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> |
40ca1988 EC |
42 | #include <linux/ip.h> |
43 | #include <linux/tcp.h> | |
1da177e4 LT |
44 | |
45 | #include "ipoib.h" | |
46 | ||
47 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA | |
48 | static int data_debug_level; | |
49 | ||
50 | module_param(data_debug_level, int, 0644); | |
51 | MODULE_PARM_DESC(data_debug_level, | |
52 | "Enable data path debug tracing if > 0"); | |
53 | #endif | |
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 | ||
31c02e21 RD |
87 | spin_lock_irqsave(&priv->lock, flags); |
88 | list_add_tail(&ah->list, &priv->dead_ahs); | |
89 | spin_unlock_irqrestore(&priv->lock, flags); | |
1da177e4 LT |
90 | } |
91 | ||
bc7b3a36 SM |
92 | static void ipoib_ud_dma_unmap_rx(struct ipoib_dev_priv *priv, |
93 | u64 mapping[IPOIB_UD_RX_SG]) | |
94 | { | |
95 | if (ipoib_ud_need_sg(priv->max_ib_mtu)) { | |
96 | ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_UD_HEAD_SIZE, | |
97 | DMA_FROM_DEVICE); | |
98 | ib_dma_unmap_page(priv->ca, mapping[1], PAGE_SIZE, | |
99 | DMA_FROM_DEVICE); | |
100 | } else | |
101 | ib_dma_unmap_single(priv->ca, mapping[0], | |
102 | IPOIB_UD_BUF_SIZE(priv->max_ib_mtu), | |
103 | DMA_FROM_DEVICE); | |
104 | } | |
105 | ||
106 | static void ipoib_ud_skb_put_frags(struct ipoib_dev_priv *priv, | |
107 | struct sk_buff *skb, | |
108 | unsigned int length) | |
109 | { | |
110 | if (ipoib_ud_need_sg(priv->max_ib_mtu)) { | |
111 | skb_frag_t *frag = &skb_shinfo(skb)->frags[0]; | |
112 | unsigned int size; | |
113 | /* | |
114 | * There is only two buffers needed for max_payload = 4K, | |
115 | * first buf size is IPOIB_UD_HEAD_SIZE | |
116 | */ | |
117 | skb->tail += IPOIB_UD_HEAD_SIZE; | |
118 | skb->len += length; | |
119 | ||
120 | size = length - IPOIB_UD_HEAD_SIZE; | |
121 | ||
122 | frag->size = size; | |
123 | skb->data_len += size; | |
124 | skb->truesize += size; | |
125 | } else | |
126 | skb_put(skb, length); | |
127 | ||
128 | } | |
129 | ||
1993d683 | 130 | static int ipoib_ib_post_receive(struct net_device *dev, int id) |
1da177e4 | 131 | { |
1993d683 | 132 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
1da177e4 | 133 | struct ib_recv_wr *bad_wr; |
1993d683 RD |
134 | int ret; |
135 | ||
bc7b3a36 SM |
136 | priv->rx_wr.wr_id = id | IPOIB_OP_RECV; |
137 | priv->rx_sge[0].addr = priv->rx_ring[id].mapping[0]; | |
138 | priv->rx_sge[1].addr = priv->rx_ring[id].mapping[1]; | |
1993d683 | 139 | |
1993d683 | 140 | |
bc7b3a36 | 141 | ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr); |
1993d683 RD |
142 | if (unlikely(ret)) { |
143 | ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret); | |
bc7b3a36 | 144 | ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[id].mapping); |
1993d683 RD |
145 | dev_kfree_skb_any(priv->rx_ring[id].skb); |
146 | priv->rx_ring[id].skb = NULL; | |
147 | } | |
1da177e4 | 148 | |
1993d683 | 149 | return ret; |
1da177e4 LT |
150 | } |
151 | ||
bc7b3a36 | 152 | static struct sk_buff *ipoib_alloc_rx_skb(struct net_device *dev, int id) |
1da177e4 LT |
153 | { |
154 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
155 | struct sk_buff *skb; | |
bc7b3a36 SM |
156 | int buf_size; |
157 | u64 *mapping; | |
1da177e4 | 158 | |
bc7b3a36 SM |
159 | if (ipoib_ud_need_sg(priv->max_ib_mtu)) |
160 | buf_size = IPOIB_UD_HEAD_SIZE; | |
161 | else | |
162 | buf_size = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu); | |
163 | ||
164 | skb = dev_alloc_skb(buf_size + 4); | |
165 | if (unlikely(!skb)) | |
166 | return NULL; | |
1993d683 RD |
167 | |
168 | /* | |
169 | * IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte | |
170 | * header. So we need 4 more bytes to get to 48 and align the | |
171 | * IP header to a multiple of 16. | |
172 | */ | |
173 | skb_reserve(skb, 4); | |
174 | ||
bc7b3a36 SM |
175 | mapping = priv->rx_ring[id].mapping; |
176 | mapping[0] = ib_dma_map_single(priv->ca, skb->data, buf_size, | |
177 | DMA_FROM_DEVICE); | |
178 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0]))) | |
179 | goto error; | |
180 | ||
181 | if (ipoib_ud_need_sg(priv->max_ib_mtu)) { | |
182 | struct page *page = alloc_page(GFP_ATOMIC); | |
183 | if (!page) | |
184 | goto partial_error; | |
185 | skb_fill_page_desc(skb, 0, page, 0, PAGE_SIZE); | |
186 | mapping[1] = | |
187 | ib_dma_map_page(priv->ca, skb_shinfo(skb)->frags[0].page, | |
188 | 0, PAGE_SIZE, DMA_FROM_DEVICE); | |
189 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[1]))) | |
190 | goto partial_error; | |
1da177e4 LT |
191 | } |
192 | ||
bc7b3a36 SM |
193 | priv->rx_ring[id].skb = skb; |
194 | return skb; | |
1993d683 | 195 | |
bc7b3a36 SM |
196 | partial_error: |
197 | ib_dma_unmap_single(priv->ca, mapping[0], buf_size, DMA_FROM_DEVICE); | |
198 | error: | |
199 | dev_kfree_skb_any(skb); | |
200 | return NULL; | |
1da177e4 LT |
201 | } |
202 | ||
203 | static int ipoib_ib_post_receives(struct net_device *dev) | |
204 | { | |
205 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
206 | int i; | |
207 | ||
0f485251 | 208 | for (i = 0; i < ipoib_recvq_size; ++i) { |
bc7b3a36 | 209 | if (!ipoib_alloc_rx_skb(dev, i)) { |
1993d683 RD |
210 | ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); |
211 | return -ENOMEM; | |
212 | } | |
1da177e4 LT |
213 | if (ipoib_ib_post_receive(dev, i)) { |
214 | ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i); | |
215 | return -EIO; | |
216 | } | |
217 | } | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
2439a6e6 | 222 | static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) |
1da177e4 LT |
223 | { |
224 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
2439a6e6 RD |
225 | unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV; |
226 | struct sk_buff *skb; | |
bc7b3a36 | 227 | u64 mapping[IPOIB_UD_RX_SG]; |
1da177e4 | 228 | |
a89875fc RD |
229 | ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n", |
230 | wr_id, wc->status); | |
1da177e4 | 231 | |
2439a6e6 RD |
232 | if (unlikely(wr_id >= ipoib_recvq_size)) { |
233 | ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n", | |
234 | wr_id, ipoib_recvq_size); | |
235 | return; | |
236 | } | |
237 | ||
238 | skb = priv->rx_ring[wr_id].skb; | |
2439a6e6 RD |
239 | |
240 | if (unlikely(wc->status != IB_WC_SUCCESS)) { | |
241 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
242 | ipoib_warn(priv, "failed recv event " | |
243 | "(status=%d, wrid=%d vend_err %x)\n", | |
244 | wc->status, wr_id, wc->vendor_err); | |
bc7b3a36 | 245 | ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[wr_id].mapping); |
2439a6e6 RD |
246 | dev_kfree_skb_any(skb); |
247 | priv->rx_ring[wr_id].skb = NULL; | |
248 | return; | |
249 | } | |
1da177e4 | 250 | |
1b844afe RD |
251 | /* |
252 | * Drop packets that this interface sent, ie multicast packets | |
253 | * that the HCA has replicated. | |
254 | */ | |
255 | if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num) | |
256 | goto repost; | |
257 | ||
bc7b3a36 SM |
258 | memcpy(mapping, priv->rx_ring[wr_id].mapping, |
259 | IPOIB_UD_RX_SG * sizeof *mapping); | |
260 | ||
2439a6e6 RD |
261 | /* |
262 | * If we can't allocate a new RX buffer, dump | |
263 | * this packet and reuse the old buffer. | |
264 | */ | |
bc7b3a36 | 265 | if (unlikely(!ipoib_alloc_rx_skb(dev, wr_id))) { |
de903512 | 266 | ++dev->stats.rx_dropped; |
2439a6e6 RD |
267 | goto repost; |
268 | } | |
269 | ||
270 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", | |
271 | wc->byte_len, wc->slid); | |
272 | ||
bc7b3a36 SM |
273 | ipoib_ud_dma_unmap_rx(priv, mapping); |
274 | ipoib_ud_skb_put_frags(priv, skb, wc->byte_len); | |
2439a6e6 | 275 | |
2439a6e6 RD |
276 | skb_pull(skb, IB_GRH_BYTES); |
277 | ||
1b844afe RD |
278 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; |
279 | skb_reset_mac_header(skb); | |
280 | skb_pull(skb, IPOIB_ENCAP_LEN); | |
281 | ||
282 | dev->last_rx = jiffies; | |
de903512 RD |
283 | ++dev->stats.rx_packets; |
284 | dev->stats.rx_bytes += skb->len; | |
1b844afe RD |
285 | |
286 | skb->dev = dev; | |
287 | /* XXX get correct PACKET_ type here */ | |
288 | skb->pkt_type = PACKET_HOST; | |
6046136c EC |
289 | |
290 | if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->csum_ok)) | |
291 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
292 | ||
1b844afe | 293 | netif_receive_skb(skb); |
1da177e4 | 294 | |
2439a6e6 RD |
295 | repost: |
296 | if (unlikely(ipoib_ib_post_receive(dev, wr_id))) | |
297 | ipoib_warn(priv, "ipoib_ib_post_receive failed " | |
298 | "for buf %d\n", wr_id); | |
299 | } | |
1da177e4 | 300 | |
7143740d EC |
301 | static int ipoib_dma_map_tx(struct ib_device *ca, |
302 | struct ipoib_tx_buf *tx_req) | |
303 | { | |
304 | struct sk_buff *skb = tx_req->skb; | |
305 | u64 *mapping = tx_req->mapping; | |
306 | int i; | |
40ca1988 | 307 | int off; |
7143740d | 308 | |
40ca1988 EC |
309 | if (skb_headlen(skb)) { |
310 | mapping[0] = ib_dma_map_single(ca, skb->data, skb_headlen(skb), | |
311 | DMA_TO_DEVICE); | |
312 | if (unlikely(ib_dma_mapping_error(ca, mapping[0]))) | |
313 | return -EIO; | |
314 | ||
315 | off = 1; | |
316 | } else | |
317 | off = 0; | |
7143740d EC |
318 | |
319 | for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { | |
320 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
40ca1988 | 321 | mapping[i + off] = ib_dma_map_page(ca, frag->page, |
7143740d EC |
322 | frag->page_offset, frag->size, |
323 | DMA_TO_DEVICE); | |
40ca1988 | 324 | if (unlikely(ib_dma_mapping_error(ca, mapping[i + off]))) |
7143740d EC |
325 | goto partial_error; |
326 | } | |
327 | return 0; | |
328 | ||
329 | partial_error: | |
7143740d EC |
330 | for (; i > 0; --i) { |
331 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1]; | |
40ca1988 | 332 | ib_dma_unmap_page(ca, mapping[i - !off], frag->size, DMA_TO_DEVICE); |
7143740d | 333 | } |
40ca1988 EC |
334 | |
335 | if (off) | |
336 | ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE); | |
337 | ||
7143740d EC |
338 | return -EIO; |
339 | } | |
340 | ||
341 | static void ipoib_dma_unmap_tx(struct ib_device *ca, | |
342 | struct ipoib_tx_buf *tx_req) | |
343 | { | |
344 | struct sk_buff *skb = tx_req->skb; | |
345 | u64 *mapping = tx_req->mapping; | |
346 | int i; | |
40ca1988 | 347 | int off; |
7143740d | 348 | |
40ca1988 EC |
349 | if (skb_headlen(skb)) { |
350 | ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE); | |
351 | off = 1; | |
352 | } else | |
353 | off = 0; | |
7143740d EC |
354 | |
355 | for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { | |
356 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
40ca1988 | 357 | ib_dma_unmap_page(ca, mapping[i + off], frag->size, |
7143740d EC |
358 | DMA_TO_DEVICE); |
359 | } | |
360 | } | |
361 | ||
2439a6e6 RD |
362 | static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc) |
363 | { | |
364 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
365 | unsigned int wr_id = wc->wr_id; | |
366 | struct ipoib_tx_buf *tx_req; | |
367 | unsigned long flags; | |
1da177e4 | 368 | |
a89875fc RD |
369 | ipoib_dbg_data(priv, "send completion: id %d, status: %d\n", |
370 | wr_id, wc->status); | |
1da177e4 | 371 | |
2439a6e6 RD |
372 | if (unlikely(wr_id >= ipoib_sendq_size)) { |
373 | ipoib_warn(priv, "send completion event with wrid %d (> %d)\n", | |
374 | wr_id, ipoib_sendq_size); | |
375 | return; | |
1da177e4 | 376 | } |
2439a6e6 RD |
377 | |
378 | tx_req = &priv->tx_ring[wr_id]; | |
379 | ||
7143740d | 380 | ipoib_dma_unmap_tx(priv->ca, tx_req); |
2439a6e6 | 381 | |
de903512 RD |
382 | ++dev->stats.tx_packets; |
383 | dev->stats.tx_bytes += tx_req->skb->len; | |
2439a6e6 RD |
384 | |
385 | dev_kfree_skb_any(tx_req->skb); | |
386 | ||
387 | spin_lock_irqsave(&priv->tx_lock, flags); | |
388 | ++priv->tx_tail; | |
1b524963 MT |
389 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
390 | netif_queue_stopped(dev) && | |
391 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
2439a6e6 RD |
392 | netif_wake_queue(dev); |
393 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
394 | ||
395 | if (wc->status != IB_WC_SUCCESS && | |
396 | wc->status != IB_WC_WR_FLUSH_ERR) | |
397 | ipoib_warn(priv, "failed send event " | |
398 | "(status=%d, wrid=%d vend_err %x)\n", | |
399 | wc->status, wr_id, wc->vendor_err); | |
400 | } | |
401 | ||
bea3348e | 402 | int ipoib_poll(struct napi_struct *napi, int budget) |
2439a6e6 | 403 | { |
bea3348e SH |
404 | struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi); |
405 | struct net_device *dev = priv->dev; | |
8d1cc86a RD |
406 | int done; |
407 | int t; | |
8d1cc86a RD |
408 | int n, i; |
409 | ||
410 | done = 0; | |
8d1cc86a | 411 | |
bea3348e SH |
412 | poll_more: |
413 | while (done < budget) { | |
414 | int max = (budget - done); | |
415 | ||
8d1cc86a RD |
416 | t = min(IPOIB_NUM_WC, max); |
417 | n = ib_poll_cq(priv->cq, t, priv->ibwc); | |
418 | ||
bea3348e | 419 | for (i = 0; i < n; i++) { |
8d1cc86a RD |
420 | struct ib_wc *wc = priv->ibwc + i; |
421 | ||
1b524963 | 422 | if (wc->wr_id & IPOIB_OP_RECV) { |
8d1cc86a | 423 | ++done; |
1b524963 MT |
424 | if (wc->wr_id & IPOIB_OP_CM) |
425 | ipoib_cm_handle_rx_wc(dev, wc); | |
426 | else | |
427 | ipoib_ib_handle_rx_wc(dev, wc); | |
428 | } else { | |
429 | if (wc->wr_id & IPOIB_OP_CM) | |
430 | ipoib_cm_handle_tx_wc(dev, wc); | |
431 | else | |
432 | ipoib_ib_handle_tx_wc(dev, wc); | |
433 | } | |
8d1cc86a RD |
434 | } |
435 | ||
bea3348e | 436 | if (n != t) |
8d1cc86a | 437 | break; |
8d1cc86a RD |
438 | } |
439 | ||
bea3348e SH |
440 | if (done < budget) { |
441 | netif_rx_complete(dev, napi); | |
8d1cc86a RD |
442 | if (unlikely(ib_req_notify_cq(priv->cq, |
443 | IB_CQ_NEXT_COMP | | |
444 | IB_CQ_REPORT_MISSED_EVENTS)) && | |
bea3348e SH |
445 | netif_rx_reschedule(dev, napi)) |
446 | goto poll_more; | |
8d1cc86a RD |
447 | } |
448 | ||
bea3348e | 449 | return done; |
1da177e4 LT |
450 | } |
451 | ||
452 | void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) | |
453 | { | |
bea3348e SH |
454 | struct net_device *dev = dev_ptr; |
455 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
456 | ||
457 | netif_rx_schedule(dev, &priv->napi); | |
1da177e4 LT |
458 | } |
459 | ||
460 | static inline int post_send(struct ipoib_dev_priv *priv, | |
461 | unsigned int wr_id, | |
462 | struct ib_ah *address, u32 qpn, | |
40ca1988 EC |
463 | struct ipoib_tx_buf *tx_req, |
464 | void *head, int hlen) | |
1da177e4 LT |
465 | { |
466 | struct ib_send_wr *bad_wr; | |
40ca1988 EC |
467 | int i, off; |
468 | struct sk_buff *skb = tx_req->skb; | |
469 | skb_frag_t *frags = skb_shinfo(skb)->frags; | |
470 | int nr_frags = skb_shinfo(skb)->nr_frags; | |
471 | u64 *mapping = tx_req->mapping; | |
472 | ||
473 | if (skb_headlen(skb)) { | |
474 | priv->tx_sge[0].addr = mapping[0]; | |
475 | priv->tx_sge[0].length = skb_headlen(skb); | |
476 | off = 1; | |
477 | } else | |
478 | off = 0; | |
1da177e4 | 479 | |
7143740d | 480 | for (i = 0; i < nr_frags; ++i) { |
40ca1988 EC |
481 | priv->tx_sge[i + off].addr = mapping[i + off]; |
482 | priv->tx_sge[i + off].length = frags[i].size; | |
7143740d | 483 | } |
40ca1988 | 484 | priv->tx_wr.num_sge = nr_frags + off; |
7143740d EC |
485 | priv->tx_wr.wr_id = wr_id; |
486 | priv->tx_wr.wr.ud.remote_qpn = qpn; | |
487 | priv->tx_wr.wr.ud.ah = address; | |
1da177e4 | 488 | |
40ca1988 EC |
489 | if (head) { |
490 | priv->tx_wr.wr.ud.mss = skb_shinfo(skb)->gso_size; | |
491 | priv->tx_wr.wr.ud.header = head; | |
492 | priv->tx_wr.wr.ud.hlen = hlen; | |
493 | priv->tx_wr.opcode = IB_WR_LSO; | |
494 | } else | |
495 | priv->tx_wr.opcode = IB_WR_SEND; | |
496 | ||
1da177e4 LT |
497 | return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr); |
498 | } | |
499 | ||
500 | void ipoib_send(struct net_device *dev, struct sk_buff *skb, | |
501 | struct ipoib_ah *address, u32 qpn) | |
502 | { | |
503 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1993d683 | 504 | struct ipoib_tx_buf *tx_req; |
40ca1988 EC |
505 | int hlen; |
506 | void *phead; | |
507 | ||
508 | if (skb_is_gso(skb)) { | |
509 | hlen = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
510 | phead = skb->data; | |
511 | if (unlikely(!skb_pull(skb, hlen))) { | |
512 | ipoib_warn(priv, "linear data too small\n"); | |
513 | ++dev->stats.tx_dropped; | |
514 | ++dev->stats.tx_errors; | |
515 | dev_kfree_skb_any(skb); | |
516 | return; | |
517 | } | |
518 | } else { | |
519 | if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) { | |
520 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", | |
521 | skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN); | |
522 | ++dev->stats.tx_dropped; | |
523 | ++dev->stats.tx_errors; | |
524 | ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu); | |
525 | return; | |
526 | } | |
527 | phead = NULL; | |
528 | hlen = 0; | |
1da177e4 LT |
529 | } |
530 | ||
531 | ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n", | |
532 | skb->len, address, qpn); | |
533 | ||
534 | /* | |
535 | * We put the skb into the tx_ring _before_ we call post_send() | |
536 | * because it's entirely possible that the completion handler will | |
537 | * run before we execute anything after the post_send(). That | |
538 | * means we have to make sure everything is properly recorded and | |
539 | * our state is consistent before we call post_send(). | |
540 | */ | |
0f485251 | 541 | tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)]; |
1da177e4 | 542 | tx_req->skb = skb; |
7143740d | 543 | if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) { |
de903512 | 544 | ++dev->stats.tx_errors; |
73fbe8be RD |
545 | dev_kfree_skb_any(skb); |
546 | return; | |
547 | } | |
1da177e4 | 548 | |
6046136c EC |
549 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
550 | priv->tx_wr.send_flags |= IB_SEND_IP_CSUM; | |
551 | else | |
552 | priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM; | |
553 | ||
0f485251 | 554 | if (unlikely(post_send(priv, priv->tx_head & (ipoib_sendq_size - 1), |
40ca1988 | 555 | address->ah, qpn, tx_req, phead, hlen))) { |
1da177e4 | 556 | ipoib_warn(priv, "post_send failed\n"); |
de903512 | 557 | ++dev->stats.tx_errors; |
7143740d | 558 | ipoib_dma_unmap_tx(priv->ca, tx_req); |
1da177e4 LT |
559 | dev_kfree_skb_any(skb); |
560 | } else { | |
561 | dev->trans_start = jiffies; | |
562 | ||
563 | address->last_send = priv->tx_head; | |
564 | ++priv->tx_head; | |
565 | ||
1b524963 | 566 | if (++priv->tx_outstanding == ipoib_sendq_size) { |
1da177e4 LT |
567 | ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); |
568 | netif_stop_queue(dev); | |
569 | } | |
570 | } | |
571 | } | |
572 | ||
573 | static void __ipoib_reap_ah(struct net_device *dev) | |
574 | { | |
575 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
576 | struct ipoib_ah *ah, *tah; | |
577 | LIST_HEAD(remove_list); | |
578 | ||
31c02e21 RD |
579 | spin_lock_irq(&priv->tx_lock); |
580 | spin_lock(&priv->lock); | |
1da177e4 | 581 | list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) |
2181858b | 582 | if ((int) priv->tx_tail - (int) ah->last_send >= 0) { |
1da177e4 | 583 | list_del(&ah->list); |
31c02e21 RD |
584 | ib_destroy_ah(ah->ah); |
585 | kfree(ah); | |
1da177e4 | 586 | } |
31c02e21 RD |
587 | spin_unlock(&priv->lock); |
588 | spin_unlock_irq(&priv->tx_lock); | |
1da177e4 LT |
589 | } |
590 | ||
c4028958 | 591 | void ipoib_reap_ah(struct work_struct *work) |
1da177e4 | 592 | { |
c4028958 DH |
593 | struct ipoib_dev_priv *priv = |
594 | container_of(work, struct ipoib_dev_priv, ah_reap_task.work); | |
595 | struct net_device *dev = priv->dev; | |
1da177e4 LT |
596 | |
597 | __ipoib_reap_ah(dev); | |
598 | ||
599 | if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) | |
69fc507a AB |
600 | queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, |
601 | round_jiffies_relative(HZ)); | |
1da177e4 LT |
602 | } |
603 | ||
604 | int ipoib_ib_dev_open(struct net_device *dev) | |
605 | { | |
606 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
607 | int ret; | |
608 | ||
26bbf13c YE |
609 | if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) { |
610 | ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey); | |
611 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
612 | return -1; | |
613 | } | |
614 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
615 | ||
5b6810e0 | 616 | ret = ipoib_init_qp(dev); |
1da177e4 | 617 | if (ret) { |
5b6810e0 | 618 | ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); |
1da177e4 LT |
619 | return -1; |
620 | } | |
621 | ||
622 | ret = ipoib_ib_post_receives(dev); | |
623 | if (ret) { | |
624 | ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); | |
26bbf13c | 625 | ipoib_ib_dev_stop(dev, 1); |
1da177e4 LT |
626 | return -1; |
627 | } | |
628 | ||
839fcaba MT |
629 | ret = ipoib_cm_dev_open(dev); |
630 | if (ret) { | |
24bd1e4e | 631 | ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret); |
26bbf13c | 632 | ipoib_ib_dev_stop(dev, 1); |
839fcaba MT |
633 | return -1; |
634 | } | |
635 | ||
1da177e4 | 636 | clear_bit(IPOIB_STOP_REAPER, &priv->flags); |
69fc507a AB |
637 | queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, |
638 | round_jiffies_relative(HZ)); | |
1da177e4 | 639 | |
7a343d4c LA |
640 | set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
641 | ||
1da177e4 LT |
642 | return 0; |
643 | } | |
644 | ||
7a343d4c LA |
645 | static void ipoib_pkey_dev_check_presence(struct net_device *dev) |
646 | { | |
647 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
648 | u16 pkey_index = 0; | |
649 | ||
9fdd5e5b | 650 | if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) |
7a343d4c LA |
651 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); |
652 | else | |
653 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
654 | } | |
655 | ||
1da177e4 LT |
656 | int ipoib_ib_dev_up(struct net_device *dev) |
657 | { | |
658 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
659 | ||
7a343d4c LA |
660 | ipoib_pkey_dev_check_presence(dev); |
661 | ||
662 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
663 | ipoib_dbg(priv, "PKEY is not assigned.\n"); | |
664 | return 0; | |
665 | } | |
666 | ||
1da177e4 LT |
667 | set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); |
668 | ||
669 | return ipoib_mcast_start_thread(dev); | |
670 | } | |
671 | ||
0b3ea082 | 672 | int ipoib_ib_dev_down(struct net_device *dev, int flush) |
1da177e4 LT |
673 | { |
674 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
675 | ||
676 | ipoib_dbg(priv, "downing ib_dev\n"); | |
677 | ||
678 | clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
679 | netif_carrier_off(dev); | |
680 | ||
681 | /* Shutdown the P_Key thread if still active */ | |
682 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
95ed644f | 683 | mutex_lock(&pkey_mutex); |
1da177e4 | 684 | set_bit(IPOIB_PKEY_STOP, &priv->flags); |
26bbf13c | 685 | cancel_delayed_work(&priv->pkey_poll_task); |
95ed644f | 686 | mutex_unlock(&pkey_mutex); |
0b3ea082 JM |
687 | if (flush) |
688 | flush_workqueue(ipoib_workqueue); | |
1da177e4 LT |
689 | } |
690 | ||
0b3ea082 | 691 | ipoib_mcast_stop_thread(dev, flush); |
1da177e4 LT |
692 | ipoib_mcast_dev_flush(dev); |
693 | ||
1da177e4 LT |
694 | ipoib_flush_paths(dev); |
695 | ||
696 | return 0; | |
697 | } | |
698 | ||
699 | static int recvs_pending(struct net_device *dev) | |
700 | { | |
701 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
702 | int pending = 0; | |
703 | int i; | |
704 | ||
0f485251 | 705 | for (i = 0; i < ipoib_recvq_size; ++i) |
1da177e4 LT |
706 | if (priv->rx_ring[i].skb) |
707 | ++pending; | |
708 | ||
709 | return pending; | |
710 | } | |
711 | ||
2dfbfc37 MT |
712 | void ipoib_drain_cq(struct net_device *dev) |
713 | { | |
714 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
715 | int i, n; | |
716 | do { | |
717 | n = ib_poll_cq(priv->cq, IPOIB_NUM_WC, priv->ibwc); | |
718 | for (i = 0; i < n; ++i) { | |
ce423ef5 RD |
719 | /* |
720 | * Convert any successful completions to flush | |
721 | * errors to avoid passing packets up the | |
722 | * stack after bringing the device down. | |
723 | */ | |
724 | if (priv->ibwc[i].status == IB_WC_SUCCESS) | |
725 | priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; | |
726 | ||
1b524963 MT |
727 | if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) { |
728 | if (priv->ibwc[i].wr_id & IPOIB_OP_CM) | |
729 | ipoib_cm_handle_rx_wc(dev, priv->ibwc + i); | |
730 | else | |
731 | ipoib_ib_handle_rx_wc(dev, priv->ibwc + i); | |
732 | } else { | |
733 | if (priv->ibwc[i].wr_id & IPOIB_OP_CM) | |
734 | ipoib_cm_handle_tx_wc(dev, priv->ibwc + i); | |
735 | else | |
736 | ipoib_ib_handle_tx_wc(dev, priv->ibwc + i); | |
737 | } | |
2dfbfc37 MT |
738 | } |
739 | } while (n == IPOIB_NUM_WC); | |
740 | } | |
741 | ||
26bbf13c | 742 | int ipoib_ib_dev_stop(struct net_device *dev, int flush) |
1da177e4 LT |
743 | { |
744 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
745 | struct ib_qp_attr qp_attr; | |
1da177e4 | 746 | unsigned long begin; |
1993d683 | 747 | struct ipoib_tx_buf *tx_req; |
2dfbfc37 | 748 | int i; |
1da177e4 | 749 | |
7a343d4c LA |
750 | clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
751 | ||
839fcaba MT |
752 | ipoib_cm_dev_stop(dev); |
753 | ||
3bc12e75 RD |
754 | /* |
755 | * Move our QP to the error state and then reinitialize in | |
756 | * when all work requests have completed or have been flushed. | |
757 | */ | |
1da177e4 | 758 | qp_attr.qp_state = IB_QPS_ERR; |
3bc12e75 | 759 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
1da177e4 LT |
760 | ipoib_warn(priv, "Failed to modify QP to ERROR state\n"); |
761 | ||
762 | /* Wait for all sends and receives to complete */ | |
763 | begin = jiffies; | |
764 | ||
765 | while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) { | |
766 | if (time_after(jiffies, begin + 5 * HZ)) { | |
767 | ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", | |
768 | priv->tx_head - priv->tx_tail, recvs_pending(dev)); | |
769 | ||
770 | /* | |
771 | * assume the HW is wedged and just free up | |
772 | * all our pending work requests. | |
773 | */ | |
2181858b | 774 | while ((int) priv->tx_tail - (int) priv->tx_head < 0) { |
1da177e4 | 775 | tx_req = &priv->tx_ring[priv->tx_tail & |
0f485251 | 776 | (ipoib_sendq_size - 1)]; |
7143740d | 777 | ipoib_dma_unmap_tx(priv->ca, tx_req); |
1da177e4 LT |
778 | dev_kfree_skb_any(tx_req->skb); |
779 | ++priv->tx_tail; | |
1b524963 | 780 | --priv->tx_outstanding; |
1da177e4 LT |
781 | } |
782 | ||
37ccf9df RC |
783 | for (i = 0; i < ipoib_recvq_size; ++i) { |
784 | struct ipoib_rx_buf *rx_req; | |
785 | ||
786 | rx_req = &priv->rx_ring[i]; | |
787 | if (!rx_req->skb) | |
788 | continue; | |
bc7b3a36 SM |
789 | ipoib_ud_dma_unmap_rx(priv, |
790 | priv->rx_ring[i].mapping); | |
37ccf9df RC |
791 | dev_kfree_skb_any(rx_req->skb); |
792 | rx_req->skb = NULL; | |
793 | } | |
1da177e4 LT |
794 | |
795 | goto timeout; | |
796 | } | |
797 | ||
2dfbfc37 | 798 | ipoib_drain_cq(dev); |
8d1cc86a | 799 | |
1da177e4 LT |
800 | msleep(1); |
801 | } | |
802 | ||
803 | ipoib_dbg(priv, "All sends and receives done.\n"); | |
804 | ||
805 | timeout: | |
806 | qp_attr.qp_state = IB_QPS_RESET; | |
3bc12e75 | 807 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
1da177e4 LT |
808 | ipoib_warn(priv, "Failed to modify QP to RESET state\n"); |
809 | ||
810 | /* Wait for all AHs to be reaped */ | |
811 | set_bit(IPOIB_STOP_REAPER, &priv->flags); | |
812 | cancel_delayed_work(&priv->ah_reap_task); | |
26bbf13c YE |
813 | if (flush) |
814 | flush_workqueue(ipoib_workqueue); | |
1da177e4 LT |
815 | |
816 | begin = jiffies; | |
817 | ||
818 | while (!list_empty(&priv->dead_ahs)) { | |
819 | __ipoib_reap_ah(dev); | |
820 | ||
821 | if (time_after(jiffies, begin + HZ)) { | |
822 | ipoib_warn(priv, "timing out; will leak address handles\n"); | |
823 | break; | |
824 | } | |
825 | ||
826 | msleep(1); | |
827 | } | |
828 | ||
8d1cc86a RD |
829 | ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP); |
830 | ||
1da177e4 LT |
831 | return 0; |
832 | } | |
833 | ||
834 | int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
835 | { | |
836 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
837 | ||
838 | priv->ca = ca; | |
839 | priv->port = port; | |
840 | priv->qp = NULL; | |
841 | ||
842 | if (ipoib_transport_dev_init(dev, ca)) { | |
843 | printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); | |
844 | return -ENODEV; | |
845 | } | |
846 | ||
847 | if (dev->flags & IFF_UP) { | |
848 | if (ipoib_ib_dev_open(dev)) { | |
849 | ipoib_transport_dev_cleanup(dev); | |
850 | return -ENODEV; | |
851 | } | |
852 | } | |
853 | ||
854 | return 0; | |
855 | } | |
856 | ||
26bbf13c | 857 | static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, int pkey_event) |
1da177e4 | 858 | { |
26bbf13c | 859 | struct ipoib_dev_priv *cpriv; |
c4028958 | 860 | struct net_device *dev = priv->dev; |
26bbf13c YE |
861 | u16 new_index; |
862 | ||
863 | mutex_lock(&priv->vlan_mutex); | |
1da177e4 | 864 | |
26bbf13c YE |
865 | /* |
866 | * Flush any child interfaces too -- they might be up even if | |
867 | * the parent is down. | |
868 | */ | |
869 | list_for_each_entry(cpriv, &priv->child_intfs, list) | |
870 | __ipoib_ib_dev_flush(cpriv, pkey_event); | |
871 | ||
872 | mutex_unlock(&priv->vlan_mutex); | |
873 | ||
874 | if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) { | |
7a343d4c LA |
875 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); |
876 | return; | |
877 | } | |
878 | ||
879 | if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { | |
880 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); | |
1da177e4 | 881 | return; |
7a343d4c | 882 | } |
1da177e4 | 883 | |
26bbf13c YE |
884 | if (pkey_event) { |
885 | if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) { | |
886 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
887 | ipoib_ib_dev_down(dev, 0); | |
167c4265 | 888 | ipoib_ib_dev_stop(dev, 0); |
9fdd5e5b RD |
889 | if (ipoib_pkey_dev_delay_open(dev)) |
890 | return; | |
26bbf13c | 891 | } |
26bbf13c YE |
892 | |
893 | /* restart QP only if P_Key index is changed */ | |
9fdd5e5b RD |
894 | if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) && |
895 | new_index == priv->pkey_index) { | |
26bbf13c YE |
896 | ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); |
897 | return; | |
898 | } | |
899 | priv->pkey_index = new_index; | |
900 | } | |
901 | ||
1da177e4 LT |
902 | ipoib_dbg(priv, "flushing\n"); |
903 | ||
0b3ea082 | 904 | ipoib_ib_dev_down(dev, 0); |
1da177e4 | 905 | |
26bbf13c YE |
906 | if (pkey_event) { |
907 | ipoib_ib_dev_stop(dev, 0); | |
908 | ipoib_ib_dev_open(dev); | |
909 | } | |
910 | ||
1da177e4 LT |
911 | /* |
912 | * The device could have been brought down between the start and when | |
913 | * we get here, don't bring it back up if it's not configured up | |
914 | */ | |
5ccd0255 | 915 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { |
1da177e4 | 916 | ipoib_ib_dev_up(dev); |
c4028958 | 917 | ipoib_mcast_restart_task(&priv->restart_task); |
5ccd0255 | 918 | } |
26bbf13c | 919 | } |
1da177e4 | 920 | |
26bbf13c YE |
921 | void ipoib_ib_dev_flush(struct work_struct *work) |
922 | { | |
923 | struct ipoib_dev_priv *priv = | |
924 | container_of(work, struct ipoib_dev_priv, flush_task); | |
4f71055a | 925 | |
26bbf13c YE |
926 | ipoib_dbg(priv, "Flushing %s\n", priv->dev->name); |
927 | __ipoib_ib_dev_flush(priv, 0); | |
928 | } | |
4f71055a | 929 | |
26bbf13c YE |
930 | void ipoib_pkey_event(struct work_struct *work) |
931 | { | |
932 | struct ipoib_dev_priv *priv = | |
933 | container_of(work, struct ipoib_dev_priv, pkey_event_task); | |
934 | ||
935 | ipoib_dbg(priv, "Flushing %s and restarting its QP\n", priv->dev->name); | |
936 | __ipoib_ib_dev_flush(priv, 1); | |
1da177e4 LT |
937 | } |
938 | ||
939 | void ipoib_ib_dev_cleanup(struct net_device *dev) | |
940 | { | |
941 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
942 | ||
943 | ipoib_dbg(priv, "cleaning up ib_dev\n"); | |
944 | ||
8d2cae06 | 945 | ipoib_mcast_stop_thread(dev, 1); |
988bd503 | 946 | ipoib_mcast_dev_flush(dev); |
1da177e4 LT |
947 | |
948 | ipoib_transport_dev_cleanup(dev); | |
949 | } | |
950 | ||
951 | /* | |
952 | * Delayed P_Key Assigment Interim Support | |
953 | * | |
954 | * The following is initial implementation of delayed P_Key assigment | |
955 | * mechanism. It is using the same approach implemented for the multicast | |
956 | * group join. The single goal of this implementation is to quickly address | |
957 | * Bug #2507. This implementation will probably be removed when the P_Key | |
958 | * change async notification is available. | |
959 | */ | |
1da177e4 | 960 | |
c4028958 | 961 | void ipoib_pkey_poll(struct work_struct *work) |
1da177e4 | 962 | { |
c4028958 | 963 | struct ipoib_dev_priv *priv = |
26bbf13c | 964 | container_of(work, struct ipoib_dev_priv, pkey_poll_task.work); |
c4028958 | 965 | struct net_device *dev = priv->dev; |
1da177e4 LT |
966 | |
967 | ipoib_pkey_dev_check_presence(dev); | |
968 | ||
969 | if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) | |
970 | ipoib_open(dev); | |
971 | else { | |
95ed644f | 972 | mutex_lock(&pkey_mutex); |
1da177e4 LT |
973 | if (!test_bit(IPOIB_PKEY_STOP, &priv->flags)) |
974 | queue_delayed_work(ipoib_workqueue, | |
26bbf13c | 975 | &priv->pkey_poll_task, |
1da177e4 | 976 | HZ); |
95ed644f | 977 | mutex_unlock(&pkey_mutex); |
1da177e4 LT |
978 | } |
979 | } | |
980 | ||
981 | int ipoib_pkey_dev_delay_open(struct net_device *dev) | |
982 | { | |
983 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
984 | ||
985 | /* Look for the interface pkey value in the IB Port P_Key table and */ | |
986 | /* set the interface pkey assigment flag */ | |
987 | ipoib_pkey_dev_check_presence(dev); | |
988 | ||
989 | /* P_Key value not assigned yet - start polling */ | |
990 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
95ed644f | 991 | mutex_lock(&pkey_mutex); |
1da177e4 LT |
992 | clear_bit(IPOIB_PKEY_STOP, &priv->flags); |
993 | queue_delayed_work(ipoib_workqueue, | |
26bbf13c | 994 | &priv->pkey_poll_task, |
1da177e4 | 995 | HZ); |
95ed644f | 996 | mutex_unlock(&pkey_mutex); |
1da177e4 LT |
997 | return 1; |
998 | } | |
999 | ||
1000 | return 0; | |
1001 | } |