Re: [PATCH 0/2] Apple T2 platform support

[Aditya Garg]

Hi Hector

I’ve applied the following patchset (arranged in chronological order) to linux 6.2,
and wifi seems to have broken on MacBookPro16,1 (brcmfmac4364b3)

https://lore.kernel.org/asahi/20230212063813.27622-1-marcan@xxxxxxxxx/T/#t (BCM4355/4364/4377 support & identification fixes)

https://lore.kernel.org/asahi/20230214080034.3828-1-marcan@xxxxxxxxx/T/#t (Apple T2 platform support)

https://lore.kernel.org/asahi/20230214091651.10178-1-marcan@xxxxxxxxx/T/#t (BCM4387 / Apple M1 platform support)

https://lore.kernel.org/asahi/b4489e24-e226-4f99-1322-cab6c1269f09@xxxxxxxxxxxx/T/#t (brcmfmac: cfg80211: Use WSEC to set SAE password)


The logs show:

Feb 23 20:08:57 MacBook kernel: usbcore: registered new interface driver brcmfmac
Feb 23 20:08:57 MacBook kernel: brcmfmac 0000:05:00.0: enabling device (0000 -> 0002)
Feb 23 20:08:57 MacBook kernel: brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac4364b3-pcie for chip BCM4364/4
Feb 23 20:08:57 MacBook kernel: brcmfmac 0000:05:00.0: Direct firmware load for brcm/brcmfmac4364b3-pcie.Apple Inc.-MacBookPro16,1.bin failed with error -2
Feb 23 20:08:57 MacBook kernel: brcmfmac 0000:05:00.0: Direct firmware load for brcm/brcmfmac4364b3-pcie.bin failed with error -2
Feb 23 20:08:57 MacBook kernel: brcmfmac 0000:05:00.0: brcmf_pcie_setup: Dongle setup failed

I also tested the patchiest in the following link, and wifi mostly worked there (occasionally it complained about some pic error, I’ll save the logs next time I encounter that) :

https://github.com/t2linux/linux-t2-patches/blob/main/8001-asahilinux-wifi-patchset.patch

Thanks
Aditya

> On 14-Feb-2023, at 1:30 PM, Hector Martin <marcan@xxxxxxxxx> wrote:
> 
> Hi all,
> 
> This short series adds the missing bits to support Apple T2 platforms.
> 
> There are two quirks: these devices have firmware that requires the
> host to provide a blob of randomness as a seed (presumably because the
> chipsets lack a proper RNG), and the module/antenna information that
> is used for Apple firmware selection and comes from the Device Tree
> on ARM64 systems (already upstream) needs to come from ACPI on these
> instead.
> 
> Changes since the megaseries from a ~year ago: made the ACPI code bail
> if there is no module-instance, so we don't try to get the antenna
> info at all in that case (as suggested by Arend). Made the randomness
> conditional on an Apple OTP being present, since it's not known to be
> needed on non-Apple firmware.
> 
> Hector Martin (2):
>  brcmfmac: acpi: Add support for fetching Apple ACPI properties
>  brcmfmac: pcie: Provide a buffer of random bytes to the device
> 
> .../broadcom/brcm80211/brcmfmac/Makefile      |  2 +
> .../broadcom/brcm80211/brcmfmac/acpi.c        | 51 +++++++++++++++++++
> .../broadcom/brcm80211/brcmfmac/common.c      |  1 +
> .../broadcom/brcm80211/brcmfmac/common.h      |  9 ++++
> .../broadcom/brcm80211/brcmfmac/pcie.c        | 32 ++++++++++++
> 5 files changed, 95 insertions(+)
> create mode 100644 drivers/net/wireless/broadcom/brcm80211/brcmfmac/acpi.c
> 
> -- 
> 2.35.1
> 
>