summaryrefslogtreecommitdiff
path: root/drivers/infiniband/hw/usnic/usnic_debugfs.c
blob: 5d13860161a4a64af533b3a5aee3c43e25e475d0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
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);
}