diff options
Diffstat (limited to 'include/linux/sunrpc/svc_rdma.h')
| -rw-r--r-- | include/linux/sunrpc/svc_rdma.h | 36 |
1 files changed, 29 insertions, 7 deletions
diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h index 05eb4664d0d..ef2e3a20bf3 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; */ struct svc_rdma_op_ctxt { struct svc_rdma_op_ctxt *read_hdr; - struct list_head free_list; + int hdr_count; struct xdr_buf arg; struct list_head dto_q; enum ib_wr_opcode wr_op; @@ -86,6 +86,31 @@ struct svc_rdma_op_ctxt { 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_req_map { + unsigned long count; + union { + struct kvec sge[RPCSVC_MAXPAGES]; + struct svc_rdma_chunk_sge ch[RPCSVC_MAXPAGES]; + }; +}; + #define RDMACTXT_F_LAST_CTXT 2 struct svcxprt_rdma { @@ -93,7 +118,6 @@ struct svcxprt_rdma { 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 */ - wait_queue_head_t sc_read_wait; int sc_max_sge; int sc_sq_depth; /* Depth of SQ */ @@ -104,12 +128,8 @@ struct svcxprt_rdma { struct ib_pd *sc_pd; + atomic_t sc_dma_used; atomic_t sc_ctxt_used; - struct list_head sc_ctxt_free; - int sc_ctxt_cnt; - int sc_ctxt_bump; - int sc_ctxt_max; - spinlock_t sc_ctxt_lock; struct list_head sc_rq_dto_q; spinlock_t sc_rq_dto_lock; struct ib_qp *sc_qp; @@ -173,6 +193,8 @@ extern int svc_rdma_post_recv(struct svcxprt_rdma *); 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 struct svc_rdma_req_map *svc_rdma_get_req_map(void); +extern void svc_rdma_put_req_map(struct svc_rdma_req_map *); extern void svc_sq_reap(struct svcxprt_rdma *); extern void svc_rq_reap(struct svcxprt_rdma *); extern struct svc_xprt_class svc_rdma_class; |