diff options
| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2008-11-05 10:31:53 -0800 |
|---|---|---|
| committer | Dave Airlie <airlied@linux.ie> | 2008-12-29 17:47:22 +1000 |
| commit | a2c0a97b784f837300f7b0869c82ab712c600952 (patch) | |
| tree | aca1cdf3d32e1cfa7387350483f6a70c74a24ffd /drivers/gpu/drm/drm_fops.c | |
| parent | a9587470f753d670d910293ecbf1c7b66c99de50 (diff) | |
drm: GEM mmap support
Add core support for mapping of GEM objects. Drivers should provide a
vm_operations_struct if they want to support page faulting of objects.
The code for handling GEM object offsets was taken from TTM, which was
written by Thomas Hellström.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_fops.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fops.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c index f2285237df49..3a6c439652a5 100644 --- a/drivers/gpu/drm/drm_fops.c +++ b/drivers/gpu/drm/drm_fops.c @@ -133,11 +133,21 @@ int drm_open(struct inode *inode, struct file *filp) spin_lock(&dev->count_lock); if (!dev->open_count++) { spin_unlock(&dev->count_lock); - return drm_setup(dev); + retcode = drm_setup(dev); + goto out; } spin_unlock(&dev->count_lock); } +out: + mutex_lock(&dev->struct_mutex); + if (dev->dev_mapping == NULL) + dev->dev_mapping = inode->i_mapping; + else if (dev->dev_mapping != inode->i_mapping) + WARN(1, "dev->dev_mapping not inode mapping (%p expected %p)\n", + dev->dev_mapping, inode->i_mapping); + mutex_unlock(&dev->struct_mutex); + return retcode; } EXPORT_SYMBOL(drm_open); |