Date: Fri, 31 Mar 2017 16:01:00 +0200 From: Marcin Wojtas <mw@semihalf.com> To: freebsd-arm@freebsd.org Subject: Coherent bus_dma for ARMv7 Message-ID: <CAPv3WKejupH4JG1=_XV6PknnKifxbF0qoVubtMRVtZWEoBZ7xg@mail.gmail.com>
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Hi, In current FreeBSD-HEAD ARMv7 platforms, which support hardware IO cache coherency cannot make use of this feature. In our project we implemented coherent variant bus_dma, which is basing on x86 and arm64 approach. Using of above solution is not obligatory and depends on setting newly added option for that purpose. Needless to say, our platform (Marvell Armada 38x) IO performance boosted after switching to it. Do you wish to enable such option in HEAD? Regards, Marcin
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