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iw_cxgb4: set the default MPA version to 2
[deliverable/linux.git] / drivers / infiniband / hw / cxgb4 / cm.c
CommitLineData
cfdda9d7 1/*
9eccfe10 2 * Copyright (c) 2009-2014 Chelsio, Inc. All rights reserved.
cfdda9d7
SW		 3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32#include <linux/module.h>
33#include <linux/list.h>
34#include <linux/workqueue.h>
35#include <linux/skbuff.h>
36#include <linux/timer.h>
37#include <linux/notifier.h>
38#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 49
11b8e22d
SW		 50#include <rdma/ib_addr.h>
51
cfdda9d7
SW		 52#include "iw_cxgb4.h"
53
54static char *states[] = {
55 "idle",
56 "listen",
57 "connecting",
58 "mpa_wait_req",
59 "mpa_req_sent",
60 "mpa_req_rcvd",
61 "mpa_rep_sent",
62 "fpdu_mode",
63 "aborting",
64 "closing",
65 "moribund",
66 "dead",
67 NULL,
68};
69
5be78ee9
VP		 70static int nocong;
71module_param(nocong, int, 0644);
72MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
73
74static int enable_ecn;
75module_param(enable_ecn, int, 0644);
76MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
77
b52fe09e 78static int dack_mode = 1;
ba6d3925 79module_param(dack_mode, int, 0644);
b52fe09e 80MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
ba6d3925 81
4c2c5763 82uint c4iw_max_read_depth = 32;
be4c9bad 83module_param(c4iw_max_read_depth, int, 0644);
4c2c5763
HS		 84MODULE_PARM_DESC(c4iw_max_read_depth,
85 "Per-connection max ORD/IRD (default=32)");
be4c9bad 86
cfdda9d7
SW		 87static int enable_tcp_timestamps;
88module_param(enable_tcp_timestamps, int, 0644);
89MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
90
91static int enable_tcp_sack;
92module_param(enable_tcp_sack, int, 0644);
93MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
94
95static int enable_tcp_window_scaling = 1;
96module_param(enable_tcp_window_scaling, int, 0644);
97MODULE_PARM_DESC(enable_tcp_window_scaling,
98 "Enable tcp window scaling (default=1)");
99
100int c4iw_debug;
101module_param(c4iw_debug, int, 0644);
102MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
103
df2d5130 104static int peer2peer = 1;
cfdda9d7 105module_param(peer2peer, int, 0644);
df2d5130 106MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
cfdda9d7
SW		 107
108static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
109module_param(p2p_type, int, 0644);
110MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
111 "1=RDMA_READ 0=RDMA_WRITE (default 1)");
112
113static int ep_timeout_secs = 60;
114module_param(ep_timeout_secs, int, 0644);
115MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
116 "in seconds (default=60)");
117
b8ac3112 118static int mpa_rev = 2;
cfdda9d7
SW		 119module_param(mpa_rev, int, 0644);
120MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
d2fe99e8 121 "1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft"
b8ac3112 122 " compliant (default=2)");
cfdda9d7
SW		 123
124static int markers_enabled;
125module_param(markers_enabled, int, 0644);
126MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
127
128static int crc_enabled = 1;
129module_param(crc_enabled, int, 0644);
130MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
131
132static int rcv_win = 256 * 1024;
133module_param(rcv_win, int, 0644);
134MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
135
98ae68b7 136static int snd_win = 128 * 1024;
cfdda9d7 137module_param(snd_win, int, 0644);
98ae68b7 138MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
cfdda9d7 139
cfdda9d7 140static struct workqueue_struct *workq;
cfdda9d7
SW		 141
142static struct sk_buff_head rxq;
cfdda9d7
SW		 143
144static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
145static void ep_timeout(unsigned long arg);
146static void connect_reply_upcall(struct c4iw_ep *ep, int status);
147
be4c9bad
RD		 148static LIST_HEAD(timeout_list);
149static spinlock_t timeout_lock;
150
325abead
VP		 151static void deref_qp(struct c4iw_ep *ep)
152{
153 c4iw_qp_rem_ref(&ep->com.qp->ibqp);
154 clear_bit(QP_REFERENCED, &ep->com.flags);
155}
156
157static void ref_qp(struct c4iw_ep *ep)
158{
159 set_bit(QP_REFERENCED, &ep->com.flags);
160 c4iw_qp_add_ref(&ep->com.qp->ibqp);
161}
162
cfdda9d7
SW		 163static void start_ep_timer(struct c4iw_ep *ep)
164{
165 PDBG("%s ep %p\n", __func__, ep);
166 if (timer_pending(&ep->timer)) {
1ec779cc
VP		 167 pr_err("%s timer already started! ep %p\n",
168 __func__, ep);
169 return;
170 }
171 clear_bit(TIMEOUT, &ep->com.flags);
172 c4iw_get_ep(&ep->com);
cfdda9d7
SW		 173 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
174 ep->timer.data = (unsigned long)ep;
175 ep->timer.function = ep_timeout;
176 add_timer(&ep->timer);
177}
178
b33bd0cb 179static int stop_ep_timer(struct c4iw_ep *ep)
cfdda9d7 180{
1ec779cc 181 PDBG("%s ep %p stopping\n", __func__, ep);
cfdda9d7 182 del_timer_sync(&ep->timer);
b33bd0cb 183 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
1ec779cc 184 c4iw_put_ep(&ep->com);
b33bd0cb
SW		 185 return 0;
186 }
187 return 1;
cfdda9d7
SW		 188}
189
190static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
191 struct l2t_entry *l2e)
192{
193 int error = 0;
194
195 if (c4iw_fatal_error(rdev)) {
196 kfree_skb(skb);
197 PDBG("%s - device in error state - dropping\n", __func__);
198 return -EIO;
199 }
200 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
201 if (error < 0)
202 kfree_skb(skb);
74594861 203 return error < 0 ? error : 0;
cfdda9d7
SW		 204}
205
206int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
207{
208 int error = 0;
209
210 if (c4iw_fatal_error(rdev)) {
211 kfree_skb(skb);
212 PDBG("%s - device in error state - dropping\n", __func__);
213 return -EIO;
214 }
215 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
216 if (error < 0)
217 kfree_skb(skb);
74594861 218 return error < 0 ? error : 0;
cfdda9d7
SW		 219}
220
221static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
222{
223 struct cpl_tid_release *req;
224
225 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
226 if (!skb)
227 return;
228 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
229 INIT_TP_WR(req, hwtid);
230 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
231 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
232 c4iw_ofld_send(rdev, skb);
233 return;
234}
235
236static void set_emss(struct c4iw_ep *ep, u16 opt)
237{
6c53e938 238 ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] -
04524a47
H		 239 ((AF_INET == ep->com.remote_addr.ss_family) ?
240 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
241 sizeof(struct tcphdr);
cfdda9d7 242 ep->mss = ep->emss;
6c53e938 243 if (TCPOPT_TSTAMP_G(opt))
04524a47 244 ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
cfdda9d7
SW		 245 if (ep->emss < 128)
246 ep->emss = 128;
92e7ae71
HS		 247 if (ep->emss & 7)
248 PDBG("Warning: misaligned mtu idx %u mss %u emss=%u\n",
6c53e938
HS		 249 TCPOPT_MSS_G(opt), ep->mss, ep->emss);
250 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt),
cfdda9d7
SW		 251 ep->mss, ep->emss);
252}
253
254static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
255{
cfdda9d7
SW		 256 enum c4iw_ep_state state;
257
2f5b48c3 258 mutex_lock(&epc->mutex);
cfdda9d7 259 state = epc->state;
2f5b48c3 260 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 261 return state;
262}
263
264static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
265{
266 epc->state = new;
267}
268
269static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
270{
2f5b48c3 271 mutex_lock(&epc->mutex);
cfdda9d7
SW		 272 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
273 __state_set(epc, new);
2f5b48c3 274 mutex_unlock(&epc->mutex);
cfdda9d7
SW		 275 return;
276}
277
278static void *alloc_ep(int size, gfp_t gfp)
279{
280 struct c4iw_ep_common *epc;
281
282 epc = kzalloc(size, gfp);
283 if (epc) {
284 kref_init(&epc->kref);
2f5b48c3 285 mutex_init(&epc->mutex);
aadc4df3 286 c4iw_init_wr_wait(&epc->wr_wait);
cfdda9d7
SW		 287 }
288 PDBG("%s alloc ep %p\n", __func__, epc);
289 return epc;
290}
291
292void _c4iw_free_ep(struct kref *kref)
293{
294 struct c4iw_ep *ep;
295
296 ep = container_of(kref, struct c4iw_ep, com.kref);
297 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
325abead
VP		 298 if (test_bit(QP_REFERENCED, &ep->com.flags))
299 deref_qp(ep);
cfdda9d7 300 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
fe7e0a4d 301 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
cfdda9d7
SW		 302 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
303 dst_release(ep->dst);
304 cxgb4_l2t_release(ep->l2t);
305 }
9eccfe10
SW		 306 if (test_bit(RELEASE_MAPINFO, &ep->com.flags)) {
307 print_addr(&ep->com, __func__, "remove_mapinfo/mapping");
308 iwpm_remove_mapinfo(&ep->com.local_addr,
309 &ep->com.mapped_local_addr);
310 iwpm_remove_mapping(&ep->com.local_addr, RDMA_NL_C4IW);
311 }
cfdda9d7
SW		 312 kfree(ep);
313}
314
315static void release_ep_resources(struct c4iw_ep *ep)
316{
317 set_bit(RELEASE_RESOURCES, &ep->com.flags);
318 c4iw_put_ep(&ep->com);
319}
320
cfdda9d7
SW		 321static int status2errno(int status)
322{
323 switch (status) {
324 case CPL_ERR_NONE:
325 return 0;
326 case CPL_ERR_CONN_RESET:
327 return -ECONNRESET;
328 case CPL_ERR_ARP_MISS:
329 return -EHOSTUNREACH;
330 case CPL_ERR_CONN_TIMEDOUT:
331 return -ETIMEDOUT;
332 case CPL_ERR_TCAM_FULL:
333 return -ENOMEM;
334 case CPL_ERR_CONN_EXIST:
335 return -EADDRINUSE;
336 default:
337 return -EIO;
338 }
339}
340
341/*
342 * Try and reuse skbs already allocated...
343 */
344static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
345{
346 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
347 skb_trim(skb, 0);
348 skb_get(skb);
349 skb_reset_transport_header(skb);
350 } else {
351 skb = alloc_skb(len, gfp);
352 }
b38a0ad8 353 t4_set_arp_err_handler(skb, NULL, NULL);
cfdda9d7
SW		 354 return skb;
355}
356
830662f6
VP		 357static struct net_device *get_real_dev(struct net_device *egress_dev)
358{
11b8e22d 359 return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
830662f6
VP		 360}
361
362static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
363{
364 int i;
365
366 egress_dev = get_real_dev(egress_dev);
367 for (i = 0; i < dev->rdev.lldi.nports; i++)
368 if (dev->rdev.lldi.ports[i] == egress_dev)
369 return 1;
370 return 0;
371}
372
373static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
374 __u8 *peer_ip, __be16 local_port,
375 __be16 peer_port, u8 tos,
376 __u32 sin6_scope_id)
377{
378 struct dst_entry *dst = NULL;
379
380 if (IS_ENABLED(CONFIG_IPV6)) {
381 struct flowi6 fl6;
382
383 memset(&fl6, 0, sizeof(fl6));
384 memcpy(&fl6.daddr, peer_ip, 16);
385 memcpy(&fl6.saddr, local_ip, 16);
386 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
387 fl6.flowi6_oif = sin6_scope_id;
388 dst = ip6_route_output(&init_net, NULL, &fl6);
389 if (!dst)
390 goto out;
391 if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
392 !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
393 dst_release(dst);
394 dst = NULL;
395 }
396 }
397
398out:
399 return dst;
400}
401
402static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip,
cfdda9d7
SW		 403 __be32 peer_ip, __be16 local_port,
404 __be16 peer_port, u8 tos)
405{
406 struct rtable *rt;
31e4543d 407 struct flowi4 fl4;
830662f6 408 struct neighbour *n;
78fbfd8a 409
31e4543d 410 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
78fbfd8a
DM		 411 peer_port, local_port, IPPROTO_TCP,
412 tos, 0);
b23dd4fe 413 if (IS_ERR(rt))
cfdda9d7 414 return NULL;
830662f6
VP		 415 n = dst_neigh_lookup(&rt->dst, &peer_ip);
416 if (!n)
417 return NULL;
f8e81908
SW		 418 if (!our_interface(dev, n->dev) &&
419 !(n->dev->flags & IFF_LOOPBACK)) {
d480201b 420 neigh_release(n);
830662f6
VP		 421 dst_release(&rt->dst);
422 return NULL;
423 }
424 neigh_release(n);
425 return &rt->dst;
cfdda9d7
SW		 426}
427
428static void arp_failure_discard(void *handle, struct sk_buff *skb)
429{
430 PDBG("%s c4iw_dev %p\n", __func__, handle);
431 kfree_skb(skb);
432}
433
434/*
435 * Handle an ARP failure for an active open.
436 */
437static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
438{
5dab6d3a
H		 439 struct c4iw_ep *ep = handle;
440
cfdda9d7
SW		 441 printk(KERN_ERR MOD "ARP failure duing connect\n");
442 kfree_skb(skb);
5dab6d3a
H		 443 connect_reply_upcall(ep, -EHOSTUNREACH);
444 state_set(&ep->com, DEAD);
445 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
446 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
447 dst_release(ep->dst);
448 cxgb4_l2t_release(ep->l2t);
449 c4iw_put_ep(&ep->com);
cfdda9d7
SW		 450}
451
452/*
453 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
454 * and send it along.
455 */
456static void abort_arp_failure(void *handle, struct sk_buff *skb)
457{
458 struct c4iw_rdev *rdev = handle;
459 struct cpl_abort_req *req = cplhdr(skb);
460
461 PDBG("%s rdev %p\n", __func__, rdev);
462 req->cmd = CPL_ABORT_NO_RST;
463 c4iw_ofld_send(rdev, skb);
464}
465
466static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
467{
468 unsigned int flowclen = 80;
469 struct fw_flowc_wr *flowc;
470 int i;
471
472 skb = get_skb(skb, flowclen, GFP_KERNEL);
473 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
474
e2ac9628
HS		 475 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
476 FW_FLOWC_WR_NPARAMS_V(8));
477 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(DIV_ROUND_UP(flowclen,
478 16)) | FW_WR_FLOWID_V(ep->hwtid));
cfdda9d7
SW		 479
480 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
5167865a 481 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
35b1de55 482 (ep->com.dev->rdev.lldi.pf));
cfdda9d7
SW		 483 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
484 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
485 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
486 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
487 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
488 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
489 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
490 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
491 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
492 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
493 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
b408ff28 494 flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
cfdda9d7
SW		 495 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
496 flowc->mnemval[7].val = cpu_to_be32(ep->emss);
497 /* Pad WR to 16 byte boundary */
498 flowc->mnemval[8].mnemonic = 0;
499 flowc->mnemval[8].val = 0;
500 for (i = 0; i < 9; i++) {
501 flowc->mnemval[i].r4[0] = 0;
502 flowc->mnemval[i].r4[1] = 0;
503 flowc->mnemval[i].r4[2] = 0;
504 }
505
506 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
507 c4iw_ofld_send(&ep->com.dev->rdev, skb);
508}
509
510static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
511{
512 struct cpl_close_con_req *req;
513 struct sk_buff *skb;
514 int wrlen = roundup(sizeof *req, 16);
515
516 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
517 skb = get_skb(NULL, wrlen, gfp);
518 if (!skb) {
519 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
520 return -ENOMEM;
521 }
522 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
523 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
524 req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
525 memset(req, 0, wrlen);
526 INIT_TP_WR(req, ep->hwtid);
527 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
528 ep->hwtid));
529 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
530}
531
532static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
533{
534 struct cpl_abort_req *req;
535 int wrlen = roundup(sizeof *req, 16);
536
537 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
538 skb = get_skb(skb, wrlen, gfp);
539 if (!skb) {
540 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
541 __func__);
542 return -ENOMEM;
543 }
544 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
545 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
546 req = (struct cpl_abort_req *) skb_put(skb, wrlen);
547 memset(req, 0, wrlen);
548 INIT_TP_WR(req, ep->hwtid);
549 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
550 req->cmd = CPL_ABORT_SEND_RST;
551 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
552}
553
9eccfe10
SW		 554/*
555 * c4iw_form_pm_msg - Form a port mapper message with mapping info
556 */
557static void c4iw_form_pm_msg(struct c4iw_ep *ep,
558 struct iwpm_sa_data *pm_msg)
559{
560 memcpy(&pm_msg->loc_addr, &ep->com.local_addr,
561 sizeof(ep->com.local_addr));
562 memcpy(&pm_msg->rem_addr, &ep->com.remote_addr,
563 sizeof(ep->com.remote_addr));
564}
565
566/*
567 * c4iw_form_reg_msg - Form a port mapper message with dev info
568 */
569static void c4iw_form_reg_msg(struct c4iw_dev *dev,
570 struct iwpm_dev_data *pm_msg)
571{
572 memcpy(pm_msg->dev_name, dev->ibdev.name, IWPM_DEVNAME_SIZE);
573 memcpy(pm_msg->if_name, dev->rdev.lldi.ports[0]->name,
574 IWPM_IFNAME_SIZE);
575}
576
577static void c4iw_record_pm_msg(struct c4iw_ep *ep,
578 struct iwpm_sa_data *pm_msg)
579{
580 memcpy(&ep->com.mapped_local_addr, &pm_msg->mapped_loc_addr,
581 sizeof(ep->com.mapped_local_addr));
582 memcpy(&ep->com.mapped_remote_addr, &pm_msg->mapped_rem_addr,
583 sizeof(ep->com.mapped_remote_addr));
584}
585
940fd304 586static int get_remote_addr(struct c4iw_ep *parent_ep, struct c4iw_ep *child_ep)
5b6b8fe6
SW		 587{
588 int ret;
589
940fd304
SW		 590 print_addr(&parent_ep->com, __func__, "get_remote_addr parent_ep ");
591 print_addr(&child_ep->com, __func__, "get_remote_addr child_ep ");
5b6b8fe6 592
940fd304
SW		 593 ret = iwpm_get_remote_info(&parent_ep->com.mapped_local_addr,
594 &child_ep->com.mapped_remote_addr,
595 &child_ep->com.remote_addr, RDMA_NL_C4IW);
5b6b8fe6 596 if (ret)
940fd304 597 PDBG("Unable to find remote peer addr info - err %d\n", ret);
5b6b8fe6
SW		 598
599 return ret;
600}
601
92e7ae71 602static void best_mtu(const unsigned short *mtus, unsigned short mtu,
04524a47 603 unsigned int *idx, int use_ts, int ipv6)
92e7ae71 604{
04524a47
H		 605 unsigned short hdr_size = (ipv6 ?
606 sizeof(struct ipv6hdr) :
607 sizeof(struct iphdr)) +
92e7ae71 608 sizeof(struct tcphdr) +
04524a47
H		 609 (use_ts ?
610 round_up(TCPOLEN_TIMESTAMP, 4) : 0);
92e7ae71
HS		 611 unsigned short data_size = mtu - hdr_size;
612
613 cxgb4_best_aligned_mtu(mtus, hdr_size, data_size, 8, idx);
614}
615
cfdda9d7
SW		 616static int send_connect(struct c4iw_ep *ep)
617{
618 struct cpl_act_open_req *req;
f079af7a 619 struct cpl_t5_act_open_req *t5_req;
830662f6
VP		 620 struct cpl_act_open_req6 *req6;
621 struct cpl_t5_act_open_req6 *t5_req6;
cfdda9d7
SW		 622 struct sk_buff *skb;
623 u64 opt0;
624 u32 opt2;
625 unsigned int mtu_idx;
626 int wscale;
830662f6
VP		 627 int wrlen;
628 int sizev4 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
629 sizeof(struct cpl_act_open_req) :
630 sizeof(struct cpl_t5_act_open_req);
631 int sizev6 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
632 sizeof(struct cpl_act_open_req6) :
633 sizeof(struct cpl_t5_act_open_req6);
9eccfe10
SW		 634 struct sockaddr_in *la = (struct sockaddr_in *)
635 &ep->com.mapped_local_addr;
636 struct sockaddr_in *ra = (struct sockaddr_in *)
637 &ep->com.mapped_remote_addr;
638 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
639 &ep->com.mapped_local_addr;
640 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
641 &ep->com.mapped_remote_addr;
b408ff28 642 int win;
830662f6
VP		 643
644 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
645 roundup(sizev4, 16) :
646 roundup(sizev6, 16);
cfdda9d7
SW		 647
648 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
649
650 skb = get_skb(NULL, wrlen, GFP_KERNEL);
651 if (!skb) {
652 printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
653 __func__);
654 return -ENOMEM;
655 }
d4f1a5c6 656 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
cfdda9d7 657
92e7ae71 658 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
04524a47
H		 659 enable_tcp_timestamps,
660 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
cfdda9d7 661 wscale = compute_wscale(rcv_win);
b408ff28
HS		 662
663 /*
664 * Specify the largest window that will fit in opt0. The
665 * remainder will be specified in the rx_data_ack.
666 */
667 win = ep->rcv_win >> 10;
d7990b0c
AB		 668 if (win > RCV_BUFSIZ_M)
669 win = RCV_BUFSIZ_M;
b408ff28 670
6c53e938 671 opt0 = (nocong ? NO_CONG_F : 0) |
d7990b0c 672 KEEP_ALIVE_F |
6c53e938 673 DELACK_F |
d7990b0c
AB		 674 WND_SCALE_V(wscale) |
675 MSS_IDX_V(mtu_idx) |
676 L2T_IDX_V(ep->l2t->idx) |
677 TX_CHAN_V(ep->tx_chan) |
678 SMAC_SEL_V(ep->smac_idx) |
6c53e938 679 DSCP_V(ep->tos) |
d7990b0c
AB		 680 ULP_MODE_V(ULP_MODE_TCPDDP) |
681 RCV_BUFSIZ_V(win);
682 opt2 = RX_CHANNEL_V(0) |
6c53e938 683 CCTRL_ECN_V(enable_ecn) |
d7990b0c 684 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
cfdda9d7 685 if (enable_tcp_timestamps)
6c53e938 686 opt2 |= TSTAMPS_EN_F;
cfdda9d7 687 if (enable_tcp_sack)
6c53e938 688 opt2 |= SACK_EN_F;
cfdda9d7 689 if (wscale && enable_tcp_window_scaling)
d7990b0c 690 opt2 |= WND_SCALE_EN_F;
92e5011a 691 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
d7990b0c 692 opt2 |= T5_OPT_2_VALID_F;
cf7fe64a 693 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
0b741047 694 opt2 |= T5_ISS_F;
92e5011a 695 }
5dab6d3a 696 t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
cfdda9d7 697
f079af7a 698 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
830662f6
VP		 699 if (ep->com.remote_addr.ss_family == AF_INET) {
700 req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
701 INIT_TP_WR(req, 0);
702 OPCODE_TID(req) = cpu_to_be32(
703 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
704 ((ep->rss_qid << 14) | ep->atid)));
705 req->local_port = la->sin_port;
706 req->peer_port = ra->sin_port;
707 req->local_ip = la->sin_addr.s_addr;
708 req->peer_ip = ra->sin_addr.s_addr;
709 req->opt0 = cpu_to_be64(opt0);
41b4f86c
KS		 710 req->params = cpu_to_be32(cxgb4_select_ntuple(
711 ep->com.dev->rdev.lldi.ports[0],
712 ep->l2t));
830662f6
VP		 713 req->opt2 = cpu_to_be32(opt2);
714 } else {
715 req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
716
717 INIT_TP_WR(req6, 0);
718 OPCODE_TID(req6) = cpu_to_be32(
719 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
720 ((ep->rss_qid<<14)|ep->atid)));
721 req6->local_port = la6->sin6_port;
722 req6->peer_port = ra6->sin6_port;
723 req6->local_ip_hi = *((__be64 *)
724 (la6->sin6_addr.s6_addr));
725 req6->local_ip_lo = *((__be64 *)
726 (la6->sin6_addr.s6_addr + 8));
727 req6->peer_ip_hi = *((__be64 *)
728 (ra6->sin6_addr.s6_addr));
729 req6->peer_ip_lo = *((__be64 *)
730 (ra6->sin6_addr.s6_addr + 8));
731 req6->opt0 = cpu_to_be64(opt0);
41b4f86c
KS		 732 req6->params = cpu_to_be32(cxgb4_select_ntuple(
733 ep->com.dev->rdev.lldi.ports[0],
734 ep->l2t));
830662f6
VP		 735 req6->opt2 = cpu_to_be32(opt2);
736 }
f079af7a 737 } else {
92e7ae71
HS		 738 u32 isn = (prandom_u32() & ~7UL) - 1;
739
92e7ae71
HS		 740 if (peer2peer)
741 isn += 4;
742
830662f6
VP		 743 if (ep->com.remote_addr.ss_family == AF_INET) {
744 t5_req = (struct cpl_t5_act_open_req *)
745 skb_put(skb, wrlen);
746 INIT_TP_WR(t5_req, 0);
747 OPCODE_TID(t5_req) = cpu_to_be32(
f079af7a
VP		 748 MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
749 ((ep->rss_qid << 14) | ep->atid)));
830662f6
VP		 750 t5_req->local_port = la->sin_port;
751 t5_req->peer_port = ra->sin_port;
752 t5_req->local_ip = la->sin_addr.s_addr;
753 t5_req->peer_ip = ra->sin_addr.s_addr;
754 t5_req->opt0 = cpu_to_be64(opt0);
d7990b0c 755 t5_req->params = cpu_to_be64(FILTER_TUPLE_V(
41b4f86c
KS		 756 cxgb4_select_ntuple(
757 ep->com.dev->rdev.lldi.ports[0],
758 ep->l2t)));
92e7ae71
HS		 759 t5_req->rsvd = cpu_to_be32(isn);
760 PDBG("%s snd_isn %u\n", __func__,
761 be32_to_cpu(t5_req->rsvd));
830662f6
VP		 762 t5_req->opt2 = cpu_to_be32(opt2);
763 } else {
764 t5_req6 = (struct cpl_t5_act_open_req6 *)
765 skb_put(skb, wrlen);
766 INIT_TP_WR(t5_req6, 0);
767 OPCODE_TID(t5_req6) = cpu_to_be32(
768 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
769 ((ep->rss_qid<<14)|ep->atid)));
770 t5_req6->local_port = la6->sin6_port;
771 t5_req6->peer_port = ra6->sin6_port;
772 t5_req6->local_ip_hi = *((__be64 *)
773 (la6->sin6_addr.s6_addr));
774 t5_req6->local_ip_lo = *((__be64 *)
775 (la6->sin6_addr.s6_addr + 8));
776 t5_req6->peer_ip_hi = *((__be64 *)
777 (ra6->sin6_addr.s6_addr));
778 t5_req6->peer_ip_lo = *((__be64 *)
779 (ra6->sin6_addr.s6_addr + 8));
780 t5_req6->opt0 = cpu_to_be64(opt0);
d7990b0c 781 t5_req6->params = cpu_to_be64(FILTER_TUPLE_V(
41b4f86c
KS		 782 cxgb4_select_ntuple(
783 ep->com.dev->rdev.lldi.ports[0],
da22b896 784 ep->l2t)));
92e7ae71
HS		 785 t5_req6->rsvd = cpu_to_be32(isn);
786 PDBG("%s snd_isn %u\n", __func__,
787 be32_to_cpu(t5_req6->rsvd));
830662f6
VP		 788 t5_req6->opt2 = cpu_to_be32(opt2);
789 }
f079af7a
VP		 790 }
791
793dad94 792 set_bit(ACT_OPEN_REQ, &ep->com.history);
cfdda9d7
SW		 793 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
794}
795
d2fe99e8
KS		 796static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
797 u8 mpa_rev_to_use)
cfdda9d7
SW		 798{
799 int mpalen, wrlen;
800 struct fw_ofld_tx_data_wr *req;
801 struct mpa_message *mpa;
d2fe99e8 802 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7
SW		 803
804 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
805
806 BUG_ON(skb_cloned(skb));
807
808 mpalen = sizeof(*mpa) + ep->plen;
d2fe99e8
KS		 809 if (mpa_rev_to_use == 2)
810 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 811 wrlen = roundup(mpalen + sizeof *req, 16);
812 skb = get_skb(skb, wrlen, GFP_KERNEL);
813 if (!skb) {
814 connect_reply_upcall(ep, -ENOMEM);
815 return;
816 }
817 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
818
819 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
820 memset(req, 0, wrlen);
821 req->op_to_immdlen = cpu_to_be32(
e2ac9628
HS		 822 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
823 FW_WR_COMPL_F |
824 FW_WR_IMMDLEN_V(mpalen));
cfdda9d7 825 req->flowid_len16 = cpu_to_be32(
e2ac9628
HS		 826 FW_WR_FLOWID_V(ep->hwtid) |
827 FW_WR_LEN16_V(wrlen >> 4));
cfdda9d7
SW		 828 req->plen = cpu_to_be32(mpalen);
829 req->tunnel_to_proxy = cpu_to_be32(
e2ac9628
HS		 830 FW_OFLD_TX_DATA_WR_FLUSH_F |
831 FW_OFLD_TX_DATA_WR_SHOVE_F);
cfdda9d7
SW		 832
833 mpa = (struct mpa_message *)(req + 1);
834 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
835 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
d2fe99e8
KS		 836 (markers_enabled ? MPA_MARKERS : 0) |
837 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
cfdda9d7 838 mpa->private_data_size = htons(ep->plen);
d2fe99e8 839 mpa->revision = mpa_rev_to_use;
01b225e1 840 if (mpa_rev_to_use == 1) {
d2fe99e8 841 ep->tried_with_mpa_v1 = 1;
01b225e1
KS		 842 ep->retry_with_mpa_v1 = 0;
843 }
d2fe99e8
KS		 844
845 if (mpa_rev_to_use == 2) {
f747c34a
RD		 846 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
847 sizeof (struct mpa_v2_conn_params));
4c2c5763
HS		 848 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
849 ep->ord);
d2fe99e8
KS		 850 mpa_v2_params.ird = htons((u16)ep->ird);
851 mpa_v2_params.ord = htons((u16)ep->ord);
852
853 if (peer2peer) {
854 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
855 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
856 mpa_v2_params.ord |=
857 htons(MPA_V2_RDMA_WRITE_RTR);
858 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
859 mpa_v2_params.ord |=
860 htons(MPA_V2_RDMA_READ_RTR);
861 }
862 memcpy(mpa->private_data, &mpa_v2_params,
863 sizeof(struct mpa_v2_conn_params));
cfdda9d7 864
d2fe99e8
KS		 865 if (ep->plen)
866 memcpy(mpa->private_data +
867 sizeof(struct mpa_v2_conn_params),
868 ep->mpa_pkt + sizeof(*mpa), ep->plen);
869 } else
870 if (ep->plen)
871 memcpy(mpa->private_data,
872 ep->mpa_pkt + sizeof(*mpa), ep->plen);
cfdda9d7
SW		 873
874 /*
875 * Reference the mpa skb. This ensures the data area
876 * will remain in memory until the hw acks the tx.
877 * Function fw4_ack() will deref it.
878 */
879 skb_get(skb);
880 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
881 BUG_ON(ep->mpa_skb);
882 ep->mpa_skb = skb;
883 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
884 start_ep_timer(ep);
a7db89eb 885 __state_set(&ep->com, MPA_REQ_SENT);
cfdda9d7 886 ep->mpa_attr.initiator = 1;
9c88aa00 887 ep->snd_seq += mpalen;
cfdda9d7
SW		 888 return;
889}
890
891static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
892{
893 int mpalen, wrlen;
894 struct fw_ofld_tx_data_wr *req;
895 struct mpa_message *mpa;
896 struct sk_buff *skb;
d2fe99e8 897 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7
SW		 898
899 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
900
901 mpalen = sizeof(*mpa) + plen;
d2fe99e8
KS		 902 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
903 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 904 wrlen = roundup(mpalen + sizeof *req, 16);
905
906 skb = get_skb(NULL, wrlen, GFP_KERNEL);
907 if (!skb) {
908 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
909 return -ENOMEM;
910 }
911 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
912
913 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
914 memset(req, 0, wrlen);
915 req->op_to_immdlen = cpu_to_be32(
e2ac9628
HS		 916 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
917 FW_WR_COMPL_F |
918 FW_WR_IMMDLEN_V(mpalen));
cfdda9d7 919 req->flowid_len16 = cpu_to_be32(
e2ac9628
HS		 920 FW_WR_FLOWID_V(ep->hwtid) |
921 FW_WR_LEN16_V(wrlen >> 4));
cfdda9d7
SW		 922 req->plen = cpu_to_be32(mpalen);
923 req->tunnel_to_proxy = cpu_to_be32(
e2ac9628
HS		 924 FW_OFLD_TX_DATA_WR_FLUSH_F |
925 FW_OFLD_TX_DATA_WR_SHOVE_F);
cfdda9d7
SW		 926
927 mpa = (struct mpa_message *)(req + 1);
928 memset(mpa, 0, sizeof(*mpa));
929 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
930 mpa->flags = MPA_REJECT;
fe7e0a4d 931 mpa->revision = ep->mpa_attr.version;
cfdda9d7 932 mpa->private_data_size = htons(plen);
d2fe99e8
KS		 933
934 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
935 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
f747c34a
RD		 936 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
937 sizeof (struct mpa_v2_conn_params));
d2fe99e8
KS		 938 mpa_v2_params.ird = htons(((u16)ep->ird) |
939 (peer2peer ? MPA_V2_PEER2PEER_MODEL :
940 0));
941 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
942 (p2p_type ==
943 FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
944 MPA_V2_RDMA_WRITE_RTR : p2p_type ==
945 FW_RI_INIT_P2PTYPE_READ_REQ ?
946 MPA_V2_RDMA_READ_RTR : 0) : 0));
947 memcpy(mpa->private_data, &mpa_v2_params,
948 sizeof(struct mpa_v2_conn_params));
949
950 if (ep->plen)
951 memcpy(mpa->private_data +
952 sizeof(struct mpa_v2_conn_params), pdata, plen);
953 } else
954 if (plen)
955 memcpy(mpa->private_data, pdata, plen);
cfdda9d7
SW		 956
957 /*
958 * Reference the mpa skb again. This ensures the data area
959 * will remain in memory until the hw acks the tx.
960 * Function fw4_ack() will deref it.
961 */
962 skb_get(skb);
963 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
964 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
965 BUG_ON(ep->mpa_skb);
966 ep->mpa_skb = skb;
9c88aa00 967 ep->snd_seq += mpalen;
cfdda9d7
SW		 968 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
969}
970
971static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
972{
973 int mpalen, wrlen;
974 struct fw_ofld_tx_data_wr *req;
975 struct mpa_message *mpa;
976 struct sk_buff *skb;
d2fe99e8 977 struct mpa_v2_conn_params mpa_v2_params;
cfdda9d7
SW		 978
979 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
980
981 mpalen = sizeof(*mpa) + plen;
d2fe99e8
KS		 982 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
983 mpalen += sizeof(struct mpa_v2_conn_params);
cfdda9d7
SW		 984 wrlen = roundup(mpalen + sizeof *req, 16);
985
986 skb = get_skb(NULL, wrlen, GFP_KERNEL);
987 if (!skb) {
988 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
989 return -ENOMEM;
990 }
991 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
992
993 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
994 memset(req, 0, wrlen);
995 req->op_to_immdlen = cpu_to_be32(
e2ac9628
HS		 996 FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
997 FW_WR_COMPL_F |
998 FW_WR_IMMDLEN_V(mpalen));
cfdda9d7 999 req->flowid_len16 = cpu_to_be32(
e2ac9628
HS		 1000 FW_WR_FLOWID_V(ep->hwtid) |
1001 FW_WR_LEN16_V(wrlen >> 4));
cfdda9d7
SW		 1002 req->plen = cpu_to_be32(mpalen);
1003 req->tunnel_to_proxy = cpu_to_be32(
e2ac9628
HS		 1004 FW_OFLD_TX_DATA_WR_FLUSH_F |
1005 FW_OFLD_TX_DATA_WR_SHOVE_F);
cfdda9d7
SW		 1006
1007 mpa = (struct mpa_message *)(req + 1);
1008 memset(mpa, 0, sizeof(*mpa));
1009 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
1010 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
1011 (markers_enabled ? MPA_MARKERS : 0);
d2fe99e8 1012 mpa->revision = ep->mpa_attr.version;
cfdda9d7 1013 mpa->private_data_size = htons(plen);
d2fe99e8
KS		 1014
1015 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
1016 mpa->flags |= MPA_ENHANCED_RDMA_CONN;
f747c34a
RD		 1017 mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
1018 sizeof (struct mpa_v2_conn_params));
d2fe99e8
KS		 1019 mpa_v2_params.ird = htons((u16)ep->ird);
1020 mpa_v2_params.ord = htons((u16)ep->ord);
1021 if (peer2peer && (ep->mpa_attr.p2p_type !=
1022 FW_RI_INIT_P2PTYPE_DISABLED)) {
1023 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
1024
1025 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
1026 mpa_v2_params.ord |=
1027 htons(MPA_V2_RDMA_WRITE_RTR);
1028 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
1029 mpa_v2_params.ord |=
1030 htons(MPA_V2_RDMA_READ_RTR);
1031 }
1032
1033 memcpy(mpa->private_data, &mpa_v2_params,
1034 sizeof(struct mpa_v2_conn_params));
1035
1036 if (ep->plen)
1037 memcpy(mpa->private_data +
1038 sizeof(struct mpa_v2_conn_params), pdata, plen);
1039 } else
1040 if (plen)
1041 memcpy(mpa->private_data, pdata, plen);
cfdda9d7
SW		 1042
1043 /*
1044 * Reference the mpa skb. This ensures the data area
1045 * will remain in memory until the hw acks the tx.
1046 * Function fw4_ack() will deref it.
1047 */
1048 skb_get(skb);
1049 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
1050 ep->mpa_skb = skb;
a7db89eb 1051 __state_set(&ep->com, MPA_REP_SENT);
9c88aa00 1052 ep->snd_seq += mpalen;
cfdda9d7
SW		 1053 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1054}
1055
1056static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
1057{
1058 struct c4iw_ep *ep;
1059 struct cpl_act_establish *req = cplhdr(skb);
1060 unsigned int tid = GET_TID(req);
6c53e938 1061 unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
cfdda9d7
SW		 1062 struct tid_info *t = dev->rdev.lldi.tids;
1063
1064 ep = lookup_atid(t, atid);
1065
1066 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
1067 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
1068
a7db89eb 1069 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1070 dst_confirm(ep->dst);
1071
1072 /* setup the hwtid for this connection */
1073 ep->hwtid = tid;
1074 cxgb4_insert_tid(t, ep, tid);
793dad94 1075 insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
cfdda9d7
SW		 1076
1077 ep->snd_seq = be32_to_cpu(req->snd_isn);
1078 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
1079
1080 set_emss(ep, ntohs(req->tcp_opt));
1081
1082 /* dealloc the atid */
793dad94 1083 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
cfdda9d7 1084 cxgb4_free_atid(t, atid);
793dad94 1085 set_bit(ACT_ESTAB, &ep->com.history);
cfdda9d7
SW		 1086
1087 /* start MPA negotiation */
1088 send_flowc(ep, NULL);
d2fe99e8
KS		 1089 if (ep->retry_with_mpa_v1)
1090 send_mpa_req(ep, skb, 1);
1091 else
1092 send_mpa_req(ep, skb, mpa_rev);
a7db89eb 1093 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1094 return 0;
1095}
1096
be13b2df 1097static void close_complete_upcall(struct c4iw_ep *ep, int status)
cfdda9d7
SW		 1098{
1099 struct iw_cm_event event;
1100
1101 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1102 memset(&event, 0, sizeof(event));
1103 event.event = IW_CM_EVENT_CLOSE;
be13b2df 1104 event.status = status;
cfdda9d7
SW		 1105 if (ep->com.cm_id) {
1106 PDBG("close complete delivered ep %p cm_id %p tid %u\n",
1107 ep, ep->com.cm_id, ep->hwtid);
1108 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1109 ep->com.cm_id->rem_ref(ep->com.cm_id);
1110 ep->com.cm_id = NULL;
793dad94 1111 set_bit(CLOSE_UPCALL, &ep->com.history);
cfdda9d7
SW		 1112 }
1113}
1114
1115static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
1116{
1117 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
cc18b939 1118 __state_set(&ep->com, ABORTING);
793dad94 1119 set_bit(ABORT_CONN, &ep->com.history);
cfdda9d7
SW		 1120 return send_abort(ep, skb, gfp);
1121}
1122
1123static void peer_close_upcall(struct c4iw_ep *ep)
1124{
1125 struct iw_cm_event event;
1126
1127 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1128 memset(&event, 0, sizeof(event));
1129 event.event = IW_CM_EVENT_DISCONNECT;
1130 if (ep->com.cm_id) {
1131 PDBG("peer close delivered ep %p cm_id %p tid %u\n",
1132 ep, ep->com.cm_id, ep->hwtid);
1133 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
793dad94 1134 set_bit(DISCONN_UPCALL, &ep->com.history);
cfdda9d7
SW		 1135 }
1136}
1137
1138static void peer_abort_upcall(struct c4iw_ep *ep)
1139{
1140 struct iw_cm_event event;
1141
1142 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1143 memset(&event, 0, sizeof(event));
1144 event.event = IW_CM_EVENT_CLOSE;
1145 event.status = -ECONNRESET;
1146 if (ep->com.cm_id) {
1147 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
1148 ep->com.cm_id, ep->hwtid);
1149 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1150 ep->com.cm_id->rem_ref(ep->com.cm_id);
1151 ep->com.cm_id = NULL;
793dad94 1152 set_bit(ABORT_UPCALL, &ep->com.history);
cfdda9d7
SW		 1153 }
1154}
1155
1156static void connect_reply_upcall(struct c4iw_ep *ep, int status)
1157{
1158 struct iw_cm_event event;
1159
1160 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
1161 memset(&event, 0, sizeof(event));
1162 event.event = IW_CM_EVENT_CONNECT_REPLY;
1163 event.status = status;
24d44a39
SW		 1164 memcpy(&event.local_addr, &ep->com.local_addr,
1165 sizeof(ep->com.local_addr));
1166 memcpy(&event.remote_addr, &ep->com.remote_addr,
1167 sizeof(ep->com.remote_addr));
cfdda9d7
SW		 1168
1169 if ((status == 0) || (status == -ECONNREFUSED)) {
d2fe99e8
KS		 1170 if (!ep->tried_with_mpa_v1) {
1171 /* this means MPA_v2 is used */
1172 event.private_data_len = ep->plen -
1173 sizeof(struct mpa_v2_conn_params);
1174 event.private_data = ep->mpa_pkt +
1175 sizeof(struct mpa_message) +
1176 sizeof(struct mpa_v2_conn_params);
1177 } else {
1178 /* this means MPA_v1 is used */
1179 event.private_data_len = ep->plen;
1180 event.private_data = ep->mpa_pkt +
1181 sizeof(struct mpa_message);
1182 }
cfdda9d7 1183 }
85963e4c
RD		 1184
1185 PDBG("%s ep %p tid %u status %d\n", __func__, ep,
1186 ep->hwtid, status);
793dad94 1187 set_bit(CONN_RPL_UPCALL, &ep->com.history);
85963e4c
RD		 1188 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
1189
cfdda9d7
SW		 1190 if (status < 0) {
1191 ep->com.cm_id->rem_ref(ep->com.cm_id);
1192 ep->com.cm_id = NULL;
cfdda9d7
SW		 1193 }
1194}
1195
be13b2df 1196static int connect_request_upcall(struct c4iw_ep *ep)
cfdda9d7
SW		 1197{
1198 struct iw_cm_event event;
be13b2df 1199 int ret;
cfdda9d7
SW		 1200
1201 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1202 memset(&event, 0, sizeof(event));
1203 event.event = IW_CM_EVENT_CONNECT_REQUEST;
24d44a39
SW		 1204 memcpy(&event.local_addr, &ep->com.local_addr,
1205 sizeof(ep->com.local_addr));
1206 memcpy(&event.remote_addr, &ep->com.remote_addr,
1207 sizeof(ep->com.remote_addr));
cfdda9d7 1208 event.provider_data = ep;
d2fe99e8
KS		 1209 if (!ep->tried_with_mpa_v1) {
1210 /* this means MPA_v2 is used */
1211 event.ord = ep->ord;
1212 event.ird = ep->ird;
1213 event.private_data_len = ep->plen -
1214 sizeof(struct mpa_v2_conn_params);
1215 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
1216 sizeof(struct mpa_v2_conn_params);
1217 } else {
1218 /* this means MPA_v1 is used. Send max supported */
4c2c5763
HS		 1219 event.ord = cur_max_read_depth(ep->com.dev);
1220 event.ird = cur_max_read_depth(ep->com.dev);
d2fe99e8
KS		 1221 event.private_data_len = ep->plen;
1222 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
1223 }
be13b2df
SW		 1224 c4iw_get_ep(&ep->com);
1225 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
1226 &event);
1227 if (ret)
1228 c4iw_put_ep(&ep->com);
793dad94 1229 set_bit(CONNREQ_UPCALL, &ep->com.history);
cfdda9d7 1230 c4iw_put_ep(&ep->parent_ep->com);
be13b2df 1231 return ret;
cfdda9d7
SW		 1232}
1233
1234static void established_upcall(struct c4iw_ep *ep)
1235{
1236 struct iw_cm_event event;
1237
1238 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1239 memset(&event, 0, sizeof(event));
1240 event.event = IW_CM_EVENT_ESTABLISHED;
d2fe99e8
KS		 1241 event.ird = ep->ird;
1242 event.ord = ep->ord;
cfdda9d7
SW		 1243 if (ep->com.cm_id) {
1244 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1245 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
793dad94 1246 set_bit(ESTAB_UPCALL, &ep->com.history);
cfdda9d7
SW		 1247 }
1248}
1249
1250static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
1251{
1252 struct cpl_rx_data_ack *req;
1253 struct sk_buff *skb;
1254 int wrlen = roundup(sizeof *req, 16);
1255
1256 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
1257 skb = get_skb(NULL, wrlen, GFP_KERNEL);
1258 if (!skb) {
1259 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
1260 return 0;
1261 }
1262
b408ff28
HS		 1263 /*
1264 * If we couldn't specify the entire rcv window at connection setup
1265 * due to the limit in the number of bits in the RCV_BUFSIZ field,
1266 * then add the overage in to the credits returned.
1267 */
d7990b0c
AB		 1268 if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
1269 credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
b408ff28 1270
cfdda9d7
SW		 1271 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
1272 memset(req, 0, wrlen);
1273 INIT_TP_WR(req, ep->hwtid);
1274 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
1275 ep->hwtid));
d7990b0c 1276 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK_F |
cf7fe64a
HS		 1277 RX_DACK_CHANGE_F |
1278 RX_DACK_MODE_V(dack_mode));
d4f1a5c6 1279 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
cfdda9d7
SW		 1280 c4iw_ofld_send(&ep->com.dev->rdev, skb);
1281 return credits;
1282}
1283
4c2c5763
HS		 1284#define RELAXED_IRD_NEGOTIATION 1
1285
cc18b939 1286static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
cfdda9d7
SW		 1287{
1288 struct mpa_message *mpa;
d2fe99e8 1289 struct mpa_v2_conn_params *mpa_v2_params;
cfdda9d7 1290 u16 plen;
d2fe99e8
KS		 1291 u16 resp_ird, resp_ord;
1292 u8 rtr_mismatch = 0, insuff_ird = 0;
cfdda9d7
SW		 1293 struct c4iw_qp_attributes attrs;
1294 enum c4iw_qp_attr_mask mask;
1295 int err;
cc18b939 1296 int disconnect = 0;
cfdda9d7
SW		 1297
1298 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1299
1300 /*
b33bd0cb
SW		 1301 * Stop mpa timer. If it expired, then
1302 * we ignore the MPA reply. process_timeout()
1303 * will abort the connection.
cfdda9d7 1304 */
b33bd0cb 1305 if (stop_ep_timer(ep))
cc18b939 1306 return 0;
cfdda9d7
SW		 1307
1308 /*
1309 * If we get more than the supported amount of private data
1310 * then we must fail this connection.
1311 */
1312 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
1313 err = -EINVAL;
1314 goto err;
1315 }
1316
1317 /*
1318 * copy the new data into our accumulation buffer.
1319 */
1320 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1321 skb->len);
1322 ep->mpa_pkt_len += skb->len;
1323
1324 /*
1325 * if we don't even have the mpa message, then bail.
1326 */
1327 if (ep->mpa_pkt_len < sizeof(*mpa))
cc18b939 1328 return 0;
cfdda9d7
SW		 1329 mpa = (struct mpa_message *) ep->mpa_pkt;
1330
1331 /* Validate MPA header. */
d2fe99e8
KS		 1332 if (mpa->revision > mpa_rev) {
1333 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1334 " Received = %d\n", __func__, mpa_rev, mpa->revision);
cfdda9d7
SW		 1335 err = -EPROTO;
1336 goto err;
1337 }
1338 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
1339 err = -EPROTO;
1340 goto err;
1341 }
1342
1343 plen = ntohs(mpa->private_data_size);
1344
1345 /*
1346 * Fail if there's too much private data.
1347 */
1348 if (plen > MPA_MAX_PRIVATE_DATA) {
1349 err = -EPROTO;
1350 goto err;
1351 }
1352
1353 /*
1354 * If plen does not account for pkt size
1355 */
1356 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1357 err = -EPROTO;
1358 goto err;
1359 }
1360
1361 ep->plen = (u8) plen;
1362
1363 /*
1364 * If we don't have all the pdata yet, then bail.
1365 * We'll continue process when more data arrives.
1366 */
1367 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
cc18b939 1368 return 0;
cfdda9d7
SW		 1369
1370 if (mpa->flags & MPA_REJECT) {
1371 err = -ECONNREFUSED;
1372 goto err;
1373 }
1374
1375 /*
1376 * If we get here we have accumulated the entire mpa
1377 * start reply message including private data. And
1378 * the MPA header is valid.
1379 */
c529fb50 1380 __state_set(&ep->com, FPDU_MODE);
cfdda9d7
SW		 1381 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1382 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1383 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
d2fe99e8
KS		 1384 ep->mpa_attr.version = mpa->revision;
1385 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1386
1387 if (mpa->revision == 2) {
1388 ep->mpa_attr.enhanced_rdma_conn =
1389 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1390 if (ep->mpa_attr.enhanced_rdma_conn) {
1391 mpa_v2_params = (struct mpa_v2_conn_params *)
1392 (ep->mpa_pkt + sizeof(*mpa));
1393 resp_ird = ntohs(mpa_v2_params->ird) &
1394 MPA_V2_IRD_ORD_MASK;
1395 resp_ord = ntohs(mpa_v2_params->ord) &
1396 MPA_V2_IRD_ORD_MASK;
4c2c5763
HS		 1397 PDBG("%s responder ird %u ord %u ep ird %u ord %u\n",
1398 __func__, resp_ird, resp_ord, ep->ird, ep->ord);
d2fe99e8
KS		 1399
1400 /*
1401 * This is a double-check. Ideally, below checks are
1402 * not required since ird/ord stuff has been taken
1403 * care of in c4iw_accept_cr
1404 */
4c2c5763
HS		 1405 if (ep->ird < resp_ord) {
1406 if (RELAXED_IRD_NEGOTIATION && resp_ord <=
1407 ep->com.dev->rdev.lldi.max_ordird_qp)
1408 ep->ird = resp_ord;
1409 else
1410 insuff_ird = 1;
1411 } else if (ep->ird > resp_ord) {
1412 ep->ird = resp_ord;
1413 }
1414 if (ep->ord > resp_ird) {
1415 if (RELAXED_IRD_NEGOTIATION)
1416 ep->ord = resp_ird;
1417 else
1418 insuff_ird = 1;
1419 }
1420 if (insuff_ird) {
d2fe99e8
KS		 1421 err = -ENOMEM;
1422 ep->ird = resp_ord;
1423 ep->ord = resp_ird;
d2fe99e8
KS		 1424 }
1425
1426 if (ntohs(mpa_v2_params->ird) &
1427 MPA_V2_PEER2PEER_MODEL) {
1428 if (ntohs(mpa_v2_params->ord) &
1429 MPA_V2_RDMA_WRITE_RTR)
1430 ep->mpa_attr.p2p_type =
1431 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1432 else if (ntohs(mpa_v2_params->ord) &
1433 MPA_V2_RDMA_READ_RTR)
1434 ep->mpa_attr.p2p_type =
1435 FW_RI_INIT_P2PTYPE_READ_REQ;
1436 }
1437 }
1438 } else if (mpa->revision == 1)
1439 if (peer2peer)
1440 ep->mpa_attr.p2p_type = p2p_type;
1441
cfdda9d7 1442 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
d2fe99e8
KS		 1443 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
1444 "%d\n", __func__, ep->mpa_attr.crc_enabled,
1445 ep->mpa_attr.recv_marker_enabled,
1446 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1447 ep->mpa_attr.p2p_type, p2p_type);
1448
1449 /*
1450 * If responder's RTR does not match with that of initiator, assign
1451 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
1452 * generated when moving QP to RTS state.
1453 * A TERM message will be sent after QP has moved to RTS state
1454 */
91018f86 1455 if ((ep->mpa_attr.version == 2) && peer2peer &&
d2fe99e8
KS		 1456 (ep->mpa_attr.p2p_type != p2p_type)) {
1457 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1458 rtr_mismatch = 1;
1459 }
cfdda9d7
SW		 1460
1461 attrs.mpa_attr = ep->mpa_attr;
1462 attrs.max_ird = ep->ird;
1463 attrs.max_ord = ep->ord;
1464 attrs.llp_stream_handle = ep;
1465 attrs.next_state = C4IW_QP_STATE_RTS;
1466
1467 mask = C4IW_QP_ATTR_NEXT_STATE |
1468 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
1469 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
1470
1471 /* bind QP and TID with INIT_WR */
1472 err = c4iw_modify_qp(ep->com.qp->rhp,
1473 ep->com.qp, mask, &attrs, 1);
1474 if (err)
1475 goto err;
d2fe99e8
KS		 1476
1477 /*
1478 * If responder's RTR requirement did not match with what initiator
1479 * supports, generate TERM message
1480 */
1481 if (rtr_mismatch) {
1482 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
1483 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1484 attrs.ecode = MPA_NOMATCH_RTR;
1485 attrs.next_state = C4IW_QP_STATE_TERMINATE;
cc18b939 1486 attrs.send_term = 1;
d2fe99e8 1487 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
cc18b939 1488 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
d2fe99e8 1489 err = -ENOMEM;
cc18b939 1490 disconnect = 1;
d2fe99e8
KS		 1491 goto out;
1492 }
1493
1494 /*
1495 * Generate TERM if initiator IRD is not sufficient for responder
1496 * provided ORD. Currently, we do the same behaviour even when
1497 * responder provided IRD is also not sufficient as regards to
1498 * initiator ORD.
1499 */
1500 if (insuff_ird) {
1501 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
1502 __func__);
1503 attrs.layer_etype = LAYER_MPA | DDP_LLP;
1504 attrs.ecode = MPA_INSUFF_IRD;
1505 attrs.next_state = C4IW_QP_STATE_TERMINATE;
cc18b939 1506 attrs.send_term = 1;
d2fe99e8 1507 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
cc18b939 1508 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
d2fe99e8 1509 err = -ENOMEM;
cc18b939 1510 disconnect = 1;
d2fe99e8
KS		 1511 goto out;
1512 }
cfdda9d7
SW		 1513 goto out;
1514err:
c529fb50 1515 __state_set(&ep->com, ABORTING);
b21ef16a 1516 send_abort(ep, skb, GFP_KERNEL);
cfdda9d7
SW		 1517out:
1518 connect_reply_upcall(ep, err);
cc18b939 1519 return disconnect;
cfdda9d7
SW		 1520}
1521
1522static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
1523{
1524 struct mpa_message *mpa;
d2fe99e8 1525 struct mpa_v2_conn_params *mpa_v2_params;
cfdda9d7
SW		 1526 u16 plen;
1527
1528 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1529
cfdda9d7
SW		 1530 /*
1531 * If we get more than the supported amount of private data
1532 * then we must fail this connection.
1533 */
1534 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
b33bd0cb 1535 (void)stop_ep_timer(ep);
cfdda9d7
SW		 1536 abort_connection(ep, skb, GFP_KERNEL);
1537 return;
1538 }
1539
1540 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
1541
1542 /*
1543 * Copy the new data into our accumulation buffer.
1544 */
1545 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
1546 skb->len);
1547 ep->mpa_pkt_len += skb->len;
1548
1549 /*
1550 * If we don't even have the mpa message, then bail.
1551 * We'll continue process when more data arrives.
1552 */
1553 if (ep->mpa_pkt_len < sizeof(*mpa))
1554 return;
1555
1556 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
cfdda9d7
SW		 1557 mpa = (struct mpa_message *) ep->mpa_pkt;
1558
1559 /*
1560 * Validate MPA Header.
1561 */
d2fe99e8
KS		 1562 if (mpa->revision > mpa_rev) {
1563 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
1564 " Received = %d\n", __func__, mpa_rev, mpa->revision);
b33bd0cb 1565 (void)stop_ep_timer(ep);
cfdda9d7
SW		 1566 abort_connection(ep, skb, GFP_KERNEL);
1567 return;
1568 }
1569
1570 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
b33bd0cb 1571 (void)stop_ep_timer(ep);
cfdda9d7
SW		 1572 abort_connection(ep, skb, GFP_KERNEL);
1573 return;
1574 }
1575
1576 plen = ntohs(mpa->private_data_size);
1577
1578 /*
1579 * Fail if there's too much private data.
1580 */
1581 if (plen > MPA_MAX_PRIVATE_DATA) {
b33bd0cb 1582 (void)stop_ep_timer(ep);
cfdda9d7
SW		 1583 abort_connection(ep, skb, GFP_KERNEL);
1584 return;
1585 }
1586
1587 /*
1588 * If plen does not account for pkt size
1589 */
1590 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
b33bd0cb 1591 (void)stop_ep_timer(ep);
cfdda9d7
SW		 1592 abort_connection(ep, skb, GFP_KERNEL);
1593 return;
1594 }
1595 ep->plen = (u8) plen;
1596
1597 /*
1598 * If we don't have all the pdata yet, then bail.
1599 */
1600 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1601 return;
1602
1603 /*
1604 * If we get here we have accumulated the entire mpa
1605 * start reply message including private data.
1606 */
1607 ep->mpa_attr.initiator = 0;
1608 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1609 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1610 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
d2fe99e8
KS		 1611 ep->mpa_attr.version = mpa->revision;
1612 if (mpa->revision == 1)
1613 ep->tried_with_mpa_v1 = 1;
1614 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
1615
1616 if (mpa->revision == 2) {
1617 ep->mpa_attr.enhanced_rdma_conn =
1618 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
1619 if (ep->mpa_attr.enhanced_rdma_conn) {
1620 mpa_v2_params = (struct mpa_v2_conn_params *)
1621 (ep->mpa_pkt + sizeof(*mpa));
1622 ep->ird = ntohs(mpa_v2_params->ird) &
1623 MPA_V2_IRD_ORD_MASK;
1624 ep->ord = ntohs(mpa_v2_params->ord) &
1625 MPA_V2_IRD_ORD_MASK;
4c2c5763
HS		 1626 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
1627 ep->ord);
d2fe99e8
KS		 1628 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
1629 if (peer2peer) {
1630 if (ntohs(mpa_v2_params->ord) &
1631 MPA_V2_RDMA_WRITE_RTR)
1632 ep->mpa_attr.p2p_type =
1633 FW_RI_INIT_P2PTYPE_RDMA_WRITE;
1634 else if (ntohs(mpa_v2_params->ord) &
1635 MPA_V2_RDMA_READ_RTR)
1636 ep->mpa_attr.p2p_type =
1637 FW_RI_INIT_P2PTYPE_READ_REQ;
1638 }
1639 }
1640 } else if (mpa->revision == 1)
1641 if (peer2peer)
1642 ep->mpa_attr.p2p_type = p2p_type;
1643
cfdda9d7
SW		 1644 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
1645 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
1646 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1647 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
1648 ep->mpa_attr.p2p_type);
1649
b33bd0cb
SW		 1650 /*
1651 * If the endpoint timer already expired, then we ignore
1652 * the start request. process_timeout() will abort
1653 * the connection.
1654 */
1655 if (!stop_ep_timer(ep)) {
1656 __state_set(&ep->com, MPA_REQ_RCVD);
1657
1658 /* drive upcall */
10be6b48
HS		 1659 mutex_lock_nested(&ep->parent_ep->com.mutex,
1660 SINGLE_DEPTH_NESTING);
b33bd0cb
SW		 1661 if (ep->parent_ep->com.state != DEAD) {
1662 if (connect_request_upcall(ep))
1663 abort_connection(ep, skb, GFP_KERNEL);
1664 } else {
be13b2df 1665 abort_connection(ep, skb, GFP_KERNEL);
b33bd0cb
SW		 1666 }
1667 mutex_unlock(&ep->parent_ep->com.mutex);
be13b2df 1668 }
cfdda9d7
SW		 1669 return;
1670}
1671
1672static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
1673{
1674 struct c4iw_ep *ep;
1675 struct cpl_rx_data *hdr = cplhdr(skb);
1676 unsigned int dlen = ntohs(hdr->len);
1677 unsigned int tid = GET_TID(hdr);
1678 struct tid_info *t = dev->rdev.lldi.tids;
793dad94 1679 __u8 status = hdr->status;
cc18b939 1680 int disconnect = 0;
cfdda9d7
SW		 1681
1682 ep = lookup_tid(t, tid);
977116c6
SW		 1683 if (!ep)
1684 return 0;
cfdda9d7
SW		 1685 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
1686 skb_pull(skb, sizeof(*hdr));
1687 skb_trim(skb, dlen);
c529fb50 1688 mutex_lock(&ep->com.mutex);
cfdda9d7 1689
cfdda9d7
SW		 1690 /* update RX credits */
1691 update_rx_credits(ep, dlen);
1692
c529fb50 1693 switch (ep->com.state) {
cfdda9d7 1694 case MPA_REQ_SENT:
55abf8df 1695 ep->rcv_seq += dlen;
cc18b939 1696 disconnect = process_mpa_reply(ep, skb);
cfdda9d7
SW		 1697 break;
1698 case MPA_REQ_WAIT:
55abf8df 1699 ep->rcv_seq += dlen;
cfdda9d7
SW		 1700 process_mpa_request(ep, skb);
1701 break;
1557967b
VP		 1702 case FPDU_MODE: {
1703 struct c4iw_qp_attributes attrs;
1704 BUG_ON(!ep->com.qp);
e8e5b927 1705 if (status)
1557967b 1706 pr_err("%s Unexpected streaming data." \
04236df2
VP		 1707 " qpid %u ep %p state %d tid %u status %d\n",
1708 __func__, ep->com.qp->wq.sq.qid, ep,
c529fb50 1709 ep->com.state, ep->hwtid, status);
97d7ec0c 1710 attrs.next_state = C4IW_QP_STATE_TERMINATE;
1557967b 1711 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
cc18b939
SW		 1712 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
1713 disconnect = 1;
cfdda9d7
SW		 1714 break;
1715 }
1557967b
VP		 1716 default:
1717 break;
1718 }
c529fb50 1719 mutex_unlock(&ep->com.mutex);
cc18b939
SW		 1720 if (disconnect)
1721 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
cfdda9d7
SW		 1722 return 0;
1723}
1724
1725static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
1726{
1727 struct c4iw_ep *ep;
1728 struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
cfdda9d7
SW		 1729 int release = 0;
1730 unsigned int tid = GET_TID(rpl);
1731 struct tid_info *t = dev->rdev.lldi.tids;
1732
1733 ep = lookup_tid(t, tid);
4984037b
VP		 1734 if (!ep) {
1735 printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
1736 return 0;
1737 }
92dd6c3d 1738 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2f5b48c3 1739 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 1740 switch (ep->com.state) {
1741 case ABORTING:
91e9c071 1742 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 1743 __state_set(&ep->com, DEAD);
1744 release = 1;
1745 break;
1746 default:
1747 printk(KERN_ERR "%s ep %p state %d\n",
1748 __func__, ep, ep->com.state);
1749 break;
1750 }
2f5b48c3 1751 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 1752
1753 if (release)
1754 release_ep_resources(ep);
1755 return 0;
1756}
1757
5be78ee9
VP		 1758static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
1759{
1760 struct sk_buff *skb;
1761 struct fw_ofld_connection_wr *req;
1762 unsigned int mtu_idx;
1763 int wscale;
830662f6 1764 struct sockaddr_in *sin;
b408ff28 1765 int win;
5be78ee9
VP		 1766
1767 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1768 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
1769 memset(req, 0, sizeof(*req));
6c53e938 1770 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
e2ac9628 1771 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
41b4f86c
KS		 1772 req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
1773 ep->com.dev->rdev.lldi.ports[0],
5be78ee9 1774 ep->l2t));
9eccfe10 1775 sin = (struct sockaddr_in *)&ep->com.mapped_local_addr;
830662f6
VP		 1776 req->le.lport = sin->sin_port;
1777 req->le.u.ipv4.lip = sin->sin_addr.s_addr;
9eccfe10 1778 sin = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
830662f6
VP		 1779 req->le.pport = sin->sin_port;
1780 req->le.u.ipv4.pip = sin->sin_addr.s_addr;
5be78ee9 1781 req->tcb.t_state_to_astid =
77a80e23
HS		 1782 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
1783 FW_OFLD_CONNECTION_WR_ASTID_V(atid));
5be78ee9 1784 req->tcb.cplrxdataack_cplpassacceptrpl =
77a80e23 1785 htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
ef5d6355 1786 req->tcb.tx_max = (__force __be32) jiffies;
793dad94 1787 req->tcb.rcv_adv = htons(1);
92e7ae71 1788 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
04524a47
H		 1789 enable_tcp_timestamps,
1790 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
5be78ee9 1791 wscale = compute_wscale(rcv_win);
b408ff28
HS		 1792
1793 /*
1794 * Specify the largest window that will fit in opt0. The
1795 * remainder will be specified in the rx_data_ack.
1796 */
1797 win = ep->rcv_win >> 10;
d7990b0c
AB		 1798 if (win > RCV_BUFSIZ_M)
1799 win = RCV_BUFSIZ_M;
b408ff28 1800
6c53e938
HS		 1801 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
1802 (nocong ? NO_CONG_F : 0) |
d7990b0c 1803 KEEP_ALIVE_F |
6c53e938 1804 DELACK_F |
d7990b0c
AB		 1805 WND_SCALE_V(wscale) |
1806 MSS_IDX_V(mtu_idx) |
1807 L2T_IDX_V(ep->l2t->idx) |
1808 TX_CHAN_V(ep->tx_chan) |
1809 SMAC_SEL_V(ep->smac_idx) |
6c53e938 1810 DSCP_V(ep->tos) |
d7990b0c
AB		 1811 ULP_MODE_V(ULP_MODE_TCPDDP) |
1812 RCV_BUFSIZ_V(win));
6c53e938
HS		 1813 req->tcb.opt2 = (__force __be32) (PACE_V(1) |
1814 TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
d7990b0c 1815 RX_CHANNEL_V(0) |
6c53e938 1816 CCTRL_ECN_V(enable_ecn) |
d7990b0c 1817 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
5be78ee9 1818 if (enable_tcp_timestamps)
6c53e938 1819 req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
5be78ee9 1820 if (enable_tcp_sack)
6c53e938 1821 req->tcb.opt2 |= (__force __be32)SACK_EN_F;
5be78ee9 1822 if (wscale && enable_tcp_window_scaling)
d7990b0c
AB		 1823 req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
1824 req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
1825 req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
793dad94
VP		 1826 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
1827 set_bit(ACT_OFLD_CONN, &ep->com.history);
5be78ee9
VP		 1828 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
1829}
1830
cfdda9d7
SW		 1831/*
1832 * Return whether a failed active open has allocated a TID
1833 */
1834static inline int act_open_has_tid(int status)
1835{
1836 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1837 status != CPL_ERR_ARP_MISS;
1838}
1839
7a2cea2a
SW		 1840/* Returns whether a CPL status conveys negative advice.
1841 */
1842static int is_neg_adv(unsigned int status)
1843{
1844 return status == CPL_ERR_RTX_NEG_ADVICE ||
1845 status == CPL_ERR_PERSIST_NEG_ADVICE ||
1846 status == CPL_ERR_KEEPALV_NEG_ADVICE;
1847}
1848
dd92b124
HS		 1849static char *neg_adv_str(unsigned int status)
1850{
1851 switch (status) {
1852 case CPL_ERR_RTX_NEG_ADVICE:
1853 return "Retransmit timeout";
1854 case CPL_ERR_PERSIST_NEG_ADVICE:
1855 return "Persist timeout";
1856 case CPL_ERR_KEEPALV_NEG_ADVICE:
1857 return "Keepalive timeout";
1858 default:
1859 return "Unknown";
1860 }
1861}
1862
b408ff28
HS		 1863static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
1864{
1865 ep->snd_win = snd_win;
1866 ep->rcv_win = rcv_win;
1867 PDBG("%s snd_win %d rcv_win %d\n", __func__, ep->snd_win, ep->rcv_win);
1868}
1869
793dad94
VP		 1870#define ACT_OPEN_RETRY_COUNT 2
1871
830662f6
VP		 1872static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
1873 struct dst_entry *dst, struct c4iw_dev *cdev,
1874 bool clear_mpa_v1)
1875{
1876 struct neighbour *n;
1877 int err, step;
1878 struct net_device *pdev;
1879
1880 n = dst_neigh_lookup(dst, peer_ip);
1881 if (!n)
1882 return -ENODEV;
1883
1884 rcu_read_lock();
1885 err = -ENOMEM;
1886 if (n->dev->flags & IFF_LOOPBACK) {
1887 if (iptype == 4)
1888 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
1889 else if (IS_ENABLED(CONFIG_IPV6))
1890 for_each_netdev(&init_net, pdev) {
1891 if (ipv6_chk_addr(&init_net,
1892 (struct in6_addr *)peer_ip,
1893 pdev, 1))
1894 break;
1895 }
1896 else
1897 pdev = NULL;
1898
1899 if (!pdev) {
1900 err = -ENODEV;
1901 goto out;
1902 }
1903 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1904 n, pdev, 0);
1905 if (!ep->l2t)
1906 goto out;
1907 ep->mtu = pdev->mtu;
1908 ep->tx_chan = cxgb4_port_chan(pdev);
1909 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
1910 step = cdev->rdev.lldi.ntxq /
1911 cdev->rdev.lldi.nchan;
1912 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1913 step = cdev->rdev.lldi.nrxq /
1914 cdev->rdev.lldi.nchan;
1915 ep->ctrlq_idx = cxgb4_port_idx(pdev);
1916 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
1917 cxgb4_port_idx(pdev) * step];
b408ff28 1918 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
830662f6
VP		 1919 dev_put(pdev);
1920 } else {
1921 pdev = get_real_dev(n->dev);
1922 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
1923 n, pdev, 0);
1924 if (!ep->l2t)
1925 goto out;
1926 ep->mtu = dst_mtu(dst);
11b8e22d
SW		 1927 ep->tx_chan = cxgb4_port_chan(pdev);
1928 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
830662f6
VP		 1929 step = cdev->rdev.lldi.ntxq /
1930 cdev->rdev.lldi.nchan;
11b8e22d
SW		 1931 ep->txq_idx = cxgb4_port_idx(pdev) * step;
1932 ep->ctrlq_idx = cxgb4_port_idx(pdev);
830662f6
VP		 1933 step = cdev->rdev.lldi.nrxq /
1934 cdev->rdev.lldi.nchan;
1935 ep->rss_qid = cdev->rdev.lldi.rxq_ids[
11b8e22d 1936 cxgb4_port_idx(pdev) * step];
b408ff28 1937 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
830662f6
VP		 1938
1939 if (clear_mpa_v1) {
1940 ep->retry_with_mpa_v1 = 0;
1941 ep->tried_with_mpa_v1 = 0;
1942 }
1943 }
1944 err = 0;
1945out:
1946 rcu_read_unlock();
1947
1948 neigh_release(n);
1949
1950 return err;
1951}
1952
793dad94
VP		 1953static int c4iw_reconnect(struct c4iw_ep *ep)
1954{
1955 int err = 0;
24d44a39
SW		 1956 struct sockaddr_in *laddr = (struct sockaddr_in *)
1957 &ep->com.cm_id->local_addr;
1958 struct sockaddr_in *raddr = (struct sockaddr_in *)
1959 &ep->com.cm_id->remote_addr;
830662f6
VP		 1960 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
1961 &ep->com.cm_id->local_addr;
1962 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
1963 &ep->com.cm_id->remote_addr;
1964 int iptype;
1965 __u8 *ra;
793dad94
VP		 1966
1967 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
1968 init_timer(&ep->timer);
1969
1970 /*
1971 * Allocate an active TID to initiate a TCP connection.
1972 */
1973 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
1974 if (ep->atid == -1) {
1975 pr_err("%s - cannot alloc atid.\n", __func__);
1976 err = -ENOMEM;
1977 goto fail2;
1978 }
1979 insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
1980
1981 /* find a route */
830662f6
VP		 1982 if (ep->com.cm_id->local_addr.ss_family == AF_INET) {
1983 ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
1984 raddr->sin_addr.s_addr, laddr->sin_port,
1985 raddr->sin_port, 0);
1986 iptype = 4;
1987 ra = (__u8 *)&raddr->sin_addr;
1988 } else {
1989 ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
1990 raddr6->sin6_addr.s6_addr,
1991 laddr6->sin6_port, raddr6->sin6_port, 0,
1992 raddr6->sin6_scope_id);
1993 iptype = 6;
1994 ra = (__u8 *)&raddr6->sin6_addr;
1995 }
1996 if (!ep->dst) {
793dad94
VP		 1997 pr_err("%s - cannot find route.\n", __func__);
1998 err = -EHOSTUNREACH;
1999 goto fail3;
2000 }
830662f6
VP		 2001 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false);
2002 if (err) {
793dad94 2003 pr_err("%s - cannot alloc l2e.\n", __func__);
793dad94
VP		 2004 goto fail4;
2005 }
2006
2007 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
2008 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
2009 ep->l2t->idx);
2010
2011 state_set(&ep->com, CONNECTING);
2012 ep->tos = 0;
2013
2014 /* send connect request to rnic */
2015 err = send_connect(ep);
2016 if (!err)
2017 goto out;
2018
2019 cxgb4_l2t_release(ep->l2t);
2020fail4:
2021 dst_release(ep->dst);
2022fail3:
2023 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
2024 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
2025fail2:
2026 /*
2027 * remember to send notification to upper layer.
2028 * We are in here so the upper layer is not aware that this is
2029 * re-connect attempt and so, upper layer is still waiting for
2030 * response of 1st connect request.
2031 */
2032 connect_reply_upcall(ep, -ECONNRESET);
2033 c4iw_put_ep(&ep->com);
2034out:
2035 return err;
2036}
2037
cfdda9d7
SW		 2038static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2039{
2040 struct c4iw_ep *ep;
2041 struct cpl_act_open_rpl *rpl = cplhdr(skb);
6c53e938
HS		 2042 unsigned int atid = TID_TID_G(AOPEN_ATID_G(
2043 ntohl(rpl->atid_status)));
cfdda9d7 2044 struct tid_info *t = dev->rdev.lldi.tids;
6c53e938 2045 int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
830662f6
VP		 2046 struct sockaddr_in *la;
2047 struct sockaddr_in *ra;
2048 struct sockaddr_in6 *la6;
2049 struct sockaddr_in6 *ra6;
cfdda9d7
SW		 2050
2051 ep = lookup_atid(t, atid);
9eccfe10
SW		 2052 la = (struct sockaddr_in *)&ep->com.mapped_local_addr;
2053 ra = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
2054 la6 = (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
2055 ra6 = (struct sockaddr_in6 *)&ep->com.mapped_remote_addr;
cfdda9d7
SW		 2056
2057 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
2058 status, status2errno(status));
2059
7a2cea2a 2060 if (is_neg_adv(status)) {
179d03bb
H		 2061 PDBG("%s Connection problems for atid %u status %u (%s)\n",
2062 __func__, atid, status, neg_adv_str(status));
2063 ep->stats.connect_neg_adv++;
2064 mutex_lock(&dev->rdev.stats.lock);
2065 dev->rdev.stats.neg_adv++;
2066 mutex_unlock(&dev->rdev.stats.lock);
cfdda9d7
SW		 2067 return 0;
2068 }
2069
793dad94
VP		 2070 set_bit(ACT_OPEN_RPL, &ep->com.history);
2071
d716a2a0
VP		 2072 /*
2073 * Log interesting failures.
2074 */
2075 switch (status) {
2076 case CPL_ERR_CONN_RESET:
2077 case CPL_ERR_CONN_TIMEDOUT:
2078 break;
5be78ee9 2079 case CPL_ERR_TCAM_FULL:
830662f6 2080 mutex_lock(&dev->rdev.stats.lock);
3b174d94 2081 dev->rdev.stats.tcam_full++;
830662f6
VP		 2082 mutex_unlock(&dev->rdev.stats.lock);
2083 if (ep->com.local_addr.ss_family == AF_INET &&
2084 dev->rdev.lldi.enable_fw_ofld_conn) {
793dad94 2085 send_fw_act_open_req(ep,
6c53e938 2086 TID_TID_G(AOPEN_ATID_G(
793dad94
VP		 2087 ntohl(rpl->atid_status))));
2088 return 0;
2089 }
2090 break;
2091 case CPL_ERR_CONN_EXIST:
2092 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
2093 set_bit(ACT_RETRY_INUSE, &ep->com.history);
2094 remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
2095 atid);
2096 cxgb4_free_atid(t, atid);
2097 dst_release(ep->dst);
2098 cxgb4_l2t_release(ep->l2t);
2099 c4iw_reconnect(ep);
2100 return 0;
2101 }
5be78ee9 2102 break;
d716a2a0 2103 default:
830662f6
VP		 2104 if (ep->com.local_addr.ss_family == AF_INET) {
2105 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
2106 atid, status, status2errno(status),
2107 &la->sin_addr.s_addr, ntohs(la->sin_port),
2108 &ra->sin_addr.s_addr, ntohs(ra->sin_port));
2109 } else {
2110 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
2111 atid, status, status2errno(status),
2112 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
2113 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
2114 }
d716a2a0
VP		 2115 break;
2116 }
2117
cfdda9d7
SW		 2118 connect_reply_upcall(ep, status2errno(status));
2119 state_set(&ep->com, DEAD);
2120
2121 if (status && act_open_has_tid(status))
2122 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
2123
793dad94 2124 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
cfdda9d7
SW		 2125 cxgb4_free_atid(t, atid);
2126 dst_release(ep->dst);
2127 cxgb4_l2t_release(ep->l2t);
2128 c4iw_put_ep(&ep->com);
2129
2130 return 0;
2131}
2132
2133static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2134{
2135 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
2136 struct tid_info *t = dev->rdev.lldi.tids;
2137 unsigned int stid = GET_TID(rpl);
2138 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
2139
2140 if (!ep) {
1cab775c
VP		 2141 PDBG("%s stid %d lookup failure!\n", __func__, stid);
2142 goto out;
cfdda9d7
SW		 2143 }
2144 PDBG("%s ep %p status %d error %d\n", __func__, ep,
2145 rpl->status, status2errno(rpl->status));
d9594d99 2146 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
cfdda9d7 2147
1cab775c 2148out:
cfdda9d7
SW		 2149 return 0;
2150}
2151
cfdda9d7
SW		 2152static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2153{
2154 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
2155 struct tid_info *t = dev->rdev.lldi.tids;
2156 unsigned int stid = GET_TID(rpl);
2157 struct c4iw_listen_ep *ep = lookup_stid(t, stid);
2158
2159 PDBG("%s ep %p\n", __func__, ep);
d9594d99 2160 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
cfdda9d7
SW		 2161 return 0;
2162}
2163
830662f6 2164static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
cfdda9d7
SW		 2165 struct cpl_pass_accept_req *req)
2166{
2167 struct cpl_pass_accept_rpl *rpl;
2168 unsigned int mtu_idx;
2169 u64 opt0;
2170 u32 opt2;
2171 int wscale;
92e7ae71 2172 struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
b408ff28 2173 int win;
cfdda9d7
SW		 2174
2175 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2176 BUG_ON(skb_cloned(skb));
92e7ae71 2177
cfdda9d7 2178 skb_get(skb);
92e7ae71
HS		 2179 rpl = cplhdr(skb);
2180 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
2181 skb_trim(skb, roundup(sizeof(*rpl5), 16));
2182 rpl5 = (void *)rpl;
2183 INIT_TP_WR(rpl5, ep->hwtid);
2184 } else {
2185 skb_trim(skb, sizeof(*rpl));
2186 INIT_TP_WR(rpl, ep->hwtid);
2187 }
2188 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
2189 ep->hwtid));
2190
2191 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
04524a47
H		 2192 enable_tcp_timestamps && req->tcpopt.tstamp,
2193 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
cfdda9d7 2194 wscale = compute_wscale(rcv_win);
b408ff28
HS		 2195
2196 /*
2197 * Specify the largest window that will fit in opt0. The
2198 * remainder will be specified in the rx_data_ack.
2199 */
2200 win = ep->rcv_win >> 10;
d7990b0c
AB		 2201 if (win > RCV_BUFSIZ_M)
2202 win = RCV_BUFSIZ_M;
6c53e938 2203 opt0 = (nocong ? NO_CONG_F : 0) |
d7990b0c 2204 KEEP_ALIVE_F |
6c53e938 2205 DELACK_F |
d7990b0c
AB		 2206 WND_SCALE_V(wscale) |
2207 MSS_IDX_V(mtu_idx) |
2208 L2T_IDX_V(ep->l2t->idx) |
2209 TX_CHAN_V(ep->tx_chan) |
2210 SMAC_SEL_V(ep->smac_idx) |
6c53e938 2211 DSCP_V(ep->tos >> 2) |
d7990b0c
AB		 2212 ULP_MODE_V(ULP_MODE_TCPDDP) |
2213 RCV_BUFSIZ_V(win);
2214 opt2 = RX_CHANNEL_V(0) |
2215 RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
cfdda9d7
SW		 2216
2217 if (enable_tcp_timestamps && req->tcpopt.tstamp)
6c53e938 2218 opt2 |= TSTAMPS_EN_F;
cfdda9d7 2219 if (enable_tcp_sack && req->tcpopt.sack)
6c53e938 2220 opt2 |= SACK_EN_F;
cfdda9d7 2221 if (wscale && enable_tcp_window_scaling)
d7990b0c 2222 opt2 |= WND_SCALE_EN_F;
5be78ee9
VP		 2223 if (enable_ecn) {
2224 const struct tcphdr *tcph;
2225 u32 hlen = ntohl(req->hdr_len);
2226
cf7fe64a
HS		 2227 tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
2228 IP_HDR_LEN_G(hlen);
5be78ee9 2229 if (tcph->ece && tcph->cwr)
6c53e938 2230 opt2 |= CCTRL_ECN_V(1);
5be78ee9 2231 }
92e5011a 2232 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
92e7ae71 2233 u32 isn = (prandom_u32() & ~7UL) - 1;
d7990b0c 2234 opt2 |= T5_OPT_2_VALID_F;
cf7fe64a 2235 opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
0b741047 2236 opt2 |= T5_ISS_F;
92e7ae71
HS		 2237 rpl5 = (void *)rpl;
2238 memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16));
2239 if (peer2peer)
2240 isn += 4;
2241 rpl5->iss = cpu_to_be32(isn);
2242 PDBG("%s iss %u\n", __func__, be32_to_cpu(rpl5->iss));
92e5011a 2243 }
cfdda9d7 2244
cfdda9d7
SW		 2245 rpl->opt0 = cpu_to_be64(opt0);
2246 rpl->opt2 = cpu_to_be32(opt2);
d4f1a5c6 2247 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
b38a0ad8 2248 t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
cfdda9d7
SW		 2249 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
2250
2251 return;
2252}
2253
830662f6 2254static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
cfdda9d7 2255{
830662f6 2256 PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
cfdda9d7
SW		 2257 BUG_ON(skb_cloned(skb));
2258 skb_trim(skb, sizeof(struct cpl_tid_release));
cfdda9d7
SW		 2259 release_tid(&dev->rdev, hwtid, skb);
2260 return;
2261}
2262
830662f6
VP		 2263static void get_4tuple(struct cpl_pass_accept_req *req, int *iptype,
2264 __u8 *local_ip, __u8 *peer_ip,
cfdda9d7
SW		 2265 __be16 *local_port, __be16 *peer_port)
2266{
cf7fe64a
HS		 2267 int eth_len = ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len));
2268 int ip_len = IP_HDR_LEN_G(be32_to_cpu(req->hdr_len));
cfdda9d7 2269 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
830662f6 2270 struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
cfdda9d7
SW		 2271 struct tcphdr *tcp = (struct tcphdr *)
2272 ((u8 *)(req + 1) + eth_len + ip_len);
2273
830662f6
VP		 2274 if (ip->version == 4) {
2275 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
2276 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
2277 ntohs(tcp->dest));
2278 *iptype = 4;
2279 memcpy(peer_ip, &ip->saddr, 4);
2280 memcpy(local_ip, &ip->daddr, 4);
2281 } else {
2282 PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
2283 ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
2284 ntohs(tcp->dest));
2285 *iptype = 6;
2286 memcpy(peer_ip, ip6->saddr.s6_addr, 16);
2287 memcpy(local_ip, ip6->daddr.s6_addr, 16);
2288 }
cfdda9d7
SW		 2289 *peer_port = tcp->source;
2290 *local_port = tcp->dest;
2291
2292 return;
2293}
2294
2295static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
2296{
793dad94 2297 struct c4iw_ep *child_ep = NULL, *parent_ep;
cfdda9d7 2298 struct cpl_pass_accept_req *req = cplhdr(skb);
6c53e938 2299 unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
cfdda9d7
SW		 2300 struct tid_info *t = dev->rdev.lldi.tids;
2301 unsigned int hwtid = GET_TID(req);
2302 struct dst_entry *dst;
830662f6 2303 __u8 local_ip[16], peer_ip[16];
cfdda9d7 2304 __be16 local_port, peer_port;
3786cf18 2305 int err;
1cab775c 2306 u16 peer_mss = ntohs(req->tcpopt.mss);
830662f6 2307 int iptype;
92e7ae71 2308 unsigned short hdrs;
cfdda9d7
SW		 2309
2310 parent_ep = lookup_stid(t, stid);
1cab775c
VP		 2311 if (!parent_ep) {
2312 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
2313 goto reject;
2314 }
1cab775c 2315
cfdda9d7
SW		 2316 if (state_read(&parent_ep->com) != LISTEN) {
2317 printk(KERN_ERR "%s - listening ep not in LISTEN\n",
2318 __func__);
2319 goto reject;
2320 }
2321
830662f6
VP		 2322 get_4tuple(req, &iptype, local_ip, peer_ip, &local_port, &peer_port);
2323
cfdda9d7 2324 /* Find output route */
830662f6
VP		 2325 if (iptype == 4) {
2326 PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
2327 , __func__, parent_ep, hwtid,
2328 local_ip, peer_ip, ntohs(local_port),
2329 ntohs(peer_port), peer_mss);
2330 dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
2331 local_port, peer_port,
6c53e938 2332 PASS_OPEN_TOS_G(ntohl(req->tos_stid)));
830662f6
VP		 2333 } else {
2334 PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
2335 , __func__, parent_ep, hwtid,
2336 local_ip, peer_ip, ntohs(local_port),
2337 ntohs(peer_port), peer_mss);
2338 dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
6c53e938 2339 PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
830662f6
VP		 2340 ((struct sockaddr_in6 *)
2341 &parent_ep->com.local_addr)->sin6_scope_id);
2342 }
2343 if (!dst) {
cfdda9d7
SW		 2344 printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
2345 __func__);
2346 goto reject;
2347 }
3786cf18
DM		 2348
2349 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
2350 if (!child_ep) {
2351 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
cfdda9d7
SW		 2352 __func__);
2353 dst_release(dst);
2354 goto reject;
2355 }
2356
830662f6 2357 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false);
3786cf18
DM		 2358 if (err) {
2359 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
cfdda9d7 2360 __func__);
cfdda9d7 2361 dst_release(dst);
3786cf18 2362 kfree(child_ep);
cfdda9d7
SW		 2363 goto reject;
2364 }
3786cf18 2365
92e7ae71
HS		 2366 hdrs = sizeof(struct iphdr) + sizeof(struct tcphdr) +
2367 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
2368 if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
2369 child_ep->mtu = peer_mss + hdrs;
1cab775c 2370
cfdda9d7
SW		 2371 state_set(&child_ep->com, CONNECTING);
2372 child_ep->com.dev = dev;
2373 child_ep->com.cm_id = NULL;
5b6b8fe6
SW		 2374
2375 /*
2376 * The mapped_local and mapped_remote addresses get setup with
2377 * the actual 4-tuple. The local address will be based on the
2378 * actual local address of the connection, but on the port number
2379 * of the parent listening endpoint. The remote address is
2380 * setup based on a query to the IWPM since we don't know what it
2381 * originally was before mapping. If no mapping was done, then
2382 * mapped_remote == remote, and mapped_local == local.
2383 */
830662f6
VP		 2384 if (iptype == 4) {
2385 struct sockaddr_in *sin = (struct sockaddr_in *)
5b6b8fe6
SW		 2386 &child_ep->com.mapped_local_addr;
2387
830662f6
VP		 2388 sin->sin_family = PF_INET;
2389 sin->sin_port = local_port;
2390 sin->sin_addr.s_addr = *(__be32 *)local_ip;
5b6b8fe6
SW		 2391
2392 sin = (struct sockaddr_in *)&child_ep->com.local_addr;
2393 sin->sin_family = PF_INET;
2394 sin->sin_port = ((struct sockaddr_in *)
2395 &parent_ep->com.local_addr)->sin_port;
2396 sin->sin_addr.s_addr = *(__be32 *)local_ip;
2397
2398 sin = (struct sockaddr_in *)&child_ep->com.mapped_remote_addr;
830662f6
VP		 2399 sin->sin_family = PF_INET;
2400 sin->sin_port = peer_port;
2401 sin->sin_addr.s_addr = *(__be32 *)peer_ip;
2402 } else {
2403 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
5b6b8fe6
SW		 2404 &child_ep->com.mapped_local_addr;
2405
830662f6
VP		 2406 sin6->sin6_family = PF_INET6;
2407 sin6->sin6_port = local_port;
2408 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
5b6b8fe6
SW		 2409
2410 sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
2411 sin6->sin6_family = PF_INET6;
2412 sin6->sin6_port = ((struct sockaddr_in6 *)
2413 &parent_ep->com.local_addr)->sin6_port;
2414 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
2415
2416 sin6 = (struct sockaddr_in6 *)&child_ep->com.mapped_remote_addr;
830662f6
VP		 2417 sin6->sin6_family = PF_INET6;
2418 sin6->sin6_port = peer_port;
2419 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
2420 }
5b6b8fe6
SW		 2421 memcpy(&child_ep->com.remote_addr, &child_ep->com.mapped_remote_addr,
2422 sizeof(child_ep->com.remote_addr));
940fd304 2423 get_remote_addr(parent_ep, child_ep);
5b6b8fe6 2424
cfdda9d7
SW		 2425 c4iw_get_ep(&parent_ep->com);
2426 child_ep->parent_ep = parent_ep;
6c53e938 2427 child_ep->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
cfdda9d7
SW		 2428 child_ep->dst = dst;
2429 child_ep->hwtid = hwtid;
cfdda9d7
SW		 2430
2431 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
3786cf18 2432 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
cfdda9d7
SW		 2433
2434 init_timer(&child_ep->timer);
2435 cxgb4_insert_tid(t, child_ep, hwtid);
b3de6cfe 2436 insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
830662f6 2437 accept_cr(child_ep, skb, req);
793dad94 2438 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
cfdda9d7
SW		 2439 goto out;
2440reject:
830662f6 2441 reject_cr(dev, hwtid, skb);
cfdda9d7
SW		 2442out:
2443 return 0;
2444}
2445
2446static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
2447{
2448 struct c4iw_ep *ep;
2449 struct cpl_pass_establish *req = cplhdr(skb);
2450 struct tid_info *t = dev->rdev.lldi.tids;
2451 unsigned int tid = GET_TID(req);
2452
2453 ep = lookup_tid(t, tid);
2454 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2455 ep->snd_seq = be32_to_cpu(req->snd_isn);
2456 ep->rcv_seq = be32_to_cpu(req->rcv_isn);
2457
1cab775c
VP		 2458 PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
2459 ntohs(req->tcp_opt));
2460
cfdda9d7
SW		 2461 set_emss(ep, ntohs(req->tcp_opt));
2462
2463 dst_confirm(ep->dst);
2464 state_set(&ep->com, MPA_REQ_WAIT);
2465 start_ep_timer(ep);
2466 send_flowc(ep, skb);
793dad94 2467 set_bit(PASS_ESTAB, &ep->com.history);
cfdda9d7
SW		 2468
2469 return 0;
2470}
2471
2472static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
2473{
2474 struct cpl_peer_close *hdr = cplhdr(skb);
2475 struct c4iw_ep *ep;
2476 struct c4iw_qp_attributes attrs;
cfdda9d7
SW		 2477 int disconnect = 1;
2478 int release = 0;
cfdda9d7
SW		 2479 struct tid_info *t = dev->rdev.lldi.tids;
2480 unsigned int tid = GET_TID(hdr);
8da7e7a5 2481 int ret;
cfdda9d7
SW		 2482
2483 ep = lookup_tid(t, tid);
2484 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2485 dst_confirm(ep->dst);
2486
793dad94 2487 set_bit(PEER_CLOSE, &ep->com.history);
2f5b48c3 2488 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2489 switch (ep->com.state) {
2490 case MPA_REQ_WAIT:
2491 __state_set(&ep->com, CLOSING);
2492 break;
2493 case MPA_REQ_SENT:
2494 __state_set(&ep->com, CLOSING);
2495 connect_reply_upcall(ep, -ECONNRESET);
2496 break;
2497 case MPA_REQ_RCVD:
2498
2499 /*
2500 * We're gonna mark this puppy DEAD, but keep
2501 * the reference on it until the ULP accepts or
2502 * rejects the CR. Also wake up anyone waiting
2503 * in rdma connection migration (see c4iw_accept_cr()).
2504 */
2505 __state_set(&ep->com, CLOSING);
cfdda9d7 2506 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
d9594d99 2507 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 2508 break;
2509 case MPA_REP_SENT:
2510 __state_set(&ep->com, CLOSING);
cfdda9d7 2511 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
d9594d99 2512 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
cfdda9d7
SW		 2513 break;
2514 case FPDU_MODE:
ca5a2202 2515 start_ep_timer(ep);
cfdda9d7 2516 __state_set(&ep->com, CLOSING);
30c95c2d 2517 attrs.next_state = C4IW_QP_STATE_CLOSING;
8da7e7a5 2518 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
30c95c2d 2519 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
8da7e7a5
SW		 2520 if (ret != -ECONNRESET) {
2521 peer_close_upcall(ep);
2522 disconnect = 1;
2523 }
cfdda9d7
SW		 2524 break;
2525 case ABORTING:
2526 disconnect = 0;
2527 break;
2528 case CLOSING:
2529 __state_set(&ep->com, MORIBUND);
2530 disconnect = 0;
2531 break;
2532 case MORIBUND:
b33bd0cb 2533 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2534 if (ep->com.cm_id && ep->com.qp) {
2535 attrs.next_state = C4IW_QP_STATE_IDLE;
2536 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2537 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2538 }
be13b2df 2539 close_complete_upcall(ep, 0);
cfdda9d7
SW		 2540 __state_set(&ep->com, DEAD);
2541 release = 1;
2542 disconnect = 0;
2543 break;
2544 case DEAD:
2545 disconnect = 0;
2546 break;
2547 default:
2548 BUG_ON(1);
2549 }
2f5b48c3 2550 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2551 if (disconnect)
2552 c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
2553 if (release)
2554 release_ep_resources(ep);
2555 return 0;
2556}
2557
cfdda9d7
SW		 2558static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
2559{
2560 struct cpl_abort_req_rss *req = cplhdr(skb);
2561 struct c4iw_ep *ep;
2562 struct cpl_abort_rpl *rpl;
2563 struct sk_buff *rpl_skb;
2564 struct c4iw_qp_attributes attrs;
2565 int ret;
2566 int release = 0;
cfdda9d7
SW		 2567 struct tid_info *t = dev->rdev.lldi.tids;
2568 unsigned int tid = GET_TID(req);
cfdda9d7
SW		 2569
2570 ep = lookup_tid(t, tid);
7a2cea2a 2571 if (is_neg_adv(req->status)) {
179d03bb
H		 2572 PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
2573 __func__, ep->hwtid, req->status,
2574 neg_adv_str(req->status));
2575 ep->stats.abort_neg_adv++;
2576 mutex_lock(&dev->rdev.stats.lock);
2577 dev->rdev.stats.neg_adv++;
2578 mutex_unlock(&dev->rdev.stats.lock);
cfdda9d7
SW		 2579 return 0;
2580 }
cfdda9d7
SW		 2581 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
2582 ep->com.state);
793dad94 2583 set_bit(PEER_ABORT, &ep->com.history);
2f5b48c3
SW		 2584
2585 /*
2586 * Wake up any threads in rdma_init() or rdma_fini().
d2fe99e8
KS		 2587 * However, this is not needed if com state is just
2588 * MPA_REQ_SENT
2f5b48c3 2589 */
d2fe99e8
KS		 2590 if (ep->com.state != MPA_REQ_SENT)
2591 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
2f5b48c3
SW		 2592
2593 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2594 switch (ep->com.state) {
2595 case CONNECTING:
2596 break;
2597 case MPA_REQ_WAIT:
b33bd0cb 2598 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2599 break;
2600 case MPA_REQ_SENT:
b33bd0cb 2601 (void)stop_ep_timer(ep);
fe7e0a4d 2602 if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
d2fe99e8
KS		 2603 connect_reply_upcall(ep, -ECONNRESET);
2604 else {
2605 /*
2606 * we just don't send notification upwards because we
2607 * want to retry with mpa_v1 without upper layers even
2608 * knowing it.
2609 *
2610 * do some housekeeping so as to re-initiate the
2611 * connection
2612 */
2613 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
2614 mpa_rev);
2615 ep->retry_with_mpa_v1 = 1;
2616 }
cfdda9d7
SW		 2617 break;
2618 case MPA_REP_SENT:
cfdda9d7
SW		 2619 break;
2620 case MPA_REQ_RCVD:
cfdda9d7
SW		 2621 break;
2622 case MORIBUND:
2623 case CLOSING:
ca5a2202 2624 stop_ep_timer(ep);
cfdda9d7
SW		 2625 /*FALLTHROUGH*/
2626 case FPDU_MODE:
2627 if (ep->com.cm_id && ep->com.qp) {
2628 attrs.next_state = C4IW_QP_STATE_ERROR;
2629 ret = c4iw_modify_qp(ep->com.qp->rhp,
2630 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
2631 &attrs, 1);
2632 if (ret)
2633 printk(KERN_ERR MOD
2634 "%s - qp <- error failed!\n",
2635 __func__);
2636 }
2637 peer_abort_upcall(ep);
2638 break;
2639 case ABORTING:
2640 break;
2641 case DEAD:
2642 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
2f5b48c3 2643 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2644 return 0;
2645 default:
2646 BUG_ON(1);
2647 break;
2648 }
2649 dst_confirm(ep->dst);
2650 if (ep->com.state != ABORTING) {
2651 __state_set(&ep->com, DEAD);
d2fe99e8
KS		 2652 /* we don't release if we want to retry with mpa_v1 */
2653 if (!ep->retry_with_mpa_v1)
2654 release = 1;
cfdda9d7 2655 }
2f5b48c3 2656 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2657
2658 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
2659 if (!rpl_skb) {
2660 printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
2661 __func__);
2662 release = 1;
2663 goto out;
2664 }
2665 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
2666 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
2667 INIT_TP_WR(rpl, ep->hwtid);
2668 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
2669 rpl->cmd = CPL_ABORT_NO_RST;
2670 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
2671out:
cfdda9d7
SW		 2672 if (release)
2673 release_ep_resources(ep);
fe7e0a4d
VP		 2674 else if (ep->retry_with_mpa_v1) {
2675 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
d2fe99e8
KS		 2676 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
2677 dst_release(ep->dst);
2678 cxgb4_l2t_release(ep->l2t);
2679 c4iw_reconnect(ep);
2680 }
2681
cfdda9d7
SW		 2682 return 0;
2683}
2684
2685static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
2686{
2687 struct c4iw_ep *ep;
2688 struct c4iw_qp_attributes attrs;
2689 struct cpl_close_con_rpl *rpl = cplhdr(skb);
cfdda9d7
SW		 2690 int release = 0;
2691 struct tid_info *t = dev->rdev.lldi.tids;
2692 unsigned int tid = GET_TID(rpl);
cfdda9d7
SW		 2693
2694 ep = lookup_tid(t, tid);
2695
2696 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2697 BUG_ON(!ep);
2698
2699 /* The cm_id may be null if we failed to connect */
2f5b48c3 2700 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 2701 switch (ep->com.state) {
2702 case CLOSING:
2703 __state_set(&ep->com, MORIBUND);
2704 break;
2705 case MORIBUND:
b33bd0cb 2706 (void)stop_ep_timer(ep);
cfdda9d7
SW		 2707 if ((ep->com.cm_id) && (ep->com.qp)) {
2708 attrs.next_state = C4IW_QP_STATE_IDLE;
2709 c4iw_modify_qp(ep->com.qp->rhp,
2710 ep->com.qp,
2711 C4IW_QP_ATTR_NEXT_STATE,
2712 &attrs, 1);
2713 }
be13b2df 2714 close_complete_upcall(ep, 0);
cfdda9d7
SW		 2715 __state_set(&ep->com, DEAD);
2716 release = 1;
2717 break;
2718 case ABORTING:
2719 case DEAD:
2720 break;
2721 default:
2722 BUG_ON(1);
2723 break;
2724 }
2f5b48c3 2725 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2726 if (release)
2727 release_ep_resources(ep);
2728 return 0;
2729}
2730
2731static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
2732{
0e42c1f4 2733 struct cpl_rdma_terminate *rpl = cplhdr(skb);
cfdda9d7 2734 struct tid_info *t = dev->rdev.lldi.tids;
0e42c1f4
SW		 2735 unsigned int tid = GET_TID(rpl);
2736 struct c4iw_ep *ep;
2737 struct c4iw_qp_attributes attrs;
cfdda9d7
SW		 2738
2739 ep = lookup_tid(t, tid);
0e42c1f4 2740 BUG_ON(!ep);
cfdda9d7 2741
30c95c2d 2742 if (ep && ep->com.qp) {
0e42c1f4
SW		 2743 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
2744 ep->com.qp->wq.sq.qid);
2745 attrs.next_state = C4IW_QP_STATE_TERMINATE;
2746 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
2747 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
2748 } else
30c95c2d 2749 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
cfdda9d7 2750
cfdda9d7
SW		 2751 return 0;
2752}
2753
2754/*
2755 * Upcall from the adapter indicating data has been transmitted.
2756 * For us its just the single MPA request or reply. We can now free
2757 * the skb holding the mpa message.
2758 */
2759static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
2760{
2761 struct c4iw_ep *ep;
2762 struct cpl_fw4_ack *hdr = cplhdr(skb);
2763 u8 credits = hdr->credits;
2764 unsigned int tid = GET_TID(hdr);
2765 struct tid_info *t = dev->rdev.lldi.tids;
2766
2767
2768 ep = lookup_tid(t, tid);
2769 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
2770 if (credits == 0) {
aa1ad260
JP		 2771 PDBG("%s 0 credit ack ep %p tid %u state %u\n",
2772 __func__, ep, ep->hwtid, state_read(&ep->com));
cfdda9d7
SW		 2773 return 0;
2774 }
2775
2776 dst_confirm(ep->dst);
2777 if (ep->mpa_skb) {
2778 PDBG("%s last streaming msg ack ep %p tid %u state %u "
2779 "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
2780 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
2781 kfree_skb(ep->mpa_skb);
2782 ep->mpa_skb = NULL;
2783 }
2784 return 0;
2785}
2786
cfdda9d7
SW		 2787int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2788{
a7db89eb
SW		 2789 int err = 0;
2790 int disconnect = 0;
cfdda9d7
SW		 2791 struct c4iw_ep *ep = to_ep(cm_id);
2792 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
2793
a7db89eb
SW		 2794 mutex_lock(&ep->com.mutex);
2795 if (ep->com.state == DEAD) {
2796 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2797 c4iw_put_ep(&ep->com);
2798 return -ECONNRESET;
2799 }
793dad94 2800 set_bit(ULP_REJECT, &ep->com.history);
a7db89eb 2801 BUG_ON(ep->com.state != MPA_REQ_RCVD);
cfdda9d7
SW		 2802 if (mpa_rev == 0)
2803 abort_connection(ep, NULL, GFP_KERNEL);
2804 else {
2805 err = send_mpa_reject(ep, pdata, pdata_len);
a7db89eb 2806 disconnect = 1;
cfdda9d7 2807 }
a7db89eb
SW		 2808 mutex_unlock(&ep->com.mutex);
2809 if (disconnect)
2810 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
cfdda9d7
SW		 2811 c4iw_put_ep(&ep->com);
2812 return 0;
2813}
2814
2815int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2816{
2817 int err;
2818 struct c4iw_qp_attributes attrs;
2819 enum c4iw_qp_attr_mask mask;
2820 struct c4iw_ep *ep = to_ep(cm_id);
2821 struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
2822 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
2823
2824 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
a7db89eb
SW		 2825
2826 mutex_lock(&ep->com.mutex);
2827 if (ep->com.state == DEAD) {
cfdda9d7
SW		 2828 err = -ECONNRESET;
2829 goto err;
2830 }
2831
a7db89eb 2832 BUG_ON(ep->com.state != MPA_REQ_RCVD);
cfdda9d7
SW		 2833 BUG_ON(!qp);
2834
793dad94 2835 set_bit(ULP_ACCEPT, &ep->com.history);
4c2c5763
HS		 2836 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
2837 (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
cfdda9d7
SW		 2838 abort_connection(ep, NULL, GFP_KERNEL);
2839 err = -EINVAL;
2840 goto err;
2841 }
2842
d2fe99e8
KS		 2843 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
2844 if (conn_param->ord > ep->ird) {
4c2c5763
HS		 2845 if (RELAXED_IRD_NEGOTIATION) {
2846 ep->ord = ep->ird;
2847 } else {
2848 ep->ird = conn_param->ird;
2849 ep->ord = conn_param->ord;
2850 send_mpa_reject(ep, conn_param->private_data,
2851 conn_param->private_data_len);
2852 abort_connection(ep, NULL, GFP_KERNEL);
2853 err = -ENOMEM;
2854 goto err;
2855 }
d2fe99e8 2856 }
4c2c5763
HS		 2857 if (conn_param->ird < ep->ord) {
2858 if (RELAXED_IRD_NEGOTIATION &&
2859 ep->ord <= h->rdev.lldi.max_ordird_qp) {
2860 conn_param->ird = ep->ord;
2861 } else {
d2fe99e8
KS		 2862 abort_connection(ep, NULL, GFP_KERNEL);
2863 err = -ENOMEM;
2864 goto err;
2865 }
2866 }
d2fe99e8 2867 }
cfdda9d7
SW		 2868 ep->ird = conn_param->ird;
2869 ep->ord = conn_param->ord;
2870
4c2c5763 2871 if (ep->mpa_attr.version == 1) {
d2fe99e8
KS		 2872 if (peer2peer && ep->ird == 0)
2873 ep->ird = 1;
4c2c5763
HS		 2874 } else {
2875 if (peer2peer &&
2876 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
2877 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ord == 0)
2878 ep->ird = 1;
2879 }
cfdda9d7
SW		 2880
2881 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
2882
d2fe99e8
KS		 2883 cm_id->add_ref(cm_id);
2884 ep->com.cm_id = cm_id;
2885 ep->com.qp = qp;
325abead 2886 ref_qp(ep);
d2fe99e8 2887
cfdda9d7
SW		 2888 /* bind QP to EP and move to RTS */
2889 attrs.mpa_attr = ep->mpa_attr;
2890 attrs.max_ird = ep->ird;
2891 attrs.max_ord = ep->ord;
2892 attrs.llp_stream_handle = ep;
2893 attrs.next_state = C4IW_QP_STATE_RTS;
2894
2895 /* bind QP and TID with INIT_WR */
2896 mask = C4IW_QP_ATTR_NEXT_STATE |
2897 C4IW_QP_ATTR_LLP_STREAM_HANDLE |
2898 C4IW_QP_ATTR_MPA_ATTR |
2899 C4IW_QP_ATTR_MAX_IRD |
2900 C4IW_QP_ATTR_MAX_ORD;
2901
2902 err = c4iw_modify_qp(ep->com.qp->rhp,
2903 ep->com.qp, mask, &attrs, 1);
2904 if (err)
2905 goto err1;
2906 err = send_mpa_reply(ep, conn_param->private_data,
2907 conn_param->private_data_len);
2908 if (err)
2909 goto err1;
2910
a7db89eb 2911 __state_set(&ep->com, FPDU_MODE);
cfdda9d7 2912 established_upcall(ep);
a7db89eb 2913 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2914 c4iw_put_ep(&ep->com);
2915 return 0;
2916err1:
2917 ep->com.cm_id = NULL;
4c2c5763 2918 abort_connection(ep, NULL, GFP_KERNEL);
cfdda9d7
SW		 2919 cm_id->rem_ref(cm_id);
2920err:
a7db89eb 2921 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 2922 c4iw_put_ep(&ep->com);
2923 return err;
2924}
2925
830662f6
VP		 2926static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2927{
2928 struct in_device *ind;
2929 int found = 0;
2930 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
2931 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
2932
2933 ind = in_dev_get(dev->rdev.lldi.ports[0]);
2934 if (!ind)
2935 return -EADDRNOTAVAIL;
2936 for_primary_ifa(ind) {
2937 laddr->sin_addr.s_addr = ifa->ifa_address;
2938 raddr->sin_addr.s_addr = ifa->ifa_address;
2939 found = 1;
2940 break;
2941 }
2942 endfor_ifa(ind);
2943 in_dev_put(ind);
2944 return found ? 0 : -EADDRNOTAVAIL;
2945}
2946
2947static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
2948 unsigned char banned_flags)
2949{
2950 struct inet6_dev *idev;
2951 int err = -EADDRNOTAVAIL;
2952
2953 rcu_read_lock();
2954 idev = __in6_dev_get(dev);
2955 if (idev != NULL) {
2956 struct inet6_ifaddr *ifp;
2957
2958 read_lock_bh(&idev->lock);
2959 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2960 if (ifp->scope == IFA_LINK &&
2961 !(ifp->flags & banned_flags)) {
2962 memcpy(addr, &ifp->addr, 16);
2963 err = 0;
2964 break;
2965 }
2966 }
2967 read_unlock_bh(&idev->lock);
2968 }
2969 rcu_read_unlock();
2970 return err;
2971}
2972
2973static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
2974{
2975 struct in6_addr uninitialized_var(addr);
2976 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->local_addr;
2977 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->remote_addr;
2978
2979 if (get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
2980 memcpy(la6->sin6_addr.s6_addr, &addr, 16);
2981 memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
2982 return 0;
2983 }
2984 return -EADDRNOTAVAIL;
2985}
2986
cfdda9d7
SW		 2987int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2988{
cfdda9d7
SW		 2989 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
2990 struct c4iw_ep *ep;
3786cf18 2991 int err = 0;
9eccfe10
SW		 2992 struct sockaddr_in *laddr;
2993 struct sockaddr_in *raddr;
2994 struct sockaddr_in6 *laddr6;
2995 struct sockaddr_in6 *raddr6;
2996 struct iwpm_dev_data pm_reg_msg;
2997 struct iwpm_sa_data pm_msg;
830662f6
VP		 2998 __u8 *ra;
2999 int iptype;
9eccfe10 3000 int iwpm_err = 0;
cfdda9d7 3001
4c2c5763
HS		 3002 if ((conn_param->ord > cur_max_read_depth(dev)) ||
3003 (conn_param->ird > cur_max_read_depth(dev))) {
be4c9bad
RD		 3004 err = -EINVAL;
3005 goto out;
3006 }
cfdda9d7
SW		 3007 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3008 if (!ep) {
3009 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
3010 err = -ENOMEM;
3011 goto out;
3012 }
3013 init_timer(&ep->timer);
3014 ep->plen = conn_param->private_data_len;
3015 if (ep->plen)
3016 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
3017 conn_param->private_data, ep->plen);
3018 ep->ird = conn_param->ird;
3019 ep->ord = conn_param->ord;
3020
3021 if (peer2peer && ep->ord == 0)
3022 ep->ord = 1;
3023
3024 cm_id->add_ref(cm_id);
3025 ep->com.dev = dev;
3026 ep->com.cm_id = cm_id;
3027 ep->com.qp = get_qhp(dev, conn_param->qpn);
830662f6
VP		 3028 if (!ep->com.qp) {
3029 PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
3030 err = -EINVAL;
9eccfe10 3031 goto fail1;
830662f6 3032 }
325abead 3033 ref_qp(ep);
cfdda9d7
SW		 3034 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
3035 ep->com.qp, cm_id);
3036
3037 /*
3038 * Allocate an active TID to initiate a TCP connection.
3039 */
3040 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
3041 if (ep->atid == -1) {
3042 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
3043 err = -ENOMEM;
9eccfe10 3044 goto fail1;
cfdda9d7 3045 }
793dad94 3046 insert_handle(dev, &dev->atid_idr, ep, ep->atid);
cfdda9d7 3047
9eccfe10
SW		 3048 memcpy(&ep->com.local_addr, &cm_id->local_addr,
3049 sizeof(ep->com.local_addr));
3050 memcpy(&ep->com.remote_addr, &cm_id->remote_addr,
3051 sizeof(ep->com.remote_addr));
3052
3053 /* No port mapper available, go with the specified peer information */
3054 memcpy(&ep->com.mapped_local_addr, &cm_id->local_addr,
3055 sizeof(ep->com.mapped_local_addr));
3056 memcpy(&ep->com.mapped_remote_addr, &cm_id->remote_addr,
3057 sizeof(ep->com.mapped_remote_addr));
3058
3059 c4iw_form_reg_msg(dev, &pm_reg_msg);
3060 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_C4IW);
3061 if (iwpm_err) {
3062 PDBG("%s: Port Mapper reg pid fail (err = %d).\n",
3063 __func__, iwpm_err);
3064 }
3065 if (iwpm_valid_pid() && !iwpm_err) {
3066 c4iw_form_pm_msg(ep, &pm_msg);
3067 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_C4IW);
3068 if (iwpm_err)
3069 PDBG("%s: Port Mapper query fail (err = %d).\n",
3070 __func__, iwpm_err);
3071 else
3072 c4iw_record_pm_msg(ep, &pm_msg);
3073 }
3074 if (iwpm_create_mapinfo(&ep->com.local_addr,
3075 &ep->com.mapped_local_addr, RDMA_NL_C4IW)) {
3076 iwpm_remove_mapping(&ep->com.local_addr, RDMA_NL_C4IW);
3077 err = -ENOMEM;
3078 goto fail1;
3079 }
3080 print_addr(&ep->com, __func__, "add_query/create_mapinfo");
3081 set_bit(RELEASE_MAPINFO, &ep->com.flags);
3082
3083 laddr = (struct sockaddr_in *)&ep->com.mapped_local_addr;
3084 raddr = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
3085 laddr6 = (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
3086 raddr6 = (struct sockaddr_in6 *) &ep->com.mapped_remote_addr;
3087
830662f6
VP		 3088 if (cm_id->remote_addr.ss_family == AF_INET) {
3089 iptype = 4;
3090 ra = (__u8 *)&raddr->sin_addr;
cfdda9d7 3091
830662f6
VP		 3092 /*
3093 * Handle loopback requests to INADDR_ANY.
3094 */
3095 if ((__force int)raddr->sin_addr.s_addr == INADDR_ANY) {
3096 err = pick_local_ipaddrs(dev, cm_id);
3097 if (err)
9eccfe10 3098 goto fail1;
830662f6
VP		 3099 }
3100
3101 /* find a route */
3102 PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
3103 __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
3104 ra, ntohs(raddr->sin_port));
3105 ep->dst = find_route(dev, laddr->sin_addr.s_addr,
3106 raddr->sin_addr.s_addr, laddr->sin_port,
3107 raddr->sin_port, 0);
3108 } else {
3109 iptype = 6;
3110 ra = (__u8 *)&raddr6->sin6_addr;
3111
3112 /*
3113 * Handle loopback requests to INADDR_ANY.
3114 */
3115 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
3116 err = pick_local_ip6addrs(dev, cm_id);
3117 if (err)
9eccfe10 3118 goto fail1;
830662f6
VP		 3119 }
3120
3121 /* find a route */
3122 PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
3123 __func__, laddr6->sin6_addr.s6_addr,
3124 ntohs(laddr6->sin6_port),
3125 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
3126 ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
3127 raddr6->sin6_addr.s6_addr,
3128 laddr6->sin6_port, raddr6->sin6_port, 0,
3129 raddr6->sin6_scope_id);
3130 }
3131 if (!ep->dst) {
cfdda9d7
SW		 3132 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
3133 err = -EHOSTUNREACH;
9eccfe10 3134 goto fail2;
cfdda9d7 3135 }
cfdda9d7 3136
830662f6 3137 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true);
3786cf18 3138 if (err) {
cfdda9d7 3139 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
9eccfe10 3140 goto fail3;
cfdda9d7
SW		 3141 }
3142
3143 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
3144 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
3145 ep->l2t->idx);
3146
3147 state_set(&ep->com, CONNECTING);
3148 ep->tos = 0;
cfdda9d7
SW		 3149
3150 /* send connect request to rnic */
3151 err = send_connect(ep);
3152 if (!err)
3153 goto out;
3154
3155 cxgb4_l2t_release(ep->l2t);
cfdda9d7 3156fail3:
9eccfe10
SW		 3157 dst_release(ep->dst);
3158fail2:
793dad94 3159 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
cfdda9d7 3160 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
9eccfe10 3161fail1:
cfdda9d7
SW		 3162 cm_id->rem_ref(cm_id);
3163 c4iw_put_ep(&ep->com);
3164out:
3165 return err;
3166}
3167
830662f6
VP		 3168static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3169{
3170 int err;
9eccfe10
SW		 3171 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
3172 &ep->com.mapped_local_addr;
830662f6
VP		 3173
3174 c4iw_init_wr_wait(&ep->com.wr_wait);
3175 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
3176 ep->stid, &sin6->sin6_addr,
3177 sin6->sin6_port,
3178 ep->com.dev->rdev.lldi.rxq_ids[0]);
3179 if (!err)
3180 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3181 &ep->com.wr_wait,
3182 0, 0, __func__);
e6b11163
H		 3183 else if (err > 0)
3184 err = net_xmit_errno(err);
830662f6
VP		 3185 if (err)
3186 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
3187 err, ep->stid,
3188 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
3189 return err;
3190}
3191
3192static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
3193{
3194 int err;
9eccfe10
SW		 3195 struct sockaddr_in *sin = (struct sockaddr_in *)
3196 &ep->com.mapped_local_addr;
830662f6
VP		 3197
3198 if (dev->rdev.lldi.enable_fw_ofld_conn) {
3199 do {
3200 err = cxgb4_create_server_filter(
3201 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3202 sin->sin_addr.s_addr, sin->sin_port, 0,
3203 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
3204 if (err == -EBUSY) {
3205 set_current_state(TASK_UNINTERRUPTIBLE);
3206 schedule_timeout(usecs_to_jiffies(100));
3207 }
3208 } while (err == -EBUSY);
3209 } else {
3210 c4iw_init_wr_wait(&ep->com.wr_wait);
3211 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
3212 ep->stid, sin->sin_addr.s_addr, sin->sin_port,
3213 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
3214 if (!err)
3215 err = c4iw_wait_for_reply(&ep->com.dev->rdev,
3216 &ep->com.wr_wait,
3217 0, 0, __func__);
e6b11163
H		 3218 else if (err > 0)
3219 err = net_xmit_errno(err);
830662f6
VP		 3220 }
3221 if (err)
3222 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
3223 , err, ep->stid,
3224 &sin->sin_addr, ntohs(sin->sin_port));
3225 return err;
3226}
3227
cfdda9d7
SW		 3228int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
3229{
3230 int err = 0;
3231 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
3232 struct c4iw_listen_ep *ep;
9eccfe10
SW		 3233 struct iwpm_dev_data pm_reg_msg;
3234 struct iwpm_sa_data pm_msg;
3235 int iwpm_err = 0;
cfdda9d7 3236
cfdda9d7
SW		 3237 might_sleep();
3238
3239 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
3240 if (!ep) {
3241 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
3242 err = -ENOMEM;
3243 goto fail1;
3244 }
3245 PDBG("%s ep %p\n", __func__, ep);
3246 cm_id->add_ref(cm_id);
3247 ep->com.cm_id = cm_id;
3248 ep->com.dev = dev;
3249 ep->backlog = backlog;
24d44a39
SW		 3250 memcpy(&ep->com.local_addr, &cm_id->local_addr,
3251 sizeof(ep->com.local_addr));
cfdda9d7
SW		 3252
3253 /*
3254 * Allocate a server TID.
3255 */
8c044690
KS		 3256 if (dev->rdev.lldi.enable_fw_ofld_conn &&
3257 ep->com.local_addr.ss_family == AF_INET)
830662f6
VP		 3258 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
3259 cm_id->local_addr.ss_family, ep);
1cab775c 3260 else
830662f6
VP		 3261 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
3262 cm_id->local_addr.ss_family, ep);
1cab775c 3263
cfdda9d7 3264 if (ep->stid == -1) {
be4c9bad 3265 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
cfdda9d7
SW		 3266 err = -ENOMEM;
3267 goto fail2;
3268 }
793dad94 3269 insert_handle(dev, &dev->stid_idr, ep, ep->stid);
9eccfe10
SW		 3270
3271 /* No port mapper available, go with the specified info */
3272 memcpy(&ep->com.mapped_local_addr, &cm_id->local_addr,
3273 sizeof(ep->com.mapped_local_addr));
3274
3275 c4iw_form_reg_msg(dev, &pm_reg_msg);
3276 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_C4IW);
3277 if (iwpm_err) {
3278 PDBG("%s: Port Mapper reg pid fail (err = %d).\n",
3279 __func__, iwpm_err);
3280 }
3281 if (iwpm_valid_pid() && !iwpm_err) {
3282 memcpy(&pm_msg.loc_addr, &ep->com.local_addr,
3283 sizeof(ep->com.local_addr));
3284 iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_C4IW);
3285 if (iwpm_err)
3286 PDBG("%s: Port Mapper query fail (err = %d).\n",
3287 __func__, iwpm_err);
3288 else
3289 memcpy(&ep->com.mapped_local_addr,
3290 &pm_msg.mapped_loc_addr,
3291 sizeof(ep->com.mapped_local_addr));
3292 }
3293 if (iwpm_create_mapinfo(&ep->com.local_addr,
3294 &ep->com.mapped_local_addr, RDMA_NL_C4IW)) {
3295 err = -ENOMEM;
3296 goto fail3;
3297 }
3298 print_addr(&ep->com, __func__, "add_mapping/create_mapinfo");
3299
3300 set_bit(RELEASE_MAPINFO, &ep->com.flags);
cfdda9d7 3301 state_set(&ep->com, LISTEN);
830662f6
VP		 3302 if (ep->com.local_addr.ss_family == AF_INET)
3303 err = create_server4(dev, ep);
3304 else
3305 err = create_server6(dev, ep);
cfdda9d7
SW		 3306 if (!err) {
3307 cm_id->provider_data = ep;
3308 goto out;
3309 }
9eccfe10
SW		 3310
3311fail3:
830662f6
VP		 3312 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3313 ep->com.local_addr.ss_family);
cfdda9d7
SW		 3314fail2:
3315 cm_id->rem_ref(cm_id);
3316 c4iw_put_ep(&ep->com);
3317fail1:
3318out:
3319 return err;
3320}
3321
3322int c4iw_destroy_listen(struct iw_cm_id *cm_id)
3323{
3324 int err;
3325 struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
3326
3327 PDBG("%s ep %p\n", __func__, ep);
3328
3329 might_sleep();
3330 state_set(&ep->com, DEAD);
830662f6
VP		 3331 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
3332 ep->com.local_addr.ss_family == AF_INET) {
1cab775c
VP		 3333 err = cxgb4_remove_server_filter(
3334 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3335 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
3336 } else {
3337 c4iw_init_wr_wait(&ep->com.wr_wait);
830662f6
VP		 3338 err = cxgb4_remove_server(
3339 ep->com.dev->rdev.lldi.ports[0], ep->stid,
3340 ep->com.dev->rdev.lldi.rxq_ids[0], 0);
1cab775c
VP		 3341 if (err)
3342 goto done;
3343 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
3344 0, 0, __func__);
3345 }
793dad94 3346 remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
830662f6
VP		 3347 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
3348 ep->com.local_addr.ss_family);
cfdda9d7 3349done:
cfdda9d7
SW		 3350 cm_id->rem_ref(cm_id);
3351 c4iw_put_ep(&ep->com);
3352 return err;
3353}
3354
3355int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
3356{
3357 int ret = 0;
cfdda9d7
SW		 3358 int close = 0;
3359 int fatal = 0;
3360 struct c4iw_rdev *rdev;
cfdda9d7 3361
2f5b48c3 3362 mutex_lock(&ep->com.mutex);
cfdda9d7
SW		 3363
3364 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
3365 states[ep->com.state], abrupt);
3366
3367 rdev = &ep->com.dev->rdev;
3368 if (c4iw_fatal_error(rdev)) {
3369 fatal = 1;
be13b2df 3370 close_complete_upcall(ep, -EIO);
cfdda9d7
SW		 3371 ep->com.state = DEAD;
3372 }
3373 switch (ep->com.state) {
3374 case MPA_REQ_WAIT:
3375 case MPA_REQ_SENT:
3376 case MPA_REQ_RCVD:
3377 case MPA_REP_SENT:
3378 case FPDU_MODE:
3379 close = 1;
3380 if (abrupt)
3381 ep->com.state = ABORTING;
3382 else {
3383 ep->com.state = CLOSING;
ca5a2202 3384 start_ep_timer(ep);
cfdda9d7
SW		 3385 }
3386 set_bit(CLOSE_SENT, &ep->com.flags);
3387 break;
3388 case CLOSING:
3389 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
3390 close = 1;
3391 if (abrupt) {
b33bd0cb 3392 (void)stop_ep_timer(ep);
cfdda9d7
SW		 3393 ep->com.state = ABORTING;
3394 } else
3395 ep->com.state = MORIBUND;
3396 }
3397 break;
3398 case MORIBUND:
3399 case ABORTING:
3400 case DEAD:
3401 PDBG("%s ignoring disconnect ep %p state %u\n",
3402 __func__, ep, ep->com.state);
3403 break;
3404 default:
3405 BUG();
3406 break;
3407 }
3408
cfdda9d7 3409 if (close) {
8da7e7a5 3410 if (abrupt) {
793dad94 3411 set_bit(EP_DISC_ABORT, &ep->com.history);
be13b2df 3412 close_complete_upcall(ep, -ECONNRESET);
8da7e7a5 3413 ret = send_abort(ep, NULL, gfp);
793dad94
VP		 3414 } else {
3415 set_bit(EP_DISC_CLOSE, &ep->com.history);
cfdda9d7 3416 ret = send_halfclose(ep, gfp);
793dad94 3417 }
cfdda9d7
SW		 3418 if (ret)
3419 fatal = 1;
3420 }
8da7e7a5 3421 mutex_unlock(&ep->com.mutex);
cfdda9d7
SW		 3422 if (fatal)
3423 release_ep_resources(ep);
3424 return ret;
3425}
3426
1cab775c
VP		 3427static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3428 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3429{
3430 struct c4iw_ep *ep;
793dad94 3431 int atid = be32_to_cpu(req->tid);
1cab775c 3432
ef5d6355
VP		 3433 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
3434 (__force u32) req->tid);
1cab775c
VP		 3435 if (!ep)
3436 return;
3437
3438 switch (req->retval) {
3439 case FW_ENOMEM:
793dad94
VP		 3440 set_bit(ACT_RETRY_NOMEM, &ep->com.history);
3441 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3442 send_fw_act_open_req(ep, atid);
3443 return;
3444 }
1cab775c 3445 case FW_EADDRINUSE:
793dad94
VP		 3446 set_bit(ACT_RETRY_INUSE, &ep->com.history);
3447 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
3448 send_fw_act_open_req(ep, atid);
3449 return;
3450 }
1cab775c
VP		 3451 break;
3452 default:
3453 pr_info("%s unexpected ofld conn wr retval %d\n",
3454 __func__, req->retval);
3455 break;
3456 }
793dad94
VP		 3457 pr_err("active ofld_connect_wr failure %d atid %d\n",
3458 req->retval, atid);
3459 mutex_lock(&dev->rdev.stats.lock);
3460 dev->rdev.stats.act_ofld_conn_fails++;
3461 mutex_unlock(&dev->rdev.stats.lock);
1cab775c 3462 connect_reply_upcall(ep, status2errno(req->retval));
793dad94
VP		 3463 state_set(&ep->com, DEAD);
3464 remove_handle(dev, &dev->atid_idr, atid);
3465 cxgb4_free_atid(dev->rdev.lldi.tids, atid);
3466 dst_release(ep->dst);
3467 cxgb4_l2t_release(ep->l2t);
3468 c4iw_put_ep(&ep->com);
1cab775c
VP		 3469}
3470
3471static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
3472 struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
3473{
3474 struct sk_buff *rpl_skb;
3475 struct cpl_pass_accept_req *cpl;
3476 int ret;
3477
710a3110 3478 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
1cab775c
VP		 3479 BUG_ON(!rpl_skb);
3480 if (req->retval) {
3481 PDBG("%s passive open failure %d\n", __func__, req->retval);
793dad94
VP		 3482 mutex_lock(&dev->rdev.stats.lock);
3483 dev->rdev.stats.pas_ofld_conn_fails++;
3484 mutex_unlock(&dev->rdev.stats.lock);
1cab775c
VP		 3485 kfree_skb(rpl_skb);
3486 } else {
3487 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
3488 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
ef5d6355
VP		 3489 (__force u32) htonl(
3490 (__force u32) req->tid)));
1cab775c
VP		 3491 ret = pass_accept_req(dev, rpl_skb);
3492 if (!ret)
3493 kfree_skb(rpl_skb);
3494 }
3495 return;
3496}
3497
3498static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
2f5b48c3
SW		 3499{
3500 struct cpl_fw6_msg *rpl = cplhdr(skb);
1cab775c
VP		 3501 struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
3502
3503 switch (rpl->type) {
3504 case FW6_TYPE_CQE:
3505 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
3506 break;
3507 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
3508 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
3509 switch (req->t_state) {
3510 case TCP_SYN_SENT:
3511 active_ofld_conn_reply(dev, skb, req);
3512 break;
3513 case TCP_SYN_RECV:
3514 passive_ofld_conn_reply(dev, skb, req);
3515 break;
3516 default:
3517 pr_err("%s unexpected ofld conn wr state %d\n",
3518 __func__, req->t_state);
3519 break;
3520 }
3521 break;
3522 }
3523 return 0;
3524}
3525
3526static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
3527{
3528 u32 l2info;
f079af7a 3529 u16 vlantag, len, hdr_len, eth_hdr_len;
1cab775c
VP		 3530 u8 intf;
3531 struct cpl_rx_pkt *cpl = cplhdr(skb);
3532 struct cpl_pass_accept_req *req;
3533 struct tcp_options_received tmp_opt;
f079af7a 3534 struct c4iw_dev *dev;
1cab775c 3535
f079af7a 3536 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
1cab775c 3537 /* Store values from cpl_rx_pkt in temporary location. */
ef5d6355
VP		 3538 vlantag = (__force u16) cpl->vlan;
3539 len = (__force u16) cpl->len;
3540 l2info = (__force u32) cpl->l2info;
3541 hdr_len = (__force u16) cpl->hdr_len;
1cab775c
VP		 3542 intf = cpl->iff;
3543
3544 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
3545
3546 /*
3547 * We need to parse the TCP options from SYN packet.
3548 * to generate cpl_pass_accept_req.
3549 */
3550 memset(&tmp_opt, 0, sizeof(tmp_opt));
3551 tcp_clear_options(&tmp_opt);
1a2c6181 3552 tcp_parse_options(skb, &tmp_opt, 0, NULL);
1cab775c
VP		 3553
3554 req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
3555 memset(req, 0, sizeof(*req));
cf7fe64a
HS		 3556 req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
3557 SYN_MAC_IDX_V(RX_MACIDX_G(
ef5d6355 3558 (__force int) htonl(l2info))) |
cf7fe64a 3559 SYN_XACT_MATCH_F);
f079af7a 3560 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
bdc590b9
HS		 3561 RX_ETHHDR_LEN_G((__force int)htonl(l2info)) :
3562 RX_T5_ETHHDR_LEN_G((__force int)htonl(l2info));
cf7fe64a 3563 req->hdr_len = cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(
ef5d6355 3564 (__force int) htonl(l2info))) |
cf7fe64a 3565 TCP_HDR_LEN_V(RX_TCPHDR_LEN_G(
ef5d6355 3566 (__force int) htons(hdr_len))) |
cf7fe64a 3567 IP_HDR_LEN_V(RX_IPHDR_LEN_G(
ef5d6355 3568 (__force int) htons(hdr_len))) |
cf7fe64a 3569 ETH_HDR_LEN_V(RX_ETHHDR_LEN_G(eth_hdr_len)));
ef5d6355
VP		 3570 req->vlan = (__force __be16) vlantag;
3571 req->len = (__force __be16) len;
6c53e938
HS		 3572 req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
3573 PASS_OPEN_TOS_V(tos));
1cab775c
VP		 3574 req->tcpopt.mss = htons(tmp_opt.mss_clamp);
3575 if (tmp_opt.wscale_ok)
3576 req->tcpopt.wsf = tmp_opt.snd_wscale;
3577 req->tcpopt.tstamp = tmp_opt.saw_tstamp;
3578 if (tmp_opt.sack_ok)
3579 req->tcpopt.sack = 1;
3580 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
3581 return;
3582}
3583
3584static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
3585 __be32 laddr, __be16 lport,
3586 __be32 raddr, __be16 rport,
3587 u32 rcv_isn, u32 filter, u16 window,
3588 u32 rss_qid, u8 port_id)
3589{
3590 struct sk_buff *req_skb;
3591 struct fw_ofld_connection_wr *req;
3592 struct cpl_pass_accept_req *cpl = cplhdr(skb);
1ce1d471 3593 int ret;
1cab775c
VP		 3594
3595 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
3596 req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
3597 memset(req, 0, sizeof(*req));
6c53e938 3598 req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
e2ac9628 3599 req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
77a80e23 3600 req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
ef5d6355 3601 req->le.filter = (__force __be32) filter;
1cab775c
VP		 3602 req->le.lport = lport;
3603 req->le.pport = rport;
3604 req->le.u.ipv4.lip = laddr;
3605 req->le.u.ipv4.pip = raddr;
3606 req->tcb.rcv_nxt = htonl(rcv_isn + 1);
3607 req->tcb.rcv_adv = htons(window);
3608 req->tcb.t_state_to_astid =
77a80e23
HS		 3609 htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
3610 FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
3611 FW_OFLD_CONNECTION_WR_ASTID_V(
6c53e938 3612 PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
1cab775c
VP		 3613
3614 /*
3615 * We store the qid in opt2 which will be used by the firmware
3616 * to send us the wr response.
3617 */
d7990b0c 3618 req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
1cab775c
VP		 3619
3620 /*
3621 * We initialize the MSS index in TCB to 0xF.
3622 * So that when driver sends cpl_pass_accept_rpl
3623 * TCB picks up the correct value. If this was 0
3624 * TP will ignore any value > 0 for MSS index.
3625 */
d7990b0c 3626 req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
6198dd8d 3627 req->cookie = (uintptr_t)skb;
1cab775c
VP		 3628
3629 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
1ce1d471
SW		 3630 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
3631 if (ret < 0) {
3632 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
3633 ret);
3634 kfree_skb(skb);
3635 kfree_skb(req_skb);
3636 }
1cab775c
VP		 3637}
3638
3639/*
3640 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
3641 * messages when a filter is being used instead of server to
3642 * redirect a syn packet. When packets hit filter they are redirected
3643 * to the offload queue and driver tries to establish the connection
3644 * using firmware work request.
3645 */
3646static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
3647{
3648 int stid;
3649 unsigned int filter;
3650 struct ethhdr *eh = NULL;
3651 struct vlan_ethhdr *vlan_eh = NULL;
3652 struct iphdr *iph;
3653 struct tcphdr *tcph;
3654 struct rss_header *rss = (void *)skb->data;
3655 struct cpl_rx_pkt *cpl = (void *)skb->data;
3656 struct cpl_pass_accept_req *req = (void *)(rss + 1);
3657 struct l2t_entry *e;
3658 struct dst_entry *dst;
1cab775c
VP		 3659 struct c4iw_ep *lep;
3660 u16 window;
3661 struct port_info *pi;
3662 struct net_device *pdev;
f079af7a 3663 u16 rss_qid, eth_hdr_len;
1cab775c
VP		 3664 int step;
3665 u32 tx_chan;
3666 struct neighbour *neigh;
3667
3668 /* Drop all non-SYN packets */
bdc590b9 3669 if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
1cab775c
VP		 3670 goto reject;
3671
3672 /*
3673 * Drop all packets which did not hit the filter.
3674 * Unlikely to happen.
3675 */
3676 if (!(rss->filter_hit && rss->filter_tid))
3677 goto reject;
3678
3679 /*
3680 * Calculate the server tid from filter hit index from cpl_rx_pkt.
3681 */
a4ea025f 3682 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
1cab775c
VP		 3683
3684 lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid);
3685 if (!lep) {
3686 PDBG("%s connect request on invalid stid %d\n", __func__, stid);
3687 goto reject;
3688 }
3689
f079af7a 3690 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
bdc590b9
HS		 3691 RX_ETHHDR_LEN_G(htonl(cpl->l2info)) :
3692 RX_T5_ETHHDR_LEN_G(htonl(cpl->l2info));
f079af7a 3693 if (eth_hdr_len == ETH_HLEN) {
1cab775c
VP		 3694 eh = (struct ethhdr *)(req + 1);
3695 iph = (struct iphdr *)(eh + 1);
3696 } else {
3697 vlan_eh = (struct vlan_ethhdr *)(req + 1);
3698 iph = (struct iphdr *)(vlan_eh + 1);
3699 skb->vlan_tci = ntohs(cpl->vlan);
3700 }
3701
3702 if (iph->version != 0x4)
3703 goto reject;
3704
3705 tcph = (struct tcphdr *)(iph + 1);
3706 skb_set_network_header(skb, (void *)iph - (void *)rss);
3707 skb_set_transport_header(skb, (void *)tcph - (void *)rss);
3708 skb_get(skb);
3709
3710 PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
3711 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
3712 ntohs(tcph->source), iph->tos);
3713
830662f6
VP		 3714 dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
3715 iph->tos);
3716 if (!dst) {
1cab775c
VP		 3717 pr_err("%s - failed to find dst entry!\n",
3718 __func__);
3719 goto reject;
3720 }
1cab775c
VP		 3721 neigh = dst_neigh_lookup_skb(dst, skb);
3722
aaa0c23c
ZZ		 3723 if (!neigh) {
3724 pr_err("%s - failed to allocate neigh!\n",
3725 __func__);
3726 goto free_dst;
3727 }
3728
1cab775c
VP		 3729 if (neigh->dev->flags & IFF_LOOPBACK) {
3730 pdev = ip_dev_find(&init_net, iph->daddr);
3731 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
3732 pdev, 0);
3733 pi = (struct port_info *)netdev_priv(pdev);
3734 tx_chan = cxgb4_port_chan(pdev);
3735 dev_put(pdev);
3736 } else {
830662f6 3737 pdev = get_real_dev(neigh->dev);
1cab775c 3738 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
830662f6
VP		 3739 pdev, 0);
3740 pi = (struct port_info *)netdev_priv(pdev);
3741 tx_chan = cxgb4_port_chan(pdev);
1cab775c 3742 }
ebf00060 3743 neigh_release(neigh);
1cab775c
VP		 3744 if (!e) {
3745 pr_err("%s - failed to allocate l2t entry!\n",
3746 __func__);
3747 goto free_dst;
3748 }
3749
3750 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
3751 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
ef5d6355 3752 window = (__force u16) htons((__force u16)tcph->window);
1cab775c
VP		 3753
3754 /* Calcuate filter portion for LE region. */
41b4f86c
KS		 3755 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
3756 dev->rdev.lldi.ports[0],
3757 e));
1cab775c
VP		 3758
3759 /*
3760 * Synthesize the cpl_pass_accept_req. We have everything except the
3761 * TID. Once firmware sends a reply with TID we update the TID field
3762 * in cpl and pass it through the regular cpl_pass_accept_req path.
3763 */
3764 build_cpl_pass_accept_req(skb, stid, iph->tos);
3765 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
3766 tcph->source, ntohl(tcph->seq), filter, window,
3767 rss_qid, pi->port_id);
3768 cxgb4_l2t_release(e);
3769free_dst:
3770 dst_release(dst);
3771reject:
2f5b48c3
SW		 3772 return 0;
3773}
3774
be4c9bad
RD		 3775/*
3776 * These are the real handlers that are called from a
3777 * work queue.
3778 */
3779static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
3780 [CPL_ACT_ESTABLISH] = act_establish,
3781 [CPL_ACT_OPEN_RPL] = act_open_rpl,
3782 [CPL_RX_DATA] = rx_data,
3783 [CPL_ABORT_RPL_RSS] = abort_rpl,
3784 [CPL_ABORT_RPL] = abort_rpl,
3785 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
3786 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
3787 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
3788 [CPL_PASS_ESTABLISH] = pass_establish,
3789 [CPL_PEER_CLOSE] = peer_close,
3790 [CPL_ABORT_REQ_RSS] = peer_abort,
3791 [CPL_CLOSE_CON_RPL] = close_con_rpl,
3792 [CPL_RDMA_TERMINATE] = terminate,
2f5b48c3 3793 [CPL_FW4_ACK] = fw4_ack,
1cab775c
VP		 3794 [CPL_FW6_MSG] = deferred_fw6_msg,
3795 [CPL_RX_PKT] = rx_pkt
be4c9bad
RD		 3796};
3797
3798static void process_timeout(struct c4iw_ep *ep)
3799{
3800 struct c4iw_qp_attributes attrs;
3801 int abort = 1;
3802
2f5b48c3 3803 mutex_lock(&ep->com.mutex);
be4c9bad
RD		 3804 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
3805 ep->com.state);
793dad94 3806 set_bit(TIMEDOUT, &ep->com.history);
be4c9bad
RD		 3807 switch (ep->com.state) {
3808 case MPA_REQ_SENT:
3809 __state_set(&ep->com, ABORTING);
3810 connect_reply_upcall(ep, -ETIMEDOUT);
3811 break;
3812 case MPA_REQ_WAIT:
3813 __state_set(&ep->com, ABORTING);
3814 break;
3815 case CLOSING:
3816 case MORIBUND:
3817 if (ep->com.cm_id && ep->com.qp) {
3818 attrs.next_state = C4IW_QP_STATE_ERROR;
3819 c4iw_modify_qp(ep->com.qp->rhp,
3820 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
3821 &attrs, 1);
3822 }
3823 __state_set(&ep->com, ABORTING);
be13b2df 3824 close_complete_upcall(ep, -ETIMEDOUT);
be4c9bad 3825 break;
b33bd0cb
SW		 3826 case ABORTING:
3827 case DEAD:
3828
3829 /*
3830 * These states are expected if the ep timed out at the same
3831 * time as another thread was calling stop_ep_timer().
3832 * So we silently do nothing for these states.
3833 */
3834 abort = 0;
3835 break;
be4c9bad 3836 default:
76f267b7 3837 WARN(1, "%s unexpected state ep %p tid %u state %u\n",
be4c9bad 3838 __func__, ep, ep->hwtid, ep->com.state);
be4c9bad
RD		 3839 abort = 0;
3840 }
be4c9bad
RD		 3841 if (abort)
3842 abort_connection(ep, NULL, GFP_KERNEL);
cc18b939 3843 mutex_unlock(&ep->com.mutex);
be4c9bad
RD		 3844 c4iw_put_ep(&ep->com);
3845}
3846
3847static void process_timedout_eps(void)
3848{
3849 struct c4iw_ep *ep;
3850
3851 spin_lock_irq(&timeout_lock);
3852 while (!list_empty(&timeout_list)) {
3853 struct list_head *tmp;
3854
3855 tmp = timeout_list.next;
3856 list_del(tmp);
b33bd0cb
SW		 3857 tmp->next = NULL;
3858 tmp->prev = NULL;
be4c9bad
RD		 3859 spin_unlock_irq(&timeout_lock);
3860 ep = list_entry(tmp, struct c4iw_ep, entry);
3861 process_timeout(ep);
3862 spin_lock_irq(&timeout_lock);
3863 }
3864 spin_unlock_irq(&timeout_lock);
3865}
3866
3867static void process_work(struct work_struct *work)
3868{
3869 struct sk_buff *skb = NULL;
3870 struct c4iw_dev *dev;
c1d7356c 3871 struct cpl_act_establish *rpl;
be4c9bad
RD		 3872 unsigned int opcode;
3873 int ret;
3874
b33bd0cb 3875 process_timedout_eps();
be4c9bad
RD		 3876 while ((skb = skb_dequeue(&rxq))) {
3877 rpl = cplhdr(skb);
3878 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
3879 opcode = rpl->ot.opcode;
3880
3881 BUG_ON(!work_handlers[opcode]);
3882 ret = work_handlers[opcode](dev, skb);
3883 if (!ret)
3884 kfree_skb(skb);
b33bd0cb 3885 process_timedout_eps();
be4c9bad 3886 }
be4c9bad
RD		 3887}
3888
3889static DECLARE_WORK(skb_work, process_work);
3890
3891static void ep_timeout(unsigned long arg)
3892{
3893 struct c4iw_ep *ep = (struct c4iw_ep *)arg;
1ec779cc 3894 int kickit = 0;
be4c9bad
RD		 3895
3896 spin_lock(&timeout_lock);
1ec779cc 3897 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
b33bd0cb
SW		 3898 /*
3899 * Only insert if it is not already on the list.
3900 */
3901 if (!ep->entry.next) {
3902 list_add_tail(&ep->entry, &timeout_list);
3903 kickit = 1;
3904 }
1ec779cc 3905 }
be4c9bad 3906 spin_unlock(&timeout_lock);
1ec779cc
VP		 3907 if (kickit)
3908 queue_work(workq, &skb_work);
be4c9bad
RD		 3909}
3910
cfdda9d7
SW		 3911/*
3912 * All the CM events are handled on a work queue to have a safe context.
3913 */
3914static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
3915{
3916
3917 /*
3918 * Save dev in the skb->cb area.
3919 */
3920 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
3921
3922 /*
3923 * Queue the skb and schedule the worker thread.
3924 */
3925 skb_queue_tail(&rxq, skb);
3926 queue_work(workq, &skb_work);
3927 return 0;
3928}
3929
3930static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
3931{
3932 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
3933
3934 if (rpl->status != CPL_ERR_NONE) {
3935 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
3936 "for tid %u\n", rpl->status, GET_TID(rpl));
3937 }
2f5b48c3 3938 kfree_skb(skb);
cfdda9d7
SW		 3939 return 0;
3940}
3941
be4c9bad
RD		 3942static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
3943{
3944 struct cpl_fw6_msg *rpl = cplhdr(skb);
3945 struct c4iw_wr_wait *wr_waitp;
3946 int ret;
3947
3948 PDBG("%s type %u\n", __func__, rpl->type);
3949
3950 switch (rpl->type) {
5be78ee9 3951 case FW6_TYPE_WR_RPL:
be4c9bad 3952 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
c8e081a1 3953 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
be4c9bad 3954 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
d9594d99
SW		 3955 if (wr_waitp)
3956 c4iw_wake_up(wr_waitp, ret ? -ret : 0);
2f5b48c3 3957 kfree_skb(skb);
be4c9bad 3958 break;
5be78ee9 3959 case FW6_TYPE_CQE:
5be78ee9 3960 case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
1cab775c 3961 sched(dev, skb);
5be78ee9 3962 break;
be4c9bad
RD		 3963 default:
3964 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
3965 rpl->type);
2f5b48c3 3966 kfree_skb(skb);
be4c9bad
RD		 3967 break;
3968 }
3969 return 0;
3970}
3971
8da7e7a5
SW		 3972static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
3973{
3974 struct cpl_abort_req_rss *req = cplhdr(skb);
3975 struct c4iw_ep *ep;
3976 struct tid_info *t = dev->rdev.lldi.tids;
3977 unsigned int tid = GET_TID(req);
3978
3979 ep = lookup_tid(t, tid);
14b92228
SW		 3980 if (!ep) {
3981 printk(KERN_WARNING MOD
3982 "Abort on non-existent endpoint, tid %d\n", tid);
3983 kfree_skb(skb);
3984 return 0;
3985 }
7a2cea2a 3986 if (is_neg_adv(req->status)) {
179d03bb
H		 3987 PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
3988 __func__, ep->hwtid, req->status,
3989 neg_adv_str(req->status));
3990 ep->stats.abort_neg_adv++;
3991 dev->rdev.stats.neg_adv++;
8da7e7a5
SW		 3992 kfree_skb(skb);
3993 return 0;
3994 }
3995 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
3996 ep->com.state);
3997
3998 /*
3999 * Wake up any threads in rdma_init() or rdma_fini().
7c0a33d6
VP		 4000 * However, if we are on MPAv2 and want to retry with MPAv1
4001 * then, don't wake up yet.
8da7e7a5 4002 */
7c0a33d6
VP		 4003 if (mpa_rev == 2 && !ep->tried_with_mpa_v1) {
4004 if (ep->com.state != MPA_REQ_SENT)
4005 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
4006 } else
4007 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
8da7e7a5
SW		 4008 sched(dev, skb);
4009 return 0;
4010}
4011
be4c9bad
RD		 4012/*
4013 * Most upcalls from the T4 Core go to sched() to
4014 * schedule the processing on a work queue.
4015 */
4016c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
4017 [CPL_ACT_ESTABLISH] = sched,
4018 [CPL_ACT_OPEN_RPL] = sched,
4019 [CPL_RX_DATA] = sched,
4020 [CPL_ABORT_RPL_RSS] = sched,
4021 [CPL_ABORT_RPL] = sched,
4022 [CPL_PASS_OPEN_RPL] = sched,
4023 [CPL_CLOSE_LISTSRV_RPL] = sched,
4024 [CPL_PASS_ACCEPT_REQ] = sched,
4025 [CPL_PASS_ESTABLISH] = sched,
4026 [CPL_PEER_CLOSE] = sched,
4027 [CPL_CLOSE_CON_RPL] = sched,
8da7e7a5 4028 [CPL_ABORT_REQ_RSS] = peer_abort_intr,
be4c9bad
RD		 4029 [CPL_RDMA_TERMINATE] = sched,
4030 [CPL_FW4_ACK] = sched,
4031 [CPL_SET_TCB_RPL] = set_tcb_rpl,
1cab775c
VP		 4032 [CPL_FW6_MSG] = fw6_msg,
4033 [CPL_RX_PKT] = sched
be4c9bad
RD		 4034};
4035
cfdda9d7
SW		 4036int __init c4iw_cm_init(void)
4037{
be4c9bad 4038 spin_lock_init(&timeout_lock);
cfdda9d7
SW		 4039 skb_queue_head_init(&rxq);
4040
4041 workq = create_singlethread_workqueue("iw_cxgb4");
4042 if (!workq)
4043 return -ENOMEM;
4044
cfdda9d7
SW		 4045 return 0;
4046}
4047
46c1376d 4048void c4iw_cm_term(void)
cfdda9d7 4049{
be4c9bad 4050 WARN_ON(!list_empty(&timeout_list));
cfdda9d7
SW		 4051 flush_workqueue(workq);
4052 destroy_workqueue(workq);
4053}
Linux kernel - Deliverables
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