Fixes bug on Tegra where we'd strip kind information from system memory
(ie. all) buffers, resulting in misrendering.

Behaviour on dGPU should be unchanged.
Reported-by: NThierry Reding <treding@nvidia.com>
Fixes: d7722134 ("drm/nouveau: switch over to new memory and vmm interfaces")
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>
Tested-by: NThierry Reding <treding@nvidia.com>

While the Tegra (GK20A, GM20B, GP10B) MMUs support large pages in host
memory, we're currently lacking IOMMU support for merging system pages
into large enough chunks to be mapped as such by the GPU.

The core VMM code actually supports automatically determining the best
page size to map with, which is intended for these situations, but for
various complicated reasons the DRM is currently forcing the page size
selection on a per-BO basis.

This should fix breakage reported on Tegra GPUs in the meantime, until
one or both of the above issues are resolved properly.
Reported-by: NMikko Perttunen <cyndis@kapsi.fi>
Fixes: 7dc6a446 ("drm/nouveau: improve selection of GPU page size")
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>
Tested-by: NThierry Reding <treding@nvidia.com>

Reported-by: NMikko Perttunen <cyndis@kapsi.fi>
Fixes: 6359c982 ("drm/nouveau/mmu/gp10b: fork from gf100")
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>
Tested-by: NThierry Reding <treding@nvidia.com>

On my GP107 when I load nouveau after unloading it, for some reason the
GPU stopped sending or the CPU stopped receiving interrupts if MSI was
enabled.

Doing a rearm once before getting any interrupts fixes this.
Signed-off-by: NKarol Herbst <kherbst@redhat.com>
Reviewed-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Reported-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

When the fbcon object is initialized, but nouveau_fbcon_create is not
called, we run into a NULL pointer access within nouveau_fbcon_create when
unloading nouveau.

The call to drm_fb_helper_funcs.fb_probe is deferred until there is a
display for real since 4.14, that's why fbcon->helper.fb is still not set.
Signed-off-by: NKarol Herbst <kherbst@redhat.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Addresses-Coverity-ID: 1260018
Addresses-Coverity-ID: 1260019
Addresses-Coverity-ID: 1260022
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Addresses-Coverity-ID: 143119
Addresses-Coverity-ID: 143120
Addresses-Coverity-ID: 143121
Addresses-Coverity-ID: 143122
Addresses-Coverity-ID: 143123
Addresses-Coverity-ID: 143124
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Don't populate arrays hwsq_signature and edid_sig on the stack but
instead make them static. Makes the object code smaller by over 190
bytes:

Before:
   text    data     bss     dec     hex filename
  35676    3312      64   39052    988c nouveau_bios.o

After:
   text    data     bss     dec     hex filename
  35319    3472      64   38855    97c7 nouveau_bios.o

(gcc version 7.2.0 x86_64)
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Rounding value is guaranteed to be power-of-two, so this is better
anyway.

Fixes build on 32-bit.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Enables the use of Pascal's 2MiB pages for larger buffers.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

VMAs are about to not take references on the VMM they belong to, which
means more care is required when handling delayed unmapping.

Queuing it on the client workqueue ensures all pending VMA unmaps will
have completed before the VMM is destroyed.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

This is already handled in the top-level gem_new() ioctl in another manner,
but this will be removed in a future commit.

Ideally we'd not need to check up-front at all, and let the VMM code handle
error checking, but there are paths in the current BO management code where
this isn't possible due to map() not always being called during BO creation,
and map() calls not being allowed to fail during buffer migration.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

If the VMA is being deleted, we don't need to explicity unmap first
anymore.  The MMU code will automatically merge the operations into
a single page tree walk.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

Could be useful for if/when a future GPU removes support for the GF100
PT layout.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>