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 | ||
53 | #define IPOIB_OP_RECV (1ul << 31) | |
54 | ||
95ed644f | 55 | static DEFINE_MUTEX(pkey_mutex); |
1da177e4 LT |
56 | |
57 | struct ipoib_ah *ipoib_create_ah(struct net_device *dev, | |
58 | struct ib_pd *pd, struct ib_ah_attr *attr) | |
59 | { | |
60 | struct ipoib_ah *ah; | |
61 | ||
62 | ah = kmalloc(sizeof *ah, GFP_KERNEL); | |
63 | if (!ah) | |
64 | return NULL; | |
65 | ||
66 | ah->dev = dev; | |
67 | ah->last_send = 0; | |
68 | kref_init(&ah->ref); | |
69 | ||
70 | ah->ah = ib_create_ah(pd, attr); | |
71 | if (IS_ERR(ah->ah)) { | |
72 | kfree(ah); | |
73 | ah = NULL; | |
74 | } else | |
75 | ipoib_dbg(netdev_priv(dev), "Created ah %p\n", ah->ah); | |
76 | ||
77 | return ah; | |
78 | } | |
79 | ||
80 | void ipoib_free_ah(struct kref *kref) | |
81 | { | |
82 | struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref); | |
83 | struct ipoib_dev_priv *priv = netdev_priv(ah->dev); | |
84 | ||
85 | unsigned long flags; | |
86 | ||
2181858b | 87 | if ((int) priv->tx_tail - (int) ah->last_send >= 0) { |
1da177e4 LT |
88 | ipoib_dbg(priv, "Freeing ah %p\n", ah->ah); |
89 | ib_destroy_ah(ah->ah); | |
90 | kfree(ah); | |
91 | } else { | |
92 | spin_lock_irqsave(&priv->lock, flags); | |
93 | list_add_tail(&ah->list, &priv->dead_ahs); | |
94 | spin_unlock_irqrestore(&priv->lock, flags); | |
95 | } | |
96 | } | |
97 | ||
1993d683 | 98 | static int ipoib_ib_post_receive(struct net_device *dev, int id) |
1da177e4 | 99 | { |
1993d683 RD |
100 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
101 | struct ib_sge list; | |
102 | struct ib_recv_wr param; | |
1da177e4 | 103 | struct ib_recv_wr *bad_wr; |
1993d683 RD |
104 | int ret; |
105 | ||
106 | list.addr = priv->rx_ring[id].mapping; | |
107 | list.length = IPOIB_BUF_SIZE; | |
108 | list.lkey = priv->mr->lkey; | |
109 | ||
110 | param.next = NULL; | |
111 | param.wr_id = id | IPOIB_OP_RECV; | |
112 | param.sg_list = &list; | |
113 | param.num_sge = 1; | |
114 | ||
115 | ret = ib_post_recv(priv->qp, ¶m, &bad_wr); | |
116 | if (unlikely(ret)) { | |
117 | ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret); | |
118 | dma_unmap_single(priv->ca->dma_device, | |
119 | priv->rx_ring[id].mapping, | |
120 | IPOIB_BUF_SIZE, DMA_FROM_DEVICE); | |
121 | dev_kfree_skb_any(priv->rx_ring[id].skb); | |
122 | priv->rx_ring[id].skb = NULL; | |
123 | } | |
1da177e4 | 124 | |
1993d683 | 125 | return ret; |
1da177e4 LT |
126 | } |
127 | ||
1993d683 | 128 | static int ipoib_alloc_rx_skb(struct net_device *dev, int id) |
1da177e4 LT |
129 | { |
130 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
131 | struct sk_buff *skb; | |
132 | dma_addr_t addr; | |
1da177e4 LT |
133 | |
134 | skb = dev_alloc_skb(IPOIB_BUF_SIZE + 4); | |
1993d683 | 135 | if (!skb) |
1da177e4 | 136 | return -ENOMEM; |
1993d683 RD |
137 | |
138 | /* | |
139 | * IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte | |
140 | * header. So we need 4 more bytes to get to 48 and align the | |
141 | * IP header to a multiple of 16. | |
142 | */ | |
143 | skb_reserve(skb, 4); | |
144 | ||
1da177e4 LT |
145 | addr = dma_map_single(priv->ca->dma_device, |
146 | skb->data, IPOIB_BUF_SIZE, | |
147 | DMA_FROM_DEVICE); | |
1993d683 | 148 | if (unlikely(dma_mapping_error(addr))) { |
1da177e4 | 149 | dev_kfree_skb_any(skb); |
1993d683 | 150 | return -EIO; |
1da177e4 LT |
151 | } |
152 | ||
1993d683 RD |
153 | priv->rx_ring[id].skb = skb; |
154 | priv->rx_ring[id].mapping = addr; | |
155 | ||
156 | return 0; | |
1da177e4 LT |
157 | } |
158 | ||
159 | static int ipoib_ib_post_receives(struct net_device *dev) | |
160 | { | |
161 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
162 | int i; | |
163 | ||
164 | for (i = 0; i < IPOIB_RX_RING_SIZE; ++i) { | |
1993d683 RD |
165 | if (ipoib_alloc_rx_skb(dev, i)) { |
166 | ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); | |
167 | return -ENOMEM; | |
168 | } | |
1da177e4 LT |
169 | if (ipoib_ib_post_receive(dev, i)) { |
170 | ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i); | |
171 | return -EIO; | |
172 | } | |
173 | } | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
178 | static void ipoib_ib_handle_wc(struct net_device *dev, | |
179 | struct ib_wc *wc) | |
180 | { | |
181 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
182 | unsigned int wr_id = wc->wr_id; | |
183 | ||
184 | ipoib_dbg_data(priv, "called: id %d, op %d, status: %d\n", | |
185 | wr_id, wc->opcode, wc->status); | |
186 | ||
187 | if (wr_id & IPOIB_OP_RECV) { | |
188 | wr_id &= ~IPOIB_OP_RECV; | |
189 | ||
190 | if (wr_id < IPOIB_RX_RING_SIZE) { | |
1993d683 RD |
191 | struct sk_buff *skb = priv->rx_ring[wr_id].skb; |
192 | dma_addr_t addr = priv->rx_ring[wr_id].mapping; | |
1da177e4 | 193 | |
1993d683 | 194 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1da177e4 LT |
195 | if (wc->status != IB_WC_WR_FLUSH_ERR) |
196 | ipoib_warn(priv, "failed recv event " | |
197 | "(status=%d, wrid=%d vend_err %x)\n", | |
198 | wc->status, wr_id, wc->vendor_err); | |
1993d683 RD |
199 | dma_unmap_single(priv->ca->dma_device, addr, |
200 | IPOIB_BUF_SIZE, DMA_FROM_DEVICE); | |
1da177e4 | 201 | dev_kfree_skb_any(skb); |
1993d683 | 202 | priv->rx_ring[wr_id].skb = NULL; |
1da177e4 LT |
203 | return; |
204 | } | |
205 | ||
1993d683 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))) { | |
211 | ++priv->stats.rx_dropped; | |
212 | goto repost; | |
213 | } | |
214 | ||
1da177e4 LT |
215 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", |
216 | wc->byte_len, wc->slid); | |
217 | ||
1993d683 RD |
218 | dma_unmap_single(priv->ca->dma_device, addr, |
219 | IPOIB_BUF_SIZE, DMA_FROM_DEVICE); | |
220 | ||
1da177e4 LT |
221 | skb_put(skb, wc->byte_len); |
222 | skb_pull(skb, IB_GRH_BYTES); | |
223 | ||
224 | if (wc->slid != priv->local_lid || | |
225 | wc->src_qp != priv->qp->qp_num) { | |
226 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; | |
62241eb4 | 227 | skb->mac.raw = skb->data; |
1da177e4 LT |
228 | skb_pull(skb, IPOIB_ENCAP_LEN); |
229 | ||
230 | dev->last_rx = jiffies; | |
231 | ++priv->stats.rx_packets; | |
232 | priv->stats.rx_bytes += skb->len; | |
233 | ||
234 | skb->dev = dev; | |
235 | /* XXX get correct PACKET_ type here */ | |
236 | skb->pkt_type = PACKET_HOST; | |
237 | netif_rx_ni(skb); | |
238 | } else { | |
239 | ipoib_dbg_data(priv, "dropping loopback packet\n"); | |
240 | dev_kfree_skb_any(skb); | |
241 | } | |
242 | ||
1993d683 RD |
243 | repost: |
244 | if (unlikely(ipoib_ib_post_receive(dev, wr_id))) | |
1da177e4 LT |
245 | ipoib_warn(priv, "ipoib_ib_post_receive failed " |
246 | "for buf %d\n", wr_id); | |
247 | } else | |
248 | ipoib_warn(priv, "completion event with wrid %d\n", | |
249 | wr_id); | |
250 | ||
251 | } else { | |
1993d683 | 252 | struct ipoib_tx_buf *tx_req; |
1da177e4 LT |
253 | unsigned long flags; |
254 | ||
255 | if (wr_id >= IPOIB_TX_RING_SIZE) { | |
256 | ipoib_warn(priv, "completion event with wrid %d (> %d)\n", | |
257 | wr_id, IPOIB_TX_RING_SIZE); | |
258 | return; | |
259 | } | |
260 | ||
261 | ipoib_dbg_data(priv, "send complete, wrid %d\n", wr_id); | |
262 | ||
263 | tx_req = &priv->tx_ring[wr_id]; | |
264 | ||
265 | dma_unmap_single(priv->ca->dma_device, | |
266 | pci_unmap_addr(tx_req, mapping), | |
267 | tx_req->skb->len, | |
268 | DMA_TO_DEVICE); | |
269 | ||
270 | ++priv->stats.tx_packets; | |
271 | priv->stats.tx_bytes += tx_req->skb->len; | |
272 | ||
273 | dev_kfree_skb_any(tx_req->skb); | |
274 | ||
275 | spin_lock_irqsave(&priv->tx_lock, flags); | |
276 | ++priv->tx_tail; | |
277 | if (netif_queue_stopped(dev) && | |
278 | priv->tx_head - priv->tx_tail <= IPOIB_TX_RING_SIZE / 2) | |
279 | netif_wake_queue(dev); | |
280 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
281 | ||
282 | if (wc->status != IB_WC_SUCCESS && | |
283 | wc->status != IB_WC_WR_FLUSH_ERR) | |
284 | ipoib_warn(priv, "failed send event " | |
285 | "(status=%d, wrid=%d vend_err %x)\n", | |
286 | wc->status, wr_id, wc->vendor_err); | |
287 | } | |
288 | } | |
289 | ||
290 | void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) | |
291 | { | |
292 | struct net_device *dev = (struct net_device *) dev_ptr; | |
293 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
294 | int n, i; | |
295 | ||
296 | ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); | |
297 | do { | |
298 | n = ib_poll_cq(cq, IPOIB_NUM_WC, priv->ibwc); | |
299 | for (i = 0; i < n; ++i) | |
300 | ipoib_ib_handle_wc(dev, priv->ibwc + i); | |
301 | } while (n == IPOIB_NUM_WC); | |
302 | } | |
303 | ||
304 | static inline int post_send(struct ipoib_dev_priv *priv, | |
305 | unsigned int wr_id, | |
306 | struct ib_ah *address, u32 qpn, | |
307 | dma_addr_t addr, int len) | |
308 | { | |
309 | struct ib_send_wr *bad_wr; | |
310 | ||
311 | priv->tx_sge.addr = addr; | |
312 | priv->tx_sge.length = len; | |
313 | ||
314 | priv->tx_wr.wr_id = wr_id; | |
315 | priv->tx_wr.wr.ud.remote_qpn = qpn; | |
316 | priv->tx_wr.wr.ud.ah = address; | |
317 | ||
318 | return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr); | |
319 | } | |
320 | ||
321 | void ipoib_send(struct net_device *dev, struct sk_buff *skb, | |
322 | struct ipoib_ah *address, u32 qpn) | |
323 | { | |
324 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1993d683 | 325 | struct ipoib_tx_buf *tx_req; |
1da177e4 LT |
326 | dma_addr_t addr; |
327 | ||
328 | if (skb->len > dev->mtu + INFINIBAND_ALEN) { | |
329 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", | |
330 | skb->len, dev->mtu + INFINIBAND_ALEN); | |
331 | ++priv->stats.tx_dropped; | |
332 | ++priv->stats.tx_errors; | |
333 | dev_kfree_skb_any(skb); | |
334 | return; | |
335 | } | |
336 | ||
337 | ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n", | |
338 | skb->len, address, qpn); | |
339 | ||
340 | /* | |
341 | * We put the skb into the tx_ring _before_ we call post_send() | |
342 | * because it's entirely possible that the completion handler will | |
343 | * run before we execute anything after the post_send(). That | |
344 | * means we have to make sure everything is properly recorded and | |
345 | * our state is consistent before we call post_send(). | |
346 | */ | |
347 | tx_req = &priv->tx_ring[priv->tx_head & (IPOIB_TX_RING_SIZE - 1)]; | |
348 | tx_req->skb = skb; | |
349 | addr = dma_map_single(priv->ca->dma_device, skb->data, skb->len, | |
350 | DMA_TO_DEVICE); | |
351 | pci_unmap_addr_set(tx_req, mapping, addr); | |
352 | ||
353 | if (unlikely(post_send(priv, priv->tx_head & (IPOIB_TX_RING_SIZE - 1), | |
354 | address->ah, qpn, addr, skb->len))) { | |
355 | ipoib_warn(priv, "post_send failed\n"); | |
356 | ++priv->stats.tx_errors; | |
357 | dma_unmap_single(priv->ca->dma_device, addr, skb->len, | |
358 | DMA_TO_DEVICE); | |
359 | dev_kfree_skb_any(skb); | |
360 | } else { | |
361 | dev->trans_start = jiffies; | |
362 | ||
363 | address->last_send = priv->tx_head; | |
364 | ++priv->tx_head; | |
365 | ||
366 | if (priv->tx_head - priv->tx_tail == IPOIB_TX_RING_SIZE) { | |
367 | ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); | |
368 | netif_stop_queue(dev); | |
369 | } | |
370 | } | |
371 | } | |
372 | ||
373 | static void __ipoib_reap_ah(struct net_device *dev) | |
374 | { | |
375 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
376 | struct ipoib_ah *ah, *tah; | |
377 | LIST_HEAD(remove_list); | |
378 | ||
379 | spin_lock_irq(&priv->lock); | |
380 | list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) | |
2181858b | 381 | if ((int) priv->tx_tail - (int) ah->last_send >= 0) { |
1da177e4 LT |
382 | list_del(&ah->list); |
383 | list_add_tail(&ah->list, &remove_list); | |
384 | } | |
385 | spin_unlock_irq(&priv->lock); | |
386 | ||
387 | list_for_each_entry_safe(ah, tah, &remove_list, list) { | |
388 | ipoib_dbg(priv, "Reaping ah %p\n", ah->ah); | |
389 | ib_destroy_ah(ah->ah); | |
390 | kfree(ah); | |
391 | } | |
392 | } | |
393 | ||
394 | void ipoib_reap_ah(void *dev_ptr) | |
395 | { | |
396 | struct net_device *dev = dev_ptr; | |
397 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
398 | ||
399 | __ipoib_reap_ah(dev); | |
400 | ||
401 | if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) | |
402 | queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ); | |
403 | } | |
404 | ||
405 | int ipoib_ib_dev_open(struct net_device *dev) | |
406 | { | |
407 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
408 | int ret; | |
409 | ||
5b6810e0 | 410 | ret = ipoib_init_qp(dev); |
1da177e4 | 411 | if (ret) { |
5b6810e0 | 412 | ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); |
1da177e4 LT |
413 | return -1; |
414 | } | |
415 | ||
416 | ret = ipoib_ib_post_receives(dev); | |
417 | if (ret) { | |
418 | ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); | |
54d07e2a | 419 | ipoib_ib_dev_stop(dev); |
1da177e4 LT |
420 | return -1; |
421 | } | |
422 | ||
423 | clear_bit(IPOIB_STOP_REAPER, &priv->flags); | |
424 | queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ); | |
425 | ||
7a343d4c LA |
426 | set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
427 | ||
1da177e4 LT |
428 | return 0; |
429 | } | |
430 | ||
7a343d4c LA |
431 | static void ipoib_pkey_dev_check_presence(struct net_device *dev) |
432 | { | |
433 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
434 | u16 pkey_index = 0; | |
435 | ||
436 | if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) | |
437 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
438 | else | |
439 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
440 | } | |
441 | ||
1da177e4 LT |
442 | int ipoib_ib_dev_up(struct net_device *dev) |
443 | { | |
444 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
445 | ||
7a343d4c LA |
446 | ipoib_pkey_dev_check_presence(dev); |
447 | ||
448 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
449 | ipoib_dbg(priv, "PKEY is not assigned.\n"); | |
450 | return 0; | |
451 | } | |
452 | ||
1da177e4 LT |
453 | set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); |
454 | ||
455 | return ipoib_mcast_start_thread(dev); | |
456 | } | |
457 | ||
0b3ea082 | 458 | int ipoib_ib_dev_down(struct net_device *dev, int flush) |
1da177e4 LT |
459 | { |
460 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
461 | ||
462 | ipoib_dbg(priv, "downing ib_dev\n"); | |
463 | ||
464 | clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
465 | netif_carrier_off(dev); | |
466 | ||
467 | /* Shutdown the P_Key thread if still active */ | |
468 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
95ed644f | 469 | mutex_lock(&pkey_mutex); |
1da177e4 LT |
470 | set_bit(IPOIB_PKEY_STOP, &priv->flags); |
471 | cancel_delayed_work(&priv->pkey_task); | |
95ed644f | 472 | mutex_unlock(&pkey_mutex); |
0b3ea082 JM |
473 | if (flush) |
474 | flush_workqueue(ipoib_workqueue); | |
1da177e4 LT |
475 | } |
476 | ||
0b3ea082 | 477 | ipoib_mcast_stop_thread(dev, flush); |
1da177e4 LT |
478 | ipoib_mcast_dev_flush(dev); |
479 | ||
1da177e4 LT |
480 | ipoib_flush_paths(dev); |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
485 | static int recvs_pending(struct net_device *dev) | |
486 | { | |
487 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
488 | int pending = 0; | |
489 | int i; | |
490 | ||
491 | for (i = 0; i < IPOIB_RX_RING_SIZE; ++i) | |
492 | if (priv->rx_ring[i].skb) | |
493 | ++pending; | |
494 | ||
495 | return pending; | |
496 | } | |
497 | ||
498 | int ipoib_ib_dev_stop(struct net_device *dev) | |
499 | { | |
500 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
501 | struct ib_qp_attr qp_attr; | |
1da177e4 | 502 | unsigned long begin; |
1993d683 | 503 | struct ipoib_tx_buf *tx_req; |
1da177e4 LT |
504 | int i; |
505 | ||
7a343d4c LA |
506 | clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
507 | ||
3bc12e75 RD |
508 | /* |
509 | * Move our QP to the error state and then reinitialize in | |
510 | * when all work requests have completed or have been flushed. | |
511 | */ | |
1da177e4 | 512 | qp_attr.qp_state = IB_QPS_ERR; |
3bc12e75 | 513 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
1da177e4 LT |
514 | ipoib_warn(priv, "Failed to modify QP to ERROR state\n"); |
515 | ||
516 | /* Wait for all sends and receives to complete */ | |
517 | begin = jiffies; | |
518 | ||
519 | while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) { | |
520 | if (time_after(jiffies, begin + 5 * HZ)) { | |
521 | ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", | |
522 | priv->tx_head - priv->tx_tail, recvs_pending(dev)); | |
523 | ||
524 | /* | |
525 | * assume the HW is wedged and just free up | |
526 | * all our pending work requests. | |
527 | */ | |
2181858b | 528 | while ((int) priv->tx_tail - (int) priv->tx_head < 0) { |
1da177e4 LT |
529 | tx_req = &priv->tx_ring[priv->tx_tail & |
530 | (IPOIB_TX_RING_SIZE - 1)]; | |
531 | dma_unmap_single(priv->ca->dma_device, | |
532 | pci_unmap_addr(tx_req, mapping), | |
533 | tx_req->skb->len, | |
534 | DMA_TO_DEVICE); | |
535 | dev_kfree_skb_any(tx_req->skb); | |
536 | ++priv->tx_tail; | |
537 | } | |
538 | ||
539 | for (i = 0; i < IPOIB_RX_RING_SIZE; ++i) | |
540 | if (priv->rx_ring[i].skb) { | |
541 | dma_unmap_single(priv->ca->dma_device, | |
542 | pci_unmap_addr(&priv->rx_ring[i], | |
543 | mapping), | |
544 | IPOIB_BUF_SIZE, | |
545 | DMA_FROM_DEVICE); | |
546 | dev_kfree_skb_any(priv->rx_ring[i].skb); | |
547 | priv->rx_ring[i].skb = NULL; | |
548 | } | |
549 | ||
550 | goto timeout; | |
551 | } | |
552 | ||
553 | msleep(1); | |
554 | } | |
555 | ||
556 | ipoib_dbg(priv, "All sends and receives done.\n"); | |
557 | ||
558 | timeout: | |
559 | qp_attr.qp_state = IB_QPS_RESET; | |
3bc12e75 | 560 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
1da177e4 LT |
561 | ipoib_warn(priv, "Failed to modify QP to RESET state\n"); |
562 | ||
563 | /* Wait for all AHs to be reaped */ | |
564 | set_bit(IPOIB_STOP_REAPER, &priv->flags); | |
565 | cancel_delayed_work(&priv->ah_reap_task); | |
566 | flush_workqueue(ipoib_workqueue); | |
567 | ||
568 | begin = jiffies; | |
569 | ||
570 | while (!list_empty(&priv->dead_ahs)) { | |
571 | __ipoib_reap_ah(dev); | |
572 | ||
573 | if (time_after(jiffies, begin + HZ)) { | |
574 | ipoib_warn(priv, "timing out; will leak address handles\n"); | |
575 | break; | |
576 | } | |
577 | ||
578 | msleep(1); | |
579 | } | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
584 | int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
585 | { | |
586 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
587 | ||
588 | priv->ca = ca; | |
589 | priv->port = port; | |
590 | priv->qp = NULL; | |
591 | ||
592 | if (ipoib_transport_dev_init(dev, ca)) { | |
593 | printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); | |
594 | return -ENODEV; | |
595 | } | |
596 | ||
597 | if (dev->flags & IFF_UP) { | |
598 | if (ipoib_ib_dev_open(dev)) { | |
599 | ipoib_transport_dev_cleanup(dev); | |
600 | return -ENODEV; | |
601 | } | |
602 | } | |
603 | ||
604 | return 0; | |
605 | } | |
606 | ||
607 | void ipoib_ib_dev_flush(void *_dev) | |
608 | { | |
609 | struct net_device *dev = (struct net_device *)_dev; | |
610 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv; | |
611 | ||
7a343d4c LA |
612 | if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) ) { |
613 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); | |
614 | return; | |
615 | } | |
616 | ||
617 | if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { | |
618 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); | |
1da177e4 | 619 | return; |
7a343d4c | 620 | } |
1da177e4 LT |
621 | |
622 | ipoib_dbg(priv, "flushing\n"); | |
623 | ||
0b3ea082 | 624 | ipoib_ib_dev_down(dev, 0); |
1da177e4 LT |
625 | |
626 | /* | |
627 | * The device could have been brought down between the start and when | |
628 | * we get here, don't bring it back up if it's not configured up | |
629 | */ | |
630 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
631 | ipoib_ib_dev_up(dev); | |
632 | ||
95ed644f | 633 | mutex_lock(&priv->vlan_mutex); |
4f71055a | 634 | |
1da177e4 LT |
635 | /* Flush any child interfaces too */ |
636 | list_for_each_entry(cpriv, &priv->child_intfs, list) | |
6f633c8d | 637 | ipoib_ib_dev_flush(cpriv->dev); |
4f71055a | 638 | |
95ed644f | 639 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
640 | } |
641 | ||
642 | void ipoib_ib_dev_cleanup(struct net_device *dev) | |
643 | { | |
644 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
645 | ||
646 | ipoib_dbg(priv, "cleaning up ib_dev\n"); | |
647 | ||
8d2cae06 | 648 | ipoib_mcast_stop_thread(dev, 1); |
988bd503 | 649 | ipoib_mcast_dev_flush(dev); |
1da177e4 LT |
650 | |
651 | ipoib_transport_dev_cleanup(dev); | |
652 | } | |
653 | ||
654 | /* | |
655 | * Delayed P_Key Assigment Interim Support | |
656 | * | |
657 | * The following is initial implementation of delayed P_Key assigment | |
658 | * mechanism. It is using the same approach implemented for the multicast | |
659 | * group join. The single goal of this implementation is to quickly address | |
660 | * Bug #2507. This implementation will probably be removed when the P_Key | |
661 | * change async notification is available. | |
662 | */ | |
1da177e4 | 663 | |
1da177e4 LT |
664 | void ipoib_pkey_poll(void *dev_ptr) |
665 | { | |
666 | struct net_device *dev = dev_ptr; | |
667 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
668 | ||
669 | ipoib_pkey_dev_check_presence(dev); | |
670 | ||
671 | if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) | |
672 | ipoib_open(dev); | |
673 | else { | |
95ed644f | 674 | mutex_lock(&pkey_mutex); |
1da177e4 LT |
675 | if (!test_bit(IPOIB_PKEY_STOP, &priv->flags)) |
676 | queue_delayed_work(ipoib_workqueue, | |
677 | &priv->pkey_task, | |
678 | HZ); | |
95ed644f | 679 | mutex_unlock(&pkey_mutex); |
1da177e4 LT |
680 | } |
681 | } | |
682 | ||
683 | int ipoib_pkey_dev_delay_open(struct net_device *dev) | |
684 | { | |
685 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
686 | ||
687 | /* Look for the interface pkey value in the IB Port P_Key table and */ | |
688 | /* set the interface pkey assigment flag */ | |
689 | ipoib_pkey_dev_check_presence(dev); | |
690 | ||
691 | /* P_Key value not assigned yet - start polling */ | |
692 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
95ed644f | 693 | mutex_lock(&pkey_mutex); |
1da177e4 LT |
694 | clear_bit(IPOIB_PKEY_STOP, &priv->flags); |
695 | queue_delayed_work(ipoib_workqueue, | |
696 | &priv->pkey_task, | |
697 | HZ); | |
95ed644f | 698 | mutex_unlock(&pkey_mutex); |
1da177e4 LT |
699 | return 1; |
700 | } | |
701 | ||
702 | return 0; | |
703 | } |