Subject: Re: [PATCH v3 1/4] dt/bindings: Introduce the FSL QorIQ DPAA BMan

From: Scott Wood <[email-masked]>
Date: Fri, 7 Nov 2014 01:34:25 -0600

On Fri, 2014-11-07 at 01:31 -0600, Emil Medve wrote:
> Hello Scott,
> 
> 
> On 11/06/2014 03:49 PM, Scott Wood wrote:
> > On Wed, 2014-11-05 at 09:18 -0600, Emil Medve wrote:
> >> +Devices connected to a BMan instance via Direct Connect Portals (DCP) must link
> >> +to the respective BMan instance
> >> +
> >> +- fsl,bman
> >> +	Usage:		Required
> >> +	Value type:	<prop-encoded-array>
> >> +	Description:	List of phandle and DCP index pairs, to the BMan instance
> >> +			to which this device is connected via the DCP
> > 
> > Does software need the DCP index (though for QMan there do seem to be a
> > few registers associated with each DCP)?  Where can I find that info in
> > the manual?
> 
> The DCP index helps describe the topology of the devices connected to
> the B/QMan. One might be tempted to use some address to reference said
> DCP, unfortunately the pertinent registers/bits for said DCP(s) are not
> into a compact region. Look at the CCSR memory map for B/QMan
> 
> In the QMan case things are marginally better. For each hardware portal
> there are a handful of (vaguely named *DCx*, *DCPx* or *DCP*) registers
> (configuration, performance monitoring and debugging). However, still
> registers and bits spread here and there
> 
> In the BMan case things are a bit worse as the registers names are less
> friendly and still spread around
> 
> Do you need specific names/offsets?

My question about the manual wasn't rhetorical -- I tried to find this
information and couldn't.

-Scott