From: santosh <santosh.shukla@caviumnetworks.com>
To: Jerin Jacob <jerin.jacob@caviumnetworks.com>, dev@dpdk.org
Cc: thomas@monjalon.net, olivier.matz@6wind.com,
stephen@networkplumber.org, hemant.agrawal@nxp.com,
bruce.richardson@intel.com, shreyansh.jain@nxp.com,
gaetan.rivet@6wind.com, sergio.gonzalez.monroy@intel.com,
anatoly.burakov@intel.com
Subject: Re: [dpdk-dev] [PATCH] eal: add notice to make DPDK IOVA aware
Date: Fri, 4 Aug 2017 09:11:20 +0530 [thread overview]
Message-ID: <2e51e54f-a405-3e5a-7a20-d8e97f75b5ad@caviumnetworks.com> (raw)
In-Reply-To: <20170711100141.3950-1-jerin.jacob@caviumnetworks.com>
On Tuesday 11 July 2017 03:31 PM, Jerin Jacob wrote:
> 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>
next prev parent reply other threads:[~2017-08-04 3:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-11 10:01 Jerin Jacob
2017-07-21 6:41 ` santosh
2017-08-04 3:41 ` santosh [this message]
2017-08-04 5:25 ` Hemant Agrawal
2017-08-06 21:22 ` Olivier MATZ
2017-08-08 0:04 ` Thomas Monjalon
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