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| author | Alexandre Courbot <acourbot@nvidia.com> | 2014-10-27 18:49:16 +0900 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2014-12-02 15:43:59 +1000 |
| commit | c5d7ddf70a8445f711f5ab9ab92bd4f59f993262 (patch) | |
| tree | eb8202e6d766ab0e7879e4b4ee031ea46edb6cbd /drivers/gpu/drm/nouveau/core | |
| parent | 5be5a15a43642de7e10d17da0c172ea2d28d22c4 (diff) | |
| download | op-kernel-dev-c5d7ddf70a8445f711f5ab9ab92bd4f59f993262.zip op-kernel-dev-c5d7ddf70a8445f711f5ab9ab92bd4f59f993262.tar.gz | |
drm/nouveau: introduce nv_device_is_cpu_coherent()
Add a function allowing us to know whether a device is CPU-coherent,
i.e. accesses performed by the CPU on GPU-mapped buffers will
be immediately visible on the GPU side and vice-versa.
For now, a device is considered to be coherent if it uses the PCI bus on
a non-ARM architecture.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/core')
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/include/core/device.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/include/core/device.h b/drivers/gpu/drm/nouveau/core/include/core/device.h index 1d9d893..0d839e1 100644 --- a/drivers/gpu/drm/nouveau/core/include/core/device.h +++ b/drivers/gpu/drm/nouveau/core/include/core/device.h @@ -158,6 +158,12 @@ nv_device_is_pci(struct nouveau_device *device) return device->pdev != NULL; } +static inline bool +nv_device_is_cpu_coherent(struct nouveau_device *device) +{ + return (!IS_ENABLED(CONFIG_ARM) && nv_device_is_pci(device)); +} + static inline struct device * nv_device_base(struct nouveau_device *device) { |
