diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_gem.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_gem.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c index 2a6fbf101cf0..01b58941acd4 100644 --- a/drivers/gpu/drm/radeon/radeon_gem.c +++ b/drivers/gpu/drm/radeon/radeon_gem.c @@ -285,19 +285,24 @@ int radeon_gem_userptr_ioctl(struct drm_device *dev, void *data, if (offset_in_page(args->addr | args->size)) return -EINVAL; - /* we only support read only mappings for now */ - if (!(args->flags & RADEON_GEM_USERPTR_READONLY)) - return -EACCES; - /* reject unknown flag values */ if (args->flags & ~(RADEON_GEM_USERPTR_READONLY | RADEON_GEM_USERPTR_ANONONLY | RADEON_GEM_USERPTR_VALIDATE | RADEON_GEM_USERPTR_REGISTER)) return -EINVAL; - /* readonly pages not tested on older hardware */ - if (rdev->family < CHIP_R600) - return -EINVAL; + if (args->flags & RADEON_GEM_USERPTR_READONLY) { + /* readonly pages not tested on older hardware */ + if (rdev->family < CHIP_R600) + return -EINVAL; + + } else if (!(args->flags & RADEON_GEM_USERPTR_ANONONLY) || + !(args->flags & RADEON_GEM_USERPTR_REGISTER)) { + + /* if we want to write to it we must require anonymous + memory and install a MMU notifier */ + return -EACCES; + } down_read(&rdev->exclusive_lock); |
