drm/nouveau/fb/tu102-: prepare for GSP-RM

- add (initial) R535 implementation of FB, need VRAM size etc for boot
- expose a way to "wrap" vram at a specific address/size as a standard
nvkm_memory allocation, which will be used to write PTEs etc for RM-
defined memory regions

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230918202149.4343-11-skeggsb@gmail.com

drm/nouveau/imem: allow bar2 mapping of user allocations

Will be used to init client-allocated USERD to default values.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

drm/nouveau/fb: protect vram mm with private mutex

nvkm_subdev.mutex is going away.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

drm/nouveau/bios: translate additional memory types

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

drm/nouveau/mmu: remove old vmm frontend

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

drm/nouveau/fb/ram: use new interfaces for vmm operations

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

drm/nouveau: wrap nvkm_mem objects in nvkm_memory interfaces

This is a transition step, to enable finer-grained commits while
transitioning to new MMU interfaces.

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

drm/nouveau/fb/ram: add interface to allocate vram as an nvkm_memory object

Upcoming MMU changes use nvkm_memory as its basic representation of memory,
so we need to be able to allocate VRAM like this.

The code is basically identical to the current chipset-specific allocators,
minus support for compression tags (which will be handled elsewhere anyway).

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

drm/nouveau/fb: move comptag init out of ram submodule

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

drm/nouveau/fb: move comptags mm into nvkm_fb

We're moving towards having a central place to handle comptag allocation,
and as some GPUs don't have a ram submodule (ie. Tegra), we need to move
the mm somewhere else.

It probably never belonged in ram anyways.

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

drm/nouveau/core/mm: have users explicitly define heap identifiers

Different sections of VRAM may have different properties (ie. can't be used
for compression/display, can't be mapped, etc).

We currently already support this, but it's a bit magic. This change makes
it more obvious where we're allocating from.

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

drm/nouveau/fb: transition nvkm_ram away from being based on nvkm_object

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