Add DMA tag management to the C library and Python binding.

1 files changed, 61 insertions, 0 deletions

diff --git a/tools/bus_space/Python/lang.c b/tools/bus_space/Python/lang.c
index f328a77..a515549 100644
--- a/tools/bus_space/Python/lang.c
+++ b/tools/bus_space/Python/lang.c
@@ -30,6 +30,7 @@ __FBSDID("$FreeBSD$");
 #include <Python.h>
 
 #include "bus_space.h"
+#include "busdma.h"
 
 static PyObject *
 bus_read_1(PyObject *self, PyObject *args)
@@ -173,6 +174,58 @@ bus_subregion(PyObject *self, PyObject *args)
 	return (Py_BuildValue("i", rid));
 }
 
+static PyObject *
+busdma_tag_create(PyObject *self, PyObject *args)
+{
+	char *dev;
+	long align, bndry, maxaddr, maxsz, maxsegsz;
+	int tid, nsegs, datarate, flags;
+
+	if (!PyArg_ParseTuple(args, "sllllilii", &dev, &align, &bndry,
+	    &maxaddr, &maxsz, &nsegs, &maxsegsz, &datarate, &flags))
+                return (NULL);
+	tid = bd_tag_create(dev, align, bndry, maxaddr, maxsz, nsegs,
+	    maxsegsz, datarate, flags);
+	if (tid == -1) {
+		PyErr_SetString(PyExc_IOError, strerror(errno));
+		return (NULL);
+	}
+	return (Py_BuildValue("i", tid));
+}
+
+static PyObject *
+busdma_tag_derive(PyObject *self, PyObject *args)
+{
+	long align, bndry, maxaddr, maxsz, maxsegsz;
+	int ptid, tid, nsegs, datarate, flags;
+ 
+	if (!PyArg_ParseTuple(args, "illllilii", &ptid, &align, &bndry,
+	    &maxaddr, &maxsz, &nsegs, &maxsegsz, &datarate, &flags))
+		return (NULL);
+	tid = bd_tag_derive(ptid, align, bndry, maxaddr, maxsz, nsegs,
+	    maxsegsz, datarate, flags);
+	if (tid == -1) {
+		PyErr_SetString(PyExc_IOError, strerror(errno));
+		return (NULL);
+	}
+	return (Py_BuildValue("i", tid));
+}
+
+static PyObject *
+busdma_tag_destroy(PyObject *self, PyObject *args)
+{
+	int error, tid;
+ 
+	if (!PyArg_ParseTuple(args, "i", &tid))
+		return (NULL);
+	error = bd_tag_destroy(tid);
+	if (error) {
+		PyErr_SetString(PyExc_IOError, strerror(error));
+		return (NULL);
+	}
+	Py_RETURN_NONE;
+}
+
 static PyMethodDef bus_space_methods[] = {
     { "read_1", bus_read_1, METH_VARARGS, "Read a 1-byte data item." },
     { "read_2", bus_read_2, METH_VARARGS, "Read a 2-byte data item." },
@@ -192,9 +245,17 @@ static PyMethodDef bus_space_methods[] = {
     { NULL, NULL, 0, NULL }
 };
 
+static PyMethodDef busdma_methods[] = {
+    { "tag_create", busdma_tag_create, METH_VARARGS, "Create a root tag." },
+    { "tag_derive", busdma_tag_derive, METH_VARARGS, "Derive a child tag." },
+    { "tag_destroy", busdma_tag_destroy, METH_VARARGS, "Destroy a tag." },
+    { NULL, NULL, 0, NULL }
+};
+
 PyMODINIT_FUNC
 initbus_space(void)
 {
 
 	Py_InitModule("bus_space", bus_space_methods);
+	Py_InitModule("busdma", busdma_methods);
 }