1/*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2006 Mellanox Technologies. All rights reserved 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35#include <sys/cdefs.h> 36__FBSDID("$FreeBSD$"); 37 38#include "ipoib.h" 39 40#ifdef CONFIG_INFINIBAND_IPOIB_CM 41 42#include <netinet/ip.h> 43#include <netinet/ip_icmp.h> 44#include <netinet/icmp6.h> 45 46#include <rdma/ib_cm.h> 47#include <rdma/ib_cache.h> 48#include <linux/delay.h> 49 50int ipoib_max_conn_qp = 128; 51 52module_param_named(max_nonsrq_conn_qp, ipoib_max_conn_qp, int, 0444); 53MODULE_PARM_DESC(max_nonsrq_conn_qp, 54 "Max number of connected-mode QPs per interface " 55 "(applied only if shared receive queue is not available)"); 56 57#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA 58static int data_debug_level; 59 60module_param_named(cm_data_debug_level, data_debug_level, int, 0644); 61MODULE_PARM_DESC(cm_data_debug_level, 62 "Enable data path debug tracing for connected mode if > 0"); 63#endif 64 65#define IPOIB_CM_IETF_ID 0x1000000000000000ULL 66 67#define IPOIB_CM_RX_UPDATE_TIME (256 * HZ) 68#define IPOIB_CM_RX_TIMEOUT (2 * 256 * HZ) 69#define IPOIB_CM_RX_DELAY (3 * 256 * HZ) 70#define IPOIB_CM_RX_UPDATE_MASK (0x3) 71 72static struct ib_qp_attr ipoib_cm_err_attr = { 73 .qp_state = IB_QPS_ERR 74}; 75 76#define IPOIB_CM_RX_DRAIN_WRID 0xffffffff 77 78static struct ib_send_wr ipoib_cm_rx_drain_wr = { 79 .wr_id = IPOIB_CM_RX_DRAIN_WRID, 80 .opcode = IB_WR_SEND, 81}; 82 83static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, 84 struct ib_cm_event *event); 85 86static void ipoib_cm_dma_unmap_rx(struct ipoib_dev_priv *priv, struct ipoib_cm_rx_buf *rx_req) 87{ 88 89 ipoib_dma_unmap_rx(priv, (struct ipoib_rx_buf *)rx_req); 90 91} 92 93static int ipoib_cm_post_receive_srq(struct ipoib_dev_priv *priv, int id) 94{ 95 struct ib_recv_wr *bad_wr; 96 struct ipoib_rx_buf *rx_req; 97 struct mbuf *m; 98 int ret; 99 int i; 100 101 rx_req = (struct ipoib_rx_buf *)&priv->cm.srq_ring[id]; 102 for (m = rx_req->mb, i = 0; m != NULL; m = m->m_next, i++) { 103 priv->cm.rx_sge[i].addr = rx_req->mapping[i]; 104 priv->cm.rx_sge[i].length = m->m_len; 105 } 106 107 priv->cm.rx_wr.num_sge = i; 108 priv->cm.rx_wr.wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV; 109 110 ret = ib_post_srq_recv(priv->cm.srq, &priv->cm.rx_wr, &bad_wr); 111 if (unlikely(ret)) { 112 ipoib_warn(priv, "post srq failed for buf %d (%d)\n", id, ret); 113 ipoib_dma_unmap_rx(priv, rx_req); 114 m_freem(priv->cm.srq_ring[id].mb); 115 priv->cm.srq_ring[id].mb = NULL; 116 } 117 118 return ret; 119} 120 121static int ipoib_cm_post_receive_nonsrq(struct ipoib_dev_priv *priv, 122 struct ipoib_cm_rx *rx, 123 struct ib_recv_wr *wr, 124 struct ib_sge *sge, int id) 125{ 126 struct ipoib_rx_buf *rx_req; 127 struct ib_recv_wr *bad_wr; 128 struct mbuf *m; 129 int ret; 130 int i; 131 132 rx_req = (struct ipoib_rx_buf *)&rx->rx_ring[id]; 133 for (m = rx_req->mb, i = 0; m != NULL; m = m->m_next, i++) { 134 sge[i].addr = rx_req->mapping[i]; 135 sge[i].length = m->m_len; 136 } 137 138 wr->num_sge = i; 139 wr->wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV; 140 141 ret = ib_post_recv(rx->qp, wr, &bad_wr); 142 if (unlikely(ret)) { 143 ipoib_warn(priv, "post recv failed for buf %d (%d)\n", id, ret); 144 ipoib_dma_unmap_rx(priv, rx_req); 145 m_freem(rx->rx_ring[id].mb); 146 rx->rx_ring[id].mb = NULL; 147 } 148 149 return ret; 150} 151 152static struct mbuf * 153ipoib_cm_alloc_rx_mb(struct ipoib_dev_priv *priv, struct ipoib_cm_rx_buf *rx_req) 154{ 155 return ipoib_alloc_map_mb(priv, (struct ipoib_rx_buf *)rx_req, 156 sizeof(struct ipoib_pseudoheader), priv->cm.max_cm_mtu, IPOIB_CM_RX_SG); 157} 158 159static void ipoib_cm_free_rx_ring(struct ipoib_dev_priv *priv, 160 struct ipoib_cm_rx_buf *rx_ring) 161{ 162 int i; 163 164 for (i = 0; i < ipoib_recvq_size; ++i) 165 if (rx_ring[i].mb) { 166 ipoib_cm_dma_unmap_rx(priv, &rx_ring[i]); 167 m_freem(rx_ring[i].mb); 168 } 169 170 kfree(rx_ring); 171} 172 173static void ipoib_cm_start_rx_drain(struct ipoib_dev_priv *priv) 174{ 175 struct ib_send_wr *bad_wr; 176 struct ipoib_cm_rx *p; 177 178 /* We only reserved 1 extra slot in CQ for drain WRs, so 179 * make sure we have at most 1 outstanding WR. */ 180 if (list_empty(&priv->cm.rx_flush_list) || 181 !list_empty(&priv->cm.rx_drain_list)) 182 return; 183 184 /* 185 * QPs on flush list are error state. This way, a "flush 186 * error" WC will be immediately generated for each WR we post. 187 */ 188 p = list_entry(priv->cm.rx_flush_list.next, typeof(*p), list); 189 if (ib_post_send(p->qp, &ipoib_cm_rx_drain_wr, &bad_wr)) 190 ipoib_warn(priv, "failed to post drain wr\n"); 191 192 list_splice_init(&priv->cm.rx_flush_list, &priv->cm.rx_drain_list); 193} 194 195static void ipoib_cm_rx_event_handler(struct ib_event *event, void *ctx) 196{ 197 struct ipoib_cm_rx *p = ctx; 198 struct ipoib_dev_priv *priv = p->priv; 199 unsigned long flags; 200 201 if (event->event != IB_EVENT_QP_LAST_WQE_REACHED) 202 return; 203 204 spin_lock_irqsave(&priv->lock, flags); 205 list_move(&p->list, &priv->cm.rx_flush_list); 206 p->state = IPOIB_CM_RX_FLUSH; 207 ipoib_cm_start_rx_drain(priv); 208 spin_unlock_irqrestore(&priv->lock, flags); 209} 210 211static struct ib_qp *ipoib_cm_create_rx_qp(struct ipoib_dev_priv *priv, 212 struct ipoib_cm_rx *p) 213{ 214 struct ib_qp_init_attr attr = { 215 .event_handler = ipoib_cm_rx_event_handler, 216 .send_cq = priv->recv_cq, /* For drain WR */ 217 .recv_cq = priv->recv_cq, 218 .srq = priv->cm.srq, 219 .cap.max_send_wr = 1, /* For drain WR */ 220 .cap.max_send_sge = 1, 221 .sq_sig_type = IB_SIGNAL_ALL_WR, 222 .qp_type = IB_QPT_RC, 223 .qp_context = p, 224 }; 225 226 if (!ipoib_cm_has_srq(priv)) { 227 attr.cap.max_recv_wr = ipoib_recvq_size; 228 attr.cap.max_recv_sge = priv->cm.num_frags; 229 } 230 231 return ib_create_qp(priv->pd, &attr); 232} 233 234static int ipoib_cm_modify_rx_qp(struct ipoib_dev_priv *priv, 235 struct ib_cm_id *cm_id, struct ib_qp *qp, 236 unsigned psn) 237{ 238 struct ib_qp_attr qp_attr; 239 int qp_attr_mask, ret; 240 241 qp_attr.qp_state = IB_QPS_INIT; 242 ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); 243 if (ret) { 244 ipoib_warn(priv, "failed to init QP attr for INIT: %d\n", ret); 245 return ret; 246 } 247 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 248 if (ret) { 249 ipoib_warn(priv, "failed to modify QP to INIT: %d\n", ret); 250 return ret; 251 } 252 qp_attr.qp_state = IB_QPS_RTR; 253 ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); 254 if (ret) { 255 ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); 256 return ret; 257 } 258 qp_attr.rq_psn = psn; 259 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 260 if (ret) { 261 ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); 262 return ret; 263 } 264 265 /* 266 * Current Mellanox HCA firmware won't generate completions 267 * with error for drain WRs unless the QP has been moved to 268 * RTS first. This work-around leaves a window where a QP has 269 * moved to error asynchronously, but this will eventually get 270 * fixed in firmware, so let's not error out if modify QP 271 * fails. 272 */ 273 qp_attr.qp_state = IB_QPS_RTS; 274 ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); 275 if (ret) { 276 ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); 277 return 0; 278 } 279 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 280 if (ret) { 281 ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); 282 return 0; 283 } 284 285 return 0; 286} 287 288static void ipoib_cm_init_rx_wr(struct ipoib_dev_priv *priv, 289 struct ib_recv_wr *wr, 290 struct ib_sge *sge) 291{ 292 int i; 293 294 for (i = 0; i < IPOIB_CM_RX_SG; i++) 295 sge[i].lkey = priv->pd->local_dma_lkey; 296 297 wr->next = NULL; 298 wr->sg_list = sge; 299 wr->num_sge = 1; 300} 301 302static int ipoib_cm_nonsrq_init_rx(struct ipoib_dev_priv *priv, 303 struct ib_cm_id *cm_id, struct ipoib_cm_rx *rx) 304{ 305 struct { 306 struct ib_recv_wr wr; 307 struct ib_sge sge[IPOIB_CM_RX_SG]; 308 } *t; 309 int ret; 310 int i; 311 312 rx->rx_ring = kzalloc(ipoib_recvq_size * sizeof *rx->rx_ring, GFP_KERNEL); 313 if (!rx->rx_ring) { 314 printk(KERN_WARNING "%s: failed to allocate CM non-SRQ ring (%d entries)\n", 315 priv->ca->name, ipoib_recvq_size); 316 return -ENOMEM; 317 } 318 319 memset(rx->rx_ring, 0, ipoib_recvq_size * sizeof *rx->rx_ring); 320 321 t = kmalloc(sizeof *t, GFP_KERNEL); 322 if (!t) { 323 ret = -ENOMEM; 324 goto err_free; 325 } 326 327 ipoib_cm_init_rx_wr(priv, &t->wr, t->sge); 328 329 spin_lock_irq(&priv->lock); 330 331 if (priv->cm.nonsrq_conn_qp >= ipoib_max_conn_qp) { 332 spin_unlock_irq(&priv->lock); 333 ib_send_cm_rej(cm_id, IB_CM_REJ_NO_QP, NULL, 0, NULL, 0); 334 ret = -EINVAL; 335 goto err_free; 336 } else 337 ++priv->cm.nonsrq_conn_qp; 338 339 spin_unlock_irq(&priv->lock); 340 341 for (i = 0; i < ipoib_recvq_size; ++i) { 342 if (!ipoib_cm_alloc_rx_mb(priv, &rx->rx_ring[i])) { 343 ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); 344 ret = -ENOMEM; 345 goto err_count; 346 } 347 ret = ipoib_cm_post_receive_nonsrq(priv, rx, &t->wr, t->sge, i); 348 if (ret) { 349 ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq " 350 "failed for buf %d\n", i); 351 ret = -EIO; 352 goto err_count; 353 } 354 } 355 356 rx->recv_count = ipoib_recvq_size; 357 358 kfree(t); 359 360 return 0; 361 362err_count: 363 spin_lock_irq(&priv->lock); 364 --priv->cm.nonsrq_conn_qp; 365 spin_unlock_irq(&priv->lock); 366 367err_free: 368 kfree(t); 369 ipoib_cm_free_rx_ring(priv, rx->rx_ring); 370 371 return ret; 372} 373 374static int ipoib_cm_send_rep(struct ipoib_dev_priv *priv, struct ib_cm_id *cm_id, 375 struct ib_qp *qp, struct ib_cm_req_event_param *req, 376 unsigned psn) 377{ 378 struct ipoib_cm_data data = {}; 379 struct ib_cm_rep_param rep = {}; 380 381 data.qpn = cpu_to_be32(priv->qp->qp_num); 382 data.mtu = cpu_to_be32(priv->cm.max_cm_mtu); 383 384 rep.private_data = &data; 385 rep.private_data_len = sizeof data; 386 rep.flow_control = 0; 387 rep.rnr_retry_count = req->rnr_retry_count; 388 rep.srq = ipoib_cm_has_srq(priv); 389 rep.qp_num = qp->qp_num; 390 rep.starting_psn = psn; 391 return ib_send_cm_rep(cm_id, &rep); 392} 393 394static int ipoib_cm_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) 395{ 396 struct ipoib_dev_priv *priv = cm_id->context; 397 struct ipoib_cm_rx *p; 398 unsigned psn; 399 int ret; 400 401 ipoib_dbg(priv, "REQ arrived\n"); 402 p = kzalloc(sizeof *p, GFP_KERNEL); 403 if (!p) 404 return -ENOMEM; 405 p->priv = priv; 406 p->id = cm_id; 407 cm_id->context = p; 408 p->state = IPOIB_CM_RX_LIVE; 409 p->jiffies = jiffies; 410 INIT_LIST_HEAD(&p->list); 411 412 p->qp = ipoib_cm_create_rx_qp(priv, p); 413 if (IS_ERR(p->qp)) { 414 ret = PTR_ERR(p->qp); 415 goto err_qp; 416 } 417 418 psn = random() & 0xffffff; 419 ret = ipoib_cm_modify_rx_qp(priv, cm_id, p->qp, psn); 420 if (ret) 421 goto err_modify; 422 423 if (!ipoib_cm_has_srq(priv)) { 424 ret = ipoib_cm_nonsrq_init_rx(priv, cm_id, p); 425 if (ret) 426 goto err_modify; 427 } 428 429 spin_lock_irq(&priv->lock); 430 queue_delayed_work(ipoib_workqueue, 431 &priv->cm.stale_task, IPOIB_CM_RX_DELAY); 432 /* Add this entry to passive ids list head, but do not re-add it 433 * if IB_EVENT_QP_LAST_WQE_REACHED has moved it to flush list. */ 434 p->jiffies = jiffies; 435 if (p->state == IPOIB_CM_RX_LIVE) 436 list_move(&p->list, &priv->cm.passive_ids); 437 spin_unlock_irq(&priv->lock); 438 439 ret = ipoib_cm_send_rep(priv, cm_id, p->qp, &event->param.req_rcvd, psn); 440 if (ret) { 441 ipoib_warn(priv, "failed to send REP: %d\n", ret); 442 if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) 443 ipoib_warn(priv, "unable to move qp to error state\n"); 444 } 445 return 0; 446 447err_modify: 448 ib_destroy_qp(p->qp); 449err_qp: 450 kfree(p); 451 return ret; 452} 453 454static int ipoib_cm_rx_handler(struct ib_cm_id *cm_id, 455 struct ib_cm_event *event) 456{ 457 struct ipoib_cm_rx *p; 458 struct ipoib_dev_priv *priv; 459 460 switch (event->event) { 461 case IB_CM_REQ_RECEIVED: 462 return ipoib_cm_req_handler(cm_id, event); 463 case IB_CM_DREQ_RECEIVED: 464 p = cm_id->context; 465 ib_send_cm_drep(cm_id, NULL, 0); 466 /* Fall through */ 467 case IB_CM_REJ_RECEIVED: 468 p = cm_id->context; 469 priv = p->priv; 470 if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) 471 ipoib_warn(priv, "unable to move qp to error state\n"); 472 /* Fall through */ 473 default: 474 return 0; 475 } 476} 477 478void ipoib_cm_handle_rx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc) 479{ 480 struct ipoib_cm_rx_buf saverx; 481 struct ipoib_cm_rx_buf *rx_ring; 482 unsigned int wr_id = wc->wr_id & ~(IPOIB_OP_CM | IPOIB_OP_RECV); 483 struct ifnet *dev = priv->dev; 484 struct mbuf *mb, *newmb; 485 struct ipoib_cm_rx *p; 486 int has_srq; 487 488 ipoib_dbg_data(priv, "cm recv completion: id %d, status: %d\n", 489 wr_id, wc->status); 490 491 if (unlikely(wr_id >= ipoib_recvq_size)) { 492 if (wr_id == (IPOIB_CM_RX_DRAIN_WRID & ~(IPOIB_OP_CM | IPOIB_OP_RECV))) { 493 spin_lock(&priv->lock); 494 list_splice_init(&priv->cm.rx_drain_list, &priv->cm.rx_reap_list); 495 ipoib_cm_start_rx_drain(priv); 496 if (priv->cm.id != NULL) 497 queue_work(ipoib_workqueue, 498 &priv->cm.rx_reap_task); 499 spin_unlock(&priv->lock); 500 } else 501 ipoib_warn(priv, "cm recv completion event with wrid %d (> %d)\n", 502 wr_id, ipoib_recvq_size); 503 goto done; 504 } 505 506 p = wc->qp->qp_context; 507 508 has_srq = ipoib_cm_has_srq(priv); 509 rx_ring = has_srq ? priv->cm.srq_ring : p->rx_ring; 510 511 mb = rx_ring[wr_id].mb; 512 513 if (unlikely(wc->status != IB_WC_SUCCESS)) { 514 ipoib_dbg(priv, "cm recv error " 515 "(status=%d, wrid=%d vend_err %x)\n", 516 wc->status, wr_id, wc->vendor_err); 517 if_inc_counter(dev, IFCOUNTER_IERRORS, 1); 518 if (has_srq) 519 goto repost; 520 else { 521 if (!--p->recv_count) { 522 spin_lock(&priv->lock); 523 list_move(&p->list, &priv->cm.rx_reap_list); 524 queue_work(ipoib_workqueue, &priv->cm.rx_reap_task); 525 spin_unlock(&priv->lock); 526 } 527 goto done; 528 } 529 } 530 531 if (unlikely(!(wr_id & IPOIB_CM_RX_UPDATE_MASK))) { 532 if (p && time_after_eq(jiffies, p->jiffies + IPOIB_CM_RX_UPDATE_TIME)) { 533 p->jiffies = jiffies; 534 /* Move this entry to list head, but do not re-add it 535 * if it has been moved out of list. */ 536 if (p->state == IPOIB_CM_RX_LIVE) 537 list_move(&p->list, &priv->cm.passive_ids); 538 } 539 } 540 541 memcpy(&saverx, &rx_ring[wr_id], sizeof(saverx)); 542 newmb = ipoib_cm_alloc_rx_mb(priv, &rx_ring[wr_id]); 543 if (unlikely(!newmb)) { 544 /* 545 * If we can't allocate a new RX buffer, dump 546 * this packet and reuse the old buffer. 547 */ 548 ipoib_dbg(priv, "failed to allocate receive buffer %d\n", wr_id); 549 if_inc_counter(dev, IFCOUNTER_IERRORS, 1); 550 memcpy(&rx_ring[wr_id], &saverx, sizeof(saverx)); 551 goto repost; 552 } 553 554 ipoib_cm_dma_unmap_rx(priv, &saverx); 555 556 ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", 557 wc->byte_len, wc->slid); 558 559 ipoib_dma_mb(priv, mb, wc->byte_len); 560 561 mb->m_pkthdr.rcvif = dev; 562 563 M_PREPEND(mb, sizeof(struct ipoib_pseudoheader), M_NOWAIT); 564 if (likely(mb != NULL)) { 565 struct ipoib_header *ibh; 566 567 if_inc_counter(dev, IFCOUNTER_IPACKETS, 1); 568 if_inc_counter(dev, IFCOUNTER_IBYTES, mb->m_pkthdr.len); 569 570 /* fixup destination infiniband address */ 571 ibh = mtod(mb, struct ipoib_header *); 572 memset(ibh->hwaddr, 0, 4); 573 memcpy(ibh->hwaddr + 4, priv->local_gid.raw, sizeof(union ib_gid)); 574 575 dev->if_input(dev, mb); 576 } else { 577 if_inc_counter(dev, IFCOUNTER_IERRORS, 1); 578 } 579repost: 580 if (has_srq) { 581 if (unlikely(ipoib_cm_post_receive_srq(priv, wr_id))) 582 ipoib_warn(priv, "ipoib_cm_post_receive_srq failed " 583 "for buf %d\n", wr_id); 584 } else { 585 if (unlikely(ipoib_cm_post_receive_nonsrq(priv, p, 586 &priv->cm.rx_wr, 587 priv->cm.rx_sge, 588 wr_id))) { 589 --p->recv_count; 590 ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq failed " 591 "for buf %d\n", wr_id); 592 } 593 } 594done: 595 return; 596} 597 598static inline int post_send(struct ipoib_dev_priv *priv, 599 struct ipoib_cm_tx *tx, 600 struct ipoib_cm_tx_buf *tx_req, 601 unsigned int wr_id) 602{ 603 struct ib_send_wr *bad_wr; 604 struct mbuf *mb = tx_req->mb; 605 u64 *mapping = tx_req->mapping; 606 struct mbuf *m; 607 int i; 608 609 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) { 610 priv->tx_sge[i].addr = mapping[i]; 611 priv->tx_sge[i].length = m->m_len; 612 } 613 priv->tx_wr.wr.num_sge = i; 614 priv->tx_wr.wr.wr_id = wr_id | IPOIB_OP_CM; 615 priv->tx_wr.wr.opcode = IB_WR_SEND; 616 617 return ib_post_send(tx->qp, &priv->tx_wr.wr, &bad_wr); 618} 619 620void ipoib_cm_send(struct ipoib_dev_priv *priv, struct mbuf *mb, struct ipoib_cm_tx *tx) 621{ 622 struct ipoib_cm_tx_buf *tx_req; 623 struct ifnet *dev = priv->dev; 624 625 if (unlikely(priv->tx_outstanding > MAX_SEND_CQE)) { 626 while (ipoib_poll_tx(priv, false)) 627 ; /* nothing */ 628 } 629 630 m_adj(mb, sizeof(struct ipoib_pseudoheader)); 631 if (unlikely(mb->m_pkthdr.len > tx->mtu)) { 632 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", 633 mb->m_pkthdr.len, tx->mtu); 634 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 635 ipoib_cm_mb_too_long(priv, mb, IPOIB_CM_MTU(tx->mtu)); 636 return; 637 } 638 639 ipoib_dbg_data(priv, "sending packet: head 0x%x length %d connection 0x%x\n", 640 tx->tx_head, mb->m_pkthdr.len, tx->qp->qp_num); 641 642 643 /* 644 * We put the mb into the tx_ring _before_ we call post_send() 645 * because it's entirely possible that the completion handler will 646 * run before we execute anything after the post_send(). That 647 * means we have to make sure everything is properly recorded and 648 * our state is consistent before we call post_send(). 649 */ 650 tx_req = &tx->tx_ring[tx->tx_head & (ipoib_sendq_size - 1)]; 651 tx_req->mb = mb; 652 if (unlikely(ipoib_dma_map_tx(priv->ca, (struct ipoib_tx_buf *)tx_req, 653 priv->cm.num_frags))) { 654 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 655 if (tx_req->mb) 656 m_freem(tx_req->mb); 657 return; 658 } 659 660 if (unlikely(post_send(priv, tx, tx_req, tx->tx_head & (ipoib_sendq_size - 1)))) { 661 ipoib_warn(priv, "post_send failed\n"); 662 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 663 ipoib_dma_unmap_tx(priv->ca, (struct ipoib_tx_buf *)tx_req); 664 m_freem(mb); 665 } else { 666 ++tx->tx_head; 667 668 if (++priv->tx_outstanding == ipoib_sendq_size) { 669 ipoib_dbg(priv, "TX ring 0x%x full, stopping kernel net queue\n", 670 tx->qp->qp_num); 671 if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP)) 672 ipoib_warn(priv, "request notify on send CQ failed\n"); 673 dev->if_drv_flags |= IFF_DRV_OACTIVE; 674 } 675 } 676 677} 678 679void ipoib_cm_handle_tx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc) 680{ 681 struct ipoib_cm_tx *tx = wc->qp->qp_context; 682 unsigned int wr_id = wc->wr_id & ~IPOIB_OP_CM; 683 struct ifnet *dev = priv->dev; 684 struct ipoib_cm_tx_buf *tx_req; 685 686 ipoib_dbg_data(priv, "cm send completion: id %d, status: %d\n", 687 wr_id, wc->status); 688 689 if (unlikely(wr_id >= ipoib_sendq_size)) { 690 ipoib_warn(priv, "cm send completion event with wrid %d (> %d)\n", 691 wr_id, ipoib_sendq_size); 692 return; 693 } 694 695 tx_req = &tx->tx_ring[wr_id]; 696 697 ipoib_dma_unmap_tx(priv->ca, (struct ipoib_tx_buf *)tx_req); 698 699 /* FIXME: is this right? Shouldn't we only increment on success? */ 700 if_inc_counter(dev, IFCOUNTER_OPACKETS, 1); 701 702 m_freem(tx_req->mb); 703 704 ++tx->tx_tail; 705 if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && 706 (dev->if_drv_flags & IFF_DRV_OACTIVE) != 0 && 707 test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 708 dev->if_drv_flags &= ~IFF_DRV_OACTIVE; 709 710 if (wc->status != IB_WC_SUCCESS && 711 wc->status != IB_WC_WR_FLUSH_ERR) { 712 struct ipoib_path *path; 713 714 ipoib_dbg(priv, "failed cm send event " 715 "(status=%d, wrid=%d vend_err %x)\n", 716 wc->status, wr_id, wc->vendor_err); 717 718 path = tx->path; 719 720 if (path) { 721 path->cm = NULL; 722 rb_erase(&path->rb_node, &priv->path_tree); 723 list_del(&path->list); 724 } 725 726 if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { 727 list_move(&tx->list, &priv->cm.reap_list); 728 queue_work(ipoib_workqueue, &priv->cm.reap_task); 729 } 730 731 clear_bit(IPOIB_FLAG_OPER_UP, &tx->flags); 732 } 733 734} 735 736int ipoib_cm_dev_open(struct ipoib_dev_priv *priv) 737{ 738 int ret; 739 740 if (!IPOIB_CM_SUPPORTED(IF_LLADDR(priv->dev))) 741 return 0; 742 743 priv->cm.id = ib_create_cm_id(priv->ca, ipoib_cm_rx_handler, priv); 744 if (IS_ERR(priv->cm.id)) { 745 printk(KERN_WARNING "%s: failed to create CM ID\n", priv->ca->name); 746 ret = PTR_ERR(priv->cm.id); 747 goto err_cm; 748 } 749 750 ret = ib_cm_listen(priv->cm.id, cpu_to_be64(IPOIB_CM_IETF_ID | priv->qp->qp_num), 0); 751 if (ret) { 752 printk(KERN_WARNING "%s: failed to listen on ID 0x%llx\n", priv->ca->name, 753 IPOIB_CM_IETF_ID | priv->qp->qp_num); 754 goto err_listen; 755 } 756 757 return 0; 758 759err_listen: 760 ib_destroy_cm_id(priv->cm.id); 761err_cm: 762 priv->cm.id = NULL; 763 return ret; 764} 765 766static void ipoib_cm_free_rx_reap_list(struct ipoib_dev_priv *priv) 767{ 768 struct ipoib_cm_rx *rx, *n; 769 LIST_HEAD(list); 770 771 spin_lock_irq(&priv->lock); 772 list_splice_init(&priv->cm.rx_reap_list, &list); 773 spin_unlock_irq(&priv->lock); 774 775 list_for_each_entry_safe(rx, n, &list, list) { 776 ib_destroy_cm_id(rx->id); 777 ib_destroy_qp(rx->qp); 778 if (!ipoib_cm_has_srq(priv)) { 779 ipoib_cm_free_rx_ring(priv, rx->rx_ring); 780 spin_lock_irq(&priv->lock); 781 --priv->cm.nonsrq_conn_qp; 782 spin_unlock_irq(&priv->lock); 783 } 784 kfree(rx); 785 } 786} 787 788void ipoib_cm_dev_stop(struct ipoib_dev_priv *priv) 789{ 790 struct ipoib_cm_rx *p; 791 unsigned long begin; 792 int ret; 793 794 if (!IPOIB_CM_SUPPORTED(IF_LLADDR(priv->dev)) || !priv->cm.id) 795 return; 796 797 ib_destroy_cm_id(priv->cm.id); 798 priv->cm.id = NULL; 799 800 cancel_work_sync(&priv->cm.rx_reap_task); 801 802 spin_lock_irq(&priv->lock); 803 while (!list_empty(&priv->cm.passive_ids)) { 804 p = list_entry(priv->cm.passive_ids.next, typeof(*p), list); 805 list_move(&p->list, &priv->cm.rx_error_list); 806 p->state = IPOIB_CM_RX_ERROR; 807 spin_unlock_irq(&priv->lock); 808 ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); 809 if (ret) 810 ipoib_warn(priv, "unable to move qp to error state: %d\n", ret); 811 spin_lock_irq(&priv->lock); 812 } 813 814 /* Wait for all RX to be drained */ 815 begin = jiffies; 816 817 while (!list_empty(&priv->cm.rx_error_list) || 818 !list_empty(&priv->cm.rx_flush_list) || 819 !list_empty(&priv->cm.rx_drain_list)) { 820 if (time_after(jiffies, begin + 5 * HZ)) { 821 ipoib_warn(priv, "RX drain timing out\n"); 822 823 /* 824 * assume the HW is wedged and just free up everything. 825 */ 826 list_splice_init(&priv->cm.rx_flush_list, 827 &priv->cm.rx_reap_list); 828 list_splice_init(&priv->cm.rx_error_list, 829 &priv->cm.rx_reap_list); 830 list_splice_init(&priv->cm.rx_drain_list, 831 &priv->cm.rx_reap_list); 832 break; 833 } 834 spin_unlock_irq(&priv->lock); 835 msleep(1); 836 ipoib_drain_cq(priv); 837 spin_lock_irq(&priv->lock); 838 } 839 840 spin_unlock_irq(&priv->lock); 841 842 ipoib_cm_free_rx_reap_list(priv); 843 844 cancel_delayed_work_sync(&priv->cm.stale_task); 845} 846 847static int ipoib_cm_rep_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) 848{ 849 struct ipoib_cm_tx *p = cm_id->context; 850 struct ipoib_dev_priv *priv = p->priv; 851 struct ipoib_cm_data *data = event->private_data; 852 struct ifqueue mbqueue; 853 struct ib_qp_attr qp_attr; 854 int qp_attr_mask, ret; 855 struct mbuf *mb; 856 857 ipoib_dbg(priv, "cm rep handler\n"); 858 p->mtu = be32_to_cpu(data->mtu); 859 860 if (p->mtu <= IPOIB_ENCAP_LEN) { 861 ipoib_warn(priv, "Rejecting connection: mtu %d <= %d\n", 862 p->mtu, IPOIB_ENCAP_LEN); 863 return -EINVAL; 864 } 865 866 qp_attr.qp_state = IB_QPS_RTR; 867 ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); 868 if (ret) { 869 ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); 870 return ret; 871 } 872 873 qp_attr.rq_psn = 0 /* FIXME */; 874 ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); 875 if (ret) { 876 ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); 877 return ret; 878 } 879 880 qp_attr.qp_state = IB_QPS_RTS; 881 ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); 882 if (ret) { 883 ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); 884 return ret; 885 } 886 ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); 887 if (ret) { 888 ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); 889 return ret; 890 } 891 892 bzero(&mbqueue, sizeof(mbqueue)); 893 894 spin_lock_irq(&priv->lock); 895 set_bit(IPOIB_FLAG_OPER_UP, &p->flags); 896 if (p->path) 897 for (;;) { 898 _IF_DEQUEUE(&p->path->queue, mb); 899 if (mb == NULL) 900 break; 901 _IF_ENQUEUE(&mbqueue, mb); 902 } 903 spin_unlock_irq(&priv->lock); 904 905 for (;;) { 906 struct ifnet *dev = p->priv->dev; 907 _IF_DEQUEUE(&mbqueue, mb); 908 if (mb == NULL) 909 break; 910 mb->m_pkthdr.rcvif = dev; 911 if (dev->if_transmit(dev, mb)) 912 ipoib_warn(priv, "dev_queue_xmit failed " 913 "to requeue packet\n"); 914 } 915 916 ret = ib_send_cm_rtu(cm_id, NULL, 0); 917 if (ret) { 918 ipoib_warn(priv, "failed to send RTU: %d\n", ret); 919 return ret; 920 } 921 return 0; 922} 923 924static struct ib_qp *ipoib_cm_create_tx_qp(struct ipoib_dev_priv *priv, 925 struct ipoib_cm_tx *tx) 926{ 927 struct ib_qp_init_attr attr = { 928 .send_cq = priv->send_cq, 929 .recv_cq = priv->recv_cq, 930 .srq = priv->cm.srq, 931 .cap.max_send_wr = ipoib_sendq_size, 932 .cap.max_send_sge = priv->cm.num_frags, 933 .sq_sig_type = IB_SIGNAL_ALL_WR, 934 .qp_type = IB_QPT_RC, 935 .qp_context = tx 936 }; 937 938 return ib_create_qp(priv->pd, &attr); 939} 940 941static int ipoib_cm_send_req(struct ipoib_dev_priv *priv, 942 struct ib_cm_id *id, struct ib_qp *qp, 943 u32 qpn, 944 struct ib_sa_path_rec *pathrec) 945{ 946 struct ipoib_cm_data data = {}; 947 struct ib_cm_req_param req = {}; 948 949 ipoib_dbg(priv, "cm send req\n"); 950 951 data.qpn = cpu_to_be32(priv->qp->qp_num); 952 data.mtu = cpu_to_be32(priv->cm.max_cm_mtu); 953 954 req.primary_path = pathrec; 955 req.alternate_path = NULL; 956 req.service_id = cpu_to_be64(IPOIB_CM_IETF_ID | qpn); 957 req.qp_num = qp->qp_num; 958 req.qp_type = qp->qp_type; 959 req.private_data = &data; 960 req.private_data_len = sizeof data; 961 req.flow_control = 0; 962 963 req.starting_psn = 0; /* FIXME */ 964 965 /* 966 * Pick some arbitrary defaults here; we could make these 967 * module parameters if anyone cared about setting them. 968 */ 969 req.responder_resources = 4; 970 req.remote_cm_response_timeout = 20; 971 req.local_cm_response_timeout = 20; 972 req.retry_count = 0; /* RFC draft warns against retries */ 973 req.rnr_retry_count = 0; /* RFC draft warns against retries */ 974 req.max_cm_retries = 15; 975 req.srq = ipoib_cm_has_srq(priv); 976 return ib_send_cm_req(id, &req); 977} 978 979static int ipoib_cm_modify_tx_init(struct ipoib_dev_priv *priv, 980 struct ib_cm_id *cm_id, struct ib_qp *qp) 981{ 982 struct ib_qp_attr qp_attr; 983 int qp_attr_mask, ret; 984 ret = ib_find_pkey(priv->ca, priv->port, priv->pkey, &qp_attr.pkey_index); 985 if (ret) { 986 ipoib_warn(priv, "pkey 0x%x not found: %d\n", priv->pkey, ret); 987 return ret; 988 } 989 990 qp_attr.qp_state = IB_QPS_INIT; 991 qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE; 992 qp_attr.port_num = priv->port; 993 qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | IB_QP_PKEY_INDEX | IB_QP_PORT; 994 995 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 996 if (ret) { 997 ipoib_warn(priv, "failed to modify tx QP to INIT: %d\n", ret); 998 return ret; 999 } 1000 return 0; 1001} 1002 1003static int ipoib_cm_tx_init(struct ipoib_cm_tx *p, u32 qpn, 1004 struct ib_sa_path_rec *pathrec) 1005{ 1006 struct ipoib_dev_priv *priv = p->priv; 1007 int ret; 1008 1009 p->tx_ring = kzalloc(ipoib_sendq_size * sizeof *p->tx_ring, GFP_KERNEL); 1010 if (!p->tx_ring) { 1011 ipoib_warn(priv, "failed to allocate tx ring\n"); 1012 ret = -ENOMEM; 1013 goto err_tx; 1014 } 1015 memset(p->tx_ring, 0, ipoib_sendq_size * sizeof *p->tx_ring); 1016 1017 p->qp = ipoib_cm_create_tx_qp(p->priv, p); 1018 if (IS_ERR(p->qp)) { 1019 ret = PTR_ERR(p->qp); 1020 ipoib_warn(priv, "failed to allocate tx qp: %d\n", ret); 1021 goto err_qp; 1022 } 1023 1024 p->id = ib_create_cm_id(priv->ca, ipoib_cm_tx_handler, p); 1025 if (IS_ERR(p->id)) { 1026 ret = PTR_ERR(p->id); 1027 ipoib_warn(priv, "failed to create tx cm id: %d\n", ret); 1028 goto err_id; 1029 } 1030 1031 ret = ipoib_cm_modify_tx_init(p->priv, p->id, p->qp); 1032 if (ret) { 1033 ipoib_warn(priv, "failed to modify tx qp to rtr: %d\n", ret); 1034 goto err_modify; 1035 } 1036 1037 ret = ipoib_cm_send_req(p->priv, p->id, p->qp, qpn, pathrec); 1038 if (ret) { 1039 ipoib_warn(priv, "failed to send cm req: %d\n", ret); 1040 goto err_send_cm; 1041 } 1042 1043 ipoib_dbg(priv, "Request connection 0x%x for gid %pI6 qpn 0x%x\n", 1044 p->qp->qp_num, pathrec->dgid.raw, qpn); 1045 1046 return 0; 1047 1048err_send_cm: 1049err_modify: 1050 ib_destroy_cm_id(p->id); 1051err_id: 1052 p->id = NULL; 1053 ib_destroy_qp(p->qp); 1054err_qp: 1055 p->qp = NULL; 1056 kfree(p->tx_ring); 1057err_tx: 1058 return ret; 1059} 1060 1061static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p) 1062{ 1063 struct ipoib_dev_priv *priv = p->priv; 1064 struct ifnet *dev = priv->dev; 1065 struct ipoib_cm_tx_buf *tx_req; 1066 unsigned long begin; 1067 1068 ipoib_dbg(priv, "Destroy active connection 0x%x head 0x%x tail 0x%x\n", 1069 p->qp ? p->qp->qp_num : 0, p->tx_head, p->tx_tail); 1070 1071 if (p->path) 1072 ipoib_path_free(priv, p->path); 1073 1074 if (p->id) 1075 ib_destroy_cm_id(p->id); 1076 1077 if (p->tx_ring) { 1078 /* Wait for all sends to complete */ 1079 begin = jiffies; 1080 while ((int) p->tx_tail - (int) p->tx_head < 0) { 1081 if (time_after(jiffies, begin + 5 * HZ)) { 1082 ipoib_warn(priv, "timing out; %d sends not completed\n", 1083 p->tx_head - p->tx_tail); 1084 goto timeout; 1085 } 1086 1087 msleep(1); 1088 } 1089 } 1090 1091timeout: 1092 1093 while ((int) p->tx_tail - (int) p->tx_head < 0) { 1094 tx_req = &p->tx_ring[p->tx_tail & (ipoib_sendq_size - 1)]; 1095 ipoib_dma_unmap_tx(priv->ca, (struct ipoib_tx_buf *)tx_req); 1096 m_freem(tx_req->mb); 1097 ++p->tx_tail; 1098 if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && 1099 (dev->if_drv_flags & IFF_DRV_OACTIVE) != 0 && 1100 test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 1101 dev->if_drv_flags &= ~IFF_DRV_OACTIVE; 1102 } 1103 1104 if (p->qp) 1105 ib_destroy_qp(p->qp); 1106 1107 kfree(p->tx_ring); 1108 kfree(p); 1109} 1110 1111static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, 1112 struct ib_cm_event *event) 1113{ 1114 struct ipoib_cm_tx *tx = cm_id->context; 1115 struct ipoib_dev_priv *priv = tx->priv; 1116 struct ipoib_path *path; 1117 unsigned long flags; 1118 int ret; 1119 1120 switch (event->event) { 1121 case IB_CM_DREQ_RECEIVED: 1122 ipoib_dbg(priv, "DREQ received.\n"); 1123 ib_send_cm_drep(cm_id, NULL, 0); 1124 break; 1125 case IB_CM_REP_RECEIVED: 1126 ipoib_dbg(priv, "REP received.\n"); 1127 ret = ipoib_cm_rep_handler(cm_id, event); 1128 if (ret) 1129 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, 1130 NULL, 0, NULL, 0); 1131 break; 1132 case IB_CM_REQ_ERROR: 1133 case IB_CM_REJ_RECEIVED: 1134 case IB_CM_TIMEWAIT_EXIT: 1135 ipoib_dbg(priv, "CM error %d.\n", event->event); 1136 spin_lock_irqsave(&priv->lock, flags); 1137 path = tx->path; 1138 1139 if (path) { 1140 path->cm = NULL; 1141 tx->path = NULL; 1142 rb_erase(&path->rb_node, &priv->path_tree); 1143 list_del(&path->list); 1144 } 1145 1146 if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { 1147 list_move(&tx->list, &priv->cm.reap_list); 1148 queue_work(ipoib_workqueue, &priv->cm.reap_task); 1149 } 1150 1151 spin_unlock_irqrestore(&priv->lock, flags); 1152 if (path) 1153 ipoib_path_free(tx->priv, path); 1154 break; 1155 default: 1156 break; 1157 } 1158 1159 return 0; 1160} 1161 1162struct ipoib_cm_tx *ipoib_cm_create_tx(struct ipoib_dev_priv *priv, 1163 struct ipoib_path *path) 1164{ 1165 struct ipoib_cm_tx *tx; 1166 1167 tx = kzalloc(sizeof *tx, GFP_ATOMIC); 1168 if (!tx) 1169 return NULL; 1170 1171 ipoib_dbg(priv, "Creating cm tx\n"); 1172 path->cm = tx; 1173 tx->path = path; 1174 tx->priv = priv; 1175 list_add(&tx->list, &priv->cm.start_list); 1176 set_bit(IPOIB_FLAG_INITIALIZED, &tx->flags); 1177 queue_work(ipoib_workqueue, &priv->cm.start_task); 1178 return tx; 1179} 1180 1181void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx) 1182{ 1183 struct ipoib_dev_priv *priv = tx->priv; 1184 if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { 1185 spin_lock(&priv->lock); 1186 list_move(&tx->list, &priv->cm.reap_list); 1187 spin_unlock(&priv->lock); 1188 queue_work(ipoib_workqueue, &priv->cm.reap_task); 1189 ipoib_dbg(priv, "Reap connection for gid %pI6\n", 1190 tx->path->pathrec.dgid.raw); 1191 tx->path = NULL; 1192 } 1193} 1194 1195static void ipoib_cm_tx_start(struct work_struct *work) 1196{ 1197 struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, 1198 cm.start_task); 1199 struct ipoib_path *path; 1200 struct ipoib_cm_tx *p; 1201 unsigned long flags; 1202 int ret; 1203 1204 struct ib_sa_path_rec pathrec; 1205 u32 qpn; 1206 1207 ipoib_dbg(priv, "cm start task\n"); 1208 spin_lock_irqsave(&priv->lock, flags); 1209 1210 while (!list_empty(&priv->cm.start_list)) { 1211 p = list_entry(priv->cm.start_list.next, typeof(*p), list); 1212 list_del_init(&p->list); 1213 path = p->path; 1214 qpn = IPOIB_QPN(path->hwaddr); 1215 memcpy(&pathrec, &p->path->pathrec, sizeof pathrec); 1216 1217 spin_unlock_irqrestore(&priv->lock, flags); 1218 1219 ret = ipoib_cm_tx_init(p, qpn, &pathrec); 1220 1221 spin_lock_irqsave(&priv->lock, flags); 1222 1223 if (ret) { 1224 path = p->path; 1225 if (path) { 1226 path->cm = NULL; 1227 rb_erase(&path->rb_node, &priv->path_tree); 1228 list_del(&path->list); 1229 ipoib_path_free(priv, path); 1230 } 1231 list_del(&p->list); 1232 kfree(p); 1233 } 1234 } 1235 1236 spin_unlock_irqrestore(&priv->lock, flags); 1237} 1238 1239static void ipoib_cm_tx_reap(struct work_struct *work) 1240{ 1241 struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, 1242 cm.reap_task); 1243 struct ipoib_cm_tx *p; 1244 unsigned long flags; 1245 1246 spin_lock_irqsave(&priv->lock, flags); 1247 1248 while (!list_empty(&priv->cm.reap_list)) { 1249 p = list_entry(priv->cm.reap_list.next, typeof(*p), list); 1250 list_del(&p->list); 1251 spin_unlock_irqrestore(&priv->lock, flags); 1252 ipoib_cm_tx_destroy(p); 1253 spin_lock_irqsave(&priv->lock, flags); 1254 } 1255 1256 spin_unlock_irqrestore(&priv->lock, flags); 1257} 1258 1259static void ipoib_cm_mb_reap(struct work_struct *work) 1260{ 1261 struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, 1262 cm.mb_task); 1263 struct mbuf *mb; 1264 unsigned long flags; 1265#if defined(INET) || defined(INET6) 1266 unsigned mtu = priv->mcast_mtu; 1267#endif 1268 uint16_t proto; 1269 1270 spin_lock_irqsave(&priv->lock, flags); 1271 1272 CURVNET_SET_QUIET(priv->dev->if_vnet); 1273 1274 for (;;) { 1275 IF_DEQUEUE(&priv->cm.mb_queue, mb); 1276 if (mb == NULL) 1277 break; 1278 spin_unlock_irqrestore(&priv->lock, flags); 1279 1280 proto = htons(*mtod(mb, uint16_t *)); 1281 m_adj(mb, IPOIB_ENCAP_LEN); 1282 switch (proto) { 1283#if defined(INET) 1284 case ETHERTYPE_IP: 1285 icmp_error(mb, ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG, 0, mtu); 1286 break; 1287#endif 1288#if defined(INET6) 1289 case ETHERTYPE_IPV6: 1290 icmp6_error(mb, ICMP6_PACKET_TOO_BIG, 0, mtu); 1291 break; 1292#endif 1293 default: 1294 m_freem(mb); 1295 } 1296 1297 spin_lock_irqsave(&priv->lock, flags); 1298 } 1299 1300 CURVNET_RESTORE(); 1301 1302 spin_unlock_irqrestore(&priv->lock, flags); 1303} 1304 1305void 1306ipoib_cm_mb_too_long(struct ipoib_dev_priv *priv, struct mbuf *mb, unsigned int mtu) 1307{ 1308 int e = priv->cm.mb_queue.ifq_len; 1309 1310 IF_ENQUEUE(&priv->cm.mb_queue, mb); 1311 if (e == 0) 1312 queue_work(ipoib_workqueue, &priv->cm.mb_task); 1313} 1314 1315static void ipoib_cm_rx_reap(struct work_struct *work) 1316{ 1317 ipoib_cm_free_rx_reap_list(container_of(work, struct ipoib_dev_priv, 1318 cm.rx_reap_task)); 1319} 1320 1321static void ipoib_cm_stale_task(struct work_struct *work) 1322{ 1323 struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, 1324 cm.stale_task.work); 1325 struct ipoib_cm_rx *p; 1326 int ret; 1327 1328 spin_lock_irq(&priv->lock); 1329 while (!list_empty(&priv->cm.passive_ids)) { 1330 /* List is sorted by LRU, start from tail, 1331 * stop when we see a recently used entry */ 1332 p = list_entry(priv->cm.passive_ids.prev, typeof(*p), list); 1333 if (time_before_eq(jiffies, p->jiffies + IPOIB_CM_RX_TIMEOUT)) 1334 break; 1335 list_move(&p->list, &priv->cm.rx_error_list); 1336 p->state = IPOIB_CM_RX_ERROR; 1337 spin_unlock_irq(&priv->lock); 1338 ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); 1339 if (ret) 1340 ipoib_warn(priv, "unable to move qp to error state: %d\n", ret); 1341 spin_lock_irq(&priv->lock); 1342 } 1343 1344 if (!list_empty(&priv->cm.passive_ids)) 1345 queue_delayed_work(ipoib_workqueue, 1346 &priv->cm.stale_task, IPOIB_CM_RX_DELAY); 1347 spin_unlock_irq(&priv->lock); 1348} 1349 1350 1351static void ipoib_cm_create_srq(struct ipoib_dev_priv *priv, int max_sge) 1352{ 1353 struct ib_srq_init_attr srq_init_attr = { 1354 .attr = { 1355 .max_wr = ipoib_recvq_size, 1356 .max_sge = max_sge 1357 } 1358 }; 1359 1360 priv->cm.srq = ib_create_srq(priv->pd, &srq_init_attr); 1361 if (IS_ERR(priv->cm.srq)) { 1362 if (PTR_ERR(priv->cm.srq) != -ENOSYS) 1363 printk(KERN_WARNING "%s: failed to allocate SRQ, error %ld\n", 1364 priv->ca->name, PTR_ERR(priv->cm.srq)); 1365 priv->cm.srq = NULL; 1366 return; 1367 } 1368 1369 priv->cm.srq_ring = kzalloc(ipoib_recvq_size * sizeof *priv->cm.srq_ring, GFP_KERNEL); 1370 if (!priv->cm.srq_ring) { 1371 printk(KERN_WARNING "%s: failed to allocate CM SRQ ring (%d entries)\n", 1372 priv->ca->name, ipoib_recvq_size); 1373 ib_destroy_srq(priv->cm.srq); 1374 priv->cm.srq = NULL; 1375 return; 1376 } 1377 1378 memset(priv->cm.srq_ring, 0, ipoib_recvq_size * sizeof *priv->cm.srq_ring); 1379} 1380 1381int ipoib_cm_dev_init(struct ipoib_dev_priv *priv) 1382{ 1383 struct ifnet *dev = priv->dev; 1384 int i; 1385 int max_srq_sge; 1386 1387 INIT_LIST_HEAD(&priv->cm.passive_ids); 1388 INIT_LIST_HEAD(&priv->cm.reap_list); 1389 INIT_LIST_HEAD(&priv->cm.start_list); 1390 INIT_LIST_HEAD(&priv->cm.rx_error_list); 1391 INIT_LIST_HEAD(&priv->cm.rx_flush_list); 1392 INIT_LIST_HEAD(&priv->cm.rx_drain_list); 1393 INIT_LIST_HEAD(&priv->cm.rx_reap_list); 1394 INIT_WORK(&priv->cm.start_task, ipoib_cm_tx_start); 1395 INIT_WORK(&priv->cm.reap_task, ipoib_cm_tx_reap); 1396 INIT_WORK(&priv->cm.mb_task, ipoib_cm_mb_reap); 1397 INIT_WORK(&priv->cm.rx_reap_task, ipoib_cm_rx_reap); 1398 INIT_DELAYED_WORK(&priv->cm.stale_task, ipoib_cm_stale_task); 1399 1400 bzero(&priv->cm.mb_queue, sizeof(priv->cm.mb_queue)); 1401 mtx_init(&priv->cm.mb_queue.ifq_mtx, 1402 dev->if_xname, "if send queue", MTX_DEF); 1403 1404 max_srq_sge = priv->ca->attrs.max_srq_sge; 1405 1406 ipoib_dbg(priv, "max_srq_sge=%d\n", max_srq_sge); 1407 1408 max_srq_sge = min_t(int, IPOIB_CM_RX_SG, max_srq_sge); 1409 ipoib_cm_create_srq(priv, max_srq_sge); 1410 if (ipoib_cm_has_srq(priv)) { 1411 priv->cm.max_cm_mtu = max_srq_sge * MJUMPAGESIZE; 1412 priv->cm.num_frags = max_srq_sge; 1413 ipoib_dbg(priv, "max_cm_mtu = 0x%x, num_frags=%d\n", 1414 priv->cm.max_cm_mtu, priv->cm.num_frags); 1415 } else { 1416 priv->cm.max_cm_mtu = IPOIB_CM_MAX_MTU; 1417 priv->cm.num_frags = IPOIB_CM_RX_SG; 1418 } 1419 1420 ipoib_cm_init_rx_wr(priv, &priv->cm.rx_wr, priv->cm.rx_sge); 1421 1422 if (ipoib_cm_has_srq(priv)) { 1423 for (i = 0; i < ipoib_recvq_size; ++i) { 1424 if (!ipoib_cm_alloc_rx_mb(priv, &priv->cm.srq_ring[i])) { 1425 ipoib_warn(priv, "failed to allocate " 1426 "receive buffer %d\n", i); 1427 ipoib_cm_dev_cleanup(priv); 1428 return -ENOMEM; 1429 } 1430 1431 if (ipoib_cm_post_receive_srq(priv, i)) { 1432 ipoib_warn(priv, "ipoib_cm_post_receive_srq " 1433 "failed for buf %d\n", i); 1434 ipoib_cm_dev_cleanup(priv); 1435 return -EIO; 1436 } 1437 } 1438 } 1439 1440 IF_LLADDR(priv->dev)[0] = IPOIB_FLAGS_RC; 1441 return 0; 1442} 1443 1444void ipoib_cm_dev_cleanup(struct ipoib_dev_priv *priv) 1445{ 1446 int ret; 1447 1448 if (!priv->cm.srq) 1449 return; 1450 1451 ipoib_dbg(priv, "Cleanup ipoib connected mode.\n"); 1452 1453 ret = ib_destroy_srq(priv->cm.srq); 1454 if (ret) 1455 ipoib_warn(priv, "ib_destroy_srq failed: %d\n", ret); 1456 1457 priv->cm.srq = NULL; 1458 if (!priv->cm.srq_ring) 1459 return; 1460 1461 ipoib_cm_free_rx_ring(priv, priv->cm.srq_ring); 1462 priv->cm.srq_ring = NULL; 1463 1464 mtx_destroy(&priv->cm.mb_queue.ifq_mtx); 1465} 1466 1467#endif /* CONFIG_INFINIBAND_IPOIB_CM */ 1468