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 | ||
de903512 RD |
248 | ++dev->stats.rx_packets; |
249 | dev->stats.rx_bytes += skb->len; | |
1b844afe RD |
250 | |
251 | skb->dev = dev; | |
d927d505 OG |
252 | if ((dev->features & NETIF_F_RXCSUM) && |
253 | likely(wc->wc_flags & IB_WC_IP_CSUM_OK)) | |
6046136c EC |
254 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
255 | ||
8ae31e5b | 256 | napi_gro_receive(&priv->napi, skb); |
1da177e4 | 257 | |
2439a6e6 RD |
258 | repost: |
259 | if (unlikely(ipoib_ib_post_receive(dev, wr_id))) | |
260 | ipoib_warn(priv, "ipoib_ib_post_receive failed " | |
261 | "for buf %d\n", wr_id); | |
262 | } | |
1da177e4 | 263 | |
c4268778 | 264 | int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req) |
7143740d EC |
265 | { |
266 | struct sk_buff *skb = tx_req->skb; | |
267 | u64 *mapping = tx_req->mapping; | |
268 | int i; | |
40ca1988 | 269 | int off; |
7143740d | 270 | |
40ca1988 EC |
271 | if (skb_headlen(skb)) { |
272 | mapping[0] = ib_dma_map_single(ca, skb->data, skb_headlen(skb), | |
273 | DMA_TO_DEVICE); | |
274 | if (unlikely(ib_dma_mapping_error(ca, mapping[0]))) | |
275 | return -EIO; | |
276 | ||
277 | off = 1; | |
278 | } else | |
279 | off = 0; | |
7143740d EC |
280 | |
281 | for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { | |
9e903e08 | 282 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
5581be3b IC |
283 | mapping[i + off] = ib_dma_map_page(ca, |
284 | skb_frag_page(frag), | |
9e903e08 | 285 | frag->page_offset, skb_frag_size(frag), |
7143740d | 286 | DMA_TO_DEVICE); |
40ca1988 | 287 | if (unlikely(ib_dma_mapping_error(ca, mapping[i + off]))) |
7143740d EC |
288 | goto partial_error; |
289 | } | |
290 | return 0; | |
291 | ||
292 | partial_error: | |
7143740d | 293 | for (; i > 0; --i) { |
9e903e08 ED |
294 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1]; |
295 | ||
296 | ib_dma_unmap_page(ca, mapping[i - !off], skb_frag_size(frag), DMA_TO_DEVICE); | |
7143740d | 297 | } |
40ca1988 EC |
298 | |
299 | if (off) | |
300 | ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE); | |
301 | ||
7143740d EC |
302 | return -EIO; |
303 | } | |
304 | ||
c4268778 YS |
305 | void ipoib_dma_unmap_tx(struct ipoib_dev_priv *priv, |
306 | struct ipoib_tx_buf *tx_req) | |
7143740d EC |
307 | { |
308 | struct sk_buff *skb = tx_req->skb; | |
309 | u64 *mapping = tx_req->mapping; | |
310 | int i; | |
40ca1988 | 311 | int off; |
7143740d | 312 | |
40ca1988 | 313 | if (skb_headlen(skb)) { |
c4268778 YS |
314 | ib_dma_unmap_single(priv->ca, mapping[0], skb_headlen(skb), |
315 | DMA_TO_DEVICE); | |
40ca1988 EC |
316 | off = 1; |
317 | } else | |
318 | off = 0; | |
7143740d EC |
319 | |
320 | for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { | |
9e903e08 ED |
321 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
322 | ||
c4268778 YS |
323 | ib_dma_unmap_page(priv->ca, mapping[i + off], |
324 | skb_frag_size(frag), DMA_TO_DEVICE); | |
7143740d EC |
325 | } |
326 | } | |
327 | ||
2c010730 ES |
328 | /* |
329 | * As the result of a completion error the QP Can be transferred to SQE states. | |
330 | * The function checks if the (send)QP is in SQE state and | |
331 | * moves it back to RTS state, that in order to have it functional again. | |
332 | */ | |
333 | static void ipoib_qp_state_validate_work(struct work_struct *work) | |
334 | { | |
335 | struct ipoib_qp_state_validate *qp_work = | |
336 | container_of(work, struct ipoib_qp_state_validate, work); | |
337 | ||
338 | struct ipoib_dev_priv *priv = qp_work->priv; | |
339 | struct ib_qp_attr qp_attr; | |
340 | struct ib_qp_init_attr query_init_attr; | |
341 | int ret; | |
342 | ||
343 | ret = ib_query_qp(priv->qp, &qp_attr, IB_QP_STATE, &query_init_attr); | |
344 | if (ret) { | |
345 | ipoib_warn(priv, "%s: Failed to query QP ret: %d\n", | |
346 | __func__, ret); | |
347 | goto free_res; | |
348 | } | |
349 | pr_info("%s: QP: 0x%x is in state: %d\n", | |
350 | __func__, priv->qp->qp_num, qp_attr.qp_state); | |
351 | ||
352 | /* currently support only in SQE->RTS transition*/ | |
353 | if (qp_attr.qp_state == IB_QPS_SQE) { | |
354 | qp_attr.qp_state = IB_QPS_RTS; | |
355 | ||
356 | ret = ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE); | |
357 | if (ret) { | |
358 | pr_warn("failed(%d) modify QP:0x%x SQE->RTS\n", | |
359 | ret, priv->qp->qp_num); | |
360 | goto free_res; | |
361 | } | |
362 | pr_info("%s: QP: 0x%x moved from IB_QPS_SQE to IB_QPS_RTS\n", | |
363 | __func__, priv->qp->qp_num); | |
364 | } else { | |
365 | pr_warn("QP (%d) will stay in state: %d\n", | |
366 | priv->qp->qp_num, qp_attr.qp_state); | |
367 | } | |
368 | ||
369 | free_res: | |
370 | kfree(qp_work); | |
371 | } | |
372 | ||
2439a6e6 RD |
373 | static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc) |
374 | { | |
375 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
376 | unsigned int wr_id = wc->wr_id; | |
377 | struct ipoib_tx_buf *tx_req; | |
1da177e4 | 378 | |
a89875fc RD |
379 | ipoib_dbg_data(priv, "send completion: id %d, status: %d\n", |
380 | wr_id, wc->status); | |
1da177e4 | 381 | |
2439a6e6 RD |
382 | if (unlikely(wr_id >= ipoib_sendq_size)) { |
383 | ipoib_warn(priv, "send completion event with wrid %d (> %d)\n", | |
384 | wr_id, ipoib_sendq_size); | |
385 | return; | |
1da177e4 | 386 | } |
2439a6e6 RD |
387 | |
388 | tx_req = &priv->tx_ring[wr_id]; | |
389 | ||
c4268778 | 390 | ipoib_dma_unmap_tx(priv, tx_req); |
2439a6e6 | 391 | |
de903512 RD |
392 | ++dev->stats.tx_packets; |
393 | dev->stats.tx_bytes += tx_req->skb->len; | |
2439a6e6 RD |
394 | |
395 | dev_kfree_skb_any(tx_req->skb); | |
396 | ||
2439a6e6 | 397 | ++priv->tx_tail; |
1b524963 MT |
398 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
399 | netif_queue_stopped(dev) && | |
400 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
2439a6e6 | 401 | netif_wake_queue(dev); |
2439a6e6 RD |
402 | |
403 | if (wc->status != IB_WC_SUCCESS && | |
2c010730 ES |
404 | wc->status != IB_WC_WR_FLUSH_ERR) { |
405 | struct ipoib_qp_state_validate *qp_work; | |
2439a6e6 RD |
406 | ipoib_warn(priv, "failed send event " |
407 | "(status=%d, wrid=%d vend_err %x)\n", | |
408 | wc->status, wr_id, wc->vendor_err); | |
2c010730 ES |
409 | qp_work = kzalloc(sizeof(*qp_work), GFP_ATOMIC); |
410 | if (!qp_work) { | |
411 | ipoib_warn(priv, "%s Failed alloc ipoib_qp_state_validate for qp: 0x%x\n", | |
412 | __func__, priv->qp->qp_num); | |
413 | return; | |
414 | } | |
415 | ||
416 | INIT_WORK(&qp_work->work, ipoib_qp_state_validate_work); | |
417 | qp_work->priv = priv; | |
418 | queue_work(priv->wq, &qp_work->work); | |
419 | } | |
2439a6e6 RD |
420 | } |
421 | ||
f56bcd80 EC |
422 | static int poll_tx(struct ipoib_dev_priv *priv) |
423 | { | |
424 | int n, i; | |
425 | ||
426 | n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc); | |
427 | for (i = 0; i < n; ++i) | |
428 | ipoib_ib_handle_tx_wc(priv->dev, priv->send_wc + i); | |
429 | ||
430 | return n == MAX_SEND_CQE; | |
431 | } | |
432 | ||
bea3348e | 433 | int ipoib_poll(struct napi_struct *napi, int budget) |
2439a6e6 | 434 | { |
bea3348e SH |
435 | struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi); |
436 | struct net_device *dev = priv->dev; | |
8d1cc86a RD |
437 | int done; |
438 | int t; | |
8d1cc86a RD |
439 | int n, i; |
440 | ||
441 | done = 0; | |
8d1cc86a | 442 | |
bea3348e SH |
443 | poll_more: |
444 | while (done < budget) { | |
445 | int max = (budget - done); | |
446 | ||
8d1cc86a | 447 | t = min(IPOIB_NUM_WC, max); |
f56bcd80 | 448 | n = ib_poll_cq(priv->recv_cq, t, priv->ibwc); |
8d1cc86a | 449 | |
bea3348e | 450 | for (i = 0; i < n; i++) { |
8d1cc86a RD |
451 | struct ib_wc *wc = priv->ibwc + i; |
452 | ||
1b524963 | 453 | if (wc->wr_id & IPOIB_OP_RECV) { |
8d1cc86a | 454 | ++done; |
1b524963 MT |
455 | if (wc->wr_id & IPOIB_OP_CM) |
456 | ipoib_cm_handle_rx_wc(dev, wc); | |
457 | else | |
458 | ipoib_ib_handle_rx_wc(dev, wc); | |
f56bcd80 EC |
459 | } else |
460 | ipoib_cm_handle_tx_wc(priv->dev, wc); | |
8d1cc86a RD |
461 | } |
462 | ||
bea3348e | 463 | if (n != t) |
8d1cc86a | 464 | break; |
8d1cc86a RD |
465 | } |
466 | ||
bea3348e | 467 | if (done < budget) { |
288379f0 | 468 | napi_complete(napi); |
f56bcd80 | 469 | if (unlikely(ib_req_notify_cq(priv->recv_cq, |
8d1cc86a RD |
470 | IB_CQ_NEXT_COMP | |
471 | IB_CQ_REPORT_MISSED_EVENTS)) && | |
288379f0 | 472 | napi_reschedule(napi)) |
bea3348e | 473 | goto poll_more; |
8d1cc86a RD |
474 | } |
475 | ||
bea3348e | 476 | return done; |
1da177e4 LT |
477 | } |
478 | ||
479 | void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) | |
480 | { | |
bea3348e SH |
481 | struct net_device *dev = dev_ptr; |
482 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
483 | ||
288379f0 | 484 | napi_schedule(&priv->napi); |
1da177e4 LT |
485 | } |
486 | ||
57ce41d1 EC |
487 | static void drain_tx_cq(struct net_device *dev) |
488 | { | |
489 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
57ce41d1 | 490 | |
943c246e | 491 | netif_tx_lock(dev); |
57ce41d1 EC |
492 | while (poll_tx(priv)) |
493 | ; /* nothing */ | |
494 | ||
495 | if (netif_queue_stopped(dev)) | |
496 | mod_timer(&priv->poll_timer, jiffies + 1); | |
497 | ||
943c246e | 498 | netif_tx_unlock(dev); |
57ce41d1 EC |
499 | } |
500 | ||
501 | void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr) | |
502 | { | |
943c246e RD |
503 | struct ipoib_dev_priv *priv = netdev_priv(dev_ptr); |
504 | ||
505 | mod_timer(&priv->poll_timer, jiffies); | |
57ce41d1 EC |
506 | } |
507 | ||
1da177e4 LT |
508 | static inline int post_send(struct ipoib_dev_priv *priv, |
509 | unsigned int wr_id, | |
510 | struct ib_ah *address, u32 qpn, | |
40ca1988 EC |
511 | struct ipoib_tx_buf *tx_req, |
512 | void *head, int hlen) | |
1da177e4 LT |
513 | { |
514 | struct ib_send_wr *bad_wr; | |
40ca1988 | 515 | struct sk_buff *skb = tx_req->skb; |
40ca1988 | 516 | |
c4268778 | 517 | ipoib_build_sge(priv, tx_req); |
1da177e4 | 518 | |
e622f2f4 CH |
519 | priv->tx_wr.wr.wr_id = wr_id; |
520 | priv->tx_wr.remote_qpn = qpn; | |
521 | priv->tx_wr.ah = address; | |
1da177e4 | 522 | |
40ca1988 | 523 | if (head) { |
e622f2f4 CH |
524 | priv->tx_wr.mss = skb_shinfo(skb)->gso_size; |
525 | priv->tx_wr.header = head; | |
526 | priv->tx_wr.hlen = hlen; | |
527 | priv->tx_wr.wr.opcode = IB_WR_LSO; | |
40ca1988 | 528 | } else |
e622f2f4 | 529 | priv->tx_wr.wr.opcode = IB_WR_SEND; |
40ca1988 | 530 | |
e622f2f4 | 531 | return ib_post_send(priv->qp, &priv->tx_wr.wr, &bad_wr); |
1da177e4 LT |
532 | } |
533 | ||
534 | void ipoib_send(struct net_device *dev, struct sk_buff *skb, | |
535 | struct ipoib_ah *address, u32 qpn) | |
536 | { | |
537 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1993d683 | 538 | struct ipoib_tx_buf *tx_req; |
a48f509b | 539 | int hlen, rc; |
40ca1988 EC |
540 | void *phead; |
541 | ||
542 | if (skb_is_gso(skb)) { | |
543 | hlen = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
544 | phead = skb->data; | |
545 | if (unlikely(!skb_pull(skb, hlen))) { | |
546 | ipoib_warn(priv, "linear data too small\n"); | |
547 | ++dev->stats.tx_dropped; | |
548 | ++dev->stats.tx_errors; | |
549 | dev_kfree_skb_any(skb); | |
550 | return; | |
551 | } | |
552 | } else { | |
553 | if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) { | |
554 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", | |
555 | skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN); | |
556 | ++dev->stats.tx_dropped; | |
557 | ++dev->stats.tx_errors; | |
558 | ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu); | |
559 | return; | |
560 | } | |
561 | phead = NULL; | |
562 | hlen = 0; | |
1da177e4 LT |
563 | } |
564 | ||
565 | ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n", | |
566 | skb->len, address, qpn); | |
567 | ||
568 | /* | |
569 | * We put the skb into the tx_ring _before_ we call post_send() | |
570 | * because it's entirely possible that the completion handler will | |
571 | * run before we execute anything after the post_send(). That | |
572 | * means we have to make sure everything is properly recorded and | |
573 | * our state is consistent before we call post_send(). | |
574 | */ | |
0f485251 | 575 | tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)]; |
1da177e4 | 576 | tx_req->skb = skb; |
7143740d | 577 | if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) { |
de903512 | 578 | ++dev->stats.tx_errors; |
73fbe8be RD |
579 | dev_kfree_skb_any(skb); |
580 | return; | |
581 | } | |
1da177e4 | 582 | |
6046136c | 583 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
e622f2f4 | 584 | priv->tx_wr.wr.send_flags |= IB_SEND_IP_CSUM; |
6046136c | 585 | else |
e622f2f4 | 586 | priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM; |
6046136c | 587 | |
57ce41d1 EC |
588 | if (++priv->tx_outstanding == ipoib_sendq_size) { |
589 | ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); | |
590 | if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP)) | |
591 | ipoib_warn(priv, "request notify on send CQ failed\n"); | |
592 | netif_stop_queue(dev); | |
593 | } | |
594 | ||
7e5a90c2 SP |
595 | skb_orphan(skb); |
596 | skb_dst_drop(skb); | |
597 | ||
a48f509b OG |
598 | rc = post_send(priv, priv->tx_head & (ipoib_sendq_size - 1), |
599 | address->ah, qpn, tx_req, phead, hlen); | |
600 | if (unlikely(rc)) { | |
601 | ipoib_warn(priv, "post_send failed, error %d\n", rc); | |
de903512 | 602 | ++dev->stats.tx_errors; |
57ce41d1 | 603 | --priv->tx_outstanding; |
c4268778 | 604 | ipoib_dma_unmap_tx(priv, tx_req); |
1da177e4 | 605 | dev_kfree_skb_any(skb); |
57ce41d1 EC |
606 | if (netif_queue_stopped(dev)) |
607 | netif_wake_queue(dev); | |
1da177e4 LT |
608 | } else { |
609 | dev->trans_start = jiffies; | |
610 | ||
611 | address->last_send = priv->tx_head; | |
612 | ++priv->tx_head; | |
1da177e4 | 613 | } |
f56bcd80 EC |
614 | |
615 | if (unlikely(priv->tx_outstanding > MAX_SEND_CQE)) | |
57ce41d1 EC |
616 | while (poll_tx(priv)) |
617 | ; /* nothing */ | |
1da177e4 LT |
618 | } |
619 | ||
620 | static void __ipoib_reap_ah(struct net_device *dev) | |
621 | { | |
622 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
623 | struct ipoib_ah *ah, *tah; | |
624 | LIST_HEAD(remove_list); | |
943c246e RD |
625 | unsigned long flags; |
626 | ||
627 | netif_tx_lock_bh(dev); | |
628 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 629 | |
1da177e4 | 630 | list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) |
2181858b | 631 | if ((int) priv->tx_tail - (int) ah->last_send >= 0) { |
1da177e4 | 632 | list_del(&ah->list); |
31c02e21 RD |
633 | ib_destroy_ah(ah->ah); |
634 | kfree(ah); | |
1da177e4 | 635 | } |
943c246e RD |
636 | |
637 | spin_unlock_irqrestore(&priv->lock, flags); | |
638 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
639 | } |
640 | ||
c4028958 | 641 | void ipoib_reap_ah(struct work_struct *work) |
1da177e4 | 642 | { |
c4028958 DH |
643 | struct ipoib_dev_priv *priv = |
644 | container_of(work, struct ipoib_dev_priv, ah_reap_task.work); | |
645 | struct net_device *dev = priv->dev; | |
1da177e4 LT |
646 | |
647 | __ipoib_reap_ah(dev); | |
648 | ||
649 | if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) | |
0b39578b | 650 | queue_delayed_work(priv->wq, &priv->ah_reap_task, |
69fc507a | 651 | round_jiffies_relative(HZ)); |
1da177e4 LT |
652 | } |
653 | ||
efc82eee | 654 | static void ipoib_flush_ah(struct net_device *dev) |
e135106f DL |
655 | { |
656 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
657 | ||
658 | cancel_delayed_work(&priv->ah_reap_task); | |
efc82eee | 659 | flush_workqueue(priv->wq); |
e135106f DL |
660 | ipoib_reap_ah(&priv->ah_reap_task.work); |
661 | } | |
662 | ||
efc82eee | 663 | static void ipoib_stop_ah(struct net_device *dev) |
e135106f DL |
664 | { |
665 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
666 | ||
667 | set_bit(IPOIB_STOP_REAPER, &priv->flags); | |
efc82eee | 668 | ipoib_flush_ah(dev); |
e135106f DL |
669 | } |
670 | ||
57ce41d1 EC |
671 | static void ipoib_ib_tx_timer_func(unsigned long ctx) |
672 | { | |
673 | drain_tx_cq((struct net_device *)ctx); | |
674 | } | |
675 | ||
efc82eee | 676 | int ipoib_ib_dev_open(struct net_device *dev) |
1da177e4 LT |
677 | { |
678 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
679 | int ret; | |
680 | ||
dd57c930 AE |
681 | ipoib_pkey_dev_check_presence(dev); |
682 | ||
683 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
684 | ipoib_warn(priv, "P_Key 0x%04x is %s\n", priv->pkey, | |
685 | (!(priv->pkey & 0x7fff) ? "Invalid" : "not found")); | |
26bbf13c YE |
686 | return -1; |
687 | } | |
26bbf13c | 688 | |
5b6810e0 | 689 | ret = ipoib_init_qp(dev); |
1da177e4 | 690 | if (ret) { |
5b6810e0 | 691 | ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); |
1da177e4 LT |
692 | return -1; |
693 | } | |
694 | ||
695 | ret = ipoib_ib_post_receives(dev); | |
696 | if (ret) { | |
697 | ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); | |
c2bb5628 | 698 | goto dev_stop; |
1da177e4 LT |
699 | } |
700 | ||
839fcaba MT |
701 | ret = ipoib_cm_dev_open(dev); |
702 | if (ret) { | |
24bd1e4e | 703 | ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret); |
c2bb5628 | 704 | goto dev_stop; |
839fcaba MT |
705 | } |
706 | ||
1da177e4 | 707 | clear_bit(IPOIB_STOP_REAPER, &priv->flags); |
0b39578b | 708 | queue_delayed_work(priv->wq, &priv->ah_reap_task, |
69fc507a | 709 | round_jiffies_relative(HZ)); |
1da177e4 | 710 | |
e028cc55 YE |
711 | if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
712 | napi_enable(&priv->napi); | |
7a343d4c | 713 | |
1da177e4 | 714 | return 0; |
c2bb5628 ES |
715 | dev_stop: |
716 | if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) | |
717 | napi_enable(&priv->napi); | |
efc82eee | 718 | ipoib_ib_dev_stop(dev); |
c2bb5628 | 719 | return -1; |
1da177e4 LT |
720 | } |
721 | ||
db84f880 | 722 | void ipoib_pkey_dev_check_presence(struct net_device *dev) |
7a343d4c LA |
723 | { |
724 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
7a343d4c | 725 | |
dd57c930 AE |
726 | if (!(priv->pkey & 0x7fff) || |
727 | ib_find_pkey(priv->ca, priv->port, priv->pkey, | |
728 | &priv->pkey_index)) | |
7a343d4c LA |
729 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); |
730 | else | |
731 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
732 | } | |
733 | ||
1da177e4 LT |
734 | int ipoib_ib_dev_up(struct net_device *dev) |
735 | { | |
736 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
737 | ||
7a343d4c LA |
738 | ipoib_pkey_dev_check_presence(dev); |
739 | ||
740 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
741 | ipoib_dbg(priv, "PKEY is not assigned.\n"); | |
742 | return 0; | |
743 | } | |
744 | ||
1da177e4 LT |
745 | set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); |
746 | ||
747 | return ipoib_mcast_start_thread(dev); | |
748 | } | |
749 | ||
efc82eee | 750 | int ipoib_ib_dev_down(struct net_device *dev) |
1da177e4 LT |
751 | { |
752 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
753 | ||
754 | ipoib_dbg(priv, "downing ib_dev\n"); | |
755 | ||
756 | clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
757 | netif_carrier_off(dev); | |
758 | ||
efc82eee | 759 | ipoib_mcast_stop_thread(dev); |
1da177e4 LT |
760 | ipoib_mcast_dev_flush(dev); |
761 | ||
1da177e4 LT |
762 | ipoib_flush_paths(dev); |
763 | ||
764 | return 0; | |
765 | } | |
766 | ||
767 | static int recvs_pending(struct net_device *dev) | |
768 | { | |
769 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
770 | int pending = 0; | |
771 | int i; | |
772 | ||
0f485251 | 773 | for (i = 0; i < ipoib_recvq_size; ++i) |
1da177e4 LT |
774 | if (priv->rx_ring[i].skb) |
775 | ++pending; | |
776 | ||
777 | return pending; | |
778 | } | |
779 | ||
2dfbfc37 MT |
780 | void ipoib_drain_cq(struct net_device *dev) |
781 | { | |
782 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
783 | int i, n; | |
943c246e RD |
784 | |
785 | /* | |
786 | * We call completion handling routines that expect to be | |
787 | * called from the BH-disabled NAPI poll context, so disable | |
788 | * BHs here too. | |
789 | */ | |
790 | local_bh_disable(); | |
791 | ||
2dfbfc37 | 792 | do { |
f56bcd80 | 793 | n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); |
2dfbfc37 | 794 | for (i = 0; i < n; ++i) { |
ce423ef5 RD |
795 | /* |
796 | * Convert any successful completions to flush | |
797 | * errors to avoid passing packets up the | |
798 | * stack after bringing the device down. | |
799 | */ | |
800 | if (priv->ibwc[i].status == IB_WC_SUCCESS) | |
801 | priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; | |
802 | ||
1b524963 MT |
803 | if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) { |
804 | if (priv->ibwc[i].wr_id & IPOIB_OP_CM) | |
805 | ipoib_cm_handle_rx_wc(dev, priv->ibwc + i); | |
806 | else | |
807 | ipoib_ib_handle_rx_wc(dev, priv->ibwc + i); | |
f56bcd80 EC |
808 | } else |
809 | ipoib_cm_handle_tx_wc(dev, priv->ibwc + i); | |
2dfbfc37 MT |
810 | } |
811 | } while (n == IPOIB_NUM_WC); | |
f56bcd80 EC |
812 | |
813 | while (poll_tx(priv)) | |
814 | ; /* nothing */ | |
943c246e RD |
815 | |
816 | local_bh_enable(); | |
2dfbfc37 MT |
817 | } |
818 | ||
efc82eee | 819 | int ipoib_ib_dev_stop(struct net_device *dev) |
1da177e4 LT |
820 | { |
821 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
822 | struct ib_qp_attr qp_attr; | |
1da177e4 | 823 | unsigned long begin; |
1993d683 | 824 | struct ipoib_tx_buf *tx_req; |
2dfbfc37 | 825 | int i; |
1da177e4 | 826 | |
e028cc55 YE |
827 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
828 | napi_disable(&priv->napi); | |
7a343d4c | 829 | |
839fcaba MT |
830 | ipoib_cm_dev_stop(dev); |
831 | ||
3bc12e75 RD |
832 | /* |
833 | * Move our QP to the error state and then reinitialize in | |
834 | * when all work requests have completed or have been flushed. | |
835 | */ | |
1da177e4 | 836 | qp_attr.qp_state = IB_QPS_ERR; |
3bc12e75 | 837 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
1da177e4 LT |
838 | ipoib_warn(priv, "Failed to modify QP to ERROR state\n"); |
839 | ||
840 | /* Wait for all sends and receives to complete */ | |
841 | begin = jiffies; | |
842 | ||
843 | while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) { | |
844 | if (time_after(jiffies, begin + 5 * HZ)) { | |
845 | ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", | |
846 | priv->tx_head - priv->tx_tail, recvs_pending(dev)); | |
847 | ||
848 | /* | |
849 | * assume the HW is wedged and just free up | |
850 | * all our pending work requests. | |
851 | */ | |
2181858b | 852 | while ((int) priv->tx_tail - (int) priv->tx_head < 0) { |
1da177e4 | 853 | tx_req = &priv->tx_ring[priv->tx_tail & |
0f485251 | 854 | (ipoib_sendq_size - 1)]; |
c4268778 | 855 | ipoib_dma_unmap_tx(priv, tx_req); |
1da177e4 LT |
856 | dev_kfree_skb_any(tx_req->skb); |
857 | ++priv->tx_tail; | |
1b524963 | 858 | --priv->tx_outstanding; |
1da177e4 LT |
859 | } |
860 | ||
37ccf9df RC |
861 | for (i = 0; i < ipoib_recvq_size; ++i) { |
862 | struct ipoib_rx_buf *rx_req; | |
863 | ||
864 | rx_req = &priv->rx_ring[i]; | |
865 | if (!rx_req->skb) | |
866 | continue; | |
bc7b3a36 SM |
867 | ipoib_ud_dma_unmap_rx(priv, |
868 | priv->rx_ring[i].mapping); | |
37ccf9df RC |
869 | dev_kfree_skb_any(rx_req->skb); |
870 | rx_req->skb = NULL; | |
871 | } | |
1da177e4 LT |
872 | |
873 | goto timeout; | |
874 | } | |
875 | ||
2dfbfc37 | 876 | ipoib_drain_cq(dev); |
8d1cc86a | 877 | |
1da177e4 LT |
878 | msleep(1); |
879 | } | |
880 | ||
881 | ipoib_dbg(priv, "All sends and receives done.\n"); | |
882 | ||
883 | timeout: | |
57ce41d1 | 884 | del_timer_sync(&priv->poll_timer); |
1da177e4 | 885 | qp_attr.qp_state = IB_QPS_RESET; |
3bc12e75 | 886 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) |
1da177e4 LT |
887 | ipoib_warn(priv, "Failed to modify QP to RESET state\n"); |
888 | ||
efc82eee | 889 | ipoib_flush_ah(dev); |
1da177e4 | 890 | |
f56bcd80 | 891 | ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP); |
8d1cc86a | 892 | |
1da177e4 LT |
893 | return 0; |
894 | } | |
895 | ||
896 | int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
897 | { | |
898 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
899 | ||
900 | priv->ca = ca; | |
901 | priv->port = port; | |
902 | priv->qp = NULL; | |
903 | ||
904 | if (ipoib_transport_dev_init(dev, ca)) { | |
905 | printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); | |
906 | return -ENODEV; | |
907 | } | |
908 | ||
2767840a RD |
909 | setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func, |
910 | (unsigned long) dev); | |
911 | ||
1da177e4 | 912 | if (dev->flags & IFF_UP) { |
efc82eee | 913 | if (ipoib_ib_dev_open(dev)) { |
1da177e4 LT |
914 | ipoib_transport_dev_cleanup(dev); |
915 | return -ENODEV; | |
916 | } | |
917 | } | |
918 | ||
919 | return 0; | |
920 | } | |
921 | ||
c2904141 ES |
922 | /* |
923 | * Takes whatever value which is in pkey index 0 and updates priv->pkey | |
924 | * returns 0 if the pkey value was changed. | |
925 | */ | |
926 | static inline int update_parent_pkey(struct ipoib_dev_priv *priv) | |
927 | { | |
928 | int result; | |
929 | u16 prev_pkey; | |
930 | ||
931 | prev_pkey = priv->pkey; | |
932 | result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey); | |
933 | if (result) { | |
934 | ipoib_warn(priv, "ib_query_pkey port %d failed (ret = %d)\n", | |
935 | priv->port, result); | |
936 | return result; | |
937 | } | |
938 | ||
939 | priv->pkey |= 0x8000; | |
940 | ||
941 | if (prev_pkey != priv->pkey) { | |
942 | ipoib_dbg(priv, "pkey changed from 0x%x to 0x%x\n", | |
943 | prev_pkey, priv->pkey); | |
944 | /* | |
945 | * Update the pkey in the broadcast address, while making sure to set | |
946 | * the full membership bit, so that we join the right broadcast group. | |
947 | */ | |
948 | priv->dev->broadcast[8] = priv->pkey >> 8; | |
949 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
950 | return 0; | |
951 | } | |
952 | ||
953 | return 1; | |
954 | } | |
dd57c930 AE |
955 | /* |
956 | * returns 0 if pkey value was found in a different slot. | |
957 | */ | |
958 | static inline int update_child_pkey(struct ipoib_dev_priv *priv) | |
959 | { | |
960 | u16 old_index = priv->pkey_index; | |
961 | ||
962 | priv->pkey_index = 0; | |
963 | ipoib_pkey_dev_check_presence(priv->dev); | |
964 | ||
965 | if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) && | |
966 | (old_index == priv->pkey_index)) | |
967 | return 1; | |
968 | return 0; | |
969 | } | |
c2904141 | 970 | |
ee1e2c82 | 971 | static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, |
8b7cce0d HE |
972 | enum ipoib_flush_level level, |
973 | int nesting) | |
1da177e4 | 974 | { |
26bbf13c | 975 | struct ipoib_dev_priv *cpriv; |
c4028958 | 976 | struct net_device *dev = priv->dev; |
c2904141 | 977 | int result; |
26bbf13c | 978 | |
8b7cce0d | 979 | down_read_nested(&priv->vlan_rwsem, nesting); |
1da177e4 | 980 | |
26bbf13c YE |
981 | /* |
982 | * Flush any child interfaces too -- they might be up even if | |
983 | * the parent is down. | |
984 | */ | |
985 | list_for_each_entry(cpriv, &priv->child_intfs, list) | |
8b7cce0d | 986 | __ipoib_ib_dev_flush(cpriv, level, nesting + 1); |
26bbf13c | 987 | |
f47944cc | 988 | up_read(&priv->vlan_rwsem); |
26bbf13c | 989 | |
dd57c930 AE |
990 | if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) && |
991 | level != IPOIB_FLUSH_HEAVY) { | |
7a343d4c LA |
992 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); |
993 | return; | |
994 | } | |
995 | ||
996 | if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { | |
dd57c930 AE |
997 | /* interface is down. update pkey and leave. */ |
998 | if (level == IPOIB_FLUSH_HEAVY) { | |
999 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) | |
1000 | update_parent_pkey(priv); | |
1001 | else | |
1002 | update_child_pkey(priv); | |
1003 | } | |
7a343d4c | 1004 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); |
1da177e4 | 1005 | return; |
7a343d4c | 1006 | } |
1da177e4 | 1007 | |
ee1e2c82 | 1008 | if (level == IPOIB_FLUSH_HEAVY) { |
c2904141 ES |
1009 | /* child devices chase their origin pkey value, while non-child |
1010 | * (parent) devices should always takes what present in pkey index 0 | |
1011 | */ | |
1012 | if (test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
dd57c930 AE |
1013 | result = update_child_pkey(priv); |
1014 | if (result) { | |
1015 | /* restart QP only if P_Key index is changed */ | |
c2904141 | 1016 | ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); |
9fdd5e5b | 1017 | return; |
c2904141 | 1018 | } |
dd57c930 | 1019 | |
c2904141 ES |
1020 | } else { |
1021 | result = update_parent_pkey(priv); | |
1022 | /* restart QP only if P_Key value changed */ | |
1023 | if (result) { | |
1024 | ipoib_dbg(priv, "Not flushing - P_Key value not changed.\n"); | |
1025 | return; | |
1026 | } | |
26bbf13c | 1027 | } |
26bbf13c YE |
1028 | } |
1029 | ||
ee1e2c82 MS |
1030 | if (level == IPOIB_FLUSH_LIGHT) { |
1031 | ipoib_mark_paths_invalid(dev); | |
1032 | ipoib_mcast_dev_flush(dev); | |
efc82eee | 1033 | ipoib_flush_ah(dev); |
ee1e2c82 | 1034 | } |
1da177e4 | 1035 | |
ee1e2c82 | 1036 | if (level >= IPOIB_FLUSH_NORMAL) |
efc82eee | 1037 | ipoib_ib_dev_down(dev); |
1da177e4 | 1038 | |
ee1e2c82 | 1039 | if (level == IPOIB_FLUSH_HEAVY) { |
dd57c930 | 1040 | if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
efc82eee DL |
1041 | ipoib_ib_dev_stop(dev); |
1042 | if (ipoib_ib_dev_open(dev) != 0) | |
dd57c930 AE |
1043 | return; |
1044 | if (netif_queue_stopped(dev)) | |
1045 | netif_start_queue(dev); | |
26bbf13c YE |
1046 | } |
1047 | ||
1da177e4 LT |
1048 | /* |
1049 | * The device could have been brought down between the start and when | |
1050 | * we get here, don't bring it back up if it's not configured up | |
1051 | */ | |
5ccd0255 | 1052 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { |
ee1e2c82 MS |
1053 | if (level >= IPOIB_FLUSH_NORMAL) |
1054 | ipoib_ib_dev_up(dev); | |
c4028958 | 1055 | ipoib_mcast_restart_task(&priv->restart_task); |
5ccd0255 | 1056 | } |
26bbf13c | 1057 | } |
1da177e4 | 1058 | |
ee1e2c82 MS |
1059 | void ipoib_ib_dev_flush_light(struct work_struct *work) |
1060 | { | |
1061 | struct ipoib_dev_priv *priv = | |
1062 | container_of(work, struct ipoib_dev_priv, flush_light); | |
1063 | ||
8b7cce0d | 1064 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT, 0); |
ee1e2c82 MS |
1065 | } |
1066 | ||
1067 | void ipoib_ib_dev_flush_normal(struct work_struct *work) | |
26bbf13c YE |
1068 | { |
1069 | struct ipoib_dev_priv *priv = | |
ee1e2c82 | 1070 | container_of(work, struct ipoib_dev_priv, flush_normal); |
4f71055a | 1071 | |
8b7cce0d | 1072 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL, 0); |
26bbf13c | 1073 | } |
4f71055a | 1074 | |
ee1e2c82 | 1075 | void ipoib_ib_dev_flush_heavy(struct work_struct *work) |
26bbf13c YE |
1076 | { |
1077 | struct ipoib_dev_priv *priv = | |
ee1e2c82 | 1078 | container_of(work, struct ipoib_dev_priv, flush_heavy); |
26bbf13c | 1079 | |
8b7cce0d | 1080 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY, 0); |
1da177e4 LT |
1081 | } |
1082 | ||
1083 | void ipoib_ib_dev_cleanup(struct net_device *dev) | |
1084 | { | |
1085 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1086 | ||
1087 | ipoib_dbg(priv, "cleaning up ib_dev\n"); | |
a39c52ab ES |
1088 | /* |
1089 | * We must make sure there are no more (path) completions | |
1090 | * that may wish to touch priv fields that are no longer valid | |
1091 | */ | |
1092 | ipoib_flush_paths(dev); | |
1da177e4 | 1093 | |
efc82eee | 1094 | ipoib_mcast_stop_thread(dev); |
988bd503 | 1095 | ipoib_mcast_dev_flush(dev); |
1da177e4 | 1096 | |
e135106f DL |
1097 | /* |
1098 | * All of our ah references aren't free until after | |
1099 | * ipoib_mcast_dev_flush(), ipoib_flush_paths, and | |
1100 | * the neighbor garbage collection is stopped and reaped. | |
1101 | * That should all be done now, so make a final ah flush. | |
1102 | */ | |
efc82eee | 1103 | ipoib_stop_ah(dev); |
e135106f | 1104 | |
1da177e4 LT |
1105 | ipoib_transport_dev_cleanup(dev); |
1106 | } | |
1107 | ||
1da177e4 | 1108 |