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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> |
c56c65fb | 51 | #include <linux/pci.h> /* for Tavor hack below */ |
5a0e3ad6 | 52 | #include <linux/slab.h> |
c56c65fb | 53 | |
f58851e6 TT |
54 | #include "xprt_rdma.h" |
55 | ||
c56c65fb TT |
56 | /* |
57 | * Globals/Macros | |
58 | */ | |
59 | ||
60 | #ifdef RPC_DEBUG | |
61 | # define RPCDBG_FACILITY RPCDBG_TRANS | |
62 | #endif | |
63 | ||
64 | /* | |
65 | * internal functions | |
66 | */ | |
67 | ||
68 | /* | |
69 | * handle replies in tasklet context, using a single, global list | |
70 | * rdma tasklet function -- just turn around and call the func | |
71 | * for all replies on the list | |
72 | */ | |
73 | ||
74 | static DEFINE_SPINLOCK(rpcrdma_tk_lock_g); | |
75 | static LIST_HEAD(rpcrdma_tasklets_g); | |
76 | ||
77 | static void | |
78 | rpcrdma_run_tasklet(unsigned long data) | |
79 | { | |
80 | struct rpcrdma_rep *rep; | |
81 | void (*func)(struct rpcrdma_rep *); | |
82 | unsigned long flags; | |
83 | ||
84 | data = data; | |
85 | spin_lock_irqsave(&rpcrdma_tk_lock_g, flags); | |
86 | while (!list_empty(&rpcrdma_tasklets_g)) { | |
87 | rep = list_entry(rpcrdma_tasklets_g.next, | |
88 | struct rpcrdma_rep, rr_list); | |
89 | list_del(&rep->rr_list); | |
90 | func = rep->rr_func; | |
91 | rep->rr_func = NULL; | |
92 | spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags); | |
93 | ||
94 | if (func) | |
95 | func(rep); | |
96 | else | |
97 | rpcrdma_recv_buffer_put(rep); | |
98 | ||
99 | spin_lock_irqsave(&rpcrdma_tk_lock_g, flags); | |
100 | } | |
101 | spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags); | |
102 | } | |
103 | ||
104 | static DECLARE_TASKLET(rpcrdma_tasklet_g, rpcrdma_run_tasklet, 0UL); | |
105 | ||
106 | static inline void | |
107 | rpcrdma_schedule_tasklet(struct rpcrdma_rep *rep) | |
108 | { | |
109 | unsigned long flags; | |
110 | ||
111 | spin_lock_irqsave(&rpcrdma_tk_lock_g, flags); | |
112 | list_add_tail(&rep->rr_list, &rpcrdma_tasklets_g); | |
113 | spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags); | |
114 | tasklet_schedule(&rpcrdma_tasklet_g); | |
115 | } | |
116 | ||
117 | static void | |
118 | rpcrdma_qp_async_error_upcall(struct ib_event *event, void *context) | |
119 | { | |
120 | struct rpcrdma_ep *ep = context; | |
121 | ||
122 | dprintk("RPC: %s: QP error %X on device %s ep %p\n", | |
123 | __func__, event->event, event->device->name, context); | |
124 | if (ep->rep_connected == 1) { | |
125 | ep->rep_connected = -EIO; | |
126 | ep->rep_func(ep); | |
127 | wake_up_all(&ep->rep_connect_wait); | |
128 | } | |
129 | } | |
130 | ||
131 | static void | |
132 | rpcrdma_cq_async_error_upcall(struct ib_event *event, void *context) | |
133 | { | |
134 | struct rpcrdma_ep *ep = context; | |
135 | ||
136 | dprintk("RPC: %s: CQ error %X on device %s ep %p\n", | |
137 | __func__, event->event, event->device->name, context); | |
138 | if (ep->rep_connected == 1) { | |
139 | ep->rep_connected = -EIO; | |
140 | ep->rep_func(ep); | |
141 | wake_up_all(&ep->rep_connect_wait); | |
142 | } | |
143 | } | |
144 | ||
fc664485 CL |
145 | static void |
146 | rpcrdma_sendcq_process_wc(struct ib_wc *wc) | |
c56c65fb | 147 | { |
fc664485 | 148 | struct rpcrdma_mw *frmr = (struct rpcrdma_mw *)(unsigned long)wc->wr_id; |
c56c65fb | 149 | |
fc664485 CL |
150 | dprintk("RPC: %s: frmr %p status %X opcode %d\n", |
151 | __func__, frmr, wc->status, wc->opcode); | |
c56c65fb | 152 | |
fc664485 | 153 | if (wc->wr_id == 0ULL) |
c56c65fb | 154 | return; |
fc664485 | 155 | if (wc->status != IB_WC_SUCCESS) |
c56c65fb | 156 | return; |
c56c65fb | 157 | |
fc664485 | 158 | if (wc->opcode == IB_WC_FAST_REG_MR) |
5c635e09 | 159 | frmr->r.frmr.state = FRMR_IS_VALID; |
fc664485 | 160 | else if (wc->opcode == IB_WC_LOCAL_INV) |
5c635e09 | 161 | frmr->r.frmr.state = FRMR_IS_INVALID; |
c56c65fb TT |
162 | } |
163 | ||
fc664485 CL |
164 | static int |
165 | rpcrdma_sendcq_poll(struct ib_cq *cq) | |
c56c65fb TT |
166 | { |
167 | struct ib_wc wc; | |
168 | int rc; | |
169 | ||
fc664485 CL |
170 | while ((rc = ib_poll_cq(cq, 1, &wc)) == 1) |
171 | rpcrdma_sendcq_process_wc(&wc); | |
172 | return rc; | |
173 | } | |
c56c65fb | 174 | |
fc664485 CL |
175 | /* |
176 | * Handle send, fast_reg_mr, and local_inv completions. | |
177 | * | |
178 | * Send events are typically suppressed and thus do not result | |
179 | * in an upcall. Occasionally one is signaled, however. This | |
180 | * prevents the provider's completion queue from wrapping and | |
181 | * losing a completion. | |
182 | */ | |
183 | static void | |
184 | rpcrdma_sendcq_upcall(struct ib_cq *cq, void *cq_context) | |
185 | { | |
186 | int rc; | |
187 | ||
188 | rc = rpcrdma_sendcq_poll(cq); | |
189 | if (rc) { | |
190 | dprintk("RPC: %s: ib_poll_cq failed: %i\n", | |
191 | __func__, rc); | |
192 | return; | |
c56c65fb TT |
193 | } |
194 | ||
7f23f6f6 CL |
195 | rc = ib_req_notify_cq(cq, |
196 | IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS); | |
197 | if (rc == 0) | |
198 | return; | |
199 | if (rc < 0) { | |
fc664485 CL |
200 | dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", |
201 | __func__, rc); | |
202 | return; | |
203 | } | |
204 | ||
205 | rpcrdma_sendcq_poll(cq); | |
206 | } | |
207 | ||
208 | static void | |
209 | rpcrdma_recvcq_process_wc(struct ib_wc *wc) | |
210 | { | |
211 | struct rpcrdma_rep *rep = | |
212 | (struct rpcrdma_rep *)(unsigned long)wc->wr_id; | |
213 | ||
214 | dprintk("RPC: %s: rep %p status %X opcode %X length %u\n", | |
215 | __func__, rep, wc->status, wc->opcode, wc->byte_len); | |
216 | ||
217 | if (wc->status != IB_WC_SUCCESS) { | |
218 | rep->rr_len = ~0U; | |
219 | goto out_schedule; | |
220 | } | |
221 | if (wc->opcode != IB_WC_RECV) | |
222 | return; | |
223 | ||
224 | rep->rr_len = wc->byte_len; | |
225 | ib_dma_sync_single_for_cpu(rdmab_to_ia(rep->rr_buffer)->ri_id->device, | |
226 | rep->rr_iov.addr, rep->rr_len, DMA_FROM_DEVICE); | |
227 | ||
228 | if (rep->rr_len >= 16) { | |
229 | struct rpcrdma_msg *p = (struct rpcrdma_msg *)rep->rr_base; | |
230 | unsigned int credits = ntohl(p->rm_credit); | |
231 | ||
232 | if (credits == 0) | |
233 | credits = 1; /* don't deadlock */ | |
234 | else if (credits > rep->rr_buffer->rb_max_requests) | |
235 | credits = rep->rr_buffer->rb_max_requests; | |
236 | atomic_set(&rep->rr_buffer->rb_credits, credits); | |
237 | } | |
238 | ||
239 | out_schedule: | |
240 | rpcrdma_schedule_tasklet(rep); | |
241 | } | |
242 | ||
243 | static int | |
244 | rpcrdma_recvcq_poll(struct ib_cq *cq) | |
245 | { | |
246 | struct ib_wc wc; | |
247 | int rc; | |
248 | ||
249 | while ((rc = ib_poll_cq(cq, 1, &wc)) == 1) | |
250 | rpcrdma_recvcq_process_wc(&wc); | |
251 | return rc; | |
c56c65fb TT |
252 | } |
253 | ||
254 | /* | |
fc664485 | 255 | * Handle receive completions. |
c56c65fb | 256 | * |
c56c65fb TT |
257 | * It is reentrant but processes single events in order to maintain |
258 | * ordering of receives to keep server credits. | |
259 | * | |
260 | * It is the responsibility of the scheduled tasklet to return | |
261 | * recv buffers to the pool. NOTE: this affects synchronization of | |
262 | * connection shutdown. That is, the structures required for | |
263 | * the completion of the reply handler must remain intact until | |
264 | * all memory has been reclaimed. | |
c56c65fb TT |
265 | */ |
266 | static void | |
fc664485 | 267 | rpcrdma_recvcq_upcall(struct ib_cq *cq, void *cq_context) |
c56c65fb TT |
268 | { |
269 | int rc; | |
270 | ||
fc664485 CL |
271 | rc = rpcrdma_recvcq_poll(cq); |
272 | if (rc) { | |
273 | dprintk("RPC: %s: ib_poll_cq failed: %i\n", | |
274 | __func__, rc); | |
c56c65fb | 275 | return; |
fc664485 | 276 | } |
c56c65fb | 277 | |
7f23f6f6 CL |
278 | rc = ib_req_notify_cq(cq, |
279 | IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS); | |
280 | if (rc == 0) | |
281 | return; | |
282 | if (rc < 0) { | |
fc664485 | 283 | dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", |
c56c65fb TT |
284 | __func__, rc); |
285 | return; | |
286 | } | |
287 | ||
fc664485 | 288 | rpcrdma_recvcq_poll(cq); |
c56c65fb TT |
289 | } |
290 | ||
291 | #ifdef RPC_DEBUG | |
292 | static const char * const conn[] = { | |
293 | "address resolved", | |
294 | "address error", | |
295 | "route resolved", | |
296 | "route error", | |
297 | "connect request", | |
298 | "connect response", | |
299 | "connect error", | |
300 | "unreachable", | |
301 | "rejected", | |
302 | "established", | |
303 | "disconnected", | |
304 | "device removal" | |
305 | }; | |
306 | #endif | |
307 | ||
308 | static int | |
309 | rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event) | |
310 | { | |
311 | struct rpcrdma_xprt *xprt = id->context; | |
312 | struct rpcrdma_ia *ia = &xprt->rx_ia; | |
313 | struct rpcrdma_ep *ep = &xprt->rx_ep; | |
ff0db049 | 314 | #ifdef RPC_DEBUG |
c56c65fb | 315 | struct sockaddr_in *addr = (struct sockaddr_in *) &ep->rep_remote_addr; |
ff0db049 | 316 | #endif |
c56c65fb TT |
317 | struct ib_qp_attr attr; |
318 | struct ib_qp_init_attr iattr; | |
319 | int connstate = 0; | |
320 | ||
321 | switch (event->event) { | |
322 | case RDMA_CM_EVENT_ADDR_RESOLVED: | |
323 | case RDMA_CM_EVENT_ROUTE_RESOLVED: | |
5675add3 | 324 | ia->ri_async_rc = 0; |
c56c65fb TT |
325 | complete(&ia->ri_done); |
326 | break; | |
327 | case RDMA_CM_EVENT_ADDR_ERROR: | |
328 | ia->ri_async_rc = -EHOSTUNREACH; | |
329 | dprintk("RPC: %s: CM address resolution error, ep 0x%p\n", | |
330 | __func__, ep); | |
331 | complete(&ia->ri_done); | |
332 | break; | |
333 | case RDMA_CM_EVENT_ROUTE_ERROR: | |
334 | ia->ri_async_rc = -ENETUNREACH; | |
335 | dprintk("RPC: %s: CM route resolution error, ep 0x%p\n", | |
336 | __func__, ep); | |
337 | complete(&ia->ri_done); | |
338 | break; | |
339 | case RDMA_CM_EVENT_ESTABLISHED: | |
340 | connstate = 1; | |
341 | ib_query_qp(ia->ri_id->qp, &attr, | |
342 | IB_QP_MAX_QP_RD_ATOMIC | IB_QP_MAX_DEST_RD_ATOMIC, | |
343 | &iattr); | |
344 | dprintk("RPC: %s: %d responder resources" | |
345 | " (%d initiator)\n", | |
346 | __func__, attr.max_dest_rd_atomic, attr.max_rd_atomic); | |
347 | goto connected; | |
348 | case RDMA_CM_EVENT_CONNECT_ERROR: | |
349 | connstate = -ENOTCONN; | |
350 | goto connected; | |
351 | case RDMA_CM_EVENT_UNREACHABLE: | |
352 | connstate = -ENETDOWN; | |
353 | goto connected; | |
354 | case RDMA_CM_EVENT_REJECTED: | |
355 | connstate = -ECONNREFUSED; | |
356 | goto connected; | |
357 | case RDMA_CM_EVENT_DISCONNECTED: | |
358 | connstate = -ECONNABORTED; | |
359 | goto connected; | |
360 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
361 | connstate = -ENODEV; | |
362 | connected: | |
21454aaa | 363 | dprintk("RPC: %s: %s: %pI4:%u (ep 0x%p event 0x%x)\n", |
c56c65fb TT |
364 | __func__, |
365 | (event->event <= 11) ? conn[event->event] : | |
366 | "unknown connection error", | |
21454aaa | 367 | &addr->sin_addr.s_addr, |
c56c65fb TT |
368 | ntohs(addr->sin_port), |
369 | ep, event->event); | |
370 | atomic_set(&rpcx_to_rdmax(ep->rep_xprt)->rx_buf.rb_credits, 1); | |
371 | dprintk("RPC: %s: %sconnected\n", | |
372 | __func__, connstate > 0 ? "" : "dis"); | |
373 | ep->rep_connected = connstate; | |
374 | ep->rep_func(ep); | |
375 | wake_up_all(&ep->rep_connect_wait); | |
376 | break; | |
377 | default: | |
1a954051 | 378 | dprintk("RPC: %s: unexpected CM event %d\n", |
c56c65fb | 379 | __func__, event->event); |
c56c65fb TT |
380 | break; |
381 | } | |
382 | ||
b3cd8d45 TT |
383 | #ifdef RPC_DEBUG |
384 | if (connstate == 1) { | |
385 | int ird = attr.max_dest_rd_atomic; | |
386 | int tird = ep->rep_remote_cma.responder_resources; | |
21454aaa | 387 | printk(KERN_INFO "rpcrdma: connection to %pI4:%u " |
b3cd8d45 | 388 | "on %s, memreg %d slots %d ird %d%s\n", |
21454aaa | 389 | &addr->sin_addr.s_addr, |
b3cd8d45 TT |
390 | ntohs(addr->sin_port), |
391 | ia->ri_id->device->name, | |
392 | ia->ri_memreg_strategy, | |
393 | xprt->rx_buf.rb_max_requests, | |
394 | ird, ird < 4 && ird < tird / 2 ? " (low!)" : ""); | |
395 | } else if (connstate < 0) { | |
21454aaa HH |
396 | printk(KERN_INFO "rpcrdma: connection to %pI4:%u closed (%d)\n", |
397 | &addr->sin_addr.s_addr, | |
b3cd8d45 TT |
398 | ntohs(addr->sin_port), |
399 | connstate); | |
400 | } | |
401 | #endif | |
402 | ||
c56c65fb TT |
403 | return 0; |
404 | } | |
405 | ||
406 | static struct rdma_cm_id * | |
407 | rpcrdma_create_id(struct rpcrdma_xprt *xprt, | |
408 | struct rpcrdma_ia *ia, struct sockaddr *addr) | |
409 | { | |
410 | struct rdma_cm_id *id; | |
411 | int rc; | |
412 | ||
1a954051 TT |
413 | init_completion(&ia->ri_done); |
414 | ||
b26f9b99 | 415 | id = rdma_create_id(rpcrdma_conn_upcall, xprt, RDMA_PS_TCP, IB_QPT_RC); |
c56c65fb TT |
416 | if (IS_ERR(id)) { |
417 | rc = PTR_ERR(id); | |
418 | dprintk("RPC: %s: rdma_create_id() failed %i\n", | |
419 | __func__, rc); | |
420 | return id; | |
421 | } | |
422 | ||
5675add3 | 423 | ia->ri_async_rc = -ETIMEDOUT; |
c56c65fb TT |
424 | rc = rdma_resolve_addr(id, NULL, addr, RDMA_RESOLVE_TIMEOUT); |
425 | if (rc) { | |
426 | dprintk("RPC: %s: rdma_resolve_addr() failed %i\n", | |
427 | __func__, rc); | |
428 | goto out; | |
429 | } | |
5675add3 TT |
430 | wait_for_completion_interruptible_timeout(&ia->ri_done, |
431 | msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT) + 1); | |
c56c65fb TT |
432 | rc = ia->ri_async_rc; |
433 | if (rc) | |
434 | goto out; | |
435 | ||
5675add3 | 436 | ia->ri_async_rc = -ETIMEDOUT; |
c56c65fb TT |
437 | rc = rdma_resolve_route(id, RDMA_RESOLVE_TIMEOUT); |
438 | if (rc) { | |
439 | dprintk("RPC: %s: rdma_resolve_route() failed %i\n", | |
440 | __func__, rc); | |
441 | goto out; | |
442 | } | |
5675add3 TT |
443 | wait_for_completion_interruptible_timeout(&ia->ri_done, |
444 | msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT) + 1); | |
c56c65fb TT |
445 | rc = ia->ri_async_rc; |
446 | if (rc) | |
447 | goto out; | |
448 | ||
449 | return id; | |
450 | ||
451 | out: | |
452 | rdma_destroy_id(id); | |
453 | return ERR_PTR(rc); | |
454 | } | |
455 | ||
456 | /* | |
457 | * Drain any cq, prior to teardown. | |
458 | */ | |
459 | static void | |
460 | rpcrdma_clean_cq(struct ib_cq *cq) | |
461 | { | |
462 | struct ib_wc wc; | |
463 | int count = 0; | |
464 | ||
465 | while (1 == ib_poll_cq(cq, 1, &wc)) | |
466 | ++count; | |
467 | ||
468 | if (count) | |
469 | dprintk("RPC: %s: flushed %d events (last 0x%x)\n", | |
470 | __func__, count, wc.opcode); | |
471 | } | |
472 | ||
473 | /* | |
474 | * Exported functions. | |
475 | */ | |
476 | ||
477 | /* | |
478 | * Open and initialize an Interface Adapter. | |
479 | * o initializes fields of struct rpcrdma_ia, including | |
480 | * interface and provider attributes and protection zone. | |
481 | */ | |
482 | int | |
483 | rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) | |
484 | { | |
bd7ed1d1 TT |
485 | int rc, mem_priv; |
486 | struct ib_device_attr devattr; | |
c56c65fb TT |
487 | struct rpcrdma_ia *ia = &xprt->rx_ia; |
488 | ||
c56c65fb TT |
489 | ia->ri_id = rpcrdma_create_id(xprt, ia, addr); |
490 | if (IS_ERR(ia->ri_id)) { | |
491 | rc = PTR_ERR(ia->ri_id); | |
492 | goto out1; | |
493 | } | |
494 | ||
495 | ia->ri_pd = ib_alloc_pd(ia->ri_id->device); | |
496 | if (IS_ERR(ia->ri_pd)) { | |
497 | rc = PTR_ERR(ia->ri_pd); | |
498 | dprintk("RPC: %s: ib_alloc_pd() failed %i\n", | |
499 | __func__, rc); | |
500 | goto out2; | |
501 | } | |
502 | ||
bd7ed1d1 TT |
503 | /* |
504 | * Query the device to determine if the requested memory | |
505 | * registration strategy is supported. If it isn't, set the | |
506 | * strategy to a globally supported model. | |
507 | */ | |
508 | rc = ib_query_device(ia->ri_id->device, &devattr); | |
509 | if (rc) { | |
510 | dprintk("RPC: %s: ib_query_device failed %d\n", | |
511 | __func__, rc); | |
512 | goto out2; | |
513 | } | |
514 | ||
515 | if (devattr.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY) { | |
516 | ia->ri_have_dma_lkey = 1; | |
517 | ia->ri_dma_lkey = ia->ri_id->device->local_dma_lkey; | |
518 | } | |
519 | ||
f10eafd3 | 520 | if (memreg == RPCRDMA_FRMR) { |
3197d309 TT |
521 | /* Requires both frmr reg and local dma lkey */ |
522 | if ((devattr.device_cap_flags & | |
523 | (IB_DEVICE_MEM_MGT_EXTENSIONS|IB_DEVICE_LOCAL_DMA_LKEY)) != | |
524 | (IB_DEVICE_MEM_MGT_EXTENSIONS|IB_DEVICE_LOCAL_DMA_LKEY)) { | |
3197d309 | 525 | dprintk("RPC: %s: FRMR registration " |
f10eafd3 CL |
526 | "not supported by HCA\n", __func__); |
527 | memreg = RPCRDMA_MTHCAFMR; | |
0fc6c4e7 SW |
528 | } else { |
529 | /* Mind the ia limit on FRMR page list depth */ | |
530 | ia->ri_max_frmr_depth = min_t(unsigned int, | |
531 | RPCRDMA_MAX_DATA_SEGS, | |
532 | devattr.max_fast_reg_page_list_len); | |
bd7ed1d1 | 533 | } |
f10eafd3 CL |
534 | } |
535 | if (memreg == RPCRDMA_MTHCAFMR) { | |
536 | if (!ia->ri_id->device->alloc_fmr) { | |
537 | dprintk("RPC: %s: MTHCAFMR registration " | |
538 | "not supported by HCA\n", __func__); | |
539 | #if RPCRDMA_PERSISTENT_REGISTRATION | |
540 | memreg = RPCRDMA_ALLPHYSICAL; | |
541 | #else | |
cdd9ade7 | 542 | rc = -ENOMEM; |
f10eafd3 CL |
543 | goto out2; |
544 | #endif | |
545 | } | |
bd7ed1d1 TT |
546 | } |
547 | ||
c56c65fb TT |
548 | /* |
549 | * Optionally obtain an underlying physical identity mapping in | |
550 | * order to do a memory window-based bind. This base registration | |
551 | * is protected from remote access - that is enabled only by binding | |
552 | * for the specific bytes targeted during each RPC operation, and | |
553 | * revoked after the corresponding completion similar to a storage | |
554 | * adapter. | |
555 | */ | |
bd7ed1d1 | 556 | switch (memreg) { |
3197d309 | 557 | case RPCRDMA_FRMR: |
bd7ed1d1 | 558 | break; |
c56c65fb | 559 | #if RPCRDMA_PERSISTENT_REGISTRATION |
bd7ed1d1 TT |
560 | case RPCRDMA_ALLPHYSICAL: |
561 | mem_priv = IB_ACCESS_LOCAL_WRITE | | |
562 | IB_ACCESS_REMOTE_WRITE | | |
563 | IB_ACCESS_REMOTE_READ; | |
564 | goto register_setup; | |
c56c65fb | 565 | #endif |
bd7ed1d1 TT |
566 | case RPCRDMA_MTHCAFMR: |
567 | if (ia->ri_have_dma_lkey) | |
c56c65fb | 568 | break; |
bd7ed1d1 | 569 | mem_priv = IB_ACCESS_LOCAL_WRITE; |
b45ccfd2 | 570 | #if RPCRDMA_PERSISTENT_REGISTRATION |
bd7ed1d1 | 571 | register_setup: |
b45ccfd2 | 572 | #endif |
c56c65fb TT |
573 | ia->ri_bind_mem = ib_get_dma_mr(ia->ri_pd, mem_priv); |
574 | if (IS_ERR(ia->ri_bind_mem)) { | |
575 | printk(KERN_ALERT "%s: ib_get_dma_mr for " | |
0ac531c1 | 576 | "phys register failed with %lX\n", |
c56c65fb | 577 | __func__, PTR_ERR(ia->ri_bind_mem)); |
0ac531c1 CL |
578 | rc = -ENOMEM; |
579 | goto out2; | |
c56c65fb | 580 | } |
bd7ed1d1 TT |
581 | break; |
582 | default: | |
cdd9ade7 CL |
583 | printk(KERN_ERR "RPC: Unsupported memory " |
584 | "registration mode: %d\n", memreg); | |
585 | rc = -ENOMEM; | |
bd7ed1d1 | 586 | goto out2; |
c56c65fb | 587 | } |
bd7ed1d1 TT |
588 | dprintk("RPC: %s: memory registration strategy is %d\n", |
589 | __func__, memreg); | |
c56c65fb TT |
590 | |
591 | /* Else will do memory reg/dereg for each chunk */ | |
592 | ia->ri_memreg_strategy = memreg; | |
593 | ||
594 | return 0; | |
595 | out2: | |
596 | rdma_destroy_id(ia->ri_id); | |
fee08caf | 597 | ia->ri_id = NULL; |
c56c65fb TT |
598 | out1: |
599 | return rc; | |
600 | } | |
601 | ||
602 | /* | |
603 | * Clean up/close an IA. | |
604 | * o if event handles and PD have been initialized, free them. | |
605 | * o close the IA | |
606 | */ | |
607 | void | |
608 | rpcrdma_ia_close(struct rpcrdma_ia *ia) | |
609 | { | |
610 | int rc; | |
611 | ||
612 | dprintk("RPC: %s: entering\n", __func__); | |
613 | if (ia->ri_bind_mem != NULL) { | |
614 | rc = ib_dereg_mr(ia->ri_bind_mem); | |
615 | dprintk("RPC: %s: ib_dereg_mr returned %i\n", | |
616 | __func__, rc); | |
617 | } | |
fee08caf TT |
618 | if (ia->ri_id != NULL && !IS_ERR(ia->ri_id)) { |
619 | if (ia->ri_id->qp) | |
620 | rdma_destroy_qp(ia->ri_id); | |
621 | rdma_destroy_id(ia->ri_id); | |
622 | ia->ri_id = NULL; | |
623 | } | |
c56c65fb TT |
624 | if (ia->ri_pd != NULL && !IS_ERR(ia->ri_pd)) { |
625 | rc = ib_dealloc_pd(ia->ri_pd); | |
626 | dprintk("RPC: %s: ib_dealloc_pd returned %i\n", | |
627 | __func__, rc); | |
628 | } | |
c56c65fb TT |
629 | } |
630 | ||
631 | /* | |
632 | * Create unconnected endpoint. | |
633 | */ | |
634 | int | |
635 | rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, | |
636 | struct rpcrdma_create_data_internal *cdata) | |
637 | { | |
638 | struct ib_device_attr devattr; | |
fc664485 | 639 | struct ib_cq *sendcq, *recvcq; |
5d40a8a5 | 640 | int rc, err; |
c56c65fb TT |
641 | |
642 | rc = ib_query_device(ia->ri_id->device, &devattr); | |
643 | if (rc) { | |
644 | dprintk("RPC: %s: ib_query_device failed %d\n", | |
645 | __func__, rc); | |
646 | return rc; | |
647 | } | |
648 | ||
649 | /* check provider's send/recv wr limits */ | |
650 | if (cdata->max_requests > devattr.max_qp_wr) | |
651 | cdata->max_requests = devattr.max_qp_wr; | |
652 | ||
653 | ep->rep_attr.event_handler = rpcrdma_qp_async_error_upcall; | |
654 | ep->rep_attr.qp_context = ep; | |
655 | /* send_cq and recv_cq initialized below */ | |
656 | ep->rep_attr.srq = NULL; | |
657 | ep->rep_attr.cap.max_send_wr = cdata->max_requests; | |
658 | switch (ia->ri_memreg_strategy) { | |
0fc6c4e7 SW |
659 | case RPCRDMA_FRMR: { |
660 | int depth = 7; | |
661 | ||
15cdc644 TT |
662 | /* Add room for frmr register and invalidate WRs. |
663 | * 1. FRMR reg WR for head | |
664 | * 2. FRMR invalidate WR for head | |
0fc6c4e7 SW |
665 | * 3. N FRMR reg WRs for pagelist |
666 | * 4. N FRMR invalidate WRs for pagelist | |
15cdc644 TT |
667 | * 5. FRMR reg WR for tail |
668 | * 6. FRMR invalidate WR for tail | |
669 | * 7. The RDMA_SEND WR | |
670 | */ | |
0fc6c4e7 SW |
671 | |
672 | /* Calculate N if the device max FRMR depth is smaller than | |
673 | * RPCRDMA_MAX_DATA_SEGS. | |
674 | */ | |
675 | if (ia->ri_max_frmr_depth < RPCRDMA_MAX_DATA_SEGS) { | |
676 | int delta = RPCRDMA_MAX_DATA_SEGS - | |
677 | ia->ri_max_frmr_depth; | |
678 | ||
679 | do { | |
680 | depth += 2; /* FRMR reg + invalidate */ | |
681 | delta -= ia->ri_max_frmr_depth; | |
682 | } while (delta > 0); | |
683 | ||
684 | } | |
685 | ep->rep_attr.cap.max_send_wr *= depth; | |
15cdc644 | 686 | if (ep->rep_attr.cap.max_send_wr > devattr.max_qp_wr) { |
0fc6c4e7 | 687 | cdata->max_requests = devattr.max_qp_wr / depth; |
15cdc644 TT |
688 | if (!cdata->max_requests) |
689 | return -EINVAL; | |
0fc6c4e7 SW |
690 | ep->rep_attr.cap.max_send_wr = cdata->max_requests * |
691 | depth; | |
15cdc644 | 692 | } |
3197d309 | 693 | break; |
0fc6c4e7 | 694 | } |
c56c65fb TT |
695 | default: |
696 | break; | |
697 | } | |
698 | ep->rep_attr.cap.max_recv_wr = cdata->max_requests; | |
699 | ep->rep_attr.cap.max_send_sge = (cdata->padding ? 4 : 2); | |
700 | ep->rep_attr.cap.max_recv_sge = 1; | |
701 | ep->rep_attr.cap.max_inline_data = 0; | |
702 | ep->rep_attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
703 | ep->rep_attr.qp_type = IB_QPT_RC; | |
704 | ep->rep_attr.port_num = ~0; | |
705 | ||
706 | dprintk("RPC: %s: requested max: dtos: send %d recv %d; " | |
707 | "iovs: send %d recv %d\n", | |
708 | __func__, | |
709 | ep->rep_attr.cap.max_send_wr, | |
710 | ep->rep_attr.cap.max_recv_wr, | |
711 | ep->rep_attr.cap.max_send_sge, | |
712 | ep->rep_attr.cap.max_recv_sge); | |
713 | ||
714 | /* set trigger for requesting send completion */ | |
fc664485 | 715 | ep->rep_cqinit = ep->rep_attr.cap.max_send_wr/2 - 1; |
c56c65fb TT |
716 | if (ep->rep_cqinit <= 2) |
717 | ep->rep_cqinit = 0; | |
718 | INIT_CQCOUNT(ep); | |
719 | ep->rep_ia = ia; | |
720 | init_waitqueue_head(&ep->rep_connect_wait); | |
254f91e2 | 721 | INIT_DELAYED_WORK(&ep->rep_connect_worker, rpcrdma_connect_worker); |
c56c65fb | 722 | |
fc664485 | 723 | sendcq = ib_create_cq(ia->ri_id->device, rpcrdma_sendcq_upcall, |
c56c65fb | 724 | rpcrdma_cq_async_error_upcall, NULL, |
c56c65fb | 725 | ep->rep_attr.cap.max_send_wr + 1, 0); |
fc664485 CL |
726 | if (IS_ERR(sendcq)) { |
727 | rc = PTR_ERR(sendcq); | |
728 | dprintk("RPC: %s: failed to create send CQ: %i\n", | |
c56c65fb TT |
729 | __func__, rc); |
730 | goto out1; | |
731 | } | |
732 | ||
fc664485 | 733 | rc = ib_req_notify_cq(sendcq, IB_CQ_NEXT_COMP); |
c56c65fb TT |
734 | if (rc) { |
735 | dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", | |
736 | __func__, rc); | |
737 | goto out2; | |
738 | } | |
739 | ||
fc664485 CL |
740 | recvcq = ib_create_cq(ia->ri_id->device, rpcrdma_recvcq_upcall, |
741 | rpcrdma_cq_async_error_upcall, NULL, | |
742 | ep->rep_attr.cap.max_recv_wr + 1, 0); | |
743 | if (IS_ERR(recvcq)) { | |
744 | rc = PTR_ERR(recvcq); | |
745 | dprintk("RPC: %s: failed to create recv CQ: %i\n", | |
746 | __func__, rc); | |
747 | goto out2; | |
748 | } | |
749 | ||
750 | rc = ib_req_notify_cq(recvcq, IB_CQ_NEXT_COMP); | |
751 | if (rc) { | |
752 | dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", | |
753 | __func__, rc); | |
754 | ib_destroy_cq(recvcq); | |
755 | goto out2; | |
756 | } | |
757 | ||
758 | ep->rep_attr.send_cq = sendcq; | |
759 | ep->rep_attr.recv_cq = recvcq; | |
c56c65fb TT |
760 | |
761 | /* Initialize cma parameters */ | |
762 | ||
763 | /* RPC/RDMA does not use private data */ | |
764 | ep->rep_remote_cma.private_data = NULL; | |
765 | ep->rep_remote_cma.private_data_len = 0; | |
766 | ||
767 | /* Client offers RDMA Read but does not initiate */ | |
b334eaab | 768 | ep->rep_remote_cma.initiator_depth = 0; |
03ff8821 | 769 | if (devattr.max_qp_rd_atom > 32) /* arbitrary but <= 255 */ |
b334eaab TT |
770 | ep->rep_remote_cma.responder_resources = 32; |
771 | else | |
c56c65fb | 772 | ep->rep_remote_cma.responder_resources = devattr.max_qp_rd_atom; |
c56c65fb TT |
773 | |
774 | ep->rep_remote_cma.retry_count = 7; | |
775 | ep->rep_remote_cma.flow_control = 0; | |
776 | ep->rep_remote_cma.rnr_retry_count = 0; | |
777 | ||
778 | return 0; | |
779 | ||
780 | out2: | |
fc664485 | 781 | err = ib_destroy_cq(sendcq); |
5d40a8a5 CL |
782 | if (err) |
783 | dprintk("RPC: %s: ib_destroy_cq returned %i\n", | |
784 | __func__, err); | |
c56c65fb TT |
785 | out1: |
786 | return rc; | |
787 | } | |
788 | ||
789 | /* | |
790 | * rpcrdma_ep_destroy | |
791 | * | |
792 | * Disconnect and destroy endpoint. After this, the only | |
793 | * valid operations on the ep are to free it (if dynamically | |
794 | * allocated) or re-create it. | |
c56c65fb | 795 | */ |
7f1d5419 | 796 | void |
c56c65fb TT |
797 | rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) |
798 | { | |
799 | int rc; | |
800 | ||
801 | dprintk("RPC: %s: entering, connected is %d\n", | |
802 | __func__, ep->rep_connected); | |
803 | ||
254f91e2 CL |
804 | cancel_delayed_work_sync(&ep->rep_connect_worker); |
805 | ||
c56c65fb TT |
806 | if (ia->ri_id->qp) { |
807 | rc = rpcrdma_ep_disconnect(ep, ia); | |
808 | if (rc) | |
809 | dprintk("RPC: %s: rpcrdma_ep_disconnect" | |
810 | " returned %i\n", __func__, rc); | |
fee08caf TT |
811 | rdma_destroy_qp(ia->ri_id); |
812 | ia->ri_id->qp = NULL; | |
c56c65fb TT |
813 | } |
814 | ||
c56c65fb TT |
815 | /* padding - could be done in rpcrdma_buffer_destroy... */ |
816 | if (ep->rep_pad_mr) { | |
817 | rpcrdma_deregister_internal(ia, ep->rep_pad_mr, &ep->rep_pad); | |
818 | ep->rep_pad_mr = NULL; | |
819 | } | |
820 | ||
fc664485 CL |
821 | rpcrdma_clean_cq(ep->rep_attr.recv_cq); |
822 | rc = ib_destroy_cq(ep->rep_attr.recv_cq); | |
823 | if (rc) | |
824 | dprintk("RPC: %s: ib_destroy_cq returned %i\n", | |
825 | __func__, rc); | |
826 | ||
827 | rpcrdma_clean_cq(ep->rep_attr.send_cq); | |
828 | rc = ib_destroy_cq(ep->rep_attr.send_cq); | |
c56c65fb TT |
829 | if (rc) |
830 | dprintk("RPC: %s: ib_destroy_cq returned %i\n", | |
831 | __func__, rc); | |
c56c65fb TT |
832 | } |
833 | ||
834 | /* | |
835 | * Connect unconnected endpoint. | |
836 | */ | |
837 | int | |
838 | rpcrdma_ep_connect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) | |
839 | { | |
840 | struct rdma_cm_id *id; | |
841 | int rc = 0; | |
842 | int retry_count = 0; | |
c56c65fb | 843 | |
c055551e | 844 | if (ep->rep_connected != 0) { |
c56c65fb TT |
845 | struct rpcrdma_xprt *xprt; |
846 | retry: | |
847 | rc = rpcrdma_ep_disconnect(ep, ia); | |
848 | if (rc && rc != -ENOTCONN) | |
849 | dprintk("RPC: %s: rpcrdma_ep_disconnect" | |
850 | " status %i\n", __func__, rc); | |
fc664485 CL |
851 | |
852 | rpcrdma_clean_cq(ep->rep_attr.recv_cq); | |
853 | rpcrdma_clean_cq(ep->rep_attr.send_cq); | |
c56c65fb TT |
854 | |
855 | xprt = container_of(ia, struct rpcrdma_xprt, rx_ia); | |
856 | id = rpcrdma_create_id(xprt, ia, | |
857 | (struct sockaddr *)&xprt->rx_data.addr); | |
858 | if (IS_ERR(id)) { | |
859 | rc = PTR_ERR(id); | |
860 | goto out; | |
861 | } | |
862 | /* TEMP TEMP TEMP - fail if new device: | |
863 | * Deregister/remarshal *all* requests! | |
864 | * Close and recreate adapter, pd, etc! | |
865 | * Re-determine all attributes still sane! | |
866 | * More stuff I haven't thought of! | |
867 | * Rrrgh! | |
868 | */ | |
869 | if (ia->ri_id->device != id->device) { | |
870 | printk("RPC: %s: can't reconnect on " | |
871 | "different device!\n", __func__); | |
872 | rdma_destroy_id(id); | |
873 | rc = -ENETDOWN; | |
874 | goto out; | |
875 | } | |
876 | /* END TEMP */ | |
1a954051 | 877 | rdma_destroy_qp(ia->ri_id); |
c56c65fb TT |
878 | rdma_destroy_id(ia->ri_id); |
879 | ia->ri_id = id; | |
880 | } | |
881 | ||
882 | rc = rdma_create_qp(ia->ri_id, ia->ri_pd, &ep->rep_attr); | |
883 | if (rc) { | |
884 | dprintk("RPC: %s: rdma_create_qp failed %i\n", | |
885 | __func__, rc); | |
886 | goto out; | |
887 | } | |
888 | ||
889 | /* XXX Tavor device performs badly with 2K MTU! */ | |
890 | if (strnicmp(ia->ri_id->device->dma_device->bus->name, "pci", 3) == 0) { | |
891 | struct pci_dev *pcid = to_pci_dev(ia->ri_id->device->dma_device); | |
892 | if (pcid->device == PCI_DEVICE_ID_MELLANOX_TAVOR && | |
893 | (pcid->vendor == PCI_VENDOR_ID_MELLANOX || | |
894 | pcid->vendor == PCI_VENDOR_ID_TOPSPIN)) { | |
895 | struct ib_qp_attr attr = { | |
896 | .path_mtu = IB_MTU_1024 | |
897 | }; | |
898 | rc = ib_modify_qp(ia->ri_id->qp, &attr, IB_QP_PATH_MTU); | |
899 | } | |
900 | } | |
901 | ||
c56c65fb TT |
902 | ep->rep_connected = 0; |
903 | ||
904 | rc = rdma_connect(ia->ri_id, &ep->rep_remote_cma); | |
905 | if (rc) { | |
906 | dprintk("RPC: %s: rdma_connect() failed with %i\n", | |
907 | __func__, rc); | |
908 | goto out; | |
909 | } | |
910 | ||
c56c65fb TT |
911 | wait_event_interruptible(ep->rep_connect_wait, ep->rep_connected != 0); |
912 | ||
913 | /* | |
914 | * Check state. A non-peer reject indicates no listener | |
915 | * (ECONNREFUSED), which may be a transient state. All | |
916 | * others indicate a transport condition which has already | |
917 | * undergone a best-effort. | |
918 | */ | |
f64f9e71 JP |
919 | if (ep->rep_connected == -ECONNREFUSED && |
920 | ++retry_count <= RDMA_CONNECT_RETRY_MAX) { | |
c56c65fb TT |
921 | dprintk("RPC: %s: non-peer_reject, retry\n", __func__); |
922 | goto retry; | |
923 | } | |
924 | if (ep->rep_connected <= 0) { | |
925 | /* Sometimes, the only way to reliably connect to remote | |
926 | * CMs is to use same nonzero values for ORD and IRD. */ | |
b334eaab TT |
927 | if (retry_count++ <= RDMA_CONNECT_RETRY_MAX + 1 && |
928 | (ep->rep_remote_cma.responder_resources == 0 || | |
929 | ep->rep_remote_cma.initiator_depth != | |
930 | ep->rep_remote_cma.responder_resources)) { | |
931 | if (ep->rep_remote_cma.responder_resources == 0) | |
932 | ep->rep_remote_cma.responder_resources = 1; | |
933 | ep->rep_remote_cma.initiator_depth = | |
934 | ep->rep_remote_cma.responder_resources; | |
c56c65fb | 935 | goto retry; |
b334eaab | 936 | } |
c56c65fb TT |
937 | rc = ep->rep_connected; |
938 | } else { | |
939 | dprintk("RPC: %s: connected\n", __func__); | |
940 | } | |
941 | ||
942 | out: | |
943 | if (rc) | |
944 | ep->rep_connected = rc; | |
945 | return rc; | |
946 | } | |
947 | ||
948 | /* | |
949 | * rpcrdma_ep_disconnect | |
950 | * | |
951 | * This is separate from destroy to facilitate the ability | |
952 | * to reconnect without recreating the endpoint. | |
953 | * | |
954 | * This call is not reentrant, and must not be made in parallel | |
955 | * on the same endpoint. | |
956 | */ | |
957 | int | |
958 | rpcrdma_ep_disconnect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) | |
959 | { | |
960 | int rc; | |
961 | ||
fc664485 CL |
962 | rpcrdma_clean_cq(ep->rep_attr.recv_cq); |
963 | rpcrdma_clean_cq(ep->rep_attr.send_cq); | |
c56c65fb TT |
964 | rc = rdma_disconnect(ia->ri_id); |
965 | if (!rc) { | |
966 | /* returns without wait if not connected */ | |
967 | wait_event_interruptible(ep->rep_connect_wait, | |
968 | ep->rep_connected != 1); | |
969 | dprintk("RPC: %s: after wait, %sconnected\n", __func__, | |
970 | (ep->rep_connected == 1) ? "still " : "dis"); | |
971 | } else { | |
972 | dprintk("RPC: %s: rdma_disconnect %i\n", __func__, rc); | |
973 | ep->rep_connected = rc; | |
974 | } | |
975 | return rc; | |
976 | } | |
977 | ||
978 | /* | |
979 | * Initialize buffer memory | |
980 | */ | |
981 | int | |
982 | rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, | |
983 | struct rpcrdma_ia *ia, struct rpcrdma_create_data_internal *cdata) | |
984 | { | |
985 | char *p; | |
986 | size_t len; | |
987 | int i, rc; | |
8d4ba034 | 988 | struct rpcrdma_mw *r; |
c56c65fb TT |
989 | |
990 | buf->rb_max_requests = cdata->max_requests; | |
991 | spin_lock_init(&buf->rb_lock); | |
992 | atomic_set(&buf->rb_credits, 1); | |
993 | ||
994 | /* Need to allocate: | |
995 | * 1. arrays for send and recv pointers | |
996 | * 2. arrays of struct rpcrdma_req to fill in pointers | |
997 | * 3. array of struct rpcrdma_rep for replies | |
998 | * 4. padding, if any | |
3197d309 | 999 | * 5. mw's, fmr's or frmr's, if any |
c56c65fb TT |
1000 | * Send/recv buffers in req/rep need to be registered |
1001 | */ | |
1002 | ||
1003 | len = buf->rb_max_requests * | |
1004 | (sizeof(struct rpcrdma_req *) + sizeof(struct rpcrdma_rep *)); | |
1005 | len += cdata->padding; | |
1006 | switch (ia->ri_memreg_strategy) { | |
3197d309 TT |
1007 | case RPCRDMA_FRMR: |
1008 | len += buf->rb_max_requests * RPCRDMA_MAX_SEGS * | |
1009 | sizeof(struct rpcrdma_mw); | |
1010 | break; | |
c56c65fb TT |
1011 | case RPCRDMA_MTHCAFMR: |
1012 | /* TBD we are perhaps overallocating here */ | |
1013 | len += (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS * | |
1014 | sizeof(struct rpcrdma_mw); | |
1015 | break; | |
c56c65fb TT |
1016 | default: |
1017 | break; | |
1018 | } | |
1019 | ||
1020 | /* allocate 1, 4 and 5 in one shot */ | |
1021 | p = kzalloc(len, GFP_KERNEL); | |
1022 | if (p == NULL) { | |
1023 | dprintk("RPC: %s: req_t/rep_t/pad kzalloc(%zd) failed\n", | |
1024 | __func__, len); | |
1025 | rc = -ENOMEM; | |
1026 | goto out; | |
1027 | } | |
1028 | buf->rb_pool = p; /* for freeing it later */ | |
1029 | ||
1030 | buf->rb_send_bufs = (struct rpcrdma_req **) p; | |
1031 | p = (char *) &buf->rb_send_bufs[buf->rb_max_requests]; | |
1032 | buf->rb_recv_bufs = (struct rpcrdma_rep **) p; | |
1033 | p = (char *) &buf->rb_recv_bufs[buf->rb_max_requests]; | |
1034 | ||
1035 | /* | |
1036 | * Register the zeroed pad buffer, if any. | |
1037 | */ | |
1038 | if (cdata->padding) { | |
1039 | rc = rpcrdma_register_internal(ia, p, cdata->padding, | |
1040 | &ep->rep_pad_mr, &ep->rep_pad); | |
1041 | if (rc) | |
1042 | goto out; | |
1043 | } | |
1044 | p += cdata->padding; | |
1045 | ||
c56c65fb | 1046 | INIT_LIST_HEAD(&buf->rb_mws); |
8d4ba034 | 1047 | r = (struct rpcrdma_mw *)p; |
c56c65fb | 1048 | switch (ia->ri_memreg_strategy) { |
3197d309 TT |
1049 | case RPCRDMA_FRMR: |
1050 | for (i = buf->rb_max_requests * RPCRDMA_MAX_SEGS; i; i--) { | |
1051 | r->r.frmr.fr_mr = ib_alloc_fast_reg_mr(ia->ri_pd, | |
0fc6c4e7 | 1052 | ia->ri_max_frmr_depth); |
3197d309 TT |
1053 | if (IS_ERR(r->r.frmr.fr_mr)) { |
1054 | rc = PTR_ERR(r->r.frmr.fr_mr); | |
1055 | dprintk("RPC: %s: ib_alloc_fast_reg_mr" | |
1056 | " failed %i\n", __func__, rc); | |
1057 | goto out; | |
1058 | } | |
0fc6c4e7 SW |
1059 | r->r.frmr.fr_pgl = ib_alloc_fast_reg_page_list( |
1060 | ia->ri_id->device, | |
1061 | ia->ri_max_frmr_depth); | |
3197d309 TT |
1062 | if (IS_ERR(r->r.frmr.fr_pgl)) { |
1063 | rc = PTR_ERR(r->r.frmr.fr_pgl); | |
1064 | dprintk("RPC: %s: " | |
1065 | "ib_alloc_fast_reg_page_list " | |
1066 | "failed %i\n", __func__, rc); | |
4034ba04 AA |
1067 | |
1068 | ib_dereg_mr(r->r.frmr.fr_mr); | |
3197d309 TT |
1069 | goto out; |
1070 | } | |
1071 | list_add(&r->mw_list, &buf->rb_mws); | |
1072 | ++r; | |
1073 | } | |
1074 | break; | |
c56c65fb | 1075 | case RPCRDMA_MTHCAFMR: |
c56c65fb TT |
1076 | /* TBD we are perhaps overallocating here */ |
1077 | for (i = (buf->rb_max_requests+1) * RPCRDMA_MAX_SEGS; i; i--) { | |
8d4ba034 TT |
1078 | static struct ib_fmr_attr fa = |
1079 | { RPCRDMA_MAX_DATA_SEGS, 1, PAGE_SHIFT }; | |
c56c65fb TT |
1080 | r->r.fmr = ib_alloc_fmr(ia->ri_pd, |
1081 | IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ, | |
1082 | &fa); | |
1083 | if (IS_ERR(r->r.fmr)) { | |
1084 | rc = PTR_ERR(r->r.fmr); | |
1085 | dprintk("RPC: %s: ib_alloc_fmr" | |
1086 | " failed %i\n", __func__, rc); | |
1087 | goto out; | |
1088 | } | |
1089 | list_add(&r->mw_list, &buf->rb_mws); | |
1090 | ++r; | |
1091 | } | |
c56c65fb | 1092 | break; |
c56c65fb TT |
1093 | default: |
1094 | break; | |
1095 | } | |
1096 | ||
1097 | /* | |
1098 | * Allocate/init the request/reply buffers. Doing this | |
1099 | * using kmalloc for now -- one for each buf. | |
1100 | */ | |
1101 | for (i = 0; i < buf->rb_max_requests; i++) { | |
1102 | struct rpcrdma_req *req; | |
1103 | struct rpcrdma_rep *rep; | |
1104 | ||
1105 | len = cdata->inline_wsize + sizeof(struct rpcrdma_req); | |
1106 | /* RPC layer requests *double* size + 1K RPC_SLACK_SPACE! */ | |
1107 | /* Typical ~2400b, so rounding up saves work later */ | |
1108 | if (len < 4096) | |
1109 | len = 4096; | |
1110 | req = kmalloc(len, GFP_KERNEL); | |
1111 | if (req == NULL) { | |
1112 | dprintk("RPC: %s: request buffer %d alloc" | |
1113 | " failed\n", __func__, i); | |
1114 | rc = -ENOMEM; | |
1115 | goto out; | |
1116 | } | |
1117 | memset(req, 0, sizeof(struct rpcrdma_req)); | |
1118 | buf->rb_send_bufs[i] = req; | |
1119 | buf->rb_send_bufs[i]->rl_buffer = buf; | |
1120 | ||
1121 | rc = rpcrdma_register_internal(ia, req->rl_base, | |
1122 | len - offsetof(struct rpcrdma_req, rl_base), | |
1123 | &buf->rb_send_bufs[i]->rl_handle, | |
1124 | &buf->rb_send_bufs[i]->rl_iov); | |
1125 | if (rc) | |
1126 | goto out; | |
1127 | ||
1128 | buf->rb_send_bufs[i]->rl_size = len-sizeof(struct rpcrdma_req); | |
1129 | ||
1130 | len = cdata->inline_rsize + sizeof(struct rpcrdma_rep); | |
1131 | rep = kmalloc(len, GFP_KERNEL); | |
1132 | if (rep == NULL) { | |
1133 | dprintk("RPC: %s: reply buffer %d alloc failed\n", | |
1134 | __func__, i); | |
1135 | rc = -ENOMEM; | |
1136 | goto out; | |
1137 | } | |
1138 | memset(rep, 0, sizeof(struct rpcrdma_rep)); | |
1139 | buf->rb_recv_bufs[i] = rep; | |
1140 | buf->rb_recv_bufs[i]->rr_buffer = buf; | |
c56c65fb TT |
1141 | |
1142 | rc = rpcrdma_register_internal(ia, rep->rr_base, | |
1143 | len - offsetof(struct rpcrdma_rep, rr_base), | |
1144 | &buf->rb_recv_bufs[i]->rr_handle, | |
1145 | &buf->rb_recv_bufs[i]->rr_iov); | |
1146 | if (rc) | |
1147 | goto out; | |
1148 | ||
1149 | } | |
1150 | dprintk("RPC: %s: max_requests %d\n", | |
1151 | __func__, buf->rb_max_requests); | |
1152 | /* done */ | |
1153 | return 0; | |
1154 | out: | |
1155 | rpcrdma_buffer_destroy(buf); | |
1156 | return rc; | |
1157 | } | |
1158 | ||
1159 | /* | |
1160 | * Unregister and destroy buffer memory. Need to deal with | |
1161 | * partial initialization, so it's callable from failed create. | |
1162 | * Must be called before destroying endpoint, as registrations | |
1163 | * reference it. | |
1164 | */ | |
1165 | void | |
1166 | rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf) | |
1167 | { | |
1168 | int rc, i; | |
1169 | struct rpcrdma_ia *ia = rdmab_to_ia(buf); | |
8d4ba034 | 1170 | struct rpcrdma_mw *r; |
c56c65fb TT |
1171 | |
1172 | /* clean up in reverse order from create | |
1173 | * 1. recv mr memory (mr free, then kfree) | |
c56c65fb TT |
1174 | * 2. send mr memory (mr free, then kfree) |
1175 | * 3. padding (if any) [moved to rpcrdma_ep_destroy] | |
1176 | * 4. arrays | |
1177 | */ | |
1178 | dprintk("RPC: %s: entering\n", __func__); | |
1179 | ||
1180 | for (i = 0; i < buf->rb_max_requests; i++) { | |
1181 | if (buf->rb_recv_bufs && buf->rb_recv_bufs[i]) { | |
1182 | rpcrdma_deregister_internal(ia, | |
1183 | buf->rb_recv_bufs[i]->rr_handle, | |
1184 | &buf->rb_recv_bufs[i]->rr_iov); | |
1185 | kfree(buf->rb_recv_bufs[i]); | |
1186 | } | |
1187 | if (buf->rb_send_bufs && buf->rb_send_bufs[i]) { | |
c56c65fb TT |
1188 | rpcrdma_deregister_internal(ia, |
1189 | buf->rb_send_bufs[i]->rl_handle, | |
1190 | &buf->rb_send_bufs[i]->rl_iov); | |
1191 | kfree(buf->rb_send_bufs[i]); | |
1192 | } | |
1193 | } | |
1194 | ||
4034ba04 AA |
1195 | while (!list_empty(&buf->rb_mws)) { |
1196 | r = list_entry(buf->rb_mws.next, | |
1197 | struct rpcrdma_mw, mw_list); | |
1198 | list_del(&r->mw_list); | |
1199 | switch (ia->ri_memreg_strategy) { | |
1200 | case RPCRDMA_FRMR: | |
1201 | rc = ib_dereg_mr(r->r.frmr.fr_mr); | |
1202 | if (rc) | |
1203 | dprintk("RPC: %s:" | |
1204 | " ib_dereg_mr" | |
1205 | " failed %i\n", | |
1206 | __func__, rc); | |
1207 | ib_free_fast_reg_page_list(r->r.frmr.fr_pgl); | |
1208 | break; | |
1209 | case RPCRDMA_MTHCAFMR: | |
1210 | rc = ib_dealloc_fmr(r->r.fmr); | |
1211 | if (rc) | |
1212 | dprintk("RPC: %s:" | |
1213 | " ib_dealloc_fmr" | |
1214 | " failed %i\n", | |
1215 | __func__, rc); | |
1216 | break; | |
4034ba04 AA |
1217 | default: |
1218 | break; | |
1219 | } | |
1220 | } | |
1221 | ||
c56c65fb TT |
1222 | kfree(buf->rb_pool); |
1223 | } | |
1224 | ||
1225 | /* | |
1226 | * Get a set of request/reply buffers. | |
1227 | * | |
1228 | * Reply buffer (if needed) is attached to send buffer upon return. | |
1229 | * Rule: | |
1230 | * rb_send_index and rb_recv_index MUST always be pointing to the | |
1231 | * *next* available buffer (non-NULL). They are incremented after | |
1232 | * removing buffers, and decremented *before* returning them. | |
1233 | */ | |
1234 | struct rpcrdma_req * | |
1235 | rpcrdma_buffer_get(struct rpcrdma_buffer *buffers) | |
1236 | { | |
1237 | struct rpcrdma_req *req; | |
1238 | unsigned long flags; | |
8d4ba034 TT |
1239 | int i; |
1240 | struct rpcrdma_mw *r; | |
c56c65fb TT |
1241 | |
1242 | spin_lock_irqsave(&buffers->rb_lock, flags); | |
1243 | if (buffers->rb_send_index == buffers->rb_max_requests) { | |
1244 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1245 | dprintk("RPC: %s: out of request buffers\n", __func__); | |
1246 | return ((struct rpcrdma_req *)NULL); | |
1247 | } | |
1248 | ||
1249 | req = buffers->rb_send_bufs[buffers->rb_send_index]; | |
1250 | if (buffers->rb_send_index < buffers->rb_recv_index) { | |
1251 | dprintk("RPC: %s: %d extra receives outstanding (ok)\n", | |
1252 | __func__, | |
1253 | buffers->rb_recv_index - buffers->rb_send_index); | |
1254 | req->rl_reply = NULL; | |
1255 | } else { | |
1256 | req->rl_reply = buffers->rb_recv_bufs[buffers->rb_recv_index]; | |
1257 | buffers->rb_recv_bufs[buffers->rb_recv_index++] = NULL; | |
1258 | } | |
1259 | buffers->rb_send_bufs[buffers->rb_send_index++] = NULL; | |
1260 | if (!list_empty(&buffers->rb_mws)) { | |
8d4ba034 | 1261 | i = RPCRDMA_MAX_SEGS - 1; |
c56c65fb | 1262 | do { |
c56c65fb TT |
1263 | r = list_entry(buffers->rb_mws.next, |
1264 | struct rpcrdma_mw, mw_list); | |
1265 | list_del(&r->mw_list); | |
1266 | req->rl_segments[i].mr_chunk.rl_mw = r; | |
1267 | } while (--i >= 0); | |
1268 | } | |
1269 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1270 | return req; | |
1271 | } | |
1272 | ||
1273 | /* | |
1274 | * Put request/reply buffers back into pool. | |
1275 | * Pre-decrement counter/array index. | |
1276 | */ | |
1277 | void | |
1278 | rpcrdma_buffer_put(struct rpcrdma_req *req) | |
1279 | { | |
1280 | struct rpcrdma_buffer *buffers = req->rl_buffer; | |
1281 | struct rpcrdma_ia *ia = rdmab_to_ia(buffers); | |
1282 | int i; | |
1283 | unsigned long flags; | |
1284 | ||
1285 | BUG_ON(req->rl_nchunks != 0); | |
1286 | spin_lock_irqsave(&buffers->rb_lock, flags); | |
1287 | buffers->rb_send_bufs[--buffers->rb_send_index] = req; | |
1288 | req->rl_niovs = 0; | |
1289 | if (req->rl_reply) { | |
1290 | buffers->rb_recv_bufs[--buffers->rb_recv_index] = req->rl_reply; | |
c56c65fb TT |
1291 | req->rl_reply->rr_func = NULL; |
1292 | req->rl_reply = NULL; | |
1293 | } | |
1294 | switch (ia->ri_memreg_strategy) { | |
3197d309 | 1295 | case RPCRDMA_FRMR: |
c56c65fb | 1296 | case RPCRDMA_MTHCAFMR: |
c56c65fb TT |
1297 | /* |
1298 | * Cycle mw's back in reverse order, and "spin" them. | |
1299 | * This delays and scrambles reuse as much as possible. | |
1300 | */ | |
1301 | i = 1; | |
1302 | do { | |
1303 | struct rpcrdma_mw **mw; | |
1304 | mw = &req->rl_segments[i].mr_chunk.rl_mw; | |
1305 | list_add_tail(&(*mw)->mw_list, &buffers->rb_mws); | |
1306 | *mw = NULL; | |
1307 | } while (++i < RPCRDMA_MAX_SEGS); | |
1308 | list_add_tail(&req->rl_segments[0].mr_chunk.rl_mw->mw_list, | |
1309 | &buffers->rb_mws); | |
1310 | req->rl_segments[0].mr_chunk.rl_mw = NULL; | |
1311 | break; | |
1312 | default: | |
1313 | break; | |
1314 | } | |
1315 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1316 | } | |
1317 | ||
1318 | /* | |
1319 | * Recover reply buffers from pool. | |
1320 | * This happens when recovering from error conditions. | |
1321 | * Post-increment counter/array index. | |
1322 | */ | |
1323 | void | |
1324 | rpcrdma_recv_buffer_get(struct rpcrdma_req *req) | |
1325 | { | |
1326 | struct rpcrdma_buffer *buffers = req->rl_buffer; | |
1327 | unsigned long flags; | |
1328 | ||
1329 | if (req->rl_iov.length == 0) /* special case xprt_rdma_allocate() */ | |
1330 | buffers = ((struct rpcrdma_req *) buffers)->rl_buffer; | |
1331 | spin_lock_irqsave(&buffers->rb_lock, flags); | |
1332 | if (buffers->rb_recv_index < buffers->rb_max_requests) { | |
1333 | req->rl_reply = buffers->rb_recv_bufs[buffers->rb_recv_index]; | |
1334 | buffers->rb_recv_bufs[buffers->rb_recv_index++] = NULL; | |
1335 | } | |
1336 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1337 | } | |
1338 | ||
1339 | /* | |
1340 | * Put reply buffers back into pool when not attached to | |
b45ccfd2 | 1341 | * request. This happens in error conditions. |
c56c65fb TT |
1342 | */ |
1343 | void | |
1344 | rpcrdma_recv_buffer_put(struct rpcrdma_rep *rep) | |
1345 | { | |
1346 | struct rpcrdma_buffer *buffers = rep->rr_buffer; | |
1347 | unsigned long flags; | |
1348 | ||
1349 | rep->rr_func = NULL; | |
1350 | spin_lock_irqsave(&buffers->rb_lock, flags); | |
1351 | buffers->rb_recv_bufs[--buffers->rb_recv_index] = rep; | |
1352 | spin_unlock_irqrestore(&buffers->rb_lock, flags); | |
1353 | } | |
1354 | ||
1355 | /* | |
1356 | * Wrappers for internal-use kmalloc memory registration, used by buffer code. | |
1357 | */ | |
1358 | ||
1359 | int | |
1360 | rpcrdma_register_internal(struct rpcrdma_ia *ia, void *va, int len, | |
1361 | struct ib_mr **mrp, struct ib_sge *iov) | |
1362 | { | |
1363 | struct ib_phys_buf ipb; | |
1364 | struct ib_mr *mr; | |
1365 | int rc; | |
1366 | ||
1367 | /* | |
1368 | * All memory passed here was kmalloc'ed, therefore phys-contiguous. | |
1369 | */ | |
1370 | iov->addr = ib_dma_map_single(ia->ri_id->device, | |
1371 | va, len, DMA_BIDIRECTIONAL); | |
1372 | iov->length = len; | |
1373 | ||
bd7ed1d1 TT |
1374 | if (ia->ri_have_dma_lkey) { |
1375 | *mrp = NULL; | |
1376 | iov->lkey = ia->ri_dma_lkey; | |
1377 | return 0; | |
1378 | } else if (ia->ri_bind_mem != NULL) { | |
c56c65fb TT |
1379 | *mrp = NULL; |
1380 | iov->lkey = ia->ri_bind_mem->lkey; | |
1381 | return 0; | |
1382 | } | |
1383 | ||
1384 | ipb.addr = iov->addr; | |
1385 | ipb.size = iov->length; | |
1386 | mr = ib_reg_phys_mr(ia->ri_pd, &ipb, 1, | |
1387 | IB_ACCESS_LOCAL_WRITE, &iov->addr); | |
1388 | ||
1389 | dprintk("RPC: %s: phys convert: 0x%llx " | |
1390 | "registered 0x%llx length %d\n", | |
a56daeb7 AM |
1391 | __func__, (unsigned long long)ipb.addr, |
1392 | (unsigned long long)iov->addr, len); | |
c56c65fb TT |
1393 | |
1394 | if (IS_ERR(mr)) { | |
1395 | *mrp = NULL; | |
1396 | rc = PTR_ERR(mr); | |
1397 | dprintk("RPC: %s: failed with %i\n", __func__, rc); | |
1398 | } else { | |
1399 | *mrp = mr; | |
1400 | iov->lkey = mr->lkey; | |
1401 | rc = 0; | |
1402 | } | |
1403 | ||
1404 | return rc; | |
1405 | } | |
1406 | ||
1407 | int | |
1408 | rpcrdma_deregister_internal(struct rpcrdma_ia *ia, | |
1409 | struct ib_mr *mr, struct ib_sge *iov) | |
1410 | { | |
1411 | int rc; | |
1412 | ||
1413 | ib_dma_unmap_single(ia->ri_id->device, | |
1414 | iov->addr, iov->length, DMA_BIDIRECTIONAL); | |
1415 | ||
1416 | if (NULL == mr) | |
1417 | return 0; | |
1418 | ||
1419 | rc = ib_dereg_mr(mr); | |
1420 | if (rc) | |
1421 | dprintk("RPC: %s: ib_dereg_mr failed %i\n", __func__, rc); | |
1422 | return rc; | |
1423 | } | |
1424 | ||
1425 | /* | |
1426 | * Wrappers for chunk registration, shared by read/write chunk code. | |
1427 | */ | |
1428 | ||
1429 | static void | |
1430 | rpcrdma_map_one(struct rpcrdma_ia *ia, struct rpcrdma_mr_seg *seg, int writing) | |
1431 | { | |
1432 | seg->mr_dir = writing ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
1433 | seg->mr_dmalen = seg->mr_len; | |
1434 | if (seg->mr_page) | |
1435 | seg->mr_dma = ib_dma_map_page(ia->ri_id->device, | |
1436 | seg->mr_page, offset_in_page(seg->mr_offset), | |
1437 | seg->mr_dmalen, seg->mr_dir); | |
1438 | else | |
1439 | seg->mr_dma = ib_dma_map_single(ia->ri_id->device, | |
1440 | seg->mr_offset, | |
1441 | seg->mr_dmalen, seg->mr_dir); | |
5c635e09 TT |
1442 | if (ib_dma_mapping_error(ia->ri_id->device, seg->mr_dma)) { |
1443 | dprintk("RPC: %s: mr_dma %llx mr_offset %p mr_dma_len %zu\n", | |
1444 | __func__, | |
986d4abb RD |
1445 | (unsigned long long)seg->mr_dma, |
1446 | seg->mr_offset, seg->mr_dmalen); | |
5c635e09 | 1447 | } |
c56c65fb TT |
1448 | } |
1449 | ||
1450 | static void | |
1451 | rpcrdma_unmap_one(struct rpcrdma_ia *ia, struct rpcrdma_mr_seg *seg) | |
1452 | { | |
1453 | if (seg->mr_page) | |
1454 | ib_dma_unmap_page(ia->ri_id->device, | |
1455 | seg->mr_dma, seg->mr_dmalen, seg->mr_dir); | |
1456 | else | |
1457 | ib_dma_unmap_single(ia->ri_id->device, | |
1458 | seg->mr_dma, seg->mr_dmalen, seg->mr_dir); | |
1459 | } | |
1460 | ||
3197d309 TT |
1461 | static int |
1462 | rpcrdma_register_frmr_external(struct rpcrdma_mr_seg *seg, | |
1463 | int *nsegs, int writing, struct rpcrdma_ia *ia, | |
1464 | struct rpcrdma_xprt *r_xprt) | |
1465 | { | |
1466 | struct rpcrdma_mr_seg *seg1 = seg; | |
5c635e09 TT |
1467 | struct ib_send_wr invalidate_wr, frmr_wr, *bad_wr, *post_wr; |
1468 | ||
3197d309 TT |
1469 | u8 key; |
1470 | int len, pageoff; | |
1471 | int i, rc; | |
9b78145c TT |
1472 | int seg_len; |
1473 | u64 pa; | |
1474 | int page_no; | |
3197d309 TT |
1475 | |
1476 | pageoff = offset_in_page(seg1->mr_offset); | |
1477 | seg1->mr_offset -= pageoff; /* start of page */ | |
1478 | seg1->mr_len += pageoff; | |
1479 | len = -pageoff; | |
0fc6c4e7 SW |
1480 | if (*nsegs > ia->ri_max_frmr_depth) |
1481 | *nsegs = ia->ri_max_frmr_depth; | |
9b78145c | 1482 | for (page_no = i = 0; i < *nsegs;) { |
3197d309 | 1483 | rpcrdma_map_one(ia, seg, writing); |
9b78145c TT |
1484 | pa = seg->mr_dma; |
1485 | for (seg_len = seg->mr_len; seg_len > 0; seg_len -= PAGE_SIZE) { | |
1486 | seg1->mr_chunk.rl_mw->r.frmr.fr_pgl-> | |
1487 | page_list[page_no++] = pa; | |
1488 | pa += PAGE_SIZE; | |
1489 | } | |
3197d309 TT |
1490 | len += seg->mr_len; |
1491 | ++seg; | |
1492 | ++i; | |
1493 | /* Check for holes */ | |
1494 | if ((i < *nsegs && offset_in_page(seg->mr_offset)) || | |
1495 | offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len)) | |
1496 | break; | |
1497 | } | |
1498 | dprintk("RPC: %s: Using frmr %p to map %d segments\n", | |
1499 | __func__, seg1->mr_chunk.rl_mw, i); | |
1500 | ||
5c635e09 TT |
1501 | if (unlikely(seg1->mr_chunk.rl_mw->r.frmr.state == FRMR_IS_VALID)) { |
1502 | dprintk("RPC: %s: frmr %x left valid, posting invalidate.\n", | |
1503 | __func__, | |
1504 | seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey); | |
1505 | /* Invalidate before using. */ | |
1506 | memset(&invalidate_wr, 0, sizeof invalidate_wr); | |
1507 | invalidate_wr.wr_id = (unsigned long)(void *)seg1->mr_chunk.rl_mw; | |
1508 | invalidate_wr.next = &frmr_wr; | |
1509 | invalidate_wr.opcode = IB_WR_LOCAL_INV; | |
1510 | invalidate_wr.send_flags = IB_SEND_SIGNALED; | |
1511 | invalidate_wr.ex.invalidate_rkey = | |
1512 | seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey; | |
1513 | DECR_CQCOUNT(&r_xprt->rx_ep); | |
1514 | post_wr = &invalidate_wr; | |
1515 | } else | |
1516 | post_wr = &frmr_wr; | |
1517 | ||
3197d309 TT |
1518 | /* Bump the key */ |
1519 | key = (u8)(seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey & 0x000000FF); | |
1520 | ib_update_fast_reg_key(seg1->mr_chunk.rl_mw->r.frmr.fr_mr, ++key); | |
1521 | ||
1522 | /* Prepare FRMR WR */ | |
1523 | memset(&frmr_wr, 0, sizeof frmr_wr); | |
5c635e09 | 1524 | frmr_wr.wr_id = (unsigned long)(void *)seg1->mr_chunk.rl_mw; |
3197d309 | 1525 | frmr_wr.opcode = IB_WR_FAST_REG_MR; |
5c635e09 | 1526 | frmr_wr.send_flags = IB_SEND_SIGNALED; |
7a8b80eb | 1527 | frmr_wr.wr.fast_reg.iova_start = seg1->mr_dma; |
3197d309 | 1528 | frmr_wr.wr.fast_reg.page_list = seg1->mr_chunk.rl_mw->r.frmr.fr_pgl; |
9b78145c | 1529 | frmr_wr.wr.fast_reg.page_list_len = page_no; |
3197d309 | 1530 | frmr_wr.wr.fast_reg.page_shift = PAGE_SHIFT; |
9b78145c | 1531 | frmr_wr.wr.fast_reg.length = page_no << PAGE_SHIFT; |
5c635e09 | 1532 | BUG_ON(frmr_wr.wr.fast_reg.length < len); |
3197d309 | 1533 | frmr_wr.wr.fast_reg.access_flags = (writing ? |
68743082 VP |
1534 | IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE : |
1535 | IB_ACCESS_REMOTE_READ); | |
3197d309 TT |
1536 | frmr_wr.wr.fast_reg.rkey = seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey; |
1537 | DECR_CQCOUNT(&r_xprt->rx_ep); | |
1538 | ||
5c635e09 | 1539 | rc = ib_post_send(ia->ri_id->qp, post_wr, &bad_wr); |
3197d309 TT |
1540 | |
1541 | if (rc) { | |
1542 | dprintk("RPC: %s: failed ib_post_send for register," | |
1543 | " status %i\n", __func__, rc); | |
1544 | while (i--) | |
1545 | rpcrdma_unmap_one(ia, --seg); | |
1546 | } else { | |
1547 | seg1->mr_rkey = seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey; | |
1548 | seg1->mr_base = seg1->mr_dma + pageoff; | |
1549 | seg1->mr_nsegs = i; | |
1550 | seg1->mr_len = len; | |
1551 | } | |
1552 | *nsegs = i; | |
1553 | return rc; | |
1554 | } | |
1555 | ||
1556 | static int | |
1557 | rpcrdma_deregister_frmr_external(struct rpcrdma_mr_seg *seg, | |
1558 | struct rpcrdma_ia *ia, struct rpcrdma_xprt *r_xprt) | |
1559 | { | |
1560 | struct rpcrdma_mr_seg *seg1 = seg; | |
1561 | struct ib_send_wr invalidate_wr, *bad_wr; | |
1562 | int rc; | |
1563 | ||
1564 | while (seg1->mr_nsegs--) | |
1565 | rpcrdma_unmap_one(ia, seg++); | |
1566 | ||
1567 | memset(&invalidate_wr, 0, sizeof invalidate_wr); | |
5c635e09 | 1568 | invalidate_wr.wr_id = (unsigned long)(void *)seg1->mr_chunk.rl_mw; |
3197d309 | 1569 | invalidate_wr.opcode = IB_WR_LOCAL_INV; |
5c635e09 | 1570 | invalidate_wr.send_flags = IB_SEND_SIGNALED; |
3197d309 TT |
1571 | invalidate_wr.ex.invalidate_rkey = seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey; |
1572 | DECR_CQCOUNT(&r_xprt->rx_ep); | |
1573 | ||
1574 | rc = ib_post_send(ia->ri_id->qp, &invalidate_wr, &bad_wr); | |
1575 | if (rc) | |
1576 | dprintk("RPC: %s: failed ib_post_send for invalidate," | |
1577 | " status %i\n", __func__, rc); | |
1578 | return rc; | |
1579 | } | |
1580 | ||
8d4ba034 TT |
1581 | static int |
1582 | rpcrdma_register_fmr_external(struct rpcrdma_mr_seg *seg, | |
1583 | int *nsegs, int writing, struct rpcrdma_ia *ia) | |
1584 | { | |
1585 | struct rpcrdma_mr_seg *seg1 = seg; | |
1586 | u64 physaddrs[RPCRDMA_MAX_DATA_SEGS]; | |
1587 | int len, pageoff, i, rc; | |
1588 | ||
1589 | pageoff = offset_in_page(seg1->mr_offset); | |
1590 | seg1->mr_offset -= pageoff; /* start of page */ | |
1591 | seg1->mr_len += pageoff; | |
1592 | len = -pageoff; | |
1593 | if (*nsegs > RPCRDMA_MAX_DATA_SEGS) | |
1594 | *nsegs = RPCRDMA_MAX_DATA_SEGS; | |
1595 | for (i = 0; i < *nsegs;) { | |
1596 | rpcrdma_map_one(ia, seg, writing); | |
1597 | physaddrs[i] = seg->mr_dma; | |
1598 | len += seg->mr_len; | |
1599 | ++seg; | |
1600 | ++i; | |
1601 | /* Check for holes */ | |
1602 | if ((i < *nsegs && offset_in_page(seg->mr_offset)) || | |
1603 | offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len)) | |
1604 | break; | |
1605 | } | |
1606 | rc = ib_map_phys_fmr(seg1->mr_chunk.rl_mw->r.fmr, | |
1607 | physaddrs, i, seg1->mr_dma); | |
1608 | if (rc) { | |
1609 | dprintk("RPC: %s: failed ib_map_phys_fmr " | |
1610 | "%u@0x%llx+%i (%d)... status %i\n", __func__, | |
1611 | len, (unsigned long long)seg1->mr_dma, | |
1612 | pageoff, i, rc); | |
1613 | while (i--) | |
1614 | rpcrdma_unmap_one(ia, --seg); | |
1615 | } else { | |
1616 | seg1->mr_rkey = seg1->mr_chunk.rl_mw->r.fmr->rkey; | |
1617 | seg1->mr_base = seg1->mr_dma + pageoff; | |
1618 | seg1->mr_nsegs = i; | |
1619 | seg1->mr_len = len; | |
1620 | } | |
1621 | *nsegs = i; | |
1622 | return rc; | |
1623 | } | |
1624 | ||
1625 | static int | |
1626 | rpcrdma_deregister_fmr_external(struct rpcrdma_mr_seg *seg, | |
1627 | struct rpcrdma_ia *ia) | |
1628 | { | |
1629 | struct rpcrdma_mr_seg *seg1 = seg; | |
1630 | LIST_HEAD(l); | |
1631 | int rc; | |
1632 | ||
1633 | list_add(&seg1->mr_chunk.rl_mw->r.fmr->list, &l); | |
1634 | rc = ib_unmap_fmr(&l); | |
1635 | while (seg1->mr_nsegs--) | |
1636 | rpcrdma_unmap_one(ia, seg++); | |
1637 | if (rc) | |
1638 | dprintk("RPC: %s: failed ib_unmap_fmr," | |
1639 | " status %i\n", __func__, rc); | |
1640 | return rc; | |
1641 | } | |
1642 | ||
c56c65fb TT |
1643 | int |
1644 | rpcrdma_register_external(struct rpcrdma_mr_seg *seg, | |
1645 | int nsegs, int writing, struct rpcrdma_xprt *r_xprt) | |
1646 | { | |
1647 | struct rpcrdma_ia *ia = &r_xprt->rx_ia; | |
c56c65fb TT |
1648 | int rc = 0; |
1649 | ||
1650 | switch (ia->ri_memreg_strategy) { | |
1651 | ||
1652 | #if RPCRDMA_PERSISTENT_REGISTRATION | |
1653 | case RPCRDMA_ALLPHYSICAL: | |
1654 | rpcrdma_map_one(ia, seg, writing); | |
1655 | seg->mr_rkey = ia->ri_bind_mem->rkey; | |
1656 | seg->mr_base = seg->mr_dma; | |
1657 | seg->mr_nsegs = 1; | |
1658 | nsegs = 1; | |
1659 | break; | |
1660 | #endif | |
1661 | ||
3197d309 TT |
1662 | /* Registration using frmr registration */ |
1663 | case RPCRDMA_FRMR: | |
1664 | rc = rpcrdma_register_frmr_external(seg, &nsegs, writing, ia, r_xprt); | |
1665 | break; | |
1666 | ||
8d4ba034 | 1667 | /* Registration using fmr memory registration */ |
c56c65fb | 1668 | case RPCRDMA_MTHCAFMR: |
8d4ba034 | 1669 | rc = rpcrdma_register_fmr_external(seg, &nsegs, writing, ia); |
c56c65fb TT |
1670 | break; |
1671 | ||
c56c65fb | 1672 | default: |
0ac531c1 | 1673 | return -1; |
c56c65fb TT |
1674 | } |
1675 | if (rc) | |
1676 | return -1; | |
1677 | ||
1678 | return nsegs; | |
1679 | } | |
1680 | ||
1681 | int | |
1682 | rpcrdma_deregister_external(struct rpcrdma_mr_seg *seg, | |
13c9ff8f | 1683 | struct rpcrdma_xprt *r_xprt) |
c56c65fb TT |
1684 | { |
1685 | struct rpcrdma_ia *ia = &r_xprt->rx_ia; | |
c56c65fb TT |
1686 | int nsegs = seg->mr_nsegs, rc; |
1687 | ||
1688 | switch (ia->ri_memreg_strategy) { | |
1689 | ||
1690 | #if RPCRDMA_PERSISTENT_REGISTRATION | |
1691 | case RPCRDMA_ALLPHYSICAL: | |
1692 | BUG_ON(nsegs != 1); | |
1693 | rpcrdma_unmap_one(ia, seg); | |
1694 | rc = 0; | |
1695 | break; | |
1696 | #endif | |
1697 | ||
3197d309 TT |
1698 | case RPCRDMA_FRMR: |
1699 | rc = rpcrdma_deregister_frmr_external(seg, ia, r_xprt); | |
1700 | break; | |
1701 | ||
c56c65fb | 1702 | case RPCRDMA_MTHCAFMR: |
8d4ba034 | 1703 | rc = rpcrdma_deregister_fmr_external(seg, ia); |
c56c65fb TT |
1704 | break; |
1705 | ||
c56c65fb | 1706 | default: |
c56c65fb TT |
1707 | break; |
1708 | } | |
c56c65fb TT |
1709 | return nsegs; |
1710 | } | |
1711 | ||
1712 | /* | |
1713 | * Prepost any receive buffer, then post send. | |
1714 | * | |
1715 | * Receive buffer is donated to hardware, reclaimed upon recv completion. | |
1716 | */ | |
1717 | int | |
1718 | rpcrdma_ep_post(struct rpcrdma_ia *ia, | |
1719 | struct rpcrdma_ep *ep, | |
1720 | struct rpcrdma_req *req) | |
1721 | { | |
1722 | struct ib_send_wr send_wr, *send_wr_fail; | |
1723 | struct rpcrdma_rep *rep = req->rl_reply; | |
1724 | int rc; | |
1725 | ||
1726 | if (rep) { | |
1727 | rc = rpcrdma_ep_post_recv(ia, ep, rep); | |
1728 | if (rc) | |
1729 | goto out; | |
1730 | req->rl_reply = NULL; | |
1731 | } | |
1732 | ||
1733 | send_wr.next = NULL; | |
1734 | send_wr.wr_id = 0ULL; /* no send cookie */ | |
1735 | send_wr.sg_list = req->rl_send_iov; | |
1736 | send_wr.num_sge = req->rl_niovs; | |
1737 | send_wr.opcode = IB_WR_SEND; | |
c56c65fb TT |
1738 | if (send_wr.num_sge == 4) /* no need to sync any pad (constant) */ |
1739 | ib_dma_sync_single_for_device(ia->ri_id->device, | |
1740 | req->rl_send_iov[3].addr, req->rl_send_iov[3].length, | |
1741 | DMA_TO_DEVICE); | |
1742 | ib_dma_sync_single_for_device(ia->ri_id->device, | |
1743 | req->rl_send_iov[1].addr, req->rl_send_iov[1].length, | |
1744 | DMA_TO_DEVICE); | |
1745 | ib_dma_sync_single_for_device(ia->ri_id->device, | |
1746 | req->rl_send_iov[0].addr, req->rl_send_iov[0].length, | |
1747 | DMA_TO_DEVICE); | |
1748 | ||
1749 | if (DECR_CQCOUNT(ep) > 0) | |
1750 | send_wr.send_flags = 0; | |
1751 | else { /* Provider must take a send completion every now and then */ | |
1752 | INIT_CQCOUNT(ep); | |
1753 | send_wr.send_flags = IB_SEND_SIGNALED; | |
1754 | } | |
1755 | ||
1756 | rc = ib_post_send(ia->ri_id->qp, &send_wr, &send_wr_fail); | |
1757 | if (rc) | |
1758 | dprintk("RPC: %s: ib_post_send returned %i\n", __func__, | |
1759 | rc); | |
1760 | out: | |
1761 | return rc; | |
1762 | } | |
1763 | ||
1764 | /* | |
1765 | * (Re)post a receive buffer. | |
1766 | */ | |
1767 | int | |
1768 | rpcrdma_ep_post_recv(struct rpcrdma_ia *ia, | |
1769 | struct rpcrdma_ep *ep, | |
1770 | struct rpcrdma_rep *rep) | |
1771 | { | |
1772 | struct ib_recv_wr recv_wr, *recv_wr_fail; | |
1773 | int rc; | |
1774 | ||
1775 | recv_wr.next = NULL; | |
1776 | recv_wr.wr_id = (u64) (unsigned long) rep; | |
1777 | recv_wr.sg_list = &rep->rr_iov; | |
1778 | recv_wr.num_sge = 1; | |
1779 | ||
1780 | ib_dma_sync_single_for_cpu(ia->ri_id->device, | |
1781 | rep->rr_iov.addr, rep->rr_iov.length, DMA_BIDIRECTIONAL); | |
1782 | ||
c56c65fb TT |
1783 | rc = ib_post_recv(ia->ri_id->qp, &recv_wr, &recv_wr_fail); |
1784 | ||
1785 | if (rc) | |
1786 | dprintk("RPC: %s: ib_post_recv returned %i\n", __func__, | |
1787 | rc); | |
1788 | return rc; | |
1789 | } |