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 <linux/delay.h>
37#include <linux/moduleparam.h>
38#include <linux/dma-mapping.h>
39#include <linux/slab.h>
40
41#include <linux/ip.h>
42#include <linux/tcp.h>
43#include <net/netdev_lock.h>
44#include <rdma/ib_cache.h>
45
46#include "ipoib.h"
47
48#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
49static int data_debug_level;
50
51module_param(data_debug_level, int, 0644);
52MODULE_PARM_DESC(data_debug_level,
53 "Enable data path debug tracing if > 0");
54#endif
55
56struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
57 struct ib_pd *pd, struct rdma_ah_attr *attr)
58{
59 struct ipoib_ah *ah;
60 struct ib_ah *vah;
61
62 ah = kmalloc(sizeof(*ah), GFP_KERNEL);
63 if (!ah)
64 return ERR_PTR(error: -ENOMEM);
65
66 ah->dev = dev;
67 ah->last_send = 0;
68 kref_init(kref: &ah->ref);
69
70 vah = rdma_create_ah(pd, ah_attr: attr, flags: RDMA_CREATE_AH_SLEEPABLE);
71 if (IS_ERR(ptr: vah)) {
72 kfree(objp: ah);
73 ah = (struct ipoib_ah *)vah;
74 } else {
75 ah->ah = vah;
76 ipoib_dbg(ipoib_priv(dev), "Created ah %p\n", ah->ah);
77 }
78
79 return ah;
80}
81
82void ipoib_free_ah(struct kref *kref)
83{
84 struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref);
85 struct ipoib_dev_priv *priv = ipoib_priv(dev: ah->dev);
86
87 unsigned long flags;
88
89 spin_lock_irqsave(&priv->lock, flags);
90 list_add_tail(new: &ah->list, head: &priv->dead_ahs);
91 spin_unlock_irqrestore(lock: &priv->lock, flags);
92}
93
94static void ipoib_ud_dma_unmap_rx(struct ipoib_dev_priv *priv,
95 u64 mapping[IPOIB_UD_RX_SG])
96{
97 ib_dma_unmap_single(dev: priv->ca, addr: mapping[0],
98 IPOIB_UD_BUF_SIZE(priv->max_ib_mtu),
99 direction: DMA_FROM_DEVICE);
100}
101
102static int ipoib_ib_post_receive(struct net_device *dev, int id)
103{
104 struct ipoib_dev_priv *priv = ipoib_priv(dev);
105 int ret;
106
107 priv->rx_wr.wr_id = id | IPOIB_OP_RECV;
108 priv->rx_sge[0].addr = priv->rx_ring[id].mapping[0];
109 priv->rx_sge[1].addr = priv->rx_ring[id].mapping[1];
110
111
112 ret = ib_post_recv(qp: priv->qp, recv_wr: &priv->rx_wr, NULL);
113 if (unlikely(ret)) {
114 ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret);
115 ipoib_ud_dma_unmap_rx(priv, mapping: priv->rx_ring[id].mapping);
116 dev_kfree_skb_any(skb: priv->rx_ring[id].skb);
117 priv->rx_ring[id].skb = NULL;
118 }
119
120 return ret;
121}
122
123static struct sk_buff *ipoib_alloc_rx_skb(struct net_device *dev, int id)
124{
125 struct ipoib_dev_priv *priv = ipoib_priv(dev);
126 struct sk_buff *skb;
127 int buf_size;
128 u64 *mapping;
129
130 buf_size = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
131
132 skb = dev_alloc_skb(length: buf_size + IPOIB_HARD_LEN);
133 if (unlikely(!skb))
134 return NULL;
135
136 /*
137 * the IP header will be at IPOIP_HARD_LEN + IB_GRH_BYTES, that is
138 * 64 bytes aligned
139 */
140 skb_reserve(skb, len: sizeof(struct ipoib_pseudo_header));
141
142 mapping = priv->rx_ring[id].mapping;
143 mapping[0] = ib_dma_map_single(dev: priv->ca, cpu_addr: skb->data, size: buf_size,
144 direction: DMA_FROM_DEVICE);
145 if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0])))
146 goto error;
147
148 priv->rx_ring[id].skb = skb;
149 return skb;
150error:
151 dev_kfree_skb_any(skb);
152 return NULL;
153}
154
155static int ipoib_ib_post_receives(struct net_device *dev)
156{
157 struct ipoib_dev_priv *priv = ipoib_priv(dev);
158 int i;
159
160 for (i = 0; i < ipoib_recvq_size; ++i) {
161 if (!ipoib_alloc_rx_skb(dev, id: i)) {
162 ipoib_warn(priv, "failed to allocate receive buffer %d\n", i);
163 return -ENOMEM;
164 }
165 if (ipoib_ib_post_receive(dev, id: i)) {
166 ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i);
167 return -EIO;
168 }
169 }
170
171 return 0;
172}
173
174static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
175{
176 struct ipoib_dev_priv *priv = ipoib_priv(dev);
177 unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV;
178 struct sk_buff *skb;
179 u64 mapping[IPOIB_UD_RX_SG];
180 union ib_gid *dgid;
181 union ib_gid *sgid;
182
183 ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n",
184 wr_id, wc->status);
185
186 if (unlikely(wr_id >= ipoib_recvq_size)) {
187 ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n",
188 wr_id, ipoib_recvq_size);
189 return;
190 }
191
192 skb = priv->rx_ring[wr_id].skb;
193
194 if (unlikely(wc->status != IB_WC_SUCCESS)) {
195 if (wc->status != IB_WC_WR_FLUSH_ERR)
196 ipoib_warn(priv,
197 "failed recv event (status=%d, wrid=%d vend_err %#x)\n",
198 wc->status, wr_id, wc->vendor_err);
199 ipoib_ud_dma_unmap_rx(priv, mapping: priv->rx_ring[wr_id].mapping);
200 dev_kfree_skb_any(skb);
201 priv->rx_ring[wr_id].skb = NULL;
202 return;
203 }
204
205 memcpy(mapping, priv->rx_ring[wr_id].mapping,
206 IPOIB_UD_RX_SG * sizeof(*mapping));
207
208 /*
209 * If we can't allocate a new RX buffer, dump
210 * this packet and reuse the old buffer.
211 */
212 if (unlikely(!ipoib_alloc_rx_skb(dev, wr_id))) {
213 ++dev->stats.rx_dropped;
214 goto repost;
215 }
216
217 ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
218 wc->byte_len, wc->slid);
219
220 ipoib_ud_dma_unmap_rx(priv, mapping);
221
222 skb_put(skb, len: wc->byte_len);
223
224 /* First byte of dgid signals multicast when 0xff */
225 dgid = &((struct ib_grh *)skb->data)->dgid;
226
227 if (!(wc->wc_flags & IB_WC_GRH) || dgid->raw[0] != 0xff)
228 skb->pkt_type = PACKET_HOST;
229 else if (memcmp(p: dgid, q: dev->broadcast + 4, size: sizeof(union ib_gid)) == 0)
230 skb->pkt_type = PACKET_BROADCAST;
231 else
232 skb->pkt_type = PACKET_MULTICAST;
233
234 sgid = &((struct ib_grh *)skb->data)->sgid;
235
236 /*
237 * Drop packets that this interface sent, ie multicast packets
238 * that the HCA has replicated.
239 */
240 if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num) {
241 int need_repost = 1;
242
243 if ((wc->wc_flags & IB_WC_GRH) &&
244 sgid->global.interface_id != priv->local_gid.global.interface_id)
245 need_repost = 0;
246
247 if (need_repost) {
248 dev_kfree_skb_any(skb);
249 goto repost;
250 }
251 }
252
253 skb_pull(skb, len: IB_GRH_BYTES);
254
255 skb->protocol = ((struct ipoib_header *) skb->data)->proto;
256 skb_add_pseudo_hdr(skb);
257
258 ++dev->stats.rx_packets;
259 dev->stats.rx_bytes += skb->len;
260 if (skb->pkt_type == PACKET_MULTICAST)
261 dev->stats.multicast++;
262
263 skb->dev = dev;
264 if ((dev->features & NETIF_F_RXCSUM) &&
265 likely(wc->wc_flags & IB_WC_IP_CSUM_OK))
266 skb->ip_summed = CHECKSUM_UNNECESSARY;
267
268 napi_gro_receive(napi: &priv->recv_napi, skb);
269
270repost:
271 if (unlikely(ipoib_ib_post_receive(dev, wr_id)))
272 ipoib_warn(priv, "ipoib_ib_post_receive failed "
273 "for buf %d\n", wr_id);
274}
275
276int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req)
277{
278 struct sk_buff *skb = tx_req->skb;
279 u64 *mapping = tx_req->mapping;
280 int i;
281 int off;
282
283 if (skb_headlen(skb)) {
284 mapping[0] = ib_dma_map_single(dev: ca, cpu_addr: skb->data, size: skb_headlen(skb),
285 direction: DMA_TO_DEVICE);
286 if (unlikely(ib_dma_mapping_error(ca, mapping[0])))
287 return -EIO;
288
289 off = 1;
290 } else
291 off = 0;
292
293 for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
294 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
295 mapping[i + off] = ib_dma_map_page(dev: ca,
296 page: skb_frag_page(frag),
297 offset: skb_frag_off(frag),
298 size: skb_frag_size(frag),
299 direction: DMA_TO_DEVICE);
300 if (unlikely(ib_dma_mapping_error(ca, mapping[i + off])))
301 goto partial_error;
302 }
303 return 0;
304
305partial_error:
306 for (; i > 0; --i) {
307 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
308
309 ib_dma_unmap_page(dev: ca, addr: mapping[i - !off], size: skb_frag_size(frag), direction: DMA_TO_DEVICE);
310 }
311
312 if (off)
313 ib_dma_unmap_single(dev: ca, addr: mapping[0], size: skb_headlen(skb), direction: DMA_TO_DEVICE);
314
315 return -EIO;
316}
317
318void ipoib_dma_unmap_tx(struct ipoib_dev_priv *priv,
319 struct ipoib_tx_buf *tx_req)
320{
321 struct sk_buff *skb = tx_req->skb;
322 u64 *mapping = tx_req->mapping;
323 int i;
324 int off;
325
326 if (skb_headlen(skb)) {
327 ib_dma_unmap_single(dev: priv->ca, addr: mapping[0], size: skb_headlen(skb),
328 direction: DMA_TO_DEVICE);
329 off = 1;
330 } else
331 off = 0;
332
333 for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
334 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
335
336 ib_dma_unmap_page(dev: priv->ca, addr: mapping[i + off],
337 size: skb_frag_size(frag), direction: DMA_TO_DEVICE);
338 }
339}
340
341/*
342 * As the result of a completion error the QP Can be transferred to SQE states.
343 * The function checks if the (send)QP is in SQE state and
344 * moves it back to RTS state, that in order to have it functional again.
345 */
346static void ipoib_qp_state_validate_work(struct work_struct *work)
347{
348 struct ipoib_qp_state_validate *qp_work =
349 container_of(work, struct ipoib_qp_state_validate, work);
350
351 struct ipoib_dev_priv *priv = qp_work->priv;
352 struct ib_qp_attr qp_attr;
353 struct ib_qp_init_attr query_init_attr;
354 int ret;
355
356 ret = ib_query_qp(qp: priv->qp, qp_attr: &qp_attr, qp_attr_mask: IB_QP_STATE, qp_init_attr: &query_init_attr);
357 if (ret) {
358 ipoib_warn(priv, "%s: Failed to query QP ret: %d\n",
359 __func__, ret);
360 goto free_res;
361 }
362 pr_info("%s: QP: 0x%x is in state: %d\n",
363 __func__, priv->qp->qp_num, qp_attr.qp_state);
364
365 /* currently support only in SQE->RTS transition*/
366 if (qp_attr.qp_state == IB_QPS_SQE) {
367 qp_attr.qp_state = IB_QPS_RTS;
368
369 ret = ib_modify_qp(qp: priv->qp, qp_attr: &qp_attr, qp_attr_mask: IB_QP_STATE);
370 if (ret) {
371 pr_warn("failed(%d) modify QP:0x%x SQE->RTS\n",
372 ret, priv->qp->qp_num);
373 goto free_res;
374 }
375 pr_info("%s: QP: 0x%x moved from IB_QPS_SQE to IB_QPS_RTS\n",
376 __func__, priv->qp->qp_num);
377 } else {
378 pr_warn("QP (%d) will stay in state: %d\n",
379 priv->qp->qp_num, qp_attr.qp_state);
380 }
381
382free_res:
383 kfree(objp: qp_work);
384}
385
386static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
387{
388 struct ipoib_dev_priv *priv = ipoib_priv(dev);
389 unsigned int wr_id = wc->wr_id;
390 struct ipoib_tx_buf *tx_req;
391
392 ipoib_dbg_data(priv, "send completion: id %d, status: %d\n",
393 wr_id, wc->status);
394
395 if (unlikely(wr_id >= ipoib_sendq_size)) {
396 ipoib_warn(priv, "send completion event with wrid %d (> %d)\n",
397 wr_id, ipoib_sendq_size);
398 return;
399 }
400
401 tx_req = &priv->tx_ring[wr_id];
402
403 ipoib_dma_unmap_tx(priv, tx_req);
404
405 ++dev->stats.tx_packets;
406 dev->stats.tx_bytes += tx_req->skb->len;
407
408 dev_kfree_skb_any(skb: tx_req->skb);
409
410 ++priv->tx_tail;
411 ++priv->global_tx_tail;
412
413 if (unlikely(netif_queue_stopped(dev) &&
414 ((priv->global_tx_head - priv->global_tx_tail) <=
415 ipoib_sendq_size >> 1) &&
416 test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)))
417 netif_wake_queue(dev);
418
419 if (wc->status != IB_WC_SUCCESS &&
420 wc->status != IB_WC_WR_FLUSH_ERR) {
421 struct ipoib_qp_state_validate *qp_work;
422 ipoib_warn(priv,
423 "failed send event (status=%d, wrid=%d vend_err %#x)\n",
424 wc->status, wr_id, wc->vendor_err);
425 qp_work = kzalloc(sizeof(*qp_work), GFP_ATOMIC);
426 if (!qp_work)
427 return;
428
429 INIT_WORK(&qp_work->work, ipoib_qp_state_validate_work);
430 qp_work->priv = priv;
431 queue_work(wq: priv->wq, work: &qp_work->work);
432 }
433}
434
435static int poll_tx(struct ipoib_dev_priv *priv)
436{
437 int n, i;
438 struct ib_wc *wc;
439
440 n = ib_poll_cq(cq: priv->send_cq, num_entries: MAX_SEND_CQE, wc: priv->send_wc);
441 for (i = 0; i < n; ++i) {
442 wc = priv->send_wc + i;
443 if (wc->wr_id & IPOIB_OP_CM)
444 ipoib_cm_handle_tx_wc(dev: priv->dev, wc: priv->send_wc + i);
445 else
446 ipoib_ib_handle_tx_wc(dev: priv->dev, wc: priv->send_wc + i);
447 }
448 return n == MAX_SEND_CQE;
449}
450
451int ipoib_rx_poll(struct napi_struct *napi, int budget)
452{
453 struct ipoib_dev_priv *priv =
454 container_of(napi, struct ipoib_dev_priv, recv_napi);
455 struct net_device *dev = priv->dev;
456 int done;
457 int t;
458 int n, i;
459
460 done = 0;
461
462poll_more:
463 while (done < budget) {
464 int max = (budget - done);
465
466 t = min(IPOIB_NUM_WC, max);
467 n = ib_poll_cq(cq: priv->recv_cq, num_entries: t, wc: priv->ibwc);
468
469 for (i = 0; i < n; i++) {
470 struct ib_wc *wc = priv->ibwc + i;
471
472 if (wc->wr_id & IPOIB_OP_RECV) {
473 ++done;
474 if (wc->wr_id & IPOIB_OP_CM)
475 ipoib_cm_handle_rx_wc(dev, wc);
476 else
477 ipoib_ib_handle_rx_wc(dev, wc);
478 } else {
479 pr_warn("%s: Got unexpected wqe id\n", __func__);
480 }
481 }
482
483 if (n != t)
484 break;
485 }
486
487 if (done < budget) {
488 napi_complete(n: napi);
489 if (unlikely(ib_req_notify_cq(priv->recv_cq,
490 IB_CQ_NEXT_COMP |
491 IB_CQ_REPORT_MISSED_EVENTS)) &&
492 napi_schedule(n: napi))
493 goto poll_more;
494 }
495
496 return done;
497}
498
499int ipoib_tx_poll(struct napi_struct *napi, int budget)
500{
501 struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv,
502 send_napi);
503 struct net_device *dev = priv->dev;
504 int n, i;
505 struct ib_wc *wc;
506
507poll_more:
508 n = ib_poll_cq(cq: priv->send_cq, num_entries: MAX_SEND_CQE, wc: priv->send_wc);
509
510 for (i = 0; i < n; i++) {
511 wc = priv->send_wc + i;
512 if (wc->wr_id & IPOIB_OP_CM)
513 ipoib_cm_handle_tx_wc(dev, wc);
514 else
515 ipoib_ib_handle_tx_wc(dev, wc);
516 }
517
518 if (n < budget) {
519 napi_complete(n: napi);
520 if (unlikely(ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP |
521 IB_CQ_REPORT_MISSED_EVENTS)) &&
522 napi_schedule(n: napi))
523 goto poll_more;
524 }
525 return n < 0 ? 0 : n;
526}
527
528void ipoib_ib_rx_completion(struct ib_cq *cq, void *ctx_ptr)
529{
530 struct ipoib_dev_priv *priv = ctx_ptr;
531
532 napi_schedule(n: &priv->recv_napi);
533}
534
535/* The function will force napi_schedule */
536void ipoib_napi_schedule_work(struct work_struct *work)
537{
538 struct ipoib_dev_priv *priv =
539 container_of(work, struct ipoib_dev_priv, reschedule_napi_work);
540 bool ret;
541
542 do {
543 ret = napi_schedule(n: &priv->send_napi);
544 if (!ret)
545 msleep(msecs: 3);
546 } while (!ret && netif_queue_stopped(dev: priv->dev) &&
547 test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags));
548}
549
550void ipoib_ib_tx_completion(struct ib_cq *cq, void *ctx_ptr)
551{
552 struct ipoib_dev_priv *priv = ctx_ptr;
553 bool ret;
554
555 ret = napi_schedule(n: &priv->send_napi);
556 /*
557 * if the queue is closed the driver must be able to schedule napi,
558 * otherwise we can end with closed queue forever, because no new
559 * packets to send and napi callback might not get new event after
560 * its re-arm of the napi.
561 */
562 if (!ret && netif_queue_stopped(dev: priv->dev))
563 schedule_work(work: &priv->reschedule_napi_work);
564}
565
566static inline int post_send(struct ipoib_dev_priv *priv,
567 unsigned int wr_id,
568 struct ib_ah *address, u32 dqpn,
569 struct ipoib_tx_buf *tx_req,
570 void *head, int hlen)
571{
572 struct sk_buff *skb = tx_req->skb;
573
574 ipoib_build_sge(priv, tx_req);
575
576 priv->tx_wr.wr.wr_id = wr_id;
577 priv->tx_wr.remote_qpn = dqpn;
578 priv->tx_wr.ah = address;
579
580 if (head) {
581 priv->tx_wr.mss = skb_shinfo(skb)->gso_size;
582 priv->tx_wr.header = head;
583 priv->tx_wr.hlen = hlen;
584 priv->tx_wr.wr.opcode = IB_WR_LSO;
585 } else
586 priv->tx_wr.wr.opcode = IB_WR_SEND;
587
588 return ib_post_send(qp: priv->qp, send_wr: &priv->tx_wr.wr, NULL);
589}
590
591int ipoib_send(struct net_device *dev, struct sk_buff *skb,
592 struct ib_ah *address, u32 dqpn)
593{
594 struct ipoib_dev_priv *priv = ipoib_priv(dev);
595 struct ipoib_tx_buf *tx_req;
596 int hlen, rc;
597 void *phead;
598 unsigned int usable_sge = priv->max_send_sge - !!skb_headlen(skb);
599
600 if (skb_is_gso(skb)) {
601 hlen = skb_tcp_all_headers(skb);
602 phead = skb->data;
603 if (unlikely(!skb_pull(skb, hlen))) {
604 ipoib_warn(priv, "linear data too small\n");
605 ++dev->stats.tx_dropped;
606 ++dev->stats.tx_errors;
607 dev_kfree_skb_any(skb);
608 return -1;
609 }
610 } else {
611 if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) {
612 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
613 skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN);
614 ++dev->stats.tx_dropped;
615 ++dev->stats.tx_errors;
616 ipoib_cm_skb_too_long(dev, skb, mtu: priv->mcast_mtu);
617 return -1;
618 }
619 phead = NULL;
620 hlen = 0;
621 }
622 if (skb_shinfo(skb)->nr_frags > usable_sge) {
623 if (skb_linearize(skb) < 0) {
624 ipoib_warn(priv, "skb could not be linearized\n");
625 ++dev->stats.tx_dropped;
626 ++dev->stats.tx_errors;
627 dev_kfree_skb_any(skb);
628 return -1;
629 }
630 /* Does skb_linearize return ok without reducing nr_frags? */
631 if (skb_shinfo(skb)->nr_frags > usable_sge) {
632 ipoib_warn(priv, "too many frags after skb linearize\n");
633 ++dev->stats.tx_dropped;
634 ++dev->stats.tx_errors;
635 dev_kfree_skb_any(skb);
636 return -1;
637 }
638 }
639
640 ipoib_dbg_data(priv,
641 "sending packet, length=%d address=%p dqpn=0x%06x\n",
642 skb->len, address, dqpn);
643
644 /*
645 * We put the skb into the tx_ring _before_ we call post_send()
646 * because it's entirely possible that the completion handler will
647 * run before we execute anything after the post_send(). That
648 * means we have to make sure everything is properly recorded and
649 * our state is consistent before we call post_send().
650 */
651 tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
652 tx_req->skb = skb;
653 if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) {
654 ++dev->stats.tx_errors;
655 dev_kfree_skb_any(skb);
656 return -1;
657 }
658
659 if (skb->ip_summed == CHECKSUM_PARTIAL)
660 priv->tx_wr.wr.send_flags |= IB_SEND_IP_CSUM;
661 else
662 priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM;
663 /* increase the tx_head after send success, but use it for queue state */
664 if ((priv->global_tx_head - priv->global_tx_tail) ==
665 ipoib_sendq_size - 1) {
666 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
667 netif_stop_queue(dev);
668 }
669
670 skb_orphan(skb);
671 skb_dst_drop(skb);
672
673 if (netif_queue_stopped(dev))
674 if (ib_req_notify_cq(cq: priv->send_cq, flags: IB_CQ_NEXT_COMP |
675 IB_CQ_REPORT_MISSED_EVENTS) < 0)
676 ipoib_warn(priv, "request notify on send CQ failed\n");
677
678 rc = post_send(priv, wr_id: priv->tx_head & (ipoib_sendq_size - 1),
679 address, dqpn, tx_req, head: phead, hlen);
680 if (unlikely(rc)) {
681 ipoib_warn(priv, "post_send failed, error %d\n", rc);
682 ++dev->stats.tx_errors;
683 ipoib_dma_unmap_tx(priv, tx_req);
684 dev_kfree_skb_any(skb);
685 if (netif_queue_stopped(dev))
686 netif_wake_queue(dev);
687 rc = 0;
688 } else {
689 netif_trans_update(dev);
690
691 rc = priv->tx_head;
692 ++priv->tx_head;
693 ++priv->global_tx_head;
694 }
695 return rc;
696}
697
698static void ipoib_reap_dead_ahs(struct ipoib_dev_priv *priv)
699{
700 struct ipoib_ah *ah, *tah;
701 unsigned long flags;
702
703 netif_tx_lock_bh(dev: priv->dev);
704 spin_lock_irqsave(&priv->lock, flags);
705
706 list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
707 if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
708 list_del(entry: &ah->list);
709 rdma_destroy_ah(ah: ah->ah, flags: 0);
710 kfree(objp: ah);
711 }
712
713 spin_unlock_irqrestore(lock: &priv->lock, flags);
714 netif_tx_unlock_bh(dev: priv->dev);
715}
716
717void ipoib_reap_ah(struct work_struct *work)
718{
719 struct ipoib_dev_priv *priv =
720 container_of(work, struct ipoib_dev_priv, ah_reap_task.work);
721
722 ipoib_reap_dead_ahs(priv);
723
724 if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
725 queue_delayed_work(wq: priv->wq, dwork: &priv->ah_reap_task,
726 delay: round_jiffies_relative(HZ));
727}
728
729static void ipoib_start_ah_reaper(struct ipoib_dev_priv *priv)
730{
731 clear_bit(nr: IPOIB_STOP_REAPER, addr: &priv->flags);
732 queue_delayed_work(wq: priv->wq, dwork: &priv->ah_reap_task,
733 delay: round_jiffies_relative(HZ));
734}
735
736static void ipoib_stop_ah_reaper(struct ipoib_dev_priv *priv)
737{
738 set_bit(nr: IPOIB_STOP_REAPER, addr: &priv->flags);
739 cancel_delayed_work(dwork: &priv->ah_reap_task);
740 /*
741 * After ipoib_stop_ah_reaper() we always go through
742 * ipoib_reap_dead_ahs() which ensures the work is really stopped and
743 * does a final flush out of the dead_ah's list
744 */
745}
746
747static int recvs_pending(struct net_device *dev)
748{
749 struct ipoib_dev_priv *priv = ipoib_priv(dev);
750 int pending = 0;
751 int i;
752
753 for (i = 0; i < ipoib_recvq_size; ++i)
754 if (priv->rx_ring[i].skb)
755 ++pending;
756
757 return pending;
758}
759
760static void check_qp_movement_and_print(struct ipoib_dev_priv *priv,
761 struct ib_qp *qp,
762 enum ib_qp_state new_state)
763{
764 struct ib_qp_attr qp_attr;
765 struct ib_qp_init_attr query_init_attr;
766 int ret;
767
768 ret = ib_query_qp(qp, qp_attr: &qp_attr, qp_attr_mask: IB_QP_STATE, qp_init_attr: &query_init_attr);
769 if (ret) {
770 ipoib_warn(priv, "%s: Failed to query QP\n", __func__);
771 return;
772 }
773 /* print according to the new-state and the previous state.*/
774 if (new_state == IB_QPS_ERR && qp_attr.qp_state == IB_QPS_RESET)
775 ipoib_dbg(priv, "Failed modify QP, IB_QPS_RESET to IB_QPS_ERR, acceptable\n");
776 else
777 ipoib_warn(priv, "Failed to modify QP to state: %d from state: %d\n",
778 new_state, qp_attr.qp_state);
779}
780
781static void ipoib_napi_enable(struct net_device *dev)
782{
783 struct ipoib_dev_priv *priv = ipoib_priv(dev);
784
785 netdev_lock_ops_to_full(dev);
786 napi_enable_locked(n: &priv->recv_napi);
787 napi_enable_locked(n: &priv->send_napi);
788 netdev_unlock_full_to_ops(dev);
789}
790
791static void ipoib_napi_disable(struct net_device *dev)
792{
793 struct ipoib_dev_priv *priv = ipoib_priv(dev);
794
795 netdev_lock_ops_to_full(dev);
796 napi_disable_locked(n: &priv->recv_napi);
797 napi_disable_locked(n: &priv->send_napi);
798 netdev_unlock_full_to_ops(dev);
799}
800
801int ipoib_ib_dev_stop_default(struct net_device *dev)
802{
803 struct ipoib_dev_priv *priv = ipoib_priv(dev);
804 struct ib_qp_attr qp_attr;
805 unsigned long begin;
806 struct ipoib_tx_buf *tx_req;
807 int i;
808
809 if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
810 ipoib_napi_disable(dev);
811
812 ipoib_cm_dev_stop(dev);
813
814 /*
815 * Move our QP to the error state and then reinitialize in
816 * when all work requests have completed or have been flushed.
817 */
818 qp_attr.qp_state = IB_QPS_ERR;
819 if (ib_modify_qp(qp: priv->qp, qp_attr: &qp_attr, qp_attr_mask: IB_QP_STATE))
820 check_qp_movement_and_print(priv, qp: priv->qp, new_state: IB_QPS_ERR);
821
822 /* Wait for all sends and receives to complete */
823 begin = jiffies;
824
825 while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) {
826 if (time_after(jiffies, begin + 5 * HZ)) {
827 ipoib_warn(priv,
828 "timing out; %d sends %d receives not completed\n",
829 priv->tx_head - priv->tx_tail,
830 recvs_pending(dev));
831
832 /*
833 * assume the HW is wedged and just free up
834 * all our pending work requests.
835 */
836 while ((int)priv->tx_tail - (int)priv->tx_head < 0) {
837 tx_req = &priv->tx_ring[priv->tx_tail &
838 (ipoib_sendq_size - 1)];
839 ipoib_dma_unmap_tx(priv, tx_req);
840 dev_kfree_skb_any(skb: tx_req->skb);
841 ++priv->tx_tail;
842 ++priv->global_tx_tail;
843 }
844
845 for (i = 0; i < ipoib_recvq_size; ++i) {
846 struct ipoib_rx_buf *rx_req;
847
848 rx_req = &priv->rx_ring[i];
849 if (!rx_req->skb)
850 continue;
851 ipoib_ud_dma_unmap_rx(priv,
852 mapping: priv->rx_ring[i].mapping);
853 dev_kfree_skb_any(skb: rx_req->skb);
854 rx_req->skb = NULL;
855 }
856
857 goto timeout;
858 }
859
860 ipoib_drain_cq(dev);
861
862 usleep_range(min: 1000, max: 2000);
863 }
864
865 ipoib_dbg(priv, "All sends and receives done.\n");
866
867timeout:
868 qp_attr.qp_state = IB_QPS_RESET;
869 if (ib_modify_qp(qp: priv->qp, qp_attr: &qp_attr, qp_attr_mask: IB_QP_STATE))
870 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
871
872 ib_req_notify_cq(cq: priv->recv_cq, flags: IB_CQ_NEXT_COMP);
873
874 return 0;
875}
876
877int ipoib_ib_dev_open_default(struct net_device *dev)
878{
879 struct ipoib_dev_priv *priv = ipoib_priv(dev);
880 int ret;
881
882 ret = ipoib_init_qp(dev);
883 if (ret) {
884 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
885 return -1;
886 }
887
888 ret = ipoib_ib_post_receives(dev);
889 if (ret) {
890 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
891 goto out;
892 }
893
894 ret = ipoib_cm_dev_open(dev);
895 if (ret) {
896 ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret);
897 goto out;
898 }
899
900 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
901 ipoib_napi_enable(dev);
902
903 return 0;
904out:
905 return -1;
906}
907
908int ipoib_ib_dev_open(struct net_device *dev)
909{
910 struct ipoib_dev_priv *priv = ipoib_priv(dev);
911
912 ipoib_pkey_dev_check_presence(dev);
913
914 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
915 ipoib_warn(priv, "P_Key 0x%04x is %s\n", priv->pkey,
916 (!(priv->pkey & 0x7fff) ? "Invalid" : "not found"));
917 return -1;
918 }
919
920 ipoib_start_ah_reaper(priv);
921 if (priv->rn_ops->ndo_open(dev)) {
922 pr_warn("%s: Failed to open dev\n", dev->name);
923 goto dev_stop;
924 }
925
926 set_bit(nr: IPOIB_FLAG_INITIALIZED, addr: &priv->flags);
927
928 return 0;
929
930dev_stop:
931 ipoib_stop_ah_reaper(priv);
932 return -1;
933}
934
935void ipoib_ib_dev_stop(struct net_device *dev)
936{
937 struct ipoib_dev_priv *priv = ipoib_priv(dev);
938
939 priv->rn_ops->ndo_stop(dev);
940
941 clear_bit(nr: IPOIB_FLAG_INITIALIZED, addr: &priv->flags);
942 ipoib_stop_ah_reaper(priv);
943}
944
945void ipoib_pkey_dev_check_presence(struct net_device *dev)
946{
947 struct ipoib_dev_priv *priv = ipoib_priv(dev);
948 struct rdma_netdev *rn = netdev_priv(dev);
949
950 if (!(priv->pkey & 0x7fff) ||
951 ib_find_pkey(device: priv->ca, port_num: priv->port, pkey: priv->pkey,
952 index: &priv->pkey_index)) {
953 clear_bit(nr: IPOIB_PKEY_ASSIGNED, addr: &priv->flags);
954 } else {
955 if (rn->set_id)
956 rn->set_id(dev, priv->pkey_index);
957 set_bit(nr: IPOIB_PKEY_ASSIGNED, addr: &priv->flags);
958 }
959}
960
961void ipoib_ib_dev_up(struct net_device *dev)
962{
963 struct ipoib_dev_priv *priv = ipoib_priv(dev);
964
965 ipoib_pkey_dev_check_presence(dev);
966
967 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
968 ipoib_dbg(priv, "PKEY is not assigned.\n");
969 return;
970 }
971
972 set_bit(nr: IPOIB_FLAG_OPER_UP, addr: &priv->flags);
973
974 ipoib_mcast_start_thread(dev);
975}
976
977void ipoib_ib_dev_down(struct net_device *dev)
978{
979 struct ipoib_dev_priv *priv = ipoib_priv(dev);
980
981 ipoib_dbg(priv, "downing ib_dev\n");
982
983 clear_bit(nr: IPOIB_FLAG_OPER_UP, addr: &priv->flags);
984 netif_carrier_off(dev);
985
986 ipoib_mcast_stop_thread(dev);
987 ipoib_mcast_dev_flush(dev);
988
989 ipoib_flush_paths(dev);
990}
991
992void ipoib_drain_cq(struct net_device *dev)
993{
994 struct ipoib_dev_priv *priv = ipoib_priv(dev);
995 int i, n;
996
997 /*
998 * We call completion handling routines that expect to be
999 * called from the BH-disabled NAPI poll context, so disable
1000 * BHs here too.
1001 */
1002 local_bh_disable();
1003
1004 do {
1005 n = ib_poll_cq(cq: priv->recv_cq, num_entries: IPOIB_NUM_WC, wc: priv->ibwc);
1006 for (i = 0; i < n; ++i) {
1007 /*
1008 * Convert any successful completions to flush
1009 * errors to avoid passing packets up the
1010 * stack after bringing the device down.
1011 */
1012 if (priv->ibwc[i].status == IB_WC_SUCCESS)
1013 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;
1014
1015 if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) {
1016 if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
1017 ipoib_cm_handle_rx_wc(dev, wc: priv->ibwc + i);
1018 else
1019 ipoib_ib_handle_rx_wc(dev, wc: priv->ibwc + i);
1020 } else {
1021 pr_warn("%s: Got unexpected wqe id\n", __func__);
1022 }
1023 }
1024 } while (n == IPOIB_NUM_WC);
1025
1026 while (poll_tx(priv))
1027 ; /* nothing */
1028
1029 local_bh_enable();
1030}
1031
1032/*
1033 * Takes whatever value which is in pkey index 0 and updates priv->pkey
1034 * returns 0 if the pkey value was changed.
1035 */
1036static inline int update_parent_pkey(struct ipoib_dev_priv *priv)
1037{
1038 int result;
1039 u16 prev_pkey;
1040
1041 prev_pkey = priv->pkey;
1042 result = ib_query_pkey(device: priv->ca, port_num: priv->port, index: 0, pkey: &priv->pkey);
1043 if (result) {
1044 ipoib_warn(priv, "ib_query_pkey port %d failed (ret = %d)\n",
1045 priv->port, result);
1046 return result;
1047 }
1048
1049 priv->pkey |= 0x8000;
1050
1051 if (prev_pkey != priv->pkey) {
1052 ipoib_dbg(priv, "pkey changed from 0x%x to 0x%x\n",
1053 prev_pkey, priv->pkey);
1054 /*
1055 * Update the pkey in the broadcast address, while making sure to set
1056 * the full membership bit, so that we join the right broadcast group.
1057 */
1058 priv->dev->broadcast[8] = priv->pkey >> 8;
1059 priv->dev->broadcast[9] = priv->pkey & 0xff;
1060 return 0;
1061 }
1062
1063 return 1;
1064}
1065/*
1066 * returns 0 if pkey value was found in a different slot.
1067 */
1068static inline int update_child_pkey(struct ipoib_dev_priv *priv)
1069{
1070 u16 old_index = priv->pkey_index;
1071
1072 priv->pkey_index = 0;
1073 ipoib_pkey_dev_check_presence(dev: priv->dev);
1074
1075 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
1076 (old_index == priv->pkey_index))
1077 return 1;
1078 return 0;
1079}
1080
1081/*
1082 * returns true if the device address of the ipoib interface has changed and the
1083 * new address is a valid one (i.e in the gid table), return false otherwise.
1084 */
1085static bool ipoib_dev_addr_changed_valid(struct ipoib_dev_priv *priv)
1086{
1087 union ib_gid search_gid;
1088 union ib_gid gid0;
1089 int err;
1090 u16 index;
1091 u32 port;
1092 bool ret = false;
1093
1094 if (rdma_query_gid(device: priv->ca, port_num: priv->port, index: 0, gid: &gid0))
1095 return false;
1096
1097 netif_addr_lock_bh(dev: priv->dev);
1098
1099 /* The subnet prefix may have changed, update it now so we won't have
1100 * to do it later
1101 */
1102 priv->local_gid.global.subnet_prefix = gid0.global.subnet_prefix;
1103 dev_addr_mod(dev: priv->dev, offset: 4, addr: (u8 *)&gid0.global.subnet_prefix,
1104 len: sizeof(gid0.global.subnet_prefix));
1105 search_gid.global.subnet_prefix = gid0.global.subnet_prefix;
1106
1107 search_gid.global.interface_id = priv->local_gid.global.interface_id;
1108
1109 netif_addr_unlock_bh(dev: priv->dev);
1110
1111 err = ib_find_gid(device: priv->ca, gid: &search_gid, port_num: &port, index: &index);
1112
1113 netif_addr_lock_bh(dev: priv->dev);
1114
1115 if (search_gid.global.interface_id !=
1116 priv->local_gid.global.interface_id)
1117 /* There was a change while we were looking up the gid, bail
1118 * here and let the next work sort this out
1119 */
1120 goto out;
1121
1122 /* The next section of code needs some background:
1123 * Per IB spec the port GUID can't change if the HCA is powered on.
1124 * port GUID is the basis for GID at index 0 which is the basis for
1125 * the default device address of a ipoib interface.
1126 *
1127 * so it seems the flow should be:
1128 * if user_changed_dev_addr && gid in gid tbl
1129 * set bit dev_addr_set
1130 * return true
1131 * else
1132 * return false
1133 *
1134 * The issue is that there are devices that don't follow the spec,
1135 * they change the port GUID when the HCA is powered, so in order
1136 * not to break userspace applications, We need to check if the
1137 * user wanted to control the device address and we assume that
1138 * if he sets the device address back to be based on GID index 0,
1139 * he no longer wishs to control it.
1140 *
1141 * If the user doesn't control the device address,
1142 * IPOIB_FLAG_DEV_ADDR_SET is set and ib_find_gid failed it means
1143 * the port GUID has changed and GID at index 0 has changed
1144 * so we need to change priv->local_gid and priv->dev->dev_addr
1145 * to reflect the new GID.
1146 */
1147 if (!test_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags)) {
1148 if (!err && port == priv->port) {
1149 set_bit(nr: IPOIB_FLAG_DEV_ADDR_SET, addr: &priv->flags);
1150 if (index == 0)
1151 clear_bit(nr: IPOIB_FLAG_DEV_ADDR_CTRL,
1152 addr: &priv->flags);
1153 else
1154 set_bit(nr: IPOIB_FLAG_DEV_ADDR_CTRL, addr: &priv->flags);
1155 ret = true;
1156 } else {
1157 ret = false;
1158 }
1159 } else {
1160 if (!err && port == priv->port) {
1161 ret = true;
1162 } else {
1163 if (!test_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags)) {
1164 memcpy(&priv->local_gid, &gid0,
1165 sizeof(priv->local_gid));
1166 dev_addr_mod(dev: priv->dev, offset: 4, addr: (u8 *)&gid0,
1167 len: sizeof(priv->local_gid));
1168 ret = true;
1169 }
1170 }
1171 }
1172
1173out:
1174 netif_addr_unlock_bh(dev: priv->dev);
1175
1176 return ret;
1177}
1178
1179static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
1180 enum ipoib_flush_level level)
1181{
1182 struct net_device *dev = priv->dev;
1183 int result;
1184
1185 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) &&
1186 level != IPOIB_FLUSH_HEAVY) {
1187 /* Make sure the dev_addr is set even if not flushing */
1188 if (level == IPOIB_FLUSH_LIGHT)
1189 ipoib_dev_addr_changed_valid(priv);
1190 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
1191 return;
1192 }
1193
1194 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
1195 /* interface is down. update pkey and leave. */
1196 if (level == IPOIB_FLUSH_HEAVY) {
1197 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags))
1198 update_parent_pkey(priv);
1199 else
1200 update_child_pkey(priv);
1201 } else if (level == IPOIB_FLUSH_LIGHT)
1202 ipoib_dev_addr_changed_valid(priv);
1203 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
1204 return;
1205 }
1206
1207 if (level == IPOIB_FLUSH_HEAVY) {
1208 /* child devices chase their origin pkey value, while non-child
1209 * (parent) devices should always takes what present in pkey index 0
1210 */
1211 if (test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
1212 result = update_child_pkey(priv);
1213 if (result) {
1214 /* restart QP only if P_Key index is changed */
1215 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n");
1216 return;
1217 }
1218
1219 } else {
1220 result = update_parent_pkey(priv);
1221 /* restart QP only if P_Key value changed */
1222 if (result) {
1223 ipoib_dbg(priv, "Not flushing - P_Key value not changed.\n");
1224 return;
1225 }
1226 }
1227 }
1228
1229 if (level == IPOIB_FLUSH_LIGHT) {
1230 int oper_up;
1231 ipoib_mark_paths_invalid(dev);
1232 /* Set IPoIB operation as down to prevent races between:
1233 * the flush flow which leaves MCG and on the fly joins
1234 * which can happen during that time. mcast restart task
1235 * should deal with join requests we missed.
1236 */
1237 oper_up = test_and_clear_bit(nr: IPOIB_FLAG_OPER_UP, addr: &priv->flags);
1238 ipoib_mcast_dev_flush(dev);
1239 if (oper_up)
1240 set_bit(nr: IPOIB_FLAG_OPER_UP, addr: &priv->flags);
1241 ipoib_reap_dead_ahs(priv);
1242 }
1243
1244 if (level >= IPOIB_FLUSH_NORMAL)
1245 ipoib_ib_dev_down(dev);
1246
1247 if (level == IPOIB_FLUSH_HEAVY) {
1248 netdev_lock_ops(dev);
1249 if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
1250 ipoib_ib_dev_stop(dev);
1251
1252 result = ipoib_ib_dev_open(dev);
1253 netdev_unlock_ops(dev);
1254
1255 if (result)
1256 return;
1257
1258 if (netif_queue_stopped(dev))
1259 netif_start_queue(dev);
1260 }
1261
1262 /*
1263 * The device could have been brought down between the start and when
1264 * we get here, don't bring it back up if it's not configured up
1265 */
1266 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
1267 if (level >= IPOIB_FLUSH_NORMAL)
1268 ipoib_ib_dev_up(dev);
1269 if (ipoib_dev_addr_changed_valid(priv))
1270 ipoib_mcast_restart_task(work: &priv->restart_task);
1271 }
1272}
1273
1274void ipoib_ib_dev_flush_light(struct work_struct *work)
1275{
1276 struct ipoib_dev_priv *priv =
1277 container_of(work, struct ipoib_dev_priv, flush_light);
1278
1279 __ipoib_ib_dev_flush(priv, level: IPOIB_FLUSH_LIGHT);
1280}
1281
1282void ipoib_ib_dev_flush_normal(struct work_struct *work)
1283{
1284 struct ipoib_dev_priv *priv =
1285 container_of(work, struct ipoib_dev_priv, flush_normal);
1286
1287 __ipoib_ib_dev_flush(priv, level: IPOIB_FLUSH_NORMAL);
1288}
1289
1290void ipoib_ib_dev_flush_heavy(struct work_struct *work)
1291{
1292 struct ipoib_dev_priv *priv =
1293 container_of(work, struct ipoib_dev_priv, flush_heavy);
1294
1295 rtnl_lock();
1296 __ipoib_ib_dev_flush(priv, level: IPOIB_FLUSH_HEAVY);
1297 rtnl_unlock();
1298}
1299
1300void ipoib_queue_work(struct ipoib_dev_priv *priv,
1301 enum ipoib_flush_level level)
1302{
1303 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
1304 struct ipoib_dev_priv *cpriv;
1305
1306 netdev_lock(dev: priv->dev);
1307 list_for_each_entry(cpriv, &priv->child_intfs, list)
1308 ipoib_queue_work(priv: cpriv, level);
1309 netdev_unlock(dev: priv->dev);
1310 }
1311
1312 switch (level) {
1313 case IPOIB_FLUSH_LIGHT:
1314 queue_work(wq: ipoib_workqueue, work: &priv->flush_light);
1315 break;
1316 case IPOIB_FLUSH_NORMAL:
1317 queue_work(wq: ipoib_workqueue, work: &priv->flush_normal);
1318 break;
1319 case IPOIB_FLUSH_HEAVY:
1320 queue_work(wq: ipoib_workqueue, work: &priv->flush_heavy);
1321 break;
1322 }
1323}
1324
1325void ipoib_ib_dev_cleanup(struct net_device *dev)
1326{
1327 struct ipoib_dev_priv *priv = ipoib_priv(dev);
1328
1329 ipoib_dbg(priv, "cleaning up ib_dev\n");
1330 /*
1331 * We must make sure there are no more (path) completions
1332 * that may wish to touch priv fields that are no longer valid
1333 */
1334 ipoib_flush_paths(dev);
1335
1336 ipoib_mcast_stop_thread(dev);
1337 ipoib_mcast_dev_flush(dev);
1338
1339 /*
1340 * All of our ah references aren't free until after
1341 * ipoib_mcast_dev_flush(), ipoib_flush_paths, and
1342 * the neighbor garbage collection is stopped and reaped.
1343 * That should all be done now, so make a final ah flush.
1344 */
1345 ipoib_reap_dead_ahs(priv);
1346
1347 clear_bit(nr: IPOIB_PKEY_ASSIGNED, addr: &priv->flags);
1348
1349 priv->rn_ops->ndo_uninit(dev);
1350
1351 if (priv->pd) {
1352 ib_dealloc_pd(pd: priv->pd);
1353 priv->pd = NULL;
1354 }
1355}
1356
1357

source code of linux/drivers/infiniband/ulp/ipoib/ipoib_ib.c