[SPDK] Re: sysfs-pci and SPDK IOAT

Hi,

we change to use SPDK pci APIs to access NTB.

After spdk_pci_device_map_bar(), it can get the "mapped address" for accessing remote memory.

It's okay that using memcpy to copy "data" to "mapped address":
   memcpy(mapped_addr,  data_buf, size);

However, when using SPDK IOAT:
   spdk_ioat_build_copy(ioat, cb_arg, cb_fn, mapped_addr, data_buf, size);
 
    It will fail to  translate mapped_addr by spdk_vtophys().