From c5d7ddf70a8445f711f5ab9ab92bd4f59f993262 Mon Sep 17 00:00:00 2001 From: Alexandre Courbot Date: Mon, 27 Oct 2014 18:49:16 +0900 Subject: [PATCH] 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 Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/core/include/core/device.h | 6 ++++++ 1 file changed, 6 insertions(+) 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) { -- 2.7.4