Commit | Line | Data |
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839fcaba MT |
1 | /* |
2 | * Copyright (c) 2006 Mellanox Technologies. All rights reserved | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | * | |
32 | * $Id$ | |
33 | */ | |
34 | ||
35 | #include <rdma/ib_cm.h> | |
36 | #include <rdma/ib_cache.h> | |
37 | #include <net/dst.h> | |
38 | #include <net/icmp.h> | |
39 | #include <linux/icmpv6.h> | |
518b1646 | 40 | #include <linux/delay.h> |
839fcaba | 41 | |
68e995a2 PS |
42 | #include "ipoib.h" |
43 | ||
44 | int ipoib_max_conn_qp = 128; | |
45 | ||
46 | module_param_named(max_nonsrq_conn_qp, ipoib_max_conn_qp, int, 0444); | |
47 | MODULE_PARM_DESC(max_nonsrq_conn_qp, | |
48 | "Max number of connected-mode QPs per interface " | |
49 | "(applied only if shared receive queue is not available)"); | |
50 | ||
839fcaba MT |
51 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA |
52 | static int data_debug_level; | |
53 | ||
54 | module_param_named(cm_data_debug_level, data_debug_level, int, 0644); | |
55 | MODULE_PARM_DESC(cm_data_debug_level, | |
56 | "Enable data path debug tracing for connected mode if > 0"); | |
57 | #endif | |
58 | ||
839fcaba MT |
59 | #define IPOIB_CM_IETF_ID 0x1000000000000000ULL |
60 | ||
61 | #define IPOIB_CM_RX_UPDATE_TIME (256 * HZ) | |
62 | #define IPOIB_CM_RX_TIMEOUT (2 * 256 * HZ) | |
63 | #define IPOIB_CM_RX_DELAY (3 * 256 * HZ) | |
64 | #define IPOIB_CM_RX_UPDATE_MASK (0x3) | |
65 | ||
518b1646 MT |
66 | static struct ib_qp_attr ipoib_cm_err_attr = { |
67 | .qp_state = IB_QPS_ERR | |
68 | }; | |
69 | ||
09f60f8f | 70 | #define IPOIB_CM_RX_DRAIN_WRID 0xffffffff |
518b1646 | 71 | |
ec56dc0b MT |
72 | static struct ib_send_wr ipoib_cm_rx_drain_wr = { |
73 | .wr_id = IPOIB_CM_RX_DRAIN_WRID, | |
74 | .opcode = IB_WR_SEND, | |
518b1646 MT |
75 | }; |
76 | ||
839fcaba MT |
77 | static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, |
78 | struct ib_cm_event *event); | |
79 | ||
1812063b | 80 | static void ipoib_cm_dma_unmap_rx(struct ipoib_dev_priv *priv, int frags, |
839fcaba MT |
81 | u64 mapping[IPOIB_CM_RX_SG]) |
82 | { | |
83 | int i; | |
84 | ||
85 | ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_CM_HEAD_SIZE, DMA_FROM_DEVICE); | |
86 | ||
1812063b | 87 | for (i = 0; i < frags; ++i) |
839fcaba MT |
88 | ib_dma_unmap_single(priv->ca, mapping[i + 1], PAGE_SIZE, DMA_FROM_DEVICE); |
89 | } | |
90 | ||
68e995a2 | 91 | static int ipoib_cm_post_receive_srq(struct net_device *dev, int id) |
839fcaba MT |
92 | { |
93 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
94 | struct ib_recv_wr *bad_wr; | |
95 | int i, ret; | |
96 | ||
1b524963 | 97 | priv->cm.rx_wr.wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV; |
839fcaba | 98 | |
586a6934 | 99 | for (i = 0; i < priv->cm.num_frags; ++i) |
839fcaba MT |
100 | priv->cm.rx_sge[i].addr = priv->cm.srq_ring[id].mapping[i]; |
101 | ||
102 | ret = ib_post_srq_recv(priv->cm.srq, &priv->cm.rx_wr, &bad_wr); | |
103 | if (unlikely(ret)) { | |
104 | ipoib_warn(priv, "post srq failed for buf %d (%d)\n", id, ret); | |
586a6934 | 105 | ipoib_cm_dma_unmap_rx(priv, priv->cm.num_frags - 1, |
1812063b | 106 | priv->cm.srq_ring[id].mapping); |
839fcaba MT |
107 | dev_kfree_skb_any(priv->cm.srq_ring[id].skb); |
108 | priv->cm.srq_ring[id].skb = NULL; | |
109 | } | |
110 | ||
111 | return ret; | |
112 | } | |
113 | ||
68e995a2 PS |
114 | static int ipoib_cm_post_receive_nonsrq(struct net_device *dev, |
115 | struct ipoib_cm_rx *rx, int id) | |
116 | { | |
117 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
118 | struct ib_recv_wr *bad_wr; | |
119 | int i, ret; | |
120 | ||
121 | priv->cm.rx_wr.wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV; | |
122 | ||
123 | for (i = 0; i < IPOIB_CM_RX_SG; ++i) | |
124 | priv->cm.rx_sge[i].addr = rx->rx_ring[id].mapping[i]; | |
125 | ||
126 | ret = ib_post_recv(rx->qp, &priv->cm.rx_wr, &bad_wr); | |
127 | if (unlikely(ret)) { | |
128 | ipoib_warn(priv, "post recv failed for buf %d (%d)\n", id, ret); | |
129 | ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1, | |
130 | rx->rx_ring[id].mapping); | |
131 | dev_kfree_skb_any(rx->rx_ring[id].skb); | |
132 | rx->rx_ring[id].skb = NULL; | |
133 | } | |
134 | ||
135 | return ret; | |
136 | } | |
137 | ||
138 | static struct sk_buff *ipoib_cm_alloc_rx_skb(struct net_device *dev, | |
139 | struct ipoib_cm_rx_buf *rx_ring, | |
140 | int id, int frags, | |
1812063b | 141 | u64 mapping[IPOIB_CM_RX_SG]) |
839fcaba MT |
142 | { |
143 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
144 | struct sk_buff *skb; | |
145 | int i; | |
146 | ||
147 | skb = dev_alloc_skb(IPOIB_CM_HEAD_SIZE + 12); | |
148 | if (unlikely(!skb)) | |
1812063b | 149 | return NULL; |
839fcaba MT |
150 | |
151 | /* | |
152 | * IPoIB adds a 4 byte header. So we need 12 more bytes to align the | |
153 | * IP header to a multiple of 16. | |
154 | */ | |
155 | skb_reserve(skb, 12); | |
156 | ||
157 | mapping[0] = ib_dma_map_single(priv->ca, skb->data, IPOIB_CM_HEAD_SIZE, | |
158 | DMA_FROM_DEVICE); | |
159 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0]))) { | |
160 | dev_kfree_skb_any(skb); | |
1812063b | 161 | return NULL; |
839fcaba MT |
162 | } |
163 | ||
1812063b | 164 | for (i = 0; i < frags; i++) { |
839fcaba MT |
165 | struct page *page = alloc_page(GFP_ATOMIC); |
166 | ||
167 | if (!page) | |
168 | goto partial_error; | |
169 | skb_fill_page_desc(skb, i, page, 0, PAGE_SIZE); | |
170 | ||
171 | mapping[i + 1] = ib_dma_map_page(priv->ca, skb_shinfo(skb)->frags[i].page, | |
6371ea3d | 172 | 0, PAGE_SIZE, DMA_FROM_DEVICE); |
839fcaba MT |
173 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[i + 1]))) |
174 | goto partial_error; | |
175 | } | |
176 | ||
68e995a2 | 177 | rx_ring[id].skb = skb; |
1812063b | 178 | return skb; |
839fcaba MT |
179 | |
180 | partial_error: | |
181 | ||
182 | ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_CM_HEAD_SIZE, DMA_FROM_DEVICE); | |
183 | ||
841adfca RC |
184 | for (; i > 0; --i) |
185 | ib_dma_unmap_single(priv->ca, mapping[i], PAGE_SIZE, DMA_FROM_DEVICE); | |
839fcaba | 186 | |
8a2e65f8 | 187 | dev_kfree_skb_any(skb); |
1812063b | 188 | return NULL; |
839fcaba MT |
189 | } |
190 | ||
1efb6144 RD |
191 | static void ipoib_cm_free_rx_ring(struct net_device *dev, |
192 | struct ipoib_cm_rx_buf *rx_ring) | |
193 | { | |
194 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
195 | int i; | |
196 | ||
197 | for (i = 0; i < ipoib_recvq_size; ++i) | |
198 | if (rx_ring[i].skb) { | |
199 | ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1, | |
200 | rx_ring[i].mapping); | |
201 | dev_kfree_skb_any(rx_ring[i].skb); | |
202 | } | |
203 | ||
204 | kfree(rx_ring); | |
205 | } | |
206 | ||
2337f809 | 207 | static void ipoib_cm_start_rx_drain(struct ipoib_dev_priv *priv) |
518b1646 | 208 | { |
ec56dc0b MT |
209 | struct ib_send_wr *bad_wr; |
210 | struct ipoib_cm_rx *p; | |
518b1646 | 211 | |
ec56dc0b | 212 | /* We only reserved 1 extra slot in CQ for drain WRs, so |
518b1646 MT |
213 | * make sure we have at most 1 outstanding WR. */ |
214 | if (list_empty(&priv->cm.rx_flush_list) || | |
215 | !list_empty(&priv->cm.rx_drain_list)) | |
216 | return; | |
217 | ||
ec56dc0b MT |
218 | /* |
219 | * QPs on flush list are error state. This way, a "flush | |
220 | * error" WC will be immediately generated for each WR we post. | |
221 | */ | |
222 | p = list_entry(priv->cm.rx_flush_list.next, typeof(*p), list); | |
223 | if (ib_post_send(p->qp, &ipoib_cm_rx_drain_wr, &bad_wr)) | |
224 | ipoib_warn(priv, "failed to post drain wr\n"); | |
518b1646 MT |
225 | |
226 | list_splice_init(&priv->cm.rx_flush_list, &priv->cm.rx_drain_list); | |
227 | } | |
228 | ||
229 | static void ipoib_cm_rx_event_handler(struct ib_event *event, void *ctx) | |
230 | { | |
231 | struct ipoib_cm_rx *p = ctx; | |
232 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); | |
233 | unsigned long flags; | |
234 | ||
235 | if (event->event != IB_EVENT_QP_LAST_WQE_REACHED) | |
236 | return; | |
237 | ||
238 | spin_lock_irqsave(&priv->lock, flags); | |
239 | list_move(&p->list, &priv->cm.rx_flush_list); | |
240 | p->state = IPOIB_CM_RX_FLUSH; | |
241 | ipoib_cm_start_rx_drain(priv); | |
242 | spin_unlock_irqrestore(&priv->lock, flags); | |
243 | } | |
244 | ||
839fcaba MT |
245 | static struct ib_qp *ipoib_cm_create_rx_qp(struct net_device *dev, |
246 | struct ipoib_cm_rx *p) | |
247 | { | |
248 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
249 | struct ib_qp_init_attr attr = { | |
518b1646 | 250 | .event_handler = ipoib_cm_rx_event_handler, |
ec56dc0b | 251 | .send_cq = priv->cq, /* For drain WR */ |
839fcaba MT |
252 | .recv_cq = priv->cq, |
253 | .srq = priv->cm.srq, | |
ec56dc0b | 254 | .cap.max_send_wr = 1, /* For drain WR */ |
839fcaba MT |
255 | .cap.max_send_sge = 1, /* FIXME: 0 Seems not to work */ |
256 | .sq_sig_type = IB_SIGNAL_ALL_WR, | |
257 | .qp_type = IB_QPT_RC, | |
258 | .qp_context = p, | |
259 | }; | |
68e995a2 PS |
260 | |
261 | if (!ipoib_cm_has_srq(dev)) { | |
262 | attr.cap.max_recv_wr = ipoib_recvq_size; | |
263 | attr.cap.max_recv_sge = IPOIB_CM_RX_SG; | |
264 | } | |
265 | ||
839fcaba MT |
266 | return ib_create_qp(priv->pd, &attr); |
267 | } | |
268 | ||
269 | static int ipoib_cm_modify_rx_qp(struct net_device *dev, | |
68e995a2 PS |
270 | struct ib_cm_id *cm_id, struct ib_qp *qp, |
271 | unsigned psn) | |
839fcaba MT |
272 | { |
273 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
274 | struct ib_qp_attr qp_attr; | |
275 | int qp_attr_mask, ret; | |
276 | ||
277 | qp_attr.qp_state = IB_QPS_INIT; | |
278 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
279 | if (ret) { | |
280 | ipoib_warn(priv, "failed to init QP attr for INIT: %d\n", ret); | |
281 | return ret; | |
282 | } | |
283 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); | |
284 | if (ret) { | |
285 | ipoib_warn(priv, "failed to modify QP to INIT: %d\n", ret); | |
286 | return ret; | |
287 | } | |
288 | qp_attr.qp_state = IB_QPS_RTR; | |
289 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
290 | if (ret) { | |
291 | ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); | |
292 | return ret; | |
293 | } | |
294 | qp_attr.rq_psn = psn; | |
295 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); | |
296 | if (ret) { | |
297 | ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); | |
298 | return ret; | |
299 | } | |
ec56dc0b MT |
300 | |
301 | /* | |
302 | * Current Mellanox HCA firmware won't generate completions | |
303 | * with error for drain WRs unless the QP has been moved to | |
304 | * RTS first. This work-around leaves a window where a QP has | |
305 | * moved to error asynchronously, but this will eventually get | |
306 | * fixed in firmware, so let's not error out if modify QP | |
307 | * fails. | |
308 | */ | |
309 | qp_attr.qp_state = IB_QPS_RTS; | |
310 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
311 | if (ret) { | |
312 | ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); | |
313 | return 0; | |
314 | } | |
315 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); | |
316 | if (ret) { | |
317 | ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); | |
318 | return 0; | |
319 | } | |
320 | ||
839fcaba MT |
321 | return 0; |
322 | } | |
323 | ||
68e995a2 PS |
324 | static int ipoib_cm_nonsrq_init_rx(struct net_device *dev, struct ib_cm_id *cm_id, |
325 | struct ipoib_cm_rx *rx) | |
326 | { | |
327 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
328 | int ret; | |
329 | int i; | |
330 | ||
331 | rx->rx_ring = kcalloc(ipoib_recvq_size, sizeof *rx->rx_ring, GFP_KERNEL); | |
332 | if (!rx->rx_ring) | |
333 | return -ENOMEM; | |
334 | ||
335 | spin_lock_irq(&priv->lock); | |
336 | ||
337 | if (priv->cm.nonsrq_conn_qp >= ipoib_max_conn_qp) { | |
338 | spin_unlock_irq(&priv->lock); | |
339 | ib_send_cm_rej(cm_id, IB_CM_REJ_NO_QP, NULL, 0, NULL, 0); | |
340 | ret = -EINVAL; | |
341 | goto err_free; | |
342 | } else | |
343 | ++priv->cm.nonsrq_conn_qp; | |
344 | ||
345 | spin_unlock_irq(&priv->lock); | |
346 | ||
347 | for (i = 0; i < ipoib_recvq_size; ++i) { | |
348 | if (!ipoib_cm_alloc_rx_skb(dev, rx->rx_ring, i, IPOIB_CM_RX_SG - 1, | |
349 | rx->rx_ring[i].mapping)) { | |
350 | ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); | |
351 | ret = -ENOMEM; | |
352 | goto err_count; | |
353 | } | |
354 | ret = ipoib_cm_post_receive_nonsrq(dev, rx, i); | |
355 | if (ret) { | |
356 | ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq " | |
357 | "failed for buf %d\n", i); | |
358 | ret = -EIO; | |
359 | goto err_count; | |
360 | } | |
361 | } | |
362 | ||
363 | rx->recv_count = ipoib_recvq_size; | |
364 | ||
365 | return 0; | |
366 | ||
367 | err_count: | |
368 | spin_lock_irq(&priv->lock); | |
369 | --priv->cm.nonsrq_conn_qp; | |
370 | spin_unlock_irq(&priv->lock); | |
371 | ||
372 | err_free: | |
373 | ipoib_cm_free_rx_ring(dev, rx->rx_ring); | |
374 | ||
375 | return ret; | |
376 | } | |
377 | ||
839fcaba MT |
378 | static int ipoib_cm_send_rep(struct net_device *dev, struct ib_cm_id *cm_id, |
379 | struct ib_qp *qp, struct ib_cm_req_event_param *req, | |
380 | unsigned psn) | |
381 | { | |
382 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
383 | struct ipoib_cm_data data = {}; | |
384 | struct ib_cm_rep_param rep = {}; | |
385 | ||
386 | data.qpn = cpu_to_be32(priv->qp->qp_num); | |
387 | data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); | |
388 | ||
389 | rep.private_data = &data; | |
390 | rep.private_data_len = sizeof data; | |
391 | rep.flow_control = 0; | |
392 | rep.rnr_retry_count = req->rnr_retry_count; | |
68e995a2 | 393 | rep.srq = ipoib_cm_has_srq(dev); |
839fcaba MT |
394 | rep.qp_num = qp->qp_num; |
395 | rep.starting_psn = psn; | |
396 | return ib_send_cm_rep(cm_id, &rep); | |
397 | } | |
398 | ||
399 | static int ipoib_cm_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
400 | { | |
401 | struct net_device *dev = cm_id->context; | |
402 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
403 | struct ipoib_cm_rx *p; | |
839fcaba MT |
404 | unsigned psn; |
405 | int ret; | |
406 | ||
407 | ipoib_dbg(priv, "REQ arrived\n"); | |
408 | p = kzalloc(sizeof *p, GFP_KERNEL); | |
409 | if (!p) | |
410 | return -ENOMEM; | |
411 | p->dev = dev; | |
412 | p->id = cm_id; | |
3ec7393a MT |
413 | cm_id->context = p; |
414 | p->state = IPOIB_CM_RX_LIVE; | |
415 | p->jiffies = jiffies; | |
416 | INIT_LIST_HEAD(&p->list); | |
417 | ||
839fcaba MT |
418 | p->qp = ipoib_cm_create_rx_qp(dev, p); |
419 | if (IS_ERR(p->qp)) { | |
420 | ret = PTR_ERR(p->qp); | |
421 | goto err_qp; | |
422 | } | |
423 | ||
424 | psn = random32() & 0xffffff; | |
425 | ret = ipoib_cm_modify_rx_qp(dev, cm_id, p->qp, psn); | |
426 | if (ret) | |
427 | goto err_modify; | |
428 | ||
68e995a2 PS |
429 | if (!ipoib_cm_has_srq(dev)) { |
430 | ret = ipoib_cm_nonsrq_init_rx(dev, cm_id, p); | |
431 | if (ret) | |
432 | goto err_modify; | |
433 | } | |
434 | ||
3ec7393a MT |
435 | spin_lock_irq(&priv->lock); |
436 | queue_delayed_work(ipoib_workqueue, | |
437 | &priv->cm.stale_task, IPOIB_CM_RX_DELAY); | |
438 | /* Add this entry to passive ids list head, but do not re-add it | |
439 | * if IB_EVENT_QP_LAST_WQE_REACHED has moved it to flush list. */ | |
440 | p->jiffies = jiffies; | |
441 | if (p->state == IPOIB_CM_RX_LIVE) | |
442 | list_move(&p->list, &priv->cm.passive_ids); | |
443 | spin_unlock_irq(&priv->lock); | |
444 | ||
839fcaba MT |
445 | ret = ipoib_cm_send_rep(dev, cm_id, p->qp, &event->param.req_rcvd, psn); |
446 | if (ret) { | |
447 | ipoib_warn(priv, "failed to send REP: %d\n", ret); | |
3ec7393a MT |
448 | if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) |
449 | ipoib_warn(priv, "unable to move qp to error state\n"); | |
839fcaba | 450 | } |
839fcaba MT |
451 | return 0; |
452 | ||
839fcaba MT |
453 | err_modify: |
454 | ib_destroy_qp(p->qp); | |
455 | err_qp: | |
456 | kfree(p); | |
457 | return ret; | |
458 | } | |
459 | ||
460 | static int ipoib_cm_rx_handler(struct ib_cm_id *cm_id, | |
461 | struct ib_cm_event *event) | |
462 | { | |
463 | struct ipoib_cm_rx *p; | |
464 | struct ipoib_dev_priv *priv; | |
839fcaba MT |
465 | |
466 | switch (event->event) { | |
467 | case IB_CM_REQ_RECEIVED: | |
468 | return ipoib_cm_req_handler(cm_id, event); | |
469 | case IB_CM_DREQ_RECEIVED: | |
470 | p = cm_id->context; | |
471 | ib_send_cm_drep(cm_id, NULL, 0); | |
472 | /* Fall through */ | |
473 | case IB_CM_REJ_RECEIVED: | |
474 | p = cm_id->context; | |
475 | priv = netdev_priv(p->dev); | |
518b1646 MT |
476 | if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) |
477 | ipoib_warn(priv, "unable to move qp to error state\n"); | |
478 | /* Fall through */ | |
839fcaba MT |
479 | default: |
480 | return 0; | |
481 | } | |
482 | } | |
483 | /* Adjust length of skb with fragments to match received data */ | |
484 | static void skb_put_frags(struct sk_buff *skb, unsigned int hdr_space, | |
1812063b | 485 | unsigned int length, struct sk_buff *toskb) |
839fcaba MT |
486 | { |
487 | int i, num_frags; | |
488 | unsigned int size; | |
489 | ||
490 | /* put header into skb */ | |
491 | size = min(length, hdr_space); | |
492 | skb->tail += size; | |
493 | skb->len += size; | |
494 | length -= size; | |
495 | ||
496 | num_frags = skb_shinfo(skb)->nr_frags; | |
497 | for (i = 0; i < num_frags; i++) { | |
498 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
499 | ||
500 | if (length == 0) { | |
501 | /* don't need this page */ | |
1812063b | 502 | skb_fill_page_desc(toskb, i, frag->page, 0, PAGE_SIZE); |
839fcaba MT |
503 | --skb_shinfo(skb)->nr_frags; |
504 | } else { | |
505 | size = min(length, (unsigned) PAGE_SIZE); | |
506 | ||
507 | frag->size = size; | |
508 | skb->data_len += size; | |
509 | skb->truesize += size; | |
510 | skb->len += size; | |
511 | length -= size; | |
512 | } | |
513 | } | |
514 | } | |
515 | ||
516 | void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) | |
517 | { | |
518 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
68e995a2 | 519 | struct ipoib_cm_rx_buf *rx_ring; |
1b524963 | 520 | unsigned int wr_id = wc->wr_id & ~(IPOIB_OP_CM | IPOIB_OP_RECV); |
1812063b | 521 | struct sk_buff *skb, *newskb; |
839fcaba MT |
522 | struct ipoib_cm_rx *p; |
523 | unsigned long flags; | |
524 | u64 mapping[IPOIB_CM_RX_SG]; | |
1812063b | 525 | int frags; |
68e995a2 | 526 | int has_srq; |
839fcaba | 527 | |
a89875fc RD |
528 | ipoib_dbg_data(priv, "cm recv completion: id %d, status: %d\n", |
529 | wr_id, wc->status); | |
839fcaba MT |
530 | |
531 | if (unlikely(wr_id >= ipoib_recvq_size)) { | |
1b524963 | 532 | if (wr_id == (IPOIB_CM_RX_DRAIN_WRID & ~(IPOIB_OP_CM | IPOIB_OP_RECV))) { |
518b1646 MT |
533 | spin_lock_irqsave(&priv->lock, flags); |
534 | list_splice_init(&priv->cm.rx_drain_list, &priv->cm.rx_reap_list); | |
535 | ipoib_cm_start_rx_drain(priv); | |
536 | queue_work(ipoib_workqueue, &priv->cm.rx_reap_task); | |
537 | spin_unlock_irqrestore(&priv->lock, flags); | |
538 | } else | |
539 | ipoib_warn(priv, "cm recv completion event with wrid %d (> %d)\n", | |
540 | wr_id, ipoib_recvq_size); | |
839fcaba MT |
541 | return; |
542 | } | |
543 | ||
68e995a2 PS |
544 | p = wc->qp->qp_context; |
545 | ||
546 | has_srq = ipoib_cm_has_srq(dev); | |
547 | rx_ring = has_srq ? priv->cm.srq_ring : p->rx_ring; | |
548 | ||
549 | skb = rx_ring[wr_id].skb; | |
839fcaba MT |
550 | |
551 | if (unlikely(wc->status != IB_WC_SUCCESS)) { | |
552 | ipoib_dbg(priv, "cm recv error " | |
553 | "(status=%d, wrid=%d vend_err %x)\n", | |
554 | wc->status, wr_id, wc->vendor_err); | |
de903512 | 555 | ++dev->stats.rx_dropped; |
68e995a2 PS |
556 | if (has_srq) |
557 | goto repost; | |
558 | else { | |
559 | if (!--p->recv_count) { | |
560 | spin_lock_irqsave(&priv->lock, flags); | |
561 | list_move(&p->list, &priv->cm.rx_reap_list); | |
562 | spin_unlock_irqrestore(&priv->lock, flags); | |
563 | queue_work(ipoib_workqueue, &priv->cm.rx_reap_task); | |
564 | } | |
565 | return; | |
566 | } | |
839fcaba MT |
567 | } |
568 | ||
fd312561 | 569 | if (unlikely(!(wr_id & IPOIB_CM_RX_UPDATE_MASK))) { |
d6ef7d68 | 570 | if (p && time_after_eq(jiffies, p->jiffies + IPOIB_CM_RX_UPDATE_TIME)) { |
839fcaba MT |
571 | spin_lock_irqsave(&priv->lock, flags); |
572 | p->jiffies = jiffies; | |
518b1646 MT |
573 | /* Move this entry to list head, but do not re-add it |
574 | * if it has been moved out of list. */ | |
575 | if (p->state == IPOIB_CM_RX_LIVE) | |
839fcaba MT |
576 | list_move(&p->list, &priv->cm.passive_ids); |
577 | spin_unlock_irqrestore(&priv->lock, flags); | |
839fcaba MT |
578 | } |
579 | } | |
580 | ||
1812063b MT |
581 | frags = PAGE_ALIGN(wc->byte_len - min(wc->byte_len, |
582 | (unsigned)IPOIB_CM_HEAD_SIZE)) / PAGE_SIZE; | |
583 | ||
68e995a2 | 584 | newskb = ipoib_cm_alloc_rx_skb(dev, rx_ring, wr_id, frags, mapping); |
1812063b | 585 | if (unlikely(!newskb)) { |
839fcaba MT |
586 | /* |
587 | * If we can't allocate a new RX buffer, dump | |
588 | * this packet and reuse the old buffer. | |
589 | */ | |
590 | ipoib_dbg(priv, "failed to allocate receive buffer %d\n", wr_id); | |
de903512 | 591 | ++dev->stats.rx_dropped; |
839fcaba MT |
592 | goto repost; |
593 | } | |
594 | ||
68e995a2 PS |
595 | ipoib_cm_dma_unmap_rx(priv, frags, rx_ring[wr_id].mapping); |
596 | memcpy(rx_ring[wr_id].mapping, mapping, (frags + 1) * sizeof *mapping); | |
839fcaba MT |
597 | |
598 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", | |
599 | wc->byte_len, wc->slid); | |
600 | ||
1812063b | 601 | skb_put_frags(skb, IPOIB_CM_HEAD_SIZE, wc->byte_len, newskb); |
839fcaba MT |
602 | |
603 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; | |
459a98ed | 604 | skb_reset_mac_header(skb); |
839fcaba MT |
605 | skb_pull(skb, IPOIB_ENCAP_LEN); |
606 | ||
607 | dev->last_rx = jiffies; | |
de903512 RD |
608 | ++dev->stats.rx_packets; |
609 | dev->stats.rx_bytes += skb->len; | |
839fcaba MT |
610 | |
611 | skb->dev = dev; | |
612 | /* XXX get correct PACKET_ type here */ | |
613 | skb->pkt_type = PACKET_HOST; | |
8d1cc86a | 614 | netif_receive_skb(skb); |
839fcaba MT |
615 | |
616 | repost: | |
68e995a2 PS |
617 | if (has_srq) { |
618 | if (unlikely(ipoib_cm_post_receive_srq(dev, wr_id))) | |
619 | ipoib_warn(priv, "ipoib_cm_post_receive_srq failed " | |
620 | "for buf %d\n", wr_id); | |
621 | } else { | |
622 | if (unlikely(ipoib_cm_post_receive_nonsrq(dev, p, wr_id))) { | |
623 | --p->recv_count; | |
624 | ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq failed " | |
625 | "for buf %d\n", wr_id); | |
626 | } | |
627 | } | |
839fcaba MT |
628 | } |
629 | ||
630 | static inline int post_send(struct ipoib_dev_priv *priv, | |
631 | struct ipoib_cm_tx *tx, | |
632 | unsigned int wr_id, | |
633 | u64 addr, int len) | |
634 | { | |
635 | struct ib_send_wr *bad_wr; | |
636 | ||
7143740d EC |
637 | priv->tx_sge[0].addr = addr; |
638 | priv->tx_sge[0].length = len; | |
839fcaba | 639 | |
2337f809 | 640 | priv->tx_wr.wr_id = wr_id | IPOIB_OP_CM; |
839fcaba MT |
641 | |
642 | return ib_post_send(tx->qp, &priv->tx_wr, &bad_wr); | |
643 | } | |
644 | ||
645 | void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx) | |
646 | { | |
647 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
648 | struct ipoib_tx_buf *tx_req; | |
649 | u64 addr; | |
650 | ||
651 | if (unlikely(skb->len > tx->mtu)) { | |
652 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", | |
653 | skb->len, tx->mtu); | |
de903512 RD |
654 | ++dev->stats.tx_dropped; |
655 | ++dev->stats.tx_errors; | |
77d8e1ef | 656 | ipoib_cm_skb_too_long(dev, skb, tx->mtu - IPOIB_ENCAP_LEN); |
839fcaba MT |
657 | return; |
658 | } | |
659 | ||
660 | ipoib_dbg_data(priv, "sending packet: head 0x%x length %d connection 0x%x\n", | |
661 | tx->tx_head, skb->len, tx->qp->qp_num); | |
662 | ||
663 | /* | |
664 | * We put the skb into the tx_ring _before_ we call post_send() | |
665 | * because it's entirely possible that the completion handler will | |
666 | * run before we execute anything after the post_send(). That | |
667 | * means we have to make sure everything is properly recorded and | |
668 | * our state is consistent before we call post_send(). | |
669 | */ | |
670 | tx_req = &tx->tx_ring[tx->tx_head & (ipoib_sendq_size - 1)]; | |
671 | tx_req->skb = skb; | |
672 | addr = ib_dma_map_single(priv->ca, skb->data, skb->len, DMA_TO_DEVICE); | |
673 | if (unlikely(ib_dma_mapping_error(priv->ca, addr))) { | |
de903512 | 674 | ++dev->stats.tx_errors; |
839fcaba MT |
675 | dev_kfree_skb_any(skb); |
676 | return; | |
677 | } | |
678 | ||
7143740d | 679 | tx_req->mapping[0] = addr; |
839fcaba MT |
680 | |
681 | if (unlikely(post_send(priv, tx, tx->tx_head & (ipoib_sendq_size - 1), | |
2337f809 | 682 | addr, skb->len))) { |
839fcaba | 683 | ipoib_warn(priv, "post_send failed\n"); |
de903512 | 684 | ++dev->stats.tx_errors; |
839fcaba MT |
685 | ib_dma_unmap_single(priv->ca, addr, skb->len, DMA_TO_DEVICE); |
686 | dev_kfree_skb_any(skb); | |
687 | } else { | |
688 | dev->trans_start = jiffies; | |
689 | ++tx->tx_head; | |
690 | ||
1b524963 | 691 | if (++priv->tx_outstanding == ipoib_sendq_size) { |
839fcaba MT |
692 | ipoib_dbg(priv, "TX ring 0x%x full, stopping kernel net queue\n", |
693 | tx->qp->qp_num); | |
694 | netif_stop_queue(dev); | |
839fcaba MT |
695 | } |
696 | } | |
697 | } | |
698 | ||
1b524963 | 699 | void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc) |
839fcaba MT |
700 | { |
701 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1b524963 MT |
702 | struct ipoib_cm_tx *tx = wc->qp->qp_context; |
703 | unsigned int wr_id = wc->wr_id & ~IPOIB_OP_CM; | |
839fcaba MT |
704 | struct ipoib_tx_buf *tx_req; |
705 | unsigned long flags; | |
706 | ||
a89875fc RD |
707 | ipoib_dbg_data(priv, "cm send completion: id %d, status: %d\n", |
708 | wr_id, wc->status); | |
839fcaba MT |
709 | |
710 | if (unlikely(wr_id >= ipoib_sendq_size)) { | |
711 | ipoib_warn(priv, "cm send completion event with wrid %d (> %d)\n", | |
712 | wr_id, ipoib_sendq_size); | |
713 | return; | |
714 | } | |
715 | ||
716 | tx_req = &tx->tx_ring[wr_id]; | |
717 | ||
7143740d | 718 | ib_dma_unmap_single(priv->ca, tx_req->mapping[0], tx_req->skb->len, DMA_TO_DEVICE); |
839fcaba MT |
719 | |
720 | /* FIXME: is this right? Shouldn't we only increment on success? */ | |
de903512 RD |
721 | ++dev->stats.tx_packets; |
722 | dev->stats.tx_bytes += tx_req->skb->len; | |
839fcaba MT |
723 | |
724 | dev_kfree_skb_any(tx_req->skb); | |
725 | ||
726 | spin_lock_irqsave(&priv->tx_lock, flags); | |
727 | ++tx->tx_tail; | |
1b524963 MT |
728 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
729 | netif_queue_stopped(dev) && | |
730 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
839fcaba | 731 | netif_wake_queue(dev); |
839fcaba MT |
732 | |
733 | if (wc->status != IB_WC_SUCCESS && | |
734 | wc->status != IB_WC_WR_FLUSH_ERR) { | |
735 | struct ipoib_neigh *neigh; | |
736 | ||
737 | ipoib_dbg(priv, "failed cm send event " | |
738 | "(status=%d, wrid=%d vend_err %x)\n", | |
739 | wc->status, wr_id, wc->vendor_err); | |
740 | ||
741 | spin_lock(&priv->lock); | |
742 | neigh = tx->neigh; | |
743 | ||
744 | if (neigh) { | |
745 | neigh->cm = NULL; | |
746 | list_del(&neigh->list); | |
747 | if (neigh->ah) | |
748 | ipoib_put_ah(neigh->ah); | |
749 | ipoib_neigh_free(dev, neigh); | |
750 | ||
751 | tx->neigh = NULL; | |
752 | } | |
753 | ||
839fcaba MT |
754 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { |
755 | list_move(&tx->list, &priv->cm.reap_list); | |
756 | queue_work(ipoib_workqueue, &priv->cm.reap_task); | |
757 | } | |
758 | ||
759 | clear_bit(IPOIB_FLAG_OPER_UP, &tx->flags); | |
760 | ||
761 | spin_unlock(&priv->lock); | |
762 | } | |
763 | ||
764 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
765 | } | |
766 | ||
839fcaba MT |
767 | int ipoib_cm_dev_open(struct net_device *dev) |
768 | { | |
769 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
770 | int ret; | |
771 | ||
772 | if (!IPOIB_CM_SUPPORTED(dev->dev_addr)) | |
773 | return 0; | |
774 | ||
775 | priv->cm.id = ib_create_cm_id(priv->ca, ipoib_cm_rx_handler, dev); | |
776 | if (IS_ERR(priv->cm.id)) { | |
777 | printk(KERN_WARNING "%s: failed to create CM ID\n", priv->ca->name); | |
347fcfbe | 778 | ret = PTR_ERR(priv->cm.id); |
518b1646 | 779 | goto err_cm; |
839fcaba MT |
780 | } |
781 | ||
782 | ret = ib_cm_listen(priv->cm.id, cpu_to_be64(IPOIB_CM_IETF_ID | priv->qp->qp_num), | |
783 | 0, NULL); | |
784 | if (ret) { | |
785 | printk(KERN_WARNING "%s: failed to listen on ID 0x%llx\n", priv->ca->name, | |
786 | IPOIB_CM_IETF_ID | priv->qp->qp_num); | |
518b1646 | 787 | goto err_listen; |
839fcaba | 788 | } |
518b1646 | 789 | |
839fcaba | 790 | return 0; |
518b1646 MT |
791 | |
792 | err_listen: | |
793 | ib_destroy_cm_id(priv->cm.id); | |
794 | err_cm: | |
795 | priv->cm.id = NULL; | |
518b1646 | 796 | return ret; |
839fcaba MT |
797 | } |
798 | ||
efcd9971 RD |
799 | static void ipoib_cm_free_rx_reap_list(struct net_device *dev) |
800 | { | |
801 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
802 | struct ipoib_cm_rx *rx, *n; | |
803 | LIST_HEAD(list); | |
804 | ||
805 | spin_lock_irq(&priv->lock); | |
806 | list_splice_init(&priv->cm.rx_reap_list, &list); | |
807 | spin_unlock_irq(&priv->lock); | |
808 | ||
809 | list_for_each_entry_safe(rx, n, &list, list) { | |
810 | ib_destroy_cm_id(rx->id); | |
811 | ib_destroy_qp(rx->qp); | |
68e995a2 PS |
812 | if (!ipoib_cm_has_srq(dev)) { |
813 | ipoib_cm_free_rx_ring(priv->dev, rx->rx_ring); | |
814 | spin_lock_irq(&priv->lock); | |
815 | --priv->cm.nonsrq_conn_qp; | |
816 | spin_unlock_irq(&priv->lock); | |
817 | } | |
efcd9971 RD |
818 | kfree(rx); |
819 | } | |
820 | } | |
821 | ||
839fcaba MT |
822 | void ipoib_cm_dev_stop(struct net_device *dev) |
823 | { | |
824 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
efcd9971 | 825 | struct ipoib_cm_rx *p; |
518b1646 | 826 | unsigned long begin; |
518b1646 | 827 | int ret; |
839fcaba | 828 | |
347fcfbe | 829 | if (!IPOIB_CM_SUPPORTED(dev->dev_addr) || !priv->cm.id) |
839fcaba MT |
830 | return; |
831 | ||
832 | ib_destroy_cm_id(priv->cm.id); | |
347fcfbe | 833 | priv->cm.id = NULL; |
518b1646 | 834 | |
37aebbde | 835 | spin_lock_irq(&priv->lock); |
839fcaba MT |
836 | while (!list_empty(&priv->cm.passive_ids)) { |
837 | p = list_entry(priv->cm.passive_ids.next, typeof(*p), list); | |
518b1646 MT |
838 | list_move(&p->list, &priv->cm.rx_error_list); |
839 | p->state = IPOIB_CM_RX_ERROR; | |
37aebbde | 840 | spin_unlock_irq(&priv->lock); |
518b1646 MT |
841 | ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); |
842 | if (ret) | |
843 | ipoib_warn(priv, "unable to move qp to error state: %d\n", ret); | |
844 | spin_lock_irq(&priv->lock); | |
845 | } | |
846 | ||
847 | /* Wait for all RX to be drained */ | |
848 | begin = jiffies; | |
849 | ||
850 | while (!list_empty(&priv->cm.rx_error_list) || | |
851 | !list_empty(&priv->cm.rx_flush_list) || | |
852 | !list_empty(&priv->cm.rx_drain_list)) { | |
8fd357a6 | 853 | if (time_after(jiffies, begin + 5 * HZ)) { |
518b1646 MT |
854 | ipoib_warn(priv, "RX drain timing out\n"); |
855 | ||
856 | /* | |
857 | * assume the HW is wedged and just free up everything. | |
858 | */ | |
ec229e5e PS |
859 | list_splice_init(&priv->cm.rx_flush_list, |
860 | &priv->cm.rx_reap_list); | |
861 | list_splice_init(&priv->cm.rx_error_list, | |
862 | &priv->cm.rx_reap_list); | |
863 | list_splice_init(&priv->cm.rx_drain_list, | |
864 | &priv->cm.rx_reap_list); | |
518b1646 MT |
865 | break; |
866 | } | |
867 | spin_unlock_irq(&priv->lock); | |
868 | msleep(1); | |
2dfbfc37 | 869 | ipoib_drain_cq(dev); |
518b1646 MT |
870 | spin_lock_irq(&priv->lock); |
871 | } | |
872 | ||
518b1646 MT |
873 | spin_unlock_irq(&priv->lock); |
874 | ||
efcd9971 | 875 | ipoib_cm_free_rx_reap_list(dev); |
839fcaba MT |
876 | |
877 | cancel_delayed_work(&priv->cm.stale_task); | |
878 | } | |
879 | ||
880 | static int ipoib_cm_rep_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
881 | { | |
882 | struct ipoib_cm_tx *p = cm_id->context; | |
883 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); | |
884 | struct ipoib_cm_data *data = event->private_data; | |
885 | struct sk_buff_head skqueue; | |
886 | struct ib_qp_attr qp_attr; | |
887 | int qp_attr_mask, ret; | |
888 | struct sk_buff *skb; | |
839fcaba MT |
889 | |
890 | p->mtu = be32_to_cpu(data->mtu); | |
891 | ||
82c3aca6 MT |
892 | if (p->mtu <= IPOIB_ENCAP_LEN) { |
893 | ipoib_warn(priv, "Rejecting connection: mtu %d <= %d\n", | |
894 | p->mtu, IPOIB_ENCAP_LEN); | |
839fcaba MT |
895 | return -EINVAL; |
896 | } | |
897 | ||
898 | qp_attr.qp_state = IB_QPS_RTR; | |
899 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
900 | if (ret) { | |
901 | ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); | |
902 | return ret; | |
903 | } | |
904 | ||
905 | qp_attr.rq_psn = 0 /* FIXME */; | |
906 | ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); | |
907 | if (ret) { | |
908 | ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); | |
909 | return ret; | |
910 | } | |
911 | ||
912 | qp_attr.qp_state = IB_QPS_RTS; | |
913 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
914 | if (ret) { | |
915 | ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); | |
916 | return ret; | |
917 | } | |
918 | ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); | |
919 | if (ret) { | |
920 | ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); | |
921 | return ret; | |
922 | } | |
923 | ||
924 | skb_queue_head_init(&skqueue); | |
925 | ||
37aebbde | 926 | spin_lock_irq(&priv->lock); |
839fcaba MT |
927 | set_bit(IPOIB_FLAG_OPER_UP, &p->flags); |
928 | if (p->neigh) | |
929 | while ((skb = __skb_dequeue(&p->neigh->queue))) | |
930 | __skb_queue_tail(&skqueue, skb); | |
37aebbde | 931 | spin_unlock_irq(&priv->lock); |
839fcaba MT |
932 | |
933 | while ((skb = __skb_dequeue(&skqueue))) { | |
934 | skb->dev = p->dev; | |
935 | if (dev_queue_xmit(skb)) | |
936 | ipoib_warn(priv, "dev_queue_xmit failed " | |
937 | "to requeue packet\n"); | |
938 | } | |
939 | ||
940 | ret = ib_send_cm_rtu(cm_id, NULL, 0); | |
941 | if (ret) { | |
942 | ipoib_warn(priv, "failed to send RTU: %d\n", ret); | |
943 | return ret; | |
944 | } | |
945 | return 0; | |
946 | } | |
947 | ||
1b524963 | 948 | static struct ib_qp *ipoib_cm_create_tx_qp(struct net_device *dev, struct ipoib_cm_tx *tx) |
839fcaba MT |
949 | { |
950 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
ede6bc04 | 951 | struct ib_qp_init_attr attr = { |
1b524963 | 952 | .send_cq = priv->cq, |
ede6bc04 DB |
953 | .recv_cq = priv->cq, |
954 | .srq = priv->cm.srq, | |
955 | .cap.max_send_wr = ipoib_sendq_size, | |
956 | .cap.max_send_sge = 1, | |
957 | .sq_sig_type = IB_SIGNAL_ALL_WR, | |
958 | .qp_type = IB_QPT_RC, | |
1b524963 | 959 | .qp_context = tx |
2337f809 | 960 | }; |
ede6bc04 | 961 | |
839fcaba MT |
962 | return ib_create_qp(priv->pd, &attr); |
963 | } | |
964 | ||
965 | static int ipoib_cm_send_req(struct net_device *dev, | |
966 | struct ib_cm_id *id, struct ib_qp *qp, | |
967 | u32 qpn, | |
968 | struct ib_sa_path_rec *pathrec) | |
969 | { | |
970 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
971 | struct ipoib_cm_data data = {}; | |
972 | struct ib_cm_req_param req = {}; | |
973 | ||
974 | data.qpn = cpu_to_be32(priv->qp->qp_num); | |
975 | data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); | |
976 | ||
2337f809 RD |
977 | req.primary_path = pathrec; |
978 | req.alternate_path = NULL; | |
979 | req.service_id = cpu_to_be64(IPOIB_CM_IETF_ID | qpn); | |
980 | req.qp_num = qp->qp_num; | |
981 | req.qp_type = qp->qp_type; | |
982 | req.private_data = &data; | |
983 | req.private_data_len = sizeof data; | |
984 | req.flow_control = 0; | |
839fcaba | 985 | |
2337f809 | 986 | req.starting_psn = 0; /* FIXME */ |
839fcaba MT |
987 | |
988 | /* | |
989 | * Pick some arbitrary defaults here; we could make these | |
990 | * module parameters if anyone cared about setting them. | |
991 | */ | |
2337f809 RD |
992 | req.responder_resources = 4; |
993 | req.remote_cm_response_timeout = 20; | |
994 | req.local_cm_response_timeout = 20; | |
995 | req.retry_count = 0; /* RFC draft warns against retries */ | |
996 | req.rnr_retry_count = 0; /* RFC draft warns against retries */ | |
997 | req.max_cm_retries = 15; | |
68e995a2 | 998 | req.srq = ipoib_cm_has_srq(dev); |
839fcaba MT |
999 | return ib_send_cm_req(id, &req); |
1000 | } | |
1001 | ||
1002 | static int ipoib_cm_modify_tx_init(struct net_device *dev, | |
1003 | struct ib_cm_id *cm_id, struct ib_qp *qp) | |
1004 | { | |
1005 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1006 | struct ib_qp_attr qp_attr; | |
1007 | int qp_attr_mask, ret; | |
1008 | ret = ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &qp_attr.pkey_index); | |
1009 | if (ret) { | |
1010 | ipoib_warn(priv, "pkey 0x%x not in cache: %d\n", priv->pkey, ret); | |
1011 | return ret; | |
1012 | } | |
1013 | ||
1014 | qp_attr.qp_state = IB_QPS_INIT; | |
1015 | qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE; | |
1016 | qp_attr.port_num = priv->port; | |
1017 | qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
1018 | ||
1019 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); | |
1020 | if (ret) { | |
1021 | ipoib_warn(priv, "failed to modify tx QP to INIT: %d\n", ret); | |
1022 | return ret; | |
1023 | } | |
1024 | return 0; | |
1025 | } | |
1026 | ||
1027 | static int ipoib_cm_tx_init(struct ipoib_cm_tx *p, u32 qpn, | |
1028 | struct ib_sa_path_rec *pathrec) | |
1029 | { | |
1030 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); | |
1031 | int ret; | |
1032 | ||
1033 | p->tx_ring = kzalloc(ipoib_sendq_size * sizeof *p->tx_ring, | |
1034 | GFP_KERNEL); | |
1035 | if (!p->tx_ring) { | |
1036 | ipoib_warn(priv, "failed to allocate tx ring\n"); | |
1037 | ret = -ENOMEM; | |
1038 | goto err_tx; | |
1039 | } | |
1040 | ||
1b524963 | 1041 | p->qp = ipoib_cm_create_tx_qp(p->dev, p); |
839fcaba MT |
1042 | if (IS_ERR(p->qp)) { |
1043 | ret = PTR_ERR(p->qp); | |
1044 | ipoib_warn(priv, "failed to allocate tx qp: %d\n", ret); | |
1045 | goto err_qp; | |
1046 | } | |
1047 | ||
1048 | p->id = ib_create_cm_id(priv->ca, ipoib_cm_tx_handler, p); | |
1049 | if (IS_ERR(p->id)) { | |
1050 | ret = PTR_ERR(p->id); | |
1051 | ipoib_warn(priv, "failed to create tx cm id: %d\n", ret); | |
1052 | goto err_id; | |
1053 | } | |
1054 | ||
1055 | ret = ipoib_cm_modify_tx_init(p->dev, p->id, p->qp); | |
1056 | if (ret) { | |
1057 | ipoib_warn(priv, "failed to modify tx qp to rtr: %d\n", ret); | |
1058 | goto err_modify; | |
1059 | } | |
1060 | ||
1061 | ret = ipoib_cm_send_req(p->dev, p->id, p->qp, qpn, pathrec); | |
1062 | if (ret) { | |
1063 | ipoib_warn(priv, "failed to send cm req: %d\n", ret); | |
1064 | goto err_send_cm; | |
1065 | } | |
1066 | ||
1067 | ipoib_dbg(priv, "Request connection 0x%x for gid " IPOIB_GID_FMT " qpn 0x%x\n", | |
1068 | p->qp->qp_num, IPOIB_GID_ARG(pathrec->dgid), qpn); | |
1069 | ||
1070 | return 0; | |
1071 | ||
1072 | err_send_cm: | |
1073 | err_modify: | |
1074 | ib_destroy_cm_id(p->id); | |
1075 | err_id: | |
1076 | p->id = NULL; | |
1077 | ib_destroy_qp(p->qp); | |
839fcaba MT |
1078 | err_qp: |
1079 | p->qp = NULL; | |
839fcaba MT |
1080 | err_tx: |
1081 | return ret; | |
1082 | } | |
1083 | ||
1084 | static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p) | |
1085 | { | |
1086 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); | |
1087 | struct ipoib_tx_buf *tx_req; | |
1b524963 MT |
1088 | unsigned long flags; |
1089 | unsigned long begin; | |
839fcaba MT |
1090 | |
1091 | ipoib_dbg(priv, "Destroy active connection 0x%x head 0x%x tail 0x%x\n", | |
1092 | p->qp ? p->qp->qp_num : 0, p->tx_head, p->tx_tail); | |
1093 | ||
1094 | if (p->id) | |
1095 | ib_destroy_cm_id(p->id); | |
1096 | ||
839fcaba | 1097 | if (p->tx_ring) { |
1b524963 MT |
1098 | /* Wait for all sends to complete */ |
1099 | begin = jiffies; | |
839fcaba | 1100 | while ((int) p->tx_tail - (int) p->tx_head < 0) { |
1b524963 MT |
1101 | if (time_after(jiffies, begin + 5 * HZ)) { |
1102 | ipoib_warn(priv, "timing out; %d sends not completed\n", | |
1103 | p->tx_head - p->tx_tail); | |
1104 | goto timeout; | |
1105 | } | |
1106 | ||
1107 | msleep(1); | |
839fcaba | 1108 | } |
1b524963 MT |
1109 | } |
1110 | ||
1111 | timeout: | |
839fcaba | 1112 | |
1b524963 MT |
1113 | while ((int) p->tx_tail - (int) p->tx_head < 0) { |
1114 | tx_req = &p->tx_ring[p->tx_tail & (ipoib_sendq_size - 1)]; | |
7143740d | 1115 | ib_dma_unmap_single(priv->ca, tx_req->mapping[0], tx_req->skb->len, |
1b524963 MT |
1116 | DMA_TO_DEVICE); |
1117 | dev_kfree_skb_any(tx_req->skb); | |
1118 | ++p->tx_tail; | |
1119 | spin_lock_irqsave(&priv->tx_lock, flags); | |
1120 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && | |
1121 | netif_queue_stopped(p->dev) && | |
1122 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
1123 | netif_wake_queue(p->dev); | |
1124 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
839fcaba MT |
1125 | } |
1126 | ||
1b524963 MT |
1127 | if (p->qp) |
1128 | ib_destroy_qp(p->qp); | |
1129 | ||
1130 | kfree(p->tx_ring); | |
839fcaba MT |
1131 | kfree(p); |
1132 | } | |
1133 | ||
1134 | static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, | |
1135 | struct ib_cm_event *event) | |
1136 | { | |
1137 | struct ipoib_cm_tx *tx = cm_id->context; | |
1138 | struct ipoib_dev_priv *priv = netdev_priv(tx->dev); | |
1139 | struct net_device *dev = priv->dev; | |
1140 | struct ipoib_neigh *neigh; | |
839fcaba MT |
1141 | int ret; |
1142 | ||
1143 | switch (event->event) { | |
1144 | case IB_CM_DREQ_RECEIVED: | |
1145 | ipoib_dbg(priv, "DREQ received.\n"); | |
1146 | ib_send_cm_drep(cm_id, NULL, 0); | |
1147 | break; | |
1148 | case IB_CM_REP_RECEIVED: | |
1149 | ipoib_dbg(priv, "REP received.\n"); | |
1150 | ret = ipoib_cm_rep_handler(cm_id, event); | |
1151 | if (ret) | |
1152 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, | |
1153 | NULL, 0, NULL, 0); | |
1154 | break; | |
1155 | case IB_CM_REQ_ERROR: | |
1156 | case IB_CM_REJ_RECEIVED: | |
1157 | case IB_CM_TIMEWAIT_EXIT: | |
1158 | ipoib_dbg(priv, "CM error %d.\n", event->event); | |
37aebbde | 1159 | spin_lock_irq(&priv->tx_lock); |
839fcaba MT |
1160 | spin_lock(&priv->lock); |
1161 | neigh = tx->neigh; | |
1162 | ||
1163 | if (neigh) { | |
1164 | neigh->cm = NULL; | |
1165 | list_del(&neigh->list); | |
1166 | if (neigh->ah) | |
1167 | ipoib_put_ah(neigh->ah); | |
1168 | ipoib_neigh_free(dev, neigh); | |
1169 | ||
1170 | tx->neigh = NULL; | |
1171 | } | |
1172 | ||
1173 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { | |
1174 | list_move(&tx->list, &priv->cm.reap_list); | |
1175 | queue_work(ipoib_workqueue, &priv->cm.reap_task); | |
1176 | } | |
1177 | ||
1178 | spin_unlock(&priv->lock); | |
37aebbde | 1179 | spin_unlock_irq(&priv->tx_lock); |
839fcaba MT |
1180 | break; |
1181 | default: | |
1182 | break; | |
1183 | } | |
1184 | ||
1185 | return 0; | |
1186 | } | |
1187 | ||
1188 | struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path, | |
1189 | struct ipoib_neigh *neigh) | |
1190 | { | |
1191 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1192 | struct ipoib_cm_tx *tx; | |
1193 | ||
1194 | tx = kzalloc(sizeof *tx, GFP_ATOMIC); | |
1195 | if (!tx) | |
1196 | return NULL; | |
1197 | ||
1198 | neigh->cm = tx; | |
1199 | tx->neigh = neigh; | |
1200 | tx->path = path; | |
1201 | tx->dev = dev; | |
1202 | list_add(&tx->list, &priv->cm.start_list); | |
1203 | set_bit(IPOIB_FLAG_INITIALIZED, &tx->flags); | |
1204 | queue_work(ipoib_workqueue, &priv->cm.start_task); | |
1205 | return tx; | |
1206 | } | |
1207 | ||
1208 | void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx) | |
1209 | { | |
1210 | struct ipoib_dev_priv *priv = netdev_priv(tx->dev); | |
1211 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { | |
1212 | list_move(&tx->list, &priv->cm.reap_list); | |
1213 | queue_work(ipoib_workqueue, &priv->cm.reap_task); | |
1214 | ipoib_dbg(priv, "Reap connection for gid " IPOIB_GID_FMT "\n", | |
1215 | IPOIB_GID_ARG(tx->neigh->dgid)); | |
1216 | tx->neigh = NULL; | |
1217 | } | |
1218 | } | |
1219 | ||
1220 | static void ipoib_cm_tx_start(struct work_struct *work) | |
1221 | { | |
1222 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
1223 | cm.start_task); | |
1224 | struct net_device *dev = priv->dev; | |
1225 | struct ipoib_neigh *neigh; | |
1226 | struct ipoib_cm_tx *p; | |
1227 | unsigned long flags; | |
1228 | int ret; | |
1229 | ||
1230 | struct ib_sa_path_rec pathrec; | |
1231 | u32 qpn; | |
1232 | ||
1233 | spin_lock_irqsave(&priv->tx_lock, flags); | |
1234 | spin_lock(&priv->lock); | |
1235 | while (!list_empty(&priv->cm.start_list)) { | |
1236 | p = list_entry(priv->cm.start_list.next, typeof(*p), list); | |
1237 | list_del_init(&p->list); | |
1238 | neigh = p->neigh; | |
1239 | qpn = IPOIB_QPN(neigh->neighbour->ha); | |
1240 | memcpy(&pathrec, &p->path->pathrec, sizeof pathrec); | |
1241 | spin_unlock(&priv->lock); | |
1242 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
1243 | ret = ipoib_cm_tx_init(p, qpn, &pathrec); | |
1244 | spin_lock_irqsave(&priv->tx_lock, flags); | |
1245 | spin_lock(&priv->lock); | |
1246 | if (ret) { | |
1247 | neigh = p->neigh; | |
1248 | if (neigh) { | |
1249 | neigh->cm = NULL; | |
1250 | list_del(&neigh->list); | |
1251 | if (neigh->ah) | |
1252 | ipoib_put_ah(neigh->ah); | |
1253 | ipoib_neigh_free(dev, neigh); | |
1254 | } | |
1255 | list_del(&p->list); | |
1256 | kfree(p); | |
1257 | } | |
1258 | } | |
1259 | spin_unlock(&priv->lock); | |
1260 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
1261 | } | |
1262 | ||
1263 | static void ipoib_cm_tx_reap(struct work_struct *work) | |
1264 | { | |
1265 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
1266 | cm.reap_task); | |
1267 | struct ipoib_cm_tx *p; | |
839fcaba | 1268 | |
37aebbde | 1269 | spin_lock_irq(&priv->tx_lock); |
839fcaba MT |
1270 | spin_lock(&priv->lock); |
1271 | while (!list_empty(&priv->cm.reap_list)) { | |
1272 | p = list_entry(priv->cm.reap_list.next, typeof(*p), list); | |
1273 | list_del(&p->list); | |
1274 | spin_unlock(&priv->lock); | |
37aebbde | 1275 | spin_unlock_irq(&priv->tx_lock); |
839fcaba | 1276 | ipoib_cm_tx_destroy(p); |
37aebbde | 1277 | spin_lock_irq(&priv->tx_lock); |
839fcaba MT |
1278 | spin_lock(&priv->lock); |
1279 | } | |
1280 | spin_unlock(&priv->lock); | |
37aebbde | 1281 | spin_unlock_irq(&priv->tx_lock); |
839fcaba MT |
1282 | } |
1283 | ||
1284 | static void ipoib_cm_skb_reap(struct work_struct *work) | |
1285 | { | |
1286 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
1287 | cm.skb_task); | |
839fcaba | 1288 | struct sk_buff *skb; |
839fcaba MT |
1289 | |
1290 | unsigned mtu = priv->mcast_mtu; | |
1291 | ||
37aebbde | 1292 | spin_lock_irq(&priv->tx_lock); |
839fcaba MT |
1293 | spin_lock(&priv->lock); |
1294 | while ((skb = skb_dequeue(&priv->cm.skb_queue))) { | |
1295 | spin_unlock(&priv->lock); | |
37aebbde | 1296 | spin_unlock_irq(&priv->tx_lock); |
839fcaba MT |
1297 | if (skb->protocol == htons(ETH_P_IP)) |
1298 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); | |
1299 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1300 | else if (skb->protocol == htons(ETH_P_IPV6)) | |
20089ca5 | 1301 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, priv->dev); |
839fcaba MT |
1302 | #endif |
1303 | dev_kfree_skb_any(skb); | |
37aebbde | 1304 | spin_lock_irq(&priv->tx_lock); |
839fcaba MT |
1305 | spin_lock(&priv->lock); |
1306 | } | |
1307 | spin_unlock(&priv->lock); | |
37aebbde | 1308 | spin_unlock_irq(&priv->tx_lock); |
839fcaba MT |
1309 | } |
1310 | ||
2337f809 | 1311 | void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb, |
839fcaba MT |
1312 | unsigned int mtu) |
1313 | { | |
1314 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1315 | int e = skb_queue_empty(&priv->cm.skb_queue); | |
1316 | ||
1317 | if (skb->dst) | |
1318 | skb->dst->ops->update_pmtu(skb->dst, mtu); | |
1319 | ||
1320 | skb_queue_tail(&priv->cm.skb_queue, skb); | |
1321 | if (e) | |
1322 | queue_work(ipoib_workqueue, &priv->cm.skb_task); | |
1323 | } | |
1324 | ||
518b1646 MT |
1325 | static void ipoib_cm_rx_reap(struct work_struct *work) |
1326 | { | |
efcd9971 RD |
1327 | ipoib_cm_free_rx_reap_list(container_of(work, struct ipoib_dev_priv, |
1328 | cm.rx_reap_task)->dev); | |
518b1646 MT |
1329 | } |
1330 | ||
839fcaba MT |
1331 | static void ipoib_cm_stale_task(struct work_struct *work) |
1332 | { | |
1333 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
1334 | cm.stale_task.work); | |
1335 | struct ipoib_cm_rx *p; | |
518b1646 | 1336 | int ret; |
839fcaba | 1337 | |
37aebbde | 1338 | spin_lock_irq(&priv->lock); |
839fcaba | 1339 | while (!list_empty(&priv->cm.passive_ids)) { |
518b1646 | 1340 | /* List is sorted by LRU, start from tail, |
839fcaba MT |
1341 | * stop when we see a recently used entry */ |
1342 | p = list_entry(priv->cm.passive_ids.prev, typeof(*p), list); | |
60a596da | 1343 | if (time_before_eq(jiffies, p->jiffies + IPOIB_CM_RX_TIMEOUT)) |
839fcaba | 1344 | break; |
518b1646 MT |
1345 | list_move(&p->list, &priv->cm.rx_error_list); |
1346 | p->state = IPOIB_CM_RX_ERROR; | |
37aebbde | 1347 | spin_unlock_irq(&priv->lock); |
518b1646 MT |
1348 | ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); |
1349 | if (ret) | |
1350 | ipoib_warn(priv, "unable to move qp to error state: %d\n", ret); | |
37aebbde | 1351 | spin_lock_irq(&priv->lock); |
839fcaba | 1352 | } |
7c5b9ef8 MT |
1353 | |
1354 | if (!list_empty(&priv->cm.passive_ids)) | |
1355 | queue_delayed_work(ipoib_workqueue, | |
1356 | &priv->cm.stale_task, IPOIB_CM_RX_DELAY); | |
37aebbde | 1357 | spin_unlock_irq(&priv->lock); |
839fcaba MT |
1358 | } |
1359 | ||
1360 | ||
2337f809 | 1361 | static ssize_t show_mode(struct device *d, struct device_attribute *attr, |
839fcaba MT |
1362 | char *buf) |
1363 | { | |
1364 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(d)); | |
1365 | ||
1366 | if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) | |
1367 | return sprintf(buf, "connected\n"); | |
1368 | else | |
1369 | return sprintf(buf, "datagram\n"); | |
1370 | } | |
1371 | ||
1372 | static ssize_t set_mode(struct device *d, struct device_attribute *attr, | |
1373 | const char *buf, size_t count) | |
1374 | { | |
1375 | struct net_device *dev = to_net_dev(d); | |
1376 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1377 | ||
1378 | /* flush paths if we switch modes so that connections are restarted */ | |
1379 | if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) { | |
1380 | set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
1381 | ipoib_warn(priv, "enabling connected mode " | |
1382 | "will cause multicast packet drops\n"); | |
1383 | ipoib_flush_paths(dev); | |
1384 | return count; | |
1385 | } | |
1386 | ||
1387 | if (!strcmp(buf, "datagram\n")) { | |
1388 | clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
1389 | dev->mtu = min(priv->mcast_mtu, dev->mtu); | |
1390 | ipoib_flush_paths(dev); | |
1391 | return count; | |
1392 | } | |
1393 | ||
1394 | return -EINVAL; | |
1395 | } | |
1396 | ||
551fd612 | 1397 | static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO, show_mode, set_mode); |
839fcaba MT |
1398 | |
1399 | int ipoib_cm_add_mode_attr(struct net_device *dev) | |
1400 | { | |
1401 | return device_create_file(&dev->dev, &dev_attr_mode); | |
1402 | } | |
1403 | ||
586a6934 | 1404 | static void ipoib_cm_create_srq(struct net_device *dev, int max_sge) |
839fcaba MT |
1405 | { |
1406 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1407 | struct ib_srq_init_attr srq_init_attr = { | |
1408 | .attr = { | |
1409 | .max_wr = ipoib_recvq_size, | |
586a6934 | 1410 | .max_sge = max_sge |
839fcaba MT |
1411 | } |
1412 | }; | |
7b3687df RD |
1413 | |
1414 | priv->cm.srq = ib_create_srq(priv->pd, &srq_init_attr); | |
1415 | if (IS_ERR(priv->cm.srq)) { | |
68e995a2 PS |
1416 | if (PTR_ERR(priv->cm.srq) != -ENOSYS) |
1417 | printk(KERN_WARNING "%s: failed to allocate SRQ, error %ld\n", | |
1418 | priv->ca->name, PTR_ERR(priv->cm.srq)); | |
7b3687df | 1419 | priv->cm.srq = NULL; |
68e995a2 | 1420 | return; |
7b3687df RD |
1421 | } |
1422 | ||
1423 | priv->cm.srq_ring = kzalloc(ipoib_recvq_size * sizeof *priv->cm.srq_ring, | |
1424 | GFP_KERNEL); | |
1425 | if (!priv->cm.srq_ring) { | |
68e995a2 | 1426 | printk(KERN_WARNING "%s: failed to allocate CM SRQ ring (%d entries)\n", |
7b3687df RD |
1427 | priv->ca->name, ipoib_recvq_size); |
1428 | ib_destroy_srq(priv->cm.srq); | |
1429 | priv->cm.srq = NULL; | |
7b3687df | 1430 | } |
7b3687df RD |
1431 | } |
1432 | ||
1433 | int ipoib_cm_dev_init(struct net_device *dev) | |
1434 | { | |
1435 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
586a6934 PS |
1436 | int i, ret; |
1437 | struct ib_device_attr attr; | |
839fcaba MT |
1438 | |
1439 | INIT_LIST_HEAD(&priv->cm.passive_ids); | |
1440 | INIT_LIST_HEAD(&priv->cm.reap_list); | |
1441 | INIT_LIST_HEAD(&priv->cm.start_list); | |
518b1646 MT |
1442 | INIT_LIST_HEAD(&priv->cm.rx_error_list); |
1443 | INIT_LIST_HEAD(&priv->cm.rx_flush_list); | |
1444 | INIT_LIST_HEAD(&priv->cm.rx_drain_list); | |
1445 | INIT_LIST_HEAD(&priv->cm.rx_reap_list); | |
839fcaba MT |
1446 | INIT_WORK(&priv->cm.start_task, ipoib_cm_tx_start); |
1447 | INIT_WORK(&priv->cm.reap_task, ipoib_cm_tx_reap); | |
1448 | INIT_WORK(&priv->cm.skb_task, ipoib_cm_skb_reap); | |
518b1646 | 1449 | INIT_WORK(&priv->cm.rx_reap_task, ipoib_cm_rx_reap); |
839fcaba MT |
1450 | INIT_DELAYED_WORK(&priv->cm.stale_task, ipoib_cm_stale_task); |
1451 | ||
1452 | skb_queue_head_init(&priv->cm.skb_queue); | |
1453 | ||
586a6934 PS |
1454 | ret = ib_query_device(priv->ca, &attr); |
1455 | if (ret) { | |
1456 | printk(KERN_WARNING "ib_query_device() failed with %d\n", ret); | |
1457 | return ret; | |
1458 | } | |
1459 | ||
1460 | ipoib_dbg(priv, "max_srq_sge=%d\n", attr.max_srq_sge); | |
1461 | ||
1462 | attr.max_srq_sge = min_t(int, IPOIB_CM_RX_SG, attr.max_srq_sge); | |
1463 | ipoib_cm_create_srq(dev, attr.max_srq_sge); | |
1464 | if (ipoib_cm_has_srq(dev)) { | |
1465 | priv->cm.max_cm_mtu = attr.max_srq_sge * PAGE_SIZE - 0x10; | |
1466 | priv->cm.num_frags = attr.max_srq_sge; | |
1467 | ipoib_dbg(priv, "max_cm_mtu = 0x%x, num_frags=%d\n", | |
1468 | priv->cm.max_cm_mtu, priv->cm.num_frags); | |
1469 | } else { | |
1470 | priv->cm.max_cm_mtu = IPOIB_CM_MTU; | |
1471 | priv->cm.num_frags = IPOIB_CM_RX_SG; | |
1472 | } | |
1473 | ||
1474 | for (i = 0; i < priv->cm.num_frags; ++i) | |
839fcaba MT |
1475 | priv->cm.rx_sge[i].lkey = priv->mr->lkey; |
1476 | ||
1477 | priv->cm.rx_sge[0].length = IPOIB_CM_HEAD_SIZE; | |
586a6934 | 1478 | for (i = 1; i < priv->cm.num_frags; ++i) |
839fcaba MT |
1479 | priv->cm.rx_sge[i].length = PAGE_SIZE; |
1480 | priv->cm.rx_wr.next = NULL; | |
1481 | priv->cm.rx_wr.sg_list = priv->cm.rx_sge; | |
586a6934 | 1482 | priv->cm.rx_wr.num_sge = priv->cm.num_frags; |
68e995a2 PS |
1483 | |
1484 | if (ipoib_cm_has_srq(dev)) { | |
1485 | for (i = 0; i < ipoib_recvq_size; ++i) { | |
1486 | if (!ipoib_cm_alloc_rx_skb(dev, priv->cm.srq_ring, i, | |
586a6934 | 1487 | priv->cm.num_frags - 1, |
68e995a2 PS |
1488 | priv->cm.srq_ring[i].mapping)) { |
1489 | ipoib_warn(priv, "failed to allocate " | |
1490 | "receive buffer %d\n", i); | |
1491 | ipoib_cm_dev_cleanup(dev); | |
1492 | return -ENOMEM; | |
1493 | } | |
7b3687df | 1494 | |
68e995a2 PS |
1495 | if (ipoib_cm_post_receive_srq(dev, i)) { |
1496 | ipoib_warn(priv, "ipoib_cm_post_receive_srq " | |
1497 | "failed for buf %d\n", i); | |
1498 | ipoib_cm_dev_cleanup(dev); | |
1499 | return -EIO; | |
1500 | } | |
839fcaba MT |
1501 | } |
1502 | } | |
1503 | ||
1504 | priv->dev->dev_addr[0] = IPOIB_FLAGS_RC; | |
1505 | return 0; | |
1506 | } | |
1507 | ||
1508 | void ipoib_cm_dev_cleanup(struct net_device *dev) | |
1509 | { | |
1510 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1efb6144 | 1511 | int ret; |
839fcaba MT |
1512 | |
1513 | if (!priv->cm.srq) | |
1514 | return; | |
1515 | ||
1516 | ipoib_dbg(priv, "Cleanup ipoib connected mode.\n"); | |
1517 | ||
1518 | ret = ib_destroy_srq(priv->cm.srq); | |
1519 | if (ret) | |
1520 | ipoib_warn(priv, "ib_destroy_srq failed: %d\n", ret); | |
1521 | ||
1522 | priv->cm.srq = NULL; | |
1523 | if (!priv->cm.srq_ring) | |
1524 | return; | |
1efb6144 RD |
1525 | |
1526 | ipoib_cm_free_rx_ring(dev, priv->cm.srq_ring); | |
839fcaba MT |
1527 | priv->cm.srq_ring = NULL; |
1528 | } |