Commit | Line | Data |
---|---|---|
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 | |
2439a6e6 | 175 | ipoib_dbg_data(priv, "recv completion: id %d, op %d, status: %d\n", |
1da177e4 LT |
176 | wr_id, wc->opcode, wc->status); |
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 | |
2439a6e6 RD |
199 | /* |
200 | * If we can't allocate a new RX buffer, dump | |
201 | * this packet and reuse the old buffer. | |
202 | */ | |
203 | if (unlikely(ipoib_alloc_rx_skb(dev, wr_id))) { | |
204 | ++priv->stats.rx_dropped; | |
205 | goto repost; | |
206 | } | |
207 | ||
208 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", | |
209 | wc->byte_len, wc->slid); | |
210 | ||
37ccf9df | 211 | ib_dma_unmap_single(priv->ca, addr, IPOIB_BUF_SIZE, DMA_FROM_DEVICE); |
2439a6e6 RD |
212 | |
213 | skb_put(skb, wc->byte_len); | |
214 | skb_pull(skb, IB_GRH_BYTES); | |
215 | ||
216 | if (wc->slid != priv->local_lid || | |
217 | wc->src_qp != priv->qp->qp_num) { | |
218 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; | |
459a98ed | 219 | skb_reset_mac_header(skb); |
2439a6e6 RD |
220 | skb_pull(skb, IPOIB_ENCAP_LEN); |
221 | ||
222 | dev->last_rx = jiffies; | |
223 | ++priv->stats.rx_packets; | |
224 | priv->stats.rx_bytes += skb->len; | |
225 | ||
226 | skb->dev = dev; | |
227 | /* XXX get correct PACKET_ type here */ | |
228 | skb->pkt_type = PACKET_HOST; | |
229 | netif_rx_ni(skb); | |
1da177e4 | 230 | } else { |
2439a6e6 RD |
231 | ipoib_dbg_data(priv, "dropping loopback packet\n"); |
232 | dev_kfree_skb_any(skb); | |
233 | } | |
1da177e4 | 234 | |
2439a6e6 RD |
235 | repost: |
236 | if (unlikely(ipoib_ib_post_receive(dev, wr_id))) | |
237 | ipoib_warn(priv, "ipoib_ib_post_receive failed " | |
238 | "for buf %d\n", wr_id); | |
239 | } | |
1da177e4 | 240 | |
2439a6e6 RD |
241 | static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc) |
242 | { | |
243 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
244 | unsigned int wr_id = wc->wr_id; | |
245 | struct ipoib_tx_buf *tx_req; | |
246 | unsigned long flags; | |
1da177e4 | 247 | |
2439a6e6 RD |
248 | ipoib_dbg_data(priv, "send completion: id %d, op %d, status: %d\n", |
249 | wr_id, wc->opcode, wc->status); | |
1da177e4 | 250 | |
2439a6e6 RD |
251 | if (unlikely(wr_id >= ipoib_sendq_size)) { |
252 | ipoib_warn(priv, "send completion event with wrid %d (> %d)\n", | |
253 | wr_id, ipoib_sendq_size); | |
254 | return; | |
1da177e4 | 255 | } |
2439a6e6 RD |
256 | |
257 | tx_req = &priv->tx_ring[wr_id]; | |
258 | ||
37ccf9df RC |
259 | ib_dma_unmap_single(priv->ca, tx_req->mapping, |
260 | tx_req->skb->len, DMA_TO_DEVICE); | |
2439a6e6 RD |
261 | |
262 | ++priv->stats.tx_packets; | |
263 | priv->stats.tx_bytes += tx_req->skb->len; | |
264 | ||
265 | dev_kfree_skb_any(tx_req->skb); | |
266 | ||
267 | spin_lock_irqsave(&priv->tx_lock, flags); | |
268 | ++priv->tx_tail; | |
839fcaba MT |
269 | if (unlikely(test_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags)) && |
270 | priv->tx_head - priv->tx_tail <= ipoib_sendq_size >> 1) { | |
271 | clear_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags); | |
2439a6e6 | 272 | netif_wake_queue(dev); |
839fcaba | 273 | } |
2439a6e6 RD |
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 | ||
283 | static void ipoib_ib_handle_wc(struct net_device *dev, struct ib_wc *wc) | |
284 | { | |
839fcaba MT |
285 | if (wc->wr_id & IPOIB_CM_OP_SRQ) |
286 | ipoib_cm_handle_rx_wc(dev, wc); | |
287 | else if (wc->wr_id & IPOIB_OP_RECV) | |
2439a6e6 RD |
288 | ipoib_ib_handle_rx_wc(dev, wc); |
289 | else | |
290 | ipoib_ib_handle_tx_wc(dev, wc); | |
1da177e4 LT |
291 | } |
292 | ||
293 | void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) | |
294 | { | |
295 | struct net_device *dev = (struct net_device *) dev_ptr; | |
296 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
297 | int n, i; | |
298 | ||
299 | ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); | |
300 | do { | |
301 | n = ib_poll_cq(cq, IPOIB_NUM_WC, priv->ibwc); | |
302 | for (i = 0; i < n; ++i) | |
303 | ipoib_ib_handle_wc(dev, priv->ibwc + i); | |
304 | } while (n == IPOIB_NUM_WC); | |
305 | } | |
306 | ||
307 | static inline int post_send(struct ipoib_dev_priv *priv, | |
308 | unsigned int wr_id, | |
309 | struct ib_ah *address, u32 qpn, | |
37ccf9df | 310 | u64 addr, int len) |
1da177e4 LT |
311 | { |
312 | struct ib_send_wr *bad_wr; | |
313 | ||
314 | priv->tx_sge.addr = addr; | |
315 | priv->tx_sge.length = len; | |
316 | ||
317 | priv->tx_wr.wr_id = wr_id; | |
318 | priv->tx_wr.wr.ud.remote_qpn = qpn; | |
319 | priv->tx_wr.wr.ud.ah = address; | |
320 | ||
321 | return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr); | |
322 | } | |
323 | ||
324 | void ipoib_send(struct net_device *dev, struct sk_buff *skb, | |
325 | struct ipoib_ah *address, u32 qpn) | |
326 | { | |
327 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1993d683 | 328 | struct ipoib_tx_buf *tx_req; |
37ccf9df | 329 | u64 addr; |
1da177e4 | 330 | |
77d8e1ef | 331 | if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) { |
1da177e4 | 332 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", |
77d8e1ef | 333 | skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN); |
1da177e4 LT |
334 | ++priv->stats.tx_dropped; |
335 | ++priv->stats.tx_errors; | |
839fcaba | 336 | ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu); |
1da177e4 LT |
337 | return; |
338 | } | |
339 | ||
340 | ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n", | |
341 | skb->len, address, qpn); | |
342 | ||
343 | /* | |
344 | * We put the skb into the tx_ring _before_ we call post_send() | |
345 | * because it's entirely possible that the completion handler will | |
346 | * run before we execute anything after the post_send(). That | |
347 | * means we have to make sure everything is properly recorded and | |
348 | * our state is consistent before we call post_send(). | |
349 | */ | |
0f485251 | 350 | tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)]; |
1da177e4 | 351 | tx_req->skb = skb; |
37ccf9df RC |
352 | addr = ib_dma_map_single(priv->ca, skb->data, skb->len, |
353 | DMA_TO_DEVICE); | |
354 | if (unlikely(ib_dma_mapping_error(priv->ca, addr))) { | |
73fbe8be RD |
355 | ++priv->stats.tx_errors; |
356 | dev_kfree_skb_any(skb); | |
357 | return; | |
358 | } | |
37ccf9df | 359 | tx_req->mapping = addr; |
1da177e4 | 360 | |
0f485251 | 361 | if (unlikely(post_send(priv, priv->tx_head & (ipoib_sendq_size - 1), |
1da177e4 LT |
362 | address->ah, qpn, addr, skb->len))) { |
363 | ipoib_warn(priv, "post_send failed\n"); | |
364 | ++priv->stats.tx_errors; | |
37ccf9df | 365 | ib_dma_unmap_single(priv->ca, addr, skb->len, DMA_TO_DEVICE); |
1da177e4 LT |
366 | dev_kfree_skb_any(skb); |
367 | } else { | |
368 | dev->trans_start = jiffies; | |
369 | ||
370 | address->last_send = priv->tx_head; | |
371 | ++priv->tx_head; | |
372 | ||
0f485251 | 373 | if (priv->tx_head - priv->tx_tail == ipoib_sendq_size) { |
1da177e4 LT |
374 | ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); |
375 | netif_stop_queue(dev); | |
839fcaba | 376 | set_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags); |
1da177e4 LT |
377 | } |
378 | } | |
379 | } | |
380 | ||
381 | static void __ipoib_reap_ah(struct net_device *dev) | |
382 | { | |
383 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
384 | struct ipoib_ah *ah, *tah; | |
385 | LIST_HEAD(remove_list); | |
386 | ||
31c02e21 RD |
387 | spin_lock_irq(&priv->tx_lock); |
388 | spin_lock(&priv->lock); | |
1da177e4 | 389 | list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) |
2181858b | 390 | if ((int) priv->tx_tail - (int) ah->last_send >= 0) { |
1da177e4 | 391 | list_del(&ah->list); |
31c02e21 RD |
392 | ib_destroy_ah(ah->ah); |
393 | kfree(ah); | |
1da177e4 | 394 | } |
31c02e21 RD |
395 | spin_unlock(&priv->lock); |
396 | spin_unlock_irq(&priv->tx_lock); | |
1da177e4 LT |
397 | } |
398 | ||
c4028958 | 399 | void ipoib_reap_ah(struct work_struct *work) |
1da177e4 | 400 | { |
c4028958 DH |
401 | struct ipoib_dev_priv *priv = |
402 | container_of(work, struct ipoib_dev_priv, ah_reap_task.work); | |
403 | struct net_device *dev = priv->dev; | |
1da177e4 LT |
404 | |
405 | __ipoib_reap_ah(dev); | |
406 | ||
407 | if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) | |
408 | queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ); | |
409 | } | |
410 | ||
411 | int ipoib_ib_dev_open(struct net_device *dev) | |
412 | { | |
413 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
414 | int ret; | |
415 | ||
5b6810e0 | 416 | ret = ipoib_init_qp(dev); |
1da177e4 | 417 | if (ret) { |
5b6810e0 | 418 | ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); |
1da177e4 LT |
419 | return -1; |
420 | } | |
421 | ||
422 | ret = ipoib_ib_post_receives(dev); | |
423 | if (ret) { | |
424 | ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); | |
54d07e2a | 425 | ipoib_ib_dev_stop(dev); |
1da177e4 LT |
426 | return -1; |
427 | } | |
428 | ||
839fcaba MT |
429 | ret = ipoib_cm_dev_open(dev); |
430 | if (ret) { | |
431 | ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); | |
432 | ipoib_ib_dev_stop(dev); | |
433 | return -1; | |
434 | } | |
435 | ||
1da177e4 LT |
436 | clear_bit(IPOIB_STOP_REAPER, &priv->flags); |
437 | queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ); | |
438 | ||
7a343d4c LA |
439 | set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
440 | ||
1da177e4 LT |
441 | return 0; |
442 | } | |
443 | ||
7a343d4c LA |
444 | static void ipoib_pkey_dev_check_presence(struct net_device *dev) |
445 | { | |
446 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
447 | u16 pkey_index = 0; | |
448 | ||
449 | if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) | |
450 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
451 | else | |
452 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
453 | } | |
454 | ||
1da177e4 LT |
455 | int ipoib_ib_dev_up(struct net_device *dev) |
456 | { | |
457 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
458 | ||
7a343d4c LA |
459 | ipoib_pkey_dev_check_presence(dev); |
460 | ||
461 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
462 | ipoib_dbg(priv, "PKEY is not assigned.\n"); | |
463 | return 0; | |
464 | } | |
465 | ||
1da177e4 LT |
466 | set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); |
467 | ||
468 | return ipoib_mcast_start_thread(dev); | |
469 | } | |
470 | ||
0b3ea082 | 471 | int ipoib_ib_dev_down(struct net_device *dev, int flush) |
1da177e4 LT |
472 | { |
473 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
474 | ||
475 | ipoib_dbg(priv, "downing ib_dev\n"); | |
476 | ||
477 | clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
478 | netif_carrier_off(dev); | |
479 | ||
480 | /* Shutdown the P_Key thread if still active */ | |
481 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
95ed644f | 482 | mutex_lock(&pkey_mutex); |
1da177e4 LT |
483 | set_bit(IPOIB_PKEY_STOP, &priv->flags); |
484 | cancel_delayed_work(&priv->pkey_task); | |
95ed644f | 485 | mutex_unlock(&pkey_mutex); |
0b3ea082 JM |
486 | if (flush) |
487 | flush_workqueue(ipoib_workqueue); | |
1da177e4 LT |
488 | } |
489 | ||
0b3ea082 | 490 | ipoib_mcast_stop_thread(dev, flush); |
1da177e4 LT |
491 | ipoib_mcast_dev_flush(dev); |
492 | ||
1da177e4 LT |
493 | ipoib_flush_paths(dev); |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
498 | static int recvs_pending(struct net_device *dev) | |
499 | { | |
500 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
501 | int pending = 0; | |
502 | int i; | |
503 | ||
0f485251 | 504 | for (i = 0; i < ipoib_recvq_size; ++i) |
1da177e4 LT |
505 | if (priv->rx_ring[i].skb) |
506 | ++pending; | |
507 | ||
508 | return pending; | |
509 | } | |
510 | ||
511 | int ipoib_ib_dev_stop(struct net_device *dev) | |
512 | { | |
513 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
514 | struct ib_qp_attr qp_attr; | |
1da177e4 | 515 | unsigned long begin; |
1993d683 | 516 | struct ipoib_tx_buf *tx_req; |
1da177e4 LT |
517 | int i; |
518 | ||
7a343d4c LA |
519 | clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
520 | ||
839fcaba MT |
521 | ipoib_cm_dev_stop(dev); |
522 | ||
3bc12e75 RD |
523 | /* |
524 | * Move our QP to the error state and then reinitialize in | |
525 | * when all work requests have completed or have been flushed. | |
526 | */ | |
1da177e4 | 527 | qp_attr.qp_state = IB_QPS_ERR; |
3bc12e75 | 528 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
1da177e4 LT |
529 | ipoib_warn(priv, "Failed to modify QP to ERROR state\n"); |
530 | ||
531 | /* Wait for all sends and receives to complete */ | |
532 | begin = jiffies; | |
533 | ||
534 | while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) { | |
535 | if (time_after(jiffies, begin + 5 * HZ)) { | |
536 | ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", | |
537 | priv->tx_head - priv->tx_tail, recvs_pending(dev)); | |
538 | ||
539 | /* | |
540 | * assume the HW is wedged and just free up | |
541 | * all our pending work requests. | |
542 | */ | |
2181858b | 543 | while ((int) priv->tx_tail - (int) priv->tx_head < 0) { |
1da177e4 | 544 | tx_req = &priv->tx_ring[priv->tx_tail & |
0f485251 | 545 | (ipoib_sendq_size - 1)]; |
37ccf9df RC |
546 | ib_dma_unmap_single(priv->ca, |
547 | tx_req->mapping, | |
548 | tx_req->skb->len, | |
549 | DMA_TO_DEVICE); | |
1da177e4 LT |
550 | dev_kfree_skb_any(tx_req->skb); |
551 | ++priv->tx_tail; | |
552 | } | |
553 | ||
37ccf9df RC |
554 | for (i = 0; i < ipoib_recvq_size; ++i) { |
555 | struct ipoib_rx_buf *rx_req; | |
556 | ||
557 | rx_req = &priv->rx_ring[i]; | |
558 | if (!rx_req->skb) | |
559 | continue; | |
560 | ib_dma_unmap_single(priv->ca, | |
561 | rx_req->mapping, | |
562 | IPOIB_BUF_SIZE, | |
563 | DMA_FROM_DEVICE); | |
564 | dev_kfree_skb_any(rx_req->skb); | |
565 | rx_req->skb = NULL; | |
566 | } | |
1da177e4 LT |
567 | |
568 | goto timeout; | |
569 | } | |
570 | ||
571 | msleep(1); | |
572 | } | |
573 | ||
574 | ipoib_dbg(priv, "All sends and receives done.\n"); | |
575 | ||
576 | timeout: | |
577 | qp_attr.qp_state = IB_QPS_RESET; | |
3bc12e75 | 578 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
1da177e4 LT |
579 | ipoib_warn(priv, "Failed to modify QP to RESET state\n"); |
580 | ||
581 | /* Wait for all AHs to be reaped */ | |
582 | set_bit(IPOIB_STOP_REAPER, &priv->flags); | |
583 | cancel_delayed_work(&priv->ah_reap_task); | |
584 | flush_workqueue(ipoib_workqueue); | |
585 | ||
586 | begin = jiffies; | |
587 | ||
588 | while (!list_empty(&priv->dead_ahs)) { | |
589 | __ipoib_reap_ah(dev); | |
590 | ||
591 | if (time_after(jiffies, begin + HZ)) { | |
592 | ipoib_warn(priv, "timing out; will leak address handles\n"); | |
593 | break; | |
594 | } | |
595 | ||
596 | msleep(1); | |
597 | } | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
602 | int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
603 | { | |
604 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
605 | ||
606 | priv->ca = ca; | |
607 | priv->port = port; | |
608 | priv->qp = NULL; | |
609 | ||
610 | if (ipoib_transport_dev_init(dev, ca)) { | |
611 | printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); | |
612 | return -ENODEV; | |
613 | } | |
614 | ||
615 | if (dev->flags & IFF_UP) { | |
616 | if (ipoib_ib_dev_open(dev)) { | |
617 | ipoib_transport_dev_cleanup(dev); | |
618 | return -ENODEV; | |
619 | } | |
620 | } | |
621 | ||
622 | return 0; | |
623 | } | |
624 | ||
c4028958 | 625 | void ipoib_ib_dev_flush(struct work_struct *work) |
1da177e4 | 626 | { |
c4028958 DH |
627 | struct ipoib_dev_priv *cpriv, *priv = |
628 | container_of(work, struct ipoib_dev_priv, flush_task); | |
629 | struct net_device *dev = priv->dev; | |
1da177e4 | 630 | |
7a343d4c LA |
631 | if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) ) { |
632 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); | |
633 | return; | |
634 | } | |
635 | ||
636 | if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { | |
637 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); | |
1da177e4 | 638 | return; |
7a343d4c | 639 | } |
1da177e4 LT |
640 | |
641 | ipoib_dbg(priv, "flushing\n"); | |
642 | ||
0b3ea082 | 643 | ipoib_ib_dev_down(dev, 0); |
1da177e4 LT |
644 | |
645 | /* | |
646 | * The device could have been brought down between the start and when | |
647 | * we get here, don't bring it back up if it's not configured up | |
648 | */ | |
5ccd0255 | 649 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { |
1da177e4 | 650 | ipoib_ib_dev_up(dev); |
c4028958 | 651 | ipoib_mcast_restart_task(&priv->restart_task); |
5ccd0255 | 652 | } |
1da177e4 | 653 | |
95ed644f | 654 | mutex_lock(&priv->vlan_mutex); |
4f71055a | 655 | |
1da177e4 LT |
656 | /* Flush any child interfaces too */ |
657 | list_for_each_entry(cpriv, &priv->child_intfs, list) | |
c4028958 | 658 | ipoib_ib_dev_flush(&cpriv->flush_task); |
4f71055a | 659 | |
95ed644f | 660 | mutex_unlock(&priv->vlan_mutex); |
1da177e4 LT |
661 | } |
662 | ||
663 | void ipoib_ib_dev_cleanup(struct net_device *dev) | |
664 | { | |
665 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
666 | ||
667 | ipoib_dbg(priv, "cleaning up ib_dev\n"); | |
668 | ||
8d2cae06 | 669 | ipoib_mcast_stop_thread(dev, 1); |
988bd503 | 670 | ipoib_mcast_dev_flush(dev); |
1da177e4 LT |
671 | |
672 | ipoib_transport_dev_cleanup(dev); | |
673 | } | |
674 | ||
675 | /* | |
676 | * Delayed P_Key Assigment Interim Support | |
677 | * | |
678 | * The following is initial implementation of delayed P_Key assigment | |
679 | * mechanism. It is using the same approach implemented for the multicast | |
680 | * group join. The single goal of this implementation is to quickly address | |
681 | * Bug #2507. This implementation will probably be removed when the P_Key | |
682 | * change async notification is available. | |
683 | */ | |
1da177e4 | 684 | |
c4028958 | 685 | void ipoib_pkey_poll(struct work_struct *work) |
1da177e4 | 686 | { |
c4028958 DH |
687 | struct ipoib_dev_priv *priv = |
688 | container_of(work, struct ipoib_dev_priv, pkey_task.work); | |
689 | struct net_device *dev = priv->dev; | |
1da177e4 LT |
690 | |
691 | ipoib_pkey_dev_check_presence(dev); | |
692 | ||
693 | if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) | |
694 | ipoib_open(dev); | |
695 | else { | |
95ed644f | 696 | mutex_lock(&pkey_mutex); |
1da177e4 LT |
697 | if (!test_bit(IPOIB_PKEY_STOP, &priv->flags)) |
698 | queue_delayed_work(ipoib_workqueue, | |
699 | &priv->pkey_task, | |
700 | HZ); | |
95ed644f | 701 | mutex_unlock(&pkey_mutex); |
1da177e4 LT |
702 | } |
703 | } | |
704 | ||
705 | int ipoib_pkey_dev_delay_open(struct net_device *dev) | |
706 | { | |
707 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
708 | ||
709 | /* Look for the interface pkey value in the IB Port P_Key table and */ | |
710 | /* set the interface pkey assigment flag */ | |
711 | ipoib_pkey_dev_check_presence(dev); | |
712 | ||
713 | /* P_Key value not assigned yet - start polling */ | |
714 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
95ed644f | 715 | mutex_lock(&pkey_mutex); |
1da177e4 LT |
716 | clear_bit(IPOIB_PKEY_STOP, &priv->flags); |
717 | queue_delayed_work(ipoib_workqueue, | |
718 | &priv->pkey_task, | |
719 | HZ); | |
95ed644f | 720 | mutex_unlock(&pkey_mutex); |
1da177e4 LT |
721 | return 1; |
722 | } | |
723 | ||
724 | return 0; | |
725 | } |