参照元†
- struct ion_client *client
- struct ion_handle *handle
返り値†
struct dma_buf *ion_share_dma_buf(struct ion_client *client,
struct ion_handle *handle)
{
DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
struct ion_buffer *buffer;
struct dma_buf *dmabuf;
bool valid_handle;
mutex_lock(&client->lock);
valid_handle = ion_handle_validate(client, handle);
if (!valid_handle) {
WARN(1, "%s: invalid handle passed to share.\n", __func__);
mutex_unlock(&client->lock);
return ERR_PTR(-EINVAL);
}
buffer = handle->buffer;
ion_buffer_get(buffer);
mutex_unlock(&client->lock);
exp_info.ops = &dma_buf_ops;
exp_info.size = buffer->size;
exp_info.flags = O_RDWR;
exp_info.priv = buffer;
dmabuf = dma_buf_export(&exp_info);
if (IS_ERR(dmabuf)) {
ion_buffer_put(buffer);
return dmabuf;
}
return dmabuf;
}
EXPORT_SYMBOL(ion_share_dma_buf);
コメント†