
2886 nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2887 " for QP%u, SQ Head = %u, SQ Tail = %u. "
2888 "cm_id = %p, refcount = %u.\n",
2889 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2890 nesqp->hwqp.sq_tail, cm_id,
2891 atomic_read(&nesqp->refcount));
2892
2893 ret = cm_id->event_handler(cm_id, &cm_event);
2894 if (ret)
2895 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2896 "returned, ret=%d\n", ret);
2897 }
2898
2899 if (issue_close) {
2900 atomic_inc(&cm_closes);
2901 nes_disconnect(nesqp, 1);
2902
2903 cm_id->provider_data = nesqp;
2904 /* Send up the close complete event */
2905 cm_event.event = IW_CM_EVENT_CLOSE;
2906 cm_event.status = 0;
2907 cm_event.provider_data = cm_id->provider_data;
2908 cm_event.local_addr = cm_id->local_addr;
2909 cm_event.remote_addr = cm_id->remote_addr;
2910 cm_event.private_data = NULL;
2911 cm_event.private_data_len = 0;
2912
2913 ret = cm_id->event_handler(cm_id, &cm_event);
2914 if (ret)
2915 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2916
2917 cm_id->rem_ref(cm_id);
2918 }
2919 }
2920
2921 return 0;
2922 }
2923
2924
2925 /**
2926 * nes_disconnect
2927 */
2928 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2929 {
2930 int ret = 0;
2931 struct nes_vnic *nesvnic;
2932 struct nes_device *nesdev;
2933 struct nes_ib_device *nesibdev;
2934
2935 nesvnic = to_nesvnic(nesqp->ibqp.device);
2936 if (!nesvnic)
2937 return -EINVAL;
2938
2939 nesdev = nesvnic->nesdev;
2940 nesibdev = nesvnic->nesibdev;
2941
2942 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2943 netdev_refcnt_read(nesvnic->netdev));
2944
2945 if (nesqp->active_conn) {
2946
2947 /* indicate this connection is NOT active */
2948 nesqp->active_conn = 0;
2949 } else {
2950 /* Need to free the Last Streaming Mode Message */
2951 if (nesqp->ietf_frame) {
2952 if (nesqp->lsmm_mr)
2953 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2954 pci_free_consistent(nesdev->pcidev,
2955 nesqp->private_data_len + nesqp->ietf_frame_size,
2956 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2957 }
2958 }
2959
2960 /* close the CM node down if it is still active */
2961 if (nesqp->cm_node) {
2962 nes_debug(NES_DBG_CM, "Call close API\n");
2963
2964 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2965 }
2966
2967 return ret;
2968 }
2969
2970
2971 /**
2972 * nes_accept
2973 */
2974 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2975 {
2976 u64 u64temp;
2977 struct ib_qp *ibqp;
2978 struct nes_qp *nesqp;
2979 struct nes_vnic *nesvnic;
2980 struct nes_device *nesdev;
2981 struct nes_cm_node *cm_node;
2982 struct nes_adapter *adapter;
2983 struct ib_qp_attr attr;
2984 struct iw_cm_event cm_event;
2985 struct nes_hw_qp_wqe *wqe;
2986 struct nes_v4_quad nes_quad;
2987 u32 crc_value;
2988 int ret;
2989 int passive_state;
2990 struct nes_ib_device *nesibdev;
2991 struct ib_mr *ibmr = NULL;
2992 struct ib_phys_buf ibphysbuf;
2993 struct nes_pd *nespd;
2994 u64 tagged_offset;
2995 u8 mpa_frame_offset = 0;
2996 struct ietf_mpa_v2 *mpa_v2_frame;
2997 u8 start_addr = 0;
2998 u8 *start_ptr = &start_addr;
2999 u8 **start_buff = &start_ptr;
3000 u16 buff_len = 0;
3001 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3002 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3003
3004 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3005 if (!ibqp)
3006 return -EINVAL;
3007
3008 /* get all our handles */
3009 nesqp = to_nesqp(ibqp);
3010 nesvnic = to_nesvnic(nesqp->ibqp.device);
3011 nesdev = nesvnic->nesdev;
3012 adapter = nesdev->nesadapter;
3013
3014 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3015 nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
3016 "%s\n", cm_node, nesvnic, nesvnic->netdev,
3017 nesvnic->netdev->name);
3018
3019 if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
3020 if (cm_node->loopbackpartner)
3021 rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
3022 rem_ref_cm_node(cm_node->cm_core, cm_node);
3023 return -EINVAL;
3024 }
3025
3026 passive_state = atomic_add_return(1, &cm_node->passive_state);
3027 if (passive_state == NES_SEND_RESET_EVENT) {
3028 rem_ref_cm_node(cm_node->cm_core, cm_node);
3029 return -ECONNRESET;
3030 }
3031
3032 /* associate the node with the QP */
3033 nesqp->cm_node = (void *)cm_node;
3034 cm_node->nesqp = nesqp;
3035
3036 nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
3037 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
3038 atomic_inc(&cm_accepts);
3039
3040 nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
3041 netdev_refcnt_read(nesvnic->netdev));
3042
3043 nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2);
3044 /* allocate the ietf frame and space for private data */
3045 nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
3046 nesqp->ietf_frame_size + conn_param->private_data_len,
3047 &nesqp->ietf_frame_pbase);
3048
3049 if (!nesqp->ietf_frame) {
3050 nes_debug(NES_DBG_CM, "Unable to allocate memory for private data\n");
3051 return -ENOMEM;
3052 }
3053 mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame;
3054
3055 if (cm_node->mpa_frame_rev == IETF_MPA_V1)
3056 mpa_frame_offset = 4;
3057
3058 memcpy(mpa_v2_frame->priv_data, conn_param->private_data,
3059 conn_param->private_data_len);
3060
3061 cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY);
3062 nesqp->private_data_len = conn_param->private_data_len;
3063
3064 /* setup our first outgoing iWarp send WQE (the IETF frame response) */
3065 wqe = &nesqp->hwqp.sq_vbase[0];
3066
3067 if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) {
3068 u64temp = (unsigned long)nesqp;
3069 nesibdev = nesvnic->nesibdev;
3070 nespd = nesqp->nespd;
3071 ibphysbuf.addr = nesqp->ietf_frame_pbase + mpa_frame_offset;
3072 ibphysbuf.size = buff_len;
3073 tagged_offset = (u64)(unsigned long)*start_buff;
3074 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
3075 &ibphysbuf, 1,
3076 IB_ACCESS_LOCAL_WRITE,
3077 &tagged_offset);
3078 if (!ibmr) {
3079 nes_debug(NES_DBG_CM, "Unable to register memory region"
3080 "for lSMM for cm_node = %p \n",
3081 cm_node);
3082 pci_free_consistent(nesdev->pcidev,
3083 nesqp->private_data_len + nesqp->ietf_frame_size,
3084 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
3085 return -ENOMEM;
3086 }
3087
3088 ibmr->pd = &nespd->ibpd;
3089 ibmr->device = nespd->ibpd.device;
3090 nesqp->lsmm_mr = ibmr;
3091
3092 u64temp |= NES_SW_CONTEXT_ALIGN >> 1;
3093 set_wqe_64bit_value(wqe->wqe_words,
3094 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
3095 u64temp);
3096 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3097 cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
3098 NES_IWARP_SQ_WQE_WRPDU);
3099 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
3100 cpu_to_le32(buff_len);
3101 set_wqe_64bit_value(wqe->wqe_words,
3102 NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
3103 (u64)(unsigned long)(*start_buff));
3104 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
3105 cpu_to_le32(buff_len);
3106 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
3107 if (nesqp->sq_kmapped) {
3108 nesqp->sq_kmapped = 0;
3109 kunmap(nesqp->page);
3110 }
3111
3112 nesqp->nesqp_context->ird_ord_sizes |=
3113 cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3114 NES_QPCONTEXT_ORDIRD_WRPDU);
3115 } else {
3116 nesqp->nesqp_context->ird_ord_sizes |=
3117 cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
3118 }
3119 nesqp->skip_lsmm = 1;
3120
3121
3122 /* Cache the cm_id in the qp */
3123 nesqp->cm_id = cm_id;
3124 cm_node->cm_id = cm_id;
3125
3126 /* nesqp->cm_node = (void *)cm_id->provider_data; */
3127 cm_id->provider_data = nesqp;
3128 nesqp->active_conn = 0;
3129
3130 if (cm_node->state == NES_CM_STATE_TSA)
3131 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
3132 cm_node);
3133
3134 nes_cm_init_tsa_conn(nesqp, cm_node);
3135
3136 nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(laddr->sin_port));
3137 nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(raddr->sin_port));
3138
3139 nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(raddr->sin_addr.s_addr));
3140
3141 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3142 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3143 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3144
3145 nesqp->nesqp_context->arp_index_vlan |=
3146 cpu_to_le32(nes_arp_table(nesdev,
3147 le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
3148 NES_ARP_RESOLVE) << 16);
3149
3150 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3151 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3152
3153 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3154
3155 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
3156 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
3157 nesqp->nesqp_context->ird_ord_sizes |=
3158 cpu_to_le32((u32)conn_param->ord);
3159
3160 memset(&nes_quad, 0, sizeof(nes_quad));
3161 nes_quad.DstIpAdrIndex =
3162 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3163 nes_quad.SrcIpadr = raddr->sin_addr.s_addr;
3164 nes_quad.TcpPorts[0] = raddr->sin_port;
3165 nes_quad.TcpPorts[1] = laddr->sin_port;
3166
3167 /* Produce hash key */
3168 crc_value = get_crc_value(&nes_quad);
3169 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3170 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
3171 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
3172
3173 nesqp->hte_index &= adapter->hte_index_mask;
3174 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3175
3176 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3177
3178 nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
3179 "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
3180 "private data length=%u.\n", nesqp->hwqp.qp_id,
3181 ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port),
3182 ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port),
3183 le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
3184 le32_to_cpu(nesqp->nesqp_context->snd_nxt),
3185 buff_len);
3186
3187 /* notify OF layer that accept event was successful */
3188 cm_id->add_ref(cm_id);
3189 nes_add_ref(&nesqp->ibqp);
3190
3191 cm_event.event = IW_CM_EVENT_ESTABLISHED;
3192 cm_event.status = 0;
3193 cm_event.provider_data = (void *)nesqp;
3194 cm_event.local_addr = cm_id->local_addr;
3195 cm_event.remote_addr = cm_id->remote_addr;
3196 cm_event.private_data = NULL;
3197 cm_event.private_data_len = 0;
3198 ret = cm_id->event_handler(cm_id, &cm_event);
3199 attr.qp_state = IB_QPS_RTS;
3200 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3201 if (cm_node->loopbackpartner) {
3202 cm_node->loopbackpartner->mpa_frame_size =
3203 nesqp->private_data_len;
3204 /* copy entire MPA frame to our cm_node's frame */
3205 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
3206 conn_param->private_data, conn_param->private_data_len);
3207 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
3208 }
3209 if (ret)
3210 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3211 "ret=%d\n", __func__, __LINE__, ret);
3212
3213 return 0;
3214 }
3215
3216
3217 /**
3218 * nes_reject
3219 */
3220 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
3221 {
3222 struct nes_cm_node *cm_node;
3223 struct nes_cm_node *loopback;
3224 struct nes_cm_core *cm_core;
3225 u8 *start_buff;
3226
3227 atomic_inc(&cm_rejects);
3228 cm_node = (struct nes_cm_node *)cm_id->provider_data;
3229 loopback = cm_node->loopbackpartner;
3230 cm_core = cm_node->cm_core;
3231 cm_node->cm_id = cm_id;
3232
3233 if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER)
3234 return -EINVAL;
3235
3236 if (loopback) {
3237 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3238 loopback->mpa_frame.priv_data_len = pdata_len;
3239 loopback->mpa_frame_size = pdata_len;
3240 } else {
3241 start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2);
3242 cm_node->mpa_frame_size = pdata_len;
3243 memcpy(start_buff, pdata, pdata_len);
3244 }
3245 return cm_core->api->reject(cm_core, cm_node);
3246 }
3247
3248
3249 /**
3250 * nes_connect
3251 * setup and launch cm connect node
3252 */
3253 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3254 {
3255 struct ib_qp *ibqp;
3256 struct nes_qp *nesqp;
3257 struct nes_vnic *nesvnic;
3258 struct nes_device *nesdev;
3259 struct nes_cm_node *cm_node;
3260 struct nes_cm_info cm_info;
3261 int apbvt_set = 0;
3262 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3263 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3264
3265 if (cm_id->remote_addr.ss_family != AF_INET)
3266 return -ENOSYS;
3267 ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3268 if (!ibqp)
3269 return -EINVAL;
3270 nesqp = to_nesqp(ibqp);
3271 if (!nesqp)
3272 return -EINVAL;
3273 nesvnic = to_nesvnic(nesqp->ibqp.device);
3274 if (!nesvnic)
3275 return -EINVAL;
3276 nesdev = nesvnic->nesdev;
3277 if (!nesdev)
3278 return -EINVAL;
3279
3280 if (!laddr->sin_port || !raddr->sin_port)
3281 return -EINVAL;
3282
3283 nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3284 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3285 ntohl(nesvnic->local_ipaddr), ntohl(raddr->sin_addr.s_addr),
3286 ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr),
3287 ntohs(laddr->sin_port));
3288
3289 atomic_inc(&cm_connects);
3290 nesqp->active_conn = 1;
3291
3292 /* cache the cm_id in the qp */
3293 nesqp->cm_id = cm_id;
3294
3295 cm_id->provider_data = nesqp;
3296
3297 nesqp->private_data_len = conn_param->private_data_len;
3298 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3299 /* space for rdma0 read msg */
3300 if (conn_param->ord == 0)
3301 nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(1);
3302
3303 nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3304 nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3305 conn_param->private_data_len);
3306
3307 if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) {
3308 nes_manage_apbvt(nesvnic, ntohs(laddr->sin_port),
3309 PCI_FUNC(nesdev->pcidev->devfn),
3310 NES_MANAGE_APBVT_ADD);
3311 apbvt_set = 1;
3312 }
3313
3314 /* set up the connection params for the node */
3315 cm_info.loc_addr = htonl(laddr->sin_addr.s_addr);
3316 cm_info.loc_port = htons(laddr->sin_port);
3317 cm_info.rem_addr = htonl(raddr->sin_addr.s_addr);
3318 cm_info.rem_port = htons(raddr->sin_port);
3319 cm_info.cm_id = cm_id;
3320 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3321
3322 cm_id->add_ref(cm_id);
3323
3324 /* create a connect CM node connection */
3325 cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3326 conn_param->private_data_len, (void *)conn_param->private_data,
3327 &cm_info);
3328 if (!cm_node) {
3329 if (apbvt_set)
3330 nes_manage_apbvt(nesvnic, ntohs(laddr->sin_port),
3331 PCI_FUNC(nesdev->pcidev->devfn),
3332 NES_MANAGE_APBVT_DEL);
3333
3334 cm_id->rem_ref(cm_id);
3335 return -ENOMEM;
3336 }
3337
3338 cm_node->apbvt_set = apbvt_set;
3339 nesqp->cm_node = cm_node;
3340 cm_node->nesqp = nesqp;
3341 nes_add_ref(&nesqp->ibqp);
3342
3343 return 0;
3344 }
3345
3346
3347 /**
3348 * nes_create_listen
3349 */
3350 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3351 {
3352 struct nes_vnic *nesvnic;
3353 struct nes_cm_listener *cm_node;
3354 struct nes_cm_info cm_info;
3355 int err;
3356 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
3357
3358 nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3359 cm_id, ntohs(laddr->sin_port));
3360
3361 if (cm_id->local_addr.ss_family != AF_INET)
3362 return -ENOSYS;
3363 nesvnic = to_nesvnic(cm_id->device);
3364 if (!nesvnic)
3365 return -EINVAL;
3366
3367 nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3368 nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3369
3370 nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3371 nesvnic->local_ipaddr, laddr->sin_addr.s_addr);
3372
3373 /* setup listen params in our api call struct */
3374 cm_info.loc_addr = nesvnic->local_ipaddr;
3375 cm_info.loc_port = laddr->sin_port;
3376 cm_info.backlog = backlog;
3377 cm_info.cm_id = cm_id;
3378
3379 cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3380
3381
3382 cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3383 if (!cm_node) {
3384 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3385 __func__, __LINE__);
3386 return -ENOMEM;
3387 }
3388
3389 cm_id->provider_data = cm_node;
3390
3391 if (!cm_node->reused_node) {
3392 err = nes_manage_apbvt(nesvnic, ntohs(laddr->sin_port),
3393 PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3394 NES_MANAGE_APBVT_ADD);
3395 if (err) {
3396 printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3397 err);
3398 g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3399 return err;
3400 }
3401 atomic_inc(&cm_listens_created);
3402 }
3403
3404 cm_id->add_ref(cm_id);
3405 cm_id->provider_data = (void *)cm_node;
3406
3407
3408 return 0;
3409 }
3410
3411
3412 /**
3413 * nes_destroy_listen
3414 */
3415 int nes_destroy_listen(struct iw_cm_id *cm_id)
3416 {
3417 if (cm_id->provider_data)
3418 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3419 else
3420 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3421
3422 cm_id->rem_ref(cm_id);
3423
3424 return 0;
3425 }
3426
3427
3428 /**
3429 * nes_cm_recv
3430 */
3431 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3432 {
3433 int rc = 0;
3434
3435 cm_packets_received++;
3436 if ((g_cm_core) && (g_cm_core->api))
3437 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3438 else
3439 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3440 " cm is not setup properly.\n");
3441
3442 return rc;
3443 }
3444
3445
3446 /**
3447 * nes_cm_start
3448 * Start and init a cm core module
3449 */
3450 int nes_cm_start(void)
3451 {
3452 nes_debug(NES_DBG_CM, "\n");
3453 /* create the primary CM core, pass this handle to subsequent core inits */
3454 g_cm_core = nes_cm_alloc_core();
3455 if (g_cm_core)
3456 return 0;
3457 else
3458 return -ENOMEM;
3459 }
3460
3461
3462 /**
3463 * nes_cm_stop
3464 * stop and dealloc all cm core instances
3465 */
3466 int nes_cm_stop(void)
3467 {
3468 g_cm_core->api->destroy_cm_core(g_cm_core);
3469 return 0;
3470 }
3471
3472
3473 /**
3474 * cm_event_connected
3475 * handle a connected event, setup QPs and HW
3476 */
3477 static void cm_event_connected(struct nes_cm_event *event)
3478 {
3479 struct nes_qp *nesqp;
3480 struct nes_vnic *nesvnic;
3481 struct nes_device *nesdev;
3482 struct nes_cm_node *cm_node;
3483 struct nes_adapter *nesadapter;
3484 struct ib_qp_attr attr;
3485 struct iw_cm_id *cm_id;
3486 struct iw_cm_event cm_event;
3487 struct nes_v4_quad nes_quad;
3488 u32 crc_value;
3489 int ret;
3490 struct sockaddr_in *laddr;
3491 struct sockaddr_in *raddr;
3492 struct sockaddr_in *cm_event_laddr;
3493
3494 /* get all our handles */
3495 cm_node = event->cm_node;
3496 cm_id = cm_node->cm_id;
3497 nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3498 nesqp = (struct nes_qp *)cm_id->provider_data;
3499 nesvnic = to_nesvnic(nesqp->ibqp.device);
3500 nesdev = nesvnic->nesdev;
3501 nesadapter = nesdev->nesadapter;
3502 laddr = (struct sockaddr_in *)&cm_id->local_addr;
3503 raddr = (struct sockaddr_in *)&cm_id->remote_addr;
3504 cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr;
3505
3506 if (nesqp->destroyed)
3507 return;
3508 atomic_inc(&cm_connecteds);
3509 nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
3510 " local port 0x%04X. jiffies = %lu.\n",
3511 nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr),
3512 ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies);
3513
3514 nes_cm_init_tsa_conn(nesqp, cm_node);
3515
3516 /* set the QP tsa context */
3517 nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(ntohs(laddr->sin_port));
3518 nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(ntohs(raddr->sin_port));
3519 nesqp->nesqp_context->ip0 = cpu_to_le32(ntohl(raddr->sin_addr.s_addr));
3520
3521 nesqp->nesqp_context->misc2 |= cpu_to_le32(
3522 (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3523 NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3524 nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3525 nes_arp_table(nesdev,
3526 le32_to_cpu(nesqp->nesqp_context->ip0),
3527 NULL, NES_ARP_RESOLVE) << 16);
3528 nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3529 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3530 nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3531 nesqp->nesqp_context->ird_ord_sizes |=
3532 cpu_to_le32((u32)1 <<
3533 NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3534
3535 /* Adjust tail for not having a LSMM */
3536 /*nesqp->hwqp.sq_tail = 1;*/
3537
3538 build_rdma0_msg(cm_node, &nesqp);
3539
3540 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3541 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3542
3543 memset(&nes_quad, 0, sizeof(nes_quad));
3544
3545 nes_quad.DstIpAdrIndex =
3546 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3547 nes_quad.SrcIpadr = raddr->sin_addr.s_addr;
3548 nes_quad.TcpPorts[0] = raddr->sin_port;
3549 nes_quad.TcpPorts[1] = laddr->sin_port;
3550
3551 /* Produce hash key */
3552 crc_value = get_crc_value(&nes_quad);
3553 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3554 nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3555 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3556
3557 nesqp->hte_index &= nesadapter->hte_index_mask;
3558 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3559
3560 nesqp->ietf_frame = &cm_node->mpa_frame;
3561 nesqp->private_data_len = (u8)cm_node->mpa_frame_size;
3562 cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3563
3564 /* notify OF layer we successfully created the requested connection */
3565 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3566 cm_event.status = 0;
3567 cm_event.provider_data = cm_id->provider_data;
3568 cm_event_laddr->sin_family = AF_INET;
3569 cm_event_laddr->sin_port = laddr->sin_port;
3570 cm_event.remote_addr = cm_id->remote_addr;
3571
3572 cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3573 cm_event.private_data_len = (u8)event->cm_node->mpa_frame_size;
3574 cm_event.ird = cm_node->ird_size;
3575 cm_event.ord = cm_node->ord_size;
3576
3577 cm_event_laddr->sin_addr.s_addr = event->cm_info.rem_addr;
3578 ret = cm_id->event_handler(cm_id, &cm_event);
3579 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3580
3581 if (ret)
3582 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3583 "ret=%d\n", __func__, __LINE__, ret);
3584 attr.qp_state = IB_QPS_RTS;
3585 nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3586
3587 nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3588 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3589
3590 return;
3591 }
3592
3593
3594 /**
3595 * cm_event_connect_error
3596 */
3597 static void cm_event_connect_error(struct nes_cm_event *event)
3598 {
3599 struct nes_qp *nesqp;
3600 struct iw_cm_id *cm_id;
3601 struct iw_cm_event cm_event;
3602 /* struct nes_cm_info cm_info; */
3603 int ret;
3604
3605 if (!event->cm_node)
3606 return;
3607
3608 cm_id = event->cm_node->cm_id;
3609 if (!cm_id)
3610 return;
3611
3612 nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3613 nesqp = cm_id->provider_data;
3614
3615 if (!nesqp)
3616 return;
3617
3618 /* notify OF layer about this connection error event */
3619 /* cm_id->rem_ref(cm_id); */
3620 nesqp->cm_id = NULL;
3621 cm_id->provider_data = NULL;
3622 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3623 cm_event.status = -ECONNRESET;
3624 cm_event.provider_data = cm_id->provider_data;
3625 cm_event.local_addr = cm_id->local_addr;
3626 cm_event.remote_addr = cm_id->remote_addr;
3627 cm_event.private_data = NULL;
3628 cm_event.private_data_len = 0;
3629
3630 #ifdef CONFIG_INFINIBAND_NES_DEBUG
3631 {
3632 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3633 &cm_event.local_addr;
3634 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3635 &cm_event.remote_addr;
3636 nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n",
3637 cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr);
3638 }
3639 #endif
3640
3641 ret = cm_id->event_handler(cm_id, &cm_event);
3642 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3643 if (ret)
3644 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3645 "ret=%d\n", __func__, __LINE__, ret);
3646 cm_id->rem_ref(cm_id);
3647
3648 rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3649 return;
3650 }
3651
3652
3653 /**
3654 * cm_event_reset
3655 */
3656 static void cm_event_reset(struct nes_cm_event *event)
3657 {
3658 struct nes_qp *nesqp;
3659 struct iw_cm_id *cm_id;
3660 struct iw_cm_event cm_event;
3661 /* struct nes_cm_info cm_info; */
3662 int ret;
3663
3664 if (!event->cm_node)
3665 return;
3666
3667 if (!event->cm_node->cm_id)
3668 return;
3669
3670 cm_id = event->cm_node->cm_id;
3671
3672 nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3673 nesqp = cm_id->provider_data;
3674 if (!nesqp)
3675 return;
3676
3677 nesqp->cm_id = NULL;
3678 /* cm_id->provider_data = NULL; */
3679 cm_event.event = IW_CM_EVENT_DISCONNECT;
3680 cm_event.status = -ECONNRESET;
3681 cm_event.provider_data = cm_id->provider_data;
3682 cm_event.local_addr = cm_id->local_addr;
3683 cm_event.remote_addr = cm_id->remote_addr;
3684 cm_event.private_data = NULL;
3685 cm_event.private_data_len = 0;
3686
3687 cm_id->add_ref(cm_id);
3688 ret = cm_id->event_handler(cm_id, &cm_event);
3689 atomic_inc(&cm_closes);
3690 cm_event.event = IW_CM_EVENT_CLOSE;
3691 cm_event.status = 0;
3692 cm_event.provider_data = cm_id->provider_data;
3693 cm_event.local_addr = cm_id->local_addr;
3694 cm_event.remote_addr = cm_id->remote_addr;
3695 cm_event.private_data = NULL;
3696 cm_event.private_data_len = 0;
3697 nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3698 ret = cm_id->event_handler(cm_id, &cm_event);
3699
3700 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3701
3702
3703 /* notify OF layer about this connection error event */
3704 cm_id->rem_ref(cm_id);
3705
3706 return;
3707 }
3708
3709
3710 /**
3711 * cm_event_mpa_req
3712 */
3713 static void cm_event_mpa_req(struct nes_cm_event *event)
3714 {
3715 struct iw_cm_id *cm_id;
3716 struct iw_cm_event cm_event;
3717 int ret;
3718 struct nes_cm_node *cm_node;
3719 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3720 &cm_event.local_addr;
3721 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3722 &cm_event.remote_addr;
3723
3724 cm_node = event->cm_node;
3725 if (!cm_node)
3726 return;
3727 cm_id = cm_node->cm_id;
3728
3729 atomic_inc(&cm_connect_reqs);
3730 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3731 cm_node, cm_id, jiffies);
3732
3733 cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3734 cm_event.status = 0;
3735 cm_event.provider_data = (void *)cm_node;
3736
3737 cm_event_laddr->sin_family = AF_INET;
3738 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
3739 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3740
3741 cm_event_raddr->sin_family = AF_INET;
3742 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
3743 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3744 cm_event.private_data = cm_node->mpa_frame_buf;
3745 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3746 cm_event.ird = cm_node->ird_size;
3747 cm_event.ord = cm_node->ord_size;
3748
3749 ret = cm_id->event_handler(cm_id, &cm_event);
3750 if (ret)
3751 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3752 __func__, __LINE__, ret);
3753 return;
3754 }
3755
3756
3757 static void cm_event_mpa_reject(struct nes_cm_event *event)
3758 {
3759 struct iw_cm_id *cm_id;
3760 struct iw_cm_event cm_event;
3761 struct nes_cm_node *cm_node;
3762 int ret;
3763 struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *)
3764 &cm_event.local_addr;
3765 struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *)
3766 &cm_event.remote_addr;
3767
3768 cm_node = event->cm_node;
3769 if (!cm_node)
3770 return;
3771 cm_id = cm_node->cm_id;
3772
3773 atomic_inc(&cm_connect_reqs);
3774 nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3775 cm_node, cm_id, jiffies);
3776
3777 cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3778 cm_event.status = -ECONNREFUSED;
3779 cm_event.provider_data = cm_id->provider_data;
3780
3781 cm_event_laddr->sin_family = AF_INET;
3782 cm_event_laddr->sin_port = htons(event->cm_info.loc_port);
3783 cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3784
3785 cm_event_raddr->sin_family = AF_INET;
3786 cm_event_raddr->sin_port = htons(event->cm_info.rem_port);
3787 cm_event_raddr->sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3788
3789 cm_event.private_data = cm_node->mpa_frame_buf;
3790 cm_event.private_data_len = (u8)cm_node->mpa_frame_size;
3791
3792 nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3793 "remove_addr=%08x\n",
3794 cm_event_laddr->sin_addr.s_addr,
3795 cm_event_raddr->sin_addr.s_addr);
3796
3797 ret = cm_id->event_handler(cm_id, &cm_event);
3798 if (ret)
3799 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3800 __func__, __LINE__, ret);
3801
3802 return;
3803 }
3804
3805
3806 static void nes_cm_event_handler(struct work_struct *);
3807
3808 /**
3809 * nes_cm_post_event
3810 * post an event to the cm event handler
3811 */
3812 static int nes_cm_post_event(struct nes_cm_event *event)
3813 {
3814 atomic_inc(&event->cm_node->cm_core->events_posted);
3815 add_ref_cm_node(event->cm_node);
3816 event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3817 INIT_WORK(&event->event_work, nes_cm_event_handler);
3818 nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3819 event->cm_node, event);
3820
3821 queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3822
3823 nes_debug(NES_DBG_CM, "Exit\n");
3824 return 0;
3825 }
3826
3827
3828 /**
3829 * nes_cm_event_handler
3830 * worker function to handle cm events
3831 * will free instance of nes_cm_event
3832 */
3833 static void nes_cm_event_handler(struct work_struct *work)
3834 {
3835 struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3836 event_work);
3837 struct nes_cm_core *cm_core;
3838
3839 if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3840 return;
3841
3842 cm_core = event->cm_node->cm_core;
3843 nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3844 event, event->type, atomic_read(&cm_core->events_posted));
3845
3846 switch (event->type) {
3847 case NES_CM_EVENT_MPA_REQ:
3848 cm_event_mpa_req(event);
3849 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3850 event->cm_node);
3851 break;
3852 case NES_CM_EVENT_RESET:
3853 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3854 event->cm_node);
3855 cm_event_reset(event);
3856 break;
3857 case NES_CM_EVENT_CONNECTED:
3858 if ((!event->cm_node->cm_id) ||
3859 (event->cm_node->state != NES_CM_STATE_TSA))
3860 break;
3861 cm_event_connected(event);
3862 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3863 break;
3864 case NES_CM_EVENT_MPA_REJECT:
3865 if ((!event->cm_node->cm_id) ||
3866 (event->cm_node->state == NES_CM_STATE_TSA))
3867 break;
3868 cm_event_mpa_reject(event);
3869 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3870 break;
3871
3872 case NES_CM_EVENT_ABORTED:
3873 if ((!event->cm_node->cm_id) ||
3874 (event->cm_node->state == NES_CM_STATE_TSA))
3875 break;
3876 cm_event_connect_error(event);
3877 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3878 break;
3879 case NES_CM_EVENT_DROPPED_PKT:
3880 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3881 break;
3882 default:
3883 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3884 break;
3885 }
3886
3887 atomic_dec(&cm_core->events_posted);
3888 event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3889 rem_ref_cm_node(cm_core, event->cm_node);
3890 kfree(event);
3891
3892 return;
3893 }
Linux with added FPC-III support