diff options
Diffstat (limited to 'net/sunrpc/xprtrdma/xprt_rdma.h')
| -rw-r--r-- | net/sunrpc/xprtrdma/xprt_rdma.h | 47 |
1 files changed, 38 insertions, 9 deletions
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index 2ebc743cb96f..95cdc66225ee 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -65,7 +65,6 @@ */ struct rpcrdma_ia { const struct rpcrdma_memreg_ops *ri_ops; - rwlock_t ri_qplock; struct ib_device *ri_device; struct rdma_cm_id *ri_id; struct ib_pd *ri_pd; @@ -73,6 +72,8 @@ struct rpcrdma_ia { struct completion ri_done; int ri_async_rc; unsigned int ri_max_frmr_depth; + unsigned int ri_max_inline_write; + unsigned int ri_max_inline_read; struct ib_qp_attr ri_qp_attr; struct ib_qp_init_attr ri_qp_init_attr; }; @@ -144,6 +145,26 @@ rdmab_to_msg(struct rpcrdma_regbuf *rb) #define RPCRDMA_DEF_GFP (GFP_NOIO | __GFP_NOWARN) +/* To ensure a transport can always make forward progress, + * the number of RDMA segments allowed in header chunk lists + * is capped at 8. This prevents less-capable devices and + * memory registrations from overrunning the Send buffer + * while building chunk lists. + * + * Elements of the Read list take up more room than the + * Write list or Reply chunk. 8 read segments means the Read + * list (or Write list or Reply chunk) cannot consume more + * than + * + * ((8 + 2) * read segment size) + 1 XDR words, or 244 bytes. + * + * And the fixed part of the header is another 24 bytes. + * + * The smallest inline threshold is 1024 bytes, ensuring that + * at least 750 bytes are available for RPC messages. + */ +#define RPCRDMA_MAX_HDR_SEGS (8) + /* * struct rpcrdma_rep -- this structure encapsulates state required to recv * and complete a reply, asychronously. It needs several pieces of @@ -162,7 +183,9 @@ rdmab_to_msg(struct rpcrdma_regbuf *rb) */ #define RPCRDMA_MAX_DATA_SEGS ((1 * 1024 * 1024) / PAGE_SIZE) -#define RPCRDMA_MAX_SEGS (RPCRDMA_MAX_DATA_SEGS + 2) /* head+tail = 2 */ + +/* data segments + head/tail for Call + head/tail for Reply */ +#define RPCRDMA_MAX_SEGS (RPCRDMA_MAX_DATA_SEGS + 4) struct rpcrdma_buffer; @@ -198,14 +221,13 @@ enum rpcrdma_frmr_state { }; struct rpcrdma_frmr { - struct scatterlist *sg; - int sg_nents; + struct scatterlist *fr_sg; + int fr_nents; + enum dma_data_direction fr_dir; struct ib_mr *fr_mr; struct ib_cqe fr_cqe; enum rpcrdma_frmr_state fr_state; struct completion fr_linv_done; - struct work_struct fr_work; - struct rpcrdma_xprt *fr_xprt; union { struct ib_reg_wr fr_regwr; struct ib_send_wr fr_invwr; @@ -222,6 +244,8 @@ struct rpcrdma_mw { struct rpcrdma_fmr fmr; struct rpcrdma_frmr frmr; }; + struct work_struct mw_work; + struct rpcrdma_xprt *mw_xprt; struct list_head mw_list; struct list_head mw_all; }; @@ -270,12 +294,14 @@ struct rpcrdma_req { unsigned int rl_niovs; unsigned int rl_nchunks; unsigned int rl_connect_cookie; + struct rpc_task *rl_task; struct rpcrdma_buffer *rl_buffer; struct rpcrdma_rep *rl_reply;/* holder for reply buffer */ struct ib_sge rl_send_iov[RPCRDMA_MAX_IOVS]; struct rpcrdma_regbuf *rl_rdmabuf; struct rpcrdma_regbuf *rl_sendbuf; struct rpcrdma_mr_seg rl_segments[RPCRDMA_MAX_SEGS]; + struct rpcrdma_mr_seg *rl_nextseg; struct ib_cqe rl_cqe; struct list_head rl_all; @@ -372,8 +398,8 @@ struct rpcrdma_memreg_ops { struct rpcrdma_mr_seg *, int, bool); void (*ro_unmap_sync)(struct rpcrdma_xprt *, struct rpcrdma_req *); - int (*ro_unmap)(struct rpcrdma_xprt *, - struct rpcrdma_mr_seg *); + void (*ro_unmap_safe)(struct rpcrdma_xprt *, + struct rpcrdma_req *, bool); int (*ro_open)(struct rpcrdma_ia *, struct rpcrdma_ep *, struct rpcrdma_create_data_internal *); @@ -456,7 +482,6 @@ struct rpcrdma_regbuf *rpcrdma_alloc_regbuf(struct rpcrdma_ia *, void rpcrdma_free_regbuf(struct rpcrdma_ia *, struct rpcrdma_regbuf *); -unsigned int rpcrdma_max_segments(struct rpcrdma_xprt *); int rpcrdma_ep_post_extra_recv(struct rpcrdma_xprt *, unsigned int); int frwr_alloc_recovery_wq(void); @@ -519,6 +544,9 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *); * RPC/RDMA protocol calls - xprtrdma/rpc_rdma.c */ int rpcrdma_marshal_req(struct rpc_rqst *); +void rpcrdma_set_max_header_sizes(struct rpcrdma_ia *, + struct rpcrdma_create_data_internal *, + unsigned int); /* RPC/RDMA module init - xprtrdma/transport.c */ @@ -534,6 +562,7 @@ void xprt_rdma_cleanup(void); #if defined(CONFIG_SUNRPC_BACKCHANNEL) int xprt_rdma_bc_setup(struct rpc_xprt *, unsigned int); int xprt_rdma_bc_up(struct svc_serv *, struct net *); +size_t xprt_rdma_bc_maxpayload(struct rpc_xprt *); int rpcrdma_bc_post_recv(struct rpcrdma_xprt *, unsigned int); void rpcrdma_bc_receive_call(struct rpcrdma_xprt *, struct rpcrdma_rep *); int rpcrdma_bc_marshal_reply(struct rpc_rqst *); |