accel-dp: formed skeleton

1 files changed, 94 insertions, 0 deletions

diff --git a/accel-dp/dev.c b/accel-dp/dev.c
new file mode 100644
index 0000000..d31773d
--- /dev/null
+++ b/accel-dp/dev.c
@@ -0,0 +1,94 @@
+#include <string.h>
+
+#include <rte_malloc.h>
+
+#include "init.h"
+#include "dev.h"
+
+#define DEV_MAX 65536
+
+static struct net_device **dev_list;
+static int next_idx = 1;
+
+struct net_device *netdev_get_by_index(int id)
+{
+	struct net_device *dev;
+
+	if (id <= 0 || id >= DEV_MAX)
+		return NULL;
+
+	dev = dev_list[id];
+
+	if (dev)
+		++dev->refs;
+
+	return dev;
+}
+
+struct net_device *netdev_alloc(const char *name, int priv_size, void (*setup)(struct net_device *dev))
+{
+	struct net_device *dev;
+	int i;
+
+	for (i = 0; i < DEV_MAX; i++) {
+		if (dev_list[i] && !strcmp(dev_list[i]->name, name))
+			return NULL;
+	}
+
+	for (; next_idx < DEV_MAX; next_idx++) {
+		if (!dev_list[next_idx])
+			break;
+	}
+
+	if (next_idx == DEV_MAX) {
+		for (next_idx = 1; next_idx < DEV_MAX; next_idx++) {
+			if (!dev_list[next_idx])
+				break;
+		}
+
+		if (next_idx == DEV_MAX)
+			return NULL;
+	}
+
+	dev = rte_malloc(NULL, sizeof(*dev) + priv_size, 0);
+	strcpy(dev->name, name);
+	dev->index = next_idx;
+
+	dev->refs = 1;
+	dev->destructor = netdev_free;
+
+	if (setup)
+		setup(dev);
+
+	dev_list[next_idx] = dev;
+
+	if (++next_idx == DEV_MAX)
+		next_idx = 1;
+
+	return dev;
+}
+
+void netdev_unregister(struct net_device *dev)
+{
+	dev_list[dev->index] = NULL;
+
+	netdev_put(dev);
+}
+
+void netdev_free(struct net_device *dev)
+{
+	rte_free(dev);
+}
+
+void netdev_put(struct net_device *dev)
+{
+	if (--dev->refs == 0)
+		dev->destructor(dev);
+}
+
+static void init()
+{
+	dev_list = rte_zmalloc(0, DEV_MAX * sizeof(void *), 0);
+}
+
+DEFINE_INIT(1, init);