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

Hello Scott,


On 11/07/2014 02:19 AM, Scott Wood wrote:

On Fri, 2014-11-07 at 02:14 -0600, Emil Medve wrote:

quoted

Hello Scott,


On 11/07/2014 01:34 AM, Scott Wood wrote:

quoted

On Fri, 2014-11-07 at 01:31 -0600, Emil Medve wrote:

quoted

Hello Scott,


On 11/06/2014 03:49 PM, Scott Wood wrote:

quoted

On Wed, 2014-11-05 at 09:18 -0600, Emil Medve wrote:

quoted

+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.

I get that. As I said, the registers/bits are spread around in the CCSR
space of each block and not named excessively friendly. As such I hinted
for some search patterns to make it easier to find them. In order to
progress the review I'm willing to prepare a list. Just let me know

Could you point me to the section of the manual where this information
is -- friendly or otherwise?  I saw the QMan direct connect portal
registers.  I didn't see how to tell which <i> in DCPi_xxx goes with
which device.

For QMan look into section '6.3.10 Direct Connect Portals (DCPs)'. The
BMan DCP assignment is the same


Cheers,