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RDMA/cxgb4: Lock around accept/reject downcalls
[linux-2.6-block.git] / drivers / infiniband / hw / cxgb4 / cm.c
CommitLineData
cfdda9d7
SW		 1/*
2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32#include <linux/module.h>
33#include <linux/list.h>
34#include <linux/workqueue.h>
35#include <linux/skbuff.h>
36#include <linux/timer.h>
37#include <linux/notifier.h>
38#include <linux/inetdevice.h>
39#include <linux/ip.h>
40#include <linux/tcp.h>
1cab775c 41#include <linux/if_vlan.h>
cfdda9d7
SW		 42
43#include <net/neighbour.h>
44#include <net/netevent.h>
45#include <net/route.h>
1cab775c 46#include <net/tcp.h>
830662f6
VP		 47#include <net/ip6_route.h>
48#include <net/addrconf.h>
cfdda9d7
SW		 49
50#include "iw_cxgb4.h"
51
52static char *states[] = {
53 "idle",
54 "listen",
55 "connecting",
56 "mpa_wait_req",
57 "mpa_req_sent",
58 "mpa_req_rcvd",
59 "mpa_rep_sent",
60 "fpdu_mode",
61 "aborting",
62 "closing",
63 "moribund",
64 "dead",
65 NULL,
66};
67
5be78ee9
VP		 68static int nocong;
69module_param(nocong, int, 0644);
70MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
71
72static int enable_ecn;
73module_param(enable_ecn, int, 0644);
74MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
75
b52fe09e 76static int dack_mode = 1;
ba6d3925 77module_param(dack_mode, int, 0644);
b52fe09e 78MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
ba6d3925 79
be4c9bad
RD		 80int c4iw_max_read_depth = 8;
81module_param(c4iw_max_read_depth, int, 0644);
82MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)");
83
cfdda9d7
SW		 84static int enable_tcp_timestamps;
85module_param(enable_tcp_timestamps, int, 0644);
86MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
87
88static int enable_tcp_sack;
89module_param(enable_tcp_sack, int, 0644);
90MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
91
92static int enable_tcp_window_scaling = 1;
93module_param(enable_tcp_window_scaling, int, 0644);
94MODULE_PARM_DESC(enable_tcp_window_scaling,
95 "Enable tcp window scaling (default=1)");
96
97int c4iw_debug;
98module_param(c4iw_debug, int, 0644);
99MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
100
df2d5130 101static int peer2peer = 1;
cfdda9d7 102module_param(peer2peer, int, 0644);
df2d5130 103MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
cfdda9d7
SW		 104
105static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
106module_param(p2p_type, int, 0644);
107MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
108 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
109
110static int ep_timeout_secs = 60;
111module_param(ep_timeout_secs, int, 0644);
112MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
113 "in seconds (default=60)");
114
115static int mpa_rev = 1;
116module_param(mpa_rev, int, 0644);
117MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
d2fe99e8
KS		 118 "1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft"
119 " compliant (default=1)");
cfdda9d7
SW		 120
121static int markers_enabled;
122module_param(markers_enabled, int, 0644);
123MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
124
125static int crc_enabled = 1;
126module_param(crc_enabled, int, 0644);
127MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
128
129static int rcv_win = 256 * 1024;
130module_param(rcv_win, int, 0644);
131MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
132
98ae68b7 133static int snd_win = 128 * 1024;
cfdda9d7 134module_param(snd_win, int, 0644);
98ae68b7 135MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
cfdda9d7 136
cfdda9d7 137static struct workqueue_struct *workq;
cfdda9d7
SW		 138
139static struct sk_buff_head rxq;
cfdda9d7
SW		 140
141static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
142static void ep_timeout(unsigned long arg);
143static void connect_reply_upcall(struct c4iw_ep *ep, int status);
144
be4c9bad
RD		 145static LIST_HEAD(timeout_list);
146static spinlock_t timeout_lock;
147
325abead
VP		 148static void deref_qp(struct c4iw_ep *ep)
149{
150 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
151 clear_bit(QP_REFERENCED, &ep->com.flags);
152}
153
154static void ref_qp(struct c4iw_ep *ep)
155{
156 set_bit(QP_REFERENCED, &ep->com.flags);
157 c4iw_qp_add_ref(&ep->com.qp->ibqp);
158}
159
cfdda9d7
SW		 160static void start_ep_timer(struct c4iw_ep *ep)
161{
162 PDBG("%s ep %p\n", __func__, ep);
163 if (timer_pending(&ep->timer)) {
1ec779cc
VP		 164 pr_err("%s timer already started! ep %p\n",
165 __func__, ep);
166 return;
167 }
168 clear_bit(TIMEOUT, &ep->com.flags);
169 c4iw_get_ep(&ep->com);
cfdda9d7
SW		 170 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
171 ep->timer.data = (unsigned long)ep;
172 ep->timer.function = ep_timeout;
173 add_timer(&ep->timer);
174}
175
176static void stop_ep_timer(struct c4iw_ep *ep)
177{
1ec779cc 178 PDBG("%s ep %p stopping\n", __func__, ep);
cfdda9d7 179 del_timer_sync(&ep->timer);
1ec779cc
VP		 180 if (!test_and_set_bit(TIMEOUT, &ep->com.flags))
181 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 182}
183
184static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
185 struct l2t_entry *l2e)
186{
187 int error = 0;
188
189 if (c4iw_fatal_error(rdev)) {
190 kfree_skb(skb);
191 PDBG("%s - device in error state - dropping\n", __func__);
192 return -EIO;
193 }
194 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
195 if (error < 0)
196 kfree_skb(skb);
74594861 197 return error < 0 ? error : 0;
cfdda9d7
SW		 198}
199
200int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
201{
202 int error = 0;
203
204 if (c4iw_fatal_error(rdev)) {
205 kfree_skb(skb);
206 PDBG("%s - device in error state - dropping\n", __func__);
207 return -EIO;
208 }
209 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
210 if (error < 0)
211 kfree_skb(skb);
74594861 212 return error < 0 ? error : 0;
cfdda9d7
SW		 213}
214
215static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
216{
217 struct cpl_tid_release *req;
218
219 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
220 if (!skb)
221 return;
222 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
223 INIT_TP_WR(req, hwtid);
224 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
225 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
226 c4iw_ofld_send(rdev, skb);
227 return;
228}
229
230static void set_emss(struct c4iw_ep *ep, u16 opt)
231{
232 ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
233 ep->mss = ep->emss;
234 if (GET_TCPOPT_TSTAMP(opt))
235 ep->emss -= 12;
236 if (ep->emss < 128)
237 ep->emss = 128;
238 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
239 ep->mss, ep->emss);
240}
241
242static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
243{
cfdda9d7
SW		 244 enum c4iw_ep_state state;
245
2f5b48c3 246 mutex_lock(&epc->mutex);
cfdda9d7 247 state = epc->state;
2f5b48c3 248 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 249 return state;
250}
251
252static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
253{
254 epc->state = new;
255}
256
257static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
258{
2f5b48c3 259 mutex_lock(&epc->mutex);
cfdda9d7
SW		 260 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
261 __state_set(epc, new);
2f5b48c3 262 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 263 return;
264}
265
266static void *alloc_ep(int size, gfp_t gfp)
267{
268 struct c4iw_ep_common *epc;
269
270 epc = kzalloc(size, gfp);
271 if (epc) {
272 kref_init(&epc->kref);
2f5b48c3 273 mutex_init(&epc->mutex);
aadc4df3 274 c4iw_init_wr_wait(&epc->wr_wait);
cfdda9d7
SW		 275 }
276 PDBG("%s alloc ep %p\n", __func__, epc);
277 return epc;
278}
279
280void _c4iw_free_ep(struct kref *kref)
281{
282 struct c4iw_ep *ep;
283
284 ep = container_of(kref, struct c4iw_ep, com.kref);
285 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
325abead
VP		 286 if (test_bit(QP_REFERENCED, &ep->com.flags))
287 deref_qp(ep);
cfdda9d7 288 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
fe7e0a4d 289 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
cfdda9d7
SW		 290 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
291 dst_release(ep->dst);
292 cxgb4_l2t_release(ep->l2t);
293 }
294 kfree(ep);
295}
296
297static void release_ep_resources(struct c4iw_ep *ep)
298{
299 set_bit(RELEASE_RESOURCES, &ep->com.flags);
300 c4iw_put_ep(&ep->com);
301}
302
cfdda9d7
SW		 303static int status2errno(int status)
304{
305 switch (status) {
306 case CPL_ERR_NONE:
307 return 0;
308 case CPL_ERR_CONN_RESET:
309 return -ECONNRESET;
310 case CPL_ERR_ARP_MISS:
311 return -EHOSTUNREACH;
312 case CPL_ERR_CONN_TIMEDOUT:
313 return -ETIMEDOUT;
314 case CPL_ERR_TCAM_FULL:
315 return -ENOMEM;
316 case CPL_ERR_CONN_EXIST:
317 return -EADDRINUSE;
318 default:
319 return -EIO;
320 }
321}
322
323/*
324 * Try and reuse skbs already allocated...
325 */
326static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
327{
328 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
329 skb_trim(skb, 0);
330 skb_get(skb);
331 skb_reset_transport_header(skb);
332 } else {
333 skb = alloc_skb(len, gfp);
334 }
b38a0ad8 335 t4_set_arp_err_handler(skb, NULL, NULL);
cfdda9d7
SW		 336 return skb;
337}
338
830662f6
VP		 339static struct net_device *get_real_dev(struct net_device *egress_dev)
340{
341 struct net_device *phys_dev = egress_dev;
342 if (egress_dev->priv_flags & IFF_802_1Q_VLAN)
343 phys_dev = vlan_dev_real_dev(egress_dev);
344 return phys_dev;
345}
346
347static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
348{
349 int i;
350
351 egress_dev = get_real_dev(egress_dev);
352 for (i = 0; i < dev->rdev.lldi.nports; i++)
353 if (dev->rdev.lldi.ports[i] == egress_dev)
354 return 1;
355 return 0;
356}
357
358static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
359 __u8 *peer_ip, __be16 local_port,
360 __be16 peer_port, u8 tos,
361 __u32 sin6_scope_id)
362{
363 struct dst_entry *dst = NULL;
364
365 if (IS_ENABLED(CONFIG_IPV6)) {
366 struct flowi6 fl6;
367
368 memset(&fl6, 0, sizeof(fl6));
369 memcpy(&fl6.daddr, peer_ip, 16);
370 memcpy(&fl6.saddr, local_ip, 16);
371 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
372 fl6.flowi6_oif = sin6_scope_id;
373 dst = ip6_route_output(&init_net, NULL, &fl6);
374 if (!dst)
375 goto out;
376 if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
377 !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
378 dst_release(dst);
379 dst = NULL;
380 }
381 }
382
383out:
384 return dst;
385}
386
387static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip,
cfdda9d7
SW		 388 __be32 peer_ip, __be16 local_port,
389 __be16 peer_port, u8 tos)
390{
391 struct rtable *rt;
31e4543d 392 struct flowi4 fl4;
830662f6 393 struct neighbour *n;
78fbfd8a 394
31e4543d 395 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
78fbfd8a
DM		 396 peer_port, local_port, IPPROTO_TCP,
397 tos, 0);
b23dd4fe 398 if (IS_ERR(rt))
cfdda9d7 399 return NULL;
830662f6
VP		 400 n = dst_neigh_lookup(&rt->dst, &peer_ip);
401 if (!n)
402 return NULL;
f8e81908
SW		 403 if (!our_interface(dev, n->dev) &&
404 !(n->dev->flags & IFF_LOOPBACK)) {
830662f6
VP		 405 dst_release(&rt->dst);
406 return NULL;
407 }
408 neigh_release(n);
409 return &rt->dst;
cfdda9d7
SW		 410}
411
412static void arp_failure_discard(void *handle, struct sk_buff *skb)
413{
414 PDBG("%s c4iw_dev %p\n", __func__, handle);
415 kfree_skb(skb);
416}
417
418/*
419 * Handle an ARP failure for an active open.
420 */
421static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
422{
423 printk(KERN_ERR MOD "ARP failure duing connect\n");
424 kfree_skb(skb);
425}
426
427/*
428 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
429 * and send it along.
430 */
431static void abort_arp_failure(void *handle, struct sk_buff *skb)
432{
433 struct c4iw_rdev *rdev = handle;
434 struct cpl_abort_req *req = cplhdr(skb);
435
436 PDBG("%s rdev %p\n", __func__, rdev);
437 req->cmd = CPL_ABORT_NO_RST;
438 c4iw_ofld_send(rdev, skb);
439}
440
441static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
442{
443 unsigned int flowclen = 80;
444 struct fw_flowc_wr *flowc;
445 int i;
446
447 skb = get_skb(skb, flowclen, GFP_KERNEL);
448 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
449
450 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
451 FW_FLOWC_WR_NPARAMS(8));
452 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
453 16)) | FW_WR_FLOWID(ep->hwtid));
454
455 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
94788657 456 flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8);
cfdda9d7
SW		 457 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
458 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
459 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
460 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
461 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
462 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
463 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
464 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
465 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
466 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
467 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
468 flowc->mnemval[6].val = cpu_to_be32(snd_win);
469 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
470 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
471 /* Pad WR to 16 byte boundary */
472 flowc->mnemval[8].mnemonic = 0;
473 flowc->mnemval[8].val = 0;
474 for (i = 0; i < 9; i++) {
475 flowc->mnemval[i].r4[0] = 0;
476 flowc->mnemval[i].r4[1] = 0;
477 flowc->mnemval[i].r4[2] = 0;
478 }
479
480 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
481 c4iw_ofld_send(&ep->com.dev->rdev, skb);
482}
483
484static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
485{
486 struct cpl_close_con_req *req;
487 struct sk_buff *skb;
488 int wrlen = roundup(sizeof *req, 16);
489
490 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
491 skb = get_skb(NULL, wrlen, gfp);
492 if (!skb) {
493 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
494 return -ENOMEM;
495 }
496 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
497 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
498 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
499 memset(req, 0, wrlen);
500 INIT_TP_WR(req, ep->hwtid);
501 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
502 ep->hwtid));
503 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
504}
505
506static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
507{
508 struct cpl_abort_req *req;
509 int wrlen = roundup(sizeof *req, 16);
510
511 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
512 skb = get_skb(skb, wrlen, gfp);
513 if (!skb) {
514 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
515 __func__);
516 return -ENOMEM;
517 }
518 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
519 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
520 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
521 memset(req, 0, wrlen);
522 INIT_TP_WR(req, ep->hwtid);
523 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
524 req->cmd = CPL_ABORT_SEND_RST;
525 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
526}
527
528static int send_connect(struct c4iw_ep *ep)
529{
530 struct cpl_act_open_req *req;
f079af7a 531 struct cpl_t5_act_open_req *t5_req;
830662f6
VP		 532 struct cpl_act_open_req6 *req6;
533 struct cpl_t5_act_open_req6 *t5_req6;
cfdda9d7
SW		 534 struct sk_buff *skb;
535 u64 opt0;
536 u32 opt2;
537 unsigned int mtu_idx;
538 int wscale;
830662f6
VP		 539 int wrlen;
540 int sizev4 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
541 sizeof(struct cpl_act_open_req) :
542 sizeof(struct cpl_t5_act_open_req);
543 int sizev6 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
544 sizeof(struct cpl_act_open_req6) :
545 sizeof(struct cpl_t5_act_open_req6);
546 struct sockaddr_in *la = (struct sockaddr_in *)&ep->com.local_addr;
547 struct sockaddr_in *ra = (struct sockaddr_in *)&ep->com.remote_addr;
548 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
549 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
550
551 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
552 roundup(sizev4, 16) :
553 roundup(sizev6, 16);
cfdda9d7
SW		 554
555 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
556
557 skb = get_skb(NULL, wrlen, GFP_KERNEL);
558 if (!skb) {
559 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
560 __func__);
561 return -ENOMEM;
562 }
d4f1a5c6 563 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
cfdda9d7
SW		 564
565 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
566 wscale = compute_wscale(rcv_win);
5be78ee9
VP		 567 opt0 = (nocong ? NO_CONG(1) : 0) |
568 KEEP_ALIVE(1) |
ba6d3925 569 DELACK(1) |
cfdda9d7
SW		 570 WND_SCALE(wscale) |
571 MSS_IDX(mtu_idx) |
572 L2T_IDX(ep->l2t->idx) |
573 TX_CHAN(ep->tx_chan) |
574 SMAC_SEL(ep->smac_idx) |
575 DSCP(ep->tos) |
b48f3b9c 576 ULP_MODE(ULP_MODE_TCPDDP) |
cfdda9d7
SW		 577 RCV_BUFSIZ(rcv_win>>10);
578 opt2 = RX_CHANNEL(0) |
5be78ee9 579 CCTRL_ECN(enable_ecn) |
cfdda9d7
SW		 580 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
581 if (enable_tcp_timestamps)
582 opt2 |= TSTAMPS_EN(1);
583 if (enable_tcp_sack)
584 opt2 |= SACK_EN(1);
585 if (wscale && enable_tcp_window_scaling)
586 opt2 |= WND_SCALE_EN(1);
587 t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
588
f079af7a 589 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
830662f6
VP		 590 if (ep->com.remote_addr.ss_family == AF_INET) {
591 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
592 INIT_TP_WR(req, 0);
593 OPCODE_TID(req) = cpu_to_be32(
594 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
595 ((ep->rss_qid << 14) | ep->atid)));
596 req->local_port = la->sin_port;
597 req->peer_port = ra->sin_port;
598 req->local_ip = la->sin_addr.s_addr;
599 req->peer_ip = ra->sin_addr.s_addr;
600 req->opt0 = cpu_to_be64(opt0);
41b4f86c
KS		 601 req->params = cpu_to_be32(cxgb4_select_ntuple(
602 ep->com.dev->rdev.lldi.ports[0],
603 ep->l2t));
830662f6
VP		 604 req->opt2 = cpu_to_be32(opt2);
605 } else {
606 req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
607
608 INIT_TP_WR(req6, 0);
609 OPCODE_TID(req6) = cpu_to_be32(
610 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
611 ((ep->rss_qid<<14)|ep->atid)));
612 req6->local_port = la6->sin6_port;
613 req6->peer_port = ra6->sin6_port;
614 req6->local_ip_hi = *((__be64 *)
615 (la6->sin6_addr.s6_addr));
616 req6->local_ip_lo = *((__be64 *)
617 (la6->sin6_addr.s6_addr + 8));
618 req6->peer_ip_hi = *((__be64 *)
619 (ra6->sin6_addr.s6_addr));
620 req6->peer_ip_lo = *((__be64 *)
621 (ra6->sin6_addr.s6_addr + 8));
622 req6->opt0 = cpu_to_be64(opt0);
41b4f86c
KS		 623 req6->params = cpu_to_be32(cxgb4_select_ntuple(
624 ep->com.dev->rdev.lldi.ports[0],
625 ep->l2t));
830662f6
VP		 626 req6->opt2 = cpu_to_be32(opt2);
627 }
f079af7a 628 } else {
830662f6
VP		 629 if (ep->com.remote_addr.ss_family == AF_INET) {
630 t5_req = (struct cpl_t5_act_open_req *)
631 skb_put(skb, wrlen);
632 INIT_TP_WR(t5_req, 0);
633 OPCODE_TID(t5_req) = cpu_to_be32(
f079af7a
VP		 634 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
635 ((ep->rss_qid << 14) | ep->atid)));
830662f6
VP		 636 t5_req->local_port = la->sin_port;
637 t5_req->peer_port = ra->sin_port;
638 t5_req->local_ip = la->sin_addr.s_addr;
639 t5_req->peer_ip = ra->sin_addr.s_addr;
640 t5_req->opt0 = cpu_to_be64(opt0);
641 t5_req->params = cpu_to_be64(V_FILTER_TUPLE(
41b4f86c
KS		 642 cxgb4_select_ntuple(
643 ep->com.dev->rdev.lldi.ports[0],
644 ep->l2t)));
830662f6
VP		 645 t5_req->opt2 = cpu_to_be32(opt2);
646 } else {
647 t5_req6 = (struct cpl_t5_act_open_req6 *)
648 skb_put(skb, wrlen);
649 INIT_TP_WR(t5_req6, 0);
650 OPCODE_TID(t5_req6) = cpu_to_be32(
651 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
652 ((ep->rss_qid<<14)|ep->atid)));
653 t5_req6->local_port = la6->sin6_port;
654 t5_req6->peer_port = ra6->sin6_port;
655 t5_req6->local_ip_hi = *((__be64 *)
656 (la6->sin6_addr.s6_addr));
657 t5_req6->local_ip_lo = *((__be64 *)
658 (la6->sin6_addr.s6_addr + 8));
659 t5_req6->peer_ip_hi = *((__be64 *)
660 (ra6->sin6_addr.s6_addr));
661 t5_req6->peer_ip_lo = *((__be64 *)
662 (ra6->sin6_addr.s6_addr + 8));
663 t5_req6->opt0 = cpu_to_be64(opt0);
664 t5_req6->params = (__force __be64)cpu_to_be32(
41b4f86c
KS		 665 cxgb4_select_ntuple(
666 ep->com.dev->rdev.lldi.ports[0],
667 ep->l2t));
830662f6
VP		 668 t5_req6->opt2 = cpu_to_be32(opt2);
669 }
f079af7a
VP		 670 }
671
793dad94 672 set_bit(ACT_OPEN_REQ, &ep->com.history);
cfdda9d7
SW		 673 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
674}
675
d2fe99e8
KS		 676static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
677 u8 mpa_rev_to_use)
cfdda9d7
SW		 678{
679 int mpalen, wrlen;
680 struct fw_ofld_tx_data_wr *req;
681 struct mpa_message *mpa;
d2fe99e8 682 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7
SW		 683
684 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
685
686 BUG_ON(skb_cloned(skb));
687
688 mpalen = sizeof(*mpa) + ep->plen;
d2fe99e8
KS		 689 if (mpa_rev_to_use == 2)
690 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 691 wrlen = roundup(mpalen + sizeof *req, 16);
692 skb = get_skb(skb, wrlen, GFP_KERNEL);
693 if (!skb) {
694 connect_reply_upcall(ep, -ENOMEM);
695 return;
696 }
697 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
698
699 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
700 memset(req, 0, wrlen);
701 req->op_to_immdlen = cpu_to_be32(
702 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
703 FW_WR_COMPL(1) |
704 FW_WR_IMMDLEN(mpalen));
705 req->flowid_len16 = cpu_to_be32(
706 FW_WR_FLOWID(ep->hwtid) |
707 FW_WR_LEN16(wrlen >> 4));
708 req->plen = cpu_to_be32(mpalen);
709 req->tunnel_to_proxy = cpu_to_be32(
710 FW_OFLD_TX_DATA_WR_FLUSH(1) |
711 FW_OFLD_TX_DATA_WR_SHOVE(1));
712
713 mpa = (struct mpa_message *)(req + 1);
714 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
715 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
d2fe99e8
KS		 716 (markers_enabled ? MPA_MARKERS : 0) |
717 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
cfdda9d7 718 mpa->private_data_size = htons(ep->plen);
d2fe99e8 719 mpa->revision = mpa_rev_to_use;
01b225e1 720 if (mpa_rev_to_use == 1) {
d2fe99e8 721 ep->tried_with_mpa_v1 = 1;
01b225e1
KS		 722 ep->retry_with_mpa_v1 = 0;
723 }
d2fe99e8
KS		 724
725 if (mpa_rev_to_use == 2) {
f747c34a
RD		 726 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
727 sizeof (struct mpa_v2_conn_params));
d2fe99e8
KS		 728 mpa_v2_params.ird = htons((u16)ep->ird);
729 mpa_v2_params.ord = htons((u16)ep->ord);
730
731 if (peer2peer) {
732 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
733 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
734 mpa_v2_params.ord |=
735 htons(MPA_V2_RDMA_WRITE_RTR);
736 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
737 mpa_v2_params.ord |=
738 htons(MPA_V2_RDMA_READ_RTR);
739 }
740 memcpy(mpa->private_data, &mpa_v2_params,
741 sizeof(struct mpa_v2_conn_params));
cfdda9d7 742
d2fe99e8
KS		 743 if (ep->plen)
744 memcpy(mpa->private_data +
745 sizeof(struct mpa_v2_conn_params),
746 ep->mpa_pkt + sizeof(*mpa), ep->plen);
747 } else
748 if (ep->plen)
749 memcpy(mpa->private_data,
750 ep->mpa_pkt + sizeof(*mpa), ep->plen);
cfdda9d7
SW		 751
752 /*
753 * Reference the mpa skb. This ensures the data area
754 * will remain in memory until the hw acks the tx.
755 * Function fw4_ack() will deref it.
756 */
757 skb_get(skb);
758 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
759 BUG_ON(ep->mpa_skb);
760 ep->mpa_skb = skb;
761 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
762 start_ep_timer(ep);
a7db89eb 763 __state_set(&ep->com, MPA_REQ_SENT);
cfdda9d7 764 ep->mpa_attr.initiator = 1;
9c88aa00 765 ep->snd_seq += mpalen;
cfdda9d7
SW		 766 return;
767}
768
769static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
770{
771 int mpalen, wrlen;
772 struct fw_ofld_tx_data_wr *req;
773 struct mpa_message *mpa;
774 struct sk_buff *skb;
d2fe99e8 775 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7
SW		 776
777 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
778
779 mpalen = sizeof(*mpa) + plen;
d2fe99e8
KS		 780 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
781 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 782 wrlen = roundup(mpalen + sizeof *req, 16);
783
784 skb = get_skb(NULL, wrlen, GFP_KERNEL);
785 if (!skb) {
786 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
787 return -ENOMEM;
788 }
789 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
790
791 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
792 memset(req, 0, wrlen);
793 req->op_to_immdlen = cpu_to_be32(
794 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
795 FW_WR_COMPL(1) |
796 FW_WR_IMMDLEN(mpalen));
797 req->flowid_len16 = cpu_to_be32(
798 FW_WR_FLOWID(ep->hwtid) |
799 FW_WR_LEN16(wrlen >> 4));
800 req->plen = cpu_to_be32(mpalen);
801 req->tunnel_to_proxy = cpu_to_be32(
802 FW_OFLD_TX_DATA_WR_FLUSH(1) |
803 FW_OFLD_TX_DATA_WR_SHOVE(1));
804
805 mpa = (struct mpa_message *)(req + 1);
806 memset(mpa, 0, sizeof(*mpa));
807 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
808 mpa->flags = MPA_REJECT;
fe7e0a4d 809 mpa->revision = ep->mpa_attr.version;
cfdda9d7 810 mpa->private_data_size = htons(plen);
d2fe99e8
KS		 811
812 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
813 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
f747c34a
RD		 814 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
815 sizeof (struct mpa_v2_conn_params));
d2fe99e8
KS		 816 mpa_v2_params.ird = htons(((u16)ep->ird) |
817 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
818 0));
819 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
820 (p2p_type ==
821 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
822 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
823 FW_RI_INIT_P2PTYPE_READ_REQ ?
824 MPA_V2_RDMA_READ_RTR : 0) : 0));
825 memcpy(mpa->private_data, &mpa_v2_params,
826 sizeof(struct mpa_v2_conn_params));
827
828 if (ep->plen)
829 memcpy(mpa->private_data +
830 sizeof(struct mpa_v2_conn_params), pdata, plen);
831 } else
832 if (plen)
833 memcpy(mpa->private_data, pdata, plen);
cfdda9d7
SW		 834
835 /*
836 * Reference the mpa skb again. This ensures the data area
837 * will remain in memory until the hw acks the tx.
838 * Function fw4_ack() will deref it.
839 */
840 skb_get(skb);
841 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
842 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
843 BUG_ON(ep->mpa_skb);
844 ep->mpa_skb = skb;
9c88aa00 845 ep->snd_seq += mpalen;
cfdda9d7
SW		 846 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
847}
848
849static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
850{
851 int mpalen, wrlen;
852 struct fw_ofld_tx_data_wr *req;
853 struct mpa_message *mpa;
854 struct sk_buff *skb;
d2fe99e8 855 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7
SW		 856
857 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
858
859 mpalen = sizeof(*mpa) + plen;
d2fe99e8
KS		 860 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
861 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 862 wrlen = roundup(mpalen + sizeof *req, 16);
863
864 skb = get_skb(NULL, wrlen, GFP_KERNEL);
865 if (!skb) {
866 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
867 return -ENOMEM;
868 }
869 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
870
871 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
872 memset(req, 0, wrlen);
873 req->op_to_immdlen = cpu_to_be32(
874 FW_WR_OP(FW_OFLD_TX_DATA_WR) |
875 FW_WR_COMPL(1) |
876 FW_WR_IMMDLEN(mpalen));
877 req->flowid_len16 = cpu_to_be32(
878 FW_WR_FLOWID(ep->hwtid) |
879 FW_WR_LEN16(wrlen >> 4));
880 req->plen = cpu_to_be32(mpalen);
881 req->tunnel_to_proxy = cpu_to_be32(
882 FW_OFLD_TX_DATA_WR_FLUSH(1) |
883 FW_OFLD_TX_DATA_WR_SHOVE(1));
884
885 mpa = (struct mpa_message *)(req + 1);
886 memset(mpa, 0, sizeof(*mpa));
887 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
888 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
889 (markers_enabled ? MPA_MARKERS : 0);
d2fe99e8 890 mpa->revision = ep->mpa_attr.version;
cfdda9d7 891 mpa->private_data_size = htons(plen);
d2fe99e8
KS		 892
893 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
894 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
f747c34a
RD		 895 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
896 sizeof (struct mpa_v2_conn_params));
d2fe99e8
KS		 897 mpa_v2_params.ird = htons((u16)ep->ird);
898 mpa_v2_params.ord = htons((u16)ep->ord);
899 if (peer2peer && (ep->mpa_attr.p2p_type !=
900 FW_RI_INIT_P2PTYPE_DISABLED)) {
901 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
902
903 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
904 mpa_v2_params.ord |=
905 htons(MPA_V2_RDMA_WRITE_RTR);
906 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
907 mpa_v2_params.ord |=
908 htons(MPA_V2_RDMA_READ_RTR);
909 }
910
911 memcpy(mpa->private_data, &mpa_v2_params,
912 sizeof(struct mpa_v2_conn_params));
913
914 if (ep->plen)
915 memcpy(mpa->private_data +
916 sizeof(struct mpa_v2_conn_params), pdata, plen);
917 } else
918 if (plen)
919 memcpy(mpa->private_data, pdata, plen);
cfdda9d7
SW		 920
921 /*
922 * Reference the mpa skb. This ensures the data area
923 * will remain in memory until the hw acks the tx.
924 * Function fw4_ack() will deref it.
925 */
926 skb_get(skb);
927 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
928 ep->mpa_skb = skb;
a7db89eb 929 __state_set(&ep->com, MPA_REP_SENT);
9c88aa00 930 ep->snd_seq += mpalen;
cfdda9d7
SW		 931 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
932}
933
934static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
935{
936 struct c4iw_ep *ep;
937 struct cpl_act_establish *req = cplhdr(skb);
938 unsigned int tid = GET_TID(req);
939 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
940 struct tid_info *t = dev->rdev.lldi.tids;
941
942 ep = lookup_atid(t, atid);
943
944 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
945 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
946
a7db89eb 947 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 948 dst_confirm(ep->dst);
949
950 /* setup the hwtid for this connection */
951 ep->hwtid = tid;
952 cxgb4_insert_tid(t, ep, tid);
793dad94 953 insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
cfdda9d7
SW		 954
955 ep->snd_seq = be32_to_cpu(req->snd_isn);
956 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
957
958 set_emss(ep, ntohs(req->tcp_opt));
959
960 /* dealloc the atid */
793dad94 961 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
cfdda9d7 962 cxgb4_free_atid(t, atid);
793dad94 963 set_bit(ACT_ESTAB, &ep->com.history);
cfdda9d7
SW		 964
965 /* start MPA negotiation */
966 send_flowc(ep, NULL);
d2fe99e8
KS		 967 if (ep->retry_with_mpa_v1)
968 send_mpa_req(ep, skb, 1);
969 else
970 send_mpa_req(ep, skb, mpa_rev);
a7db89eb 971 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 972 return 0;
973}
974
be13b2df 975static void close_complete_upcall(struct c4iw_ep *ep, int status)
cfdda9d7
SW		 976{
977 struct iw_cm_event event;
978
979 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
980 memset(&event, 0, sizeof(event));
981 event.event = IW_CM_EVENT_CLOSE;
be13b2df 982 event.status = status;
cfdda9d7
SW		 983 if (ep->com.cm_id) {
984 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
985 ep, ep->com.cm_id, ep->hwtid);
986 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
987 ep->com.cm_id->rem_ref(ep->com.cm_id);
988 ep->com.cm_id = NULL;
793dad94 989 set_bit(CLOSE_UPCALL, &ep->com.history);
cfdda9d7
SW		 990 }
991}
992
993static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
994{
995 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cfdda9d7 996 state_set(&ep->com, ABORTING);
793dad94 997 set_bit(ABORT_CONN, &ep->com.history);
cfdda9d7
SW		 998 return send_abort(ep, skb, gfp);
999}
1000
1001static void peer_close_upcall(struct c4iw_ep *ep)
1002{
1003 struct iw_cm_event event;
1004
1005 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1006 memset(&event, 0, sizeof(event));
1007 event.event = IW_CM_EVENT_DISCONNECT;
1008 if (ep->com.cm_id) {
1009 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
1010 ep, ep->com.cm_id, ep->hwtid);
1011 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
793dad94 1012 set_bit(DISCONN_UPCALL, &ep->com.history);
cfdda9d7
SW		 1013 }
1014}
1015
1016static void peer_abort_upcall(struct c4iw_ep *ep)
1017{
1018 struct iw_cm_event event;
1019
1020 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1021 memset(&event, 0, sizeof(event));
1022 event.event = IW_CM_EVENT_CLOSE;
1023 event.status = -ECONNRESET;
1024 if (ep->com.cm_id) {
1025 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
1026 ep->com.cm_id, ep->hwtid);
1027 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1028 ep->com.cm_id->rem_ref(ep->com.cm_id);
1029 ep->com.cm_id = NULL;
793dad94 1030 set_bit(ABORT_UPCALL, &ep->com.history);
cfdda9d7
SW		 1031 }
1032}
1033
1034static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1035{
1036 struct iw_cm_event event;
1037
1038 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
1039 memset(&event, 0, sizeof(event));
1040 event.event = IW_CM_EVENT_CONNECT_REPLY;
1041 event.status = status;
24d44a39
SW		 1042 memcpy(&event.local_addr, &ep->com.local_addr,
1043 sizeof(ep->com.local_addr));
1044 memcpy(&event.remote_addr, &ep->com.remote_addr,
1045 sizeof(ep->com.remote_addr));
cfdda9d7
SW		 1046
1047 if ((status == 0) || (status == -ECONNREFUSED)) {
d2fe99e8
KS		 1048 if (!ep->tried_with_mpa_v1) {
1049 /* this means MPA_v2 is used */
1050 event.private_data_len = ep->plen -
1051 sizeof(struct mpa_v2_conn_params);
1052 event.private_data = ep->mpa_pkt +
1053 sizeof(struct mpa_message) +
1054 sizeof(struct mpa_v2_conn_params);
1055 } else {
1056 /* this means MPA_v1 is used */
1057 event.private_data_len = ep->plen;
1058 event.private_data = ep->mpa_pkt +
1059 sizeof(struct mpa_message);
1060 }
cfdda9d7 1061 }
85963e4c
RD		 1062
1063 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
1064 ep->hwtid, status);
793dad94 1065 set_bit(CONN_RPL_UPCALL, &ep->com.history);
85963e4c
RD		 1066 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1067
cfdda9d7
SW		 1068 if (status < 0) {
1069 ep->com.cm_id->rem_ref(ep->com.cm_id);
1070 ep->com.cm_id = NULL;
cfdda9d7
SW		 1071 }
1072}
1073
be13b2df 1074static int connect_request_upcall(struct c4iw_ep *ep)
cfdda9d7
SW		 1075{
1076 struct iw_cm_event event;
be13b2df 1077 int ret;
cfdda9d7
SW		 1078
1079 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1080 memset(&event, 0, sizeof(event));
1081 event.event = IW_CM_EVENT_CONNECT_REQUEST;
24d44a39
SW		 1082 memcpy(&event.local_addr, &ep->com.local_addr,
1083 sizeof(ep->com.local_addr));
1084 memcpy(&event.remote_addr, &ep->com.remote_addr,
1085 sizeof(ep->com.remote_addr));
cfdda9d7 1086 event.provider_data = ep;
d2fe99e8
KS		 1087 if (!ep->tried_with_mpa_v1) {
1088 /* this means MPA_v2 is used */
1089 event.ord = ep->ord;
1090 event.ird = ep->ird;
1091 event.private_data_len = ep->plen -
1092 sizeof(struct mpa_v2_conn_params);
1093 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1094 sizeof(struct mpa_v2_conn_params);
1095 } else {
1096 /* this means MPA_v1 is used. Send max supported */
1097 event.ord = c4iw_max_read_depth;
1098 event.ird = c4iw_max_read_depth;
1099 event.private_data_len = ep->plen;
1100 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1101 }
be13b2df
SW		 1102 c4iw_get_ep(&ep->com);
1103 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1104 &event);
1105 if (ret)
1106 c4iw_put_ep(&ep->com);
793dad94 1107 set_bit(CONNREQ_UPCALL, &ep->com.history);
cfdda9d7 1108 c4iw_put_ep(&ep->parent_ep->com);
be13b2df 1109 return ret;
cfdda9d7
SW		 1110}
1111
1112static void established_upcall(struct c4iw_ep *ep)
1113{
1114 struct iw_cm_event event;
1115
1116 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1117 memset(&event, 0, sizeof(event));
1118 event.event = IW_CM_EVENT_ESTABLISHED;
d2fe99e8
KS		 1119 event.ird = ep->ird;
1120 event.ord = ep->ord;
cfdda9d7
SW		 1121 if (ep->com.cm_id) {
1122 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1123 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
793dad94 1124 set_bit(ESTAB_UPCALL, &ep->com.history);
cfdda9d7
SW		 1125 }
1126}
1127
1128static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1129{
1130 struct cpl_rx_data_ack *req;
1131 struct sk_buff *skb;
1132 int wrlen = roundup(sizeof *req, 16);
1133
1134 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1135 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1136 if (!skb) {
1137 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
1138 return 0;
1139 }
1140
1141 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
1142 memset(req, 0, wrlen);
1143 INIT_TP_WR(req, ep->hwtid);
1144 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
1145 ep->hwtid));
ba6d3925
SW		 1146 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) |
1147 F_RX_DACK_CHANGE |
1148 V_RX_DACK_MODE(dack_mode));
d4f1a5c6 1149 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
cfdda9d7
SW		 1150 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1151 return credits;
1152}
1153
1154static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
1155{
1156 struct mpa_message *mpa;
d2fe99e8 1157 struct mpa_v2_conn_params *mpa_v2_params;
cfdda9d7 1158 u16 plen;
d2fe99e8
KS		 1159 u16 resp_ird, resp_ord;
1160 u8 rtr_mismatch = 0, insuff_ird = 0;
cfdda9d7
SW		 1161 struct c4iw_qp_attributes attrs;
1162 enum c4iw_qp_attr_mask mask;
1163 int err;
1164
1165 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1166
1167 /*
1168 * Stop mpa timer. If it expired, then the state has
1169 * changed and we bail since ep_timeout already aborted
1170 * the connection.
1171 */
1172 stop_ep_timer(ep);
1173 if (state_read(&ep->com) != MPA_REQ_SENT)
1174 return;
1175
1176 /*
1177 * If we get more than the supported amount of private data
1178 * then we must fail this connection.
1179 */
1180 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1181 err = -EINVAL;
1182 goto err;
1183 }
1184
1185 /*
1186 * copy the new data into our accumulation buffer.
1187 */
1188 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1189 skb->len);
1190 ep->mpa_pkt_len += skb->len;
1191
1192 /*
1193 * if we don't even have the mpa message, then bail.
1194 */
1195 if (ep->mpa_pkt_len < sizeof(*mpa))
1196 return;
1197 mpa = (struct mpa_message *) ep->mpa_pkt;
1198
1199 /* Validate MPA header. */
d2fe99e8
KS		 1200 if (mpa->revision > mpa_rev) {
1201 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1202 " Received = %d\n", __func__, mpa_rev, mpa->revision);
cfdda9d7
SW		 1203 err = -EPROTO;
1204 goto err;
1205 }
1206 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1207 err = -EPROTO;
1208 goto err;
1209 }
1210
1211 plen = ntohs(mpa->private_data_size);
1212
1213 /*
1214 * Fail if there's too much private data.
1215 */
1216 if (plen > MPA_MAX_PRIVATE_DATA) {
1217 err = -EPROTO;
1218 goto err;
1219 }
1220
1221 /*
1222 * If plen does not account for pkt size
1223 */
1224 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1225 err = -EPROTO;
1226 goto err;
1227 }
1228
1229 ep->plen = (u8) plen;
1230
1231 /*
1232 * If we don't have all the pdata yet, then bail.
1233 * We'll continue process when more data arrives.
1234 */
1235 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1236 return;
1237
1238 if (mpa->flags & MPA_REJECT) {
1239 err = -ECONNREFUSED;
1240 goto err;
1241 }
1242
1243 /*
1244 * If we get here we have accumulated the entire mpa
1245 * start reply message including private data. And
1246 * the MPA header is valid.
1247 */
1248 state_set(&ep->com, FPDU_MODE);
1249 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1250 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1251 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
d2fe99e8
KS		 1252 ep->mpa_attr.version = mpa->revision;
1253 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1254
1255 if (mpa->revision == 2) {
1256 ep->mpa_attr.enhanced_rdma_conn =
1257 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1258 if (ep->mpa_attr.enhanced_rdma_conn) {
1259 mpa_v2_params = (struct mpa_v2_conn_params *)
1260 (ep->mpa_pkt + sizeof(*mpa));
1261 resp_ird = ntohs(mpa_v2_params->ird) &
1262 MPA_V2_IRD_ORD_MASK;
1263 resp_ord = ntohs(mpa_v2_params->ord) &
1264 MPA_V2_IRD_ORD_MASK;
1265
1266 /*
1267 * This is a double-check. Ideally, below checks are
1268 * not required since ird/ord stuff has been taken
1269 * care of in c4iw_accept_cr
1270 */
1271 if ((ep->ird < resp_ord) || (ep->ord > resp_ird)) {
1272 err = -ENOMEM;
1273 ep->ird = resp_ord;
1274 ep->ord = resp_ird;
1275 insuff_ird = 1;
1276 }
1277
1278 if (ntohs(mpa_v2_params->ird) &
1279 MPA_V2_PEER2PEER_MODEL) {
1280 if (ntohs(mpa_v2_params->ord) &
1281 MPA_V2_RDMA_WRITE_RTR)
1282 ep->mpa_attr.p2p_type =
1283 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1284 else if (ntohs(mpa_v2_params->ord) &
1285 MPA_V2_RDMA_READ_RTR)
1286 ep->mpa_attr.p2p_type =
1287 FW_RI_INIT_P2PTYPE_READ_REQ;
1288 }
1289 }
1290 } else if (mpa->revision == 1)
1291 if (peer2peer)
1292 ep->mpa_attr.p2p_type = p2p_type;
1293
cfdda9d7 1294 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
d2fe99e8
KS		 1295 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1296 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1297 ep->mpa_attr.recv_marker_enabled,
1298 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1299 ep->mpa_attr.p2p_type, p2p_type);
1300
1301 /*
1302 * If responder's RTR does not match with that of initiator, assign
1303 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1304 * generated when moving QP to RTS state.
1305 * A TERM message will be sent after QP has moved to RTS state
1306 */
91018f86 1307 if ((ep->mpa_attr.version == 2) && peer2peer &&
d2fe99e8
KS		 1308 (ep->mpa_attr.p2p_type != p2p_type)) {
1309 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1310 rtr_mismatch = 1;
1311 }
cfdda9d7
SW		 1312
1313 attrs.mpa_attr = ep->mpa_attr;
1314 attrs.max_ird = ep->ird;
1315 attrs.max_ord = ep->ord;
1316 attrs.llp_stream_handle = ep;
1317 attrs.next_state = C4IW_QP_STATE_RTS;
1318
1319 mask = C4IW_QP_ATTR_NEXT_STATE |
1320 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1321 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1322
1323 /* bind QP and TID with INIT_WR */
1324 err = c4iw_modify_qp(ep->com.qp->rhp,
1325 ep->com.qp, mask, &attrs, 1);
1326 if (err)
1327 goto err;
d2fe99e8
KS		 1328
1329 /*
1330 * If responder's RTR requirement did not match with what initiator
1331 * supports, generate TERM message
1332 */
1333 if (rtr_mismatch) {
1334 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1335 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1336 attrs.ecode = MPA_NOMATCH_RTR;
1337 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1338 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1339 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1340 err = -ENOMEM;
1341 goto out;
1342 }
1343
1344 /*
1345 * Generate TERM if initiator IRD is not sufficient for responder
1346 * provided ORD. Currently, we do the same behaviour even when
1347 * responder provided IRD is also not sufficient as regards to
1348 * initiator ORD.
1349 */
1350 if (insuff_ird) {
1351 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1352 __func__);
1353 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1354 attrs.ecode = MPA_INSUFF_IRD;
1355 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1356 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
1357 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
1358 err = -ENOMEM;
1359 goto out;
1360 }
cfdda9d7
SW		 1361 goto out;
1362err:
b21ef16a
SW		 1363 state_set(&ep->com, ABORTING);
1364 send_abort(ep, skb, GFP_KERNEL);
cfdda9d7
SW		 1365out:
1366 connect_reply_upcall(ep, err);
1367 return;
1368}
1369
1370static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1371{
1372 struct mpa_message *mpa;
d2fe99e8 1373 struct mpa_v2_conn_params *mpa_v2_params;
cfdda9d7
SW		 1374 u16 plen;
1375
1376 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1377
1378 if (state_read(&ep->com) != MPA_REQ_WAIT)
1379 return;
1380
1381 /*
1382 * If we get more than the supported amount of private data
1383 * then we must fail this connection.
1384 */
1385 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1386 stop_ep_timer(ep);
1387 abort_connection(ep, skb, GFP_KERNEL);
1388 return;
1389 }
1390
1391 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1392
1393 /*
1394 * Copy the new data into our accumulation buffer.
1395 */
1396 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1397 skb->len);
1398 ep->mpa_pkt_len += skb->len;
1399
1400 /*
1401 * If we don't even have the mpa message, then bail.
1402 * We'll continue process when more data arrives.
1403 */
1404 if (ep->mpa_pkt_len < sizeof(*mpa))
1405 return;
1406
1407 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
cfdda9d7
SW		 1408 mpa = (struct mpa_message *) ep->mpa_pkt;
1409
1410 /*
1411 * Validate MPA Header.
1412 */
d2fe99e8
KS		 1413 if (mpa->revision > mpa_rev) {
1414 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1415 " Received = %d\n", __func__, mpa_rev, mpa->revision);
7c0a33d6 1416 stop_ep_timer(ep);
cfdda9d7
SW		 1417 abort_connection(ep, skb, GFP_KERNEL);
1418 return;
1419 }
1420
1421 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
7c0a33d6 1422 stop_ep_timer(ep);
cfdda9d7
SW		 1423 abort_connection(ep, skb, GFP_KERNEL);
1424 return;
1425 }
1426
1427 plen = ntohs(mpa->private_data_size);
1428
1429 /*
1430 * Fail if there's too much private data.
1431 */
1432 if (plen > MPA_MAX_PRIVATE_DATA) {
7c0a33d6 1433 stop_ep_timer(ep);
cfdda9d7
SW		 1434 abort_connection(ep, skb, GFP_KERNEL);
1435 return;
1436 }
1437
1438 /*
1439 * If plen does not account for pkt size
1440 */
1441 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
7c0a33d6 1442 stop_ep_timer(ep);
cfdda9d7
SW		 1443 abort_connection(ep, skb, GFP_KERNEL);
1444 return;
1445 }
1446 ep->plen = (u8) plen;
1447
1448 /*
1449 * If we don't have all the pdata yet, then bail.
1450 */
1451 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1452 return;
1453
1454 /*
1455 * If we get here we have accumulated the entire mpa
1456 * start reply message including private data.
1457 */
1458 ep->mpa_attr.initiator = 0;
1459 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1460 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1461 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
d2fe99e8
KS		 1462 ep->mpa_attr.version = mpa->revision;
1463 if (mpa->revision == 1)
1464 ep->tried_with_mpa_v1 = 1;
1465 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1466
1467 if (mpa->revision == 2) {
1468 ep->mpa_attr.enhanced_rdma_conn =
1469 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1470 if (ep->mpa_attr.enhanced_rdma_conn) {
1471 mpa_v2_params = (struct mpa_v2_conn_params *)
1472 (ep->mpa_pkt + sizeof(*mpa));
1473 ep->ird = ntohs(mpa_v2_params->ird) &
1474 MPA_V2_IRD_ORD_MASK;
1475 ep->ord = ntohs(mpa_v2_params->ord) &
1476 MPA_V2_IRD_ORD_MASK;
1477 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1478 if (peer2peer) {
1479 if (ntohs(mpa_v2_params->ord) &
1480 MPA_V2_RDMA_WRITE_RTR)
1481 ep->mpa_attr.p2p_type =
1482 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1483 else if (ntohs(mpa_v2_params->ord) &
1484 MPA_V2_RDMA_READ_RTR)
1485 ep->mpa_attr.p2p_type =
1486 FW_RI_INIT_P2PTYPE_READ_REQ;
1487 }
1488 }
1489 } else if (mpa->revision == 1)
1490 if (peer2peer)
1491 ep->mpa_attr.p2p_type = p2p_type;
1492
cfdda9d7
SW		 1493 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1494 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1495 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1496 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1497 ep->mpa_attr.p2p_type);
1498
1499 state_set(&ep->com, MPA_REQ_RCVD);
be13b2df 1500 stop_ep_timer(ep);
cfdda9d7
SW		 1501
1502 /* drive upcall */
be13b2df
SW		 1503 mutex_lock(&ep->parent_ep->com.mutex);
1504 if (ep->parent_ep->com.state != DEAD) {
1505 if (connect_request_upcall(ep))
1506 abort_connection(ep, skb, GFP_KERNEL);
1507 } else {
1508 abort_connection(ep, skb, GFP_KERNEL);
1509 }
1510 mutex_unlock(&ep->parent_ep->com.mutex);
cfdda9d7
SW		 1511 return;
1512}
1513
1514static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1515{
1516 struct c4iw_ep *ep;
1517 struct cpl_rx_data *hdr = cplhdr(skb);
1518 unsigned int dlen = ntohs(hdr->len);
1519 unsigned int tid = GET_TID(hdr);
1520 struct tid_info *t = dev->rdev.lldi.tids;
793dad94 1521 __u8 status = hdr->status;
cfdda9d7
SW		 1522
1523 ep = lookup_tid(t, tid);
1524 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1525 skb_pull(skb, sizeof(*hdr));
1526 skb_trim(skb, dlen);
1527
cfdda9d7
SW		 1528 /* update RX credits */
1529 update_rx_credits(ep, dlen);
1530
1531 switch (state_read(&ep->com)) {
1532 case MPA_REQ_SENT:
55abf8df 1533 ep->rcv_seq += dlen;
cfdda9d7
SW		 1534 process_mpa_reply(ep, skb);
1535 break;
1536 case MPA_REQ_WAIT:
55abf8df 1537 ep->rcv_seq += dlen;
cfdda9d7
SW		 1538 process_mpa_request(ep, skb);
1539 break;
1557967b
VP		 1540 case FPDU_MODE: {
1541 struct c4iw_qp_attributes attrs;
1542 BUG_ON(!ep->com.qp);
e8e5b927 1543 if (status)
1557967b 1544 pr_err("%s Unexpected streaming data." \
04236df2
VP		 1545 " qpid %u ep %p state %d tid %u status %d\n",
1546 __func__, ep->com.qp->wq.sq.qid, ep,
1547 state_read(&ep->com), ep->hwtid, status);
97d7ec0c 1548 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1557967b 1549 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
97d7ec0c 1550 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0);
cfdda9d7
SW		 1551 break;
1552 }
1557967b
VP		 1553 default:
1554 break;
1555 }
cfdda9d7
SW		 1556 return 0;
1557}
1558
1559static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1560{
1561 struct c4iw_ep *ep;
1562 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
cfdda9d7
SW		 1563 int release = 0;
1564 unsigned int tid = GET_TID(rpl);
1565 struct tid_info *t = dev->rdev.lldi.tids;
1566
1567 ep = lookup_tid(t, tid);
4984037b
VP		 1568 if (!ep) {
1569 printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
1570 return 0;
1571 }
92dd6c3d 1572 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2f5b48c3 1573 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1574 switch (ep->com.state) {
1575 case ABORTING:
91e9c071 1576 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 1577 __state_set(&ep->com, DEAD);
1578 release = 1;
1579 break;
1580 default:
1581 printk(KERN_ERR "%s ep %p state %d\n",
1582 __func__, ep, ep->com.state);
1583 break;
1584 }
2f5b48c3 1585 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1586
1587 if (release)
1588 release_ep_resources(ep);
1589 return 0;
1590}
1591
5be78ee9
VP		 1592static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1593{
1594 struct sk_buff *skb;
1595 struct fw_ofld_connection_wr *req;
1596 unsigned int mtu_idx;
1597 int wscale;
830662f6 1598 struct sockaddr_in *sin;
5be78ee9
VP		 1599
1600 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1601 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1602 memset(req, 0, sizeof(*req));
1603 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR));
1604 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
41b4f86c
KS		 1605 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1606 ep->com.dev->rdev.lldi.ports[0],
5be78ee9 1607 ep->l2t));
830662f6
VP		 1608 sin = (struct sockaddr_in *)&ep->com.local_addr;
1609 req->le.lport = sin->sin_port;
1610 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
1611 sin = (struct sockaddr_in *)&ep->com.remote_addr;
1612 req->le.pport = sin->sin_port;
1613 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
5be78ee9
VP		 1614 req->tcb.t_state_to_astid =
1615 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_SENT) |
1616 V_FW_OFLD_CONNECTION_WR_ASTID(atid));
1617 req->tcb.cplrxdataack_cplpassacceptrpl =
1618 htons(F_FW_OFLD_CONNECTION_WR_CPLRXDATAACK);
ef5d6355 1619 req->tcb.tx_max = (__force __be32) jiffies;
793dad94 1620 req->tcb.rcv_adv = htons(1);
5be78ee9
VP		 1621 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1622 wscale = compute_wscale(rcv_win);
ef5d6355 1623 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS(1) |
5be78ee9
VP		 1624 (nocong ? NO_CONG(1) : 0) |
1625 KEEP_ALIVE(1) |
1626 DELACK(1) |
1627 WND_SCALE(wscale) |
1628 MSS_IDX(mtu_idx) |
1629 L2T_IDX(ep->l2t->idx) |
1630 TX_CHAN(ep->tx_chan) |
1631 SMAC_SEL(ep->smac_idx) |
1632 DSCP(ep->tos) |
1633 ULP_MODE(ULP_MODE_TCPDDP) |
ef5d6355
VP		 1634 RCV_BUFSIZ(rcv_win >> 10));
1635 req->tcb.opt2 = (__force __be32) (PACE(1) |
5be78ee9
VP		 1636 TX_QUEUE(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
1637 RX_CHANNEL(0) |
1638 CCTRL_ECN(enable_ecn) |
ef5d6355 1639 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid));
5be78ee9 1640 if (enable_tcp_timestamps)
ef5d6355 1641 req->tcb.opt2 |= (__force __be32) TSTAMPS_EN(1);
5be78ee9 1642 if (enable_tcp_sack)
ef5d6355 1643 req->tcb.opt2 |= (__force __be32) SACK_EN(1);
5be78ee9 1644 if (wscale && enable_tcp_window_scaling)
ef5d6355
VP		 1645 req->tcb.opt2 |= (__force __be32) WND_SCALE_EN(1);
1646 req->tcb.opt0 = cpu_to_be64((__force u64) req->tcb.opt0);
1647 req->tcb.opt2 = cpu_to_be32((__force u32) req->tcb.opt2);
793dad94
VP		 1648 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
1649 set_bit(ACT_OFLD_CONN, &ep->com.history);
5be78ee9
VP		 1650 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1651}
1652
cfdda9d7
SW		 1653/*
1654 * Return whether a failed active open has allocated a TID
1655 */
1656static inline int act_open_has_tid(int status)
1657{
1658 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1659 status != CPL_ERR_ARP_MISS;
1660}
1661
793dad94
VP		 1662#define ACT_OPEN_RETRY_COUNT 2
1663
830662f6
VP		 1664static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
1665 struct dst_entry *dst, struct c4iw_dev *cdev,
1666 bool clear_mpa_v1)
1667{
1668 struct neighbour *n;
1669 int err, step;
1670 struct net_device *pdev;
1671
1672 n = dst_neigh_lookup(dst, peer_ip);
1673 if (!n)
1674 return -ENODEV;
1675
1676 rcu_read_lock();
1677 err = -ENOMEM;
1678 if (n->dev->flags & IFF_LOOPBACK) {
1679 if (iptype == 4)
1680 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
1681 else if (IS_ENABLED(CONFIG_IPV6))
1682 for_each_netdev(&init_net, pdev) {
1683 if (ipv6_chk_addr(&init_net,
1684 (struct in6_addr *)peer_ip,
1685 pdev, 1))
1686 break;
1687 }
1688 else
1689 pdev = NULL;
1690
1691 if (!pdev) {
1692 err = -ENODEV;
1693 goto out;
1694 }
1695 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1696 n, pdev, 0);
1697 if (!ep->l2t)
1698 goto out;
1699 ep->mtu = pdev->mtu;
1700 ep->tx_chan = cxgb4_port_chan(pdev);
1701 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1702 step = cdev->rdev.lldi.ntxq /
1703 cdev->rdev.lldi.nchan;
1704 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1705 step = cdev->rdev.lldi.nrxq /
1706 cdev->rdev.lldi.nchan;
1707 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1708 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1709 cxgb4_port_idx(pdev) * step];
1710 dev_put(pdev);
1711 } else {
1712 pdev = get_real_dev(n->dev);
1713 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1714 n, pdev, 0);
1715 if (!ep->l2t)
1716 goto out;
1717 ep->mtu = dst_mtu(dst);
1718 ep->tx_chan = cxgb4_port_chan(n->dev);
1719 ep->smac_idx = (cxgb4_port_viid(n->dev) & 0x7F) << 1;
1720 step = cdev->rdev.lldi.ntxq /
1721 cdev->rdev.lldi.nchan;
1722 ep->txq_idx = cxgb4_port_idx(n->dev) * step;
1723 ep->ctrlq_idx = cxgb4_port_idx(n->dev);
1724 step = cdev->rdev.lldi.nrxq /
1725 cdev->rdev.lldi.nchan;
1726 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1727 cxgb4_port_idx(n->dev) * step];
1728
1729 if (clear_mpa_v1) {
1730 ep->retry_with_mpa_v1 = 0;
1731 ep->tried_with_mpa_v1 = 0;
1732 }
1733 }
1734 err = 0;
1735out:
1736 rcu_read_unlock();
1737
1738 neigh_release(n);
1739
1740 return err;
1741}
1742
793dad94
VP		 1743static int c4iw_reconnect(struct c4iw_ep *ep)
1744{
1745 int err = 0;
24d44a39
SW		 1746 struct sockaddr_in *laddr = (struct sockaddr_in *)
1747 &ep->com.cm_id->local_addr;
1748 struct sockaddr_in *raddr = (struct sockaddr_in *)
1749 &ep->com.cm_id->remote_addr;
830662f6
VP		 1750 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
1751 &ep->com.cm_id->local_addr;
1752 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
1753 &ep->com.cm_id->remote_addr;
1754 int iptype;
1755 __u8 *ra;
793dad94
VP		 1756
1757 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
1758 init_timer(&ep->timer);
1759
1760 /*
1761 * Allocate an active TID to initiate a TCP connection.
1762 */
1763 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
1764 if (ep->atid == -1) {
1765 pr_err("%s - cannot alloc atid.\n", __func__);
1766 err = -ENOMEM;
1767 goto fail2;
1768 }
1769 insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
1770
1771 /* find a route */
830662f6
VP		 1772 if (ep->com.cm_id->local_addr.ss_family == AF_INET) {
1773 ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
1774 raddr->sin_addr.s_addr, laddr->sin_port,
1775 raddr->sin_port, 0);
1776 iptype = 4;
1777 ra = (__u8 *)&raddr->sin_addr;
1778 } else {
1779 ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
1780 raddr6->sin6_addr.s6_addr,
1781 laddr6->sin6_port, raddr6->sin6_port, 0,
1782 raddr6->sin6_scope_id);
1783 iptype = 6;
1784 ra = (__u8 *)&raddr6->sin6_addr;
1785 }
1786 if (!ep->dst) {
793dad94
VP		 1787 pr_err("%s - cannot find route.\n", __func__);
1788 err = -EHOSTUNREACH;
1789 goto fail3;
1790 }
830662f6
VP		 1791 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false);
1792 if (err) {
793dad94 1793 pr_err("%s - cannot alloc l2e.\n", __func__);
793dad94
VP		 1794 goto fail4;
1795 }
1796
1797 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
1798 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
1799 ep->l2t->idx);
1800
1801 state_set(&ep->com, CONNECTING);
1802 ep->tos = 0;
1803
1804 /* send connect request to rnic */
1805 err = send_connect(ep);
1806 if (!err)
1807 goto out;
1808
1809 cxgb4_l2t_release(ep->l2t);
1810fail4:
1811 dst_release(ep->dst);
1812fail3:
1813 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
1814 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
1815fail2:
1816 /*
1817 * remember to send notification to upper layer.
1818 * We are in here so the upper layer is not aware that this is
1819 * re-connect attempt and so, upper layer is still waiting for
1820 * response of 1st connect request.
1821 */
1822 connect_reply_upcall(ep, -ECONNRESET);
1823 c4iw_put_ep(&ep->com);
1824out:
1825 return err;
1826}
1827
cfdda9d7
SW		 1828static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1829{
1830 struct c4iw_ep *ep;
1831 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1832 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
1833 ntohl(rpl->atid_status)));
1834 struct tid_info *t = dev->rdev.lldi.tids;
1835 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
830662f6
VP		 1836 struct sockaddr_in *la;
1837 struct sockaddr_in *ra;
1838 struct sockaddr_in6 *la6;
1839 struct sockaddr_in6 *ra6;
cfdda9d7
SW		 1840
1841 ep = lookup_atid(t, atid);
830662f6
VP		 1842 la = (struct sockaddr_in *)&ep->com.local_addr;
1843 ra = (struct sockaddr_in *)&ep->com.remote_addr;
1844 la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
1845 ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
cfdda9d7
SW		 1846
1847 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
1848 status, status2errno(status));
1849
1850 if (status == CPL_ERR_RTX_NEG_ADVICE) {
1851 printk(KERN_WARNING MOD "Connection problems for atid %u\n",
1852 atid);
1853 return 0;
1854 }
1855
793dad94
VP		 1856 set_bit(ACT_OPEN_RPL, &ep->com.history);
1857
d716a2a0
VP		 1858 /*
1859 * Log interesting failures.
1860 */
1861 switch (status) {
1862 case CPL_ERR_CONN_RESET:
1863 case CPL_ERR_CONN_TIMEDOUT:
1864 break;
5be78ee9 1865 case CPL_ERR_TCAM_FULL:
830662f6 1866 mutex_lock(&dev->rdev.stats.lock);
3b174d94 1867 dev->rdev.stats.tcam_full++;
830662f6
VP		 1868 mutex_unlock(&dev->rdev.stats.lock);
1869 if (ep->com.local_addr.ss_family == AF_INET &&
1870 dev->rdev.lldi.enable_fw_ofld_conn) {
793dad94
VP		 1871 send_fw_act_open_req(ep,
1872 GET_TID_TID(GET_AOPEN_ATID(
1873 ntohl(rpl->atid_status))));
1874 return 0;
1875 }
1876 break;
1877 case CPL_ERR_CONN_EXIST:
1878 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
1879 set_bit(ACT_RETRY_INUSE, &ep->com.history);
1880 remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
1881 atid);
1882 cxgb4_free_atid(t, atid);
1883 dst_release(ep->dst);
1884 cxgb4_l2t_release(ep->l2t);
1885 c4iw_reconnect(ep);
1886 return 0;
1887 }
5be78ee9 1888 break;
d716a2a0 1889 default:
830662f6
VP		 1890 if (ep->com.local_addr.ss_family == AF_INET) {
1891 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
1892 atid, status, status2errno(status),
1893 &la->sin_addr.s_addr, ntohs(la->sin_port),
1894 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
1895 } else {
1896 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
1897 atid, status, status2errno(status),
1898 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
1899 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
1900 }
d716a2a0
VP		 1901 break;
1902 }
1903
cfdda9d7
SW		 1904 connect_reply_upcall(ep, status2errno(status));
1905 state_set(&ep->com, DEAD);
1906
1907 if (status && act_open_has_tid(status))
1908 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
1909
793dad94 1910 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
cfdda9d7
SW		 1911 cxgb4_free_atid(t, atid);
1912 dst_release(ep->dst);
1913 cxgb4_l2t_release(ep->l2t);
1914 c4iw_put_ep(&ep->com);
1915
1916 return 0;
1917}
1918
1919static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1920{
1921 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1922 struct tid_info *t = dev->rdev.lldi.tids;
1923 unsigned int stid = GET_TID(rpl);
1924 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1925
1926 if (!ep) {
1cab775c
VP		 1927 PDBG("%s stid %d lookup failure!\n", __func__, stid);
1928 goto out;
cfdda9d7
SW		 1929 }
1930 PDBG("%s ep %p status %d error %d\n", __func__, ep,
1931 rpl->status, status2errno(rpl->status));
d9594d99 1932 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
cfdda9d7 1933
1cab775c 1934out:
cfdda9d7
SW		 1935 return 0;
1936}
1937
cfdda9d7
SW		 1938static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1939{
1940 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
1941 struct tid_info *t = dev->rdev.lldi.tids;
1942 unsigned int stid = GET_TID(rpl);
1943 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
1944
1945 PDBG("%s ep %p\n", __func__, ep);
d9594d99 1946 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
cfdda9d7
SW		 1947 return 0;
1948}
1949
830662f6 1950static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
cfdda9d7
SW		 1951 struct cpl_pass_accept_req *req)
1952{
1953 struct cpl_pass_accept_rpl *rpl;
1954 unsigned int mtu_idx;
1955 u64 opt0;
1956 u32 opt2;
1957 int wscale;
1958
1959 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1960 BUG_ON(skb_cloned(skb));
1961 skb_trim(skb, sizeof(*rpl));
1962 skb_get(skb);
1963 cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
1964 wscale = compute_wscale(rcv_win);
5be78ee9
VP		 1965 opt0 = (nocong ? NO_CONG(1) : 0) |
1966 KEEP_ALIVE(1) |
ba6d3925 1967 DELACK(1) |
cfdda9d7
SW		 1968 WND_SCALE(wscale) |
1969 MSS_IDX(mtu_idx) |
1970 L2T_IDX(ep->l2t->idx) |
1971 TX_CHAN(ep->tx_chan) |
1972 SMAC_SEL(ep->smac_idx) |
5be78ee9 1973 DSCP(ep->tos >> 2) |
b48f3b9c 1974 ULP_MODE(ULP_MODE_TCPDDP) |
cfdda9d7
SW		 1975 RCV_BUFSIZ(rcv_win>>10);
1976 opt2 = RX_CHANNEL(0) |
1977 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
1978
1979 if (enable_tcp_timestamps && req->tcpopt.tstamp)
1980 opt2 |= TSTAMPS_EN(1);
1981 if (enable_tcp_sack && req->tcpopt.sack)
1982 opt2 |= SACK_EN(1);
1983 if (wscale && enable_tcp_window_scaling)
1984 opt2 |= WND_SCALE_EN(1);
5be78ee9
VP		 1985 if (enable_ecn) {
1986 const struct tcphdr *tcph;
1987 u32 hlen = ntohl(req->hdr_len);
1988
1989 tcph = (const void *)(req + 1) + G_ETH_HDR_LEN(hlen) +
1990 G_IP_HDR_LEN(hlen);
1991 if (tcph->ece && tcph->cwr)
1992 opt2 |= CCTRL_ECN(1);
1993 }
cfdda9d7
SW		 1994
1995 rpl = cplhdr(skb);
1996 INIT_TP_WR(rpl, ep->hwtid);
1997 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1998 ep->hwtid));
1999 rpl->opt0 = cpu_to_be64(opt0);
2000 rpl->opt2 = cpu_to_be32(opt2);
d4f1a5c6 2001 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
b38a0ad8 2002 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
cfdda9d7
SW		 2003 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2004
2005 return;
2006}
2007
830662f6 2008static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
cfdda9d7 2009{
830662f6 2010 PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
cfdda9d7
SW		 2011 BUG_ON(skb_cloned(skb));
2012 skb_trim(skb, sizeof(struct cpl_tid_release));
2013 skb_get(skb);
2014 release_tid(&dev->rdev, hwtid, skb);
2015 return;
2016}
2017
830662f6
VP		 2018static void get_4tuple(struct cpl_pass_accept_req *req, int *iptype,
2019 __u8 *local_ip, __u8 *peer_ip,
cfdda9d7
SW		 2020 __be16 *local_port, __be16 *peer_port)
2021{
2022 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
2023 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
2024 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
830662f6 2025 struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
cfdda9d7
SW		 2026 struct tcphdr *tcp = (struct tcphdr *)
2027 ((u8 *)(req + 1) + eth_len + ip_len);
2028
830662f6
VP		 2029 if (ip->version == 4) {
2030 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
2031 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
2032 ntohs(tcp->dest));
2033 *iptype = 4;
2034 memcpy(peer_ip, &ip->saddr, 4);
2035 memcpy(local_ip, &ip->daddr, 4);
2036 } else {
2037 PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
2038 ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
2039 ntohs(tcp->dest));
2040 *iptype = 6;
2041 memcpy(peer_ip, ip6->saddr.s6_addr, 16);
2042 memcpy(local_ip, ip6->daddr.s6_addr, 16);
2043 }
cfdda9d7
SW		 2044 *peer_port = tcp->source;
2045 *local_port = tcp->dest;
2046
2047 return;
2048}
2049
2050static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2051{
793dad94 2052 struct c4iw_ep *child_ep = NULL, *parent_ep;
cfdda9d7
SW		 2053 struct cpl_pass_accept_req *req = cplhdr(skb);
2054 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
2055 struct tid_info *t = dev->rdev.lldi.tids;
2056 unsigned int hwtid = GET_TID(req);
2057 struct dst_entry *dst;
830662f6 2058 __u8 local_ip[16], peer_ip[16];
cfdda9d7 2059 __be16 local_port, peer_port;
3786cf18 2060 int err;
1cab775c 2061 u16 peer_mss = ntohs(req->tcpopt.mss);
830662f6 2062 int iptype;
cfdda9d7
SW		 2063
2064 parent_ep = lookup_stid(t, stid);
1cab775c
VP		 2065 if (!parent_ep) {
2066 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
2067 goto reject;
2068 }
1cab775c 2069
cfdda9d7
SW		 2070 if (state_read(&parent_ep->com) != LISTEN) {
2071 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
2072 __func__);
2073 goto reject;
2074 }
2075
830662f6
VP		 2076 get_4tuple(req, &iptype, local_ip, peer_ip, &local_port, &peer_port);
2077
cfdda9d7 2078 /* Find output route */
830662f6
VP		 2079 if (iptype == 4) {
2080 PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2081 , __func__, parent_ep, hwtid,
2082 local_ip, peer_ip, ntohs(local_port),
2083 ntohs(peer_port), peer_mss);
2084 dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
2085 local_port, peer_port,
2086 GET_POPEN_TOS(ntohl(req->tos_stid)));
2087 } else {
2088 PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2089 , __func__, parent_ep, hwtid,
2090 local_ip, peer_ip, ntohs(local_port),
2091 ntohs(peer_port), peer_mss);
2092 dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
2093 PASS_OPEN_TOS(ntohl(req->tos_stid)),
2094 ((struct sockaddr_in6 *)
2095 &parent_ep->com.local_addr)->sin6_scope_id);
2096 }
2097 if (!dst) {
cfdda9d7
SW		 2098 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
2099 __func__);
2100 goto reject;
2101 }
3786cf18
DM		 2102
2103 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2104 if (!child_ep) {
2105 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
cfdda9d7
SW		 2106 __func__);
2107 dst_release(dst);
2108 goto reject;
2109 }
2110
830662f6 2111 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false);
3786cf18
DM		 2112 if (err) {
2113 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
cfdda9d7 2114 __func__);
cfdda9d7 2115 dst_release(dst);
3786cf18 2116 kfree(child_ep);
cfdda9d7
SW		 2117 goto reject;
2118 }
3786cf18 2119
1cab775c
VP		 2120 if (peer_mss && child_ep->mtu > (peer_mss + 40))
2121 child_ep->mtu = peer_mss + 40;
2122
cfdda9d7
SW		 2123 state_set(&child_ep->com, CONNECTING);
2124 child_ep->com.dev = dev;
2125 child_ep->com.cm_id = NULL;
830662f6
VP		 2126 if (iptype == 4) {
2127 struct sockaddr_in *sin = (struct sockaddr_in *)
2128 &child_ep->com.local_addr;
2129 sin->sin_family = PF_INET;
2130 sin->sin_port = local_port;
2131 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2132 sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
2133 sin->sin_family = PF_INET;
2134 sin->sin_port = peer_port;
2135 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2136 } else {
2137 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
2138 &child_ep->com.local_addr;
2139 sin6->sin6_family = PF_INET6;
2140 sin6->sin6_port = local_port;
2141 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2142 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
2143 sin6->sin6_family = PF_INET6;
2144 sin6->sin6_port = peer_port;
2145 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2146 }
cfdda9d7
SW		 2147 c4iw_get_ep(&parent_ep->com);
2148 child_ep->parent_ep = parent_ep;
2149 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
cfdda9d7
SW		 2150 child_ep->dst = dst;
2151 child_ep->hwtid = hwtid;
cfdda9d7
SW		 2152
2153 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
3786cf18 2154 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
cfdda9d7
SW		 2155
2156 init_timer(&child_ep->timer);
2157 cxgb4_insert_tid(t, child_ep, hwtid);
b3de6cfe 2158 insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
830662f6 2159 accept_cr(child_ep, skb, req);
793dad94 2160 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
cfdda9d7
SW		 2161 goto out;
2162reject:
830662f6 2163 reject_cr(dev, hwtid, skb);
cfdda9d7
SW		 2164out:
2165 return 0;
2166}
2167
2168static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2169{
2170 struct c4iw_ep *ep;
2171 struct cpl_pass_establish *req = cplhdr(skb);
2172 struct tid_info *t = dev->rdev.lldi.tids;
2173 unsigned int tid = GET_TID(req);
2174
2175 ep = lookup_tid(t, tid);
2176 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2177 ep->snd_seq = be32_to_cpu(req->snd_isn);
2178 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2179
1cab775c
VP		 2180 PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
2181 ntohs(req->tcp_opt));
2182
cfdda9d7
SW		 2183 set_emss(ep, ntohs(req->tcp_opt));
2184
2185 dst_confirm(ep->dst);
2186 state_set(&ep->com, MPA_REQ_WAIT);
2187 start_ep_timer(ep);
2188 send_flowc(ep, skb);
793dad94 2189 set_bit(PASS_ESTAB, &ep->com.history);
cfdda9d7
SW		 2190
2191 return 0;
2192}
2193
2194static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2195{
2196 struct cpl_peer_close *hdr = cplhdr(skb);
2197 struct c4iw_ep *ep;
2198 struct c4iw_qp_attributes attrs;
cfdda9d7
SW		 2199 int disconnect = 1;
2200 int release = 0;
cfdda9d7
SW		 2201 struct tid_info *t = dev->rdev.lldi.tids;
2202 unsigned int tid = GET_TID(hdr);
8da7e7a5 2203 int ret;
cfdda9d7
SW		 2204
2205 ep = lookup_tid(t, tid);
2206 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2207 dst_confirm(ep->dst);
2208
793dad94 2209 set_bit(PEER_CLOSE, &ep->com.history);
2f5b48c3 2210 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2211 switch (ep->com.state) {
2212 case MPA_REQ_WAIT:
2213 __state_set(&ep->com, CLOSING);
2214 break;
2215 case MPA_REQ_SENT:
2216 __state_set(&ep->com, CLOSING);
2217 connect_reply_upcall(ep, -ECONNRESET);
2218 break;
2219 case MPA_REQ_RCVD:
2220
2221 /*
2222 * We're gonna mark this puppy DEAD, but keep
2223 * the reference on it until the ULP accepts or
2224 * rejects the CR. Also wake up anyone waiting
2225 * in rdma connection migration (see c4iw_accept_cr()).
2226 */
2227 __state_set(&ep->com, CLOSING);
cfdda9d7 2228 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
d9594d99 2229 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 2230 break;
2231 case MPA_REP_SENT:
2232 __state_set(&ep->com, CLOSING);
cfdda9d7 2233 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
d9594d99 2234 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 2235 break;
2236 case FPDU_MODE:
ca5a2202 2237 start_ep_timer(ep);
cfdda9d7 2238 __state_set(&ep->com, CLOSING);
30c95c2d 2239 attrs.next_state = C4IW_QP_STATE_CLOSING;
8da7e7a5 2240 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
30c95c2d 2241 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
8da7e7a5
SW		 2242 if (ret != -ECONNRESET) {
2243 peer_close_upcall(ep);
2244 disconnect = 1;
2245 }
cfdda9d7
SW		 2246 break;
2247 case ABORTING:
2248 disconnect = 0;
2249 break;
2250 case CLOSING:
2251 __state_set(&ep->com, MORIBUND);
2252 disconnect = 0;
2253 break;
2254 case MORIBUND:
ca5a2202 2255 stop_ep_timer(ep);
cfdda9d7
SW		 2256 if (ep->com.cm_id && ep->com.qp) {
2257 attrs.next_state = C4IW_QP_STATE_IDLE;
2258 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2259 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2260 }
be13b2df 2261 close_complete_upcall(ep, 0);
cfdda9d7
SW		 2262 __state_set(&ep->com, DEAD);
2263 release = 1;
2264 disconnect = 0;
2265 break;
2266 case DEAD:
2267 disconnect = 0;
2268 break;
2269 default:
2270 BUG_ON(1);
2271 }
2f5b48c3 2272 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2273 if (disconnect)
2274 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2275 if (release)
2276 release_ep_resources(ep);
2277 return 0;
2278}
2279
2280/*
2281 * Returns whether an ABORT_REQ_RSS message is a negative advice.
2282 */
2283static int is_neg_adv_abort(unsigned int status)
2284{
2285 return status == CPL_ERR_RTX_NEG_ADVICE ||
2286 status == CPL_ERR_PERSIST_NEG_ADVICE;
2287}
2288
2289static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2290{
2291 struct cpl_abort_req_rss *req = cplhdr(skb);
2292 struct c4iw_ep *ep;
2293 struct cpl_abort_rpl *rpl;
2294 struct sk_buff *rpl_skb;
2295 struct c4iw_qp_attributes attrs;
2296 int ret;
2297 int release = 0;
cfdda9d7
SW		 2298 struct tid_info *t = dev->rdev.lldi.tids;
2299 unsigned int tid = GET_TID(req);
cfdda9d7
SW		 2300
2301 ep = lookup_tid(t, tid);
2302 if (is_neg_adv_abort(req->status)) {
2303 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
2304 ep->hwtid);
2305 return 0;
2306 }
cfdda9d7
SW		 2307 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2308 ep->com.state);
793dad94 2309 set_bit(PEER_ABORT, &ep->com.history);
2f5b48c3
SW		 2310
2311 /*
2312 * Wake up any threads in rdma_init() or rdma_fini().
d2fe99e8
KS		 2313 * However, this is not needed if com state is just
2314 * MPA_REQ_SENT
2f5b48c3 2315 */
d2fe99e8
KS		 2316 if (ep->com.state != MPA_REQ_SENT)
2317 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2f5b48c3
SW		 2318
2319 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2320 switch (ep->com.state) {
2321 case CONNECTING:
2322 break;
2323 case MPA_REQ_WAIT:
ca5a2202 2324 stop_ep_timer(ep);
cfdda9d7
SW		 2325 break;
2326 case MPA_REQ_SENT:
ca5a2202 2327 stop_ep_timer(ep);
fe7e0a4d 2328 if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
d2fe99e8
KS		 2329 connect_reply_upcall(ep, -ECONNRESET);
2330 else {
2331 /*
2332 * we just don't send notification upwards because we
2333 * want to retry with mpa_v1 without upper layers even
2334 * knowing it.
2335 *
2336 * do some housekeeping so as to re-initiate the
2337 * connection
2338 */
2339 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
2340 mpa_rev);
2341 ep->retry_with_mpa_v1 = 1;
2342 }
cfdda9d7
SW		 2343 break;
2344 case MPA_REP_SENT:
cfdda9d7
SW		 2345 break;
2346 case MPA_REQ_RCVD:
cfdda9d7
SW		 2347 break;
2348 case MORIBUND:
2349 case CLOSING:
ca5a2202 2350 stop_ep_timer(ep);
cfdda9d7
SW		 2351 /*FALLTHROUGH*/
2352 case FPDU_MODE:
2353 if (ep->com.cm_id && ep->com.qp) {
2354 attrs.next_state = C4IW_QP_STATE_ERROR;
2355 ret = c4iw_modify_qp(ep->com.qp->rhp,
2356 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2357 &attrs, 1);
2358 if (ret)
2359 printk(KERN_ERR MOD
2360 "%s - qp <- error failed!\n",
2361 __func__);
2362 }
2363 peer_abort_upcall(ep);
2364 break;
2365 case ABORTING:
2366 break;
2367 case DEAD:
2368 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2f5b48c3 2369 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2370 return 0;
2371 default:
2372 BUG_ON(1);
2373 break;
2374 }
2375 dst_confirm(ep->dst);
2376 if (ep->com.state != ABORTING) {
2377 __state_set(&ep->com, DEAD);
d2fe99e8
KS		 2378 /* we don't release if we want to retry with mpa_v1 */
2379 if (!ep->retry_with_mpa_v1)
2380 release = 1;
cfdda9d7 2381 }
2f5b48c3 2382 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2383
2384 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2385 if (!rpl_skb) {
2386 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
2387 __func__);
2388 release = 1;
2389 goto out;
2390 }
2391 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2392 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2393 INIT_TP_WR(rpl, ep->hwtid);
2394 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2395 rpl->cmd = CPL_ABORT_NO_RST;
2396 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2397out:
cfdda9d7
SW		 2398 if (release)
2399 release_ep_resources(ep);
fe7e0a4d
VP		 2400 else if (ep->retry_with_mpa_v1) {
2401 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
d2fe99e8
KS		 2402 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2403 dst_release(ep->dst);
2404 cxgb4_l2t_release(ep->l2t);
2405 c4iw_reconnect(ep);
2406 }
2407
cfdda9d7
SW		 2408 return 0;
2409}
2410
2411static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2412{
2413 struct c4iw_ep *ep;
2414 struct c4iw_qp_attributes attrs;
2415 struct cpl_close_con_rpl *rpl = cplhdr(skb);
cfdda9d7
SW		 2416 int release = 0;
2417 struct tid_info *t = dev->rdev.lldi.tids;
2418 unsigned int tid = GET_TID(rpl);
cfdda9d7
SW		 2419
2420 ep = lookup_tid(t, tid);
2421
2422 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2423 BUG_ON(!ep);
2424
2425 /* The cm_id may be null if we failed to connect */
2f5b48c3 2426 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2427 switch (ep->com.state) {
2428 case CLOSING:
2429 __state_set(&ep->com, MORIBUND);
2430 break;
2431 case MORIBUND:
ca5a2202 2432 stop_ep_timer(ep);
cfdda9d7
SW		 2433 if ((ep->com.cm_id) && (ep->com.qp)) {
2434 attrs.next_state = C4IW_QP_STATE_IDLE;
2435 c4iw_modify_qp(ep->com.qp->rhp,
2436 ep->com.qp,
2437 C4IW_QP_ATTR_NEXT_STATE,
2438 &attrs, 1);
2439 }
be13b2df 2440 close_complete_upcall(ep, 0);
cfdda9d7
SW		 2441 __state_set(&ep->com, DEAD);
2442 release = 1;
2443 break;
2444 case ABORTING:
2445 case DEAD:
2446 break;
2447 default:
2448 BUG_ON(1);
2449 break;
2450 }
2f5b48c3 2451 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2452 if (release)
2453 release_ep_resources(ep);
2454 return 0;
2455}
2456
2457static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2458{
0e42c1f4 2459 struct cpl_rdma_terminate *rpl = cplhdr(skb);
cfdda9d7 2460 struct tid_info *t = dev->rdev.lldi.tids;
0e42c1f4
SW		 2461 unsigned int tid = GET_TID(rpl);
2462 struct c4iw_ep *ep;
2463 struct c4iw_qp_attributes attrs;
cfdda9d7
SW		 2464
2465 ep = lookup_tid(t, tid);
0e42c1f4 2466 BUG_ON(!ep);
cfdda9d7 2467
30c95c2d 2468 if (ep && ep->com.qp) {
0e42c1f4
SW		 2469 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2470 ep->com.qp->wq.sq.qid);
2471 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2472 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2473 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2474 } else
30c95c2d 2475 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
cfdda9d7 2476
cfdda9d7
SW		 2477 return 0;
2478}
2479
2480/*
2481 * Upcall from the adapter indicating data has been transmitted.
2482 * For us its just the single MPA request or reply. We can now free
2483 * the skb holding the mpa message.
2484 */
2485static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2486{
2487 struct c4iw_ep *ep;
2488 struct cpl_fw4_ack *hdr = cplhdr(skb);
2489 u8 credits = hdr->credits;
2490 unsigned int tid = GET_TID(hdr);
2491 struct tid_info *t = dev->rdev.lldi.tids;
2492
2493
2494 ep = lookup_tid(t, tid);
2495 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
2496 if (credits == 0) {
aa1ad260
JP		 2497 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
2498 __func__, ep, ep->hwtid, state_read(&ep->com));
cfdda9d7
SW		 2499 return 0;
2500 }
2501
2502 dst_confirm(ep->dst);
2503 if (ep->mpa_skb) {
2504 PDBG("%s last streaming msg ack ep %p tid %u state %u "
2505 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
2506 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
2507 kfree_skb(ep->mpa_skb);
2508 ep->mpa_skb = NULL;
2509 }
2510 return 0;
2511}
2512
cfdda9d7
SW		 2513int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2514{
a7db89eb
SW		 2515 int err = 0;
2516 int disconnect = 0;
cfdda9d7
SW		 2517 struct c4iw_ep *ep = to_ep(cm_id);
2518 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2519
a7db89eb
SW		 2520 mutex_lock(&ep->com.mutex);
2521 if (ep->com.state == DEAD) {
2522 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2523 c4iw_put_ep(&ep->com);
2524 return -ECONNRESET;
2525 }
793dad94 2526 set_bit(ULP_REJECT, &ep->com.history);
a7db89eb 2527 BUG_ON(ep->com.state != MPA_REQ_RCVD);
cfdda9d7
SW		 2528 if (mpa_rev == 0)
2529 abort_connection(ep, NULL, GFP_KERNEL);
2530 else {
2531 err = send_mpa_reject(ep, pdata, pdata_len);
a7db89eb 2532 disconnect = 1;
cfdda9d7 2533 }
a7db89eb
SW		 2534 mutex_unlock(&ep->com.mutex);
2535 if (disconnect)
2536 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
cfdda9d7
SW		 2537 c4iw_put_ep(&ep->com);
2538 return 0;
2539}
2540
2541int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2542{
2543 int err;
2544 struct c4iw_qp_attributes attrs;
2545 enum c4iw_qp_attr_mask mask;
2546 struct c4iw_ep *ep = to_ep(cm_id);
2547 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2548 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2549
2550 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
a7db89eb
SW		 2551
2552 mutex_lock(&ep->com.mutex);
2553 if (ep->com.state == DEAD) {
cfdda9d7
SW		 2554 err = -ECONNRESET;
2555 goto err;
2556 }
2557
a7db89eb 2558 BUG_ON(ep->com.state != MPA_REQ_RCVD);
cfdda9d7
SW		 2559 BUG_ON(!qp);
2560
793dad94 2561 set_bit(ULP_ACCEPT, &ep->com.history);
be4c9bad
RD		 2562 if ((conn_param->ord > c4iw_max_read_depth) ||
2563 (conn_param->ird > c4iw_max_read_depth)) {
cfdda9d7
SW		 2564 abort_connection(ep, NULL, GFP_KERNEL);
2565 err = -EINVAL;
2566 goto err;
2567 }
2568
d2fe99e8
KS		 2569 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2570 if (conn_param->ord > ep->ird) {
2571 ep->ird = conn_param->ird;
2572 ep->ord = conn_param->ord;
2573 send_mpa_reject(ep, conn_param->private_data,
2574 conn_param->private_data_len);
2575 abort_connection(ep, NULL, GFP_KERNEL);
2576 err = -ENOMEM;
2577 goto err;
2578 }
2579 if (conn_param->ird > ep->ord) {
2580 if (!ep->ord)
2581 conn_param->ird = 1;
2582 else {
2583 abort_connection(ep, NULL, GFP_KERNEL);
2584 err = -ENOMEM;
2585 goto err;
2586 }
2587 }
cfdda9d7 2588
d2fe99e8 2589 }
cfdda9d7
SW		 2590 ep->ird = conn_param->ird;
2591 ep->ord = conn_param->ord;
2592
d2fe99e8
KS		 2593 if (ep->mpa_attr.version != 2)
2594 if (peer2peer && ep->ird == 0)
2595 ep->ird = 1;
cfdda9d7
SW		 2596
2597 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
2598
d2fe99e8
KS		 2599 cm_id->add_ref(cm_id);
2600 ep->com.cm_id = cm_id;
2601 ep->com.qp = qp;
325abead 2602 ref_qp(ep);
d2fe99e8 2603
cfdda9d7
SW		 2604 /* bind QP to EP and move to RTS */
2605 attrs.mpa_attr = ep->mpa_attr;
2606 attrs.max_ird = ep->ird;
2607 attrs.max_ord = ep->ord;
2608 attrs.llp_stream_handle = ep;
2609 attrs.next_state = C4IW_QP_STATE_RTS;
2610
2611 /* bind QP and TID with INIT_WR */
2612 mask = C4IW_QP_ATTR_NEXT_STATE |
2613 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2614 C4IW_QP_ATTR_MPA_ATTR |
2615 C4IW_QP_ATTR_MAX_IRD |
2616 C4IW_QP_ATTR_MAX_ORD;
2617
2618 err = c4iw_modify_qp(ep->com.qp->rhp,
2619 ep->com.qp, mask, &attrs, 1);
2620 if (err)
2621 goto err1;
2622 err = send_mpa_reply(ep, conn_param->private_data,
2623 conn_param->private_data_len);
2624 if (err)
2625 goto err1;
2626
a7db89eb 2627 __state_set(&ep->com, FPDU_MODE);
cfdda9d7 2628 established_upcall(ep);
a7db89eb 2629 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2630 c4iw_put_ep(&ep->com);
2631 return 0;
2632err1:
2633 ep->com.cm_id = NULL;
cfdda9d7
SW		 2634 cm_id->rem_ref(cm_id);
2635err:
a7db89eb 2636 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2637 c4iw_put_ep(&ep->com);
2638 return err;
2639}
2640
830662f6
VP		 2641static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2642{
2643 struct in_device *ind;
2644 int found = 0;
2645 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
2646 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
2647
2648 ind = in_dev_get(dev->rdev.lldi.ports[0]);
2649 if (!ind)
2650 return -EADDRNOTAVAIL;
2651 for_primary_ifa(ind) {
2652 laddr->sin_addr.s_addr = ifa->ifa_address;
2653 raddr->sin_addr.s_addr = ifa->ifa_address;
2654 found = 1;
2655 break;
2656 }
2657 endfor_ifa(ind);
2658 in_dev_put(ind);
2659 return found ? 0 : -EADDRNOTAVAIL;
2660}
2661
2662static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
2663 unsigned char banned_flags)
2664{
2665 struct inet6_dev *idev;
2666 int err = -EADDRNOTAVAIL;
2667
2668 rcu_read_lock();
2669 idev = __in6_dev_get(dev);
2670 if (idev != NULL) {
2671 struct inet6_ifaddr *ifp;
2672
2673 read_lock_bh(&idev->lock);
2674 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2675 if (ifp->scope == IFA_LINK &&
2676 !(ifp->flags & banned_flags)) {
2677 memcpy(addr, &ifp->addr, 16);
2678 err = 0;
2679 break;
2680 }
2681 }
2682 read_unlock_bh(&idev->lock);
2683 }
2684 rcu_read_unlock();
2685 return err;
2686}
2687
2688static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2689{
2690 struct in6_addr uninitialized_var(addr);
2691 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->local_addr;
2692 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->remote_addr;
2693
2694 if (get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
2695 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
2696 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
2697 return 0;
2698 }
2699 return -EADDRNOTAVAIL;
2700}
2701
cfdda9d7
SW		 2702int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2703{
cfdda9d7
SW		 2704 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2705 struct c4iw_ep *ep;
3786cf18 2706 int err = 0;
24d44a39
SW		 2707 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
2708 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
830662f6
VP		 2709 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr;
2710 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
2711 &cm_id->remote_addr;
2712 __u8 *ra;
2713 int iptype;
cfdda9d7 2714
be4c9bad
RD		 2715 if ((conn_param->ord > c4iw_max_read_depth) ||
2716 (conn_param->ird > c4iw_max_read_depth)) {
2717 err = -EINVAL;
2718 goto out;
2719 }
cfdda9d7
SW		 2720 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2721 if (!ep) {
2722 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2723 err = -ENOMEM;
2724 goto out;
2725 }
2726 init_timer(&ep->timer);
2727 ep->plen = conn_param->private_data_len;
2728 if (ep->plen)
2729 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
2730 conn_param->private_data, ep->plen);
2731 ep->ird = conn_param->ird;
2732 ep->ord = conn_param->ord;
2733
2734 if (peer2peer && ep->ord == 0)
2735 ep->ord = 1;
2736
2737 cm_id->add_ref(cm_id);
2738 ep->com.dev = dev;
2739 ep->com.cm_id = cm_id;
2740 ep->com.qp = get_qhp(dev, conn_param->qpn);
830662f6
VP		 2741 if (!ep->com.qp) {
2742 PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
2743 err = -EINVAL;
2744 goto fail2;
2745 }
325abead 2746 ref_qp(ep);
cfdda9d7
SW		 2747 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
2748 ep->com.qp, cm_id);
2749
2750 /*
2751 * Allocate an active TID to initiate a TCP connection.
2752 */
2753 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
2754 if (ep->atid == -1) {
2755 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
2756 err = -ENOMEM;
2757 goto fail2;
2758 }
793dad94 2759 insert_handle(dev, &dev->atid_idr, ep, ep->atid);
cfdda9d7 2760
830662f6
VP		 2761 if (cm_id->remote_addr.ss_family == AF_INET) {
2762 iptype = 4;
2763 ra = (__u8 *)&raddr->sin_addr;
cfdda9d7 2764
830662f6
VP		 2765 /*
2766 * Handle loopback requests to INADDR_ANY.
2767 */
2768 if ((__force int)raddr->sin_addr.s_addr == INADDR_ANY) {
2769 err = pick_local_ipaddrs(dev, cm_id);
2770 if (err)
2771 goto fail2;
2772 }
2773
2774 /* find a route */
2775 PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
2776 __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
2777 ra, ntohs(raddr->sin_port));
2778 ep->dst = find_route(dev, laddr->sin_addr.s_addr,
2779 raddr->sin_addr.s_addr, laddr->sin_port,
2780 raddr->sin_port, 0);
2781 } else {
2782 iptype = 6;
2783 ra = (__u8 *)&raddr6->sin6_addr;
2784
2785 /*
2786 * Handle loopback requests to INADDR_ANY.
2787 */
2788 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
2789 err = pick_local_ip6addrs(dev, cm_id);
2790 if (err)
2791 goto fail2;
2792 }
2793
2794 /* find a route */
2795 PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
2796 __func__, laddr6->sin6_addr.s6_addr,
2797 ntohs(laddr6->sin6_port),
2798 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
2799 ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
2800 raddr6->sin6_addr.s6_addr,
2801 laddr6->sin6_port, raddr6->sin6_port, 0,
2802 raddr6->sin6_scope_id);
2803 }
2804 if (!ep->dst) {
cfdda9d7
SW		 2805 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
2806 err = -EHOSTUNREACH;
2807 goto fail3;
2808 }
cfdda9d7 2809
830662f6 2810 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true);
3786cf18 2811 if (err) {
cfdda9d7 2812 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
cfdda9d7
SW		 2813 goto fail4;
2814 }
2815
2816 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2817 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2818 ep->l2t->idx);
2819
2820 state_set(&ep->com, CONNECTING);
2821 ep->tos = 0;
24d44a39
SW		 2822 memcpy(&ep->com.local_addr, &cm_id->local_addr,
2823 sizeof(ep->com.local_addr));
2824 memcpy(&ep->com.remote_addr, &cm_id->remote_addr,
2825 sizeof(ep->com.remote_addr));
cfdda9d7
SW		 2826
2827 /* send connect request to rnic */
2828 err = send_connect(ep);
2829 if (!err)
2830 goto out;
2831
2832 cxgb4_l2t_release(ep->l2t);
2833fail4:
2834 dst_release(ep->dst);
2835fail3:
793dad94 2836 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
cfdda9d7
SW		 2837 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2838fail2:
2839 cm_id->rem_ref(cm_id);
2840 c4iw_put_ep(&ep->com);
2841out:
2842 return err;
2843}
2844
830662f6
VP		 2845static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
2846{
2847 int err;
2848 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
2849
2850 c4iw_init_wr_wait(&ep->com.wr_wait);
2851 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
2852 ep->stid, &sin6->sin6_addr,
2853 sin6->sin6_port,
2854 ep->com.dev->rdev.lldi.rxq_ids[0]);
2855 if (!err)
2856 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
2857 &ep->com.wr_wait,
2858 0, 0, __func__);
2859 if (err)
2860 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
2861 err, ep->stid,
2862 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
2863 return err;
2864}
2865
2866static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
2867{
2868 int err;
2869 struct sockaddr_in *sin = (struct sockaddr_in *)&ep->com.local_addr;
2870
2871 if (dev->rdev.lldi.enable_fw_ofld_conn) {
2872 do {
2873 err = cxgb4_create_server_filter(
2874 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2875 sin->sin_addr.s_addr, sin->sin_port, 0,
2876 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
2877 if (err == -EBUSY) {
2878 set_current_state(TASK_UNINTERRUPTIBLE);
2879 schedule_timeout(usecs_to_jiffies(100));
2880 }
2881 } while (err == -EBUSY);
2882 } else {
2883 c4iw_init_wr_wait(&ep->com.wr_wait);
2884 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
2885 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
2886 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
2887 if (!err)
2888 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
2889 &ep->com.wr_wait,
2890 0, 0, __func__);
2891 }
2892 if (err)
2893 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
2894 , err, ep->stid,
2895 &sin->sin_addr, ntohs(sin->sin_port));
2896 return err;
2897}
2898
cfdda9d7
SW		 2899int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
2900{
2901 int err = 0;
2902 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2903 struct c4iw_listen_ep *ep;
2904
cfdda9d7
SW		 2905 might_sleep();
2906
2907 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
2908 if (!ep) {
2909 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
2910 err = -ENOMEM;
2911 goto fail1;
2912 }
2913 PDBG("%s ep %p\n", __func__, ep);
2914 cm_id->add_ref(cm_id);
2915 ep->com.cm_id = cm_id;
2916 ep->com.dev = dev;
2917 ep->backlog = backlog;
24d44a39
SW		 2918 memcpy(&ep->com.local_addr, &cm_id->local_addr,
2919 sizeof(ep->com.local_addr));
cfdda9d7
SW		 2920
2921 /*
2922 * Allocate a server TID.
2923 */
8c044690
KS		 2924 if (dev->rdev.lldi.enable_fw_ofld_conn &&
2925 ep->com.local_addr.ss_family == AF_INET)
830662f6
VP		 2926 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
2927 cm_id->local_addr.ss_family, ep);
1cab775c 2928 else
830662f6
VP		 2929 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
2930 cm_id->local_addr.ss_family, ep);
1cab775c 2931
cfdda9d7 2932 if (ep->stid == -1) {
be4c9bad 2933 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
cfdda9d7
SW		 2934 err = -ENOMEM;
2935 goto fail2;
2936 }
793dad94 2937 insert_handle(dev, &dev->stid_idr, ep, ep->stid);
cfdda9d7 2938 state_set(&ep->com, LISTEN);
830662f6
VP		 2939 if (ep->com.local_addr.ss_family == AF_INET)
2940 err = create_server4(dev, ep);
2941 else
2942 err = create_server6(dev, ep);
cfdda9d7
SW		 2943 if (!err) {
2944 cm_id->provider_data = ep;
2945 goto out;
2946 }
830662f6
VP		 2947 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
2948 ep->com.local_addr.ss_family);
cfdda9d7
SW		 2949fail2:
2950 cm_id->rem_ref(cm_id);
2951 c4iw_put_ep(&ep->com);
2952fail1:
2953out:
2954 return err;
2955}
2956
2957int c4iw_destroy_listen(struct iw_cm_id *cm_id)
2958{
2959 int err;
2960 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
2961
2962 PDBG("%s ep %p\n", __func__, ep);
2963
2964 might_sleep();
2965 state_set(&ep->com, DEAD);
830662f6
VP		 2966 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
2967 ep->com.local_addr.ss_family == AF_INET) {
1cab775c
VP		 2968 err = cxgb4_remove_server_filter(
2969 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2970 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
2971 } else {
2972 c4iw_init_wr_wait(&ep->com.wr_wait);
830662f6
VP		 2973 err = cxgb4_remove_server(
2974 ep->com.dev->rdev.lldi.ports[0], ep->stid,
2975 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
1cab775c
VP		 2976 if (err)
2977 goto done;
2978 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
2979 0, 0, __func__);
2980 }
793dad94 2981 remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
830662f6
VP		 2982 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
2983 ep->com.local_addr.ss_family);
cfdda9d7 2984done:
cfdda9d7
SW		 2985 cm_id->rem_ref(cm_id);
2986 c4iw_put_ep(&ep->com);
2987 return err;
2988}
2989
2990int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
2991{
2992 int ret = 0;
cfdda9d7
SW		 2993 int close = 0;
2994 int fatal = 0;
2995 struct c4iw_rdev *rdev;
cfdda9d7 2996
2f5b48c3 2997 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2998
2999 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
3000 states[ep->com.state], abrupt);
3001
3002 rdev = &ep->com.dev->rdev;
3003 if (c4iw_fatal_error(rdev)) {
3004 fatal = 1;
be13b2df 3005 close_complete_upcall(ep, -EIO);
cfdda9d7
SW		 3006 ep->com.state = DEAD;
3007 }
3008 switch (ep->com.state) {
3009 case MPA_REQ_WAIT:
3010 case MPA_REQ_SENT:
3011 case MPA_REQ_RCVD:
3012 case MPA_REP_SENT:
3013 case FPDU_MODE:
3014 close = 1;
3015 if (abrupt)
3016 ep->com.state = ABORTING;
3017 else {
3018 ep->com.state = CLOSING;
ca5a2202 3019 start_ep_timer(ep);
cfdda9d7
SW		 3020 }
3021 set_bit(CLOSE_SENT, &ep->com.flags);
3022 break;
3023 case CLOSING:
3024 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3025 close = 1;
3026 if (abrupt) {
ca5a2202 3027 stop_ep_timer(ep);
cfdda9d7
SW		 3028 ep->com.state = ABORTING;
3029 } else
3030 ep->com.state = MORIBUND;
3031 }
3032 break;
3033 case MORIBUND:
3034 case ABORTING:
3035 case DEAD:
3036 PDBG("%s ignoring disconnect ep %p state %u\n",
3037 __func__, ep, ep->com.state);
3038 break;
3039 default:
3040 BUG();
3041 break;
3042 }
3043
cfdda9d7 3044 if (close) {
8da7e7a5 3045 if (abrupt) {
793dad94 3046 set_bit(EP_DISC_ABORT, &ep->com.history);
be13b2df 3047 close_complete_upcall(ep, -ECONNRESET);
8da7e7a5 3048 ret = send_abort(ep, NULL, gfp);
793dad94
VP		 3049 } else {
3050 set_bit(EP_DISC_CLOSE, &ep->com.history);
cfdda9d7 3051 ret = send_halfclose(ep, gfp);
793dad94 3052 }
cfdda9d7
SW		 3053 if (ret)
3054 fatal = 1;
3055 }
8da7e7a5 3056 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 3057 if (fatal)
3058 release_ep_resources(ep);
3059 return ret;
3060}
3061
1cab775c
VP		 3062static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3063 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3064{
3065 struct c4iw_ep *ep;
793dad94 3066 int atid = be32_to_cpu(req->tid);
1cab775c 3067
ef5d6355
VP		 3068 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3069 (__force u32) req->tid);
1cab775c
VP		 3070 if (!ep)
3071 return;
3072
3073 switch (req->retval) {
3074 case FW_ENOMEM:
793dad94
VP		 3075 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3076 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3077 send_fw_act_open_req(ep, atid);
3078 return;
3079 }
1cab775c 3080 case FW_EADDRINUSE:
793dad94
VP		 3081 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3082 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3083 send_fw_act_open_req(ep, atid);
3084 return;
3085 }
1cab775c
VP		 3086 break;
3087 default:
3088 pr_info("%s unexpected ofld conn wr retval %d\n",
3089 __func__, req->retval);
3090 break;
3091 }
793dad94
VP		 3092 pr_err("active ofld_connect_wr failure %d atid %d\n",
3093 req->retval, atid);
3094 mutex_lock(&dev->rdev.stats.lock);
3095 dev->rdev.stats.act_ofld_conn_fails++;
3096 mutex_unlock(&dev->rdev.stats.lock);
1cab775c 3097 connect_reply_upcall(ep, status2errno(req->retval));
793dad94
VP		 3098 state_set(&ep->com, DEAD);
3099 remove_handle(dev, &dev->atid_idr, atid);
3100 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3101 dst_release(ep->dst);
3102 cxgb4_l2t_release(ep->l2t);
3103 c4iw_put_ep(&ep->com);
1cab775c
VP		 3104}
3105
3106static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3107 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3108{
3109 struct sk_buff *rpl_skb;
3110 struct cpl_pass_accept_req *cpl;
3111 int ret;
3112
710a3110 3113 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
1cab775c
VP		 3114 BUG_ON(!rpl_skb);
3115 if (req->retval) {
3116 PDBG("%s passive open failure %d\n", __func__, req->retval);
793dad94
VP		 3117 mutex_lock(&dev->rdev.stats.lock);
3118 dev->rdev.stats.pas_ofld_conn_fails++;
3119 mutex_unlock(&dev->rdev.stats.lock);
1cab775c
VP		 3120 kfree_skb(rpl_skb);
3121 } else {
3122 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3123 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
ef5d6355
VP		 3124 (__force u32) htonl(
3125 (__force u32) req->tid)));
1cab775c
VP		 3126 ret = pass_accept_req(dev, rpl_skb);
3127 if (!ret)
3128 kfree_skb(rpl_skb);
3129 }
3130 return;
3131}
3132
3133static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2f5b48c3
SW		 3134{
3135 struct cpl_fw6_msg *rpl = cplhdr(skb);
1cab775c
VP		 3136 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3137
3138 switch (rpl->type) {
3139 case FW6_TYPE_CQE:
3140 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3141 break;
3142 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3143 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3144 switch (req->t_state) {
3145 case TCP_SYN_SENT:
3146 active_ofld_conn_reply(dev, skb, req);
3147 break;
3148 case TCP_SYN_RECV:
3149 passive_ofld_conn_reply(dev, skb, req);
3150 break;
3151 default:
3152 pr_err("%s unexpected ofld conn wr state %d\n",
3153 __func__, req->t_state);
3154 break;
3155 }
3156 break;
3157 }
3158 return 0;
3159}
3160
3161static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3162{
3163 u32 l2info;
f079af7a 3164 u16 vlantag, len, hdr_len, eth_hdr_len;
1cab775c
VP		 3165 u8 intf;
3166 struct cpl_rx_pkt *cpl = cplhdr(skb);
3167 struct cpl_pass_accept_req *req;
3168 struct tcp_options_received tmp_opt;
f079af7a 3169 struct c4iw_dev *dev;
1cab775c 3170
f079af7a 3171 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
1cab775c 3172 /* Store values from cpl_rx_pkt in temporary location. */
ef5d6355
VP		 3173 vlantag = (__force u16) cpl->vlan;
3174 len = (__force u16) cpl->len;
3175 l2info = (__force u32) cpl->l2info;
3176 hdr_len = (__force u16) cpl->hdr_len;
1cab775c
VP		 3177 intf = cpl->iff;
3178
3179 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3180
3181 /*
3182 * We need to parse the TCP options from SYN packet.
3183 * to generate cpl_pass_accept_req.
3184 */
3185 memset(&tmp_opt, 0, sizeof(tmp_opt));
3186 tcp_clear_options(&tmp_opt);
1a2c6181 3187 tcp_parse_options(skb, &tmp_opt, 0, NULL);
1cab775c
VP		 3188
3189 req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
3190 memset(req, 0, sizeof(*req));
3191 req->l2info = cpu_to_be16(V_SYN_INTF(intf) |
ef5d6355
VP		 3192 V_SYN_MAC_IDX(G_RX_MACIDX(
3193 (__force int) htonl(l2info))) |
1cab775c 3194 F_SYN_XACT_MATCH);
f079af7a
VP		 3195 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
3196 G_RX_ETHHDR_LEN((__force int) htonl(l2info)) :
3197 G_RX_T5_ETHHDR_LEN((__force int) htonl(l2info));
ef5d6355
VP		 3198 req->hdr_len = cpu_to_be32(V_SYN_RX_CHAN(G_RX_CHAN(
3199 (__force int) htonl(l2info))) |
3200 V_TCP_HDR_LEN(G_RX_TCPHDR_LEN(
3201 (__force int) htons(hdr_len))) |
3202 V_IP_HDR_LEN(G_RX_IPHDR_LEN(
3203 (__force int) htons(hdr_len))) |
f079af7a 3204 V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(eth_hdr_len)));
ef5d6355
VP		 3205 req->vlan = (__force __be16) vlantag;
3206 req->len = (__force __be16) len;
1cab775c
VP		 3207 req->tos_stid = cpu_to_be32(PASS_OPEN_TID(stid) |
3208 PASS_OPEN_TOS(tos));
3209 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3210 if (tmp_opt.wscale_ok)
3211 req->tcpopt.wsf = tmp_opt.snd_wscale;
3212 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3213 if (tmp_opt.sack_ok)
3214 req->tcpopt.sack = 1;
3215 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3216 return;
3217}
3218
3219static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3220 __be32 laddr, __be16 lport,
3221 __be32 raddr, __be16 rport,
3222 u32 rcv_isn, u32 filter, u16 window,
3223 u32 rss_qid, u8 port_id)
3224{
3225 struct sk_buff *req_skb;
3226 struct fw_ofld_connection_wr *req;
3227 struct cpl_pass_accept_req *cpl = cplhdr(skb);
1ce1d471 3228 int ret;
1cab775c
VP		 3229
3230 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
3231 req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
3232 memset(req, 0, sizeof(*req));
3233 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL(1));
3234 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
3235 req->le.version_cpl = htonl(F_FW_OFLD_CONNECTION_WR_CPL);
ef5d6355 3236 req->le.filter = (__force __be32) filter;
1cab775c
VP		 3237 req->le.lport = lport;
3238 req->le.pport = rport;
3239 req->le.u.ipv4.lip = laddr;
3240 req->le.u.ipv4.pip = raddr;
3241 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
3242 req->tcb.rcv_adv = htons(window);
3243 req->tcb.t_state_to_astid =
3244 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_RECV) |
3245 V_FW_OFLD_CONNECTION_WR_RCV_SCALE(cpl->tcpopt.wsf) |
3246 V_FW_OFLD_CONNECTION_WR_ASTID(
3247 GET_PASS_OPEN_TID(ntohl(cpl->tos_stid))));
3248
3249 /*
3250 * We store the qid in opt2 which will be used by the firmware
3251 * to send us the wr response.
3252 */
3253 req->tcb.opt2 = htonl(V_RSS_QUEUE(rss_qid));
3254
3255 /*
3256 * We initialize the MSS index in TCB to 0xF.
3257 * So that when driver sends cpl_pass_accept_rpl
3258 * TCB picks up the correct value. If this was 0
3259 * TP will ignore any value > 0 for MSS index.
3260 */
3261 req->tcb.opt0 = cpu_to_be64(V_MSS_IDX(0xF));
710a3110 3262 req->cookie = (unsigned long)skb;
1cab775c
VP		 3263
3264 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
1ce1d471
SW		 3265 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
3266 if (ret < 0) {
3267 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
3268 ret);
3269 kfree_skb(skb);
3270 kfree_skb(req_skb);
3271 }
1cab775c
VP		 3272}
3273
3274/*
3275 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
3276 * messages when a filter is being used instead of server to
3277 * redirect a syn packet. When packets hit filter they are redirected
3278 * to the offload queue and driver tries to establish the connection
3279 * using firmware work request.
3280 */
3281static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
3282{
3283 int stid;
3284 unsigned int filter;
3285 struct ethhdr *eh = NULL;
3286 struct vlan_ethhdr *vlan_eh = NULL;
3287 struct iphdr *iph;
3288 struct tcphdr *tcph;
3289 struct rss_header *rss = (void *)skb->data;
3290 struct cpl_rx_pkt *cpl = (void *)skb->data;
3291 struct cpl_pass_accept_req *req = (void *)(rss + 1);
3292 struct l2t_entry *e;
3293 struct dst_entry *dst;
1cab775c
VP		 3294 struct c4iw_ep *lep;
3295 u16 window;
3296 struct port_info *pi;
3297 struct net_device *pdev;
f079af7a 3298 u16 rss_qid, eth_hdr_len;
1cab775c
VP		 3299 int step;
3300 u32 tx_chan;
3301 struct neighbour *neigh;
3302
3303 /* Drop all non-SYN packets */
3304 if (!(cpl->l2info & cpu_to_be32(F_RXF_SYN)))
3305 goto reject;
3306
3307 /*
3308 * Drop all packets which did not hit the filter.
3309 * Unlikely to happen.
3310 */
3311 if (!(rss->filter_hit && rss->filter_tid))
3312 goto reject;
3313
3314 /*
3315 * Calculate the server tid from filter hit index from cpl_rx_pkt.
3316 */
a4ea025f 3317 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
1cab775c
VP		 3318
3319 lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid);
3320 if (!lep) {
3321 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
3322 goto reject;
3323 }
3324
f079af7a
VP		 3325 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
3326 G_RX_ETHHDR_LEN(htonl(cpl->l2info)) :
3327 G_RX_T5_ETHHDR_LEN(htonl(cpl->l2info));
3328 if (eth_hdr_len == ETH_HLEN) {
1cab775c
VP		 3329 eh = (struct ethhdr *)(req + 1);
3330 iph = (struct iphdr *)(eh + 1);
3331 } else {
3332 vlan_eh = (struct vlan_ethhdr *)(req + 1);
3333 iph = (struct iphdr *)(vlan_eh + 1);
3334 skb->vlan_tci = ntohs(cpl->vlan);
3335 }
3336
3337 if (iph->version != 0x4)
3338 goto reject;
3339
3340 tcph = (struct tcphdr *)(iph + 1);
3341 skb_set_network_header(skb, (void *)iph - (void *)rss);
3342 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
3343 skb_get(skb);
3344
3345 PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
3346 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
3347 ntohs(tcph->source), iph->tos);
3348
830662f6
VP		 3349 dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
3350 iph->tos);
3351 if (!dst) {
1cab775c
VP		 3352 pr_err("%s - failed to find dst entry!\n",
3353 __func__);
3354 goto reject;
3355 }
1cab775c
VP		 3356 neigh = dst_neigh_lookup_skb(dst, skb);
3357
aaa0c23c
ZZ		 3358 if (!neigh) {
3359 pr_err("%s - failed to allocate neigh!\n",
3360 __func__);
3361 goto free_dst;
3362 }
3363
1cab775c
VP		 3364 if (neigh->dev->flags & IFF_LOOPBACK) {
3365 pdev = ip_dev_find(&init_net, iph->daddr);
3366 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3367 pdev, 0);
3368 pi = (struct port_info *)netdev_priv(pdev);
3369 tx_chan = cxgb4_port_chan(pdev);
3370 dev_put(pdev);
3371 } else {
830662f6 3372 pdev = get_real_dev(neigh->dev);
1cab775c 3373 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
830662f6
VP		 3374 pdev, 0);
3375 pi = (struct port_info *)netdev_priv(pdev);
3376 tx_chan = cxgb4_port_chan(pdev);
1cab775c 3377 }
ebf00060 3378 neigh_release(neigh);
1cab775c
VP		 3379 if (!e) {
3380 pr_err("%s - failed to allocate l2t entry!\n",
3381 __func__);
3382 goto free_dst;
3383 }
3384
3385 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
3386 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
ef5d6355 3387 window = (__force u16) htons((__force u16)tcph->window);
1cab775c
VP		 3388
3389 /* Calcuate filter portion for LE region. */
41b4f86c
KS		 3390 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
3391 dev->rdev.lldi.ports[0],
3392 e));
1cab775c
VP		 3393
3394 /*
3395 * Synthesize the cpl_pass_accept_req. We have everything except the
3396 * TID. Once firmware sends a reply with TID we update the TID field
3397 * in cpl and pass it through the regular cpl_pass_accept_req path.
3398 */
3399 build_cpl_pass_accept_req(skb, stid, iph->tos);
3400 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
3401 tcph->source, ntohl(tcph->seq), filter, window,
3402 rss_qid, pi->port_id);
3403 cxgb4_l2t_release(e);
3404free_dst:
3405 dst_release(dst);
3406reject:
2f5b48c3
SW		 3407 return 0;
3408}
3409
be4c9bad
RD		 3410/*
3411 * These are the real handlers that are called from a
3412 * work queue.
3413 */
3414static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
3415 [CPL_ACT_ESTABLISH] = act_establish,
3416 [CPL_ACT_OPEN_RPL] = act_open_rpl,
3417 [CPL_RX_DATA] = rx_data,
3418 [CPL_ABORT_RPL_RSS] = abort_rpl,
3419 [CPL_ABORT_RPL] = abort_rpl,
3420 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
3421 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
3422 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
3423 [CPL_PASS_ESTABLISH] = pass_establish,
3424 [CPL_PEER_CLOSE] = peer_close,
3425 [CPL_ABORT_REQ_RSS] = peer_abort,
3426 [CPL_CLOSE_CON_RPL] = close_con_rpl,
3427 [CPL_RDMA_TERMINATE] = terminate,
2f5b48c3 3428 [CPL_FW4_ACK] = fw4_ack,
1cab775c
VP		 3429 [CPL_FW6_MSG] = deferred_fw6_msg,
3430 [CPL_RX_PKT] = rx_pkt
be4c9bad
RD		 3431};
3432
3433static void process_timeout(struct c4iw_ep *ep)
3434{
3435 struct c4iw_qp_attributes attrs;
3436 int abort = 1;
3437
2f5b48c3 3438 mutex_lock(&ep->com.mutex);
be4c9bad
RD		 3439 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
3440 ep->com.state);
793dad94 3441 set_bit(TIMEDOUT, &ep->com.history);
be4c9bad
RD		 3442 switch (ep->com.state) {
3443 case MPA_REQ_SENT:
3444 __state_set(&ep->com, ABORTING);
3445 connect_reply_upcall(ep, -ETIMEDOUT);
3446 break;
3447 case MPA_REQ_WAIT:
3448 __state_set(&ep->com, ABORTING);
3449 break;
3450 case CLOSING:
3451 case MORIBUND:
3452 if (ep->com.cm_id && ep->com.qp) {
3453 attrs.next_state = C4IW_QP_STATE_ERROR;
3454 c4iw_modify_qp(ep->com.qp->rhp,
3455 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
3456 &attrs, 1);
3457 }
3458 __state_set(&ep->com, ABORTING);
be13b2df 3459 close_complete_upcall(ep, -ETIMEDOUT);
be4c9bad
RD		 3460 break;
3461 default:
76f267b7 3462 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
be4c9bad 3463 __func__, ep, ep->hwtid, ep->com.state);
be4c9bad
RD		 3464 abort = 0;
3465 }
2f5b48c3 3466 mutex_unlock(&ep->com.mutex);
be4c9bad
RD		 3467 if (abort)
3468 abort_connection(ep, NULL, GFP_KERNEL);
3469 c4iw_put_ep(&ep->com);
3470}
3471
3472static void process_timedout_eps(void)
3473{
3474 struct c4iw_ep *ep;
3475
3476 spin_lock_irq(&timeout_lock);
3477 while (!list_empty(&timeout_list)) {
3478 struct list_head *tmp;
3479
3480 tmp = timeout_list.next;
3481 list_del(tmp);
3482 spin_unlock_irq(&timeout_lock);
3483 ep = list_entry(tmp, struct c4iw_ep, entry);
3484 process_timeout(ep);
3485 spin_lock_irq(&timeout_lock);
3486 }
3487 spin_unlock_irq(&timeout_lock);
3488}
3489
3490static void process_work(struct work_struct *work)
3491{
3492 struct sk_buff *skb = NULL;
3493 struct c4iw_dev *dev;
c1d7356c 3494 struct cpl_act_establish *rpl;
be4c9bad
RD		 3495 unsigned int opcode;
3496 int ret;
3497
3498 while ((skb = skb_dequeue(&rxq))) {
3499 rpl = cplhdr(skb);
3500 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3501 opcode = rpl->ot.opcode;
3502
3503 BUG_ON(!work_handlers[opcode]);
3504 ret = work_handlers[opcode](dev, skb);
3505 if (!ret)
3506 kfree_skb(skb);
3507 }
3508 process_timedout_eps();
3509}
3510
3511static DECLARE_WORK(skb_work, process_work);
3512
3513static void ep_timeout(unsigned long arg)
3514{
3515 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
1ec779cc 3516 int kickit = 0;
be4c9bad
RD		 3517
3518 spin_lock(&timeout_lock);
1ec779cc
VP		 3519 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
3520 list_add_tail(&ep->entry, &timeout_list);
3521 kickit = 1;
3522 }
be4c9bad 3523 spin_unlock(&timeout_lock);
1ec779cc
VP		 3524 if (kickit)
3525 queue_work(workq, &skb_work);
be4c9bad
RD		 3526}
3527
cfdda9d7
SW		 3528/*
3529 * All the CM events are handled on a work queue to have a safe context.
3530 */
3531static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
3532{
3533
3534 /*
3535 * Save dev in the skb->cb area.
3536 */
3537 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
3538
3539 /*
3540 * Queue the skb and schedule the worker thread.
3541 */
3542 skb_queue_tail(&rxq, skb);
3543 queue_work(workq, &skb_work);
3544 return 0;
3545}
3546
3547static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
3548{
3549 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
3550
3551 if (rpl->status != CPL_ERR_NONE) {
3552 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
3553 "for tid %u\n", rpl->status, GET_TID(rpl));
3554 }
2f5b48c3 3555 kfree_skb(skb);
cfdda9d7
SW		 3556 return 0;
3557}
3558
be4c9bad
RD		 3559static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3560{
3561 struct cpl_fw6_msg *rpl = cplhdr(skb);
3562 struct c4iw_wr_wait *wr_waitp;
3563 int ret;
3564
3565 PDBG("%s type %u\n", __func__, rpl->type);
3566
3567 switch (rpl->type) {
5be78ee9 3568 case FW6_TYPE_WR_RPL:
be4c9bad 3569 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
c8e081a1 3570 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
be4c9bad 3571 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
d9594d99
SW		 3572 if (wr_waitp)
3573 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
2f5b48c3 3574 kfree_skb(skb);
be4c9bad 3575 break;
5be78ee9 3576 case FW6_TYPE_CQE:
5be78ee9 3577 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
1cab775c 3578 sched(dev, skb);
5be78ee9 3579 break;
be4c9bad
RD		 3580 default:
3581 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
3582 rpl->type);
2f5b48c3 3583 kfree_skb(skb);
be4c9bad
RD		 3584 break;
3585 }
3586 return 0;
3587}
3588
8da7e7a5
SW		 3589static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
3590{
3591 struct cpl_abort_req_rss *req = cplhdr(skb);
3592 struct c4iw_ep *ep;
3593 struct tid_info *t = dev->rdev.lldi.tids;
3594 unsigned int tid = GET_TID(req);
3595
3596 ep = lookup_tid(t, tid);
14b92228
SW		 3597 if (!ep) {
3598 printk(KERN_WARNING MOD
3599 "Abort on non-existent endpoint, tid %d\n", tid);
3600 kfree_skb(skb);
3601 return 0;
3602 }
8da7e7a5
SW		 3603 if (is_neg_adv_abort(req->status)) {
3604 PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
3605 ep->hwtid);
3606 kfree_skb(skb);
3607 return 0;
3608 }
3609 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
3610 ep->com.state);
3611
3612 /*
3613 * Wake up any threads in rdma_init() or rdma_fini().
7c0a33d6
VP		 3614 * However, if we are on MPAv2 and want to retry with MPAv1
3615 * then, don't wake up yet.
8da7e7a5 3616 */
7c0a33d6
VP		 3617 if (mpa_rev == 2 && !ep->tried_with_mpa_v1) {
3618 if (ep->com.state != MPA_REQ_SENT)
3619 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
3620 } else
3621 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
8da7e7a5
SW		 3622 sched(dev, skb);
3623 return 0;
3624}
3625
be4c9bad
RD		 3626/*
3627 * Most upcalls from the T4 Core go to sched() to
3628 * schedule the processing on a work queue.
3629 */
3630c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
3631 [CPL_ACT_ESTABLISH] = sched,
3632 [CPL_ACT_OPEN_RPL] = sched,
3633 [CPL_RX_DATA] = sched,
3634 [CPL_ABORT_RPL_RSS] = sched,
3635 [CPL_ABORT_RPL] = sched,
3636 [CPL_PASS_OPEN_RPL] = sched,
3637 [CPL_CLOSE_LISTSRV_RPL] = sched,
3638 [CPL_PASS_ACCEPT_REQ] = sched,
3639 [CPL_PASS_ESTABLISH] = sched,
3640 [CPL_PEER_CLOSE] = sched,
3641 [CPL_CLOSE_CON_RPL] = sched,
8da7e7a5 3642 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
be4c9bad
RD		 3643 [CPL_RDMA_TERMINATE] = sched,
3644 [CPL_FW4_ACK] = sched,
3645 [CPL_SET_TCB_RPL] = set_tcb_rpl,
1cab775c
VP		 3646 [CPL_FW6_MSG] = fw6_msg,
3647 [CPL_RX_PKT] = sched
be4c9bad
RD		 3648};
3649
cfdda9d7
SW		 3650int __init c4iw_cm_init(void)
3651{
be4c9bad 3652 spin_lock_init(&timeout_lock);
cfdda9d7
SW		 3653 skb_queue_head_init(&rxq);
3654
3655 workq = create_singlethread_workqueue("iw_cxgb4");
3656 if (!workq)
3657 return -ENOMEM;
3658
cfdda9d7
SW		 3659 return 0;
3660}
3661
3662void __exit c4iw_cm_term(void)
3663{
be4c9bad 3664 WARN_ON(!list_empty(&timeout_list));
cfdda9d7
SW		 3665 flush_workqueue(workq);
3666 destroy_workqueue(workq);
3667}
Linux 6.x block layer and io_uring tree(s)