1 /* 2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 4 * Copyright (c) 2005 Mellanox Technologies. All rights reserved. 5 * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 */ 35 36 #include "ipoib.h" 37 38 #include <rdma/ib_cache.h> 39 40 #include <security/mac/mac_framework.h> 41 42 #include <linux/delay.h> 43 #include <linux/dma-mapping.h> 44 45 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA 46 static int data_debug_level; 47 48 module_param(data_debug_level, int, 0644); 49 MODULE_PARM_DESC(data_debug_level, 50 "Enable data path debug tracing if > 0"); 51 #endif 52 53 static DEFINE_MUTEX(pkey_mutex); 54 55 struct ipoib_ah *ipoib_create_ah(struct ipoib_dev_priv *priv, 56 struct ib_pd *pd, struct ib_ah_attr *attr) 57 { 58 struct ipoib_ah *ah; 59 60 ah = kmalloc(sizeof *ah, GFP_KERNEL); 61 if (!ah) 62 return NULL; 63 64 ah->priv = priv; 65 ah->last_send = 0; 66 kref_init(&ah->ref); 67 68 ah->ah = ib_create_ah(pd, attr); 69 if (IS_ERR(ah->ah)) { 70 kfree(ah); 71 ah = NULL; 72 } else 73 ipoib_dbg(priv, "Created ah %p\n", ah->ah); 74 75 return ah; 76 } 77 78 void ipoib_free_ah(struct kref *kref) 79 { 80 struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref); 81 struct ipoib_dev_priv *priv = ah->priv; 82 83 unsigned long flags; 84 85 spin_lock_irqsave(&priv->lock, flags); 86 list_add_tail(&ah->list, &priv->dead_ahs); 87 spin_unlock_irqrestore(&priv->lock, flags); 88 } 89 90 void 91 ipoib_dma_unmap_rx(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req) 92 { 93 struct mbuf *m; 94 int i; 95 96 for (i = 0, m = rx_req->mb; m != NULL; m = m->m_next, i++) 97 ib_dma_unmap_single(priv->ca, rx_req->mapping[i], m->m_len, 98 DMA_FROM_DEVICE); 99 } 100 101 void 102 ipoib_dma_mb(struct ipoib_dev_priv *priv, struct mbuf *mb, unsigned int length) 103 { 104 105 m_adj(mb, -(mb->m_pkthdr.len - length)); 106 } 107 108 struct mbuf * 109 ipoib_alloc_map_mb(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req, 110 int size) 111 { 112 struct mbuf *mb, *m; 113 int i, j; 114 115 rx_req->mb = NULL; 116 mb = m_getm2(NULL, size, M_NOWAIT, MT_DATA, M_PKTHDR); 117 if (mb == NULL) 118 return (NULL); 119 for (i = 0, m = mb; m != NULL; m = m->m_next, i++) { 120 m->m_len = M_SIZE(m); 121 mb->m_pkthdr.len += m->m_len; 122 rx_req->mapping[i] = ib_dma_map_single(priv->ca, 123 mtod(m, void *), m->m_len, DMA_FROM_DEVICE); 124 if (unlikely(ib_dma_mapping_error(priv->ca, 125 rx_req->mapping[i]))) 126 goto error; 127 128 } 129 rx_req->mb = mb; 130 return (mb); 131 error: 132 for (j = 0, m = mb; j < i; m = m->m_next, j++) 133 ib_dma_unmap_single(priv->ca, rx_req->mapping[j], m->m_len, 134 DMA_FROM_DEVICE); 135 m_freem(mb); 136 return (NULL); 137 138 } 139 140 static int ipoib_ib_post_receive(struct ipoib_dev_priv *priv, int id) 141 { 142 struct ipoib_rx_buf *rx_req; 143 struct ib_recv_wr *bad_wr; 144 struct mbuf *m; 145 int ret; 146 int i; 147 148 rx_req = &priv->rx_ring[id]; 149 for (m = rx_req->mb, i = 0; m != NULL; m = m->m_next, i++) { 150 priv->rx_sge[i].addr = rx_req->mapping[i]; 151 priv->rx_sge[i].length = m->m_len; 152 } 153 priv->rx_wr.num_sge = i; 154 priv->rx_wr.wr_id = id | IPOIB_OP_RECV; 155 156 ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr); 157 if (unlikely(ret)) { 158 ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret); 159 ipoib_dma_unmap_rx(priv, &priv->rx_ring[id]); 160 m_freem(priv->rx_ring[id].mb); 161 priv->rx_ring[id].mb = NULL; 162 } 163 164 return ret; 165 } 166 167 static struct mbuf * 168 ipoib_alloc_rx_mb(struct ipoib_dev_priv *priv, int id) 169 { 170 171 return ipoib_alloc_map_mb(priv, &priv->rx_ring[id], 172 priv->max_ib_mtu + IB_GRH_BYTES); 173 } 174 175 static int ipoib_ib_post_receives(struct ipoib_dev_priv *priv) 176 { 177 int i; 178 179 for (i = 0; i < ipoib_recvq_size; ++i) { 180 if (!ipoib_alloc_rx_mb(priv, i)) { 181 ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); 182 return -ENOMEM; 183 } 184 if (ipoib_ib_post_receive(priv, i)) { 185 ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i); 186 return -EIO; 187 } 188 } 189 190 return 0; 191 } 192 193 static void 194 ipoib_ib_handle_rx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc) 195 { 196 struct ipoib_rx_buf saverx; 197 unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV; 198 struct ifnet *dev = priv->dev; 199 struct ipoib_header *eh; 200 struct mbuf *mb; 201 202 ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n", 203 wr_id, wc->status); 204 205 if (unlikely(wr_id >= ipoib_recvq_size)) { 206 ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n", 207 wr_id, ipoib_recvq_size); 208 return; 209 } 210 211 mb = priv->rx_ring[wr_id].mb; 212 213 if (unlikely(wc->status != IB_WC_SUCCESS)) { 214 if (wc->status != IB_WC_WR_FLUSH_ERR) { 215 ipoib_warn(priv, "failed recv event " 216 "(status=%d, wrid=%d vend_err %x)\n", 217 wc->status, wr_id, wc->vendor_err); 218 goto repost; 219 } 220 if (mb) { 221 ipoib_dma_unmap_rx(priv, &priv->rx_ring[wr_id]); 222 m_freem(mb); 223 priv->rx_ring[wr_id].mb = NULL; 224 } 225 return; 226 } 227 228 /* 229 * Drop packets that this interface sent, ie multicast packets 230 * that the HCA has replicated. 231 */ 232 if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num) 233 goto repost; 234 235 memcpy(&saverx, &priv->rx_ring[wr_id], sizeof(saverx)); 236 /* 237 * If we can't allocate a new RX buffer, dump 238 * this packet and reuse the old buffer. 239 */ 240 if (unlikely(!ipoib_alloc_rx_mb(priv, wr_id))) { 241 memcpy(&priv->rx_ring[wr_id], &saverx, sizeof(saverx)); 242 if_inc_counter(dev, IFCOUNTER_IQDROPS, 1); 243 goto repost; 244 } 245 246 ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", 247 wc->byte_len, wc->slid); 248 249 ipoib_dma_unmap_rx(priv, &saverx); 250 ipoib_dma_mb(priv, mb, wc->byte_len); 251 252 if_inc_counter(dev, IFCOUNTER_IPACKETS, 1); 253 if_inc_counter(dev, IFCOUNTER_IBYTES, mb->m_pkthdr.len); 254 mb->m_pkthdr.rcvif = dev; 255 m_adj(mb, sizeof(struct ib_grh) - INFINIBAND_ALEN); 256 eh = mtod(mb, struct ipoib_header *); 257 bzero(eh->hwaddr, 4); /* Zero the queue pair, only dgid is in grh */ 258 259 if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->csum_ok)) 260 mb->m_pkthdr.csum_flags = CSUM_IP_CHECKED | CSUM_IP_VALID; 261 262 dev->if_input(dev, mb); 263 264 repost: 265 if (unlikely(ipoib_ib_post_receive(priv, wr_id))) 266 ipoib_warn(priv, "ipoib_ib_post_receive failed " 267 "for buf %d\n", wr_id); 268 } 269 270 int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req, int max) 271 { 272 struct mbuf *mb = tx_req->mb; 273 u64 *mapping = tx_req->mapping; 274 struct mbuf *m, *p; 275 int error; 276 int i; 277 278 for (m = mb, p = NULL, i = 0; m != NULL; p = m, m = m->m_next, i++) { 279 if (m->m_len != 0) 280 continue; 281 if (p == NULL) 282 panic("ipoib_dma_map_tx: First mbuf empty\n"); 283 p->m_next = m_free(m); 284 m = p; 285 i--; 286 } 287 i--; 288 if (i >= max) { 289 tx_req->mb = mb = m_defrag(mb, M_NOWAIT); 290 if (mb == NULL) 291 return -EIO; 292 for (m = mb, i = 0; m != NULL; m = m->m_next, i++); 293 if (i >= max) 294 return -EIO; 295 } 296 error = 0; 297 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) { 298 mapping[i] = ib_dma_map_single(ca, mtod(m, void *), 299 m->m_len, DMA_TO_DEVICE); 300 if (unlikely(ib_dma_mapping_error(ca, mapping[i]))) { 301 error = -EIO; 302 break; 303 } 304 } 305 if (error) { 306 int end; 307 308 end = i; 309 for (m = mb, i = 0; i < end; m = m->m_next, i++) 310 ib_dma_unmap_single(ca, mapping[i], m->m_len, 311 DMA_TO_DEVICE); 312 } 313 return error; 314 } 315 316 void ipoib_dma_unmap_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req) 317 { 318 struct mbuf *mb = tx_req->mb; 319 u64 *mapping = tx_req->mapping; 320 struct mbuf *m; 321 int i; 322 323 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) 324 ib_dma_unmap_single(ca, mapping[i], m->m_len, DMA_TO_DEVICE); 325 } 326 327 static void ipoib_ib_handle_tx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc) 328 { 329 struct ifnet *dev = priv->dev; 330 unsigned int wr_id = wc->wr_id; 331 struct ipoib_tx_buf *tx_req; 332 333 ipoib_dbg_data(priv, "send completion: id %d, status: %d\n", 334 wr_id, wc->status); 335 336 if (unlikely(wr_id >= ipoib_sendq_size)) { 337 ipoib_warn(priv, "send completion event with wrid %d (> %d)\n", 338 wr_id, ipoib_sendq_size); 339 return; 340 } 341 342 tx_req = &priv->tx_ring[wr_id]; 343 344 ipoib_dma_unmap_tx(priv->ca, tx_req); 345 346 if_inc_counter(dev, IFCOUNTER_OPACKETS, 1); 347 348 m_freem(tx_req->mb); 349 350 ++priv->tx_tail; 351 if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && 352 (dev->if_drv_flags & IFF_DRV_OACTIVE) && 353 test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 354 dev->if_drv_flags &= ~IFF_DRV_OACTIVE; 355 356 if (wc->status != IB_WC_SUCCESS && 357 wc->status != IB_WC_WR_FLUSH_ERR) 358 ipoib_warn(priv, "failed send event " 359 "(status=%d, wrid=%d vend_err %x)\n", 360 wc->status, wr_id, wc->vendor_err); 361 } 362 363 int 364 ipoib_poll_tx(struct ipoib_dev_priv *priv) 365 { 366 int n, i; 367 368 n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc); 369 for (i = 0; i < n; ++i) { 370 struct ib_wc *wc = priv->send_wc + i; 371 if (wc->wr_id & IPOIB_OP_CM) 372 ipoib_cm_handle_tx_wc(priv, wc); 373 else 374 ipoib_ib_handle_tx_wc(priv, wc); 375 } 376 377 return n == MAX_SEND_CQE; 378 } 379 380 static void 381 ipoib_poll(struct ipoib_dev_priv *priv) 382 { 383 int n, i; 384 385 poll_more: 386 spin_lock(&priv->drain_lock); 387 for (;;) { 388 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); 389 390 for (i = 0; i < n; i++) { 391 struct ib_wc *wc = priv->ibwc + i; 392 393 if ((wc->wr_id & IPOIB_OP_RECV) == 0) 394 panic("ipoib_poll: Bad wr_id 0x%jX\n", 395 (intmax_t)wc->wr_id); 396 if (wc->wr_id & IPOIB_OP_CM) 397 ipoib_cm_handle_rx_wc(priv, wc); 398 else 399 ipoib_ib_handle_rx_wc(priv, wc); 400 } 401 402 if (n != IPOIB_NUM_WC) 403 break; 404 } 405 spin_unlock(&priv->drain_lock); 406 407 if (ib_req_notify_cq(priv->recv_cq, 408 IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS)) 409 goto poll_more; 410 } 411 412 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) 413 { 414 struct ipoib_dev_priv *priv = dev_ptr; 415 416 ipoib_poll(priv); 417 } 418 419 static void drain_tx_cq(struct ipoib_dev_priv *priv) 420 { 421 struct ifnet *dev = priv->dev; 422 423 spin_lock(&priv->lock); 424 while (ipoib_poll_tx(priv)) 425 ; /* nothing */ 426 427 if (dev->if_drv_flags & IFF_DRV_OACTIVE) 428 mod_timer(&priv->poll_timer, jiffies + 1); 429 430 spin_unlock(&priv->lock); 431 } 432 433 void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr) 434 { 435 struct ipoib_dev_priv *priv = dev_ptr; 436 437 mod_timer(&priv->poll_timer, jiffies); 438 } 439 440 static inline int 441 post_send(struct ipoib_dev_priv *priv, unsigned int wr_id, 442 struct ib_ah *address, u32 qpn, struct ipoib_tx_buf *tx_req, void *head, 443 int hlen) 444 { 445 struct ib_send_wr *bad_wr; 446 struct mbuf *mb = tx_req->mb; 447 u64 *mapping = tx_req->mapping; 448 struct mbuf *m; 449 int i; 450 451 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) { 452 priv->tx_sge[i].addr = mapping[i]; 453 priv->tx_sge[i].length = m->m_len; 454 } 455 priv->tx_wr.num_sge = i; 456 priv->tx_wr.wr_id = wr_id; 457 priv->tx_wr.wr.ud.remote_qpn = qpn; 458 priv->tx_wr.wr.ud.ah = address; 459 460 461 if (head) { 462 priv->tx_wr.wr.ud.mss = 0; /* XXX mb_shinfo(mb)->gso_size; */ 463 priv->tx_wr.wr.ud.header = head; 464 priv->tx_wr.wr.ud.hlen = hlen; 465 priv->tx_wr.opcode = IB_WR_LSO; 466 } else 467 priv->tx_wr.opcode = IB_WR_SEND; 468 469 return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr); 470 } 471 472 void 473 ipoib_send(struct ipoib_dev_priv *priv, struct mbuf *mb, 474 struct ipoib_ah *address, u32 qpn) 475 { 476 struct ifnet *dev = priv->dev; 477 struct ipoib_tx_buf *tx_req; 478 int hlen; 479 void *phead; 480 481 if (unlikely(priv->tx_outstanding > MAX_SEND_CQE)) 482 while (ipoib_poll_tx(priv)) 483 ; /* nothing */ 484 485 m_adj(mb, sizeof (struct ipoib_pseudoheader)); 486 if (0 /* XXX segment offload mb_is_gso(mb) */) { 487 /* XXX hlen = mb_transport_offset(mb) + tcp_hdrlen(mb); */ 488 phead = mtod(mb, void *); 489 if (mb->m_len < hlen) { 490 ipoib_warn(priv, "linear data too small\n"); 491 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 492 m_freem(mb); 493 return; 494 } 495 m_adj(mb, hlen); 496 } else { 497 if (unlikely(mb->m_pkthdr.len - IPOIB_ENCAP_LEN > priv->mcast_mtu)) { 498 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", 499 mb->m_pkthdr.len, priv->mcast_mtu); 500 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 501 ipoib_cm_mb_too_long(priv, mb, priv->mcast_mtu); 502 return; 503 } 504 phead = NULL; 505 hlen = 0; 506 } 507 508 ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n", 509 mb->m_pkthdr.len, address, qpn); 510 511 /* 512 * We put the mb into the tx_ring _before_ we call post_send() 513 * because it's entirely possible that the completion handler will 514 * run before we execute anything after the post_send(). That 515 * means we have to make sure everything is properly recorded and 516 * our state is consistent before we call post_send(). 517 */ 518 tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)]; 519 tx_req->mb = mb; 520 if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req, IPOIB_UD_TX_SG))) { 521 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 522 if (tx_req->mb) 523 m_freem(tx_req->mb); 524 return; 525 } 526 527 if (mb->m_pkthdr.csum_flags & (CSUM_IP|CSUM_TCP|CSUM_UDP)) 528 priv->tx_wr.send_flags |= IB_SEND_IP_CSUM; 529 else 530 priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM; 531 532 if (++priv->tx_outstanding == ipoib_sendq_size) { 533 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); 534 if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP)) 535 ipoib_warn(priv, "request notify on send CQ failed\n"); 536 dev->if_drv_flags |= IFF_DRV_OACTIVE; 537 } 538 539 if (unlikely(post_send(priv, 540 priv->tx_head & (ipoib_sendq_size - 1), address->ah, qpn, 541 tx_req, phead, hlen))) { 542 ipoib_warn(priv, "post_send failed\n"); 543 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 544 --priv->tx_outstanding; 545 ipoib_dma_unmap_tx(priv->ca, tx_req); 546 m_freem(mb); 547 if (dev->if_drv_flags & IFF_DRV_OACTIVE) 548 dev->if_drv_flags &= ~IFF_DRV_OACTIVE; 549 } else { 550 address->last_send = priv->tx_head; 551 ++priv->tx_head; 552 } 553 } 554 555 static void __ipoib_reap_ah(struct ipoib_dev_priv *priv) 556 { 557 struct ipoib_ah *ah, *tah; 558 LIST_HEAD(remove_list); 559 unsigned long flags; 560 561 spin_lock_irqsave(&priv->lock, flags); 562 563 list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) 564 if ((int) priv->tx_tail - (int) ah->last_send >= 0) { 565 list_del(&ah->list); 566 ib_destroy_ah(ah->ah); 567 kfree(ah); 568 } 569 570 spin_unlock_irqrestore(&priv->lock, flags); 571 } 572 573 void ipoib_reap_ah(struct work_struct *work) 574 { 575 struct ipoib_dev_priv *priv = 576 container_of(work, struct ipoib_dev_priv, ah_reap_task.work); 577 578 __ipoib_reap_ah(priv); 579 580 if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) 581 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, 582 HZ); 583 } 584 585 static void ipoib_ah_dev_cleanup(struct ipoib_dev_priv *priv) 586 { 587 unsigned long begin; 588 589 begin = jiffies; 590 591 while (!list_empty(&priv->dead_ahs)) { 592 __ipoib_reap_ah(priv); 593 594 if (time_after(jiffies, begin + HZ)) { 595 ipoib_warn(priv, "timing out; will leak address handles\n"); 596 break; 597 } 598 599 msleep(1); 600 } 601 } 602 603 static void ipoib_ib_tx_timer_func(unsigned long ctx) 604 { 605 drain_tx_cq((struct ipoib_dev_priv *)ctx); 606 } 607 608 int ipoib_ib_dev_open(struct ipoib_dev_priv *priv) 609 { 610 int ret; 611 612 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) { 613 ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey); 614 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 615 return -1; 616 } 617 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 618 619 ret = ipoib_init_qp(priv); 620 if (ret) { 621 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); 622 return -1; 623 } 624 625 ret = ipoib_ib_post_receives(priv); 626 if (ret) { 627 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); 628 ipoib_ib_dev_stop(priv, 1); 629 return -1; 630 } 631 632 ret = ipoib_cm_dev_open(priv); 633 if (ret) { 634 ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret); 635 ipoib_ib_dev_stop(priv, 1); 636 return -1; 637 } 638 639 clear_bit(IPOIB_STOP_REAPER, &priv->flags); 640 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ); 641 642 return 0; 643 } 644 645 static void ipoib_pkey_dev_check_presence(struct ipoib_dev_priv *priv) 646 { 647 u16 pkey_index = 0; 648 649 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) 650 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 651 else 652 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 653 } 654 655 int ipoib_ib_dev_up(struct ipoib_dev_priv *priv) 656 { 657 658 ipoib_pkey_dev_check_presence(priv); 659 660 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 661 ipoib_dbg(priv, "PKEY is not assigned.\n"); 662 return 0; 663 } 664 665 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 666 667 return ipoib_mcast_start_thread(priv); 668 } 669 670 int ipoib_ib_dev_down(struct ipoib_dev_priv *priv, int flush) 671 { 672 673 ipoib_dbg(priv, "downing ib_dev\n"); 674 675 clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 676 if_link_state_change(priv->dev, LINK_STATE_DOWN); 677 678 /* Shutdown the P_Key thread if still active */ 679 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 680 mutex_lock(&pkey_mutex); 681 set_bit(IPOIB_PKEY_STOP, &priv->flags); 682 cancel_delayed_work(&priv->pkey_poll_task); 683 mutex_unlock(&pkey_mutex); 684 if (flush) 685 flush_workqueue(ipoib_workqueue); 686 } 687 688 ipoib_mcast_stop_thread(priv, flush); 689 ipoib_mcast_dev_flush(priv); 690 691 ipoib_flush_paths(priv); 692 693 return 0; 694 } 695 696 static int recvs_pending(struct ipoib_dev_priv *priv) 697 { 698 int pending = 0; 699 int i; 700 701 for (i = 0; i < ipoib_recvq_size; ++i) 702 if (priv->rx_ring[i].mb) 703 ++pending; 704 705 return pending; 706 } 707 708 void ipoib_drain_cq(struct ipoib_dev_priv *priv) 709 { 710 int i, n; 711 712 spin_lock(&priv->drain_lock); 713 do { 714 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); 715 for (i = 0; i < n; ++i) { 716 /* 717 * Convert any successful completions to flush 718 * errors to avoid passing packets up the 719 * stack after bringing the device down. 720 */ 721 if (priv->ibwc[i].status == IB_WC_SUCCESS) 722 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; 723 724 if ((priv->ibwc[i].wr_id & IPOIB_OP_RECV) == 0) 725 panic("ipoib_drain_cq: Bad wrid 0x%jX\n", 726 (intmax_t)priv->ibwc[i].wr_id); 727 if (priv->ibwc[i].wr_id & IPOIB_OP_CM) 728 ipoib_cm_handle_rx_wc(priv, priv->ibwc + i); 729 else 730 ipoib_ib_handle_rx_wc(priv, priv->ibwc + i); 731 } 732 } while (n == IPOIB_NUM_WC); 733 spin_unlock(&priv->drain_lock); 734 735 spin_lock(&priv->lock); 736 while (ipoib_poll_tx(priv)) 737 ; /* nothing */ 738 739 spin_unlock(&priv->lock); 740 } 741 742 int ipoib_ib_dev_stop(struct ipoib_dev_priv *priv, int flush) 743 { 744 struct ib_qp_attr qp_attr; 745 unsigned long begin; 746 struct ipoib_tx_buf *tx_req; 747 int i; 748 749 ipoib_cm_dev_stop(priv); 750 751 /* 752 * Move our QP to the error state and then reinitialize in 753 * when all work requests have completed or have been flushed. 754 */ 755 qp_attr.qp_state = IB_QPS_ERR; 756 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 757 ipoib_warn(priv, "Failed to modify QP to ERROR state\n"); 758 759 /* Wait for all sends and receives to complete */ 760 begin = jiffies; 761 762 while (priv->tx_head != priv->tx_tail || recvs_pending(priv)) { 763 if (time_after(jiffies, begin + 5 * HZ)) { 764 ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", 765 priv->tx_head - priv->tx_tail, recvs_pending(priv)); 766 767 /* 768 * assume the HW is wedged and just free up 769 * all our pending work requests. 770 */ 771 while ((int) priv->tx_tail - (int) priv->tx_head < 0) { 772 tx_req = &priv->tx_ring[priv->tx_tail & 773 (ipoib_sendq_size - 1)]; 774 ipoib_dma_unmap_tx(priv->ca, tx_req); 775 m_freem(tx_req->mb); 776 ++priv->tx_tail; 777 --priv->tx_outstanding; 778 } 779 780 for (i = 0; i < ipoib_recvq_size; ++i) { 781 struct ipoib_rx_buf *rx_req; 782 783 rx_req = &priv->rx_ring[i]; 784 if (!rx_req->mb) 785 continue; 786 ipoib_dma_unmap_rx(priv, &priv->rx_ring[i]); 787 m_freem(rx_req->mb); 788 rx_req->mb = NULL; 789 } 790 791 goto timeout; 792 } 793 794 ipoib_drain_cq(priv); 795 796 msleep(1); 797 } 798 799 ipoib_dbg(priv, "All sends and receives done.\n"); 800 801 timeout: 802 del_timer_sync(&priv->poll_timer); 803 qp_attr.qp_state = IB_QPS_RESET; 804 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 805 ipoib_warn(priv, "Failed to modify QP to RESET state\n"); 806 807 /* Wait for all AHs to be reaped */ 808 set_bit(IPOIB_STOP_REAPER, &priv->flags); 809 cancel_delayed_work(&priv->ah_reap_task); 810 if (flush) 811 flush_workqueue(ipoib_workqueue); 812 813 ipoib_ah_dev_cleanup(priv); 814 815 ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP); 816 817 return 0; 818 } 819 820 int ipoib_ib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port) 821 { 822 struct ifnet *dev = priv->dev; 823 824 priv->ca = ca; 825 priv->port = port; 826 priv->qp = NULL; 827 828 if (ipoib_transport_dev_init(priv, ca)) { 829 printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); 830 return -ENODEV; 831 } 832 833 setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func, 834 (unsigned long) priv); 835 836 if (dev->if_flags & IFF_UP) { 837 if (ipoib_ib_dev_open(priv)) { 838 ipoib_transport_dev_cleanup(priv); 839 return -ENODEV; 840 } 841 } 842 843 return 0; 844 } 845 846 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, 847 enum ipoib_flush_level level) 848 { 849 struct ipoib_dev_priv *cpriv; 850 u16 new_index; 851 852 mutex_lock(&priv->vlan_mutex); 853 854 /* 855 * Flush any child interfaces too -- they might be up even if 856 * the parent is down. 857 */ 858 list_for_each_entry(cpriv, &priv->child_intfs, list) 859 __ipoib_ib_dev_flush(cpriv, level); 860 861 mutex_unlock(&priv->vlan_mutex); 862 863 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) { 864 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); 865 return; 866 } 867 868 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 869 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); 870 return; 871 } 872 873 if (level == IPOIB_FLUSH_HEAVY) { 874 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) { 875 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 876 ipoib_ib_dev_down(priv, 0); 877 ipoib_ib_dev_stop(priv, 0); 878 if (ipoib_pkey_dev_delay_open(priv)) 879 return; 880 } 881 882 /* restart QP only if P_Key index is changed */ 883 if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) && 884 new_index == priv->pkey_index) { 885 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); 886 return; 887 } 888 priv->pkey_index = new_index; 889 } 890 891 if (level == IPOIB_FLUSH_LIGHT) { 892 ipoib_mark_paths_invalid(priv); 893 ipoib_mcast_dev_flush(priv); 894 } 895 896 if (level >= IPOIB_FLUSH_NORMAL) 897 ipoib_ib_dev_down(priv, 0); 898 899 if (level == IPOIB_FLUSH_HEAVY) { 900 ipoib_ib_dev_stop(priv, 0); 901 ipoib_ib_dev_open(priv); 902 } 903 904 /* 905 * The device could have been brought down between the start and when 906 * we get here, don't bring it back up if it's not configured up 907 */ 908 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 909 if (level >= IPOIB_FLUSH_NORMAL) 910 ipoib_ib_dev_up(priv); 911 ipoib_mcast_restart_task(&priv->restart_task); 912 } 913 } 914 915 void ipoib_ib_dev_flush_light(struct work_struct *work) 916 { 917 struct ipoib_dev_priv *priv = 918 container_of(work, struct ipoib_dev_priv, flush_light); 919 920 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT); 921 } 922 923 void ipoib_ib_dev_flush_normal(struct work_struct *work) 924 { 925 struct ipoib_dev_priv *priv = 926 container_of(work, struct ipoib_dev_priv, flush_normal); 927 928 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL); 929 } 930 931 void ipoib_ib_dev_flush_heavy(struct work_struct *work) 932 { 933 struct ipoib_dev_priv *priv = 934 container_of(work, struct ipoib_dev_priv, flush_heavy); 935 936 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY); 937 } 938 939 void ipoib_ib_dev_cleanup(struct ipoib_dev_priv *priv) 940 { 941 942 ipoib_dbg(priv, "cleaning up ib_dev\n"); 943 944 ipoib_mcast_stop_thread(priv, 1); 945 ipoib_mcast_dev_flush(priv); 946 947 ipoib_ah_dev_cleanup(priv); 948 ipoib_transport_dev_cleanup(priv); 949 } 950 951 /* 952 * Delayed P_Key Assigment Interim Support 953 * 954 * The following is initial implementation of delayed P_Key assigment 955 * mechanism. It is using the same approach implemented for the multicast 956 * group join. The single goal of this implementation is to quickly address 957 * Bug #2507. This implementation will probably be removed when the P_Key 958 * change async notification is available. 959 */ 960 961 void ipoib_pkey_poll(struct work_struct *work) 962 { 963 struct ipoib_dev_priv *priv = 964 container_of(work, struct ipoib_dev_priv, pkey_poll_task.work); 965 966 ipoib_pkey_dev_check_presence(priv); 967 968 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) 969 ipoib_open(priv); 970 else { 971 mutex_lock(&pkey_mutex); 972 if (!test_bit(IPOIB_PKEY_STOP, &priv->flags)) 973 queue_delayed_work(ipoib_workqueue, 974 &priv->pkey_poll_task, 975 HZ); 976 mutex_unlock(&pkey_mutex); 977 } 978 } 979 980 int ipoib_pkey_dev_delay_open(struct ipoib_dev_priv *priv) 981 { 982 983 /* Look for the interface pkey value in the IB Port P_Key table and */ 984 /* set the interface pkey assigment flag */ 985 ipoib_pkey_dev_check_presence(priv); 986 987 /* P_Key value not assigned yet - start polling */ 988 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 989 mutex_lock(&pkey_mutex); 990 clear_bit(IPOIB_PKEY_STOP, &priv->flags); 991 queue_delayed_work(ipoib_workqueue, 992 &priv->pkey_poll_task, 993 HZ); 994 mutex_unlock(&pkey_mutex); 995 return 1; 996 } 997 998 return 0; 999 } 1000