1 files changed, 154 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/usnic/usnic_debugfs.c b/drivers/infiniband/hw/usnic/usnic_debugfs.c
new file mode 100644
index 000000000000..5d13860161a4
--- /dev/null
+++ b/drivers/infiniband/hw/usnic/usnic_debugfs.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/debugfs.h>
+#include <linux/module.h>
+
+#include "usnic.h"
+#include "usnic_log.h"
+#include "usnic_debugfs.h"
+#include "usnic_ib_qp_grp.h"
+#include "usnic_transport.h"
+
+static struct dentry *debugfs_root;
+static struct dentry *flows_dentry;
+
+static ssize_t usnic_debugfs_buildinfo_read(struct file *f, char __user *data,
+						size_t count, loff_t *ppos)
+{
+	char buf[500];
+	int res;
+
+	if (*ppos > 0)
+		return 0;
+
+	res = scnprintf(buf, sizeof(buf),
+			"version:       %s\n"
+			"build date:    %s\n",
+			DRV_VERSION, DRV_RELDATE);
+
+	return simple_read_from_buffer(data, count, ppos, buf, res);
+}
+
+static const struct file_operations usnic_debugfs_buildinfo_ops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.read = usnic_debugfs_buildinfo_read
+};
+
+static ssize_t flowinfo_read(struct file *f, char __user *data,
+				size_t count, loff_t *ppos)
+{
+	struct usnic_ib_qp_grp_flow *qp_flow;
+	int n;
+	int left;
+	char *ptr;
+	char buf[512];
+
+	qp_flow = f->private_data;
+	ptr = buf;
+	left = count;
+
+	if (*ppos > 0)
+		return 0;
+
+	spin_lock(&qp_flow->qp_grp->lock);
+	n = scnprintf(ptr, left,
+			"QP Grp ID: %d Transport: %s ",
+			qp_flow->qp_grp->grp_id,
+			usnic_transport_to_str(qp_flow->trans_type));
+	UPDATE_PTR_LEFT(n, ptr, left);
+	if (qp_flow->trans_type == USNIC_TRANSPORT_ROCE_CUSTOM) {
+		n = scnprintf(ptr, left, "Port_Num:%hu\n",
+					qp_flow->usnic_roce.port_num);
+		UPDATE_PTR_LEFT(n, ptr, left);
+	} else if (qp_flow->trans_type == USNIC_TRANSPORT_IPV4_UDP) {
+		n = usnic_transport_sock_to_str(ptr, left,
+				qp_flow->udp.sock);
+		UPDATE_PTR_LEFT(n, ptr, left);
+		n = scnprintf(ptr, left, "\n");
+		UPDATE_PTR_LEFT(n, ptr, left);
+	}
+	spin_unlock(&qp_flow->qp_grp->lock);
+
+	return simple_read_from_buffer(data, count, ppos, buf, ptr - buf);
+}
+
+static const struct file_operations flowinfo_ops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.read = flowinfo_read,
+};
+
+void usnic_debugfs_init(void)
+{
+	debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
+	if (IS_ERR(debugfs_root)) {
+		usnic_err("Failed to create debugfs root dir, check if debugfs is enabled in kernel configuration\n");
+		goto out_clear_root;
+	}
+
+	flows_dentry = debugfs_create_dir("flows", debugfs_root);
+	if (IS_ERR_OR_NULL(flows_dentry)) {
+		usnic_err("Failed to create debugfs flow dir with err %ld\n",
+				PTR_ERR(flows_dentry));
+		goto out_free_root;
+	}
+
+	debugfs_create_file("build-info", S_IRUGO, debugfs_root,
+				NULL, &usnic_debugfs_buildinfo_ops);
+	return;
+
+out_free_root:
+	debugfs_remove_recursive(debugfs_root);
+out_clear_root:
+	debugfs_root = NULL;
+}
+
+void usnic_debugfs_exit(void)
+{
+	if (!debugfs_root)
+		return;
+
+	debugfs_remove_recursive(debugfs_root);
+	debugfs_root = NULL;
+}
+
+void usnic_debugfs_flow_add(struct usnic_ib_qp_grp_flow *qp_flow)
+{
+	if (IS_ERR_OR_NULL(flows_dentry))
+		return;
+
+	scnprintf(qp_flow->dentry_name, sizeof(qp_flow->dentry_name),
+			"%u", qp_flow->flow->flow_id);
+	qp_flow->dbgfs_dentry = debugfs_create_file(qp_flow->dentry_name,
+							S_IRUGO,
+							flows_dentry,
+							qp_flow,
+							&flowinfo_ops);
+	if (IS_ERR_OR_NULL(qp_flow->dbgfs_dentry)) {
+		usnic_err("Failed to create dbg fs entry for flow %u\n",
+				qp_flow->flow->flow_id);
+	}
+}
+
+void usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow *qp_flow)
+{
+	if (!IS_ERR_OR_NULL(qp_flow->dbgfs_dentry))
+		debugfs_remove(qp_flow->dbgfs_dentry);
+}