linux-toradex.git/drivers/gpu/drm/nouveau/include/nvif, branch master

nouveau: add a third state to the fini handler.

2026-02-04T02:17:43+00:00

This is just refactoring to allow the lower layers to distinguish
between suspend and runtime suspend.

GSP 570 needs to set a flag with the GPU is going into GCOFF,
this flag taken from the opengpu driver is set whenever runtime
suspend is enterning GCOFF but not for normal suspend paths.

This just refactors the code, a subsequent patch use the information.

Fixes: 53dac0623853 ("drm/nouveau/gsp: add support for 570.144")
Cc: 
Reviewed-by: Lyude Paul 
Tested-by: Lyude Paul 
Signed-off-by: Dave Airlie 
Link: https://patch.msgid.link/20260203052431.2219998-3-airlied@gmail.com

drm/nouveau/kms: add support for GB20x

2025-05-18T21:14:45+00:00

Adds basic support for the new display classes available on GB20x GPUs.

Most of the changes here deal with HW method moves, with the only other
change of note being tweaks to skip allocation of CTXDMA objects, which
aren't required on Blackwell display.

Signed-off-by: Ben Skeggs 
Reviewed-by: Dave Airlie 
Reviewed-by: Timur Tabi 
Tested-by: Timur Tabi 
Signed-off-by: Dave Airlie

drm/nouveau: add support for GB20x

2025-05-18T21:14:45+00:00

This commit adds support for the GB20x GPUs found on GeForce RTX 50xx
series boards.

Beyond a few miscellaneous register moves and HW class ID plumbing,
this reuses most of the code added to support GH100/GB10x.

Signed-off-by: Ben Skeggs 
Reviewed-by: Dave Airlie 
Reviewed-by: Timur Tabi 
Tested-by: Timur Tabi 
Signed-off-by: Dave Airlie

drm/nouveau: add support for GB10x

2025-05-18T21:14:44+00:00

This commit enables basic support for the GB100/GB102 Blackwell GPUs.

Beyond HW class ID plumbing there's very little change here vs GH100.

Signed-off-by: Ben Skeggs 
Reviewed-by: Dave Airlie 
Reviewed-by: Timur Tabi 
Tested-by: Timur Tabi 
Signed-off-by: Dave Airlie

drm/nouveau/gf100-: track chan progress with non-WFI semaphore release

2025-05-18T21:14:44+00:00

From VOLTA_CHANNEL_GPFIFO_A onwards, HW no longer updates the GET/GP_GET
pointers in USERD following channel progress, but instead updates on a
timer for compatibility, and SW is expected to implement its own method
of tracking channel progress (typically via non-WFI semaphore release).

Nouveau has been making use of the compatibility mode up until now,
however, from BLACKWELL_CHANNEL_GPFIFO_A HW no longer supports USERD
writeback at all.

Allocate a per-channel buffer in system memory, and append a non-WFI
semaphore release to the end of each push buffer segment to simulate
the pointers previously read from USERD.

This change is implemented for Fermi (which is the first to support non-
WFI semaphore release) onwards, as readback from system memory is likely
faster than BAR1 reads.

Signed-off-by: Ben Skeggs 
Reviewed-by: Dave Airlie 
Reviewed-by: Timur Tabi 
Tested-by: Timur Tabi 
Signed-off-by: Dave Airlie

drm/nouveau/nv50-: separate CHANNEL_GPFIFO handling out from CHANNEL_DMA

2025-05-18T21:14:44+00:00

Primarily a cleanup to allow for changes in newer CHANNEL_GPFIFO classes
to be more easily implemented.

Compared to the prior implementation, this submits userspace push buffer
segments as subroutines and uses the NV_RAMUSERD_TOP_LEVEL_GET registers
to track the main (kernel) push buffer progress.

Fixes a number of sporadic failures seen during piglit runs.

Signed-off-by: Ben Skeggs 
Reviewed-by: Dave Airlie 
Reviewed-by: Timur Tabi 
Tested-by: Timur Tabi 
Signed-off-by: Dave Airlie

drm/nouveau: add support for GH100

2025-05-18T21:14:44+00:00

This commit enables basic support for Hopper GPUs, and is intended
primarily as a base supporting Blackwell GPUs, which reuse most of
the code added here.

Advanced features such as Confidential Compute are not supported.

Beyond a few miscellaneous register moves and HW class ID plumbing,
the bulk of the changes implemented here are to support the GSP-RM
boot sequence used on Hopper/Blackwell GPUs, as well as a new page
table layout.

There should be no changes here that impact prior GPUs.

Signed-off-by: Ben Skeggs 
Co-developed-by: Timur Tabi 
Signed-off-by: Timur Tabi 
Reviewed-by: Dave Airlie 
Reviewed-by: Timur Tabi 
Tested-by: Timur Tabi 
Signed-off-by: Dave Airlie

drm/nouveau/gv100-: switch to volta semaphore methods

2025-05-18T20:29:26+00:00

HOPPER_CHANNEL_GPFIFO_A removes the SEMAPHORE[A-D] methods that are
currently used by nouveau to implement fences on GF100 and newer.

Switch to the newer SEM methods available from VOLTA_CHANNEL_GPFIFO,
which are also available on the Hopper/Blackwell host classes.

Signed-off-by: Ben Skeggs 
Reviewed-by: Dave Airlie 
Reviewed-by: Timur Tabi 
Tested-by: Timur Tabi 
Signed-off-by: Dave Airlie

drm/nouveau/gsp: add common code for engines/engine objects

2025-05-18T20:29:24+00:00

With minimal to no direct HW programming required, most nvkm_engine
implementations are nearly identical when running on top of GSP-RM.

Add a common implementation of the boilerplate, and use nvkm_rm_gpu to
expose the correct class IDs.

As they're now handled by common code, and there's no support for them
prior to GSP-RM support - this deletes the GA100 NVDEC/NVJPG/OFA HALs,
the GA102 NVENC/OFA HALs, and the AD102 GR/NVDEC/NVENC/NVJPG/OFA HALs.

Signed-off-by: Ben Skeggs 
Reviewed-by: Dave Airlie 
Reviewed-by: Timur Tabi 
Tested-by: Timur Tabi 
Signed-off-by: Dave Airlie

drm/nouveau: Avoid multiple -Wflex-array-member-not-at-end warnings

2025-02-27T18:16:43+00:00

-Wflex-array-member-not-at-end was introduced in GCC-14, and we are
getting ready to enable it, globally.

So, in order to avoid ending up with flexible-array members in the
middle of other structs, we use the `struct_group_tagged()` helper
to separate the flexible arrays from the rest of the members in the
flexible structures. We then use the newly created tagged `struct
nvif_ioctl_v0_hdr` and `struct nvif_ioctl_mthd_v0_hdr` to replace the
type of the objects causing trouble in multiple structures.

We also want to ensure that when new members need to be added to the
flexible structures, they are always included within the newly created
tagged structs. For this, we use `static_assert()`. This ensures that the
memory layout for both the flexible structure and the new tagged struct
is the same after any changes.

So, with these changes, fix the following warnings:
drivers/gpu/drm/nouveau/nvif/object.c:60:38: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/gpu/drm/nouveau/nvif/object.c:233:38: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/gpu/drm/nouveau/nvif/object.c:214:38: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/gpu/drm/nouveau/nvif/object.c:152:38: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/gpu/drm/nouveau/nvif/object.c:138:38: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/gpu/drm/nouveau/nvif/object.c:104:38: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/gpu/drm/nouveau/nouveau_svm.c:83:35: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/gpu/drm/nouveau/nouveau_svm.c:82:30: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]

Signed-off-by: Gustavo A. R. Silva 
Acked-by: Dave Airlie 
Signed-off-by: Danilo Krummrich 
Link: https://patchwork.freedesktop.org/patch/msgid/Z6xjZhHxRp4Bu_SX@kspp