Subject: Re: [PATCH v4 01/23] iidc: Introduce iidc.h

From: Jason Gunthorpe <[email-masked]>
Date: Wed, 7 Apr 2021 19:43:24 -0300

On Wed, Apr 07, 2021 at 08:58:49PM +0000, Saleem, Shiraz wrote:
> > Subject: Re: [PATCH v4 01/23] iidc: Introduce iidc.h
> > 
> > On Tue, Apr 06, 2021 at 04:01:03PM -0500, Shiraz Saleem wrote:
> > 
> > > +/* Following APIs are implemented by core PCI driver */ struct
> > > +iidc_core_ops {
> > > +	/* APIs to allocate resources such as VEB, VSI, Doorbell queues,
> > > +	 * completion queues, Tx/Rx queues, etc...
> > > +	 */
> > > +	int (*alloc_res)(struct iidc_core_dev_info *cdev_info,
> > > +			 struct iidc_res *res,
> > > +			 int partial_acceptable);
> > > +	int (*free_res)(struct iidc_core_dev_info *cdev_info,
> > > +			struct iidc_res *res);
> > > +
> > > +	int (*request_reset)(struct iidc_core_dev_info *cdev_info,
> > > +			     enum iidc_reset_type reset_type);
> > > +
> > > +	int (*update_vport_filter)(struct iidc_core_dev_info *cdev_info,
> > > +				   u16 vport_id, bool enable);
> > > +	int (*vc_send)(struct iidc_core_dev_info *cdev_info, u32 vf_id, u8 *msg,
> > > +		       u16 len);
> > > +};
> > 
> > What is this? There is only one implementation:
> > 
> > static const struct iidc_core_ops ops = {
> > 	.alloc_res			= ice_cdev_info_alloc_res,
> > 	.free_res			= ice_cdev_info_free_res,
> > 	.request_reset			= ice_cdev_info_request_reset,
> > 	.update_vport_filter		= ice_cdev_info_update_vsi_filter,
> > 	.vc_send			= ice_cdev_info_vc_send,
> > };
> > 
> > So export and call the functions directly.
> 
> No. Then we end up requiring ice to be loaded even when just want to
> use irdma with x722 [whose ethernet driver is "i40e"].

So what? What does it matter to load a few extra kb of modules?

If you had both drivers use the same ops interface you'd have an
argument.

Jason