[B43LEGACY]: add mac80211-based driver for legacy BCM43xx devices
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/b43legacy/debugfs.c b/drivers/net/wireless/b43legacy/debugfs.c
new file mode 100644
index 0000000..eefa6fb79
--- /dev/null
+++ b/drivers/net/wireless/b43legacy/debugfs.c
@@ -0,0 +1,505 @@
+/*
+
+ Broadcom B43legacy 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 "b43legacy.h"
+#include "main.h"
+#include "debugfs.h"
+#include "dma.h"
+#include "pio.h"
+#include "xmit.h"
+
+
+/* The root directory. */
+static struct dentry *rootdir;
+
+struct b43legacy_debugfs_fops {
+ ssize_t (*read)(struct b43legacy_wldev *dev, char *buf, size_t bufsize);
+ int (*write)(struct b43legacy_wldev *dev, const char *buf, size_t count);
+ struct file_operations fops;
+ /* Offset of struct b43legacy_dfs_file in struct b43legacy_dfsentry */
+ size_t file_struct_offset;
+ /* Take wl->irq_lock before calling read/write? */
+ bool take_irqlock;
+};
+
+static inline
+struct b43legacy_dfs_file * fops_to_dfs_file(struct b43legacy_wldev *dev,
+ const struct b43legacy_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 "b43legacy: fappend overflow\n"); \
+ } while (0)
+
+
+/* wl->irq_lock is locked */
+static ssize_t tsf_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize)
+{
+ ssize_t count = 0;
+ u64 tsf;
+
+ b43legacy_tsf_read(dev, &tsf);
+ fappend("0x%08x%08x\n",
+ (unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
+ (unsigned int)(tsf & 0xFFFFFFFFULL));
+
+ return count;
+}
+
+/* wl->irq_lock is locked */
+static int tsf_write_file(struct b43legacy_wldev *dev, const char *buf, size_t count)
+{
+ u64 tsf;
+
+ if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1)
+ return -EINVAL;
+ b43legacy_tsf_write(dev, tsf);
+
+ return 0;
+}
+
+/* wl->irq_lock is locked */
+static ssize_t ucode_regs_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize)
+{
+ ssize_t count = 0;
+ int i;
+
+ for (i = 0; i < 64; i++) {
+ fappend("r%d = 0x%04x\n", i,
+ b43legacy_shm_read16(dev, B43legacy_SHM_WIRELESS, i));
+ }
+
+ return count;
+}
+
+/* wl->irq_lock is locked */
+static ssize_t shm_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize)
+{
+ ssize_t count = 0;
+ int i;
+ u16 tmp;
+ __le16 *le16buf = (__le16 *)buf;
+
+ for (i = 0; i < 0x1000; i++) {
+ if (bufsize <= 0)
+ break;
+ tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 2 * i);
+ le16buf[i] = cpu_to_le16(tmp);
+ count += sizeof(tmp);
+ bufsize -= sizeof(tmp);
+ }
+
+ return count;
+}
+
+static ssize_t txstat_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize)
+{
+ struct b43legacy_txstatus_log *log = &dev->dfsentry->txstatlog;
+ ssize_t count = 0;
+ unsigned long flags;
+ int i, idx;
+ struct b43legacy_txstatus *stat;
+
+ spin_lock_irqsave(&log->lock, flags);
+ if (log->end < 0) {
+ fappend("Nothing transmitted, yet\n");
+ goto out_unlock;
+ }
+ fappend("b43legacy 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 == B43legacy_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_unlock:
+ spin_unlock_irqrestore(&log->lock, flags);
+
+ return count;
+}
+
+/* wl->irq_lock is locked */
+static int restart_write_file(struct b43legacy_wldev *dev, const char *buf, size_t count)
+{
+ int err = 0;
+
+ if (count > 0 && buf[0] == '1') {
+ b43legacy_controller_restart(dev, "manually restarted");
+ } else
+ err = -EINVAL;
+
+ return err;
+}
+
+#undef fappend
+
+static int b43legacy_debugfs_open(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+ return 0;
+}
+
+static ssize_t b43legacy_debugfs_read(struct file *file, char __user *userbuf,
+ size_t count, loff_t *ppos)
+{
+ struct b43legacy_wldev *dev;
+ struct b43legacy_debugfs_fops *dfops;
+ struct b43legacy_dfs_file *dfile;
+ ssize_t ret = 0;
+ char *buf;
+ const size_t bufsize = 1024 * 128;
+ 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 (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
+ err = -ENODEV;
+ goto out_unlock;
+ }
+
+ dfops = container_of(file->f_op, struct b43legacy_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);
+ if (dfops->take_irqlock) {
+ spin_lock_irq(&dev->wl->irq_lock);
+ ret = dfops->read(dev, buf, bufsize);
+ spin_unlock_irq(&dev->wl->irq_lock);
+ } else
+ 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 b43legacy_debugfs_write(struct file *file,
+ const char __user *userbuf,
+ size_t count, loff_t *ppos)
+{
+ struct b43legacy_wldev *dev;
+ struct b43legacy_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 (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
+ err = -ENODEV;
+ goto out_unlock;
+ }
+
+ dfops = container_of(file->f_op, struct b43legacy_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;
+ }
+ if (dfops->take_irqlock) {
+ spin_lock_irq(&dev->wl->irq_lock);
+ err = dfops->write(dev, buf, count);
+ spin_unlock_irq(&dev->wl->irq_lock);
+ } else
+ 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 B43legacy_DEBUGFS_FOPS(name, _read, _write, _take_irqlock) \
+ static struct b43legacy_debugfs_fops fops_##name = { \
+ .read = _read, \
+ .write = _write, \
+ .fops = { \
+ .open = b43legacy_debugfs_open, \
+ .read = b43legacy_debugfs_read, \
+ .write = b43legacy_debugfs_write, \
+ }, \
+ .file_struct_offset = offsetof(struct b43legacy_dfsentry, \
+ file_##name), \
+ .take_irqlock = _take_irqlock, \
+ }
+
+B43legacy_DEBUGFS_FOPS(tsf, tsf_read_file, tsf_write_file, 1);
+B43legacy_DEBUGFS_FOPS(ucode_regs, ucode_regs_read_file, NULL, 1);
+B43legacy_DEBUGFS_FOPS(shm, shm_read_file, NULL, 1);
+B43legacy_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0);
+B43legacy_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1);
+
+
+int b43legacy_debug(struct b43legacy_wldev *dev, enum b43legacy_dyndbg feature)
+{
+ return !!(dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
+}
+
+static void b43legacy_remove_dynamic_debug(struct b43legacy_wldev *dev)
+{
+ struct b43legacy_dfsentry *e = dev->dfsentry;
+ int i;
+
+ for (i = 0; i < __B43legacy_NR_DYNDBG; i++)
+ debugfs_remove(e->dyn_debug_dentries[i]);
+}
+
+static void b43legacy_add_dynamic_debug(struct b43legacy_wldev *dev)
+{
+ struct b43legacy_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", B43legacy_DBG_XMITPOWER, 0);
+ add_dyn_dbg("debug_dmaoverflow", B43legacy_DBG_DMAOVERFLOW, 0);
+ add_dyn_dbg("debug_dmaverbose", B43legacy_DBG_DMAVERBOSE, 0);
+ add_dyn_dbg("debug_pwork_fast", B43legacy_DBG_PWORK_FAST, 0);
+ add_dyn_dbg("debug_pwork_stop", B43legacy_DBG_PWORK_STOP, 0);
+
+#undef add_dyn_dbg
+}
+
+void b43legacy_debugfs_add_device(struct b43legacy_wldev *dev)
+{
+ struct b43legacy_dfsentry *e;
+ struct b43legacy_txstatus_log *log;
+ char devdir[16];
+
+ B43legacy_WARN_ON(!dev);
+ e = kzalloc(sizeof(*e), GFP_KERNEL);
+ if (!e) {
+ b43legacyerr(dev->wl, "debugfs: add device OOM\n");
+ return;
+ }
+ e->dev = dev;
+ log = &e->txstatlog;
+ log->log = kcalloc(B43legacy_NR_LOGGED_TXSTATUS,
+ sizeof(struct b43legacy_txstatus), GFP_KERNEL);
+ if (!log->log) {
+ b43legacyerr(dev->wl, "debugfs: add device txstatus OOM\n");
+ kfree(e);
+ return;
+ }
+ log->end = -1;
+ spin_lock_init(&log->lock);
+
+ 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)) {
+ b43legacydbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
+ "enabled in kernel config\n");
+ } else {
+ b43legacyerr(dev->wl, "debugfs: cannot create %s directory\n",
+ devdir);
+ }
+ dev->dfsentry = NULL;
+ kfree(log->log);
+ kfree(e);
+ return;
+ }
+
+#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(tsf, 0600);
+ ADD_FILE(ucode_regs, 0400);
+ ADD_FILE(shm, 0400);
+ ADD_FILE(txstat, 0400);
+ ADD_FILE(restart, 0200);
+
+#undef ADD_FILE
+
+ b43legacy_add_dynamic_debug(dev);
+}
+
+void b43legacy_debugfs_remove_device(struct b43legacy_wldev *dev)
+{
+ struct b43legacy_dfsentry *e;
+
+ if (!dev)
+ return;
+ e = dev->dfsentry;
+ if (!e)
+ return;
+ b43legacy_remove_dynamic_debug(dev);
+
+ debugfs_remove(e->file_tsf.dentry);
+ debugfs_remove(e->file_ucode_regs.dentry);
+ debugfs_remove(e->file_shm.dentry);
+ debugfs_remove(e->file_txstat.dentry);
+ debugfs_remove(e->file_restart.dentry);
+
+ debugfs_remove(e->subdir);
+ kfree(e->txstatlog.log);
+ kfree(e);
+}
+
+void b43legacy_debugfs_log_txstat(struct b43legacy_wldev *dev,
+ const struct b43legacy_txstatus *status)
+{
+ struct b43legacy_dfsentry *e = dev->dfsentry;
+ struct b43legacy_txstatus_log *log;
+ struct b43legacy_txstatus *cur;
+ int i;
+
+ if (!e)
+ return;
+ log = &e->txstatlog;
+ B43legacy_WARN_ON(!irqs_disabled());
+ spin_lock(&log->lock);
+ i = log->end + 1;
+ if (i == B43legacy_NR_LOGGED_TXSTATUS)
+ i = 0;
+ log->end = i;
+ cur = &(log->log[i]);
+ memcpy(cur, status, sizeof(*cur));
+ spin_unlock(&log->lock);
+}
+
+void b43legacy_debugfs_init(void)
+{
+ rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
+ if (IS_ERR(rootdir))
+ rootdir = NULL;
+}
+
+void b43legacy_debugfs_exit(void)
+{
+ debugfs_remove(rootdir);
+}