1/* 2 * Copyright (c) 2006 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/slab.h> 35#include <linux/workqueue.h> 36#include <linux/skbuff.h> 37#include <linux/timer.h> 38#include <linux/notifier.h> 39#include <linux/inetdevice.h> 40 41#include <net/neighbour.h> 42#include <net/netevent.h> 43#include <net/route.h> 44 45#include "tcb.h" 46#include "cxgb3_offload.h" 47#include "iwch.h" 48#include "iwch_provider.h" 49#include "iwch_cm.h" 50 51static 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 67int peer2peer = 0; 68module_param(peer2peer, int, 0644); 69MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)"); 70 71static int ep_timeout_secs = 60; 72module_param(ep_timeout_secs, int, 0644); 73MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout " 74 "in seconds (default=60)"); 75 76static int mpa_rev = 1; 77module_param(mpa_rev, int, 0644); 78MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, " 79 "1 is spec compliant. (default=1)"); 80 81static int markers_enabled = 0; 82module_param(markers_enabled, int, 0644); 83MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)"); 84 85static int crc_enabled = 1; 86module_param(crc_enabled, int, 0644); 87MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)"); 88 89static int rcv_win = 256 * 1024; 90module_param(rcv_win, int, 0644); 91MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256)"); 92 93static int snd_win = 32 * 1024; 94module_param(snd_win, int, 0644); 95MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)"); 96 97static unsigned int nocong = 0; 98module_param(nocong, uint, 0644); 99MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)"); 100 101static unsigned int cong_flavor = 1; 102module_param(cong_flavor, uint, 0644); 103MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)"); 104 105static struct workqueue_struct *workq; 106 107static struct sk_buff_head rxq; 108 109static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp); 110static void ep_timeout(unsigned long arg); 111static void connect_reply_upcall(struct iwch_ep *ep, int status); 112 113static void start_ep_timer(struct iwch_ep *ep) 114{ 115 PDBG("%s ep %p\n", __func__, ep); 116 if (timer_pending(&ep->timer)) { 117 PDBG("%s stopped / restarted timer ep %p\n", __func__, ep); 118 del_timer_sync(&ep->timer); 119 } else 120 get_ep(&ep->com); 121 ep->timer.expires = jiffies + ep_timeout_secs * HZ; 122 ep->timer.data = (unsigned long)ep; 123 ep->timer.function = ep_timeout; 124 add_timer(&ep->timer); 125} 126 127static void stop_ep_timer(struct iwch_ep *ep) 128{ 129 PDBG("%s ep %p\n", __func__, ep); 130 if (!timer_pending(&ep->timer)) { 131 WARN(1, "%s timer stopped when its not running! ep %p state %u\n", 132 __func__, ep, ep->com.state); 133 return; 134 } 135 del_timer_sync(&ep->timer); 136 put_ep(&ep->com); 137} 138 139static int iwch_l2t_send(struct t3cdev *tdev, struct sk_buff *skb, struct l2t_entry *l2e) 140{ 141 int error = 0; 142 struct cxio_rdev *rdev; 143 144 rdev = (struct cxio_rdev *)tdev->ulp; 145 if (cxio_fatal_error(rdev)) { 146 kfree_skb(skb); 147 return -EIO; 148 } 149 error = l2t_send(tdev, skb, l2e); 150 if (error < 0) 151 kfree_skb(skb); 152 return error; 153} 154 155int iwch_cxgb3_ofld_send(struct t3cdev *tdev, struct sk_buff *skb) 156{ 157 int error = 0; 158 struct cxio_rdev *rdev; 159 160 rdev = (struct cxio_rdev *)tdev->ulp; 161 if (cxio_fatal_error(rdev)) { 162 kfree_skb(skb); 163 return -EIO; 164 } 165 error = cxgb3_ofld_send(tdev, skb); 166 if (error < 0) 167 kfree_skb(skb); 168 return error; 169} 170 171static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb) 172{ 173 struct cpl_tid_release *req; 174 175 skb = get_skb(skb, sizeof *req, GFP_KERNEL); 176 if (!skb) 177 return; 178 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req)); 179 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 180 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid)); 181 skb->priority = CPL_PRIORITY_SETUP; 182 iwch_cxgb3_ofld_send(tdev, skb); 183 return; 184} 185 186int iwch_quiesce_tid(struct iwch_ep *ep) 187{ 188 struct cpl_set_tcb_field *req; 189 struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); 190 191 if (!skb) 192 return -ENOMEM; 193 req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); 194 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 195 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); 196 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); 197 req->reply = 0; 198 req->cpu_idx = 0; 199 req->word = htons(W_TCB_RX_QUIESCE); 200 req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); 201 req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE); 202 203 skb->priority = CPL_PRIORITY_DATA; 204 return iwch_cxgb3_ofld_send(ep->com.tdev, skb); 205} 206 207int iwch_resume_tid(struct iwch_ep *ep) 208{ 209 struct cpl_set_tcb_field *req; 210 struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); 211 212 if (!skb) 213 return -ENOMEM; 214 req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); 215 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 216 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); 217 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); 218 req->reply = 0; 219 req->cpu_idx = 0; 220 req->word = htons(W_TCB_RX_QUIESCE); 221 req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); 222 req->val = 0; 223 224 skb->priority = CPL_PRIORITY_DATA; 225 return iwch_cxgb3_ofld_send(ep->com.tdev, skb); 226} 227 228static void set_emss(struct iwch_ep *ep, u16 opt) 229{ 230 PDBG("%s ep %p opt %u\n", __func__, ep, opt); 231 ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40; 232 if (G_TCPOPT_TSTAMP(opt)) 233 ep->emss -= 12; 234 if (ep->emss < 128) 235 ep->emss = 128; 236 PDBG("emss=%d\n", ep->emss); 237} 238 239static enum iwch_ep_state state_read(struct iwch_ep_common *epc) 240{ 241 unsigned long flags; 242 enum iwch_ep_state state; 243 244 spin_lock_irqsave(&epc->lock, flags); 245 state = epc->state; 246 spin_unlock_irqrestore(&epc->lock, flags); 247 return state; 248} 249 250static void __state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) 251{ 252 epc->state = new; 253} 254 255static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) 256{ 257 unsigned long flags; 258 259 spin_lock_irqsave(&epc->lock, flags); 260 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]); 261 __state_set(epc, new); 262 spin_unlock_irqrestore(&epc->lock, flags); 263 return; 264} 265 266static void *alloc_ep(int size, gfp_t gfp) 267{ 268 struct iwch_ep_common *epc; 269 270 epc = kzalloc(size, gfp); 271 if (epc) { 272 kref_init(&epc->kref); 273 spin_lock_init(&epc->lock); 274 init_waitqueue_head(&epc->waitq); 275 } 276 PDBG("%s alloc ep %p\n", __func__, epc); 277 return epc; 278} 279 280void __free_ep(struct kref *kref) 281{ 282 struct iwch_ep *ep; 283 ep = container_of(container_of(kref, struct iwch_ep_common, kref), 284 struct iwch_ep, com); 285 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]); 286 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) { 287 cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid); 288 dst_release(ep->dst); 289 l2t_release(ep->com.tdev, ep->l2t); 290 } 291 kfree(ep); 292} 293 294static void release_ep_resources(struct iwch_ep *ep) 295{ 296 PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); 297 set_bit(RELEASE_RESOURCES, &ep->com.flags); 298 put_ep(&ep->com); 299} 300 301static int status2errno(int status) 302{ 303 switch (status) { 304 case CPL_ERR_NONE: 305 return 0; 306 case CPL_ERR_CONN_RESET: 307 return -ECONNRESET; 308 case CPL_ERR_ARP_MISS: 309 return -EHOSTUNREACH; 310 case CPL_ERR_CONN_TIMEDOUT: 311 return -ETIMEDOUT; 312 case CPL_ERR_TCAM_FULL: 313 return -ENOMEM; 314 case CPL_ERR_CONN_EXIST: 315 return -EADDRINUSE; 316 default: 317 return -EIO; 318 } 319} 320 321/* 322 * Try and reuse skbs already allocated... 323 */ 324static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp) 325{ 326 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) { 327 skb_trim(skb, 0); 328 skb_get(skb); 329 } else { 330 skb = alloc_skb(len, gfp); 331 } 332 return skb; 333} 334 335static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip, 336 __be32 peer_ip, __be16 local_port, 337 __be16 peer_port, u8 tos) 338{ 339 struct rtable *rt; 340 struct flowi4 fl4; 341 342 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip, 343 peer_port, local_port, IPPROTO_TCP, 344 tos, 0); 345 if (IS_ERR(rt)) 346 return NULL; 347 return rt; 348} 349 350static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu) 351{ 352 int i = 0; 353 354 while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu) 355 ++i; 356 return i; 357} 358 359static void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb) 360{ 361 PDBG("%s t3cdev %p\n", __func__, dev); 362 kfree_skb(skb); 363} 364 365/* 366 * Handle an ARP failure for an active open. 367 */ 368static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb) 369{ 370 printk(KERN_ERR MOD "ARP failure duing connect\n"); 371 kfree_skb(skb); 372} 373 374/* 375 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant 376 * and send it along. 377 */ 378static void abort_arp_failure(struct t3cdev *dev, struct sk_buff *skb) 379{ 380 struct cpl_abort_req *req = cplhdr(skb); 381 382 PDBG("%s t3cdev %p\n", __func__, dev); 383 req->cmd = CPL_ABORT_NO_RST; 384 iwch_cxgb3_ofld_send(dev, skb); 385} 386 387static int send_halfclose(struct iwch_ep *ep, gfp_t gfp) 388{ 389 struct cpl_close_con_req *req; 390 struct sk_buff *skb; 391 392 PDBG("%s ep %p\n", __func__, ep); 393 skb = get_skb(NULL, sizeof(*req), gfp); 394 if (!skb) { 395 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); 396 return -ENOMEM; 397 } 398 skb->priority = CPL_PRIORITY_DATA; 399 set_arp_failure_handler(skb, arp_failure_discard); 400 req = (struct cpl_close_con_req *) skb_put(skb, sizeof(*req)); 401 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); 402 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); 403 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid)); 404 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); 405} 406 407static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) 408{ 409 struct cpl_abort_req *req; 410 411 PDBG("%s ep %p\n", __func__, ep); 412 skb = get_skb(skb, sizeof(*req), gfp); 413 if (!skb) { 414 printk(KERN_ERR MOD "%s - failed to alloc skb.\n", 415 __func__); 416 return -ENOMEM; 417 } 418 skb->priority = CPL_PRIORITY_DATA; 419 set_arp_failure_handler(skb, abort_arp_failure); 420 req = (struct cpl_abort_req *) skb_put(skb, sizeof(*req)); 421 memset(req, 0, sizeof(*req)); 422 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); 423 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); 424 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid)); 425 req->cmd = CPL_ABORT_SEND_RST; 426 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); 427} 428 429static int send_connect(struct iwch_ep *ep) 430{ 431 struct cpl_act_open_req *req; 432 struct sk_buff *skb; 433 u32 opt0h, opt0l, opt2; 434 unsigned int mtu_idx; 435 int wscale; 436 437 PDBG("%s ep %p\n", __func__, ep); 438 439 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); 440 if (!skb) { 441 printk(KERN_ERR MOD "%s - failed to alloc skb.\n", 442 __func__); 443 return -ENOMEM; 444 } 445 mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); 446 wscale = compute_wscale(rcv_win); 447 opt0h = V_NAGLE(0) | 448 V_NO_CONG(nocong) | 449 V_KEEP_ALIVE(1) | 450 F_TCAM_BYPASS | 451 V_WND_SCALE(wscale) | 452 V_MSS_IDX(mtu_idx) | 453 V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); 454 opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); 455 opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) | 456 V_CONG_CONTROL_FLAVOR(cong_flavor); 457 skb->priority = CPL_PRIORITY_SETUP; 458 set_arp_failure_handler(skb, act_open_req_arp_failure); 459 460 req = (struct cpl_act_open_req *) skb_put(skb, sizeof(*req)); 461 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 462 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ep->atid)); 463 req->local_port = ep->com.local_addr.sin_port; 464 req->peer_port = ep->com.remote_addr.sin_port; 465 req->local_ip = ep->com.local_addr.sin_addr.s_addr; 466 req->peer_ip = ep->com.remote_addr.sin_addr.s_addr; 467 req->opt0h = htonl(opt0h); 468 req->opt0l = htonl(opt0l); 469 req->params = 0; 470 req->opt2 = htonl(opt2); 471 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); 472} 473 474static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb) 475{ 476 int mpalen; 477 struct tx_data_wr *req; 478 struct mpa_message *mpa; 479 int len; 480 481 PDBG("%s ep %p pd_len %d\n", __func__, ep, ep->plen); 482 483 BUG_ON(skb_cloned(skb)); 484 485 mpalen = sizeof(*mpa) + ep->plen; 486 if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) { 487 kfree_skb(skb); 488 skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL); 489 if (!skb) { 490 connect_reply_upcall(ep, -ENOMEM); 491 return; 492 } 493 } 494 skb_trim(skb, 0); 495 skb_reserve(skb, sizeof(*req)); 496 skb_put(skb, mpalen); 497 skb->priority = CPL_PRIORITY_DATA; 498 mpa = (struct mpa_message *) skb->data; 499 memset(mpa, 0, sizeof(*mpa)); 500 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)); 501 mpa->flags = (crc_enabled ? MPA_CRC : 0) | 502 (markers_enabled ? MPA_MARKERS : 0); 503 mpa->private_data_size = htons(ep->plen); 504 mpa->revision = mpa_rev; 505 506 if (ep->plen) 507 memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen); 508 509 /* 510 * Reference the mpa skb. This ensures the data area 511 * will remain in memory until the hw acks the tx. 512 * Function tx_ack() will deref it. 513 */ 514 skb_get(skb); 515 set_arp_failure_handler(skb, arp_failure_discard); 516 skb_reset_transport_header(skb); 517 len = skb->len; 518 req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); 519 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); 520 req->wr_lo = htonl(V_WR_TID(ep->hwtid)); 521 req->len = htonl(len); 522 req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | 523 V_TX_SNDBUF(snd_win>>15)); 524 req->flags = htonl(F_TX_INIT); 525 req->sndseq = htonl(ep->snd_seq); 526 BUG_ON(ep->mpa_skb); 527 ep->mpa_skb = skb; 528 iwch_l2t_send(ep->com.tdev, skb, ep->l2t); 529 start_ep_timer(ep); 530 state_set(&ep->com, MPA_REQ_SENT); 531 return; 532} 533 534static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen) 535{ 536 int mpalen; 537 struct tx_data_wr *req; 538 struct mpa_message *mpa; 539 struct sk_buff *skb; 540 541 PDBG("%s ep %p plen %d\n", __func__, ep, plen); 542 543 mpalen = sizeof(*mpa) + plen; 544 545 skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); 546 if (!skb) { 547 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); 548 return -ENOMEM; 549 } 550 skb_reserve(skb, sizeof(*req)); 551 mpa = (struct mpa_message *) skb_put(skb, mpalen); 552 memset(mpa, 0, sizeof(*mpa)); 553 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); 554 mpa->flags = MPA_REJECT; 555 mpa->revision = mpa_rev; 556 mpa->private_data_size = htons(plen); 557 if (plen) 558 memcpy(mpa->private_data, pdata, plen); 559 560 /* 561 * Reference the mpa skb again. This ensures the data area 562 * will remain in memory until the hw acks the tx. 563 * Function tx_ack() will deref it. 564 */ 565 skb_get(skb); 566 skb->priority = CPL_PRIORITY_DATA; 567 set_arp_failure_handler(skb, arp_failure_discard); 568 skb_reset_transport_header(skb); 569 req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); 570 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); 571 req->wr_lo = htonl(V_WR_TID(ep->hwtid)); 572 req->len = htonl(mpalen); 573 req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | 574 V_TX_SNDBUF(snd_win>>15)); 575 req->flags = htonl(F_TX_INIT); 576 req->sndseq = htonl(ep->snd_seq); 577 BUG_ON(ep->mpa_skb); 578 ep->mpa_skb = skb; 579 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); 580} 581 582static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen) 583{ 584 int mpalen; 585 struct tx_data_wr *req; 586 struct mpa_message *mpa; 587 int len; 588 struct sk_buff *skb; 589 590 PDBG("%s ep %p plen %d\n", __func__, ep, plen); 591 592 mpalen = sizeof(*mpa) + plen; 593 594 skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); 595 if (!skb) { 596 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); 597 return -ENOMEM; 598 } 599 skb->priority = CPL_PRIORITY_DATA; 600 skb_reserve(skb, sizeof(*req)); 601 mpa = (struct mpa_message *) skb_put(skb, mpalen); 602 memset(mpa, 0, sizeof(*mpa)); 603 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); 604 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) | 605 (markers_enabled ? MPA_MARKERS : 0); 606 mpa->revision = mpa_rev; 607 mpa->private_data_size = htons(plen); 608 if (plen) 609 memcpy(mpa->private_data, pdata, plen); 610 611 /* 612 * Reference the mpa skb. This ensures the data area 613 * will remain in memory until the hw acks the tx. 614 * Function tx_ack() will deref it. 615 */ 616 skb_get(skb); 617 set_arp_failure_handler(skb, arp_failure_discard); 618 skb_reset_transport_header(skb); 619 len = skb->len; 620 req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); 621 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); 622 req->wr_lo = htonl(V_WR_TID(ep->hwtid)); 623 req->len = htonl(len); 624 req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | 625 V_TX_SNDBUF(snd_win>>15)); 626 req->flags = htonl(F_TX_INIT); 627 req->sndseq = htonl(ep->snd_seq); 628 ep->mpa_skb = skb; 629 state_set(&ep->com, MPA_REP_SENT); 630 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); 631} 632 633static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 634{ 635 struct iwch_ep *ep = ctx; 636 struct cpl_act_establish *req = cplhdr(skb); 637 unsigned int tid = GET_TID(req); 638 639 PDBG("%s ep %p tid %d\n", __func__, ep, tid); 640 641 dst_confirm(ep->dst); 642 643 /* setup the hwtid for this connection */ 644 ep->hwtid = tid; 645 cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid); 646 647 ep->snd_seq = ntohl(req->snd_isn); 648 ep->rcv_seq = ntohl(req->rcv_isn); 649 650 set_emss(ep, ntohs(req->tcp_opt)); 651 652 /* dealloc the atid */ 653 cxgb3_free_atid(ep->com.tdev, ep->atid); 654 655 /* start MPA negotiation */ 656 send_mpa_req(ep, skb); 657 658 return 0; 659} 660 661static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) 662{ 663 PDBG("%s ep %p\n", __FILE__, ep); 664 state_set(&ep->com, ABORTING); 665 send_abort(ep, skb, gfp); 666} 667 668static void close_complete_upcall(struct iwch_ep *ep) 669{ 670 struct iw_cm_event event; 671 672 PDBG("%s ep %p\n", __func__, ep); 673 memset(&event, 0, sizeof(event)); 674 event.event = IW_CM_EVENT_CLOSE; 675 if (ep->com.cm_id) { 676 PDBG("close complete delivered ep %p cm_id %p tid %d\n", 677 ep, ep->com.cm_id, ep->hwtid); 678 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 679 ep->com.cm_id->rem_ref(ep->com.cm_id); 680 ep->com.cm_id = NULL; 681 ep->com.qp = NULL; 682 } 683} 684 685static void peer_close_upcall(struct iwch_ep *ep) 686{ 687 struct iw_cm_event event; 688 689 PDBG("%s ep %p\n", __func__, ep); 690 memset(&event, 0, sizeof(event)); 691 event.event = IW_CM_EVENT_DISCONNECT; 692 if (ep->com.cm_id) { 693 PDBG("peer close delivered ep %p cm_id %p tid %d\n", 694 ep, ep->com.cm_id, ep->hwtid); 695 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 696 } 697} 698 699static void peer_abort_upcall(struct iwch_ep *ep) 700{ 701 struct iw_cm_event event; 702 703 PDBG("%s ep %p\n", __func__, ep); 704 memset(&event, 0, sizeof(event)); 705 event.event = IW_CM_EVENT_CLOSE; 706 event.status = -ECONNRESET; 707 if (ep->com.cm_id) { 708 PDBG("abort delivered ep %p cm_id %p tid %d\n", ep, 709 ep->com.cm_id, ep->hwtid); 710 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 711 ep->com.cm_id->rem_ref(ep->com.cm_id); 712 ep->com.cm_id = NULL; 713 ep->com.qp = NULL; 714 } 715} 716 717static void connect_reply_upcall(struct iwch_ep *ep, int status) 718{ 719 struct iw_cm_event event; 720 721 PDBG("%s ep %p status %d\n", __func__, ep, status); 722 memset(&event, 0, sizeof(event)); 723 event.event = IW_CM_EVENT_CONNECT_REPLY; 724 event.status = status; 725 memcpy(&event.local_addr, &ep->com.local_addr, 726 sizeof(ep->com.local_addr)); 727 memcpy(&event.remote_addr, &ep->com.remote_addr, 728 sizeof(ep->com.remote_addr)); 729 730 if ((status == 0) || (status == -ECONNREFUSED)) { 731 event.private_data_len = ep->plen; 732 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); 733 } 734 if (ep->com.cm_id) { 735 PDBG("%s ep %p tid %d status %d\n", __func__, ep, 736 ep->hwtid, status); 737 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 738 } 739 if (status < 0) { 740 ep->com.cm_id->rem_ref(ep->com.cm_id); 741 ep->com.cm_id = NULL; 742 ep->com.qp = NULL; 743 } 744} 745 746static void connect_request_upcall(struct iwch_ep *ep) 747{ 748 struct iw_cm_event event; 749 750 PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); 751 memset(&event, 0, sizeof(event)); 752 event.event = IW_CM_EVENT_CONNECT_REQUEST; 753 memcpy(&event.local_addr, &ep->com.local_addr, 754 sizeof(ep->com.local_addr)); 755 memcpy(&event.remote_addr, &ep->com.remote_addr, 756 sizeof(ep->com.local_addr)); 757 event.private_data_len = ep->plen; 758 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); 759 event.provider_data = ep; 760 /* 761 * Until ird/ord negotiation via MPAv2 support is added, send max 762 * supported values 763 */ 764 event.ird = event.ord = 8; 765 if (state_read(&ep->parent_ep->com) != DEAD) { 766 get_ep(&ep->com); 767 ep->parent_ep->com.cm_id->event_handler( 768 ep->parent_ep->com.cm_id, 769 &event); 770 } 771 put_ep(&ep->parent_ep->com); 772 ep->parent_ep = NULL; 773} 774 775static void established_upcall(struct iwch_ep *ep) 776{ 777 struct iw_cm_event event; 778 779 PDBG("%s ep %p\n", __func__, ep); 780 memset(&event, 0, sizeof(event)); 781 event.event = IW_CM_EVENT_ESTABLISHED; 782 /* 783 * Until ird/ord negotiation via MPAv2 support is added, send max 784 * supported values 785 */ 786 event.ird = event.ord = 8; 787 if (ep->com.cm_id) { 788 PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); 789 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 790 } 791} 792 793static int update_rx_credits(struct iwch_ep *ep, u32 credits) 794{ 795 struct cpl_rx_data_ack *req; 796 struct sk_buff *skb; 797 798 PDBG("%s ep %p credits %u\n", __func__, ep, credits); 799 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); 800 if (!skb) { 801 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n"); 802 return 0; 803 } 804 805 req = (struct cpl_rx_data_ack *) skb_put(skb, sizeof(*req)); 806 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 807 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid)); 808 req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1)); 809 skb->priority = CPL_PRIORITY_ACK; 810 iwch_cxgb3_ofld_send(ep->com.tdev, skb); 811 return credits; 812} 813 814static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb) 815{ 816 struct mpa_message *mpa; 817 u16 plen; 818 struct iwch_qp_attributes attrs; 819 enum iwch_qp_attr_mask mask; 820 int err; 821 822 PDBG("%s ep %p\n", __func__, ep); 823 824 /* 825 * Stop mpa timer. If it expired, then the state has 826 * changed and we bail since ep_timeout already aborted 827 * the connection. 828 */ 829 stop_ep_timer(ep); 830 if (state_read(&ep->com) != MPA_REQ_SENT) 831 return; 832 833 /* 834 * If we get more than the supported amount of private data 835 * then we must fail this connection. 836 */ 837 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { 838 err = -EINVAL; 839 goto err; 840 } 841 842 /* 843 * copy the new data into our accumulation buffer. 844 */ 845 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), 846 skb->len); 847 ep->mpa_pkt_len += skb->len; 848 849 /* 850 * if we don't even have the mpa message, then bail. 851 */ 852 if (ep->mpa_pkt_len < sizeof(*mpa)) 853 return; 854 mpa = (struct mpa_message *) ep->mpa_pkt; 855 856 /* Validate MPA header. */ 857 if (mpa->revision != mpa_rev) { 858 err = -EPROTO; 859 goto err; 860 } 861 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) { 862 err = -EPROTO; 863 goto err; 864 } 865 866 plen = ntohs(mpa->private_data_size); 867 868 /* 869 * Fail if there's too much private data. 870 */ 871 if (plen > MPA_MAX_PRIVATE_DATA) { 872 err = -EPROTO; 873 goto err; 874 } 875 876 /* 877 * If plen does not account for pkt size 878 */ 879 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { 880 err = -EPROTO; 881 goto err; 882 } 883 884 ep->plen = (u8) plen; 885 886 /* 887 * If we don't have all the pdata yet, then bail. 888 * We'll continue process when more data arrives. 889 */ 890 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) 891 return; 892 893 if (mpa->flags & MPA_REJECT) { 894 err = -ECONNREFUSED; 895 goto err; 896 } 897 898 /* 899 * If we get here we have accumulated the entire mpa 900 * start reply message including private data. And 901 * the MPA header is valid. 902 */ 903 state_set(&ep->com, FPDU_MODE); 904 ep->mpa_attr.initiator = 1; 905 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; 906 ep->mpa_attr.recv_marker_enabled = markers_enabled; 907 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; 908 ep->mpa_attr.version = mpa_rev; 909 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " 910 "xmit_marker_enabled=%d, version=%d\n", __func__, 911 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, 912 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); 913 914 attrs.mpa_attr = ep->mpa_attr; 915 attrs.max_ird = ep->ird; 916 attrs.max_ord = ep->ord; 917 attrs.llp_stream_handle = ep; 918 attrs.next_state = IWCH_QP_STATE_RTS; 919 920 mask = IWCH_QP_ATTR_NEXT_STATE | 921 IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR | 922 IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD; 923 924 /* bind QP and TID with INIT_WR */ 925 err = iwch_modify_qp(ep->com.qp->rhp, 926 ep->com.qp, mask, &attrs, 1); 927 if (err) 928 goto err; 929 930 if (peer2peer && iwch_rqes_posted(ep->com.qp) == 0) { 931 iwch_post_zb_read(ep); 932 } 933 934 goto out; 935err: 936 abort_connection(ep, skb, GFP_KERNEL); 937out: 938 connect_reply_upcall(ep, err); 939 return; 940} 941 942static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb) 943{ 944 struct mpa_message *mpa; 945 u16 plen; 946 947 PDBG("%s ep %p\n", __func__, ep); 948 949 /* 950 * Stop mpa timer. If it expired, then the state has 951 * changed and we bail since ep_timeout already aborted 952 * the connection. 953 */ 954 stop_ep_timer(ep); 955 if (state_read(&ep->com) != MPA_REQ_WAIT) 956 return; 957 958 /* 959 * If we get more than the supported amount of private data 960 * then we must fail this connection. 961 */ 962 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { 963 abort_connection(ep, skb, GFP_KERNEL); 964 return; 965 } 966 967 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); 968 969 /* 970 * Copy the new data into our accumulation buffer. 971 */ 972 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), 973 skb->len); 974 ep->mpa_pkt_len += skb->len; 975 976 /* 977 * If we don't even have the mpa message, then bail. 978 * We'll continue process when more data arrives. 979 */ 980 if (ep->mpa_pkt_len < sizeof(*mpa)) 981 return; 982 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); 983 mpa = (struct mpa_message *) ep->mpa_pkt; 984 985 /* 986 * Validate MPA Header. 987 */ 988 if (mpa->revision != mpa_rev) { 989 abort_connection(ep, skb, GFP_KERNEL); 990 return; 991 } 992 993 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) { 994 abort_connection(ep, skb, GFP_KERNEL); 995 return; 996 } 997 998 plen = ntohs(mpa->private_data_size); 999 1000 /* 1001 * Fail if there's too much private data. 1002 */ 1003 if (plen > MPA_MAX_PRIVATE_DATA) { 1004 abort_connection(ep, skb, GFP_KERNEL); 1005 return; 1006 } 1007 1008 /* 1009 * If plen does not account for pkt size 1010 */ 1011 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { 1012 abort_connection(ep, skb, GFP_KERNEL); 1013 return; 1014 } 1015 ep->plen = (u8) plen; 1016 1017 /* 1018 * If we don't have all the pdata yet, then bail. 1019 */ 1020 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) 1021 return; 1022 1023 /* 1024 * If we get here we have accumulated the entire mpa 1025 * start reply message including private data. 1026 */ 1027 ep->mpa_attr.initiator = 0; 1028 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; 1029 ep->mpa_attr.recv_marker_enabled = markers_enabled; 1030 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; 1031 ep->mpa_attr.version = mpa_rev; 1032 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " 1033 "xmit_marker_enabled=%d, version=%d\n", __func__, 1034 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, 1035 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); 1036 1037 state_set(&ep->com, MPA_REQ_RCVD); 1038 1039 /* drive upcall */ 1040 connect_request_upcall(ep); 1041 return; 1042} 1043 1044static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 1045{ 1046 struct iwch_ep *ep = ctx; 1047 struct cpl_rx_data *hdr = cplhdr(skb); 1048 unsigned int dlen = ntohs(hdr->len); 1049 1050 PDBG("%s ep %p dlen %u\n", __func__, ep, dlen); 1051 1052 skb_pull(skb, sizeof(*hdr)); 1053 skb_trim(skb, dlen); 1054 1055 ep->rcv_seq += dlen; 1056 BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen)); 1057 1058 switch (state_read(&ep->com)) { 1059 case MPA_REQ_SENT: 1060 process_mpa_reply(ep, skb); 1061 break; 1062 case MPA_REQ_WAIT: 1063 process_mpa_request(ep, skb); 1064 break; 1065 case MPA_REP_SENT: 1066 break; 1067 default: 1068 printk(KERN_ERR MOD "%s Unexpected streaming data." 1069 " ep %p state %d tid %d\n", 1070 __func__, ep, state_read(&ep->com), ep->hwtid); 1071 1072 /* 1073 * The ep will timeout and inform the ULP of the failure. 1074 * See ep_timeout(). 1075 */ 1076 break; 1077 } 1078 1079 /* update RX credits */ 1080 update_rx_credits(ep, dlen); 1081 1082 return CPL_RET_BUF_DONE; 1083} 1084 1085/* 1086 * Upcall from the adapter indicating data has been transmitted. 1087 * For us its just the single MPA request or reply. We can now free 1088 * the skb holding the mpa message. 1089 */ 1090static int tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 1091{ 1092 struct iwch_ep *ep = ctx; 1093 struct cpl_wr_ack *hdr = cplhdr(skb); 1094 unsigned int credits = ntohs(hdr->credits); 1095 unsigned long flags; 1096 int post_zb = 0; 1097 1098 PDBG("%s ep %p credits %u\n", __func__, ep, credits); 1099 1100 if (credits == 0) { 1101 PDBG("%s 0 credit ack ep %p state %u\n", 1102 __func__, ep, state_read(&ep->com)); 1103 return CPL_RET_BUF_DONE; 1104 } 1105 1106 spin_lock_irqsave(&ep->com.lock, flags); 1107 BUG_ON(credits != 1); 1108 dst_confirm(ep->dst); 1109 if (!ep->mpa_skb) { 1110 PDBG("%s rdma_init wr_ack ep %p state %u\n", 1111 __func__, ep, ep->com.state); 1112 if (ep->mpa_attr.initiator) { 1113 PDBG("%s initiator ep %p state %u\n", 1114 __func__, ep, ep->com.state); 1115 if (peer2peer && ep->com.state == FPDU_MODE) 1116 post_zb = 1; 1117 } else { 1118 PDBG("%s responder ep %p state %u\n", 1119 __func__, ep, ep->com.state); 1120 if (ep->com.state == MPA_REQ_RCVD) { 1121 ep->com.rpl_done = 1; 1122 wake_up(&ep->com.waitq); 1123 } 1124 } 1125 } else { 1126 PDBG("%s lsm ack ep %p state %u freeing skb\n", 1127 __func__, ep, ep->com.state); 1128 kfree_skb(ep->mpa_skb); 1129 ep->mpa_skb = NULL; 1130 } 1131 spin_unlock_irqrestore(&ep->com.lock, flags); 1132 if (post_zb) 1133 iwch_post_zb_read(ep); 1134 return CPL_RET_BUF_DONE; 1135} 1136 1137static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 1138{ 1139 struct iwch_ep *ep = ctx; 1140 unsigned long flags; 1141 int release = 0; 1142 1143 PDBG("%s ep %p\n", __func__, ep); 1144 BUG_ON(!ep); 1145 1146 /* 1147 * We get 2 abort replies from the HW. The first one must 1148 * be ignored except for scribbling that we need one more. 1149 */ 1150 if (!test_and_set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags)) { 1151 return CPL_RET_BUF_DONE; 1152 } 1153 1154 spin_lock_irqsave(&ep->com.lock, flags); 1155 switch (ep->com.state) { 1156 case ABORTING: 1157 close_complete_upcall(ep); 1158 __state_set(&ep->com, DEAD); 1159 release = 1; 1160 break; 1161 default: 1162 printk(KERN_ERR "%s ep %p state %d\n", 1163 __func__, ep, ep->com.state); 1164 break; 1165 } 1166 spin_unlock_irqrestore(&ep->com.lock, flags); 1167 1168 if (release) 1169 release_ep_resources(ep); 1170 return CPL_RET_BUF_DONE; 1171} 1172 1173/* 1174 * Return whether a failed active open has allocated a TID 1175 */ 1176static inline int act_open_has_tid(int status) 1177{ 1178 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST && 1179 status != CPL_ERR_ARP_MISS; 1180} 1181 1182static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 1183{ 1184 struct iwch_ep *ep = ctx; 1185 struct cpl_act_open_rpl *rpl = cplhdr(skb); 1186 1187 PDBG("%s ep %p status %u errno %d\n", __func__, ep, rpl->status, 1188 status2errno(rpl->status)); 1189 connect_reply_upcall(ep, status2errno(rpl->status)); 1190 state_set(&ep->com, DEAD); 1191 if (ep->com.tdev->type != T3A && act_open_has_tid(rpl->status)) 1192 release_tid(ep->com.tdev, GET_TID(rpl), NULL); 1193 cxgb3_free_atid(ep->com.tdev, ep->atid); 1194 dst_release(ep->dst); 1195 l2t_release(ep->com.tdev, ep->l2t); 1196 put_ep(&ep->com); 1197 return CPL_RET_BUF_DONE; 1198} 1199 1200static int listen_start(struct iwch_listen_ep *ep) 1201{ 1202 struct sk_buff *skb; 1203 struct cpl_pass_open_req *req; 1204 1205 PDBG("%s ep %p\n", __func__, ep); 1206 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); 1207 if (!skb) { 1208 printk(KERN_ERR MOD "t3c_listen_start failed to alloc skb!\n"); 1209 return -ENOMEM; 1210 } 1211 1212 req = (struct cpl_pass_open_req *) skb_put(skb, sizeof(*req)); 1213 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 1214 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, ep->stid)); 1215 req->local_port = ep->com.local_addr.sin_port; 1216 req->local_ip = ep->com.local_addr.sin_addr.s_addr; 1217 req->peer_port = 0; 1218 req->peer_ip = 0; 1219 req->peer_netmask = 0; 1220 req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS); 1221 req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10)); 1222 req->opt1 = htonl(V_CONN_POLICY(CPL_CONN_POLICY_ASK)); 1223 1224 skb->priority = 1; 1225 return iwch_cxgb3_ofld_send(ep->com.tdev, skb); 1226} 1227 1228static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 1229{ 1230 struct iwch_listen_ep *ep = ctx; 1231 struct cpl_pass_open_rpl *rpl = cplhdr(skb); 1232 1233 PDBG("%s ep %p status %d error %d\n", __func__, ep, 1234 rpl->status, status2errno(rpl->status)); 1235 ep->com.rpl_err = status2errno(rpl->status); 1236 ep->com.rpl_done = 1; 1237 wake_up(&ep->com.waitq); 1238 1239 return CPL_RET_BUF_DONE; 1240} 1241 1242static int listen_stop(struct iwch_listen_ep *ep) 1243{ 1244 struct sk_buff *skb; 1245 struct cpl_close_listserv_req *req; 1246 1247 PDBG("%s ep %p\n", __func__, ep); 1248 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); 1249 if (!skb) { 1250 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); 1251 return -ENOMEM; 1252 } 1253 req = (struct cpl_close_listserv_req *) skb_put(skb, sizeof(*req)); 1254 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 1255 req->cpu_idx = 0; 1256 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid)); 1257 skb->priority = 1; 1258 return iwch_cxgb3_ofld_send(ep->com.tdev, skb); 1259} 1260 1261static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb, 1262 void *ctx) 1263{ 1264 struct iwch_listen_ep *ep = ctx; 1265 struct cpl_close_listserv_rpl *rpl = cplhdr(skb); 1266 1267 PDBG("%s ep %p\n", __func__, ep); 1268 ep->com.rpl_err = status2errno(rpl->status); 1269 ep->com.rpl_done = 1; 1270 wake_up(&ep->com.waitq); 1271 return CPL_RET_BUF_DONE; 1272} 1273 1274static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb) 1275{ 1276 struct cpl_pass_accept_rpl *rpl; 1277 unsigned int mtu_idx; 1278 u32 opt0h, opt0l, opt2; 1279 int wscale; 1280 1281 PDBG("%s ep %p\n", __func__, ep); 1282 BUG_ON(skb_cloned(skb)); 1283 skb_trim(skb, sizeof(*rpl)); 1284 skb_get(skb); 1285 mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); 1286 wscale = compute_wscale(rcv_win); 1287 opt0h = V_NAGLE(0) | 1288 V_NO_CONG(nocong) | 1289 V_KEEP_ALIVE(1) | 1290 F_TCAM_BYPASS | 1291 V_WND_SCALE(wscale) | 1292 V_MSS_IDX(mtu_idx) | 1293 V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); 1294 opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); 1295 opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) | 1296 V_CONG_CONTROL_FLAVOR(cong_flavor); 1297 1298 rpl = cplhdr(skb); 1299 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 1300 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid)); 1301 rpl->peer_ip = peer_ip; 1302 rpl->opt0h = htonl(opt0h); 1303 rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT); 1304 rpl->opt2 = htonl(opt2); 1305 rpl->rsvd = rpl->opt2; /* workaround for HW bug */ 1306 skb->priority = CPL_PRIORITY_SETUP; 1307 iwch_l2t_send(ep->com.tdev, skb, ep->l2t); 1308 1309 return; 1310} 1311 1312static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip, 1313 struct sk_buff *skb) 1314{ 1315 PDBG("%s t3cdev %p tid %u peer_ip %x\n", __func__, tdev, hwtid, 1316 peer_ip); 1317 BUG_ON(skb_cloned(skb)); 1318 skb_trim(skb, sizeof(struct cpl_tid_release)); 1319 skb_get(skb); 1320 1321 if (tdev->type != T3A) 1322 release_tid(tdev, hwtid, skb); 1323 else { 1324 struct cpl_pass_accept_rpl *rpl; 1325 1326 rpl = cplhdr(skb); 1327 skb->priority = CPL_PRIORITY_SETUP; 1328 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); 1329 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, 1330 hwtid)); 1331 rpl->peer_ip = peer_ip; 1332 rpl->opt0h = htonl(F_TCAM_BYPASS); 1333 rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT); 1334 rpl->opt2 = 0; 1335 rpl->rsvd = rpl->opt2; 1336 iwch_cxgb3_ofld_send(tdev, skb); 1337 } 1338} 1339 1340static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 1341{ 1342 struct iwch_ep *child_ep, *parent_ep = ctx; 1343 struct cpl_pass_accept_req *req = cplhdr(skb); 1344 unsigned int hwtid = GET_TID(req); 1345 struct dst_entry *dst; 1346 struct l2t_entry *l2t; 1347 struct rtable *rt; 1348 struct iff_mac tim; 1349 1350 PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid); 1351 1352 if (state_read(&parent_ep->com) != LISTEN) { 1353 printk(KERN_ERR "%s - listening ep not in LISTEN\n", 1354 __func__); 1355 goto reject; 1356 } 1357 1358 /* 1359 * Find the netdev for this connection request. 1360 */ 1361 tim.mac_addr = req->dst_mac; 1362 tim.vlan_tag = ntohs(req->vlan_tag); 1363 if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) { 1364 printk(KERN_ERR "%s bad dst mac %pM\n", 1365 __func__, req->dst_mac); 1366 goto reject; 1367 } 1368 1369 /* Find output route */ 1370 rt = find_route(tdev, 1371 req->local_ip, 1372 req->peer_ip, 1373 req->local_port, 1374 req->peer_port, G_PASS_OPEN_TOS(ntohl(req->tos_tid))); 1375 if (!rt) { 1376 printk(KERN_ERR MOD "%s - failed to find dst entry!\n", 1377 __func__); 1378 goto reject; 1379 } 1380 dst = &rt->dst; 1381 l2t = t3_l2t_get(tdev, dst, NULL, &req->peer_ip); 1382 if (!l2t) { 1383 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n", 1384 __func__); 1385 dst_release(dst); 1386 goto reject; 1387 } 1388 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL); 1389 if (!child_ep) { 1390 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n", 1391 __func__); 1392 l2t_release(tdev, l2t); 1393 dst_release(dst); 1394 goto reject; 1395 } 1396 state_set(&child_ep->com, CONNECTING); 1397 child_ep->com.tdev = tdev; 1398 child_ep->com.cm_id = NULL; 1399 child_ep->com.local_addr.sin_family = PF_INET; 1400 child_ep->com.local_addr.sin_port = req->local_port; 1401 child_ep->com.local_addr.sin_addr.s_addr = req->local_ip; 1402 child_ep->com.remote_addr.sin_family = PF_INET; 1403 child_ep->com.remote_addr.sin_port = req->peer_port; 1404 child_ep->com.remote_addr.sin_addr.s_addr = req->peer_ip; 1405 get_ep(&parent_ep->com); 1406 child_ep->parent_ep = parent_ep; 1407 child_ep->tos = G_PASS_OPEN_TOS(ntohl(req->tos_tid)); 1408 child_ep->l2t = l2t; 1409 child_ep->dst = dst; 1410 child_ep->hwtid = hwtid; 1411 init_timer(&child_ep->timer); 1412 cxgb3_insert_tid(tdev, &t3c_client, child_ep, hwtid); 1413 accept_cr(child_ep, req->peer_ip, skb); 1414 goto out; 1415reject: 1416 reject_cr(tdev, hwtid, req->peer_ip, skb); 1417out: 1418 return CPL_RET_BUF_DONE; 1419} 1420 1421static int pass_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 1422{ 1423 struct iwch_ep *ep = ctx; 1424 struct cpl_pass_establish *req = cplhdr(skb); 1425 1426 PDBG("%s ep %p\n", __func__, ep); 1427 ep->snd_seq = ntohl(req->snd_isn); 1428 ep->rcv_seq = ntohl(req->rcv_isn); 1429 1430 set_emss(ep, ntohs(req->tcp_opt)); 1431 1432 dst_confirm(ep->dst); 1433 state_set(&ep->com, MPA_REQ_WAIT); 1434 start_ep_timer(ep); 1435 1436 return CPL_RET_BUF_DONE; 1437} 1438 1439static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 1440{ 1441 struct iwch_ep *ep = ctx; 1442 struct iwch_qp_attributes attrs; 1443 unsigned long flags; 1444 int disconnect = 1; 1445 int release = 0; 1446 1447 PDBG("%s ep %p\n", __func__, ep); 1448 dst_confirm(ep->dst); 1449 1450 spin_lock_irqsave(&ep->com.lock, flags); 1451 switch (ep->com.state) { 1452 case MPA_REQ_WAIT: 1453 __state_set(&ep->com, CLOSING); 1454 break; 1455 case MPA_REQ_SENT: 1456 __state_set(&ep->com, CLOSING); 1457 connect_reply_upcall(ep, -ECONNRESET); 1458 break; 1459 case MPA_REQ_RCVD: 1460 1461 /* 1462 * We're gonna mark this puppy DEAD, but keep 1463 * the reference on it until the ULP accepts or 1464 * rejects the CR. Also wake up anyone waiting 1465 * in rdma connection migration (see iwch_accept_cr()). 1466 */ 1467 __state_set(&ep->com, CLOSING); 1468 ep->com.rpl_done = 1; 1469 ep->com.rpl_err = -ECONNRESET; 1470 PDBG("waking up ep %p\n", ep); 1471 wake_up(&ep->com.waitq); 1472 break; 1473 case MPA_REP_SENT: 1474 __state_set(&ep->com, CLOSING); 1475 ep->com.rpl_done = 1; 1476 ep->com.rpl_err = -ECONNRESET; 1477 PDBG("waking up ep %p\n", ep); 1478 wake_up(&ep->com.waitq); 1479 break; 1480 case FPDU_MODE: 1481 start_ep_timer(ep); 1482 __state_set(&ep->com, CLOSING); 1483 attrs.next_state = IWCH_QP_STATE_CLOSING; 1484 iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, 1485 IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); 1486 peer_close_upcall(ep); 1487 break; 1488 case ABORTING: 1489 disconnect = 0; 1490 break; 1491 case CLOSING: 1492 __state_set(&ep->com, MORIBUND); 1493 disconnect = 0; 1494 break; 1495 case MORIBUND: 1496 stop_ep_timer(ep); 1497 if (ep->com.cm_id && ep->com.qp) { 1498 attrs.next_state = IWCH_QP_STATE_IDLE; 1499 iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, 1500 IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); 1501 } 1502 close_complete_upcall(ep); 1503 __state_set(&ep->com, DEAD); 1504 release = 1; 1505 disconnect = 0; 1506 break; 1507 case DEAD: 1508 disconnect = 0; 1509 break; 1510 default: 1511 BUG_ON(1); 1512 } 1513 spin_unlock_irqrestore(&ep->com.lock, flags); 1514 if (disconnect) 1515 iwch_ep_disconnect(ep, 0, GFP_KERNEL); 1516 if (release) 1517 release_ep_resources(ep); 1518 return CPL_RET_BUF_DONE; 1519} 1520 1521/* 1522 * Returns whether an ABORT_REQ_RSS message is a negative advice. 1523 */ 1524static int is_neg_adv_abort(unsigned int status) 1525{ 1526 return status == CPL_ERR_RTX_NEG_ADVICE || 1527 status == CPL_ERR_PERSIST_NEG_ADVICE; 1528} 1529 1530static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 1531{ 1532 struct cpl_abort_req_rss *req = cplhdr(skb); 1533 struct iwch_ep *ep = ctx; 1534 struct cpl_abort_rpl *rpl; 1535 struct sk_buff *rpl_skb; 1536 struct iwch_qp_attributes attrs; 1537 int ret; 1538 int release = 0; 1539 unsigned long flags; 1540 1541 if (is_neg_adv_abort(req->status)) { 1542 PDBG("%s neg_adv_abort ep %p tid %d\n", __func__, ep, 1543 ep->hwtid); 1544 t3_l2t_send_event(ep->com.tdev, ep->l2t); 1545 return CPL_RET_BUF_DONE; 1546 } 1547 1548 /* 1549 * We get 2 peer aborts from the HW. The first one must 1550 * be ignored except for scribbling that we need one more. 1551 */ 1552 if (!test_and_set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags)) { 1553 return CPL_RET_BUF_DONE; 1554 } 1555 1556 spin_lock_irqsave(&ep->com.lock, flags); 1557 PDBG("%s ep %p state %u\n", __func__, ep, ep->com.state); 1558 switch (ep->com.state) { 1559 case CONNECTING: 1560 break; 1561 case MPA_REQ_WAIT: 1562 stop_ep_timer(ep); 1563 break; 1564 case MPA_REQ_SENT: 1565 stop_ep_timer(ep); 1566 connect_reply_upcall(ep, -ECONNRESET); 1567 break; 1568 case MPA_REP_SENT: 1569 ep->com.rpl_done = 1; 1570 ep->com.rpl_err = -ECONNRESET; 1571 PDBG("waking up ep %p\n", ep); 1572 wake_up(&ep->com.waitq); 1573 break; 1574 case MPA_REQ_RCVD: 1575 1576 /* 1577 * We're gonna mark this puppy DEAD, but keep 1578 * the reference on it until the ULP accepts or 1579 * rejects the CR. Also wake up anyone waiting 1580 * in rdma connection migration (see iwch_accept_cr()). 1581 */ 1582 ep->com.rpl_done = 1; 1583 ep->com.rpl_err = -ECONNRESET; 1584 PDBG("waking up ep %p\n", ep); 1585 wake_up(&ep->com.waitq); 1586 break; 1587 case MORIBUND: 1588 case CLOSING: 1589 stop_ep_timer(ep); 1590 /*FALLTHROUGH*/ 1591 case FPDU_MODE: 1592 if (ep->com.cm_id && ep->com.qp) { 1593 attrs.next_state = IWCH_QP_STATE_ERROR; 1594 ret = iwch_modify_qp(ep->com.qp->rhp, 1595 ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, 1596 &attrs, 1); 1597 if (ret) 1598 printk(KERN_ERR MOD 1599 "%s - qp <- error failed!\n", 1600 __func__); 1601 } 1602 peer_abort_upcall(ep); 1603 break; 1604 case ABORTING: 1605 break; 1606 case DEAD: 1607 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__); 1608 spin_unlock_irqrestore(&ep->com.lock, flags); 1609 return CPL_RET_BUF_DONE; 1610 default: 1611 BUG_ON(1); 1612 break; 1613 } 1614 dst_confirm(ep->dst); 1615 if (ep->com.state != ABORTING) { 1616 __state_set(&ep->com, DEAD); 1617 release = 1; 1618 } 1619 spin_unlock_irqrestore(&ep->com.lock, flags); 1620 1621 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL); 1622 if (!rpl_skb) { 1623 printk(KERN_ERR MOD "%s - cannot allocate skb!\n", 1624 __func__); 1625 release = 1; 1626 goto out; 1627 } 1628 rpl_skb->priority = CPL_PRIORITY_DATA; 1629 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl)); 1630 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); 1631 rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); 1632 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid)); 1633 rpl->cmd = CPL_ABORT_NO_RST; 1634 iwch_cxgb3_ofld_send(ep->com.tdev, rpl_skb); 1635out: 1636 if (release) 1637 release_ep_resources(ep); 1638 return CPL_RET_BUF_DONE; 1639} 1640 1641static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 1642{ 1643 struct iwch_ep *ep = ctx; 1644 struct iwch_qp_attributes attrs; 1645 unsigned long flags; 1646 int release = 0; 1647 1648 PDBG("%s ep %p\n", __func__, ep); 1649 BUG_ON(!ep); 1650 1651 /* The cm_id may be null if we failed to connect */ 1652 spin_lock_irqsave(&ep->com.lock, flags); 1653 switch (ep->com.state) { 1654 case CLOSING: 1655 __state_set(&ep->com, MORIBUND); 1656 break; 1657 case MORIBUND: 1658 stop_ep_timer(ep); 1659 if ((ep->com.cm_id) && (ep->com.qp)) { 1660 attrs.next_state = IWCH_QP_STATE_IDLE; 1661 iwch_modify_qp(ep->com.qp->rhp, 1662 ep->com.qp, 1663 IWCH_QP_ATTR_NEXT_STATE, 1664 &attrs, 1); 1665 } 1666 close_complete_upcall(ep); 1667 __state_set(&ep->com, DEAD); 1668 release = 1; 1669 break; 1670 case ABORTING: 1671 case DEAD: 1672 break; 1673 default: 1674 BUG_ON(1); 1675 break; 1676 } 1677 spin_unlock_irqrestore(&ep->com.lock, flags); 1678 if (release) 1679 release_ep_resources(ep); 1680 return CPL_RET_BUF_DONE; 1681} 1682 1683/* 1684 * T3A does 3 things when a TERM is received: 1685 * 1) send up a CPL_RDMA_TERMINATE message with the TERM packet 1686 * 2) generate an async event on the QP with the TERMINATE opcode 1687 * 3) post a TERMINATE opcode cqe into the associated CQ. 1688 * 1689 * For (1), we save the message in the qp for later consumer consumption. 1690 * For (2), we move the QP into TERMINATE, post a QP event and disconnect. 1691 * For (3), we toss the CQE in cxio_poll_cq(). 1692 * 1693 * terminate() handles case (1)... 1694 */ 1695static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 1696{ 1697 struct iwch_ep *ep = ctx; 1698 1699 if (state_read(&ep->com) != FPDU_MODE) 1700 return CPL_RET_BUF_DONE; 1701 1702 PDBG("%s ep %p\n", __func__, ep); 1703 skb_pull(skb, sizeof(struct cpl_rdma_terminate)); 1704 PDBG("%s saving %d bytes of term msg\n", __func__, skb->len); 1705 skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer, 1706 skb->len); 1707 ep->com.qp->attr.terminate_msg_len = skb->len; 1708 ep->com.qp->attr.is_terminate_local = 0; 1709 return CPL_RET_BUF_DONE; 1710} 1711 1712static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 1713{ 1714 struct cpl_rdma_ec_status *rep = cplhdr(skb); 1715 struct iwch_ep *ep = ctx; 1716 1717 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, 1718 rep->status); 1719 if (rep->status) { 1720 struct iwch_qp_attributes attrs; 1721 1722 printk(KERN_ERR MOD "%s BAD CLOSE - Aborting tid %u\n", 1723 __func__, ep->hwtid); 1724 stop_ep_timer(ep); 1725 attrs.next_state = IWCH_QP_STATE_ERROR; 1726 iwch_modify_qp(ep->com.qp->rhp, 1727 ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, 1728 &attrs, 1); 1729 abort_connection(ep, NULL, GFP_KERNEL); 1730 } 1731 return CPL_RET_BUF_DONE; 1732} 1733 1734static void ep_timeout(unsigned long arg) 1735{ 1736 struct iwch_ep *ep = (struct iwch_ep *)arg; 1737 struct iwch_qp_attributes attrs; 1738 unsigned long flags; 1739 int abort = 1; 1740 1741 spin_lock_irqsave(&ep->com.lock, flags); 1742 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid, 1743 ep->com.state); 1744 switch (ep->com.state) { 1745 case MPA_REQ_SENT: 1746 __state_set(&ep->com, ABORTING); 1747 connect_reply_upcall(ep, -ETIMEDOUT); 1748 break; 1749 case MPA_REQ_WAIT: 1750 __state_set(&ep->com, ABORTING); 1751 break; 1752 case CLOSING: 1753 case MORIBUND: 1754 if (ep->com.cm_id && ep->com.qp) { 1755 attrs.next_state = IWCH_QP_STATE_ERROR; 1756 iwch_modify_qp(ep->com.qp->rhp, 1757 ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, 1758 &attrs, 1); 1759 } 1760 __state_set(&ep->com, ABORTING); 1761 break; 1762 default: 1763 WARN(1, "%s unexpected state ep %p state %u\n", 1764 __func__, ep, ep->com.state); 1765 abort = 0; 1766 } 1767 spin_unlock_irqrestore(&ep->com.lock, flags); 1768 if (abort) 1769 abort_connection(ep, NULL, GFP_ATOMIC); 1770 put_ep(&ep->com); 1771} 1772 1773int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 1774{ 1775 int err; 1776 struct iwch_ep *ep = to_ep(cm_id); 1777 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 1778 1779 if (state_read(&ep->com) == DEAD) { 1780 put_ep(&ep->com); 1781 return -ECONNRESET; 1782 } 1783 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); 1784 if (mpa_rev == 0) 1785 abort_connection(ep, NULL, GFP_KERNEL); 1786 else { 1787 err = send_mpa_reject(ep, pdata, pdata_len); 1788 err = iwch_ep_disconnect(ep, 0, GFP_KERNEL); 1789 } 1790 put_ep(&ep->com); 1791 return 0; 1792} 1793 1794int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 1795{ 1796 int err; 1797 struct iwch_qp_attributes attrs; 1798 enum iwch_qp_attr_mask mask; 1799 struct iwch_ep *ep = to_ep(cm_id); 1800 struct iwch_dev *h = to_iwch_dev(cm_id->device); 1801 struct iwch_qp *qp = get_qhp(h, conn_param->qpn); 1802 1803 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 1804 if (state_read(&ep->com) == DEAD) { 1805 err = -ECONNRESET; 1806 goto err; 1807 } 1808 1809 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); 1810 BUG_ON(!qp); 1811 1812 if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) || 1813 (conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) { 1814 abort_connection(ep, NULL, GFP_KERNEL); 1815 err = -EINVAL; 1816 goto err; 1817 } 1818 1819 cm_id->add_ref(cm_id); 1820 ep->com.cm_id = cm_id; 1821 ep->com.qp = qp; 1822 1823 ep->ird = conn_param->ird; 1824 ep->ord = conn_param->ord; 1825 1826 if (peer2peer && ep->ird == 0) 1827 ep->ird = 1; 1828 1829 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord); 1830 1831 /* bind QP to EP and move to RTS */ 1832 attrs.mpa_attr = ep->mpa_attr; 1833 attrs.max_ird = ep->ird; 1834 attrs.max_ord = ep->ord; 1835 attrs.llp_stream_handle = ep; 1836 attrs.next_state = IWCH_QP_STATE_RTS; 1837 1838 /* bind QP and TID with INIT_WR */ 1839 mask = IWCH_QP_ATTR_NEXT_STATE | 1840 IWCH_QP_ATTR_LLP_STREAM_HANDLE | 1841 IWCH_QP_ATTR_MPA_ATTR | 1842 IWCH_QP_ATTR_MAX_IRD | 1843 IWCH_QP_ATTR_MAX_ORD; 1844 1845 err = iwch_modify_qp(ep->com.qp->rhp, 1846 ep->com.qp, mask, &attrs, 1); 1847 if (err) 1848 goto err1; 1849 1850 /* if needed, wait for wr_ack */ 1851 if (iwch_rqes_posted(qp)) { 1852 wait_event(ep->com.waitq, ep->com.rpl_done); 1853 err = ep->com.rpl_err; 1854 if (err) 1855 goto err1; 1856 } 1857 1858 err = send_mpa_reply(ep, conn_param->private_data, 1859 conn_param->private_data_len); 1860 if (err) 1861 goto err1; 1862 1863 1864 state_set(&ep->com, FPDU_MODE); 1865 established_upcall(ep); 1866 put_ep(&ep->com); 1867 return 0; 1868err1: 1869 ep->com.cm_id = NULL; 1870 ep->com.qp = NULL; 1871 cm_id->rem_ref(cm_id); 1872err: 1873 put_ep(&ep->com); 1874 return err; 1875} 1876 1877static int is_loopback_dst(struct iw_cm_id *cm_id) 1878{ 1879 struct net_device *dev; 1880 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr; 1881 1882 dev = ip_dev_find(&init_net, raddr->sin_addr.s_addr); 1883 if (!dev) 1884 return 0; 1885 dev_put(dev); 1886 return 1; 1887} 1888 1889int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 1890{ 1891 struct iwch_dev *h = to_iwch_dev(cm_id->device); 1892 struct iwch_ep *ep; 1893 struct rtable *rt; 1894 int err = 0; 1895 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr; 1896 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr; 1897 1898 if (cm_id->remote_addr.ss_family != PF_INET) { 1899 err = -ENOSYS; 1900 goto out; 1901 } 1902 1903 if (is_loopback_dst(cm_id)) { 1904 err = -ENOSYS; 1905 goto out; 1906 } 1907 1908 ep = alloc_ep(sizeof(*ep), GFP_KERNEL); 1909 if (!ep) { 1910 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); 1911 err = -ENOMEM; 1912 goto out; 1913 } 1914 init_timer(&ep->timer); 1915 ep->plen = conn_param->private_data_len; 1916 if (ep->plen) 1917 memcpy(ep->mpa_pkt + sizeof(struct mpa_message), 1918 conn_param->private_data, ep->plen); 1919 ep->ird = conn_param->ird; 1920 ep->ord = conn_param->ord; 1921 1922 if (peer2peer && ep->ord == 0) 1923 ep->ord = 1; 1924 1925 ep->com.tdev = h->rdev.t3cdev_p; 1926 1927 cm_id->add_ref(cm_id); 1928 ep->com.cm_id = cm_id; 1929 ep->com.qp = get_qhp(h, conn_param->qpn); 1930 BUG_ON(!ep->com.qp); 1931 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn, 1932 ep->com.qp, cm_id); 1933 1934 /* 1935 * Allocate an active TID to initiate a TCP connection. 1936 */ 1937 ep->atid = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep); 1938 if (ep->atid == -1) { 1939 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); 1940 err = -ENOMEM; 1941 goto fail2; 1942 } 1943 1944 /* find a route */ 1945 rt = find_route(h->rdev.t3cdev_p, laddr->sin_addr.s_addr, 1946 raddr->sin_addr.s_addr, laddr->sin_port, 1947 raddr->sin_port, IPTOS_LOWDELAY); 1948 if (!rt) { 1949 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__); 1950 err = -EHOSTUNREACH; 1951 goto fail3; 1952 } 1953 ep->dst = &rt->dst; 1954 ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst, NULL, 1955 &raddr->sin_addr.s_addr); 1956 if (!ep->l2t) { 1957 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__); 1958 err = -ENOMEM; 1959 goto fail4; 1960 } 1961 1962 state_set(&ep->com, CONNECTING); 1963 ep->tos = IPTOS_LOWDELAY; 1964 memcpy(&ep->com.local_addr, &cm_id->local_addr, 1965 sizeof(ep->com.local_addr)); 1966 memcpy(&ep->com.remote_addr, &cm_id->remote_addr, 1967 sizeof(ep->com.remote_addr)); 1968 1969 /* send connect request to rnic */ 1970 err = send_connect(ep); 1971 if (!err) 1972 goto out; 1973 1974 l2t_release(h->rdev.t3cdev_p, ep->l2t); 1975fail4: 1976 dst_release(ep->dst); 1977fail3: 1978 cxgb3_free_atid(ep->com.tdev, ep->atid); 1979fail2: 1980 cm_id->rem_ref(cm_id); 1981 put_ep(&ep->com); 1982out: 1983 return err; 1984} 1985 1986int iwch_create_listen(struct iw_cm_id *cm_id, int backlog) 1987{ 1988 int err = 0; 1989 struct iwch_dev *h = to_iwch_dev(cm_id->device); 1990 struct iwch_listen_ep *ep; 1991 1992 1993 might_sleep(); 1994 1995 if (cm_id->local_addr.ss_family != PF_INET) { 1996 err = -ENOSYS; 1997 goto fail1; 1998 } 1999 2000 ep = alloc_ep(sizeof(*ep), GFP_KERNEL); 2001 if (!ep) { 2002 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); 2003 err = -ENOMEM; 2004 goto fail1; 2005 } 2006 PDBG("%s ep %p\n", __func__, ep); 2007 ep->com.tdev = h->rdev.t3cdev_p; 2008 cm_id->add_ref(cm_id); 2009 ep->com.cm_id = cm_id; 2010 ep->backlog = backlog; 2011 memcpy(&ep->com.local_addr, &cm_id->local_addr, 2012 sizeof(ep->com.local_addr)); 2013 2014 /* 2015 * Allocate a server TID. 2016 */ 2017 ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep); 2018 if (ep->stid == -1) { 2019 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); 2020 err = -ENOMEM; 2021 goto fail2; 2022 } 2023 2024 state_set(&ep->com, LISTEN); 2025 err = listen_start(ep); 2026 if (err) 2027 goto fail3; 2028 2029 /* wait for pass_open_rpl */ 2030 wait_event(ep->com.waitq, ep->com.rpl_done); 2031 err = ep->com.rpl_err; 2032 if (!err) { 2033 cm_id->provider_data = ep; 2034 goto out; 2035 } 2036fail3: 2037 cxgb3_free_stid(ep->com.tdev, ep->stid); 2038fail2: 2039 cm_id->rem_ref(cm_id); 2040 put_ep(&ep->com); 2041fail1: 2042out: 2043 return err; 2044} 2045 2046int iwch_destroy_listen(struct iw_cm_id *cm_id) 2047{ 2048 int err; 2049 struct iwch_listen_ep *ep = to_listen_ep(cm_id); 2050 2051 PDBG("%s ep %p\n", __func__, ep); 2052 2053 might_sleep(); 2054 state_set(&ep->com, DEAD); 2055 ep->com.rpl_done = 0; 2056 ep->com.rpl_err = 0; 2057 err = listen_stop(ep); 2058 if (err) 2059 goto done; 2060 wait_event(ep->com.waitq, ep->com.rpl_done); 2061 cxgb3_free_stid(ep->com.tdev, ep->stid); 2062done: 2063 err = ep->com.rpl_err; 2064 cm_id->rem_ref(cm_id); 2065 put_ep(&ep->com); 2066 return err; 2067} 2068 2069int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp) 2070{ 2071 int ret=0; 2072 unsigned long flags; 2073 int close = 0; 2074 int fatal = 0; 2075 struct t3cdev *tdev; 2076 struct cxio_rdev *rdev; 2077 2078 spin_lock_irqsave(&ep->com.lock, flags); 2079 2080 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep, 2081 states[ep->com.state], abrupt); 2082 2083 tdev = (struct t3cdev *)ep->com.tdev; 2084 rdev = (struct cxio_rdev *)tdev->ulp; 2085 if (cxio_fatal_error(rdev)) { 2086 fatal = 1; 2087 close_complete_upcall(ep); 2088 ep->com.state = DEAD; 2089 } 2090 switch (ep->com.state) { 2091 case MPA_REQ_WAIT: 2092 case MPA_REQ_SENT: 2093 case MPA_REQ_RCVD: 2094 case MPA_REP_SENT: 2095 case FPDU_MODE: 2096 close = 1; 2097 if (abrupt) 2098 ep->com.state = ABORTING; 2099 else { 2100 ep->com.state = CLOSING; 2101 start_ep_timer(ep); 2102 } 2103 set_bit(CLOSE_SENT, &ep->com.flags); 2104 break; 2105 case CLOSING: 2106 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) { 2107 close = 1; 2108 if (abrupt) { 2109 stop_ep_timer(ep); 2110 ep->com.state = ABORTING; 2111 } else 2112 ep->com.state = MORIBUND; 2113 } 2114 break; 2115 case MORIBUND: 2116 case ABORTING: 2117 case DEAD: 2118 PDBG("%s ignoring disconnect ep %p state %u\n", 2119 __func__, ep, ep->com.state); 2120 break; 2121 default: 2122 BUG(); 2123 break; 2124 } 2125 2126 spin_unlock_irqrestore(&ep->com.lock, flags); 2127 if (close) { 2128 if (abrupt) 2129 ret = send_abort(ep, NULL, gfp); 2130 else 2131 ret = send_halfclose(ep, gfp); 2132 if (ret) 2133 fatal = 1; 2134 } 2135 if (fatal) 2136 release_ep_resources(ep); 2137 return ret; 2138} 2139 2140int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, 2141 struct l2t_entry *l2t) 2142{ 2143 struct iwch_ep *ep = ctx; 2144 2145 if (ep->dst != old) 2146 return 0; 2147 2148 PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new, 2149 l2t); 2150 dst_hold(new); 2151 l2t_release(ep->com.tdev, ep->l2t); 2152 ep->l2t = l2t; 2153 dst_release(old); 2154 ep->dst = new; 2155 return 1; 2156} 2157 2158/* 2159 * All the CM events are handled on a work queue to have a safe context. 2160 * These are the real handlers that are called from the work queue. 2161 */ 2162static const cxgb3_cpl_handler_func work_handlers[NUM_CPL_CMDS] = { 2163 [CPL_ACT_ESTABLISH] = act_establish, 2164 [CPL_ACT_OPEN_RPL] = act_open_rpl, 2165 [CPL_RX_DATA] = rx_data, 2166 [CPL_TX_DMA_ACK] = tx_ack, 2167 [CPL_ABORT_RPL_RSS] = abort_rpl, 2168 [CPL_ABORT_RPL] = abort_rpl, 2169 [CPL_PASS_OPEN_RPL] = pass_open_rpl, 2170 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl, 2171 [CPL_PASS_ACCEPT_REQ] = pass_accept_req, 2172 [CPL_PASS_ESTABLISH] = pass_establish, 2173 [CPL_PEER_CLOSE] = peer_close, 2174 [CPL_ABORT_REQ_RSS] = peer_abort, 2175 [CPL_CLOSE_CON_RPL] = close_con_rpl, 2176 [CPL_RDMA_TERMINATE] = terminate, 2177 [CPL_RDMA_EC_STATUS] = ec_status, 2178}; 2179 2180static void process_work(struct work_struct *work) 2181{ 2182 struct sk_buff *skb = NULL; 2183 void *ep; 2184 struct t3cdev *tdev; 2185 int ret; 2186 2187 while ((skb = skb_dequeue(&rxq))) { 2188 ep = *((void **) (skb->cb)); 2189 tdev = *((struct t3cdev **) (skb->cb + sizeof(void *))); 2190 ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep); 2191 if (ret & CPL_RET_BUF_DONE) 2192 kfree_skb(skb); 2193 2194 /* 2195 * ep was referenced in sched(), and is freed here. 2196 */ 2197 put_ep((struct iwch_ep_common *)ep); 2198 } 2199} 2200 2201static DECLARE_WORK(skb_work, process_work); 2202 2203static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 2204{ 2205 struct iwch_ep_common *epc = ctx; 2206 2207 get_ep(epc); 2208 2209 /* 2210 * Save ctx and tdev in the skb->cb area. 2211 */ 2212 *((void **) skb->cb) = ctx; 2213 *((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev; 2214 2215 /* 2216 * Queue the skb and schedule the worker thread. 2217 */ 2218 skb_queue_tail(&rxq, skb); 2219 queue_work(workq, &skb_work); 2220 return 0; 2221} 2222 2223static int set_tcb_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) 2224{ 2225 struct cpl_set_tcb_rpl *rpl = cplhdr(skb); 2226 2227 if (rpl->status != CPL_ERR_NONE) { 2228 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u " 2229 "for tid %u\n", rpl->status, GET_TID(rpl)); 2230 } 2231 return CPL_RET_BUF_DONE; 2232} 2233 2234/* 2235 * All upcalls from the T3 Core go to sched() to schedule the 2236 * processing on a work queue. 2237 */ 2238cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS] = { 2239 [CPL_ACT_ESTABLISH] = sched, 2240 [CPL_ACT_OPEN_RPL] = sched, 2241 [CPL_RX_DATA] = sched, 2242 [CPL_TX_DMA_ACK] = sched, 2243 [CPL_ABORT_RPL_RSS] = sched, 2244 [CPL_ABORT_RPL] = sched, 2245 [CPL_PASS_OPEN_RPL] = sched, 2246 [CPL_CLOSE_LISTSRV_RPL] = sched, 2247 [CPL_PASS_ACCEPT_REQ] = sched, 2248 [CPL_PASS_ESTABLISH] = sched, 2249 [CPL_PEER_CLOSE] = sched, 2250 [CPL_CLOSE_CON_RPL] = sched, 2251 [CPL_ABORT_REQ_RSS] = sched, 2252 [CPL_RDMA_TERMINATE] = sched, 2253 [CPL_RDMA_EC_STATUS] = sched, 2254 [CPL_SET_TCB_RPL] = set_tcb_rpl, 2255}; 2256 2257int __init iwch_cm_init(void) 2258{ 2259 skb_queue_head_init(&rxq); 2260 2261 workq = create_singlethread_workqueue("iw_cxgb3"); 2262 if (!workq) 2263 return -ENOMEM; 2264 2265 return 0; 2266} 2267 2268void __exit iwch_cm_term(void) 2269{ 2270 flush_workqueue(workq); 2271 destroy_workqueue(workq); 2272} 2273