summaryrefslogtreecommitdiff
path: root/drivers/misc/mei/debugfs.c
blob: 3ab1a431d8102d9c1be85d7732968489d6c4a675 (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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2012-2016, Intel Corporation. All rights reserved
 * Intel Management Engine Interface (Intel MEI) Linux driver
 */

#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>

#include <linux/mei.h>

#include "mei_dev.h"
#include "client.h"
#include "hw.h"

static int mei_dbgfs_meclients_show(struct seq_file *m, void *unused)
{
	struct mei_device *dev = m->private;
	struct mei_me_client *me_cl;
	int i = 0;

	if (!dev)
		return -ENODEV;

	down_read(&dev->me_clients_rwsem);

	seq_puts(m, "  |id|fix|         UUID                       |con|msg len|sb|refc|vt|\n");

	/*  if the driver is not enabled the list won't be consistent */
	if (dev->dev_state != MEI_DEV_ENABLED)
		goto out;

	list_for_each_entry(me_cl, &dev->me_clients, list) {
		if (!mei_me_cl_get(me_cl))
			continue;

		seq_printf(m, "%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|%2d|\n",
			   i++, me_cl->client_id,
			   me_cl->props.fixed_address,
			   &me_cl->props.protocol_name,
			   me_cl->props.max_number_of_connections,
			   me_cl->props.max_msg_length,
			   me_cl->props.single_recv_buf,
			   kref_read(&me_cl->refcnt),
			   me_cl->props.vt_supported);
		mei_me_cl_put(me_cl);
	}

out:
	up_read(&dev->me_clients_rwsem);
	return 0;
}
DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_meclients);

static int mei_dbgfs_active_show(struct seq_file *m, void *unused)
{
	struct mei_device *dev = m->private;
	struct mei_cl *cl;
	int i = 0;

	if (!dev)
		return -ENODEV;

	mutex_lock(&dev->device_lock);

	seq_puts(m, "   |me|host|state|rd|wr|wrq\n");

	/*  if the driver is not enabled the list won't be consistent */
	if (dev->dev_state != MEI_DEV_ENABLED)
		goto out;

	list_for_each_entry(cl, &dev->file_list, link) {

		seq_printf(m, "%3d|%2d|%4d|%5d|%2d|%2d|%3u\n",
			   i, mei_cl_me_id(cl), cl->host_client_id, cl->state,
			   !list_empty(&cl->rd_completed), cl->writing_state,
			   cl->tx_cb_queued);
		i++;
	}
out:
	mutex_unlock(&dev->device_lock);
	return 0;
}
DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_active);

static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused)
{
	struct mei_device *dev = m->private;

	seq_printf(m, "dev: %s\n", mei_dev_state_str(dev->dev_state));
	seq_printf(m, "hbm: %s\n", mei_hbm_state_str(dev->hbm_state));

	if (dev->hbm_state >= MEI_HBM_ENUM_CLIENTS &&
	    dev->hbm_state <= MEI_HBM_STARTED) {
		seq_puts(m, "hbm features:\n");
		seq_printf(m, "\tPG: %01d\n", dev->hbm_f_pg_supported);
		seq_printf(m, "\tDC: %01d\n", dev->hbm_f_dc_supported);
		seq_printf(m, "\tIE: %01d\n", dev->hbm_f_ie_supported);
		seq_printf(m, "\tDOT: %01d\n", dev->hbm_f_dot_supported);
		seq_printf(m, "\tEV: %01d\n", dev->hbm_f_ev_supported);
		seq_printf(m, "\tFA: %01d\n", dev->hbm_f_fa_supported);
		seq_printf(m, "\tOS: %01d\n", dev->hbm_f_os_supported);
		seq_printf(m, "\tDR: %01d\n", dev->hbm_f_dr_supported);
		seq_printf(m, "\tVT: %01d\n", dev->hbm_f_vt_supported);
		seq_printf(m, "\tCAP: %01d\n", dev->hbm_f_cap_supported);
	}

	seq_printf(m, "pg:  %s, %s\n",
		   mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED",
		   mei_pg_state_str(mei_pg_state(dev)));
	return 0;
}
DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_devstate);

static ssize_t mei_dbgfs_write_allow_fa(struct file *file,
					const char __user *user_buf,
					size_t count, loff_t *ppos)
{
	struct mei_device *dev;
	int ret;

	dev = container_of(file->private_data,
			   struct mei_device, allow_fixed_address);

	ret = debugfs_write_file_bool(file, user_buf, count, ppos);
	if (ret < 0)
		return ret;
	dev->override_fixed_address = true;
	return ret;
}

static const struct file_operations mei_dbgfs_allow_fa_fops = {
	.open = simple_open,
	.read = debugfs_read_file_bool,
	.write = mei_dbgfs_write_allow_fa,
	.llseek = generic_file_llseek,
};

/**
 * mei_dbgfs_deregister - Remove the debugfs files and directories
 *
 * @dev: the mei device structure
 */
void mei_dbgfs_deregister(struct mei_device *dev)
{
	if (!dev->dbgfs_dir)
		return;
	debugfs_remove_recursive(dev->dbgfs_dir);
	dev->dbgfs_dir = NULL;
}

/**
 * mei_dbgfs_register - Add the debugfs files
 *
 * @dev: the mei device structure
 * @name: the mei device name
 */
void mei_dbgfs_register(struct mei_device *dev, const char *name)
{
	struct dentry *dir;

	dir = debugfs_create_dir(name, NULL);
	dev->dbgfs_dir = dir;

	debugfs_create_file("meclients", S_IRUSR, dir, dev,
			    &mei_dbgfs_meclients_fops);
	debugfs_create_file("active", S_IRUSR, dir, dev,
			    &mei_dbgfs_active_fops);
	debugfs_create_file("devstate", S_IRUSR, dir, dev,
			    &mei_dbgfs_devstate_fops);
	debugfs_create_file("allow_fixed_address", S_IRUSR | S_IWUSR, dir,
			    &dev->allow_fixed_address,
			    &mei_dbgfs_allow_fa_fops);
}