The IOAT "ring" is actually just a circular linked list of descriptors;
the descriptors do not need to be in a single physically contiguous
region. This can be accomodated by calling spdk_vtophys() on each
descriptor rather than assuming they are all in a single contiguous
region.
Also store the physical address of each descriptor in its associated
software descriptor context to avoid the need to call spdk_vtophys()
during runtime.
Change-Id: Ic8636bbc61deb496a0c6d0ea56b75d298f5f426c
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-on: https://review.gerrithub.io/417782
Reviewed-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
104fa6e722