[Intel-gfx] [PATCH 0/2] Sanity Check for device memory region

[Matthew Auld]

On Tue, 7 Dec 2021 at 16:04, Matthew Auld
<matthew.william.auld at gmail.com> wrote:
>
> On Tue, 7 Dec 2021 at 14:34, Ramalingam C <ramalingam.c at intel.com> wrote:
> >
> > Changes for introducing the quick test on the device memory range and
> > also a test of detailed validation for each addr of the range with read
> > and write.
> >
> > Detailed testing is optionally enabled with a modparam i915.memtest=1
>
> Series is missing Cc: dri-devel
>
> Also on DG1, CI is apparently spitting out:
>
> <7> [128.605872] i915 0000:03:00.0: [drm:i915_gem_init_stolen [i915]]
> GEN6_STOLEN_RESERVED = 0x00000000ffc00107
> <7> [128.605978] i915 0000:03:00.0: [drm:i915_gem_init_stolen [i915]]
> Memory reserved for graphics device: 65536K, usable: 61440K
> <3> [128.606145] i915 0000:03:00.0: Failed to read back from memory
> region:[mem 0xfc000000-0xffffffff] at [0x00000040fc000000 +
> 0x0000000003fff000] for i915_gem_stolen_lmem_setup [i915]; wrote 0,
> read (ff, ff, ff)
> <3> [128.606297] i915 0000:03:00.0: [drm] *ERROR* Failed to setup
> region(-22) type=3
> <3> [128.623091] i915 0000:03:00.0: Device initialization failed (-22)
>
> So something is busted with stolen-lmem it seems...wonder if that's
> related to the DG2 issue.

Ram, as part of this series can you also grab:
drm/i915: Exclude reserved stolen from driver use

That might fix the DG2 stolen issue also...

>
> >
> > Chris Wilson (2):
> >   drm/i915: Sanitycheck device iomem on probe
> >   drm/i915: Test all device memory on probing
> >
> >  drivers/gpu/drm/i915/i915_params.c         |   3 +
> >  drivers/gpu/drm/i915/i915_params.h         |   1 +
> >  drivers/gpu/drm/i915/intel_memory_region.c | 116 +++++++++++++++++++++
> >  3 files changed, 120 insertions(+)
> >
> > --
> > 2.20.1
> >