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path: root/drivers/infiniband/hw/usnic/usnic_debugfs.c
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Diffstat (limited to 'drivers/infiniband/hw/usnic/usnic_debugfs.c')
-rw-r--r--drivers/infiniband/hw/usnic/usnic_debugfs.c154
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 00000000000..5d13860161a
--- /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);
+}