[PATCH v2 0/9] pci cleanup and blacklist rework

[David Marchand <david.marchand@6wind.com>]

Before 2.2.0 release, while preparing for more changes in eal (and fixing
a problem reported by Roger M. [1]), I came up with this (part of) patchset
that tries to make the pci code more compact and easier to read.

I ended up introducing some hooks in the pci layer to customize pci
blacklist / whitelist handling and make it possible to automatically
bind / unbind pci devices to igb_uio (or equivalent) when attaching
a device.

I am still not really happy:
- the pci blacklist / whitelist makes me think we should let the
  application tell eal which resources to use and get rid of the
  unconditional pci scan code, which means removing rte_eal_pci_probe()
  from rte_eal_init(), and remove rte_eal_dev_init() for vdevs,
- the more I look at this, the more I think automatic bind / unbind for
  pci devices should be called from the pmd context. The drivers know best
  what they require and what they want to do with the resources passed by
  the eal (see the drv_flags / RTE_KDRV_NONE / rte_eal_pci_map_device stuff
  for virtio pmd).
  This behaviour would still be optional, on a per-device basis.

So, I think that these hooks are not that good of an idea and I kept
them private for now, but anyway, sending this for comments.


Changes since v1:
- split the initial patchset. This current patchset now depends on
  [2] sent separately which should be applied first,
- introduced hooks in pci common code,
- implemented automatic bind / unbind for "uio" pci devices


[1] http://dpdk.org/ml/archives/dev/2015-November/028140.html
[2] http://dpdk.org/ml/archives/dev/2016-January/032387.html

-- 
David Marchand

David Marchand (9):
  pci: add internal device list helpers
  pci/linux: minor cleanup
  pci/linux: rework sysfs parsing for driver
  pci: factorize probe/detach code
  pci: cosmetic change
  pci: factorize driver search
  pci: remove driver lookup from detach
  pci: implement blacklist using a hook
  pci: implement automatic bind/unbind

 lib/librte_eal/bsdapp/eal/eal_pci.c        |  59 ++--
 lib/librte_eal/common/eal_common_options.c |   8 +
 lib/librte_eal/common/eal_common_pci.c     | 438 ++++++++++++++++++-----------
 lib/librte_eal/common/eal_options.h        |   2 +
 lib/librte_eal/common/eal_private.h        |  64 +++++
 lib/librte_eal/common/include/rte_pci.h    |   7 +-
 lib/librte_eal/linuxapp/eal/eal_pci.c      | 301 ++++++++++++++++----
 7 files changed, 627 insertions(+), 252 deletions(-)

-- 
1.9.1