[igt-dev] [RFC 0/2] lib/xe_gpu: Introduce xe_gpu library

[Karas, Anna]

Hi all,
CC-ing Mauro, Matthew and Zbyszek to this thread (btw. sorry for using 
@intel.com instead of @linux.intel.com in the original email)

@all - folks, any thoughts on opens? :)

On 20.04.2023 22:38, Souza, Jose wrote:
> On Thu, 2023-04-20 at 21:14 +0200, Anna Karas wrote:
>> OPENS:
>> 1. Lack of wedged concept in XE: @Matthew informed me that there is no
>> intent to have reporting wedged device in XE. However, @Joonas believes
>> that it may be useful - "it's used at least in specific diagnostics and
>> hardware repair flows for PVC and FLR for all platforms, where we
>> prevent further accesses to the hardware. So an alternative mechanism is
>> needed for those". Since xe_require_gpu() is a direct port of i915's
>> igt_require_gem() stripped of wedged device reporting, this could be a
>> good opportunity to discuss this.
> 
> I guess you could create a Xe engine, submit NOPs and check for XE_ENGINE_GET_PROPERTY_BAN to detect if GPU is wedged.
> 

@Jose - It seems that this may help here, thanks

On 21.04.2023 09:56, Zbigniew Kempczyński wrote:
 >> +int xe_reopen_driver(int fd)
 >> +{
 >> +	char path[256];
 >> +
 >> +	snprintf(path, sizeof(path), "/proc/self/fd/%d", fd);
 >> +	fd = open(path, O_RDWR);
 >> +	igt_assert_fd(fd);
 >> +
 >> +	return fd;
 >> +}
 >
 > On quick first look:
 >
 > Duplicates gem_reopen_driver() code, maybe just replace 'i915' to 'fd'
 > there?
 >
 > --
 > Zbigniew

@Zbyszek - I agree. gem_reopen_driver() is currently placed in lib/i915, 
would it be a good idea to move it (as "drm_reopen_driver()", with 
'i915' replaced with 'fd') to lib/drmtest.c?

Ania
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