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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> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
b038ced7 SW |
35 | #include <linux/workqueue.h> |
36 | #include <linux/skbuff.h> | |
37 | #include <linux/timer.h> | |
38 | #include <linux/notifier.h> | |
8704e9a8 | 39 | #include <linux/inetdevice.h> |
b038ced7 SW |
40 | |
41 | #include <net/neighbour.h> | |
42 | #include <net/netevent.h> | |
43 | #include <net/route.h> | |
44 | ||
45 | #include "tcb.h" | |
46 | #include "cxgb3_offload.h" | |
47 | #include "iwch.h" | |
48 | #include "iwch_provider.h" | |
49 | #include "iwch_cm.h" | |
50 | ||
51 | static char *states[] = { | |
52 | "idle", | |
53 | "listen", | |
54 | "connecting", | |
55 | "mpa_wait_req", | |
56 | "mpa_req_sent", | |
57 | "mpa_req_rcvd", | |
58 | "mpa_rep_sent", | |
59 | "fpdu_mode", | |
60 | "aborting", | |
61 | "closing", | |
62 | "moribund", | |
63 | "dead", | |
64 | NULL, | |
65 | }; | |
66 | ||
f8b0dfd1 SW |
67 | int peer2peer = 0; |
68 | module_param(peer2peer, int, 0644); | |
69 | MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)"); | |
70 | ||
77a8d574 | 71 | static int ep_timeout_secs = 60; |
e54664c0 | 72 | module_param(ep_timeout_secs, int, 0644); |
b038ced7 | 73 | MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout " |
77a8d574 | 74 | "in seconds (default=60)"); |
b038ced7 SW |
75 | |
76 | static int mpa_rev = 1; | |
e54664c0 | 77 | module_param(mpa_rev, int, 0644); |
b038ced7 SW |
78 | MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, " |
79 | "1 is spec compliant. (default=1)"); | |
80 | ||
81 | static int markers_enabled = 0; | |
e54664c0 | 82 | module_param(markers_enabled, int, 0644); |
b038ced7 SW |
83 | MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)"); |
84 | ||
85 | static int crc_enabled = 1; | |
e54664c0 | 86 | module_param(crc_enabled, int, 0644); |
b038ced7 SW |
87 | MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)"); |
88 | ||
89 | static int rcv_win = 256 * 1024; | |
e54664c0 | 90 | module_param(rcv_win, int, 0644); |
b038ced7 SW |
91 | MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256)"); |
92 | ||
93 | static int snd_win = 32 * 1024; | |
e54664c0 | 94 | module_param(snd_win, int, 0644); |
b038ced7 SW |
95 | MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)"); |
96 | ||
97 | static unsigned int nocong = 0; | |
e54664c0 | 98 | module_param(nocong, uint, 0644); |
b038ced7 SW |
99 | MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)"); |
100 | ||
101 | static unsigned int cong_flavor = 1; | |
e54664c0 | 102 | module_param(cong_flavor, uint, 0644); |
b038ced7 SW |
103 | MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)"); |
104 | ||
b038ced7 | 105 | static struct workqueue_struct *workq; |
b038ced7 SW |
106 | |
107 | static struct sk_buff_head rxq; | |
b038ced7 SW |
108 | |
109 | static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp); | |
110 | static void ep_timeout(unsigned long arg); | |
111 | static void connect_reply_upcall(struct iwch_ep *ep, int status); | |
112 | ||
113 | static void start_ep_timer(struct iwch_ep *ep) | |
114 | { | |
33718363 | 115 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 | 116 | if (timer_pending(&ep->timer)) { |
33718363 | 117 | PDBG("%s stopped / restarted timer ep %p\n", __func__, ep); |
b038ced7 SW |
118 | del_timer_sync(&ep->timer); |
119 | } else | |
120 | get_ep(&ep->com); | |
121 | ep->timer.expires = jiffies + ep_timeout_secs * HZ; | |
122 | ep->timer.data = (unsigned long)ep; | |
123 | ep->timer.function = ep_timeout; | |
124 | add_timer(&ep->timer); | |
125 | } | |
126 | ||
127 | static void stop_ep_timer(struct iwch_ep *ep) | |
128 | { | |
33718363 | 129 | PDBG("%s ep %p\n", __func__, ep); |
989a1780 SW |
130 | if (!timer_pending(&ep->timer)) { |
131 | printk(KERN_ERR "%s timer stopped when its not running! ep %p state %u\n", | |
132 | __func__, ep, ep->com.state); | |
133 | WARN_ON(1); | |
134 | return; | |
135 | } | |
b038ced7 SW |
136 | del_timer_sync(&ep->timer); |
137 | put_ep(&ep->com); | |
138 | } | |
139 | ||
18199f57 | 140 | static int iwch_l2t_send(struct t3cdev *tdev, struct sk_buff *skb, struct l2t_entry *l2e) |
04b5d028 SW |
141 | { |
142 | int error = 0; | |
143 | struct cxio_rdev *rdev; | |
144 | ||
145 | rdev = (struct cxio_rdev *)tdev->ulp; | |
146 | if (cxio_fatal_error(rdev)) { | |
147 | kfree_skb(skb); | |
148 | return -EIO; | |
149 | } | |
150 | error = l2t_send(tdev, skb, l2e); | |
73a203d2 | 151 | if (error < 0) |
04b5d028 SW |
152 | kfree_skb(skb); |
153 | return error; | |
154 | } | |
155 | ||
156 | int iwch_cxgb3_ofld_send(struct t3cdev *tdev, struct sk_buff *skb) | |
157 | { | |
158 | int error = 0; | |
159 | struct cxio_rdev *rdev; | |
160 | ||
161 | rdev = (struct cxio_rdev *)tdev->ulp; | |
162 | if (cxio_fatal_error(rdev)) { | |
163 | kfree_skb(skb); | |
164 | return -EIO; | |
165 | } | |
166 | error = cxgb3_ofld_send(tdev, skb); | |
73a203d2 | 167 | if (error < 0) |
04b5d028 SW |
168 | kfree_skb(skb); |
169 | return error; | |
170 | } | |
171 | ||
b038ced7 SW |
172 | static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb) |
173 | { | |
174 | struct cpl_tid_release *req; | |
175 | ||
176 | skb = get_skb(skb, sizeof *req, GFP_KERNEL); | |
177 | if (!skb) | |
178 | return; | |
179 | req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req)); | |
180 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
181 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid)); | |
182 | skb->priority = CPL_PRIORITY_SETUP; | |
04b5d028 | 183 | iwch_cxgb3_ofld_send(tdev, skb); |
b038ced7 SW |
184 | return; |
185 | } | |
186 | ||
187 | int iwch_quiesce_tid(struct iwch_ep *ep) | |
188 | { | |
189 | struct cpl_set_tcb_field *req; | |
190 | struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
191 | ||
192 | if (!skb) | |
193 | return -ENOMEM; | |
194 | req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); | |
195 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
196 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
197 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); | |
198 | req->reply = 0; | |
199 | req->cpu_idx = 0; | |
200 | req->word = htons(W_TCB_RX_QUIESCE); | |
201 | req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); | |
202 | req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE); | |
203 | ||
204 | skb->priority = CPL_PRIORITY_DATA; | |
04b5d028 | 205 | return iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
206 | } |
207 | ||
208 | int iwch_resume_tid(struct iwch_ep *ep) | |
209 | { | |
210 | struct cpl_set_tcb_field *req; | |
211 | struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
212 | ||
213 | if (!skb) | |
214 | return -ENOMEM; | |
215 | req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); | |
216 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
217 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
218 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); | |
219 | req->reply = 0; | |
220 | req->cpu_idx = 0; | |
221 | req->word = htons(W_TCB_RX_QUIESCE); | |
222 | req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); | |
223 | req->val = 0; | |
224 | ||
225 | skb->priority = CPL_PRIORITY_DATA; | |
04b5d028 | 226 | return iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
227 | } |
228 | ||
229 | static void set_emss(struct iwch_ep *ep, u16 opt) | |
230 | { | |
33718363 | 231 | PDBG("%s ep %p opt %u\n", __func__, ep, opt); |
b038ced7 SW |
232 | ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40; |
233 | if (G_TCPOPT_TSTAMP(opt)) | |
234 | ep->emss -= 12; | |
235 | if (ep->emss < 128) | |
236 | ep->emss = 128; | |
237 | PDBG("emss=%d\n", ep->emss); | |
238 | } | |
239 | ||
240 | static enum iwch_ep_state state_read(struct iwch_ep_common *epc) | |
241 | { | |
242 | unsigned long flags; | |
243 | enum iwch_ep_state state; | |
244 | ||
245 | spin_lock_irqsave(&epc->lock, flags); | |
246 | state = epc->state; | |
247 | spin_unlock_irqrestore(&epc->lock, flags); | |
248 | return state; | |
249 | } | |
250 | ||
2b540355 | 251 | static void __state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) |
b038ced7 SW |
252 | { |
253 | epc->state = new; | |
254 | } | |
255 | ||
256 | static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) | |
257 | { | |
258 | unsigned long flags; | |
259 | ||
260 | spin_lock_irqsave(&epc->lock, flags); | |
33718363 | 261 | PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]); |
b038ced7 SW |
262 | __state_set(epc, new); |
263 | spin_unlock_irqrestore(&epc->lock, flags); | |
264 | return; | |
265 | } | |
266 | ||
267 | static void *alloc_ep(int size, gfp_t gfp) | |
268 | { | |
269 | struct iwch_ep_common *epc; | |
270 | ||
dd00cc48 | 271 | epc = kzalloc(size, gfp); |
b038ced7 | 272 | if (epc) { |
b038ced7 SW |
273 | kref_init(&epc->kref); |
274 | spin_lock_init(&epc->lock); | |
275 | init_waitqueue_head(&epc->waitq); | |
276 | } | |
33718363 | 277 | PDBG("%s alloc ep %p\n", __func__, epc); |
b038ced7 SW |
278 | return epc; |
279 | } | |
280 | ||
281 | void __free_ep(struct kref *kref) | |
282 | { | |
874d8df5 SW |
283 | struct iwch_ep *ep; |
284 | ep = container_of(container_of(kref, struct iwch_ep_common, kref), | |
285 | struct iwch_ep, com); | |
286 | PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]); | |
6e47fe43 | 287 | if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) { |
874d8df5 SW |
288 | cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid); |
289 | dst_release(ep->dst); | |
290 | l2t_release(L2DATA(ep->com.tdev), ep->l2t); | |
291 | } | |
292 | kfree(ep); | |
b038ced7 SW |
293 | } |
294 | ||
295 | static void release_ep_resources(struct iwch_ep *ep) | |
296 | { | |
33718363 | 297 | PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
6e47fe43 | 298 | set_bit(RELEASE_RESOURCES, &ep->com.flags); |
b038ced7 SW |
299 | put_ep(&ep->com); |
300 | } | |
301 | ||
b038ced7 SW |
302 | static int status2errno(int status) |
303 | { | |
304 | switch (status) { | |
305 | case CPL_ERR_NONE: | |
306 | return 0; | |
307 | case CPL_ERR_CONN_RESET: | |
308 | return -ECONNRESET; | |
309 | case CPL_ERR_ARP_MISS: | |
310 | return -EHOSTUNREACH; | |
311 | case CPL_ERR_CONN_TIMEDOUT: | |
312 | return -ETIMEDOUT; | |
313 | case CPL_ERR_TCAM_FULL: | |
314 | return -ENOMEM; | |
315 | case CPL_ERR_CONN_EXIST: | |
316 | return -EADDRINUSE; | |
317 | default: | |
318 | return -EIO; | |
319 | } | |
320 | } | |
321 | ||
322 | /* | |
323 | * Try and reuse skbs already allocated... | |
324 | */ | |
325 | static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp) | |
326 | { | |
1f6a849b | 327 | if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) { |
b038ced7 SW |
328 | skb_trim(skb, 0); |
329 | skb_get(skb); | |
330 | } else { | |
331 | skb = alloc_skb(len, gfp); | |
332 | } | |
333 | return skb; | |
334 | } | |
335 | ||
336 | static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip, | |
337 | __be32 peer_ip, __be16 local_port, | |
338 | __be16 peer_port, u8 tos) | |
339 | { | |
340 | struct rtable *rt; | |
341 | struct flowi fl = { | |
342 | .oif = 0, | |
343 | .nl_u = { | |
344 | .ip4_u = { | |
345 | .daddr = peer_ip, | |
346 | .saddr = local_ip, | |
347 | .tos = tos} | |
348 | }, | |
349 | .proto = IPPROTO_TCP, | |
350 | .uli_u = { | |
351 | .ports = { | |
352 | .sport = local_port, | |
353 | .dport = peer_port} | |
354 | } | |
355 | }; | |
356 | ||
f1b050bf | 357 | if (ip_route_output_flow(&init_net, &rt, &fl, NULL, 0)) |
b038ced7 SW |
358 | return NULL; |
359 | return rt; | |
360 | } | |
361 | ||
362 | static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu) | |
363 | { | |
364 | int i = 0; | |
365 | ||
366 | while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu) | |
367 | ++i; | |
368 | return i; | |
369 | } | |
370 | ||
371 | static void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb) | |
372 | { | |
33718363 | 373 | PDBG("%s t3cdev %p\n", __func__, dev); |
b038ced7 SW |
374 | kfree_skb(skb); |
375 | } | |
376 | ||
377 | /* | |
378 | * Handle an ARP failure for an active open. | |
379 | */ | |
380 | static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb) | |
381 | { | |
382 | printk(KERN_ERR MOD "ARP failure duing connect\n"); | |
383 | kfree_skb(skb); | |
384 | } | |
385 | ||
386 | /* | |
387 | * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant | |
388 | * and send it along. | |
389 | */ | |
390 | static void abort_arp_failure(struct t3cdev *dev, struct sk_buff *skb) | |
391 | { | |
392 | struct cpl_abort_req *req = cplhdr(skb); | |
393 | ||
33718363 | 394 | PDBG("%s t3cdev %p\n", __func__, dev); |
b038ced7 | 395 | req->cmd = CPL_ABORT_NO_RST; |
04b5d028 | 396 | iwch_cxgb3_ofld_send(dev, skb); |
b038ced7 SW |
397 | } |
398 | ||
399 | static int send_halfclose(struct iwch_ep *ep, gfp_t gfp) | |
400 | { | |
401 | struct cpl_close_con_req *req; | |
402 | struct sk_buff *skb; | |
403 | ||
33718363 | 404 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
405 | skb = get_skb(NULL, sizeof(*req), gfp); |
406 | if (!skb) { | |
33718363 | 407 | printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); |
b038ced7 SW |
408 | return -ENOMEM; |
409 | } | |
410 | skb->priority = CPL_PRIORITY_DATA; | |
411 | set_arp_failure_handler(skb, arp_failure_discard); | |
412 | req = (struct cpl_close_con_req *) skb_put(skb, sizeof(*req)); | |
413 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); | |
414 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
415 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid)); | |
04b5d028 | 416 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
417 | } |
418 | ||
419 | static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) | |
420 | { | |
421 | struct cpl_abort_req *req; | |
422 | ||
33718363 | 423 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
424 | skb = get_skb(skb, sizeof(*req), gfp); |
425 | if (!skb) { | |
426 | printk(KERN_ERR MOD "%s - failed to alloc skb.\n", | |
33718363 | 427 | __func__); |
b038ced7 SW |
428 | return -ENOMEM; |
429 | } | |
430 | skb->priority = CPL_PRIORITY_DATA; | |
431 | set_arp_failure_handler(skb, abort_arp_failure); | |
432 | req = (struct cpl_abort_req *) skb_put(skb, sizeof(*req)); | |
433 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); | |
434 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
435 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid)); | |
436 | req->cmd = CPL_ABORT_SEND_RST; | |
04b5d028 | 437 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
438 | } |
439 | ||
440 | static int send_connect(struct iwch_ep *ep) | |
441 | { | |
442 | struct cpl_act_open_req *req; | |
443 | struct sk_buff *skb; | |
444 | u32 opt0h, opt0l, opt2; | |
445 | unsigned int mtu_idx; | |
446 | int wscale; | |
447 | ||
33718363 | 448 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
449 | |
450 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
451 | if (!skb) { | |
452 | printk(KERN_ERR MOD "%s - failed to alloc skb.\n", | |
33718363 | 453 | __func__); |
b038ced7 SW |
454 | return -ENOMEM; |
455 | } | |
456 | mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); | |
457 | wscale = compute_wscale(rcv_win); | |
458 | opt0h = V_NAGLE(0) | | |
459 | V_NO_CONG(nocong) | | |
460 | V_KEEP_ALIVE(1) | | |
461 | F_TCAM_BYPASS | | |
462 | V_WND_SCALE(wscale) | | |
463 | V_MSS_IDX(mtu_idx) | | |
464 | V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); | |
465 | opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); | |
bec658ff SW |
466 | opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) | |
467 | V_CONG_CONTROL_FLAVOR(cong_flavor); | |
b038ced7 SW |
468 | skb->priority = CPL_PRIORITY_SETUP; |
469 | set_arp_failure_handler(skb, act_open_req_arp_failure); | |
470 | ||
471 | req = (struct cpl_act_open_req *) skb_put(skb, sizeof(*req)); | |
472 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
473 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ep->atid)); | |
474 | req->local_port = ep->com.local_addr.sin_port; | |
475 | req->peer_port = ep->com.remote_addr.sin_port; | |
476 | req->local_ip = ep->com.local_addr.sin_addr.s_addr; | |
477 | req->peer_ip = ep->com.remote_addr.sin_addr.s_addr; | |
478 | req->opt0h = htonl(opt0h); | |
479 | req->opt0l = htonl(opt0l); | |
480 | req->params = 0; | |
481 | req->opt2 = htonl(opt2); | |
04b5d028 | 482 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
483 | } |
484 | ||
485 | static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb) | |
486 | { | |
487 | int mpalen; | |
488 | struct tx_data_wr *req; | |
489 | struct mpa_message *mpa; | |
490 | int len; | |
491 | ||
33718363 | 492 | PDBG("%s ep %p pd_len %d\n", __func__, ep, ep->plen); |
b038ced7 SW |
493 | |
494 | BUG_ON(skb_cloned(skb)); | |
495 | ||
496 | mpalen = sizeof(*mpa) + ep->plen; | |
4305b541 | 497 | if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) { |
b038ced7 SW |
498 | kfree_skb(skb); |
499 | skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL); | |
500 | if (!skb) { | |
501 | connect_reply_upcall(ep, -ENOMEM); | |
502 | return; | |
503 | } | |
504 | } | |
505 | skb_trim(skb, 0); | |
506 | skb_reserve(skb, sizeof(*req)); | |
507 | skb_put(skb, mpalen); | |
508 | skb->priority = CPL_PRIORITY_DATA; | |
509 | mpa = (struct mpa_message *) skb->data; | |
510 | memset(mpa, 0, sizeof(*mpa)); | |
511 | memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)); | |
512 | mpa->flags = (crc_enabled ? MPA_CRC : 0) | | |
513 | (markers_enabled ? MPA_MARKERS : 0); | |
514 | mpa->private_data_size = htons(ep->plen); | |
515 | mpa->revision = mpa_rev; | |
516 | ||
517 | if (ep->plen) | |
518 | memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen); | |
519 | ||
520 | /* | |
521 | * Reference the mpa skb. This ensures the data area | |
522 | * will remain in memory until the hw acks the tx. | |
523 | * Function tx_ack() will deref it. | |
524 | */ | |
525 | skb_get(skb); | |
526 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 527 | skb_reset_transport_header(skb); |
b038ced7 SW |
528 | len = skb->len; |
529 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); | |
f8b0dfd1 | 530 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); |
b038ced7 SW |
531 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
532 | req->len = htonl(len); | |
533 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
534 | V_TX_SNDBUF(snd_win>>15)); | |
de3d3530 | 535 | req->flags = htonl(F_TX_INIT); |
b038ced7 SW |
536 | req->sndseq = htonl(ep->snd_seq); |
537 | BUG_ON(ep->mpa_skb); | |
538 | ep->mpa_skb = skb; | |
04b5d028 | 539 | iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
540 | start_ep_timer(ep); |
541 | state_set(&ep->com, MPA_REQ_SENT); | |
542 | return; | |
543 | } | |
544 | ||
545 | static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen) | |
546 | { | |
547 | int mpalen; | |
548 | struct tx_data_wr *req; | |
549 | struct mpa_message *mpa; | |
550 | struct sk_buff *skb; | |
551 | ||
33718363 | 552 | PDBG("%s ep %p plen %d\n", __func__, ep, plen); |
b038ced7 SW |
553 | |
554 | mpalen = sizeof(*mpa) + plen; | |
555 | ||
556 | skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); | |
557 | if (!skb) { | |
33718363 | 558 | printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); |
b038ced7 SW |
559 | return -ENOMEM; |
560 | } | |
561 | skb_reserve(skb, sizeof(*req)); | |
562 | mpa = (struct mpa_message *) skb_put(skb, mpalen); | |
563 | memset(mpa, 0, sizeof(*mpa)); | |
564 | memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); | |
565 | mpa->flags = MPA_REJECT; | |
566 | mpa->revision = mpa_rev; | |
567 | mpa->private_data_size = htons(plen); | |
568 | if (plen) | |
569 | memcpy(mpa->private_data, pdata, plen); | |
570 | ||
571 | /* | |
572 | * Reference the mpa skb again. This ensures the data area | |
573 | * will remain in memory until the hw acks the tx. | |
574 | * Function tx_ack() will deref it. | |
575 | */ | |
576 | skb_get(skb); | |
577 | skb->priority = CPL_PRIORITY_DATA; | |
578 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 579 | skb_reset_transport_header(skb); |
b038ced7 | 580 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); |
f8b0dfd1 | 581 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); |
b038ced7 SW |
582 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
583 | req->len = htonl(mpalen); | |
584 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
585 | V_TX_SNDBUF(snd_win>>15)); | |
de3d3530 | 586 | req->flags = htonl(F_TX_INIT); |
b038ced7 SW |
587 | req->sndseq = htonl(ep->snd_seq); |
588 | BUG_ON(ep->mpa_skb); | |
589 | ep->mpa_skb = skb; | |
04b5d028 | 590 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
591 | } |
592 | ||
593 | static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen) | |
594 | { | |
595 | int mpalen; | |
596 | struct tx_data_wr *req; | |
597 | struct mpa_message *mpa; | |
598 | int len; | |
599 | struct sk_buff *skb; | |
600 | ||
33718363 | 601 | PDBG("%s ep %p plen %d\n", __func__, ep, plen); |
b038ced7 SW |
602 | |
603 | mpalen = sizeof(*mpa) + plen; | |
604 | ||
605 | skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); | |
606 | if (!skb) { | |
33718363 | 607 | printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); |
b038ced7 SW |
608 | return -ENOMEM; |
609 | } | |
610 | skb->priority = CPL_PRIORITY_DATA; | |
611 | skb_reserve(skb, sizeof(*req)); | |
612 | mpa = (struct mpa_message *) skb_put(skb, mpalen); | |
613 | memset(mpa, 0, sizeof(*mpa)); | |
614 | memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); | |
615 | mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) | | |
616 | (markers_enabled ? MPA_MARKERS : 0); | |
617 | mpa->revision = mpa_rev; | |
618 | mpa->private_data_size = htons(plen); | |
619 | if (plen) | |
620 | memcpy(mpa->private_data, pdata, plen); | |
621 | ||
622 | /* | |
623 | * Reference the mpa skb. This ensures the data area | |
624 | * will remain in memory until the hw acks the tx. | |
625 | * Function tx_ack() will deref it. | |
626 | */ | |
627 | skb_get(skb); | |
628 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 629 | skb_reset_transport_header(skb); |
b038ced7 SW |
630 | len = skb->len; |
631 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); | |
f8b0dfd1 | 632 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); |
b038ced7 SW |
633 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
634 | req->len = htonl(len); | |
635 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
636 | V_TX_SNDBUF(snd_win>>15)); | |
de3d3530 | 637 | req->flags = htonl(F_TX_INIT); |
b038ced7 SW |
638 | req->sndseq = htonl(ep->snd_seq); |
639 | ep->mpa_skb = skb; | |
640 | state_set(&ep->com, MPA_REP_SENT); | |
04b5d028 | 641 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
642 | } |
643 | ||
644 | static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
645 | { | |
646 | struct iwch_ep *ep = ctx; | |
647 | struct cpl_act_establish *req = cplhdr(skb); | |
648 | unsigned int tid = GET_TID(req); | |
649 | ||
33718363 | 650 | PDBG("%s ep %p tid %d\n", __func__, ep, tid); |
b038ced7 SW |
651 | |
652 | dst_confirm(ep->dst); | |
653 | ||
654 | /* setup the hwtid for this connection */ | |
655 | ep->hwtid = tid; | |
656 | cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid); | |
657 | ||
658 | ep->snd_seq = ntohl(req->snd_isn); | |
de3d3530 | 659 | ep->rcv_seq = ntohl(req->rcv_isn); |
b038ced7 SW |
660 | |
661 | set_emss(ep, ntohs(req->tcp_opt)); | |
662 | ||
663 | /* dealloc the atid */ | |
664 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
665 | ||
666 | /* start MPA negotiation */ | |
667 | send_mpa_req(ep, skb); | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) | |
673 | { | |
674 | PDBG("%s ep %p\n", __FILE__, ep); | |
675 | state_set(&ep->com, ABORTING); | |
676 | send_abort(ep, skb, gfp); | |
677 | } | |
678 | ||
679 | static void close_complete_upcall(struct iwch_ep *ep) | |
680 | { | |
681 | struct iw_cm_event event; | |
682 | ||
33718363 | 683 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
684 | memset(&event, 0, sizeof(event)); |
685 | event.event = IW_CM_EVENT_CLOSE; | |
686 | if (ep->com.cm_id) { | |
687 | PDBG("close complete delivered ep %p cm_id %p tid %d\n", | |
688 | ep, ep->com.cm_id, ep->hwtid); | |
689 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
690 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
691 | ep->com.cm_id = NULL; | |
692 | ep->com.qp = NULL; | |
693 | } | |
694 | } | |
695 | ||
696 | static void peer_close_upcall(struct iwch_ep *ep) | |
697 | { | |
698 | struct iw_cm_event event; | |
699 | ||
33718363 | 700 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
701 | memset(&event, 0, sizeof(event)); |
702 | event.event = IW_CM_EVENT_DISCONNECT; | |
703 | if (ep->com.cm_id) { | |
704 | PDBG("peer close delivered ep %p cm_id %p tid %d\n", | |
705 | ep, ep->com.cm_id, ep->hwtid); | |
706 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
707 | } | |
708 | } | |
709 | ||
710 | static void peer_abort_upcall(struct iwch_ep *ep) | |
711 | { | |
712 | struct iw_cm_event event; | |
713 | ||
33718363 | 714 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
715 | memset(&event, 0, sizeof(event)); |
716 | event.event = IW_CM_EVENT_CLOSE; | |
717 | event.status = -ECONNRESET; | |
718 | if (ep->com.cm_id) { | |
719 | PDBG("abort delivered ep %p cm_id %p tid %d\n", ep, | |
720 | ep->com.cm_id, ep->hwtid); | |
721 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
722 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
723 | ep->com.cm_id = NULL; | |
724 | ep->com.qp = NULL; | |
725 | } | |
726 | } | |
727 | ||
728 | static void connect_reply_upcall(struct iwch_ep *ep, int status) | |
729 | { | |
730 | struct iw_cm_event event; | |
731 | ||
33718363 | 732 | PDBG("%s ep %p status %d\n", __func__, ep, status); |
b038ced7 SW |
733 | memset(&event, 0, sizeof(event)); |
734 | event.event = IW_CM_EVENT_CONNECT_REPLY; | |
735 | event.status = status; | |
736 | event.local_addr = ep->com.local_addr; | |
737 | event.remote_addr = ep->com.remote_addr; | |
738 | ||
739 | if ((status == 0) || (status == -ECONNREFUSED)) { | |
740 | event.private_data_len = ep->plen; | |
741 | event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); | |
742 | } | |
743 | if (ep->com.cm_id) { | |
33718363 | 744 | PDBG("%s ep %p tid %d status %d\n", __func__, ep, |
b038ced7 SW |
745 | ep->hwtid, status); |
746 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
747 | } | |
748 | if (status < 0) { | |
749 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
750 | ep->com.cm_id = NULL; | |
751 | ep->com.qp = NULL; | |
752 | } | |
753 | } | |
754 | ||
755 | static void connect_request_upcall(struct iwch_ep *ep) | |
756 | { | |
757 | struct iw_cm_event event; | |
758 | ||
33718363 | 759 | PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
b038ced7 SW |
760 | memset(&event, 0, sizeof(event)); |
761 | event.event = IW_CM_EVENT_CONNECT_REQUEST; | |
762 | event.local_addr = ep->com.local_addr; | |
763 | event.remote_addr = ep->com.remote_addr; | |
764 | event.private_data_len = ep->plen; | |
765 | event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); | |
766 | event.provider_data = ep; | |
6e47fe43 SW |
767 | if (state_read(&ep->parent_ep->com) != DEAD) { |
768 | get_ep(&ep->com); | |
b038ced7 SW |
769 | ep->parent_ep->com.cm_id->event_handler( |
770 | ep->parent_ep->com.cm_id, | |
771 | &event); | |
6e47fe43 | 772 | } |
b038ced7 SW |
773 | put_ep(&ep->parent_ep->com); |
774 | ep->parent_ep = NULL; | |
775 | } | |
776 | ||
777 | static void established_upcall(struct iwch_ep *ep) | |
778 | { | |
779 | struct iw_cm_event event; | |
780 | ||
33718363 | 781 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
782 | memset(&event, 0, sizeof(event)); |
783 | event.event = IW_CM_EVENT_ESTABLISHED; | |
784 | if (ep->com.cm_id) { | |
33718363 | 785 | PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
b038ced7 SW |
786 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
787 | } | |
788 | } | |
789 | ||
790 | static int update_rx_credits(struct iwch_ep *ep, u32 credits) | |
791 | { | |
792 | struct cpl_rx_data_ack *req; | |
793 | struct sk_buff *skb; | |
794 | ||
33718363 | 795 | PDBG("%s ep %p credits %u\n", __func__, ep, credits); |
b038ced7 SW |
796 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
797 | if (!skb) { | |
798 | printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n"); | |
799 | return 0; | |
800 | } | |
801 | ||
802 | req = (struct cpl_rx_data_ack *) skb_put(skb, sizeof(*req)); | |
803 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
804 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid)); | |
805 | req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1)); | |
806 | skb->priority = CPL_PRIORITY_ACK; | |
04b5d028 | 807 | iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
808 | return credits; |
809 | } | |
810 | ||
811 | static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb) | |
812 | { | |
813 | struct mpa_message *mpa; | |
814 | u16 plen; | |
815 | struct iwch_qp_attributes attrs; | |
816 | enum iwch_qp_attr_mask mask; | |
817 | int err; | |
818 | ||
33718363 | 819 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
820 | |
821 | /* | |
822 | * Stop mpa timer. If it expired, then the state has | |
823 | * changed and we bail since ep_timeout already aborted | |
824 | * the connection. | |
825 | */ | |
826 | stop_ep_timer(ep); | |
827 | if (state_read(&ep->com) != MPA_REQ_SENT) | |
828 | return; | |
829 | ||
830 | /* | |
831 | * If we get more than the supported amount of private data | |
832 | * then we must fail this connection. | |
833 | */ | |
834 | if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { | |
835 | err = -EINVAL; | |
836 | goto err; | |
837 | } | |
838 | ||
839 | /* | |
840 | * copy the new data into our accumulation buffer. | |
841 | */ | |
d626f62b ACM |
842 | skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), |
843 | skb->len); | |
b038ced7 SW |
844 | ep->mpa_pkt_len += skb->len; |
845 | ||
846 | /* | |
847 | * if we don't even have the mpa message, then bail. | |
848 | */ | |
849 | if (ep->mpa_pkt_len < sizeof(*mpa)) | |
850 | return; | |
851 | mpa = (struct mpa_message *) ep->mpa_pkt; | |
852 | ||
853 | /* Validate MPA header. */ | |
854 | if (mpa->revision != mpa_rev) { | |
855 | err = -EPROTO; | |
856 | goto err; | |
857 | } | |
858 | if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) { | |
859 | err = -EPROTO; | |
860 | goto err; | |
861 | } | |
862 | ||
863 | plen = ntohs(mpa->private_data_size); | |
864 | ||
865 | /* | |
866 | * Fail if there's too much private data. | |
867 | */ | |
868 | if (plen > MPA_MAX_PRIVATE_DATA) { | |
869 | err = -EPROTO; | |
870 | goto err; | |
871 | } | |
872 | ||
873 | /* | |
874 | * If plen does not account for pkt size | |
875 | */ | |
876 | if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { | |
877 | err = -EPROTO; | |
878 | goto err; | |
879 | } | |
880 | ||
881 | ep->plen = (u8) plen; | |
882 | ||
883 | /* | |
884 | * If we don't have all the pdata yet, then bail. | |
885 | * We'll continue process when more data arrives. | |
886 | */ | |
887 | if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) | |
888 | return; | |
889 | ||
890 | if (mpa->flags & MPA_REJECT) { | |
891 | err = -ECONNREFUSED; | |
892 | goto err; | |
893 | } | |
894 | ||
895 | /* | |
896 | * If we get here we have accumulated the entire mpa | |
897 | * start reply message including private data. And | |
898 | * the MPA header is valid. | |
899 | */ | |
900 | state_set(&ep->com, FPDU_MODE); | |
f8b0dfd1 | 901 | ep->mpa_attr.initiator = 1; |
b038ced7 SW |
902 | ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; |
903 | ep->mpa_attr.recv_marker_enabled = markers_enabled; | |
904 | ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; | |
905 | ep->mpa_attr.version = mpa_rev; | |
906 | PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " | |
33718363 | 907 | "xmit_marker_enabled=%d, version=%d\n", __func__, |
b038ced7 SW |
908 | ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, |
909 | ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); | |
910 | ||
911 | attrs.mpa_attr = ep->mpa_attr; | |
912 | attrs.max_ird = ep->ird; | |
913 | attrs.max_ord = ep->ord; | |
914 | attrs.llp_stream_handle = ep; | |
915 | attrs.next_state = IWCH_QP_STATE_RTS; | |
916 | ||
917 | mask = IWCH_QP_ATTR_NEXT_STATE | | |
918 | IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR | | |
919 | IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD; | |
920 | ||
921 | /* bind QP and TID with INIT_WR */ | |
922 | err = iwch_modify_qp(ep->com.qp->rhp, | |
923 | ep->com.qp, mask, &attrs, 1); | |
f8b0dfd1 SW |
924 | if (err) |
925 | goto err; | |
926 | ||
927 | if (peer2peer && iwch_rqes_posted(ep->com.qp) == 0) { | |
928 | iwch_post_zb_read(ep->com.qp); | |
929 | } | |
930 | ||
931 | goto out; | |
b038ced7 SW |
932 | err: |
933 | abort_connection(ep, skb, GFP_KERNEL); | |
934 | out: | |
935 | connect_reply_upcall(ep, err); | |
936 | return; | |
937 | } | |
938 | ||
939 | static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb) | |
940 | { | |
941 | struct mpa_message *mpa; | |
942 | u16 plen; | |
943 | ||
33718363 | 944 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
945 | |
946 | /* | |
947 | * Stop mpa timer. If it expired, then the state has | |
948 | * changed and we bail since ep_timeout already aborted | |
949 | * the connection. | |
950 | */ | |
951 | stop_ep_timer(ep); | |
952 | if (state_read(&ep->com) != MPA_REQ_WAIT) | |
953 | return; | |
954 | ||
955 | /* | |
956 | * If we get more than the supported amount of private data | |
957 | * then we must fail this connection. | |
958 | */ | |
959 | if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { | |
960 | abort_connection(ep, skb, GFP_KERNEL); | |
961 | return; | |
962 | } | |
963 | ||
33718363 | 964 | PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); |
b038ced7 SW |
965 | |
966 | /* | |
967 | * Copy the new data into our accumulation buffer. | |
968 | */ | |
d626f62b ACM |
969 | skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), |
970 | skb->len); | |
b038ced7 SW |
971 | ep->mpa_pkt_len += skb->len; |
972 | ||
973 | /* | |
974 | * If we don't even have the mpa message, then bail. | |
975 | * We'll continue process when more data arrives. | |
976 | */ | |
977 | if (ep->mpa_pkt_len < sizeof(*mpa)) | |
978 | return; | |
33718363 | 979 | PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); |
b038ced7 SW |
980 | mpa = (struct mpa_message *) ep->mpa_pkt; |
981 | ||
982 | /* | |
983 | * Validate MPA Header. | |
984 | */ | |
985 | if (mpa->revision != mpa_rev) { | |
986 | abort_connection(ep, skb, GFP_KERNEL); | |
987 | return; | |
988 | } | |
989 | ||
990 | if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) { | |
991 | abort_connection(ep, skb, GFP_KERNEL); | |
992 | return; | |
993 | } | |
994 | ||
995 | plen = ntohs(mpa->private_data_size); | |
996 | ||
997 | /* | |
998 | * Fail if there's too much private data. | |
999 | */ | |
1000 | if (plen > MPA_MAX_PRIVATE_DATA) { | |
1001 | abort_connection(ep, skb, GFP_KERNEL); | |
1002 | return; | |
1003 | } | |
1004 | ||
1005 | /* | |
1006 | * If plen does not account for pkt size | |
1007 | */ | |
1008 | if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { | |
1009 | abort_connection(ep, skb, GFP_KERNEL); | |
1010 | return; | |
1011 | } | |
1012 | ep->plen = (u8) plen; | |
1013 | ||
1014 | /* | |
1015 | * If we don't have all the pdata yet, then bail. | |
1016 | */ | |
1017 | if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) | |
1018 | return; | |
1019 | ||
1020 | /* | |
1021 | * If we get here we have accumulated the entire mpa | |
1022 | * start reply message including private data. | |
1023 | */ | |
f8b0dfd1 | 1024 | ep->mpa_attr.initiator = 0; |
b038ced7 SW |
1025 | ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; |
1026 | ep->mpa_attr.recv_marker_enabled = markers_enabled; | |
1027 | ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; | |
1028 | ep->mpa_attr.version = mpa_rev; | |
1029 | PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " | |
33718363 | 1030 | "xmit_marker_enabled=%d, version=%d\n", __func__, |
b038ced7 SW |
1031 | ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, |
1032 | ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); | |
1033 | ||
1034 | state_set(&ep->com, MPA_REQ_RCVD); | |
1035 | ||
1036 | /* drive upcall */ | |
1037 | connect_request_upcall(ep); | |
1038 | return; | |
1039 | } | |
1040 | ||
1041 | static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1042 | { | |
1043 | struct iwch_ep *ep = ctx; | |
1044 | struct cpl_rx_data *hdr = cplhdr(skb); | |
1045 | unsigned int dlen = ntohs(hdr->len); | |
1046 | ||
33718363 | 1047 | PDBG("%s ep %p dlen %u\n", __func__, ep, dlen); |
b038ced7 SW |
1048 | |
1049 | skb_pull(skb, sizeof(*hdr)); | |
1050 | skb_trim(skb, dlen); | |
1051 | ||
de3d3530 SW |
1052 | ep->rcv_seq += dlen; |
1053 | BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen)); | |
1054 | ||
b038ced7 SW |
1055 | switch (state_read(&ep->com)) { |
1056 | case MPA_REQ_SENT: | |
1057 | process_mpa_reply(ep, skb); | |
1058 | break; | |
1059 | case MPA_REQ_WAIT: | |
1060 | process_mpa_request(ep, skb); | |
1061 | break; | |
1062 | case MPA_REP_SENT: | |
1063 | break; | |
1064 | default: | |
1065 | printk(KERN_ERR MOD "%s Unexpected streaming data." | |
1066 | " ep %p state %d tid %d\n", | |
33718363 | 1067 | __func__, ep, state_read(&ep->com), ep->hwtid); |
b038ced7 SW |
1068 | |
1069 | /* | |
1070 | * The ep will timeout and inform the ULP of the failure. | |
1071 | * See ep_timeout(). | |
1072 | */ | |
1073 | break; | |
1074 | } | |
1075 | ||
1076 | /* update RX credits */ | |
1077 | update_rx_credits(ep, dlen); | |
1078 | ||
1079 | return CPL_RET_BUF_DONE; | |
1080 | } | |
1081 | ||
1082 | /* | |
1083 | * Upcall from the adapter indicating data has been transmitted. | |
1084 | * For us its just the single MPA request or reply. We can now free | |
1085 | * the skb holding the mpa message. | |
1086 | */ | |
1087 | static int tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1088 | { | |
1089 | struct iwch_ep *ep = ctx; | |
1090 | struct cpl_wr_ack *hdr = cplhdr(skb); | |
1091 | unsigned int credits = ntohs(hdr->credits); | |
b038ced7 | 1092 | |
33718363 | 1093 | PDBG("%s ep %p credits %u\n", __func__, ep, credits); |
b038ced7 | 1094 | |
f8b0dfd1 SW |
1095 | if (credits == 0) { |
1096 | PDBG(KERN_ERR "%s 0 credit ack ep %p state %u\n", | |
1097 | __func__, ep, state_read(&ep->com)); | |
b038ced7 | 1098 | return CPL_RET_BUF_DONE; |
f8b0dfd1 SW |
1099 | } |
1100 | ||
b038ced7 | 1101 | BUG_ON(credits != 1); |
b038ced7 | 1102 | dst_confirm(ep->dst); |
f8b0dfd1 SW |
1103 | if (!ep->mpa_skb) { |
1104 | PDBG("%s rdma_init wr_ack ep %p state %u\n", | |
1105 | __func__, ep, state_read(&ep->com)); | |
1106 | if (ep->mpa_attr.initiator) { | |
1107 | PDBG("%s initiator ep %p state %u\n", | |
1108 | __func__, ep, state_read(&ep->com)); | |
1109 | if (peer2peer) | |
1110 | iwch_post_zb_read(ep->com.qp); | |
1111 | } else { | |
1112 | PDBG("%s responder ep %p state %u\n", | |
1113 | __func__, ep, state_read(&ep->com)); | |
1114 | ep->com.rpl_done = 1; | |
1115 | wake_up(&ep->com.waitq); | |
1116 | } | |
1117 | } else { | |
1118 | PDBG("%s lsm ack ep %p state %u freeing skb\n", | |
1119 | __func__, ep, state_read(&ep->com)); | |
1120 | kfree_skb(ep->mpa_skb); | |
1121 | ep->mpa_skb = NULL; | |
b038ced7 SW |
1122 | } |
1123 | return CPL_RET_BUF_DONE; | |
1124 | } | |
1125 | ||
1126 | static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1127 | { | |
1128 | struct iwch_ep *ep = ctx; | |
989a1780 SW |
1129 | unsigned long flags; |
1130 | int release = 0; | |
b038ced7 | 1131 | |
33718363 | 1132 | PDBG("%s ep %p\n", __func__, ep); |
989a1780 | 1133 | BUG_ON(!ep); |
b038ced7 | 1134 | |
aff9e39d SW |
1135 | /* |
1136 | * We get 2 abort replies from the HW. The first one must | |
1137 | * be ignored except for scribbling that we need one more. | |
1138 | */ | |
6e47fe43 | 1139 | if (!test_and_set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags)) { |
aff9e39d SW |
1140 | return CPL_RET_BUF_DONE; |
1141 | } | |
1142 | ||
989a1780 SW |
1143 | spin_lock_irqsave(&ep->com.lock, flags); |
1144 | switch (ep->com.state) { | |
1145 | case ABORTING: | |
1146 | close_complete_upcall(ep); | |
1147 | __state_set(&ep->com, DEAD); | |
1148 | release = 1; | |
1149 | break; | |
1150 | default: | |
1151 | printk(KERN_ERR "%s ep %p state %d\n", | |
1152 | __func__, ep, ep->com.state); | |
1153 | break; | |
1154 | } | |
1155 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1156 | ||
1157 | if (release) | |
1158 | release_ep_resources(ep); | |
b038ced7 SW |
1159 | return CPL_RET_BUF_DONE; |
1160 | } | |
1161 | ||
96d0e493 SW |
1162 | /* |
1163 | * Return whether a failed active open has allocated a TID | |
1164 | */ | |
1165 | static inline int act_open_has_tid(int status) | |
1166 | { | |
1167 | return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST && | |
1168 | status != CPL_ERR_ARP_MISS; | |
1169 | } | |
1170 | ||
b038ced7 SW |
1171 | static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
1172 | { | |
1173 | struct iwch_ep *ep = ctx; | |
1174 | struct cpl_act_open_rpl *rpl = cplhdr(skb); | |
1175 | ||
33718363 | 1176 | PDBG("%s ep %p status %u errno %d\n", __func__, ep, rpl->status, |
b038ced7 SW |
1177 | status2errno(rpl->status)); |
1178 | connect_reply_upcall(ep, status2errno(rpl->status)); | |
1179 | state_set(&ep->com, DEAD); | |
8176d297 | 1180 | if (ep->com.tdev->type != T3A && act_open_has_tid(rpl->status)) |
b038ced7 SW |
1181 | release_tid(ep->com.tdev, GET_TID(rpl), NULL); |
1182 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
1183 | dst_release(ep->dst); | |
1184 | l2t_release(L2DATA(ep->com.tdev), ep->l2t); | |
1185 | put_ep(&ep->com); | |
1186 | return CPL_RET_BUF_DONE; | |
1187 | } | |
1188 | ||
1189 | static int listen_start(struct iwch_listen_ep *ep) | |
1190 | { | |
1191 | struct sk_buff *skb; | |
1192 | struct cpl_pass_open_req *req; | |
1193 | ||
33718363 | 1194 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1195 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
1196 | if (!skb) { | |
1197 | printk(KERN_ERR MOD "t3c_listen_start failed to alloc skb!\n"); | |
1198 | return -ENOMEM; | |
1199 | } | |
1200 | ||
1201 | req = (struct cpl_pass_open_req *) skb_put(skb, sizeof(*req)); | |
1202 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1203 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, ep->stid)); | |
1204 | req->local_port = ep->com.local_addr.sin_port; | |
1205 | req->local_ip = ep->com.local_addr.sin_addr.s_addr; | |
1206 | req->peer_port = 0; | |
1207 | req->peer_ip = 0; | |
1208 | req->peer_netmask = 0; | |
1209 | req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS); | |
1210 | req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10)); | |
1211 | req->opt1 = htonl(V_CONN_POLICY(CPL_CONN_POLICY_ASK)); | |
1212 | ||
1213 | skb->priority = 1; | |
04b5d028 | 1214 | return iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
1215 | } |
1216 | ||
1217 | static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1218 | { | |
1219 | struct iwch_listen_ep *ep = ctx; | |
1220 | struct cpl_pass_open_rpl *rpl = cplhdr(skb); | |
1221 | ||
33718363 | 1222 | PDBG("%s ep %p status %d error %d\n", __func__, ep, |
b038ced7 SW |
1223 | rpl->status, status2errno(rpl->status)); |
1224 | ep->com.rpl_err = status2errno(rpl->status); | |
1225 | ep->com.rpl_done = 1; | |
1226 | wake_up(&ep->com.waitq); | |
1227 | ||
1228 | return CPL_RET_BUF_DONE; | |
1229 | } | |
1230 | ||
1231 | static int listen_stop(struct iwch_listen_ep *ep) | |
1232 | { | |
1233 | struct sk_buff *skb; | |
1234 | struct cpl_close_listserv_req *req; | |
1235 | ||
33718363 | 1236 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1237 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
1238 | if (!skb) { | |
33718363 | 1239 | printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); |
b038ced7 SW |
1240 | return -ENOMEM; |
1241 | } | |
1242 | req = (struct cpl_close_listserv_req *) skb_put(skb, sizeof(*req)); | |
1243 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
60be4b59 | 1244 | req->cpu_idx = 0; |
b038ced7 SW |
1245 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid)); |
1246 | skb->priority = 1; | |
04b5d028 | 1247 | return iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
1248 | } |
1249 | ||
1250 | static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb, | |
1251 | void *ctx) | |
1252 | { | |
1253 | struct iwch_listen_ep *ep = ctx; | |
1254 | struct cpl_close_listserv_rpl *rpl = cplhdr(skb); | |
1255 | ||
33718363 | 1256 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1257 | ep->com.rpl_err = status2errno(rpl->status); |
1258 | ep->com.rpl_done = 1; | |
1259 | wake_up(&ep->com.waitq); | |
1260 | return CPL_RET_BUF_DONE; | |
1261 | } | |
1262 | ||
1263 | static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb) | |
1264 | { | |
1265 | struct cpl_pass_accept_rpl *rpl; | |
1266 | unsigned int mtu_idx; | |
1267 | u32 opt0h, opt0l, opt2; | |
1268 | int wscale; | |
1269 | ||
33718363 | 1270 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1271 | BUG_ON(skb_cloned(skb)); |
1272 | skb_trim(skb, sizeof(*rpl)); | |
1273 | skb_get(skb); | |
1274 | mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); | |
1275 | wscale = compute_wscale(rcv_win); | |
1276 | opt0h = V_NAGLE(0) | | |
1277 | V_NO_CONG(nocong) | | |
1278 | V_KEEP_ALIVE(1) | | |
1279 | F_TCAM_BYPASS | | |
1280 | V_WND_SCALE(wscale) | | |
1281 | V_MSS_IDX(mtu_idx) | | |
1282 | V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); | |
1283 | opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); | |
bec658ff SW |
1284 | opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) | |
1285 | V_CONG_CONTROL_FLAVOR(cong_flavor); | |
b038ced7 SW |
1286 | |
1287 | rpl = cplhdr(skb); | |
1288 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1289 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid)); | |
1290 | rpl->peer_ip = peer_ip; | |
1291 | rpl->opt0h = htonl(opt0h); | |
1292 | rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT); | |
1293 | rpl->opt2 = htonl(opt2); | |
1294 | rpl->rsvd = rpl->opt2; /* workaround for HW bug */ | |
1295 | skb->priority = CPL_PRIORITY_SETUP; | |
04b5d028 | 1296 | iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
1297 | |
1298 | return; | |
1299 | } | |
1300 | ||
1301 | static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip, | |
1302 | struct sk_buff *skb) | |
1303 | { | |
33718363 | 1304 | PDBG("%s t3cdev %p tid %u peer_ip %x\n", __func__, tdev, hwtid, |
b038ced7 SW |
1305 | peer_ip); |
1306 | BUG_ON(skb_cloned(skb)); | |
1307 | skb_trim(skb, sizeof(struct cpl_tid_release)); | |
1308 | skb_get(skb); | |
1309 | ||
8176d297 | 1310 | if (tdev->type != T3A) |
b038ced7 SW |
1311 | release_tid(tdev, hwtid, skb); |
1312 | else { | |
1313 | struct cpl_pass_accept_rpl *rpl; | |
1314 | ||
1315 | rpl = cplhdr(skb); | |
1316 | skb->priority = CPL_PRIORITY_SETUP; | |
1317 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1318 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, | |
1319 | hwtid)); | |
1320 | rpl->peer_ip = peer_ip; | |
1321 | rpl->opt0h = htonl(F_TCAM_BYPASS); | |
1322 | rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT); | |
1323 | rpl->opt2 = 0; | |
1324 | rpl->rsvd = rpl->opt2; | |
04b5d028 | 1325 | iwch_cxgb3_ofld_send(tdev, skb); |
b038ced7 SW |
1326 | } |
1327 | } | |
1328 | ||
1329 | static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1330 | { | |
1331 | struct iwch_ep *child_ep, *parent_ep = ctx; | |
1332 | struct cpl_pass_accept_req *req = cplhdr(skb); | |
1333 | unsigned int hwtid = GET_TID(req); | |
1334 | struct dst_entry *dst; | |
1335 | struct l2t_entry *l2t; | |
1336 | struct rtable *rt; | |
1337 | struct iff_mac tim; | |
1338 | ||
33718363 | 1339 | PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid); |
b038ced7 SW |
1340 | |
1341 | if (state_read(&parent_ep->com) != LISTEN) { | |
1342 | printk(KERN_ERR "%s - listening ep not in LISTEN\n", | |
33718363 | 1343 | __func__); |
b038ced7 SW |
1344 | goto reject; |
1345 | } | |
1346 | ||
1347 | /* | |
1348 | * Find the netdev for this connection request. | |
1349 | */ | |
1350 | tim.mac_addr = req->dst_mac; | |
1351 | tim.vlan_tag = ntohs(req->vlan_tag); | |
1352 | if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) { | |
eacc4d6a HS |
1353 | printk(KERN_ERR "%s bad dst mac %pM\n", |
1354 | __func__, req->dst_mac); | |
b038ced7 SW |
1355 | goto reject; |
1356 | } | |
1357 | ||
1358 | /* Find output route */ | |
1359 | rt = find_route(tdev, | |
1360 | req->local_ip, | |
1361 | req->peer_ip, | |
1362 | req->local_port, | |
1363 | req->peer_port, G_PASS_OPEN_TOS(ntohl(req->tos_tid))); | |
1364 | if (!rt) { | |
1365 | printk(KERN_ERR MOD "%s - failed to find dst entry!\n", | |
33718363 | 1366 | __func__); |
b038ced7 SW |
1367 | goto reject; |
1368 | } | |
d8d1f30b | 1369 | dst = &rt->dst; |
b038ced7 SW |
1370 | l2t = t3_l2t_get(tdev, dst->neighbour, dst->neighbour->dev); |
1371 | if (!l2t) { | |
1372 | printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n", | |
33718363 | 1373 | __func__); |
b038ced7 SW |
1374 | dst_release(dst); |
1375 | goto reject; | |
1376 | } | |
1377 | child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL); | |
1378 | if (!child_ep) { | |
1379 | printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n", | |
33718363 | 1380 | __func__); |
b038ced7 SW |
1381 | l2t_release(L2DATA(tdev), l2t); |
1382 | dst_release(dst); | |
1383 | goto reject; | |
1384 | } | |
1385 | state_set(&child_ep->com, CONNECTING); | |
1386 | child_ep->com.tdev = tdev; | |
1387 | child_ep->com.cm_id = NULL; | |
1388 | child_ep->com.local_addr.sin_family = PF_INET; | |
1389 | child_ep->com.local_addr.sin_port = req->local_port; | |
1390 | child_ep->com.local_addr.sin_addr.s_addr = req->local_ip; | |
1391 | child_ep->com.remote_addr.sin_family = PF_INET; | |
1392 | child_ep->com.remote_addr.sin_port = req->peer_port; | |
1393 | child_ep->com.remote_addr.sin_addr.s_addr = req->peer_ip; | |
1394 | get_ep(&parent_ep->com); | |
1395 | child_ep->parent_ep = parent_ep; | |
1396 | child_ep->tos = G_PASS_OPEN_TOS(ntohl(req->tos_tid)); | |
1397 | child_ep->l2t = l2t; | |
1398 | child_ep->dst = dst; | |
1399 | child_ep->hwtid = hwtid; | |
1400 | init_timer(&child_ep->timer); | |
1401 | cxgb3_insert_tid(tdev, &t3c_client, child_ep, hwtid); | |
1402 | accept_cr(child_ep, req->peer_ip, skb); | |
1403 | goto out; | |
1404 | reject: | |
1405 | reject_cr(tdev, hwtid, req->peer_ip, skb); | |
1406 | out: | |
1407 | return CPL_RET_BUF_DONE; | |
1408 | } | |
1409 | ||
1410 | static int pass_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1411 | { | |
1412 | struct iwch_ep *ep = ctx; | |
1413 | struct cpl_pass_establish *req = cplhdr(skb); | |
1414 | ||
33718363 | 1415 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 | 1416 | ep->snd_seq = ntohl(req->snd_isn); |
de3d3530 | 1417 | ep->rcv_seq = ntohl(req->rcv_isn); |
b038ced7 SW |
1418 | |
1419 | set_emss(ep, ntohs(req->tcp_opt)); | |
1420 | ||
1421 | dst_confirm(ep->dst); | |
1422 | state_set(&ep->com, MPA_REQ_WAIT); | |
1423 | start_ep_timer(ep); | |
1424 | ||
1425 | return CPL_RET_BUF_DONE; | |
1426 | } | |
1427 | ||
1428 | static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1429 | { | |
1430 | struct iwch_ep *ep = ctx; | |
1431 | struct iwch_qp_attributes attrs; | |
1432 | unsigned long flags; | |
1433 | int disconnect = 1; | |
1434 | int release = 0; | |
1435 | ||
33718363 | 1436 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1437 | dst_confirm(ep->dst); |
1438 | ||
1439 | spin_lock_irqsave(&ep->com.lock, flags); | |
1440 | switch (ep->com.state) { | |
1441 | case MPA_REQ_WAIT: | |
1442 | __state_set(&ep->com, CLOSING); | |
1443 | break; | |
1444 | case MPA_REQ_SENT: | |
1445 | __state_set(&ep->com, CLOSING); | |
1446 | connect_reply_upcall(ep, -ECONNRESET); | |
1447 | break; | |
1448 | case MPA_REQ_RCVD: | |
1449 | ||
1450 | /* | |
1451 | * We're gonna mark this puppy DEAD, but keep | |
1452 | * the reference on it until the ULP accepts or | |
a52bf98d SW |
1453 | * rejects the CR. Also wake up anyone waiting |
1454 | * in rdma connection migration (see iwch_accept_cr()). | |
b038ced7 SW |
1455 | */ |
1456 | __state_set(&ep->com, CLOSING); | |
a52bf98d SW |
1457 | ep->com.rpl_done = 1; |
1458 | ep->com.rpl_err = -ECONNRESET; | |
1459 | PDBG("waking up ep %p\n", ep); | |
1460 | wake_up(&ep->com.waitq); | |
b038ced7 SW |
1461 | break; |
1462 | case MPA_REP_SENT: | |
1463 | __state_set(&ep->com, CLOSING); | |
1464 | ep->com.rpl_done = 1; | |
1465 | ep->com.rpl_err = -ECONNRESET; | |
1466 | PDBG("waking up ep %p\n", ep); | |
1467 | wake_up(&ep->com.waitq); | |
1468 | break; | |
1469 | case FPDU_MODE: | |
42e31753 | 1470 | start_ep_timer(ep); |
b038ced7 SW |
1471 | __state_set(&ep->com, CLOSING); |
1472 | attrs.next_state = IWCH_QP_STATE_CLOSING; | |
1473 | iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, | |
1474 | IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); | |
1475 | peer_close_upcall(ep); | |
1476 | break; | |
1477 | case ABORTING: | |
1478 | disconnect = 0; | |
1479 | break; | |
1480 | case CLOSING: | |
b038ced7 SW |
1481 | __state_set(&ep->com, MORIBUND); |
1482 | disconnect = 0; | |
1483 | break; | |
1484 | case MORIBUND: | |
1485 | stop_ep_timer(ep); | |
1486 | if (ep->com.cm_id && ep->com.qp) { | |
1487 | attrs.next_state = IWCH_QP_STATE_IDLE; | |
1488 | iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, | |
1489 | IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); | |
1490 | } | |
1491 | close_complete_upcall(ep); | |
1492 | __state_set(&ep->com, DEAD); | |
1493 | release = 1; | |
1494 | disconnect = 0; | |
1495 | break; | |
1496 | case DEAD: | |
1497 | disconnect = 0; | |
1498 | break; | |
1499 | default: | |
1500 | BUG_ON(1); | |
1501 | } | |
1502 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1503 | if (disconnect) | |
1504 | iwch_ep_disconnect(ep, 0, GFP_KERNEL); | |
1505 | if (release) | |
1506 | release_ep_resources(ep); | |
1507 | return CPL_RET_BUF_DONE; | |
1508 | } | |
1509 | ||
1510 | /* | |
1511 | * Returns whether an ABORT_REQ_RSS message is a negative advice. | |
1512 | */ | |
2b540355 | 1513 | static int is_neg_adv_abort(unsigned int status) |
b038ced7 SW |
1514 | { |
1515 | return status == CPL_ERR_RTX_NEG_ADVICE || | |
1516 | status == CPL_ERR_PERSIST_NEG_ADVICE; | |
1517 | } | |
1518 | ||
1519 | static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1520 | { | |
1521 | struct cpl_abort_req_rss *req = cplhdr(skb); | |
1522 | struct iwch_ep *ep = ctx; | |
1523 | struct cpl_abort_rpl *rpl; | |
1524 | struct sk_buff *rpl_skb; | |
1525 | struct iwch_qp_attributes attrs; | |
1526 | int ret; | |
989a1780 SW |
1527 | int release = 0; |
1528 | unsigned long flags; | |
b038ced7 | 1529 | |
1580367e | 1530 | if (is_neg_adv_abort(req->status)) { |
33718363 | 1531 | PDBG("%s neg_adv_abort ep %p tid %d\n", __func__, ep, |
1580367e SW |
1532 | ep->hwtid); |
1533 | t3_l2t_send_event(ep->com.tdev, ep->l2t); | |
1534 | return CPL_RET_BUF_DONE; | |
1535 | } | |
1536 | ||
aff9e39d SW |
1537 | /* |
1538 | * We get 2 peer aborts from the HW. The first one must | |
1539 | * be ignored except for scribbling that we need one more. | |
1540 | */ | |
6e47fe43 | 1541 | if (!test_and_set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags)) { |
aff9e39d SW |
1542 | return CPL_RET_BUF_DONE; |
1543 | } | |
1544 | ||
989a1780 SW |
1545 | spin_lock_irqsave(&ep->com.lock, flags); |
1546 | PDBG("%s ep %p state %u\n", __func__, ep, ep->com.state); | |
1547 | switch (ep->com.state) { | |
b038ced7 SW |
1548 | case CONNECTING: |
1549 | break; | |
1550 | case MPA_REQ_WAIT: | |
adf376b3 | 1551 | stop_ep_timer(ep); |
b038ced7 SW |
1552 | break; |
1553 | case MPA_REQ_SENT: | |
adf376b3 | 1554 | stop_ep_timer(ep); |
b038ced7 SW |
1555 | connect_reply_upcall(ep, -ECONNRESET); |
1556 | break; | |
1557 | case MPA_REP_SENT: | |
1558 | ep->com.rpl_done = 1; | |
1559 | ep->com.rpl_err = -ECONNRESET; | |
1560 | PDBG("waking up ep %p\n", ep); | |
1561 | wake_up(&ep->com.waitq); | |
1562 | break; | |
1563 | case MPA_REQ_RCVD: | |
1564 | ||
1565 | /* | |
1566 | * We're gonna mark this puppy DEAD, but keep | |
1567 | * the reference on it until the ULP accepts or | |
a52bf98d SW |
1568 | * rejects the CR. Also wake up anyone waiting |
1569 | * in rdma connection migration (see iwch_accept_cr()). | |
b038ced7 | 1570 | */ |
a52bf98d SW |
1571 | ep->com.rpl_done = 1; |
1572 | ep->com.rpl_err = -ECONNRESET; | |
1573 | PDBG("waking up ep %p\n", ep); | |
1574 | wake_up(&ep->com.waitq); | |
b038ced7 SW |
1575 | break; |
1576 | case MORIBUND: | |
42e31753 | 1577 | case CLOSING: |
b038ced7 | 1578 | stop_ep_timer(ep); |
42e31753 | 1579 | /*FALLTHROUGH*/ |
b038ced7 | 1580 | case FPDU_MODE: |
b038ced7 SW |
1581 | if (ep->com.cm_id && ep->com.qp) { |
1582 | attrs.next_state = IWCH_QP_STATE_ERROR; | |
1583 | ret = iwch_modify_qp(ep->com.qp->rhp, | |
1584 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1585 | &attrs, 1); | |
1586 | if (ret) | |
1587 | printk(KERN_ERR MOD | |
1588 | "%s - qp <- error failed!\n", | |
33718363 | 1589 | __func__); |
b038ced7 SW |
1590 | } |
1591 | peer_abort_upcall(ep); | |
1592 | break; | |
1593 | case ABORTING: | |
1594 | break; | |
1595 | case DEAD: | |
33718363 | 1596 | PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__); |
989a1780 | 1597 | spin_unlock_irqrestore(&ep->com.lock, flags); |
b038ced7 SW |
1598 | return CPL_RET_BUF_DONE; |
1599 | default: | |
1600 | BUG_ON(1); | |
1601 | break; | |
1602 | } | |
1603 | dst_confirm(ep->dst); | |
989a1780 SW |
1604 | if (ep->com.state != ABORTING) { |
1605 | __state_set(&ep->com, DEAD); | |
1606 | release = 1; | |
1607 | } | |
1608 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
b038ced7 SW |
1609 | |
1610 | rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL); | |
1611 | if (!rpl_skb) { | |
1612 | printk(KERN_ERR MOD "%s - cannot allocate skb!\n", | |
33718363 | 1613 | __func__); |
989a1780 SW |
1614 | release = 1; |
1615 | goto out; | |
b038ced7 SW |
1616 | } |
1617 | rpl_skb->priority = CPL_PRIORITY_DATA; | |
1618 | rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl)); | |
1619 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); | |
1620 | rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
1621 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid)); | |
1622 | rpl->cmd = CPL_ABORT_NO_RST; | |
04b5d028 | 1623 | iwch_cxgb3_ofld_send(ep->com.tdev, rpl_skb); |
989a1780 SW |
1624 | out: |
1625 | if (release) | |
b038ced7 | 1626 | release_ep_resources(ep); |
b038ced7 SW |
1627 | return CPL_RET_BUF_DONE; |
1628 | } | |
1629 | ||
1630 | static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1631 | { | |
1632 | struct iwch_ep *ep = ctx; | |
1633 | struct iwch_qp_attributes attrs; | |
1634 | unsigned long flags; | |
1635 | int release = 0; | |
1636 | ||
33718363 | 1637 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1638 | BUG_ON(!ep); |
1639 | ||
1640 | /* The cm_id may be null if we failed to connect */ | |
1641 | spin_lock_irqsave(&ep->com.lock, flags); | |
1642 | switch (ep->com.state) { | |
1643 | case CLOSING: | |
b038ced7 SW |
1644 | __state_set(&ep->com, MORIBUND); |
1645 | break; | |
1646 | case MORIBUND: | |
1647 | stop_ep_timer(ep); | |
1648 | if ((ep->com.cm_id) && (ep->com.qp)) { | |
1649 | attrs.next_state = IWCH_QP_STATE_IDLE; | |
1650 | iwch_modify_qp(ep->com.qp->rhp, | |
1651 | ep->com.qp, | |
1652 | IWCH_QP_ATTR_NEXT_STATE, | |
1653 | &attrs, 1); | |
1654 | } | |
1655 | close_complete_upcall(ep); | |
1656 | __state_set(&ep->com, DEAD); | |
1657 | release = 1; | |
1658 | break; | |
42e31753 | 1659 | case ABORTING: |
b038ced7 | 1660 | case DEAD: |
c4d49776 | 1661 | break; |
b038ced7 SW |
1662 | default: |
1663 | BUG_ON(1); | |
1664 | break; | |
1665 | } | |
1666 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1667 | if (release) | |
1668 | release_ep_resources(ep); | |
1669 | return CPL_RET_BUF_DONE; | |
1670 | } | |
1671 | ||
1672 | /* | |
1673 | * T3A does 3 things when a TERM is received: | |
1674 | * 1) send up a CPL_RDMA_TERMINATE message with the TERM packet | |
1675 | * 2) generate an async event on the QP with the TERMINATE opcode | |
1676 | * 3) post a TERMINATE opcde cqe into the associated CQ. | |
1677 | * | |
1678 | * For (1), we save the message in the qp for later consumer consumption. | |
1679 | * For (2), we move the QP into TERMINATE, post a QP event and disconnect. | |
1680 | * For (3), we toss the CQE in cxio_poll_cq(). | |
1681 | * | |
1682 | * terminate() handles case (1)... | |
1683 | */ | |
1684 | static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1685 | { | |
1686 | struct iwch_ep *ep = ctx; | |
1687 | ||
42fb61f0 SW |
1688 | if (state_read(&ep->com) != FPDU_MODE) |
1689 | return CPL_RET_BUF_DONE; | |
1690 | ||
33718363 | 1691 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 | 1692 | skb_pull(skb, sizeof(struct cpl_rdma_terminate)); |
33718363 | 1693 | PDBG("%s saving %d bytes of term msg\n", __func__, skb->len); |
d626f62b ACM |
1694 | skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer, |
1695 | skb->len); | |
b038ced7 SW |
1696 | ep->com.qp->attr.terminate_msg_len = skb->len; |
1697 | ep->com.qp->attr.is_terminate_local = 0; | |
1698 | return CPL_RET_BUF_DONE; | |
1699 | } | |
1700 | ||
1701 | static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1702 | { | |
1703 | struct cpl_rdma_ec_status *rep = cplhdr(skb); | |
1704 | struct iwch_ep *ep = ctx; | |
1705 | ||
33718363 | 1706 | PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, |
b038ced7 SW |
1707 | rep->status); |
1708 | if (rep->status) { | |
1709 | struct iwch_qp_attributes attrs; | |
1710 | ||
1711 | printk(KERN_ERR MOD "%s BAD CLOSE - Aborting tid %u\n", | |
33718363 | 1712 | __func__, ep->hwtid); |
2f236735 | 1713 | stop_ep_timer(ep); |
b038ced7 SW |
1714 | attrs.next_state = IWCH_QP_STATE_ERROR; |
1715 | iwch_modify_qp(ep->com.qp->rhp, | |
1716 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1717 | &attrs, 1); | |
1718 | abort_connection(ep, NULL, GFP_KERNEL); | |
1719 | } | |
1720 | return CPL_RET_BUF_DONE; | |
1721 | } | |
1722 | ||
1723 | static void ep_timeout(unsigned long arg) | |
1724 | { | |
1725 | struct iwch_ep *ep = (struct iwch_ep *)arg; | |
1726 | struct iwch_qp_attributes attrs; | |
1727 | unsigned long flags; | |
989a1780 | 1728 | int abort = 1; |
b038ced7 SW |
1729 | |
1730 | spin_lock_irqsave(&ep->com.lock, flags); | |
33718363 | 1731 | PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid, |
b038ced7 SW |
1732 | ep->com.state); |
1733 | switch (ep->com.state) { | |
1734 | case MPA_REQ_SENT: | |
989a1780 | 1735 | __state_set(&ep->com, ABORTING); |
b038ced7 SW |
1736 | connect_reply_upcall(ep, -ETIMEDOUT); |
1737 | break; | |
1738 | case MPA_REQ_WAIT: | |
989a1780 | 1739 | __state_set(&ep->com, ABORTING); |
b038ced7 | 1740 | break; |
42e31753 | 1741 | case CLOSING: |
b038ced7 SW |
1742 | case MORIBUND: |
1743 | if (ep->com.cm_id && ep->com.qp) { | |
1744 | attrs.next_state = IWCH_QP_STATE_ERROR; | |
1745 | iwch_modify_qp(ep->com.qp->rhp, | |
1746 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1747 | &attrs, 1); | |
1748 | } | |
989a1780 | 1749 | __state_set(&ep->com, ABORTING); |
b038ced7 SW |
1750 | break; |
1751 | default: | |
989a1780 SW |
1752 | printk(KERN_ERR "%s unexpected state ep %p state %u\n", |
1753 | __func__, ep, ep->com.state); | |
1754 | WARN_ON(1); | |
1755 | abort = 0; | |
b038ced7 | 1756 | } |
b038ced7 | 1757 | spin_unlock_irqrestore(&ep->com.lock, flags); |
989a1780 SW |
1758 | if (abort) |
1759 | abort_connection(ep, NULL, GFP_ATOMIC); | |
b038ced7 SW |
1760 | put_ep(&ep->com); |
1761 | } | |
1762 | ||
1763 | int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) | |
1764 | { | |
1765 | int err; | |
1766 | struct iwch_ep *ep = to_ep(cm_id); | |
33718363 | 1767 | PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
b038ced7 SW |
1768 | |
1769 | if (state_read(&ep->com) == DEAD) { | |
1770 | put_ep(&ep->com); | |
1771 | return -ECONNRESET; | |
1772 | } | |
1773 | BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); | |
b038ced7 SW |
1774 | if (mpa_rev == 0) |
1775 | abort_connection(ep, NULL, GFP_KERNEL); | |
1776 | else { | |
1777 | err = send_mpa_reject(ep, pdata, pdata_len); | |
7d526e6b | 1778 | err = iwch_ep_disconnect(ep, 0, GFP_KERNEL); |
b038ced7 | 1779 | } |
6e47fe43 | 1780 | put_ep(&ep->com); |
b038ced7 SW |
1781 | return 0; |
1782 | } | |
1783 | ||
1784 | int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
1785 | { | |
1786 | int err; | |
1787 | struct iwch_qp_attributes attrs; | |
1788 | enum iwch_qp_attr_mask mask; | |
1789 | struct iwch_ep *ep = to_ep(cm_id); | |
1790 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1791 | struct iwch_qp *qp = get_qhp(h, conn_param->qpn); | |
1792 | ||
33718363 | 1793 | PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
6e47fe43 SW |
1794 | if (state_read(&ep->com) == DEAD) { |
1795 | err = -ECONNRESET; | |
1796 | goto err; | |
1797 | } | |
b038ced7 SW |
1798 | |
1799 | BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); | |
1800 | BUG_ON(!qp); | |
1801 | ||
1802 | if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) || | |
1803 | (conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) { | |
1804 | abort_connection(ep, NULL, GFP_KERNEL); | |
6e47fe43 SW |
1805 | err = -EINVAL; |
1806 | goto err; | |
b038ced7 SW |
1807 | } |
1808 | ||
1809 | cm_id->add_ref(cm_id); | |
1810 | ep->com.cm_id = cm_id; | |
1811 | ep->com.qp = qp; | |
1812 | ||
b038ced7 SW |
1813 | ep->ird = conn_param->ird; |
1814 | ep->ord = conn_param->ord; | |
96ac7e88 SW |
1815 | |
1816 | if (peer2peer && ep->ird == 0) | |
1817 | ep->ird = 1; | |
1818 | ||
33718363 | 1819 | PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord); |
de3d3530 | 1820 | |
b038ced7 SW |
1821 | /* bind QP to EP and move to RTS */ |
1822 | attrs.mpa_attr = ep->mpa_attr; | |
1f71f503 | 1823 | attrs.max_ird = ep->ird; |
b038ced7 SW |
1824 | attrs.max_ord = ep->ord; |
1825 | attrs.llp_stream_handle = ep; | |
1826 | attrs.next_state = IWCH_QP_STATE_RTS; | |
1827 | ||
1828 | /* bind QP and TID with INIT_WR */ | |
1829 | mask = IWCH_QP_ATTR_NEXT_STATE | | |
1830 | IWCH_QP_ATTR_LLP_STREAM_HANDLE | | |
1831 | IWCH_QP_ATTR_MPA_ATTR | | |
1832 | IWCH_QP_ATTR_MAX_IRD | | |
1833 | IWCH_QP_ATTR_MAX_ORD; | |
1834 | ||
1835 | err = iwch_modify_qp(ep->com.qp->rhp, | |
1836 | ep->com.qp, mask, &attrs, 1); | |
de3d3530 | 1837 | if (err) |
6e47fe43 | 1838 | goto err1; |
b038ced7 | 1839 | |
f8b0dfd1 SW |
1840 | /* if needed, wait for wr_ack */ |
1841 | if (iwch_rqes_posted(qp)) { | |
1842 | wait_event(ep->com.waitq, ep->com.rpl_done); | |
1843 | err = ep->com.rpl_err; | |
1844 | if (err) | |
6e47fe43 | 1845 | goto err1; |
f8b0dfd1 SW |
1846 | } |
1847 | ||
de3d3530 SW |
1848 | err = send_mpa_reply(ep, conn_param->private_data, |
1849 | conn_param->private_data_len); | |
1850 | if (err) | |
6e47fe43 | 1851 | goto err1; |
de3d3530 | 1852 | |
de3d3530 SW |
1853 | |
1854 | state_set(&ep->com, FPDU_MODE); | |
1855 | established_upcall(ep); | |
1856 | put_ep(&ep->com); | |
1857 | return 0; | |
6e47fe43 | 1858 | err1: |
de3d3530 SW |
1859 | ep->com.cm_id = NULL; |
1860 | ep->com.qp = NULL; | |
1861 | cm_id->rem_ref(cm_id); | |
6e47fe43 | 1862 | err: |
b038ced7 SW |
1863 | put_ep(&ep->com); |
1864 | return err; | |
1865 | } | |
1866 | ||
8704e9a8 SW |
1867 | static int is_loopback_dst(struct iw_cm_id *cm_id) |
1868 | { | |
1869 | struct net_device *dev; | |
1870 | ||
1871 | dev = ip_dev_find(&init_net, cm_id->remote_addr.sin_addr.s_addr); | |
1872 | if (!dev) | |
1873 | return 0; | |
1874 | dev_put(dev); | |
1875 | return 1; | |
1876 | } | |
1877 | ||
b038ced7 SW |
1878 | int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
1879 | { | |
1880 | int err = 0; | |
1881 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1882 | struct iwch_ep *ep; | |
1883 | struct rtable *rt; | |
1884 | ||
8704e9a8 SW |
1885 | if (is_loopback_dst(cm_id)) { |
1886 | err = -ENOSYS; | |
1887 | goto out; | |
1888 | } | |
1889 | ||
b038ced7 SW |
1890 | ep = alloc_ep(sizeof(*ep), GFP_KERNEL); |
1891 | if (!ep) { | |
33718363 | 1892 | printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); |
b038ced7 SW |
1893 | err = -ENOMEM; |
1894 | goto out; | |
1895 | } | |
1896 | init_timer(&ep->timer); | |
1897 | ep->plen = conn_param->private_data_len; | |
1898 | if (ep->plen) | |
1899 | memcpy(ep->mpa_pkt + sizeof(struct mpa_message), | |
1900 | conn_param->private_data, ep->plen); | |
1901 | ep->ird = conn_param->ird; | |
1902 | ep->ord = conn_param->ord; | |
96ac7e88 SW |
1903 | |
1904 | if (peer2peer && ep->ord == 0) | |
1905 | ep->ord = 1; | |
1906 | ||
b038ced7 SW |
1907 | ep->com.tdev = h->rdev.t3cdev_p; |
1908 | ||
1909 | cm_id->add_ref(cm_id); | |
1910 | ep->com.cm_id = cm_id; | |
1911 | ep->com.qp = get_qhp(h, conn_param->qpn); | |
1912 | BUG_ON(!ep->com.qp); | |
33718363 | 1913 | PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn, |
b038ced7 SW |
1914 | ep->com.qp, cm_id); |
1915 | ||
1916 | /* | |
1917 | * Allocate an active TID to initiate a TCP connection. | |
1918 | */ | |
1919 | ep->atid = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep); | |
1920 | if (ep->atid == -1) { | |
33718363 | 1921 | printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); |
b038ced7 SW |
1922 | err = -ENOMEM; |
1923 | goto fail2; | |
1924 | } | |
1925 | ||
1926 | /* find a route */ | |
1927 | rt = find_route(h->rdev.t3cdev_p, | |
1928 | cm_id->local_addr.sin_addr.s_addr, | |
1929 | cm_id->remote_addr.sin_addr.s_addr, | |
1930 | cm_id->local_addr.sin_port, | |
1931 | cm_id->remote_addr.sin_port, IPTOS_LOWDELAY); | |
1932 | if (!rt) { | |
33718363 | 1933 | printk(KERN_ERR MOD "%s - cannot find route.\n", __func__); |
b038ced7 SW |
1934 | err = -EHOSTUNREACH; |
1935 | goto fail3; | |
1936 | } | |
d8d1f30b | 1937 | ep->dst = &rt->dst; |
b038ced7 SW |
1938 | |
1939 | /* get a l2t entry */ | |
1940 | ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst->neighbour, | |
1941 | ep->dst->neighbour->dev); | |
1942 | if (!ep->l2t) { | |
33718363 | 1943 | printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__); |
b038ced7 SW |
1944 | err = -ENOMEM; |
1945 | goto fail4; | |
1946 | } | |
1947 | ||
1948 | state_set(&ep->com, CONNECTING); | |
1949 | ep->tos = IPTOS_LOWDELAY; | |
1950 | ep->com.local_addr = cm_id->local_addr; | |
1951 | ep->com.remote_addr = cm_id->remote_addr; | |
1952 | ||
1953 | /* send connect request to rnic */ | |
1954 | err = send_connect(ep); | |
1955 | if (!err) | |
1956 | goto out; | |
1957 | ||
1958 | l2t_release(L2DATA(h->rdev.t3cdev_p), ep->l2t); | |
1959 | fail4: | |
1960 | dst_release(ep->dst); | |
1961 | fail3: | |
1962 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
1963 | fail2: | |
dc35fac9 | 1964 | cm_id->rem_ref(cm_id); |
b038ced7 SW |
1965 | put_ep(&ep->com); |
1966 | out: | |
1967 | return err; | |
1968 | } | |
1969 | ||
1970 | int iwch_create_listen(struct iw_cm_id *cm_id, int backlog) | |
1971 | { | |
1972 | int err = 0; | |
1973 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1974 | struct iwch_listen_ep *ep; | |
1975 | ||
1976 | ||
1977 | might_sleep(); | |
1978 | ||
1979 | ep = alloc_ep(sizeof(*ep), GFP_KERNEL); | |
1980 | if (!ep) { | |
33718363 | 1981 | printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); |
b038ced7 SW |
1982 | err = -ENOMEM; |
1983 | goto fail1; | |
1984 | } | |
33718363 | 1985 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1986 | ep->com.tdev = h->rdev.t3cdev_p; |
1987 | cm_id->add_ref(cm_id); | |
1988 | ep->com.cm_id = cm_id; | |
1989 | ep->backlog = backlog; | |
1990 | ep->com.local_addr = cm_id->local_addr; | |
1991 | ||
1992 | /* | |
1993 | * Allocate a server TID. | |
1994 | */ | |
1995 | ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep); | |
1996 | if (ep->stid == -1) { | |
33718363 | 1997 | printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); |
b038ced7 SW |
1998 | err = -ENOMEM; |
1999 | goto fail2; | |
2000 | } | |
2001 | ||
2002 | state_set(&ep->com, LISTEN); | |
2003 | err = listen_start(ep); | |
2004 | if (err) | |
2005 | goto fail3; | |
2006 | ||
2007 | /* wait for pass_open_rpl */ | |
2008 | wait_event(ep->com.waitq, ep->com.rpl_done); | |
2009 | err = ep->com.rpl_err; | |
2010 | if (!err) { | |
2011 | cm_id->provider_data = ep; | |
2012 | goto out; | |
2013 | } | |
2014 | fail3: | |
2015 | cxgb3_free_stid(ep->com.tdev, ep->stid); | |
2016 | fail2: | |
1b07db70 | 2017 | cm_id->rem_ref(cm_id); |
b038ced7 SW |
2018 | put_ep(&ep->com); |
2019 | fail1: | |
2020 | out: | |
2021 | return err; | |
2022 | } | |
2023 | ||
2024 | int iwch_destroy_listen(struct iw_cm_id *cm_id) | |
2025 | { | |
2026 | int err; | |
2027 | struct iwch_listen_ep *ep = to_listen_ep(cm_id); | |
2028 | ||
33718363 | 2029 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
2030 | |
2031 | might_sleep(); | |
2032 | state_set(&ep->com, DEAD); | |
2033 | ep->com.rpl_done = 0; | |
2034 | ep->com.rpl_err = 0; | |
2035 | err = listen_stop(ep); | |
04b5d028 SW |
2036 | if (err) |
2037 | goto done; | |
b038ced7 SW |
2038 | wait_event(ep->com.waitq, ep->com.rpl_done); |
2039 | cxgb3_free_stid(ep->com.tdev, ep->stid); | |
04b5d028 | 2040 | done: |
b038ced7 SW |
2041 | err = ep->com.rpl_err; |
2042 | cm_id->rem_ref(cm_id); | |
2043 | put_ep(&ep->com); | |
2044 | return err; | |
2045 | } | |
2046 | ||
2047 | int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp) | |
2048 | { | |
2049 | int ret=0; | |
2050 | unsigned long flags; | |
2051 | int close = 0; | |
04b5d028 SW |
2052 | int fatal = 0; |
2053 | struct t3cdev *tdev; | |
2054 | struct cxio_rdev *rdev; | |
b038ced7 SW |
2055 | |
2056 | spin_lock_irqsave(&ep->com.lock, flags); | |
2057 | ||
33718363 | 2058 | PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep, |
b038ced7 SW |
2059 | states[ep->com.state], abrupt); |
2060 | ||
04b5d028 SW |
2061 | tdev = (struct t3cdev *)ep->com.tdev; |
2062 | rdev = (struct cxio_rdev *)tdev->ulp; | |
2063 | if (cxio_fatal_error(rdev)) { | |
2064 | fatal = 1; | |
2065 | close_complete_upcall(ep); | |
2066 | ep->com.state = DEAD; | |
2067 | } | |
b038ced7 SW |
2068 | switch (ep->com.state) { |
2069 | case MPA_REQ_WAIT: | |
2070 | case MPA_REQ_SENT: | |
2071 | case MPA_REQ_RCVD: | |
2072 | case MPA_REP_SENT: | |
2073 | case FPDU_MODE: | |
b038ced7 | 2074 | close = 1; |
989a1780 SW |
2075 | if (abrupt) |
2076 | ep->com.state = ABORTING; | |
2077 | else { | |
2078 | ep->com.state = CLOSING; | |
2079 | start_ep_timer(ep); | |
2080 | } | |
6e47fe43 | 2081 | set_bit(CLOSE_SENT, &ep->com.flags); |
b038ced7 SW |
2082 | break; |
2083 | case CLOSING: | |
6e47fe43 SW |
2084 | if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) { |
2085 | close = 1; | |
2086 | if (abrupt) { | |
2087 | stop_ep_timer(ep); | |
2088 | ep->com.state = ABORTING; | |
2089 | } else | |
2090 | ep->com.state = MORIBUND; | |
2091 | } | |
b038ced7 SW |
2092 | break; |
2093 | case MORIBUND: | |
989a1780 SW |
2094 | case ABORTING: |
2095 | case DEAD: | |
2096 | PDBG("%s ignoring disconnect ep %p state %u\n", | |
2097 | __func__, ep, ep->com.state); | |
b038ced7 SW |
2098 | break; |
2099 | default: | |
2100 | BUG(); | |
2101 | break; | |
2102 | } | |
989a1780 | 2103 | |
b038ced7 SW |
2104 | spin_unlock_irqrestore(&ep->com.lock, flags); |
2105 | if (close) { | |
2106 | if (abrupt) | |
2107 | ret = send_abort(ep, NULL, gfp); | |
2108 | else | |
2109 | ret = send_halfclose(ep, gfp); | |
04b5d028 SW |
2110 | if (ret) |
2111 | fatal = 1; | |
b038ced7 | 2112 | } |
04b5d028 SW |
2113 | if (fatal) |
2114 | release_ep_resources(ep); | |
b038ced7 SW |
2115 | return ret; |
2116 | } | |
2117 | ||
2118 | int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, | |
2119 | struct l2t_entry *l2t) | |
2120 | { | |
2121 | struct iwch_ep *ep = ctx; | |
2122 | ||
2123 | if (ep->dst != old) | |
2124 | return 0; | |
2125 | ||
33718363 | 2126 | PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new, |
b038ced7 SW |
2127 | l2t); |
2128 | dst_hold(new); | |
2129 | l2t_release(L2DATA(ep->com.tdev), ep->l2t); | |
2130 | ep->l2t = l2t; | |
2131 | dst_release(old); | |
2132 | ep->dst = new; | |
2133 | return 1; | |
2134 | } | |
2135 | ||
2136 | /* | |
2137 | * All the CM events are handled on a work queue to have a safe context. | |
617c9a7e | 2138 | * These are the real handlers that are called from the work queue. |
b038ced7 | 2139 | */ |
617c9a7e RD |
2140 | static const cxgb3_cpl_handler_func work_handlers[NUM_CPL_CMDS] = { |
2141 | [CPL_ACT_ESTABLISH] = act_establish, | |
2142 | [CPL_ACT_OPEN_RPL] = act_open_rpl, | |
2143 | [CPL_RX_DATA] = rx_data, | |
2144 | [CPL_TX_DMA_ACK] = tx_ack, | |
2145 | [CPL_ABORT_RPL_RSS] = abort_rpl, | |
2146 | [CPL_ABORT_RPL] = abort_rpl, | |
2147 | [CPL_PASS_OPEN_RPL] = pass_open_rpl, | |
2148 | [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl, | |
2149 | [CPL_PASS_ACCEPT_REQ] = pass_accept_req, | |
2150 | [CPL_PASS_ESTABLISH] = pass_establish, | |
2151 | [CPL_PEER_CLOSE] = peer_close, | |
2152 | [CPL_ABORT_REQ_RSS] = peer_abort, | |
2153 | [CPL_CLOSE_CON_RPL] = close_con_rpl, | |
2154 | [CPL_RDMA_TERMINATE] = terminate, | |
2155 | [CPL_RDMA_EC_STATUS] = ec_status, | |
2156 | }; | |
2157 | ||
2158 | static void process_work(struct work_struct *work) | |
2159 | { | |
2160 | struct sk_buff *skb = NULL; | |
2161 | void *ep; | |
2162 | struct t3cdev *tdev; | |
2163 | int ret; | |
2164 | ||
2165 | while ((skb = skb_dequeue(&rxq))) { | |
2166 | ep = *((void **) (skb->cb)); | |
2167 | tdev = *((struct t3cdev **) (skb->cb + sizeof(void *))); | |
2168 | ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep); | |
2169 | if (ret & CPL_RET_BUF_DONE) | |
2170 | kfree_skb(skb); | |
2171 | ||
2172 | /* | |
2173 | * ep was referenced in sched(), and is freed here. | |
2174 | */ | |
2175 | put_ep((struct iwch_ep_common *)ep); | |
2176 | } | |
2177 | } | |
2178 | ||
2179 | static DECLARE_WORK(skb_work, process_work); | |
2180 | ||
b038ced7 SW |
2181 | static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
2182 | { | |
2183 | struct iwch_ep_common *epc = ctx; | |
2184 | ||
2185 | get_ep(epc); | |
2186 | ||
2187 | /* | |
2188 | * Save ctx and tdev in the skb->cb area. | |
2189 | */ | |
2190 | *((void **) skb->cb) = ctx; | |
2191 | *((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev; | |
2192 | ||
2193 | /* | |
2194 | * Queue the skb and schedule the worker thread. | |
2195 | */ | |
2196 | skb_queue_tail(&rxq, skb); | |
2197 | queue_work(workq, &skb_work); | |
2198 | return 0; | |
2199 | } | |
2200 | ||
1ca19770 SW |
2201 | static int set_tcb_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
2202 | { | |
2203 | struct cpl_set_tcb_rpl *rpl = cplhdr(skb); | |
2204 | ||
2205 | if (rpl->status != CPL_ERR_NONE) { | |
2206 | printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u " | |
2207 | "for tid %u\n", rpl->status, GET_TID(rpl)); | |
2208 | } | |
2209 | return CPL_RET_BUF_DONE; | |
2210 | } | |
2211 | ||
617c9a7e RD |
2212 | /* |
2213 | * All upcalls from the T3 Core go to sched() to schedule the | |
2214 | * processing on a work queue. | |
2215 | */ | |
2216 | cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS] = { | |
2217 | [CPL_ACT_ESTABLISH] = sched, | |
2218 | [CPL_ACT_OPEN_RPL] = sched, | |
2219 | [CPL_RX_DATA] = sched, | |
2220 | [CPL_TX_DMA_ACK] = sched, | |
2221 | [CPL_ABORT_RPL_RSS] = sched, | |
2222 | [CPL_ABORT_RPL] = sched, | |
2223 | [CPL_PASS_OPEN_RPL] = sched, | |
2224 | [CPL_CLOSE_LISTSRV_RPL] = sched, | |
2225 | [CPL_PASS_ACCEPT_REQ] = sched, | |
2226 | [CPL_PASS_ESTABLISH] = sched, | |
2227 | [CPL_PEER_CLOSE] = sched, | |
2228 | [CPL_CLOSE_CON_RPL] = sched, | |
2229 | [CPL_ABORT_REQ_RSS] = sched, | |
2230 | [CPL_RDMA_TERMINATE] = sched, | |
2231 | [CPL_RDMA_EC_STATUS] = sched, | |
2232 | [CPL_SET_TCB_RPL] = set_tcb_rpl, | |
2233 | }; | |
2234 | ||
b038ced7 SW |
2235 | int __init iwch_cm_init(void) |
2236 | { | |
2237 | skb_queue_head_init(&rxq); | |
2238 | ||
2239 | workq = create_singlethread_workqueue("iw_cxgb3"); | |
2240 | if (!workq) | |
2241 | return -ENOMEM; | |
2242 | ||
b038ced7 SW |
2243 | return 0; |
2244 | } | |
2245 | ||
2246 | void __exit iwch_cm_term(void) | |
2247 | { | |
2248 | flush_workqueue(workq); | |
2249 | destroy_workqueue(workq); | |
2250 | } |