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. | |
1da177e4 LT |
34 | */ |
35 | ||
36 | #include <linux/delay.h> | |
fec14d2f | 37 | #include <linux/moduleparam.h> |
1da177e4 | 38 | #include <linux/dma-mapping.h> |
5a0e3ad6 | 39 | #include <linux/slab.h> |
1da177e4 | 40 | |
40ca1988 EC |
41 | #include <linux/ip.h> |
42 | #include <linux/tcp.h> | |
1da177e4 LT |
43 | |
44 | #include "ipoib.h" | |
45 | ||
46 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA | |
47 | static int data_debug_level; | |
48 | ||
49 | module_param(data_debug_level, int, 0644); | |
50 | MODULE_PARM_DESC(data_debug_level, | |
51 | "Enable data path debug tracing if > 0"); | |
52 | #endif | |
53 | ||
95ed644f | 54 | static DEFINE_MUTEX(pkey_mutex); |
1da177e4 LT |
55 | |
56 | struct ipoib_ah *ipoib_create_ah(struct net_device *dev, | |
57 | struct ib_pd *pd, struct ib_ah_attr *attr) | |
58 | { | |
59 | struct ipoib_ah *ah; | |
3874397c | 60 | struct ib_ah *vah; |
1da177e4 LT |
61 | |
62 | ah = kmalloc(sizeof *ah, GFP_KERNEL); | |
63 | if (!ah) | |
3874397c | 64 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
65 | |
66 | ah->dev = dev; | |
67 | ah->last_send = 0; | |
68 | kref_init(&ah->ref); | |
69 | ||
3874397c MM |
70 | vah = ib_create_ah(pd, attr); |
71 | if (IS_ERR(vah)) { | |
1da177e4 | 72 | kfree(ah); |
3874397c MM |
73 | ah = (struct ipoib_ah *)vah; |
74 | } else { | |
75 | ah->ah = vah; | |
1da177e4 | 76 | ipoib_dbg(netdev_priv(dev), "Created ah %p\n", ah->ah); |
3874397c | 77 | } |
1da177e4 LT |
78 | |
79 | return ah; | |
80 | } | |
81 | ||
82 | void ipoib_free_ah(struct kref *kref) | |
83 | { | |
84 | struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref); | |
85 | struct ipoib_dev_priv *priv = netdev_priv(ah->dev); | |
86 | ||
87 | unsigned long flags; | |
88 | ||
31c02e21 RD |
89 | spin_lock_irqsave(&priv->lock, flags); |
90 | list_add_tail(&ah->list, &priv->dead_ahs); | |
91 | spin_unlock_irqrestore(&priv->lock, flags); | |
1da177e4 LT |
92 | } |
93 | ||
bc7b3a36 SM |
94 | static void ipoib_ud_dma_unmap_rx(struct ipoib_dev_priv *priv, |
95 | u64 mapping[IPOIB_UD_RX_SG]) | |
96 | { | |
a44878d1 ES |
97 | ib_dma_unmap_single(priv->ca, mapping[0], |
98 | IPOIB_UD_BUF_SIZE(priv->max_ib_mtu), | |
99 | DMA_FROM_DEVICE); | |
bc7b3a36 SM |
100 | } |
101 | ||
1993d683 | 102 | static int ipoib_ib_post_receive(struct net_device *dev, int id) |
1da177e4 | 103 | { |
1993d683 | 104 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
1da177e4 | 105 | struct ib_recv_wr *bad_wr; |
1993d683 RD |
106 | int ret; |
107 | ||
bc7b3a36 SM |
108 | priv->rx_wr.wr_id = id | IPOIB_OP_RECV; |
109 | priv->rx_sge[0].addr = priv->rx_ring[id].mapping[0]; | |
110 | priv->rx_sge[1].addr = priv->rx_ring[id].mapping[1]; | |
1993d683 | 111 | |
1993d683 | 112 | |
bc7b3a36 | 113 | ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr); |
1993d683 RD |
114 | if (unlikely(ret)) { |
115 | ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret); | |
bc7b3a36 | 116 | ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[id].mapping); |
1993d683 RD |
117 | dev_kfree_skb_any(priv->rx_ring[id].skb); |
118 | priv->rx_ring[id].skb = NULL; | |
119 | } | |
1da177e4 | 120 | |
1993d683 | 121 | return ret; |
1da177e4 LT |
122 | } |
123 | ||
bc7b3a36 | 124 | static struct sk_buff *ipoib_alloc_rx_skb(struct net_device *dev, int id) |
1da177e4 LT |
125 | { |
126 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
127 | struct sk_buff *skb; | |
bc7b3a36 SM |
128 | int buf_size; |
129 | u64 *mapping; | |
1da177e4 | 130 | |
a44878d1 | 131 | buf_size = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu); |
bc7b3a36 | 132 | |
a44878d1 | 133 | skb = dev_alloc_skb(buf_size + IPOIB_ENCAP_LEN); |
bc7b3a36 SM |
134 | if (unlikely(!skb)) |
135 | return NULL; | |
1993d683 RD |
136 | |
137 | /* | |
138 | * IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte | |
139 | * header. So we need 4 more bytes to get to 48 and align the | |
140 | * IP header to a multiple of 16. | |
141 | */ | |
142 | skb_reserve(skb, 4); | |
143 | ||
bc7b3a36 SM |
144 | mapping = priv->rx_ring[id].mapping; |
145 | mapping[0] = ib_dma_map_single(priv->ca, skb->data, buf_size, | |
146 | DMA_FROM_DEVICE); | |
147 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0]))) | |
148 | goto error; | |
149 | ||
bc7b3a36 SM |
150 | priv->rx_ring[id].skb = skb; |
151 | return skb; | |
bc7b3a36 SM |
152 | error: |
153 | dev_kfree_skb_any(skb); | |
154 | return NULL; | |
1da177e4 LT |
155 | } |
156 | ||
157 | static int ipoib_ib_post_receives(struct net_device *dev) | |
158 | { | |
159 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
160 | int i; | |
161 | ||
0f485251 | 162 | for (i = 0; i < ipoib_recvq_size; ++i) { |
bc7b3a36 | 163 | if (!ipoib_alloc_rx_skb(dev, i)) { |
1993d683 RD |
164 | ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); |
165 | return -ENOMEM; | |
166 | } | |
1da177e4 LT |
167 | if (ipoib_ib_post_receive(dev, i)) { |
168 | ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i); | |
169 | return -EIO; | |
170 | } | |
171 | } | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
2439a6e6 | 176 | static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) |
1da177e4 LT |
177 | { |
178 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
2439a6e6 RD |
179 | unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV; |
180 | struct sk_buff *skb; | |
bc7b3a36 | 181 | u64 mapping[IPOIB_UD_RX_SG]; |
fed1db33 | 182 | union ib_gid *dgid; |
1da177e4 | 183 | |
a89875fc RD |
184 | ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n", |
185 | wr_id, wc->status); | |
1da177e4 | 186 | |
2439a6e6 RD |
187 | if (unlikely(wr_id >= ipoib_recvq_size)) { |
188 | ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n", | |
189 | wr_id, ipoib_recvq_size); | |
190 | return; | |
191 | } | |
192 | ||
193 | skb = priv->rx_ring[wr_id].skb; | |
2439a6e6 RD |
194 | |
195 | if (unlikely(wc->status != IB_WC_SUCCESS)) { | |
196 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
197 | ipoib_warn(priv, "failed recv event " | |
198 | "(status=%d, wrid=%d vend_err %x)\n", | |
199 | wc->status, wr_id, wc->vendor_err); | |
bc7b3a36 | 200 | ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[wr_id].mapping); |
2439a6e6 RD |
201 | dev_kfree_skb_any(skb); |
202 | priv->rx_ring[wr_id].skb = NULL; | |
203 | return; | |
204 | } | |
1da177e4 | 205 | |
1b844afe RD |
206 | /* |
207 | * Drop packets that this interface sent, ie multicast packets | |
208 | * that the HCA has replicated. | |
209 | */ | |
210 | if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num) | |
211 | goto repost; | |
212 | ||
bc7b3a36 SM |
213 | memcpy(mapping, priv->rx_ring[wr_id].mapping, |
214 | IPOIB_UD_RX_SG * sizeof *mapping); | |
215 | ||
2439a6e6 RD |
216 | /* |
217 | * If we can't allocate a new RX buffer, dump | |
218 | * this packet and reuse the old buffer. | |
219 | */ | |
bc7b3a36 | 220 | if (unlikely(!ipoib_alloc_rx_skb(dev, wr_id))) { |
de903512 | 221 | ++dev->stats.rx_dropped; |
2439a6e6 RD |
222 | goto repost; |
223 | } | |
224 | ||
225 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", | |
226 | wc->byte_len, wc->slid); | |
227 | ||
bc7b3a36 | 228 | ipoib_ud_dma_unmap_rx(priv, mapping); |
a44878d1 ES |
229 | |
230 | skb_put(skb, wc->byte_len); | |
2439a6e6 | 231 | |
fed1db33 CL |
232 | /* First byte of dgid signals multicast when 0xff */ |
233 | dgid = &((struct ib_grh *)skb->data)->dgid; | |
234 | ||
235 | if (!(wc->wc_flags & IB_WC_GRH) || dgid->raw[0] != 0xff) | |
236 | skb->pkt_type = PACKET_HOST; | |
237 | else if (memcmp(dgid, dev->broadcast + 4, sizeof(union ib_gid)) == 0) | |
238 | skb->pkt_type = PACKET_BROADCAST; | |
239 | else | |
240 | skb->pkt_type = PACKET_MULTICAST; | |
241 | ||
2439a6e6 RD |
242 | skb_pull(skb, IB_GRH_BYTES); |
243 | ||
1b844afe RD |
244 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; |
245 | skb_reset_mac_header(skb); | |
246 | skb_pull(skb, IPOIB_ENCAP_LEN); | |
247 | ||
a44878d1 ES |
248 | skb->truesize = SKB_TRUESIZE(skb->len); |
249 | ||
de903512 RD |
250 | ++dev->stats.rx_packets; |
251 | dev->stats.rx_bytes += skb->len; | |
1b844afe RD |
252 | |
253 | skb->dev = dev; | |
d927d505 OG |
254 | if ((dev->features & NETIF_F_RXCSUM) && |
255 | likely(wc->wc_flags & IB_WC_IP_CSUM_OK)) | |
6046136c EC |
256 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
257 | ||
8ae31e5b | 258 | napi_gro_receive(&priv->napi, skb); |
1da177e4 | 259 | |
2439a6e6 RD |
260 | repost: |
261 | if (unlikely(ipoib_ib_post_receive(dev, wr_id))) | |
262 | ipoib_warn(priv, "ipoib_ib_post_receive failed " | |
263 | "for buf %d\n", wr_id); | |
264 | } | |
1da177e4 | 265 | |
7143740d EC |
266 | static int ipoib_dma_map_tx(struct ib_device *ca, |
267 | struct ipoib_tx_buf *tx_req) | |
268 | { | |
269 | struct sk_buff *skb = tx_req->skb; | |
270 | u64 *mapping = tx_req->mapping; | |
271 | int i; | |
40ca1988 | 272 | int off; |
7143740d | 273 | |
40ca1988 EC |
274 | if (skb_headlen(skb)) { |
275 | mapping[0] = ib_dma_map_single(ca, skb->data, skb_headlen(skb), | |
276 | DMA_TO_DEVICE); | |
277 | if (unlikely(ib_dma_mapping_error(ca, mapping[0]))) | |
278 | return -EIO; | |
279 | ||
280 | off = 1; | |
281 | } else | |
282 | off = 0; | |
7143740d EC |
283 | |
284 | for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { | |
9e903e08 | 285 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
5581be3b IC |
286 | mapping[i + off] = ib_dma_map_page(ca, |
287 | skb_frag_page(frag), | |
9e903e08 | 288 | frag->page_offset, skb_frag_size(frag), |
7143740d | 289 | DMA_TO_DEVICE); |
40ca1988 | 290 | if (unlikely(ib_dma_mapping_error(ca, mapping[i + off]))) |
7143740d EC |
291 | goto partial_error; |
292 | } | |
293 | return 0; | |
294 | ||
295 | partial_error: | |
7143740d | 296 | for (; i > 0; --i) { |
9e903e08 ED |
297 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1]; |
298 | ||
299 | ib_dma_unmap_page(ca, mapping[i - !off], skb_frag_size(frag), DMA_TO_DEVICE); | |
7143740d | 300 | } |
40ca1988 EC |
301 | |
302 | if (off) | |
303 | ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE); | |
304 | ||
7143740d EC |
305 | return -EIO; |
306 | } | |
307 | ||
308 | static void ipoib_dma_unmap_tx(struct ib_device *ca, | |
309 | struct ipoib_tx_buf *tx_req) | |
310 | { | |
311 | struct sk_buff *skb = tx_req->skb; | |
312 | u64 *mapping = tx_req->mapping; | |
313 | int i; | |
40ca1988 | 314 | int off; |
7143740d | 315 | |
40ca1988 EC |
316 | if (skb_headlen(skb)) { |
317 | ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE); | |
318 | off = 1; | |
319 | } else | |
320 | off = 0; | |
7143740d EC |
321 | |
322 | for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { | |
9e903e08 ED |
323 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
324 | ||
325 | ib_dma_unmap_page(ca, mapping[i + off], skb_frag_size(frag), | |
7143740d EC |
326 | DMA_TO_DEVICE); |
327 | } | |
328 | } | |
329 | ||
2439a6e6 RD |
330 | static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc) |
331 | { | |
332 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
333 | unsigned int wr_id = wc->wr_id; | |
334 | struct ipoib_tx_buf *tx_req; | |
1da177e4 | 335 | |
a89875fc RD |
336 | ipoib_dbg_data(priv, "send completion: id %d, status: %d\n", |
337 | wr_id, wc->status); | |
1da177e4 | 338 | |
2439a6e6 RD |
339 | if (unlikely(wr_id >= ipoib_sendq_size)) { |
340 | ipoib_warn(priv, "send completion event with wrid %d (> %d)\n", | |
341 | wr_id, ipoib_sendq_size); | |
342 | return; | |
1da177e4 | 343 | } |
2439a6e6 RD |
344 | |
345 | tx_req = &priv->tx_ring[wr_id]; | |
346 | ||
7143740d | 347 | ipoib_dma_unmap_tx(priv->ca, tx_req); |
2439a6e6 | 348 | |
de903512 RD |
349 | ++dev->stats.tx_packets; |
350 | dev->stats.tx_bytes += tx_req->skb->len; | |
2439a6e6 RD |
351 | |
352 | dev_kfree_skb_any(tx_req->skb); | |
353 | ||
2439a6e6 | 354 | ++priv->tx_tail; |
1b524963 MT |
355 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
356 | netif_queue_stopped(dev) && | |
357 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
2439a6e6 | 358 | netif_wake_queue(dev); |
2439a6e6 RD |
359 | |
360 | if (wc->status != IB_WC_SUCCESS && | |
361 | wc->status != IB_WC_WR_FLUSH_ERR) | |
362 | ipoib_warn(priv, "failed send event " | |
363 | "(status=%d, wrid=%d vend_err %x)\n", | |
364 | wc->status, wr_id, wc->vendor_err); | |
365 | } | |
366 | ||
f56bcd80 EC |
367 | static int poll_tx(struct ipoib_dev_priv *priv) |
368 | { | |
369 | int n, i; | |
370 | ||
371 | n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc); | |
372 | for (i = 0; i < n; ++i) | |
373 | ipoib_ib_handle_tx_wc(priv->dev, priv->send_wc + i); | |
374 | ||
375 | return n == MAX_SEND_CQE; | |
376 | } | |
377 | ||
bea3348e | 378 | int ipoib_poll(struct napi_struct *napi, int budget) |
2439a6e6 | 379 | { |
bea3348e SH |
380 | struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi); |
381 | struct net_device *dev = priv->dev; | |
8d1cc86a RD |
382 | int done; |
383 | int t; | |
8d1cc86a RD |
384 | int n, i; |
385 | ||
386 | done = 0; | |
8d1cc86a | 387 | |
bea3348e SH |
388 | poll_more: |
389 | while (done < budget) { | |
390 | int max = (budget - done); | |
391 | ||
8d1cc86a | 392 | t = min(IPOIB_NUM_WC, max); |
f56bcd80 | 393 | n = ib_poll_cq(priv->recv_cq, t, priv->ibwc); |
8d1cc86a | 394 | |
bea3348e | 395 | for (i = 0; i < n; i++) { |
8d1cc86a RD |
396 | struct ib_wc *wc = priv->ibwc + i; |
397 | ||
1b524963 | 398 | if (wc->wr_id & IPOIB_OP_RECV) { |
8d1cc86a | 399 | ++done; |
1b524963 MT |
400 | if (wc->wr_id & IPOIB_OP_CM) |
401 | ipoib_cm_handle_rx_wc(dev, wc); | |
402 | else | |
403 | ipoib_ib_handle_rx_wc(dev, wc); | |
f56bcd80 EC |
404 | } else |
405 | ipoib_cm_handle_tx_wc(priv->dev, wc); | |
8d1cc86a RD |
406 | } |
407 | ||
bea3348e | 408 | if (n != t) |
8d1cc86a | 409 | break; |
8d1cc86a RD |
410 | } |
411 | ||
bea3348e | 412 | if (done < budget) { |
288379f0 | 413 | napi_complete(napi); |
f56bcd80 | 414 | if (unlikely(ib_req_notify_cq(priv->recv_cq, |
8d1cc86a RD |
415 | IB_CQ_NEXT_COMP | |
416 | IB_CQ_REPORT_MISSED_EVENTS)) && | |
288379f0 | 417 | napi_reschedule(napi)) |
bea3348e | 418 | goto poll_more; |
8d1cc86a RD |
419 | } |
420 | ||
bea3348e | 421 | return done; |
1da177e4 LT |
422 | } |
423 | ||
424 | void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) | |
425 | { | |
bea3348e SH |
426 | struct net_device *dev = dev_ptr; |
427 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
428 | ||
288379f0 | 429 | napi_schedule(&priv->napi); |
1da177e4 LT |
430 | } |
431 | ||
57ce41d1 EC |
432 | static void drain_tx_cq(struct net_device *dev) |
433 | { | |
434 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
57ce41d1 | 435 | |
943c246e | 436 | netif_tx_lock(dev); |
57ce41d1 EC |
437 | while (poll_tx(priv)) |
438 | ; /* nothing */ | |
439 | ||
440 | if (netif_queue_stopped(dev)) | |
441 | mod_timer(&priv->poll_timer, jiffies + 1); | |
442 | ||
943c246e | 443 | netif_tx_unlock(dev); |
57ce41d1 EC |
444 | } |
445 | ||
446 | void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr) | |
447 | { | |
943c246e RD |
448 | struct ipoib_dev_priv *priv = netdev_priv(dev_ptr); |
449 | ||
450 | mod_timer(&priv->poll_timer, jiffies); | |
57ce41d1 EC |
451 | } |
452 | ||
1da177e4 LT |
453 | static inline int post_send(struct ipoib_dev_priv *priv, |
454 | unsigned int wr_id, | |
455 | struct ib_ah *address, u32 qpn, | |
40ca1988 EC |
456 | struct ipoib_tx_buf *tx_req, |
457 | void *head, int hlen) | |
1da177e4 LT |
458 | { |
459 | struct ib_send_wr *bad_wr; | |
40ca1988 EC |
460 | int i, off; |
461 | struct sk_buff *skb = tx_req->skb; | |
462 | skb_frag_t *frags = skb_shinfo(skb)->frags; | |
463 | int nr_frags = skb_shinfo(skb)->nr_frags; | |
464 | u64 *mapping = tx_req->mapping; | |
465 | ||
466 | if (skb_headlen(skb)) { | |
467 | priv->tx_sge[0].addr = mapping[0]; | |
468 | priv->tx_sge[0].length = skb_headlen(skb); | |
469 | off = 1; | |
470 | } else | |
471 | off = 0; | |
1da177e4 | 472 | |
7143740d | 473 | for (i = 0; i < nr_frags; ++i) { |
40ca1988 | 474 | priv->tx_sge[i + off].addr = mapping[i + off]; |
9e903e08 | 475 | priv->tx_sge[i + off].length = skb_frag_size(&frags[i]); |
7143740d | 476 | } |
40ca1988 | 477 | priv->tx_wr.num_sge = nr_frags + off; |
7143740d EC |
478 | priv->tx_wr.wr_id = wr_id; |
479 | priv->tx_wr.wr.ud.remote_qpn = qpn; | |
480 | priv->tx_wr.wr.ud.ah = address; | |
1da177e4 | 481 | |
40ca1988 EC |
482 | if (head) { |
483 | priv->tx_wr.wr.ud.mss = skb_shinfo(skb)->gso_size; | |
484 | priv->tx_wr.wr.ud.header = head; | |
485 | priv->tx_wr.wr.ud.hlen = hlen; | |
486 | priv->tx_wr.opcode = IB_WR_LSO; | |
487 | } else | |
488 | priv->tx_wr.opcode = IB_WR_SEND; | |
489 | ||
1da177e4 LT |
490 | return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr); |
491 | } | |
492 | ||
493 | void ipoib_send(struct net_device *dev, struct sk_buff *skb, | |
494 | struct ipoib_ah *address, u32 qpn) | |
495 | { | |
496 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1993d683 | 497 | struct ipoib_tx_buf *tx_req; |
a48f509b | 498 | int hlen, rc; |
40ca1988 EC |
499 | void *phead; |
500 | ||
501 | if (skb_is_gso(skb)) { | |
502 | hlen = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
503 | phead = skb->data; | |
504 | if (unlikely(!skb_pull(skb, hlen))) { | |
505 | ipoib_warn(priv, "linear data too small\n"); | |
506 | ++dev->stats.tx_dropped; | |
507 | ++dev->stats.tx_errors; | |
508 | dev_kfree_skb_any(skb); | |
509 | return; | |
510 | } | |
511 | } else { | |
512 | if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) { | |
513 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", | |
514 | skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN); | |
515 | ++dev->stats.tx_dropped; | |
516 | ++dev->stats.tx_errors; | |
517 | ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu); | |
518 | return; | |
519 | } | |
520 | phead = NULL; | |
521 | hlen = 0; | |
1da177e4 LT |
522 | } |
523 | ||
524 | ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n", | |
525 | skb->len, address, qpn); | |
526 | ||
527 | /* | |
528 | * We put the skb into the tx_ring _before_ we call post_send() | |
529 | * because it's entirely possible that the completion handler will | |
530 | * run before we execute anything after the post_send(). That | |
531 | * means we have to make sure everything is properly recorded and | |
532 | * our state is consistent before we call post_send(). | |
533 | */ | |
0f485251 | 534 | tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)]; |
1da177e4 | 535 | tx_req->skb = skb; |
7143740d | 536 | if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) { |
de903512 | 537 | ++dev->stats.tx_errors; |
73fbe8be RD |
538 | dev_kfree_skb_any(skb); |
539 | return; | |
540 | } | |
1da177e4 | 541 | |
6046136c EC |
542 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
543 | priv->tx_wr.send_flags |= IB_SEND_IP_CSUM; | |
544 | else | |
545 | priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM; | |
546 | ||
57ce41d1 EC |
547 | if (++priv->tx_outstanding == ipoib_sendq_size) { |
548 | ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); | |
549 | if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP)) | |
550 | ipoib_warn(priv, "request notify on send CQ failed\n"); | |
551 | netif_stop_queue(dev); | |
552 | } | |
553 | ||
7e5a90c2 SP |
554 | skb_orphan(skb); |
555 | skb_dst_drop(skb); | |
556 | ||
a48f509b OG |
557 | rc = post_send(priv, priv->tx_head & (ipoib_sendq_size - 1), |
558 | address->ah, qpn, tx_req, phead, hlen); | |
559 | if (unlikely(rc)) { | |
560 | ipoib_warn(priv, "post_send failed, error %d\n", rc); | |
de903512 | 561 | ++dev->stats.tx_errors; |
57ce41d1 | 562 | --priv->tx_outstanding; |
7143740d | 563 | ipoib_dma_unmap_tx(priv->ca, tx_req); |
1da177e4 | 564 | dev_kfree_skb_any(skb); |
57ce41d1 EC |
565 | if (netif_queue_stopped(dev)) |
566 | netif_wake_queue(dev); | |
1da177e4 LT |
567 | } else { |
568 | dev->trans_start = jiffies; | |
569 | ||
570 | address->last_send = priv->tx_head; | |
571 | ++priv->tx_head; | |
1da177e4 | 572 | } |
f56bcd80 EC |
573 | |
574 | if (unlikely(priv->tx_outstanding > MAX_SEND_CQE)) | |
57ce41d1 EC |
575 | while (poll_tx(priv)) |
576 | ; /* nothing */ | |
1da177e4 LT |
577 | } |
578 | ||
579 | static void __ipoib_reap_ah(struct net_device *dev) | |
580 | { | |
581 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
582 | struct ipoib_ah *ah, *tah; | |
583 | LIST_HEAD(remove_list); | |
943c246e RD |
584 | unsigned long flags; |
585 | ||
586 | netif_tx_lock_bh(dev); | |
587 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 588 | |
1da177e4 | 589 | list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) |
2181858b | 590 | if ((int) priv->tx_tail - (int) ah->last_send >= 0) { |
1da177e4 | 591 | list_del(&ah->list); |
31c02e21 RD |
592 | ib_destroy_ah(ah->ah); |
593 | kfree(ah); | |
1da177e4 | 594 | } |
943c246e RD |
595 | |
596 | spin_unlock_irqrestore(&priv->lock, flags); | |
597 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
598 | } |
599 | ||
c4028958 | 600 | void ipoib_reap_ah(struct work_struct *work) |
1da177e4 | 601 | { |
c4028958 DH |
602 | struct ipoib_dev_priv *priv = |
603 | container_of(work, struct ipoib_dev_priv, ah_reap_task.work); | |
604 | struct net_device *dev = priv->dev; | |
1da177e4 LT |
605 | |
606 | __ipoib_reap_ah(dev); | |
607 | ||
608 | if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) | |
0b39578b | 609 | queue_delayed_work(priv->wq, &priv->ah_reap_task, |
69fc507a | 610 | round_jiffies_relative(HZ)); |
1da177e4 LT |
611 | } |
612 | ||
efc82eee | 613 | static void ipoib_flush_ah(struct net_device *dev) |
e135106f DL |
614 | { |
615 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
616 | ||
617 | cancel_delayed_work(&priv->ah_reap_task); | |
efc82eee | 618 | flush_workqueue(priv->wq); |
e135106f DL |
619 | ipoib_reap_ah(&priv->ah_reap_task.work); |
620 | } | |
621 | ||
efc82eee | 622 | static void ipoib_stop_ah(struct net_device *dev) |
e135106f DL |
623 | { |
624 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
625 | ||
626 | set_bit(IPOIB_STOP_REAPER, &priv->flags); | |
efc82eee | 627 | ipoib_flush_ah(dev); |
e135106f DL |
628 | } |
629 | ||
57ce41d1 EC |
630 | static void ipoib_ib_tx_timer_func(unsigned long ctx) |
631 | { | |
632 | drain_tx_cq((struct net_device *)ctx); | |
633 | } | |
634 | ||
efc82eee | 635 | int ipoib_ib_dev_open(struct net_device *dev) |
1da177e4 LT |
636 | { |
637 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
638 | int ret; | |
639 | ||
dd57c930 AE |
640 | ipoib_pkey_dev_check_presence(dev); |
641 | ||
642 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
643 | ipoib_warn(priv, "P_Key 0x%04x is %s\n", priv->pkey, | |
644 | (!(priv->pkey & 0x7fff) ? "Invalid" : "not found")); | |
26bbf13c YE |
645 | return -1; |
646 | } | |
26bbf13c | 647 | |
5b6810e0 | 648 | ret = ipoib_init_qp(dev); |
1da177e4 | 649 | if (ret) { |
5b6810e0 | 650 | ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); |
1da177e4 LT |
651 | return -1; |
652 | } | |
653 | ||
654 | ret = ipoib_ib_post_receives(dev); | |
655 | if (ret) { | |
656 | ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); | |
c2bb5628 | 657 | goto dev_stop; |
1da177e4 LT |
658 | } |
659 | ||
839fcaba MT |
660 | ret = ipoib_cm_dev_open(dev); |
661 | if (ret) { | |
24bd1e4e | 662 | ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret); |
c2bb5628 | 663 | goto dev_stop; |
839fcaba MT |
664 | } |
665 | ||
1da177e4 | 666 | clear_bit(IPOIB_STOP_REAPER, &priv->flags); |
0b39578b | 667 | queue_delayed_work(priv->wq, &priv->ah_reap_task, |
69fc507a | 668 | round_jiffies_relative(HZ)); |
1da177e4 | 669 | |
e028cc55 YE |
670 | if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
671 | napi_enable(&priv->napi); | |
7a343d4c | 672 | |
1da177e4 | 673 | return 0; |
c2bb5628 ES |
674 | dev_stop: |
675 | if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) | |
676 | napi_enable(&priv->napi); | |
efc82eee | 677 | ipoib_ib_dev_stop(dev); |
c2bb5628 | 678 | return -1; |
1da177e4 LT |
679 | } |
680 | ||
db84f880 | 681 | void ipoib_pkey_dev_check_presence(struct net_device *dev) |
7a343d4c LA |
682 | { |
683 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
7a343d4c | 684 | |
dd57c930 AE |
685 | if (!(priv->pkey & 0x7fff) || |
686 | ib_find_pkey(priv->ca, priv->port, priv->pkey, | |
687 | &priv->pkey_index)) | |
7a343d4c LA |
688 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); |
689 | else | |
690 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
691 | } | |
692 | ||
1da177e4 LT |
693 | int ipoib_ib_dev_up(struct net_device *dev) |
694 | { | |
695 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
696 | ||
7a343d4c LA |
697 | ipoib_pkey_dev_check_presence(dev); |
698 | ||
699 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
700 | ipoib_dbg(priv, "PKEY is not assigned.\n"); | |
701 | return 0; | |
702 | } | |
703 | ||
1da177e4 LT |
704 | set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); |
705 | ||
706 | return ipoib_mcast_start_thread(dev); | |
707 | } | |
708 | ||
efc82eee | 709 | int ipoib_ib_dev_down(struct net_device *dev) |
1da177e4 LT |
710 | { |
711 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
712 | ||
713 | ipoib_dbg(priv, "downing ib_dev\n"); | |
714 | ||
715 | clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
716 | netif_carrier_off(dev); | |
717 | ||
efc82eee | 718 | ipoib_mcast_stop_thread(dev); |
1da177e4 LT |
719 | ipoib_mcast_dev_flush(dev); |
720 | ||
1da177e4 LT |
721 | ipoib_flush_paths(dev); |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
726 | static int recvs_pending(struct net_device *dev) | |
727 | { | |
728 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
729 | int pending = 0; | |
730 | int i; | |
731 | ||
0f485251 | 732 | for (i = 0; i < ipoib_recvq_size; ++i) |
1da177e4 LT |
733 | if (priv->rx_ring[i].skb) |
734 | ++pending; | |
735 | ||
736 | return pending; | |
737 | } | |
738 | ||
2dfbfc37 MT |
739 | void ipoib_drain_cq(struct net_device *dev) |
740 | { | |
741 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
742 | int i, n; | |
943c246e RD |
743 | |
744 | /* | |
745 | * We call completion handling routines that expect to be | |
746 | * called from the BH-disabled NAPI poll context, so disable | |
747 | * BHs here too. | |
748 | */ | |
749 | local_bh_disable(); | |
750 | ||
2dfbfc37 | 751 | do { |
f56bcd80 | 752 | n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); |
2dfbfc37 | 753 | for (i = 0; i < n; ++i) { |
ce423ef5 RD |
754 | /* |
755 | * Convert any successful completions to flush | |
756 | * errors to avoid passing packets up the | |
757 | * stack after bringing the device down. | |
758 | */ | |
759 | if (priv->ibwc[i].status == IB_WC_SUCCESS) | |
760 | priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; | |
761 | ||
1b524963 MT |
762 | if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) { |
763 | if (priv->ibwc[i].wr_id & IPOIB_OP_CM) | |
764 | ipoib_cm_handle_rx_wc(dev, priv->ibwc + i); | |
765 | else | |
766 | ipoib_ib_handle_rx_wc(dev, priv->ibwc + i); | |
f56bcd80 EC |
767 | } else |
768 | ipoib_cm_handle_tx_wc(dev, priv->ibwc + i); | |
2dfbfc37 MT |
769 | } |
770 | } while (n == IPOIB_NUM_WC); | |
f56bcd80 EC |
771 | |
772 | while (poll_tx(priv)) | |
773 | ; /* nothing */ | |
943c246e RD |
774 | |
775 | local_bh_enable(); | |
2dfbfc37 MT |
776 | } |
777 | ||
efc82eee | 778 | int ipoib_ib_dev_stop(struct net_device *dev) |
1da177e4 LT |
779 | { |
780 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
781 | struct ib_qp_attr qp_attr; | |
1da177e4 | 782 | unsigned long begin; |
1993d683 | 783 | struct ipoib_tx_buf *tx_req; |
2dfbfc37 | 784 | int i; |
1da177e4 | 785 | |
e028cc55 YE |
786 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
787 | napi_disable(&priv->napi); | |
7a343d4c | 788 | |
839fcaba MT |
789 | ipoib_cm_dev_stop(dev); |
790 | ||
3bc12e75 RD |
791 | /* |
792 | * Move our QP to the error state and then reinitialize in | |
793 | * when all work requests have completed or have been flushed. | |
794 | */ | |
1da177e4 | 795 | qp_attr.qp_state = IB_QPS_ERR; |
3bc12e75 | 796 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
1da177e4 LT |
797 | ipoib_warn(priv, "Failed to modify QP to ERROR state\n"); |
798 | ||
799 | /* Wait for all sends and receives to complete */ | |
800 | begin = jiffies; | |
801 | ||
802 | while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) { | |
803 | if (time_after(jiffies, begin + 5 * HZ)) { | |
804 | ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", | |
805 | priv->tx_head - priv->tx_tail, recvs_pending(dev)); | |
806 | ||
807 | /* | |
808 | * assume the HW is wedged and just free up | |
809 | * all our pending work requests. | |
810 | */ | |
2181858b | 811 | while ((int) priv->tx_tail - (int) priv->tx_head < 0) { |
1da177e4 | 812 | tx_req = &priv->tx_ring[priv->tx_tail & |
0f485251 | 813 | (ipoib_sendq_size - 1)]; |
7143740d | 814 | ipoib_dma_unmap_tx(priv->ca, tx_req); |
1da177e4 LT |
815 | dev_kfree_skb_any(tx_req->skb); |
816 | ++priv->tx_tail; | |
1b524963 | 817 | --priv->tx_outstanding; |
1da177e4 LT |
818 | } |
819 | ||
37ccf9df RC |
820 | for (i = 0; i < ipoib_recvq_size; ++i) { |
821 | struct ipoib_rx_buf *rx_req; | |
822 | ||
823 | rx_req = &priv->rx_ring[i]; | |
824 | if (!rx_req->skb) | |
825 | continue; | |
bc7b3a36 SM |
826 | ipoib_ud_dma_unmap_rx(priv, |
827 | priv->rx_ring[i].mapping); | |
37ccf9df RC |
828 | dev_kfree_skb_any(rx_req->skb); |
829 | rx_req->skb = NULL; | |
830 | } | |
1da177e4 LT |
831 | |
832 | goto timeout; | |
833 | } | |
834 | ||
2dfbfc37 | 835 | ipoib_drain_cq(dev); |
8d1cc86a | 836 | |
1da177e4 LT |
837 | msleep(1); |
838 | } | |
839 | ||
840 | ipoib_dbg(priv, "All sends and receives done.\n"); | |
841 | ||
842 | timeout: | |
57ce41d1 | 843 | del_timer_sync(&priv->poll_timer); |
1da177e4 | 844 | qp_attr.qp_state = IB_QPS_RESET; |
3bc12e75 | 845 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
1da177e4 LT |
846 | ipoib_warn(priv, "Failed to modify QP to RESET state\n"); |
847 | ||
efc82eee | 848 | ipoib_flush_ah(dev); |
1da177e4 | 849 | |
f56bcd80 | 850 | ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP); |
8d1cc86a | 851 | |
1da177e4 LT |
852 | return 0; |
853 | } | |
854 | ||
855 | int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
856 | { | |
857 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
858 | ||
859 | priv->ca = ca; | |
860 | priv->port = port; | |
861 | priv->qp = NULL; | |
862 | ||
863 | if (ipoib_transport_dev_init(dev, ca)) { | |
864 | printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); | |
865 | return -ENODEV; | |
866 | } | |
867 | ||
2767840a RD |
868 | setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func, |
869 | (unsigned long) dev); | |
870 | ||
1da177e4 | 871 | if (dev->flags & IFF_UP) { |
efc82eee | 872 | if (ipoib_ib_dev_open(dev)) { |
1da177e4 LT |
873 | ipoib_transport_dev_cleanup(dev); |
874 | return -ENODEV; | |
875 | } | |
876 | } | |
877 | ||
878 | return 0; | |
879 | } | |
880 | ||
c2904141 ES |
881 | /* |
882 | * Takes whatever value which is in pkey index 0 and updates priv->pkey | |
883 | * returns 0 if the pkey value was changed. | |
884 | */ | |
885 | static inline int update_parent_pkey(struct ipoib_dev_priv *priv) | |
886 | { | |
887 | int result; | |
888 | u16 prev_pkey; | |
889 | ||
890 | prev_pkey = priv->pkey; | |
891 | result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey); | |
892 | if (result) { | |
893 | ipoib_warn(priv, "ib_query_pkey port %d failed (ret = %d)\n", | |
894 | priv->port, result); | |
895 | return result; | |
896 | } | |
897 | ||
898 | priv->pkey |= 0x8000; | |
899 | ||
900 | if (prev_pkey != priv->pkey) { | |
901 | ipoib_dbg(priv, "pkey changed from 0x%x to 0x%x\n", | |
902 | prev_pkey, priv->pkey); | |
903 | /* | |
904 | * Update the pkey in the broadcast address, while making sure to set | |
905 | * the full membership bit, so that we join the right broadcast group. | |
906 | */ | |
907 | priv->dev->broadcast[8] = priv->pkey >> 8; | |
908 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
909 | return 0; | |
910 | } | |
911 | ||
912 | return 1; | |
913 | } | |
dd57c930 AE |
914 | /* |
915 | * returns 0 if pkey value was found in a different slot. | |
916 | */ | |
917 | static inline int update_child_pkey(struct ipoib_dev_priv *priv) | |
918 | { | |
919 | u16 old_index = priv->pkey_index; | |
920 | ||
921 | priv->pkey_index = 0; | |
922 | ipoib_pkey_dev_check_presence(priv->dev); | |
923 | ||
924 | if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) && | |
925 | (old_index == priv->pkey_index)) | |
926 | return 1; | |
927 | return 0; | |
928 | } | |
c2904141 | 929 | |
ee1e2c82 MS |
930 | static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, |
931 | enum ipoib_flush_level level) | |
1da177e4 | 932 | { |
26bbf13c | 933 | struct ipoib_dev_priv *cpriv; |
c4028958 | 934 | struct net_device *dev = priv->dev; |
c2904141 | 935 | int result; |
26bbf13c | 936 | |
f47944cc | 937 | down_read(&priv->vlan_rwsem); |
1da177e4 | 938 | |
26bbf13c YE |
939 | /* |
940 | * Flush any child interfaces too -- they might be up even if | |
941 | * the parent is down. | |
942 | */ | |
943 | list_for_each_entry(cpriv, &priv->child_intfs, list) | |
ee1e2c82 | 944 | __ipoib_ib_dev_flush(cpriv, level); |
26bbf13c | 945 | |
f47944cc | 946 | up_read(&priv->vlan_rwsem); |
26bbf13c | 947 | |
dd57c930 AE |
948 | if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) && |
949 | level != IPOIB_FLUSH_HEAVY) { | |
7a343d4c LA |
950 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); |
951 | return; | |
952 | } | |
953 | ||
954 | if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { | |
dd57c930 AE |
955 | /* interface is down. update pkey and leave. */ |
956 | if (level == IPOIB_FLUSH_HEAVY) { | |
957 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) | |
958 | update_parent_pkey(priv); | |
959 | else | |
960 | update_child_pkey(priv); | |
961 | } | |
7a343d4c | 962 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); |
1da177e4 | 963 | return; |
7a343d4c | 964 | } |
1da177e4 | 965 | |
ee1e2c82 | 966 | if (level == IPOIB_FLUSH_HEAVY) { |
c2904141 ES |
967 | /* child devices chase their origin pkey value, while non-child |
968 | * (parent) devices should always takes what present in pkey index 0 | |
969 | */ | |
970 | if (test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
dd57c930 AE |
971 | result = update_child_pkey(priv); |
972 | if (result) { | |
973 | /* restart QP only if P_Key index is changed */ | |
c2904141 | 974 | ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); |
9fdd5e5b | 975 | return; |
c2904141 | 976 | } |
dd57c930 | 977 | |
c2904141 ES |
978 | } else { |
979 | result = update_parent_pkey(priv); | |
980 | /* restart QP only if P_Key value changed */ | |
981 | if (result) { | |
982 | ipoib_dbg(priv, "Not flushing - P_Key value not changed.\n"); | |
983 | return; | |
984 | } | |
26bbf13c | 985 | } |
26bbf13c YE |
986 | } |
987 | ||
ee1e2c82 MS |
988 | if (level == IPOIB_FLUSH_LIGHT) { |
989 | ipoib_mark_paths_invalid(dev); | |
990 | ipoib_mcast_dev_flush(dev); | |
efc82eee | 991 | ipoib_flush_ah(dev); |
ee1e2c82 | 992 | } |
1da177e4 | 993 | |
ee1e2c82 | 994 | if (level >= IPOIB_FLUSH_NORMAL) |
efc82eee | 995 | ipoib_ib_dev_down(dev); |
1da177e4 | 996 | |
ee1e2c82 | 997 | if (level == IPOIB_FLUSH_HEAVY) { |
dd57c930 | 998 | if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
efc82eee DL |
999 | ipoib_ib_dev_stop(dev); |
1000 | if (ipoib_ib_dev_open(dev) != 0) | |
dd57c930 AE |
1001 | return; |
1002 | if (netif_queue_stopped(dev)) | |
1003 | netif_start_queue(dev); | |
26bbf13c YE |
1004 | } |
1005 | ||
1da177e4 LT |
1006 | /* |
1007 | * The device could have been brought down between the start and when | |
1008 | * we get here, don't bring it back up if it's not configured up | |
1009 | */ | |
5ccd0255 | 1010 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { |
ee1e2c82 MS |
1011 | if (level >= IPOIB_FLUSH_NORMAL) |
1012 | ipoib_ib_dev_up(dev); | |
c4028958 | 1013 | ipoib_mcast_restart_task(&priv->restart_task); |
5ccd0255 | 1014 | } |
26bbf13c | 1015 | } |
1da177e4 | 1016 | |
ee1e2c82 MS |
1017 | void ipoib_ib_dev_flush_light(struct work_struct *work) |
1018 | { | |
1019 | struct ipoib_dev_priv *priv = | |
1020 | container_of(work, struct ipoib_dev_priv, flush_light); | |
1021 | ||
1022 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT); | |
1023 | } | |
1024 | ||
1025 | void ipoib_ib_dev_flush_normal(struct work_struct *work) | |
26bbf13c YE |
1026 | { |
1027 | struct ipoib_dev_priv *priv = | |
ee1e2c82 | 1028 | container_of(work, struct ipoib_dev_priv, flush_normal); |
4f71055a | 1029 | |
ee1e2c82 | 1030 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL); |
26bbf13c | 1031 | } |
4f71055a | 1032 | |
ee1e2c82 | 1033 | void ipoib_ib_dev_flush_heavy(struct work_struct *work) |
26bbf13c YE |
1034 | { |
1035 | struct ipoib_dev_priv *priv = | |
ee1e2c82 | 1036 | container_of(work, struct ipoib_dev_priv, flush_heavy); |
26bbf13c | 1037 | |
ee1e2c82 | 1038 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY); |
1da177e4 LT |
1039 | } |
1040 | ||
1041 | void ipoib_ib_dev_cleanup(struct net_device *dev) | |
1042 | { | |
1043 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1044 | ||
1045 | ipoib_dbg(priv, "cleaning up ib_dev\n"); | |
a39c52ab ES |
1046 | /* |
1047 | * We must make sure there are no more (path) completions | |
1048 | * that may wish to touch priv fields that are no longer valid | |
1049 | */ | |
1050 | ipoib_flush_paths(dev); | |
1da177e4 | 1051 | |
efc82eee | 1052 | ipoib_mcast_stop_thread(dev); |
988bd503 | 1053 | ipoib_mcast_dev_flush(dev); |
1da177e4 | 1054 | |
e135106f DL |
1055 | /* |
1056 | * All of our ah references aren't free until after | |
1057 | * ipoib_mcast_dev_flush(), ipoib_flush_paths, and | |
1058 | * the neighbor garbage collection is stopped and reaped. | |
1059 | * That should all be done now, so make a final ah flush. | |
1060 | */ | |
efc82eee | 1061 | ipoib_stop_ah(dev); |
e135106f | 1062 | |
1da177e4 LT |
1063 | ipoib_transport_dev_cleanup(dev); |
1064 | } | |
1065 | ||
1da177e4 | 1066 |