From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas@monjalon.net>
Subject: Re: [PATCH v5 3/5] common/dpaax: add library for PA VA
	translation table
Date: Tue, 16 Oct 2018 01:17:47 +0200
Message-ID: <2346030.H0sUSFOX6A@xps>
References: <20181015064202.20802-1-shreyansh.jain@nxp.com>
 <20181015120156.27793-1-shreyansh.jain@nxp.com>
 <20181015120156.27793-4-shreyansh.jain@nxp.com>
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Cc: dev@dpdk.org, ferruh.yigit@intel.com, anatoly.burakov@intel.com,
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To: Shreyansh Jain <shreyansh.jain@nxp.com>
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15/10/2018 14:01, Shreyansh Jain:
> A common library, valid for dpaaX drivers, which is used to maintain
> a local copy of PA->VA translations.
> 
> In case of physical addressing mode (one of the option for FSLMC, and
> only option for DPAA bus), the addresses of descriptors Rx'd are
> physical. These need to be converted into equivalent VA for rte_mbuf
> and other similar calls.
> 
> Using the rte_mem_virt2iova or rte_mem_virt2phy is expensive. This
> library is an attempt to reduce the overall cost associated with
> this translation.
> 
> A small table is maintained, containing continuous entries
> representing a continguous physical range. Each of these entries
> stores the equivalent VA, which is fed during mempool creation, or
> memory allocation/deallocation callbacks.
> 
> Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>
> ---
>  config/common_base                            |   5 +
>  config/common_linuxapp                        |   5 +
>  drivers/common/Makefile                       |   4 +
>  drivers/common/dpaax/Makefile                 |  31 ++
>  drivers/common/dpaax/dpaax_iova_table.c       | 461 ++++++++++++++++++
>  drivers/common/dpaax/dpaax_iova_table.h       | 103 ++++
>  drivers/common/dpaax/dpaax_logs.h             |  39 ++
>  drivers/common/dpaax/meson.build              |  12 +
>  .../common/dpaax/rte_common_dpaax_version.map |  11 +
>  drivers/common/meson.build                    |   2 +-
>  10 files changed, 672 insertions(+), 1 deletion(-)

I will add this change when applying:

 NXP buses
 M: Hemant Agrawal <hemant.agrawal@nxp.com>
 M: Shreyansh Jain <shreyansh.jain@nxp.com>
+F: drivers/common/dpaax/
 F: drivers/bus/dpaa/
 F: drivers/bus/fslmc/