Return-Path: Received: from mail-ig0-f169.google.com ([209.85.213.169]:36350 "EHLO mail-ig0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752509AbbCXUcu (ORCPT ); Tue, 24 Mar 2015 16:32:50 -0400 Subject: [PATCH v2 15/15] xprtrdma: Make rpcrdma_{un}map_one() into inline functions From: Chuck Lever To: linux-rdma@vger.kernel.org, linux-nfs@vger.kernel.org Date: Tue, 24 Mar 2015 16:32:47 -0400 Message-ID: <20150324203247.2311.59032.stgit@manet.1015granger.net> In-Reply-To: <20150324201849.2311.53599.stgit@manet.1015granger.net> References: <20150324201849.2311.53599.stgit@manet.1015granger.net> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Sender: linux-nfs-owner@vger.kernel.org List-ID: These functions are called in a loop for each page transferred via RDMA READ or WRITE. Extract loop invariants and inline them to reduce CPU overhead. Signed-off-by: Chuck Lever --- net/sunrpc/xprtrdma/fmr_ops.c | 10 ++++++-- net/sunrpc/xprtrdma/frwr_ops.c | 10 ++++++-- net/sunrpc/xprtrdma/physical_ops.c | 10 ++++++-- net/sunrpc/xprtrdma/verbs.c | 44 ++++++----------------------------- net/sunrpc/xprtrdma/xprt_rdma.h | 45 ++++++++++++++++++++++++++++++++++-- 5 files changed, 73 insertions(+), 46 deletions(-) diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c index e8a9837..a91ba2c 100644 --- a/net/sunrpc/xprtrdma/fmr_ops.c +++ b/net/sunrpc/xprtrdma/fmr_ops.c @@ -85,6 +85,8 @@ fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, int nsegs, bool writing) { struct rpcrdma_ia *ia = &r_xprt->rx_ia; + struct ib_device *device = ia->ri_id->device; + enum dma_data_direction direction = rpcrdma_data_dir(writing); struct rpcrdma_mr_seg *seg1 = seg; struct rpcrdma_mw *mw = seg1->rl_mw; u64 physaddrs[RPCRDMA_MAX_DATA_SEGS]; @@ -97,7 +99,7 @@ fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, if (nsegs > RPCRDMA_MAX_FMR_SGES) nsegs = RPCRDMA_MAX_FMR_SGES; for (i = 0; i < nsegs;) { - rpcrdma_map_one(ia, seg, writing); + rpcrdma_map_one(device, seg, direction); physaddrs[i] = seg->mr_dma; len += seg->mr_len; ++seg; @@ -123,7 +125,7 @@ out_maperr: __func__, len, (unsigned long long)seg1->mr_dma, pageoff, i, rc); while (i--) - rpcrdma_unmap_one(ia, --seg); + rpcrdma_unmap_one(device, --seg); return rc; } @@ -135,14 +137,16 @@ fmr_op_unmap(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg) { struct rpcrdma_ia *ia = &r_xprt->rx_ia; struct rpcrdma_mr_seg *seg1 = seg; + struct ib_device *device; int rc, nsegs = seg->mr_nsegs; LIST_HEAD(l); list_add(&seg1->rl_mw->r.fmr->list, &l); rc = ib_unmap_fmr(&l); read_lock(&ia->ri_qplock); + device = ia->ri_id->device; while (seg1->mr_nsegs--) - rpcrdma_unmap_one(ia, seg++); + rpcrdma_unmap_one(device, seg++); read_unlock(&ia->ri_qplock); if (rc) goto out_err; diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c index ea59c1b..0a7b9df 100644 --- a/net/sunrpc/xprtrdma/frwr_ops.c +++ b/net/sunrpc/xprtrdma/frwr_ops.c @@ -178,6 +178,8 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, int nsegs, bool writing) { struct rpcrdma_ia *ia = &r_xprt->rx_ia; + struct ib_device *device = ia->ri_id->device; + enum dma_data_direction direction = rpcrdma_data_dir(writing); struct rpcrdma_mr_seg *seg1 = seg; struct rpcrdma_mw *mw = seg1->rl_mw; struct rpcrdma_frmr *frmr = &mw->r.frmr; @@ -197,7 +199,7 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, if (nsegs > ia->ri_max_frmr_depth) nsegs = ia->ri_max_frmr_depth; for (page_no = i = 0; i < nsegs;) { - rpcrdma_map_one(ia, seg, writing); + rpcrdma_map_one(device, seg, direction); pa = seg->mr_dma; for (seg_len = seg->mr_len; seg_len > 0; seg_len -= PAGE_SIZE) { frmr->fr_pgl->page_list[page_no++] = pa; @@ -247,7 +249,7 @@ out_senderr: ib_update_fast_reg_key(mr, --key); frmr->fr_state = FRMR_IS_INVALID; while (i--) - rpcrdma_unmap_one(ia, --seg); + rpcrdma_unmap_one(device, --seg); return rc; } @@ -261,6 +263,7 @@ frwr_op_unmap(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg) struct rpcrdma_ia *ia = &r_xprt->rx_ia; struct ib_send_wr invalidate_wr, *bad_wr; int rc, nsegs = seg->mr_nsegs; + struct ib_device *device; seg1->rl_mw->r.frmr.fr_state = FRMR_IS_INVALID; @@ -271,8 +274,9 @@ frwr_op_unmap(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg) DECR_CQCOUNT(&r_xprt->rx_ep); read_lock(&ia->ri_qplock); + device = ia->ri_id->device; while (seg1->mr_nsegs--) - rpcrdma_unmap_one(ia, seg++); + rpcrdma_unmap_one(device, seg++); rc = ib_post_send(ia->ri_id->qp, &invalidate_wr, &bad_wr); read_unlock(&ia->ri_qplock); if (rc) diff --git a/net/sunrpc/xprtrdma/physical_ops.c b/net/sunrpc/xprtrdma/physical_ops.c index 0ba130b..ba518af 100644 --- a/net/sunrpc/xprtrdma/physical_ops.c +++ b/net/sunrpc/xprtrdma/physical_ops.c @@ -50,7 +50,8 @@ physical_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, { struct rpcrdma_ia *ia = &r_xprt->rx_ia; - rpcrdma_map_one(ia, seg, writing); + rpcrdma_map_one(ia->ri_id->device, seg, + rpcrdma_data_dir(writing)); seg->mr_rkey = ia->ri_bind_mem->rkey; seg->mr_base = seg->mr_dma; seg->mr_nsegs = 1; @@ -62,7 +63,12 @@ physical_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, static int physical_op_unmap(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg) { - rpcrdma_unmap_one(&r_xprt->rx_ia, seg); + struct rpcrdma_ia *ia = &r_xprt->rx_ia; + + read_lock(&ia->ri_qplock); + rpcrdma_unmap_one(ia->ri_id->device, seg); + read_unlock(&ia->ri_qplock); + return 1; } diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index cac06f2..4870d27 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -1436,6 +1436,14 @@ 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); +} + static int rpcrdma_register_internal(struct rpcrdma_ia *ia, void *va, int len, struct ib_mr **mrp, struct ib_sge *iov) @@ -1561,42 +1569,6 @@ rpcrdma_free_regbuf(struct rpcrdma_ia *ia, struct rpcrdma_regbuf *rb) } /* - * Wrappers for chunk registration, shared by read/write chunk code. - */ - -void -rpcrdma_map_one(struct rpcrdma_ia *ia, struct rpcrdma_mr_seg *seg, bool writing) -{ - seg->mr_dir = writing ? DMA_FROM_DEVICE : DMA_TO_DEVICE; - seg->mr_dmalen = seg->mr_len; - if (seg->mr_page) - seg->mr_dma = ib_dma_map_page(ia->ri_id->device, - seg->mr_page, offset_in_page(seg->mr_offset), - seg->mr_dmalen, seg->mr_dir); - else - seg->mr_dma = ib_dma_map_single(ia->ri_id->device, - seg->mr_offset, - seg->mr_dmalen, seg->mr_dir); - if (ib_dma_mapping_error(ia->ri_id->device, seg->mr_dma)) { - dprintk("RPC: %s: mr_dma %llx mr_offset %p mr_dma_len %zu\n", - __func__, - (unsigned long long)seg->mr_dma, - seg->mr_offset, seg->mr_dmalen); - } -} - -void -rpcrdma_unmap_one(struct rpcrdma_ia *ia, struct rpcrdma_mr_seg *seg) -{ - if (seg->mr_page) - ib_dma_unmap_page(ia->ri_id->device, - seg->mr_dma, seg->mr_dmalen, seg->mr_dir); - else - ib_dma_unmap_single(ia->ri_id->device, - seg->mr_dma, seg->mr_dmalen, seg->mr_dir); -} - -/* * Prepost any receive buffer, then post send. * * Receive buffer is donated to hardware, reclaimed upon recv completion. diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index 54bcbe4..78e0b8b 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -424,8 +424,49 @@ void rpcrdma_free_regbuf(struct rpcrdma_ia *, struct rpcrdma_regbuf *); unsigned int rpcrdma_max_segments(struct rpcrdma_xprt *); -void rpcrdma_map_one(struct rpcrdma_ia *, struct rpcrdma_mr_seg *, bool); -void rpcrdma_unmap_one(struct rpcrdma_ia *, struct rpcrdma_mr_seg *); + +/* + * 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