diff options
Diffstat (limited to 'bsd-core/drm_dma.c')
| -rw-r--r-- | bsd-core/drm_dma.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/bsd-core/drm_dma.c b/bsd-core/drm_dma.c index fc1e1250..71ef845b 100644 --- a/bsd-core/drm_dma.c +++ b/bsd-core/drm_dma.c @@ -1,6 +1,3 @@ -/* drm_dma.c -- DMA IOCTL and function support -*- linux-c -*- - * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com - */ /*- * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. @@ -31,6 +28,14 @@ * */ +/** @file drm_dma.c + * Support code for DMA buffer management. + * + * The implementation used to be significantly more complicated, but the + * complexity has been moved into the drivers as different buffer management + * schemes evolved. + */ + #include "drmP.h" int drm_dma_setup(drm_device_t *dev) @@ -121,6 +126,7 @@ int drm_dma(drm_device_t *dev, void *data, struct drm_file *file_priv) { if (dev->driver.dma_ioctl) { + /* shared code returns -errno */ return -dev->driver.dma_ioctl(dev, data, file_priv); } else { DRM_DEBUG("DMA ioctl on driver with no dma handler\n"); |