1/*
2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses.  You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * BSD license below:
9 *
10 *     Redistribution and use in source and binary forms, with or
11 *     without modification, are permitted provided that the following
12 *     conditions are met:
13 *
14 *      - Redistributions of source code must retain the above
15 *        copyright notice, this list of conditions and the following
16 *        disclaimer.
17 *
18 *      - Redistributions in binary form must reproduce the above
19 *        copyright notice, this list of conditions and the following
20 *        disclaimer in the documentation and/or other materials
21 *        provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34#include <linux/debugfs.h>
35#include <linux/module.h>
36
37#include "usnic.h"
38#include "usnic_log.h"
39#include "usnic_debugfs.h"
40#include "usnic_ib_qp_grp.h"
41#include "usnic_transport.h"
42
43static struct dentry *debugfs_root;
44static struct dentry *flows_dentry;
45
46static ssize_t usnic_debugfs_buildinfo_read(struct file *f, char __user *data,
47						size_t count, loff_t *ppos)
48{
49	char buf[500];
50	int res;
51
52	if (*ppos > 0)
53		return 0;
54
55	res = scnprintf(buf, sizeof(buf),
56			"version:       %s\n"
57			"build date:    %s\n",
58			DRV_VERSION, DRV_RELDATE);
59
60	return simple_read_from_buffer(data, count, ppos, buf, res);
61}
62
63static const struct file_operations usnic_debugfs_buildinfo_ops = {
64	.owner = THIS_MODULE,
65	.open = simple_open,
66	.read = usnic_debugfs_buildinfo_read
67};
68
69static ssize_t flowinfo_read(struct file *f, char __user *data,
70				size_t count, loff_t *ppos)
71{
72	struct usnic_ib_qp_grp_flow *qp_flow;
73	int n;
74	int left;
75	char *ptr;
76	char buf[512];
77
78	qp_flow = f->private_data;
79	ptr = buf;
80	left = count;
81
82	if (*ppos > 0)
83		return 0;
84
85	spin_lock(&qp_flow->qp_grp->lock);
86	n = scnprintf(ptr, left,
87			"QP Grp ID: %d Transport: %s ",
88			qp_flow->qp_grp->grp_id,
89			usnic_transport_to_str(qp_flow->trans_type));
90	UPDATE_PTR_LEFT(n, ptr, left);
91	if (qp_flow->trans_type == USNIC_TRANSPORT_ROCE_CUSTOM) {
92		n = scnprintf(ptr, left, "Port_Num:%hu\n",
93					qp_flow->usnic_roce.port_num);
94		UPDATE_PTR_LEFT(n, ptr, left);
95	} else if (qp_flow->trans_type == USNIC_TRANSPORT_IPV4_UDP) {
96		n = usnic_transport_sock_to_str(ptr, left,
97				qp_flow->udp.sock);
98		UPDATE_PTR_LEFT(n, ptr, left);
99		n = scnprintf(ptr, left, "\n");
100		UPDATE_PTR_LEFT(n, ptr, left);
101	}
102	spin_unlock(&qp_flow->qp_grp->lock);
103
104	return simple_read_from_buffer(data, count, ppos, buf, ptr - buf);
105}
106
107static const struct file_operations flowinfo_ops = {
108	.owner = THIS_MODULE,
109	.open = simple_open,
110	.read = flowinfo_read,
111};
112
113void usnic_debugfs_init(void)
114{
115	debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
116
117	flows_dentry = debugfs_create_dir("flows", debugfs_root);
118
119	debugfs_create_file("build-info", S_IRUGO, debugfs_root,
120				NULL, &usnic_debugfs_buildinfo_ops);
121}
122
123void usnic_debugfs_exit(void)
124{
125	debugfs_remove_recursive(debugfs_root);
126	debugfs_root = NULL;
127}
128
129void usnic_debugfs_flow_add(struct usnic_ib_qp_grp_flow *qp_flow)
130{
131	scnprintf(qp_flow->dentry_name, sizeof(qp_flow->dentry_name),
132			"%u", qp_flow->flow->flow_id);
133	qp_flow->dbgfs_dentry = debugfs_create_file(qp_flow->dentry_name,
134							S_IRUGO,
135							flows_dentry,
136							qp_flow,
137							&flowinfo_ops);
138}
139
140void usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow *qp_flow)
141{
142	debugfs_remove(qp_flow->dbgfs_dentry);
143}
144