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27#include <linux/spinlock.h>
28#include <linux/module.h>
29#include <linux/slab.h>
30#include <linux/notifier.h>
31#include <linux/device.h>
32#include <linux/debugfs.h>
33#include <linux/uaccess.h>
34#include <linux/seq_file.h>
35
36#include <linux/uwb/debug-cmd.h>
37
38#include "uwb-internal.h"
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55struct uwb_dbg {
56 struct uwb_pal pal;
57
58 bool accept;
59 struct list_head rsvs;
60
61 struct dentry *root_d;
62 struct dentry *command_f;
63 struct dentry *reservations_f;
64 struct dentry *accept_f;
65 struct dentry *drp_avail_f;
66 spinlock_t list_lock;
67};
68
69static struct dentry *root_dir;
70
71static void uwb_dbg_rsv_cb(struct uwb_rsv *rsv)
72{
73 struct uwb_dbg *dbg = rsv->pal_priv;
74
75 uwb_rsv_dump("debug", rsv);
76
77 if (rsv->state == UWB_RSV_STATE_NONE) {
78 spin_lock(&dbg->list_lock);
79 list_del(&rsv->pal_node);
80 spin_unlock(&dbg->list_lock);
81 uwb_rsv_destroy(rsv);
82 }
83}
84
85static int cmd_rsv_establish(struct uwb_rc *rc,
86 struct uwb_dbg_cmd_rsv_establish *cmd)
87{
88 struct uwb_mac_addr macaddr;
89 struct uwb_rsv *rsv;
90 struct uwb_dev *target;
91 int ret;
92
93 memcpy(&macaddr, cmd->target, sizeof(macaddr));
94 target = uwb_dev_get_by_macaddr(rc, &macaddr);
95 if (target == NULL)
96 return -ENODEV;
97
98 rsv = uwb_rsv_create(rc, uwb_dbg_rsv_cb, rc->dbg);
99 if (rsv == NULL) {
100 uwb_dev_put(target);
101 return -ENOMEM;
102 }
103
104 rsv->target.type = UWB_RSV_TARGET_DEV;
105 rsv->target.dev = target;
106 rsv->type = cmd->type;
107 rsv->max_mas = cmd->max_mas;
108 rsv->min_mas = cmd->min_mas;
109 rsv->max_interval = cmd->max_interval;
110
111 ret = uwb_rsv_establish(rsv);
112 if (ret)
113 uwb_rsv_destroy(rsv);
114 else {
115 spin_lock(&(rc->dbg)->list_lock);
116 list_add_tail(&rsv->pal_node, &rc->dbg->rsvs);
117 spin_unlock(&(rc->dbg)->list_lock);
118 }
119 return ret;
120}
121
122static int cmd_rsv_terminate(struct uwb_rc *rc,
123 struct uwb_dbg_cmd_rsv_terminate *cmd)
124{
125 struct uwb_rsv *rsv, *found = NULL;
126 int i = 0;
127
128 spin_lock(&(rc->dbg)->list_lock);
129
130 list_for_each_entry(rsv, &rc->dbg->rsvs, pal_node) {
131 if (i == cmd->index) {
132 found = rsv;
133 uwb_rsv_get(found);
134 break;
135 }
136 i++;
137 }
138
139 spin_unlock(&(rc->dbg)->list_lock);
140
141 if (!found)
142 return -EINVAL;
143
144 uwb_rsv_terminate(found);
145 uwb_rsv_put(found);
146
147 return 0;
148}
149
150static int cmd_ie_add(struct uwb_rc *rc, struct uwb_dbg_cmd_ie *ie_to_add)
151{
152 return uwb_rc_ie_add(rc,
153 (const struct uwb_ie_hdr *) ie_to_add->data,
154 ie_to_add->len);
155}
156
157static int cmd_ie_rm(struct uwb_rc *rc, struct uwb_dbg_cmd_ie *ie_to_rm)
158{
159 return uwb_rc_ie_rm(rc, ie_to_rm->data[0]);
160}
161
162static ssize_t command_write(struct file *file, const char __user *buf,
163 size_t len, loff_t *off)
164{
165 struct uwb_rc *rc = file->private_data;
166 struct uwb_dbg_cmd cmd;
167 int ret = 0;
168
169 if (len != sizeof(struct uwb_dbg_cmd))
170 return -EINVAL;
171
172 if (copy_from_user(&cmd, buf, len) != 0)
173 return -EFAULT;
174
175 switch (cmd.type) {
176 case UWB_DBG_CMD_RSV_ESTABLISH:
177 ret = cmd_rsv_establish(rc, &cmd.rsv_establish);
178 break;
179 case UWB_DBG_CMD_RSV_TERMINATE:
180 ret = cmd_rsv_terminate(rc, &cmd.rsv_terminate);
181 break;
182 case UWB_DBG_CMD_IE_ADD:
183 ret = cmd_ie_add(rc, &cmd.ie_add);
184 break;
185 case UWB_DBG_CMD_IE_RM:
186 ret = cmd_ie_rm(rc, &cmd.ie_rm);
187 break;
188 case UWB_DBG_CMD_RADIO_START:
189 ret = uwb_radio_start(&rc->dbg->pal);
190 break;
191 case UWB_DBG_CMD_RADIO_STOP:
192 uwb_radio_stop(&rc->dbg->pal);
193 break;
194 default:
195 return -EINVAL;
196 }
197
198 return ret < 0 ? ret : len;
199}
200
201static const struct file_operations command_fops = {
202 .open = simple_open,
203 .write = command_write,
204 .read = NULL,
205 .llseek = no_llseek,
206 .owner = THIS_MODULE,
207};
208
209static int reservations_print(struct seq_file *s, void *p)
210{
211 struct uwb_rc *rc = s->private;
212 struct uwb_rsv *rsv;
213
214 mutex_lock(&rc->rsvs_mutex);
215
216 list_for_each_entry(rsv, &rc->reservations, rc_node) {
217 struct uwb_dev_addr devaddr;
218 char owner[UWB_ADDR_STRSIZE], target[UWB_ADDR_STRSIZE];
219 bool is_owner;
220
221 uwb_dev_addr_print(owner, sizeof(owner), &rsv->owner->dev_addr);
222 if (rsv->target.type == UWB_RSV_TARGET_DEV) {
223 devaddr = rsv->target.dev->dev_addr;
224 is_owner = &rc->uwb_dev == rsv->owner;
225 } else {
226 devaddr = rsv->target.devaddr;
227 is_owner = true;
228 }
229 uwb_dev_addr_print(target, sizeof(target), &devaddr);
230
231 seq_printf(s, "%c %s -> %s: %s\n",
232 is_owner ? 'O' : 'T',
233 owner, target, uwb_rsv_state_str(rsv->state));
234 seq_printf(s, " stream: %d type: %s\n",
235 rsv->stream, uwb_rsv_type_str(rsv->type));
236 seq_printf(s, " %*pb\n", UWB_NUM_MAS, rsv->mas.bm);
237 }
238
239 mutex_unlock(&rc->rsvs_mutex);
240
241 return 0;
242}
243
244static int reservations_open(struct inode *inode, struct file *file)
245{
246 return single_open(file, reservations_print, inode->i_private);
247}
248
249static const struct file_operations reservations_fops = {
250 .open = reservations_open,
251 .read = seq_read,
252 .llseek = seq_lseek,
253 .release = single_release,
254 .owner = THIS_MODULE,
255};
256
257static int drp_avail_print(struct seq_file *s, void *p)
258{
259 struct uwb_rc *rc = s->private;
260
261 seq_printf(s, "global: %*pb\n", UWB_NUM_MAS, rc->drp_avail.global);
262 seq_printf(s, "local: %*pb\n", UWB_NUM_MAS, rc->drp_avail.local);
263 seq_printf(s, "pending: %*pb\n", UWB_NUM_MAS, rc->drp_avail.pending);
264
265 return 0;
266}
267
268static int drp_avail_open(struct inode *inode, struct file *file)
269{
270 return single_open(file, drp_avail_print, inode->i_private);
271}
272
273static const struct file_operations drp_avail_fops = {
274 .open = drp_avail_open,
275 .read = seq_read,
276 .llseek = seq_lseek,
277 .release = single_release,
278 .owner = THIS_MODULE,
279};
280
281static void uwb_dbg_channel_changed(struct uwb_pal *pal, int channel)
282{
283 struct device *dev = &pal->rc->uwb_dev.dev;
284
285 if (channel > 0)
286 dev_info(dev, "debug: channel %d started\n", channel);
287 else
288 dev_info(dev, "debug: channel stopped\n");
289}
290
291static void uwb_dbg_new_rsv(struct uwb_pal *pal, struct uwb_rsv *rsv)
292{
293 struct uwb_dbg *dbg = container_of(pal, struct uwb_dbg, pal);
294
295 if (dbg->accept) {
296 spin_lock(&dbg->list_lock);
297 list_add_tail(&rsv->pal_node, &dbg->rsvs);
298 spin_unlock(&dbg->list_lock);
299 uwb_rsv_accept(rsv, uwb_dbg_rsv_cb, dbg);
300 }
301}
302
303
304
305
306
307void uwb_dbg_add_rc(struct uwb_rc *rc)
308{
309 rc->dbg = kzalloc(sizeof(struct uwb_dbg), GFP_KERNEL);
310 if (rc->dbg == NULL)
311 return;
312
313 INIT_LIST_HEAD(&rc->dbg->rsvs);
314 spin_lock_init(&(rc->dbg)->list_lock);
315
316 uwb_pal_init(&rc->dbg->pal);
317 rc->dbg->pal.rc = rc;
318 rc->dbg->pal.channel_changed = uwb_dbg_channel_changed;
319 rc->dbg->pal.new_rsv = uwb_dbg_new_rsv;
320 uwb_pal_register(&rc->dbg->pal);
321
322 if (root_dir) {
323 rc->dbg->root_d = debugfs_create_dir(dev_name(&rc->uwb_dev.dev),
324 root_dir);
325 rc->dbg->command_f = debugfs_create_file("command", 0200,
326 rc->dbg->root_d, rc,
327 &command_fops);
328 rc->dbg->reservations_f = debugfs_create_file("reservations", 0444,
329 rc->dbg->root_d, rc,
330 &reservations_fops);
331 rc->dbg->accept_f = debugfs_create_bool("accept", 0644,
332 rc->dbg->root_d,
333 &rc->dbg->accept);
334 rc->dbg->drp_avail_f = debugfs_create_file("drp_avail", 0444,
335 rc->dbg->root_d, rc,
336 &drp_avail_fops);
337 }
338}
339
340
341
342
343
344void uwb_dbg_del_rc(struct uwb_rc *rc)
345{
346 struct uwb_rsv *rsv, *t;
347
348 if (rc->dbg == NULL)
349 return;
350
351 list_for_each_entry_safe(rsv, t, &rc->dbg->rsvs, pal_node) {
352 uwb_rsv_terminate(rsv);
353 }
354
355 uwb_pal_unregister(&rc->dbg->pal);
356
357 if (root_dir) {
358 debugfs_remove(rc->dbg->drp_avail_f);
359 debugfs_remove(rc->dbg->accept_f);
360 debugfs_remove(rc->dbg->reservations_f);
361 debugfs_remove(rc->dbg->command_f);
362 debugfs_remove(rc->dbg->root_d);
363 }
364}
365
366
367
368
369void uwb_dbg_init(void)
370{
371 root_dir = debugfs_create_dir("uwb", NULL);
372}
373
374
375
376
377void uwb_dbg_exit(void)
378{
379 debugfs_remove(root_dir);
380}
381
382
383
384
385
386struct dentry *uwb_dbg_create_pal_dir(struct uwb_pal *pal)
387{
388 struct uwb_rc *rc = pal->rc;
389
390 if (root_dir && rc->dbg && rc->dbg->root_d && pal->name)
391 return debugfs_create_dir(pal->name, rc->dbg->root_d);
392 return NULL;
393}
394
