1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. 5 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 6 * Copyright (c) 2005 Mellanox Technologies. All rights reserved. 7 * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved. 8 * 9 * This software is available to you under a choice of one of two 10 * licenses. You may choose to be licensed under the terms of the GNU 11 * General Public License (GPL) Version 2, available from the file 12 * COPYING in the main directory of this source tree, or the 13 * OpenIB.org BSD license below: 14 * 15 * Redistribution and use in source and binary forms, with or 16 * without modification, are permitted provided that the following 17 * conditions are met: 18 * 19 * - Redistributions of source code must retain the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer. 22 * 23 * - Redistributions in binary form must reproduce the above 24 * copyright notice, this list of conditions and the following 25 * disclaimer in the documentation and/or other materials 26 * provided with the distribution. 27 * 28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 29 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 31 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 32 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 33 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 34 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 35 * SOFTWARE. 36 */ 37 38 #include "ipoib.h" 39 40 #include <rdma/ib_cache.h> 41 42 #include <security/mac/mac_framework.h> 43 44 #include <linux/delay.h> 45 #include <linux/dma-mapping.h> 46 47 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA 48 static int data_debug_level; 49 50 module_param(data_debug_level, int, 0644); 51 MODULE_PARM_DESC(data_debug_level, 52 "Enable data path debug tracing if > 0"); 53 #endif 54 55 static DEFINE_MUTEX(pkey_mutex); 56 57 struct ipoib_ah *ipoib_create_ah(struct ipoib_dev_priv *priv, 58 struct ib_pd *pd, struct ib_ah_attr *attr) 59 { 60 struct ipoib_ah *ah; 61 62 ah = kmalloc(sizeof *ah, GFP_KERNEL); 63 if (!ah) 64 return NULL; 65 66 ah->priv = priv; 67 ah->last_send = 0; 68 kref_init(&ah->ref); 69 70 ah->ah = ib_create_ah(pd, attr); 71 if (IS_ERR(ah->ah)) { 72 kfree(ah); 73 ah = NULL; 74 } else 75 ipoib_dbg(priv, "Created ah %p\n", ah->ah); 76 77 return ah; 78 } 79 80 void ipoib_free_ah(struct kref *kref) 81 { 82 struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref); 83 struct ipoib_dev_priv *priv = ah->priv; 84 85 unsigned long flags; 86 87 spin_lock_irqsave(&priv->lock, flags); 88 list_add_tail(&ah->list, &priv->dead_ahs); 89 spin_unlock_irqrestore(&priv->lock, flags); 90 } 91 92 void 93 ipoib_dma_unmap_rx(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req) 94 { 95 struct mbuf *m; 96 int i; 97 98 for (i = 0, m = rx_req->mb; m != NULL; m = m->m_next, i++) 99 ib_dma_unmap_single(priv->ca, rx_req->mapping[i], m->m_len, 100 DMA_FROM_DEVICE); 101 } 102 103 void 104 ipoib_dma_mb(struct ipoib_dev_priv *priv, struct mbuf *mb, unsigned int length) 105 { 106 107 m_adj(mb, -(mb->m_pkthdr.len - length)); 108 } 109 110 struct mbuf * 111 ipoib_alloc_map_mb(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req, 112 int size) 113 { 114 struct mbuf *mb, *m; 115 int i, j; 116 117 rx_req->mb = NULL; 118 mb = m_getm2(NULL, size, M_NOWAIT, MT_DATA, M_PKTHDR); 119 if (mb == NULL) 120 return (NULL); 121 for (i = 0, m = mb; m != NULL; m = m->m_next, i++) { 122 m->m_len = M_SIZE(m); 123 mb->m_pkthdr.len += m->m_len; 124 rx_req->mapping[i] = ib_dma_map_single(priv->ca, 125 mtod(m, void *), m->m_len, DMA_FROM_DEVICE); 126 if (unlikely(ib_dma_mapping_error(priv->ca, 127 rx_req->mapping[i]))) 128 goto error; 129 130 } 131 rx_req->mb = mb; 132 return (mb); 133 error: 134 for (j = 0, m = mb; j < i; m = m->m_next, j++) 135 ib_dma_unmap_single(priv->ca, rx_req->mapping[j], m->m_len, 136 DMA_FROM_DEVICE); 137 m_freem(mb); 138 return (NULL); 139 140 } 141 142 static int ipoib_ib_post_receive(struct ipoib_dev_priv *priv, int id) 143 { 144 struct ipoib_rx_buf *rx_req; 145 struct ib_recv_wr *bad_wr; 146 struct mbuf *m; 147 int ret; 148 int i; 149 150 rx_req = &priv->rx_ring[id]; 151 for (m = rx_req->mb, i = 0; m != NULL; m = m->m_next, i++) { 152 priv->rx_sge[i].addr = rx_req->mapping[i]; 153 priv->rx_sge[i].length = m->m_len; 154 } 155 priv->rx_wr.num_sge = i; 156 priv->rx_wr.wr_id = id | IPOIB_OP_RECV; 157 158 ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr); 159 if (unlikely(ret)) { 160 ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret); 161 ipoib_dma_unmap_rx(priv, &priv->rx_ring[id]); 162 m_freem(priv->rx_ring[id].mb); 163 priv->rx_ring[id].mb = NULL; 164 } 165 166 return ret; 167 } 168 169 static struct mbuf * 170 ipoib_alloc_rx_mb(struct ipoib_dev_priv *priv, int id) 171 { 172 173 return ipoib_alloc_map_mb(priv, &priv->rx_ring[id], 174 priv->max_ib_mtu + IB_GRH_BYTES); 175 } 176 177 static int ipoib_ib_post_receives(struct ipoib_dev_priv *priv) 178 { 179 int i; 180 181 for (i = 0; i < ipoib_recvq_size; ++i) { 182 if (!ipoib_alloc_rx_mb(priv, i)) { 183 ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); 184 return -ENOMEM; 185 } 186 if (ipoib_ib_post_receive(priv, i)) { 187 ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i); 188 return -EIO; 189 } 190 } 191 192 return 0; 193 } 194 195 static void 196 ipoib_ib_handle_rx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc) 197 { 198 struct ipoib_rx_buf saverx; 199 unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV; 200 struct ifnet *dev = priv->dev; 201 struct ipoib_header *eh; 202 struct mbuf *mb; 203 204 ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n", 205 wr_id, wc->status); 206 207 if (unlikely(wr_id >= ipoib_recvq_size)) { 208 ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n", 209 wr_id, ipoib_recvq_size); 210 return; 211 } 212 213 mb = priv->rx_ring[wr_id].mb; 214 215 if (unlikely(wc->status != IB_WC_SUCCESS)) { 216 if (wc->status != IB_WC_WR_FLUSH_ERR) { 217 ipoib_warn(priv, "failed recv event " 218 "(status=%d, wrid=%d vend_err %x)\n", 219 wc->status, wr_id, wc->vendor_err); 220 goto repost; 221 } 222 if (mb) { 223 ipoib_dma_unmap_rx(priv, &priv->rx_ring[wr_id]); 224 m_freem(mb); 225 priv->rx_ring[wr_id].mb = NULL; 226 } 227 return; 228 } 229 230 /* 231 * Drop packets that this interface sent, ie multicast packets 232 * that the HCA has replicated. 233 */ 234 if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num) 235 goto repost; 236 237 memcpy(&saverx, &priv->rx_ring[wr_id], sizeof(saverx)); 238 /* 239 * If we can't allocate a new RX buffer, dump 240 * this packet and reuse the old buffer. 241 */ 242 if (unlikely(!ipoib_alloc_rx_mb(priv, wr_id))) { 243 memcpy(&priv->rx_ring[wr_id], &saverx, sizeof(saverx)); 244 if_inc_counter(dev, IFCOUNTER_IQDROPS, 1); 245 goto repost; 246 } 247 248 ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", 249 wc->byte_len, wc->slid); 250 251 ipoib_dma_unmap_rx(priv, &saverx); 252 ipoib_dma_mb(priv, mb, wc->byte_len); 253 254 if_inc_counter(dev, IFCOUNTER_IPACKETS, 1); 255 if_inc_counter(dev, IFCOUNTER_IBYTES, mb->m_pkthdr.len); 256 mb->m_pkthdr.rcvif = dev; 257 m_adj(mb, sizeof(struct ib_grh) - INFINIBAND_ALEN); 258 eh = mtod(mb, struct ipoib_header *); 259 bzero(eh->hwaddr, 4); /* Zero the queue pair, only dgid is in grh */ 260 261 if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->wc_flags & IB_WC_IP_CSUM_OK)) 262 mb->m_pkthdr.csum_flags = CSUM_IP_CHECKED | CSUM_IP_VALID; 263 264 dev->if_input(dev, mb); 265 266 repost: 267 if (unlikely(ipoib_ib_post_receive(priv, wr_id))) 268 ipoib_warn(priv, "ipoib_ib_post_receive failed " 269 "for buf %d\n", wr_id); 270 } 271 272 int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req, int max) 273 { 274 struct mbuf *mb = tx_req->mb; 275 u64 *mapping = tx_req->mapping; 276 struct mbuf *m, *p; 277 int error; 278 int i; 279 280 for (m = mb, p = NULL, i = 0; m != NULL; p = m, m = m->m_next, i++) { 281 if (m->m_len != 0) 282 continue; 283 if (p == NULL) 284 panic("ipoib_dma_map_tx: First mbuf empty\n"); 285 p->m_next = m_free(m); 286 m = p; 287 i--; 288 } 289 i--; 290 if (i >= max) { 291 tx_req->mb = mb = m_defrag(mb, M_NOWAIT); 292 if (mb == NULL) 293 return -EIO; 294 for (m = mb, i = 0; m != NULL; m = m->m_next, i++); 295 if (i >= max) 296 return -EIO; 297 } 298 error = 0; 299 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) { 300 mapping[i] = ib_dma_map_single(ca, mtod(m, void *), 301 m->m_len, DMA_TO_DEVICE); 302 if (unlikely(ib_dma_mapping_error(ca, mapping[i]))) { 303 error = -EIO; 304 break; 305 } 306 } 307 if (error) { 308 int end; 309 310 end = i; 311 for (m = mb, i = 0; i < end; m = m->m_next, i++) 312 ib_dma_unmap_single(ca, mapping[i], m->m_len, 313 DMA_TO_DEVICE); 314 } 315 return error; 316 } 317 318 void ipoib_dma_unmap_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req) 319 { 320 struct mbuf *mb = tx_req->mb; 321 u64 *mapping = tx_req->mapping; 322 struct mbuf *m; 323 int i; 324 325 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) 326 ib_dma_unmap_single(ca, mapping[i], m->m_len, DMA_TO_DEVICE); 327 } 328 329 static void ipoib_ib_handle_tx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc) 330 { 331 struct ifnet *dev = priv->dev; 332 unsigned int wr_id = wc->wr_id; 333 struct ipoib_tx_buf *tx_req; 334 335 ipoib_dbg_data(priv, "send completion: id %d, status: %d\n", 336 wr_id, wc->status); 337 338 if (unlikely(wr_id >= ipoib_sendq_size)) { 339 ipoib_warn(priv, "send completion event with wrid %d (> %d)\n", 340 wr_id, ipoib_sendq_size); 341 return; 342 } 343 344 tx_req = &priv->tx_ring[wr_id]; 345 346 ipoib_dma_unmap_tx(priv->ca, tx_req); 347 348 if_inc_counter(dev, IFCOUNTER_OPACKETS, 1); 349 350 m_freem(tx_req->mb); 351 352 ++priv->tx_tail; 353 if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && 354 (dev->if_drv_flags & IFF_DRV_OACTIVE) && 355 test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 356 dev->if_drv_flags &= ~IFF_DRV_OACTIVE; 357 358 if (wc->status != IB_WC_SUCCESS && 359 wc->status != IB_WC_WR_FLUSH_ERR) 360 ipoib_warn(priv, "failed send event " 361 "(status=%d, wrid=%d vend_err %x)\n", 362 wc->status, wr_id, wc->vendor_err); 363 } 364 365 int 366 ipoib_poll_tx(struct ipoib_dev_priv *priv) 367 { 368 int n, i; 369 370 n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc); 371 for (i = 0; i < n; ++i) { 372 struct ib_wc *wc = priv->send_wc + i; 373 if (wc->wr_id & IPOIB_OP_CM) 374 ipoib_cm_handle_tx_wc(priv, wc); 375 else 376 ipoib_ib_handle_tx_wc(priv, wc); 377 } 378 379 return n == MAX_SEND_CQE; 380 } 381 382 static void 383 ipoib_poll(struct ipoib_dev_priv *priv) 384 { 385 int n, i; 386 387 poll_more: 388 spin_lock(&priv->drain_lock); 389 for (;;) { 390 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); 391 for (i = 0; i < n; i++) { 392 struct ib_wc *wc = priv->ibwc + i; 393 394 if ((wc->wr_id & IPOIB_OP_RECV) == 0) 395 panic("ipoib_poll: Bad wr_id 0x%jX\n", 396 (intmax_t)wc->wr_id); 397 if (wc->wr_id & IPOIB_OP_CM) 398 ipoib_cm_handle_rx_wc(priv, wc); 399 else 400 ipoib_ib_handle_rx_wc(priv, wc); 401 } 402 403 if (n != IPOIB_NUM_WC) 404 break; 405 } 406 spin_unlock(&priv->drain_lock); 407 408 if (ib_req_notify_cq(priv->recv_cq, 409 IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS)) 410 goto poll_more; 411 } 412 413 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) 414 { 415 struct ipoib_dev_priv *priv = dev_ptr; 416 417 ipoib_poll(priv); 418 } 419 420 static void drain_tx_cq(struct ipoib_dev_priv *priv) 421 { 422 struct ifnet *dev = priv->dev; 423 424 spin_lock(&priv->lock); 425 while (ipoib_poll_tx(priv)) 426 ; /* nothing */ 427 428 if (dev->if_drv_flags & IFF_DRV_OACTIVE) 429 mod_timer(&priv->poll_timer, jiffies + 1); 430 431 spin_unlock(&priv->lock); 432 } 433 434 void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr) 435 { 436 struct ipoib_dev_priv *priv = dev_ptr; 437 438 mod_timer(&priv->poll_timer, jiffies); 439 } 440 441 static inline int 442 post_send(struct ipoib_dev_priv *priv, unsigned int wr_id, 443 struct ib_ah *address, u32 qpn, struct ipoib_tx_buf *tx_req, void *head, 444 int hlen) 445 { 446 struct ib_send_wr *bad_wr; 447 struct mbuf *mb = tx_req->mb; 448 u64 *mapping = tx_req->mapping; 449 struct mbuf *m; 450 int i; 451 452 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) { 453 priv->tx_sge[i].addr = mapping[i]; 454 priv->tx_sge[i].length = m->m_len; 455 } 456 priv->tx_wr.wr.num_sge = i; 457 priv->tx_wr.wr.wr_id = wr_id; 458 priv->tx_wr.remote_qpn = qpn; 459 priv->tx_wr.ah = address; 460 461 if (head) { 462 priv->tx_wr.mss = 0; /* XXX mb_shinfo(mb)->gso_size; */ 463 priv->tx_wr.header = head; 464 priv->tx_wr.hlen = hlen; 465 priv->tx_wr.wr.opcode = IB_WR_LSO; 466 } else 467 priv->tx_wr.wr.opcode = IB_WR_SEND; 468 469 return ib_post_send(priv->qp, &priv->tx_wr.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.wr.send_flags |= IB_SEND_IP_CSUM; 529 else 530 priv->tx_wr.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 set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); 643 644 return 0; 645 } 646 647 static void ipoib_pkey_dev_check_presence(struct ipoib_dev_priv *priv) 648 { 649 u16 pkey_index = 0; 650 651 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) 652 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 653 else 654 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 655 } 656 657 int ipoib_ib_dev_up(struct ipoib_dev_priv *priv) 658 { 659 660 ipoib_pkey_dev_check_presence(priv); 661 662 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 663 ipoib_dbg(priv, "PKEY is not assigned.\n"); 664 return 0; 665 } 666 667 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 668 669 return ipoib_mcast_start_thread(priv); 670 } 671 672 int ipoib_ib_dev_down(struct ipoib_dev_priv *priv, int flush) 673 { 674 675 ipoib_dbg(priv, "downing ib_dev\n"); 676 677 clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 678 if_link_state_change(priv->dev, LINK_STATE_DOWN); 679 680 /* Shutdown the P_Key thread if still active */ 681 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 682 mutex_lock(&pkey_mutex); 683 set_bit(IPOIB_PKEY_STOP, &priv->flags); 684 cancel_delayed_work(&priv->pkey_poll_task); 685 mutex_unlock(&pkey_mutex); 686 if (flush) 687 flush_workqueue(ipoib_workqueue); 688 } 689 690 ipoib_mcast_stop_thread(priv, flush); 691 ipoib_mcast_dev_flush(priv); 692 693 ipoib_flush_paths(priv); 694 695 return 0; 696 } 697 698 static int recvs_pending(struct ipoib_dev_priv *priv) 699 { 700 int pending = 0; 701 int i; 702 703 for (i = 0; i < ipoib_recvq_size; ++i) 704 if (priv->rx_ring[i].mb) 705 ++pending; 706 707 return pending; 708 } 709 710 void ipoib_drain_cq(struct ipoib_dev_priv *priv) 711 { 712 int i, n; 713 714 spin_lock(&priv->drain_lock); 715 do { 716 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); 717 for (i = 0; i < n; ++i) { 718 /* 719 * Convert any successful completions to flush 720 * errors to avoid passing packets up the 721 * stack after bringing the device down. 722 */ 723 if (priv->ibwc[i].status == IB_WC_SUCCESS) 724 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; 725 726 if ((priv->ibwc[i].wr_id & IPOIB_OP_RECV) == 0) 727 panic("ipoib_drain_cq: Bad wrid 0x%jX\n", 728 (intmax_t)priv->ibwc[i].wr_id); 729 if (priv->ibwc[i].wr_id & IPOIB_OP_CM) 730 ipoib_cm_handle_rx_wc(priv, priv->ibwc + i); 731 else 732 ipoib_ib_handle_rx_wc(priv, priv->ibwc + i); 733 } 734 } while (n == IPOIB_NUM_WC); 735 spin_unlock(&priv->drain_lock); 736 737 spin_lock(&priv->lock); 738 while (ipoib_poll_tx(priv)) 739 ; /* nothing */ 740 741 spin_unlock(&priv->lock); 742 } 743 744 int ipoib_ib_dev_stop(struct ipoib_dev_priv *priv, int flush) 745 { 746 struct ib_qp_attr qp_attr; 747 unsigned long begin; 748 struct ipoib_tx_buf *tx_req; 749 int i; 750 751 clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); 752 753 ipoib_cm_dev_stop(priv); 754 755 /* 756 * Move our QP to the error state and then reinitialize in 757 * when all work requests have completed or have been flushed. 758 */ 759 qp_attr.qp_state = IB_QPS_ERR; 760 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 761 ipoib_warn(priv, "Failed to modify QP to ERROR state\n"); 762 763 /* Wait for all sends and receives to complete */ 764 begin = jiffies; 765 766 while (priv->tx_head != priv->tx_tail || recvs_pending(priv)) { 767 if (time_after(jiffies, begin + 5 * HZ)) { 768 ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", 769 priv->tx_head - priv->tx_tail, recvs_pending(priv)); 770 771 /* 772 * assume the HW is wedged and just free up 773 * all our pending work requests. 774 */ 775 while ((int) priv->tx_tail - (int) priv->tx_head < 0) { 776 tx_req = &priv->tx_ring[priv->tx_tail & 777 (ipoib_sendq_size - 1)]; 778 ipoib_dma_unmap_tx(priv->ca, tx_req); 779 m_freem(tx_req->mb); 780 ++priv->tx_tail; 781 --priv->tx_outstanding; 782 } 783 784 for (i = 0; i < ipoib_recvq_size; ++i) { 785 struct ipoib_rx_buf *rx_req; 786 787 rx_req = &priv->rx_ring[i]; 788 if (!rx_req->mb) 789 continue; 790 ipoib_dma_unmap_rx(priv, &priv->rx_ring[i]); 791 m_freem(rx_req->mb); 792 rx_req->mb = NULL; 793 } 794 795 goto timeout; 796 } 797 798 ipoib_drain_cq(priv); 799 800 msleep(1); 801 } 802 803 ipoib_dbg(priv, "All sends and receives done.\n"); 804 805 timeout: 806 del_timer_sync(&priv->poll_timer); 807 qp_attr.qp_state = IB_QPS_RESET; 808 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 809 ipoib_warn(priv, "Failed to modify QP to RESET state\n"); 810 811 /* Wait for all AHs to be reaped */ 812 set_bit(IPOIB_STOP_REAPER, &priv->flags); 813 cancel_delayed_work(&priv->ah_reap_task); 814 if (flush) 815 flush_workqueue(ipoib_workqueue); 816 817 ipoib_ah_dev_cleanup(priv); 818 819 ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP); 820 821 return 0; 822 } 823 824 int ipoib_ib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port) 825 { 826 struct ifnet *dev = priv->dev; 827 828 priv->ca = ca; 829 priv->port = port; 830 priv->qp = NULL; 831 832 if (ipoib_transport_dev_init(priv, ca)) { 833 printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); 834 return -ENODEV; 835 } 836 837 setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func, 838 (unsigned long) priv); 839 840 if (dev->if_flags & IFF_UP) { 841 if (ipoib_ib_dev_open(priv)) { 842 ipoib_transport_dev_cleanup(priv); 843 return -ENODEV; 844 } 845 } 846 847 return 0; 848 } 849 850 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, 851 enum ipoib_flush_level level) 852 { 853 struct ipoib_dev_priv *cpriv; 854 u16 new_index; 855 856 mutex_lock(&priv->vlan_mutex); 857 858 /* 859 * Flush any child interfaces too -- they might be up even if 860 * the parent is down. 861 */ 862 list_for_each_entry(cpriv, &priv->child_intfs, list) 863 __ipoib_ib_dev_flush(cpriv, level); 864 865 mutex_unlock(&priv->vlan_mutex); 866 867 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) { 868 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); 869 return; 870 } 871 872 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 873 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); 874 return; 875 } 876 877 if (level == IPOIB_FLUSH_HEAVY) { 878 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) { 879 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 880 ipoib_ib_dev_down(priv, 0); 881 ipoib_ib_dev_stop(priv, 0); 882 if (ipoib_pkey_dev_delay_open(priv)) 883 return; 884 } 885 886 /* restart QP only if P_Key index is changed */ 887 if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) && 888 new_index == priv->pkey_index) { 889 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); 890 return; 891 } 892 priv->pkey_index = new_index; 893 } 894 895 if (level == IPOIB_FLUSH_LIGHT) { 896 ipoib_mark_paths_invalid(priv); 897 ipoib_mcast_dev_flush(priv); 898 } 899 900 if (level >= IPOIB_FLUSH_NORMAL) 901 ipoib_ib_dev_down(priv, 0); 902 903 if (level == IPOIB_FLUSH_HEAVY) { 904 ipoib_ib_dev_stop(priv, 0); 905 ipoib_ib_dev_open(priv); 906 } 907 908 /* 909 * The device could have been brought down between the start and when 910 * we get here, don't bring it back up if it's not configured up 911 */ 912 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 913 if (level >= IPOIB_FLUSH_NORMAL) 914 ipoib_ib_dev_up(priv); 915 ipoib_mcast_restart_task(&priv->restart_task); 916 } 917 } 918 919 void ipoib_ib_dev_flush_light(struct work_struct *work) 920 { 921 struct ipoib_dev_priv *priv = 922 container_of(work, struct ipoib_dev_priv, flush_light); 923 924 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT); 925 } 926 927 void ipoib_ib_dev_flush_normal(struct work_struct *work) 928 { 929 struct ipoib_dev_priv *priv = 930 container_of(work, struct ipoib_dev_priv, flush_normal); 931 932 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL); 933 } 934 935 void ipoib_ib_dev_flush_heavy(struct work_struct *work) 936 { 937 struct ipoib_dev_priv *priv = 938 container_of(work, struct ipoib_dev_priv, flush_heavy); 939 940 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY); 941 } 942 943 void ipoib_ib_dev_cleanup(struct ipoib_dev_priv *priv) 944 { 945 946 ipoib_dbg(priv, "cleaning up ib_dev\n"); 947 948 ipoib_mcast_stop_thread(priv, 1); 949 ipoib_mcast_dev_flush(priv); 950 951 ipoib_ah_dev_cleanup(priv); 952 ipoib_transport_dev_cleanup(priv); 953 } 954 955 /* 956 * Delayed P_Key Assigment Interim Support 957 * 958 * The following is initial implementation of delayed P_Key assigment 959 * mechanism. It is using the same approach implemented for the multicast 960 * group join. The single goal of this implementation is to quickly address 961 * Bug #2507. This implementation will probably be removed when the P_Key 962 * change async notification is available. 963 */ 964 965 void ipoib_pkey_poll(struct work_struct *work) 966 { 967 struct ipoib_dev_priv *priv = 968 container_of(work, struct ipoib_dev_priv, pkey_poll_task.work); 969 970 ipoib_pkey_dev_check_presence(priv); 971 972 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) 973 ipoib_open(priv); 974 else { 975 mutex_lock(&pkey_mutex); 976 if (!test_bit(IPOIB_PKEY_STOP, &priv->flags)) 977 queue_delayed_work(ipoib_workqueue, 978 &priv->pkey_poll_task, 979 HZ); 980 mutex_unlock(&pkey_mutex); 981 } 982 } 983 984 int ipoib_pkey_dev_delay_open(struct ipoib_dev_priv *priv) 985 { 986 987 /* Look for the interface pkey value in the IB Port P_Key table and */ 988 /* set the interface pkey assigment flag */ 989 ipoib_pkey_dev_check_presence(priv); 990 991 /* P_Key value not assigned yet - start polling */ 992 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 993 mutex_lock(&pkey_mutex); 994 clear_bit(IPOIB_PKEY_STOP, &priv->flags); 995 queue_delayed_work(ipoib_workqueue, 996 &priv->pkey_poll_task, 997 HZ); 998 mutex_unlock(&pkey_mutex); 999 return 1; 1000 } 1001 1002 return 0; 1003 } 1004