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svcrdma: Remove the req_map cache

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req_maps are no longer used by the send path and can thus be removed.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Chuck Lever
2017-04-09 13:07:13 -04:00
committed by J. Bruce Fields
parent 68cc4636bb
commit 2cf32924c6
3 changed files with 1 additions and 185 deletions
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34
include/linux/sunrpc/svc_rdma.h
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@@ -96,23 +96,6 @@ struct svc_rdma_op_ctxt {
struct page *pages[RPCSVC_MAXPAGES];
};
/*
* NFS_ requests are mapped on the client side by the chunk lists in
* the RPCRDMA header. During the fetching of the RPC from the client
* and the writing of the reply to the client, the memory in the
* client and the memory in the server must be mapped as contiguous
* vaddr/len for access by the hardware. These data strucures keep
* these mappings.
*
* For an RDMA_WRITE, the 'sge' maps the RPC REPLY. For RDMA_READ, the
* 'sge' in the svc_rdma_req_map maps the server side RPC reply and the
* 'ch' field maps the read-list of the RPCRDMA header to the 'sge'
* mapping of the reply.
*/
struct svc_rdma_chunk_sge {
int start; /* sge no for this chunk */
int count; /* sge count for this chunk */
};
struct svc_rdma_fastreg_mr {
struct ib_mr *mr;
struct scatterlist *sg;
@@ -121,15 +104,7 @@ struct svc_rdma_fastreg_mr {
enum dma_data_direction direction;
struct list_head frmr_list;
};
struct svc_rdma_req_map {
struct list_head free;
unsigned long count;
union {
struct kvec sge[RPCSVC_MAXPAGES];
struct svc_rdma_chunk_sge ch[RPCSVC_MAXPAGES];
unsigned long lkey[RPCSVC_MAXPAGES];
};
};
#define RDMACTXT_F_LAST_CTXT 2
#define SVCRDMA_DEVCAP_FAST_REG 1 /* fast mr registration */
@@ -160,8 +135,6 @@ struct svcxprt_rdma {
int sc_ctxt_used;
spinlock_t sc_rw_ctxt_lock;
struct list_head sc_rw_ctxts;
spinlock_t sc_map_lock;
struct list_head sc_maps;
struct list_head sc_rq_dto_q;
spinlock_t sc_rq_dto_lock;
@@ -237,8 +210,6 @@ extern int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma,
struct xdr_buf *xdr);
/* svc_rdma_sendto.c */
extern int svc_rdma_map_xdr(struct svcxprt_rdma *, struct xdr_buf *,
struct svc_rdma_req_map *, bool);
extern int svc_rdma_map_reply_hdr(struct svcxprt_rdma *rdma,
struct svc_rdma_op_ctxt *ctxt,
__be32 *rdma_resp, unsigned int len);
@@ -259,9 +230,6 @@ extern int svc_rdma_create_listen(struct svc_serv *, int, struct sockaddr *);
extern struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *);
extern void svc_rdma_put_context(struct svc_rdma_op_ctxt *, int);
extern void svc_rdma_unmap_dma(struct svc_rdma_op_ctxt *ctxt);
extern struct svc_rdma_req_map *svc_rdma_get_req_map(struct svcxprt_rdma *);
extern void svc_rdma_put_req_map(struct svcxprt_rdma *,
struct svc_rdma_req_map *);
extern struct svc_rdma_fastreg_mr *svc_rdma_get_frmr(struct svcxprt_rdma *);
extern void svc_rdma_put_frmr(struct svcxprt_rdma *,
struct svc_rdma_fastreg_mr *);