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authorDavid Vrabel <david.vrabel@csr.com>2008-09-17 11:34:10 -0400
committerDavid Vrabel <dv02@dv02pc01.europe.root.pri>2008-09-17 11:54:25 -0400
commit599e8d80a2cdf4f65fc49b31b27a49235c78acfe (patch)
tree94b883af697b56c3de0be3a1d66840c39de34733 /drivers/uwb/uwb-debug.c
parent8cc13a09474bb30d15dbf449767bb6d0198a8bf8 (diff)
uwb: add the UWB stack (debug support)
Add various debugfs files, principaly for the reservation manager. Signed-off-by: David Vrabel <david.vrabel@csr.com>
Diffstat (limited to 'drivers/uwb/uwb-debug.c')
-rw-r--r--drivers/uwb/uwb-debug.c367
1 files changed, 367 insertions, 0 deletions
diff --git a/drivers/uwb/uwb-debug.c b/drivers/uwb/uwb-debug.c
new file mode 100644
index 000000000000..6d232c35d07d
--- /dev/null
+++ b/drivers/uwb/uwb-debug.c
@@ -0,0 +1,367 @@
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
41void 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}
59EXPORT_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
76struct 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
89static struct dentry *root_dir;
90
91static 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
109static 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
145static 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
166static int command_open(struct inode *inode, struct file *file)
167{
168 file->private_data = inode->i_private;
169
170 return 0;
171}
172
173static 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
200static 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
208static 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
245static int reservations_open(struct inode *inode, struct file *file)
246{
247 return single_open(file, reservations_print, inode->i_private);
248}
249
250static 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
258static 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
273static int drp_avail_open(struct inode *inode, struct file *file)
274{
275 return single_open(file, drp_avail_print, inode->i_private);
276}
277
278static 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
286static 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 */
298void 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 */
331void 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 */
356void 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 */
364void uwb_dbg_exit(void)
365{
366 debugfs_remove(root_dir);
367}