aboutsummaryrefslogtreecommitdiff
path: root/bsd-core/drm_vm.c
diff options
context:
space:
mode:
Diffstat (limited to 'bsd-core/drm_vm.c')
-rw-r--r--bsd-core/drm_vm.c37
1 files changed, 30 insertions, 7 deletions
diff --git a/bsd-core/drm_vm.c b/bsd-core/drm_vm.c
index d9ee0b3d..da815329 100644
--- a/bsd-core/drm_vm.c
+++ b/bsd-core/drm_vm.c
@@ -1,3 +1,26 @@
+/*
+ * Copyright 2003 Eric Anholt
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
static int DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, vm_paddr_t *paddr,
@@ -9,12 +32,12 @@ static paddr_t DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, int prot)
#endif
{
DRM_DEVICE;
- drm_device_dma_t *dma = dev->dma;
- unsigned long physical;
- unsigned long page;
+ drm_device_dma_t *dma = dev->dma;
+ unsigned long physical;
+ unsigned long page;
- if (!dma) return -1; /* Error */
- if (!dma->pagelist) return -1; /* Nothing allocated */
+ if (dma == NULL || dma->pagelist == NULL)
+ return -1;
page = offset >> PAGE_SHIFT;
physical = dma->pagelist[page];
@@ -38,8 +61,8 @@ paddr_t DRM(mmap)(dev_t kdev, off_t offset, int prot)
#endif
{
DRM_DEVICE;
- drm_local_map_t *map = NULL;
- drm_map_list_entry_t *listentry=NULL;
+ drm_local_map_t *map = NULL;
+ drm_map_list_entry_t *listentry = NULL;
drm_file_t *priv;
priv = DRM(find_file_by_proc)(dev, DRM_CURPROC);