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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) | |
b04dc199 AH |
195 | ipoib_warn(priv, |
196 | "failed recv event (status=%d, wrid=%d vend_err %#x)\n", | |
2439a6e6 | 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 | ||
8966e28d | 267 | napi_gro_receive(&priv->recv_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; |
8966e28d ES |
409 | |
410 | if (unlikely(netif_queue_stopped(dev) && | |
411 | ((priv->tx_head - priv->tx_tail) <= ipoib_sendq_size >> 1) && | |
412 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))) | |
2439a6e6 | 413 | netif_wake_queue(dev); |
2439a6e6 RD |
414 | |
415 | if (wc->status != IB_WC_SUCCESS && | |
2c010730 ES |
416 | wc->status != IB_WC_WR_FLUSH_ERR) { |
417 | struct ipoib_qp_state_validate *qp_work; | |
b04dc199 AH |
418 | ipoib_warn(priv, |
419 | "failed send event (status=%d, wrid=%d vend_err %#x)\n", | |
2439a6e6 | 420 | wc->status, wr_id, wc->vendor_err); |
2c010730 | 421 | qp_work = kzalloc(sizeof(*qp_work), GFP_ATOMIC); |
74226649 | 422 | if (!qp_work) |
2c010730 | 423 | return; |
2c010730 ES |
424 | |
425 | INIT_WORK(&qp_work->work, ipoib_qp_state_validate_work); | |
426 | qp_work->priv = priv; | |
427 | queue_work(priv->wq, &qp_work->work); | |
428 | } | |
2439a6e6 RD |
429 | } |
430 | ||
f56bcd80 EC |
431 | static int poll_tx(struct ipoib_dev_priv *priv) |
432 | { | |
433 | int n, i; | |
8966e28d | 434 | struct ib_wc *wc; |
f56bcd80 EC |
435 | |
436 | n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc); | |
8966e28d ES |
437 | for (i = 0; i < n; ++i) { |
438 | wc = priv->send_wc + i; | |
439 | if (wc->wr_id & IPOIB_OP_CM) | |
440 | ipoib_cm_handle_tx_wc(priv->dev, priv->send_wc + i); | |
441 | else | |
442 | ipoib_ib_handle_tx_wc(priv->dev, priv->send_wc + i); | |
443 | } | |
f56bcd80 EC |
444 | return n == MAX_SEND_CQE; |
445 | } | |
446 | ||
8966e28d | 447 | int ipoib_rx_poll(struct napi_struct *napi, int budget) |
2439a6e6 | 448 | { |
8966e28d ES |
449 | struct ipoib_dev_priv *priv = |
450 | container_of(napi, struct ipoib_dev_priv, recv_napi); | |
bea3348e | 451 | struct net_device *dev = priv->dev; |
8d1cc86a RD |
452 | int done; |
453 | int t; | |
8d1cc86a RD |
454 | int n, i; |
455 | ||
456 | done = 0; | |
8d1cc86a | 457 | |
bea3348e SH |
458 | poll_more: |
459 | while (done < budget) { | |
460 | int max = (budget - done); | |
461 | ||
8d1cc86a | 462 | t = min(IPOIB_NUM_WC, max); |
f56bcd80 | 463 | n = ib_poll_cq(priv->recv_cq, t, priv->ibwc); |
8d1cc86a | 464 | |
bea3348e | 465 | for (i = 0; i < n; i++) { |
8d1cc86a RD |
466 | struct ib_wc *wc = priv->ibwc + i; |
467 | ||
1b524963 | 468 | if (wc->wr_id & IPOIB_OP_RECV) { |
8d1cc86a | 469 | ++done; |
1b524963 MT |
470 | if (wc->wr_id & IPOIB_OP_CM) |
471 | ipoib_cm_handle_rx_wc(dev, wc); | |
472 | else | |
473 | ipoib_ib_handle_rx_wc(dev, wc); | |
8966e28d ES |
474 | } else { |
475 | pr_warn("%s: Got unexpected wqe id\n", __func__); | |
476 | } | |
8d1cc86a RD |
477 | } |
478 | ||
bea3348e | 479 | if (n != t) |
8d1cc86a | 480 | break; |
8d1cc86a RD |
481 | } |
482 | ||
bea3348e | 483 | if (done < budget) { |
288379f0 | 484 | napi_complete(napi); |
f56bcd80 | 485 | if (unlikely(ib_req_notify_cq(priv->recv_cq, |
8d1cc86a RD |
486 | IB_CQ_NEXT_COMP | |
487 | IB_CQ_REPORT_MISSED_EVENTS)) && | |
288379f0 | 488 | napi_reschedule(napi)) |
bea3348e | 489 | goto poll_more; |
8d1cc86a RD |
490 | } |
491 | ||
bea3348e | 492 | return done; |
1da177e4 LT |
493 | } |
494 | ||
8966e28d | 495 | int ipoib_tx_poll(struct napi_struct *napi, int budget) |
1da177e4 | 496 | { |
8966e28d ES |
497 | struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, |
498 | send_napi); | |
499 | struct net_device *dev = priv->dev; | |
500 | int n, i; | |
501 | struct ib_wc *wc; | |
bea3348e | 502 | |
8966e28d ES |
503 | poll_more: |
504 | n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc); | |
1da177e4 | 505 | |
8966e28d ES |
506 | for (i = 0; i < n; i++) { |
507 | wc = priv->send_wc + i; | |
508 | if (wc->wr_id & IPOIB_OP_CM) | |
509 | ipoib_cm_handle_tx_wc(dev, wc); | |
510 | else | |
511 | ipoib_ib_handle_tx_wc(dev, wc); | |
512 | } | |
57ce41d1 | 513 | |
8966e28d ES |
514 | if (n < budget) { |
515 | napi_complete(napi); | |
516 | if (unlikely(ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP | | |
517 | IB_CQ_REPORT_MISSED_EVENTS)) && | |
518 | napi_reschedule(napi)) | |
519 | goto poll_more; | |
520 | } | |
521 | return n < 0 ? 0 : n; | |
522 | } | |
57ce41d1 | 523 | |
8966e28d ES |
524 | void ipoib_ib_rx_completion(struct ib_cq *cq, void *ctx_ptr) |
525 | { | |
526 | struct ipoib_dev_priv *priv = ctx_ptr; | |
57ce41d1 | 527 | |
8966e28d | 528 | napi_schedule(&priv->recv_napi); |
57ce41d1 EC |
529 | } |
530 | ||
8966e28d | 531 | void ipoib_ib_tx_completion(struct ib_cq *cq, void *ctx_ptr) |
57ce41d1 | 532 | { |
8966e28d | 533 | struct ipoib_dev_priv *priv = ctx_ptr; |
943c246e | 534 | |
8966e28d | 535 | napi_schedule(&priv->send_napi); |
57ce41d1 EC |
536 | } |
537 | ||
1da177e4 LT |
538 | static inline int post_send(struct ipoib_dev_priv *priv, |
539 | unsigned int wr_id, | |
10adcbd2 | 540 | struct ib_ah *address, u32 dqpn, |
40ca1988 EC |
541 | struct ipoib_tx_buf *tx_req, |
542 | void *head, int hlen) | |
1da177e4 LT |
543 | { |
544 | struct ib_send_wr *bad_wr; | |
40ca1988 | 545 | struct sk_buff *skb = tx_req->skb; |
40ca1988 | 546 | |
c4268778 | 547 | ipoib_build_sge(priv, tx_req); |
1da177e4 | 548 | |
e622f2f4 | 549 | priv->tx_wr.wr.wr_id = wr_id; |
10adcbd2 | 550 | priv->tx_wr.remote_qpn = dqpn; |
e622f2f4 | 551 | priv->tx_wr.ah = address; |
1da177e4 | 552 | |
40ca1988 | 553 | if (head) { |
e622f2f4 CH |
554 | priv->tx_wr.mss = skb_shinfo(skb)->gso_size; |
555 | priv->tx_wr.header = head; | |
556 | priv->tx_wr.hlen = hlen; | |
557 | priv->tx_wr.wr.opcode = IB_WR_LSO; | |
40ca1988 | 558 | } else |
e622f2f4 | 559 | priv->tx_wr.wr.opcode = IB_WR_SEND; |
40ca1988 | 560 | |
e622f2f4 | 561 | return ib_post_send(priv->qp, &priv->tx_wr.wr, &bad_wr); |
1da177e4 LT |
562 | } |
563 | ||
cd565b4b ES |
564 | int ipoib_send(struct net_device *dev, struct sk_buff *skb, |
565 | struct ib_ah *address, u32 dqpn) | |
1da177e4 | 566 | { |
c1048aff | 567 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1993d683 | 568 | struct ipoib_tx_buf *tx_req; |
a48f509b | 569 | int hlen, rc; |
40ca1988 | 570 | void *phead; |
78a50a5e | 571 | unsigned usable_sge = priv->max_send_sge - !!skb_headlen(skb); |
40ca1988 EC |
572 | |
573 | if (skb_is_gso(skb)) { | |
574 | hlen = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
575 | phead = skb->data; | |
576 | if (unlikely(!skb_pull(skb, hlen))) { | |
577 | ipoib_warn(priv, "linear data too small\n"); | |
578 | ++dev->stats.tx_dropped; | |
579 | ++dev->stats.tx_errors; | |
580 | dev_kfree_skb_any(skb); | |
cd565b4b | 581 | return -1; |
40ca1988 EC |
582 | } |
583 | } else { | |
584 | if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) { | |
585 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", | |
586 | skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN); | |
587 | ++dev->stats.tx_dropped; | |
588 | ++dev->stats.tx_errors; | |
589 | ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu); | |
cd565b4b | 590 | return -1; |
40ca1988 EC |
591 | } |
592 | phead = NULL; | |
593 | hlen = 0; | |
1da177e4 | 594 | } |
78a50a5e HWR |
595 | if (skb_shinfo(skb)->nr_frags > usable_sge) { |
596 | if (skb_linearize(skb) < 0) { | |
597 | ipoib_warn(priv, "skb could not be linearized\n"); | |
598 | ++dev->stats.tx_dropped; | |
599 | ++dev->stats.tx_errors; | |
600 | dev_kfree_skb_any(skb); | |
cd565b4b | 601 | return -1; |
78a50a5e HWR |
602 | } |
603 | /* Does skb_linearize return ok without reducing nr_frags? */ | |
604 | if (skb_shinfo(skb)->nr_frags > usable_sge) { | |
605 | ipoib_warn(priv, "too many frags after skb linearize\n"); | |
606 | ++dev->stats.tx_dropped; | |
607 | ++dev->stats.tx_errors; | |
608 | dev_kfree_skb_any(skb); | |
cd565b4b | 609 | return -1; |
78a50a5e HWR |
610 | } |
611 | } | |
1da177e4 | 612 | |
10adcbd2 ES |
613 | ipoib_dbg_data(priv, |
614 | "sending packet, length=%d address=%p dqpn=0x%06x\n", | |
615 | skb->len, address, dqpn); | |
1da177e4 LT |
616 | |
617 | /* | |
618 | * We put the skb into the tx_ring _before_ we call post_send() | |
619 | * because it's entirely possible that the completion handler will | |
620 | * run before we execute anything after the post_send(). That | |
621 | * means we have to make sure everything is properly recorded and | |
622 | * our state is consistent before we call post_send(). | |
623 | */ | |
0f485251 | 624 | tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)]; |
1da177e4 | 625 | tx_req->skb = skb; |
7143740d | 626 | if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) { |
de903512 | 627 | ++dev->stats.tx_errors; |
73fbe8be | 628 | dev_kfree_skb_any(skb); |
cd565b4b | 629 | return -1; |
73fbe8be | 630 | } |
1da177e4 | 631 | |
6046136c | 632 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
e622f2f4 | 633 | priv->tx_wr.wr.send_flags |= IB_SEND_IP_CSUM; |
6046136c | 634 | else |
e622f2f4 | 635 | priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM; |
2c104ea6 ES |
636 | /* increase the tx_head after send success, but use it for queue state */ |
637 | if (priv->tx_head - priv->tx_tail == ipoib_sendq_size - 1) { | |
57ce41d1 | 638 | ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); |
57ce41d1 EC |
639 | netif_stop_queue(dev); |
640 | } | |
641 | ||
7e5a90c2 SP |
642 | skb_orphan(skb); |
643 | skb_dst_drop(skb); | |
644 | ||
8966e28d ES |
645 | if (netif_queue_stopped(dev)) |
646 | if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP | | |
647 | IB_CQ_REPORT_MISSED_EVENTS)) | |
648 | ipoib_warn(priv, "request notify on send CQ failed\n"); | |
649 | ||
a48f509b | 650 | rc = post_send(priv, priv->tx_head & (ipoib_sendq_size - 1), |
cd565b4b | 651 | address, dqpn, tx_req, phead, hlen); |
a48f509b OG |
652 | if (unlikely(rc)) { |
653 | ipoib_warn(priv, "post_send failed, error %d\n", rc); | |
de903512 | 654 | ++dev->stats.tx_errors; |
c4268778 | 655 | ipoib_dma_unmap_tx(priv, tx_req); |
1da177e4 | 656 | dev_kfree_skb_any(skb); |
57ce41d1 EC |
657 | if (netif_queue_stopped(dev)) |
658 | netif_wake_queue(dev); | |
cd565b4b | 659 | rc = 0; |
1da177e4 | 660 | } else { |
860e9538 | 661 | netif_trans_update(dev); |
1da177e4 | 662 | |
cd565b4b | 663 | rc = priv->tx_head; |
1da177e4 | 664 | ++priv->tx_head; |
1da177e4 | 665 | } |
cd565b4b | 666 | return rc; |
1da177e4 LT |
667 | } |
668 | ||
669 | static void __ipoib_reap_ah(struct net_device *dev) | |
670 | { | |
c1048aff | 671 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 LT |
672 | struct ipoib_ah *ah, *tah; |
673 | LIST_HEAD(remove_list); | |
943c246e RD |
674 | unsigned long flags; |
675 | ||
676 | netif_tx_lock_bh(dev); | |
677 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 678 | |
1da177e4 | 679 | list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) |
2181858b | 680 | if ((int) priv->tx_tail - (int) ah->last_send >= 0) { |
1da177e4 | 681 | list_del(&ah->list); |
36523159 | 682 | rdma_destroy_ah(ah->ah); |
31c02e21 | 683 | kfree(ah); |
1da177e4 | 684 | } |
943c246e RD |
685 | |
686 | spin_unlock_irqrestore(&priv->lock, flags); | |
687 | netif_tx_unlock_bh(dev); | |
1da177e4 LT |
688 | } |
689 | ||
c4028958 | 690 | void ipoib_reap_ah(struct work_struct *work) |
1da177e4 | 691 | { |
c4028958 DH |
692 | struct ipoib_dev_priv *priv = |
693 | container_of(work, struct ipoib_dev_priv, ah_reap_task.work); | |
694 | struct net_device *dev = priv->dev; | |
1da177e4 LT |
695 | |
696 | __ipoib_reap_ah(dev); | |
697 | ||
698 | if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) | |
0b39578b | 699 | queue_delayed_work(priv->wq, &priv->ah_reap_task, |
69fc507a | 700 | round_jiffies_relative(HZ)); |
1da177e4 LT |
701 | } |
702 | ||
efc82eee | 703 | static void ipoib_flush_ah(struct net_device *dev) |
e135106f | 704 | { |
c1048aff | 705 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
e135106f DL |
706 | |
707 | cancel_delayed_work(&priv->ah_reap_task); | |
efc82eee | 708 | flush_workqueue(priv->wq); |
e135106f DL |
709 | ipoib_reap_ah(&priv->ah_reap_task.work); |
710 | } | |
711 | ||
efc82eee | 712 | static void ipoib_stop_ah(struct net_device *dev) |
e135106f | 713 | { |
c1048aff | 714 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
e135106f DL |
715 | |
716 | set_bit(IPOIB_STOP_REAPER, &priv->flags); | |
efc82eee | 717 | ipoib_flush_ah(dev); |
e135106f DL |
718 | } |
719 | ||
7ce1a3ee | 720 | static int recvs_pending(struct net_device *dev) |
57ce41d1 | 721 | { |
c1048aff | 722 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
7ce1a3ee ES |
723 | int pending = 0; |
724 | int i; | |
725 | ||
726 | for (i = 0; i < ipoib_recvq_size; ++i) | |
727 | if (priv->rx_ring[i].skb) | |
728 | ++pending; | |
729 | ||
730 | return pending; | |
57ce41d1 EC |
731 | } |
732 | ||
5dc78ad1 ES |
733 | static void check_qp_movement_and_print(struct ipoib_dev_priv *priv, |
734 | struct ib_qp *qp, | |
735 | enum ib_qp_state new_state) | |
736 | { | |
737 | struct ib_qp_attr qp_attr; | |
738 | struct ib_qp_init_attr query_init_attr; | |
739 | int ret; | |
740 | ||
741 | ret = ib_query_qp(qp, &qp_attr, IB_QP_STATE, &query_init_attr); | |
742 | if (ret) { | |
743 | ipoib_warn(priv, "%s: Failed to query QP\n", __func__); | |
744 | return; | |
745 | } | |
746 | /* print according to the new-state and the previous state.*/ | |
747 | if (new_state == IB_QPS_ERR && qp_attr.qp_state == IB_QPS_RESET) | |
748 | ipoib_dbg(priv, "Failed modify QP, IB_QPS_RESET to IB_QPS_ERR, acceptable\n"); | |
749 | else | |
750 | ipoib_warn(priv, "Failed to modify QP to state: %d from state: %d\n", | |
751 | new_state, qp_attr.qp_state); | |
752 | } | |
753 | ||
8966e28d ES |
754 | static void ipoib_napi_enable(struct net_device *dev) |
755 | { | |
756 | struct ipoib_dev_priv *priv = ipoib_priv(dev); | |
757 | ||
758 | napi_enable(&priv->recv_napi); | |
759 | napi_enable(&priv->send_napi); | |
760 | } | |
761 | ||
762 | static void ipoib_napi_disable(struct net_device *dev) | |
763 | { | |
764 | struct ipoib_dev_priv *priv = ipoib_priv(dev); | |
765 | ||
766 | napi_disable(&priv->recv_napi); | |
767 | napi_disable(&priv->send_napi); | |
768 | } | |
769 | ||
7ce1a3ee | 770 | int ipoib_ib_dev_stop_default(struct net_device *dev) |
1da177e4 | 771 | { |
c1048aff | 772 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
7ce1a3ee ES |
773 | struct ib_qp_attr qp_attr; |
774 | unsigned long begin; | |
775 | struct ipoib_tx_buf *tx_req; | |
776 | int i; | |
1da177e4 | 777 | |
cd565b4b | 778 | if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
8966e28d | 779 | ipoib_napi_disable(dev); |
dd57c930 | 780 | |
7ce1a3ee ES |
781 | ipoib_cm_dev_stop(dev); |
782 | ||
783 | /* | |
784 | * Move our QP to the error state and then reinitialize in | |
785 | * when all work requests have completed or have been flushed. | |
786 | */ | |
787 | qp_attr.qp_state = IB_QPS_ERR; | |
788 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) | |
5dc78ad1 | 789 | check_qp_movement_and_print(priv, priv->qp, IB_QPS_ERR); |
7ce1a3ee ES |
790 | |
791 | /* Wait for all sends and receives to complete */ | |
792 | begin = jiffies; | |
793 | ||
794 | while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) { | |
795 | if (time_after(jiffies, begin + 5 * HZ)) { | |
796 | ipoib_warn(priv, | |
797 | "timing out; %d sends %d receives not completed\n", | |
798 | priv->tx_head - priv->tx_tail, | |
799 | recvs_pending(dev)); | |
800 | ||
801 | /* | |
802 | * assume the HW is wedged and just free up | |
803 | * all our pending work requests. | |
804 | */ | |
805 | while ((int)priv->tx_tail - (int)priv->tx_head < 0) { | |
806 | tx_req = &priv->tx_ring[priv->tx_tail & | |
807 | (ipoib_sendq_size - 1)]; | |
808 | ipoib_dma_unmap_tx(priv, tx_req); | |
809 | dev_kfree_skb_any(tx_req->skb); | |
810 | ++priv->tx_tail; | |
7ce1a3ee ES |
811 | } |
812 | ||
813 | for (i = 0; i < ipoib_recvq_size; ++i) { | |
814 | struct ipoib_rx_buf *rx_req; | |
815 | ||
816 | rx_req = &priv->rx_ring[i]; | |
817 | if (!rx_req->skb) | |
818 | continue; | |
819 | ipoib_ud_dma_unmap_rx(priv, | |
820 | priv->rx_ring[i].mapping); | |
821 | dev_kfree_skb_any(rx_req->skb); | |
822 | rx_req->skb = NULL; | |
823 | } | |
824 | ||
825 | goto timeout; | |
826 | } | |
827 | ||
828 | ipoib_drain_cq(dev); | |
829 | ||
98e77d9f | 830 | usleep_range(1000, 2000); |
26bbf13c | 831 | } |
26bbf13c | 832 | |
7ce1a3ee ES |
833 | ipoib_dbg(priv, "All sends and receives done.\n"); |
834 | ||
835 | timeout: | |
7ce1a3ee ES |
836 | qp_attr.qp_state = IB_QPS_RESET; |
837 | if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) | |
838 | ipoib_warn(priv, "Failed to modify QP to RESET state\n"); | |
839 | ||
840 | ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP); | |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
845 | int ipoib_ib_dev_stop(struct net_device *dev) | |
846 | { | |
cd565b4b ES |
847 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
848 | ||
849 | priv->rn_ops->ndo_stop(dev); | |
7ce1a3ee | 850 | |
cd565b4b | 851 | clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
7ce1a3ee ES |
852 | ipoib_flush_ah(dev); |
853 | ||
854 | return 0; | |
855 | } | |
856 | ||
7ce1a3ee ES |
857 | int ipoib_ib_dev_open_default(struct net_device *dev) |
858 | { | |
c1048aff | 859 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
7ce1a3ee ES |
860 | int ret; |
861 | ||
5b6810e0 | 862 | ret = ipoib_init_qp(dev); |
1da177e4 | 863 | if (ret) { |
5b6810e0 | 864 | ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); |
1da177e4 LT |
865 | return -1; |
866 | } | |
867 | ||
868 | ret = ipoib_ib_post_receives(dev); | |
869 | if (ret) { | |
870 | ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); | |
cd565b4b | 871 | goto out; |
1da177e4 LT |
872 | } |
873 | ||
839fcaba MT |
874 | ret = ipoib_cm_dev_open(dev); |
875 | if (ret) { | |
24bd1e4e | 876 | ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret); |
cd565b4b | 877 | goto out; |
839fcaba MT |
878 | } |
879 | ||
cd565b4b | 880 | if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
8966e28d | 881 | ipoib_napi_enable(dev); |
7a343d4c | 882 | |
1da177e4 | 883 | return 0; |
cd565b4b | 884 | out: |
c2bb5628 | 885 | return -1; |
1da177e4 LT |
886 | } |
887 | ||
7ce1a3ee ES |
888 | int ipoib_ib_dev_open(struct net_device *dev) |
889 | { | |
c1048aff | 890 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
7ce1a3ee ES |
891 | |
892 | ipoib_pkey_dev_check_presence(dev); | |
893 | ||
894 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
895 | ipoib_warn(priv, "P_Key 0x%04x is %s\n", priv->pkey, | |
896 | (!(priv->pkey & 0x7fff) ? "Invalid" : "not found")); | |
897 | return -1; | |
898 | } | |
899 | ||
900 | clear_bit(IPOIB_STOP_REAPER, &priv->flags); | |
901 | queue_delayed_work(priv->wq, &priv->ah_reap_task, | |
902 | round_jiffies_relative(HZ)); | |
903 | ||
cd565b4b | 904 | if (priv->rn_ops->ndo_open(dev)) { |
7ce1a3ee | 905 | pr_warn("%s: Failed to open dev\n", dev->name); |
cd565b4b | 906 | goto dev_stop; |
7ce1a3ee ES |
907 | } |
908 | ||
cd565b4b ES |
909 | set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
910 | ||
7ce1a3ee ES |
911 | return 0; |
912 | ||
cd565b4b | 913 | dev_stop: |
7ce1a3ee ES |
914 | set_bit(IPOIB_STOP_REAPER, &priv->flags); |
915 | cancel_delayed_work(&priv->ah_reap_task); | |
cd565b4b | 916 | set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); |
cd565b4b | 917 | ipoib_ib_dev_stop(dev); |
7ce1a3ee ES |
918 | return -1; |
919 | } | |
920 | ||
db84f880 | 921 | void ipoib_pkey_dev_check_presence(struct net_device *dev) |
7a343d4c | 922 | { |
c1048aff | 923 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
980f91c3 | 924 | struct rdma_netdev *rn = netdev_priv(dev); |
7a343d4c | 925 | |
dd57c930 AE |
926 | if (!(priv->pkey & 0x7fff) || |
927 | ib_find_pkey(priv->ca, priv->port, priv->pkey, | |
980f91c3 | 928 | &priv->pkey_index)) { |
7a343d4c | 929 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); |
980f91c3 AV |
930 | } else { |
931 | if (rn->set_id) | |
932 | rn->set_id(dev, priv->pkey_index); | |
7a343d4c | 933 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); |
980f91c3 | 934 | } |
7a343d4c LA |
935 | } |
936 | ||
5c37077f | 937 | void ipoib_ib_dev_up(struct net_device *dev) |
1da177e4 | 938 | { |
c1048aff | 939 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 | 940 | |
7a343d4c LA |
941 | ipoib_pkey_dev_check_presence(dev); |
942 | ||
943 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
944 | ipoib_dbg(priv, "PKEY is not assigned.\n"); | |
5c37077f | 945 | return; |
7a343d4c LA |
946 | } |
947 | ||
1da177e4 LT |
948 | set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); |
949 | ||
5c37077f | 950 | ipoib_mcast_start_thread(dev); |
1da177e4 LT |
951 | } |
952 | ||
dfc0e555 | 953 | void ipoib_ib_dev_down(struct net_device *dev) |
1da177e4 | 954 | { |
c1048aff | 955 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 LT |
956 | |
957 | ipoib_dbg(priv, "downing ib_dev\n"); | |
958 | ||
959 | clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
960 | netif_carrier_off(dev); | |
961 | ||
efc82eee | 962 | ipoib_mcast_stop_thread(dev); |
1da177e4 LT |
963 | ipoib_mcast_dev_flush(dev); |
964 | ||
1da177e4 | 965 | ipoib_flush_paths(dev); |
1da177e4 LT |
966 | } |
967 | ||
2dfbfc37 MT |
968 | void ipoib_drain_cq(struct net_device *dev) |
969 | { | |
c1048aff | 970 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
2dfbfc37 | 971 | int i, n; |
943c246e RD |
972 | |
973 | /* | |
974 | * We call completion handling routines that expect to be | |
975 | * called from the BH-disabled NAPI poll context, so disable | |
976 | * BHs here too. | |
977 | */ | |
978 | local_bh_disable(); | |
979 | ||
2dfbfc37 | 980 | do { |
f56bcd80 | 981 | n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); |
2dfbfc37 | 982 | for (i = 0; i < n; ++i) { |
ce423ef5 RD |
983 | /* |
984 | * Convert any successful completions to flush | |
985 | * errors to avoid passing packets up the | |
986 | * stack after bringing the device down. | |
987 | */ | |
988 | if (priv->ibwc[i].status == IB_WC_SUCCESS) | |
989 | priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; | |
990 | ||
1b524963 MT |
991 | if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) { |
992 | if (priv->ibwc[i].wr_id & IPOIB_OP_CM) | |
993 | ipoib_cm_handle_rx_wc(dev, priv->ibwc + i); | |
994 | else | |
995 | ipoib_ib_handle_rx_wc(dev, priv->ibwc + i); | |
8966e28d ES |
996 | } else { |
997 | pr_warn("%s: Got unexpected wqe id\n", __func__); | |
998 | } | |
2dfbfc37 MT |
999 | } |
1000 | } while (n == IPOIB_NUM_WC); | |
f56bcd80 EC |
1001 | |
1002 | while (poll_tx(priv)) | |
1003 | ; /* nothing */ | |
943c246e RD |
1004 | |
1005 | local_bh_enable(); | |
2dfbfc37 MT |
1006 | } |
1007 | ||
c2904141 ES |
1008 | /* |
1009 | * Takes whatever value which is in pkey index 0 and updates priv->pkey | |
1010 | * returns 0 if the pkey value was changed. | |
1011 | */ | |
1012 | static inline int update_parent_pkey(struct ipoib_dev_priv *priv) | |
1013 | { | |
1014 | int result; | |
1015 | u16 prev_pkey; | |
1016 | ||
1017 | prev_pkey = priv->pkey; | |
1018 | result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey); | |
1019 | if (result) { | |
1020 | ipoib_warn(priv, "ib_query_pkey port %d failed (ret = %d)\n", | |
1021 | priv->port, result); | |
1022 | return result; | |
1023 | } | |
1024 | ||
1025 | priv->pkey |= 0x8000; | |
1026 | ||
1027 | if (prev_pkey != priv->pkey) { | |
1028 | ipoib_dbg(priv, "pkey changed from 0x%x to 0x%x\n", | |
1029 | prev_pkey, priv->pkey); | |
1030 | /* | |
1031 | * Update the pkey in the broadcast address, while making sure to set | |
1032 | * the full membership bit, so that we join the right broadcast group. | |
1033 | */ | |
1034 | priv->dev->broadcast[8] = priv->pkey >> 8; | |
1035 | priv->dev->broadcast[9] = priv->pkey & 0xff; | |
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | return 1; | |
1040 | } | |
dd57c930 AE |
1041 | /* |
1042 | * returns 0 if pkey value was found in a different slot. | |
1043 | */ | |
1044 | static inline int update_child_pkey(struct ipoib_dev_priv *priv) | |
1045 | { | |
1046 | u16 old_index = priv->pkey_index; | |
1047 | ||
1048 | priv->pkey_index = 0; | |
1049 | ipoib_pkey_dev_check_presence(priv->dev); | |
1050 | ||
1051 | if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) && | |
1052 | (old_index == priv->pkey_index)) | |
1053 | return 1; | |
1054 | return 0; | |
1055 | } | |
c2904141 | 1056 | |
492a7e67 MB |
1057 | /* |
1058 | * returns true if the device address of the ipoib interface has changed and the | |
1059 | * new address is a valid one (i.e in the gid table), return false otherwise. | |
1060 | */ | |
1061 | static bool ipoib_dev_addr_changed_valid(struct ipoib_dev_priv *priv) | |
1062 | { | |
1063 | union ib_gid search_gid; | |
1064 | union ib_gid gid0; | |
1065 | union ib_gid *netdev_gid; | |
1066 | int err; | |
1067 | u16 index; | |
1068 | u8 port; | |
1069 | bool ret = false; | |
1070 | ||
1071 | netdev_gid = (union ib_gid *)(priv->dev->dev_addr + 4); | |
1072 | if (ib_query_gid(priv->ca, priv->port, 0, &gid0, NULL)) | |
1073 | return false; | |
1074 | ||
9b29953b | 1075 | netif_addr_lock_bh(priv->dev); |
492a7e67 MB |
1076 | |
1077 | /* The subnet prefix may have changed, update it now so we won't have | |
1078 | * to do it later | |
1079 | */ | |
1080 | priv->local_gid.global.subnet_prefix = gid0.global.subnet_prefix; | |
1081 | netdev_gid->global.subnet_prefix = gid0.global.subnet_prefix; | |
1082 | search_gid.global.subnet_prefix = gid0.global.subnet_prefix; | |
1083 | ||
1084 | search_gid.global.interface_id = priv->local_gid.global.interface_id; | |
1085 | ||
9b29953b | 1086 | netif_addr_unlock_bh(priv->dev); |
492a7e67 MB |
1087 | |
1088 | err = ib_find_gid(priv->ca, &search_gid, IB_GID_TYPE_IB, | |
1089 | priv->dev, &port, &index); | |
1090 | ||
9b29953b | 1091 | netif_addr_lock_bh(priv->dev); |
492a7e67 MB |
1092 | |
1093 | if (search_gid.global.interface_id != | |
1094 | priv->local_gid.global.interface_id) | |
1095 | /* There was a change while we were looking up the gid, bail | |
1096 | * here and let the next work sort this out | |
1097 | */ | |
1098 | goto out; | |
1099 | ||
1100 | /* The next section of code needs some background: | |
1101 | * Per IB spec the port GUID can't change if the HCA is powered on. | |
1102 | * port GUID is the basis for GID at index 0 which is the basis for | |
1103 | * the default device address of a ipoib interface. | |
1104 | * | |
1105 | * so it seems the flow should be: | |
1106 | * if user_changed_dev_addr && gid in gid tbl | |
1107 | * set bit dev_addr_set | |
1108 | * return true | |
1109 | * else | |
1110 | * return false | |
1111 | * | |
1112 | * The issue is that there are devices that don't follow the spec, | |
1113 | * they change the port GUID when the HCA is powered, so in order | |
1114 | * not to break userspace applications, We need to check if the | |
1115 | * user wanted to control the device address and we assume that | |
1116 | * if he sets the device address back to be based on GID index 0, | |
1117 | * he no longer wishs to control it. | |
1118 | * | |
1119 | * If the user doesn't control the the device address, | |
1120 | * IPOIB_FLAG_DEV_ADDR_SET is set and ib_find_gid failed it means | |
1121 | * the port GUID has changed and GID at index 0 has changed | |
1122 | * so we need to change priv->local_gid and priv->dev->dev_addr | |
1123 | * to reflect the new GID. | |
1124 | */ | |
1125 | if (!test_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags)) { | |
1126 | if (!err && port == priv->port) { | |
1127 | set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags); | |
1128 | if (index == 0) | |
1129 | clear_bit(IPOIB_FLAG_DEV_ADDR_CTRL, | |
1130 | &priv->flags); | |
1131 | else | |
1132 | set_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags); | |
1133 | ret = true; | |
1134 | } else { | |
1135 | ret = false; | |
1136 | } | |
1137 | } else { | |
1138 | if (!err && port == priv->port) { | |
1139 | ret = true; | |
1140 | } else { | |
1141 | if (!test_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags)) { | |
1142 | memcpy(&priv->local_gid, &gid0, | |
1143 | sizeof(priv->local_gid)); | |
1144 | memcpy(priv->dev->dev_addr + 4, &gid0, | |
1145 | sizeof(priv->local_gid)); | |
1146 | ret = true; | |
1147 | } | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | out: | |
9b29953b | 1152 | netif_addr_unlock_bh(priv->dev); |
492a7e67 MB |
1153 | |
1154 | return ret; | |
1155 | } | |
1156 | ||
ee1e2c82 | 1157 | static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, |
8b7cce0d HE |
1158 | enum ipoib_flush_level level, |
1159 | int nesting) | |
1da177e4 | 1160 | { |
26bbf13c | 1161 | struct ipoib_dev_priv *cpriv; |
c4028958 | 1162 | struct net_device *dev = priv->dev; |
c2904141 | 1163 | int result; |
26bbf13c | 1164 | |
8b7cce0d | 1165 | down_read_nested(&priv->vlan_rwsem, nesting); |
1da177e4 | 1166 | |
26bbf13c YE |
1167 | /* |
1168 | * Flush any child interfaces too -- they might be up even if | |
1169 | * the parent is down. | |
1170 | */ | |
1171 | list_for_each_entry(cpriv, &priv->child_intfs, list) | |
8b7cce0d | 1172 | __ipoib_ib_dev_flush(cpriv, level, nesting + 1); |
26bbf13c | 1173 | |
f47944cc | 1174 | up_read(&priv->vlan_rwsem); |
26bbf13c | 1175 | |
dd57c930 AE |
1176 | if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) && |
1177 | level != IPOIB_FLUSH_HEAVY) { | |
492a7e67 MB |
1178 | /* Make sure the dev_addr is set even if not flushing */ |
1179 | if (level == IPOIB_FLUSH_LIGHT) | |
1180 | ipoib_dev_addr_changed_valid(priv); | |
7a343d4c LA |
1181 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); |
1182 | return; | |
1183 | } | |
1184 | ||
1185 | if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { | |
dd57c930 AE |
1186 | /* interface is down. update pkey and leave. */ |
1187 | if (level == IPOIB_FLUSH_HEAVY) { | |
1188 | if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) | |
1189 | update_parent_pkey(priv); | |
1190 | else | |
1191 | update_child_pkey(priv); | |
492a7e67 MB |
1192 | } else if (level == IPOIB_FLUSH_LIGHT) |
1193 | ipoib_dev_addr_changed_valid(priv); | |
7a343d4c | 1194 | ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); |
1da177e4 | 1195 | return; |
7a343d4c | 1196 | } |
1da177e4 | 1197 | |
ee1e2c82 | 1198 | if (level == IPOIB_FLUSH_HEAVY) { |
c2904141 ES |
1199 | /* child devices chase their origin pkey value, while non-child |
1200 | * (parent) devices should always takes what present in pkey index 0 | |
1201 | */ | |
1202 | if (test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { | |
dd57c930 AE |
1203 | result = update_child_pkey(priv); |
1204 | if (result) { | |
1205 | /* restart QP only if P_Key index is changed */ | |
c2904141 | 1206 | ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); |
9fdd5e5b | 1207 | return; |
c2904141 | 1208 | } |
dd57c930 | 1209 | |
c2904141 ES |
1210 | } else { |
1211 | result = update_parent_pkey(priv); | |
1212 | /* restart QP only if P_Key value changed */ | |
1213 | if (result) { | |
1214 | ipoib_dbg(priv, "Not flushing - P_Key value not changed.\n"); | |
1215 | return; | |
1216 | } | |
26bbf13c | 1217 | } |
26bbf13c YE |
1218 | } |
1219 | ||
ee1e2c82 | 1220 | if (level == IPOIB_FLUSH_LIGHT) { |
344bacca | 1221 | int oper_up; |
ee1e2c82 | 1222 | ipoib_mark_paths_invalid(dev); |
344bacca AV |
1223 | /* Set IPoIB operation as down to prevent races between: |
1224 | * the flush flow which leaves MCG and on the fly joins | |
1225 | * which can happen during that time. mcast restart task | |
1226 | * should deal with join requests we missed. | |
1227 | */ | |
1228 | oper_up = test_and_clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
ee1e2c82 | 1229 | ipoib_mcast_dev_flush(dev); |
344bacca AV |
1230 | if (oper_up) |
1231 | set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
efc82eee | 1232 | ipoib_flush_ah(dev); |
ee1e2c82 | 1233 | } |
1da177e4 | 1234 | |
ee1e2c82 | 1235 | if (level >= IPOIB_FLUSH_NORMAL) |
efc82eee | 1236 | ipoib_ib_dev_down(dev); |
1da177e4 | 1237 | |
ee1e2c82 | 1238 | if (level == IPOIB_FLUSH_HEAVY) { |
dd57c930 | 1239 | if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) |
efc82eee | 1240 | ipoib_ib_dev_stop(dev); |
b4b678b0 | 1241 | |
1f80bd6a | 1242 | if (ipoib_ib_dev_open(dev)) |
dd57c930 | 1243 | return; |
b4b678b0 | 1244 | |
dd57c930 AE |
1245 | if (netif_queue_stopped(dev)) |
1246 | netif_start_queue(dev); | |
26bbf13c YE |
1247 | } |
1248 | ||
1da177e4 LT |
1249 | /* |
1250 | * The device could have been brought down between the start and when | |
1251 | * we get here, don't bring it back up if it's not configured up | |
1252 | */ | |
5ccd0255 | 1253 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { |
ee1e2c82 MS |
1254 | if (level >= IPOIB_FLUSH_NORMAL) |
1255 | ipoib_ib_dev_up(dev); | |
492a7e67 MB |
1256 | if (ipoib_dev_addr_changed_valid(priv)) |
1257 | ipoib_mcast_restart_task(&priv->restart_task); | |
5ccd0255 | 1258 | } |
26bbf13c | 1259 | } |
1da177e4 | 1260 | |
ee1e2c82 MS |
1261 | void ipoib_ib_dev_flush_light(struct work_struct *work) |
1262 | { | |
1263 | struct ipoib_dev_priv *priv = | |
1264 | container_of(work, struct ipoib_dev_priv, flush_light); | |
1265 | ||
8b7cce0d | 1266 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT, 0); |
ee1e2c82 MS |
1267 | } |
1268 | ||
1269 | void ipoib_ib_dev_flush_normal(struct work_struct *work) | |
26bbf13c YE |
1270 | { |
1271 | struct ipoib_dev_priv *priv = | |
ee1e2c82 | 1272 | container_of(work, struct ipoib_dev_priv, flush_normal); |
4f71055a | 1273 | |
8b7cce0d | 1274 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL, 0); |
26bbf13c | 1275 | } |
4f71055a | 1276 | |
ee1e2c82 | 1277 | void ipoib_ib_dev_flush_heavy(struct work_struct *work) |
26bbf13c YE |
1278 | { |
1279 | struct ipoib_dev_priv *priv = | |
ee1e2c82 | 1280 | container_of(work, struct ipoib_dev_priv, flush_heavy); |
26bbf13c | 1281 | |
1f80bd6a | 1282 | rtnl_lock(); |
8b7cce0d | 1283 | __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY, 0); |
1f80bd6a | 1284 | rtnl_unlock(); |
1da177e4 LT |
1285 | } |
1286 | ||
1287 | void ipoib_ib_dev_cleanup(struct net_device *dev) | |
1288 | { | |
c1048aff | 1289 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1da177e4 LT |
1290 | |
1291 | ipoib_dbg(priv, "cleaning up ib_dev\n"); | |
a39c52ab ES |
1292 | /* |
1293 | * We must make sure there are no more (path) completions | |
1294 | * that may wish to touch priv fields that are no longer valid | |
1295 | */ | |
1296 | ipoib_flush_paths(dev); | |
1da177e4 | 1297 | |
efc82eee | 1298 | ipoib_mcast_stop_thread(dev); |
988bd503 | 1299 | ipoib_mcast_dev_flush(dev); |
1da177e4 | 1300 | |
e135106f DL |
1301 | /* |
1302 | * All of our ah references aren't free until after | |
1303 | * ipoib_mcast_dev_flush(), ipoib_flush_paths, and | |
1304 | * the neighbor garbage collection is stopped and reaped. | |
1305 | * That should all be done now, so make a final ah flush. | |
1306 | */ | |
efc82eee | 1307 | ipoib_stop_ah(dev); |
e135106f | 1308 | |
515ed4f3 ES |
1309 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); |
1310 | ||
cd565b4b | 1311 | priv->rn_ops->ndo_uninit(dev); |
1da177e4 | 1312 | |
515ed4f3 ES |
1313 | if (priv->pd) { |
1314 | ib_dealloc_pd(priv->pd); | |
1315 | priv->pd = NULL; | |
1316 | } | |
1317 | } | |
1da177e4 | 1318 |