linux-kernel - Re: [PATCH v3 3/5] PCI: dwc: Pass the eDMA mapping format flag directly from glue drivers

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Message-ID: <20240304061900.GF2647@thinkpad>
Date: Mon, 4 Mar 2024 11:49:00 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Frank Li <Frank.li@....com>
Cc: Jingoo Han <jingoohan1@...il.com>,
	Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Marek Vasut <marek.vasut+renesas@...il.com>,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Serge Semin <fancer.lancer@...il.com>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, mhi@...ts.linux.dev,
	Siddharth Vadapalli <s-vadapalli@...com>
Subject: Re: [PATCH v3 3/5] PCI: dwc: Pass the eDMA mapping format flag
 directly from glue drivers

On Tue, Feb 27, 2024 at 12:38:52PM -0500, Frank Li wrote:
> On Tue, Feb 27, 2024 at 01:15:33PM +0530, Manivannan Sadhasivam wrote:
> > On Mon, Feb 26, 2024 at 11:30:13AM -0500, Frank Li wrote:
> > > On Mon, Feb 26, 2024 at 05:07:28PM +0530, Manivannan Sadhasivam wrote:
> > > > Instead of maintaining a separate capability for glue drivers that cannot
> > > > support auto detection of the eDMA mapping format, let's pass the mapping
> > > > format directly from them.
> > > 
> > > Sorry, what's mapping? is it register address layout?
> > > 
> > 
> > Memory map containing the register layout for iATU, DMA etc...
> 
> the world 'map' is too general. can you use 'register map' at least at one
> place? There are bunch 'map' related DMA, such iommu map, stream id map, 
> memory page map. The reader need go though whole thread to figure out it is
> register map. 
> 

This is what used from the start and also what "mf" corresponds to. So I had to
use the same terminology.

- Mani

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