1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
3 *
4 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
5 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
6 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
7 * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved.
8 *
9 * This software is available to you under a choice of one of two
10 * licenses. You may choose to be licensed under the terms of the GNU
11 * General Public License (GPL) Version 2, available from the file
12 * COPYING in the main directory of this source tree, or the
13 * OpenIB.org BSD license below:
14 *
15 * Redistribution and use in source and binary forms, with or
16 * without modification, are permitted provided that the following
17 * conditions are met:
18 *
19 * - Redistributions of source code must retain the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer.
22 *
23 * - Redistributions in binary form must reproduce the above
24 * copyright notice, this list of conditions and the following
25 * disclaimer in the documentation and/or other materials
26 * provided with the distribution.
27 *
28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
29 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
31 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
32 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
33 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
34 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 * SOFTWARE.
36 */
37
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
40
41 #include "ipoib.h"
42
43 #include <rdma/ib_cache.h>
44
45 #include <security/mac/mac_framework.h>
46
47 #include <linux/delay.h>
48 #include <linux/dma-mapping.h>
49
50 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
51 static int data_debug_level;
52
53 module_param(data_debug_level, int, 0644);
54 MODULE_PARM_DESC(data_debug_level,
55 "Enable data path debug tracing if > 0");
56 #endif
57
58 static DEFINE_MUTEX(pkey_mutex);
59
ipoib_create_ah(struct ipoib_dev_priv * priv,struct ib_pd * pd,struct ib_ah_attr * attr)60 struct ipoib_ah *ipoib_create_ah(struct ipoib_dev_priv *priv,
61 struct ib_pd *pd, struct ib_ah_attr *attr)
62 {
63 struct ipoib_ah *ah;
64
65 ah = kmalloc(sizeof *ah, GFP_KERNEL);
66 if (!ah)
67 return NULL;
68
69 ah->priv = priv;
70 ah->last_send = 0;
71 kref_init(&ah->ref);
72
73 ah->ah = ib_create_ah(pd, attr);
74 if (IS_ERR(ah->ah)) {
75 kfree(ah);
76 ah = NULL;
77 } else
78 ipoib_dbg(priv, "Created ah %p\n", ah->ah);
79
80 return ah;
81 }
82
ipoib_free_ah(struct kref * kref)83 void ipoib_free_ah(struct kref *kref)
84 {
85 struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref);
86 struct ipoib_dev_priv *priv = ah->priv;
87
88 unsigned long flags;
89
90 spin_lock_irqsave(&priv->lock, flags);
91 list_add_tail(&ah->list, &priv->dead_ahs);
92 spin_unlock_irqrestore(&priv->lock, flags);
93 }
94
95 void
ipoib_dma_unmap_rx(struct ipoib_dev_priv * priv,struct ipoib_rx_buf * rx_req)96 ipoib_dma_unmap_rx(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req)
97 {
98 struct mbuf *m;
99 int i;
100
101 for (i = 0, m = rx_req->mb; m != NULL; m = m->m_next, i++)
102 ib_dma_unmap_single(priv->ca, rx_req->mapping[i], m->m_len,
103 DMA_FROM_DEVICE);
104 }
105
106 void
ipoib_dma_mb(struct ipoib_dev_priv * priv,struct mbuf * mb,unsigned int length)107 ipoib_dma_mb(struct ipoib_dev_priv *priv, struct mbuf *mb, unsigned int length)
108 {
109
110 m_adj(mb, -(mb->m_pkthdr.len - length));
111 }
112
113 struct mbuf *
ipoib_alloc_map_mb(struct ipoib_dev_priv * priv,struct ipoib_rx_buf * rx_req,int size)114 ipoib_alloc_map_mb(struct ipoib_dev_priv *priv, struct ipoib_rx_buf *rx_req,
115 int size)
116 {
117 struct mbuf *mb, *m;
118 int i, j;
119
120 rx_req->mb = NULL;
121 mb = m_getm2(NULL, size, M_NOWAIT, MT_DATA, M_PKTHDR);
122 if (mb == NULL)
123 return (NULL);
124 for (i = 0, m = mb; m != NULL; m = m->m_next, i++) {
125 m->m_len = M_SIZE(m);
126 mb->m_pkthdr.len += m->m_len;
127 rx_req->mapping[i] = ib_dma_map_single(priv->ca,
128 mtod(m, void *), m->m_len, DMA_FROM_DEVICE);
129 if (unlikely(ib_dma_mapping_error(priv->ca,
130 rx_req->mapping[i])))
131 goto error;
132
133 }
134 rx_req->mb = mb;
135 return (mb);
136 error:
137 for (j = 0, m = mb; j < i; m = m->m_next, j++)
138 ib_dma_unmap_single(priv->ca, rx_req->mapping[j], m->m_len,
139 DMA_FROM_DEVICE);
140 m_freem(mb);
141 return (NULL);
142
143 }
144
ipoib_ib_post_receive(struct ipoib_dev_priv * priv,int id)145 static int ipoib_ib_post_receive(struct ipoib_dev_priv *priv, int id)
146 {
147 struct ipoib_rx_buf *rx_req;
148 struct ib_recv_wr *bad_wr;
149 struct mbuf *m;
150 int ret;
151 int i;
152
153 rx_req = &priv->rx_ring[id];
154 for (m = rx_req->mb, i = 0; m != NULL; m = m->m_next, i++) {
155 priv->rx_sge[i].addr = rx_req->mapping[i];
156 priv->rx_sge[i].length = m->m_len;
157 }
158 priv->rx_wr.num_sge = i;
159 priv->rx_wr.wr_id = id | IPOIB_OP_RECV;
160
161 ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr);
162 if (unlikely(ret)) {
163 ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret);
164 ipoib_dma_unmap_rx(priv, &priv->rx_ring[id]);
165 m_freem(priv->rx_ring[id].mb);
166 priv->rx_ring[id].mb = NULL;
167 }
168
169 return ret;
170 }
171
172 static struct mbuf *
ipoib_alloc_rx_mb(struct ipoib_dev_priv * priv,int id)173 ipoib_alloc_rx_mb(struct ipoib_dev_priv *priv, int id)
174 {
175
176 return ipoib_alloc_map_mb(priv, &priv->rx_ring[id],
177 priv->max_ib_mtu + IB_GRH_BYTES);
178 }
179
ipoib_ib_post_receives(struct ipoib_dev_priv * priv)180 static int ipoib_ib_post_receives(struct ipoib_dev_priv *priv)
181 {
182 int i;
183
184 for (i = 0; i < ipoib_recvq_size; ++i) {
185 if (!ipoib_alloc_rx_mb(priv, i)) {
186 ipoib_warn(priv, "failed to allocate receive buffer %d\n", i);
187 return -ENOMEM;
188 }
189 if (ipoib_ib_post_receive(priv, i)) {
190 ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i);
191 return -EIO;
192 }
193 }
194
195 return 0;
196 }
197
198 static void
ipoib_ib_handle_rx_wc(struct ipoib_dev_priv * priv,struct ib_wc * wc)199 ipoib_ib_handle_rx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc)
200 {
201 struct ipoib_rx_buf saverx;
202 unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV;
203 struct ifnet *dev = priv->dev;
204 struct ipoib_header *eh;
205 struct mbuf *mb;
206
207 ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n",
208 wr_id, wc->status);
209
210 if (unlikely(wr_id >= ipoib_recvq_size)) {
211 ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n",
212 wr_id, ipoib_recvq_size);
213 return;
214 }
215
216 mb = priv->rx_ring[wr_id].mb;
217
218 if (unlikely(wc->status != IB_WC_SUCCESS)) {
219 if (wc->status != IB_WC_WR_FLUSH_ERR) {
220 ipoib_warn(priv, "failed recv event "
221 "(status=%d, wrid=%d vend_err %x)\n",
222 wc->status, wr_id, wc->vendor_err);
223 goto repost;
224 }
225 if (mb) {
226 ipoib_dma_unmap_rx(priv, &priv->rx_ring[wr_id]);
227 m_freem(mb);
228 priv->rx_ring[wr_id].mb = NULL;
229 }
230 return;
231 }
232
233 /*
234 * Drop packets that this interface sent, ie multicast packets
235 * that the HCA has replicated.
236 */
237 if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num)
238 goto repost;
239
240 memcpy(&saverx, &priv->rx_ring[wr_id], sizeof(saverx));
241 /*
242 * If we can't allocate a new RX buffer, dump
243 * this packet and reuse the old buffer.
244 */
245 if (unlikely(!ipoib_alloc_rx_mb(priv, wr_id))) {
246 memcpy(&priv->rx_ring[wr_id], &saverx, sizeof(saverx));
247 if_inc_counter(dev, IFCOUNTER_IQDROPS, 1);
248 goto repost;
249 }
250
251 ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
252 wc->byte_len, wc->slid);
253
254 ipoib_dma_unmap_rx(priv, &saverx);
255 ipoib_dma_mb(priv, mb, wc->byte_len);
256
257 if_inc_counter(dev, IFCOUNTER_IPACKETS, 1);
258 if_inc_counter(dev, IFCOUNTER_IBYTES, mb->m_pkthdr.len);
259 mb->m_pkthdr.rcvif = dev;
260 m_adj(mb, sizeof(struct ib_grh) - INFINIBAND_ALEN);
261 eh = mtod(mb, struct ipoib_header *);
262 bzero(eh->hwaddr, 4); /* Zero the queue pair, only dgid is in grh */
263
264 if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->wc_flags & IB_WC_IP_CSUM_OK))
265 mb->m_pkthdr.csum_flags = CSUM_IP_CHECKED | CSUM_IP_VALID;
266
267 dev->if_input(dev, mb);
268
269 repost:
270 if (unlikely(ipoib_ib_post_receive(priv, wr_id)))
271 ipoib_warn(priv, "ipoib_ib_post_receive failed "
272 "for buf %d\n", wr_id);
273 }
274
ipoib_dma_map_tx(struct ib_device * ca,struct ipoib_tx_buf * tx_req,int max)275 int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req, int max)
276 {
277 struct mbuf *mb = tx_req->mb;
278 u64 *mapping = tx_req->mapping;
279 struct mbuf *m, *p;
280 int error;
281 int i;
282
283 for (m = mb, p = NULL, i = 0; m != NULL; p = m, m = m->m_next, i++) {
284 if (m->m_len != 0)
285 continue;
286 if (p == NULL)
287 panic("ipoib_dma_map_tx: First mbuf empty\n");
288 p->m_next = m_free(m);
289 m = p;
290 i--;
291 }
292 i--;
293 if (i >= max) {
294 tx_req->mb = mb = m_defrag(mb, M_NOWAIT);
295 if (mb == NULL)
296 return -EIO;
297 for (m = mb, i = 0; m != NULL; m = m->m_next, i++);
298 if (i >= max)
299 return -EIO;
300 }
301 error = 0;
302 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) {
303 mapping[i] = ib_dma_map_single(ca, mtod(m, void *),
304 m->m_len, DMA_TO_DEVICE);
305 if (unlikely(ib_dma_mapping_error(ca, mapping[i]))) {
306 error = -EIO;
307 break;
308 }
309 }
310 if (error) {
311 int end;
312
313 end = i;
314 for (m = mb, i = 0; i < end; m = m->m_next, i++)
315 ib_dma_unmap_single(ca, mapping[i], m->m_len,
316 DMA_TO_DEVICE);
317 }
318 return error;
319 }
320
ipoib_dma_unmap_tx(struct ib_device * ca,struct ipoib_tx_buf * tx_req)321 void ipoib_dma_unmap_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req)
322 {
323 struct mbuf *mb = tx_req->mb;
324 u64 *mapping = tx_req->mapping;
325 struct mbuf *m;
326 int i;
327
328 for (m = mb, i = 0; m != NULL; m = m->m_next, i++)
329 ib_dma_unmap_single(ca, mapping[i], m->m_len, DMA_TO_DEVICE);
330 }
331
ipoib_ib_handle_tx_wc(struct ipoib_dev_priv * priv,struct ib_wc * wc)332 static void ipoib_ib_handle_tx_wc(struct ipoib_dev_priv *priv, struct ib_wc *wc)
333 {
334 struct ifnet *dev = priv->dev;
335 unsigned int wr_id = wc->wr_id;
336 struct ipoib_tx_buf *tx_req;
337
338 ipoib_dbg_data(priv, "send completion: id %d, status: %d\n",
339 wr_id, wc->status);
340
341 if (unlikely(wr_id >= ipoib_sendq_size)) {
342 ipoib_warn(priv, "send completion event with wrid %d (> %d)\n",
343 wr_id, ipoib_sendq_size);
344 return;
345 }
346
347 tx_req = &priv->tx_ring[wr_id];
348
349 ipoib_dma_unmap_tx(priv->ca, tx_req);
350
351 if_inc_counter(dev, IFCOUNTER_OPACKETS, 1);
352
353 m_freem(tx_req->mb);
354
355 ++priv->tx_tail;
356 if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
357 (dev->if_drv_flags & IFF_DRV_OACTIVE) &&
358 test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
359 dev->if_drv_flags &= ~IFF_DRV_OACTIVE;
360
361 if (wc->status != IB_WC_SUCCESS &&
362 wc->status != IB_WC_WR_FLUSH_ERR)
363 ipoib_warn(priv, "failed send event "
364 "(status=%d, wrid=%d vend_err %x)\n",
365 wc->status, wr_id, wc->vendor_err);
366 }
367
368 int
ipoib_poll_tx(struct ipoib_dev_priv * priv,bool do_start)369 ipoib_poll_tx(struct ipoib_dev_priv *priv, bool do_start)
370 {
371 int n, i;
372
373 n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc);
374 for (i = 0; i < n; ++i) {
375 struct ib_wc *wc = priv->send_wc + i;
376 if (wc->wr_id & IPOIB_OP_CM)
377 ipoib_cm_handle_tx_wc(priv, wc);
378 else
379 ipoib_ib_handle_tx_wc(priv, wc);
380 }
381
382 if (do_start && n != 0)
383 ipoib_start_locked(priv->dev, priv);
384
385 return n == MAX_SEND_CQE;
386 }
387
388 static void
ipoib_poll(struct ipoib_dev_priv * priv)389 ipoib_poll(struct ipoib_dev_priv *priv)
390 {
391 int n, i;
392
393 poll_more:
394 spin_lock(&priv->drain_lock);
395 for (;;) {
396 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc);
397 for (i = 0; i < n; i++) {
398 struct ib_wc *wc = priv->ibwc + i;
399
400 if ((wc->wr_id & IPOIB_OP_RECV) == 0)
401 panic("ipoib_poll: Bad wr_id 0x%jX\n",
402 (intmax_t)wc->wr_id);
403 if (wc->wr_id & IPOIB_OP_CM)
404 ipoib_cm_handle_rx_wc(priv, wc);
405 else
406 ipoib_ib_handle_rx_wc(priv, wc);
407 }
408
409 if (n != IPOIB_NUM_WC)
410 break;
411 }
412 spin_unlock(&priv->drain_lock);
413
414 if (ib_req_notify_cq(priv->recv_cq,
415 IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS) > 0)
416 goto poll_more;
417 }
418
ipoib_ib_completion(struct ib_cq * cq,void * dev_ptr)419 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
420 {
421 struct ipoib_dev_priv *priv = dev_ptr;
422
423 ipoib_poll(priv);
424 }
425
drain_tx_cq(struct ipoib_dev_priv * priv)426 static void drain_tx_cq(struct ipoib_dev_priv *priv)
427 {
428 struct ifnet *dev = priv->dev;
429
430 spin_lock(&priv->lock);
431 while (ipoib_poll_tx(priv, true))
432 ; /* nothing */
433
434 if (dev->if_drv_flags & IFF_DRV_OACTIVE)
435 mod_timer(&priv->poll_timer, jiffies + 1);
436
437 spin_unlock(&priv->lock);
438 }
439
ipoib_send_comp_handler(struct ib_cq * cq,void * dev_ptr)440 void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr)
441 {
442 struct ipoib_dev_priv *priv = dev_ptr;
443
444 mod_timer(&priv->poll_timer, jiffies);
445 }
446
447 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)448 post_send(struct ipoib_dev_priv *priv, unsigned int wr_id,
449 struct ib_ah *address, u32 qpn, struct ipoib_tx_buf *tx_req, void *head,
450 int hlen)
451 {
452 struct ib_send_wr *bad_wr;
453 struct mbuf *mb = tx_req->mb;
454 u64 *mapping = tx_req->mapping;
455 struct mbuf *m;
456 int i;
457
458 for (m = mb, i = 0; m != NULL; m = m->m_next, i++) {
459 priv->tx_sge[i].addr = mapping[i];
460 priv->tx_sge[i].length = m->m_len;
461 }
462 priv->tx_wr.wr.num_sge = i;
463 priv->tx_wr.wr.wr_id = wr_id;
464 priv->tx_wr.remote_qpn = qpn;
465 priv->tx_wr.ah = address;
466
467 if (head) {
468 priv->tx_wr.mss = 0; /* XXX mb_shinfo(mb)->gso_size; */
469 priv->tx_wr.header = head;
470 priv->tx_wr.hlen = hlen;
471 priv->tx_wr.wr.opcode = IB_WR_LSO;
472 } else
473 priv->tx_wr.wr.opcode = IB_WR_SEND;
474
475 return ib_post_send(priv->qp, &priv->tx_wr.wr, &bad_wr);
476 }
477
478 void
ipoib_send(struct ipoib_dev_priv * priv,struct mbuf * mb,struct ipoib_ah * address,u32 qpn)479 ipoib_send(struct ipoib_dev_priv *priv, struct mbuf *mb,
480 struct ipoib_ah *address, u32 qpn)
481 {
482 struct ifnet *dev = priv->dev;
483 struct ipoib_tx_buf *tx_req;
484 int hlen;
485 void *phead;
486
487 if (unlikely(priv->tx_outstanding > MAX_SEND_CQE))
488 while (ipoib_poll_tx(priv, false))
489 ; /* nothing */
490
491 m_adj(mb, sizeof (struct ipoib_pseudoheader));
492 if (0 /* XXX segment offload mb_is_gso(mb) */) {
493 /* XXX hlen = mb_transport_offset(mb) + tcp_hdrlen(mb); */
494 phead = mtod(mb, void *);
495 if (mb->m_len < hlen) {
496 ipoib_warn(priv, "linear data too small\n");
497 if_inc_counter(dev, IFCOUNTER_OERRORS, 1);
498 m_freem(mb);
499 return;
500 }
501 m_adj(mb, hlen);
502 } else {
503 if (unlikely(mb->m_pkthdr.len - IPOIB_ENCAP_LEN > priv->mcast_mtu)) {
504 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
505 mb->m_pkthdr.len, priv->mcast_mtu);
506 if_inc_counter(dev, IFCOUNTER_OERRORS, 1);
507 ipoib_cm_mb_too_long(priv, mb, priv->mcast_mtu);
508 return;
509 }
510 phead = NULL;
511 hlen = 0;
512 }
513
514 ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n",
515 mb->m_pkthdr.len, address, qpn);
516
517 /*
518 * We put the mb into the tx_ring _before_ we call post_send()
519 * because it's entirely possible that the completion handler will
520 * run before we execute anything after the post_send(). That
521 * means we have to make sure everything is properly recorded and
522 * our state is consistent before we call post_send().
523 */
524 tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
525 tx_req->mb = mb;
526 if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req, IPOIB_UD_TX_SG))) {
527 if_inc_counter(dev, IFCOUNTER_OERRORS, 1);
528 if (tx_req->mb)
529 m_freem(tx_req->mb);
530 return;
531 }
532
533 if (mb->m_pkthdr.csum_flags & (CSUM_IP|CSUM_TCP|CSUM_UDP))
534 priv->tx_wr.wr.send_flags |= IB_SEND_IP_CSUM;
535 else
536 priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM;
537
538 if (++priv->tx_outstanding == ipoib_sendq_size) {
539 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
540 if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP))
541 ipoib_warn(priv, "request notify on send CQ failed\n");
542 dev->if_drv_flags |= IFF_DRV_OACTIVE;
543 }
544
545 if (unlikely(post_send(priv,
546 priv->tx_head & (ipoib_sendq_size - 1), address->ah, qpn,
547 tx_req, phead, hlen))) {
548 ipoib_warn(priv, "post_send failed\n");
549 if_inc_counter(dev, IFCOUNTER_OERRORS, 1);
550 --priv->tx_outstanding;
551 ipoib_dma_unmap_tx(priv->ca, tx_req);
552 m_freem(mb);
553 if (dev->if_drv_flags & IFF_DRV_OACTIVE)
554 dev->if_drv_flags &= ~IFF_DRV_OACTIVE;
555 } else {
556 address->last_send = priv->tx_head;
557 ++priv->tx_head;
558 }
559 }
560
__ipoib_reap_ah(struct ipoib_dev_priv * priv)561 static void __ipoib_reap_ah(struct ipoib_dev_priv *priv)
562 {
563 struct ipoib_ah *ah, *tah;
564 LIST_HEAD(remove_list);
565 unsigned long flags;
566
567 spin_lock_irqsave(&priv->lock, flags);
568
569 list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
570 if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
571 list_del(&ah->list);
572 ib_destroy_ah(ah->ah);
573 kfree(ah);
574 }
575
576 spin_unlock_irqrestore(&priv->lock, flags);
577 }
578
ipoib_reap_ah(struct work_struct * work)579 void ipoib_reap_ah(struct work_struct *work)
580 {
581 struct ipoib_dev_priv *priv =
582 container_of(work, struct ipoib_dev_priv, ah_reap_task.work);
583
584 __ipoib_reap_ah(priv);
585
586 if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
587 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
588 HZ);
589 }
590
ipoib_ah_dev_cleanup(struct ipoib_dev_priv * priv)591 static void ipoib_ah_dev_cleanup(struct ipoib_dev_priv *priv)
592 {
593 unsigned long begin;
594
595 begin = jiffies;
596
597 while (!list_empty(&priv->dead_ahs)) {
598 __ipoib_reap_ah(priv);
599
600 if (time_after(jiffies, begin + HZ)) {
601 ipoib_warn(priv, "timing out; will leak address handles\n");
602 break;
603 }
604
605 msleep(1);
606 }
607 }
608
ipoib_ib_tx_timer_func(unsigned long ctx)609 static void ipoib_ib_tx_timer_func(unsigned long ctx)
610 {
611 drain_tx_cq((struct ipoib_dev_priv *)ctx);
612 }
613
ipoib_ib_dev_open(struct ipoib_dev_priv * priv)614 int ipoib_ib_dev_open(struct ipoib_dev_priv *priv)
615 {
616 int ret;
617
618 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) {
619 ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey);
620 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
621 return -1;
622 }
623 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
624
625 ret = ipoib_init_qp(priv);
626 if (ret) {
627 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
628 return -1;
629 }
630
631 ret = ipoib_ib_post_receives(priv);
632 if (ret) {
633 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
634 ipoib_ib_dev_stop(priv, 1);
635 return -1;
636 }
637
638 ret = ipoib_cm_dev_open(priv);
639 if (ret) {
640 ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret);
641 ipoib_ib_dev_stop(priv, 1);
642 return -1;
643 }
644
645 clear_bit(IPOIB_STOP_REAPER, &priv->flags);
646 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
647
648 set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
649
650 return 0;
651 }
652
ipoib_pkey_dev_check_presence(struct ipoib_dev_priv * priv)653 static void ipoib_pkey_dev_check_presence(struct ipoib_dev_priv *priv)
654 {
655 u16 pkey_index = 0;
656
657 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index))
658 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
659 else
660 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
661 }
662
ipoib_ib_dev_up(struct ipoib_dev_priv * priv)663 int ipoib_ib_dev_up(struct ipoib_dev_priv *priv)
664 {
665
666 ipoib_pkey_dev_check_presence(priv);
667
668 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
669 ipoib_dbg(priv, "PKEY is not assigned.\n");
670 return 0;
671 }
672
673 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
674
675 return ipoib_mcast_start_thread(priv);
676 }
677
ipoib_ib_dev_down(struct ipoib_dev_priv * priv,int flush)678 int ipoib_ib_dev_down(struct ipoib_dev_priv *priv, int flush)
679 {
680
681 ipoib_dbg(priv, "downing ib_dev\n");
682
683 clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
684 if_link_state_change(priv->dev, LINK_STATE_DOWN);
685
686 /* Shutdown the P_Key thread if still active */
687 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
688 mutex_lock(&pkey_mutex);
689 set_bit(IPOIB_PKEY_STOP, &priv->flags);
690 cancel_delayed_work(&priv->pkey_poll_task);
691 mutex_unlock(&pkey_mutex);
692 if (flush)
693 flush_workqueue(ipoib_workqueue);
694 }
695
696 ipoib_mcast_stop_thread(priv, flush);
697 ipoib_mcast_dev_flush(priv);
698
699 ipoib_flush_paths(priv);
700
701 return 0;
702 }
703
recvs_pending(struct ipoib_dev_priv * priv)704 static int recvs_pending(struct ipoib_dev_priv *priv)
705 {
706 int pending = 0;
707 int i;
708
709 for (i = 0; i < ipoib_recvq_size; ++i)
710 if (priv->rx_ring[i].mb)
711 ++pending;
712
713 return pending;
714 }
715
check_qp_movement_and_print(struct ipoib_dev_priv * priv,struct ib_qp * qp,enum ib_qp_state new_state)716 static void check_qp_movement_and_print(struct ipoib_dev_priv *priv,
717 struct ib_qp *qp,
718 enum ib_qp_state new_state)
719 {
720 struct ib_qp_attr qp_attr;
721 struct ib_qp_init_attr query_init_attr;
722 int ret;
723
724 ret = ib_query_qp(qp, &qp_attr, IB_QP_STATE, &query_init_attr);
725 if (ret) {
726 ipoib_warn(priv, "%s: Failed to query QP (%d)\n", __func__, ret);
727 return;
728 }
729
730 /* print according to the new-state and the previous state */
731 if (new_state == IB_QPS_ERR && qp_attr.qp_state == IB_QPS_RESET) {
732 ipoib_dbg(priv, "Failed to modify QP %d->%d, acceptable\n",
733 qp_attr.qp_state, new_state);
734 } else {
735 ipoib_warn(priv, "Failed to modify QP %d->%d\n",
736 qp_attr.qp_state, new_state);
737 }
738 }
739
ipoib_drain_cq(struct ipoib_dev_priv * priv)740 void ipoib_drain_cq(struct ipoib_dev_priv *priv)
741 {
742 int i, n;
743
744 spin_lock(&priv->drain_lock);
745 do {
746 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc);
747 for (i = 0; i < n; ++i) {
748 /*
749 * Convert any successful completions to flush
750 * errors to avoid passing packets up the
751 * stack after bringing the device down.
752 */
753 if (priv->ibwc[i].status == IB_WC_SUCCESS)
754 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;
755
756 if ((priv->ibwc[i].wr_id & IPOIB_OP_RECV) == 0)
757 panic("ipoib_drain_cq: Bad wrid 0x%jX\n",
758 (intmax_t)priv->ibwc[i].wr_id);
759 if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
760 ipoib_cm_handle_rx_wc(priv, priv->ibwc + i);
761 else
762 ipoib_ib_handle_rx_wc(priv, priv->ibwc + i);
763 }
764 } while (n == IPOIB_NUM_WC);
765 spin_unlock(&priv->drain_lock);
766
767 spin_lock(&priv->lock);
768 while (ipoib_poll_tx(priv, true))
769 ; /* nothing */
770
771 spin_unlock(&priv->lock);
772 }
773
ipoib_ib_dev_stop(struct ipoib_dev_priv * priv,int flush)774 int ipoib_ib_dev_stop(struct ipoib_dev_priv *priv, int flush)
775 {
776 struct ib_qp_attr qp_attr;
777 unsigned long begin;
778 struct ipoib_tx_buf *tx_req;
779 int i;
780
781 clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
782
783 ipoib_cm_dev_stop(priv);
784
785 /*
786 * Move our QP to the error state and then reinitialize in
787 * when all work requests have completed or have been flushed.
788 */
789 qp_attr.qp_state = IB_QPS_ERR;
790 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
791 check_qp_movement_and_print(priv, priv->qp, IB_QPS_ERR);
792
793 /* Wait for all sends and receives to complete */
794 begin = jiffies;
795
796 while (priv->tx_head != priv->tx_tail || recvs_pending(priv)) {
797 if (time_after(jiffies, begin + 5 * HZ)) {
798 ipoib_warn(priv, "timing out; %d sends %d receives not completed\n",
799 priv->tx_head - priv->tx_tail, recvs_pending(priv));
800
801 /*
802 * assume the HW is wedged and just free up
803 * all our pending work requests.
804 */
805 while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
806 tx_req = &priv->tx_ring[priv->tx_tail &
807 (ipoib_sendq_size - 1)];
808 ipoib_dma_unmap_tx(priv->ca, tx_req);
809 m_freem(tx_req->mb);
810 ++priv->tx_tail;
811 --priv->tx_outstanding;
812 }
813
814 for (i = 0; i < ipoib_recvq_size; ++i) {
815 struct ipoib_rx_buf *rx_req;
816
817 rx_req = &priv->rx_ring[i];
818 if (!rx_req->mb)
819 continue;
820 ipoib_dma_unmap_rx(priv, &priv->rx_ring[i]);
821 m_freem(rx_req->mb);
822 rx_req->mb = NULL;
823 }
824
825 goto timeout;
826 }
827
828 ipoib_drain_cq(priv);
829
830 msleep(1);
831 }
832
833 ipoib_dbg(priv, "All sends and receives done.\n");
834
835 timeout:
836 del_timer_sync(&priv->poll_timer);
837 qp_attr.qp_state = IB_QPS_RESET;
838 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
839 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
840
841 /* Wait for all AHs to be reaped */
842 set_bit(IPOIB_STOP_REAPER, &priv->flags);
843 cancel_delayed_work(&priv->ah_reap_task);
844 if (flush)
845 flush_workqueue(ipoib_workqueue);
846
847 ipoib_ah_dev_cleanup(priv);
848
849 ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP);
850
851 return 0;
852 }
853
ipoib_ib_dev_init(struct ipoib_dev_priv * priv,struct ib_device * ca,int port)854 int ipoib_ib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port)
855 {
856 struct ifnet *dev = priv->dev;
857
858 priv->ca = ca;
859 priv->port = port;
860 priv->qp = NULL;
861
862 if (ipoib_transport_dev_init(priv, ca)) {
863 printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name);
864 return -ENODEV;
865 }
866
867 setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func,
868 (unsigned long) priv);
869
870 if (dev->if_flags & IFF_UP) {
871 if (ipoib_ib_dev_open(priv)) {
872 ipoib_transport_dev_cleanup(priv);
873 return -ENODEV;
874 }
875 }
876
877 return 0;
878 }
879
__ipoib_ib_dev_flush(struct ipoib_dev_priv * priv,enum ipoib_flush_level level)880 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
881 enum ipoib_flush_level level)
882 {
883 struct ipoib_dev_priv *cpriv;
884 u16 new_index;
885
886 mutex_lock(&priv->vlan_mutex);
887
888 /*
889 * Flush any child interfaces too -- they might be up even if
890 * the parent is down.
891 */
892 list_for_each_entry(cpriv, &priv->child_intfs, list)
893 __ipoib_ib_dev_flush(cpriv, level);
894
895 mutex_unlock(&priv->vlan_mutex);
896
897 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) {
898 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
899 return;
900 }
901
902 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
903 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
904 return;
905 }
906
907 if (level == IPOIB_FLUSH_HEAVY) {
908 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) {
909 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
910 ipoib_ib_dev_down(priv, 0);
911 ipoib_ib_dev_stop(priv, 0);
912 if (ipoib_pkey_dev_delay_open(priv))
913 return;
914 }
915
916 /* restart QP only if P_Key index is changed */
917 if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
918 new_index == priv->pkey_index) {
919 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n");
920 return;
921 }
922 priv->pkey_index = new_index;
923 }
924
925 if (level == IPOIB_FLUSH_LIGHT) {
926 ipoib_mark_paths_invalid(priv);
927 ipoib_mcast_dev_flush(priv);
928 }
929
930 if (level >= IPOIB_FLUSH_NORMAL)
931 ipoib_ib_dev_down(priv, 0);
932
933 if (level == IPOIB_FLUSH_HEAVY) {
934 ipoib_ib_dev_stop(priv, 0);
935 ipoib_ib_dev_open(priv);
936 }
937
938 /*
939 * The device could have been brought down between the start and when
940 * we get here, don't bring it back up if it's not configured up
941 */
942 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
943 if (level >= IPOIB_FLUSH_NORMAL)
944 ipoib_ib_dev_up(priv);
945 ipoib_mcast_restart_task(&priv->restart_task);
946 }
947 }
948
ipoib_ib_dev_flush_light(struct work_struct * work)949 void ipoib_ib_dev_flush_light(struct work_struct *work)
950 {
951 struct ipoib_dev_priv *priv =
952 container_of(work, struct ipoib_dev_priv, flush_light);
953
954 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT);
955 }
956
ipoib_ib_dev_flush_normal(struct work_struct * work)957 void ipoib_ib_dev_flush_normal(struct work_struct *work)
958 {
959 struct ipoib_dev_priv *priv =
960 container_of(work, struct ipoib_dev_priv, flush_normal);
961
962 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL);
963 }
964
ipoib_ib_dev_flush_heavy(struct work_struct * work)965 void ipoib_ib_dev_flush_heavy(struct work_struct *work)
966 {
967 struct ipoib_dev_priv *priv =
968 container_of(work, struct ipoib_dev_priv, flush_heavy);
969
970 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY);
971 }
972
ipoib_ib_dev_cleanup(struct ipoib_dev_priv * priv)973 void ipoib_ib_dev_cleanup(struct ipoib_dev_priv *priv)
974 {
975
976 ipoib_dbg(priv, "cleaning up ib_dev\n");
977
978 ipoib_mcast_stop_thread(priv, 1);
979 ipoib_mcast_dev_flush(priv);
980
981 ipoib_ah_dev_cleanup(priv);
982 ipoib_transport_dev_cleanup(priv);
983 }
984
985 /*
986 * Delayed P_Key Assigment Interim Support
987 *
988 * The following is initial implementation of delayed P_Key assigment
989 * mechanism. It is using the same approach implemented for the multicast
990 * group join. The single goal of this implementation is to quickly address
991 * Bug #2507. This implementation will probably be removed when the P_Key
992 * change async notification is available.
993 */
994
ipoib_pkey_poll(struct work_struct * work)995 void ipoib_pkey_poll(struct work_struct *work)
996 {
997 struct ipoib_dev_priv *priv =
998 container_of(work, struct ipoib_dev_priv, pkey_poll_task.work);
999
1000 ipoib_pkey_dev_check_presence(priv);
1001
1002 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
1003 ipoib_open(priv);
1004 else {
1005 mutex_lock(&pkey_mutex);
1006 if (!test_bit(IPOIB_PKEY_STOP, &priv->flags))
1007 queue_delayed_work(ipoib_workqueue,
1008 &priv->pkey_poll_task,
1009 HZ);
1010 mutex_unlock(&pkey_mutex);
1011 }
1012 }
1013
ipoib_pkey_dev_delay_open(struct ipoib_dev_priv * priv)1014 int ipoib_pkey_dev_delay_open(struct ipoib_dev_priv *priv)
1015 {
1016
1017 /* Look for the interface pkey value in the IB Port P_Key table and */
1018 /* set the interface pkey assigment flag */
1019 ipoib_pkey_dev_check_presence(priv);
1020
1021 /* P_Key value not assigned yet - start polling */
1022 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
1023 mutex_lock(&pkey_mutex);
1024 clear_bit(IPOIB_PKEY_STOP, &priv->flags);
1025 queue_delayed_work(ipoib_workqueue,
1026 &priv->pkey_poll_task,
1027 HZ);
1028 mutex_unlock(&pkey_mutex);
1029 return 1;
1030 }
1031
1032 return 0;
1033 }
1034