Adding new media types to if_media.h

[Hans Petter Selasky]

On 02/26/15 15:35, Hans Petter Selasky wrote:
> 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
>

Hi Mike,

My proposal is, convert:

 > #define IFM_TOK_DTR     0x00002000      /* Dedicated token ring */
 > #define IFM_TOK_CLASSIC 0x00004000      /* Classic token ring */
 > #define IFM_TOK_AUTO    0x00008000      /* Automatic Dedicate/Classic

Into different network types:

#define IFM_TOKEN_NONE
#define IFM_TOKEN_DTR
#define IFM_TOKEN_CLASSIC
#define IFM_TOKEN_AUTO

and extend the IFM_NMASK like this:

#define IFM_NMASK       0x0000e0e0      /* Network type */

--HPS