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b038ced7 SW |
1 | /* |
2 | * Copyright (c) 2006 Chelsio, Inc. All rights reserved. | |
b038ced7 SW |
3 | * |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | #include <linux/module.h> | |
33 | #include <linux/list.h> | |
34 | #include <linux/workqueue.h> | |
35 | #include <linux/skbuff.h> | |
36 | #include <linux/timer.h> | |
37 | #include <linux/notifier.h> | |
38 | ||
39 | #include <net/neighbour.h> | |
40 | #include <net/netevent.h> | |
41 | #include <net/route.h> | |
42 | ||
43 | #include "tcb.h" | |
44 | #include "cxgb3_offload.h" | |
45 | #include "iwch.h" | |
46 | #include "iwch_provider.h" | |
47 | #include "iwch_cm.h" | |
48 | ||
49 | static char *states[] = { | |
50 | "idle", | |
51 | "listen", | |
52 | "connecting", | |
53 | "mpa_wait_req", | |
54 | "mpa_req_sent", | |
55 | "mpa_req_rcvd", | |
56 | "mpa_rep_sent", | |
57 | "fpdu_mode", | |
58 | "aborting", | |
59 | "closing", | |
60 | "moribund", | |
61 | "dead", | |
62 | NULL, | |
63 | }; | |
64 | ||
65 | static int ep_timeout_secs = 10; | |
66 | module_param(ep_timeout_secs, int, 0444); | |
67 | MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout " | |
68 | "in seconds (default=10)"); | |
69 | ||
70 | static int mpa_rev = 1; | |
71 | module_param(mpa_rev, int, 0444); | |
72 | MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, " | |
73 | "1 is spec compliant. (default=1)"); | |
74 | ||
75 | static int markers_enabled = 0; | |
76 | module_param(markers_enabled, int, 0444); | |
77 | MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)"); | |
78 | ||
79 | static int crc_enabled = 1; | |
80 | module_param(crc_enabled, int, 0444); | |
81 | MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)"); | |
82 | ||
83 | static int rcv_win = 256 * 1024; | |
84 | module_param(rcv_win, int, 0444); | |
85 | MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256)"); | |
86 | ||
87 | static int snd_win = 32 * 1024; | |
88 | module_param(snd_win, int, 0444); | |
89 | MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)"); | |
90 | ||
91 | static unsigned int nocong = 0; | |
92 | module_param(nocong, uint, 0444); | |
93 | MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)"); | |
94 | ||
95 | static unsigned int cong_flavor = 1; | |
96 | module_param(cong_flavor, uint, 0444); | |
97 | MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)"); | |
98 | ||
99 | static void process_work(struct work_struct *work); | |
100 | static struct workqueue_struct *workq; | |
101 | static DECLARE_WORK(skb_work, process_work); | |
102 | ||
103 | static struct sk_buff_head rxq; | |
104 | static cxgb3_cpl_handler_func work_handlers[NUM_CPL_CMDS]; | |
105 | ||
106 | static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp); | |
107 | static void ep_timeout(unsigned long arg); | |
108 | static void connect_reply_upcall(struct iwch_ep *ep, int status); | |
109 | ||
110 | static void start_ep_timer(struct iwch_ep *ep) | |
111 | { | |
112 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
113 | if (timer_pending(&ep->timer)) { | |
114 | PDBG("%s stopped / restarted timer ep %p\n", __FUNCTION__, ep); | |
115 | del_timer_sync(&ep->timer); | |
116 | } else | |
117 | get_ep(&ep->com); | |
118 | ep->timer.expires = jiffies + ep_timeout_secs * HZ; | |
119 | ep->timer.data = (unsigned long)ep; | |
120 | ep->timer.function = ep_timeout; | |
121 | add_timer(&ep->timer); | |
122 | } | |
123 | ||
124 | static void stop_ep_timer(struct iwch_ep *ep) | |
125 | { | |
126 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
127 | del_timer_sync(&ep->timer); | |
128 | put_ep(&ep->com); | |
129 | } | |
130 | ||
131 | static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb) | |
132 | { | |
133 | struct cpl_tid_release *req; | |
134 | ||
135 | skb = get_skb(skb, sizeof *req, GFP_KERNEL); | |
136 | if (!skb) | |
137 | return; | |
138 | req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req)); | |
139 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
140 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid)); | |
141 | skb->priority = CPL_PRIORITY_SETUP; | |
142 | tdev->send(tdev, skb); | |
143 | return; | |
144 | } | |
145 | ||
146 | int iwch_quiesce_tid(struct iwch_ep *ep) | |
147 | { | |
148 | struct cpl_set_tcb_field *req; | |
149 | struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
150 | ||
151 | if (!skb) | |
152 | return -ENOMEM; | |
153 | req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); | |
154 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
155 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
156 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); | |
157 | req->reply = 0; | |
158 | req->cpu_idx = 0; | |
159 | req->word = htons(W_TCB_RX_QUIESCE); | |
160 | req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); | |
161 | req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE); | |
162 | ||
163 | skb->priority = CPL_PRIORITY_DATA; | |
164 | ep->com.tdev->send(ep->com.tdev, skb); | |
165 | return 0; | |
166 | } | |
167 | ||
168 | int iwch_resume_tid(struct iwch_ep *ep) | |
169 | { | |
170 | struct cpl_set_tcb_field *req; | |
171 | struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
172 | ||
173 | if (!skb) | |
174 | return -ENOMEM; | |
175 | req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); | |
176 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
177 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
178 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); | |
179 | req->reply = 0; | |
180 | req->cpu_idx = 0; | |
181 | req->word = htons(W_TCB_RX_QUIESCE); | |
182 | req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); | |
183 | req->val = 0; | |
184 | ||
185 | skb->priority = CPL_PRIORITY_DATA; | |
186 | ep->com.tdev->send(ep->com.tdev, skb); | |
187 | return 0; | |
188 | } | |
189 | ||
190 | static void set_emss(struct iwch_ep *ep, u16 opt) | |
191 | { | |
192 | PDBG("%s ep %p opt %u\n", __FUNCTION__, ep, opt); | |
193 | ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40; | |
194 | if (G_TCPOPT_TSTAMP(opt)) | |
195 | ep->emss -= 12; | |
196 | if (ep->emss < 128) | |
197 | ep->emss = 128; | |
198 | PDBG("emss=%d\n", ep->emss); | |
199 | } | |
200 | ||
201 | static enum iwch_ep_state state_read(struct iwch_ep_common *epc) | |
202 | { | |
203 | unsigned long flags; | |
204 | enum iwch_ep_state state; | |
205 | ||
206 | spin_lock_irqsave(&epc->lock, flags); | |
207 | state = epc->state; | |
208 | spin_unlock_irqrestore(&epc->lock, flags); | |
209 | return state; | |
210 | } | |
211 | ||
2b540355 | 212 | static void __state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) |
b038ced7 SW |
213 | { |
214 | epc->state = new; | |
215 | } | |
216 | ||
217 | static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) | |
218 | { | |
219 | unsigned long flags; | |
220 | ||
221 | spin_lock_irqsave(&epc->lock, flags); | |
222 | PDBG("%s - %s -> %s\n", __FUNCTION__, states[epc->state], states[new]); | |
223 | __state_set(epc, new); | |
224 | spin_unlock_irqrestore(&epc->lock, flags); | |
225 | return; | |
226 | } | |
227 | ||
228 | static void *alloc_ep(int size, gfp_t gfp) | |
229 | { | |
230 | struct iwch_ep_common *epc; | |
231 | ||
232 | epc = kmalloc(size, gfp); | |
233 | if (epc) { | |
234 | memset(epc, 0, size); | |
235 | kref_init(&epc->kref); | |
236 | spin_lock_init(&epc->lock); | |
237 | init_waitqueue_head(&epc->waitq); | |
238 | } | |
239 | PDBG("%s alloc ep %p\n", __FUNCTION__, epc); | |
240 | return epc; | |
241 | } | |
242 | ||
243 | void __free_ep(struct kref *kref) | |
244 | { | |
245 | struct iwch_ep_common *epc; | |
246 | epc = container_of(kref, struct iwch_ep_common, kref); | |
247 | PDBG("%s ep %p state %s\n", __FUNCTION__, epc, states[state_read(epc)]); | |
248 | kfree(epc); | |
249 | } | |
250 | ||
251 | static void release_ep_resources(struct iwch_ep *ep) | |
252 | { | |
253 | PDBG("%s ep %p tid %d\n", __FUNCTION__, ep, ep->hwtid); | |
254 | cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid); | |
255 | dst_release(ep->dst); | |
256 | l2t_release(L2DATA(ep->com.tdev), ep->l2t); | |
257 | if (ep->com.tdev->type == T3B) | |
258 | release_tid(ep->com.tdev, ep->hwtid, NULL); | |
259 | put_ep(&ep->com); | |
260 | } | |
261 | ||
262 | static void process_work(struct work_struct *work) | |
263 | { | |
264 | struct sk_buff *skb = NULL; | |
265 | void *ep; | |
266 | struct t3cdev *tdev; | |
267 | int ret; | |
268 | ||
269 | while ((skb = skb_dequeue(&rxq))) { | |
270 | ep = *((void **) (skb->cb)); | |
271 | tdev = *((struct t3cdev **) (skb->cb + sizeof(void *))); | |
272 | ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep); | |
273 | if (ret & CPL_RET_BUF_DONE) | |
274 | kfree_skb(skb); | |
275 | ||
276 | /* | |
277 | * ep was referenced in sched(), and is freed here. | |
278 | */ | |
279 | put_ep((struct iwch_ep_common *)ep); | |
280 | } | |
281 | } | |
282 | ||
283 | static int status2errno(int status) | |
284 | { | |
285 | switch (status) { | |
286 | case CPL_ERR_NONE: | |
287 | return 0; | |
288 | case CPL_ERR_CONN_RESET: | |
289 | return -ECONNRESET; | |
290 | case CPL_ERR_ARP_MISS: | |
291 | return -EHOSTUNREACH; | |
292 | case CPL_ERR_CONN_TIMEDOUT: | |
293 | return -ETIMEDOUT; | |
294 | case CPL_ERR_TCAM_FULL: | |
295 | return -ENOMEM; | |
296 | case CPL_ERR_CONN_EXIST: | |
297 | return -EADDRINUSE; | |
298 | default: | |
299 | return -EIO; | |
300 | } | |
301 | } | |
302 | ||
303 | /* | |
304 | * Try and reuse skbs already allocated... | |
305 | */ | |
306 | static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp) | |
307 | { | |
1f6a849b | 308 | if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) { |
b038ced7 SW |
309 | skb_trim(skb, 0); |
310 | skb_get(skb); | |
311 | } else { | |
312 | skb = alloc_skb(len, gfp); | |
313 | } | |
314 | return skb; | |
315 | } | |
316 | ||
317 | static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip, | |
318 | __be32 peer_ip, __be16 local_port, | |
319 | __be16 peer_port, u8 tos) | |
320 | { | |
321 | struct rtable *rt; | |
322 | struct flowi fl = { | |
323 | .oif = 0, | |
324 | .nl_u = { | |
325 | .ip4_u = { | |
326 | .daddr = peer_ip, | |
327 | .saddr = local_ip, | |
328 | .tos = tos} | |
329 | }, | |
330 | .proto = IPPROTO_TCP, | |
331 | .uli_u = { | |
332 | .ports = { | |
333 | .sport = local_port, | |
334 | .dport = peer_port} | |
335 | } | |
336 | }; | |
337 | ||
338 | if (ip_route_output_flow(&rt, &fl, NULL, 0)) | |
339 | return NULL; | |
340 | return rt; | |
341 | } | |
342 | ||
343 | static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu) | |
344 | { | |
345 | int i = 0; | |
346 | ||
347 | while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu) | |
348 | ++i; | |
349 | return i; | |
350 | } | |
351 | ||
352 | static void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb) | |
353 | { | |
354 | PDBG("%s t3cdev %p\n", __FUNCTION__, dev); | |
355 | kfree_skb(skb); | |
356 | } | |
357 | ||
358 | /* | |
359 | * Handle an ARP failure for an active open. | |
360 | */ | |
361 | static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb) | |
362 | { | |
363 | printk(KERN_ERR MOD "ARP failure duing connect\n"); | |
364 | kfree_skb(skb); | |
365 | } | |
366 | ||
367 | /* | |
368 | * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant | |
369 | * and send it along. | |
370 | */ | |
371 | static void abort_arp_failure(struct t3cdev *dev, struct sk_buff *skb) | |
372 | { | |
373 | struct cpl_abort_req *req = cplhdr(skb); | |
374 | ||
375 | PDBG("%s t3cdev %p\n", __FUNCTION__, dev); | |
376 | req->cmd = CPL_ABORT_NO_RST; | |
377 | cxgb3_ofld_send(dev, skb); | |
378 | } | |
379 | ||
380 | static int send_halfclose(struct iwch_ep *ep, gfp_t gfp) | |
381 | { | |
382 | struct cpl_close_con_req *req; | |
383 | struct sk_buff *skb; | |
384 | ||
385 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
386 | skb = get_skb(NULL, sizeof(*req), gfp); | |
387 | if (!skb) { | |
388 | printk(KERN_ERR MOD "%s - failed to alloc skb\n", __FUNCTION__); | |
389 | return -ENOMEM; | |
390 | } | |
391 | skb->priority = CPL_PRIORITY_DATA; | |
392 | set_arp_failure_handler(skb, arp_failure_discard); | |
393 | req = (struct cpl_close_con_req *) skb_put(skb, sizeof(*req)); | |
394 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); | |
395 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
396 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid)); | |
397 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
398 | return 0; | |
399 | } | |
400 | ||
401 | static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) | |
402 | { | |
403 | struct cpl_abort_req *req; | |
404 | ||
405 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
406 | skb = get_skb(skb, sizeof(*req), gfp); | |
407 | if (!skb) { | |
408 | printk(KERN_ERR MOD "%s - failed to alloc skb.\n", | |
409 | __FUNCTION__); | |
410 | return -ENOMEM; | |
411 | } | |
412 | skb->priority = CPL_PRIORITY_DATA; | |
413 | set_arp_failure_handler(skb, abort_arp_failure); | |
414 | req = (struct cpl_abort_req *) skb_put(skb, sizeof(*req)); | |
415 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); | |
416 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
417 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid)); | |
418 | req->cmd = CPL_ABORT_SEND_RST; | |
419 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
420 | return 0; | |
421 | } | |
422 | ||
423 | static int send_connect(struct iwch_ep *ep) | |
424 | { | |
425 | struct cpl_act_open_req *req; | |
426 | struct sk_buff *skb; | |
427 | u32 opt0h, opt0l, opt2; | |
428 | unsigned int mtu_idx; | |
429 | int wscale; | |
430 | ||
431 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
432 | ||
433 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
434 | if (!skb) { | |
435 | printk(KERN_ERR MOD "%s - failed to alloc skb.\n", | |
436 | __FUNCTION__); | |
437 | return -ENOMEM; | |
438 | } | |
439 | mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); | |
440 | wscale = compute_wscale(rcv_win); | |
441 | opt0h = V_NAGLE(0) | | |
442 | V_NO_CONG(nocong) | | |
443 | V_KEEP_ALIVE(1) | | |
444 | F_TCAM_BYPASS | | |
445 | V_WND_SCALE(wscale) | | |
446 | V_MSS_IDX(mtu_idx) | | |
447 | V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); | |
448 | opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); | |
449 | opt2 = V_FLAVORS_VALID(1) | V_CONG_CONTROL_FLAVOR(cong_flavor); | |
450 | skb->priority = CPL_PRIORITY_SETUP; | |
451 | set_arp_failure_handler(skb, act_open_req_arp_failure); | |
452 | ||
453 | req = (struct cpl_act_open_req *) skb_put(skb, sizeof(*req)); | |
454 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
455 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ep->atid)); | |
456 | req->local_port = ep->com.local_addr.sin_port; | |
457 | req->peer_port = ep->com.remote_addr.sin_port; | |
458 | req->local_ip = ep->com.local_addr.sin_addr.s_addr; | |
459 | req->peer_ip = ep->com.remote_addr.sin_addr.s_addr; | |
460 | req->opt0h = htonl(opt0h); | |
461 | req->opt0l = htonl(opt0l); | |
462 | req->params = 0; | |
463 | req->opt2 = htonl(opt2); | |
464 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
465 | return 0; | |
466 | } | |
467 | ||
468 | static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb) | |
469 | { | |
470 | int mpalen; | |
471 | struct tx_data_wr *req; | |
472 | struct mpa_message *mpa; | |
473 | int len; | |
474 | ||
475 | PDBG("%s ep %p pd_len %d\n", __FUNCTION__, ep, ep->plen); | |
476 | ||
477 | BUG_ON(skb_cloned(skb)); | |
478 | ||
479 | mpalen = sizeof(*mpa) + ep->plen; | |
4305b541 | 480 | if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) { |
b038ced7 SW |
481 | kfree_skb(skb); |
482 | skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL); | |
483 | if (!skb) { | |
484 | connect_reply_upcall(ep, -ENOMEM); | |
485 | return; | |
486 | } | |
487 | } | |
488 | skb_trim(skb, 0); | |
489 | skb_reserve(skb, sizeof(*req)); | |
490 | skb_put(skb, mpalen); | |
491 | skb->priority = CPL_PRIORITY_DATA; | |
492 | mpa = (struct mpa_message *) skb->data; | |
493 | memset(mpa, 0, sizeof(*mpa)); | |
494 | memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)); | |
495 | mpa->flags = (crc_enabled ? MPA_CRC : 0) | | |
496 | (markers_enabled ? MPA_MARKERS : 0); | |
497 | mpa->private_data_size = htons(ep->plen); | |
498 | mpa->revision = mpa_rev; | |
499 | ||
500 | if (ep->plen) | |
501 | memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen); | |
502 | ||
503 | /* | |
504 | * Reference the mpa skb. This ensures the data area | |
505 | * will remain in memory until the hw acks the tx. | |
506 | * Function tx_ack() will deref it. | |
507 | */ | |
508 | skb_get(skb); | |
509 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 510 | skb_reset_transport_header(skb); |
b038ced7 SW |
511 | len = skb->len; |
512 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); | |
513 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)); | |
514 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
515 | req->len = htonl(len); | |
516 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
517 | V_TX_SNDBUF(snd_win>>15)); | |
518 | req->flags = htonl(F_TX_IMM_ACK|F_TX_INIT); | |
519 | req->sndseq = htonl(ep->snd_seq); | |
520 | BUG_ON(ep->mpa_skb); | |
521 | ep->mpa_skb = skb; | |
522 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
523 | start_ep_timer(ep); | |
524 | state_set(&ep->com, MPA_REQ_SENT); | |
525 | return; | |
526 | } | |
527 | ||
528 | static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen) | |
529 | { | |
530 | int mpalen; | |
531 | struct tx_data_wr *req; | |
532 | struct mpa_message *mpa; | |
533 | struct sk_buff *skb; | |
534 | ||
535 | PDBG("%s ep %p plen %d\n", __FUNCTION__, ep, plen); | |
536 | ||
537 | mpalen = sizeof(*mpa) + plen; | |
538 | ||
539 | skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); | |
540 | if (!skb) { | |
541 | printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __FUNCTION__); | |
542 | return -ENOMEM; | |
543 | } | |
544 | skb_reserve(skb, sizeof(*req)); | |
545 | mpa = (struct mpa_message *) skb_put(skb, mpalen); | |
546 | memset(mpa, 0, sizeof(*mpa)); | |
547 | memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); | |
548 | mpa->flags = MPA_REJECT; | |
549 | mpa->revision = mpa_rev; | |
550 | mpa->private_data_size = htons(plen); | |
551 | if (plen) | |
552 | memcpy(mpa->private_data, pdata, plen); | |
553 | ||
554 | /* | |
555 | * Reference the mpa skb again. This ensures the data area | |
556 | * will remain in memory until the hw acks the tx. | |
557 | * Function tx_ack() will deref it. | |
558 | */ | |
559 | skb_get(skb); | |
560 | skb->priority = CPL_PRIORITY_DATA; | |
561 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 562 | skb_reset_transport_header(skb); |
b038ced7 SW |
563 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); |
564 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)); | |
565 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
566 | req->len = htonl(mpalen); | |
567 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
568 | V_TX_SNDBUF(snd_win>>15)); | |
569 | req->flags = htonl(F_TX_IMM_ACK|F_TX_INIT); | |
570 | req->sndseq = htonl(ep->snd_seq); | |
571 | BUG_ON(ep->mpa_skb); | |
572 | ep->mpa_skb = skb; | |
573 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
574 | return 0; | |
575 | } | |
576 | ||
577 | static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen) | |
578 | { | |
579 | int mpalen; | |
580 | struct tx_data_wr *req; | |
581 | struct mpa_message *mpa; | |
582 | int len; | |
583 | struct sk_buff *skb; | |
584 | ||
585 | PDBG("%s ep %p plen %d\n", __FUNCTION__, ep, plen); | |
586 | ||
587 | mpalen = sizeof(*mpa) + plen; | |
588 | ||
589 | skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); | |
590 | if (!skb) { | |
591 | printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __FUNCTION__); | |
592 | return -ENOMEM; | |
593 | } | |
594 | skb->priority = CPL_PRIORITY_DATA; | |
595 | skb_reserve(skb, sizeof(*req)); | |
596 | mpa = (struct mpa_message *) skb_put(skb, mpalen); | |
597 | memset(mpa, 0, sizeof(*mpa)); | |
598 | memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); | |
599 | mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) | | |
600 | (markers_enabled ? MPA_MARKERS : 0); | |
601 | mpa->revision = mpa_rev; | |
602 | mpa->private_data_size = htons(plen); | |
603 | if (plen) | |
604 | memcpy(mpa->private_data, pdata, plen); | |
605 | ||
606 | /* | |
607 | * Reference the mpa skb. This ensures the data area | |
608 | * will remain in memory until the hw acks the tx. | |
609 | * Function tx_ack() will deref it. | |
610 | */ | |
611 | skb_get(skb); | |
612 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 613 | skb_reset_transport_header(skb); |
b038ced7 SW |
614 | len = skb->len; |
615 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); | |
616 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)); | |
617 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
618 | req->len = htonl(len); | |
619 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
620 | V_TX_SNDBUF(snd_win>>15)); | |
621 | req->flags = htonl(F_TX_MORE | F_TX_IMM_ACK | F_TX_INIT); | |
622 | req->sndseq = htonl(ep->snd_seq); | |
623 | ep->mpa_skb = skb; | |
624 | state_set(&ep->com, MPA_REP_SENT); | |
625 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
626 | return 0; | |
627 | } | |
628 | ||
629 | static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
630 | { | |
631 | struct iwch_ep *ep = ctx; | |
632 | struct cpl_act_establish *req = cplhdr(skb); | |
633 | unsigned int tid = GET_TID(req); | |
634 | ||
635 | PDBG("%s ep %p tid %d\n", __FUNCTION__, ep, tid); | |
636 | ||
637 | dst_confirm(ep->dst); | |
638 | ||
639 | /* setup the hwtid for this connection */ | |
640 | ep->hwtid = tid; | |
641 | cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid); | |
642 | ||
643 | ep->snd_seq = ntohl(req->snd_isn); | |
644 | ||
645 | set_emss(ep, ntohs(req->tcp_opt)); | |
646 | ||
647 | /* dealloc the atid */ | |
648 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
649 | ||
650 | /* start MPA negotiation */ | |
651 | send_mpa_req(ep, skb); | |
652 | ||
653 | return 0; | |
654 | } | |
655 | ||
656 | static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) | |
657 | { | |
658 | PDBG("%s ep %p\n", __FILE__, ep); | |
659 | state_set(&ep->com, ABORTING); | |
660 | send_abort(ep, skb, gfp); | |
661 | } | |
662 | ||
663 | static void close_complete_upcall(struct iwch_ep *ep) | |
664 | { | |
665 | struct iw_cm_event event; | |
666 | ||
667 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
668 | memset(&event, 0, sizeof(event)); | |
669 | event.event = IW_CM_EVENT_CLOSE; | |
670 | if (ep->com.cm_id) { | |
671 | PDBG("close complete delivered ep %p cm_id %p tid %d\n", | |
672 | ep, ep->com.cm_id, ep->hwtid); | |
673 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
674 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
675 | ep->com.cm_id = NULL; | |
676 | ep->com.qp = NULL; | |
677 | } | |
678 | } | |
679 | ||
680 | static void peer_close_upcall(struct iwch_ep *ep) | |
681 | { | |
682 | struct iw_cm_event event; | |
683 | ||
684 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
685 | memset(&event, 0, sizeof(event)); | |
686 | event.event = IW_CM_EVENT_DISCONNECT; | |
687 | if (ep->com.cm_id) { | |
688 | PDBG("peer close delivered ep %p cm_id %p tid %d\n", | |
689 | ep, ep->com.cm_id, ep->hwtid); | |
690 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
691 | } | |
692 | } | |
693 | ||
694 | static void peer_abort_upcall(struct iwch_ep *ep) | |
695 | { | |
696 | struct iw_cm_event event; | |
697 | ||
698 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
699 | memset(&event, 0, sizeof(event)); | |
700 | event.event = IW_CM_EVENT_CLOSE; | |
701 | event.status = -ECONNRESET; | |
702 | if (ep->com.cm_id) { | |
703 | PDBG("abort delivered ep %p cm_id %p tid %d\n", ep, | |
704 | ep->com.cm_id, ep->hwtid); | |
705 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
706 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
707 | ep->com.cm_id = NULL; | |
708 | ep->com.qp = NULL; | |
709 | } | |
710 | } | |
711 | ||
712 | static void connect_reply_upcall(struct iwch_ep *ep, int status) | |
713 | { | |
714 | struct iw_cm_event event; | |
715 | ||
716 | PDBG("%s ep %p status %d\n", __FUNCTION__, ep, status); | |
717 | memset(&event, 0, sizeof(event)); | |
718 | event.event = IW_CM_EVENT_CONNECT_REPLY; | |
719 | event.status = status; | |
720 | event.local_addr = ep->com.local_addr; | |
721 | event.remote_addr = ep->com.remote_addr; | |
722 | ||
723 | if ((status == 0) || (status == -ECONNREFUSED)) { | |
724 | event.private_data_len = ep->plen; | |
725 | event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); | |
726 | } | |
727 | if (ep->com.cm_id) { | |
728 | PDBG("%s ep %p tid %d status %d\n", __FUNCTION__, ep, | |
729 | ep->hwtid, status); | |
730 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
731 | } | |
732 | if (status < 0) { | |
733 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
734 | ep->com.cm_id = NULL; | |
735 | ep->com.qp = NULL; | |
736 | } | |
737 | } | |
738 | ||
739 | static void connect_request_upcall(struct iwch_ep *ep) | |
740 | { | |
741 | struct iw_cm_event event; | |
742 | ||
743 | PDBG("%s ep %p tid %d\n", __FUNCTION__, ep, ep->hwtid); | |
744 | memset(&event, 0, sizeof(event)); | |
745 | event.event = IW_CM_EVENT_CONNECT_REQUEST; | |
746 | event.local_addr = ep->com.local_addr; | |
747 | event.remote_addr = ep->com.remote_addr; | |
748 | event.private_data_len = ep->plen; | |
749 | event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); | |
750 | event.provider_data = ep; | |
751 | if (state_read(&ep->parent_ep->com) != DEAD) | |
752 | ep->parent_ep->com.cm_id->event_handler( | |
753 | ep->parent_ep->com.cm_id, | |
754 | &event); | |
755 | put_ep(&ep->parent_ep->com); | |
756 | ep->parent_ep = NULL; | |
757 | } | |
758 | ||
759 | static void established_upcall(struct iwch_ep *ep) | |
760 | { | |
761 | struct iw_cm_event event; | |
762 | ||
763 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
764 | memset(&event, 0, sizeof(event)); | |
765 | event.event = IW_CM_EVENT_ESTABLISHED; | |
766 | if (ep->com.cm_id) { | |
767 | PDBG("%s ep %p tid %d\n", __FUNCTION__, ep, ep->hwtid); | |
768 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
769 | } | |
770 | } | |
771 | ||
772 | static int update_rx_credits(struct iwch_ep *ep, u32 credits) | |
773 | { | |
774 | struct cpl_rx_data_ack *req; | |
775 | struct sk_buff *skb; | |
776 | ||
777 | PDBG("%s ep %p credits %u\n", __FUNCTION__, ep, credits); | |
778 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
779 | if (!skb) { | |
780 | printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n"); | |
781 | return 0; | |
782 | } | |
783 | ||
784 | req = (struct cpl_rx_data_ack *) skb_put(skb, sizeof(*req)); | |
785 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
786 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid)); | |
787 | req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1)); | |
788 | skb->priority = CPL_PRIORITY_ACK; | |
789 | ep->com.tdev->send(ep->com.tdev, skb); | |
790 | return credits; | |
791 | } | |
792 | ||
793 | static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb) | |
794 | { | |
795 | struct mpa_message *mpa; | |
796 | u16 plen; | |
797 | struct iwch_qp_attributes attrs; | |
798 | enum iwch_qp_attr_mask mask; | |
799 | int err; | |
800 | ||
801 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
802 | ||
803 | /* | |
804 | * Stop mpa timer. If it expired, then the state has | |
805 | * changed and we bail since ep_timeout already aborted | |
806 | * the connection. | |
807 | */ | |
808 | stop_ep_timer(ep); | |
809 | if (state_read(&ep->com) != MPA_REQ_SENT) | |
810 | return; | |
811 | ||
812 | /* | |
813 | * If we get more than the supported amount of private data | |
814 | * then we must fail this connection. | |
815 | */ | |
816 | if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { | |
817 | err = -EINVAL; | |
818 | goto err; | |
819 | } | |
820 | ||
821 | /* | |
822 | * copy the new data into our accumulation buffer. | |
823 | */ | |
824 | memcpy(&(ep->mpa_pkt[ep->mpa_pkt_len]), skb->data, skb->len); | |
825 | ep->mpa_pkt_len += skb->len; | |
826 | ||
827 | /* | |
828 | * if we don't even have the mpa message, then bail. | |
829 | */ | |
830 | if (ep->mpa_pkt_len < sizeof(*mpa)) | |
831 | return; | |
832 | mpa = (struct mpa_message *) ep->mpa_pkt; | |
833 | ||
834 | /* Validate MPA header. */ | |
835 | if (mpa->revision != mpa_rev) { | |
836 | err = -EPROTO; | |
837 | goto err; | |
838 | } | |
839 | if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) { | |
840 | err = -EPROTO; | |
841 | goto err; | |
842 | } | |
843 | ||
844 | plen = ntohs(mpa->private_data_size); | |
845 | ||
846 | /* | |
847 | * Fail if there's too much private data. | |
848 | */ | |
849 | if (plen > MPA_MAX_PRIVATE_DATA) { | |
850 | err = -EPROTO; | |
851 | goto err; | |
852 | } | |
853 | ||
854 | /* | |
855 | * If plen does not account for pkt size | |
856 | */ | |
857 | if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { | |
858 | err = -EPROTO; | |
859 | goto err; | |
860 | } | |
861 | ||
862 | ep->plen = (u8) plen; | |
863 | ||
864 | /* | |
865 | * If we don't have all the pdata yet, then bail. | |
866 | * We'll continue process when more data arrives. | |
867 | */ | |
868 | if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) | |
869 | return; | |
870 | ||
871 | if (mpa->flags & MPA_REJECT) { | |
872 | err = -ECONNREFUSED; | |
873 | goto err; | |
874 | } | |
875 | ||
876 | /* | |
877 | * If we get here we have accumulated the entire mpa | |
878 | * start reply message including private data. And | |
879 | * the MPA header is valid. | |
880 | */ | |
881 | state_set(&ep->com, FPDU_MODE); | |
882 | ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; | |
883 | ep->mpa_attr.recv_marker_enabled = markers_enabled; | |
884 | ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; | |
885 | ep->mpa_attr.version = mpa_rev; | |
886 | PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " | |
887 | "xmit_marker_enabled=%d, version=%d\n", __FUNCTION__, | |
888 | ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, | |
889 | ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); | |
890 | ||
891 | attrs.mpa_attr = ep->mpa_attr; | |
892 | attrs.max_ird = ep->ird; | |
893 | attrs.max_ord = ep->ord; | |
894 | attrs.llp_stream_handle = ep; | |
895 | attrs.next_state = IWCH_QP_STATE_RTS; | |
896 | ||
897 | mask = IWCH_QP_ATTR_NEXT_STATE | | |
898 | IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR | | |
899 | IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD; | |
900 | ||
901 | /* bind QP and TID with INIT_WR */ | |
902 | err = iwch_modify_qp(ep->com.qp->rhp, | |
903 | ep->com.qp, mask, &attrs, 1); | |
904 | if (!err) | |
905 | goto out; | |
906 | err: | |
907 | abort_connection(ep, skb, GFP_KERNEL); | |
908 | out: | |
909 | connect_reply_upcall(ep, err); | |
910 | return; | |
911 | } | |
912 | ||
913 | static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb) | |
914 | { | |
915 | struct mpa_message *mpa; | |
916 | u16 plen; | |
917 | ||
918 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
919 | ||
920 | /* | |
921 | * Stop mpa timer. If it expired, then the state has | |
922 | * changed and we bail since ep_timeout already aborted | |
923 | * the connection. | |
924 | */ | |
925 | stop_ep_timer(ep); | |
926 | if (state_read(&ep->com) != MPA_REQ_WAIT) | |
927 | return; | |
928 | ||
929 | /* | |
930 | * If we get more than the supported amount of private data | |
931 | * then we must fail this connection. | |
932 | */ | |
933 | if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { | |
934 | abort_connection(ep, skb, GFP_KERNEL); | |
935 | return; | |
936 | } | |
937 | ||
938 | PDBG("%s enter (%s line %u)\n", __FUNCTION__, __FILE__, __LINE__); | |
939 | ||
940 | /* | |
941 | * Copy the new data into our accumulation buffer. | |
942 | */ | |
943 | memcpy(&(ep->mpa_pkt[ep->mpa_pkt_len]), skb->data, skb->len); | |
944 | ep->mpa_pkt_len += skb->len; | |
945 | ||
946 | /* | |
947 | * If we don't even have the mpa message, then bail. | |
948 | * We'll continue process when more data arrives. | |
949 | */ | |
950 | if (ep->mpa_pkt_len < sizeof(*mpa)) | |
951 | return; | |
952 | PDBG("%s enter (%s line %u)\n", __FUNCTION__, __FILE__, __LINE__); | |
953 | mpa = (struct mpa_message *) ep->mpa_pkt; | |
954 | ||
955 | /* | |
956 | * Validate MPA Header. | |
957 | */ | |
958 | if (mpa->revision != mpa_rev) { | |
959 | abort_connection(ep, skb, GFP_KERNEL); | |
960 | return; | |
961 | } | |
962 | ||
963 | if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) { | |
964 | abort_connection(ep, skb, GFP_KERNEL); | |
965 | return; | |
966 | } | |
967 | ||
968 | plen = ntohs(mpa->private_data_size); | |
969 | ||
970 | /* | |
971 | * Fail if there's too much private data. | |
972 | */ | |
973 | if (plen > MPA_MAX_PRIVATE_DATA) { | |
974 | abort_connection(ep, skb, GFP_KERNEL); | |
975 | return; | |
976 | } | |
977 | ||
978 | /* | |
979 | * If plen does not account for pkt size | |
980 | */ | |
981 | if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { | |
982 | abort_connection(ep, skb, GFP_KERNEL); | |
983 | return; | |
984 | } | |
985 | ep->plen = (u8) plen; | |
986 | ||
987 | /* | |
988 | * If we don't have all the pdata yet, then bail. | |
989 | */ | |
990 | if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) | |
991 | return; | |
992 | ||
993 | /* | |
994 | * If we get here we have accumulated the entire mpa | |
995 | * start reply message including private data. | |
996 | */ | |
997 | ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; | |
998 | ep->mpa_attr.recv_marker_enabled = markers_enabled; | |
999 | ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; | |
1000 | ep->mpa_attr.version = mpa_rev; | |
1001 | PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " | |
1002 | "xmit_marker_enabled=%d, version=%d\n", __FUNCTION__, | |
1003 | ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, | |
1004 | ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); | |
1005 | ||
1006 | state_set(&ep->com, MPA_REQ_RCVD); | |
1007 | ||
1008 | /* drive upcall */ | |
1009 | connect_request_upcall(ep); | |
1010 | return; | |
1011 | } | |
1012 | ||
1013 | static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1014 | { | |
1015 | struct iwch_ep *ep = ctx; | |
1016 | struct cpl_rx_data *hdr = cplhdr(skb); | |
1017 | unsigned int dlen = ntohs(hdr->len); | |
1018 | ||
1019 | PDBG("%s ep %p dlen %u\n", __FUNCTION__, ep, dlen); | |
1020 | ||
1021 | skb_pull(skb, sizeof(*hdr)); | |
1022 | skb_trim(skb, dlen); | |
1023 | ||
1024 | switch (state_read(&ep->com)) { | |
1025 | case MPA_REQ_SENT: | |
1026 | process_mpa_reply(ep, skb); | |
1027 | break; | |
1028 | case MPA_REQ_WAIT: | |
1029 | process_mpa_request(ep, skb); | |
1030 | break; | |
1031 | case MPA_REP_SENT: | |
1032 | break; | |
1033 | default: | |
1034 | printk(KERN_ERR MOD "%s Unexpected streaming data." | |
1035 | " ep %p state %d tid %d\n", | |
1036 | __FUNCTION__, ep, state_read(&ep->com), ep->hwtid); | |
1037 | ||
1038 | /* | |
1039 | * The ep will timeout and inform the ULP of the failure. | |
1040 | * See ep_timeout(). | |
1041 | */ | |
1042 | break; | |
1043 | } | |
1044 | ||
1045 | /* update RX credits */ | |
1046 | update_rx_credits(ep, dlen); | |
1047 | ||
1048 | return CPL_RET_BUF_DONE; | |
1049 | } | |
1050 | ||
1051 | /* | |
1052 | * Upcall from the adapter indicating data has been transmitted. | |
1053 | * For us its just the single MPA request or reply. We can now free | |
1054 | * the skb holding the mpa message. | |
1055 | */ | |
1056 | static int tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1057 | { | |
1058 | struct iwch_ep *ep = ctx; | |
1059 | struct cpl_wr_ack *hdr = cplhdr(skb); | |
1060 | unsigned int credits = ntohs(hdr->credits); | |
1061 | enum iwch_qp_attr_mask mask; | |
1062 | ||
1063 | PDBG("%s ep %p credits %u\n", __FUNCTION__, ep, credits); | |
1064 | ||
1065 | if (credits == 0) | |
1066 | return CPL_RET_BUF_DONE; | |
1067 | BUG_ON(credits != 1); | |
1068 | BUG_ON(ep->mpa_skb == NULL); | |
1069 | kfree_skb(ep->mpa_skb); | |
1070 | ep->mpa_skb = NULL; | |
1071 | dst_confirm(ep->dst); | |
1072 | if (state_read(&ep->com) == MPA_REP_SENT) { | |
1073 | struct iwch_qp_attributes attrs; | |
1074 | ||
1075 | /* bind QP to EP and move to RTS */ | |
1076 | attrs.mpa_attr = ep->mpa_attr; | |
1077 | attrs.max_ird = ep->ord; | |
1078 | attrs.max_ord = ep->ord; | |
1079 | attrs.llp_stream_handle = ep; | |
1080 | attrs.next_state = IWCH_QP_STATE_RTS; | |
1081 | ||
1082 | /* bind QP and TID with INIT_WR */ | |
1083 | mask = IWCH_QP_ATTR_NEXT_STATE | | |
1084 | IWCH_QP_ATTR_LLP_STREAM_HANDLE | | |
1085 | IWCH_QP_ATTR_MPA_ATTR | | |
1086 | IWCH_QP_ATTR_MAX_IRD | | |
1087 | IWCH_QP_ATTR_MAX_ORD; | |
1088 | ||
1089 | ep->com.rpl_err = iwch_modify_qp(ep->com.qp->rhp, | |
1090 | ep->com.qp, mask, &attrs, 1); | |
1091 | ||
1092 | if (!ep->com.rpl_err) { | |
1093 | state_set(&ep->com, FPDU_MODE); | |
1094 | established_upcall(ep); | |
1095 | } | |
1096 | ||
1097 | ep->com.rpl_done = 1; | |
1098 | PDBG("waking up ep %p\n", ep); | |
1099 | wake_up(&ep->com.waitq); | |
1100 | } | |
1101 | return CPL_RET_BUF_DONE; | |
1102 | } | |
1103 | ||
1104 | static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1105 | { | |
1106 | struct iwch_ep *ep = ctx; | |
1107 | ||
1108 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
1109 | ||
1110 | close_complete_upcall(ep); | |
1111 | state_set(&ep->com, DEAD); | |
1112 | release_ep_resources(ep); | |
1113 | return CPL_RET_BUF_DONE; | |
1114 | } | |
1115 | ||
1116 | static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1117 | { | |
1118 | struct iwch_ep *ep = ctx; | |
1119 | struct cpl_act_open_rpl *rpl = cplhdr(skb); | |
1120 | ||
1121 | PDBG("%s ep %p status %u errno %d\n", __FUNCTION__, ep, rpl->status, | |
1122 | status2errno(rpl->status)); | |
1123 | connect_reply_upcall(ep, status2errno(rpl->status)); | |
1124 | state_set(&ep->com, DEAD); | |
1125 | if (ep->com.tdev->type == T3B) | |
1126 | release_tid(ep->com.tdev, GET_TID(rpl), NULL); | |
1127 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
1128 | dst_release(ep->dst); | |
1129 | l2t_release(L2DATA(ep->com.tdev), ep->l2t); | |
1130 | put_ep(&ep->com); | |
1131 | return CPL_RET_BUF_DONE; | |
1132 | } | |
1133 | ||
1134 | static int listen_start(struct iwch_listen_ep *ep) | |
1135 | { | |
1136 | struct sk_buff *skb; | |
1137 | struct cpl_pass_open_req *req; | |
1138 | ||
1139 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
1140 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
1141 | if (!skb) { | |
1142 | printk(KERN_ERR MOD "t3c_listen_start failed to alloc skb!\n"); | |
1143 | return -ENOMEM; | |
1144 | } | |
1145 | ||
1146 | req = (struct cpl_pass_open_req *) skb_put(skb, sizeof(*req)); | |
1147 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1148 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, ep->stid)); | |
1149 | req->local_port = ep->com.local_addr.sin_port; | |
1150 | req->local_ip = ep->com.local_addr.sin_addr.s_addr; | |
1151 | req->peer_port = 0; | |
1152 | req->peer_ip = 0; | |
1153 | req->peer_netmask = 0; | |
1154 | req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS); | |
1155 | req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10)); | |
1156 | req->opt1 = htonl(V_CONN_POLICY(CPL_CONN_POLICY_ASK)); | |
1157 | ||
1158 | skb->priority = 1; | |
1159 | ep->com.tdev->send(ep->com.tdev, skb); | |
1160 | return 0; | |
1161 | } | |
1162 | ||
1163 | static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1164 | { | |
1165 | struct iwch_listen_ep *ep = ctx; | |
1166 | struct cpl_pass_open_rpl *rpl = cplhdr(skb); | |
1167 | ||
1168 | PDBG("%s ep %p status %d error %d\n", __FUNCTION__, ep, | |
1169 | rpl->status, status2errno(rpl->status)); | |
1170 | ep->com.rpl_err = status2errno(rpl->status); | |
1171 | ep->com.rpl_done = 1; | |
1172 | wake_up(&ep->com.waitq); | |
1173 | ||
1174 | return CPL_RET_BUF_DONE; | |
1175 | } | |
1176 | ||
1177 | static int listen_stop(struct iwch_listen_ep *ep) | |
1178 | { | |
1179 | struct sk_buff *skb; | |
1180 | struct cpl_close_listserv_req *req; | |
1181 | ||
1182 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
1183 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
1184 | if (!skb) { | |
1185 | printk(KERN_ERR MOD "%s - failed to alloc skb\n", __FUNCTION__); | |
1186 | return -ENOMEM; | |
1187 | } | |
1188 | req = (struct cpl_close_listserv_req *) skb_put(skb, sizeof(*req)); | |
1189 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1190 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid)); | |
1191 | skb->priority = 1; | |
1192 | ep->com.tdev->send(ep->com.tdev, skb); | |
1193 | return 0; | |
1194 | } | |
1195 | ||
1196 | static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb, | |
1197 | void *ctx) | |
1198 | { | |
1199 | struct iwch_listen_ep *ep = ctx; | |
1200 | struct cpl_close_listserv_rpl *rpl = cplhdr(skb); | |
1201 | ||
1202 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
1203 | ep->com.rpl_err = status2errno(rpl->status); | |
1204 | ep->com.rpl_done = 1; | |
1205 | wake_up(&ep->com.waitq); | |
1206 | return CPL_RET_BUF_DONE; | |
1207 | } | |
1208 | ||
1209 | static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb) | |
1210 | { | |
1211 | struct cpl_pass_accept_rpl *rpl; | |
1212 | unsigned int mtu_idx; | |
1213 | u32 opt0h, opt0l, opt2; | |
1214 | int wscale; | |
1215 | ||
1216 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
1217 | BUG_ON(skb_cloned(skb)); | |
1218 | skb_trim(skb, sizeof(*rpl)); | |
1219 | skb_get(skb); | |
1220 | mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); | |
1221 | wscale = compute_wscale(rcv_win); | |
1222 | opt0h = V_NAGLE(0) | | |
1223 | V_NO_CONG(nocong) | | |
1224 | V_KEEP_ALIVE(1) | | |
1225 | F_TCAM_BYPASS | | |
1226 | V_WND_SCALE(wscale) | | |
1227 | V_MSS_IDX(mtu_idx) | | |
1228 | V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); | |
1229 | opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); | |
1230 | opt2 = V_FLAVORS_VALID(1) | V_CONG_CONTROL_FLAVOR(cong_flavor); | |
1231 | ||
1232 | rpl = cplhdr(skb); | |
1233 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1234 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid)); | |
1235 | rpl->peer_ip = peer_ip; | |
1236 | rpl->opt0h = htonl(opt0h); | |
1237 | rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT); | |
1238 | rpl->opt2 = htonl(opt2); | |
1239 | rpl->rsvd = rpl->opt2; /* workaround for HW bug */ | |
1240 | skb->priority = CPL_PRIORITY_SETUP; | |
1241 | l2t_send(ep->com.tdev, skb, ep->l2t); | |
1242 | ||
1243 | return; | |
1244 | } | |
1245 | ||
1246 | static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip, | |
1247 | struct sk_buff *skb) | |
1248 | { | |
1249 | PDBG("%s t3cdev %p tid %u peer_ip %x\n", __FUNCTION__, tdev, hwtid, | |
1250 | peer_ip); | |
1251 | BUG_ON(skb_cloned(skb)); | |
1252 | skb_trim(skb, sizeof(struct cpl_tid_release)); | |
1253 | skb_get(skb); | |
1254 | ||
1255 | if (tdev->type == T3B) | |
1256 | release_tid(tdev, hwtid, skb); | |
1257 | else { | |
1258 | struct cpl_pass_accept_rpl *rpl; | |
1259 | ||
1260 | rpl = cplhdr(skb); | |
1261 | skb->priority = CPL_PRIORITY_SETUP; | |
1262 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1263 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, | |
1264 | hwtid)); | |
1265 | rpl->peer_ip = peer_ip; | |
1266 | rpl->opt0h = htonl(F_TCAM_BYPASS); | |
1267 | rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT); | |
1268 | rpl->opt2 = 0; | |
1269 | rpl->rsvd = rpl->opt2; | |
1270 | tdev->send(tdev, skb); | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1275 | { | |
1276 | struct iwch_ep *child_ep, *parent_ep = ctx; | |
1277 | struct cpl_pass_accept_req *req = cplhdr(skb); | |
1278 | unsigned int hwtid = GET_TID(req); | |
1279 | struct dst_entry *dst; | |
1280 | struct l2t_entry *l2t; | |
1281 | struct rtable *rt; | |
1282 | struct iff_mac tim; | |
1283 | ||
1284 | PDBG("%s parent ep %p tid %u\n", __FUNCTION__, parent_ep, hwtid); | |
1285 | ||
1286 | if (state_read(&parent_ep->com) != LISTEN) { | |
1287 | printk(KERN_ERR "%s - listening ep not in LISTEN\n", | |
1288 | __FUNCTION__); | |
1289 | goto reject; | |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * Find the netdev for this connection request. | |
1294 | */ | |
1295 | tim.mac_addr = req->dst_mac; | |
1296 | tim.vlan_tag = ntohs(req->vlan_tag); | |
1297 | if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) { | |
1298 | printk(KERN_ERR | |
1299 | "%s bad dst mac %02x %02x %02x %02x %02x %02x\n", | |
1300 | __FUNCTION__, | |
1301 | req->dst_mac[0], | |
1302 | req->dst_mac[1], | |
1303 | req->dst_mac[2], | |
1304 | req->dst_mac[3], | |
1305 | req->dst_mac[4], | |
1306 | req->dst_mac[5]); | |
1307 | goto reject; | |
1308 | } | |
1309 | ||
1310 | /* Find output route */ | |
1311 | rt = find_route(tdev, | |
1312 | req->local_ip, | |
1313 | req->peer_ip, | |
1314 | req->local_port, | |
1315 | req->peer_port, G_PASS_OPEN_TOS(ntohl(req->tos_tid))); | |
1316 | if (!rt) { | |
1317 | printk(KERN_ERR MOD "%s - failed to find dst entry!\n", | |
1318 | __FUNCTION__); | |
1319 | goto reject; | |
1320 | } | |
1321 | dst = &rt->u.dst; | |
1322 | l2t = t3_l2t_get(tdev, dst->neighbour, dst->neighbour->dev); | |
1323 | if (!l2t) { | |
1324 | printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n", | |
1325 | __FUNCTION__); | |
1326 | dst_release(dst); | |
1327 | goto reject; | |
1328 | } | |
1329 | child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL); | |
1330 | if (!child_ep) { | |
1331 | printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n", | |
1332 | __FUNCTION__); | |
1333 | l2t_release(L2DATA(tdev), l2t); | |
1334 | dst_release(dst); | |
1335 | goto reject; | |
1336 | } | |
1337 | state_set(&child_ep->com, CONNECTING); | |
1338 | child_ep->com.tdev = tdev; | |
1339 | child_ep->com.cm_id = NULL; | |
1340 | child_ep->com.local_addr.sin_family = PF_INET; | |
1341 | child_ep->com.local_addr.sin_port = req->local_port; | |
1342 | child_ep->com.local_addr.sin_addr.s_addr = req->local_ip; | |
1343 | child_ep->com.remote_addr.sin_family = PF_INET; | |
1344 | child_ep->com.remote_addr.sin_port = req->peer_port; | |
1345 | child_ep->com.remote_addr.sin_addr.s_addr = req->peer_ip; | |
1346 | get_ep(&parent_ep->com); | |
1347 | child_ep->parent_ep = parent_ep; | |
1348 | child_ep->tos = G_PASS_OPEN_TOS(ntohl(req->tos_tid)); | |
1349 | child_ep->l2t = l2t; | |
1350 | child_ep->dst = dst; | |
1351 | child_ep->hwtid = hwtid; | |
1352 | init_timer(&child_ep->timer); | |
1353 | cxgb3_insert_tid(tdev, &t3c_client, child_ep, hwtid); | |
1354 | accept_cr(child_ep, req->peer_ip, skb); | |
1355 | goto out; | |
1356 | reject: | |
1357 | reject_cr(tdev, hwtid, req->peer_ip, skb); | |
1358 | out: | |
1359 | return CPL_RET_BUF_DONE; | |
1360 | } | |
1361 | ||
1362 | static int pass_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1363 | { | |
1364 | struct iwch_ep *ep = ctx; | |
1365 | struct cpl_pass_establish *req = cplhdr(skb); | |
1366 | ||
1367 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
1368 | ep->snd_seq = ntohl(req->snd_isn); | |
1369 | ||
1370 | set_emss(ep, ntohs(req->tcp_opt)); | |
1371 | ||
1372 | dst_confirm(ep->dst); | |
1373 | state_set(&ep->com, MPA_REQ_WAIT); | |
1374 | start_ep_timer(ep); | |
1375 | ||
1376 | return CPL_RET_BUF_DONE; | |
1377 | } | |
1378 | ||
1379 | static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1380 | { | |
1381 | struct iwch_ep *ep = ctx; | |
1382 | struct iwch_qp_attributes attrs; | |
1383 | unsigned long flags; | |
1384 | int disconnect = 1; | |
1385 | int release = 0; | |
1386 | ||
1387 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
1388 | dst_confirm(ep->dst); | |
1389 | ||
1390 | spin_lock_irqsave(&ep->com.lock, flags); | |
1391 | switch (ep->com.state) { | |
1392 | case MPA_REQ_WAIT: | |
1393 | __state_set(&ep->com, CLOSING); | |
1394 | break; | |
1395 | case MPA_REQ_SENT: | |
1396 | __state_set(&ep->com, CLOSING); | |
1397 | connect_reply_upcall(ep, -ECONNRESET); | |
1398 | break; | |
1399 | case MPA_REQ_RCVD: | |
1400 | ||
1401 | /* | |
1402 | * We're gonna mark this puppy DEAD, but keep | |
1403 | * the reference on it until the ULP accepts or | |
1404 | * rejects the CR. | |
1405 | */ | |
1406 | __state_set(&ep->com, CLOSING); | |
1407 | get_ep(&ep->com); | |
1408 | break; | |
1409 | case MPA_REP_SENT: | |
1410 | __state_set(&ep->com, CLOSING); | |
1411 | ep->com.rpl_done = 1; | |
1412 | ep->com.rpl_err = -ECONNRESET; | |
1413 | PDBG("waking up ep %p\n", ep); | |
1414 | wake_up(&ep->com.waitq); | |
1415 | break; | |
1416 | case FPDU_MODE: | |
42e31753 | 1417 | start_ep_timer(ep); |
b038ced7 SW |
1418 | __state_set(&ep->com, CLOSING); |
1419 | attrs.next_state = IWCH_QP_STATE_CLOSING; | |
1420 | iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, | |
1421 | IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); | |
1422 | peer_close_upcall(ep); | |
1423 | break; | |
1424 | case ABORTING: | |
1425 | disconnect = 0; | |
1426 | break; | |
1427 | case CLOSING: | |
b038ced7 SW |
1428 | __state_set(&ep->com, MORIBUND); |
1429 | disconnect = 0; | |
1430 | break; | |
1431 | case MORIBUND: | |
1432 | stop_ep_timer(ep); | |
1433 | if (ep->com.cm_id && ep->com.qp) { | |
1434 | attrs.next_state = IWCH_QP_STATE_IDLE; | |
1435 | iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, | |
1436 | IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); | |
1437 | } | |
1438 | close_complete_upcall(ep); | |
1439 | __state_set(&ep->com, DEAD); | |
1440 | release = 1; | |
1441 | disconnect = 0; | |
1442 | break; | |
1443 | case DEAD: | |
1444 | disconnect = 0; | |
1445 | break; | |
1446 | default: | |
1447 | BUG_ON(1); | |
1448 | } | |
1449 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1450 | if (disconnect) | |
1451 | iwch_ep_disconnect(ep, 0, GFP_KERNEL); | |
1452 | if (release) | |
1453 | release_ep_resources(ep); | |
1454 | return CPL_RET_BUF_DONE; | |
1455 | } | |
1456 | ||
1457 | /* | |
1458 | * Returns whether an ABORT_REQ_RSS message is a negative advice. | |
1459 | */ | |
2b540355 | 1460 | static int is_neg_adv_abort(unsigned int status) |
b038ced7 SW |
1461 | { |
1462 | return status == CPL_ERR_RTX_NEG_ADVICE || | |
1463 | status == CPL_ERR_PERSIST_NEG_ADVICE; | |
1464 | } | |
1465 | ||
1466 | static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1467 | { | |
1468 | struct cpl_abort_req_rss *req = cplhdr(skb); | |
1469 | struct iwch_ep *ep = ctx; | |
1470 | struct cpl_abort_rpl *rpl; | |
1471 | struct sk_buff *rpl_skb; | |
1472 | struct iwch_qp_attributes attrs; | |
1473 | int ret; | |
1474 | int state; | |
1475 | ||
1476 | if (is_neg_adv_abort(req->status)) { | |
1477 | PDBG("%s neg_adv_abort ep %p tid %d\n", __FUNCTION__, ep, | |
1478 | ep->hwtid); | |
1479 | t3_l2t_send_event(ep->com.tdev, ep->l2t); | |
1480 | return CPL_RET_BUF_DONE; | |
1481 | } | |
1482 | ||
1483 | state = state_read(&ep->com); | |
1484 | PDBG("%s ep %p state %u\n", __FUNCTION__, ep, state); | |
1485 | switch (state) { | |
1486 | case CONNECTING: | |
1487 | break; | |
1488 | case MPA_REQ_WAIT: | |
adf376b3 | 1489 | stop_ep_timer(ep); |
b038ced7 SW |
1490 | break; |
1491 | case MPA_REQ_SENT: | |
adf376b3 | 1492 | stop_ep_timer(ep); |
b038ced7 SW |
1493 | connect_reply_upcall(ep, -ECONNRESET); |
1494 | break; | |
1495 | case MPA_REP_SENT: | |
1496 | ep->com.rpl_done = 1; | |
1497 | ep->com.rpl_err = -ECONNRESET; | |
1498 | PDBG("waking up ep %p\n", ep); | |
1499 | wake_up(&ep->com.waitq); | |
1500 | break; | |
1501 | case MPA_REQ_RCVD: | |
1502 | ||
1503 | /* | |
1504 | * We're gonna mark this puppy DEAD, but keep | |
1505 | * the reference on it until the ULP accepts or | |
1506 | * rejects the CR. | |
1507 | */ | |
1508 | get_ep(&ep->com); | |
1509 | break; | |
1510 | case MORIBUND: | |
42e31753 | 1511 | case CLOSING: |
b038ced7 | 1512 | stop_ep_timer(ep); |
42e31753 | 1513 | /*FALLTHROUGH*/ |
b038ced7 | 1514 | case FPDU_MODE: |
b038ced7 SW |
1515 | if (ep->com.cm_id && ep->com.qp) { |
1516 | attrs.next_state = IWCH_QP_STATE_ERROR; | |
1517 | ret = iwch_modify_qp(ep->com.qp->rhp, | |
1518 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1519 | &attrs, 1); | |
1520 | if (ret) | |
1521 | printk(KERN_ERR MOD | |
1522 | "%s - qp <- error failed!\n", | |
1523 | __FUNCTION__); | |
1524 | } | |
1525 | peer_abort_upcall(ep); | |
1526 | break; | |
1527 | case ABORTING: | |
1528 | break; | |
1529 | case DEAD: | |
1530 | PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __FUNCTION__); | |
1531 | return CPL_RET_BUF_DONE; | |
1532 | default: | |
1533 | BUG_ON(1); | |
1534 | break; | |
1535 | } | |
1536 | dst_confirm(ep->dst); | |
1537 | ||
1538 | rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL); | |
1539 | if (!rpl_skb) { | |
1540 | printk(KERN_ERR MOD "%s - cannot allocate skb!\n", | |
1541 | __FUNCTION__); | |
1542 | dst_release(ep->dst); | |
1543 | l2t_release(L2DATA(ep->com.tdev), ep->l2t); | |
1544 | put_ep(&ep->com); | |
1545 | return CPL_RET_BUF_DONE; | |
1546 | } | |
1547 | rpl_skb->priority = CPL_PRIORITY_DATA; | |
1548 | rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl)); | |
1549 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); | |
1550 | rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
1551 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid)); | |
1552 | rpl->cmd = CPL_ABORT_NO_RST; | |
1553 | ep->com.tdev->send(ep->com.tdev, rpl_skb); | |
1554 | if (state != ABORTING) { | |
1555 | state_set(&ep->com, DEAD); | |
1556 | release_ep_resources(ep); | |
1557 | } | |
1558 | return CPL_RET_BUF_DONE; | |
1559 | } | |
1560 | ||
1561 | static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1562 | { | |
1563 | struct iwch_ep *ep = ctx; | |
1564 | struct iwch_qp_attributes attrs; | |
1565 | unsigned long flags; | |
1566 | int release = 0; | |
1567 | ||
1568 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
1569 | BUG_ON(!ep); | |
1570 | ||
1571 | /* The cm_id may be null if we failed to connect */ | |
1572 | spin_lock_irqsave(&ep->com.lock, flags); | |
1573 | switch (ep->com.state) { | |
1574 | case CLOSING: | |
b038ced7 SW |
1575 | __state_set(&ep->com, MORIBUND); |
1576 | break; | |
1577 | case MORIBUND: | |
1578 | stop_ep_timer(ep); | |
1579 | if ((ep->com.cm_id) && (ep->com.qp)) { | |
1580 | attrs.next_state = IWCH_QP_STATE_IDLE; | |
1581 | iwch_modify_qp(ep->com.qp->rhp, | |
1582 | ep->com.qp, | |
1583 | IWCH_QP_ATTR_NEXT_STATE, | |
1584 | &attrs, 1); | |
1585 | } | |
1586 | close_complete_upcall(ep); | |
1587 | __state_set(&ep->com, DEAD); | |
1588 | release = 1; | |
1589 | break; | |
42e31753 SW |
1590 | case ABORTING: |
1591 | break; | |
b038ced7 SW |
1592 | case DEAD: |
1593 | default: | |
1594 | BUG_ON(1); | |
1595 | break; | |
1596 | } | |
1597 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1598 | if (release) | |
1599 | release_ep_resources(ep); | |
1600 | return CPL_RET_BUF_DONE; | |
1601 | } | |
1602 | ||
1603 | /* | |
1604 | * T3A does 3 things when a TERM is received: | |
1605 | * 1) send up a CPL_RDMA_TERMINATE message with the TERM packet | |
1606 | * 2) generate an async event on the QP with the TERMINATE opcode | |
1607 | * 3) post a TERMINATE opcde cqe into the associated CQ. | |
1608 | * | |
1609 | * For (1), we save the message in the qp for later consumer consumption. | |
1610 | * For (2), we move the QP into TERMINATE, post a QP event and disconnect. | |
1611 | * For (3), we toss the CQE in cxio_poll_cq(). | |
1612 | * | |
1613 | * terminate() handles case (1)... | |
1614 | */ | |
1615 | static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1616 | { | |
1617 | struct iwch_ep *ep = ctx; | |
1618 | ||
1619 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
1620 | skb_pull(skb, sizeof(struct cpl_rdma_terminate)); | |
1621 | PDBG("%s saving %d bytes of term msg\n", __FUNCTION__, skb->len); | |
1622 | memcpy(ep->com.qp->attr.terminate_buffer, skb->data, skb->len); | |
1623 | ep->com.qp->attr.terminate_msg_len = skb->len; | |
1624 | ep->com.qp->attr.is_terminate_local = 0; | |
1625 | return CPL_RET_BUF_DONE; | |
1626 | } | |
1627 | ||
1628 | static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1629 | { | |
1630 | struct cpl_rdma_ec_status *rep = cplhdr(skb); | |
1631 | struct iwch_ep *ep = ctx; | |
1632 | ||
1633 | PDBG("%s ep %p tid %u status %d\n", __FUNCTION__, ep, ep->hwtid, | |
1634 | rep->status); | |
1635 | if (rep->status) { | |
1636 | struct iwch_qp_attributes attrs; | |
1637 | ||
1638 | printk(KERN_ERR MOD "%s BAD CLOSE - Aborting tid %u\n", | |
1639 | __FUNCTION__, ep->hwtid); | |
2f236735 | 1640 | stop_ep_timer(ep); |
b038ced7 SW |
1641 | attrs.next_state = IWCH_QP_STATE_ERROR; |
1642 | iwch_modify_qp(ep->com.qp->rhp, | |
1643 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1644 | &attrs, 1); | |
1645 | abort_connection(ep, NULL, GFP_KERNEL); | |
1646 | } | |
1647 | return CPL_RET_BUF_DONE; | |
1648 | } | |
1649 | ||
1650 | static void ep_timeout(unsigned long arg) | |
1651 | { | |
1652 | struct iwch_ep *ep = (struct iwch_ep *)arg; | |
1653 | struct iwch_qp_attributes attrs; | |
1654 | unsigned long flags; | |
1655 | ||
1656 | spin_lock_irqsave(&ep->com.lock, flags); | |
1657 | PDBG("%s ep %p tid %u state %d\n", __FUNCTION__, ep, ep->hwtid, | |
1658 | ep->com.state); | |
1659 | switch (ep->com.state) { | |
1660 | case MPA_REQ_SENT: | |
1661 | connect_reply_upcall(ep, -ETIMEDOUT); | |
1662 | break; | |
1663 | case MPA_REQ_WAIT: | |
1664 | break; | |
42e31753 | 1665 | case CLOSING: |
b038ced7 SW |
1666 | case MORIBUND: |
1667 | if (ep->com.cm_id && ep->com.qp) { | |
1668 | attrs.next_state = IWCH_QP_STATE_ERROR; | |
1669 | iwch_modify_qp(ep->com.qp->rhp, | |
1670 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1671 | &attrs, 1); | |
1672 | } | |
1673 | break; | |
1674 | default: | |
1675 | BUG(); | |
1676 | } | |
1677 | __state_set(&ep->com, CLOSING); | |
1678 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1679 | abort_connection(ep, NULL, GFP_ATOMIC); | |
1680 | put_ep(&ep->com); | |
1681 | } | |
1682 | ||
1683 | int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) | |
1684 | { | |
1685 | int err; | |
1686 | struct iwch_ep *ep = to_ep(cm_id); | |
1687 | PDBG("%s ep %p tid %u\n", __FUNCTION__, ep, ep->hwtid); | |
1688 | ||
1689 | if (state_read(&ep->com) == DEAD) { | |
1690 | put_ep(&ep->com); | |
1691 | return -ECONNRESET; | |
1692 | } | |
1693 | BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); | |
b038ced7 SW |
1694 | if (mpa_rev == 0) |
1695 | abort_connection(ep, NULL, GFP_KERNEL); | |
1696 | else { | |
1697 | err = send_mpa_reject(ep, pdata, pdata_len); | |
7d526e6b | 1698 | err = iwch_ep_disconnect(ep, 0, GFP_KERNEL); |
b038ced7 SW |
1699 | } |
1700 | return 0; | |
1701 | } | |
1702 | ||
1703 | int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
1704 | { | |
1705 | int err; | |
1706 | struct iwch_qp_attributes attrs; | |
1707 | enum iwch_qp_attr_mask mask; | |
1708 | struct iwch_ep *ep = to_ep(cm_id); | |
1709 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1710 | struct iwch_qp *qp = get_qhp(h, conn_param->qpn); | |
1711 | ||
1712 | PDBG("%s ep %p tid %u\n", __FUNCTION__, ep, ep->hwtid); | |
1713 | if (state_read(&ep->com) == DEAD) { | |
1714 | put_ep(&ep->com); | |
1715 | return -ECONNRESET; | |
1716 | } | |
1717 | ||
1718 | BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); | |
1719 | BUG_ON(!qp); | |
1720 | ||
1721 | if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) || | |
1722 | (conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) { | |
1723 | abort_connection(ep, NULL, GFP_KERNEL); | |
1724 | return -EINVAL; | |
1725 | } | |
1726 | ||
1727 | cm_id->add_ref(cm_id); | |
1728 | ep->com.cm_id = cm_id; | |
1729 | ep->com.qp = qp; | |
1730 | ||
1731 | ep->com.rpl_done = 0; | |
1732 | ep->com.rpl_err = 0; | |
1733 | ep->ird = conn_param->ird; | |
1734 | ep->ord = conn_param->ord; | |
1735 | PDBG("%s %d ird %d ord %d\n", __FUNCTION__, __LINE__, ep->ird, ep->ord); | |
1736 | get_ep(&ep->com); | |
1737 | err = send_mpa_reply(ep, conn_param->private_data, | |
1738 | conn_param->private_data_len); | |
1739 | if (err) { | |
1740 | ep->com.cm_id = NULL; | |
1741 | ep->com.qp = NULL; | |
1742 | cm_id->rem_ref(cm_id); | |
1743 | abort_connection(ep, NULL, GFP_KERNEL); | |
1744 | put_ep(&ep->com); | |
1745 | return err; | |
1746 | } | |
1747 | ||
1748 | /* bind QP to EP and move to RTS */ | |
1749 | attrs.mpa_attr = ep->mpa_attr; | |
1750 | attrs.max_ird = ep->ord; | |
1751 | attrs.max_ord = ep->ord; | |
1752 | attrs.llp_stream_handle = ep; | |
1753 | attrs.next_state = IWCH_QP_STATE_RTS; | |
1754 | ||
1755 | /* bind QP and TID with INIT_WR */ | |
1756 | mask = IWCH_QP_ATTR_NEXT_STATE | | |
1757 | IWCH_QP_ATTR_LLP_STREAM_HANDLE | | |
1758 | IWCH_QP_ATTR_MPA_ATTR | | |
1759 | IWCH_QP_ATTR_MAX_IRD | | |
1760 | IWCH_QP_ATTR_MAX_ORD; | |
1761 | ||
1762 | err = iwch_modify_qp(ep->com.qp->rhp, | |
1763 | ep->com.qp, mask, &attrs, 1); | |
1764 | ||
1765 | if (err) { | |
1766 | ep->com.cm_id = NULL; | |
1767 | ep->com.qp = NULL; | |
1768 | cm_id->rem_ref(cm_id); | |
1769 | abort_connection(ep, NULL, GFP_KERNEL); | |
1770 | } else { | |
1771 | state_set(&ep->com, FPDU_MODE); | |
1772 | established_upcall(ep); | |
1773 | } | |
1774 | put_ep(&ep->com); | |
1775 | return err; | |
1776 | } | |
1777 | ||
1778 | int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
1779 | { | |
1780 | int err = 0; | |
1781 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1782 | struct iwch_ep *ep; | |
1783 | struct rtable *rt; | |
1784 | ||
1785 | ep = alloc_ep(sizeof(*ep), GFP_KERNEL); | |
1786 | if (!ep) { | |
1787 | printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __FUNCTION__); | |
1788 | err = -ENOMEM; | |
1789 | goto out; | |
1790 | } | |
1791 | init_timer(&ep->timer); | |
1792 | ep->plen = conn_param->private_data_len; | |
1793 | if (ep->plen) | |
1794 | memcpy(ep->mpa_pkt + sizeof(struct mpa_message), | |
1795 | conn_param->private_data, ep->plen); | |
1796 | ep->ird = conn_param->ird; | |
1797 | ep->ord = conn_param->ord; | |
1798 | ep->com.tdev = h->rdev.t3cdev_p; | |
1799 | ||
1800 | cm_id->add_ref(cm_id); | |
1801 | ep->com.cm_id = cm_id; | |
1802 | ep->com.qp = get_qhp(h, conn_param->qpn); | |
1803 | BUG_ON(!ep->com.qp); | |
1804 | PDBG("%s qpn 0x%x qp %p cm_id %p\n", __FUNCTION__, conn_param->qpn, | |
1805 | ep->com.qp, cm_id); | |
1806 | ||
1807 | /* | |
1808 | * Allocate an active TID to initiate a TCP connection. | |
1809 | */ | |
1810 | ep->atid = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep); | |
1811 | if (ep->atid == -1) { | |
1812 | printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __FUNCTION__); | |
1813 | err = -ENOMEM; | |
1814 | goto fail2; | |
1815 | } | |
1816 | ||
1817 | /* find a route */ | |
1818 | rt = find_route(h->rdev.t3cdev_p, | |
1819 | cm_id->local_addr.sin_addr.s_addr, | |
1820 | cm_id->remote_addr.sin_addr.s_addr, | |
1821 | cm_id->local_addr.sin_port, | |
1822 | cm_id->remote_addr.sin_port, IPTOS_LOWDELAY); | |
1823 | if (!rt) { | |
1824 | printk(KERN_ERR MOD "%s - cannot find route.\n", __FUNCTION__); | |
1825 | err = -EHOSTUNREACH; | |
1826 | goto fail3; | |
1827 | } | |
1828 | ep->dst = &rt->u.dst; | |
1829 | ||
1830 | /* get a l2t entry */ | |
1831 | ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst->neighbour, | |
1832 | ep->dst->neighbour->dev); | |
1833 | if (!ep->l2t) { | |
1834 | printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __FUNCTION__); | |
1835 | err = -ENOMEM; | |
1836 | goto fail4; | |
1837 | } | |
1838 | ||
1839 | state_set(&ep->com, CONNECTING); | |
1840 | ep->tos = IPTOS_LOWDELAY; | |
1841 | ep->com.local_addr = cm_id->local_addr; | |
1842 | ep->com.remote_addr = cm_id->remote_addr; | |
1843 | ||
1844 | /* send connect request to rnic */ | |
1845 | err = send_connect(ep); | |
1846 | if (!err) | |
1847 | goto out; | |
1848 | ||
1849 | l2t_release(L2DATA(h->rdev.t3cdev_p), ep->l2t); | |
1850 | fail4: | |
1851 | dst_release(ep->dst); | |
1852 | fail3: | |
1853 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
1854 | fail2: | |
1855 | put_ep(&ep->com); | |
1856 | out: | |
1857 | return err; | |
1858 | } | |
1859 | ||
1860 | int iwch_create_listen(struct iw_cm_id *cm_id, int backlog) | |
1861 | { | |
1862 | int err = 0; | |
1863 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1864 | struct iwch_listen_ep *ep; | |
1865 | ||
1866 | ||
1867 | might_sleep(); | |
1868 | ||
1869 | ep = alloc_ep(sizeof(*ep), GFP_KERNEL); | |
1870 | if (!ep) { | |
1871 | printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __FUNCTION__); | |
1872 | err = -ENOMEM; | |
1873 | goto fail1; | |
1874 | } | |
1875 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
1876 | ep->com.tdev = h->rdev.t3cdev_p; | |
1877 | cm_id->add_ref(cm_id); | |
1878 | ep->com.cm_id = cm_id; | |
1879 | ep->backlog = backlog; | |
1880 | ep->com.local_addr = cm_id->local_addr; | |
1881 | ||
1882 | /* | |
1883 | * Allocate a server TID. | |
1884 | */ | |
1885 | ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep); | |
1886 | if (ep->stid == -1) { | |
1887 | printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __FUNCTION__); | |
1888 | err = -ENOMEM; | |
1889 | goto fail2; | |
1890 | } | |
1891 | ||
1892 | state_set(&ep->com, LISTEN); | |
1893 | err = listen_start(ep); | |
1894 | if (err) | |
1895 | goto fail3; | |
1896 | ||
1897 | /* wait for pass_open_rpl */ | |
1898 | wait_event(ep->com.waitq, ep->com.rpl_done); | |
1899 | err = ep->com.rpl_err; | |
1900 | if (!err) { | |
1901 | cm_id->provider_data = ep; | |
1902 | goto out; | |
1903 | } | |
1904 | fail3: | |
1905 | cxgb3_free_stid(ep->com.tdev, ep->stid); | |
1906 | fail2: | |
1907 | put_ep(&ep->com); | |
1908 | fail1: | |
1909 | out: | |
1910 | return err; | |
1911 | } | |
1912 | ||
1913 | int iwch_destroy_listen(struct iw_cm_id *cm_id) | |
1914 | { | |
1915 | int err; | |
1916 | struct iwch_listen_ep *ep = to_listen_ep(cm_id); | |
1917 | ||
1918 | PDBG("%s ep %p\n", __FUNCTION__, ep); | |
1919 | ||
1920 | might_sleep(); | |
1921 | state_set(&ep->com, DEAD); | |
1922 | ep->com.rpl_done = 0; | |
1923 | ep->com.rpl_err = 0; | |
1924 | err = listen_stop(ep); | |
1925 | wait_event(ep->com.waitq, ep->com.rpl_done); | |
1926 | cxgb3_free_stid(ep->com.tdev, ep->stid); | |
1927 | err = ep->com.rpl_err; | |
1928 | cm_id->rem_ref(cm_id); | |
1929 | put_ep(&ep->com); | |
1930 | return err; | |
1931 | } | |
1932 | ||
1933 | int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp) | |
1934 | { | |
1935 | int ret=0; | |
1936 | unsigned long flags; | |
1937 | int close = 0; | |
1938 | ||
1939 | spin_lock_irqsave(&ep->com.lock, flags); | |
1940 | ||
1941 | PDBG("%s ep %p state %s, abrupt %d\n", __FUNCTION__, ep, | |
1942 | states[ep->com.state], abrupt); | |
1943 | ||
1944 | if (ep->com.state == DEAD) { | |
1945 | PDBG("%s already dead ep %p\n", __FUNCTION__, ep); | |
1946 | goto out; | |
1947 | } | |
1948 | ||
1949 | if (abrupt) { | |
1950 | if (ep->com.state != ABORTING) { | |
1951 | ep->com.state = ABORTING; | |
1952 | close = 1; | |
1953 | } | |
1954 | goto out; | |
1955 | } | |
1956 | ||
1957 | switch (ep->com.state) { | |
1958 | case MPA_REQ_WAIT: | |
1959 | case MPA_REQ_SENT: | |
1960 | case MPA_REQ_RCVD: | |
1961 | case MPA_REP_SENT: | |
1962 | case FPDU_MODE: | |
42e31753 | 1963 | start_ep_timer(ep); |
b038ced7 SW |
1964 | ep->com.state = CLOSING; |
1965 | close = 1; | |
1966 | break; | |
1967 | case CLOSING: | |
b038ced7 SW |
1968 | ep->com.state = MORIBUND; |
1969 | close = 1; | |
1970 | break; | |
1971 | case MORIBUND: | |
1972 | break; | |
1973 | default: | |
1974 | BUG(); | |
1975 | break; | |
1976 | } | |
1977 | out: | |
1978 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1979 | if (close) { | |
1980 | if (abrupt) | |
1981 | ret = send_abort(ep, NULL, gfp); | |
1982 | else | |
1983 | ret = send_halfclose(ep, gfp); | |
1984 | } | |
1985 | return ret; | |
1986 | } | |
1987 | ||
1988 | int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, | |
1989 | struct l2t_entry *l2t) | |
1990 | { | |
1991 | struct iwch_ep *ep = ctx; | |
1992 | ||
1993 | if (ep->dst != old) | |
1994 | return 0; | |
1995 | ||
1996 | PDBG("%s ep %p redirect to dst %p l2t %p\n", __FUNCTION__, ep, new, | |
1997 | l2t); | |
1998 | dst_hold(new); | |
1999 | l2t_release(L2DATA(ep->com.tdev), ep->l2t); | |
2000 | ep->l2t = l2t; | |
2001 | dst_release(old); | |
2002 | ep->dst = new; | |
2003 | return 1; | |
2004 | } | |
2005 | ||
2006 | /* | |
2007 | * All the CM events are handled on a work queue to have a safe context. | |
2008 | */ | |
2009 | static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
2010 | { | |
2011 | struct iwch_ep_common *epc = ctx; | |
2012 | ||
2013 | get_ep(epc); | |
2014 | ||
2015 | /* | |
2016 | * Save ctx and tdev in the skb->cb area. | |
2017 | */ | |
2018 | *((void **) skb->cb) = ctx; | |
2019 | *((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev; | |
2020 | ||
2021 | /* | |
2022 | * Queue the skb and schedule the worker thread. | |
2023 | */ | |
2024 | skb_queue_tail(&rxq, skb); | |
2025 | queue_work(workq, &skb_work); | |
2026 | return 0; | |
2027 | } | |
2028 | ||
1ca19770 SW |
2029 | static int set_tcb_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
2030 | { | |
2031 | struct cpl_set_tcb_rpl *rpl = cplhdr(skb); | |
2032 | ||
2033 | if (rpl->status != CPL_ERR_NONE) { | |
2034 | printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u " | |
2035 | "for tid %u\n", rpl->status, GET_TID(rpl)); | |
2036 | } | |
2037 | return CPL_RET_BUF_DONE; | |
2038 | } | |
2039 | ||
b038ced7 SW |
2040 | int __init iwch_cm_init(void) |
2041 | { | |
2042 | skb_queue_head_init(&rxq); | |
2043 | ||
2044 | workq = create_singlethread_workqueue("iw_cxgb3"); | |
2045 | if (!workq) | |
2046 | return -ENOMEM; | |
2047 | ||
2048 | /* | |
2049 | * All upcalls from the T3 Core go to sched() to | |
2050 | * schedule the processing on a work queue. | |
2051 | */ | |
2052 | t3c_handlers[CPL_ACT_ESTABLISH] = sched; | |
2053 | t3c_handlers[CPL_ACT_OPEN_RPL] = sched; | |
2054 | t3c_handlers[CPL_RX_DATA] = sched; | |
2055 | t3c_handlers[CPL_TX_DMA_ACK] = sched; | |
2056 | t3c_handlers[CPL_ABORT_RPL_RSS] = sched; | |
2057 | t3c_handlers[CPL_ABORT_RPL] = sched; | |
2058 | t3c_handlers[CPL_PASS_OPEN_RPL] = sched; | |
2059 | t3c_handlers[CPL_CLOSE_LISTSRV_RPL] = sched; | |
2060 | t3c_handlers[CPL_PASS_ACCEPT_REQ] = sched; | |
2061 | t3c_handlers[CPL_PASS_ESTABLISH] = sched; | |
2062 | t3c_handlers[CPL_PEER_CLOSE] = sched; | |
2063 | t3c_handlers[CPL_CLOSE_CON_RPL] = sched; | |
2064 | t3c_handlers[CPL_ABORT_REQ_RSS] = sched; | |
2065 | t3c_handlers[CPL_RDMA_TERMINATE] = sched; | |
2066 | t3c_handlers[CPL_RDMA_EC_STATUS] = sched; | |
1ca19770 | 2067 | t3c_handlers[CPL_SET_TCB_RPL] = set_tcb_rpl; |
b038ced7 SW |
2068 | |
2069 | /* | |
2070 | * These are the real handlers that are called from a | |
2071 | * work queue. | |
2072 | */ | |
2073 | work_handlers[CPL_ACT_ESTABLISH] = act_establish; | |
2074 | work_handlers[CPL_ACT_OPEN_RPL] = act_open_rpl; | |
2075 | work_handlers[CPL_RX_DATA] = rx_data; | |
2076 | work_handlers[CPL_TX_DMA_ACK] = tx_ack; | |
2077 | work_handlers[CPL_ABORT_RPL_RSS] = abort_rpl; | |
2078 | work_handlers[CPL_ABORT_RPL] = abort_rpl; | |
2079 | work_handlers[CPL_PASS_OPEN_RPL] = pass_open_rpl; | |
2080 | work_handlers[CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl; | |
2081 | work_handlers[CPL_PASS_ACCEPT_REQ] = pass_accept_req; | |
2082 | work_handlers[CPL_PASS_ESTABLISH] = pass_establish; | |
2083 | work_handlers[CPL_PEER_CLOSE] = peer_close; | |
2084 | work_handlers[CPL_ABORT_REQ_RSS] = peer_abort; | |
2085 | work_handlers[CPL_CLOSE_CON_RPL] = close_con_rpl; | |
2086 | work_handlers[CPL_RDMA_TERMINATE] = terminate; | |
2087 | work_handlers[CPL_RDMA_EC_STATUS] = ec_status; | |
2088 | return 0; | |
2089 | } | |
2090 | ||
2091 | void __exit iwch_cm_term(void) | |
2092 | { | |
2093 | flush_workqueue(workq); | |
2094 | destroy_workqueue(workq); | |
2095 | } |