[dpdk-dev] [PATCH v2 0/5] add device removal event

Gaetan Rivet gaetan.rivet at 6wind.com
Tue Apr 18 14:17:37 CEST 2017

This new event represents the sudden removal of a device from its bus.
The underlying resources exposed by the bus are expected not to be available
anymore. The application should thus be able to react and possibly clean up
related resources that it reserved for the removed device.

This event is different from the current hotplug API available in the DPDK
for two reasons:

1. It is a reactive design: the application reacts to a device that has been
   removed instead of removing a device from its pool.

2. The event itself is going further than the current detaching of a device
   from a DPDK application. If the bus is a hardware one, it is expected of the
   underlying resources to not be available anymore.

This series adds a new event type to ethdev and implements it in mlx4.
Testpmd is also updated to report all asynchronous ethdev events including this
one for testing purposes and as a practical usage example.

This series depends on the series titled
[PATCH 1/2] net/mlx4: split the definitions to the header file

v1 --> v2:
  * integrated the series with the new PCI rte_bus implementation.

  I planned on working out a more generic implementation of the RMV event for
  the v17.05, however while writing it I found that I had to evolve the support
  of interrupts in the PCI rte_bus, which did not seem wise at this point of the
  release cycle.

  I consider that this event should be generalized along the LSC event, going from
  pure PCI events to generic rte_bus events, given that they can be relevant to other
  busses (vdev at least). I would reserve this evolution for future release however,
  once a real discussion has taken place.

Gaetan Rivet (5):
  ethdev: introduce device removal event
  net/mlx4: device removal event support
  app/testpmd: generic event handler
  app/testpmd: request link status interrupt
  app/testpmd: request device removal interrupt

 app/test-pmd/parameters.c                       |   8 +
 app/test-pmd/testpmd.c                          | 103 ++++++++++
 app/test-pmd/testpmd.h                          |   2 +
 doc/guides/nics/features/default.ini            |   1 +
 doc/guides/nics/features/mlx4.ini               |   1 +
 doc/guides/prog_guide/env_abstraction_layer.rst |  21 +-
 drivers/net/mlx4/mlx4.c                         | 258 ++++++++++++++++++++----
 drivers/net/mlx4/mlx4.h                         |   1 +
 lib/librte_eal/common/include/rte_pci.h         |   2 +
 lib/librte_ether/rte_ethdev.c                   |  11 +-
 lib/librte_ether/rte_ethdev.h                   |   9 +-
 lib/librte_ether/rte_ethdev_pci.h               |   2 +
 12 files changed, 375 insertions(+), 44 deletions(-)


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