?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux 3.4.102
[linux/fpc-iii.git] / drivers / infiniband / hw / cxgb4 / cm.c
blob4c7c62fe49d34d790db67f031a18f3f6c5b9adc5
1 /*
2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32 #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 #include <linux/inetdevice.h>
39 #include <linux/ip.h>
40 #include <linux/tcp.h>
41
42 #include <net/neighbour.h>
43 #include <net/netevent.h>
44 #include <net/route.h>
45
46 #include "iw_cxgb4.h"
47
48 static char *states[] = {
49 "idle",
50 "listen",
51 "connecting",
52 "mpa_wait_req",
53 "mpa_req_sent",
54 "mpa_req_rcvd",
55 "mpa_rep_sent",
56 "fpdu_mode",
57 "aborting",
58 "closing",
59 "moribund",
60 "dead",
61 NULL,
62 };
63
64 static int dack_mode = 1;
65 module_param(dack_mode, int, 0644);
66 MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
67
68 int c4iw_max_read_depth = 8;
69 module_param(c4iw_max_read_depth, int, 0644);
70 MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)");
71
72 static int enable_tcp_timestamps;
73 module_param(enable_tcp_timestamps, int, 0644);
74 MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
75
76 static int enable_tcp_sack;
77 module_param(enable_tcp_sack, int, 0644);
78 MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
79
80 static int enable_tcp_window_scaling = 1;
81 module_param(enable_tcp_window_scaling, int, 0644);
82 MODULE_PARM_DESC(enable_tcp_window_scaling,
83 "Enable tcp window scaling (default=1)");
84
85 int c4iw_debug;
86 module_param(c4iw_debug, int, 0644);
87 MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
88
89 static int peer2peer;
90 module_param(peer2peer, int, 0644);
91 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
92
93 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
94 module_param(p2p_type, int, 0644);
95 MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
96 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
97
98 static int ep_timeout_secs = 60;
99 module_param(ep_timeout_secs, int, 0644);
100 MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
101 "in seconds (default=60)");
102
103 static int mpa_rev = 1;
104 module_param(mpa_rev, int, 0644);
105 MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
106 "1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft"
107 " compliant (default=1)");
108
109 static int markers_enabled;
110 module_param(markers_enabled, int, 0644);
111 MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
112
113 static int crc_enabled = 1;
114 module_param(crc_enabled, int, 0644);
115 MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
116
117 static int rcv_win = 256 * 1024;
118 module_param(rcv_win, int, 0644);
119 MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
120
121 static int snd_win = 128 * 1024;
122 module_param(snd_win, int, 0644);
123 MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
124
125 static struct workqueue_struct *workq;
126
127 static struct sk_buff_head rxq;
128
129 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
130 static void ep_timeout(unsigned long arg);
131 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
132
133 static LIST_HEAD(timeout_list);
134 static spinlock_t timeout_lock;
135
136 static void start_ep_timer(struct c4iw_ep *ep)
137 {
138 PDBG("%s ep %p\n", __func__, ep);
139 if (timer_pending(&ep->timer)) {
140 PDBG("%s stopped / restarted timer ep %p\n", __func__, ep);
141 del_timer_sync(&ep->timer);
142 } else
143 c4iw_get_ep(&ep->com);
144 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
145 ep->timer.data = (unsigned long)ep;
146 ep->timer.function = ep_timeout;
147 add_timer(&ep->timer);
148 }
149
150 static void stop_ep_timer(struct c4iw_ep *ep)
151 {
152 PDBG("%s ep %p\n", __func__, ep);
153 if (!timer_pending(&ep->timer)) {
154 printk(KERN_ERR "%s timer stopped when its not running! "
155 "ep %p state %u\n", __func__, ep, ep->com.state);
156 WARN_ON(1);
157 return;
158 }
159 del_timer_sync(&ep->timer);
160 c4iw_put_ep(&ep->com);
161 }
162
163 static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
164 struct l2t_entry *l2e)
165 {
166 int error = 0;
167
168 if (c4iw_fatal_error(rdev)) {
169 kfree_skb(skb);
170 PDBG("%s - device in error state - dropping\n", __func__);
171 return -EIO;
172 }
173 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
174 if (error < 0)
175 kfree_skb(skb);
176 return error < 0 ? error : 0;
177 }
178
179 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
180 {
181 int error = 0;
182
183 if (c4iw_fatal_error(rdev)) {
184 kfree_skb(skb);
185 PDBG("%s - device in error state - dropping\n", __func__);
186 return -EIO;
187 }
188 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
189 if (error < 0)
190 kfree_skb(skb);
191 return error < 0 ? error : 0;
192 }
193
194 static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
195 {
196 struct cpl_tid_release *req;
197
198 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
199 if (!skb)
200 return;
201 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
202 INIT_TP_WR(req, hwtid);
203 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
204 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
205 c4iw_ofld_send(rdev, skb);
206 return;
207 }
208
209 static void set_emss(struct c4iw_ep *ep, u16 opt)
210 {
211 ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
212 ep->mss = ep->emss;
213 if (GET_TCPOPT_TSTAMP(opt))
214 ep->emss -= 12;
215 if (ep->emss < 128)
216 ep->emss = 128;
217 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
218 ep->mss, ep->emss);
219 }
220
221 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
222 {
223 enum c4iw_ep_state state;
224
225 mutex_lock(&epc->mutex);
226 state = epc->state;
227 mutex_unlock(&epc->mutex);
228 return state;
229 }
230
231 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
232 {
233 epc->state = new;
234 }
235
236 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
237 {
238 mutex_lock(&epc->mutex);
239 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
240 __state_set(epc, new);
241 mutex_unlock(&epc->mutex);
242 return;
243 }
244
245 static void *alloc_ep(int size, gfp_t gfp)
246 {
247 struct c4iw_ep_common *epc;
248
249 epc = kzalloc(size, gfp);
250 if (epc) {
251 kref_init(&epc->kref);
252 mutex_init(&epc->mutex);
253 c4iw_init_wr_wait(&epc->wr_wait);
254 }
255 PDBG("%s alloc ep %p\n", __func__, epc);
256 return epc;
257 }
258
259 void _c4iw_free_ep(struct kref *kref)
260 {
261 struct c4iw_ep *ep;
262
263 ep = container_of(kref, struct c4iw_ep, com.kref);
264 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
265 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
266 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
267 dst_release(ep->dst);
268 cxgb4_l2t_release(ep->l2t);
269 }
270 kfree(ep);
271 }
272
273 static void release_ep_resources(struct c4iw_ep *ep)
274 {
275 set_bit(RELEASE_RESOURCES, &ep->com.flags);
276 c4iw_put_ep(&ep->com);
277 }
278
279 static int status2errno(int status)
280 {
281 switch (status) {
282 case CPL_ERR_NONE:
283 return 0;
284 case CPL_ERR_CONN_RESET:
285 return -ECONNRESET;
286 case CPL_ERR_ARP_MISS:
287 return -EHOSTUNREACH;
288 case CPL_ERR_CONN_TIMEDOUT:
289 return -ETIMEDOUT;
290 case CPL_ERR_TCAM_FULL:
291 return -ENOMEM;
292 case CPL_ERR_CONN_EXIST:
293 return -EADDRINUSE;
294 default:
295 return -EIO;
296 }
297 }
298
299 /*
300 * Try and reuse skbs already allocated...
301 */
302 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
303 {
304 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
305 skb_trim(skb, 0);
306 skb_get(skb);
307 skb_reset_transport_header(skb);
308 } else {
309 skb = alloc_skb(len, gfp);
310 }
311 return skb;
312 }
313
314 static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip,
315 __be32 peer_ip, __be16 local_port,
316 __be16 peer_port, u8 tos)
317 {
318 struct rtable *rt;
319 struct flowi4 fl4;
320
321 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
322 peer_port, local_port, IPPROTO_TCP,
323 tos, 0);
324 if (IS_ERR(rt))
325 return NULL;
326 return rt;
327 }
328
329 static void arp_failure_discard(void *handle, struct sk_buff *skb)
330 {
331 PDBG("%s c4iw_dev %p\n", __func__, handle);
332 kfree_skb(skb);
333 }
334
335 /*
336 * Handle an ARP failure for an active open.
337 */
338 static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
339 {
340 printk(KERN_ERR MOD "ARP failure duing connect\n");
341 kfree_skb(skb);
342 }
343
344 /*
345 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
346 * and send it along.
347 */
348 static void abort_arp_failure(void *handle, struct sk_buff *skb)
349 {
350 struct c4iw_rdev *rdev = handle;
351 struct cpl_abort_req *req = cplhdr(skb);
352
353 PDBG("%s rdev %p\n", __func__, rdev);
354 req->cmd = CPL_ABORT_NO_RST;
355 c4iw_ofld_send(rdev, skb);
356 }
357
358 static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
359 {
360 unsigned int flowclen = 80;
361 struct fw_flowc_wr *flowc;
362 int i;
363
364 skb = get_skb(skb, flowclen, GFP_KERNEL);
365 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
366
367 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
368 FW_FLOWC_WR_NPARAMS(8));
369 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
370 16)) | FW_WR_FLOWID(ep->hwtid));
371
372 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
373 flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
374 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
375 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
376 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
377 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
378 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
379 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
380 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
381 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
382 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
383 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
384 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
385 flowc->mnemval[6].val = cpu_to_be32(snd_win);
386 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
387 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
388 /* Pad WR to 16 byte boundary */
389 flowc->mnemval[8].mnemonic = 0;
390 flowc->mnemval[8].val = 0;
391 for (i = 0; i < 9; i++) {
392 flowc->mnemval[i].r4[0] = 0;
393 flowc->mnemval[i].r4[1] = 0;
394 flowc->mnemval[i].r4[2] = 0;
395 }
396
397 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
398 c4iw_ofld_send(&ep->com.dev->rdev, skb);
399 }
400
401 static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
402 {
403 struct cpl_close_con_req *req;
404 struct sk_buff *skb;
405 int wrlen = roundup(sizeof *req, 16);
406
407 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
408 skb = get_skb(NULL, wrlen, gfp);
409 if (!skb) {
410 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
411 return -ENOMEM;
412 }
413 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
414 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
415 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
416 memset(req, 0, wrlen);
417 INIT_TP_WR(req, ep->hwtid);
418 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
419 ep->hwtid));
420 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
421 }
422
423 static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
424 {
425 struct cpl_abort_req *req;
426 int wrlen = roundup(sizeof *req, 16);
427
428 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
429 skb = get_skb(skb, wrlen, gfp);
430 if (!skb) {
431 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
432 __func__);
433 return -ENOMEM;
434 }
435 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
436 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
437 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
438 memset(req, 0, wrlen);
439 INIT_TP_WR(req, ep->hwtid);
440 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
441 req->cmd = CPL_ABORT_SEND_RST;
442 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
443 }
444
445 static int send_connect(struct c4iw_ep *ep)
446 {
447 struct cpl_act_open_req *req;
448 struct sk_buff *skb;
449 u64 opt0;
450 u32 opt2;
451 unsigned int mtu_idx;
452 int wscale;
453 int wrlen = roundup(sizeof *req, 16);
454
455 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
456
457 skb = get_skb(NULL, wrlen, GFP_KERNEL);
458 if (!skb) {
459 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
460 __func__);
461 return -ENOMEM;
462 }
463 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
464
465 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
466 wscale = compute_wscale(rcv_win);
467 opt0 = KEEP_ALIVE(1) |
468 DELACK(1) |
469 WND_SCALE(wscale) |
470 MSS_IDX(mtu_idx) |
471 L2T_IDX(ep->l2t->idx) |
472 TX_CHAN(ep->tx_chan) |
473 SMAC_SEL(ep->smac_idx) |
474 DSCP(ep->tos) |
475 ULP_MODE(ULP_MODE_TCPDDP) |
476 RCV_BUFSIZ(rcv_win>>10);
477 opt2 = RX_CHANNEL(0) |
478 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
479 if (enable_tcp_timestamps)
480 opt2 |= TSTAMPS_EN(1);
481 if (enable_tcp_sack)
482 opt2 |= SACK_EN(1);
483 if (wscale && enable_tcp_window_scaling)
484 opt2 |= WND_SCALE_EN(1);
485 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
486
487 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
488 INIT_TP_WR(req, 0);
489 OPCODE_TID(req) = cpu_to_be32(
490 MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ((ep->rss_qid<<14)|ep->atid)));
491 req->local_port = ep->com.local_addr.sin_port;
492 req->peer_port = ep->com.remote_addr.sin_port;
493 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
494 req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
495 req->opt0 = cpu_to_be64(opt0);
496 req->params = 0;
497 req->opt2 = cpu_to_be32(opt2);
498 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
499 }
500
501 static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
502 u8 mpa_rev_to_use)
503 {
504 int mpalen, wrlen;
505 struct fw_ofld_tx_data_wr *req;
506 struct mpa_message *mpa;
507 struct mpa_v2_conn_params mpa_v2_params;
508
509 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
510
511 BUG_ON(skb_cloned(skb));
512
513 mpalen = sizeof(*mpa) + ep->plen;
514 if (mpa_rev_to_use == 2)
515 mpalen += sizeof(struct mpa_v2_conn_params);
516 wrlen = roundup(mpalen + sizeof *req, 16);
517 skb = get_skb(skb, wrlen, GFP_KERNEL);
518 if (!skb) {
519 connect_reply_upcall(ep, -ENOMEM);
520 return;
521 }
522 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
523
524 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
525 memset(req, 0, wrlen);
526 req->op_to_immdlen = cpu_to_be32(
527 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
528 FW_WR_COMPL(1) |
529 FW_WR_IMMDLEN(mpalen));
530 req->flowid_len16 = cpu_to_be32(
531 FW_WR_FLOWID(ep->hwtid) |
532 FW_WR_LEN16(wrlen >> 4));
533 req->plen = cpu_to_be32(mpalen);
534 req->tunnel_to_proxy = cpu_to_be32(
535 FW_OFLD_TX_DATA_WR_FLUSH(1) |
536 FW_OFLD_TX_DATA_WR_SHOVE(1));
537
538 mpa = (struct mpa_message *)(req + 1);
539 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
540 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
541 (markers_enabled ? MPA_MARKERS : 0) |
542 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
543 mpa->private_data_size = htons(ep->plen);
544 mpa->revision = mpa_rev_to_use;
545 if (mpa_rev_to_use == 1) {
546 ep->tried_with_mpa_v1 = 1;
547 ep->retry_with_mpa_v1 = 0;
548 }
549
550 if (mpa_rev_to_use == 2) {
551 mpa->private_data_size +=
552 htons(sizeof(struct mpa_v2_conn_params));
553 mpa_v2_params.ird = htons((u16)ep->ird);
554 mpa_v2_params.ord = htons((u16)ep->ord);
555
556 if (peer2peer) {
557 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
558 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
559 mpa_v2_params.ord |=
560 htons(MPA_V2_RDMA_WRITE_RTR);
561 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
562 mpa_v2_params.ord |=
563 htons(MPA_V2_RDMA_READ_RTR);
564 }
565 memcpy(mpa->private_data, &mpa_v2_params,
566 sizeof(struct mpa_v2_conn_params));
567
568 if (ep->plen)
569 memcpy(mpa->private_data +
570 sizeof(struct mpa_v2_conn_params),
571 ep->mpa_pkt + sizeof(*mpa), ep->plen);
572 } else
573 if (ep->plen)
574 memcpy(mpa->private_data,
575 ep->mpa_pkt + sizeof(*mpa), ep->plen);
576
577 /*
578 * Reference the mpa skb. This ensures the data area
579 * will remain in memory until the hw acks the tx.
580 * Function fw4_ack() will deref it.
581 */
582 skb_get(skb);
583 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
584 BUG_ON(ep->mpa_skb);
585 ep->mpa_skb = skb;
586 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
587 start_ep_timer(ep);
588 state_set(&ep->com, MPA_REQ_SENT);
589 ep->mpa_attr.initiator = 1;
590 return;
591 }
592
593 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
594 {
595 int mpalen, wrlen;
596 struct fw_ofld_tx_data_wr *req;
597 struct mpa_message *mpa;
598 struct sk_buff *skb;
599 struct mpa_v2_conn_params mpa_v2_params;
600
601 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
602
603 mpalen = sizeof(*mpa) + plen;
604 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
605 mpalen += sizeof(struct mpa_v2_conn_params);
606 wrlen = roundup(mpalen + sizeof *req, 16);
607
608 skb = get_skb(NULL, wrlen, GFP_KERNEL);
609 if (!skb) {
610 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
611 return -ENOMEM;
612 }
613 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
614
615 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
616 memset(req, 0, wrlen);
617 req->op_to_immdlen = cpu_to_be32(
618 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
619 FW_WR_COMPL(1) |
620 FW_WR_IMMDLEN(mpalen));
621 req->flowid_len16 = cpu_to_be32(
622 FW_WR_FLOWID(ep->hwtid) |
623 FW_WR_LEN16(wrlen >> 4));
624 req->plen = cpu_to_be32(mpalen);
625 req->tunnel_to_proxy = cpu_to_be32(
626 FW_OFLD_TX_DATA_WR_FLUSH(1) |
627 FW_OFLD_TX_DATA_WR_SHOVE(1));
628
629 mpa = (struct mpa_message *)(req + 1);
630 memset(mpa, 0, sizeof(*mpa));
631 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
632 mpa->flags = MPA_REJECT;
633 mpa->revision = mpa_rev;
634 mpa->private_data_size = htons(plen);
635
636 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
637 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
638 mpa->private_data_size +=
639 htons(sizeof(struct mpa_v2_conn_params));
640 mpa_v2_params.ird = htons(((u16)ep->ird) |
641 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
642 0));
643 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
644 (p2p_type ==
645 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
646 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
647 FW_RI_INIT_P2PTYPE_READ_REQ ?
648 MPA_V2_RDMA_READ_RTR : 0) : 0));
649 memcpy(mpa->private_data, &mpa_v2_params,
650 sizeof(struct mpa_v2_conn_params));
651
652 if (ep->plen)
653 memcpy(mpa->private_data +
654 sizeof(struct mpa_v2_conn_params), pdata, plen);
655 } else
656 if (plen)
657 memcpy(mpa->private_data, pdata, plen);
658
659 /*
660 * Reference the mpa skb again. This ensures the data area
661 * will remain in memory until the hw acks the tx.
662 * Function fw4_ack() will deref it.
663 */
664 skb_get(skb);
665 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
666 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
667 BUG_ON(ep->mpa_skb);
668 ep->mpa_skb = skb;
669 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
670 }
671
672 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
673 {
674 int mpalen, wrlen;
675 struct fw_ofld_tx_data_wr *req;
676 struct mpa_message *mpa;
677 struct sk_buff *skb;
678 struct mpa_v2_conn_params mpa_v2_params;
679
680 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
681
682 mpalen = sizeof(*mpa) + plen;
683 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
684 mpalen += sizeof(struct mpa_v2_conn_params);
685 wrlen = roundup(mpalen + sizeof *req, 16);
686
687 skb = get_skb(NULL, wrlen, GFP_KERNEL);
688 if (!skb) {
689 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
690 return -ENOMEM;
691 }
692 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
693
694 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
695 memset(req, 0, wrlen);
696 req->op_to_immdlen = cpu_to_be32(
697 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
698 FW_WR_COMPL(1) |
699 FW_WR_IMMDLEN(mpalen));
700 req->flowid_len16 = cpu_to_be32(
701 FW_WR_FLOWID(ep->hwtid) |
702 FW_WR_LEN16(wrlen >> 4));
703 req->plen = cpu_to_be32(mpalen);
704 req->tunnel_to_proxy = cpu_to_be32(
705 FW_OFLD_TX_DATA_WR_FLUSH(1) |
706 FW_OFLD_TX_DATA_WR_SHOVE(1));
707
708 mpa = (struct mpa_message *)(req + 1);
709 memset(mpa, 0, sizeof(*mpa));
710 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
711 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
712 (markers_enabled ? MPA_MARKERS : 0);
713 mpa->revision = ep->mpa_attr.version;
714 mpa->private_data_size = htons(plen);
715
716 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
717 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
718 mpa->private_data_size +=
719 htons(sizeof(struct mpa_v2_conn_params));
720 mpa_v2_params.ird = htons((u16)ep->ird);
721 mpa_v2_params.ord = htons((u16)ep->ord);
722 if (peer2peer && (ep->mpa_attr.p2p_type !=
723 FW_RI_INIT_P2PTYPE_DISABLED)) {
724 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
725
726 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
727 mpa_v2_params.ord |=
728 htons(MPA_V2_RDMA_WRITE_RTR);
729 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
730 mpa_v2_params.ord |=
731 htons(MPA_V2_RDMA_READ_RTR);
732 }
733
734 memcpy(mpa->private_data, &mpa_v2_params,
735 sizeof(struct mpa_v2_conn_params));
736
737 if (ep->plen)
738 memcpy(mpa->private_data +
739 sizeof(struct mpa_v2_conn_params), pdata, plen);
740 } else
741 if (plen)
742 memcpy(mpa->private_data, pdata, plen);
743
744 /*
745 * Reference the mpa skb. This ensures the data area
746 * will remain in memory until the hw acks the tx.
747 * Function fw4_ack() will deref it.
748 */
749 skb_get(skb);
750 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
751 ep->mpa_skb = skb;
752 state_set(&ep->com, MPA_REP_SENT);
753 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
754 }
755
756 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
757 {
758 struct c4iw_ep *ep;
759 struct cpl_act_establish *req = cplhdr(skb);
760 unsigned int tid = GET_TID(req);
761 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
762 struct tid_info *t = dev->rdev.lldi.tids;
763
764 ep = lookup_atid(t, atid);
765
766 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
767 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
768
769 dst_confirm(ep->dst);
770
771 /* setup the hwtid for this connection */
772 ep->hwtid = tid;
773 cxgb4_insert_tid(t, ep, tid);
774
775 ep->snd_seq = be32_to_cpu(req->snd_isn);
776 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
777
778 set_emss(ep, ntohs(req->tcp_opt));
779
780 /* dealloc the atid */
781 cxgb4_free_atid(t, atid);
782
783 /* start MPA negotiation */
784 send_flowc(ep, NULL);
785 if (ep->retry_with_mpa_v1)
786 send_mpa_req(ep, skb, 1);
787 else
788 send_mpa_req(ep, skb, mpa_rev);
789
790 return 0;
791 }
792
793 static void close_complete_upcall(struct c4iw_ep *ep)
794 {
795 struct iw_cm_event event;
796
797 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
798 memset(&event, 0, sizeof(event));
799 event.event = IW_CM_EVENT_CLOSE;
800 if (ep->com.cm_id) {
801 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
802 ep, ep->com.cm_id, ep->hwtid);
803 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
804 ep->com.cm_id->rem_ref(ep->com.cm_id);
805 ep->com.cm_id = NULL;
806 ep->com.qp = NULL;
807 }
808 }
809
810 static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
811 {
812 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
813 close_complete_upcall(ep);
814 state_set(&ep->com, ABORTING);
815 return send_abort(ep, skb, gfp);
816 }
817
818 static void peer_close_upcall(struct c4iw_ep *ep)
819 {
820 struct iw_cm_event event;
821
822 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
823 memset(&event, 0, sizeof(event));
824 event.event = IW_CM_EVENT_DISCONNECT;
825 if (ep->com.cm_id) {
826 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
827 ep, ep->com.cm_id, ep->hwtid);
828 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
829 }
830 }
831
832 static void peer_abort_upcall(struct c4iw_ep *ep)
833 {
834 struct iw_cm_event event;
835
836 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
837 memset(&event, 0, sizeof(event));
838 event.event = IW_CM_EVENT_CLOSE;
839 event.status = -ECONNRESET;
840 if (ep->com.cm_id) {
841 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
842 ep->com.cm_id, ep->hwtid);
843 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
844 ep->com.cm_id->rem_ref(ep->com.cm_id);
845 ep->com.cm_id = NULL;
846 ep->com.qp = NULL;
847 }
848 }
849
850 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
851 {
852 struct iw_cm_event event;
853
854 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
855 memset(&event, 0, sizeof(event));
856 event.event = IW_CM_EVENT_CONNECT_REPLY;
857 event.status = status;
858 event.local_addr = ep->com.local_addr;
859 event.remote_addr = ep->com.remote_addr;
860
861 if ((status == 0) || (status == -ECONNREFUSED)) {
862 if (!ep->tried_with_mpa_v1) {
863 /* this means MPA_v2 is used */
864 event.private_data_len = ep->plen -
865 sizeof(struct mpa_v2_conn_params);
866 event.private_data = ep->mpa_pkt +
867 sizeof(struct mpa_message) +
868 sizeof(struct mpa_v2_conn_params);
869 } else {
870 /* this means MPA_v1 is used */
871 event.private_data_len = ep->plen;
872 event.private_data = ep->mpa_pkt +
873 sizeof(struct mpa_message);
874 }
875 }
876
877 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
878 ep->hwtid, status);
879 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
880
881 if (status < 0) {
882 ep->com.cm_id->rem_ref(ep->com.cm_id);
883 ep->com.cm_id = NULL;
884 ep->com.qp = NULL;
885 }
886 }
887
888 static void connect_request_upcall(struct c4iw_ep *ep)
889 {
890 struct iw_cm_event event;
891
892 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
893 memset(&event, 0, sizeof(event));
894 event.event = IW_CM_EVENT_CONNECT_REQUEST;
895 event.local_addr = ep->com.local_addr;
896 event.remote_addr = ep->com.remote_addr;
897 event.provider_data = ep;
898 if (!ep->tried_with_mpa_v1) {
899 /* this means MPA_v2 is used */
900 event.ord = ep->ord;
901 event.ird = ep->ird;
902 event.private_data_len = ep->plen -
903 sizeof(struct mpa_v2_conn_params);
904 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
905 sizeof(struct mpa_v2_conn_params);
906 } else {
907 /* this means MPA_v1 is used. Send max supported */
908 event.ord = c4iw_max_read_depth;
909 event.ird = c4iw_max_read_depth;
910 event.private_data_len = ep->plen;
911 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
912 }
913 if (state_read(&ep->parent_ep->com) != DEAD) {
914 c4iw_get_ep(&ep->com);
915 ep->parent_ep->com.cm_id->event_handler(
916 ep->parent_ep->com.cm_id,
917 &event);
918 }
919 c4iw_put_ep(&ep->parent_ep->com);
920 ep->parent_ep = NULL;
921 }
922
923 static void established_upcall(struct c4iw_ep *ep)
924 {
925 struct iw_cm_event event;
926
927 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
928 memset(&event, 0, sizeof(event));
929 event.event = IW_CM_EVENT_ESTABLISHED;
930 event.ird = ep->ird;
931 event.ord = ep->ord;
932 if (ep->com.cm_id) {
933 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
934 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
935 }
936 }
937
938 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
939 {
940 struct cpl_rx_data_ack *req;
941 struct sk_buff *skb;
942 int wrlen = roundup(sizeof *req, 16);
943
944 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
945 skb = get_skb(NULL, wrlen, GFP_KERNEL);
946 if (!skb) {
947 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
948 return 0;
949 }
950
951 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
952 memset(req, 0, wrlen);
953 INIT_TP_WR(req, ep->hwtid);
954 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
955 ep->hwtid));
956 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
957 F_RX_DACK_CHANGE |
958 V_RX_DACK_MODE(dack_mode));
959 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
960 c4iw_ofld_send(&ep->com.dev->rdev, skb);
961 return credits;
962 }
963
964 static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
965 {
966 struct mpa_message *mpa;
967 struct mpa_v2_conn_params *mpa_v2_params;
968 u16 plen;
969 u16 resp_ird, resp_ord;
970 u8 rtr_mismatch = 0, insuff_ird = 0;
971 struct c4iw_qp_attributes attrs;
972 enum c4iw_qp_attr_mask mask;
973 int err;
974
975 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
976
977 /*
978 * Stop mpa timer. If it expired, then the state has
979 * changed and we bail since ep_timeout already aborted
980 * the connection.
981 */
982 stop_ep_timer(ep);
983 if (state_read(&ep->com) != MPA_REQ_SENT)
984 return;
985
986 /*
987 * If we get more than the supported amount of private data
988 * then we must fail this connection.
989 */
990 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
991 err = -EINVAL;
992 goto err;
993 }
994
995 /*
996 * copy the new data into our accumulation buffer.
997 */
998 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
999 skb->len);
1000 ep->mpa_pkt_len += skb->len;
1001
1002 /*
1003 * if we don't even have the mpa message, then bail.
1004 */
1005 if (ep->mpa_pkt_len < sizeof(*mpa))
1006 return;
1007 mpa = (struct mpa_message *) ep->mpa_pkt;
1008
1009 /* Validate MPA header. */
1010 if (mpa->revision > mpa_rev) {
1011 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1012 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1013 err = -EPROTO;
1014 goto err;
1015 }
1016 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1017 err = -EPROTO;
1018 goto err;
1019 }
1020
1021 plen = ntohs(mpa->private_data_size);
1022
1023 /*
1024 * Fail if there's too much private data.
1025 */
1026 if (plen > MPA_MAX_PRIVATE_DATA) {
1027 err = -EPROTO;
1028 goto err;
1029 }
1030
1031 /*
1032 * If plen does not account for pkt size
1033 */
1034 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1035 err = -EPROTO;
1036 goto err;
1037 }
1038
1039 ep->plen = (u8) plen;
1040
1041 /*
1042 * If we don't have all the pdata yet, then bail.
1043 * We'll continue process when more data arrives.
1044 */
1045 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1046 return;
1047
1048 if (mpa->flags & MPA_REJECT) {
1049 err = -ECONNREFUSED;
1050 goto err;
1051 }
1052
1053 /*
1054 * If we get here we have accumulated the entire mpa
1055 * start reply message including private data. And
1056 * the MPA header is valid.
1057 */
1058 state_set(&ep->com, FPDU_MODE);
1059 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1060 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1061 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1062 ep->mpa_attr.version = mpa->revision;
1063 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1064
1065 if (mpa->revision == 2) {
1066 ep->mpa_attr.enhanced_rdma_conn =
1067 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1068 if (ep->mpa_attr.enhanced_rdma_conn) {
1069 mpa_v2_params = (struct mpa_v2_conn_params *)
1070 (ep->mpa_pkt + sizeof(*mpa));
1071 resp_ird = ntohs(mpa_v2_params->ird) &
1072 MPA_V2_IRD_ORD_MASK;
1073 resp_ord = ntohs(mpa_v2_params->ord) &
1074 MPA_V2_IRD_ORD_MASK;
1075
1076 /*
1077 * This is a double-check. Ideally, below checks are
1078 * not required since ird/ord stuff has been taken
1079 * care of in c4iw_accept_cr
1080 */
1081 if ((ep->ird < resp_ord) || (ep->ord > resp_ird)) {
1082 err = -ENOMEM;
1083 ep->ird = resp_ord;
1084 ep->ord = resp_ird;
1085 insuff_ird = 1;
1086 }
1087
1088 if (ntohs(mpa_v2_params->ird) &
1089 MPA_V2_PEER2PEER_MODEL) {
1090 if (ntohs(mpa_v2_params->ord) &
1091 MPA_V2_RDMA_WRITE_RTR)
1092 ep->mpa_attr.p2p_type =
1093 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1094 else if (ntohs(mpa_v2_params->ord) &
1095 MPA_V2_RDMA_READ_RTR)
1096 ep->mpa_attr.p2p_type =
1097 FW_RI_INIT_P2PTYPE_READ_REQ;
1098 }
1099 }
1100 } else if (mpa->revision == 1)
1101 if (peer2peer)
1102 ep->mpa_attr.p2p_type = p2p_type;
1103
1104 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1105 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1106 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1107 ep->mpa_attr.recv_marker_enabled,
1108 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1109 ep->mpa_attr.p2p_type, p2p_type);
1110
1111 /*
1112 * If responder's RTR does not match with that of initiator, assign
1113 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1114 * generated when moving QP to RTS state.
1115 * A TERM message will be sent after QP has moved to RTS state
1116 */
1117 if ((ep->mpa_attr.version == 2) && peer2peer &&
1118 (ep->mpa_attr.p2p_type != p2p_type)) {
1119 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1120 rtr_mismatch = 1;
1121 }
1122
1123 attrs.mpa_attr = ep->mpa_attr;
1124 attrs.max_ird = ep->ird;
1125 attrs.max_ord = ep->ord;
1126 attrs.llp_stream_handle = ep;
1127 attrs.next_state = C4IW_QP_STATE_RTS;
1128
1129 mask = C4IW_QP_ATTR_NEXT_STATE |
1130 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1131 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1132
1133 /* bind QP and TID with INIT_WR */
1134 err = c4iw_modify_qp(ep->com.qp->rhp,
1135 ep->com.qp, mask, &attrs, 1);
1136 if (err)
1137 goto err;
1138
1139 /*
1140 * If responder's RTR requirement did not match with what initiator
1141 * supports, generate TERM message
1142 */
1143 if (rtr_mismatch) {
1144 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1145 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1146 attrs.ecode = MPA_NOMATCH_RTR;
1147 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1148 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1149 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1150 err = -ENOMEM;
1151 goto out;
1152 }
1153
1154 /*
1155 * Generate TERM if initiator IRD is not sufficient for responder
1156 * provided ORD. Currently, we do the same behaviour even when
1157 * responder provided IRD is also not sufficient as regards to
1158 * initiator ORD.
1159 */
1160 if (insuff_ird) {
1161 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1162 __func__);
1163 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1164 attrs.ecode = MPA_INSUFF_IRD;
1165 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1166 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1167 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1168 err = -ENOMEM;
1169 goto out;
1170 }
1171 goto out;
1172 err:
1173 state_set(&ep->com, ABORTING);
1174 send_abort(ep, skb, GFP_KERNEL);
1175 out:
1176 connect_reply_upcall(ep, err);
1177 return;
1178 }
1179
1180 static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1181 {
1182 struct mpa_message *mpa;
1183 struct mpa_v2_conn_params *mpa_v2_params;
1184 u16 plen;
1185
1186 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1187
1188 if (state_read(&ep->com) != MPA_REQ_WAIT)
1189 return;
1190
1191 /*
1192 * If we get more than the supported amount of private data
1193 * then we must fail this connection.
1194 */
1195 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1196 stop_ep_timer(ep);
1197 abort_connection(ep, skb, GFP_KERNEL);
1198 return;
1199 }
1200
1201 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1202
1203 /*
1204 * Copy the new data into our accumulation buffer.
1205 */
1206 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1207 skb->len);
1208 ep->mpa_pkt_len += skb->len;
1209
1210 /*
1211 * If we don't even have the mpa message, then bail.
1212 * We'll continue process when more data arrives.
1213 */
1214 if (ep->mpa_pkt_len < sizeof(*mpa))
1215 return;
1216
1217 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1218 stop_ep_timer(ep);
1219 mpa = (struct mpa_message *) ep->mpa_pkt;
1220
1221 /*
1222 * Validate MPA Header.
1223 */
1224 if (mpa->revision > mpa_rev) {
1225 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1226 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1227 abort_connection(ep, skb, GFP_KERNEL);
1228 return;
1229 }
1230
1231 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1232 abort_connection(ep, skb, GFP_KERNEL);
1233 return;
1234 }
1235
1236 plen = ntohs(mpa->private_data_size);
1237
1238 /*
1239 * Fail if there's too much private data.
1240 */
1241 if (plen > MPA_MAX_PRIVATE_DATA) {
1242 abort_connection(ep, skb, GFP_KERNEL);
1243 return;
1244 }
1245
1246 /*
1247 * If plen does not account for pkt size
1248 */
1249 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1250 abort_connection(ep, skb, GFP_KERNEL);
1251 return;
1252 }
1253 ep->plen = (u8) plen;
1254
1255 /*
1256 * If we don't have all the pdata yet, then bail.
1257 */
1258 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1259 return;
1260
1261 /*
1262 * If we get here we have accumulated the entire mpa
1263 * start reply message including private data.
1264 */
1265 ep->mpa_attr.initiator = 0;
1266 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1267 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1268 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1269 ep->mpa_attr.version = mpa->revision;
1270 if (mpa->revision == 1)
1271 ep->tried_with_mpa_v1 = 1;
1272 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1273
1274 if (mpa->revision == 2) {
1275 ep->mpa_attr.enhanced_rdma_conn =
1276 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1277 if (ep->mpa_attr.enhanced_rdma_conn) {
1278 mpa_v2_params = (struct mpa_v2_conn_params *)
1279 (ep->mpa_pkt + sizeof(*mpa));
1280 ep->ird = ntohs(mpa_v2_params->ird) &
1281 MPA_V2_IRD_ORD_MASK;
1282 ep->ord = ntohs(mpa_v2_params->ord) &
1283 MPA_V2_IRD_ORD_MASK;
1284 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1285 if (peer2peer) {
1286 if (ntohs(mpa_v2_params->ord) &
1287 MPA_V2_RDMA_WRITE_RTR)
1288 ep->mpa_attr.p2p_type =
1289 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1290 else if (ntohs(mpa_v2_params->ord) &
1291 MPA_V2_RDMA_READ_RTR)
1292 ep->mpa_attr.p2p_type =
1293 FW_RI_INIT_P2PTYPE_READ_REQ;
1294 }
1295 }
1296 } else if (mpa->revision == 1)
1297 if (peer2peer)
1298 ep->mpa_attr.p2p_type = p2p_type;
1299
1300 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1301 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1302 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1303 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1304 ep->mpa_attr.p2p_type);
1305
1306 state_set(&ep->com, MPA_REQ_RCVD);
1307
1308 /* drive upcall */
1309 connect_request_upcall(ep);
1310 return;
1311 }
1312
1313 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1314 {
1315 struct c4iw_ep *ep;
1316 struct cpl_rx_data *hdr = cplhdr(skb);
1317 unsigned int dlen = ntohs(hdr->len);
1318 unsigned int tid = GET_TID(hdr);
1319 struct tid_info *t = dev->rdev.lldi.tids;
1320
1321 ep = lookup_tid(t, tid);
1322 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1323 skb_pull(skb, sizeof(*hdr));
1324 skb_trim(skb, dlen);
1325
1326 ep->rcv_seq += dlen;
1327 BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1328
1329 /* update RX credits */
1330 update_rx_credits(ep, dlen);
1331
1332 switch (state_read(&ep->com)) {
1333 case MPA_REQ_SENT:
1334 process_mpa_reply(ep, skb);
1335 break;
1336 case MPA_REQ_WAIT:
1337 process_mpa_request(ep, skb);
1338 break;
1339 case MPA_REP_SENT:
1340 break;
1341 default:
1342 printk(KERN_ERR MOD "%s Unexpected streaming data."
1343 " ep %p state %d tid %u\n",
1344 __func__, ep, state_read(&ep->com), ep->hwtid);
1345
1346 /*
1347 * The ep will timeout and inform the ULP of the failure.
1348 * See ep_timeout().
1349 */
1350 break;
1351 }
1352 return 0;
1353 }
1354
1355 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1356 {
1357 struct c4iw_ep *ep;
1358 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1359 int release = 0;
1360 unsigned int tid = GET_TID(rpl);
1361 struct tid_info *t = dev->rdev.lldi.tids;
1362
1363 ep = lookup_tid(t, tid);
1364 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1365 BUG_ON(!ep);
1366 mutex_lock(&ep->com.mutex);
1367 switch (ep->com.state) {
1368 case ABORTING:
1369 __state_set(&ep->com, DEAD);
1370 release = 1;
1371 break;
1372 default:
1373 printk(KERN_ERR "%s ep %p state %d\n",
1374 __func__, ep, ep->com.state);
1375 break;
1376 }
1377 mutex_unlock(&ep->com.mutex);
1378
1379 if (release)
1380 release_ep_resources(ep);
1381 return 0;
1382 }
1383
1384 /*
1385 * Return whether a failed active open has allocated a TID
1386 */
1387 static inline int act_open_has_tid(int status)
1388 {
1389 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1390 status != CPL_ERR_ARP_MISS;
1391 }
1392
1393 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1394 {
1395 struct c4iw_ep *ep;
1396 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1397 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1398 ntohl(rpl->atid_status)));
1399 struct tid_info *t = dev->rdev.lldi.tids;
1400 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
1401
1402 ep = lookup_atid(t, atid);
1403
1404 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1405 status, status2errno(status));
1406
1407 if (status == CPL_ERR_RTX_NEG_ADVICE) {
1408 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1409 atid);
1410 return 0;
1411 }
1412
1413 connect_reply_upcall(ep, status2errno(status));
1414 state_set(&ep->com, DEAD);
1415
1416 if (status && act_open_has_tid(status))
1417 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1418
1419 cxgb4_free_atid(t, atid);
1420 dst_release(ep->dst);
1421 cxgb4_l2t_release(ep->l2t);
1422 c4iw_put_ep(&ep->com);
1423
1424 return 0;
1425 }
1426
1427 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1428 {
1429 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1430 struct tid_info *t = dev->rdev.lldi.tids;
1431 unsigned int stid = GET_TID(rpl);
1432 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1433
1434 if (!ep) {
1435 printk(KERN_ERR MOD "stid %d lookup failure!\n", stid);
1436 return 0;
1437 }
1438 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1439 rpl->status, status2errno(rpl->status));
1440 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1441
1442 return 0;
1443 }
1444
1445 static int listen_stop(struct c4iw_listen_ep *ep)
1446 {
1447 struct sk_buff *skb;
1448 struct cpl_close_listsvr_req *req;
1449
1450 PDBG("%s ep %p\n", __func__, ep);
1451 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1452 if (!skb) {
1453 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
1454 return -ENOMEM;
1455 }
1456 req = (struct cpl_close_listsvr_req *) skb_put(skb, sizeof(*req));
1457 INIT_TP_WR(req, 0);
1458 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ,
1459 ep->stid));
1460 req->reply_ctrl = cpu_to_be16(
1461 QUEUENO(ep->com.dev->rdev.lldi.rxq_ids[0]));
1462 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
1463 return c4iw_ofld_send(&ep->com.dev->rdev, skb);
1464 }
1465
1466 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1467 {
1468 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1469 struct tid_info *t = dev->rdev.lldi.tids;
1470 unsigned int stid = GET_TID(rpl);
1471 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1472
1473 PDBG("%s ep %p\n", __func__, ep);
1474 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
1475 return 0;
1476 }
1477
1478 static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb,
1479 struct cpl_pass_accept_req *req)
1480 {
1481 struct cpl_pass_accept_rpl *rpl;
1482 unsigned int mtu_idx;
1483 u64 opt0;
1484 u32 opt2;
1485 int wscale;
1486
1487 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1488 BUG_ON(skb_cloned(skb));
1489 skb_trim(skb, sizeof(*rpl));
1490 skb_get(skb);
1491 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1492 wscale = compute_wscale(rcv_win);
1493 opt0 = KEEP_ALIVE(1) |
1494 DELACK(1) |
1495 WND_SCALE(wscale) |
1496 MSS_IDX(mtu_idx) |
1497 L2T_IDX(ep->l2t->idx) |
1498 TX_CHAN(ep->tx_chan) |
1499 SMAC_SEL(ep->smac_idx) |
1500 DSCP(ep->tos) |
1501 ULP_MODE(ULP_MODE_TCPDDP) |
1502 RCV_BUFSIZ(rcv_win>>10);
1503 opt2 = RX_CHANNEL(0) |
1504 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1505
1506 if (enable_tcp_timestamps && req->tcpopt.tstamp)
1507 opt2 |= TSTAMPS_EN(1);
1508 if (enable_tcp_sack && req->tcpopt.sack)
1509 opt2 |= SACK_EN(1);
1510 if (wscale && enable_tcp_window_scaling)
1511 opt2 |= WND_SCALE_EN(1);
1512
1513 rpl = cplhdr(skb);
1514 INIT_TP_WR(rpl, ep->hwtid);
1515 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1516 ep->hwtid));
1517 rpl->opt0 = cpu_to_be64(opt0);
1518 rpl->opt2 = cpu_to_be32(opt2);
1519 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
1520 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1521
1522 return;
1523 }
1524
1525 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, __be32 peer_ip,
1526 struct sk_buff *skb)
1527 {
1528 PDBG("%s c4iw_dev %p tid %u peer_ip %x\n", __func__, dev, hwtid,
1529 peer_ip);
1530 BUG_ON(skb_cloned(skb));
1531 skb_trim(skb, sizeof(struct cpl_tid_release));
1532 skb_get(skb);
1533 release_tid(&dev->rdev, hwtid, skb);
1534 return;
1535 }
1536
1537 static void get_4tuple(struct cpl_pass_accept_req *req,
1538 __be32 *local_ip, __be32 *peer_ip,
1539 __be16 *local_port, __be16 *peer_port)
1540 {
1541 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
1542 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
1543 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
1544 struct tcphdr *tcp = (struct tcphdr *)
1545 ((u8 *)(req + 1) + eth_len + ip_len);
1546
1547 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
1548 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
1549 ntohs(tcp->dest));
1550
1551 *peer_ip = ip->saddr;
1552 *local_ip = ip->daddr;
1553 *peer_port = tcp->source;
1554 *local_port = tcp->dest;
1555
1556 return;
1557 }
1558
1559 static int import_ep(struct c4iw_ep *ep, __be32 peer_ip, struct dst_entry *dst,
1560 struct c4iw_dev *cdev, bool clear_mpa_v1)
1561 {
1562 struct neighbour *n;
1563 int err, step;
1564
1565 n = dst_neigh_lookup(dst, &peer_ip);
1566 if (!n)
1567 return -ENODEV;
1568
1569 rcu_read_lock();
1570 err = -ENOMEM;
1571 if (n->dev->flags & IFF_LOOPBACK) {
1572 struct net_device *pdev;
1573
1574 pdev = ip_dev_find(&init_net, peer_ip);
1575 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1576 n, pdev, 0);
1577 if (!ep->l2t)
1578 goto out;
1579 ep->mtu = pdev->mtu;
1580 ep->tx_chan = cxgb4_port_chan(pdev);
1581 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1582 step = cdev->rdev.lldi.ntxq /
1583 cdev->rdev.lldi.nchan;
1584 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1585 step = cdev->rdev.lldi.nrxq /
1586 cdev->rdev.lldi.nchan;
1587 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1588 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1589 cxgb4_port_idx(pdev) * step];
1590 dev_put(pdev);
1591 } else {
1592 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1593 n, n->dev, 0);
1594 if (!ep->l2t)
1595 goto out;
1596 ep->mtu = dst_mtu(dst);
1597 ep->tx_chan = cxgb4_port_chan(n->dev);
1598 ep->smac_idx = (cxgb4_port_viid(n->dev) & 0x7F) << 1;
1599 step = cdev->rdev.lldi.ntxq /
1600 cdev->rdev.lldi.nchan;
1601 ep->txq_idx = cxgb4_port_idx(n->dev) * step;
1602 ep->ctrlq_idx = cxgb4_port_idx(n->dev);
1603 step = cdev->rdev.lldi.nrxq /
1604 cdev->rdev.lldi.nchan;
1605 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1606 cxgb4_port_idx(n->dev) * step];
1607
1608 if (clear_mpa_v1) {
1609 ep->retry_with_mpa_v1 = 0;
1610 ep->tried_with_mpa_v1 = 0;
1611 }
1612 }
1613 err = 0;
1614 out:
1615 rcu_read_unlock();
1616
1617 neigh_release(n);
1618
1619 return err;
1620 }
1621
1622 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
1623 {
1624 struct c4iw_ep *child_ep, *parent_ep;
1625 struct cpl_pass_accept_req *req = cplhdr(skb);
1626 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
1627 struct tid_info *t = dev->rdev.lldi.tids;
1628 unsigned int hwtid = GET_TID(req);
1629 struct dst_entry *dst;
1630 struct rtable *rt;
1631 __be32 local_ip, peer_ip;
1632 __be16 local_port, peer_port;
1633 int err;
1634
1635 parent_ep = lookup_stid(t, stid);
1636 PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
1637
1638 get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port);
1639
1640 if (state_read(&parent_ep->com) != LISTEN) {
1641 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
1642 __func__);
1643 goto reject;
1644 }
1645
1646 /* Find output route */
1647 rt = find_route(dev, local_ip, peer_ip, local_port, peer_port,
1648 GET_POPEN_TOS(ntohl(req->tos_stid)));
1649 if (!rt) {
1650 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
1651 __func__);
1652 goto reject;
1653 }
1654 dst = &rt->dst;
1655
1656 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1657 if (!child_ep) {
1658 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
1659 __func__);
1660 dst_release(dst);
1661 goto reject;
1662 }
1663
1664 err = import_ep(child_ep, peer_ip, dst, dev, false);
1665 if (err) {
1666 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
1667 __func__);
1668 dst_release(dst);
1669 kfree(child_ep);
1670 goto reject;
1671 }
1672
1673 state_set(&child_ep->com, CONNECTING);
1674 child_ep->com.dev = dev;
1675 child_ep->com.cm_id = NULL;
1676 child_ep->com.local_addr.sin_family = PF_INET;
1677 child_ep->com.local_addr.sin_port = local_port;
1678 child_ep->com.local_addr.sin_addr.s_addr = local_ip;
1679 child_ep->com.remote_addr.sin_family = PF_INET;
1680 child_ep->com.remote_addr.sin_port = peer_port;
1681 child_ep->com.remote_addr.sin_addr.s_addr = peer_ip;
1682 c4iw_get_ep(&parent_ep->com);
1683 child_ep->parent_ep = parent_ep;
1684 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
1685 child_ep->dst = dst;
1686 child_ep->hwtid = hwtid;
1687
1688 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
1689 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
1690
1691 init_timer(&child_ep->timer);
1692 cxgb4_insert_tid(t, child_ep, hwtid);
1693 accept_cr(child_ep, peer_ip, skb, req);
1694 goto out;
1695 reject:
1696 reject_cr(dev, hwtid, peer_ip, skb);
1697 out:
1698 return 0;
1699 }
1700
1701 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1702 {
1703 struct c4iw_ep *ep;
1704 struct cpl_pass_establish *req = cplhdr(skb);
1705 struct tid_info *t = dev->rdev.lldi.tids;
1706 unsigned int tid = GET_TID(req);
1707
1708 ep = lookup_tid(t, tid);
1709 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1710 ep->snd_seq = be32_to_cpu(req->snd_isn);
1711 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1712
1713 set_emss(ep, ntohs(req->tcp_opt));
1714
1715 dst_confirm(ep->dst);
1716 state_set(&ep->com, MPA_REQ_WAIT);
1717 start_ep_timer(ep);
1718 send_flowc(ep, skb);
1719
1720 return 0;
1721 }
1722
1723 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
1724 {
1725 struct cpl_peer_close *hdr = cplhdr(skb);
1726 struct c4iw_ep *ep;
1727 struct c4iw_qp_attributes attrs;
1728 int disconnect = 1;
1729 int release = 0;
1730 struct tid_info *t = dev->rdev.lldi.tids;
1731 unsigned int tid = GET_TID(hdr);
1732 int ret;
1733
1734 ep = lookup_tid(t, tid);
1735 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1736 dst_confirm(ep->dst);
1737
1738 mutex_lock(&ep->com.mutex);
1739 switch (ep->com.state) {
1740 case MPA_REQ_WAIT:
1741 __state_set(&ep->com, CLOSING);
1742 break;
1743 case MPA_REQ_SENT:
1744 __state_set(&ep->com, CLOSING);
1745 connect_reply_upcall(ep, -ECONNRESET);
1746 break;
1747 case MPA_REQ_RCVD:
1748
1749 /*
1750 * We're gonna mark this puppy DEAD, but keep
1751 * the reference on it until the ULP accepts or
1752 * rejects the CR. Also wake up anyone waiting
1753 * in rdma connection migration (see c4iw_accept_cr()).
1754 */
1755 __state_set(&ep->com, CLOSING);
1756 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1757 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1758 break;
1759 case MPA_REP_SENT:
1760 __state_set(&ep->com, CLOSING);
1761 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
1762 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1763 break;
1764 case FPDU_MODE:
1765 start_ep_timer(ep);
1766 __state_set(&ep->com, CLOSING);
1767 attrs.next_state = C4IW_QP_STATE_CLOSING;
1768 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1769 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1770 if (ret != -ECONNRESET) {
1771 peer_close_upcall(ep);
1772 disconnect = 1;
1773 }
1774 break;
1775 case ABORTING:
1776 disconnect = 0;
1777 break;
1778 case CLOSING:
1779 __state_set(&ep->com, MORIBUND);
1780 disconnect = 0;
1781 break;
1782 case MORIBUND:
1783 stop_ep_timer(ep);
1784 if (ep->com.cm_id && ep->com.qp) {
1785 attrs.next_state = C4IW_QP_STATE_IDLE;
1786 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1787 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1788 }
1789 close_complete_upcall(ep);
1790 __state_set(&ep->com, DEAD);
1791 release = 1;
1792 disconnect = 0;
1793 break;
1794 case DEAD:
1795 disconnect = 0;
1796 break;
1797 default:
1798 BUG_ON(1);
1799 }
1800 mutex_unlock(&ep->com.mutex);
1801 if (disconnect)
1802 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1803 if (release)
1804 release_ep_resources(ep);
1805 return 0;
1806 }
1807
1808 /*
1809 * Returns whether an ABORT_REQ_RSS message is a negative advice.
1810 */
1811 static int is_neg_adv_abort(unsigned int status)
1812 {
1813 return status == CPL_ERR_RTX_NEG_ADVICE ||
1814 status == CPL_ERR_PERSIST_NEG_ADVICE;
1815 }
1816
1817 static int c4iw_reconnect(struct c4iw_ep *ep)
1818 {
1819 struct rtable *rt;
1820 int err = 0;
1821
1822 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
1823 init_timer(&ep->timer);
1824
1825 /*
1826 * Allocate an active TID to initiate a TCP connection.
1827 */
1828 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
1829 if (ep->atid == -1) {
1830 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
1831 err = -ENOMEM;
1832 goto fail2;
1833 }
1834
1835 /* find a route */
1836 rt = find_route(ep->com.dev,
1837 ep->com.cm_id->local_addr.sin_addr.s_addr,
1838 ep->com.cm_id->remote_addr.sin_addr.s_addr,
1839 ep->com.cm_id->local_addr.sin_port,
1840 ep->com.cm_id->remote_addr.sin_port, 0);
1841 if (!rt) {
1842 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
1843 err = -EHOSTUNREACH;
1844 goto fail3;
1845 }
1846 ep->dst = &rt->dst;
1847
1848 err = import_ep(ep, ep->com.cm_id->remote_addr.sin_addr.s_addr,
1849 ep->dst, ep->com.dev, false);
1850 if (err) {
1851 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
1852 goto fail4;
1853 }
1854
1855 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1856 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1857 ep->l2t->idx);
1858
1859 state_set(&ep->com, CONNECTING);
1860 ep->tos = 0;
1861
1862 /* send connect request to rnic */
1863 err = send_connect(ep);
1864 if (!err)
1865 goto out;
1866
1867 cxgb4_l2t_release(ep->l2t);
1868 fail4:
1869 dst_release(ep->dst);
1870 fail3:
1871 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
1872 fail2:
1873 /*
1874 * remember to send notification to upper layer.
1875 * We are in here so the upper layer is not aware that this is
1876 * re-connect attempt and so, upper layer is still waiting for
1877 * response of 1st connect request.
1878 */
1879 connect_reply_upcall(ep, -ECONNRESET);
1880 c4iw_put_ep(&ep->com);
1881 out:
1882 return err;
1883 }
1884
1885 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
1886 {
1887 struct cpl_abort_req_rss *req = cplhdr(skb);
1888 struct c4iw_ep *ep;
1889 struct cpl_abort_rpl *rpl;
1890 struct sk_buff *rpl_skb;
1891 struct c4iw_qp_attributes attrs;
1892 int ret;
1893 int release = 0;
1894 struct tid_info *t = dev->rdev.lldi.tids;
1895 unsigned int tid = GET_TID(req);
1896
1897 ep = lookup_tid(t, tid);
1898 if (is_neg_adv_abort(req->status)) {
1899 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
1900 ep->hwtid);
1901 return 0;
1902 }
1903 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
1904 ep->com.state);
1905
1906 /*
1907 * Wake up any threads in rdma_init() or rdma_fini().
1908 * However, this is not needed if com state is just
1909 * MPA_REQ_SENT
1910 */
1911 if (ep->com.state != MPA_REQ_SENT)
1912 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1913
1914 mutex_lock(&ep->com.mutex);
1915 switch (ep->com.state) {
1916 case CONNECTING:
1917 break;
1918 case MPA_REQ_WAIT:
1919 stop_ep_timer(ep);
1920 break;
1921 case MPA_REQ_SENT:
1922 stop_ep_timer(ep);
1923 if (mpa_rev == 2 && ep->tried_with_mpa_v1)
1924 connect_reply_upcall(ep, -ECONNRESET);
1925 else {
1926 /*
1927 * we just don't send notification upwards because we
1928 * want to retry with mpa_v1 without upper layers even
1929 * knowing it.
1930 *
1931 * do some housekeeping so as to re-initiate the
1932 * connection
1933 */
1934 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
1935 mpa_rev);
1936 ep->retry_with_mpa_v1 = 1;
1937 }
1938 break;
1939 case MPA_REP_SENT:
1940 break;
1941 case MPA_REQ_RCVD:
1942 break;
1943 case MORIBUND:
1944 case CLOSING:
1945 stop_ep_timer(ep);
1946 /*FALLTHROUGH*/
1947 case FPDU_MODE:
1948 if (ep->com.cm_id && ep->com.qp) {
1949 attrs.next_state = C4IW_QP_STATE_ERROR;
1950 ret = c4iw_modify_qp(ep->com.qp->rhp,
1951 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
1952 &attrs, 1);
1953 if (ret)
1954 printk(KERN_ERR MOD
1955 "%s - qp <- error failed!\n",
1956 __func__);
1957 }
1958 peer_abort_upcall(ep);
1959 break;
1960 case ABORTING:
1961 break;
1962 case DEAD:
1963 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
1964 mutex_unlock(&ep->com.mutex);
1965 return 0;
1966 default:
1967 BUG_ON(1);
1968 break;
1969 }
1970 dst_confirm(ep->dst);
1971 if (ep->com.state != ABORTING) {
1972 __state_set(&ep->com, DEAD);
1973 /* we don't release if we want to retry with mpa_v1 */
1974 if (!ep->retry_with_mpa_v1)
1975 release = 1;
1976 }
1977 mutex_unlock(&ep->com.mutex);
1978
1979 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
1980 if (!rpl_skb) {
1981 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
1982 __func__);
1983 release = 1;
1984 goto out;
1985 }
1986 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
1987 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
1988 INIT_TP_WR(rpl, ep->hwtid);
1989 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
1990 rpl->cmd = CPL_ABORT_NO_RST;
1991 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
1992 out:
1993 if (release)
1994 release_ep_resources(ep);
1995
1996 /* retry with mpa-v1 */
1997 if (ep && ep->retry_with_mpa_v1) {
1998 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
1999 dst_release(ep->dst);
2000 cxgb4_l2t_release(ep->l2t);
2001 c4iw_reconnect(ep);
2002 }
2003
2004 return 0;
2005 }
2006
2007 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2008 {
2009 struct c4iw_ep *ep;
2010 struct c4iw_qp_attributes attrs;
2011 struct cpl_close_con_rpl *rpl = cplhdr(skb);
2012 int release = 0;
2013 struct tid_info *t = dev->rdev.lldi.tids;
2014 unsigned int tid = GET_TID(rpl);
2015
2016 ep = lookup_tid(t, tid);
2017
2018 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2019 BUG_ON(!ep);
2020
2021 /* The cm_id may be null if we failed to connect */
2022 mutex_lock(&ep->com.mutex);
2023 switch (ep->com.state) {
2024 case CLOSING:
2025 __state_set(&ep->com, MORIBUND);
2026 break;
2027 case MORIBUND:
2028 stop_ep_timer(ep);
2029 if ((ep->com.cm_id) && (ep->com.qp)) {
2030 attrs.next_state = C4IW_QP_STATE_IDLE;
2031 c4iw_modify_qp(ep->com.qp->rhp,
2032 ep->com.qp,
2033 C4IW_QP_ATTR_NEXT_STATE,
2034 &attrs, 1);
2035 }
2036 close_complete_upcall(ep);
2037 __state_set(&ep->com, DEAD);
2038 release = 1;
2039 break;
2040 case ABORTING:
2041 case DEAD:
2042 break;
2043 default:
2044 BUG_ON(1);
2045 break;
2046 }
2047 mutex_unlock(&ep->com.mutex);
2048 if (release)
2049 release_ep_resources(ep);
2050 return 0;
2051 }
2052
2053 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2054 {
2055 struct cpl_rdma_terminate *rpl = cplhdr(skb);
2056 struct tid_info *t = dev->rdev.lldi.tids;
2057 unsigned int tid = GET_TID(rpl);
2058 struct c4iw_ep *ep;
2059 struct c4iw_qp_attributes attrs;
2060
2061 ep = lookup_tid(t, tid);
2062 BUG_ON(!ep);
2063
2064 if (ep && ep->com.qp) {
2065 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2066 ep->com.qp->wq.sq.qid);
2067 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2068 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2069 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2070 } else
2071 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2072
2073 return 0;
2074 }
2075
2076 /*
2077 * Upcall from the adapter indicating data has been transmitted.
2078 * For us its just the single MPA request or reply. We can now free
2079 * the skb holding the mpa message.
2080 */
2081 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2082 {
2083 struct c4iw_ep *ep;
2084 struct cpl_fw4_ack *hdr = cplhdr(skb);
2085 u8 credits = hdr->credits;
2086 unsigned int tid = GET_TID(hdr);
2087 struct tid_info *t = dev->rdev.lldi.tids;
2088
2089
2090 ep = lookup_tid(t, tid);
2091 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
2092 if (credits == 0) {
2093 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
2094 __func__, ep, ep->hwtid, state_read(&ep->com));
2095 return 0;
2096 }
2097
2098 dst_confirm(ep->dst);
2099 if (ep->mpa_skb) {
2100 PDBG("%s last streaming msg ack ep %p tid %u state %u "
2101 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
2102 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
2103 kfree_skb(ep->mpa_skb);
2104 ep->mpa_skb = NULL;
2105 }
2106 return 0;
2107 }
2108
2109 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2110 {
2111 int err;
2112 struct c4iw_ep *ep = to_ep(cm_id);
2113 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2114
2115 if (state_read(&ep->com) == DEAD) {
2116 c4iw_put_ep(&ep->com);
2117 return -ECONNRESET;
2118 }
2119 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
2120 if (mpa_rev == 0)
2121 abort_connection(ep, NULL, GFP_KERNEL);
2122 else {
2123 err = send_mpa_reject(ep, pdata, pdata_len);
2124 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2125 }
2126 c4iw_put_ep(&ep->com);
2127 return 0;
2128 }
2129
2130 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2131 {
2132 int err;
2133 struct c4iw_qp_attributes attrs;
2134 enum c4iw_qp_attr_mask mask;
2135 struct c4iw_ep *ep = to_ep(cm_id);
2136 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2137 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2138
2139 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2140 if (state_read(&ep->com) == DEAD) {
2141 err = -ECONNRESET;
2142 goto err;
2143 }
2144
2145 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
2146 BUG_ON(!qp);
2147
2148 if ((conn_param->ord > c4iw_max_read_depth) ||
2149 (conn_param->ird > c4iw_max_read_depth)) {
2150 abort_connection(ep, NULL, GFP_KERNEL);
2151 err = -EINVAL;
2152 goto err;
2153 }
2154
2155 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2156 if (conn_param->ord > ep->ird) {
2157 ep->ird = conn_param->ird;
2158 ep->ord = conn_param->ord;
2159 send_mpa_reject(ep, conn_param->private_data,
2160 conn_param->private_data_len);
2161 abort_connection(ep, NULL, GFP_KERNEL);
2162 err = -ENOMEM;
2163 goto err;
2164 }
2165 if (conn_param->ird > ep->ord) {
2166 if (!ep->ord)
2167 conn_param->ird = 1;
2168 else {
2169 abort_connection(ep, NULL, GFP_KERNEL);
2170 err = -ENOMEM;
2171 goto err;
2172 }
2173 }
2174
2175 }
2176 ep->ird = conn_param->ird;
2177 ep->ord = conn_param->ord;
2178
2179 if (ep->mpa_attr.version != 2)
2180 if (peer2peer && ep->ird == 0)
2181 ep->ird = 1;
2182
2183 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
2184
2185 cm_id->add_ref(cm_id);
2186 ep->com.cm_id = cm_id;
2187 ep->com.qp = qp;
2188
2189 /* bind QP to EP and move to RTS */
2190 attrs.mpa_attr = ep->mpa_attr;
2191 attrs.max_ird = ep->ird;
2192 attrs.max_ord = ep->ord;
2193 attrs.llp_stream_handle = ep;
2194 attrs.next_state = C4IW_QP_STATE_RTS;
2195
2196 /* bind QP and TID with INIT_WR */
2197 mask = C4IW_QP_ATTR_NEXT_STATE |
2198 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2199 C4IW_QP_ATTR_MPA_ATTR |
2200 C4IW_QP_ATTR_MAX_IRD |
2201 C4IW_QP_ATTR_MAX_ORD;
2202
2203 err = c4iw_modify_qp(ep->com.qp->rhp,
2204 ep->com.qp, mask, &attrs, 1);
2205 if (err)
2206 goto err1;
2207 err = send_mpa_reply(ep, conn_param->private_data,
2208 conn_param->private_data_len);
2209 if (err)
2210 goto err1;
2211
2212 state_set(&ep->com, FPDU_MODE);
2213 established_upcall(ep);
2214 c4iw_put_ep(&ep->com);
2215 return 0;
2216 err1:
2217 ep->com.cm_id = NULL;
2218 ep->com.qp = NULL;
2219 cm_id->rem_ref(cm_id);
2220 err:
2221 c4iw_put_ep(&ep->com);
2222 return err;
2223 }
2224
2225 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2226 {
2227 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2228 struct c4iw_ep *ep;
2229 struct rtable *rt;
2230 int err = 0;
2231
2232 if ((conn_param->ord > c4iw_max_read_depth) ||
2233 (conn_param->ird > c4iw_max_read_depth)) {
2234 err = -EINVAL;
2235 goto out;
2236 }
2237 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2238 if (!ep) {
2239 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2240 err = -ENOMEM;
2241 goto out;
2242 }
2243 init_timer(&ep->timer);
2244 ep->plen = conn_param->private_data_len;
2245 if (ep->plen)
2246 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
2247 conn_param->private_data, ep->plen);
2248 ep->ird = conn_param->ird;
2249 ep->ord = conn_param->ord;
2250
2251 if (peer2peer && ep->ord == 0)
2252 ep->ord = 1;
2253
2254 cm_id->add_ref(cm_id);
2255 ep->com.dev = dev;
2256 ep->com.cm_id = cm_id;
2257 ep->com.qp = get_qhp(dev, conn_param->qpn);
2258 BUG_ON(!ep->com.qp);
2259 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
2260 ep->com.qp, cm_id);
2261
2262 /*
2263 * Allocate an active TID to initiate a TCP connection.
2264 */
2265 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
2266 if (ep->atid == -1) {
2267 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
2268 err = -ENOMEM;
2269 goto fail2;
2270 }
2271
2272 PDBG("%s saddr 0x%x sport 0x%x raddr 0x%x rport 0x%x\n", __func__,
2273 ntohl(cm_id->local_addr.sin_addr.s_addr),
2274 ntohs(cm_id->local_addr.sin_port),
2275 ntohl(cm_id->remote_addr.sin_addr.s_addr),
2276 ntohs(cm_id->remote_addr.sin_port));
2277
2278 /* find a route */
2279 rt = find_route(dev,
2280 cm_id->local_addr.sin_addr.s_addr,
2281 cm_id->remote_addr.sin_addr.s_addr,
2282 cm_id->local_addr.sin_port,
2283 cm_id->remote_addr.sin_port, 0);
2284 if (!rt) {
2285 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
2286 err = -EHOSTUNREACH;
2287 goto fail3;
2288 }
2289 ep->dst = &rt->dst;
2290
2291 err = import_ep(ep, cm_id->remote_addr.sin_addr.s_addr,
2292 ep->dst, ep->com.dev, true);
2293 if (err) {
2294 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
2295 goto fail4;
2296 }
2297
2298 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2299 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2300 ep->l2t->idx);
2301
2302 state_set(&ep->com, CONNECTING);
2303 ep->tos = 0;
2304 ep->com.local_addr = cm_id->local_addr;
2305 ep->com.remote_addr = cm_id->remote_addr;
2306
2307 /* send connect request to rnic */
2308 err = send_connect(ep);
2309 if (!err)
2310 goto out;
2311
2312 cxgb4_l2t_release(ep->l2t);
2313 fail4:
2314 dst_release(ep->dst);
2315 fail3:
2316 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2317 fail2:
2318 cm_id->rem_ref(cm_id);
2319 c4iw_put_ep(&ep->com);
2320 out:
2321 return err;
2322 }
2323
2324 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2325 {
2326 int err = 0;
2327 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2328 struct c4iw_listen_ep *ep;
2329
2330
2331 might_sleep();
2332
2333 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2334 if (!ep) {
2335 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2336 err = -ENOMEM;
2337 goto fail1;
2338 }
2339 PDBG("%s ep %p\n", __func__, ep);
2340 cm_id->add_ref(cm_id);
2341 ep->com.cm_id = cm_id;
2342 ep->com.dev = dev;
2343 ep->backlog = backlog;
2344 ep->com.local_addr = cm_id->local_addr;
2345
2346 /*
2347 * Allocate a server TID.
2348 */
2349 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep);
2350 if (ep->stid == -1) {
2351 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
2352 err = -ENOMEM;
2353 goto fail2;
2354 }
2355
2356 state_set(&ep->com, LISTEN);
2357 c4iw_init_wr_wait(&ep->com.wr_wait);
2358 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], ep->stid,
2359 ep->com.local_addr.sin_addr.s_addr,
2360 ep->com.local_addr.sin_port,
2361 ep->com.dev->rdev.lldi.rxq_ids[0]);
2362 if (err)
2363 goto fail3;
2364
2365 /* wait for pass_open_rpl */
2366 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2367 __func__);
2368 if (!err) {
2369 cm_id->provider_data = ep;
2370 goto out;
2371 }
2372 fail3:
2373 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2374 fail2:
2375 cm_id->rem_ref(cm_id);
2376 c4iw_put_ep(&ep->com);
2377 fail1:
2378 out:
2379 return err;
2380 }
2381
2382 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2383 {
2384 int err;
2385 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2386
2387 PDBG("%s ep %p\n", __func__, ep);
2388
2389 might_sleep();
2390 state_set(&ep->com, DEAD);
2391 c4iw_init_wr_wait(&ep->com.wr_wait);
2392 err = listen_stop(ep);
2393 if (err)
2394 goto done;
2395 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0,
2396 __func__);
2397 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
2398 done:
2399 cm_id->rem_ref(cm_id);
2400 c4iw_put_ep(&ep->com);
2401 return err;
2402 }
2403
2404 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2405 {
2406 int ret = 0;
2407 int close = 0;
2408 int fatal = 0;
2409 struct c4iw_rdev *rdev;
2410
2411 mutex_lock(&ep->com.mutex);
2412
2413 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
2414 states[ep->com.state], abrupt);
2415
2416 rdev = &ep->com.dev->rdev;
2417 if (c4iw_fatal_error(rdev)) {
2418 fatal = 1;
2419 close_complete_upcall(ep);
2420 ep->com.state = DEAD;
2421 }
2422 switch (ep->com.state) {
2423 case MPA_REQ_WAIT:
2424 case MPA_REQ_SENT:
2425 case MPA_REQ_RCVD:
2426 case MPA_REP_SENT:
2427 case FPDU_MODE:
2428 close = 1;
2429 if (abrupt)
2430 ep->com.state = ABORTING;
2431 else {
2432 ep->com.state = CLOSING;
2433 start_ep_timer(ep);
2434 }
2435 set_bit(CLOSE_SENT, &ep->com.flags);
2436 break;
2437 case CLOSING:
2438 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2439 close = 1;
2440 if (abrupt) {
2441 stop_ep_timer(ep);
2442 ep->com.state = ABORTING;
2443 } else
2444 ep->com.state = MORIBUND;
2445 }
2446 break;
2447 case MORIBUND:
2448 case ABORTING:
2449 case DEAD:
2450 PDBG("%s ignoring disconnect ep %p state %u\n",
2451 __func__, ep, ep->com.state);
2452 break;
2453 default:
2454 BUG();
2455 break;
2456 }
2457
2458 if (close) {
2459 if (abrupt) {
2460 close_complete_upcall(ep);
2461 ret = send_abort(ep, NULL, gfp);
2462 } else
2463 ret = send_halfclose(ep, gfp);
2464 if (ret)
2465 fatal = 1;
2466 }
2467 mutex_unlock(&ep->com.mutex);
2468 if (fatal)
2469 release_ep_resources(ep);
2470 return ret;
2471 }
2472
2473 static int async_event(struct c4iw_dev *dev, struct sk_buff *skb)
2474 {
2475 struct cpl_fw6_msg *rpl = cplhdr(skb);
2476 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
2477 return 0;
2478 }
2479
2480 /*
2481 * These are the real handlers that are called from a
2482 * work queue.
2483 */
2484 static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
2485 [CPL_ACT_ESTABLISH] = act_establish,
2486 [CPL_ACT_OPEN_RPL] = act_open_rpl,
2487 [CPL_RX_DATA] = rx_data,
2488 [CPL_ABORT_RPL_RSS] = abort_rpl,
2489 [CPL_ABORT_RPL] = abort_rpl,
2490 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
2491 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
2492 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
2493 [CPL_PASS_ESTABLISH] = pass_establish,
2494 [CPL_PEER_CLOSE] = peer_close,
2495 [CPL_ABORT_REQ_RSS] = peer_abort,
2496 [CPL_CLOSE_CON_RPL] = close_con_rpl,
2497 [CPL_RDMA_TERMINATE] = terminate,
2498 [CPL_FW4_ACK] = fw4_ack,
2499 [CPL_FW6_MSG] = async_event
2500 };
2501
2502 static void process_timeout(struct c4iw_ep *ep)
2503 {
2504 struct c4iw_qp_attributes attrs;
2505 int abort = 1;
2506
2507 mutex_lock(&ep->com.mutex);
2508 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
2509 ep->com.state);
2510 switch (ep->com.state) {
2511 case MPA_REQ_SENT:
2512 __state_set(&ep->com, ABORTING);
2513 connect_reply_upcall(ep, -ETIMEDOUT);
2514 break;
2515 case MPA_REQ_WAIT:
2516 __state_set(&ep->com, ABORTING);
2517 break;
2518 case CLOSING:
2519 case MORIBUND:
2520 if (ep->com.cm_id && ep->com.qp) {
2521 attrs.next_state = C4IW_QP_STATE_ERROR;
2522 c4iw_modify_qp(ep->com.qp->rhp,
2523 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2524 &attrs, 1);
2525 }
2526 __state_set(&ep->com, ABORTING);
2527 break;
2528 default:
2529 printk(KERN_ERR "%s unexpected state ep %p tid %u state %u\n",
2530 __func__, ep, ep->hwtid, ep->com.state);
2531 WARN_ON(1);
2532 abort = 0;
2533 }
2534 mutex_unlock(&ep->com.mutex);
2535 if (abort)
2536 abort_connection(ep, NULL, GFP_KERNEL);
2537 c4iw_put_ep(&ep->com);
2538 }
2539
2540 static void process_timedout_eps(void)
2541 {
2542 struct c4iw_ep *ep;
2543
2544 spin_lock_irq(&timeout_lock);
2545 while (!list_empty(&timeout_list)) {
2546 struct list_head *tmp;
2547
2548 tmp = timeout_list.next;
2549 list_del(tmp);
2550 spin_unlock_irq(&timeout_lock);
2551 ep = list_entry(tmp, struct c4iw_ep, entry);
2552 process_timeout(ep);
2553 spin_lock_irq(&timeout_lock);
2554 }
2555 spin_unlock_irq(&timeout_lock);
2556 }
2557
2558 static void process_work(struct work_struct *work)
2559 {
2560 struct sk_buff *skb = NULL;
2561 struct c4iw_dev *dev;
2562 struct cpl_act_establish *rpl;
2563 unsigned int opcode;
2564 int ret;
2565
2566 while ((skb = skb_dequeue(&rxq))) {
2567 rpl = cplhdr(skb);
2568 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
2569 opcode = rpl->ot.opcode;
2570
2571 BUG_ON(!work_handlers[opcode]);
2572 ret = work_handlers[opcode](dev, skb);
2573 if (!ret)
2574 kfree_skb(skb);
2575 }
2576 process_timedout_eps();
2577 }
2578
2579 static DECLARE_WORK(skb_work, process_work);
2580
2581 static void ep_timeout(unsigned long arg)
2582 {
2583 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
2584
2585 spin_lock(&timeout_lock);
2586 list_add_tail(&ep->entry, &timeout_list);
2587 spin_unlock(&timeout_lock);
2588 queue_work(workq, &skb_work);
2589 }
2590
2591 /*
2592 * All the CM events are handled on a work queue to have a safe context.
2593 */
2594 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
2595 {
2596
2597 /*
2598 * Save dev in the skb->cb area.
2599 */
2600 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
2601
2602 /*
2603 * Queue the skb and schedule the worker thread.
2604 */
2605 skb_queue_tail(&rxq, skb);
2606 queue_work(workq, &skb_work);
2607 return 0;
2608 }
2609
2610 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2611 {
2612 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
2613
2614 if (rpl->status != CPL_ERR_NONE) {
2615 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
2616 "for tid %u\n", rpl->status, GET_TID(rpl));
2617 }
2618 kfree_skb(skb);
2619 return 0;
2620 }
2621
2622 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2623 {
2624 struct cpl_fw6_msg *rpl = cplhdr(skb);
2625 struct c4iw_wr_wait *wr_waitp;
2626 int ret;
2627
2628 PDBG("%s type %u\n", __func__, rpl->type);
2629
2630 switch (rpl->type) {
2631 case 1:
2632 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
2633 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
2634 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
2635 if (wr_waitp)
2636 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
2637 kfree_skb(skb);
2638 break;
2639 case 2:
2640 sched(dev, skb);
2641 break;
2642 default:
2643 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
2644 rpl->type);
2645 kfree_skb(skb);
2646 break;
2647 }
2648 return 0;
2649 }
2650
2651 static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
2652 {
2653 struct cpl_abort_req_rss *req = cplhdr(skb);
2654 struct c4iw_ep *ep;
2655 struct tid_info *t = dev->rdev.lldi.tids;
2656 unsigned int tid = GET_TID(req);
2657
2658 ep = lookup_tid(t, tid);
2659 if (!ep) {
2660 printk(KERN_WARNING MOD
2661 "Abort on non-existent endpoint, tid %d\n", tid);
2662 kfree_skb(skb);
2663 return 0;
2664 }
2665 if (is_neg_adv_abort(req->status)) {
2666 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
2667 ep->hwtid);
2668 kfree_skb(skb);
2669 return 0;
2670 }
2671 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2672 ep->com.state);
2673
2674 /*
2675 * Wake up any threads in rdma_init() or rdma_fini().
2676 */
2677 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2678 sched(dev, skb);
2679 return 0;
2680 }
2681
2682 /*
2683 * Most upcalls from the T4 Core go to sched() to
2684 * schedule the processing on a work queue.
2685 */
2686 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
2687 [CPL_ACT_ESTABLISH] = sched,
2688 [CPL_ACT_OPEN_RPL] = sched,
2689 [CPL_RX_DATA] = sched,
2690 [CPL_ABORT_RPL_RSS] = sched,
2691 [CPL_ABORT_RPL] = sched,
2692 [CPL_PASS_OPEN_RPL] = sched,
2693 [CPL_CLOSE_LISTSRV_RPL] = sched,
2694 [CPL_PASS_ACCEPT_REQ] = sched,
2695 [CPL_PASS_ESTABLISH] = sched,
2696 [CPL_PEER_CLOSE] = sched,
2697 [CPL_CLOSE_CON_RPL] = sched,
2698 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
2699 [CPL_RDMA_TERMINATE] = sched,
2700 [CPL_FW4_ACK] = sched,
2701 [CPL_SET_TCB_RPL] = set_tcb_rpl,
2702 [CPL_FW6_MSG] = fw6_msg
2703 };
2704
2705 int __init c4iw_cm_init(void)
2706 {
2707 spin_lock_init(&timeout_lock);
2708 skb_queue_head_init(&rxq);
2709
2710 workq = create_singlethread_workqueue("iw_cxgb4");
2711 if (!workq)
2712 return -ENOMEM;
2713
2714 return 0;
2715 }
2716
2717 void __exit c4iw_cm_term(void)
2718 {
2719 WARN_ON(!list_empty(&timeout_list));
2720 flush_workqueue(workq);
2721 destroy_workqueue(workq);
2722 }
Linux with added FPC-III support