Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. | |
2a1d9b7f RD |
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. | |
1da177e4 LT |
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 | * $Id: ipoib_ib.c 1386 2004-12-27 16:23:17Z roland $ | |
36 | */ | |
37 | ||
38 | #include <linux/delay.h> | |
39 | #include <linux/dma-mapping.h> | |
40 | ||
a4d61e84 | 41 | #include <rdma/ib_cache.h> |
1da177e4 LT |
42 | |
43 | #include "ipoib.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 | ||
95ed644f | 53 | static DEFINE_MUTEX(pkey_mutex); |
1da177e4 LT |
54 | |
55 | struct ipoib_ah *ipoib_create_ah(struct net_device *dev, | |
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->dev = dev; | |
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(netdev_priv(dev), "Created ah %p\n", ah->ah); | |
74 | ||
75 | return ah; | |
76 | } | |
77 | ||
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 = netdev_priv(ah->dev); | |
82 | ||
83 | unsigned long flags; | |
84 | ||
31c02e21 RD |
85 | spin_lock_irqsave(&priv->lock, flags); |
86 | list_add_tail(&ah->list, &priv->dead_ahs); | |
87 | spin_unlock_irqrestore(&priv->lock, flags); | |
1da177e4 LT |
88 | } |
89 | ||
1993d683 | 90 | static int ipoib_ib_post_receive(struct net_device *dev, int id) |
1da177e4 | 91 | { |
1993d683 RD |
92 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
93 | struct ib_sge list; | |
94 | struct ib_recv_wr param; | |
1da177e4 | 95 | struct ib_recv_wr *bad_wr; |
1993d683 RD |
96 | int ret; |
97 | ||
98 | list.addr = priv->rx_ring[id].mapping; | |
99 | list.length = IPOIB_BUF_SIZE; | |
100 | list.lkey = priv->mr->lkey; | |
101 | ||
102 | param.next = NULL; | |
103 | param.wr_id = id | IPOIB_OP_RECV; | |
104 | param.sg_list = &list; | |
105 | param.num_sge = 1; | |
106 | ||
107 | ret = ib_post_recv(priv->qp, ¶m, &bad_wr); | |
108 | if (unlikely(ret)) { | |
109 | ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret); | |
37ccf9df RC |
110 | ib_dma_unmap_single(priv->ca, priv->rx_ring[id].mapping, |
111 | IPOIB_BUF_SIZE, DMA_FROM_DEVICE); | |
1993d683 RD |
112 | dev_kfree_skb_any(priv->rx_ring[id].skb); |
113 | priv->rx_ring[id].skb = NULL; | |
114 | } | |
1da177e4 | 115 | |
1993d683 | 116 | return ret; |
1da177e4 LT |
117 | } |
118 | ||
1993d683 | 119 | static int ipoib_alloc_rx_skb(struct net_device *dev, int id) |
1da177e4 LT |
120 | { |
121 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
122 | struct sk_buff *skb; | |
37ccf9df | 123 | u64 addr; |
1da177e4 LT |
124 | |
125 | skb = dev_alloc_skb(IPOIB_BUF_SIZE + 4); | |
1993d683 | 126 | if (!skb) |
1da177e4 | 127 | return -ENOMEM; |
1993d683 RD |
128 | |
129 | /* | |
130 | * IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte | |
131 | * header. So we need 4 more bytes to get to 48 and align the | |
132 | * IP header to a multiple of 16. | |
133 | */ | |
134 | skb_reserve(skb, 4); | |
135 | ||
37ccf9df RC |
136 | addr = ib_dma_map_single(priv->ca, skb->data, IPOIB_BUF_SIZE, |
137 | DMA_FROM_DEVICE); | |
138 | if (unlikely(ib_dma_mapping_error(priv->ca, addr))) { | |
1da177e4 | 139 | dev_kfree_skb_any(skb); |
1993d683 | 140 | return -EIO; |
1da177e4 LT |
141 | } |
142 | ||
1993d683 RD |
143 | priv->rx_ring[id].skb = skb; |
144 | priv->rx_ring[id].mapping = addr; | |
145 | ||
146 | return 0; | |
1da177e4 LT |
147 | } |
148 | ||
149 | static int ipoib_ib_post_receives(struct net_device *dev) | |
150 | { | |
151 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
152 | int i; | |
153 | ||
0f485251 | 154 | for (i = 0; i < ipoib_recvq_size; ++i) { |
1993d683 RD |
155 | if (ipoib_alloc_rx_skb(dev, i)) { |
156 | ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); | |
157 | return -ENOMEM; | |
158 | } | |
1da177e4 LT |
159 | if (ipoib_ib_post_receive(dev, i)) { |
160 | ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i); | |
161 | return -EIO; | |
162 | } | |
163 | } | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
2439a6e6 | 168 | static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) |
1da177e4 LT |
169 | { |
170 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
2439a6e6 RD |
171 | unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV; |
172 | struct sk_buff *skb; | |
37ccf9df | 173 | u64 addr; |
1da177e4 | 174 | |
a89875fc RD |
175 | ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n", |
176 | wr_id, wc->status); | |
1da177e4 | 177 | |
2439a6e6 RD |
178 | if (unlikely(wr_id >= ipoib_recvq_size)) { |
179 | ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n", | |
180 | wr_id, ipoib_recvq_size); | |
181 | return; | |
182 | } | |
183 | ||
184 | skb = priv->rx_ring[wr_id].skb; | |
185 | addr = priv->rx_ring[wr_id].mapping; | |
186 | ||
187 | if (unlikely(wc->status != IB_WC_SUCCESS)) { | |
188 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
189 | ipoib_warn(priv, "failed recv event " | |
190 | "(status=%d, wrid=%d vend_err %x)\n", | |
191 | wc->status, wr_id, wc->vendor_err); | |
37ccf9df RC |
192 | ib_dma_unmap_single(priv->ca, addr, |
193 | IPOIB_BUF_SIZE, DMA_FROM_DEVICE); | |
2439a6e6 RD |
194 | dev_kfree_skb_any(skb); |
195 | priv->rx_ring[wr_id].skb = NULL; | |
196 | return; | |
197 | } | |
1da177e4 | 198 | |
1b844afe RD |
199 | /* |
200 | * Drop packets that this interface sent, ie multicast packets | |
201 | * that the HCA has replicated. | |
202 | */ | |
203 | if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num) | |
204 | goto repost; | |
205 | ||
2439a6e6 RD |
206 | /* |
207 | * If we can't allocate a new RX buffer, dump | |
208 | * this packet and reuse the old buffer. | |
209 | */ | |
210 | if (unlikely(ipoib_alloc_rx_skb(dev, wr_id))) { | |
de903512 | 211 | ++dev->stats.rx_dropped; |
2439a6e6 RD |
212 | goto repost; |
213 | } | |
214 | ||
215 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", | |
216 | wc->byte_len, wc->slid); | |
217 | ||
37ccf9df | 218 | ib_dma_unmap_single(priv->ca, addr, IPOIB_BUF_SIZE, DMA_FROM_DEVICE); |
2439a6e6 RD |
219 | |
220 | skb_put(skb, wc->byte_len); | |
221 | skb_pull(skb, IB_GRH_BYTES); | |
222 | ||
1b844afe RD |
223 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; |
224 | skb_reset_mac_header(skb); | |
225 | skb_pull(skb, IPOIB_ENCAP_LEN); | |
226 | ||
227 | dev->last_rx = jiffies; | |
de903512 RD |
228 | ++dev->stats.rx_packets; |
229 | dev->stats.rx_bytes += skb->len; | |
1b844afe RD |
230 | |
231 | skb->dev = dev; | |
232 | /* XXX get correct PACKET_ type here */ | |
233 | skb->pkt_type = PACKET_HOST; | |
234 | netif_receive_skb(skb); | |
1da177e4 | 235 | |
2439a6e6 RD |
236 | repost: |
237 | if (unlikely(ipoib_ib_post_receive(dev, wr_id))) | |
238 | ipoib_warn(priv, "ipoib_ib_post_receive failed " | |
239 | "for buf %d\n", wr_id); | |
240 | } | |
1da177e4 | 241 | |
2439a6e6 RD |
242 | static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc) |
243 | { | |
244 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
245 | unsigned int wr_id = wc->wr_id; | |
246 | struct ipoib_tx_buf *tx_req; | |
247 | unsigned long flags; | |
1da177e4 | 248 | |
a89875fc RD |
249 | ipoib_dbg_data(priv, "send completion: id %d, status: %d\n", |
250 | wr_id, wc->status); | |
1da177e4 | 251 | |
2439a6e6 RD |
252 | if (unlikely(wr_id >= ipoib_sendq_size)) { |
253 | ipoib_warn(priv, "send completion event with wrid %d (> %d)\n", | |
254 | wr_id, ipoib_sendq_size); | |
255 | return; | |
1da177e4 | 256 | } |
2439a6e6 RD |
257 | |
258 | tx_req = &priv->tx_ring[wr_id]; | |
259 | ||
37ccf9df RC |
260 | ib_dma_unmap_single(priv->ca, tx_req->mapping, |
261 | tx_req->skb->len, DMA_TO_DEVICE); | |
2439a6e6 | 262 | |
de903512 RD |
263 | ++dev->stats.tx_packets; |
264 | dev->stats.tx_bytes += tx_req->skb->len; | |
2439a6e6 RD |
265 | |
266 | dev_kfree_skb_any(tx_req->skb); | |
267 | ||
268 | spin_lock_irqsave(&priv->tx_lock, flags); | |
269 | ++priv->tx_tail; | |
1b524963 MT |
270 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
271 | netif_queue_stopped(dev) && | |
272 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
2439a6e6 RD |
273 | netif_wake_queue(dev); |
274 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
275 | ||
276 | if (wc->status != IB_WC_SUCCESS && | |
277 | wc->status != IB_WC_WR_FLUSH_ERR) | |
278 | ipoib_warn(priv, "failed send event " | |
279 | "(status=%d, wrid=%d vend_err %x)\n", | |
280 | wc->status, wr_id, wc->vendor_err); | |
281 | } | |
282 | ||
bea3348e | 283 | int ipoib_poll(struct napi_struct *napi, int budget) |
2439a6e6 | 284 | { |
bea3348e SH |
285 | struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi); |
286 | struct net_device *dev = priv->dev; | |
8d1cc86a RD |
287 | int done; |
288 | int t; | |
8d1cc86a RD |
289 | int n, i; |
290 | ||
291 | done = 0; | |
8d1cc86a | 292 | |
bea3348e SH |
293 | poll_more: |
294 | while (done < budget) { | |
295 | int max = (budget - done); | |
296 | ||
8d1cc86a RD |
297 | t = min(IPOIB_NUM_WC, max); |
298 | n = ib_poll_cq(priv->cq, t, priv->ibwc); | |
299 | ||
bea3348e | 300 | for (i = 0; i < n; i++) { |
8d1cc86a RD |
301 | struct ib_wc *wc = priv->ibwc + i; |
302 | ||
1b524963 | 303 | if (wc->wr_id & IPOIB_OP_RECV) { |
8d1cc86a | 304 | ++done; |
1b524963 MT |
305 | if (wc->wr_id & IPOIB_OP_CM) |
306 | ipoib_cm_handle_rx_wc(dev, wc); | |
307 | else | |
308 | ipoib_ib_handle_rx_wc(dev, wc); | |
309 | } else { | |
310 | if (wc->wr_id & IPOIB_OP_CM) | |
311 | ipoib_cm_handle_tx_wc(dev, wc); | |
312 | else | |
313 | ipoib_ib_handle_tx_wc(dev, wc); | |
314 | } | |
8d1cc86a RD |
315 | } |
316 | ||
bea3348e | 317 | if (n != t) |
8d1cc86a | 318 | break; |
8d1cc86a RD |
319 | } |
320 | ||
bea3348e SH |
321 | if (done < budget) { |
322 | netif_rx_complete(dev, napi); | |
8d1cc86a RD |
323 | if (unlikely(ib_req_notify_cq(priv->cq, |
324 | IB_CQ_NEXT_COMP | | |
325 | IB_CQ_REPORT_MISSED_EVENTS)) && | |
bea3348e SH |
326 | netif_rx_reschedule(dev, napi)) |
327 | goto poll_more; | |
8d1cc86a RD |
328 | } |
329 | ||
bea3348e | 330 | return done; |
1da177e4 LT |
331 | } |
332 | ||
333 | void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) | |
334 | { | |
bea3348e SH |
335 | struct net_device *dev = dev_ptr; |
336 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
337 | ||
338 | netif_rx_schedule(dev, &priv->napi); | |
1da177e4 LT |
339 | } |
340 | ||
341 | static inline int post_send(struct ipoib_dev_priv *priv, | |
342 | unsigned int wr_id, | |
343 | struct ib_ah *address, u32 qpn, | |
37ccf9df | 344 | u64 addr, int len) |
1da177e4 LT |
345 | { |
346 | struct ib_send_wr *bad_wr; | |
347 | ||
2337f809 RD |
348 | priv->tx_sge.addr = addr; |
349 | priv->tx_sge.length = len; | |
1da177e4 | 350 | |
2337f809 | 351 | priv->tx_wr.wr_id = wr_id; |
1da177e4 | 352 | priv->tx_wr.wr.ud.remote_qpn = qpn; |
2337f809 | 353 | priv->tx_wr.wr.ud.ah = address; |
1da177e4 LT |
354 | |
355 | return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr); | |
356 | } | |
357 | ||
358 | void ipoib_send(struct net_device *dev, struct sk_buff *skb, | |
359 | struct ipoib_ah *address, u32 qpn) | |
360 | { | |
361 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1993d683 | 362 | struct ipoib_tx_buf *tx_req; |
37ccf9df | 363 | u64 addr; |
1da177e4 | 364 | |
77d8e1ef | 365 | if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) { |
1da177e4 | 366 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", |
77d8e1ef | 367 | skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN); |
de903512 RD |
368 | ++dev->stats.tx_dropped; |
369 | ++dev->stats.tx_errors; | |
839fcaba | 370 | ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu); |
1da177e4 LT |
371 | return; |
372 | } | |
373 | ||
374 | ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n", | |
375 | skb->len, address, qpn); | |
376 | ||
377 | /* | |
378 | * We put the skb into the tx_ring _before_ we call post_send() | |
379 | * because it's entirely possible that the completion handler will | |
380 | * run before we execute anything after the post_send(). That | |
381 | * means we have to make sure everything is properly recorded and | |
382 | * our state is consistent before we call post_send(). | |
383 | */ | |
0f485251 | 384 | tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)]; |
1da177e4 | 385 | tx_req->skb = skb; |
37ccf9df RC |
386 | addr = ib_dma_map_single(priv->ca, skb->data, skb->len, |
387 | DMA_TO_DEVICE); | |
388 | if (unlikely(ib_dma_mapping_error(priv->ca, addr))) { | |
de903512 | 389 | ++dev->stats.tx_errors; |
73fbe8be RD |
390 | dev_kfree_skb_any(skb); |
391 | return; | |
392 | } | |
37ccf9df | 393 | tx_req->mapping = addr; |
1da177e4 | 394 | |
0f485251 | 395 | if (unlikely(post_send(priv, priv->tx_head & (ipoib_sendq_size - 1), |
1da177e4 LT |
396 | address->ah, qpn, addr, skb->len))) { |
397 | ipoib_warn(priv, "post_send failed\n"); | |
de903512 | 398 | ++dev->stats.tx_errors; |
37ccf9df | 399 | ib_dma_unmap_single(priv->ca, addr, skb->len, DMA_TO_DEVICE); |
1da177e4 LT |
400 | dev_kfree_skb_any(skb); |
401 | } else { | |
402 | dev->trans_start = jiffies; | |
403 | ||
404 | address->last_send = priv->tx_head; | |
405 | ++priv->tx_head; | |
406 | ||
1b524963 | 407 | if (++priv->tx_outstanding == ipoib_sendq_size) { |
1da177e4 LT |
408 | ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); |
409 | netif_stop_queue(dev); | |
410 | } | |
411 | } | |
412 | } | |
413 | ||
414 | static void __ipoib_reap_ah(struct net_device *dev) | |
415 | { | |
416 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
417 | struct ipoib_ah *ah, *tah; | |
418 | LIST_HEAD(remove_list); | |
419 | ||
31c02e21 RD |
420 | spin_lock_irq(&priv->tx_lock); |
421 | spin_lock(&priv->lock); | |
1da177e4 | 422 | list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) |
2181858b | 423 | if ((int) priv->tx_tail - (int) ah->last_send >= 0) { |
1da177e4 | 424 | list_del(&ah->list); |
31c02e21 RD |
425 | ib_destroy_ah(ah->ah); |
426 | kfree(ah); | |
1da177e4 | 427 | } |
31c02e21 RD |
428 | spin_unlock(&priv->lock); |
429 | spin_unlock_irq(&priv->tx_lock); | |
1da177e4 LT |
430 | } |
431 | ||
c4028958 | 432 | void ipoib_reap_ah(struct work_struct *work) |
1da177e4 | 433 | { |
c4028958 DH |
434 | struct ipoib_dev_priv *priv = |
435 | container_of(work, struct ipoib_dev_priv, ah_reap_task.work); | |
436 | struct net_device *dev = priv->dev; | |
1da177e4 LT |
437 | |
438 | __ipoib_reap_ah(dev); | |
439 | ||
440 | if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) | |
69fc507a AB |
441 | queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, |
442 | round_jiffies_relative(HZ)); | |
1da177e4 LT |
443 | } |
444 | ||
445 | int ipoib_ib_dev_open(struct net_device *dev) | |
446 | { | |
447 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
448 | int ret; | |
449 | ||
26bbf13c YE |
450 | if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) { |
451 | ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey); | |
452 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
453 | return -1; | |
454 | } | |
455 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
456 | ||
5b6810e0 | 457 | ret = ipoib_init_qp(dev); |
1da177e4 | 458 | if (ret) { |
5b6810e0 | 459 | ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); |
1da177e4 LT |
460 | return -1; |
461 | } | |
462 | ||
463 | ret = ipoib_ib_post_receives(dev); | |
464 | if (ret) { | |
465 | ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); | |
26bbf13c | 466 | ipoib_ib_dev_stop(dev, 1); |
1da177e4 LT |
467 | return -1; |
468 | } | |
469 | ||
839fcaba MT |
470 | ret = ipoib_cm_dev_open(dev); |
471 | if (ret) { | |
24bd1e4e | 472 | ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret); |
26bbf13c | 473 | ipoib_ib_dev_stop(dev, 1); |
839fcaba MT |
474 | return -1; |
475 | } | |
476 | ||
1da177e4 | 477 | clear_bit(IPOIB_STOP_REAPER, &priv->flags); |
69fc507a AB |
478 | queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, |
479 | round_jiffies_relative(HZ)); | |
1da177e4 | 480 | |
7a343d4c LA |
481 | set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
482 | ||
1da177e4 LT |
483 | return 0; |
484 | } | |
485 | ||
7a343d4c LA |
486 | static void ipoib_pkey_dev_check_presence(struct net_device *dev) |
487 | { | |
488 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
489 | u16 pkey_index = 0; | |
490 | ||
491 | if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) | |
492 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
493 | else | |
494 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
495 | } | |
496 | ||
1da177e4 LT |
497 | int ipoib_ib_dev_up(struct net_device *dev) |
498 | { | |
499 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
500 | ||
7a343d4c LA |
501 | ipoib_pkey_dev_check_presence(dev); |
502 | ||
503 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
504 | ipoib_dbg(priv, "PKEY is not assigned.\n"); | |
505 | return 0; | |
506 | } | |
507 | ||
1da177e4 LT |
508 | set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); |
509 | ||
510 | return ipoib_mcast_start_thread(dev); | |
511 | } | |
512 | ||
0b3ea082 | 513 | int ipoib_ib_dev_down(struct net_device *dev, int flush) |
1da177e4 LT |
514 | { |
515 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
516 | ||
517 | ipoib_dbg(priv, "downing ib_dev\n"); | |
518 | ||
519 | clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
520 | netif_carrier_off(dev); | |
521 | ||
522 | /* Shutdown the P_Key thread if still active */ | |
523 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
95ed644f | 524 | mutex_lock(&pkey_mutex); |
1da177e4 | 525 | set_bit(IPOIB_PKEY_STOP, &priv->flags); |
26bbf13c | 526 | cancel_delayed_work(&priv->pkey_poll_task); |
95ed644f | 527 | mutex_unlock(&pkey_mutex); |
0b3ea082 JM |
528 | if (flush) |
529 | flush_workqueue(ipoib_workqueue); | |
1da177e4 LT |
530 | } |
531 | ||
0b3ea082 | 532 | ipoib_mcast_stop_thread(dev, flush); |
1da177e4 LT |
533 | ipoib_mcast_dev_flush(dev); |
534 | ||
1da177e4 LT |
535 | ipoib_flush_paths(dev); |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
540 | static int recvs_pending(struct net_device *dev) | |
541 | { | |
542 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
543 | int pending = 0; | |
544 | int i; | |
545 | ||
0f485251 | 546 | for (i = 0; i < ipoib_recvq_size; ++i) |
1da177e4 LT |
547 | if (priv->rx_ring[i].skb) |
548 | ++pending; | |
549 | ||
550 | return pending; | |
551 | } | |
552 | ||
2dfbfc37 MT |
553 | void ipoib_drain_cq(struct net_device *dev) |
554 | { | |
555 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
556 | int i, n; | |
557 | do { | |
558 | n = ib_poll_cq(priv->cq, IPOIB_NUM_WC, priv->ibwc); | |
559 | for (i = 0; i < n; ++i) { | |
ce423ef5 RD |
560 | /* |
561 | * Convert any successful completions to flush | |
562 | * errors to avoid passing packets up the | |
563 | * stack after bringing the device down. | |
564 | */ | |
565 | if (priv->ibwc[i].status == IB_WC_SUCCESS) | |
566 | priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; | |
567 | ||
1b524963 MT |
568 | if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) { |
569 | if (priv->ibwc[i].wr_id & IPOIB_OP_CM) | |
570 | ipoib_cm_handle_rx_wc(dev, priv->ibwc + i); | |
571 | else | |
572 | ipoib_ib_handle_rx_wc(dev, priv->ibwc + i); | |
573 | } else { | |
574 | if (priv->ibwc[i].wr_id & IPOIB_OP_CM) | |
575 | ipoib_cm_handle_tx_wc(dev, priv->ibwc + i); | |
576 | else | |
577 | ipoib_ib_handle_tx_wc(dev, priv->ibwc + i); | |
578 | } | |
2dfbfc37 MT |
579 | } |
580 | } while (n == IPOIB_NUM_WC); | |
581 | } | |
582 | ||
26bbf13c | 583 | int ipoib_ib_dev_stop(struct net_device *dev, int flush) |
1da177e4 LT |
584 | { |
585 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
586 | struct ib_qp_attr qp_attr; | |
1da177e4 | 587 | unsigned long begin; |
1993d683 | 588 | struct ipoib_tx_buf *tx_req; |
2dfbfc37 | 589 | int i; |
1da177e4 | 590 | |
7a343d4c LA |
591 | clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
592 | ||
839fcaba MT |
593 | ipoib_cm_dev_stop(dev); |
594 | ||
3bc12e75 RD |
595 | /* |
596 | * Move our QP to the error state and then reinitialize in | |
597 | * when all work requests have completed or have been flushed. | |
598 | */ | |
1da177e4 | 599 | qp_attr.qp_state = IB_QPS_ERR; |
3bc12e75 | 600 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
1da177e4 LT |
601 | ipoib_warn(priv, "Failed to modify QP to ERROR state\n"); |
602 | ||
603 | /* Wait for all sends and receives to complete */ | |
604 | begin = jiffies; | |
605 | ||
606 | while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) { | |
607 | if (time_after(jiffies, begin + 5 * HZ)) { | |
608 | ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", | |
609 | priv->tx_head - priv->tx_tail, recvs_pending(dev)); | |
610 | ||
611 | /* | |
612 | * assume the HW is wedged and just free up | |
613 | * all our pending work requests. | |
614 | */ | |
2181858b | 615 | while ((int) priv->tx_tail - (int) priv->tx_head < 0) { |
1da177e4 | 616 | tx_req = &priv->tx_ring[priv->tx_tail & |
0f485251 | 617 | (ipoib_sendq_size - 1)]; |
37ccf9df RC |
618 | ib_dma_unmap_single(priv->ca, |
619 | tx_req->mapping, | |
620 | tx_req->skb->len, | |
621 | DMA_TO_DEVICE); | |
1da177e4 LT |
622 | dev_kfree_skb_any(tx_req->skb); |
623 | ++priv->tx_tail; | |
1b524963 | 624 | --priv->tx_outstanding; |
1da177e4 LT |
625 | } |
626 | ||
37ccf9df RC |
627 | for (i = 0; i < ipoib_recvq_size; ++i) { |
628 | struct ipoib_rx_buf *rx_req; | |
629 | ||
630 | rx_req = &priv->rx_ring[i]; | |
631 | if (!rx_req->skb) | |
632 | continue; | |
633 | ib_dma_unmap_single(priv->ca, | |
634 | rx_req->mapping, | |
635 | IPOIB_BUF_SIZE, | |
636 | DMA_FROM_DEVICE); | |
637 | dev_kfree_skb_any(rx_req->skb); | |
638 | rx_req->skb = NULL; | |
639 | } | |
1da177e4 LT |
640 | |
641 | goto timeout; | |
642 | } | |
643 | ||
2dfbfc37 | 644 | ipoib_drain_cq(dev); |
8d1cc86a | 645 | |
1da177e4 LT |
646 | msleep(1); |
647 | } | |
648 | ||
649 | ipoib_dbg(priv, "All sends and receives done.\n"); | |
650 | ||
651 | timeout: | |
652 | qp_attr.qp_state = IB_QPS_RESET; | |
3bc12e75 | 653 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
1da177e4 LT |
654 | ipoib_warn(priv, "Failed to modify QP to RESET state\n"); |
655 | ||
656 | /* Wait for all AHs to be reaped */ | |
657 | set_bit(IPOIB_STOP_REAPER, &priv->flags); | |
658 | cancel_delayed_work(&priv->ah_reap_task); | |
26bbf13c YE |
659 | if (flush) |
660 | flush_workqueue(ipoib_workqueue); | |
1da177e4 LT |
661 | |
662 | begin = jiffies; | |
663 | ||
664 | while (!list_empty(&priv->dead_ahs)) { | |
665 | __ipoib_reap_ah(dev); | |
666 | ||
667 | if (time_after(jiffies, begin + HZ)) { | |
668 | ipoib_warn(priv, "timing out; will leak address handles\n"); | |
669 | break; | |
670 | } | |
671 | ||
672 | msleep(1); | |
673 | } | |
674 | ||
8d1cc86a RD |
675 | ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP); |
676 | ||
1da177e4 LT |
677 | return 0; |
678 | } | |
679 | ||
680 | int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
681 | { | |
682 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
683 | ||
684 | priv->ca = ca; | |
685 | priv->port = port; | |
686 | priv->qp = NULL; | |
687 | ||
688 | if (ipoib_transport_dev_init(dev, ca)) { | |
689 | printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); | |
690 | return -ENODEV; | |
691 | } | |
692 | ||
693 | if (dev->flags & IFF_UP) { | |
694 | if (ipoib_ib_dev_open(dev)) { | |
695 | ipoib_transport_dev_cleanup(dev); | |
696 | return -ENODEV; | |
697 | } | |
698 | } | |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
26bbf13c | 703 | static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, int pkey_event) |
1da177e4 | 704 | { |
26bbf13c | 705 | struct ipoib_dev_priv *cpriv; |
c4028958 | 706 | struct net_device *dev = priv->dev; |
26bbf13c YE |
707 | u16 new_index; |
708 | ||
709 | mutex_lock(&priv->vlan_mutex); | |
1da177e4 | 710 | |
26bbf13c YE |
711 | /* |
712 | * Flush any child interfaces too -- they might be up even if | |
713 | * the parent is down. | |
714 | */ | |
715 | list_for_each_entry(cpriv, &priv->child_intfs, list) | |
716 | __ipoib_ib_dev_flush(cpriv, pkey_event); | |
717 | ||
718 | mutex_unlock(&priv->vlan_mutex); | |
719 | ||
720 | if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) { | |
7a343d4c LA |
721 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); |
722 | return; | |
723 | } | |
724 | ||
725 | if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { | |
726 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); | |
1da177e4 | 727 | return; |
7a343d4c | 728 | } |
1da177e4 | 729 | |
26bbf13c YE |
730 | if (pkey_event) { |
731 | if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) { | |
732 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
733 | ipoib_ib_dev_down(dev, 0); | |
734 | ipoib_pkey_dev_delay_open(dev); | |
735 | return; | |
736 | } | |
737 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
738 | ||
739 | /* restart QP only if P_Key index is changed */ | |
740 | if (new_index == priv->pkey_index) { | |
741 | ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); | |
742 | return; | |
743 | } | |
744 | priv->pkey_index = new_index; | |
745 | } | |
746 | ||
1da177e4 LT |
747 | ipoib_dbg(priv, "flushing\n"); |
748 | ||
0b3ea082 | 749 | ipoib_ib_dev_down(dev, 0); |
1da177e4 | 750 | |
26bbf13c YE |
751 | if (pkey_event) { |
752 | ipoib_ib_dev_stop(dev, 0); | |
753 | ipoib_ib_dev_open(dev); | |
754 | } | |
755 | ||
1da177e4 LT |
756 | /* |
757 | * The device could have been brought down between the start and when | |
758 | * we get here, don't bring it back up if it's not configured up | |
759 | */ | |
5ccd0255 | 760 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { |
1da177e4 | 761 | ipoib_ib_dev_up(dev); |
c4028958 | 762 | ipoib_mcast_restart_task(&priv->restart_task); |
5ccd0255 | 763 | } |
26bbf13c | 764 | } |
1da177e4 | 765 | |
26bbf13c YE |
766 | void ipoib_ib_dev_flush(struct work_struct *work) |
767 | { | |
768 | struct ipoib_dev_priv *priv = | |
769 | container_of(work, struct ipoib_dev_priv, flush_task); | |
4f71055a | 770 | |
26bbf13c YE |
771 | ipoib_dbg(priv, "Flushing %s\n", priv->dev->name); |
772 | __ipoib_ib_dev_flush(priv, 0); | |
773 | } | |
4f71055a | 774 | |
26bbf13c YE |
775 | void ipoib_pkey_event(struct work_struct *work) |
776 | { | |
777 | struct ipoib_dev_priv *priv = | |
778 | container_of(work, struct ipoib_dev_priv, pkey_event_task); | |
779 | ||
780 | ipoib_dbg(priv, "Flushing %s and restarting its QP\n", priv->dev->name); | |
781 | __ipoib_ib_dev_flush(priv, 1); | |
1da177e4 LT |
782 | } |
783 | ||
784 | void ipoib_ib_dev_cleanup(struct net_device *dev) | |
785 | { | |
786 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
787 | ||
788 | ipoib_dbg(priv, "cleaning up ib_dev\n"); | |
789 | ||
8d2cae06 | 790 | ipoib_mcast_stop_thread(dev, 1); |
988bd503 | 791 | ipoib_mcast_dev_flush(dev); |
1da177e4 LT |
792 | |
793 | ipoib_transport_dev_cleanup(dev); | |
794 | } | |
795 | ||
796 | /* | |
797 | * Delayed P_Key Assigment Interim Support | |
798 | * | |
799 | * The following is initial implementation of delayed P_Key assigment | |
800 | * mechanism. It is using the same approach implemented for the multicast | |
801 | * group join. The single goal of this implementation is to quickly address | |
802 | * Bug #2507. This implementation will probably be removed when the P_Key | |
803 | * change async notification is available. | |
804 | */ | |
1da177e4 | 805 | |
c4028958 | 806 | void ipoib_pkey_poll(struct work_struct *work) |
1da177e4 | 807 | { |
c4028958 | 808 | struct ipoib_dev_priv *priv = |
26bbf13c | 809 | container_of(work, struct ipoib_dev_priv, pkey_poll_task.work); |
c4028958 | 810 | struct net_device *dev = priv->dev; |
1da177e4 LT |
811 | |
812 | ipoib_pkey_dev_check_presence(dev); | |
813 | ||
814 | if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) | |
815 | ipoib_open(dev); | |
816 | else { | |
95ed644f | 817 | mutex_lock(&pkey_mutex); |
1da177e4 LT |
818 | if (!test_bit(IPOIB_PKEY_STOP, &priv->flags)) |
819 | queue_delayed_work(ipoib_workqueue, | |
26bbf13c | 820 | &priv->pkey_poll_task, |
1da177e4 | 821 | HZ); |
95ed644f | 822 | mutex_unlock(&pkey_mutex); |
1da177e4 LT |
823 | } |
824 | } | |
825 | ||
826 | int ipoib_pkey_dev_delay_open(struct net_device *dev) | |
827 | { | |
828 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
829 | ||
830 | /* Look for the interface pkey value in the IB Port P_Key table and */ | |
831 | /* set the interface pkey assigment flag */ | |
832 | ipoib_pkey_dev_check_presence(dev); | |
833 | ||
834 | /* P_Key value not assigned yet - start polling */ | |
835 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
95ed644f | 836 | mutex_lock(&pkey_mutex); |
1da177e4 LT |
837 | clear_bit(IPOIB_PKEY_STOP, &priv->flags); |
838 | queue_delayed_work(ipoib_workqueue, | |
26bbf13c | 839 | &priv->pkey_poll_task, |
1da177e4 | 840 | HZ); |
95ed644f | 841 | mutex_unlock(&pkey_mutex); |
1da177e4 LT |
842 | return 1; |
843 | } | |
844 | ||
845 | return 0; | |
846 | } |