[mirror_ubuntu-artful-kernel.git] / drivers / uwb / uwb-debug.c

/*
 * Ultra Wide Band
 * Debug support
 *
 * Copyright (C) 2005-2006 Intel Corporation
 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 *
 *
 * FIXME: doc
 */

#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/notifier.h>
#include <linux/device.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/seq_file.h>

#include <linux/uwb/debug-cmd.h>
#define D_LOCAL 0
#include <linux/uwb/debug.h>

#include "uwb-internal.h"

void dump_bytes(struct device *dev, const void *_buf, size_t rsize)
{
	const char *buf = _buf;
	char line[32];
	size_t offset = 0;
	int cnt, cnt2;
	for (cnt = 0; cnt < rsize; cnt += 8) {
		size_t rtop = rsize - cnt < 8 ? rsize - cnt : 8;
		for (offset = cnt2 = 0; cnt2 < rtop; cnt2++) {
			offset += scnprintf(line + offset, sizeof(line) - offset,
					    "%02x ", buf[cnt + cnt2] & 0xff);
		}
		if (dev)
			dev_info(dev, "%s\n", line);
		else
			printk(KERN_INFO "%s\n", line);
	}
}
EXPORT_SYMBOL_GPL(dump_bytes);

/*
 * Debug interface
 *
 * Per radio controller debugfs files (in uwb/uwbN/):
 *
 * command: Flexible command interface (see <linux/uwb/debug-cmd.h>).
 *
 * reservations: information on reservations.
 *
 * accept: Set to true (Y or 1) to accept reservation requests from
 * peers.
 *
 * drp_avail: DRP availability information.
 */

struct uwb_dbg {
	struct uwb_pal pal;

	u32 accept;
	struct list_head rsvs;

	struct dentry *root_d;
	struct dentry *command_f;
	struct dentry *reservations_f;
	struct dentry *accept_f;
	struct dentry *drp_avail_f;
};

static struct dentry *root_dir;

static void uwb_dbg_rsv_cb(struct uwb_rsv *rsv)
{
	struct uwb_rc *rc = rsv->rc;
	struct device *dev = &rc->uwb_dev.dev;
	struct uwb_dev_addr devaddr;
	char owner[UWB_ADDR_STRSIZE], target[UWB_ADDR_STRSIZE];

	uwb_dev_addr_print(owner, sizeof(owner), &rsv->owner->dev_addr);
	if (rsv->target.type == UWB_RSV_TARGET_DEV)
		devaddr = rsv->target.dev->dev_addr;
	else
		devaddr = rsv->target.devaddr;
	uwb_dev_addr_print(target, sizeof(target), &devaddr);

	dev_dbg(dev, "debug: rsv %s -> %s: %s\n",
		owner, target, uwb_rsv_state_str(rsv->state));

	if (rsv->state == UWB_RSV_STATE_NONE) {
		list_del(&rsv->pal_node);
		uwb_rsv_destroy(rsv);
	}
}

static int cmd_rsv_establish(struct uwb_rc *rc,
			     struct uwb_dbg_cmd_rsv_establish *cmd)
{
	struct uwb_mac_addr macaddr;
	struct uwb_rsv *rsv;
	struct uwb_dev *target;
	int ret;

	memcpy(&macaddr, cmd->target, sizeof(macaddr));
	target = uwb_dev_get_by_macaddr(rc, &macaddr);
	if (target == NULL)
		return -ENODEV;

	rsv = uwb_rsv_create(rc, uwb_dbg_rsv_cb, NULL);
	if (rsv == NULL) {
		uwb_dev_put(target);
		return -ENOMEM;
	}

	rsv->owner       = &rc->uwb_dev;
	rsv->target.type = UWB_RSV_TARGET_DEV;
	rsv->target.dev  = target;
	rsv->type        = cmd->type;
	rsv->max_mas     = cmd->max_mas;
	rsv->min_mas     = cmd->min_mas;
	rsv->sparsity    = cmd->sparsity;

	ret = uwb_rsv_establish(rsv);
	if (ret)
		uwb_rsv_destroy(rsv);
	else
		list_add_tail(&rsv->pal_node, &rc->dbg->rsvs);

	return ret;
}

static int cmd_rsv_terminate(struct uwb_rc *rc,
			     struct uwb_dbg_cmd_rsv_terminate *cmd)
{
	struct uwb_rsv *rsv, *found = NULL;
	int i = 0;

	list_for_each_entry(rsv, &rc->dbg->rsvs, pal_node) {
		if (i == cmd->index) {
			found = rsv;
			break;
		}
		i++;
	}
	if (!found)
		return -EINVAL;

	uwb_rsv_terminate(found);

	return 0;
}

static int cmd_ie_add(struct uwb_rc *rc, struct uwb_dbg_cmd_ie *ie_to_add)
{
	return uwb_rc_ie_add(rc,
			     (const struct uwb_ie_hdr *) ie_to_add->data,
			     ie_to_add->len);
}

static int cmd_ie_rm(struct uwb_rc *rc, struct uwb_dbg_cmd_ie *ie_to_rm)
{
	return uwb_rc_ie_rm(rc, ie_to_rm->data[0]);
}

static int command_open(struct inode *inode, struct file *file)
{
	file->private_data = inode->i_private;

	return 0;
}

static ssize_t command_write(struct file *file, const char __user *buf,
			 size_t len, loff_t *off)
{
	struct uwb_rc *rc = file->private_data;
	struct uwb_dbg_cmd cmd;
	int ret;

	if (len != sizeof(struct uwb_dbg_cmd))
		return -EINVAL;

	if (copy_from_user(&cmd, buf, len) != 0)
		return -EFAULT;

	switch (cmd.type) {
	case UWB_DBG_CMD_RSV_ESTABLISH:
		ret = cmd_rsv_establish(rc, &cmd.rsv_establish);
		break;
	case UWB_DBG_CMD_RSV_TERMINATE:
		ret = cmd_rsv_terminate(rc, &cmd.rsv_terminate);
		break;
	case UWB_DBG_CMD_IE_ADD:
		ret = cmd_ie_add(rc, &cmd.ie_add);
		break;
	case UWB_DBG_CMD_IE_RM:
		ret = cmd_ie_rm(rc, &cmd.ie_rm);
		break;
	default:
		return -EINVAL;
	}

	return ret < 0 ? ret : len;
}

static struct file_operations command_fops = {
	.open   = command_open,
	.write  = command_write,
	.read   = NULL,
	.llseek = no_llseek,
	.owner  = THIS_MODULE,
};

static int reservations_print(struct seq_file *s, void *p)
{
	struct uwb_rc *rc = s->private;
	struct uwb_rsv *rsv;

	mutex_lock(&rc->rsvs_mutex);

	list_for_each_entry(rsv, &rc->reservations, rc_node) {
		struct uwb_dev_addr devaddr;
		char owner[UWB_ADDR_STRSIZE], target[UWB_ADDR_STRSIZE];
		bool is_owner;
		char buf[72];

		uwb_dev_addr_print(owner, sizeof(owner), &rsv->owner->dev_addr);
		if (rsv->target.type == UWB_RSV_TARGET_DEV) {
			devaddr = rsv->target.dev->dev_addr;
			is_owner = &rc->uwb_dev == rsv->owner;
		} else {
			devaddr = rsv->target.devaddr;
			is_owner = true;
		}
		uwb_dev_addr_print(target, sizeof(target), &devaddr);

		seq_printf(s, "%c %s -> %s: %s\n",
			   is_owner ? 'O' : 'T',
			   owner, target, uwb_rsv_state_str(rsv->state));
		seq_printf(s, "  stream: %d  type: %s\n",
			   rsv->stream, uwb_rsv_type_str(rsv->type));
		bitmap_scnprintf(buf, sizeof(buf), rsv->mas.bm, UWB_NUM_MAS);
		seq_printf(s, "  %s\n", buf);
	}

	mutex_unlock(&rc->rsvs_mutex);

	return 0;
}

static int reservations_open(struct inode *inode, struct file *file)
{
	return single_open(file, reservations_print, inode->i_private);
}

static struct file_operations reservations_fops = {
	.open    = reservations_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = single_release,
	.owner   = THIS_MODULE,
};

static int drp_avail_print(struct seq_file *s, void *p)
{
	struct uwb_rc *rc = s->private;
	char buf[72];

	bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.global, UWB_NUM_MAS);
	seq_printf(s, "global:  %s\n", buf);
	bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.local, UWB_NUM_MAS);
	seq_printf(s, "local:   %s\n", buf);
	bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.pending, UWB_NUM_MAS);
	seq_printf(s, "pending: %s\n", buf);

	return 0;
}

static int drp_avail_open(struct inode *inode, struct file *file)
{
	return single_open(file, drp_avail_print, inode->i_private);
}

static struct file_operations drp_avail_fops = {
	.open    = drp_avail_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = single_release,
	.owner   = THIS_MODULE,
};

static void uwb_dbg_new_rsv(struct uwb_rsv *rsv)
{
	struct uwb_rc *rc = rsv->rc;

	if (rc->dbg->accept) {
		list_add_tail(&rsv->pal_node, &rc->dbg->rsvs);
		uwb_rsv_accept(rsv, uwb_dbg_rsv_cb, NULL);
	}
}

/**
 * uwb_dbg_add_rc - add a debug interface for a radio controller
 * @rc: the radio controller
 */
void uwb_dbg_add_rc(struct uwb_rc *rc)
{
	rc->dbg = kzalloc(sizeof(struct uwb_dbg), GFP_KERNEL);
	if (rc->dbg == NULL)
		return;

	INIT_LIST_HEAD(&rc->dbg->rsvs);

	uwb_pal_init(&rc->dbg->pal);
	rc->dbg->pal.new_rsv = uwb_dbg_new_rsv;
	uwb_pal_register(rc, &rc->dbg->pal);
	if (root_dir) {
		rc->dbg->root_d = debugfs_create_dir(dev_name(&rc->uwb_dev.dev),
						     root_dir);
		rc->dbg->command_f = debugfs_create_file("command", 0200,
							 rc->dbg->root_d, rc,
							 &command_fops);
		rc->dbg->reservations_f = debugfs_create_file("reservations", 0444,
							      rc->dbg->root_d, rc,
							      &reservations_fops);
		rc->dbg->accept_f = debugfs_create_bool("accept", 0644,
							rc->dbg->root_d,
							&rc->dbg->accept);
		rc->dbg->drp_avail_f = debugfs_create_file("drp_avail", 0444,
							   rc->dbg->root_d, rc,
							   &drp_avail_fops);
	}
}

/**
 * uwb_dbg_del_rc - remove a radio controller's debug interface
 * @rc: the radio controller
 */
void uwb_dbg_del_rc(struct uwb_rc *rc)
{
	struct uwb_rsv *rsv, *t;

	if (rc->dbg == NULL)
		return;

	list_for_each_entry_safe(rsv, t, &rc->dbg->rsvs, pal_node) {
		uwb_rsv_terminate(rsv);
	}

	uwb_pal_unregister(rc, &rc->dbg->pal);

	if (root_dir) {
		debugfs_remove(rc->dbg->drp_avail_f);
		debugfs_remove(rc->dbg->accept_f);
		debugfs_remove(rc->dbg->reservations_f);
		debugfs_remove(rc->dbg->command_f);
		debugfs_remove(rc->dbg->root_d);
	}
}

/**
 * uwb_dbg_exit - initialize the debug interface sub-module
 */
void uwb_dbg_init(void)
{
	root_dir = debugfs_create_dir("uwb", NULL);
}

/**
 * uwb_dbg_exit - clean-up the debug interface sub-module
 */
void uwb_dbg_exit(void)
{
	debugfs_remove(root_dir);
}
Commit	Line	Data
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));
cae1c114 DV	107
	108	if (rsv->state == UWB_RSV_STATE_NONE) {
	109	list_del(&rsv->pal_node);
	110	uwb_rsv_destroy(rsv);
	111	}
599e8d80 DV	112	}
	113
	114	static int cmd_rsv_establish(struct uwb_rc *rc,
	115	struct uwb_dbg_cmd_rsv_establish *cmd)
	116	{
	117	struct uwb_mac_addr macaddr;
	118	struct uwb_rsv *rsv;
	119	struct uwb_dev *target;
	120	int ret;
	121
	122	memcpy(&macaddr, cmd->target, sizeof(macaddr));
	123	target = uwb_dev_get_by_macaddr(rc, &macaddr);
	124	if (target == NULL)
	125	return -ENODEV;
	126
	127	rsv = uwb_rsv_create(rc, uwb_dbg_rsv_cb, NULL);
	128	if (rsv == NULL) {
	129	uwb_dev_put(target);
	130	return -ENOMEM;
	131	}
	132
	133	rsv->owner = &rc->uwb_dev;
	134	rsv->target.type = UWB_RSV_TARGET_DEV;
	135	rsv->target.dev = target;
	136	rsv->type = cmd->type;
	137	rsv->max_mas = cmd->max_mas;
	138	rsv->min_mas = cmd->min_mas;
	139	rsv->sparsity = cmd->sparsity;
	140
	141	ret = uwb_rsv_establish(rsv);
	142	if (ret)
	143	uwb_rsv_destroy(rsv);
	144	else
	145	list_add_tail(&rsv->pal_node, &rc->dbg->rsvs);
	146
	147	return ret;
	148	}
	149
	150	static int cmd_rsv_terminate(struct uwb_rc *rc,
	151	struct uwb_dbg_cmd_rsv_terminate *cmd)
	152	{
	153	struct uwb_rsv rsv, found = NULL;
	154	int i = 0;
	155
	156	list_for_each_entry(rsv, &rc->dbg->rsvs, pal_node) {
	157	if (i == cmd->index) {
	158	found = rsv;
	159	break;
	160	}
cae1c114	161	i++;
599e8d80 DV	162	}
	163	if (!found)
	164	return -EINVAL;
	165
599e8d80 DV	166	uwb_rsv_terminate(found);
	167
	168	return 0;
	169	}
	170
6d5a681d SP	171	static int cmd_ie_add(struct uwb_rc rc, struct uwb_dbg_cmd_ie ie_to_add)
	172	{
	173	return uwb_rc_ie_add(rc,
	174	(const struct uwb_ie_hdr *) ie_to_add->data,
	175	ie_to_add->len);
	176	}
	177
	178	static int cmd_ie_rm(struct uwb_rc rc, struct uwb_dbg_cmd_ie ie_to_rm)
	179	{
	180	return uwb_rc_ie_rm(rc, ie_to_rm->data[0]);
	181	}
	182
599e8d80 DV	183	static int command_open(struct inode inode, struct file file)
	184	{
	185	file->private_data = inode->i_private;
	186
	187	return 0;
	188	}
	189
	190	static ssize_t command_write(struct file file, const char __user buf,
	191	size_t len, loff_t *off)
	192	{
	193	struct uwb_rc *rc = file->private_data;
	194	struct uwb_dbg_cmd cmd;
	195	int ret;
	196
	197	if (len != sizeof(struct uwb_dbg_cmd))
	198	return -EINVAL;
	199
	200	if (copy_from_user(&cmd, buf, len) != 0)
	201	return -EFAULT;
	202
	203	switch (cmd.type) {
	204	case UWB_DBG_CMD_RSV_ESTABLISH:
	205	ret = cmd_rsv_establish(rc, &cmd.rsv_establish);
	206	break;
	207	case UWB_DBG_CMD_RSV_TERMINATE:
	208	ret = cmd_rsv_terminate(rc, &cmd.rsv_terminate);
	209	break;
6d5a681d SP	210	case UWB_DBG_CMD_IE_ADD:
	211	ret = cmd_ie_add(rc, &cmd.ie_add);
	212	break;
	213	case UWB_DBG_CMD_IE_RM:
	214	ret = cmd_ie_rm(rc, &cmd.ie_rm);
	215	break;
599e8d80 DV	216	default:
	217	return -EINVAL;
	218	}
	219
	220	return ret < 0 ? ret : len;
	221	}
	222
	223	static struct file_operations command_fops = {
	224	.open = command_open,
	225	.write = command_write,
	226	.read = NULL,
	227	.llseek = no_llseek,
	228	.owner = THIS_MODULE,
	229	};
	230
	231	static int reservations_print(struct seq_file s, void p)
	232	{
	233	struct uwb_rc *rc = s->private;
	234	struct uwb_rsv *rsv;
	235
	236	mutex_lock(&rc->rsvs_mutex);
	237
	238	list_for_each_entry(rsv, &rc->reservations, rc_node) {
	239	struct uwb_dev_addr devaddr;
	240	char owner[UWB_ADDR_STRSIZE], target[UWB_ADDR_STRSIZE];
	241	bool is_owner;
	242	char buf[72];
	243
	244	uwb_dev_addr_print(owner, sizeof(owner), &rsv->owner->dev_addr);
	245	if (rsv->target.type == UWB_RSV_TARGET_DEV) {
	246	devaddr = rsv->target.dev->dev_addr;
	247	is_owner = &rc->uwb_dev == rsv->owner;
	248	} else {
	249	devaddr = rsv->target.devaddr;
	250	is_owner = true;
	251	}
	252	uwb_dev_addr_print(target, sizeof(target), &devaddr);
	253
	254	seq_printf(s, "%c %s -> %s: %s\n",
	255	is_owner ? 'O' : 'T',
	256	owner, target, uwb_rsv_state_str(rsv->state));
	257	seq_printf(s, " stream: %d type: %s\n",
	258	rsv->stream, uwb_rsv_type_str(rsv->type));
	259	bitmap_scnprintf(buf, sizeof(buf), rsv->mas.bm, UWB_NUM_MAS);
	260	seq_printf(s, " %s\n", buf);
	261	}
	262
	263	mutex_unlock(&rc->rsvs_mutex);
	264
	265	return 0;
	266	}
	267
	268	static int reservations_open(struct inode inode, struct file file)
	269	{
	270	return single_open(file, reservations_print, inode->i_private);
	271	}
	272
	273	static struct file_operations reservations_fops = {
	274	.open = reservations_open,
	275	.read = seq_read,
	276	.llseek = seq_lseek,
	277	.release = single_release,
	278	.owner = THIS_MODULE,
	279	};
280
281	static int drp_avail_print(struct seq_file s, void p)
282	{
283	struct uwb_rc *rc = s->private;
284	char buf[72];
285
286	bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.global, UWB_NUM_MAS);
287	seq_printf(s, "global: %s\n", buf);
288	bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.local, UWB_NUM_MAS);
289	seq_printf(s, "local: %s\n", buf);
290	bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.pending, UWB_NUM_MAS);
291	seq_printf(s, "pending: %s\n", buf);
292
293	return 0;
294	}
295
296	static int drp_avail_open(struct inode inode, struct file file)
297	{
298	return single_open(file, drp_avail_print, inode->i_private);
299	}
300
301	static struct file_operations drp_avail_fops = {
302	.open = drp_avail_open,
303	.read = seq_read,
304	.llseek = seq_lseek,
305	.release = single_release,
306	.owner = THIS_MODULE,
307	};
308
309	static void uwb_dbg_new_rsv(struct uwb_rsv *rsv)
310	{
311	struct uwb_rc *rc = rsv->rc;
312
cae1c114 DV	313	if (rc->dbg->accept) {
cae1c114 DV	314	list_add_tail(&rsv->pal_node, &rc->dbg->rsvs);
599e8d80	315	uwb_rsv_accept(rsv, uwb_dbg_rsv_cb, NULL);
cae1c114	316	}
599e8d80 DV	317	}
	318
	319	/**
	320	* uwb_dbg_add_rc - add a debug interface for a radio controller
	321	* @rc: the radio controller
	322	*/
	323	void uwb_dbg_add_rc(struct uwb_rc *rc)
	324	{
	325	rc->dbg = kzalloc(sizeof(struct uwb_dbg), GFP_KERNEL);
	326	if (rc->dbg == NULL)
	327	return;
	328
	329	INIT_LIST_HEAD(&rc->dbg->rsvs);
	330
	331	uwb_pal_init(&rc->dbg->pal);
	332	rc->dbg->pal.new_rsv = uwb_dbg_new_rsv;
	333	uwb_pal_register(rc, &rc->dbg->pal);
	334	if (root_dir) {
	335	rc->dbg->root_d = debugfs_create_dir(dev_name(&rc->uwb_dev.dev),
	336	root_dir);
	337	rc->dbg->command_f = debugfs_create_file("command", 0200,
	338	rc->dbg->root_d, rc,
	339	&command_fops);
	340	rc->dbg->reservations_f = debugfs_create_file("reservations", 0444,
	341	rc->dbg->root_d, rc,
	342	&reservations_fops);
	343	rc->dbg->accept_f = debugfs_create_bool("accept", 0644,
	344	rc->dbg->root_d,
	345	&rc->dbg->accept);
	346	rc->dbg->drp_avail_f = debugfs_create_file("drp_avail", 0444,
	347	rc->dbg->root_d, rc,
	348	&drp_avail_fops);
	349	}
	350	}
	351
	352	/**
6d5a681d	353	* uwb_dbg_del_rc - remove a radio controller's debug interface
599e8d80 DV	354	* @rc: the radio controller
	355	*/
	356	void uwb_dbg_del_rc(struct uwb_rc *rc)
	357	{
	358	struct uwb_rsv rsv, t;
	359
	360	if (rc->dbg == NULL)
	361	return;
	362
	363	list_for_each_entry_safe(rsv, t, &rc->dbg->rsvs, pal_node) {
cae1c114	364	uwb_rsv_terminate(rsv);
599e8d80 DV	365	}
	366
	367	uwb_pal_unregister(rc, &rc->dbg->pal);
	368
	369	if (root_dir) {
	370	debugfs_remove(rc->dbg->drp_avail_f);
	371	debugfs_remove(rc->dbg->accept_f);
	372	debugfs_remove(rc->dbg->reservations_f);
	373	debugfs_remove(rc->dbg->command_f);
	374	debugfs_remove(rc->dbg->root_d);
	375	}
	376	}
	377
	378	/**
	379	* uwb_dbg_exit - initialize the debug interface sub-module
	380	*/
	381	void uwb_dbg_init(void)
	382	{
	383	root_dir = debugfs_create_dir("uwb", NULL);
	384	}
	385
	386	/**
	387	* uwb_dbg_exit - clean-up the debug interface sub-module
	388	*/
	389	void uwb_dbg_exit(void)
	390	{
	391	debugfs_remove(root_dir);
	392	}