summaryrefslogtreecommitdiff
path: root/linux-core/drm_bufs.c
diff options
context:
space:
mode:
Diffstat (limited to 'linux-core/drm_bufs.c')
-rw-r--r--linux-core/drm_bufs.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/linux-core/drm_bufs.c b/linux-core/drm_bufs.c
index abd7c829..a2a3dbf7 100644
--- a/linux-core/drm_bufs.c
+++ b/linux-core/drm_bufs.c
@@ -942,6 +942,9 @@ int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request)
request->count = entry->buf_count;
request->size = size;
+ if (request->flags & _DRM_PCI_BUFFER_RO)
+ dma->flags = _DRM_DMA_USE_PCI_RO;
+
atomic_dec(&dev->buf_alloc);
return 0;
@@ -1528,9 +1531,10 @@ int drm_freebufs(struct inode *inode, struct file *filp,
* \param arg pointer to a drm_buf_map structure.
* \return zero on success or a negative number on failure.
*
- * Maps the AGP or SG buffer region with do_mmap(), and copies information
- * about each buffer into user space. The PCI buffers are already mapped on the
- * addbufs_pci() call.
+ * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information
+ * about each buffer into user space. For PCI buffers, it calls do_mmap() with
+ * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls
+ * drm_mmap_dma().
*/
int drm_mapbufs(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)