Re: [PATCH v3 01/16] nvmet: report ioccsz and iorcsz for disc ctrl

[Daniel Wagner]

On Tue, Dec 19, 2023 at 08:24:58AM +0100, Hannes Reinecke wrote:
> > +	 * Disable in-capsule data for Metadata capable controllers.
> > +	 */
> > +	cmd_capsule_size = sizeof(struct nvme_command);
> > +	if (!ctrl->pi_support)
> > +		cmd_capsule_size += req->port->inline_data_size;
> > +	id->ioccsz = cpu_to_le32(cmd_capsule_size / 16);
> 
> Why the division by 16?

The unit size is 16 bytes:

  I/O Queue Command Capsule Supported Size (IOCCSZ): This field defines the
  maximum I/O command capsule size in 16 byte units.