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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 | ||
1da177e4 | 54 | struct ipoib_ah *ipoib_create_ah(struct net_device *dev, |
90898850 | 55 | struct ib_pd *pd, struct rdma_ah_attr *attr) |
1da177e4 LT |
56 | { |
57 | struct ipoib_ah *ah; | |
3874397c | 58 | struct ib_ah *vah; |
1da177e4 LT |
59 | |
60 | ah = kmalloc(sizeof *ah, GFP_KERNEL); | |
61 | if (!ah) | |
3874397c | 62 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
63 | |
64 | ah->dev = dev; | |
65 | ah->last_send = 0; | |
66 | kref_init(&ah->ref); | |
67 | ||
0a18cfe4 | 68 | vah = rdma_create_ah(pd, attr); |
3874397c | 69 | if (IS_ERR(vah)) { |
1da177e4 | 70 | kfree(ah); |
3874397c MM |
71 | ah = (struct ipoib_ah *)vah; |
72 | } else { | |
73 | ah->ah = vah; | |
c1048aff | 74 | ipoib_dbg(ipoib_priv(dev), "Created ah %p\n", ah->ah); |
3874397c | 75 | } |
1da177e4 LT |
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); | |
c1048aff | 83 | struct ipoib_dev_priv *priv = ipoib_priv(ah->dev); |
1da177e4 LT |
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 | { | |
a44878d1 ES |
95 | ib_dma_unmap_single(priv->ca, mapping[0], |
96 | IPOIB_UD_BUF_SIZE(priv->max_ib_mtu), | |
97 | DMA_FROM_DEVICE); | |
bc7b3a36 SM |
98 | } |
99 | ||
1993d683 | 100 | static int ipoib_ib_post_receive(struct net_device *dev, int id) |
1da177e4 | 101 | { |
c1048aff | 102 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 | 103 | struct ib_recv_wr *bad_wr; |
1993d683 RD |
104 | int ret; |
105 | ||
bc7b3a36 SM |
106 | priv->rx_wr.wr_id = id | IPOIB_OP_RECV; |
107 | priv->rx_sge[0].addr = priv->rx_ring[id].mapping[0]; | |
108 | priv->rx_sge[1].addr = priv->rx_ring[id].mapping[1]; | |
1993d683 | 109 | |
1993d683 | 110 | |
bc7b3a36 | 111 | ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr); |
1993d683 RD |
112 | if (unlikely(ret)) { |
113 | ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret); | |
bc7b3a36 | 114 | ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[id].mapping); |
1993d683 RD |
115 | dev_kfree_skb_any(priv->rx_ring[id].skb); |
116 | priv->rx_ring[id].skb = NULL; | |
117 | } | |
1da177e4 | 118 | |
1993d683 | 119 | return ret; |
1da177e4 LT |
120 | } |
121 | ||
bc7b3a36 | 122 | static struct sk_buff *ipoib_alloc_rx_skb(struct net_device *dev, int id) |
1da177e4 | 123 | { |
c1048aff | 124 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 | 125 | struct sk_buff *skb; |
bc7b3a36 SM |
126 | int buf_size; |
127 | u64 *mapping; | |
1da177e4 | 128 | |
a44878d1 | 129 | buf_size = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu); |
bc7b3a36 | 130 | |
fc791b63 | 131 | skb = dev_alloc_skb(buf_size + IPOIB_HARD_LEN); |
bc7b3a36 SM |
132 | if (unlikely(!skb)) |
133 | return NULL; | |
1993d683 RD |
134 | |
135 | /* | |
fc791b63 PA |
136 | * the IP header will be at IPOIP_HARD_LEN + IB_GRH_BYTES, that is |
137 | * 64 bytes aligned | |
1993d683 | 138 | */ |
fc791b63 | 139 | skb_reserve(skb, sizeof(struct ipoib_pseudo_header)); |
1993d683 | 140 | |
bc7b3a36 SM |
141 | mapping = priv->rx_ring[id].mapping; |
142 | mapping[0] = ib_dma_map_single(priv->ca, skb->data, buf_size, | |
143 | DMA_FROM_DEVICE); | |
144 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0]))) | |
145 | goto error; | |
146 | ||
bc7b3a36 SM |
147 | priv->rx_ring[id].skb = skb; |
148 | return skb; | |
bc7b3a36 SM |
149 | error: |
150 | dev_kfree_skb_any(skb); | |
151 | return NULL; | |
1da177e4 LT |
152 | } |
153 | ||
154 | static int ipoib_ib_post_receives(struct net_device *dev) | |
155 | { | |
c1048aff | 156 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 LT |
157 | int i; |
158 | ||
0f485251 | 159 | for (i = 0; i < ipoib_recvq_size; ++i) { |
bc7b3a36 | 160 | if (!ipoib_alloc_rx_skb(dev, i)) { |
1993d683 RD |
161 | ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); |
162 | return -ENOMEM; | |
163 | } | |
1da177e4 LT |
164 | if (ipoib_ib_post_receive(dev, i)) { |
165 | ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i); | |
166 | return -EIO; | |
167 | } | |
168 | } | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
2439a6e6 | 173 | static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) |
1da177e4 | 174 | { |
c1048aff | 175 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
2439a6e6 RD |
176 | unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV; |
177 | struct sk_buff *skb; | |
bc7b3a36 | 178 | u64 mapping[IPOIB_UD_RX_SG]; |
fed1db33 | 179 | union ib_gid *dgid; |
68996a6e | 180 | union ib_gid *sgid; |
1da177e4 | 181 | |
a89875fc RD |
182 | ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n", |
183 | wr_id, wc->status); | |
1da177e4 | 184 | |
2439a6e6 RD |
185 | if (unlikely(wr_id >= ipoib_recvq_size)) { |
186 | ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n", | |
187 | wr_id, ipoib_recvq_size); | |
188 | return; | |
189 | } | |
190 | ||
191 | skb = priv->rx_ring[wr_id].skb; | |
2439a6e6 RD |
192 | |
193 | if (unlikely(wc->status != IB_WC_SUCCESS)) { | |
194 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
195 | ipoib_warn(priv, "failed recv event " | |
196 | "(status=%d, wrid=%d vend_err %x)\n", | |
197 | wc->status, wr_id, wc->vendor_err); | |
bc7b3a36 | 198 | ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[wr_id].mapping); |
2439a6e6 RD |
199 | dev_kfree_skb_any(skb); |
200 | priv->rx_ring[wr_id].skb = NULL; | |
201 | return; | |
202 | } | |
1da177e4 | 203 | |
bc7b3a36 SM |
204 | memcpy(mapping, priv->rx_ring[wr_id].mapping, |
205 | IPOIB_UD_RX_SG * sizeof *mapping); | |
206 | ||
2439a6e6 RD |
207 | /* |
208 | * If we can't allocate a new RX buffer, dump | |
209 | * this packet and reuse the old buffer. | |
210 | */ | |
bc7b3a36 | 211 | if (unlikely(!ipoib_alloc_rx_skb(dev, wr_id))) { |
de903512 | 212 | ++dev->stats.rx_dropped; |
2439a6e6 RD |
213 | goto repost; |
214 | } | |
215 | ||
216 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", | |
217 | wc->byte_len, wc->slid); | |
218 | ||
bc7b3a36 | 219 | ipoib_ud_dma_unmap_rx(priv, mapping); |
a44878d1 ES |
220 | |
221 | skb_put(skb, wc->byte_len); | |
2439a6e6 | 222 | |
fed1db33 CL |
223 | /* First byte of dgid signals multicast when 0xff */ |
224 | dgid = &((struct ib_grh *)skb->data)->dgid; | |
225 | ||
226 | if (!(wc->wc_flags & IB_WC_GRH) || dgid->raw[0] != 0xff) | |
227 | skb->pkt_type = PACKET_HOST; | |
228 | else if (memcmp(dgid, dev->broadcast + 4, sizeof(union ib_gid)) == 0) | |
229 | skb->pkt_type = PACKET_BROADCAST; | |
230 | else | |
231 | skb->pkt_type = PACKET_MULTICAST; | |
232 | ||
68996a6e EC |
233 | sgid = &((struct ib_grh *)skb->data)->sgid; |
234 | ||
235 | /* | |
236 | * Drop packets that this interface sent, ie multicast packets | |
237 | * that the HCA has replicated. | |
238 | */ | |
239 | if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num) { | |
240 | int need_repost = 1; | |
241 | ||
242 | if ((wc->wc_flags & IB_WC_GRH) && | |
243 | sgid->global.interface_id != priv->local_gid.global.interface_id) | |
244 | need_repost = 0; | |
245 | ||
246 | if (need_repost) { | |
247 | dev_kfree_skb_any(skb); | |
248 | goto repost; | |
249 | } | |
250 | } | |
251 | ||
2439a6e6 RD |
252 | skb_pull(skb, IB_GRH_BYTES); |
253 | ||
1b844afe | 254 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; |
fc791b63 | 255 | skb_add_pseudo_hdr(skb); |
1b844afe | 256 | |
de903512 RD |
257 | ++dev->stats.rx_packets; |
258 | dev->stats.rx_bytes += skb->len; | |
4829d964 AV |
259 | if (skb->pkt_type == PACKET_MULTICAST) |
260 | dev->stats.multicast++; | |
1b844afe RD |
261 | |
262 | skb->dev = dev; | |
d927d505 OG |
263 | if ((dev->features & NETIF_F_RXCSUM) && |
264 | likely(wc->wc_flags & IB_WC_IP_CSUM_OK)) | |
6046136c EC |
265 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
266 | ||
8ae31e5b | 267 | napi_gro_receive(&priv->napi, skb); |
1da177e4 | 268 | |
2439a6e6 RD |
269 | repost: |
270 | if (unlikely(ipoib_ib_post_receive(dev, wr_id))) | |
271 | ipoib_warn(priv, "ipoib_ib_post_receive failed " | |
272 | "for buf %d\n", wr_id); | |
273 | } | |
1da177e4 | 274 | |
c4268778 | 275 | int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req) |
7143740d EC |
276 | { |
277 | struct sk_buff *skb = tx_req->skb; | |
278 | u64 *mapping = tx_req->mapping; | |
279 | int i; | |
40ca1988 | 280 | int off; |
7143740d | 281 | |
40ca1988 EC |
282 | if (skb_headlen(skb)) { |
283 | mapping[0] = ib_dma_map_single(ca, skb->data, skb_headlen(skb), | |
284 | DMA_TO_DEVICE); | |
285 | if (unlikely(ib_dma_mapping_error(ca, mapping[0]))) | |
286 | return -EIO; | |
287 | ||
288 | off = 1; | |
289 | } else | |
290 | off = 0; | |
7143740d EC |
291 | |
292 | for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { | |
9e903e08 | 293 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
5581be3b IC |
294 | mapping[i + off] = ib_dma_map_page(ca, |
295 | skb_frag_page(frag), | |
9e903e08 | 296 | frag->page_offset, skb_frag_size(frag), |
7143740d | 297 | DMA_TO_DEVICE); |
40ca1988 | 298 | if (unlikely(ib_dma_mapping_error(ca, mapping[i + off]))) |
7143740d EC |
299 | goto partial_error; |
300 | } | |
301 | return 0; | |
302 | ||
303 | partial_error: | |
7143740d | 304 | for (; i > 0; --i) { |
9e903e08 ED |
305 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1]; |
306 | ||
307 | ib_dma_unmap_page(ca, mapping[i - !off], skb_frag_size(frag), DMA_TO_DEVICE); | |
7143740d | 308 | } |
40ca1988 EC |
309 | |
310 | if (off) | |
311 | ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE); | |
312 | ||
7143740d EC |
313 | return -EIO; |
314 | } | |
315 | ||
c4268778 YS |
316 | void ipoib_dma_unmap_tx(struct ipoib_dev_priv *priv, |
317 | struct ipoib_tx_buf *tx_req) | |
7143740d EC |
318 | { |
319 | struct sk_buff *skb = tx_req->skb; | |
320 | u64 *mapping = tx_req->mapping; | |
321 | int i; | |
40ca1988 | 322 | int off; |
7143740d | 323 | |
40ca1988 | 324 | if (skb_headlen(skb)) { |
c4268778 YS |
325 | ib_dma_unmap_single(priv->ca, mapping[0], skb_headlen(skb), |
326 | DMA_TO_DEVICE); | |
40ca1988 EC |
327 | off = 1; |
328 | } else | |
329 | off = 0; | |
7143740d EC |
330 | |
331 | for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { | |
9e903e08 ED |
332 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
333 | ||
c4268778 YS |
334 | ib_dma_unmap_page(priv->ca, mapping[i + off], |
335 | skb_frag_size(frag), DMA_TO_DEVICE); | |
7143740d EC |
336 | } |
337 | } | |
338 | ||
2c010730 ES |
339 | /* |
340 | * As the result of a completion error the QP Can be transferred to SQE states. | |
341 | * The function checks if the (send)QP is in SQE state and | |
342 | * moves it back to RTS state, that in order to have it functional again. | |
343 | */ | |
344 | static void ipoib_qp_state_validate_work(struct work_struct *work) | |
345 | { | |
346 | struct ipoib_qp_state_validate *qp_work = | |
347 | container_of(work, struct ipoib_qp_state_validate, work); | |
348 | ||
349 | struct ipoib_dev_priv *priv = qp_work->priv; | |
350 | struct ib_qp_attr qp_attr; | |
351 | struct ib_qp_init_attr query_init_attr; | |
352 | int ret; | |
353 | ||
354 | ret = ib_query_qp(priv->qp, &qp_attr, IB_QP_STATE, &query_init_attr); | |
355 | if (ret) { | |
356 | ipoib_warn(priv, "%s: Failed to query QP ret: %d\n", | |
357 | __func__, ret); | |
358 | goto free_res; | |
359 | } | |
360 | pr_info("%s: QP: 0x%x is in state: %d\n", | |
361 | __func__, priv->qp->qp_num, qp_attr.qp_state); | |
362 | ||
363 | /* currently support only in SQE->RTS transition*/ | |
364 | if (qp_attr.qp_state == IB_QPS_SQE) { | |
365 | qp_attr.qp_state = IB_QPS_RTS; | |
366 | ||
367 | ret = ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE); | |
368 | if (ret) { | |
369 | pr_warn("failed(%d) modify QP:0x%x SQE->RTS\n", | |
370 | ret, priv->qp->qp_num); | |
371 | goto free_res; | |
372 | } | |
373 | pr_info("%s: QP: 0x%x moved from IB_QPS_SQE to IB_QPS_RTS\n", | |
374 | __func__, priv->qp->qp_num); | |
375 | } else { | |
376 | pr_warn("QP (%d) will stay in state: %d\n", | |
377 | priv->qp->qp_num, qp_attr.qp_state); | |
378 | } | |
379 | ||
380 | free_res: | |
381 | kfree(qp_work); | |
382 | } | |
383 | ||
2439a6e6 RD |
384 | static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc) |
385 | { | |
c1048aff | 386 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
2439a6e6 RD |
387 | unsigned int wr_id = wc->wr_id; |
388 | struct ipoib_tx_buf *tx_req; | |
1da177e4 | 389 | |
a89875fc RD |
390 | ipoib_dbg_data(priv, "send completion: id %d, status: %d\n", |
391 | wr_id, wc->status); | |
1da177e4 | 392 | |
2439a6e6 RD |
393 | if (unlikely(wr_id >= ipoib_sendq_size)) { |
394 | ipoib_warn(priv, "send completion event with wrid %d (> %d)\n", | |
395 | wr_id, ipoib_sendq_size); | |
396 | return; | |
1da177e4 | 397 | } |
2439a6e6 RD |
398 | |
399 | tx_req = &priv->tx_ring[wr_id]; | |
400 | ||
c4268778 | 401 | ipoib_dma_unmap_tx(priv, tx_req); |
2439a6e6 | 402 | |
de903512 RD |
403 | ++dev->stats.tx_packets; |
404 | dev->stats.tx_bytes += tx_req->skb->len; | |
2439a6e6 RD |
405 | |
406 | dev_kfree_skb_any(tx_req->skb); | |
407 | ||
2439a6e6 | 408 | ++priv->tx_tail; |
1b524963 MT |
409 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
410 | netif_queue_stopped(dev) && | |
411 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
2439a6e6 | 412 | netif_wake_queue(dev); |
2439a6e6 RD |
413 | |
414 | if (wc->status != IB_WC_SUCCESS && | |
2c010730 ES |
415 | wc->status != IB_WC_WR_FLUSH_ERR) { |
416 | struct ipoib_qp_state_validate *qp_work; | |
2439a6e6 RD |
417 | ipoib_warn(priv, "failed send event " |
418 | "(status=%d, wrid=%d vend_err %x)\n", | |
419 | wc->status, wr_id, wc->vendor_err); | |
2c010730 | 420 | qp_work = kzalloc(sizeof(*qp_work), GFP_ATOMIC); |
74226649 | 421 | if (!qp_work) |
2c010730 | 422 | return; |
2c010730 ES |
423 | |
424 | INIT_WORK(&qp_work->work, ipoib_qp_state_validate_work); | |
425 | qp_work->priv = priv; | |
426 | queue_work(priv->wq, &qp_work->work); | |
427 | } | |
2439a6e6 RD |
428 | } |
429 | ||
f56bcd80 EC |
430 | static int poll_tx(struct ipoib_dev_priv *priv) |
431 | { | |
432 | int n, i; | |
433 | ||
434 | n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc); | |
435 | for (i = 0; i < n; ++i) | |
436 | ipoib_ib_handle_tx_wc(priv->dev, priv->send_wc + i); | |
437 | ||
438 | return n == MAX_SEND_CQE; | |
439 | } | |
440 | ||
bea3348e | 441 | int ipoib_poll(struct napi_struct *napi, int budget) |
2439a6e6 | 442 | { |
bea3348e SH |
443 | struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi); |
444 | struct net_device *dev = priv->dev; | |
8d1cc86a RD |
445 | int done; |
446 | int t; | |
8d1cc86a RD |
447 | int n, i; |
448 | ||
449 | done = 0; | |
8d1cc86a | 450 | |
bea3348e SH |
451 | poll_more: |
452 | while (done < budget) { | |
453 | int max = (budget - done); | |
454 | ||
8d1cc86a | 455 | t = min(IPOIB_NUM_WC, max); |
f56bcd80 | 456 | n = ib_poll_cq(priv->recv_cq, t, priv->ibwc); |
8d1cc86a | 457 | |
bea3348e | 458 | for (i = 0; i < n; i++) { |
8d1cc86a RD |
459 | struct ib_wc *wc = priv->ibwc + i; |
460 | ||
1b524963 | 461 | if (wc->wr_id & IPOIB_OP_RECV) { |
8d1cc86a | 462 | ++done; |
1b524963 MT |
463 | if (wc->wr_id & IPOIB_OP_CM) |
464 | ipoib_cm_handle_rx_wc(dev, wc); | |
465 | else | |
466 | ipoib_ib_handle_rx_wc(dev, wc); | |
f56bcd80 EC |
467 | } else |
468 | ipoib_cm_handle_tx_wc(priv->dev, wc); | |
8d1cc86a RD |
469 | } |
470 | ||
bea3348e | 471 | if (n != t) |
8d1cc86a | 472 | break; |
8d1cc86a RD |
473 | } |
474 | ||
bea3348e | 475 | if (done < budget) { |
288379f0 | 476 | napi_complete(napi); |
f56bcd80 | 477 | if (unlikely(ib_req_notify_cq(priv->recv_cq, |
8d1cc86a RD |
478 | IB_CQ_NEXT_COMP | |
479 | IB_CQ_REPORT_MISSED_EVENTS)) && | |
288379f0 | 480 | napi_reschedule(napi)) |
bea3348e | 481 | goto poll_more; |
8d1cc86a RD |
482 | } |
483 | ||
bea3348e | 484 | return done; |
1da177e4 LT |
485 | } |
486 | ||
487 | void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) | |
488 | { | |
bea3348e | 489 | struct net_device *dev = dev_ptr; |
c1048aff | 490 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
bea3348e | 491 | |
288379f0 | 492 | napi_schedule(&priv->napi); |
1da177e4 LT |
493 | } |
494 | ||
57ce41d1 EC |
495 | static void drain_tx_cq(struct net_device *dev) |
496 | { | |
c1048aff | 497 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
57ce41d1 | 498 | |
943c246e | 499 | netif_tx_lock(dev); |
57ce41d1 EC |
500 | while (poll_tx(priv)) |
501 | ; /* nothing */ | |
502 | ||
503 | if (netif_queue_stopped(dev)) | |
504 | mod_timer(&priv->poll_timer, jiffies + 1); | |
505 | ||
943c246e | 506 | netif_tx_unlock(dev); |
57ce41d1 EC |
507 | } |
508 | ||
509 | void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr) | |
510 | { | |
c1048aff | 511 | struct ipoib_dev_priv *priv = ipoib_priv(dev_ptr); |
943c246e RD |
512 | |
513 | mod_timer(&priv->poll_timer, jiffies); | |
57ce41d1 EC |
514 | } |
515 | ||
1da177e4 LT |
516 | static inline int post_send(struct ipoib_dev_priv *priv, |
517 | unsigned int wr_id, | |
10adcbd2 | 518 | struct ib_ah *address, u32 dqpn, |
40ca1988 EC |
519 | struct ipoib_tx_buf *tx_req, |
520 | void *head, int hlen) | |
1da177e4 LT |
521 | { |
522 | struct ib_send_wr *bad_wr; | |
40ca1988 | 523 | struct sk_buff *skb = tx_req->skb; |
40ca1988 | 524 | |
c4268778 | 525 | ipoib_build_sge(priv, tx_req); |
1da177e4 | 526 | |
e622f2f4 | 527 | priv->tx_wr.wr.wr_id = wr_id; |
10adcbd2 | 528 | priv->tx_wr.remote_qpn = dqpn; |
e622f2f4 | 529 | priv->tx_wr.ah = address; |
1da177e4 | 530 | |
40ca1988 | 531 | if (head) { |
e622f2f4 CH |
532 | priv->tx_wr.mss = skb_shinfo(skb)->gso_size; |
533 | priv->tx_wr.header = head; | |
534 | priv->tx_wr.hlen = hlen; | |
535 | priv->tx_wr.wr.opcode = IB_WR_LSO; | |
40ca1988 | 536 | } else |
e622f2f4 | 537 | priv->tx_wr.wr.opcode = IB_WR_SEND; |
40ca1988 | 538 | |
e622f2f4 | 539 | return ib_post_send(priv->qp, &priv->tx_wr.wr, &bad_wr); |
1da177e4 LT |
540 | } |
541 | ||
cd565b4b ES |
542 | int ipoib_send(struct net_device *dev, struct sk_buff *skb, |
543 | struct ib_ah *address, u32 dqpn) | |
1da177e4 | 544 | { |
c1048aff | 545 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1993d683 | 546 | struct ipoib_tx_buf *tx_req; |
a48f509b | 547 | int hlen, rc; |
40ca1988 | 548 | void *phead; |
78a50a5e | 549 | unsigned usable_sge = priv->max_send_sge - !!skb_headlen(skb); |
40ca1988 EC |
550 | |
551 | if (skb_is_gso(skb)) { | |
552 | hlen = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
553 | phead = skb->data; | |
554 | if (unlikely(!skb_pull(skb, hlen))) { | |
555 | ipoib_warn(priv, "linear data too small\n"); | |
556 | ++dev->stats.tx_dropped; | |
557 | ++dev->stats.tx_errors; | |
558 | dev_kfree_skb_any(skb); | |
cd565b4b | 559 | return -1; |
40ca1988 EC |
560 | } |
561 | } else { | |
562 | if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) { | |
563 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", | |
564 | skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN); | |
565 | ++dev->stats.tx_dropped; | |
566 | ++dev->stats.tx_errors; | |
567 | ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu); | |
cd565b4b | 568 | return -1; |
40ca1988 EC |
569 | } |
570 | phead = NULL; | |
571 | hlen = 0; | |
1da177e4 | 572 | } |
78a50a5e HWR |
573 | if (skb_shinfo(skb)->nr_frags > usable_sge) { |
574 | if (skb_linearize(skb) < 0) { | |
575 | ipoib_warn(priv, "skb could not be linearized\n"); | |
576 | ++dev->stats.tx_dropped; | |
577 | ++dev->stats.tx_errors; | |
578 | dev_kfree_skb_any(skb); | |
cd565b4b | 579 | return -1; |
78a50a5e HWR |
580 | } |
581 | /* Does skb_linearize return ok without reducing nr_frags? */ | |
582 | if (skb_shinfo(skb)->nr_frags > usable_sge) { | |
583 | ipoib_warn(priv, "too many frags after skb linearize\n"); | |
584 | ++dev->stats.tx_dropped; | |
585 | ++dev->stats.tx_errors; | |
586 | dev_kfree_skb_any(skb); | |
cd565b4b | 587 | return -1; |
78a50a5e HWR |
588 | } |
589 | } | |
1da177e4 | 590 | |
10adcbd2 ES |
591 | ipoib_dbg_data(priv, |
592 | "sending packet, length=%d address=%p dqpn=0x%06x\n", | |
593 | skb->len, address, dqpn); | |
1da177e4 LT |
594 | |
595 | /* | |
596 | * We put the skb into the tx_ring _before_ we call post_send() | |
597 | * because it's entirely possible that the completion handler will | |
598 | * run before we execute anything after the post_send(). That | |
599 | * means we have to make sure everything is properly recorded and | |
600 | * our state is consistent before we call post_send(). | |
601 | */ | |
0f485251 | 602 | tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)]; |
1da177e4 | 603 | tx_req->skb = skb; |
7143740d | 604 | if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) { |
de903512 | 605 | ++dev->stats.tx_errors; |
73fbe8be | 606 | dev_kfree_skb_any(skb); |
cd565b4b | 607 | return -1; |
73fbe8be | 608 | } |
1da177e4 | 609 | |
6046136c | 610 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
e622f2f4 | 611 | priv->tx_wr.wr.send_flags |= IB_SEND_IP_CSUM; |
6046136c | 612 | else |
e622f2f4 | 613 | priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM; |
6046136c | 614 | |
57ce41d1 EC |
615 | if (++priv->tx_outstanding == ipoib_sendq_size) { |
616 | ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); | |
617 | if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP)) | |
618 | ipoib_warn(priv, "request notify on send CQ failed\n"); | |
619 | netif_stop_queue(dev); | |
620 | } | |
621 | ||
7e5a90c2 SP |
622 | skb_orphan(skb); |
623 | skb_dst_drop(skb); | |
624 | ||
a48f509b | 625 | rc = post_send(priv, priv->tx_head & (ipoib_sendq_size - 1), |
cd565b4b | 626 | address, dqpn, tx_req, phead, hlen); |
a48f509b OG |
627 | if (unlikely(rc)) { |
628 | ipoib_warn(priv, "post_send failed, error %d\n", rc); | |
de903512 | 629 | ++dev->stats.tx_errors; |
57ce41d1 | 630 | --priv->tx_outstanding; |
c4268778 | 631 | ipoib_dma_unmap_tx(priv, tx_req); |
1da177e4 | 632 | dev_kfree_skb_any(skb); |
57ce41d1 EC |
633 | if (netif_queue_stopped(dev)) |
634 | netif_wake_queue(dev); | |
cd565b4b | 635 | rc = 0; |
1da177e4 | 636 | } else { |
860e9538 | 637 | netif_trans_update(dev); |
1da177e4 | 638 | |
cd565b4b | 639 | rc = priv->tx_head; |
1da177e4 | 640 | ++priv->tx_head; |
1da177e4 | 641 | } |
f56bcd80 EC |
642 | |
643 | if (unlikely(priv->tx_outstanding > MAX_SEND_CQE)) | |
57ce41d1 EC |
644 | while (poll_tx(priv)) |
645 | ; /* nothing */ | |
cd565b4b ES |
646 | |
647 | return rc; | |
1da177e4 LT |
648 | } |
649 | ||
650 | static void __ipoib_reap_ah(struct net_device *dev) | |
651 | { | |
c1048aff | 652 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 LT |
653 | struct ipoib_ah *ah, *tah; |
654 | LIST_HEAD(remove_list); | |
943c246e RD |
655 | unsigned long flags; |
656 | ||
657 | netif_tx_lock_bh(dev); | |
658 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 659 | |
1da177e4 | 660 | list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) |
2181858b | 661 | if ((int) priv->tx_tail - (int) ah->last_send >= 0) { |
1da177e4 | 662 | list_del(&ah->list); |
36523159 | 663 | rdma_destroy_ah(ah->ah); |
31c02e21 | 664 | kfree(ah); |
1da177e4 | 665 | } |
943c246e RD |
666 | |
667 | spin_unlock_irqrestore(&priv->lock, flags); | |
668 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
669 | } |
670 | ||
c4028958 | 671 | void ipoib_reap_ah(struct work_struct *work) |
1da177e4 | 672 | { |
c4028958 DH |
673 | struct ipoib_dev_priv *priv = |
674 | container_of(work, struct ipoib_dev_priv, ah_reap_task.work); | |
675 | struct net_device *dev = priv->dev; | |
1da177e4 LT |
676 | |
677 | __ipoib_reap_ah(dev); | |
678 | ||
679 | if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) | |
0b39578b | 680 | queue_delayed_work(priv->wq, &priv->ah_reap_task, |
69fc507a | 681 | round_jiffies_relative(HZ)); |
1da177e4 LT |
682 | } |
683 | ||
efc82eee | 684 | static void ipoib_flush_ah(struct net_device *dev) |
e135106f | 685 | { |
c1048aff | 686 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
e135106f DL |
687 | |
688 | cancel_delayed_work(&priv->ah_reap_task); | |
efc82eee | 689 | flush_workqueue(priv->wq); |
e135106f DL |
690 | ipoib_reap_ah(&priv->ah_reap_task.work); |
691 | } | |
692 | ||
efc82eee | 693 | static void ipoib_stop_ah(struct net_device *dev) |
e135106f | 694 | { |
c1048aff | 695 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
e135106f DL |
696 | |
697 | set_bit(IPOIB_STOP_REAPER, &priv->flags); | |
efc82eee | 698 | ipoib_flush_ah(dev); |
e135106f DL |
699 | } |
700 | ||
7ce1a3ee | 701 | static int recvs_pending(struct net_device *dev) |
57ce41d1 | 702 | { |
c1048aff | 703 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
7ce1a3ee ES |
704 | int pending = 0; |
705 | int i; | |
706 | ||
707 | for (i = 0; i < ipoib_recvq_size; ++i) | |
708 | if (priv->rx_ring[i].skb) | |
709 | ++pending; | |
710 | ||
711 | return pending; | |
57ce41d1 EC |
712 | } |
713 | ||
5dc78ad1 ES |
714 | static void check_qp_movement_and_print(struct ipoib_dev_priv *priv, |
715 | struct ib_qp *qp, | |
716 | enum ib_qp_state new_state) | |
717 | { | |
718 | struct ib_qp_attr qp_attr; | |
719 | struct ib_qp_init_attr query_init_attr; | |
720 | int ret; | |
721 | ||
722 | ret = ib_query_qp(qp, &qp_attr, IB_QP_STATE, &query_init_attr); | |
723 | if (ret) { | |
724 | ipoib_warn(priv, "%s: Failed to query QP\n", __func__); | |
725 | return; | |
726 | } | |
727 | /* print according to the new-state and the previous state.*/ | |
728 | if (new_state == IB_QPS_ERR && qp_attr.qp_state == IB_QPS_RESET) | |
729 | ipoib_dbg(priv, "Failed modify QP, IB_QPS_RESET to IB_QPS_ERR, acceptable\n"); | |
730 | else | |
731 | ipoib_warn(priv, "Failed to modify QP to state: %d from state: %d\n", | |
732 | new_state, qp_attr.qp_state); | |
733 | } | |
734 | ||
7ce1a3ee | 735 | int ipoib_ib_dev_stop_default(struct net_device *dev) |
1da177e4 | 736 | { |
c1048aff | 737 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
7ce1a3ee ES |
738 | struct ib_qp_attr qp_attr; |
739 | unsigned long begin; | |
740 | struct ipoib_tx_buf *tx_req; | |
741 | int i; | |
1da177e4 | 742 | |
cd565b4b | 743 | if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
7ce1a3ee | 744 | napi_disable(&priv->napi); |
dd57c930 | 745 | |
7ce1a3ee ES |
746 | ipoib_cm_dev_stop(dev); |
747 | ||
748 | /* | |
749 | * Move our QP to the error state and then reinitialize in | |
750 | * when all work requests have completed or have been flushed. | |
751 | */ | |
752 | qp_attr.qp_state = IB_QPS_ERR; | |
753 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) | |
5dc78ad1 | 754 | check_qp_movement_and_print(priv, priv->qp, IB_QPS_ERR); |
7ce1a3ee ES |
755 | |
756 | /* Wait for all sends and receives to complete */ | |
757 | begin = jiffies; | |
758 | ||
759 | while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) { | |
760 | if (time_after(jiffies, begin + 5 * HZ)) { | |
761 | ipoib_warn(priv, | |
762 | "timing out; %d sends %d receives not completed\n", | |
763 | priv->tx_head - priv->tx_tail, | |
764 | recvs_pending(dev)); | |
765 | ||
766 | /* | |
767 | * assume the HW is wedged and just free up | |
768 | * all our pending work requests. | |
769 | */ | |
770 | while ((int)priv->tx_tail - (int)priv->tx_head < 0) { | |
771 | tx_req = &priv->tx_ring[priv->tx_tail & | |
772 | (ipoib_sendq_size - 1)]; | |
773 | ipoib_dma_unmap_tx(priv, tx_req); | |
774 | dev_kfree_skb_any(tx_req->skb); | |
775 | ++priv->tx_tail; | |
776 | --priv->tx_outstanding; | |
777 | } | |
778 | ||
779 | for (i = 0; i < ipoib_recvq_size; ++i) { | |
780 | struct ipoib_rx_buf *rx_req; | |
781 | ||
782 | rx_req = &priv->rx_ring[i]; | |
783 | if (!rx_req->skb) | |
784 | continue; | |
785 | ipoib_ud_dma_unmap_rx(priv, | |
786 | priv->rx_ring[i].mapping); | |
787 | dev_kfree_skb_any(rx_req->skb); | |
788 | rx_req->skb = NULL; | |
789 | } | |
790 | ||
791 | goto timeout; | |
792 | } | |
793 | ||
794 | ipoib_drain_cq(dev); | |
795 | ||
98e77d9f | 796 | usleep_range(1000, 2000); |
26bbf13c | 797 | } |
26bbf13c | 798 | |
7ce1a3ee ES |
799 | ipoib_dbg(priv, "All sends and receives done.\n"); |
800 | ||
801 | timeout: | |
802 | del_timer_sync(&priv->poll_timer); | |
803 | qp_attr.qp_state = IB_QPS_RESET; | |
804 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) | |
805 | ipoib_warn(priv, "Failed to modify QP to RESET state\n"); | |
806 | ||
807 | ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP); | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | int ipoib_ib_dev_stop(struct net_device *dev) | |
813 | { | |
cd565b4b ES |
814 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
815 | ||
816 | priv->rn_ops->ndo_stop(dev); | |
7ce1a3ee | 817 | |
cd565b4b | 818 | clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
7ce1a3ee ES |
819 | ipoib_flush_ah(dev); |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | void ipoib_ib_tx_timer_func(unsigned long ctx) | |
825 | { | |
826 | drain_tx_cq((struct net_device *)ctx); | |
827 | } | |
828 | ||
829 | int ipoib_ib_dev_open_default(struct net_device *dev) | |
830 | { | |
c1048aff | 831 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
7ce1a3ee ES |
832 | int ret; |
833 | ||
5b6810e0 | 834 | ret = ipoib_init_qp(dev); |
1da177e4 | 835 | if (ret) { |
5b6810e0 | 836 | ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); |
1da177e4 LT |
837 | return -1; |
838 | } | |
839 | ||
840 | ret = ipoib_ib_post_receives(dev); | |
841 | if (ret) { | |
842 | ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); | |
cd565b4b | 843 | goto out; |
1da177e4 LT |
844 | } |
845 | ||
839fcaba MT |
846 | ret = ipoib_cm_dev_open(dev); |
847 | if (ret) { | |
24bd1e4e | 848 | ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret); |
cd565b4b | 849 | goto out; |
839fcaba MT |
850 | } |
851 | ||
cd565b4b | 852 | if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
e028cc55 | 853 | napi_enable(&priv->napi); |
7a343d4c | 854 | |
1da177e4 | 855 | return 0; |
cd565b4b | 856 | out: |
c2bb5628 | 857 | return -1; |
1da177e4 LT |
858 | } |
859 | ||
7ce1a3ee ES |
860 | int ipoib_ib_dev_open(struct net_device *dev) |
861 | { | |
c1048aff | 862 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
7ce1a3ee ES |
863 | |
864 | ipoib_pkey_dev_check_presence(dev); | |
865 | ||
866 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
867 | ipoib_warn(priv, "P_Key 0x%04x is %s\n", priv->pkey, | |
868 | (!(priv->pkey & 0x7fff) ? "Invalid" : "not found")); | |
869 | return -1; | |
870 | } | |
871 | ||
872 | clear_bit(IPOIB_STOP_REAPER, &priv->flags); | |
873 | queue_delayed_work(priv->wq, &priv->ah_reap_task, | |
874 | round_jiffies_relative(HZ)); | |
875 | ||
cd565b4b | 876 | if (priv->rn_ops->ndo_open(dev)) { |
7ce1a3ee | 877 | pr_warn("%s: Failed to open dev\n", dev->name); |
cd565b4b | 878 | goto dev_stop; |
7ce1a3ee ES |
879 | } |
880 | ||
cd565b4b ES |
881 | set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
882 | ||
7ce1a3ee ES |
883 | return 0; |
884 | ||
cd565b4b | 885 | dev_stop: |
7ce1a3ee ES |
886 | set_bit(IPOIB_STOP_REAPER, &priv->flags); |
887 | cancel_delayed_work(&priv->ah_reap_task); | |
cd565b4b | 888 | set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
cd565b4b | 889 | ipoib_ib_dev_stop(dev); |
7ce1a3ee ES |
890 | return -1; |
891 | } | |
892 | ||
db84f880 | 893 | void ipoib_pkey_dev_check_presence(struct net_device *dev) |
7a343d4c | 894 | { |
c1048aff | 895 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
7a343d4c | 896 | |
dd57c930 AE |
897 | if (!(priv->pkey & 0x7fff) || |
898 | ib_find_pkey(priv->ca, priv->port, priv->pkey, | |
899 | &priv->pkey_index)) | |
7a343d4c LA |
900 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); |
901 | else | |
902 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
903 | } | |
904 | ||
5c37077f | 905 | void ipoib_ib_dev_up(struct net_device *dev) |
1da177e4 | 906 | { |
c1048aff | 907 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 | 908 | |
7a343d4c LA |
909 | ipoib_pkey_dev_check_presence(dev); |
910 | ||
911 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
912 | ipoib_dbg(priv, "PKEY is not assigned.\n"); | |
5c37077f | 913 | return; |
7a343d4c LA |
914 | } |
915 | ||
1da177e4 LT |
916 | set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); |
917 | ||
5c37077f | 918 | ipoib_mcast_start_thread(dev); |
1da177e4 LT |
919 | } |
920 | ||
dfc0e555 | 921 | void ipoib_ib_dev_down(struct net_device *dev) |
1da177e4 | 922 | { |
c1048aff | 923 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 LT |
924 | |
925 | ipoib_dbg(priv, "downing ib_dev\n"); | |
926 | ||
927 | clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
928 | netif_carrier_off(dev); | |
929 | ||
efc82eee | 930 | ipoib_mcast_stop_thread(dev); |
1da177e4 LT |
931 | ipoib_mcast_dev_flush(dev); |
932 | ||
1da177e4 | 933 | ipoib_flush_paths(dev); |
1da177e4 LT |
934 | } |
935 | ||
2dfbfc37 MT |
936 | void ipoib_drain_cq(struct net_device *dev) |
937 | { | |
c1048aff | 938 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
2dfbfc37 | 939 | int i, n; |
943c246e RD |
940 | |
941 | /* | |
942 | * We call completion handling routines that expect to be | |
943 | * called from the BH-disabled NAPI poll context, so disable | |
944 | * BHs here too. | |
945 | */ | |
946 | local_bh_disable(); | |
947 | ||
2dfbfc37 | 948 | do { |
f56bcd80 | 949 | n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); |
2dfbfc37 | 950 | for (i = 0; i < n; ++i) { |
ce423ef5 RD |
951 | /* |
952 | * Convert any successful completions to flush | |
953 | * errors to avoid passing packets up the | |
954 | * stack after bringing the device down. | |
955 | */ | |
956 | if (priv->ibwc[i].status == IB_WC_SUCCESS) | |
957 | priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; | |
958 | ||
1b524963 MT |
959 | if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) { |
960 | if (priv->ibwc[i].wr_id & IPOIB_OP_CM) | |
961 | ipoib_cm_handle_rx_wc(dev, priv->ibwc + i); | |
962 | else | |
963 | ipoib_ib_handle_rx_wc(dev, priv->ibwc + i); | |
f56bcd80 EC |
964 | } else |
965 | ipoib_cm_handle_tx_wc(dev, priv->ibwc + i); | |
2dfbfc37 MT |
966 | } |
967 | } while (n == IPOIB_NUM_WC); | |
f56bcd80 EC |
968 | |
969 | while (poll_tx(priv)) | |
970 | ; /* nothing */ | |
943c246e RD |
971 | |
972 | local_bh_enable(); | |
2dfbfc37 MT |
973 | } |
974 | ||
c2904141 ES |
975 | /* |
976 | * Takes whatever value which is in pkey index 0 and updates priv->pkey | |
977 | * returns 0 if the pkey value was changed. | |
978 | */ | |
979 | static inline int update_parent_pkey(struct ipoib_dev_priv *priv) | |
980 | { | |
981 | int result; | |
982 | u16 prev_pkey; | |
983 | ||
984 | prev_pkey = priv->pkey; | |
985 | result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey); | |
986 | if (result) { | |
987 | ipoib_warn(priv, "ib_query_pkey port %d failed (ret = %d)\n", | |
988 | priv->port, result); | |
989 | return result; | |
990 | } | |
991 | ||
992 | priv->pkey |= 0x8000; | |
993 | ||
994 | if (prev_pkey != priv->pkey) { | |
995 | ipoib_dbg(priv, "pkey changed from 0x%x to 0x%x\n", | |
996 | prev_pkey, priv->pkey); | |
997 | /* | |
998 | * Update the pkey in the broadcast address, while making sure to set | |
999 | * the full membership bit, so that we join the right broadcast group. | |
1000 | */ | |
1001 | priv->dev->broadcast[8] = priv->pkey >> 8; | |
1002 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
9a9b8112 FD |
1003 | |
1004 | /* | |
1005 | * Update the broadcast address in the priv->broadcast object, | |
1006 | * in case it already exists, otherwise no one will do that. | |
1007 | */ | |
1008 | if (priv->broadcast) { | |
1009 | spin_lock_irq(&priv->lock); | |
1010 | memcpy(priv->broadcast->mcmember.mgid.raw, | |
1011 | priv->dev->broadcast + 4, | |
1012 | sizeof(union ib_gid)); | |
1013 | spin_unlock_irq(&priv->lock); | |
1014 | } | |
1015 | ||
c2904141 ES |
1016 | return 0; |
1017 | } | |
1018 | ||
1019 | return 1; | |
1020 | } | |
dd57c930 AE |
1021 | /* |
1022 | * returns 0 if pkey value was found in a different slot. | |
1023 | */ | |
1024 | static inline int update_child_pkey(struct ipoib_dev_priv *priv) | |
1025 | { | |
1026 | u16 old_index = priv->pkey_index; | |
1027 | ||
1028 | priv->pkey_index = 0; | |
1029 | ipoib_pkey_dev_check_presence(priv->dev); | |
1030 | ||
1031 | if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) && | |
1032 | (old_index == priv->pkey_index)) | |
1033 | return 1; | |
1034 | return 0; | |
1035 | } | |
c2904141 | 1036 | |
492a7e67 MB |
1037 | /* |
1038 | * returns true if the device address of the ipoib interface has changed and the | |
1039 | * new address is a valid one (i.e in the gid table), return false otherwise. | |
1040 | */ | |
1041 | static bool ipoib_dev_addr_changed_valid(struct ipoib_dev_priv *priv) | |
1042 | { | |
1043 | union ib_gid search_gid; | |
1044 | union ib_gid gid0; | |
1045 | union ib_gid *netdev_gid; | |
1046 | int err; | |
1047 | u16 index; | |
1048 | u8 port; | |
1049 | bool ret = false; | |
1050 | ||
1051 | netdev_gid = (union ib_gid *)(priv->dev->dev_addr + 4); | |
1052 | if (ib_query_gid(priv->ca, priv->port, 0, &gid0, NULL)) | |
1053 | return false; | |
1054 | ||
9b29953b | 1055 | netif_addr_lock_bh(priv->dev); |
492a7e67 MB |
1056 | |
1057 | /* The subnet prefix may have changed, update it now so we won't have | |
1058 | * to do it later | |
1059 | */ | |
1060 | priv->local_gid.global.subnet_prefix = gid0.global.subnet_prefix; | |
1061 | netdev_gid->global.subnet_prefix = gid0.global.subnet_prefix; | |
1062 | search_gid.global.subnet_prefix = gid0.global.subnet_prefix; | |
1063 | ||
1064 | search_gid.global.interface_id = priv->local_gid.global.interface_id; | |
1065 | ||
9b29953b | 1066 | netif_addr_unlock_bh(priv->dev); |
492a7e67 MB |
1067 | |
1068 | err = ib_find_gid(priv->ca, &search_gid, IB_GID_TYPE_IB, | |
1069 | priv->dev, &port, &index); | |
1070 | ||
9b29953b | 1071 | netif_addr_lock_bh(priv->dev); |
492a7e67 MB |
1072 | |
1073 | if (search_gid.global.interface_id != | |
1074 | priv->local_gid.global.interface_id) | |
1075 | /* There was a change while we were looking up the gid, bail | |
1076 | * here and let the next work sort this out | |
1077 | */ | |
1078 | goto out; | |
1079 | ||
1080 | /* The next section of code needs some background: | |
1081 | * Per IB spec the port GUID can't change if the HCA is powered on. | |
1082 | * port GUID is the basis for GID at index 0 which is the basis for | |
1083 | * the default device address of a ipoib interface. | |
1084 | * | |
1085 | * so it seems the flow should be: | |
1086 | * if user_changed_dev_addr && gid in gid tbl | |
1087 | * set bit dev_addr_set | |
1088 | * return true | |
1089 | * else | |
1090 | * return false | |
1091 | * | |
1092 | * The issue is that there are devices that don't follow the spec, | |
1093 | * they change the port GUID when the HCA is powered, so in order | |
1094 | * not to break userspace applications, We need to check if the | |
1095 | * user wanted to control the device address and we assume that | |
1096 | * if he sets the device address back to be based on GID index 0, | |
1097 | * he no longer wishs to control it. | |
1098 | * | |
1099 | * If the user doesn't control the the device address, | |
1100 | * IPOIB_FLAG_DEV_ADDR_SET is set and ib_find_gid failed it means | |
1101 | * the port GUID has changed and GID at index 0 has changed | |
1102 | * so we need to change priv->local_gid and priv->dev->dev_addr | |
1103 | * to reflect the new GID. | |
1104 | */ | |
1105 | if (!test_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags)) { | |
1106 | if (!err && port == priv->port) { | |
1107 | set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags); | |
1108 | if (index == 0) | |
1109 | clear_bit(IPOIB_FLAG_DEV_ADDR_CTRL, | |
1110 | &priv->flags); | |
1111 | else | |
1112 | set_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags); | |
1113 | ret = true; | |
1114 | } else { | |
1115 | ret = false; | |
1116 | } | |
1117 | } else { | |
1118 | if (!err && port == priv->port) { | |
1119 | ret = true; | |
1120 | } else { | |
1121 | if (!test_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags)) { | |
1122 | memcpy(&priv->local_gid, &gid0, | |
1123 | sizeof(priv->local_gid)); | |
1124 | memcpy(priv->dev->dev_addr + 4, &gid0, | |
1125 | sizeof(priv->local_gid)); | |
1126 | ret = true; | |
1127 | } | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | out: | |
9b29953b | 1132 | netif_addr_unlock_bh(priv->dev); |
492a7e67 MB |
1133 | |
1134 | return ret; | |
1135 | } | |
1136 | ||
ee1e2c82 | 1137 | static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, |
8b7cce0d HE |
1138 | enum ipoib_flush_level level, |
1139 | int nesting) | |
1da177e4 | 1140 | { |
26bbf13c | 1141 | struct ipoib_dev_priv *cpriv; |
c4028958 | 1142 | struct net_device *dev = priv->dev; |
c2904141 | 1143 | int result; |
26bbf13c | 1144 | |
8b7cce0d | 1145 | down_read_nested(&priv->vlan_rwsem, nesting); |
1da177e4 | 1146 | |
26bbf13c YE |
1147 | /* |
1148 | * Flush any child interfaces too -- they might be up even if | |
1149 | * the parent is down. | |
1150 | */ | |
1151 | list_for_each_entry(cpriv, &priv->child_intfs, list) | |
8b7cce0d | 1152 | __ipoib_ib_dev_flush(cpriv, level, nesting + 1); |
26bbf13c | 1153 | |
f47944cc | 1154 | up_read(&priv->vlan_rwsem); |
26bbf13c | 1155 | |
dd57c930 AE |
1156 | if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) && |
1157 | level != IPOIB_FLUSH_HEAVY) { | |
492a7e67 MB |
1158 | /* Make sure the dev_addr is set even if not flushing */ |
1159 | if (level == IPOIB_FLUSH_LIGHT) | |
1160 | ipoib_dev_addr_changed_valid(priv); | |
7a343d4c LA |
1161 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); |
1162 | return; | |
1163 | } | |
1164 | ||
1165 | if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { | |
dd57c930 AE |
1166 | /* interface is down. update pkey and leave. */ |
1167 | if (level == IPOIB_FLUSH_HEAVY) { | |
1168 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) | |
1169 | update_parent_pkey(priv); | |
1170 | else | |
1171 | update_child_pkey(priv); | |
492a7e67 MB |
1172 | } else if (level == IPOIB_FLUSH_LIGHT) |
1173 | ipoib_dev_addr_changed_valid(priv); | |
7a343d4c | 1174 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); |
1da177e4 | 1175 | return; |
7a343d4c | 1176 | } |
1da177e4 | 1177 | |
ee1e2c82 | 1178 | if (level == IPOIB_FLUSH_HEAVY) { |
c2904141 ES |
1179 | /* child devices chase their origin pkey value, while non-child |
1180 | * (parent) devices should always takes what present in pkey index 0 | |
1181 | */ | |
1182 | if (test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
dd57c930 AE |
1183 | result = update_child_pkey(priv); |
1184 | if (result) { | |
1185 | /* restart QP only if P_Key index is changed */ | |
c2904141 | 1186 | ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); |
9fdd5e5b | 1187 | return; |
c2904141 | 1188 | } |
dd57c930 | 1189 | |
c2904141 ES |
1190 | } else { |
1191 | result = update_parent_pkey(priv); | |
1192 | /* restart QP only if P_Key value changed */ | |
1193 | if (result) { | |
1194 | ipoib_dbg(priv, "Not flushing - P_Key value not changed.\n"); | |
1195 | return; | |
1196 | } | |
26bbf13c | 1197 | } |
26bbf13c YE |
1198 | } |
1199 | ||
ee1e2c82 | 1200 | if (level == IPOIB_FLUSH_LIGHT) { |
344bacca | 1201 | int oper_up; |
ee1e2c82 | 1202 | ipoib_mark_paths_invalid(dev); |
344bacca AV |
1203 | /* Set IPoIB operation as down to prevent races between: |
1204 | * the flush flow which leaves MCG and on the fly joins | |
1205 | * which can happen during that time. mcast restart task | |
1206 | * should deal with join requests we missed. | |
1207 | */ | |
1208 | oper_up = test_and_clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
ee1e2c82 | 1209 | ipoib_mcast_dev_flush(dev); |
344bacca AV |
1210 | if (oper_up) |
1211 | set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
efc82eee | 1212 | ipoib_flush_ah(dev); |
ee1e2c82 | 1213 | } |
1da177e4 | 1214 | |
ee1e2c82 | 1215 | if (level >= IPOIB_FLUSH_NORMAL) |
efc82eee | 1216 | ipoib_ib_dev_down(dev); |
1da177e4 | 1217 | |
ee1e2c82 | 1218 | if (level == IPOIB_FLUSH_HEAVY) { |
dd57c930 | 1219 | if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
efc82eee DL |
1220 | ipoib_ib_dev_stop(dev); |
1221 | if (ipoib_ib_dev_open(dev) != 0) | |
dd57c930 AE |
1222 | return; |
1223 | if (netif_queue_stopped(dev)) | |
1224 | netif_start_queue(dev); | |
26bbf13c YE |
1225 | } |
1226 | ||
1da177e4 LT |
1227 | /* |
1228 | * The device could have been brought down between the start and when | |
1229 | * we get here, don't bring it back up if it's not configured up | |
1230 | */ | |
5ccd0255 | 1231 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { |
ee1e2c82 MS |
1232 | if (level >= IPOIB_FLUSH_NORMAL) |
1233 | ipoib_ib_dev_up(dev); | |
492a7e67 MB |
1234 | if (ipoib_dev_addr_changed_valid(priv)) |
1235 | ipoib_mcast_restart_task(&priv->restart_task); | |
5ccd0255 | 1236 | } |
26bbf13c | 1237 | } |
1da177e4 | 1238 | |
ee1e2c82 MS |
1239 | void ipoib_ib_dev_flush_light(struct work_struct *work) |
1240 | { | |
1241 | struct ipoib_dev_priv *priv = | |
1242 | container_of(work, struct ipoib_dev_priv, flush_light); | |
1243 | ||
8b7cce0d | 1244 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT, 0); |
ee1e2c82 MS |
1245 | } |
1246 | ||
1247 | void ipoib_ib_dev_flush_normal(struct work_struct *work) | |
26bbf13c YE |
1248 | { |
1249 | struct ipoib_dev_priv *priv = | |
ee1e2c82 | 1250 | container_of(work, struct ipoib_dev_priv, flush_normal); |
4f71055a | 1251 | |
8b7cce0d | 1252 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL, 0); |
26bbf13c | 1253 | } |
4f71055a | 1254 | |
ee1e2c82 | 1255 | void ipoib_ib_dev_flush_heavy(struct work_struct *work) |
26bbf13c YE |
1256 | { |
1257 | struct ipoib_dev_priv *priv = | |
ee1e2c82 | 1258 | container_of(work, struct ipoib_dev_priv, flush_heavy); |
26bbf13c | 1259 | |
8b7cce0d | 1260 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY, 0); |
1da177e4 LT |
1261 | } |
1262 | ||
1263 | void ipoib_ib_dev_cleanup(struct net_device *dev) | |
1264 | { | |
c1048aff | 1265 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 LT |
1266 | |
1267 | ipoib_dbg(priv, "cleaning up ib_dev\n"); | |
a39c52ab ES |
1268 | /* |
1269 | * We must make sure there are no more (path) completions | |
1270 | * that may wish to touch priv fields that are no longer valid | |
1271 | */ | |
1272 | ipoib_flush_paths(dev); | |
1da177e4 | 1273 | |
efc82eee | 1274 | ipoib_mcast_stop_thread(dev); |
988bd503 | 1275 | ipoib_mcast_dev_flush(dev); |
1da177e4 | 1276 | |
e135106f DL |
1277 | /* |
1278 | * All of our ah references aren't free until after | |
1279 | * ipoib_mcast_dev_flush(), ipoib_flush_paths, and | |
1280 | * the neighbor garbage collection is stopped and reaped. | |
1281 | * That should all be done now, so make a final ah flush. | |
1282 | */ | |
efc82eee | 1283 | ipoib_stop_ah(dev); |
e135106f | 1284 | |
515ed4f3 ES |
1285 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); |
1286 | ||
cd565b4b | 1287 | priv->rn_ops->ndo_uninit(dev); |
1da177e4 | 1288 | |
515ed4f3 ES |
1289 | if (priv->pd) { |
1290 | ib_dealloc_pd(priv->pd); | |
1291 | priv->pd = NULL; | |
1292 | } | |
1293 | } | |
1da177e4 | 1294 |