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227 lines
7.6 KiB
227 lines
7.6 KiB
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ |
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/* |
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* Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
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* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the BSD-type |
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* license below: |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials provided |
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* with the distribution. |
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* |
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* Neither the name of the Network Appliance, Inc. nor the names of |
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* its contributors may be used to endorse or promote products |
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* derived from this software without specific prior written |
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* permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* Author: Tom Tucker <[email protected]> |
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*/ |
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#ifndef SVC_RDMA_H |
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#define SVC_RDMA_H |
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#include <linux/llist.h> |
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#include <linux/sunrpc/xdr.h> |
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#include <linux/sunrpc/svcsock.h> |
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#include <linux/sunrpc/rpc_rdma.h> |
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#include <linux/sunrpc/rpc_rdma_cid.h> |
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#include <linux/sunrpc/svc_rdma_pcl.h> |
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#include <linux/percpu_counter.h> |
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#include <rdma/ib_verbs.h> |
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#include <rdma/rdma_cm.h> |
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/* Default and maximum inline threshold sizes */ |
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enum { |
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RPCRDMA_PULLUP_THRESH = RPCRDMA_V1_DEF_INLINE_SIZE >> 1, |
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RPCRDMA_DEF_INLINE_THRESH = 4096, |
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RPCRDMA_MAX_INLINE_THRESH = 65536 |
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}; |
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/* RPC/RDMA parameters and stats */ |
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extern unsigned int svcrdma_ord; |
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extern unsigned int svcrdma_max_requests; |
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extern unsigned int svcrdma_max_bc_requests; |
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extern unsigned int svcrdma_max_req_size; |
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extern struct percpu_counter svcrdma_stat_read; |
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extern struct percpu_counter svcrdma_stat_recv; |
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extern struct percpu_counter svcrdma_stat_sq_starve; |
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extern struct percpu_counter svcrdma_stat_write; |
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struct svcxprt_rdma { |
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struct svc_xprt sc_xprt; /* SVC transport structure */ |
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struct rdma_cm_id *sc_cm_id; /* RDMA connection id */ |
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struct list_head sc_accept_q; /* Conn. waiting accept */ |
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int sc_ord; /* RDMA read limit */ |
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int sc_max_send_sges; |
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bool sc_snd_w_inv; /* OK to use Send With Invalidate */ |
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atomic_t sc_sq_avail; /* SQEs ready to be consumed */ |
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unsigned int sc_sq_depth; /* Depth of SQ */ |
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__be32 sc_fc_credits; /* Forward credits */ |
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u32 sc_max_requests; /* Max requests */ |
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u32 sc_max_bc_requests;/* Backward credits */ |
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int sc_max_req_size; /* Size of each RQ WR buf */ |
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u8 sc_port_num; |
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struct ib_pd *sc_pd; |
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spinlock_t sc_send_lock; |
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struct list_head sc_send_ctxts; |
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spinlock_t sc_rw_ctxt_lock; |
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struct list_head sc_rw_ctxts; |
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struct list_head sc_rq_dto_q; |
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spinlock_t sc_rq_dto_lock; |
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struct ib_qp *sc_qp; |
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struct ib_cq *sc_rq_cq; |
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struct ib_cq *sc_sq_cq; |
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spinlock_t sc_lock; /* transport lock */ |
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wait_queue_head_t sc_send_wait; /* SQ exhaustion waitlist */ |
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unsigned long sc_flags; |
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struct list_head sc_read_complete_q; |
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struct work_struct sc_work; |
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struct llist_head sc_recv_ctxts; |
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atomic_t sc_completion_ids; |
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}; |
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/* sc_flags */ |
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#define RDMAXPRT_CONN_PENDING 3 |
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/* |
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* Default connection parameters |
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*/ |
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enum { |
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RPCRDMA_LISTEN_BACKLOG = 10, |
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RPCRDMA_MAX_REQUESTS = 64, |
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RPCRDMA_MAX_BC_REQUESTS = 2, |
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}; |
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#define RPCSVC_MAXPAYLOAD_RDMA RPCSVC_MAXPAYLOAD |
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struct svc_rdma_recv_ctxt { |
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struct llist_node rc_node; |
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struct list_head rc_list; |
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struct ib_recv_wr rc_recv_wr; |
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struct ib_cqe rc_cqe; |
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struct rpc_rdma_cid rc_cid; |
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struct ib_sge rc_recv_sge; |
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void *rc_recv_buf; |
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struct xdr_buf rc_arg; |
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struct xdr_stream rc_stream; |
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bool rc_temp; |
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u32 rc_byte_len; |
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unsigned int rc_page_count; |
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unsigned int rc_hdr_count; |
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u32 rc_inv_rkey; |
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__be32 rc_msgtype; |
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struct svc_rdma_pcl rc_call_pcl; |
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struct svc_rdma_pcl rc_read_pcl; |
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struct svc_rdma_chunk *rc_cur_result_payload; |
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struct svc_rdma_pcl rc_write_pcl; |
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struct svc_rdma_pcl rc_reply_pcl; |
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struct page *rc_pages[RPCSVC_MAXPAGES]; |
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}; |
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struct svc_rdma_send_ctxt { |
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struct list_head sc_list; |
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struct rpc_rdma_cid sc_cid; |
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struct ib_send_wr sc_send_wr; |
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struct ib_cqe sc_cqe; |
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struct xdr_buf sc_hdrbuf; |
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struct xdr_stream sc_stream; |
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void *sc_xprt_buf; |
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int sc_page_count; |
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int sc_cur_sge_no; |
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struct page *sc_pages[RPCSVC_MAXPAGES]; |
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struct ib_sge sc_sges[]; |
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}; |
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/* svc_rdma_backchannel.c */ |
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extern void svc_rdma_handle_bc_reply(struct svc_rqst *rqstp, |
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struct svc_rdma_recv_ctxt *rctxt); |
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/* svc_rdma_recvfrom.c */ |
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extern void svc_rdma_recv_ctxts_destroy(struct svcxprt_rdma *rdma); |
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extern bool svc_rdma_post_recvs(struct svcxprt_rdma *rdma); |
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extern struct svc_rdma_recv_ctxt * |
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svc_rdma_recv_ctxt_get(struct svcxprt_rdma *rdma); |
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extern void svc_rdma_recv_ctxt_put(struct svcxprt_rdma *rdma, |
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struct svc_rdma_recv_ctxt *ctxt); |
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extern void svc_rdma_flush_recv_queues(struct svcxprt_rdma *rdma); |
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extern void svc_rdma_release_rqst(struct svc_rqst *rqstp); |
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extern int svc_rdma_recvfrom(struct svc_rqst *); |
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/* svc_rdma_rw.c */ |
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extern void svc_rdma_destroy_rw_ctxts(struct svcxprt_rdma *rdma); |
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extern int svc_rdma_send_write_chunk(struct svcxprt_rdma *rdma, |
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const struct svc_rdma_chunk *chunk, |
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const struct xdr_buf *xdr); |
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extern int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma, |
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const struct svc_rdma_recv_ctxt *rctxt, |
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const struct xdr_buf *xdr); |
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extern int svc_rdma_process_read_list(struct svcxprt_rdma *rdma, |
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struct svc_rqst *rqstp, |
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struct svc_rdma_recv_ctxt *head); |
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/* svc_rdma_sendto.c */ |
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extern void svc_rdma_send_ctxts_destroy(struct svcxprt_rdma *rdma); |
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extern struct svc_rdma_send_ctxt * |
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svc_rdma_send_ctxt_get(struct svcxprt_rdma *rdma); |
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extern void svc_rdma_send_ctxt_put(struct svcxprt_rdma *rdma, |
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struct svc_rdma_send_ctxt *ctxt); |
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extern int svc_rdma_send(struct svcxprt_rdma *rdma, |
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struct svc_rdma_send_ctxt *ctxt); |
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extern int svc_rdma_map_reply_msg(struct svcxprt_rdma *rdma, |
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struct svc_rdma_send_ctxt *sctxt, |
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const struct svc_rdma_recv_ctxt *rctxt, |
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const struct xdr_buf *xdr); |
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extern void svc_rdma_send_error_msg(struct svcxprt_rdma *rdma, |
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struct svc_rdma_send_ctxt *sctxt, |
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struct svc_rdma_recv_ctxt *rctxt, |
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int status); |
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extern int svc_rdma_sendto(struct svc_rqst *); |
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extern int svc_rdma_result_payload(struct svc_rqst *rqstp, unsigned int offset, |
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unsigned int length); |
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/* svc_rdma_transport.c */ |
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extern struct svc_xprt_class svc_rdma_class; |
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#ifdef CONFIG_SUNRPC_BACKCHANNEL |
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extern struct svc_xprt_class svc_rdma_bc_class; |
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#endif |
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/* svc_rdma.c */ |
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extern int svc_rdma_init(void); |
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extern void svc_rdma_cleanup(void); |
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#endif
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