GuC issue

[maksym at wezdecki.pl]

Ah, I dumped them with Windows new line characters.

Here is a new log binary dump.

I moved to the newest TGL GuC firmware from linux-firmware repo.


środa, 21 lutego 2024 12:16 AM, John Harrison <john.c.harrison at intel.com> napisał(a):

> 
> 
> Hello,
> 
> Something is very corrupted with that GuC log. The log consists of a
> header page and then a stream of log entry structures. The structure is
> supposed to be 20 bytes long and starts with a four byte time stamp. But
> I am seeing what is conceivably a 32bit timestamp appearing at 21 byte
> increments through the log. Even more curiously, the time stamp seems to
> have an 0x0D, 0x0A after it. Are you doing any printf type operation in
> order to write the log out from memory to disk?
> 
> INTEL_GUC_LOAD_STATUS_INIT_DATA_INVALID means that the GuC did not like
> the initialisation data passed in. Most likely, something in the ADS
> structure is not valid. If you try with the latest GuC version, that
> might give you more information as to what is the incorrect. More status
> codes have been added since 70.1.1.
> 
> John.
> 
> 
> On 2/20/2024 05:03, maksym at wezdecki.pl wrote:
> 
> > Hi,
> > 
> > Please see GuC log attached to this email.
> > 
> > Log size is "PAGE_SIZE+Debug Log(64KB) + Crash Log (8KB) + Capture Log (1M)"
> > 
> > Can anybody from Intel decode this log buffer? Thanks.
> > 
> > What am I doing wrong?
> > 
> > Maksym
> > 
> > poniedziałek, 19 lutego 2024 09:44, maksym at wezdecki.pl maksym at wezdecki.pl napisał(a):
> > 
> > > Hi,
> > > 
> > > I fixed one issue in my driver. Log address was set incorrectly.
> > > 
> > > Right now, after GuC uploading, GUC_STATUS changed.
> > > Right now, intel_guc_load_status is INTEL_GUC_LOAD_STATUS_INIT_DATA_INVALID = 0x71.
> > > 
> > > What does it mean?
> > > Could you please help me with this?
> > > 
> > > Thanks,
> > > Maksym
> > > 
> > > piątek, 9 lutego 2024 08:42, natur.produkt at pm.me natur.produkt at pm.me napisał(a):
> > > 
> > > > Hello,
> > > > 
> > > > Please see my comments below.
> > > > 
> > > > piątek, 9 lutego 2024 2:45 AM, John Harrison john.c.harrison at intel.com napisał(a):
> > > > 
> > > > > Hello,
> > > > > 
> > > > > What platform is this on? And which GuC firmware version are you using?
> > > > > It's TGL. I'm using tgl_guc_70.1.1.bin firmware blob.
> > > > 
> > > > > One thing you made need to do is force maximum GT frequency during GuC
> > > > > load. That is something the i915 driver does. If the system decides the
> > > > > GPU is idle and drops the frequency to minimum then it can take multiple
> > > > > seconds for the GuC initialisation to complete.
> > > > > Thanks for the hint. I'm not doing that at all in my code. How am I supposed to do this? Is there a specific register for that?
> > > > 
> > > > > Did the status change at all during that second of waiting? Or was it
> > > > > still reading LAPIC_DONE?
> > > > > It's always LAPIC_DONE.
> > > > 
> > > > > For ADS documentation, I'm afraid that the best we currently have
> > > > > publicly available is the i915 driver code. If you are not intending to
> > > > > use GuC submission then most of the ADS can be ignored.
> > > > > Ok, that great. Which part of ADS is must-have then?
> > > > 
> > > > > If you can share the GuC log, that might provide some clues as to what
> > > > > is happening. For just logging the boot process, you shouldn't need to
> > > > > allocate a large log. The default size of i915 for release builds is
> > > > > 64KB. That should be plenty.
> > > > > I'll collect GuC log as soon as possible. Is it something that can be understood without a knowledge of GuC internals? Or is it simply hex dumps?
> > > > 
> > > > > John.
> > > > > 
> > > > > On 2/6/2024 23:59, natur.produkt at pm.me wrote:
> > > > > 
> > > > > > Hi,
> > > > > > 
> > > > > > I'm currently implementing GuC/HuC firmware support in one Safety Critical OS.
> > > > > > I'm following i915 code and I implemented all paths (I don't want GuC submission or SLPC features). I need GuC to authenticate HuC firmware blob.
> > > > > > 
> > > > > > I mirrored GuC implementation in my code.
> > > > > > 
> > > > > > After GuC DMA transfer succeeds, I'm reading GUC_STATUS register.
> > > > > > HW returns INTEL_BOOTROM_STATUS_JUMP_PASSED as bootrom status and INTEL_GUC_LOAD_STATUS_LAPIC_DONE as GuC load status.
> > > > > > 
> > > > > > Unfortunately, after one second of waiting, the status didn't get changed to INTEL_GUC_LOAD_STATUS_READY at all.
> > > > > > 
> > > > > > What is a potential issue here?
> > > > > > Could you please help me?
> > > > > > 
> > > > > > In addition to this, could you please point out some documentation about GuC's ADS struct?
> > > > > > 
> > > > > > Thanks,
> > > > > > Maksym

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