diff options
| author | Alexandre Courbot <acourbot@nvidia.com> | 2014-10-27 18:49:19 +0900 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2014-12-02 15:44:00 +1000 |
| commit | b22870ba6a5c7bd4380f224eeabf335b1f8792b3 (patch) | |
| tree | b967fb75ea6f4e9500a02297246bdf95c116f19f /drivers/gpu/drm/nouveau/nouveau_gem.c | |
| parent | a81349a7b27adc66cc318ac0bc0f657b0b73a5af (diff) | |
drm/nouveau: synchronize BOs when required
On architectures for which access to GPU memory is non-coherent,
caches need to be flushed and invalidated explicitly when BO control
changes between CPU and GPU.
This patch adds buffer synchronization functions which invokes the
correct API (PCI or DMA) to ensure synchronization is effective.
Based on the TTM DMA cache helper patches by Lucas Stach.
Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_gem.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_gem.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c index ebba9deb0d0..28d51a22a4b 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.c +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c @@ -870,6 +870,7 @@ nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data, else ret = lret; } + nouveau_bo_sync_for_cpu(nvbo); drm_gem_object_unreference_unlocked(gem); return ret; @@ -879,6 +880,17 @@ int nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data, struct drm_file *file_priv) { + struct drm_nouveau_gem_cpu_fini *req = data; + struct drm_gem_object *gem; + struct nouveau_bo *nvbo; + + gem = drm_gem_object_lookup(dev, file_priv, req->handle); + if (!gem) + return -ENOENT; + nvbo = nouveau_gem_object(gem); + + nouveau_bo_sync_for_device(nvbo); + drm_gem_object_unreference_unlocked(gem); return 0; } |