Date: Sat, 1 Aug 2020 11:33:17 +0200 From: Stefan Esser <se@freebsd.org> To: Stephen Hocking <stephen.hocking@gmail.com> Cc: hackers@freebsd.org Subject: Re: Support for RealTek RTL8125B chipset? Message-ID: <83f06794-1945-649a-6997-dc2959cb0d82@freebsd.org> In-Reply-To: <CA%2BxzKjAnEzJk2N%2BNiuTDHQrU4VyFcod3bPyHBnZWcwKkVq9k0w@mail.gmail.com> References: <CA%2BxzKjAnEzJk2N%2BNiuTDHQrU4VyFcod3bPyHBnZWcwKkVq9k0w@mail.gmail.com>
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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
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