Initial import

1 files changed, 826 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43/debugfs.c b/drivers/net/wireless/b43/debugfs.c
new file mode 100644
index 000000000..e807bd930
--- /dev/null
+++ b/drivers/net/wireless/b43/debugfs.c
@@ -0,0 +1,826 @@
+/*
+
+  Broadcom B43 wireless driver
+
+  debugfs driver debugging code
+
+  Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
+
+  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 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	= simple_open,			\
+			.read	= b43_debugfs_read,		\
+			.write	= b43_debugfs_write,		\
+			.llseek = generic_file_llseek,		\
+		},						\
+		.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);
+}