linux-kernel - RE: [PATCH 4/6] Add multi mport support.

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Date:	Thu, 31 Jan 2008 14:30:13 +0800
From:	"Zhang Wei" <Wei.Zhang@...escale.com>
To:	"Kumar Gala" <galak@...nel.crashing.org>
Cc:	<linuxppc-dev@...abs.org>, <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 4/6] Add multi mport support.

 

> -----Original Message-----
> From: Kumar Gala [mailto:galak@...nel.crashing.org] 
> 
> On Jan 31, 2008, at 12:15 AM, Kumar Gala wrote:
> 
> >
> > On Jan 30, 2008, at 11:57 PM, Zhang Wei wrote:
> >
> >>
> >>
> >>> -----Original Message-----
> >>> From: Kumar Gala [mailto:galak@...nel.crashing.org]
> >>>
> >>> On Jan 30, 2008, at 4:30 AM, Zhang Wei wrote:
> >>>
> >>>> Change lots of static variable to mport private. And add
> >>> mport to some
> >>>> function declaration.
> >>>
> >>> Can you explain this patch further.  Its not clear 
> exactly from this
> >>> commit message why we are doing this.
> >>>
> >>> - k
> >>
> >> Sorry about I have a little hurry about it.
> >>
> >> The original RapidIO driver suppose there is only one mpc85xx RIO
> >> controller
> >> in system. So, some data structures are defined as mpc85xx_rio  
> >> global,
> >> such as 'regs_win', 'dbell_ring', 'msg_tx_ring'. Now, I 
> changed them
> >> to
> >> mport's private members. And you can define multi RIO 
> OF-nodes in dts
> >> file
> >> for multi RapidIO controller in one processor, such as PCI/PCI-Ex  
> >> host
> >> controllers
> >> in Freescale's silicon. And the mport operation function 
> declaration
> >> should be changed
> >> to know which RapidIO controller is target.
> >
> > thanks, this makes a lot of sense and now reviewing the patch will
> > make some sense to me :)
> 
> when we have multiple ports are the device IDs on the ports intended  
> to be unique only to a port or unique across all ports?
> 
I consider each RIO controller will has its own network, the device IDs
should be
unique only in its port network.

Cheers!
Wei
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