1c9351ee0e
The max_payload computation is generalized to ensure that the payload maximum is the lesser of RPC_MAX_DATA_SEGS and the number of data segments that can be transmitted in an inline buffer. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Tested-by: Devesh Sharma <Devesh.Sharma@Emulex.Com> Tested-by: Meghana Cheripady <Meghana.Cheripady@Emulex.Com> Tested-by: Veeresh U. Kokatnur <veereshuk@chelsio.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
36 lines
1.0 KiB
C
36 lines
1.0 KiB
C
/*
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* Copyright (c) 2015 Oracle. All rights reserved.
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* Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
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*/
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/* Lightweight memory registration using Fast Registration Work
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* Requests (FRWR). Also referred to sometimes as FRMR mode.
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*
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* FRWR features ordered asynchronous registration and deregistration
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* of arbitrarily sized memory regions. This is the fastest and safest
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* but most complex memory registration mode.
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*/
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#include "xprt_rdma.h"
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#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
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# define RPCDBG_FACILITY RPCDBG_TRANS
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#endif
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/* FRWR mode conveys a list of pages per chunk segment. The
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* maximum length of that list is the FRWR page list depth.
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*/
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static size_t
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frwr_op_maxpages(struct rpcrdma_xprt *r_xprt)
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{
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struct rpcrdma_ia *ia = &r_xprt->rx_ia;
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return min_t(unsigned int, RPCRDMA_MAX_DATA_SEGS,
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rpcrdma_max_segments(r_xprt) * ia->ri_max_frmr_depth);
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}
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const struct rpcrdma_memreg_ops rpcrdma_frwr_memreg_ops = {
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.ro_maxpages = frwr_op_maxpages,
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.ro_displayname = "frwr",
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};
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