1 /*
2 * Copyright (c) 2009-2014 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 #include <linux/if_vlan.h>
42
43 #include <net/neighbour.h>
44 #include <net/netevent.h>
45 #include <net/route.h>
46 #include <net/tcp.h>
47 #include <net/ip6_route.h>
48 #include <net/addrconf.h>
49
50 #include <rdma/ib_addr.h>
51
52 #include "iw_cxgb4.h"
53
54 static char *states[] = {
55 "idle",
56 "listen",
57 "connecting",
58 "mpa_wait_req",
59 "mpa_req_sent",
60 "mpa_req_rcvd",
61 "mpa_rep_sent",
62 "fpdu_mode",
63 "aborting",
64 "closing",
65 "moribund",
66 "dead",
67 NULL,
68 };
69
70 static int nocong;
71 module_param(nocong, int, 0644);
72 MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
73
74 static int enable_ecn;
75 module_param(enable_ecn, int, 0644);
76 MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
77
78 static int dack_mode = 1;
79 module_param(dack_mode, int, 0644);
80 MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
81
82 uint c4iw_max_read_depth = 32;
83 module_param(c4iw_max_read_depth, int, 0644);
84 MODULE_PARM_DESC(c4iw_max_read_depth,
85 "Per-connection max ORD/IRD (default=32)");
86
87 static int enable_tcp_timestamps;
88 module_param(enable_tcp_timestamps, int, 0644);
89 MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
90
91 static int enable_tcp_sack;
92 module_param(enable_tcp_sack, int, 0644);
93 MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
94
95 static int enable_tcp_window_scaling = 1;
96 module_param(enable_tcp_window_scaling, int, 0644);
97 MODULE_PARM_DESC(enable_tcp_window_scaling,
98 "Enable tcp window scaling (default=1)");
99
100 int c4iw_debug;
101 module_param(c4iw_debug, int, 0644);
102 MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
103
104 static int peer2peer = 1;
105 module_param(peer2peer, int, 0644);
106 MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
107
108 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
109 module_param(p2p_type, int, 0644);
110 MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
111 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
112
113 static int ep_timeout_secs = 60;
114 module_param(ep_timeout_secs, int, 0644);
115 MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
116 "in seconds (default=60)");
117
118 static int mpa_rev = 1;
119 module_param(mpa_rev, int, 0644);
120 MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
121 "1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft"
122 " compliant (default=1)");
123
124 static int markers_enabled;
125 module_param(markers_enabled, int, 0644);
126 MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
127
128 static int crc_enabled = 1;
129 module_param(crc_enabled, int, 0644);
130 MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
131
132 static int rcv_win = 256 * 1024;
133 module_param(rcv_win, int, 0644);
134 MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
135
136 static int snd_win = 128 * 1024;
137 module_param(snd_win, int, 0644);
138 MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
139
140 static struct workqueue_struct *workq;
141
142 static struct sk_buff_head rxq;
143
144 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
145 static void ep_timeout(unsigned long arg);
146 static void connect_reply_upcall(struct c4iw_ep *ep, int status);
147
148 static LIST_HEAD(timeout_list);
149 static spinlock_t timeout_lock;
150
deref_qp(struct c4iw_ep * ep)151 static void deref_qp(struct c4iw_ep *ep)
152 {
153 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
154 clear_bit(QP_REFERENCED, &ep->com.flags);
155 }
156
ref_qp(struct c4iw_ep * ep)157 static void ref_qp(struct c4iw_ep *ep)
158 {
159 set_bit(QP_REFERENCED, &ep->com.flags);
160 c4iw_qp_add_ref(&ep->com.qp->ibqp);
161 }
162
start_ep_timer(struct c4iw_ep * ep)163 static void start_ep_timer(struct c4iw_ep *ep)
164 {
165 PDBG("%s ep %p\n", __func__, ep);
166 if (timer_pending(&ep->timer)) {
167 pr_err("%s timer already started! ep %p\n",
168 __func__, ep);
169 return;
170 }
171 clear_bit(TIMEOUT, &ep->com.flags);
172 c4iw_get_ep(&ep->com);
173 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
174 ep->timer.data = (unsigned long)ep;
175 ep->timer.function = ep_timeout;
176 add_timer(&ep->timer);
177 }
178
stop_ep_timer(struct c4iw_ep * ep)179 static int stop_ep_timer(struct c4iw_ep *ep)
180 {
181 PDBG("%s ep %p stopping\n", __func__, ep);
182 del_timer_sync(&ep->timer);
183 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
184 c4iw_put_ep(&ep->com);
185 return 0;
186 }
187 return 1;
188 }
189
c4iw_l2t_send(struct c4iw_rdev * rdev,struct sk_buff * skb,struct l2t_entry * l2e)190 static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
191 struct l2t_entry *l2e)
192 {
193 int error = 0;
194
195 if (c4iw_fatal_error(rdev)) {
196 kfree_skb(skb);
197 PDBG("%s - device in error state - dropping\n", __func__);
198 return -EIO;
199 }
200 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
201 if (error < 0)
202 kfree_skb(skb);
203 return error < 0 ? error : 0;
204 }
205
c4iw_ofld_send(struct c4iw_rdev * rdev,struct sk_buff * skb)206 int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
207 {
208 int error = 0;
209
210 if (c4iw_fatal_error(rdev)) {
211 kfree_skb(skb);
212 PDBG("%s - device in error state - dropping\n", __func__);
213 return -EIO;
214 }
215 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
216 if (error < 0)
217 kfree_skb(skb);
218 return error < 0 ? error : 0;
219 }
220
release_tid(struct c4iw_rdev * rdev,u32 hwtid,struct sk_buff * skb)221 static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
222 {
223 struct cpl_tid_release *req;
224
225 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
226 if (!skb)
227 return;
228 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
229 INIT_TP_WR(req, hwtid);
230 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
231 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
232 c4iw_ofld_send(rdev, skb);
233 return;
234 }
235
set_emss(struct c4iw_ep * ep,u16 opt)236 static void set_emss(struct c4iw_ep *ep, u16 opt)
237 {
238 ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] -
239 ((AF_INET == ep->com.remote_addr.ss_family) ?
240 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
241 sizeof(struct tcphdr);
242 ep->mss = ep->emss;
243 if (GET_TCPOPT_TSTAMP(opt))
244 ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
245 if (ep->emss < 128)
246 ep->emss = 128;
247 if (ep->emss & 7)
248 PDBG("Warning: misaligned mtu idx %u mss %u emss=%u\n",
249 GET_TCPOPT_MSS(opt), ep->mss, ep->emss);
250 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
251 ep->mss, ep->emss);
252 }
253
state_read(struct c4iw_ep_common * epc)254 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
255 {
256 enum c4iw_ep_state state;
257
258 mutex_lock(&epc->mutex);
259 state = epc->state;
260 mutex_unlock(&epc->mutex);
261 return state;
262 }
263
__state_set(struct c4iw_ep_common * epc,enum c4iw_ep_state new)264 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
265 {
266 epc->state = new;
267 }
268
state_set(struct c4iw_ep_common * epc,enum c4iw_ep_state new)269 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
270 {
271 mutex_lock(&epc->mutex);
272 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
273 __state_set(epc, new);
274 mutex_unlock(&epc->mutex);
275 return;
276 }
277
alloc_ep(int size,gfp_t gfp)278 static void *alloc_ep(int size, gfp_t gfp)
279 {
280 struct c4iw_ep_common *epc;
281
282 epc = kzalloc(size, gfp);
283 if (epc) {
284 kref_init(&epc->kref);
285 mutex_init(&epc->mutex);
286 c4iw_init_wr_wait(&epc->wr_wait);
287 }
288 PDBG("%s alloc ep %p\n", __func__, epc);
289 return epc;
290 }
291
_c4iw_free_ep(struct kref * kref)292 void _c4iw_free_ep(struct kref *kref)
293 {
294 struct c4iw_ep *ep;
295
296 ep = container_of(kref, struct c4iw_ep, com.kref);
297 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
298 if (test_bit(QP_REFERENCED, &ep->com.flags))
299 deref_qp(ep);
300 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
301 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
302 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
303 dst_release(ep->dst);
304 cxgb4_l2t_release(ep->l2t);
305 }
306 if (test_bit(RELEASE_MAPINFO, &ep->com.flags)) {
307 print_addr(&ep->com, __func__, "remove_mapinfo/mapping");
308 iwpm_remove_mapinfo(&ep->com.local_addr,
309 &ep->com.mapped_local_addr);
310 iwpm_remove_mapping(&ep->com.local_addr, RDMA_NL_C4IW);
311 }
312 kfree(ep);
313 }
314
release_ep_resources(struct c4iw_ep * ep)315 static void release_ep_resources(struct c4iw_ep *ep)
316 {
317 set_bit(RELEASE_RESOURCES, &ep->com.flags);
318 c4iw_put_ep(&ep->com);
319 }
320
status2errno(int status)321 static int status2errno(int status)
322 {
323 switch (status) {
324 case CPL_ERR_NONE:
325 return 0;
326 case CPL_ERR_CONN_RESET:
327 return -ECONNRESET;
328 case CPL_ERR_ARP_MISS:
329 return -EHOSTUNREACH;
330 case CPL_ERR_CONN_TIMEDOUT:
331 return -ETIMEDOUT;
332 case CPL_ERR_TCAM_FULL:
333 return -ENOMEM;
334 case CPL_ERR_CONN_EXIST:
335 return -EADDRINUSE;
336 default:
337 return -EIO;
338 }
339 }
340
341 /*
342 * Try and reuse skbs already allocated...
343 */
get_skb(struct sk_buff * skb,int len,gfp_t gfp)344 static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
345 {
346 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
347 skb_trim(skb, 0);
348 skb_get(skb);
349 skb_reset_transport_header(skb);
350 } else {
351 skb = alloc_skb(len, gfp);
352 }
353 t4_set_arp_err_handler(skb, NULL, NULL);
354 return skb;
355 }
356
get_real_dev(struct net_device * egress_dev)357 static struct net_device *get_real_dev(struct net_device *egress_dev)
358 {
359 return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
360 }
361
our_interface(struct c4iw_dev * dev,struct net_device * egress_dev)362 static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
363 {
364 int i;
365
366 egress_dev = get_real_dev(egress_dev);
367 for (i = 0; i < dev->rdev.lldi.nports; i++)
368 if (dev->rdev.lldi.ports[i] == egress_dev)
369 return 1;
370 return 0;
371 }
372
find_route6(struct c4iw_dev * dev,__u8 * local_ip,__u8 * peer_ip,__be16 local_port,__be16 peer_port,u8 tos,__u32 sin6_scope_id)373 static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
374 __u8 *peer_ip, __be16 local_port,
375 __be16 peer_port, u8 tos,
376 __u32 sin6_scope_id)
377 {
378 struct dst_entry *dst = NULL;
379
380 if (IS_ENABLED(CONFIG_IPV6)) {
381 struct flowi6 fl6;
382
383 memset(&fl6, 0, sizeof(fl6));
384 memcpy(&fl6.daddr, peer_ip, 16);
385 memcpy(&fl6.saddr, local_ip, 16);
386 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
387 fl6.flowi6_oif = sin6_scope_id;
388 dst = ip6_route_output(&init_net, NULL, &fl6);
389 if (!dst)
390 goto out;
391 if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
392 !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
393 dst_release(dst);
394 dst = NULL;
395 }
396 }
397
398 out:
399 return dst;
400 }
401
find_route(struct c4iw_dev * dev,__be32 local_ip,__be32 peer_ip,__be16 local_port,__be16 peer_port,u8 tos)402 static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip,
403 __be32 peer_ip, __be16 local_port,
404 __be16 peer_port, u8 tos)
405 {
406 struct rtable *rt;
407 struct flowi4 fl4;
408 struct neighbour *n;
409
410 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
411 peer_port, local_port, IPPROTO_TCP,
412 tos, 0);
413 if (IS_ERR(rt))
414 return NULL;
415 n = dst_neigh_lookup(&rt->dst, &peer_ip);
416 if (!n)
417 return NULL;
418 if (!our_interface(dev, n->dev) &&
419 !(n->dev->flags & IFF_LOOPBACK)) {
420 neigh_release(n);
421 dst_release(&rt->dst);
422 return NULL;
423 }
424 neigh_release(n);
425 return &rt->dst;
426 }
427
arp_failure_discard(void * handle,struct sk_buff * skb)428 static void arp_failure_discard(void *handle, struct sk_buff *skb)
429 {
430 PDBG("%s c4iw_dev %p\n", __func__, handle);
431 kfree_skb(skb);
432 }
433
434 /*
435 * Handle an ARP failure for an active open.
436 */
act_open_req_arp_failure(void * handle,struct sk_buff * skb)437 static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
438 {
439 struct c4iw_ep *ep = handle;
440
441 printk(KERN_ERR MOD "ARP failure duing connect\n");
442 kfree_skb(skb);
443 connect_reply_upcall(ep, -EHOSTUNREACH);
444 state_set(&ep->com, DEAD);
445 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
446 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
447 dst_release(ep->dst);
448 cxgb4_l2t_release(ep->l2t);
449 c4iw_put_ep(&ep->com);
450 }
451
452 /*
453 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
454 * and send it along.
455 */
abort_arp_failure(void * handle,struct sk_buff * skb)456 static void abort_arp_failure(void *handle, struct sk_buff *skb)
457 {
458 struct c4iw_rdev *rdev = handle;
459 struct cpl_abort_req *req = cplhdr(skb);
460
461 PDBG("%s rdev %p\n", __func__, rdev);
462 req->cmd = CPL_ABORT_NO_RST;
463 c4iw_ofld_send(rdev, skb);
464 }
465
send_flowc(struct c4iw_ep * ep,struct sk_buff * skb)466 static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
467 {
468 unsigned int flowclen = 80;
469 struct fw_flowc_wr *flowc;
470 int i;
471
472 skb = get_skb(skb, flowclen, GFP_KERNEL);
473 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
474
475 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
476 FW_FLOWC_WR_NPARAMS(8));
477 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
478 16)) | FW_WR_FLOWID(ep->hwtid));
479
480 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
481 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN
482 (ep->com.dev->rdev.lldi.pf));
483 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
484 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
485 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
486 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
487 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
488 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
489 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
490 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
491 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
492 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
493 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
494 flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
495 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
496 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
497 /* Pad WR to 16 byte boundary */
498 flowc->mnemval[8].mnemonic = 0;
499 flowc->mnemval[8].val = 0;
500 for (i = 0; i < 9; i++) {
501 flowc->mnemval[i].r4[0] = 0;
502 flowc->mnemval[i].r4[1] = 0;
503 flowc->mnemval[i].r4[2] = 0;
504 }
505
506 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
507 c4iw_ofld_send(&ep->com.dev->rdev, skb);
508 }
509
send_halfclose(struct c4iw_ep * ep,gfp_t gfp)510 static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
511 {
512 struct cpl_close_con_req *req;
513 struct sk_buff *skb;
514 int wrlen = roundup(sizeof *req, 16);
515
516 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
517 skb = get_skb(NULL, wrlen, gfp);
518 if (!skb) {
519 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
520 return -ENOMEM;
521 }
522 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
523 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
524 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
525 memset(req, 0, wrlen);
526 INIT_TP_WR(req, ep->hwtid);
527 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
528 ep->hwtid));
529 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
530 }
531
send_abort(struct c4iw_ep * ep,struct sk_buff * skb,gfp_t gfp)532 static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
533 {
534 struct cpl_abort_req *req;
535 int wrlen = roundup(sizeof *req, 16);
536
537 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
538 skb = get_skb(skb, wrlen, gfp);
539 if (!skb) {
540 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
541 __func__);
542 return -ENOMEM;
543 }
544 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
545 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
546 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
547 memset(req, 0, wrlen);
548 INIT_TP_WR(req, ep->hwtid);
549 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
550 req->cmd = CPL_ABORT_SEND_RST;
551 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
552 }
553
554 /*
555 * c4iw_form_pm_msg - Form a port mapper message with mapping info
556 */
c4iw_form_pm_msg(struct c4iw_ep * ep,struct iwpm_sa_data * pm_msg)557 static void c4iw_form_pm_msg(struct c4iw_ep *ep,
558 struct iwpm_sa_data *pm_msg)
559 {
560 memcpy(&pm_msg->loc_addr, &ep->com.local_addr,
561 sizeof(ep->com.local_addr));
562 memcpy(&pm_msg->rem_addr, &ep->com.remote_addr,
563 sizeof(ep->com.remote_addr));
564 }
565
566 /*
567 * c4iw_form_reg_msg - Form a port mapper message with dev info
568 */
c4iw_form_reg_msg(struct c4iw_dev * dev,struct iwpm_dev_data * pm_msg)569 static void c4iw_form_reg_msg(struct c4iw_dev *dev,
570 struct iwpm_dev_data *pm_msg)
571 {
572 memcpy(pm_msg->dev_name, dev->ibdev.name, IWPM_DEVNAME_SIZE);
573 memcpy(pm_msg->if_name, dev->rdev.lldi.ports[0]->name,
574 IWPM_IFNAME_SIZE);
575 }
576
c4iw_record_pm_msg(struct c4iw_ep * ep,struct iwpm_sa_data * pm_msg)577 static void c4iw_record_pm_msg(struct c4iw_ep *ep,
578 struct iwpm_sa_data *pm_msg)
579 {
580 memcpy(&ep->com.mapped_local_addr, &pm_msg->mapped_loc_addr,
581 sizeof(ep->com.mapped_local_addr));
582 memcpy(&ep->com.mapped_remote_addr, &pm_msg->mapped_rem_addr,
583 sizeof(ep->com.mapped_remote_addr));
584 }
585
best_mtu(const unsigned short * mtus,unsigned short mtu,unsigned int * idx,int use_ts,int ipv6)586 static void best_mtu(const unsigned short *mtus, unsigned short mtu,
587 unsigned int *idx, int use_ts, int ipv6)
588 {
589 unsigned short hdr_size = (ipv6 ?
590 sizeof(struct ipv6hdr) :
591 sizeof(struct iphdr)) +
592 sizeof(struct tcphdr) +
593 (use_ts ?
594 round_up(TCPOLEN_TIMESTAMP, 4) : 0);
595 unsigned short data_size = mtu - hdr_size;
596
597 cxgb4_best_aligned_mtu(mtus, hdr_size, data_size, 8, idx);
598 }
599
send_connect(struct c4iw_ep * ep)600 static int send_connect(struct c4iw_ep *ep)
601 {
602 struct cpl_act_open_req *req;
603 struct cpl_t5_act_open_req *t5_req;
604 struct cpl_act_open_req6 *req6;
605 struct cpl_t5_act_open_req6 *t5_req6;
606 struct sk_buff *skb;
607 u64 opt0;
608 u32 opt2;
609 unsigned int mtu_idx;
610 int wscale;
611 int wrlen;
612 int sizev4 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
613 sizeof(struct cpl_act_open_req) :
614 sizeof(struct cpl_t5_act_open_req);
615 int sizev6 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
616 sizeof(struct cpl_act_open_req6) :
617 sizeof(struct cpl_t5_act_open_req6);
618 struct sockaddr_in *la = (struct sockaddr_in *)
619 &ep->com.mapped_local_addr;
620 struct sockaddr_in *ra = (struct sockaddr_in *)
621 &ep->com.mapped_remote_addr;
622 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
623 &ep->com.mapped_local_addr;
624 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
625 &ep->com.mapped_remote_addr;
626 int win;
627
628 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
629 roundup(sizev4, 16) :
630 roundup(sizev6, 16);
631
632 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
633
634 skb = get_skb(NULL, wrlen, GFP_KERNEL);
635 if (!skb) {
636 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
637 __func__);
638 return -ENOMEM;
639 }
640 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
641
642 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
643 enable_tcp_timestamps,
644 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
645 wscale = compute_wscale(rcv_win);
646
647 /*
648 * Specify the largest window that will fit in opt0. The
649 * remainder will be specified in the rx_data_ack.
650 */
651 win = ep->rcv_win >> 10;
652 if (win > RCV_BUFSIZ_MASK)
653 win = RCV_BUFSIZ_MASK;
654
655 opt0 = (nocong ? NO_CONG(1) : 0) |
656 KEEP_ALIVE(1) |
657 DELACK(1) |
658 WND_SCALE(wscale) |
659 MSS_IDX(mtu_idx) |
660 L2T_IDX(ep->l2t->idx) |
661 TX_CHAN(ep->tx_chan) |
662 SMAC_SEL(ep->smac_idx) |
663 DSCP(ep->tos) |
664 ULP_MODE(ULP_MODE_TCPDDP) |
665 RCV_BUFSIZ(win);
666 opt2 = RX_CHANNEL(0) |
667 CCTRL_ECN(enable_ecn) |
668 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
669 if (enable_tcp_timestamps)
670 opt2 |= TSTAMPS_EN(1);
671 if (enable_tcp_sack)
672 opt2 |= SACK_EN(1);
673 if (wscale && enable_tcp_window_scaling)
674 opt2 |= WND_SCALE_EN(1);
675 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
676 opt2 |= T5_OPT_2_VALID;
677 opt2 |= V_CONG_CNTRL(CONG_ALG_TAHOE);
678 opt2 |= CONG_CNTRL_VALID; /* OPT_2_ISS for T5 */
679 }
680 t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
681
682 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
683 if (ep->com.remote_addr.ss_family == AF_INET) {
684 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
685 INIT_TP_WR(req, 0);
686 OPCODE_TID(req) = cpu_to_be32(
687 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
688 ((ep->rss_qid << 14) | ep->atid)));
689 req->local_port = la->sin_port;
690 req->peer_port = ra->sin_port;
691 req->local_ip = la->sin_addr.s_addr;
692 req->peer_ip = ra->sin_addr.s_addr;
693 req->opt0 = cpu_to_be64(opt0);
694 req->params = cpu_to_be32(cxgb4_select_ntuple(
695 ep->com.dev->rdev.lldi.ports[0],
696 ep->l2t));
697 req->opt2 = cpu_to_be32(opt2);
698 } else {
699 req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
700
701 INIT_TP_WR(req6, 0);
702 OPCODE_TID(req6) = cpu_to_be32(
703 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
704 ((ep->rss_qid<<14)|ep->atid)));
705 req6->local_port = la6->sin6_port;
706 req6->peer_port = ra6->sin6_port;
707 req6->local_ip_hi = *((__be64 *)
708 (la6->sin6_addr.s6_addr));
709 req6->local_ip_lo = *((__be64 *)
710 (la6->sin6_addr.s6_addr + 8));
711 req6->peer_ip_hi = *((__be64 *)
712 (ra6->sin6_addr.s6_addr));
713 req6->peer_ip_lo = *((__be64 *)
714 (ra6->sin6_addr.s6_addr + 8));
715 req6->opt0 = cpu_to_be64(opt0);
716 req6->params = cpu_to_be32(cxgb4_select_ntuple(
717 ep->com.dev->rdev.lldi.ports[0],
718 ep->l2t));
719 req6->opt2 = cpu_to_be32(opt2);
720 }
721 } else {
722 u32 isn = (prandom_u32() & ~7UL) - 1;
723
724 if (peer2peer)
725 isn += 4;
726
727 if (ep->com.remote_addr.ss_family == AF_INET) {
728 t5_req = (struct cpl_t5_act_open_req *)
729 skb_put(skb, wrlen);
730 INIT_TP_WR(t5_req, 0);
731 OPCODE_TID(t5_req) = cpu_to_be32(
732 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
733 ((ep->rss_qid << 14) | ep->atid)));
734 t5_req->local_port = la->sin_port;
735 t5_req->peer_port = ra->sin_port;
736 t5_req->local_ip = la->sin_addr.s_addr;
737 t5_req->peer_ip = ra->sin_addr.s_addr;
738 t5_req->opt0 = cpu_to_be64(opt0);
739 t5_req->params = cpu_to_be64(V_FILTER_TUPLE(
740 cxgb4_select_ntuple(
741 ep->com.dev->rdev.lldi.ports[0],
742 ep->l2t)));
743 t5_req->rsvd = cpu_to_be32(isn);
744 PDBG("%s snd_isn %u\n", __func__,
745 be32_to_cpu(t5_req->rsvd));
746 t5_req->opt2 = cpu_to_be32(opt2);
747 } else {
748 t5_req6 = (struct cpl_t5_act_open_req6 *)
749 skb_put(skb, wrlen);
750 INIT_TP_WR(t5_req6, 0);
751 OPCODE_TID(t5_req6) = cpu_to_be32(
752 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
753 ((ep->rss_qid<<14)|ep->atid)));
754 t5_req6->local_port = la6->sin6_port;
755 t5_req6->peer_port = ra6->sin6_port;
756 t5_req6->local_ip_hi = *((__be64 *)
757 (la6->sin6_addr.s6_addr));
758 t5_req6->local_ip_lo = *((__be64 *)
759 (la6->sin6_addr.s6_addr + 8));
760 t5_req6->peer_ip_hi = *((__be64 *)
761 (ra6->sin6_addr.s6_addr));
762 t5_req6->peer_ip_lo = *((__be64 *)
763 (ra6->sin6_addr.s6_addr + 8));
764 t5_req6->opt0 = cpu_to_be64(opt0);
765 t5_req6->params = cpu_to_be64(V_FILTER_TUPLE(
766 cxgb4_select_ntuple(
767 ep->com.dev->rdev.lldi.ports[0],
768 ep->l2t)));
769 t5_req6->rsvd = cpu_to_be32(isn);
770 PDBG("%s snd_isn %u\n", __func__,
771 be32_to_cpu(t5_req6->rsvd));
772 t5_req6->opt2 = cpu_to_be32(opt2);
773 }
774 }
775
776 set_bit(ACT_OPEN_REQ, &ep->com.history);
777 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
778 }
779
send_mpa_req(struct c4iw_ep * ep,struct sk_buff * skb,u8 mpa_rev_to_use)780 static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
781 u8 mpa_rev_to_use)
782 {
783 int mpalen, wrlen;
784 struct fw_ofld_tx_data_wr *req;
785 struct mpa_message *mpa;
786 struct mpa_v2_conn_params mpa_v2_params;
787
788 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
789
790 BUG_ON(skb_cloned(skb));
791
792 mpalen = sizeof(*mpa) + ep->plen;
793 if (mpa_rev_to_use == 2)
794 mpalen += sizeof(struct mpa_v2_conn_params);
795 wrlen = roundup(mpalen + sizeof *req, 16);
796 skb = get_skb(skb, wrlen, GFP_KERNEL);
797 if (!skb) {
798 connect_reply_upcall(ep, -ENOMEM);
799 return;
800 }
801 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
802
803 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
804 memset(req, 0, wrlen);
805 req->op_to_immdlen = cpu_to_be32(
806 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
807 FW_WR_COMPL(1) |
808 FW_WR_IMMDLEN(mpalen));
809 req->flowid_len16 = cpu_to_be32(
810 FW_WR_FLOWID(ep->hwtid) |
811 FW_WR_LEN16(wrlen >> 4));
812 req->plen = cpu_to_be32(mpalen);
813 req->tunnel_to_proxy = cpu_to_be32(
814 FW_OFLD_TX_DATA_WR_FLUSH(1) |
815 FW_OFLD_TX_DATA_WR_SHOVE(1));
816
817 mpa = (struct mpa_message *)(req + 1);
818 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
819 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
820 (markers_enabled ? MPA_MARKERS : 0) |
821 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
822 mpa->private_data_size = htons(ep->plen);
823 mpa->revision = mpa_rev_to_use;
824 if (mpa_rev_to_use == 1) {
825 ep->tried_with_mpa_v1 = 1;
826 ep->retry_with_mpa_v1 = 0;
827 }
828
829 if (mpa_rev_to_use == 2) {
830 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
831 sizeof (struct mpa_v2_conn_params));
832 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
833 ep->ord);
834 mpa_v2_params.ird = htons((u16)ep->ird);
835 mpa_v2_params.ord = htons((u16)ep->ord);
836
837 if (peer2peer) {
838 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
839 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
840 mpa_v2_params.ord |=
841 htons(MPA_V2_RDMA_WRITE_RTR);
842 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
843 mpa_v2_params.ord |=
844 htons(MPA_V2_RDMA_READ_RTR);
845 }
846 memcpy(mpa->private_data, &mpa_v2_params,
847 sizeof(struct mpa_v2_conn_params));
848
849 if (ep->plen)
850 memcpy(mpa->private_data +
851 sizeof(struct mpa_v2_conn_params),
852 ep->mpa_pkt + sizeof(*mpa), ep->plen);
853 } else
854 if (ep->plen)
855 memcpy(mpa->private_data,
856 ep->mpa_pkt + sizeof(*mpa), ep->plen);
857
858 /*
859 * Reference the mpa skb. This ensures the data area
860 * will remain in memory until the hw acks the tx.
861 * Function fw4_ack() will deref it.
862 */
863 skb_get(skb);
864 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
865 BUG_ON(ep->mpa_skb);
866 ep->mpa_skb = skb;
867 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
868 start_ep_timer(ep);
869 __state_set(&ep->com, MPA_REQ_SENT);
870 ep->mpa_attr.initiator = 1;
871 ep->snd_seq += mpalen;
872 return;
873 }
874
send_mpa_reject(struct c4iw_ep * ep,const void * pdata,u8 plen)875 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
876 {
877 int mpalen, wrlen;
878 struct fw_ofld_tx_data_wr *req;
879 struct mpa_message *mpa;
880 struct sk_buff *skb;
881 struct mpa_v2_conn_params mpa_v2_params;
882
883 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
884
885 mpalen = sizeof(*mpa) + plen;
886 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
887 mpalen += sizeof(struct mpa_v2_conn_params);
888 wrlen = roundup(mpalen + sizeof *req, 16);
889
890 skb = get_skb(NULL, wrlen, GFP_KERNEL);
891 if (!skb) {
892 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
893 return -ENOMEM;
894 }
895 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
896
897 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
898 memset(req, 0, wrlen);
899 req->op_to_immdlen = cpu_to_be32(
900 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
901 FW_WR_COMPL(1) |
902 FW_WR_IMMDLEN(mpalen));
903 req->flowid_len16 = cpu_to_be32(
904 FW_WR_FLOWID(ep->hwtid) |
905 FW_WR_LEN16(wrlen >> 4));
906 req->plen = cpu_to_be32(mpalen);
907 req->tunnel_to_proxy = cpu_to_be32(
908 FW_OFLD_TX_DATA_WR_FLUSH(1) |
909 FW_OFLD_TX_DATA_WR_SHOVE(1));
910
911 mpa = (struct mpa_message *)(req + 1);
912 memset(mpa, 0, sizeof(*mpa));
913 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
914 mpa->flags = MPA_REJECT;
915 mpa->revision = ep->mpa_attr.version;
916 mpa->private_data_size = htons(plen);
917
918 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
919 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
920 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
921 sizeof (struct mpa_v2_conn_params));
922 mpa_v2_params.ird = htons(((u16)ep->ird) |
923 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
924 0));
925 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
926 (p2p_type ==
927 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
928 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
929 FW_RI_INIT_P2PTYPE_READ_REQ ?
930 MPA_V2_RDMA_READ_RTR : 0) : 0));
931 memcpy(mpa->private_data, &mpa_v2_params,
932 sizeof(struct mpa_v2_conn_params));
933
934 if (ep->plen)
935 memcpy(mpa->private_data +
936 sizeof(struct mpa_v2_conn_params), pdata, plen);
937 } else
938 if (plen)
939 memcpy(mpa->private_data, pdata, plen);
940
941 /*
942 * Reference the mpa skb again. This ensures the data area
943 * will remain in memory until the hw acks the tx.
944 * Function fw4_ack() will deref it.
945 */
946 skb_get(skb);
947 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
948 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
949 BUG_ON(ep->mpa_skb);
950 ep->mpa_skb = skb;
951 ep->snd_seq += mpalen;
952 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
953 }
954
send_mpa_reply(struct c4iw_ep * ep,const void * pdata,u8 plen)955 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
956 {
957 int mpalen, wrlen;
958 struct fw_ofld_tx_data_wr *req;
959 struct mpa_message *mpa;
960 struct sk_buff *skb;
961 struct mpa_v2_conn_params mpa_v2_params;
962
963 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
964
965 mpalen = sizeof(*mpa) + plen;
966 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
967 mpalen += sizeof(struct mpa_v2_conn_params);
968 wrlen = roundup(mpalen + sizeof *req, 16);
969
970 skb = get_skb(NULL, wrlen, GFP_KERNEL);
971 if (!skb) {
972 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
973 return -ENOMEM;
974 }
975 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
976
977 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
978 memset(req, 0, wrlen);
979 req->op_to_immdlen = cpu_to_be32(
980 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
981 FW_WR_COMPL(1) |
982 FW_WR_IMMDLEN(mpalen));
983 req->flowid_len16 = cpu_to_be32(
984 FW_WR_FLOWID(ep->hwtid) |
985 FW_WR_LEN16(wrlen >> 4));
986 req->plen = cpu_to_be32(mpalen);
987 req->tunnel_to_proxy = cpu_to_be32(
988 FW_OFLD_TX_DATA_WR_FLUSH(1) |
989 FW_OFLD_TX_DATA_WR_SHOVE(1));
990
991 mpa = (struct mpa_message *)(req + 1);
992 memset(mpa, 0, sizeof(*mpa));
993 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
994 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
995 (markers_enabled ? MPA_MARKERS : 0);
996 mpa->revision = ep->mpa_attr.version;
997 mpa->private_data_size = htons(plen);
998
999 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1000 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
1001 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1002 sizeof (struct mpa_v2_conn_params));
1003 mpa_v2_params.ird = htons((u16)ep->ird);
1004 mpa_v2_params.ord = htons((u16)ep->ord);
1005 if (peer2peer && (ep->mpa_attr.p2p_type !=
1006 FW_RI_INIT_P2PTYPE_DISABLED)) {
1007 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1008
1009 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1010 mpa_v2_params.ord |=
1011 htons(MPA_V2_RDMA_WRITE_RTR);
1012 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1013 mpa_v2_params.ord |=
1014 htons(MPA_V2_RDMA_READ_RTR);
1015 }
1016
1017 memcpy(mpa->private_data, &mpa_v2_params,
1018 sizeof(struct mpa_v2_conn_params));
1019
1020 if (ep->plen)
1021 memcpy(mpa->private_data +
1022 sizeof(struct mpa_v2_conn_params), pdata, plen);
1023 } else
1024 if (plen)
1025 memcpy(mpa->private_data, pdata, plen);
1026
1027 /*
1028 * Reference the mpa skb. This ensures the data area
1029 * will remain in memory until the hw acks the tx.
1030 * Function fw4_ack() will deref it.
1031 */
1032 skb_get(skb);
1033 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
1034 ep->mpa_skb = skb;
1035 __state_set(&ep->com, MPA_REP_SENT);
1036 ep->snd_seq += mpalen;
1037 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1038 }
1039
act_establish(struct c4iw_dev * dev,struct sk_buff * skb)1040 static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1041 {
1042 struct c4iw_ep *ep;
1043 struct cpl_act_establish *req = cplhdr(skb);
1044 unsigned int tid = GET_TID(req);
1045 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
1046 struct tid_info *t = dev->rdev.lldi.tids;
1047
1048 ep = lookup_atid(t, atid);
1049
1050 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
1051 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
1052
1053 mutex_lock(&ep->com.mutex);
1054 dst_confirm(ep->dst);
1055
1056 /* setup the hwtid for this connection */
1057 ep->hwtid = tid;
1058 cxgb4_insert_tid(t, ep, tid);
1059 insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
1060
1061 ep->snd_seq = be32_to_cpu(req->snd_isn);
1062 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1063
1064 set_emss(ep, ntohs(req->tcp_opt));
1065
1066 /* dealloc the atid */
1067 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
1068 cxgb4_free_atid(t, atid);
1069 set_bit(ACT_ESTAB, &ep->com.history);
1070
1071 /* start MPA negotiation */
1072 send_flowc(ep, NULL);
1073 if (ep->retry_with_mpa_v1)
1074 send_mpa_req(ep, skb, 1);
1075 else
1076 send_mpa_req(ep, skb, mpa_rev);
1077 mutex_unlock(&ep->com.mutex);
1078 return 0;
1079 }
1080
close_complete_upcall(struct c4iw_ep * ep,int status)1081 static void close_complete_upcall(struct c4iw_ep *ep, int status)
1082 {
1083 struct iw_cm_event event;
1084
1085 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1086 memset(&event, 0, sizeof(event));
1087 event.event = IW_CM_EVENT_CLOSE;
1088 event.status = status;
1089 if (ep->com.cm_id) {
1090 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
1091 ep, ep->com.cm_id, ep->hwtid);
1092 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1093 ep->com.cm_id->rem_ref(ep->com.cm_id);
1094 ep->com.cm_id = NULL;
1095 set_bit(CLOSE_UPCALL, &ep->com.history);
1096 }
1097 }
1098
abort_connection(struct c4iw_ep * ep,struct sk_buff * skb,gfp_t gfp)1099 static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
1100 {
1101 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1102 __state_set(&ep->com, ABORTING);
1103 set_bit(ABORT_CONN, &ep->com.history);
1104 return send_abort(ep, skb, gfp);
1105 }
1106
peer_close_upcall(struct c4iw_ep * ep)1107 static void peer_close_upcall(struct c4iw_ep *ep)
1108 {
1109 struct iw_cm_event event;
1110
1111 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1112 memset(&event, 0, sizeof(event));
1113 event.event = IW_CM_EVENT_DISCONNECT;
1114 if (ep->com.cm_id) {
1115 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
1116 ep, ep->com.cm_id, ep->hwtid);
1117 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1118 set_bit(DISCONN_UPCALL, &ep->com.history);
1119 }
1120 }
1121
peer_abort_upcall(struct c4iw_ep * ep)1122 static void peer_abort_upcall(struct c4iw_ep *ep)
1123 {
1124 struct iw_cm_event event;
1125
1126 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1127 memset(&event, 0, sizeof(event));
1128 event.event = IW_CM_EVENT_CLOSE;
1129 event.status = -ECONNRESET;
1130 if (ep->com.cm_id) {
1131 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
1132 ep->com.cm_id, ep->hwtid);
1133 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1134 ep->com.cm_id->rem_ref(ep->com.cm_id);
1135 ep->com.cm_id = NULL;
1136 set_bit(ABORT_UPCALL, &ep->com.history);
1137 }
1138 }
1139
connect_reply_upcall(struct c4iw_ep * ep,int status)1140 static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1141 {
1142 struct iw_cm_event event;
1143
1144 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
1145 memset(&event, 0, sizeof(event));
1146 event.event = IW_CM_EVENT_CONNECT_REPLY;
1147 event.status = status;
1148 memcpy(&event.local_addr, &ep->com.local_addr,
1149 sizeof(ep->com.local_addr));
1150 memcpy(&event.remote_addr, &ep->com.remote_addr,
1151 sizeof(ep->com.remote_addr));
1152
1153 if ((status == 0) || (status == -ECONNREFUSED)) {
1154 if (!ep->tried_with_mpa_v1) {
1155 /* this means MPA_v2 is used */
1156 event.private_data_len = ep->plen -
1157 sizeof(struct mpa_v2_conn_params);
1158 event.private_data = ep->mpa_pkt +
1159 sizeof(struct mpa_message) +
1160 sizeof(struct mpa_v2_conn_params);
1161 } else {
1162 /* this means MPA_v1 is used */
1163 event.private_data_len = ep->plen;
1164 event.private_data = ep->mpa_pkt +
1165 sizeof(struct mpa_message);
1166 }
1167 }
1168
1169 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
1170 ep->hwtid, status);
1171 set_bit(CONN_RPL_UPCALL, &ep->com.history);
1172 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1173
1174 if (status < 0) {
1175 ep->com.cm_id->rem_ref(ep->com.cm_id);
1176 ep->com.cm_id = NULL;
1177 }
1178 }
1179
connect_request_upcall(struct c4iw_ep * ep)1180 static int connect_request_upcall(struct c4iw_ep *ep)
1181 {
1182 struct iw_cm_event event;
1183 int ret;
1184
1185 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1186 memset(&event, 0, sizeof(event));
1187 event.event = IW_CM_EVENT_CONNECT_REQUEST;
1188 memcpy(&event.local_addr, &ep->com.local_addr,
1189 sizeof(ep->com.local_addr));
1190 memcpy(&event.remote_addr, &ep->com.remote_addr,
1191 sizeof(ep->com.remote_addr));
1192 event.provider_data = ep;
1193 if (!ep->tried_with_mpa_v1) {
1194 /* this means MPA_v2 is used */
1195 event.ord = ep->ord;
1196 event.ird = ep->ird;
1197 event.private_data_len = ep->plen -
1198 sizeof(struct mpa_v2_conn_params);
1199 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1200 sizeof(struct mpa_v2_conn_params);
1201 } else {
1202 /* this means MPA_v1 is used. Send max supported */
1203 event.ord = cur_max_read_depth(ep->com.dev);
1204 event.ird = cur_max_read_depth(ep->com.dev);
1205 event.private_data_len = ep->plen;
1206 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1207 }
1208 c4iw_get_ep(&ep->com);
1209 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1210 &event);
1211 if (ret)
1212 c4iw_put_ep(&ep->com);
1213 set_bit(CONNREQ_UPCALL, &ep->com.history);
1214 c4iw_put_ep(&ep->parent_ep->com);
1215 return ret;
1216 }
1217
established_upcall(struct c4iw_ep * ep)1218 static void established_upcall(struct c4iw_ep *ep)
1219 {
1220 struct iw_cm_event event;
1221
1222 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1223 memset(&event, 0, sizeof(event));
1224 event.event = IW_CM_EVENT_ESTABLISHED;
1225 event.ird = ep->ird;
1226 event.ord = ep->ord;
1227 if (ep->com.cm_id) {
1228 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1229 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1230 set_bit(ESTAB_UPCALL, &ep->com.history);
1231 }
1232 }
1233
update_rx_credits(struct c4iw_ep * ep,u32 credits)1234 static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1235 {
1236 struct cpl_rx_data_ack *req;
1237 struct sk_buff *skb;
1238 int wrlen = roundup(sizeof *req, 16);
1239
1240 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1241 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1242 if (!skb) {
1243 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
1244 return 0;
1245 }
1246
1247 /*
1248 * If we couldn't specify the entire rcv window at connection setup
1249 * due to the limit in the number of bits in the RCV_BUFSIZ field,
1250 * then add the overage in to the credits returned.
1251 */
1252 if (ep->rcv_win > RCV_BUFSIZ_MASK * 1024)
1253 credits += ep->rcv_win - RCV_BUFSIZ_MASK * 1024;
1254
1255 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
1256 memset(req, 0, wrlen);
1257 INIT_TP_WR(req, ep->hwtid);
1258 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
1259 ep->hwtid));
1260 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
1261 F_RX_DACK_CHANGE |
1262 V_RX_DACK_MODE(dack_mode));
1263 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
1264 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1265 return credits;
1266 }
1267
1268 #define RELAXED_IRD_NEGOTIATION 1
1269
process_mpa_reply(struct c4iw_ep * ep,struct sk_buff * skb)1270 static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1271 {
1272 struct mpa_message *mpa;
1273 struct mpa_v2_conn_params *mpa_v2_params;
1274 u16 plen;
1275 u16 resp_ird, resp_ord;
1276 u8 rtr_mismatch = 0, insuff_ird = 0;
1277 struct c4iw_qp_attributes attrs;
1278 enum c4iw_qp_attr_mask mask;
1279 int err;
1280 int disconnect = 0;
1281
1282 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1283
1284 /*
1285 * Stop mpa timer. If it expired, then
1286 * we ignore the MPA reply. process_timeout()
1287 * will abort the connection.
1288 */
1289 if (stop_ep_timer(ep))
1290 return 0;
1291
1292 /*
1293 * If we get more than the supported amount of private data
1294 * then we must fail this connection.
1295 */
1296 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1297 err = -EINVAL;
1298 goto err;
1299 }
1300
1301 /*
1302 * copy the new data into our accumulation buffer.
1303 */
1304 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1305 skb->len);
1306 ep->mpa_pkt_len += skb->len;
1307
1308 /*
1309 * if we don't even have the mpa message, then bail.
1310 */
1311 if (ep->mpa_pkt_len < sizeof(*mpa))
1312 return 0;
1313 mpa = (struct mpa_message *) ep->mpa_pkt;
1314
1315 /* Validate MPA header. */
1316 if (mpa->revision > mpa_rev) {
1317 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1318 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1319 err = -EPROTO;
1320 goto err;
1321 }
1322 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1323 err = -EPROTO;
1324 goto err;
1325 }
1326
1327 plen = ntohs(mpa->private_data_size);
1328
1329 /*
1330 * Fail if there's too much private data.
1331 */
1332 if (plen > MPA_MAX_PRIVATE_DATA) {
1333 err = -EPROTO;
1334 goto err;
1335 }
1336
1337 /*
1338 * If plen does not account for pkt size
1339 */
1340 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1341 err = -EPROTO;
1342 goto err;
1343 }
1344
1345 ep->plen = (u8) plen;
1346
1347 /*
1348 * If we don't have all the pdata yet, then bail.
1349 * We'll continue process when more data arrives.
1350 */
1351 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1352 return 0;
1353
1354 if (mpa->flags & MPA_REJECT) {
1355 err = -ECONNREFUSED;
1356 goto err;
1357 }
1358
1359 /*
1360 * If we get here we have accumulated the entire mpa
1361 * start reply message including private data. And
1362 * the MPA header is valid.
1363 */
1364 __state_set(&ep->com, FPDU_MODE);
1365 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1366 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1367 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1368 ep->mpa_attr.version = mpa->revision;
1369 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1370
1371 if (mpa->revision == 2) {
1372 ep->mpa_attr.enhanced_rdma_conn =
1373 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1374 if (ep->mpa_attr.enhanced_rdma_conn) {
1375 mpa_v2_params = (struct mpa_v2_conn_params *)
1376 (ep->mpa_pkt + sizeof(*mpa));
1377 resp_ird = ntohs(mpa_v2_params->ird) &
1378 MPA_V2_IRD_ORD_MASK;
1379 resp_ord = ntohs(mpa_v2_params->ord) &
1380 MPA_V2_IRD_ORD_MASK;
1381 PDBG("%s responder ird %u ord %u ep ird %u ord %u\n",
1382 __func__, resp_ird, resp_ord, ep->ird, ep->ord);
1383
1384 /*
1385 * This is a double-check. Ideally, below checks are
1386 * not required since ird/ord stuff has been taken
1387 * care of in c4iw_accept_cr
1388 */
1389 if (ep->ird < resp_ord) {
1390 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
1391 ep->com.dev->rdev.lldi.max_ordird_qp)
1392 ep->ird = resp_ord;
1393 else
1394 insuff_ird = 1;
1395 } else if (ep->ird > resp_ord) {
1396 ep->ird = resp_ord;
1397 }
1398 if (ep->ord > resp_ird) {
1399 if (RELAXED_IRD_NEGOTIATION)
1400 ep->ord = resp_ird;
1401 else
1402 insuff_ird = 1;
1403 }
1404 if (insuff_ird) {
1405 err = -ENOMEM;
1406 ep->ird = resp_ord;
1407 ep->ord = resp_ird;
1408 }
1409
1410 if (ntohs(mpa_v2_params->ird) &
1411 MPA_V2_PEER2PEER_MODEL) {
1412 if (ntohs(mpa_v2_params->ord) &
1413 MPA_V2_RDMA_WRITE_RTR)
1414 ep->mpa_attr.p2p_type =
1415 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1416 else if (ntohs(mpa_v2_params->ord) &
1417 MPA_V2_RDMA_READ_RTR)
1418 ep->mpa_attr.p2p_type =
1419 FW_RI_INIT_P2PTYPE_READ_REQ;
1420 }
1421 }
1422 } else if (mpa->revision == 1)
1423 if (peer2peer)
1424 ep->mpa_attr.p2p_type = p2p_type;
1425
1426 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1427 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1428 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1429 ep->mpa_attr.recv_marker_enabled,
1430 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1431 ep->mpa_attr.p2p_type, p2p_type);
1432
1433 /*
1434 * If responder's RTR does not match with that of initiator, assign
1435 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1436 * generated when moving QP to RTS state.
1437 * A TERM message will be sent after QP has moved to RTS state
1438 */
1439 if ((ep->mpa_attr.version == 2) && peer2peer &&
1440 (ep->mpa_attr.p2p_type != p2p_type)) {
1441 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1442 rtr_mismatch = 1;
1443 }
1444
1445 attrs.mpa_attr = ep->mpa_attr;
1446 attrs.max_ird = ep->ird;
1447 attrs.max_ord = ep->ord;
1448 attrs.llp_stream_handle = ep;
1449 attrs.next_state = C4IW_QP_STATE_RTS;
1450
1451 mask = C4IW_QP_ATTR_NEXT_STATE |
1452 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1453 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1454
1455 /* bind QP and TID with INIT_WR */
1456 err = c4iw_modify_qp(ep->com.qp->rhp,
1457 ep->com.qp, mask, &attrs, 1);
1458 if (err)
1459 goto err;
1460
1461 /*
1462 * If responder's RTR requirement did not match with what initiator
1463 * supports, generate TERM message
1464 */
1465 if (rtr_mismatch) {
1466 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1467 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1468 attrs.ecode = MPA_NOMATCH_RTR;
1469 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1470 attrs.send_term = 1;
1471 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1472 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1473 err = -ENOMEM;
1474 disconnect = 1;
1475 goto out;
1476 }
1477
1478 /*
1479 * Generate TERM if initiator IRD is not sufficient for responder
1480 * provided ORD. Currently, we do the same behaviour even when
1481 * responder provided IRD is also not sufficient as regards to
1482 * initiator ORD.
1483 */
1484 if (insuff_ird) {
1485 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1486 __func__);
1487 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1488 attrs.ecode = MPA_INSUFF_IRD;
1489 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1490 attrs.send_term = 1;
1491 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1492 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1493 err = -ENOMEM;
1494 disconnect = 1;
1495 goto out;
1496 }
1497 goto out;
1498 err:
1499 __state_set(&ep->com, ABORTING);
1500 send_abort(ep, skb, GFP_KERNEL);
1501 out:
1502 connect_reply_upcall(ep, err);
1503 return disconnect;
1504 }
1505
process_mpa_request(struct c4iw_ep * ep,struct sk_buff * skb)1506 static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1507 {
1508 struct mpa_message *mpa;
1509 struct mpa_v2_conn_params *mpa_v2_params;
1510 u16 plen;
1511
1512 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1513
1514 /*
1515 * If we get more than the supported amount of private data
1516 * then we must fail this connection.
1517 */
1518 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1519 (void)stop_ep_timer(ep);
1520 abort_connection(ep, skb, GFP_KERNEL);
1521 return;
1522 }
1523
1524 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1525
1526 /*
1527 * Copy the new data into our accumulation buffer.
1528 */
1529 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1530 skb->len);
1531 ep->mpa_pkt_len += skb->len;
1532
1533 /*
1534 * If we don't even have the mpa message, then bail.
1535 * We'll continue process when more data arrives.
1536 */
1537 if (ep->mpa_pkt_len < sizeof(*mpa))
1538 return;
1539
1540 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1541 mpa = (struct mpa_message *) ep->mpa_pkt;
1542
1543 /*
1544 * Validate MPA Header.
1545 */
1546 if (mpa->revision > mpa_rev) {
1547 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1548 " Received = %d\n", __func__, mpa_rev, mpa->revision);
1549 (void)stop_ep_timer(ep);
1550 abort_connection(ep, skb, GFP_KERNEL);
1551 return;
1552 }
1553
1554 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
1555 (void)stop_ep_timer(ep);
1556 abort_connection(ep, skb, GFP_KERNEL);
1557 return;
1558 }
1559
1560 plen = ntohs(mpa->private_data_size);
1561
1562 /*
1563 * Fail if there's too much private data.
1564 */
1565 if (plen > MPA_MAX_PRIVATE_DATA) {
1566 (void)stop_ep_timer(ep);
1567 abort_connection(ep, skb, GFP_KERNEL);
1568 return;
1569 }
1570
1571 /*
1572 * If plen does not account for pkt size
1573 */
1574 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1575 (void)stop_ep_timer(ep);
1576 abort_connection(ep, skb, GFP_KERNEL);
1577 return;
1578 }
1579 ep->plen = (u8) plen;
1580
1581 /*
1582 * If we don't have all the pdata yet, then bail.
1583 */
1584 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1585 return;
1586
1587 /*
1588 * If we get here we have accumulated the entire mpa
1589 * start reply message including private data.
1590 */
1591 ep->mpa_attr.initiator = 0;
1592 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1593 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1594 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1595 ep->mpa_attr.version = mpa->revision;
1596 if (mpa->revision == 1)
1597 ep->tried_with_mpa_v1 = 1;
1598 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1599
1600 if (mpa->revision == 2) {
1601 ep->mpa_attr.enhanced_rdma_conn =
1602 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1603 if (ep->mpa_attr.enhanced_rdma_conn) {
1604 mpa_v2_params = (struct mpa_v2_conn_params *)
1605 (ep->mpa_pkt + sizeof(*mpa));
1606 ep->ird = ntohs(mpa_v2_params->ird) &
1607 MPA_V2_IRD_ORD_MASK;
1608 ep->ord = ntohs(mpa_v2_params->ord) &
1609 MPA_V2_IRD_ORD_MASK;
1610 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
1611 ep->ord);
1612 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1613 if (peer2peer) {
1614 if (ntohs(mpa_v2_params->ord) &
1615 MPA_V2_RDMA_WRITE_RTR)
1616 ep->mpa_attr.p2p_type =
1617 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1618 else if (ntohs(mpa_v2_params->ord) &
1619 MPA_V2_RDMA_READ_RTR)
1620 ep->mpa_attr.p2p_type =
1621 FW_RI_INIT_P2PTYPE_READ_REQ;
1622 }
1623 }
1624 } else if (mpa->revision == 1)
1625 if (peer2peer)
1626 ep->mpa_attr.p2p_type = p2p_type;
1627
1628 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1629 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1630 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1631 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1632 ep->mpa_attr.p2p_type);
1633
1634 /*
1635 * If the endpoint timer already expired, then we ignore
1636 * the start request. process_timeout() will abort
1637 * the connection.
1638 */
1639 if (!stop_ep_timer(ep)) {
1640 __state_set(&ep->com, MPA_REQ_RCVD);
1641
1642 /* drive upcall */
1643 mutex_lock(&ep->parent_ep->com.mutex);
1644 if (ep->parent_ep->com.state != DEAD) {
1645 if (connect_request_upcall(ep))
1646 abort_connection(ep, skb, GFP_KERNEL);
1647 } else {
1648 abort_connection(ep, skb, GFP_KERNEL);
1649 }
1650 mutex_unlock(&ep->parent_ep->com.mutex);
1651 }
1652 return;
1653 }
1654
rx_data(struct c4iw_dev * dev,struct sk_buff * skb)1655 static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1656 {
1657 struct c4iw_ep *ep;
1658 struct cpl_rx_data *hdr = cplhdr(skb);
1659 unsigned int dlen = ntohs(hdr->len);
1660 unsigned int tid = GET_TID(hdr);
1661 struct tid_info *t = dev->rdev.lldi.tids;
1662 __u8 status = hdr->status;
1663 int disconnect = 0;
1664
1665 ep = lookup_tid(t, tid);
1666 if (!ep)
1667 return 0;
1668 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1669 skb_pull(skb, sizeof(*hdr));
1670 skb_trim(skb, dlen);
1671 mutex_lock(&ep->com.mutex);
1672
1673 /* update RX credits */
1674 update_rx_credits(ep, dlen);
1675
1676 switch (ep->com.state) {
1677 case MPA_REQ_SENT:
1678 ep->rcv_seq += dlen;
1679 disconnect = process_mpa_reply(ep, skb);
1680 break;
1681 case MPA_REQ_WAIT:
1682 ep->rcv_seq += dlen;
1683 process_mpa_request(ep, skb);
1684 break;
1685 case FPDU_MODE: {
1686 struct c4iw_qp_attributes attrs;
1687 BUG_ON(!ep->com.qp);
1688 if (status)
1689 pr_err("%s Unexpected streaming data." \
1690 " qpid %u ep %p state %d tid %u status %d\n",
1691 __func__, ep->com.qp->wq.sq.qid, ep,
1692 ep->com.state, ep->hwtid, status);
1693 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1694 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1695 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1696 disconnect = 1;
1697 break;
1698 }
1699 default:
1700 break;
1701 }
1702 mutex_unlock(&ep->com.mutex);
1703 if (disconnect)
1704 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
1705 return 0;
1706 }
1707
abort_rpl(struct c4iw_dev * dev,struct sk_buff * skb)1708 static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1709 {
1710 struct c4iw_ep *ep;
1711 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
1712 int release = 0;
1713 unsigned int tid = GET_TID(rpl);
1714 struct tid_info *t = dev->rdev.lldi.tids;
1715
1716 ep = lookup_tid(t, tid);
1717 if (!ep) {
1718 printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
1719 return 0;
1720 }
1721 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1722 mutex_lock(&ep->com.mutex);
1723 switch (ep->com.state) {
1724 case ABORTING:
1725 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
1726 __state_set(&ep->com, DEAD);
1727 release = 1;
1728 break;
1729 default:
1730 printk(KERN_ERR "%s ep %p state %d\n",
1731 __func__, ep, ep->com.state);
1732 break;
1733 }
1734 mutex_unlock(&ep->com.mutex);
1735
1736 if (release)
1737 release_ep_resources(ep);
1738 return 0;
1739 }
1740
send_fw_act_open_req(struct c4iw_ep * ep,unsigned int atid)1741 static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1742 {
1743 struct sk_buff *skb;
1744 struct fw_ofld_connection_wr *req;
1745 unsigned int mtu_idx;
1746 int wscale;
1747 struct sockaddr_in *sin;
1748 int win;
1749
1750 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1751 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1752 memset(req, 0, sizeof(*req));
1753 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR));
1754 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
1755 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1756 ep->com.dev->rdev.lldi.ports[0],
1757 ep->l2t));
1758 sin = (struct sockaddr_in *)&ep->com.mapped_local_addr;
1759 req->le.lport = sin->sin_port;
1760 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1761 sin = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
1762 req->le.pport = sin->sin_port;
1763 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
1764 req->tcb.t_state_to_astid =
1765 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_SENT) |
1766 V_FW_OFLD_CONNECTION_WR_ASTID(atid));
1767 req->tcb.cplrxdataack_cplpassacceptrpl =
1768 htons(F_FW_OFLD_CONNECTION_WR_CPLRXDATAACK);
1769 req->tcb.tx_max = (__force __be32) jiffies;
1770 req->tcb.rcv_adv = htons(1);
1771 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
1772 enable_tcp_timestamps,
1773 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
1774 wscale = compute_wscale(rcv_win);
1775
1776 /*
1777 * Specify the largest window that will fit in opt0. The
1778 * remainder will be specified in the rx_data_ack.
1779 */
1780 win = ep->rcv_win >> 10;
1781 if (win > RCV_BUFSIZ_MASK)
1782 win = RCV_BUFSIZ_MASK;
1783
1784 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS(1) |
1785 (nocong ? NO_CONG(1) : 0) |
1786 KEEP_ALIVE(1) |
1787 DELACK(1) |
1788 WND_SCALE(wscale) |
1789 MSS_IDX(mtu_idx) |
1790 L2T_IDX(ep->l2t->idx) |
1791 TX_CHAN(ep->tx_chan) |
1792 SMAC_SEL(ep->smac_idx) |
1793 DSCP(ep->tos) |
1794 ULP_MODE(ULP_MODE_TCPDDP) |
1795 RCV_BUFSIZ(win));
1796 req->tcb.opt2 = (__force __be32) (PACE(1) |
1797 TX_QUEUE(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
1798 RX_CHANNEL(0) |
1799 CCTRL_ECN(enable_ecn) |
1800 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid));
1801 if (enable_tcp_timestamps)
1802 req->tcb.opt2 |= (__force __be32) TSTAMPS_EN(1);
1803 if (enable_tcp_sack)
1804 req->tcb.opt2 |= (__force __be32) SACK_EN(1);
1805 if (wscale && enable_tcp_window_scaling)
1806 req->tcb.opt2 |= (__force __be32) WND_SCALE_EN(1);
1807 req->tcb.opt0 = cpu_to_be64((__force u64) req->tcb.opt0);
1808 req->tcb.opt2 = cpu_to_be32((__force u32) req->tcb.opt2);
1809 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
1810 set_bit(ACT_OFLD_CONN, &ep->com.history);
1811 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1812 }
1813
1814 /*
1815 * Return whether a failed active open has allocated a TID
1816 */
act_open_has_tid(int status)1817 static inline int act_open_has_tid(int status)
1818 {
1819 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1820 status != CPL_ERR_ARP_MISS;
1821 }
1822
1823 /* Returns whether a CPL status conveys negative advice.
1824 */
is_neg_adv(unsigned int status)1825 static int is_neg_adv(unsigned int status)
1826 {
1827 return status == CPL_ERR_RTX_NEG_ADVICE ||
1828 status == CPL_ERR_PERSIST_NEG_ADVICE ||
1829 status == CPL_ERR_KEEPALV_NEG_ADVICE;
1830 }
1831
neg_adv_str(unsigned int status)1832 static char *neg_adv_str(unsigned int status)
1833 {
1834 switch (status) {
1835 case CPL_ERR_RTX_NEG_ADVICE:
1836 return "Retransmit timeout";
1837 case CPL_ERR_PERSIST_NEG_ADVICE:
1838 return "Persist timeout";
1839 case CPL_ERR_KEEPALV_NEG_ADVICE:
1840 return "Keepalive timeout";
1841 default:
1842 return "Unknown";
1843 }
1844 }
1845
set_tcp_window(struct c4iw_ep * ep,struct port_info * pi)1846 static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
1847 {
1848 ep->snd_win = snd_win;
1849 ep->rcv_win = rcv_win;
1850 PDBG("%s snd_win %d rcv_win %d\n", __func__, ep->snd_win, ep->rcv_win);
1851 }
1852
1853 #define ACT_OPEN_RETRY_COUNT 2
1854
import_ep(struct c4iw_ep * ep,int iptype,__u8 * peer_ip,struct dst_entry * dst,struct c4iw_dev * cdev,bool clear_mpa_v1)1855 static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
1856 struct dst_entry *dst, struct c4iw_dev *cdev,
1857 bool clear_mpa_v1)
1858 {
1859 struct neighbour *n;
1860 int err, step;
1861 struct net_device *pdev;
1862
1863 n = dst_neigh_lookup(dst, peer_ip);
1864 if (!n)
1865 return -ENODEV;
1866
1867 rcu_read_lock();
1868 err = -ENOMEM;
1869 if (n->dev->flags & IFF_LOOPBACK) {
1870 if (iptype == 4)
1871 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
1872 else if (IS_ENABLED(CONFIG_IPV6))
1873 for_each_netdev(&init_net, pdev) {
1874 if (ipv6_chk_addr(&init_net,
1875 (struct in6_addr *)peer_ip,
1876 pdev, 1))
1877 break;
1878 }
1879 else
1880 pdev = NULL;
1881
1882 if (!pdev) {
1883 err = -ENODEV;
1884 goto out;
1885 }
1886 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1887 n, pdev, 0);
1888 if (!ep->l2t)
1889 goto out;
1890 ep->mtu = pdev->mtu;
1891 ep->tx_chan = cxgb4_port_chan(pdev);
1892 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1893 step = cdev->rdev.lldi.ntxq /
1894 cdev->rdev.lldi.nchan;
1895 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1896 step = cdev->rdev.lldi.nrxq /
1897 cdev->rdev.lldi.nchan;
1898 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1899 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1900 cxgb4_port_idx(pdev) * step];
1901 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
1902 dev_put(pdev);
1903 } else {
1904 pdev = get_real_dev(n->dev);
1905 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1906 n, pdev, 0);
1907 if (!ep->l2t)
1908 goto out;
1909 ep->mtu = dst_mtu(dst);
1910 ep->tx_chan = cxgb4_port_chan(pdev);
1911 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1912 step = cdev->rdev.lldi.ntxq /
1913 cdev->rdev.lldi.nchan;
1914 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1915 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1916 step = cdev->rdev.lldi.nrxq /
1917 cdev->rdev.lldi.nchan;
1918 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1919 cxgb4_port_idx(pdev) * step];
1920 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
1921
1922 if (clear_mpa_v1) {
1923 ep->retry_with_mpa_v1 = 0;
1924 ep->tried_with_mpa_v1 = 0;
1925 }
1926 }
1927 err = 0;
1928 out:
1929 rcu_read_unlock();
1930
1931 neigh_release(n);
1932
1933 return err;
1934 }
1935
c4iw_reconnect(struct c4iw_ep * ep)1936 static int c4iw_reconnect(struct c4iw_ep *ep)
1937 {
1938 int err = 0;
1939 struct sockaddr_in *laddr = (struct sockaddr_in *)
1940 &ep->com.cm_id->local_addr;
1941 struct sockaddr_in *raddr = (struct sockaddr_in *)
1942 &ep->com.cm_id->remote_addr;
1943 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
1944 &ep->com.cm_id->local_addr;
1945 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
1946 &ep->com.cm_id->remote_addr;
1947 int iptype;
1948 __u8 *ra;
1949
1950 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
1951 init_timer(&ep->timer);
1952
1953 /*
1954 * Allocate an active TID to initiate a TCP connection.
1955 */
1956 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
1957 if (ep->atid == -1) {
1958 pr_err("%s - cannot alloc atid.\n", __func__);
1959 err = -ENOMEM;
1960 goto fail2;
1961 }
1962 insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
1963
1964 /* find a route */
1965 if (ep->com.cm_id->local_addr.ss_family == AF_INET) {
1966 ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
1967 raddr->sin_addr.s_addr, laddr->sin_port,
1968 raddr->sin_port, 0);
1969 iptype = 4;
1970 ra = (__u8 *)&raddr->sin_addr;
1971 } else {
1972 ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
1973 raddr6->sin6_addr.s6_addr,
1974 laddr6->sin6_port, raddr6->sin6_port, 0,
1975 raddr6->sin6_scope_id);
1976 iptype = 6;
1977 ra = (__u8 *)&raddr6->sin6_addr;
1978 }
1979 if (!ep->dst) {
1980 pr_err("%s - cannot find route.\n", __func__);
1981 err = -EHOSTUNREACH;
1982 goto fail3;
1983 }
1984 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false);
1985 if (err) {
1986 pr_err("%s - cannot alloc l2e.\n", __func__);
1987 goto fail4;
1988 }
1989
1990 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1991 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1992 ep->l2t->idx);
1993
1994 state_set(&ep->com, CONNECTING);
1995 ep->tos = 0;
1996
1997 /* send connect request to rnic */
1998 err = send_connect(ep);
1999 if (!err)
2000 goto out;
2001
2002 cxgb4_l2t_release(ep->l2t);
2003 fail4:
2004 dst_release(ep->dst);
2005 fail3:
2006 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
2007 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2008 fail2:
2009 /*
2010 * remember to send notification to upper layer.
2011 * We are in here so the upper layer is not aware that this is
2012 * re-connect attempt and so, upper layer is still waiting for
2013 * response of 1st connect request.
2014 */
2015 connect_reply_upcall(ep, -ECONNRESET);
2016 c4iw_put_ep(&ep->com);
2017 out:
2018 return err;
2019 }
2020
act_open_rpl(struct c4iw_dev * dev,struct sk_buff * skb)2021 static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2022 {
2023 struct c4iw_ep *ep;
2024 struct cpl_act_open_rpl *rpl = cplhdr(skb);
2025 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
2026 ntohl(rpl->atid_status)));
2027 struct tid_info *t = dev->rdev.lldi.tids;
2028 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
2029 struct sockaddr_in *la;
2030 struct sockaddr_in *ra;
2031 struct sockaddr_in6 *la6;
2032 struct sockaddr_in6 *ra6;
2033
2034 ep = lookup_atid(t, atid);
2035 la = (struct sockaddr_in *)&ep->com.mapped_local_addr;
2036 ra = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
2037 la6 = (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
2038 ra6 = (struct sockaddr_in6 *)&ep->com.mapped_remote_addr;
2039
2040 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
2041 status, status2errno(status));
2042
2043 if (is_neg_adv(status)) {
2044 dev_warn(&dev->rdev.lldi.pdev->dev,
2045 "Connection problems for atid %u status %u (%s)\n",
2046 atid, status, neg_adv_str(status));
2047 return 0;
2048 }
2049
2050 set_bit(ACT_OPEN_RPL, &ep->com.history);
2051
2052 /*
2053 * Log interesting failures.
2054 */
2055 switch (status) {
2056 case CPL_ERR_CONN_RESET:
2057 case CPL_ERR_CONN_TIMEDOUT:
2058 break;
2059 case CPL_ERR_TCAM_FULL:
2060 mutex_lock(&dev->rdev.stats.lock);
2061 dev->rdev.stats.tcam_full++;
2062 mutex_unlock(&dev->rdev.stats.lock);
2063 if (ep->com.local_addr.ss_family == AF_INET &&
2064 dev->rdev.lldi.enable_fw_ofld_conn) {
2065 send_fw_act_open_req(ep,
2066 GET_TID_TID(GET_AOPEN_ATID(
2067 ntohl(rpl->atid_status))));
2068 return 0;
2069 }
2070 break;
2071 case CPL_ERR_CONN_EXIST:
2072 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
2073 set_bit(ACT_RETRY_INUSE, &ep->com.history);
2074 remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
2075 atid);
2076 cxgb4_free_atid(t, atid);
2077 dst_release(ep->dst);
2078 cxgb4_l2t_release(ep->l2t);
2079 c4iw_reconnect(ep);
2080 return 0;
2081 }
2082 break;
2083 default:
2084 if (ep->com.local_addr.ss_family == AF_INET) {
2085 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
2086 atid, status, status2errno(status),
2087 &la->sin_addr.s_addr, ntohs(la->sin_port),
2088 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
2089 } else {
2090 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
2091 atid, status, status2errno(status),
2092 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
2093 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
2094 }
2095 break;
2096 }
2097
2098 connect_reply_upcall(ep, status2errno(status));
2099 state_set(&ep->com, DEAD);
2100
2101 if (status && act_open_has_tid(status))
2102 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
2103
2104 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
2105 cxgb4_free_atid(t, atid);
2106 dst_release(ep->dst);
2107 cxgb4_l2t_release(ep->l2t);
2108 c4iw_put_ep(&ep->com);
2109
2110 return 0;
2111 }
2112
pass_open_rpl(struct c4iw_dev * dev,struct sk_buff * skb)2113 static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2114 {
2115 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
2116 struct tid_info *t = dev->rdev.lldi.tids;
2117 unsigned int stid = GET_TID(rpl);
2118 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
2119
2120 if (!ep) {
2121 PDBG("%s stid %d lookup failure!\n", __func__, stid);
2122 goto out;
2123 }
2124 PDBG("%s ep %p status %d error %d\n", __func__, ep,
2125 rpl->status, status2errno(rpl->status));
2126 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2127
2128 out:
2129 return 0;
2130 }
2131
close_listsrv_rpl(struct c4iw_dev * dev,struct sk_buff * skb)2132 static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2133 {
2134 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
2135 struct tid_info *t = dev->rdev.lldi.tids;
2136 unsigned int stid = GET_TID(rpl);
2137 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
2138
2139 PDBG("%s ep %p\n", __func__, ep);
2140 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
2141 return 0;
2142 }
2143
accept_cr(struct c4iw_ep * ep,struct sk_buff * skb,struct cpl_pass_accept_req * req)2144 static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
2145 struct cpl_pass_accept_req *req)
2146 {
2147 struct cpl_pass_accept_rpl *rpl;
2148 unsigned int mtu_idx;
2149 u64 opt0;
2150 u32 opt2;
2151 int wscale;
2152 struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
2153 int win;
2154
2155 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2156 BUG_ON(skb_cloned(skb));
2157
2158 skb_get(skb);
2159 rpl = cplhdr(skb);
2160 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
2161 skb_trim(skb, roundup(sizeof(*rpl5), 16));
2162 rpl5 = (void *)rpl;
2163 INIT_TP_WR(rpl5, ep->hwtid);
2164 } else {
2165 skb_trim(skb, sizeof(*rpl));
2166 INIT_TP_WR(rpl, ep->hwtid);
2167 }
2168 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
2169 ep->hwtid));
2170
2171 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
2172 enable_tcp_timestamps && req->tcpopt.tstamp,
2173 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
2174 wscale = compute_wscale(rcv_win);
2175
2176 /*
2177 * Specify the largest window that will fit in opt0. The
2178 * remainder will be specified in the rx_data_ack.
2179 */
2180 win = ep->rcv_win >> 10;
2181 if (win > RCV_BUFSIZ_MASK)
2182 win = RCV_BUFSIZ_MASK;
2183 opt0 = (nocong ? NO_CONG(1) : 0) |
2184 KEEP_ALIVE(1) |
2185 DELACK(1) |
2186 WND_SCALE(wscale) |
2187 MSS_IDX(mtu_idx) |
2188 L2T_IDX(ep->l2t->idx) |
2189 TX_CHAN(ep->tx_chan) |
2190 SMAC_SEL(ep->smac_idx) |
2191 DSCP(ep->tos >> 2) |
2192 ULP_MODE(ULP_MODE_TCPDDP) |
2193 RCV_BUFSIZ(win);
2194 opt2 = RX_CHANNEL(0) |
2195 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
2196
2197 if (enable_tcp_timestamps && req->tcpopt.tstamp)
2198 opt2 |= TSTAMPS_EN(1);
2199 if (enable_tcp_sack && req->tcpopt.sack)
2200 opt2 |= SACK_EN(1);
2201 if (wscale && enable_tcp_window_scaling)
2202 opt2 |= WND_SCALE_EN(1);
2203 if (enable_ecn) {
2204 const struct tcphdr *tcph;
2205 u32 hlen = ntohl(req->hdr_len);
2206
2207 tcph = (const void *)(req + 1) + G_ETH_HDR_LEN(hlen) +
2208 G_IP_HDR_LEN(hlen);
2209 if (tcph->ece && tcph->cwr)
2210 opt2 |= CCTRL_ECN(1);
2211 }
2212 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
2213 u32 isn = (prandom_u32() & ~7UL) - 1;
2214 opt2 |= T5_OPT_2_VALID;
2215 opt2 |= V_CONG_CNTRL(CONG_ALG_TAHOE);
2216 opt2 |= CONG_CNTRL_VALID; /* OPT_2_ISS for T5 */
2217 rpl5 = (void *)rpl;
2218 memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16));
2219 if (peer2peer)
2220 isn += 4;
2221 rpl5->iss = cpu_to_be32(isn);
2222 PDBG("%s iss %u\n", __func__, be32_to_cpu(rpl5->iss));
2223 }
2224
2225 rpl->opt0 = cpu_to_be64(opt0);
2226 rpl->opt2 = cpu_to_be32(opt2);
2227 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
2228 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
2229 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2230
2231 return;
2232 }
2233
reject_cr(struct c4iw_dev * dev,u32 hwtid,struct sk_buff * skb)2234 static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
2235 {
2236 PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
2237 BUG_ON(skb_cloned(skb));
2238 skb_trim(skb, sizeof(struct cpl_tid_release));
2239 release_tid(&dev->rdev, hwtid, skb);
2240 return;
2241 }
2242
get_4tuple(struct cpl_pass_accept_req * req,int * iptype,__u8 * local_ip,__u8 * peer_ip,__be16 * local_port,__be16 * peer_port)2243 static void get_4tuple(struct cpl_pass_accept_req *req, int *iptype,
2244 __u8 *local_ip, __u8 *peer_ip,
2245 __be16 *local_port, __be16 *peer_port)
2246 {
2247 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
2248 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
2249 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
2250 struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
2251 struct tcphdr *tcp = (struct tcphdr *)
2252 ((u8 *)(req + 1) + eth_len + ip_len);
2253
2254 if (ip->version == 4) {
2255 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
2256 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
2257 ntohs(tcp->dest));
2258 *iptype = 4;
2259 memcpy(peer_ip, &ip->saddr, 4);
2260 memcpy(local_ip, &ip->daddr, 4);
2261 } else {
2262 PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
2263 ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
2264 ntohs(tcp->dest));
2265 *iptype = 6;
2266 memcpy(peer_ip, ip6->saddr.s6_addr, 16);
2267 memcpy(local_ip, ip6->daddr.s6_addr, 16);
2268 }
2269 *peer_port = tcp->source;
2270 *local_port = tcp->dest;
2271
2272 return;
2273 }
2274
pass_accept_req(struct c4iw_dev * dev,struct sk_buff * skb)2275 static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2276 {
2277 struct c4iw_ep *child_ep = NULL, *parent_ep;
2278 struct cpl_pass_accept_req *req = cplhdr(skb);
2279 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
2280 struct tid_info *t = dev->rdev.lldi.tids;
2281 unsigned int hwtid = GET_TID(req);
2282 struct dst_entry *dst;
2283 __u8 local_ip[16], peer_ip[16];
2284 __be16 local_port, peer_port;
2285 int err;
2286 u16 peer_mss = ntohs(req->tcpopt.mss);
2287 int iptype;
2288 unsigned short hdrs;
2289
2290 parent_ep = lookup_stid(t, stid);
2291 if (!parent_ep) {
2292 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
2293 goto reject;
2294 }
2295
2296 if (state_read(&parent_ep->com) != LISTEN) {
2297 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
2298 __func__);
2299 goto reject;
2300 }
2301
2302 get_4tuple(req, &iptype, local_ip, peer_ip, &local_port, &peer_port);
2303
2304 /* Find output route */
2305 if (iptype == 4) {
2306 PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2307 , __func__, parent_ep, hwtid,
2308 local_ip, peer_ip, ntohs(local_port),
2309 ntohs(peer_port), peer_mss);
2310 dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
2311 local_port, peer_port,
2312 GET_POPEN_TOS(ntohl(req->tos_stid)));
2313 } else {
2314 PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2315 , __func__, parent_ep, hwtid,
2316 local_ip, peer_ip, ntohs(local_port),
2317 ntohs(peer_port), peer_mss);
2318 dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
2319 PASS_OPEN_TOS(ntohl(req->tos_stid)),
2320 ((struct sockaddr_in6 *)
2321 &parent_ep->com.local_addr)->sin6_scope_id);
2322 }
2323 if (!dst) {
2324 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
2325 __func__);
2326 goto reject;
2327 }
2328
2329 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2330 if (!child_ep) {
2331 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
2332 __func__);
2333 dst_release(dst);
2334 goto reject;
2335 }
2336
2337 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false);
2338 if (err) {
2339 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
2340 __func__);
2341 dst_release(dst);
2342 kfree(child_ep);
2343 goto reject;
2344 }
2345
2346 hdrs = sizeof(struct iphdr) + sizeof(struct tcphdr) +
2347 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
2348 if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
2349 child_ep->mtu = peer_mss + hdrs;
2350
2351 state_set(&child_ep->com, CONNECTING);
2352 child_ep->com.dev = dev;
2353 child_ep->com.cm_id = NULL;
2354 if (iptype == 4) {
2355 struct sockaddr_in *sin = (struct sockaddr_in *)
2356 &child_ep->com.local_addr;
2357 sin->sin_family = PF_INET;
2358 sin->sin_port = local_port;
2359 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2360 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
2361 sin->sin_family = PF_INET;
2362 sin->sin_port = peer_port;
2363 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2364 } else {
2365 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
2366 &child_ep->com.local_addr;
2367 sin6->sin6_family = PF_INET6;
2368 sin6->sin6_port = local_port;
2369 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2370 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
2371 sin6->sin6_family = PF_INET6;
2372 sin6->sin6_port = peer_port;
2373 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2374 }
2375 c4iw_get_ep(&parent_ep->com);
2376 child_ep->parent_ep = parent_ep;
2377 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
2378 child_ep->dst = dst;
2379 child_ep->hwtid = hwtid;
2380
2381 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
2382 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
2383
2384 init_timer(&child_ep->timer);
2385 cxgb4_insert_tid(t, child_ep, hwtid);
2386 insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
2387 accept_cr(child_ep, skb, req);
2388 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
2389 goto out;
2390 reject:
2391 reject_cr(dev, hwtid, skb);
2392 out:
2393 return 0;
2394 }
2395
pass_establish(struct c4iw_dev * dev,struct sk_buff * skb)2396 static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2397 {
2398 struct c4iw_ep *ep;
2399 struct cpl_pass_establish *req = cplhdr(skb);
2400 struct tid_info *t = dev->rdev.lldi.tids;
2401 unsigned int tid = GET_TID(req);
2402
2403 ep = lookup_tid(t, tid);
2404 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2405 ep->snd_seq = be32_to_cpu(req->snd_isn);
2406 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2407
2408 PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
2409 ntohs(req->tcp_opt));
2410
2411 set_emss(ep, ntohs(req->tcp_opt));
2412
2413 dst_confirm(ep->dst);
2414 state_set(&ep->com, MPA_REQ_WAIT);
2415 start_ep_timer(ep);
2416 send_flowc(ep, skb);
2417 set_bit(PASS_ESTAB, &ep->com.history);
2418
2419 return 0;
2420 }
2421
peer_close(struct c4iw_dev * dev,struct sk_buff * skb)2422 static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2423 {
2424 struct cpl_peer_close *hdr = cplhdr(skb);
2425 struct c4iw_ep *ep;
2426 struct c4iw_qp_attributes attrs;
2427 int disconnect = 1;
2428 int release = 0;
2429 struct tid_info *t = dev->rdev.lldi.tids;
2430 unsigned int tid = GET_TID(hdr);
2431 int ret;
2432
2433 ep = lookup_tid(t, tid);
2434 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2435 dst_confirm(ep->dst);
2436
2437 set_bit(PEER_CLOSE, &ep->com.history);
2438 mutex_lock(&ep->com.mutex);
2439 switch (ep->com.state) {
2440 case MPA_REQ_WAIT:
2441 __state_set(&ep->com, CLOSING);
2442 break;
2443 case MPA_REQ_SENT:
2444 __state_set(&ep->com, CLOSING);
2445 connect_reply_upcall(ep, -ECONNRESET);
2446 break;
2447 case MPA_REQ_RCVD:
2448
2449 /*
2450 * We're gonna mark this puppy DEAD, but keep
2451 * the reference on it until the ULP accepts or
2452 * rejects the CR. Also wake up anyone waiting
2453 * in rdma connection migration (see c4iw_accept_cr()).
2454 */
2455 __state_set(&ep->com, CLOSING);
2456 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2457 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2458 break;
2459 case MPA_REP_SENT:
2460 __state_set(&ep->com, CLOSING);
2461 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
2462 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2463 break;
2464 case FPDU_MODE:
2465 start_ep_timer(ep);
2466 __state_set(&ep->com, CLOSING);
2467 attrs.next_state = C4IW_QP_STATE_CLOSING;
2468 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2469 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2470 if (ret != -ECONNRESET) {
2471 peer_close_upcall(ep);
2472 disconnect = 1;
2473 }
2474 break;
2475 case ABORTING:
2476 disconnect = 0;
2477 break;
2478 case CLOSING:
2479 __state_set(&ep->com, MORIBUND);
2480 disconnect = 0;
2481 break;
2482 case MORIBUND:
2483 (void)stop_ep_timer(ep);
2484 if (ep->com.cm_id && ep->com.qp) {
2485 attrs.next_state = C4IW_QP_STATE_IDLE;
2486 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2487 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2488 }
2489 close_complete_upcall(ep, 0);
2490 __state_set(&ep->com, DEAD);
2491 release = 1;
2492 disconnect = 0;
2493 break;
2494 case DEAD:
2495 disconnect = 0;
2496 break;
2497 default:
2498 BUG_ON(1);
2499 }
2500 mutex_unlock(&ep->com.mutex);
2501 if (disconnect)
2502 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2503 if (release)
2504 release_ep_resources(ep);
2505 return 0;
2506 }
2507
peer_abort(struct c4iw_dev * dev,struct sk_buff * skb)2508 static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2509 {
2510 struct cpl_abort_req_rss *req = cplhdr(skb);
2511 struct c4iw_ep *ep;
2512 struct cpl_abort_rpl *rpl;
2513 struct sk_buff *rpl_skb;
2514 struct c4iw_qp_attributes attrs;
2515 int ret;
2516 int release = 0;
2517 struct tid_info *t = dev->rdev.lldi.tids;
2518 unsigned int tid = GET_TID(req);
2519
2520 ep = lookup_tid(t, tid);
2521 if (is_neg_adv(req->status)) {
2522 dev_warn(&dev->rdev.lldi.pdev->dev,
2523 "Negative advice on abort - tid %u status %d (%s)\n",
2524 ep->hwtid, req->status, neg_adv_str(req->status));
2525 return 0;
2526 }
2527 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2528 ep->com.state);
2529 set_bit(PEER_ABORT, &ep->com.history);
2530
2531 /*
2532 * Wake up any threads in rdma_init() or rdma_fini().
2533 * However, this is not needed if com state is just
2534 * MPA_REQ_SENT
2535 */
2536 if (ep->com.state != MPA_REQ_SENT)
2537 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2538
2539 mutex_lock(&ep->com.mutex);
2540 switch (ep->com.state) {
2541 case CONNECTING:
2542 break;
2543 case MPA_REQ_WAIT:
2544 (void)stop_ep_timer(ep);
2545 break;
2546 case MPA_REQ_SENT:
2547 (void)stop_ep_timer(ep);
2548 if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
2549 connect_reply_upcall(ep, -ECONNRESET);
2550 else {
2551 /*
2552 * we just don't send notification upwards because we
2553 * want to retry with mpa_v1 without upper layers even
2554 * knowing it.
2555 *
2556 * do some housekeeping so as to re-initiate the
2557 * connection
2558 */
2559 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
2560 mpa_rev);
2561 ep->retry_with_mpa_v1 = 1;
2562 }
2563 break;
2564 case MPA_REP_SENT:
2565 break;
2566 case MPA_REQ_RCVD:
2567 break;
2568 case MORIBUND:
2569 case CLOSING:
2570 stop_ep_timer(ep);
2571 /*FALLTHROUGH*/
2572 case FPDU_MODE:
2573 if (ep->com.cm_id && ep->com.qp) {
2574 attrs.next_state = C4IW_QP_STATE_ERROR;
2575 ret = c4iw_modify_qp(ep->com.qp->rhp,
2576 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2577 &attrs, 1);
2578 if (ret)
2579 printk(KERN_ERR MOD
2580 "%s - qp <- error failed!\n",
2581 __func__);
2582 }
2583 peer_abort_upcall(ep);
2584 break;
2585 case ABORTING:
2586 break;
2587 case DEAD:
2588 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2589 mutex_unlock(&ep->com.mutex);
2590 return 0;
2591 default:
2592 BUG_ON(1);
2593 break;
2594 }
2595 dst_confirm(ep->dst);
2596 if (ep->com.state != ABORTING) {
2597 __state_set(&ep->com, DEAD);
2598 /* we don't release if we want to retry with mpa_v1 */
2599 if (!ep->retry_with_mpa_v1)
2600 release = 1;
2601 }
2602 mutex_unlock(&ep->com.mutex);
2603
2604 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2605 if (!rpl_skb) {
2606 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
2607 __func__);
2608 release = 1;
2609 goto out;
2610 }
2611 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2612 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2613 INIT_TP_WR(rpl, ep->hwtid);
2614 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2615 rpl->cmd = CPL_ABORT_NO_RST;
2616 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2617 out:
2618 if (release)
2619 release_ep_resources(ep);
2620 else if (ep->retry_with_mpa_v1) {
2621 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
2622 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2623 dst_release(ep->dst);
2624 cxgb4_l2t_release(ep->l2t);
2625 c4iw_reconnect(ep);
2626 }
2627
2628 return 0;
2629 }
2630
close_con_rpl(struct c4iw_dev * dev,struct sk_buff * skb)2631 static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2632 {
2633 struct c4iw_ep *ep;
2634 struct c4iw_qp_attributes attrs;
2635 struct cpl_close_con_rpl *rpl = cplhdr(skb);
2636 int release = 0;
2637 struct tid_info *t = dev->rdev.lldi.tids;
2638 unsigned int tid = GET_TID(rpl);
2639
2640 ep = lookup_tid(t, tid);
2641
2642 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2643 BUG_ON(!ep);
2644
2645 /* The cm_id may be null if we failed to connect */
2646 mutex_lock(&ep->com.mutex);
2647 switch (ep->com.state) {
2648 case CLOSING:
2649 __state_set(&ep->com, MORIBUND);
2650 break;
2651 case MORIBUND:
2652 (void)stop_ep_timer(ep);
2653 if ((ep->com.cm_id) && (ep->com.qp)) {
2654 attrs.next_state = C4IW_QP_STATE_IDLE;
2655 c4iw_modify_qp(ep->com.qp->rhp,
2656 ep->com.qp,
2657 C4IW_QP_ATTR_NEXT_STATE,
2658 &attrs, 1);
2659 }
2660 close_complete_upcall(ep, 0);
2661 __state_set(&ep->com, DEAD);
2662 release = 1;
2663 break;
2664 case ABORTING:
2665 case DEAD:
2666 break;
2667 default:
2668 BUG_ON(1);
2669 break;
2670 }
2671 mutex_unlock(&ep->com.mutex);
2672 if (release)
2673 release_ep_resources(ep);
2674 return 0;
2675 }
2676
terminate(struct c4iw_dev * dev,struct sk_buff * skb)2677 static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2678 {
2679 struct cpl_rdma_terminate *rpl = cplhdr(skb);
2680 struct tid_info *t = dev->rdev.lldi.tids;
2681 unsigned int tid = GET_TID(rpl);
2682 struct c4iw_ep *ep;
2683 struct c4iw_qp_attributes attrs;
2684
2685 ep = lookup_tid(t, tid);
2686 BUG_ON(!ep);
2687
2688 if (ep && ep->com.qp) {
2689 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2690 ep->com.qp->wq.sq.qid);
2691 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2692 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2693 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2694 } else
2695 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
2696
2697 return 0;
2698 }
2699
2700 /*
2701 * Upcall from the adapter indicating data has been transmitted.
2702 * For us its just the single MPA request or reply. We can now free
2703 * the skb holding the mpa message.
2704 */
fw4_ack(struct c4iw_dev * dev,struct sk_buff * skb)2705 static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2706 {
2707 struct c4iw_ep *ep;
2708 struct cpl_fw4_ack *hdr = cplhdr(skb);
2709 u8 credits = hdr->credits;
2710 unsigned int tid = GET_TID(hdr);
2711 struct tid_info *t = dev->rdev.lldi.tids;
2712
2713
2714 ep = lookup_tid(t, tid);
2715 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
2716 if (credits == 0) {
2717 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
2718 __func__, ep, ep->hwtid, state_read(&ep->com));
2719 return 0;
2720 }
2721
2722 dst_confirm(ep->dst);
2723 if (ep->mpa_skb) {
2724 PDBG("%s last streaming msg ack ep %p tid %u state %u "
2725 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
2726 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
2727 kfree_skb(ep->mpa_skb);
2728 ep->mpa_skb = NULL;
2729 }
2730 return 0;
2731 }
2732
c4iw_reject_cr(struct iw_cm_id * cm_id,const void * pdata,u8 pdata_len)2733 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2734 {
2735 int err = 0;
2736 int disconnect = 0;
2737 struct c4iw_ep *ep = to_ep(cm_id);
2738 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2739
2740 mutex_lock(&ep->com.mutex);
2741 if (ep->com.state == DEAD) {
2742 mutex_unlock(&ep->com.mutex);
2743 c4iw_put_ep(&ep->com);
2744 return -ECONNRESET;
2745 }
2746 set_bit(ULP_REJECT, &ep->com.history);
2747 BUG_ON(ep->com.state != MPA_REQ_RCVD);
2748 if (mpa_rev == 0)
2749 abort_connection(ep, NULL, GFP_KERNEL);
2750 else {
2751 err = send_mpa_reject(ep, pdata, pdata_len);
2752 disconnect = 1;
2753 }
2754 mutex_unlock(&ep->com.mutex);
2755 if (disconnect)
2756 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2757 c4iw_put_ep(&ep->com);
2758 return 0;
2759 }
2760
c4iw_accept_cr(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)2761 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2762 {
2763 int err;
2764 struct c4iw_qp_attributes attrs;
2765 enum c4iw_qp_attr_mask mask;
2766 struct c4iw_ep *ep = to_ep(cm_id);
2767 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2768 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2769
2770 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2771
2772 mutex_lock(&ep->com.mutex);
2773 if (ep->com.state == DEAD) {
2774 err = -ECONNRESET;
2775 goto err;
2776 }
2777
2778 BUG_ON(ep->com.state != MPA_REQ_RCVD);
2779 BUG_ON(!qp);
2780
2781 set_bit(ULP_ACCEPT, &ep->com.history);
2782 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
2783 (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
2784 abort_connection(ep, NULL, GFP_KERNEL);
2785 err = -EINVAL;
2786 goto err;
2787 }
2788
2789 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2790 if (conn_param->ord > ep->ird) {
2791 if (RELAXED_IRD_NEGOTIATION) {
2792 ep->ord = ep->ird;
2793 } else {
2794 ep->ird = conn_param->ird;
2795 ep->ord = conn_param->ord;
2796 send_mpa_reject(ep, conn_param->private_data,
2797 conn_param->private_data_len);
2798 abort_connection(ep, NULL, GFP_KERNEL);
2799 err = -ENOMEM;
2800 goto err;
2801 }
2802 }
2803 if (conn_param->ird < ep->ord) {
2804 if (RELAXED_IRD_NEGOTIATION &&
2805 ep->ord <= h->rdev.lldi.max_ordird_qp) {
2806 conn_param->ird = ep->ord;
2807 } else {
2808 abort_connection(ep, NULL, GFP_KERNEL);
2809 err = -ENOMEM;
2810 goto err;
2811 }
2812 }
2813 }
2814 ep->ird = conn_param->ird;
2815 ep->ord = conn_param->ord;
2816
2817 if (ep->mpa_attr.version == 1) {
2818 if (peer2peer && ep->ird == 0)
2819 ep->ird = 1;
2820 } else {
2821 if (peer2peer &&
2822 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
2823 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ord == 0)
2824 ep->ird = 1;
2825 }
2826
2827 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
2828
2829 cm_id->add_ref(cm_id);
2830 ep->com.cm_id = cm_id;
2831 ep->com.qp = qp;
2832 ref_qp(ep);
2833
2834 /* bind QP to EP and move to RTS */
2835 attrs.mpa_attr = ep->mpa_attr;
2836 attrs.max_ird = ep->ird;
2837 attrs.max_ord = ep->ord;
2838 attrs.llp_stream_handle = ep;
2839 attrs.next_state = C4IW_QP_STATE_RTS;
2840
2841 /* bind QP and TID with INIT_WR */
2842 mask = C4IW_QP_ATTR_NEXT_STATE |
2843 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2844 C4IW_QP_ATTR_MPA_ATTR |
2845 C4IW_QP_ATTR_MAX_IRD |
2846 C4IW_QP_ATTR_MAX_ORD;
2847
2848 err = c4iw_modify_qp(ep->com.qp->rhp,
2849 ep->com.qp, mask, &attrs, 1);
2850 if (err)
2851 goto err1;
2852 err = send_mpa_reply(ep, conn_param->private_data,
2853 conn_param->private_data_len);
2854 if (err)
2855 goto err1;
2856
2857 __state_set(&ep->com, FPDU_MODE);
2858 established_upcall(ep);
2859 mutex_unlock(&ep->com.mutex);
2860 c4iw_put_ep(&ep->com);
2861 return 0;
2862 err1:
2863 ep->com.cm_id = NULL;
2864 abort_connection(ep, NULL, GFP_KERNEL);
2865 cm_id->rem_ref(cm_id);
2866 err:
2867 mutex_unlock(&ep->com.mutex);
2868 c4iw_put_ep(&ep->com);
2869 return err;
2870 }
2871
pick_local_ipaddrs(struct c4iw_dev * dev,struct iw_cm_id * cm_id)2872 static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2873 {
2874 struct in_device *ind;
2875 int found = 0;
2876 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
2877 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
2878
2879 ind = in_dev_get(dev->rdev.lldi.ports[0]);
2880 if (!ind)
2881 return -EADDRNOTAVAIL;
2882 for_primary_ifa(ind) {
2883 laddr->sin_addr.s_addr = ifa->ifa_address;
2884 raddr->sin_addr.s_addr = ifa->ifa_address;
2885 found = 1;
2886 break;
2887 }
2888 endfor_ifa(ind);
2889 in_dev_put(ind);
2890 return found ? 0 : -EADDRNOTAVAIL;
2891 }
2892
get_lladdr(struct net_device * dev,struct in6_addr * addr,unsigned char banned_flags)2893 static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
2894 unsigned char banned_flags)
2895 {
2896 struct inet6_dev *idev;
2897 int err = -EADDRNOTAVAIL;
2898
2899 rcu_read_lock();
2900 idev = __in6_dev_get(dev);
2901 if (idev != NULL) {
2902 struct inet6_ifaddr *ifp;
2903
2904 read_lock_bh(&idev->lock);
2905 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2906 if (ifp->scope == IFA_LINK &&
2907 !(ifp->flags & banned_flags)) {
2908 memcpy(addr, &ifp->addr, 16);
2909 err = 0;
2910 break;
2911 }
2912 }
2913 read_unlock_bh(&idev->lock);
2914 }
2915 rcu_read_unlock();
2916 return err;
2917 }
2918
pick_local_ip6addrs(struct c4iw_dev * dev,struct iw_cm_id * cm_id)2919 static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2920 {
2921 struct in6_addr uninitialized_var(addr);
2922 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->local_addr;
2923 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->remote_addr;
2924
2925 if (get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
2926 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
2927 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
2928 return 0;
2929 }
2930 return -EADDRNOTAVAIL;
2931 }
2932
c4iw_connect(struct iw_cm_id * cm_id,struct iw_cm_conn_param * conn_param)2933 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2934 {
2935 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2936 struct c4iw_ep *ep;
2937 int err = 0;
2938 struct sockaddr_in *laddr;
2939 struct sockaddr_in *raddr;
2940 struct sockaddr_in6 *laddr6;
2941 struct sockaddr_in6 *raddr6;
2942 struct iwpm_dev_data pm_reg_msg;
2943 struct iwpm_sa_data pm_msg;
2944 __u8 *ra;
2945 int iptype;
2946 int iwpm_err = 0;
2947
2948 if ((conn_param->ord > cur_max_read_depth(dev)) ||
2949 (conn_param->ird > cur_max_read_depth(dev))) {
2950 err = -EINVAL;
2951 goto out;
2952 }
2953 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2954 if (!ep) {
2955 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2956 err = -ENOMEM;
2957 goto out;
2958 }
2959 init_timer(&ep->timer);
2960 ep->plen = conn_param->private_data_len;
2961 if (ep->plen)
2962 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
2963 conn_param->private_data, ep->plen);
2964 ep->ird = conn_param->ird;
2965 ep->ord = conn_param->ord;
2966
2967 if (peer2peer && ep->ord == 0)
2968 ep->ord = 1;
2969
2970 cm_id->add_ref(cm_id);
2971 ep->com.dev = dev;
2972 ep->com.cm_id = cm_id;
2973 ep->com.qp = get_qhp(dev, conn_param->qpn);
2974 if (!ep->com.qp) {
2975 PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
2976 err = -EINVAL;
2977 goto fail1;
2978 }
2979 ref_qp(ep);
2980 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
2981 ep->com.qp, cm_id);
2982
2983 /*
2984 * Allocate an active TID to initiate a TCP connection.
2985 */
2986 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
2987 if (ep->atid == -1) {
2988 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
2989 err = -ENOMEM;
2990 goto fail1;
2991 }
2992 insert_handle(dev, &dev->atid_idr, ep, ep->atid);
2993
2994 memcpy(&ep->com.local_addr, &cm_id->local_addr,
2995 sizeof(ep->com.local_addr));
2996 memcpy(&ep->com.remote_addr, &cm_id->remote_addr,
2997 sizeof(ep->com.remote_addr));
2998
2999 /* No port mapper available, go with the specified peer information */
3000 memcpy(&ep->com.mapped_local_addr, &cm_id->local_addr,
3001 sizeof(ep->com.mapped_local_addr));
3002 memcpy(&ep->com.mapped_remote_addr, &cm_id->remote_addr,
3003 sizeof(ep->com.mapped_remote_addr));
3004
3005 c4iw_form_reg_msg(dev, &pm_reg_msg);
3006 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_C4IW);
3007 if (iwpm_err) {
3008 PDBG("%s: Port Mapper reg pid fail (err = %d).\n",
3009 __func__, iwpm_err);
3010 }
3011 if (iwpm_valid_pid() && !iwpm_err) {
3012 c4iw_form_pm_msg(ep, &pm_msg);
3013 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_C4IW);
3014 if (iwpm_err)
3015 PDBG("%s: Port Mapper query fail (err = %d).\n",
3016 __func__, iwpm_err);
3017 else
3018 c4iw_record_pm_msg(ep, &pm_msg);
3019 }
3020 if (iwpm_create_mapinfo(&ep->com.local_addr,
3021 &ep->com.mapped_local_addr, RDMA_NL_C4IW)) {
3022 iwpm_remove_mapping(&ep->com.local_addr, RDMA_NL_C4IW);
3023 err = -ENOMEM;
3024 goto fail1;
3025 }
3026 print_addr(&ep->com, __func__, "add_query/create_mapinfo");
3027 set_bit(RELEASE_MAPINFO, &ep->com.flags);
3028
3029 laddr = (struct sockaddr_in *)&ep->com.mapped_local_addr;
3030 raddr = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
3031 laddr6 = (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
3032 raddr6 = (struct sockaddr_in6 *) &ep->com.mapped_remote_addr;
3033
3034 if (cm_id->remote_addr.ss_family == AF_INET) {
3035 iptype = 4;
3036 ra = (__u8 *)&raddr->sin_addr;
3037
3038 /*
3039 * Handle loopback requests to INADDR_ANY.
3040 */
3041 if ((__force int)raddr->sin_addr.s_addr == INADDR_ANY) {
3042 err = pick_local_ipaddrs(dev, cm_id);
3043 if (err)
3044 goto fail1;
3045 }
3046
3047 /* find a route */
3048 PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
3049 __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
3050 ra, ntohs(raddr->sin_port));
3051 ep->dst = find_route(dev, laddr->sin_addr.s_addr,
3052 raddr->sin_addr.s_addr, laddr->sin_port,
3053 raddr->sin_port, 0);
3054 } else {
3055 iptype = 6;
3056 ra = (__u8 *)&raddr6->sin6_addr;
3057
3058 /*
3059 * Handle loopback requests to INADDR_ANY.
3060 */
3061 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
3062 err = pick_local_ip6addrs(dev, cm_id);
3063 if (err)
3064 goto fail1;
3065 }
3066
3067 /* find a route */
3068 PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
3069 __func__, laddr6->sin6_addr.s6_addr,
3070 ntohs(laddr6->sin6_port),
3071 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
3072 ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
3073 raddr6->sin6_addr.s6_addr,
3074 laddr6->sin6_port, raddr6->sin6_port, 0,
3075 raddr6->sin6_scope_id);
3076 }
3077 if (!ep->dst) {
3078 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
3079 err = -EHOSTUNREACH;
3080 goto fail2;
3081 }
3082
3083 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true);
3084 if (err) {
3085 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
3086 goto fail3;
3087 }
3088
3089 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
3090 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
3091 ep->l2t->idx);
3092
3093 state_set(&ep->com, CONNECTING);
3094 ep->tos = 0;
3095
3096 /* send connect request to rnic */
3097 err = send_connect(ep);
3098 if (!err)
3099 goto out;
3100
3101 cxgb4_l2t_release(ep->l2t);
3102 fail3:
3103 dst_release(ep->dst);
3104 fail2:
3105 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
3106 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
3107 fail1:
3108 cm_id->rem_ref(cm_id);
3109 c4iw_put_ep(&ep->com);
3110 out:
3111 return err;
3112 }
3113
create_server6(struct c4iw_dev * dev,struct c4iw_listen_ep * ep)3114 static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3115 {
3116 int err;
3117 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
3118 &ep->com.mapped_local_addr;
3119
3120 c4iw_init_wr_wait(&ep->com.wr_wait);
3121 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
3122 ep->stid, &sin6->sin6_addr,
3123 sin6->sin6_port,
3124 ep->com.dev->rdev.lldi.rxq_ids[0]);
3125 if (!err)
3126 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3127 &ep->com.wr_wait,
3128 0, 0, __func__);
3129 if (err)
3130 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
3131 err, ep->stid,
3132 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
3133 return err;
3134 }
3135
create_server4(struct c4iw_dev * dev,struct c4iw_listen_ep * ep)3136 static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3137 {
3138 int err;
3139 struct sockaddr_in *sin = (struct sockaddr_in *)
3140 &ep->com.mapped_local_addr;
3141
3142 if (dev->rdev.lldi.enable_fw_ofld_conn) {
3143 do {
3144 err = cxgb4_create_server_filter(
3145 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3146 sin->sin_addr.s_addr, sin->sin_port, 0,
3147 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
3148 if (err == -EBUSY) {
3149 set_current_state(TASK_UNINTERRUPTIBLE);
3150 schedule_timeout(usecs_to_jiffies(100));
3151 }
3152 } while (err == -EBUSY);
3153 } else {
3154 c4iw_init_wr_wait(&ep->com.wr_wait);
3155 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
3156 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
3157 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
3158 if (!err)
3159 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3160 &ep->com.wr_wait,
3161 0, 0, __func__);
3162 }
3163 if (err)
3164 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
3165 , err, ep->stid,
3166 &sin->sin_addr, ntohs(sin->sin_port));
3167 return err;
3168 }
3169
c4iw_create_listen(struct iw_cm_id * cm_id,int backlog)3170 int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3171 {
3172 int err = 0;
3173 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3174 struct c4iw_listen_ep *ep;
3175 struct iwpm_dev_data pm_reg_msg;
3176 struct iwpm_sa_data pm_msg;
3177 int iwpm_err = 0;
3178
3179 might_sleep();
3180
3181 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3182 if (!ep) {
3183 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
3184 err = -ENOMEM;
3185 goto fail1;
3186 }
3187 PDBG("%s ep %p\n", __func__, ep);
3188 cm_id->add_ref(cm_id);
3189 ep->com.cm_id = cm_id;
3190 ep->com.dev = dev;
3191 ep->backlog = backlog;
3192 memcpy(&ep->com.local_addr, &cm_id->local_addr,
3193 sizeof(ep->com.local_addr));
3194
3195 /*
3196 * Allocate a server TID.
3197 */
3198 if (dev->rdev.lldi.enable_fw_ofld_conn &&
3199 ep->com.local_addr.ss_family == AF_INET)
3200 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
3201 cm_id->local_addr.ss_family, ep);
3202 else
3203 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
3204 cm_id->local_addr.ss_family, ep);
3205
3206 if (ep->stid == -1) {
3207 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
3208 err = -ENOMEM;
3209 goto fail2;
3210 }
3211 insert_handle(dev, &dev->stid_idr, ep, ep->stid);
3212
3213 /* No port mapper available, go with the specified info */
3214 memcpy(&ep->com.mapped_local_addr, &cm_id->local_addr,
3215 sizeof(ep->com.mapped_local_addr));
3216
3217 c4iw_form_reg_msg(dev, &pm_reg_msg);
3218 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_C4IW);
3219 if (iwpm_err) {
3220 PDBG("%s: Port Mapper reg pid fail (err = %d).\n",
3221 __func__, iwpm_err);
3222 }
3223 if (iwpm_valid_pid() && !iwpm_err) {
3224 memcpy(&pm_msg.loc_addr, &ep->com.local_addr,
3225 sizeof(ep->com.local_addr));
3226 iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_C4IW);
3227 if (iwpm_err)
3228 PDBG("%s: Port Mapper query fail (err = %d).\n",
3229 __func__, iwpm_err);
3230 else
3231 memcpy(&ep->com.mapped_local_addr,
3232 &pm_msg.mapped_loc_addr,
3233 sizeof(ep->com.mapped_local_addr));
3234 }
3235 if (iwpm_create_mapinfo(&ep->com.local_addr,
3236 &ep->com.mapped_local_addr, RDMA_NL_C4IW)) {
3237 err = -ENOMEM;
3238 goto fail3;
3239 }
3240 print_addr(&ep->com, __func__, "add_mapping/create_mapinfo");
3241
3242 set_bit(RELEASE_MAPINFO, &ep->com.flags);
3243 state_set(&ep->com, LISTEN);
3244 if (ep->com.local_addr.ss_family == AF_INET)
3245 err = create_server4(dev, ep);
3246 else
3247 err = create_server6(dev, ep);
3248 if (!err) {
3249 cm_id->provider_data = ep;
3250 goto out;
3251 }
3252
3253 fail3:
3254 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3255 ep->com.local_addr.ss_family);
3256 fail2:
3257 cm_id->rem_ref(cm_id);
3258 c4iw_put_ep(&ep->com);
3259 fail1:
3260 out:
3261 return err;
3262 }
3263
c4iw_destroy_listen(struct iw_cm_id * cm_id)3264 int c4iw_destroy_listen(struct iw_cm_id *cm_id)
3265 {
3266 int err;
3267 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
3268
3269 PDBG("%s ep %p\n", __func__, ep);
3270
3271 might_sleep();
3272 state_set(&ep->com, DEAD);
3273 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
3274 ep->com.local_addr.ss_family == AF_INET) {
3275 err = cxgb4_remove_server_filter(
3276 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3277 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3278 } else {
3279 c4iw_init_wr_wait(&ep->com.wr_wait);
3280 err = cxgb4_remove_server(
3281 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3282 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3283 if (err)
3284 goto done;
3285 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
3286 0, 0, __func__);
3287 }
3288 remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
3289 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3290 ep->com.local_addr.ss_family);
3291 done:
3292 cm_id->rem_ref(cm_id);
3293 c4iw_put_ep(&ep->com);
3294 return err;
3295 }
3296
c4iw_ep_disconnect(struct c4iw_ep * ep,int abrupt,gfp_t gfp)3297 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3298 {
3299 int ret = 0;
3300 int close = 0;
3301 int fatal = 0;
3302 struct c4iw_rdev *rdev;
3303
3304 mutex_lock(&ep->com.mutex);
3305
3306 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
3307 states[ep->com.state], abrupt);
3308
3309 rdev = &ep->com.dev->rdev;
3310 if (c4iw_fatal_error(rdev)) {
3311 fatal = 1;
3312 close_complete_upcall(ep, -EIO);
3313 ep->com.state = DEAD;
3314 }
3315 switch (ep->com.state) {
3316 case MPA_REQ_WAIT:
3317 case MPA_REQ_SENT:
3318 case MPA_REQ_RCVD:
3319 case MPA_REP_SENT:
3320 case FPDU_MODE:
3321 close = 1;
3322 if (abrupt)
3323 ep->com.state = ABORTING;
3324 else {
3325 ep->com.state = CLOSING;
3326 start_ep_timer(ep);
3327 }
3328 set_bit(CLOSE_SENT, &ep->com.flags);
3329 break;
3330 case CLOSING:
3331 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3332 close = 1;
3333 if (abrupt) {
3334 (void)stop_ep_timer(ep);
3335 ep->com.state = ABORTING;
3336 } else
3337 ep->com.state = MORIBUND;
3338 }
3339 break;
3340 case MORIBUND:
3341 case ABORTING:
3342 case DEAD:
3343 PDBG("%s ignoring disconnect ep %p state %u\n",
3344 __func__, ep, ep->com.state);
3345 break;
3346 default:
3347 BUG();
3348 break;
3349 }
3350
3351 if (close) {
3352 if (abrupt) {
3353 set_bit(EP_DISC_ABORT, &ep->com.history);
3354 close_complete_upcall(ep, -ECONNRESET);
3355 ret = send_abort(ep, NULL, gfp);
3356 } else {
3357 set_bit(EP_DISC_CLOSE, &ep->com.history);
3358 ret = send_halfclose(ep, gfp);
3359 }
3360 if (ret)
3361 fatal = 1;
3362 }
3363 mutex_unlock(&ep->com.mutex);
3364 if (fatal)
3365 release_ep_resources(ep);
3366 return ret;
3367 }
3368
active_ofld_conn_reply(struct c4iw_dev * dev,struct sk_buff * skb,struct cpl_fw6_msg_ofld_connection_wr_rpl * req)3369 static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3370 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3371 {
3372 struct c4iw_ep *ep;
3373 int atid = be32_to_cpu(req->tid);
3374
3375 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3376 (__force u32) req->tid);
3377 if (!ep)
3378 return;
3379
3380 switch (req->retval) {
3381 case FW_ENOMEM:
3382 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3383 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3384 send_fw_act_open_req(ep, atid);
3385 return;
3386 }
3387 case FW_EADDRINUSE:
3388 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3389 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3390 send_fw_act_open_req(ep, atid);
3391 return;
3392 }
3393 break;
3394 default:
3395 pr_info("%s unexpected ofld conn wr retval %d\n",
3396 __func__, req->retval);
3397 break;
3398 }
3399 pr_err("active ofld_connect_wr failure %d atid %d\n",
3400 req->retval, atid);
3401 mutex_lock(&dev->rdev.stats.lock);
3402 dev->rdev.stats.act_ofld_conn_fails++;
3403 mutex_unlock(&dev->rdev.stats.lock);
3404 connect_reply_upcall(ep, status2errno(req->retval));
3405 state_set(&ep->com, DEAD);
3406 remove_handle(dev, &dev->atid_idr, atid);
3407 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3408 dst_release(ep->dst);
3409 cxgb4_l2t_release(ep->l2t);
3410 c4iw_put_ep(&ep->com);
3411 }
3412
passive_ofld_conn_reply(struct c4iw_dev * dev,struct sk_buff * skb,struct cpl_fw6_msg_ofld_connection_wr_rpl * req)3413 static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3414 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3415 {
3416 struct sk_buff *rpl_skb;
3417 struct cpl_pass_accept_req *cpl;
3418 int ret;
3419
3420 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
3421 BUG_ON(!rpl_skb);
3422 if (req->retval) {
3423 PDBG("%s passive open failure %d\n", __func__, req->retval);
3424 mutex_lock(&dev->rdev.stats.lock);
3425 dev->rdev.stats.pas_ofld_conn_fails++;
3426 mutex_unlock(&dev->rdev.stats.lock);
3427 kfree_skb(rpl_skb);
3428 } else {
3429 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3430 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
3431 (__force u32) htonl(
3432 (__force u32) req->tid)));
3433 ret = pass_accept_req(dev, rpl_skb);
3434 if (!ret)
3435 kfree_skb(rpl_skb);
3436 }
3437 return;
3438 }
3439
deferred_fw6_msg(struct c4iw_dev * dev,struct sk_buff * skb)3440 static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3441 {
3442 struct cpl_fw6_msg *rpl = cplhdr(skb);
3443 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3444
3445 switch (rpl->type) {
3446 case FW6_TYPE_CQE:
3447 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3448 break;
3449 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3450 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3451 switch (req->t_state) {
3452 case TCP_SYN_SENT:
3453 active_ofld_conn_reply(dev, skb, req);
3454 break;
3455 case TCP_SYN_RECV:
3456 passive_ofld_conn_reply(dev, skb, req);
3457 break;
3458 default:
3459 pr_err("%s unexpected ofld conn wr state %d\n",
3460 __func__, req->t_state);
3461 break;
3462 }
3463 break;
3464 }
3465 return 0;
3466 }
3467
build_cpl_pass_accept_req(struct sk_buff * skb,int stid,u8 tos)3468 static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3469 {
3470 u32 l2info;
3471 u16 vlantag, len, hdr_len, eth_hdr_len;
3472 u8 intf;
3473 struct cpl_rx_pkt *cpl = cplhdr(skb);
3474 struct cpl_pass_accept_req *req;
3475 struct tcp_options_received tmp_opt;
3476 struct c4iw_dev *dev;
3477
3478 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3479 /* Store values from cpl_rx_pkt in temporary location. */
3480 vlantag = (__force u16) cpl->vlan;
3481 len = (__force u16) cpl->len;
3482 l2info = (__force u32) cpl->l2info;
3483 hdr_len = (__force u16) cpl->hdr_len;
3484 intf = cpl->iff;
3485
3486 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3487
3488 /*
3489 * We need to parse the TCP options from SYN packet.
3490 * to generate cpl_pass_accept_req.
3491 */
3492 memset(&tmp_opt, 0, sizeof(tmp_opt));
3493 tcp_clear_options(&tmp_opt);
3494 tcp_parse_options(skb, &tmp_opt, 0, NULL);
3495
3496 req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
3497 memset(req, 0, sizeof(*req));
3498 req->l2info = cpu_to_be16(V_SYN_INTF(intf) |
3499 V_SYN_MAC_IDX(G_RX_MACIDX(
3500 (__force int) htonl(l2info))) |
3501 F_SYN_XACT_MATCH);
3502 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
3503 G_RX_ETHHDR_LEN((__force int) htonl(l2info)) :
3504 G_RX_T5_ETHHDR_LEN((__force int) htonl(l2info));
3505 req->hdr_len = cpu_to_be32(V_SYN_RX_CHAN(G_RX_CHAN(
3506 (__force int) htonl(l2info))) |
3507 V_TCP_HDR_LEN(G_RX_TCPHDR_LEN(
3508 (__force int) htons(hdr_len))) |
3509 V_IP_HDR_LEN(G_RX_IPHDR_LEN(
3510 (__force int) htons(hdr_len))) |
3511 V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(eth_hdr_len)));
3512 req->vlan = (__force __be16) vlantag;
3513 req->len = (__force __be16) len;
3514 req->tos_stid = cpu_to_be32(PASS_OPEN_TID(stid) |
3515 PASS_OPEN_TOS(tos));
3516 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3517 if (tmp_opt.wscale_ok)
3518 req->tcpopt.wsf = tmp_opt.snd_wscale;
3519 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3520 if (tmp_opt.sack_ok)
3521 req->tcpopt.sack = 1;
3522 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3523 return;
3524 }
3525
send_fw_pass_open_req(struct c4iw_dev * dev,struct sk_buff * skb,__be32 laddr,__be16 lport,__be32 raddr,__be16 rport,u32 rcv_isn,u32 filter,u16 window,u32 rss_qid,u8 port_id)3526 static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3527 __be32 laddr, __be16 lport,
3528 __be32 raddr, __be16 rport,
3529 u32 rcv_isn, u32 filter, u16 window,
3530 u32 rss_qid, u8 port_id)
3531 {
3532 struct sk_buff *req_skb;
3533 struct fw_ofld_connection_wr *req;
3534 struct cpl_pass_accept_req *cpl = cplhdr(skb);
3535 int ret;
3536
3537 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
3538 req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
3539 memset(req, 0, sizeof(*req));
3540 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL(1));
3541 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
3542 req->le.version_cpl = htonl(F_FW_OFLD_CONNECTION_WR_CPL);
3543 req->le.filter = (__force __be32) filter;
3544 req->le.lport = lport;
3545 req->le.pport = rport;
3546 req->le.u.ipv4.lip = laddr;
3547 req->le.u.ipv4.pip = raddr;
3548 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
3549 req->tcb.rcv_adv = htons(window);
3550 req->tcb.t_state_to_astid =
3551 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_RECV) |
3552 V_FW_OFLD_CONNECTION_WR_RCV_SCALE(cpl->tcpopt.wsf) |
3553 V_FW_OFLD_CONNECTION_WR_ASTID(
3554 GET_PASS_OPEN_TID(ntohl(cpl->tos_stid))));
3555
3556 /*
3557 * We store the qid in opt2 which will be used by the firmware
3558 * to send us the wr response.
3559 */
3560 req->tcb.opt2 = htonl(V_RSS_QUEUE(rss_qid));
3561
3562 /*
3563 * We initialize the MSS index in TCB to 0xF.
3564 * So that when driver sends cpl_pass_accept_rpl
3565 * TCB picks up the correct value. If this was 0
3566 * TP will ignore any value > 0 for MSS index.
3567 */
3568 req->tcb.opt0 = cpu_to_be64(V_MSS_IDX(0xF));
3569 req->cookie = (unsigned long)skb;
3570
3571 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
3572 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
3573 if (ret < 0) {
3574 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
3575 ret);
3576 kfree_skb(skb);
3577 kfree_skb(req_skb);
3578 }
3579 }
3580
3581 /*
3582 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
3583 * messages when a filter is being used instead of server to
3584 * redirect a syn packet. When packets hit filter they are redirected
3585 * to the offload queue and driver tries to establish the connection
3586 * using firmware work request.
3587 */
rx_pkt(struct c4iw_dev * dev,struct sk_buff * skb)3588 static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
3589 {
3590 int stid;
3591 unsigned int filter;
3592 struct ethhdr *eh = NULL;
3593 struct vlan_ethhdr *vlan_eh = NULL;
3594 struct iphdr *iph;
3595 struct tcphdr *tcph;
3596 struct rss_header *rss = (void *)skb->data;
3597 struct cpl_rx_pkt *cpl = (void *)skb->data;
3598 struct cpl_pass_accept_req *req = (void *)(rss + 1);
3599 struct l2t_entry *e;
3600 struct dst_entry *dst;
3601 struct c4iw_ep *lep;
3602 u16 window;
3603 struct port_info *pi;
3604 struct net_device *pdev;
3605 u16 rss_qid, eth_hdr_len;
3606 int step;
3607 u32 tx_chan;
3608 struct neighbour *neigh;
3609
3610 /* Drop all non-SYN packets */
3611 if (!(cpl->l2info & cpu_to_be32(F_RXF_SYN)))
3612 goto reject;
3613
3614 /*
3615 * Drop all packets which did not hit the filter.
3616 * Unlikely to happen.
3617 */
3618 if (!(rss->filter_hit && rss->filter_tid))
3619 goto reject;
3620
3621 /*
3622 * Calculate the server tid from filter hit index from cpl_rx_pkt.
3623 */
3624 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
3625
3626 lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid);
3627 if (!lep) {
3628 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
3629 goto reject;
3630 }
3631
3632 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
3633 G_RX_ETHHDR_LEN(htonl(cpl->l2info)) :
3634 G_RX_T5_ETHHDR_LEN(htonl(cpl->l2info));
3635 if (eth_hdr_len == ETH_HLEN) {
3636 eh = (struct ethhdr *)(req + 1);
3637 iph = (struct iphdr *)(eh + 1);
3638 } else {
3639 vlan_eh = (struct vlan_ethhdr *)(req + 1);
3640 iph = (struct iphdr *)(vlan_eh + 1);
3641 skb->vlan_tci = ntohs(cpl->vlan);
3642 }
3643
3644 if (iph->version != 0x4)
3645 goto reject;
3646
3647 tcph = (struct tcphdr *)(iph + 1);
3648 skb_set_network_header(skb, (void *)iph - (void *)rss);
3649 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
3650 skb_get(skb);
3651
3652 PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
3653 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
3654 ntohs(tcph->source), iph->tos);
3655
3656 dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
3657 iph->tos);
3658 if (!dst) {
3659 pr_err("%s - failed to find dst entry!\n",
3660 __func__);
3661 goto reject;
3662 }
3663 neigh = dst_neigh_lookup_skb(dst, skb);
3664
3665 if (!neigh) {
3666 pr_err("%s - failed to allocate neigh!\n",
3667 __func__);
3668 goto free_dst;
3669 }
3670
3671 if (neigh->dev->flags & IFF_LOOPBACK) {
3672 pdev = ip_dev_find(&init_net, iph->daddr);
3673 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3674 pdev, 0);
3675 pi = (struct port_info *)netdev_priv(pdev);
3676 tx_chan = cxgb4_port_chan(pdev);
3677 dev_put(pdev);
3678 } else {
3679 pdev = get_real_dev(neigh->dev);
3680 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3681 pdev, 0);
3682 pi = (struct port_info *)netdev_priv(pdev);
3683 tx_chan = cxgb4_port_chan(pdev);
3684 }
3685 neigh_release(neigh);
3686 if (!e) {
3687 pr_err("%s - failed to allocate l2t entry!\n",
3688 __func__);
3689 goto free_dst;
3690 }
3691
3692 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
3693 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
3694 window = (__force u16) htons((__force u16)tcph->window);
3695
3696 /* Calcuate filter portion for LE region. */
3697 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
3698 dev->rdev.lldi.ports[0],
3699 e));
3700
3701 /*
3702 * Synthesize the cpl_pass_accept_req. We have everything except the
3703 * TID. Once firmware sends a reply with TID we update the TID field
3704 * in cpl and pass it through the regular cpl_pass_accept_req path.
3705 */
3706 build_cpl_pass_accept_req(skb, stid, iph->tos);
3707 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
3708 tcph->source, ntohl(tcph->seq), filter, window,
3709 rss_qid, pi->port_id);
3710 cxgb4_l2t_release(e);
3711 free_dst:
3712 dst_release(dst);
3713 reject:
3714 return 0;
3715 }
3716
3717 /*
3718 * These are the real handlers that are called from a
3719 * work queue.
3720 */
3721 static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
3722 [CPL_ACT_ESTABLISH] = act_establish,
3723 [CPL_ACT_OPEN_RPL] = act_open_rpl,
3724 [CPL_RX_DATA] = rx_data,
3725 [CPL_ABORT_RPL_RSS] = abort_rpl,
3726 [CPL_ABORT_RPL] = abort_rpl,
3727 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
3728 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
3729 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
3730 [CPL_PASS_ESTABLISH] = pass_establish,
3731 [CPL_PEER_CLOSE] = peer_close,
3732 [CPL_ABORT_REQ_RSS] = peer_abort,
3733 [CPL_CLOSE_CON_RPL] = close_con_rpl,
3734 [CPL_RDMA_TERMINATE] = terminate,
3735 [CPL_FW4_ACK] = fw4_ack,
3736 [CPL_FW6_MSG] = deferred_fw6_msg,
3737 [CPL_RX_PKT] = rx_pkt
3738 };
3739
process_timeout(struct c4iw_ep * ep)3740 static void process_timeout(struct c4iw_ep *ep)
3741 {
3742 struct c4iw_qp_attributes attrs;
3743 int abort = 1;
3744
3745 mutex_lock(&ep->com.mutex);
3746 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
3747 ep->com.state);
3748 set_bit(TIMEDOUT, &ep->com.history);
3749 switch (ep->com.state) {
3750 case MPA_REQ_SENT:
3751 __state_set(&ep->com, ABORTING);
3752 connect_reply_upcall(ep, -ETIMEDOUT);
3753 break;
3754 case MPA_REQ_WAIT:
3755 __state_set(&ep->com, ABORTING);
3756 break;
3757 case CLOSING:
3758 case MORIBUND:
3759 if (ep->com.cm_id && ep->com.qp) {
3760 attrs.next_state = C4IW_QP_STATE_ERROR;
3761 c4iw_modify_qp(ep->com.qp->rhp,
3762 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
3763 &attrs, 1);
3764 }
3765 __state_set(&ep->com, ABORTING);
3766 close_complete_upcall(ep, -ETIMEDOUT);
3767 break;
3768 case ABORTING:
3769 case DEAD:
3770
3771 /*
3772 * These states are expected if the ep timed out at the same
3773 * time as another thread was calling stop_ep_timer().
3774 * So we silently do nothing for these states.
3775 */
3776 abort = 0;
3777 break;
3778 default:
3779 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
3780 __func__, ep, ep->hwtid, ep->com.state);
3781 abort = 0;
3782 }
3783 if (abort)
3784 abort_connection(ep, NULL, GFP_KERNEL);
3785 mutex_unlock(&ep->com.mutex);
3786 c4iw_put_ep(&ep->com);
3787 }
3788
process_timedout_eps(void)3789 static void process_timedout_eps(void)
3790 {
3791 struct c4iw_ep *ep;
3792
3793 spin_lock_irq(&timeout_lock);
3794 while (!list_empty(&timeout_list)) {
3795 struct list_head *tmp;
3796
3797 tmp = timeout_list.next;
3798 list_del(tmp);
3799 tmp->next = NULL;
3800 tmp->prev = NULL;
3801 spin_unlock_irq(&timeout_lock);
3802 ep = list_entry(tmp, struct c4iw_ep, entry);
3803 process_timeout(ep);
3804 spin_lock_irq(&timeout_lock);
3805 }
3806 spin_unlock_irq(&timeout_lock);
3807 }
3808
process_work(struct work_struct * work)3809 static void process_work(struct work_struct *work)
3810 {
3811 struct sk_buff *skb = NULL;
3812 struct c4iw_dev *dev;
3813 struct cpl_act_establish *rpl;
3814 unsigned int opcode;
3815 int ret;
3816
3817 process_timedout_eps();
3818 while ((skb = skb_dequeue(&rxq))) {
3819 rpl = cplhdr(skb);
3820 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3821 opcode = rpl->ot.opcode;
3822
3823 BUG_ON(!work_handlers[opcode]);
3824 ret = work_handlers[opcode](dev, skb);
3825 if (!ret)
3826 kfree_skb(skb);
3827 process_timedout_eps();
3828 }
3829 }
3830
3831 static DECLARE_WORK(skb_work, process_work);
3832
ep_timeout(unsigned long arg)3833 static void ep_timeout(unsigned long arg)
3834 {
3835 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
3836 int kickit = 0;
3837
3838 spin_lock(&timeout_lock);
3839 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
3840 /*
3841 * Only insert if it is not already on the list.
3842 */
3843 if (!ep->entry.next) {
3844 list_add_tail(&ep->entry, &timeout_list);
3845 kickit = 1;
3846 }
3847 }
3848 spin_unlock(&timeout_lock);
3849 if (kickit)
3850 queue_work(workq, &skb_work);
3851 }
3852
3853 /*
3854 * All the CM events are handled on a work queue to have a safe context.
3855 */
sched(struct c4iw_dev * dev,struct sk_buff * skb)3856 static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
3857 {
3858
3859 /*
3860 * Save dev in the skb->cb area.
3861 */
3862 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
3863
3864 /*
3865 * Queue the skb and schedule the worker thread.
3866 */
3867 skb_queue_tail(&rxq, skb);
3868 queue_work(workq, &skb_work);
3869 return 0;
3870 }
3871
set_tcb_rpl(struct c4iw_dev * dev,struct sk_buff * skb)3872 static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
3873 {
3874 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
3875
3876 if (rpl->status != CPL_ERR_NONE) {
3877 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
3878 "for tid %u\n", rpl->status, GET_TID(rpl));
3879 }
3880 kfree_skb(skb);
3881 return 0;
3882 }
3883
fw6_msg(struct c4iw_dev * dev,struct sk_buff * skb)3884 static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3885 {
3886 struct cpl_fw6_msg *rpl = cplhdr(skb);
3887 struct c4iw_wr_wait *wr_waitp;
3888 int ret;
3889
3890 PDBG("%s type %u\n", __func__, rpl->type);
3891
3892 switch (rpl->type) {
3893 case FW6_TYPE_WR_RPL:
3894 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
3895 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
3896 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
3897 if (wr_waitp)
3898 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
3899 kfree_skb(skb);
3900 break;
3901 case FW6_TYPE_CQE:
3902 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3903 sched(dev, skb);
3904 break;
3905 default:
3906 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
3907 rpl->type);
3908 kfree_skb(skb);
3909 break;
3910 }
3911 return 0;
3912 }
3913
peer_abort_intr(struct c4iw_dev * dev,struct sk_buff * skb)3914 static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
3915 {
3916 struct cpl_abort_req_rss *req = cplhdr(skb);
3917 struct c4iw_ep *ep;
3918 struct tid_info *t = dev->rdev.lldi.tids;
3919 unsigned int tid = GET_TID(req);
3920
3921 ep = lookup_tid(t, tid);
3922 if (!ep) {
3923 printk(KERN_WARNING MOD
3924 "Abort on non-existent endpoint, tid %d\n", tid);
3925 kfree_skb(skb);
3926 return 0;
3927 }
3928 if (is_neg_adv(req->status)) {
3929 dev_warn(&dev->rdev.lldi.pdev->dev,
3930 "Negative advice on abort - tid %u status %d (%s)\n",
3931 ep->hwtid, req->status, neg_adv_str(req->status));
3932 kfree_skb(skb);
3933 return 0;
3934 }
3935 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
3936 ep->com.state);
3937
3938 /*
3939 * Wake up any threads in rdma_init() or rdma_fini().
3940 * However, if we are on MPAv2 and want to retry with MPAv1
3941 * then, don't wake up yet.
3942 */
3943 if (mpa_rev == 2 && !ep->tried_with_mpa_v1) {
3944 if (ep->com.state != MPA_REQ_SENT)
3945 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
3946 } else
3947 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
3948 sched(dev, skb);
3949 return 0;
3950 }
3951
3952 /*
3953 * Most upcalls from the T4 Core go to sched() to
3954 * schedule the processing on a work queue.
3955 */
3956 c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
3957 [CPL_ACT_ESTABLISH] = sched,
3958 [CPL_ACT_OPEN_RPL] = sched,
3959 [CPL_RX_DATA] = sched,
3960 [CPL_ABORT_RPL_RSS] = sched,
3961 [CPL_ABORT_RPL] = sched,
3962 [CPL_PASS_OPEN_RPL] = sched,
3963 [CPL_CLOSE_LISTSRV_RPL] = sched,
3964 [CPL_PASS_ACCEPT_REQ] = sched,
3965 [CPL_PASS_ESTABLISH] = sched,
3966 [CPL_PEER_CLOSE] = sched,
3967 [CPL_CLOSE_CON_RPL] = sched,
3968 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
3969 [CPL_RDMA_TERMINATE] = sched,
3970 [CPL_FW4_ACK] = sched,
3971 [CPL_SET_TCB_RPL] = set_tcb_rpl,
3972 [CPL_FW6_MSG] = fw6_msg,
3973 [CPL_RX_PKT] = sched
3974 };
3975
c4iw_cm_init(void)3976 int __init c4iw_cm_init(void)
3977 {
3978 spin_lock_init(&timeout_lock);
3979 skb_queue_head_init(&rxq);
3980
3981 workq = create_singlethread_workqueue("iw_cxgb4");
3982 if (!workq)
3983 return -ENOMEM;
3984
3985 return 0;
3986 }
3987
c4iw_cm_term(void)3988 void c4iw_cm_term(void)
3989 {
3990 WARN_ON(!list_empty(&timeout_list));
3991 flush_workqueue(workq);
3992 destroy_workqueue(workq);
3993 }
3994