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