]>
Commit | Line | Data |
---|---|---|
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 | ||
50 | #include <linux/pci.h> /* for Tavor hack below */ | |
51 | ||
f58851e6 TT |
52 | #include "xprt_rdma.h" |
53 | ||
c56c65fb TT |
54 | /* |
55 | * Globals/Macros | |
56 | */ | |
57 | ||
58 | #ifdef RPC_DEBUG | |
59 | # define RPCDBG_FACILITY RPCDBG_TRANS | |
60 | #endif | |
61 | ||
62 | /* | |
63 | * internal functions | |
64 | */ | |
65 | ||
66 | /* | |
67 | * handle replies in tasklet context, using a single, global list | |
68 | * rdma tasklet function -- just turn around and call the func | |
69 | * for all replies on the list | |
70 | */ | |
71 | ||
72 | static DEFINE_SPINLOCK(rpcrdma_tk_lock_g); | |
73 | static LIST_HEAD(rpcrdma_tasklets_g); | |
74 | ||
75 | static void | |
76 | rpcrdma_run_tasklet(unsigned long data) | |
77 | { | |
78 | struct rpcrdma_rep *rep; | |
79 | void (*func)(struct rpcrdma_rep *); | |
80 | unsigned long flags; | |
81 | ||
82 | data = data; | |
83 | spin_lock_irqsave(&rpcrdma_tk_lock_g, flags); | |
84 | while (!list_empty(&rpcrdma_tasklets_g)) { | |
85 | rep = list_entry(rpcrdma_tasklets_g.next, | |
86 | struct rpcrdma_rep, rr_list); | |
87 | list_del(&rep->rr_list); | |
88 | func = rep->rr_func; | |
89 | rep->rr_func = NULL; | |
90 | spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags); | |
91 | ||
92 | if (func) | |
93 | func(rep); | |
94 | else | |
95 | rpcrdma_recv_buffer_put(rep); | |
96 | ||
97 | spin_lock_irqsave(&rpcrdma_tk_lock_g, flags); | |
98 | } | |
99 | spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags); | |
100 | } | |
101 | ||
102 | static DECLARE_TASKLET(rpcrdma_tasklet_g, rpcrdma_run_tasklet, 0UL); | |
103 | ||
104 | static inline void | |
105 | rpcrdma_schedule_tasklet(struct rpcrdma_rep *rep) | |
106 | { | |
107 | unsigned long flags; | |
108 | ||
109 | spin_lock_irqsave(&rpcrdma_tk_lock_g, flags); | |
110 | list_add_tail(&rep->rr_list, &rpcrdma_tasklets_g); | |
111 | spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags); | |
112 | tasklet_schedule(&rpcrdma_tasklet_g); | |
113 | } | |
114 | ||
115 | static void | |
116 | rpcrdma_qp_async_error_upcall(struct ib_event *event, void *context) | |
117 | { | |
118 | struct rpcrdma_ep *ep = context; | |
119 | ||
120 | dprintk("RPC: %s: QP error %X on device %s ep %p\n", | |
121 | __func__, event->event, event->device->name, context); | |
122 | if (ep->rep_connected == 1) { | |
123 | ep->rep_connected = -EIO; | |
124 | ep->rep_func(ep); | |
125 | wake_up_all(&ep->rep_connect_wait); | |
126 | } | |
127 | } | |
128 | ||
129 | static void | |
130 | rpcrdma_cq_async_error_upcall(struct ib_event *event, void *context) | |
131 | { | |
132 | struct rpcrdma_ep *ep = context; | |
133 | ||
134 | dprintk("RPC: %s: CQ error %X on device %s ep %p\n", | |
135 | __func__, event->event, event->device->name, context); | |
136 | if (ep->rep_connected == 1) { | |
137 | ep->rep_connected = -EIO; | |
138 | ep->rep_func(ep); | |
139 | wake_up_all(&ep->rep_connect_wait); | |
140 | } | |
141 | } | |
142 | ||
143 | static inline | |
144 | void rpcrdma_event_process(struct ib_wc *wc) | |
145 | { | |
146 | struct rpcrdma_rep *rep = | |
147 | (struct rpcrdma_rep *)(unsigned long) wc->wr_id; | |
148 | ||
149 | dprintk("RPC: %s: event rep %p status %X opcode %X length %u\n", | |
150 | __func__, rep, wc->status, wc->opcode, wc->byte_len); | |
151 | ||
152 | if (!rep) /* send or bind completion that we don't care about */ | |
153 | return; | |
154 | ||
155 | if (IB_WC_SUCCESS != wc->status) { | |
156 | dprintk("RPC: %s: %s WC status %X, connection lost\n", | |
157 | __func__, (wc->opcode & IB_WC_RECV) ? "recv" : "send", | |
158 | wc->status); | |
159 | rep->rr_len = ~0U; | |
160 | rpcrdma_schedule_tasklet(rep); | |
161 | return; | |
162 | } | |
163 | ||
164 | switch (wc->opcode) { | |
165 | case IB_WC_RECV: | |
166 | rep->rr_len = wc->byte_len; | |
167 | ib_dma_sync_single_for_cpu( | |
168 | rdmab_to_ia(rep->rr_buffer)->ri_id->device, | |
169 | rep->rr_iov.addr, rep->rr_len, DMA_FROM_DEVICE); | |
170 | /* Keep (only) the most recent credits, after check validity */ | |
171 | if (rep->rr_len >= 16) { | |
172 | struct rpcrdma_msg *p = | |
173 | (struct rpcrdma_msg *) rep->rr_base; | |
174 | unsigned int credits = ntohl(p->rm_credit); | |
175 | if (credits == 0) { | |
176 | dprintk("RPC: %s: server" | |
177 | " dropped credits to 0!\n", __func__); | |
178 | /* don't deadlock */ | |
179 | credits = 1; | |
180 | } else if (credits > rep->rr_buffer->rb_max_requests) { | |
181 | dprintk("RPC: %s: server" | |
182 | " over-crediting: %d (%d)\n", | |
183 | __func__, credits, | |
184 | rep->rr_buffer->rb_max_requests); | |
185 | credits = rep->rr_buffer->rb_max_requests; | |
186 | } | |
187 | atomic_set(&rep->rr_buffer->rb_credits, credits); | |
188 | } | |
189 | /* fall through */ | |
190 | case IB_WC_BIND_MW: | |
191 | rpcrdma_schedule_tasklet(rep); | |
192 | break; | |
193 | default: | |
194 | dprintk("RPC: %s: unexpected WC event %X\n", | |
195 | __func__, wc->opcode); | |
196 | break; | |
197 | } | |
198 | } | |
199 | ||
200 | static inline int | |
201 | rpcrdma_cq_poll(struct ib_cq *cq) | |
202 | { | |
203 | struct ib_wc wc; | |
204 | int rc; | |
205 | ||
206 | for (;;) { | |
207 | rc = ib_poll_cq(cq, 1, &wc); | |
208 | if (rc < 0) { | |
209 | dprintk("RPC: %s: ib_poll_cq failed %i\n", | |
210 | __func__, rc); | |
211 | return rc; | |
212 | } | |
213 | if (rc == 0) | |
214 | break; | |
215 | ||
216 | rpcrdma_event_process(&wc); | |
217 | } | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | /* | |
223 | * rpcrdma_cq_event_upcall | |
224 | * | |
225 | * This upcall handles recv, send, bind and unbind events. | |
226 | * It is reentrant but processes single events in order to maintain | |
227 | * ordering of receives to keep server credits. | |
228 | * | |
229 | * It is the responsibility of the scheduled tasklet to return | |
230 | * recv buffers to the pool. NOTE: this affects synchronization of | |
231 | * connection shutdown. That is, the structures required for | |
232 | * the completion of the reply handler must remain intact until | |
233 | * all memory has been reclaimed. | |
234 | * | |
235 | * Note that send events are suppressed and do not result in an upcall. | |
236 | */ | |
237 | static void | |
238 | rpcrdma_cq_event_upcall(struct ib_cq *cq, void *context) | |
239 | { | |
240 | int rc; | |
241 | ||
242 | rc = rpcrdma_cq_poll(cq); | |
243 | if (rc) | |
244 | return; | |
245 | ||
246 | rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); | |
247 | if (rc) { | |
248 | dprintk("RPC: %s: ib_req_notify_cq failed %i\n", | |
249 | __func__, rc); | |
250 | return; | |
251 | } | |
252 | ||
253 | rpcrdma_cq_poll(cq); | |
254 | } | |
255 | ||
256 | #ifdef RPC_DEBUG | |
257 | static const char * const conn[] = { | |
258 | "address resolved", | |
259 | "address error", | |
260 | "route resolved", | |
261 | "route error", | |
262 | "connect request", | |
263 | "connect response", | |
264 | "connect error", | |
265 | "unreachable", | |
266 | "rejected", | |
267 | "established", | |
268 | "disconnected", | |
269 | "device removal" | |
270 | }; | |
271 | #endif | |
272 | ||
273 | static int | |
274 | rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event) | |
275 | { | |
276 | struct rpcrdma_xprt *xprt = id->context; | |
277 | struct rpcrdma_ia *ia = &xprt->rx_ia; | |
278 | struct rpcrdma_ep *ep = &xprt->rx_ep; | |
279 | struct sockaddr_in *addr = (struct sockaddr_in *) &ep->rep_remote_addr; | |
280 | struct ib_qp_attr attr; | |
281 | struct ib_qp_init_attr iattr; | |
282 | int connstate = 0; | |
283 | ||
284 | switch (event->event) { | |
285 | case RDMA_CM_EVENT_ADDR_RESOLVED: | |
286 | case RDMA_CM_EVENT_ROUTE_RESOLVED: | |
5675add3 | 287 | ia->ri_async_rc = 0; |
c56c65fb TT |
288 | complete(&ia->ri_done); |
289 | break; | |
290 | case RDMA_CM_EVENT_ADDR_ERROR: | |
291 | ia->ri_async_rc = -EHOSTUNREACH; | |
292 | dprintk("RPC: %s: CM address resolution error, ep 0x%p\n", | |
293 | __func__, ep); | |
294 | complete(&ia->ri_done); | |
295 | break; | |
296 | case RDMA_CM_EVENT_ROUTE_ERROR: | |
297 | ia->ri_async_rc = -ENETUNREACH; | |
298 | dprintk("RPC: %s: CM route resolution error, ep 0x%p\n", | |
299 | __func__, ep); | |
300 | complete(&ia->ri_done); | |
301 | break; | |
302 | case RDMA_CM_EVENT_ESTABLISHED: | |
303 | connstate = 1; | |
304 | ib_query_qp(ia->ri_id->qp, &attr, | |
305 | IB_QP_MAX_QP_RD_ATOMIC | IB_QP_MAX_DEST_RD_ATOMIC, | |
306 | &iattr); | |
307 | dprintk("RPC: %s: %d responder resources" | |
308 | " (%d initiator)\n", | |
309 | __func__, attr.max_dest_rd_atomic, attr.max_rd_atomic); | |
310 | goto connected; | |
311 | case RDMA_CM_EVENT_CONNECT_ERROR: | |
312 | connstate = -ENOTCONN; | |
313 | goto connected; | |
314 | case RDMA_CM_EVENT_UNREACHABLE: | |
315 | connstate = -ENETDOWN; | |
316 | goto connected; | |
317 | case RDMA_CM_EVENT_REJECTED: | |
318 | connstate = -ECONNREFUSED; | |
319 | goto connected; | |
320 | case RDMA_CM_EVENT_DISCONNECTED: | |
321 | connstate = -ECONNABORTED; | |
322 | goto connected; | |
323 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
324 | connstate = -ENODEV; | |
325 | connected: | |
326 | dprintk("RPC: %s: %s: %u.%u.%u.%u:%u" | |
327 | " (ep 0x%p event 0x%x)\n", | |
328 | __func__, | |
329 | (event->event <= 11) ? conn[event->event] : | |
330 | "unknown connection error", | |
331 | NIPQUAD(addr->sin_addr.s_addr), | |
332 | ntohs(addr->sin_port), | |
333 | ep, event->event); | |
334 | atomic_set(&rpcx_to_rdmax(ep->rep_xprt)->rx_buf.rb_credits, 1); | |
335 | dprintk("RPC: %s: %sconnected\n", | |
336 | __func__, connstate > 0 ? "" : "dis"); | |
337 | ep->rep_connected = connstate; | |
338 | ep->rep_func(ep); | |
339 | wake_up_all(&ep->rep_connect_wait); | |
340 | break; | |
341 | default: | |
1a954051 | 342 | dprintk("RPC: %s: unexpected CM event %d\n", |
c56c65fb | 343 | __func__, event->event); |
c56c65fb TT |
344 | break; |
345 | } | |
346 | ||
b3cd8d45 TT |
347 | #ifdef RPC_DEBUG |
348 | if (connstate == 1) { | |
349 | int ird = attr.max_dest_rd_atomic; | |
350 | int tird = ep->rep_remote_cma.responder_resources; | |
351 | printk(KERN_INFO "rpcrdma: connection to %u.%u.%u.%u:%u " | |
352 | "on %s, memreg %d slots %d ird %d%s\n", | |
353 | NIPQUAD(addr->sin_addr.s_addr), | |
354 | ntohs(addr->sin_port), | |
355 | ia->ri_id->device->name, | |
356 | ia->ri_memreg_strategy, | |
357 | xprt->rx_buf.rb_max_requests, | |
358 | ird, ird < 4 && ird < tird / 2 ? " (low!)" : ""); | |
359 | } else if (connstate < 0) { | |
360 | printk(KERN_INFO "rpcrdma: connection to %u.%u.%u.%u:%u " | |
361 | "closed (%d)\n", | |
362 | NIPQUAD(addr->sin_addr.s_addr), | |
363 | ntohs(addr->sin_port), | |
364 | connstate); | |
365 | } | |
366 | #endif | |
367 | ||
c56c65fb TT |
368 | return 0; |
369 | } | |
370 | ||
371 | static struct rdma_cm_id * | |
372 | rpcrdma_create_id(struct rpcrdma_xprt *xprt, | |
373 | struct rpcrdma_ia *ia, struct sockaddr *addr) | |
374 | { | |
375 | struct rdma_cm_id *id; | |
376 | int rc; | |
377 | ||
1a954051 TT |
378 | init_completion(&ia->ri_done); |
379 | ||
c56c65fb TT |
380 | id = rdma_create_id(rpcrdma_conn_upcall, xprt, RDMA_PS_TCP); |
381 | if (IS_ERR(id)) { | |
382 | rc = PTR_ERR(id); | |
383 | dprintk("RPC: %s: rdma_create_id() failed %i\n", | |
384 | __func__, rc); | |
385 | return id; | |
386 | } | |
387 | ||
5675add3 | 388 | ia->ri_async_rc = -ETIMEDOUT; |
c56c65fb TT |
389 | rc = rdma_resolve_addr(id, NULL, addr, RDMA_RESOLVE_TIMEOUT); |
390 | if (rc) { | |
391 | dprintk("RPC: %s: rdma_resolve_addr() failed %i\n", | |
392 | __func__, rc); | |
393 | goto out; | |
394 | } | |
5675add3 TT |
395 | wait_for_completion_interruptible_timeout(&ia->ri_done, |
396 | msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT) + 1); | |
c56c65fb TT |
397 | rc = ia->ri_async_rc; |
398 | if (rc) | |
399 | goto out; | |
400 | ||
5675add3 | 401 | ia->ri_async_rc = -ETIMEDOUT; |
c56c65fb TT |
402 | rc = rdma_resolve_route(id, RDMA_RESOLVE_TIMEOUT); |
403 | if (rc) { | |
404 | dprintk("RPC: %s: rdma_resolve_route() failed %i\n", | |
405 | __func__, rc); | |
406 | goto out; | |
407 | } | |
5675add3 TT |
408 | wait_for_completion_interruptible_timeout(&ia->ri_done, |
409 | msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT) + 1); | |
c56c65fb TT |
410 | rc = ia->ri_async_rc; |
411 | if (rc) | |
412 | goto out; | |
413 | ||
414 | return id; | |
415 | ||
416 | out: | |
417 | rdma_destroy_id(id); | |
418 | return ERR_PTR(rc); | |
419 | } | |
420 | ||
421 | /* | |
422 | * Drain any cq, prior to teardown. | |
423 | */ | |
424 | static void | |
425 | rpcrdma_clean_cq(struct ib_cq *cq) | |
426 | { | |
427 | struct ib_wc wc; | |
428 | int count = 0; | |
429 | ||
430 | while (1 == ib_poll_cq(cq, 1, &wc)) | |
431 | ++count; | |
432 | ||
433 | if (count) | |
434 | dprintk("RPC: %s: flushed %d events (last 0x%x)\n", | |
435 | __func__, count, wc.opcode); | |
436 | } | |
437 | ||
438 | /* | |
439 | * Exported functions. | |
440 | */ | |
441 | ||
442 | /* | |
443 | * Open and initialize an Interface Adapter. | |
444 | * o initializes fields of struct rpcrdma_ia, including | |
445 | * interface and provider attributes and protection zone. | |
446 | */ | |
447 | int | |
448 | rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) | |
449 | { | |
bd7ed1d1 TT |
450 | int rc, mem_priv; |
451 | struct ib_device_attr devattr; | |
c56c65fb TT |
452 | struct rpcrdma_ia *ia = &xprt->rx_ia; |
453 | ||
c56c65fb TT |
454 | ia->ri_id = rpcrdma_create_id(xprt, ia, addr); |
455 | if (IS_ERR(ia->ri_id)) { | |
456 | rc = PTR_ERR(ia->ri_id); | |
457 | goto out1; | |
458 | } | |
459 | ||
460 | ia->ri_pd = ib_alloc_pd(ia->ri_id->device); | |
461 | if (IS_ERR(ia->ri_pd)) { | |
462 | rc = PTR_ERR(ia->ri_pd); | |
463 | dprintk("RPC: %s: ib_alloc_pd() failed %i\n", | |
464 | __func__, rc); | |
465 | goto out2; | |
466 | } | |
467 | ||
bd7ed1d1 TT |
468 | /* |
469 | * Query the device to determine if the requested memory | |
470 | * registration strategy is supported. If it isn't, set the | |
471 | * strategy to a globally supported model. | |
472 | */ | |
473 | rc = ib_query_device(ia->ri_id->device, &devattr); | |
474 | if (rc) { | |
475 | dprintk("RPC: %s: ib_query_device failed %d\n", | |
476 | __func__, rc); | |
477 | goto out2; | |
478 | } | |
479 | ||
480 | if (devattr.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY) { | |
481 | ia->ri_have_dma_lkey = 1; | |
482 | ia->ri_dma_lkey = ia->ri_id->device->local_dma_lkey; | |
483 | } | |
484 | ||
485 | switch (memreg) { | |
486 | case RPCRDMA_MEMWINDOWS: | |
487 | case RPCRDMA_MEMWINDOWS_ASYNC: | |
488 | if (!(devattr.device_cap_flags & IB_DEVICE_MEM_WINDOW)) { | |
489 | dprintk("RPC: %s: MEMWINDOWS registration " | |
490 | "specified but not supported by adapter, " | |
491 | "using slower RPCRDMA_REGISTER\n", | |
492 | __func__); | |
493 | memreg = RPCRDMA_REGISTER; | |
494 | } | |
495 | break; | |
496 | case RPCRDMA_MTHCAFMR: | |
497 | if (!ia->ri_id->device->alloc_fmr) { | |
498 | #if RPCRDMA_PERSISTENT_REGISTRATION | |
499 | dprintk("RPC: %s: MTHCAFMR registration " | |
500 | "specified but not supported by adapter, " | |
501 | "using riskier RPCRDMA_ALLPHYSICAL\n", | |
502 | __func__); | |
503 | memreg = RPCRDMA_ALLPHYSICAL; | |
504 | #else | |
505 | dprintk("RPC: %s: MTHCAFMR registration " | |
506 | "specified but not supported by adapter, " | |
507 | "using slower RPCRDMA_REGISTER\n", | |
508 | __func__); | |
509 | memreg = RPCRDMA_REGISTER; | |
3197d309 TT |
510 | #endif |
511 | } | |
512 | break; | |
513 | case RPCRDMA_FRMR: | |
514 | /* Requires both frmr reg and local dma lkey */ | |
515 | if ((devattr.device_cap_flags & | |
516 | (IB_DEVICE_MEM_MGT_EXTENSIONS|IB_DEVICE_LOCAL_DMA_LKEY)) != | |
517 | (IB_DEVICE_MEM_MGT_EXTENSIONS|IB_DEVICE_LOCAL_DMA_LKEY)) { | |
518 | #if RPCRDMA_PERSISTENT_REGISTRATION | |
519 | dprintk("RPC: %s: FRMR registration " | |
520 | "specified but not supported by adapter, " | |
521 | "using riskier RPCRDMA_ALLPHYSICAL\n", | |
522 | __func__); | |
523 | memreg = RPCRDMA_ALLPHYSICAL; | |
524 | #else | |
525 | dprintk("RPC: %s: FRMR registration " | |
526 | "specified but not supported by adapter, " | |
527 | "using slower RPCRDMA_REGISTER\n", | |
528 | __func__); | |
529 | memreg = RPCRDMA_REGISTER; | |
bd7ed1d1 TT |
530 | #endif |
531 | } | |
532 | break; | |
533 | } | |
534 | ||
c56c65fb TT |
535 | /* |
536 | * Optionally obtain an underlying physical identity mapping in | |
537 | * order to do a memory window-based bind. This base registration | |
538 | * is protected from remote access - that is enabled only by binding | |
539 | * for the specific bytes targeted during each RPC operation, and | |
540 | * revoked after the corresponding completion similar to a storage | |
541 | * adapter. | |
542 | */ | |
bd7ed1d1 TT |
543 | switch (memreg) { |
544 | case RPCRDMA_BOUNCEBUFFERS: | |
545 | case RPCRDMA_REGISTER: | |
3197d309 | 546 | case RPCRDMA_FRMR: |
bd7ed1d1 | 547 | break; |
c56c65fb | 548 | #if RPCRDMA_PERSISTENT_REGISTRATION |
bd7ed1d1 TT |
549 | case RPCRDMA_ALLPHYSICAL: |
550 | mem_priv = IB_ACCESS_LOCAL_WRITE | | |
551 | IB_ACCESS_REMOTE_WRITE | | |
552 | IB_ACCESS_REMOTE_READ; | |
553 | goto register_setup; | |
c56c65fb | 554 | #endif |
bd7ed1d1 TT |
555 | case RPCRDMA_MEMWINDOWS_ASYNC: |
556 | case RPCRDMA_MEMWINDOWS: | |
557 | mem_priv = IB_ACCESS_LOCAL_WRITE | | |
558 | IB_ACCESS_MW_BIND; | |
559 | goto register_setup; | |
560 | case RPCRDMA_MTHCAFMR: | |
561 | if (ia->ri_have_dma_lkey) | |
c56c65fb | 562 | break; |
bd7ed1d1 TT |
563 | mem_priv = IB_ACCESS_LOCAL_WRITE; |
564 | register_setup: | |
c56c65fb TT |
565 | ia->ri_bind_mem = ib_get_dma_mr(ia->ri_pd, mem_priv); |
566 | if (IS_ERR(ia->ri_bind_mem)) { | |
567 | printk(KERN_ALERT "%s: ib_get_dma_mr for " | |
568 | "phys register failed with %lX\n\t" | |
569 | "Will continue with degraded performance\n", | |
570 | __func__, PTR_ERR(ia->ri_bind_mem)); | |
571 | memreg = RPCRDMA_REGISTER; | |
572 | ia->ri_bind_mem = NULL; | |
573 | } | |
bd7ed1d1 TT |
574 | break; |
575 | default: | |
576 | printk(KERN_ERR "%s: invalid memory registration mode %d\n", | |
577 | __func__, memreg); | |
578 | rc = -EINVAL; | |
579 | goto out2; | |
c56c65fb | 580 | } |
bd7ed1d1 TT |
581 | dprintk("RPC: %s: memory registration strategy is %d\n", |
582 | __func__, memreg); | |
c56c65fb TT |
583 | |
584 | /* Else will do memory reg/dereg for each chunk */ | |
585 | ia->ri_memreg_strategy = memreg; | |
586 | ||
587 | return 0; | |
588 | out2: | |
589 | rdma_destroy_id(ia->ri_id); | |
fee08caf | 590 | ia->ri_id = NULL; |
c56c65fb TT |
591 | out1: |
592 | return rc; | |
593 | } | |
594 | ||
595 | /* | |
596 | * Clean up/close an IA. | |
597 | * o if event handles and PD have been initialized, free them. | |
598 | * o close the IA | |
599 | */ | |
600 | void | |
601 | rpcrdma_ia_close(struct rpcrdma_ia *ia) | |
602 | { | |
603 | int rc; | |
604 | ||
605 | dprintk("RPC: %s: entering\n", __func__); | |
606 | if (ia->ri_bind_mem != NULL) { | |
607 | rc = ib_dereg_mr(ia->ri_bind_mem); | |
608 | dprintk("RPC: %s: ib_dereg_mr returned %i\n", | |
609 | __func__, rc); | |
610 | } | |
fee08caf TT |
611 | if (ia->ri_id != NULL && !IS_ERR(ia->ri_id)) { |
612 | if (ia->ri_id->qp) | |
613 | rdma_destroy_qp(ia->ri_id); | |
614 | rdma_destroy_id(ia->ri_id); | |
615 | ia->ri_id = NULL; | |
616 | } | |
c56c65fb TT |
617 | if (ia->ri_pd != NULL && !IS_ERR(ia->ri_pd)) { |
618 | rc = ib_dealloc_pd(ia->ri_pd); | |
619 | dprintk("RPC: %s: ib_dealloc_pd returned %i\n", | |
620 | __func__, rc); | |
621 | } | |
c56c65fb TT |
622 | } |
623 | ||
624 | /* | |
625 | * Create unconnected endpoint. | |
626 | */ | |
627 | int | |
628 | rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, | |
629 | struct rpcrdma_create_data_internal *cdata) | |
630 | { | |
631 | struct ib_device_attr devattr; | |
5d40a8a5 | 632 | int rc, err; |
c56c65fb TT |
633 | |
634 | rc = ib_query_device(ia->ri_id->device, &devattr); | |
635 | if (rc) { | |
636 | dprintk("RPC: %s: ib_query_device failed %d\n", | |
637 | __func__, rc); | |
638 | return rc; | |
639 | } | |
640 | ||
641 | /* check provider's send/recv wr limits */ | |
642 | if (cdata->max_requests > devattr.max_qp_wr) | |
643 | cdata->max_requests = devattr.max_qp_wr; | |
644 | ||
645 | ep->rep_attr.event_handler = rpcrdma_qp_async_error_upcall; | |
646 | ep->rep_attr.qp_context = ep; | |
647 | /* send_cq and recv_cq initialized below */ | |
648 | ep->rep_attr.srq = NULL; | |
649 | ep->rep_attr.cap.max_send_wr = cdata->max_requests; | |
650 | switch (ia->ri_memreg_strategy) { | |
3197d309 TT |
651 | case RPCRDMA_FRMR: |
652 | /* Add room for frmr register and invalidate WRs */ | |
653 | ep->rep_attr.cap.max_send_wr *= 3; | |
654 | if (ep->rep_attr.cap.max_send_wr > devattr.max_qp_wr) | |
655 | return -EINVAL; | |
656 | break; | |
c56c65fb TT |
657 | case RPCRDMA_MEMWINDOWS_ASYNC: |
658 | case RPCRDMA_MEMWINDOWS: | |
659 | /* Add room for mw_binds+unbinds - overkill! */ | |
660 | ep->rep_attr.cap.max_send_wr++; | |
661 | ep->rep_attr.cap.max_send_wr *= (2 * RPCRDMA_MAX_SEGS); | |
662 | if (ep->rep_attr.cap.max_send_wr > devattr.max_qp_wr) | |
663 | return -EINVAL; | |
664 | break; | |
665 | default: | |
666 | break; | |
667 | } | |
668 | ep->rep_attr.cap.max_recv_wr = cdata->max_requests; | |
669 | ep->rep_attr.cap.max_send_sge = (cdata->padding ? 4 : 2); | |
670 | ep->rep_attr.cap.max_recv_sge = 1; | |
671 | ep->rep_attr.cap.max_inline_data = 0; | |
672 | ep->rep_attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
673 | ep->rep_attr.qp_type = IB_QPT_RC; | |
674 | ep->rep_attr.port_num = ~0; | |
675 | ||
676 | dprintk("RPC: %s: requested max: dtos: send %d recv %d; " | |
677 | "iovs: send %d recv %d\n", | |
678 | __func__, | |
679 | ep->rep_attr.cap.max_send_wr, | |
680 | ep->rep_attr.cap.max_recv_wr, | |
681 | ep->rep_attr.cap.max_send_sge, | |
682 | ep->rep_attr.cap.max_recv_sge); | |
683 | ||
684 | /* set trigger for requesting send completion */ | |
685 | ep->rep_cqinit = ep->rep_attr.cap.max_send_wr/2 /* - 1*/; | |
686 | switch (ia->ri_memreg_strategy) { | |
687 | case RPCRDMA_MEMWINDOWS_ASYNC: | |
688 | case RPCRDMA_MEMWINDOWS: | |
689 | ep->rep_cqinit -= RPCRDMA_MAX_SEGS; | |
690 | break; | |
691 | default: | |
692 | break; | |
693 | } | |
694 | if (ep->rep_cqinit <= 2) | |
695 | ep->rep_cqinit = 0; | |
696 | INIT_CQCOUNT(ep); | |
697 | ep->rep_ia = ia; | |
698 | init_waitqueue_head(&ep->rep_connect_wait); | |
699 | ||
700 | /* | |
701 | * Create a single cq for receive dto and mw_bind (only ever | |
702 | * care about unbind, really). Send completions are suppressed. | |
703 | * Use single threaded tasklet upcalls to maintain ordering. | |
704 | */ | |
705 | ep->rep_cq = ib_create_cq(ia->ri_id->device, rpcrdma_cq_event_upcall, | |
706 | rpcrdma_cq_async_error_upcall, NULL, | |
707 | ep->rep_attr.cap.max_recv_wr + | |
708 | ep->rep_attr.cap.max_send_wr + 1, 0); | |
709 | if (IS_ERR(ep->rep_cq)) { | |
710 | rc = PTR_ERR(ep->rep_cq); | |
711 | dprintk("RPC: %s: ib_create_cq failed: %i\n", | |
712 | __func__, rc); | |
713 | goto out1; | |
714 | } | |
715 | ||
716 | rc = ib_req_notify_cq(ep->rep_cq, IB_CQ_NEXT_COMP); | |
717 | if (rc) { | |
718 | dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", | |
719 | __func__, rc); | |
720 | goto out2; | |
721 | } | |
722 | ||
723 | ep->rep_attr.send_cq = ep->rep_cq; | |
724 | ep->rep_attr.recv_cq = ep->rep_cq; | |
725 | ||
726 | /* Initialize cma parameters */ | |
727 | ||
728 | /* RPC/RDMA does not use private data */ | |
729 | ep->rep_remote_cma.private_data = NULL; | |
730 | ep->rep_remote_cma.private_data_len = 0; | |
731 | ||
732 | /* Client offers RDMA Read but does not initiate */ | |
b334eaab TT |
733 | ep->rep_remote_cma.initiator_depth = 0; |
734 | if (ia->ri_memreg_strategy == RPCRDMA_BOUNCEBUFFERS) | |
c56c65fb | 735 | ep->rep_remote_cma.responder_resources = 0; |
b334eaab TT |
736 | else if (devattr.max_qp_rd_atom > 32) /* arbitrary but <= 255 */ |
737 | ep->rep_remote_cma.responder_resources = 32; | |
738 | else | |
c56c65fb | 739 | ep->rep_remote_cma.responder_resources = devattr.max_qp_rd_atom; |
c56c65fb TT |
740 | |
741 | ep->rep_remote_cma.retry_count = 7; | |
742 | ep->rep_remote_cma.flow_control = 0; | |
743 | ep->rep_remote_cma.rnr_retry_count = 0; | |
744 | ||
745 | return 0; | |
746 | ||
747 | out2: | |
5d40a8a5 CL |
748 | err = ib_destroy_cq(ep->rep_cq); |
749 | if (err) | |
750 | dprintk("RPC: %s: ib_destroy_cq returned %i\n", | |
751 | __func__, err); | |
c56c65fb TT |
752 | out1: |
753 | return rc; | |
754 | } | |
755 | ||
756 | /* | |
757 | * rpcrdma_ep_destroy | |
758 | * | |
759 | * Disconnect and destroy endpoint. After this, the only | |
760 | * valid operations on the ep are to free it (if dynamically | |
761 | * allocated) or re-create it. | |
762 | * | |
763 | * The caller's error handling must be sure to not leak the endpoint | |
764 | * if this function fails. | |
765 | */ | |
766 | int | |
767 | rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) | |
768 | { | |
769 | int rc; | |
770 | ||
771 | dprintk("RPC: %s: entering, connected is %d\n", | |
772 | __func__, ep->rep_connected); | |
773 | ||
774 | if (ia->ri_id->qp) { | |
775 | rc = rpcrdma_ep_disconnect(ep, ia); | |
776 | if (rc) | |
777 | dprintk("RPC: %s: rpcrdma_ep_disconnect" | |
778 | " returned %i\n", __func__, rc); | |
fee08caf TT |
779 | rdma_destroy_qp(ia->ri_id); |
780 | ia->ri_id->qp = NULL; | |
c56c65fb TT |
781 | } |
782 | ||
c56c65fb TT |
783 | /* padding - could be done in rpcrdma_buffer_destroy... */ |
784 | if (ep->rep_pad_mr) { | |
785 | rpcrdma_deregister_internal(ia, ep->rep_pad_mr, &ep->rep_pad); | |
786 | ep->rep_pad_mr = NULL; | |
787 | } | |
788 | ||
c56c65fb TT |
789 | rpcrdma_clean_cq(ep->rep_cq); |
790 | rc = ib_destroy_cq(ep->rep_cq); | |
791 | if (rc) | |
792 | dprintk("RPC: %s: ib_destroy_cq returned %i\n", | |
793 | __func__, rc); | |
794 | ||
795 | return rc; | |
796 | } | |
797 | ||
798 | /* | |
799 | * Connect unconnected endpoint. | |
800 | */ | |
801 | int | |
802 | rpcrdma_ep_connect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) | |
803 | { | |
804 | struct rdma_cm_id *id; | |
805 | int rc = 0; | |
806 | int retry_count = 0; | |
807 | int reconnect = (ep->rep_connected != 0); | |
808 | ||
809 | if (reconnect) { | |
810 | struct rpcrdma_xprt *xprt; | |
811 | retry: | |
812 | rc = rpcrdma_ep_disconnect(ep, ia); | |
813 | if (rc && rc != -ENOTCONN) | |
814 | dprintk("RPC: %s: rpcrdma_ep_disconnect" | |
815 | " status %i\n", __func__, rc); | |
816 | rpcrdma_clean_cq(ep->rep_cq); | |
817 | ||
818 | xprt = container_of(ia, struct rpcrdma_xprt, rx_ia); | |
819 | id = rpcrdma_create_id(xprt, ia, | |
820 | (struct sockaddr *)&xprt->rx_data.addr); | |
821 | if (IS_ERR(id)) { | |
822 | rc = PTR_ERR(id); | |
823 | goto out; | |
824 | } | |
825 | /* TEMP TEMP TEMP - fail if new device: | |
826 | * Deregister/remarshal *all* requests! | |
827 | * Close and recreate adapter, pd, etc! | |
828 | * Re-determine all attributes still sane! | |
829 | * More stuff I haven't thought of! | |
830 | * Rrrgh! | |
831 | */ | |
832 | if (ia->ri_id->device != id->device) { | |
833 | printk("RPC: %s: can't reconnect on " | |
834 | "different device!\n", __func__); | |
835 | rdma_destroy_id(id); | |
836 | rc = -ENETDOWN; | |
837 | goto out; | |
838 | } | |
839 | /* END TEMP */ | |
1a954051 | 840 | rdma_destroy_qp(ia->ri_id); |
c56c65fb TT |
841 | rdma_destroy_id(ia->ri_id); |
842 | ia->ri_id = id; | |
843 | } | |
844 | ||
845 | rc = rdma_create_qp(ia->ri_id, ia->ri_pd, &ep->rep_attr); | |
846 | if (rc) { | |
847 | dprintk("RPC: %s: rdma_create_qp failed %i\n", | |
848 | __func__, rc); | |
849 | goto out; | |
850 | } | |
851 | ||
852 | /* XXX Tavor device performs badly with 2K MTU! */ | |
853 | if (strnicmp(ia->ri_id->device->dma_device->bus->name, "pci", 3) == 0) { | |
854 | struct pci_dev *pcid = to_pci_dev(ia->ri_id->device->dma_device); | |
855 | if (pcid->device == PCI_DEVICE_ID_MELLANOX_TAVOR && | |
856 | (pcid->vendor == PCI_VENDOR_ID_MELLANOX || | |
857 | pcid->vendor == PCI_VENDOR_ID_TOPSPIN)) { | |
858 | struct ib_qp_attr attr = { | |
859 | .path_mtu = IB_MTU_1024 | |
860 | }; | |
861 | rc = ib_modify_qp(ia->ri_id->qp, &attr, IB_QP_PATH_MTU); | |
862 | } | |
863 | } | |
864 | ||
c56c65fb TT |
865 | ep->rep_connected = 0; |
866 | ||
867 | rc = rdma_connect(ia->ri_id, &ep->rep_remote_cma); | |
868 | if (rc) { | |
869 | dprintk("RPC: %s: rdma_connect() failed with %i\n", | |
870 | __func__, rc); | |
871 | goto out; | |
872 | } | |
873 | ||
874 | if (reconnect) | |
875 | return 0; | |
876 | ||
877 | wait_event_interruptible(ep->rep_connect_wait, ep->rep_connected != 0); | |
878 | ||
879 | /* | |
880 | * Check state. A non-peer reject indicates no listener | |
881 | * (ECONNREFUSED), which may be a transient state. All | |
882 | * others indicate a transport condition which has already | |
883 | * undergone a best-effort. | |
884 | */ | |
885 | if (ep->rep_connected == -ECONNREFUSED | |
886 | && ++retry_count <= RDMA_CONNECT_RETRY_MAX) { | |
887 | dprintk("RPC: %s: non-peer_reject, retry\n", __func__); | |
888 | goto retry; | |
889 | } | |
890 | if (ep->rep_connected <= 0) { | |
891 | /* Sometimes, the only way to reliably connect to remote | |
892 | * CMs is to use same nonzero values for ORD and IRD. */ | |
b334eaab TT |
893 | if (retry_count++ <= RDMA_CONNECT_RETRY_MAX + 1 && |
894 | (ep->rep_remote_cma.responder_resources == 0 || | |
895 | ep->rep_remote_cma.initiator_depth != | |
896 | ep->rep_remote_cma.responder_resources)) { | |
897 | if (ep->rep_remote_cma.responder_resources == 0) | |
898 | ep->rep_remote_cma.responder_resources = 1; | |
899 | ep->rep_remote_cma.initiator_depth = | |
900 | ep->rep_remote_cma.responder_resources; | |
c56c65fb | 901 | goto retry; |
b334eaab | 902 | } |
c56c65fb TT |
903 | rc = ep->rep_connected; |
904 | } else { | |
905 | dprintk("RPC: %s: connected\n", __func__); | |
906 | } | |
907 | ||
908 | out: | |
909 | if (rc) | |
910 | ep->rep_connected = rc; | |
911 | return rc; | |
912 | } | |
913 | ||
914 | /* | |
915 | * rpcrdma_ep_disconnect | |
916 | * | |
917 | * This is separate from destroy to facilitate the ability | |
918 | * to reconnect without recreating the endpoint. | |
919 | * | |
920 | * This call is not reentrant, and must not be made in parallel | |
921 | * on the same endpoint. | |
922 | */ | |
923 | int | |
924 | rpcrdma_ep_disconnect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) | |
925 | { | |
926 | int rc; | |
927 | ||
928 | rpcrdma_clean_cq(ep->rep_cq); | |
929 | rc = rdma_disconnect(ia->ri_id); | |
930 | if (!rc) { | |
931 | /* returns without wait if not connected */ | |
932 | wait_event_interruptible(ep->rep_connect_wait, | |
933 | ep->rep_connected != 1); | |
934 | dprintk("RPC: %s: after wait, %sconnected\n", __func__, | |
935 | (ep->rep_connected == 1) ? "still " : "dis"); | |
936 | } else { | |
937 | dprintk("RPC: %s: rdma_disconnect %i\n", __func__, rc); | |
938 | ep->rep_connected = rc; | |
939 | } | |
940 | return rc; | |
941 | } | |
942 | ||
943 | /* | |
944 | * Initialize buffer memory | |
945 | */ | |
946 | int | |
947 | rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, | |
948 | struct rpcrdma_ia *ia, struct rpcrdma_create_data_internal *cdata) | |
949 | { | |
950 | char *p; | |
951 | size_t len; | |
952 | int i, rc; | |
8d4ba034 | 953 | struct rpcrdma_mw *r; |
c56c65fb TT |
954 | |
955 | buf->rb_max_requests = cdata->max_requests; | |
956 | spin_lock_init(&buf->rb_lock); | |
957 | atomic_set(&buf->rb_credits, 1); | |
958 | ||
959 | /* Need to allocate: | |
960 | * 1. arrays for send and recv pointers | |
961 | * 2. arrays of struct rpcrdma_req to fill in pointers | |
962 | * 3. array of struct rpcrdma_rep for replies | |
963 | * 4. padding, if any | |
3197d309 | 964 | * 5. mw's, fmr's or frmr's, if any |
c56c65fb TT |
965 | * Send/recv buffers in req/rep need to be registered |
966 | */ | |
967 | ||
968 | len = buf->rb_max_requests * | |
969 | (sizeof(struct rpcrdma_req *) + sizeof(struct rpcrdma_rep *)); | |
970 | len += cdata->padding; | |
971 | switch (ia->ri_memreg_strategy) { | |
3197d309 TT |
972 | case RPCRDMA_FRMR: |
973 | len += buf->rb_max_requests * RPCRDMA_MAX_SEGS * | |
974 | sizeof(struct rpcrdma_mw); | |
975 | break; | |
c56c65fb TT |
976 | case RPCRDMA_MTHCAFMR: |
977 | /* TBD we are perhaps overallocating here */ | |
978 | len += (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS * | |
979 | sizeof(struct rpcrdma_mw); | |
980 | break; | |
981 | case RPCRDMA_MEMWINDOWS_ASYNC: | |
982 | case RPCRDMA_MEMWINDOWS: | |
983 | len += (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS * | |
984 | sizeof(struct rpcrdma_mw); | |
985 | break; | |
986 | default: | |
987 | break; | |
988 | } | |
989 | ||
990 | /* allocate 1, 4 and 5 in one shot */ | |
991 | p = kzalloc(len, GFP_KERNEL); | |
992 | if (p == NULL) { | |
993 | dprintk("RPC: %s: req_t/rep_t/pad kzalloc(%zd) failed\n", | |
994 | __func__, len); | |
995 | rc = -ENOMEM; | |
996 | goto out; | |
997 | } | |
998 | buf->rb_pool = p; /* for freeing it later */ | |
999 | ||
1000 | buf->rb_send_bufs = (struct rpcrdma_req **) p; | |
1001 | p = (char *) &buf->rb_send_bufs[buf->rb_max_requests]; | |
1002 | buf->rb_recv_bufs = (struct rpcrdma_rep **) p; | |
1003 | p = (char *) &buf->rb_recv_bufs[buf->rb_max_requests]; | |
1004 | ||
1005 | /* | |
1006 | * Register the zeroed pad buffer, if any. | |
1007 | */ | |
1008 | if (cdata->padding) { | |
1009 | rc = rpcrdma_register_internal(ia, p, cdata->padding, | |
1010 | &ep->rep_pad_mr, &ep->rep_pad); | |
1011 | if (rc) | |
1012 | goto out; | |
1013 | } | |
1014 | p += cdata->padding; | |
1015 | ||
1016 | /* | |
1017 | * Allocate the fmr's, or mw's for mw_bind chunk registration. | |
1018 | * We "cycle" the mw's in order to minimize rkey reuse, | |
1019 | * and also reduce unbind-to-bind collision. | |
1020 | */ | |
1021 | INIT_LIST_HEAD(&buf->rb_mws); | |
8d4ba034 | 1022 | r = (struct rpcrdma_mw *)p; |
c56c65fb | 1023 | switch (ia->ri_memreg_strategy) { |
3197d309 TT |
1024 | case RPCRDMA_FRMR: |
1025 | for (i = buf->rb_max_requests * RPCRDMA_MAX_SEGS; i; i--) { | |
1026 | r->r.frmr.fr_mr = ib_alloc_fast_reg_mr(ia->ri_pd, | |
1027 | RPCRDMA_MAX_SEGS); | |
1028 | if (IS_ERR(r->r.frmr.fr_mr)) { | |
1029 | rc = PTR_ERR(r->r.frmr.fr_mr); | |
1030 | dprintk("RPC: %s: ib_alloc_fast_reg_mr" | |
1031 | " failed %i\n", __func__, rc); | |
1032 | goto out; | |
1033 | } | |
1034 | r->r.frmr.fr_pgl = | |
1035 | ib_alloc_fast_reg_page_list(ia->ri_id->device, | |
1036 | RPCRDMA_MAX_SEGS); | |
1037 | if (IS_ERR(r->r.frmr.fr_pgl)) { | |
1038 | rc = PTR_ERR(r->r.frmr.fr_pgl); | |
1039 | dprintk("RPC: %s: " | |
1040 | "ib_alloc_fast_reg_page_list " | |
1041 | "failed %i\n", __func__, rc); | |
1042 | goto out; | |
1043 | } | |
1044 | list_add(&r->mw_list, &buf->rb_mws); | |
1045 | ++r; | |
1046 | } | |
1047 | break; | |
c56c65fb | 1048 | case RPCRDMA_MTHCAFMR: |
c56c65fb TT |
1049 | /* TBD we are perhaps overallocating here */ |
1050 | for (i = (buf->rb_max_requests+1) * RPCRDMA_MAX_SEGS; i; i--) { | |
8d4ba034 TT |
1051 | static struct ib_fmr_attr fa = |
1052 | { RPCRDMA_MAX_DATA_SEGS, 1, PAGE_SHIFT }; | |
c56c65fb TT |
1053 | r->r.fmr = ib_alloc_fmr(ia->ri_pd, |
1054 | IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ, | |
1055 | &fa); | |
1056 | if (IS_ERR(r->r.fmr)) { | |
1057 | rc = PTR_ERR(r->r.fmr); | |
1058 | dprintk("RPC: %s: ib_alloc_fmr" | |
1059 | " failed %i\n", __func__, rc); | |
1060 | goto out; | |
1061 | } | |
1062 | list_add(&r->mw_list, &buf->rb_mws); | |
1063 | ++r; | |
1064 | } | |
c56c65fb TT |
1065 | break; |
1066 | case RPCRDMA_MEMWINDOWS_ASYNC: | |
1067 | case RPCRDMA_MEMWINDOWS: | |
c56c65fb TT |
1068 | /* Allocate one extra request's worth, for full cycling */ |
1069 | for (i = (buf->rb_max_requests+1) * RPCRDMA_MAX_SEGS; i; i--) { | |
1070 | r->r.mw = ib_alloc_mw(ia->ri_pd); | |
1071 | if (IS_ERR(r->r.mw)) { | |
1072 | rc = PTR_ERR(r->r.mw); | |
1073 | dprintk("RPC: %s: ib_alloc_mw" | |
1074 | " failed %i\n", __func__, rc); | |
1075 | goto out; | |
1076 | } | |
1077 | list_add(&r->mw_list, &buf->rb_mws); | |
1078 | ++r; | |
1079 | } | |
c56c65fb TT |
1080 | break; |
1081 | default: | |
1082 | break; | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * Allocate/init the request/reply buffers. Doing this | |
1087 | * using kmalloc for now -- one for each buf. | |
1088 | */ | |
1089 | for (i = 0; i < buf->rb_max_requests; i++) { | |
1090 | struct rpcrdma_req *req; | |
1091 | struct rpcrdma_rep *rep; | |
1092 | ||
1093 | len = cdata->inline_wsize + sizeof(struct rpcrdma_req); | |
1094 | /* RPC layer requests *double* size + 1K RPC_SLACK_SPACE! */ | |
1095 | /* Typical ~2400b, so rounding up saves work later */ | |
1096 | if (len < 4096) | |
1097 | len = 4096; | |
1098 | req = kmalloc(len, GFP_KERNEL); | |
1099 | if (req == NULL) { | |
1100 | dprintk("RPC: %s: request buffer %d alloc" | |
1101 | " failed\n", __func__, i); | |
1102 | rc = -ENOMEM; | |
1103 | goto out; | |
1104 | } | |
1105 | memset(req, 0, sizeof(struct rpcrdma_req)); | |
1106 | buf->rb_send_bufs[i] = req; | |
1107 | buf->rb_send_bufs[i]->rl_buffer = buf; | |
1108 | ||
1109 | rc = rpcrdma_register_internal(ia, req->rl_base, | |
1110 | len - offsetof(struct rpcrdma_req, rl_base), | |
1111 | &buf->rb_send_bufs[i]->rl_handle, | |
1112 | &buf->rb_send_bufs[i]->rl_iov); | |
1113 | if (rc) | |
1114 | goto out; | |
1115 | ||
1116 | buf->rb_send_bufs[i]->rl_size = len-sizeof(struct rpcrdma_req); | |
1117 | ||
1118 | len = cdata->inline_rsize + sizeof(struct rpcrdma_rep); | |
1119 | rep = kmalloc(len, GFP_KERNEL); | |
1120 | if (rep == NULL) { | |
1121 | dprintk("RPC: %s: reply buffer %d alloc failed\n", | |
1122 | __func__, i); | |
1123 | rc = -ENOMEM; | |
1124 | goto out; | |
1125 | } | |
1126 | memset(rep, 0, sizeof(struct rpcrdma_rep)); | |
1127 | buf->rb_recv_bufs[i] = rep; | |
1128 | buf->rb_recv_bufs[i]->rr_buffer = buf; | |
1129 | init_waitqueue_head(&rep->rr_unbind); | |
1130 | ||
1131 | rc = rpcrdma_register_internal(ia, rep->rr_base, | |
1132 | len - offsetof(struct rpcrdma_rep, rr_base), | |
1133 | &buf->rb_recv_bufs[i]->rr_handle, | |
1134 | &buf->rb_recv_bufs[i]->rr_iov); | |
1135 | if (rc) | |
1136 | goto out; | |
1137 | ||
1138 | } | |
1139 | dprintk("RPC: %s: max_requests %d\n", | |
1140 | __func__, buf->rb_max_requests); | |
1141 | /* done */ | |
1142 | return 0; | |
1143 | out: | |
1144 | rpcrdma_buffer_destroy(buf); | |
1145 | return rc; | |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * Unregister and destroy buffer memory. Need to deal with | |
1150 | * partial initialization, so it's callable from failed create. | |
1151 | * Must be called before destroying endpoint, as registrations | |
1152 | * reference it. | |
1153 | */ | |
1154 | void | |
1155 | rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf) | |
1156 | { | |
1157 | int rc, i; | |
1158 | struct rpcrdma_ia *ia = rdmab_to_ia(buf); | |
8d4ba034 | 1159 | struct rpcrdma_mw *r; |
c56c65fb TT |
1160 | |
1161 | /* clean up in reverse order from create | |
1162 | * 1. recv mr memory (mr free, then kfree) | |
1163 | * 1a. bind mw memory | |
1164 | * 2. send mr memory (mr free, then kfree) | |
1165 | * 3. padding (if any) [moved to rpcrdma_ep_destroy] | |
1166 | * 4. arrays | |
1167 | */ | |
1168 | dprintk("RPC: %s: entering\n", __func__); | |
1169 | ||
1170 | for (i = 0; i < buf->rb_max_requests; i++) { | |
1171 | if (buf->rb_recv_bufs && buf->rb_recv_bufs[i]) { | |
1172 | rpcrdma_deregister_internal(ia, | |
1173 | buf->rb_recv_bufs[i]->rr_handle, | |
1174 | &buf->rb_recv_bufs[i]->rr_iov); | |
1175 | kfree(buf->rb_recv_bufs[i]); | |
1176 | } | |
1177 | if (buf->rb_send_bufs && buf->rb_send_bufs[i]) { | |
1178 | while (!list_empty(&buf->rb_mws)) { | |
c56c65fb TT |
1179 | r = list_entry(buf->rb_mws.next, |
1180 | struct rpcrdma_mw, mw_list); | |
1181 | list_del(&r->mw_list); | |
1182 | switch (ia->ri_memreg_strategy) { | |
3197d309 TT |
1183 | case RPCRDMA_FRMR: |
1184 | rc = ib_dereg_mr(r->r.frmr.fr_mr); | |
1185 | if (rc) | |
1186 | dprintk("RPC: %s:" | |
1187 | " ib_dereg_mr" | |
1188 | " failed %i\n", | |
1189 | __func__, rc); | |
1190 | ib_free_fast_reg_page_list(r->r.frmr.fr_pgl); | |
1191 | break; | |
c56c65fb TT |
1192 | case RPCRDMA_MTHCAFMR: |
1193 | rc = ib_dealloc_fmr(r->r.fmr); | |
1194 | if (rc) | |
1195 | dprintk("RPC: %s:" | |
1196 | " ib_dealloc_fmr" | |
1197 | " failed %i\n", | |
1198 | __func__, rc); | |
1199 | break; | |
1200 | case RPCRDMA_MEMWINDOWS_ASYNC: | |
1201 | case RPCRDMA_MEMWINDOWS: | |
1202 | rc = ib_dealloc_mw(r->r.mw); | |
1203 | if (rc) | |
1204 | dprintk("RPC: %s:" | |
1205 | " ib_dealloc_mw" | |
1206 | " failed %i\n", | |
1207 | __func__, rc); | |
1208 | break; | |
1209 | default: | |
1210 | break; | |
1211 | } | |
1212 | } | |
1213 | rpcrdma_deregister_internal(ia, | |
1214 | buf->rb_send_bufs[i]->rl_handle, | |
1215 | &buf->rb_send_bufs[i]->rl_iov); | |
1216 | kfree(buf->rb_send_bufs[i]); | |
1217 | } | |
1218 | } | |
1219 | ||
1220 | kfree(buf->rb_pool); | |
1221 | } | |
1222 | ||
1223 | /* | |
1224 | * Get a set of request/reply buffers. | |
1225 | * | |
1226 | * Reply buffer (if needed) is attached to send buffer upon return. | |
1227 | * Rule: | |
1228 | * rb_send_index and rb_recv_index MUST always be pointing to the | |
1229 | * *next* available buffer (non-NULL). They are incremented after | |
1230 | * removing buffers, and decremented *before* returning them. | |
1231 | */ | |
1232 | struct rpcrdma_req * | |
1233 | rpcrdma_buffer_get(struct rpcrdma_buffer *buffers) | |
1234 | { | |
1235 | struct rpcrdma_req *req; | |
1236 | unsigned long flags; | |
8d4ba034 TT |
1237 | int i; |
1238 | struct rpcrdma_mw *r; | |
c56c65fb TT |
1239 | |
1240 | spin_lock_irqsave(&buffers->rb_lock, flags); | |
1241 | if (buffers->rb_send_index == buffers->rb_max_requests) { | |
1242 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1243 | dprintk("RPC: %s: out of request buffers\n", __func__); | |
1244 | return ((struct rpcrdma_req *)NULL); | |
1245 | } | |
1246 | ||
1247 | req = buffers->rb_send_bufs[buffers->rb_send_index]; | |
1248 | if (buffers->rb_send_index < buffers->rb_recv_index) { | |
1249 | dprintk("RPC: %s: %d extra receives outstanding (ok)\n", | |
1250 | __func__, | |
1251 | buffers->rb_recv_index - buffers->rb_send_index); | |
1252 | req->rl_reply = NULL; | |
1253 | } else { | |
1254 | req->rl_reply = buffers->rb_recv_bufs[buffers->rb_recv_index]; | |
1255 | buffers->rb_recv_bufs[buffers->rb_recv_index++] = NULL; | |
1256 | } | |
1257 | buffers->rb_send_bufs[buffers->rb_send_index++] = NULL; | |
1258 | if (!list_empty(&buffers->rb_mws)) { | |
8d4ba034 | 1259 | i = RPCRDMA_MAX_SEGS - 1; |
c56c65fb | 1260 | do { |
c56c65fb TT |
1261 | r = list_entry(buffers->rb_mws.next, |
1262 | struct rpcrdma_mw, mw_list); | |
1263 | list_del(&r->mw_list); | |
1264 | req->rl_segments[i].mr_chunk.rl_mw = r; | |
1265 | } while (--i >= 0); | |
1266 | } | |
1267 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1268 | return req; | |
1269 | } | |
1270 | ||
1271 | /* | |
1272 | * Put request/reply buffers back into pool. | |
1273 | * Pre-decrement counter/array index. | |
1274 | */ | |
1275 | void | |
1276 | rpcrdma_buffer_put(struct rpcrdma_req *req) | |
1277 | { | |
1278 | struct rpcrdma_buffer *buffers = req->rl_buffer; | |
1279 | struct rpcrdma_ia *ia = rdmab_to_ia(buffers); | |
1280 | int i; | |
1281 | unsigned long flags; | |
1282 | ||
1283 | BUG_ON(req->rl_nchunks != 0); | |
1284 | spin_lock_irqsave(&buffers->rb_lock, flags); | |
1285 | buffers->rb_send_bufs[--buffers->rb_send_index] = req; | |
1286 | req->rl_niovs = 0; | |
1287 | if (req->rl_reply) { | |
1288 | buffers->rb_recv_bufs[--buffers->rb_recv_index] = req->rl_reply; | |
1289 | init_waitqueue_head(&req->rl_reply->rr_unbind); | |
1290 | req->rl_reply->rr_func = NULL; | |
1291 | req->rl_reply = NULL; | |
1292 | } | |
1293 | switch (ia->ri_memreg_strategy) { | |
3197d309 | 1294 | case RPCRDMA_FRMR: |
c56c65fb TT |
1295 | case RPCRDMA_MTHCAFMR: |
1296 | case RPCRDMA_MEMWINDOWS_ASYNC: | |
1297 | case RPCRDMA_MEMWINDOWS: | |
1298 | /* | |
1299 | * Cycle mw's back in reverse order, and "spin" them. | |
1300 | * This delays and scrambles reuse as much as possible. | |
1301 | */ | |
1302 | i = 1; | |
1303 | do { | |
1304 | struct rpcrdma_mw **mw; | |
1305 | mw = &req->rl_segments[i].mr_chunk.rl_mw; | |
1306 | list_add_tail(&(*mw)->mw_list, &buffers->rb_mws); | |
1307 | *mw = NULL; | |
1308 | } while (++i < RPCRDMA_MAX_SEGS); | |
1309 | list_add_tail(&req->rl_segments[0].mr_chunk.rl_mw->mw_list, | |
1310 | &buffers->rb_mws); | |
1311 | req->rl_segments[0].mr_chunk.rl_mw = NULL; | |
1312 | break; | |
1313 | default: | |
1314 | break; | |
1315 | } | |
1316 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * Recover reply buffers from pool. | |
1321 | * This happens when recovering from error conditions. | |
1322 | * Post-increment counter/array index. | |
1323 | */ | |
1324 | void | |
1325 | rpcrdma_recv_buffer_get(struct rpcrdma_req *req) | |
1326 | { | |
1327 | struct rpcrdma_buffer *buffers = req->rl_buffer; | |
1328 | unsigned long flags; | |
1329 | ||
1330 | if (req->rl_iov.length == 0) /* special case xprt_rdma_allocate() */ | |
1331 | buffers = ((struct rpcrdma_req *) buffers)->rl_buffer; | |
1332 | spin_lock_irqsave(&buffers->rb_lock, flags); | |
1333 | if (buffers->rb_recv_index < buffers->rb_max_requests) { | |
1334 | req->rl_reply = buffers->rb_recv_bufs[buffers->rb_recv_index]; | |
1335 | buffers->rb_recv_bufs[buffers->rb_recv_index++] = NULL; | |
1336 | } | |
1337 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1338 | } | |
1339 | ||
1340 | /* | |
1341 | * Put reply buffers back into pool when not attached to | |
1342 | * request. This happens in error conditions, and when | |
1343 | * aborting unbinds. Pre-decrement counter/array index. | |
1344 | */ | |
1345 | void | |
1346 | rpcrdma_recv_buffer_put(struct rpcrdma_rep *rep) | |
1347 | { | |
1348 | struct rpcrdma_buffer *buffers = rep->rr_buffer; | |
1349 | unsigned long flags; | |
1350 | ||
1351 | rep->rr_func = NULL; | |
1352 | spin_lock_irqsave(&buffers->rb_lock, flags); | |
1353 | buffers->rb_recv_bufs[--buffers->rb_recv_index] = rep; | |
1354 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1355 | } | |
1356 | ||
1357 | /* | |
1358 | * Wrappers for internal-use kmalloc memory registration, used by buffer code. | |
1359 | */ | |
1360 | ||
1361 | int | |
1362 | rpcrdma_register_internal(struct rpcrdma_ia *ia, void *va, int len, | |
1363 | struct ib_mr **mrp, struct ib_sge *iov) | |
1364 | { | |
1365 | struct ib_phys_buf ipb; | |
1366 | struct ib_mr *mr; | |
1367 | int rc; | |
1368 | ||
1369 | /* | |
1370 | * All memory passed here was kmalloc'ed, therefore phys-contiguous. | |
1371 | */ | |
1372 | iov->addr = ib_dma_map_single(ia->ri_id->device, | |
1373 | va, len, DMA_BIDIRECTIONAL); | |
1374 | iov->length = len; | |
1375 | ||
bd7ed1d1 TT |
1376 | if (ia->ri_have_dma_lkey) { |
1377 | *mrp = NULL; | |
1378 | iov->lkey = ia->ri_dma_lkey; | |
1379 | return 0; | |
1380 | } else if (ia->ri_bind_mem != NULL) { | |
c56c65fb TT |
1381 | *mrp = NULL; |
1382 | iov->lkey = ia->ri_bind_mem->lkey; | |
1383 | return 0; | |
1384 | } | |
1385 | ||
1386 | ipb.addr = iov->addr; | |
1387 | ipb.size = iov->length; | |
1388 | mr = ib_reg_phys_mr(ia->ri_pd, &ipb, 1, | |
1389 | IB_ACCESS_LOCAL_WRITE, &iov->addr); | |
1390 | ||
1391 | dprintk("RPC: %s: phys convert: 0x%llx " | |
1392 | "registered 0x%llx length %d\n", | |
a56daeb7 AM |
1393 | __func__, (unsigned long long)ipb.addr, |
1394 | (unsigned long long)iov->addr, len); | |
c56c65fb TT |
1395 | |
1396 | if (IS_ERR(mr)) { | |
1397 | *mrp = NULL; | |
1398 | rc = PTR_ERR(mr); | |
1399 | dprintk("RPC: %s: failed with %i\n", __func__, rc); | |
1400 | } else { | |
1401 | *mrp = mr; | |
1402 | iov->lkey = mr->lkey; | |
1403 | rc = 0; | |
1404 | } | |
1405 | ||
1406 | return rc; | |
1407 | } | |
1408 | ||
1409 | int | |
1410 | rpcrdma_deregister_internal(struct rpcrdma_ia *ia, | |
1411 | struct ib_mr *mr, struct ib_sge *iov) | |
1412 | { | |
1413 | int rc; | |
1414 | ||
1415 | ib_dma_unmap_single(ia->ri_id->device, | |
1416 | iov->addr, iov->length, DMA_BIDIRECTIONAL); | |
1417 | ||
1418 | if (NULL == mr) | |
1419 | return 0; | |
1420 | ||
1421 | rc = ib_dereg_mr(mr); | |
1422 | if (rc) | |
1423 | dprintk("RPC: %s: ib_dereg_mr failed %i\n", __func__, rc); | |
1424 | return rc; | |
1425 | } | |
1426 | ||
1427 | /* | |
1428 | * Wrappers for chunk registration, shared by read/write chunk code. | |
1429 | */ | |
1430 | ||
1431 | static void | |
1432 | rpcrdma_map_one(struct rpcrdma_ia *ia, struct rpcrdma_mr_seg *seg, int writing) | |
1433 | { | |
1434 | seg->mr_dir = writing ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
1435 | seg->mr_dmalen = seg->mr_len; | |
1436 | if (seg->mr_page) | |
1437 | seg->mr_dma = ib_dma_map_page(ia->ri_id->device, | |
1438 | seg->mr_page, offset_in_page(seg->mr_offset), | |
1439 | seg->mr_dmalen, seg->mr_dir); | |
1440 | else | |
1441 | seg->mr_dma = ib_dma_map_single(ia->ri_id->device, | |
1442 | seg->mr_offset, | |
1443 | seg->mr_dmalen, seg->mr_dir); | |
1444 | } | |
1445 | ||
1446 | static void | |
1447 | rpcrdma_unmap_one(struct rpcrdma_ia *ia, struct rpcrdma_mr_seg *seg) | |
1448 | { | |
1449 | if (seg->mr_page) | |
1450 | ib_dma_unmap_page(ia->ri_id->device, | |
1451 | seg->mr_dma, seg->mr_dmalen, seg->mr_dir); | |
1452 | else | |
1453 | ib_dma_unmap_single(ia->ri_id->device, | |
1454 | seg->mr_dma, seg->mr_dmalen, seg->mr_dir); | |
1455 | } | |
1456 | ||
3197d309 TT |
1457 | static int |
1458 | rpcrdma_register_frmr_external(struct rpcrdma_mr_seg *seg, | |
1459 | int *nsegs, int writing, struct rpcrdma_ia *ia, | |
1460 | struct rpcrdma_xprt *r_xprt) | |
1461 | { | |
1462 | struct rpcrdma_mr_seg *seg1 = seg; | |
1463 | struct ib_send_wr frmr_wr, *bad_wr; | |
1464 | u8 key; | |
1465 | int len, pageoff; | |
1466 | int i, rc; | |
1467 | ||
1468 | pageoff = offset_in_page(seg1->mr_offset); | |
1469 | seg1->mr_offset -= pageoff; /* start of page */ | |
1470 | seg1->mr_len += pageoff; | |
1471 | len = -pageoff; | |
1472 | if (*nsegs > RPCRDMA_MAX_DATA_SEGS) | |
1473 | *nsegs = RPCRDMA_MAX_DATA_SEGS; | |
1474 | for (i = 0; i < *nsegs;) { | |
1475 | rpcrdma_map_one(ia, seg, writing); | |
1476 | seg1->mr_chunk.rl_mw->r.frmr.fr_pgl->page_list[i] = seg->mr_dma; | |
1477 | len += seg->mr_len; | |
1478 | ++seg; | |
1479 | ++i; | |
1480 | /* Check for holes */ | |
1481 | if ((i < *nsegs && offset_in_page(seg->mr_offset)) || | |
1482 | offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len)) | |
1483 | break; | |
1484 | } | |
1485 | dprintk("RPC: %s: Using frmr %p to map %d segments\n", | |
1486 | __func__, seg1->mr_chunk.rl_mw, i); | |
1487 | ||
1488 | /* Bump the key */ | |
1489 | key = (u8)(seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey & 0x000000FF); | |
1490 | ib_update_fast_reg_key(seg1->mr_chunk.rl_mw->r.frmr.fr_mr, ++key); | |
1491 | ||
1492 | /* Prepare FRMR WR */ | |
1493 | memset(&frmr_wr, 0, sizeof frmr_wr); | |
1494 | frmr_wr.opcode = IB_WR_FAST_REG_MR; | |
1495 | frmr_wr.send_flags = 0; /* unsignaled */ | |
1496 | frmr_wr.wr.fast_reg.iova_start = (unsigned long)seg1->mr_dma; | |
1497 | frmr_wr.wr.fast_reg.page_list = seg1->mr_chunk.rl_mw->r.frmr.fr_pgl; | |
1498 | frmr_wr.wr.fast_reg.page_list_len = i; | |
1499 | frmr_wr.wr.fast_reg.page_shift = PAGE_SHIFT; | |
1500 | frmr_wr.wr.fast_reg.length = i << PAGE_SHIFT; | |
1501 | frmr_wr.wr.fast_reg.access_flags = (writing ? | |
1502 | IB_ACCESS_REMOTE_WRITE : IB_ACCESS_REMOTE_READ); | |
1503 | frmr_wr.wr.fast_reg.rkey = seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey; | |
1504 | DECR_CQCOUNT(&r_xprt->rx_ep); | |
1505 | ||
1506 | rc = ib_post_send(ia->ri_id->qp, &frmr_wr, &bad_wr); | |
1507 | ||
1508 | if (rc) { | |
1509 | dprintk("RPC: %s: failed ib_post_send for register," | |
1510 | " status %i\n", __func__, rc); | |
1511 | while (i--) | |
1512 | rpcrdma_unmap_one(ia, --seg); | |
1513 | } else { | |
1514 | seg1->mr_rkey = seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey; | |
1515 | seg1->mr_base = seg1->mr_dma + pageoff; | |
1516 | seg1->mr_nsegs = i; | |
1517 | seg1->mr_len = len; | |
1518 | } | |
1519 | *nsegs = i; | |
1520 | return rc; | |
1521 | } | |
1522 | ||
1523 | static int | |
1524 | rpcrdma_deregister_frmr_external(struct rpcrdma_mr_seg *seg, | |
1525 | struct rpcrdma_ia *ia, struct rpcrdma_xprt *r_xprt) | |
1526 | { | |
1527 | struct rpcrdma_mr_seg *seg1 = seg; | |
1528 | struct ib_send_wr invalidate_wr, *bad_wr; | |
1529 | int rc; | |
1530 | ||
1531 | while (seg1->mr_nsegs--) | |
1532 | rpcrdma_unmap_one(ia, seg++); | |
1533 | ||
1534 | memset(&invalidate_wr, 0, sizeof invalidate_wr); | |
1535 | invalidate_wr.opcode = IB_WR_LOCAL_INV; | |
1536 | invalidate_wr.send_flags = 0; /* unsignaled */ | |
1537 | invalidate_wr.ex.invalidate_rkey = seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey; | |
1538 | DECR_CQCOUNT(&r_xprt->rx_ep); | |
1539 | ||
1540 | rc = ib_post_send(ia->ri_id->qp, &invalidate_wr, &bad_wr); | |
1541 | if (rc) | |
1542 | dprintk("RPC: %s: failed ib_post_send for invalidate," | |
1543 | " status %i\n", __func__, rc); | |
1544 | return rc; | |
1545 | } | |
1546 | ||
8d4ba034 TT |
1547 | static int |
1548 | rpcrdma_register_fmr_external(struct rpcrdma_mr_seg *seg, | |
1549 | int *nsegs, int writing, struct rpcrdma_ia *ia) | |
1550 | { | |
1551 | struct rpcrdma_mr_seg *seg1 = seg; | |
1552 | u64 physaddrs[RPCRDMA_MAX_DATA_SEGS]; | |
1553 | int len, pageoff, i, rc; | |
1554 | ||
1555 | pageoff = offset_in_page(seg1->mr_offset); | |
1556 | seg1->mr_offset -= pageoff; /* start of page */ | |
1557 | seg1->mr_len += pageoff; | |
1558 | len = -pageoff; | |
1559 | if (*nsegs > RPCRDMA_MAX_DATA_SEGS) | |
1560 | *nsegs = RPCRDMA_MAX_DATA_SEGS; | |
1561 | for (i = 0; i < *nsegs;) { | |
1562 | rpcrdma_map_one(ia, seg, writing); | |
1563 | physaddrs[i] = seg->mr_dma; | |
1564 | len += seg->mr_len; | |
1565 | ++seg; | |
1566 | ++i; | |
1567 | /* Check for holes */ | |
1568 | if ((i < *nsegs && offset_in_page(seg->mr_offset)) || | |
1569 | offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len)) | |
1570 | break; | |
1571 | } | |
1572 | rc = ib_map_phys_fmr(seg1->mr_chunk.rl_mw->r.fmr, | |
1573 | physaddrs, i, seg1->mr_dma); | |
1574 | if (rc) { | |
1575 | dprintk("RPC: %s: failed ib_map_phys_fmr " | |
1576 | "%u@0x%llx+%i (%d)... status %i\n", __func__, | |
1577 | len, (unsigned long long)seg1->mr_dma, | |
1578 | pageoff, i, rc); | |
1579 | while (i--) | |
1580 | rpcrdma_unmap_one(ia, --seg); | |
1581 | } else { | |
1582 | seg1->mr_rkey = seg1->mr_chunk.rl_mw->r.fmr->rkey; | |
1583 | seg1->mr_base = seg1->mr_dma + pageoff; | |
1584 | seg1->mr_nsegs = i; | |
1585 | seg1->mr_len = len; | |
1586 | } | |
1587 | *nsegs = i; | |
1588 | return rc; | |
1589 | } | |
1590 | ||
1591 | static int | |
1592 | rpcrdma_deregister_fmr_external(struct rpcrdma_mr_seg *seg, | |
1593 | struct rpcrdma_ia *ia) | |
1594 | { | |
1595 | struct rpcrdma_mr_seg *seg1 = seg; | |
1596 | LIST_HEAD(l); | |
1597 | int rc; | |
1598 | ||
1599 | list_add(&seg1->mr_chunk.rl_mw->r.fmr->list, &l); | |
1600 | rc = ib_unmap_fmr(&l); | |
1601 | while (seg1->mr_nsegs--) | |
1602 | rpcrdma_unmap_one(ia, seg++); | |
1603 | if (rc) | |
1604 | dprintk("RPC: %s: failed ib_unmap_fmr," | |
1605 | " status %i\n", __func__, rc); | |
1606 | return rc; | |
1607 | } | |
1608 | ||
1609 | static int | |
1610 | rpcrdma_register_memwin_external(struct rpcrdma_mr_seg *seg, | |
1611 | int *nsegs, int writing, struct rpcrdma_ia *ia, | |
1612 | struct rpcrdma_xprt *r_xprt) | |
1613 | { | |
1614 | int mem_priv = (writing ? IB_ACCESS_REMOTE_WRITE : | |
1615 | IB_ACCESS_REMOTE_READ); | |
1616 | struct ib_mw_bind param; | |
1617 | int rc; | |
1618 | ||
1619 | *nsegs = 1; | |
1620 | rpcrdma_map_one(ia, seg, writing); | |
1621 | param.mr = ia->ri_bind_mem; | |
1622 | param.wr_id = 0ULL; /* no send cookie */ | |
1623 | param.addr = seg->mr_dma; | |
1624 | param.length = seg->mr_len; | |
1625 | param.send_flags = 0; | |
1626 | param.mw_access_flags = mem_priv; | |
1627 | ||
1628 | DECR_CQCOUNT(&r_xprt->rx_ep); | |
1629 | rc = ib_bind_mw(ia->ri_id->qp, seg->mr_chunk.rl_mw->r.mw, ¶m); | |
1630 | if (rc) { | |
1631 | dprintk("RPC: %s: failed ib_bind_mw " | |
1632 | "%u@0x%llx status %i\n", | |
1633 | __func__, seg->mr_len, | |
1634 | (unsigned long long)seg->mr_dma, rc); | |
1635 | rpcrdma_unmap_one(ia, seg); | |
1636 | } else { | |
1637 | seg->mr_rkey = seg->mr_chunk.rl_mw->r.mw->rkey; | |
1638 | seg->mr_base = param.addr; | |
1639 | seg->mr_nsegs = 1; | |
1640 | } | |
1641 | return rc; | |
1642 | } | |
1643 | ||
1644 | static int | |
1645 | rpcrdma_deregister_memwin_external(struct rpcrdma_mr_seg *seg, | |
1646 | struct rpcrdma_ia *ia, | |
1647 | struct rpcrdma_xprt *r_xprt, void **r) | |
1648 | { | |
1649 | struct ib_mw_bind param; | |
1650 | LIST_HEAD(l); | |
1651 | int rc; | |
1652 | ||
1653 | BUG_ON(seg->mr_nsegs != 1); | |
1654 | param.mr = ia->ri_bind_mem; | |
1655 | param.addr = 0ULL; /* unbind */ | |
1656 | param.length = 0; | |
1657 | param.mw_access_flags = 0; | |
1658 | if (*r) { | |
1659 | param.wr_id = (u64) (unsigned long) *r; | |
1660 | param.send_flags = IB_SEND_SIGNALED; | |
1661 | INIT_CQCOUNT(&r_xprt->rx_ep); | |
1662 | } else { | |
1663 | param.wr_id = 0ULL; | |
1664 | param.send_flags = 0; | |
1665 | DECR_CQCOUNT(&r_xprt->rx_ep); | |
1666 | } | |
1667 | rc = ib_bind_mw(ia->ri_id->qp, seg->mr_chunk.rl_mw->r.mw, ¶m); | |
1668 | rpcrdma_unmap_one(ia, seg); | |
1669 | if (rc) | |
1670 | dprintk("RPC: %s: failed ib_(un)bind_mw," | |
1671 | " status %i\n", __func__, rc); | |
1672 | else | |
1673 | *r = NULL; /* will upcall on completion */ | |
1674 | return rc; | |
1675 | } | |
1676 | ||
1677 | static int | |
1678 | rpcrdma_register_default_external(struct rpcrdma_mr_seg *seg, | |
1679 | int *nsegs, int writing, struct rpcrdma_ia *ia) | |
1680 | { | |
1681 | int mem_priv = (writing ? IB_ACCESS_REMOTE_WRITE : | |
1682 | IB_ACCESS_REMOTE_READ); | |
1683 | struct rpcrdma_mr_seg *seg1 = seg; | |
1684 | struct ib_phys_buf ipb[RPCRDMA_MAX_DATA_SEGS]; | |
1685 | int len, i, rc = 0; | |
1686 | ||
1687 | if (*nsegs > RPCRDMA_MAX_DATA_SEGS) | |
1688 | *nsegs = RPCRDMA_MAX_DATA_SEGS; | |
1689 | for (len = 0, i = 0; i < *nsegs;) { | |
1690 | rpcrdma_map_one(ia, seg, writing); | |
1691 | ipb[i].addr = seg->mr_dma; | |
1692 | ipb[i].size = seg->mr_len; | |
1693 | len += seg->mr_len; | |
1694 | ++seg; | |
1695 | ++i; | |
1696 | /* Check for holes */ | |
1697 | if ((i < *nsegs && offset_in_page(seg->mr_offset)) || | |
1698 | offset_in_page((seg-1)->mr_offset+(seg-1)->mr_len)) | |
1699 | break; | |
1700 | } | |
1701 | seg1->mr_base = seg1->mr_dma; | |
1702 | seg1->mr_chunk.rl_mr = ib_reg_phys_mr(ia->ri_pd, | |
1703 | ipb, i, mem_priv, &seg1->mr_base); | |
1704 | if (IS_ERR(seg1->mr_chunk.rl_mr)) { | |
1705 | rc = PTR_ERR(seg1->mr_chunk.rl_mr); | |
1706 | dprintk("RPC: %s: failed ib_reg_phys_mr " | |
1707 | "%u@0x%llx (%d)... status %i\n", | |
1708 | __func__, len, | |
1709 | (unsigned long long)seg1->mr_dma, i, rc); | |
1710 | while (i--) | |
1711 | rpcrdma_unmap_one(ia, --seg); | |
1712 | } else { | |
1713 | seg1->mr_rkey = seg1->mr_chunk.rl_mr->rkey; | |
1714 | seg1->mr_nsegs = i; | |
1715 | seg1->mr_len = len; | |
1716 | } | |
1717 | *nsegs = i; | |
1718 | return rc; | |
1719 | } | |
1720 | ||
1721 | static int | |
1722 | rpcrdma_deregister_default_external(struct rpcrdma_mr_seg *seg, | |
1723 | struct rpcrdma_ia *ia) | |
1724 | { | |
1725 | struct rpcrdma_mr_seg *seg1 = seg; | |
1726 | int rc; | |
1727 | ||
1728 | rc = ib_dereg_mr(seg1->mr_chunk.rl_mr); | |
1729 | seg1->mr_chunk.rl_mr = NULL; | |
1730 | while (seg1->mr_nsegs--) | |
1731 | rpcrdma_unmap_one(ia, seg++); | |
1732 | if (rc) | |
1733 | dprintk("RPC: %s: failed ib_dereg_mr," | |
1734 | " status %i\n", __func__, rc); | |
1735 | return rc; | |
1736 | } | |
1737 | ||
c56c65fb TT |
1738 | int |
1739 | rpcrdma_register_external(struct rpcrdma_mr_seg *seg, | |
1740 | int nsegs, int writing, struct rpcrdma_xprt *r_xprt) | |
1741 | { | |
1742 | struct rpcrdma_ia *ia = &r_xprt->rx_ia; | |
c56c65fb TT |
1743 | int rc = 0; |
1744 | ||
1745 | switch (ia->ri_memreg_strategy) { | |
1746 | ||
1747 | #if RPCRDMA_PERSISTENT_REGISTRATION | |
1748 | case RPCRDMA_ALLPHYSICAL: | |
1749 | rpcrdma_map_one(ia, seg, writing); | |
1750 | seg->mr_rkey = ia->ri_bind_mem->rkey; | |
1751 | seg->mr_base = seg->mr_dma; | |
1752 | seg->mr_nsegs = 1; | |
1753 | nsegs = 1; | |
1754 | break; | |
1755 | #endif | |
1756 | ||
3197d309 TT |
1757 | /* Registration using frmr registration */ |
1758 | case RPCRDMA_FRMR: | |
1759 | rc = rpcrdma_register_frmr_external(seg, &nsegs, writing, ia, r_xprt); | |
1760 | break; | |
1761 | ||
8d4ba034 | 1762 | /* Registration using fmr memory registration */ |
c56c65fb | 1763 | case RPCRDMA_MTHCAFMR: |
8d4ba034 | 1764 | rc = rpcrdma_register_fmr_external(seg, &nsegs, writing, ia); |
c56c65fb TT |
1765 | break; |
1766 | ||
1767 | /* Registration using memory windows */ | |
1768 | case RPCRDMA_MEMWINDOWS_ASYNC: | |
1769 | case RPCRDMA_MEMWINDOWS: | |
8d4ba034 | 1770 | rc = rpcrdma_register_memwin_external(seg, &nsegs, writing, ia, r_xprt); |
c56c65fb TT |
1771 | break; |
1772 | ||
1773 | /* Default registration each time */ | |
1774 | default: | |
8d4ba034 | 1775 | rc = rpcrdma_register_default_external(seg, &nsegs, writing, ia); |
c56c65fb TT |
1776 | break; |
1777 | } | |
1778 | if (rc) | |
1779 | return -1; | |
1780 | ||
1781 | return nsegs; | |
1782 | } | |
1783 | ||
1784 | int | |
1785 | rpcrdma_deregister_external(struct rpcrdma_mr_seg *seg, | |
1786 | struct rpcrdma_xprt *r_xprt, void *r) | |
1787 | { | |
1788 | struct rpcrdma_ia *ia = &r_xprt->rx_ia; | |
c56c65fb TT |
1789 | int nsegs = seg->mr_nsegs, rc; |
1790 | ||
1791 | switch (ia->ri_memreg_strategy) { | |
1792 | ||
1793 | #if RPCRDMA_PERSISTENT_REGISTRATION | |
1794 | case RPCRDMA_ALLPHYSICAL: | |
1795 | BUG_ON(nsegs != 1); | |
1796 | rpcrdma_unmap_one(ia, seg); | |
1797 | rc = 0; | |
1798 | break; | |
1799 | #endif | |
1800 | ||
3197d309 TT |
1801 | case RPCRDMA_FRMR: |
1802 | rc = rpcrdma_deregister_frmr_external(seg, ia, r_xprt); | |
1803 | break; | |
1804 | ||
c56c65fb | 1805 | case RPCRDMA_MTHCAFMR: |
8d4ba034 | 1806 | rc = rpcrdma_deregister_fmr_external(seg, ia); |
c56c65fb TT |
1807 | break; |
1808 | ||
1809 | case RPCRDMA_MEMWINDOWS_ASYNC: | |
1810 | case RPCRDMA_MEMWINDOWS: | |
8d4ba034 | 1811 | rc = rpcrdma_deregister_memwin_external(seg, ia, r_xprt, &r); |
c56c65fb TT |
1812 | break; |
1813 | ||
1814 | default: | |
8d4ba034 | 1815 | rc = rpcrdma_deregister_default_external(seg, ia); |
c56c65fb TT |
1816 | break; |
1817 | } | |
1818 | if (r) { | |
1819 | struct rpcrdma_rep *rep = r; | |
1820 | void (*func)(struct rpcrdma_rep *) = rep->rr_func; | |
1821 | rep->rr_func = NULL; | |
1822 | func(rep); /* dereg done, callback now */ | |
1823 | } | |
1824 | return nsegs; | |
1825 | } | |
1826 | ||
1827 | /* | |
1828 | * Prepost any receive buffer, then post send. | |
1829 | * | |
1830 | * Receive buffer is donated to hardware, reclaimed upon recv completion. | |
1831 | */ | |
1832 | int | |
1833 | rpcrdma_ep_post(struct rpcrdma_ia *ia, | |
1834 | struct rpcrdma_ep *ep, | |
1835 | struct rpcrdma_req *req) | |
1836 | { | |
1837 | struct ib_send_wr send_wr, *send_wr_fail; | |
1838 | struct rpcrdma_rep *rep = req->rl_reply; | |
1839 | int rc; | |
1840 | ||
1841 | if (rep) { | |
1842 | rc = rpcrdma_ep_post_recv(ia, ep, rep); | |
1843 | if (rc) | |
1844 | goto out; | |
1845 | req->rl_reply = NULL; | |
1846 | } | |
1847 | ||
1848 | send_wr.next = NULL; | |
1849 | send_wr.wr_id = 0ULL; /* no send cookie */ | |
1850 | send_wr.sg_list = req->rl_send_iov; | |
1851 | send_wr.num_sge = req->rl_niovs; | |
1852 | send_wr.opcode = IB_WR_SEND; | |
c56c65fb TT |
1853 | if (send_wr.num_sge == 4) /* no need to sync any pad (constant) */ |
1854 | ib_dma_sync_single_for_device(ia->ri_id->device, | |
1855 | req->rl_send_iov[3].addr, req->rl_send_iov[3].length, | |
1856 | DMA_TO_DEVICE); | |
1857 | ib_dma_sync_single_for_device(ia->ri_id->device, | |
1858 | req->rl_send_iov[1].addr, req->rl_send_iov[1].length, | |
1859 | DMA_TO_DEVICE); | |
1860 | ib_dma_sync_single_for_device(ia->ri_id->device, | |
1861 | req->rl_send_iov[0].addr, req->rl_send_iov[0].length, | |
1862 | DMA_TO_DEVICE); | |
1863 | ||
1864 | if (DECR_CQCOUNT(ep) > 0) | |
1865 | send_wr.send_flags = 0; | |
1866 | else { /* Provider must take a send completion every now and then */ | |
1867 | INIT_CQCOUNT(ep); | |
1868 | send_wr.send_flags = IB_SEND_SIGNALED; | |
1869 | } | |
1870 | ||
1871 | rc = ib_post_send(ia->ri_id->qp, &send_wr, &send_wr_fail); | |
1872 | if (rc) | |
1873 | dprintk("RPC: %s: ib_post_send returned %i\n", __func__, | |
1874 | rc); | |
1875 | out: | |
1876 | return rc; | |
1877 | } | |
1878 | ||
1879 | /* | |
1880 | * (Re)post a receive buffer. | |
1881 | */ | |
1882 | int | |
1883 | rpcrdma_ep_post_recv(struct rpcrdma_ia *ia, | |
1884 | struct rpcrdma_ep *ep, | |
1885 | struct rpcrdma_rep *rep) | |
1886 | { | |
1887 | struct ib_recv_wr recv_wr, *recv_wr_fail; | |
1888 | int rc; | |
1889 | ||
1890 | recv_wr.next = NULL; | |
1891 | recv_wr.wr_id = (u64) (unsigned long) rep; | |
1892 | recv_wr.sg_list = &rep->rr_iov; | |
1893 | recv_wr.num_sge = 1; | |
1894 | ||
1895 | ib_dma_sync_single_for_cpu(ia->ri_id->device, | |
1896 | rep->rr_iov.addr, rep->rr_iov.length, DMA_BIDIRECTIONAL); | |
1897 | ||
1898 | DECR_CQCOUNT(ep); | |
1899 | rc = ib_post_recv(ia->ri_id->qp, &recv_wr, &recv_wr_fail); | |
1900 | ||
1901 | if (rc) | |
1902 | dprintk("RPC: %s: ib_post_recv returned %i\n", __func__, | |
1903 | rc); | |
1904 | return rc; | |
1905 | } |