[dpdk-dev] [PATCH] eal: add notice to make DPDK IOVA aware

[Olivier MATZ]

On Fri, Aug 04, 2017 at 10:55:25AM +0530, Hemant Agrawal wrote:
> On 8/4/2017 9:11 AM, santosh wrote:
> > 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 at caviumnetworks.com>
> > > ---
> > 
> > Acked-by: Santosh Shukla <santosh.shukla at caviumnetworks.com>
> > 
> > 
> Acked-by: Hemant Agrawal <hemant.agrawal at nxp.com>
> 

Acked-by: Olivier Matz <olivier.matz at 6wind.com>