[PATCH] vfio: add get device info API

[Ye, MingjinX]

Hi Nipun and all,

Introducing new rte_vfio_get_device_info api in EAL to support getting information about devices. 
Could you provide some suggestions?

Thanks,
Mingjin

> -----Original Message-----
> From: Stephen Hemminger <stephen at networkplumber.org>
> Sent: Wednesday, November 15, 2023 8:12 AM
> To: Ye, MingjinX <mingjinx.ye at intel.com>
> Cc: dev at dpdk.org; Yang, Qiming <qiming.yang at intel.com>;
> stable at dpdk.org; Burakov, Anatoly <anatoly.burakov at intel.com>
> Subject: Re: [PATCH] vfio: add get device info API
> 
> On Tue, 14 Nov 2023 10:48:16 +0000
> Mingjin Ye <mingjinx.ye at intel.com> wrote:
> 
> > +/**
> > + * Get device information
> > + *
> > + * This function is only relevant to linux and will return
> > + * an error on BSD.
> > + *
> > + * @param sysfs_base
> > + *   sysfs path prefix.
> > + *
> > + * @param dev_addr
> > + *   device location.
> > + *
> > + * @param vfio_dev_fd
> > + *   VFIO fd.
> > + *
> > + * @param device_info
> > + *   Device information.
> > + *
> > + * @return
> > + *   0 on success.
> > + *   <0 on failure.
> > + */
> > +int
> > +rte_vfio_get_device_info(const char *sysfs_base, const char *dev_addr,
> > +			int *vfio_dev_fd, struct vfio_device_info
> *device_info);
> 
> New api's must be experimental.
> Or is this just internal?
New api is experimental.