[dpdk-dev] [PATCH 00/15] Make VFIO support independent on PCI

[Jan Viktorin <viktorin@rehivetech.com>]

Hello,

here follows several patchs extracting the general VFIO code out of the
PCI + VFIO code base. Usually, it's just move and rename of functions.
The most complicated ones are:

* eal/linux: extract setup logic out of pci_vfio_map_resource

  - separation of some setup code out of the pci_vfio_map_resource
    (which is otherwise quite PCI-speicific)
  - it is required by the following one

* eal/linux: move global vfio_cfg to eal_vfio.c

  - moving the vfio_cfg global variable out of the eal_pci_vfio together with
    the functions working with this variable

Some patchs make just temporary changes to avoid breakages throughout the
patch set (dma mapping).

I am not sure, how exactly is the mp_sync code intended to work. Should there
be just a single socket connection (no matter how many bus-systems we support)?
I assume it works this way so I've generalized the eal_pci_vfio_mp_sync.

The vfio initialization is moved out of the rte_eal_pci_init into EAL.

The code is now prepared for adding of other infrastructures such as the SoC
that I've introduced in [1]. I've partially done this in my workspace.

The VFIO code is quite complex and written in a spaghetti style so a more
maintainance would be helpful. I've did my best to preserve the semantics
(I hope) to be 100 % the same as before.

Important: I didn't test whether it's working as I have no VFIO-enabled machine
at the moment and the SoC infra is not so ready yet.

[1] http://comments.gmane.org/gmane.comp.networking.dpdk.devel/30913

Regards
Jan

---

Jan Viktorin (15):
  vfio: fix include of eal_private.h to be local
  vfio: move VFIO-specific stuff to eal_vfio.h
  vfio: move common vfio constants to eal_vfio.h
  vfio: move vfio_iommu_type and dma_map functions to eal_vfio
  vfio: generalize pci_vfio_set_iommu_type
  vfio: generalize pci_vfio_has_supported_extensions
  vfio: move vfio-specific SOCKET_* constants
  vfio: generalize pci_vfio_get_container_fd
  vfio: generalize pci_vfio_get_group_no
  vfio: extract setup logic out of pci_vfio_map_resource
  vfio: move global vfio_cfg to eal_vfio.c
  vfio: make vfio_*_dma_map and iommu_types private
  vfio: rename and generalize eal_pci_vfio_mp_sync
  vfio: initialize vfio out of the PCI subsystem
  vfio: change VFIO init to be extendable

 lib/librte_eal/linuxapp/eal/Makefile               |   5 +-
 lib/librte_eal/linuxapp/eal/eal.c                  |  33 ++
 lib/librte_eal/linuxapp/eal/eal_pci.c              |  17 +-
 lib/librte_eal/linuxapp/eal/eal_pci_init.h         |  41 --
 lib/librte_eal/linuxapp/eal/eal_pci_vfio.c         | 517 +-------------------
 lib/librte_eal/linuxapp/eal/eal_vfio.c             | 528 +++++++++++++++++++++
 lib/librte_eal/linuxapp/eal/eal_vfio.h             |  94 ++++
 .../{eal_pci_vfio_mp_sync.c => eal_vfio_mp_sync.c} |  12 +-
 8 files changed, 672 insertions(+), 575 deletions(-)
 create mode 100644 lib/librte_eal/linuxapp/eal/eal_vfio.c
 rename lib/librte_eal/linuxapp/eal/{eal_pci_vfio_mp_sync.c => eal_vfio_mp_sync.c} (97%)

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2.8.0