[dpdk-dev] [PATCH v12 0/2] add IOVA=VA mode support

[<vattunuru@marvell.com>]

From: Vamsi Attunuru <vattunuru@marvell.com>

---
V12 Changes:
* Removed previously added `--legacy-kni` eal option.
* Removed previously added kni specific mempool create routines
and mempool populate routines.

This patch set(V12) is dependent on following patch set, since the mempool
related support to enable KNI in IOVA=VA mode is taken care in below
patchset.

   https://patchwork.dpdk.org/cover/62376/

V11 Changes:
* Added iova to kva address translation routines in kernel module to
make it work in iova=va mode which enables DPDK to create kni devices
on any kind of backed device/memory.
* Added ``--legacy-kni`` eal option to make existing KNI applications
work with DPDK 19.11 and later versions.
* Removed previously added pci device info from kni device info struct.
 
V10 Changes:
* Fixed function return code on failure when min_chunk_size > pg_sz.
* Marked new mempool populate routine as EXPERIMENTAL.
 
V9 Changes:
* Used rte_mempool_ops_calc_mem_size() instead of default handler in the
new mempool populate routine.
* Check min_chunk_size and return values.
* Removed ethdev_info memset to '0' and moved pci dev_info populate into
kni_dev_pci_addr_get() routine.
* Addressed misc. review comments.
 
V8 Changes:
* Remove default mempool populate() routine changes.
* Add kni app specific mempool create & free routines.
* Add new mempool populate routine to allocate page-aligned memzones
with page size to make sure all mempool objects reside on a page.
* Update release notes and map files.
 
V7 Changes:
* Removed previously proposed mempool flag and made those page
boundary checks default in mempool populate() except for the objects size
bigger than the size of page.
* Removed KNI example application related changes since pool related
requirement is taken care in mempool lib.
* All PCI dev related info is moved under rte_eal_iova_mode() == VA check.
* Added wrapper functions in KNI module to hide IOVA checks and make
address translation routines more readable.
* Updated IOVA mode checks that enforcing IOVA=PA mode when IOVA=VA
mode is enabled.
 
V6 Changes:
* Added new mempool flag to ensure mbuf memory is not scattered across
page boundaries.
* Added KNI kernel module required PCI device information.
* Modified KNI example application to create mempool with new mempool
flag.
 
V5 changes:
* Fixed build issue with 32b build
 
V4 changes:
* Fixed build issues with older kernel versions
* This approach will only work with kernel above 4.4.0
 
V3 Changes:
* Add new approach to work kni with IOVA=VA mode using
iommu_iova_to_phys API.

Vamsi Attunuru (2):
  kni: add IOVA=VA mode support
  kni: add IOVA=VA support in kernel module

 doc/guides/prog_guide/kernel_nic_interface.rst    |  9 ++++
 doc/guides/rel_notes/release_19_11.rst            |  5 ++
 kernel/linux/kni/compat.h                         | 15 ++++++
 kernel/linux/kni/kni_dev.h                        | 42 +++++++++++++++
 kernel/linux/kni/kni_misc.c                       | 39 ++++++++++----
 kernel/linux/kni/kni_net.c                        | 62 ++++++++++++++++++-----
 lib/librte_eal/linux/eal/eal.c                    | 29 ++++++-----
 lib/librte_eal/linux/eal/include/rte_kni_common.h |  1 +
 lib/librte_kni/rte_kni.c                          |  7 +--
 9 files changed, 170 insertions(+), 39 deletions(-)

-- 
2.8.4