cm.c 118 KB

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  1. /*
  2. * Copyright (c) 2009-2014 Chelsio, Inc. All rights reserved.
  3. *
  4. * This software is available to you under a choice of one of two
  5. * licenses. You may choose to be licensed under the terms of the GNU
  6. * General Public License (GPL) Version 2, available from the file
  7. * COPYING in the main directory of this source tree, or the
  8. * OpenIB.org BSD license below:
  9. *
  10. * Redistribution and use in source and binary forms, with or
  11. * without modification, are permitted provided that the following
  12. * conditions are met:
  13. *
  14. * - Redistributions of source code must retain the above
  15. * copyright notice, this list of conditions and the following
  16. * disclaimer.
  17. *
  18. * - Redistributions in binary form must reproduce the above
  19. * copyright notice, this list of conditions and the following
  20. * disclaimer in the documentation and/or other materials
  21. * provided with the distribution.
  22. *
  23. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24. * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25. * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26. * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27. * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28. * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29. * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30. * SOFTWARE.
  31. */
  32. #include <linux/module.h>
  33. #include <linux/list.h>
  34. #include <linux/workqueue.h>
  35. #include <linux/skbuff.h>
  36. #include <linux/timer.h>
  37. #include <linux/notifier.h>
  38. #include <linux/inetdevice.h>
  39. #include <linux/ip.h>
  40. #include <linux/tcp.h>
  41. #include <linux/if_vlan.h>
  42. #include <net/neighbour.h>
  43. #include <net/netevent.h>
  44. #include <net/route.h>
  45. #include <net/tcp.h>
  46. #include <net/ip6_route.h>
  47. #include <net/addrconf.h>
  48. #include <rdma/ib_addr.h>
  49. #include "iw_cxgb4.h"
  50. #include "clip_tbl.h"
  51. static char *states[] = {
  52. "idle",
  53. "listen",
  54. "connecting",
  55. "mpa_wait_req",
  56. "mpa_req_sent",
  57. "mpa_req_rcvd",
  58. "mpa_rep_sent",
  59. "fpdu_mode",
  60. "aborting",
  61. "closing",
  62. "moribund",
  63. "dead",
  64. NULL,
  65. };
  66. static int nocong;
  67. module_param(nocong, int, 0644);
  68. MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
  69. static int enable_ecn;
  70. module_param(enable_ecn, int, 0644);
  71. MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
  72. static int dack_mode = 1;
  73. module_param(dack_mode, int, 0644);
  74. MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
  75. uint c4iw_max_read_depth = 32;
  76. module_param(c4iw_max_read_depth, int, 0644);
  77. MODULE_PARM_DESC(c4iw_max_read_depth,
  78. "Per-connection max ORD/IRD (default=32)");
  79. static int enable_tcp_timestamps;
  80. module_param(enable_tcp_timestamps, int, 0644);
  81. MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
  82. static int enable_tcp_sack;
  83. module_param(enable_tcp_sack, int, 0644);
  84. MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
  85. static int enable_tcp_window_scaling = 1;
  86. module_param(enable_tcp_window_scaling, int, 0644);
  87. MODULE_PARM_DESC(enable_tcp_window_scaling,
  88. "Enable tcp window scaling (default=1)");
  89. int c4iw_debug;
  90. module_param(c4iw_debug, int, 0644);
  91. MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
  92. static int peer2peer = 1;
  93. module_param(peer2peer, int, 0644);
  94. MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
  95. static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
  96. module_param(p2p_type, int, 0644);
  97. MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
  98. "1=RDMA_READ 0=RDMA_WRITE (default 1)");
  99. static int ep_timeout_secs = 60;
  100. module_param(ep_timeout_secs, int, 0644);
  101. MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
  102. "in seconds (default=60)");
  103. static int mpa_rev = 2;
  104. module_param(mpa_rev, int, 0644);
  105. MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
  106. "1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft"
  107. " compliant (default=2)");
  108. static int markers_enabled;
  109. module_param(markers_enabled, int, 0644);
  110. MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
  111. static int crc_enabled = 1;
  112. module_param(crc_enabled, int, 0644);
  113. MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
  114. static int rcv_win = 256 * 1024;
  115. module_param(rcv_win, int, 0644);
  116. MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
  117. static int snd_win = 128 * 1024;
  118. module_param(snd_win, int, 0644);
  119. MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
  120. static struct workqueue_struct *workq;
  121. static struct sk_buff_head rxq;
  122. static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
  123. static void ep_timeout(unsigned long arg);
  124. static void connect_reply_upcall(struct c4iw_ep *ep, int status);
  125. static int sched(struct c4iw_dev *dev, struct sk_buff *skb);
  126. static LIST_HEAD(timeout_list);
  127. static spinlock_t timeout_lock;
  128. static void deref_cm_id(struct c4iw_ep_common *epc)
  129. {
  130. epc->cm_id->rem_ref(epc->cm_id);
  131. epc->cm_id = NULL;
  132. set_bit(CM_ID_DEREFED, &epc->history);
  133. }
  134. static void ref_cm_id(struct c4iw_ep_common *epc)
  135. {
  136. set_bit(CM_ID_REFED, &epc->history);
  137. epc->cm_id->add_ref(epc->cm_id);
  138. }
  139. static void deref_qp(struct c4iw_ep *ep)
  140. {
  141. c4iw_qp_rem_ref(&ep->com.qp->ibqp);
  142. clear_bit(QP_REFERENCED, &ep->com.flags);
  143. set_bit(QP_DEREFED, &ep->com.history);
  144. }
  145. static void ref_qp(struct c4iw_ep *ep)
  146. {
  147. set_bit(QP_REFERENCED, &ep->com.flags);
  148. set_bit(QP_REFED, &ep->com.history);
  149. c4iw_qp_add_ref(&ep->com.qp->ibqp);
  150. }
  151. static void start_ep_timer(struct c4iw_ep *ep)
  152. {
  153. PDBG("%s ep %p\n", __func__, ep);
  154. if (timer_pending(&ep->timer)) {
  155. pr_err("%s timer already started! ep %p\n",
  156. __func__, ep);
  157. return;
  158. }
  159. clear_bit(TIMEOUT, &ep->com.flags);
  160. c4iw_get_ep(&ep->com);
  161. ep->timer.expires = jiffies + ep_timeout_secs * HZ;
  162. ep->timer.data = (unsigned long)ep;
  163. ep->timer.function = ep_timeout;
  164. add_timer(&ep->timer);
  165. }
  166. static int stop_ep_timer(struct c4iw_ep *ep)
  167. {
  168. PDBG("%s ep %p stopping\n", __func__, ep);
  169. del_timer_sync(&ep->timer);
  170. if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
  171. c4iw_put_ep(&ep->com);
  172. return 0;
  173. }
  174. return 1;
  175. }
  176. static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
  177. struct l2t_entry *l2e)
  178. {
  179. int error = 0;
  180. if (c4iw_fatal_error(rdev)) {
  181. kfree_skb(skb);
  182. PDBG("%s - device in error state - dropping\n", __func__);
  183. return -EIO;
  184. }
  185. error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
  186. if (error < 0)
  187. kfree_skb(skb);
  188. else if (error == NET_XMIT_DROP)
  189. return -ENOMEM;
  190. return error < 0 ? error : 0;
  191. }
  192. int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
  193. {
  194. int error = 0;
  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_ofld_send(rdev->lldi.ports[0], skb);
  201. if (error < 0)
  202. kfree_skb(skb);
  203. return error < 0 ? error : 0;
  204. }
  205. static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
  206. {
  207. struct cpl_tid_release *req;
  208. skb = get_skb(skb, sizeof *req, GFP_KERNEL);
  209. if (!skb)
  210. return;
  211. req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
  212. INIT_TP_WR(req, hwtid);
  213. OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
  214. set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
  215. c4iw_ofld_send(rdev, skb);
  216. return;
  217. }
  218. static void set_emss(struct c4iw_ep *ep, u16 opt)
  219. {
  220. ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] -
  221. ((AF_INET == ep->com.remote_addr.ss_family) ?
  222. sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
  223. sizeof(struct tcphdr);
  224. ep->mss = ep->emss;
  225. if (TCPOPT_TSTAMP_G(opt))
  226. ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
  227. if (ep->emss < 128)
  228. ep->emss = 128;
  229. if (ep->emss & 7)
  230. PDBG("Warning: misaligned mtu idx %u mss %u emss=%u\n",
  231. TCPOPT_MSS_G(opt), ep->mss, ep->emss);
  232. PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt),
  233. ep->mss, ep->emss);
  234. }
  235. static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
  236. {
  237. enum c4iw_ep_state state;
  238. mutex_lock(&epc->mutex);
  239. state = epc->state;
  240. mutex_unlock(&epc->mutex);
  241. return state;
  242. }
  243. static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
  244. {
  245. epc->state = new;
  246. }
  247. static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
  248. {
  249. mutex_lock(&epc->mutex);
  250. PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
  251. __state_set(epc, new);
  252. mutex_unlock(&epc->mutex);
  253. return;
  254. }
  255. static int alloc_ep_skb_list(struct sk_buff_head *ep_skb_list, int size)
  256. {
  257. struct sk_buff *skb;
  258. unsigned int i;
  259. size_t len;
  260. len = roundup(sizeof(union cpl_wr_size), 16);
  261. for (i = 0; i < size; i++) {
  262. skb = alloc_skb(len, GFP_KERNEL);
  263. if (!skb)
  264. goto fail;
  265. skb_queue_tail(ep_skb_list, skb);
  266. }
  267. return 0;
  268. fail:
  269. skb_queue_purge(ep_skb_list);
  270. return -ENOMEM;
  271. }
  272. static void *alloc_ep(int size, gfp_t gfp)
  273. {
  274. struct c4iw_ep_common *epc;
  275. epc = kzalloc(size, gfp);
  276. if (epc) {
  277. kref_init(&epc->kref);
  278. mutex_init(&epc->mutex);
  279. c4iw_init_wr_wait(&epc->wr_wait);
  280. }
  281. PDBG("%s alloc ep %p\n", __func__, epc);
  282. return epc;
  283. }
  284. static void remove_ep_tid(struct c4iw_ep *ep)
  285. {
  286. unsigned long flags;
  287. spin_lock_irqsave(&ep->com.dev->lock, flags);
  288. _remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid, 0);
  289. spin_unlock_irqrestore(&ep->com.dev->lock, flags);
  290. }
  291. static void insert_ep_tid(struct c4iw_ep *ep)
  292. {
  293. unsigned long flags;
  294. spin_lock_irqsave(&ep->com.dev->lock, flags);
  295. _insert_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep, ep->hwtid, 0);
  296. spin_unlock_irqrestore(&ep->com.dev->lock, flags);
  297. }
  298. /*
  299. * Atomically lookup the ep ptr given the tid and grab a reference on the ep.
  300. */
  301. static struct c4iw_ep *get_ep_from_tid(struct c4iw_dev *dev, unsigned int tid)
  302. {
  303. struct c4iw_ep *ep;
  304. unsigned long flags;
  305. spin_lock_irqsave(&dev->lock, flags);
  306. ep = idr_find(&dev->hwtid_idr, tid);
  307. if (ep)
  308. c4iw_get_ep(&ep->com);
  309. spin_unlock_irqrestore(&dev->lock, flags);
  310. return ep;
  311. }
  312. /*
  313. * Atomically lookup the ep ptr given the stid and grab a reference on the ep.
  314. */
  315. static struct c4iw_listen_ep *get_ep_from_stid(struct c4iw_dev *dev,
  316. unsigned int stid)
  317. {
  318. struct c4iw_listen_ep *ep;
  319. unsigned long flags;
  320. spin_lock_irqsave(&dev->lock, flags);
  321. ep = idr_find(&dev->stid_idr, stid);
  322. if (ep)
  323. c4iw_get_ep(&ep->com);
  324. spin_unlock_irqrestore(&dev->lock, flags);
  325. return ep;
  326. }
  327. void _c4iw_free_ep(struct kref *kref)
  328. {
  329. struct c4iw_ep *ep;
  330. ep = container_of(kref, struct c4iw_ep, com.kref);
  331. PDBG("%s ep %p state %s\n", __func__, ep, states[ep->com.state]);
  332. if (test_bit(QP_REFERENCED, &ep->com.flags))
  333. deref_qp(ep);
  334. if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
  335. if (ep->com.remote_addr.ss_family == AF_INET6) {
  336. struct sockaddr_in6 *sin6 =
  337. (struct sockaddr_in6 *)
  338. &ep->com.local_addr;
  339. cxgb4_clip_release(
  340. ep->com.dev->rdev.lldi.ports[0],
  341. (const u32 *)&sin6->sin6_addr.s6_addr,
  342. 1);
  343. }
  344. cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
  345. dst_release(ep->dst);
  346. cxgb4_l2t_release(ep->l2t);
  347. if (ep->mpa_skb)
  348. kfree_skb(ep->mpa_skb);
  349. }
  350. if (!skb_queue_empty(&ep->com.ep_skb_list))
  351. skb_queue_purge(&ep->com.ep_skb_list);
  352. kfree(ep);
  353. }
  354. static void release_ep_resources(struct c4iw_ep *ep)
  355. {
  356. set_bit(RELEASE_RESOURCES, &ep->com.flags);
  357. /*
  358. * If we have a hwtid, then remove it from the idr table
  359. * so lookups will no longer find this endpoint. Otherwise
  360. * we have a race where one thread finds the ep ptr just
  361. * before the other thread is freeing the ep memory.
  362. */
  363. if (ep->hwtid != -1)
  364. remove_ep_tid(ep);
  365. c4iw_put_ep(&ep->com);
  366. }
  367. static int status2errno(int status)
  368. {
  369. switch (status) {
  370. case CPL_ERR_NONE:
  371. return 0;
  372. case CPL_ERR_CONN_RESET:
  373. return -ECONNRESET;
  374. case CPL_ERR_ARP_MISS:
  375. return -EHOSTUNREACH;
  376. case CPL_ERR_CONN_TIMEDOUT:
  377. return -ETIMEDOUT;
  378. case CPL_ERR_TCAM_FULL:
  379. return -ENOMEM;
  380. case CPL_ERR_CONN_EXIST:
  381. return -EADDRINUSE;
  382. default:
  383. return -EIO;
  384. }
  385. }
  386. /*
  387. * Try and reuse skbs already allocated...
  388. */
  389. static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
  390. {
  391. if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
  392. skb_trim(skb, 0);
  393. skb_get(skb);
  394. skb_reset_transport_header(skb);
  395. } else {
  396. skb = alloc_skb(len, gfp);
  397. }
  398. t4_set_arp_err_handler(skb, NULL, NULL);
  399. return skb;
  400. }
  401. static struct net_device *get_real_dev(struct net_device *egress_dev)
  402. {
  403. return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
  404. }
  405. static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
  406. {
  407. int i;
  408. egress_dev = get_real_dev(egress_dev);
  409. for (i = 0; i < dev->rdev.lldi.nports; i++)
  410. if (dev->rdev.lldi.ports[i] == egress_dev)
  411. return 1;
  412. return 0;
  413. }
  414. static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
  415. __u8 *peer_ip, __be16 local_port,
  416. __be16 peer_port, u8 tos,
  417. __u32 sin6_scope_id)
  418. {
  419. struct dst_entry *dst = NULL;
  420. if (IS_ENABLED(CONFIG_IPV6)) {
  421. struct flowi6 fl6;
  422. memset(&fl6, 0, sizeof(fl6));
  423. memcpy(&fl6.daddr, peer_ip, 16);
  424. memcpy(&fl6.saddr, local_ip, 16);
  425. if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
  426. fl6.flowi6_oif = sin6_scope_id;
  427. dst = ip6_route_output(&init_net, NULL, &fl6);
  428. if (!dst)
  429. goto out;
  430. if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
  431. !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
  432. dst_release(dst);
  433. dst = NULL;
  434. }
  435. }
  436. out:
  437. return dst;
  438. }
  439. static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip,
  440. __be32 peer_ip, __be16 local_port,
  441. __be16 peer_port, u8 tos)
  442. {
  443. struct rtable *rt;
  444. struct flowi4 fl4;
  445. struct neighbour *n;
  446. rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
  447. peer_port, local_port, IPPROTO_TCP,
  448. tos, 0);
  449. if (IS_ERR(rt))
  450. return NULL;
  451. n = dst_neigh_lookup(&rt->dst, &peer_ip);
  452. if (!n)
  453. return NULL;
  454. if (!our_interface(dev, n->dev) &&
  455. !(n->dev->flags & IFF_LOOPBACK)) {
  456. neigh_release(n);
  457. dst_release(&rt->dst);
  458. return NULL;
  459. }
  460. neigh_release(n);
  461. return &rt->dst;
  462. }
  463. static void arp_failure_discard(void *handle, struct sk_buff *skb)
  464. {
  465. pr_err(MOD "ARP failure\n");
  466. kfree_skb(skb);
  467. }
  468. static void mpa_start_arp_failure(void *handle, struct sk_buff *skb)
  469. {
  470. pr_err("ARP failure during MPA Negotiation - Closing Connection\n");
  471. }
  472. enum {
  473. NUM_FAKE_CPLS = 2,
  474. FAKE_CPL_PUT_EP_SAFE = NUM_CPL_CMDS + 0,
  475. FAKE_CPL_PASS_PUT_EP_SAFE = NUM_CPL_CMDS + 1,
  476. };
  477. static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
  478. {
  479. struct c4iw_ep *ep;
  480. ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
  481. release_ep_resources(ep);
  482. return 0;
  483. }
  484. static int _put_pass_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
  485. {
  486. struct c4iw_ep *ep;
  487. ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
  488. c4iw_put_ep(&ep->parent_ep->com);
  489. release_ep_resources(ep);
  490. return 0;
  491. }
  492. /*
  493. * Fake up a special CPL opcode and call sched() so process_work() will call
  494. * _put_ep_safe() in a safe context to free the ep resources. This is needed
  495. * because ARP error handlers are called in an ATOMIC context, and
  496. * _c4iw_free_ep() needs to block.
  497. */
  498. static void queue_arp_failure_cpl(struct c4iw_ep *ep, struct sk_buff *skb,
  499. int cpl)
  500. {
  501. struct cpl_act_establish *rpl = cplhdr(skb);
  502. /* Set our special ARP_FAILURE opcode */
  503. rpl->ot.opcode = cpl;
  504. /*
  505. * Save ep in the skb->cb area, after where sched() will save the dev
  506. * ptr.
  507. */
  508. *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))) = ep;
  509. sched(ep->com.dev, skb);
  510. }
  511. /* Handle an ARP failure for an accept */
  512. static void pass_accept_rpl_arp_failure(void *handle, struct sk_buff *skb)
  513. {
  514. struct c4iw_ep *ep = handle;
  515. pr_err(MOD "ARP failure during accept - tid %u -dropping connection\n",
  516. ep->hwtid);
  517. __state_set(&ep->com, DEAD);
  518. queue_arp_failure_cpl(ep, skb, FAKE_CPL_PASS_PUT_EP_SAFE);
  519. }
  520. /*
  521. * Handle an ARP failure for an active open.
  522. */
  523. static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
  524. {
  525. struct c4iw_ep *ep = handle;
  526. printk(KERN_ERR MOD "ARP failure during connect\n");
  527. connect_reply_upcall(ep, -EHOSTUNREACH);
  528. __state_set(&ep->com, DEAD);
  529. if (ep->com.remote_addr.ss_family == AF_INET6) {
  530. struct sockaddr_in6 *sin6 =
  531. (struct sockaddr_in6 *)&ep->com.local_addr;
  532. cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
  533. (const u32 *)&sin6->sin6_addr.s6_addr, 1);
  534. }
  535. remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
  536. cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
  537. queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
  538. }
  539. /*
  540. * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
  541. * and send it along.
  542. */
  543. static void abort_arp_failure(void *handle, struct sk_buff *skb)
  544. {
  545. int ret;
  546. struct c4iw_ep *ep = handle;
  547. struct c4iw_rdev *rdev = &ep->com.dev->rdev;
  548. struct cpl_abort_req *req = cplhdr(skb);
  549. PDBG("%s rdev %p\n", __func__, rdev);
  550. req->cmd = CPL_ABORT_NO_RST;
  551. ret = c4iw_ofld_send(rdev, skb);
  552. if (ret) {
  553. __state_set(&ep->com, DEAD);
  554. queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE);
  555. }
  556. }
  557. static int send_flowc(struct c4iw_ep *ep)
  558. {
  559. struct fw_flowc_wr *flowc;
  560. struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
  561. int i;
  562. u16 vlan = ep->l2t->vlan;
  563. int nparams;
  564. if (WARN_ON(!skb))
  565. return -ENOMEM;
  566. if (vlan == CPL_L2T_VLAN_NONE)
  567. nparams = 8;
  568. else
  569. nparams = 9;
  570. flowc = (struct fw_flowc_wr *)__skb_put(skb, FLOWC_LEN);
  571. flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
  572. FW_FLOWC_WR_NPARAMS_V(nparams));
  573. flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(DIV_ROUND_UP(FLOWC_LEN,
  574. 16)) | FW_WR_FLOWID_V(ep->hwtid));
  575. flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
  576. flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
  577. (ep->com.dev->rdev.lldi.pf));
  578. flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
  579. flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
  580. flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
  581. flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
  582. flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
  583. flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
  584. flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
  585. flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
  586. flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
  587. flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
  588. flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
  589. flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
  590. flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
  591. flowc->mnemval[7].val = cpu_to_be32(ep->emss);
  592. if (nparams == 9) {
  593. u16 pri;
  594. pri = (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
  595. flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS;
  596. flowc->mnemval[8].val = cpu_to_be32(pri);
  597. } else {
  598. /* Pad WR to 16 byte boundary */
  599. flowc->mnemval[8].mnemonic = 0;
  600. flowc->mnemval[8].val = 0;
  601. }
  602. for (i = 0; i < 9; i++) {
  603. flowc->mnemval[i].r4[0] = 0;
  604. flowc->mnemval[i].r4[1] = 0;
  605. flowc->mnemval[i].r4[2] = 0;
  606. }
  607. set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
  608. return c4iw_ofld_send(&ep->com.dev->rdev, skb);
  609. }
  610. static int send_halfclose(struct c4iw_ep *ep)
  611. {
  612. struct cpl_close_con_req *req;
  613. struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list);
  614. int wrlen = roundup(sizeof *req, 16);
  615. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  616. if (WARN_ON(!skb))
  617. return -ENOMEM;
  618. set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
  619. t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
  620. req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
  621. memset(req, 0, wrlen);
  622. INIT_TP_WR(req, ep->hwtid);
  623. OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
  624. ep->hwtid));
  625. return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
  626. }
  627. static int send_abort(struct c4iw_ep *ep)
  628. {
  629. struct cpl_abort_req *req;
  630. int wrlen = roundup(sizeof *req, 16);
  631. struct sk_buff *req_skb = skb_dequeue(&ep->com.ep_skb_list);
  632. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  633. if (WARN_ON(!req_skb))
  634. return -ENOMEM;
  635. set_wr_txq(req_skb, CPL_PRIORITY_DATA, ep->txq_idx);
  636. t4_set_arp_err_handler(req_skb, ep, abort_arp_failure);
  637. req = (struct cpl_abort_req *)skb_put(req_skb, wrlen);
  638. memset(req, 0, wrlen);
  639. INIT_TP_WR(req, ep->hwtid);
  640. OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
  641. req->cmd = CPL_ABORT_SEND_RST;
  642. return c4iw_l2t_send(&ep->com.dev->rdev, req_skb, ep->l2t);
  643. }
  644. static void best_mtu(const unsigned short *mtus, unsigned short mtu,
  645. unsigned int *idx, int use_ts, int ipv6)
  646. {
  647. unsigned short hdr_size = (ipv6 ?
  648. sizeof(struct ipv6hdr) :
  649. sizeof(struct iphdr)) +
  650. sizeof(struct tcphdr) +
  651. (use_ts ?
  652. round_up(TCPOLEN_TIMESTAMP, 4) : 0);
  653. unsigned short data_size = mtu - hdr_size;
  654. cxgb4_best_aligned_mtu(mtus, hdr_size, data_size, 8, idx);
  655. }
  656. static int send_connect(struct c4iw_ep *ep)
  657. {
  658. struct cpl_act_open_req *req = NULL;
  659. struct cpl_t5_act_open_req *t5req = NULL;
  660. struct cpl_t6_act_open_req *t6req = NULL;
  661. struct cpl_act_open_req6 *req6 = NULL;
  662. struct cpl_t5_act_open_req6 *t5req6 = NULL;
  663. struct cpl_t6_act_open_req6 *t6req6 = NULL;
  664. struct sk_buff *skb;
  665. u64 opt0;
  666. u32 opt2;
  667. unsigned int mtu_idx;
  668. int wscale;
  669. int win, sizev4, sizev6, wrlen;
  670. struct sockaddr_in *la = (struct sockaddr_in *)
  671. &ep->com.local_addr;
  672. struct sockaddr_in *ra = (struct sockaddr_in *)
  673. &ep->com.remote_addr;
  674. struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
  675. &ep->com.local_addr;
  676. struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
  677. &ep->com.remote_addr;
  678. int ret;
  679. enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
  680. u32 isn = (prandom_u32() & ~7UL) - 1;
  681. switch (CHELSIO_CHIP_VERSION(adapter_type)) {
  682. case CHELSIO_T4:
  683. sizev4 = sizeof(struct cpl_act_open_req);
  684. sizev6 = sizeof(struct cpl_act_open_req6);
  685. break;
  686. case CHELSIO_T5:
  687. sizev4 = sizeof(struct cpl_t5_act_open_req);
  688. sizev6 = sizeof(struct cpl_t5_act_open_req6);
  689. break;
  690. case CHELSIO_T6:
  691. sizev4 = sizeof(struct cpl_t6_act_open_req);
  692. sizev6 = sizeof(struct cpl_t6_act_open_req6);
  693. break;
  694. default:
  695. pr_err("T%d Chip is not supported\n",
  696. CHELSIO_CHIP_VERSION(adapter_type));
  697. return -EINVAL;
  698. }
  699. wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
  700. roundup(sizev4, 16) :
  701. roundup(sizev6, 16);
  702. PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
  703. skb = get_skb(NULL, wrlen, GFP_KERNEL);
  704. if (!skb) {
  705. printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
  706. __func__);
  707. return -ENOMEM;
  708. }
  709. set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
  710. best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
  711. enable_tcp_timestamps,
  712. (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
  713. wscale = compute_wscale(rcv_win);
  714. /*
  715. * Specify the largest window that will fit in opt0. The
  716. * remainder will be specified in the rx_data_ack.
  717. */
  718. win = ep->rcv_win >> 10;
  719. if (win > RCV_BUFSIZ_M)
  720. win = RCV_BUFSIZ_M;
  721. opt0 = (nocong ? NO_CONG_F : 0) |
  722. KEEP_ALIVE_F |
  723. DELACK_F |
  724. WND_SCALE_V(wscale) |
  725. MSS_IDX_V(mtu_idx) |
  726. L2T_IDX_V(ep->l2t->idx) |
  727. TX_CHAN_V(ep->tx_chan) |
  728. SMAC_SEL_V(ep->smac_idx) |
  729. DSCP_V(ep->tos >> 2) |
  730. ULP_MODE_V(ULP_MODE_TCPDDP) |
  731. RCV_BUFSIZ_V(win);
  732. opt2 = RX_CHANNEL_V(0) |
  733. CCTRL_ECN_V(enable_ecn) |
  734. RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
  735. if (enable_tcp_timestamps)
  736. opt2 |= TSTAMPS_EN_F;
  737. if (enable_tcp_sack)
  738. opt2 |= SACK_EN_F;
  739. if (wscale && enable_tcp_window_scaling)
  740. opt2 |= WND_SCALE_EN_F;
  741. if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
  742. if (peer2peer)
  743. isn += 4;
  744. opt2 |= T5_OPT_2_VALID_F;
  745. opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
  746. opt2 |= T5_ISS_F;
  747. }
  748. if (ep->com.remote_addr.ss_family == AF_INET6)
  749. cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
  750. (const u32 *)&la6->sin6_addr.s6_addr, 1);
  751. t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
  752. if (ep->com.remote_addr.ss_family == AF_INET) {
  753. switch (CHELSIO_CHIP_VERSION(adapter_type)) {
  754. case CHELSIO_T4:
  755. req = (struct cpl_act_open_req *)skb_put(skb, wrlen);
  756. INIT_TP_WR(req, 0);
  757. break;
  758. case CHELSIO_T5:
  759. t5req = (struct cpl_t5_act_open_req *)skb_put(skb,
  760. wrlen);
  761. INIT_TP_WR(t5req, 0);
  762. req = (struct cpl_act_open_req *)t5req;
  763. break;
  764. case CHELSIO_T6:
  765. t6req = (struct cpl_t6_act_open_req *)skb_put(skb,
  766. wrlen);
  767. INIT_TP_WR(t6req, 0);
  768. req = (struct cpl_act_open_req *)t6req;
  769. t5req = (struct cpl_t5_act_open_req *)t6req;
  770. break;
  771. default:
  772. pr_err("T%d Chip is not supported\n",
  773. CHELSIO_CHIP_VERSION(adapter_type));
  774. ret = -EINVAL;
  775. goto clip_release;
  776. }
  777. OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
  778. ((ep->rss_qid<<14) | ep->atid)));
  779. req->local_port = la->sin_port;
  780. req->peer_port = ra->sin_port;
  781. req->local_ip = la->sin_addr.s_addr;
  782. req->peer_ip = ra->sin_addr.s_addr;
  783. req->opt0 = cpu_to_be64(opt0);
  784. if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
  785. req->params = cpu_to_be32(cxgb4_select_ntuple(
  786. ep->com.dev->rdev.lldi.ports[0],
  787. ep->l2t));
  788. req->opt2 = cpu_to_be32(opt2);
  789. } else {
  790. t5req->params = cpu_to_be64(FILTER_TUPLE_V(
  791. cxgb4_select_ntuple(
  792. ep->com.dev->rdev.lldi.ports[0],
  793. ep->l2t)));
  794. t5req->rsvd = cpu_to_be32(isn);
  795. PDBG("%s snd_isn %u\n", __func__, t5req->rsvd);
  796. t5req->opt2 = cpu_to_be32(opt2);
  797. }
  798. } else {
  799. switch (CHELSIO_CHIP_VERSION(adapter_type)) {
  800. case CHELSIO_T4:
  801. req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
  802. INIT_TP_WR(req6, 0);
  803. break;
  804. case CHELSIO_T5:
  805. t5req6 = (struct cpl_t5_act_open_req6 *)skb_put(skb,
  806. wrlen);
  807. INIT_TP_WR(t5req6, 0);
  808. req6 = (struct cpl_act_open_req6 *)t5req6;
  809. break;
  810. case CHELSIO_T6:
  811. t6req6 = (struct cpl_t6_act_open_req6 *)skb_put(skb,
  812. wrlen);
  813. INIT_TP_WR(t6req6, 0);
  814. req6 = (struct cpl_act_open_req6 *)t6req6;
  815. t5req6 = (struct cpl_t5_act_open_req6 *)t6req6;
  816. break;
  817. default:
  818. pr_err("T%d Chip is not supported\n",
  819. CHELSIO_CHIP_VERSION(adapter_type));
  820. ret = -EINVAL;
  821. goto clip_release;
  822. }
  823. OPCODE_TID(req6) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
  824. ((ep->rss_qid<<14)|ep->atid)));
  825. req6->local_port = la6->sin6_port;
  826. req6->peer_port = ra6->sin6_port;
  827. req6->local_ip_hi = *((__be64 *)(la6->sin6_addr.s6_addr));
  828. req6->local_ip_lo = *((__be64 *)(la6->sin6_addr.s6_addr + 8));
  829. req6->peer_ip_hi = *((__be64 *)(ra6->sin6_addr.s6_addr));
  830. req6->peer_ip_lo = *((__be64 *)(ra6->sin6_addr.s6_addr + 8));
  831. req6->opt0 = cpu_to_be64(opt0);
  832. if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
  833. req6->params = cpu_to_be32(cxgb4_select_ntuple(
  834. ep->com.dev->rdev.lldi.ports[0],
  835. ep->l2t));
  836. req6->opt2 = cpu_to_be32(opt2);
  837. } else {
  838. t5req6->params = cpu_to_be64(FILTER_TUPLE_V(
  839. cxgb4_select_ntuple(
  840. ep->com.dev->rdev.lldi.ports[0],
  841. ep->l2t)));
  842. t5req6->rsvd = cpu_to_be32(isn);
  843. PDBG("%s snd_isn %u\n", __func__, t5req6->rsvd);
  844. t5req6->opt2 = cpu_to_be32(opt2);
  845. }
  846. }
  847. set_bit(ACT_OPEN_REQ, &ep->com.history);
  848. ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
  849. clip_release:
  850. if (ret && ep->com.remote_addr.ss_family == AF_INET6)
  851. cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
  852. (const u32 *)&la6->sin6_addr.s6_addr, 1);
  853. return ret;
  854. }
  855. static int send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
  856. u8 mpa_rev_to_use)
  857. {
  858. int mpalen, wrlen, ret;
  859. struct fw_ofld_tx_data_wr *req;
  860. struct mpa_message *mpa;
  861. struct mpa_v2_conn_params mpa_v2_params;
  862. PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
  863. BUG_ON(skb_cloned(skb));
  864. mpalen = sizeof(*mpa) + ep->plen;
  865. if (mpa_rev_to_use == 2)
  866. mpalen += sizeof(struct mpa_v2_conn_params);
  867. wrlen = roundup(mpalen + sizeof *req, 16);
  868. skb = get_skb(skb, wrlen, GFP_KERNEL);
  869. if (!skb) {
  870. connect_reply_upcall(ep, -ENOMEM);
  871. return -ENOMEM;
  872. }
  873. set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
  874. req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
  875. memset(req, 0, wrlen);
  876. req->op_to_immdlen = cpu_to_be32(
  877. FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
  878. FW_WR_COMPL_F |
  879. FW_WR_IMMDLEN_V(mpalen));
  880. req->flowid_len16 = cpu_to_be32(
  881. FW_WR_FLOWID_V(ep->hwtid) |
  882. FW_WR_LEN16_V(wrlen >> 4));
  883. req->plen = cpu_to_be32(mpalen);
  884. req->tunnel_to_proxy = cpu_to_be32(
  885. FW_OFLD_TX_DATA_WR_FLUSH_F |
  886. FW_OFLD_TX_DATA_WR_SHOVE_F);
  887. mpa = (struct mpa_message *)(req + 1);
  888. memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
  889. mpa->flags = 0;
  890. if (crc_enabled)
  891. mpa->flags |= MPA_CRC;
  892. if (markers_enabled) {
  893. mpa->flags |= MPA_MARKERS;
  894. ep->mpa_attr.recv_marker_enabled = 1;
  895. } else {
  896. ep->mpa_attr.recv_marker_enabled = 0;
  897. }
  898. if (mpa_rev_to_use == 2)
  899. mpa->flags |= MPA_ENHANCED_RDMA_CONN;
  900. mpa->private_data_size = htons(ep->plen);
  901. mpa->revision = mpa_rev_to_use;
  902. if (mpa_rev_to_use == 1) {
  903. ep->tried_with_mpa_v1 = 1;
  904. ep->retry_with_mpa_v1 = 0;
  905. }
  906. if (mpa_rev_to_use == 2) {
  907. mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
  908. sizeof (struct mpa_v2_conn_params));
  909. PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
  910. ep->ord);
  911. mpa_v2_params.ird = htons((u16)ep->ird);
  912. mpa_v2_params.ord = htons((u16)ep->ord);
  913. if (peer2peer) {
  914. mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
  915. if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
  916. mpa_v2_params.ord |=
  917. htons(MPA_V2_RDMA_WRITE_RTR);
  918. else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
  919. mpa_v2_params.ord |=
  920. htons(MPA_V2_RDMA_READ_RTR);
  921. }
  922. memcpy(mpa->private_data, &mpa_v2_params,
  923. sizeof(struct mpa_v2_conn_params));
  924. if (ep->plen)
  925. memcpy(mpa->private_data +
  926. sizeof(struct mpa_v2_conn_params),
  927. ep->mpa_pkt + sizeof(*mpa), ep->plen);
  928. } else
  929. if (ep->plen)
  930. memcpy(mpa->private_data,
  931. ep->mpa_pkt + sizeof(*mpa), ep->plen);
  932. /*
  933. * Reference the mpa skb. This ensures the data area
  934. * will remain in memory until the hw acks the tx.
  935. * Function fw4_ack() will deref it.
  936. */
  937. skb_get(skb);
  938. t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
  939. BUG_ON(ep->mpa_skb);
  940. ep->mpa_skb = skb;
  941. ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
  942. if (ret)
  943. return ret;
  944. start_ep_timer(ep);
  945. __state_set(&ep->com, MPA_REQ_SENT);
  946. ep->mpa_attr.initiator = 1;
  947. ep->snd_seq += mpalen;
  948. return ret;
  949. }
  950. static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
  951. {
  952. int mpalen, wrlen;
  953. struct fw_ofld_tx_data_wr *req;
  954. struct mpa_message *mpa;
  955. struct sk_buff *skb;
  956. struct mpa_v2_conn_params mpa_v2_params;
  957. PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
  958. mpalen = sizeof(*mpa) + plen;
  959. if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
  960. mpalen += sizeof(struct mpa_v2_conn_params);
  961. wrlen = roundup(mpalen + sizeof *req, 16);
  962. skb = get_skb(NULL, wrlen, GFP_KERNEL);
  963. if (!skb) {
  964. printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
  965. return -ENOMEM;
  966. }
  967. set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
  968. req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
  969. memset(req, 0, wrlen);
  970. req->op_to_immdlen = cpu_to_be32(
  971. FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
  972. FW_WR_COMPL_F |
  973. FW_WR_IMMDLEN_V(mpalen));
  974. req->flowid_len16 = cpu_to_be32(
  975. FW_WR_FLOWID_V(ep->hwtid) |
  976. FW_WR_LEN16_V(wrlen >> 4));
  977. req->plen = cpu_to_be32(mpalen);
  978. req->tunnel_to_proxy = cpu_to_be32(
  979. FW_OFLD_TX_DATA_WR_FLUSH_F |
  980. FW_OFLD_TX_DATA_WR_SHOVE_F);
  981. mpa = (struct mpa_message *)(req + 1);
  982. memset(mpa, 0, sizeof(*mpa));
  983. memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
  984. mpa->flags = MPA_REJECT;
  985. mpa->revision = ep->mpa_attr.version;
  986. mpa->private_data_size = htons(plen);
  987. if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
  988. mpa->flags |= MPA_ENHANCED_RDMA_CONN;
  989. mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
  990. sizeof (struct mpa_v2_conn_params));
  991. mpa_v2_params.ird = htons(((u16)ep->ird) |
  992. (peer2peer ? MPA_V2_PEER2PEER_MODEL :
  993. 0));
  994. mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
  995. (p2p_type ==
  996. FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
  997. MPA_V2_RDMA_WRITE_RTR : p2p_type ==
  998. FW_RI_INIT_P2PTYPE_READ_REQ ?
  999. MPA_V2_RDMA_READ_RTR : 0) : 0));
  1000. memcpy(mpa->private_data, &mpa_v2_params,
  1001. sizeof(struct mpa_v2_conn_params));
  1002. if (ep->plen)
  1003. memcpy(mpa->private_data +
  1004. sizeof(struct mpa_v2_conn_params), pdata, plen);
  1005. } else
  1006. if (plen)
  1007. memcpy(mpa->private_data, pdata, plen);
  1008. /*
  1009. * Reference the mpa skb again. This ensures the data area
  1010. * will remain in memory until the hw acks the tx.
  1011. * Function fw4_ack() will deref it.
  1012. */
  1013. skb_get(skb);
  1014. set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
  1015. t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
  1016. BUG_ON(ep->mpa_skb);
  1017. ep->mpa_skb = skb;
  1018. ep->snd_seq += mpalen;
  1019. return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
  1020. }
  1021. static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
  1022. {
  1023. int mpalen, wrlen;
  1024. struct fw_ofld_tx_data_wr *req;
  1025. struct mpa_message *mpa;
  1026. struct sk_buff *skb;
  1027. struct mpa_v2_conn_params mpa_v2_params;
  1028. PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
  1029. mpalen = sizeof(*mpa) + plen;
  1030. if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
  1031. mpalen += sizeof(struct mpa_v2_conn_params);
  1032. wrlen = roundup(mpalen + sizeof *req, 16);
  1033. skb = get_skb(NULL, wrlen, GFP_KERNEL);
  1034. if (!skb) {
  1035. printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
  1036. return -ENOMEM;
  1037. }
  1038. set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
  1039. req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
  1040. memset(req, 0, wrlen);
  1041. req->op_to_immdlen = cpu_to_be32(
  1042. FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
  1043. FW_WR_COMPL_F |
  1044. FW_WR_IMMDLEN_V(mpalen));
  1045. req->flowid_len16 = cpu_to_be32(
  1046. FW_WR_FLOWID_V(ep->hwtid) |
  1047. FW_WR_LEN16_V(wrlen >> 4));
  1048. req->plen = cpu_to_be32(mpalen);
  1049. req->tunnel_to_proxy = cpu_to_be32(
  1050. FW_OFLD_TX_DATA_WR_FLUSH_F |
  1051. FW_OFLD_TX_DATA_WR_SHOVE_F);
  1052. mpa = (struct mpa_message *)(req + 1);
  1053. memset(mpa, 0, sizeof(*mpa));
  1054. memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
  1055. mpa->flags = 0;
  1056. if (ep->mpa_attr.crc_enabled)
  1057. mpa->flags |= MPA_CRC;
  1058. if (ep->mpa_attr.recv_marker_enabled)
  1059. mpa->flags |= MPA_MARKERS;
  1060. mpa->revision = ep->mpa_attr.version;
  1061. mpa->private_data_size = htons(plen);
  1062. if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
  1063. mpa->flags |= MPA_ENHANCED_RDMA_CONN;
  1064. mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
  1065. sizeof (struct mpa_v2_conn_params));
  1066. mpa_v2_params.ird = htons((u16)ep->ird);
  1067. mpa_v2_params.ord = htons((u16)ep->ord);
  1068. if (peer2peer && (ep->mpa_attr.p2p_type !=
  1069. FW_RI_INIT_P2PTYPE_DISABLED)) {
  1070. mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
  1071. if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
  1072. mpa_v2_params.ord |=
  1073. htons(MPA_V2_RDMA_WRITE_RTR);
  1074. else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
  1075. mpa_v2_params.ord |=
  1076. htons(MPA_V2_RDMA_READ_RTR);
  1077. }
  1078. memcpy(mpa->private_data, &mpa_v2_params,
  1079. sizeof(struct mpa_v2_conn_params));
  1080. if (ep->plen)
  1081. memcpy(mpa->private_data +
  1082. sizeof(struct mpa_v2_conn_params), pdata, plen);
  1083. } else
  1084. if (plen)
  1085. memcpy(mpa->private_data, pdata, plen);
  1086. /*
  1087. * Reference the mpa skb. This ensures the data area
  1088. * will remain in memory until the hw acks the tx.
  1089. * Function fw4_ack() will deref it.
  1090. */
  1091. skb_get(skb);
  1092. t4_set_arp_err_handler(skb, NULL, mpa_start_arp_failure);
  1093. ep->mpa_skb = skb;
  1094. __state_set(&ep->com, MPA_REP_SENT);
  1095. ep->snd_seq += mpalen;
  1096. return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
  1097. }
  1098. static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
  1099. {
  1100. struct c4iw_ep *ep;
  1101. struct cpl_act_establish *req = cplhdr(skb);
  1102. unsigned int tid = GET_TID(req);
  1103. unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
  1104. struct tid_info *t = dev->rdev.lldi.tids;
  1105. int ret;
  1106. ep = lookup_atid(t, atid);
  1107. PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
  1108. be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
  1109. mutex_lock(&ep->com.mutex);
  1110. dst_confirm(ep->dst);
  1111. /* setup the hwtid for this connection */
  1112. ep->hwtid = tid;
  1113. cxgb4_insert_tid(t, ep, tid);
  1114. insert_ep_tid(ep);
  1115. ep->snd_seq = be32_to_cpu(req->snd_isn);
  1116. ep->rcv_seq = be32_to_cpu(req->rcv_isn);
  1117. set_emss(ep, ntohs(req->tcp_opt));
  1118. /* dealloc the atid */
  1119. remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
  1120. cxgb4_free_atid(t, atid);
  1121. set_bit(ACT_ESTAB, &ep->com.history);
  1122. /* start MPA negotiation */
  1123. ret = send_flowc(ep);
  1124. if (ret)
  1125. goto err;
  1126. if (ep->retry_with_mpa_v1)
  1127. ret = send_mpa_req(ep, skb, 1);
  1128. else
  1129. ret = send_mpa_req(ep, skb, mpa_rev);
  1130. if (ret)
  1131. goto err;
  1132. mutex_unlock(&ep->com.mutex);
  1133. return 0;
  1134. err:
  1135. mutex_unlock(&ep->com.mutex);
  1136. connect_reply_upcall(ep, -ENOMEM);
  1137. c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
  1138. return 0;
  1139. }
  1140. static void close_complete_upcall(struct c4iw_ep *ep, int status)
  1141. {
  1142. struct iw_cm_event event;
  1143. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  1144. memset(&event, 0, sizeof(event));
  1145. event.event = IW_CM_EVENT_CLOSE;
  1146. event.status = status;
  1147. if (ep->com.cm_id) {
  1148. PDBG("close complete delivered ep %p cm_id %p tid %u\n",
  1149. ep, ep->com.cm_id, ep->hwtid);
  1150. ep->com.cm_id->event_handler(ep->com.cm_id, &event);
  1151. deref_cm_id(&ep->com);
  1152. set_bit(CLOSE_UPCALL, &ep->com.history);
  1153. }
  1154. }
  1155. static void peer_close_upcall(struct c4iw_ep *ep)
  1156. {
  1157. struct iw_cm_event event;
  1158. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  1159. memset(&event, 0, sizeof(event));
  1160. event.event = IW_CM_EVENT_DISCONNECT;
  1161. if (ep->com.cm_id) {
  1162. PDBG("peer close delivered ep %p cm_id %p tid %u\n",
  1163. ep, ep->com.cm_id, ep->hwtid);
  1164. ep->com.cm_id->event_handler(ep->com.cm_id, &event);
  1165. set_bit(DISCONN_UPCALL, &ep->com.history);
  1166. }
  1167. }
  1168. static void peer_abort_upcall(struct c4iw_ep *ep)
  1169. {
  1170. struct iw_cm_event event;
  1171. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  1172. memset(&event, 0, sizeof(event));
  1173. event.event = IW_CM_EVENT_CLOSE;
  1174. event.status = -ECONNRESET;
  1175. if (ep->com.cm_id) {
  1176. PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
  1177. ep->com.cm_id, ep->hwtid);
  1178. ep->com.cm_id->event_handler(ep->com.cm_id, &event);
  1179. deref_cm_id(&ep->com);
  1180. set_bit(ABORT_UPCALL, &ep->com.history);
  1181. }
  1182. }
  1183. static void connect_reply_upcall(struct c4iw_ep *ep, int status)
  1184. {
  1185. struct iw_cm_event event;
  1186. PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
  1187. memset(&event, 0, sizeof(event));
  1188. event.event = IW_CM_EVENT_CONNECT_REPLY;
  1189. event.status = status;
  1190. memcpy(&event.local_addr, &ep->com.local_addr,
  1191. sizeof(ep->com.local_addr));
  1192. memcpy(&event.remote_addr, &ep->com.remote_addr,
  1193. sizeof(ep->com.remote_addr));
  1194. if ((status == 0) || (status == -ECONNREFUSED)) {
  1195. if (!ep->tried_with_mpa_v1) {
  1196. /* this means MPA_v2 is used */
  1197. event.ord = ep->ird;
  1198. event.ird = ep->ord;
  1199. event.private_data_len = ep->plen -
  1200. sizeof(struct mpa_v2_conn_params);
  1201. event.private_data = ep->mpa_pkt +
  1202. sizeof(struct mpa_message) +
  1203. sizeof(struct mpa_v2_conn_params);
  1204. } else {
  1205. /* this means MPA_v1 is used */
  1206. event.ord = cur_max_read_depth(ep->com.dev);
  1207. event.ird = cur_max_read_depth(ep->com.dev);
  1208. event.private_data_len = ep->plen;
  1209. event.private_data = ep->mpa_pkt +
  1210. sizeof(struct mpa_message);
  1211. }
  1212. }
  1213. PDBG("%s ep %p tid %u status %d\n", __func__, ep,
  1214. ep->hwtid, status);
  1215. set_bit(CONN_RPL_UPCALL, &ep->com.history);
  1216. ep->com.cm_id->event_handler(ep->com.cm_id, &event);
  1217. if (status < 0)
  1218. deref_cm_id(&ep->com);
  1219. }
  1220. static int connect_request_upcall(struct c4iw_ep *ep)
  1221. {
  1222. struct iw_cm_event event;
  1223. int ret;
  1224. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  1225. memset(&event, 0, sizeof(event));
  1226. event.event = IW_CM_EVENT_CONNECT_REQUEST;
  1227. memcpy(&event.local_addr, &ep->com.local_addr,
  1228. sizeof(ep->com.local_addr));
  1229. memcpy(&event.remote_addr, &ep->com.remote_addr,
  1230. sizeof(ep->com.remote_addr));
  1231. event.provider_data = ep;
  1232. if (!ep->tried_with_mpa_v1) {
  1233. /* this means MPA_v2 is used */
  1234. event.ord = ep->ord;
  1235. event.ird = ep->ird;
  1236. event.private_data_len = ep->plen -
  1237. sizeof(struct mpa_v2_conn_params);
  1238. event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
  1239. sizeof(struct mpa_v2_conn_params);
  1240. } else {
  1241. /* this means MPA_v1 is used. Send max supported */
  1242. event.ord = cur_max_read_depth(ep->com.dev);
  1243. event.ird = cur_max_read_depth(ep->com.dev);
  1244. event.private_data_len = ep->plen;
  1245. event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
  1246. }
  1247. c4iw_get_ep(&ep->com);
  1248. ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
  1249. &event);
  1250. if (ret)
  1251. c4iw_put_ep(&ep->com);
  1252. set_bit(CONNREQ_UPCALL, &ep->com.history);
  1253. c4iw_put_ep(&ep->parent_ep->com);
  1254. return ret;
  1255. }
  1256. static void established_upcall(struct c4iw_ep *ep)
  1257. {
  1258. struct iw_cm_event event;
  1259. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  1260. memset(&event, 0, sizeof(event));
  1261. event.event = IW_CM_EVENT_ESTABLISHED;
  1262. event.ird = ep->ord;
  1263. event.ord = ep->ird;
  1264. if (ep->com.cm_id) {
  1265. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  1266. ep->com.cm_id->event_handler(ep->com.cm_id, &event);
  1267. set_bit(ESTAB_UPCALL, &ep->com.history);
  1268. }
  1269. }
  1270. static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
  1271. {
  1272. struct cpl_rx_data_ack *req;
  1273. struct sk_buff *skb;
  1274. int wrlen = roundup(sizeof *req, 16);
  1275. PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
  1276. skb = get_skb(NULL, wrlen, GFP_KERNEL);
  1277. if (!skb) {
  1278. printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
  1279. return 0;
  1280. }
  1281. /*
  1282. * If we couldn't specify the entire rcv window at connection setup
  1283. * due to the limit in the number of bits in the RCV_BUFSIZ field,
  1284. * then add the overage in to the credits returned.
  1285. */
  1286. if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
  1287. credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
  1288. req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
  1289. memset(req, 0, wrlen);
  1290. INIT_TP_WR(req, ep->hwtid);
  1291. OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
  1292. ep->hwtid));
  1293. req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK_F |
  1294. RX_DACK_CHANGE_F |
  1295. RX_DACK_MODE_V(dack_mode));
  1296. set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
  1297. c4iw_ofld_send(&ep->com.dev->rdev, skb);
  1298. return credits;
  1299. }
  1300. #define RELAXED_IRD_NEGOTIATION 1
  1301. /*
  1302. * process_mpa_reply - process streaming mode MPA reply
  1303. *
  1304. * Returns:
  1305. *
  1306. * 0 upon success indicating a connect request was delivered to the ULP
  1307. * or the mpa request is incomplete but valid so far.
  1308. *
  1309. * 1 if a failure requires the caller to close the connection.
  1310. *
  1311. * 2 if a failure requires the caller to abort the connection.
  1312. */
  1313. static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
  1314. {
  1315. struct mpa_message *mpa;
  1316. struct mpa_v2_conn_params *mpa_v2_params;
  1317. u16 plen;
  1318. u16 resp_ird, resp_ord;
  1319. u8 rtr_mismatch = 0, insuff_ird = 0;
  1320. struct c4iw_qp_attributes attrs;
  1321. enum c4iw_qp_attr_mask mask;
  1322. int err;
  1323. int disconnect = 0;
  1324. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  1325. /*
  1326. * If we get more than the supported amount of private data
  1327. * then we must fail this connection.
  1328. */
  1329. if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
  1330. err = -EINVAL;
  1331. goto err_stop_timer;
  1332. }
  1333. /*
  1334. * copy the new data into our accumulation buffer.
  1335. */
  1336. skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
  1337. skb->len);
  1338. ep->mpa_pkt_len += skb->len;
  1339. /*
  1340. * if we don't even have the mpa message, then bail.
  1341. */
  1342. if (ep->mpa_pkt_len < sizeof(*mpa))
  1343. return 0;
  1344. mpa = (struct mpa_message *) ep->mpa_pkt;
  1345. /* Validate MPA header. */
  1346. if (mpa->revision > mpa_rev) {
  1347. printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
  1348. " Received = %d\n", __func__, mpa_rev, mpa->revision);
  1349. err = -EPROTO;
  1350. goto err_stop_timer;
  1351. }
  1352. if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
  1353. err = -EPROTO;
  1354. goto err_stop_timer;
  1355. }
  1356. plen = ntohs(mpa->private_data_size);
  1357. /*
  1358. * Fail if there's too much private data.
  1359. */
  1360. if (plen > MPA_MAX_PRIVATE_DATA) {
  1361. err = -EPROTO;
  1362. goto err_stop_timer;
  1363. }
  1364. /*
  1365. * If plen does not account for pkt size
  1366. */
  1367. if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
  1368. err = -EPROTO;
  1369. goto err_stop_timer;
  1370. }
  1371. ep->plen = (u8) plen;
  1372. /*
  1373. * If we don't have all the pdata yet, then bail.
  1374. * We'll continue process when more data arrives.
  1375. */
  1376. if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
  1377. return 0;
  1378. if (mpa->flags & MPA_REJECT) {
  1379. err = -ECONNREFUSED;
  1380. goto err_stop_timer;
  1381. }
  1382. /*
  1383. * Stop mpa timer. If it expired, then
  1384. * we ignore the MPA reply. process_timeout()
  1385. * will abort the connection.
  1386. */
  1387. if (stop_ep_timer(ep))
  1388. return 0;
  1389. /*
  1390. * If we get here we have accumulated the entire mpa
  1391. * start reply message including private data. And
  1392. * the MPA header is valid.
  1393. */
  1394. __state_set(&ep->com, FPDU_MODE);
  1395. ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
  1396. ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
  1397. ep->mpa_attr.version = mpa->revision;
  1398. ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
  1399. if (mpa->revision == 2) {
  1400. ep->mpa_attr.enhanced_rdma_conn =
  1401. mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
  1402. if (ep->mpa_attr.enhanced_rdma_conn) {
  1403. mpa_v2_params = (struct mpa_v2_conn_params *)
  1404. (ep->mpa_pkt + sizeof(*mpa));
  1405. resp_ird = ntohs(mpa_v2_params->ird) &
  1406. MPA_V2_IRD_ORD_MASK;
  1407. resp_ord = ntohs(mpa_v2_params->ord) &
  1408. MPA_V2_IRD_ORD_MASK;
  1409. PDBG("%s responder ird %u ord %u ep ird %u ord %u\n",
  1410. __func__, resp_ird, resp_ord, ep->ird, ep->ord);
  1411. /*
  1412. * This is a double-check. Ideally, below checks are
  1413. * not required since ird/ord stuff has been taken
  1414. * care of in c4iw_accept_cr
  1415. */
  1416. if (ep->ird < resp_ord) {
  1417. if (RELAXED_IRD_NEGOTIATION && resp_ord <=
  1418. ep->com.dev->rdev.lldi.max_ordird_qp)
  1419. ep->ird = resp_ord;
  1420. else
  1421. insuff_ird = 1;
  1422. } else if (ep->ird > resp_ord) {
  1423. ep->ird = resp_ord;
  1424. }
  1425. if (ep->ord > resp_ird) {
  1426. if (RELAXED_IRD_NEGOTIATION)
  1427. ep->ord = resp_ird;
  1428. else
  1429. insuff_ird = 1;
  1430. }
  1431. if (insuff_ird) {
  1432. err = -ENOMEM;
  1433. ep->ird = resp_ord;
  1434. ep->ord = resp_ird;
  1435. }
  1436. if (ntohs(mpa_v2_params->ird) &
  1437. MPA_V2_PEER2PEER_MODEL) {
  1438. if (ntohs(mpa_v2_params->ord) &
  1439. MPA_V2_RDMA_WRITE_RTR)
  1440. ep->mpa_attr.p2p_type =
  1441. FW_RI_INIT_P2PTYPE_RDMA_WRITE;
  1442. else if (ntohs(mpa_v2_params->ord) &
  1443. MPA_V2_RDMA_READ_RTR)
  1444. ep->mpa_attr.p2p_type =
  1445. FW_RI_INIT_P2PTYPE_READ_REQ;
  1446. }
  1447. }
  1448. } else if (mpa->revision == 1)
  1449. if (peer2peer)
  1450. ep->mpa_attr.p2p_type = p2p_type;
  1451. PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
  1452. "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
  1453. "%d\n", __func__, ep->mpa_attr.crc_enabled,
  1454. ep->mpa_attr.recv_marker_enabled,
  1455. ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
  1456. ep->mpa_attr.p2p_type, p2p_type);
  1457. /*
  1458. * If responder's RTR does not match with that of initiator, assign
  1459. * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
  1460. * generated when moving QP to RTS state.
  1461. * A TERM message will be sent after QP has moved to RTS state
  1462. */
  1463. if ((ep->mpa_attr.version == 2) && peer2peer &&
  1464. (ep->mpa_attr.p2p_type != p2p_type)) {
  1465. ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
  1466. rtr_mismatch = 1;
  1467. }
  1468. attrs.mpa_attr = ep->mpa_attr;
  1469. attrs.max_ird = ep->ird;
  1470. attrs.max_ord = ep->ord;
  1471. attrs.llp_stream_handle = ep;
  1472. attrs.next_state = C4IW_QP_STATE_RTS;
  1473. mask = C4IW_QP_ATTR_NEXT_STATE |
  1474. C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
  1475. C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
  1476. /* bind QP and TID with INIT_WR */
  1477. err = c4iw_modify_qp(ep->com.qp->rhp,
  1478. ep->com.qp, mask, &attrs, 1);
  1479. if (err)
  1480. goto err;
  1481. /*
  1482. * If responder's RTR requirement did not match with what initiator
  1483. * supports, generate TERM message
  1484. */
  1485. if (rtr_mismatch) {
  1486. printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
  1487. attrs.layer_etype = LAYER_MPA | DDP_LLP;
  1488. attrs.ecode = MPA_NOMATCH_RTR;
  1489. attrs.next_state = C4IW_QP_STATE_TERMINATE;
  1490. attrs.send_term = 1;
  1491. err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
  1492. C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
  1493. err = -ENOMEM;
  1494. disconnect = 1;
  1495. goto out;
  1496. }
  1497. /*
  1498. * Generate TERM if initiator IRD is not sufficient for responder
  1499. * provided ORD. Currently, we do the same behaviour even when
  1500. * responder provided IRD is also not sufficient as regards to
  1501. * initiator ORD.
  1502. */
  1503. if (insuff_ird) {
  1504. printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
  1505. __func__);
  1506. attrs.layer_etype = LAYER_MPA | DDP_LLP;
  1507. attrs.ecode = MPA_INSUFF_IRD;
  1508. attrs.next_state = C4IW_QP_STATE_TERMINATE;
  1509. attrs.send_term = 1;
  1510. err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
  1511. C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
  1512. err = -ENOMEM;
  1513. disconnect = 1;
  1514. goto out;
  1515. }
  1516. goto out;
  1517. err_stop_timer:
  1518. stop_ep_timer(ep);
  1519. err:
  1520. disconnect = 2;
  1521. out:
  1522. connect_reply_upcall(ep, err);
  1523. return disconnect;
  1524. }
  1525. /*
  1526. * process_mpa_request - process streaming mode MPA request
  1527. *
  1528. * Returns:
  1529. *
  1530. * 0 upon success indicating a connect request was delivered to the ULP
  1531. * or the mpa request is incomplete but valid so far.
  1532. *
  1533. * 1 if a failure requires the caller to close the connection.
  1534. *
  1535. * 2 if a failure requires the caller to abort the connection.
  1536. */
  1537. static int process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
  1538. {
  1539. struct mpa_message *mpa;
  1540. struct mpa_v2_conn_params *mpa_v2_params;
  1541. u16 plen;
  1542. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  1543. /*
  1544. * If we get more than the supported amount of private data
  1545. * then we must fail this connection.
  1546. */
  1547. if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt))
  1548. goto err_stop_timer;
  1549. PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
  1550. /*
  1551. * Copy the new data into our accumulation buffer.
  1552. */
  1553. skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
  1554. skb->len);
  1555. ep->mpa_pkt_len += skb->len;
  1556. /*
  1557. * If we don't even have the mpa message, then bail.
  1558. * We'll continue process when more data arrives.
  1559. */
  1560. if (ep->mpa_pkt_len < sizeof(*mpa))
  1561. return 0;
  1562. PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
  1563. mpa = (struct mpa_message *) ep->mpa_pkt;
  1564. /*
  1565. * Validate MPA Header.
  1566. */
  1567. if (mpa->revision > mpa_rev) {
  1568. printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
  1569. " Received = %d\n", __func__, mpa_rev, mpa->revision);
  1570. goto err_stop_timer;
  1571. }
  1572. if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)))
  1573. goto err_stop_timer;
  1574. plen = ntohs(mpa->private_data_size);
  1575. /*
  1576. * Fail if there's too much private data.
  1577. */
  1578. if (plen > MPA_MAX_PRIVATE_DATA)
  1579. goto err_stop_timer;
  1580. /*
  1581. * If plen does not account for pkt size
  1582. */
  1583. if (ep->mpa_pkt_len > (sizeof(*mpa) + plen))
  1584. goto err_stop_timer;
  1585. ep->plen = (u8) plen;
  1586. /*
  1587. * If we don't have all the pdata yet, then bail.
  1588. */
  1589. if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
  1590. return 0;
  1591. /*
  1592. * If we get here we have accumulated the entire mpa
  1593. * start reply message including private data.
  1594. */
  1595. ep->mpa_attr.initiator = 0;
  1596. ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
  1597. ep->mpa_attr.recv_marker_enabled = markers_enabled;
  1598. ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
  1599. ep->mpa_attr.version = mpa->revision;
  1600. if (mpa->revision == 1)
  1601. ep->tried_with_mpa_v1 = 1;
  1602. ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
  1603. if (mpa->revision == 2) {
  1604. ep->mpa_attr.enhanced_rdma_conn =
  1605. mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
  1606. if (ep->mpa_attr.enhanced_rdma_conn) {
  1607. mpa_v2_params = (struct mpa_v2_conn_params *)
  1608. (ep->mpa_pkt + sizeof(*mpa));
  1609. ep->ird = ntohs(mpa_v2_params->ird) &
  1610. MPA_V2_IRD_ORD_MASK;
  1611. ep->ird = min_t(u32, ep->ird,
  1612. cur_max_read_depth(ep->com.dev));
  1613. ep->ord = ntohs(mpa_v2_params->ord) &
  1614. MPA_V2_IRD_ORD_MASK;
  1615. ep->ord = min_t(u32, ep->ord,
  1616. cur_max_read_depth(ep->com.dev));
  1617. PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
  1618. ep->ord);
  1619. if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
  1620. if (peer2peer) {
  1621. if (ntohs(mpa_v2_params->ord) &
  1622. MPA_V2_RDMA_WRITE_RTR)
  1623. ep->mpa_attr.p2p_type =
  1624. FW_RI_INIT_P2PTYPE_RDMA_WRITE;
  1625. else if (ntohs(mpa_v2_params->ord) &
  1626. MPA_V2_RDMA_READ_RTR)
  1627. ep->mpa_attr.p2p_type =
  1628. FW_RI_INIT_P2PTYPE_READ_REQ;
  1629. }
  1630. }
  1631. } else if (mpa->revision == 1)
  1632. if (peer2peer)
  1633. ep->mpa_attr.p2p_type = p2p_type;
  1634. PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
  1635. "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
  1636. ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
  1637. ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
  1638. ep->mpa_attr.p2p_type);
  1639. __state_set(&ep->com, MPA_REQ_RCVD);
  1640. /* drive upcall */
  1641. mutex_lock_nested(&ep->parent_ep->com.mutex, SINGLE_DEPTH_NESTING);
  1642. if (ep->parent_ep->com.state != DEAD) {
  1643. if (connect_request_upcall(ep))
  1644. goto err_unlock_parent;
  1645. } else {
  1646. goto err_unlock_parent;
  1647. }
  1648. mutex_unlock(&ep->parent_ep->com.mutex);
  1649. return 0;
  1650. err_unlock_parent:
  1651. mutex_unlock(&ep->parent_ep->com.mutex);
  1652. goto err_out;
  1653. err_stop_timer:
  1654. (void)stop_ep_timer(ep);
  1655. err_out:
  1656. return 2;
  1657. }
  1658. static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
  1659. {
  1660. struct c4iw_ep *ep;
  1661. struct cpl_rx_data *hdr = cplhdr(skb);
  1662. unsigned int dlen = ntohs(hdr->len);
  1663. unsigned int tid = GET_TID(hdr);
  1664. __u8 status = hdr->status;
  1665. int disconnect = 0;
  1666. ep = get_ep_from_tid(dev, tid);
  1667. if (!ep)
  1668. return 0;
  1669. PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
  1670. skb_pull(skb, sizeof(*hdr));
  1671. skb_trim(skb, dlen);
  1672. mutex_lock(&ep->com.mutex);
  1673. /* update RX credits */
  1674. update_rx_credits(ep, dlen);
  1675. switch (ep->com.state) {
  1676. case MPA_REQ_SENT:
  1677. ep->rcv_seq += dlen;
  1678. disconnect = process_mpa_reply(ep, skb);
  1679. break;
  1680. case MPA_REQ_WAIT:
  1681. ep->rcv_seq += dlen;
  1682. disconnect = process_mpa_request(ep, skb);
  1683. break;
  1684. case FPDU_MODE: {
  1685. struct c4iw_qp_attributes attrs;
  1686. BUG_ON(!ep->com.qp);
  1687. if (status)
  1688. pr_err("%s Unexpected streaming data." \
  1689. " qpid %u ep %p state %d tid %u status %d\n",
  1690. __func__, ep->com.qp->wq.sq.qid, ep,
  1691. ep->com.state, ep->hwtid, status);
  1692. attrs.next_state = C4IW_QP_STATE_TERMINATE;
  1693. c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
  1694. C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
  1695. disconnect = 1;
  1696. break;
  1697. }
  1698. default:
  1699. break;
  1700. }
  1701. mutex_unlock(&ep->com.mutex);
  1702. if (disconnect)
  1703. c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL);
  1704. c4iw_put_ep(&ep->com);
  1705. return 0;
  1706. }
  1707. static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
  1708. {
  1709. struct c4iw_ep *ep;
  1710. struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
  1711. int release = 0;
  1712. unsigned int tid = GET_TID(rpl);
  1713. ep = get_ep_from_tid(dev, tid);
  1714. if (!ep) {
  1715. printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
  1716. return 0;
  1717. }
  1718. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  1719. mutex_lock(&ep->com.mutex);
  1720. switch (ep->com.state) {
  1721. case ABORTING:
  1722. c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
  1723. __state_set(&ep->com, DEAD);
  1724. release = 1;
  1725. break;
  1726. default:
  1727. printk(KERN_ERR "%s ep %p state %d\n",
  1728. __func__, ep, ep->com.state);
  1729. break;
  1730. }
  1731. mutex_unlock(&ep->com.mutex);
  1732. if (release)
  1733. release_ep_resources(ep);
  1734. c4iw_put_ep(&ep->com);
  1735. return 0;
  1736. }
  1737. static int send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
  1738. {
  1739. struct sk_buff *skb;
  1740. struct fw_ofld_connection_wr *req;
  1741. unsigned int mtu_idx;
  1742. int wscale;
  1743. struct sockaddr_in *sin;
  1744. int win;
  1745. skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
  1746. req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
  1747. memset(req, 0, sizeof(*req));
  1748. req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
  1749. req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
  1750. req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
  1751. ep->com.dev->rdev.lldi.ports[0],
  1752. ep->l2t));
  1753. sin = (struct sockaddr_in *)&ep->com.local_addr;
  1754. req->le.lport = sin->sin_port;
  1755. req->le.u.ipv4.lip = sin->sin_addr.s_addr;
  1756. sin = (struct sockaddr_in *)&ep->com.remote_addr;
  1757. req->le.pport = sin->sin_port;
  1758. req->le.u.ipv4.pip = sin->sin_addr.s_addr;
  1759. req->tcb.t_state_to_astid =
  1760. htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
  1761. FW_OFLD_CONNECTION_WR_ASTID_V(atid));
  1762. req->tcb.cplrxdataack_cplpassacceptrpl =
  1763. htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
  1764. req->tcb.tx_max = (__force __be32) jiffies;
  1765. req->tcb.rcv_adv = htons(1);
  1766. best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
  1767. enable_tcp_timestamps,
  1768. (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
  1769. wscale = compute_wscale(rcv_win);
  1770. /*
  1771. * Specify the largest window that will fit in opt0. The
  1772. * remainder will be specified in the rx_data_ack.
  1773. */
  1774. win = ep->rcv_win >> 10;
  1775. if (win > RCV_BUFSIZ_M)
  1776. win = RCV_BUFSIZ_M;
  1777. req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
  1778. (nocong ? NO_CONG_F : 0) |
  1779. KEEP_ALIVE_F |
  1780. DELACK_F |
  1781. WND_SCALE_V(wscale) |
  1782. MSS_IDX_V(mtu_idx) |
  1783. L2T_IDX_V(ep->l2t->idx) |
  1784. TX_CHAN_V(ep->tx_chan) |
  1785. SMAC_SEL_V(ep->smac_idx) |
  1786. DSCP_V(ep->tos >> 2) |
  1787. ULP_MODE_V(ULP_MODE_TCPDDP) |
  1788. RCV_BUFSIZ_V(win));
  1789. req->tcb.opt2 = (__force __be32) (PACE_V(1) |
  1790. TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
  1791. RX_CHANNEL_V(0) |
  1792. CCTRL_ECN_V(enable_ecn) |
  1793. RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
  1794. if (enable_tcp_timestamps)
  1795. req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
  1796. if (enable_tcp_sack)
  1797. req->tcb.opt2 |= (__force __be32)SACK_EN_F;
  1798. if (wscale && enable_tcp_window_scaling)
  1799. req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
  1800. req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
  1801. req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
  1802. set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
  1803. set_bit(ACT_OFLD_CONN, &ep->com.history);
  1804. return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
  1805. }
  1806. /*
  1807. * Some of the error codes above implicitly indicate that there is no TID
  1808. * allocated with the result of an ACT_OPEN. We use this predicate to make
  1809. * that explicit.
  1810. */
  1811. static inline int act_open_has_tid(int status)
  1812. {
  1813. return (status != CPL_ERR_TCAM_PARITY &&
  1814. status != CPL_ERR_TCAM_MISS &&
  1815. status != CPL_ERR_TCAM_FULL &&
  1816. status != CPL_ERR_CONN_EXIST_SYNRECV &&
  1817. status != CPL_ERR_CONN_EXIST);
  1818. }
  1819. /* Returns whether a CPL status conveys negative advice.
  1820. */
  1821. static int is_neg_adv(unsigned int status)
  1822. {
  1823. return status == CPL_ERR_RTX_NEG_ADVICE ||
  1824. status == CPL_ERR_PERSIST_NEG_ADVICE ||
  1825. status == CPL_ERR_KEEPALV_NEG_ADVICE;
  1826. }
  1827. static char *neg_adv_str(unsigned int status)
  1828. {
  1829. switch (status) {
  1830. case CPL_ERR_RTX_NEG_ADVICE:
  1831. return "Retransmit timeout";
  1832. case CPL_ERR_PERSIST_NEG_ADVICE:
  1833. return "Persist timeout";
  1834. case CPL_ERR_KEEPALV_NEG_ADVICE:
  1835. return "Keepalive timeout";
  1836. default:
  1837. return "Unknown";
  1838. }
  1839. }
  1840. static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
  1841. {
  1842. ep->snd_win = snd_win;
  1843. ep->rcv_win = rcv_win;
  1844. PDBG("%s snd_win %d rcv_win %d\n", __func__, ep->snd_win, ep->rcv_win);
  1845. }
  1846. #define ACT_OPEN_RETRY_COUNT 2
  1847. static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
  1848. struct dst_entry *dst, struct c4iw_dev *cdev,
  1849. bool clear_mpa_v1, enum chip_type adapter_type, u8 tos)
  1850. {
  1851. struct neighbour *n;
  1852. int err, step;
  1853. struct net_device *pdev;
  1854. n = dst_neigh_lookup(dst, peer_ip);
  1855. if (!n)
  1856. return -ENODEV;
  1857. rcu_read_lock();
  1858. err = -ENOMEM;
  1859. if (n->dev->flags & IFF_LOOPBACK) {
  1860. if (iptype == 4)
  1861. pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
  1862. else if (IS_ENABLED(CONFIG_IPV6))
  1863. for_each_netdev(&init_net, pdev) {
  1864. if (ipv6_chk_addr(&init_net,
  1865. (struct in6_addr *)peer_ip,
  1866. pdev, 1))
  1867. break;
  1868. }
  1869. else
  1870. pdev = NULL;
  1871. if (!pdev) {
  1872. err = -ENODEV;
  1873. goto out;
  1874. }
  1875. ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
  1876. n, pdev, rt_tos2priority(tos));
  1877. if (!ep->l2t)
  1878. goto out;
  1879. ep->mtu = pdev->mtu;
  1880. ep->tx_chan = cxgb4_port_chan(pdev);
  1881. ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
  1882. cxgb4_port_viid(pdev));
  1883. step = cdev->rdev.lldi.ntxq /
  1884. cdev->rdev.lldi.nchan;
  1885. ep->txq_idx = cxgb4_port_idx(pdev) * step;
  1886. step = cdev->rdev.lldi.nrxq /
  1887. cdev->rdev.lldi.nchan;
  1888. ep->ctrlq_idx = cxgb4_port_idx(pdev);
  1889. ep->rss_qid = cdev->rdev.lldi.rxq_ids[
  1890. cxgb4_port_idx(pdev) * step];
  1891. set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
  1892. dev_put(pdev);
  1893. } else {
  1894. pdev = get_real_dev(n->dev);
  1895. ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
  1896. n, pdev, 0);
  1897. if (!ep->l2t)
  1898. goto out;
  1899. ep->mtu = dst_mtu(dst);
  1900. ep->tx_chan = cxgb4_port_chan(pdev);
  1901. ep->smac_idx = cxgb4_tp_smt_idx(adapter_type,
  1902. cxgb4_port_viid(pdev));
  1903. step = cdev->rdev.lldi.ntxq /
  1904. cdev->rdev.lldi.nchan;
  1905. ep->txq_idx = cxgb4_port_idx(pdev) * step;
  1906. ep->ctrlq_idx = cxgb4_port_idx(pdev);
  1907. step = cdev->rdev.lldi.nrxq /
  1908. cdev->rdev.lldi.nchan;
  1909. ep->rss_qid = cdev->rdev.lldi.rxq_ids[
  1910. cxgb4_port_idx(pdev) * step];
  1911. set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
  1912. if (clear_mpa_v1) {
  1913. ep->retry_with_mpa_v1 = 0;
  1914. ep->tried_with_mpa_v1 = 0;
  1915. }
  1916. }
  1917. err = 0;
  1918. out:
  1919. rcu_read_unlock();
  1920. neigh_release(n);
  1921. return err;
  1922. }
  1923. static int c4iw_reconnect(struct c4iw_ep *ep)
  1924. {
  1925. int err = 0;
  1926. int size = 0;
  1927. struct sockaddr_in *laddr = (struct sockaddr_in *)
  1928. &ep->com.cm_id->m_local_addr;
  1929. struct sockaddr_in *raddr = (struct sockaddr_in *)
  1930. &ep->com.cm_id->m_remote_addr;
  1931. struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
  1932. &ep->com.cm_id->m_local_addr;
  1933. struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
  1934. &ep->com.cm_id->m_remote_addr;
  1935. int iptype;
  1936. __u8 *ra;
  1937. PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
  1938. init_timer(&ep->timer);
  1939. c4iw_init_wr_wait(&ep->com.wr_wait);
  1940. /* When MPA revision is different on nodes, the node with MPA_rev=2
  1941. * tries to reconnect with MPA_rev 1 for the same EP through
  1942. * c4iw_reconnect(), where the same EP is assigned with new tid for
  1943. * further connection establishment. As we are using the same EP pointer
  1944. * for reconnect, few skbs are used during the previous c4iw_connect(),
  1945. * which leaves the EP with inadequate skbs for further
  1946. * c4iw_reconnect(), Further causing an assert BUG_ON() due to empty
  1947. * skb_list() during peer_abort(). Allocate skbs which is already used.
  1948. */
  1949. size = (CN_MAX_CON_BUF - skb_queue_len(&ep->com.ep_skb_list));
  1950. if (alloc_ep_skb_list(&ep->com.ep_skb_list, size)) {
  1951. err = -ENOMEM;
  1952. goto fail1;
  1953. }
  1954. /*
  1955. * Allocate an active TID to initiate a TCP connection.
  1956. */
  1957. ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
  1958. if (ep->atid == -1) {
  1959. pr_err("%s - cannot alloc atid.\n", __func__);
  1960. err = -ENOMEM;
  1961. goto fail2;
  1962. }
  1963. insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
  1964. /* find a route */
  1965. if (ep->com.cm_id->m_local_addr.ss_family == AF_INET) {
  1966. ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
  1967. raddr->sin_addr.s_addr, laddr->sin_port,
  1968. raddr->sin_port, ep->com.cm_id->tos);
  1969. iptype = 4;
  1970. ra = (__u8 *)&raddr->sin_addr;
  1971. } else {
  1972. ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
  1973. raddr6->sin6_addr.s6_addr,
  1974. laddr6->sin6_port, raddr6->sin6_port, 0,
  1975. raddr6->sin6_scope_id);
  1976. iptype = 6;
  1977. ra = (__u8 *)&raddr6->sin6_addr;
  1978. }
  1979. if (!ep->dst) {
  1980. pr_err("%s - cannot find route.\n", __func__);
  1981. err = -EHOSTUNREACH;
  1982. goto fail3;
  1983. }
  1984. err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false,
  1985. ep->com.dev->rdev.lldi.adapter_type,
  1986. ep->com.cm_id->tos);
  1987. if (err) {
  1988. pr_err("%s - cannot alloc l2e.\n", __func__);
  1989. goto fail4;
  1990. }
  1991. PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
  1992. __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
  1993. ep->l2t->idx);
  1994. state_set(&ep->com, CONNECTING);
  1995. ep->tos = ep->com.cm_id->tos;
  1996. /* send connect request to rnic */
  1997. err = send_connect(ep);
  1998. if (!err)
  1999. goto out;
  2000. cxgb4_l2t_release(ep->l2t);
  2001. fail4:
  2002. dst_release(ep->dst);
  2003. fail3:
  2004. remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
  2005. cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
  2006. fail2:
  2007. /*
  2008. * remember to send notification to upper layer.
  2009. * We are in here so the upper layer is not aware that this is
  2010. * re-connect attempt and so, upper layer is still waiting for
  2011. * response of 1st connect request.
  2012. */
  2013. connect_reply_upcall(ep, -ECONNRESET);
  2014. fail1:
  2015. c4iw_put_ep(&ep->com);
  2016. out:
  2017. return err;
  2018. }
  2019. static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
  2020. {
  2021. struct c4iw_ep *ep;
  2022. struct cpl_act_open_rpl *rpl = cplhdr(skb);
  2023. unsigned int atid = TID_TID_G(AOPEN_ATID_G(
  2024. ntohl(rpl->atid_status)));
  2025. struct tid_info *t = dev->rdev.lldi.tids;
  2026. int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
  2027. struct sockaddr_in *la;
  2028. struct sockaddr_in *ra;
  2029. struct sockaddr_in6 *la6;
  2030. struct sockaddr_in6 *ra6;
  2031. int ret = 0;
  2032. ep = lookup_atid(t, atid);
  2033. la = (struct sockaddr_in *)&ep->com.local_addr;
  2034. ra = (struct sockaddr_in *)&ep->com.remote_addr;
  2035. la6 = (struct sockaddr_in6 *)&ep->com.local_addr;
  2036. ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr;
  2037. PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
  2038. status, status2errno(status));
  2039. if (is_neg_adv(status)) {
  2040. PDBG("%s Connection problems for atid %u status %u (%s)\n",
  2041. __func__, atid, status, neg_adv_str(status));
  2042. ep->stats.connect_neg_adv++;
  2043. mutex_lock(&dev->rdev.stats.lock);
  2044. dev->rdev.stats.neg_adv++;
  2045. mutex_unlock(&dev->rdev.stats.lock);
  2046. return 0;
  2047. }
  2048. set_bit(ACT_OPEN_RPL, &ep->com.history);
  2049. /*
  2050. * Log interesting failures.
  2051. */
  2052. switch (status) {
  2053. case CPL_ERR_CONN_RESET:
  2054. case CPL_ERR_CONN_TIMEDOUT:
  2055. break;
  2056. case CPL_ERR_TCAM_FULL:
  2057. mutex_lock(&dev->rdev.stats.lock);
  2058. dev->rdev.stats.tcam_full++;
  2059. mutex_unlock(&dev->rdev.stats.lock);
  2060. if (ep->com.local_addr.ss_family == AF_INET &&
  2061. dev->rdev.lldi.enable_fw_ofld_conn) {
  2062. ret = send_fw_act_open_req(ep, TID_TID_G(AOPEN_ATID_G(
  2063. ntohl(rpl->atid_status))));
  2064. if (ret)
  2065. goto fail;
  2066. return 0;
  2067. }
  2068. break;
  2069. case CPL_ERR_CONN_EXIST:
  2070. if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
  2071. set_bit(ACT_RETRY_INUSE, &ep->com.history);
  2072. if (ep->com.remote_addr.ss_family == AF_INET6) {
  2073. struct sockaddr_in6 *sin6 =
  2074. (struct sockaddr_in6 *)
  2075. &ep->com.local_addr;
  2076. cxgb4_clip_release(
  2077. ep->com.dev->rdev.lldi.ports[0],
  2078. (const u32 *)
  2079. &sin6->sin6_addr.s6_addr, 1);
  2080. }
  2081. remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
  2082. atid);
  2083. cxgb4_free_atid(t, atid);
  2084. dst_release(ep->dst);
  2085. cxgb4_l2t_release(ep->l2t);
  2086. c4iw_reconnect(ep);
  2087. return 0;
  2088. }
  2089. break;
  2090. default:
  2091. if (ep->com.local_addr.ss_family == AF_INET) {
  2092. pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
  2093. atid, status, status2errno(status),
  2094. &la->sin_addr.s_addr, ntohs(la->sin_port),
  2095. &ra->sin_addr.s_addr, ntohs(ra->sin_port));
  2096. } else {
  2097. pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
  2098. atid, status, status2errno(status),
  2099. la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
  2100. ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
  2101. }
  2102. break;
  2103. }
  2104. fail:
  2105. connect_reply_upcall(ep, status2errno(status));
  2106. state_set(&ep->com, DEAD);
  2107. if (ep->com.remote_addr.ss_family == AF_INET6) {
  2108. struct sockaddr_in6 *sin6 =
  2109. (struct sockaddr_in6 *)&ep->com.local_addr;
  2110. cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
  2111. (const u32 *)&sin6->sin6_addr.s6_addr, 1);
  2112. }
  2113. if (status && act_open_has_tid(status))
  2114. cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
  2115. remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
  2116. cxgb4_free_atid(t, atid);
  2117. dst_release(ep->dst);
  2118. cxgb4_l2t_release(ep->l2t);
  2119. c4iw_put_ep(&ep->com);
  2120. return 0;
  2121. }
  2122. static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
  2123. {
  2124. struct cpl_pass_open_rpl *rpl = cplhdr(skb);
  2125. unsigned int stid = GET_TID(rpl);
  2126. struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
  2127. if (!ep) {
  2128. PDBG("%s stid %d lookup failure!\n", __func__, stid);
  2129. goto out;
  2130. }
  2131. PDBG("%s ep %p status %d error %d\n", __func__, ep,
  2132. rpl->status, status2errno(rpl->status));
  2133. c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
  2134. c4iw_put_ep(&ep->com);
  2135. out:
  2136. return 0;
  2137. }
  2138. static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
  2139. {
  2140. struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
  2141. unsigned int stid = GET_TID(rpl);
  2142. struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid);
  2143. PDBG("%s ep %p\n", __func__, ep);
  2144. c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
  2145. c4iw_put_ep(&ep->com);
  2146. return 0;
  2147. }
  2148. static int accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
  2149. struct cpl_pass_accept_req *req)
  2150. {
  2151. struct cpl_pass_accept_rpl *rpl;
  2152. unsigned int mtu_idx;
  2153. u64 opt0;
  2154. u32 opt2;
  2155. int wscale;
  2156. struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
  2157. int win;
  2158. enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type;
  2159. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  2160. BUG_ON(skb_cloned(skb));
  2161. skb_get(skb);
  2162. rpl = cplhdr(skb);
  2163. if (!is_t4(adapter_type)) {
  2164. skb_trim(skb, roundup(sizeof(*rpl5), 16));
  2165. rpl5 = (void *)rpl;
  2166. INIT_TP_WR(rpl5, ep->hwtid);
  2167. } else {
  2168. skb_trim(skb, sizeof(*rpl));
  2169. INIT_TP_WR(rpl, ep->hwtid);
  2170. }
  2171. OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
  2172. ep->hwtid));
  2173. best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
  2174. enable_tcp_timestamps && req->tcpopt.tstamp,
  2175. (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
  2176. wscale = compute_wscale(rcv_win);
  2177. /*
  2178. * Specify the largest window that will fit in opt0. The
  2179. * remainder will be specified in the rx_data_ack.
  2180. */
  2181. win = ep->rcv_win >> 10;
  2182. if (win > RCV_BUFSIZ_M)
  2183. win = RCV_BUFSIZ_M;
  2184. opt0 = (nocong ? NO_CONG_F : 0) |
  2185. KEEP_ALIVE_F |
  2186. DELACK_F |
  2187. WND_SCALE_V(wscale) |
  2188. MSS_IDX_V(mtu_idx) |
  2189. L2T_IDX_V(ep->l2t->idx) |
  2190. TX_CHAN_V(ep->tx_chan) |
  2191. SMAC_SEL_V(ep->smac_idx) |
  2192. DSCP_V(ep->tos >> 2) |
  2193. ULP_MODE_V(ULP_MODE_TCPDDP) |
  2194. RCV_BUFSIZ_V(win);
  2195. opt2 = RX_CHANNEL_V(0) |
  2196. RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
  2197. if (enable_tcp_timestamps && req->tcpopt.tstamp)
  2198. opt2 |= TSTAMPS_EN_F;
  2199. if (enable_tcp_sack && req->tcpopt.sack)
  2200. opt2 |= SACK_EN_F;
  2201. if (wscale && enable_tcp_window_scaling)
  2202. opt2 |= WND_SCALE_EN_F;
  2203. if (enable_ecn) {
  2204. const struct tcphdr *tcph;
  2205. u32 hlen = ntohl(req->hdr_len);
  2206. if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5)
  2207. tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
  2208. IP_HDR_LEN_G(hlen);
  2209. else
  2210. tcph = (const void *)(req + 1) +
  2211. T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen);
  2212. if (tcph->ece && tcph->cwr)
  2213. opt2 |= CCTRL_ECN_V(1);
  2214. }
  2215. if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) {
  2216. u32 isn = (prandom_u32() & ~7UL) - 1;
  2217. opt2 |= T5_OPT_2_VALID_F;
  2218. opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
  2219. opt2 |= T5_ISS_F;
  2220. rpl5 = (void *)rpl;
  2221. memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16));
  2222. if (peer2peer)
  2223. isn += 4;
  2224. rpl5->iss = cpu_to_be32(isn);
  2225. PDBG("%s iss %u\n", __func__, be32_to_cpu(rpl5->iss));
  2226. }
  2227. rpl->opt0 = cpu_to_be64(opt0);
  2228. rpl->opt2 = cpu_to_be32(opt2);
  2229. set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
  2230. t4_set_arp_err_handler(skb, ep, pass_accept_rpl_arp_failure);
  2231. return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
  2232. }
  2233. static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
  2234. {
  2235. PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
  2236. BUG_ON(skb_cloned(skb));
  2237. skb_trim(skb, sizeof(struct cpl_tid_release));
  2238. release_tid(&dev->rdev, hwtid, skb);
  2239. return;
  2240. }
  2241. static void get_4tuple(struct cpl_pass_accept_req *req, enum chip_type type,
  2242. int *iptype, __u8 *local_ip, __u8 *peer_ip,
  2243. __be16 *local_port, __be16 *peer_port)
  2244. {
  2245. int eth_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ?
  2246. ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len)) :
  2247. T6_ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len));
  2248. int ip_len = (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) ?
  2249. IP_HDR_LEN_G(be32_to_cpu(req->hdr_len)) :
  2250. T6_IP_HDR_LEN_G(be32_to_cpu(req->hdr_len));
  2251. struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
  2252. struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
  2253. struct tcphdr *tcp = (struct tcphdr *)
  2254. ((u8 *)(req + 1) + eth_len + ip_len);
  2255. if (ip->version == 4) {
  2256. PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
  2257. ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
  2258. ntohs(tcp->dest));
  2259. *iptype = 4;
  2260. memcpy(peer_ip, &ip->saddr, 4);
  2261. memcpy(local_ip, &ip->daddr, 4);
  2262. } else {
  2263. PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
  2264. ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
  2265. ntohs(tcp->dest));
  2266. *iptype = 6;
  2267. memcpy(peer_ip, ip6->saddr.s6_addr, 16);
  2268. memcpy(local_ip, ip6->daddr.s6_addr, 16);
  2269. }
  2270. *peer_port = tcp->source;
  2271. *local_port = tcp->dest;
  2272. return;
  2273. }
  2274. static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
  2275. {
  2276. struct c4iw_ep *child_ep = NULL, *parent_ep;
  2277. struct cpl_pass_accept_req *req = cplhdr(skb);
  2278. unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
  2279. struct tid_info *t = dev->rdev.lldi.tids;
  2280. unsigned int hwtid = GET_TID(req);
  2281. struct dst_entry *dst;
  2282. __u8 local_ip[16], peer_ip[16];
  2283. __be16 local_port, peer_port;
  2284. struct sockaddr_in6 *sin6;
  2285. int err;
  2286. u16 peer_mss = ntohs(req->tcpopt.mss);
  2287. int iptype;
  2288. unsigned short hdrs;
  2289. u8 tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
  2290. parent_ep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
  2291. if (!parent_ep) {
  2292. PDBG("%s connect request on invalid stid %d\n", __func__, stid);
  2293. goto reject;
  2294. }
  2295. if (state_read(&parent_ep->com) != LISTEN) {
  2296. PDBG("%s - listening ep not in LISTEN\n", __func__);
  2297. goto reject;
  2298. }
  2299. get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type, &iptype,
  2300. local_ip, peer_ip, &local_port, &peer_port);
  2301. /* Find output route */
  2302. if (iptype == 4) {
  2303. PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
  2304. , __func__, parent_ep, hwtid,
  2305. local_ip, peer_ip, ntohs(local_port),
  2306. ntohs(peer_port), peer_mss);
  2307. dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
  2308. local_port, peer_port,
  2309. tos);
  2310. } else {
  2311. PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
  2312. , __func__, parent_ep, hwtid,
  2313. local_ip, peer_ip, ntohs(local_port),
  2314. ntohs(peer_port), peer_mss);
  2315. dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
  2316. PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
  2317. ((struct sockaddr_in6 *)
  2318. &parent_ep->com.local_addr)->sin6_scope_id);
  2319. }
  2320. if (!dst) {
  2321. printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
  2322. __func__);
  2323. goto reject;
  2324. }
  2325. child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
  2326. if (!child_ep) {
  2327. printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
  2328. __func__);
  2329. dst_release(dst);
  2330. goto reject;
  2331. }
  2332. err = import_ep(child_ep, iptype, peer_ip, dst, dev, false,
  2333. parent_ep->com.dev->rdev.lldi.adapter_type, tos);
  2334. if (err) {
  2335. printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
  2336. __func__);
  2337. dst_release(dst);
  2338. kfree(child_ep);
  2339. goto reject;
  2340. }
  2341. hdrs = sizeof(struct iphdr) + sizeof(struct tcphdr) +
  2342. ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
  2343. if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
  2344. child_ep->mtu = peer_mss + hdrs;
  2345. skb_queue_head_init(&child_ep->com.ep_skb_list);
  2346. if (alloc_ep_skb_list(&child_ep->com.ep_skb_list, CN_MAX_CON_BUF))
  2347. goto fail;
  2348. state_set(&child_ep->com, CONNECTING);
  2349. child_ep->com.dev = dev;
  2350. child_ep->com.cm_id = NULL;
  2351. if (iptype == 4) {
  2352. struct sockaddr_in *sin = (struct sockaddr_in *)
  2353. &child_ep->com.local_addr;
  2354. sin->sin_family = PF_INET;
  2355. sin->sin_port = local_port;
  2356. sin->sin_addr.s_addr = *(__be32 *)local_ip;
  2357. sin = (struct sockaddr_in *)&child_ep->com.local_addr;
  2358. sin->sin_family = PF_INET;
  2359. sin->sin_port = ((struct sockaddr_in *)
  2360. &parent_ep->com.local_addr)->sin_port;
  2361. sin->sin_addr.s_addr = *(__be32 *)local_ip;
  2362. sin = (struct sockaddr_in *)&child_ep->com.remote_addr;
  2363. sin->sin_family = PF_INET;
  2364. sin->sin_port = peer_port;
  2365. sin->sin_addr.s_addr = *(__be32 *)peer_ip;
  2366. } else {
  2367. sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
  2368. sin6->sin6_family = PF_INET6;
  2369. sin6->sin6_port = local_port;
  2370. memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
  2371. sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
  2372. sin6->sin6_family = PF_INET6;
  2373. sin6->sin6_port = ((struct sockaddr_in6 *)
  2374. &parent_ep->com.local_addr)->sin6_port;
  2375. memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
  2376. sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr;
  2377. sin6->sin6_family = PF_INET6;
  2378. sin6->sin6_port = peer_port;
  2379. memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
  2380. }
  2381. c4iw_get_ep(&parent_ep->com);
  2382. child_ep->parent_ep = parent_ep;
  2383. child_ep->tos = tos;
  2384. child_ep->dst = dst;
  2385. child_ep->hwtid = hwtid;
  2386. PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
  2387. child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
  2388. init_timer(&child_ep->timer);
  2389. cxgb4_insert_tid(t, child_ep, hwtid);
  2390. insert_ep_tid(child_ep);
  2391. if (accept_cr(child_ep, skb, req)) {
  2392. c4iw_put_ep(&parent_ep->com);
  2393. release_ep_resources(child_ep);
  2394. } else {
  2395. set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
  2396. }
  2397. if (iptype == 6) {
  2398. sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
  2399. cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0],
  2400. (const u32 *)&sin6->sin6_addr.s6_addr, 1);
  2401. }
  2402. goto out;
  2403. fail:
  2404. c4iw_put_ep(&child_ep->com);
  2405. reject:
  2406. reject_cr(dev, hwtid, skb);
  2407. if (parent_ep)
  2408. c4iw_put_ep(&parent_ep->com);
  2409. out:
  2410. return 0;
  2411. }
  2412. static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
  2413. {
  2414. struct c4iw_ep *ep;
  2415. struct cpl_pass_establish *req = cplhdr(skb);
  2416. unsigned int tid = GET_TID(req);
  2417. int ret;
  2418. ep = get_ep_from_tid(dev, tid);
  2419. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  2420. ep->snd_seq = be32_to_cpu(req->snd_isn);
  2421. ep->rcv_seq = be32_to_cpu(req->rcv_isn);
  2422. PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
  2423. ntohs(req->tcp_opt));
  2424. set_emss(ep, ntohs(req->tcp_opt));
  2425. dst_confirm(ep->dst);
  2426. mutex_lock(&ep->com.mutex);
  2427. ep->com.state = MPA_REQ_WAIT;
  2428. start_ep_timer(ep);
  2429. set_bit(PASS_ESTAB, &ep->com.history);
  2430. ret = send_flowc(ep);
  2431. mutex_unlock(&ep->com.mutex);
  2432. if (ret)
  2433. c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
  2434. c4iw_put_ep(&ep->com);
  2435. return 0;
  2436. }
  2437. static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
  2438. {
  2439. struct cpl_peer_close *hdr = cplhdr(skb);
  2440. struct c4iw_ep *ep;
  2441. struct c4iw_qp_attributes attrs;
  2442. int disconnect = 1;
  2443. int release = 0;
  2444. unsigned int tid = GET_TID(hdr);
  2445. int ret;
  2446. ep = get_ep_from_tid(dev, tid);
  2447. if (!ep)
  2448. return 0;
  2449. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  2450. dst_confirm(ep->dst);
  2451. set_bit(PEER_CLOSE, &ep->com.history);
  2452. mutex_lock(&ep->com.mutex);
  2453. switch (ep->com.state) {
  2454. case MPA_REQ_WAIT:
  2455. __state_set(&ep->com, CLOSING);
  2456. break;
  2457. case MPA_REQ_SENT:
  2458. __state_set(&ep->com, CLOSING);
  2459. connect_reply_upcall(ep, -ECONNRESET);
  2460. break;
  2461. case MPA_REQ_RCVD:
  2462. /*
  2463. * We're gonna mark this puppy DEAD, but keep
  2464. * the reference on it until the ULP accepts or
  2465. * rejects the CR. Also wake up anyone waiting
  2466. * in rdma connection migration (see c4iw_accept_cr()).
  2467. */
  2468. __state_set(&ep->com, CLOSING);
  2469. PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
  2470. c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
  2471. break;
  2472. case MPA_REP_SENT:
  2473. __state_set(&ep->com, CLOSING);
  2474. PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
  2475. c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
  2476. break;
  2477. case FPDU_MODE:
  2478. start_ep_timer(ep);
  2479. __state_set(&ep->com, CLOSING);
  2480. attrs.next_state = C4IW_QP_STATE_CLOSING;
  2481. ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
  2482. C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
  2483. if (ret != -ECONNRESET) {
  2484. peer_close_upcall(ep);
  2485. disconnect = 1;
  2486. }
  2487. break;
  2488. case ABORTING:
  2489. disconnect = 0;
  2490. break;
  2491. case CLOSING:
  2492. __state_set(&ep->com, MORIBUND);
  2493. disconnect = 0;
  2494. break;
  2495. case MORIBUND:
  2496. (void)stop_ep_timer(ep);
  2497. if (ep->com.cm_id && ep->com.qp) {
  2498. attrs.next_state = C4IW_QP_STATE_IDLE;
  2499. c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
  2500. C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
  2501. }
  2502. close_complete_upcall(ep, 0);
  2503. __state_set(&ep->com, DEAD);
  2504. release = 1;
  2505. disconnect = 0;
  2506. break;
  2507. case DEAD:
  2508. disconnect = 0;
  2509. break;
  2510. default:
  2511. BUG_ON(1);
  2512. }
  2513. mutex_unlock(&ep->com.mutex);
  2514. if (disconnect)
  2515. c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
  2516. if (release)
  2517. release_ep_resources(ep);
  2518. c4iw_put_ep(&ep->com);
  2519. return 0;
  2520. }
  2521. static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
  2522. {
  2523. struct cpl_abort_req_rss *req = cplhdr(skb);
  2524. struct c4iw_ep *ep;
  2525. struct cpl_abort_rpl *rpl;
  2526. struct sk_buff *rpl_skb;
  2527. struct c4iw_qp_attributes attrs;
  2528. int ret;
  2529. int release = 0;
  2530. unsigned int tid = GET_TID(req);
  2531. ep = get_ep_from_tid(dev, tid);
  2532. if (!ep)
  2533. return 0;
  2534. if (is_neg_adv(req->status)) {
  2535. PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
  2536. __func__, ep->hwtid, req->status,
  2537. neg_adv_str(req->status));
  2538. ep->stats.abort_neg_adv++;
  2539. mutex_lock(&dev->rdev.stats.lock);
  2540. dev->rdev.stats.neg_adv++;
  2541. mutex_unlock(&dev->rdev.stats.lock);
  2542. goto deref_ep;
  2543. }
  2544. PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
  2545. ep->com.state);
  2546. set_bit(PEER_ABORT, &ep->com.history);
  2547. /*
  2548. * Wake up any threads in rdma_init() or rdma_fini().
  2549. * However, this is not needed if com state is just
  2550. * MPA_REQ_SENT
  2551. */
  2552. if (ep->com.state != MPA_REQ_SENT)
  2553. c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
  2554. mutex_lock(&ep->com.mutex);
  2555. switch (ep->com.state) {
  2556. case CONNECTING:
  2557. c4iw_put_ep(&ep->parent_ep->com);
  2558. break;
  2559. case MPA_REQ_WAIT:
  2560. (void)stop_ep_timer(ep);
  2561. break;
  2562. case MPA_REQ_SENT:
  2563. (void)stop_ep_timer(ep);
  2564. if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
  2565. connect_reply_upcall(ep, -ECONNRESET);
  2566. else {
  2567. /*
  2568. * we just don't send notification upwards because we
  2569. * want to retry with mpa_v1 without upper layers even
  2570. * knowing it.
  2571. *
  2572. * do some housekeeping so as to re-initiate the
  2573. * connection
  2574. */
  2575. PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
  2576. mpa_rev);
  2577. ep->retry_with_mpa_v1 = 1;
  2578. }
  2579. break;
  2580. case MPA_REP_SENT:
  2581. break;
  2582. case MPA_REQ_RCVD:
  2583. break;
  2584. case MORIBUND:
  2585. case CLOSING:
  2586. stop_ep_timer(ep);
  2587. /*FALLTHROUGH*/
  2588. case FPDU_MODE:
  2589. if (ep->com.cm_id && ep->com.qp) {
  2590. attrs.next_state = C4IW_QP_STATE_ERROR;
  2591. ret = c4iw_modify_qp(ep->com.qp->rhp,
  2592. ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
  2593. &attrs, 1);
  2594. if (ret)
  2595. printk(KERN_ERR MOD
  2596. "%s - qp <- error failed!\n",
  2597. __func__);
  2598. }
  2599. peer_abort_upcall(ep);
  2600. break;
  2601. case ABORTING:
  2602. break;
  2603. case DEAD:
  2604. PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
  2605. mutex_unlock(&ep->com.mutex);
  2606. goto deref_ep;
  2607. default:
  2608. BUG_ON(1);
  2609. break;
  2610. }
  2611. dst_confirm(ep->dst);
  2612. if (ep->com.state != ABORTING) {
  2613. __state_set(&ep->com, DEAD);
  2614. /* we don't release if we want to retry with mpa_v1 */
  2615. if (!ep->retry_with_mpa_v1)
  2616. release = 1;
  2617. }
  2618. mutex_unlock(&ep->com.mutex);
  2619. rpl_skb = skb_dequeue(&ep->com.ep_skb_list);
  2620. if (WARN_ON(!rpl_skb)) {
  2621. release = 1;
  2622. goto out;
  2623. }
  2624. set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
  2625. rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
  2626. INIT_TP_WR(rpl, ep->hwtid);
  2627. OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
  2628. rpl->cmd = CPL_ABORT_NO_RST;
  2629. c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
  2630. out:
  2631. if (release)
  2632. release_ep_resources(ep);
  2633. else if (ep->retry_with_mpa_v1) {
  2634. if (ep->com.remote_addr.ss_family == AF_INET6) {
  2635. struct sockaddr_in6 *sin6 =
  2636. (struct sockaddr_in6 *)
  2637. &ep->com.local_addr;
  2638. cxgb4_clip_release(
  2639. ep->com.dev->rdev.lldi.ports[0],
  2640. (const u32 *)&sin6->sin6_addr.s6_addr,
  2641. 1);
  2642. }
  2643. remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
  2644. cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
  2645. dst_release(ep->dst);
  2646. cxgb4_l2t_release(ep->l2t);
  2647. c4iw_reconnect(ep);
  2648. }
  2649. deref_ep:
  2650. c4iw_put_ep(&ep->com);
  2651. /* Dereferencing ep, referenced in peer_abort_intr() */
  2652. c4iw_put_ep(&ep->com);
  2653. return 0;
  2654. }
  2655. static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
  2656. {
  2657. struct c4iw_ep *ep;
  2658. struct c4iw_qp_attributes attrs;
  2659. struct cpl_close_con_rpl *rpl = cplhdr(skb);
  2660. int release = 0;
  2661. unsigned int tid = GET_TID(rpl);
  2662. ep = get_ep_from_tid(dev, tid);
  2663. if (!ep)
  2664. return 0;
  2665. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  2666. BUG_ON(!ep);
  2667. /* The cm_id may be null if we failed to connect */
  2668. mutex_lock(&ep->com.mutex);
  2669. set_bit(CLOSE_CON_RPL, &ep->com.history);
  2670. switch (ep->com.state) {
  2671. case CLOSING:
  2672. __state_set(&ep->com, MORIBUND);
  2673. break;
  2674. case MORIBUND:
  2675. (void)stop_ep_timer(ep);
  2676. if ((ep->com.cm_id) && (ep->com.qp)) {
  2677. attrs.next_state = C4IW_QP_STATE_IDLE;
  2678. c4iw_modify_qp(ep->com.qp->rhp,
  2679. ep->com.qp,
  2680. C4IW_QP_ATTR_NEXT_STATE,
  2681. &attrs, 1);
  2682. }
  2683. close_complete_upcall(ep, 0);
  2684. __state_set(&ep->com, DEAD);
  2685. release = 1;
  2686. break;
  2687. case ABORTING:
  2688. case DEAD:
  2689. break;
  2690. default:
  2691. BUG_ON(1);
  2692. break;
  2693. }
  2694. mutex_unlock(&ep->com.mutex);
  2695. if (release)
  2696. release_ep_resources(ep);
  2697. c4iw_put_ep(&ep->com);
  2698. return 0;
  2699. }
  2700. static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
  2701. {
  2702. struct cpl_rdma_terminate *rpl = cplhdr(skb);
  2703. unsigned int tid = GET_TID(rpl);
  2704. struct c4iw_ep *ep;
  2705. struct c4iw_qp_attributes attrs;
  2706. ep = get_ep_from_tid(dev, tid);
  2707. BUG_ON(!ep);
  2708. if (ep && ep->com.qp) {
  2709. printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
  2710. ep->com.qp->wq.sq.qid);
  2711. attrs.next_state = C4IW_QP_STATE_TERMINATE;
  2712. c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
  2713. C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
  2714. } else
  2715. printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
  2716. c4iw_put_ep(&ep->com);
  2717. return 0;
  2718. }
  2719. /*
  2720. * Upcall from the adapter indicating data has been transmitted.
  2721. * For us its just the single MPA request or reply. We can now free
  2722. * the skb holding the mpa message.
  2723. */
  2724. static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
  2725. {
  2726. struct c4iw_ep *ep;
  2727. struct cpl_fw4_ack *hdr = cplhdr(skb);
  2728. u8 credits = hdr->credits;
  2729. unsigned int tid = GET_TID(hdr);
  2730. ep = get_ep_from_tid(dev, tid);
  2731. if (!ep)
  2732. return 0;
  2733. PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
  2734. if (credits == 0) {
  2735. PDBG("%s 0 credit ack ep %p tid %u state %u\n",
  2736. __func__, ep, ep->hwtid, state_read(&ep->com));
  2737. goto out;
  2738. }
  2739. dst_confirm(ep->dst);
  2740. if (ep->mpa_skb) {
  2741. PDBG("%s last streaming msg ack ep %p tid %u state %u "
  2742. "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
  2743. state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
  2744. mutex_lock(&ep->com.mutex);
  2745. kfree_skb(ep->mpa_skb);
  2746. ep->mpa_skb = NULL;
  2747. if (test_bit(STOP_MPA_TIMER, &ep->com.flags))
  2748. stop_ep_timer(ep);
  2749. mutex_unlock(&ep->com.mutex);
  2750. }
  2751. out:
  2752. c4iw_put_ep(&ep->com);
  2753. return 0;
  2754. }
  2755. int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
  2756. {
  2757. int abort;
  2758. struct c4iw_ep *ep = to_ep(cm_id);
  2759. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  2760. mutex_lock(&ep->com.mutex);
  2761. if (ep->com.state != MPA_REQ_RCVD) {
  2762. mutex_unlock(&ep->com.mutex);
  2763. c4iw_put_ep(&ep->com);
  2764. return -ECONNRESET;
  2765. }
  2766. set_bit(ULP_REJECT, &ep->com.history);
  2767. if (mpa_rev == 0)
  2768. abort = 1;
  2769. else
  2770. abort = send_mpa_reject(ep, pdata, pdata_len);
  2771. mutex_unlock(&ep->com.mutex);
  2772. stop_ep_timer(ep);
  2773. c4iw_ep_disconnect(ep, abort != 0, GFP_KERNEL);
  2774. c4iw_put_ep(&ep->com);
  2775. return 0;
  2776. }
  2777. int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
  2778. {
  2779. int err;
  2780. struct c4iw_qp_attributes attrs;
  2781. enum c4iw_qp_attr_mask mask;
  2782. struct c4iw_ep *ep = to_ep(cm_id);
  2783. struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
  2784. struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
  2785. int abort = 0;
  2786. PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
  2787. mutex_lock(&ep->com.mutex);
  2788. if (ep->com.state != MPA_REQ_RCVD) {
  2789. err = -ECONNRESET;
  2790. goto err_out;
  2791. }
  2792. BUG_ON(!qp);
  2793. set_bit(ULP_ACCEPT, &ep->com.history);
  2794. if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
  2795. (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
  2796. err = -EINVAL;
  2797. goto err_abort;
  2798. }
  2799. if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
  2800. if (conn_param->ord > ep->ird) {
  2801. if (RELAXED_IRD_NEGOTIATION) {
  2802. conn_param->ord = ep->ird;
  2803. } else {
  2804. ep->ird = conn_param->ird;
  2805. ep->ord = conn_param->ord;
  2806. send_mpa_reject(ep, conn_param->private_data,
  2807. conn_param->private_data_len);
  2808. err = -ENOMEM;
  2809. goto err_abort;
  2810. }
  2811. }
  2812. if (conn_param->ird < ep->ord) {
  2813. if (RELAXED_IRD_NEGOTIATION &&
  2814. ep->ord <= h->rdev.lldi.max_ordird_qp) {
  2815. conn_param->ird = ep->ord;
  2816. } else {
  2817. err = -ENOMEM;
  2818. goto err_abort;
  2819. }
  2820. }
  2821. }
  2822. ep->ird = conn_param->ird;
  2823. ep->ord = conn_param->ord;
  2824. if (ep->mpa_attr.version == 1) {
  2825. if (peer2peer && ep->ird == 0)
  2826. ep->ird = 1;
  2827. } else {
  2828. if (peer2peer &&
  2829. (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
  2830. (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ird == 0)
  2831. ep->ird = 1;
  2832. }
  2833. PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
  2834. ep->com.cm_id = cm_id;
  2835. ref_cm_id(&ep->com);
  2836. ep->com.qp = qp;
  2837. ref_qp(ep);
  2838. /* bind QP to EP and move to RTS */
  2839. attrs.mpa_attr = ep->mpa_attr;
  2840. attrs.max_ird = ep->ird;
  2841. attrs.max_ord = ep->ord;
  2842. attrs.llp_stream_handle = ep;
  2843. attrs.next_state = C4IW_QP_STATE_RTS;
  2844. /* bind QP and TID with INIT_WR */
  2845. mask = C4IW_QP_ATTR_NEXT_STATE |
  2846. C4IW_QP_ATTR_LLP_STREAM_HANDLE |
  2847. C4IW_QP_ATTR_MPA_ATTR |
  2848. C4IW_QP_ATTR_MAX_IRD |
  2849. C4IW_QP_ATTR_MAX_ORD;
  2850. err = c4iw_modify_qp(ep->com.qp->rhp,
  2851. ep->com.qp, mask, &attrs, 1);
  2852. if (err)
  2853. goto err_deref_cm_id;
  2854. set_bit(STOP_MPA_TIMER, &ep->com.flags);
  2855. err = send_mpa_reply(ep, conn_param->private_data,
  2856. conn_param->private_data_len);
  2857. if (err)
  2858. goto err_deref_cm_id;
  2859. __state_set(&ep->com, FPDU_MODE);
  2860. established_upcall(ep);
  2861. mutex_unlock(&ep->com.mutex);
  2862. c4iw_put_ep(&ep->com);
  2863. return 0;
  2864. err_deref_cm_id:
  2865. deref_cm_id(&ep->com);
  2866. err_abort:
  2867. abort = 1;
  2868. err_out:
  2869. mutex_unlock(&ep->com.mutex);
  2870. if (abort)
  2871. c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
  2872. c4iw_put_ep(&ep->com);
  2873. return err;
  2874. }
  2875. static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
  2876. {
  2877. struct in_device *ind;
  2878. int found = 0;
  2879. struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
  2880. struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
  2881. ind = in_dev_get(dev->rdev.lldi.ports[0]);
  2882. if (!ind)
  2883. return -EADDRNOTAVAIL;
  2884. for_primary_ifa(ind) {
  2885. laddr->sin_addr.s_addr = ifa->ifa_address;
  2886. raddr->sin_addr.s_addr = ifa->ifa_address;
  2887. found = 1;
  2888. break;
  2889. }
  2890. endfor_ifa(ind);
  2891. in_dev_put(ind);
  2892. return found ? 0 : -EADDRNOTAVAIL;
  2893. }
  2894. static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
  2895. unsigned char banned_flags)
  2896. {
  2897. struct inet6_dev *idev;
  2898. int err = -EADDRNOTAVAIL;
  2899. rcu_read_lock();
  2900. idev = __in6_dev_get(dev);
  2901. if (idev != NULL) {
  2902. struct inet6_ifaddr *ifp;
  2903. read_lock_bh(&idev->lock);
  2904. list_for_each_entry(ifp, &idev->addr_list, if_list) {
  2905. if (ifp->scope == IFA_LINK &&
  2906. !(ifp->flags & banned_flags)) {
  2907. memcpy(addr, &ifp->addr, 16);
  2908. err = 0;
  2909. break;
  2910. }
  2911. }
  2912. read_unlock_bh(&idev->lock);
  2913. }
  2914. rcu_read_unlock();
  2915. return err;
  2916. }
  2917. static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
  2918. {
  2919. struct in6_addr uninitialized_var(addr);
  2920. struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->m_local_addr;
  2921. struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_remote_addr;
  2922. if (!get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
  2923. memcpy(la6->sin6_addr.s6_addr, &addr, 16);
  2924. memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
  2925. return 0;
  2926. }
  2927. return -EADDRNOTAVAIL;
  2928. }
  2929. int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
  2930. {
  2931. struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
  2932. struct c4iw_ep *ep;
  2933. int err = 0;
  2934. struct sockaddr_in *laddr;
  2935. struct sockaddr_in *raddr;
  2936. struct sockaddr_in6 *laddr6;
  2937. struct sockaddr_in6 *raddr6;
  2938. __u8 *ra;
  2939. int iptype;
  2940. if ((conn_param->ord > cur_max_read_depth(dev)) ||
  2941. (conn_param->ird > cur_max_read_depth(dev))) {
  2942. err = -EINVAL;
  2943. goto out;
  2944. }
  2945. ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
  2946. if (!ep) {
  2947. printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
  2948. err = -ENOMEM;
  2949. goto out;
  2950. }
  2951. skb_queue_head_init(&ep->com.ep_skb_list);
  2952. if (alloc_ep_skb_list(&ep->com.ep_skb_list, CN_MAX_CON_BUF)) {
  2953. err = -ENOMEM;
  2954. goto fail1;
  2955. }
  2956. init_timer(&ep->timer);
  2957. ep->plen = conn_param->private_data_len;
  2958. if (ep->plen)
  2959. memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
  2960. conn_param->private_data, ep->plen);
  2961. ep->ird = conn_param->ird;
  2962. ep->ord = conn_param->ord;
  2963. if (peer2peer && ep->ord == 0)
  2964. ep->ord = 1;
  2965. ep->com.cm_id = cm_id;
  2966. ref_cm_id(&ep->com);
  2967. ep->com.dev = dev;
  2968. ep->com.qp = get_qhp(dev, conn_param->qpn);
  2969. if (!ep->com.qp) {
  2970. PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
  2971. err = -EINVAL;
  2972. goto fail2;
  2973. }
  2974. ref_qp(ep);
  2975. PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
  2976. ep->com.qp, cm_id);
  2977. /*
  2978. * Allocate an active TID to initiate a TCP connection.
  2979. */
  2980. ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
  2981. if (ep->atid == -1) {
  2982. printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
  2983. err = -ENOMEM;
  2984. goto fail2;
  2985. }
  2986. insert_handle(dev, &dev->atid_idr, ep, ep->atid);
  2987. memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
  2988. sizeof(ep->com.local_addr));
  2989. memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
  2990. sizeof(ep->com.remote_addr));
  2991. laddr = (struct sockaddr_in *)&ep->com.local_addr;
  2992. raddr = (struct sockaddr_in *)&ep->com.remote_addr;
  2993. laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr;
  2994. raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr;
  2995. if (cm_id->m_remote_addr.ss_family == AF_INET) {
  2996. iptype = 4;
  2997. ra = (__u8 *)&raddr->sin_addr;
  2998. /*
  2999. * Handle loopback requests to INADDR_ANY.
  3000. */
  3001. if (raddr->sin_addr.s_addr == htonl(INADDR_ANY)) {
  3002. err = pick_local_ipaddrs(dev, cm_id);
  3003. if (err)
  3004. goto fail2;
  3005. }
  3006. /* find a route */
  3007. PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
  3008. __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
  3009. ra, ntohs(raddr->sin_port));
  3010. ep->dst = find_route(dev, laddr->sin_addr.s_addr,
  3011. raddr->sin_addr.s_addr, laddr->sin_port,
  3012. raddr->sin_port, cm_id->tos);
  3013. } else {
  3014. iptype = 6;
  3015. ra = (__u8 *)&raddr6->sin6_addr;
  3016. /*
  3017. * Handle loopback requests to INADDR_ANY.
  3018. */
  3019. if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
  3020. err = pick_local_ip6addrs(dev, cm_id);
  3021. if (err)
  3022. goto fail2;
  3023. }
  3024. /* find a route */
  3025. PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
  3026. __func__, laddr6->sin6_addr.s6_addr,
  3027. ntohs(laddr6->sin6_port),
  3028. raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
  3029. ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
  3030. raddr6->sin6_addr.s6_addr,
  3031. laddr6->sin6_port, raddr6->sin6_port, 0,
  3032. raddr6->sin6_scope_id);
  3033. }
  3034. if (!ep->dst) {
  3035. printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
  3036. err = -EHOSTUNREACH;
  3037. goto fail3;
  3038. }
  3039. err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true,
  3040. ep->com.dev->rdev.lldi.adapter_type, cm_id->tos);
  3041. if (err) {
  3042. printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
  3043. goto fail4;
  3044. }
  3045. PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
  3046. __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
  3047. ep->l2t->idx);
  3048. state_set(&ep->com, CONNECTING);
  3049. ep->tos = cm_id->tos;
  3050. /* send connect request to rnic */
  3051. err = send_connect(ep);
  3052. if (!err)
  3053. goto out;
  3054. cxgb4_l2t_release(ep->l2t);
  3055. fail4:
  3056. dst_release(ep->dst);
  3057. fail3:
  3058. remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
  3059. cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
  3060. fail2:
  3061. skb_queue_purge(&ep->com.ep_skb_list);
  3062. deref_cm_id(&ep->com);
  3063. fail1:
  3064. c4iw_put_ep(&ep->com);
  3065. out:
  3066. return err;
  3067. }
  3068. static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
  3069. {
  3070. int err;
  3071. struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
  3072. &ep->com.local_addr;
  3073. if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) {
  3074. err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
  3075. (const u32 *)&sin6->sin6_addr.s6_addr, 1);
  3076. if (err)
  3077. return err;
  3078. }
  3079. c4iw_init_wr_wait(&ep->com.wr_wait);
  3080. err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
  3081. ep->stid, &sin6->sin6_addr,
  3082. sin6->sin6_port,
  3083. ep->com.dev->rdev.lldi.rxq_ids[0]);
  3084. if (!err)
  3085. err = c4iw_wait_for_reply(&ep->com.dev->rdev,
  3086. &ep->com.wr_wait,
  3087. 0, 0, __func__);
  3088. else if (err > 0)
  3089. err = net_xmit_errno(err);
  3090. if (err) {
  3091. cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
  3092. (const u32 *)&sin6->sin6_addr.s6_addr, 1);
  3093. pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
  3094. err, ep->stid,
  3095. sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
  3096. }
  3097. return err;
  3098. }
  3099. static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
  3100. {
  3101. int err;
  3102. struct sockaddr_in *sin = (struct sockaddr_in *)
  3103. &ep->com.local_addr;
  3104. if (dev->rdev.lldi.enable_fw_ofld_conn) {
  3105. do {
  3106. err = cxgb4_create_server_filter(
  3107. ep->com.dev->rdev.lldi.ports[0], ep->stid,
  3108. sin->sin_addr.s_addr, sin->sin_port, 0,
  3109. ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
  3110. if (err == -EBUSY) {
  3111. if (c4iw_fatal_error(&ep->com.dev->rdev)) {
  3112. err = -EIO;
  3113. break;
  3114. }
  3115. set_current_state(TASK_UNINTERRUPTIBLE);
  3116. schedule_timeout(usecs_to_jiffies(100));
  3117. }
  3118. } while (err == -EBUSY);
  3119. } else {
  3120. c4iw_init_wr_wait(&ep->com.wr_wait);
  3121. err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
  3122. ep->stid, sin->sin_addr.s_addr, sin->sin_port,
  3123. 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
  3124. if (!err)
  3125. err = c4iw_wait_for_reply(&ep->com.dev->rdev,
  3126. &ep->com.wr_wait,
  3127. 0, 0, __func__);
  3128. else if (err > 0)
  3129. err = net_xmit_errno(err);
  3130. }
  3131. if (err)
  3132. pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
  3133. , err, ep->stid,
  3134. &sin->sin_addr, ntohs(sin->sin_port));
  3135. return err;
  3136. }
  3137. int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
  3138. {
  3139. int err = 0;
  3140. struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
  3141. struct c4iw_listen_ep *ep;
  3142. might_sleep();
  3143. ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
  3144. if (!ep) {
  3145. printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
  3146. err = -ENOMEM;
  3147. goto fail1;
  3148. }
  3149. skb_queue_head_init(&ep->com.ep_skb_list);
  3150. PDBG("%s ep %p\n", __func__, ep);
  3151. ep->com.cm_id = cm_id;
  3152. ref_cm_id(&ep->com);
  3153. ep->com.dev = dev;
  3154. ep->backlog = backlog;
  3155. memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
  3156. sizeof(ep->com.local_addr));
  3157. /*
  3158. * Allocate a server TID.
  3159. */
  3160. if (dev->rdev.lldi.enable_fw_ofld_conn &&
  3161. ep->com.local_addr.ss_family == AF_INET)
  3162. ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
  3163. cm_id->m_local_addr.ss_family, ep);
  3164. else
  3165. ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
  3166. cm_id->m_local_addr.ss_family, ep);
  3167. if (ep->stid == -1) {
  3168. printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
  3169. err = -ENOMEM;
  3170. goto fail2;
  3171. }
  3172. insert_handle(dev, &dev->stid_idr, ep, ep->stid);
  3173. memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
  3174. sizeof(ep->com.local_addr));
  3175. state_set(&ep->com, LISTEN);
  3176. if (ep->com.local_addr.ss_family == AF_INET)
  3177. err = create_server4(dev, ep);
  3178. else
  3179. err = create_server6(dev, ep);
  3180. if (!err) {
  3181. cm_id->provider_data = ep;
  3182. goto out;
  3183. }
  3184. cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
  3185. ep->com.local_addr.ss_family);
  3186. fail2:
  3187. deref_cm_id(&ep->com);
  3188. c4iw_put_ep(&ep->com);
  3189. fail1:
  3190. out:
  3191. return err;
  3192. }
  3193. int c4iw_destroy_listen(struct iw_cm_id *cm_id)
  3194. {
  3195. int err;
  3196. struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
  3197. PDBG("%s ep %p\n", __func__, ep);
  3198. might_sleep();
  3199. state_set(&ep->com, DEAD);
  3200. if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
  3201. ep->com.local_addr.ss_family == AF_INET) {
  3202. err = cxgb4_remove_server_filter(
  3203. ep->com.dev->rdev.lldi.ports[0], ep->stid,
  3204. ep->com.dev->rdev.lldi.rxq_ids[0], 0);
  3205. } else {
  3206. struct sockaddr_in6 *sin6;
  3207. c4iw_init_wr_wait(&ep->com.wr_wait);
  3208. err = cxgb4_remove_server(
  3209. ep->com.dev->rdev.lldi.ports[0], ep->stid,
  3210. ep->com.dev->rdev.lldi.rxq_ids[0], 0);
  3211. if (err)
  3212. goto done;
  3213. err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
  3214. 0, 0, __func__);
  3215. sin6 = (struct sockaddr_in6 *)&ep->com.local_addr;
  3216. cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
  3217. (const u32 *)&sin6->sin6_addr.s6_addr, 1);
  3218. }
  3219. remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
  3220. cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
  3221. ep->com.local_addr.ss_family);
  3222. done:
  3223. deref_cm_id(&ep->com);
  3224. c4iw_put_ep(&ep->com);
  3225. return err;
  3226. }
  3227. int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
  3228. {
  3229. int ret = 0;
  3230. int close = 0;
  3231. int fatal = 0;
  3232. struct c4iw_rdev *rdev;
  3233. mutex_lock(&ep->com.mutex);
  3234. PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
  3235. states[ep->com.state], abrupt);
  3236. /*
  3237. * Ref the ep here in case we have fatal errors causing the
  3238. * ep to be released and freed.
  3239. */
  3240. c4iw_get_ep(&ep->com);
  3241. rdev = &ep->com.dev->rdev;
  3242. if (c4iw_fatal_error(rdev)) {
  3243. fatal = 1;
  3244. close_complete_upcall(ep, -EIO);
  3245. ep->com.state = DEAD;
  3246. }
  3247. switch (ep->com.state) {
  3248. case MPA_REQ_WAIT:
  3249. case MPA_REQ_SENT:
  3250. case MPA_REQ_RCVD:
  3251. case MPA_REP_SENT:
  3252. case FPDU_MODE:
  3253. case CONNECTING:
  3254. close = 1;
  3255. if (abrupt)
  3256. ep->com.state = ABORTING;
  3257. else {
  3258. ep->com.state = CLOSING;
  3259. /*
  3260. * if we close before we see the fw4_ack() then we fix
  3261. * up the timer state since we're reusing it.
  3262. */
  3263. if (ep->mpa_skb &&
  3264. test_bit(STOP_MPA_TIMER, &ep->com.flags)) {
  3265. clear_bit(STOP_MPA_TIMER, &ep->com.flags);
  3266. stop_ep_timer(ep);
  3267. }
  3268. start_ep_timer(ep);
  3269. }
  3270. set_bit(CLOSE_SENT, &ep->com.flags);
  3271. break;
  3272. case CLOSING:
  3273. if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
  3274. close = 1;
  3275. if (abrupt) {
  3276. (void)stop_ep_timer(ep);
  3277. ep->com.state = ABORTING;
  3278. } else
  3279. ep->com.state = MORIBUND;
  3280. }
  3281. break;
  3282. case MORIBUND:
  3283. case ABORTING:
  3284. case DEAD:
  3285. PDBG("%s ignoring disconnect ep %p state %u\n",
  3286. __func__, ep, ep->com.state);
  3287. break;
  3288. default:
  3289. BUG();
  3290. break;
  3291. }
  3292. if (close) {
  3293. if (abrupt) {
  3294. set_bit(EP_DISC_ABORT, &ep->com.history);
  3295. close_complete_upcall(ep, -ECONNRESET);
  3296. ret = send_abort(ep);
  3297. } else {
  3298. set_bit(EP_DISC_CLOSE, &ep->com.history);
  3299. ret = send_halfclose(ep);
  3300. }
  3301. if (ret) {
  3302. set_bit(EP_DISC_FAIL, &ep->com.history);
  3303. if (!abrupt) {
  3304. stop_ep_timer(ep);
  3305. close_complete_upcall(ep, -EIO);
  3306. }
  3307. if (ep->com.qp) {
  3308. struct c4iw_qp_attributes attrs;
  3309. attrs.next_state = C4IW_QP_STATE_ERROR;
  3310. ret = c4iw_modify_qp(ep->com.qp->rhp,
  3311. ep->com.qp,
  3312. C4IW_QP_ATTR_NEXT_STATE,
  3313. &attrs, 1);
  3314. if (ret)
  3315. pr_err(MOD
  3316. "%s - qp <- error failed!\n",
  3317. __func__);
  3318. }
  3319. fatal = 1;
  3320. }
  3321. }
  3322. mutex_unlock(&ep->com.mutex);
  3323. c4iw_put_ep(&ep->com);
  3324. if (fatal)
  3325. release_ep_resources(ep);
  3326. return ret;
  3327. }
  3328. static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
  3329. struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
  3330. {
  3331. struct c4iw_ep *ep;
  3332. int atid = be32_to_cpu(req->tid);
  3333. ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
  3334. (__force u32) req->tid);
  3335. if (!ep)
  3336. return;
  3337. switch (req->retval) {
  3338. case FW_ENOMEM:
  3339. set_bit(ACT_RETRY_NOMEM, &ep->com.history);
  3340. if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
  3341. send_fw_act_open_req(ep, atid);
  3342. return;
  3343. }
  3344. case FW_EADDRINUSE:
  3345. set_bit(ACT_RETRY_INUSE, &ep->com.history);
  3346. if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
  3347. send_fw_act_open_req(ep, atid);
  3348. return;
  3349. }
  3350. break;
  3351. default:
  3352. pr_info("%s unexpected ofld conn wr retval %d\n",
  3353. __func__, req->retval);
  3354. break;
  3355. }
  3356. pr_err("active ofld_connect_wr failure %d atid %d\n",
  3357. req->retval, atid);
  3358. mutex_lock(&dev->rdev.stats.lock);
  3359. dev->rdev.stats.act_ofld_conn_fails++;
  3360. mutex_unlock(&dev->rdev.stats.lock);
  3361. connect_reply_upcall(ep, status2errno(req->retval));
  3362. state_set(&ep->com, DEAD);
  3363. if (ep->com.remote_addr.ss_family == AF_INET6) {
  3364. struct sockaddr_in6 *sin6 =
  3365. (struct sockaddr_in6 *)&ep->com.local_addr;
  3366. cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
  3367. (const u32 *)&sin6->sin6_addr.s6_addr, 1);
  3368. }
  3369. remove_handle(dev, &dev->atid_idr, atid);
  3370. cxgb4_free_atid(dev->rdev.lldi.tids, atid);
  3371. dst_release(ep->dst);
  3372. cxgb4_l2t_release(ep->l2t);
  3373. c4iw_put_ep(&ep->com);
  3374. }
  3375. static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
  3376. struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
  3377. {
  3378. struct sk_buff *rpl_skb;
  3379. struct cpl_pass_accept_req *cpl;
  3380. int ret;
  3381. rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
  3382. BUG_ON(!rpl_skb);
  3383. if (req->retval) {
  3384. PDBG("%s passive open failure %d\n", __func__, req->retval);
  3385. mutex_lock(&dev->rdev.stats.lock);
  3386. dev->rdev.stats.pas_ofld_conn_fails++;
  3387. mutex_unlock(&dev->rdev.stats.lock);
  3388. kfree_skb(rpl_skb);
  3389. } else {
  3390. cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
  3391. OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
  3392. (__force u32) htonl(
  3393. (__force u32) req->tid)));
  3394. ret = pass_accept_req(dev, rpl_skb);
  3395. if (!ret)
  3396. kfree_skb(rpl_skb);
  3397. }
  3398. return;
  3399. }
  3400. static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
  3401. {
  3402. struct cpl_fw6_msg *rpl = cplhdr(skb);
  3403. struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
  3404. switch (rpl->type) {
  3405. case FW6_TYPE_CQE:
  3406. c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
  3407. break;
  3408. case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
  3409. req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
  3410. switch (req->t_state) {
  3411. case TCP_SYN_SENT:
  3412. active_ofld_conn_reply(dev, skb, req);
  3413. break;
  3414. case TCP_SYN_RECV:
  3415. passive_ofld_conn_reply(dev, skb, req);
  3416. break;
  3417. default:
  3418. pr_err("%s unexpected ofld conn wr state %d\n",
  3419. __func__, req->t_state);
  3420. break;
  3421. }
  3422. break;
  3423. }
  3424. return 0;
  3425. }
  3426. static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
  3427. {
  3428. __be32 l2info;
  3429. __be16 hdr_len, vlantag, len;
  3430. u16 eth_hdr_len;
  3431. int tcp_hdr_len, ip_hdr_len;
  3432. u8 intf;
  3433. struct cpl_rx_pkt *cpl = cplhdr(skb);
  3434. struct cpl_pass_accept_req *req;
  3435. struct tcp_options_received tmp_opt;
  3436. struct c4iw_dev *dev;
  3437. enum chip_type type;
  3438. dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
  3439. /* Store values from cpl_rx_pkt in temporary location. */
  3440. vlantag = cpl->vlan;
  3441. len = cpl->len;
  3442. l2info = cpl->l2info;
  3443. hdr_len = cpl->hdr_len;
  3444. intf = cpl->iff;
  3445. __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
  3446. /*
  3447. * We need to parse the TCP options from SYN packet.
  3448. * to generate cpl_pass_accept_req.
  3449. */
  3450. memset(&tmp_opt, 0, sizeof(tmp_opt));
  3451. tcp_clear_options(&tmp_opt);
  3452. tcp_parse_options(skb, &tmp_opt, 0, NULL);
  3453. req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
  3454. memset(req, 0, sizeof(*req));
  3455. req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
  3456. SYN_MAC_IDX_V(RX_MACIDX_G(
  3457. be32_to_cpu(l2info))) |
  3458. SYN_XACT_MATCH_F);
  3459. type = dev->rdev.lldi.adapter_type;
  3460. tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len));
  3461. ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len));
  3462. req->hdr_len =
  3463. cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info))));
  3464. if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) {
  3465. eth_hdr_len = is_t4(type) ?
  3466. RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) :
  3467. RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info));
  3468. req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) |
  3469. IP_HDR_LEN_V(ip_hdr_len) |
  3470. ETH_HDR_LEN_V(eth_hdr_len));
  3471. } else { /* T6 and later */
  3472. eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info));
  3473. req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) |
  3474. T6_IP_HDR_LEN_V(ip_hdr_len) |
  3475. T6_ETH_HDR_LEN_V(eth_hdr_len));
  3476. }
  3477. req->vlan = vlantag;
  3478. req->len = len;
  3479. req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
  3480. PASS_OPEN_TOS_V(tos));
  3481. req->tcpopt.mss = htons(tmp_opt.mss_clamp);
  3482. if (tmp_opt.wscale_ok)
  3483. req->tcpopt.wsf = tmp_opt.snd_wscale;
  3484. req->tcpopt.tstamp = tmp_opt.saw_tstamp;
  3485. if (tmp_opt.sack_ok)
  3486. req->tcpopt.sack = 1;
  3487. OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
  3488. return;
  3489. }
  3490. static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
  3491. __be32 laddr, __be16 lport,
  3492. __be32 raddr, __be16 rport,
  3493. u32 rcv_isn, u32 filter, u16 window,
  3494. u32 rss_qid, u8 port_id)
  3495. {
  3496. struct sk_buff *req_skb;
  3497. struct fw_ofld_connection_wr *req;
  3498. struct cpl_pass_accept_req *cpl = cplhdr(skb);
  3499. int ret;
  3500. req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
  3501. req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
  3502. memset(req, 0, sizeof(*req));
  3503. req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
  3504. req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
  3505. req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
  3506. req->le.filter = (__force __be32) filter;
  3507. req->le.lport = lport;
  3508. req->le.pport = rport;
  3509. req->le.u.ipv4.lip = laddr;
  3510. req->le.u.ipv4.pip = raddr;
  3511. req->tcb.rcv_nxt = htonl(rcv_isn + 1);
  3512. req->tcb.rcv_adv = htons(window);
  3513. req->tcb.t_state_to_astid =
  3514. htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
  3515. FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
  3516. FW_OFLD_CONNECTION_WR_ASTID_V(
  3517. PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
  3518. /*
  3519. * We store the qid in opt2 which will be used by the firmware
  3520. * to send us the wr response.
  3521. */
  3522. req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
  3523. /*
  3524. * We initialize the MSS index in TCB to 0xF.
  3525. * So that when driver sends cpl_pass_accept_rpl
  3526. * TCB picks up the correct value. If this was 0
  3527. * TP will ignore any value > 0 for MSS index.
  3528. */
  3529. req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
  3530. req->cookie = (uintptr_t)skb;
  3531. set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
  3532. ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
  3533. if (ret < 0) {
  3534. pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
  3535. ret);
  3536. kfree_skb(skb);
  3537. kfree_skb(req_skb);
  3538. }
  3539. }
  3540. /*
  3541. * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
  3542. * messages when a filter is being used instead of server to
  3543. * redirect a syn packet. When packets hit filter they are redirected
  3544. * to the offload queue and driver tries to establish the connection
  3545. * using firmware work request.
  3546. */
  3547. static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
  3548. {
  3549. int stid;
  3550. unsigned int filter;
  3551. struct ethhdr *eh = NULL;
  3552. struct vlan_ethhdr *vlan_eh = NULL;
  3553. struct iphdr *iph;
  3554. struct tcphdr *tcph;
  3555. struct rss_header *rss = (void *)skb->data;
  3556. struct cpl_rx_pkt *cpl = (void *)skb->data;
  3557. struct cpl_pass_accept_req *req = (void *)(rss + 1);
  3558. struct l2t_entry *e;
  3559. struct dst_entry *dst;
  3560. struct c4iw_ep *lep = NULL;
  3561. u16 window;
  3562. struct port_info *pi;
  3563. struct net_device *pdev;
  3564. u16 rss_qid, eth_hdr_len;
  3565. int step;
  3566. u32 tx_chan;
  3567. struct neighbour *neigh;
  3568. /* Drop all non-SYN packets */
  3569. if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
  3570. goto reject;
  3571. /*
  3572. * Drop all packets which did not hit the filter.
  3573. * Unlikely to happen.
  3574. */
  3575. if (!(rss->filter_hit && rss->filter_tid))
  3576. goto reject;
  3577. /*
  3578. * Calculate the server tid from filter hit index from cpl_rx_pkt.
  3579. */
  3580. stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
  3581. lep = (struct c4iw_ep *)get_ep_from_stid(dev, stid);
  3582. if (!lep) {
  3583. PDBG("%s connect request on invalid stid %d\n", __func__, stid);
  3584. goto reject;
  3585. }
  3586. switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) {
  3587. case CHELSIO_T4:
  3588. eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
  3589. break;
  3590. case CHELSIO_T5:
  3591. eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
  3592. break;
  3593. case CHELSIO_T6:
  3594. eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info));
  3595. break;
  3596. default:
  3597. pr_err("T%d Chip is not supported\n",
  3598. CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type));
  3599. goto reject;
  3600. }
  3601. if (eth_hdr_len == ETH_HLEN) {
  3602. eh = (struct ethhdr *)(req + 1);
  3603. iph = (struct iphdr *)(eh + 1);
  3604. } else {
  3605. vlan_eh = (struct vlan_ethhdr *)(req + 1);
  3606. iph = (struct iphdr *)(vlan_eh + 1);
  3607. skb->vlan_tci = ntohs(cpl->vlan);
  3608. }
  3609. if (iph->version != 0x4)
  3610. goto reject;
  3611. tcph = (struct tcphdr *)(iph + 1);
  3612. skb_set_network_header(skb, (void *)iph - (void *)rss);
  3613. skb_set_transport_header(skb, (void *)tcph - (void *)rss);
  3614. skb_get(skb);
  3615. PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
  3616. ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
  3617. ntohs(tcph->source), iph->tos);
  3618. dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
  3619. iph->tos);
  3620. if (!dst) {
  3621. pr_err("%s - failed to find dst entry!\n",
  3622. __func__);
  3623. goto reject;
  3624. }
  3625. neigh = dst_neigh_lookup_skb(dst, skb);
  3626. if (!neigh) {
  3627. pr_err("%s - failed to allocate neigh!\n",
  3628. __func__);
  3629. goto free_dst;
  3630. }
  3631. if (neigh->dev->flags & IFF_LOOPBACK) {
  3632. pdev = ip_dev_find(&init_net, iph->daddr);
  3633. e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
  3634. pdev, 0);
  3635. pi = (struct port_info *)netdev_priv(pdev);
  3636. tx_chan = cxgb4_port_chan(pdev);
  3637. dev_put(pdev);
  3638. } else {
  3639. pdev = get_real_dev(neigh->dev);
  3640. e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
  3641. pdev, 0);
  3642. pi = (struct port_info *)netdev_priv(pdev);
  3643. tx_chan = cxgb4_port_chan(pdev);
  3644. }
  3645. neigh_release(neigh);
  3646. if (!e) {
  3647. pr_err("%s - failed to allocate l2t entry!\n",
  3648. __func__);
  3649. goto free_dst;
  3650. }
  3651. step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
  3652. rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
  3653. window = (__force u16) htons((__force u16)tcph->window);
  3654. /* Calcuate filter portion for LE region. */
  3655. filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
  3656. dev->rdev.lldi.ports[0],
  3657. e));
  3658. /*
  3659. * Synthesize the cpl_pass_accept_req. We have everything except the
  3660. * TID. Once firmware sends a reply with TID we update the TID field
  3661. * in cpl and pass it through the regular cpl_pass_accept_req path.
  3662. */
  3663. build_cpl_pass_accept_req(skb, stid, iph->tos);
  3664. send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
  3665. tcph->source, ntohl(tcph->seq), filter, window,
  3666. rss_qid, pi->port_id);
  3667. cxgb4_l2t_release(e);
  3668. free_dst:
  3669. dst_release(dst);
  3670. reject:
  3671. if (lep)
  3672. c4iw_put_ep(&lep->com);
  3673. return 0;
  3674. }
  3675. /*
  3676. * These are the real handlers that are called from a
  3677. * work queue.
  3678. */
  3679. static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = {
  3680. [CPL_ACT_ESTABLISH] = act_establish,
  3681. [CPL_ACT_OPEN_RPL] = act_open_rpl,
  3682. [CPL_RX_DATA] = rx_data,
  3683. [CPL_ABORT_RPL_RSS] = abort_rpl,
  3684. [CPL_ABORT_RPL] = abort_rpl,
  3685. [CPL_PASS_OPEN_RPL] = pass_open_rpl,
  3686. [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
  3687. [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
  3688. [CPL_PASS_ESTABLISH] = pass_establish,
  3689. [CPL_PEER_CLOSE] = peer_close,
  3690. [CPL_ABORT_REQ_RSS] = peer_abort,
  3691. [CPL_CLOSE_CON_RPL] = close_con_rpl,
  3692. [CPL_RDMA_TERMINATE] = terminate,
  3693. [CPL_FW4_ACK] = fw4_ack,
  3694. [CPL_FW6_MSG] = deferred_fw6_msg,
  3695. [CPL_RX_PKT] = rx_pkt,
  3696. [FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe,
  3697. [FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe
  3698. };
  3699. static void process_timeout(struct c4iw_ep *ep)
  3700. {
  3701. struct c4iw_qp_attributes attrs;
  3702. int abort = 1;
  3703. mutex_lock(&ep->com.mutex);
  3704. PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
  3705. ep->com.state);
  3706. set_bit(TIMEDOUT, &ep->com.history);
  3707. switch (ep->com.state) {
  3708. case MPA_REQ_SENT:
  3709. connect_reply_upcall(ep, -ETIMEDOUT);
  3710. break;
  3711. case MPA_REQ_WAIT:
  3712. case MPA_REQ_RCVD:
  3713. case MPA_REP_SENT:
  3714. case FPDU_MODE:
  3715. break;
  3716. case CLOSING:
  3717. case MORIBUND:
  3718. if (ep->com.cm_id && ep->com.qp) {
  3719. attrs.next_state = C4IW_QP_STATE_ERROR;
  3720. c4iw_modify_qp(ep->com.qp->rhp,
  3721. ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
  3722. &attrs, 1);
  3723. }
  3724. close_complete_upcall(ep, -ETIMEDOUT);
  3725. break;
  3726. case ABORTING:
  3727. case DEAD:
  3728. /*
  3729. * These states are expected if the ep timed out at the same
  3730. * time as another thread was calling stop_ep_timer().
  3731. * So we silently do nothing for these states.
  3732. */
  3733. abort = 0;
  3734. break;
  3735. default:
  3736. WARN(1, "%s unexpected state ep %p tid %u state %u\n",
  3737. __func__, ep, ep->hwtid, ep->com.state);
  3738. abort = 0;
  3739. }
  3740. mutex_unlock(&ep->com.mutex);
  3741. if (abort)
  3742. c4iw_ep_disconnect(ep, 1, GFP_KERNEL);
  3743. c4iw_put_ep(&ep->com);
  3744. }
  3745. static void process_timedout_eps(void)
  3746. {
  3747. struct c4iw_ep *ep;
  3748. spin_lock_irq(&timeout_lock);
  3749. while (!list_empty(&timeout_list)) {
  3750. struct list_head *tmp;
  3751. tmp = timeout_list.next;
  3752. list_del(tmp);
  3753. tmp->next = NULL;
  3754. tmp->prev = NULL;
  3755. spin_unlock_irq(&timeout_lock);
  3756. ep = list_entry(tmp, struct c4iw_ep, entry);
  3757. process_timeout(ep);
  3758. spin_lock_irq(&timeout_lock);
  3759. }
  3760. spin_unlock_irq(&timeout_lock);
  3761. }
  3762. static void process_work(struct work_struct *work)
  3763. {
  3764. struct sk_buff *skb = NULL;
  3765. struct c4iw_dev *dev;
  3766. struct cpl_act_establish *rpl;
  3767. unsigned int opcode;
  3768. int ret;
  3769. process_timedout_eps();
  3770. while ((skb = skb_dequeue(&rxq))) {
  3771. rpl = cplhdr(skb);
  3772. dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
  3773. opcode = rpl->ot.opcode;
  3774. BUG_ON(!work_handlers[opcode]);
  3775. ret = work_handlers[opcode](dev, skb);
  3776. if (!ret)
  3777. kfree_skb(skb);
  3778. process_timedout_eps();
  3779. }
  3780. }
  3781. static DECLARE_WORK(skb_work, process_work);
  3782. static void ep_timeout(unsigned long arg)
  3783. {
  3784. struct c4iw_ep *ep = (struct c4iw_ep *)arg;
  3785. int kickit = 0;
  3786. spin_lock(&timeout_lock);
  3787. if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
  3788. /*
  3789. * Only insert if it is not already on the list.
  3790. */
  3791. if (!ep->entry.next) {
  3792. list_add_tail(&ep->entry, &timeout_list);
  3793. kickit = 1;
  3794. }
  3795. }
  3796. spin_unlock(&timeout_lock);
  3797. if (kickit)
  3798. queue_work(workq, &skb_work);
  3799. }
  3800. /*
  3801. * All the CM events are handled on a work queue to have a safe context.
  3802. */
  3803. static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
  3804. {
  3805. /*
  3806. * Save dev in the skb->cb area.
  3807. */
  3808. *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
  3809. /*
  3810. * Queue the skb and schedule the worker thread.
  3811. */
  3812. skb_queue_tail(&rxq, skb);
  3813. queue_work(workq, &skb_work);
  3814. return 0;
  3815. }
  3816. static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
  3817. {
  3818. struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
  3819. if (rpl->status != CPL_ERR_NONE) {
  3820. printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
  3821. "for tid %u\n", rpl->status, GET_TID(rpl));
  3822. }
  3823. kfree_skb(skb);
  3824. return 0;
  3825. }
  3826. static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
  3827. {
  3828. struct cpl_fw6_msg *rpl = cplhdr(skb);
  3829. struct c4iw_wr_wait *wr_waitp;
  3830. int ret;
  3831. PDBG("%s type %u\n", __func__, rpl->type);
  3832. switch (rpl->type) {
  3833. case FW6_TYPE_WR_RPL:
  3834. ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
  3835. wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
  3836. PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
  3837. if (wr_waitp)
  3838. c4iw_wake_up(wr_waitp, ret ? -ret : 0);
  3839. kfree_skb(skb);
  3840. break;
  3841. case FW6_TYPE_CQE:
  3842. case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
  3843. sched(dev, skb);
  3844. break;
  3845. default:
  3846. printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
  3847. rpl->type);
  3848. kfree_skb(skb);
  3849. break;
  3850. }
  3851. return 0;
  3852. }
  3853. static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
  3854. {
  3855. struct cpl_abort_req_rss *req = cplhdr(skb);
  3856. struct c4iw_ep *ep;
  3857. unsigned int tid = GET_TID(req);
  3858. ep = get_ep_from_tid(dev, tid);
  3859. /* This EP will be dereferenced in peer_abort() */
  3860. if (!ep) {
  3861. printk(KERN_WARNING MOD
  3862. "Abort on non-existent endpoint, tid %d\n", tid);
  3863. kfree_skb(skb);
  3864. return 0;
  3865. }
  3866. if (is_neg_adv(req->status)) {
  3867. PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
  3868. __func__, ep->hwtid, req->status,
  3869. neg_adv_str(req->status));
  3870. goto out;
  3871. }
  3872. PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
  3873. ep->com.state);
  3874. c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
  3875. out:
  3876. sched(dev, skb);
  3877. return 0;
  3878. }
  3879. /*
  3880. * Most upcalls from the T4 Core go to sched() to
  3881. * schedule the processing on a work queue.
  3882. */
  3883. c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
  3884. [CPL_ACT_ESTABLISH] = sched,
  3885. [CPL_ACT_OPEN_RPL] = sched,
  3886. [CPL_RX_DATA] = sched,
  3887. [CPL_ABORT_RPL_RSS] = sched,
  3888. [CPL_ABORT_RPL] = sched,
  3889. [CPL_PASS_OPEN_RPL] = sched,
  3890. [CPL_CLOSE_LISTSRV_RPL] = sched,
  3891. [CPL_PASS_ACCEPT_REQ] = sched,
  3892. [CPL_PASS_ESTABLISH] = sched,
  3893. [CPL_PEER_CLOSE] = sched,
  3894. [CPL_CLOSE_CON_RPL] = sched,
  3895. [CPL_ABORT_REQ_RSS] = peer_abort_intr,
  3896. [CPL_RDMA_TERMINATE] = sched,
  3897. [CPL_FW4_ACK] = sched,
  3898. [CPL_SET_TCB_RPL] = set_tcb_rpl,
  3899. [CPL_FW6_MSG] = fw6_msg,
  3900. [CPL_RX_PKT] = sched
  3901. };
  3902. int __init c4iw_cm_init(void)
  3903. {
  3904. spin_lock_init(&timeout_lock);
  3905. skb_queue_head_init(&rxq);
  3906. workq = create_singlethread_workqueue("iw_cxgb4");
  3907. if (!workq)
  3908. return -ENOMEM;
  3909. return 0;
  3910. }
  3911. void c4iw_cm_term(void)
  3912. {
  3913. WARN_ON(!list_empty(&timeout_list));
  3914. flush_workqueue(workq);
  3915. destroy_workqueue(workq);
  3916. }