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Linux 2.6.21
[linux/fpc-iii.git] / drivers / infiniband / ulp / ipoib / ipoib_cm.c
blob2b242a4823f8d42525323d3fac318f2c33851c17
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_FROM_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 - IPOIB_ENCAP_LEN);
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_before_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 }
Linux with added FPC-III support