Date: Wed, 30 Mar 2016 11:20:51 -0700 From: Jim Harris <jim.harris@gmail.com> To: Luigi Rizzo <rizzo@iet.unipi.it> Cc: freebsd-current <freebsd-current@freebsd.org> Subject: Re: accessing a PCIe register from userspace through kmem or other ways ? Message-ID: <CAJP=Hc_A2-i8twW4AhnA50ryf3%2BHLOparQ9xcCnCCVLv0%2B9PSw@mail.gmail.com> In-Reply-To: <CA%2BhQ2%2BiU4odjhaNicFA4QjvSZR2OZOOy%2BFu4LTqsibdoK4M8zg@mail.gmail.com> References: <CA%2BhQ2%2BiU4odjhaNicFA4QjvSZR2OZOOy%2BFu4LTqsibdoK4M8zg@mail.gmail.com>
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On Wed, Mar 30, 2016 at 10:47 AM, Luigi Rizzo <rizzo@iet.unipi.it> wrote: > Hi, > I'd like to test the rate at which I can access device registers > on a PCIe card, and was wondering whether I need to patch a device > driver, or perhaps I can use /dev/kmem once I figure out where > the registers are mapped ? > You do not need to patch a device driver. Have you looked at libpciaccess? This should give you everything you need. -Jim > thanks > luigi > > -- > -----------------------------------------+------------------------------- > Prof. Luigi RIZZO, rizzo@iet.unipi.it . Dip. di Ing. dell'Informazione > http://www.iet.unipi.it/~luigi/ . Universita` di Pisa > TEL +39-050-2217533 . via Diotisalvi 2 > Mobile +39-338-6809875 . 56122 PISA (Italy) > -----------------------------------------+------------------------------- > _______________________________________________ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >
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