- 根目录:
- drivers
- net
- wireless
- b43
- debugfs.c
/*
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 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);
}