linux-kernel - Re: [PATCH v1 5/5] PCI: brcmstb: Set RCB_{MPS,64B}

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Message-ID: <20221007193253.GA2643566@bhelgaas>
Date:   Fri, 7 Oct 2022 14:32:53 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Jim Quinlan <jim2101024@...il.com>
Cc:     linux-pci@...r.kernel.org,
        Nicolas Saenz Julienne <nsaenz@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Cyril Brulebois <kibi@...ian.org>,
        bcm-kernel-feedback-list@...adcom.com, james.quinlan@...adcom.com,
        Florian Fainelli <f.fainelli@...il.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@...ts.infradead.org>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 5/5] PCI: brcmstb: Set RCB_{MPS,64B}_MODE bits

On Thu, Oct 06, 2022 at 06:03:21PM -0400, Jim Quinlan wrote:
> Set RCB_MPS mode bit so that data for PCIe read requests up to the size of
> the Maximum Payload Size (MPS) are returned in one completion,

> and data for
> PCIe read requests greater than the MPS are split at the specified Read
> Completion Boundary setting.

I think this second part is required by PCIe r6.0, sec 2.3.1.1,
regardless of the setting of RCB_MPS, isn't it?

> Set RCB_64B so that read compeletion boudnary is 64B.

To match usage in spec and above and fix typos,

s/that read compeletion boudnary/the Read Completion Boundary/

Bjorn