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linux-next/drivers/gpu/drm/nouveau/Kconfig
Ben Skeggs eb813999f2 drm/nouveau/mmu: implement new vmm backend
This is the common code to support a rework of the VMM backends.

It adds support for more than 2 levels of page table nesting, which
is required to be able to support GP100's MMU layout.

Sparse mappings (that don't cause MMU faults when accessed) are now
supported, where the backend provides it.

Dual-PT handling had to become more sophisticated to support sparse,
but this also allows us to support an optimisation the MMU provides
on GK104 and newer.

Certain operations can now be combined into a single page tree walk
to avoid some overhead, but also enables optimsations like skipping
PTE unmap writes when the PT will be destroyed anyway.

The old backend has been hacked up to forward requests onto the new
backend, if present, so that it's possible to bisect between issues
in the backend changes vs the upcoming frontend changes.

Until the new frontend has been merged, new backends will leak BAR2
page tables on module unload.  This is expected, and it's not worth
the effort of hacking around this as it doesn't effect runtime.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-11-02 13:32:27 +10:00

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config DRM_NOUVEAU
tristate "Nouveau (NVIDIA) cards"
depends on DRM && PCI && MMU
select FW_LOADER
select DRM_KMS_HELPER
select DRM_TTM
select FB_BACKLIGHT if DRM_NOUVEAU_BACKLIGHT
select ACPI_VIDEO if ACPI && X86 && BACKLIGHT_CLASS_DEVICE && INPUT
select X86_PLATFORM_DEVICES if ACPI && X86
select ACPI_WMI if ACPI && X86
select MXM_WMI if ACPI && X86
select POWER_SUPPLY
# Similar to i915, we need to select ACPI_VIDEO and it's dependencies
select BACKLIGHT_LCD_SUPPORT if ACPI && X86
select BACKLIGHT_CLASS_DEVICE if ACPI && X86
select INPUT if ACPI && X86
select THERMAL if ACPI && X86
select ACPI_VIDEO if ACPI && X86
select DRM_VM
help
Choose this option for open-source NVIDIA support.
config NOUVEAU_PLATFORM_DRIVER
bool "Nouveau (NVIDIA) SoC GPUs"
depends on DRM_NOUVEAU && ARCH_TEGRA
default y
help
Support for Nouveau platform driver, used for SoC GPUs as found
on NVIDIA Tegra K1.
config NOUVEAU_DEBUG
int "Maximum debug level"
depends on DRM_NOUVEAU
range 0 7
default 5
help
Selects the maximum debug level to compile support for.
0 - fatal
1 - error
2 - warning
3 - info
4 - debug
5 - trace (recommended)
6 - paranoia
7 - spam
The paranoia and spam levels will add a lot of extra checks which
may potentially slow down driver operation.
config NOUVEAU_DEBUG_DEFAULT
int "Default debug level"
depends on DRM_NOUVEAU
range 0 7
default 3
help
Selects the default debug level
config NOUVEAU_DEBUG_MMU
bool "Enable additional MMU debugging"
depends on DRM_NOUVEAU
default n
help
Say Y here if you want to enable verbose MMU debug output.
config DRM_NOUVEAU_BACKLIGHT
bool "Support for backlight control"
depends on DRM_NOUVEAU
default y
help
Say Y here if you want to control the backlight of your display
(e.g. a laptop panel).