We are checking cp_irq_count from the wrong hdcp structure which
ends up giving timed out errors. We only increment the cp_irq_count
of the primary connector's hdcp structure but here in case of
multidisplay setup we end up checking the secondary connector's hdcp
structure, which will not have its cp_irq_count incremented. This leads
to a timed out at CP_IRQ error even though a CP_IRQ was raised. Extract
it from the correct intel_hdcp structure.
--v2
-Explain why it was the wrong hdcp structure [Jani]
Fixes: 8c9e4f68b8 ("drm/i915/hdcp: Use per-device debugs")
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240809114127.3940699-2-suraj.kandpal@intel.com
(cherry picked from commit dd92590263)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Disable bit 29 of SCLKGATE_DIS register around pps sequence
when we turn panel power on.
--v2
-Squash two commit together [Jani]
-Use IS_DISPLAY_VER [Jani]
-Fix multiline comment [Jani]
--v3
-Define register in a more appropriate place [Mitul]
--v4
-Register is already defined no need to define it again [Ville]
-Use correct WA number (lineage no.) [Dnyaneshwar]
-Fix the range on which this WA is applied [Dnyaneshwar]
Bspec: 49304
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Dnyaneshwar Bhadane <dnyaneshwar.bhadane@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240813042807.4015214-1-suraj.kandpal@intel.com
We are checking cp_irq_count from the wrong hdcp structure which
ends up giving timed out errors. We only increment the cp_irq_count
of the primary connector's hdcp structure but here in case of
multidisplay setup we end up checking the secondary connector's hdcp
structure, which will not have its cp_irq_count incremented. This leads
to a timed out at CP_IRQ error even though a CP_IRQ was raised. Extract
it from the correct intel_hdcp structure.
--v2
-Explain why it was the wrong hdcp structure [Jani]
Fixes: 8c9e4f68b8 ("drm/i915/hdcp: Use per-device debugs")
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240809114127.3940699-2-suraj.kandpal@intel.com
Kernel test robot reports i915 can hit a warn in kvmalloc_node which has
a purpose of dissalowing crazy size kernel allocations. This was added in
7661809d49 ("mm: don't allow oversized kvmalloc() calls"):
/* Don't even allow crazy sizes */
if (WARN_ON_ONCE(size > INT_MAX))
return NULL;
This would be kind of okay since i915 at one point dropped the need for
making a shadow copy of the relocation list, but then it got re-added in
fd1500fcd4 ("Revert "drm/i915/gem: Drop relocation slowpath".") a year
after Linus added the above warning.
It is plausible that the issue was not seen until now because to trigger
gem_exec_reloc test requires a combination of an relatively older
generation hardware but with at least 8GiB of RAM installed. Probably even
more depending on runtime checks.
Lets cap what we allow userspace to pass in using the matching limit.
There should be no issue for real userspace since we are talking about
"crazy" number of relocations which have no practical purpose.
*) Well IGT tests might get upset but they can be easily adjusted.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202405151008.6ddd1aaf-oliver.sang@intel.com
Cc: Kees Cook <keescook@chromium.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20240521101201.18978-1-tursulin@igalia.com
Convert all callers from working on a page to working on one page
of a folio (support for working on an entire folio can come later).
Removes a lot of folio->page->folio conversions.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Most callers have a folio, and most implementations operate on a folio,
so remove the conversion from folio->page->folio to fit through this
interface.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
In commit a78a8da51b ("drm/ttm: replace busy placement with flags v6"),
__i915_ttm_get_pages was updated to use flags instead of the separate
'busy' placement list. However, the behaviour was subtly changed.
Originally, the function would attempt to use the preferred placement
without eviction, and give an opportunity to restart the operation
before falling back to allowing eviction.
This was unintentionally changed, as the preferred placement was not
given the TTM_PL_FLAG_DESIRED flag, and so eviction could be triggered
in that first pass. This caused thrashing, and a significant performance
regression on DG2 systems with small BAR. For example, Minecraft and
Team Fortress 2 would drop to single-digit framerates.
Restore the original behaviour by marking the initial placement as
desired on that first attempt. Also, rework this to use a separate
struct ttm_palcement, as the individual placements are marked 'const',
so hot-patching the flags is even more dodgy than before.
Thanks to Justin Brewer for bisecting this.
Fixes: a78a8da51b ("drm/ttm: replace busy placement with flags v6")
Link: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11255
Signed-off-by: David Gow <david@davidgow.net>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240804091851.122186-3-david@davidgow.net
(cherry picked from commit 92653f2a57)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
In commit a78a8da51b ("drm/ttm: replace busy placement with flags v6"),
the old system of having a separate placement list (for placements
which should be used without eviction) and a 'busy' placement list (for
placements which should be attempted if eviction is required) was
replaced with a new one where placements could be marked 'FALLBACK' (to
be attempted if eviction is required) or 'DESIRED' (to be attempted
first, but not if eviction is required).
i915 had always included the requested placement in the list of
'busy' placements: i.e., the placement could be used either if eviction
is required or not. But when the new system was put in place, the
requested (first) placement was marked 'DESIRED', so would never be used
if eviction became necessary. While a bug in the original commit
prevented this flag from working, when this was fixed in
4a0e7b3c ("drm/i915: fix applying placement flag"), it caused long hangs
on DG2 systems with small BAR.
Don't mark the requested placement DESIRED (or FALLBACK), allowing it to
be used in both situations. This matches the old behaviour, and resolves
the hangs.
Thanks to Justin Brewer for bisecting the issue.
Fixes: a78a8da51b ("drm/ttm: replace busy placement with flags v6")
Fixes: 4a0e7b3c37 ("drm/i915: fix applying placement flag")
Link: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11255
Signed-off-by: David Gow <david@davidgow.net>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240804091851.122186-2-david@davidgow.net
(cherry picked from commit 54bf0af908)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
In commit a78a8da51b ("drm/ttm: replace busy placement with flags v6"),
__i915_ttm_get_pages was updated to use flags instead of the separate
'busy' placement list. However, the behaviour was subtly changed.
Originally, the function would attempt to use the preferred placement
without eviction, and give an opportunity to restart the operation
before falling back to allowing eviction.
This was unintentionally changed, as the preferred placement was not
given the TTM_PL_FLAG_DESIRED flag, and so eviction could be triggered
in that first pass. This caused thrashing, and a significant performance
regression on DG2 systems with small BAR. For example, Minecraft and
Team Fortress 2 would drop to single-digit framerates.
Restore the original behaviour by marking the initial placement as
desired on that first attempt. Also, rework this to use a separate
struct ttm_palcement, as the individual placements are marked 'const',
so hot-patching the flags is even more dodgy than before.
Thanks to Justin Brewer for bisecting this.
Fixes: a78a8da51b ("drm/ttm: replace busy placement with flags v6")
Link: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11255
Signed-off-by: David Gow <david@davidgow.net>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240804091851.122186-3-david@davidgow.net
In commit a78a8da51b ("drm/ttm: replace busy placement with flags v6"),
the old system of having a separate placement list (for placements
which should be used without eviction) and a 'busy' placement list (for
placements which should be attempted if eviction is required) was
replaced with a new one where placements could be marked 'FALLBACK' (to
be attempted if eviction is required) or 'DESIRED' (to be attempted
first, but not if eviction is required).
i915 had always included the requested placement in the list of
'busy' placements: i.e., the placement could be used either if eviction
is required or not. But when the new system was put in place, the
requested (first) placement was marked 'DESIRED', so would never be used
if eviction became necessary. While a bug in the original commit
prevented this flag from working, when this was fixed in
4a0e7b3c ("drm/i915: fix applying placement flag"), it caused long hangs
on DG2 systems with small BAR.
Don't mark the requested placement DESIRED (or FALLBACK), allowing it to
be used in both situations. This matches the old behaviour, and resolves
the hangs.
Thanks to Justin Brewer for bisecting the issue.
Fixes: a78a8da51b ("drm/ttm: replace busy placement with flags v6")
Fixes: 4a0e7b3c37 ("drm/i915: fix applying placement flag")
Link: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11255
Signed-off-by: David Gow <david@davidgow.net>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240804091851.122186-2-david@davidgow.net
