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sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_ib.c
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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 <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include "ipoib.h" 42 43 #include <rdma/ib_cache.h> 44 45 #include <security/mac/mac_framework.h> 46 47 #include <linux/delay.h> 48 #include <linux/dma-mapping.h> 49 50 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA 51 static int data_debug_level; 52 53 module_param(data_debug_level, int, 0644); 54 MODULE_PARM_DESC(data_debug_level, 55 "Enable data path debug tracing if > 0"); 56 #endif 57 58 static DEFINE_MUTEX(pkey_mutex); 59 60 struct ipoib_ah *ipoib_create_ah(struct ipoib_dev_priv *priv, 61 struct ib_pd *pd, struct ib_ah_attr *attr) 62 { 63 struct ipoib_ah *ah; 64 65 ah = kmalloc(sizeof *ah, GFP_KERNEL); 66 if (!ah) 67 return NULL; 68 69 ah->priv = priv; 70 ah->last_send = 0; 71 kref_init(&ah->ref); 72 73 ah->ah = ib_create_ah(pd, attr, RDMA_CREATE_AH_SLEEPABLE); 74 if (IS_ERR(ah->ah)) { 75 kfree(ah); 76 ah = NULL; 77 } else 78 ipoib_dbg(priv, "Created ah %p\n", ah->ah); 79 80 return ah; 81 } 82 83 void ipoib_free_ah(struct kref *kref) 84 { 85 struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref); 86 struct ipoib_dev_priv *priv = ah->priv; 87 88 unsigned long flags; 89 90 spin_lock_irqsave(&priv->lock, flags); 91 list_add_tail(&ah->list, &priv->dead_ahs); 92 spin_unlock_irqrestore(&priv->lock, flags); 93 } 94 95 void 96 ipoib_dma_unmap_rx(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req) 97 { 98 struct mbuf *m; 99 int i; 100 101 for (i = 0, m = rx_req->mb; m != NULL; m = m->m_next, i++) 102 ib_dma_unmap_single(priv->ca, rx_req->mapping[i], m->m_len, 103 DMA_FROM_DEVICE); 104 } 105 106 void 107 ipoib_dma_mb(struct ipoib_dev_priv *priv, struct mbuf *mb, unsigned int length) 108 { 109 110 m_adj(mb, -(mb->m_pkthdr.len - length)); 111 } 112 113 struct mbuf * 114 ipoib_alloc_map_mb(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req, 115 int align, int size, int max_frags) 116 { 117 struct mbuf *mb, *m; 118 int i, j; 119 120 rx_req->mb = NULL; 121 mb = m_getm2(NULL, align + size, M_NOWAIT, MT_DATA, M_PKTHDR); 122 if (mb == NULL) 123 return (NULL); 124 for (i = 0, m = mb; m != NULL; m = m->m_next, i++) { 125 MPASS(i < max_frags); 126 127 m->m_len = M_SIZE(m) - align; 128 m->m_data += align; 129 align = 0; 130 mb->m_pkthdr.len += m->m_len; 131 rx_req->mapping[i] = ib_dma_map_single(priv->ca, 132 mtod(m, void *), m->m_len, DMA_FROM_DEVICE); 133 if (unlikely(ib_dma_mapping_error(priv->ca, 134 rx_req->mapping[i]))) 135 goto error; 136 137 } 138 rx_req->mb = mb; 139 return (mb); 140 error: 141 for (j = 0, m = mb; j < i; m = m->m_next, j++) 142 ib_dma_unmap_single(priv->ca, rx_req->mapping[j], m->m_len, 143 DMA_FROM_DEVICE); 144 m_freem(mb); 145 return (NULL); 146 147 } 148 149 static int ipoib_ib_post_receive(struct ipoib_dev_priv *priv, int id) 150 { 151 struct ipoib_rx_buf *rx_req; 152 const struct ib_recv_wr *bad_wr; 153 struct mbuf *m; 154 int ret; 155 int i; 156 157 rx_req = &priv->rx_ring[id]; 158 for (m = rx_req->mb, i = 0; m != NULL; m = m->m_next, i++) { 159 priv->rx_sge[i].addr = rx_req->mapping[i]; 160 priv->rx_sge[i].length = m->m_len; 161 } 162 priv->rx_wr.num_sge = i; 163 priv->rx_wr.wr_id = id | IPOIB_OP_RECV; 164 165 ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr); 166 if (unlikely(ret)) { 167 ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret); 168 ipoib_dma_unmap_rx(priv, &priv->rx_ring[id]); 169 m_freem(priv->rx_ring[id].mb); 170 priv->rx_ring[id].mb = NULL; 171 } 172 173 return ret; 174 } 175 176 static struct mbuf * 177 ipoib_alloc_rx_mb(struct ipoib_dev_priv *priv, int id) 178 { 179 return ipoib_alloc_map_mb(priv, &priv->rx_ring[id], 180 0, priv->max_ib_mtu + IB_GRH_BYTES, IPOIB_UD_RX_SG); 181 } 182 183 static int ipoib_ib_post_receives(struct ipoib_dev_priv *priv) 184 { 185 int i; 186 187 for (i = 0; i < ipoib_recvq_size; ++i) { 188 if (!ipoib_alloc_rx_mb(priv, i)) { 189 ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); 190 return -ENOMEM; 191 } 192 if (ipoib_ib_post_receive(priv, i)) { 193 ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i); 194 return -EIO; 195 } 196 } 197 198 return 0; 199 } 200 201 static void 202 ipoib_ib_handle_rx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc) 203 { 204 struct ipoib_rx_buf saverx; 205 unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV; 206 struct ifnet *dev = priv->dev; 207 struct ipoib_header *eh; 208 struct mbuf *mb; 209 210 ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n", 211 wr_id, wc->status); 212 213 if (unlikely(wr_id >= ipoib_recvq_size)) { 214 ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n", 215 wr_id, ipoib_recvq_size); 216 return; 217 } 218 219 mb = priv->rx_ring[wr_id].mb; 220 221 if (unlikely(wc->status != IB_WC_SUCCESS)) { 222 if (wc->status != IB_WC_WR_FLUSH_ERR) { 223 ipoib_warn(priv, "failed recv event " 224 "(status=%d, wrid=%d vend_err %x)\n", 225 wc->status, wr_id, wc->vendor_err); 226 goto repost; 227 } 228 if (mb) { 229 ipoib_dma_unmap_rx(priv, &priv->rx_ring[wr_id]); 230 m_freem(mb); 231 priv->rx_ring[wr_id].mb = NULL; 232 } 233 return; 234 } 235 236 /* 237 * Drop packets that this interface sent, ie multicast packets 238 * that the HCA has replicated. 239 */ 240 if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num) 241 goto repost; 242 243 memcpy(&saverx, &priv->rx_ring[wr_id], sizeof(saverx)); 244 /* 245 * If we can't allocate a new RX buffer, dump 246 * this packet and reuse the old buffer. 247 */ 248 if (unlikely(!ipoib_alloc_rx_mb(priv, wr_id))) { 249 memcpy(&priv->rx_ring[wr_id], &saverx, sizeof(saverx)); 250 if_inc_counter(dev, IFCOUNTER_IQDROPS, 1); 251 goto repost; 252 } 253 254 ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", 255 wc->byte_len, wc->slid); 256 257 ipoib_dma_unmap_rx(priv, &saverx); 258 ipoib_dma_mb(priv, mb, wc->byte_len); 259 260 if_inc_counter(dev, IFCOUNTER_IPACKETS, 1); 261 if_inc_counter(dev, IFCOUNTER_IBYTES, mb->m_pkthdr.len); 262 mb->m_pkthdr.rcvif = dev; 263 m_adj(mb, sizeof(struct ib_grh) - INFINIBAND_ALEN); 264 eh = mtod(mb, struct ipoib_header *); 265 bzero(eh->hwaddr, 4); /* Zero the queue pair, only dgid is in grh */ 266 267 if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->wc_flags & IB_WC_IP_CSUM_OK)) 268 mb->m_pkthdr.csum_flags = CSUM_IP_CHECKED | CSUM_IP_VALID; 269 270 dev->if_input(dev, mb); 271 272 repost: 273 if (unlikely(ipoib_ib_post_receive(priv, wr_id))) 274 ipoib_warn(priv, "ipoib_ib_post_receive failed " 275 "for buf %d\n", wr_id); 276 } 277 278 int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req, int max) 279 { 280 struct mbuf *mb = tx_req->mb; 281 u64 *mapping = tx_req->mapping; 282 struct mbuf *m, *p; 283 int error; 284 int i; 285 286 for (m = mb, p = NULL, i = 0; m != NULL; p = m, m = m->m_next, i++) { 287 if (m->m_len != 0) 288 continue; 289 if (p == NULL) 290 panic("ipoib_dma_map_tx: First mbuf empty\n"); 291 p->m_next = m_free(m); 292 m = p; 293 i--; 294 } 295 i--; 296 if (i >= max) { 297 tx_req->mb = mb = m_defrag(mb, M_NOWAIT); 298 if (mb == NULL) 299 return -EIO; 300 for (m = mb, i = 0; m != NULL; m = m->m_next, i++); 301 if (i >= max) 302 return -EIO; 303 } 304 error = 0; 305 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) { 306 mapping[i] = ib_dma_map_single(ca, mtod(m, void *), 307 m->m_len, DMA_TO_DEVICE); 308 if (unlikely(ib_dma_mapping_error(ca, mapping[i]))) { 309 error = -EIO; 310 break; 311 } 312 } 313 if (error) { 314 int end; 315 316 end = i; 317 for (m = mb, i = 0; i < end; m = m->m_next, i++) 318 ib_dma_unmap_single(ca, mapping[i], m->m_len, 319 DMA_TO_DEVICE); 320 } 321 return error; 322 } 323 324 void ipoib_dma_unmap_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req) 325 { 326 struct mbuf *mb = tx_req->mb; 327 u64 *mapping = tx_req->mapping; 328 struct mbuf *m; 329 int i; 330 331 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) 332 ib_dma_unmap_single(ca, mapping[i], m->m_len, DMA_TO_DEVICE); 333 } 334 335 static void ipoib_ib_handle_tx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc) 336 { 337 struct ifnet *dev = priv->dev; 338 unsigned int wr_id = wc->wr_id; 339 struct ipoib_tx_buf *tx_req; 340 341 ipoib_dbg_data(priv, "send completion: id %d, status: %d\n", 342 wr_id, wc->status); 343 344 if (unlikely(wr_id >= ipoib_sendq_size)) { 345 ipoib_warn(priv, "send completion event with wrid %d (> %d)\n", 346 wr_id, ipoib_sendq_size); 347 return; 348 } 349 350 tx_req = &priv->tx_ring[wr_id]; 351 352 ipoib_dma_unmap_tx(priv->ca, tx_req); 353 354 if_inc_counter(dev, IFCOUNTER_OPACKETS, 1); 355 356 m_freem(tx_req->mb); 357 358 ++priv->tx_tail; 359 if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && 360 (dev->if_drv_flags & IFF_DRV_OACTIVE) && 361 test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 362 dev->if_drv_flags &= ~IFF_DRV_OACTIVE; 363 364 if (wc->status != IB_WC_SUCCESS && 365 wc->status != IB_WC_WR_FLUSH_ERR) 366 ipoib_warn(priv, "failed send event " 367 "(status=%d, wrid=%d vend_err %x)\n", 368 wc->status, wr_id, wc->vendor_err); 369 } 370 371 int 372 ipoib_poll_tx(struct ipoib_dev_priv *priv, bool do_start) 373 { 374 int n, i; 375 376 n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc); 377 for (i = 0; i < n; ++i) { 378 struct ib_wc *wc = priv->send_wc + i; 379 if (wc->wr_id & IPOIB_OP_CM) 380 ipoib_cm_handle_tx_wc(priv, wc); 381 else 382 ipoib_ib_handle_tx_wc(priv, wc); 383 } 384 385 if (do_start && n != 0) 386 ipoib_start_locked(priv->dev, priv); 387 388 return n == MAX_SEND_CQE; 389 } 390 391 static void 392 ipoib_poll(struct ipoib_dev_priv *priv) 393 { 394 int n, i; 395 396 poll_more: 397 spin_lock(&priv->drain_lock); 398 for (;;) { 399 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); 400 for (i = 0; i < n; i++) { 401 struct ib_wc *wc = priv->ibwc + i; 402 403 if ((wc->wr_id & IPOIB_OP_RECV) == 0) 404 panic("ipoib_poll: Bad wr_id 0x%jX\n", 405 (intmax_t)wc->wr_id); 406 if (wc->wr_id & IPOIB_OP_CM) 407 ipoib_cm_handle_rx_wc(priv, wc); 408 else 409 ipoib_ib_handle_rx_wc(priv, wc); 410 } 411 412 if (n != IPOIB_NUM_WC) 413 break; 414 } 415 spin_unlock(&priv->drain_lock); 416 417 if (ib_req_notify_cq(priv->recv_cq, 418 IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS) > 0) 419 goto poll_more; 420 } 421 422 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) 423 { 424 struct ipoib_dev_priv *priv = dev_ptr; 425 426 ipoib_poll(priv); 427 } 428 429 static void drain_tx_cq(struct ipoib_dev_priv *priv) 430 { 431 struct ifnet *dev = priv->dev; 432 433 spin_lock(&priv->lock); 434 while (ipoib_poll_tx(priv, true)) 435 ; /* nothing */ 436 437 if (dev->if_drv_flags & IFF_DRV_OACTIVE) 438 mod_timer(&priv->poll_timer, jiffies + 1); 439 440 spin_unlock(&priv->lock); 441 } 442 443 void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr) 444 { 445 struct ipoib_dev_priv *priv = dev_ptr; 446 447 mod_timer(&priv->poll_timer, jiffies); 448 } 449 450 static inline int 451 post_send(struct ipoib_dev_priv *priv, unsigned int wr_id, 452 struct ib_ah *address, u32 qpn, struct ipoib_tx_buf *tx_req, void *head, 453 int hlen) 454 { 455 const struct ib_send_wr *bad_wr; 456 struct mbuf *mb = tx_req->mb; 457 u64 *mapping = tx_req->mapping; 458 struct mbuf *m; 459 int i; 460 461 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) { 462 priv->tx_sge[i].addr = mapping[i]; 463 priv->tx_sge[i].length = m->m_len; 464 } 465 priv->tx_wr.wr.num_sge = i; 466 priv->tx_wr.wr.wr_id = wr_id; 467 priv->tx_wr.remote_qpn = qpn; 468 priv->tx_wr.ah = address; 469 470 if (head) { 471 priv->tx_wr.mss = 0; /* XXX mb_shinfo(mb)->gso_size; */ 472 priv->tx_wr.header = head; 473 priv->tx_wr.hlen = hlen; 474 priv->tx_wr.wr.opcode = IB_WR_LSO; 475 } else 476 priv->tx_wr.wr.opcode = IB_WR_SEND; 477 478 return ib_post_send(priv->qp, &priv->tx_wr.wr, &bad_wr); 479 } 480 481 void 482 ipoib_send(struct ipoib_dev_priv *priv, struct mbuf *mb, 483 struct ipoib_ah *address, u32 qpn) 484 { 485 struct ifnet *dev = priv->dev; 486 struct ipoib_tx_buf *tx_req; 487 int hlen; 488 void *phead; 489 490 if (unlikely(priv->tx_outstanding > MAX_SEND_CQE)) 491 while (ipoib_poll_tx(priv, false)) 492 ; /* nothing */ 493 494 m_adj(mb, sizeof (struct ipoib_pseudoheader)); 495 if (0 /* XXX segment offload mb_is_gso(mb) */) { 496 /* XXX hlen = mb_transport_offset(mb) + tcp_hdrlen(mb); */ 497 phead = mtod(mb, void *); 498 if (mb->m_len < hlen) { 499 ipoib_warn(priv, "linear data too small\n"); 500 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 501 m_freem(mb); 502 return; 503 } 504 m_adj(mb, hlen); 505 } else { 506 if (unlikely(mb->m_pkthdr.len - IPOIB_ENCAP_LEN > priv->mcast_mtu)) { 507 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", 508 mb->m_pkthdr.len, priv->mcast_mtu); 509 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 510 ipoib_cm_mb_too_long(priv, mb, priv->mcast_mtu); 511 return; 512 } 513 phead = NULL; 514 hlen = 0; 515 } 516 517 ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n", 518 mb->m_pkthdr.len, address, qpn); 519 520 /* 521 * We put the mb into the tx_ring _before_ we call post_send() 522 * because it's entirely possible that the completion handler will 523 * run before we execute anything after the post_send(). That 524 * means we have to make sure everything is properly recorded and 525 * our state is consistent before we call post_send(). 526 */ 527 tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)]; 528 tx_req->mb = mb; 529 if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req, IPOIB_UD_TX_SG))) { 530 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 531 if (tx_req->mb) 532 m_freem(tx_req->mb); 533 return; 534 } 535 536 if (mb->m_pkthdr.csum_flags & (CSUM_IP|CSUM_TCP|CSUM_UDP)) 537 priv->tx_wr.wr.send_flags |= IB_SEND_IP_CSUM; 538 else 539 priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM; 540 541 if (++priv->tx_outstanding == ipoib_sendq_size) { 542 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); 543 if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP)) 544 ipoib_warn(priv, "request notify on send CQ failed\n"); 545 dev->if_drv_flags |= IFF_DRV_OACTIVE; 546 } 547 548 if (unlikely(post_send(priv, 549 priv->tx_head & (ipoib_sendq_size - 1), address->ah, qpn, 550 tx_req, phead, hlen))) { 551 ipoib_warn(priv, "post_send failed\n"); 552 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 553 --priv->tx_outstanding; 554 ipoib_dma_unmap_tx(priv->ca, tx_req); 555 m_freem(mb); 556 if (dev->if_drv_flags & IFF_DRV_OACTIVE) 557 dev->if_drv_flags &= ~IFF_DRV_OACTIVE; 558 } else { 559 address->last_send = priv->tx_head; 560 ++priv->tx_head; 561 } 562 } 563 564 static void __ipoib_reap_ah(struct ipoib_dev_priv *priv) 565 { 566 struct ipoib_ah *ah, *tah; 567 LIST_HEAD(remove_list); 568 unsigned long flags; 569 570 spin_lock_irqsave(&priv->lock, flags); 571 572 list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) 573 if ((int) priv->tx_tail - (int) ah->last_send >= 0) { 574 list_del(&ah->list); 575 ib_destroy_ah(ah->ah, 0); 576 kfree(ah); 577 } 578 579 spin_unlock_irqrestore(&priv->lock, flags); 580 } 581 582 void ipoib_reap_ah(struct work_struct *work) 583 { 584 struct ipoib_dev_priv *priv = 585 container_of(work, struct ipoib_dev_priv, ah_reap_task.work); 586 587 __ipoib_reap_ah(priv); 588 589 if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) 590 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, 591 HZ); 592 } 593 594 static void ipoib_ah_dev_cleanup(struct ipoib_dev_priv *priv) 595 { 596 unsigned long begin; 597 598 begin = jiffies; 599 600 while (!list_empty(&priv->dead_ahs)) { 601 __ipoib_reap_ah(priv); 602 603 if (time_after(jiffies, begin + HZ)) { 604 ipoib_warn(priv, "timing out; will leak address handles\n"); 605 break; 606 } 607 608 msleep(1); 609 } 610 } 611 612 static void ipoib_ib_tx_timer_func(unsigned long ctx) 613 { 614 drain_tx_cq((struct ipoib_dev_priv *)ctx); 615 } 616 617 int ipoib_ib_dev_open(struct ipoib_dev_priv *priv) 618 { 619 int ret; 620 621 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) { 622 ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey); 623 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 624 return -1; 625 } 626 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 627 628 ret = ipoib_init_qp(priv); 629 if (ret) { 630 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); 631 return -1; 632 } 633 634 ret = ipoib_ib_post_receives(priv); 635 if (ret) { 636 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); 637 ipoib_ib_dev_stop(priv, 1); 638 return -1; 639 } 640 641 ret = ipoib_cm_dev_open(priv); 642 if (ret) { 643 ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret); 644 ipoib_ib_dev_stop(priv, 1); 645 return -1; 646 } 647 648 clear_bit(IPOIB_STOP_REAPER, &priv->flags); 649 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ); 650 651 set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); 652 653 return 0; 654 } 655 656 static void ipoib_pkey_dev_check_presence(struct ipoib_dev_priv *priv) 657 { 658 u16 pkey_index = 0; 659 660 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) 661 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 662 else 663 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 664 } 665 666 int ipoib_ib_dev_up(struct ipoib_dev_priv *priv) 667 { 668 669 ipoib_pkey_dev_check_presence(priv); 670 671 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 672 ipoib_dbg(priv, "PKEY is not assigned.\n"); 673 return 0; 674 } 675 676 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 677 678 return ipoib_mcast_start_thread(priv); 679 } 680 681 int ipoib_ib_dev_down(struct ipoib_dev_priv *priv, int flush) 682 { 683 684 ipoib_dbg(priv, "downing ib_dev\n"); 685 686 clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 687 if_link_state_change(priv->dev, LINK_STATE_DOWN); 688 689 /* Shutdown the P_Key thread if still active */ 690 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 691 mutex_lock(&pkey_mutex); 692 set_bit(IPOIB_PKEY_STOP, &priv->flags); 693 cancel_delayed_work(&priv->pkey_poll_task); 694 mutex_unlock(&pkey_mutex); 695 if (flush) 696 flush_workqueue(ipoib_workqueue); 697 } 698 699 ipoib_mcast_stop_thread(priv, flush); 700 ipoib_mcast_dev_flush(priv); 701 702 ipoib_flush_paths(priv); 703 704 return 0; 705 } 706 707 static int recvs_pending(struct ipoib_dev_priv *priv) 708 { 709 int pending = 0; 710 int i; 711 712 for (i = 0; i < ipoib_recvq_size; ++i) 713 if (priv->rx_ring[i].mb) 714 ++pending; 715 716 return pending; 717 } 718 719 static void check_qp_movement_and_print(struct ipoib_dev_priv *priv, 720 struct ib_qp *qp, 721 enum ib_qp_state new_state) 722 { 723 struct ib_qp_attr qp_attr; 724 struct ib_qp_init_attr query_init_attr; 725 int ret; 726 727 ret = ib_query_qp(qp, &qp_attr, IB_QP_STATE, &query_init_attr); 728 if (ret) { 729 ipoib_warn(priv, "%s: Failed to query QP (%d)\n", __func__, ret); 730 return; 731 } 732 733 /* print according to the new-state and the previous state */ 734 if (new_state == IB_QPS_ERR && qp_attr.qp_state == IB_QPS_RESET) { 735 ipoib_dbg(priv, "Failed to modify QP %d->%d, acceptable\n", 736 qp_attr.qp_state, new_state); 737 } else { 738 ipoib_warn(priv, "Failed to modify QP %d->%d\n", 739 qp_attr.qp_state, new_state); 740 } 741 } 742 743 void ipoib_drain_cq(struct ipoib_dev_priv *priv) 744 { 745 int i, n; 746 747 spin_lock(&priv->drain_lock); 748 do { 749 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); 750 for (i = 0; i < n; ++i) { 751 /* 752 * Convert any successful completions to flush 753 * errors to avoid passing packets up the 754 * stack after bringing the device down. 755 */ 756 if (priv->ibwc[i].status == IB_WC_SUCCESS) 757 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; 758 759 if ((priv->ibwc[i].wr_id & IPOIB_OP_RECV) == 0) 760 panic("ipoib_drain_cq: Bad wrid 0x%jX\n", 761 (intmax_t)priv->ibwc[i].wr_id); 762 if (priv->ibwc[i].wr_id & IPOIB_OP_CM) 763 ipoib_cm_handle_rx_wc(priv, priv->ibwc + i); 764 else 765 ipoib_ib_handle_rx_wc(priv, priv->ibwc + i); 766 } 767 } while (n == IPOIB_NUM_WC); 768 spin_unlock(&priv->drain_lock); 769 770 spin_lock(&priv->lock); 771 while (ipoib_poll_tx(priv, true)) 772 ; /* nothing */ 773 774 spin_unlock(&priv->lock); 775 } 776 777 int ipoib_ib_dev_stop(struct ipoib_dev_priv *priv, int flush) 778 { 779 struct ib_qp_attr qp_attr; 780 unsigned long begin; 781 struct ipoib_tx_buf *tx_req; 782 int i; 783 784 clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); 785 786 ipoib_cm_dev_stop(priv); 787 788 /* 789 * Move our QP to the error state and then reinitialize in 790 * when all work requests have completed or have been flushed. 791 */ 792 qp_attr.qp_state = IB_QPS_ERR; 793 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 794 check_qp_movement_and_print(priv, priv->qp, IB_QPS_ERR); 795 796 /* Wait for all sends and receives to complete */ 797 begin = jiffies; 798 799 while (priv->tx_head != priv->tx_tail || recvs_pending(priv)) { 800 if (time_after(jiffies, begin + 5 * HZ)) { 801 ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", 802 priv->tx_head - priv->tx_tail, recvs_pending(priv)); 803 804 /* 805 * assume the HW is wedged and just free up 806 * all our pending work requests. 807 */ 808 while ((int) priv->tx_tail - (int) priv->tx_head < 0) { 809 tx_req = &priv->tx_ring[priv->tx_tail & 810 (ipoib_sendq_size - 1)]; 811 ipoib_dma_unmap_tx(priv->ca, tx_req); 812 m_freem(tx_req->mb); 813 ++priv->tx_tail; 814 --priv->tx_outstanding; 815 } 816 817 for (i = 0; i < ipoib_recvq_size; ++i) { 818 struct ipoib_rx_buf *rx_req; 819 820 rx_req = &priv->rx_ring[i]; 821 if (!rx_req->mb) 822 continue; 823 ipoib_dma_unmap_rx(priv, &priv->rx_ring[i]); 824 m_freem(rx_req->mb); 825 rx_req->mb = NULL; 826 } 827 828 goto timeout; 829 } 830 831 ipoib_drain_cq(priv); 832 833 msleep(1); 834 } 835 836 ipoib_dbg(priv, "All sends and receives done.\n"); 837 838 timeout: 839 del_timer_sync(&priv->poll_timer); 840 qp_attr.qp_state = IB_QPS_RESET; 841 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 842 ipoib_warn(priv, "Failed to modify QP to RESET state\n"); 843 844 /* Wait for all AHs to be reaped */ 845 set_bit(IPOIB_STOP_REAPER, &priv->flags); 846 cancel_delayed_work(&priv->ah_reap_task); 847 if (flush) 848 flush_workqueue(ipoib_workqueue); 849 850 ipoib_ah_dev_cleanup(priv); 851 852 ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP); 853 854 return 0; 855 } 856 857 int ipoib_ib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port) 858 { 859 struct ifnet *dev = priv->dev; 860 861 priv->ca = ca; 862 priv->port = port; 863 priv->qp = NULL; 864 865 if (ipoib_transport_dev_init(priv, ca)) { 866 printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); 867 return -ENODEV; 868 } 869 870 setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func, 871 (unsigned long) priv); 872 873 if (dev->if_flags & IFF_UP) { 874 if (ipoib_ib_dev_open(priv)) { 875 ipoib_transport_dev_cleanup(priv); 876 return -ENODEV; 877 } 878 } 879 880 return 0; 881 } 882 883 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, 884 enum ipoib_flush_level level) 885 { 886 struct ipoib_dev_priv *cpriv; 887 u16 new_index; 888 889 mutex_lock(&priv->vlan_mutex); 890 891 /* 892 * Flush any child interfaces too -- they might be up even if 893 * the parent is down. 894 */ 895 list_for_each_entry(cpriv, &priv->child_intfs, list) 896 __ipoib_ib_dev_flush(cpriv, level); 897 898 mutex_unlock(&priv->vlan_mutex); 899 900 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) { 901 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); 902 return; 903 } 904 905 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 906 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); 907 return; 908 } 909 910 if (level == IPOIB_FLUSH_HEAVY) { 911 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) { 912 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 913 ipoib_ib_dev_down(priv, 0); 914 ipoib_ib_dev_stop(priv, 0); 915 if (ipoib_pkey_dev_delay_open(priv)) 916 return; 917 } 918 919 /* restart QP only if P_Key index is changed */ 920 if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) && 921 new_index == priv->pkey_index) { 922 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); 923 return; 924 } 925 priv->pkey_index = new_index; 926 } 927 928 if (level == IPOIB_FLUSH_LIGHT) { 929 ipoib_mark_paths_invalid(priv); 930 ipoib_mcast_dev_flush(priv); 931 } 932 933 if (level >= IPOIB_FLUSH_NORMAL) 934 ipoib_ib_dev_down(priv, 0); 935 936 if (level == IPOIB_FLUSH_HEAVY) { 937 ipoib_ib_dev_stop(priv, 0); 938 ipoib_ib_dev_open(priv); 939 } 940 941 /* 942 * The device could have been brought down between the start and when 943 * we get here, don't bring it back up if it's not configured up 944 */ 945 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 946 if (level >= IPOIB_FLUSH_NORMAL) 947 ipoib_ib_dev_up(priv); 948 ipoib_mcast_restart_task(&priv->restart_task); 949 } 950 } 951 952 void ipoib_ib_dev_flush_light(struct work_struct *work) 953 { 954 struct ipoib_dev_priv *priv = 955 container_of(work, struct ipoib_dev_priv, flush_light); 956 957 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT); 958 } 959 960 void ipoib_ib_dev_flush_normal(struct work_struct *work) 961 { 962 struct ipoib_dev_priv *priv = 963 container_of(work, struct ipoib_dev_priv, flush_normal); 964 965 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL); 966 } 967 968 void ipoib_ib_dev_flush_heavy(struct work_struct *work) 969 { 970 struct ipoib_dev_priv *priv = 971 container_of(work, struct ipoib_dev_priv, flush_heavy); 972 973 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY); 974 } 975 976 void ipoib_ib_dev_cleanup(struct ipoib_dev_priv *priv) 977 { 978 979 ipoib_dbg(priv, "cleaning up ib_dev\n"); 980 981 ipoib_mcast_stop_thread(priv, 1); 982 ipoib_mcast_dev_flush(priv); 983 984 ipoib_ah_dev_cleanup(priv); 985 ipoib_transport_dev_cleanup(priv); 986 } 987 988 /* 989 * Delayed P_Key Assigment Interim Support 990 * 991 * The following is initial implementation of delayed P_Key assigment 992 * mechanism. It is using the same approach implemented for the multicast 993 * group join. The single goal of this implementation is to quickly address 994 * Bug #2507. This implementation will probably be removed when the P_Key 995 * change async notification is available. 996 */ 997 998 void ipoib_pkey_poll(struct work_struct *work) 999 { 1000 struct ipoib_dev_priv *priv = 1001 container_of(work, struct ipoib_dev_priv, pkey_poll_task.work); 1002 1003 ipoib_pkey_dev_check_presence(priv); 1004 1005 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) 1006 ipoib_open(priv); 1007 else { 1008 mutex_lock(&pkey_mutex); 1009 if (!test_bit(IPOIB_PKEY_STOP, &priv->flags)) 1010 queue_delayed_work(ipoib_workqueue, 1011 &priv->pkey_poll_task, 1012 HZ); 1013 mutex_unlock(&pkey_mutex); 1014 } 1015 } 1016 1017 int ipoib_pkey_dev_delay_open(struct ipoib_dev_priv *priv) 1018 { 1019 1020 /* Look for the interface pkey value in the IB Port P_Key table and */ 1021 /* set the interface pkey assigment flag */ 1022 ipoib_pkey_dev_check_presence(priv); 1023 1024 /* P_Key value not assigned yet - start polling */ 1025 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 1026 mutex_lock(&pkey_mutex); 1027 clear_bit(IPOIB_PKEY_STOP, &priv->flags); 1028 queue_delayed_work(ipoib_workqueue, 1029 &priv->pkey_poll_task, 1030 HZ); 1031 mutex_unlock(&pkey_mutex); 1032 return 1; 1033 } 1034 1035 return 0; 1036 }
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