Commit | Line | Data |
---|---|---|
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 | ||
142 | static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb) | |
143 | { | |
144 | struct cpl_tid_release *req; | |
145 | ||
146 | skb = get_skb(skb, sizeof *req, GFP_KERNEL); | |
147 | if (!skb) | |
148 | return; | |
149 | req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req)); | |
150 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
151 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid)); | |
152 | skb->priority = CPL_PRIORITY_SETUP; | |
699924b1 | 153 | cxgb3_ofld_send(tdev, skb); |
b038ced7 SW |
154 | return; |
155 | } | |
156 | ||
157 | int iwch_quiesce_tid(struct iwch_ep *ep) | |
158 | { | |
159 | struct cpl_set_tcb_field *req; | |
160 | struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
161 | ||
162 | if (!skb) | |
163 | return -ENOMEM; | |
164 | req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); | |
165 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
166 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
167 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); | |
168 | req->reply = 0; | |
169 | req->cpu_idx = 0; | |
170 | req->word = htons(W_TCB_RX_QUIESCE); | |
171 | req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); | |
172 | req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE); | |
173 | ||
174 | skb->priority = CPL_PRIORITY_DATA; | |
699924b1 | 175 | cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
176 | return 0; |
177 | } | |
178 | ||
179 | int iwch_resume_tid(struct iwch_ep *ep) | |
180 | { | |
181 | struct cpl_set_tcb_field *req; | |
182 | struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
183 | ||
184 | if (!skb) | |
185 | return -ENOMEM; | |
186 | req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); | |
187 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
188 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
189 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); | |
190 | req->reply = 0; | |
191 | req->cpu_idx = 0; | |
192 | req->word = htons(W_TCB_RX_QUIESCE); | |
193 | req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); | |
194 | req->val = 0; | |
195 | ||
196 | skb->priority = CPL_PRIORITY_DATA; | |
699924b1 | 197 | cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
198 | return 0; |
199 | } | |
200 | ||
201 | static void set_emss(struct iwch_ep *ep, u16 opt) | |
202 | { | |
33718363 | 203 | PDBG("%s ep %p opt %u\n", __func__, ep, opt); |
b038ced7 SW |
204 | ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40; |
205 | if (G_TCPOPT_TSTAMP(opt)) | |
206 | ep->emss -= 12; | |
207 | if (ep->emss < 128) | |
208 | ep->emss = 128; | |
209 | PDBG("emss=%d\n", ep->emss); | |
210 | } | |
211 | ||
212 | static enum iwch_ep_state state_read(struct iwch_ep_common *epc) | |
213 | { | |
214 | unsigned long flags; | |
215 | enum iwch_ep_state state; | |
216 | ||
217 | spin_lock_irqsave(&epc->lock, flags); | |
218 | state = epc->state; | |
219 | spin_unlock_irqrestore(&epc->lock, flags); | |
220 | return state; | |
221 | } | |
222 | ||
2b540355 | 223 | static void __state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) |
b038ced7 SW |
224 | { |
225 | epc->state = new; | |
226 | } | |
227 | ||
228 | static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) | |
229 | { | |
230 | unsigned long flags; | |
231 | ||
232 | spin_lock_irqsave(&epc->lock, flags); | |
33718363 | 233 | PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]); |
b038ced7 SW |
234 | __state_set(epc, new); |
235 | spin_unlock_irqrestore(&epc->lock, flags); | |
236 | return; | |
237 | } | |
238 | ||
239 | static void *alloc_ep(int size, gfp_t gfp) | |
240 | { | |
241 | struct iwch_ep_common *epc; | |
242 | ||
dd00cc48 | 243 | epc = kzalloc(size, gfp); |
b038ced7 | 244 | if (epc) { |
b038ced7 SW |
245 | kref_init(&epc->kref); |
246 | spin_lock_init(&epc->lock); | |
247 | init_waitqueue_head(&epc->waitq); | |
248 | } | |
33718363 | 249 | PDBG("%s alloc ep %p\n", __func__, epc); |
b038ced7 SW |
250 | return epc; |
251 | } | |
252 | ||
253 | void __free_ep(struct kref *kref) | |
254 | { | |
255 | struct iwch_ep_common *epc; | |
256 | epc = container_of(kref, struct iwch_ep_common, kref); | |
33718363 | 257 | PDBG("%s ep %p state %s\n", __func__, epc, states[state_read(epc)]); |
b038ced7 SW |
258 | kfree(epc); |
259 | } | |
260 | ||
261 | static void release_ep_resources(struct iwch_ep *ep) | |
262 | { | |
33718363 | 263 | PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
b038ced7 SW |
264 | cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid); |
265 | dst_release(ep->dst); | |
266 | l2t_release(L2DATA(ep->com.tdev), ep->l2t); | |
b038ced7 SW |
267 | put_ep(&ep->com); |
268 | } | |
269 | ||
270 | static void process_work(struct work_struct *work) | |
271 | { | |
272 | struct sk_buff *skb = NULL; | |
273 | void *ep; | |
274 | struct t3cdev *tdev; | |
275 | int ret; | |
276 | ||
277 | while ((skb = skb_dequeue(&rxq))) { | |
278 | ep = *((void **) (skb->cb)); | |
279 | tdev = *((struct t3cdev **) (skb->cb + sizeof(void *))); | |
280 | ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep); | |
281 | if (ret & CPL_RET_BUF_DONE) | |
282 | kfree_skb(skb); | |
283 | ||
284 | /* | |
285 | * ep was referenced in sched(), and is freed here. | |
286 | */ | |
287 | put_ep((struct iwch_ep_common *)ep); | |
288 | } | |
289 | } | |
290 | ||
291 | static int status2errno(int status) | |
292 | { | |
293 | switch (status) { | |
294 | case CPL_ERR_NONE: | |
295 | return 0; | |
296 | case CPL_ERR_CONN_RESET: | |
297 | return -ECONNRESET; | |
298 | case CPL_ERR_ARP_MISS: | |
299 | return -EHOSTUNREACH; | |
300 | case CPL_ERR_CONN_TIMEDOUT: | |
301 | return -ETIMEDOUT; | |
302 | case CPL_ERR_TCAM_FULL: | |
303 | return -ENOMEM; | |
304 | case CPL_ERR_CONN_EXIST: | |
305 | return -EADDRINUSE; | |
306 | default: | |
307 | return -EIO; | |
308 | } | |
309 | } | |
310 | ||
311 | /* | |
312 | * Try and reuse skbs already allocated... | |
313 | */ | |
314 | static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp) | |
315 | { | |
1f6a849b | 316 | if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) { |
b038ced7 SW |
317 | skb_trim(skb, 0); |
318 | skb_get(skb); | |
319 | } else { | |
320 | skb = alloc_skb(len, gfp); | |
321 | } | |
322 | return skb; | |
323 | } | |
324 | ||
325 | static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip, | |
326 | __be32 peer_ip, __be16 local_port, | |
327 | __be16 peer_port, u8 tos) | |
328 | { | |
329 | struct rtable *rt; | |
330 | struct flowi fl = { | |
331 | .oif = 0, | |
332 | .nl_u = { | |
333 | .ip4_u = { | |
334 | .daddr = peer_ip, | |
335 | .saddr = local_ip, | |
336 | .tos = tos} | |
337 | }, | |
338 | .proto = IPPROTO_TCP, | |
339 | .uli_u = { | |
340 | .ports = { | |
341 | .sport = local_port, | |
342 | .dport = peer_port} | |
343 | } | |
344 | }; | |
345 | ||
f1b050bf | 346 | if (ip_route_output_flow(&init_net, &rt, &fl, NULL, 0)) |
b038ced7 SW |
347 | return NULL; |
348 | return rt; | |
349 | } | |
350 | ||
351 | static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu) | |
352 | { | |
353 | int i = 0; | |
354 | ||
355 | while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu) | |
356 | ++i; | |
357 | return i; | |
358 | } | |
359 | ||
360 | static void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb) | |
361 | { | |
33718363 | 362 | PDBG("%s t3cdev %p\n", __func__, dev); |
b038ced7 SW |
363 | kfree_skb(skb); |
364 | } | |
365 | ||
366 | /* | |
367 | * Handle an ARP failure for an active open. | |
368 | */ | |
369 | static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb) | |
370 | { | |
371 | printk(KERN_ERR MOD "ARP failure duing connect\n"); | |
372 | kfree_skb(skb); | |
373 | } | |
374 | ||
375 | /* | |
376 | * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant | |
377 | * and send it along. | |
378 | */ | |
379 | static void abort_arp_failure(struct t3cdev *dev, struct sk_buff *skb) | |
380 | { | |
381 | struct cpl_abort_req *req = cplhdr(skb); | |
382 | ||
33718363 | 383 | PDBG("%s t3cdev %p\n", __func__, dev); |
b038ced7 SW |
384 | req->cmd = CPL_ABORT_NO_RST; |
385 | cxgb3_ofld_send(dev, skb); | |
386 | } | |
387 | ||
388 | static int send_halfclose(struct iwch_ep *ep, gfp_t gfp) | |
389 | { | |
390 | struct cpl_close_con_req *req; | |
391 | struct sk_buff *skb; | |
392 | ||
33718363 | 393 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
394 | skb = get_skb(NULL, sizeof(*req), gfp); |
395 | if (!skb) { | |
33718363 | 396 | printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); |
b038ced7 SW |
397 | return -ENOMEM; |
398 | } | |
399 | skb->priority = CPL_PRIORITY_DATA; | |
400 | set_arp_failure_handler(skb, arp_failure_discard); | |
401 | req = (struct cpl_close_con_req *) skb_put(skb, sizeof(*req)); | |
402 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); | |
403 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
404 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid)); | |
405 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
406 | return 0; | |
407 | } | |
408 | ||
409 | static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) | |
410 | { | |
411 | struct cpl_abort_req *req; | |
412 | ||
33718363 | 413 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
414 | skb = get_skb(skb, sizeof(*req), gfp); |
415 | if (!skb) { | |
416 | printk(KERN_ERR MOD "%s - failed to alloc skb.\n", | |
33718363 | 417 | __func__); |
b038ced7 SW |
418 | return -ENOMEM; |
419 | } | |
420 | skb->priority = CPL_PRIORITY_DATA; | |
421 | set_arp_failure_handler(skb, abort_arp_failure); | |
422 | req = (struct cpl_abort_req *) skb_put(skb, sizeof(*req)); | |
423 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); | |
424 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
425 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid)); | |
426 | req->cmd = CPL_ABORT_SEND_RST; | |
427 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
428 | return 0; | |
429 | } | |
430 | ||
431 | static int send_connect(struct iwch_ep *ep) | |
432 | { | |
433 | struct cpl_act_open_req *req; | |
434 | struct sk_buff *skb; | |
435 | u32 opt0h, opt0l, opt2; | |
436 | unsigned int mtu_idx; | |
437 | int wscale; | |
438 | ||
33718363 | 439 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
440 | |
441 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
442 | if (!skb) { | |
443 | printk(KERN_ERR MOD "%s - failed to alloc skb.\n", | |
33718363 | 444 | __func__); |
b038ced7 SW |
445 | return -ENOMEM; |
446 | } | |
447 | mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); | |
448 | wscale = compute_wscale(rcv_win); | |
449 | opt0h = V_NAGLE(0) | | |
450 | V_NO_CONG(nocong) | | |
451 | V_KEEP_ALIVE(1) | | |
452 | F_TCAM_BYPASS | | |
453 | V_WND_SCALE(wscale) | | |
454 | V_MSS_IDX(mtu_idx) | | |
455 | V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); | |
456 | opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); | |
457 | opt2 = V_FLAVORS_VALID(1) | V_CONG_CONTROL_FLAVOR(cong_flavor); | |
458 | skb->priority = CPL_PRIORITY_SETUP; | |
459 | set_arp_failure_handler(skb, act_open_req_arp_failure); | |
460 | ||
461 | req = (struct cpl_act_open_req *) skb_put(skb, sizeof(*req)); | |
462 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
463 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ep->atid)); | |
464 | req->local_port = ep->com.local_addr.sin_port; | |
465 | req->peer_port = ep->com.remote_addr.sin_port; | |
466 | req->local_ip = ep->com.local_addr.sin_addr.s_addr; | |
467 | req->peer_ip = ep->com.remote_addr.sin_addr.s_addr; | |
468 | req->opt0h = htonl(opt0h); | |
469 | req->opt0l = htonl(opt0l); | |
470 | req->params = 0; | |
471 | req->opt2 = htonl(opt2); | |
472 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
473 | return 0; | |
474 | } | |
475 | ||
476 | static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb) | |
477 | { | |
478 | int mpalen; | |
479 | struct tx_data_wr *req; | |
480 | struct mpa_message *mpa; | |
481 | int len; | |
482 | ||
33718363 | 483 | PDBG("%s ep %p pd_len %d\n", __func__, ep, ep->plen); |
b038ced7 SW |
484 | |
485 | BUG_ON(skb_cloned(skb)); | |
486 | ||
487 | mpalen = sizeof(*mpa) + ep->plen; | |
4305b541 | 488 | if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) { |
b038ced7 SW |
489 | kfree_skb(skb); |
490 | skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL); | |
491 | if (!skb) { | |
492 | connect_reply_upcall(ep, -ENOMEM); | |
493 | return; | |
494 | } | |
495 | } | |
496 | skb_trim(skb, 0); | |
497 | skb_reserve(skb, sizeof(*req)); | |
498 | skb_put(skb, mpalen); | |
499 | skb->priority = CPL_PRIORITY_DATA; | |
500 | mpa = (struct mpa_message *) skb->data; | |
501 | memset(mpa, 0, sizeof(*mpa)); | |
502 | memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)); | |
503 | mpa->flags = (crc_enabled ? MPA_CRC : 0) | | |
504 | (markers_enabled ? MPA_MARKERS : 0); | |
505 | mpa->private_data_size = htons(ep->plen); | |
506 | mpa->revision = mpa_rev; | |
507 | ||
508 | if (ep->plen) | |
509 | memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen); | |
510 | ||
511 | /* | |
512 | * Reference the mpa skb. This ensures the data area | |
513 | * will remain in memory until the hw acks the tx. | |
514 | * Function tx_ack() will deref it. | |
515 | */ | |
516 | skb_get(skb); | |
517 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 518 | skb_reset_transport_header(skb); |
b038ced7 SW |
519 | len = skb->len; |
520 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); | |
f8b0dfd1 | 521 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); |
b038ced7 SW |
522 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
523 | req->len = htonl(len); | |
524 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
525 | V_TX_SNDBUF(snd_win>>15)); | |
de3d3530 | 526 | req->flags = htonl(F_TX_INIT); |
b038ced7 SW |
527 | req->sndseq = htonl(ep->snd_seq); |
528 | BUG_ON(ep->mpa_skb); | |
529 | ep->mpa_skb = skb; | |
530 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
531 | start_ep_timer(ep); | |
532 | state_set(&ep->com, MPA_REQ_SENT); | |
533 | return; | |
534 | } | |
535 | ||
536 | static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen) | |
537 | { | |
538 | int mpalen; | |
539 | struct tx_data_wr *req; | |
540 | struct mpa_message *mpa; | |
541 | struct sk_buff *skb; | |
542 | ||
33718363 | 543 | PDBG("%s ep %p plen %d\n", __func__, ep, plen); |
b038ced7 SW |
544 | |
545 | mpalen = sizeof(*mpa) + plen; | |
546 | ||
547 | skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); | |
548 | if (!skb) { | |
33718363 | 549 | printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); |
b038ced7 SW |
550 | return -ENOMEM; |
551 | } | |
552 | skb_reserve(skb, sizeof(*req)); | |
553 | mpa = (struct mpa_message *) skb_put(skb, mpalen); | |
554 | memset(mpa, 0, sizeof(*mpa)); | |
555 | memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); | |
556 | mpa->flags = MPA_REJECT; | |
557 | mpa->revision = mpa_rev; | |
558 | mpa->private_data_size = htons(plen); | |
559 | if (plen) | |
560 | memcpy(mpa->private_data, pdata, plen); | |
561 | ||
562 | /* | |
563 | * Reference the mpa skb again. This ensures the data area | |
564 | * will remain in memory until the hw acks the tx. | |
565 | * Function tx_ack() will deref it. | |
566 | */ | |
567 | skb_get(skb); | |
568 | skb->priority = CPL_PRIORITY_DATA; | |
569 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 570 | skb_reset_transport_header(skb); |
b038ced7 | 571 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); |
f8b0dfd1 | 572 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); |
b038ced7 SW |
573 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
574 | req->len = htonl(mpalen); | |
575 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
576 | V_TX_SNDBUF(snd_win>>15)); | |
de3d3530 | 577 | req->flags = htonl(F_TX_INIT); |
b038ced7 SW |
578 | req->sndseq = htonl(ep->snd_seq); |
579 | BUG_ON(ep->mpa_skb); | |
580 | ep->mpa_skb = skb; | |
581 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
582 | return 0; | |
583 | } | |
584 | ||
585 | static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen) | |
586 | { | |
587 | int mpalen; | |
588 | struct tx_data_wr *req; | |
589 | struct mpa_message *mpa; | |
590 | int len; | |
591 | struct sk_buff *skb; | |
592 | ||
33718363 | 593 | PDBG("%s ep %p plen %d\n", __func__, ep, plen); |
b038ced7 SW |
594 | |
595 | mpalen = sizeof(*mpa) + plen; | |
596 | ||
597 | skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); | |
598 | if (!skb) { | |
33718363 | 599 | printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); |
b038ced7 SW |
600 | return -ENOMEM; |
601 | } | |
602 | skb->priority = CPL_PRIORITY_DATA; | |
603 | skb_reserve(skb, sizeof(*req)); | |
604 | mpa = (struct mpa_message *) skb_put(skb, mpalen); | |
605 | memset(mpa, 0, sizeof(*mpa)); | |
606 | memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); | |
607 | mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) | | |
608 | (markers_enabled ? MPA_MARKERS : 0); | |
609 | mpa->revision = mpa_rev; | |
610 | mpa->private_data_size = htons(plen); | |
611 | if (plen) | |
612 | memcpy(mpa->private_data, pdata, plen); | |
613 | ||
614 | /* | |
615 | * Reference the mpa skb. This ensures the data area | |
616 | * will remain in memory until the hw acks the tx. | |
617 | * Function tx_ack() will deref it. | |
618 | */ | |
619 | skb_get(skb); | |
620 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 621 | skb_reset_transport_header(skb); |
b038ced7 SW |
622 | len = skb->len; |
623 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); | |
f8b0dfd1 | 624 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); |
b038ced7 SW |
625 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
626 | req->len = htonl(len); | |
627 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
628 | V_TX_SNDBUF(snd_win>>15)); | |
de3d3530 | 629 | req->flags = htonl(F_TX_INIT); |
b038ced7 SW |
630 | req->sndseq = htonl(ep->snd_seq); |
631 | ep->mpa_skb = skb; | |
632 | state_set(&ep->com, MPA_REP_SENT); | |
633 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
634 | return 0; | |
635 | } | |
636 | ||
637 | static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
638 | { | |
639 | struct iwch_ep *ep = ctx; | |
640 | struct cpl_act_establish *req = cplhdr(skb); | |
641 | unsigned int tid = GET_TID(req); | |
642 | ||
33718363 | 643 | PDBG("%s ep %p tid %d\n", __func__, ep, tid); |
b038ced7 SW |
644 | |
645 | dst_confirm(ep->dst); | |
646 | ||
647 | /* setup the hwtid for this connection */ | |
648 | ep->hwtid = tid; | |
649 | cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid); | |
650 | ||
651 | ep->snd_seq = ntohl(req->snd_isn); | |
de3d3530 | 652 | ep->rcv_seq = ntohl(req->rcv_isn); |
b038ced7 SW |
653 | |
654 | set_emss(ep, ntohs(req->tcp_opt)); | |
655 | ||
656 | /* dealloc the atid */ | |
657 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
658 | ||
659 | /* start MPA negotiation */ | |
660 | send_mpa_req(ep, skb); | |
661 | ||
662 | return 0; | |
663 | } | |
664 | ||
665 | static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) | |
666 | { | |
667 | PDBG("%s ep %p\n", __FILE__, ep); | |
668 | state_set(&ep->com, ABORTING); | |
669 | send_abort(ep, skb, gfp); | |
670 | } | |
671 | ||
672 | static void close_complete_upcall(struct iwch_ep *ep) | |
673 | { | |
674 | struct iw_cm_event event; | |
675 | ||
33718363 | 676 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
677 | memset(&event, 0, sizeof(event)); |
678 | event.event = IW_CM_EVENT_CLOSE; | |
679 | if (ep->com.cm_id) { | |
680 | PDBG("close complete delivered ep %p cm_id %p tid %d\n", | |
681 | ep, ep->com.cm_id, ep->hwtid); | |
682 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
683 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
684 | ep->com.cm_id = NULL; | |
685 | ep->com.qp = NULL; | |
686 | } | |
687 | } | |
688 | ||
689 | static void peer_close_upcall(struct iwch_ep *ep) | |
690 | { | |
691 | struct iw_cm_event event; | |
692 | ||
33718363 | 693 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
694 | memset(&event, 0, sizeof(event)); |
695 | event.event = IW_CM_EVENT_DISCONNECT; | |
696 | if (ep->com.cm_id) { | |
697 | PDBG("peer close delivered ep %p cm_id %p tid %d\n", | |
698 | ep, ep->com.cm_id, ep->hwtid); | |
699 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
700 | } | |
701 | } | |
702 | ||
703 | static void peer_abort_upcall(struct iwch_ep *ep) | |
704 | { | |
705 | struct iw_cm_event event; | |
706 | ||
33718363 | 707 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
708 | memset(&event, 0, sizeof(event)); |
709 | event.event = IW_CM_EVENT_CLOSE; | |
710 | event.status = -ECONNRESET; | |
711 | if (ep->com.cm_id) { | |
712 | PDBG("abort delivered ep %p cm_id %p tid %d\n", ep, | |
713 | ep->com.cm_id, ep->hwtid); | |
714 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
715 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
716 | ep->com.cm_id = NULL; | |
717 | ep->com.qp = NULL; | |
718 | } | |
719 | } | |
720 | ||
721 | static void connect_reply_upcall(struct iwch_ep *ep, int status) | |
722 | { | |
723 | struct iw_cm_event event; | |
724 | ||
33718363 | 725 | PDBG("%s ep %p status %d\n", __func__, ep, status); |
b038ced7 SW |
726 | memset(&event, 0, sizeof(event)); |
727 | event.event = IW_CM_EVENT_CONNECT_REPLY; | |
728 | event.status = status; | |
729 | event.local_addr = ep->com.local_addr; | |
730 | event.remote_addr = ep->com.remote_addr; | |
731 | ||
732 | if ((status == 0) || (status == -ECONNREFUSED)) { | |
733 | event.private_data_len = ep->plen; | |
734 | event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); | |
735 | } | |
736 | if (ep->com.cm_id) { | |
33718363 | 737 | PDBG("%s ep %p tid %d status %d\n", __func__, ep, |
b038ced7 SW |
738 | ep->hwtid, status); |
739 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
740 | } | |
741 | if (status < 0) { | |
742 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
743 | ep->com.cm_id = NULL; | |
744 | ep->com.qp = NULL; | |
745 | } | |
746 | } | |
747 | ||
748 | static void connect_request_upcall(struct iwch_ep *ep) | |
749 | { | |
750 | struct iw_cm_event event; | |
751 | ||
33718363 | 752 | PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
b038ced7 SW |
753 | memset(&event, 0, sizeof(event)); |
754 | event.event = IW_CM_EVENT_CONNECT_REQUEST; | |
755 | event.local_addr = ep->com.local_addr; | |
756 | event.remote_addr = ep->com.remote_addr; | |
757 | event.private_data_len = ep->plen; | |
758 | event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); | |
759 | event.provider_data = ep; | |
760 | if (state_read(&ep->parent_ep->com) != DEAD) | |
761 | ep->parent_ep->com.cm_id->event_handler( | |
762 | ep->parent_ep->com.cm_id, | |
763 | &event); | |
764 | put_ep(&ep->parent_ep->com); | |
765 | ep->parent_ep = NULL; | |
766 | } | |
767 | ||
768 | static void established_upcall(struct iwch_ep *ep) | |
769 | { | |
770 | struct iw_cm_event event; | |
771 | ||
33718363 | 772 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
773 | memset(&event, 0, sizeof(event)); |
774 | event.event = IW_CM_EVENT_ESTABLISHED; | |
775 | if (ep->com.cm_id) { | |
33718363 | 776 | PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
b038ced7 SW |
777 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
778 | } | |
779 | } | |
780 | ||
781 | static int update_rx_credits(struct iwch_ep *ep, u32 credits) | |
782 | { | |
783 | struct cpl_rx_data_ack *req; | |
784 | struct sk_buff *skb; | |
785 | ||
33718363 | 786 | PDBG("%s ep %p credits %u\n", __func__, ep, credits); |
b038ced7 SW |
787 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
788 | if (!skb) { | |
789 | printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n"); | |
790 | return 0; | |
791 | } | |
792 | ||
793 | req = (struct cpl_rx_data_ack *) skb_put(skb, sizeof(*req)); | |
794 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
795 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid)); | |
796 | req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1)); | |
797 | skb->priority = CPL_PRIORITY_ACK; | |
699924b1 | 798 | cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
799 | return credits; |
800 | } | |
801 | ||
802 | static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb) | |
803 | { | |
804 | struct mpa_message *mpa; | |
805 | u16 plen; | |
806 | struct iwch_qp_attributes attrs; | |
807 | enum iwch_qp_attr_mask mask; | |
808 | int err; | |
809 | ||
33718363 | 810 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
811 | |
812 | /* | |
813 | * Stop mpa timer. If it expired, then the state has | |
814 | * changed and we bail since ep_timeout already aborted | |
815 | * the connection. | |
816 | */ | |
817 | stop_ep_timer(ep); | |
818 | if (state_read(&ep->com) != MPA_REQ_SENT) | |
819 | return; | |
820 | ||
821 | /* | |
822 | * If we get more than the supported amount of private data | |
823 | * then we must fail this connection. | |
824 | */ | |
825 | if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { | |
826 | err = -EINVAL; | |
827 | goto err; | |
828 | } | |
829 | ||
830 | /* | |
831 | * copy the new data into our accumulation buffer. | |
832 | */ | |
d626f62b ACM |
833 | skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), |
834 | skb->len); | |
b038ced7 SW |
835 | ep->mpa_pkt_len += skb->len; |
836 | ||
837 | /* | |
838 | * if we don't even have the mpa message, then bail. | |
839 | */ | |
840 | if (ep->mpa_pkt_len < sizeof(*mpa)) | |
841 | return; | |
842 | mpa = (struct mpa_message *) ep->mpa_pkt; | |
843 | ||
844 | /* Validate MPA header. */ | |
845 | if (mpa->revision != mpa_rev) { | |
846 | err = -EPROTO; | |
847 | goto err; | |
848 | } | |
849 | if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) { | |
850 | err = -EPROTO; | |
851 | goto err; | |
852 | } | |
853 | ||
854 | plen = ntohs(mpa->private_data_size); | |
855 | ||
856 | /* | |
857 | * Fail if there's too much private data. | |
858 | */ | |
859 | if (plen > MPA_MAX_PRIVATE_DATA) { | |
860 | err = -EPROTO; | |
861 | goto err; | |
862 | } | |
863 | ||
864 | /* | |
865 | * If plen does not account for pkt size | |
866 | */ | |
867 | if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { | |
868 | err = -EPROTO; | |
869 | goto err; | |
870 | } | |
871 | ||
872 | ep->plen = (u8) plen; | |
873 | ||
874 | /* | |
875 | * If we don't have all the pdata yet, then bail. | |
876 | * We'll continue process when more data arrives. | |
877 | */ | |
878 | if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) | |
879 | return; | |
880 | ||
881 | if (mpa->flags & MPA_REJECT) { | |
882 | err = -ECONNREFUSED; | |
883 | goto err; | |
884 | } | |
885 | ||
886 | /* | |
887 | * If we get here we have accumulated the entire mpa | |
888 | * start reply message including private data. And | |
889 | * the MPA header is valid. | |
890 | */ | |
891 | state_set(&ep->com, FPDU_MODE); | |
f8b0dfd1 | 892 | ep->mpa_attr.initiator = 1; |
b038ced7 SW |
893 | ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; |
894 | ep->mpa_attr.recv_marker_enabled = markers_enabled; | |
895 | ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; | |
896 | ep->mpa_attr.version = mpa_rev; | |
897 | PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " | |
33718363 | 898 | "xmit_marker_enabled=%d, version=%d\n", __func__, |
b038ced7 SW |
899 | ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, |
900 | ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); | |
901 | ||
902 | attrs.mpa_attr = ep->mpa_attr; | |
903 | attrs.max_ird = ep->ird; | |
904 | attrs.max_ord = ep->ord; | |
905 | attrs.llp_stream_handle = ep; | |
906 | attrs.next_state = IWCH_QP_STATE_RTS; | |
907 | ||
908 | mask = IWCH_QP_ATTR_NEXT_STATE | | |
909 | IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR | | |
910 | IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD; | |
911 | ||
912 | /* bind QP and TID with INIT_WR */ | |
913 | err = iwch_modify_qp(ep->com.qp->rhp, | |
914 | ep->com.qp, mask, &attrs, 1); | |
f8b0dfd1 SW |
915 | if (err) |
916 | goto err; | |
917 | ||
918 | if (peer2peer && iwch_rqes_posted(ep->com.qp) == 0) { | |
919 | iwch_post_zb_read(ep->com.qp); | |
920 | } | |
921 | ||
922 | goto out; | |
b038ced7 SW |
923 | err: |
924 | abort_connection(ep, skb, GFP_KERNEL); | |
925 | out: | |
926 | connect_reply_upcall(ep, err); | |
927 | return; | |
928 | } | |
929 | ||
930 | static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb) | |
931 | { | |
932 | struct mpa_message *mpa; | |
933 | u16 plen; | |
934 | ||
33718363 | 935 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
936 | |
937 | /* | |
938 | * Stop mpa timer. If it expired, then the state has | |
939 | * changed and we bail since ep_timeout already aborted | |
940 | * the connection. | |
941 | */ | |
942 | stop_ep_timer(ep); | |
943 | if (state_read(&ep->com) != MPA_REQ_WAIT) | |
944 | return; | |
945 | ||
946 | /* | |
947 | * If we get more than the supported amount of private data | |
948 | * then we must fail this connection. | |
949 | */ | |
950 | if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { | |
951 | abort_connection(ep, skb, GFP_KERNEL); | |
952 | return; | |
953 | } | |
954 | ||
33718363 | 955 | PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); |
b038ced7 SW |
956 | |
957 | /* | |
958 | * Copy the new data into our accumulation buffer. | |
959 | */ | |
d626f62b ACM |
960 | skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), |
961 | skb->len); | |
b038ced7 SW |
962 | ep->mpa_pkt_len += skb->len; |
963 | ||
964 | /* | |
965 | * If we don't even have the mpa message, then bail. | |
966 | * We'll continue process when more data arrives. | |
967 | */ | |
968 | if (ep->mpa_pkt_len < sizeof(*mpa)) | |
969 | return; | |
33718363 | 970 | PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); |
b038ced7 SW |
971 | mpa = (struct mpa_message *) ep->mpa_pkt; |
972 | ||
973 | /* | |
974 | * Validate MPA Header. | |
975 | */ | |
976 | if (mpa->revision != mpa_rev) { | |
977 | abort_connection(ep, skb, GFP_KERNEL); | |
978 | return; | |
979 | } | |
980 | ||
981 | if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) { | |
982 | abort_connection(ep, skb, GFP_KERNEL); | |
983 | return; | |
984 | } | |
985 | ||
986 | plen = ntohs(mpa->private_data_size); | |
987 | ||
988 | /* | |
989 | * Fail if there's too much private data. | |
990 | */ | |
991 | if (plen > MPA_MAX_PRIVATE_DATA) { | |
992 | abort_connection(ep, skb, GFP_KERNEL); | |
993 | return; | |
994 | } | |
995 | ||
996 | /* | |
997 | * If plen does not account for pkt size | |
998 | */ | |
999 | if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { | |
1000 | abort_connection(ep, skb, GFP_KERNEL); | |
1001 | return; | |
1002 | } | |
1003 | ep->plen = (u8) plen; | |
1004 | ||
1005 | /* | |
1006 | * If we don't have all the pdata yet, then bail. | |
1007 | */ | |
1008 | if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) | |
1009 | return; | |
1010 | ||
1011 | /* | |
1012 | * If we get here we have accumulated the entire mpa | |
1013 | * start reply message including private data. | |
1014 | */ | |
f8b0dfd1 | 1015 | ep->mpa_attr.initiator = 0; |
b038ced7 SW |
1016 | ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; |
1017 | ep->mpa_attr.recv_marker_enabled = markers_enabled; | |
1018 | ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; | |
1019 | ep->mpa_attr.version = mpa_rev; | |
1020 | PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " | |
33718363 | 1021 | "xmit_marker_enabled=%d, version=%d\n", __func__, |
b038ced7 SW |
1022 | ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, |
1023 | ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); | |
1024 | ||
1025 | state_set(&ep->com, MPA_REQ_RCVD); | |
1026 | ||
1027 | /* drive upcall */ | |
1028 | connect_request_upcall(ep); | |
1029 | return; | |
1030 | } | |
1031 | ||
1032 | static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1033 | { | |
1034 | struct iwch_ep *ep = ctx; | |
1035 | struct cpl_rx_data *hdr = cplhdr(skb); | |
1036 | unsigned int dlen = ntohs(hdr->len); | |
1037 | ||
33718363 | 1038 | PDBG("%s ep %p dlen %u\n", __func__, ep, dlen); |
b038ced7 SW |
1039 | |
1040 | skb_pull(skb, sizeof(*hdr)); | |
1041 | skb_trim(skb, dlen); | |
1042 | ||
de3d3530 SW |
1043 | ep->rcv_seq += dlen; |
1044 | BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen)); | |
1045 | ||
b038ced7 SW |
1046 | switch (state_read(&ep->com)) { |
1047 | case MPA_REQ_SENT: | |
1048 | process_mpa_reply(ep, skb); | |
1049 | break; | |
1050 | case MPA_REQ_WAIT: | |
1051 | process_mpa_request(ep, skb); | |
1052 | break; | |
1053 | case MPA_REP_SENT: | |
1054 | break; | |
1055 | default: | |
1056 | printk(KERN_ERR MOD "%s Unexpected streaming data." | |
1057 | " ep %p state %d tid %d\n", | |
33718363 | 1058 | __func__, ep, state_read(&ep->com), ep->hwtid); |
b038ced7 SW |
1059 | |
1060 | /* | |
1061 | * The ep will timeout and inform the ULP of the failure. | |
1062 | * See ep_timeout(). | |
1063 | */ | |
1064 | break; | |
1065 | } | |
1066 | ||
1067 | /* update RX credits */ | |
1068 | update_rx_credits(ep, dlen); | |
1069 | ||
1070 | return CPL_RET_BUF_DONE; | |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | * Upcall from the adapter indicating data has been transmitted. | |
1075 | * For us its just the single MPA request or reply. We can now free | |
1076 | * the skb holding the mpa message. | |
1077 | */ | |
1078 | static int tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1079 | { | |
1080 | struct iwch_ep *ep = ctx; | |
1081 | struct cpl_wr_ack *hdr = cplhdr(skb); | |
1082 | unsigned int credits = ntohs(hdr->credits); | |
b038ced7 | 1083 | |
33718363 | 1084 | PDBG("%s ep %p credits %u\n", __func__, ep, credits); |
b038ced7 | 1085 | |
f8b0dfd1 SW |
1086 | if (credits == 0) { |
1087 | PDBG(KERN_ERR "%s 0 credit ack ep %p state %u\n", | |
1088 | __func__, ep, state_read(&ep->com)); | |
b038ced7 | 1089 | return CPL_RET_BUF_DONE; |
f8b0dfd1 SW |
1090 | } |
1091 | ||
b038ced7 | 1092 | BUG_ON(credits != 1); |
b038ced7 | 1093 | dst_confirm(ep->dst); |
f8b0dfd1 SW |
1094 | if (!ep->mpa_skb) { |
1095 | PDBG("%s rdma_init wr_ack ep %p state %u\n", | |
1096 | __func__, ep, state_read(&ep->com)); | |
1097 | if (ep->mpa_attr.initiator) { | |
1098 | PDBG("%s initiator ep %p state %u\n", | |
1099 | __func__, ep, state_read(&ep->com)); | |
1100 | if (peer2peer) | |
1101 | iwch_post_zb_read(ep->com.qp); | |
1102 | } else { | |
1103 | PDBG("%s responder ep %p state %u\n", | |
1104 | __func__, ep, state_read(&ep->com)); | |
1105 | ep->com.rpl_done = 1; | |
1106 | wake_up(&ep->com.waitq); | |
1107 | } | |
1108 | } else { | |
1109 | PDBG("%s lsm ack ep %p state %u freeing skb\n", | |
1110 | __func__, ep, state_read(&ep->com)); | |
1111 | kfree_skb(ep->mpa_skb); | |
1112 | ep->mpa_skb = NULL; | |
b038ced7 SW |
1113 | } |
1114 | return CPL_RET_BUF_DONE; | |
1115 | } | |
1116 | ||
1117 | static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1118 | { | |
1119 | struct iwch_ep *ep = ctx; | |
989a1780 SW |
1120 | unsigned long flags; |
1121 | int release = 0; | |
b038ced7 | 1122 | |
33718363 | 1123 | PDBG("%s ep %p\n", __func__, ep); |
989a1780 | 1124 | BUG_ON(!ep); |
b038ced7 | 1125 | |
aff9e39d SW |
1126 | /* |
1127 | * We get 2 abort replies from the HW. The first one must | |
1128 | * be ignored except for scribbling that we need one more. | |
1129 | */ | |
1130 | if (!(ep->flags & ABORT_REQ_IN_PROGRESS)) { | |
1131 | ep->flags |= ABORT_REQ_IN_PROGRESS; | |
1132 | return CPL_RET_BUF_DONE; | |
1133 | } | |
1134 | ||
989a1780 SW |
1135 | spin_lock_irqsave(&ep->com.lock, flags); |
1136 | switch (ep->com.state) { | |
1137 | case ABORTING: | |
1138 | close_complete_upcall(ep); | |
1139 | __state_set(&ep->com, DEAD); | |
1140 | release = 1; | |
1141 | break; | |
1142 | default: | |
1143 | printk(KERN_ERR "%s ep %p state %d\n", | |
1144 | __func__, ep, ep->com.state); | |
1145 | break; | |
1146 | } | |
1147 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1148 | ||
1149 | if (release) | |
1150 | release_ep_resources(ep); | |
b038ced7 SW |
1151 | return CPL_RET_BUF_DONE; |
1152 | } | |
1153 | ||
96d0e493 SW |
1154 | /* |
1155 | * Return whether a failed active open has allocated a TID | |
1156 | */ | |
1157 | static inline int act_open_has_tid(int status) | |
1158 | { | |
1159 | return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST && | |
1160 | status != CPL_ERR_ARP_MISS; | |
1161 | } | |
1162 | ||
b038ced7 SW |
1163 | static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
1164 | { | |
1165 | struct iwch_ep *ep = ctx; | |
1166 | struct cpl_act_open_rpl *rpl = cplhdr(skb); | |
1167 | ||
33718363 | 1168 | PDBG("%s ep %p status %u errno %d\n", __func__, ep, rpl->status, |
b038ced7 SW |
1169 | status2errno(rpl->status)); |
1170 | connect_reply_upcall(ep, status2errno(rpl->status)); | |
1171 | state_set(&ep->com, DEAD); | |
8176d297 | 1172 | if (ep->com.tdev->type != T3A && act_open_has_tid(rpl->status)) |
b038ced7 SW |
1173 | release_tid(ep->com.tdev, GET_TID(rpl), NULL); |
1174 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
1175 | dst_release(ep->dst); | |
1176 | l2t_release(L2DATA(ep->com.tdev), ep->l2t); | |
1177 | put_ep(&ep->com); | |
1178 | return CPL_RET_BUF_DONE; | |
1179 | } | |
1180 | ||
1181 | static int listen_start(struct iwch_listen_ep *ep) | |
1182 | { | |
1183 | struct sk_buff *skb; | |
1184 | struct cpl_pass_open_req *req; | |
1185 | ||
33718363 | 1186 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1187 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
1188 | if (!skb) { | |
1189 | printk(KERN_ERR MOD "t3c_listen_start failed to alloc skb!\n"); | |
1190 | return -ENOMEM; | |
1191 | } | |
1192 | ||
1193 | req = (struct cpl_pass_open_req *) skb_put(skb, sizeof(*req)); | |
1194 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1195 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, ep->stid)); | |
1196 | req->local_port = ep->com.local_addr.sin_port; | |
1197 | req->local_ip = ep->com.local_addr.sin_addr.s_addr; | |
1198 | req->peer_port = 0; | |
1199 | req->peer_ip = 0; | |
1200 | req->peer_netmask = 0; | |
1201 | req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS); | |
1202 | req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10)); | |
1203 | req->opt1 = htonl(V_CONN_POLICY(CPL_CONN_POLICY_ASK)); | |
1204 | ||
1205 | skb->priority = 1; | |
699924b1 | 1206 | cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
1207 | return 0; |
1208 | } | |
1209 | ||
1210 | static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1211 | { | |
1212 | struct iwch_listen_ep *ep = ctx; | |
1213 | struct cpl_pass_open_rpl *rpl = cplhdr(skb); | |
1214 | ||
33718363 | 1215 | PDBG("%s ep %p status %d error %d\n", __func__, ep, |
b038ced7 SW |
1216 | rpl->status, status2errno(rpl->status)); |
1217 | ep->com.rpl_err = status2errno(rpl->status); | |
1218 | ep->com.rpl_done = 1; | |
1219 | wake_up(&ep->com.waitq); | |
1220 | ||
1221 | return CPL_RET_BUF_DONE; | |
1222 | } | |
1223 | ||
1224 | static int listen_stop(struct iwch_listen_ep *ep) | |
1225 | { | |
1226 | struct sk_buff *skb; | |
1227 | struct cpl_close_listserv_req *req; | |
1228 | ||
33718363 | 1229 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1230 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
1231 | if (!skb) { | |
33718363 | 1232 | printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); |
b038ced7 SW |
1233 | return -ENOMEM; |
1234 | } | |
1235 | req = (struct cpl_close_listserv_req *) skb_put(skb, sizeof(*req)); | |
1236 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
60be4b59 | 1237 | req->cpu_idx = 0; |
b038ced7 SW |
1238 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid)); |
1239 | skb->priority = 1; | |
699924b1 | 1240 | cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
1241 | return 0; |
1242 | } | |
1243 | ||
1244 | static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb, | |
1245 | void *ctx) | |
1246 | { | |
1247 | struct iwch_listen_ep *ep = ctx; | |
1248 | struct cpl_close_listserv_rpl *rpl = cplhdr(skb); | |
1249 | ||
33718363 | 1250 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1251 | ep->com.rpl_err = status2errno(rpl->status); |
1252 | ep->com.rpl_done = 1; | |
1253 | wake_up(&ep->com.waitq); | |
1254 | return CPL_RET_BUF_DONE; | |
1255 | } | |
1256 | ||
1257 | static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb) | |
1258 | { | |
1259 | struct cpl_pass_accept_rpl *rpl; | |
1260 | unsigned int mtu_idx; | |
1261 | u32 opt0h, opt0l, opt2; | |
1262 | int wscale; | |
1263 | ||
33718363 | 1264 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1265 | BUG_ON(skb_cloned(skb)); |
1266 | skb_trim(skb, sizeof(*rpl)); | |
1267 | skb_get(skb); | |
1268 | mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); | |
1269 | wscale = compute_wscale(rcv_win); | |
1270 | opt0h = V_NAGLE(0) | | |
1271 | V_NO_CONG(nocong) | | |
1272 | V_KEEP_ALIVE(1) | | |
1273 | F_TCAM_BYPASS | | |
1274 | V_WND_SCALE(wscale) | | |
1275 | V_MSS_IDX(mtu_idx) | | |
1276 | V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); | |
1277 | opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); | |
1278 | opt2 = V_FLAVORS_VALID(1) | V_CONG_CONTROL_FLAVOR(cong_flavor); | |
1279 | ||
1280 | rpl = cplhdr(skb); | |
1281 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1282 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid)); | |
1283 | rpl->peer_ip = peer_ip; | |
1284 | rpl->opt0h = htonl(opt0h); | |
1285 | rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT); | |
1286 | rpl->opt2 = htonl(opt2); | |
1287 | rpl->rsvd = rpl->opt2; /* workaround for HW bug */ | |
1288 | skb->priority = CPL_PRIORITY_SETUP; | |
1289 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
1290 | ||
1291 | return; | |
1292 | } | |
1293 | ||
1294 | static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip, | |
1295 | struct sk_buff *skb) | |
1296 | { | |
33718363 | 1297 | PDBG("%s t3cdev %p tid %u peer_ip %x\n", __func__, tdev, hwtid, |
b038ced7 SW |
1298 | peer_ip); |
1299 | BUG_ON(skb_cloned(skb)); | |
1300 | skb_trim(skb, sizeof(struct cpl_tid_release)); | |
1301 | skb_get(skb); | |
1302 | ||
8176d297 | 1303 | if (tdev->type != T3A) |
b038ced7 SW |
1304 | release_tid(tdev, hwtid, skb); |
1305 | else { | |
1306 | struct cpl_pass_accept_rpl *rpl; | |
1307 | ||
1308 | rpl = cplhdr(skb); | |
1309 | skb->priority = CPL_PRIORITY_SETUP; | |
1310 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1311 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, | |
1312 | hwtid)); | |
1313 | rpl->peer_ip = peer_ip; | |
1314 | rpl->opt0h = htonl(F_TCAM_BYPASS); | |
1315 | rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT); | |
1316 | rpl->opt2 = 0; | |
1317 | rpl->rsvd = rpl->opt2; | |
699924b1 | 1318 | cxgb3_ofld_send(tdev, skb); |
b038ced7 SW |
1319 | } |
1320 | } | |
1321 | ||
1322 | static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1323 | { | |
1324 | struct iwch_ep *child_ep, *parent_ep = ctx; | |
1325 | struct cpl_pass_accept_req *req = cplhdr(skb); | |
1326 | unsigned int hwtid = GET_TID(req); | |
1327 | struct dst_entry *dst; | |
1328 | struct l2t_entry *l2t; | |
1329 | struct rtable *rt; | |
1330 | struct iff_mac tim; | |
1331 | ||
33718363 | 1332 | PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid); |
b038ced7 SW |
1333 | |
1334 | if (state_read(&parent_ep->com) != LISTEN) { | |
1335 | printk(KERN_ERR "%s - listening ep not in LISTEN\n", | |
33718363 | 1336 | __func__); |
b038ced7 SW |
1337 | goto reject; |
1338 | } | |
1339 | ||
1340 | /* | |
1341 | * Find the netdev for this connection request. | |
1342 | */ | |
1343 | tim.mac_addr = req->dst_mac; | |
1344 | tim.vlan_tag = ntohs(req->vlan_tag); | |
1345 | if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) { | |
1346 | printk(KERN_ERR | |
1347 | "%s bad dst mac %02x %02x %02x %02x %02x %02x\n", | |
33718363 | 1348 | __func__, |
b038ced7 SW |
1349 | req->dst_mac[0], |
1350 | req->dst_mac[1], | |
1351 | req->dst_mac[2], | |
1352 | req->dst_mac[3], | |
1353 | req->dst_mac[4], | |
1354 | req->dst_mac[5]); | |
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 | } | |
1369 | dst = &rt->u.dst; | |
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 | |
1453 | * rejects the CR. | |
1454 | */ | |
1455 | __state_set(&ep->com, CLOSING); | |
1456 | get_ep(&ep->com); | |
1457 | break; | |
1458 | case MPA_REP_SENT: | |
1459 | __state_set(&ep->com, CLOSING); | |
1460 | ep->com.rpl_done = 1; | |
1461 | ep->com.rpl_err = -ECONNRESET; | |
1462 | PDBG("waking up ep %p\n", ep); | |
1463 | wake_up(&ep->com.waitq); | |
1464 | break; | |
1465 | case FPDU_MODE: | |
42e31753 | 1466 | start_ep_timer(ep); |
b038ced7 SW |
1467 | __state_set(&ep->com, CLOSING); |
1468 | attrs.next_state = IWCH_QP_STATE_CLOSING; | |
1469 | iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, | |
1470 | IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); | |
1471 | peer_close_upcall(ep); | |
1472 | break; | |
1473 | case ABORTING: | |
1474 | disconnect = 0; | |
1475 | break; | |
1476 | case CLOSING: | |
b038ced7 SW |
1477 | __state_set(&ep->com, MORIBUND); |
1478 | disconnect = 0; | |
1479 | break; | |
1480 | case MORIBUND: | |
1481 | stop_ep_timer(ep); | |
1482 | if (ep->com.cm_id && ep->com.qp) { | |
1483 | attrs.next_state = IWCH_QP_STATE_IDLE; | |
1484 | iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, | |
1485 | IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); | |
1486 | } | |
1487 | close_complete_upcall(ep); | |
1488 | __state_set(&ep->com, DEAD); | |
1489 | release = 1; | |
1490 | disconnect = 0; | |
1491 | break; | |
1492 | case DEAD: | |
1493 | disconnect = 0; | |
1494 | break; | |
1495 | default: | |
1496 | BUG_ON(1); | |
1497 | } | |
1498 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1499 | if (disconnect) | |
1500 | iwch_ep_disconnect(ep, 0, GFP_KERNEL); | |
1501 | if (release) | |
1502 | release_ep_resources(ep); | |
1503 | return CPL_RET_BUF_DONE; | |
1504 | } | |
1505 | ||
1506 | /* | |
1507 | * Returns whether an ABORT_REQ_RSS message is a negative advice. | |
1508 | */ | |
2b540355 | 1509 | static int is_neg_adv_abort(unsigned int status) |
b038ced7 SW |
1510 | { |
1511 | return status == CPL_ERR_RTX_NEG_ADVICE || | |
1512 | status == CPL_ERR_PERSIST_NEG_ADVICE; | |
1513 | } | |
1514 | ||
1515 | static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1516 | { | |
1517 | struct cpl_abort_req_rss *req = cplhdr(skb); | |
1518 | struct iwch_ep *ep = ctx; | |
1519 | struct cpl_abort_rpl *rpl; | |
1520 | struct sk_buff *rpl_skb; | |
1521 | struct iwch_qp_attributes attrs; | |
1522 | int ret; | |
989a1780 SW |
1523 | int release = 0; |
1524 | unsigned long flags; | |
b038ced7 | 1525 | |
1580367e | 1526 | if (is_neg_adv_abort(req->status)) { |
33718363 | 1527 | PDBG("%s neg_adv_abort ep %p tid %d\n", __func__, ep, |
1580367e SW |
1528 | ep->hwtid); |
1529 | t3_l2t_send_event(ep->com.tdev, ep->l2t); | |
1530 | return CPL_RET_BUF_DONE; | |
1531 | } | |
1532 | ||
aff9e39d SW |
1533 | /* |
1534 | * We get 2 peer aborts from the HW. The first one must | |
1535 | * be ignored except for scribbling that we need one more. | |
1536 | */ | |
1537 | if (!(ep->flags & PEER_ABORT_IN_PROGRESS)) { | |
1538 | ep->flags |= PEER_ABORT_IN_PROGRESS; | |
1539 | return CPL_RET_BUF_DONE; | |
1540 | } | |
1541 | ||
989a1780 SW |
1542 | spin_lock_irqsave(&ep->com.lock, flags); |
1543 | PDBG("%s ep %p state %u\n", __func__, ep, ep->com.state); | |
1544 | switch (ep->com.state) { | |
b038ced7 SW |
1545 | case CONNECTING: |
1546 | break; | |
1547 | case MPA_REQ_WAIT: | |
adf376b3 | 1548 | stop_ep_timer(ep); |
b038ced7 SW |
1549 | break; |
1550 | case MPA_REQ_SENT: | |
adf376b3 | 1551 | stop_ep_timer(ep); |
b038ced7 SW |
1552 | connect_reply_upcall(ep, -ECONNRESET); |
1553 | break; | |
1554 | case MPA_REP_SENT: | |
1555 | ep->com.rpl_done = 1; | |
1556 | ep->com.rpl_err = -ECONNRESET; | |
1557 | PDBG("waking up ep %p\n", ep); | |
1558 | wake_up(&ep->com.waitq); | |
1559 | break; | |
1560 | case MPA_REQ_RCVD: | |
1561 | ||
1562 | /* | |
1563 | * We're gonna mark this puppy DEAD, but keep | |
1564 | * the reference on it until the ULP accepts or | |
1565 | * rejects the CR. | |
1566 | */ | |
1567 | get_ep(&ep->com); | |
1568 | break; | |
1569 | case MORIBUND: | |
42e31753 | 1570 | case CLOSING: |
b038ced7 | 1571 | stop_ep_timer(ep); |
42e31753 | 1572 | /*FALLTHROUGH*/ |
b038ced7 | 1573 | case FPDU_MODE: |
b038ced7 SW |
1574 | if (ep->com.cm_id && ep->com.qp) { |
1575 | attrs.next_state = IWCH_QP_STATE_ERROR; | |
1576 | ret = iwch_modify_qp(ep->com.qp->rhp, | |
1577 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1578 | &attrs, 1); | |
1579 | if (ret) | |
1580 | printk(KERN_ERR MOD | |
1581 | "%s - qp <- error failed!\n", | |
33718363 | 1582 | __func__); |
b038ced7 SW |
1583 | } |
1584 | peer_abort_upcall(ep); | |
1585 | break; | |
1586 | case ABORTING: | |
1587 | break; | |
1588 | case DEAD: | |
33718363 | 1589 | PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__); |
989a1780 | 1590 | spin_unlock_irqrestore(&ep->com.lock, flags); |
b038ced7 SW |
1591 | return CPL_RET_BUF_DONE; |
1592 | default: | |
1593 | BUG_ON(1); | |
1594 | break; | |
1595 | } | |
1596 | dst_confirm(ep->dst); | |
989a1780 SW |
1597 | if (ep->com.state != ABORTING) { |
1598 | __state_set(&ep->com, DEAD); | |
1599 | release = 1; | |
1600 | } | |
1601 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
b038ced7 SW |
1602 | |
1603 | rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL); | |
1604 | if (!rpl_skb) { | |
1605 | printk(KERN_ERR MOD "%s - cannot allocate skb!\n", | |
33718363 | 1606 | __func__); |
989a1780 SW |
1607 | release = 1; |
1608 | goto out; | |
b038ced7 SW |
1609 | } |
1610 | rpl_skb->priority = CPL_PRIORITY_DATA; | |
1611 | rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl)); | |
1612 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); | |
1613 | rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
1614 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid)); | |
1615 | rpl->cmd = CPL_ABORT_NO_RST; | |
699924b1 | 1616 | cxgb3_ofld_send(ep->com.tdev, rpl_skb); |
989a1780 SW |
1617 | out: |
1618 | if (release) | |
b038ced7 | 1619 | release_ep_resources(ep); |
b038ced7 SW |
1620 | return CPL_RET_BUF_DONE; |
1621 | } | |
1622 | ||
1623 | static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1624 | { | |
1625 | struct iwch_ep *ep = ctx; | |
1626 | struct iwch_qp_attributes attrs; | |
1627 | unsigned long flags; | |
1628 | int release = 0; | |
1629 | ||
33718363 | 1630 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1631 | BUG_ON(!ep); |
1632 | ||
1633 | /* The cm_id may be null if we failed to connect */ | |
1634 | spin_lock_irqsave(&ep->com.lock, flags); | |
1635 | switch (ep->com.state) { | |
1636 | case CLOSING: | |
b038ced7 SW |
1637 | __state_set(&ep->com, MORIBUND); |
1638 | break; | |
1639 | case MORIBUND: | |
1640 | stop_ep_timer(ep); | |
1641 | if ((ep->com.cm_id) && (ep->com.qp)) { | |
1642 | attrs.next_state = IWCH_QP_STATE_IDLE; | |
1643 | iwch_modify_qp(ep->com.qp->rhp, | |
1644 | ep->com.qp, | |
1645 | IWCH_QP_ATTR_NEXT_STATE, | |
1646 | &attrs, 1); | |
1647 | } | |
1648 | close_complete_upcall(ep); | |
1649 | __state_set(&ep->com, DEAD); | |
1650 | release = 1; | |
1651 | break; | |
42e31753 | 1652 | case ABORTING: |
b038ced7 | 1653 | case DEAD: |
c4d49776 | 1654 | break; |
b038ced7 SW |
1655 | default: |
1656 | BUG_ON(1); | |
1657 | break; | |
1658 | } | |
1659 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1660 | if (release) | |
1661 | release_ep_resources(ep); | |
1662 | return CPL_RET_BUF_DONE; | |
1663 | } | |
1664 | ||
1665 | /* | |
1666 | * T3A does 3 things when a TERM is received: | |
1667 | * 1) send up a CPL_RDMA_TERMINATE message with the TERM packet | |
1668 | * 2) generate an async event on the QP with the TERMINATE opcode | |
1669 | * 3) post a TERMINATE opcde cqe into the associated CQ. | |
1670 | * | |
1671 | * For (1), we save the message in the qp for later consumer consumption. | |
1672 | * For (2), we move the QP into TERMINATE, post a QP event and disconnect. | |
1673 | * For (3), we toss the CQE in cxio_poll_cq(). | |
1674 | * | |
1675 | * terminate() handles case (1)... | |
1676 | */ | |
1677 | static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1678 | { | |
1679 | struct iwch_ep *ep = ctx; | |
1680 | ||
33718363 | 1681 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 | 1682 | skb_pull(skb, sizeof(struct cpl_rdma_terminate)); |
33718363 | 1683 | PDBG("%s saving %d bytes of term msg\n", __func__, skb->len); |
d626f62b ACM |
1684 | skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer, |
1685 | skb->len); | |
b038ced7 SW |
1686 | ep->com.qp->attr.terminate_msg_len = skb->len; |
1687 | ep->com.qp->attr.is_terminate_local = 0; | |
1688 | return CPL_RET_BUF_DONE; | |
1689 | } | |
1690 | ||
1691 | static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1692 | { | |
1693 | struct cpl_rdma_ec_status *rep = cplhdr(skb); | |
1694 | struct iwch_ep *ep = ctx; | |
1695 | ||
33718363 | 1696 | PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, |
b038ced7 SW |
1697 | rep->status); |
1698 | if (rep->status) { | |
1699 | struct iwch_qp_attributes attrs; | |
1700 | ||
1701 | printk(KERN_ERR MOD "%s BAD CLOSE - Aborting tid %u\n", | |
33718363 | 1702 | __func__, ep->hwtid); |
2f236735 | 1703 | stop_ep_timer(ep); |
b038ced7 SW |
1704 | attrs.next_state = IWCH_QP_STATE_ERROR; |
1705 | iwch_modify_qp(ep->com.qp->rhp, | |
1706 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1707 | &attrs, 1); | |
1708 | abort_connection(ep, NULL, GFP_KERNEL); | |
1709 | } | |
1710 | return CPL_RET_BUF_DONE; | |
1711 | } | |
1712 | ||
1713 | static void ep_timeout(unsigned long arg) | |
1714 | { | |
1715 | struct iwch_ep *ep = (struct iwch_ep *)arg; | |
1716 | struct iwch_qp_attributes attrs; | |
1717 | unsigned long flags; | |
989a1780 | 1718 | int abort = 1; |
b038ced7 SW |
1719 | |
1720 | spin_lock_irqsave(&ep->com.lock, flags); | |
33718363 | 1721 | PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid, |
b038ced7 SW |
1722 | ep->com.state); |
1723 | switch (ep->com.state) { | |
1724 | case MPA_REQ_SENT: | |
989a1780 | 1725 | __state_set(&ep->com, ABORTING); |
b038ced7 SW |
1726 | connect_reply_upcall(ep, -ETIMEDOUT); |
1727 | break; | |
1728 | case MPA_REQ_WAIT: | |
989a1780 | 1729 | __state_set(&ep->com, ABORTING); |
b038ced7 | 1730 | break; |
42e31753 | 1731 | case CLOSING: |
b038ced7 SW |
1732 | case MORIBUND: |
1733 | if (ep->com.cm_id && ep->com.qp) { | |
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 | } | |
989a1780 | 1739 | __state_set(&ep->com, ABORTING); |
b038ced7 SW |
1740 | break; |
1741 | default: | |
989a1780 SW |
1742 | printk(KERN_ERR "%s unexpected state ep %p state %u\n", |
1743 | __func__, ep, ep->com.state); | |
1744 | WARN_ON(1); | |
1745 | abort = 0; | |
b038ced7 | 1746 | } |
b038ced7 | 1747 | spin_unlock_irqrestore(&ep->com.lock, flags); |
989a1780 SW |
1748 | if (abort) |
1749 | abort_connection(ep, NULL, GFP_ATOMIC); | |
b038ced7 SW |
1750 | put_ep(&ep->com); |
1751 | } | |
1752 | ||
1753 | int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) | |
1754 | { | |
1755 | int err; | |
1756 | struct iwch_ep *ep = to_ep(cm_id); | |
33718363 | 1757 | PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
b038ced7 SW |
1758 | |
1759 | if (state_read(&ep->com) == DEAD) { | |
1760 | put_ep(&ep->com); | |
1761 | return -ECONNRESET; | |
1762 | } | |
1763 | BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); | |
b038ced7 SW |
1764 | if (mpa_rev == 0) |
1765 | abort_connection(ep, NULL, GFP_KERNEL); | |
1766 | else { | |
1767 | err = send_mpa_reject(ep, pdata, pdata_len); | |
7d526e6b | 1768 | err = iwch_ep_disconnect(ep, 0, GFP_KERNEL); |
b038ced7 SW |
1769 | } |
1770 | return 0; | |
1771 | } | |
1772 | ||
1773 | int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
1774 | { | |
1775 | int err; | |
1776 | struct iwch_qp_attributes attrs; | |
1777 | enum iwch_qp_attr_mask mask; | |
1778 | struct iwch_ep *ep = to_ep(cm_id); | |
1779 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1780 | struct iwch_qp *qp = get_qhp(h, conn_param->qpn); | |
1781 | ||
33718363 | 1782 | PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
de3d3530 | 1783 | if (state_read(&ep->com) == DEAD) |
b038ced7 | 1784 | return -ECONNRESET; |
b038ced7 SW |
1785 | |
1786 | BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); | |
1787 | BUG_ON(!qp); | |
1788 | ||
1789 | if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) || | |
1790 | (conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) { | |
1791 | abort_connection(ep, NULL, GFP_KERNEL); | |
1792 | return -EINVAL; | |
1793 | } | |
1794 | ||
1795 | cm_id->add_ref(cm_id); | |
1796 | ep->com.cm_id = cm_id; | |
1797 | ep->com.qp = qp; | |
1798 | ||
1799 | ep->com.rpl_done = 0; | |
1800 | ep->com.rpl_err = 0; | |
1801 | ep->ird = conn_param->ird; | |
1802 | ep->ord = conn_param->ord; | |
33718363 | 1803 | PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord); |
de3d3530 | 1804 | |
b038ced7 | 1805 | get_ep(&ep->com); |
b038ced7 SW |
1806 | |
1807 | /* bind QP to EP and move to RTS */ | |
1808 | attrs.mpa_attr = ep->mpa_attr; | |
1f71f503 | 1809 | attrs.max_ird = ep->ird; |
b038ced7 SW |
1810 | attrs.max_ord = ep->ord; |
1811 | attrs.llp_stream_handle = ep; | |
1812 | attrs.next_state = IWCH_QP_STATE_RTS; | |
1813 | ||
1814 | /* bind QP and TID with INIT_WR */ | |
1815 | mask = IWCH_QP_ATTR_NEXT_STATE | | |
1816 | IWCH_QP_ATTR_LLP_STREAM_HANDLE | | |
1817 | IWCH_QP_ATTR_MPA_ATTR | | |
1818 | IWCH_QP_ATTR_MAX_IRD | | |
1819 | IWCH_QP_ATTR_MAX_ORD; | |
1820 | ||
1821 | err = iwch_modify_qp(ep->com.qp->rhp, | |
1822 | ep->com.qp, mask, &attrs, 1); | |
de3d3530 SW |
1823 | if (err) |
1824 | goto err; | |
b038ced7 | 1825 | |
f8b0dfd1 SW |
1826 | /* if needed, wait for wr_ack */ |
1827 | if (iwch_rqes_posted(qp)) { | |
1828 | wait_event(ep->com.waitq, ep->com.rpl_done); | |
1829 | err = ep->com.rpl_err; | |
1830 | if (err) | |
1831 | goto err; | |
1832 | } | |
1833 | ||
de3d3530 SW |
1834 | err = send_mpa_reply(ep, conn_param->private_data, |
1835 | conn_param->private_data_len); | |
1836 | if (err) | |
1837 | goto err; | |
1838 | ||
de3d3530 SW |
1839 | |
1840 | state_set(&ep->com, FPDU_MODE); | |
1841 | established_upcall(ep); | |
1842 | put_ep(&ep->com); | |
1843 | return 0; | |
1844 | err: | |
1845 | ep->com.cm_id = NULL; | |
1846 | ep->com.qp = NULL; | |
1847 | cm_id->rem_ref(cm_id); | |
b038ced7 SW |
1848 | put_ep(&ep->com); |
1849 | return err; | |
1850 | } | |
1851 | ||
8704e9a8 SW |
1852 | static int is_loopback_dst(struct iw_cm_id *cm_id) |
1853 | { | |
1854 | struct net_device *dev; | |
1855 | ||
1856 | dev = ip_dev_find(&init_net, cm_id->remote_addr.sin_addr.s_addr); | |
1857 | if (!dev) | |
1858 | return 0; | |
1859 | dev_put(dev); | |
1860 | return 1; | |
1861 | } | |
1862 | ||
b038ced7 SW |
1863 | int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
1864 | { | |
1865 | int err = 0; | |
1866 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1867 | struct iwch_ep *ep; | |
1868 | struct rtable *rt; | |
1869 | ||
8704e9a8 SW |
1870 | if (is_loopback_dst(cm_id)) { |
1871 | err = -ENOSYS; | |
1872 | goto out; | |
1873 | } | |
1874 | ||
b038ced7 SW |
1875 | ep = alloc_ep(sizeof(*ep), GFP_KERNEL); |
1876 | if (!ep) { | |
33718363 | 1877 | printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); |
b038ced7 SW |
1878 | err = -ENOMEM; |
1879 | goto out; | |
1880 | } | |
1881 | init_timer(&ep->timer); | |
1882 | ep->plen = conn_param->private_data_len; | |
1883 | if (ep->plen) | |
1884 | memcpy(ep->mpa_pkt + sizeof(struct mpa_message), | |
1885 | conn_param->private_data, ep->plen); | |
1886 | ep->ird = conn_param->ird; | |
1887 | ep->ord = conn_param->ord; | |
1888 | ep->com.tdev = h->rdev.t3cdev_p; | |
1889 | ||
1890 | cm_id->add_ref(cm_id); | |
1891 | ep->com.cm_id = cm_id; | |
1892 | ep->com.qp = get_qhp(h, conn_param->qpn); | |
1893 | BUG_ON(!ep->com.qp); | |
33718363 | 1894 | PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn, |
b038ced7 SW |
1895 | ep->com.qp, cm_id); |
1896 | ||
1897 | /* | |
1898 | * Allocate an active TID to initiate a TCP connection. | |
1899 | */ | |
1900 | ep->atid = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep); | |
1901 | if (ep->atid == -1) { | |
33718363 | 1902 | printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); |
b038ced7 SW |
1903 | err = -ENOMEM; |
1904 | goto fail2; | |
1905 | } | |
1906 | ||
1907 | /* find a route */ | |
1908 | rt = find_route(h->rdev.t3cdev_p, | |
1909 | cm_id->local_addr.sin_addr.s_addr, | |
1910 | cm_id->remote_addr.sin_addr.s_addr, | |
1911 | cm_id->local_addr.sin_port, | |
1912 | cm_id->remote_addr.sin_port, IPTOS_LOWDELAY); | |
1913 | if (!rt) { | |
33718363 | 1914 | printk(KERN_ERR MOD "%s - cannot find route.\n", __func__); |
b038ced7 SW |
1915 | err = -EHOSTUNREACH; |
1916 | goto fail3; | |
1917 | } | |
1918 | ep->dst = &rt->u.dst; | |
1919 | ||
1920 | /* get a l2t entry */ | |
1921 | ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst->neighbour, | |
1922 | ep->dst->neighbour->dev); | |
1923 | if (!ep->l2t) { | |
33718363 | 1924 | printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__); |
b038ced7 SW |
1925 | err = -ENOMEM; |
1926 | goto fail4; | |
1927 | } | |
1928 | ||
1929 | state_set(&ep->com, CONNECTING); | |
1930 | ep->tos = IPTOS_LOWDELAY; | |
1931 | ep->com.local_addr = cm_id->local_addr; | |
1932 | ep->com.remote_addr = cm_id->remote_addr; | |
1933 | ||
1934 | /* send connect request to rnic */ | |
1935 | err = send_connect(ep); | |
1936 | if (!err) | |
1937 | goto out; | |
1938 | ||
1939 | l2t_release(L2DATA(h->rdev.t3cdev_p), ep->l2t); | |
1940 | fail4: | |
1941 | dst_release(ep->dst); | |
1942 | fail3: | |
1943 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
1944 | fail2: | |
dc35fac9 | 1945 | cm_id->rem_ref(cm_id); |
b038ced7 SW |
1946 | put_ep(&ep->com); |
1947 | out: | |
1948 | return err; | |
1949 | } | |
1950 | ||
1951 | int iwch_create_listen(struct iw_cm_id *cm_id, int backlog) | |
1952 | { | |
1953 | int err = 0; | |
1954 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1955 | struct iwch_listen_ep *ep; | |
1956 | ||
1957 | ||
1958 | might_sleep(); | |
1959 | ||
1960 | ep = alloc_ep(sizeof(*ep), GFP_KERNEL); | |
1961 | if (!ep) { | |
33718363 | 1962 | printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); |
b038ced7 SW |
1963 | err = -ENOMEM; |
1964 | goto fail1; | |
1965 | } | |
33718363 | 1966 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1967 | ep->com.tdev = h->rdev.t3cdev_p; |
1968 | cm_id->add_ref(cm_id); | |
1969 | ep->com.cm_id = cm_id; | |
1970 | ep->backlog = backlog; | |
1971 | ep->com.local_addr = cm_id->local_addr; | |
1972 | ||
1973 | /* | |
1974 | * Allocate a server TID. | |
1975 | */ | |
1976 | ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep); | |
1977 | if (ep->stid == -1) { | |
33718363 | 1978 | printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); |
b038ced7 SW |
1979 | err = -ENOMEM; |
1980 | goto fail2; | |
1981 | } | |
1982 | ||
1983 | state_set(&ep->com, LISTEN); | |
1984 | err = listen_start(ep); | |
1985 | if (err) | |
1986 | goto fail3; | |
1987 | ||
1988 | /* wait for pass_open_rpl */ | |
1989 | wait_event(ep->com.waitq, ep->com.rpl_done); | |
1990 | err = ep->com.rpl_err; | |
1991 | if (!err) { | |
1992 | cm_id->provider_data = ep; | |
1993 | goto out; | |
1994 | } | |
1995 | fail3: | |
1996 | cxgb3_free_stid(ep->com.tdev, ep->stid); | |
1997 | fail2: | |
1b07db70 | 1998 | cm_id->rem_ref(cm_id); |
b038ced7 SW |
1999 | put_ep(&ep->com); |
2000 | fail1: | |
2001 | out: | |
2002 | return err; | |
2003 | } | |
2004 | ||
2005 | int iwch_destroy_listen(struct iw_cm_id *cm_id) | |
2006 | { | |
2007 | int err; | |
2008 | struct iwch_listen_ep *ep = to_listen_ep(cm_id); | |
2009 | ||
33718363 | 2010 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
2011 | |
2012 | might_sleep(); | |
2013 | state_set(&ep->com, DEAD); | |
2014 | ep->com.rpl_done = 0; | |
2015 | ep->com.rpl_err = 0; | |
2016 | err = listen_stop(ep); | |
2017 | wait_event(ep->com.waitq, ep->com.rpl_done); | |
2018 | cxgb3_free_stid(ep->com.tdev, ep->stid); | |
2019 | err = ep->com.rpl_err; | |
2020 | cm_id->rem_ref(cm_id); | |
2021 | put_ep(&ep->com); | |
2022 | return err; | |
2023 | } | |
2024 | ||
2025 | int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp) | |
2026 | { | |
2027 | int ret=0; | |
2028 | unsigned long flags; | |
2029 | int close = 0; | |
2030 | ||
2031 | spin_lock_irqsave(&ep->com.lock, flags); | |
2032 | ||
33718363 | 2033 | PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep, |
b038ced7 SW |
2034 | states[ep->com.state], abrupt); |
2035 | ||
b038ced7 SW |
2036 | switch (ep->com.state) { |
2037 | case MPA_REQ_WAIT: | |
2038 | case MPA_REQ_SENT: | |
2039 | case MPA_REQ_RCVD: | |
2040 | case MPA_REP_SENT: | |
2041 | case FPDU_MODE: | |
b038ced7 | 2042 | close = 1; |
989a1780 SW |
2043 | if (abrupt) |
2044 | ep->com.state = ABORTING; | |
2045 | else { | |
2046 | ep->com.state = CLOSING; | |
2047 | start_ep_timer(ep); | |
2048 | } | |
b038ced7 SW |
2049 | break; |
2050 | case CLOSING: | |
b038ced7 | 2051 | close = 1; |
989a1780 SW |
2052 | if (abrupt) { |
2053 | stop_ep_timer(ep); | |
2054 | ep->com.state = ABORTING; | |
2055 | } else | |
2056 | ep->com.state = MORIBUND; | |
b038ced7 SW |
2057 | break; |
2058 | case MORIBUND: | |
989a1780 SW |
2059 | case ABORTING: |
2060 | case DEAD: | |
2061 | PDBG("%s ignoring disconnect ep %p state %u\n", | |
2062 | __func__, ep, ep->com.state); | |
b038ced7 SW |
2063 | break; |
2064 | default: | |
2065 | BUG(); | |
2066 | break; | |
2067 | } | |
989a1780 | 2068 | |
b038ced7 SW |
2069 | spin_unlock_irqrestore(&ep->com.lock, flags); |
2070 | if (close) { | |
2071 | if (abrupt) | |
2072 | ret = send_abort(ep, NULL, gfp); | |
2073 | else | |
2074 | ret = send_halfclose(ep, gfp); | |
2075 | } | |
2076 | return ret; | |
2077 | } | |
2078 | ||
2079 | int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, | |
2080 | struct l2t_entry *l2t) | |
2081 | { | |
2082 | struct iwch_ep *ep = ctx; | |
2083 | ||
2084 | if (ep->dst != old) | |
2085 | return 0; | |
2086 | ||
33718363 | 2087 | PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new, |
b038ced7 SW |
2088 | l2t); |
2089 | dst_hold(new); | |
2090 | l2t_release(L2DATA(ep->com.tdev), ep->l2t); | |
2091 | ep->l2t = l2t; | |
2092 | dst_release(old); | |
2093 | ep->dst = new; | |
2094 | return 1; | |
2095 | } | |
2096 | ||
2097 | /* | |
2098 | * All the CM events are handled on a work queue to have a safe context. | |
2099 | */ | |
2100 | static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
2101 | { | |
2102 | struct iwch_ep_common *epc = ctx; | |
2103 | ||
2104 | get_ep(epc); | |
2105 | ||
2106 | /* | |
2107 | * Save ctx and tdev in the skb->cb area. | |
2108 | */ | |
2109 | *((void **) skb->cb) = ctx; | |
2110 | *((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev; | |
2111 | ||
2112 | /* | |
2113 | * Queue the skb and schedule the worker thread. | |
2114 | */ | |
2115 | skb_queue_tail(&rxq, skb); | |
2116 | queue_work(workq, &skb_work); | |
2117 | return 0; | |
2118 | } | |
2119 | ||
1ca19770 SW |
2120 | static int set_tcb_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
2121 | { | |
2122 | struct cpl_set_tcb_rpl *rpl = cplhdr(skb); | |
2123 | ||
2124 | if (rpl->status != CPL_ERR_NONE) { | |
2125 | printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u " | |
2126 | "for tid %u\n", rpl->status, GET_TID(rpl)); | |
2127 | } | |
2128 | return CPL_RET_BUF_DONE; | |
2129 | } | |
2130 | ||
b038ced7 SW |
2131 | int __init iwch_cm_init(void) |
2132 | { | |
2133 | skb_queue_head_init(&rxq); | |
2134 | ||
2135 | workq = create_singlethread_workqueue("iw_cxgb3"); | |
2136 | if (!workq) | |
2137 | return -ENOMEM; | |
2138 | ||
2139 | /* | |
2140 | * All upcalls from the T3 Core go to sched() to | |
2141 | * schedule the processing on a work queue. | |
2142 | */ | |
2143 | t3c_handlers[CPL_ACT_ESTABLISH] = sched; | |
2144 | t3c_handlers[CPL_ACT_OPEN_RPL] = sched; | |
2145 | t3c_handlers[CPL_RX_DATA] = sched; | |
2146 | t3c_handlers[CPL_TX_DMA_ACK] = sched; | |
2147 | t3c_handlers[CPL_ABORT_RPL_RSS] = sched; | |
2148 | t3c_handlers[CPL_ABORT_RPL] = sched; | |
2149 | t3c_handlers[CPL_PASS_OPEN_RPL] = sched; | |
2150 | t3c_handlers[CPL_CLOSE_LISTSRV_RPL] = sched; | |
2151 | t3c_handlers[CPL_PASS_ACCEPT_REQ] = sched; | |
2152 | t3c_handlers[CPL_PASS_ESTABLISH] = sched; | |
2153 | t3c_handlers[CPL_PEER_CLOSE] = sched; | |
2154 | t3c_handlers[CPL_CLOSE_CON_RPL] = sched; | |
2155 | t3c_handlers[CPL_ABORT_REQ_RSS] = sched; | |
2156 | t3c_handlers[CPL_RDMA_TERMINATE] = sched; | |
2157 | t3c_handlers[CPL_RDMA_EC_STATUS] = sched; | |
1ca19770 | 2158 | t3c_handlers[CPL_SET_TCB_RPL] = set_tcb_rpl; |
b038ced7 SW |
2159 | |
2160 | /* | |
2161 | * These are the real handlers that are called from a | |
2162 | * work queue. | |
2163 | */ | |
2164 | work_handlers[CPL_ACT_ESTABLISH] = act_establish; | |
2165 | work_handlers[CPL_ACT_OPEN_RPL] = act_open_rpl; | |
2166 | work_handlers[CPL_RX_DATA] = rx_data; | |
2167 | work_handlers[CPL_TX_DMA_ACK] = tx_ack; | |
2168 | work_handlers[CPL_ABORT_RPL_RSS] = abort_rpl; | |
2169 | work_handlers[CPL_ABORT_RPL] = abort_rpl; | |
2170 | work_handlers[CPL_PASS_OPEN_RPL] = pass_open_rpl; | |
2171 | work_handlers[CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl; | |
2172 | work_handlers[CPL_PASS_ACCEPT_REQ] = pass_accept_req; | |
2173 | work_handlers[CPL_PASS_ESTABLISH] = pass_establish; | |
2174 | work_handlers[CPL_PEER_CLOSE] = peer_close; | |
2175 | work_handlers[CPL_ABORT_REQ_RSS] = peer_abort; | |
2176 | work_handlers[CPL_CLOSE_CON_RPL] = close_con_rpl; | |
2177 | work_handlers[CPL_RDMA_TERMINATE] = terminate; | |
2178 | work_handlers[CPL_RDMA_EC_STATUS] = ec_status; | |
2179 | return 0; | |
2180 | } | |
2181 | ||
2182 | void __exit iwch_cm_term(void) | |
2183 | { | |
2184 | flush_workqueue(workq); | |
2185 | destroy_workqueue(workq); | |
2186 | } |