static int omap_gem_dmabuf_mmap(struct dma_buf *buffer,
struct vm_area_struct *vma)
{
struct drm_gem_object *obj = buffer->priv;
int ret = 0;
ret = drm_gem_mmap_obj(obj, omap_gem_mmap_size(obj), vma);
if (ret < 0)
return ret;
return omap_gem_mmap_obj(obj, vma);
}
static int omap_gem_dmabuf_mmap(struct dma_buf *buffer,
struct vm_area_struct *vma)
{
struct drm_gem_object *obj = buffer->priv;
struct drm_device *dev = obj->dev;
int ret = 0;
if (WARN_ON(!obj->filp))
return -EINVAL;
mutex_lock(&dev->struct_mutex);
ret = drm_gem_mmap_obj(obj, omap_gem_mmap_size(obj), vma);
mutex_unlock(&dev->struct_mutex);
if (ret < 0)
return ret;
return omap_gem_mmap_obj(obj, vma);
}
/*
* TODO maybe we can split up drm_gem_mmap to avoid duplicating
* some here.. or at least have a drm_dmabuf_mmap helper.
*/
static int omap_gem_dmabuf_mmap(struct dma_buf *buffer,
struct vm_area_struct *vma)
{
struct drm_gem_object *obj = buffer->priv;
int ret = 0;
if (WARN_ON(!obj->filp))
return -EINVAL;
/* Check for valid size. */
if (omap_gem_mmap_size(obj) < vma->vm_end - vma->vm_start) {
ret = -EINVAL;
goto out_unlock;
}
if (!obj->dev->driver->gem_vm_ops) {
ret = -EINVAL;
goto out_unlock;
}
vma->vm_flags |= VM_RESERVED | VM_IO | VM_PFNMAP | VM_DONTEXPAND;
vma->vm_ops = obj->dev->driver->gem_vm_ops;
vma->vm_private_data = obj;
vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
/* Take a ref for this mapping of the object, so that the fault
* handler can dereference the mmap offset's pointer to the object.
* This reference is cleaned up by the corresponding vm_close
* (which should happen whether the vma was created by this call, or
* by a vm_open due to mremap or partial unmap or whatever).
*/
vma->vm_ops->open(vma);
out_unlock:
return omap_gem_mmap_obj(obj, vma);
}
