From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas@monjalon.net>
Subject: Re: [PATCH] eal: add notice to make DPDK IOVA aware
Date: Tue, 08 Aug 2017 02:04:38 +0200
Message-ID: <1559406.upfG6sTndH@xps>
References: <20170711100141.3950-1-jerin.jacob@caviumnetworks.com>
 <532ed585-cf2a-aeaf-c7e5-cca29a33925c@nxp.com>
 <20170806212231.ar5l4qt5bxwku2mu@glumotte.dev.6wind.com>
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Cc: dev@dpdk.org, Olivier MATZ <olivier.matz@6wind.com>,
 Hemant Agrawal <hemant.agrawal@nxp.com>,
 santosh <santosh.shukla@caviumnetworks.com>, stephen@networkplumber.org,
 bruce.richardson@intel.com, shreyansh.jain@nxp.com, gaetan.rivet@6wind.com,
 sergio.gonzalez.monroy@intel.com, anatoly.burakov@intel.com
To: Jerin Jacob <jerin.jacob@caviumnetworks.com>
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> > > > When we run DPDK on guest or VFIO mode on host,
> > > > the dpdk library or device will not be directly accessing
> > > > the physical address. Instead, the device does go through
> > > > an IO address translation memory management unit. On x86,
> > > > we call it as IOMMU and on ARM as SMMU.
> > > > 
> > > > More details:
> > > > http://osidays.com/osidays/wp-content/uploads/2014/12/Final_OSI2014_IOMMU_DetailedView_Sanil_Anurup.pdf
> > > > 
> > > > Based on discussion in the following thread
> > > > http://dpdk.org/ml/archives/dev/2017-July/070850.html
> > > > 
> > > > We would like to change reference to physical address to more
> > > > appropriate name as with IOMMU/SMMU with
> > > > the device won't be dealing directly with the physical address.
> > > > 
> > > > An ABI change is planned for 17.11 to change following
> > > > data structure or functions to more appropriate name.
> > > > Currently planned to change it iova as instead of phys
> > > > 
> > > > Please note: The change will be only for the name and
> > > > functional aspects of the API will remain same.
> > > > 
> > > > Following functions/data structures name may change.
> > > > This list is based on v17.05-rc1. It may change based on v17.11 code base.
> > > > 
> > > > 
> > > > typedef:
> > > > phys_addr_t
> > > > 
> > > > structures:
> > > > 
> > > > struct rte_memseg::phys_addr
> > > > struct rte_mbuf::buf_physaddr
> > > > 
> > > > functions:
> > > > rte_mempool_populate_phys()
> > > > rte_mempool_populate_phys_tab()
> > > > rte_eal_using_phys_addrs()
> > > > rte_mem_virt2phy()
> > > > rte_dump_physmem_layout()
> > > > rte_eal_get_physmem_layout()
> > > > rte_eal_get_physmem_size()
> > > > rte_malloc_virt2phy()
> > > > rte_mem_phy2mch()
> > > > 
> > > > Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
> > > 
> > > Acked-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>
> > > 
> > Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>
> 
> Acked-by: Olivier Matz <olivier.matz@6wind.com>

Acked-by: Thomas Monjalon <thomas@monjalon.net>

The name will probably be discussed.
Applied, thanks