summaryrefslogtreecommitdiff
path: root/net/sunrpc/xprtrdma/xprt_rdma.h
diff options
context:
space:
mode:
Diffstat (limited to 'net/sunrpc/xprtrdma/xprt_rdma.h')
-rw-r--r--net/sunrpc/xprtrdma/xprt_rdma.h61
1 files changed, 49 insertions, 12 deletions
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 89e7cd479705..c419498b8f46 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -59,6 +59,7 @@
* Interface Adapter -- one per transport instance
*/
struct rpcrdma_ia {
+ rwlock_t ri_qplock;
struct rdma_cm_id *ri_id;
struct ib_pd *ri_pd;
struct ib_mr *ri_bind_mem;
@@ -98,6 +99,14 @@ 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)
+enum rpcrdma_chunktype {
+ rpcrdma_noch = 0,
+ rpcrdma_readch,
+ rpcrdma_areadch,
+ rpcrdma_writech,
+ rpcrdma_replych
+};
+
/*
* struct rpcrdma_rep -- this structure encapsulates state required to recv
* and complete a reply, asychronously. It needs several pieces of
@@ -137,6 +146,40 @@ struct rpcrdma_rep {
};
/*
+ * struct rpcrdma_mw - external memory region metadata
+ *
+ * An external memory region is any buffer or page that is registered
+ * on the fly (ie, not pre-registered).
+ *
+ * Each rpcrdma_buffer has a list of free MWs anchored in rb_mws. During
+ * call_allocate, rpcrdma_buffer_get() assigns one to each segment in
+ * an rpcrdma_req. Then rpcrdma_register_external() grabs these to keep
+ * track of registration metadata while each RPC is pending.
+ * rpcrdma_deregister_external() uses this metadata to unmap and
+ * release these resources when an RPC is complete.
+ */
+enum rpcrdma_frmr_state {
+ FRMR_IS_INVALID, /* ready to be used */
+ FRMR_IS_VALID, /* in use */
+ FRMR_IS_STALE, /* failed completion */
+};
+
+struct rpcrdma_frmr {
+ struct ib_fast_reg_page_list *fr_pgl;
+ struct ib_mr *fr_mr;
+ enum rpcrdma_frmr_state fr_state;
+};
+
+struct rpcrdma_mw {
+ union {
+ struct ib_fmr *fmr;
+ struct rpcrdma_frmr frmr;
+ } r;
+ struct list_head mw_list;
+ struct list_head mw_all;
+};
+
+/*
* struct rpcrdma_req -- structure central to the request/reply sequence.
*
* N of these are associated with a transport instance, and stored in
@@ -163,17 +206,7 @@ struct rpcrdma_rep {
struct rpcrdma_mr_seg { /* chunk descriptors */
union { /* chunk memory handles */
struct ib_mr *rl_mr; /* if registered directly */
- struct rpcrdma_mw { /* if registered from region */
- union {
- struct ib_fmr *fmr;
- struct {
- struct ib_fast_reg_page_list *fr_pgl;
- struct ib_mr *fr_mr;
- enum { FRMR_IS_INVALID, FRMR_IS_VALID } state;
- } frmr;
- } r;
- struct list_head mw_list;
- } *rl_mw;
+ struct rpcrdma_mw *rl_mw; /* if registered from region */
} mr_chunk;
u64 mr_base; /* registration result */
u32 mr_rkey; /* registration result */
@@ -191,6 +224,7 @@ struct rpcrdma_req {
unsigned int rl_niovs; /* 0, 2 or 4 */
unsigned int rl_nchunks; /* non-zero if chunks */
unsigned int rl_connect_cookie; /* retry detection */
+ enum rpcrdma_chunktype rl_rtype, rl_wtype;
struct rpcrdma_buffer *rl_buffer; /* home base for this structure */
struct rpcrdma_rep *rl_reply;/* holder for reply buffer */
struct rpcrdma_mr_seg rl_segments[RPCRDMA_MAX_SEGS];/* chunk segments */
@@ -214,6 +248,7 @@ struct rpcrdma_buffer {
atomic_t rb_credits; /* most recent server credits */
int rb_max_requests;/* client max requests */
struct list_head rb_mws; /* optional memory windows/fmrs/frmrs */
+ struct list_head rb_all;
int rb_send_index;
struct rpcrdma_req **rb_send_bufs;
int rb_recv_index;
@@ -306,7 +341,7 @@ int rpcrdma_ep_create(struct rpcrdma_ep *, struct rpcrdma_ia *,
struct rpcrdma_create_data_internal *);
void rpcrdma_ep_destroy(struct rpcrdma_ep *, struct rpcrdma_ia *);
int rpcrdma_ep_connect(struct rpcrdma_ep *, struct rpcrdma_ia *);
-int rpcrdma_ep_disconnect(struct rpcrdma_ep *, struct rpcrdma_ia *);
+void rpcrdma_ep_disconnect(struct rpcrdma_ep *, struct rpcrdma_ia *);
int rpcrdma_ep_post(struct rpcrdma_ia *, struct rpcrdma_ep *,
struct rpcrdma_req *);
@@ -346,7 +381,9 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *);
/*
* RPC/RDMA protocol calls - xprtrdma/rpc_rdma.c
*/
+ssize_t rpcrdma_marshal_chunks(struct rpc_rqst *, ssize_t);
int rpcrdma_marshal_req(struct rpc_rqst *);
+size_t rpcrdma_max_payload(struct rpcrdma_xprt *);
/* Temporary NFS request map cache. Created in svc_rdma.c */
extern struct kmem_cache *svc_rdma_map_cachep;