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authorJ. Bruce Fields <bfields@citi.umich.edu>2008-07-03 16:24:06 -0400
committerJ. Bruce Fields <bfields@citi.umich.edu>2008-07-03 16:24:06 -0400
commite86322f611eef95aafaf726fd3965e5b211f1985 (patch)
tree28547e26df4fc6ae671dc8cc6912a53717e4db08 /include/linux/sunrpc
parentb001a1b6aa960949a24c2cdc28257dfcc9428d74 (diff)
parent8948896c9e098c6fd31a6a698a598a7cbd7fa40e (diff)
Merge branch 'for-bfields' of git://linux-nfs.org/~tomtucker/xprt-switch-2.6 into for-2.6.27
Diffstat (limited to 'include/linux/sunrpc')
-rw-r--r--include/linux/sunrpc/svc_rdma.h44
1 files changed, 34 insertions, 10 deletions
diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h
index c11bbcc081f..ef2e3a20bf3 100644
--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -71,7 +71,8 @@ extern atomic_t rdma_stat_sq_prod;
* completes.
*/
struct svc_rdma_op_ctxt {
- struct svc_rdma_op_ctxt *next;
+ struct svc_rdma_op_ctxt *read_hdr;
+ int hdr_count;
struct xdr_buf arg;
struct list_head dto_q;
enum ib_wr_opcode wr_op;
@@ -85,7 +86,31 @@ struct svc_rdma_op_ctxt {
struct page *pages[RPCSVC_MAXPAGES];
};
-#define RDMACTXT_F_READ_DONE 1
+/*
+ * 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 */
@@ -104,11 +128,8 @@ struct svcxprt_rdma {
struct ib_pd *sc_pd;
- struct svc_rdma_op_ctxt *sc_ctxt_head;
- int sc_ctxt_cnt;
- int sc_ctxt_bump;
- int sc_ctxt_max;
- spinlock_t sc_ctxt_lock;
+ atomic_t sc_dma_used;
+ atomic_t sc_ctxt_used;
struct list_head sc_rq_dto_q;
spinlock_t sc_rq_dto_lock;
struct ib_qp *sc_qp;
@@ -123,6 +144,7 @@ struct svcxprt_rdma {
struct list_head sc_dto_q; /* DTO tasklet I/O pending Q */
struct list_head sc_read_complete_q;
spinlock_t sc_read_complete_lock;
+ struct work_struct sc_work;
};
/* sc_flags */
#define RDMAXPRT_RQ_PENDING 1
@@ -164,13 +186,15 @@ extern int svc_rdma_sendto(struct svc_rqst *);
/* svc_rdma_transport.c */
extern int svc_rdma_send(struct svcxprt_rdma *, struct ib_send_wr *);
-extern int svc_rdma_send_error(struct svcxprt_rdma *, struct rpcrdma_msg *,
- enum rpcrdma_errcode);
+extern void svc_rdma_send_error(struct svcxprt_rdma *, struct rpcrdma_msg *,
+ enum rpcrdma_errcode);
struct page *svc_rdma_get_page(void);
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;