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f58851e6 TT |
1 | /* |
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. | |
38 | */ | |
39 | ||
40 | #ifndef _LINUX_SUNRPC_XPRT_RDMA_H | |
41 | #define _LINUX_SUNRPC_XPRT_RDMA_H | |
42 | ||
43 | #include <linux/wait.h> /* wait_queue_head_t, etc */ | |
44 | #include <linux/spinlock.h> /* spinlock_t, etc */ | |
60063497 | 45 | #include <linux/atomic.h> /* atomic_t, etc */ |
254f91e2 | 46 | #include <linux/workqueue.h> /* struct work_struct */ |
f58851e6 TT |
47 | |
48 | #include <rdma/rdma_cm.h> /* RDMA connection api */ | |
49 | #include <rdma/ib_verbs.h> /* RDMA verbs api */ | |
50 | ||
51 | #include <linux/sunrpc/clnt.h> /* rpc_xprt */ | |
52 | #include <linux/sunrpc/rpc_rdma.h> /* RPC/RDMA protocol */ | |
53 | #include <linux/sunrpc/xprtrdma.h> /* xprt parameters */ | |
54 | ||
5675add3 TT |
55 | #define RDMA_RESOLVE_TIMEOUT (5000) /* 5 seconds */ |
56 | #define RDMA_CONNECT_RETRY_MAX (2) /* retries if no listener backlog */ | |
57 | ||
5d252f90 CL |
58 | #define RPCRDMA_BIND_TO (60U * HZ) |
59 | #define RPCRDMA_INIT_REEST_TO (5U * HZ) | |
60 | #define RPCRDMA_MAX_REEST_TO (30U * HZ) | |
61 | #define RPCRDMA_IDLE_DISC_TO (5U * 60 * HZ) | |
62 | ||
f58851e6 TT |
63 | /* |
64 | * Interface Adapter -- one per transport instance | |
65 | */ | |
66 | struct rpcrdma_ia { | |
a0ce85f5 | 67 | const struct rpcrdma_memreg_ops *ri_ops; |
89e0d112 | 68 | struct ib_device *ri_device; |
f58851e6 TT |
69 | struct rdma_cm_id *ri_id; |
70 | struct ib_pd *ri_pd; | |
f58851e6 TT |
71 | struct completion ri_done; |
72 | int ri_async_rc; | |
0fc6c4e7 | 73 | unsigned int ri_max_frmr_depth; |
302d3deb CL |
74 | unsigned int ri_max_inline_write; |
75 | unsigned int ri_max_inline_read; | |
ce1ab9ab CL |
76 | struct ib_qp_attr ri_qp_attr; |
77 | struct ib_qp_init_attr ri_qp_init_attr; | |
f58851e6 TT |
78 | }; |
79 | ||
80 | /* | |
81 | * RDMA Endpoint -- one per transport instance | |
82 | */ | |
83 | ||
84 | struct rpcrdma_ep { | |
85 | atomic_t rep_cqcount; | |
86 | int rep_cqinit; | |
87 | int rep_connected; | |
f58851e6 TT |
88 | struct ib_qp_init_attr rep_attr; |
89 | wait_queue_head_t rep_connect_wait; | |
f58851e6 TT |
90 | struct rdma_conn_param rep_remote_cma; |
91 | struct sockaddr_storage rep_remote_addr; | |
254f91e2 | 92 | struct delayed_work rep_connect_worker; |
f58851e6 TT |
93 | }; |
94 | ||
95 | #define INIT_CQCOUNT(ep) atomic_set(&(ep)->rep_cqcount, (ep)->rep_cqinit) | |
96 | #define DECR_CQCOUNT(ep) atomic_sub_return(1, &(ep)->rep_cqcount) | |
97 | ||
124fa17d CL |
98 | /* Pre-allocate extra Work Requests for handling backward receives |
99 | * and sends. This is a fixed value because the Work Queues are | |
100 | * allocated when the forward channel is set up. | |
101 | */ | |
102 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) | |
103 | #define RPCRDMA_BACKWARD_WRS (8) | |
104 | #else | |
105 | #define RPCRDMA_BACKWARD_WRS (0) | |
106 | #endif | |
107 | ||
9128c3e7 CL |
108 | /* Registered buffer -- registered kmalloc'd memory for RDMA SEND/RECV |
109 | * | |
110 | * The below structure appears at the front of a large region of kmalloc'd | |
111 | * memory, which always starts on a good alignment boundary. | |
112 | */ | |
113 | ||
114 | struct rpcrdma_regbuf { | |
9128c3e7 CL |
115 | struct ib_sge rg_iov; |
116 | __be32 rg_base[0] __attribute__ ((aligned(256))); | |
117 | }; | |
118 | ||
119 | static inline u64 | |
120 | rdmab_addr(struct rpcrdma_regbuf *rb) | |
121 | { | |
122 | return rb->rg_iov.addr; | |
123 | } | |
124 | ||
125 | static inline u32 | |
126 | rdmab_length(struct rpcrdma_regbuf *rb) | |
127 | { | |
128 | return rb->rg_iov.length; | |
129 | } | |
130 | ||
131 | static inline u32 | |
132 | rdmab_lkey(struct rpcrdma_regbuf *rb) | |
133 | { | |
134 | return rb->rg_iov.lkey; | |
135 | } | |
136 | ||
137 | static inline struct rpcrdma_msg * | |
138 | rdmab_to_msg(struct rpcrdma_regbuf *rb) | |
139 | { | |
140 | return (struct rpcrdma_msg *)rb->rg_base; | |
141 | } | |
142 | ||
5d252f90 CL |
143 | #define RPCRDMA_DEF_GFP (GFP_NOIO | __GFP_NOWARN) |
144 | ||
94931746 CL |
145 | /* To ensure a transport can always make forward progress, |
146 | * the number of RDMA segments allowed in header chunk lists | |
147 | * is capped at 8. This prevents less-capable devices and | |
148 | * memory registrations from overrunning the Send buffer | |
149 | * while building chunk lists. | |
150 | * | |
151 | * Elements of the Read list take up more room than the | |
152 | * Write list or Reply chunk. 8 read segments means the Read | |
153 | * list (or Write list or Reply chunk) cannot consume more | |
154 | * than | |
155 | * | |
156 | * ((8 + 2) * read segment size) + 1 XDR words, or 244 bytes. | |
157 | * | |
158 | * And the fixed part of the header is another 24 bytes. | |
159 | * | |
160 | * The smallest inline threshold is 1024 bytes, ensuring that | |
161 | * at least 750 bytes are available for RPC messages. | |
162 | */ | |
163 | #define RPCRDMA_MAX_HDR_SEGS (8) | |
164 | ||
f58851e6 TT |
165 | /* |
166 | * struct rpcrdma_rep -- this structure encapsulates state required to recv | |
167 | * and complete a reply, asychronously. It needs several pieces of | |
168 | * state: | |
169 | * o recv buffer (posted to provider) | |
170 | * o ib_sge (also donated to provider) | |
171 | * o status of reply (length, success or not) | |
5ab81428 | 172 | * o bookkeeping state to get run by reply handler (list, etc) |
f58851e6 | 173 | * |
5ab81428 | 174 | * These are allocated during initialization, per-transport instance. |
f58851e6 TT |
175 | * |
176 | * N of these are associated with a transport instance, and stored in | |
177 | * struct rpcrdma_buffer. N is the max number of outstanding requests. | |
178 | */ | |
179 | ||
f58851e6 | 180 | struct rpcrdma_rep { |
552bf225 | 181 | struct ib_cqe rr_cqe; |
6b1184cd | 182 | unsigned int rr_len; |
89e0d112 | 183 | struct ib_device *rr_device; |
fed171b3 | 184 | struct rpcrdma_xprt *rr_rxprt; |
fe97b47c | 185 | struct work_struct rr_work; |
6b1184cd CL |
186 | struct list_head rr_list; |
187 | struct rpcrdma_regbuf *rr_rdmabuf; | |
f58851e6 TT |
188 | }; |
189 | ||
b0e178a2 CL |
190 | #define RPCRDMA_BAD_LEN (~0U) |
191 | ||
0dbb4108 CL |
192 | /* |
193 | * struct rpcrdma_mw - external memory region metadata | |
194 | * | |
195 | * An external memory region is any buffer or page that is registered | |
196 | * on the fly (ie, not pre-registered). | |
197 | * | |
3111d72c | 198 | * Each rpcrdma_buffer has a list of free MWs anchored in rb_mws. During |
0dbb4108 CL |
199 | * call_allocate, rpcrdma_buffer_get() assigns one to each segment in |
200 | * an rpcrdma_req. Then rpcrdma_register_external() grabs these to keep | |
201 | * track of registration metadata while each RPC is pending. | |
202 | * rpcrdma_deregister_external() uses this metadata to unmap and | |
203 | * release these resources when an RPC is complete. | |
204 | */ | |
205 | enum rpcrdma_frmr_state { | |
206 | FRMR_IS_INVALID, /* ready to be used */ | |
207 | FRMR_IS_VALID, /* in use */ | |
9f9d802a | 208 | FRMR_IS_STALE, /* failed completion */ |
0dbb4108 CL |
209 | }; |
210 | ||
211 | struct rpcrdma_frmr { | |
0dbb4108 | 212 | struct ib_mr *fr_mr; |
2fa8f88d | 213 | struct ib_cqe fr_cqe; |
0dbb4108 | 214 | enum rpcrdma_frmr_state fr_state; |
2fa8f88d | 215 | struct completion fr_linv_done; |
3cf4e169 CL |
216 | union { |
217 | struct ib_reg_wr fr_regwr; | |
218 | struct ib_send_wr fr_invwr; | |
219 | }; | |
0dbb4108 CL |
220 | }; |
221 | ||
acb9da7a | 222 | struct rpcrdma_fmr { |
88975ebe CL |
223 | struct ib_fmr *fm_mr; |
224 | u64 *fm_physaddrs; | |
0dbb4108 CL |
225 | }; |
226 | ||
227 | struct rpcrdma_mw { | |
564471d2 CL |
228 | struct list_head mw_list; |
229 | struct scatterlist *mw_sg; | |
230 | int mw_nents; | |
231 | enum dma_data_direction mw_dir; | |
0dbb4108 | 232 | union { |
acb9da7a | 233 | struct rpcrdma_fmr fmr; |
0dbb4108 | 234 | struct rpcrdma_frmr frmr; |
c882a655 | 235 | }; |
766656b0 | 236 | struct rpcrdma_xprt *mw_xprt; |
9d6b0409 CL |
237 | u32 mw_handle; |
238 | u32 mw_length; | |
239 | u64 mw_offset; | |
3111d72c | 240 | struct list_head mw_all; |
0dbb4108 CL |
241 | }; |
242 | ||
f58851e6 TT |
243 | /* |
244 | * struct rpcrdma_req -- structure central to the request/reply sequence. | |
245 | * | |
246 | * N of these are associated with a transport instance, and stored in | |
247 | * struct rpcrdma_buffer. N is the max number of outstanding requests. | |
248 | * | |
249 | * It includes pre-registered buffer memory for send AND recv. | |
250 | * The recv buffer, however, is not owned by this structure, and | |
251 | * is "donated" to the hardware when a recv is posted. When a | |
252 | * reply is handled, the recv buffer used is given back to the | |
253 | * struct rpcrdma_req associated with the request. | |
254 | * | |
255 | * In addition to the basic memory, this structure includes an array | |
256 | * of iovs for send operations. The reason is that the iovs passed to | |
257 | * ib_post_{send,recv} must not be modified until the work request | |
258 | * completes. | |
f58851e6 TT |
259 | */ |
260 | ||
5ab81428 CL |
261 | /* Maximum number of page-sized "segments" per chunk list to be |
262 | * registered or invalidated. Must handle a Reply chunk: | |
263 | */ | |
264 | enum { | |
265 | RPCRDMA_MAX_IOV_SEGS = 3, | |
266 | RPCRDMA_MAX_DATA_SEGS = ((1 * 1024 * 1024) / PAGE_SIZE) + 1, | |
267 | RPCRDMA_MAX_SEGS = RPCRDMA_MAX_DATA_SEGS + | |
268 | RPCRDMA_MAX_IOV_SEGS, | |
269 | }; | |
270 | ||
f58851e6 | 271 | struct rpcrdma_mr_seg { /* chunk descriptors */ |
f58851e6 | 272 | u32 mr_len; /* length of chunk or segment */ |
f58851e6 TT |
273 | struct page *mr_page; /* owning page, if any */ |
274 | char *mr_offset; /* kva if no page, else offset */ | |
275 | }; | |
276 | ||
b3221d6a CL |
277 | #define RPCRDMA_MAX_IOVS (2) |
278 | ||
5ab81428 | 279 | struct rpcrdma_buffer; |
f58851e6 | 280 | struct rpcrdma_req { |
1e465fd4 | 281 | struct list_head rl_free; |
b3221d6a | 282 | unsigned int rl_niovs; |
b3221d6a CL |
283 | unsigned int rl_connect_cookie; |
284 | struct rpcrdma_buffer *rl_buffer; | |
f58851e6 | 285 | struct rpcrdma_rep *rl_reply;/* holder for reply buffer */ |
b3221d6a | 286 | struct ib_sge rl_send_iov[RPCRDMA_MAX_IOVS]; |
9c40c49f CL |
287 | struct rpcrdma_regbuf *rl_rdmabuf; /* xprt header */ |
288 | struct rpcrdma_regbuf *rl_sendbuf; /* rq_snd_buf */ | |
289 | struct rpcrdma_regbuf *rl_recvbuf; /* rq_rcv_buf */ | |
f531a5db | 290 | |
2fa8f88d | 291 | struct ib_cqe rl_cqe; |
f531a5db CL |
292 | struct list_head rl_all; |
293 | bool rl_backchannel; | |
5ab81428 CL |
294 | |
295 | struct list_head rl_registered; /* registered segments */ | |
296 | struct rpcrdma_mr_seg rl_segments[RPCRDMA_MAX_SEGS]; | |
f58851e6 | 297 | }; |
0ca77dc3 | 298 | |
5a6d1db4 CL |
299 | static inline void |
300 | rpcrdma_set_xprtdata(struct rpc_rqst *rqst, struct rpcrdma_req *req) | |
301 | { | |
302 | rqst->rq_xprtdata = req; | |
303 | } | |
304 | ||
0ca77dc3 CL |
305 | static inline struct rpcrdma_req * |
306 | rpcr_to_rdmar(struct rpc_rqst *rqst) | |
307 | { | |
5a6d1db4 | 308 | return rqst->rq_xprtdata; |
0ca77dc3 | 309 | } |
f58851e6 TT |
310 | |
311 | /* | |
312 | * struct rpcrdma_buffer -- holds list/queue of pre-registered memory for | |
313 | * inline requests/replies, and client/server credits. | |
314 | * | |
315 | * One of these is associated with a transport instance | |
316 | */ | |
317 | struct rpcrdma_buffer { | |
58d1dcf5 CL |
318 | spinlock_t rb_mwlock; /* protect rb_mws list */ |
319 | struct list_head rb_mws; | |
320 | struct list_head rb_all; | |
321 | char *rb_pool; | |
322 | ||
1e465fd4 | 323 | spinlock_t rb_lock; /* protect buf lists */ |
05c97466 | 324 | int rb_send_count, rb_recv_count; |
1e465fd4 CL |
325 | struct list_head rb_send_bufs; |
326 | struct list_head rb_recv_bufs; | |
58d1dcf5 | 327 | u32 rb_max_requests; |
23826c7a | 328 | atomic_t rb_credits; /* most recent credit grant */ |
f531a5db CL |
329 | |
330 | u32 rb_bc_srv_max_requests; | |
331 | spinlock_t rb_reqslock; /* protect rb_allreqs */ | |
332 | struct list_head rb_allreqs; | |
5d252f90 CL |
333 | |
334 | u32 rb_bc_max_requests; | |
505bbe64 CL |
335 | |
336 | spinlock_t rb_recovery_lock; /* protect rb_stale_mrs */ | |
337 | struct list_head rb_stale_mrs; | |
338 | struct delayed_work rb_recovery_worker; | |
e2ac236c | 339 | struct delayed_work rb_refresh_worker; |
f58851e6 TT |
340 | }; |
341 | #define rdmab_to_ia(b) (&container_of((b), struct rpcrdma_xprt, rx_buf)->rx_ia) | |
342 | ||
343 | /* | |
344 | * Internal structure for transport instance creation. This | |
345 | * exists primarily for modularity. | |
346 | * | |
347 | * This data should be set with mount options | |
348 | */ | |
349 | struct rpcrdma_create_data_internal { | |
350 | struct sockaddr_storage addr; /* RDMA server address */ | |
351 | unsigned int max_requests; /* max requests (slots) in flight */ | |
352 | unsigned int rsize; /* mount rsize - max read hdr+data */ | |
353 | unsigned int wsize; /* mount wsize - max write hdr+data */ | |
354 | unsigned int inline_rsize; /* max non-rdma read data payload */ | |
355 | unsigned int inline_wsize; /* max non-rdma write data payload */ | |
356 | unsigned int padding; /* non-rdma write header padding */ | |
357 | }; | |
358 | ||
f58851e6 TT |
359 | /* |
360 | * Statistics for RPCRDMA | |
361 | */ | |
362 | struct rpcrdma_stats { | |
363 | unsigned long read_chunk_count; | |
364 | unsigned long write_chunk_count; | |
365 | unsigned long reply_chunk_count; | |
366 | ||
367 | unsigned long long total_rdma_request; | |
368 | unsigned long long total_rdma_reply; | |
369 | ||
370 | unsigned long long pullup_copy_count; | |
371 | unsigned long long fixup_copy_count; | |
372 | unsigned long hardway_register_count; | |
373 | unsigned long failed_marshal_count; | |
374 | unsigned long bad_reply_count; | |
860477d1 | 375 | unsigned long nomsg_call_count; |
63cae470 | 376 | unsigned long bcall_count; |
505bbe64 CL |
377 | unsigned long mrs_recovered; |
378 | unsigned long mrs_orphaned; | |
e2ac236c | 379 | unsigned long mrs_allocated; |
f58851e6 TT |
380 | }; |
381 | ||
a0ce85f5 CL |
382 | /* |
383 | * Per-registration mode operations | |
384 | */ | |
1c9351ee | 385 | struct rpcrdma_xprt; |
a0ce85f5 | 386 | struct rpcrdma_memreg_ops { |
9c1b4d77 | 387 | int (*ro_map)(struct rpcrdma_xprt *, |
9d6b0409 CL |
388 | struct rpcrdma_mr_seg *, int, bool, |
389 | struct rpcrdma_mw **); | |
32d0ceec CL |
390 | void (*ro_unmap_sync)(struct rpcrdma_xprt *, |
391 | struct rpcrdma_req *); | |
ead3f26e CL |
392 | void (*ro_unmap_safe)(struct rpcrdma_xprt *, |
393 | struct rpcrdma_req *, bool); | |
505bbe64 | 394 | void (*ro_recover_mr)(struct rpcrdma_mw *); |
3968cb58 CL |
395 | int (*ro_open)(struct rpcrdma_ia *, |
396 | struct rpcrdma_ep *, | |
397 | struct rpcrdma_create_data_internal *); | |
1c9351ee | 398 | size_t (*ro_maxpages)(struct rpcrdma_xprt *); |
e2ac236c CL |
399 | int (*ro_init_mr)(struct rpcrdma_ia *, |
400 | struct rpcrdma_mw *); | |
401 | void (*ro_release_mr)(struct rpcrdma_mw *); | |
a0ce85f5 CL |
402 | const char *ro_displayname; |
403 | }; | |
404 | ||
405 | extern const struct rpcrdma_memreg_ops rpcrdma_fmr_memreg_ops; | |
406 | extern const struct rpcrdma_memreg_ops rpcrdma_frwr_memreg_ops; | |
a0ce85f5 | 407 | |
f58851e6 TT |
408 | /* |
409 | * RPCRDMA transport -- encapsulates the structures above for | |
410 | * integration with RPC. | |
411 | * | |
412 | * The contained structures are embedded, not pointers, | |
413 | * for convenience. This structure need not be visible externally. | |
414 | * | |
415 | * It is allocated and initialized during mount, and released | |
416 | * during unmount. | |
417 | */ | |
418 | struct rpcrdma_xprt { | |
5abefb86 | 419 | struct rpc_xprt rx_xprt; |
f58851e6 TT |
420 | struct rpcrdma_ia rx_ia; |
421 | struct rpcrdma_ep rx_ep; | |
422 | struct rpcrdma_buffer rx_buf; | |
423 | struct rpcrdma_create_data_internal rx_data; | |
5abefb86 | 424 | struct delayed_work rx_connect_worker; |
f58851e6 TT |
425 | struct rpcrdma_stats rx_stats; |
426 | }; | |
427 | ||
5abefb86 | 428 | #define rpcx_to_rdmax(x) container_of(x, struct rpcrdma_xprt, rx_xprt) |
f58851e6 TT |
429 | #define rpcx_to_rdmad(x) (rpcx_to_rdmax(x)->rx_data) |
430 | ||
9191ca3b TT |
431 | /* Setting this to 0 ensures interoperability with early servers. |
432 | * Setting this to 1 enhances certain unaligned read/write performance. | |
433 | * Default is 0, see sysctl entry and rpc_rdma.c rpcrdma_convert_iovs() */ | |
434 | extern int xprt_rdma_pad_optimize; | |
435 | ||
f58851e6 TT |
436 | /* |
437 | * Interface Adapter calls - xprtrdma/verbs.c | |
438 | */ | |
439 | int rpcrdma_ia_open(struct rpcrdma_xprt *, struct sockaddr *, int); | |
440 | void rpcrdma_ia_close(struct rpcrdma_ia *); | |
b54054ca CL |
441 | bool frwr_is_supported(struct rpcrdma_ia *); |
442 | bool fmr_is_supported(struct rpcrdma_ia *); | |
f58851e6 TT |
443 | |
444 | /* | |
445 | * Endpoint calls - xprtrdma/verbs.c | |
446 | */ | |
447 | int rpcrdma_ep_create(struct rpcrdma_ep *, struct rpcrdma_ia *, | |
448 | struct rpcrdma_create_data_internal *); | |
7f1d5419 | 449 | void rpcrdma_ep_destroy(struct rpcrdma_ep *, struct rpcrdma_ia *); |
f58851e6 | 450 | int rpcrdma_ep_connect(struct rpcrdma_ep *, struct rpcrdma_ia *); |
282191cb | 451 | void rpcrdma_ep_disconnect(struct rpcrdma_ep *, struct rpcrdma_ia *); |
f58851e6 TT |
452 | |
453 | int rpcrdma_ep_post(struct rpcrdma_ia *, struct rpcrdma_ep *, | |
454 | struct rpcrdma_req *); | |
455 | int rpcrdma_ep_post_recv(struct rpcrdma_ia *, struct rpcrdma_ep *, | |
456 | struct rpcrdma_rep *); | |
457 | ||
458 | /* | |
459 | * Buffer calls - xprtrdma/verbs.c | |
460 | */ | |
f531a5db CL |
461 | struct rpcrdma_req *rpcrdma_create_req(struct rpcrdma_xprt *); |
462 | struct rpcrdma_rep *rpcrdma_create_rep(struct rpcrdma_xprt *); | |
463 | void rpcrdma_destroy_req(struct rpcrdma_ia *, struct rpcrdma_req *); | |
ac920d04 | 464 | int rpcrdma_buffer_create(struct rpcrdma_xprt *); |
f58851e6 TT |
465 | void rpcrdma_buffer_destroy(struct rpcrdma_buffer *); |
466 | ||
346aa66b CL |
467 | struct rpcrdma_mw *rpcrdma_get_mw(struct rpcrdma_xprt *); |
468 | void rpcrdma_put_mw(struct rpcrdma_xprt *, struct rpcrdma_mw *); | |
f58851e6 TT |
469 | struct rpcrdma_req *rpcrdma_buffer_get(struct rpcrdma_buffer *); |
470 | void rpcrdma_buffer_put(struct rpcrdma_req *); | |
471 | void rpcrdma_recv_buffer_get(struct rpcrdma_req *); | |
472 | void rpcrdma_recv_buffer_put(struct rpcrdma_rep *); | |
473 | ||
505bbe64 CL |
474 | void rpcrdma_defer_mr_recovery(struct rpcrdma_mw *); |
475 | ||
9128c3e7 CL |
476 | struct rpcrdma_regbuf *rpcrdma_alloc_regbuf(struct rpcrdma_ia *, |
477 | size_t, gfp_t); | |
478 | void rpcrdma_free_regbuf(struct rpcrdma_ia *, | |
479 | struct rpcrdma_regbuf *); | |
480 | ||
f531a5db | 481 | int rpcrdma_ep_post_extra_recv(struct rpcrdma_xprt *, unsigned int); |
d654788e | 482 | |
fe97b47c CL |
483 | int rpcrdma_alloc_wq(void); |
484 | void rpcrdma_destroy_wq(void); | |
485 | ||
d654788e CL |
486 | /* |
487 | * Wrappers for chunk registration, shared by read/write chunk code. | |
488 | */ | |
489 | ||
d654788e CL |
490 | static inline enum dma_data_direction |
491 | rpcrdma_data_dir(bool writing) | |
492 | { | |
493 | return writing ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
494 | } | |
495 | ||
f58851e6 TT |
496 | /* |
497 | * RPC/RDMA connection management calls - xprtrdma/rpc_rdma.c | |
498 | */ | |
254f91e2 | 499 | void rpcrdma_connect_worker(struct work_struct *); |
f58851e6 TT |
500 | void rpcrdma_conn_func(struct rpcrdma_ep *); |
501 | void rpcrdma_reply_handler(struct rpcrdma_rep *); | |
502 | ||
503 | /* | |
504 | * RPC/RDMA protocol calls - xprtrdma/rpc_rdma.c | |
505 | */ | |
506 | int rpcrdma_marshal_req(struct rpc_rqst *); | |
302d3deb CL |
507 | void rpcrdma_set_max_header_sizes(struct rpcrdma_ia *, |
508 | struct rpcrdma_create_data_internal *, | |
509 | unsigned int); | |
f58851e6 | 510 | |
ffe1f0df CL |
511 | /* RPC/RDMA module init - xprtrdma/transport.c |
512 | */ | |
5d252f90 CL |
513 | extern unsigned int xprt_rdma_max_inline_read; |
514 | void xprt_rdma_format_addresses(struct rpc_xprt *xprt, struct sockaddr *sap); | |
515 | void xprt_rdma_free_addresses(struct rpc_xprt *xprt); | |
516 | void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq); | |
ffe1f0df CL |
517 | int xprt_rdma_init(void); |
518 | void xprt_rdma_cleanup(void); | |
519 | ||
f531a5db CL |
520 | /* Backchannel calls - xprtrdma/backchannel.c |
521 | */ | |
522 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) | |
523 | int xprt_rdma_bc_setup(struct rpc_xprt *, unsigned int); | |
76566773 | 524 | int xprt_rdma_bc_up(struct svc_serv *, struct net *); |
6b26cc8c | 525 | size_t xprt_rdma_bc_maxpayload(struct rpc_xprt *); |
f531a5db | 526 | int rpcrdma_bc_post_recv(struct rpcrdma_xprt *, unsigned int); |
63cae470 | 527 | void rpcrdma_bc_receive_call(struct rpcrdma_xprt *, struct rpcrdma_rep *); |
83128a60 | 528 | int rpcrdma_bc_marshal_reply(struct rpc_rqst *); |
f531a5db CL |
529 | void xprt_rdma_bc_free_rqst(struct rpc_rqst *); |
530 | void xprt_rdma_bc_destroy(struct rpc_xprt *, unsigned int); | |
531 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ | |
532 | ||
5d252f90 | 533 | extern struct xprt_class xprt_rdma_bc; |
cec56c8f | 534 | |
f58851e6 | 535 | #endif /* _LINUX_SUNRPC_XPRT_RDMA_H */ |