| /* |
| * 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> |
| |
| #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; |
| 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 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 = 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 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_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; |
| } |