[deliverable/linux.git] / include / linux / sunrpc / svc_rdma.h

/*
 * Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the BSD-type
 * license below:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *      Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *      Redistributions in binary form must reproduce the above
 *      copyright notice, this list of conditions and the following
 *      disclaimer in the documentation and/or other materials provided
 *      with the distribution.
 *
 *      Neither the name of the Network Appliance, Inc. nor the names of
 *      its contributors may be used to endorse or promote products
 *      derived from this software without specific prior written
 *      permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Author: Tom Tucker <tom@opengridcomputing.com>
 */

#ifndef SVC_RDMA_H
#define SVC_RDMA_H
#include <linux/sunrpc/xdr.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/sunrpc/rpc_rdma.h>
#include <rdma/ib_verbs.h>
#include <rdma/rdma_cm.h>
#define SVCRDMA_DEBUG

/* RPC/RDMA parameters and stats */
extern unsigned int svcrdma_ord;
extern unsigned int svcrdma_max_requests;
extern unsigned int svcrdma_max_bc_requests;
extern unsigned int svcrdma_max_req_size;

extern atomic_t rdma_stat_recv;
extern atomic_t rdma_stat_read;
extern atomic_t rdma_stat_write;
extern atomic_t rdma_stat_sq_starve;
extern atomic_t rdma_stat_rq_starve;
extern atomic_t rdma_stat_rq_poll;
extern atomic_t rdma_stat_rq_prod;
extern atomic_t rdma_stat_sq_poll;
extern atomic_t rdma_stat_sq_prod;

/*
 * Contexts are built when an RDMA request is created and are a
 * record of the resources that can be recovered when the request
 * completes.
 */
struct svc_rdma_op_ctxt {
	struct list_head free;
	struct svc_rdma_op_ctxt *read_hdr;
	struct svc_rdma_fastreg_mr *frmr;
	int hdr_count;
	struct xdr_buf arg;
	struct list_head dto_q;
	enum ib_wr_opcode wr_op;
	enum ib_wc_status wc_status;
	u32 byte_len;
	u32 position;
	struct svcxprt_rdma *xprt;
	unsigned long flags;
	enum dma_data_direction direction;
	int count;
	struct ib_sge sge[RPCSVC_MAXPAGES];
	struct page *pages[RPCSVC_MAXPAGES];
};

/*
 * NFS_ requests are mapped on the client side by the chunk lists in
 * the RPCRDMA header. During the fetching of the RPC from the client
 * and the writing of the reply to the client, the memory in the
 * client and the memory in the server must be mapped as contiguous
 * vaddr/len for access by the hardware. These data strucures keep
 * these mappings.
 *
 * For an RDMA_WRITE, the 'sge' maps the RPC REPLY. For RDMA_READ, the
 * 'sge' in the svc_rdma_req_map maps the server side RPC reply and the
 * 'ch' field maps the read-list of the RPCRDMA header to the 'sge'
 * mapping of the reply.
 */
struct svc_rdma_chunk_sge {
	int start;		/* sge no for this chunk */
	int count;		/* sge count for this chunk */
};
struct svc_rdma_fastreg_mr {
	struct ib_mr *mr;
	struct scatterlist *sg;
	int sg_nents;
	unsigned long access_flags;
	enum dma_data_direction direction;
	struct list_head frmr_list;
};
struct svc_rdma_req_map {
	struct list_head free;
	unsigned long count;
	union {
		struct kvec sge[RPCSVC_MAXPAGES];
		struct svc_rdma_chunk_sge ch[RPCSVC_MAXPAGES];
		unsigned long lkey[RPCSVC_MAXPAGES];
	};
};
#define RDMACTXT_F_LAST_CTXT	2

#define	SVCRDMA_DEVCAP_FAST_REG		1	/* fast mr registration */
#define	SVCRDMA_DEVCAP_READ_W_INV	2	/* read w/ invalidate */

struct svcxprt_rdma {
	struct svc_xprt      sc_xprt;		/* SVC transport structure */
	struct rdma_cm_id    *sc_cm_id;		/* RDMA connection id */
	struct list_head     sc_accept_q;	/* Conn. waiting accept */
	int		     sc_ord;		/* RDMA read limit */
	int                  sc_max_sge;
	int                  sc_max_sge_rd;	/* max sge for read target */

	atomic_t             sc_sq_count;	/* Number of SQ WR on queue */
	unsigned int	     sc_sq_depth;	/* Depth of SQ */
	unsigned int	     sc_rq_depth;	/* Depth of RQ */
	u32		     sc_max_requests;	/* Forward credits */
	u32		     sc_max_bc_requests;/* Backward credits */
	int                  sc_max_req_size;	/* Size of each RQ WR buf */

	struct ib_pd         *sc_pd;

	atomic_t	     sc_dma_used;
	spinlock_t	     sc_ctxt_lock;
	struct list_head     sc_ctxts;
	int		     sc_ctxt_used;
	spinlock_t	     sc_map_lock;
	struct list_head     sc_maps;

	struct list_head     sc_rq_dto_q;
	spinlock_t	     sc_rq_dto_lock;
	struct ib_qp         *sc_qp;
	struct ib_cq         *sc_rq_cq;
	struct ib_cq         *sc_sq_cq;
	int		     (*sc_reader)(struct svcxprt_rdma *,
					  struct svc_rqst *,
					  struct svc_rdma_op_ctxt *,
					  int *, u32 *, u32, u32, u64, bool);
	u32		     sc_dev_caps;	/* distilled device caps */
	unsigned int	     sc_frmr_pg_list_len;
	struct list_head     sc_frmr_q;
	spinlock_t	     sc_frmr_q_lock;

	spinlock_t	     sc_lock;		/* transport lock */

	wait_queue_head_t    sc_send_wait;	/* SQ exhaustion waitlist */
	unsigned long	     sc_flags;
	struct list_head     sc_dto_q;		/* DTO tasklet I/O pending Q */
	struct list_head     sc_read_complete_q;
	struct work_struct   sc_work;
};
/* sc_flags */
#define RDMAXPRT_RQ_PENDING	1
#define RDMAXPRT_SQ_PENDING	2
#define RDMAXPRT_CONN_PENDING	3

#define RPCRDMA_LISTEN_BACKLOG  10
/* The default ORD value is based on two outstanding full-size writes with a
 * page size of 4k, or 32k * 2 ops / 4k = 16 outstanding RDMA_READ.  */
#define RPCRDMA_ORD             (64/4)
#define RPCRDMA_SQ_DEPTH_MULT   8
#define RPCRDMA_MAX_REQUESTS    32
#define RPCRDMA_MAX_REQ_SIZE    4096

/* Typical ULP usage of BC requests is NFSv4.1 backchannel. Our
 * current NFSv4.1 implementation supports one backchannel slot.
 */
#define RPCRDMA_MAX_BC_REQUESTS	2

#define RPCSVC_MAXPAYLOAD_RDMA	RPCSVC_MAXPAYLOAD

/* svc_rdma_backchannel.c */
extern int svc_rdma_handle_bc_reply(struct rpc_xprt *xprt,
				    struct rpcrdma_msg *rmsgp,
				    struct xdr_buf *rcvbuf);

/* svc_rdma_marshal.c */
extern int svc_rdma_xdr_decode_req(struct rpcrdma_msg **, struct svc_rqst *);
extern int svc_rdma_xdr_encode_error(struct svcxprt_rdma *,
				     struct rpcrdma_msg *,
				     enum rpcrdma_errcode, __be32 *);
extern void svc_rdma_xdr_encode_write_list(struct rpcrdma_msg *, int);
extern void svc_rdma_xdr_encode_reply_array(struct rpcrdma_write_array *, int);
extern void svc_rdma_xdr_encode_array_chunk(struct rpcrdma_write_array *, int,
					    __be32, __be64, u32);
extern void svc_rdma_xdr_encode_reply_header(struct svcxprt_rdma *,
					     struct rpcrdma_msg *,
					     struct rpcrdma_msg *,
					     enum rpcrdma_proc);
extern int svc_rdma_xdr_get_reply_hdr_len(struct rpcrdma_msg *);

/* svc_rdma_recvfrom.c */
extern int svc_rdma_recvfrom(struct svc_rqst *);
extern int rdma_read_chunk_lcl(struct svcxprt_rdma *, struct svc_rqst *,
			       struct svc_rdma_op_ctxt *, int *, u32 *,
			       u32, u32, u64, bool);
extern int rdma_read_chunk_frmr(struct svcxprt_rdma *, struct svc_rqst *,
				struct svc_rdma_op_ctxt *, int *, u32 *,
				u32, u32, u64, bool);

/* svc_rdma_sendto.c */
extern int svc_rdma_map_xdr(struct svcxprt_rdma *, struct xdr_buf *,
			    struct svc_rdma_req_map *, bool);
extern int svc_rdma_sendto(struct svc_rqst *);
extern struct rpcrdma_read_chunk *
	svc_rdma_get_read_chunk(struct rpcrdma_msg *);

/* svc_rdma_transport.c */
extern int svc_rdma_send(struct svcxprt_rdma *, struct ib_send_wr *);
extern void svc_rdma_send_error(struct svcxprt_rdma *, struct rpcrdma_msg *,
				enum rpcrdma_errcode);
extern int svc_rdma_post_recv(struct svcxprt_rdma *, gfp_t);
extern int svc_rdma_repost_recv(struct svcxprt_rdma *, gfp_t);
extern int svc_rdma_create_listen(struct svc_serv *, int, struct sockaddr *);
extern struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *);
extern void svc_rdma_put_context(struct svc_rdma_op_ctxt *, int);
extern void svc_rdma_unmap_dma(struct svc_rdma_op_ctxt *ctxt);
extern struct svc_rdma_req_map *svc_rdma_get_req_map(struct svcxprt_rdma *);
extern void svc_rdma_put_req_map(struct svcxprt_rdma *,
				 struct svc_rdma_req_map *);
extern struct svc_rdma_fastreg_mr *svc_rdma_get_frmr(struct svcxprt_rdma *);
extern void svc_rdma_put_frmr(struct svcxprt_rdma *,
			      struct svc_rdma_fastreg_mr *);
extern void svc_sq_reap(struct svcxprt_rdma *);
extern void svc_rq_reap(struct svcxprt_rdma *);
extern void svc_rdma_prep_reply_hdr(struct svc_rqst *);

extern struct svc_xprt_class svc_rdma_class;
#ifdef CONFIG_SUNRPC_BACKCHANNEL
extern struct svc_xprt_class svc_rdma_bc_class;
#endif

/* svc_rdma.c */
extern struct workqueue_struct *svc_rdma_wq;
extern int svc_rdma_init(void);
extern void svc_rdma_cleanup(void);

#endif
Commit	Line	Data
d21b05f1 TT	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;
03fe9931	54	extern unsigned int svcrdma_max_bc_requests;
d21b05f1 TT	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
d21b05f1 TT	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 {
cc886c9f	73	struct list_head free;
02e7452d	74	struct svc_rdma_op_ctxt *read_hdr;
0d3ebb9a	75	struct svc_rdma_fastreg_mr *frmr;
f820c57e	76	int hdr_count;
d21b05f1 TT	77	struct xdr_buf arg;
	78	struct list_head dto_q;
	79	enum ib_wr_opcode wr_op;
	80	enum ib_wc_status wc_status;
	81	u32 byte_len;
0b056c22	82	u32 position;
d21b05f1 TT	83	struct svcxprt_rdma *xprt;
	84	unsigned long flags;
	85	enum dma_data_direction direction;
	86	int count;
	87	struct ib_sge sge[RPCSVC_MAXPAGES];
	88	struct page *pages[RPCSVC_MAXPAGES];
	89	};
	90
ab96dddb TT	91	/*
	92	* NFS_ requests are mapped on the client side by the chunk lists in
	93	* the RPCRDMA header. During the fetching of the RPC from the client
	94	* and the writing of the reply to the client, the memory in the
	95	* client and the memory in the server must be mapped as contiguous
	96	* vaddr/len for access by the hardware. These data strucures keep
	97	* these mappings.
	98	*
	99	* For an RDMA_WRITE, the 'sge' maps the RPC REPLY. For RDMA_READ, the
	100	* 'sge' in the svc_rdma_req_map maps the server side RPC reply and the
	101	* 'ch' field maps the read-list of the RPCRDMA header to the 'sge'
	102	* mapping of the reply.
	103	*/
	104	struct svc_rdma_chunk_sge {
	105	int start; /* sge no for this chunk */
	106	int count; /* sge count for this chunk */
	107	};
0d3ebb9a TT	108	struct svc_rdma_fastreg_mr {
0d3ebb9a TT	109	struct ib_mr *mr;
412a15c0 SG	110	struct scatterlist *sg;
412a15c0 SG	111	int sg_nents;
0d3ebb9a	112	unsigned long access_flags;
0d3ebb9a TT	113	enum dma_data_direction direction;
	114	struct list_head frmr_list;
	115	};
ab96dddb	116	struct svc_rdma_req_map {
2fe81b23	117	struct list_head free;
ab96dddb TT	118	unsigned long count;
	119	union {
	120	struct kvec sge[RPCSVC_MAXPAGES];
	121	struct svc_rdma_chunk_sge ch[RPCSVC_MAXPAGES];
0bf48289	122	unsigned long lkey[RPCSVC_MAXPAGES];
ab96dddb TT	123	};
ab96dddb TT	124	};
d21b05f1 TT	125	#define RDMACTXT_F_LAST_CTXT 2
d21b05f1 TT	126
0d3ebb9a TT	127	#define SVCRDMA_DEVCAP_FAST_REG 1 /* fast mr registration */
	128	#define SVCRDMA_DEVCAP_READ_W_INV 2 /* read w/ invalidate */
	129
d21b05f1 TT	130	struct svcxprt_rdma {
	131	struct svc_xprt sc_xprt; /* SVC transport structure */
	132	struct rdma_cm_id sc_cm_id; / RDMA connection id */
	133	struct list_head sc_accept_q; /* Conn. waiting accept */
	134	int sc_ord; /* RDMA read limit */
d21b05f1	135	int sc_max_sge;
bc3fe2e3	136	int sc_max_sge_rd; /* max sge for read target */
d21b05f1	137
d21b05f1	138	atomic_t sc_sq_count; /* Number of SQ WR on queue */
03fe9931 CL	139	unsigned int sc_sq_depth; /* Depth of SQ */
	140	unsigned int sc_rq_depth; /* Depth of RQ */
	141	u32 sc_max_requests; /* Forward credits */
	142	u32 sc_max_bc_requests;/* Backward credits */
d21b05f1 TT	143	int sc_max_req_size; /* Size of each RQ WR buf */
	144
	145	struct ib_pd *sc_pd;
	146
87295b6c	147	atomic_t sc_dma_used;
cc886c9f CL	148	spinlock_t sc_ctxt_lock;
	149	struct list_head sc_ctxts;
	150	int sc_ctxt_used;
2fe81b23 CL	151	spinlock_t sc_map_lock;
2fe81b23 CL	152	struct list_head sc_maps;
cc886c9f	153
d21b05f1 TT	154	struct list_head sc_rq_dto_q;
	155	spinlock_t sc_rq_dto_lock;
	156	struct ib_qp *sc_qp;
	157	struct ib_cq *sc_rq_cq;
	158	struct ib_cq *sc_sq_cq;
e5452411 CL	159	int (sc_reader)(struct svcxprt_rdma ,
	160	struct svc_rqst *,
	161	struct svc_rdma_op_ctxt *,
	162	int , u32 , u32, u32, u64, bool);
0d3ebb9a	163	u32 sc_dev_caps; /* distilled device caps */
0d3ebb9a TT	164	unsigned int sc_frmr_pg_list_len;
	165	struct list_head sc_frmr_q;
	166	spinlock_t sc_frmr_q_lock;
d21b05f1 TT	167
	168	spinlock_t sc_lock; /* transport lock */
	169
	170	wait_queue_head_t sc_send_wait; /* SQ exhaustion waitlist */
	171	unsigned long sc_flags;
	172	struct list_head sc_dto_q; /* DTO tasklet I/O pending Q */
	173	struct list_head sc_read_complete_q;
8da91ea8	174	struct work_struct sc_work;
d21b05f1 TT	175	};
	176	/* sc_flags */
	177	#define RDMAXPRT_RQ_PENDING 1
	178	#define RDMAXPRT_SQ_PENDING 2
	179	#define RDMAXPRT_CONN_PENDING 3
	180
	181	#define RPCRDMA_LISTEN_BACKLOG 10
	182	/* The default ORD value is based on two outstanding full-size writes with a
	183	* page size of 4k, or 32k * 2 ops / 4k = 16 outstanding RDMA_READ. */
	184	#define RPCRDMA_ORD (64/4)
	185	#define RPCRDMA_SQ_DEPTH_MULT 8
d9bb5a43	186	#define RPCRDMA_MAX_REQUESTS 32
d21b05f1 TT	187	#define RPCRDMA_MAX_REQ_SIZE 4096
d21b05f1 TT	188
03fe9931 CL	189	/* Typical ULP usage of BC requests is NFSv4.1 backchannel. Our
	190	* current NFSv4.1 implementation supports one backchannel slot.
	191	*/
	192	#define RPCRDMA_MAX_BC_REQUESTS 2
	193
cc9a903d CL	194	#define RPCSVC_MAXPAYLOAD_RDMA RPCSVC_MAXPAYLOAD
cc9a903d CL	195
5d252f90 CL	196	/* svc_rdma_backchannel.c */
	197	extern int svc_rdma_handle_bc_reply(struct rpc_xprt *xprt,
	198	struct rpcrdma_msg *rmsgp,
	199	struct xdr_buf *rcvbuf);
	200
d21b05f1	201	/* svc_rdma_marshal.c */
d21b05f1	202	extern int svc_rdma_xdr_decode_req(struct rpcrdma_msg *, struct svc_rqst );
d21b05f1 TT	203	extern int svc_rdma_xdr_encode_error(struct svcxprt_rdma *,
d21b05f1 TT	204	struct rpcrdma_msg *,
30b7e246	205	enum rpcrdma_errcode, __be32 *);
d21b05f1 TT	206	extern void svc_rdma_xdr_encode_write_list(struct rpcrdma_msg *, int);
	207	extern void svc_rdma_xdr_encode_reply_array(struct rpcrdma_write_array *, int);
	208	extern void svc_rdma_xdr_encode_array_chunk(struct rpcrdma_write_array *, int,
1fa9c444	209	__be32, __be64, u32);
d21b05f1 TT	210	extern void svc_rdma_xdr_encode_reply_header(struct svcxprt_rdma *,
	211	struct rpcrdma_msg *,
	212	struct rpcrdma_msg *,
	213	enum rpcrdma_proc);
	214	extern int svc_rdma_xdr_get_reply_hdr_len(struct rpcrdma_msg *);
	215
	216	/* svc_rdma_recvfrom.c */
	217	extern int svc_rdma_recvfrom(struct svc_rqst *);
e5452411 CL	218	extern int rdma_read_chunk_lcl(struct svcxprt_rdma , struct svc_rqst ,
	219	struct svc_rdma_op_ctxt , int , u32 *,
	220	u32, u32, u64, bool);
	221	extern int rdma_read_chunk_frmr(struct svcxprt_rdma , struct svc_rqst ,
	222	struct svc_rdma_op_ctxt , int , u32 *,
	223	u32, u32, u64, bool);
d21b05f1 TT	224
d21b05f1 TT	225	/* svc_rdma_sendto.c */
ba986c96	226	extern int svc_rdma_map_xdr(struct svcxprt_rdma , struct xdr_buf ,
f6763c29	227	struct svc_rdma_req_map *, bool);
d21b05f1	228	extern int svc_rdma_sendto(struct svc_rqst *);
10dc4512 CL	229	extern struct rpcrdma_read_chunk *
10dc4512 CL	230	svc_rdma_get_read_chunk(struct rpcrdma_msg *);
d21b05f1 TT	231
	232	/* svc_rdma_transport.c */
	233	extern int svc_rdma_send(struct svcxprt_rdma , struct ib_send_wr );
008fdbc5 TT	234	extern void svc_rdma_send_error(struct svcxprt_rdma , struct rpcrdma_msg ,
008fdbc5 TT	235	enum rpcrdma_errcode);
39b09a1a	236	extern int svc_rdma_post_recv(struct svcxprt_rdma *, gfp_t);
bf36387a	237	extern int svc_rdma_repost_recv(struct svcxprt_rdma *, gfp_t);
d21b05f1 TT	238	extern int svc_rdma_create_listen(struct svc_serv , int, struct sockaddr );
	239	extern struct svc_rdma_op_ctxt svc_rdma_get_context(struct svcxprt_rdma );
	240	extern void svc_rdma_put_context(struct svc_rdma_op_ctxt *, int);
146b6df6	241	extern void svc_rdma_unmap_dma(struct svc_rdma_op_ctxt *ctxt);
2fe81b23 CL	242	extern struct svc_rdma_req_map svc_rdma_get_req_map(struct svcxprt_rdma );
	243	extern void svc_rdma_put_req_map(struct svcxprt_rdma *,
	244	struct svc_rdma_req_map *);
64be8608 TT	245	extern struct svc_rdma_fastreg_mr svc_rdma_get_frmr(struct svcxprt_rdma );
	246	extern void svc_rdma_put_frmr(struct svcxprt_rdma *,
	247	struct svc_rdma_fastreg_mr *);
d21b05f1 TT	248	extern void svc_sq_reap(struct svcxprt_rdma *);
d21b05f1 TT	249	extern void svc_rq_reap(struct svcxprt_rdma *);
d21b05f1 TT	250	extern void svc_rdma_prep_reply_hdr(struct svc_rqst *);
d21b05f1 TT	251
94684319 CL	252	extern struct svc_xprt_class svc_rdma_class;
	253	#ifdef CONFIG_SUNRPC_BACKCHANNEL
	254	extern struct svc_xprt_class svc_rdma_bc_class;
	255	#endif
	256
d21b05f1	257	/* svc_rdma.c */
71810ef3	258	extern struct workqueue_struct *svc_rdma_wq;
d21b05f1 TT	259	extern int svc_rdma_init(void);
	260	extern void svc_rdma_cleanup(void);
	261
d21b05f1	262	#endif