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doc: announce ABI change for device parameters

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The PCI and virtual bus are planned to be moved to the generic
drivers/bus directory in v17.08. For this change to be possible, the EAL
must be made completely independent.

The rte_devargs structure currently holds device representation internal
to those two busses. It must be made generic before this work can be
completed.

Instead of using either a driver name for a vdev or a PCI address for a
PCI device, a devargs structure will have to be able to describe any
possible device on all busses, without introducing dependencies on
any bus-specific device representation. This will break the ABI for this
structure.

Additionally, an evolution will occur regarding the device parsing
from the command-line. A user must be able to set which bus will handle
which device, and this setting is integral to the definition of a
device.

The format has not yet been formally defined, but a proposition will
follow soon for a new command line parameter format for all devices.

Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Acked-by: David Marchand <david.marchand@6wind.com>
Acked-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Acked-by: Thomas Monjalon <thomas@monjalon.net>
This commit is contained in:
Gaetan Rivet 2017-05-10 17:46:10 +02:00 committed by Thomas Monjalon
parent 757c74baf3
commit 2ee10c8a56
1 changed files with 7 additions and 0 deletions
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7
doc/guides/rel_notes/deprecation.rst
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@ -16,6 +16,13 @@ Deprecation Notices
- ``rte_set_log_type``, replaced by ``rte_log_set_level``
- ``rte_get_log_type``, replaced by ``rte_log_get_level``
* devargs: An ABI change is planned for 17.08 for the structure ``rte_devargs``.
The current version is dependent on bus-specific device identifier, which will
be made generic and abstracted, in order to make the EAL bus-agnostic.
Accompanying this evolution, device command line parameters will thus support
explicit bus definition in a device declaration.
* igb_uio: iomem mapping and sysfs files created for iomem and ioport in
igb_uio will be removed, because we are able to detect these from what Linux
has exposed, like the way we have done with uio-pci-generic. This change