Date: Sun, 2 Aug 2020 12:47:10 +1000 From: Stephen Hocking <stephen.hocking@gmail.com> To: Stefan Esser <se@freebsd.org> Cc: hackers@freebsd.org Subject: Re: Support for RealTek RTL8125B chipset? Message-ID: <CA%2BxzKjBniaNKU1zrBvsrQST5TRt9vW0ZOcLxErmajmoLdrs9FQ@mail.gmail.com> In-Reply-To: <83f06794-1945-649a-6997-dc2959cb0d82@freebsd.org> References: <CA%2BxzKjAnEzJk2N%2BNiuTDHQrU4VyFcod3bPyHBnZWcwKkVq9k0w@mail.gmail.com> <83f06794-1945-649a-6997-dc2959cb0d82@freebsd.org>
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Hi Stefan, Thanks for updating me on this - do you need any hardware for testing etc? On Sat, 1 Aug 2020 at 19:33, Stefan Esser <se@freebsd.org> wrote: > > Am 01.08.20 um 05:05 schrieb Stephen Hocking: > > Just scored one of those spiffy Odroid H2+ boxes with 2 ethernet > > ports, only to be disappointed that FreeBSD 12.1 doesn't seem to > > support the ethernet chipset. Does anyone have any plans to add this > > in the foreseeable future? > > Short answer: try the port version (net/realtek_re_kmod). I'm using > it on my AMD B550 mainboard with on-board RTL8125, currently. It is > known to work on amd64, but I have not seen any success reports for > another architecture, yet. > > Since that port is based on the FreeBSD driver available from the > RealTek web-site, which still has ifdefs for FreeBSD 4 and earlier, > but lacks a number of features added to our version in recent years, > I have started to merge the code required to support the RTL8125 to > our driver, a few weeks ago. (There is no publicly available data > sheet or other information for the RTL8125 and its PHY, AFAIK.) > > I have merged most of the header bits (defines for new registers and > new bits in existing registers) to sys/dev/rl/if_rlreg.h and have > added some of the new functionality to sys/dev/re/if_re.c, but a lot > is missing and a lot can still be improved. > > And then there is the MII PHY code that is embedded in the RealTek > driver and split of into the miibus framework in FreeBSD. The code > that operates on the PHY has therefore to be separated out from the > RealTek driver and integrated into our mii/rgephy.c ... > > > The Realtek driver contains more than 10 embedded firmware blobs for > different RealTek chips supported by the driver (supposedly to work > around a number of chip bugs or deficiencies of the firmware burnt > into those chips) and I have found that there are about the same > number of specific firmware files for the Linux RealTek driver, too > (but not 1:1 matching the one in the RealTek driver, looking at the > names of those firmware files). > > The driver distributed by RealTek (and used for the kmod port) has > a list of some 60 chip revisions and special cases in nearly every > function to support them (there are 4 procedures to reset the chip, > for example). > > I have converted quite some code from the RealTek driver to fit in > with our driver version and the merged driver should contain all the > features of our current re driver and missing in the RealTek version > (e.g. NETMAP support) but also include support for the RTL8125 and > I plan to integrate the firmware loading (but that could lead to > slightly different behavior of the RTL chips and thus to regressions > since our driver code assumes the behavior of the chip with its burnt > in firmware ...) > > My version still works with e.g. the RTL8111 I bought to have another > chip of this series in my development system to be able to test for > regressions. But it does not fully initialize the RTL8125, yet, and > work will progress as spare time permits. > > TL:DR > > The port version seems to work well enough to get the RTL8125 working > without a number of features our if_re.c grew over time. It will also > work with other RTL chips and might even give better results for them, > since it includes revision specific firmware blobs. > > I hope to get a working RTL8125 driver that does include all features > of our current if_re.c within a few weeks. But this is a spare-time > project and progress will depend on the amount of available time ... > > Regards, STefan -- "I and the public know what all schoolchildren learn Those to whom evil is done Do evil in return" W.H. Auden, "September 1, 1939"
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