drivers/net/wireless/b43/debugfs.c - kernel/msm-4.9 - Gitiles

 /*

   Broadcom B43 wireless driver

   debugfs driver debugging code

   Copyright (c) 2005-2007 Michael Buesch <mb@bu3sch.de>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   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; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
   Boston, MA 02110-1301, USA.

 */

 #include <linux/fs.h>
 #include <linux/debugfs.h>
 #include <linux/slab.h>
 #include <linux/netdevice.h>
 #include <linux/pci.h>
 #include <linux/mutex.h>

 #include "b43.h"
 #include "main.h"
 #include "debugfs.h"
 #include "dma.h"
 #include "xmit.h"


 /* The root directory. */
 static struct dentry *rootdir;

 struct b43_debugfs_fops {
 	ssize_t (*read)(struct b43_wldev *dev, char *buf, size_t bufsize);
 	int (*write)(struct b43_wldev *dev, const char *buf, size_t count);
 	struct file_operations fops;
 	/* Offset of struct b43_dfs_file in struct b43_dfsentry */
 	size_t file_struct_offset;
 };

 static inline
 struct b43_dfs_file *fops_to_dfs_file(struct b43_wldev *dev,
 				      const struct b43_debugfs_fops *dfops)
 {
 	void *p;

 	p = dev->dfsentry;
 	p += dfops->file_struct_offset;

 	return p;
 }


 #define fappend(fmt, x...)	\
 	do {							\
 		if (bufsize - count)				\
 			count += snprintf(buf + count,		\
 					  bufsize - count,	\
 					  fmt , ##x);		\
 		else						\
 			printk(KERN_ERR "b43: fappend overflow\n"); \
 	} while (0)


 /* The biggest address values for SHM access from the debugfs files. */
 #define B43_MAX_SHM_ROUTING	4
 #define B43_MAX_SHM_ADDR	0xFFFF

 static ssize_t shm16read__read_file(struct b43_wldev *dev,
 				    char *buf, size_t bufsize)
 {
 	ssize_t count = 0;
 	unsigned int routing, addr;
 	u16 val;

 	routing = dev->dfsentry->shm16read_routing_next;
 	addr = dev->dfsentry->shm16read_addr_next;
 	if ((routing > B43_MAX_SHM_ROUTING) ||
 	    (addr > B43_MAX_SHM_ADDR))
 		return -EDESTADDRREQ;

 	val = b43_shm_read16(dev, routing, addr);
 	fappend("0x%04X\n", val);

 	return count;
 }

 static int shm16read__write_file(struct b43_wldev *dev,
 				 const char *buf, size_t count)
 {
 	unsigned int routing, addr;
 	int res;

 	res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
 	if (res != 2)
 		return -EINVAL;
 	if (routing > B43_MAX_SHM_ROUTING)
 		return -EADDRNOTAVAIL;
 	if (addr > B43_MAX_SHM_ADDR)
 		return -EADDRNOTAVAIL;
 	if (routing == B43_SHM_SHARED) {
 		if ((addr % 2) != 0)
 			return -EADDRNOTAVAIL;
 	}

 	dev->dfsentry->shm16read_routing_next = routing;
 	dev->dfsentry->shm16read_addr_next = addr;

 	return 0;
 }

 static int shm16write__write_file(struct b43_wldev *dev,
 				  const char *buf, size_t count)
 {
 	unsigned int routing, addr, mask, set;
 	u16 val;
 	int res;

 	res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
 		     &routing, &addr, &mask, &set);
 	if (res != 4)
 		return -EINVAL;
 	if (routing > B43_MAX_SHM_ROUTING)
 		return -EADDRNOTAVAIL;
 	if (addr > B43_MAX_SHM_ADDR)
 		return -EADDRNOTAVAIL;
 	if (routing == B43_SHM_SHARED) {
 		if ((addr % 2) != 0)
 			return -EADDRNOTAVAIL;
 	}
 	if ((mask > 0xFFFF) || (set > 0xFFFF))
 		return -E2BIG;

 	if (mask == 0)
 		val = 0;
 	else
 		val = b43_shm_read16(dev, routing, addr);
 	val &= mask;
 	val |= set;
 	b43_shm_write16(dev, routing, addr, val);

 	return 0;
 }

 static ssize_t shm32read__read_file(struct b43_wldev *dev,
 				    char *buf, size_t bufsize)
 {
 	ssize_t count = 0;
 	unsigned int routing, addr;
 	u32 val;

 	routing = dev->dfsentry->shm32read_routing_next;
 	addr = dev->dfsentry->shm32read_addr_next;
 	if ((routing > B43_MAX_SHM_ROUTING) ||
 	    (addr > B43_MAX_SHM_ADDR))
 		return -EDESTADDRREQ;

 	val = b43_shm_read32(dev, routing, addr);
 	fappend("0x%08X\n", val);

 	return count;
 }

 static int shm32read__write_file(struct b43_wldev *dev,
 				 const char *buf, size_t count)
 {
 	unsigned int routing, addr;
 	int res;

 	res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
 	if (res != 2)
 		return -EINVAL;
 	if (routing > B43_MAX_SHM_ROUTING)
 		return -EADDRNOTAVAIL;
 	if (addr > B43_MAX_SHM_ADDR)
 		return -EADDRNOTAVAIL;
 	if (routing == B43_SHM_SHARED) {
 		if ((addr % 2) != 0)
 			return -EADDRNOTAVAIL;
 	}

 	dev->dfsentry->shm32read_routing_next = routing;
 	dev->dfsentry->shm32read_addr_next = addr;

 	return 0;
 }

 static int shm32write__write_file(struct b43_wldev *dev,
 				  const char *buf, size_t count)
 {
 	unsigned int routing, addr, mask, set;
 	u32 val;
 	int res;

 	res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
 		     &routing, &addr, &mask, &set);
 	if (res != 4)
 		return -EINVAL;
 	if (routing > B43_MAX_SHM_ROUTING)
 		return -EADDRNOTAVAIL;
 	if (addr > B43_MAX_SHM_ADDR)
 		return -EADDRNOTAVAIL;
 	if (routing == B43_SHM_SHARED) {
 		if ((addr % 2) != 0)
 			return -EADDRNOTAVAIL;
 	}
 	if ((mask > 0xFFFFFFFF) || (set > 0xFFFFFFFF))
 		return -E2BIG;

 	if (mask == 0)
 		val = 0;
 	else
 		val = b43_shm_read32(dev, routing, addr);
 	val &= mask;
 	val |= set;
 	b43_shm_write32(dev, routing, addr, val);

 	return 0;
 }

 /* The biggest MMIO address that we allow access to from the debugfs files. */
 #define B43_MAX_MMIO_ACCESS	(0xF00 - 1)

 static ssize_t mmio16read__read_file(struct b43_wldev *dev,
 				     char *buf, size_t bufsize)
 {
 	ssize_t count = 0;
 	unsigned int addr;
 	u16 val;

 	addr = dev->dfsentry->mmio16read_next;
 	if (addr > B43_MAX_MMIO_ACCESS)
 		return -EDESTADDRREQ;

 	val = b43_read16(dev, addr);
 	fappend("0x%04X\n", val);

 	return count;
 }

 static int mmio16read__write_file(struct b43_wldev *dev,
 				  const char *buf, size_t count)
 {
 	unsigned int addr;
 	int res;

 	res = sscanf(buf, "0x%X", &addr);
 	if (res != 1)
 		return -EINVAL;
 	if (addr > B43_MAX_MMIO_ACCESS)
 		return -EADDRNOTAVAIL;
 	if ((addr % 2) != 0)
 		return -EINVAL;

 	dev->dfsentry->mmio16read_next = addr;

 	return 0;
 }

 static int mmio16write__write_file(struct b43_wldev *dev,
 				   const char *buf, size_t count)
 {
 	unsigned int addr, mask, set;
 	int res;
 	u16 val;

 	res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set);
 	if (res != 3)
 		return -EINVAL;
 	if (addr > B43_MAX_MMIO_ACCESS)
 		return -EADDRNOTAVAIL;
 	if ((mask > 0xFFFF) || (set > 0xFFFF))
 		return -E2BIG;
 	if ((addr % 2) != 0)
 		return -EINVAL;

 	if (mask == 0)
 		val = 0;
 	else
 		val = b43_read16(dev, addr);
 	val &= mask;
 	val |= set;
 	b43_write16(dev, addr, val);

 	return 0;
 }

 static ssize_t mmio32read__read_file(struct b43_wldev *dev,
 				     char *buf, size_t bufsize)
 {
 	ssize_t count = 0;
 	unsigned int addr;
 	u32 val;

 	addr = dev->dfsentry->mmio32read_next;
 	if (addr > B43_MAX_MMIO_ACCESS)
 		return -EDESTADDRREQ;

 	val = b43_read32(dev, addr);
 	fappend("0x%08X\n", val);

 	return count;
 }

 static int mmio32read__write_file(struct b43_wldev *dev,
 				  const char *buf, size_t count)
 {
 	unsigned int addr;
 	int res;

 	res = sscanf(buf, "0x%X", &addr);
 	if (res != 1)
 		return -EINVAL;
 	if (addr > B43_MAX_MMIO_ACCESS)
 		return -EADDRNOTAVAIL;
 	if ((addr % 4) != 0)
 		return -EINVAL;

 	dev->dfsentry->mmio32read_next = addr;

 	return 0;
 }

 static int mmio32write__write_file(struct b43_wldev *dev,
 				   const char *buf, size_t count)
 {
 	unsigned int addr, mask, set;
 	int res;
 	u32 val;

 	res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set);
 	if (res != 3)
 		return -EINVAL;
 	if (addr > B43_MAX_MMIO_ACCESS)
 		return -EADDRNOTAVAIL;
 	if ((mask > 0xFFFFFFFF) || (set > 0xFFFFFFFF))
 		return -E2BIG;
 	if ((addr % 4) != 0)
 		return -EINVAL;

 	if (mask == 0)
 		val = 0;
 	else
 		val = b43_read32(dev, addr);
 	val &= mask;
 	val |= set;
 	b43_write32(dev, addr, val);

 	return 0;
 }

 static ssize_t txstat_read_file(struct b43_wldev *dev,
 				char *buf, size_t bufsize)
 {
 	struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
 	ssize_t count = 0;
 	int i, idx;
 	struct b43_txstatus *stat;

 	if (log->end < 0) {
 		fappend("Nothing transmitted, yet\n");
 		goto out;
 	}
 	fappend("b43 TX status reports:\n\n"
 		"index | cookie | seq | phy_stat | frame_count | "
 		"rts_count | supp_reason | pm_indicated | "
 		"intermediate | for_ampdu | acked\n" "---\n");
 	i = log->end + 1;
 	idx = 0;
 	while (1) {
 		if (i == B43_NR_LOGGED_TXSTATUS)
 			i = 0;
 		stat = &(log->log[i]);
 		if (stat->cookie) {
 			fappend("%03d | "
 				"0x%04X | 0x%04X | 0x%02X | "
 				"0x%X | 0x%X | "
 				"%u | %u | "
 				"%u | %u | %u\n",
 				idx,
 				stat->cookie, stat->seq, stat->phy_stat,
 				stat->frame_count, stat->rts_count,
 				stat->supp_reason, stat->pm_indicated,
 				stat->intermediate, stat->for_ampdu,
 				stat->acked);
 			idx++;
 		}
 		if (i == log->end)
 			break;
 		i++;
 	}
 out:

 	return count;
 }

 static int restart_write_file(struct b43_wldev *dev,
 			      const char *buf, size_t count)
 {
 	int err = 0;

 	if (count > 0 && buf[0] == '1') {
 		b43_controller_restart(dev, "manually restarted");
 	} else
 		err = -EINVAL;

 	return err;
 }

 static unsigned long calc_expire_secs(unsigned long now,
 				      unsigned long time,
 				      unsigned long expire)
 {
 	expire = time + expire;

 	if (time_after(now, expire))
 		return 0; /* expired */
 	if (expire < now) {
 		/* jiffies wrapped */
 		expire -= MAX_JIFFY_OFFSET;
 		now -= MAX_JIFFY_OFFSET;
 	}
 	B43_WARN_ON(expire < now);

 	return (expire - now) / HZ;
 }

 static ssize_t loctls_read_file(struct b43_wldev *dev,
 				char *buf, size_t bufsize)
 {
 	ssize_t count = 0;
 	struct b43_txpower_lo_control *lo;
 	int i, err = 0;
 	struct b43_lo_calib *cal;
 	unsigned long now = jiffies;
 	struct b43_phy *phy = &dev->phy;

 	if (phy->type != B43_PHYTYPE_G) {
 		fappend("Device is not a G-PHY\n");
 		err = -ENODEV;
 		goto out;
 	}
 	lo = phy->g->lo_control;
 	fappend("-- Local Oscillator calibration data --\n\n");
 	fappend("HW-power-control enabled: %d\n",
 		dev->phy.hardware_power_control);
 	fappend("TX Bias: 0x%02X,  TX Magn: 0x%02X  (expire in %lu sec)\n",
 		lo->tx_bias, lo->tx_magn,
 		calc_expire_secs(now, lo->txctl_measured_time,
 				 B43_LO_TXCTL_EXPIRE));
 	fappend("Power Vector: 0x%08X%08X  (expires in %lu sec)\n",
 		(unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
 		(unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL),
 		calc_expire_secs(now, lo->pwr_vec_read_time,
 				 B43_LO_PWRVEC_EXPIRE));

 	fappend("\nCalibrated settings:\n");
 	list_for_each_entry(cal, &lo->calib_list, list) {
 		bool active;

 		active = (b43_compare_bbatt(&cal->bbatt, &phy->g->bbatt) &&
 			  b43_compare_rfatt(&cal->rfatt, &phy->g->rfatt));
 		fappend("BB(%d), RF(%d,%d)  ->  I=%d, Q=%d  "
 			"(expires in %lu sec)%s\n",
 			cal->bbatt.att,
 			cal->rfatt.att, cal->rfatt.with_padmix,
 			cal->ctl.i, cal->ctl.q,
 			calc_expire_secs(now, cal->calib_time,
 					 B43_LO_CALIB_EXPIRE),
 			active ? "  ACTIVE" : "");
 	}

 	fappend("\nUsed RF attenuation values:  Value(WithPadmix flag)\n");
 	for (i = 0; i < lo->rfatt_list.len; i++) {
 		fappend("%u(%d), ",
 			lo->rfatt_list.list[i].att,
 			lo->rfatt_list.list[i].with_padmix);
 	}
 	fappend("\n");
 	fappend("\nUsed Baseband attenuation values:\n");
 	for (i = 0; i < lo->bbatt_list.len; i++) {
 		fappend("%u, ",
 			lo->bbatt_list.list[i].att);
 	}
 	fappend("\n");

 out:
 	return err ? err : count;
 }

 #undef fappend

 static int b43_debugfs_open(struct inode *inode, struct file *file)
 {
 	file->private_data = inode->i_private;
 	return 0;
 }

 static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf,
 				size_t count, loff_t *ppos)
 {
 	struct b43_wldev *dev;
 	struct b43_debugfs_fops *dfops;
 	struct b43_dfs_file *dfile;
 	ssize_t uninitialized_var(ret);
 	char *buf;
 	const size_t bufsize = 1024 * 16; /* 16 kiB buffer */
 	const size_t buforder = get_order(bufsize);
 	int err = 0;

 	if (!count)
 		return 0;
 	dev = file->private_data;
 	if (!dev)
 		return -ENODEV;

 	mutex_lock(&dev->wl->mutex);
 	if (b43_status(dev) < B43_STAT_INITIALIZED) {
 		err = -ENODEV;
 		goto out_unlock;
 	}

 	dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 	if (!dfops->read) {
 		err = -ENOSYS;
 		goto out_unlock;
 	}
 	dfile = fops_to_dfs_file(dev, dfops);

 	if (!dfile->buffer) {
 		buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
 		if (!buf) {
 			err = -ENOMEM;
 			goto out_unlock;
 		}
 		memset(buf, 0, bufsize);
 		ret = dfops->read(dev, buf, bufsize);
 		if (ret <= 0) {
 			free_pages((unsigned long)buf, buforder);
 			err = ret;
 			goto out_unlock;
 		}
 		dfile->data_len = ret;
 		dfile->buffer = buf;
 	}

 	ret = simple_read_from_buffer(userbuf, count, ppos,
 				      dfile->buffer,
 				      dfile->data_len);
 	if (*ppos >= dfile->data_len) {
 		free_pages((unsigned long)dfile->buffer, buforder);
 		dfile->buffer = NULL;
 		dfile->data_len = 0;
 	}
 out_unlock:
 	mutex_unlock(&dev->wl->mutex);

 	return err ? err : ret;
 }

 static ssize_t b43_debugfs_write(struct file *file,
 				 const char __user *userbuf,
 				 size_t count, loff_t *ppos)
 {
 	struct b43_wldev *dev;
 	struct b43_debugfs_fops *dfops;
 	char *buf;
 	int err = 0;

 	if (!count)
 		return 0;
 	if (count > PAGE_SIZE)
 		return -E2BIG;
 	dev = file->private_data;
 	if (!dev)
 		return -ENODEV;

 	mutex_lock(&dev->wl->mutex);
 	if (b43_status(dev) < B43_STAT_INITIALIZED) {
 		err = -ENODEV;
 		goto out_unlock;
 	}

 	dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
 	if (!dfops->write) {
 		err = -ENOSYS;
 		goto out_unlock;
 	}

 	buf = (char *)get_zeroed_page(GFP_KERNEL);
 	if (!buf) {
 		err = -ENOMEM;
 		goto out_unlock;
 	}
 	if (copy_from_user(buf, userbuf, count)) {
 		err = -EFAULT;
 		goto out_freepage;
 	}
 	err = dfops->write(dev, buf, count);
 	if (err)
 		goto out_freepage;

 out_freepage:
 	free_page((unsigned long)buf);
 out_unlock:
 	mutex_unlock(&dev->wl->mutex);

 	return err ? err : count;
 }


 #define B43_DEBUGFS_FOPS(name, _read, _write)			\
 	static struct b43_debugfs_fops fops_##name = {		\
 		.read	= _read,				\
 		.write	= _write,				\
 		.fops	= {					\
 			.open	= b43_debugfs_open,		\
 			.read	= b43_debugfs_read,		\
 			.write	= b43_debugfs_write,		\
 		},						\
 		.file_struct_offset = offsetof(struct b43_dfsentry, \
 					       file_##name),	\
 	}

 B43_DEBUGFS_FOPS(shm16read, shm16read__read_file, shm16read__write_file);
 B43_DEBUGFS_FOPS(shm16write, NULL, shm16write__write_file);
 B43_DEBUGFS_FOPS(shm32read, shm32read__read_file, shm32read__write_file);
 B43_DEBUGFS_FOPS(shm32write, NULL, shm32write__write_file);
 B43_DEBUGFS_FOPS(mmio16read, mmio16read__read_file, mmio16read__write_file);
 B43_DEBUGFS_FOPS(mmio16write, NULL, mmio16write__write_file);
 B43_DEBUGFS_FOPS(mmio32read, mmio32read__read_file, mmio32read__write_file);
 B43_DEBUGFS_FOPS(mmio32write, NULL, mmio32write__write_file);
 B43_DEBUGFS_FOPS(txstat, txstat_read_file, NULL);
 B43_DEBUGFS_FOPS(restart, NULL, restart_write_file);
 B43_DEBUGFS_FOPS(loctls, loctls_read_file, NULL);


 bool b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature)
 {
 	bool enabled;

 	enabled = (dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
 	if (unlikely(enabled)) {
 		/* Force full debugging messages, if the user enabled
 		 * some dynamic debugging feature. */
 		b43_modparam_verbose = B43_VERBOSITY_MAX;
 	}

 	return enabled;
 }

 static void b43_remove_dynamic_debug(struct b43_wldev *dev)
 {
 	struct b43_dfsentry *e = dev->dfsentry;
 	int i;

 	for (i = 0; i < __B43_NR_DYNDBG; i++)
 		debugfs_remove(e->dyn_debug_dentries[i]);
 }

 static void b43_add_dynamic_debug(struct b43_wldev *dev)
 {
 	struct b43_dfsentry *e = dev->dfsentry;
 	struct dentry *d;

 #define add_dyn_dbg(name, id, initstate) do {		\
 	e->dyn_debug[id] = (initstate);			\
 	d = debugfs_create_bool(name, 0600, e->subdir,	\
 				&(e->dyn_debug[id]));	\
 	if (!IS_ERR(d))					\
 		e->dyn_debug_dentries[id] = d;		\
 				} while (0)

 	add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
 	add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
 	add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
 	add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
 	add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);
 	add_dyn_dbg("debug_lo", B43_DBG_LO, 0);
 	add_dyn_dbg("debug_firmware", B43_DBG_FIRMWARE, 0);
 	add_dyn_dbg("debug_keys", B43_DBG_KEYS, 0);
 	add_dyn_dbg("debug_verbose_stats", B43_DBG_VERBOSESTATS, 0);

 #undef add_dyn_dbg
 }

 void b43_debugfs_add_device(struct b43_wldev *dev)
 {
 	struct b43_dfsentry *e;
 	struct b43_txstatus_log *log;
 	char devdir[16];

 	B43_WARN_ON(!dev);
 	e = kzalloc(sizeof(*e), GFP_KERNEL);
 	if (!e) {
 		b43err(dev->wl, "debugfs: add device OOM\n");
 		return;
 	}
 	e->dev = dev;
 	log = &e->txstatlog;
 	log->log = kcalloc(B43_NR_LOGGED_TXSTATUS,
 			   sizeof(struct b43_txstatus), GFP_KERNEL);
 	if (!log->log) {
 		b43err(dev->wl, "debugfs: add device txstatus OOM\n");
 		kfree(e);
 		return;
 	}
 	log->end = -1;

 	dev->dfsentry = e;

 	snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
 	e->subdir = debugfs_create_dir(devdir, rootdir);
 	if (!e->subdir || IS_ERR(e->subdir)) {
 		if (e->subdir == ERR_PTR(-ENODEV)) {
 			b43dbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
 			       "enabled in kernel config\n");
 		} else {
 			b43err(dev->wl, "debugfs: cannot create %s directory\n",
 			       devdir);
 		}
 		dev->dfsentry = NULL;
 		kfree(log->log);
 		kfree(e);
 		return;
 	}

 	e->mmio16read_next = 0xFFFF; /* invalid address */
 	e->mmio32read_next = 0xFFFF; /* invalid address */
 	e->shm16read_routing_next = 0xFFFFFFFF; /* invalid routing */
 	e->shm16read_addr_next = 0xFFFFFFFF; /* invalid address */
 	e->shm32read_routing_next = 0xFFFFFFFF; /* invalid routing */
 	e->shm32read_addr_next = 0xFFFFFFFF; /* invalid address */

 #define ADD_FILE(name, mode)	\
 	do {							\
 		struct dentry *d;				\
 		d = debugfs_create_file(__stringify(name),	\
 					mode, e->subdir, dev,	\
 					&fops_##name.fops);	\
 		e->file_##name.dentry = NULL;			\
 		if (!IS_ERR(d))					\
 			e->file_##name.dentry = d;		\
 	} while (0)


 	ADD_FILE(shm16read, 0600);
 	ADD_FILE(shm16write, 0200);
 	ADD_FILE(shm32read, 0600);
 	ADD_FILE(shm32write, 0200);
 	ADD_FILE(mmio16read, 0600);
 	ADD_FILE(mmio16write, 0200);
 	ADD_FILE(mmio32read, 0600);
 	ADD_FILE(mmio32write, 0200);
 	ADD_FILE(txstat, 0400);
 	ADD_FILE(restart, 0200);
 	ADD_FILE(loctls, 0400);

 #undef ADD_FILE

 	b43_add_dynamic_debug(dev);
 }

 void b43_debugfs_remove_device(struct b43_wldev *dev)
 {
 	struct b43_dfsentry *e;

 	if (!dev)
 		return;
 	e = dev->dfsentry;
 	if (!e)
 		return;
 	b43_remove_dynamic_debug(dev);

 	debugfs_remove(e->file_shm16read.dentry);
 	debugfs_remove(e->file_shm16write.dentry);
 	debugfs_remove(e->file_shm32read.dentry);
 	debugfs_remove(e->file_shm32write.dentry);
 	debugfs_remove(e->file_mmio16read.dentry);
 	debugfs_remove(e->file_mmio16write.dentry);
 	debugfs_remove(e->file_mmio32read.dentry);
 	debugfs_remove(e->file_mmio32write.dentry);
 	debugfs_remove(e->file_txstat.dentry);
 	debugfs_remove(e->file_restart.dentry);
 	debugfs_remove(e->file_loctls.dentry);

 	debugfs_remove(e->subdir);
 	kfree(e->txstatlog.log);
 	kfree(e);
 }

 void b43_debugfs_log_txstat(struct b43_wldev *dev,
 			    const struct b43_txstatus *status)
 {
 	struct b43_dfsentry *e = dev->dfsentry;
 	struct b43_txstatus_log *log;
 	struct b43_txstatus *cur;
 	int i;

 	if (!e)
 		return;
 	log = &e->txstatlog;
 	i = log->end + 1;
 	if (i == B43_NR_LOGGED_TXSTATUS)
 		i = 0;
 	log->end = i;
 	cur = &(log->log[i]);
 	memcpy(cur, status, sizeof(*cur));
 }

 void b43_debugfs_init(void)
 {
 	rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 	if (IS_ERR(rootdir))
 		rootdir = NULL;
 }

 void b43_debugfs_exit(void)
 {
 	debugfs_remove(rootdir);
 }
	/*

	Broadcom B43 wireless driver

	debugfs driver debugging code

	Copyright (c) 2005-2007 Michael Buesch <mb@bu3sch.de>

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	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; see the file COPYING. If not, write to
	the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
	Boston, MA 02110-1301, USA.

	*/

	#include <linux/fs.h>
	#include <linux/debugfs.h>
	#include <linux/slab.h>
	#include <linux/netdevice.h>
	#include <linux/pci.h>
	#include <linux/mutex.h>

	#include "b43.h"
	#include "main.h"
	#include "debugfs.h"
	#include "dma.h"
	#include "xmit.h"


	/* The root directory. */
	static struct dentry *rootdir;

	struct b43_debugfs_fops {
	ssize_t (read)(struct b43_wldev dev, char *buf, size_t bufsize);
	int (write)(struct b43_wldev dev, const char *buf, size_t count);
	struct file_operations fops;
	/* Offset of struct b43_dfs_file in struct b43_dfsentry */
	size_t file_struct_offset;
	};

	static inline
	struct b43_dfs_file fops_to_dfs_file(struct b43_wldev dev,
	const struct b43_debugfs_fops *dfops)
	{
	void *p;

	p = dev->dfsentry;
	p += dfops->file_struct_offset;

	return p;
	}


	#define fappend(fmt, x...) \
	do { \
	if (bufsize - count) \
	count += snprintf(buf + count, \
	bufsize - count, \
	fmt , ##x); \
	else \
	printk(KERN_ERR "b43: fappend overflow\n"); \
	} while (0)


	/* The biggest address values for SHM access from the debugfs files. */
	#define B43_MAX_SHM_ROUTING 4
	#define B43_MAX_SHM_ADDR 0xFFFF

	static ssize_t shm16read__read_file(struct b43_wldev *dev,
	char *buf, size_t bufsize)
	{
	ssize_t count = 0;
	unsigned int routing, addr;
	u16 val;

	routing = dev->dfsentry->shm16read_routing_next;
	addr = dev->dfsentry->shm16read_addr_next;
	if ((routing > B43_MAX_SHM_ROUTING) \|\|
	(addr > B43_MAX_SHM_ADDR))
	return -EDESTADDRREQ;

	val = b43_shm_read16(dev, routing, addr);
	fappend("0x%04X\n", val);

	return count;
	}

	static int shm16read__write_file(struct b43_wldev *dev,
	const char *buf, size_t count)
	{
	unsigned int routing, addr;
	int res;

	res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
	if (res != 2)
	return -EINVAL;
	if (routing > B43_MAX_SHM_ROUTING)
	return -EADDRNOTAVAIL;
	if (addr > B43_MAX_SHM_ADDR)
	return -EADDRNOTAVAIL;
	if (routing == B43_SHM_SHARED) {
	if ((addr % 2) != 0)
	return -EADDRNOTAVAIL;
	}

	dev->dfsentry->shm16read_routing_next = routing;
	dev->dfsentry->shm16read_addr_next = addr;

	return 0;
	}

	static int shm16write__write_file(struct b43_wldev *dev,
	const char *buf, size_t count)
	{
	unsigned int routing, addr, mask, set;
	u16 val;
	int res;

	res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
	&routing, &addr, &mask, &set);
	if (res != 4)
	return -EINVAL;
	if (routing > B43_MAX_SHM_ROUTING)
	return -EADDRNOTAVAIL;
	if (addr > B43_MAX_SHM_ADDR)
	return -EADDRNOTAVAIL;
	if (routing == B43_SHM_SHARED) {
	if ((addr % 2) != 0)
	return -EADDRNOTAVAIL;
	}
	if ((mask > 0xFFFF) \|\| (set > 0xFFFF))
	return -E2BIG;

	if (mask == 0)
	val = 0;
	else
	val = b43_shm_read16(dev, routing, addr);
	val &= mask;
	val \|= set;
	b43_shm_write16(dev, routing, addr, val);

	return 0;
	}

	static ssize_t shm32read__read_file(struct b43_wldev *dev,
	char *buf, size_t bufsize)
	{
	ssize_t count = 0;
	unsigned int routing, addr;
	u32 val;

	routing = dev->dfsentry->shm32read_routing_next;
	addr = dev->dfsentry->shm32read_addr_next;
	if ((routing > B43_MAX_SHM_ROUTING) \|\|
	(addr > B43_MAX_SHM_ADDR))
	return -EDESTADDRREQ;

	val = b43_shm_read32(dev, routing, addr);
	fappend("0x%08X\n", val);

	return count;
	}

	static int shm32read__write_file(struct b43_wldev *dev,
	const char *buf, size_t count)
	{
	unsigned int routing, addr;
	int res;

	res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
	if (res != 2)
	return -EINVAL;
	if (routing > B43_MAX_SHM_ROUTING)
	return -EADDRNOTAVAIL;
	if (addr > B43_MAX_SHM_ADDR)
	return -EADDRNOTAVAIL;
	if (routing == B43_SHM_SHARED) {
	if ((addr % 2) != 0)
	return -EADDRNOTAVAIL;
	}

	dev->dfsentry->shm32read_routing_next = routing;
	dev->dfsentry->shm32read_addr_next = addr;

	return 0;
	}

	static int shm32write__write_file(struct b43_wldev *dev,
	const char *buf, size_t count)
	{
	unsigned int routing, addr, mask, set;
	u32 val;
	int res;

	res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
	&routing, &addr, &mask, &set);
	if (res != 4)
	return -EINVAL;
	if (routing > B43_MAX_SHM_ROUTING)
	return -EADDRNOTAVAIL;
	if (addr > B43_MAX_SHM_ADDR)
	return -EADDRNOTAVAIL;
	if (routing == B43_SHM_SHARED) {
	if ((addr % 2) != 0)
	return -EADDRNOTAVAIL;
	}
	if ((mask > 0xFFFFFFFF) \|\| (set > 0xFFFFFFFF))
	return -E2BIG;

	if (mask == 0)
	val = 0;
	else
	val = b43_shm_read32(dev, routing, addr);
	val &= mask;
	val \|= set;
	b43_shm_write32(dev, routing, addr, val);

	return 0;
	}

	/* The biggest MMIO address that we allow access to from the debugfs files. */
	#define B43_MAX_MMIO_ACCESS (0xF00 - 1)

	static ssize_t mmio16read__read_file(struct b43_wldev *dev,
	char *buf, size_t bufsize)
	{
	ssize_t count = 0;
	unsigned int addr;
	u16 val;

	addr = dev->dfsentry->mmio16read_next;
	if (addr > B43_MAX_MMIO_ACCESS)
	return -EDESTADDRREQ;

	val = b43_read16(dev, addr);
	fappend("0x%04X\n", val);

	return count;
	}

	static int mmio16read__write_file(struct b43_wldev *dev,
	const char *buf, size_t count)
	{
	unsigned int addr;
	int res;

	res = sscanf(buf, "0x%X", &addr);
	if (res != 1)
	return -EINVAL;
	if (addr > B43_MAX_MMIO_ACCESS)
	return -EADDRNOTAVAIL;
	if ((addr % 2) != 0)
	return -EINVAL;

	dev->dfsentry->mmio16read_next = addr;

	return 0;
	}

	static int mmio16write__write_file(struct b43_wldev *dev,
	const char *buf, size_t count)
	{
	unsigned int addr, mask, set;
	int res;
	u16 val;

	res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set);
	if (res != 3)
	return -EINVAL;
	if (addr > B43_MAX_MMIO_ACCESS)
	return -EADDRNOTAVAIL;
	if ((mask > 0xFFFF) \|\| (set > 0xFFFF))
	return -E2BIG;
	if ((addr % 2) != 0)
	return -EINVAL;

	if (mask == 0)
	val = 0;
	else
	val = b43_read16(dev, addr);
	val &= mask;
	val \|= set;
	b43_write16(dev, addr, val);

	return 0;
	}

	static ssize_t mmio32read__read_file(struct b43_wldev *dev,
	char *buf, size_t bufsize)
	{
	ssize_t count = 0;
	unsigned int addr;
	u32 val;

	addr = dev->dfsentry->mmio32read_next;
	if (addr > B43_MAX_MMIO_ACCESS)
	return -EDESTADDRREQ;

	val = b43_read32(dev, addr);
	fappend("0x%08X\n", val);

	return count;
	}

	static int mmio32read__write_file(struct b43_wldev *dev,
	const char *buf, size_t count)
	{
	unsigned int addr;
	int res;

	res = sscanf(buf, "0x%X", &addr);
	if (res != 1)
	return -EINVAL;
	if (addr > B43_MAX_MMIO_ACCESS)
	return -EADDRNOTAVAIL;
	if ((addr % 4) != 0)
	return -EINVAL;

	dev->dfsentry->mmio32read_next = addr;

	return 0;
	}

	static int mmio32write__write_file(struct b43_wldev *dev,
	const char *buf, size_t count)
	{
	unsigned int addr, mask, set;
	int res;
	u32 val;

	res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set);
	if (res != 3)
	return -EINVAL;
	if (addr > B43_MAX_MMIO_ACCESS)
	return -EADDRNOTAVAIL;
	if ((mask > 0xFFFFFFFF) \|\| (set > 0xFFFFFFFF))
	return -E2BIG;
	if ((addr % 4) != 0)
	return -EINVAL;

	if (mask == 0)
	val = 0;
	else
	val = b43_read32(dev, addr);
	val &= mask;
	val \|= set;
	b43_write32(dev, addr, val);

	return 0;
	}

	static ssize_t txstat_read_file(struct b43_wldev *dev,
	char *buf, size_t bufsize)
	{
	struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
	ssize_t count = 0;
	int i, idx;
	struct b43_txstatus *stat;

	if (log->end < 0) {
	fappend("Nothing transmitted, yet\n");
	goto out;
	}
	fappend("b43 TX status reports:\n\n"
	"index \| cookie \| seq \| phy_stat \| frame_count \| "
	"rts_count \| supp_reason \| pm_indicated \| "
	"intermediate \| for_ampdu \| acked\n" "---\n");
	i = log->end + 1;
	idx = 0;
	while (1) {
	if (i == B43_NR_LOGGED_TXSTATUS)
	i = 0;
	stat = &(log->log[i]);
	if (stat->cookie) {
	fappend("%03d \| "
	"0x%04X \| 0x%04X \| 0x%02X \| "
	"0x%X \| 0x%X \| "
	"%u \| %u \| "
	"%u \| %u \| %u\n",
	idx,
	stat->cookie, stat->seq, stat->phy_stat,
	stat->frame_count, stat->rts_count,
	stat->supp_reason, stat->pm_indicated,
	stat->intermediate, stat->for_ampdu,
	stat->acked);
	idx++;
	}
	if (i == log->end)
	break;
	i++;
	}
	out:

	return count;
	}

	static int restart_write_file(struct b43_wldev *dev,
	const char *buf, size_t count)
	{
	int err = 0;

	if (count > 0 && buf[0] == '1') {
	b43_controller_restart(dev, "manually restarted");
	} else
	err = -EINVAL;

	return err;
	}

	static unsigned long calc_expire_secs(unsigned long now,
	unsigned long time,
	unsigned long expire)
	{
	expire = time + expire;

	if (time_after(now, expire))
	return 0; /* expired */
	if (expire < now) {
	/* jiffies wrapped */
	expire -= MAX_JIFFY_OFFSET;
	now -= MAX_JIFFY_OFFSET;
	}
	B43_WARN_ON(expire < now);

	return (expire - now) / HZ;
	}

	static ssize_t loctls_read_file(struct b43_wldev *dev,
	char *buf, size_t bufsize)
	{
	ssize_t count = 0;
	struct b43_txpower_lo_control *lo;
	int i, err = 0;
	struct b43_lo_calib *cal;
	unsigned long now = jiffies;
	struct b43_phy *phy = &dev->phy;

	if (phy->type != B43_PHYTYPE_G) {
	fappend("Device is not a G-PHY\n");
	err = -ENODEV;
	goto out;
	}
	lo = phy->g->lo_control;
	fappend("-- Local Oscillator calibration data --\n\n");
	fappend("HW-power-control enabled: %d\n",
	dev->phy.hardware_power_control);
	fappend("TX Bias: 0x%02X, TX Magn: 0x%02X (expire in %lu sec)\n",
	lo->tx_bias, lo->tx_magn,
	calc_expire_secs(now, lo->txctl_measured_time,
	B43_LO_TXCTL_EXPIRE));
	fappend("Power Vector: 0x%08X%08X (expires in %lu sec)\n",
	(unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
	(unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL),
	calc_expire_secs(now, lo->pwr_vec_read_time,
	B43_LO_PWRVEC_EXPIRE));

	fappend("\nCalibrated settings:\n");
	list_for_each_entry(cal, &lo->calib_list, list) {
	bool active;

	active = (b43_compare_bbatt(&cal->bbatt, &phy->g->bbatt) &&
	b43_compare_rfatt(&cal->rfatt, &phy->g->rfatt));
	fappend("BB(%d), RF(%d,%d) -> I=%d, Q=%d "
	"(expires in %lu sec)%s\n",
	cal->bbatt.att,
	cal->rfatt.att, cal->rfatt.with_padmix,
	cal->ctl.i, cal->ctl.q,
	calc_expire_secs(now, cal->calib_time,
	B43_LO_CALIB_EXPIRE),
	active ? " ACTIVE" : "");
	}

	fappend("\nUsed RF attenuation values: Value(WithPadmix flag)\n");
	for (i = 0; i < lo->rfatt_list.len; i++) {
	fappend("%u(%d), ",
	lo->rfatt_list.list[i].att,
	lo->rfatt_list.list[i].with_padmix);
	}
	fappend("\n");
	fappend("\nUsed Baseband attenuation values:\n");
	for (i = 0; i < lo->bbatt_list.len; i++) {
	fappend("%u, ",
	lo->bbatt_list.list[i].att);
	}
	fappend("\n");

	out:
	return err ? err : count;
	}

	#undef fappend

	static int b43_debugfs_open(struct inode inode, struct file file)
	{
	file->private_data = inode->i_private;
	return 0;
	}

	static ssize_t b43_debugfs_read(struct file file, char __user userbuf,
	size_t count, loff_t *ppos)
	{
	struct b43_wldev *dev;
	struct b43_debugfs_fops *dfops;
	struct b43_dfs_file *dfile;
	ssize_t uninitialized_var(ret);
	char *buf;
	const size_t bufsize = 1024 * 16; /* 16 kiB buffer */
	const size_t buforder = get_order(bufsize);
	int err = 0;

	if (!count)
	return 0;
	dev = file->private_data;
	if (!dev)
	return -ENODEV;

	mutex_lock(&dev->wl->mutex);
	if (b43_status(dev) < B43_STAT_INITIALIZED) {
	err = -ENODEV;
	goto out_unlock;
	}

	dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
	if (!dfops->read) {
	err = -ENOSYS;
	goto out_unlock;
	}
	dfile = fops_to_dfs_file(dev, dfops);

	if (!dfile->buffer) {
	buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
	if (!buf) {
	err = -ENOMEM;
	goto out_unlock;
	}
	memset(buf, 0, bufsize);
	ret = dfops->read(dev, buf, bufsize);
	if (ret <= 0) {
	free_pages((unsigned long)buf, buforder);
	err = ret;
	goto out_unlock;
	}
	dfile->data_len = ret;
	dfile->buffer = buf;
	}

	ret = simple_read_from_buffer(userbuf, count, ppos,
	dfile->buffer,
	dfile->data_len);
	if (*ppos >= dfile->data_len) {
	free_pages((unsigned long)dfile->buffer, buforder);
	dfile->buffer = NULL;
	dfile->data_len = 0;
	}
	out_unlock:
	mutex_unlock(&dev->wl->mutex);

	return err ? err : ret;
	}

	static ssize_t b43_debugfs_write(struct file *file,
	const char __user *userbuf,
	size_t count, loff_t *ppos)
	{
	struct b43_wldev *dev;
	struct b43_debugfs_fops *dfops;
	char *buf;
	int err = 0;

	if (!count)
	return 0;
	if (count > PAGE_SIZE)
	return -E2BIG;
	dev = file->private_data;
	if (!dev)
	return -ENODEV;

	mutex_lock(&dev->wl->mutex);
	if (b43_status(dev) < B43_STAT_INITIALIZED) {
	err = -ENODEV;
	goto out_unlock;
	}

	dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
	if (!dfops->write) {
	err = -ENOSYS;
	goto out_unlock;
	}

	buf = (char *)get_zeroed_page(GFP_KERNEL);
	if (!buf) {
	err = -ENOMEM;
	goto out_unlock;
	}
	if (copy_from_user(buf, userbuf, count)) {
	err = -EFAULT;
	goto out_freepage;
	}
	err = dfops->write(dev, buf, count);
	if (err)
	goto out_freepage;

	out_freepage:
	free_page((unsigned long)buf);
	out_unlock:
	mutex_unlock(&dev->wl->mutex);

	return err ? err : count;
	}


	#define B43_DEBUGFS_FOPS(name, _read, _write) \
	static struct b43_debugfs_fops fops_##name = { \
	.read = _read, \
	.write = _write, \
	.fops = { \
	.open = b43_debugfs_open, \
	.read = b43_debugfs_read, \
	.write = b43_debugfs_write, \
	}, \
	.file_struct_offset = offsetof(struct b43_dfsentry, \
	file_##name), \
	}

	B43_DEBUGFS_FOPS(shm16read, shm16read__read_file, shm16read__write_file);
	B43_DEBUGFS_FOPS(shm16write, NULL, shm16write__write_file);
	B43_DEBUGFS_FOPS(shm32read, shm32read__read_file, shm32read__write_file);
	B43_DEBUGFS_FOPS(shm32write, NULL, shm32write__write_file);
	B43_DEBUGFS_FOPS(mmio16read, mmio16read__read_file, mmio16read__write_file);
	B43_DEBUGFS_FOPS(mmio16write, NULL, mmio16write__write_file);
	B43_DEBUGFS_FOPS(mmio32read, mmio32read__read_file, mmio32read__write_file);
	B43_DEBUGFS_FOPS(mmio32write, NULL, mmio32write__write_file);
	B43_DEBUGFS_FOPS(txstat, txstat_read_file, NULL);
	B43_DEBUGFS_FOPS(restart, NULL, restart_write_file);
	B43_DEBUGFS_FOPS(loctls, loctls_read_file, NULL);


	bool b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature)
	{
	bool enabled;

	enabled = (dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
	if (unlikely(enabled)) {
	/* Force full debugging messages, if the user enabled
	* some dynamic debugging feature. */
	b43_modparam_verbose = B43_VERBOSITY_MAX;
	}

	return enabled;
	}

	static void b43_remove_dynamic_debug(struct b43_wldev *dev)
	{
	struct b43_dfsentry *e = dev->dfsentry;
	int i;

	for (i = 0; i < __B43_NR_DYNDBG; i++)
	debugfs_remove(e->dyn_debug_dentries[i]);
	}

	static void b43_add_dynamic_debug(struct b43_wldev *dev)
	{
	struct b43_dfsentry *e = dev->dfsentry;
	struct dentry *d;

	#define add_dyn_dbg(name, id, initstate) do { \
	e->dyn_debug[id] = (initstate); \
	d = debugfs_create_bool(name, 0600, e->subdir, \
	&(e->dyn_debug[id])); \
	if (!IS_ERR(d)) \
	e->dyn_debug_dentries[id] = d; \
	} while (0)

	add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
	add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
	add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
	add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
	add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);
	add_dyn_dbg("debug_lo", B43_DBG_LO, 0);
	add_dyn_dbg("debug_firmware", B43_DBG_FIRMWARE, 0);
	add_dyn_dbg("debug_keys", B43_DBG_KEYS, 0);
	add_dyn_dbg("debug_verbose_stats", B43_DBG_VERBOSESTATS, 0);

	#undef add_dyn_dbg
	}

	void b43_debugfs_add_device(struct b43_wldev *dev)
	{
	struct b43_dfsentry *e;
	struct b43_txstatus_log *log;
	char devdir[16];

	B43_WARN_ON(!dev);
	e = kzalloc(sizeof(*e), GFP_KERNEL);
	if (!e) {
	b43err(dev->wl, "debugfs: add device OOM\n");
	return;
	}
	e->dev = dev;
	log = &e->txstatlog;
	log->log = kcalloc(B43_NR_LOGGED_TXSTATUS,
	sizeof(struct b43_txstatus), GFP_KERNEL);
	if (!log->log) {
	b43err(dev->wl, "debugfs: add device txstatus OOM\n");
	kfree(e);
	return;
	}
	log->end = -1;

	dev->dfsentry = e;

	snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
	e->subdir = debugfs_create_dir(devdir, rootdir);
	if (!e->subdir \|\| IS_ERR(e->subdir)) {
	if (e->subdir == ERR_PTR(-ENODEV)) {
	b43dbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
	"enabled in kernel config\n");
	} else {
	b43err(dev->wl, "debugfs: cannot create %s directory\n",
	devdir);
	}
	dev->dfsentry = NULL;
	kfree(log->log);
	kfree(e);
	return;
	}

	e->mmio16read_next = 0xFFFF; /* invalid address */
	e->mmio32read_next = 0xFFFF; /* invalid address */
	e->shm16read_routing_next = 0xFFFFFFFF; /* invalid routing */
	e->shm16read_addr_next = 0xFFFFFFFF; /* invalid address */
	e->shm32read_routing_next = 0xFFFFFFFF; /* invalid routing */
	e->shm32read_addr_next = 0xFFFFFFFF; /* invalid address */

	#define ADD_FILE(name, mode) \
	do { \
	struct dentry *d; \
	d = debugfs_create_file(__stringify(name), \
	mode, e->subdir, dev, \
	&fops_##name.fops); \
	e->file_##name.dentry = NULL; \
	if (!IS_ERR(d)) \
	e->file_##name.dentry = d; \
	} while (0)


	ADD_FILE(shm16read, 0600);
	ADD_FILE(shm16write, 0200);
	ADD_FILE(shm32read, 0600);
	ADD_FILE(shm32write, 0200);
	ADD_FILE(mmio16read, 0600);
	ADD_FILE(mmio16write, 0200);
	ADD_FILE(mmio32read, 0600);
	ADD_FILE(mmio32write, 0200);
	ADD_FILE(txstat, 0400);
	ADD_FILE(restart, 0200);
	ADD_FILE(loctls, 0400);

	#undef ADD_FILE

	b43_add_dynamic_debug(dev);
	}

	void b43_debugfs_remove_device(struct b43_wldev *dev)
	{
	struct b43_dfsentry *e;

	if (!dev)
	return;
	e = dev->dfsentry;
	if (!e)
	return;
	b43_remove_dynamic_debug(dev);

	debugfs_remove(e->file_shm16read.dentry);
	debugfs_remove(e->file_shm16write.dentry);
	debugfs_remove(e->file_shm32read.dentry);
	debugfs_remove(e->file_shm32write.dentry);
	debugfs_remove(e->file_mmio16read.dentry);
	debugfs_remove(e->file_mmio16write.dentry);
	debugfs_remove(e->file_mmio32read.dentry);
	debugfs_remove(e->file_mmio32write.dentry);
	debugfs_remove(e->file_txstat.dentry);
	debugfs_remove(e->file_restart.dentry);
	debugfs_remove(e->file_loctls.dentry);

	debugfs_remove(e->subdir);
	kfree(e->txstatlog.log);
	kfree(e);
	}

	void b43_debugfs_log_txstat(struct b43_wldev *dev,
	const struct b43_txstatus *status)
	{
	struct b43_dfsentry *e = dev->dfsentry;
	struct b43_txstatus_log *log;
	struct b43_txstatus *cur;
	int i;

	if (!e)
	return;
	log = &e->txstatlog;
	i = log->end + 1;
	if (i == B43_NR_LOGGED_TXSTATUS)
	i = 0;
	log->end = i;
	cur = &(log->log[i]);
	memcpy(cur, status, sizeof(*cur));
	}

	void b43_debugfs_init(void)
	{
	rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
	if (IS_ERR(rootdir))
	rootdir = NULL;
	}

	void b43_debugfs_exit(void)
	{
	debugfs_remove(rootdir);
	}