From: Stephen Hemminger <stephen@networkplumber.org>
To: Gaetan Rivet <gaetan.rivet@6wind.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v2] devargs: announce ABI change for device parameters
Date: Wed, 10 May 2017 10:54:07 -0700 [thread overview]
Message-ID: <20170510105407.0377a27c@xeon-e3> (raw)
In-Reply-To: <1bb0b4a6403e42157ef983f0ee63320ce87a3996.1494430911.git.gaetan.rivet@6wind.com>
On Wed, 10 May 2017 17:46:10 +0200
Gaetan Rivet <gaetan.rivet@6wind.com> wrote:
> 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>
I understand why having a union of all bus types is an issues since it
means that if a new bus type (like VMBUS with GUID) has a bigger value
then the existing representation would break.
Perhaps give an example of what the new model would look like?
next prev parent reply other threads:[~2017-05-10 17:54 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-10 12:52 [dpdk-dev] [PATCH 1/2] pci: deprecate PCI detach Gaetan Rivet
2017-05-10 12:52 ` [dpdk-dev] [PATCH 2/2] devargs: announce ABI change for device parameters Gaetan Rivet
2017-05-10 13:04 ` Thomas Monjalon
2017-05-10 13:02 ` [dpdk-dev] [PATCH 1/2] pci: deprecate PCI detach Thomas Monjalon
2017-05-10 15:48 ` Gaëtan Rivet
2017-05-10 15:46 ` [dpdk-dev] [PATCH v2] devargs: announce ABI change for device parameters Gaetan Rivet
2017-05-10 17:28 ` Jerin Jacob
2017-05-10 17:54 ` Stephen Hemminger [this message]
2017-05-10 21:59 ` Gaëtan Rivet
2017-05-10 18:50 ` David Marchand
2017-05-10 19:54 ` Maxime Coquelin
2017-05-10 23:14 ` Thomas Monjalon
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