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. | |
839fcaba MT |
31 | */ |
32 | ||
33 | #include <rdma/ib_cm.h> | |
34 | #include <rdma/ib_cache.h> | |
35 | #include <net/dst.h> | |
36 | #include <net/icmp.h> | |
37 | #include <linux/icmpv6.h> | |
518b1646 | 38 | #include <linux/delay.h> |
10313cbb | 39 | #include <linux/vmalloc.h> |
839fcaba | 40 | |
68e995a2 PS |
41 | #include "ipoib.h" |
42 | ||
43 | int ipoib_max_conn_qp = 128; | |
44 | ||
45 | module_param_named(max_nonsrq_conn_qp, ipoib_max_conn_qp, int, 0444); | |
46 | MODULE_PARM_DESC(max_nonsrq_conn_qp, | |
47 | "Max number of connected-mode QPs per interface " | |
48 | "(applied only if shared receive queue is not available)"); | |
49 | ||
839fcaba MT |
50 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA |
51 | static int data_debug_level; | |
52 | ||
53 | module_param_named(cm_data_debug_level, data_debug_level, int, 0644); | |
54 | MODULE_PARM_DESC(cm_data_debug_level, | |
55 | "Enable data path debug tracing for connected mode if > 0"); | |
56 | #endif | |
57 | ||
839fcaba MT |
58 | #define IPOIB_CM_IETF_ID 0x1000000000000000ULL |
59 | ||
60 | #define IPOIB_CM_RX_UPDATE_TIME (256 * HZ) | |
61 | #define IPOIB_CM_RX_TIMEOUT (2 * 256 * HZ) | |
62 | #define IPOIB_CM_RX_DELAY (3 * 256 * HZ) | |
63 | #define IPOIB_CM_RX_UPDATE_MASK (0x3) | |
64 | ||
518b1646 MT |
65 | static struct ib_qp_attr ipoib_cm_err_attr = { |
66 | .qp_state = IB_QPS_ERR | |
67 | }; | |
68 | ||
09f60f8f | 69 | #define IPOIB_CM_RX_DRAIN_WRID 0xffffffff |
518b1646 | 70 | |
ec56dc0b MT |
71 | static struct ib_send_wr ipoib_cm_rx_drain_wr = { |
72 | .wr_id = IPOIB_CM_RX_DRAIN_WRID, | |
73 | .opcode = IB_WR_SEND, | |
518b1646 MT |
74 | }; |
75 | ||
839fcaba MT |
76 | static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, |
77 | struct ib_cm_event *event); | |
78 | ||
1812063b | 79 | static void ipoib_cm_dma_unmap_rx(struct ipoib_dev_priv *priv, int frags, |
839fcaba MT |
80 | u64 mapping[IPOIB_CM_RX_SG]) |
81 | { | |
82 | int i; | |
83 | ||
84 | ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_CM_HEAD_SIZE, DMA_FROM_DEVICE); | |
85 | ||
1812063b | 86 | for (i = 0; i < frags; ++i) |
839fcaba MT |
87 | ib_dma_unmap_single(priv->ca, mapping[i + 1], PAGE_SIZE, DMA_FROM_DEVICE); |
88 | } | |
89 | ||
68e995a2 | 90 | static int ipoib_cm_post_receive_srq(struct net_device *dev, int id) |
839fcaba MT |
91 | { |
92 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
93 | struct ib_recv_wr *bad_wr; | |
94 | int i, ret; | |
95 | ||
1b524963 | 96 | priv->cm.rx_wr.wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV; |
839fcaba | 97 | |
586a6934 | 98 | for (i = 0; i < priv->cm.num_frags; ++i) |
839fcaba MT |
99 | priv->cm.rx_sge[i].addr = priv->cm.srq_ring[id].mapping[i]; |
100 | ||
101 | ret = ib_post_srq_recv(priv->cm.srq, &priv->cm.rx_wr, &bad_wr); | |
102 | if (unlikely(ret)) { | |
103 | ipoib_warn(priv, "post srq failed for buf %d (%d)\n", id, ret); | |
586a6934 | 104 | ipoib_cm_dma_unmap_rx(priv, priv->cm.num_frags - 1, |
1812063b | 105 | priv->cm.srq_ring[id].mapping); |
839fcaba MT |
106 | dev_kfree_skb_any(priv->cm.srq_ring[id].skb); |
107 | priv->cm.srq_ring[id].skb = NULL; | |
108 | } | |
109 | ||
110 | return ret; | |
111 | } | |
112 | ||
68e995a2 | 113 | static int ipoib_cm_post_receive_nonsrq(struct net_device *dev, |
a7d834c4 RD |
114 | struct ipoib_cm_rx *rx, |
115 | struct ib_recv_wr *wr, | |
116 | struct ib_sge *sge, int id) | |
68e995a2 PS |
117 | { |
118 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
119 | struct ib_recv_wr *bad_wr; | |
120 | int i, ret; | |
121 | ||
a7d834c4 | 122 | wr->wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV; |
68e995a2 PS |
123 | |
124 | for (i = 0; i < IPOIB_CM_RX_SG; ++i) | |
a7d834c4 | 125 | sge[i].addr = rx->rx_ring[id].mapping[i]; |
68e995a2 | 126 | |
a7d834c4 | 127 | ret = ib_post_recv(rx->qp, wr, &bad_wr); |
68e995a2 PS |
128 | if (unlikely(ret)) { |
129 | ipoib_warn(priv, "post recv failed for buf %d (%d)\n", id, ret); | |
130 | ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1, | |
131 | rx->rx_ring[id].mapping); | |
132 | dev_kfree_skb_any(rx->rx_ring[id].skb); | |
133 | rx->rx_ring[id].skb = NULL; | |
134 | } | |
135 | ||
136 | return ret; | |
137 | } | |
138 | ||
139 | static struct sk_buff *ipoib_cm_alloc_rx_skb(struct net_device *dev, | |
140 | struct ipoib_cm_rx_buf *rx_ring, | |
141 | int id, int frags, | |
1812063b | 142 | u64 mapping[IPOIB_CM_RX_SG]) |
839fcaba MT |
143 | { |
144 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
145 | struct sk_buff *skb; | |
146 | int i; | |
147 | ||
148 | skb = dev_alloc_skb(IPOIB_CM_HEAD_SIZE + 12); | |
149 | if (unlikely(!skb)) | |
1812063b | 150 | return NULL; |
839fcaba MT |
151 | |
152 | /* | |
153 | * IPoIB adds a 4 byte header. So we need 12 more bytes to align the | |
154 | * IP header to a multiple of 16. | |
155 | */ | |
156 | skb_reserve(skb, 12); | |
157 | ||
158 | mapping[0] = ib_dma_map_single(priv->ca, skb->data, IPOIB_CM_HEAD_SIZE, | |
159 | DMA_FROM_DEVICE); | |
160 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0]))) { | |
161 | dev_kfree_skb_any(skb); | |
1812063b | 162 | return NULL; |
839fcaba MT |
163 | } |
164 | ||
1812063b | 165 | for (i = 0; i < frags; i++) { |
839fcaba MT |
166 | struct page *page = alloc_page(GFP_ATOMIC); |
167 | ||
168 | if (!page) | |
169 | goto partial_error; | |
170 | skb_fill_page_desc(skb, i, page, 0, PAGE_SIZE); | |
171 | ||
172 | mapping[i + 1] = ib_dma_map_page(priv->ca, skb_shinfo(skb)->frags[i].page, | |
6371ea3d | 173 | 0, PAGE_SIZE, DMA_FROM_DEVICE); |
839fcaba MT |
174 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[i + 1]))) |
175 | goto partial_error; | |
176 | } | |
177 | ||
68e995a2 | 178 | rx_ring[id].skb = skb; |
1812063b | 179 | return skb; |
839fcaba MT |
180 | |
181 | partial_error: | |
182 | ||
183 | ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_CM_HEAD_SIZE, DMA_FROM_DEVICE); | |
184 | ||
841adfca RC |
185 | for (; i > 0; --i) |
186 | ib_dma_unmap_single(priv->ca, mapping[i], PAGE_SIZE, DMA_FROM_DEVICE); | |
839fcaba | 187 | |
8a2e65f8 | 188 | dev_kfree_skb_any(skb); |
1812063b | 189 | return NULL; |
839fcaba MT |
190 | } |
191 | ||
1efb6144 RD |
192 | static void ipoib_cm_free_rx_ring(struct net_device *dev, |
193 | struct ipoib_cm_rx_buf *rx_ring) | |
194 | { | |
195 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
196 | int i; | |
197 | ||
198 | for (i = 0; i < ipoib_recvq_size; ++i) | |
199 | if (rx_ring[i].skb) { | |
200 | ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1, | |
201 | rx_ring[i].mapping); | |
202 | dev_kfree_skb_any(rx_ring[i].skb); | |
203 | } | |
204 | ||
205 | kfree(rx_ring); | |
206 | } | |
207 | ||
2337f809 | 208 | static void ipoib_cm_start_rx_drain(struct ipoib_dev_priv *priv) |
518b1646 | 209 | { |
ec56dc0b MT |
210 | struct ib_send_wr *bad_wr; |
211 | struct ipoib_cm_rx *p; | |
518b1646 | 212 | |
ec56dc0b | 213 | /* We only reserved 1 extra slot in CQ for drain WRs, so |
518b1646 MT |
214 | * make sure we have at most 1 outstanding WR. */ |
215 | if (list_empty(&priv->cm.rx_flush_list) || | |
216 | !list_empty(&priv->cm.rx_drain_list)) | |
217 | return; | |
218 | ||
ec56dc0b MT |
219 | /* |
220 | * QPs on flush list are error state. This way, a "flush | |
221 | * error" WC will be immediately generated for each WR we post. | |
222 | */ | |
223 | p = list_entry(priv->cm.rx_flush_list.next, typeof(*p), list); | |
224 | if (ib_post_send(p->qp, &ipoib_cm_rx_drain_wr, &bad_wr)) | |
225 | ipoib_warn(priv, "failed to post drain wr\n"); | |
518b1646 MT |
226 | |
227 | list_splice_init(&priv->cm.rx_flush_list, &priv->cm.rx_drain_list); | |
228 | } | |
229 | ||
230 | static void ipoib_cm_rx_event_handler(struct ib_event *event, void *ctx) | |
231 | { | |
232 | struct ipoib_cm_rx *p = ctx; | |
233 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); | |
234 | unsigned long flags; | |
235 | ||
236 | if (event->event != IB_EVENT_QP_LAST_WQE_REACHED) | |
237 | return; | |
238 | ||
239 | spin_lock_irqsave(&priv->lock, flags); | |
240 | list_move(&p->list, &priv->cm.rx_flush_list); | |
241 | p->state = IPOIB_CM_RX_FLUSH; | |
242 | ipoib_cm_start_rx_drain(priv); | |
243 | spin_unlock_irqrestore(&priv->lock, flags); | |
244 | } | |
245 | ||
839fcaba MT |
246 | static struct ib_qp *ipoib_cm_create_rx_qp(struct net_device *dev, |
247 | struct ipoib_cm_rx *p) | |
248 | { | |
249 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
250 | struct ib_qp_init_attr attr = { | |
518b1646 | 251 | .event_handler = ipoib_cm_rx_event_handler, |
f56bcd80 EC |
252 | .send_cq = priv->recv_cq, /* For drain WR */ |
253 | .recv_cq = priv->recv_cq, | |
839fcaba | 254 | .srq = priv->cm.srq, |
ec56dc0b | 255 | .cap.max_send_wr = 1, /* For drain WR */ |
839fcaba MT |
256 | .cap.max_send_sge = 1, /* FIXME: 0 Seems not to work */ |
257 | .sq_sig_type = IB_SIGNAL_ALL_WR, | |
258 | .qp_type = IB_QPT_RC, | |
259 | .qp_context = p, | |
260 | }; | |
68e995a2 PS |
261 | |
262 | if (!ipoib_cm_has_srq(dev)) { | |
263 | attr.cap.max_recv_wr = ipoib_recvq_size; | |
264 | attr.cap.max_recv_sge = IPOIB_CM_RX_SG; | |
265 | } | |
266 | ||
839fcaba MT |
267 | return ib_create_qp(priv->pd, &attr); |
268 | } | |
269 | ||
270 | static int ipoib_cm_modify_rx_qp(struct net_device *dev, | |
68e995a2 PS |
271 | struct ib_cm_id *cm_id, struct ib_qp *qp, |
272 | unsigned psn) | |
839fcaba MT |
273 | { |
274 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
275 | struct ib_qp_attr qp_attr; | |
276 | int qp_attr_mask, ret; | |
277 | ||
278 | qp_attr.qp_state = IB_QPS_INIT; | |
279 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
280 | if (ret) { | |
281 | ipoib_warn(priv, "failed to init QP attr for INIT: %d\n", ret); | |
282 | return ret; | |
283 | } | |
284 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); | |
285 | if (ret) { | |
286 | ipoib_warn(priv, "failed to modify QP to INIT: %d\n", ret); | |
287 | return ret; | |
288 | } | |
289 | qp_attr.qp_state = IB_QPS_RTR; | |
290 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
291 | if (ret) { | |
292 | ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); | |
293 | return ret; | |
294 | } | |
295 | qp_attr.rq_psn = psn; | |
296 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); | |
297 | if (ret) { | |
298 | ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); | |
299 | return ret; | |
300 | } | |
ec56dc0b MT |
301 | |
302 | /* | |
303 | * Current Mellanox HCA firmware won't generate completions | |
304 | * with error for drain WRs unless the QP has been moved to | |
305 | * RTS first. This work-around leaves a window where a QP has | |
306 | * moved to error asynchronously, but this will eventually get | |
307 | * fixed in firmware, so let's not error out if modify QP | |
308 | * fails. | |
309 | */ | |
310 | qp_attr.qp_state = IB_QPS_RTS; | |
311 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
312 | if (ret) { | |
313 | ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); | |
314 | return 0; | |
315 | } | |
316 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); | |
317 | if (ret) { | |
318 | ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); | |
319 | return 0; | |
320 | } | |
321 | ||
839fcaba MT |
322 | return 0; |
323 | } | |
324 | ||
a7d834c4 RD |
325 | static void ipoib_cm_init_rx_wr(struct net_device *dev, |
326 | struct ib_recv_wr *wr, | |
327 | struct ib_sge *sge) | |
328 | { | |
329 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
330 | int i; | |
331 | ||
332 | for (i = 0; i < priv->cm.num_frags; ++i) | |
333 | sge[i].lkey = priv->mr->lkey; | |
334 | ||
335 | sge[0].length = IPOIB_CM_HEAD_SIZE; | |
336 | for (i = 1; i < priv->cm.num_frags; ++i) | |
337 | sge[i].length = PAGE_SIZE; | |
338 | ||
339 | wr->next = NULL; | |
e0819816 | 340 | wr->sg_list = sge; |
a7d834c4 RD |
341 | wr->num_sge = priv->cm.num_frags; |
342 | } | |
343 | ||
68e995a2 PS |
344 | static int ipoib_cm_nonsrq_init_rx(struct net_device *dev, struct ib_cm_id *cm_id, |
345 | struct ipoib_cm_rx *rx) | |
346 | { | |
347 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
a7d834c4 RD |
348 | struct { |
349 | struct ib_recv_wr wr; | |
350 | struct ib_sge sge[IPOIB_CM_RX_SG]; | |
351 | } *t; | |
68e995a2 PS |
352 | int ret; |
353 | int i; | |
354 | ||
355 | rx->rx_ring = kcalloc(ipoib_recvq_size, sizeof *rx->rx_ring, GFP_KERNEL); | |
356 | if (!rx->rx_ring) | |
357 | return -ENOMEM; | |
358 | ||
a7d834c4 RD |
359 | t = kmalloc(sizeof *t, GFP_KERNEL); |
360 | if (!t) { | |
361 | ret = -ENOMEM; | |
362 | goto err_free; | |
363 | } | |
364 | ||
365 | ipoib_cm_init_rx_wr(dev, &t->wr, t->sge); | |
366 | ||
68e995a2 PS |
367 | spin_lock_irq(&priv->lock); |
368 | ||
369 | if (priv->cm.nonsrq_conn_qp >= ipoib_max_conn_qp) { | |
370 | spin_unlock_irq(&priv->lock); | |
371 | ib_send_cm_rej(cm_id, IB_CM_REJ_NO_QP, NULL, 0, NULL, 0); | |
372 | ret = -EINVAL; | |
373 | goto err_free; | |
374 | } else | |
375 | ++priv->cm.nonsrq_conn_qp; | |
376 | ||
377 | spin_unlock_irq(&priv->lock); | |
378 | ||
379 | for (i = 0; i < ipoib_recvq_size; ++i) { | |
380 | if (!ipoib_cm_alloc_rx_skb(dev, rx->rx_ring, i, IPOIB_CM_RX_SG - 1, | |
381 | rx->rx_ring[i].mapping)) { | |
382 | ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); | |
383 | ret = -ENOMEM; | |
384 | goto err_count; | |
a7d834c4 RD |
385 | } |
386 | ret = ipoib_cm_post_receive_nonsrq(dev, rx, &t->wr, t->sge, i); | |
68e995a2 PS |
387 | if (ret) { |
388 | ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq " | |
389 | "failed for buf %d\n", i); | |
390 | ret = -EIO; | |
391 | goto err_count; | |
392 | } | |
393 | } | |
394 | ||
395 | rx->recv_count = ipoib_recvq_size; | |
396 | ||
a7d834c4 RD |
397 | kfree(t); |
398 | ||
68e995a2 PS |
399 | return 0; |
400 | ||
401 | err_count: | |
402 | spin_lock_irq(&priv->lock); | |
403 | --priv->cm.nonsrq_conn_qp; | |
404 | spin_unlock_irq(&priv->lock); | |
405 | ||
406 | err_free: | |
a7d834c4 | 407 | kfree(t); |
68e995a2 PS |
408 | ipoib_cm_free_rx_ring(dev, rx->rx_ring); |
409 | ||
410 | return ret; | |
411 | } | |
412 | ||
839fcaba MT |
413 | static int ipoib_cm_send_rep(struct net_device *dev, struct ib_cm_id *cm_id, |
414 | struct ib_qp *qp, struct ib_cm_req_event_param *req, | |
415 | unsigned psn) | |
416 | { | |
417 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
418 | struct ipoib_cm_data data = {}; | |
419 | struct ib_cm_rep_param rep = {}; | |
420 | ||
421 | data.qpn = cpu_to_be32(priv->qp->qp_num); | |
422 | data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); | |
423 | ||
424 | rep.private_data = &data; | |
425 | rep.private_data_len = sizeof data; | |
426 | rep.flow_control = 0; | |
427 | rep.rnr_retry_count = req->rnr_retry_count; | |
68e995a2 | 428 | rep.srq = ipoib_cm_has_srq(dev); |
839fcaba MT |
429 | rep.qp_num = qp->qp_num; |
430 | rep.starting_psn = psn; | |
431 | return ib_send_cm_rep(cm_id, &rep); | |
432 | } | |
433 | ||
434 | static int ipoib_cm_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
435 | { | |
436 | struct net_device *dev = cm_id->context; | |
437 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
438 | struct ipoib_cm_rx *p; | |
839fcaba MT |
439 | unsigned psn; |
440 | int ret; | |
441 | ||
442 | ipoib_dbg(priv, "REQ arrived\n"); | |
443 | p = kzalloc(sizeof *p, GFP_KERNEL); | |
444 | if (!p) | |
445 | return -ENOMEM; | |
446 | p->dev = dev; | |
447 | p->id = cm_id; | |
3ec7393a MT |
448 | cm_id->context = p; |
449 | p->state = IPOIB_CM_RX_LIVE; | |
450 | p->jiffies = jiffies; | |
451 | INIT_LIST_HEAD(&p->list); | |
452 | ||
839fcaba MT |
453 | p->qp = ipoib_cm_create_rx_qp(dev, p); |
454 | if (IS_ERR(p->qp)) { | |
455 | ret = PTR_ERR(p->qp); | |
456 | goto err_qp; | |
457 | } | |
458 | ||
459 | psn = random32() & 0xffffff; | |
460 | ret = ipoib_cm_modify_rx_qp(dev, cm_id, p->qp, psn); | |
461 | if (ret) | |
462 | goto err_modify; | |
463 | ||
68e995a2 PS |
464 | if (!ipoib_cm_has_srq(dev)) { |
465 | ret = ipoib_cm_nonsrq_init_rx(dev, cm_id, p); | |
466 | if (ret) | |
467 | goto err_modify; | |
468 | } | |
469 | ||
3ec7393a MT |
470 | spin_lock_irq(&priv->lock); |
471 | queue_delayed_work(ipoib_workqueue, | |
472 | &priv->cm.stale_task, IPOIB_CM_RX_DELAY); | |
473 | /* Add this entry to passive ids list head, but do not re-add it | |
474 | * if IB_EVENT_QP_LAST_WQE_REACHED has moved it to flush list. */ | |
475 | p->jiffies = jiffies; | |
476 | if (p->state == IPOIB_CM_RX_LIVE) | |
477 | list_move(&p->list, &priv->cm.passive_ids); | |
478 | spin_unlock_irq(&priv->lock); | |
479 | ||
839fcaba MT |
480 | ret = ipoib_cm_send_rep(dev, cm_id, p->qp, &event->param.req_rcvd, psn); |
481 | if (ret) { | |
482 | ipoib_warn(priv, "failed to send REP: %d\n", ret); | |
3ec7393a MT |
483 | if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) |
484 | ipoib_warn(priv, "unable to move qp to error state\n"); | |
839fcaba | 485 | } |
839fcaba MT |
486 | return 0; |
487 | ||
839fcaba MT |
488 | err_modify: |
489 | ib_destroy_qp(p->qp); | |
490 | err_qp: | |
491 | kfree(p); | |
492 | return ret; | |
493 | } | |
494 | ||
495 | static int ipoib_cm_rx_handler(struct ib_cm_id *cm_id, | |
496 | struct ib_cm_event *event) | |
497 | { | |
498 | struct ipoib_cm_rx *p; | |
499 | struct ipoib_dev_priv *priv; | |
839fcaba MT |
500 | |
501 | switch (event->event) { | |
502 | case IB_CM_REQ_RECEIVED: | |
503 | return ipoib_cm_req_handler(cm_id, event); | |
504 | case IB_CM_DREQ_RECEIVED: | |
505 | p = cm_id->context; | |
506 | ib_send_cm_drep(cm_id, NULL, 0); | |
507 | /* Fall through */ | |
508 | case IB_CM_REJ_RECEIVED: | |
509 | p = cm_id->context; | |
510 | priv = netdev_priv(p->dev); | |
518b1646 MT |
511 | if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) |
512 | ipoib_warn(priv, "unable to move qp to error state\n"); | |
513 | /* Fall through */ | |
839fcaba MT |
514 | default: |
515 | return 0; | |
516 | } | |
517 | } | |
518 | /* Adjust length of skb with fragments to match received data */ | |
519 | static void skb_put_frags(struct sk_buff *skb, unsigned int hdr_space, | |
1812063b | 520 | unsigned int length, struct sk_buff *toskb) |
839fcaba MT |
521 | { |
522 | int i, num_frags; | |
523 | unsigned int size; | |
524 | ||
525 | /* put header into skb */ | |
526 | size = min(length, hdr_space); | |
527 | skb->tail += size; | |
528 | skb->len += size; | |
529 | length -= size; | |
530 | ||
531 | num_frags = skb_shinfo(skb)->nr_frags; | |
532 | for (i = 0; i < num_frags; i++) { | |
533 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
534 | ||
535 | if (length == 0) { | |
536 | /* don't need this page */ | |
1812063b | 537 | skb_fill_page_desc(toskb, i, frag->page, 0, PAGE_SIZE); |
839fcaba MT |
538 | --skb_shinfo(skb)->nr_frags; |
539 | } else { | |
540 | size = min(length, (unsigned) PAGE_SIZE); | |
541 | ||
542 | frag->size = size; | |
543 | skb->data_len += size; | |
544 | skb->truesize += size; | |
545 | skb->len += size; | |
546 | length -= size; | |
547 | } | |
548 | } | |
549 | } | |
550 | ||
551 | void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) | |
552 | { | |
553 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
68e995a2 | 554 | struct ipoib_cm_rx_buf *rx_ring; |
1b524963 | 555 | unsigned int wr_id = wc->wr_id & ~(IPOIB_OP_CM | IPOIB_OP_RECV); |
1812063b | 556 | struct sk_buff *skb, *newskb; |
839fcaba MT |
557 | struct ipoib_cm_rx *p; |
558 | unsigned long flags; | |
559 | u64 mapping[IPOIB_CM_RX_SG]; | |
1812063b | 560 | int frags; |
68e995a2 | 561 | int has_srq; |
f89271da | 562 | struct sk_buff *small_skb; |
839fcaba | 563 | |
a89875fc RD |
564 | ipoib_dbg_data(priv, "cm recv completion: id %d, status: %d\n", |
565 | wr_id, wc->status); | |
839fcaba MT |
566 | |
567 | if (unlikely(wr_id >= ipoib_recvq_size)) { | |
1b524963 | 568 | if (wr_id == (IPOIB_CM_RX_DRAIN_WRID & ~(IPOIB_OP_CM | IPOIB_OP_RECV))) { |
518b1646 MT |
569 | spin_lock_irqsave(&priv->lock, flags); |
570 | list_splice_init(&priv->cm.rx_drain_list, &priv->cm.rx_reap_list); | |
571 | ipoib_cm_start_rx_drain(priv); | |
572 | queue_work(ipoib_workqueue, &priv->cm.rx_reap_task); | |
573 | spin_unlock_irqrestore(&priv->lock, flags); | |
574 | } else | |
575 | ipoib_warn(priv, "cm recv completion event with wrid %d (> %d)\n", | |
576 | wr_id, ipoib_recvq_size); | |
839fcaba MT |
577 | return; |
578 | } | |
579 | ||
68e995a2 PS |
580 | p = wc->qp->qp_context; |
581 | ||
582 | has_srq = ipoib_cm_has_srq(dev); | |
583 | rx_ring = has_srq ? priv->cm.srq_ring : p->rx_ring; | |
584 | ||
585 | skb = rx_ring[wr_id].skb; | |
839fcaba MT |
586 | |
587 | if (unlikely(wc->status != IB_WC_SUCCESS)) { | |
588 | ipoib_dbg(priv, "cm recv error " | |
589 | "(status=%d, wrid=%d vend_err %x)\n", | |
590 | wc->status, wr_id, wc->vendor_err); | |
de903512 | 591 | ++dev->stats.rx_dropped; |
68e995a2 PS |
592 | if (has_srq) |
593 | goto repost; | |
594 | else { | |
595 | if (!--p->recv_count) { | |
596 | spin_lock_irqsave(&priv->lock, flags); | |
597 | list_move(&p->list, &priv->cm.rx_reap_list); | |
598 | spin_unlock_irqrestore(&priv->lock, flags); | |
599 | queue_work(ipoib_workqueue, &priv->cm.rx_reap_task); | |
600 | } | |
601 | return; | |
602 | } | |
839fcaba MT |
603 | } |
604 | ||
fd312561 | 605 | if (unlikely(!(wr_id & IPOIB_CM_RX_UPDATE_MASK))) { |
d6ef7d68 | 606 | if (p && time_after_eq(jiffies, p->jiffies + IPOIB_CM_RX_UPDATE_TIME)) { |
839fcaba MT |
607 | spin_lock_irqsave(&priv->lock, flags); |
608 | p->jiffies = jiffies; | |
518b1646 MT |
609 | /* Move this entry to list head, but do not re-add it |
610 | * if it has been moved out of list. */ | |
611 | if (p->state == IPOIB_CM_RX_LIVE) | |
839fcaba MT |
612 | list_move(&p->list, &priv->cm.passive_ids); |
613 | spin_unlock_irqrestore(&priv->lock, flags); | |
839fcaba MT |
614 | } |
615 | } | |
616 | ||
f89271da EC |
617 | if (wc->byte_len < IPOIB_CM_COPYBREAK) { |
618 | int dlen = wc->byte_len; | |
619 | ||
620 | small_skb = dev_alloc_skb(dlen + 12); | |
621 | if (small_skb) { | |
622 | skb_reserve(small_skb, 12); | |
623 | ib_dma_sync_single_for_cpu(priv->ca, rx_ring[wr_id].mapping[0], | |
624 | dlen, DMA_FROM_DEVICE); | |
625 | skb_copy_from_linear_data(skb, small_skb->data, dlen); | |
626 | ib_dma_sync_single_for_device(priv->ca, rx_ring[wr_id].mapping[0], | |
627 | dlen, DMA_FROM_DEVICE); | |
628 | skb_put(small_skb, dlen); | |
629 | skb = small_skb; | |
630 | goto copied; | |
631 | } | |
632 | } | |
633 | ||
1812063b MT |
634 | frags = PAGE_ALIGN(wc->byte_len - min(wc->byte_len, |
635 | (unsigned)IPOIB_CM_HEAD_SIZE)) / PAGE_SIZE; | |
636 | ||
68e995a2 | 637 | newskb = ipoib_cm_alloc_rx_skb(dev, rx_ring, wr_id, frags, mapping); |
1812063b | 638 | if (unlikely(!newskb)) { |
839fcaba MT |
639 | /* |
640 | * If we can't allocate a new RX buffer, dump | |
641 | * this packet and reuse the old buffer. | |
642 | */ | |
643 | ipoib_dbg(priv, "failed to allocate receive buffer %d\n", wr_id); | |
de903512 | 644 | ++dev->stats.rx_dropped; |
839fcaba MT |
645 | goto repost; |
646 | } | |
647 | ||
68e995a2 PS |
648 | ipoib_cm_dma_unmap_rx(priv, frags, rx_ring[wr_id].mapping); |
649 | memcpy(rx_ring[wr_id].mapping, mapping, (frags + 1) * sizeof *mapping); | |
839fcaba MT |
650 | |
651 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", | |
652 | wc->byte_len, wc->slid); | |
653 | ||
1812063b | 654 | skb_put_frags(skb, IPOIB_CM_HEAD_SIZE, wc->byte_len, newskb); |
839fcaba | 655 | |
f89271da | 656 | copied: |
839fcaba | 657 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; |
459a98ed | 658 | skb_reset_mac_header(skb); |
839fcaba MT |
659 | skb_pull(skb, IPOIB_ENCAP_LEN); |
660 | ||
661 | dev->last_rx = jiffies; | |
de903512 RD |
662 | ++dev->stats.rx_packets; |
663 | dev->stats.rx_bytes += skb->len; | |
839fcaba MT |
664 | |
665 | skb->dev = dev; | |
666 | /* XXX get correct PACKET_ type here */ | |
667 | skb->pkt_type = PACKET_HOST; | |
8d1cc86a | 668 | netif_receive_skb(skb); |
839fcaba MT |
669 | |
670 | repost: | |
68e995a2 PS |
671 | if (has_srq) { |
672 | if (unlikely(ipoib_cm_post_receive_srq(dev, wr_id))) | |
673 | ipoib_warn(priv, "ipoib_cm_post_receive_srq failed " | |
674 | "for buf %d\n", wr_id); | |
675 | } else { | |
a7d834c4 RD |
676 | if (unlikely(ipoib_cm_post_receive_nonsrq(dev, p, |
677 | &priv->cm.rx_wr, | |
678 | priv->cm.rx_sge, | |
679 | wr_id))) { | |
68e995a2 PS |
680 | --p->recv_count; |
681 | ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq failed " | |
682 | "for buf %d\n", wr_id); | |
683 | } | |
684 | } | |
839fcaba MT |
685 | } |
686 | ||
687 | static inline int post_send(struct ipoib_dev_priv *priv, | |
688 | struct ipoib_cm_tx *tx, | |
689 | unsigned int wr_id, | |
690 | u64 addr, int len) | |
691 | { | |
692 | struct ib_send_wr *bad_wr; | |
693 | ||
7143740d EC |
694 | priv->tx_sge[0].addr = addr; |
695 | priv->tx_sge[0].length = len; | |
839fcaba | 696 | |
4200406b | 697 | priv->tx_wr.num_sge = 1; |
2337f809 | 698 | priv->tx_wr.wr_id = wr_id | IPOIB_OP_CM; |
839fcaba MT |
699 | |
700 | return ib_post_send(tx->qp, &priv->tx_wr, &bad_wr); | |
701 | } | |
702 | ||
703 | void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx) | |
704 | { | |
705 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
e112373f | 706 | struct ipoib_cm_tx_buf *tx_req; |
839fcaba MT |
707 | u64 addr; |
708 | ||
709 | if (unlikely(skb->len > tx->mtu)) { | |
710 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", | |
711 | skb->len, tx->mtu); | |
de903512 RD |
712 | ++dev->stats.tx_dropped; |
713 | ++dev->stats.tx_errors; | |
77d8e1ef | 714 | ipoib_cm_skb_too_long(dev, skb, tx->mtu - IPOIB_ENCAP_LEN); |
839fcaba MT |
715 | return; |
716 | } | |
717 | ||
718 | ipoib_dbg_data(priv, "sending packet: head 0x%x length %d connection 0x%x\n", | |
719 | tx->tx_head, skb->len, tx->qp->qp_num); | |
720 | ||
721 | /* | |
722 | * We put the skb into the tx_ring _before_ we call post_send() | |
723 | * because it's entirely possible that the completion handler will | |
724 | * run before we execute anything after the post_send(). That | |
725 | * means we have to make sure everything is properly recorded and | |
726 | * our state is consistent before we call post_send(). | |
727 | */ | |
728 | tx_req = &tx->tx_ring[tx->tx_head & (ipoib_sendq_size - 1)]; | |
729 | tx_req->skb = skb; | |
730 | addr = ib_dma_map_single(priv->ca, skb->data, skb->len, DMA_TO_DEVICE); | |
731 | if (unlikely(ib_dma_mapping_error(priv->ca, addr))) { | |
de903512 | 732 | ++dev->stats.tx_errors; |
839fcaba MT |
733 | dev_kfree_skb_any(skb); |
734 | return; | |
735 | } | |
736 | ||
e112373f | 737 | tx_req->mapping = addr; |
839fcaba MT |
738 | |
739 | if (unlikely(post_send(priv, tx, tx->tx_head & (ipoib_sendq_size - 1), | |
2337f809 | 740 | addr, skb->len))) { |
839fcaba | 741 | ipoib_warn(priv, "post_send failed\n"); |
de903512 | 742 | ++dev->stats.tx_errors; |
839fcaba MT |
743 | ib_dma_unmap_single(priv->ca, addr, skb->len, DMA_TO_DEVICE); |
744 | dev_kfree_skb_any(skb); | |
745 | } else { | |
746 | dev->trans_start = jiffies; | |
747 | ++tx->tx_head; | |
748 | ||
1b524963 | 749 | if (++priv->tx_outstanding == ipoib_sendq_size) { |
839fcaba MT |
750 | ipoib_dbg(priv, "TX ring 0x%x full, stopping kernel net queue\n", |
751 | tx->qp->qp_num); | |
752 | netif_stop_queue(dev); | |
839fcaba MT |
753 | } |
754 | } | |
755 | } | |
756 | ||
1b524963 | 757 | void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc) |
839fcaba MT |
758 | { |
759 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1b524963 MT |
760 | struct ipoib_cm_tx *tx = wc->qp->qp_context; |
761 | unsigned int wr_id = wc->wr_id & ~IPOIB_OP_CM; | |
e112373f | 762 | struct ipoib_cm_tx_buf *tx_req; |
839fcaba MT |
763 | unsigned long flags; |
764 | ||
a89875fc RD |
765 | ipoib_dbg_data(priv, "cm send completion: id %d, status: %d\n", |
766 | wr_id, wc->status); | |
839fcaba MT |
767 | |
768 | if (unlikely(wr_id >= ipoib_sendq_size)) { | |
769 | ipoib_warn(priv, "cm send completion event with wrid %d (> %d)\n", | |
770 | wr_id, ipoib_sendq_size); | |
771 | return; | |
772 | } | |
773 | ||
774 | tx_req = &tx->tx_ring[wr_id]; | |
775 | ||
e112373f | 776 | ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len, DMA_TO_DEVICE); |
839fcaba MT |
777 | |
778 | /* FIXME: is this right? Shouldn't we only increment on success? */ | |
de903512 RD |
779 | ++dev->stats.tx_packets; |
780 | dev->stats.tx_bytes += tx_req->skb->len; | |
839fcaba MT |
781 | |
782 | dev_kfree_skb_any(tx_req->skb); | |
783 | ||
784 | spin_lock_irqsave(&priv->tx_lock, flags); | |
785 | ++tx->tx_tail; | |
1b524963 MT |
786 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
787 | netif_queue_stopped(dev) && | |
788 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
839fcaba | 789 | netif_wake_queue(dev); |
839fcaba MT |
790 | |
791 | if (wc->status != IB_WC_SUCCESS && | |
792 | wc->status != IB_WC_WR_FLUSH_ERR) { | |
793 | struct ipoib_neigh *neigh; | |
794 | ||
795 | ipoib_dbg(priv, "failed cm send event " | |
796 | "(status=%d, wrid=%d vend_err %x)\n", | |
797 | wc->status, wr_id, wc->vendor_err); | |
798 | ||
799 | spin_lock(&priv->lock); | |
800 | neigh = tx->neigh; | |
801 | ||
802 | if (neigh) { | |
803 | neigh->cm = NULL; | |
804 | list_del(&neigh->list); | |
805 | if (neigh->ah) | |
806 | ipoib_put_ah(neigh->ah); | |
807 | ipoib_neigh_free(dev, neigh); | |
808 | ||
809 | tx->neigh = NULL; | |
810 | } | |
811 | ||
839fcaba MT |
812 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { |
813 | list_move(&tx->list, &priv->cm.reap_list); | |
814 | queue_work(ipoib_workqueue, &priv->cm.reap_task); | |
815 | } | |
816 | ||
817 | clear_bit(IPOIB_FLAG_OPER_UP, &tx->flags); | |
818 | ||
819 | spin_unlock(&priv->lock); | |
820 | } | |
821 | ||
822 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
823 | } | |
824 | ||
839fcaba MT |
825 | int ipoib_cm_dev_open(struct net_device *dev) |
826 | { | |
827 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
828 | int ret; | |
829 | ||
830 | if (!IPOIB_CM_SUPPORTED(dev->dev_addr)) | |
831 | return 0; | |
832 | ||
833 | priv->cm.id = ib_create_cm_id(priv->ca, ipoib_cm_rx_handler, dev); | |
834 | if (IS_ERR(priv->cm.id)) { | |
835 | printk(KERN_WARNING "%s: failed to create CM ID\n", priv->ca->name); | |
347fcfbe | 836 | ret = PTR_ERR(priv->cm.id); |
518b1646 | 837 | goto err_cm; |
839fcaba MT |
838 | } |
839 | ||
840 | ret = ib_cm_listen(priv->cm.id, cpu_to_be64(IPOIB_CM_IETF_ID | priv->qp->qp_num), | |
841 | 0, NULL); | |
842 | if (ret) { | |
843 | printk(KERN_WARNING "%s: failed to listen on ID 0x%llx\n", priv->ca->name, | |
844 | IPOIB_CM_IETF_ID | priv->qp->qp_num); | |
518b1646 | 845 | goto err_listen; |
839fcaba | 846 | } |
518b1646 | 847 | |
839fcaba | 848 | return 0; |
518b1646 MT |
849 | |
850 | err_listen: | |
851 | ib_destroy_cm_id(priv->cm.id); | |
852 | err_cm: | |
853 | priv->cm.id = NULL; | |
518b1646 | 854 | return ret; |
839fcaba MT |
855 | } |
856 | ||
efcd9971 RD |
857 | static void ipoib_cm_free_rx_reap_list(struct net_device *dev) |
858 | { | |
859 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
860 | struct ipoib_cm_rx *rx, *n; | |
861 | LIST_HEAD(list); | |
862 | ||
863 | spin_lock_irq(&priv->lock); | |
864 | list_splice_init(&priv->cm.rx_reap_list, &list); | |
865 | spin_unlock_irq(&priv->lock); | |
866 | ||
867 | list_for_each_entry_safe(rx, n, &list, list) { | |
868 | ib_destroy_cm_id(rx->id); | |
869 | ib_destroy_qp(rx->qp); | |
68e995a2 PS |
870 | if (!ipoib_cm_has_srq(dev)) { |
871 | ipoib_cm_free_rx_ring(priv->dev, rx->rx_ring); | |
872 | spin_lock_irq(&priv->lock); | |
873 | --priv->cm.nonsrq_conn_qp; | |
874 | spin_unlock_irq(&priv->lock); | |
875 | } | |
efcd9971 RD |
876 | kfree(rx); |
877 | } | |
878 | } | |
879 | ||
839fcaba MT |
880 | void ipoib_cm_dev_stop(struct net_device *dev) |
881 | { | |
882 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
efcd9971 | 883 | struct ipoib_cm_rx *p; |
518b1646 | 884 | unsigned long begin; |
518b1646 | 885 | int ret; |
839fcaba | 886 | |
347fcfbe | 887 | if (!IPOIB_CM_SUPPORTED(dev->dev_addr) || !priv->cm.id) |
839fcaba MT |
888 | return; |
889 | ||
890 | ib_destroy_cm_id(priv->cm.id); | |
347fcfbe | 891 | priv->cm.id = NULL; |
518b1646 | 892 | |
37aebbde | 893 | spin_lock_irq(&priv->lock); |
839fcaba MT |
894 | while (!list_empty(&priv->cm.passive_ids)) { |
895 | p = list_entry(priv->cm.passive_ids.next, typeof(*p), list); | |
518b1646 MT |
896 | list_move(&p->list, &priv->cm.rx_error_list); |
897 | p->state = IPOIB_CM_RX_ERROR; | |
37aebbde | 898 | spin_unlock_irq(&priv->lock); |
518b1646 MT |
899 | ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); |
900 | if (ret) | |
901 | ipoib_warn(priv, "unable to move qp to error state: %d\n", ret); | |
902 | spin_lock_irq(&priv->lock); | |
903 | } | |
904 | ||
905 | /* Wait for all RX to be drained */ | |
906 | begin = jiffies; | |
907 | ||
908 | while (!list_empty(&priv->cm.rx_error_list) || | |
909 | !list_empty(&priv->cm.rx_flush_list) || | |
910 | !list_empty(&priv->cm.rx_drain_list)) { | |
8fd357a6 | 911 | if (time_after(jiffies, begin + 5 * HZ)) { |
518b1646 MT |
912 | ipoib_warn(priv, "RX drain timing out\n"); |
913 | ||
914 | /* | |
915 | * assume the HW is wedged and just free up everything. | |
916 | */ | |
ec229e5e PS |
917 | list_splice_init(&priv->cm.rx_flush_list, |
918 | &priv->cm.rx_reap_list); | |
919 | list_splice_init(&priv->cm.rx_error_list, | |
920 | &priv->cm.rx_reap_list); | |
921 | list_splice_init(&priv->cm.rx_drain_list, | |
922 | &priv->cm.rx_reap_list); | |
518b1646 MT |
923 | break; |
924 | } | |
925 | spin_unlock_irq(&priv->lock); | |
926 | msleep(1); | |
2dfbfc37 | 927 | ipoib_drain_cq(dev); |
518b1646 MT |
928 | spin_lock_irq(&priv->lock); |
929 | } | |
930 | ||
518b1646 MT |
931 | spin_unlock_irq(&priv->lock); |
932 | ||
efcd9971 | 933 | ipoib_cm_free_rx_reap_list(dev); |
839fcaba MT |
934 | |
935 | cancel_delayed_work(&priv->cm.stale_task); | |
936 | } | |
937 | ||
938 | static int ipoib_cm_rep_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
939 | { | |
940 | struct ipoib_cm_tx *p = cm_id->context; | |
941 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); | |
942 | struct ipoib_cm_data *data = event->private_data; | |
943 | struct sk_buff_head skqueue; | |
944 | struct ib_qp_attr qp_attr; | |
945 | int qp_attr_mask, ret; | |
946 | struct sk_buff *skb; | |
839fcaba MT |
947 | |
948 | p->mtu = be32_to_cpu(data->mtu); | |
949 | ||
82c3aca6 MT |
950 | if (p->mtu <= IPOIB_ENCAP_LEN) { |
951 | ipoib_warn(priv, "Rejecting connection: mtu %d <= %d\n", | |
952 | p->mtu, IPOIB_ENCAP_LEN); | |
839fcaba MT |
953 | return -EINVAL; |
954 | } | |
955 | ||
956 | qp_attr.qp_state = IB_QPS_RTR; | |
957 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
958 | if (ret) { | |
959 | ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); | |
960 | return ret; | |
961 | } | |
962 | ||
963 | qp_attr.rq_psn = 0 /* FIXME */; | |
964 | ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); | |
965 | if (ret) { | |
966 | ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); | |
967 | return ret; | |
968 | } | |
969 | ||
970 | qp_attr.qp_state = IB_QPS_RTS; | |
971 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
972 | if (ret) { | |
973 | ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); | |
974 | return ret; | |
975 | } | |
976 | ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); | |
977 | if (ret) { | |
978 | ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); | |
979 | return ret; | |
980 | } | |
981 | ||
982 | skb_queue_head_init(&skqueue); | |
983 | ||
37aebbde | 984 | spin_lock_irq(&priv->lock); |
839fcaba MT |
985 | set_bit(IPOIB_FLAG_OPER_UP, &p->flags); |
986 | if (p->neigh) | |
987 | while ((skb = __skb_dequeue(&p->neigh->queue))) | |
988 | __skb_queue_tail(&skqueue, skb); | |
37aebbde | 989 | spin_unlock_irq(&priv->lock); |
839fcaba MT |
990 | |
991 | while ((skb = __skb_dequeue(&skqueue))) { | |
992 | skb->dev = p->dev; | |
993 | if (dev_queue_xmit(skb)) | |
994 | ipoib_warn(priv, "dev_queue_xmit failed " | |
995 | "to requeue packet\n"); | |
996 | } | |
997 | ||
998 | ret = ib_send_cm_rtu(cm_id, NULL, 0); | |
999 | if (ret) { | |
1000 | ipoib_warn(priv, "failed to send RTU: %d\n", ret); | |
1001 | return ret; | |
1002 | } | |
1003 | return 0; | |
1004 | } | |
1005 | ||
1b524963 | 1006 | static struct ib_qp *ipoib_cm_create_tx_qp(struct net_device *dev, struct ipoib_cm_tx *tx) |
839fcaba MT |
1007 | { |
1008 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
ede6bc04 | 1009 | struct ib_qp_init_attr attr = { |
f56bcd80 EC |
1010 | .send_cq = priv->recv_cq, |
1011 | .recv_cq = priv->recv_cq, | |
ede6bc04 DB |
1012 | .srq = priv->cm.srq, |
1013 | .cap.max_send_wr = ipoib_sendq_size, | |
1014 | .cap.max_send_sge = 1, | |
1015 | .sq_sig_type = IB_SIGNAL_ALL_WR, | |
1016 | .qp_type = IB_QPT_RC, | |
1b524963 | 1017 | .qp_context = tx |
2337f809 | 1018 | }; |
ede6bc04 | 1019 | |
839fcaba MT |
1020 | return ib_create_qp(priv->pd, &attr); |
1021 | } | |
1022 | ||
1023 | static int ipoib_cm_send_req(struct net_device *dev, | |
1024 | struct ib_cm_id *id, struct ib_qp *qp, | |
1025 | u32 qpn, | |
1026 | struct ib_sa_path_rec *pathrec) | |
1027 | { | |
1028 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1029 | struct ipoib_cm_data data = {}; | |
1030 | struct ib_cm_req_param req = {}; | |
1031 | ||
1032 | data.qpn = cpu_to_be32(priv->qp->qp_num); | |
1033 | data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); | |
1034 | ||
2337f809 RD |
1035 | req.primary_path = pathrec; |
1036 | req.alternate_path = NULL; | |
1037 | req.service_id = cpu_to_be64(IPOIB_CM_IETF_ID | qpn); | |
1038 | req.qp_num = qp->qp_num; | |
1039 | req.qp_type = qp->qp_type; | |
1040 | req.private_data = &data; | |
1041 | req.private_data_len = sizeof data; | |
1042 | req.flow_control = 0; | |
839fcaba | 1043 | |
2337f809 | 1044 | req.starting_psn = 0; /* FIXME */ |
839fcaba MT |
1045 | |
1046 | /* | |
1047 | * Pick some arbitrary defaults here; we could make these | |
1048 | * module parameters if anyone cared about setting them. | |
1049 | */ | |
2337f809 RD |
1050 | req.responder_resources = 4; |
1051 | req.remote_cm_response_timeout = 20; | |
1052 | req.local_cm_response_timeout = 20; | |
1053 | req.retry_count = 0; /* RFC draft warns against retries */ | |
1054 | req.rnr_retry_count = 0; /* RFC draft warns against retries */ | |
1055 | req.max_cm_retries = 15; | |
68e995a2 | 1056 | req.srq = ipoib_cm_has_srq(dev); |
839fcaba MT |
1057 | return ib_send_cm_req(id, &req); |
1058 | } | |
1059 | ||
1060 | static int ipoib_cm_modify_tx_init(struct net_device *dev, | |
1061 | struct ib_cm_id *cm_id, struct ib_qp *qp) | |
1062 | { | |
1063 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1064 | struct ib_qp_attr qp_attr; | |
1065 | int qp_attr_mask, ret; | |
9fdd5e5b | 1066 | ret = ib_find_pkey(priv->ca, priv->port, priv->pkey, &qp_attr.pkey_index); |
839fcaba | 1067 | if (ret) { |
9fdd5e5b | 1068 | ipoib_warn(priv, "pkey 0x%x not found: %d\n", priv->pkey, ret); |
839fcaba MT |
1069 | return ret; |
1070 | } | |
1071 | ||
1072 | qp_attr.qp_state = IB_QPS_INIT; | |
1073 | qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE; | |
1074 | qp_attr.port_num = priv->port; | |
1075 | qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
1076 | ||
1077 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); | |
1078 | if (ret) { | |
1079 | ipoib_warn(priv, "failed to modify tx QP to INIT: %d\n", ret); | |
1080 | return ret; | |
1081 | } | |
1082 | return 0; | |
1083 | } | |
1084 | ||
1085 | static int ipoib_cm_tx_init(struct ipoib_cm_tx *p, u32 qpn, | |
1086 | struct ib_sa_path_rec *pathrec) | |
1087 | { | |
1088 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); | |
1089 | int ret; | |
1090 | ||
10313cbb | 1091 | p->tx_ring = vmalloc(ipoib_sendq_size * sizeof *p->tx_ring); |
839fcaba MT |
1092 | if (!p->tx_ring) { |
1093 | ipoib_warn(priv, "failed to allocate tx ring\n"); | |
1094 | ret = -ENOMEM; | |
1095 | goto err_tx; | |
1096 | } | |
10313cbb | 1097 | memset(p->tx_ring, 0, ipoib_sendq_size * sizeof *p->tx_ring); |
839fcaba | 1098 | |
1b524963 | 1099 | p->qp = ipoib_cm_create_tx_qp(p->dev, p); |
839fcaba MT |
1100 | if (IS_ERR(p->qp)) { |
1101 | ret = PTR_ERR(p->qp); | |
1102 | ipoib_warn(priv, "failed to allocate tx qp: %d\n", ret); | |
1103 | goto err_qp; | |
1104 | } | |
1105 | ||
1106 | p->id = ib_create_cm_id(priv->ca, ipoib_cm_tx_handler, p); | |
1107 | if (IS_ERR(p->id)) { | |
1108 | ret = PTR_ERR(p->id); | |
1109 | ipoib_warn(priv, "failed to create tx cm id: %d\n", ret); | |
1110 | goto err_id; | |
1111 | } | |
1112 | ||
1113 | ret = ipoib_cm_modify_tx_init(p->dev, p->id, p->qp); | |
1114 | if (ret) { | |
1115 | ipoib_warn(priv, "failed to modify tx qp to rtr: %d\n", ret); | |
1116 | goto err_modify; | |
1117 | } | |
1118 | ||
1119 | ret = ipoib_cm_send_req(p->dev, p->id, p->qp, qpn, pathrec); | |
1120 | if (ret) { | |
1121 | ipoib_warn(priv, "failed to send cm req: %d\n", ret); | |
1122 | goto err_send_cm; | |
1123 | } | |
1124 | ||
1125 | ipoib_dbg(priv, "Request connection 0x%x for gid " IPOIB_GID_FMT " qpn 0x%x\n", | |
1126 | p->qp->qp_num, IPOIB_GID_ARG(pathrec->dgid), qpn); | |
1127 | ||
1128 | return 0; | |
1129 | ||
1130 | err_send_cm: | |
1131 | err_modify: | |
1132 | ib_destroy_cm_id(p->id); | |
1133 | err_id: | |
1134 | p->id = NULL; | |
1135 | ib_destroy_qp(p->qp); | |
839fcaba MT |
1136 | err_qp: |
1137 | p->qp = NULL; | |
10313cbb | 1138 | vfree(p->tx_ring); |
839fcaba MT |
1139 | err_tx: |
1140 | return ret; | |
1141 | } | |
1142 | ||
1143 | static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p) | |
1144 | { | |
1145 | struct ipoib_dev_priv *priv = netdev_priv(p->dev); | |
e112373f | 1146 | struct ipoib_cm_tx_buf *tx_req; |
1b524963 MT |
1147 | unsigned long flags; |
1148 | unsigned long begin; | |
839fcaba MT |
1149 | |
1150 | ipoib_dbg(priv, "Destroy active connection 0x%x head 0x%x tail 0x%x\n", | |
1151 | p->qp ? p->qp->qp_num : 0, p->tx_head, p->tx_tail); | |
1152 | ||
1153 | if (p->id) | |
1154 | ib_destroy_cm_id(p->id); | |
1155 | ||
839fcaba | 1156 | if (p->tx_ring) { |
1b524963 MT |
1157 | /* Wait for all sends to complete */ |
1158 | begin = jiffies; | |
839fcaba | 1159 | while ((int) p->tx_tail - (int) p->tx_head < 0) { |
1b524963 MT |
1160 | if (time_after(jiffies, begin + 5 * HZ)) { |
1161 | ipoib_warn(priv, "timing out; %d sends not completed\n", | |
1162 | p->tx_head - p->tx_tail); | |
1163 | goto timeout; | |
1164 | } | |
1165 | ||
1166 | msleep(1); | |
839fcaba | 1167 | } |
1b524963 MT |
1168 | } |
1169 | ||
1170 | timeout: | |
839fcaba | 1171 | |
1b524963 MT |
1172 | while ((int) p->tx_tail - (int) p->tx_head < 0) { |
1173 | tx_req = &p->tx_ring[p->tx_tail & (ipoib_sendq_size - 1)]; | |
e112373f | 1174 | ib_dma_unmap_single(priv->ca, tx_req->mapping, tx_req->skb->len, |
1b524963 MT |
1175 | DMA_TO_DEVICE); |
1176 | dev_kfree_skb_any(tx_req->skb); | |
1177 | ++p->tx_tail; | |
1178 | spin_lock_irqsave(&priv->tx_lock, flags); | |
1179 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && | |
1180 | netif_queue_stopped(p->dev) && | |
1181 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
1182 | netif_wake_queue(p->dev); | |
1183 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
839fcaba MT |
1184 | } |
1185 | ||
1b524963 MT |
1186 | if (p->qp) |
1187 | ib_destroy_qp(p->qp); | |
1188 | ||
10313cbb | 1189 | vfree(p->tx_ring); |
839fcaba MT |
1190 | kfree(p); |
1191 | } | |
1192 | ||
1193 | static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, | |
1194 | struct ib_cm_event *event) | |
1195 | { | |
1196 | struct ipoib_cm_tx *tx = cm_id->context; | |
1197 | struct ipoib_dev_priv *priv = netdev_priv(tx->dev); | |
1198 | struct net_device *dev = priv->dev; | |
1199 | struct ipoib_neigh *neigh; | |
839fcaba MT |
1200 | int ret; |
1201 | ||
1202 | switch (event->event) { | |
1203 | case IB_CM_DREQ_RECEIVED: | |
1204 | ipoib_dbg(priv, "DREQ received.\n"); | |
1205 | ib_send_cm_drep(cm_id, NULL, 0); | |
1206 | break; | |
1207 | case IB_CM_REP_RECEIVED: | |
1208 | ipoib_dbg(priv, "REP received.\n"); | |
1209 | ret = ipoib_cm_rep_handler(cm_id, event); | |
1210 | if (ret) | |
1211 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, | |
1212 | NULL, 0, NULL, 0); | |
1213 | break; | |
1214 | case IB_CM_REQ_ERROR: | |
1215 | case IB_CM_REJ_RECEIVED: | |
1216 | case IB_CM_TIMEWAIT_EXIT: | |
1217 | ipoib_dbg(priv, "CM error %d.\n", event->event); | |
37aebbde | 1218 | spin_lock_irq(&priv->tx_lock); |
839fcaba MT |
1219 | spin_lock(&priv->lock); |
1220 | neigh = tx->neigh; | |
1221 | ||
1222 | if (neigh) { | |
1223 | neigh->cm = NULL; | |
1224 | list_del(&neigh->list); | |
1225 | if (neigh->ah) | |
1226 | ipoib_put_ah(neigh->ah); | |
1227 | ipoib_neigh_free(dev, neigh); | |
1228 | ||
1229 | tx->neigh = NULL; | |
1230 | } | |
1231 | ||
1232 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { | |
1233 | list_move(&tx->list, &priv->cm.reap_list); | |
1234 | queue_work(ipoib_workqueue, &priv->cm.reap_task); | |
1235 | } | |
1236 | ||
1237 | spin_unlock(&priv->lock); | |
37aebbde | 1238 | spin_unlock_irq(&priv->tx_lock); |
839fcaba MT |
1239 | break; |
1240 | default: | |
1241 | break; | |
1242 | } | |
1243 | ||
1244 | return 0; | |
1245 | } | |
1246 | ||
1247 | struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path, | |
1248 | struct ipoib_neigh *neigh) | |
1249 | { | |
1250 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1251 | struct ipoib_cm_tx *tx; | |
1252 | ||
1253 | tx = kzalloc(sizeof *tx, GFP_ATOMIC); | |
1254 | if (!tx) | |
1255 | return NULL; | |
1256 | ||
1257 | neigh->cm = tx; | |
1258 | tx->neigh = neigh; | |
1259 | tx->path = path; | |
1260 | tx->dev = dev; | |
1261 | list_add(&tx->list, &priv->cm.start_list); | |
1262 | set_bit(IPOIB_FLAG_INITIALIZED, &tx->flags); | |
1263 | queue_work(ipoib_workqueue, &priv->cm.start_task); | |
1264 | return tx; | |
1265 | } | |
1266 | ||
1267 | void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx) | |
1268 | { | |
1269 | struct ipoib_dev_priv *priv = netdev_priv(tx->dev); | |
1270 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { | |
1271 | list_move(&tx->list, &priv->cm.reap_list); | |
1272 | queue_work(ipoib_workqueue, &priv->cm.reap_task); | |
1273 | ipoib_dbg(priv, "Reap connection for gid " IPOIB_GID_FMT "\n", | |
1274 | IPOIB_GID_ARG(tx->neigh->dgid)); | |
1275 | tx->neigh = NULL; | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | static void ipoib_cm_tx_start(struct work_struct *work) | |
1280 | { | |
1281 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
1282 | cm.start_task); | |
1283 | struct net_device *dev = priv->dev; | |
1284 | struct ipoib_neigh *neigh; | |
1285 | struct ipoib_cm_tx *p; | |
1286 | unsigned long flags; | |
1287 | int ret; | |
1288 | ||
1289 | struct ib_sa_path_rec pathrec; | |
1290 | u32 qpn; | |
1291 | ||
1292 | spin_lock_irqsave(&priv->tx_lock, flags); | |
1293 | spin_lock(&priv->lock); | |
1294 | while (!list_empty(&priv->cm.start_list)) { | |
1295 | p = list_entry(priv->cm.start_list.next, typeof(*p), list); | |
1296 | list_del_init(&p->list); | |
1297 | neigh = p->neigh; | |
1298 | qpn = IPOIB_QPN(neigh->neighbour->ha); | |
1299 | memcpy(&pathrec, &p->path->pathrec, sizeof pathrec); | |
1300 | spin_unlock(&priv->lock); | |
1301 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
1302 | ret = ipoib_cm_tx_init(p, qpn, &pathrec); | |
1303 | spin_lock_irqsave(&priv->tx_lock, flags); | |
1304 | spin_lock(&priv->lock); | |
1305 | if (ret) { | |
1306 | neigh = p->neigh; | |
1307 | if (neigh) { | |
1308 | neigh->cm = NULL; | |
1309 | list_del(&neigh->list); | |
1310 | if (neigh->ah) | |
1311 | ipoib_put_ah(neigh->ah); | |
1312 | ipoib_neigh_free(dev, neigh); | |
1313 | } | |
1314 | list_del(&p->list); | |
1315 | kfree(p); | |
1316 | } | |
1317 | } | |
1318 | spin_unlock(&priv->lock); | |
1319 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
1320 | } | |
1321 | ||
1322 | static void ipoib_cm_tx_reap(struct work_struct *work) | |
1323 | { | |
1324 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
1325 | cm.reap_task); | |
1326 | struct ipoib_cm_tx *p; | |
839fcaba | 1327 | |
37aebbde | 1328 | spin_lock_irq(&priv->tx_lock); |
839fcaba MT |
1329 | spin_lock(&priv->lock); |
1330 | while (!list_empty(&priv->cm.reap_list)) { | |
1331 | p = list_entry(priv->cm.reap_list.next, typeof(*p), list); | |
1332 | list_del(&p->list); | |
1333 | spin_unlock(&priv->lock); | |
37aebbde | 1334 | spin_unlock_irq(&priv->tx_lock); |
839fcaba | 1335 | ipoib_cm_tx_destroy(p); |
37aebbde | 1336 | spin_lock_irq(&priv->tx_lock); |
839fcaba MT |
1337 | spin_lock(&priv->lock); |
1338 | } | |
1339 | spin_unlock(&priv->lock); | |
37aebbde | 1340 | spin_unlock_irq(&priv->tx_lock); |
839fcaba MT |
1341 | } |
1342 | ||
1343 | static void ipoib_cm_skb_reap(struct work_struct *work) | |
1344 | { | |
1345 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
1346 | cm.skb_task); | |
839fcaba | 1347 | struct sk_buff *skb; |
839fcaba MT |
1348 | |
1349 | unsigned mtu = priv->mcast_mtu; | |
1350 | ||
37aebbde | 1351 | spin_lock_irq(&priv->tx_lock); |
839fcaba MT |
1352 | spin_lock(&priv->lock); |
1353 | while ((skb = skb_dequeue(&priv->cm.skb_queue))) { | |
1354 | spin_unlock(&priv->lock); | |
37aebbde | 1355 | spin_unlock_irq(&priv->tx_lock); |
839fcaba MT |
1356 | if (skb->protocol == htons(ETH_P_IP)) |
1357 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); | |
1358 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1359 | else if (skb->protocol == htons(ETH_P_IPV6)) | |
20089ca5 | 1360 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, priv->dev); |
839fcaba MT |
1361 | #endif |
1362 | dev_kfree_skb_any(skb); | |
37aebbde | 1363 | spin_lock_irq(&priv->tx_lock); |
839fcaba MT |
1364 | spin_lock(&priv->lock); |
1365 | } | |
1366 | spin_unlock(&priv->lock); | |
37aebbde | 1367 | spin_unlock_irq(&priv->tx_lock); |
839fcaba MT |
1368 | } |
1369 | ||
2337f809 | 1370 | void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb, |
839fcaba MT |
1371 | unsigned int mtu) |
1372 | { | |
1373 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1374 | int e = skb_queue_empty(&priv->cm.skb_queue); | |
1375 | ||
1376 | if (skb->dst) | |
1377 | skb->dst->ops->update_pmtu(skb->dst, mtu); | |
1378 | ||
1379 | skb_queue_tail(&priv->cm.skb_queue, skb); | |
1380 | if (e) | |
1381 | queue_work(ipoib_workqueue, &priv->cm.skb_task); | |
1382 | } | |
1383 | ||
518b1646 MT |
1384 | static void ipoib_cm_rx_reap(struct work_struct *work) |
1385 | { | |
efcd9971 RD |
1386 | ipoib_cm_free_rx_reap_list(container_of(work, struct ipoib_dev_priv, |
1387 | cm.rx_reap_task)->dev); | |
518b1646 MT |
1388 | } |
1389 | ||
839fcaba MT |
1390 | static void ipoib_cm_stale_task(struct work_struct *work) |
1391 | { | |
1392 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
1393 | cm.stale_task.work); | |
1394 | struct ipoib_cm_rx *p; | |
518b1646 | 1395 | int ret; |
839fcaba | 1396 | |
37aebbde | 1397 | spin_lock_irq(&priv->lock); |
839fcaba | 1398 | while (!list_empty(&priv->cm.passive_ids)) { |
518b1646 | 1399 | /* List is sorted by LRU, start from tail, |
839fcaba MT |
1400 | * stop when we see a recently used entry */ |
1401 | p = list_entry(priv->cm.passive_ids.prev, typeof(*p), list); | |
60a596da | 1402 | if (time_before_eq(jiffies, p->jiffies + IPOIB_CM_RX_TIMEOUT)) |
839fcaba | 1403 | break; |
518b1646 MT |
1404 | list_move(&p->list, &priv->cm.rx_error_list); |
1405 | p->state = IPOIB_CM_RX_ERROR; | |
37aebbde | 1406 | spin_unlock_irq(&priv->lock); |
518b1646 MT |
1407 | ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); |
1408 | if (ret) | |
1409 | ipoib_warn(priv, "unable to move qp to error state: %d\n", ret); | |
37aebbde | 1410 | spin_lock_irq(&priv->lock); |
839fcaba | 1411 | } |
7c5b9ef8 MT |
1412 | |
1413 | if (!list_empty(&priv->cm.passive_ids)) | |
1414 | queue_delayed_work(ipoib_workqueue, | |
1415 | &priv->cm.stale_task, IPOIB_CM_RX_DELAY); | |
37aebbde | 1416 | spin_unlock_irq(&priv->lock); |
839fcaba MT |
1417 | } |
1418 | ||
1419 | ||
2337f809 | 1420 | static ssize_t show_mode(struct device *d, struct device_attribute *attr, |
839fcaba MT |
1421 | char *buf) |
1422 | { | |
1423 | struct ipoib_dev_priv *priv = netdev_priv(to_net_dev(d)); | |
1424 | ||
1425 | if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) | |
1426 | return sprintf(buf, "connected\n"); | |
1427 | else | |
1428 | return sprintf(buf, "datagram\n"); | |
1429 | } | |
1430 | ||
1431 | static ssize_t set_mode(struct device *d, struct device_attribute *attr, | |
1432 | const char *buf, size_t count) | |
1433 | { | |
1434 | struct net_device *dev = to_net_dev(d); | |
1435 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1436 | ||
1437 | /* flush paths if we switch modes so that connections are restarted */ | |
1438 | if (IPOIB_CM_SUPPORTED(dev->dev_addr) && !strcmp(buf, "connected\n")) { | |
1439 | set_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
1440 | ipoib_warn(priv, "enabling connected mode " | |
1441 | "will cause multicast packet drops\n"); | |
6046136c | 1442 | |
c8c2afe3 | 1443 | rtnl_lock(); |
40ca1988 | 1444 | dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO); |
c8c2afe3 | 1445 | rtnl_unlock(); |
6046136c EC |
1446 | priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM; |
1447 | ||
839fcaba MT |
1448 | ipoib_flush_paths(dev); |
1449 | return count; | |
1450 | } | |
1451 | ||
1452 | if (!strcmp(buf, "datagram\n")) { | |
1453 | clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); | |
6046136c | 1454 | |
c8c2afe3 | 1455 | rtnl_lock(); |
40ca1988 | 1456 | if (test_bit(IPOIB_FLAG_CSUM, &priv->flags)) { |
6046136c | 1457 | dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG; |
40ca1988 EC |
1458 | if (priv->hca_caps & IB_DEVICE_UD_TSO) |
1459 | dev->features |= NETIF_F_TSO; | |
1460 | } | |
bd360671 | 1461 | dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu)); |
c8c2afe3 EC |
1462 | rtnl_unlock(); |
1463 | ipoib_flush_paths(dev); | |
6046136c | 1464 | |
839fcaba MT |
1465 | return count; |
1466 | } | |
1467 | ||
1468 | return -EINVAL; | |
1469 | } | |
1470 | ||
551fd612 | 1471 | static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO, show_mode, set_mode); |
839fcaba MT |
1472 | |
1473 | int ipoib_cm_add_mode_attr(struct net_device *dev) | |
1474 | { | |
1475 | return device_create_file(&dev->dev, &dev_attr_mode); | |
1476 | } | |
1477 | ||
586a6934 | 1478 | static void ipoib_cm_create_srq(struct net_device *dev, int max_sge) |
839fcaba MT |
1479 | { |
1480 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1481 | struct ib_srq_init_attr srq_init_attr = { | |
1482 | .attr = { | |
1483 | .max_wr = ipoib_recvq_size, | |
586a6934 | 1484 | .max_sge = max_sge |
839fcaba MT |
1485 | } |
1486 | }; | |
7b3687df RD |
1487 | |
1488 | priv->cm.srq = ib_create_srq(priv->pd, &srq_init_attr); | |
1489 | if (IS_ERR(priv->cm.srq)) { | |
68e995a2 PS |
1490 | if (PTR_ERR(priv->cm.srq) != -ENOSYS) |
1491 | printk(KERN_WARNING "%s: failed to allocate SRQ, error %ld\n", | |
1492 | priv->ca->name, PTR_ERR(priv->cm.srq)); | |
7b3687df | 1493 | priv->cm.srq = NULL; |
68e995a2 | 1494 | return; |
7b3687df RD |
1495 | } |
1496 | ||
1497 | priv->cm.srq_ring = kzalloc(ipoib_recvq_size * sizeof *priv->cm.srq_ring, | |
1498 | GFP_KERNEL); | |
1499 | if (!priv->cm.srq_ring) { | |
68e995a2 | 1500 | printk(KERN_WARNING "%s: failed to allocate CM SRQ ring (%d entries)\n", |
7b3687df RD |
1501 | priv->ca->name, ipoib_recvq_size); |
1502 | ib_destroy_srq(priv->cm.srq); | |
1503 | priv->cm.srq = NULL; | |
7b3687df | 1504 | } |
7b3687df RD |
1505 | } |
1506 | ||
1507 | int ipoib_cm_dev_init(struct net_device *dev) | |
1508 | { | |
1509 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
586a6934 PS |
1510 | int i, ret; |
1511 | struct ib_device_attr attr; | |
839fcaba MT |
1512 | |
1513 | INIT_LIST_HEAD(&priv->cm.passive_ids); | |
1514 | INIT_LIST_HEAD(&priv->cm.reap_list); | |
1515 | INIT_LIST_HEAD(&priv->cm.start_list); | |
518b1646 MT |
1516 | INIT_LIST_HEAD(&priv->cm.rx_error_list); |
1517 | INIT_LIST_HEAD(&priv->cm.rx_flush_list); | |
1518 | INIT_LIST_HEAD(&priv->cm.rx_drain_list); | |
1519 | INIT_LIST_HEAD(&priv->cm.rx_reap_list); | |
839fcaba MT |
1520 | INIT_WORK(&priv->cm.start_task, ipoib_cm_tx_start); |
1521 | INIT_WORK(&priv->cm.reap_task, ipoib_cm_tx_reap); | |
1522 | INIT_WORK(&priv->cm.skb_task, ipoib_cm_skb_reap); | |
518b1646 | 1523 | INIT_WORK(&priv->cm.rx_reap_task, ipoib_cm_rx_reap); |
839fcaba MT |
1524 | INIT_DELAYED_WORK(&priv->cm.stale_task, ipoib_cm_stale_task); |
1525 | ||
1526 | skb_queue_head_init(&priv->cm.skb_queue); | |
1527 | ||
586a6934 PS |
1528 | ret = ib_query_device(priv->ca, &attr); |
1529 | if (ret) { | |
1530 | printk(KERN_WARNING "ib_query_device() failed with %d\n", ret); | |
1531 | return ret; | |
1532 | } | |
1533 | ||
1534 | ipoib_dbg(priv, "max_srq_sge=%d\n", attr.max_srq_sge); | |
1535 | ||
1536 | attr.max_srq_sge = min_t(int, IPOIB_CM_RX_SG, attr.max_srq_sge); | |
1537 | ipoib_cm_create_srq(dev, attr.max_srq_sge); | |
1538 | if (ipoib_cm_has_srq(dev)) { | |
1539 | priv->cm.max_cm_mtu = attr.max_srq_sge * PAGE_SIZE - 0x10; | |
1540 | priv->cm.num_frags = attr.max_srq_sge; | |
1541 | ipoib_dbg(priv, "max_cm_mtu = 0x%x, num_frags=%d\n", | |
1542 | priv->cm.max_cm_mtu, priv->cm.num_frags); | |
1543 | } else { | |
1544 | priv->cm.max_cm_mtu = IPOIB_CM_MTU; | |
1545 | priv->cm.num_frags = IPOIB_CM_RX_SG; | |
1546 | } | |
1547 | ||
a7d834c4 | 1548 | ipoib_cm_init_rx_wr(dev, &priv->cm.rx_wr, priv->cm.rx_sge); |
68e995a2 PS |
1549 | |
1550 | if (ipoib_cm_has_srq(dev)) { | |
1551 | for (i = 0; i < ipoib_recvq_size; ++i) { | |
1552 | if (!ipoib_cm_alloc_rx_skb(dev, priv->cm.srq_ring, i, | |
586a6934 | 1553 | priv->cm.num_frags - 1, |
68e995a2 PS |
1554 | priv->cm.srq_ring[i].mapping)) { |
1555 | ipoib_warn(priv, "failed to allocate " | |
1556 | "receive buffer %d\n", i); | |
1557 | ipoib_cm_dev_cleanup(dev); | |
1558 | return -ENOMEM; | |
1559 | } | |
7b3687df | 1560 | |
68e995a2 PS |
1561 | if (ipoib_cm_post_receive_srq(dev, i)) { |
1562 | ipoib_warn(priv, "ipoib_cm_post_receive_srq " | |
1563 | "failed for buf %d\n", i); | |
1564 | ipoib_cm_dev_cleanup(dev); | |
1565 | return -EIO; | |
1566 | } | |
839fcaba MT |
1567 | } |
1568 | } | |
1569 | ||
1570 | priv->dev->dev_addr[0] = IPOIB_FLAGS_RC; | |
1571 | return 0; | |
1572 | } | |
1573 | ||
1574 | void ipoib_cm_dev_cleanup(struct net_device *dev) | |
1575 | { | |
1576 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1efb6144 | 1577 | int ret; |
839fcaba MT |
1578 | |
1579 | if (!priv->cm.srq) | |
1580 | return; | |
1581 | ||
1582 | ipoib_dbg(priv, "Cleanup ipoib connected mode.\n"); | |
1583 | ||
1584 | ret = ib_destroy_srq(priv->cm.srq); | |
1585 | if (ret) | |
1586 | ipoib_warn(priv, "ib_destroy_srq failed: %d\n", ret); | |
1587 | ||
1588 | priv->cm.srq = NULL; | |
1589 | if (!priv->cm.srq_ring) | |
1590 | return; | |
1efb6144 RD |
1591 | |
1592 | ipoib_cm_free_rx_ring(dev, priv->cm.srq_ring); | |
839fcaba MT |
1593 | priv->cm.srq_ring = NULL; |
1594 | } |