1 /* 2 * Copyright (c) 2006 Mellanox Technologies. All rights reserved 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 * 32 * $Id$ 33 */ 34 35 #include <rdma/ib_cm.h> 36 #include <rdma/ib_cache.h> 37 #include <net/dst.h> 38 #include <net/icmp.h> 39 #include <linux/icmpv6.h> 40 41 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA 42 static int data_debug_level; 43 44 module_param_named(cm_data_debug_level, data_debug_level, int, 0644); 45 MODULE_PARM_DESC(cm_data_debug_level, 46 "Enable data path debug tracing for connected mode if > 0"); 47 #endif 48 49 #include "ipoib.h" 50 51 #define IPOIB_CM_IETF_ID 0x1000000000000000ULL 52 53 #define IPOIB_CM_RX_UPDATE_TIME (256 * HZ) 54 #define IPOIB_CM_RX_TIMEOUT (2 * 256 * HZ) 55 #define IPOIB_CM_RX_DELAY (3 * 256 * HZ) 56 #define IPOIB_CM_RX_UPDATE_MASK (0x3) 57 58 struct ipoib_cm_id { 59 struct ib_cm_id *id; 60 int flags; 61 u32 remote_qpn; 62 u32 remote_mtu; 63 }; 64 65 static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, 66 struct ib_cm_event *event); 67 68 static void ipoib_cm_dma_unmap_rx(struct ipoib_dev_priv *priv, int frags, 69 u64 mapping[IPOIB_CM_RX_SG]) 70 { 71 int i; 72 73 ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_CM_HEAD_SIZE, DMA_FROM_DEVICE); 74 75 for (i = 0; i < frags; ++i) 76 ib_dma_unmap_single(priv->ca, mapping[i + 1], PAGE_SIZE, DMA_FROM_DEVICE); 77 } 78 79 static int ipoib_cm_post_receive(struct net_device *dev, int id) 80 { 81 struct ipoib_dev_priv *priv = netdev_priv(dev); 82 struct ib_recv_wr *bad_wr; 83 int i, ret; 84 85 priv->cm.rx_wr.wr_id = id | IPOIB_CM_OP_SRQ; 86 87 for (i = 0; i < IPOIB_CM_RX_SG; ++i) 88 priv->cm.rx_sge[i].addr = priv->cm.srq_ring[id].mapping[i]; 89 90 ret = ib_post_srq_recv(priv->cm.srq, &priv->cm.rx_wr, &bad_wr); 91 if (unlikely(ret)) { 92 ipoib_warn(priv, "post srq failed for buf %d (%d)\n", id, ret); 93 ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1, 94 priv->cm.srq_ring[id].mapping); 95 dev_kfree_skb_any(priv->cm.srq_ring[id].skb); 96 priv->cm.srq_ring[id].skb = NULL; 97 } 98 99 return ret; 100 } 101 102 static struct sk_buff *ipoib_cm_alloc_rx_skb(struct net_device *dev, int id, int frags, 103 u64 mapping[IPOIB_CM_RX_SG]) 104 { 105 struct ipoib_dev_priv *priv = netdev_priv(dev); 106 struct sk_buff *skb; 107 int i; 108 109 skb = dev_alloc_skb(IPOIB_CM_HEAD_SIZE + 12); 110 if (unlikely(!skb)) 111 return NULL; 112 113 /* 114 * IPoIB adds a 4 byte header. So we need 12 more bytes to align the 115 * IP header to a multiple of 16. 116 */ 117 skb_reserve(skb, 12); 118 119 mapping[0] = ib_dma_map_single(priv->ca, skb->data, IPOIB_CM_HEAD_SIZE, 120 DMA_FROM_DEVICE); 121 if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0]))) { 122 dev_kfree_skb_any(skb); 123 return NULL; 124 } 125 126 for (i = 0; i < frags; i++) { 127 struct page *page = alloc_page(GFP_ATOMIC); 128 129 if (!page) 130 goto partial_error; 131 skb_fill_page_desc(skb, i, page, 0, PAGE_SIZE); 132 133 mapping[i + 1] = ib_dma_map_page(priv->ca, skb_shinfo(skb)->frags[i].page, 134 0, PAGE_SIZE, DMA_TO_DEVICE); 135 if (unlikely(ib_dma_mapping_error(priv->ca, mapping[i + 1]))) 136 goto partial_error; 137 } 138 139 priv->cm.srq_ring[id].skb = skb; 140 return skb; 141 142 partial_error: 143 144 ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_CM_HEAD_SIZE, DMA_FROM_DEVICE); 145 146 for (; i >= 0; --i) 147 ib_dma_unmap_single(priv->ca, mapping[i + 1], PAGE_SIZE, DMA_FROM_DEVICE); 148 149 dev_kfree_skb_any(skb); 150 return NULL; 151 } 152 153 static struct ib_qp *ipoib_cm_create_rx_qp(struct net_device *dev, 154 struct ipoib_cm_rx *p) 155 { 156 struct ipoib_dev_priv *priv = netdev_priv(dev); 157 struct ib_qp_init_attr attr = { 158 .send_cq = priv->cq, /* does not matter, we never send anything */ 159 .recv_cq = priv->cq, 160 .srq = priv->cm.srq, 161 .cap.max_send_wr = 1, /* FIXME: 0 Seems not to work */ 162 .cap.max_send_sge = 1, /* FIXME: 0 Seems not to work */ 163 .sq_sig_type = IB_SIGNAL_ALL_WR, 164 .qp_type = IB_QPT_RC, 165 .qp_context = p, 166 }; 167 return ib_create_qp(priv->pd, &attr); 168 } 169 170 static int ipoib_cm_modify_rx_qp(struct net_device *dev, 171 struct ib_cm_id *cm_id, struct ib_qp *qp, 172 unsigned psn) 173 { 174 struct ipoib_dev_priv *priv = netdev_priv(dev); 175 struct ib_qp_attr qp_attr; 176 int qp_attr_mask, ret; 177 178 qp_attr.qp_state = IB_QPS_INIT; 179 ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); 180 if (ret) { 181 ipoib_warn(priv, "failed to init QP attr for INIT: %d\n", ret); 182 return ret; 183 } 184 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 185 if (ret) { 186 ipoib_warn(priv, "failed to modify QP to INIT: %d\n", ret); 187 return ret; 188 } 189 qp_attr.qp_state = IB_QPS_RTR; 190 ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); 191 if (ret) { 192 ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); 193 return ret; 194 } 195 qp_attr.rq_psn = psn; 196 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 197 if (ret) { 198 ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); 199 return ret; 200 } 201 return 0; 202 } 203 204 static int ipoib_cm_send_rep(struct net_device *dev, struct ib_cm_id *cm_id, 205 struct ib_qp *qp, struct ib_cm_req_event_param *req, 206 unsigned psn) 207 { 208 struct ipoib_dev_priv *priv = netdev_priv(dev); 209 struct ipoib_cm_data data = {}; 210 struct ib_cm_rep_param rep = {}; 211 212 data.qpn = cpu_to_be32(priv->qp->qp_num); 213 data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); 214 215 rep.private_data = &data; 216 rep.private_data_len = sizeof data; 217 rep.flow_control = 0; 218 rep.rnr_retry_count = req->rnr_retry_count; 219 rep.target_ack_delay = 20; /* FIXME */ 220 rep.srq = 1; 221 rep.qp_num = qp->qp_num; 222 rep.starting_psn = psn; 223 return ib_send_cm_rep(cm_id, &rep); 224 } 225 226 static int ipoib_cm_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) 227 { 228 struct net_device *dev = cm_id->context; 229 struct ipoib_dev_priv *priv = netdev_priv(dev); 230 struct ipoib_cm_rx *p; 231 unsigned long flags; 232 unsigned psn; 233 int ret; 234 235 ipoib_dbg(priv, "REQ arrived\n"); 236 p = kzalloc(sizeof *p, GFP_KERNEL); 237 if (!p) 238 return -ENOMEM; 239 p->dev = dev; 240 p->id = cm_id; 241 p->qp = ipoib_cm_create_rx_qp(dev, p); 242 if (IS_ERR(p->qp)) { 243 ret = PTR_ERR(p->qp); 244 goto err_qp; 245 } 246 247 psn = random32() & 0xffffff; 248 ret = ipoib_cm_modify_rx_qp(dev, cm_id, p->qp, psn); 249 if (ret) 250 goto err_modify; 251 252 ret = ipoib_cm_send_rep(dev, cm_id, p->qp, &event->param.req_rcvd, psn); 253 if (ret) { 254 ipoib_warn(priv, "failed to send REP: %d\n", ret); 255 goto err_rep; 256 } 257 258 cm_id->context = p; 259 p->jiffies = jiffies; 260 spin_lock_irqsave(&priv->lock, flags); 261 list_add(&p->list, &priv->cm.passive_ids); 262 spin_unlock_irqrestore(&priv->lock, flags); 263 queue_delayed_work(ipoib_workqueue, 264 &priv->cm.stale_task, IPOIB_CM_RX_DELAY); 265 return 0; 266 267 err_rep: 268 err_modify: 269 ib_destroy_qp(p->qp); 270 err_qp: 271 kfree(p); 272 return ret; 273 } 274 275 static int ipoib_cm_rx_handler(struct ib_cm_id *cm_id, 276 struct ib_cm_event *event) 277 { 278 struct ipoib_cm_rx *p; 279 struct ipoib_dev_priv *priv; 280 unsigned long flags; 281 int ret; 282 283 switch (event->event) { 284 case IB_CM_REQ_RECEIVED: 285 return ipoib_cm_req_handler(cm_id, event); 286 case IB_CM_DREQ_RECEIVED: 287 p = cm_id->context; 288 ib_send_cm_drep(cm_id, NULL, 0); 289 /* Fall through */ 290 case IB_CM_REJ_RECEIVED: 291 p = cm_id->context; 292 priv = netdev_priv(p->dev); 293 spin_lock_irqsave(&priv->lock, flags); 294 if (list_empty(&p->list)) 295 ret = 0; /* Connection is going away already. */ 296 else { 297 list_del_init(&p->list); 298 ret = -ECONNRESET; 299 } 300 spin_unlock_irqrestore(&priv->lock, flags); 301 if (ret) { 302 ib_destroy_qp(p->qp); 303 kfree(p); 304 return ret; 305 } 306 return 0; 307 default: 308 return 0; 309 } 310 } 311 /* Adjust length of skb with fragments to match received data */ 312 static void skb_put_frags(struct sk_buff *skb, unsigned int hdr_space, 313 unsigned int length, struct sk_buff *toskb) 314 { 315 int i, num_frags; 316 unsigned int size; 317 318 /* put header into skb */ 319 size = min(length, hdr_space); 320 skb->tail += size; 321 skb->len += size; 322 length -= size; 323 324 num_frags = skb_shinfo(skb)->nr_frags; 325 for (i = 0; i < num_frags; i++) { 326 skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 327 328 if (length == 0) { 329 /* don't need this page */ 330 skb_fill_page_desc(toskb, i, frag->page, 0, PAGE_SIZE); 331 --skb_shinfo(skb)->nr_frags; 332 } else { 333 size = min(length, (unsigned) PAGE_SIZE); 334 335 frag->size = size; 336 skb->data_len += size; 337 skb->truesize += size; 338 skb->len += size; 339 length -= size; 340 } 341 } 342 } 343 344 void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) 345 { 346 struct ipoib_dev_priv *priv = netdev_priv(dev); 347 unsigned int wr_id = wc->wr_id & ~IPOIB_CM_OP_SRQ; 348 struct sk_buff *skb, *newskb; 349 struct ipoib_cm_rx *p; 350 unsigned long flags; 351 u64 mapping[IPOIB_CM_RX_SG]; 352 int frags; 353 354 ipoib_dbg_data(priv, "cm recv completion: id %d, op %d, status: %d\n", 355 wr_id, wc->opcode, wc->status); 356 357 if (unlikely(wr_id >= ipoib_recvq_size)) { 358 ipoib_warn(priv, "cm recv completion event with wrid %d (> %d)\n", 359 wr_id, ipoib_recvq_size); 360 return; 361 } 362 363 skb = priv->cm.srq_ring[wr_id].skb; 364 365 if (unlikely(wc->status != IB_WC_SUCCESS)) { 366 ipoib_dbg(priv, "cm recv error " 367 "(status=%d, wrid=%d vend_err %x)\n", 368 wc->status, wr_id, wc->vendor_err); 369 ++priv->stats.rx_dropped; 370 goto repost; 371 } 372 373 if (!likely(wr_id & IPOIB_CM_RX_UPDATE_MASK)) { 374 p = wc->qp->qp_context; 375 if (time_after_eq(jiffies, p->jiffies + IPOIB_CM_RX_UPDATE_TIME)) { 376 spin_lock_irqsave(&priv->lock, flags); 377 p->jiffies = jiffies; 378 /* Move this entry to list head, but do 379 * not re-add it if it has been removed. */ 380 if (!list_empty(&p->list)) 381 list_move(&p->list, &priv->cm.passive_ids); 382 spin_unlock_irqrestore(&priv->lock, flags); 383 queue_delayed_work(ipoib_workqueue, 384 &priv->cm.stale_task, IPOIB_CM_RX_DELAY); 385 } 386 } 387 388 frags = PAGE_ALIGN(wc->byte_len - min(wc->byte_len, 389 (unsigned)IPOIB_CM_HEAD_SIZE)) / PAGE_SIZE; 390 391 newskb = ipoib_cm_alloc_rx_skb(dev, wr_id, frags, mapping); 392 if (unlikely(!newskb)) { 393 /* 394 * If we can't allocate a new RX buffer, dump 395 * this packet and reuse the old buffer. 396 */ 397 ipoib_dbg(priv, "failed to allocate receive buffer %d\n", wr_id); 398 ++priv->stats.rx_dropped; 399 goto repost; 400 } 401 402 ipoib_cm_dma_unmap_rx(priv, frags, priv->cm.srq_ring[wr_id].mapping); 403 memcpy(priv->cm.srq_ring[wr_id].mapping, mapping, (frags + 1) * sizeof *mapping); 404 405 ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", 406 wc->byte_len, wc->slid); 407 408 skb_put_frags(skb, IPOIB_CM_HEAD_SIZE, wc->byte_len, newskb); 409 410 skb->protocol = ((struct ipoib_header *) skb->data)->proto; 411 skb->mac.raw = skb->data; 412 skb_pull(skb, IPOIB_ENCAP_LEN); 413 414 dev->last_rx = jiffies; 415 ++priv->stats.rx_packets; 416 priv->stats.rx_bytes += skb->len; 417 418 skb->dev = dev; 419 /* XXX get correct PACKET_ type here */ 420 skb->pkt_type = PACKET_HOST; 421 netif_rx_ni(skb); 422 423 repost: 424 if (unlikely(ipoib_cm_post_receive(dev, wr_id))) 425 ipoib_warn(priv, "ipoib_cm_post_receive failed " 426 "for buf %d\n", wr_id); 427 } 428 429 static inline int post_send(struct ipoib_dev_priv *priv, 430 struct ipoib_cm_tx *tx, 431 unsigned int wr_id, 432 u64 addr, int len) 433 { 434 struct ib_send_wr *bad_wr; 435 436 priv->tx_sge.addr = addr; 437 priv->tx_sge.length = len; 438 439 priv->tx_wr.wr_id = wr_id; 440 441 return ib_post_send(tx->qp, &priv->tx_wr, &bad_wr); 442 } 443 444 void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx) 445 { 446 struct ipoib_dev_priv *priv = netdev_priv(dev); 447 struct ipoib_tx_buf *tx_req; 448 u64 addr; 449 450 if (unlikely(skb->len > tx->mtu)) { 451 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", 452 skb->len, tx->mtu); 453 ++priv->stats.tx_dropped; 454 ++priv->stats.tx_errors; 455 ipoib_cm_skb_too_long(dev, skb, tx->mtu - INFINIBAND_ALEN); 456 return; 457 } 458 459 ipoib_dbg_data(priv, "sending packet: head 0x%x length %d connection 0x%x\n", 460 tx->tx_head, skb->len, tx->qp->qp_num); 461 462 /* 463 * We put the skb into the tx_ring _before_ we call post_send() 464 * because it's entirely possible that the completion handler will 465 * run before we execute anything after the post_send(). That 466 * means we have to make sure everything is properly recorded and 467 * our state is consistent before we call post_send(). 468 */ 469 tx_req = &tx->tx_ring[tx->tx_head & (ipoib_sendq_size - 1)]; 470 tx_req->skb = skb; 471 addr = ib_dma_map_single(priv->ca, skb->data, skb->len, DMA_TO_DEVICE); 472 if (unlikely(ib_dma_mapping_error(priv->ca, addr))) { 473 ++priv->stats.tx_errors; 474 dev_kfree_skb_any(skb); 475 return; 476 } 477 478 tx_req->mapping = addr; 479 480 if (unlikely(post_send(priv, tx, tx->tx_head & (ipoib_sendq_size - 1), 481 addr, skb->len))) { 482 ipoib_warn(priv, "post_send failed\n"); 483 ++priv->stats.tx_errors; 484 ib_dma_unmap_single(priv->ca, addr, skb->len, DMA_TO_DEVICE); 485 dev_kfree_skb_any(skb); 486 } else { 487 dev->trans_start = jiffies; 488 ++tx->tx_head; 489 490 if (tx->tx_head - tx->tx_tail == ipoib_sendq_size) { 491 ipoib_dbg(priv, "TX ring 0x%x full, stopping kernel net queue\n", 492 tx->qp->qp_num); 493 netif_stop_queue(dev); 494 set_bit(IPOIB_FLAG_NETIF_STOPPED, &tx->flags); 495 } 496 } 497 } 498 499 static void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ipoib_cm_tx *tx, 500 struct ib_wc *wc) 501 { 502 struct ipoib_dev_priv *priv = netdev_priv(dev); 503 unsigned int wr_id = wc->wr_id; 504 struct ipoib_tx_buf *tx_req; 505 unsigned long flags; 506 507 ipoib_dbg_data(priv, "cm send completion: id %d, op %d, status: %d\n", 508 wr_id, wc->opcode, wc->status); 509 510 if (unlikely(wr_id >= ipoib_sendq_size)) { 511 ipoib_warn(priv, "cm send completion event with wrid %d (> %d)\n", 512 wr_id, ipoib_sendq_size); 513 return; 514 } 515 516 tx_req = &tx->tx_ring[wr_id]; 517 518 ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len, DMA_TO_DEVICE); 519 520 /* FIXME: is this right? Shouldn't we only increment on success? */ 521 ++priv->stats.tx_packets; 522 priv->stats.tx_bytes += tx_req->skb->len; 523 524 dev_kfree_skb_any(tx_req->skb); 525 526 spin_lock_irqsave(&priv->tx_lock, flags); 527 ++tx->tx_tail; 528 if (unlikely(test_bit(IPOIB_FLAG_NETIF_STOPPED, &tx->flags)) && 529 tx->tx_head - tx->tx_tail <= ipoib_sendq_size >> 1) { 530 clear_bit(IPOIB_FLAG_NETIF_STOPPED, &tx->flags); 531 netif_wake_queue(dev); 532 } 533 534 if (wc->status != IB_WC_SUCCESS && 535 wc->status != IB_WC_WR_FLUSH_ERR) { 536 struct ipoib_neigh *neigh; 537 538 ipoib_dbg(priv, "failed cm send event " 539 "(status=%d, wrid=%d vend_err %x)\n", 540 wc->status, wr_id, wc->vendor_err); 541 542 spin_lock(&priv->lock); 543 neigh = tx->neigh; 544 545 if (neigh) { 546 neigh->cm = NULL; 547 list_del(&neigh->list); 548 if (neigh->ah) 549 ipoib_put_ah(neigh->ah); 550 ipoib_neigh_free(dev, neigh); 551 552 tx->neigh = NULL; 553 } 554 555 /* queue would be re-started anyway when TX is destroyed, 556 * but it makes sense to do it ASAP here. */ 557 if (test_and_clear_bit(IPOIB_FLAG_NETIF_STOPPED, &tx->flags)) 558 netif_wake_queue(dev); 559 560 if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { 561 list_move(&tx->list, &priv->cm.reap_list); 562 queue_work(ipoib_workqueue, &priv->cm.reap_task); 563 } 564 565 clear_bit(IPOIB_FLAG_OPER_UP, &tx->flags); 566 567 spin_unlock(&priv->lock); 568 } 569 570 spin_unlock_irqrestore(&priv->tx_lock, flags); 571 } 572 573 static void ipoib_cm_tx_completion(struct ib_cq *cq, void *tx_ptr) 574 { 575 struct ipoib_cm_tx *tx = tx_ptr; 576 int n, i; 577 578 ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); 579 do { 580 n = ib_poll_cq(cq, IPOIB_NUM_WC, tx->ibwc); 581 for (i = 0; i < n; ++i) 582 ipoib_cm_handle_tx_wc(tx->dev, tx, tx->ibwc + i); 583 } while (n == IPOIB_NUM_WC); 584 } 585 586 int ipoib_cm_dev_open(struct net_device *dev) 587 { 588 struct ipoib_dev_priv *priv = netdev_priv(dev); 589 int ret; 590 591 if (!IPOIB_CM_SUPPORTED(dev->dev_addr)) 592 return 0; 593 594 priv->cm.id = ib_create_cm_id(priv->ca, ipoib_cm_rx_handler, dev); 595 if (IS_ERR(priv->cm.id)) { 596 printk(KERN_WARNING "%s: failed to create CM ID\n", priv->ca->name); 597 return IS_ERR(priv->cm.id); 598 } 599 600 ret = ib_cm_listen(priv->cm.id, cpu_to_be64(IPOIB_CM_IETF_ID | priv->qp->qp_num), 601 0, NULL); 602 if (ret) { 603 printk(KERN_WARNING "%s: failed to listen on ID 0x%llx\n", priv->ca->name, 604 IPOIB_CM_IETF_ID | priv->qp->qp_num); 605 ib_destroy_cm_id(priv->cm.id); 606 return ret; 607 } 608 return 0; 609 } 610 611 void ipoib_cm_dev_stop(struct net_device *dev) 612 { 613 struct ipoib_dev_priv *priv = netdev_priv(dev); 614 struct ipoib_cm_rx *p; 615 unsigned long flags; 616 617 if (!IPOIB_CM_SUPPORTED(dev->dev_addr)) 618 return; 619 620 ib_destroy_cm_id(priv->cm.id); 621 spin_lock_irqsave(&priv->lock, flags); 622 while (!list_empty(&priv->cm.passive_ids)) { 623 p = list_entry(priv->cm.passive_ids.next, typeof(*p), list); 624 list_del_init(&p->list); 625 spin_unlock_irqrestore(&priv->lock, flags); 626 ib_destroy_cm_id(p->id); 627 ib_destroy_qp(p->qp); 628 kfree(p); 629 spin_lock_irqsave(&priv->lock, flags); 630 } 631 spin_unlock_irqrestore(&priv->lock, flags); 632 633 cancel_delayed_work(&priv->cm.stale_task); 634 } 635 636 static int ipoib_cm_rep_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) 637 { 638 struct ipoib_cm_tx *p = cm_id->context; 639 struct ipoib_dev_priv *priv = netdev_priv(p->dev); 640 struct ipoib_cm_data *data = event->private_data; 641 struct sk_buff_head skqueue; 642 struct ib_qp_attr qp_attr; 643 int qp_attr_mask, ret; 644 struct sk_buff *skb; 645 unsigned long flags; 646 647 p->mtu = be32_to_cpu(data->mtu); 648 649 if (p->mtu < priv->dev->mtu + IPOIB_ENCAP_LEN) { 650 ipoib_warn(priv, "Rejecting connection: mtu %d < device mtu %d + 4\n", 651 p->mtu, priv->dev->mtu); 652 return -EINVAL; 653 } 654 655 qp_attr.qp_state = IB_QPS_RTR; 656 ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); 657 if (ret) { 658 ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); 659 return ret; 660 } 661 662 qp_attr.rq_psn = 0 /* FIXME */; 663 ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); 664 if (ret) { 665 ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); 666 return ret; 667 } 668 669 qp_attr.qp_state = IB_QPS_RTS; 670 ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); 671 if (ret) { 672 ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); 673 return ret; 674 } 675 ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); 676 if (ret) { 677 ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); 678 return ret; 679 } 680 681 skb_queue_head_init(&skqueue); 682 683 spin_lock_irqsave(&priv->lock, flags); 684 set_bit(IPOIB_FLAG_OPER_UP, &p->flags); 685 if (p->neigh) 686 while ((skb = __skb_dequeue(&p->neigh->queue))) 687 __skb_queue_tail(&skqueue, skb); 688 spin_unlock_irqrestore(&priv->lock, flags); 689 690 while ((skb = __skb_dequeue(&skqueue))) { 691 skb->dev = p->dev; 692 if (dev_queue_xmit(skb)) 693 ipoib_warn(priv, "dev_queue_xmit failed " 694 "to requeue packet\n"); 695 } 696 697 ret = ib_send_cm_rtu(cm_id, NULL, 0); 698 if (ret) { 699 ipoib_warn(priv, "failed to send RTU: %d\n", ret); 700 return ret; 701 } 702 return 0; 703 } 704 705 static struct ib_qp *ipoib_cm_create_tx_qp(struct net_device *dev, struct ib_cq *cq) 706 { 707 struct ipoib_dev_priv *priv = netdev_priv(dev); 708 struct ib_qp_init_attr attr = {}; 709 attr.recv_cq = priv->cq; 710 attr.srq = priv->cm.srq; 711 attr.cap.max_send_wr = ipoib_sendq_size; 712 attr.cap.max_send_sge = 1; 713 attr.sq_sig_type = IB_SIGNAL_ALL_WR; 714 attr.qp_type = IB_QPT_RC; 715 attr.send_cq = cq; 716 return ib_create_qp(priv->pd, &attr); 717 } 718 719 static int ipoib_cm_send_req(struct net_device *dev, 720 struct ib_cm_id *id, struct ib_qp *qp, 721 u32 qpn, 722 struct ib_sa_path_rec *pathrec) 723 { 724 struct ipoib_dev_priv *priv = netdev_priv(dev); 725 struct ipoib_cm_data data = {}; 726 struct ib_cm_req_param req = {}; 727 728 data.qpn = cpu_to_be32(priv->qp->qp_num); 729 data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); 730 731 req.primary_path = pathrec; 732 req.alternate_path = NULL; 733 req.service_id = cpu_to_be64(IPOIB_CM_IETF_ID | qpn); 734 req.qp_num = qp->qp_num; 735 req.qp_type = qp->qp_type; 736 req.private_data = &data; 737 req.private_data_len = sizeof data; 738 req.flow_control = 0; 739 740 req.starting_psn = 0; /* FIXME */ 741 742 /* 743 * Pick some arbitrary defaults here; we could make these 744 * module parameters if anyone cared about setting them. 745 */ 746 req.responder_resources = 4; 747 req.remote_cm_response_timeout = 20; 748 req.local_cm_response_timeout = 20; 749 req.retry_count = 0; /* RFC draft warns against retries */ 750 req.rnr_retry_count = 0; /* RFC draft warns against retries */ 751 req.max_cm_retries = 15; 752 req.srq = 1; 753 return ib_send_cm_req(id, &req); 754 } 755 756 static int ipoib_cm_modify_tx_init(struct net_device *dev, 757 struct ib_cm_id *cm_id, struct ib_qp *qp) 758 { 759 struct ipoib_dev_priv *priv = netdev_priv(dev); 760 struct ib_qp_attr qp_attr; 761 int qp_attr_mask, ret; 762 ret = ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &qp_attr.pkey_index); 763 if (ret) { 764 ipoib_warn(priv, "pkey 0x%x not in cache: %d\n", priv->pkey, ret); 765 return ret; 766 } 767 768 qp_attr.qp_state = IB_QPS_INIT; 769 qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE; 770 qp_attr.port_num = priv->port; 771 qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | IB_QP_PKEY_INDEX | IB_QP_PORT; 772 773 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); 774 if (ret) { 775 ipoib_warn(priv, "failed to modify tx QP to INIT: %d\n", ret); 776 return ret; 777 } 778 return 0; 779 } 780 781 static int ipoib_cm_tx_init(struct ipoib_cm_tx *p, u32 qpn, 782 struct ib_sa_path_rec *pathrec) 783 { 784 struct ipoib_dev_priv *priv = netdev_priv(p->dev); 785 int ret; 786 787 p->tx_ring = kzalloc(ipoib_sendq_size * sizeof *p->tx_ring, 788 GFP_KERNEL); 789 if (!p->tx_ring) { 790 ipoib_warn(priv, "failed to allocate tx ring\n"); 791 ret = -ENOMEM; 792 goto err_tx; 793 } 794 795 p->cq = ib_create_cq(priv->ca, ipoib_cm_tx_completion, NULL, p, 796 ipoib_sendq_size + 1); 797 if (IS_ERR(p->cq)) { 798 ret = PTR_ERR(p->cq); 799 ipoib_warn(priv, "failed to allocate tx cq: %d\n", ret); 800 goto err_cq; 801 } 802 803 ret = ib_req_notify_cq(p->cq, IB_CQ_NEXT_COMP); 804 if (ret) { 805 ipoib_warn(priv, "failed to request completion notification: %d\n", ret); 806 goto err_req_notify; 807 } 808 809 p->qp = ipoib_cm_create_tx_qp(p->dev, p->cq); 810 if (IS_ERR(p->qp)) { 811 ret = PTR_ERR(p->qp); 812 ipoib_warn(priv, "failed to allocate tx qp: %d\n", ret); 813 goto err_qp; 814 } 815 816 p->id = ib_create_cm_id(priv->ca, ipoib_cm_tx_handler, p); 817 if (IS_ERR(p->id)) { 818 ret = PTR_ERR(p->id); 819 ipoib_warn(priv, "failed to create tx cm id: %d\n", ret); 820 goto err_id; 821 } 822 823 ret = ipoib_cm_modify_tx_init(p->dev, p->id, p->qp); 824 if (ret) { 825 ipoib_warn(priv, "failed to modify tx qp to rtr: %d\n", ret); 826 goto err_modify; 827 } 828 829 ret = ipoib_cm_send_req(p->dev, p->id, p->qp, qpn, pathrec); 830 if (ret) { 831 ipoib_warn(priv, "failed to send cm req: %d\n", ret); 832 goto err_send_cm; 833 } 834 835 ipoib_dbg(priv, "Request connection 0x%x for gid " IPOIB_GID_FMT " qpn 0x%x\n", 836 p->qp->qp_num, IPOIB_GID_ARG(pathrec->dgid), qpn); 837 838 return 0; 839 840 err_send_cm: 841 err_modify: 842 ib_destroy_cm_id(p->id); 843 err_id: 844 p->id = NULL; 845 ib_destroy_qp(p->qp); 846 err_req_notify: 847 err_qp: 848 p->qp = NULL; 849 ib_destroy_cq(p->cq); 850 err_cq: 851 p->cq = NULL; 852 err_tx: 853 return ret; 854 } 855 856 static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p) 857 { 858 struct ipoib_dev_priv *priv = netdev_priv(p->dev); 859 struct ipoib_tx_buf *tx_req; 860 861 ipoib_dbg(priv, "Destroy active connection 0x%x head 0x%x tail 0x%x\n", 862 p->qp ? p->qp->qp_num : 0, p->tx_head, p->tx_tail); 863 864 if (p->id) 865 ib_destroy_cm_id(p->id); 866 867 if (p->qp) 868 ib_destroy_qp(p->qp); 869 870 if (p->cq) 871 ib_destroy_cq(p->cq); 872 873 if (test_bit(IPOIB_FLAG_NETIF_STOPPED, &p->flags)) 874 netif_wake_queue(p->dev); 875 876 if (p->tx_ring) { 877 while ((int) p->tx_tail - (int) p->tx_head < 0) { 878 tx_req = &p->tx_ring[p->tx_tail & (ipoib_sendq_size - 1)]; 879 ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len, 880 DMA_TO_DEVICE); 881 dev_kfree_skb_any(tx_req->skb); 882 ++p->tx_tail; 883 } 884 885 kfree(p->tx_ring); 886 } 887 888 kfree(p); 889 } 890 891 static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, 892 struct ib_cm_event *event) 893 { 894 struct ipoib_cm_tx *tx = cm_id->context; 895 struct ipoib_dev_priv *priv = netdev_priv(tx->dev); 896 struct net_device *dev = priv->dev; 897 struct ipoib_neigh *neigh; 898 unsigned long flags; 899 int ret; 900 901 switch (event->event) { 902 case IB_CM_DREQ_RECEIVED: 903 ipoib_dbg(priv, "DREQ received.\n"); 904 ib_send_cm_drep(cm_id, NULL, 0); 905 break; 906 case IB_CM_REP_RECEIVED: 907 ipoib_dbg(priv, "REP received.\n"); 908 ret = ipoib_cm_rep_handler(cm_id, event); 909 if (ret) 910 ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, 911 NULL, 0, NULL, 0); 912 break; 913 case IB_CM_REQ_ERROR: 914 case IB_CM_REJ_RECEIVED: 915 case IB_CM_TIMEWAIT_EXIT: 916 ipoib_dbg(priv, "CM error %d.\n", event->event); 917 spin_lock_irqsave(&priv->tx_lock, flags); 918 spin_lock(&priv->lock); 919 neigh = tx->neigh; 920 921 if (neigh) { 922 neigh->cm = NULL; 923 list_del(&neigh->list); 924 if (neigh->ah) 925 ipoib_put_ah(neigh->ah); 926 ipoib_neigh_free(dev, neigh); 927 928 tx->neigh = NULL; 929 } 930 931 if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { 932 list_move(&tx->list, &priv->cm.reap_list); 933 queue_work(ipoib_workqueue, &priv->cm.reap_task); 934 } 935 936 spin_unlock(&priv->lock); 937 spin_unlock_irqrestore(&priv->tx_lock, flags); 938 break; 939 default: 940 break; 941 } 942 943 return 0; 944 } 945 946 struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path, 947 struct ipoib_neigh *neigh) 948 { 949 struct ipoib_dev_priv *priv = netdev_priv(dev); 950 struct ipoib_cm_tx *tx; 951 952 tx = kzalloc(sizeof *tx, GFP_ATOMIC); 953 if (!tx) 954 return NULL; 955 956 neigh->cm = tx; 957 tx->neigh = neigh; 958 tx->path = path; 959 tx->dev = dev; 960 list_add(&tx->list, &priv->cm.start_list); 961 set_bit(IPOIB_FLAG_INITIALIZED, &tx->flags); 962 queue_work(ipoib_workqueue, &priv->cm.start_task); 963 return tx; 964 } 965 966 void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx) 967 { 968 struct ipoib_dev_priv *priv = netdev_priv(tx->dev); 969 if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { 970 list_move(&tx->list, &priv->cm.reap_list); 971 queue_work(ipoib_workqueue, &priv->cm.reap_task); 972 ipoib_dbg(priv, "Reap connection for gid " IPOIB_GID_FMT "\n", 973 IPOIB_GID_ARG(tx->neigh->dgid)); 974 tx->neigh = NULL; 975 } 976 } 977 978 static void ipoib_cm_tx_start(struct work_struct *work) 979 { 980 struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, 981 cm.start_task); 982 struct net_device *dev = priv->dev; 983 struct ipoib_neigh *neigh; 984 struct ipoib_cm_tx *p; 985 unsigned long flags; 986 int ret; 987 988 struct ib_sa_path_rec pathrec; 989 u32 qpn; 990 991 spin_lock_irqsave(&priv->tx_lock, flags); 992 spin_lock(&priv->lock); 993 while (!list_empty(&priv->cm.start_list)) { 994 p = list_entry(priv->cm.start_list.next, typeof(*p), list); 995 list_del_init(&p->list); 996 neigh = p->neigh; 997 qpn = IPOIB_QPN(neigh->neighbour->ha); 998 memcpy(&pathrec, &p->path->pathrec, sizeof pathrec); 999 spin_unlock(&priv->lock); 1000 spin_unlock_irqrestore(&priv->tx_lock, flags); 1001 ret = ipoib_cm_tx_init(p, qpn, &pathrec); 1002 spin_lock_irqsave(&priv->tx_lock, flags); 1003 spin_lock(&priv->lock); 1004 if (ret) { 1005 neigh = p->neigh; 1006 if (neigh) { 1007 neigh->cm = NULL; 1008 list_del(&neigh->list); 1009 if (neigh->ah) 1010 ipoib_put_ah(neigh->ah); 1011 ipoib_neigh_free(dev, neigh); 1012 } 1013 list_del(&p->list); 1014 kfree(p); 1015 } 1016 } 1017 spin_unlock(&priv->lock); 1018 spin_unlock_irqrestore(&priv->tx_lock, flags); 1019 } 1020 1021 static void ipoib_cm_tx_reap(struct work_struct *work) 1022 { 1023 struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, 1024 cm.reap_task); 1025 struct ipoib_cm_tx *p; 1026 unsigned long flags; 1027 1028 spin_lock_irqsave(&priv->tx_lock, flags); 1029 spin_lock(&priv->lock); 1030 while (!list_empty(&priv->cm.reap_list)) { 1031 p = list_entry(priv->cm.reap_list.next, typeof(*p), list); 1032 list_del(&p->list); 1033 spin_unlock(&priv->lock); 1034 spin_unlock_irqrestore(&priv->tx_lock, flags); 1035 ipoib_cm_tx_destroy(p); 1036 spin_lock_irqsave(&priv->tx_lock, flags); 1037 spin_lock(&priv->lock); 1038 } 1039 spin_unlock(&priv->lock); 1040 spin_unlock_irqrestore(&priv->tx_lock, flags); 1041 } 1042 1043 static void ipoib_cm_skb_reap(struct work_struct *work) 1044 { 1045 struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, 1046 cm.skb_task); 1047 struct net_device *dev = priv->dev; 1048 struct sk_buff *skb; 1049 unsigned long flags; 1050 1051 unsigned mtu = priv->mcast_mtu; 1052 1053 spin_lock_irqsave(&priv->tx_lock, flags); 1054 spin_lock(&priv->lock); 1055 while ((skb = skb_dequeue(&priv->cm.skb_queue))) { 1056 spin_unlock(&priv->lock); 1057 spin_unlock_irqrestore(&priv->tx_lock, flags); 1058 if (skb->protocol == htons(ETH_P_IP)) 1059 icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); 1060 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 1061 else if (skb->protocol == htons(ETH_P_IPV6)) 1062 icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, dev); 1063 #endif 1064 dev_kfree_skb_any(skb); 1065 spin_lock_irqsave(&priv->tx_lock, flags); 1066 spin_lock(&priv->lock); 1067 } 1068 spin_unlock(&priv->lock); 1069 spin_unlock_irqrestore(&priv->tx_lock, flags); 1070 } 1071 1072 void ipoib_cm_skb_too_long(struct net_device* dev, struct sk_buff *skb, 1073 unsigned int mtu) 1074 { 1075 struct ipoib_dev_priv *priv = netdev_priv(dev); 1076 int e = skb_queue_empty(&priv->cm.skb_queue); 1077 1078 if (skb->dst) 1079 skb->dst->ops->update_pmtu(skb->dst, mtu); 1080 1081 skb_queue_tail(&priv->cm.skb_queue, skb); 1082 if (e) 1083 queue_work(ipoib_workqueue, &priv->cm.skb_task); 1084 } 1085 1086 static void ipoib_cm_stale_task(struct work_struct *work) 1087 { 1088 struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, 1089 cm.stale_task.work); 1090 struct ipoib_cm_rx *p; 1091 unsigned long flags; 1092 1093 spin_lock_irqsave(&priv->lock, flags); 1094 while (!list_empty(&priv->cm.passive_ids)) { 1095 /* List if sorted by LRU, start from tail, 1096 * stop when we see a recently used entry */ 1097 p = list_entry(priv->cm.passive_ids.prev, typeof(*p), list); 1098 if (time_after_eq(jiffies, p->jiffies + IPOIB_CM_RX_TIMEOUT)) 1099 break; 1100 list_del_init(&p->list); 1101 spin_unlock_irqrestore(&priv->lock, flags); 1102 ib_destroy_cm_id(p->id); 1103 ib_destroy_qp(p->qp); 1104 kfree(p); 1105 spin_lock_irqsave(&priv->lock, flags); 1106 } 1107 spin_unlock_irqrestore(&priv->lock, flags); 1108 } 1109 1110 1111 static ssize_t show_mode(struct device *d, struct device_attribute *attr, 1112 char *buf) 1113 { 1114 struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(d)); 1115 1116 if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) 1117 return sprintf(buf, "connected\n"); 1118 else 1119 return sprintf(buf, "datagram\n"); 1120 } 1121 1122 static ssize_t set_mode(struct device *d, struct device_attribute *attr, 1123 const char *buf, size_t count) 1124 { 1125 struct net_device *dev = to_net_dev(d); 1126 struct ipoib_dev_priv *priv = netdev_priv(dev); 1127 1128 /* flush paths if we switch modes so that connections are restarted */ 1129 if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) { 1130 set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); 1131 ipoib_warn(priv, "enabling connected mode " 1132 "will cause multicast packet drops\n"); 1133 ipoib_flush_paths(dev); 1134 return count; 1135 } 1136 1137 if (!strcmp(buf, "datagram\n")) { 1138 clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); 1139 dev->mtu = min(priv->mcast_mtu, dev->mtu); 1140 ipoib_flush_paths(dev); 1141 return count; 1142 } 1143 1144 return -EINVAL; 1145 } 1146 1147 static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO, show_mode, set_mode); 1148 1149 int ipoib_cm_add_mode_attr(struct net_device *dev) 1150 { 1151 return device_create_file(&dev->dev, &dev_attr_mode); 1152 } 1153 1154 int ipoib_cm_dev_init(struct net_device *dev) 1155 { 1156 struct ipoib_dev_priv *priv = netdev_priv(dev); 1157 struct ib_srq_init_attr srq_init_attr = { 1158 .attr = { 1159 .max_wr = ipoib_recvq_size, 1160 .max_sge = IPOIB_CM_RX_SG 1161 } 1162 }; 1163 int ret, i; 1164 1165 INIT_LIST_HEAD(&priv->cm.passive_ids); 1166 INIT_LIST_HEAD(&priv->cm.reap_list); 1167 INIT_LIST_HEAD(&priv->cm.start_list); 1168 INIT_WORK(&priv->cm.start_task, ipoib_cm_tx_start); 1169 INIT_WORK(&priv->cm.reap_task, ipoib_cm_tx_reap); 1170 INIT_WORK(&priv->cm.skb_task, ipoib_cm_skb_reap); 1171 INIT_DELAYED_WORK(&priv->cm.stale_task, ipoib_cm_stale_task); 1172 1173 skb_queue_head_init(&priv->cm.skb_queue); 1174 1175 priv->cm.srq = ib_create_srq(priv->pd, &srq_init_attr); 1176 if (IS_ERR(priv->cm.srq)) { 1177 ret = PTR_ERR(priv->cm.srq); 1178 priv->cm.srq = NULL; 1179 return ret; 1180 } 1181 1182 priv->cm.srq_ring = kzalloc(ipoib_recvq_size * sizeof *priv->cm.srq_ring, 1183 GFP_KERNEL); 1184 if (!priv->cm.srq_ring) { 1185 printk(KERN_WARNING "%s: failed to allocate CM ring (%d entries)\n", 1186 priv->ca->name, ipoib_recvq_size); 1187 ipoib_cm_dev_cleanup(dev); 1188 return -ENOMEM; 1189 } 1190 1191 for (i = 0; i < IPOIB_CM_RX_SG; ++i) 1192 priv->cm.rx_sge[i].lkey = priv->mr->lkey; 1193 1194 priv->cm.rx_sge[0].length = IPOIB_CM_HEAD_SIZE; 1195 for (i = 1; i < IPOIB_CM_RX_SG; ++i) 1196 priv->cm.rx_sge[i].length = PAGE_SIZE; 1197 priv->cm.rx_wr.next = NULL; 1198 priv->cm.rx_wr.sg_list = priv->cm.rx_sge; 1199 priv->cm.rx_wr.num_sge = IPOIB_CM_RX_SG; 1200 1201 for (i = 0; i < ipoib_recvq_size; ++i) { 1202 if (!ipoib_cm_alloc_rx_skb(dev, i, IPOIB_CM_RX_SG - 1, 1203 priv->cm.srq_ring[i].mapping)) { 1204 ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); 1205 ipoib_cm_dev_cleanup(dev); 1206 return -ENOMEM; 1207 } 1208 if (ipoib_cm_post_receive(dev, i)) { 1209 ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i); 1210 ipoib_cm_dev_cleanup(dev); 1211 return -EIO; 1212 } 1213 } 1214 1215 priv->dev->dev_addr[0] = IPOIB_FLAGS_RC; 1216 return 0; 1217 } 1218 1219 void ipoib_cm_dev_cleanup(struct net_device *dev) 1220 { 1221 struct ipoib_dev_priv *priv = netdev_priv(dev); 1222 int i, ret; 1223 1224 if (!priv->cm.srq) 1225 return; 1226 1227 ipoib_dbg(priv, "Cleanup ipoib connected mode.\n"); 1228 1229 ret = ib_destroy_srq(priv->cm.srq); 1230 if (ret) 1231 ipoib_warn(priv, "ib_destroy_srq failed: %d\n", ret); 1232 1233 priv->cm.srq = NULL; 1234 if (!priv->cm.srq_ring) 1235 return; 1236 for (i = 0; i < ipoib_recvq_size; ++i) 1237 if (priv->cm.srq_ring[i].skb) { 1238 ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1, 1239 priv->cm.srq_ring[i].mapping); 1240 dev_kfree_skb_any(priv->cm.srq_ring[i].skb); 1241 priv->cm.srq_ring[i].skb = NULL; 1242 } 1243 kfree(priv->cm.srq_ring); 1244 priv->cm.srq_ring = NULL; 1245 } 1246