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599e8d80 DV |
1 | /* |
2 | * Ultra Wide Band | |
3 | * Debug support | |
4 | * | |
5 | * Copyright (C) 2005-2006 Intel Corporation | |
6 | * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License version | |
10 | * 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
20 | * 02110-1301, USA. | |
21 | * | |
22 | * | |
23 | * FIXME: doc | |
24 | */ | |
25 | ||
26 | #include <linux/spinlock.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/notifier.h> | |
30 | #include <linux/device.h> | |
31 | #include <linux/debugfs.h> | |
32 | #include <linux/uaccess.h> | |
33 | #include <linux/seq_file.h> | |
34 | ||
35 | #include <linux/uwb/debug-cmd.h> | |
36 | #define D_LOCAL 0 | |
37 | #include <linux/uwb/debug.h> | |
38 | ||
39 | #include "uwb-internal.h" | |
40 | ||
41 | void dump_bytes(struct device *dev, const void *_buf, size_t rsize) | |
42 | { | |
43 | const char *buf = _buf; | |
44 | char line[32]; | |
45 | size_t offset = 0; | |
46 | int cnt, cnt2; | |
47 | for (cnt = 0; cnt < rsize; cnt += 8) { | |
48 | size_t rtop = rsize - cnt < 8 ? rsize - cnt : 8; | |
49 | for (offset = cnt2 = 0; cnt2 < rtop; cnt2++) { | |
50 | offset += scnprintf(line + offset, sizeof(line) - offset, | |
51 | "%02x ", buf[cnt + cnt2] & 0xff); | |
52 | } | |
53 | if (dev) | |
54 | dev_info(dev, "%s\n", line); | |
55 | else | |
56 | printk(KERN_INFO "%s\n", line); | |
57 | } | |
58 | } | |
59 | EXPORT_SYMBOL_GPL(dump_bytes); | |
60 | ||
61 | /* | |
62 | * Debug interface | |
63 | * | |
64 | * Per radio controller debugfs files (in uwb/uwbN/): | |
65 | * | |
66 | * command: Flexible command interface (see <linux/uwb/debug-cmd.h>). | |
67 | * | |
68 | * reservations: information on reservations. | |
69 | * | |
70 | * accept: Set to true (Y or 1) to accept reservation requests from | |
71 | * peers. | |
72 | * | |
73 | * drp_avail: DRP availability information. | |
74 | */ | |
75 | ||
76 | struct uwb_dbg { | |
77 | struct uwb_pal pal; | |
78 | ||
79 | u32 accept; | |
80 | struct list_head rsvs; | |
81 | ||
82 | struct dentry *root_d; | |
83 | struct dentry *command_f; | |
84 | struct dentry *reservations_f; | |
85 | struct dentry *accept_f; | |
86 | struct dentry *drp_avail_f; | |
87 | }; | |
88 | ||
89 | static struct dentry *root_dir; | |
90 | ||
91 | static void uwb_dbg_rsv_cb(struct uwb_rsv *rsv) | |
92 | { | |
93 | struct uwb_rc *rc = rsv->rc; | |
94 | struct device *dev = &rc->uwb_dev.dev; | |
95 | struct uwb_dev_addr devaddr; | |
96 | char owner[UWB_ADDR_STRSIZE], target[UWB_ADDR_STRSIZE]; | |
97 | ||
98 | uwb_dev_addr_print(owner, sizeof(owner), &rsv->owner->dev_addr); | |
99 | if (rsv->target.type == UWB_RSV_TARGET_DEV) | |
100 | devaddr = rsv->target.dev->dev_addr; | |
101 | else | |
102 | devaddr = rsv->target.devaddr; | |
103 | uwb_dev_addr_print(target, sizeof(target), &devaddr); | |
104 | ||
105 | dev_dbg(dev, "debug: rsv %s -> %s: %s\n", | |
106 | owner, target, uwb_rsv_state_str(rsv->state)); | |
107 | } | |
108 | ||
109 | static int cmd_rsv_establish(struct uwb_rc *rc, | |
110 | struct uwb_dbg_cmd_rsv_establish *cmd) | |
111 | { | |
112 | struct uwb_mac_addr macaddr; | |
113 | struct uwb_rsv *rsv; | |
114 | struct uwb_dev *target; | |
115 | int ret; | |
116 | ||
117 | memcpy(&macaddr, cmd->target, sizeof(macaddr)); | |
118 | target = uwb_dev_get_by_macaddr(rc, &macaddr); | |
119 | if (target == NULL) | |
120 | return -ENODEV; | |
121 | ||
122 | rsv = uwb_rsv_create(rc, uwb_dbg_rsv_cb, NULL); | |
123 | if (rsv == NULL) { | |
124 | uwb_dev_put(target); | |
125 | return -ENOMEM; | |
126 | } | |
127 | ||
128 | rsv->owner = &rc->uwb_dev; | |
129 | rsv->target.type = UWB_RSV_TARGET_DEV; | |
130 | rsv->target.dev = target; | |
131 | rsv->type = cmd->type; | |
132 | rsv->max_mas = cmd->max_mas; | |
133 | rsv->min_mas = cmd->min_mas; | |
134 | rsv->sparsity = cmd->sparsity; | |
135 | ||
136 | ret = uwb_rsv_establish(rsv); | |
137 | if (ret) | |
138 | uwb_rsv_destroy(rsv); | |
139 | else | |
140 | list_add_tail(&rsv->pal_node, &rc->dbg->rsvs); | |
141 | ||
142 | return ret; | |
143 | } | |
144 | ||
145 | static int cmd_rsv_terminate(struct uwb_rc *rc, | |
146 | struct uwb_dbg_cmd_rsv_terminate *cmd) | |
147 | { | |
148 | struct uwb_rsv *rsv, *found = NULL; | |
149 | int i = 0; | |
150 | ||
151 | list_for_each_entry(rsv, &rc->dbg->rsvs, pal_node) { | |
152 | if (i == cmd->index) { | |
153 | found = rsv; | |
154 | break; | |
155 | } | |
156 | } | |
157 | if (!found) | |
158 | return -EINVAL; | |
159 | ||
160 | list_del(&found->pal_node); | |
161 | uwb_rsv_terminate(found); | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | static int command_open(struct inode *inode, struct file *file) | |
167 | { | |
168 | file->private_data = inode->i_private; | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | static ssize_t command_write(struct file *file, const char __user *buf, | |
174 | size_t len, loff_t *off) | |
175 | { | |
176 | struct uwb_rc *rc = file->private_data; | |
177 | struct uwb_dbg_cmd cmd; | |
178 | int ret; | |
179 | ||
180 | if (len != sizeof(struct uwb_dbg_cmd)) | |
181 | return -EINVAL; | |
182 | ||
183 | if (copy_from_user(&cmd, buf, len) != 0) | |
184 | return -EFAULT; | |
185 | ||
186 | switch (cmd.type) { | |
187 | case UWB_DBG_CMD_RSV_ESTABLISH: | |
188 | ret = cmd_rsv_establish(rc, &cmd.rsv_establish); | |
189 | break; | |
190 | case UWB_DBG_CMD_RSV_TERMINATE: | |
191 | ret = cmd_rsv_terminate(rc, &cmd.rsv_terminate); | |
192 | break; | |
193 | default: | |
194 | return -EINVAL; | |
195 | } | |
196 | ||
197 | return ret < 0 ? ret : len; | |
198 | } | |
199 | ||
200 | static struct file_operations command_fops = { | |
201 | .open = command_open, | |
202 | .write = command_write, | |
203 | .read = NULL, | |
204 | .llseek = no_llseek, | |
205 | .owner = THIS_MODULE, | |
206 | }; | |
207 | ||
208 | static int reservations_print(struct seq_file *s, void *p) | |
209 | { | |
210 | struct uwb_rc *rc = s->private; | |
211 | struct uwb_rsv *rsv; | |
212 | ||
213 | mutex_lock(&rc->rsvs_mutex); | |
214 | ||
215 | list_for_each_entry(rsv, &rc->reservations, rc_node) { | |
216 | struct uwb_dev_addr devaddr; | |
217 | char owner[UWB_ADDR_STRSIZE], target[UWB_ADDR_STRSIZE]; | |
218 | bool is_owner; | |
219 | char buf[72]; | |
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 | bitmap_scnprintf(buf, sizeof(buf), rsv->mas.bm, UWB_NUM_MAS); | |
237 | seq_printf(s, " %s\n", buf); | |
238 | } | |
239 | ||
240 | mutex_unlock(&rc->rsvs_mutex); | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | static int reservations_open(struct inode *inode, struct file *file) | |
246 | { | |
247 | return single_open(file, reservations_print, inode->i_private); | |
248 | } | |
249 | ||
250 | static struct file_operations reservations_fops = { | |
251 | .open = reservations_open, | |
252 | .read = seq_read, | |
253 | .llseek = seq_lseek, | |
254 | .release = single_release, | |
255 | .owner = THIS_MODULE, | |
256 | }; | |
257 | ||
258 | static int drp_avail_print(struct seq_file *s, void *p) | |
259 | { | |
260 | struct uwb_rc *rc = s->private; | |
261 | char buf[72]; | |
262 | ||
263 | bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.global, UWB_NUM_MAS); | |
264 | seq_printf(s, "global: %s\n", buf); | |
265 | bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.local, UWB_NUM_MAS); | |
266 | seq_printf(s, "local: %s\n", buf); | |
267 | bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.pending, UWB_NUM_MAS); | |
268 | seq_printf(s, "pending: %s\n", buf); | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
273 | static int drp_avail_open(struct inode *inode, struct file *file) | |
274 | { | |
275 | return single_open(file, drp_avail_print, inode->i_private); | |
276 | } | |
277 | ||
278 | static struct file_operations drp_avail_fops = { | |
279 | .open = drp_avail_open, | |
280 | .read = seq_read, | |
281 | .llseek = seq_lseek, | |
282 | .release = single_release, | |
283 | .owner = THIS_MODULE, | |
284 | }; | |
285 | ||
286 | static void uwb_dbg_new_rsv(struct uwb_rsv *rsv) | |
287 | { | |
288 | struct uwb_rc *rc = rsv->rc; | |
289 | ||
290 | if (rc->dbg->accept) | |
291 | uwb_rsv_accept(rsv, uwb_dbg_rsv_cb, NULL); | |
292 | } | |
293 | ||
294 | /** | |
295 | * uwb_dbg_add_rc - add a debug interface for a radio controller | |
296 | * @rc: the radio controller | |
297 | */ | |
298 | void uwb_dbg_add_rc(struct uwb_rc *rc) | |
299 | { | |
300 | rc->dbg = kzalloc(sizeof(struct uwb_dbg), GFP_KERNEL); | |
301 | if (rc->dbg == NULL) | |
302 | return; | |
303 | ||
304 | INIT_LIST_HEAD(&rc->dbg->rsvs); | |
305 | ||
306 | uwb_pal_init(&rc->dbg->pal); | |
307 | rc->dbg->pal.new_rsv = uwb_dbg_new_rsv; | |
308 | uwb_pal_register(rc, &rc->dbg->pal); | |
309 | if (root_dir) { | |
310 | rc->dbg->root_d = debugfs_create_dir(dev_name(&rc->uwb_dev.dev), | |
311 | root_dir); | |
312 | rc->dbg->command_f = debugfs_create_file("command", 0200, | |
313 | rc->dbg->root_d, rc, | |
314 | &command_fops); | |
315 | rc->dbg->reservations_f = debugfs_create_file("reservations", 0444, | |
316 | rc->dbg->root_d, rc, | |
317 | &reservations_fops); | |
318 | rc->dbg->accept_f = debugfs_create_bool("accept", 0644, | |
319 | rc->dbg->root_d, | |
320 | &rc->dbg->accept); | |
321 | rc->dbg->drp_avail_f = debugfs_create_file("drp_avail", 0444, | |
322 | rc->dbg->root_d, rc, | |
323 | &drp_avail_fops); | |
324 | } | |
325 | } | |
326 | ||
327 | /** | |
328 | * uwb_dbg_add_rc - remove a radio controller's debug interface | |
329 | * @rc: the radio controller | |
330 | */ | |
331 | void uwb_dbg_del_rc(struct uwb_rc *rc) | |
332 | { | |
333 | struct uwb_rsv *rsv, *t; | |
334 | ||
335 | if (rc->dbg == NULL) | |
336 | return; | |
337 | ||
338 | list_for_each_entry_safe(rsv, t, &rc->dbg->rsvs, pal_node) { | |
339 | uwb_rsv_destroy(rsv); | |
340 | } | |
341 | ||
342 | uwb_pal_unregister(rc, &rc->dbg->pal); | |
343 | ||
344 | if (root_dir) { | |
345 | debugfs_remove(rc->dbg->drp_avail_f); | |
346 | debugfs_remove(rc->dbg->accept_f); | |
347 | debugfs_remove(rc->dbg->reservations_f); | |
348 | debugfs_remove(rc->dbg->command_f); | |
349 | debugfs_remove(rc->dbg->root_d); | |
350 | } | |
351 | } | |
352 | ||
353 | /** | |
354 | * uwb_dbg_exit - initialize the debug interface sub-module | |
355 | */ | |
356 | void uwb_dbg_init(void) | |
357 | { | |
358 | root_dir = debugfs_create_dir("uwb", NULL); | |
359 | } | |
360 | ||
361 | /** | |
362 | * uwb_dbg_exit - clean-up the debug interface sub-module | |
363 | */ | |
364 | void uwb_dbg_exit(void) | |
365 | { | |
366 | debugfs_remove(root_dir); | |
367 | } |