diff options
Diffstat (limited to 'net/sunrpc/xprtrdma/xprt_rdma.h')
| -rw-r--r-- | net/sunrpc/xprtrdma/xprt_rdma.h | 156 |
1 files changed, 76 insertions, 80 deletions
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index 37d5080c250b..5e5ff6784ef5 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -53,6 +53,7 @@ #include <rdma/ib_verbs.h> /* RDMA verbs api */ #include <linux/sunrpc/clnt.h> /* rpc_xprt */ +#include <linux/sunrpc/rpc_rdma_cid.h> /* completion IDs */ #include <linux/sunrpc/rpc_rdma.h> /* RPC/RDMA protocol */ #include <linux/sunrpc/xprtrdma.h> /* xprt parameters */ @@ -65,48 +66,45 @@ #define RPCRDMA_IDLE_DISC_TO (5U * 60 * HZ) /* - * Interface Adapter -- one per transport instance + * RDMA Endpoint -- connection endpoint details */ -struct rpcrdma_ia { - struct rdma_cm_id *ri_id; - struct ib_pd *ri_pd; - int ri_async_rc; - unsigned int ri_max_rdma_segs; - unsigned int ri_max_frwr_depth; - bool ri_implicit_roundup; - enum ib_mr_type ri_mrtype; - unsigned long ri_flags; - struct completion ri_done; - struct completion ri_remove_done; -}; - -enum { - RPCRDMA_IAF_REMOVING = 0, -}; - -/* - * RDMA Endpoint -- one per transport instance - */ - +struct rpcrdma_mr; struct rpcrdma_ep { - unsigned int rep_send_count; - unsigned int rep_send_batch; - unsigned int rep_max_inline_send; - unsigned int rep_max_inline_recv; - int rep_connected; - struct ib_qp_init_attr rep_attr; - wait_queue_head_t rep_connect_wait; - struct rpcrdma_connect_private rep_cm_private; - struct rdma_conn_param rep_remote_cma; - unsigned int rep_max_requests; /* depends on device */ - unsigned int rep_inline_send; /* negotiated */ - unsigned int rep_inline_recv; /* negotiated */ - int rep_receive_count; + struct kref re_kref; + struct rdma_cm_id *re_id; + struct ib_pd *re_pd; + unsigned int re_max_rdma_segs; + unsigned int re_max_fr_depth; + struct rpcrdma_mr *re_write_pad_mr; + enum ib_mr_type re_mrtype; + struct completion re_done; + unsigned int re_send_count; + unsigned int re_send_batch; + unsigned int re_max_inline_send; + unsigned int re_max_inline_recv; + int re_async_rc; + int re_connect_status; + atomic_t re_receiving; + atomic_t re_force_disconnect; + struct ib_qp_init_attr re_attr; + wait_queue_head_t re_connect_wait; + struct rpc_xprt *re_xprt; + struct rpcrdma_connect_private + re_cm_private; + struct rdma_conn_param re_remote_cma; + int re_receive_count; + unsigned int re_max_requests; /* depends on device */ + unsigned int re_inline_send; /* negotiated */ + unsigned int re_inline_recv; /* negotiated */ + + atomic_t re_completion_ids; + + char re_write_pad[XDR_UNIT]; }; -/* Pre-allocate extra Work Requests for handling backward receives - * and sends. This is a fixed value because the Work Queues are - * allocated when the forward channel is set up, long before the +/* Pre-allocate extra Work Requests for handling reverse-direction + * Receives and Sends. This is a fixed value because the Work Queues + * are allocated when the forward channel is set up, long before the * backchannel is provisioned. This value is two times * NFS4_DEF_CB_SLOT_TABLE_SIZE. */ @@ -151,7 +149,11 @@ static inline void *rdmab_data(const struct rpcrdma_regbuf *rb) return rb->rg_data; } -#define RPCRDMA_DEF_GFP (GFP_NOIO | __GFP_NOWARN) +/* Do not use emergency memory reserves, and fail quickly if memory + * cannot be allocated easily. These flags may be used wherever there + * is robust logic to handle a failure to allocate. + */ +#define XPRTRDMA_GFP_FLAGS (__GFP_NOMEMALLOC | __GFP_NORETRY | __GFP_NOWARN) /* To ensure a transport can always make forward progress, * the number of RDMA segments allowed in header chunk lists @@ -189,6 +191,8 @@ enum { struct rpcrdma_rep { struct ib_cqe rr_cqe; + struct rpc_rdma_cid rr_cid; + __be32 rr_xid; __be32 rr_vers; __be32 rr_proc; @@ -220,6 +224,7 @@ enum { struct rpcrdma_req; struct rpcrdma_sendctx { struct ib_cqe sc_cqe; + struct rpc_rdma_cid sc_cid; struct rpcrdma_req *sc_req; unsigned int sc_unmap_count; struct ib_sge sc_sges[]; @@ -231,29 +236,28 @@ struct rpcrdma_sendctx { * An external memory region is any buffer or page that is registered * on the fly (ie, not pre-registered). */ -struct rpcrdma_frwr { - struct ib_mr *fr_mr; - struct ib_cqe fr_cqe; - struct completion fr_linv_done; - union { - struct ib_reg_wr fr_regwr; - struct ib_send_wr fr_invwr; - }; -}; - struct rpcrdma_req; struct rpcrdma_mr { struct list_head mr_list; struct rpcrdma_req *mr_req; + + struct ib_mr *mr_ibmr; + struct ib_device *mr_device; struct scatterlist *mr_sg; int mr_nents; enum dma_data_direction mr_dir; - struct rpcrdma_frwr frwr; + struct ib_cqe mr_cqe; + struct completion mr_linv_done; + union { + struct ib_reg_wr mr_regwr; + struct ib_send_wr mr_invwr; + }; struct rpcrdma_xprt *mr_xprt; u32 mr_handle; u32 mr_length; u64 mr_offset; struct list_head mr_all; + struct rpc_rdma_cid mr_cid; }; /* @@ -284,10 +288,11 @@ enum { RPCRDMA_MAX_IOV_SEGS, }; -struct rpcrdma_mr_seg { /* chunk descriptors */ - u32 mr_len; /* length of chunk or segment */ - struct page *mr_page; /* owning page, if any */ - char *mr_offset; /* kva if no page, else offset */ +/* Arguments for DMA mapping and registration */ +struct rpcrdma_mr_seg { + u32 mr_len; /* length of segment */ + struct page *mr_page; /* underlying struct page */ + u64 mr_offset; /* IN: page offset, OUT: iova */ }; /* The Send SGE array is provisioned to send a maximum size @@ -422,8 +427,7 @@ struct rpcrdma_stats { */ struct rpcrdma_xprt { struct rpc_xprt rx_xprt; - struct rpcrdma_ia rx_ia; - struct rpcrdma_ep rx_ep; + struct rpcrdma_ep *rx_ep; struct rpcrdma_buffer rx_buf; struct delayed_work rx_connect_worker; struct rpc_timeout rx_timeout; @@ -455,29 +459,20 @@ extern int xprt_rdma_pad_optimize; extern unsigned int xprt_rdma_memreg_strategy; /* - * Interface Adapter calls - xprtrdma/verbs.c - */ -int rpcrdma_ia_open(struct rpcrdma_xprt *xprt); -void rpcrdma_ia_remove(struct rpcrdma_ia *ia); -void rpcrdma_ia_close(struct rpcrdma_ia *); - -/* * Endpoint calls - xprtrdma/verbs.c */ -int rpcrdma_ep_create(struct rpcrdma_xprt *r_xprt); -void rpcrdma_ep_destroy(struct rpcrdma_xprt *r_xprt); -int rpcrdma_ep_connect(struct rpcrdma_ep *, struct rpcrdma_ia *); -void rpcrdma_ep_disconnect(struct rpcrdma_ep *, struct rpcrdma_ia *); +void rpcrdma_force_disconnect(struct rpcrdma_ep *ep); +void rpcrdma_flush_disconnect(struct rpcrdma_xprt *r_xprt, struct ib_wc *wc); +int rpcrdma_xprt_connect(struct rpcrdma_xprt *r_xprt); +void rpcrdma_xprt_disconnect(struct rpcrdma_xprt *r_xprt); -int rpcrdma_ep_post(struct rpcrdma_ia *, struct rpcrdma_ep *, - struct rpcrdma_req *); -void rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, bool temp); +void rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, int needed, bool temp); /* * Buffer calls - xprtrdma/verbs.c */ -struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size, - gfp_t flags); +struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, + size_t size); int rpcrdma_req_setup(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req); void rpcrdma_req_destroy(struct rpcrdma_req *req); int rpcrdma_buffer_create(struct rpcrdma_xprt *); @@ -485,13 +480,13 @@ void rpcrdma_buffer_destroy(struct rpcrdma_buffer *); struct rpcrdma_sendctx *rpcrdma_sendctx_get_locked(struct rpcrdma_xprt *r_xprt); struct rpcrdma_mr *rpcrdma_mr_get(struct rpcrdma_xprt *r_xprt); -void rpcrdma_mr_put(struct rpcrdma_mr *mr); void rpcrdma_mrs_refresh(struct rpcrdma_xprt *r_xprt); struct rpcrdma_req *rpcrdma_buffer_get(struct rpcrdma_buffer *); void rpcrdma_buffer_put(struct rpcrdma_buffer *buffers, struct rpcrdma_req *req); -void rpcrdma_recv_buffer_put(struct rpcrdma_rep *); +void rpcrdma_rep_put(struct rpcrdma_buffer *buf, struct rpcrdma_rep *rep); +void rpcrdma_reply_put(struct rpcrdma_buffer *buffers, struct rpcrdma_req *req); bool rpcrdma_regbuf_realloc(struct rpcrdma_regbuf *rb, size_t size, gfp_t flags); @@ -536,18 +531,18 @@ rpcrdma_data_dir(bool writing) /* Memory registration calls xprtrdma/frwr_ops.c */ void frwr_reset(struct rpcrdma_req *req); -int frwr_query_device(struct rpcrdma_xprt *r_xprt, - const struct ib_device *device); -int frwr_init_mr(struct rpcrdma_ia *ia, struct rpcrdma_mr *mr); -void frwr_release_mr(struct rpcrdma_mr *mr); +int frwr_query_device(struct rpcrdma_ep *ep, const struct ib_device *device); +int frwr_mr_init(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr *mr); +void frwr_mr_release(struct rpcrdma_mr *mr); struct rpcrdma_mr_seg *frwr_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, int nsegs, bool writing, __be32 xid, struct rpcrdma_mr *mr); -int frwr_send(struct rpcrdma_ia *ia, struct rpcrdma_req *req); +int frwr_send(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req); void frwr_reminv(struct rpcrdma_rep *rep, struct list_head *mrs); void frwr_unmap_sync(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req); void frwr_unmap_async(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req); +int frwr_wp_create(struct rpcrdma_xprt *r_xprt); /* * RPC/RDMA protocol calls - xprtrdma/rpc_rdma.c @@ -569,9 +564,10 @@ int rpcrdma_prepare_send_sges(struct rpcrdma_xprt *r_xprt, enum rpcrdma_chunktype rtype); void rpcrdma_sendctx_unmap(struct rpcrdma_sendctx *sc); int rpcrdma_marshal_req(struct rpcrdma_xprt *r_xprt, struct rpc_rqst *rqst); -void rpcrdma_set_max_header_sizes(struct rpcrdma_xprt *); +void rpcrdma_set_max_header_sizes(struct rpcrdma_ep *ep); void rpcrdma_reset_cwnd(struct rpcrdma_xprt *r_xprt); void rpcrdma_complete_rqst(struct rpcrdma_rep *rep); +void rpcrdma_unpin_rqst(struct rpcrdma_rep *rep); void rpcrdma_reply_handler(struct rpcrdma_rep *rep); static inline void rpcrdma_set_xdrlen(struct xdr_buf *xdr, size_t len) |