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377f9b2f | 1 | /* |
0bf48289 | 2 | * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. |
377f9b2f TT |
3 | * Copyright (c) 2005-2007 Network Appliance, Inc. All rights reserved. |
4 | * | |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the BSD-type | |
9 | * license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * | |
15 | * Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following 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 provided | |
21 | * with the distribution. | |
22 | * | |
23 | * Neither the name of the Network Appliance, Inc. nor the names of | |
24 | * its contributors may be used to endorse or promote products | |
25 | * derived from this software without specific prior written | |
26 | * permission. | |
27 | * | |
28 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
29 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
30 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
31 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
32 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
33 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
34 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
35 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
36 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
37 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
38 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
39 | * | |
40 | * Author: Tom Tucker <tom@opengridcomputing.com> | |
41 | */ | |
42 | ||
43 | #include <linux/sunrpc/svc_xprt.h> | |
07257450 | 44 | #include <linux/sunrpc/addr.h> |
377f9b2f TT |
45 | #include <linux/sunrpc/debug.h> |
46 | #include <linux/sunrpc/rpc_rdma.h> | |
a6b7a407 | 47 | #include <linux/interrupt.h> |
d43c36dc | 48 | #include <linux/sched.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
377f9b2f | 50 | #include <linux/spinlock.h> |
a25e758c | 51 | #include <linux/workqueue.h> |
377f9b2f TT |
52 | #include <rdma/ib_verbs.h> |
53 | #include <rdma/rdma_cm.h> | |
26fb2254 | 54 | #include <rdma/rw.h> |
377f9b2f | 55 | #include <linux/sunrpc/svc_rdma.h> |
bc3b2d7f | 56 | #include <linux/export.h> |
cec56c8f | 57 | #include "xprt_rdma.h" |
377f9b2f TT |
58 | |
59 | #define RPCDBG_FACILITY RPCDBG_SVCXPRT | |
60 | ||
48272502 | 61 | static int svc_rdma_post_recv(struct svcxprt_rdma *xprt); |
94684319 | 62 | static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *, int); |
377f9b2f | 63 | static struct svc_xprt *svc_rdma_create(struct svc_serv *serv, |
62832c03 | 64 | struct net *net, |
377f9b2f TT |
65 | struct sockaddr *sa, int salen, |
66 | int flags); | |
67 | static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt); | |
68 | static void svc_rdma_release_rqst(struct svc_rqst *); | |
377f9b2f TT |
69 | static void svc_rdma_detach(struct svc_xprt *xprt); |
70 | static void svc_rdma_free(struct svc_xprt *xprt); | |
71 | static int svc_rdma_has_wspace(struct svc_xprt *xprt); | |
989f881e | 72 | static void svc_rdma_secure_port(struct svc_rqst *); |
ea08e392 | 73 | static void svc_rdma_kill_temp_xprt(struct svc_xprt *); |
377f9b2f | 74 | |
2412e927 | 75 | static const struct svc_xprt_ops svc_rdma_ops = { |
377f9b2f TT |
76 | .xpo_create = svc_rdma_create, |
77 | .xpo_recvfrom = svc_rdma_recvfrom, | |
78 | .xpo_sendto = svc_rdma_sendto, | |
79 | .xpo_release_rqst = svc_rdma_release_rqst, | |
80 | .xpo_detach = svc_rdma_detach, | |
81 | .xpo_free = svc_rdma_free, | |
82 | .xpo_prep_reply_hdr = svc_rdma_prep_reply_hdr, | |
83 | .xpo_has_wspace = svc_rdma_has_wspace, | |
84 | .xpo_accept = svc_rdma_accept, | |
16e4d93f | 85 | .xpo_secure_port = svc_rdma_secure_port, |
ea08e392 | 86 | .xpo_kill_temp_xprt = svc_rdma_kill_temp_xprt, |
377f9b2f TT |
87 | }; |
88 | ||
89 | struct svc_xprt_class svc_rdma_class = { | |
90 | .xcl_name = "rdma", | |
91 | .xcl_owner = THIS_MODULE, | |
92 | .xcl_ops = &svc_rdma_ops, | |
cc9a903d | 93 | .xcl_max_payload = RPCSVC_MAXPAYLOAD_RDMA, |
3c45ddf8 | 94 | .xcl_ident = XPRT_TRANSPORT_RDMA, |
377f9b2f TT |
95 | }; |
96 | ||
94684319 CL |
97 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
98 | static struct svc_xprt *svc_rdma_bc_create(struct svc_serv *, struct net *, | |
99 | struct sockaddr *, int, int); | |
100 | static void svc_rdma_bc_detach(struct svc_xprt *); | |
101 | static void svc_rdma_bc_free(struct svc_xprt *); | |
102 | ||
2412e927 | 103 | static const struct svc_xprt_ops svc_rdma_bc_ops = { |
94684319 CL |
104 | .xpo_create = svc_rdma_bc_create, |
105 | .xpo_detach = svc_rdma_bc_detach, | |
106 | .xpo_free = svc_rdma_bc_free, | |
107 | .xpo_prep_reply_hdr = svc_rdma_prep_reply_hdr, | |
108 | .xpo_secure_port = svc_rdma_secure_port, | |
109 | }; | |
110 | ||
111 | struct svc_xprt_class svc_rdma_bc_class = { | |
112 | .xcl_name = "rdma-bc", | |
113 | .xcl_owner = THIS_MODULE, | |
114 | .xcl_ops = &svc_rdma_bc_ops, | |
115 | .xcl_max_payload = (1024 - RPCRDMA_HDRLEN_MIN) | |
116 | }; | |
117 | ||
118 | static struct svc_xprt *svc_rdma_bc_create(struct svc_serv *serv, | |
119 | struct net *net, | |
120 | struct sockaddr *sa, int salen, | |
121 | int flags) | |
122 | { | |
123 | struct svcxprt_rdma *cma_xprt; | |
124 | struct svc_xprt *xprt; | |
125 | ||
126 | cma_xprt = rdma_create_xprt(serv, 0); | |
127 | if (!cma_xprt) | |
128 | return ERR_PTR(-ENOMEM); | |
129 | xprt = &cma_xprt->sc_xprt; | |
130 | ||
131 | svc_xprt_init(net, &svc_rdma_bc_class, xprt, serv); | |
23abec20 | 132 | set_bit(XPT_CONG_CTRL, &xprt->xpt_flags); |
94684319 CL |
133 | serv->sv_bc_xprt = xprt; |
134 | ||
135 | dprintk("svcrdma: %s(%p)\n", __func__, xprt); | |
136 | return xprt; | |
137 | } | |
138 | ||
139 | static void svc_rdma_bc_detach(struct svc_xprt *xprt) | |
140 | { | |
141 | dprintk("svcrdma: %s(%p)\n", __func__, xprt); | |
142 | } | |
143 | ||
144 | static void svc_rdma_bc_free(struct svc_xprt *xprt) | |
145 | { | |
146 | struct svcxprt_rdma *rdma = | |
147 | container_of(xprt, struct svcxprt_rdma, sc_xprt); | |
148 | ||
149 | dprintk("svcrdma: %s(%p)\n", __func__, xprt); | |
150 | if (xprt) | |
151 | kfree(rdma); | |
152 | } | |
153 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ | |
154 | ||
cc886c9f CL |
155 | static struct svc_rdma_op_ctxt *alloc_ctxt(struct svcxprt_rdma *xprt, |
156 | gfp_t flags) | |
377f9b2f TT |
157 | { |
158 | struct svc_rdma_op_ctxt *ctxt; | |
159 | ||
cc886c9f CL |
160 | ctxt = kmalloc(sizeof(*ctxt), flags); |
161 | if (ctxt) { | |
162 | ctxt->xprt = xprt; | |
a3ab867f | 163 | INIT_LIST_HEAD(&ctxt->list); |
cc886c9f CL |
164 | } |
165 | return ctxt; | |
166 | } | |
167 | ||
168 | static bool svc_rdma_prealloc_ctxts(struct svcxprt_rdma *xprt) | |
169 | { | |
03fe9931 | 170 | unsigned int i; |
cc886c9f | 171 | |
5a25bfd2 CL |
172 | /* Each RPC/RDMA credit can consume one Receive and |
173 | * one Send WQE at the same time. | |
cc886c9f | 174 | */ |
03fe9931 | 175 | i = xprt->sc_sq_depth + xprt->sc_rq_depth; |
cc886c9f CL |
176 | |
177 | while (i--) { | |
178 | struct svc_rdma_op_ctxt *ctxt; | |
179 | ||
180 | ctxt = alloc_ctxt(xprt, GFP_KERNEL); | |
181 | if (!ctxt) { | |
182 | dprintk("svcrdma: No memory for RDMA ctxt\n"); | |
183 | return false; | |
184 | } | |
a3ab867f | 185 | list_add(&ctxt->list, &xprt->sc_ctxts); |
cc886c9f CL |
186 | } |
187 | return true; | |
188 | } | |
189 | ||
190 | struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *xprt) | |
191 | { | |
192 | struct svc_rdma_op_ctxt *ctxt = NULL; | |
193 | ||
81fa3275 | 194 | spin_lock(&xprt->sc_ctxt_lock); |
cc886c9f CL |
195 | xprt->sc_ctxt_used++; |
196 | if (list_empty(&xprt->sc_ctxts)) | |
197 | goto out_empty; | |
198 | ||
199 | ctxt = list_first_entry(&xprt->sc_ctxts, | |
a3ab867f CL |
200 | struct svc_rdma_op_ctxt, list); |
201 | list_del(&ctxt->list); | |
81fa3275 | 202 | spin_unlock(&xprt->sc_ctxt_lock); |
cc886c9f CL |
203 | |
204 | out: | |
8948896c | 205 | ctxt->count = 0; |
cace564f | 206 | ctxt->mapped_sges = 0; |
377f9b2f | 207 | return ctxt; |
cc886c9f CL |
208 | |
209 | out_empty: | |
210 | /* Either pre-allocation missed the mark, or send | |
211 | * queue accounting is broken. | |
212 | */ | |
81fa3275 | 213 | spin_unlock(&xprt->sc_ctxt_lock); |
cc886c9f CL |
214 | |
215 | ctxt = alloc_ctxt(xprt, GFP_NOIO); | |
216 | if (ctxt) | |
217 | goto out; | |
218 | ||
81fa3275 | 219 | spin_lock(&xprt->sc_ctxt_lock); |
cc886c9f | 220 | xprt->sc_ctxt_used--; |
81fa3275 | 221 | spin_unlock(&xprt->sc_ctxt_lock); |
cc886c9f CL |
222 | WARN_ONCE(1, "svcrdma: empty RDMA ctxt list?\n"); |
223 | return NULL; | |
377f9b2f TT |
224 | } |
225 | ||
146b6df6 | 226 | void svc_rdma_unmap_dma(struct svc_rdma_op_ctxt *ctxt) |
e6ab9143 TT |
227 | { |
228 | struct svcxprt_rdma *xprt = ctxt->xprt; | |
cace564f | 229 | struct ib_device *device = xprt->sc_cm_id->device; |
dd6fd213 | 230 | unsigned int i; |
cace564f | 231 | |
0d956e69 CL |
232 | for (i = 0; i < ctxt->mapped_sges; i++) |
233 | ib_dma_unmap_page(device, | |
234 | ctxt->sge[i].addr, | |
235 | ctxt->sge[i].length, | |
236 | ctxt->direction); | |
cace564f | 237 | ctxt->mapped_sges = 0; |
e6ab9143 TT |
238 | } |
239 | ||
377f9b2f TT |
240 | void svc_rdma_put_context(struct svc_rdma_op_ctxt *ctxt, int free_pages) |
241 | { | |
cc886c9f | 242 | struct svcxprt_rdma *xprt = ctxt->xprt; |
377f9b2f TT |
243 | int i; |
244 | ||
377f9b2f TT |
245 | if (free_pages) |
246 | for (i = 0; i < ctxt->count; i++) | |
247 | put_page(ctxt->pages[i]); | |
248 | ||
81fa3275 | 249 | spin_lock(&xprt->sc_ctxt_lock); |
cc886c9f | 250 | xprt->sc_ctxt_used--; |
a3ab867f | 251 | list_add(&ctxt->list, &xprt->sc_ctxts); |
81fa3275 | 252 | spin_unlock(&xprt->sc_ctxt_lock); |
cc886c9f CL |
253 | } |
254 | ||
255 | static void svc_rdma_destroy_ctxts(struct svcxprt_rdma *xprt) | |
256 | { | |
257 | while (!list_empty(&xprt->sc_ctxts)) { | |
258 | struct svc_rdma_op_ctxt *ctxt; | |
259 | ||
260 | ctxt = list_first_entry(&xprt->sc_ctxts, | |
a3ab867f CL |
261 | struct svc_rdma_op_ctxt, list); |
262 | list_del(&ctxt->list); | |
cc886c9f CL |
263 | kfree(ctxt); |
264 | } | |
377f9b2f TT |
265 | } |
266 | ||
377f9b2f TT |
267 | /* QP event handler */ |
268 | static void qp_event_handler(struct ib_event *event, void *context) | |
269 | { | |
270 | struct svc_xprt *xprt = context; | |
271 | ||
272 | switch (event->event) { | |
273 | /* These are considered benign events */ | |
274 | case IB_EVENT_PATH_MIG: | |
275 | case IB_EVENT_COMM_EST: | |
276 | case IB_EVENT_SQ_DRAINED: | |
277 | case IB_EVENT_QP_LAST_WQE_REACHED: | |
76357c71 SG |
278 | dprintk("svcrdma: QP event %s (%d) received for QP=%p\n", |
279 | ib_event_msg(event->event), event->event, | |
280 | event->element.qp); | |
377f9b2f TT |
281 | break; |
282 | /* These are considered fatal events */ | |
283 | case IB_EVENT_PATH_MIG_ERR: | |
284 | case IB_EVENT_QP_FATAL: | |
285 | case IB_EVENT_QP_REQ_ERR: | |
286 | case IB_EVENT_QP_ACCESS_ERR: | |
287 | case IB_EVENT_DEVICE_FATAL: | |
288 | default: | |
76357c71 | 289 | dprintk("svcrdma: QP ERROR event %s (%d) received for QP=%p, " |
377f9b2f | 290 | "closing transport\n", |
76357c71 SG |
291 | ib_event_msg(event->event), event->event, |
292 | event->element.qp); | |
377f9b2f | 293 | set_bit(XPT_CLOSE, &xprt->xpt_flags); |
77a08867 | 294 | svc_xprt_enqueue(xprt); |
377f9b2f TT |
295 | break; |
296 | } | |
297 | } | |
298 | ||
8bd5ba86 CL |
299 | /** |
300 | * svc_rdma_wc_receive - Invoked by RDMA provider for each polled Receive WC | |
301 | * @cq: completion queue | |
302 | * @wc: completed WR | |
377f9b2f | 303 | * |
377f9b2f | 304 | */ |
8bd5ba86 | 305 | static void svc_rdma_wc_receive(struct ib_cq *cq, struct ib_wc *wc) |
377f9b2f | 306 | { |
8bd5ba86 CL |
307 | struct svcxprt_rdma *xprt = cq->cq_context; |
308 | struct ib_cqe *cqe = wc->wr_cqe; | |
309 | struct svc_rdma_op_ctxt *ctxt; | |
377f9b2f | 310 | |
8bd5ba86 CL |
311 | /* WARNING: Only wc->wr_cqe and wc->status are reliable */ |
312 | ctxt = container_of(cqe, struct svc_rdma_op_ctxt, cqe); | |
8bd5ba86 | 313 | svc_rdma_unmap_dma(ctxt); |
dbcd00eb | 314 | |
8bd5ba86 CL |
315 | if (wc->status != IB_WC_SUCCESS) |
316 | goto flushed; | |
377f9b2f | 317 | |
8bd5ba86 CL |
318 | /* All wc fields are now known to be valid */ |
319 | ctxt->byte_len = wc->byte_len; | |
320 | spin_lock(&xprt->sc_rq_dto_lock); | |
a3ab867f | 321 | list_add_tail(&ctxt->list, &xprt->sc_rq_dto_q); |
8bd5ba86 | 322 | spin_unlock(&xprt->sc_rq_dto_lock); |
dbcd00eb | 323 | |
48272502 CL |
324 | svc_rdma_post_recv(xprt); |
325 | ||
dbcd00eb | 326 | set_bit(XPT_DATA, &xprt->sc_xprt.xpt_flags); |
8bd5ba86 CL |
327 | if (test_bit(RDMAXPRT_CONN_PENDING, &xprt->sc_flags)) |
328 | goto out; | |
77a08867 | 329 | goto out_enqueue; |
8bd5ba86 CL |
330 | |
331 | flushed: | |
332 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
0c4398ff CL |
333 | pr_err("svcrdma: Recv: %s (%u/0x%x)\n", |
334 | ib_wc_status_msg(wc->status), | |
335 | wc->status, wc->vendor_err); | |
8bd5ba86 CL |
336 | set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); |
337 | svc_rdma_put_context(ctxt, 1); | |
338 | ||
77a08867 CL |
339 | out_enqueue: |
340 | svc_xprt_enqueue(&xprt->sc_xprt); | |
8bd5ba86 CL |
341 | out: |
342 | svc_xprt_put(&xprt->sc_xprt); | |
377f9b2f TT |
343 | } |
344 | ||
be99bb11 CL |
345 | /** |
346 | * svc_rdma_wc_send - Invoked by RDMA provider for each polled Send WC | |
347 | * @cq: completion queue | |
348 | * @wc: completed WR | |
349 | * | |
350 | */ | |
351 | void svc_rdma_wc_send(struct ib_cq *cq, struct ib_wc *wc) | |
be99bb11 CL |
352 | { |
353 | struct svcxprt_rdma *xprt = cq->cq_context; | |
354 | struct ib_cqe *cqe = wc->wr_cqe; | |
355 | struct svc_rdma_op_ctxt *ctxt; | |
377f9b2f | 356 | |
c84dc900 CL |
357 | atomic_inc(&xprt->sc_sq_avail); |
358 | wake_up(&xprt->sc_send_wait); | |
377f9b2f | 359 | |
be99bb11 CL |
360 | ctxt = container_of(cqe, struct svc_rdma_op_ctxt, cqe); |
361 | svc_rdma_unmap_dma(ctxt); | |
c84dc900 | 362 | svc_rdma_put_context(ctxt, 1); |
be99bb11 | 363 | |
c84dc900 CL |
364 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
365 | set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); | |
77a08867 | 366 | svc_xprt_enqueue(&xprt->sc_xprt); |
c84dc900 CL |
367 | if (wc->status != IB_WC_WR_FLUSH_ERR) |
368 | pr_err("svcrdma: Send: %s (%u/0x%x)\n", | |
369 | ib_wc_status_msg(wc->status), | |
370 | wc->status, wc->vendor_err); | |
377f9b2f TT |
371 | } |
372 | ||
be99bb11 | 373 | svc_xprt_put(&xprt->sc_xprt); |
377f9b2f TT |
374 | } |
375 | ||
377f9b2f TT |
376 | static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *serv, |
377 | int listener) | |
378 | { | |
379 | struct svcxprt_rdma *cma_xprt = kzalloc(sizeof *cma_xprt, GFP_KERNEL); | |
380 | ||
381 | if (!cma_xprt) | |
382 | return NULL; | |
bd4620dd | 383 | svc_xprt_init(&init_net, &svc_rdma_class, &cma_xprt->sc_xprt, serv); |
377f9b2f | 384 | INIT_LIST_HEAD(&cma_xprt->sc_accept_q); |
377f9b2f TT |
385 | INIT_LIST_HEAD(&cma_xprt->sc_rq_dto_q); |
386 | INIT_LIST_HEAD(&cma_xprt->sc_read_complete_q); | |
cc886c9f | 387 | INIT_LIST_HEAD(&cma_xprt->sc_ctxts); |
f13193f5 | 388 | INIT_LIST_HEAD(&cma_xprt->sc_rw_ctxts); |
377f9b2f TT |
389 | init_waitqueue_head(&cma_xprt->sc_send_wait); |
390 | ||
391 | spin_lock_init(&cma_xprt->sc_lock); | |
377f9b2f | 392 | spin_lock_init(&cma_xprt->sc_rq_dto_lock); |
cc886c9f | 393 | spin_lock_init(&cma_xprt->sc_ctxt_lock); |
f13193f5 | 394 | spin_lock_init(&cma_xprt->sc_rw_ctxt_lock); |
377f9b2f | 395 | |
362142b2 JL |
396 | /* |
397 | * Note that this implies that the underlying transport support | |
398 | * has some form of congestion control (see RFC 7530 section 3.1 | |
399 | * paragraph 2). For now, we assume that all supported RDMA | |
400 | * transports are suitable here. | |
401 | */ | |
402 | set_bit(XPT_CONG_CTRL, &cma_xprt->sc_xprt.xpt_flags); | |
403 | ||
ece200dd CL |
404 | if (listener) { |
405 | strcpy(cma_xprt->sc_xprt.xpt_remotebuf, "listener"); | |
377f9b2f | 406 | set_bit(XPT_LISTENER, &cma_xprt->sc_xprt.xpt_flags); |
ece200dd | 407 | } |
377f9b2f TT |
408 | |
409 | return cma_xprt; | |
410 | } | |
411 | ||
48272502 CL |
412 | static int |
413 | svc_rdma_post_recv(struct svcxprt_rdma *xprt) | |
377f9b2f TT |
414 | { |
415 | struct ib_recv_wr recv_wr, *bad_recv_wr; | |
416 | struct svc_rdma_op_ctxt *ctxt; | |
417 | struct page *page; | |
a5abf4e8 | 418 | dma_addr_t pa; |
377f9b2f TT |
419 | int sge_no; |
420 | int buflen; | |
421 | int ret; | |
422 | ||
423 | ctxt = svc_rdma_get_context(xprt); | |
424 | buflen = 0; | |
425 | ctxt->direction = DMA_FROM_DEVICE; | |
8bd5ba86 | 426 | ctxt->cqe.done = svc_rdma_wc_receive; |
377f9b2f | 427 | for (sge_no = 0; buflen < xprt->sc_max_req_size; sge_no++) { |
3fe04ee9 CL |
428 | if (sge_no >= xprt->sc_max_sge) { |
429 | pr_err("svcrdma: Too many sges (%d)\n", sge_no); | |
430 | goto err_put_ctxt; | |
431 | } | |
48272502 | 432 | page = alloc_page(GFP_KERNEL); |
39b09a1a CL |
433 | if (!page) |
434 | goto err_put_ctxt; | |
377f9b2f | 435 | ctxt->pages[sge_no] = page; |
b432e6b3 TT |
436 | pa = ib_dma_map_page(xprt->sc_cm_id->device, |
437 | page, 0, PAGE_SIZE, | |
377f9b2f | 438 | DMA_FROM_DEVICE); |
a5abf4e8 TT |
439 | if (ib_dma_mapping_error(xprt->sc_cm_id->device, pa)) |
440 | goto err_put_ctxt; | |
cace564f | 441 | svc_rdma_count_mappings(xprt, ctxt); |
377f9b2f TT |
442 | ctxt->sge[sge_no].addr = pa; |
443 | ctxt->sge[sge_no].length = PAGE_SIZE; | |
5fe1043d | 444 | ctxt->sge[sge_no].lkey = xprt->sc_pd->local_dma_lkey; |
4a84386f | 445 | ctxt->count = sge_no + 1; |
377f9b2f TT |
446 | buflen += PAGE_SIZE; |
447 | } | |
377f9b2f TT |
448 | recv_wr.next = NULL; |
449 | recv_wr.sg_list = &ctxt->sge[0]; | |
450 | recv_wr.num_sge = ctxt->count; | |
8bd5ba86 | 451 | recv_wr.wr_cqe = &ctxt->cqe; |
377f9b2f | 452 | |
0905c0f0 | 453 | svc_xprt_get(&xprt->sc_xprt); |
377f9b2f | 454 | ret = ib_post_recv(xprt->sc_qp, &recv_wr, &bad_recv_wr); |
0905c0f0 | 455 | if (ret) { |
21515e46 | 456 | svc_rdma_unmap_dma(ctxt); |
05a0826a | 457 | svc_rdma_put_context(ctxt, 1); |
21515e46 | 458 | svc_xprt_put(&xprt->sc_xprt); |
0905c0f0 | 459 | } |
377f9b2f | 460 | return ret; |
a5abf4e8 TT |
461 | |
462 | err_put_ctxt: | |
4a84386f | 463 | svc_rdma_unmap_dma(ctxt); |
a5abf4e8 TT |
464 | svc_rdma_put_context(ctxt, 1); |
465 | return -ENOMEM; | |
377f9b2f TT |
466 | } |
467 | ||
cc9d8340 CL |
468 | static void |
469 | svc_rdma_parse_connect_private(struct svcxprt_rdma *newxprt, | |
470 | struct rdma_conn_param *param) | |
471 | { | |
472 | const struct rpcrdma_connect_private *pmsg = param->private_data; | |
473 | ||
474 | if (pmsg && | |
475 | pmsg->cp_magic == rpcrdma_cmp_magic && | |
476 | pmsg->cp_version == RPCRDMA_CMP_VERSION) { | |
25d55296 CL |
477 | newxprt->sc_snd_w_inv = pmsg->cp_flags & |
478 | RPCRDMA_CMP_F_SND_W_INV_OK; | |
479 | ||
480 | dprintk("svcrdma: client send_size %u, recv_size %u " | |
481 | "remote inv %ssupported\n", | |
cc9d8340 | 482 | rpcrdma_decode_buffer_size(pmsg->cp_send_size), |
25d55296 CL |
483 | rpcrdma_decode_buffer_size(pmsg->cp_recv_size), |
484 | newxprt->sc_snd_w_inv ? "" : "un"); | |
cc9d8340 CL |
485 | } |
486 | } | |
487 | ||
377f9b2f TT |
488 | /* |
489 | * This function handles the CONNECT_REQUEST event on a listening | |
490 | * endpoint. It is passed the cma_id for the _new_ connection. The context in | |
491 | * this cma_id is inherited from the listening cma_id and is the svc_xprt | |
492 | * structure for the listening endpoint. | |
493 | * | |
494 | * This function creates a new xprt for the new connection and enqueues it on | |
495 | * the accept queue for the listent xprt. When the listen thread is kicked, it | |
496 | * will call the recvfrom method on the listen xprt which will accept the new | |
497 | * connection. | |
498 | */ | |
cc9d8340 CL |
499 | static void handle_connect_req(struct rdma_cm_id *new_cma_id, |
500 | struct rdma_conn_param *param) | |
377f9b2f TT |
501 | { |
502 | struct svcxprt_rdma *listen_xprt = new_cma_id->context; | |
503 | struct svcxprt_rdma *newxprt; | |
af261af4 | 504 | struct sockaddr *sa; |
377f9b2f TT |
505 | |
506 | /* Create a new transport */ | |
507 | newxprt = rdma_create_xprt(listen_xprt->sc_xprt.xpt_server, 0); | |
508 | if (!newxprt) { | |
509 | dprintk("svcrdma: failed to create new transport\n"); | |
510 | return; | |
511 | } | |
512 | newxprt->sc_cm_id = new_cma_id; | |
513 | new_cma_id->context = newxprt; | |
514 | dprintk("svcrdma: Creating newxprt=%p, cm_id=%p, listenxprt=%p\n", | |
515 | newxprt, newxprt->sc_cm_id, listen_xprt); | |
cc9d8340 | 516 | svc_rdma_parse_connect_private(newxprt, param); |
377f9b2f | 517 | |
36ef25e4 | 518 | /* Save client advertised inbound read limit for use later in accept. */ |
cc9d8340 | 519 | newxprt->sc_ord = param->initiator_depth; |
36ef25e4 | 520 | |
af261af4 TT |
521 | /* Set the local and remote addresses in the transport */ |
522 | sa = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.dst_addr; | |
523 | svc_xprt_set_remote(&newxprt->sc_xprt, sa, svc_addr_len(sa)); | |
524 | sa = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.src_addr; | |
525 | svc_xprt_set_local(&newxprt->sc_xprt, sa, svc_addr_len(sa)); | |
526 | ||
377f9b2f TT |
527 | /* |
528 | * Enqueue the new transport on the accept queue of the listening | |
529 | * transport | |
530 | */ | |
531 | spin_lock_bh(&listen_xprt->sc_lock); | |
532 | list_add_tail(&newxprt->sc_accept_q, &listen_xprt->sc_accept_q); | |
533 | spin_unlock_bh(&listen_xprt->sc_lock); | |
534 | ||
377f9b2f TT |
535 | set_bit(XPT_CONN, &listen_xprt->sc_xprt.xpt_flags); |
536 | svc_xprt_enqueue(&listen_xprt->sc_xprt); | |
537 | } | |
538 | ||
539 | /* | |
540 | * Handles events generated on the listening endpoint. These events will be | |
541 | * either be incoming connect requests or adapter removal events. | |
542 | */ | |
543 | static int rdma_listen_handler(struct rdma_cm_id *cma_id, | |
544 | struct rdma_cm_event *event) | |
545 | { | |
546 | struct svcxprt_rdma *xprt = cma_id->context; | |
547 | int ret = 0; | |
548 | ||
549 | switch (event->event) { | |
550 | case RDMA_CM_EVENT_CONNECT_REQUEST: | |
551 | dprintk("svcrdma: Connect request on cma_id=%p, xprt = %p, " | |
76357c71 SG |
552 | "event = %s (%d)\n", cma_id, cma_id->context, |
553 | rdma_event_msg(event->event), event->event); | |
cc9d8340 | 554 | handle_connect_req(cma_id, &event->param.conn); |
377f9b2f TT |
555 | break; |
556 | ||
557 | case RDMA_CM_EVENT_ESTABLISHED: | |
558 | /* Accept complete */ | |
559 | dprintk("svcrdma: Connection completed on LISTEN xprt=%p, " | |
560 | "cm_id=%p\n", xprt, cma_id); | |
561 | break; | |
562 | ||
563 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
564 | dprintk("svcrdma: Device removal xprt=%p, cm_id=%p\n", | |
565 | xprt, cma_id); | |
77a08867 | 566 | if (xprt) { |
377f9b2f | 567 | set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); |
77a08867 CL |
568 | svc_xprt_enqueue(&xprt->sc_xprt); |
569 | } | |
377f9b2f TT |
570 | break; |
571 | ||
572 | default: | |
573 | dprintk("svcrdma: Unexpected event on listening endpoint %p, " | |
76357c71 SG |
574 | "event = %s (%d)\n", cma_id, |
575 | rdma_event_msg(event->event), event->event); | |
377f9b2f TT |
576 | break; |
577 | } | |
578 | ||
579 | return ret; | |
580 | } | |
581 | ||
582 | static int rdma_cma_handler(struct rdma_cm_id *cma_id, | |
583 | struct rdma_cm_event *event) | |
584 | { | |
585 | struct svc_xprt *xprt = cma_id->context; | |
586 | struct svcxprt_rdma *rdma = | |
587 | container_of(xprt, struct svcxprt_rdma, sc_xprt); | |
588 | switch (event->event) { | |
589 | case RDMA_CM_EVENT_ESTABLISHED: | |
590 | /* Accept complete */ | |
c48cbb40 | 591 | svc_xprt_get(xprt); |
377f9b2f TT |
592 | dprintk("svcrdma: Connection completed on DTO xprt=%p, " |
593 | "cm_id=%p\n", xprt, cma_id); | |
594 | clear_bit(RDMAXPRT_CONN_PENDING, &rdma->sc_flags); | |
595 | svc_xprt_enqueue(xprt); | |
596 | break; | |
597 | case RDMA_CM_EVENT_DISCONNECTED: | |
598 | dprintk("svcrdma: Disconnect on DTO xprt=%p, cm_id=%p\n", | |
599 | xprt, cma_id); | |
600 | if (xprt) { | |
601 | set_bit(XPT_CLOSE, &xprt->xpt_flags); | |
602 | svc_xprt_enqueue(xprt); | |
120693d1 | 603 | svc_xprt_put(xprt); |
377f9b2f TT |
604 | } |
605 | break; | |
606 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
607 | dprintk("svcrdma: Device removal cma_id=%p, xprt = %p, " | |
76357c71 SG |
608 | "event = %s (%d)\n", cma_id, xprt, |
609 | rdma_event_msg(event->event), event->event); | |
377f9b2f TT |
610 | if (xprt) { |
611 | set_bit(XPT_CLOSE, &xprt->xpt_flags); | |
612 | svc_xprt_enqueue(xprt); | |
ff79c74d | 613 | svc_xprt_put(xprt); |
377f9b2f TT |
614 | } |
615 | break; | |
616 | default: | |
617 | dprintk("svcrdma: Unexpected event on DTO endpoint %p, " | |
76357c71 SG |
618 | "event = %s (%d)\n", cma_id, |
619 | rdma_event_msg(event->event), event->event); | |
377f9b2f TT |
620 | break; |
621 | } | |
622 | return 0; | |
623 | } | |
624 | ||
625 | /* | |
626 | * Create a listening RDMA service endpoint. | |
627 | */ | |
628 | static struct svc_xprt *svc_rdma_create(struct svc_serv *serv, | |
62832c03 | 629 | struct net *net, |
377f9b2f TT |
630 | struct sockaddr *sa, int salen, |
631 | int flags) | |
632 | { | |
633 | struct rdma_cm_id *listen_id; | |
634 | struct svcxprt_rdma *cma_xprt; | |
377f9b2f TT |
635 | int ret; |
636 | ||
637 | dprintk("svcrdma: Creating RDMA socket\n"); | |
696190ea | 638 | if ((sa->sa_family != AF_INET) && (sa->sa_family != AF_INET6)) { |
bade732a TT |
639 | dprintk("svcrdma: Address family %d is not supported.\n", sa->sa_family); |
640 | return ERR_PTR(-EAFNOSUPPORT); | |
641 | } | |
377f9b2f TT |
642 | cma_xprt = rdma_create_xprt(serv, 1); |
643 | if (!cma_xprt) | |
58e8f621 | 644 | return ERR_PTR(-ENOMEM); |
377f9b2f | 645 | |
fa20105e GS |
646 | listen_id = rdma_create_id(&init_net, rdma_listen_handler, cma_xprt, |
647 | RDMA_PS_TCP, IB_QPT_RC); | |
377f9b2f | 648 | if (IS_ERR(listen_id)) { |
58e8f621 TT |
649 | ret = PTR_ERR(listen_id); |
650 | dprintk("svcrdma: rdma_create_id failed = %d\n", ret); | |
651 | goto err0; | |
377f9b2f | 652 | } |
58e8f621 | 653 | |
696190ea SM |
654 | /* Allow both IPv4 and IPv6 sockets to bind a single port |
655 | * at the same time. | |
656 | */ | |
657 | #if IS_ENABLED(CONFIG_IPV6) | |
658 | ret = rdma_set_afonly(listen_id, 1); | |
659 | if (ret) { | |
660 | dprintk("svcrdma: rdma_set_afonly failed = %d\n", ret); | |
661 | goto err1; | |
662 | } | |
663 | #endif | |
377f9b2f TT |
664 | ret = rdma_bind_addr(listen_id, sa); |
665 | if (ret) { | |
377f9b2f | 666 | dprintk("svcrdma: rdma_bind_addr failed = %d\n", ret); |
58e8f621 | 667 | goto err1; |
377f9b2f TT |
668 | } |
669 | cma_xprt->sc_cm_id = listen_id; | |
670 | ||
671 | ret = rdma_listen(listen_id, RPCRDMA_LISTEN_BACKLOG); | |
672 | if (ret) { | |
377f9b2f | 673 | dprintk("svcrdma: rdma_listen failed = %d\n", ret); |
58e8f621 | 674 | goto err1; |
377f9b2f TT |
675 | } |
676 | ||
677 | /* | |
678 | * We need to use the address from the cm_id in case the | |
679 | * caller specified 0 for the port number. | |
680 | */ | |
681 | sa = (struct sockaddr *)&cma_xprt->sc_cm_id->route.addr.src_addr; | |
682 | svc_xprt_set_local(&cma_xprt->sc_xprt, sa, salen); | |
683 | ||
684 | return &cma_xprt->sc_xprt; | |
58e8f621 TT |
685 | |
686 | err1: | |
687 | rdma_destroy_id(listen_id); | |
688 | err0: | |
689 | kfree(cma_xprt); | |
690 | return ERR_PTR(ret); | |
377f9b2f TT |
691 | } |
692 | ||
693 | /* | |
694 | * This is the xpo_recvfrom function for listening endpoints. Its | |
695 | * purpose is to accept incoming connections. The CMA callback handler | |
696 | * has already created a new transport and attached it to the new CMA | |
697 | * ID. | |
698 | * | |
699 | * There is a queue of pending connections hung on the listening | |
700 | * transport. This queue contains the new svc_xprt structure. This | |
701 | * function takes svc_xprt structures off the accept_q and completes | |
702 | * the connection. | |
703 | */ | |
704 | static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) | |
705 | { | |
706 | struct svcxprt_rdma *listen_rdma; | |
707 | struct svcxprt_rdma *newxprt = NULL; | |
708 | struct rdma_conn_param conn_param; | |
cc9d8340 | 709 | struct rpcrdma_connect_private pmsg; |
377f9b2f | 710 | struct ib_qp_init_attr qp_attr; |
e3e45b1b | 711 | struct ib_device *dev; |
07257450 | 712 | struct sockaddr *sap; |
26fb2254 | 713 | unsigned int i, ctxts; |
e3e45b1b | 714 | int ret = 0; |
377f9b2f TT |
715 | |
716 | listen_rdma = container_of(xprt, struct svcxprt_rdma, sc_xprt); | |
717 | clear_bit(XPT_CONN, &xprt->xpt_flags); | |
718 | /* Get the next entry off the accept list */ | |
719 | spin_lock_bh(&listen_rdma->sc_lock); | |
720 | if (!list_empty(&listen_rdma->sc_accept_q)) { | |
721 | newxprt = list_entry(listen_rdma->sc_accept_q.next, | |
722 | struct svcxprt_rdma, sc_accept_q); | |
723 | list_del_init(&newxprt->sc_accept_q); | |
724 | } | |
725 | if (!list_empty(&listen_rdma->sc_accept_q)) | |
726 | set_bit(XPT_CONN, &listen_rdma->sc_xprt.xpt_flags); | |
727 | spin_unlock_bh(&listen_rdma->sc_lock); | |
728 | if (!newxprt) | |
729 | return NULL; | |
730 | ||
731 | dprintk("svcrdma: newxprt from accept queue = %p, cm_id=%p\n", | |
732 | newxprt, newxprt->sc_cm_id); | |
733 | ||
e3e45b1b | 734 | dev = newxprt->sc_cm_id->device; |
f13193f5 | 735 | newxprt->sc_port_num = newxprt->sc_cm_id->port_num; |
377f9b2f TT |
736 | |
737 | /* Qualify the transport resource defaults with the | |
738 | * capabilities of this particular device */ | |
e3e45b1b | 739 | newxprt->sc_max_sge = min((size_t)dev->attrs.max_sge, |
377f9b2f | 740 | (size_t)RPCSVC_MAXPAGES); |
3d61677c | 741 | newxprt->sc_max_req_size = svcrdma_max_req_size; |
5a25bfd2 CL |
742 | newxprt->sc_max_requests = svcrdma_max_requests; |
743 | newxprt->sc_max_bc_requests = svcrdma_max_bc_requests; | |
03fe9931 CL |
744 | newxprt->sc_rq_depth = newxprt->sc_max_requests + |
745 | newxprt->sc_max_bc_requests; | |
5a25bfd2 CL |
746 | if (newxprt->sc_rq_depth > dev->attrs.max_qp_wr) { |
747 | pr_warn("svcrdma: reducing receive depth to %d\n", | |
748 | dev->attrs.max_qp_wr); | |
749 | newxprt->sc_rq_depth = dev->attrs.max_qp_wr; | |
750 | newxprt->sc_max_requests = newxprt->sc_rq_depth - 2; | |
751 | newxprt->sc_max_bc_requests = 2; | |
752 | } | |
753 | newxprt->sc_fc_credits = cpu_to_be32(newxprt->sc_max_requests); | |
26fb2254 CL |
754 | ctxts = rdma_rw_mr_factor(dev, newxprt->sc_port_num, RPCSVC_MAXPAGES); |
755 | ctxts *= newxprt->sc_max_requests; | |
756 | newxprt->sc_sq_depth = newxprt->sc_rq_depth + ctxts; | |
757 | if (newxprt->sc_sq_depth > dev->attrs.max_qp_wr) { | |
758 | pr_warn("svcrdma: reducing send depth to %d\n", | |
759 | dev->attrs.max_qp_wr); | |
760 | newxprt->sc_sq_depth = dev->attrs.max_qp_wr; | |
761 | } | |
e4eb42ce | 762 | atomic_set(&newxprt->sc_sq_avail, newxprt->sc_sq_depth); |
377f9b2f | 763 | |
cc886c9f CL |
764 | if (!svc_rdma_prealloc_ctxts(newxprt)) |
765 | goto errout; | |
766 | ||
ed082d36 | 767 | newxprt->sc_pd = ib_alloc_pd(dev, 0); |
377f9b2f TT |
768 | if (IS_ERR(newxprt->sc_pd)) { |
769 | dprintk("svcrdma: error creating PD for connect request\n"); | |
770 | goto errout; | |
771 | } | |
be99bb11 | 772 | newxprt->sc_sq_cq = ib_alloc_cq(dev, newxprt, newxprt->sc_sq_depth, |
81fa3275 | 773 | 0, IB_POLL_WORKQUEUE); |
377f9b2f TT |
774 | if (IS_ERR(newxprt->sc_sq_cq)) { |
775 | dprintk("svcrdma: error creating SQ CQ for connect request\n"); | |
776 | goto errout; | |
777 | } | |
8bd5ba86 | 778 | newxprt->sc_rq_cq = ib_alloc_cq(dev, newxprt, newxprt->sc_rq_depth, |
81fa3275 | 779 | 0, IB_POLL_WORKQUEUE); |
377f9b2f TT |
780 | if (IS_ERR(newxprt->sc_rq_cq)) { |
781 | dprintk("svcrdma: error creating RQ CQ for connect request\n"); | |
782 | goto errout; | |
783 | } | |
784 | ||
785 | memset(&qp_attr, 0, sizeof qp_attr); | |
786 | qp_attr.event_handler = qp_event_handler; | |
787 | qp_attr.qp_context = &newxprt->sc_xprt; | |
9450ca8e | 788 | qp_attr.port_num = newxprt->sc_port_num; |
26fb2254 CL |
789 | qp_attr.cap.max_rdma_ctxs = ctxts; |
790 | qp_attr.cap.max_send_wr = newxprt->sc_sq_depth - ctxts; | |
03fe9931 | 791 | qp_attr.cap.max_recv_wr = newxprt->sc_rq_depth; |
377f9b2f TT |
792 | qp_attr.cap.max_send_sge = newxprt->sc_max_sge; |
793 | qp_attr.cap.max_recv_sge = newxprt->sc_max_sge; | |
794 | qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
795 | qp_attr.qp_type = IB_QPT_RC; | |
796 | qp_attr.send_cq = newxprt->sc_sq_cq; | |
797 | qp_attr.recv_cq = newxprt->sc_rq_cq; | |
07257450 CL |
798 | dprintk("svcrdma: newxprt->sc_cm_id=%p, newxprt->sc_pd=%p\n", |
799 | newxprt->sc_cm_id, newxprt->sc_pd); | |
800 | dprintk(" cap.max_send_wr = %d, cap.max_recv_wr = %d\n", | |
801 | qp_attr.cap.max_send_wr, qp_attr.cap.max_recv_wr); | |
802 | dprintk(" cap.max_send_sge = %d, cap.max_recv_sge = %d\n", | |
803 | qp_attr.cap.max_send_sge, qp_attr.cap.max_recv_sge); | |
377f9b2f TT |
804 | |
805 | ret = rdma_create_qp(newxprt->sc_cm_id, newxprt->sc_pd, &qp_attr); | |
806 | if (ret) { | |
d1e458fe SW |
807 | dprintk("svcrdma: failed to create QP, ret=%d\n", ret); |
808 | goto errout; | |
377f9b2f TT |
809 | } |
810 | newxprt->sc_qp = newxprt->sc_cm_id->qp; | |
811 | ||
9450ca8e | 812 | if (!(dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS)) |
25d55296 | 813 | newxprt->sc_snd_w_inv = false; |
9450ca8e CL |
814 | if (!rdma_protocol_iwarp(dev, newxprt->sc_port_num) && |
815 | !rdma_ib_or_roce(dev, newxprt->sc_port_num)) | |
377f9b2f | 816 | goto errout; |
3de2c31c | 817 | |
377f9b2f | 818 | /* Post receive buffers */ |
0319aafc | 819 | for (i = 0; i < newxprt->sc_max_requests; i++) { |
48272502 | 820 | ret = svc_rdma_post_recv(newxprt); |
377f9b2f TT |
821 | if (ret) { |
822 | dprintk("svcrdma: failure posting receive buffers\n"); | |
823 | goto errout; | |
824 | } | |
825 | } | |
826 | ||
827 | /* Swap out the handler */ | |
828 | newxprt->sc_cm_id->event_handler = rdma_cma_handler; | |
829 | ||
cc9d8340 CL |
830 | /* Construct RDMA-CM private message */ |
831 | pmsg.cp_magic = rpcrdma_cmp_magic; | |
832 | pmsg.cp_version = RPCRDMA_CMP_VERSION; | |
833 | pmsg.cp_flags = 0; | |
834 | pmsg.cp_send_size = pmsg.cp_recv_size = | |
835 | rpcrdma_encode_buffer_size(newxprt->sc_max_req_size); | |
836 | ||
377f9b2f TT |
837 | /* Accept Connection */ |
838 | set_bit(RDMAXPRT_CONN_PENDING, &newxprt->sc_flags); | |
839 | memset(&conn_param, 0, sizeof conn_param); | |
840 | conn_param.responder_resources = 0; | |
97cc3264 CL |
841 | conn_param.initiator_depth = min_t(int, newxprt->sc_ord, |
842 | dev->attrs.max_qp_init_rd_atom); | |
843 | if (!conn_param.initiator_depth) { | |
844 | dprintk("svcrdma: invalid ORD setting\n"); | |
845 | ret = -EINVAL; | |
846 | goto errout; | |
847 | } | |
cc9d8340 CL |
848 | conn_param.private_data = &pmsg; |
849 | conn_param.private_data_len = sizeof(pmsg); | |
377f9b2f | 850 | ret = rdma_accept(newxprt->sc_cm_id, &conn_param); |
97cc3264 | 851 | if (ret) |
377f9b2f | 852 | goto errout; |
377f9b2f | 853 | |
07257450 CL |
854 | dprintk("svcrdma: new connection %p accepted:\n", newxprt); |
855 | sap = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.src_addr; | |
856 | dprintk(" local address : %pIS:%u\n", sap, rpc_get_port(sap)); | |
857 | sap = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.dst_addr; | |
858 | dprintk(" remote address : %pIS:%u\n", sap, rpc_get_port(sap)); | |
859 | dprintk(" max_sge : %d\n", newxprt->sc_max_sge); | |
07257450 | 860 | dprintk(" sq_depth : %d\n", newxprt->sc_sq_depth); |
26fb2254 | 861 | dprintk(" rdma_rw_ctxs : %d\n", ctxts); |
07257450 | 862 | dprintk(" max_requests : %d\n", newxprt->sc_max_requests); |
97cc3264 | 863 | dprintk(" ord : %d\n", conn_param.initiator_depth); |
377f9b2f | 864 | |
377f9b2f TT |
865 | return &newxprt->sc_xprt; |
866 | ||
867 | errout: | |
868 | dprintk("svcrdma: failure accepting new connection rc=%d.\n", ret); | |
c48cbb40 TT |
869 | /* Take a reference in case the DTO handler runs */ |
870 | svc_xprt_get(&newxprt->sc_xprt); | |
1711386c | 871 | if (newxprt->sc_qp && !IS_ERR(newxprt->sc_qp)) |
c48cbb40 | 872 | ib_destroy_qp(newxprt->sc_qp); |
377f9b2f | 873 | rdma_destroy_id(newxprt->sc_cm_id); |
c48cbb40 TT |
874 | /* This call to put will destroy the transport */ |
875 | svc_xprt_put(&newxprt->sc_xprt); | |
377f9b2f TT |
876 | return NULL; |
877 | } | |
878 | ||
377f9b2f TT |
879 | static void svc_rdma_release_rqst(struct svc_rqst *rqstp) |
880 | { | |
377f9b2f TT |
881 | } |
882 | ||
c48cbb40 | 883 | /* |
1711386c | 884 | * When connected, an svc_xprt has at least two references: |
c48cbb40 TT |
885 | * |
886 | * - A reference held by the cm_id between the ESTABLISHED and | |
887 | * DISCONNECTED events. If the remote peer disconnected first, this | |
888 | * reference could be gone. | |
889 | * | |
890 | * - A reference held by the svc_recv code that called this function | |
891 | * as part of close processing. | |
892 | * | |
1711386c | 893 | * At a minimum one references should still be held. |
c48cbb40 | 894 | */ |
377f9b2f TT |
895 | static void svc_rdma_detach(struct svc_xprt *xprt) |
896 | { | |
897 | struct svcxprt_rdma *rdma = | |
898 | container_of(xprt, struct svcxprt_rdma, sc_xprt); | |
377f9b2f | 899 | dprintk("svc: svc_rdma_detach(%p)\n", xprt); |
c48cbb40 TT |
900 | |
901 | /* Disconnect and flush posted WQE */ | |
377f9b2f | 902 | rdma_disconnect(rdma->sc_cm_id); |
377f9b2f TT |
903 | } |
904 | ||
8da91ea8 | 905 | static void __svc_rdma_free(struct work_struct *work) |
377f9b2f | 906 | { |
8da91ea8 TT |
907 | struct svcxprt_rdma *rdma = |
908 | container_of(work, struct svcxprt_rdma, sc_work); | |
5d252f90 CL |
909 | struct svc_xprt *xprt = &rdma->sc_xprt; |
910 | ||
911 | dprintk("svcrdma: %s(%p)\n", __func__, rdma); | |
8da91ea8 | 912 | |
76ee8fd6 CL |
913 | if (rdma->sc_qp && !IS_ERR(rdma->sc_qp)) |
914 | ib_drain_qp(rdma->sc_qp); | |
915 | ||
c48cbb40 | 916 | /* We should only be called from kref_put */ |
2c935bc5 | 917 | if (kref_read(&xprt->xpt_ref) != 0) |
3fe04ee9 | 918 | pr_err("svcrdma: sc_xprt still in use? (%d)\n", |
2c935bc5 | 919 | kref_read(&xprt->xpt_ref)); |
8da91ea8 | 920 | |
356d0a15 TT |
921 | while (!list_empty(&rdma->sc_read_complete_q)) { |
922 | struct svc_rdma_op_ctxt *ctxt; | |
a3ab867f CL |
923 | ctxt = list_first_entry(&rdma->sc_read_complete_q, |
924 | struct svc_rdma_op_ctxt, list); | |
925 | list_del(&ctxt->list); | |
356d0a15 TT |
926 | svc_rdma_put_context(ctxt, 1); |
927 | } | |
356d0a15 TT |
928 | while (!list_empty(&rdma->sc_rq_dto_q)) { |
929 | struct svc_rdma_op_ctxt *ctxt; | |
a3ab867f CL |
930 | ctxt = list_first_entry(&rdma->sc_rq_dto_q, |
931 | struct svc_rdma_op_ctxt, list); | |
932 | list_del(&ctxt->list); | |
356d0a15 TT |
933 | svc_rdma_put_context(ctxt, 1); |
934 | } | |
356d0a15 TT |
935 | |
936 | /* Warn if we leaked a resource or under-referenced */ | |
cc886c9f | 937 | if (rdma->sc_ctxt_used != 0) |
3fe04ee9 | 938 | pr_err("svcrdma: ctxt still in use? (%d)\n", |
cc886c9f | 939 | rdma->sc_ctxt_used); |
356d0a15 | 940 | |
5d252f90 CL |
941 | /* Final put of backchannel client transport */ |
942 | if (xprt->xpt_bc_xprt) { | |
943 | xprt_put(xprt->xpt_bc_xprt); | |
944 | xprt->xpt_bc_xprt = NULL; | |
945 | } | |
946 | ||
f13193f5 | 947 | svc_rdma_destroy_rw_ctxts(rdma); |
cc886c9f | 948 | svc_rdma_destroy_ctxts(rdma); |
64be8608 | 949 | |
1711386c TT |
950 | /* Destroy the QP if present (not a listener) */ |
951 | if (rdma->sc_qp && !IS_ERR(rdma->sc_qp)) | |
952 | ib_destroy_qp(rdma->sc_qp); | |
953 | ||
c48cbb40 | 954 | if (rdma->sc_sq_cq && !IS_ERR(rdma->sc_sq_cq)) |
be99bb11 | 955 | ib_free_cq(rdma->sc_sq_cq); |
377f9b2f | 956 | |
c48cbb40 | 957 | if (rdma->sc_rq_cq && !IS_ERR(rdma->sc_rq_cq)) |
8bd5ba86 | 958 | ib_free_cq(rdma->sc_rq_cq); |
377f9b2f | 959 | |
c48cbb40 TT |
960 | if (rdma->sc_pd && !IS_ERR(rdma->sc_pd)) |
961 | ib_dealloc_pd(rdma->sc_pd); | |
377f9b2f | 962 | |
356d0a15 TT |
963 | /* Destroy the CM ID */ |
964 | rdma_destroy_id(rdma->sc_cm_id); | |
965 | ||
c48cbb40 | 966 | kfree(rdma); |
377f9b2f TT |
967 | } |
968 | ||
8da91ea8 TT |
969 | static void svc_rdma_free(struct svc_xprt *xprt) |
970 | { | |
971 | struct svcxprt_rdma *rdma = | |
972 | container_of(xprt, struct svcxprt_rdma, sc_xprt); | |
973 | INIT_WORK(&rdma->sc_work, __svc_rdma_free); | |
a25e758c | 974 | queue_work(svc_rdma_wq, &rdma->sc_work); |
8da91ea8 TT |
975 | } |
976 | ||
377f9b2f TT |
977 | static int svc_rdma_has_wspace(struct svc_xprt *xprt) |
978 | { | |
979 | struct svcxprt_rdma *rdma = | |
980 | container_of(xprt, struct svcxprt_rdma, sc_xprt); | |
981 | ||
982 | /* | |
0bf48289 | 983 | * If there are already waiters on the SQ, |
377f9b2f TT |
984 | * return false. |
985 | */ | |
986 | if (waitqueue_active(&rdma->sc_send_wait)) | |
987 | return 0; | |
988 | ||
989 | /* Otherwise return true. */ | |
990 | return 1; | |
991 | } | |
992 | ||
989f881e | 993 | static void svc_rdma_secure_port(struct svc_rqst *rqstp) |
16e4d93f | 994 | { |
989f881e | 995 | set_bit(RQ_SECURE, &rqstp->rq_flags); |
16e4d93f CL |
996 | } |
997 | ||
ea08e392 SM |
998 | static void svc_rdma_kill_temp_xprt(struct svc_xprt *xprt) |
999 | { | |
1000 | } | |
1001 | ||
377f9b2f TT |
1002 | int svc_rdma_send(struct svcxprt_rdma *xprt, struct ib_send_wr *wr) |
1003 | { | |
5b180a9a TT |
1004 | struct ib_send_wr *bad_wr, *n_wr; |
1005 | int wr_count; | |
1006 | int i; | |
377f9b2f TT |
1007 | int ret; |
1008 | ||
1009 | if (test_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags)) | |
9d6347ac | 1010 | return -ENOTCONN; |
377f9b2f | 1011 | |
5b180a9a TT |
1012 | wr_count = 1; |
1013 | for (n_wr = wr->next; n_wr; n_wr = n_wr->next) | |
1014 | wr_count++; | |
1015 | ||
377f9b2f TT |
1016 | /* If the SQ is full, wait until an SQ entry is available */ |
1017 | while (1) { | |
e4eb42ce | 1018 | if ((atomic_sub_return(wr_count, &xprt->sc_sq_avail) < 0)) { |
377f9b2f | 1019 | atomic_inc(&rdma_stat_sq_starve); |
dbcd00eb | 1020 | |
377f9b2f | 1021 | /* Wait until SQ WR available if SQ still full */ |
e4eb42ce | 1022 | atomic_add(wr_count, &xprt->sc_sq_avail); |
377f9b2f | 1023 | wait_event(xprt->sc_send_wait, |
e4eb42ce | 1024 | atomic_read(&xprt->sc_sq_avail) > wr_count); |
830bb59b | 1025 | if (test_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags)) |
b432e6b3 | 1026 | return -ENOTCONN; |
377f9b2f TT |
1027 | continue; |
1028 | } | |
5b180a9a TT |
1029 | /* Take a transport ref for each WR posted */ |
1030 | for (i = 0; i < wr_count; i++) | |
1031 | svc_xprt_get(&xprt->sc_xprt); | |
1032 | ||
1033 | /* Bump used SQ WR count and post */ | |
377f9b2f | 1034 | ret = ib_post_send(xprt->sc_qp, wr, &bad_wr); |
5b180a9a TT |
1035 | if (ret) { |
1036 | set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); | |
5b180a9a TT |
1037 | for (i = 0; i < wr_count; i ++) |
1038 | svc_xprt_put(&xprt->sc_xprt); | |
e4eb42ce CL |
1039 | dprintk("svcrdma: failed to post SQ WR rc=%d\n", ret); |
1040 | dprintk(" sc_sq_avail=%d, sc_sq_depth=%d\n", | |
1041 | atomic_read(&xprt->sc_sq_avail), | |
1042 | xprt->sc_sq_depth); | |
5b180a9a | 1043 | wake_up(&xprt->sc_send_wait); |
e4eb42ce | 1044 | } |
377f9b2f TT |
1045 | break; |
1046 | } | |
1047 | return ret; | |
1048 | } |