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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> | |
839fcaba MT |
34 | #include <net/dst.h> |
35 | #include <net/icmp.h> | |
36 | #include <linux/icmpv6.h> | |
518b1646 | 37 | #include <linux/delay.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
10313cbb | 39 | #include <linux/vmalloc.h> |
fec14d2f | 40 | #include <linux/moduleparam.h> |
174cd4b1 | 41 | #include <linux/sched/signal.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 | ||
fc791b63 PA |
67 | #define IPOIB_CM_RX_RESERVE (ALIGN(IPOIB_HARD_LEN, 16) - IPOIB_ENCAP_LEN) |
68 | ||
518b1646 MT |
69 | static struct ib_qp_attr ipoib_cm_err_attr = { |
70 | .qp_state = IB_QPS_ERR | |
71 | }; | |
72 | ||
09f60f8f | 73 | #define IPOIB_CM_RX_DRAIN_WRID 0xffffffff |
518b1646 | 74 | |
ec56dc0b | 75 | static struct ib_send_wr ipoib_cm_rx_drain_wr = { |
ec56dc0b | 76 | .opcode = IB_WR_SEND, |
518b1646 MT |
77 | }; |
78 | ||
839fcaba MT |
79 | static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, |
80 | struct ib_cm_event *event); | |
81 | ||
1812063b | 82 | static void ipoib_cm_dma_unmap_rx(struct ipoib_dev_priv *priv, int frags, |
839fcaba MT |
83 | u64 mapping[IPOIB_CM_RX_SG]) |
84 | { | |
85 | int i; | |
86 | ||
87 | ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_CM_HEAD_SIZE, DMA_FROM_DEVICE); | |
88 | ||
1812063b | 89 | for (i = 0; i < frags; ++i) |
787adb9d | 90 | ib_dma_unmap_page(priv->ca, mapping[i + 1], PAGE_SIZE, DMA_FROM_DEVICE); |
839fcaba MT |
91 | } |
92 | ||
68e995a2 | 93 | static int ipoib_cm_post_receive_srq(struct net_device *dev, int id) |
839fcaba | 94 | { |
c1048aff | 95 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
839fcaba MT |
96 | struct ib_recv_wr *bad_wr; |
97 | int i, ret; | |
98 | ||
1b524963 | 99 | priv->cm.rx_wr.wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV; |
839fcaba | 100 | |
586a6934 | 101 | for (i = 0; i < priv->cm.num_frags; ++i) |
839fcaba MT |
102 | priv->cm.rx_sge[i].addr = priv->cm.srq_ring[id].mapping[i]; |
103 | ||
104 | ret = ib_post_srq_recv(priv->cm.srq, &priv->cm.rx_wr, &bad_wr); | |
105 | if (unlikely(ret)) { | |
106 | ipoib_warn(priv, "post srq failed for buf %d (%d)\n", id, ret); | |
586a6934 | 107 | ipoib_cm_dma_unmap_rx(priv, priv->cm.num_frags - 1, |
1812063b | 108 | priv->cm.srq_ring[id].mapping); |
839fcaba MT |
109 | dev_kfree_skb_any(priv->cm.srq_ring[id].skb); |
110 | priv->cm.srq_ring[id].skb = NULL; | |
111 | } | |
112 | ||
113 | return ret; | |
114 | } | |
115 | ||
68e995a2 | 116 | static int ipoib_cm_post_receive_nonsrq(struct net_device *dev, |
a7d834c4 RD |
117 | struct ipoib_cm_rx *rx, |
118 | struct ib_recv_wr *wr, | |
119 | struct ib_sge *sge, int id) | |
68e995a2 | 120 | { |
c1048aff | 121 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
68e995a2 PS |
122 | struct ib_recv_wr *bad_wr; |
123 | int i, ret; | |
124 | ||
a7d834c4 | 125 | wr->wr_id = id | IPOIB_OP_CM | IPOIB_OP_RECV; |
68e995a2 PS |
126 | |
127 | for (i = 0; i < IPOIB_CM_RX_SG; ++i) | |
a7d834c4 | 128 | sge[i].addr = rx->rx_ring[id].mapping[i]; |
68e995a2 | 129 | |
a7d834c4 | 130 | ret = ib_post_recv(rx->qp, wr, &bad_wr); |
68e995a2 PS |
131 | if (unlikely(ret)) { |
132 | ipoib_warn(priv, "post recv failed for buf %d (%d)\n", id, ret); | |
133 | ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1, | |
134 | rx->rx_ring[id].mapping); | |
135 | dev_kfree_skb_any(rx->rx_ring[id].skb); | |
136 | rx->rx_ring[id].skb = NULL; | |
137 | } | |
138 | ||
139 | return ret; | |
140 | } | |
141 | ||
142 | static struct sk_buff *ipoib_cm_alloc_rx_skb(struct net_device *dev, | |
143 | struct ipoib_cm_rx_buf *rx_ring, | |
144 | int id, int frags, | |
22252b4e TA |
145 | u64 mapping[IPOIB_CM_RX_SG], |
146 | gfp_t gfp) | |
839fcaba | 147 | { |
c1048aff | 148 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
839fcaba MT |
149 | struct sk_buff *skb; |
150 | int i; | |
151 | ||
fc791b63 | 152 | skb = dev_alloc_skb(ALIGN(IPOIB_CM_HEAD_SIZE + IPOIB_PSEUDO_LEN, 16)); |
839fcaba | 153 | if (unlikely(!skb)) |
1812063b | 154 | return NULL; |
839fcaba MT |
155 | |
156 | /* | |
fc791b63 | 157 | * IPoIB adds a IPOIB_ENCAP_LEN byte header, this will align the |
839fcaba MT |
158 | * IP header to a multiple of 16. |
159 | */ | |
fc791b63 | 160 | skb_reserve(skb, IPOIB_CM_RX_RESERVE); |
839fcaba MT |
161 | |
162 | mapping[0] = ib_dma_map_single(priv->ca, skb->data, IPOIB_CM_HEAD_SIZE, | |
163 | DMA_FROM_DEVICE); | |
164 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0]))) { | |
165 | dev_kfree_skb_any(skb); | |
1812063b | 166 | return NULL; |
839fcaba MT |
167 | } |
168 | ||
1812063b | 169 | for (i = 0; i < frags; i++) { |
22252b4e | 170 | struct page *page = alloc_page(gfp); |
839fcaba MT |
171 | |
172 | if (!page) | |
173 | goto partial_error; | |
174 | skb_fill_page_desc(skb, i, page, 0, PAGE_SIZE); | |
175 | ||
5581be3b | 176 | mapping[i + 1] = ib_dma_map_page(priv->ca, page, |
6371ea3d | 177 | 0, PAGE_SIZE, DMA_FROM_DEVICE); |
839fcaba MT |
178 | if (unlikely(ib_dma_mapping_error(priv->ca, mapping[i + 1]))) |
179 | goto partial_error; | |
180 | } | |
181 | ||
68e995a2 | 182 | rx_ring[id].skb = skb; |
1812063b | 183 | return skb; |
839fcaba MT |
184 | |
185 | partial_error: | |
186 | ||
187 | ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_CM_HEAD_SIZE, DMA_FROM_DEVICE); | |
188 | ||
841adfca | 189 | for (; i > 0; --i) |
787adb9d | 190 | ib_dma_unmap_page(priv->ca, mapping[i], PAGE_SIZE, DMA_FROM_DEVICE); |
839fcaba | 191 | |
8a2e65f8 | 192 | dev_kfree_skb_any(skb); |
1812063b | 193 | return NULL; |
839fcaba MT |
194 | } |
195 | ||
1efb6144 RD |
196 | static void ipoib_cm_free_rx_ring(struct net_device *dev, |
197 | struct ipoib_cm_rx_buf *rx_ring) | |
198 | { | |
c1048aff | 199 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1efb6144 RD |
200 | int i; |
201 | ||
202 | for (i = 0; i < ipoib_recvq_size; ++i) | |
203 | if (rx_ring[i].skb) { | |
204 | ipoib_cm_dma_unmap_rx(priv, IPOIB_CM_RX_SG - 1, | |
205 | rx_ring[i].mapping); | |
206 | dev_kfree_skb_any(rx_ring[i].skb); | |
207 | } | |
208 | ||
b1404069 | 209 | vfree(rx_ring); |
1efb6144 RD |
210 | } |
211 | ||
2337f809 | 212 | static void ipoib_cm_start_rx_drain(struct ipoib_dev_priv *priv) |
518b1646 | 213 | { |
ec56dc0b MT |
214 | struct ib_send_wr *bad_wr; |
215 | struct ipoib_cm_rx *p; | |
518b1646 | 216 | |
ec56dc0b | 217 | /* We only reserved 1 extra slot in CQ for drain WRs, so |
518b1646 MT |
218 | * make sure we have at most 1 outstanding WR. */ |
219 | if (list_empty(&priv->cm.rx_flush_list) || | |
220 | !list_empty(&priv->cm.rx_drain_list)) | |
221 | return; | |
222 | ||
ec56dc0b MT |
223 | /* |
224 | * QPs on flush list are error state. This way, a "flush | |
225 | * error" WC will be immediately generated for each WR we post. | |
226 | */ | |
227 | p = list_entry(priv->cm.rx_flush_list.next, typeof(*p), list); | |
14d3a3b2 | 228 | ipoib_cm_rx_drain_wr.wr_id = IPOIB_CM_RX_DRAIN_WRID; |
ec56dc0b MT |
229 | if (ib_post_send(p->qp, &ipoib_cm_rx_drain_wr, &bad_wr)) |
230 | ipoib_warn(priv, "failed to post drain wr\n"); | |
518b1646 MT |
231 | |
232 | list_splice_init(&priv->cm.rx_flush_list, &priv->cm.rx_drain_list); | |
233 | } | |
234 | ||
235 | static void ipoib_cm_rx_event_handler(struct ib_event *event, void *ctx) | |
236 | { | |
237 | struct ipoib_cm_rx *p = ctx; | |
c1048aff | 238 | struct ipoib_dev_priv *priv = ipoib_priv(p->dev); |
518b1646 MT |
239 | unsigned long flags; |
240 | ||
241 | if (event->event != IB_EVENT_QP_LAST_WQE_REACHED) | |
242 | return; | |
243 | ||
244 | spin_lock_irqsave(&priv->lock, flags); | |
245 | list_move(&p->list, &priv->cm.rx_flush_list); | |
246 | p->state = IPOIB_CM_RX_FLUSH; | |
247 | ipoib_cm_start_rx_drain(priv); | |
248 | spin_unlock_irqrestore(&priv->lock, flags); | |
249 | } | |
250 | ||
839fcaba MT |
251 | static struct ib_qp *ipoib_cm_create_rx_qp(struct net_device *dev, |
252 | struct ipoib_cm_rx *p) | |
253 | { | |
c1048aff | 254 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
839fcaba | 255 | struct ib_qp_init_attr attr = { |
518b1646 | 256 | .event_handler = ipoib_cm_rx_event_handler, |
f56bcd80 EC |
257 | .send_cq = priv->recv_cq, /* For drain WR */ |
258 | .recv_cq = priv->recv_cq, | |
839fcaba | 259 | .srq = priv->cm.srq, |
ec56dc0b | 260 | .cap.max_send_wr = 1, /* For drain WR */ |
839fcaba MT |
261 | .cap.max_send_sge = 1, /* FIXME: 0 Seems not to work */ |
262 | .sq_sig_type = IB_SIGNAL_ALL_WR, | |
263 | .qp_type = IB_QPT_RC, | |
264 | .qp_context = p, | |
265 | }; | |
68e995a2 PS |
266 | |
267 | if (!ipoib_cm_has_srq(dev)) { | |
268 | attr.cap.max_recv_wr = ipoib_recvq_size; | |
269 | attr.cap.max_recv_sge = IPOIB_CM_RX_SG; | |
270 | } | |
271 | ||
839fcaba MT |
272 | return ib_create_qp(priv->pd, &attr); |
273 | } | |
274 | ||
275 | static int ipoib_cm_modify_rx_qp(struct net_device *dev, | |
68e995a2 PS |
276 | struct ib_cm_id *cm_id, struct ib_qp *qp, |
277 | unsigned psn) | |
839fcaba | 278 | { |
c1048aff | 279 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
839fcaba MT |
280 | struct ib_qp_attr qp_attr; |
281 | int qp_attr_mask, ret; | |
282 | ||
283 | qp_attr.qp_state = IB_QPS_INIT; | |
284 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
285 | if (ret) { | |
286 | ipoib_warn(priv, "failed to init QP attr for INIT: %d\n", ret); | |
287 | return ret; | |
288 | } | |
289 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); | |
290 | if (ret) { | |
291 | ipoib_warn(priv, "failed to modify QP to INIT: %d\n", ret); | |
292 | return ret; | |
293 | } | |
294 | qp_attr.qp_state = IB_QPS_RTR; | |
295 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
296 | if (ret) { | |
297 | ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); | |
298 | return ret; | |
299 | } | |
300 | qp_attr.rq_psn = psn; | |
301 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); | |
302 | if (ret) { | |
303 | ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); | |
304 | return ret; | |
305 | } | |
ec56dc0b MT |
306 | |
307 | /* | |
308 | * Current Mellanox HCA firmware won't generate completions | |
309 | * with error for drain WRs unless the QP has been moved to | |
310 | * RTS first. This work-around leaves a window where a QP has | |
311 | * moved to error asynchronously, but this will eventually get | |
312 | * fixed in firmware, so let's not error out if modify QP | |
313 | * fails. | |
314 | */ | |
315 | qp_attr.qp_state = IB_QPS_RTS; | |
316 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
317 | if (ret) { | |
318 | ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); | |
319 | return 0; | |
320 | } | |
321 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); | |
322 | if (ret) { | |
323 | ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); | |
324 | return 0; | |
325 | } | |
326 | ||
839fcaba MT |
327 | return 0; |
328 | } | |
329 | ||
a7d834c4 RD |
330 | static void ipoib_cm_init_rx_wr(struct net_device *dev, |
331 | struct ib_recv_wr *wr, | |
332 | struct ib_sge *sge) | |
333 | { | |
c1048aff | 334 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
a7d834c4 RD |
335 | int i; |
336 | ||
337 | for (i = 0; i < priv->cm.num_frags; ++i) | |
77b1f996 | 338 | sge[i].lkey = priv->pd->local_dma_lkey; |
a7d834c4 RD |
339 | |
340 | sge[0].length = IPOIB_CM_HEAD_SIZE; | |
341 | for (i = 1; i < priv->cm.num_frags; ++i) | |
342 | sge[i].length = PAGE_SIZE; | |
343 | ||
344 | wr->next = NULL; | |
e0819816 | 345 | wr->sg_list = sge; |
a7d834c4 RD |
346 | wr->num_sge = priv->cm.num_frags; |
347 | } | |
348 | ||
68e995a2 PS |
349 | static int ipoib_cm_nonsrq_init_rx(struct net_device *dev, struct ib_cm_id *cm_id, |
350 | struct ipoib_cm_rx *rx) | |
351 | { | |
c1048aff | 352 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
a7d834c4 RD |
353 | struct { |
354 | struct ib_recv_wr wr; | |
355 | struct ib_sge sge[IPOIB_CM_RX_SG]; | |
356 | } *t; | |
68e995a2 PS |
357 | int ret; |
358 | int i; | |
359 | ||
948579cd | 360 | rx->rx_ring = vzalloc(ipoib_recvq_size * sizeof *rx->rx_ring); |
74226649 | 361 | if (!rx->rx_ring) |
68e995a2 | 362 | return -ENOMEM; |
b1404069 | 363 | |
a7d834c4 RD |
364 | t = kmalloc(sizeof *t, GFP_KERNEL); |
365 | if (!t) { | |
366 | ret = -ENOMEM; | |
c5e8f57b | 367 | goto err_free_1; |
a7d834c4 RD |
368 | } |
369 | ||
370 | ipoib_cm_init_rx_wr(dev, &t->wr, t->sge); | |
371 | ||
68e995a2 PS |
372 | spin_lock_irq(&priv->lock); |
373 | ||
374 | if (priv->cm.nonsrq_conn_qp >= ipoib_max_conn_qp) { | |
375 | spin_unlock_irq(&priv->lock); | |
376 | ib_send_cm_rej(cm_id, IB_CM_REJ_NO_QP, NULL, 0, NULL, 0); | |
377 | ret = -EINVAL; | |
378 | goto err_free; | |
379 | } else | |
380 | ++priv->cm.nonsrq_conn_qp; | |
381 | ||
382 | spin_unlock_irq(&priv->lock); | |
383 | ||
384 | for (i = 0; i < ipoib_recvq_size; ++i) { | |
385 | if (!ipoib_cm_alloc_rx_skb(dev, rx->rx_ring, i, IPOIB_CM_RX_SG - 1, | |
22252b4e TA |
386 | rx->rx_ring[i].mapping, |
387 | GFP_KERNEL)) { | |
68e995a2 | 388 | ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); |
8f71c1a2 BVA |
389 | ret = -ENOMEM; |
390 | goto err_count; | |
a7d834c4 RD |
391 | } |
392 | ret = ipoib_cm_post_receive_nonsrq(dev, rx, &t->wr, t->sge, i); | |
68e995a2 PS |
393 | if (ret) { |
394 | ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq " | |
395 | "failed for buf %d\n", i); | |
396 | ret = -EIO; | |
397 | goto err_count; | |
398 | } | |
399 | } | |
400 | ||
401 | rx->recv_count = ipoib_recvq_size; | |
402 | ||
a7d834c4 RD |
403 | kfree(t); |
404 | ||
68e995a2 PS |
405 | return 0; |
406 | ||
407 | err_count: | |
408 | spin_lock_irq(&priv->lock); | |
409 | --priv->cm.nonsrq_conn_qp; | |
410 | spin_unlock_irq(&priv->lock); | |
411 | ||
412 | err_free: | |
a7d834c4 | 413 | kfree(t); |
c5e8f57b ZY |
414 | |
415 | err_free_1: | |
68e995a2 PS |
416 | ipoib_cm_free_rx_ring(dev, rx->rx_ring); |
417 | ||
418 | return ret; | |
419 | } | |
420 | ||
839fcaba MT |
421 | static int ipoib_cm_send_rep(struct net_device *dev, struct ib_cm_id *cm_id, |
422 | struct ib_qp *qp, struct ib_cm_req_event_param *req, | |
423 | unsigned psn) | |
424 | { | |
c1048aff | 425 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
839fcaba MT |
426 | struct ipoib_cm_data data = {}; |
427 | struct ib_cm_rep_param rep = {}; | |
428 | ||
429 | data.qpn = cpu_to_be32(priv->qp->qp_num); | |
430 | data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); | |
431 | ||
432 | rep.private_data = &data; | |
433 | rep.private_data_len = sizeof data; | |
434 | rep.flow_control = 0; | |
435 | rep.rnr_retry_count = req->rnr_retry_count; | |
68e995a2 | 436 | rep.srq = ipoib_cm_has_srq(dev); |
839fcaba MT |
437 | rep.qp_num = qp->qp_num; |
438 | rep.starting_psn = psn; | |
439 | return ib_send_cm_rep(cm_id, &rep); | |
440 | } | |
441 | ||
442 | static int ipoib_cm_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
443 | { | |
444 | struct net_device *dev = cm_id->context; | |
c1048aff | 445 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
839fcaba | 446 | struct ipoib_cm_rx *p; |
839fcaba MT |
447 | unsigned psn; |
448 | int ret; | |
449 | ||
450 | ipoib_dbg(priv, "REQ arrived\n"); | |
451 | p = kzalloc(sizeof *p, GFP_KERNEL); | |
452 | if (!p) | |
453 | return -ENOMEM; | |
454 | p->dev = dev; | |
455 | p->id = cm_id; | |
3ec7393a MT |
456 | cm_id->context = p; |
457 | p->state = IPOIB_CM_RX_LIVE; | |
458 | p->jiffies = jiffies; | |
459 | INIT_LIST_HEAD(&p->list); | |
460 | ||
839fcaba MT |
461 | p->qp = ipoib_cm_create_rx_qp(dev, p); |
462 | if (IS_ERR(p->qp)) { | |
463 | ret = PTR_ERR(p->qp); | |
464 | goto err_qp; | |
465 | } | |
466 | ||
50bea5c0 | 467 | psn = prandom_u32() & 0xffffff; |
839fcaba MT |
468 | ret = ipoib_cm_modify_rx_qp(dev, cm_id, p->qp, psn); |
469 | if (ret) | |
470 | goto err_modify; | |
471 | ||
68e995a2 PS |
472 | if (!ipoib_cm_has_srq(dev)) { |
473 | ret = ipoib_cm_nonsrq_init_rx(dev, cm_id, p); | |
474 | if (ret) | |
475 | goto err_modify; | |
476 | } | |
477 | ||
3ec7393a | 478 | spin_lock_irq(&priv->lock); |
0b39578b | 479 | queue_delayed_work(priv->wq, |
3ec7393a MT |
480 | &priv->cm.stale_task, IPOIB_CM_RX_DELAY); |
481 | /* Add this entry to passive ids list head, but do not re-add it | |
482 | * if IB_EVENT_QP_LAST_WQE_REACHED has moved it to flush list. */ | |
483 | p->jiffies = jiffies; | |
484 | if (p->state == IPOIB_CM_RX_LIVE) | |
485 | list_move(&p->list, &priv->cm.passive_ids); | |
486 | spin_unlock_irq(&priv->lock); | |
487 | ||
839fcaba MT |
488 | ret = ipoib_cm_send_rep(dev, cm_id, p->qp, &event->param.req_rcvd, psn); |
489 | if (ret) { | |
490 | ipoib_warn(priv, "failed to send REP: %d\n", ret); | |
3ec7393a MT |
491 | if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) |
492 | ipoib_warn(priv, "unable to move qp to error state\n"); | |
839fcaba | 493 | } |
839fcaba MT |
494 | return 0; |
495 | ||
839fcaba MT |
496 | err_modify: |
497 | ib_destroy_qp(p->qp); | |
498 | err_qp: | |
499 | kfree(p); | |
500 | return ret; | |
501 | } | |
502 | ||
503 | static int ipoib_cm_rx_handler(struct ib_cm_id *cm_id, | |
504 | struct ib_cm_event *event) | |
505 | { | |
506 | struct ipoib_cm_rx *p; | |
507 | struct ipoib_dev_priv *priv; | |
839fcaba MT |
508 | |
509 | switch (event->event) { | |
510 | case IB_CM_REQ_RECEIVED: | |
511 | return ipoib_cm_req_handler(cm_id, event); | |
512 | case IB_CM_DREQ_RECEIVED: | |
513 | p = cm_id->context; | |
514 | ib_send_cm_drep(cm_id, NULL, 0); | |
515 | /* Fall through */ | |
516 | case IB_CM_REJ_RECEIVED: | |
517 | p = cm_id->context; | |
c1048aff | 518 | priv = ipoib_priv(p->dev); |
518b1646 MT |
519 | if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE)) |
520 | ipoib_warn(priv, "unable to move qp to error state\n"); | |
521 | /* Fall through */ | |
839fcaba MT |
522 | default: |
523 | return 0; | |
524 | } | |
525 | } | |
526 | /* Adjust length of skb with fragments to match received data */ | |
527 | static void skb_put_frags(struct sk_buff *skb, unsigned int hdr_space, | |
1812063b | 528 | unsigned int length, struct sk_buff *toskb) |
839fcaba MT |
529 | { |
530 | int i, num_frags; | |
531 | unsigned int size; | |
532 | ||
533 | /* put header into skb */ | |
534 | size = min(length, hdr_space); | |
535 | skb->tail += size; | |
536 | skb->len += size; | |
537 | length -= size; | |
538 | ||
539 | num_frags = skb_shinfo(skb)->nr_frags; | |
540 | for (i = 0; i < num_frags; i++) { | |
541 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
542 | ||
543 | if (length == 0) { | |
544 | /* don't need this page */ | |
5581be3b IC |
545 | skb_fill_page_desc(toskb, i, skb_frag_page(frag), |
546 | 0, PAGE_SIZE); | |
839fcaba MT |
547 | --skb_shinfo(skb)->nr_frags; |
548 | } else { | |
549 | size = min(length, (unsigned) PAGE_SIZE); | |
550 | ||
9e903e08 | 551 | skb_frag_size_set(frag, size); |
839fcaba MT |
552 | skb->data_len += size; |
553 | skb->truesize += size; | |
554 | skb->len += size; | |
555 | length -= size; | |
556 | } | |
557 | } | |
558 | } | |
559 | ||
560 | void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) | |
561 | { | |
c1048aff | 562 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
68e995a2 | 563 | struct ipoib_cm_rx_buf *rx_ring; |
1b524963 | 564 | unsigned int wr_id = wc->wr_id & ~(IPOIB_OP_CM | IPOIB_OP_RECV); |
1812063b | 565 | struct sk_buff *skb, *newskb; |
839fcaba MT |
566 | struct ipoib_cm_rx *p; |
567 | unsigned long flags; | |
568 | u64 mapping[IPOIB_CM_RX_SG]; | |
1812063b | 569 | int frags; |
68e995a2 | 570 | int has_srq; |
f89271da | 571 | struct sk_buff *small_skb; |
839fcaba | 572 | |
a89875fc RD |
573 | ipoib_dbg_data(priv, "cm recv completion: id %d, status: %d\n", |
574 | wr_id, wc->status); | |
839fcaba MT |
575 | |
576 | if (unlikely(wr_id >= ipoib_recvq_size)) { | |
1b524963 | 577 | if (wr_id == (IPOIB_CM_RX_DRAIN_WRID & ~(IPOIB_OP_CM | IPOIB_OP_RECV))) { |
518b1646 MT |
578 | spin_lock_irqsave(&priv->lock, flags); |
579 | list_splice_init(&priv->cm.rx_drain_list, &priv->cm.rx_reap_list); | |
580 | ipoib_cm_start_rx_drain(priv); | |
0b39578b | 581 | queue_work(priv->wq, &priv->cm.rx_reap_task); |
518b1646 MT |
582 | spin_unlock_irqrestore(&priv->lock, flags); |
583 | } else | |
584 | ipoib_warn(priv, "cm recv completion event with wrid %d (> %d)\n", | |
585 | wr_id, ipoib_recvq_size); | |
839fcaba MT |
586 | return; |
587 | } | |
588 | ||
68e995a2 PS |
589 | p = wc->qp->qp_context; |
590 | ||
591 | has_srq = ipoib_cm_has_srq(dev); | |
592 | rx_ring = has_srq ? priv->cm.srq_ring : p->rx_ring; | |
593 | ||
594 | skb = rx_ring[wr_id].skb; | |
839fcaba MT |
595 | |
596 | if (unlikely(wc->status != IB_WC_SUCCESS)) { | |
597 | ipoib_dbg(priv, "cm recv error " | |
598 | "(status=%d, wrid=%d vend_err %x)\n", | |
599 | wc->status, wr_id, wc->vendor_err); | |
de903512 | 600 | ++dev->stats.rx_dropped; |
68e995a2 PS |
601 | if (has_srq) |
602 | goto repost; | |
603 | else { | |
604 | if (!--p->recv_count) { | |
605 | spin_lock_irqsave(&priv->lock, flags); | |
606 | list_move(&p->list, &priv->cm.rx_reap_list); | |
607 | spin_unlock_irqrestore(&priv->lock, flags); | |
0b39578b | 608 | queue_work(priv->wq, &priv->cm.rx_reap_task); |
68e995a2 PS |
609 | } |
610 | return; | |
611 | } | |
839fcaba MT |
612 | } |
613 | ||
fd312561 | 614 | if (unlikely(!(wr_id & IPOIB_CM_RX_UPDATE_MASK))) { |
d6ef7d68 | 615 | if (p && time_after_eq(jiffies, p->jiffies + IPOIB_CM_RX_UPDATE_TIME)) { |
839fcaba MT |
616 | spin_lock_irqsave(&priv->lock, flags); |
617 | p->jiffies = jiffies; | |
518b1646 MT |
618 | /* Move this entry to list head, but do not re-add it |
619 | * if it has been moved out of list. */ | |
620 | if (p->state == IPOIB_CM_RX_LIVE) | |
839fcaba MT |
621 | list_move(&p->list, &priv->cm.passive_ids); |
622 | spin_unlock_irqrestore(&priv->lock, flags); | |
839fcaba MT |
623 | } |
624 | } | |
625 | ||
f89271da EC |
626 | if (wc->byte_len < IPOIB_CM_COPYBREAK) { |
627 | int dlen = wc->byte_len; | |
628 | ||
fc791b63 | 629 | small_skb = dev_alloc_skb(dlen + IPOIB_CM_RX_RESERVE); |
f89271da | 630 | if (small_skb) { |
fc791b63 | 631 | skb_reserve(small_skb, IPOIB_CM_RX_RESERVE); |
f89271da EC |
632 | ib_dma_sync_single_for_cpu(priv->ca, rx_ring[wr_id].mapping[0], |
633 | dlen, DMA_FROM_DEVICE); | |
634 | skb_copy_from_linear_data(skb, small_skb->data, dlen); | |
635 | ib_dma_sync_single_for_device(priv->ca, rx_ring[wr_id].mapping[0], | |
636 | dlen, DMA_FROM_DEVICE); | |
637 | skb_put(small_skb, dlen); | |
638 | skb = small_skb; | |
639 | goto copied; | |
640 | } | |
641 | } | |
642 | ||
1812063b MT |
643 | frags = PAGE_ALIGN(wc->byte_len - min(wc->byte_len, |
644 | (unsigned)IPOIB_CM_HEAD_SIZE)) / PAGE_SIZE; | |
645 | ||
22252b4e TA |
646 | newskb = ipoib_cm_alloc_rx_skb(dev, rx_ring, wr_id, frags, |
647 | mapping, GFP_ATOMIC); | |
1812063b | 648 | if (unlikely(!newskb)) { |
839fcaba MT |
649 | /* |
650 | * If we can't allocate a new RX buffer, dump | |
651 | * this packet and reuse the old buffer. | |
652 | */ | |
653 | ipoib_dbg(priv, "failed to allocate receive buffer %d\n", wr_id); | |
de903512 | 654 | ++dev->stats.rx_dropped; |
839fcaba MT |
655 | goto repost; |
656 | } | |
657 | ||
68e995a2 PS |
658 | ipoib_cm_dma_unmap_rx(priv, frags, rx_ring[wr_id].mapping); |
659 | memcpy(rx_ring[wr_id].mapping, mapping, (frags + 1) * sizeof *mapping); | |
839fcaba MT |
660 | |
661 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", | |
662 | wc->byte_len, wc->slid); | |
663 | ||
1812063b | 664 | skb_put_frags(skb, IPOIB_CM_HEAD_SIZE, wc->byte_len, newskb); |
839fcaba | 665 | |
f89271da | 666 | copied: |
839fcaba | 667 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; |
fc791b63 | 668 | skb_add_pseudo_hdr(skb); |
839fcaba | 669 | |
de903512 RD |
670 | ++dev->stats.rx_packets; |
671 | dev->stats.rx_bytes += skb->len; | |
839fcaba MT |
672 | |
673 | skb->dev = dev; | |
674 | /* XXX get correct PACKET_ type here */ | |
675 | skb->pkt_type = PACKET_HOST; | |
8d1cc86a | 676 | netif_receive_skb(skb); |
839fcaba MT |
677 | |
678 | repost: | |
68e995a2 PS |
679 | if (has_srq) { |
680 | if (unlikely(ipoib_cm_post_receive_srq(dev, wr_id))) | |
681 | ipoib_warn(priv, "ipoib_cm_post_receive_srq failed " | |
682 | "for buf %d\n", wr_id); | |
683 | } else { | |
a7d834c4 RD |
684 | if (unlikely(ipoib_cm_post_receive_nonsrq(dev, p, |
685 | &priv->cm.rx_wr, | |
686 | priv->cm.rx_sge, | |
687 | wr_id))) { | |
68e995a2 PS |
688 | --p->recv_count; |
689 | ipoib_warn(priv, "ipoib_cm_post_receive_nonsrq failed " | |
690 | "for buf %d\n", wr_id); | |
691 | } | |
692 | } | |
839fcaba MT |
693 | } |
694 | ||
695 | static inline int post_send(struct ipoib_dev_priv *priv, | |
696 | struct ipoib_cm_tx *tx, | |
697 | unsigned int wr_id, | |
c4268778 | 698 | struct ipoib_tx_buf *tx_req) |
839fcaba MT |
699 | { |
700 | struct ib_send_wr *bad_wr; | |
701 | ||
c4268778 | 702 | ipoib_build_sge(priv, tx_req); |
839fcaba | 703 | |
e622f2f4 | 704 | priv->tx_wr.wr.wr_id = wr_id | IPOIB_OP_CM; |
839fcaba | 705 | |
e622f2f4 | 706 | return ib_post_send(tx->qp, &priv->tx_wr.wr, &bad_wr); |
839fcaba MT |
707 | } |
708 | ||
709 | void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx) | |
710 | { | |
c1048aff | 711 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
c4268778 | 712 | struct ipoib_tx_buf *tx_req; |
a48f509b | 713 | int rc; |
78a50a5e | 714 | unsigned usable_sge = tx->max_send_sge - !!skb_headlen(skb); |
839fcaba MT |
715 | |
716 | if (unlikely(skb->len > tx->mtu)) { | |
717 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", | |
718 | skb->len, tx->mtu); | |
de903512 RD |
719 | ++dev->stats.tx_dropped; |
720 | ++dev->stats.tx_errors; | |
77d8e1ef | 721 | ipoib_cm_skb_too_long(dev, skb, tx->mtu - IPOIB_ENCAP_LEN); |
839fcaba MT |
722 | return; |
723 | } | |
78a50a5e HWR |
724 | if (skb_shinfo(skb)->nr_frags > usable_sge) { |
725 | if (skb_linearize(skb) < 0) { | |
726 | ipoib_warn(priv, "skb could not be linearized\n"); | |
727 | ++dev->stats.tx_dropped; | |
728 | ++dev->stats.tx_errors; | |
729 | dev_kfree_skb_any(skb); | |
730 | return; | |
731 | } | |
732 | /* Does skb_linearize return ok without reducing nr_frags? */ | |
733 | if (skb_shinfo(skb)->nr_frags > usable_sge) { | |
734 | ipoib_warn(priv, "too many frags after skb linearize\n"); | |
735 | ++dev->stats.tx_dropped; | |
736 | ++dev->stats.tx_errors; | |
737 | dev_kfree_skb_any(skb); | |
738 | return; | |
739 | } | |
740 | } | |
839fcaba MT |
741 | ipoib_dbg_data(priv, "sending packet: head 0x%x length %d connection 0x%x\n", |
742 | tx->tx_head, skb->len, tx->qp->qp_num); | |
743 | ||
744 | /* | |
745 | * We put the skb into the tx_ring _before_ we call post_send() | |
746 | * because it's entirely possible that the completion handler will | |
747 | * run before we execute anything after the post_send(). That | |
748 | * means we have to make sure everything is properly recorded and | |
749 | * our state is consistent before we call post_send(). | |
750 | */ | |
751 | tx_req = &tx->tx_ring[tx->tx_head & (ipoib_sendq_size - 1)]; | |
752 | tx_req->skb = skb; | |
c4268778 YS |
753 | |
754 | if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) { | |
de903512 | 755 | ++dev->stats.tx_errors; |
839fcaba MT |
756 | dev_kfree_skb_any(skb); |
757 | return; | |
758 | } | |
759 | ||
7e5a90c2 SP |
760 | skb_orphan(skb); |
761 | skb_dst_drop(skb); | |
762 | ||
c4268778 | 763 | rc = post_send(priv, tx, tx->tx_head & (ipoib_sendq_size - 1), tx_req); |
a48f509b OG |
764 | if (unlikely(rc)) { |
765 | ipoib_warn(priv, "post_send failed, error %d\n", rc); | |
de903512 | 766 | ++dev->stats.tx_errors; |
c4268778 | 767 | ipoib_dma_unmap_tx(priv, tx_req); |
839fcaba MT |
768 | dev_kfree_skb_any(skb); |
769 | } else { | |
860e9538 | 770 | netif_trans_update(dev); |
839fcaba MT |
771 | ++tx->tx_head; |
772 | ||
1b524963 | 773 | if (++priv->tx_outstanding == ipoib_sendq_size) { |
839fcaba MT |
774 | ipoib_dbg(priv, "TX ring 0x%x full, stopping kernel net queue\n", |
775 | tx->qp->qp_num); | |
776 | netif_stop_queue(dev); | |
1ee9e2aa MM |
777 | rc = ib_req_notify_cq(priv->send_cq, |
778 | IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS); | |
779 | if (rc < 0) | |
780 | ipoib_warn(priv, "request notify on send CQ failed\n"); | |
781 | else if (rc) | |
782 | ipoib_send_comp_handler(priv->send_cq, dev); | |
839fcaba MT |
783 | } |
784 | } | |
785 | } | |
786 | ||
1b524963 | 787 | void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc) |
839fcaba | 788 | { |
c1048aff | 789 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1b524963 MT |
790 | struct ipoib_cm_tx *tx = wc->qp->qp_context; |
791 | unsigned int wr_id = wc->wr_id & ~IPOIB_OP_CM; | |
c4268778 | 792 | struct ipoib_tx_buf *tx_req; |
839fcaba MT |
793 | unsigned long flags; |
794 | ||
a89875fc RD |
795 | ipoib_dbg_data(priv, "cm send completion: id %d, status: %d\n", |
796 | wr_id, wc->status); | |
839fcaba MT |
797 | |
798 | if (unlikely(wr_id >= ipoib_sendq_size)) { | |
799 | ipoib_warn(priv, "cm send completion event with wrid %d (> %d)\n", | |
800 | wr_id, ipoib_sendq_size); | |
801 | return; | |
802 | } | |
803 | ||
804 | tx_req = &tx->tx_ring[wr_id]; | |
805 | ||
c4268778 | 806 | ipoib_dma_unmap_tx(priv, tx_req); |
839fcaba MT |
807 | |
808 | /* FIXME: is this right? Shouldn't we only increment on success? */ | |
de903512 RD |
809 | ++dev->stats.tx_packets; |
810 | dev->stats.tx_bytes += tx_req->skb->len; | |
839fcaba MT |
811 | |
812 | dev_kfree_skb_any(tx_req->skb); | |
813 | ||
943c246e RD |
814 | netif_tx_lock(dev); |
815 | ||
839fcaba | 816 | ++tx->tx_tail; |
1b524963 MT |
817 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
818 | netif_queue_stopped(dev) && | |
819 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
839fcaba | 820 | netif_wake_queue(dev); |
839fcaba MT |
821 | |
822 | if (wc->status != IB_WC_SUCCESS && | |
823 | wc->status != IB_WC_WR_FLUSH_ERR) { | |
824 | struct ipoib_neigh *neigh; | |
825 | ||
13ee429a FD |
826 | if (wc->status != IB_WC_RNR_RETRY_EXC_ERR) |
827 | ipoib_warn(priv, "failed cm send event (status=%d, wrid=%d vend_err %x)\n", | |
828 | wc->status, wr_id, wc->vendor_err); | |
829 | else | |
830 | ipoib_dbg(priv, "failed cm send event (status=%d, wrid=%d vend_err %x)\n", | |
831 | wc->status, wr_id, wc->vendor_err); | |
839fcaba | 832 | |
943c246e | 833 | spin_lock_irqsave(&priv->lock, flags); |
839fcaba MT |
834 | neigh = tx->neigh; |
835 | ||
836 | if (neigh) { | |
837 | neigh->cm = NULL; | |
b63b70d8 | 838 | ipoib_neigh_free(neigh); |
839fcaba MT |
839 | |
840 | tx->neigh = NULL; | |
841 | } | |
842 | ||
839fcaba MT |
843 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { |
844 | list_move(&tx->list, &priv->cm.reap_list); | |
0b39578b | 845 | queue_work(priv->wq, &priv->cm.reap_task); |
839fcaba MT |
846 | } |
847 | ||
848 | clear_bit(IPOIB_FLAG_OPER_UP, &tx->flags); | |
849 | ||
943c246e | 850 | spin_unlock_irqrestore(&priv->lock, flags); |
839fcaba MT |
851 | } |
852 | ||
943c246e | 853 | netif_tx_unlock(dev); |
839fcaba MT |
854 | } |
855 | ||
839fcaba MT |
856 | int ipoib_cm_dev_open(struct net_device *dev) |
857 | { | |
c1048aff | 858 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
839fcaba MT |
859 | int ret; |
860 | ||
861 | if (!IPOIB_CM_SUPPORTED(dev->dev_addr)) | |
862 | return 0; | |
863 | ||
864 | priv->cm.id = ib_create_cm_id(priv->ca, ipoib_cm_rx_handler, dev); | |
865 | if (IS_ERR(priv->cm.id)) { | |
866 | printk(KERN_WARNING "%s: failed to create CM ID\n", priv->ca->name); | |
347fcfbe | 867 | ret = PTR_ERR(priv->cm.id); |
518b1646 | 868 | goto err_cm; |
839fcaba MT |
869 | } |
870 | ||
871 | ret = ib_cm_listen(priv->cm.id, cpu_to_be64(IPOIB_CM_IETF_ID | priv->qp->qp_num), | |
73fec7fd | 872 | 0); |
839fcaba MT |
873 | if (ret) { |
874 | printk(KERN_WARNING "%s: failed to listen on ID 0x%llx\n", priv->ca->name, | |
875 | IPOIB_CM_IETF_ID | priv->qp->qp_num); | |
518b1646 | 876 | goto err_listen; |
839fcaba | 877 | } |
518b1646 | 878 | |
839fcaba | 879 | return 0; |
518b1646 MT |
880 | |
881 | err_listen: | |
882 | ib_destroy_cm_id(priv->cm.id); | |
883 | err_cm: | |
884 | priv->cm.id = NULL; | |
518b1646 | 885 | return ret; |
839fcaba MT |
886 | } |
887 | ||
efcd9971 RD |
888 | static void ipoib_cm_free_rx_reap_list(struct net_device *dev) |
889 | { | |
c1048aff | 890 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
efcd9971 RD |
891 | struct ipoib_cm_rx *rx, *n; |
892 | LIST_HEAD(list); | |
893 | ||
894 | spin_lock_irq(&priv->lock); | |
895 | list_splice_init(&priv->cm.rx_reap_list, &list); | |
896 | spin_unlock_irq(&priv->lock); | |
897 | ||
898 | list_for_each_entry_safe(rx, n, &list, list) { | |
899 | ib_destroy_cm_id(rx->id); | |
900 | ib_destroy_qp(rx->qp); | |
68e995a2 PS |
901 | if (!ipoib_cm_has_srq(dev)) { |
902 | ipoib_cm_free_rx_ring(priv->dev, rx->rx_ring); | |
903 | spin_lock_irq(&priv->lock); | |
904 | --priv->cm.nonsrq_conn_qp; | |
905 | spin_unlock_irq(&priv->lock); | |
906 | } | |
efcd9971 RD |
907 | kfree(rx); |
908 | } | |
909 | } | |
910 | ||
839fcaba MT |
911 | void ipoib_cm_dev_stop(struct net_device *dev) |
912 | { | |
c1048aff | 913 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
efcd9971 | 914 | struct ipoib_cm_rx *p; |
518b1646 | 915 | unsigned long begin; |
518b1646 | 916 | int ret; |
839fcaba | 917 | |
347fcfbe | 918 | if (!IPOIB_CM_SUPPORTED(dev->dev_addr) || !priv->cm.id) |
839fcaba MT |
919 | return; |
920 | ||
921 | ib_destroy_cm_id(priv->cm.id); | |
347fcfbe | 922 | priv->cm.id = NULL; |
518b1646 | 923 | |
37aebbde | 924 | spin_lock_irq(&priv->lock); |
839fcaba MT |
925 | while (!list_empty(&priv->cm.passive_ids)) { |
926 | p = list_entry(priv->cm.passive_ids.next, typeof(*p), list); | |
518b1646 MT |
927 | list_move(&p->list, &priv->cm.rx_error_list); |
928 | p->state = IPOIB_CM_RX_ERROR; | |
37aebbde | 929 | spin_unlock_irq(&priv->lock); |
518b1646 MT |
930 | ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); |
931 | if (ret) | |
932 | ipoib_warn(priv, "unable to move qp to error state: %d\n", ret); | |
933 | spin_lock_irq(&priv->lock); | |
934 | } | |
935 | ||
936 | /* Wait for all RX to be drained */ | |
937 | begin = jiffies; | |
938 | ||
939 | while (!list_empty(&priv->cm.rx_error_list) || | |
940 | !list_empty(&priv->cm.rx_flush_list) || | |
941 | !list_empty(&priv->cm.rx_drain_list)) { | |
8fd357a6 | 942 | if (time_after(jiffies, begin + 5 * HZ)) { |
518b1646 MT |
943 | ipoib_warn(priv, "RX drain timing out\n"); |
944 | ||
945 | /* | |
946 | * assume the HW is wedged and just free up everything. | |
947 | */ | |
ec229e5e PS |
948 | list_splice_init(&priv->cm.rx_flush_list, |
949 | &priv->cm.rx_reap_list); | |
950 | list_splice_init(&priv->cm.rx_error_list, | |
951 | &priv->cm.rx_reap_list); | |
952 | list_splice_init(&priv->cm.rx_drain_list, | |
953 | &priv->cm.rx_reap_list); | |
518b1646 MT |
954 | break; |
955 | } | |
956 | spin_unlock_irq(&priv->lock); | |
957 | msleep(1); | |
2dfbfc37 | 958 | ipoib_drain_cq(dev); |
518b1646 MT |
959 | spin_lock_irq(&priv->lock); |
960 | } | |
961 | ||
518b1646 MT |
962 | spin_unlock_irq(&priv->lock); |
963 | ||
efcd9971 | 964 | ipoib_cm_free_rx_reap_list(dev); |
839fcaba MT |
965 | |
966 | cancel_delayed_work(&priv->cm.stale_task); | |
967 | } | |
968 | ||
969 | static int ipoib_cm_rep_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
970 | { | |
971 | struct ipoib_cm_tx *p = cm_id->context; | |
c1048aff | 972 | struct ipoib_dev_priv *priv = ipoib_priv(p->dev); |
839fcaba MT |
973 | struct ipoib_cm_data *data = event->private_data; |
974 | struct sk_buff_head skqueue; | |
975 | struct ib_qp_attr qp_attr; | |
976 | int qp_attr_mask, ret; | |
977 | struct sk_buff *skb; | |
839fcaba MT |
978 | |
979 | p->mtu = be32_to_cpu(data->mtu); | |
980 | ||
82c3aca6 MT |
981 | if (p->mtu <= IPOIB_ENCAP_LEN) { |
982 | ipoib_warn(priv, "Rejecting connection: mtu %d <= %d\n", | |
983 | p->mtu, IPOIB_ENCAP_LEN); | |
839fcaba MT |
984 | return -EINVAL; |
985 | } | |
986 | ||
987 | qp_attr.qp_state = IB_QPS_RTR; | |
988 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
989 | if (ret) { | |
990 | ipoib_warn(priv, "failed to init QP attr for RTR: %d\n", ret); | |
991 | return ret; | |
992 | } | |
993 | ||
994 | qp_attr.rq_psn = 0 /* FIXME */; | |
995 | ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); | |
996 | if (ret) { | |
997 | ipoib_warn(priv, "failed to modify QP to RTR: %d\n", ret); | |
998 | return ret; | |
999 | } | |
1000 | ||
1001 | qp_attr.qp_state = IB_QPS_RTS; | |
1002 | ret = ib_cm_init_qp_attr(cm_id, &qp_attr, &qp_attr_mask); | |
1003 | if (ret) { | |
1004 | ipoib_warn(priv, "failed to init QP attr for RTS: %d\n", ret); | |
1005 | return ret; | |
1006 | } | |
1007 | ret = ib_modify_qp(p->qp, &qp_attr, qp_attr_mask); | |
1008 | if (ret) { | |
1009 | ipoib_warn(priv, "failed to modify QP to RTS: %d\n", ret); | |
1010 | return ret; | |
1011 | } | |
1012 | ||
1013 | skb_queue_head_init(&skqueue); | |
1014 | ||
37aebbde | 1015 | spin_lock_irq(&priv->lock); |
839fcaba MT |
1016 | set_bit(IPOIB_FLAG_OPER_UP, &p->flags); |
1017 | if (p->neigh) | |
1018 | while ((skb = __skb_dequeue(&p->neigh->queue))) | |
1019 | __skb_queue_tail(&skqueue, skb); | |
37aebbde | 1020 | spin_unlock_irq(&priv->lock); |
839fcaba MT |
1021 | |
1022 | while ((skb = __skb_dequeue(&skqueue))) { | |
1023 | skb->dev = p->dev; | |
d32b9a81 FD |
1024 | ret = dev_queue_xmit(skb); |
1025 | if (ret) | |
1026 | ipoib_warn(priv, "%s:dev_queue_xmit failed to re-queue packet, ret:%d\n", | |
1027 | __func__, ret); | |
839fcaba MT |
1028 | } |
1029 | ||
1030 | ret = ib_send_cm_rtu(cm_id, NULL, 0); | |
1031 | if (ret) { | |
1032 | ipoib_warn(priv, "failed to send RTU: %d\n", ret); | |
1033 | return ret; | |
1034 | } | |
1035 | return 0; | |
1036 | } | |
1037 | ||
1b524963 | 1038 | static struct ib_qp *ipoib_cm_create_tx_qp(struct net_device *dev, struct ipoib_cm_tx *tx) |
839fcaba | 1039 | { |
c1048aff | 1040 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
ede6bc04 | 1041 | struct ib_qp_init_attr attr = { |
f56bcd80 EC |
1042 | .send_cq = priv->recv_cq, |
1043 | .recv_cq = priv->recv_cq, | |
ede6bc04 DB |
1044 | .srq = priv->cm.srq, |
1045 | .cap.max_send_wr = ipoib_sendq_size, | |
1046 | .cap.max_send_sge = 1, | |
1047 | .sq_sig_type = IB_SIGNAL_ALL_WR, | |
1048 | .qp_type = IB_QPT_RC, | |
09b93088 OG |
1049 | .qp_context = tx, |
1050 | .create_flags = IB_QP_CREATE_USE_GFP_NOIO | |
2337f809 | 1051 | }; |
ede6bc04 | 1052 | |
09b93088 OG |
1053 | struct ib_qp *tx_qp; |
1054 | ||
c4268778 | 1055 | if (dev->features & NETIF_F_SG) |
78a50a5e HWR |
1056 | attr.cap.max_send_sge = |
1057 | min_t(u32, priv->ca->attrs.max_sge, MAX_SKB_FRAGS + 1); | |
c4268778 | 1058 | |
09b93088 OG |
1059 | tx_qp = ib_create_qp(priv->pd, &attr); |
1060 | if (PTR_ERR(tx_qp) == -EINVAL) { | |
09b93088 OG |
1061 | attr.create_flags &= ~IB_QP_CREATE_USE_GFP_NOIO; |
1062 | tx_qp = ib_create_qp(priv->pd, &attr); | |
1063 | } | |
78a50a5e | 1064 | tx->max_send_sge = attr.cap.max_send_sge; |
09b93088 | 1065 | return tx_qp; |
839fcaba MT |
1066 | } |
1067 | ||
1068 | static int ipoib_cm_send_req(struct net_device *dev, | |
1069 | struct ib_cm_id *id, struct ib_qp *qp, | |
1070 | u32 qpn, | |
1071 | struct ib_sa_path_rec *pathrec) | |
1072 | { | |
c1048aff | 1073 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
839fcaba MT |
1074 | struct ipoib_cm_data data = {}; |
1075 | struct ib_cm_req_param req = {}; | |
1076 | ||
1077 | data.qpn = cpu_to_be32(priv->qp->qp_num); | |
1078 | data.mtu = cpu_to_be32(IPOIB_CM_BUF_SIZE); | |
1079 | ||
2337f809 RD |
1080 | req.primary_path = pathrec; |
1081 | req.alternate_path = NULL; | |
1082 | req.service_id = cpu_to_be64(IPOIB_CM_IETF_ID | qpn); | |
1083 | req.qp_num = qp->qp_num; | |
1084 | req.qp_type = qp->qp_type; | |
1085 | req.private_data = &data; | |
1086 | req.private_data_len = sizeof data; | |
1087 | req.flow_control = 0; | |
839fcaba | 1088 | |
2337f809 | 1089 | req.starting_psn = 0; /* FIXME */ |
839fcaba MT |
1090 | |
1091 | /* | |
1092 | * Pick some arbitrary defaults here; we could make these | |
1093 | * module parameters if anyone cared about setting them. | |
1094 | */ | |
2337f809 RD |
1095 | req.responder_resources = 4; |
1096 | req.remote_cm_response_timeout = 20; | |
1097 | req.local_cm_response_timeout = 20; | |
1098 | req.retry_count = 0; /* RFC draft warns against retries */ | |
1099 | req.rnr_retry_count = 0; /* RFC draft warns against retries */ | |
1100 | req.max_cm_retries = 15; | |
68e995a2 | 1101 | req.srq = ipoib_cm_has_srq(dev); |
839fcaba MT |
1102 | return ib_send_cm_req(id, &req); |
1103 | } | |
1104 | ||
1105 | static int ipoib_cm_modify_tx_init(struct net_device *dev, | |
1106 | struct ib_cm_id *cm_id, struct ib_qp *qp) | |
1107 | { | |
c1048aff | 1108 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
839fcaba MT |
1109 | struct ib_qp_attr qp_attr; |
1110 | int qp_attr_mask, ret; | |
9fdd5e5b | 1111 | ret = ib_find_pkey(priv->ca, priv->port, priv->pkey, &qp_attr.pkey_index); |
839fcaba | 1112 | if (ret) { |
9fdd5e5b | 1113 | ipoib_warn(priv, "pkey 0x%x not found: %d\n", priv->pkey, ret); |
839fcaba MT |
1114 | return ret; |
1115 | } | |
1116 | ||
1117 | qp_attr.qp_state = IB_QPS_INIT; | |
1118 | qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE; | |
1119 | qp_attr.port_num = priv->port; | |
1120 | qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | IB_QP_PKEY_INDEX | IB_QP_PORT; | |
1121 | ||
1122 | ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask); | |
1123 | if (ret) { | |
1124 | ipoib_warn(priv, "failed to modify tx QP to INIT: %d\n", ret); | |
1125 | return ret; | |
1126 | } | |
1127 | return 0; | |
1128 | } | |
1129 | ||
1130 | static int ipoib_cm_tx_init(struct ipoib_cm_tx *p, u32 qpn, | |
1131 | struct ib_sa_path_rec *pathrec) | |
1132 | { | |
c1048aff | 1133 | struct ipoib_dev_priv *priv = ipoib_priv(p->dev); |
839fcaba MT |
1134 | int ret; |
1135 | ||
09b93088 OG |
1136 | p->tx_ring = __vmalloc(ipoib_sendq_size * sizeof *p->tx_ring, |
1137 | GFP_NOIO, PAGE_KERNEL); | |
839fcaba | 1138 | if (!p->tx_ring) { |
839fcaba MT |
1139 | ret = -ENOMEM; |
1140 | goto err_tx; | |
1141 | } | |
09b93088 | 1142 | memset(p->tx_ring, 0, ipoib_sendq_size * sizeof *p->tx_ring); |
839fcaba | 1143 | |
1b524963 | 1144 | p->qp = ipoib_cm_create_tx_qp(p->dev, p); |
839fcaba MT |
1145 | if (IS_ERR(p->qp)) { |
1146 | ret = PTR_ERR(p->qp); | |
1147 | ipoib_warn(priv, "failed to allocate tx qp: %d\n", ret); | |
1148 | goto err_qp; | |
1149 | } | |
1150 | ||
1151 | p->id = ib_create_cm_id(priv->ca, ipoib_cm_tx_handler, p); | |
1152 | if (IS_ERR(p->id)) { | |
1153 | ret = PTR_ERR(p->id); | |
1154 | ipoib_warn(priv, "failed to create tx cm id: %d\n", ret); | |
1155 | goto err_id; | |
1156 | } | |
1157 | ||
1158 | ret = ipoib_cm_modify_tx_init(p->dev, p->id, p->qp); | |
1159 | if (ret) { | |
1160 | ipoib_warn(priv, "failed to modify tx qp to rtr: %d\n", ret); | |
23536dfa | 1161 | goto err_modify_send; |
839fcaba MT |
1162 | } |
1163 | ||
1164 | ret = ipoib_cm_send_req(p->dev, p->id, p->qp, qpn, pathrec); | |
1165 | if (ret) { | |
1166 | ipoib_warn(priv, "failed to send cm req: %d\n", ret); | |
23536dfa | 1167 | goto err_modify_send; |
839fcaba MT |
1168 | } |
1169 | ||
5b095d98 | 1170 | ipoib_dbg(priv, "Request connection 0x%x for gid %pI6 qpn 0x%x\n", |
fcace2fe | 1171 | p->qp->qp_num, pathrec->dgid.raw, qpn); |
839fcaba MT |
1172 | |
1173 | return 0; | |
1174 | ||
23536dfa | 1175 | err_modify_send: |
839fcaba MT |
1176 | ib_destroy_cm_id(p->id); |
1177 | err_id: | |
1178 | p->id = NULL; | |
1179 | ib_destroy_qp(p->qp); | |
839fcaba MT |
1180 | err_qp: |
1181 | p->qp = NULL; | |
10313cbb | 1182 | vfree(p->tx_ring); |
839fcaba MT |
1183 | err_tx: |
1184 | return ret; | |
1185 | } | |
1186 | ||
1187 | static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p) | |
1188 | { | |
c1048aff | 1189 | struct ipoib_dev_priv *priv = ipoib_priv(p->dev); |
c4268778 | 1190 | struct ipoib_tx_buf *tx_req; |
1b524963 | 1191 | unsigned long begin; |
839fcaba MT |
1192 | |
1193 | ipoib_dbg(priv, "Destroy active connection 0x%x head 0x%x tail 0x%x\n", | |
1194 | p->qp ? p->qp->qp_num : 0, p->tx_head, p->tx_tail); | |
1195 | ||
1196 | if (p->id) | |
1197 | ib_destroy_cm_id(p->id); | |
1198 | ||
839fcaba | 1199 | if (p->tx_ring) { |
1b524963 MT |
1200 | /* Wait for all sends to complete */ |
1201 | begin = jiffies; | |
839fcaba | 1202 | while ((int) p->tx_tail - (int) p->tx_head < 0) { |
1b524963 MT |
1203 | if (time_after(jiffies, begin + 5 * HZ)) { |
1204 | ipoib_warn(priv, "timing out; %d sends not completed\n", | |
1205 | p->tx_head - p->tx_tail); | |
1206 | goto timeout; | |
1207 | } | |
1208 | ||
1209 | msleep(1); | |
839fcaba | 1210 | } |
1b524963 MT |
1211 | } |
1212 | ||
1213 | timeout: | |
839fcaba | 1214 | |
1b524963 MT |
1215 | while ((int) p->tx_tail - (int) p->tx_head < 0) { |
1216 | tx_req = &p->tx_ring[p->tx_tail & (ipoib_sendq_size - 1)]; | |
c4268778 | 1217 | ipoib_dma_unmap_tx(priv, tx_req); |
1b524963 MT |
1218 | dev_kfree_skb_any(tx_req->skb); |
1219 | ++p->tx_tail; | |
943c246e | 1220 | netif_tx_lock_bh(p->dev); |
1b524963 MT |
1221 | if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) && |
1222 | netif_queue_stopped(p->dev) && | |
1223 | test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
1224 | netif_wake_queue(p->dev); | |
943c246e | 1225 | netif_tx_unlock_bh(p->dev); |
839fcaba MT |
1226 | } |
1227 | ||
1b524963 MT |
1228 | if (p->qp) |
1229 | ib_destroy_qp(p->qp); | |
1230 | ||
10313cbb | 1231 | vfree(p->tx_ring); |
839fcaba MT |
1232 | kfree(p); |
1233 | } | |
1234 | ||
1235 | static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id, | |
1236 | struct ib_cm_event *event) | |
1237 | { | |
1238 | struct ipoib_cm_tx *tx = cm_id->context; | |
c1048aff | 1239 | struct ipoib_dev_priv *priv = ipoib_priv(tx->dev); |
839fcaba MT |
1240 | struct net_device *dev = priv->dev; |
1241 | struct ipoib_neigh *neigh; | |
943c246e | 1242 | unsigned long flags; |
839fcaba MT |
1243 | int ret; |
1244 | ||
1245 | switch (event->event) { | |
1246 | case IB_CM_DREQ_RECEIVED: | |
1247 | ipoib_dbg(priv, "DREQ received.\n"); | |
1248 | ib_send_cm_drep(cm_id, NULL, 0); | |
1249 | break; | |
1250 | case IB_CM_REP_RECEIVED: | |
1251 | ipoib_dbg(priv, "REP received.\n"); | |
1252 | ret = ipoib_cm_rep_handler(cm_id, event); | |
1253 | if (ret) | |
1254 | ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED, | |
1255 | NULL, 0, NULL, 0); | |
1256 | break; | |
1257 | case IB_CM_REQ_ERROR: | |
1258 | case IB_CM_REJ_RECEIVED: | |
1259 | case IB_CM_TIMEWAIT_EXIT: | |
1260 | ipoib_dbg(priv, "CM error %d.\n", event->event); | |
943c246e RD |
1261 | netif_tx_lock_bh(dev); |
1262 | spin_lock_irqsave(&priv->lock, flags); | |
839fcaba MT |
1263 | neigh = tx->neigh; |
1264 | ||
1265 | if (neigh) { | |
1266 | neigh->cm = NULL; | |
b63b70d8 | 1267 | ipoib_neigh_free(neigh); |
839fcaba MT |
1268 | |
1269 | tx->neigh = NULL; | |
1270 | } | |
1271 | ||
1272 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { | |
1273 | list_move(&tx->list, &priv->cm.reap_list); | |
0b39578b | 1274 | queue_work(priv->wq, &priv->cm.reap_task); |
839fcaba MT |
1275 | } |
1276 | ||
943c246e RD |
1277 | spin_unlock_irqrestore(&priv->lock, flags); |
1278 | netif_tx_unlock_bh(dev); | |
839fcaba MT |
1279 | break; |
1280 | default: | |
1281 | break; | |
1282 | } | |
1283 | ||
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path, | |
1288 | struct ipoib_neigh *neigh) | |
1289 | { | |
c1048aff | 1290 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
839fcaba MT |
1291 | struct ipoib_cm_tx *tx; |
1292 | ||
1293 | tx = kzalloc(sizeof *tx, GFP_ATOMIC); | |
1294 | if (!tx) | |
1295 | return NULL; | |
1296 | ||
1297 | neigh->cm = tx; | |
1298 | tx->neigh = neigh; | |
1299 | tx->path = path; | |
1300 | tx->dev = dev; | |
1301 | list_add(&tx->list, &priv->cm.start_list); | |
1302 | set_bit(IPOIB_FLAG_INITIALIZED, &tx->flags); | |
0b39578b | 1303 | queue_work(priv->wq, &priv->cm.start_task); |
839fcaba MT |
1304 | return tx; |
1305 | } | |
1306 | ||
1307 | void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx) | |
1308 | { | |
c1048aff | 1309 | struct ipoib_dev_priv *priv = ipoib_priv(tx->dev); |
fa16ebed | 1310 | unsigned long flags; |
839fcaba | 1311 | if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &tx->flags)) { |
fa16ebed | 1312 | spin_lock_irqsave(&priv->lock, flags); |
839fcaba | 1313 | list_move(&tx->list, &priv->cm.reap_list); |
0b39578b | 1314 | queue_work(priv->wq, &priv->cm.reap_task); |
5b095d98 | 1315 | ipoib_dbg(priv, "Reap connection for gid %pI6\n", |
b63b70d8 | 1316 | tx->neigh->daddr + 4); |
839fcaba | 1317 | tx->neigh = NULL; |
fa16ebed | 1318 | spin_unlock_irqrestore(&priv->lock, flags); |
839fcaba MT |
1319 | } |
1320 | } | |
1321 | ||
546481c2 ES |
1322 | #define QPN_AND_OPTIONS_OFFSET 4 |
1323 | ||
839fcaba MT |
1324 | static void ipoib_cm_tx_start(struct work_struct *work) |
1325 | { | |
1326 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
1327 | cm.start_task); | |
1328 | struct net_device *dev = priv->dev; | |
1329 | struct ipoib_neigh *neigh; | |
1330 | struct ipoib_cm_tx *p; | |
1331 | unsigned long flags; | |
546481c2 | 1332 | struct ipoib_path *path; |
839fcaba MT |
1333 | int ret; |
1334 | ||
1335 | struct ib_sa_path_rec pathrec; | |
1336 | u32 qpn; | |
1337 | ||
943c246e RD |
1338 | netif_tx_lock_bh(dev); |
1339 | spin_lock_irqsave(&priv->lock, flags); | |
1340 | ||
839fcaba MT |
1341 | while (!list_empty(&priv->cm.start_list)) { |
1342 | p = list_entry(priv->cm.start_list.next, typeof(*p), list); | |
1343 | list_del_init(&p->list); | |
1344 | neigh = p->neigh; | |
546481c2 | 1345 | |
b63b70d8 | 1346 | qpn = IPOIB_QPN(neigh->daddr); |
546481c2 ES |
1347 | /* |
1348 | * As long as the search is with these 2 locks, | |
1349 | * path existence indicates its validity. | |
1350 | */ | |
1351 | path = __path_find(dev, neigh->daddr + QPN_AND_OPTIONS_OFFSET); | |
1352 | if (!path) { | |
1353 | pr_info("%s ignore not valid path %pI6\n", | |
1354 | __func__, | |
1355 | neigh->daddr + QPN_AND_OPTIONS_OFFSET); | |
1356 | goto free_neigh; | |
1357 | } | |
839fcaba | 1358 | memcpy(&pathrec, &p->path->pathrec, sizeof pathrec); |
943c246e RD |
1359 | |
1360 | spin_unlock_irqrestore(&priv->lock, flags); | |
1361 | netif_tx_unlock_bh(dev); | |
1362 | ||
839fcaba | 1363 | ret = ipoib_cm_tx_init(p, qpn, &pathrec); |
943c246e RD |
1364 | |
1365 | netif_tx_lock_bh(dev); | |
1366 | spin_lock_irqsave(&priv->lock, flags); | |
1367 | ||
839fcaba | 1368 | if (ret) { |
546481c2 | 1369 | free_neigh: |
839fcaba MT |
1370 | neigh = p->neigh; |
1371 | if (neigh) { | |
1372 | neigh->cm = NULL; | |
b63b70d8 | 1373 | ipoib_neigh_free(neigh); |
839fcaba MT |
1374 | } |
1375 | list_del(&p->list); | |
1376 | kfree(p); | |
1377 | } | |
1378 | } | |
943c246e RD |
1379 | |
1380 | spin_unlock_irqrestore(&priv->lock, flags); | |
1381 | netif_tx_unlock_bh(dev); | |
839fcaba MT |
1382 | } |
1383 | ||
1384 | static void ipoib_cm_tx_reap(struct work_struct *work) | |
1385 | { | |
1386 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
1387 | cm.reap_task); | |
943c246e | 1388 | struct net_device *dev = priv->dev; |
839fcaba | 1389 | struct ipoib_cm_tx *p; |
943c246e RD |
1390 | unsigned long flags; |
1391 | ||
1392 | netif_tx_lock_bh(dev); | |
1393 | spin_lock_irqsave(&priv->lock, flags); | |
839fcaba | 1394 | |
839fcaba MT |
1395 | while (!list_empty(&priv->cm.reap_list)) { |
1396 | p = list_entry(priv->cm.reap_list.next, typeof(*p), list); | |
27d41d29 | 1397 | list_del_init(&p->list); |
943c246e RD |
1398 | spin_unlock_irqrestore(&priv->lock, flags); |
1399 | netif_tx_unlock_bh(dev); | |
839fcaba | 1400 | ipoib_cm_tx_destroy(p); |
943c246e RD |
1401 | netif_tx_lock_bh(dev); |
1402 | spin_lock_irqsave(&priv->lock, flags); | |
839fcaba | 1403 | } |
943c246e RD |
1404 | |
1405 | spin_unlock_irqrestore(&priv->lock, flags); | |
1406 | netif_tx_unlock_bh(dev); | |
839fcaba MT |
1407 | } |
1408 | ||
1409 | static void ipoib_cm_skb_reap(struct work_struct *work) | |
1410 | { | |
1411 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
1412 | cm.skb_task); | |
943c246e | 1413 | struct net_device *dev = priv->dev; |
839fcaba | 1414 | struct sk_buff *skb; |
943c246e | 1415 | unsigned long flags; |
839fcaba MT |
1416 | unsigned mtu = priv->mcast_mtu; |
1417 | ||
943c246e RD |
1418 | netif_tx_lock_bh(dev); |
1419 | spin_lock_irqsave(&priv->lock, flags); | |
1420 | ||
839fcaba | 1421 | while ((skb = skb_dequeue(&priv->cm.skb_queue))) { |
943c246e RD |
1422 | spin_unlock_irqrestore(&priv->lock, flags); |
1423 | netif_tx_unlock_bh(dev); | |
1424 | ||
839fcaba MT |
1425 | if (skb->protocol == htons(ETH_P_IP)) |
1426 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); | |
d90f9b35 | 1427 | #if IS_ENABLED(CONFIG_IPV6) |
839fcaba | 1428 | else if (skb->protocol == htons(ETH_P_IPV6)) |
3ffe533c | 1429 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); |
839fcaba MT |
1430 | #endif |
1431 | dev_kfree_skb_any(skb); | |
943c246e RD |
1432 | |
1433 | netif_tx_lock_bh(dev); | |
1434 | spin_lock_irqsave(&priv->lock, flags); | |
839fcaba | 1435 | } |
943c246e RD |
1436 | |
1437 | spin_unlock_irqrestore(&priv->lock, flags); | |
1438 | netif_tx_unlock_bh(dev); | |
839fcaba MT |
1439 | } |
1440 | ||
2337f809 | 1441 | void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb, |
839fcaba MT |
1442 | unsigned int mtu) |
1443 | { | |
c1048aff | 1444 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
839fcaba MT |
1445 | int e = skb_queue_empty(&priv->cm.skb_queue); |
1446 | ||
adf30907 | 1447 | if (skb_dst(skb)) |
6700c270 | 1448 | skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu); |
839fcaba MT |
1449 | |
1450 | skb_queue_tail(&priv->cm.skb_queue, skb); | |
1451 | if (e) | |
0b39578b | 1452 | queue_work(priv->wq, &priv->cm.skb_task); |
839fcaba MT |
1453 | } |
1454 | ||
518b1646 MT |
1455 | static void ipoib_cm_rx_reap(struct work_struct *work) |
1456 | { | |
efcd9971 RD |
1457 | ipoib_cm_free_rx_reap_list(container_of(work, struct ipoib_dev_priv, |
1458 | cm.rx_reap_task)->dev); | |
518b1646 MT |
1459 | } |
1460 | ||
839fcaba MT |
1461 | static void ipoib_cm_stale_task(struct work_struct *work) |
1462 | { | |
1463 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
1464 | cm.stale_task.work); | |
1465 | struct ipoib_cm_rx *p; | |
518b1646 | 1466 | int ret; |
839fcaba | 1467 | |
37aebbde | 1468 | spin_lock_irq(&priv->lock); |
839fcaba | 1469 | while (!list_empty(&priv->cm.passive_ids)) { |
518b1646 | 1470 | /* List is sorted by LRU, start from tail, |
839fcaba MT |
1471 | * stop when we see a recently used entry */ |
1472 | p = list_entry(priv->cm.passive_ids.prev, typeof(*p), list); | |
60a596da | 1473 | if (time_before_eq(jiffies, p->jiffies + IPOIB_CM_RX_TIMEOUT)) |
839fcaba | 1474 | break; |
518b1646 MT |
1475 | list_move(&p->list, &priv->cm.rx_error_list); |
1476 | p->state = IPOIB_CM_RX_ERROR; | |
37aebbde | 1477 | spin_unlock_irq(&priv->lock); |
518b1646 MT |
1478 | ret = ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE); |
1479 | if (ret) | |
1480 | ipoib_warn(priv, "unable to move qp to error state: %d\n", ret); | |
37aebbde | 1481 | spin_lock_irq(&priv->lock); |
839fcaba | 1482 | } |
7c5b9ef8 MT |
1483 | |
1484 | if (!list_empty(&priv->cm.passive_ids)) | |
0b39578b | 1485 | queue_delayed_work(priv->wq, |
7c5b9ef8 | 1486 | &priv->cm.stale_task, IPOIB_CM_RX_DELAY); |
37aebbde | 1487 | spin_unlock_irq(&priv->lock); |
839fcaba MT |
1488 | } |
1489 | ||
2337f809 | 1490 | static ssize_t show_mode(struct device *d, struct device_attribute *attr, |
839fcaba MT |
1491 | char *buf) |
1492 | { | |
c1048aff ES |
1493 | struct net_device *dev = to_net_dev(d); |
1494 | struct ipoib_dev_priv *priv = ipoib_priv(dev); | |
839fcaba MT |
1495 | |
1496 | if (test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags)) | |
1497 | return sprintf(buf, "connected\n"); | |
1498 | else | |
1499 | return sprintf(buf, "datagram\n"); | |
1500 | } | |
1501 | ||
862096a8 OG |
1502 | static ssize_t set_mode(struct device *d, struct device_attribute *attr, |
1503 | const char *buf, size_t count) | |
1504 | { | |
1505 | struct net_device *dev = to_net_dev(d); | |
1506 | int ret; | |
c1048aff | 1507 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
198b12f7 ES |
1508 | |
1509 | if (test_bit(IPOIB_FLAG_GOING_DOWN, &priv->flags)) | |
1510 | return -EPERM; | |
862096a8 OG |
1511 | |
1512 | if (!rtnl_trylock()) | |
1513 | return restart_syscall(); | |
1514 | ||
1515 | ret = ipoib_set_mode(dev, buf); | |
1516 | ||
0a0007f2 FD |
1517 | /* The assumption is that the function ipoib_set_mode returned |
1518 | * with the rtnl held by it, if not the value -EBUSY returned, | |
1519 | * then no need to rtnl_unlock | |
1520 | */ | |
1521 | if (ret != -EBUSY) | |
1522 | rtnl_unlock(); | |
862096a8 | 1523 | |
0a0007f2 | 1524 | return (!ret || ret == -EBUSY) ? count : ret; |
862096a8 OG |
1525 | } |
1526 | ||
551fd612 | 1527 | static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO, show_mode, set_mode); |
839fcaba MT |
1528 | |
1529 | int ipoib_cm_add_mode_attr(struct net_device *dev) | |
1530 | { | |
1531 | return device_create_file(&dev->dev, &dev_attr_mode); | |
1532 | } | |
1533 | ||
586a6934 | 1534 | static void ipoib_cm_create_srq(struct net_device *dev, int max_sge) |
839fcaba | 1535 | { |
c1048aff | 1536 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
839fcaba | 1537 | struct ib_srq_init_attr srq_init_attr = { |
96104eda | 1538 | .srq_type = IB_SRQT_BASIC, |
839fcaba MT |
1539 | .attr = { |
1540 | .max_wr = ipoib_recvq_size, | |
586a6934 | 1541 | .max_sge = max_sge |
839fcaba MT |
1542 | } |
1543 | }; | |
7b3687df RD |
1544 | |
1545 | priv->cm.srq = ib_create_srq(priv->pd, &srq_init_attr); | |
1546 | if (IS_ERR(priv->cm.srq)) { | |
68e995a2 PS |
1547 | if (PTR_ERR(priv->cm.srq) != -ENOSYS) |
1548 | printk(KERN_WARNING "%s: failed to allocate SRQ, error %ld\n", | |
1549 | priv->ca->name, PTR_ERR(priv->cm.srq)); | |
7b3687df | 1550 | priv->cm.srq = NULL; |
68e995a2 | 1551 | return; |
7b3687df RD |
1552 | } |
1553 | ||
948579cd | 1554 | priv->cm.srq_ring = vzalloc(ipoib_recvq_size * sizeof *priv->cm.srq_ring); |
7b3687df | 1555 | if (!priv->cm.srq_ring) { |
7b3687df RD |
1556 | ib_destroy_srq(priv->cm.srq); |
1557 | priv->cm.srq = NULL; | |
b1404069 | 1558 | return; |
7b3687df | 1559 | } |
b1404069 | 1560 | |
7b3687df RD |
1561 | } |
1562 | ||
1563 | int ipoib_cm_dev_init(struct net_device *dev) | |
1564 | { | |
c1048aff | 1565 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
4a061b28 | 1566 | int max_srq_sge, i; |
839fcaba MT |
1567 | |
1568 | INIT_LIST_HEAD(&priv->cm.passive_ids); | |
1569 | INIT_LIST_HEAD(&priv->cm.reap_list); | |
1570 | INIT_LIST_HEAD(&priv->cm.start_list); | |
518b1646 MT |
1571 | INIT_LIST_HEAD(&priv->cm.rx_error_list); |
1572 | INIT_LIST_HEAD(&priv->cm.rx_flush_list); | |
1573 | INIT_LIST_HEAD(&priv->cm.rx_drain_list); | |
1574 | INIT_LIST_HEAD(&priv->cm.rx_reap_list); | |
839fcaba MT |
1575 | INIT_WORK(&priv->cm.start_task, ipoib_cm_tx_start); |
1576 | INIT_WORK(&priv->cm.reap_task, ipoib_cm_tx_reap); | |
1577 | INIT_WORK(&priv->cm.skb_task, ipoib_cm_skb_reap); | |
518b1646 | 1578 | INIT_WORK(&priv->cm.rx_reap_task, ipoib_cm_rx_reap); |
839fcaba MT |
1579 | INIT_DELAYED_WORK(&priv->cm.stale_task, ipoib_cm_stale_task); |
1580 | ||
1581 | skb_queue_head_init(&priv->cm.skb_queue); | |
1582 | ||
4a061b28 | 1583 | ipoib_dbg(priv, "max_srq_sge=%d\n", priv->ca->attrs.max_srq_sge); |
586a6934 | 1584 | |
4a061b28 OG |
1585 | max_srq_sge = min_t(int, IPOIB_CM_RX_SG, priv->ca->attrs.max_srq_sge); |
1586 | ipoib_cm_create_srq(dev, max_srq_sge); | |
586a6934 | 1587 | if (ipoib_cm_has_srq(dev)) { |
4a061b28 OG |
1588 | priv->cm.max_cm_mtu = max_srq_sge * PAGE_SIZE - 0x10; |
1589 | priv->cm.num_frags = max_srq_sge; | |
586a6934 PS |
1590 | ipoib_dbg(priv, "max_cm_mtu = 0x%x, num_frags=%d\n", |
1591 | priv->cm.max_cm_mtu, priv->cm.num_frags); | |
1592 | } else { | |
1593 | priv->cm.max_cm_mtu = IPOIB_CM_MTU; | |
1594 | priv->cm.num_frags = IPOIB_CM_RX_SG; | |
1595 | } | |
1596 | ||
a7d834c4 | 1597 | ipoib_cm_init_rx_wr(dev, &priv->cm.rx_wr, priv->cm.rx_sge); |
68e995a2 PS |
1598 | |
1599 | if (ipoib_cm_has_srq(dev)) { | |
1600 | for (i = 0; i < ipoib_recvq_size; ++i) { | |
1601 | if (!ipoib_cm_alloc_rx_skb(dev, priv->cm.srq_ring, i, | |
586a6934 | 1602 | priv->cm.num_frags - 1, |
22252b4e TA |
1603 | priv->cm.srq_ring[i].mapping, |
1604 | GFP_KERNEL)) { | |
68e995a2 PS |
1605 | ipoib_warn(priv, "failed to allocate " |
1606 | "receive buffer %d\n", i); | |
1607 | ipoib_cm_dev_cleanup(dev); | |
1608 | return -ENOMEM; | |
1609 | } | |
7b3687df | 1610 | |
68e995a2 PS |
1611 | if (ipoib_cm_post_receive_srq(dev, i)) { |
1612 | ipoib_warn(priv, "ipoib_cm_post_receive_srq " | |
1613 | "failed for buf %d\n", i); | |
1614 | ipoib_cm_dev_cleanup(dev); | |
1615 | return -EIO; | |
1616 | } | |
839fcaba MT |
1617 | } |
1618 | } | |
1619 | ||
1620 | priv->dev->dev_addr[0] = IPOIB_FLAGS_RC; | |
1621 | return 0; | |
1622 | } | |
1623 | ||
1624 | void ipoib_cm_dev_cleanup(struct net_device *dev) | |
1625 | { | |
c1048aff | 1626 | struct ipoib_dev_priv *priv = ipoib_priv(dev); |
1efb6144 | 1627 | int ret; |
839fcaba MT |
1628 | |
1629 | if (!priv->cm.srq) | |
1630 | return; | |
1631 | ||
1632 | ipoib_dbg(priv, "Cleanup ipoib connected mode.\n"); | |
1633 | ||
1634 | ret = ib_destroy_srq(priv->cm.srq); | |
1635 | if (ret) | |
1636 | ipoib_warn(priv, "ib_destroy_srq failed: %d\n", ret); | |
1637 | ||
1638 | priv->cm.srq = NULL; | |
1639 | if (!priv->cm.srq_ring) | |
1640 | return; | |
1efb6144 RD |
1641 | |
1642 | ipoib_cm_free_rx_ring(dev, priv->cm.srq_ring); | |
839fcaba MT |
1643 | priv->cm.srq_ring = NULL; |
1644 | } |