CURRENT: SMBus controller driver for AMD APU GX-412TC SOC

[O. Hartmann]

Am Sun, 18 Sep 2016 19:56:24 +0300
Andriy Gapon <avg at FreeBSD.org> schrieb:

> On 18/09/2016 17:05, O. Hartmann wrote:
> > Running a recent CURRENT (FreeBSD 12.0-CURRENT #11 r305903: Sat Sep 17 20:30:19 CEST
> > 2016) on a PCengines APU 2C4, I see no driver adapted to the SMBus of the system,
> > although I have the driver statically linked into the kernel via
> > 
> > [...]
> > # System Management Bus
> > device          smbus
> > device          smb             # SMB generic I/O device driver
> > device          ichsmb          # Intel ICH SMBus controller driver
> > device          amdsmb          # AMD-8111 SMBus 2.0 controller driver
> > device          iicsmb          #
> > device          iicbus
> > device          iicbb
> > device          iic
> > device          ic
> > [...]
> > 
> > pciconf -lvbp shows up this message:
> > 
> > [...]
> > none1 at pci0:0:20:0:      class=0x0c0500 card=0x780b1022 chip=0x780b1022 rev=0x42
> > hdr=0x00 vendor     = 'Advanced Micro Devices, Inc. [AMD]'
> >     device     = 'FCH SMBus Controller'
> >     class      = serial bus
> >     subclass   = SMBus
> > 
> > So, I guess CURRENT doesn't have a driver covering this type of system? Or do I miss
> > something here?  
> 
> First of all, as strange as it may seem, the correct driver in this case would
> be intpm.  See its manual page.
> Second, the driver doesn't support your hardware yet.  Some rather small changes
> are required and I am working on that.

First: thanks for the answer. Second: thanks for working on it. Third: As strange as it
may sound, I would have expected it to reside in amdsmb(4) ;-)

> 
> 
> > I also see a very strange, mysterious and interesting feature, also not attached with
> > a driver:
> > 
> > none0 at pci0:0:8:0:       class=0x108000 card=0x15371022 chip=0x15371022 rev=0x00
> > hdr=0x00 vendor     = 'Advanced Micro Devices, Inc. [AMD]'
> >     class      = encrypt/decrypt
> >     bar   [10] = type Prefetchable Memory, range 64, base 0xfea00000, size 131072,
> > enabled bar   [18] = type Memory, range 32, base 0xfe800000, size 1048576, enabled
> >     bar   [1c] = type Memory, range 32, base 0xfea24000, size 4096, enabled
> >     bar   [20] = type Memory, range 32, base 0xfe900000, size 1048576, enabled
> >     bar   [24] = type Memory, range 32, base 0xfea20000, size 8192, enabled
> >     cap 11[50] = MSI-X supports 2 messages
> >                  Table in map 0x24[0x0], PBA in map 0x24[0x1000]
> >     cap 08[5c] = HT MSI fixed address window enabled at 0xfee00000
> >     cap 01[60] = powerspec 3  supports D0 D3  current D0
> > 
> > 
> > Encrypt/decrypt? What is this?
> > 
> > Thanks for your patience and enlighting me,  
> 
> I think that that's this hardware:
> http://www.amd.com/en-us/innovations/software-technologies/security
> http://www.anandtech.com/show/6007/amd-2013-apus-to-include-arm-cortexa5-processor-for-trustzone-capabilities
> 
> Linux has a driver for it:
> http://www.phoronix.com/scan.php?px=MTU4MTM&page=news_item
> http://cateee.net/lkddb/web-lkddb/CRYPTO_DEV_CCP.html
> 

I see ... Linux then ...

Kind regards,

Oliver
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