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

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Date:   Thu, 23 Feb 2023 15:04:54 +0000
From:   Aditya Garg <gargaditya08@...e.com>
To:     Hector Martin <marcan@...can.st>
CC:     Arend van Spriel <aspriel@...il.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Sven Peter <sven@...npeter.dev>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Linus Walleij <linus.walleij@...aro.org>,
        "asahi@...ts.linux.dev" <asahi@...ts.linux.dev>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "brcm80211-dev-list.pdl@...adcom.com" 
        <brcm80211-dev-list.pdl@...adcom.com>,
        "SHA-cyfmac-dev-list@...ineon.com" <SHA-cyfmac-dev-list@...ineon.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/2] Apple T2 platform support



> On 23-Feb-2023, at 8:31 PM, Aditya Garg <gargaditya08@...e.com> wrote:
> 
> 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@marcan.st/T/#t (BCM4355/4364/4377 support & identification fixes)
> 
> https://lore.kernel.org/asahi/20230214080034.3828-1-marcan@marcan.st/T/#t (Apple T2 platform support)
> 
> https://lore.kernel.org/asahi/20230214091651.10178-1-marcan@marcan.st/T/#t (BCM4387 / Apple M1 platform support)
> 
> https://lore.kernel.org/asahi/b4489e24-e226-4f99-1322-cab6c1269f09@broadcom.com/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) :
> 

Sorry for the typos here (thanks to autocorrect)

It says

I also tested the *patchset* in the following link, and wifi mostly worked there (occasionally it complained about some *pci* 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@...can.st> 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
>> 
>> 
>