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uwb: add the UWB stack (debug support)
Add various debugfs files, principaly for the reservation manager. Signed-off-by: David Vrabel <david.vrabel@csr.com>
This commit is contained in:
David Vrabel
David Vrabel
parent
8cc13a0947
commit
599e8d80a2
367
drivers/uwb/uwb-debug.c
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367
drivers/uwb/uwb-debug.c
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/*
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* Ultra Wide Band
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* Debug support
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*
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* Copyright (C) 2005-2006 Intel Corporation
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* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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*
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* FIXME: doc
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*/
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#include <linux/spinlock.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/notifier.h>
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#include <linux/device.h>
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#include <linux/debugfs.h>
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#include <linux/uaccess.h>
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#include <linux/seq_file.h>
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#include <linux/uwb/debug-cmd.h>
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#define D_LOCAL 0
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#include <linux/uwb/debug.h>
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#include "uwb-internal.h"
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void dump_bytes(struct device *dev, const void *_buf, size_t rsize)
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{
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const char *buf = _buf;
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char line[32];
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size_t offset = 0;
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int cnt, cnt2;
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for (cnt = 0; cnt < rsize; cnt += 8) {
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size_t rtop = rsize - cnt < 8 ? rsize - cnt : 8;
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for (offset = cnt2 = 0; cnt2 < rtop; cnt2++) {
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offset += scnprintf(line + offset, sizeof(line) - offset,
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"%02x ", buf[cnt + cnt2] & 0xff);
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}
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if (dev)
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dev_info(dev, "%s\n", line);
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else
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printk(KERN_INFO "%s\n", line);
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}
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}
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EXPORT_SYMBOL_GPL(dump_bytes);
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/*
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* Debug interface
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*
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* Per radio controller debugfs files (in uwb/uwbN/):
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*
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* command: Flexible command interface (see <linux/uwb/debug-cmd.h>).
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*
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* reservations: information on reservations.
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*
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* accept: Set to true (Y or 1) to accept reservation requests from
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* peers.
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*
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* drp_avail: DRP availability information.
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*/
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struct uwb_dbg {
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struct uwb_pal pal;
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u32 accept;
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struct list_head rsvs;
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struct dentry *root_d;
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struct dentry *command_f;
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struct dentry *reservations_f;
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struct dentry *accept_f;
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struct dentry *drp_avail_f;
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};
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static struct dentry *root_dir;
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static void uwb_dbg_rsv_cb(struct uwb_rsv *rsv)
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{
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struct uwb_rc *rc = rsv->rc;
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struct device *dev = &rc->uwb_dev.dev;
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struct uwb_dev_addr devaddr;
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char owner[UWB_ADDR_STRSIZE], target[UWB_ADDR_STRSIZE];
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uwb_dev_addr_print(owner, sizeof(owner), &rsv->owner->dev_addr);
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if (rsv->target.type == UWB_RSV_TARGET_DEV)
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devaddr = rsv->target.dev->dev_addr;
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else
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devaddr = rsv->target.devaddr;
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uwb_dev_addr_print(target, sizeof(target), &devaddr);
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dev_dbg(dev, "debug: rsv %s -> %s: %s\n",
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owner, target, uwb_rsv_state_str(rsv->state));
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}
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static int cmd_rsv_establish(struct uwb_rc *rc,
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struct uwb_dbg_cmd_rsv_establish *cmd)
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{
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struct uwb_mac_addr macaddr;
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struct uwb_rsv *rsv;
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struct uwb_dev *target;
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int ret;
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memcpy(&macaddr, cmd->target, sizeof(macaddr));
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target = uwb_dev_get_by_macaddr(rc, &macaddr);
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if (target == NULL)
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return -ENODEV;
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rsv = uwb_rsv_create(rc, uwb_dbg_rsv_cb, NULL);
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if (rsv == NULL) {
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uwb_dev_put(target);
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return -ENOMEM;
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}
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rsv->owner = &rc->uwb_dev;
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rsv->target.type = UWB_RSV_TARGET_DEV;
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rsv->target.dev = target;
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rsv->type = cmd->type;
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rsv->max_mas = cmd->max_mas;
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rsv->min_mas = cmd->min_mas;
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rsv->sparsity = cmd->sparsity;
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ret = uwb_rsv_establish(rsv);
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if (ret)
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uwb_rsv_destroy(rsv);
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else
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list_add_tail(&rsv->pal_node, &rc->dbg->rsvs);
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return ret;
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}
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static int cmd_rsv_terminate(struct uwb_rc *rc,
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struct uwb_dbg_cmd_rsv_terminate *cmd)
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{
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struct uwb_rsv *rsv, *found = NULL;
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int i = 0;
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list_for_each_entry(rsv, &rc->dbg->rsvs, pal_node) {
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if (i == cmd->index) {
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found = rsv;
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break;
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}
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}
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if (!found)
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return -EINVAL;
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list_del(&found->pal_node);
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uwb_rsv_terminate(found);
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return 0;
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}
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static int command_open(struct inode *inode, struct file *file)
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{
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file->private_data = inode->i_private;
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return 0;
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}
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static ssize_t command_write(struct file *file, const char __user *buf,
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size_t len, loff_t *off)
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{
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struct uwb_rc *rc = file->private_data;
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struct uwb_dbg_cmd cmd;
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int ret;
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if (len != sizeof(struct uwb_dbg_cmd))
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return -EINVAL;
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if (copy_from_user(&cmd, buf, len) != 0)
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return -EFAULT;
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switch (cmd.type) {
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case UWB_DBG_CMD_RSV_ESTABLISH:
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ret = cmd_rsv_establish(rc, &cmd.rsv_establish);
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break;
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case UWB_DBG_CMD_RSV_TERMINATE:
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ret = cmd_rsv_terminate(rc, &cmd.rsv_terminate);
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break;
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default:
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return -EINVAL;
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}
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return ret < 0 ? ret : len;
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}
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static struct file_operations command_fops = {
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.open = command_open,
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.write = command_write,
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.read = NULL,
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.llseek = no_llseek,
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.owner = THIS_MODULE,
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};
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static int reservations_print(struct seq_file *s, void *p)
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{
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struct uwb_rc *rc = s->private;
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struct uwb_rsv *rsv;
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mutex_lock(&rc->rsvs_mutex);
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list_for_each_entry(rsv, &rc->reservations, rc_node) {
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struct uwb_dev_addr devaddr;
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char owner[UWB_ADDR_STRSIZE], target[UWB_ADDR_STRSIZE];
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bool is_owner;
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char buf[72];
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uwb_dev_addr_print(owner, sizeof(owner), &rsv->owner->dev_addr);
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if (rsv->target.type == UWB_RSV_TARGET_DEV) {
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devaddr = rsv->target.dev->dev_addr;
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is_owner = &rc->uwb_dev == rsv->owner;
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} else {
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devaddr = rsv->target.devaddr;
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is_owner = true;
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}
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uwb_dev_addr_print(target, sizeof(target), &devaddr);
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seq_printf(s, "%c %s -> %s: %s\n",
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is_owner ? 'O' : 'T',
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owner, target, uwb_rsv_state_str(rsv->state));
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seq_printf(s, " stream: %d type: %s\n",
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rsv->stream, uwb_rsv_type_str(rsv->type));
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bitmap_scnprintf(buf, sizeof(buf), rsv->mas.bm, UWB_NUM_MAS);
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seq_printf(s, " %s\n", buf);
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}
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mutex_unlock(&rc->rsvs_mutex);
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return 0;
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}
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static int reservations_open(struct inode *inode, struct file *file)
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{
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return single_open(file, reservations_print, inode->i_private);
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}
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static struct file_operations reservations_fops = {
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.open = reservations_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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.owner = THIS_MODULE,
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};
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static int drp_avail_print(struct seq_file *s, void *p)
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{
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struct uwb_rc *rc = s->private;
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char buf[72];
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bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.global, UWB_NUM_MAS);
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seq_printf(s, "global: %s\n", buf);
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bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.local, UWB_NUM_MAS);
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seq_printf(s, "local: %s\n", buf);
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bitmap_scnprintf(buf, sizeof(buf), rc->drp_avail.pending, UWB_NUM_MAS);
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seq_printf(s, "pending: %s\n", buf);
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return 0;
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}
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static int drp_avail_open(struct inode *inode, struct file *file)
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{
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return single_open(file, drp_avail_print, inode->i_private);
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}
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static struct file_operations drp_avail_fops = {
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.open = drp_avail_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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.owner = THIS_MODULE,
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};
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static void uwb_dbg_new_rsv(struct uwb_rsv *rsv)
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{
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struct uwb_rc *rc = rsv->rc;
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if (rc->dbg->accept)
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uwb_rsv_accept(rsv, uwb_dbg_rsv_cb, NULL);
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}
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/**
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* uwb_dbg_add_rc - add a debug interface for a radio controller
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* @rc: the radio controller
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*/
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void uwb_dbg_add_rc(struct uwb_rc *rc)
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{
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rc->dbg = kzalloc(sizeof(struct uwb_dbg), GFP_KERNEL);
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if (rc->dbg == NULL)
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return;
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INIT_LIST_HEAD(&rc->dbg->rsvs);
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uwb_pal_init(&rc->dbg->pal);
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rc->dbg->pal.new_rsv = uwb_dbg_new_rsv;
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uwb_pal_register(rc, &rc->dbg->pal);
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if (root_dir) {
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rc->dbg->root_d = debugfs_create_dir(dev_name(&rc->uwb_dev.dev),
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root_dir);
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rc->dbg->command_f = debugfs_create_file("command", 0200,
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rc->dbg->root_d, rc,
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&command_fops);
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rc->dbg->reservations_f = debugfs_create_file("reservations", 0444,
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rc->dbg->root_d, rc,
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&reservations_fops);
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rc->dbg->accept_f = debugfs_create_bool("accept", 0644,
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rc->dbg->root_d,
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&rc->dbg->accept);
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rc->dbg->drp_avail_f = debugfs_create_file("drp_avail", 0444,
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rc->dbg->root_d, rc,
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&drp_avail_fops);
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}
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}
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/**
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* uwb_dbg_add_rc - remove a radio controller's debug interface
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* @rc: the radio controller
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*/
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void uwb_dbg_del_rc(struct uwb_rc *rc)
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{
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struct uwb_rsv *rsv, *t;
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if (rc->dbg == NULL)
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return;
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list_for_each_entry_safe(rsv, t, &rc->dbg->rsvs, pal_node) {
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uwb_rsv_destroy(rsv);
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}
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uwb_pal_unregister(rc, &rc->dbg->pal);
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if (root_dir) {
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debugfs_remove(rc->dbg->drp_avail_f);
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debugfs_remove(rc->dbg->accept_f);
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debugfs_remove(rc->dbg->reservations_f);
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debugfs_remove(rc->dbg->command_f);
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debugfs_remove(rc->dbg->root_d);
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}
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}
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/**
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* uwb_dbg_exit - initialize the debug interface sub-module
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*/
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void uwb_dbg_init(void)
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{
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root_dir = debugfs_create_dir("uwb", NULL);
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}
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/**
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* uwb_dbg_exit - clean-up the debug interface sub-module
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*/
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void uwb_dbg_exit(void)
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{
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debugfs_remove(root_dir);
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}
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