diff options
Diffstat (limited to 'net/sunrpc/xprtrdma/xprt_rdma.h')
| -rw-r--r-- | net/sunrpc/xprtrdma/xprt_rdma.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index 5c2fac3..36c37c6 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -106,6 +106,44 @@ struct rpcrdma_ep { #define INIT_CQCOUNT(ep) atomic_set(&(ep)->rep_cqcount, (ep)->rep_cqinit) #define DECR_CQCOUNT(ep) atomic_sub_return(1, &(ep)->rep_cqcount) +/* Registered buffer -- registered kmalloc'd memory for RDMA SEND/RECV + * + * The below structure appears at the front of a large region of kmalloc'd + * memory, which always starts on a good alignment boundary. + */ + +struct rpcrdma_regbuf { + size_t rg_size; + struct rpcrdma_req *rg_owner; + struct ib_mr *rg_mr; + struct ib_sge rg_iov; + __be32 rg_base[0] __attribute__ ((aligned(256))); +}; + +static inline u64 +rdmab_addr(struct rpcrdma_regbuf *rb) +{ + return rb->rg_iov.addr; +} + +static inline u32 +rdmab_length(struct rpcrdma_regbuf *rb) +{ + return rb->rg_iov.length; +} + +static inline u32 +rdmab_lkey(struct rpcrdma_regbuf *rb) +{ + return rb->rg_iov.lkey; +} + +static inline struct rpcrdma_msg * +rdmab_to_msg(struct rpcrdma_regbuf *rb) +{ + return (struct rpcrdma_msg *)rb->rg_base; +} + enum rpcrdma_chunktype { rpcrdma_noch = 0, rpcrdma_readch, @@ -372,6 +410,11 @@ int rpcrdma_register_external(struct rpcrdma_mr_seg *, int rpcrdma_deregister_external(struct rpcrdma_mr_seg *, struct rpcrdma_xprt *); +struct rpcrdma_regbuf *rpcrdma_alloc_regbuf(struct rpcrdma_ia *, + size_t, gfp_t); +void rpcrdma_free_regbuf(struct rpcrdma_ia *, + struct rpcrdma_regbuf *); + /* * RPC/RDMA connection management calls - xprtrdma/rpc_rdma.c */ |