Date: Fri, 12 Jun 2020 16:12:25 +0000 From: myfreeweb <greg@unrelenting.technology> To: Robert Crowston <crowston@protonmail.com>, =?ISO-8859-1?Q?Klaus_K=FCchemann?= <maciphone2@googlemail.com>, Hans Petter Selasky <hps@selasky.org>, Mark Millard <marklmi@yahoo.com>, freebsd-arm@freebsd.org Subject: Re: Unrelenting testplan D25219 Message-ID: <26B03CE9-E91F-466B-9912-56CCB4E28817@unrelenting.technology> In-Reply-To: <eHCAzXv-Rr39w3F-euypm4DrLx9jd88297x9hyHaNi_-VXR-ZiLdgFg6HvpI87aFLHGM_YcbOLADi0BLIR0jy557fbWDxKs4yIqf5ZfsDZ4=@protonmail.com> References: <876E685B-B3AC-4821-A88F-702ABA3D9812@yahoo.com> <5FE76178-4255-46B0-9A0D-F7640EFCBBE4@googlemail.com> <F1DC2AFB-0CC7-407D-A6C0-4E109590612E@unrelenting.technology> <C7D9957A-5C58-48FF-9601-7DD13DE9D89B@googlemail.com> <8414e0163e5cb2e9c4a4c7b02aa01666@unrelenting.technology> <5B8A58D0-9662-49DD-9CC3-226A3A92EFD6@googlemail.com> <abc05bea-ea4a-9189-611c-a1a0000182d8@selasky.org> <FE0813DD-29CA-4ADA-BD6B-963E3DC635B2@googlemail.com> <eHCAzXv-Rr39w3F-euypm4DrLx9jd88297x9hyHaNi_-VXR-ZiLdgFg6HvpI87aFLHGM_YcbOLADi0BLIR0jy557fbWDxKs4yIqf5ZfsDZ4=@protonmail.com>
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On June 12, 2020 3:02:22 PM UTC, Robert Crowston <crowston@protonmail=2Eco= m> wrote: >I have seen this behaviour when the xhci controller was unable to perform= DMA=2E In my case I had the system memory configuration incorrectly encode= d on the pci-e controller=2E > >What is the physical address to which the xhci controller is performing D= MA? It needs to be in the lower 3 GB of the physical address space=2E On my 4gb, when the controller was unable to DMA (mem limit off and no efi= memory map patch) there were just disk errors, i=2Ee=2E garbage instead of= memstick contents=2E It's easy to test whether this is a DMA>3gb issue =E2=80=93 just enable th= e mem limit in the firmware=2E
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