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 for (i = 0; i < n; i++) { 390 struct ib_wc *wc = priv->ibwc + i; 391 392 if ((wc->wr_id & IPOIB_OP_RECV) == 0) 393 panic("ipoib_poll: Bad wr_id 0x%jX\n", 394 (intmax_t)wc->wr_id); 395 if (wc->wr_id & IPOIB_OP_CM) 396 ipoib_cm_handle_rx_wc(priv, wc); 397 else 398 ipoib_ib_handle_rx_wc(priv, wc); 399 } 400 401 if (n != IPOIB_NUM_WC) 402 break; 403 } 404 spin_unlock(&priv->drain_lock); 405 406 if (ib_req_notify_cq(priv->recv_cq, 407 IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS)) 408 goto poll_more; 409 } 410 411 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) 412 { 413 struct ipoib_dev_priv *priv = dev_ptr; 414 415 ipoib_poll(priv); 416 } 417 418 static void drain_tx_cq(struct ipoib_dev_priv *priv) 419 { 420 struct ifnet *dev = priv->dev; 421 422 spin_lock(&priv->lock); 423 while (ipoib_poll_tx(priv)) 424 ; /* nothing */ 425 426 if (dev->if_drv_flags & IFF_DRV_OACTIVE) 427 mod_timer(&priv->poll_timer, jiffies + 1); 428 429 spin_unlock(&priv->lock); 430 } 431 432 void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr) 433 { 434 struct ipoib_dev_priv *priv = dev_ptr; 435 436 mod_timer(&priv->poll_timer, jiffies); 437 } 438 439 static inline int 440 post_send(struct ipoib_dev_priv *priv, unsigned int wr_id, 441 struct ib_ah *address, u32 qpn, struct ipoib_tx_buf *tx_req, void *head, 442 int hlen) 443 { 444 struct ib_send_wr *bad_wr; 445 struct mbuf *mb = tx_req->mb; 446 u64 *mapping = tx_req->mapping; 447 struct mbuf *m; 448 int i; 449 450 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) { 451 priv->tx_sge[i].addr = mapping[i]; 452 priv->tx_sge[i].length = m->m_len; 453 } 454 priv->tx_wr.num_sge = i; 455 priv->tx_wr.wr_id = wr_id; 456 priv->tx_wr.wr.ud.remote_qpn = qpn; 457 priv->tx_wr.wr.ud.ah = address; 458 459 460 if (head) { 461 priv->tx_wr.wr.ud.mss = 0; /* XXX mb_shinfo(mb)->gso_size; */ 462 priv->tx_wr.wr.ud.header = head; 463 priv->tx_wr.wr.ud.hlen = hlen; 464 priv->tx_wr.opcode = IB_WR_LSO; 465 } else 466 priv->tx_wr.opcode = IB_WR_SEND; 467 468 return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr); 469 } 470 471 void 472 ipoib_send(struct ipoib_dev_priv *priv, struct mbuf *mb, 473 struct ipoib_ah *address, u32 qpn) 474 { 475 struct ifnet *dev = priv->dev; 476 struct ipoib_tx_buf *tx_req; 477 int hlen; 478 void *phead; 479 480 if (unlikely(priv->tx_outstanding > MAX_SEND_CQE)) 481 while (ipoib_poll_tx(priv)) 482 ; /* nothing */ 483 484 m_adj(mb, sizeof (struct ipoib_pseudoheader)); 485 if (0 /* XXX segment offload mb_is_gso(mb) */) { 486 /* XXX hlen = mb_transport_offset(mb) + tcp_hdrlen(mb); */ 487 phead = mtod(mb, void *); 488 if (mb->m_len < hlen) { 489 ipoib_warn(priv, "linear data too small\n"); 490 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 491 m_freem(mb); 492 return; 493 } 494 m_adj(mb, hlen); 495 } else { 496 if (unlikely(mb->m_pkthdr.len - IPOIB_ENCAP_LEN > priv->mcast_mtu)) { 497 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", 498 mb->m_pkthdr.len, priv->mcast_mtu); 499 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 500 ipoib_cm_mb_too_long(priv, mb, priv->mcast_mtu); 501 return; 502 } 503 phead = NULL; 504 hlen = 0; 505 } 506 507 ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n", 508 mb->m_pkthdr.len, address, qpn); 509 510 /* 511 * We put the mb into the tx_ring _before_ we call post_send() 512 * because it's entirely possible that the completion handler will 513 * run before we execute anything after the post_send(). That 514 * means we have to make sure everything is properly recorded and 515 * our state is consistent before we call post_send(). 516 */ 517 tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)]; 518 tx_req->mb = mb; 519 if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req, IPOIB_UD_TX_SG))) { 520 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 521 if (tx_req->mb) 522 m_freem(tx_req->mb); 523 return; 524 } 525 526 if (mb->m_pkthdr.csum_flags & (CSUM_IP|CSUM_TCP|CSUM_UDP)) 527 priv->tx_wr.send_flags |= IB_SEND_IP_CSUM; 528 else 529 priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM; 530 531 if (++priv->tx_outstanding == ipoib_sendq_size) { 532 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); 533 if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP)) 534 ipoib_warn(priv, "request notify on send CQ failed\n"); 535 dev->if_drv_flags |= IFF_DRV_OACTIVE; 536 } 537 538 if (unlikely(post_send(priv, 539 priv->tx_head & (ipoib_sendq_size - 1), address->ah, qpn, 540 tx_req, phead, hlen))) { 541 ipoib_warn(priv, "post_send failed\n"); 542 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 543 --priv->tx_outstanding; 544 ipoib_dma_unmap_tx(priv->ca, tx_req); 545 m_freem(mb); 546 if (dev->if_drv_flags & IFF_DRV_OACTIVE) 547 dev->if_drv_flags &= ~IFF_DRV_OACTIVE; 548 } else { 549 address->last_send = priv->tx_head; 550 ++priv->tx_head; 551 } 552 } 553 554 static void __ipoib_reap_ah(struct ipoib_dev_priv *priv) 555 { 556 struct ipoib_ah *ah, *tah; 557 LIST_HEAD(remove_list); 558 unsigned long flags; 559 560 spin_lock_irqsave(&priv->lock, flags); 561 562 list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) 563 if ((int) priv->tx_tail - (int) ah->last_send >= 0) { 564 list_del(&ah->list); 565 ib_destroy_ah(ah->ah); 566 kfree(ah); 567 } 568 569 spin_unlock_irqrestore(&priv->lock, flags); 570 } 571 572 void ipoib_reap_ah(struct work_struct *work) 573 { 574 struct ipoib_dev_priv *priv = 575 container_of(work, struct ipoib_dev_priv, ah_reap_task.work); 576 577 __ipoib_reap_ah(priv); 578 579 if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) 580 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, 581 HZ); 582 } 583 584 static void ipoib_ah_dev_cleanup(struct ipoib_dev_priv *priv) 585 { 586 unsigned long begin; 587 588 begin = jiffies; 589 590 while (!list_empty(&priv->dead_ahs)) { 591 __ipoib_reap_ah(priv); 592 593 if (time_after(jiffies, begin + HZ)) { 594 ipoib_warn(priv, "timing out; will leak address handles\n"); 595 break; 596 } 597 598 msleep(1); 599 } 600 } 601 602 static void ipoib_ib_tx_timer_func(unsigned long ctx) 603 { 604 drain_tx_cq((struct ipoib_dev_priv *)ctx); 605 } 606 607 int ipoib_ib_dev_open(struct ipoib_dev_priv *priv) 608 { 609 int ret; 610 611 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) { 612 ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey); 613 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 614 return -1; 615 } 616 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 617 618 ret = ipoib_init_qp(priv); 619 if (ret) { 620 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); 621 return -1; 622 } 623 624 ret = ipoib_ib_post_receives(priv); 625 if (ret) { 626 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); 627 ipoib_ib_dev_stop(priv, 1); 628 return -1; 629 } 630 631 ret = ipoib_cm_dev_open(priv); 632 if (ret) { 633 ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret); 634 ipoib_ib_dev_stop(priv, 1); 635 return -1; 636 } 637 638 clear_bit(IPOIB_STOP_REAPER, &priv->flags); 639 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ); 640 641 return 0; 642 } 643 644 static void ipoib_pkey_dev_check_presence(struct ipoib_dev_priv *priv) 645 { 646 u16 pkey_index = 0; 647 648 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) 649 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 650 else 651 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 652 } 653 654 int ipoib_ib_dev_up(struct ipoib_dev_priv *priv) 655 { 656 657 ipoib_pkey_dev_check_presence(priv); 658 659 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 660 ipoib_dbg(priv, "PKEY is not assigned.\n"); 661 return 0; 662 } 663 664 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 665 666 return ipoib_mcast_start_thread(priv); 667 } 668 669 int ipoib_ib_dev_down(struct ipoib_dev_priv *priv, int flush) 670 { 671 672 ipoib_dbg(priv, "downing ib_dev\n"); 673 674 clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 675 if_link_state_change(priv->dev, LINK_STATE_DOWN); 676 677 /* Shutdown the P_Key thread if still active */ 678 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 679 mutex_lock(&pkey_mutex); 680 set_bit(IPOIB_PKEY_STOP, &priv->flags); 681 cancel_delayed_work(&priv->pkey_poll_task); 682 mutex_unlock(&pkey_mutex); 683 if (flush) 684 flush_workqueue(ipoib_workqueue); 685 } 686 687 ipoib_mcast_stop_thread(priv, flush); 688 ipoib_mcast_dev_flush(priv); 689 690 ipoib_flush_paths(priv); 691 692 return 0; 693 } 694 695 static int recvs_pending(struct ipoib_dev_priv *priv) 696 { 697 int pending = 0; 698 int i; 699 700 for (i = 0; i < ipoib_recvq_size; ++i) 701 if (priv->rx_ring[i].mb) 702 ++pending; 703 704 return pending; 705 } 706 707 void ipoib_drain_cq(struct ipoib_dev_priv *priv) 708 { 709 int i, n; 710 711 spin_lock(&priv->drain_lock); 712 do { 713 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); 714 for (i = 0; i < n; ++i) { 715 /* 716 * Convert any successful completions to flush 717 * errors to avoid passing packets up the 718 * stack after bringing the device down. 719 */ 720 if (priv->ibwc[i].status == IB_WC_SUCCESS) 721 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; 722 723 if ((priv->ibwc[i].wr_id & IPOIB_OP_RECV) == 0) 724 panic("ipoib_drain_cq: Bad wrid 0x%jX\n", 725 (intmax_t)priv->ibwc[i].wr_id); 726 if (priv->ibwc[i].wr_id & IPOIB_OP_CM) 727 ipoib_cm_handle_rx_wc(priv, priv->ibwc + i); 728 else 729 ipoib_ib_handle_rx_wc(priv, priv->ibwc + i); 730 } 731 } while (n == IPOIB_NUM_WC); 732 spin_unlock(&priv->drain_lock); 733 734 spin_lock(&priv->lock); 735 while (ipoib_poll_tx(priv)) 736 ; /* nothing */ 737 738 spin_unlock(&priv->lock); 739 } 740 741 int ipoib_ib_dev_stop(struct ipoib_dev_priv *priv, int flush) 742 { 743 struct ib_qp_attr qp_attr; 744 unsigned long begin; 745 struct ipoib_tx_buf *tx_req; 746 int i; 747 748 ipoib_cm_dev_stop(priv); 749 750 /* 751 * Move our QP to the error state and then reinitialize in 752 * when all work requests have completed or have been flushed. 753 */ 754 qp_attr.qp_state = IB_QPS_ERR; 755 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 756 ipoib_warn(priv, "Failed to modify QP to ERROR state\n"); 757 758 /* Wait for all sends and receives to complete */ 759 begin = jiffies; 760 761 while (priv->tx_head != priv->tx_tail || recvs_pending(priv)) { 762 if (time_after(jiffies, begin + 5 * HZ)) { 763 ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", 764 priv->tx_head - priv->tx_tail, recvs_pending(priv)); 765 766 /* 767 * assume the HW is wedged and just free up 768 * all our pending work requests. 769 */ 770 while ((int) priv->tx_tail - (int) priv->tx_head < 0) { 771 tx_req = &priv->tx_ring[priv->tx_tail & 772 (ipoib_sendq_size - 1)]; 773 ipoib_dma_unmap_tx(priv->ca, tx_req); 774 m_freem(tx_req->mb); 775 ++priv->tx_tail; 776 --priv->tx_outstanding; 777 } 778 779 for (i = 0; i < ipoib_recvq_size; ++i) { 780 struct ipoib_rx_buf *rx_req; 781 782 rx_req = &priv->rx_ring[i]; 783 if (!rx_req->mb) 784 continue; 785 ipoib_dma_unmap_rx(priv, &priv->rx_ring[i]); 786 m_freem(rx_req->mb); 787 rx_req->mb = NULL; 788 } 789 790 goto timeout; 791 } 792 793 ipoib_drain_cq(priv); 794 795 msleep(1); 796 } 797 798 ipoib_dbg(priv, "All sends and receives done.\n"); 799 800 timeout: 801 del_timer_sync(&priv->poll_timer); 802 qp_attr.qp_state = IB_QPS_RESET; 803 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 804 ipoib_warn(priv, "Failed to modify QP to RESET state\n"); 805 806 /* Wait for all AHs to be reaped */ 807 set_bit(IPOIB_STOP_REAPER, &priv->flags); 808 cancel_delayed_work(&priv->ah_reap_task); 809 if (flush) 810 flush_workqueue(ipoib_workqueue); 811 812 ipoib_ah_dev_cleanup(priv); 813 814 ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP); 815 816 return 0; 817 } 818 819 int ipoib_ib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port) 820 { 821 struct ifnet *dev = priv->dev; 822 823 priv->ca = ca; 824 priv->port = port; 825 priv->qp = NULL; 826 827 if (ipoib_transport_dev_init(priv, ca)) { 828 printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); 829 return -ENODEV; 830 } 831 832 setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func, 833 (unsigned long) priv); 834 835 if (dev->if_flags & IFF_UP) { 836 if (ipoib_ib_dev_open(priv)) { 837 ipoib_transport_dev_cleanup(priv); 838 return -ENODEV; 839 } 840 } 841 842 return 0; 843 } 844 845 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, 846 enum ipoib_flush_level level) 847 { 848 struct ipoib_dev_priv *cpriv; 849 u16 new_index; 850 851 mutex_lock(&priv->vlan_mutex); 852 853 /* 854 * Flush any child interfaces too -- they might be up even if 855 * the parent is down. 856 */ 857 list_for_each_entry(cpriv, &priv->child_intfs, list) 858 __ipoib_ib_dev_flush(cpriv, level); 859 860 mutex_unlock(&priv->vlan_mutex); 861 862 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) { 863 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); 864 return; 865 } 866 867 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 868 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); 869 return; 870 } 871 872 if (level == IPOIB_FLUSH_HEAVY) { 873 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) { 874 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 875 ipoib_ib_dev_down(priv, 0); 876 ipoib_ib_dev_stop(priv, 0); 877 if (ipoib_pkey_dev_delay_open(priv)) 878 return; 879 } 880 881 /* restart QP only if P_Key index is changed */ 882 if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) && 883 new_index == priv->pkey_index) { 884 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); 885 return; 886 } 887 priv->pkey_index = new_index; 888 } 889 890 if (level == IPOIB_FLUSH_LIGHT) { 891 ipoib_mark_paths_invalid(priv); 892 ipoib_mcast_dev_flush(priv); 893 } 894 895 if (level >= IPOIB_FLUSH_NORMAL) 896 ipoib_ib_dev_down(priv, 0); 897 898 if (level == IPOIB_FLUSH_HEAVY) { 899 ipoib_ib_dev_stop(priv, 0); 900 ipoib_ib_dev_open(priv); 901 } 902 903 /* 904 * The device could have been brought down between the start and when 905 * we get here, don't bring it back up if it's not configured up 906 */ 907 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 908 if (level >= IPOIB_FLUSH_NORMAL) 909 ipoib_ib_dev_up(priv); 910 ipoib_mcast_restart_task(&priv->restart_task); 911 } 912 } 913 914 void ipoib_ib_dev_flush_light(struct work_struct *work) 915 { 916 struct ipoib_dev_priv *priv = 917 container_of(work, struct ipoib_dev_priv, flush_light); 918 919 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT); 920 } 921 922 void ipoib_ib_dev_flush_normal(struct work_struct *work) 923 { 924 struct ipoib_dev_priv *priv = 925 container_of(work, struct ipoib_dev_priv, flush_normal); 926 927 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL); 928 } 929 930 void ipoib_ib_dev_flush_heavy(struct work_struct *work) 931 { 932 struct ipoib_dev_priv *priv = 933 container_of(work, struct ipoib_dev_priv, flush_heavy); 934 935 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY); 936 } 937 938 void ipoib_ib_dev_cleanup(struct ipoib_dev_priv *priv) 939 { 940 941 ipoib_dbg(priv, "cleaning up ib_dev\n"); 942 943 ipoib_mcast_stop_thread(priv, 1); 944 ipoib_mcast_dev_flush(priv); 945 946 ipoib_ah_dev_cleanup(priv); 947 ipoib_transport_dev_cleanup(priv); 948 } 949 950 /* 951 * Delayed P_Key Assigment Interim Support 952 * 953 * The following is initial implementation of delayed P_Key assigment 954 * mechanism. It is using the same approach implemented for the multicast 955 * group join. The single goal of this implementation is to quickly address 956 * Bug #2507. This implementation will probably be removed when the P_Key 957 * change async notification is available. 958 */ 959 960 void ipoib_pkey_poll(struct work_struct *work) 961 { 962 struct ipoib_dev_priv *priv = 963 container_of(work, struct ipoib_dev_priv, pkey_poll_task.work); 964 965 ipoib_pkey_dev_check_presence(priv); 966 967 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) 968 ipoib_open(priv); 969 else { 970 mutex_lock(&pkey_mutex); 971 if (!test_bit(IPOIB_PKEY_STOP, &priv->flags)) 972 queue_delayed_work(ipoib_workqueue, 973 &priv->pkey_poll_task, 974 HZ); 975 mutex_unlock(&pkey_mutex); 976 } 977 } 978 979 int ipoib_pkey_dev_delay_open(struct ipoib_dev_priv *priv) 980 { 981 982 /* Look for the interface pkey value in the IB Port P_Key table and */ 983 /* set the interface pkey assigment flag */ 984 ipoib_pkey_dev_check_presence(priv); 985 986 /* P_Key value not assigned yet - start polling */ 987 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 988 mutex_lock(&pkey_mutex); 989 clear_bit(IPOIB_PKEY_STOP, &priv->flags); 990 queue_delayed_work(ipoib_workqueue, 991 &priv->pkey_poll_task, 992 HZ); 993 mutex_unlock(&pkey_mutex); 994 return 1; 995 } 996 997 return 0; 998 } 999