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-rw-r--r--include/linux/sunrpc/svc_rdma.h36
1 files changed, 29 insertions, 7 deletions
diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h
index 05eb4664d0dd..ef2e3a20bf3b 100644
--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -72,7 +72,7 @@ extern atomic_t rdma_stat_sq_prod;
72 */ 72 */
73struct svc_rdma_op_ctxt { 73struct svc_rdma_op_ctxt {
74 struct svc_rdma_op_ctxt *read_hdr; 74 struct svc_rdma_op_ctxt *read_hdr;
75 struct list_head free_list; 75 int hdr_count;
76 struct xdr_buf arg; 76 struct xdr_buf arg;
77 struct list_head dto_q; 77 struct list_head dto_q;
78 enum ib_wr_opcode wr_op; 78 enum ib_wr_opcode wr_op;
@@ -86,6 +86,31 @@ struct svc_rdma_op_ctxt {
86 struct page *pages[RPCSVC_MAXPAGES]; 86 struct page *pages[RPCSVC_MAXPAGES];
87}; 87};
88 88
89/*
90 * NFS_ requests are mapped on the client side by the chunk lists in
91 * the RPCRDMA header. During the fetching of the RPC from the client
92 * and the writing of the reply to the client, the memory in the
93 * client and the memory in the server must be mapped as contiguous
94 * vaddr/len for access by the hardware. These data strucures keep
95 * these mappings.
96 *
97 * For an RDMA_WRITE, the 'sge' maps the RPC REPLY. For RDMA_READ, the
98 * 'sge' in the svc_rdma_req_map maps the server side RPC reply and the
99 * 'ch' field maps the read-list of the RPCRDMA header to the 'sge'
100 * mapping of the reply.
101 */
102struct svc_rdma_chunk_sge {
103 int start; /* sge no for this chunk */
104 int count; /* sge count for this chunk */
105};
106struct svc_rdma_req_map {
107 unsigned long count;
108 union {
109 struct kvec sge[RPCSVC_MAXPAGES];
110 struct svc_rdma_chunk_sge ch[RPCSVC_MAXPAGES];
111 };
112};
113
89#define RDMACTXT_F_LAST_CTXT 2 114#define RDMACTXT_F_LAST_CTXT 2
90 115
91struct svcxprt_rdma { 116struct svcxprt_rdma {
@@ -93,7 +118,6 @@ struct svcxprt_rdma {
93 struct rdma_cm_id *sc_cm_id; /* RDMA connection id */ 118 struct rdma_cm_id *sc_cm_id; /* RDMA connection id */
94 struct list_head sc_accept_q; /* Conn. waiting accept */ 119 struct list_head sc_accept_q; /* Conn. waiting accept */
95 int sc_ord; /* RDMA read limit */ 120 int sc_ord; /* RDMA read limit */
96 wait_queue_head_t sc_read_wait;
97 int sc_max_sge; 121 int sc_max_sge;
98 122
99 int sc_sq_depth; /* Depth of SQ */ 123 int sc_sq_depth; /* Depth of SQ */
@@ -104,12 +128,8 @@ struct svcxprt_rdma {
104 128
105 struct ib_pd *sc_pd; 129 struct ib_pd *sc_pd;
106 130
131 atomic_t sc_dma_used;
107 atomic_t sc_ctxt_used; 132 atomic_t sc_ctxt_used;
108 struct list_head sc_ctxt_free;
109 int sc_ctxt_cnt;
110 int sc_ctxt_bump;
111 int sc_ctxt_max;
112 spinlock_t sc_ctxt_lock;
113 struct list_head sc_rq_dto_q; 133 struct list_head sc_rq_dto_q;
114 spinlock_t sc_rq_dto_lock; 134 spinlock_t sc_rq_dto_lock;
115 struct ib_qp *sc_qp; 135 struct ib_qp *sc_qp;
@@ -173,6 +193,8 @@ extern int svc_rdma_post_recv(struct svcxprt_rdma *);
173extern int svc_rdma_create_listen(struct svc_serv *, int, struct sockaddr *); 193extern int svc_rdma_create_listen(struct svc_serv *, int, struct sockaddr *);
174extern struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *); 194extern struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *);
175extern void svc_rdma_put_context(struct svc_rdma_op_ctxt *, int); 195extern void svc_rdma_put_context(struct svc_rdma_op_ctxt *, int);
196extern struct svc_rdma_req_map *svc_rdma_get_req_map(void);
197extern void svc_rdma_put_req_map(struct svc_rdma_req_map *);
176extern void svc_sq_reap(struct svcxprt_rdma *); 198extern void svc_sq_reap(struct svcxprt_rdma *);
177extern void svc_rq_reap(struct svcxprt_rdma *); 199extern void svc_rq_reap(struct svcxprt_rdma *);
178extern struct svc_xprt_class svc_rdma_class; 200extern struct svc_xprt_class svc_rdma_class;