[GitHub/mt8127/android_kernel_alcatel_ttab.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>
 * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
 *
 * 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>

#include "uwb-internal.h"

/*
 * 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;
	spinlock_t list_lock;
};

static struct dentry *root_dir;

static void uwb_dbg_rsv_cb(struct uwb_rsv *rsv)
{
	struct uwb_dbg *dbg = rsv->pal_priv;

	uwb_rsv_dump("debug", rsv);

	if (rsv->state == UWB_RSV_STATE_NONE) {
		spin_lock(&dbg->list_lock);
		list_del(&rsv->pal_node);
		spin_unlock(&dbg->list_lock);
		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, rc->dbg);
	if (rsv == NULL) {
		uwb_dev_put(target);
		return -ENOMEM;
	}

	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->max_interval = cmd->max_interval;

	ret = uwb_rsv_establish(rsv);
	if (ret)
		uwb_rsv_destroy(rsv);
	else {
		spin_lock(&(rc->dbg)->list_lock);
		list_add_tail(&rsv->pal_node, &rc->dbg->rsvs);
		spin_unlock(&(rc->dbg)->list_lock);
	}
	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;

	spin_lock(&(rc->dbg)->list_lock);

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

	spin_unlock(&(rc->dbg)->list_lock);

	if (!found)
		return -EINVAL;

	uwb_rsv_terminate(found);
	uwb_rsv_put(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 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 = 0;
	
	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;
	case UWB_DBG_CMD_RADIO_START:
		ret = uwb_radio_start(&rc->dbg->pal);
		break;
	case UWB_DBG_CMD_RADIO_STOP:
		uwb_radio_stop(&rc->dbg->pal);
		break;
	default:
		return -EINVAL;
	}

	return ret < 0 ? ret : len;
}

static const struct file_operations command_fops = {
	.open	= simple_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 const 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 const 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_channel_changed(struct uwb_pal *pal, int channel)
{
	struct device *dev = &pal->rc->uwb_dev.dev;

	if (channel > 0)
		dev_info(dev, "debug: channel %d started\n", channel);
	else
		dev_info(dev, "debug: channel stopped\n");
}

static void uwb_dbg_new_rsv(struct uwb_pal *pal, struct uwb_rsv *rsv)
{
	struct uwb_dbg *dbg = container_of(pal, struct uwb_dbg, pal);

	if (dbg->accept) {
		spin_lock(&dbg->list_lock);
		list_add_tail(&rsv->pal_node, &dbg->rsvs);
		spin_unlock(&dbg->list_lock);
		uwb_rsv_accept(rsv, uwb_dbg_rsv_cb, dbg);
	}
}

/**
 * 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);
	spin_lock_init(&(rc->dbg)->list_lock);

	uwb_pal_init(&rc->dbg->pal);
	rc->dbg->pal.rc = rc;
	rc->dbg->pal.channel_changed = uwb_dbg_channel_changed;
	rc->dbg->pal.new_rsv = uwb_dbg_new_rsv;
	uwb_pal_register(&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->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);
}

/**
 * uwb_dbg_create_pal_dir - create a debugfs directory for a PAL
 * @pal: The PAL.
 */
struct dentry *uwb_dbg_create_pal_dir(struct uwb_pal *pal)
{
	struct uwb_rc *rc = pal->rc;

	if (root_dir && rc->dbg && rc->dbg->root_d && pal->name)
		return debugfs_create_dir(pal->name, rc->dbg->root_d);
	return NULL;
}
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>
e43ace89	7	* Copyright (C) 2008 Cambridge Silicon Radio Ltd.
599e8d80 DV	8	*
	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.
	12	*
	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.
	17	*
	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
	21	* 02110-1301, USA.
	22	*
	23	*
	24	* FIXME: doc
	25	*/
	26
	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>
599e8d80 DV	37
	38	#include "uwb-internal.h"
	39
599e8d80 DV	40	/*
	41	* Debug interface
	42	*
	43	* Per radio controller debugfs files (in uwb/uwbN/):
	44	*
	45	* command: Flexible command interface (see <linux/uwb/debug-cmd.h>).
	46	*
	47	* reservations: information on reservations.
	48	*
	49	* accept: Set to true (Y or 1) to accept reservation requests from
	50	* peers.
	51	*
	52	* drp_avail: DRP availability information.
	53	*/
	54
	55	struct uwb_dbg {
	56	struct uwb_pal pal;
	57
	58	u32 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;
5b37717a	66	spinlock_t list_lock;
599e8d80 DV	67	};
	68
	69	static struct dentry *root_dir;
	70
	71	static void uwb_dbg_rsv_cb(struct uwb_rsv *rsv)
	72	{
5b37717a	73	struct uwb_dbg *dbg = rsv->pal_priv;
599e8d80	74
5b37717a	75	uwb_rsv_dump("debug", rsv);
cae1c114 DV	76
cae1c114 DV	77	if (rsv->state == UWB_RSV_STATE_NONE) {
5b37717a	78	spin_lock(&dbg->list_lock);
cae1c114	79	list_del(&rsv->pal_node);
5b37717a	80	spin_unlock(&dbg->list_lock);
cae1c114 DV	81	uwb_rsv_destroy(rsv);
cae1c114 DV	82	}
599e8d80 DV	83	}
	84
	85	static 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
e4b49580	98	rsv = uwb_rsv_create(rc, uwb_dbg_rsv_cb, rc->dbg);
599e8d80 DV	99	if (rsv == NULL) {
	100	uwb_dev_put(target);
	101	return -ENOMEM;
	102	}
	103
5b37717a SP	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;
599e8d80 DV	110
	111	ret = uwb_rsv_establish(rsv);
	112	if (ret)
	113	uwb_rsv_destroy(rsv);
5b37717a SP	114	else {
5b37717a SP	115	spin_lock(&(rc->dbg)->list_lock);
599e8d80	116	list_add_tail(&rsv->pal_node, &rc->dbg->rsvs);
5b37717a SP	117	spin_unlock(&(rc->dbg)->list_lock);
5b37717a SP	118	}
599e8d80 DV	119	return ret;
	120	}
	121
	122	static 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
5b37717a SP	128	spin_lock(&(rc->dbg)->list_lock);
5b37717a SP	129
599e8d80 DV	130	list_for_each_entry(rsv, &rc->dbg->rsvs, pal_node) {
	131	if (i == cmd->index) {
	132	found = rsv;
5b37717a	133	uwb_rsv_get(found);
599e8d80 DV	134	break;
599e8d80 DV	135	}
cae1c114	136	i++;
599e8d80	137	}
5b37717a SP	138
	139	spin_unlock(&(rc->dbg)->list_lock);
	140
599e8d80 DV	141	if (!found)
	142	return -EINVAL;
	143
599e8d80	144	uwb_rsv_terminate(found);
5b37717a	145	uwb_rsv_put(found);
599e8d80 DV	146
	147	return 0;
	148	}
	149
6d5a681d SP	150	static 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
	157	static 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
599e8d80 DV	162	static 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;
6fae35f9	167	int ret = 0;
5b37717a	168
599e8d80 DV	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;
6d5a681d SP	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;
6fae35f9 DV	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;
599e8d80 DV	194	default:
	195	return -EINVAL;
	196	}
	197
	198	return ret < 0 ? ret : len;
	199	}
	200
828c0950	201	static const struct file_operations command_fops = {
234e3405	202	.open = simple_open,
599e8d80 DV	203	.write = command_write,
	204	.read = NULL,
	205	.llseek = no_llseek,
	206	.owner = THIS_MODULE,
	207	};
	208
	209	static 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	char buf[72];
	221
	222	uwb_dev_addr_print(owner, sizeof(owner), &rsv->owner->dev_addr);
	223	if (rsv->target.type == UWB_RSV_TARGET_DEV) {
	224	devaddr = rsv->target.dev->dev_addr;
	225	is_owner = &rc->uwb_dev == rsv->owner;
	226	} else {
	227	devaddr = rsv->target.devaddr;
	228	is_owner = true;
	229	}
	230	uwb_dev_addr_print(target, sizeof(target), &devaddr);
	231
	232	seq_printf(s, "%c %s -> %s: %s\n",
	233	is_owner ? 'O' : 'T',
	234	owner, target, uwb_rsv_state_str(rsv->state));
	235	seq_printf(s, " stream: %d type: %s\n",
	236	rsv->stream, uwb_rsv_type_str(rsv->type));
	237	bitmap_scnprintf(buf, sizeof(buf), rsv->mas.bm, UWB_NUM_MAS);
	238	seq_printf(s, " %s\n", buf);
	239	}
	240
	241	mutex_unlock(&rc->rsvs_mutex);
	242
	243	return 0;
	244	}
	245
	246	static int reservations_open(struct inode inode, struct file file)
	247	{
	248	return single_open(file, reservations_print, inode->i_private);
	249	}
	250
828c0950	251	static const struct file_operations reservations_fops = {
599e8d80 DV	252	.open = reservations_open,
	253	.read = seq_read,
	254	.llseek = seq_lseek,
	255	.release = single_release,
	256	.owner = THIS_MODULE,
	257	};
	258
	259	static int drp_avail_print(struct seq_file s, void p)
	260	{
	261	struct uwb_rc *rc = s->private;
	262	char buf[72];
	263
	264	bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.global, UWB_NUM_MAS);
	265	seq_printf(s, "global: %s\n", buf);
	266	bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.local, UWB_NUM_MAS);
	267	seq_printf(s, "local: %s\n", buf);
	268	bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.pending, UWB_NUM_MAS);
	269	seq_printf(s, "pending: %s\n", buf);
	270
	271	return 0;
	272	}
	273
	274	static int drp_avail_open(struct inode inode, struct file file)
	275	{
	276	return single_open(file, drp_avail_print, inode->i_private);
	277	}
	278
828c0950	279	static const struct file_operations drp_avail_fops = {
599e8d80 DV	280	.open = drp_avail_open,
	281	.read = seq_read,
	282	.llseek = seq_lseek,
	283	.release = single_release,
	284	.owner = THIS_MODULE,
	285	};
	286
6fae35f9 DV	287	static void uwb_dbg_channel_changed(struct uwb_pal *pal, int channel)
6fae35f9 DV	288	{
6fae35f9 DV	289	struct device *dev = &pal->rc->uwb_dev.dev;
	290
	291	if (channel > 0)
	292	dev_info(dev, "debug: channel %d started\n", channel);
	293	else
	294	dev_info(dev, "debug: channel stopped\n");
	295	}
	296
e17be2b2	297	static void uwb_dbg_new_rsv(struct uwb_pal pal, struct uwb_rsv rsv)
599e8d80	298	{
e17be2b2	299	struct uwb_dbg *dbg = container_of(pal, struct uwb_dbg, pal);
599e8d80	300
e17be2b2	301	if (dbg->accept) {
5b37717a	302	spin_lock(&dbg->list_lock);
e17be2b2	303	list_add_tail(&rsv->pal_node, &dbg->rsvs);
5b37717a	304	spin_unlock(&dbg->list_lock);
e17be2b2	305	uwb_rsv_accept(rsv, uwb_dbg_rsv_cb, dbg);
cae1c114	306	}
599e8d80 DV	307	}
	308
	309	/**
	310	* uwb_dbg_add_rc - add a debug interface for a radio controller
	311	* @rc: the radio controller
	312	*/
	313	void uwb_dbg_add_rc(struct uwb_rc *rc)
	314	{
	315	rc->dbg = kzalloc(sizeof(struct uwb_dbg), GFP_KERNEL);
	316	if (rc->dbg == NULL)
	317	return;
	318
	319	INIT_LIST_HEAD(&rc->dbg->rsvs);
5b37717a	320	spin_lock_init(&(rc->dbg)->list_lock);
599e8d80 DV	321
599e8d80 DV	322	uwb_pal_init(&rc->dbg->pal);
6fae35f9 DV	323	rc->dbg->pal.rc = rc;
6fae35f9 DV	324	rc->dbg->pal.channel_changed = uwb_dbg_channel_changed;
599e8d80	325	rc->dbg->pal.new_rsv = uwb_dbg_new_rsv;
6fae35f9 DV	326	uwb_pal_register(&rc->dbg->pal);
6fae35f9 DV	327
599e8d80 DV	328	if (root_dir) {
	329	rc->dbg->root_d = debugfs_create_dir(dev_name(&rc->uwb_dev.dev),
	330	root_dir);
	331	rc->dbg->command_f = debugfs_create_file("command", 0200,
	332	rc->dbg->root_d, rc,
	333	&command_fops);
	334	rc->dbg->reservations_f = debugfs_create_file("reservations", 0444,
	335	rc->dbg->root_d, rc,
	336	&reservations_fops);
	337	rc->dbg->accept_f = debugfs_create_bool("accept", 0644,
	338	rc->dbg->root_d,
	339	&rc->dbg->accept);
	340	rc->dbg->drp_avail_f = debugfs_create_file("drp_avail", 0444,
	341	rc->dbg->root_d, rc,
	342	&drp_avail_fops);
	343	}
	344	}
	345
	346	/**
6d5a681d	347	* uwb_dbg_del_rc - remove a radio controller's debug interface
599e8d80 DV	348	* @rc: the radio controller
	349	*/
	350	void uwb_dbg_del_rc(struct uwb_rc *rc)
	351	{
	352	struct uwb_rsv rsv, t;
	353
	354	if (rc->dbg == NULL)
	355	return;
	356
	357	list_for_each_entry_safe(rsv, t, &rc->dbg->rsvs, pal_node) {
cae1c114	358	uwb_rsv_terminate(rsv);
599e8d80 DV	359	}
599e8d80 DV	360
6fae35f9	361	uwb_pal_unregister(&rc->dbg->pal);
599e8d80 DV	362
	363	if (root_dir) {
	364	debugfs_remove(rc->dbg->drp_avail_f);
	365	debugfs_remove(rc->dbg->accept_f);
	366	debugfs_remove(rc->dbg->reservations_f);
	367	debugfs_remove(rc->dbg->command_f);
	368	debugfs_remove(rc->dbg->root_d);
	369	}
	370	}
	371
	372	/**
	373	* uwb_dbg_exit - initialize the debug interface sub-module
	374	*/
	375	void uwb_dbg_init(void)
	376	{
	377	root_dir = debugfs_create_dir("uwb", NULL);
	378	}
	379
	380	/**
	381	* uwb_dbg_exit - clean-up the debug interface sub-module
	382	*/
	383	void uwb_dbg_exit(void)
	384	{
	385	debugfs_remove(root_dir);
	386	}
dcc7461e DV	387
	388	/**
	389	* uwb_dbg_create_pal_dir - create a debugfs directory for a PAL
	390	* @pal: The PAL.
	391	*/
	392	struct dentry uwb_dbg_create_pal_dir(struct uwb_pal pal)
	393	{
	394	struct uwb_rc *rc = pal->rc;
	395
	396	if (root_dir && rc->dbg && rc->dbg->root_d && pal->name)
	397	return debugfs_create_dir(pal->name, rc->dbg->root_d);
	398	return NULL;
	399	}