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
36#include "usnic.h"
37#include "usnic_log.h"
38#include "usnic_debugfs.h"
39#include "usnic_ib_qp_grp.h"
40#include "usnic_transport.h"
41
42static struct dentry *debugfs_root;
43static struct dentry *flows_dentry;
44
45static ssize_t usnic_debugfs_buildinfo_read(struct file *f, char __user *data,
46 size_t count, loff_t *ppos)
47{
48 char buf[500];
49 int res;
50
51 if (*ppos > 0)
52 return 0;
53
54 res = scnprintf(buf, size: sizeof(buf),
55 fmt: "version: %s\n"
56 "build date: %s\n",
57 DRV_VERSION, DRV_RELDATE);
58
59 return simple_read_from_buffer(to: data, count, ppos, from: buf, available: res);
60}
61
62static const struct file_operations usnic_debugfs_buildinfo_ops = {
63 .owner = THIS_MODULE,
64 .open = simple_open,
65 .read = usnic_debugfs_buildinfo_read
66};
67
68static ssize_t flowinfo_read(struct file *f, char __user *data,
69 size_t count, loff_t *ppos)
70{
71 struct usnic_ib_qp_grp_flow *qp_flow;
72 int n;
73 int left;
74 char *ptr;
75 char buf[512];
76
77 qp_flow = f->private_data;
78 ptr = buf;
79 left = count;
80
81 if (*ppos > 0)
82 return 0;
83
84 spin_lock(lock: &qp_flow->qp_grp->lock);
85 n = scnprintf(buf: ptr, size: left,
86 fmt: "QP Grp ID: %d Transport: %s ",
87 qp_flow->qp_grp->grp_id,
88 usnic_transport_to_str(trans_type: qp_flow->trans_type));
89 UPDATE_PTR_LEFT(n, ptr, left);
90 if (qp_flow->trans_type == USNIC_TRANSPORT_ROCE_CUSTOM) {
91 n = scnprintf(buf: ptr, size: left, fmt: "Port_Num:%hu\n",
92 qp_flow->usnic_roce.port_num);
93 UPDATE_PTR_LEFT(n, ptr, left);
94 } else if (qp_flow->trans_type == USNIC_TRANSPORT_IPV4_UDP) {
95 n = usnic_transport_sock_to_str(buf: ptr, buf_sz: left,
96 sock: qp_flow->udp.sock);
97 UPDATE_PTR_LEFT(n, ptr, left);
98 n = scnprintf(buf: ptr, size: left, fmt: "\n");
99 UPDATE_PTR_LEFT(n, ptr, left);
100 }
101 spin_unlock(lock: &qp_flow->qp_grp->lock);
102
103 return simple_read_from_buffer(to: data, count, ppos, from: buf, available: ptr - buf);
104}
105
106static const struct file_operations flowinfo_ops = {
107 .owner = THIS_MODULE,
108 .open = simple_open,
109 .read = flowinfo_read,
110};
111
112void usnic_debugfs_init(void)
113{
114 debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
115
116 flows_dentry = debugfs_create_dir(name: "flows", parent: debugfs_root);
117
118 debugfs_create_file("build-info", S_IRUGO, debugfs_root,
119 NULL, &usnic_debugfs_buildinfo_ops);
120}
121
122void usnic_debugfs_exit(void)
123{
124 debugfs_remove_recursive(dentry: debugfs_root);
125 debugfs_root = NULL;
126}
127
128void usnic_debugfs_flow_add(struct usnic_ib_qp_grp_flow *qp_flow)
129{
130 scnprintf(buf: qp_flow->dentry_name, size: sizeof(qp_flow->dentry_name),
131 fmt: "%u", qp_flow->flow->flow_id);
132 qp_flow->dbgfs_dentry = debugfs_create_file(qp_flow->dentry_name,
133 S_IRUGO,
134 flows_dentry,
135 qp_flow,
136 &flowinfo_ops);
137}
138
139void usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow *qp_flow)
140{
141 debugfs_remove(dentry: qp_flow->dbgfs_dentry);
142}
143

source code of linux/drivers/infiniband/hw/usnic/usnic_debugfs.c