394 lines
9.2 KiB
C
394 lines
9.2 KiB
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;
|
||
|
|
|
||
|
|
bool 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;
|
||
|
|
|
||
|
|
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));
|
||
|
|
seq_printf(s, " %*pb\n", UWB_NUM_MAS, rsv->mas.bm);
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
seq_printf(s, "global: %*pb\n", UWB_NUM_MAS, rc->drp_avail.global);
|
||
|
|
seq_printf(s, "local: %*pb\n", UWB_NUM_MAS, rc->drp_avail.local);
|
||
|
|
seq_printf(s, "pending: %*pb\n", UWB_NUM_MAS, rc->drp_avail.pending);
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|