Create a kernel only internal memory region that uses ttm pool allocator to
allocate volatile system pages.
Refactor internal buffer backend to simply allocate from this new
region.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>

In commit 450cede7 ("drm/i915/gem: Fix the mman selftest") we fixed up
the mman selftest to allocate user buffers via smem only if we have lmem,
otherwise it uses internal buffers.

As the commit message asserts, we should only be using buffers that
userland should be able to create.
Internal buffers are not intended to be used by userland.

Instead, fix the code to always create buffers from smem.
In the case of integrated, this will create them from the shmem non-ttm
backend, which is fine.

This also fixes up the code to allow conversion of internal backend to
ttm without breaking this test.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>

Internal/volatile buffers should not be shmem backed.
If a volatile buffer is requested, allow ttm to use the pool allocator
to provide volatile pages as backing.
Fix i915_ttm_shrink to handle !is_shmem volatile buffers by purging.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>

Reorder scratch page allocation so that memory regions are available
to allocate the buffers

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

Internal gem objects will soon just be volatile system memory region
objects.
To enable this, create a separate dummy object creation function
for gen6 ppgtt. The object only exists as a fake object pointing to ggtt
and gains no benefit in going via the internal backend.
Instead, create a dummy gem object and avoid having to maintain a custom
ops api in the internal backend, which makes later refactoring easier.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>

By default i915_ttm_cache_level() decides I915_CACHE_LLC if HAS_SNOOP.
This is divergent from existing backends code which only considers
HAS_LLC.
Testing shows that trusting snooping on gen5- is unreliable and bsw via
ggtt mappings, so limit DGFX for now and maintain previous behaviour.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

i965G[M] cannot relocate objects above 4GiB.
Ensure ttm uses dma32 on these systems.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

Various places within the driver override the default chosen cache_level.
Before ttm, these overrides were permanent until explicitly changed again
or for the lifetime of the buffer.

TTM movement code came along and decided that it could make that
decision at that time, which is usually well after object creation, so
overrode the cache_level decision and reverted it back to its default
decision.

Add logic to indicate whether the caching mode has been set by anything
other than the move logic. If so, assume that the code that overrode the
defaults knows best and keep it.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

# Conflicts:
#	drivers/acpi/sleep.c
#	kernel/locking/lockdep.c
#	kernel/time/timer.c

# Conflicts:
#	drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
#	drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.h
#	drivers/gpu/drm/drm_aperture.c
#	drivers/gpu/drm/i915/display/intel_dp.c
#	drivers/gpu/drm/vc4/vc4_drv.c

On some machines hole_end can be small enough to cause subtraction
overflow. On the other side (addr + 2 * min_alignment) can overflow
in case of mock tests. This patch should handle both cases.

Fixes: e1c5f754 ("drm/i915: Avoid overflow in computing pot_hole loop termination")
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/3674


Signed-off-by: Andrzej Hajda <andrzej.hajda@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/20220624113528.2159210-1-andrzej.hajda@intel.com

If we encounter some monster sized local-memory page that exceeds the
maximum sg length (UINT32_MAX), ensure that don't end up with some
misaligned address in the entry that follows, leading to fireworks
later. Also ensure we have some coverage of this in the selftests.

v2(Chris):
  - Use round_down consistently to avoid udiv errors
v3(Nirmoy):
  - Also update the max_segment in the selftest

Fixes: f701b16d ("drm/i915/ttm: add i915_sg_from_buddy_resource")
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/6379


Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Nirmoy Das <nirmoy.das@linux.intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220711085859.24198-1-matthew.auld@intel.com

Considering the current adoption of the KUnit framework, convert the
DRM mm selftest to the KUnit API.

Signed-off-by: Arthur Grillo <arthur.grillo@usp.br>
Tested-by: David Gow <davidgow@google.com>
Acked-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Maíra Canal <maira.canal@usp.br>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708203052.236290-10-maira.canal@usp.br

Considering the current adoption of the KUnit framework, convert the
DRM buddy selftest to the KUnit API.

Tested-by: David Gow <davidgow@google.com>
Acked-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Maíra Canal <maira.canal@usp.br>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708203052.236290-9-maira.canal@usp.br

Considering the current adoption of the KUnit framework, convert the
DRM framebuffer selftest to the KUnit API.

Tested-by: David Gow <davidgow@google.com>
Acked-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Maíra Canal <maira.canal@usp.br>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708203052.236290-8-maira.canal@usp.br

Considering the current adoption of the KUnit framework, convert the
DRM DP MST helper selftest to the KUnit API.

Co-developed-by: Rubens Gomes Neto <rubens.gomes.neto@usp.br>
Signed-off-by: Rubens Gomes Neto <rubens.gomes.neto@usp.br>
Tested-by: David Gow <davidgow@google.com>
Acked-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Maíra Canal <maira.canal@usp.br>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708203052.236290-7-maira.canal@usp.br

Considering the current adoption of the KUnit framework, convert the
DRM plane helper selftest to the KUnit API.

Co-developed-by: Djakson C. G. Filho <djakson.filho@gmail.com>
Signed-off-by: Djakson C. G. Filho <djakson.filho@gmail.com>
Co-developed-by: Anderson Fraga <aaafraga@gmail.com>
Signed-off-by: Anderson Fraga <aaafraga@gmail.com>
Tested-by: David Gow <davidgow@google.com>
Acked-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Maíra Canal <maira.canal@usp.br>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708203052.236290-6-maira.canal@usp.br

Considering the current adoption of the KUnit framework, convert the
DRM format selftest to the KUnit API.

Tested-by: David Gow <davidgow@google.com>
Acked-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Maíra Canal <maira.canal@usp.br>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708203052.236290-5-maira.canal@usp.br

Considering the current adoption of the KUnit framework, convert the
DRM rect selftest to the KUnit API.

Co-developed-by: Carlos Veras <carlos.craveiro@usp.br>
Signed-off-by: Carlos Veras <carlos.craveiro@usp.br>
Co-developed-by: Matheus Vieira <matheus.vieira.g@usp.br>
Signed-off-by: Matheus Vieira <matheus.vieira.g@usp.br>
Tested-by: David Gow <davidgow@google.com>
Acked-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Maíra Canal <maira.canal@usp.br>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708203052.236290-4-maira.canal@usp.br

Considering the current adoption of the KUnit framework, convert the
DRM cmdline parser selftest to the KUnit API.

Co-developed-by: Arthur Grillo <arthur.grillo@usp.br>
Signed-off-by: Arthur Grillo <arthur.grillo@usp.br>
Tested-by: David Gow <davidgow@google.com>
Acked-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Maíra Canal <maira.canal@usp.br>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708203052.236290-3-maira.canal@usp.br

Considering the current adoption of the KUnit framework, convert the
DRM damage helper selftest to the KUnit API.

Co-developed-by: Arthur Grillo <arthur.grillo@usp.br>
Signed-off-by: Arthur Grillo <arthur.grillo@usp.br>
Tested-by: David Gow <davidgow@google.com>
Acked-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Maíra Canal <maira.canal@usp.br>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708203052.236290-2-maira.canal@usp.br

The shmem_pin_map() function doesn't return error pointers, it returns
NULL.

Fixes: be1cb55a ("drm/i915/gt: Keep a no-frills swappable copy of the default context state")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708094104.GL2316@kadam

Allow BOs to exist without backing store.

v2: handle ttm_bo_move_memcpy as well.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220707102453.3633-5-christian.koenig@amd.com

Make sure we can at least move and release BOs without backing store.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220707102453.3633-4-christian.koenig@amd.com

Make sure we can at least move and release BOs without backing store.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220707102453.3633-3-christian.koenig@amd.com

Rename ttm_bo_init to ttm_bo_init_validate since that better matches
what the function is actually doing.

Remove the unused size parameter, move the function's kerneldoc to the
implementation and cleanup the whole error handling.

Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220707102453.3633-2-christian.koenig@amd.com


Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>

This reverts commit 5e3f1e77.

This is part of a revert of the following commits:
commit 708d19d9 ("drm/amdgpu: move internal vram_mgr function into the C file")
commit 5e3f1e77 ("drm/amdgpu: fix start calculation in amdgpu_vram_mgr_new")
commit c9cad937 ("drm/amdgpu: add drm buddy support to amdgpu")

[WHY]
Few users reported garbaged graphics as soon as x starts,
reverting until this can be resolved.

Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708093047.492662-2-Arunpravin.PaneerSelvam@amd.com

This reverts commit 708d19d9.

This is part of a revert of the following commits:
commit 708d19d9 ("drm/amdgpu: move internal vram_mgr function into the C file")
commit 5e3f1e77 ("drm/amdgpu: fix start calculation in amdgpu_vram_mgr_new")
commit c9cad937 ("drm/amdgpu: add drm buddy support to amdgpu")

[WHY]
Few users reported garbaged graphics as soon as x starts,
reverting until this can be resolved.

Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708093047.492662-1-Arunpravin.PaneerSelvam@amd.com

- Use DEFINE_SIMPLE_DEV_PM_OPS() instead of the SIMPLE_DEV_PM_OPS()
  macro. This makes it possible to remove the __maybe_unused flags on
  the callback functions.
- Since we only have callbacks for suspend/resume, we can conditionally
  compile the dev_pm_ops structure for when CONFIG_PM_SLEEP is enabled;
  so use the pm_sleep_ptr() macro instead of pm_ptr().

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708205406.96473-7-paul@crapouillou.net

Avoid requesting a full modeset if the sharpness property is not
modified, because then we don't actually need it.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708205406.96473-5-paul@crapouillou.net

Add support for the JZ4760 and JZ4760B SoCs to the ingenic-drm display
driver.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708205406.96473-4-paul@crapouillou.net

The previous "GPL v2" string is deprecated. For more info, see commit
bf7fbeea ("module: Cure the MODULE_LICENSE "GPL" vs. "GPL v2" bogosity")

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708205406.96473-3-paul@crapouillou.net

Add compatible strings for the LCD controllers found in the JZ4760 and
JZ4760B SoCs from Ingenic.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: devicetree@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20220708205406.96473-2-paul@crapouillou.net