1 /*
2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
5 * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 */
35
36 #include "ipoib.h"
37
38 #include <rdma/ib_cache.h>
39
40 #include <security/mac/mac_framework.h>
41
42 #include <linux/delay.h>
43 #include <linux/dma-mapping.h>
44
45 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
46 static int data_debug_level;
47
48 module_param(data_debug_level, int, 0644);
49 MODULE_PARM_DESC(data_debug_level,
50 "Enable data path debug tracing if > 0");
51 #endif
52
53 static DEFINE_MUTEX(pkey_mutex);
54
ipoib_create_ah(struct ipoib_dev_priv * priv,struct ib_pd * pd,struct ib_ah_attr * attr)55 struct ipoib_ah *ipoib_create_ah(struct ipoib_dev_priv *priv,
56 struct ib_pd *pd, struct ib_ah_attr *attr)
57 {
58 struct ipoib_ah *ah;
59
60 ah = kmalloc(sizeof *ah, GFP_KERNEL);
61 if (!ah)
62 return NULL;
63
64 ah->priv = priv;
65 ah->last_send = 0;
66 kref_init(&ah->ref);
67
68 ah->ah = ib_create_ah(pd, attr);
69 if (IS_ERR(ah->ah)) {
70 kfree(ah);
71 ah = NULL;
72 } else
73 ipoib_dbg(priv, "Created ah %p\n", ah->ah);
74
75 return ah;
76 }
77
ipoib_free_ah(struct kref * kref)78 void ipoib_free_ah(struct kref *kref)
79 {
80 struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref);
81 struct ipoib_dev_priv *priv = ah->priv;
82
83 unsigned long flags;
84
85 spin_lock_irqsave(&priv->lock, flags);
86 list_add_tail(&ah->list, &priv->dead_ahs);
87 spin_unlock_irqrestore(&priv->lock, flags);
88 }
89
90 void
ipoib_dma_unmap_rx(struct ipoib_dev_priv * priv,struct ipoib_rx_buf * rx_req)91 ipoib_dma_unmap_rx(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req)
92 {
93 struct mbuf *m;
94 int i;
95
96 for (i = 0, m = rx_req->mb; m != NULL; m = m->m_next, i++)
97 ib_dma_unmap_single(priv->ca, rx_req->mapping[i], m->m_len,
98 DMA_FROM_DEVICE);
99 }
100
101 void
ipoib_dma_mb(struct ipoib_dev_priv * priv,struct mbuf * mb,unsigned int length)102 ipoib_dma_mb(struct ipoib_dev_priv *priv, struct mbuf *mb, unsigned int length)
103 {
104
105 m_adj(mb, -(mb->m_pkthdr.len - length));
106 }
107
108 struct mbuf *
ipoib_alloc_map_mb(struct ipoib_dev_priv * priv,struct ipoib_rx_buf * rx_req,int size)109 ipoib_alloc_map_mb(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req,
110 int size)
111 {
112 struct mbuf *mb, *m;
113 int i, j;
114
115 rx_req->mb = NULL;
116 mb = m_getm2(NULL, size, M_NOWAIT, MT_DATA, M_PKTHDR);
117 if (mb == NULL)
118 return (NULL);
119 for (i = 0, m = mb; m != NULL; m = m->m_next, i++) {
120 m->m_len = (m->m_flags & M_EXT) ? m->m_ext.ext_size :
121 ((m->m_flags & M_PKTHDR) ? MHLEN : MLEN);
122 mb->m_pkthdr.len += m->m_len;
123 rx_req->mapping[i] = ib_dma_map_single(priv->ca,
124 mtod(m, void *), m->m_len, DMA_FROM_DEVICE);
125 if (unlikely(ib_dma_mapping_error(priv->ca,
126 rx_req->mapping[i])))
127 goto error;
128
129 }
130 rx_req->mb = mb;
131 return (mb);
132 error:
133 for (j = 0, m = mb; j < i; m = m->m_next, j++)
134 ib_dma_unmap_single(priv->ca, rx_req->mapping[j], m->m_len,
135 DMA_FROM_DEVICE);
136 m_freem(mb);
137 return (NULL);
138
139 }
140
ipoib_ib_post_receive(struct ipoib_dev_priv * priv,int id)141 static int ipoib_ib_post_receive(struct ipoib_dev_priv *priv, int id)
142 {
143 struct ipoib_rx_buf *rx_req;
144 struct ib_recv_wr *bad_wr;
145 struct mbuf *m;
146 int ret;
147 int i;
148
149 rx_req = &priv->rx_ring[id];
150 for (m = rx_req->mb, i = 0; m != NULL; m = m->m_next, i++) {
151 priv->rx_sge[i].addr = rx_req->mapping[i];
152 priv->rx_sge[i].length = m->m_len;
153 }
154 priv->rx_wr.num_sge = i;
155 priv->rx_wr.wr_id = id | IPOIB_OP_RECV;
156
157 ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr);
158 if (unlikely(ret)) {
159 ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret);
160 ipoib_dma_unmap_rx(priv, &priv->rx_ring[id]);
161 m_freem(priv->rx_ring[id].mb);
162 priv->rx_ring[id].mb = NULL;
163 }
164
165 return ret;
166 }
167
168 static struct mbuf *
ipoib_alloc_rx_mb(struct ipoib_dev_priv * priv,int id)169 ipoib_alloc_rx_mb(struct ipoib_dev_priv *priv, int id)
170 {
171
172 return ipoib_alloc_map_mb(priv, &priv->rx_ring[id],
173 priv->max_ib_mtu + IB_GRH_BYTES);
174 }
175
ipoib_ib_post_receives(struct ipoib_dev_priv * priv)176 static int ipoib_ib_post_receives(struct ipoib_dev_priv *priv)
177 {
178 int i;
179
180 for (i = 0; i < ipoib_recvq_size; ++i) {
181 if (!ipoib_alloc_rx_mb(priv, i)) {
182 ipoib_warn(priv, "failed to allocate receive buffer %d\n", i);
183 return -ENOMEM;
184 }
185 if (ipoib_ib_post_receive(priv, i)) {
186 ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i);
187 return -EIO;
188 }
189 }
190
191 return 0;
192 }
193
194 static void
ipoib_ib_handle_rx_wc(struct ipoib_dev_priv * priv,struct ib_wc * wc)195 ipoib_ib_handle_rx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc)
196 {
197 struct ipoib_rx_buf saverx;
198 unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV;
199 struct ifnet *dev = priv->dev;
200 struct ipoib_header *eh;
201 struct mbuf *mb;
202
203 ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n",
204 wr_id, wc->status);
205
206 if (unlikely(wr_id >= ipoib_recvq_size)) {
207 ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n",
208 wr_id, ipoib_recvq_size);
209 return;
210 }
211
212 mb = priv->rx_ring[wr_id].mb;
213
214 if (unlikely(wc->status != IB_WC_SUCCESS)) {
215 if (wc->status != IB_WC_WR_FLUSH_ERR) {
216 ipoib_warn(priv, "failed recv event "
217 "(status=%d, wrid=%d vend_err %x)\n",
218 wc->status, wr_id, wc->vendor_err);
219 goto repost;
220 }
221 if (mb) {
222 ipoib_dma_unmap_rx(priv, &priv->rx_ring[wr_id]);
223 m_freem(mb);
224 priv->rx_ring[wr_id].mb = NULL;
225 }
226 return;
227 }
228
229 /*
230 * Drop packets that this interface sent, ie multicast packets
231 * that the HCA has replicated.
232 */
233 if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num)
234 goto repost;
235
236 memcpy(&saverx, &priv->rx_ring[wr_id], sizeof(saverx));
237 /*
238 * If we can't allocate a new RX buffer, dump
239 * this packet and reuse the old buffer.
240 */
241 if (unlikely(!ipoib_alloc_rx_mb(priv, wr_id))) {
242 memcpy(&priv->rx_ring[wr_id], &saverx, sizeof(saverx));
243 dev->if_iqdrops++;
244 goto repost;
245 }
246
247 ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
248 wc->byte_len, wc->slid);
249
250 ipoib_dma_unmap_rx(priv, &saverx);
251 ipoib_dma_mb(priv, mb, wc->byte_len);
252
253 ++dev->if_ipackets;
254 dev->if_ibytes += mb->m_pkthdr.len;
255 mb->m_pkthdr.rcvif = dev;
256 m_adj(mb, sizeof(struct ib_grh) - INFINIBAND_ALEN);
257 eh = mtod(mb, struct ipoib_header *);
258 bzero(eh->hwaddr, 4); /* Zero the queue pair, only dgid is in grh */
259
260 if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->csum_ok))
261 mb->m_pkthdr.csum_flags = CSUM_IP_CHECKED | CSUM_IP_VALID;
262
263 dev->if_input(dev, mb);
264
265 repost:
266 if (unlikely(ipoib_ib_post_receive(priv, wr_id)))
267 ipoib_warn(priv, "ipoib_ib_post_receive failed "
268 "for buf %d\n", wr_id);
269 }
270
ipoib_dma_map_tx(struct ib_device * ca,struct ipoib_tx_buf * tx_req,int max)271 int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req, int max)
272 {
273 struct mbuf *mb = tx_req->mb;
274 u64 *mapping = tx_req->mapping;
275 struct mbuf *m, *p;
276 int error;
277 int i;
278
279 for (m = mb, p = NULL, i = 0; m != NULL; p = m, m = m->m_next, i++) {
280 if (m->m_len != 0)
281 continue;
282 if (p == NULL)
283 panic("ipoib_dma_map_tx: First mbuf empty\n");
284 p->m_next = m_free(m);
285 m = p;
286 i--;
287 }
288 i--;
289 if (i >= max) {
290 tx_req->mb = mb = m_defrag(mb, M_NOWAIT);
291 if (mb == NULL)
292 return -EIO;
293 for (m = mb, i = 0; m != NULL; m = m->m_next, i++);
294 if (i >= max)
295 return -EIO;
296 }
297 error = 0;
298 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) {
299 mapping[i] = ib_dma_map_single(ca, mtod(m, void *),
300 m->m_len, DMA_TO_DEVICE);
301 if (unlikely(ib_dma_mapping_error(ca, mapping[i]))) {
302 error = -EIO;
303 break;
304 }
305 }
306 if (error) {
307 int end;
308
309 end = i;
310 for (m = mb, i = 0; i < end; m = m->m_next, i++)
311 ib_dma_unmap_single(ca, mapping[i], m->m_len,
312 DMA_TO_DEVICE);
313 }
314 return error;
315 }
316
ipoib_dma_unmap_tx(struct ib_device * ca,struct ipoib_tx_buf * tx_req)317 void ipoib_dma_unmap_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req)
318 {
319 struct mbuf *mb = tx_req->mb;
320 u64 *mapping = tx_req->mapping;
321 struct mbuf *m;
322 int i;
323
324 for (m = mb, i = 0; m != NULL; m = m->m_next, i++)
325 ib_dma_unmap_single(ca, mapping[i], m->m_len, DMA_TO_DEVICE);
326 }
327
ipoib_ib_handle_tx_wc(struct ipoib_dev_priv * priv,struct ib_wc * wc)328 static void ipoib_ib_handle_tx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc)
329 {
330 struct ifnet *dev = priv->dev;
331 unsigned int wr_id = wc->wr_id;
332 struct ipoib_tx_buf *tx_req;
333
334 ipoib_dbg_data(priv, "send completion: id %d, status: %d\n",
335 wr_id, wc->status);
336
337 if (unlikely(wr_id >= ipoib_sendq_size)) {
338 ipoib_warn(priv, "send completion event with wrid %d (> %d)\n",
339 wr_id, ipoib_sendq_size);
340 return;
341 }
342
343 tx_req = &priv->tx_ring[wr_id];
344
345 ipoib_dma_unmap_tx(priv->ca, tx_req);
346
347 ++dev->if_opackets;
348
349 m_freem(tx_req->mb);
350
351 ++priv->tx_tail;
352 if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
353 (dev->if_drv_flags & IFF_DRV_OACTIVE) &&
354 test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
355 dev->if_drv_flags &= ~IFF_DRV_OACTIVE;
356
357 if (wc->status != IB_WC_SUCCESS &&
358 wc->status != IB_WC_WR_FLUSH_ERR)
359 ipoib_warn(priv, "failed send event "
360 "(status=%d, wrid=%d vend_err %x)\n",
361 wc->status, wr_id, wc->vendor_err);
362 }
363
364 int
ipoib_poll_tx(struct ipoib_dev_priv * priv)365 ipoib_poll_tx(struct ipoib_dev_priv *priv)
366 {
367 int n, i;
368
369 n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc);
370 for (i = 0; i < n; ++i) {
371 struct ib_wc *wc = priv->send_wc + i;
372 if (wc->wr_id & IPOIB_OP_CM)
373 ipoib_cm_handle_tx_wc(priv, wc);
374 else
375 ipoib_ib_handle_tx_wc(priv, wc);
376 }
377
378 return n == MAX_SEND_CQE;
379 }
380
381 static void
ipoib_poll(struct ipoib_dev_priv * priv)382 ipoib_poll(struct ipoib_dev_priv *priv)
383 {
384 int n, i;
385
386 poll_more:
387 for (;;) {
388 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc);
389
390 for (i = 0; i < n; i++) {
391 struct ib_wc *wc = priv->ibwc + i;
392
393 if ((wc->wr_id & IPOIB_OP_RECV) == 0)
394 panic("ipoib_poll: Bad wr_id 0x%jX\n",
395 (intmax_t)wc->wr_id);
396 if (wc->wr_id & IPOIB_OP_CM)
397 ipoib_cm_handle_rx_wc(priv, wc);
398 else
399 ipoib_ib_handle_rx_wc(priv, wc);
400 }
401
402 if (n != IPOIB_NUM_WC)
403 break;
404 }
405
406 if (ib_req_notify_cq(priv->recv_cq,
407 IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS))
408 goto poll_more;
409 }
410
ipoib_ib_completion(struct ib_cq * cq,void * dev_ptr)411 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
412 {
413 struct ipoib_dev_priv *priv = dev_ptr;
414
415 ipoib_poll(priv);
416 }
417
drain_tx_cq(struct ipoib_dev_priv * priv)418 static void drain_tx_cq(struct ipoib_dev_priv *priv)
419 {
420 struct ifnet *dev = priv->dev;
421
422 spin_lock(&priv->lock);
423 while (ipoib_poll_tx(priv))
424 ; /* nothing */
425
426 if (dev->if_drv_flags & IFF_DRV_OACTIVE)
427 mod_timer(&priv->poll_timer, jiffies + 1);
428
429 spin_unlock(&priv->lock);
430 }
431
ipoib_send_comp_handler(struct ib_cq * cq,void * dev_ptr)432 void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr)
433 {
434 struct ipoib_dev_priv *priv = dev_ptr;
435
436 mod_timer(&priv->poll_timer, jiffies);
437 }
438
439 static inline int
post_send(struct ipoib_dev_priv * priv,unsigned int wr_id,struct ib_ah * address,u32 qpn,struct ipoib_tx_buf * tx_req,void * head,int hlen)440 post_send(struct ipoib_dev_priv *priv, unsigned int wr_id,
441 struct ib_ah *address, u32 qpn, struct ipoib_tx_buf *tx_req, void *head,
442 int hlen)
443 {
444 struct ib_send_wr *bad_wr;
445 struct mbuf *mb = tx_req->mb;
446 u64 *mapping = tx_req->mapping;
447 struct mbuf *m;
448 int i;
449
450 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) {
451 priv->tx_sge[i].addr = mapping[i];
452 priv->tx_sge[i].length = m->m_len;
453 }
454 priv->tx_wr.num_sge = i;
455 priv->tx_wr.wr_id = wr_id;
456 priv->tx_wr.wr.ud.remote_qpn = qpn;
457 priv->tx_wr.wr.ud.ah = address;
458
459
460 if (head) {
461 priv->tx_wr.wr.ud.mss = 0; /* XXX mb_shinfo(mb)->gso_size; */
462 priv->tx_wr.wr.ud.header = head;
463 priv->tx_wr.wr.ud.hlen = hlen;
464 priv->tx_wr.opcode = IB_WR_LSO;
465 } else
466 priv->tx_wr.opcode = IB_WR_SEND;
467
468 return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr);
469 }
470
471 void
ipoib_send(struct ipoib_dev_priv * priv,struct mbuf * mb,struct ipoib_ah * address,u32 qpn)472 ipoib_send(struct ipoib_dev_priv *priv, struct mbuf *mb,
473 struct ipoib_ah *address, u32 qpn)
474 {
475 struct ifnet *dev = priv->dev;
476 struct ipoib_tx_buf *tx_req;
477 int hlen;
478 void *phead;
479
480 if (unlikely(priv->tx_outstanding > MAX_SEND_CQE))
481 while (ipoib_poll_tx(priv))
482 ; /* nothing */
483
484 m_adj(mb, sizeof (struct ipoib_pseudoheader));
485 if (0 /* XXX segment offload mb_is_gso(mb) */) {
486 /* XXX hlen = mb_transport_offset(mb) + tcp_hdrlen(mb); */
487 phead = mtod(mb, void *);
488 if (mb->m_len < hlen) {
489 ipoib_warn(priv, "linear data too small\n");
490 ++dev->if_oerrors;
491 m_freem(mb);
492 return;
493 }
494 m_adj(mb, hlen);
495 } else {
496 if (unlikely(mb->m_pkthdr.len - IPOIB_ENCAP_LEN > priv->mcast_mtu)) {
497 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
498 mb->m_pkthdr.len, priv->mcast_mtu);
499 ++dev->if_oerrors;
500 ipoib_cm_mb_too_long(priv, mb, priv->mcast_mtu);
501 return;
502 }
503 phead = NULL;
504 hlen = 0;
505 }
506
507 ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n",
508 mb->m_pkthdr.len, address, qpn);
509
510 /*
511 * We put the mb into the tx_ring _before_ we call post_send()
512 * because it's entirely possible that the completion handler will
513 * run before we execute anything after the post_send(). That
514 * means we have to make sure everything is properly recorded and
515 * our state is consistent before we call post_send().
516 */
517 tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
518 tx_req->mb = mb;
519 if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req, IPOIB_UD_TX_SG))) {
520 ++dev->if_oerrors;
521 if (tx_req->mb)
522 m_freem(tx_req->mb);
523 return;
524 }
525
526 if (mb->m_pkthdr.csum_flags & (CSUM_IP|CSUM_TCP|CSUM_UDP))
527 priv->tx_wr.send_flags |= IB_SEND_IP_CSUM;
528 else
529 priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM;
530
531 if (++priv->tx_outstanding == ipoib_sendq_size) {
532 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
533 if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP))
534 ipoib_warn(priv, "request notify on send CQ failed\n");
535 dev->if_drv_flags |= IFF_DRV_OACTIVE;
536 }
537
538 if (unlikely(post_send(priv,
539 priv->tx_head & (ipoib_sendq_size - 1), address->ah, qpn,
540 tx_req, phead, hlen))) {
541 ipoib_warn(priv, "post_send failed\n");
542 ++dev->if_oerrors;
543 --priv->tx_outstanding;
544 ipoib_dma_unmap_tx(priv->ca, tx_req);
545 m_freem(mb);
546 if (dev->if_drv_flags & IFF_DRV_OACTIVE)
547 dev->if_drv_flags &= ~IFF_DRV_OACTIVE;
548 } else {
549 address->last_send = priv->tx_head;
550 ++priv->tx_head;
551 }
552 }
553
__ipoib_reap_ah(struct ipoib_dev_priv * priv)554 static void __ipoib_reap_ah(struct ipoib_dev_priv *priv)
555 {
556 struct ipoib_ah *ah, *tah;
557 LIST_HEAD(remove_list);
558 unsigned long flags;
559
560 spin_lock_irqsave(&priv->lock, flags);
561
562 list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
563 if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
564 list_del(&ah->list);
565 ib_destroy_ah(ah->ah);
566 kfree(ah);
567 }
568
569 spin_unlock_irqrestore(&priv->lock, flags);
570 }
571
ipoib_reap_ah(struct work_struct * work)572 void ipoib_reap_ah(struct work_struct *work)
573 {
574 struct ipoib_dev_priv *priv =
575 container_of(work, struct ipoib_dev_priv, ah_reap_task.work);
576
577 __ipoib_reap_ah(priv);
578
579 if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
580 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
581 HZ);
582 }
583
ipoib_ah_dev_cleanup(struct ipoib_dev_priv * priv)584 static void ipoib_ah_dev_cleanup(struct ipoib_dev_priv *priv)
585 {
586 unsigned long begin;
587
588 begin = jiffies;
589
590 while (!list_empty(&priv->dead_ahs)) {
591 __ipoib_reap_ah(priv);
592
593 if (time_after(jiffies, begin + HZ)) {
594 ipoib_warn(priv, "timing out; will leak address handles\n");
595 break;
596 }
597
598 msleep(1);
599 }
600 }
601
ipoib_ib_tx_timer_func(unsigned long ctx)602 static void ipoib_ib_tx_timer_func(unsigned long ctx)
603 {
604 drain_tx_cq((struct ipoib_dev_priv *)ctx);
605 }
606
ipoib_ib_dev_open(struct ipoib_dev_priv * priv)607 int ipoib_ib_dev_open(struct ipoib_dev_priv *priv)
608 {
609 int ret;
610
611 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) {
612 ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey);
613 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
614 return -1;
615 }
616 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
617
618 ret = ipoib_init_qp(priv);
619 if (ret) {
620 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
621 return -1;
622 }
623
624 ret = ipoib_ib_post_receives(priv);
625 if (ret) {
626 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
627 ipoib_ib_dev_stop(priv, 1);
628 return -1;
629 }
630
631 ret = ipoib_cm_dev_open(priv);
632 if (ret) {
633 ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret);
634 ipoib_ib_dev_stop(priv, 1);
635 return -1;
636 }
637
638 clear_bit(IPOIB_STOP_REAPER, &priv->flags);
639 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
640
641 return 0;
642 }
643
ipoib_pkey_dev_check_presence(struct ipoib_dev_priv * priv)644 static void ipoib_pkey_dev_check_presence(struct ipoib_dev_priv *priv)
645 {
646 u16 pkey_index = 0;
647
648 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index))
649 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
650 else
651 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
652 }
653
ipoib_ib_dev_up(struct ipoib_dev_priv * priv)654 int ipoib_ib_dev_up(struct ipoib_dev_priv *priv)
655 {
656
657 ipoib_pkey_dev_check_presence(priv);
658
659 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
660 ipoib_dbg(priv, "PKEY is not assigned.\n");
661 return 0;
662 }
663
664 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
665
666 return ipoib_mcast_start_thread(priv);
667 }
668
ipoib_ib_dev_down(struct ipoib_dev_priv * priv,int flush)669 int ipoib_ib_dev_down(struct ipoib_dev_priv *priv, int flush)
670 {
671
672 ipoib_dbg(priv, "downing ib_dev\n");
673
674 clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
675 if_link_state_change(priv->dev, LINK_STATE_DOWN);
676
677 /* Shutdown the P_Key thread if still active */
678 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
679 mutex_lock(&pkey_mutex);
680 set_bit(IPOIB_PKEY_STOP, &priv->flags);
681 cancel_delayed_work(&priv->pkey_poll_task);
682 mutex_unlock(&pkey_mutex);
683 if (flush)
684 flush_workqueue(ipoib_workqueue);
685 }
686
687 ipoib_mcast_stop_thread(priv, flush);
688 ipoib_mcast_dev_flush(priv);
689
690 ipoib_flush_paths(priv);
691
692 return 0;
693 }
694
recvs_pending(struct ipoib_dev_priv * priv)695 static int recvs_pending(struct ipoib_dev_priv *priv)
696 {
697 int pending = 0;
698 int i;
699
700 for (i = 0; i < ipoib_recvq_size; ++i)
701 if (priv->rx_ring[i].mb)
702 ++pending;
703
704 return pending;
705 }
706
ipoib_drain_cq(struct ipoib_dev_priv * priv)707 void ipoib_drain_cq(struct ipoib_dev_priv *priv)
708 {
709 int i, n;
710
711 do {
712 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc);
713 for (i = 0; i < n; ++i) {
714 /*
715 * Convert any successful completions to flush
716 * errors to avoid passing packets up the
717 * stack after bringing the device down.
718 */
719 if (priv->ibwc[i].status == IB_WC_SUCCESS)
720 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;
721
722 if ((priv->ibwc[i].wr_id & IPOIB_OP_RECV) == 0)
723 panic("ipoib_drain_cq: Bad wrid 0x%jX\n",
724 (intmax_t)priv->ibwc[i].wr_id);
725 if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
726 ipoib_cm_handle_rx_wc(priv, priv->ibwc + i);
727 else
728 ipoib_ib_handle_rx_wc(priv, priv->ibwc + i);
729 }
730 } while (n == IPOIB_NUM_WC);
731
732 spin_lock(&priv->lock);
733 while (ipoib_poll_tx(priv))
734 ; /* nothing */
735
736 spin_unlock(&priv->lock);
737 }
738
ipoib_ib_dev_stop(struct ipoib_dev_priv * priv,int flush)739 int ipoib_ib_dev_stop(struct ipoib_dev_priv *priv, int flush)
740 {
741 struct ib_qp_attr qp_attr;
742 unsigned long begin;
743 struct ipoib_tx_buf *tx_req;
744 int i;
745
746 ipoib_cm_dev_stop(priv);
747
748 /*
749 * Move our QP to the error state and then reinitialize in
750 * when all work requests have completed or have been flushed.
751 */
752 qp_attr.qp_state = IB_QPS_ERR;
753 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
754 ipoib_warn(priv, "Failed to modify QP to ERROR state\n");
755
756 /* Wait for all sends and receives to complete */
757 begin = jiffies;
758
759 while (priv->tx_head != priv->tx_tail || recvs_pending(priv)) {
760 if (time_after(jiffies, begin + 5 * HZ)) {
761 ipoib_warn(priv, "timing out; %d sends %d receives not completed\n",
762 priv->tx_head - priv->tx_tail, recvs_pending(priv));
763
764 /*
765 * assume the HW is wedged and just free up
766 * all our pending work requests.
767 */
768 while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
769 tx_req = &priv->tx_ring[priv->tx_tail &
770 (ipoib_sendq_size - 1)];
771 ipoib_dma_unmap_tx(priv->ca, tx_req);
772 m_freem(tx_req->mb);
773 ++priv->tx_tail;
774 --priv->tx_outstanding;
775 }
776
777 for (i = 0; i < ipoib_recvq_size; ++i) {
778 struct ipoib_rx_buf *rx_req;
779
780 rx_req = &priv->rx_ring[i];
781 if (!rx_req->mb)
782 continue;
783 ipoib_dma_unmap_rx(priv, &priv->rx_ring[i]);
784 m_freem(rx_req->mb);
785 rx_req->mb = NULL;
786 }
787
788 goto timeout;
789 }
790
791 ipoib_drain_cq(priv);
792
793 msleep(1);
794 }
795
796 ipoib_dbg(priv, "All sends and receives done.\n");
797
798 timeout:
799 del_timer_sync(&priv->poll_timer);
800 qp_attr.qp_state = IB_QPS_RESET;
801 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
802 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
803
804 /* Wait for all AHs to be reaped */
805 set_bit(IPOIB_STOP_REAPER, &priv->flags);
806 cancel_delayed_work(&priv->ah_reap_task);
807 if (flush)
808 flush_workqueue(ipoib_workqueue);
809
810 ipoib_ah_dev_cleanup(priv);
811
812 ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP);
813
814 return 0;
815 }
816
ipoib_ib_dev_init(struct ipoib_dev_priv * priv,struct ib_device * ca,int port)817 int ipoib_ib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port)
818 {
819 struct ifnet *dev = priv->dev;
820
821 priv->ca = ca;
822 priv->port = port;
823 priv->qp = NULL;
824
825 if (ipoib_transport_dev_init(priv, ca)) {
826 printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name);
827 return -ENODEV;
828 }
829
830 setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func,
831 (unsigned long) priv);
832
833 if (dev->if_flags & IFF_UP) {
834 if (ipoib_ib_dev_open(priv)) {
835 ipoib_transport_dev_cleanup(priv);
836 return -ENODEV;
837 }
838 }
839
840 return 0;
841 }
842
__ipoib_ib_dev_flush(struct ipoib_dev_priv * priv,enum ipoib_flush_level level)843 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
844 enum ipoib_flush_level level)
845 {
846 struct ipoib_dev_priv *cpriv;
847 u16 new_index;
848
849 mutex_lock(&priv->vlan_mutex);
850
851 /*
852 * Flush any child interfaces too -- they might be up even if
853 * the parent is down.
854 */
855 list_for_each_entry(cpriv, &priv->child_intfs, list)
856 __ipoib_ib_dev_flush(cpriv, level);
857
858 mutex_unlock(&priv->vlan_mutex);
859
860 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) {
861 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
862 return;
863 }
864
865 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
866 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
867 return;
868 }
869
870 if (level == IPOIB_FLUSH_HEAVY) {
871 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) {
872 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
873 ipoib_ib_dev_down(priv, 0);
874 ipoib_ib_dev_stop(priv, 0);
875 if (ipoib_pkey_dev_delay_open(priv))
876 return;
877 }
878
879 /* restart QP only if P_Key index is changed */
880 if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
881 new_index == priv->pkey_index) {
882 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n");
883 return;
884 }
885 priv->pkey_index = new_index;
886 }
887
888 if (level == IPOIB_FLUSH_LIGHT) {
889 ipoib_mark_paths_invalid(priv);
890 ipoib_mcast_dev_flush(priv);
891 }
892
893 if (level >= IPOIB_FLUSH_NORMAL)
894 ipoib_ib_dev_down(priv, 0);
895
896 if (level == IPOIB_FLUSH_HEAVY) {
897 ipoib_ib_dev_stop(priv, 0);
898 ipoib_ib_dev_open(priv);
899 }
900
901 /*
902 * The device could have been brought down between the start and when
903 * we get here, don't bring it back up if it's not configured up
904 */
905 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
906 if (level >= IPOIB_FLUSH_NORMAL)
907 ipoib_ib_dev_up(priv);
908 ipoib_mcast_restart_task(&priv->restart_task);
909 }
910 }
911
ipoib_ib_dev_flush_light(struct work_struct * work)912 void ipoib_ib_dev_flush_light(struct work_struct *work)
913 {
914 struct ipoib_dev_priv *priv =
915 container_of(work, struct ipoib_dev_priv, flush_light);
916
917 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT);
918 }
919
ipoib_ib_dev_flush_normal(struct work_struct * work)920 void ipoib_ib_dev_flush_normal(struct work_struct *work)
921 {
922 struct ipoib_dev_priv *priv =
923 container_of(work, struct ipoib_dev_priv, flush_normal);
924
925 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL);
926 }
927
ipoib_ib_dev_flush_heavy(struct work_struct * work)928 void ipoib_ib_dev_flush_heavy(struct work_struct *work)
929 {
930 struct ipoib_dev_priv *priv =
931 container_of(work, struct ipoib_dev_priv, flush_heavy);
932
933 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY);
934 }
935
ipoib_ib_dev_cleanup(struct ipoib_dev_priv * priv)936 void ipoib_ib_dev_cleanup(struct ipoib_dev_priv *priv)
937 {
938
939 ipoib_dbg(priv, "cleaning up ib_dev\n");
940
941 ipoib_mcast_stop_thread(priv, 1);
942 ipoib_mcast_dev_flush(priv);
943
944 ipoib_ah_dev_cleanup(priv);
945 ipoib_transport_dev_cleanup(priv);
946 }
947
948 /*
949 * Delayed P_Key Assigment Interim Support
950 *
951 * The following is initial implementation of delayed P_Key assigment
952 * mechanism. It is using the same approach implemented for the multicast
953 * group join. The single goal of this implementation is to quickly address
954 * Bug #2507. This implementation will probably be removed when the P_Key
955 * change async notification is available.
956 */
957
ipoib_pkey_poll(struct work_struct * work)958 void ipoib_pkey_poll(struct work_struct *work)
959 {
960 struct ipoib_dev_priv *priv =
961 container_of(work, struct ipoib_dev_priv, pkey_poll_task.work);
962
963 ipoib_pkey_dev_check_presence(priv);
964
965 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
966 ipoib_open(priv);
967 else {
968 mutex_lock(&pkey_mutex);
969 if (!test_bit(IPOIB_PKEY_STOP, &priv->flags))
970 queue_delayed_work(ipoib_workqueue,
971 &priv->pkey_poll_task,
972 HZ);
973 mutex_unlock(&pkey_mutex);
974 }
975 }
976
ipoib_pkey_dev_delay_open(struct ipoib_dev_priv * priv)977 int ipoib_pkey_dev_delay_open(struct ipoib_dev_priv *priv)
978 {
979
980 /* Look for the interface pkey value in the IB Port P_Key table and */
981 /* set the interface pkey assigment flag */
982 ipoib_pkey_dev_check_presence(priv);
983
984 /* P_Key value not assigned yet - start polling */
985 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
986 mutex_lock(&pkey_mutex);
987 clear_bit(IPOIB_PKEY_STOP, &priv->flags);
988 queue_delayed_work(ipoib_workqueue,
989 &priv->pkey_poll_task,
990 HZ);
991 mutex_unlock(&pkey_mutex);
992 return 1;
993 }
994
995 return 0;
996 }
997