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7#include <linux/slab.h>
8#include <linux/kernel.h>
9#include <linux/device.h>
10#include <linux/debugfs.h>
11#include <linux/seq_file.h>
12
13#include <linux/mei.h>
14
15#include "mei_dev.h"
16#include "client.h"
17#include "hw.h"
18
19static int mei_dbgfs_meclients_show(struct seq_file *m, void *unused)
20{
21 struct mei_device *dev = m->private;
22 struct mei_me_client *me_cl;
23 int i = 0;
24
25 if (!dev)
26 return -ENODEV;
27
28 down_read(&dev->me_clients_rwsem);
29
30 seq_puts(m, " |id|fix| UUID |con|msg len|sb|refc|vt|\n");
31
32
33 if (dev->dev_state != MEI_DEV_ENABLED)
34 goto out;
35
36 list_for_each_entry(me_cl, &dev->me_clients, list) {
37 if (!mei_me_cl_get(me_cl))
38 continue;
39
40 seq_printf(m, "%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|%2d|\n",
41 i++, me_cl->client_id,
42 me_cl->props.fixed_address,
43 &me_cl->props.protocol_name,
44 me_cl->props.max_number_of_connections,
45 me_cl->props.max_msg_length,
46 me_cl->props.single_recv_buf,
47 kref_read(&me_cl->refcnt),
48 me_cl->props.vt_supported);
49 mei_me_cl_put(me_cl);
50 }
51
52out:
53 up_read(&dev->me_clients_rwsem);
54 return 0;
55}
56DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_meclients);
57
58static int mei_dbgfs_active_show(struct seq_file *m, void *unused)
59{
60 struct mei_device *dev = m->private;
61 struct mei_cl *cl;
62 int i = 0;
63
64 if (!dev)
65 return -ENODEV;
66
67 mutex_lock(&dev->device_lock);
68
69 seq_puts(m, " |me|host|state|rd|wr|wrq\n");
70
71
72 if (dev->dev_state != MEI_DEV_ENABLED)
73 goto out;
74
75 list_for_each_entry(cl, &dev->file_list, link) {
76
77 seq_printf(m, "%3d|%2d|%4d|%5d|%2d|%2d|%3u\n",
78 i, mei_cl_me_id(cl), cl->host_client_id, cl->state,
79 !list_empty(&cl->rd_completed), cl->writing_state,
80 cl->tx_cb_queued);
81 i++;
82 }
83out:
84 mutex_unlock(&dev->device_lock);
85 return 0;
86}
87DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_active);
88
89static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused)
90{
91 struct mei_device *dev = m->private;
92
93 seq_printf(m, "dev: %s\n", mei_dev_state_str(dev->dev_state));
94 seq_printf(m, "hbm: %s\n", mei_hbm_state_str(dev->hbm_state));
95
96 if (dev->hbm_state >= MEI_HBM_ENUM_CLIENTS &&
97 dev->hbm_state <= MEI_HBM_STARTED) {
98 seq_puts(m, "hbm features:\n");
99 seq_printf(m, "\tPG: %01d\n", dev->hbm_f_pg_supported);
100 seq_printf(m, "\tDC: %01d\n", dev->hbm_f_dc_supported);
101 seq_printf(m, "\tIE: %01d\n", dev->hbm_f_ie_supported);
102 seq_printf(m, "\tDOT: %01d\n", dev->hbm_f_dot_supported);
103 seq_printf(m, "\tEV: %01d\n", dev->hbm_f_ev_supported);
104 seq_printf(m, "\tFA: %01d\n", dev->hbm_f_fa_supported);
105 seq_printf(m, "\tOS: %01d\n", dev->hbm_f_os_supported);
106 seq_printf(m, "\tDR: %01d\n", dev->hbm_f_dr_supported);
107 seq_printf(m, "\tVT: %01d\n", dev->hbm_f_vt_supported);
108 seq_printf(m, "\tCAP: %01d\n", dev->hbm_f_cap_supported);
109 }
110
111 seq_printf(m, "pg: %s, %s\n",
112 mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED",
113 mei_pg_state_str(mei_pg_state(dev)));
114 return 0;
115}
116DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_devstate);
117
118static ssize_t mei_dbgfs_write_allow_fa(struct file *file,
119 const char __user *user_buf,
120 size_t count, loff_t *ppos)
121{
122 struct mei_device *dev;
123 int ret;
124
125 dev = container_of(file->private_data,
126 struct mei_device, allow_fixed_address);
127
128 ret = debugfs_write_file_bool(file, user_buf, count, ppos);
129 if (ret < 0)
130 return ret;
131 dev->override_fixed_address = true;
132 return ret;
133}
134
135static const struct file_operations mei_dbgfs_allow_fa_fops = {
136 .open = simple_open,
137 .read = debugfs_read_file_bool,
138 .write = mei_dbgfs_write_allow_fa,
139 .llseek = generic_file_llseek,
140};
141
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144
145
146
147void mei_dbgfs_deregister(struct mei_device *dev)
148{
149 if (!dev->dbgfs_dir)
150 return;
151 debugfs_remove_recursive(dev->dbgfs_dir);
152 dev->dbgfs_dir = NULL;
153}
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159
160
161void mei_dbgfs_register(struct mei_device *dev, const char *name)
162{
163 struct dentry *dir;
164
165 dir = debugfs_create_dir(name, NULL);
166 dev->dbgfs_dir = dir;
167
168 debugfs_create_file("meclients", S_IRUSR, dir, dev,
169 &mei_dbgfs_meclients_fops);
170 debugfs_create_file("active", S_IRUSR, dir, dev,
171 &mei_dbgfs_active_fops);
172 debugfs_create_file("devstate", S_IRUSR, dir, dev,
173 &mei_dbgfs_devstate_fops);
174 debugfs_create_file("allow_fixed_address", S_IRUSR | S_IWUSR, dir,
175 &dev->allow_fixed_address,
176 &mei_dbgfs_allow_fa_fops);
177}
178
