5 * Copyright (C) 2005-2006 Intel Corporation
6 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
7 * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License version
11 * 2 as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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>
36 #include <linux/uwb/debug-cmd.h>
38 #include "uwb-internal.h"
43 * Per radio controller debugfs files (in uwb/uwbN/):
45 * command: Flexible command interface (see <linux/uwb/debug-cmd.h>).
47 * reservations: information on reservations.
49 * accept: Set to true (Y or 1) to accept reservation requests from
52 * drp_avail: DRP availability information.
59 struct list_head rsvs;
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;
69 static struct dentry *root_dir;
71 static void uwb_dbg_rsv_cb(struct uwb_rsv *rsv)
73 struct uwb_dbg *dbg = rsv->pal_priv;
75 uwb_rsv_dump("debug", rsv);
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);
85 static int cmd_rsv_establish(struct uwb_rc *rc,
86 struct uwb_dbg_cmd_rsv_establish *cmd)
88 struct uwb_mac_addr macaddr;
90 struct uwb_dev *target;
93 memcpy(&macaddr, cmd->target, sizeof(macaddr));
94 target = uwb_dev_get_by_macaddr(rc, &macaddr);
98 rsv = uwb_rsv_create(rc, uwb_dbg_rsv_cb, rc->dbg);
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;
111 ret = uwb_rsv_establish(rsv);
113 uwb_rsv_destroy(rsv);
115 spin_lock(&(rc->dbg)->list_lock);
116 list_add_tail(&rsv->pal_node, &rc->dbg->rsvs);
117 spin_unlock(&(rc->dbg)->list_lock);
122 static int cmd_rsv_terminate(struct uwb_rc *rc,
123 struct uwb_dbg_cmd_rsv_terminate *cmd)
125 struct uwb_rsv *rsv, *found = NULL;
128 spin_lock(&(rc->dbg)->list_lock);
130 list_for_each_entry(rsv, &rc->dbg->rsvs, pal_node) {
131 if (i == cmd->index) {
139 spin_unlock(&(rc->dbg)->list_lock);
144 uwb_rsv_terminate(found);
150 static int cmd_ie_add(struct uwb_rc *rc, struct uwb_dbg_cmd_ie *ie_to_add)
152 return uwb_rc_ie_add(rc,
153 (const struct uwb_ie_hdr *) ie_to_add->data,
157 static int cmd_ie_rm(struct uwb_rc *rc, struct uwb_dbg_cmd_ie *ie_to_rm)
159 return uwb_rc_ie_rm(rc, ie_to_rm->data[0]);
162 static ssize_t command_write(struct file *file, const char __user *buf,
163 size_t len, loff_t *off)
165 struct uwb_rc *rc = file->private_data;
166 struct uwb_dbg_cmd cmd;
169 if (len != sizeof(struct uwb_dbg_cmd))
172 if (copy_from_user(&cmd, buf, len) != 0)
176 case UWB_DBG_CMD_RSV_ESTABLISH:
177 ret = cmd_rsv_establish(rc, &cmd.rsv_establish);
179 case UWB_DBG_CMD_RSV_TERMINATE:
180 ret = cmd_rsv_terminate(rc, &cmd.rsv_terminate);
182 case UWB_DBG_CMD_IE_ADD:
183 ret = cmd_ie_add(rc, &cmd.ie_add);
185 case UWB_DBG_CMD_IE_RM:
186 ret = cmd_ie_rm(rc, &cmd.ie_rm);
188 case UWB_DBG_CMD_RADIO_START:
189 ret = uwb_radio_start(&rc->dbg->pal);
191 case UWB_DBG_CMD_RADIO_STOP:
192 uwb_radio_stop(&rc->dbg->pal);
198 return ret < 0 ? ret : len;
201 static const struct file_operations command_fops = {
203 .write = command_write,
206 .owner = THIS_MODULE,
209 static int reservations_print(struct seq_file *s, void *p)
211 struct uwb_rc *rc = s->private;
214 mutex_lock(&rc->rsvs_mutex);
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];
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;
226 devaddr = rsv->target.devaddr;
229 uwb_dev_addr_print(target, sizeof(target), &devaddr);
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);
239 mutex_unlock(&rc->rsvs_mutex);
244 static int reservations_open(struct inode *inode, struct file *file)
246 return single_open(file, reservations_print, inode->i_private);
249 static const struct file_operations reservations_fops = {
250 .open = reservations_open,
253 .release = single_release,
254 .owner = THIS_MODULE,
257 static int drp_avail_print(struct seq_file *s, void *p)
259 struct uwb_rc *rc = s->private;
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);
268 static int drp_avail_open(struct inode *inode, struct file *file)
270 return single_open(file, drp_avail_print, inode->i_private);
273 static const struct file_operations drp_avail_fops = {
274 .open = drp_avail_open,
277 .release = single_release,
278 .owner = THIS_MODULE,
281 static void uwb_dbg_channel_changed(struct uwb_pal *pal, int channel)
283 struct device *dev = &pal->rc->uwb_dev.dev;
286 dev_info(dev, "debug: channel %d started\n", channel);
288 dev_info(dev, "debug: channel stopped\n");
291 static void uwb_dbg_new_rsv(struct uwb_pal *pal, struct uwb_rsv *rsv)
293 struct uwb_dbg *dbg = container_of(pal, struct uwb_dbg, pal);
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);
304 * uwb_dbg_add_rc - add a debug interface for a radio controller
305 * @rc: the radio controller
307 void uwb_dbg_add_rc(struct uwb_rc *rc)
309 rc->dbg = kzalloc(sizeof(struct uwb_dbg), GFP_KERNEL);
313 INIT_LIST_HEAD(&rc->dbg->rsvs);
314 spin_lock_init(&(rc->dbg)->list_lock);
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);
323 rc->dbg->root_d = debugfs_create_dir(dev_name(&rc->uwb_dev.dev),
325 rc->dbg->command_f = debugfs_create_file("command", 0200,
328 rc->dbg->reservations_f = debugfs_create_file("reservations", 0444,
331 rc->dbg->accept_f = debugfs_create_bool("accept", 0644,
334 rc->dbg->drp_avail_f = debugfs_create_file("drp_avail", 0444,
341 * uwb_dbg_del_rc - remove a radio controller's debug interface
342 * @rc: the radio controller
344 void uwb_dbg_del_rc(struct uwb_rc *rc)
346 struct uwb_rsv *rsv, *t;
351 list_for_each_entry_safe(rsv, t, &rc->dbg->rsvs, pal_node) {
352 uwb_rsv_terminate(rsv);
355 uwb_pal_unregister(&rc->dbg->pal);
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);
367 * uwb_dbg_exit - initialize the debug interface sub-module
369 void uwb_dbg_init(void)
371 root_dir = debugfs_create_dir("uwb", NULL);
375 * uwb_dbg_exit - clean-up the debug interface sub-module
377 void uwb_dbg_exit(void)
379 debugfs_remove(root_dir);
383 * uwb_dbg_create_pal_dir - create a debugfs directory for a PAL
386 struct dentry *uwb_dbg_create_pal_dir(struct uwb_pal *pal)
388 struct uwb_rc *rc = pal->rc;
390 if (root_dir && rc->dbg && rc->dbg->root_d && pal->name)
391 return debugfs_create_dir(pal->name, rc->dbg->root_d);