Re: [dpdk-dev] [PATCH] doc: announce removal of ABIs in PCI bus driver

[Bruce Richardson <bruce.richardson@intel.com>]

On Mon, Jul 26, 2021 at 05:56:17AM +0000, Xia, Chenbo wrote:
> Hi, Ferruh
> 
> > -----Original Message-----
> > From: Yigit, Ferruh <ferruh.yigit@intel.com>
> > Sent: Friday, July 23, 2021 8:47 PM
> > To: Xia, Chenbo <chenbo.xia@intel.com>; dev@dpdk.org; thomas@monjalon.net
> > Cc: mdr@ashroe.eu; nhorman@tuxdriver.com; david.marchand@redhat.com
> > Subject: Re: [dpdk-dev] [PATCH] doc: announce removal of ABIs in PCI bus
> > driver
> > 
> > On 7/23/2021 8:39 AM, Xia, Chenbo wrote:
> > > Hi,
> > >
> > > A gentle ping for comments..
> > >
> > >> -----Original Message-----
> > >> From: dev <dev-bounces@dpdk.org> On Behalf Of Chenbo Xia
> > >> Sent: Tuesday, June 1, 2021 4:42 PM
> > >> To: dev@dpdk.org; thomas@monjalon.net
> > >> Cc: mdr@ashroe.eu; nhorman@tuxdriver.com
> > >> Subject: [dpdk-dev] [PATCH] doc: announce removal of ABIs in PCI bus
> > driver
> > >>
> > >> All ABIs in PCI bus driver, which are defined in rte_buc_pci.h,
> > >> will be removed and the header will be made internal.
> > >>
> > >> Signed-off-by: Chenbo Xia <chenbo.xia@intel.com>
> > >> ---
> > >>  doc/guides/rel_notes/deprecation.rst | 5 +++++
> > >>  1 file changed, 5 insertions(+)
> > >>
> > >> diff --git a/doc/guides/rel_notes/deprecation.rst
> > >> b/doc/guides/rel_notes/deprecation.rst
> > >> index 9584d6bfd7..b01f46c62e 100644
> > >> --- a/doc/guides/rel_notes/deprecation.rst
> > >> +++ b/doc/guides/rel_notes/deprecation.rst
> > >> @@ -147,3 +147,8 @@ Deprecation Notices
> > >>  * cmdline: ``cmdline`` structure will be made opaque to hide platform-
> > >> specific
> > >>    content. On Linux and FreeBSD, supported prior to DPDK 20.11,
> > >>    original structure will be kept until DPDK 21.11.
> > >> +
> > >> +* pci: To reduce unnecessary ABIs exposed by DPDK bus driver,
> > "rte_bus_pci.h"
> > >> +  will be made internal in 21.11 and macros/data structures/functions
> > defined
> > >> +  in the header will not be considered as ABI anymore. This change is
> > >> inspired
> > >> +  by the RFC
> > https://patchwork.dpdk.org/project/dpdk/list/?series=17176.
> > >
> > > I see there's some ABI improvement work on-going and I think it could be
> > part of
> > > the work. If it makes sense to you, I'd like some ACKs.
> > >
> > 
> > Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>
> > 
> > I am for reducing the public ABI as much as possible. How big will the
> > change
> > be? Is the 'rte_bus_pci.h' used other than './drivers/bus/pci/'?
> 
> I don't see big change here. And I am not sure if I understand your second
> question. The rte_bus_pci.h will still be used by drivers (maybe remove the
> rte prefix and change the file name).
> 
The file itself will still be exported in some cases, where the end-user
has their own drivers which need to be compiled, so I'd recommend keeping
the rte_ prefix. However, I think making all bus APIs internal-only to DPDK
is a good idea.

Acked-by: Bruce Richardson <bruce.richardson@intel.com>