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
43 static struct dentry *debugfs_root;
44 static struct dentry *flows_dentry;
45
usnic_debugfs_buildinfo_read(struct file * f,char __user * data,size_t count,loff_t * ppos)46 static 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
63 static const struct file_operations usnic_debugfs_buildinfo_ops = {
64 .owner = THIS_MODULE,
65 .open = simple_open,
66 .read = usnic_debugfs_buildinfo_read
67 };
68
flowinfo_read(struct file * f,char __user * data,size_t count,loff_t * ppos)69 static 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
107 static const struct file_operations flowinfo_ops = {
108 .owner = THIS_MODULE,
109 .open = simple_open,
110 .read = flowinfo_read,
111 };
112
usnic_debugfs_init(void)113 void 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
usnic_debugfs_exit(void)123 void usnic_debugfs_exit(void)
124 {
125 debugfs_remove_recursive(debugfs_root);
126 debugfs_root = NULL;
127 }
128
usnic_debugfs_flow_add(struct usnic_ib_qp_grp_flow * qp_flow)129 void 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
usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow * qp_flow)140 void usnic_debugfs_flow_remove(struct usnic_ib_qp_grp_flow *qp_flow)
141 {
142 debugfs_remove(qp_flow->dbgfs_dentry);
143 }
144