[dpdk-dev] [PATCH v4 3/6] bus: introduce device level DMA memory mapping

[Thomas Monjalon]

13/03/2019 12:12, Shahaf Shuler:
> From: Thomas Monjalon <thomas at monjalon.net>
> > 10/03/2019 09:28, Shahaf Shuler:
> > > For PCI bus devices, the pci driver can expose its own map and unmap
> > > functions to be used for the mapping. In case the driver doesn't
> > > provide any, the memory will be mapped, if possible, to IOMMU through
> > VFIO APIs.
> > >
> > > Application usage with those APIs is quite simple:
> > > * allocate memory
> > > * call rte_extmem_register on the memory chunk.
> > > * take a device, and query its rte_device.
> > > * call the device specific mapping function for this device.
> > 
> > Should we make it documented somewhere?
> 
> The full flow to work w/ external memory is documented at doc/guides/prog_guide/env_abstraction_layer.rst , Subchapter "Support for Externally Allocated Memory.
> The last commit in series update the right API to use.

OK, then I will move this doc update in this patch.