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| author | Asahi Lina <lina+kernel@asahilina.net> | 2026-04-09 15:26:06 +0000 |
|---|---|---|
| committer | Danilo Krummrich <dakr@kernel.org> | 2026-05-05 12:52:49 +0200 |
| commit | 82b78182eacf82c1847c6f1fd93d91c15efb69cf (patch) | |
| tree | 9c82b56ad44e7624b8797423e9ad66eea5a6bbbe /rust/helpers | |
| parent | c2d72717e0a9dd01c6a1bac61a1462a8e04bd179 (diff) | |
| download | linux-stable-82b78182eacf82c1847c6f1fd93d91c15efb69cf.tar.gz linux-stable-82b78182eacf82c1847c6f1fd93d91c15efb69cf.zip | |
rust: drm: add base GPUVM immediate mode abstraction
Add a GPUVM abstraction to be used by Rust GPU drivers.
GPUVM keeps track of a GPU's virtual address (VA) space and manages the
corresponding virtual mappings represented by "GPU VA" objects. It also
keeps track of the gem::Object<T> used to back the mappings through
GpuVmBo<T>.
This abstraction is only usable by drivers that wish to use GPUVM in
immediate mode. This allows us to build the locking scheme into the API
design. It means that the GEM mutex is used for the GEM gpuva list, and
that the resv lock is used for the extobj list. The evicted list is not
yet used in this version.
This abstraction provides a special handle called the UniqueRefGpuVm,
which is a wrapper around ARef<GpuVm> that provides access to the
interval tree. Generally, all changes to the address space requires
mutable access to this unique handle.
Signed-off-by: Asahi Lina <lina+kernel@asahilina.net>
Co-developed-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Daniel Almeida <daniel.almeida@collabora.com>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Co-developed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Link: https://patch.msgid.link/20260409-gpuvm-rust-v6-1-b16e6ada7261@google.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Diffstat (limited to 'rust/helpers')
| -rw-r--r-- | rust/helpers/drm_gpuvm.c | 20 | ||||
| -rw-r--r-- | rust/helpers/helpers.c | 1 |
2 files changed, 21 insertions, 0 deletions
diff --git a/rust/helpers/drm_gpuvm.c b/rust/helpers/drm_gpuvm.c new file mode 100644 index 000000000000..18cf104a8bc7 --- /dev/null +++ b/rust/helpers/drm_gpuvm.c @@ -0,0 +1,20 @@ +// SPDX-License-Identifier: GPL-2.0 or MIT + +#ifdef CONFIG_DRM_GPUVM + +#include <drm/drm_gpuvm.h> + +__rust_helper +struct drm_gpuvm *rust_helper_drm_gpuvm_get(struct drm_gpuvm *obj) +{ + return drm_gpuvm_get(obj); +} + +__rust_helper +bool rust_helper_drm_gpuvm_is_extobj(struct drm_gpuvm *gpuvm, + struct drm_gem_object *obj) +{ + return drm_gpuvm_is_extobj(gpuvm, obj); +} + +#endif // CONFIG_DRM_GPUVM diff --git a/rust/helpers/helpers.c b/rust/helpers/helpers.c index 625921e27dfb..4488a87223b9 100644 --- a/rust/helpers/helpers.c +++ b/rust/helpers/helpers.c @@ -59,6 +59,7 @@ #include "dma.c" #include "dma-resv.c" #include "drm.c" +#include "drm_gpuvm.c" #include "err.c" #include "irq.c" #include "fs.c" |