diff options
author | Tom Tucker <tom@opengridcomputing.com> | 2008-05-28 18:54:04 (GMT) |
---|---|---|
committer | Tom Tucker <tom@opengridcomputing.com> | 2008-07-02 20:01:53 (GMT) |
commit | ab96dddbedf4bb8a7a0fe44012efc1d99598c36f (patch) | |
tree | bb3fcfe50264d9a0eb63b768aab8154d70185975 /include/linux/sunrpc/svc_rdma.h | |
parent | e1441b9a41c33aa9236008a7cfe49a8e723fb397 (diff) | |
download | linux-fsl-qoriq-ab96dddbedf4bb8a7a0fe44012efc1d99598c36f.tar.xz |
svcrdma: Add a type for keeping NFS RPC mapping
Create a new data structure to hold the remote client address space
to local server address space mapping.
Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Diffstat (limited to 'include/linux/sunrpc/svc_rdma.h')
-rw-r--r-- | include/linux/sunrpc/svc_rdma.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h index 05eb466..bd8749c 100644 --- a/include/linux/sunrpc/svc_rdma.h +++ b/include/linux/sunrpc/svc_rdma.h @@ -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 { @@ -173,6 +198,8 @@ 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; |