Re: [SPDK] Netlist storage card

[Walker, Benjamin <benjamin.walker at intel.com>]

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On Sat, 2017-02-18 at 18:03 +1300, Dale Corlett wrote:
> Hi,
> 
> For DMA, do I need to give the card physical addresses or are the
> virtual addresses I get from spdk_malloc allowed due to the vfio
> virtualization?

Note that spdk_malloc returns the virtual address and the physical
address of the memory. Which one you need depends on your device. The
vast majority of PCI devices operate on physical/bus addresses. The
Netlist card should have defined this in its hardware specification.

> If I need to use physical address, should I use the spdk_vtophys
> function?
> I have tried using the spdk_vtophys function but I get the "could not
> find 2MB 0x*somenumber* in DPDK mem config" error, does this mean
> that I need to some how configure DPDK?

Again, spdk_malloc returned the physical address when you called it in
the phys_addr parameter.

> 
> Thanks,
> Dale

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