Commit c5d7ddf7 authored Oct 27, 2014 by Alexandre Courbot Committed by Ben Skeggs Dec 02, 2014

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>

parent 5be5a15a

drivers/gpu/drm/nouveau/core/include/core/device.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -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)
		{