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->m_flags & M_EXT) ? m->m_ext.ext_size : 121 ((m->m_flags & M_PKTHDR) ? MHLEN : MLEN); 122 mb->m_pkthdr.len += m->m_len; 123 rx_req->mapping[i] = ib_dma_map_single(priv->ca, 124 mtod(m, void *), m->m_len, DMA_FROM_DEVICE); 125 if (unlikely(ib_dma_mapping_error(priv->ca, 126 rx_req->mapping[i]))) 127 goto error; 128 129 } 130 rx_req->mb = mb; 131 return (mb); 132 error: 133 for (j = 0, m = mb; j < i; m = m->m_next, j++) 134 ib_dma_unmap_single(priv->ca, rx_req->mapping[j], m->m_len, 135 DMA_FROM_DEVICE); 136 m_freem(mb); 137 return (NULL); 138 139 } 140 141 static int ipoib_ib_post_receive(struct ipoib_dev_priv *priv, int id) 142 { 143 struct ipoib_rx_buf *rx_req; 144 struct ib_recv_wr *bad_wr; 145 struct mbuf *m; 146 int ret; 147 int i; 148 149 rx_req = &priv->rx_ring[id]; 150 for (m = rx_req->mb, i = 0; m != NULL; m = m->m_next, i++) { 151 priv->rx_sge[i].addr = rx_req->mapping[i]; 152 priv->rx_sge[i].length = m->m_len; 153 } 154 priv->rx_wr.num_sge = i; 155 priv->rx_wr.wr_id = id | IPOIB_OP_RECV; 156 157 ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr); 158 if (unlikely(ret)) { 159 ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret); 160 ipoib_dma_unmap_rx(priv, &priv->rx_ring[id]); 161 m_freem(priv->rx_ring[id].mb); 162 priv->rx_ring[id].mb = NULL; 163 } 164 165 return ret; 166 } 167 168 static struct mbuf * 169 ipoib_alloc_rx_mb(struct ipoib_dev_priv *priv, int id) 170 { 171 172 return ipoib_alloc_map_mb(priv, &priv->rx_ring[id], 173 priv->max_ib_mtu + IB_GRH_BYTES); 174 } 175 176 static int ipoib_ib_post_receives(struct ipoib_dev_priv *priv) 177 { 178 int i; 179 180 for (i = 0; i < ipoib_recvq_size; ++i) { 181 if (!ipoib_alloc_rx_mb(priv, i)) { 182 ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); 183 return -ENOMEM; 184 } 185 if (ipoib_ib_post_receive(priv, i)) { 186 ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i); 187 return -EIO; 188 } 189 } 190 191 return 0; 192 } 193 194 static void 195 ipoib_ib_handle_rx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc) 196 { 197 struct ipoib_rx_buf saverx; 198 unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV; 199 struct ifnet *dev = priv->dev; 200 struct ipoib_header *eh; 201 struct mbuf *mb; 202 203 ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n", 204 wr_id, wc->status); 205 206 if (unlikely(wr_id >= ipoib_recvq_size)) { 207 ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n", 208 wr_id, ipoib_recvq_size); 209 return; 210 } 211 212 mb = priv->rx_ring[wr_id].mb; 213 214 if (unlikely(wc->status != IB_WC_SUCCESS)) { 215 if (wc->status != IB_WC_WR_FLUSH_ERR) { 216 ipoib_warn(priv, "failed recv event " 217 "(status=%d, wrid=%d vend_err %x)\n", 218 wc->status, wr_id, wc->vendor_err); 219 goto repost; 220 } 221 if (mb) { 222 ipoib_dma_unmap_rx(priv, &priv->rx_ring[wr_id]); 223 m_freem(mb); 224 priv->rx_ring[wr_id].mb = NULL; 225 } 226 return; 227 } 228 229 /* 230 * Drop packets that this interface sent, ie multicast packets 231 * that the HCA has replicated. 232 */ 233 if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num) 234 goto repost; 235 236 memcpy(&saverx, &priv->rx_ring[wr_id], sizeof(saverx)); 237 /* 238 * If we can't allocate a new RX buffer, dump 239 * this packet and reuse the old buffer. 240 */ 241 if (unlikely(!ipoib_alloc_rx_mb(priv, wr_id))) { 242 memcpy(&priv->rx_ring[wr_id], &saverx, sizeof(saverx)); 243 dev->if_iqdrops++; 244 goto repost; 245 } 246 247 ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", 248 wc->byte_len, wc->slid); 249 250 ipoib_dma_unmap_rx(priv, &saverx); 251 ipoib_dma_mb(priv, mb, wc->byte_len); 252 253 ++dev->if_ipackets; 254 dev->if_ibytes += mb->m_pkthdr.len; 255 mb->m_pkthdr.rcvif = dev; 256 m_adj(mb, sizeof(struct ib_grh) - INFINIBAND_ALEN); 257 eh = mtod(mb, struct ipoib_header *); 258 bzero(eh->hwaddr, 4); /* Zero the queue pair, only dgid is in grh */ 259 260 if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->csum_ok)) 261 mb->m_pkthdr.csum_flags = CSUM_IP_CHECKED | CSUM_IP_VALID; 262 263 dev->if_input(dev, mb); 264 265 repost: 266 if (unlikely(ipoib_ib_post_receive(priv, wr_id))) 267 ipoib_warn(priv, "ipoib_ib_post_receive failed " 268 "for buf %d\n", wr_id); 269 } 270 271 int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req, int max) 272 { 273 struct mbuf *mb = tx_req->mb; 274 u64 *mapping = tx_req->mapping; 275 struct mbuf *m, *p; 276 int error; 277 int i; 278 279 for (m = mb, p = NULL, i = 0; m != NULL; p = m, m = m->m_next, i++) { 280 if (m->m_len != 0) 281 continue; 282 if (p == NULL) 283 panic("ipoib_dma_map_tx: First mbuf empty\n"); 284 p->m_next = m_free(m); 285 m = p; 286 i--; 287 } 288 i--; 289 if (i >= max) { 290 tx_req->mb = mb = m_defrag(mb, M_NOWAIT); 291 if (mb == NULL) 292 return -EIO; 293 for (m = mb, i = 0; m != NULL; m = m->m_next, i++); 294 if (i >= max) 295 return -EIO; 296 } 297 error = 0; 298 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) { 299 mapping[i] = ib_dma_map_single(ca, mtod(m, void *), 300 m->m_len, DMA_TO_DEVICE); 301 if (unlikely(ib_dma_mapping_error(ca, mapping[i]))) { 302 error = -EIO; 303 break; 304 } 305 } 306 if (error) { 307 int end; 308 309 end = i; 310 for (m = mb, i = 0; i < end; m = m->m_next, i++) 311 ib_dma_unmap_single(ca, mapping[i], m->m_len, 312 DMA_TO_DEVICE); 313 } 314 return error; 315 } 316 317 void ipoib_dma_unmap_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req) 318 { 319 struct mbuf *mb = tx_req->mb; 320 u64 *mapping = tx_req->mapping; 321 struct mbuf *m; 322 int i; 323 324 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) 325 ib_dma_unmap_single(ca, mapping[i], m->m_len, DMA_TO_DEVICE); 326 } 327 328 static void ipoib_ib_handle_tx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc) 329 { 330 struct ifnet *dev = priv->dev; 331 unsigned int wr_id = wc->wr_id; 332 struct ipoib_tx_buf *tx_req; 333 334 ipoib_dbg_data(priv, "send completion: id %d, status: %d\n", 335 wr_id, wc->status); 336 337 if (unlikely(wr_id >= ipoib_sendq_size)) { 338 ipoib_warn(priv, "send completion event with wrid %d (> %d)\n", 339 wr_id, ipoib_sendq_size); 340 return; 341 } 342 343 tx_req = &priv->tx_ring[wr_id]; 344 345 ipoib_dma_unmap_tx(priv->ca, tx_req); 346 347 ++dev->if_opackets; 348 349 m_freem(tx_req->mb); 350 351 ++priv->tx_tail; 352 if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && 353 (dev->if_drv_flags & IFF_DRV_OACTIVE) && 354 test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 355 dev->if_drv_flags &= ~IFF_DRV_OACTIVE; 356 357 if (wc->status != IB_WC_SUCCESS && 358 wc->status != IB_WC_WR_FLUSH_ERR) 359 ipoib_warn(priv, "failed send event " 360 "(status=%d, wrid=%d vend_err %x)\n", 361 wc->status, wr_id, wc->vendor_err); 362 } 363 364 int 365 ipoib_poll_tx(struct ipoib_dev_priv *priv) 366 { 367 int n, i; 368 369 n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc); 370 for (i = 0; i < n; ++i) { 371 struct ib_wc *wc = priv->send_wc + i; 372 if (wc->wr_id & IPOIB_OP_CM) 373 ipoib_cm_handle_tx_wc(priv, wc); 374 else 375 ipoib_ib_handle_tx_wc(priv, wc); 376 } 377 378 return n == MAX_SEND_CQE; 379 } 380 381 static void 382 ipoib_poll(struct ipoib_dev_priv *priv) 383 { 384 int n, i; 385 386 poll_more: 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 } 405 406 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 ++dev->if_oerrors; 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 ++dev->if_oerrors; 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 ++dev->if_oerrors; 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 ++dev->if_oerrors; 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 do { 712 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); 713 for (i = 0; i < n; ++i) { 714 /* 715 * Convert any successful completions to flush 716 * errors to avoid passing packets up the 717 * stack after bringing the device down. 718 */ 719 if (priv->ibwc[i].status == IB_WC_SUCCESS) 720 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; 721 722 if ((priv->ibwc[i].wr_id & IPOIB_OP_RECV) == 0) 723 panic("ipoib_drain_cq: Bad wrid 0x%jX\n", 724 (intmax_t)priv->ibwc[i].wr_id); 725 if (priv->ibwc[i].wr_id & IPOIB_OP_CM) 726 ipoib_cm_handle_rx_wc(priv, priv->ibwc + i); 727 else 728 ipoib_ib_handle_rx_wc(priv, priv->ibwc + i); 729 } 730 } while (n == IPOIB_NUM_WC); 731 732 spin_lock(&priv->lock); 733 while (ipoib_poll_tx(priv)) 734 ; /* nothing */ 735 736 spin_unlock(&priv->lock); 737 } 738 739 int ipoib_ib_dev_stop(struct ipoib_dev_priv *priv, int flush) 740 { 741 struct ib_qp_attr qp_attr; 742 unsigned long begin; 743 struct ipoib_tx_buf *tx_req; 744 int i; 745 746 ipoib_cm_dev_stop(priv); 747 748 /* 749 * Move our QP to the error state and then reinitialize in 750 * when all work requests have completed or have been flushed. 751 */ 752 qp_attr.qp_state = IB_QPS_ERR; 753 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 754 ipoib_warn(priv, "Failed to modify QP to ERROR state\n"); 755 756 /* Wait for all sends and receives to complete */ 757 begin = jiffies; 758 759 while (priv->tx_head != priv->tx_tail || recvs_pending(priv)) { 760 if (time_after(jiffies, begin + 5 * HZ)) { 761 ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", 762 priv->tx_head - priv->tx_tail, recvs_pending(priv)); 763 764 /* 765 * assume the HW is wedged and just free up 766 * all our pending work requests. 767 */ 768 while ((int) priv->tx_tail - (int) priv->tx_head < 0) { 769 tx_req = &priv->tx_ring[priv->tx_tail & 770 (ipoib_sendq_size - 1)]; 771 ipoib_dma_unmap_tx(priv->ca, tx_req); 772 m_freem(tx_req->mb); 773 ++priv->tx_tail; 774 --priv->tx_outstanding; 775 } 776 777 for (i = 0; i < ipoib_recvq_size; ++i) { 778 struct ipoib_rx_buf *rx_req; 779 780 rx_req = &priv->rx_ring[i]; 781 if (!rx_req->mb) 782 continue; 783 ipoib_dma_unmap_rx(priv, &priv->rx_ring[i]); 784 m_freem(rx_req->mb); 785 rx_req->mb = NULL; 786 } 787 788 goto timeout; 789 } 790 791 ipoib_drain_cq(priv); 792 793 msleep(1); 794 } 795 796 ipoib_dbg(priv, "All sends and receives done.\n"); 797 798 timeout: 799 del_timer_sync(&priv->poll_timer); 800 qp_attr.qp_state = IB_QPS_RESET; 801 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 802 ipoib_warn(priv, "Failed to modify QP to RESET state\n"); 803 804 /* Wait for all AHs to be reaped */ 805 set_bit(IPOIB_STOP_REAPER, &priv->flags); 806 cancel_delayed_work(&priv->ah_reap_task); 807 if (flush) 808 flush_workqueue(ipoib_workqueue); 809 810 ipoib_ah_dev_cleanup(priv); 811 812 ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP); 813 814 return 0; 815 } 816 817 int ipoib_ib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port) 818 { 819 struct ifnet *dev = priv->dev; 820 821 priv->ca = ca; 822 priv->port = port; 823 priv->qp = NULL; 824 825 if (ipoib_transport_dev_init(priv, ca)) { 826 printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); 827 return -ENODEV; 828 } 829 830 setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func, 831 (unsigned long) priv); 832 833 if (dev->if_flags & IFF_UP) { 834 if (ipoib_ib_dev_open(priv)) { 835 ipoib_transport_dev_cleanup(priv); 836 return -ENODEV; 837 } 838 } 839 840 return 0; 841 } 842 843 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, 844 enum ipoib_flush_level level) 845 { 846 struct ipoib_dev_priv *cpriv; 847 u16 new_index; 848 849 mutex_lock(&priv->vlan_mutex); 850 851 /* 852 * Flush any child interfaces too -- they might be up even if 853 * the parent is down. 854 */ 855 list_for_each_entry(cpriv, &priv->child_intfs, list) 856 __ipoib_ib_dev_flush(cpriv, level); 857 858 mutex_unlock(&priv->vlan_mutex); 859 860 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) { 861 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); 862 return; 863 } 864 865 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 866 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); 867 return; 868 } 869 870 if (level == IPOIB_FLUSH_HEAVY) { 871 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) { 872 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 873 ipoib_ib_dev_down(priv, 0); 874 ipoib_ib_dev_stop(priv, 0); 875 if (ipoib_pkey_dev_delay_open(priv)) 876 return; 877 } 878 879 /* restart QP only if P_Key index is changed */ 880 if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) && 881 new_index == priv->pkey_index) { 882 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); 883 return; 884 } 885 priv->pkey_index = new_index; 886 } 887 888 if (level == IPOIB_FLUSH_LIGHT) { 889 ipoib_mark_paths_invalid(priv); 890 ipoib_mcast_dev_flush(priv); 891 } 892 893 if (level >= IPOIB_FLUSH_NORMAL) 894 ipoib_ib_dev_down(priv, 0); 895 896 if (level == IPOIB_FLUSH_HEAVY) { 897 ipoib_ib_dev_stop(priv, 0); 898 ipoib_ib_dev_open(priv); 899 } 900 901 /* 902 * The device could have been brought down between the start and when 903 * we get here, don't bring it back up if it's not configured up 904 */ 905 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 906 if (level >= IPOIB_FLUSH_NORMAL) 907 ipoib_ib_dev_up(priv); 908 ipoib_mcast_restart_task(&priv->restart_task); 909 } 910 } 911 912 void ipoib_ib_dev_flush_light(struct work_struct *work) 913 { 914 struct ipoib_dev_priv *priv = 915 container_of(work, struct ipoib_dev_priv, flush_light); 916 917 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT); 918 } 919 920 void ipoib_ib_dev_flush_normal(struct work_struct *work) 921 { 922 struct ipoib_dev_priv *priv = 923 container_of(work, struct ipoib_dev_priv, flush_normal); 924 925 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL); 926 } 927 928 void ipoib_ib_dev_flush_heavy(struct work_struct *work) 929 { 930 struct ipoib_dev_priv *priv = 931 container_of(work, struct ipoib_dev_priv, flush_heavy); 932 933 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY); 934 } 935 936 void ipoib_ib_dev_cleanup(struct ipoib_dev_priv *priv) 937 { 938 939 ipoib_dbg(priv, "cleaning up ib_dev\n"); 940 941 ipoib_mcast_stop_thread(priv, 1); 942 ipoib_mcast_dev_flush(priv); 943 944 ipoib_ah_dev_cleanup(priv); 945 ipoib_transport_dev_cleanup(priv); 946 } 947 948 /* 949 * Delayed P_Key Assigment Interim Support 950 * 951 * The following is initial implementation of delayed P_Key assigment 952 * mechanism. It is using the same approach implemented for the multicast 953 * group join. The single goal of this implementation is to quickly address 954 * Bug #2507. This implementation will probably be removed when the P_Key 955 * change async notification is available. 956 */ 957 958 void ipoib_pkey_poll(struct work_struct *work) 959 { 960 struct ipoib_dev_priv *priv = 961 container_of(work, struct ipoib_dev_priv, pkey_poll_task.work); 962 963 ipoib_pkey_dev_check_presence(priv); 964 965 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) 966 ipoib_open(priv); 967 else { 968 mutex_lock(&pkey_mutex); 969 if (!test_bit(IPOIB_PKEY_STOP, &priv->flags)) 970 queue_delayed_work(ipoib_workqueue, 971 &priv->pkey_poll_task, 972 HZ); 973 mutex_unlock(&pkey_mutex); 974 } 975 } 976 977 int ipoib_pkey_dev_delay_open(struct ipoib_dev_priv *priv) 978 { 979 980 /* Look for the interface pkey value in the IB Port P_Key table and */ 981 /* set the interface pkey assigment flag */ 982 ipoib_pkey_dev_check_presence(priv); 983 984 /* P_Key value not assigned yet - start polling */ 985 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 986 mutex_lock(&pkey_mutex); 987 clear_bit(IPOIB_PKEY_STOP, &priv->flags); 988 queue_delayed_work(ipoib_workqueue, 989 &priv->pkey_poll_task, 990 HZ); 991 mutex_unlock(&pkey_mutex); 992 return 1; 993 } 994 995 return 0; 996 } 997