On Thu, 21 Jan 2021 01:01:21 +0100 Andrew Lunn wrote: > On Wed, Jan 20, 2021 at 03:41:58PM -0800, Jakub Kicinski wrote: > > On Wed, 20 Jan 2021 14:56:46 +0100 Andrew Lunn wrote: > > > > No, the FW does not know. The ASIC is not physically able to get the > > > > linecard type. Yes, it is odd, I agree. The linecard type is known to > > > > the driver which operates on i2c. This driver takes care of power > > > > management of the linecard, among other tasks. > > > > > > So what does activated actually mean for your hardware? It seems to > > > mean something like: Some random card has been plugged in, we have no > > > idea what, but it has power, and we have enabled the MACs as > > > provisioned, which if you are lucky might match the hardware? > > > > > > The foundations of this feature seems dubious. > > > > But Jiri also says "The linecard type is known to the driver which > > operates on i2c." which sounds like there is some i2c driver (in user > > space?) which talks to the card and _does_ have the info? Maybe I'm > > misreading it. What's the i2c driver? > > Hi Jakub > > A complete guess, but i think it will be the BMC, not the ASIC. There > have been patches from Mellanox in the past for a BMC, i think sent to > arm-soc, for the ASPEED devices often used as BMCs. And the BMC is > often the device doing power management. So what might be missing is > an interface between the driver and the BMC. But that then makes the > driver system specific. A OEM who buys ASICs and makes their own board > could have their own BMC running there own BMC firmware. > > All speculation...
I see that does make sense 🤔
