Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005-2006 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 | * Author: Tom Tucker <tom@opengridcomputing.com> |
| 40 | */ |
| 41 | |
| 42 | #ifndef SVC_RDMA_H |
| 43 | #define SVC_RDMA_H |
| 44 | #include <linux/sunrpc/xdr.h> |
| 45 | #include <linux/sunrpc/svcsock.h> |
| 46 | #include <linux/sunrpc/rpc_rdma.h> |
| 47 | #include <rdma/ib_verbs.h> |
| 48 | #include <rdma/rdma_cm.h> |
| 49 | #define SVCRDMA_DEBUG |
| 50 | |
| 51 | /* RPC/RDMA parameters and stats */ |
| 52 | extern unsigned int svcrdma_ord; |
| 53 | extern unsigned int svcrdma_max_requests; |
Chuck Lever | 03fe993 | 2016-01-07 14:50:02 -0500 | [diff] [blame] | 54 | extern unsigned int svcrdma_max_bc_requests; |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 55 | extern unsigned int svcrdma_max_req_size; |
| 56 | |
| 57 | extern atomic_t rdma_stat_recv; |
| 58 | extern atomic_t rdma_stat_read; |
| 59 | extern atomic_t rdma_stat_write; |
| 60 | extern atomic_t rdma_stat_sq_starve; |
| 61 | extern atomic_t rdma_stat_rq_starve; |
| 62 | extern atomic_t rdma_stat_rq_poll; |
| 63 | extern atomic_t rdma_stat_rq_prod; |
| 64 | extern atomic_t rdma_stat_sq_poll; |
| 65 | extern atomic_t rdma_stat_sq_prod; |
| 66 | |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 67 | /* |
| 68 | * Contexts are built when an RDMA request is created and are a |
| 69 | * record of the resources that can be recovered when the request |
| 70 | * completes. |
| 71 | */ |
| 72 | struct svc_rdma_op_ctxt { |
Chuck Lever | cc886c9 | 2016-01-07 14:49:12 -0500 | [diff] [blame] | 73 | struct list_head free; |
Tom Tucker | 02e7452 | 2008-04-30 19:50:56 -0500 | [diff] [blame] | 74 | struct svc_rdma_op_ctxt *read_hdr; |
Tom Tucker | 0d3ebb9 | 2008-09-30 13:06:13 -0500 | [diff] [blame] | 75 | struct svc_rdma_fastreg_mr *frmr; |
Tom Tucker | f820c57 | 2008-05-27 17:03:14 -0500 | [diff] [blame] | 76 | int hdr_count; |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 77 | struct xdr_buf arg; |
Chuck Lever | 8bd5ba8 | 2016-03-01 13:07:13 -0500 | [diff] [blame] | 78 | struct ib_cqe cqe; |
Chuck Lever | be99bb1 | 2016-03-01 13:07:22 -0500 | [diff] [blame] | 79 | struct ib_cqe reg_cqe; |
| 80 | struct ib_cqe inv_cqe; |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 81 | struct list_head dto_q; |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 82 | enum ib_wc_status wc_status; |
| 83 | u32 byte_len; |
Chuck Lever | 0b056c2 | 2015-01-13 11:03:37 -0500 | [diff] [blame] | 84 | u32 position; |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 85 | struct svcxprt_rdma *xprt; |
| 86 | unsigned long flags; |
| 87 | enum dma_data_direction direction; |
| 88 | int count; |
Chuck Lever | cace564 | 2016-09-13 10:52:50 -0400 | [diff] [blame] | 89 | unsigned int mapped_sges; |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 90 | struct ib_sge sge[RPCSVC_MAXPAGES]; |
| 91 | struct page *pages[RPCSVC_MAXPAGES]; |
| 92 | }; |
| 93 | |
Tom Tucker | ab96ddd | 2008-05-28 13:54:04 -0500 | [diff] [blame] | 94 | /* |
| 95 | * NFS_ requests are mapped on the client side by the chunk lists in |
| 96 | * the RPCRDMA header. During the fetching of the RPC from the client |
| 97 | * and the writing of the reply to the client, the memory in the |
| 98 | * client and the memory in the server must be mapped as contiguous |
| 99 | * vaddr/len for access by the hardware. These data strucures keep |
| 100 | * these mappings. |
| 101 | * |
| 102 | * For an RDMA_WRITE, the 'sge' maps the RPC REPLY. For RDMA_READ, the |
| 103 | * 'sge' in the svc_rdma_req_map maps the server side RPC reply and the |
| 104 | * 'ch' field maps the read-list of the RPCRDMA header to the 'sge' |
| 105 | * mapping of the reply. |
| 106 | */ |
| 107 | struct svc_rdma_chunk_sge { |
| 108 | int start; /* sge no for this chunk */ |
| 109 | int count; /* sge count for this chunk */ |
| 110 | }; |
Tom Tucker | 0d3ebb9 | 2008-09-30 13:06:13 -0500 | [diff] [blame] | 111 | struct svc_rdma_fastreg_mr { |
| 112 | struct ib_mr *mr; |
Sagi Grimberg | 412a15c | 2015-10-13 19:11:36 +0300 | [diff] [blame] | 113 | struct scatterlist *sg; |
| 114 | int sg_nents; |
Tom Tucker | 0d3ebb9 | 2008-09-30 13:06:13 -0500 | [diff] [blame] | 115 | unsigned long access_flags; |
Tom Tucker | 0d3ebb9 | 2008-09-30 13:06:13 -0500 | [diff] [blame] | 116 | enum dma_data_direction direction; |
| 117 | struct list_head frmr_list; |
| 118 | }; |
Tom Tucker | ab96ddd | 2008-05-28 13:54:04 -0500 | [diff] [blame] | 119 | struct svc_rdma_req_map { |
Chuck Lever | 2fe81b2 | 2016-01-07 14:49:20 -0500 | [diff] [blame] | 120 | struct list_head free; |
Tom Tucker | ab96ddd | 2008-05-28 13:54:04 -0500 | [diff] [blame] | 121 | unsigned long count; |
| 122 | union { |
| 123 | struct kvec sge[RPCSVC_MAXPAGES]; |
| 124 | struct svc_rdma_chunk_sge ch[RPCSVC_MAXPAGES]; |
Steve Wise | 0bf4828 | 2014-05-28 15:12:01 -0500 | [diff] [blame] | 125 | unsigned long lkey[RPCSVC_MAXPAGES]; |
Tom Tucker | ab96ddd | 2008-05-28 13:54:04 -0500 | [diff] [blame] | 126 | }; |
| 127 | }; |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 128 | #define RDMACTXT_F_LAST_CTXT 2 |
| 129 | |
Tom Tucker | 0d3ebb9 | 2008-09-30 13:06:13 -0500 | [diff] [blame] | 130 | #define SVCRDMA_DEVCAP_FAST_REG 1 /* fast mr registration */ |
| 131 | #define SVCRDMA_DEVCAP_READ_W_INV 2 /* read w/ invalidate */ |
| 132 | |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 133 | struct svcxprt_rdma { |
| 134 | struct svc_xprt sc_xprt; /* SVC transport structure */ |
| 135 | struct rdma_cm_id *sc_cm_id; /* RDMA connection id */ |
| 136 | struct list_head sc_accept_q; /* Conn. waiting accept */ |
| 137 | int sc_ord; /* RDMA read limit */ |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 138 | int sc_max_sge; |
Steve Wise | bc3fe2e | 2015-07-27 18:10:12 -0500 | [diff] [blame] | 139 | int sc_max_sge_rd; /* max sge for read target */ |
Chuck Lever | 25d55296 | 2016-09-13 10:53:23 -0400 | [diff] [blame] | 140 | bool sc_snd_w_inv; /* OK to use Send With Invalidate */ |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 141 | |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 142 | atomic_t sc_sq_count; /* Number of SQ WR on queue */ |
Chuck Lever | 03fe993 | 2016-01-07 14:50:02 -0500 | [diff] [blame] | 143 | unsigned int sc_sq_depth; /* Depth of SQ */ |
| 144 | unsigned int sc_rq_depth; /* Depth of RQ */ |
| 145 | u32 sc_max_requests; /* Forward credits */ |
| 146 | u32 sc_max_bc_requests;/* Backward credits */ |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 147 | int sc_max_req_size; /* Size of each RQ WR buf */ |
| 148 | |
| 149 | struct ib_pd *sc_pd; |
| 150 | |
Tom Tucker | 87295b6 | 2008-05-28 13:17:44 -0500 | [diff] [blame] | 151 | atomic_t sc_dma_used; |
Chuck Lever | cc886c9 | 2016-01-07 14:49:12 -0500 | [diff] [blame] | 152 | spinlock_t sc_ctxt_lock; |
| 153 | struct list_head sc_ctxts; |
| 154 | int sc_ctxt_used; |
Chuck Lever | 2fe81b2 | 2016-01-07 14:49:20 -0500 | [diff] [blame] | 155 | spinlock_t sc_map_lock; |
| 156 | struct list_head sc_maps; |
Chuck Lever | cc886c9 | 2016-01-07 14:49:12 -0500 | [diff] [blame] | 157 | |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 158 | struct list_head sc_rq_dto_q; |
| 159 | spinlock_t sc_rq_dto_lock; |
| 160 | struct ib_qp *sc_qp; |
| 161 | struct ib_cq *sc_rq_cq; |
| 162 | struct ib_cq *sc_sq_cq; |
Chuck Lever | e545241 | 2015-01-13 11:03:20 -0500 | [diff] [blame] | 163 | int (*sc_reader)(struct svcxprt_rdma *, |
| 164 | struct svc_rqst *, |
| 165 | struct svc_rdma_op_ctxt *, |
| 166 | int *, u32 *, u32, u32, u64, bool); |
Tom Tucker | 0d3ebb9 | 2008-09-30 13:06:13 -0500 | [diff] [blame] | 167 | u32 sc_dev_caps; /* distilled device caps */ |
Tom Tucker | 0d3ebb9 | 2008-09-30 13:06:13 -0500 | [diff] [blame] | 168 | unsigned int sc_frmr_pg_list_len; |
| 169 | struct list_head sc_frmr_q; |
| 170 | spinlock_t sc_frmr_q_lock; |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 171 | |
| 172 | spinlock_t sc_lock; /* transport lock */ |
| 173 | |
| 174 | wait_queue_head_t sc_send_wait; /* SQ exhaustion waitlist */ |
| 175 | unsigned long sc_flags; |
| 176 | struct list_head sc_dto_q; /* DTO tasklet I/O pending Q */ |
| 177 | struct list_head sc_read_complete_q; |
Tom Tucker | 8da91ea | 2008-04-30 22:00:46 -0500 | [diff] [blame] | 178 | struct work_struct sc_work; |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 179 | }; |
| 180 | /* sc_flags */ |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 181 | #define RDMAXPRT_CONN_PENDING 3 |
| 182 | |
| 183 | #define RPCRDMA_LISTEN_BACKLOG 10 |
| 184 | /* The default ORD value is based on two outstanding full-size writes with a |
| 185 | * page size of 4k, or 32k * 2 ops / 4k = 16 outstanding RDMA_READ. */ |
| 186 | #define RPCRDMA_ORD (64/4) |
| 187 | #define RPCRDMA_SQ_DEPTH_MULT 8 |
Chuck Lever | d9bb5a4 | 2014-07-22 17:48:04 -0400 | [diff] [blame] | 188 | #define RPCRDMA_MAX_REQUESTS 32 |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 189 | #define RPCRDMA_MAX_REQ_SIZE 4096 |
| 190 | |
Chuck Lever | 03fe993 | 2016-01-07 14:50:02 -0500 | [diff] [blame] | 191 | /* Typical ULP usage of BC requests is NFSv4.1 backchannel. Our |
| 192 | * current NFSv4.1 implementation supports one backchannel slot. |
| 193 | */ |
| 194 | #define RPCRDMA_MAX_BC_REQUESTS 2 |
| 195 | |
Chuck Lever | cc9a903 | 2015-08-07 16:55:46 -0400 | [diff] [blame] | 196 | #define RPCSVC_MAXPAYLOAD_RDMA RPCSVC_MAXPAYLOAD |
| 197 | |
Chuck Lever | cace564 | 2016-09-13 10:52:50 -0400 | [diff] [blame] | 198 | /* Track DMA maps for this transport and context */ |
| 199 | static inline void svc_rdma_count_mappings(struct svcxprt_rdma *rdma, |
| 200 | struct svc_rdma_op_ctxt *ctxt) |
| 201 | { |
| 202 | ctxt->mapped_sges++; |
| 203 | atomic_inc(&rdma->sc_dma_used); |
| 204 | } |
| 205 | |
Chuck Lever | 5d252f9 | 2016-01-07 14:50:10 -0500 | [diff] [blame] | 206 | /* svc_rdma_backchannel.c */ |
| 207 | extern int svc_rdma_handle_bc_reply(struct rpc_xprt *xprt, |
| 208 | struct rpcrdma_msg *rmsgp, |
| 209 | struct xdr_buf *rcvbuf); |
| 210 | |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 211 | /* svc_rdma_marshal.c */ |
Chuck Lever | d9e4084 | 2016-05-04 10:53:47 -0400 | [diff] [blame] | 212 | extern int svc_rdma_xdr_decode_req(struct xdr_buf *); |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 213 | extern int svc_rdma_xdr_encode_error(struct svcxprt_rdma *, |
| 214 | struct rpcrdma_msg *, |
Chuck Lever | 30b7e24 | 2015-06-04 11:21:10 -0400 | [diff] [blame] | 215 | enum rpcrdma_errcode, __be32 *); |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 216 | extern void svc_rdma_xdr_encode_write_list(struct rpcrdma_msg *, int); |
| 217 | extern void svc_rdma_xdr_encode_reply_array(struct rpcrdma_write_array *, int); |
| 218 | extern void svc_rdma_xdr_encode_array_chunk(struct rpcrdma_write_array *, int, |
Dan Carpenter | 1fa9c44 | 2012-02-21 10:28:04 +0300 | [diff] [blame] | 219 | __be32, __be64, u32); |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 220 | extern void svc_rdma_xdr_encode_reply_header(struct svcxprt_rdma *, |
| 221 | struct rpcrdma_msg *, |
| 222 | struct rpcrdma_msg *, |
| 223 | enum rpcrdma_proc); |
| 224 | extern int svc_rdma_xdr_get_reply_hdr_len(struct rpcrdma_msg *); |
| 225 | |
| 226 | /* svc_rdma_recvfrom.c */ |
| 227 | extern int svc_rdma_recvfrom(struct svc_rqst *); |
Chuck Lever | e545241 | 2015-01-13 11:03:20 -0500 | [diff] [blame] | 228 | extern int rdma_read_chunk_lcl(struct svcxprt_rdma *, struct svc_rqst *, |
| 229 | struct svc_rdma_op_ctxt *, int *, u32 *, |
| 230 | u32, u32, u64, bool); |
| 231 | extern int rdma_read_chunk_frmr(struct svcxprt_rdma *, struct svc_rqst *, |
| 232 | struct svc_rdma_op_ctxt *, int *, u32 *, |
| 233 | u32, u32, u64, bool); |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 234 | |
| 235 | /* svc_rdma_sendto.c */ |
Chuck Lever | ba986c9 | 2016-01-07 14:49:53 -0500 | [diff] [blame] | 236 | extern int svc_rdma_map_xdr(struct svcxprt_rdma *, struct xdr_buf *, |
Chuck Lever | f6763c2 | 2016-03-01 13:05:54 -0500 | [diff] [blame] | 237 | struct svc_rdma_req_map *, bool); |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 238 | extern int svc_rdma_sendto(struct svc_rqst *); |
Chuck Lever | 10dc451 | 2015-07-09 16:45:28 -0400 | [diff] [blame] | 239 | extern struct rpcrdma_read_chunk * |
| 240 | svc_rdma_get_read_chunk(struct rpcrdma_msg *); |
Chuck Lever | a6081b8 | 2016-03-01 13:06:38 -0500 | [diff] [blame] | 241 | extern void svc_rdma_send_error(struct svcxprt_rdma *, struct rpcrdma_msg *, |
| 242 | int); |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 243 | |
| 244 | /* svc_rdma_transport.c */ |
Chuck Lever | be99bb1 | 2016-03-01 13:07:22 -0500 | [diff] [blame] | 245 | extern void svc_rdma_wc_send(struct ib_cq *, struct ib_wc *); |
| 246 | extern void svc_rdma_wc_write(struct ib_cq *, struct ib_wc *); |
| 247 | extern void svc_rdma_wc_reg(struct ib_cq *, struct ib_wc *); |
| 248 | extern void svc_rdma_wc_read(struct ib_cq *, struct ib_wc *); |
| 249 | extern void svc_rdma_wc_inv(struct ib_cq *, struct ib_wc *); |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 250 | extern int svc_rdma_send(struct svcxprt_rdma *, struct ib_send_wr *); |
Chuck Lever | 39b09a1 | 2016-01-07 14:49:37 -0500 | [diff] [blame] | 251 | extern int svc_rdma_post_recv(struct svcxprt_rdma *, gfp_t); |
Chuck Lever | bf36387 | 2016-03-01 13:06:20 -0500 | [diff] [blame] | 252 | extern int svc_rdma_repost_recv(struct svcxprt_rdma *, gfp_t); |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 253 | extern int svc_rdma_create_listen(struct svc_serv *, int, struct sockaddr *); |
| 254 | extern struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *); |
| 255 | extern void svc_rdma_put_context(struct svc_rdma_op_ctxt *, int); |
Tom Tucker | 146b6df | 2008-08-12 15:12:10 -0500 | [diff] [blame] | 256 | extern void svc_rdma_unmap_dma(struct svc_rdma_op_ctxt *ctxt); |
Chuck Lever | 2fe81b2 | 2016-01-07 14:49:20 -0500 | [diff] [blame] | 257 | extern struct svc_rdma_req_map *svc_rdma_get_req_map(struct svcxprt_rdma *); |
| 258 | extern void svc_rdma_put_req_map(struct svcxprt_rdma *, |
| 259 | struct svc_rdma_req_map *); |
Tom Tucker | 64be8608 | 2008-10-06 14:45:18 -0500 | [diff] [blame] | 260 | extern struct svc_rdma_fastreg_mr *svc_rdma_get_frmr(struct svcxprt_rdma *); |
| 261 | extern void svc_rdma_put_frmr(struct svcxprt_rdma *, |
| 262 | struct svc_rdma_fastreg_mr *); |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 263 | extern void svc_sq_reap(struct svcxprt_rdma *); |
| 264 | extern void svc_rq_reap(struct svcxprt_rdma *); |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 265 | extern void svc_rdma_prep_reply_hdr(struct svc_rqst *); |
| 266 | |
Chuck Lever | 9468431 | 2015-10-24 17:28:16 -0400 | [diff] [blame] | 267 | extern struct svc_xprt_class svc_rdma_class; |
| 268 | #ifdef CONFIG_SUNRPC_BACKCHANNEL |
| 269 | extern struct svc_xprt_class svc_rdma_bc_class; |
| 270 | #endif |
| 271 | |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 272 | /* svc_rdma.c */ |
Chuck Lever | 71810ef | 2016-01-07 14:49:28 -0500 | [diff] [blame] | 273 | extern struct workqueue_struct *svc_rdma_wq; |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 274 | extern int svc_rdma_init(void); |
| 275 | extern void svc_rdma_cleanup(void); |
| 276 | |
Tom Tucker | d21b05f | 2007-12-12 16:13:17 -0600 | [diff] [blame] | 277 | #endif |