[dpdk-dev] [PATCH v11 0/4] kni: add IOVA=VA mode support

[<vattunuru@marvell.com>]

From: Vamsi Attunuru <vattunuru@marvell.com>

---
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 (4):
  mempool: populate mempool with the page sized chunks
  eal: add legacy kni option
  kni: add IOVA=VA support
  kni: add IOVA=VA support in kernel module

 doc/guides/prog_guide/kernel_nic_interface.rst    | 26 +++++++++
 doc/guides/rel_notes/release_19_11.rst            | 17 ++++++
 examples/kni/main.c                               |  6 +-
 kernel/linux/kni/compat.h                         |  4 ++
 kernel/linux/kni/kni_dev.h                        | 31 ++++++++++
 kernel/linux/kni/kni_misc.c                       | 39 ++++++++++---
 kernel/linux/kni/kni_net.c                        | 58 ++++++++++++++-----
 lib/librte_eal/common/eal_common_options.c        |  5 ++
 lib/librte_eal/common/eal_internal_cfg.h          |  2 +
 lib/librte_eal/common/eal_options.h               |  2 +
 lib/librte_eal/linux/eal/eal.c                    | 40 +++++++++----
 lib/librte_eal/linux/eal/include/rte_kni_common.h |  1 +
 lib/librte_kni/Makefile                           |  1 +
 lib/librte_kni/meson.build                        |  1 +
 lib/librte_kni/rte_kni.c                          | 67 ++++++++++++++++++++--
 lib/librte_kni/rte_kni.h                          | 48 ++++++++++++++++
 lib/librte_kni/rte_kni_version.map                |  3 +
 lib/librte_mempool/rte_mempool.c                  | 69 +++++++++++++++++++++++
 lib/librte_mempool/rte_mempool.h                  | 20 +++++++
 lib/librte_mempool/rte_mempool_version.map        |  2 +
 20 files changed, 402 insertions(+), 40 deletions(-)

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2.8.4