Re: [dpdk-dev] [PATCH v2 0/7] Removal of PCI bus ABIs

["Xia, Chenbo" <chenbo.xia@intel.com>]

Hi David & Changpeng,

> -----Original Message-----
> From: Liu, Changpeng <changpeng.liu@intel.com>
> Sent: Friday, October 8, 2021 3:45 PM
> To: David Marchand <david.marchand@redhat.com>; Harris, James R
> <james.r.harris@intel.com>
> Cc: Xia, Chenbo <chenbo.xia@intel.com>; dev@dpdk.org; ci@dpdk.org; Aaron
> Conole <aconole@redhat.com>; dpdklab <dpdklab@iol.unh.edu>; Zawadzki, Tomasz
> <tomasz.zawadzki@intel.com>; alexeymar@mellanox.com
> Subject: RE: [dpdk-dev] [PATCH v2 0/7] Removal of PCI bus ABIs
> 
> Thanks, I have worked with Chenbo to address this issue before.  After enable
> the `ALLOW_INTERNAL_API` option, it works now with SPDK.
> 
> Another issue raised by Jim Harris is that for distro packaged DPDK, since
> this option isn't enabled by default, this will not allow SPDK
> to use the distro packaged DPDK after this release.

I think for this problem, we have two options: enable driver sdk by default or
let OSV configure the option when building distros. I'm fine with either option.

@David, What do you think?

Thanks,
Chenbo

> 
> > -----Original Message-----
> > From: David Marchand <david.marchand@redhat.com>
> > Sent: Friday, October 8, 2021 3:08 PM
> > To: Liu, Changpeng <changpeng.liu@intel.com>
> > Cc: Xia, Chenbo <chenbo.xia@intel.com>; Harris, James R
> > <james.r.harris@intel.com>; dev@dpdk.org; ci@dpdk.org; Aaron Conole
> > <aconole@redhat.com>; dpdklab <dpdklab@iol.unh.edu>; Zawadzki, Tomasz
> > <tomasz.zawadzki@intel.com>; alexeymar@mellanox.com
> > Subject: Re: [dpdk-dev] [PATCH v2 0/7] Removal of PCI bus ABIs
> >
> > Hello,
> >
> > On Fri, Oct 8, 2021 at 8:15 AM Liu, Changpeng <changpeng.liu@intel.com>
> wrote:
> > >
> > > I tried the above DPDK patches, and got the following errors:
> > >
> > > pci.c:115:7: error: call to ‘rte_pci_read_config’ declared with attribute
> error:
> > Symbol is not public ABI
> > >   115 |  rc = rte_pci_read_config(dev->dev_handle, value, len, offset);
> > >       |       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > > pci.c: In function ‘cfg_write_rte’:
> > > pci.c:125:7: error: call to ‘rte_pci_write_config’ declared with attribute
> error:
> > Symbol is not public ABI
> > >   125 |  rc = rte_pci_write_config(dev->dev_handle, value, len, offset);
> > >       |       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > > pci.c: In function ‘register_rte_driver’:
> > > pci.c:375:2: error: call to ‘rte_pci_register’ declared with attribute
> error:
> > Symbol is not public ABI
> > >   375 |  rte_pci_register(&driver->driver);
> >
> > I should have got this warning... but compilation passed fine for me.
> > Happy you tested it.
> >
> > >
> > > We may use the new added API to replace rte_pci_write_config and
> > rte_pci_read_config, but SPDK
> > > do require rte_pci_register().
> >
> > Since SPDK has a PCI driver, you'll need to compile code that calls
> > those PCI driver internal API with ALLOW_INTERNAL_API defined.
> > You can probably add a #define ALLOW_INTERNAL_API first thing (it's
> > important to have it defined before including any dpdk header) in
> > pci.c
> >
> > Another option, is to add it to lib/env_dpdk/env.mk:ENV_CFLAGS =
> > $(DPDK_INC) -DALLOW_EXPERIMENTAL_API.
> >
> > Can someone from SPDK take over this and sync with Chenbo?
> >
> >
> > Thanks.
> >
> > --
> > David Marchand