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| author |   Jérôme Glisse <jglisse@redhat.com> | 2018-08-07 16:13:16 -0400 |
|---|---|---|
| committer |   Ben Skeggs <bskeggs@redhat.com> | 2019-02-20 09:00:03 +1000 |
| commit | f180bf12ac061f093abb9247505f661817973cae (patch) | |
| tree | 657b1189e1e51a9280d6d66d41b5335a85eb5e80 /drivers/gpu/drm/nouveau/nouveau_svm.h | |
| parent | drm/nouveau/dmem: device memory helpers for SVM (diff) | |
| download | linux-dev-f180bf12ac061f093abb9247505f661817973cae.tar.xz linux-dev-f180bf12ac061f093abb9247505f661817973cae.zip | |
drm/nouveau/svm: new ioctl to migrate process memory to GPU memory
This add an ioctl to migrate a range of process address space to the
device memory. On platform without cache coherent bus (x86, ARM, ...)
this means that CPU can not access that range directly, instead CPU
will fault which will migrate the memory back to system memory.
This is behind a staging flag so that we can evolve the API.
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_svm.h')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_svm.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.h b/drivers/gpu/drm/nouveau/nouveau_svm.h index 0379a1c316ca..e839d8189461 100644 --- a/drivers/gpu/drm/nouveau/nouveau_svm.h +++ b/drivers/gpu/drm/nouveau/nouveau_svm.h @@ -17,6 +17,7 @@ int nouveau_svmm_init(struct drm_device *, void *, struct drm_file *); void nouveau_svmm_fini(struct nouveau_svmm **); int nouveau_svmm_join(struct nouveau_svmm *, u64 inst); void nouveau_svmm_part(struct nouveau_svmm *, u64 inst); +int nouveau_svmm_bind(struct drm_device *, void *, struct drm_file *); #else /* IS_ENABLED(CONFIG_DRM_NOUVEAU_SVM) */ static inline void nouveau_svm_init(struct nouveau_drm *drm) {} static inline void nouveau_svm_fini(struct nouveau_drm *drm) {} @@ -37,5 +38,11 @@ static inline int nouveau_svmm_join(struct nouveau_svmm *svmm, u64 inst) } static inline void nouveau_svmm_part(struct nouveau_svmm *svmm, u64 inst) {} + +static inline int nouveau_svmm_bind(struct drm_device *device, void *p, + struct drm_file *file) +{ + return -ENOSYS; +} #endif /* IS_ENABLED(CONFIG_DRM_NOUVEAU_SVM) */ #endif |