[PATCH v1] bbdev: allow operation type enum for growth

[Chautru, Nicolas]

> From: Thomas Monjalon <thomas at monjalon.net>
> 
> This solution is what I proposed to the techboard some years ago, but the
> preference was to completely remove the MAX values.
> 

Thanks, good to see you had similar thought! I don't believe there is an actual recommendation captured in term of how to remove completely MAX values in that case below. I believe that this option is still compatible with the spirit of keeping AB future proof. 

> 
> 13/06/2022 20:24, Nicolas Chautru:
> > Updating the last enum for rte_bbdev_op_type to allow for enum
> > insertion.
> 
> Please explain that the reason is to keep ABI compatible, and you want to keep
> the MAX value for array needs.
> 
> > --- a/lib/bbdev/rte_bbdev.c
> > +++ b/lib/bbdev/rte_bbdev.c
> > @@ -1122,7 +1122,10 @@ struct rte_mempool *
> >  		"RTE_BBDEV_OP_TURBO_DEC",
> >  		"RTE_BBDEV_OP_TURBO_ENC",
> >  		"RTE_BBDEV_OP_LDPC_DEC",
> > -		"RTE_BBDEV_OP_LDPC_ENC",
> > +		"RTE_BBDEV_OP_RESERVED_1",
> > +		"RTE_BBDEV_OP_RESERVED_2",
> > +		"RTE_BBDEV_OP_RESERVED_3",
> > +		"RTE_BBDEV_OP_RESERVED_4",
> 
> As Stephen said, you should make sure that using these values with the API
> functions will lead to a clear and expected error.

Yes will do this. 

> 
> > @@ -748,7 +748,7 @@ enum rte_bbdev_op_type {
> >  	RTE_BBDEV_OP_TURBO_ENC,  /**< Turbo encode */
> >  	RTE_BBDEV_OP_LDPC_DEC,  /**< LDPC decode */
> >  	RTE_BBDEV_OP_LDPC_ENC,  /**< LDPC encode */
> > -	RTE_BBDEV_OP_TYPE_COUNT,  /**< Count of different op types */
> > +	RTE_BBDEV_OP_TYPE_COUNT = 8,  /**< Count of different op types */
> 
> You must update the comment to explain there may be a padding, it is not
> exactly the count.
> Maybe "MAX" is a better fit than "COUNT" in this case.
> 

OK