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Date:      Thu, 24 Sep 2020 15:41:11 -0700
From:      Mark Millard <marklmi@yahoo.com>
To:        Robert Crowston <crowston@protonmail.com>
Cc:        Klaus Cucinauomo <maciphone2@googlemail.com>, freebsd-arm@freebsd.org
Subject:   Re: head -r365677 and later do not have the xhci related DMA problem fixed
Message-ID:  <231B8A1B-7F61-4868-B9E6-F8DD824079CA@yahoo.com>
In-Reply-To: <JTSsaCfyfQICpQuYOx_aY-35TQTxCtQbI3L_t1o70kdtk-MZrrJ06WuluBwhYS5BQ58Apdet1XTP3u79WZYGUj8L2BjY_owAkoVLMN8IXVU=@protonmail.com>
References:  <5A60B29E-0D24-480C-807D-4A5E92D9C92A.ref@yahoo.com> <5A60B29E-0D24-480C-807D-4A5E92D9C92A@yahoo.com> <CCC44A9E-68C0-4EEF-AA68-AFA2F1F93ADA@googlemail.com> <JTSsaCfyfQICpQuYOx_aY-35TQTxCtQbI3L_t1o70kdtk-MZrrJ06WuluBwhYS5BQ58Apdet1XTP3u79WZYGUj8L2BjY_owAkoVLMN8IXVU=@protonmail.com>

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On 2020-Sep-24, at 14:59, Robert Crowston <crowston@protonmail.com> =
wrote:

> Yes: aren=E2=80=99t you dependent on the unrelated D25219 to fix uefi?

I have had that patch in place right along. It does not fix the
xhci "> 3072 MiByte" DMA problem either.

> The DMA patch I submitted is at the PCI-e level; I haven=E2=80=99t =
touched xhci. Sorry for confusion!

Ahh. No central spot for dealing with such limitations related
to the xhci. Well, that makes uefi/ACPI support less likely
long term.

So, should I figure out the currently proper way to have a
u-boot based boot environment and try the huge-file duplicate
and diff/cmp test in such an environment?




Side note: While there is no CM4 compute module yet, they have
publicly stated that they currently intend on exposing the
PCIe on it once they have such as a product.

In fact, there is:

https://github.com/Hexxeh/rpi-firmware/blob/master/bcm2711-rpi-cm4.dtb

and:

=
https://github.com/raspberrypi/firmware/blob/master/boot/bcm2711-rpi-cm4.d=
tb

and even even official tagged builds with such:

=
https://github.com/raspberrypi/firmware/blob/1.20200902/boot/bcm2711-rpi-c=
m4.dtb


=3D=3D=3D
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)




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