*/
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;
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 {
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 */
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;
unsigned long sc_flags;
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 */
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;