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f58851e6 | 1 | /* |
c56c65fb TT |
2 | * Copyright (c) 2003-2007 Network Appliance, Inc. 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 BSD-type | |
8 | * license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * | |
14 | * Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions and the following disclaimer. | |
16 | * | |
17 | * Redistributions in binary form must reproduce the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer in the documentation and/or other materials provided | |
20 | * with the distribution. | |
21 | * | |
22 | * Neither the name of the Network Appliance, Inc. nor the names of | |
23 | * its contributors may be used to endorse or promote products | |
24 | * derived from this software without specific prior written | |
25 | * permission. | |
26 | * | |
27 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
28 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
29 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
30 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
31 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
32 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
33 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
34 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
35 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
36 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
37 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
f58851e6 TT |
38 | */ |
39 | ||
c56c65fb TT |
40 | /* |
41 | * verbs.c | |
42 | * | |
43 | * Encapsulates the major functions managing: | |
44 | * o adapters | |
45 | * o endpoints | |
46 | * o connections | |
47 | * o buffer memory | |
48 | */ | |
49 | ||
a6b7a407 | 50 | #include <linux/interrupt.h> |
5a0e3ad6 | 51 | #include <linux/slab.h> |
eba8ff66 | 52 | #include <linux/prefetch.h> |
65866f82 | 53 | #include <asm/bitops.h> |
c56c65fb | 54 | |
f58851e6 TT |
55 | #include "xprt_rdma.h" |
56 | ||
c56c65fb TT |
57 | /* |
58 | * Globals/Macros | |
59 | */ | |
60 | ||
f895b252 | 61 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
c56c65fb TT |
62 | # define RPCDBG_FACILITY RPCDBG_TRANS |
63 | #endif | |
64 | ||
9f9d802a | 65 | static void rpcrdma_reset_frmrs(struct rpcrdma_ia *); |
467c9674 | 66 | static void rpcrdma_reset_fmrs(struct rpcrdma_ia *); |
9f9d802a | 67 | |
c56c65fb TT |
68 | /* |
69 | * internal functions | |
70 | */ | |
71 | ||
72 | /* | |
73 | * handle replies in tasklet context, using a single, global list | |
74 | * rdma tasklet function -- just turn around and call the func | |
75 | * for all replies on the list | |
76 | */ | |
77 | ||
78 | static DEFINE_SPINLOCK(rpcrdma_tk_lock_g); | |
79 | static LIST_HEAD(rpcrdma_tasklets_g); | |
80 | ||
81 | static void | |
82 | rpcrdma_run_tasklet(unsigned long data) | |
83 | { | |
84 | struct rpcrdma_rep *rep; | |
85 | void (*func)(struct rpcrdma_rep *); | |
86 | unsigned long flags; | |
87 | ||
88 | data = data; | |
89 | spin_lock_irqsave(&rpcrdma_tk_lock_g, flags); | |
90 | while (!list_empty(&rpcrdma_tasklets_g)) { | |
91 | rep = list_entry(rpcrdma_tasklets_g.next, | |
92 | struct rpcrdma_rep, rr_list); | |
93 | list_del(&rep->rr_list); | |
94 | func = rep->rr_func; | |
95 | rep->rr_func = NULL; | |
96 | spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags); | |
97 | ||
98 | if (func) | |
99 | func(rep); | |
100 | else | |
101 | rpcrdma_recv_buffer_put(rep); | |
102 | ||
103 | spin_lock_irqsave(&rpcrdma_tk_lock_g, flags); | |
104 | } | |
105 | spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags); | |
106 | } | |
107 | ||
108 | static DECLARE_TASKLET(rpcrdma_tasklet_g, rpcrdma_run_tasklet, 0UL); | |
109 | ||
7ff11de1 CL |
110 | static const char * const async_event[] = { |
111 | "CQ error", | |
112 | "QP fatal error", | |
113 | "QP request error", | |
114 | "QP access error", | |
115 | "communication established", | |
116 | "send queue drained", | |
117 | "path migration successful", | |
118 | "path mig error", | |
119 | "device fatal error", | |
120 | "port active", | |
121 | "port error", | |
122 | "LID change", | |
123 | "P_key change", | |
124 | "SM change", | |
125 | "SRQ error", | |
126 | "SRQ limit reached", | |
127 | "last WQE reached", | |
128 | "client reregister", | |
129 | "GID change", | |
130 | }; | |
131 | ||
132 | #define ASYNC_MSG(status) \ | |
133 | ((status) < ARRAY_SIZE(async_event) ? \ | |
134 | async_event[(status)] : "unknown async error") | |
135 | ||
f1a03b76 CL |
136 | static void |
137 | rpcrdma_schedule_tasklet(struct list_head *sched_list) | |
138 | { | |
139 | unsigned long flags; | |
140 | ||
141 | spin_lock_irqsave(&rpcrdma_tk_lock_g, flags); | |
142 | list_splice_tail(sched_list, &rpcrdma_tasklets_g); | |
143 | spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags); | |
144 | tasklet_schedule(&rpcrdma_tasklet_g); | |
145 | } | |
146 | ||
c56c65fb TT |
147 | static void |
148 | rpcrdma_qp_async_error_upcall(struct ib_event *event, void *context) | |
149 | { | |
150 | struct rpcrdma_ep *ep = context; | |
151 | ||
7ff11de1 CL |
152 | pr_err("RPC: %s: %s on device %s ep %p\n", |
153 | __func__, ASYNC_MSG(event->event), | |
154 | event->device->name, context); | |
c56c65fb TT |
155 | if (ep->rep_connected == 1) { |
156 | ep->rep_connected = -EIO; | |
afadc468 | 157 | rpcrdma_conn_func(ep); |
c56c65fb TT |
158 | wake_up_all(&ep->rep_connect_wait); |
159 | } | |
160 | } | |
161 | ||
162 | static void | |
163 | rpcrdma_cq_async_error_upcall(struct ib_event *event, void *context) | |
164 | { | |
165 | struct rpcrdma_ep *ep = context; | |
166 | ||
7ff11de1 CL |
167 | pr_err("RPC: %s: %s on device %s ep %p\n", |
168 | __func__, ASYNC_MSG(event->event), | |
169 | event->device->name, context); | |
c56c65fb TT |
170 | if (ep->rep_connected == 1) { |
171 | ep->rep_connected = -EIO; | |
afadc468 | 172 | rpcrdma_conn_func(ep); |
c56c65fb TT |
173 | wake_up_all(&ep->rep_connect_wait); |
174 | } | |
175 | } | |
176 | ||
8502427c CL |
177 | static const char * const wc_status[] = { |
178 | "success", | |
179 | "local length error", | |
180 | "local QP operation error", | |
181 | "local EE context operation error", | |
182 | "local protection error", | |
183 | "WR flushed", | |
184 | "memory management operation error", | |
185 | "bad response error", | |
186 | "local access error", | |
187 | "remote invalid request error", | |
188 | "remote access error", | |
189 | "remote operation error", | |
190 | "transport retry counter exceeded", | |
191 | "RNR retrycounter exceeded", | |
192 | "local RDD violation error", | |
193 | "remove invalid RD request", | |
194 | "operation aborted", | |
195 | "invalid EE context number", | |
196 | "invalid EE context state", | |
197 | "fatal error", | |
198 | "response timeout error", | |
199 | "general error", | |
200 | }; | |
201 | ||
202 | #define COMPLETION_MSG(status) \ | |
203 | ((status) < ARRAY_SIZE(wc_status) ? \ | |
204 | wc_status[(status)] : "unexpected completion error") | |
205 | ||
fc664485 CL |
206 | static void |
207 | rpcrdma_sendcq_process_wc(struct ib_wc *wc) | |
c56c65fb | 208 | { |
8502427c | 209 | if (likely(wc->status == IB_WC_SUCCESS)) |
c56c65fb | 210 | return; |
8502427c CL |
211 | |
212 | /* WARNING: Only wr_id and status are reliable at this point */ | |
213 | if (wc->wr_id == 0ULL) { | |
214 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
215 | pr_err("RPC: %s: SEND: %s\n", | |
216 | __func__, COMPLETION_MSG(wc->status)); | |
217 | } else { | |
218 | struct rpcrdma_mw *r; | |
219 | ||
220 | r = (struct rpcrdma_mw *)(unsigned long)wc->wr_id; | |
221 | r->r.frmr.fr_state = FRMR_IS_STALE; | |
222 | pr_err("RPC: %s: frmr %p (stale): %s\n", | |
223 | __func__, r, COMPLETION_MSG(wc->status)); | |
224 | } | |
c56c65fb TT |
225 | } |
226 | ||
fc664485 | 227 | static int |
1c00dd07 | 228 | rpcrdma_sendcq_poll(struct ib_cq *cq, struct rpcrdma_ep *ep) |
c56c65fb | 229 | { |
1c00dd07 | 230 | struct ib_wc *wcs; |
8301a2c0 | 231 | int budget, count, rc; |
c56c65fb | 232 | |
8301a2c0 | 233 | budget = RPCRDMA_WC_BUDGET / RPCRDMA_POLLSIZE; |
1c00dd07 CL |
234 | do { |
235 | wcs = ep->rep_send_wcs; | |
236 | ||
237 | rc = ib_poll_cq(cq, RPCRDMA_POLLSIZE, wcs); | |
238 | if (rc <= 0) | |
239 | return rc; | |
240 | ||
241 | count = rc; | |
242 | while (count-- > 0) | |
243 | rpcrdma_sendcq_process_wc(wcs++); | |
8301a2c0 | 244 | } while (rc == RPCRDMA_POLLSIZE && --budget); |
1c00dd07 | 245 | return 0; |
fc664485 | 246 | } |
c56c65fb | 247 | |
fc664485 CL |
248 | /* |
249 | * Handle send, fast_reg_mr, and local_inv completions. | |
250 | * | |
251 | * Send events are typically suppressed and thus do not result | |
252 | * in an upcall. Occasionally one is signaled, however. This | |
253 | * prevents the provider's completion queue from wrapping and | |
254 | * losing a completion. | |
255 | */ | |
256 | static void | |
257 | rpcrdma_sendcq_upcall(struct ib_cq *cq, void *cq_context) | |
258 | { | |
1c00dd07 | 259 | struct rpcrdma_ep *ep = (struct rpcrdma_ep *)cq_context; |
fc664485 CL |
260 | int rc; |
261 | ||
1c00dd07 | 262 | rc = rpcrdma_sendcq_poll(cq, ep); |
fc664485 CL |
263 | if (rc) { |
264 | dprintk("RPC: %s: ib_poll_cq failed: %i\n", | |
265 | __func__, rc); | |
266 | return; | |
c56c65fb TT |
267 | } |
268 | ||
7f23f6f6 CL |
269 | rc = ib_req_notify_cq(cq, |
270 | IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS); | |
271 | if (rc == 0) | |
272 | return; | |
273 | if (rc < 0) { | |
fc664485 CL |
274 | dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", |
275 | __func__, rc); | |
276 | return; | |
277 | } | |
278 | ||
1c00dd07 | 279 | rpcrdma_sendcq_poll(cq, ep); |
fc664485 CL |
280 | } |
281 | ||
282 | static void | |
bb96193d | 283 | rpcrdma_recvcq_process_wc(struct ib_wc *wc, struct list_head *sched_list) |
fc664485 CL |
284 | { |
285 | struct rpcrdma_rep *rep = | |
286 | (struct rpcrdma_rep *)(unsigned long)wc->wr_id; | |
287 | ||
8502427c CL |
288 | /* WARNING: Only wr_id and status are reliable at this point */ |
289 | if (wc->status != IB_WC_SUCCESS) | |
290 | goto out_fail; | |
fc664485 | 291 | |
8502427c | 292 | /* status == SUCCESS means all fields in wc are trustworthy */ |
fc664485 CL |
293 | if (wc->opcode != IB_WC_RECV) |
294 | return; | |
295 | ||
8502427c CL |
296 | dprintk("RPC: %s: rep %p opcode 'recv', length %u: success\n", |
297 | __func__, rep, wc->byte_len); | |
298 | ||
fc664485 CL |
299 | rep->rr_len = wc->byte_len; |
300 | ib_dma_sync_single_for_cpu(rdmab_to_ia(rep->rr_buffer)->ri_id->device, | |
301 | rep->rr_iov.addr, rep->rr_len, DMA_FROM_DEVICE); | |
eba8ff66 | 302 | prefetch(rep->rr_base); |
fc664485 CL |
303 | |
304 | out_schedule: | |
bb96193d | 305 | list_add_tail(&rep->rr_list, sched_list); |
8502427c CL |
306 | return; |
307 | out_fail: | |
308 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
309 | pr_err("RPC: %s: rep %p: %s\n", | |
310 | __func__, rep, COMPLETION_MSG(wc->status)); | |
311 | rep->rr_len = ~0U; | |
312 | goto out_schedule; | |
fc664485 CL |
313 | } |
314 | ||
315 | static int | |
1c00dd07 | 316 | rpcrdma_recvcq_poll(struct ib_cq *cq, struct rpcrdma_ep *ep) |
fc664485 | 317 | { |
bb96193d | 318 | struct list_head sched_list; |
1c00dd07 | 319 | struct ib_wc *wcs; |
8301a2c0 | 320 | int budget, count, rc; |
fc664485 | 321 | |
bb96193d | 322 | INIT_LIST_HEAD(&sched_list); |
8301a2c0 | 323 | budget = RPCRDMA_WC_BUDGET / RPCRDMA_POLLSIZE; |
1c00dd07 CL |
324 | do { |
325 | wcs = ep->rep_recv_wcs; | |
326 | ||
327 | rc = ib_poll_cq(cq, RPCRDMA_POLLSIZE, wcs); | |
328 | if (rc <= 0) | |
bb96193d | 329 | goto out_schedule; |
1c00dd07 CL |
330 | |
331 | count = rc; | |
332 | while (count-- > 0) | |
bb96193d | 333 | rpcrdma_recvcq_process_wc(wcs++, &sched_list); |
8301a2c0 | 334 | } while (rc == RPCRDMA_POLLSIZE && --budget); |
bb96193d CL |
335 | rc = 0; |
336 | ||
337 | out_schedule: | |
f1a03b76 | 338 | rpcrdma_schedule_tasklet(&sched_list); |
bb96193d | 339 | return rc; |
c56c65fb TT |
340 | } |
341 | ||
342 | /* | |
fc664485 | 343 | * Handle receive completions. |
c56c65fb | 344 | * |
c56c65fb TT |
345 | * It is reentrant but processes single events in order to maintain |
346 | * ordering of receives to keep server credits. | |
347 | * | |
348 | * It is the responsibility of the scheduled tasklet to return | |
349 | * recv buffers to the pool. NOTE: this affects synchronization of | |
350 | * connection shutdown. That is, the structures required for | |
351 | * the completion of the reply handler must remain intact until | |
352 | * all memory has been reclaimed. | |
c56c65fb TT |
353 | */ |
354 | static void | |
fc664485 | 355 | rpcrdma_recvcq_upcall(struct ib_cq *cq, void *cq_context) |
c56c65fb | 356 | { |
1c00dd07 | 357 | struct rpcrdma_ep *ep = (struct rpcrdma_ep *)cq_context; |
c56c65fb TT |
358 | int rc; |
359 | ||
1c00dd07 | 360 | rc = rpcrdma_recvcq_poll(cq, ep); |
fc664485 CL |
361 | if (rc) { |
362 | dprintk("RPC: %s: ib_poll_cq failed: %i\n", | |
363 | __func__, rc); | |
c56c65fb | 364 | return; |
fc664485 | 365 | } |
c56c65fb | 366 | |
7f23f6f6 CL |
367 | rc = ib_req_notify_cq(cq, |
368 | IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS); | |
369 | if (rc == 0) | |
370 | return; | |
371 | if (rc < 0) { | |
fc664485 | 372 | dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", |
c56c65fb TT |
373 | __func__, rc); |
374 | return; | |
375 | } | |
376 | ||
1c00dd07 | 377 | rpcrdma_recvcq_poll(cq, ep); |
c56c65fb TT |
378 | } |
379 | ||
a7bc211a CL |
380 | static void |
381 | rpcrdma_flush_cqs(struct rpcrdma_ep *ep) | |
382 | { | |
5c166bef CL |
383 | struct ib_wc wc; |
384 | LIST_HEAD(sched_list); | |
385 | ||
386 | while (ib_poll_cq(ep->rep_attr.recv_cq, 1, &wc) > 0) | |
387 | rpcrdma_recvcq_process_wc(&wc, &sched_list); | |
388 | if (!list_empty(&sched_list)) | |
389 | rpcrdma_schedule_tasklet(&sched_list); | |
390 | while (ib_poll_cq(ep->rep_attr.send_cq, 1, &wc) > 0) | |
391 | rpcrdma_sendcq_process_wc(&wc); | |
a7bc211a CL |
392 | } |
393 | ||
f895b252 | 394 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
c56c65fb TT |
395 | static const char * const conn[] = { |
396 | "address resolved", | |
397 | "address error", | |
398 | "route resolved", | |
399 | "route error", | |
400 | "connect request", | |
401 | "connect response", | |
402 | "connect error", | |
403 | "unreachable", | |
404 | "rejected", | |
405 | "established", | |
406 | "disconnected", | |
8079fb78 CL |
407 | "device removal", |
408 | "multicast join", | |
409 | "multicast error", | |
410 | "address change", | |
411 | "timewait exit", | |
c56c65fb | 412 | }; |
8079fb78 CL |
413 | |
414 | #define CONNECTION_MSG(status) \ | |
415 | ((status) < ARRAY_SIZE(conn) ? \ | |
416 | conn[(status)] : "unrecognized connection error") | |
c56c65fb TT |
417 | #endif |
418 | ||
419 | static int | |
420 | rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event) | |
421 | { | |
422 | struct rpcrdma_xprt *xprt = id->context; | |
423 | struct rpcrdma_ia *ia = &xprt->rx_ia; | |
424 | struct rpcrdma_ep *ep = &xprt->rx_ep; | |
f895b252 | 425 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
c56c65fb | 426 | struct sockaddr_in *addr = (struct sockaddr_in *) &ep->rep_remote_addr; |
ff0db049 | 427 | #endif |
ce1ab9ab CL |
428 | struct ib_qp_attr *attr = &ia->ri_qp_attr; |
429 | struct ib_qp_init_attr *iattr = &ia->ri_qp_init_attr; | |
c56c65fb TT |
430 | int connstate = 0; |
431 | ||
432 | switch (event->event) { | |
433 | case RDMA_CM_EVENT_ADDR_RESOLVED: | |
434 | case RDMA_CM_EVENT_ROUTE_RESOLVED: | |
5675add3 | 435 | ia->ri_async_rc = 0; |
c56c65fb TT |
436 | complete(&ia->ri_done); |
437 | break; | |
438 | case RDMA_CM_EVENT_ADDR_ERROR: | |
439 | ia->ri_async_rc = -EHOSTUNREACH; | |
440 | dprintk("RPC: %s: CM address resolution error, ep 0x%p\n", | |
441 | __func__, ep); | |
442 | complete(&ia->ri_done); | |
443 | break; | |
444 | case RDMA_CM_EVENT_ROUTE_ERROR: | |
445 | ia->ri_async_rc = -ENETUNREACH; | |
446 | dprintk("RPC: %s: CM route resolution error, ep 0x%p\n", | |
447 | __func__, ep); | |
448 | complete(&ia->ri_done); | |
449 | break; | |
450 | case RDMA_CM_EVENT_ESTABLISHED: | |
451 | connstate = 1; | |
ce1ab9ab CL |
452 | ib_query_qp(ia->ri_id->qp, attr, |
453 | IB_QP_MAX_QP_RD_ATOMIC | IB_QP_MAX_DEST_RD_ATOMIC, | |
454 | iattr); | |
c56c65fb TT |
455 | dprintk("RPC: %s: %d responder resources" |
456 | " (%d initiator)\n", | |
ce1ab9ab CL |
457 | __func__, attr->max_dest_rd_atomic, |
458 | attr->max_rd_atomic); | |
c56c65fb TT |
459 | goto connected; |
460 | case RDMA_CM_EVENT_CONNECT_ERROR: | |
461 | connstate = -ENOTCONN; | |
462 | goto connected; | |
463 | case RDMA_CM_EVENT_UNREACHABLE: | |
464 | connstate = -ENETDOWN; | |
465 | goto connected; | |
466 | case RDMA_CM_EVENT_REJECTED: | |
467 | connstate = -ECONNREFUSED; | |
468 | goto connected; | |
469 | case RDMA_CM_EVENT_DISCONNECTED: | |
470 | connstate = -ECONNABORTED; | |
471 | goto connected; | |
472 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
473 | connstate = -ENODEV; | |
474 | connected: | |
c56c65fb TT |
475 | dprintk("RPC: %s: %sconnected\n", |
476 | __func__, connstate > 0 ? "" : "dis"); | |
477 | ep->rep_connected = connstate; | |
afadc468 | 478 | rpcrdma_conn_func(ep); |
c56c65fb | 479 | wake_up_all(&ep->rep_connect_wait); |
8079fb78 | 480 | /*FALLTHROUGH*/ |
c56c65fb | 481 | default: |
8079fb78 CL |
482 | dprintk("RPC: %s: %pI4:%u (ep 0x%p): %s\n", |
483 | __func__, &addr->sin_addr.s_addr, | |
484 | ntohs(addr->sin_port), ep, | |
485 | CONNECTION_MSG(event->event)); | |
c56c65fb TT |
486 | break; |
487 | } | |
488 | ||
f895b252 | 489 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
b3cd8d45 | 490 | if (connstate == 1) { |
ce1ab9ab | 491 | int ird = attr->max_dest_rd_atomic; |
b3cd8d45 | 492 | int tird = ep->rep_remote_cma.responder_resources; |
21454aaa | 493 | printk(KERN_INFO "rpcrdma: connection to %pI4:%u " |
b3cd8d45 | 494 | "on %s, memreg %d slots %d ird %d%s\n", |
21454aaa | 495 | &addr->sin_addr.s_addr, |
b3cd8d45 TT |
496 | ntohs(addr->sin_port), |
497 | ia->ri_id->device->name, | |
498 | ia->ri_memreg_strategy, | |
499 | xprt->rx_buf.rb_max_requests, | |
500 | ird, ird < 4 && ird < tird / 2 ? " (low!)" : ""); | |
501 | } else if (connstate < 0) { | |
21454aaa HH |
502 | printk(KERN_INFO "rpcrdma: connection to %pI4:%u closed (%d)\n", |
503 | &addr->sin_addr.s_addr, | |
b3cd8d45 TT |
504 | ntohs(addr->sin_port), |
505 | connstate); | |
506 | } | |
507 | #endif | |
508 | ||
c56c65fb TT |
509 | return 0; |
510 | } | |
511 | ||
512 | static struct rdma_cm_id * | |
513 | rpcrdma_create_id(struct rpcrdma_xprt *xprt, | |
514 | struct rpcrdma_ia *ia, struct sockaddr *addr) | |
515 | { | |
516 | struct rdma_cm_id *id; | |
517 | int rc; | |
518 | ||
1a954051 TT |
519 | init_completion(&ia->ri_done); |
520 | ||
b26f9b99 | 521 | id = rdma_create_id(rpcrdma_conn_upcall, xprt, RDMA_PS_TCP, IB_QPT_RC); |
c56c65fb TT |
522 | if (IS_ERR(id)) { |
523 | rc = PTR_ERR(id); | |
524 | dprintk("RPC: %s: rdma_create_id() failed %i\n", | |
525 | __func__, rc); | |
526 | return id; | |
527 | } | |
528 | ||
5675add3 | 529 | ia->ri_async_rc = -ETIMEDOUT; |
c56c65fb TT |
530 | rc = rdma_resolve_addr(id, NULL, addr, RDMA_RESOLVE_TIMEOUT); |
531 | if (rc) { | |
532 | dprintk("RPC: %s: rdma_resolve_addr() failed %i\n", | |
533 | __func__, rc); | |
534 | goto out; | |
535 | } | |
5675add3 TT |
536 | wait_for_completion_interruptible_timeout(&ia->ri_done, |
537 | msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT) + 1); | |
c56c65fb TT |
538 | rc = ia->ri_async_rc; |
539 | if (rc) | |
540 | goto out; | |
541 | ||
5675add3 | 542 | ia->ri_async_rc = -ETIMEDOUT; |
c56c65fb TT |
543 | rc = rdma_resolve_route(id, RDMA_RESOLVE_TIMEOUT); |
544 | if (rc) { | |
545 | dprintk("RPC: %s: rdma_resolve_route() failed %i\n", | |
546 | __func__, rc); | |
547 | goto out; | |
548 | } | |
5675add3 TT |
549 | wait_for_completion_interruptible_timeout(&ia->ri_done, |
550 | msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT) + 1); | |
c56c65fb TT |
551 | rc = ia->ri_async_rc; |
552 | if (rc) | |
553 | goto out; | |
554 | ||
555 | return id; | |
556 | ||
557 | out: | |
558 | rdma_destroy_id(id); | |
559 | return ERR_PTR(rc); | |
560 | } | |
561 | ||
562 | /* | |
563 | * Drain any cq, prior to teardown. | |
564 | */ | |
565 | static void | |
566 | rpcrdma_clean_cq(struct ib_cq *cq) | |
567 | { | |
568 | struct ib_wc wc; | |
569 | int count = 0; | |
570 | ||
571 | while (1 == ib_poll_cq(cq, 1, &wc)) | |
572 | ++count; | |
573 | ||
574 | if (count) | |
575 | dprintk("RPC: %s: flushed %d events (last 0x%x)\n", | |
576 | __func__, count, wc.opcode); | |
577 | } | |
578 | ||
579 | /* | |
580 | * Exported functions. | |
581 | */ | |
582 | ||
583 | /* | |
584 | * Open and initialize an Interface Adapter. | |
585 | * o initializes fields of struct rpcrdma_ia, including | |
586 | * interface and provider attributes and protection zone. | |
587 | */ | |
588 | int | |
589 | rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) | |
590 | { | |
bd7ed1d1 | 591 | int rc, mem_priv; |
c56c65fb | 592 | struct rpcrdma_ia *ia = &xprt->rx_ia; |
7bc7972c | 593 | struct ib_device_attr *devattr = &ia->ri_devattr; |
c56c65fb | 594 | |
c56c65fb TT |
595 | ia->ri_id = rpcrdma_create_id(xprt, ia, addr); |
596 | if (IS_ERR(ia->ri_id)) { | |
597 | rc = PTR_ERR(ia->ri_id); | |
598 | goto out1; | |
599 | } | |
600 | ||
601 | ia->ri_pd = ib_alloc_pd(ia->ri_id->device); | |
602 | if (IS_ERR(ia->ri_pd)) { | |
603 | rc = PTR_ERR(ia->ri_pd); | |
604 | dprintk("RPC: %s: ib_alloc_pd() failed %i\n", | |
605 | __func__, rc); | |
606 | goto out2; | |
607 | } | |
608 | ||
7bc7972c | 609 | rc = ib_query_device(ia->ri_id->device, devattr); |
bd7ed1d1 TT |
610 | if (rc) { |
611 | dprintk("RPC: %s: ib_query_device failed %d\n", | |
612 | __func__, rc); | |
5ae711a2 | 613 | goto out3; |
bd7ed1d1 TT |
614 | } |
615 | ||
7bc7972c | 616 | if (devattr->device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY) { |
bd7ed1d1 TT |
617 | ia->ri_have_dma_lkey = 1; |
618 | ia->ri_dma_lkey = ia->ri_id->device->local_dma_lkey; | |
619 | } | |
620 | ||
f10eafd3 | 621 | if (memreg == RPCRDMA_FRMR) { |
3197d309 | 622 | /* Requires both frmr reg and local dma lkey */ |
7bc7972c | 623 | if ((devattr->device_cap_flags & |
3197d309 TT |
624 | (IB_DEVICE_MEM_MGT_EXTENSIONS|IB_DEVICE_LOCAL_DMA_LKEY)) != |
625 | (IB_DEVICE_MEM_MGT_EXTENSIONS|IB_DEVICE_LOCAL_DMA_LKEY)) { | |
3197d309 | 626 | dprintk("RPC: %s: FRMR registration " |
f10eafd3 CL |
627 | "not supported by HCA\n", __func__); |
628 | memreg = RPCRDMA_MTHCAFMR; | |
0fc6c4e7 SW |
629 | } else { |
630 | /* Mind the ia limit on FRMR page list depth */ | |
631 | ia->ri_max_frmr_depth = min_t(unsigned int, | |
632 | RPCRDMA_MAX_DATA_SEGS, | |
7bc7972c | 633 | devattr->max_fast_reg_page_list_len); |
bd7ed1d1 | 634 | } |
f10eafd3 CL |
635 | } |
636 | if (memreg == RPCRDMA_MTHCAFMR) { | |
637 | if (!ia->ri_id->device->alloc_fmr) { | |
638 | dprintk("RPC: %s: MTHCAFMR registration " | |
639 | "not supported by HCA\n", __func__); | |
f10eafd3 | 640 | memreg = RPCRDMA_ALLPHYSICAL; |
f10eafd3 | 641 | } |
bd7ed1d1 TT |
642 | } |
643 | ||
c56c65fb TT |
644 | /* |
645 | * Optionally obtain an underlying physical identity mapping in | |
646 | * order to do a memory window-based bind. This base registration | |
647 | * is protected from remote access - that is enabled only by binding | |
648 | * for the specific bytes targeted during each RPC operation, and | |
649 | * revoked after the corresponding completion similar to a storage | |
650 | * adapter. | |
651 | */ | |
bd7ed1d1 | 652 | switch (memreg) { |
3197d309 | 653 | case RPCRDMA_FRMR: |
bd7ed1d1 | 654 | break; |
bd7ed1d1 TT |
655 | case RPCRDMA_ALLPHYSICAL: |
656 | mem_priv = IB_ACCESS_LOCAL_WRITE | | |
657 | IB_ACCESS_REMOTE_WRITE | | |
658 | IB_ACCESS_REMOTE_READ; | |
659 | goto register_setup; | |
bd7ed1d1 TT |
660 | case RPCRDMA_MTHCAFMR: |
661 | if (ia->ri_have_dma_lkey) | |
c56c65fb | 662 | break; |
bd7ed1d1 TT |
663 | mem_priv = IB_ACCESS_LOCAL_WRITE; |
664 | register_setup: | |
c56c65fb TT |
665 | ia->ri_bind_mem = ib_get_dma_mr(ia->ri_pd, mem_priv); |
666 | if (IS_ERR(ia->ri_bind_mem)) { | |
667 | printk(KERN_ALERT "%s: ib_get_dma_mr for " | |
0ac531c1 | 668 | "phys register failed with %lX\n", |
c56c65fb | 669 | __func__, PTR_ERR(ia->ri_bind_mem)); |
0ac531c1 | 670 | rc = -ENOMEM; |
5ae711a2 | 671 | goto out3; |
c56c65fb | 672 | } |
bd7ed1d1 TT |
673 | break; |
674 | default: | |
cdd9ade7 CL |
675 | printk(KERN_ERR "RPC: Unsupported memory " |
676 | "registration mode: %d\n", memreg); | |
677 | rc = -ENOMEM; | |
5ae711a2 | 678 | goto out3; |
c56c65fb | 679 | } |
bd7ed1d1 TT |
680 | dprintk("RPC: %s: memory registration strategy is %d\n", |
681 | __func__, memreg); | |
c56c65fb TT |
682 | |
683 | /* Else will do memory reg/dereg for each chunk */ | |
684 | ia->ri_memreg_strategy = memreg; | |
685 | ||
73806c88 | 686 | rwlock_init(&ia->ri_qplock); |
c56c65fb | 687 | return 0; |
5ae711a2 CL |
688 | |
689 | out3: | |
690 | ib_dealloc_pd(ia->ri_pd); | |
691 | ia->ri_pd = NULL; | |
c56c65fb TT |
692 | out2: |
693 | rdma_destroy_id(ia->ri_id); | |
fee08caf | 694 | ia->ri_id = NULL; |
c56c65fb TT |
695 | out1: |
696 | return rc; | |
697 | } | |
698 | ||
699 | /* | |
700 | * Clean up/close an IA. | |
701 | * o if event handles and PD have been initialized, free them. | |
702 | * o close the IA | |
703 | */ | |
704 | void | |
705 | rpcrdma_ia_close(struct rpcrdma_ia *ia) | |
706 | { | |
707 | int rc; | |
708 | ||
709 | dprintk("RPC: %s: entering\n", __func__); | |
710 | if (ia->ri_bind_mem != NULL) { | |
711 | rc = ib_dereg_mr(ia->ri_bind_mem); | |
712 | dprintk("RPC: %s: ib_dereg_mr returned %i\n", | |
713 | __func__, rc); | |
714 | } | |
fee08caf TT |
715 | if (ia->ri_id != NULL && !IS_ERR(ia->ri_id)) { |
716 | if (ia->ri_id->qp) | |
717 | rdma_destroy_qp(ia->ri_id); | |
718 | rdma_destroy_id(ia->ri_id); | |
719 | ia->ri_id = NULL; | |
720 | } | |
c56c65fb TT |
721 | if (ia->ri_pd != NULL && !IS_ERR(ia->ri_pd)) { |
722 | rc = ib_dealloc_pd(ia->ri_pd); | |
723 | dprintk("RPC: %s: ib_dealloc_pd returned %i\n", | |
724 | __func__, rc); | |
725 | } | |
c56c65fb TT |
726 | } |
727 | ||
728 | /* | |
729 | * Create unconnected endpoint. | |
730 | */ | |
731 | int | |
732 | rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, | |
733 | struct rpcrdma_create_data_internal *cdata) | |
734 | { | |
7bc7972c | 735 | struct ib_device_attr *devattr = &ia->ri_devattr; |
fc664485 | 736 | struct ib_cq *sendcq, *recvcq; |
5d40a8a5 | 737 | int rc, err; |
c56c65fb | 738 | |
c56c65fb | 739 | /* check provider's send/recv wr limits */ |
7bc7972c CL |
740 | if (cdata->max_requests > devattr->max_qp_wr) |
741 | cdata->max_requests = devattr->max_qp_wr; | |
c56c65fb TT |
742 | |
743 | ep->rep_attr.event_handler = rpcrdma_qp_async_error_upcall; | |
744 | ep->rep_attr.qp_context = ep; | |
745 | /* send_cq and recv_cq initialized below */ | |
746 | ep->rep_attr.srq = NULL; | |
747 | ep->rep_attr.cap.max_send_wr = cdata->max_requests; | |
748 | switch (ia->ri_memreg_strategy) { | |
0fc6c4e7 SW |
749 | case RPCRDMA_FRMR: { |
750 | int depth = 7; | |
751 | ||
15cdc644 TT |
752 | /* Add room for frmr register and invalidate WRs. |
753 | * 1. FRMR reg WR for head | |
754 | * 2. FRMR invalidate WR for head | |
0fc6c4e7 SW |
755 | * 3. N FRMR reg WRs for pagelist |
756 | * 4. N FRMR invalidate WRs for pagelist | |
15cdc644 TT |
757 | * 5. FRMR reg WR for tail |
758 | * 6. FRMR invalidate WR for tail | |
759 | * 7. The RDMA_SEND WR | |
760 | */ | |
0fc6c4e7 SW |
761 | |
762 | /* Calculate N if the device max FRMR depth is smaller than | |
763 | * RPCRDMA_MAX_DATA_SEGS. | |
764 | */ | |
765 | if (ia->ri_max_frmr_depth < RPCRDMA_MAX_DATA_SEGS) { | |
766 | int delta = RPCRDMA_MAX_DATA_SEGS - | |
767 | ia->ri_max_frmr_depth; | |
768 | ||
769 | do { | |
770 | depth += 2; /* FRMR reg + invalidate */ | |
771 | delta -= ia->ri_max_frmr_depth; | |
772 | } while (delta > 0); | |
773 | ||
774 | } | |
775 | ep->rep_attr.cap.max_send_wr *= depth; | |
7bc7972c CL |
776 | if (ep->rep_attr.cap.max_send_wr > devattr->max_qp_wr) { |
777 | cdata->max_requests = devattr->max_qp_wr / depth; | |
15cdc644 TT |
778 | if (!cdata->max_requests) |
779 | return -EINVAL; | |
0fc6c4e7 SW |
780 | ep->rep_attr.cap.max_send_wr = cdata->max_requests * |
781 | depth; | |
15cdc644 | 782 | } |
3197d309 | 783 | break; |
0fc6c4e7 | 784 | } |
c56c65fb TT |
785 | default: |
786 | break; | |
787 | } | |
788 | ep->rep_attr.cap.max_recv_wr = cdata->max_requests; | |
789 | ep->rep_attr.cap.max_send_sge = (cdata->padding ? 4 : 2); | |
790 | ep->rep_attr.cap.max_recv_sge = 1; | |
791 | ep->rep_attr.cap.max_inline_data = 0; | |
792 | ep->rep_attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
793 | ep->rep_attr.qp_type = IB_QPT_RC; | |
794 | ep->rep_attr.port_num = ~0; | |
795 | ||
796 | dprintk("RPC: %s: requested max: dtos: send %d recv %d; " | |
797 | "iovs: send %d recv %d\n", | |
798 | __func__, | |
799 | ep->rep_attr.cap.max_send_wr, | |
800 | ep->rep_attr.cap.max_recv_wr, | |
801 | ep->rep_attr.cap.max_send_sge, | |
802 | ep->rep_attr.cap.max_recv_sge); | |
803 | ||
804 | /* set trigger for requesting send completion */ | |
fc664485 | 805 | ep->rep_cqinit = ep->rep_attr.cap.max_send_wr/2 - 1; |
e7104a2a CL |
806 | if (ep->rep_cqinit > RPCRDMA_MAX_UNSIGNALED_SENDS) |
807 | ep->rep_cqinit = RPCRDMA_MAX_UNSIGNALED_SENDS; | |
808 | else if (ep->rep_cqinit <= 2) | |
c56c65fb TT |
809 | ep->rep_cqinit = 0; |
810 | INIT_CQCOUNT(ep); | |
c56c65fb | 811 | init_waitqueue_head(&ep->rep_connect_wait); |
254f91e2 | 812 | INIT_DELAYED_WORK(&ep->rep_connect_worker, rpcrdma_connect_worker); |
c56c65fb | 813 | |
fc664485 | 814 | sendcq = ib_create_cq(ia->ri_id->device, rpcrdma_sendcq_upcall, |
1c00dd07 | 815 | rpcrdma_cq_async_error_upcall, ep, |
c56c65fb | 816 | ep->rep_attr.cap.max_send_wr + 1, 0); |
fc664485 CL |
817 | if (IS_ERR(sendcq)) { |
818 | rc = PTR_ERR(sendcq); | |
819 | dprintk("RPC: %s: failed to create send CQ: %i\n", | |
c56c65fb TT |
820 | __func__, rc); |
821 | goto out1; | |
822 | } | |
823 | ||
fc664485 | 824 | rc = ib_req_notify_cq(sendcq, IB_CQ_NEXT_COMP); |
c56c65fb TT |
825 | if (rc) { |
826 | dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", | |
827 | __func__, rc); | |
828 | goto out2; | |
829 | } | |
830 | ||
fc664485 | 831 | recvcq = ib_create_cq(ia->ri_id->device, rpcrdma_recvcq_upcall, |
1c00dd07 | 832 | rpcrdma_cq_async_error_upcall, ep, |
fc664485 CL |
833 | ep->rep_attr.cap.max_recv_wr + 1, 0); |
834 | if (IS_ERR(recvcq)) { | |
835 | rc = PTR_ERR(recvcq); | |
836 | dprintk("RPC: %s: failed to create recv CQ: %i\n", | |
837 | __func__, rc); | |
838 | goto out2; | |
839 | } | |
840 | ||
841 | rc = ib_req_notify_cq(recvcq, IB_CQ_NEXT_COMP); | |
842 | if (rc) { | |
843 | dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", | |
844 | __func__, rc); | |
845 | ib_destroy_cq(recvcq); | |
846 | goto out2; | |
847 | } | |
848 | ||
849 | ep->rep_attr.send_cq = sendcq; | |
850 | ep->rep_attr.recv_cq = recvcq; | |
c56c65fb TT |
851 | |
852 | /* Initialize cma parameters */ | |
853 | ||
854 | /* RPC/RDMA does not use private data */ | |
855 | ep->rep_remote_cma.private_data = NULL; | |
856 | ep->rep_remote_cma.private_data_len = 0; | |
857 | ||
858 | /* Client offers RDMA Read but does not initiate */ | |
b334eaab | 859 | ep->rep_remote_cma.initiator_depth = 0; |
7bc7972c | 860 | if (devattr->max_qp_rd_atom > 32) /* arbitrary but <= 255 */ |
b334eaab TT |
861 | ep->rep_remote_cma.responder_resources = 32; |
862 | else | |
7bc7972c CL |
863 | ep->rep_remote_cma.responder_resources = |
864 | devattr->max_qp_rd_atom; | |
c56c65fb TT |
865 | |
866 | ep->rep_remote_cma.retry_count = 7; | |
867 | ep->rep_remote_cma.flow_control = 0; | |
868 | ep->rep_remote_cma.rnr_retry_count = 0; | |
869 | ||
870 | return 0; | |
871 | ||
872 | out2: | |
fc664485 | 873 | err = ib_destroy_cq(sendcq); |
5d40a8a5 CL |
874 | if (err) |
875 | dprintk("RPC: %s: ib_destroy_cq returned %i\n", | |
876 | __func__, err); | |
c56c65fb TT |
877 | out1: |
878 | return rc; | |
879 | } | |
880 | ||
881 | /* | |
882 | * rpcrdma_ep_destroy | |
883 | * | |
884 | * Disconnect and destroy endpoint. After this, the only | |
885 | * valid operations on the ep are to free it (if dynamically | |
886 | * allocated) or re-create it. | |
c56c65fb | 887 | */ |
7f1d5419 | 888 | void |
c56c65fb TT |
889 | rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) |
890 | { | |
891 | int rc; | |
892 | ||
893 | dprintk("RPC: %s: entering, connected is %d\n", | |
894 | __func__, ep->rep_connected); | |
895 | ||
254f91e2 CL |
896 | cancel_delayed_work_sync(&ep->rep_connect_worker); |
897 | ||
c56c65fb | 898 | if (ia->ri_id->qp) { |
282191cb | 899 | rpcrdma_ep_disconnect(ep, ia); |
fee08caf TT |
900 | rdma_destroy_qp(ia->ri_id); |
901 | ia->ri_id->qp = NULL; | |
c56c65fb TT |
902 | } |
903 | ||
c56c65fb TT |
904 | /* padding - could be done in rpcrdma_buffer_destroy... */ |
905 | if (ep->rep_pad_mr) { | |
906 | rpcrdma_deregister_internal(ia, ep->rep_pad_mr, &ep->rep_pad); | |
907 | ep->rep_pad_mr = NULL; | |
908 | } | |
909 | ||
fc664485 CL |
910 | rpcrdma_clean_cq(ep->rep_attr.recv_cq); |
911 | rc = ib_destroy_cq(ep->rep_attr.recv_cq); | |
912 | if (rc) | |
913 | dprintk("RPC: %s: ib_destroy_cq returned %i\n", | |
914 | __func__, rc); | |
915 | ||
916 | rpcrdma_clean_cq(ep->rep_attr.send_cq); | |
917 | rc = ib_destroy_cq(ep->rep_attr.send_cq); | |
c56c65fb TT |
918 | if (rc) |
919 | dprintk("RPC: %s: ib_destroy_cq returned %i\n", | |
920 | __func__, rc); | |
c56c65fb TT |
921 | } |
922 | ||
923 | /* | |
924 | * Connect unconnected endpoint. | |
925 | */ | |
926 | int | |
927 | rpcrdma_ep_connect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) | |
928 | { | |
73806c88 | 929 | struct rdma_cm_id *id, *old; |
c56c65fb TT |
930 | int rc = 0; |
931 | int retry_count = 0; | |
c56c65fb | 932 | |
c055551e | 933 | if (ep->rep_connected != 0) { |
c56c65fb TT |
934 | struct rpcrdma_xprt *xprt; |
935 | retry: | |
ec62f40d | 936 | dprintk("RPC: %s: reconnecting...\n", __func__); |
282191cb CL |
937 | |
938 | rpcrdma_ep_disconnect(ep, ia); | |
a7bc211a | 939 | rpcrdma_flush_cqs(ep); |
c56c65fb | 940 | |
467c9674 CL |
941 | switch (ia->ri_memreg_strategy) { |
942 | case RPCRDMA_FRMR: | |
9f9d802a | 943 | rpcrdma_reset_frmrs(ia); |
467c9674 CL |
944 | break; |
945 | case RPCRDMA_MTHCAFMR: | |
946 | rpcrdma_reset_fmrs(ia); | |
947 | break; | |
948 | case RPCRDMA_ALLPHYSICAL: | |
949 | break; | |
950 | default: | |
951 | rc = -EIO; | |
952 | goto out; | |
953 | } | |
9f9d802a | 954 | |
c56c65fb TT |
955 | xprt = container_of(ia, struct rpcrdma_xprt, rx_ia); |
956 | id = rpcrdma_create_id(xprt, ia, | |
957 | (struct sockaddr *)&xprt->rx_data.addr); | |
958 | if (IS_ERR(id)) { | |
ec62f40d | 959 | rc = -EHOSTUNREACH; |
c56c65fb TT |
960 | goto out; |
961 | } | |
962 | /* TEMP TEMP TEMP - fail if new device: | |
963 | * Deregister/remarshal *all* requests! | |
964 | * Close and recreate adapter, pd, etc! | |
965 | * Re-determine all attributes still sane! | |
966 | * More stuff I haven't thought of! | |
967 | * Rrrgh! | |
968 | */ | |
969 | if (ia->ri_id->device != id->device) { | |
970 | printk("RPC: %s: can't reconnect on " | |
971 | "different device!\n", __func__); | |
972 | rdma_destroy_id(id); | |
ec62f40d | 973 | rc = -ENETUNREACH; |
c56c65fb TT |
974 | goto out; |
975 | } | |
976 | /* END TEMP */ | |
ec62f40d CL |
977 | rc = rdma_create_qp(id, ia->ri_pd, &ep->rep_attr); |
978 | if (rc) { | |
979 | dprintk("RPC: %s: rdma_create_qp failed %i\n", | |
980 | __func__, rc); | |
981 | rdma_destroy_id(id); | |
982 | rc = -ENETUNREACH; | |
983 | goto out; | |
984 | } | |
73806c88 CL |
985 | |
986 | write_lock(&ia->ri_qplock); | |
987 | old = ia->ri_id; | |
c56c65fb | 988 | ia->ri_id = id; |
73806c88 CL |
989 | write_unlock(&ia->ri_qplock); |
990 | ||
991 | rdma_destroy_qp(old); | |
992 | rdma_destroy_id(old); | |
ec62f40d CL |
993 | } else { |
994 | dprintk("RPC: %s: connecting...\n", __func__); | |
995 | rc = rdma_create_qp(ia->ri_id, ia->ri_pd, &ep->rep_attr); | |
996 | if (rc) { | |
997 | dprintk("RPC: %s: rdma_create_qp failed %i\n", | |
998 | __func__, rc); | |
999 | /* do not update ep->rep_connected */ | |
1000 | return -ENETUNREACH; | |
1001 | } | |
c56c65fb TT |
1002 | } |
1003 | ||
c56c65fb TT |
1004 | ep->rep_connected = 0; |
1005 | ||
1006 | rc = rdma_connect(ia->ri_id, &ep->rep_remote_cma); | |
1007 | if (rc) { | |
1008 | dprintk("RPC: %s: rdma_connect() failed with %i\n", | |
1009 | __func__, rc); | |
1010 | goto out; | |
1011 | } | |
1012 | ||
c56c65fb TT |
1013 | wait_event_interruptible(ep->rep_connect_wait, ep->rep_connected != 0); |
1014 | ||
1015 | /* | |
1016 | * Check state. A non-peer reject indicates no listener | |
1017 | * (ECONNREFUSED), which may be a transient state. All | |
1018 | * others indicate a transport condition which has already | |
1019 | * undergone a best-effort. | |
1020 | */ | |
f64f9e71 JP |
1021 | if (ep->rep_connected == -ECONNREFUSED && |
1022 | ++retry_count <= RDMA_CONNECT_RETRY_MAX) { | |
c56c65fb TT |
1023 | dprintk("RPC: %s: non-peer_reject, retry\n", __func__); |
1024 | goto retry; | |
1025 | } | |
1026 | if (ep->rep_connected <= 0) { | |
1027 | /* Sometimes, the only way to reliably connect to remote | |
1028 | * CMs is to use same nonzero values for ORD and IRD. */ | |
b334eaab TT |
1029 | if (retry_count++ <= RDMA_CONNECT_RETRY_MAX + 1 && |
1030 | (ep->rep_remote_cma.responder_resources == 0 || | |
1031 | ep->rep_remote_cma.initiator_depth != | |
1032 | ep->rep_remote_cma.responder_resources)) { | |
1033 | if (ep->rep_remote_cma.responder_resources == 0) | |
1034 | ep->rep_remote_cma.responder_resources = 1; | |
1035 | ep->rep_remote_cma.initiator_depth = | |
1036 | ep->rep_remote_cma.responder_resources; | |
c56c65fb | 1037 | goto retry; |
b334eaab | 1038 | } |
c56c65fb TT |
1039 | rc = ep->rep_connected; |
1040 | } else { | |
1041 | dprintk("RPC: %s: connected\n", __func__); | |
1042 | } | |
1043 | ||
1044 | out: | |
1045 | if (rc) | |
1046 | ep->rep_connected = rc; | |
1047 | return rc; | |
1048 | } | |
1049 | ||
1050 | /* | |
1051 | * rpcrdma_ep_disconnect | |
1052 | * | |
1053 | * This is separate from destroy to facilitate the ability | |
1054 | * to reconnect without recreating the endpoint. | |
1055 | * | |
1056 | * This call is not reentrant, and must not be made in parallel | |
1057 | * on the same endpoint. | |
1058 | */ | |
282191cb | 1059 | void |
c56c65fb TT |
1060 | rpcrdma_ep_disconnect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) |
1061 | { | |
1062 | int rc; | |
1063 | ||
a7bc211a | 1064 | rpcrdma_flush_cqs(ep); |
c56c65fb TT |
1065 | rc = rdma_disconnect(ia->ri_id); |
1066 | if (!rc) { | |
1067 | /* returns without wait if not connected */ | |
1068 | wait_event_interruptible(ep->rep_connect_wait, | |
1069 | ep->rep_connected != 1); | |
1070 | dprintk("RPC: %s: after wait, %sconnected\n", __func__, | |
1071 | (ep->rep_connected == 1) ? "still " : "dis"); | |
1072 | } else { | |
1073 | dprintk("RPC: %s: rdma_disconnect %i\n", __func__, rc); | |
1074 | ep->rep_connected = rc; | |
1075 | } | |
c56c65fb TT |
1076 | } |
1077 | ||
1392402c CL |
1078 | static struct rpcrdma_req * |
1079 | rpcrdma_create_req(struct rpcrdma_xprt *r_xprt) | |
1080 | { | |
1081 | struct rpcrdma_create_data_internal *cdata = &r_xprt->rx_data; | |
1082 | size_t wlen = 1 << fls(cdata->inline_wsize + | |
1083 | sizeof(struct rpcrdma_req)); | |
1084 | struct rpcrdma_ia *ia = &r_xprt->rx_ia; | |
1085 | struct rpcrdma_req *req; | |
1086 | int rc; | |
1087 | ||
1088 | rc = -ENOMEM; | |
1089 | req = kmalloc(wlen, GFP_KERNEL); | |
1090 | if (req == NULL) | |
1091 | goto out; | |
1092 | memset(req, 0, sizeof(struct rpcrdma_req)); | |
1093 | ||
1094 | rc = rpcrdma_register_internal(ia, req->rl_base, wlen - | |
1095 | offsetof(struct rpcrdma_req, rl_base), | |
1096 | &req->rl_handle, &req->rl_iov); | |
1097 | if (rc) | |
1098 | goto out_free; | |
1099 | ||
1100 | req->rl_size = wlen - sizeof(struct rpcrdma_req); | |
1101 | req->rl_buffer = &r_xprt->rx_buf; | |
1102 | return req; | |
1103 | ||
1104 | out_free: | |
1105 | kfree(req); | |
1106 | out: | |
1107 | return ERR_PTR(rc); | |
1108 | } | |
1109 | ||
1110 | static struct rpcrdma_rep * | |
1111 | rpcrdma_create_rep(struct rpcrdma_xprt *r_xprt) | |
1112 | { | |
1113 | struct rpcrdma_create_data_internal *cdata = &r_xprt->rx_data; | |
1114 | size_t rlen = 1 << fls(cdata->inline_rsize + | |
1115 | sizeof(struct rpcrdma_rep)); | |
1116 | struct rpcrdma_ia *ia = &r_xprt->rx_ia; | |
1117 | struct rpcrdma_rep *rep; | |
1118 | int rc; | |
1119 | ||
1120 | rc = -ENOMEM; | |
1121 | rep = kmalloc(rlen, GFP_KERNEL); | |
1122 | if (rep == NULL) | |
1123 | goto out; | |
1124 | memset(rep, 0, sizeof(struct rpcrdma_rep)); | |
1125 | ||
1126 | rc = rpcrdma_register_internal(ia, rep->rr_base, rlen - | |
1127 | offsetof(struct rpcrdma_rep, rr_base), | |
1128 | &rep->rr_handle, &rep->rr_iov); | |
1129 | if (rc) | |
1130 | goto out_free; | |
1131 | ||
1132 | rep->rr_buffer = &r_xprt->rx_buf; | |
1133 | return rep; | |
1134 | ||
1135 | out_free: | |
1136 | kfree(rep); | |
1137 | out: | |
1138 | return ERR_PTR(rc); | |
1139 | } | |
1140 | ||
2e84522c CL |
1141 | static int |
1142 | rpcrdma_init_fmrs(struct rpcrdma_ia *ia, struct rpcrdma_buffer *buf) | |
1143 | { | |
1144 | int mr_access_flags = IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ; | |
1145 | struct ib_fmr_attr fmr_attr = { | |
1146 | .max_pages = RPCRDMA_MAX_DATA_SEGS, | |
1147 | .max_maps = 1, | |
1148 | .page_shift = PAGE_SHIFT | |
1149 | }; | |
1150 | struct rpcrdma_mw *r; | |
1151 | int i, rc; | |
1152 | ||
1153 | i = (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS; | |
1154 | dprintk("RPC: %s: initalizing %d FMRs\n", __func__, i); | |
1155 | ||
1156 | while (i--) { | |
1157 | r = kzalloc(sizeof(*r), GFP_KERNEL); | |
1158 | if (r == NULL) | |
1159 | return -ENOMEM; | |
1160 | ||
1161 | r->r.fmr = ib_alloc_fmr(ia->ri_pd, mr_access_flags, &fmr_attr); | |
1162 | if (IS_ERR(r->r.fmr)) { | |
1163 | rc = PTR_ERR(r->r.fmr); | |
1164 | dprintk("RPC: %s: ib_alloc_fmr failed %i\n", | |
1165 | __func__, rc); | |
1166 | goto out_free; | |
1167 | } | |
1168 | ||
1169 | list_add(&r->mw_list, &buf->rb_mws); | |
1170 | list_add(&r->mw_all, &buf->rb_all); | |
1171 | } | |
1172 | return 0; | |
1173 | ||
1174 | out_free: | |
1175 | kfree(r); | |
1176 | return rc; | |
1177 | } | |
1178 | ||
1179 | static int | |
1180 | rpcrdma_init_frmrs(struct rpcrdma_ia *ia, struct rpcrdma_buffer *buf) | |
1181 | { | |
1182 | struct rpcrdma_frmr *f; | |
1183 | struct rpcrdma_mw *r; | |
1184 | int i, rc; | |
1185 | ||
1186 | i = (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS; | |
1187 | dprintk("RPC: %s: initalizing %d FRMRs\n", __func__, i); | |
1188 | ||
1189 | while (i--) { | |
1190 | r = kzalloc(sizeof(*r), GFP_KERNEL); | |
1191 | if (r == NULL) | |
1192 | return -ENOMEM; | |
1193 | f = &r->r.frmr; | |
1194 | ||
1195 | f->fr_mr = ib_alloc_fast_reg_mr(ia->ri_pd, | |
1196 | ia->ri_max_frmr_depth); | |
1197 | if (IS_ERR(f->fr_mr)) { | |
1198 | rc = PTR_ERR(f->fr_mr); | |
1199 | dprintk("RPC: %s: ib_alloc_fast_reg_mr " | |
1200 | "failed %i\n", __func__, rc); | |
1201 | goto out_free; | |
1202 | } | |
1203 | ||
1204 | f->fr_pgl = ib_alloc_fast_reg_page_list(ia->ri_id->device, | |
1205 | ia->ri_max_frmr_depth); | |
1206 | if (IS_ERR(f->fr_pgl)) { | |
1207 | rc = PTR_ERR(f->fr_pgl); | |
1208 | dprintk("RPC: %s: ib_alloc_fast_reg_page_list " | |
1209 | "failed %i\n", __func__, rc); | |
1210 | ||
1211 | ib_dereg_mr(f->fr_mr); | |
1212 | goto out_free; | |
1213 | } | |
1214 | ||
1215 | list_add(&r->mw_list, &buf->rb_mws); | |
1216 | list_add(&r->mw_all, &buf->rb_all); | |
1217 | } | |
1218 | ||
1219 | return 0; | |
1220 | ||
1221 | out_free: | |
1222 | kfree(r); | |
1223 | return rc; | |
1224 | } | |
1225 | ||
c56c65fb | 1226 | int |
ac920d04 | 1227 | rpcrdma_buffer_create(struct rpcrdma_xprt *r_xprt) |
c56c65fb | 1228 | { |
ac920d04 CL |
1229 | struct rpcrdma_buffer *buf = &r_xprt->rx_buf; |
1230 | struct rpcrdma_ia *ia = &r_xprt->rx_ia; | |
1231 | struct rpcrdma_create_data_internal *cdata = &r_xprt->rx_data; | |
c56c65fb | 1232 | char *p; |
1392402c | 1233 | size_t len; |
c56c65fb TT |
1234 | int i, rc; |
1235 | ||
1236 | buf->rb_max_requests = cdata->max_requests; | |
1237 | spin_lock_init(&buf->rb_lock); | |
c56c65fb TT |
1238 | |
1239 | /* Need to allocate: | |
1240 | * 1. arrays for send and recv pointers | |
1241 | * 2. arrays of struct rpcrdma_req to fill in pointers | |
1242 | * 3. array of struct rpcrdma_rep for replies | |
1243 | * 4. padding, if any | |
c56c65fb TT |
1244 | * Send/recv buffers in req/rep need to be registered |
1245 | */ | |
c56c65fb TT |
1246 | len = buf->rb_max_requests * |
1247 | (sizeof(struct rpcrdma_req *) + sizeof(struct rpcrdma_rep *)); | |
1248 | len += cdata->padding; | |
c56c65fb | 1249 | |
c56c65fb TT |
1250 | p = kzalloc(len, GFP_KERNEL); |
1251 | if (p == NULL) { | |
1252 | dprintk("RPC: %s: req_t/rep_t/pad kzalloc(%zd) failed\n", | |
1253 | __func__, len); | |
1254 | rc = -ENOMEM; | |
1255 | goto out; | |
1256 | } | |
1257 | buf->rb_pool = p; /* for freeing it later */ | |
1258 | ||
1259 | buf->rb_send_bufs = (struct rpcrdma_req **) p; | |
1260 | p = (char *) &buf->rb_send_bufs[buf->rb_max_requests]; | |
1261 | buf->rb_recv_bufs = (struct rpcrdma_rep **) p; | |
1262 | p = (char *) &buf->rb_recv_bufs[buf->rb_max_requests]; | |
1263 | ||
1264 | /* | |
1265 | * Register the zeroed pad buffer, if any. | |
1266 | */ | |
1267 | if (cdata->padding) { | |
ac920d04 | 1268 | struct rpcrdma_ep *ep = &r_xprt->rx_ep; |
c56c65fb TT |
1269 | rc = rpcrdma_register_internal(ia, p, cdata->padding, |
1270 | &ep->rep_pad_mr, &ep->rep_pad); | |
1271 | if (rc) | |
1272 | goto out; | |
1273 | } | |
1274 | p += cdata->padding; | |
1275 | ||
c56c65fb | 1276 | INIT_LIST_HEAD(&buf->rb_mws); |
3111d72c | 1277 | INIT_LIST_HEAD(&buf->rb_all); |
c56c65fb | 1278 | switch (ia->ri_memreg_strategy) { |
3197d309 | 1279 | case RPCRDMA_FRMR: |
2e84522c CL |
1280 | rc = rpcrdma_init_frmrs(ia, buf); |
1281 | if (rc) | |
1282 | goto out; | |
3197d309 | 1283 | break; |
c56c65fb | 1284 | case RPCRDMA_MTHCAFMR: |
2e84522c CL |
1285 | rc = rpcrdma_init_fmrs(ia, buf); |
1286 | if (rc) | |
1287 | goto out; | |
c56c65fb | 1288 | break; |
c56c65fb TT |
1289 | default: |
1290 | break; | |
1291 | } | |
1292 | ||
c56c65fb TT |
1293 | for (i = 0; i < buf->rb_max_requests; i++) { |
1294 | struct rpcrdma_req *req; | |
1295 | struct rpcrdma_rep *rep; | |
1296 | ||
1392402c CL |
1297 | req = rpcrdma_create_req(r_xprt); |
1298 | if (IS_ERR(req)) { | |
c56c65fb TT |
1299 | dprintk("RPC: %s: request buffer %d alloc" |
1300 | " failed\n", __func__, i); | |
1392402c | 1301 | rc = PTR_ERR(req); |
c56c65fb TT |
1302 | goto out; |
1303 | } | |
c56c65fb | 1304 | buf->rb_send_bufs[i] = req; |
c56c65fb | 1305 | |
1392402c CL |
1306 | rep = rpcrdma_create_rep(r_xprt); |
1307 | if (IS_ERR(rep)) { | |
c56c65fb TT |
1308 | dprintk("RPC: %s: reply buffer %d alloc failed\n", |
1309 | __func__, i); | |
1392402c | 1310 | rc = PTR_ERR(rep); |
c56c65fb TT |
1311 | goto out; |
1312 | } | |
c56c65fb | 1313 | buf->rb_recv_bufs[i] = rep; |
c56c65fb | 1314 | } |
1392402c | 1315 | |
c56c65fb TT |
1316 | return 0; |
1317 | out: | |
1318 | rpcrdma_buffer_destroy(buf); | |
1319 | return rc; | |
1320 | } | |
1321 | ||
1392402c CL |
1322 | static void |
1323 | rpcrdma_destroy_rep(struct rpcrdma_ia *ia, struct rpcrdma_rep *rep) | |
1324 | { | |
1325 | if (!rep) | |
1326 | return; | |
1327 | ||
1328 | rpcrdma_deregister_internal(ia, rep->rr_handle, &rep->rr_iov); | |
1329 | kfree(rep); | |
1330 | } | |
1331 | ||
1332 | static void | |
1333 | rpcrdma_destroy_req(struct rpcrdma_ia *ia, struct rpcrdma_req *req) | |
1334 | { | |
1335 | if (!req) | |
1336 | return; | |
1337 | ||
1338 | rpcrdma_deregister_internal(ia, req->rl_handle, &req->rl_iov); | |
1339 | kfree(req); | |
1340 | } | |
1341 | ||
2e84522c CL |
1342 | static void |
1343 | rpcrdma_destroy_fmrs(struct rpcrdma_buffer *buf) | |
1344 | { | |
1345 | struct rpcrdma_mw *r; | |
1346 | int rc; | |
1347 | ||
1348 | while (!list_empty(&buf->rb_all)) { | |
1349 | r = list_entry(buf->rb_all.next, struct rpcrdma_mw, mw_all); | |
1350 | list_del(&r->mw_all); | |
1351 | list_del(&r->mw_list); | |
1352 | ||
1353 | rc = ib_dealloc_fmr(r->r.fmr); | |
1354 | if (rc) | |
1355 | dprintk("RPC: %s: ib_dealloc_fmr failed %i\n", | |
1356 | __func__, rc); | |
1357 | ||
1358 | kfree(r); | |
1359 | } | |
1360 | } | |
1361 | ||
1362 | static void | |
1363 | rpcrdma_destroy_frmrs(struct rpcrdma_buffer *buf) | |
1364 | { | |
1365 | struct rpcrdma_mw *r; | |
1366 | int rc; | |
1367 | ||
1368 | while (!list_empty(&buf->rb_all)) { | |
1369 | r = list_entry(buf->rb_all.next, struct rpcrdma_mw, mw_all); | |
1370 | list_del(&r->mw_all); | |
1371 | list_del(&r->mw_list); | |
1372 | ||
1373 | rc = ib_dereg_mr(r->r.frmr.fr_mr); | |
1374 | if (rc) | |
1375 | dprintk("RPC: %s: ib_dereg_mr failed %i\n", | |
1376 | __func__, rc); | |
1377 | ib_free_fast_reg_page_list(r->r.frmr.fr_pgl); | |
1378 | ||
1379 | kfree(r); | |
1380 | } | |
1381 | } | |
1382 | ||
c56c65fb TT |
1383 | void |
1384 | rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf) | |
1385 | { | |
c56c65fb | 1386 | struct rpcrdma_ia *ia = rdmab_to_ia(buf); |
2e84522c | 1387 | int i; |
c56c65fb TT |
1388 | |
1389 | /* clean up in reverse order from create | |
1390 | * 1. recv mr memory (mr free, then kfree) | |
c56c65fb | 1391 | * 2. send mr memory (mr free, then kfree) |
2e84522c | 1392 | * 3. MWs |
c56c65fb TT |
1393 | */ |
1394 | dprintk("RPC: %s: entering\n", __func__); | |
1395 | ||
1396 | for (i = 0; i < buf->rb_max_requests; i++) { | |
1392402c CL |
1397 | if (buf->rb_recv_bufs) |
1398 | rpcrdma_destroy_rep(ia, buf->rb_recv_bufs[i]); | |
1399 | if (buf->rb_send_bufs) | |
1400 | rpcrdma_destroy_req(ia, buf->rb_send_bufs[i]); | |
c56c65fb TT |
1401 | } |
1402 | ||
2e84522c CL |
1403 | switch (ia->ri_memreg_strategy) { |
1404 | case RPCRDMA_FRMR: | |
1405 | rpcrdma_destroy_frmrs(buf); | |
1406 | break; | |
1407 | case RPCRDMA_MTHCAFMR: | |
1408 | rpcrdma_destroy_fmrs(buf); | |
1409 | break; | |
1410 | default: | |
1411 | break; | |
4034ba04 AA |
1412 | } |
1413 | ||
c56c65fb TT |
1414 | kfree(buf->rb_pool); |
1415 | } | |
1416 | ||
467c9674 CL |
1417 | /* After a disconnect, unmap all FMRs. |
1418 | * | |
1419 | * This is invoked only in the transport connect worker in order | |
1420 | * to serialize with rpcrdma_register_fmr_external(). | |
1421 | */ | |
1422 | static void | |
1423 | rpcrdma_reset_fmrs(struct rpcrdma_ia *ia) | |
1424 | { | |
1425 | struct rpcrdma_xprt *r_xprt = | |
1426 | container_of(ia, struct rpcrdma_xprt, rx_ia); | |
1427 | struct rpcrdma_buffer *buf = &r_xprt->rx_buf; | |
1428 | struct list_head *pos; | |
1429 | struct rpcrdma_mw *r; | |
1430 | LIST_HEAD(l); | |
1431 | int rc; | |
1432 | ||
1433 | list_for_each(pos, &buf->rb_all) { | |
1434 | r = list_entry(pos, struct rpcrdma_mw, mw_all); | |
1435 | ||
1436 | INIT_LIST_HEAD(&l); | |
1437 | list_add(&r->r.fmr->list, &l); | |
1438 | rc = ib_unmap_fmr(&l); | |
1439 | if (rc) | |
1440 | dprintk("RPC: %s: ib_unmap_fmr failed %i\n", | |
1441 | __func__, rc); | |
1442 | } | |
1443 | } | |
1444 | ||
9f9d802a CL |
1445 | /* After a disconnect, a flushed FAST_REG_MR can leave an FRMR in |
1446 | * an unusable state. Find FRMRs in this state and dereg / reg | |
1447 | * each. FRMRs that are VALID and attached to an rpcrdma_req are | |
1448 | * also torn down. | |
1449 | * | |
1450 | * This gives all in-use FRMRs a fresh rkey and leaves them INVALID. | |
1451 | * | |
1452 | * This is invoked only in the transport connect worker in order | |
1453 | * to serialize with rpcrdma_register_frmr_external(). | |
1454 | */ | |
1455 | static void | |
1456 | rpcrdma_reset_frmrs(struct rpcrdma_ia *ia) | |
1457 | { | |
1458 | struct rpcrdma_xprt *r_xprt = | |
1459 | container_of(ia, struct rpcrdma_xprt, rx_ia); | |
1460 | struct rpcrdma_buffer *buf = &r_xprt->rx_buf; | |
1461 | struct list_head *pos; | |
1462 | struct rpcrdma_mw *r; | |
1463 | int rc; | |
1464 | ||
1465 | list_for_each(pos, &buf->rb_all) { | |
1466 | r = list_entry(pos, struct rpcrdma_mw, mw_all); | |
1467 | ||
1468 | if (r->r.frmr.fr_state == FRMR_IS_INVALID) | |
1469 | continue; | |
1470 | ||
1471 | rc = ib_dereg_mr(r->r.frmr.fr_mr); | |
1472 | if (rc) | |
1473 | dprintk("RPC: %s: ib_dereg_mr failed %i\n", | |
1474 | __func__, rc); | |
1475 | ib_free_fast_reg_page_list(r->r.frmr.fr_pgl); | |
1476 | ||
1477 | r->r.frmr.fr_mr = ib_alloc_fast_reg_mr(ia->ri_pd, | |
1478 | ia->ri_max_frmr_depth); | |
1479 | if (IS_ERR(r->r.frmr.fr_mr)) { | |
1480 | rc = PTR_ERR(r->r.frmr.fr_mr); | |
1481 | dprintk("RPC: %s: ib_alloc_fast_reg_mr" | |
1482 | " failed %i\n", __func__, rc); | |
1483 | continue; | |
1484 | } | |
1485 | r->r.frmr.fr_pgl = ib_alloc_fast_reg_page_list( | |
1486 | ia->ri_id->device, | |
1487 | ia->ri_max_frmr_depth); | |
1488 | if (IS_ERR(r->r.frmr.fr_pgl)) { | |
1489 | rc = PTR_ERR(r->r.frmr.fr_pgl); | |
1490 | dprintk("RPC: %s: " | |
1491 | "ib_alloc_fast_reg_page_list " | |
1492 | "failed %i\n", __func__, rc); | |
1493 | ||
1494 | ib_dereg_mr(r->r.frmr.fr_mr); | |
1495 | continue; | |
1496 | } | |
1497 | r->r.frmr.fr_state = FRMR_IS_INVALID; | |
1498 | } | |
1499 | } | |
1500 | ||
c2922c02 CL |
1501 | /* "*mw" can be NULL when rpcrdma_buffer_get_mrs() fails, leaving |
1502 | * some req segments uninitialized. | |
1503 | */ | |
1504 | static void | |
1505 | rpcrdma_buffer_put_mr(struct rpcrdma_mw **mw, struct rpcrdma_buffer *buf) | |
1506 | { | |
1507 | if (*mw) { | |
1508 | list_add_tail(&(*mw)->mw_list, &buf->rb_mws); | |
1509 | *mw = NULL; | |
1510 | } | |
1511 | } | |
1512 | ||
1513 | /* Cycle mw's back in reverse order, and "spin" them. | |
1514 | * This delays and scrambles reuse as much as possible. | |
1515 | */ | |
1516 | static void | |
1517 | rpcrdma_buffer_put_mrs(struct rpcrdma_req *req, struct rpcrdma_buffer *buf) | |
1518 | { | |
1519 | struct rpcrdma_mr_seg *seg = req->rl_segments; | |
1520 | struct rpcrdma_mr_seg *seg1 = seg; | |
1521 | int i; | |
1522 | ||
1523 | for (i = 1, seg++; i < RPCRDMA_MAX_SEGS; seg++, i++) | |
3eb35810 CL |
1524 | rpcrdma_buffer_put_mr(&seg->rl_mw, buf); |
1525 | rpcrdma_buffer_put_mr(&seg1->rl_mw, buf); | |
c2922c02 CL |
1526 | } |
1527 | ||
1528 | static void | |
1529 | rpcrdma_buffer_put_sendbuf(struct rpcrdma_req *req, struct rpcrdma_buffer *buf) | |
1530 | { | |
1531 | buf->rb_send_bufs[--buf->rb_send_index] = req; | |
1532 | req->rl_niovs = 0; | |
1533 | if (req->rl_reply) { | |
1534 | buf->rb_recv_bufs[--buf->rb_recv_index] = req->rl_reply; | |
1535 | req->rl_reply->rr_func = NULL; | |
1536 | req->rl_reply = NULL; | |
1537 | } | |
1538 | } | |
1539 | ||
ddb6bebc CL |
1540 | /* rpcrdma_unmap_one() was already done by rpcrdma_deregister_frmr_external(). |
1541 | * Redo only the ib_post_send(). | |
1542 | */ | |
1543 | static void | |
1544 | rpcrdma_retry_local_inv(struct rpcrdma_mw *r, struct rpcrdma_ia *ia) | |
1545 | { | |
1546 | struct rpcrdma_xprt *r_xprt = | |
1547 | container_of(ia, struct rpcrdma_xprt, rx_ia); | |
1548 | struct ib_send_wr invalidate_wr, *bad_wr; | |
1549 | int rc; | |
1550 | ||
1551 | dprintk("RPC: %s: FRMR %p is stale\n", __func__, r); | |
1552 | ||
1553 | /* When this FRMR is re-inserted into rb_mws, it is no longer stale */ | |
dab7e3b8 | 1554 | r->r.frmr.fr_state = FRMR_IS_INVALID; |
ddb6bebc CL |
1555 | |
1556 | memset(&invalidate_wr, 0, sizeof(invalidate_wr)); | |
1557 | invalidate_wr.wr_id = (unsigned long)(void *)r; | |
1558 | invalidate_wr.opcode = IB_WR_LOCAL_INV; | |
ddb6bebc CL |
1559 | invalidate_wr.ex.invalidate_rkey = r->r.frmr.fr_mr->rkey; |
1560 | DECR_CQCOUNT(&r_xprt->rx_ep); | |
1561 | ||
1562 | dprintk("RPC: %s: frmr %p invalidating rkey %08x\n", | |
1563 | __func__, r, r->r.frmr.fr_mr->rkey); | |
1564 | ||
1565 | read_lock(&ia->ri_qplock); | |
1566 | rc = ib_post_send(ia->ri_id->qp, &invalidate_wr, &bad_wr); | |
1567 | read_unlock(&ia->ri_qplock); | |
1568 | if (rc) { | |
1569 | /* Force rpcrdma_buffer_get() to retry */ | |
1570 | r->r.frmr.fr_state = FRMR_IS_STALE; | |
1571 | dprintk("RPC: %s: ib_post_send failed, %i\n", | |
1572 | __func__, rc); | |
1573 | } | |
1574 | } | |
1575 | ||
1576 | static void | |
1577 | rpcrdma_retry_flushed_linv(struct list_head *stale, | |
1578 | struct rpcrdma_buffer *buf) | |
1579 | { | |
1580 | struct rpcrdma_ia *ia = rdmab_to_ia(buf); | |
1581 | struct list_head *pos; | |
1582 | struct rpcrdma_mw *r; | |
1583 | unsigned long flags; | |
1584 | ||
1585 | list_for_each(pos, stale) { | |
1586 | r = list_entry(pos, struct rpcrdma_mw, mw_list); | |
1587 | rpcrdma_retry_local_inv(r, ia); | |
1588 | } | |
1589 | ||
1590 | spin_lock_irqsave(&buf->rb_lock, flags); | |
1591 | list_splice_tail(stale, &buf->rb_mws); | |
1592 | spin_unlock_irqrestore(&buf->rb_lock, flags); | |
1593 | } | |
1594 | ||
1595 | static struct rpcrdma_req * | |
1596 | rpcrdma_buffer_get_frmrs(struct rpcrdma_req *req, struct rpcrdma_buffer *buf, | |
1597 | struct list_head *stale) | |
1598 | { | |
1599 | struct rpcrdma_mw *r; | |
1600 | int i; | |
1601 | ||
1602 | i = RPCRDMA_MAX_SEGS - 1; | |
1603 | while (!list_empty(&buf->rb_mws)) { | |
1604 | r = list_entry(buf->rb_mws.next, | |
1605 | struct rpcrdma_mw, mw_list); | |
1606 | list_del(&r->mw_list); | |
1607 | if (r->r.frmr.fr_state == FRMR_IS_STALE) { | |
1608 | list_add(&r->mw_list, stale); | |
1609 | continue; | |
1610 | } | |
3eb35810 | 1611 | req->rl_segments[i].rl_mw = r; |
ddb6bebc CL |
1612 | if (unlikely(i-- == 0)) |
1613 | return req; /* Success */ | |
1614 | } | |
1615 | ||
1616 | /* Not enough entries on rb_mws for this req */ | |
1617 | rpcrdma_buffer_put_sendbuf(req, buf); | |
1618 | rpcrdma_buffer_put_mrs(req, buf); | |
1619 | return NULL; | |
1620 | } | |
1621 | ||
c2922c02 | 1622 | static struct rpcrdma_req * |
ddb6bebc | 1623 | rpcrdma_buffer_get_fmrs(struct rpcrdma_req *req, struct rpcrdma_buffer *buf) |
c2922c02 CL |
1624 | { |
1625 | struct rpcrdma_mw *r; | |
1626 | int i; | |
1627 | ||
1628 | i = RPCRDMA_MAX_SEGS - 1; | |
1629 | while (!list_empty(&buf->rb_mws)) { | |
1630 | r = list_entry(buf->rb_mws.next, | |
1631 | struct rpcrdma_mw, mw_list); | |
1632 | list_del(&r->mw_list); | |
3eb35810 | 1633 | req->rl_segments[i].rl_mw = r; |
c2922c02 CL |
1634 | if (unlikely(i-- == 0)) |
1635 | return req; /* Success */ | |
1636 | } | |
1637 | ||
1638 | /* Not enough entries on rb_mws for this req */ | |
1639 | rpcrdma_buffer_put_sendbuf(req, buf); | |
1640 | rpcrdma_buffer_put_mrs(req, buf); | |
1641 | return NULL; | |
1642 | } | |
1643 | ||
c56c65fb TT |
1644 | /* |
1645 | * Get a set of request/reply buffers. | |
1646 | * | |
1647 | * Reply buffer (if needed) is attached to send buffer upon return. | |
1648 | * Rule: | |
1649 | * rb_send_index and rb_recv_index MUST always be pointing to the | |
1650 | * *next* available buffer (non-NULL). They are incremented after | |
1651 | * removing buffers, and decremented *before* returning them. | |
1652 | */ | |
1653 | struct rpcrdma_req * | |
1654 | rpcrdma_buffer_get(struct rpcrdma_buffer *buffers) | |
1655 | { | |
c2922c02 | 1656 | struct rpcrdma_ia *ia = rdmab_to_ia(buffers); |
ddb6bebc | 1657 | struct list_head stale; |
c56c65fb TT |
1658 | struct rpcrdma_req *req; |
1659 | unsigned long flags; | |
1660 | ||
1661 | spin_lock_irqsave(&buffers->rb_lock, flags); | |
1662 | if (buffers->rb_send_index == buffers->rb_max_requests) { | |
1663 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1664 | dprintk("RPC: %s: out of request buffers\n", __func__); | |
1665 | return ((struct rpcrdma_req *)NULL); | |
1666 | } | |
1667 | ||
1668 | req = buffers->rb_send_bufs[buffers->rb_send_index]; | |
1669 | if (buffers->rb_send_index < buffers->rb_recv_index) { | |
1670 | dprintk("RPC: %s: %d extra receives outstanding (ok)\n", | |
1671 | __func__, | |
1672 | buffers->rb_recv_index - buffers->rb_send_index); | |
1673 | req->rl_reply = NULL; | |
1674 | } else { | |
1675 | req->rl_reply = buffers->rb_recv_bufs[buffers->rb_recv_index]; | |
1676 | buffers->rb_recv_bufs[buffers->rb_recv_index++] = NULL; | |
1677 | } | |
1678 | buffers->rb_send_bufs[buffers->rb_send_index++] = NULL; | |
ddb6bebc CL |
1679 | |
1680 | INIT_LIST_HEAD(&stale); | |
c2922c02 CL |
1681 | switch (ia->ri_memreg_strategy) { |
1682 | case RPCRDMA_FRMR: | |
ddb6bebc CL |
1683 | req = rpcrdma_buffer_get_frmrs(req, buffers, &stale); |
1684 | break; | |
c2922c02 | 1685 | case RPCRDMA_MTHCAFMR: |
ddb6bebc | 1686 | req = rpcrdma_buffer_get_fmrs(req, buffers); |
c2922c02 CL |
1687 | break; |
1688 | default: | |
1689 | break; | |
c56c65fb TT |
1690 | } |
1691 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
ddb6bebc CL |
1692 | if (!list_empty(&stale)) |
1693 | rpcrdma_retry_flushed_linv(&stale, buffers); | |
c56c65fb TT |
1694 | return req; |
1695 | } | |
1696 | ||
1697 | /* | |
1698 | * Put request/reply buffers back into pool. | |
1699 | * Pre-decrement counter/array index. | |
1700 | */ | |
1701 | void | |
1702 | rpcrdma_buffer_put(struct rpcrdma_req *req) | |
1703 | { | |
1704 | struct rpcrdma_buffer *buffers = req->rl_buffer; | |
1705 | struct rpcrdma_ia *ia = rdmab_to_ia(buffers); | |
c56c65fb TT |
1706 | unsigned long flags; |
1707 | ||
c56c65fb | 1708 | spin_lock_irqsave(&buffers->rb_lock, flags); |
c2922c02 | 1709 | rpcrdma_buffer_put_sendbuf(req, buffers); |
c56c65fb | 1710 | switch (ia->ri_memreg_strategy) { |
3197d309 | 1711 | case RPCRDMA_FRMR: |
c56c65fb | 1712 | case RPCRDMA_MTHCAFMR: |
c2922c02 | 1713 | rpcrdma_buffer_put_mrs(req, buffers); |
c56c65fb TT |
1714 | break; |
1715 | default: | |
1716 | break; | |
1717 | } | |
1718 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1719 | } | |
1720 | ||
1721 | /* | |
1722 | * Recover reply buffers from pool. | |
1723 | * This happens when recovering from error conditions. | |
1724 | * Post-increment counter/array index. | |
1725 | */ | |
1726 | void | |
1727 | rpcrdma_recv_buffer_get(struct rpcrdma_req *req) | |
1728 | { | |
1729 | struct rpcrdma_buffer *buffers = req->rl_buffer; | |
1730 | unsigned long flags; | |
1731 | ||
1732 | if (req->rl_iov.length == 0) /* special case xprt_rdma_allocate() */ | |
1733 | buffers = ((struct rpcrdma_req *) buffers)->rl_buffer; | |
1734 | spin_lock_irqsave(&buffers->rb_lock, flags); | |
1735 | if (buffers->rb_recv_index < buffers->rb_max_requests) { | |
1736 | req->rl_reply = buffers->rb_recv_bufs[buffers->rb_recv_index]; | |
1737 | buffers->rb_recv_bufs[buffers->rb_recv_index++] = NULL; | |
1738 | } | |
1739 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1740 | } | |
1741 | ||
1742 | /* | |
1743 | * Put reply buffers back into pool when not attached to | |
b45ccfd2 | 1744 | * request. This happens in error conditions. |
c56c65fb TT |
1745 | */ |
1746 | void | |
1747 | rpcrdma_recv_buffer_put(struct rpcrdma_rep *rep) | |
1748 | { | |
1749 | struct rpcrdma_buffer *buffers = rep->rr_buffer; | |
1750 | unsigned long flags; | |
1751 | ||
1752 | rep->rr_func = NULL; | |
1753 | spin_lock_irqsave(&buffers->rb_lock, flags); | |
1754 | buffers->rb_recv_bufs[--buffers->rb_recv_index] = rep; | |
1755 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1756 | } | |
1757 | ||
1758 | /* | |
1759 | * Wrappers for internal-use kmalloc memory registration, used by buffer code. | |
1760 | */ | |
1761 | ||
1762 | int | |
1763 | rpcrdma_register_internal(struct rpcrdma_ia *ia, void *va, int len, | |
1764 | struct ib_mr **mrp, struct ib_sge *iov) | |
1765 | { | |
1766 | struct ib_phys_buf ipb; | |
1767 | struct ib_mr *mr; | |
1768 | int rc; | |
1769 | ||
1770 | /* | |
1771 | * All memory passed here was kmalloc'ed, therefore phys-contiguous. | |
1772 | */ | |
1773 | iov->addr = ib_dma_map_single(ia->ri_id->device, | |
1774 | va, len, DMA_BIDIRECTIONAL); | |
bf858ab0 YB |
1775 | if (ib_dma_mapping_error(ia->ri_id->device, iov->addr)) |
1776 | return -ENOMEM; | |
1777 | ||
c56c65fb TT |
1778 | iov->length = len; |
1779 | ||
bd7ed1d1 TT |
1780 | if (ia->ri_have_dma_lkey) { |
1781 | *mrp = NULL; | |
1782 | iov->lkey = ia->ri_dma_lkey; | |
1783 | return 0; | |
1784 | } else if (ia->ri_bind_mem != NULL) { | |
c56c65fb TT |
1785 | *mrp = NULL; |
1786 | iov->lkey = ia->ri_bind_mem->lkey; | |
1787 | return 0; | |
1788 | } | |
1789 | ||
1790 | ipb.addr = iov->addr; | |
1791 | ipb.size = iov->length; | |
1792 | mr = ib_reg_phys_mr(ia->ri_pd, &ipb, 1, | |
1793 | IB_ACCESS_LOCAL_WRITE, &iov->addr); | |
1794 | ||
1795 | dprintk("RPC: %s: phys convert: 0x%llx " | |
1796 | "registered 0x%llx length %d\n", | |
a56daeb7 AM |
1797 | __func__, (unsigned long long)ipb.addr, |
1798 | (unsigned long long)iov->addr, len); | |
c56c65fb TT |
1799 | |
1800 | if (IS_ERR(mr)) { | |
1801 | *mrp = NULL; | |
1802 | rc = PTR_ERR(mr); | |
1803 | dprintk("RPC: %s: failed with %i\n", __func__, rc); | |
1804 | } else { | |
1805 | *mrp = mr; | |
1806 | iov->lkey = mr->lkey; | |
1807 | rc = 0; | |
1808 | } | |
1809 | ||
1810 | return rc; | |
1811 | } | |
1812 | ||
1813 | int | |
1814 | rpcrdma_deregister_internal(struct rpcrdma_ia *ia, | |
1815 | struct ib_mr *mr, struct ib_sge *iov) | |
1816 | { | |
1817 | int rc; | |
1818 | ||
1819 | ib_dma_unmap_single(ia->ri_id->device, | |
1820 | iov->addr, iov->length, DMA_BIDIRECTIONAL); | |
1821 | ||
1822 | if (NULL == mr) | |
1823 | return 0; | |
1824 | ||
1825 | rc = ib_dereg_mr(mr); | |
1826 | if (rc) | |
1827 | dprintk("RPC: %s: ib_dereg_mr failed %i\n", __func__, rc); | |
1828 | return rc; | |
1829 | } | |
1830 | ||
1831 | /* | |
1832 | * Wrappers for chunk registration, shared by read/write chunk code. | |
1833 | */ | |
1834 | ||
1835 | static void | |
1836 | rpcrdma_map_one(struct rpcrdma_ia *ia, struct rpcrdma_mr_seg *seg, int writing) | |
1837 | { | |
1838 | seg->mr_dir = writing ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
1839 | seg->mr_dmalen = seg->mr_len; | |
1840 | if (seg->mr_page) | |
1841 | seg->mr_dma = ib_dma_map_page(ia->ri_id->device, | |
1842 | seg->mr_page, offset_in_page(seg->mr_offset), | |
1843 | seg->mr_dmalen, seg->mr_dir); | |
1844 | else | |
1845 | seg->mr_dma = ib_dma_map_single(ia->ri_id->device, | |
1846 | seg->mr_offset, | |
1847 | seg->mr_dmalen, seg->mr_dir); | |
5c635e09 TT |
1848 | if (ib_dma_mapping_error(ia->ri_id->device, seg->mr_dma)) { |
1849 | dprintk("RPC: %s: mr_dma %llx mr_offset %p mr_dma_len %zu\n", | |
1850 | __func__, | |
986d4abb RD |
1851 | (unsigned long long)seg->mr_dma, |
1852 | seg->mr_offset, seg->mr_dmalen); | |
5c635e09 | 1853 | } |
c56c65fb TT |
1854 | } |
1855 | ||
1856 | static void | |
1857 | rpcrdma_unmap_one(struct rpcrdma_ia *ia, struct rpcrdma_mr_seg *seg) | |
1858 | { | |
1859 | if (seg->mr_page) | |
1860 | ib_dma_unmap_page(ia->ri_id->device, | |
1861 | seg->mr_dma, seg->mr_dmalen, seg->mr_dir); | |
1862 | else | |
1863 | ib_dma_unmap_single(ia->ri_id->device, | |
1864 | seg->mr_dma, seg->mr_dmalen, seg->mr_dir); | |
1865 | } | |
1866 | ||
3197d309 TT |
1867 | static int |
1868 | rpcrdma_register_frmr_external(struct rpcrdma_mr_seg *seg, | |
1869 | int *nsegs, int writing, struct rpcrdma_ia *ia, | |
1870 | struct rpcrdma_xprt *r_xprt) | |
1871 | { | |
1872 | struct rpcrdma_mr_seg *seg1 = seg; | |
3eb35810 | 1873 | struct rpcrdma_mw *mw = seg1->rl_mw; |
0dbb4108 CL |
1874 | struct rpcrdma_frmr *frmr = &mw->r.frmr; |
1875 | struct ib_mr *mr = frmr->fr_mr; | |
f590e878 | 1876 | struct ib_send_wr fastreg_wr, *bad_wr; |
3197d309 TT |
1877 | u8 key; |
1878 | int len, pageoff; | |
1879 | int i, rc; | |
9b78145c TT |
1880 | int seg_len; |
1881 | u64 pa; | |
1882 | int page_no; | |
3197d309 TT |
1883 | |
1884 | pageoff = offset_in_page(seg1->mr_offset); | |
1885 | seg1->mr_offset -= pageoff; /* start of page */ | |
1886 | seg1->mr_len += pageoff; | |
1887 | len = -pageoff; | |
0fc6c4e7 SW |
1888 | if (*nsegs > ia->ri_max_frmr_depth) |
1889 | *nsegs = ia->ri_max_frmr_depth; | |
9b78145c | 1890 | for (page_no = i = 0; i < *nsegs;) { |
3197d309 | 1891 | rpcrdma_map_one(ia, seg, writing); |
9b78145c TT |
1892 | pa = seg->mr_dma; |
1893 | for (seg_len = seg->mr_len; seg_len > 0; seg_len -= PAGE_SIZE) { | |
0dbb4108 | 1894 | frmr->fr_pgl->page_list[page_no++] = pa; |
9b78145c TT |
1895 | pa += PAGE_SIZE; |
1896 | } | |
3197d309 TT |
1897 | len += seg->mr_len; |
1898 | ++seg; | |
1899 | ++i; | |
1900 | /* Check for holes */ | |
1901 | if ((i < *nsegs && offset_in_page(seg->mr_offset)) || | |
1902 | offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len)) | |
1903 | break; | |
1904 | } | |
1905 | dprintk("RPC: %s: Using frmr %p to map %d segments\n", | |
0dbb4108 | 1906 | __func__, mw, i); |
3197d309 | 1907 | |
05055722 CL |
1908 | frmr->fr_state = FRMR_IS_VALID; |
1909 | ||
f590e878 CL |
1910 | memset(&fastreg_wr, 0, sizeof(fastreg_wr)); |
1911 | fastreg_wr.wr_id = (unsigned long)(void *)mw; | |
1912 | fastreg_wr.opcode = IB_WR_FAST_REG_MR; | |
1913 | fastreg_wr.wr.fast_reg.iova_start = seg1->mr_dma; | |
1914 | fastreg_wr.wr.fast_reg.page_list = frmr->fr_pgl; | |
1915 | fastreg_wr.wr.fast_reg.page_list_len = page_no; | |
1916 | fastreg_wr.wr.fast_reg.page_shift = PAGE_SHIFT; | |
1917 | fastreg_wr.wr.fast_reg.length = page_no << PAGE_SHIFT; | |
1918 | if (fastreg_wr.wr.fast_reg.length < len) { | |
5fc83f47 CL |
1919 | rc = -EIO; |
1920 | goto out_err; | |
c977dea2 CL |
1921 | } |
1922 | ||
1923 | /* Bump the key */ | |
0dbb4108 CL |
1924 | key = (u8)(mr->rkey & 0x000000FF); |
1925 | ib_update_fast_reg_key(mr, ++key); | |
c977dea2 | 1926 | |
f590e878 | 1927 | fastreg_wr.wr.fast_reg.access_flags = (writing ? |
68743082 VP |
1928 | IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE : |
1929 | IB_ACCESS_REMOTE_READ); | |
f590e878 | 1930 | fastreg_wr.wr.fast_reg.rkey = mr->rkey; |
3197d309 TT |
1931 | DECR_CQCOUNT(&r_xprt->rx_ep); |
1932 | ||
f590e878 | 1933 | rc = ib_post_send(ia->ri_id->qp, &fastreg_wr, &bad_wr); |
3197d309 TT |
1934 | if (rc) { |
1935 | dprintk("RPC: %s: failed ib_post_send for register," | |
1936 | " status %i\n", __func__, rc); | |
c93e986a | 1937 | ib_update_fast_reg_key(mr, --key); |
5fc83f47 | 1938 | goto out_err; |
3197d309 | 1939 | } else { |
0dbb4108 | 1940 | seg1->mr_rkey = mr->rkey; |
3197d309 TT |
1941 | seg1->mr_base = seg1->mr_dma + pageoff; |
1942 | seg1->mr_nsegs = i; | |
1943 | seg1->mr_len = len; | |
1944 | } | |
1945 | *nsegs = i; | |
5fc83f47 CL |
1946 | return 0; |
1947 | out_err: | |
05055722 | 1948 | frmr->fr_state = FRMR_IS_INVALID; |
5fc83f47 CL |
1949 | while (i--) |
1950 | rpcrdma_unmap_one(ia, --seg); | |
3197d309 TT |
1951 | return rc; |
1952 | } | |
1953 | ||
1954 | static int | |
1955 | rpcrdma_deregister_frmr_external(struct rpcrdma_mr_seg *seg, | |
1956 | struct rpcrdma_ia *ia, struct rpcrdma_xprt *r_xprt) | |
1957 | { | |
1958 | struct rpcrdma_mr_seg *seg1 = seg; | |
1959 | struct ib_send_wr invalidate_wr, *bad_wr; | |
1960 | int rc; | |
1961 | ||
3eb35810 | 1962 | seg1->rl_mw->r.frmr.fr_state = FRMR_IS_INVALID; |
dab7e3b8 | 1963 | |
3197d309 | 1964 | memset(&invalidate_wr, 0, sizeof invalidate_wr); |
3eb35810 | 1965 | invalidate_wr.wr_id = (unsigned long)(void *)seg1->rl_mw; |
3197d309 | 1966 | invalidate_wr.opcode = IB_WR_LOCAL_INV; |
3eb35810 | 1967 | invalidate_wr.ex.invalidate_rkey = seg1->rl_mw->r.frmr.fr_mr->rkey; |
3197d309 TT |
1968 | DECR_CQCOUNT(&r_xprt->rx_ep); |
1969 | ||
73806c88 CL |
1970 | read_lock(&ia->ri_qplock); |
1971 | while (seg1->mr_nsegs--) | |
1972 | rpcrdma_unmap_one(ia, seg++); | |
3197d309 | 1973 | rc = ib_post_send(ia->ri_id->qp, &invalidate_wr, &bad_wr); |
73806c88 | 1974 | read_unlock(&ia->ri_qplock); |
dab7e3b8 CL |
1975 | if (rc) { |
1976 | /* Force rpcrdma_buffer_get() to retry */ | |
3eb35810 | 1977 | seg1->rl_mw->r.frmr.fr_state = FRMR_IS_STALE; |
3197d309 TT |
1978 | dprintk("RPC: %s: failed ib_post_send for invalidate," |
1979 | " status %i\n", __func__, rc); | |
dab7e3b8 | 1980 | } |
3197d309 TT |
1981 | return rc; |
1982 | } | |
1983 | ||
8d4ba034 TT |
1984 | static int |
1985 | rpcrdma_register_fmr_external(struct rpcrdma_mr_seg *seg, | |
1986 | int *nsegs, int writing, struct rpcrdma_ia *ia) | |
1987 | { | |
1988 | struct rpcrdma_mr_seg *seg1 = seg; | |
1989 | u64 physaddrs[RPCRDMA_MAX_DATA_SEGS]; | |
1990 | int len, pageoff, i, rc; | |
1991 | ||
1992 | pageoff = offset_in_page(seg1->mr_offset); | |
1993 | seg1->mr_offset -= pageoff; /* start of page */ | |
1994 | seg1->mr_len += pageoff; | |
1995 | len = -pageoff; | |
1996 | if (*nsegs > RPCRDMA_MAX_DATA_SEGS) | |
1997 | *nsegs = RPCRDMA_MAX_DATA_SEGS; | |
1998 | for (i = 0; i < *nsegs;) { | |
1999 | rpcrdma_map_one(ia, seg, writing); | |
2000 | physaddrs[i] = seg->mr_dma; | |
2001 | len += seg->mr_len; | |
2002 | ++seg; | |
2003 | ++i; | |
2004 | /* Check for holes */ | |
2005 | if ((i < *nsegs && offset_in_page(seg->mr_offset)) || | |
2006 | offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len)) | |
2007 | break; | |
2008 | } | |
3eb35810 | 2009 | rc = ib_map_phys_fmr(seg1->rl_mw->r.fmr, physaddrs, i, seg1->mr_dma); |
8d4ba034 TT |
2010 | if (rc) { |
2011 | dprintk("RPC: %s: failed ib_map_phys_fmr " | |
2012 | "%u@0x%llx+%i (%d)... status %i\n", __func__, | |
2013 | len, (unsigned long long)seg1->mr_dma, | |
2014 | pageoff, i, rc); | |
2015 | while (i--) | |
2016 | rpcrdma_unmap_one(ia, --seg); | |
2017 | } else { | |
3eb35810 | 2018 | seg1->mr_rkey = seg1->rl_mw->r.fmr->rkey; |
8d4ba034 TT |
2019 | seg1->mr_base = seg1->mr_dma + pageoff; |
2020 | seg1->mr_nsegs = i; | |
2021 | seg1->mr_len = len; | |
2022 | } | |
2023 | *nsegs = i; | |
2024 | return rc; | |
2025 | } | |
2026 | ||
2027 | static int | |
2028 | rpcrdma_deregister_fmr_external(struct rpcrdma_mr_seg *seg, | |
2029 | struct rpcrdma_ia *ia) | |
2030 | { | |
2031 | struct rpcrdma_mr_seg *seg1 = seg; | |
2032 | LIST_HEAD(l); | |
2033 | int rc; | |
2034 | ||
3eb35810 | 2035 | list_add(&seg1->rl_mw->r.fmr->list, &l); |
8d4ba034 | 2036 | rc = ib_unmap_fmr(&l); |
73806c88 | 2037 | read_lock(&ia->ri_qplock); |
8d4ba034 TT |
2038 | while (seg1->mr_nsegs--) |
2039 | rpcrdma_unmap_one(ia, seg++); | |
73806c88 | 2040 | read_unlock(&ia->ri_qplock); |
8d4ba034 TT |
2041 | if (rc) |
2042 | dprintk("RPC: %s: failed ib_unmap_fmr," | |
2043 | " status %i\n", __func__, rc); | |
2044 | return rc; | |
2045 | } | |
2046 | ||
c56c65fb TT |
2047 | int |
2048 | rpcrdma_register_external(struct rpcrdma_mr_seg *seg, | |
2049 | int nsegs, int writing, struct rpcrdma_xprt *r_xprt) | |
2050 | { | |
2051 | struct rpcrdma_ia *ia = &r_xprt->rx_ia; | |
c56c65fb TT |
2052 | int rc = 0; |
2053 | ||
2054 | switch (ia->ri_memreg_strategy) { | |
2055 | ||
c56c65fb TT |
2056 | case RPCRDMA_ALLPHYSICAL: |
2057 | rpcrdma_map_one(ia, seg, writing); | |
2058 | seg->mr_rkey = ia->ri_bind_mem->rkey; | |
2059 | seg->mr_base = seg->mr_dma; | |
2060 | seg->mr_nsegs = 1; | |
2061 | nsegs = 1; | |
2062 | break; | |
c56c65fb | 2063 | |
3197d309 TT |
2064 | /* Registration using frmr registration */ |
2065 | case RPCRDMA_FRMR: | |
2066 | rc = rpcrdma_register_frmr_external(seg, &nsegs, writing, ia, r_xprt); | |
2067 | break; | |
2068 | ||
8d4ba034 | 2069 | /* Registration using fmr memory registration */ |
c56c65fb | 2070 | case RPCRDMA_MTHCAFMR: |
8d4ba034 | 2071 | rc = rpcrdma_register_fmr_external(seg, &nsegs, writing, ia); |
c56c65fb TT |
2072 | break; |
2073 | ||
c56c65fb | 2074 | default: |
92b98361 | 2075 | return -EIO; |
c56c65fb TT |
2076 | } |
2077 | if (rc) | |
92b98361 | 2078 | return rc; |
c56c65fb TT |
2079 | |
2080 | return nsegs; | |
2081 | } | |
2082 | ||
2083 | int | |
2084 | rpcrdma_deregister_external(struct rpcrdma_mr_seg *seg, | |
13c9ff8f | 2085 | struct rpcrdma_xprt *r_xprt) |
c56c65fb TT |
2086 | { |
2087 | struct rpcrdma_ia *ia = &r_xprt->rx_ia; | |
c56c65fb TT |
2088 | int nsegs = seg->mr_nsegs, rc; |
2089 | ||
2090 | switch (ia->ri_memreg_strategy) { | |
2091 | ||
c56c65fb | 2092 | case RPCRDMA_ALLPHYSICAL: |
73806c88 | 2093 | read_lock(&ia->ri_qplock); |
c56c65fb | 2094 | rpcrdma_unmap_one(ia, seg); |
73806c88 | 2095 | read_unlock(&ia->ri_qplock); |
c56c65fb | 2096 | break; |
c56c65fb | 2097 | |
3197d309 TT |
2098 | case RPCRDMA_FRMR: |
2099 | rc = rpcrdma_deregister_frmr_external(seg, ia, r_xprt); | |
2100 | break; | |
2101 | ||
c56c65fb | 2102 | case RPCRDMA_MTHCAFMR: |
8d4ba034 | 2103 | rc = rpcrdma_deregister_fmr_external(seg, ia); |
c56c65fb TT |
2104 | break; |
2105 | ||
c56c65fb | 2106 | default: |
c56c65fb TT |
2107 | break; |
2108 | } | |
c56c65fb TT |
2109 | return nsegs; |
2110 | } | |
2111 | ||
2112 | /* | |
2113 | * Prepost any receive buffer, then post send. | |
2114 | * | |
2115 | * Receive buffer is donated to hardware, reclaimed upon recv completion. | |
2116 | */ | |
2117 | int | |
2118 | rpcrdma_ep_post(struct rpcrdma_ia *ia, | |
2119 | struct rpcrdma_ep *ep, | |
2120 | struct rpcrdma_req *req) | |
2121 | { | |
2122 | struct ib_send_wr send_wr, *send_wr_fail; | |
2123 | struct rpcrdma_rep *rep = req->rl_reply; | |
2124 | int rc; | |
2125 | ||
2126 | if (rep) { | |
2127 | rc = rpcrdma_ep_post_recv(ia, ep, rep); | |
2128 | if (rc) | |
2129 | goto out; | |
2130 | req->rl_reply = NULL; | |
2131 | } | |
2132 | ||
2133 | send_wr.next = NULL; | |
2134 | send_wr.wr_id = 0ULL; /* no send cookie */ | |
2135 | send_wr.sg_list = req->rl_send_iov; | |
2136 | send_wr.num_sge = req->rl_niovs; | |
2137 | send_wr.opcode = IB_WR_SEND; | |
c56c65fb TT |
2138 | if (send_wr.num_sge == 4) /* no need to sync any pad (constant) */ |
2139 | ib_dma_sync_single_for_device(ia->ri_id->device, | |
2140 | req->rl_send_iov[3].addr, req->rl_send_iov[3].length, | |
2141 | DMA_TO_DEVICE); | |
2142 | ib_dma_sync_single_for_device(ia->ri_id->device, | |
2143 | req->rl_send_iov[1].addr, req->rl_send_iov[1].length, | |
2144 | DMA_TO_DEVICE); | |
2145 | ib_dma_sync_single_for_device(ia->ri_id->device, | |
2146 | req->rl_send_iov[0].addr, req->rl_send_iov[0].length, | |
2147 | DMA_TO_DEVICE); | |
2148 | ||
2149 | if (DECR_CQCOUNT(ep) > 0) | |
2150 | send_wr.send_flags = 0; | |
2151 | else { /* Provider must take a send completion every now and then */ | |
2152 | INIT_CQCOUNT(ep); | |
2153 | send_wr.send_flags = IB_SEND_SIGNALED; | |
2154 | } | |
2155 | ||
2156 | rc = ib_post_send(ia->ri_id->qp, &send_wr, &send_wr_fail); | |
2157 | if (rc) | |
2158 | dprintk("RPC: %s: ib_post_send returned %i\n", __func__, | |
2159 | rc); | |
2160 | out: | |
2161 | return rc; | |
2162 | } | |
2163 | ||
2164 | /* | |
2165 | * (Re)post a receive buffer. | |
2166 | */ | |
2167 | int | |
2168 | rpcrdma_ep_post_recv(struct rpcrdma_ia *ia, | |
2169 | struct rpcrdma_ep *ep, | |
2170 | struct rpcrdma_rep *rep) | |
2171 | { | |
2172 | struct ib_recv_wr recv_wr, *recv_wr_fail; | |
2173 | int rc; | |
2174 | ||
2175 | recv_wr.next = NULL; | |
2176 | recv_wr.wr_id = (u64) (unsigned long) rep; | |
2177 | recv_wr.sg_list = &rep->rr_iov; | |
2178 | recv_wr.num_sge = 1; | |
2179 | ||
2180 | ib_dma_sync_single_for_cpu(ia->ri_id->device, | |
2181 | rep->rr_iov.addr, rep->rr_iov.length, DMA_BIDIRECTIONAL); | |
2182 | ||
c56c65fb TT |
2183 | rc = ib_post_recv(ia->ri_id->qp, &recv_wr, &recv_wr_fail); |
2184 | ||
2185 | if (rc) | |
2186 | dprintk("RPC: %s: ib_post_recv returned %i\n", __func__, | |
2187 | rc); | |
2188 | return rc; | |
2189 | } | |
43e95988 CL |
2190 | |
2191 | /* Physical mapping means one Read/Write list entry per-page. | |
2192 | * All list entries must fit within an inline buffer | |
2193 | * | |
2194 | * NB: The server must return a Write list for NFS READ, | |
2195 | * which has the same constraint. Factor in the inline | |
2196 | * rsize as well. | |
2197 | */ | |
2198 | static size_t | |
2199 | rpcrdma_physical_max_payload(struct rpcrdma_xprt *r_xprt) | |
2200 | { | |
2201 | struct rpcrdma_create_data_internal *cdata = &r_xprt->rx_data; | |
2202 | unsigned int inline_size, pages; | |
2203 | ||
2204 | inline_size = min_t(unsigned int, | |
2205 | cdata->inline_wsize, cdata->inline_rsize); | |
2206 | inline_size -= RPCRDMA_HDRLEN_MIN; | |
2207 | pages = inline_size / sizeof(struct rpcrdma_segment); | |
2208 | return pages << PAGE_SHIFT; | |
2209 | } | |
2210 | ||
2211 | static size_t | |
2212 | rpcrdma_mr_max_payload(struct rpcrdma_xprt *r_xprt) | |
2213 | { | |
2214 | return RPCRDMA_MAX_DATA_SEGS << PAGE_SHIFT; | |
2215 | } | |
2216 | ||
2217 | size_t | |
2218 | rpcrdma_max_payload(struct rpcrdma_xprt *r_xprt) | |
2219 | { | |
2220 | size_t result; | |
2221 | ||
2222 | switch (r_xprt->rx_ia.ri_memreg_strategy) { | |
2223 | case RPCRDMA_ALLPHYSICAL: | |
2224 | result = rpcrdma_physical_max_payload(r_xprt); | |
2225 | break; | |
2226 | default: | |
2227 | result = rpcrdma_mr_max_payload(r_xprt); | |
2228 | } | |
2229 | return result; | |
2230 | } |