linux/drivers/net/wireless/b43/debugfs.c
Arnd Bergmann 2b18ab36cf net/wireless: use generic_file_llseek in debugfs
The default llseek operation is changing from
default_llseek to no_llseek, so all code relying on
the current behaviour needs to make that explicit.

The wireless driver infrastructure and some of the drivers
make use of generated debugfs files, so they cannot
be converted by our script that automatically determines
the right operation.

All these files use debugfs and they typically rely
on simple_read_from_buffer, so the best llseek operation
here is generic_file_llseek.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
2010-09-16 10:33:08 +02:00

833 lines
19 KiB
C

/*
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, \
.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);
}