From aff51175cdbf345740ec9203eff88e772af88059 Mon Sep 17 00:00:00 2001 From: Alexandre Courbot Date: Wed, 13 Jul 2016 15:29:36 +0900 Subject: [PATCH] drm/nouveau/bus: remove cpu_coherent flag This flag's only remaining function is to ignore the uncached flag for BOs on coherent architectures. However the reason for allocating an object uncache on a non-coherent architecture (namely because the cost of doing explicit flushes/ invalidations is higher than the benefit of caching the data because accesses are few and far between) should also apply on architectures for which coherency is maintained implicitly. Thus allocate coherent objects as uncached on all architectures. Signed-off-by: Alexandre Courbot Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/include/nvkm/core/device.h | 1 - drivers/gpu/drm/nouveau/nouveau_bo.c | 3 +-- drivers/gpu/drm/nouveau/nvkm/engine/device/pci.c | 1 - drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c | 1 - 4 files changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/gpu/drm/nouveau/include/nvkm/core/device.h b/drivers/gpu/drm/nouveau/include/nvkm/core/device.h index 6bc712f..7ea8aa7 100644 --- a/drivers/gpu/drm/nouveau/include/nvkm/core/device.h +++ b/drivers/gpu/drm/nouveau/include/nvkm/core/device.h @@ -175,7 +175,6 @@ struct nvkm_device_func { void (*fini)(struct nvkm_device *, bool suspend); resource_size_t (*resource_addr)(struct nvkm_device *, unsigned bar); resource_size_t (*resource_size)(struct nvkm_device *, unsigned bar); - bool cpu_coherent; }; struct nvkm_device_quirk { diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c index 7115927..fbb6036 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -209,8 +209,7 @@ nouveau_bo_new(struct drm_device *dev, int size, int align, nvbo->tile_flags = tile_flags; nvbo->bo.bdev = &drm->ttm.bdev; - if (!nvxx_device(&drm->device)->func->cpu_coherent) - nvbo->force_coherent = flags & TTM_PL_FLAG_UNCACHED; + nvbo->force_coherent = flags & TTM_PL_FLAG_UNCACHED; nvbo->page_shift = 12; if (drm->client.vm) { diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/pci.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/pci.c index 62ad030..b1b6932 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/device/pci.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/pci.c @@ -1614,7 +1614,6 @@ nvkm_device_pci_func = { .fini = nvkm_device_pci_fini, .resource_addr = nvkm_device_pci_resource_addr, .resource_size = nvkm_device_pci_resource_size, - .cpu_coherent = !IS_ENABLED(CONFIG_ARM), }; int diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c index 9b638bd..939682f 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c @@ -245,7 +245,6 @@ nvkm_device_tegra_func = { .fini = nvkm_device_tegra_fini, .resource_addr = nvkm_device_tegra_resource_addr, .resource_size = nvkm_device_tegra_resource_size, - .cpu_coherent = false, }; int -- 2.7.4