1/* 2 * Copyright (c) 2009-2014 Chelsio, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32#include <linux/module.h> 33#include <linux/list.h> 34#include <linux/workqueue.h> 35#include <linux/skbuff.h> 36#include <linux/timer.h> 37#include <linux/notifier.h> 38#include <linux/inetdevice.h> 39#include <linux/ip.h> 40#include <linux/tcp.h> 41#include <linux/if_vlan.h> 42 43#include <net/neighbour.h> 44#include <net/netevent.h> 45#include <net/route.h> 46#include <net/tcp.h> 47#include <net/ip6_route.h> 48#include <net/addrconf.h> 49 50#include <rdma/ib_addr.h> 51 52#include "iw_cxgb4.h" 53 54static char *states[] = { 55 "idle", 56 "listen", 57 "connecting", 58 "mpa_wait_req", 59 "mpa_req_sent", 60 "mpa_req_rcvd", 61 "mpa_rep_sent", 62 "fpdu_mode", 63 "aborting", 64 "closing", 65 "moribund", 66 "dead", 67 NULL, 68}; 69 70static int nocong; 71module_param(nocong, int, 0644); 72MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)"); 73 74static int enable_ecn; 75module_param(enable_ecn, int, 0644); 76MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)"); 77 78static int dack_mode = 1; 79module_param(dack_mode, int, 0644); 80MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)"); 81 82uint c4iw_max_read_depth = 32; 83module_param(c4iw_max_read_depth, int, 0644); 84MODULE_PARM_DESC(c4iw_max_read_depth, 85 "Per-connection max ORD/IRD (default=32)"); 86 87static int enable_tcp_timestamps; 88module_param(enable_tcp_timestamps, int, 0644); 89MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)"); 90 91static int enable_tcp_sack; 92module_param(enable_tcp_sack, int, 0644); 93MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)"); 94 95static int enable_tcp_window_scaling = 1; 96module_param(enable_tcp_window_scaling, int, 0644); 97MODULE_PARM_DESC(enable_tcp_window_scaling, 98 "Enable tcp window scaling (default=1)"); 99 100int c4iw_debug; 101module_param(c4iw_debug, int, 0644); 102MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)"); 103 104static int peer2peer = 1; 105module_param(peer2peer, int, 0644); 106MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)"); 107 108static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ; 109module_param(p2p_type, int, 0644); 110MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: " 111 "1=RDMA_READ 0=RDMA_WRITE (default 1)"); 112 113static int ep_timeout_secs = 60; 114module_param(ep_timeout_secs, int, 0644); 115MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout " 116 "in seconds (default=60)"); 117 118static int mpa_rev = 1; 119module_param(mpa_rev, int, 0644); 120MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, " 121 "1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft" 122 " compliant (default=1)"); 123 124static int markers_enabled; 125module_param(markers_enabled, int, 0644); 126MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)"); 127 128static int crc_enabled = 1; 129module_param(crc_enabled, int, 0644); 130MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)"); 131 132static int rcv_win = 256 * 1024; 133module_param(rcv_win, int, 0644); 134MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)"); 135 136static int snd_win = 128 * 1024; 137module_param(snd_win, int, 0644); 138MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)"); 139 140static struct workqueue_struct *workq; 141 142static struct sk_buff_head rxq; 143 144static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp); 145static void ep_timeout(unsigned long arg); 146static void connect_reply_upcall(struct c4iw_ep *ep, int status); 147 148static LIST_HEAD(timeout_list); 149static spinlock_t timeout_lock; 150 151static void deref_qp(struct c4iw_ep *ep) 152{ 153 c4iw_qp_rem_ref(&ep->com.qp->ibqp); 154 clear_bit(QP_REFERENCED, &ep->com.flags); 155} 156 157static void ref_qp(struct c4iw_ep *ep) 158{ 159 set_bit(QP_REFERENCED, &ep->com.flags); 160 c4iw_qp_add_ref(&ep->com.qp->ibqp); 161} 162 163static void start_ep_timer(struct c4iw_ep *ep) 164{ 165 PDBG("%s ep %p\n", __func__, ep); 166 if (timer_pending(&ep->timer)) { 167 pr_err("%s timer already started! ep %p\n", 168 __func__, ep); 169 return; 170 } 171 clear_bit(TIMEOUT, &ep->com.flags); 172 c4iw_get_ep(&ep->com); 173 ep->timer.expires = jiffies + ep_timeout_secs * HZ; 174 ep->timer.data = (unsigned long)ep; 175 ep->timer.function = ep_timeout; 176 add_timer(&ep->timer); 177} 178 179static int stop_ep_timer(struct c4iw_ep *ep) 180{ 181 PDBG("%s ep %p stopping\n", __func__, ep); 182 del_timer_sync(&ep->timer); 183 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) { 184 c4iw_put_ep(&ep->com); 185 return 0; 186 } 187 return 1; 188} 189 190static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb, 191 struct l2t_entry *l2e) 192{ 193 int error = 0; 194 195 if (c4iw_fatal_error(rdev)) { 196 kfree_skb(skb); 197 PDBG("%s - device in error state - dropping\n", __func__); 198 return -EIO; 199 } 200 error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e); 201 if (error < 0) 202 kfree_skb(skb); 203 return error < 0 ? error : 0; 204} 205 206int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb) 207{ 208 int error = 0; 209 210 if (c4iw_fatal_error(rdev)) { 211 kfree_skb(skb); 212 PDBG("%s - device in error state - dropping\n", __func__); 213 return -EIO; 214 } 215 error = cxgb4_ofld_send(rdev->lldi.ports[0], skb); 216 if (error < 0) 217 kfree_skb(skb); 218 return error < 0 ? error : 0; 219} 220 221static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb) 222{ 223 struct cpl_tid_release *req; 224 225 skb = get_skb(skb, sizeof *req, GFP_KERNEL); 226 if (!skb) 227 return; 228 req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req)); 229 INIT_TP_WR(req, hwtid); 230 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid)); 231 set_wr_txq(skb, CPL_PRIORITY_SETUP, 0); 232 c4iw_ofld_send(rdev, skb); 233 return; 234} 235 236static void set_emss(struct c4iw_ep *ep, u16 opt) 237{ 238 ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 239 ((AF_INET == ep->com.remote_addr.ss_family) ? 240 sizeof(struct iphdr) : sizeof(struct ipv6hdr)) - 241 sizeof(struct tcphdr); 242 ep->mss = ep->emss; 243 if (GET_TCPOPT_TSTAMP(opt)) 244 ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4); 245 if (ep->emss < 128) 246 ep->emss = 128; 247 if (ep->emss & 7) 248 PDBG("Warning: misaligned mtu idx %u mss %u emss=%u\n", 249 GET_TCPOPT_MSS(opt), ep->mss, ep->emss); 250 PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt), 251 ep->mss, ep->emss); 252} 253 254static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc) 255{ 256 enum c4iw_ep_state state; 257 258 mutex_lock(&epc->mutex); 259 state = epc->state; 260 mutex_unlock(&epc->mutex); 261 return state; 262} 263 264static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new) 265{ 266 epc->state = new; 267} 268 269static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new) 270{ 271 mutex_lock(&epc->mutex); 272 PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]); 273 __state_set(epc, new); 274 mutex_unlock(&epc->mutex); 275 return; 276} 277 278static void *alloc_ep(int size, gfp_t gfp) 279{ 280 struct c4iw_ep_common *epc; 281 282 epc = kzalloc(size, gfp); 283 if (epc) { 284 kref_init(&epc->kref); 285 mutex_init(&epc->mutex); 286 c4iw_init_wr_wait(&epc->wr_wait); 287 } 288 PDBG("%s alloc ep %p\n", __func__, epc); 289 return epc; 290} 291 292void _c4iw_free_ep(struct kref *kref) 293{ 294 struct c4iw_ep *ep; 295 296 ep = container_of(kref, struct c4iw_ep, com.kref); 297 PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]); 298 if (test_bit(QP_REFERENCED, &ep->com.flags)) 299 deref_qp(ep); 300 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) { 301 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid); 302 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid); 303 dst_release(ep->dst); 304 cxgb4_l2t_release(ep->l2t); 305 } 306 if (test_bit(RELEASE_MAPINFO, &ep->com.flags)) { 307 print_addr(&ep->com, __func__, "remove_mapinfo/mapping"); 308 iwpm_remove_mapinfo(&ep->com.local_addr, 309 &ep->com.mapped_local_addr); 310 iwpm_remove_mapping(&ep->com.local_addr, RDMA_NL_C4IW); 311 } 312 kfree(ep); 313} 314 315static void release_ep_resources(struct c4iw_ep *ep) 316{ 317 set_bit(RELEASE_RESOURCES, &ep->com.flags); 318 c4iw_put_ep(&ep->com); 319} 320 321static int status2errno(int status) 322{ 323 switch (status) { 324 case CPL_ERR_NONE: 325 return 0; 326 case CPL_ERR_CONN_RESET: 327 return -ECONNRESET; 328 case CPL_ERR_ARP_MISS: 329 return -EHOSTUNREACH; 330 case CPL_ERR_CONN_TIMEDOUT: 331 return -ETIMEDOUT; 332 case CPL_ERR_TCAM_FULL: 333 return -ENOMEM; 334 case CPL_ERR_CONN_EXIST: 335 return -EADDRINUSE; 336 default: 337 return -EIO; 338 } 339} 340 341/* 342 * Try and reuse skbs already allocated... 343 */ 344static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp) 345{ 346 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) { 347 skb_trim(skb, 0); 348 skb_get(skb); 349 skb_reset_transport_header(skb); 350 } else { 351 skb = alloc_skb(len, gfp); 352 } 353 t4_set_arp_err_handler(skb, NULL, NULL); 354 return skb; 355} 356 357static struct net_device *get_real_dev(struct net_device *egress_dev) 358{ 359 return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev; 360} 361 362static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev) 363{ 364 int i; 365 366 egress_dev = get_real_dev(egress_dev); 367 for (i = 0; i < dev->rdev.lldi.nports; i++) 368 if (dev->rdev.lldi.ports[i] == egress_dev) 369 return 1; 370 return 0; 371} 372 373static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip, 374 __u8 *peer_ip, __be16 local_port, 375 __be16 peer_port, u8 tos, 376 __u32 sin6_scope_id) 377{ 378 struct dst_entry *dst = NULL; 379 380 if (IS_ENABLED(CONFIG_IPV6)) { 381 struct flowi6 fl6; 382 383 memset(&fl6, 0, sizeof(fl6)); 384 memcpy(&fl6.daddr, peer_ip, 16); 385 memcpy(&fl6.saddr, local_ip, 16); 386 if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) 387 fl6.flowi6_oif = sin6_scope_id; 388 dst = ip6_route_output(&init_net, NULL, &fl6); 389 if (!dst) 390 goto out; 391 if (!our_interface(dev, ip6_dst_idev(dst)->dev) && 392 !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) { 393 dst_release(dst); 394 dst = NULL; 395 } 396 } 397 398out: 399 return dst; 400} 401 402static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip, 403 __be32 peer_ip, __be16 local_port, 404 __be16 peer_port, u8 tos) 405{ 406 struct rtable *rt; 407 struct flowi4 fl4; 408 struct neighbour *n; 409 410 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip, 411 peer_port, local_port, IPPROTO_TCP, 412 tos, 0); 413 if (IS_ERR(rt)) 414 return NULL; 415 n = dst_neigh_lookup(&rt->dst, &peer_ip); 416 if (!n) 417 return NULL; 418 if (!our_interface(dev, n->dev) && 419 !(n->dev->flags & IFF_LOOPBACK)) { 420 neigh_release(n); 421 dst_release(&rt->dst); 422 return NULL; 423 } 424 neigh_release(n); 425 return &rt->dst; 426} 427 428static void arp_failure_discard(void *handle, struct sk_buff *skb) 429{ 430 PDBG("%s c4iw_dev %p\n", __func__, handle); 431 kfree_skb(skb); 432} 433 434/* 435 * Handle an ARP failure for an active open. 436 */ 437static void act_open_req_arp_failure(void *handle, struct sk_buff *skb) 438{ 439 struct c4iw_ep *ep = handle; 440 441 printk(KERN_ERR MOD "ARP failure duing connect\n"); 442 kfree_skb(skb); 443 connect_reply_upcall(ep, -EHOSTUNREACH); 444 state_set(&ep->com, DEAD); 445 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid); 446 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid); 447 dst_release(ep->dst); 448 cxgb4_l2t_release(ep->l2t); 449 c4iw_put_ep(&ep->com); 450} 451 452/* 453 * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant 454 * and send it along. 455 */ 456static void abort_arp_failure(void *handle, struct sk_buff *skb) 457{ 458 struct c4iw_rdev *rdev = handle; 459 struct cpl_abort_req *req = cplhdr(skb); 460 461 PDBG("%s rdev %p\n", __func__, rdev); 462 req->cmd = CPL_ABORT_NO_RST; 463 c4iw_ofld_send(rdev, skb); 464} 465 466static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb) 467{ 468 unsigned int flowclen = 80; 469 struct fw_flowc_wr *flowc; 470 int i; 471 472 skb = get_skb(skb, flowclen, GFP_KERNEL); 473 flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen); 474 475 flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) | 476 FW_FLOWC_WR_NPARAMS(8)); 477 flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen, 478 16)) | FW_WR_FLOWID(ep->hwtid)); 479 480 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; 481 flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN 482 (ep->com.dev->rdev.lldi.pf)); 483 flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; 484 flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan); 485 flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; 486 flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan); 487 flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; 488 flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid); 489 flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; 490 flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq); 491 flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; 492 flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq); 493 flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; 494 flowc->mnemval[6].val = cpu_to_be32(ep->snd_win); 495 flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; 496 flowc->mnemval[7].val = cpu_to_be32(ep->emss); 497 /* Pad WR to 16 byte boundary */ 498 flowc->mnemval[8].mnemonic = 0; 499 flowc->mnemval[8].val = 0; 500 for (i = 0; i < 9; i++) { 501 flowc->mnemval[i].r4[0] = 0; 502 flowc->mnemval[i].r4[1] = 0; 503 flowc->mnemval[i].r4[2] = 0; 504 } 505 506 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 507 c4iw_ofld_send(&ep->com.dev->rdev, skb); 508} 509 510static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp) 511{ 512 struct cpl_close_con_req *req; 513 struct sk_buff *skb; 514 int wrlen = roundup(sizeof *req, 16); 515 516 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 517 skb = get_skb(NULL, wrlen, gfp); 518 if (!skb) { 519 printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); 520 return -ENOMEM; 521 } 522 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 523 t4_set_arp_err_handler(skb, NULL, arp_failure_discard); 524 req = (struct cpl_close_con_req *) skb_put(skb, wrlen); 525 memset(req, 0, wrlen); 526 INIT_TP_WR(req, ep->hwtid); 527 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, 528 ep->hwtid)); 529 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 530} 531 532static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp) 533{ 534 struct cpl_abort_req *req; 535 int wrlen = roundup(sizeof *req, 16); 536 537 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 538 skb = get_skb(skb, wrlen, gfp); 539 if (!skb) { 540 printk(KERN_ERR MOD "%s - failed to alloc skb.\n", 541 __func__); 542 return -ENOMEM; 543 } 544 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 545 t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure); 546 req = (struct cpl_abort_req *) skb_put(skb, wrlen); 547 memset(req, 0, wrlen); 548 INIT_TP_WR(req, ep->hwtid); 549 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid)); 550 req->cmd = CPL_ABORT_SEND_RST; 551 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 552} 553 554/* 555 * c4iw_form_pm_msg - Form a port mapper message with mapping info 556 */ 557static void c4iw_form_pm_msg(struct c4iw_ep *ep, 558 struct iwpm_sa_data *pm_msg) 559{ 560 memcpy(&pm_msg->loc_addr, &ep->com.local_addr, 561 sizeof(ep->com.local_addr)); 562 memcpy(&pm_msg->rem_addr, &ep->com.remote_addr, 563 sizeof(ep->com.remote_addr)); 564} 565 566/* 567 * c4iw_form_reg_msg - Form a port mapper message with dev info 568 */ 569static void c4iw_form_reg_msg(struct c4iw_dev *dev, 570 struct iwpm_dev_data *pm_msg) 571{ 572 memcpy(pm_msg->dev_name, dev->ibdev.name, IWPM_DEVNAME_SIZE); 573 memcpy(pm_msg->if_name, dev->rdev.lldi.ports[0]->name, 574 IWPM_IFNAME_SIZE); 575} 576 577static void c4iw_record_pm_msg(struct c4iw_ep *ep, 578 struct iwpm_sa_data *pm_msg) 579{ 580 memcpy(&ep->com.mapped_local_addr, &pm_msg->mapped_loc_addr, 581 sizeof(ep->com.mapped_local_addr)); 582 memcpy(&ep->com.mapped_remote_addr, &pm_msg->mapped_rem_addr, 583 sizeof(ep->com.mapped_remote_addr)); 584} 585 586static void best_mtu(const unsigned short *mtus, unsigned short mtu, 587 unsigned int *idx, int use_ts, int ipv6) 588{ 589 unsigned short hdr_size = (ipv6 ? 590 sizeof(struct ipv6hdr) : 591 sizeof(struct iphdr)) + 592 sizeof(struct tcphdr) + 593 (use_ts ? 594 round_up(TCPOLEN_TIMESTAMP, 4) : 0); 595 unsigned short data_size = mtu - hdr_size; 596 597 cxgb4_best_aligned_mtu(mtus, hdr_size, data_size, 8, idx); 598} 599 600static int send_connect(struct c4iw_ep *ep) 601{ 602 struct cpl_act_open_req *req; 603 struct cpl_t5_act_open_req *t5_req; 604 struct cpl_act_open_req6 *req6; 605 struct cpl_t5_act_open_req6 *t5_req6; 606 struct sk_buff *skb; 607 u64 opt0; 608 u32 opt2; 609 unsigned int mtu_idx; 610 int wscale; 611 int wrlen; 612 int sizev4 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ? 613 sizeof(struct cpl_act_open_req) : 614 sizeof(struct cpl_t5_act_open_req); 615 int sizev6 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ? 616 sizeof(struct cpl_act_open_req6) : 617 sizeof(struct cpl_t5_act_open_req6); 618 struct sockaddr_in *la = (struct sockaddr_in *) 619 &ep->com.mapped_local_addr; 620 struct sockaddr_in *ra = (struct sockaddr_in *) 621 &ep->com.mapped_remote_addr; 622 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *) 623 &ep->com.mapped_local_addr; 624 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *) 625 &ep->com.mapped_remote_addr; 626 int win; 627 628 wrlen = (ep->com.remote_addr.ss_family == AF_INET) ? 629 roundup(sizev4, 16) : 630 roundup(sizev6, 16); 631 632 PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid); 633 634 skb = get_skb(NULL, wrlen, GFP_KERNEL); 635 if (!skb) { 636 printk(KERN_ERR MOD "%s - failed to alloc skb.\n", 637 __func__); 638 return -ENOMEM; 639 } 640 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx); 641 642 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx, 643 enable_tcp_timestamps, 644 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1); 645 wscale = compute_wscale(rcv_win); 646 647 /* 648 * Specify the largest window that will fit in opt0. The 649 * remainder will be specified in the rx_data_ack. 650 */ 651 win = ep->rcv_win >> 10; 652 if (win > RCV_BUFSIZ_MASK) 653 win = RCV_BUFSIZ_MASK; 654 655 opt0 = (nocong ? NO_CONG(1) : 0) | 656 KEEP_ALIVE(1) | 657 DELACK(1) | 658 WND_SCALE(wscale) | 659 MSS_IDX(mtu_idx) | 660 L2T_IDX(ep->l2t->idx) | 661 TX_CHAN(ep->tx_chan) | 662 SMAC_SEL(ep->smac_idx) | 663 DSCP(ep->tos) | 664 ULP_MODE(ULP_MODE_TCPDDP) | 665 RCV_BUFSIZ(win); 666 opt2 = RX_CHANNEL(0) | 667 CCTRL_ECN(enable_ecn) | 668 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid); 669 if (enable_tcp_timestamps) 670 opt2 |= TSTAMPS_EN(1); 671 if (enable_tcp_sack) 672 opt2 |= SACK_EN(1); 673 if (wscale && enable_tcp_window_scaling) 674 opt2 |= WND_SCALE_EN(1); 675 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) { 676 opt2 |= T5_OPT_2_VALID; 677 opt2 |= V_CONG_CNTRL(CONG_ALG_TAHOE); 678 opt2 |= CONG_CNTRL_VALID; /* OPT_2_ISS for T5 */ 679 } 680 t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure); 681 682 if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) { 683 if (ep->com.remote_addr.ss_family == AF_INET) { 684 req = (struct cpl_act_open_req *) skb_put(skb, wrlen); 685 INIT_TP_WR(req, 0); 686 OPCODE_TID(req) = cpu_to_be32( 687 MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 688 ((ep->rss_qid << 14) | ep->atid))); 689 req->local_port = la->sin_port; 690 req->peer_port = ra->sin_port; 691 req->local_ip = la->sin_addr.s_addr; 692 req->peer_ip = ra->sin_addr.s_addr; 693 req->opt0 = cpu_to_be64(opt0); 694 req->params = cpu_to_be32(cxgb4_select_ntuple( 695 ep->com.dev->rdev.lldi.ports[0], 696 ep->l2t)); 697 req->opt2 = cpu_to_be32(opt2); 698 } else { 699 req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen); 700 701 INIT_TP_WR(req6, 0); 702 OPCODE_TID(req6) = cpu_to_be32( 703 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 704 ((ep->rss_qid<<14)|ep->atid))); 705 req6->local_port = la6->sin6_port; 706 req6->peer_port = ra6->sin6_port; 707 req6->local_ip_hi = *((__be64 *) 708 (la6->sin6_addr.s6_addr)); 709 req6->local_ip_lo = *((__be64 *) 710 (la6->sin6_addr.s6_addr + 8)); 711 req6->peer_ip_hi = *((__be64 *) 712 (ra6->sin6_addr.s6_addr)); 713 req6->peer_ip_lo = *((__be64 *) 714 (ra6->sin6_addr.s6_addr + 8)); 715 req6->opt0 = cpu_to_be64(opt0); 716 req6->params = cpu_to_be32(cxgb4_select_ntuple( 717 ep->com.dev->rdev.lldi.ports[0], 718 ep->l2t)); 719 req6->opt2 = cpu_to_be32(opt2); 720 } 721 } else { 722 u32 isn = (prandom_u32() & ~7UL) - 1; 723 724 if (peer2peer) 725 isn += 4; 726 727 if (ep->com.remote_addr.ss_family == AF_INET) { 728 t5_req = (struct cpl_t5_act_open_req *) 729 skb_put(skb, wrlen); 730 INIT_TP_WR(t5_req, 0); 731 OPCODE_TID(t5_req) = cpu_to_be32( 732 MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 733 ((ep->rss_qid << 14) | ep->atid))); 734 t5_req->local_port = la->sin_port; 735 t5_req->peer_port = ra->sin_port; 736 t5_req->local_ip = la->sin_addr.s_addr; 737 t5_req->peer_ip = ra->sin_addr.s_addr; 738 t5_req->opt0 = cpu_to_be64(opt0); 739 t5_req->params = cpu_to_be64(V_FILTER_TUPLE( 740 cxgb4_select_ntuple( 741 ep->com.dev->rdev.lldi.ports[0], 742 ep->l2t))); 743 t5_req->rsvd = cpu_to_be32(isn); 744 PDBG("%s snd_isn %u\n", __func__, 745 be32_to_cpu(t5_req->rsvd)); 746 t5_req->opt2 = cpu_to_be32(opt2); 747 } else { 748 t5_req6 = (struct cpl_t5_act_open_req6 *) 749 skb_put(skb, wrlen); 750 INIT_TP_WR(t5_req6, 0); 751 OPCODE_TID(t5_req6) = cpu_to_be32( 752 MK_OPCODE_TID(CPL_ACT_OPEN_REQ6, 753 ((ep->rss_qid<<14)|ep->atid))); 754 t5_req6->local_port = la6->sin6_port; 755 t5_req6->peer_port = ra6->sin6_port; 756 t5_req6->local_ip_hi = *((__be64 *) 757 (la6->sin6_addr.s6_addr)); 758 t5_req6->local_ip_lo = *((__be64 *) 759 (la6->sin6_addr.s6_addr + 8)); 760 t5_req6->peer_ip_hi = *((__be64 *) 761 (ra6->sin6_addr.s6_addr)); 762 t5_req6->peer_ip_lo = *((__be64 *) 763 (ra6->sin6_addr.s6_addr + 8)); 764 t5_req6->opt0 = cpu_to_be64(opt0); 765 t5_req6->params = cpu_to_be64(V_FILTER_TUPLE( 766 cxgb4_select_ntuple( 767 ep->com.dev->rdev.lldi.ports[0], 768 ep->l2t))); 769 t5_req6->rsvd = cpu_to_be32(isn); 770 PDBG("%s snd_isn %u\n", __func__, 771 be32_to_cpu(t5_req6->rsvd)); 772 t5_req6->opt2 = cpu_to_be32(opt2); 773 } 774 } 775 776 set_bit(ACT_OPEN_REQ, &ep->com.history); 777 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 778} 779 780static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb, 781 u8 mpa_rev_to_use) 782{ 783 int mpalen, wrlen; 784 struct fw_ofld_tx_data_wr *req; 785 struct mpa_message *mpa; 786 struct mpa_v2_conn_params mpa_v2_params; 787 788 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen); 789 790 BUG_ON(skb_cloned(skb)); 791 792 mpalen = sizeof(*mpa) + ep->plen; 793 if (mpa_rev_to_use == 2) 794 mpalen += sizeof(struct mpa_v2_conn_params); 795 wrlen = roundup(mpalen + sizeof *req, 16); 796 skb = get_skb(skb, wrlen, GFP_KERNEL); 797 if (!skb) { 798 connect_reply_upcall(ep, -ENOMEM); 799 return; 800 } 801 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 802 803 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen); 804 memset(req, 0, wrlen); 805 req->op_to_immdlen = cpu_to_be32( 806 FW_WR_OP(FW_OFLD_TX_DATA_WR) | 807 FW_WR_COMPL(1) | 808 FW_WR_IMMDLEN(mpalen)); 809 req->flowid_len16 = cpu_to_be32( 810 FW_WR_FLOWID(ep->hwtid) | 811 FW_WR_LEN16(wrlen >> 4)); 812 req->plen = cpu_to_be32(mpalen); 813 req->tunnel_to_proxy = cpu_to_be32( 814 FW_OFLD_TX_DATA_WR_FLUSH(1) | 815 FW_OFLD_TX_DATA_WR_SHOVE(1)); 816 817 mpa = (struct mpa_message *)(req + 1); 818 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)); 819 mpa->flags = (crc_enabled ? MPA_CRC : 0) | 820 (markers_enabled ? MPA_MARKERS : 0) | 821 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0); 822 mpa->private_data_size = htons(ep->plen); 823 mpa->revision = mpa_rev_to_use; 824 if (mpa_rev_to_use == 1) { 825 ep->tried_with_mpa_v1 = 1; 826 ep->retry_with_mpa_v1 = 0; 827 } 828 829 if (mpa_rev_to_use == 2) { 830 mpa->private_data_size = htons(ntohs(mpa->private_data_size) + 831 sizeof (struct mpa_v2_conn_params)); 832 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird, 833 ep->ord); 834 mpa_v2_params.ird = htons((u16)ep->ird); 835 mpa_v2_params.ord = htons((u16)ep->ord); 836 837 if (peer2peer) { 838 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL); 839 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) 840 mpa_v2_params.ord |= 841 htons(MPA_V2_RDMA_WRITE_RTR); 842 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) 843 mpa_v2_params.ord |= 844 htons(MPA_V2_RDMA_READ_RTR); 845 } 846 memcpy(mpa->private_data, &mpa_v2_params, 847 sizeof(struct mpa_v2_conn_params)); 848 849 if (ep->plen) 850 memcpy(mpa->private_data + 851 sizeof(struct mpa_v2_conn_params), 852 ep->mpa_pkt + sizeof(*mpa), ep->plen); 853 } else 854 if (ep->plen) 855 memcpy(mpa->private_data, 856 ep->mpa_pkt + sizeof(*mpa), ep->plen); 857 858 /* 859 * Reference the mpa skb. This ensures the data area 860 * will remain in memory until the hw acks the tx. 861 * Function fw4_ack() will deref it. 862 */ 863 skb_get(skb); 864 t4_set_arp_err_handler(skb, NULL, arp_failure_discard); 865 BUG_ON(ep->mpa_skb); 866 ep->mpa_skb = skb; 867 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 868 start_ep_timer(ep); 869 __state_set(&ep->com, MPA_REQ_SENT); 870 ep->mpa_attr.initiator = 1; 871 ep->snd_seq += mpalen; 872 return; 873} 874 875static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen) 876{ 877 int mpalen, wrlen; 878 struct fw_ofld_tx_data_wr *req; 879 struct mpa_message *mpa; 880 struct sk_buff *skb; 881 struct mpa_v2_conn_params mpa_v2_params; 882 883 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen); 884 885 mpalen = sizeof(*mpa) + plen; 886 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) 887 mpalen += sizeof(struct mpa_v2_conn_params); 888 wrlen = roundup(mpalen + sizeof *req, 16); 889 890 skb = get_skb(NULL, wrlen, GFP_KERNEL); 891 if (!skb) { 892 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); 893 return -ENOMEM; 894 } 895 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 896 897 req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen); 898 memset(req, 0, wrlen); 899 req->op_to_immdlen = cpu_to_be32( 900 FW_WR_OP(FW_OFLD_TX_DATA_WR) | 901 FW_WR_COMPL(1) | 902 FW_WR_IMMDLEN(mpalen)); 903 req->flowid_len16 = cpu_to_be32( 904 FW_WR_FLOWID(ep->hwtid) | 905 FW_WR_LEN16(wrlen >> 4)); 906 req->plen = cpu_to_be32(mpalen); 907 req->tunnel_to_proxy = cpu_to_be32( 908 FW_OFLD_TX_DATA_WR_FLUSH(1) | 909 FW_OFLD_TX_DATA_WR_SHOVE(1)); 910 911 mpa = (struct mpa_message *)(req + 1); 912 memset(mpa, 0, sizeof(*mpa)); 913 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); 914 mpa->flags = MPA_REJECT; 915 mpa->revision = ep->mpa_attr.version; 916 mpa->private_data_size = htons(plen); 917 918 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 919 mpa->flags |= MPA_ENHANCED_RDMA_CONN; 920 mpa->private_data_size = htons(ntohs(mpa->private_data_size) + 921 sizeof (struct mpa_v2_conn_params)); 922 mpa_v2_params.ird = htons(((u16)ep->ird) | 923 (peer2peer ? MPA_V2_PEER2PEER_MODEL : 924 0)); 925 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ? 926 (p2p_type == 927 FW_RI_INIT_P2PTYPE_RDMA_WRITE ? 928 MPA_V2_RDMA_WRITE_RTR : p2p_type == 929 FW_RI_INIT_P2PTYPE_READ_REQ ? 930 MPA_V2_RDMA_READ_RTR : 0) : 0)); 931 memcpy(mpa->private_data, &mpa_v2_params, 932 sizeof(struct mpa_v2_conn_params)); 933 934 if (ep->plen) 935 memcpy(mpa->private_data + 936 sizeof(struct mpa_v2_conn_params), pdata, plen); 937 } else 938 if (plen) 939 memcpy(mpa->private_data, pdata, plen); 940 941 /* 942 * Reference the mpa skb again. This ensures the data area 943 * will remain in memory until the hw acks the tx. 944 * Function fw4_ack() will deref it. 945 */ 946 skb_get(skb); 947 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 948 t4_set_arp_err_handler(skb, NULL, arp_failure_discard); 949 BUG_ON(ep->mpa_skb); 950 ep->mpa_skb = skb; 951 ep->snd_seq += mpalen; 952 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 953} 954 955static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen) 956{ 957 int mpalen, wrlen; 958 struct fw_ofld_tx_data_wr *req; 959 struct mpa_message *mpa; 960 struct sk_buff *skb; 961 struct mpa_v2_conn_params mpa_v2_params; 962 963 PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen); 964 965 mpalen = sizeof(*mpa) + plen; 966 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) 967 mpalen += sizeof(struct mpa_v2_conn_params); 968 wrlen = roundup(mpalen + sizeof *req, 16); 969 970 skb = get_skb(NULL, wrlen, GFP_KERNEL); 971 if (!skb) { 972 printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); 973 return -ENOMEM; 974 } 975 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 976 977 req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen); 978 memset(req, 0, wrlen); 979 req->op_to_immdlen = cpu_to_be32( 980 FW_WR_OP(FW_OFLD_TX_DATA_WR) | 981 FW_WR_COMPL(1) | 982 FW_WR_IMMDLEN(mpalen)); 983 req->flowid_len16 = cpu_to_be32( 984 FW_WR_FLOWID(ep->hwtid) | 985 FW_WR_LEN16(wrlen >> 4)); 986 req->plen = cpu_to_be32(mpalen); 987 req->tunnel_to_proxy = cpu_to_be32( 988 FW_OFLD_TX_DATA_WR_FLUSH(1) | 989 FW_OFLD_TX_DATA_WR_SHOVE(1)); 990 991 mpa = (struct mpa_message *)(req + 1); 992 memset(mpa, 0, sizeof(*mpa)); 993 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); 994 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) | 995 (markers_enabled ? MPA_MARKERS : 0); 996 mpa->revision = ep->mpa_attr.version; 997 mpa->private_data_size = htons(plen); 998 999 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 1000 mpa->flags |= MPA_ENHANCED_RDMA_CONN; 1001 mpa->private_data_size = htons(ntohs(mpa->private_data_size) + 1002 sizeof (struct mpa_v2_conn_params)); 1003 mpa_v2_params.ird = htons((u16)ep->ird); 1004 mpa_v2_params.ord = htons((u16)ep->ord); 1005 if (peer2peer && (ep->mpa_attr.p2p_type != 1006 FW_RI_INIT_P2PTYPE_DISABLED)) { 1007 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL); 1008 1009 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) 1010 mpa_v2_params.ord |= 1011 htons(MPA_V2_RDMA_WRITE_RTR); 1012 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) 1013 mpa_v2_params.ord |= 1014 htons(MPA_V2_RDMA_READ_RTR); 1015 } 1016 1017 memcpy(mpa->private_data, &mpa_v2_params, 1018 sizeof(struct mpa_v2_conn_params)); 1019 1020 if (ep->plen) 1021 memcpy(mpa->private_data + 1022 sizeof(struct mpa_v2_conn_params), pdata, plen); 1023 } else 1024 if (plen) 1025 memcpy(mpa->private_data, pdata, plen); 1026 1027 /* 1028 * Reference the mpa skb. This ensures the data area 1029 * will remain in memory until the hw acks the tx. 1030 * Function fw4_ack() will deref it. 1031 */ 1032 skb_get(skb); 1033 t4_set_arp_err_handler(skb, NULL, arp_failure_discard); 1034 ep->mpa_skb = skb; 1035 __state_set(&ep->com, MPA_REP_SENT); 1036 ep->snd_seq += mpalen; 1037 return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 1038} 1039 1040static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb) 1041{ 1042 struct c4iw_ep *ep; 1043 struct cpl_act_establish *req = cplhdr(skb); 1044 unsigned int tid = GET_TID(req); 1045 unsigned int atid = GET_TID_TID(ntohl(req->tos_atid)); 1046 struct tid_info *t = dev->rdev.lldi.tids; 1047 1048 ep = lookup_atid(t, atid); 1049 1050 PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid, 1051 be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn)); 1052 1053 mutex_lock(&ep->com.mutex); 1054 dst_confirm(ep->dst); 1055 1056 /* setup the hwtid for this connection */ 1057 ep->hwtid = tid; 1058 cxgb4_insert_tid(t, ep, tid); 1059 insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid); 1060 1061 ep->snd_seq = be32_to_cpu(req->snd_isn); 1062 ep->rcv_seq = be32_to_cpu(req->rcv_isn); 1063 1064 set_emss(ep, ntohs(req->tcp_opt)); 1065 1066 /* dealloc the atid */ 1067 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid); 1068 cxgb4_free_atid(t, atid); 1069 set_bit(ACT_ESTAB, &ep->com.history); 1070 1071 /* start MPA negotiation */ 1072 send_flowc(ep, NULL); 1073 if (ep->retry_with_mpa_v1) 1074 send_mpa_req(ep, skb, 1); 1075 else 1076 send_mpa_req(ep, skb, mpa_rev); 1077 mutex_unlock(&ep->com.mutex); 1078 return 0; 1079} 1080 1081static void close_complete_upcall(struct c4iw_ep *ep, int status) 1082{ 1083 struct iw_cm_event event; 1084 1085 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 1086 memset(&event, 0, sizeof(event)); 1087 event.event = IW_CM_EVENT_CLOSE; 1088 event.status = status; 1089 if (ep->com.cm_id) { 1090 PDBG("close complete delivered ep %p cm_id %p tid %u\n", 1091 ep, ep->com.cm_id, ep->hwtid); 1092 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1093 ep->com.cm_id->rem_ref(ep->com.cm_id); 1094 ep->com.cm_id = NULL; 1095 set_bit(CLOSE_UPCALL, &ep->com.history); 1096 } 1097} 1098 1099static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp) 1100{ 1101 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 1102 __state_set(&ep->com, ABORTING); 1103 set_bit(ABORT_CONN, &ep->com.history); 1104 return send_abort(ep, skb, gfp); 1105} 1106 1107static void peer_close_upcall(struct c4iw_ep *ep) 1108{ 1109 struct iw_cm_event event; 1110 1111 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 1112 memset(&event, 0, sizeof(event)); 1113 event.event = IW_CM_EVENT_DISCONNECT; 1114 if (ep->com.cm_id) { 1115 PDBG("peer close delivered ep %p cm_id %p tid %u\n", 1116 ep, ep->com.cm_id, ep->hwtid); 1117 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1118 set_bit(DISCONN_UPCALL, &ep->com.history); 1119 } 1120} 1121 1122static void peer_abort_upcall(struct c4iw_ep *ep) 1123{ 1124 struct iw_cm_event event; 1125 1126 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 1127 memset(&event, 0, sizeof(event)); 1128 event.event = IW_CM_EVENT_CLOSE; 1129 event.status = -ECONNRESET; 1130 if (ep->com.cm_id) { 1131 PDBG("abort delivered ep %p cm_id %p tid %u\n", ep, 1132 ep->com.cm_id, ep->hwtid); 1133 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1134 ep->com.cm_id->rem_ref(ep->com.cm_id); 1135 ep->com.cm_id = NULL; 1136 set_bit(ABORT_UPCALL, &ep->com.history); 1137 } 1138} 1139 1140static void connect_reply_upcall(struct c4iw_ep *ep, int status) 1141{ 1142 struct iw_cm_event event; 1143 1144 PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status); 1145 memset(&event, 0, sizeof(event)); 1146 event.event = IW_CM_EVENT_CONNECT_REPLY; 1147 event.status = status; 1148 memcpy(&event.local_addr, &ep->com.local_addr, 1149 sizeof(ep->com.local_addr)); 1150 memcpy(&event.remote_addr, &ep->com.remote_addr, 1151 sizeof(ep->com.remote_addr)); 1152 1153 if ((status == 0) || (status == -ECONNREFUSED)) { 1154 if (!ep->tried_with_mpa_v1) { 1155 /* this means MPA_v2 is used */ 1156 event.private_data_len = ep->plen - 1157 sizeof(struct mpa_v2_conn_params); 1158 event.private_data = ep->mpa_pkt + 1159 sizeof(struct mpa_message) + 1160 sizeof(struct mpa_v2_conn_params); 1161 } else { 1162 /* this means MPA_v1 is used */ 1163 event.private_data_len = ep->plen; 1164 event.private_data = ep->mpa_pkt + 1165 sizeof(struct mpa_message); 1166 } 1167 } 1168 1169 PDBG("%s ep %p tid %u status %d\n", __func__, ep, 1170 ep->hwtid, status); 1171 set_bit(CONN_RPL_UPCALL, &ep->com.history); 1172 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1173 1174 if (status < 0) { 1175 ep->com.cm_id->rem_ref(ep->com.cm_id); 1176 ep->com.cm_id = NULL; 1177 } 1178} 1179 1180static int connect_request_upcall(struct c4iw_ep *ep) 1181{ 1182 struct iw_cm_event event; 1183 int ret; 1184 1185 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 1186 memset(&event, 0, sizeof(event)); 1187 event.event = IW_CM_EVENT_CONNECT_REQUEST; 1188 memcpy(&event.local_addr, &ep->com.local_addr, 1189 sizeof(ep->com.local_addr)); 1190 memcpy(&event.remote_addr, &ep->com.remote_addr, 1191 sizeof(ep->com.remote_addr)); 1192 event.provider_data = ep; 1193 if (!ep->tried_with_mpa_v1) { 1194 /* this means MPA_v2 is used */ 1195 event.ord = ep->ord; 1196 event.ird = ep->ird; 1197 event.private_data_len = ep->plen - 1198 sizeof(struct mpa_v2_conn_params); 1199 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) + 1200 sizeof(struct mpa_v2_conn_params); 1201 } else { 1202 /* this means MPA_v1 is used. Send max supported */ 1203 event.ord = cur_max_read_depth(ep->com.dev); 1204 event.ird = cur_max_read_depth(ep->com.dev); 1205 event.private_data_len = ep->plen; 1206 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); 1207 } 1208 c4iw_get_ep(&ep->com); 1209 ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id, 1210 &event); 1211 if (ret) 1212 c4iw_put_ep(&ep->com); 1213 set_bit(CONNREQ_UPCALL, &ep->com.history); 1214 c4iw_put_ep(&ep->parent_ep->com); 1215 return ret; 1216} 1217 1218static void established_upcall(struct c4iw_ep *ep) 1219{ 1220 struct iw_cm_event event; 1221 1222 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 1223 memset(&event, 0, sizeof(event)); 1224 event.event = IW_CM_EVENT_ESTABLISHED; 1225 event.ird = ep->ird; 1226 event.ord = ep->ord; 1227 if (ep->com.cm_id) { 1228 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 1229 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1230 set_bit(ESTAB_UPCALL, &ep->com.history); 1231 } 1232} 1233 1234static int update_rx_credits(struct c4iw_ep *ep, u32 credits) 1235{ 1236 struct cpl_rx_data_ack *req; 1237 struct sk_buff *skb; 1238 int wrlen = roundup(sizeof *req, 16); 1239 1240 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits); 1241 skb = get_skb(NULL, wrlen, GFP_KERNEL); 1242 if (!skb) { 1243 printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n"); 1244 return 0; 1245 } 1246 1247 /* 1248 * If we couldn't specify the entire rcv window at connection setup 1249 * due to the limit in the number of bits in the RCV_BUFSIZ field, 1250 * then add the overage in to the credits returned. 1251 */ 1252 if (ep->rcv_win > RCV_BUFSIZ_MASK * 1024) 1253 credits += ep->rcv_win - RCV_BUFSIZ_MASK * 1024; 1254 1255 req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen); 1256 memset(req, 0, wrlen); 1257 INIT_TP_WR(req, ep->hwtid); 1258 OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, 1259 ep->hwtid)); 1260 req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) | 1261 F_RX_DACK_CHANGE | 1262 V_RX_DACK_MODE(dack_mode)); 1263 set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx); 1264 c4iw_ofld_send(&ep->com.dev->rdev, skb); 1265 return credits; 1266} 1267 1268#define RELAXED_IRD_NEGOTIATION 1 1269 1270static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb) 1271{ 1272 struct mpa_message *mpa; 1273 struct mpa_v2_conn_params *mpa_v2_params; 1274 u16 plen; 1275 u16 resp_ird, resp_ord; 1276 u8 rtr_mismatch = 0, insuff_ird = 0; 1277 struct c4iw_qp_attributes attrs; 1278 enum c4iw_qp_attr_mask mask; 1279 int err; 1280 int disconnect = 0; 1281 1282 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 1283 1284 /* 1285 * Stop mpa timer. If it expired, then 1286 * we ignore the MPA reply. process_timeout() 1287 * will abort the connection. 1288 */ 1289 if (stop_ep_timer(ep)) 1290 return 0; 1291 1292 /* 1293 * If we get more than the supported amount of private data 1294 * then we must fail this connection. 1295 */ 1296 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { 1297 err = -EINVAL; 1298 goto err; 1299 } 1300 1301 /* 1302 * copy the new data into our accumulation buffer. 1303 */ 1304 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), 1305 skb->len); 1306 ep->mpa_pkt_len += skb->len; 1307 1308 /* 1309 * if we don't even have the mpa message, then bail. 1310 */ 1311 if (ep->mpa_pkt_len < sizeof(*mpa)) 1312 return 0; 1313 mpa = (struct mpa_message *) ep->mpa_pkt; 1314 1315 /* Validate MPA header. */ 1316 if (mpa->revision > mpa_rev) { 1317 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d," 1318 " Received = %d\n", __func__, mpa_rev, mpa->revision); 1319 err = -EPROTO; 1320 goto err; 1321 } 1322 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) { 1323 err = -EPROTO; 1324 goto err; 1325 } 1326 1327 plen = ntohs(mpa->private_data_size); 1328 1329 /* 1330 * Fail if there's too much private data. 1331 */ 1332 if (plen > MPA_MAX_PRIVATE_DATA) { 1333 err = -EPROTO; 1334 goto err; 1335 } 1336 1337 /* 1338 * If plen does not account for pkt size 1339 */ 1340 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { 1341 err = -EPROTO; 1342 goto err; 1343 } 1344 1345 ep->plen = (u8) plen; 1346 1347 /* 1348 * If we don't have all the pdata yet, then bail. 1349 * We'll continue process when more data arrives. 1350 */ 1351 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) 1352 return 0; 1353 1354 if (mpa->flags & MPA_REJECT) { 1355 err = -ECONNREFUSED; 1356 goto err; 1357 } 1358 1359 /* 1360 * If we get here we have accumulated the entire mpa 1361 * start reply message including private data. And 1362 * the MPA header is valid. 1363 */ 1364 __state_set(&ep->com, FPDU_MODE); 1365 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; 1366 ep->mpa_attr.recv_marker_enabled = markers_enabled; 1367 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; 1368 ep->mpa_attr.version = mpa->revision; 1369 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; 1370 1371 if (mpa->revision == 2) { 1372 ep->mpa_attr.enhanced_rdma_conn = 1373 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0; 1374 if (ep->mpa_attr.enhanced_rdma_conn) { 1375 mpa_v2_params = (struct mpa_v2_conn_params *) 1376 (ep->mpa_pkt + sizeof(*mpa)); 1377 resp_ird = ntohs(mpa_v2_params->ird) & 1378 MPA_V2_IRD_ORD_MASK; 1379 resp_ord = ntohs(mpa_v2_params->ord) & 1380 MPA_V2_IRD_ORD_MASK; 1381 PDBG("%s responder ird %u ord %u ep ird %u ord %u\n", 1382 __func__, resp_ird, resp_ord, ep->ird, ep->ord); 1383 1384 /* 1385 * This is a double-check. Ideally, below checks are 1386 * not required since ird/ord stuff has been taken 1387 * care of in c4iw_accept_cr 1388 */ 1389 if (ep->ird < resp_ord) { 1390 if (RELAXED_IRD_NEGOTIATION && resp_ord <= 1391 ep->com.dev->rdev.lldi.max_ordird_qp) 1392 ep->ird = resp_ord; 1393 else 1394 insuff_ird = 1; 1395 } else if (ep->ird > resp_ord) { 1396 ep->ird = resp_ord; 1397 } 1398 if (ep->ord > resp_ird) { 1399 if (RELAXED_IRD_NEGOTIATION) 1400 ep->ord = resp_ird; 1401 else 1402 insuff_ird = 1; 1403 } 1404 if (insuff_ird) { 1405 err = -ENOMEM; 1406 ep->ird = resp_ord; 1407 ep->ord = resp_ird; 1408 } 1409 1410 if (ntohs(mpa_v2_params->ird) & 1411 MPA_V2_PEER2PEER_MODEL) { 1412 if (ntohs(mpa_v2_params->ord) & 1413 MPA_V2_RDMA_WRITE_RTR) 1414 ep->mpa_attr.p2p_type = 1415 FW_RI_INIT_P2PTYPE_RDMA_WRITE; 1416 else if (ntohs(mpa_v2_params->ord) & 1417 MPA_V2_RDMA_READ_RTR) 1418 ep->mpa_attr.p2p_type = 1419 FW_RI_INIT_P2PTYPE_READ_REQ; 1420 } 1421 } 1422 } else if (mpa->revision == 1) 1423 if (peer2peer) 1424 ep->mpa_attr.p2p_type = p2p_type; 1425 1426 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " 1427 "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = " 1428 "%d\n", __func__, ep->mpa_attr.crc_enabled, 1429 ep->mpa_attr.recv_marker_enabled, 1430 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version, 1431 ep->mpa_attr.p2p_type, p2p_type); 1432 1433 /* 1434 * If responder's RTR does not match with that of initiator, assign 1435 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not 1436 * generated when moving QP to RTS state. 1437 * A TERM message will be sent after QP has moved to RTS state 1438 */ 1439 if ((ep->mpa_attr.version == 2) && peer2peer && 1440 (ep->mpa_attr.p2p_type != p2p_type)) { 1441 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; 1442 rtr_mismatch = 1; 1443 } 1444 1445 attrs.mpa_attr = ep->mpa_attr; 1446 attrs.max_ird = ep->ird; 1447 attrs.max_ord = ep->ord; 1448 attrs.llp_stream_handle = ep; 1449 attrs.next_state = C4IW_QP_STATE_RTS; 1450 1451 mask = C4IW_QP_ATTR_NEXT_STATE | 1452 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR | 1453 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD; 1454 1455 /* bind QP and TID with INIT_WR */ 1456 err = c4iw_modify_qp(ep->com.qp->rhp, 1457 ep->com.qp, mask, &attrs, 1); 1458 if (err) 1459 goto err; 1460 1461 /* 1462 * If responder's RTR requirement did not match with what initiator 1463 * supports, generate TERM message 1464 */ 1465 if (rtr_mismatch) { 1466 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__); 1467 attrs.layer_etype = LAYER_MPA | DDP_LLP; 1468 attrs.ecode = MPA_NOMATCH_RTR; 1469 attrs.next_state = C4IW_QP_STATE_TERMINATE; 1470 attrs.send_term = 1; 1471 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 1472 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 1473 err = -ENOMEM; 1474 disconnect = 1; 1475 goto out; 1476 } 1477 1478 /* 1479 * Generate TERM if initiator IRD is not sufficient for responder 1480 * provided ORD. Currently, we do the same behaviour even when 1481 * responder provided IRD is also not sufficient as regards to 1482 * initiator ORD. 1483 */ 1484 if (insuff_ird) { 1485 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n", 1486 __func__); 1487 attrs.layer_etype = LAYER_MPA | DDP_LLP; 1488 attrs.ecode = MPA_INSUFF_IRD; 1489 attrs.next_state = C4IW_QP_STATE_TERMINATE; 1490 attrs.send_term = 1; 1491 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 1492 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 1493 err = -ENOMEM; 1494 disconnect = 1; 1495 goto out; 1496 } 1497 goto out; 1498err: 1499 __state_set(&ep->com, ABORTING); 1500 send_abort(ep, skb, GFP_KERNEL); 1501out: 1502 connect_reply_upcall(ep, err); 1503 return disconnect; 1504} 1505 1506static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb) 1507{ 1508 struct mpa_message *mpa; 1509 struct mpa_v2_conn_params *mpa_v2_params; 1510 u16 plen; 1511 1512 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 1513 1514 /* 1515 * If we get more than the supported amount of private data 1516 * then we must fail this connection. 1517 */ 1518 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { 1519 (void)stop_ep_timer(ep); 1520 abort_connection(ep, skb, GFP_KERNEL); 1521 return; 1522 } 1523 1524 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); 1525 1526 /* 1527 * Copy the new data into our accumulation buffer. 1528 */ 1529 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), 1530 skb->len); 1531 ep->mpa_pkt_len += skb->len; 1532 1533 /* 1534 * If we don't even have the mpa message, then bail. 1535 * We'll continue process when more data arrives. 1536 */ 1537 if (ep->mpa_pkt_len < sizeof(*mpa)) 1538 return; 1539 1540 PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); 1541 mpa = (struct mpa_message *) ep->mpa_pkt; 1542 1543 /* 1544 * Validate MPA Header. 1545 */ 1546 if (mpa->revision > mpa_rev) { 1547 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d," 1548 " Received = %d\n", __func__, mpa_rev, mpa->revision); 1549 (void)stop_ep_timer(ep); 1550 abort_connection(ep, skb, GFP_KERNEL); 1551 return; 1552 } 1553 1554 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) { 1555 (void)stop_ep_timer(ep); 1556 abort_connection(ep, skb, GFP_KERNEL); 1557 return; 1558 } 1559 1560 plen = ntohs(mpa->private_data_size); 1561 1562 /* 1563 * Fail if there's too much private data. 1564 */ 1565 if (plen > MPA_MAX_PRIVATE_DATA) { 1566 (void)stop_ep_timer(ep); 1567 abort_connection(ep, skb, GFP_KERNEL); 1568 return; 1569 } 1570 1571 /* 1572 * If plen does not account for pkt size 1573 */ 1574 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { 1575 (void)stop_ep_timer(ep); 1576 abort_connection(ep, skb, GFP_KERNEL); 1577 return; 1578 } 1579 ep->plen = (u8) plen; 1580 1581 /* 1582 * If we don't have all the pdata yet, then bail. 1583 */ 1584 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) 1585 return; 1586 1587 /* 1588 * If we get here we have accumulated the entire mpa 1589 * start reply message including private data. 1590 */ 1591 ep->mpa_attr.initiator = 0; 1592 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; 1593 ep->mpa_attr.recv_marker_enabled = markers_enabled; 1594 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; 1595 ep->mpa_attr.version = mpa->revision; 1596 if (mpa->revision == 1) 1597 ep->tried_with_mpa_v1 = 1; 1598 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; 1599 1600 if (mpa->revision == 2) { 1601 ep->mpa_attr.enhanced_rdma_conn = 1602 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0; 1603 if (ep->mpa_attr.enhanced_rdma_conn) { 1604 mpa_v2_params = (struct mpa_v2_conn_params *) 1605 (ep->mpa_pkt + sizeof(*mpa)); 1606 ep->ird = ntohs(mpa_v2_params->ird) & 1607 MPA_V2_IRD_ORD_MASK; 1608 ep->ord = ntohs(mpa_v2_params->ord) & 1609 MPA_V2_IRD_ORD_MASK; 1610 PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird, 1611 ep->ord); 1612 if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL) 1613 if (peer2peer) { 1614 if (ntohs(mpa_v2_params->ord) & 1615 MPA_V2_RDMA_WRITE_RTR) 1616 ep->mpa_attr.p2p_type = 1617 FW_RI_INIT_P2PTYPE_RDMA_WRITE; 1618 else if (ntohs(mpa_v2_params->ord) & 1619 MPA_V2_RDMA_READ_RTR) 1620 ep->mpa_attr.p2p_type = 1621 FW_RI_INIT_P2PTYPE_READ_REQ; 1622 } 1623 } 1624 } else if (mpa->revision == 1) 1625 if (peer2peer) 1626 ep->mpa_attr.p2p_type = p2p_type; 1627 1628 PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " 1629 "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__, 1630 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, 1631 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version, 1632 ep->mpa_attr.p2p_type); 1633 1634 /* 1635 * If the endpoint timer already expired, then we ignore 1636 * the start request. process_timeout() will abort 1637 * the connection. 1638 */ 1639 if (!stop_ep_timer(ep)) { 1640 __state_set(&ep->com, MPA_REQ_RCVD); 1641 1642 /* drive upcall */ 1643 mutex_lock(&ep->parent_ep->com.mutex); 1644 if (ep->parent_ep->com.state != DEAD) { 1645 if (connect_request_upcall(ep)) 1646 abort_connection(ep, skb, GFP_KERNEL); 1647 } else { 1648 abort_connection(ep, skb, GFP_KERNEL); 1649 } 1650 mutex_unlock(&ep->parent_ep->com.mutex); 1651 } 1652 return; 1653} 1654 1655static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb) 1656{ 1657 struct c4iw_ep *ep; 1658 struct cpl_rx_data *hdr = cplhdr(skb); 1659 unsigned int dlen = ntohs(hdr->len); 1660 unsigned int tid = GET_TID(hdr); 1661 struct tid_info *t = dev->rdev.lldi.tids; 1662 __u8 status = hdr->status; 1663 int disconnect = 0; 1664 1665 ep = lookup_tid(t, tid); 1666 if (!ep) 1667 return 0; 1668 PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen); 1669 skb_pull(skb, sizeof(*hdr)); 1670 skb_trim(skb, dlen); 1671 mutex_lock(&ep->com.mutex); 1672 1673 /* update RX credits */ 1674 update_rx_credits(ep, dlen); 1675 1676 switch (ep->com.state) { 1677 case MPA_REQ_SENT: 1678 ep->rcv_seq += dlen; 1679 disconnect = process_mpa_reply(ep, skb); 1680 break; 1681 case MPA_REQ_WAIT: 1682 ep->rcv_seq += dlen; 1683 process_mpa_request(ep, skb); 1684 break; 1685 case FPDU_MODE: { 1686 struct c4iw_qp_attributes attrs; 1687 BUG_ON(!ep->com.qp); 1688 if (status) 1689 pr_err("%s Unexpected streaming data." \ 1690 " qpid %u ep %p state %d tid %u status %d\n", 1691 __func__, ep->com.qp->wq.sq.qid, ep, 1692 ep->com.state, ep->hwtid, status); 1693 attrs.next_state = C4IW_QP_STATE_TERMINATE; 1694 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 1695 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 1696 disconnect = 1; 1697 break; 1698 } 1699 default: 1700 break; 1701 } 1702 mutex_unlock(&ep->com.mutex); 1703 if (disconnect) 1704 c4iw_ep_disconnect(ep, 0, GFP_KERNEL); 1705 return 0; 1706} 1707 1708static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 1709{ 1710 struct c4iw_ep *ep; 1711 struct cpl_abort_rpl_rss *rpl = cplhdr(skb); 1712 int release = 0; 1713 unsigned int tid = GET_TID(rpl); 1714 struct tid_info *t = dev->rdev.lldi.tids; 1715 1716 ep = lookup_tid(t, tid); 1717 if (!ep) { 1718 printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n"); 1719 return 0; 1720 } 1721 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 1722 mutex_lock(&ep->com.mutex); 1723 switch (ep->com.state) { 1724 case ABORTING: 1725 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); 1726 __state_set(&ep->com, DEAD); 1727 release = 1; 1728 break; 1729 default: 1730 printk(KERN_ERR "%s ep %p state %d\n", 1731 __func__, ep, ep->com.state); 1732 break; 1733 } 1734 mutex_unlock(&ep->com.mutex); 1735 1736 if (release) 1737 release_ep_resources(ep); 1738 return 0; 1739} 1740 1741static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid) 1742{ 1743 struct sk_buff *skb; 1744 struct fw_ofld_connection_wr *req; 1745 unsigned int mtu_idx; 1746 int wscale; 1747 struct sockaddr_in *sin; 1748 int win; 1749 1750 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); 1751 req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req)); 1752 memset(req, 0, sizeof(*req)); 1753 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR)); 1754 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16))); 1755 req->le.filter = cpu_to_be32(cxgb4_select_ntuple( 1756 ep->com.dev->rdev.lldi.ports[0], 1757 ep->l2t)); 1758 sin = (struct sockaddr_in *)&ep->com.mapped_local_addr; 1759 req->le.lport = sin->sin_port; 1760 req->le.u.ipv4.lip = sin->sin_addr.s_addr; 1761 sin = (struct sockaddr_in *)&ep->com.mapped_remote_addr; 1762 req->le.pport = sin->sin_port; 1763 req->le.u.ipv4.pip = sin->sin_addr.s_addr; 1764 req->tcb.t_state_to_astid = 1765 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_SENT) | 1766 V_FW_OFLD_CONNECTION_WR_ASTID(atid)); 1767 req->tcb.cplrxdataack_cplpassacceptrpl = 1768 htons(F_FW_OFLD_CONNECTION_WR_CPLRXDATAACK); 1769 req->tcb.tx_max = (__force __be32) jiffies; 1770 req->tcb.rcv_adv = htons(1); 1771 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx, 1772 enable_tcp_timestamps, 1773 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1); 1774 wscale = compute_wscale(rcv_win); 1775 1776 /* 1777 * Specify the largest window that will fit in opt0. The 1778 * remainder will be specified in the rx_data_ack. 1779 */ 1780 win = ep->rcv_win >> 10; 1781 if (win > RCV_BUFSIZ_MASK) 1782 win = RCV_BUFSIZ_MASK; 1783 1784 req->tcb.opt0 = (__force __be64) (TCAM_BYPASS(1) | 1785 (nocong ? NO_CONG(1) : 0) | 1786 KEEP_ALIVE(1) | 1787 DELACK(1) | 1788 WND_SCALE(wscale) | 1789 MSS_IDX(mtu_idx) | 1790 L2T_IDX(ep->l2t->idx) | 1791 TX_CHAN(ep->tx_chan) | 1792 SMAC_SEL(ep->smac_idx) | 1793 DSCP(ep->tos) | 1794 ULP_MODE(ULP_MODE_TCPDDP) | 1795 RCV_BUFSIZ(win)); 1796 req->tcb.opt2 = (__force __be32) (PACE(1) | 1797 TX_QUEUE(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) | 1798 RX_CHANNEL(0) | 1799 CCTRL_ECN(enable_ecn) | 1800 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid)); 1801 if (enable_tcp_timestamps) 1802 req->tcb.opt2 |= (__force __be32) TSTAMPS_EN(1); 1803 if (enable_tcp_sack) 1804 req->tcb.opt2 |= (__force __be32) SACK_EN(1); 1805 if (wscale && enable_tcp_window_scaling) 1806 req->tcb.opt2 |= (__force __be32) WND_SCALE_EN(1); 1807 req->tcb.opt0 = cpu_to_be64((__force u64) req->tcb.opt0); 1808 req->tcb.opt2 = cpu_to_be32((__force u32) req->tcb.opt2); 1809 set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx); 1810 set_bit(ACT_OFLD_CONN, &ep->com.history); 1811 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 1812} 1813 1814/* 1815 * Return whether a failed active open has allocated a TID 1816 */ 1817static inline int act_open_has_tid(int status) 1818{ 1819 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST && 1820 status != CPL_ERR_ARP_MISS; 1821} 1822 1823/* Returns whether a CPL status conveys negative advice. 1824 */ 1825static int is_neg_adv(unsigned int status) 1826{ 1827 return status == CPL_ERR_RTX_NEG_ADVICE || 1828 status == CPL_ERR_PERSIST_NEG_ADVICE || 1829 status == CPL_ERR_KEEPALV_NEG_ADVICE; 1830} 1831 1832static char *neg_adv_str(unsigned int status) 1833{ 1834 switch (status) { 1835 case CPL_ERR_RTX_NEG_ADVICE: 1836 return "Retransmit timeout"; 1837 case CPL_ERR_PERSIST_NEG_ADVICE: 1838 return "Persist timeout"; 1839 case CPL_ERR_KEEPALV_NEG_ADVICE: 1840 return "Keepalive timeout"; 1841 default: 1842 return "Unknown"; 1843 } 1844} 1845 1846static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi) 1847{ 1848 ep->snd_win = snd_win; 1849 ep->rcv_win = rcv_win; 1850 PDBG("%s snd_win %d rcv_win %d\n", __func__, ep->snd_win, ep->rcv_win); 1851} 1852 1853#define ACT_OPEN_RETRY_COUNT 2 1854 1855static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip, 1856 struct dst_entry *dst, struct c4iw_dev *cdev, 1857 bool clear_mpa_v1) 1858{ 1859 struct neighbour *n; 1860 int err, step; 1861 struct net_device *pdev; 1862 1863 n = dst_neigh_lookup(dst, peer_ip); 1864 if (!n) 1865 return -ENODEV; 1866 1867 rcu_read_lock(); 1868 err = -ENOMEM; 1869 if (n->dev->flags & IFF_LOOPBACK) { 1870 if (iptype == 4) 1871 pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip); 1872 else if (IS_ENABLED(CONFIG_IPV6)) 1873 for_each_netdev(&init_net, pdev) { 1874 if (ipv6_chk_addr(&init_net, 1875 (struct in6_addr *)peer_ip, 1876 pdev, 1)) 1877 break; 1878 } 1879 else 1880 pdev = NULL; 1881 1882 if (!pdev) { 1883 err = -ENODEV; 1884 goto out; 1885 } 1886 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t, 1887 n, pdev, 0); 1888 if (!ep->l2t) 1889 goto out; 1890 ep->mtu = pdev->mtu; 1891 ep->tx_chan = cxgb4_port_chan(pdev); 1892 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1; 1893 step = cdev->rdev.lldi.ntxq / 1894 cdev->rdev.lldi.nchan; 1895 ep->txq_idx = cxgb4_port_idx(pdev) * step; 1896 step = cdev->rdev.lldi.nrxq / 1897 cdev->rdev.lldi.nchan; 1898 ep->ctrlq_idx = cxgb4_port_idx(pdev); 1899 ep->rss_qid = cdev->rdev.lldi.rxq_ids[ 1900 cxgb4_port_idx(pdev) * step]; 1901 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev)); 1902 dev_put(pdev); 1903 } else { 1904 pdev = get_real_dev(n->dev); 1905 ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t, 1906 n, pdev, 0); 1907 if (!ep->l2t) 1908 goto out; 1909 ep->mtu = dst_mtu(dst); 1910 ep->tx_chan = cxgb4_port_chan(pdev); 1911 ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1; 1912 step = cdev->rdev.lldi.ntxq / 1913 cdev->rdev.lldi.nchan; 1914 ep->txq_idx = cxgb4_port_idx(pdev) * step; 1915 ep->ctrlq_idx = cxgb4_port_idx(pdev); 1916 step = cdev->rdev.lldi.nrxq / 1917 cdev->rdev.lldi.nchan; 1918 ep->rss_qid = cdev->rdev.lldi.rxq_ids[ 1919 cxgb4_port_idx(pdev) * step]; 1920 set_tcp_window(ep, (struct port_info *)netdev_priv(pdev)); 1921 1922 if (clear_mpa_v1) { 1923 ep->retry_with_mpa_v1 = 0; 1924 ep->tried_with_mpa_v1 = 0; 1925 } 1926 } 1927 err = 0; 1928out: 1929 rcu_read_unlock(); 1930 1931 neigh_release(n); 1932 1933 return err; 1934} 1935 1936static int c4iw_reconnect(struct c4iw_ep *ep) 1937{ 1938 int err = 0; 1939 struct sockaddr_in *laddr = (struct sockaddr_in *) 1940 &ep->com.cm_id->local_addr; 1941 struct sockaddr_in *raddr = (struct sockaddr_in *) 1942 &ep->com.cm_id->remote_addr; 1943 struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *) 1944 &ep->com.cm_id->local_addr; 1945 struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *) 1946 &ep->com.cm_id->remote_addr; 1947 int iptype; 1948 __u8 *ra; 1949 1950 PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id); 1951 init_timer(&ep->timer); 1952 1953 /* 1954 * Allocate an active TID to initiate a TCP connection. 1955 */ 1956 ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep); 1957 if (ep->atid == -1) { 1958 pr_err("%s - cannot alloc atid.\n", __func__); 1959 err = -ENOMEM; 1960 goto fail2; 1961 } 1962 insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid); 1963 1964 /* find a route */ 1965 if (ep->com.cm_id->local_addr.ss_family == AF_INET) { 1966 ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr, 1967 raddr->sin_addr.s_addr, laddr->sin_port, 1968 raddr->sin_port, 0); 1969 iptype = 4; 1970 ra = (__u8 *)&raddr->sin_addr; 1971 } else { 1972 ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr, 1973 raddr6->sin6_addr.s6_addr, 1974 laddr6->sin6_port, raddr6->sin6_port, 0, 1975 raddr6->sin6_scope_id); 1976 iptype = 6; 1977 ra = (__u8 *)&raddr6->sin6_addr; 1978 } 1979 if (!ep->dst) { 1980 pr_err("%s - cannot find route.\n", __func__); 1981 err = -EHOSTUNREACH; 1982 goto fail3; 1983 } 1984 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false); 1985 if (err) { 1986 pr_err("%s - cannot alloc l2e.\n", __func__); 1987 goto fail4; 1988 } 1989 1990 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n", 1991 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid, 1992 ep->l2t->idx); 1993 1994 state_set(&ep->com, CONNECTING); 1995 ep->tos = 0; 1996 1997 /* send connect request to rnic */ 1998 err = send_connect(ep); 1999 if (!err) 2000 goto out; 2001 2002 cxgb4_l2t_release(ep->l2t); 2003fail4: 2004 dst_release(ep->dst); 2005fail3: 2006 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid); 2007 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid); 2008fail2: 2009 /* 2010 * remember to send notification to upper layer. 2011 * We are in here so the upper layer is not aware that this is 2012 * re-connect attempt and so, upper layer is still waiting for 2013 * response of 1st connect request. 2014 */ 2015 connect_reply_upcall(ep, -ECONNRESET); 2016 c4iw_put_ep(&ep->com); 2017out: 2018 return err; 2019} 2020 2021static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 2022{ 2023 struct c4iw_ep *ep; 2024 struct cpl_act_open_rpl *rpl = cplhdr(skb); 2025 unsigned int atid = GET_TID_TID(GET_AOPEN_ATID( 2026 ntohl(rpl->atid_status))); 2027 struct tid_info *t = dev->rdev.lldi.tids; 2028 int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status)); 2029 struct sockaddr_in *la; 2030 struct sockaddr_in *ra; 2031 struct sockaddr_in6 *la6; 2032 struct sockaddr_in6 *ra6; 2033 2034 ep = lookup_atid(t, atid); 2035 la = (struct sockaddr_in *)&ep->com.mapped_local_addr; 2036 ra = (struct sockaddr_in *)&ep->com.mapped_remote_addr; 2037 la6 = (struct sockaddr_in6 *)&ep->com.mapped_local_addr; 2038 ra6 = (struct sockaddr_in6 *)&ep->com.mapped_remote_addr; 2039 2040 PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid, 2041 status, status2errno(status)); 2042 2043 if (is_neg_adv(status)) { 2044 dev_warn(&dev->rdev.lldi.pdev->dev, 2045 "Connection problems for atid %u status %u (%s)\n", 2046 atid, status, neg_adv_str(status)); 2047 return 0; 2048 } 2049 2050 set_bit(ACT_OPEN_RPL, &ep->com.history); 2051 2052 /* 2053 * Log interesting failures. 2054 */ 2055 switch (status) { 2056 case CPL_ERR_CONN_RESET: 2057 case CPL_ERR_CONN_TIMEDOUT: 2058 break; 2059 case CPL_ERR_TCAM_FULL: 2060 mutex_lock(&dev->rdev.stats.lock); 2061 dev->rdev.stats.tcam_full++; 2062 mutex_unlock(&dev->rdev.stats.lock); 2063 if (ep->com.local_addr.ss_family == AF_INET && 2064 dev->rdev.lldi.enable_fw_ofld_conn) { 2065 send_fw_act_open_req(ep, 2066 GET_TID_TID(GET_AOPEN_ATID( 2067 ntohl(rpl->atid_status)))); 2068 return 0; 2069 } 2070 break; 2071 case CPL_ERR_CONN_EXIST: 2072 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) { 2073 set_bit(ACT_RETRY_INUSE, &ep->com.history); 2074 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, 2075 atid); 2076 cxgb4_free_atid(t, atid); 2077 dst_release(ep->dst); 2078 cxgb4_l2t_release(ep->l2t); 2079 c4iw_reconnect(ep); 2080 return 0; 2081 } 2082 break; 2083 default: 2084 if (ep->com.local_addr.ss_family == AF_INET) { 2085 pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n", 2086 atid, status, status2errno(status), 2087 &la->sin_addr.s_addr, ntohs(la->sin_port), 2088 &ra->sin_addr.s_addr, ntohs(ra->sin_port)); 2089 } else { 2090 pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n", 2091 atid, status, status2errno(status), 2092 la6->sin6_addr.s6_addr, ntohs(la6->sin6_port), 2093 ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port)); 2094 } 2095 break; 2096 } 2097 2098 connect_reply_upcall(ep, status2errno(status)); 2099 state_set(&ep->com, DEAD); 2100 2101 if (status && act_open_has_tid(status)) 2102 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl)); 2103 2104 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid); 2105 cxgb4_free_atid(t, atid); 2106 dst_release(ep->dst); 2107 cxgb4_l2t_release(ep->l2t); 2108 c4iw_put_ep(&ep->com); 2109 2110 return 0; 2111} 2112 2113static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 2114{ 2115 struct cpl_pass_open_rpl *rpl = cplhdr(skb); 2116 struct tid_info *t = dev->rdev.lldi.tids; 2117 unsigned int stid = GET_TID(rpl); 2118 struct c4iw_listen_ep *ep = lookup_stid(t, stid); 2119 2120 if (!ep) { 2121 PDBG("%s stid %d lookup failure!\n", __func__, stid); 2122 goto out; 2123 } 2124 PDBG("%s ep %p status %d error %d\n", __func__, ep, 2125 rpl->status, status2errno(rpl->status)); 2126 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status)); 2127 2128out: 2129 return 0; 2130} 2131 2132static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 2133{ 2134 struct cpl_close_listsvr_rpl *rpl = cplhdr(skb); 2135 struct tid_info *t = dev->rdev.lldi.tids; 2136 unsigned int stid = GET_TID(rpl); 2137 struct c4iw_listen_ep *ep = lookup_stid(t, stid); 2138 2139 PDBG("%s ep %p\n", __func__, ep); 2140 c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status)); 2141 return 0; 2142} 2143 2144static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb, 2145 struct cpl_pass_accept_req *req) 2146{ 2147 struct cpl_pass_accept_rpl *rpl; 2148 unsigned int mtu_idx; 2149 u64 opt0; 2150 u32 opt2; 2151 int wscale; 2152 struct cpl_t5_pass_accept_rpl *rpl5 = NULL; 2153 int win; 2154 2155 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 2156 BUG_ON(skb_cloned(skb)); 2157 2158 skb_get(skb); 2159 rpl = cplhdr(skb); 2160 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) { 2161 skb_trim(skb, roundup(sizeof(*rpl5), 16)); 2162 rpl5 = (void *)rpl; 2163 INIT_TP_WR(rpl5, ep->hwtid); 2164 } else { 2165 skb_trim(skb, sizeof(*rpl)); 2166 INIT_TP_WR(rpl, ep->hwtid); 2167 } 2168 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, 2169 ep->hwtid)); 2170 2171 best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx, 2172 enable_tcp_timestamps && req->tcpopt.tstamp, 2173 (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1); 2174 wscale = compute_wscale(rcv_win); 2175 2176 /* 2177 * Specify the largest window that will fit in opt0. The 2178 * remainder will be specified in the rx_data_ack. 2179 */ 2180 win = ep->rcv_win >> 10; 2181 if (win > RCV_BUFSIZ_MASK) 2182 win = RCV_BUFSIZ_MASK; 2183 opt0 = (nocong ? NO_CONG(1) : 0) | 2184 KEEP_ALIVE(1) | 2185 DELACK(1) | 2186 WND_SCALE(wscale) | 2187 MSS_IDX(mtu_idx) | 2188 L2T_IDX(ep->l2t->idx) | 2189 TX_CHAN(ep->tx_chan) | 2190 SMAC_SEL(ep->smac_idx) | 2191 DSCP(ep->tos >> 2) | 2192 ULP_MODE(ULP_MODE_TCPDDP) | 2193 RCV_BUFSIZ(win); 2194 opt2 = RX_CHANNEL(0) | 2195 RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid); 2196 2197 if (enable_tcp_timestamps && req->tcpopt.tstamp) 2198 opt2 |= TSTAMPS_EN(1); 2199 if (enable_tcp_sack && req->tcpopt.sack) 2200 opt2 |= SACK_EN(1); 2201 if (wscale && enable_tcp_window_scaling) 2202 opt2 |= WND_SCALE_EN(1); 2203 if (enable_ecn) { 2204 const struct tcphdr *tcph; 2205 u32 hlen = ntohl(req->hdr_len); 2206 2207 tcph = (const void *)(req + 1) + G_ETH_HDR_LEN(hlen) + 2208 G_IP_HDR_LEN(hlen); 2209 if (tcph->ece && tcph->cwr) 2210 opt2 |= CCTRL_ECN(1); 2211 } 2212 if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) { 2213 u32 isn = (prandom_u32() & ~7UL) - 1; 2214 opt2 |= T5_OPT_2_VALID; 2215 opt2 |= V_CONG_CNTRL(CONG_ALG_TAHOE); 2216 opt2 |= CONG_CNTRL_VALID; /* OPT_2_ISS for T5 */ 2217 rpl5 = (void *)rpl; 2218 memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16)); 2219 if (peer2peer) 2220 isn += 4; 2221 rpl5->iss = cpu_to_be32(isn); 2222 PDBG("%s iss %u\n", __func__, be32_to_cpu(rpl5->iss)); 2223 } 2224 2225 rpl->opt0 = cpu_to_be64(opt0); 2226 rpl->opt2 = cpu_to_be32(opt2); 2227 set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx); 2228 t4_set_arp_err_handler(skb, NULL, arp_failure_discard); 2229 c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); 2230 2231 return; 2232} 2233 2234static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb) 2235{ 2236 PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid); 2237 BUG_ON(skb_cloned(skb)); 2238 skb_trim(skb, sizeof(struct cpl_tid_release)); 2239 release_tid(&dev->rdev, hwtid, skb); 2240 return; 2241} 2242 2243static void get_4tuple(struct cpl_pass_accept_req *req, int *iptype, 2244 __u8 *local_ip, __u8 *peer_ip, 2245 __be16 *local_port, __be16 *peer_port) 2246{ 2247 int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len)); 2248 int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len)); 2249 struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len); 2250 struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len); 2251 struct tcphdr *tcp = (struct tcphdr *) 2252 ((u8 *)(req + 1) + eth_len + ip_len); 2253 2254 if (ip->version == 4) { 2255 PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__, 2256 ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source), 2257 ntohs(tcp->dest)); 2258 *iptype = 4; 2259 memcpy(peer_ip, &ip->saddr, 4); 2260 memcpy(local_ip, &ip->daddr, 4); 2261 } else { 2262 PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__, 2263 ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source), 2264 ntohs(tcp->dest)); 2265 *iptype = 6; 2266 memcpy(peer_ip, ip6->saddr.s6_addr, 16); 2267 memcpy(local_ip, ip6->daddr.s6_addr, 16); 2268 } 2269 *peer_port = tcp->source; 2270 *local_port = tcp->dest; 2271 2272 return; 2273} 2274 2275static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb) 2276{ 2277 struct c4iw_ep *child_ep = NULL, *parent_ep; 2278 struct cpl_pass_accept_req *req = cplhdr(skb); 2279 unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid)); 2280 struct tid_info *t = dev->rdev.lldi.tids; 2281 unsigned int hwtid = GET_TID(req); 2282 struct dst_entry *dst; 2283 __u8 local_ip[16], peer_ip[16]; 2284 __be16 local_port, peer_port; 2285 int err; 2286 u16 peer_mss = ntohs(req->tcpopt.mss); 2287 int iptype; 2288 unsigned short hdrs; 2289 2290 parent_ep = lookup_stid(t, stid); 2291 if (!parent_ep) { 2292 PDBG("%s connect request on invalid stid %d\n", __func__, stid); 2293 goto reject; 2294 } 2295 2296 if (state_read(&parent_ep->com) != LISTEN) { 2297 printk(KERN_ERR "%s - listening ep not in LISTEN\n", 2298 __func__); 2299 goto reject; 2300 } 2301 2302 get_4tuple(req, &iptype, local_ip, peer_ip, &local_port, &peer_port); 2303 2304 /* Find output route */ 2305 if (iptype == 4) { 2306 PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n" 2307 , __func__, parent_ep, hwtid, 2308 local_ip, peer_ip, ntohs(local_port), 2309 ntohs(peer_port), peer_mss); 2310 dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip, 2311 local_port, peer_port, 2312 GET_POPEN_TOS(ntohl(req->tos_stid))); 2313 } else { 2314 PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n" 2315 , __func__, parent_ep, hwtid, 2316 local_ip, peer_ip, ntohs(local_port), 2317 ntohs(peer_port), peer_mss); 2318 dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port, 2319 PASS_OPEN_TOS(ntohl(req->tos_stid)), 2320 ((struct sockaddr_in6 *) 2321 &parent_ep->com.local_addr)->sin6_scope_id); 2322 } 2323 if (!dst) { 2324 printk(KERN_ERR MOD "%s - failed to find dst entry!\n", 2325 __func__); 2326 goto reject; 2327 } 2328 2329 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL); 2330 if (!child_ep) { 2331 printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n", 2332 __func__); 2333 dst_release(dst); 2334 goto reject; 2335 } 2336 2337 err = import_ep(child_ep, iptype, peer_ip, dst, dev, false); 2338 if (err) { 2339 printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n", 2340 __func__); 2341 dst_release(dst); 2342 kfree(child_ep); 2343 goto reject; 2344 } 2345 2346 hdrs = sizeof(struct iphdr) + sizeof(struct tcphdr) + 2347 ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0); 2348 if (peer_mss && child_ep->mtu > (peer_mss + hdrs)) 2349 child_ep->mtu = peer_mss + hdrs; 2350 2351 state_set(&child_ep->com, CONNECTING); 2352 child_ep->com.dev = dev; 2353 child_ep->com.cm_id = NULL; 2354 if (iptype == 4) { 2355 struct sockaddr_in *sin = (struct sockaddr_in *) 2356 &child_ep->com.local_addr; 2357 sin->sin_family = PF_INET; 2358 sin->sin_port = local_port; 2359 sin->sin_addr.s_addr = *(__be32 *)local_ip; 2360 sin = (struct sockaddr_in *)&child_ep->com.remote_addr; 2361 sin->sin_family = PF_INET; 2362 sin->sin_port = peer_port; 2363 sin->sin_addr.s_addr = *(__be32 *)peer_ip; 2364 } else { 2365 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) 2366 &child_ep->com.local_addr; 2367 sin6->sin6_family = PF_INET6; 2368 sin6->sin6_port = local_port; 2369 memcpy(sin6->sin6_addr.s6_addr, local_ip, 16); 2370 sin6 = (struct sockaddr_in6 *)&child_ep->com.remote_addr; 2371 sin6->sin6_family = PF_INET6; 2372 sin6->sin6_port = peer_port; 2373 memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16); 2374 } 2375 c4iw_get_ep(&parent_ep->com); 2376 child_ep->parent_ep = parent_ep; 2377 child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid)); 2378 child_ep->dst = dst; 2379 child_ep->hwtid = hwtid; 2380 2381 PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__, 2382 child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid); 2383 2384 init_timer(&child_ep->timer); 2385 cxgb4_insert_tid(t, child_ep, hwtid); 2386 insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid); 2387 accept_cr(child_ep, skb, req); 2388 set_bit(PASS_ACCEPT_REQ, &child_ep->com.history); 2389 goto out; 2390reject: 2391 reject_cr(dev, hwtid, skb); 2392out: 2393 return 0; 2394} 2395 2396static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb) 2397{ 2398 struct c4iw_ep *ep; 2399 struct cpl_pass_establish *req = cplhdr(skb); 2400 struct tid_info *t = dev->rdev.lldi.tids; 2401 unsigned int tid = GET_TID(req); 2402 2403 ep = lookup_tid(t, tid); 2404 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 2405 ep->snd_seq = be32_to_cpu(req->snd_isn); 2406 ep->rcv_seq = be32_to_cpu(req->rcv_isn); 2407 2408 PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid, 2409 ntohs(req->tcp_opt)); 2410 2411 set_emss(ep, ntohs(req->tcp_opt)); 2412 2413 dst_confirm(ep->dst); 2414 state_set(&ep->com, MPA_REQ_WAIT); 2415 start_ep_timer(ep); 2416 send_flowc(ep, skb); 2417 set_bit(PASS_ESTAB, &ep->com.history); 2418 2419 return 0; 2420} 2421 2422static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb) 2423{ 2424 struct cpl_peer_close *hdr = cplhdr(skb); 2425 struct c4iw_ep *ep; 2426 struct c4iw_qp_attributes attrs; 2427 int disconnect = 1; 2428 int release = 0; 2429 struct tid_info *t = dev->rdev.lldi.tids; 2430 unsigned int tid = GET_TID(hdr); 2431 int ret; 2432 2433 ep = lookup_tid(t, tid); 2434 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 2435 dst_confirm(ep->dst); 2436 2437 set_bit(PEER_CLOSE, &ep->com.history); 2438 mutex_lock(&ep->com.mutex); 2439 switch (ep->com.state) { 2440 case MPA_REQ_WAIT: 2441 __state_set(&ep->com, CLOSING); 2442 break; 2443 case MPA_REQ_SENT: 2444 __state_set(&ep->com, CLOSING); 2445 connect_reply_upcall(ep, -ECONNRESET); 2446 break; 2447 case MPA_REQ_RCVD: 2448 2449 /* 2450 * We're gonna mark this puppy DEAD, but keep 2451 * the reference on it until the ULP accepts or 2452 * rejects the CR. Also wake up anyone waiting 2453 * in rdma connection migration (see c4iw_accept_cr()). 2454 */ 2455 __state_set(&ep->com, CLOSING); 2456 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid); 2457 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); 2458 break; 2459 case MPA_REP_SENT: 2460 __state_set(&ep->com, CLOSING); 2461 PDBG("waking up ep %p tid %u\n", ep, ep->hwtid); 2462 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); 2463 break; 2464 case FPDU_MODE: 2465 start_ep_timer(ep); 2466 __state_set(&ep->com, CLOSING); 2467 attrs.next_state = C4IW_QP_STATE_CLOSING; 2468 ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 2469 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 2470 if (ret != -ECONNRESET) { 2471 peer_close_upcall(ep); 2472 disconnect = 1; 2473 } 2474 break; 2475 case ABORTING: 2476 disconnect = 0; 2477 break; 2478 case CLOSING: 2479 __state_set(&ep->com, MORIBUND); 2480 disconnect = 0; 2481 break; 2482 case MORIBUND: 2483 (void)stop_ep_timer(ep); 2484 if (ep->com.cm_id && ep->com.qp) { 2485 attrs.next_state = C4IW_QP_STATE_IDLE; 2486 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 2487 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 2488 } 2489 close_complete_upcall(ep, 0); 2490 __state_set(&ep->com, DEAD); 2491 release = 1; 2492 disconnect = 0; 2493 break; 2494 case DEAD: 2495 disconnect = 0; 2496 break; 2497 default: 2498 BUG_ON(1); 2499 } 2500 mutex_unlock(&ep->com.mutex); 2501 if (disconnect) 2502 c4iw_ep_disconnect(ep, 0, GFP_KERNEL); 2503 if (release) 2504 release_ep_resources(ep); 2505 return 0; 2506} 2507 2508static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb) 2509{ 2510 struct cpl_abort_req_rss *req = cplhdr(skb); 2511 struct c4iw_ep *ep; 2512 struct cpl_abort_rpl *rpl; 2513 struct sk_buff *rpl_skb; 2514 struct c4iw_qp_attributes attrs; 2515 int ret; 2516 int release = 0; 2517 struct tid_info *t = dev->rdev.lldi.tids; 2518 unsigned int tid = GET_TID(req); 2519 2520 ep = lookup_tid(t, tid); 2521 if (is_neg_adv(req->status)) { 2522 dev_warn(&dev->rdev.lldi.pdev->dev, 2523 "Negative advice on abort - tid %u status %d (%s)\n", 2524 ep->hwtid, req->status, neg_adv_str(req->status)); 2525 return 0; 2526 } 2527 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid, 2528 ep->com.state); 2529 set_bit(PEER_ABORT, &ep->com.history); 2530 2531 /* 2532 * Wake up any threads in rdma_init() or rdma_fini(). 2533 * However, this is not needed if com state is just 2534 * MPA_REQ_SENT 2535 */ 2536 if (ep->com.state != MPA_REQ_SENT) 2537 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); 2538 2539 mutex_lock(&ep->com.mutex); 2540 switch (ep->com.state) { 2541 case CONNECTING: 2542 break; 2543 case MPA_REQ_WAIT: 2544 (void)stop_ep_timer(ep); 2545 break; 2546 case MPA_REQ_SENT: 2547 (void)stop_ep_timer(ep); 2548 if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1)) 2549 connect_reply_upcall(ep, -ECONNRESET); 2550 else { 2551 /* 2552 * we just don't send notification upwards because we 2553 * want to retry with mpa_v1 without upper layers even 2554 * knowing it. 2555 * 2556 * do some housekeeping so as to re-initiate the 2557 * connection 2558 */ 2559 PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__, 2560 mpa_rev); 2561 ep->retry_with_mpa_v1 = 1; 2562 } 2563 break; 2564 case MPA_REP_SENT: 2565 break; 2566 case MPA_REQ_RCVD: 2567 break; 2568 case MORIBUND: 2569 case CLOSING: 2570 stop_ep_timer(ep); 2571 /*FALLTHROUGH*/ 2572 case FPDU_MODE: 2573 if (ep->com.cm_id && ep->com.qp) { 2574 attrs.next_state = C4IW_QP_STATE_ERROR; 2575 ret = c4iw_modify_qp(ep->com.qp->rhp, 2576 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, 2577 &attrs, 1); 2578 if (ret) 2579 printk(KERN_ERR MOD 2580 "%s - qp <- error failed!\n", 2581 __func__); 2582 } 2583 peer_abort_upcall(ep); 2584 break; 2585 case ABORTING: 2586 break; 2587 case DEAD: 2588 PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__); 2589 mutex_unlock(&ep->com.mutex); 2590 return 0; 2591 default: 2592 BUG_ON(1); 2593 break; 2594 } 2595 dst_confirm(ep->dst); 2596 if (ep->com.state != ABORTING) { 2597 __state_set(&ep->com, DEAD); 2598 /* we don't release if we want to retry with mpa_v1 */ 2599 if (!ep->retry_with_mpa_v1) 2600 release = 1; 2601 } 2602 mutex_unlock(&ep->com.mutex); 2603 2604 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL); 2605 if (!rpl_skb) { 2606 printk(KERN_ERR MOD "%s - cannot allocate skb!\n", 2607 __func__); 2608 release = 1; 2609 goto out; 2610 } 2611 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 2612 rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl)); 2613 INIT_TP_WR(rpl, ep->hwtid); 2614 OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid)); 2615 rpl->cmd = CPL_ABORT_NO_RST; 2616 c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb); 2617out: 2618 if (release) 2619 release_ep_resources(ep); 2620 else if (ep->retry_with_mpa_v1) { 2621 remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid); 2622 cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid); 2623 dst_release(ep->dst); 2624 cxgb4_l2t_release(ep->l2t); 2625 c4iw_reconnect(ep); 2626 } 2627 2628 return 0; 2629} 2630 2631static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 2632{ 2633 struct c4iw_ep *ep; 2634 struct c4iw_qp_attributes attrs; 2635 struct cpl_close_con_rpl *rpl = cplhdr(skb); 2636 int release = 0; 2637 struct tid_info *t = dev->rdev.lldi.tids; 2638 unsigned int tid = GET_TID(rpl); 2639 2640 ep = lookup_tid(t, tid); 2641 2642 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 2643 BUG_ON(!ep); 2644 2645 /* The cm_id may be null if we failed to connect */ 2646 mutex_lock(&ep->com.mutex); 2647 switch (ep->com.state) { 2648 case CLOSING: 2649 __state_set(&ep->com, MORIBUND); 2650 break; 2651 case MORIBUND: 2652 (void)stop_ep_timer(ep); 2653 if ((ep->com.cm_id) && (ep->com.qp)) { 2654 attrs.next_state = C4IW_QP_STATE_IDLE; 2655 c4iw_modify_qp(ep->com.qp->rhp, 2656 ep->com.qp, 2657 C4IW_QP_ATTR_NEXT_STATE, 2658 &attrs, 1); 2659 } 2660 close_complete_upcall(ep, 0); 2661 __state_set(&ep->com, DEAD); 2662 release = 1; 2663 break; 2664 case ABORTING: 2665 case DEAD: 2666 break; 2667 default: 2668 BUG_ON(1); 2669 break; 2670 } 2671 mutex_unlock(&ep->com.mutex); 2672 if (release) 2673 release_ep_resources(ep); 2674 return 0; 2675} 2676 2677static int terminate(struct c4iw_dev *dev, struct sk_buff *skb) 2678{ 2679 struct cpl_rdma_terminate *rpl = cplhdr(skb); 2680 struct tid_info *t = dev->rdev.lldi.tids; 2681 unsigned int tid = GET_TID(rpl); 2682 struct c4iw_ep *ep; 2683 struct c4iw_qp_attributes attrs; 2684 2685 ep = lookup_tid(t, tid); 2686 BUG_ON(!ep); 2687 2688 if (ep && ep->com.qp) { 2689 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid, 2690 ep->com.qp->wq.sq.qid); 2691 attrs.next_state = C4IW_QP_STATE_TERMINATE; 2692 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 2693 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 2694 } else 2695 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid); 2696 2697 return 0; 2698} 2699 2700/* 2701 * Upcall from the adapter indicating data has been transmitted. 2702 * For us its just the single MPA request or reply. We can now free 2703 * the skb holding the mpa message. 2704 */ 2705static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb) 2706{ 2707 struct c4iw_ep *ep; 2708 struct cpl_fw4_ack *hdr = cplhdr(skb); 2709 u8 credits = hdr->credits; 2710 unsigned int tid = GET_TID(hdr); 2711 struct tid_info *t = dev->rdev.lldi.tids; 2712 2713 2714 ep = lookup_tid(t, tid); 2715 PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits); 2716 if (credits == 0) { 2717 PDBG("%s 0 credit ack ep %p tid %u state %u\n", 2718 __func__, ep, ep->hwtid, state_read(&ep->com)); 2719 return 0; 2720 } 2721 2722 dst_confirm(ep->dst); 2723 if (ep->mpa_skb) { 2724 PDBG("%s last streaming msg ack ep %p tid %u state %u " 2725 "initiator %u freeing skb\n", __func__, ep, ep->hwtid, 2726 state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0); 2727 kfree_skb(ep->mpa_skb); 2728 ep->mpa_skb = NULL; 2729 } 2730 return 0; 2731} 2732 2733int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 2734{ 2735 int err = 0; 2736 int disconnect = 0; 2737 struct c4iw_ep *ep = to_ep(cm_id); 2738 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 2739 2740 mutex_lock(&ep->com.mutex); 2741 if (ep->com.state == DEAD) { 2742 mutex_unlock(&ep->com.mutex); 2743 c4iw_put_ep(&ep->com); 2744 return -ECONNRESET; 2745 } 2746 set_bit(ULP_REJECT, &ep->com.history); 2747 BUG_ON(ep->com.state != MPA_REQ_RCVD); 2748 if (mpa_rev == 0) 2749 abort_connection(ep, NULL, GFP_KERNEL); 2750 else { 2751 err = send_mpa_reject(ep, pdata, pdata_len); 2752 disconnect = 1; 2753 } 2754 mutex_unlock(&ep->com.mutex); 2755 if (disconnect) 2756 err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL); 2757 c4iw_put_ep(&ep->com); 2758 return 0; 2759} 2760 2761int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 2762{ 2763 int err; 2764 struct c4iw_qp_attributes attrs; 2765 enum c4iw_qp_attr_mask mask; 2766 struct c4iw_ep *ep = to_ep(cm_id); 2767 struct c4iw_dev *h = to_c4iw_dev(cm_id->device); 2768 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn); 2769 2770 PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); 2771 2772 mutex_lock(&ep->com.mutex); 2773 if (ep->com.state == DEAD) { 2774 err = -ECONNRESET; 2775 goto err; 2776 } 2777 2778 BUG_ON(ep->com.state != MPA_REQ_RCVD); 2779 BUG_ON(!qp); 2780 2781 set_bit(ULP_ACCEPT, &ep->com.history); 2782 if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) || 2783 (conn_param->ird > cur_max_read_depth(ep->com.dev))) { 2784 abort_connection(ep, NULL, GFP_KERNEL); 2785 err = -EINVAL; 2786 goto err; 2787 } 2788 2789 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 2790 if (conn_param->ord > ep->ird) { 2791 if (RELAXED_IRD_NEGOTIATION) { 2792 ep->ord = ep->ird; 2793 } else { 2794 ep->ird = conn_param->ird; 2795 ep->ord = conn_param->ord; 2796 send_mpa_reject(ep, conn_param->private_data, 2797 conn_param->private_data_len); 2798 abort_connection(ep, NULL, GFP_KERNEL); 2799 err = -ENOMEM; 2800 goto err; 2801 } 2802 } 2803 if (conn_param->ird < ep->ord) { 2804 if (RELAXED_IRD_NEGOTIATION && 2805 ep->ord <= h->rdev.lldi.max_ordird_qp) { 2806 conn_param->ird = ep->ord; 2807 } else { 2808 abort_connection(ep, NULL, GFP_KERNEL); 2809 err = -ENOMEM; 2810 goto err; 2811 } 2812 } 2813 } 2814 ep->ird = conn_param->ird; 2815 ep->ord = conn_param->ord; 2816 2817 if (ep->mpa_attr.version == 1) { 2818 if (peer2peer && ep->ird == 0) 2819 ep->ird = 1; 2820 } else { 2821 if (peer2peer && 2822 (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) && 2823 (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ord == 0) 2824 ep->ird = 1; 2825 } 2826 2827 PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord); 2828 2829 cm_id->add_ref(cm_id); 2830 ep->com.cm_id = cm_id; 2831 ep->com.qp = qp; 2832 ref_qp(ep); 2833 2834 /* bind QP to EP and move to RTS */ 2835 attrs.mpa_attr = ep->mpa_attr; 2836 attrs.max_ird = ep->ird; 2837 attrs.max_ord = ep->ord; 2838 attrs.llp_stream_handle = ep; 2839 attrs.next_state = C4IW_QP_STATE_RTS; 2840 2841 /* bind QP and TID with INIT_WR */ 2842 mask = C4IW_QP_ATTR_NEXT_STATE | 2843 C4IW_QP_ATTR_LLP_STREAM_HANDLE | 2844 C4IW_QP_ATTR_MPA_ATTR | 2845 C4IW_QP_ATTR_MAX_IRD | 2846 C4IW_QP_ATTR_MAX_ORD; 2847 2848 err = c4iw_modify_qp(ep->com.qp->rhp, 2849 ep->com.qp, mask, &attrs, 1); 2850 if (err) 2851 goto err1; 2852 err = send_mpa_reply(ep, conn_param->private_data, 2853 conn_param->private_data_len); 2854 if (err) 2855 goto err1; 2856 2857 __state_set(&ep->com, FPDU_MODE); 2858 established_upcall(ep); 2859 mutex_unlock(&ep->com.mutex); 2860 c4iw_put_ep(&ep->com); 2861 return 0; 2862err1: 2863 ep->com.cm_id = NULL; 2864 abort_connection(ep, NULL, GFP_KERNEL); 2865 cm_id->rem_ref(cm_id); 2866err: 2867 mutex_unlock(&ep->com.mutex); 2868 c4iw_put_ep(&ep->com); 2869 return err; 2870} 2871 2872static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id) 2873{ 2874 struct in_device *ind; 2875 int found = 0; 2876 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr; 2877 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr; 2878 2879 ind = in_dev_get(dev->rdev.lldi.ports[0]); 2880 if (!ind) 2881 return -EADDRNOTAVAIL; 2882 for_primary_ifa(ind) { 2883 laddr->sin_addr.s_addr = ifa->ifa_address; 2884 raddr->sin_addr.s_addr = ifa->ifa_address; 2885 found = 1; 2886 break; 2887 } 2888 endfor_ifa(ind); 2889 in_dev_put(ind); 2890 return found ? 0 : -EADDRNOTAVAIL; 2891} 2892 2893static int get_lladdr(struct net_device *dev, struct in6_addr *addr, 2894 unsigned char banned_flags) 2895{ 2896 struct inet6_dev *idev; 2897 int err = -EADDRNOTAVAIL; 2898 2899 rcu_read_lock(); 2900 idev = __in6_dev_get(dev); 2901 if (idev != NULL) { 2902 struct inet6_ifaddr *ifp; 2903 2904 read_lock_bh(&idev->lock); 2905 list_for_each_entry(ifp, &idev->addr_list, if_list) { 2906 if (ifp->scope == IFA_LINK && 2907 !(ifp->flags & banned_flags)) { 2908 memcpy(addr, &ifp->addr, 16); 2909 err = 0; 2910 break; 2911 } 2912 } 2913 read_unlock_bh(&idev->lock); 2914 } 2915 rcu_read_unlock(); 2916 return err; 2917} 2918 2919static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id) 2920{ 2921 struct in6_addr uninitialized_var(addr); 2922 struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->local_addr; 2923 struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->remote_addr; 2924 2925 if (get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) { 2926 memcpy(la6->sin6_addr.s6_addr, &addr, 16); 2927 memcpy(ra6->sin6_addr.s6_addr, &addr, 16); 2928 return 0; 2929 } 2930 return -EADDRNOTAVAIL; 2931} 2932 2933int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 2934{ 2935 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device); 2936 struct c4iw_ep *ep; 2937 int err = 0; 2938 struct sockaddr_in *laddr; 2939 struct sockaddr_in *raddr; 2940 struct sockaddr_in6 *laddr6; 2941 struct sockaddr_in6 *raddr6; 2942 struct iwpm_dev_data pm_reg_msg; 2943 struct iwpm_sa_data pm_msg; 2944 __u8 *ra; 2945 int iptype; 2946 int iwpm_err = 0; 2947 2948 if ((conn_param->ord > cur_max_read_depth(dev)) || 2949 (conn_param->ird > cur_max_read_depth(dev))) { 2950 err = -EINVAL; 2951 goto out; 2952 } 2953 ep = alloc_ep(sizeof(*ep), GFP_KERNEL); 2954 if (!ep) { 2955 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); 2956 err = -ENOMEM; 2957 goto out; 2958 } 2959 init_timer(&ep->timer); 2960 ep->plen = conn_param->private_data_len; 2961 if (ep->plen) 2962 memcpy(ep->mpa_pkt + sizeof(struct mpa_message), 2963 conn_param->private_data, ep->plen); 2964 ep->ird = conn_param->ird; 2965 ep->ord = conn_param->ord; 2966 2967 if (peer2peer && ep->ord == 0) 2968 ep->ord = 1; 2969 2970 cm_id->add_ref(cm_id); 2971 ep->com.dev = dev; 2972 ep->com.cm_id = cm_id; 2973 ep->com.qp = get_qhp(dev, conn_param->qpn); 2974 if (!ep->com.qp) { 2975 PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn); 2976 err = -EINVAL; 2977 goto fail1; 2978 } 2979 ref_qp(ep); 2980 PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn, 2981 ep->com.qp, cm_id); 2982 2983 /* 2984 * Allocate an active TID to initiate a TCP connection. 2985 */ 2986 ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep); 2987 if (ep->atid == -1) { 2988 printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); 2989 err = -ENOMEM; 2990 goto fail1; 2991 } 2992 insert_handle(dev, &dev->atid_idr, ep, ep->atid); 2993 2994 memcpy(&ep->com.local_addr, &cm_id->local_addr, 2995 sizeof(ep->com.local_addr)); 2996 memcpy(&ep->com.remote_addr, &cm_id->remote_addr, 2997 sizeof(ep->com.remote_addr)); 2998 2999 /* No port mapper available, go with the specified peer information */ 3000 memcpy(&ep->com.mapped_local_addr, &cm_id->local_addr, 3001 sizeof(ep->com.mapped_local_addr)); 3002 memcpy(&ep->com.mapped_remote_addr, &cm_id->remote_addr, 3003 sizeof(ep->com.mapped_remote_addr)); 3004 3005 c4iw_form_reg_msg(dev, &pm_reg_msg); 3006 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_C4IW); 3007 if (iwpm_err) { 3008 PDBG("%s: Port Mapper reg pid fail (err = %d).\n", 3009 __func__, iwpm_err); 3010 } 3011 if (iwpm_valid_pid() && !iwpm_err) { 3012 c4iw_form_pm_msg(ep, &pm_msg); 3013 iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_C4IW); 3014 if (iwpm_err) 3015 PDBG("%s: Port Mapper query fail (err = %d).\n", 3016 __func__, iwpm_err); 3017 else 3018 c4iw_record_pm_msg(ep, &pm_msg); 3019 } 3020 if (iwpm_create_mapinfo(&ep->com.local_addr, 3021 &ep->com.mapped_local_addr, RDMA_NL_C4IW)) { 3022 iwpm_remove_mapping(&ep->com.local_addr, RDMA_NL_C4IW); 3023 err = -ENOMEM; 3024 goto fail1; 3025 } 3026 print_addr(&ep->com, __func__, "add_query/create_mapinfo"); 3027 set_bit(RELEASE_MAPINFO, &ep->com.flags); 3028 3029 laddr = (struct sockaddr_in *)&ep->com.mapped_local_addr; 3030 raddr = (struct sockaddr_in *)&ep->com.mapped_remote_addr; 3031 laddr6 = (struct sockaddr_in6 *)&ep->com.mapped_local_addr; 3032 raddr6 = (struct sockaddr_in6 *) &ep->com.mapped_remote_addr; 3033 3034 if (cm_id->remote_addr.ss_family == AF_INET) { 3035 iptype = 4; 3036 ra = (__u8 *)&raddr->sin_addr; 3037 3038 /* 3039 * Handle loopback requests to INADDR_ANY. 3040 */ 3041 if ((__force int)raddr->sin_addr.s_addr == INADDR_ANY) { 3042 err = pick_local_ipaddrs(dev, cm_id); 3043 if (err) 3044 goto fail1; 3045 } 3046 3047 /* find a route */ 3048 PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n", 3049 __func__, &laddr->sin_addr, ntohs(laddr->sin_port), 3050 ra, ntohs(raddr->sin_port)); 3051 ep->dst = find_route(dev, laddr->sin_addr.s_addr, 3052 raddr->sin_addr.s_addr, laddr->sin_port, 3053 raddr->sin_port, 0); 3054 } else { 3055 iptype = 6; 3056 ra = (__u8 *)&raddr6->sin6_addr; 3057 3058 /* 3059 * Handle loopback requests to INADDR_ANY. 3060 */ 3061 if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) { 3062 err = pick_local_ip6addrs(dev, cm_id); 3063 if (err) 3064 goto fail1; 3065 } 3066 3067 /* find a route */ 3068 PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n", 3069 __func__, laddr6->sin6_addr.s6_addr, 3070 ntohs(laddr6->sin6_port), 3071 raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port)); 3072 ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr, 3073 raddr6->sin6_addr.s6_addr, 3074 laddr6->sin6_port, raddr6->sin6_port, 0, 3075 raddr6->sin6_scope_id); 3076 } 3077 if (!ep->dst) { 3078 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__); 3079 err = -EHOSTUNREACH; 3080 goto fail2; 3081 } 3082 3083 err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true); 3084 if (err) { 3085 printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__); 3086 goto fail3; 3087 } 3088 3089 PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n", 3090 __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid, 3091 ep->l2t->idx); 3092 3093 state_set(&ep->com, CONNECTING); 3094 ep->tos = 0; 3095 3096 /* send connect request to rnic */ 3097 err = send_connect(ep); 3098 if (!err) 3099 goto out; 3100 3101 cxgb4_l2t_release(ep->l2t); 3102fail3: 3103 dst_release(ep->dst); 3104fail2: 3105 remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid); 3106 cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid); 3107fail1: 3108 cm_id->rem_ref(cm_id); 3109 c4iw_put_ep(&ep->com); 3110out: 3111 return err; 3112} 3113 3114static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep) 3115{ 3116 int err; 3117 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) 3118 &ep->com.mapped_local_addr; 3119 3120 c4iw_init_wr_wait(&ep->com.wr_wait); 3121 err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0], 3122 ep->stid, &sin6->sin6_addr, 3123 sin6->sin6_port, 3124 ep->com.dev->rdev.lldi.rxq_ids[0]); 3125 if (!err) 3126 err = c4iw_wait_for_reply(&ep->com.dev->rdev, 3127 &ep->com.wr_wait, 3128 0, 0, __func__); 3129 if (err) 3130 pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n", 3131 err, ep->stid, 3132 sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port)); 3133 return err; 3134} 3135 3136static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep) 3137{ 3138 int err; 3139 struct sockaddr_in *sin = (struct sockaddr_in *) 3140 &ep->com.mapped_local_addr; 3141 3142 if (dev->rdev.lldi.enable_fw_ofld_conn) { 3143 do { 3144 err = cxgb4_create_server_filter( 3145 ep->com.dev->rdev.lldi.ports[0], ep->stid, 3146 sin->sin_addr.s_addr, sin->sin_port, 0, 3147 ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0); 3148 if (err == -EBUSY) { 3149 set_current_state(TASK_UNINTERRUPTIBLE); 3150 schedule_timeout(usecs_to_jiffies(100)); 3151 } 3152 } while (err == -EBUSY); 3153 } else { 3154 c4iw_init_wr_wait(&ep->com.wr_wait); 3155 err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], 3156 ep->stid, sin->sin_addr.s_addr, sin->sin_port, 3157 0, ep->com.dev->rdev.lldi.rxq_ids[0]); 3158 if (!err) 3159 err = c4iw_wait_for_reply(&ep->com.dev->rdev, 3160 &ep->com.wr_wait, 3161 0, 0, __func__); 3162 } 3163 if (err) 3164 pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n" 3165 , err, ep->stid, 3166 &sin->sin_addr, ntohs(sin->sin_port)); 3167 return err; 3168} 3169 3170int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog) 3171{ 3172 int err = 0; 3173 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device); 3174 struct c4iw_listen_ep *ep; 3175 struct iwpm_dev_data pm_reg_msg; 3176 struct iwpm_sa_data pm_msg; 3177 int iwpm_err = 0; 3178 3179 might_sleep(); 3180 3181 ep = alloc_ep(sizeof(*ep), GFP_KERNEL); 3182 if (!ep) { 3183 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); 3184 err = -ENOMEM; 3185 goto fail1; 3186 } 3187 PDBG("%s ep %p\n", __func__, ep); 3188 cm_id->add_ref(cm_id); 3189 ep->com.cm_id = cm_id; 3190 ep->com.dev = dev; 3191 ep->backlog = backlog; 3192 memcpy(&ep->com.local_addr, &cm_id->local_addr, 3193 sizeof(ep->com.local_addr)); 3194 3195 /* 3196 * Allocate a server TID. 3197 */ 3198 if (dev->rdev.lldi.enable_fw_ofld_conn && 3199 ep->com.local_addr.ss_family == AF_INET) 3200 ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids, 3201 cm_id->local_addr.ss_family, ep); 3202 else 3203 ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, 3204 cm_id->local_addr.ss_family, ep); 3205 3206 if (ep->stid == -1) { 3207 printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__); 3208 err = -ENOMEM; 3209 goto fail2; 3210 } 3211 insert_handle(dev, &dev->stid_idr, ep, ep->stid); 3212 3213 /* No port mapper available, go with the specified info */ 3214 memcpy(&ep->com.mapped_local_addr, &cm_id->local_addr, 3215 sizeof(ep->com.mapped_local_addr)); 3216 3217 c4iw_form_reg_msg(dev, &pm_reg_msg); 3218 iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_C4IW); 3219 if (iwpm_err) { 3220 PDBG("%s: Port Mapper reg pid fail (err = %d).\n", 3221 __func__, iwpm_err); 3222 } 3223 if (iwpm_valid_pid() && !iwpm_err) { 3224 memcpy(&pm_msg.loc_addr, &ep->com.local_addr, 3225 sizeof(ep->com.local_addr)); 3226 iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_C4IW); 3227 if (iwpm_err) 3228 PDBG("%s: Port Mapper query fail (err = %d).\n", 3229 __func__, iwpm_err); 3230 else 3231 memcpy(&ep->com.mapped_local_addr, 3232 &pm_msg.mapped_loc_addr, 3233 sizeof(ep->com.mapped_local_addr)); 3234 } 3235 if (iwpm_create_mapinfo(&ep->com.local_addr, 3236 &ep->com.mapped_local_addr, RDMA_NL_C4IW)) { 3237 err = -ENOMEM; 3238 goto fail3; 3239 } 3240 print_addr(&ep->com, __func__, "add_mapping/create_mapinfo"); 3241 3242 set_bit(RELEASE_MAPINFO, &ep->com.flags); 3243 state_set(&ep->com, LISTEN); 3244 if (ep->com.local_addr.ss_family == AF_INET) 3245 err = create_server4(dev, ep); 3246 else 3247 err = create_server6(dev, ep); 3248 if (!err) { 3249 cm_id->provider_data = ep; 3250 goto out; 3251 } 3252 3253fail3: 3254 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, 3255 ep->com.local_addr.ss_family); 3256fail2: 3257 cm_id->rem_ref(cm_id); 3258 c4iw_put_ep(&ep->com); 3259fail1: 3260out: 3261 return err; 3262} 3263 3264int c4iw_destroy_listen(struct iw_cm_id *cm_id) 3265{ 3266 int err; 3267 struct c4iw_listen_ep *ep = to_listen_ep(cm_id); 3268 3269 PDBG("%s ep %p\n", __func__, ep); 3270 3271 might_sleep(); 3272 state_set(&ep->com, DEAD); 3273 if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn && 3274 ep->com.local_addr.ss_family == AF_INET) { 3275 err = cxgb4_remove_server_filter( 3276 ep->com.dev->rdev.lldi.ports[0], ep->stid, 3277 ep->com.dev->rdev.lldi.rxq_ids[0], 0); 3278 } else { 3279 c4iw_init_wr_wait(&ep->com.wr_wait); 3280 err = cxgb4_remove_server( 3281 ep->com.dev->rdev.lldi.ports[0], ep->stid, 3282 ep->com.dev->rdev.lldi.rxq_ids[0], 0); 3283 if (err) 3284 goto done; 3285 err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 3286 0, 0, __func__); 3287 } 3288 remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid); 3289 cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, 3290 ep->com.local_addr.ss_family); 3291done: 3292 cm_id->rem_ref(cm_id); 3293 c4iw_put_ep(&ep->com); 3294 return err; 3295} 3296 3297int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp) 3298{ 3299 int ret = 0; 3300 int close = 0; 3301 int fatal = 0; 3302 struct c4iw_rdev *rdev; 3303 3304 mutex_lock(&ep->com.mutex); 3305 3306 PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep, 3307 states[ep->com.state], abrupt); 3308 3309 rdev = &ep->com.dev->rdev; 3310 if (c4iw_fatal_error(rdev)) { 3311 fatal = 1; 3312 close_complete_upcall(ep, -EIO); 3313 ep->com.state = DEAD; 3314 } 3315 switch (ep->com.state) { 3316 case MPA_REQ_WAIT: 3317 case MPA_REQ_SENT: 3318 case MPA_REQ_RCVD: 3319 case MPA_REP_SENT: 3320 case FPDU_MODE: 3321 close = 1; 3322 if (abrupt) 3323 ep->com.state = ABORTING; 3324 else { 3325 ep->com.state = CLOSING; 3326 start_ep_timer(ep); 3327 } 3328 set_bit(CLOSE_SENT, &ep->com.flags); 3329 break; 3330 case CLOSING: 3331 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) { 3332 close = 1; 3333 if (abrupt) { 3334 (void)stop_ep_timer(ep); 3335 ep->com.state = ABORTING; 3336 } else 3337 ep->com.state = MORIBUND; 3338 } 3339 break; 3340 case MORIBUND: 3341 case ABORTING: 3342 case DEAD: 3343 PDBG("%s ignoring disconnect ep %p state %u\n", 3344 __func__, ep, ep->com.state); 3345 break; 3346 default: 3347 BUG(); 3348 break; 3349 } 3350 3351 if (close) { 3352 if (abrupt) { 3353 set_bit(EP_DISC_ABORT, &ep->com.history); 3354 close_complete_upcall(ep, -ECONNRESET); 3355 ret = send_abort(ep, NULL, gfp); 3356 } else { 3357 set_bit(EP_DISC_CLOSE, &ep->com.history); 3358 ret = send_halfclose(ep, gfp); 3359 } 3360 if (ret) 3361 fatal = 1; 3362 } 3363 mutex_unlock(&ep->com.mutex); 3364 if (fatal) 3365 release_ep_resources(ep); 3366 return ret; 3367} 3368 3369static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb, 3370 struct cpl_fw6_msg_ofld_connection_wr_rpl *req) 3371{ 3372 struct c4iw_ep *ep; 3373 int atid = be32_to_cpu(req->tid); 3374 3375 ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids, 3376 (__force u32) req->tid); 3377 if (!ep) 3378 return; 3379 3380 switch (req->retval) { 3381 case FW_ENOMEM: 3382 set_bit(ACT_RETRY_NOMEM, &ep->com.history); 3383 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) { 3384 send_fw_act_open_req(ep, atid); 3385 return; 3386 } 3387 case FW_EADDRINUSE: 3388 set_bit(ACT_RETRY_INUSE, &ep->com.history); 3389 if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) { 3390 send_fw_act_open_req(ep, atid); 3391 return; 3392 } 3393 break; 3394 default: 3395 pr_info("%s unexpected ofld conn wr retval %d\n", 3396 __func__, req->retval); 3397 break; 3398 } 3399 pr_err("active ofld_connect_wr failure %d atid %d\n", 3400 req->retval, atid); 3401 mutex_lock(&dev->rdev.stats.lock); 3402 dev->rdev.stats.act_ofld_conn_fails++; 3403 mutex_unlock(&dev->rdev.stats.lock); 3404 connect_reply_upcall(ep, status2errno(req->retval)); 3405 state_set(&ep->com, DEAD); 3406 remove_handle(dev, &dev->atid_idr, atid); 3407 cxgb4_free_atid(dev->rdev.lldi.tids, atid); 3408 dst_release(ep->dst); 3409 cxgb4_l2t_release(ep->l2t); 3410 c4iw_put_ep(&ep->com); 3411} 3412 3413static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb, 3414 struct cpl_fw6_msg_ofld_connection_wr_rpl *req) 3415{ 3416 struct sk_buff *rpl_skb; 3417 struct cpl_pass_accept_req *cpl; 3418 int ret; 3419 3420 rpl_skb = (struct sk_buff *)(unsigned long)req->cookie; 3421 BUG_ON(!rpl_skb); 3422 if (req->retval) { 3423 PDBG("%s passive open failure %d\n", __func__, req->retval); 3424 mutex_lock(&dev->rdev.stats.lock); 3425 dev->rdev.stats.pas_ofld_conn_fails++; 3426 mutex_unlock(&dev->rdev.stats.lock); 3427 kfree_skb(rpl_skb); 3428 } else { 3429 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb); 3430 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 3431 (__force u32) htonl( 3432 (__force u32) req->tid))); 3433 ret = pass_accept_req(dev, rpl_skb); 3434 if (!ret) 3435 kfree_skb(rpl_skb); 3436 } 3437 return; 3438} 3439 3440static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb) 3441{ 3442 struct cpl_fw6_msg *rpl = cplhdr(skb); 3443 struct cpl_fw6_msg_ofld_connection_wr_rpl *req; 3444 3445 switch (rpl->type) { 3446 case FW6_TYPE_CQE: 3447 c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]); 3448 break; 3449 case FW6_TYPE_OFLD_CONNECTION_WR_RPL: 3450 req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data; 3451 switch (req->t_state) { 3452 case TCP_SYN_SENT: 3453 active_ofld_conn_reply(dev, skb, req); 3454 break; 3455 case TCP_SYN_RECV: 3456 passive_ofld_conn_reply(dev, skb, req); 3457 break; 3458 default: 3459 pr_err("%s unexpected ofld conn wr state %d\n", 3460 __func__, req->t_state); 3461 break; 3462 } 3463 break; 3464 } 3465 return 0; 3466} 3467 3468static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos) 3469{ 3470 u32 l2info; 3471 u16 vlantag, len, hdr_len, eth_hdr_len; 3472 u8 intf; 3473 struct cpl_rx_pkt *cpl = cplhdr(skb); 3474 struct cpl_pass_accept_req *req; 3475 struct tcp_options_received tmp_opt; 3476 struct c4iw_dev *dev; 3477 3478 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *))); 3479 /* Store values from cpl_rx_pkt in temporary location. */ 3480 vlantag = (__force u16) cpl->vlan; 3481 len = (__force u16) cpl->len; 3482 l2info = (__force u32) cpl->l2info; 3483 hdr_len = (__force u16) cpl->hdr_len; 3484 intf = cpl->iff; 3485 3486 __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header)); 3487 3488 /* 3489 * We need to parse the TCP options from SYN packet. 3490 * to generate cpl_pass_accept_req. 3491 */ 3492 memset(&tmp_opt, 0, sizeof(tmp_opt)); 3493 tcp_clear_options(&tmp_opt); 3494 tcp_parse_options(skb, &tmp_opt, 0, NULL); 3495 3496 req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req)); 3497 memset(req, 0, sizeof(*req)); 3498 req->l2info = cpu_to_be16(V_SYN_INTF(intf) | 3499 V_SYN_MAC_IDX(G_RX_MACIDX( 3500 (__force int) htonl(l2info))) | 3501 F_SYN_XACT_MATCH); 3502 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ? 3503 G_RX_ETHHDR_LEN((__force int) htonl(l2info)) : 3504 G_RX_T5_ETHHDR_LEN((__force int) htonl(l2info)); 3505 req->hdr_len = cpu_to_be32(V_SYN_RX_CHAN(G_RX_CHAN( 3506 (__force int) htonl(l2info))) | 3507 V_TCP_HDR_LEN(G_RX_TCPHDR_LEN( 3508 (__force int) htons(hdr_len))) | 3509 V_IP_HDR_LEN(G_RX_IPHDR_LEN( 3510 (__force int) htons(hdr_len))) | 3511 V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(eth_hdr_len))); 3512 req->vlan = (__force __be16) vlantag; 3513 req->len = (__force __be16) len; 3514 req->tos_stid = cpu_to_be32(PASS_OPEN_TID(stid) | 3515 PASS_OPEN_TOS(tos)); 3516 req->tcpopt.mss = htons(tmp_opt.mss_clamp); 3517 if (tmp_opt.wscale_ok) 3518 req->tcpopt.wsf = tmp_opt.snd_wscale; 3519 req->tcpopt.tstamp = tmp_opt.saw_tstamp; 3520 if (tmp_opt.sack_ok) 3521 req->tcpopt.sack = 1; 3522 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0)); 3523 return; 3524} 3525 3526static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb, 3527 __be32 laddr, __be16 lport, 3528 __be32 raddr, __be16 rport, 3529 u32 rcv_isn, u32 filter, u16 window, 3530 u32 rss_qid, u8 port_id) 3531{ 3532 struct sk_buff *req_skb; 3533 struct fw_ofld_connection_wr *req; 3534 struct cpl_pass_accept_req *cpl = cplhdr(skb); 3535 int ret; 3536 3537 req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL); 3538 req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req)); 3539 memset(req, 0, sizeof(*req)); 3540 req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL(1)); 3541 req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16))); 3542 req->le.version_cpl = htonl(F_FW_OFLD_CONNECTION_WR_CPL); 3543 req->le.filter = (__force __be32) filter; 3544 req->le.lport = lport; 3545 req->le.pport = rport; 3546 req->le.u.ipv4.lip = laddr; 3547 req->le.u.ipv4.pip = raddr; 3548 req->tcb.rcv_nxt = htonl(rcv_isn + 1); 3549 req->tcb.rcv_adv = htons(window); 3550 req->tcb.t_state_to_astid = 3551 htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_RECV) | 3552 V_FW_OFLD_CONNECTION_WR_RCV_SCALE(cpl->tcpopt.wsf) | 3553 V_FW_OFLD_CONNECTION_WR_ASTID( 3554 GET_PASS_OPEN_TID(ntohl(cpl->tos_stid)))); 3555 3556 /* 3557 * We store the qid in opt2 which will be used by the firmware 3558 * to send us the wr response. 3559 */ 3560 req->tcb.opt2 = htonl(V_RSS_QUEUE(rss_qid)); 3561 3562 /* 3563 * We initialize the MSS index in TCB to 0xF. 3564 * So that when driver sends cpl_pass_accept_rpl 3565 * TCB picks up the correct value. If this was 0 3566 * TP will ignore any value > 0 for MSS index. 3567 */ 3568 req->tcb.opt0 = cpu_to_be64(V_MSS_IDX(0xF)); 3569 req->cookie = (unsigned long)skb; 3570 3571 set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id); 3572 ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb); 3573 if (ret < 0) { 3574 pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__, 3575 ret); 3576 kfree_skb(skb); 3577 kfree_skb(req_skb); 3578 } 3579} 3580 3581/* 3582 * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt 3583 * messages when a filter is being used instead of server to 3584 * redirect a syn packet. When packets hit filter they are redirected 3585 * to the offload queue and driver tries to establish the connection 3586 * using firmware work request. 3587 */ 3588static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb) 3589{ 3590 int stid; 3591 unsigned int filter; 3592 struct ethhdr *eh = NULL; 3593 struct vlan_ethhdr *vlan_eh = NULL; 3594 struct iphdr *iph; 3595 struct tcphdr *tcph; 3596 struct rss_header *rss = (void *)skb->data; 3597 struct cpl_rx_pkt *cpl = (void *)skb->data; 3598 struct cpl_pass_accept_req *req = (void *)(rss + 1); 3599 struct l2t_entry *e; 3600 struct dst_entry *dst; 3601 struct c4iw_ep *lep; 3602 u16 window; 3603 struct port_info *pi; 3604 struct net_device *pdev; 3605 u16 rss_qid, eth_hdr_len; 3606 int step; 3607 u32 tx_chan; 3608 struct neighbour *neigh; 3609 3610 /* Drop all non-SYN packets */ 3611 if (!(cpl->l2info & cpu_to_be32(F_RXF_SYN))) 3612 goto reject; 3613 3614 /* 3615 * Drop all packets which did not hit the filter. 3616 * Unlikely to happen. 3617 */ 3618 if (!(rss->filter_hit && rss->filter_tid)) 3619 goto reject; 3620 3621 /* 3622 * Calculate the server tid from filter hit index from cpl_rx_pkt. 3623 */ 3624 stid = (__force int) cpu_to_be32((__force u32) rss->hash_val); 3625 3626 lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid); 3627 if (!lep) { 3628 PDBG("%s connect request on invalid stid %d\n", __func__, stid); 3629 goto reject; 3630 } 3631 3632 eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ? 3633 G_RX_ETHHDR_LEN(htonl(cpl->l2info)) : 3634 G_RX_T5_ETHHDR_LEN(htonl(cpl->l2info)); 3635 if (eth_hdr_len == ETH_HLEN) { 3636 eh = (struct ethhdr *)(req + 1); 3637 iph = (struct iphdr *)(eh + 1); 3638 } else { 3639 vlan_eh = (struct vlan_ethhdr *)(req + 1); 3640 iph = (struct iphdr *)(vlan_eh + 1); 3641 skb->vlan_tci = ntohs(cpl->vlan); 3642 } 3643 3644 if (iph->version != 0x4) 3645 goto reject; 3646 3647 tcph = (struct tcphdr *)(iph + 1); 3648 skb_set_network_header(skb, (void *)iph - (void *)rss); 3649 skb_set_transport_header(skb, (void *)tcph - (void *)rss); 3650 skb_get(skb); 3651 3652 PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__, 3653 ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr), 3654 ntohs(tcph->source), iph->tos); 3655 3656 dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source, 3657 iph->tos); 3658 if (!dst) { 3659 pr_err("%s - failed to find dst entry!\n", 3660 __func__); 3661 goto reject; 3662 } 3663 neigh = dst_neigh_lookup_skb(dst, skb); 3664 3665 if (!neigh) { 3666 pr_err("%s - failed to allocate neigh!\n", 3667 __func__); 3668 goto free_dst; 3669 } 3670 3671 if (neigh->dev->flags & IFF_LOOPBACK) { 3672 pdev = ip_dev_find(&init_net, iph->daddr); 3673 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh, 3674 pdev, 0); 3675 pi = (struct port_info *)netdev_priv(pdev); 3676 tx_chan = cxgb4_port_chan(pdev); 3677 dev_put(pdev); 3678 } else { 3679 pdev = get_real_dev(neigh->dev); 3680 e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh, 3681 pdev, 0); 3682 pi = (struct port_info *)netdev_priv(pdev); 3683 tx_chan = cxgb4_port_chan(pdev); 3684 } 3685 neigh_release(neigh); 3686 if (!e) { 3687 pr_err("%s - failed to allocate l2t entry!\n", 3688 __func__); 3689 goto free_dst; 3690 } 3691 3692 step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan; 3693 rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step]; 3694 window = (__force u16) htons((__force u16)tcph->window); 3695 3696 /* Calcuate filter portion for LE region. */ 3697 filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple( 3698 dev->rdev.lldi.ports[0], 3699 e)); 3700 3701 /* 3702 * Synthesize the cpl_pass_accept_req. We have everything except the 3703 * TID. Once firmware sends a reply with TID we update the TID field 3704 * in cpl and pass it through the regular cpl_pass_accept_req path. 3705 */ 3706 build_cpl_pass_accept_req(skb, stid, iph->tos); 3707 send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr, 3708 tcph->source, ntohl(tcph->seq), filter, window, 3709 rss_qid, pi->port_id); 3710 cxgb4_l2t_release(e); 3711free_dst: 3712 dst_release(dst); 3713reject: 3714 return 0; 3715} 3716 3717/* 3718 * These are the real handlers that are called from a 3719 * work queue. 3720 */ 3721static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = { 3722 [CPL_ACT_ESTABLISH] = act_establish, 3723 [CPL_ACT_OPEN_RPL] = act_open_rpl, 3724 [CPL_RX_DATA] = rx_data, 3725 [CPL_ABORT_RPL_RSS] = abort_rpl, 3726 [CPL_ABORT_RPL] = abort_rpl, 3727 [CPL_PASS_OPEN_RPL] = pass_open_rpl, 3728 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl, 3729 [CPL_PASS_ACCEPT_REQ] = pass_accept_req, 3730 [CPL_PASS_ESTABLISH] = pass_establish, 3731 [CPL_PEER_CLOSE] = peer_close, 3732 [CPL_ABORT_REQ_RSS] = peer_abort, 3733 [CPL_CLOSE_CON_RPL] = close_con_rpl, 3734 [CPL_RDMA_TERMINATE] = terminate, 3735 [CPL_FW4_ACK] = fw4_ack, 3736 [CPL_FW6_MSG] = deferred_fw6_msg, 3737 [CPL_RX_PKT] = rx_pkt 3738}; 3739 3740static void process_timeout(struct c4iw_ep *ep) 3741{ 3742 struct c4iw_qp_attributes attrs; 3743 int abort = 1; 3744 3745 mutex_lock(&ep->com.mutex); 3746 PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid, 3747 ep->com.state); 3748 set_bit(TIMEDOUT, &ep->com.history); 3749 switch (ep->com.state) { 3750 case MPA_REQ_SENT: 3751 __state_set(&ep->com, ABORTING); 3752 connect_reply_upcall(ep, -ETIMEDOUT); 3753 break; 3754 case MPA_REQ_WAIT: 3755 __state_set(&ep->com, ABORTING); 3756 break; 3757 case CLOSING: 3758 case MORIBUND: 3759 if (ep->com.cm_id && ep->com.qp) { 3760 attrs.next_state = C4IW_QP_STATE_ERROR; 3761 c4iw_modify_qp(ep->com.qp->rhp, 3762 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, 3763 &attrs, 1); 3764 } 3765 __state_set(&ep->com, ABORTING); 3766 close_complete_upcall(ep, -ETIMEDOUT); 3767 break; 3768 case ABORTING: 3769 case DEAD: 3770 3771 /* 3772 * These states are expected if the ep timed out at the same 3773 * time as another thread was calling stop_ep_timer(). 3774 * So we silently do nothing for these states. 3775 */ 3776 abort = 0; 3777 break; 3778 default: 3779 WARN(1, "%s unexpected state ep %p tid %u state %u\n", 3780 __func__, ep, ep->hwtid, ep->com.state); 3781 abort = 0; 3782 } 3783 if (abort) 3784 abort_connection(ep, NULL, GFP_KERNEL); 3785 mutex_unlock(&ep->com.mutex); 3786 c4iw_put_ep(&ep->com); 3787} 3788 3789static void process_timedout_eps(void) 3790{ 3791 struct c4iw_ep *ep; 3792 3793 spin_lock_irq(&timeout_lock); 3794 while (!list_empty(&timeout_list)) { 3795 struct list_head *tmp; 3796 3797 tmp = timeout_list.next; 3798 list_del(tmp); 3799 tmp->next = NULL; 3800 tmp->prev = NULL; 3801 spin_unlock_irq(&timeout_lock); 3802 ep = list_entry(tmp, struct c4iw_ep, entry); 3803 process_timeout(ep); 3804 spin_lock_irq(&timeout_lock); 3805 } 3806 spin_unlock_irq(&timeout_lock); 3807} 3808 3809static void process_work(struct work_struct *work) 3810{ 3811 struct sk_buff *skb = NULL; 3812 struct c4iw_dev *dev; 3813 struct cpl_act_establish *rpl; 3814 unsigned int opcode; 3815 int ret; 3816 3817 process_timedout_eps(); 3818 while ((skb = skb_dequeue(&rxq))) { 3819 rpl = cplhdr(skb); 3820 dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *))); 3821 opcode = rpl->ot.opcode; 3822 3823 BUG_ON(!work_handlers[opcode]); 3824 ret = work_handlers[opcode](dev, skb); 3825 if (!ret) 3826 kfree_skb(skb); 3827 process_timedout_eps(); 3828 } 3829} 3830 3831static DECLARE_WORK(skb_work, process_work); 3832 3833static void ep_timeout(unsigned long arg) 3834{ 3835 struct c4iw_ep *ep = (struct c4iw_ep *)arg; 3836 int kickit = 0; 3837 3838 spin_lock(&timeout_lock); 3839 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) { 3840 /* 3841 * Only insert if it is not already on the list. 3842 */ 3843 if (!ep->entry.next) { 3844 list_add_tail(&ep->entry, &timeout_list); 3845 kickit = 1; 3846 } 3847 } 3848 spin_unlock(&timeout_lock); 3849 if (kickit) 3850 queue_work(workq, &skb_work); 3851} 3852 3853/* 3854 * All the CM events are handled on a work queue to have a safe context. 3855 */ 3856static int sched(struct c4iw_dev *dev, struct sk_buff *skb) 3857{ 3858 3859 /* 3860 * Save dev in the skb->cb area. 3861 */ 3862 *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev; 3863 3864 /* 3865 * Queue the skb and schedule the worker thread. 3866 */ 3867 skb_queue_tail(&rxq, skb); 3868 queue_work(workq, &skb_work); 3869 return 0; 3870} 3871 3872static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 3873{ 3874 struct cpl_set_tcb_rpl *rpl = cplhdr(skb); 3875 3876 if (rpl->status != CPL_ERR_NONE) { 3877 printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u " 3878 "for tid %u\n", rpl->status, GET_TID(rpl)); 3879 } 3880 kfree_skb(skb); 3881 return 0; 3882} 3883 3884static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb) 3885{ 3886 struct cpl_fw6_msg *rpl = cplhdr(skb); 3887 struct c4iw_wr_wait *wr_waitp; 3888 int ret; 3889 3890 PDBG("%s type %u\n", __func__, rpl->type); 3891 3892 switch (rpl->type) { 3893 case FW6_TYPE_WR_RPL: 3894 ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff); 3895 wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1]; 3896 PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret); 3897 if (wr_waitp) 3898 c4iw_wake_up(wr_waitp, ret ? -ret : 0); 3899 kfree_skb(skb); 3900 break; 3901 case FW6_TYPE_CQE: 3902 case FW6_TYPE_OFLD_CONNECTION_WR_RPL: 3903 sched(dev, skb); 3904 break; 3905 default: 3906 printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__, 3907 rpl->type); 3908 kfree_skb(skb); 3909 break; 3910 } 3911 return 0; 3912} 3913 3914static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb) 3915{ 3916 struct cpl_abort_req_rss *req = cplhdr(skb); 3917 struct c4iw_ep *ep; 3918 struct tid_info *t = dev->rdev.lldi.tids; 3919 unsigned int tid = GET_TID(req); 3920 3921 ep = lookup_tid(t, tid); 3922 if (!ep) { 3923 printk(KERN_WARNING MOD 3924 "Abort on non-existent endpoint, tid %d\n", tid); 3925 kfree_skb(skb); 3926 return 0; 3927 } 3928 if (is_neg_adv(req->status)) { 3929 dev_warn(&dev->rdev.lldi.pdev->dev, 3930 "Negative advice on abort - tid %u status %d (%s)\n", 3931 ep->hwtid, req->status, neg_adv_str(req->status)); 3932 kfree_skb(skb); 3933 return 0; 3934 } 3935 PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid, 3936 ep->com.state); 3937 3938 /* 3939 * Wake up any threads in rdma_init() or rdma_fini(). 3940 * However, if we are on MPAv2 and want to retry with MPAv1 3941 * then, don't wake up yet. 3942 */ 3943 if (mpa_rev == 2 && !ep->tried_with_mpa_v1) { 3944 if (ep->com.state != MPA_REQ_SENT) 3945 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); 3946 } else 3947 c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); 3948 sched(dev, skb); 3949 return 0; 3950} 3951 3952/* 3953 * Most upcalls from the T4 Core go to sched() to 3954 * schedule the processing on a work queue. 3955 */ 3956c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = { 3957 [CPL_ACT_ESTABLISH] = sched, 3958 [CPL_ACT_OPEN_RPL] = sched, 3959 [CPL_RX_DATA] = sched, 3960 [CPL_ABORT_RPL_RSS] = sched, 3961 [CPL_ABORT_RPL] = sched, 3962 [CPL_PASS_OPEN_RPL] = sched, 3963 [CPL_CLOSE_LISTSRV_RPL] = sched, 3964 [CPL_PASS_ACCEPT_REQ] = sched, 3965 [CPL_PASS_ESTABLISH] = sched, 3966 [CPL_PEER_CLOSE] = sched, 3967 [CPL_CLOSE_CON_RPL] = sched, 3968 [CPL_ABORT_REQ_RSS] = peer_abort_intr, 3969 [CPL_RDMA_TERMINATE] = sched, 3970 [CPL_FW4_ACK] = sched, 3971 [CPL_SET_TCB_RPL] = set_tcb_rpl, 3972 [CPL_FW6_MSG] = fw6_msg, 3973 [CPL_RX_PKT] = sched 3974}; 3975 3976int __init c4iw_cm_init(void) 3977{ 3978 spin_lock_init(&timeout_lock); 3979 skb_queue_head_init(&rxq); 3980 3981 workq = create_singlethread_workqueue("iw_cxgb4"); 3982 if (!workq) 3983 return -ENOMEM; 3984 3985 return 0; 3986} 3987 3988void c4iw_cm_term(void) 3989{ 3990 WARN_ON(!list_empty(&timeout_list)); 3991 flush_workqueue(workq); 3992 destroy_workqueue(workq); 3993} 3994