Date: Thu, 26 Feb 2015 15:35:22 +0100 From: Hans Petter Selasky <hps@selasky.org> To: mike@karels.net Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, Eric Joyner <ricera10@gmail.com>, Gleb Smirnoff <glebius@FreeBSD.org>, Jack Vogel <jfvogel@gmail.com>, "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org> Subject: Re: Adding new media types to if_media.h Message-ID: <54EF2F2A.8060304@selasky.org> In-Reply-To: <201502261421.t1QELflw056051@mail.karels.net> References: <201502261421.t1QELflw056051@mail.karels.net>
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On 02/26/15 15:21, Mike Karels wrote: >> I'm doing some work for Mellanox and we need some 100GBase types for >> coming hardware products too. > >> I think we are not using the 32-bits of "ifm_media" well enough. > >> Has it been discussed to add more bits to "IFM_NMASK" and have more >> ethernet types like IFM_ETHER_0, IFM_ETHER_1, IFM_ETHER_2, IFM_ETHER_3 .... > >> Currently 5 IFM types are defined. If 2 more bits can be added to >> IFM_NMASK we have 5 bits total giving us 2**5 = 32 IFM types. Then it >> should be possible to define "(32 - 5) * 32 = 864" more ethernet types, >> which I think should be enough for now - or we add even one more bit to >> IFM_NMASK ? > > Did you have specific bits in mind? I'm fairly sure they are all assigned > to something now. The adjacent bits are used for the subtype/variant and > options. Most of the options are used, maybe not all. > > I haven't checked whether the "instance" field is still used, though. It > was for MII PHY numbers, I believe. > > If we had more bits, it seems better to put them directly into the subtype > field rather than the type field. > > Mike > Hi, There are 6 token ring bits, which I presume are available when token ring is not selected. #define IFM_TOK_ETR 0x00000200 /* Early token release */ #define IFM_TOK_SRCRT 0x00000400 /* Enable source routing features */ #define IFM_TOK_ALLR 0x00000800 /* All routes / Single route bcast */ #define IFM_TOK_DTR 0x00002000 /* Dedicated token ring */ #define IFM_TOK_CLASSIC 0x00004000 /* Classic token ring */ #define IFM_TOK_AUTO 0x00008000 /* Automatic Dedicate/Classic token ring */ Maybe these can be used for other purposes when the type is equal to ethernet? --HPS
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