Add dma_buf export API by physical addressv1.1.3

Add an API to export BMM buffers by passing in a physical address.
This allows a BMM buffer without a virtual mapping to be passed to
other device drivers.

1 files changed, 17 insertions, 0 deletions

diff --git a/bmm_lib.c b/bmm_lib.c
index 72f5301..d6a3271 100644
--- a/bmm_lib.c
+++ b/bmm_lib.c
@@ -565,6 +565,23 @@ int bmm_get_dmabuf_fd(void *vaddr)
 	return ret < 0 ? -1 : io.output;
 }
 
+int bmm_get_phys_dmabuf_fd(unsigned long paddr)
+{
+	int ret;
+	ioctl_arg_t io;
+
+	if (bmm_init() < 0 || API_FEAT(bmm_api) < API_FEAT_GET_DMABUF_FD)
+		return -1;
+
+	io.input = paddr;
+	io.output = 0;
+	io.arg = 0;
+
+	ret = ioctl(bmm_fd, BMM_GET_PHYS_DMABUF_FD, &io);
+
+	return ret < 0 ? -1 : io.output;
+}
+
 unsigned long bmm_get_mem_size(void *vaddr)
 {
 	struct bmm_virt_buffer *vbuf;