From a473018cfe0ef1e46c0ff9df3fa02afc23c9f1d2 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Wed, 29 Jun 2016 13:53:19 -0400 Subject: [PATCH] xprtrdma: Remove rpcrdma_map_one() and friends 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 Tested-by: Steve Wise Signed-off-by: Anna Schumaker --- net/sunrpc/xprtrdma/verbs.c | 8 -------- net/sunrpc/xprtrdma/xprt_rdma.h | 36 --------------------------------- 2 files changed, 44 deletions(-) diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index 5ee98e9d0fe9..b80e767fe687 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -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 diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index bcb168e3fe15..f1b6f2fb5355 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -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 */ -- 2.20.1