RE: [EXTERNAL] Re: [PATCH v2] rawdev: add API to get device from index

[Akhil Goyal <gakhil@marvell.com>]

> > diff --git a/lib/rawdev/rte_rawdev_pmd.h b/lib/rawdev/rte_rawdev_pmd.h
> > index 22b406444d..8339122348 100644
> > --- a/lib/rawdev/rte_rawdev_pmd.h
> > +++ b/lib/rawdev/rte_rawdev_pmd.h
> > @@ -102,6 +102,30 @@ rte_rawdev_pmd_get_named_dev(const char *name)
> >         return NULL;
> >  }
> >
> > +/**
> > + * Get the rte_rawdev structure device pointer for given device ID.
> > + *
> > + * @param dev_id
> > + *   raw device index.
> > + *
> > + * @return
> > + *   - The rte_rawdev structure pointer for the given device ID.
> > + */
> > +static inline struct rte_rawdev *
> > +rte_rawdev_pmd_get_dev(uint8_t dev_id)
> > +{
> > +       struct rte_rawdev *dev;
> > +
> > +       if (dev_id >= RTE_RAWDEV_MAX_DEVS)
> > +               return NULL;
> > +
> > +       dev = &rte_rawdevs[dev_id];
> > +       if (dev->attached == RTE_RAWDEV_ATTACHED)
> > +               return dev;
> > +
> > +       return NULL;
> > +}
> > +
> 
> This seems simple enough and we have the same kind of helper in other
> device class libraries.
> But I would like to better understand the driver API that requires this.
> 
This is being used in the new cnxk rvu_lf driver.
https://patches.dpdk.org/project/dpdk/cover/20241008105415.1026962-1-gakhil@marvell.com/