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b038ced7 SW |
1 | /* |
2 | * Copyright (c) 2006 Chelsio, Inc. All rights reserved. | |
b038ced7 SW |
3 | * |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | #include <linux/module.h> | |
33 | #include <linux/list.h> | |
34 | #include <linux/workqueue.h> | |
35 | #include <linux/skbuff.h> | |
36 | #include <linux/timer.h> | |
37 | #include <linux/notifier.h> | |
8704e9a8 | 38 | #include <linux/inetdevice.h> |
b038ced7 SW |
39 | |
40 | #include <net/neighbour.h> | |
41 | #include <net/netevent.h> | |
42 | #include <net/route.h> | |
43 | ||
44 | #include "tcb.h" | |
45 | #include "cxgb3_offload.h" | |
46 | #include "iwch.h" | |
47 | #include "iwch_provider.h" | |
48 | #include "iwch_cm.h" | |
49 | ||
50 | static char *states[] = { | |
51 | "idle", | |
52 | "listen", | |
53 | "connecting", | |
54 | "mpa_wait_req", | |
55 | "mpa_req_sent", | |
56 | "mpa_req_rcvd", | |
57 | "mpa_rep_sent", | |
58 | "fpdu_mode", | |
59 | "aborting", | |
60 | "closing", | |
61 | "moribund", | |
62 | "dead", | |
63 | NULL, | |
64 | }; | |
65 | ||
f8b0dfd1 SW |
66 | int peer2peer = 0; |
67 | module_param(peer2peer, int, 0644); | |
68 | MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)"); | |
69 | ||
77a8d574 | 70 | static int ep_timeout_secs = 60; |
e54664c0 | 71 | module_param(ep_timeout_secs, int, 0644); |
b038ced7 | 72 | MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout " |
77a8d574 | 73 | "in seconds (default=60)"); |
b038ced7 SW |
74 | |
75 | static int mpa_rev = 1; | |
e54664c0 | 76 | module_param(mpa_rev, int, 0644); |
b038ced7 SW |
77 | MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, " |
78 | "1 is spec compliant. (default=1)"); | |
79 | ||
80 | static int markers_enabled = 0; | |
e54664c0 | 81 | module_param(markers_enabled, int, 0644); |
b038ced7 SW |
82 | MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)"); |
83 | ||
84 | static int crc_enabled = 1; | |
e54664c0 | 85 | module_param(crc_enabled, int, 0644); |
b038ced7 SW |
86 | MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)"); |
87 | ||
88 | static int rcv_win = 256 * 1024; | |
e54664c0 | 89 | module_param(rcv_win, int, 0644); |
b038ced7 SW |
90 | MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256)"); |
91 | ||
92 | static int snd_win = 32 * 1024; | |
e54664c0 | 93 | module_param(snd_win, int, 0644); |
b038ced7 SW |
94 | MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)"); |
95 | ||
96 | static unsigned int nocong = 0; | |
e54664c0 | 97 | module_param(nocong, uint, 0644); |
b038ced7 SW |
98 | MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)"); |
99 | ||
100 | static unsigned int cong_flavor = 1; | |
e54664c0 | 101 | module_param(cong_flavor, uint, 0644); |
b038ced7 SW |
102 | MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)"); |
103 | ||
104 | static void process_work(struct work_struct *work); | |
105 | static struct workqueue_struct *workq; | |
106 | static DECLARE_WORK(skb_work, process_work); | |
107 | ||
108 | static struct sk_buff_head rxq; | |
109 | static cxgb3_cpl_handler_func work_handlers[NUM_CPL_CMDS]; | |
110 | ||
111 | static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp); | |
112 | static void ep_timeout(unsigned long arg); | |
113 | static void connect_reply_upcall(struct iwch_ep *ep, int status); | |
114 | ||
115 | static void start_ep_timer(struct iwch_ep *ep) | |
116 | { | |
33718363 | 117 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 | 118 | if (timer_pending(&ep->timer)) { |
33718363 | 119 | PDBG("%s stopped / restarted timer ep %p\n", __func__, ep); |
b038ced7 SW |
120 | del_timer_sync(&ep->timer); |
121 | } else | |
122 | get_ep(&ep->com); | |
123 | ep->timer.expires = jiffies + ep_timeout_secs * HZ; | |
124 | ep->timer.data = (unsigned long)ep; | |
125 | ep->timer.function = ep_timeout; | |
126 | add_timer(&ep->timer); | |
127 | } | |
128 | ||
129 | static void stop_ep_timer(struct iwch_ep *ep) | |
130 | { | |
33718363 | 131 | PDBG("%s ep %p\n", __func__, ep); |
989a1780 SW |
132 | if (!timer_pending(&ep->timer)) { |
133 | printk(KERN_ERR "%s timer stopped when its not running! ep %p state %u\n", | |
134 | __func__, ep, ep->com.state); | |
135 | WARN_ON(1); | |
136 | return; | |
137 | } | |
b038ced7 SW |
138 | del_timer_sync(&ep->timer); |
139 | put_ep(&ep->com); | |
140 | } | |
141 | ||
04b5d028 SW |
142 | int iwch_l2t_send(struct t3cdev *tdev, struct sk_buff *skb, struct l2t_entry *l2e) |
143 | { | |
144 | int error = 0; | |
145 | struct cxio_rdev *rdev; | |
146 | ||
147 | rdev = (struct cxio_rdev *)tdev->ulp; | |
148 | if (cxio_fatal_error(rdev)) { | |
149 | kfree_skb(skb); | |
150 | return -EIO; | |
151 | } | |
152 | error = l2t_send(tdev, skb, l2e); | |
153 | if (error) | |
154 | kfree_skb(skb); | |
155 | return error; | |
156 | } | |
157 | ||
158 | int iwch_cxgb3_ofld_send(struct t3cdev *tdev, struct sk_buff *skb) | |
159 | { | |
160 | int error = 0; | |
161 | struct cxio_rdev *rdev; | |
162 | ||
163 | rdev = (struct cxio_rdev *)tdev->ulp; | |
164 | if (cxio_fatal_error(rdev)) { | |
165 | kfree_skb(skb); | |
166 | return -EIO; | |
167 | } | |
168 | error = cxgb3_ofld_send(tdev, skb); | |
169 | if (error) | |
170 | kfree_skb(skb); | |
171 | return error; | |
172 | } | |
173 | ||
b038ced7 SW |
174 | static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb) |
175 | { | |
176 | struct cpl_tid_release *req; | |
177 | ||
178 | skb = get_skb(skb, sizeof *req, GFP_KERNEL); | |
179 | if (!skb) | |
180 | return; | |
181 | req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req)); | |
182 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
183 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid)); | |
184 | skb->priority = CPL_PRIORITY_SETUP; | |
04b5d028 | 185 | iwch_cxgb3_ofld_send(tdev, skb); |
b038ced7 SW |
186 | return; |
187 | } | |
188 | ||
189 | int iwch_quiesce_tid(struct iwch_ep *ep) | |
190 | { | |
191 | struct cpl_set_tcb_field *req; | |
192 | struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
193 | ||
194 | if (!skb) | |
195 | return -ENOMEM; | |
196 | req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); | |
197 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
198 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
199 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); | |
200 | req->reply = 0; | |
201 | req->cpu_idx = 0; | |
202 | req->word = htons(W_TCB_RX_QUIESCE); | |
203 | req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); | |
204 | req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE); | |
205 | ||
206 | skb->priority = CPL_PRIORITY_DATA; | |
04b5d028 | 207 | return iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
208 | } |
209 | ||
210 | int iwch_resume_tid(struct iwch_ep *ep) | |
211 | { | |
212 | struct cpl_set_tcb_field *req; | |
213 | struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
214 | ||
215 | if (!skb) | |
216 | return -ENOMEM; | |
217 | req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); | |
218 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
219 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
220 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); | |
221 | req->reply = 0; | |
222 | req->cpu_idx = 0; | |
223 | req->word = htons(W_TCB_RX_QUIESCE); | |
224 | req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); | |
225 | req->val = 0; | |
226 | ||
227 | skb->priority = CPL_PRIORITY_DATA; | |
04b5d028 | 228 | return iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
229 | } |
230 | ||
231 | static void set_emss(struct iwch_ep *ep, u16 opt) | |
232 | { | |
33718363 | 233 | PDBG("%s ep %p opt %u\n", __func__, ep, opt); |
b038ced7 SW |
234 | ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40; |
235 | if (G_TCPOPT_TSTAMP(opt)) | |
236 | ep->emss -= 12; | |
237 | if (ep->emss < 128) | |
238 | ep->emss = 128; | |
239 | PDBG("emss=%d\n", ep->emss); | |
240 | } | |
241 | ||
242 | static enum iwch_ep_state state_read(struct iwch_ep_common *epc) | |
243 | { | |
244 | unsigned long flags; | |
245 | enum iwch_ep_state state; | |
246 | ||
247 | spin_lock_irqsave(&epc->lock, flags); | |
248 | state = epc->state; | |
249 | spin_unlock_irqrestore(&epc->lock, flags); | |
250 | return state; | |
251 | } | |
252 | ||
2b540355 | 253 | static void __state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) |
b038ced7 SW |
254 | { |
255 | epc->state = new; | |
256 | } | |
257 | ||
258 | static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) | |
259 | { | |
260 | unsigned long flags; | |
261 | ||
262 | spin_lock_irqsave(&epc->lock, flags); | |
33718363 | 263 | PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]); |
b038ced7 SW |
264 | __state_set(epc, new); |
265 | spin_unlock_irqrestore(&epc->lock, flags); | |
266 | return; | |
267 | } | |
268 | ||
269 | static void *alloc_ep(int size, gfp_t gfp) | |
270 | { | |
271 | struct iwch_ep_common *epc; | |
272 | ||
dd00cc48 | 273 | epc = kzalloc(size, gfp); |
b038ced7 | 274 | if (epc) { |
b038ced7 SW |
275 | kref_init(&epc->kref); |
276 | spin_lock_init(&epc->lock); | |
277 | init_waitqueue_head(&epc->waitq); | |
278 | } | |
33718363 | 279 | PDBG("%s alloc ep %p\n", __func__, epc); |
b038ced7 SW |
280 | return epc; |
281 | } | |
282 | ||
283 | void __free_ep(struct kref *kref) | |
284 | { | |
874d8df5 SW |
285 | struct iwch_ep *ep; |
286 | ep = container_of(container_of(kref, struct iwch_ep_common, kref), | |
287 | struct iwch_ep, com); | |
288 | PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]); | |
289 | if (ep->com.flags & RELEASE_RESOURCES) { | |
290 | cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid); | |
291 | dst_release(ep->dst); | |
292 | l2t_release(L2DATA(ep->com.tdev), ep->l2t); | |
293 | } | |
294 | kfree(ep); | |
b038ced7 SW |
295 | } |
296 | ||
297 | static void release_ep_resources(struct iwch_ep *ep) | |
298 | { | |
33718363 | 299 | PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
874d8df5 | 300 | ep->com.flags |= RELEASE_RESOURCES; |
b038ced7 SW |
301 | put_ep(&ep->com); |
302 | } | |
303 | ||
304 | static void process_work(struct work_struct *work) | |
305 | { | |
306 | struct sk_buff *skb = NULL; | |
307 | void *ep; | |
308 | struct t3cdev *tdev; | |
309 | int ret; | |
310 | ||
311 | while ((skb = skb_dequeue(&rxq))) { | |
312 | ep = *((void **) (skb->cb)); | |
313 | tdev = *((struct t3cdev **) (skb->cb + sizeof(void *))); | |
314 | ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep); | |
315 | if (ret & CPL_RET_BUF_DONE) | |
316 | kfree_skb(skb); | |
317 | ||
318 | /* | |
319 | * ep was referenced in sched(), and is freed here. | |
320 | */ | |
321 | put_ep((struct iwch_ep_common *)ep); | |
322 | } | |
323 | } | |
324 | ||
325 | static int status2errno(int status) | |
326 | { | |
327 | switch (status) { | |
328 | case CPL_ERR_NONE: | |
329 | return 0; | |
330 | case CPL_ERR_CONN_RESET: | |
331 | return -ECONNRESET; | |
332 | case CPL_ERR_ARP_MISS: | |
333 | return -EHOSTUNREACH; | |
334 | case CPL_ERR_CONN_TIMEDOUT: | |
335 | return -ETIMEDOUT; | |
336 | case CPL_ERR_TCAM_FULL: | |
337 | return -ENOMEM; | |
338 | case CPL_ERR_CONN_EXIST: | |
339 | return -EADDRINUSE; | |
340 | default: | |
341 | return -EIO; | |
342 | } | |
343 | } | |
344 | ||
345 | /* | |
346 | * Try and reuse skbs already allocated... | |
347 | */ | |
348 | static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp) | |
349 | { | |
1f6a849b | 350 | if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) { |
b038ced7 SW |
351 | skb_trim(skb, 0); |
352 | skb_get(skb); | |
353 | } else { | |
354 | skb = alloc_skb(len, gfp); | |
355 | } | |
356 | return skb; | |
357 | } | |
358 | ||
359 | static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip, | |
360 | __be32 peer_ip, __be16 local_port, | |
361 | __be16 peer_port, u8 tos) | |
362 | { | |
363 | struct rtable *rt; | |
364 | struct flowi fl = { | |
365 | .oif = 0, | |
366 | .nl_u = { | |
367 | .ip4_u = { | |
368 | .daddr = peer_ip, | |
369 | .saddr = local_ip, | |
370 | .tos = tos} | |
371 | }, | |
372 | .proto = IPPROTO_TCP, | |
373 | .uli_u = { | |
374 | .ports = { | |
375 | .sport = local_port, | |
376 | .dport = peer_port} | |
377 | } | |
378 | }; | |
379 | ||
f1b050bf | 380 | if (ip_route_output_flow(&init_net, &rt, &fl, NULL, 0)) |
b038ced7 SW |
381 | return NULL; |
382 | return rt; | |
383 | } | |
384 | ||
385 | static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu) | |
386 | { | |
387 | int i = 0; | |
388 | ||
389 | while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu) | |
390 | ++i; | |
391 | return i; | |
392 | } | |
393 | ||
394 | static void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb) | |
395 | { | |
33718363 | 396 | PDBG("%s t3cdev %p\n", __func__, dev); |
b038ced7 SW |
397 | kfree_skb(skb); |
398 | } | |
399 | ||
400 | /* | |
401 | * Handle an ARP failure for an active open. | |
402 | */ | |
403 | static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb) | |
404 | { | |
405 | printk(KERN_ERR MOD "ARP failure duing connect\n"); | |
406 | kfree_skb(skb); | |
407 | } | |
408 | ||
409 | /* | |
410 | * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant | |
411 | * and send it along. | |
412 | */ | |
413 | static void abort_arp_failure(struct t3cdev *dev, struct sk_buff *skb) | |
414 | { | |
415 | struct cpl_abort_req *req = cplhdr(skb); | |
416 | ||
33718363 | 417 | PDBG("%s t3cdev %p\n", __func__, dev); |
b038ced7 | 418 | req->cmd = CPL_ABORT_NO_RST; |
04b5d028 | 419 | iwch_cxgb3_ofld_send(dev, skb); |
b038ced7 SW |
420 | } |
421 | ||
422 | static int send_halfclose(struct iwch_ep *ep, gfp_t gfp) | |
423 | { | |
424 | struct cpl_close_con_req *req; | |
425 | struct sk_buff *skb; | |
426 | ||
33718363 | 427 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
428 | skb = get_skb(NULL, sizeof(*req), gfp); |
429 | if (!skb) { | |
33718363 | 430 | printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); |
b038ced7 SW |
431 | return -ENOMEM; |
432 | } | |
433 | skb->priority = CPL_PRIORITY_DATA; | |
434 | set_arp_failure_handler(skb, arp_failure_discard); | |
435 | req = (struct cpl_close_con_req *) skb_put(skb, sizeof(*req)); | |
436 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); | |
437 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
438 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid)); | |
04b5d028 | 439 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
440 | } |
441 | ||
442 | static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) | |
443 | { | |
444 | struct cpl_abort_req *req; | |
445 | ||
33718363 | 446 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
447 | skb = get_skb(skb, sizeof(*req), gfp); |
448 | if (!skb) { | |
449 | printk(KERN_ERR MOD "%s - failed to alloc skb.\n", | |
33718363 | 450 | __func__); |
b038ced7 SW |
451 | return -ENOMEM; |
452 | } | |
453 | skb->priority = CPL_PRIORITY_DATA; | |
454 | set_arp_failure_handler(skb, abort_arp_failure); | |
455 | req = (struct cpl_abort_req *) skb_put(skb, sizeof(*req)); | |
456 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); | |
457 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
458 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid)); | |
459 | req->cmd = CPL_ABORT_SEND_RST; | |
04b5d028 | 460 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
461 | } |
462 | ||
463 | static int send_connect(struct iwch_ep *ep) | |
464 | { | |
465 | struct cpl_act_open_req *req; | |
466 | struct sk_buff *skb; | |
467 | u32 opt0h, opt0l, opt2; | |
468 | unsigned int mtu_idx; | |
469 | int wscale; | |
470 | ||
33718363 | 471 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
472 | |
473 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
474 | if (!skb) { | |
475 | printk(KERN_ERR MOD "%s - failed to alloc skb.\n", | |
33718363 | 476 | __func__); |
b038ced7 SW |
477 | return -ENOMEM; |
478 | } | |
479 | mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); | |
480 | wscale = compute_wscale(rcv_win); | |
481 | opt0h = V_NAGLE(0) | | |
482 | V_NO_CONG(nocong) | | |
483 | V_KEEP_ALIVE(1) | | |
484 | F_TCAM_BYPASS | | |
485 | V_WND_SCALE(wscale) | | |
486 | V_MSS_IDX(mtu_idx) | | |
487 | V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); | |
488 | opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); | |
489 | opt2 = V_FLAVORS_VALID(1) | V_CONG_CONTROL_FLAVOR(cong_flavor); | |
490 | skb->priority = CPL_PRIORITY_SETUP; | |
491 | set_arp_failure_handler(skb, act_open_req_arp_failure); | |
492 | ||
493 | req = (struct cpl_act_open_req *) skb_put(skb, sizeof(*req)); | |
494 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
495 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ep->atid)); | |
496 | req->local_port = ep->com.local_addr.sin_port; | |
497 | req->peer_port = ep->com.remote_addr.sin_port; | |
498 | req->local_ip = ep->com.local_addr.sin_addr.s_addr; | |
499 | req->peer_ip = ep->com.remote_addr.sin_addr.s_addr; | |
500 | req->opt0h = htonl(opt0h); | |
501 | req->opt0l = htonl(opt0l); | |
502 | req->params = 0; | |
503 | req->opt2 = htonl(opt2); | |
04b5d028 | 504 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
505 | } |
506 | ||
507 | static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb) | |
508 | { | |
509 | int mpalen; | |
510 | struct tx_data_wr *req; | |
511 | struct mpa_message *mpa; | |
512 | int len; | |
513 | ||
33718363 | 514 | PDBG("%s ep %p pd_len %d\n", __func__, ep, ep->plen); |
b038ced7 SW |
515 | |
516 | BUG_ON(skb_cloned(skb)); | |
517 | ||
518 | mpalen = sizeof(*mpa) + ep->plen; | |
4305b541 | 519 | if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) { |
b038ced7 SW |
520 | kfree_skb(skb); |
521 | skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL); | |
522 | if (!skb) { | |
523 | connect_reply_upcall(ep, -ENOMEM); | |
524 | return; | |
525 | } | |
526 | } | |
527 | skb_trim(skb, 0); | |
528 | skb_reserve(skb, sizeof(*req)); | |
529 | skb_put(skb, mpalen); | |
530 | skb->priority = CPL_PRIORITY_DATA; | |
531 | mpa = (struct mpa_message *) skb->data; | |
532 | memset(mpa, 0, sizeof(*mpa)); | |
533 | memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)); | |
534 | mpa->flags = (crc_enabled ? MPA_CRC : 0) | | |
535 | (markers_enabled ? MPA_MARKERS : 0); | |
536 | mpa->private_data_size = htons(ep->plen); | |
537 | mpa->revision = mpa_rev; | |
538 | ||
539 | if (ep->plen) | |
540 | memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen); | |
541 | ||
542 | /* | |
543 | * Reference the mpa skb. This ensures the data area | |
544 | * will remain in memory until the hw acks the tx. | |
545 | * Function tx_ack() will deref it. | |
546 | */ | |
547 | skb_get(skb); | |
548 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 549 | skb_reset_transport_header(skb); |
b038ced7 SW |
550 | len = skb->len; |
551 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); | |
f8b0dfd1 | 552 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); |
b038ced7 SW |
553 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
554 | req->len = htonl(len); | |
555 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
556 | V_TX_SNDBUF(snd_win>>15)); | |
de3d3530 | 557 | req->flags = htonl(F_TX_INIT); |
b038ced7 SW |
558 | req->sndseq = htonl(ep->snd_seq); |
559 | BUG_ON(ep->mpa_skb); | |
560 | ep->mpa_skb = skb; | |
04b5d028 | 561 | iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
562 | start_ep_timer(ep); |
563 | state_set(&ep->com, MPA_REQ_SENT); | |
564 | return; | |
565 | } | |
566 | ||
567 | static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen) | |
568 | { | |
569 | int mpalen; | |
570 | struct tx_data_wr *req; | |
571 | struct mpa_message *mpa; | |
572 | struct sk_buff *skb; | |
573 | ||
33718363 | 574 | PDBG("%s ep %p plen %d\n", __func__, ep, plen); |
b038ced7 SW |
575 | |
576 | mpalen = sizeof(*mpa) + plen; | |
577 | ||
578 | skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); | |
579 | if (!skb) { | |
33718363 | 580 | printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); |
b038ced7 SW |
581 | return -ENOMEM; |
582 | } | |
583 | skb_reserve(skb, sizeof(*req)); | |
584 | mpa = (struct mpa_message *) skb_put(skb, mpalen); | |
585 | memset(mpa, 0, sizeof(*mpa)); | |
586 | memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); | |
587 | mpa->flags = MPA_REJECT; | |
588 | mpa->revision = mpa_rev; | |
589 | mpa->private_data_size = htons(plen); | |
590 | if (plen) | |
591 | memcpy(mpa->private_data, pdata, plen); | |
592 | ||
593 | /* | |
594 | * Reference the mpa skb again. This ensures the data area | |
595 | * will remain in memory until the hw acks the tx. | |
596 | * Function tx_ack() will deref it. | |
597 | */ | |
598 | skb_get(skb); | |
599 | skb->priority = CPL_PRIORITY_DATA; | |
600 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 601 | skb_reset_transport_header(skb); |
b038ced7 | 602 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); |
f8b0dfd1 | 603 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); |
b038ced7 SW |
604 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
605 | req->len = htonl(mpalen); | |
606 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
607 | V_TX_SNDBUF(snd_win>>15)); | |
de3d3530 | 608 | req->flags = htonl(F_TX_INIT); |
b038ced7 SW |
609 | req->sndseq = htonl(ep->snd_seq); |
610 | BUG_ON(ep->mpa_skb); | |
611 | ep->mpa_skb = skb; | |
04b5d028 | 612 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
613 | } |
614 | ||
615 | static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen) | |
616 | { | |
617 | int mpalen; | |
618 | struct tx_data_wr *req; | |
619 | struct mpa_message *mpa; | |
620 | int len; | |
621 | struct sk_buff *skb; | |
622 | ||
33718363 | 623 | PDBG("%s ep %p plen %d\n", __func__, ep, plen); |
b038ced7 SW |
624 | |
625 | mpalen = sizeof(*mpa) + plen; | |
626 | ||
627 | skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); | |
628 | if (!skb) { | |
33718363 | 629 | printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); |
b038ced7 SW |
630 | return -ENOMEM; |
631 | } | |
632 | skb->priority = CPL_PRIORITY_DATA; | |
633 | skb_reserve(skb, sizeof(*req)); | |
634 | mpa = (struct mpa_message *) skb_put(skb, mpalen); | |
635 | memset(mpa, 0, sizeof(*mpa)); | |
636 | memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); | |
637 | mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) | | |
638 | (markers_enabled ? MPA_MARKERS : 0); | |
639 | mpa->revision = mpa_rev; | |
640 | mpa->private_data_size = htons(plen); | |
641 | if (plen) | |
642 | memcpy(mpa->private_data, pdata, plen); | |
643 | ||
644 | /* | |
645 | * Reference the mpa skb. This ensures the data area | |
646 | * will remain in memory until the hw acks the tx. | |
647 | * Function tx_ack() will deref it. | |
648 | */ | |
649 | skb_get(skb); | |
650 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 651 | skb_reset_transport_header(skb); |
b038ced7 SW |
652 | len = skb->len; |
653 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); | |
f8b0dfd1 | 654 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); |
b038ced7 SW |
655 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
656 | req->len = htonl(len); | |
657 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
658 | V_TX_SNDBUF(snd_win>>15)); | |
de3d3530 | 659 | req->flags = htonl(F_TX_INIT); |
b038ced7 SW |
660 | req->sndseq = htonl(ep->snd_seq); |
661 | ep->mpa_skb = skb; | |
662 | state_set(&ep->com, MPA_REP_SENT); | |
04b5d028 | 663 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
664 | } |
665 | ||
666 | static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
667 | { | |
668 | struct iwch_ep *ep = ctx; | |
669 | struct cpl_act_establish *req = cplhdr(skb); | |
670 | unsigned int tid = GET_TID(req); | |
671 | ||
33718363 | 672 | PDBG("%s ep %p tid %d\n", __func__, ep, tid); |
b038ced7 SW |
673 | |
674 | dst_confirm(ep->dst); | |
675 | ||
676 | /* setup the hwtid for this connection */ | |
677 | ep->hwtid = tid; | |
678 | cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid); | |
679 | ||
680 | ep->snd_seq = ntohl(req->snd_isn); | |
de3d3530 | 681 | ep->rcv_seq = ntohl(req->rcv_isn); |
b038ced7 SW |
682 | |
683 | set_emss(ep, ntohs(req->tcp_opt)); | |
684 | ||
685 | /* dealloc the atid */ | |
686 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
687 | ||
688 | /* start MPA negotiation */ | |
689 | send_mpa_req(ep, skb); | |
690 | ||
691 | return 0; | |
692 | } | |
693 | ||
694 | static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) | |
695 | { | |
696 | PDBG("%s ep %p\n", __FILE__, ep); | |
697 | state_set(&ep->com, ABORTING); | |
698 | send_abort(ep, skb, gfp); | |
699 | } | |
700 | ||
701 | static void close_complete_upcall(struct iwch_ep *ep) | |
702 | { | |
703 | struct iw_cm_event event; | |
704 | ||
33718363 | 705 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
706 | memset(&event, 0, sizeof(event)); |
707 | event.event = IW_CM_EVENT_CLOSE; | |
708 | if (ep->com.cm_id) { | |
709 | PDBG("close complete delivered ep %p cm_id %p tid %d\n", | |
710 | ep, ep->com.cm_id, ep->hwtid); | |
711 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
712 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
713 | ep->com.cm_id = NULL; | |
714 | ep->com.qp = NULL; | |
715 | } | |
716 | } | |
717 | ||
718 | static void peer_close_upcall(struct iwch_ep *ep) | |
719 | { | |
720 | struct iw_cm_event event; | |
721 | ||
33718363 | 722 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
723 | memset(&event, 0, sizeof(event)); |
724 | event.event = IW_CM_EVENT_DISCONNECT; | |
725 | if (ep->com.cm_id) { | |
726 | PDBG("peer close delivered ep %p cm_id %p tid %d\n", | |
727 | ep, ep->com.cm_id, ep->hwtid); | |
728 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
729 | } | |
730 | } | |
731 | ||
732 | static void peer_abort_upcall(struct iwch_ep *ep) | |
733 | { | |
734 | struct iw_cm_event event; | |
735 | ||
33718363 | 736 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
737 | memset(&event, 0, sizeof(event)); |
738 | event.event = IW_CM_EVENT_CLOSE; | |
739 | event.status = -ECONNRESET; | |
740 | if (ep->com.cm_id) { | |
741 | PDBG("abort delivered ep %p cm_id %p tid %d\n", ep, | |
742 | ep->com.cm_id, ep->hwtid); | |
743 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
744 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
745 | ep->com.cm_id = NULL; | |
746 | ep->com.qp = NULL; | |
747 | } | |
748 | } | |
749 | ||
750 | static void connect_reply_upcall(struct iwch_ep *ep, int status) | |
751 | { | |
752 | struct iw_cm_event event; | |
753 | ||
33718363 | 754 | PDBG("%s ep %p status %d\n", __func__, ep, status); |
b038ced7 SW |
755 | memset(&event, 0, sizeof(event)); |
756 | event.event = IW_CM_EVENT_CONNECT_REPLY; | |
757 | event.status = status; | |
758 | event.local_addr = ep->com.local_addr; | |
759 | event.remote_addr = ep->com.remote_addr; | |
760 | ||
761 | if ((status == 0) || (status == -ECONNREFUSED)) { | |
762 | event.private_data_len = ep->plen; | |
763 | event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); | |
764 | } | |
765 | if (ep->com.cm_id) { | |
33718363 | 766 | PDBG("%s ep %p tid %d status %d\n", __func__, ep, |
b038ced7 SW |
767 | ep->hwtid, status); |
768 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
769 | } | |
770 | if (status < 0) { | |
771 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
772 | ep->com.cm_id = NULL; | |
773 | ep->com.qp = NULL; | |
774 | } | |
775 | } | |
776 | ||
777 | static void connect_request_upcall(struct iwch_ep *ep) | |
778 | { | |
779 | struct iw_cm_event event; | |
780 | ||
33718363 | 781 | PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
b038ced7 SW |
782 | memset(&event, 0, sizeof(event)); |
783 | event.event = IW_CM_EVENT_CONNECT_REQUEST; | |
784 | event.local_addr = ep->com.local_addr; | |
785 | event.remote_addr = ep->com.remote_addr; | |
786 | event.private_data_len = ep->plen; | |
787 | event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); | |
788 | event.provider_data = ep; | |
789 | if (state_read(&ep->parent_ep->com) != DEAD) | |
790 | ep->parent_ep->com.cm_id->event_handler( | |
791 | ep->parent_ep->com.cm_id, | |
792 | &event); | |
793 | put_ep(&ep->parent_ep->com); | |
794 | ep->parent_ep = NULL; | |
795 | } | |
796 | ||
797 | static void established_upcall(struct iwch_ep *ep) | |
798 | { | |
799 | struct iw_cm_event event; | |
800 | ||
33718363 | 801 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
802 | memset(&event, 0, sizeof(event)); |
803 | event.event = IW_CM_EVENT_ESTABLISHED; | |
804 | if (ep->com.cm_id) { | |
33718363 | 805 | PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
b038ced7 SW |
806 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
807 | } | |
808 | } | |
809 | ||
810 | static int update_rx_credits(struct iwch_ep *ep, u32 credits) | |
811 | { | |
812 | struct cpl_rx_data_ack *req; | |
813 | struct sk_buff *skb; | |
814 | ||
33718363 | 815 | PDBG("%s ep %p credits %u\n", __func__, ep, credits); |
b038ced7 SW |
816 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
817 | if (!skb) { | |
818 | printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n"); | |
819 | return 0; | |
820 | } | |
821 | ||
822 | req = (struct cpl_rx_data_ack *) skb_put(skb, sizeof(*req)); | |
823 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
824 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid)); | |
825 | req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1)); | |
826 | skb->priority = CPL_PRIORITY_ACK; | |
04b5d028 | 827 | iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
828 | return credits; |
829 | } | |
830 | ||
831 | static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb) | |
832 | { | |
833 | struct mpa_message *mpa; | |
834 | u16 plen; | |
835 | struct iwch_qp_attributes attrs; | |
836 | enum iwch_qp_attr_mask mask; | |
837 | int err; | |
838 | ||
33718363 | 839 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
840 | |
841 | /* | |
842 | * Stop mpa timer. If it expired, then the state has | |
843 | * changed and we bail since ep_timeout already aborted | |
844 | * the connection. | |
845 | */ | |
846 | stop_ep_timer(ep); | |
847 | if (state_read(&ep->com) != MPA_REQ_SENT) | |
848 | return; | |
849 | ||
850 | /* | |
851 | * If we get more than the supported amount of private data | |
852 | * then we must fail this connection. | |
853 | */ | |
854 | if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { | |
855 | err = -EINVAL; | |
856 | goto err; | |
857 | } | |
858 | ||
859 | /* | |
860 | * copy the new data into our accumulation buffer. | |
861 | */ | |
d626f62b ACM |
862 | skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), |
863 | skb->len); | |
b038ced7 SW |
864 | ep->mpa_pkt_len += skb->len; |
865 | ||
866 | /* | |
867 | * if we don't even have the mpa message, then bail. | |
868 | */ | |
869 | if (ep->mpa_pkt_len < sizeof(*mpa)) | |
870 | return; | |
871 | mpa = (struct mpa_message *) ep->mpa_pkt; | |
872 | ||
873 | /* Validate MPA header. */ | |
874 | if (mpa->revision != mpa_rev) { | |
875 | err = -EPROTO; | |
876 | goto err; | |
877 | } | |
878 | if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) { | |
879 | err = -EPROTO; | |
880 | goto err; | |
881 | } | |
882 | ||
883 | plen = ntohs(mpa->private_data_size); | |
884 | ||
885 | /* | |
886 | * Fail if there's too much private data. | |
887 | */ | |
888 | if (plen > MPA_MAX_PRIVATE_DATA) { | |
889 | err = -EPROTO; | |
890 | goto err; | |
891 | } | |
892 | ||
893 | /* | |
894 | * If plen does not account for pkt size | |
895 | */ | |
896 | if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { | |
897 | err = -EPROTO; | |
898 | goto err; | |
899 | } | |
900 | ||
901 | ep->plen = (u8) plen; | |
902 | ||
903 | /* | |
904 | * If we don't have all the pdata yet, then bail. | |
905 | * We'll continue process when more data arrives. | |
906 | */ | |
907 | if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) | |
908 | return; | |
909 | ||
910 | if (mpa->flags & MPA_REJECT) { | |
911 | err = -ECONNREFUSED; | |
912 | goto err; | |
913 | } | |
914 | ||
915 | /* | |
916 | * If we get here we have accumulated the entire mpa | |
917 | * start reply message including private data. And | |
918 | * the MPA header is valid. | |
919 | */ | |
920 | state_set(&ep->com, FPDU_MODE); | |
f8b0dfd1 | 921 | ep->mpa_attr.initiator = 1; |
b038ced7 SW |
922 | ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; |
923 | ep->mpa_attr.recv_marker_enabled = markers_enabled; | |
924 | ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; | |
925 | ep->mpa_attr.version = mpa_rev; | |
926 | PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " | |
33718363 | 927 | "xmit_marker_enabled=%d, version=%d\n", __func__, |
b038ced7 SW |
928 | ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, |
929 | ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); | |
930 | ||
931 | attrs.mpa_attr = ep->mpa_attr; | |
932 | attrs.max_ird = ep->ird; | |
933 | attrs.max_ord = ep->ord; | |
934 | attrs.llp_stream_handle = ep; | |
935 | attrs.next_state = IWCH_QP_STATE_RTS; | |
936 | ||
937 | mask = IWCH_QP_ATTR_NEXT_STATE | | |
938 | IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR | | |
939 | IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD; | |
940 | ||
941 | /* bind QP and TID with INIT_WR */ | |
942 | err = iwch_modify_qp(ep->com.qp->rhp, | |
943 | ep->com.qp, mask, &attrs, 1); | |
f8b0dfd1 SW |
944 | if (err) |
945 | goto err; | |
946 | ||
947 | if (peer2peer && iwch_rqes_posted(ep->com.qp) == 0) { | |
948 | iwch_post_zb_read(ep->com.qp); | |
949 | } | |
950 | ||
951 | goto out; | |
b038ced7 SW |
952 | err: |
953 | abort_connection(ep, skb, GFP_KERNEL); | |
954 | out: | |
955 | connect_reply_upcall(ep, err); | |
956 | return; | |
957 | } | |
958 | ||
959 | static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb) | |
960 | { | |
961 | struct mpa_message *mpa; | |
962 | u16 plen; | |
963 | ||
33718363 | 964 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
965 | |
966 | /* | |
967 | * Stop mpa timer. If it expired, then the state has | |
968 | * changed and we bail since ep_timeout already aborted | |
969 | * the connection. | |
970 | */ | |
971 | stop_ep_timer(ep); | |
972 | if (state_read(&ep->com) != MPA_REQ_WAIT) | |
973 | return; | |
974 | ||
975 | /* | |
976 | * If we get more than the supported amount of private data | |
977 | * then we must fail this connection. | |
978 | */ | |
979 | if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { | |
980 | abort_connection(ep, skb, GFP_KERNEL); | |
981 | return; | |
982 | } | |
983 | ||
33718363 | 984 | PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); |
b038ced7 SW |
985 | |
986 | /* | |
987 | * Copy the new data into our accumulation buffer. | |
988 | */ | |
d626f62b ACM |
989 | skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), |
990 | skb->len); | |
b038ced7 SW |
991 | ep->mpa_pkt_len += skb->len; |
992 | ||
993 | /* | |
994 | * If we don't even have the mpa message, then bail. | |
995 | * We'll continue process when more data arrives. | |
996 | */ | |
997 | if (ep->mpa_pkt_len < sizeof(*mpa)) | |
998 | return; | |
33718363 | 999 | PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); |
b038ced7 SW |
1000 | mpa = (struct mpa_message *) ep->mpa_pkt; |
1001 | ||
1002 | /* | |
1003 | * Validate MPA Header. | |
1004 | */ | |
1005 | if (mpa->revision != mpa_rev) { | |
1006 | abort_connection(ep, skb, GFP_KERNEL); | |
1007 | return; | |
1008 | } | |
1009 | ||
1010 | if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) { | |
1011 | abort_connection(ep, skb, GFP_KERNEL); | |
1012 | return; | |
1013 | } | |
1014 | ||
1015 | plen = ntohs(mpa->private_data_size); | |
1016 | ||
1017 | /* | |
1018 | * Fail if there's too much private data. | |
1019 | */ | |
1020 | if (plen > MPA_MAX_PRIVATE_DATA) { | |
1021 | abort_connection(ep, skb, GFP_KERNEL); | |
1022 | return; | |
1023 | } | |
1024 | ||
1025 | /* | |
1026 | * If plen does not account for pkt size | |
1027 | */ | |
1028 | if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { | |
1029 | abort_connection(ep, skb, GFP_KERNEL); | |
1030 | return; | |
1031 | } | |
1032 | ep->plen = (u8) plen; | |
1033 | ||
1034 | /* | |
1035 | * If we don't have all the pdata yet, then bail. | |
1036 | */ | |
1037 | if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) | |
1038 | return; | |
1039 | ||
1040 | /* | |
1041 | * If we get here we have accumulated the entire mpa | |
1042 | * start reply message including private data. | |
1043 | */ | |
f8b0dfd1 | 1044 | ep->mpa_attr.initiator = 0; |
b038ced7 SW |
1045 | ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; |
1046 | ep->mpa_attr.recv_marker_enabled = markers_enabled; | |
1047 | ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; | |
1048 | ep->mpa_attr.version = mpa_rev; | |
1049 | PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " | |
33718363 | 1050 | "xmit_marker_enabled=%d, version=%d\n", __func__, |
b038ced7 SW |
1051 | ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, |
1052 | ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); | |
1053 | ||
1054 | state_set(&ep->com, MPA_REQ_RCVD); | |
1055 | ||
1056 | /* drive upcall */ | |
1057 | connect_request_upcall(ep); | |
1058 | return; | |
1059 | } | |
1060 | ||
1061 | static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1062 | { | |
1063 | struct iwch_ep *ep = ctx; | |
1064 | struct cpl_rx_data *hdr = cplhdr(skb); | |
1065 | unsigned int dlen = ntohs(hdr->len); | |
1066 | ||
33718363 | 1067 | PDBG("%s ep %p dlen %u\n", __func__, ep, dlen); |
b038ced7 SW |
1068 | |
1069 | skb_pull(skb, sizeof(*hdr)); | |
1070 | skb_trim(skb, dlen); | |
1071 | ||
de3d3530 SW |
1072 | ep->rcv_seq += dlen; |
1073 | BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen)); | |
1074 | ||
b038ced7 SW |
1075 | switch (state_read(&ep->com)) { |
1076 | case MPA_REQ_SENT: | |
1077 | process_mpa_reply(ep, skb); | |
1078 | break; | |
1079 | case MPA_REQ_WAIT: | |
1080 | process_mpa_request(ep, skb); | |
1081 | break; | |
1082 | case MPA_REP_SENT: | |
1083 | break; | |
1084 | default: | |
1085 | printk(KERN_ERR MOD "%s Unexpected streaming data." | |
1086 | " ep %p state %d tid %d\n", | |
33718363 | 1087 | __func__, ep, state_read(&ep->com), ep->hwtid); |
b038ced7 SW |
1088 | |
1089 | /* | |
1090 | * The ep will timeout and inform the ULP of the failure. | |
1091 | * See ep_timeout(). | |
1092 | */ | |
1093 | break; | |
1094 | } | |
1095 | ||
1096 | /* update RX credits */ | |
1097 | update_rx_credits(ep, dlen); | |
1098 | ||
1099 | return CPL_RET_BUF_DONE; | |
1100 | } | |
1101 | ||
1102 | /* | |
1103 | * Upcall from the adapter indicating data has been transmitted. | |
1104 | * For us its just the single MPA request or reply. We can now free | |
1105 | * the skb holding the mpa message. | |
1106 | */ | |
1107 | static int tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1108 | { | |
1109 | struct iwch_ep *ep = ctx; | |
1110 | struct cpl_wr_ack *hdr = cplhdr(skb); | |
1111 | unsigned int credits = ntohs(hdr->credits); | |
b038ced7 | 1112 | |
33718363 | 1113 | PDBG("%s ep %p credits %u\n", __func__, ep, credits); |
b038ced7 | 1114 | |
f8b0dfd1 SW |
1115 | if (credits == 0) { |
1116 | PDBG(KERN_ERR "%s 0 credit ack ep %p state %u\n", | |
1117 | __func__, ep, state_read(&ep->com)); | |
b038ced7 | 1118 | return CPL_RET_BUF_DONE; |
f8b0dfd1 SW |
1119 | } |
1120 | ||
b038ced7 | 1121 | BUG_ON(credits != 1); |
b038ced7 | 1122 | dst_confirm(ep->dst); |
f8b0dfd1 SW |
1123 | if (!ep->mpa_skb) { |
1124 | PDBG("%s rdma_init wr_ack ep %p state %u\n", | |
1125 | __func__, ep, state_read(&ep->com)); | |
1126 | if (ep->mpa_attr.initiator) { | |
1127 | PDBG("%s initiator ep %p state %u\n", | |
1128 | __func__, ep, state_read(&ep->com)); | |
1129 | if (peer2peer) | |
1130 | iwch_post_zb_read(ep->com.qp); | |
1131 | } else { | |
1132 | PDBG("%s responder ep %p state %u\n", | |
1133 | __func__, ep, state_read(&ep->com)); | |
1134 | ep->com.rpl_done = 1; | |
1135 | wake_up(&ep->com.waitq); | |
1136 | } | |
1137 | } else { | |
1138 | PDBG("%s lsm ack ep %p state %u freeing skb\n", | |
1139 | __func__, ep, state_read(&ep->com)); | |
1140 | kfree_skb(ep->mpa_skb); | |
1141 | ep->mpa_skb = NULL; | |
b038ced7 SW |
1142 | } |
1143 | return CPL_RET_BUF_DONE; | |
1144 | } | |
1145 | ||
1146 | static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1147 | { | |
1148 | struct iwch_ep *ep = ctx; | |
989a1780 SW |
1149 | unsigned long flags; |
1150 | int release = 0; | |
b038ced7 | 1151 | |
33718363 | 1152 | PDBG("%s ep %p\n", __func__, ep); |
989a1780 | 1153 | BUG_ON(!ep); |
b038ced7 | 1154 | |
aff9e39d SW |
1155 | /* |
1156 | * We get 2 abort replies from the HW. The first one must | |
1157 | * be ignored except for scribbling that we need one more. | |
1158 | */ | |
874d8df5 SW |
1159 | if (!(ep->com.flags & ABORT_REQ_IN_PROGRESS)) { |
1160 | ep->com.flags |= ABORT_REQ_IN_PROGRESS; | |
aff9e39d SW |
1161 | return CPL_RET_BUF_DONE; |
1162 | } | |
1163 | ||
989a1780 SW |
1164 | spin_lock_irqsave(&ep->com.lock, flags); |
1165 | switch (ep->com.state) { | |
1166 | case ABORTING: | |
1167 | close_complete_upcall(ep); | |
1168 | __state_set(&ep->com, DEAD); | |
1169 | release = 1; | |
1170 | break; | |
1171 | default: | |
1172 | printk(KERN_ERR "%s ep %p state %d\n", | |
1173 | __func__, ep, ep->com.state); | |
1174 | break; | |
1175 | } | |
1176 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1177 | ||
1178 | if (release) | |
1179 | release_ep_resources(ep); | |
b038ced7 SW |
1180 | return CPL_RET_BUF_DONE; |
1181 | } | |
1182 | ||
96d0e493 SW |
1183 | /* |
1184 | * Return whether a failed active open has allocated a TID | |
1185 | */ | |
1186 | static inline int act_open_has_tid(int status) | |
1187 | { | |
1188 | return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST && | |
1189 | status != CPL_ERR_ARP_MISS; | |
1190 | } | |
1191 | ||
b038ced7 SW |
1192 | static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
1193 | { | |
1194 | struct iwch_ep *ep = ctx; | |
1195 | struct cpl_act_open_rpl *rpl = cplhdr(skb); | |
1196 | ||
33718363 | 1197 | PDBG("%s ep %p status %u errno %d\n", __func__, ep, rpl->status, |
b038ced7 SW |
1198 | status2errno(rpl->status)); |
1199 | connect_reply_upcall(ep, status2errno(rpl->status)); | |
1200 | state_set(&ep->com, DEAD); | |
8176d297 | 1201 | if (ep->com.tdev->type != T3A && act_open_has_tid(rpl->status)) |
b038ced7 SW |
1202 | release_tid(ep->com.tdev, GET_TID(rpl), NULL); |
1203 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
1204 | dst_release(ep->dst); | |
1205 | l2t_release(L2DATA(ep->com.tdev), ep->l2t); | |
1206 | put_ep(&ep->com); | |
1207 | return CPL_RET_BUF_DONE; | |
1208 | } | |
1209 | ||
1210 | static int listen_start(struct iwch_listen_ep *ep) | |
1211 | { | |
1212 | struct sk_buff *skb; | |
1213 | struct cpl_pass_open_req *req; | |
1214 | ||
33718363 | 1215 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1216 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
1217 | if (!skb) { | |
1218 | printk(KERN_ERR MOD "t3c_listen_start failed to alloc skb!\n"); | |
1219 | return -ENOMEM; | |
1220 | } | |
1221 | ||
1222 | req = (struct cpl_pass_open_req *) skb_put(skb, sizeof(*req)); | |
1223 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1224 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, ep->stid)); | |
1225 | req->local_port = ep->com.local_addr.sin_port; | |
1226 | req->local_ip = ep->com.local_addr.sin_addr.s_addr; | |
1227 | req->peer_port = 0; | |
1228 | req->peer_ip = 0; | |
1229 | req->peer_netmask = 0; | |
1230 | req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS); | |
1231 | req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10)); | |
1232 | req->opt1 = htonl(V_CONN_POLICY(CPL_CONN_POLICY_ASK)); | |
1233 | ||
1234 | skb->priority = 1; | |
04b5d028 | 1235 | return iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
1236 | } |
1237 | ||
1238 | static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1239 | { | |
1240 | struct iwch_listen_ep *ep = ctx; | |
1241 | struct cpl_pass_open_rpl *rpl = cplhdr(skb); | |
1242 | ||
33718363 | 1243 | PDBG("%s ep %p status %d error %d\n", __func__, ep, |
b038ced7 SW |
1244 | rpl->status, status2errno(rpl->status)); |
1245 | ep->com.rpl_err = status2errno(rpl->status); | |
1246 | ep->com.rpl_done = 1; | |
1247 | wake_up(&ep->com.waitq); | |
1248 | ||
1249 | return CPL_RET_BUF_DONE; | |
1250 | } | |
1251 | ||
1252 | static int listen_stop(struct iwch_listen_ep *ep) | |
1253 | { | |
1254 | struct sk_buff *skb; | |
1255 | struct cpl_close_listserv_req *req; | |
1256 | ||
33718363 | 1257 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1258 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
1259 | if (!skb) { | |
33718363 | 1260 | printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); |
b038ced7 SW |
1261 | return -ENOMEM; |
1262 | } | |
1263 | req = (struct cpl_close_listserv_req *) skb_put(skb, sizeof(*req)); | |
1264 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
60be4b59 | 1265 | req->cpu_idx = 0; |
b038ced7 SW |
1266 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid)); |
1267 | skb->priority = 1; | |
04b5d028 | 1268 | return iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
1269 | } |
1270 | ||
1271 | static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb, | |
1272 | void *ctx) | |
1273 | { | |
1274 | struct iwch_listen_ep *ep = ctx; | |
1275 | struct cpl_close_listserv_rpl *rpl = cplhdr(skb); | |
1276 | ||
33718363 | 1277 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1278 | ep->com.rpl_err = status2errno(rpl->status); |
1279 | ep->com.rpl_done = 1; | |
1280 | wake_up(&ep->com.waitq); | |
1281 | return CPL_RET_BUF_DONE; | |
1282 | } | |
1283 | ||
1284 | static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb) | |
1285 | { | |
1286 | struct cpl_pass_accept_rpl *rpl; | |
1287 | unsigned int mtu_idx; | |
1288 | u32 opt0h, opt0l, opt2; | |
1289 | int wscale; | |
1290 | ||
33718363 | 1291 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1292 | BUG_ON(skb_cloned(skb)); |
1293 | skb_trim(skb, sizeof(*rpl)); | |
1294 | skb_get(skb); | |
1295 | mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); | |
1296 | wscale = compute_wscale(rcv_win); | |
1297 | opt0h = V_NAGLE(0) | | |
1298 | V_NO_CONG(nocong) | | |
1299 | V_KEEP_ALIVE(1) | | |
1300 | F_TCAM_BYPASS | | |
1301 | V_WND_SCALE(wscale) | | |
1302 | V_MSS_IDX(mtu_idx) | | |
1303 | V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); | |
1304 | opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); | |
1305 | opt2 = V_FLAVORS_VALID(1) | V_CONG_CONTROL_FLAVOR(cong_flavor); | |
1306 | ||
1307 | rpl = cplhdr(skb); | |
1308 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1309 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid)); | |
1310 | rpl->peer_ip = peer_ip; | |
1311 | rpl->opt0h = htonl(opt0h); | |
1312 | rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT); | |
1313 | rpl->opt2 = htonl(opt2); | |
1314 | rpl->rsvd = rpl->opt2; /* workaround for HW bug */ | |
1315 | skb->priority = CPL_PRIORITY_SETUP; | |
04b5d028 | 1316 | iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
1317 | |
1318 | return; | |
1319 | } | |
1320 | ||
1321 | static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip, | |
1322 | struct sk_buff *skb) | |
1323 | { | |
33718363 | 1324 | PDBG("%s t3cdev %p tid %u peer_ip %x\n", __func__, tdev, hwtid, |
b038ced7 SW |
1325 | peer_ip); |
1326 | BUG_ON(skb_cloned(skb)); | |
1327 | skb_trim(skb, sizeof(struct cpl_tid_release)); | |
1328 | skb_get(skb); | |
1329 | ||
8176d297 | 1330 | if (tdev->type != T3A) |
b038ced7 SW |
1331 | release_tid(tdev, hwtid, skb); |
1332 | else { | |
1333 | struct cpl_pass_accept_rpl *rpl; | |
1334 | ||
1335 | rpl = cplhdr(skb); | |
1336 | skb->priority = CPL_PRIORITY_SETUP; | |
1337 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1338 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, | |
1339 | hwtid)); | |
1340 | rpl->peer_ip = peer_ip; | |
1341 | rpl->opt0h = htonl(F_TCAM_BYPASS); | |
1342 | rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT); | |
1343 | rpl->opt2 = 0; | |
1344 | rpl->rsvd = rpl->opt2; | |
04b5d028 | 1345 | iwch_cxgb3_ofld_send(tdev, skb); |
b038ced7 SW |
1346 | } |
1347 | } | |
1348 | ||
1349 | static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1350 | { | |
1351 | struct iwch_ep *child_ep, *parent_ep = ctx; | |
1352 | struct cpl_pass_accept_req *req = cplhdr(skb); | |
1353 | unsigned int hwtid = GET_TID(req); | |
1354 | struct dst_entry *dst; | |
1355 | struct l2t_entry *l2t; | |
1356 | struct rtable *rt; | |
1357 | struct iff_mac tim; | |
1358 | ||
33718363 | 1359 | PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid); |
b038ced7 SW |
1360 | |
1361 | if (state_read(&parent_ep->com) != LISTEN) { | |
1362 | printk(KERN_ERR "%s - listening ep not in LISTEN\n", | |
33718363 | 1363 | __func__); |
b038ced7 SW |
1364 | goto reject; |
1365 | } | |
1366 | ||
1367 | /* | |
1368 | * Find the netdev for this connection request. | |
1369 | */ | |
1370 | tim.mac_addr = req->dst_mac; | |
1371 | tim.vlan_tag = ntohs(req->vlan_tag); | |
1372 | if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) { | |
1373 | printk(KERN_ERR | |
1374 | "%s bad dst mac %02x %02x %02x %02x %02x %02x\n", | |
33718363 | 1375 | __func__, |
b038ced7 SW |
1376 | req->dst_mac[0], |
1377 | req->dst_mac[1], | |
1378 | req->dst_mac[2], | |
1379 | req->dst_mac[3], | |
1380 | req->dst_mac[4], | |
1381 | req->dst_mac[5]); | |
1382 | goto reject; | |
1383 | } | |
1384 | ||
1385 | /* Find output route */ | |
1386 | rt = find_route(tdev, | |
1387 | req->local_ip, | |
1388 | req->peer_ip, | |
1389 | req->local_port, | |
1390 | req->peer_port, G_PASS_OPEN_TOS(ntohl(req->tos_tid))); | |
1391 | if (!rt) { | |
1392 | printk(KERN_ERR MOD "%s - failed to find dst entry!\n", | |
33718363 | 1393 | __func__); |
b038ced7 SW |
1394 | goto reject; |
1395 | } | |
1396 | dst = &rt->u.dst; | |
1397 | l2t = t3_l2t_get(tdev, dst->neighbour, dst->neighbour->dev); | |
1398 | if (!l2t) { | |
1399 | printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n", | |
33718363 | 1400 | __func__); |
b038ced7 SW |
1401 | dst_release(dst); |
1402 | goto reject; | |
1403 | } | |
1404 | child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL); | |
1405 | if (!child_ep) { | |
1406 | printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n", | |
33718363 | 1407 | __func__); |
b038ced7 SW |
1408 | l2t_release(L2DATA(tdev), l2t); |
1409 | dst_release(dst); | |
1410 | goto reject; | |
1411 | } | |
1412 | state_set(&child_ep->com, CONNECTING); | |
1413 | child_ep->com.tdev = tdev; | |
1414 | child_ep->com.cm_id = NULL; | |
1415 | child_ep->com.local_addr.sin_family = PF_INET; | |
1416 | child_ep->com.local_addr.sin_port = req->local_port; | |
1417 | child_ep->com.local_addr.sin_addr.s_addr = req->local_ip; | |
1418 | child_ep->com.remote_addr.sin_family = PF_INET; | |
1419 | child_ep->com.remote_addr.sin_port = req->peer_port; | |
1420 | child_ep->com.remote_addr.sin_addr.s_addr = req->peer_ip; | |
1421 | get_ep(&parent_ep->com); | |
1422 | child_ep->parent_ep = parent_ep; | |
1423 | child_ep->tos = G_PASS_OPEN_TOS(ntohl(req->tos_tid)); | |
1424 | child_ep->l2t = l2t; | |
1425 | child_ep->dst = dst; | |
1426 | child_ep->hwtid = hwtid; | |
1427 | init_timer(&child_ep->timer); | |
1428 | cxgb3_insert_tid(tdev, &t3c_client, child_ep, hwtid); | |
1429 | accept_cr(child_ep, req->peer_ip, skb); | |
1430 | goto out; | |
1431 | reject: | |
1432 | reject_cr(tdev, hwtid, req->peer_ip, skb); | |
1433 | out: | |
1434 | return CPL_RET_BUF_DONE; | |
1435 | } | |
1436 | ||
1437 | static int pass_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1438 | { | |
1439 | struct iwch_ep *ep = ctx; | |
1440 | struct cpl_pass_establish *req = cplhdr(skb); | |
1441 | ||
33718363 | 1442 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 | 1443 | ep->snd_seq = ntohl(req->snd_isn); |
de3d3530 | 1444 | ep->rcv_seq = ntohl(req->rcv_isn); |
b038ced7 SW |
1445 | |
1446 | set_emss(ep, ntohs(req->tcp_opt)); | |
1447 | ||
1448 | dst_confirm(ep->dst); | |
1449 | state_set(&ep->com, MPA_REQ_WAIT); | |
1450 | start_ep_timer(ep); | |
1451 | ||
1452 | return CPL_RET_BUF_DONE; | |
1453 | } | |
1454 | ||
1455 | static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1456 | { | |
1457 | struct iwch_ep *ep = ctx; | |
1458 | struct iwch_qp_attributes attrs; | |
1459 | unsigned long flags; | |
1460 | int disconnect = 1; | |
1461 | int release = 0; | |
1462 | ||
33718363 | 1463 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1464 | dst_confirm(ep->dst); |
1465 | ||
1466 | spin_lock_irqsave(&ep->com.lock, flags); | |
1467 | switch (ep->com.state) { | |
1468 | case MPA_REQ_WAIT: | |
1469 | __state_set(&ep->com, CLOSING); | |
1470 | break; | |
1471 | case MPA_REQ_SENT: | |
1472 | __state_set(&ep->com, CLOSING); | |
1473 | connect_reply_upcall(ep, -ECONNRESET); | |
1474 | break; | |
1475 | case MPA_REQ_RCVD: | |
1476 | ||
1477 | /* | |
1478 | * We're gonna mark this puppy DEAD, but keep | |
1479 | * the reference on it until the ULP accepts or | |
1480 | * rejects the CR. | |
1481 | */ | |
1482 | __state_set(&ep->com, CLOSING); | |
1483 | get_ep(&ep->com); | |
1484 | break; | |
1485 | case MPA_REP_SENT: | |
1486 | __state_set(&ep->com, CLOSING); | |
1487 | ep->com.rpl_done = 1; | |
1488 | ep->com.rpl_err = -ECONNRESET; | |
1489 | PDBG("waking up ep %p\n", ep); | |
1490 | wake_up(&ep->com.waitq); | |
1491 | break; | |
1492 | case FPDU_MODE: | |
42e31753 | 1493 | start_ep_timer(ep); |
b038ced7 SW |
1494 | __state_set(&ep->com, CLOSING); |
1495 | attrs.next_state = IWCH_QP_STATE_CLOSING; | |
1496 | iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, | |
1497 | IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); | |
1498 | peer_close_upcall(ep); | |
1499 | break; | |
1500 | case ABORTING: | |
1501 | disconnect = 0; | |
1502 | break; | |
1503 | case CLOSING: | |
b038ced7 SW |
1504 | __state_set(&ep->com, MORIBUND); |
1505 | disconnect = 0; | |
1506 | break; | |
1507 | case MORIBUND: | |
1508 | stop_ep_timer(ep); | |
1509 | if (ep->com.cm_id && ep->com.qp) { | |
1510 | attrs.next_state = IWCH_QP_STATE_IDLE; | |
1511 | iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, | |
1512 | IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); | |
1513 | } | |
1514 | close_complete_upcall(ep); | |
1515 | __state_set(&ep->com, DEAD); | |
1516 | release = 1; | |
1517 | disconnect = 0; | |
1518 | break; | |
1519 | case DEAD: | |
1520 | disconnect = 0; | |
1521 | break; | |
1522 | default: | |
1523 | BUG_ON(1); | |
1524 | } | |
1525 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1526 | if (disconnect) | |
1527 | iwch_ep_disconnect(ep, 0, GFP_KERNEL); | |
1528 | if (release) | |
1529 | release_ep_resources(ep); | |
1530 | return CPL_RET_BUF_DONE; | |
1531 | } | |
1532 | ||
1533 | /* | |
1534 | * Returns whether an ABORT_REQ_RSS message is a negative advice. | |
1535 | */ | |
2b540355 | 1536 | static int is_neg_adv_abort(unsigned int status) |
b038ced7 SW |
1537 | { |
1538 | return status == CPL_ERR_RTX_NEG_ADVICE || | |
1539 | status == CPL_ERR_PERSIST_NEG_ADVICE; | |
1540 | } | |
1541 | ||
1542 | static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1543 | { | |
1544 | struct cpl_abort_req_rss *req = cplhdr(skb); | |
1545 | struct iwch_ep *ep = ctx; | |
1546 | struct cpl_abort_rpl *rpl; | |
1547 | struct sk_buff *rpl_skb; | |
1548 | struct iwch_qp_attributes attrs; | |
1549 | int ret; | |
989a1780 SW |
1550 | int release = 0; |
1551 | unsigned long flags; | |
b038ced7 | 1552 | |
1580367e | 1553 | if (is_neg_adv_abort(req->status)) { |
33718363 | 1554 | PDBG("%s neg_adv_abort ep %p tid %d\n", __func__, ep, |
1580367e SW |
1555 | ep->hwtid); |
1556 | t3_l2t_send_event(ep->com.tdev, ep->l2t); | |
1557 | return CPL_RET_BUF_DONE; | |
1558 | } | |
1559 | ||
aff9e39d SW |
1560 | /* |
1561 | * We get 2 peer aborts from the HW. The first one must | |
1562 | * be ignored except for scribbling that we need one more. | |
1563 | */ | |
874d8df5 SW |
1564 | if (!(ep->com.flags & PEER_ABORT_IN_PROGRESS)) { |
1565 | ep->com.flags |= PEER_ABORT_IN_PROGRESS; | |
aff9e39d SW |
1566 | return CPL_RET_BUF_DONE; |
1567 | } | |
1568 | ||
989a1780 SW |
1569 | spin_lock_irqsave(&ep->com.lock, flags); |
1570 | PDBG("%s ep %p state %u\n", __func__, ep, ep->com.state); | |
1571 | switch (ep->com.state) { | |
b038ced7 SW |
1572 | case CONNECTING: |
1573 | break; | |
1574 | case MPA_REQ_WAIT: | |
adf376b3 | 1575 | stop_ep_timer(ep); |
b038ced7 SW |
1576 | break; |
1577 | case MPA_REQ_SENT: | |
adf376b3 | 1578 | stop_ep_timer(ep); |
b038ced7 SW |
1579 | connect_reply_upcall(ep, -ECONNRESET); |
1580 | break; | |
1581 | case MPA_REP_SENT: | |
1582 | ep->com.rpl_done = 1; | |
1583 | ep->com.rpl_err = -ECONNRESET; | |
1584 | PDBG("waking up ep %p\n", ep); | |
1585 | wake_up(&ep->com.waitq); | |
1586 | break; | |
1587 | case MPA_REQ_RCVD: | |
1588 | ||
1589 | /* | |
1590 | * We're gonna mark this puppy DEAD, but keep | |
1591 | * the reference on it until the ULP accepts or | |
1592 | * rejects the CR. | |
1593 | */ | |
1594 | get_ep(&ep->com); | |
1595 | break; | |
1596 | case MORIBUND: | |
42e31753 | 1597 | case CLOSING: |
b038ced7 | 1598 | stop_ep_timer(ep); |
42e31753 | 1599 | /*FALLTHROUGH*/ |
b038ced7 | 1600 | case FPDU_MODE: |
b038ced7 SW |
1601 | if (ep->com.cm_id && ep->com.qp) { |
1602 | attrs.next_state = IWCH_QP_STATE_ERROR; | |
1603 | ret = iwch_modify_qp(ep->com.qp->rhp, | |
1604 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1605 | &attrs, 1); | |
1606 | if (ret) | |
1607 | printk(KERN_ERR MOD | |
1608 | "%s - qp <- error failed!\n", | |
33718363 | 1609 | __func__); |
b038ced7 SW |
1610 | } |
1611 | peer_abort_upcall(ep); | |
1612 | break; | |
1613 | case ABORTING: | |
1614 | break; | |
1615 | case DEAD: | |
33718363 | 1616 | PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__); |
989a1780 | 1617 | spin_unlock_irqrestore(&ep->com.lock, flags); |
b038ced7 SW |
1618 | return CPL_RET_BUF_DONE; |
1619 | default: | |
1620 | BUG_ON(1); | |
1621 | break; | |
1622 | } | |
1623 | dst_confirm(ep->dst); | |
989a1780 SW |
1624 | if (ep->com.state != ABORTING) { |
1625 | __state_set(&ep->com, DEAD); | |
1626 | release = 1; | |
1627 | } | |
1628 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
b038ced7 SW |
1629 | |
1630 | rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL); | |
1631 | if (!rpl_skb) { | |
1632 | printk(KERN_ERR MOD "%s - cannot allocate skb!\n", | |
33718363 | 1633 | __func__); |
989a1780 SW |
1634 | release = 1; |
1635 | goto out; | |
b038ced7 SW |
1636 | } |
1637 | rpl_skb->priority = CPL_PRIORITY_DATA; | |
1638 | rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl)); | |
1639 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); | |
1640 | rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
1641 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid)); | |
1642 | rpl->cmd = CPL_ABORT_NO_RST; | |
04b5d028 | 1643 | iwch_cxgb3_ofld_send(ep->com.tdev, rpl_skb); |
989a1780 SW |
1644 | out: |
1645 | if (release) | |
b038ced7 | 1646 | release_ep_resources(ep); |
b038ced7 SW |
1647 | return CPL_RET_BUF_DONE; |
1648 | } | |
1649 | ||
1650 | static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1651 | { | |
1652 | struct iwch_ep *ep = ctx; | |
1653 | struct iwch_qp_attributes attrs; | |
1654 | unsigned long flags; | |
1655 | int release = 0; | |
1656 | ||
33718363 | 1657 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1658 | BUG_ON(!ep); |
1659 | ||
1660 | /* The cm_id may be null if we failed to connect */ | |
1661 | spin_lock_irqsave(&ep->com.lock, flags); | |
1662 | switch (ep->com.state) { | |
1663 | case CLOSING: | |
b038ced7 SW |
1664 | __state_set(&ep->com, MORIBUND); |
1665 | break; | |
1666 | case MORIBUND: | |
1667 | stop_ep_timer(ep); | |
1668 | if ((ep->com.cm_id) && (ep->com.qp)) { | |
1669 | attrs.next_state = IWCH_QP_STATE_IDLE; | |
1670 | iwch_modify_qp(ep->com.qp->rhp, | |
1671 | ep->com.qp, | |
1672 | IWCH_QP_ATTR_NEXT_STATE, | |
1673 | &attrs, 1); | |
1674 | } | |
1675 | close_complete_upcall(ep); | |
1676 | __state_set(&ep->com, DEAD); | |
1677 | release = 1; | |
1678 | break; | |
42e31753 | 1679 | case ABORTING: |
b038ced7 | 1680 | case DEAD: |
c4d49776 | 1681 | break; |
b038ced7 SW |
1682 | default: |
1683 | BUG_ON(1); | |
1684 | break; | |
1685 | } | |
1686 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1687 | if (release) | |
1688 | release_ep_resources(ep); | |
1689 | return CPL_RET_BUF_DONE; | |
1690 | } | |
1691 | ||
1692 | /* | |
1693 | * T3A does 3 things when a TERM is received: | |
1694 | * 1) send up a CPL_RDMA_TERMINATE message with the TERM packet | |
1695 | * 2) generate an async event on the QP with the TERMINATE opcode | |
1696 | * 3) post a TERMINATE opcde cqe into the associated CQ. | |
1697 | * | |
1698 | * For (1), we save the message in the qp for later consumer consumption. | |
1699 | * For (2), we move the QP into TERMINATE, post a QP event and disconnect. | |
1700 | * For (3), we toss the CQE in cxio_poll_cq(). | |
1701 | * | |
1702 | * terminate() handles case (1)... | |
1703 | */ | |
1704 | static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1705 | { | |
1706 | struct iwch_ep *ep = ctx; | |
1707 | ||
42fb61f0 SW |
1708 | if (state_read(&ep->com) != FPDU_MODE) |
1709 | return CPL_RET_BUF_DONE; | |
1710 | ||
33718363 | 1711 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 | 1712 | skb_pull(skb, sizeof(struct cpl_rdma_terminate)); |
33718363 | 1713 | PDBG("%s saving %d bytes of term msg\n", __func__, skb->len); |
d626f62b ACM |
1714 | skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer, |
1715 | skb->len); | |
b038ced7 SW |
1716 | ep->com.qp->attr.terminate_msg_len = skb->len; |
1717 | ep->com.qp->attr.is_terminate_local = 0; | |
1718 | return CPL_RET_BUF_DONE; | |
1719 | } | |
1720 | ||
1721 | static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1722 | { | |
1723 | struct cpl_rdma_ec_status *rep = cplhdr(skb); | |
1724 | struct iwch_ep *ep = ctx; | |
1725 | ||
33718363 | 1726 | PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, |
b038ced7 SW |
1727 | rep->status); |
1728 | if (rep->status) { | |
1729 | struct iwch_qp_attributes attrs; | |
1730 | ||
1731 | printk(KERN_ERR MOD "%s BAD CLOSE - Aborting tid %u\n", | |
33718363 | 1732 | __func__, ep->hwtid); |
2f236735 | 1733 | stop_ep_timer(ep); |
b038ced7 SW |
1734 | attrs.next_state = IWCH_QP_STATE_ERROR; |
1735 | iwch_modify_qp(ep->com.qp->rhp, | |
1736 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1737 | &attrs, 1); | |
1738 | abort_connection(ep, NULL, GFP_KERNEL); | |
1739 | } | |
1740 | return CPL_RET_BUF_DONE; | |
1741 | } | |
1742 | ||
1743 | static void ep_timeout(unsigned long arg) | |
1744 | { | |
1745 | struct iwch_ep *ep = (struct iwch_ep *)arg; | |
1746 | struct iwch_qp_attributes attrs; | |
1747 | unsigned long flags; | |
989a1780 | 1748 | int abort = 1; |
b038ced7 SW |
1749 | |
1750 | spin_lock_irqsave(&ep->com.lock, flags); | |
33718363 | 1751 | PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid, |
b038ced7 SW |
1752 | ep->com.state); |
1753 | switch (ep->com.state) { | |
1754 | case MPA_REQ_SENT: | |
989a1780 | 1755 | __state_set(&ep->com, ABORTING); |
b038ced7 SW |
1756 | connect_reply_upcall(ep, -ETIMEDOUT); |
1757 | break; | |
1758 | case MPA_REQ_WAIT: | |
989a1780 | 1759 | __state_set(&ep->com, ABORTING); |
b038ced7 | 1760 | break; |
42e31753 | 1761 | case CLOSING: |
b038ced7 SW |
1762 | case MORIBUND: |
1763 | if (ep->com.cm_id && ep->com.qp) { | |
1764 | attrs.next_state = IWCH_QP_STATE_ERROR; | |
1765 | iwch_modify_qp(ep->com.qp->rhp, | |
1766 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1767 | &attrs, 1); | |
1768 | } | |
989a1780 | 1769 | __state_set(&ep->com, ABORTING); |
b038ced7 SW |
1770 | break; |
1771 | default: | |
989a1780 SW |
1772 | printk(KERN_ERR "%s unexpected state ep %p state %u\n", |
1773 | __func__, ep, ep->com.state); | |
1774 | WARN_ON(1); | |
1775 | abort = 0; | |
b038ced7 | 1776 | } |
b038ced7 | 1777 | spin_unlock_irqrestore(&ep->com.lock, flags); |
989a1780 SW |
1778 | if (abort) |
1779 | abort_connection(ep, NULL, GFP_ATOMIC); | |
b038ced7 SW |
1780 | put_ep(&ep->com); |
1781 | } | |
1782 | ||
1783 | int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) | |
1784 | { | |
1785 | int err; | |
1786 | struct iwch_ep *ep = to_ep(cm_id); | |
33718363 | 1787 | PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
b038ced7 SW |
1788 | |
1789 | if (state_read(&ep->com) == DEAD) { | |
1790 | put_ep(&ep->com); | |
1791 | return -ECONNRESET; | |
1792 | } | |
1793 | BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); | |
b038ced7 SW |
1794 | if (mpa_rev == 0) |
1795 | abort_connection(ep, NULL, GFP_KERNEL); | |
1796 | else { | |
1797 | err = send_mpa_reject(ep, pdata, pdata_len); | |
7d526e6b | 1798 | err = iwch_ep_disconnect(ep, 0, GFP_KERNEL); |
b038ced7 SW |
1799 | } |
1800 | return 0; | |
1801 | } | |
1802 | ||
1803 | int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
1804 | { | |
1805 | int err; | |
1806 | struct iwch_qp_attributes attrs; | |
1807 | enum iwch_qp_attr_mask mask; | |
1808 | struct iwch_ep *ep = to_ep(cm_id); | |
1809 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1810 | struct iwch_qp *qp = get_qhp(h, conn_param->qpn); | |
1811 | ||
33718363 | 1812 | PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
de3d3530 | 1813 | if (state_read(&ep->com) == DEAD) |
b038ced7 | 1814 | return -ECONNRESET; |
b038ced7 SW |
1815 | |
1816 | BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); | |
1817 | BUG_ON(!qp); | |
1818 | ||
1819 | if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) || | |
1820 | (conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) { | |
1821 | abort_connection(ep, NULL, GFP_KERNEL); | |
1822 | return -EINVAL; | |
1823 | } | |
1824 | ||
1825 | cm_id->add_ref(cm_id); | |
1826 | ep->com.cm_id = cm_id; | |
1827 | ep->com.qp = qp; | |
1828 | ||
1829 | ep->com.rpl_done = 0; | |
1830 | ep->com.rpl_err = 0; | |
1831 | ep->ird = conn_param->ird; | |
1832 | ep->ord = conn_param->ord; | |
96ac7e88 SW |
1833 | |
1834 | if (peer2peer && ep->ird == 0) | |
1835 | ep->ird = 1; | |
1836 | ||
33718363 | 1837 | PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord); |
de3d3530 | 1838 | |
b038ced7 | 1839 | get_ep(&ep->com); |
b038ced7 SW |
1840 | |
1841 | /* bind QP to EP and move to RTS */ | |
1842 | attrs.mpa_attr = ep->mpa_attr; | |
1f71f503 | 1843 | attrs.max_ird = ep->ird; |
b038ced7 SW |
1844 | attrs.max_ord = ep->ord; |
1845 | attrs.llp_stream_handle = ep; | |
1846 | attrs.next_state = IWCH_QP_STATE_RTS; | |
1847 | ||
1848 | /* bind QP and TID with INIT_WR */ | |
1849 | mask = IWCH_QP_ATTR_NEXT_STATE | | |
1850 | IWCH_QP_ATTR_LLP_STREAM_HANDLE | | |
1851 | IWCH_QP_ATTR_MPA_ATTR | | |
1852 | IWCH_QP_ATTR_MAX_IRD | | |
1853 | IWCH_QP_ATTR_MAX_ORD; | |
1854 | ||
1855 | err = iwch_modify_qp(ep->com.qp->rhp, | |
1856 | ep->com.qp, mask, &attrs, 1); | |
de3d3530 SW |
1857 | if (err) |
1858 | goto err; | |
b038ced7 | 1859 | |
f8b0dfd1 SW |
1860 | /* if needed, wait for wr_ack */ |
1861 | if (iwch_rqes_posted(qp)) { | |
1862 | wait_event(ep->com.waitq, ep->com.rpl_done); | |
1863 | err = ep->com.rpl_err; | |
1864 | if (err) | |
1865 | goto err; | |
1866 | } | |
1867 | ||
de3d3530 SW |
1868 | err = send_mpa_reply(ep, conn_param->private_data, |
1869 | conn_param->private_data_len); | |
1870 | if (err) | |
1871 | goto err; | |
1872 | ||
de3d3530 SW |
1873 | |
1874 | state_set(&ep->com, FPDU_MODE); | |
1875 | established_upcall(ep); | |
1876 | put_ep(&ep->com); | |
1877 | return 0; | |
1878 | err: | |
1879 | ep->com.cm_id = NULL; | |
1880 | ep->com.qp = NULL; | |
1881 | cm_id->rem_ref(cm_id); | |
b038ced7 SW |
1882 | put_ep(&ep->com); |
1883 | return err; | |
1884 | } | |
1885 | ||
8704e9a8 SW |
1886 | static int is_loopback_dst(struct iw_cm_id *cm_id) |
1887 | { | |
1888 | struct net_device *dev; | |
1889 | ||
1890 | dev = ip_dev_find(&init_net, cm_id->remote_addr.sin_addr.s_addr); | |
1891 | if (!dev) | |
1892 | return 0; | |
1893 | dev_put(dev); | |
1894 | return 1; | |
1895 | } | |
1896 | ||
b038ced7 SW |
1897 | int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
1898 | { | |
1899 | int err = 0; | |
1900 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1901 | struct iwch_ep *ep; | |
1902 | struct rtable *rt; | |
1903 | ||
8704e9a8 SW |
1904 | if (is_loopback_dst(cm_id)) { |
1905 | err = -ENOSYS; | |
1906 | goto out; | |
1907 | } | |
1908 | ||
b038ced7 SW |
1909 | ep = alloc_ep(sizeof(*ep), GFP_KERNEL); |
1910 | if (!ep) { | |
33718363 | 1911 | printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); |
b038ced7 SW |
1912 | err = -ENOMEM; |
1913 | goto out; | |
1914 | } | |
1915 | init_timer(&ep->timer); | |
1916 | ep->plen = conn_param->private_data_len; | |
1917 | if (ep->plen) | |
1918 | memcpy(ep->mpa_pkt + sizeof(struct mpa_message), | |
1919 | conn_param->private_data, ep->plen); | |
1920 | ep->ird = conn_param->ird; | |
1921 | ep->ord = conn_param->ord; | |
96ac7e88 SW |
1922 | |
1923 | if (peer2peer && ep->ord == 0) | |
1924 | ep->ord = 1; | |
1925 | ||
b038ced7 SW |
1926 | ep->com.tdev = h->rdev.t3cdev_p; |
1927 | ||
1928 | cm_id->add_ref(cm_id); | |
1929 | ep->com.cm_id = cm_id; | |
1930 | ep->com.qp = get_qhp(h, conn_param->qpn); | |
1931 | BUG_ON(!ep->com.qp); | |
33718363 | 1932 | PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn, |
b038ced7 SW |
1933 | ep->com.qp, cm_id); |
1934 | ||
1935 | /* | |
1936 | * Allocate an active TID to initiate a TCP connection. | |
1937 | */ | |
1938 | ep->atid = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep); | |
1939 | if (ep->atid == -1) { | |
33718363 | 1940 | printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); |
b038ced7 SW |
1941 | err = -ENOMEM; |
1942 | goto fail2; | |
1943 | } | |
1944 | ||
1945 | /* find a route */ | |
1946 | rt = find_route(h->rdev.t3cdev_p, | |
1947 | cm_id->local_addr.sin_addr.s_addr, | |
1948 | cm_id->remote_addr.sin_addr.s_addr, | |
1949 | cm_id->local_addr.sin_port, | |
1950 | cm_id->remote_addr.sin_port, IPTOS_LOWDELAY); | |
1951 | if (!rt) { | |
33718363 | 1952 | printk(KERN_ERR MOD "%s - cannot find route.\n", __func__); |
b038ced7 SW |
1953 | err = -EHOSTUNREACH; |
1954 | goto fail3; | |
1955 | } | |
1956 | ep->dst = &rt->u.dst; | |
1957 | ||
1958 | /* get a l2t entry */ | |
1959 | ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst->neighbour, | |
1960 | ep->dst->neighbour->dev); | |
1961 | if (!ep->l2t) { | |
33718363 | 1962 | printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__); |
b038ced7 SW |
1963 | err = -ENOMEM; |
1964 | goto fail4; | |
1965 | } | |
1966 | ||
1967 | state_set(&ep->com, CONNECTING); | |
1968 | ep->tos = IPTOS_LOWDELAY; | |
1969 | ep->com.local_addr = cm_id->local_addr; | |
1970 | ep->com.remote_addr = cm_id->remote_addr; | |
1971 | ||
1972 | /* send connect request to rnic */ | |
1973 | err = send_connect(ep); | |
1974 | if (!err) | |
1975 | goto out; | |
1976 | ||
1977 | l2t_release(L2DATA(h->rdev.t3cdev_p), ep->l2t); | |
1978 | fail4: | |
1979 | dst_release(ep->dst); | |
1980 | fail3: | |
1981 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
1982 | fail2: | |
dc35fac9 | 1983 | cm_id->rem_ref(cm_id); |
b038ced7 SW |
1984 | put_ep(&ep->com); |
1985 | out: | |
1986 | return err; | |
1987 | } | |
1988 | ||
1989 | int iwch_create_listen(struct iw_cm_id *cm_id, int backlog) | |
1990 | { | |
1991 | int err = 0; | |
1992 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1993 | struct iwch_listen_ep *ep; | |
1994 | ||
1995 | ||
1996 | might_sleep(); | |
1997 | ||
1998 | ep = alloc_ep(sizeof(*ep), GFP_KERNEL); | |
1999 | if (!ep) { | |
33718363 | 2000 | printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); |
b038ced7 SW |
2001 | err = -ENOMEM; |
2002 | goto fail1; | |
2003 | } | |
33718363 | 2004 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
2005 | ep->com.tdev = h->rdev.t3cdev_p; |
2006 | cm_id->add_ref(cm_id); | |
2007 | ep->com.cm_id = cm_id; | |
2008 | ep->backlog = backlog; | |
2009 | ep->com.local_addr = cm_id->local_addr; | |
2010 | ||
2011 | /* | |
2012 | * Allocate a server TID. | |
2013 | */ | |
2014 | ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep); | |
2015 | if (ep->stid == -1) { | |
33718363 | 2016 | printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); |
b038ced7 SW |
2017 | err = -ENOMEM; |
2018 | goto fail2; | |
2019 | } | |
2020 | ||
2021 | state_set(&ep->com, LISTEN); | |
2022 | err = listen_start(ep); | |
2023 | if (err) | |
2024 | goto fail3; | |
2025 | ||
2026 | /* wait for pass_open_rpl */ | |
2027 | wait_event(ep->com.waitq, ep->com.rpl_done); | |
2028 | err = ep->com.rpl_err; | |
2029 | if (!err) { | |
2030 | cm_id->provider_data = ep; | |
2031 | goto out; | |
2032 | } | |
2033 | fail3: | |
2034 | cxgb3_free_stid(ep->com.tdev, ep->stid); | |
2035 | fail2: | |
1b07db70 | 2036 | cm_id->rem_ref(cm_id); |
b038ced7 SW |
2037 | put_ep(&ep->com); |
2038 | fail1: | |
2039 | out: | |
2040 | return err; | |
2041 | } | |
2042 | ||
2043 | int iwch_destroy_listen(struct iw_cm_id *cm_id) | |
2044 | { | |
2045 | int err; | |
2046 | struct iwch_listen_ep *ep = to_listen_ep(cm_id); | |
2047 | ||
33718363 | 2048 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
2049 | |
2050 | might_sleep(); | |
2051 | state_set(&ep->com, DEAD); | |
2052 | ep->com.rpl_done = 0; | |
2053 | ep->com.rpl_err = 0; | |
2054 | err = listen_stop(ep); | |
04b5d028 SW |
2055 | if (err) |
2056 | goto done; | |
b038ced7 SW |
2057 | wait_event(ep->com.waitq, ep->com.rpl_done); |
2058 | cxgb3_free_stid(ep->com.tdev, ep->stid); | |
04b5d028 | 2059 | done: |
b038ced7 SW |
2060 | err = ep->com.rpl_err; |
2061 | cm_id->rem_ref(cm_id); | |
2062 | put_ep(&ep->com); | |
2063 | return err; | |
2064 | } | |
2065 | ||
2066 | int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp) | |
2067 | { | |
2068 | int ret=0; | |
2069 | unsigned long flags; | |
2070 | int close = 0; | |
04b5d028 SW |
2071 | int fatal = 0; |
2072 | struct t3cdev *tdev; | |
2073 | struct cxio_rdev *rdev; | |
b038ced7 SW |
2074 | |
2075 | spin_lock_irqsave(&ep->com.lock, flags); | |
2076 | ||
33718363 | 2077 | PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep, |
b038ced7 SW |
2078 | states[ep->com.state], abrupt); |
2079 | ||
04b5d028 SW |
2080 | tdev = (struct t3cdev *)ep->com.tdev; |
2081 | rdev = (struct cxio_rdev *)tdev->ulp; | |
2082 | if (cxio_fatal_error(rdev)) { | |
2083 | fatal = 1; | |
2084 | close_complete_upcall(ep); | |
2085 | ep->com.state = DEAD; | |
2086 | } | |
b038ced7 SW |
2087 | switch (ep->com.state) { |
2088 | case MPA_REQ_WAIT: | |
2089 | case MPA_REQ_SENT: | |
2090 | case MPA_REQ_RCVD: | |
2091 | case MPA_REP_SENT: | |
2092 | case FPDU_MODE: | |
b038ced7 | 2093 | close = 1; |
989a1780 SW |
2094 | if (abrupt) |
2095 | ep->com.state = ABORTING; | |
2096 | else { | |
2097 | ep->com.state = CLOSING; | |
2098 | start_ep_timer(ep); | |
2099 | } | |
b038ced7 SW |
2100 | break; |
2101 | case CLOSING: | |
b038ced7 | 2102 | close = 1; |
989a1780 SW |
2103 | if (abrupt) { |
2104 | stop_ep_timer(ep); | |
2105 | ep->com.state = ABORTING; | |
2106 | } else | |
2107 | ep->com.state = MORIBUND; | |
b038ced7 SW |
2108 | break; |
2109 | case MORIBUND: | |
989a1780 SW |
2110 | case ABORTING: |
2111 | case DEAD: | |
2112 | PDBG("%s ignoring disconnect ep %p state %u\n", | |
2113 | __func__, ep, ep->com.state); | |
b038ced7 SW |
2114 | break; |
2115 | default: | |
2116 | BUG(); | |
2117 | break; | |
2118 | } | |
989a1780 | 2119 | |
b038ced7 SW |
2120 | spin_unlock_irqrestore(&ep->com.lock, flags); |
2121 | if (close) { | |
2122 | if (abrupt) | |
2123 | ret = send_abort(ep, NULL, gfp); | |
2124 | else | |
2125 | ret = send_halfclose(ep, gfp); | |
04b5d028 SW |
2126 | if (ret) |
2127 | fatal = 1; | |
b038ced7 | 2128 | } |
04b5d028 SW |
2129 | if (fatal) |
2130 | release_ep_resources(ep); | |
b038ced7 SW |
2131 | return ret; |
2132 | } | |
2133 | ||
2134 | int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, | |
2135 | struct l2t_entry *l2t) | |
2136 | { | |
2137 | struct iwch_ep *ep = ctx; | |
2138 | ||
2139 | if (ep->dst != old) | |
2140 | return 0; | |
2141 | ||
33718363 | 2142 | PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new, |
b038ced7 SW |
2143 | l2t); |
2144 | dst_hold(new); | |
2145 | l2t_release(L2DATA(ep->com.tdev), ep->l2t); | |
2146 | ep->l2t = l2t; | |
2147 | dst_release(old); | |
2148 | ep->dst = new; | |
2149 | return 1; | |
2150 | } | |
2151 | ||
2152 | /* | |
2153 | * All the CM events are handled on a work queue to have a safe context. | |
2154 | */ | |
2155 | static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
2156 | { | |
2157 | struct iwch_ep_common *epc = ctx; | |
2158 | ||
2159 | get_ep(epc); | |
2160 | ||
2161 | /* | |
2162 | * Save ctx and tdev in the skb->cb area. | |
2163 | */ | |
2164 | *((void **) skb->cb) = ctx; | |
2165 | *((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev; | |
2166 | ||
2167 | /* | |
2168 | * Queue the skb and schedule the worker thread. | |
2169 | */ | |
2170 | skb_queue_tail(&rxq, skb); | |
2171 | queue_work(workq, &skb_work); | |
2172 | return 0; | |
2173 | } | |
2174 | ||
1ca19770 SW |
2175 | static int set_tcb_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
2176 | { | |
2177 | struct cpl_set_tcb_rpl *rpl = cplhdr(skb); | |
2178 | ||
2179 | if (rpl->status != CPL_ERR_NONE) { | |
2180 | printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u " | |
2181 | "for tid %u\n", rpl->status, GET_TID(rpl)); | |
2182 | } | |
2183 | return CPL_RET_BUF_DONE; | |
2184 | } | |
2185 | ||
b038ced7 SW |
2186 | int __init iwch_cm_init(void) |
2187 | { | |
2188 | skb_queue_head_init(&rxq); | |
2189 | ||
2190 | workq = create_singlethread_workqueue("iw_cxgb3"); | |
2191 | if (!workq) | |
2192 | return -ENOMEM; | |
2193 | ||
2194 | /* | |
2195 | * All upcalls from the T3 Core go to sched() to | |
2196 | * schedule the processing on a work queue. | |
2197 | */ | |
2198 | t3c_handlers[CPL_ACT_ESTABLISH] = sched; | |
2199 | t3c_handlers[CPL_ACT_OPEN_RPL] = sched; | |
2200 | t3c_handlers[CPL_RX_DATA] = sched; | |
2201 | t3c_handlers[CPL_TX_DMA_ACK] = sched; | |
2202 | t3c_handlers[CPL_ABORT_RPL_RSS] = sched; | |
2203 | t3c_handlers[CPL_ABORT_RPL] = sched; | |
2204 | t3c_handlers[CPL_PASS_OPEN_RPL] = sched; | |
2205 | t3c_handlers[CPL_CLOSE_LISTSRV_RPL] = sched; | |
2206 | t3c_handlers[CPL_PASS_ACCEPT_REQ] = sched; | |
2207 | t3c_handlers[CPL_PASS_ESTABLISH] = sched; | |
2208 | t3c_handlers[CPL_PEER_CLOSE] = sched; | |
2209 | t3c_handlers[CPL_CLOSE_CON_RPL] = sched; | |
2210 | t3c_handlers[CPL_ABORT_REQ_RSS] = sched; | |
2211 | t3c_handlers[CPL_RDMA_TERMINATE] = sched; | |
2212 | t3c_handlers[CPL_RDMA_EC_STATUS] = sched; | |
1ca19770 | 2213 | t3c_handlers[CPL_SET_TCB_RPL] = set_tcb_rpl; |
b038ced7 SW |
2214 | |
2215 | /* | |
2216 | * These are the real handlers that are called from a | |
2217 | * work queue. | |
2218 | */ | |
2219 | work_handlers[CPL_ACT_ESTABLISH] = act_establish; | |
2220 | work_handlers[CPL_ACT_OPEN_RPL] = act_open_rpl; | |
2221 | work_handlers[CPL_RX_DATA] = rx_data; | |
2222 | work_handlers[CPL_TX_DMA_ACK] = tx_ack; | |
2223 | work_handlers[CPL_ABORT_RPL_RSS] = abort_rpl; | |
2224 | work_handlers[CPL_ABORT_RPL] = abort_rpl; | |
2225 | work_handlers[CPL_PASS_OPEN_RPL] = pass_open_rpl; | |
2226 | work_handlers[CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl; | |
2227 | work_handlers[CPL_PASS_ACCEPT_REQ] = pass_accept_req; | |
2228 | work_handlers[CPL_PASS_ESTABLISH] = pass_establish; | |
2229 | work_handlers[CPL_PEER_CLOSE] = peer_close; | |
2230 | work_handlers[CPL_ABORT_REQ_RSS] = peer_abort; | |
2231 | work_handlers[CPL_CLOSE_CON_RPL] = close_con_rpl; | |
2232 | work_handlers[CPL_RDMA_TERMINATE] = terminate; | |
2233 | work_handlers[CPL_RDMA_EC_STATUS] = ec_status; | |
2234 | return 0; | |
2235 | } | |
2236 | ||
2237 | void __exit iwch_cm_term(void) | |
2238 | { | |
2239 | flush_workqueue(workq); | |
2240 | destroy_workqueue(workq); | |
2241 | } |