netdev - Re: [PATCH v5 3/9] net: stmmac: Add Loongson DWGMAC definitions

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Message-ID: <7dde9b88-8dc5-4a35-a6e3-c56cf673e66d@lunn.ch>
Date: Fri, 24 Nov 2023 15:51:08 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Yanteng Si <siyanteng@...ngson.cn>
Cc: hkallweit1@...il.com, peppe.cavallaro@...com,
	alexandre.torgue@...s.st.com, joabreu@...opsys.com,
	fancer.lancer@...il.com, Jose.Abreu@...opsys.com,
	chenhuacai@...ngson.cn, linux@...linux.org.uk, dongbiao@...ngson.cn,
	guyinggang@...ngson.cn, netdev@...r.kernel.org,
	loongarch@...ts.linux.dev, chris.chenfeiyang@...il.com
Subject: Re: [PATCH v5 3/9] net: stmmac: Add Loongson DWGMAC definitions

> In general, we split one into two.
> 
> the details are as follows：
> 
> DMA_INTR_ENA_NIE = DMA_INTR_ENA_NIE_LOONGSON= DMA_INTR_ENA_TX_NIE +
> DMA_INTR_ENA_RX_NIE

What does the documentation from Synopsys say about the bit you have
used for DMA_INTR_ENA_NIE_LOONGSON? Is it marked as being usable by IP
integrators for whatever they want, or is it marked as reserved?

I'm just wondering if we are heading towards a problem when the next
version of this IP assigns the bit to mean something else.

	Andrew