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xprtrdma: Remove fr_state

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Now that both the Send and Receive completions are handled in
process context, it is safe to DMA unmap and return MRs to the
free or recycle lists directly in the completion handlers.

Doing this means rpcrdma_frwr no longer needs to track the state of
each MR, meaning that a VALID or FLUSHED MR can no longer appear on
an xprt's MR free list. Thus there is no longer a need to track the
MR's registration state in rpcrdma_frwr.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever
2019-06-19 10:32:59 -04:00
committed by Anna Schumaker
parent 5809ea4f7c
commit 847568942f
4 changed files with 97 additions and 141 deletions
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11
net/sunrpc/xprtrdma/xprt_rdma.h
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@@ -240,17 +240,9 @@ struct rpcrdma_sendctx {
* An external memory region is any buffer or page that is registered
* on the fly (ie, not pre-registered).
*/
enum rpcrdma_frwr_state {
FRWR_IS_INVALID, /* ready to be used */
FRWR_IS_VALID, /* in use */
FRWR_FLUSHED_FR, /* flushed FASTREG WR */
FRWR_FLUSHED_LI, /* flushed LOCALINV WR */
};
struct rpcrdma_frwr {
struct ib_mr *fr_mr;
struct ib_cqe fr_cqe;
enum rpcrdma_frwr_state fr_state;
struct completion fr_linv_done;
union {
struct ib_reg_wr fr_regwr;
@@ -567,8 +559,7 @@ struct rpcrdma_mr_seg *frwr_map(struct rpcrdma_xprt *r_xprt,
struct rpcrdma_mr **mr);
int frwr_send(struct rpcrdma_ia *ia, 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 list_head *mrs);
void frwr_unmap_sync(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req);
/*
* RPC/RDMA protocol calls - xprtrdma/rpc_rdma.c