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xprtrdma: Remove rpcrdma_map_one() and friends

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Clean up: ALLPHYSICAL is gone and FMR has been converted to use
scatterlists. There are no more users of these functions.

This patch shrinks the size of struct rpcrdma_req by about 3500
bytes on x86_64. There is one of these structs for each RPC credit
(128 credits per transport connection).

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2016-06-29 13:53:19 -04:00 committed by Anna Schumaker
parent 2dc3a69de0
commit a473018cfe
2 changed files with 0 additions and 44 deletions
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8
net/sunrpc/xprtrdma/verbs.c
View File

@ -1086,14 +1086,6 @@ rpcrdma_recv_buffer_put(struct rpcrdma_rep *rep)
* Wrappers for internal-use kmalloc memory registration, used by buffer code.
*/
void
rpcrdma_mapping_error(struct rpcrdma_mr_seg *seg)
{
dprintk("RPC: map_one: offset %p iova %llx len %zu\n",
seg->mr_offset,
(unsigned long long)seg->mr_dma, seg->mr_dmalen);
}
/**
* rpcrdma_alloc_regbuf - kmalloc and register memory for SEND/RECV buffers
* @ia: controlling rpcrdma_ia

36
net/sunrpc/xprtrdma/xprt_rdma.h
View File

@ -277,9 +277,6 @@ struct rpcrdma_mr_seg { /* chunk descriptors */
u32 mr_rkey; /* registration result */
u32 mr_len; /* length of chunk or segment */
int mr_nsegs; /* number of segments in chunk or 0 */
enum dma_data_direction mr_dir; /* segment mapping direction */
dma_addr_t mr_dma; /* segment mapping address */
size_t mr_dmalen; /* segment mapping length */
struct page *mr_page; /* owning page, if any */
char *mr_offset; /* kva if no page, else offset */
};
@ -496,45 +493,12 @@ void rpcrdma_destroy_wq(void);
* Wrappers for chunk registration, shared by read/write chunk code.
*/
void rpcrdma_mapping_error(struct rpcrdma_mr_seg *);
static inline enum dma_data_direction
rpcrdma_data_dir(bool writing)
{
return writing ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
}
static inline void
rpcrdma_map_one(struct ib_device *device, struct rpcrdma_mr_seg *seg,
enum dma_data_direction direction)
{
seg->mr_dir = direction;
seg->mr_dmalen = seg->mr_len;
if (seg->mr_page)
seg->mr_dma = ib_dma_map_page(device,
seg->mr_page, offset_in_page(seg->mr_offset),
seg->mr_dmalen, seg->mr_dir);
else
seg->mr_dma = ib_dma_map_single(device,
seg->mr_offset,
seg->mr_dmalen, seg->mr_dir);
if (ib_dma_mapping_error(device, seg->mr_dma))
rpcrdma_mapping_error(seg);
}
static inline void
rpcrdma_unmap_one(struct ib_device *device, struct rpcrdma_mr_seg *seg)
{
if (seg->mr_page)
ib_dma_unmap_page(device,
seg->mr_dma, seg->mr_dmalen, seg->mr_dir);
else
ib_dma_unmap_single(device,
seg->mr_dma, seg->mr_dmalen, seg->mr_dir);
}
/*
* RPC/RDMA connection management calls - xprtrdma/rpc_rdma.c
*/